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
15 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
16 $sender_host_name and config options to manage this, and basic check
19 PP/05 DSCP support for outbound connections and control modifier for inbound.
21 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
22 (Only plugin which currently uses this is kerberos4, which nobody should
23 be using, but we should make it available and other future plugins might
24 conceivably use it, even though it would break NAT; stuff *should* be
25 using channel bindings instead).
27 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
28 name; added for Sendmail compatibility; requires admin caller.
29 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
30 just ignore it); requires trusted caller.
31 Also parse but ignore: -Ac -Am -X<logfile>
34 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
36 TL/02 Add +smtp_confirmation as a default logging option.
38 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
39 Patch by Magnus Holmgren from 2007-02-20.
41 TL/04 Bugzilla 1281 - Spec typo.
42 Bugzilla 1283 - Spec typo.
43 Bugzilla 1290 - Spec grammar fixes.
45 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
47 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
49 JH/02 Support "G" suffix to numbers in ${if comparisons.
51 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
53 NM/01 Bugzilla 1197 - Spec typo
54 Bugzilla 1196 - Spec examples corrections
56 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
58 PP/09 Add gnutls_enable_pkcs11 option.
60 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
61 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
63 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
64 "acl {{name}{arg}...}", and optional args on acl condition
67 JH/05 Permit multiple router/transport headers_add/remove lines.
72 PP/01 Handle short writes when writing local log-files.
73 In practice, only affects FreeBSD (8 onwards).
74 Bugzilla 1053, with thanks to Dmitry Isaikin.
76 NM/01 Bugzilla 949 - Documentation tweak
78 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
81 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
83 PP/02 Implemented gsasl authenticator.
85 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
87 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
88 `pkg-config foo` for cflags/libs.
90 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
91 with rest of GSASL and with heimdal_gssapi.
93 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
94 `pkg-config foo` for cflags/libs for the TLS implementation.
96 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
97 properties get this fed in as external SSF. A number of robustness
98 and debugging improvements to the cyrus_sasl authenticator.
100 PP/08 cyrus_sasl server now expands the server_realm option.
102 PP/09 Bugzilla 1214 - Log authentication information in reject log.
103 Patch by Jeremy Harris.
105 PP/10 Added dbmjz lookup type.
107 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
109 PP/12 MAIL args handles TAB as well as SP, for better interop with
110 non-compliant senders.
111 Analysis and variant patch by Todd Lyons.
113 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
114 Bug report from Lars Müller <lars@samba.org> (via SUSE),
115 Patch from Dirk Mueller <dmueller@suse.com>
117 PP/13 tls_peerdn now print-escaped for spool files.
118 Observed some $tls_peerdn in wild which contained \n, which resulted
119 in spool file corruption.
121 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
122 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
123 or write after TLS renegotiation, which otherwise led to messages
126 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
127 as a tracking header (ie: a signed header comes before the signature).
128 Patch from Wolfgang Breyha.
130 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
131 comma-sep list; embedded commas doubled.
133 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
135 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
137 Report and patch from Dmitry Banschikov.
139 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
140 Removed SSL_clear() after SSL_new() which led to protocol negotiation
141 failures. We appear to now support TLS1.1+ with Exim.
143 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
144 lets Exim select keys and certificates based upon TLS SNI from client.
145 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
146 before an outbound SMTP session. New log_selector, +tls_sni.
148 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
149 NULL dereference. Report and patch from Alun Jones.
151 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
152 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
153 Not seeing resolver debug output on NetBSD, but suspect this is a
154 resolver implementation change.
156 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
157 Left warnings. Added "eximon gdb" invocation mode.
159 PP/21 Defaulting "accept_8bitmime" to true, not false.
161 PP/22 Added -bw for inetd wait mode support.
163 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
164 locate the relevant includes and libraries. Made this the default.
166 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
167 Bugzilla 1246, report and most of solution from Tomasz Kusy.
169 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
170 This may cause build issues on older platforms.
172 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
173 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
174 gnutls_require_mac & gnutls_require_protocols (no longer supported).
175 Added SNI support via GnuTLS too.
176 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
178 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
180 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
181 Applied second patch from Janne, implementing suggestion to default
182 multiple-strings-in-record handling to match SPF spec.
184 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
186 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
187 read-only, out of scope).
188 Patch from Wolfgang Breyha, report from Stuart Northfield.
190 PP/29 Fix three issues highlighted by clang analyser static analysis.
191 Only crash-plausible issue would require the Cambridge-specific
192 iplookup router and a misconfiguration.
193 Report from Marcin Mirosław.
195 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
197 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
198 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
199 As part of this, removing so much warning spew let me fix some minor
200 real issues in debug logging.
202 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
203 assignment on my part. Fixed.
205 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
206 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
207 Janne Snabb (who went above and beyond: thank you).
209 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
210 string otherwise requires a connection and a bunch more work and it's
211 relatively easy to get wrong. Should also expose TLS library linkage
214 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
215 64-bit ${eval} (JH/03).
217 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
218 GNU libc to support some of the 64-bit stuff, should not lead to
219 conflicts. Defined before os.h is pulled in, so if a given platform
220 needs to override this, it can.
222 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
223 protection layer was required, which is not implemented.
224 Bugzilla 1254, patch from Wolfgang Breyha.
226 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
227 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
228 tls_dhparam take prime identifiers. Also unbreak combination of
229 OpenSSL+DH_params+TLSSNI.
231 PP/39 Disable SSLv2 by default in OpenSSL support.
237 PP/01 Solaris build fix for Oracle's LDAP libraries.
238 Bugzilla 1109, patch from Stephen Usher.
240 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
242 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
245 TF/02 Fix a couple more cases where we did not log the error message
246 when unlink() failed. See also change 4.74-TF/03.
248 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
249 lock up or crash if it happened to be inside a call to libc when it
250 got a SIGUSR1 from exiwhat.
252 The SIGUSR1 handler appends the current process status to the process
253 log which is later printed by exiwhat. It used to use the general
254 purpose logging code to do this, but several functions it calls are
255 not safe for signals.
257 The new output code in the SIGUSR1 handler is specific to the process
258 log, and simple enough that it's easy to inspect for signal safety.
259 Removing some special cases also simplifies the general logging code.
260 Removing the spurious timestamps from the process log simplifies
263 TF/04 Improved ratelimit ACL condition.
265 The /noupdate option has been deprecated in favour of /readonly which
266 has clearer semantics. The /leaky, /strict, and /readonly update modes
267 are mutually exclusive. The update mode is no longer included in the
268 database key; it just determines when the database is updated. (This
269 means that when you upgrde Exim will forget old rate measurements.)
271 Exim now checks that the per_* options are used with an update mode that
272 makes sense for the current ACL. For example, when Exim is processing a
273 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
274 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
275 must specify per_mail/readonly. If you omit the update mode it defaults to
276 /leaky where that makes sense (as before) or /readonly where required.
278 The /noupdate option is now undocumented but still supported for
279 backwards compatibility. It is equivalent to /readonly except that in
280 ACLs where /readonly is required you may specify /leaky/noupdate or
281 /strict/noupdate which are treated the same as /readonly.
283 A useful new feature is the /count= option. This is a generalization
284 of the per_byte option, so that you can measure the throughput of other
285 aggregate values. For example, the per_byte option is now equivalent
286 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
288 The per_rcpt option has been generalized using the /count= mechanism
289 (though it's more complicated than the per_byte equivalence). When it is
290 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
291 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
292 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
293 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
294 Note that using per_rcpt with a non-readonly update mode in more than
295 one ACL will cause the recipients to be double-counted. (The per_mail
296 and per_byte options don't have this problem.)
298 The handling of very low rates has changed slightly. If the computed rate
299 is less than the event's count (usually one) then this event is the first
300 after a long gap. In this case the rate is set to the same as this event's
301 count, so that the first message of a spam run is counted properly.
303 The major new feature is a mechanism for counting the rate of unique
304 events. The new per_addr option counts the number of different
305 recipients that someone has sent messages to in the last time period. It
306 behaves like per_rcpt if all the recipient addresses are different, but
307 duplicate recipient addresses do not increase the measured rate. Like
308 the /count= option this is a general mechanism, so the per_addr option
309 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
310 example, measure the rate that a client uses different sender addresses
311 with the options per_mail/unique=$sender_address. There are further
312 details in the main documentation.
314 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
316 TF/06 Removed a few PCRE remnants.
318 TF/07 Automatically extract Exim's version number from tags in the git
319 repository when doing development or release builds.
321 PP/02 Raise smtp_cmd_buffer_size to 16kB.
322 Bugzilla 879. Patch from Paul Fisher.
324 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
325 Heavily based on revision 40f9a89a from Simon Arlott's tree.
328 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
330 PP/05 Variable $av_failed, true if the AV scanner deferred.
331 Bugzilla 1078. Patch from John Horne.
333 PP/06 Stop make process more reliably on build failure.
334 Bugzilla 1087. Patch from Heiko Schlittermann.
336 PP/07 Make maildir_use_size_file an _expandable_ boolean.
337 Bugzilla 1089. Patch from Heiko Schlittermann.
339 PP/08 Handle ${run} returning more data than OS pipe buffer size.
340 Bugzilla 1131. Patch from Holger Weiß.
342 PP/09 Handle IPv6 addresses with SPF.
343 Bugzilla 860. Patch from Wolfgang Breyha.
345 PP/10 GnuTLS: support TLS 1.2 & 1.1.
347 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
350 PP/11 match_* no longer expand right-hand-side by default.
351 New compile-time build option, EXPAND_LISTMATCH_RHS.
352 New expansion conditions, "inlist", "inlisti".
354 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
356 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
358 PP/14 fix log_write() format string regression from TF/03.
359 Bugzilla 1152. Patch from Dmitry Isaikin.
365 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
367 PP/02 Harmonised TLS library version reporting; only show if debugging.
368 Layout now matches that introduced for other libraries in 4.74 PP/03.
370 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
372 PP/04 New "dns_use_edns0" global option.
374 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
377 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
378 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
380 TK/01 Updated PolarSSL code to 0.14.2.
381 Bugzilla 1097. Patch from Andreas Metzler.
383 PP/07 Catch divide-by-zero in ${eval:...}.
386 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
389 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
390 format-string attack -- SECURITY: remote arbitrary code execution.
392 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
393 time unintentionally subject to list matching rules, letting the header
394 cause arbitrary Exim lookups (of items which can occur in lists, *not*
395 arbitrary string expansion). This allowed for information disclosure.
397 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
398 INT_MIN/-1 -- value coerced to INT_MAX.
404 NM/01 Workround for PCRE version dependency in version reporting
407 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
408 This fixes portability to compilers other than gcc, notably
409 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
411 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
412 makefiles for portability to HP-UX and POSIX correctness.
414 PP/01 Permit LOOKUP_foo enabling on the make command-line.
415 Also via indented variable definition in the Makefile.
416 (Debugging by Oliver Heesakkers).
418 PP/02 Restore caching of spamd results with expanded spamd_address.
419 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
421 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
422 Improves build reliability. Fix from: Frank Elsner
424 NM/02 Fix wide character breakage in the rfc2047 coding
425 Fixes bug 1064. Patch from Andrey N. Oktyabrski
427 NM/03 Allow underscore in dnslist lookups
428 Fixes bug 1026. Patch from Graeme Fowler
430 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
431 Code patches from Adam Ciarcinski of NetBSD.
433 NM/04 Fixed exiqgrep to cope with mailq missing size issue
436 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
437 is logged, to avoid truncation. Patch from John Horne.
439 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
440 Patch from Jakob Hirsch.
442 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
443 SQL string expansion failure details.
444 Patch from Andrey Oktyabrski.
446 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
447 Patch from Simon Arlott.
449 PP/09 New lookups functionality failed to compile on old gcc which rejects
450 extern declarations in function scope.
451 Patch from Oliver Fleischmann
453 PP/10 Use sig_atomic_t for flags set from signal handlers.
454 Check getgroups() return and improve debugging.
455 Fixed developed for diagnosis in bug 927 (which turned out to be
458 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
459 Patch from Mark Zealey.
461 PP/12 Bugzilla 1056: Improved spamd server selection.
462 Patch from Mark Zealey.
464 PP/13 Bugzilla 1086: Deal with maildir quota file races.
465 Based on patch from Heiko Schlittermann.
467 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
468 Patch from Uwe Doering, sign-off by Michael Haardt.
470 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
471 variable declaration deep within a block. Bug and patch from
474 PP/15 lookups-Makefile IRIX compatibilty coercion.
476 PP/16 Make DISABLE_DKIM build knob functional.
478 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
479 Patch by Simon Arlott
481 TF/03 Fix valgrind.h portability to C89 compilers that do not support
482 variable argument macros. Our copy now differs from upstream.
488 TF/01 Failure to get a lock on a hints database can have serious
489 consequences so log it to the panic log.
491 TF/02 Log LMTP confirmation messages in the same way as SMTP,
492 controlled using the smtp_confirmation log selector.
494 TF/03 Include the error message when we fail to unlink a spool file.
496 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
497 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
498 for maintaining out-of-tree patches for some time.
500 PP/01 Bugzilla 139: Documentation and portability issues.
501 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
502 Handle per-OS dynamic-module compilation flags.
504 PP/02 Let /dev/null have normal permissions.
505 The 4.73 fixes were a little too stringent and complained about the
506 permissions on /dev/null. Exempt it from some checks.
507 Reported by Andreas M. Kirchwitz.
509 PP/03 Report version information for many libraries, including
510 Exim version information for dynamically loaded libraries. Created
511 version.h, now support a version extension string for distributors
512 who patch heavily. Dynamic module ABI change.
514 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
515 privilege escalation vulnerability whereby the Exim run-time user
516 can cause root to append content of the attacker's choosing to
519 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
522 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
523 If dropping privileges for untrusted macros, we disabled normal logging
524 on the basis that it would fail; for the Exim run-time user, this is not
525 the case, and it resulted in successful deliveries going unlogged.
526 Fixed. Reported by Andreas Metzler.
532 PP/01 Date: & Message-Id: revert to normally being appended to a message,
533 only prepend for the Resent-* case. Fixes regression introduced in
534 Exim 4.70 by NM/22 for Bugzilla 607.
536 PP/02 Include check_rfc2047_length in configure.default because we're seeing
537 increasing numbers of administrators be bitten by this.
539 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
541 PP/03 Bugzilla 994: added openssl_options main configuration option.
543 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
545 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
547 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
549 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
550 without a peer certificate, leading to a segfault because of an
551 assumption that peers always have certificates. Be a little more
552 paranoid. Problem reported by Martin Tscholak.
554 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
555 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
556 NB: ClamAV planning to remove STREAM in "middle of 2010".
557 CL also introduces -bmalware, various -d+acl logging additions and
558 more caution in buffer sizes.
560 PP/09 Implemented reverse_ip expansion operator.
562 PP/10 Bugzilla 937: provide a "debug" ACL control.
564 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
566 PP/12 Bugzilla 973: Implement --version.
568 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
570 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
572 PP/15 Bugzilla 816: support multiple condition rules on Routers.
574 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
575 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
576 ignore trailing whitespace.
578 JJ/02 prevent non-panic DKIM error from being sent to paniclog
580 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
583 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
584 Notification from Dr Andrew Aitchison.
586 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
587 ExtendedDetectionInfo response format.
588 Notification from John Horne.
590 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
593 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
594 XSL and documented dependency on system catalogs, with examples of how
597 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
600 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
601 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
602 configuration file which is writeable by the Exim user or group.
604 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
605 of configuration files to cover files specified with the -C option if
606 they are going to be used with root privileges, not just the default
609 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
610 option (effectively making it always true).
612 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
613 files to be used while preserving root privileges.
615 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
616 that rogue child processes cannot use them.
618 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
619 run-time user, instead of root.
621 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
622 Exim run-time user without dropping privileges.
624 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
625 result string, instead of calling string_vformat() twice with the same
628 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
629 for other users. Others should always drop root privileges if they use
630 -C on the command line, even for a whitelisted configure file.
632 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
634 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
640 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
641 $data_path, and $header_path variables; fixed documentation bugs and
644 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
645 exipick to access non-standard spools, including the "frozen" queue
648 NM/01 Bugzilla 965: Support mysql stored procedures.
649 Patch from Alain Williams
651 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
653 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
654 Patch from Andreas Metzler
656 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
657 Patch from Kirill Miazine
659 NM/05 Bugzilla 671: Added umask to procmail example.
661 JJ/03 installed exipick 20100323.0, fixing doc bug
663 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
664 directory. Notification and patch from Dan Rosenberg.
666 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
668 TK/02 Improve log output when DKIM signing operation fails.
670 MH/01 Treat the transport option dkim_domain as a colon separated
671 list, not as a single string, and sign the message with each element,
672 omitting multiple occurences of the same signer.
674 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
675 Bugzilla 985, 986. Patch by Simon Arlott
677 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
678 Patch by Simon Arlott
680 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
681 MBX locking. Notification from Dan Rosenberg.
687 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
689 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
691 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
693 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
695 NM/04 Bugzilla 915: Flag broken perl installation during build.
701 TK/01 Added patch by Johannes Berg that expands the main option
702 "spamd_address" if it starts with a dollar sign.
704 TK/02 Write list of recipients to X-Envelope-Sender header when building
705 the mbox-format spool file for content scanning (suggested by Jakob
708 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
709 (http://www.dcc-servers.net/) support via dccifd. Activated by
710 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
712 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
713 by Mark Daniel Reidel <mr@df.eu>.
715 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
716 When building exim an external PCRE library is now needed -
717 PCRE is a system library on the majority of modern systems.
718 See entry on PCRE_LIBS in EDITME file.
720 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
721 conversation. Added nologin parameter to request.
722 Patch contributed by Kirill Miazine.
724 TF/01 Do not log submission mode rewrites if they do not change the address.
726 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
728 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
729 log files in place. Contributed by Roberto Lima.
731 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
733 TF/03 Bugzilla 615: When checking the local_parts router precondition
734 after a local_part_suffix or local_part_prefix option, Exim now
735 does not use the address's named list lookup cache, since this
736 contains cached lookups for the whole local part.
738 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
739 Robert Millan. Documentation is in experimental-spec.txt.
741 TF/04 Bugzilla 668: Fix parallel build (make -j).
743 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
745 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
746 Patch provided by Jan Srzednicki.
748 TF/05 Leading white space used to be stripped from $spam_report which
749 wrecked the formatting. Now it is preserved.
751 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
752 that they are available at delivery time.
754 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
756 TF/08 TLS error reporting now respects the incoming_interface and
757 incoming_port log selectors.
759 TF/09 Produce a more useful error message if an SMTP transport's hosts
760 setting expands to an empty string.
762 NM/06 Bugzilla 744: EXPN did not work under TLS.
763 Patch provided by Phil Pennock.
765 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
766 Patch provided by Richard Godbee.
768 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
769 acl_smtp_notquit, added index entry.
771 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
772 Patch provided by Eugene Bujak.
774 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
775 accept(). Patch provided by Maxim Dounin.
777 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
778 Patch provided by Phil Pennock.
780 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
782 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
783 Patch provided by Brad "anomie" Jorsch.
785 NM/14 Bugzilla 622: Added timeout setting to transport filter.
786 Patch provided by Dean Brooks.
788 TK/05 Add native DKIM support (does not depend on external libraries).
790 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
791 Patch provided by Graeme Fowler.
793 NM/16 Bugzilla 851: Documentation example syntax fix.
795 NM/17 Changed NOTICE file to remove references to embedded PCRE.
797 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
800 NM/19 Bugzilla 745: TLS version reporting.
801 Patch provided by Phil Pennock.
803 NM/20 Bugzilla 167: bool: condition support.
804 Patch provided by Phil Pennock.
806 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
807 clients. Patch provided by Phil Pennock.
809 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
810 Patch provided by Brad "anomie" Jorsch.
812 NM/23 Bugzilla 687: Fix misparses in eximstats.
813 Patch provided by Heiko Schlittermann.
815 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
816 Patch provided by Heiko Schlittermann.
818 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
819 plus update to original patch.
821 NM/26 Bugzilla 799: Documentation correction for ratelimit.
823 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
824 Patch provided by David Brownlee.
826 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
828 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
830 NM/30 Bugzilla 888: TLS documentation bugfixes.
832 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
834 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
835 Unlike the original bugzilla I have changed all shell scripts in src tree.
837 NM/33 Bugzilla 898: Transport filter timeout fix.
838 Patch by Todd Rinaldo.
840 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
841 Patch by Serge Demonchaux.
843 NM/35 Bugzilla 39: Base64 decode bug fixes.
844 Patch by Jakob Hirsch.
846 NM/36 Bugzilla 909: Correct connect() call in dcc code.
848 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
850 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
852 NM/39 Bugzilla 911: Fixed MakeLinks build script.
858 TK/01 Add preliminary DKIM support. Currently requires a forked version of
859 ALT-N's libdkim that I have put here:
860 http://duncanthrax.net/exim-experimental/
862 Note to Michael Haardt: I had to rename some vars in sieve.c. They
863 were called 'true' and it seems that C99 defines that as a reserved
864 keyword to be used with 'bool' variable types. That means you could
865 not include C99-style headers which use bools without triggering
866 build errors in sieve.c.
868 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
869 as mailq or other aliases. Changed the --help handling significantly
870 to do whats expected. exim_usage() emits usage/help information.
872 SC/01 Added the -bylocaldomain option to eximstats.
874 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
876 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
878 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
884 PH/01 Another patch from the Sieve maintainer.
886 PH/02 When an IPv6 address is converted to a string for single-key lookup
887 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
888 dots are used instead of colons so that keys in lsearch files need not
889 contain colons. This was done some time before quoting was made available
890 in lsearch files. However, iplsearch files do require colons in IPv6 keys
891 (notated using the quote facility) so as to distinguish them from IPv4
892 keys. This meant that lookups for IP addresses in host lists did not work
893 for iplsearch lookups.
895 This has been fixed by arranging for IPv6 addresses to be expressed with
896 colons if the lookup type is iplsearch. This is not incompatible, because
897 previously such lookups could never work.
899 The situation is now rather anomolous, since one *can* have colons in
900 ordinary lsearch keys. However, making the change in all cases is
901 incompatible and would probably break a number of configurations.
903 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
906 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
907 conversion specification without a maximum field width, thereby enabling
908 a rogue spamd server to cause a buffer overflow. While nobody in their
909 right mind would setup Exim to query an untrusted spamd server, an
910 attacker that gains access to a server running spamd could potentially
911 exploit this vulnerability to run arbitrary code as the Exim user.
913 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
914 $primary_hostname instead of what libspf2 thinks the hosts name is.
916 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
917 a directory entry by the name of the lookup key. Previously, if a
918 symlink pointed to a non-existing file or a file in a directory that
919 Exim lacked permissions to read, a lookup for a key matching that
920 symlink would fail. Now it is enough that a matching directory entry
921 exists, symlink or not. (Bugzilla 503.)
923 PH/03 The body_linecount and body_zerocount variables are now exported in the
926 PH/04 Added the $dnslist_matched variable.
928 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
929 This means they are set thereafter only if the connection becomes
932 PH/06 Added the client_condition to authenticators so that some can be skipped
933 by clients under certain conditions.
935 PH/07 The error message for a badly-placed control=no_multiline_responses left
936 "_responses" off the end of the name.
938 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
940 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
941 (without spaces) instead of just copying the configuration text.
943 PH/10 Added the /noupdate option to the ratelimit ACL condition.
945 PH/11 Added $max_received_linelength.
947 PH/12 Added +ignore_defer and +include_defer to host lists.
949 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
950 way in which PCRE > 7.0 is built.
952 PH/14 Implemented queue_only_load_latch.
954 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
955 MAIL command. The effect was to mangle the value on 64-bit systems.
957 PH/16 Another patch from the Sieve maintainer.
959 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
961 PH/18 If a system quota error occurred while trying to create the file for
962 a maildir delivery, the message "Mailbox is full" was not appended to the
963 bounce if the delivery eventually timed out. Change 4.67/27 below applied
964 only to a quota excession during the actual writing of the file.
966 PH/19 It seems that peer DN values may contain newlines (and other non-printing
967 characters?) which causes problems in log lines. The DN values are now
968 passed through string_printing() before being added to log lines.
970 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
971 and InterBase are left for another time.)
973 PH/21 Added message_body_newlines option.
975 PH/22 Guard against possible overflow in moan_check_errorcopy().
977 PH/23 POSIX allows open() to be a macro; guard against that.
979 PH/24 If the recipient of an error message contained an @ in the local part
980 (suitably quoted, of course), incorrect values were put in $domain and
981 $local_part during the evaluation of errors_copy.
987 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
988 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
991 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
992 issue a MAIL command.
994 PH/02 In an ACL statement such as
996 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
998 if a client was not listed at all, or was listed with a value other than
999 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1000 the condition was not true (as it should be), so access was not denied.
1001 The bug was that the ! inversion was incorrectly passed on to the second
1002 item. This has been fixed.
1004 PH/03 Added additional dnslists conditions == and =& which are different from
1005 = and & when the dns lookup returns more than one IP address.
1007 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1008 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1010 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1011 FSYNC, which compiles an option called disable_fsync that allows for
1012 bypassing fsync(). The documentation is heavily laced with warnings.
1014 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1016 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1017 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1018 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1019 including adding "make clean"; (3) Added -fPIC when compiling the test
1020 dynamically loaded module, to get rid of a warning.
1022 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1023 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1024 = 0s. The bug is otherwise harmless.
1026 PH/07 There was a bug in the dovecot authenticator such that the value of
1027 $auth1 could be overwritten, and so not correctly preserved, after a
1028 successful authentication. This usually meant that the value preserved by
1029 the server_setid option was incorrect.
1031 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1033 PH/09 Installed PCRE release 7.0.
1035 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1036 run for batched SMTP input. It is now run at the start of every message
1037 in the batch. While fixing this I discovered that the process information
1038 (output by running exiwhat) was not always getting set for -bs and -bS
1039 input. This is fixed, and it now also says "batched" for BSMTP.
1041 PH/11 Added control=no_pipelining.
1043 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1044 patch, slightly modified), and move the expansion of helo_data till after
1045 the connection is made in the smtp transport (so it can use these
1048 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1050 PH/14 Added log_selector = +pid.
1052 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1054 PH/16 Add ${if forany and ${if forall.
1056 PH/17 Added dsn_from option to vary the From: line in DSNs.
1058 PH/18 Flush SMTP output before performing a callout, unless control =
1059 no_callout_flush is set.
1061 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1062 was true (the default) a successful delivery failed to delete the retry
1063 item, thus causing premature timeout of the address. The bug is now
1066 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1068 PH/21 Long custom messages for fakedefer and fakereject are now split up
1069 into multiline reponses in the same way that messages for "deny" and
1070 other ACL rejections are.
1072 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1073 with slight modification.
1075 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1076 draft, changing the syntax and factoring some duplicate code".
1078 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1079 for deliveries of the second and subsequent messages over the same SMTP
1082 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1083 ${reduce, with only minor "tidies".
1085 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1087 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1088 expansion side effects.
1090 PH/27 When a message times out after an over-quota error from an Exim-imposed
1091 quota, the bounce message says "mailbox is full". This message was not
1092 being given when it was a system quota that was exceeded. It now should
1095 MH/03 Made $recipients available in local_scan(). local_scan() already has
1096 better access to the recipient list through recipients_list[], but
1097 $recipients can be useful in postmaster-provided expansion strings.
1099 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1100 in the case of a MAIL command with additional options following the
1101 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1102 were accidentally chopped off.
1104 PH/29 SMTP synchronization checks are implemented when a command is read -
1105 there is a check that no more input is waiting when there shouldn't be
1106 any. However, for some commands, a delay in an ACL can mean that it is
1107 some time before the response is written. In this time, more input might
1108 arrive, invalidly. So now there are extra checks after an ACL has run for
1109 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1110 pipelining has not been advertised.
1112 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1114 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1115 returned in the SMTP response when smtp_return_error_details was false.
1116 This has been fixed.
1118 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1119 instead of the C I/O that was originally supplied, because problems were
1120 reported on Solaris.
1122 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1123 Exim which did not show up earlier: it was assuming that a call to
1124 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1125 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1126 was a macro that became an assignment, so it seemed to work. This has
1127 changed to a proper function call with a void return, hence the compile
1128 error. Exim's code has been fixed.
1130 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1133 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1135 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1137 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1138 because it turns out to be too big or there is a timeout) there is no
1139 "Completed" line in the log. When some messages of this type were
1140 selected by exigrep, they were listed as "not completed". Others were
1141 picked up by some special patterns. I have improved the selection
1142 criteria to be more general.
1144 PH/38 The host_find_failed option in the manualroute router can now be set
1145 to "ignore", to completely ignore a host whose IP address cannot be
1146 found. If all hosts are ignored, the behaviour is controlled by the new
1147 host_all_ignored option.
1149 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1150 homing or because of multiple MX records with /mx) generated more than
1151 one IP address, and the following item turned out to be the local host,
1152 all the secondary addresses of the first item were incorrectly removed
1153 from the list, along with the local host and any following hosts (which
1154 is what is supposed to happen).
1156 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1157 whoever called Exim into the -H file. In the case of the daemon it was
1158 behaving confusingly. When first started, it used values for whoever
1159 started the daemon, but after a SIGHUP it used the Exim user (because it
1160 calls itself on a restart). I have changed the code so that it now always
1163 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1164 message are rejected with the same error (e.g. no authentication or bad
1165 sender address), and a DATA command is nevertheless sent (as can happen
1166 with PIPELINING or a stupid MUA), the error message that was given to the
1167 RCPT commands is included in the rejection of the DATA command. This is
1168 intended to be helpful for MUAs that show only the final error to their
1171 PH/42 Another patch from the Sieve maintainer.
1173 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1174 Eximstats - Fixed some broken HTML links and added missing column headers
1176 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1177 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1179 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1181 PH/43 Yet another patch from the Sieve maintainer.
1183 PH/44 I found a way to check for a TCP/IP connection going away before sending
1184 the response to the final '.' that terminates a message, but only in the
1185 case where the client has not sent further data following the '.'
1186 (unfortunately, this is allowed). However, in many cases there won't be
1187 any further data because there won't be any more messages to send. A call
1188 to select() can be used: if it shows that the input is "ready", there is
1189 either input waiting, or the socket has been closed. An attempt to read
1190 the next input character can distinguish the two cases. Previously, Exim
1191 would have sent an OK response which the client would never have see.
1192 This could lead to message repetition. This fix should cure that, at
1193 least in a lot of common cases.
1195 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1196 advertised in response to EHLO.
1202 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1203 fixed by 4.65/MH/01 (is this a record?) are fixed:
1205 (i) An empty string was always treated as zero by the numeric comparison
1206 operators. This behaviour has been restored.
1208 (ii) It is documented that the numeric comparison operators always treat
1209 their arguments as decimal numbers. This was broken in that numbers
1210 starting with 0 were being interpreted as octal.
1212 While fixing these problems I realized that there was another issue that
1213 hadn't been noticed. Values of message_size_limit (both the global option
1214 and the transport option) were treated as octal if they started with 0.
1215 The documentation was vague. These values are now always treated as
1216 decimal, and I will make that clear in the documentation.
1222 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1223 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1226 MH/01 Don't check that the operands of numeric comparison operators are
1227 integers when their expansion is in "skipping" mode (fixes bug
1228 introduced by 4.64-PH/07).
1230 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1231 child addresses, Exim now panics and dies. Previously, because the count
1232 is held in a short int, deliveries were likely to be lost. As such a
1233 large number of recipients for a single message is ridiculous
1234 (performance will be very, very poor), I have chosen to impose a limit
1235 rather than extend the field.
1241 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1242 leftover -K file (the existence of which was triggered by #402).
1243 While we were at it, introduced process PID as part of the -K
1244 filename. This should rule out race conditions when creating
1247 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1248 processing considerably. Previous code took too long for large mails,
1249 triggering a timeout which in turn triggers #401.
1251 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1252 in the DK code in transports.c. sendfile() is not really portable,
1253 hence the _LINUX specificness.
1255 TF/01 In the add_headers option to the mail command in an Exim filter,
1256 there was a bug that Exim would claim a syntax error in any
1257 header after the first one which had an odd number of characters
1260 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1261 callout verification, Exim cached a "reject" for the entire domain. This
1262 is correct for most verifications, but it is not correct for a recipient
1263 verification with use_sender or use_postmaster set, because in that case
1264 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1265 case of MAIL FROM:<> rejection from other early rejections (e.g.
1266 rejection of HELO). When verifying a recipient using a non-null MAIL
1267 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1268 Whatever the result of the callout, the value of the domain cache is
1269 left unchanged (for any other kind of callout, getting as far as trying
1270 RCPT means that the domain itself is ok).
1272 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1275 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1276 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1277 session, the daemon ignores ECONNECT errors and logs others; it now
1278 ignores EPIPE as well.
1280 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1281 (quoted-printable decoding).
1283 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1284 later the small subsequent patch to fix an introduced bug.
1286 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1288 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1290 PH/08 An error is now given if message_size_limit is specified negative.
1292 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1293 to be given (somewhat) arbitrary names.
1295 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1298 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1299 miscellaneous code fixes
1301 PH/10 Added the log_reject_target ACL modifier to specify where to log
1304 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1305 hostname. This is wrong, because it relates to the incoming message (and
1306 probably the interface on which it is arriving) and not to the outgoing
1307 callout (which could be using a different interface). This has been
1308 changed to use the value of the helo_data option from the smtp transport
1309 instead - this is what is used when a message is actually being sent. If
1310 there is no remote transport (possible with a router that sets up host
1311 addresses), $smtp_active_hostname is used.
1313 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1314 tweaks were necessary in order to get it to work (see also 21 below):
1315 (a) The code assumed that strncpy() returns a negative number on buffer
1316 overflow, which isn't the case. Replaced with Exim's string_format()
1318 (b) There were several signed/unsigned issues. I just did the minimum
1319 hacking in of casts. There is scope for a larger refactoring.
1320 (c) The code used strcasecmp() which is not a standard C function.
1321 Replaced with Exim's strcmpic() function.
1322 (d) The code set only $1; it now sets $auth1 as well.
1323 (e) A simple test gave the error "authentication client didn't specify
1324 service in request". It would seem that Dovecot has changed its
1325 interface. Fortunately there's a specification; I followed it and
1326 changed what the client sends and it appears to be working now.
1328 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1331 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1332 address A is aliased to B and C, where B exists and C does not. Without
1333 -v the output is "A verified" because verification stops after a
1334 successful redirection if more than one address is generated. However,
1335 with -v the child addresses are also verified. Exim was outputting "A
1336 failed to verify" and then showing the successful verification for C,
1337 with its parentage. It now outputs "B failed to verify", showing B's
1338 parentage before showing the successful verification of C.
1340 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1341 look up a TXT record in a specific list after matching in a combined
1344 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1345 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1346 they consult the DNS. I had assumed they would set it the way they
1347 wanted; and indeed my experiments on Linux seem to show that in some
1348 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1349 To be on the safe side, however, I have now made the interface to
1350 host_find_byname() similar to host_find_bydns(), with an argument
1351 containing the DNS resolver options. The host_find_byname() function now
1352 sets these options at its start, just as host_find_bydns() does. The smtp
1353 transport options dns_qualify_single and dns_search_parents are passed to
1354 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1355 of host_find_byname() use the default settings of RES_DEFNAMES
1356 (qualify_single) but not RES_DNSRCH (search_parents).
1358 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1359 spool_read_header() do less string testing, by means of a preliminary
1360 switch on the second character of optional "-foo" lines. (This is
1361 overdue, caused by the large number of possibilities that now exist.
1362 Originally there were few.) While I was there, I also converted the
1363 str(n)cmp tests so they don't re-test the leading "-" and the first
1364 character, in the hope this might squeeze out yet more improvement.
1366 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1367 flag allowing group syntax was set by the header_syntax check but not
1368 turned off, possible causing trouble later; (2) The flag was not being
1369 set at all for the header_verify test, causing "group"-style headers to
1370 be rejected. I have now set it in this case, and also caused header_
1371 verify to ignore an empty address taken from a group. While doing this, I
1372 came across some other cases where the code for allowing group syntax
1373 while scanning a header line wasn't quite right (mostly, not resetting
1374 the flag correctly in the right place). These bugs could have caused
1375 trouble for malformed header lines. I hope it is now all correct.
1377 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1378 with the "reply" argument non-NULL. The code, however (which originally
1379 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1380 but it didn't always do it. This confused somebody who was copying the
1381 code for some other use. I have removed all the tests.
1383 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1384 feature that was used to support insecure browsers during the U.S. crypto
1385 embargo. It requires special client support, and Exim is probably the
1386 only MTA that supported it -- and would never use it because real RSA is
1387 always available. This code has been removed, because it had the bad
1388 effect of slowing Exim down by computing (never used) parameters for the
1389 RSA_EXPORT functionality.
1391 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1392 authenticator to fail if there's a tab character in the incoming data
1393 (there should never be unless someone is messing about, as it's supposed
1394 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1395 if the connection is using TLS or if the remote IP is the same as the
1396 local IP, and the "valid-client-cert option" if a client certificate has
1399 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1400 authenticators. This can be used for authorization after authentication
1401 succeeds. (In the case of plaintext, it servers for both authentication
1404 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1405 if any retry times were supplied.
1407 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1408 connection, where there is no client IP address to check. In this
1409 situation, the verify now always succeeds.
1411 PH/25 Applied John Jetmore's -Mset patch.
1413 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1415 PH/27 In a string expansion for a processed (not raw) header when multiple
1416 headers of the same name were present, leading whitespace was being
1417 removed from all of them, but trailing whitespace was being removed only
1418 from the last one. Now trailing whitespace is removed from each header
1419 before concatenation. Completely empty headers in a concatenation (as
1420 before) are ignored.
1422 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1423 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1425 PH/29 [Removed. This was a change that I later backed out, and forgot to
1426 correct the ChangeLog entry (that I had efficiently created) before
1427 committing the later change.]
1429 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1430 address errors (4xx response to RCPT) over the same connection as other
1431 messages routed to the same hosts. Such deliveries are always "forced",
1432 so retry times are not inspected. This resulted in far too many retries
1433 for the affected addresses. The effect occurred only when there were more
1434 hosts than the hosts_max_try setting in the smtp transport when it had
1435 the 4xx errors. Those hosts that it had tried were not added to the list
1436 of hosts for which the message was waiting, so if all were tried, there
1437 was no problem. Two fixes have been applied:
1439 (i) If there are any address or message errors in an SMTP delivery, none
1440 of the hosts (tried or untried) are now added to the list of hosts
1441 for which the message is waiting, so the message should not be a
1442 candidate for sending over the same connection that was used for a
1443 successful delivery of some other message. This seems entirely
1444 reasonable: after all the message is NOT "waiting for some host".
1445 This is so "obvious" that I'm not sure why it wasn't done
1446 previously. Hope I haven't missed anything, but it can't do any
1447 harm, as the worst effect is to miss an optimization.
1449 (ii) If, despite (i), such a delivery is accidentally attempted, the
1450 routing retry time is respected, so at least it doesn't keep
1451 hammering the server.
1453 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1454 in ${readsocket because some servers need this prod.
1456 PH/32 Added some extra debug output when updating a wait-xxx database.
1458 PH/33 The hint "could be header name not terminated by colon", which has been
1459 given for certain expansion errors for a long time, was not being given
1460 for the ${if def:h_colon_omitted{... case.
1462 PH/34 The spec says: "With one important exception, whenever a domain list is
1463 being scanned, $domain contains the subject domain." There was at least
1464 one case where this was not true.
1466 PH/35 The error "getsockname() failed: connection reset by peer" was being
1467 written to the panic log as well as the main log, but it isn't really
1468 panic-worthy as it just means the connection died rather early on. I have
1469 removed the panic log writing for the ECONNRESET error when getsockname()
1472 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1473 runs only) independently of the message's sender address. This meant
1474 that, if the 4xx error was in fact related to the sender, a different
1475 message to the same recipient with a different sender could confuse
1476 things. In particualar, this can happen when sending to a greylisting
1477 server, but other circumstances could also provoke similar problems.
1478 I have changed the default so that the retry time for these errors is now
1479 based a combination of the sender and recipient addresses. This change
1480 can be overridden by setting address_retry_include_sender=false in the
1483 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1484 remote server are returned as part of bounce messages. This was not
1485 happening for LMTP over a pipe (the lmtp transport), but now it is the
1486 same for both kinds of LMTP.
1488 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1489 in header lines that were in fact CNAMEs. This is no longer the case.
1491 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1492 and queue runs started by the daemon processed all messages. This has
1493 been fixed so that -R and -S can now usefully be given with -q<time>.
1495 PH/40 Import PCRE release 6.7 (fixes some bugs).
1497 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1499 PH/42 Give an error if -q is specified more than once.
1501 PH/43 Renamed the variables $interface_address and $interface_port as
1502 $received_ip_address and $received_port, to make it clear that these
1503 values apply to message reception, and not to the outgoing interface when
1504 a message is delivered. (The old names remain recognized, of course.)
1506 PH/44 There was no timeout on the connect() call when using a Unix domain
1507 socket in the ${readsocket expansion. There now is.
1509 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1510 be meaningful with "accept".
1512 SC/01 Eximstats V1.43
1513 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1515 SC/02 Eximstats V1.44
1516 Use a glob alias rather than an array ref in the generated
1517 parser. This improves both readability and performance.
1519 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1520 Collect SpamAssassin and rejection statistics.
1521 Don't display local sender or destination tables unless
1522 there is data to show.
1523 Added average volumes into the top table text output.
1525 SC/04 Eximstats V1.46
1526 Collect data on the number of addresses (recipients)
1527 as well as the number of messages.
1529 SC/05 Eximstats V1.47
1530 Added 'Message too big' to the list of mail rejection
1531 reasons (thanks to Marco Gaiarin).
1533 SC/06 Eximstats V1.48
1534 Mainlog lines which have GMT offsets and are too short to
1535 have a flag are now skipped.
1537 SC/07 Eximstats V1.49 (Alain Williams)
1538 Added the -emptyok flag.
1540 SC/08 Eximstats V1.50
1541 Fixes for obtaining the IP address from reject messages.
1543 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1544 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1545 whitesspace changes from 4.64-PH/27
1547 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1550 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1551 are found, allow negative numbers in numeric criteria)
1553 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1555 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1556 to match changes made in 4.64-PH/43
1558 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1560 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1561 "domain" is actually an IP address, and force a failure. This locks out
1562 those revolvers/nameservers that support "A-for-A" lookups, in
1563 contravention of the specifications.
1565 PH/48 When a host name was looked up from an IP address, and the subsequent
1566 forward lookup of the name timed out, the host name was left in
1567 $sender_host_name, contrary to the specification.
1569 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1570 restricted to single-key lookups, Exim was not diagnosing an error if
1571 * or *@ was used with a query-style lookup.
1573 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1575 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1576 long ago, but noone interested enough thought of it. Let's just say that
1577 the "1.1" means that there are some new functions that weren't there at
1578 some point in the past.
1580 PH/51 Error processing for expansion failure of helo_data from an smtp
1581 transport during callout processing was broken.
1583 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1584 tested/used via the -bh/-bhc/-bs options.
1586 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1587 bug, fixed in subsequent PCRE releases).
1589 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1590 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1592 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1598 SC/01 Use a glob alias rather than an array ref in eximstats generated
1599 parser. This improves both readability and performance.
1601 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1602 Don't display local sender or destination tables in eximstats unless
1603 there is data to show.
1604 Added average volumes into the eximstats top table text output.
1606 SC/03 Collect data on the number of addresses (recipients) as well
1607 as the number of messages in eximstats.
1609 TF/01 Correct an error in the documentation for the redirect router. Exim
1610 does (usually) call initgroups() when daemonizing.
1612 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1613 with consistent privilege compared to when running as a daemon.
1615 TF/03 Note in the spec that $authenticated_id is not set for local
1616 submissions from trusted users.
1618 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1619 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1621 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1622 by adding some example configuration directives to the default
1623 configuration file. A little bit of work is required to uncomment the
1624 directives and define how usernames and passwords are checked, but
1625 there is now a framework to start from.
1627 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1628 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1629 without this. I don't know how relevant this is to other LDAP libraries.
1631 PH/02 Add the verb name to the "unknown ACL verb" error.
1633 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1635 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1637 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1638 directory not expanded when it should be if an expanded home directory
1639 was set for the address (which is overridden by the transport).
1641 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1644 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1645 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1646 because it is too late at that time, and has no effect.
1648 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1649 security issue with \' (bugzilla #107). I could not use the
1650 PQescapeStringConn() function, because it needs a PGconn value as one of
1653 PH/08 When testing addresses using -bt, indicate those final addresses that
1654 are duplicates that would not cause an additional delivery. At least one
1655 person was confused, thinking that -bt output corresponded to deliveries.
1656 (Suppressing duplicates isn't a good idea as you lose the information
1657 about possibly different redirections that led to the duplicates.)
1659 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1660 systems where poll() doesn't work, in particular OS X.
1662 PH/10 Added more information to debugging output for retry time not reached.
1664 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1665 operations in malware.c.
1667 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1670 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1671 syslog_duplication set false, log lines that would normally be written
1672 both the the main log and to the reject log were not written to syslog at
1675 PH/14 In the default configuration, change the use of "message" in ACL warn
1676 statements to "add_header".
1678 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1679 not followed by a command (e.g. "seen endif").
1681 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1682 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1685 PH/17 Added extra conditions to the default value of delay_warning_condition
1689 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1690 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1691 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1694 The Auto-Submitted: and various List- headers are standardised, whereas I
1695 don't think Precedence: ever was.
1697 PH/18 Refactored debugging code in route_finduser() to show more information,
1698 in particular, the error code if getpwnam() issues one.
1700 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1701 This is apparently needed in addition to the PH/07 change above to avoid
1702 any possible encoding problems.
1704 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1705 but not after initializing Perl.
1707 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1708 output them only if debugging. By default they are written stderr,
1709 apparently, which is not desirable.
1711 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1714 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1717 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1719 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1720 authenticated or an ident call has been made. Suppress the default
1721 values for $authenticated_id and $authenticated_sender (but permit -oMai
1722 and -oMas) when testing with -bh.
1724 PH/24 Re-jigged the order of the tests in the default configuration so that the
1725 tests for valid domains and recipients precede the DNS black list and CSA
1726 tests, on the grounds that those ones are more expensive.
1728 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1729 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1730 This bug exists in every version of Exim that I still have, right back to
1733 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1734 However, an attempt to turn on case-sensitivity in a regex key by
1735 including (?-i) didn't work because the subject string was already
1736 lowercased, and the effects were non-intuitive. It turns out that a
1737 one-line patch can be used to allow (?-i) to work as expected.
1743 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1744 other effects) broke the use of negated acl sub-conditions.
1746 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1749 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1750 "Deny" causes Exim to reject the incoming connection with a 554 error.
1751 Unfortunately, if there is a major crisis, such as a disk failure,
1752 tcp-wrappers gives "deny", whereas what one would like would be some
1753 kind of temporary error. A kludge has been added to help with this.
1754 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1755 554 error is used if errno is still zero or contains ENOENT (which occurs
1756 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1759 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1761 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1762 errors. Otherwise a message that provokes a temporary error (when other
1763 messages do not) can cause a whole host to time out.
1765 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1766 addresses were routed directly to files or pipes from a redirect router.
1767 File deliveries just didn't batch; pipe deliveries might have suffered
1770 PH/06 A failure to get a lock for a hints database would erroneously always say
1771 "Failed to get write lock", even when it was really a read lock.
1773 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1774 of 0600. This has been changed to use the value of the lockfile_mode
1775 option (which defaults to 0600).
1777 PH/08 Applied small patch from the Sieve maintainer.
1779 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1780 folder from quota calculations, a direct delivery into this folder messed
1781 up the contents of the maildirsize file. This was because the regex was
1782 used only to exclude .Trash (or whatever) when the size of the mailbox
1783 was calculated. There was no check that a delivery was happening into an
1784 excluded directory. This bug has been fixed by ignoring all quota
1785 processing for deliveries into excluded directories.
1787 PH/10 Added the maildirfolder_create_regex option to appendfile.
1793 PH/01 The code for finding all the local interface addresses on a FreeBSD
1794 system running IPv6 was broken. This may well have applied to all BSD
1795 systems, as well as to others that have similar system calls. The broken
1796 code found IPv4 interfaces correctly, but gave incorrect values for the
1797 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1798 that it would not match correctly against @[] and not recognize the IPv6
1801 PH/02 The ipliteral router was not recognizing addresses of the form user@
1802 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1804 PH/03 Added disable_ipv6.
1806 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1807 decoded form, because it is most often used to construct To: headers
1808 lines in autoreplies, and the decoded form may well be syntactically
1809 invalid. However, $reply_address has leading white space removed, and all
1810 newlines turned into spaces so that the autoreply transport does not
1813 PH/05 If group was specified without a user on a router, and no group or user
1814 was specified on a transport, the group from the router was ignored.
1816 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1817 for visible compile-time settings that can be used to change these
1818 numbers, for those that want even more. Backwards compatibility with old
1819 spool files has been maintained. However, going back to a previous Exim
1820 release will lost any variables that are in spool files.
1822 PH/07 Two small changes when running in the test harness: increase delay when
1823 passing a TCP/IP connection to a new process, in case the original
1824 process has to generate a bounce, and remove special handling of
1825 127.0.0.2 (sic), which is no longer necessary.
1827 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1828 be the same on different OS.
1830 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1833 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1834 whether --show-vars was specified or not
1836 JJ/02 exipick: Added support for new ACL variable spool format introduced
1839 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1840 syntactically invalid From: or Reply-to: line, and a filter used this to
1841 generate an autoreply, and therefore failed to obtain an address for the
1842 autoreply, Exim could try to deliver to a non-existent relative file
1843 name, causing unrelated and misleading errors. What now happens is that
1844 it logs this as a hard delivery error, but does not attempt to create a
1847 PH/11 The exinext utility has a -C option for testing purposes, but although
1848 the given file was scanned by exinext itself; it wasn't being passed on
1849 when Exim was called.
1851 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1852 an end-of-file indication when reading a command response.
1854 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1855 compiled. In many other places in Exim, IPv6 addresses are always
1856 recognized, so I have changed this. It also means that IPv4 domain
1857 literals of the form [IPV4:n.n.n.n] are now always recognized.
1859 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1860 used if the router is not running as root, for example, when verifying at
1861 ACL time, or when using -bh. The debugging output from this situation was
1862 non-existent - all you got was a failure to exec. I have made two
1865 (a) Failures to set uid/gid, the current directory, or a process leader
1866 in a subprocess such as that created by queryprogram now generate
1867 suitable debugging ouput when -d is set.
1869 (b) The queryprogram router detects when it is not running as root,
1870 outputs suitable debugging information if -d is set, and then runs
1871 the subprocess without attempting to change uid/gid.
1873 PH/15 Minor change to Makefile for building test_host (undocumented testing
1876 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1877 additional section of a DNS packet that returns MX or SRV records.
1878 Instead, it always explicitly searches for A/AAAA records. This avoids
1879 major problems that occur when a DNS server includes only records of one
1880 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1881 fixed another bug: if SRV records were looked up and the corresponding
1882 address records were *not* found in the additional section, the port
1883 values from the SRV records were lost.
1885 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1886 using the correct key (the original address) when searching the retry
1887 rules in order to find which one to use for generating the retry hint.
1889 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1890 adding the default one. Similarly, if it contains a Reply-To: header, the
1891 errors_reply_to option, if set, is not used.
1893 PH/19 When calculating a retry time, Exim used to measure the "time since
1894 failure" by looking at the "first failed" field in the retry record. Now
1895 it does not use this if it is later than than the arrival time of the
1896 message. Instead it uses the arrival time. This makes for better
1897 behaviour in cases where some deliveries succeed, thus re-setting the
1898 "first failed" field. An example is a quota failure for a huge message
1899 when small messages continue to be delivered. Without this change, the
1900 "time since failure" will always be short, possible causing more frequent
1901 delivery attempts for the huge message than are intended.
1902 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1904 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1905 $1, $2, $3) because the numerical variables can be reset during some
1906 expansion items (e.g. "match"), thereby losing the authentication data.
1908 PH/21 Make -bV show the size of off_t variables so that the test suite can
1909 decide whether to run tests for quotas > 2G.
1911 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1912 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1913 filecount value is greater than 2G or if a quota value is greater than 2G
1914 on a system where the size of off_t is not greater than 4, a panic error
1917 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1918 never match. The debug and -bh output now contains an explicit error
1919 message indicating a malformed IPv4 address or mask.
1921 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1922 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1923 PH/23 above applies.
1925 PH/25 Do not write to syslog when running in the test harness. The only
1926 occasion when this arises is a failure to open the main or panic logs
1927 (for which there is an explicit test).
1929 PH/26 Added the /no_tell option to "control=freeze".
1931 PH/27 If a host name lookup failed very early in a connection, for example, if
1932 the IP address matched host_lookup and the reverse lookup yielded a name
1933 that did not have a forward lookup, an error message of the form "no IP
1934 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1935 could be logged. Now it outputs the IP address instead of "NULL".
1937 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1938 allows the sender and the authenticated sender to be set when
1939 submitting a message from within Exim. Since child_open_exim() is
1940 documented for local_scan(), the new function should be too.
1942 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1943 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1944 results in an empty string is now treated as unset.
1946 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1948 PH/31 Added sender_verify_fail logging option.
1950 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1951 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1952 tidied the source and removed it altogether.
1954 PH/33 When a queue run was abandoned because the load average was too high, a
1955 log line was always written; now it is written only if the queue_run log
1956 selector is set. In addition, the log line for abandonment now contains
1957 information about the queue run such as the pid. This is always present
1958 in "start" and "stop" lines but was omitted from the "abandon" line.
1960 PH/34 Omit spaces between a header name and the colon in the error message that
1961 is given when verify = headers_syntax fails (if there are lots of them,
1962 the message gets confusing).
1964 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1965 names, as there are now some PTR records that contain slashes. This check
1966 is only to protect against broken name servers that fall over on strange
1967 characters, so the fact that it applies to all lookups doesn't matter.
1969 PH/36 Now that the new test suite is complete, we can remove some of the
1970 special code in Exim that was needed for the old test suite. For example,
1971 sorting DNS records because real resolvers return them in an arbitrary
1972 order. The new test suite's fake resolver always returns records in the
1975 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1976 bounces) except when queue_only is set, to avoid logging races between
1977 the different processes.
1979 PH/38 Panic-die if .include specifies a non-absolute path.
1981 PH/39 A tweak to the "H" retry rule from its user.
1983 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1984 a label. They prevented compilation on older perls.
1986 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1987 a warning to be raised on newish perls.
1989 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1990 on queue. Changes to match documented behaviour of showing count of
1991 messages matching specified criteria.
1993 PH/40 Changed the default ident timeout from 30s to 5s.
1995 PH/41 Added support for the use of login_cap features, on those BSD systems
1996 that have them, for controlling the resources used by pipe deliveries.
1998 PH/42 The content-scanning code uses fopen() to create files in which to put
1999 message data. Previously it was not paying any attention to the mode of
2000 the files. Exim runs with umask(0) because the rest of the code creates
2001 files with open(), and sets the required mode explicitly. Thus, these
2002 files were ending up world-writeable. This was not a big issue, because,
2003 being within the spool directory, they were not world-accessible. I have
2004 created a function called modefopen, which takes an additional mode
2005 argument. It sets umask(777), creates the file, chmods it to the required
2006 mode, then resets the umask. All the relevant calls to fopen() in the
2007 content scanning code have been changed to use this function.
2009 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2010 to 24 hours. This avoids potential overflow problems when processing G
2011 and H retry rules. I suspect nobody ever tinkers with this value.
2013 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2015 PH/45 When the plaintext authenticator is running as a client, the server's
2016 challenges are checked to ensure they are valid base64 strings. By
2017 default, the authentication attempt is cancelled if an invalid string is
2018 received. Setting client_ignore_invalid_base64 true ignores these errors.
2019 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2020 they are received. Thus, the responses can be made to depend on the
2021 challenges. If an invalid string is ignored, an empty string is placed in
2024 PH/46 Messages that are created by the autoreply transport now contains a
2025 References: header, in accordance with RFCs 2822 and 3834.
2027 PH/47 Added authenticated_sender_force to the smtp transport.
2029 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2031 PH/49 Installed latest patch from the Sieve maintainer.
2033 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2034 was also set, the appendfile transport was unnecessarily scanning a
2035 directory of message files (e.g. for maildir delivery) to find the count
2036 of files (along with the size), even though it did not need this
2037 information. It now does the scan only if it needs to find either the
2038 size of the count of files.
2040 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2042 PH/52 Two bugs concerned with error handling when the smtp transport is
2045 (i) Exim was not creating retry information for temporary errors given
2046 for individual recipients after the DATA command when the smtp transport
2047 was used in LMTP mode. This meant that they could be retried too
2048 frequently, and not timed out correctly.
2050 (ii) Exim was setting the flag that allows error details to be returned
2051 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2052 recipients that were returned after the DATA command.
2054 PH/53 This is related to PH/52, but is more general: for any failing address,
2055 when detailed error information was permitted to be returned to the
2056 sender, but the error was temporary, then after the final timeout, only
2057 "retry timeout exceeded" was returned. Now it returns the full error as
2058 well as "retry timeout exceeded".
2060 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2061 do this, and (what is worse) MTAs that accept it.
2063 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2064 will now be deprecated.
2066 PH/56 New os.c-cygwin from the Cygwin maintainer.
2068 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2069 formats (previously only available in exim formats via -bpr, -bpru,
2070 and -bpra. Now also available in native and exiqgrep formats)
2072 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2073 with very large, slow to parse queues
2075 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2077 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2079 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2080 responses to authentication challenges, though it was showing the
2081 challenges; (ii) I've removed the CR characters from the debug output for
2084 PH/58 Allow for the insertion of a newline as well as a space when a string
2085 is turned into more than one encoded-word during RFC 2047 encoding. The
2086 Sieve code now uses this.
2088 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2089 data_4xx, lost_connection, tls_required.
2091 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2092 message was being sent as an SMTP response.
2094 PH/61 Add -l and -k options to exicyclog.
2096 PH/62 When verifying, if an address was redirected to one new address, so that
2097 verification continued, and the new address failed or deferred after
2098 having set something in $address_data, the value of $address_data was not
2099 passed back to the ACL. This was different to the case when no
2100 redirection occurred. The value is now passed back in both cases.
2102 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2103 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2104 use login_cap.h, so on its own it isn't the distinguishing feature. The
2105 new name refers directly to the setclassresources() function.
2107 PH/65 Added configuration files for NetBSD3.
2109 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2111 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2112 is preferred over IPv4.
2114 PH/68 The bounce_return_message and bounce_return_body options were not being
2115 honoured for bounces generated during the reception of non-SMTP messages.
2116 In particular, this applied to messages rejected by the ACL. This bug has
2117 been fixed. However, if bounce_return_message is true and bounce_return_
2118 body is false, the headers that are returned for a non-SMTP message
2119 include only those that have been read before the error was detected.
2120 (In the case of an ACL rejection, they have all been read.)
2122 PH/69 The HTML version of the specification is now built in a directory called
2123 spec_html instead of spec.html, because the latter looks like a path with
2124 a MIME-type, and this confuses some software.
2126 PH/70 Catch two compiler warnings in sieve.c.
2128 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2129 function verify_get_ident() calls ip_connect() to connect a socket, but
2130 if the "connect()" function timed out, ip_connect() used to close the
2131 socket. However, verify_get_ident() also closes the socket later, and in
2132 between Exim writes to the log, which may get opened at this point. When
2133 the socket was closed in ip_connect(), the log could get the same file
2134 descriptor number as the socket. This naturally causes chaos. The fix is
2135 not to close the socket in ip_connect(); the socket should be closed by
2136 the function that creates it. There was only one place in the code where
2137 this was missing, in the iplookup router, which I don't think anybody now
2138 uses, but I've fixed it anyway.
2140 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2141 well as to direct DNS lookups. Otherwise the handling of names in host
2142 lists is inconsistent and therefore confusing.
2148 PH/01 Two changes to the default runtime configuration:
2150 (1) Move the checks for relay_from_hosts and authenticated clients from
2151 after to before the (commented out) DNS black list checks.
2153 (2) Add control=submission to the relay_from_hosts and authenticated
2154 clients checks, on the grounds that messages accepted by these
2155 statements are most likely to be submissions.
2157 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2159 (1) Generate an error if the third argument for the ${prvs expansion is
2162 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2165 (3) Reset the variables that are obtained from the first argument of
2166 ${prvscheck and used in the second argument before leaving the code,
2167 because their memory is reclaimed, so using them afterwards may do
2170 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2171 one (it's much easier than Tom thought :-).
2173 (5) Because of (4), we can now allow for the use of $prvscheck_result
2174 inside the third argument.
2176 PH/03 For some reason, the default setting of PATH when running a command from
2177 a pipe transport was just "/usr/bin". I have changed it to
2180 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2181 anything to be listed in the output from -bV.
2183 PH/05 When a filter generated an autoreply, the entire To: header line was
2184 quoted in the delivery log line, like this:
2186 => >A.N.Other <ano@some.domain> <original@ddress> ...
2188 This has been changed so that it extracts the operative address. There
2189 may be more than one such address. If so, they are comma-separated, like
2192 => >ano@some.domain,ona@other.domain <original@ddress> ...
2194 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2195 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2196 not being looked up in the rDNS to get a host name, Exim was showing the
2197 IP address twice in Received: lines, even though the IP addresses were
2198 identical. For example:
2200 Received: from [1.2.3.4] (helo=[1.2.3.4])
2202 However, if the real host name was known, it was omitting the HELO data
2203 if it matched the actual IP address. This has been tidied up so that it
2204 doesn't show the same IP address twice.
2206 PH/07 When both +timestamp and +memory debugging was on, the value given by
2207 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2208 called by the debug printing, thereby overwriting the timestamp buffer.
2209 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2211 PH/08 When the original message was included in an autoreply transport, it
2212 always said "this is a copy of the message, including all the headers",
2213 even if body_only or headers_only was set. It now gives an appropriate
2216 PH/09 Applied a patch from the Sieve maintainer which:
2218 o fixes some comments
2219 o adds the (disabled) notify extension core
2220 o adds some debug output for the result of if/elsif tests
2221 o points to the current vacation draft in the documentation
2222 and documents the missing references header update
2226 o fixes a bug in processing the envelope test (when testing
2227 multiple envelope elements, the last element determinted the
2230 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2231 Electronic Mail") by including:
2233 Auto-submitted: auto-generated
2235 in the messages that it generates (bounce messages and others, such as
2236 warnings). In the case of bounce messages for non-SMTP mesages, there was
2237 also a typo: it was using "Auto_submitted" (underscore instead of
2238 hyphen). Since every message generated by Exim is necessarily in response
2239 to another message, thes have all been changed to:
2241 Auto-Submitted: auto-replied
2243 in accordance with these statements in the RFC:
2245 The auto-replied keyword:
2247 - SHOULD be used on messages sent in direct response to another
2248 message by an automatic process,
2250 - MUST NOT be used on manually-generated messages,
2252 - MAY be used on Delivery Status Notifications (DSNs) and Message
2253 Disposition Notifications (MDNs),
2255 - MUST NOT be used on messages generated by automatic or periodic
2256 processes, except for messages which are automatic responses to
2259 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2260 to the default Received: header definition.
2262 PH/12 Added log selector acl_warn_skipped (default on).
2264 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2265 variables because (a) they are in the wrong storage pool and (b) even if
2266 they were copied, it wouldn't work properly because of the caching.
2268 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2269 checking when decoding. Apparently there are clients that generate
2270 overlong encoded strings. Why am I not surprised?
2272 PH/15 If the first argument of "${if match_address" was not empty, but did not
2273 contain an "@" character, Exim crashed. Now it writes a panic log message
2274 and treats the condition as false.
2276 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2278 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2279 extension "envelope-auth". The code is finished and in agreement with
2280 other implementations, but there is no documentation so far and in fact,
2281 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2282 not changing the active code.
2284 Print executed "if" and "elsif" statements when debugging is used. This
2285 helps a great deal to understand what a filter does.
2287 Document more things not specified clearly in RFC3028. I had all this
2288 sorted out, when out of a sudden new issues came to my mind. Oops."
2290 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2293 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2294 canonical form (as documented). However, after a host name lookup from
2295 the IP address, check_host() was doing a simple string comparison with
2296 addresses acquired from the DNS when checking that the found name did
2297 have the original IP as one of its addresses. Since any found IPv6
2298 addresses are likely to be in abbreviated form, the comparison could
2299 fail. Luckily, there already exists a function for doing the comparison
2300 by converting both addresses to binary, so now that is used instead of
2301 the text comparison.
2303 PH/20 There was another similar case to PH/19, when a complete host name was
2304 given in a host list; looking up its IP address could give an abbreviated
2305 form, whereas the current host's name might or might not be abbreviated.
2306 The same fix has been applied.
2312 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2313 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2316 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2317 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2319 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2321 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2322 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2323 Also, for "Auto-Submitted", treat anything other than "no" as
2324 non-personal, in accordance with RFC 3834. (Previously it treated
2325 anything starting "auto-" as non-personal.)
2327 TF/01 The control=submission/name=... option had a problem with syntax
2328 errors if the name included a slash character. The /name= option
2329 now slurps the rest of the string, so it can include any characters
2330 but it must come last in the list of options (after /sender_retain
2333 PH/05 Some modifications to the interface to the fake nameserver for the new
2341 TK/01 Added the "success_on_redirect" address verification option. See
2342 NewStuff for rationale and an example.
2344 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2346 PH/02 Patch to exigrep to allow it to work on syslog lines.
2348 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2349 fread() to skip over the body file's header line, because in Cygwin the
2350 header line is locked and is inaccessible.
2352 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2353 co-exist for some time) to make it clear that it is the Exim ID that is
2354 referenced, not the Message-ID: header line.
2356 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2357 string_format() function, because snprintf() does not exist on all
2360 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2361 ${stat: expansion item.
2363 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2364 protocol synchronization error", to keep the pedants happy.
2366 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2367 well as for IRIX systems, when gcc is being used. See the host.c source
2370 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2372 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2375 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2376 transport and to the smtp transport in LMTP mode.
2378 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2380 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2381 run a filter in a subprocess. This could lead to confusion in subsequent
2382 lookups in the parent process. There should also be a search_tidyup() at
2383 the end of the subprocess.
2385 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2386 only if the host matched helo_try_verify_hosts, which caused the
2387 verification to occur when the EHLO/HELO command was issued. The ACL just
2388 tested the remembered result. Now, if a previous verification attempt has
2389 not happened, "verify = helo" does it there and then.
2391 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2393 TK/03 Fix log output including CR from clamd.
2395 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2396 exist provoked a memory error which could cause a segfault.
2398 PH/15 Installed PCRE 6.2
2400 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2402 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2403 of the problem. Specifically, suggested +O2 rather than +O1 for the
2406 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2408 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2409 record, the port was not correctly logged when the outgoing_port log
2410 selector was set (it logged the transort's default port).
2412 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2413 fallback_hosts, and "hosts" in the smtp transport.
2415 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2416 host errors such as "Connection refused".
2418 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2419 authentication with radiusclient 0.4.9:
2421 - Error returned from rc_read_config was caught wrongly
2422 - Username/password not passed on to radius server due to wrong length.
2424 The presumption is that some radiusclient API changes for 4.51/PH/17
2425 were not taken care of correctly. The code is still untested by me (my
2426 Linux distribution still has 0.3.2 of radiusclient), but it was
2427 contributed by a Radius user.
2429 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2430 expanding the "port" option of the smtp transport.
2432 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2433 while reading a MIME header. Thanks to Tom Hughes for a patch.
2435 PH/24 Include config.h inside local_scan.h so that configuration settings are
2438 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2439 that in an ACL for RCPT (for example), you can examine exactly what was
2442 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2443 commands, but it was not correctly comparing the address with the actual
2444 client host address. Thus, it would show the EHLO address in Received:
2445 header lines when this was not necessary.
2447 PH/27 Added the % operator to ${eval:}.
2449 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2450 it should be ignoring failures (because with -C, for example, it has lost
2451 privilege). It wasn't ignoring creation failures other than "already
2454 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2457 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2458 because an input line was too long, either on its own, or by virtue of
2459 too many continuations, the temporary file was not being removed, and the
2460 return code was incorrect.
2462 PH/31 Missing "BOOL" in function definition in filtertest.c.
2464 PH/32 Applied Sieve patches from the maintainer.
2466 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2468 PH/33 Added "verify = not_blind".
2470 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2471 Local/Makefile (with some defaults set). These are used in built scripts
2472 such as exicyclog, but they have never been used in the exim_install
2473 script (though there are many overriding facilities there). I have
2474 arranged that the exim_install script now takes note of these two
2477 PH/35 Installed configuration files for Dragonfly.
2479 PH/36 When a locally submitted message by a trusted user did not contain a
2480 From: header, and the sender address was obtained from -f or from an SMTP
2481 MAIL command, and the trusted user did not use -F to supply a sender
2482 name, $originator_name was incorrectly used when constructing a From:
2483 header. Furthermore, $originator_name was used for submission mode
2484 messages from external hosts without From: headers in a similar way,
2485 which is clearly wrong.
2487 PH/37 Added control=suppress_local_fixups.
2489 PH/38 When log_selector = +received_sender was set, and the addition of the
2490 sender made the log line's construction buffer exactly full, or one byte
2491 less than full, an overflow happened when the terminating "\n" was
2494 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2495 when the result of a list match is failure because a DNS lookup failed.
2497 PH/40 RM_COMMAND is now used in the building process.
2499 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2500 the "build-* directories that it finds.
2502 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2503 address in a domain literal was a prefix of an interface address.
2505 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2506 when verifying a sender address, unless rewrite_headers is false.
2508 PH/44 Wrote a long comment about why errors_to addresses are verified as
2509 recipients, not senders.
2511 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2512 the ratelimit ACL was added.
2514 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2516 PH/46 Added extra information about PostgreSQL errors to the error string.
2518 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2519 avoiding the need to install special zones in a real server. This is
2520 backwards compatible; if it can't find the fake resolver, it drops back.
2521 Thus, both old and new test suites can be run.
2523 TF/02 Added util/ratelimit.pl
2525 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2526 clock is set back in time.
2528 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2529 Candler <B.Candler@pobox.com>.
2531 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2532 OK for addresses that are the result of redirections.
2534 PH/48 A number of further additions for the benefit of the new test suite,
2535 including a fake gethostbyname() that interfaces to the fake DNS resolver
2538 TF/06 The fix for widen_domains has also been applied to qualify_single and
2539 search_parents which are the other dnslookup options that can cause
2542 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2545 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2547 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2548 service" if it encountered an MX record with an empty target hostname.
2549 The message is now "an MX or SRV record indicated no SMTP service".
2551 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2552 if the DNS of the sending site is misconfigured. This is quite a
2553 common situation. This change restores the behaviour of treating a
2554 helo verification defer as a failure.
2556 PH/51 If self=fail was set on a router, the bounce message did not include the
2557 actual error message.
2563 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2565 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2566 command itself ended in error, the underlying message about the transport
2567 filter timeout was being overwritten with the pipe command error. Now the
2568 underlying error message should be appended to the second error message.
2570 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2572 PH/02 Reduce the amount of output that "make" produces by default. Full output
2573 can still be requested.
2575 PH/03 The warning log line about a condition test deferring for a "warn" verb
2576 was being output only once per connection, rather than after each
2577 occurrence (because it was using the same function as for successful
2578 "warn" verbs). This seems wrong, so I have changed it.
2580 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2581 it should not have, which might have caused a crash in the right
2582 circumstances, but probably never did.
2584 PH/04 Installed a modified version of Tony Finch's patch to make submission
2585 mode fix the return path as well as the Sender: header line, and to
2586 add a /name= option so that you can make the user's friendly name appear
2589 TF/03 Added the control = fakedefer ACL modifier.
2591 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2592 Mark Lowes for thorough testing.
2594 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2596 TK/03 Merged latest SRS patch from Miles Wilton.
2598 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2599 with the definition in sysexits.h (which is #included earlier).
2600 Fortunately, Exim does not actually use EX_OK. The code used to try to
2601 preserve the sysexits.h value, by assumimg that macro definitions were
2602 scanned for macro replacements. I have been disabused of this notion,
2603 so now the code just undefines EX_OK before #including unistd.h.
2605 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2606 in the smtp transport. When a block could not be written in a single
2607 write() function, the timeout was being re-applied to each part-write.
2608 This seems wrong - if the receiver was accepting one byte at a time it
2609 would take for ever. The timeout is now adjusted when this happens. It
2610 doesn't have to be particularly precise.
2612 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2613 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2615 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2616 without a domain if the check to <postmaster@domain> fails.
2618 SC/01 Eximstats: added -xls and the ability to specify output files
2619 (patch written by Frank Heydlauf).
2621 SC/02 Eximstats: use FileHandles for outputing results.
2623 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2625 SC/04 Eximstats: fixed display of large numbers with -nvr option
2627 SC/05 Eximstats: fixed merging of reports with empty tables.
2629 SC/06 Eximstats: added the -include_original_destination flag
2631 SC/07 Eximstats: removed tabs and trailing whitespace.
2633 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2635 TK/06 MBOX spool code: Add real "From " MBOX separator line
2636 so the .eml file is really in mbox format (even though
2637 most programs do not really care). Patch from Alex Miller.
2639 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2640 The latter is generated from $received_to and is only set if the
2641 message has one envelope recipient. SA can use these headers,
2642 obviously out-of-the-box. Patch from Alex Miller.
2644 PH/08 The ${def test on a variable was returning false if the variable's
2645 value was "0", contrary to what the specification has always said!
2646 The result should be true unless the variable is empty.
2648 PH/09 The syntax error of a character other than { following "${if
2649 def:variable_name" (after optional whitespace) was not being diagnosed.
2650 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2651 accidental colon was present, for example, could give incorrect results.
2653 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2654 result is used (not including appendfile, where other changes are about
2657 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2658 This involved changing a lot of size variables from int to off_t. It
2659 should work with maildirs and everything.
2661 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2662 spamd dying while we are connected to it.
2664 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2667 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2668 function for BDB 4.3.
2670 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2672 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2673 the sources for PCRE have been re-arranged and more files are now
2676 PH/15 The code I had for printing potentially long long variables in PH/11
2677 above was not the best (it lost precision). The length of off_t variables
2678 is now inspected at build time, and an appropriate printing format (%ld
2679 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2680 to be "long long int" or "long int". This is needed for the internal
2681 formatting function string_vformat().
2683 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2684 the configuration file to be ":syslog", then the script "guesses" where
2685 the logs files are, rather than using the compiled in default. In our
2686 case the guess is not the same as the compiled default, so the script
2687 suddenly stopped working when I started to use syslog. The patch checks
2688 to see if log_file_path is "". If so, it attempts to read it from exim
2689 with no configuration file to get the compiled in version, before it
2690 falls back to the previous guessing code."
2692 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2693 implementing BATV in an Exim configuration. See NewStuff for the gory
2696 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2697 Makefile that are specific to HP-UX.
2699 PH/18 If the "use_postmaster" option was set for a recipient callout together
2700 with the "random" option, the postmaster address was used as the MAIL
2701 FROM address for the random test, but not for the subsequent recipient
2702 test. It is now used for both.
2704 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2705 patch removes a few documentation additions to RFC 3028, because the
2706 latest draft now contains them. It adds the new en;ascii-case comparator
2707 and a new error check for 8bit text in MIME parts. Comparator and
2708 require names are now matched exactly. I enabled the subaddress
2709 extension, but it is not well tested yet (read: it works for me)."
2711 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2712 rework some of the code of TK/09 above to avoid the hardwired use of
2713 "%lld" and "long long". Replaced the call to snprintf() with a call to
2716 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2717 records point to non-existent hosts", "retry timeout exceeded", and
2718 "retry time not reached for any host after a long failure period".
2720 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2721 experimental DomainKeys support:
2723 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2724 (2) On an error such as an illegally used "control", the wrong name for
2725 the control was given.
2727 These problems did NOT occur unless DomainKeys support was compiled.
2729 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2731 PH/24 Added ${if match_ip condition.
2733 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2734 databases so that it will be absolutely obvious if a crash occurs in the
2735 DB library. This is a regular occurrence (often caused by mis-matched
2738 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2739 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2740 picked up on a user's system that detects such things. There doesn't seem
2741 to be a gcc warning option for this - only an attribute that has to be
2742 put on the function's prototype. It seems that in Fedora Core 4 they have
2743 set this on a number of new functions. No doubt there will be more in due
2746 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2747 specify a transport. However, if an address that was verified by such a
2748 router was the subject of a callout, Exim crashed because it tried to
2749 read the rcpt_include_affixes from the non-existent transport. Now it
2750 just assumes that the setting of that option is false. This bug was
2751 introduced by 4.51/PH/31.
2753 PH/28 Changed -d+all to exclude +memory, because that information is very
2754 rarely of interest, but it makes the output a lot bigger. People tend to
2755 do -d+all out of habit.
2757 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2758 code in os-type was giving problems when libc.so lives in lib64, like on
2761 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2762 aren't the modern standard, and it seems that some systems' include files
2763 don't always have them. Exim was already checking for some of the newer
2764 ones like T_AAAA, and defining it itself. I've added checks for all the
2765 record types that Exim uses.
2767 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2768 not automatically generating a new one, as it is supposed to. This
2769 prevented TLS from working. If the file did exist, but contained invalid
2770 data, a new version was generated, as expected. It was only the case of a
2771 non-existent file that was broken.
2773 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2774 with a change in libdomainkeys > 0.64.
2776 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2777 from DNS. If the selector record carries the flag, it now has
2778 precedence over the domain-wide flag.
2780 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2782 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2783 the use of a port name that isn't defined in /etc/services) occurred, the
2784 message was deferred as in a normal delivery, and thus remained on the
2785 spool, instead of being failed because of the mua_wrapper setting. This
2786 is now fixed, and I tidied up some of the mua_wrapper messages at the
2789 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2790 the messages in a hash of arrays rather than using individual hashes.
2791 This is a bit cleaner and results in dramatic memory savings, albeit
2792 at a slight CPU cost.
2794 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2795 as requested by Marc Sherman.
2797 SC/10 Eximstats: added histograms for user specified patterns as requested
2800 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2802 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2803 fopen() in the content-scanning modules that did not already have it.
2809 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2810 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2812 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2814 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2816 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2817 to test Sieve filters that use "vacation".
2819 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2820 that changes the way the GnuTLS parameters are stored in the cache file.
2821 The new format can be generated externally. For backward compatibility,
2822 if the data in the cache doesn't make sense, Exim assumes it has read an
2823 old-format file, and it generates new data and writes a new file. This
2824 means that you can't go back to an older release without removing the
2827 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2828 work if there are any delivery delays because "one_time" forces the
2829 parent to be marked "delivered", so its unseen clone is never tried
2830 again. For this reason, Exim now forbids the simultaneous setting of
2833 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2834 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2835 entry if you want to know the details. The fix, however, neglected to
2836 consider the case when local delivery batching is involved. The test for
2837 "previously delivered" was not happening when checking to see if an
2838 address could be batched with a previous (undelivered) one; under
2839 certain circumstances this could lead to multiple deliveries to the same
2842 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2843 in its include files, and this causes problems building Exim.
2845 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2846 header_syntax) but Exim was just ignoring anything given after a slash.
2847 In particular, this caused confusion with an attempt to use "verify =
2848 reverse_host_lookup/defer_ok". An error is now given when options are
2849 supplied for verify items that do not have them. (Maybe reverse_host_
2850 lookup should have a defer_ok option, but that's a different point.)
2852 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2853 defined by RFC 821) to 2048, because there were problems with some AUTH
2854 commands, and RFC 1869 says the size should be increased for extended
2855 SMTP commands that take arguments.
2857 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2860 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2861 "unknown" error; now it says that the functionality isn't in the binary.
2863 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2864 an address' error message when a string expansion fails (syntax or
2865 whatever). Otherwise the password may appear in the log. Following change
2866 PH/42 below, there is no longer a chance of it appearing in a bounce
2869 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2871 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2872 of its addresses was ever tried. (Bugzilla bug #2.)
2874 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2875 the result incorrectly in the debug output. (It correctly added a newline
2876 to what was transported.)
2878 TF/01 Added $received_time.
2880 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2881 commented out examples of how to interface to a virus scanner and to
2882 SpamAssassin. Also added commented examples of av_scanner and
2883 spamd_address settings.
2885 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2886 and controls are allowed in which ACLs. There were a couple of minor
2887 errors. Some of the entries in the conditions table (which is a table of
2888 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2889 negation of where the condition IS allowed.
2891 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2893 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2894 header file does not have a version number, so I've had to invent a new
2895 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2896 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2897 radiusclient), but it was contributed by a Radius user.
2899 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2900 files or directories, for OpenSSL.
2902 PH/19 When an Exim process that is running as root has to create an Exim log
2903 file, it does so in a subprocess that runs as exim:exim so as to get the
2904 ownership right at creation (otherwise, other Exim processes might see
2905 the file with the wrong ownership). There was no test for failure of this
2906 fork() call, which would lead to the process getting stuck as it waited
2907 for a non-existent subprocess. Forks do occasionally fail when resources
2908 run out. I reviewed all the other calls to fork(); they all seem to check
2911 PH/20 When checking for unexpected SMTP input at connect time (before writing
2912 the banner), Exim was not dealing correctly with a non-positive return
2913 from the read() function. If the client had disconnected by this time,
2914 the result was a log entry for a synchronization error with an empty
2915 string after "input=" when read() returned zero. If read() returned -1
2916 (an event I could not check), uninitialized data bytes were printed.
2917 There were reports of junk text (parts of files, etc) appearing after
2920 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2922 PH/22 Added support for macro redefinition, and (re)definition in between
2923 driver and ACL definitions.
2925 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2926 forgetting to use the resulting value; it was using the unexpanded value.
2928 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2929 hadn't been configured. The fix is from Juergen Kreileder, who
2930 understands it better than I do:
2932 "Here's what I see happening with three configured cyrus_sasl
2933 authenticators configured (plain, login, cram-md5):
2935 On startup auth_cyrus_sasl_init() gets called for each of these.
2936 This means three calls to sasl_listmech() without a specified mech_list.
2937 => SASL tests which mechs of all available mechs actually work
2938 => three warnings about OTP not working
2939 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2941 With the patch, sasl_listmech() also gets called three times. But now
2942 SASL's mech_list option is set to the server_mech specified in the the
2943 authenticator. Or in other words, the answer from sasl_listmech()
2944 gets limited to just the mech you're testing for (which is different
2946 => the return list contains just 'plain' or 'login', 'cram-md5' or
2947 nothing depending on the value of ob->server_mech.
2949 I've just tested the patch: Authentication still works fine,
2950 unavailable mechs specified in the exim configuration are still
2951 caught, and the auth.log warnings about OTP are gone."
2953 PH/25 When debugging is enabled, the contents of the command line are added
2954 to the debugging output, even when log_selector=+arguments is not
2957 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2958 answer is "GNU", and only if the return is "GNU/something" is the answer
2961 PH/27 $acl_verify_message is now set immediately after the failure of a
2962 verification in an ACL, and so is available in subsequent modifiers. In
2963 particular, the message can be preserved by coding like this:
2965 warn !verify = sender
2966 set acl_m0 = $acl_verify_message
2968 Previously, $acl_verify_message was set only while expanding "message"
2969 and "log_message" when a very denied access.
2971 PH/28 Modified OS/os.c-Linux with
2973 -#ifndef OS_LOAD_AVERAGE
2974 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2976 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2977 nomenclature these days.)
2979 PH/29 Installed patch from the Sieve maintainer that adds the options
2980 sieve_useraddress and sieve_subaddress to the redirect router.
2982 PH/30 In these circumstances:
2983 . Two addresses routed to the same list of hosts;
2984 . First host does not offer TLS;
2985 . First host accepts first address;
2986 . First host gives temporary error to second address;
2987 . Second host offers TLS and a TLS session is established;
2988 . Second host accepts second address.
2989 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2990 and peerdn, if requested) that were in fact used only for the second
2993 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2994 attention to any local part prefix or suffix that was matched by the
2995 router that accepted the address. It now behaves in the same way as it
2996 does for delivery: the affixes are removed from the local part unless
2997 rcpt_include_affixes is set on the transport.
2999 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3000 timeout during the DATA phase of an incoming message.
3002 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3003 applied a patch sanctioned by the Sieve maintainer.
3005 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3006 the uid or gid is negative. A case of a negative gid caused this to be
3007 noticed. The fix allows for either to be negative.
3009 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3010 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3013 PH/36 The change PH/12 above was broken. Fixed it.
3015 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3016 the grounds that routing the same address twice would always produce the
3017 same answer. This might have been true once, but it is certainly no
3018 longer true now. Routing a child address may depend on the previous
3019 routing that produced that child. Some complicated redirection strategies
3020 went wrong when messages had multiple recipients, and made Exim's
3021 behaviour dependent on the order in which the addresses were given.
3023 I have moved the duplicate checking until after the routing is complete.
3024 Exim scans the addresses that are assigned to local and remote
3025 transports, and removes any duplicates. This means that more work will be
3026 done, as duplicates will always all be routed, but duplicates are
3027 presumably rare, so I don't expect this is of any significance.
3029 For deliveries to pipes, files, and autoreplies, the duplicate checking
3030 still happens during the routing process, since they are not going to be
3033 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3034 It corrects a timeout issue with spamd. This is Ian's comment: "The
3035 background is that sometimes spamd either never reads data from a
3036 connection it has accepted, or it never writes response data. The exiscan
3037 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3038 blindly assumes that writes won't block so it may never time out."
3040 PH/39 Allow G after quota size as well as K and M.
3042 PH/40 The value set for $authenticated_id in an authenticator may not contain
3043 binary zeroes or newlines because the value is written to log lines and
3044 to spool files. There was no check on this. Now the value is run through
3045 the string_printing() function so that such characters are converted to
3046 printable escape sequences.
3048 PH/41 $message_linecount is a new variable that contains the total number of
3049 lines in the message. Compare $body_linecount, which is the count for the
3052 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3053 bounce and delay warning messages, except in certain special cases, which
3056 (a) An SMTP error message from a remote host;
3057 (b) A message specified in a :fail: redirection;
3058 (c) A message specified in a "fail" command in a system filter;
3059 (d) A message specified in a FAIL return from the queryprogram router;
3060 (e) A message specified by the cannot_route_message router option.
3062 In these cases only, Exim does include the error details in bounce and
3063 warning messages. There are also a few cases where bland messages such
3064 as "unrouteable address" or "local delivery error" are given.
3066 PH/43 $value is now also set for the "else" part of a ${run expansion.
3068 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3069 being worked on, but at least Exim now implements the latest version to
3072 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3073 process to complete was treated as a delivery failure, a timeout while
3074 writing the message to the pipe was logged, but erroneously treated as a
3075 successful delivery. Such timeouts include transport filter timeouts. For
3076 consistency with the overall process timeout, these timeouts are now
3077 treated as errors, giving rise to delivery failures by default. However,
3078 there is now a new Boolean option for the pipe transport called
3079 timeout_defer, which, if set TRUE, converts the failures into defers for
3080 both kinds of timeout. A transport filter timeout is now identified in
3083 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3084 systems where "make" and "gmake" are different, calling "gmake" at top
3085 level broke things. I've arranged for the value of $(MAKE) to be passed
3086 from the Makefile to this script so that it can call the same version of
3090 A note about Exim versions 4.44 and 4.50
3091 ----------------------------------------
3093 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3094 changes of various kinds. As a consequence, a big documentation update was
3095 needed. This delayed the release for rather longer than seemed good, especially
3096 in the light of a couple of (minor) security issues. Therefore, the changes
3097 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3098 release. So 4.44 and 4.50 are in effect two different branches that both start
3101 I have left the 4.50 change log unchanged; it contains all the changes since
3102 4.43. The change log for 4.44 is below; many of its items are identical to
3103 those for 4.50. This seems to be the most sensible way to preserve the
3104 historical information.
3110 1. Minor wording change to the doc/README.SIEVE file.
3112 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3113 computation of the current number of files was incorrect.
3115 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3116 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3119 4. Give more explanation in the error message when the command for a transport
3120 filter fails to execute.
3122 5. There are several places where Exim runs a non-Exim command in a
3123 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3124 was being done only for the command run by the queryprogram router. It is
3125 now done for all such subprocesses. The other cases are: ${run, transport
3126 filters, and the commands run by the lmtp and pipe transports.
3128 6. Added CONFIGURE_GROUP build-time option.
3130 7. Some older OS have a limit of 256 on the maximum number of file
3131 descriptors. Exim was using setrlimit() to set 1000 as a large value
3132 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3133 systems. I've change it so that if it can't get 1000, it tries for 256.
3135 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3136 was an oversight, and furthermore, ever since the addition of extra
3137 controls (e.g. 4.43/32), the checks on when to allow different forms of
3138 "control" were broken. There should now be diagnostics for all cases when a
3139 control that does not make sense is encountered.
3141 9. Added the /retain_sender option to "control=submission".
3143 10. $recipients is now available in the predata ACL (oversight).
3145 11. Tidy the search cache before the fork to do a delivery from a message
3146 received from the command line. Otherwise the child will trigger a lookup
3147 failure and thereby defer the delivery if it tries to use (for example) a
3148 cached ldap connection that the parent has called unbind on.
3150 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3151 of $address_data from the recipient verification was clobbered by the
3152 sender verification.
3154 13. The value of address_data from a sender verification is now available in
3155 $sender_address_data in subsequent conditions in the ACL statement.
3157 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3159 15. Added a new option "connect=<time>" to callout options, to set a different
3162 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3163 was its contents. (It was OK if the option was not defined at all.)
3165 17. A "Completed" log line is now written for messages that are removed from
3166 the spool by the -Mrm option.
3168 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3169 information about exactly what failed.
3171 19. Added -dd to debug only the daemon process.
3173 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3174 handles timeouts, both on the server side and network timeouts. Renamed the
3175 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3177 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3178 It is now set to "smtps".
3180 22. $host_address is now set to the target address during the checking of
3181 ignore_target_hosts.
3183 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3184 being passed; this would have caused $sender_host_name to have been used if
3185 matching the list had actually called for a host name (not very likely,
3186 since this list is usually IP addresses). A host name is now passed as
3189 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3190 code that specifies a non-restarting handler (typically sigaction() in
3191 modern systems) in an attempt to fix a rare and obscure crash bug.
3193 25. Narrowed the window for a race in the daemon that could cause it to ignore
3194 SIGCHLD signals. This is not a major problem, because they are used only to
3195 wake it up if nothing else does.
3197 26. A malformed maildirsize file could cause Exim to calculate negative values
3198 for the mailbox size or file count. Odd effects could occur as a result.
3199 The maildirsize information is now recalculated if the size or filecount
3202 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3203 support for a long time. Removed HAVE_SYS_VFS_H.
3205 28. Installed the latest version of exipick from John Jetmore.
3207 29. In an address list, if the pattern was not a regular expression, an empty
3208 subject address (from a bounce message) matched only if the pattern was an
3209 empty string. Non-empty patterns were not even tested. This was the wrong
3210 because it is perfectly reasonable to use an empty address as part of a
3211 database query. An empty address is now tested by patterns that are
3212 lookups. However, all the other forms of pattern expect the subject to
3213 contain a local part and a domain, and therefore, for them, an empty
3214 address still always fails if the pattern is not itself empty.
3216 30. Exim went into a mad DNS loop when attempting to do a callout where the
3217 host was specified on an smtp transport, and looking it up yielded more
3218 than one IP address.
3220 31. Re-factored the code for checking spool and log partition space into a
3221 function that finds that data and another that does the check. The former
3222 is then used to implement four new variables: $spool_space, $log_space,
3223 $spool_inodes, and $log_inodes.
3225 32. The RFC2047 encoding function was originally intended for short strings
3226 such as real names; it was not keeping to the 75-character limit for
3227 encoded words that the RFC imposes. It now respects the limit, and
3228 generates multiple encoded words if necessary. To be on the safe side, I
3229 have increased the buffer size for the ${rfc2047: expansion operator from
3232 33. It is now permitted to omit both strings after an "if" condition; if the
3233 condition is true, the result is "true". As before, when the second string
3234 is omitted, a false condition yields an empty string. This makes it less
3235 cumbersome to write custom ACL and router conditions.
3237 34. Failure to deliver a bounce message always caused it to be frozen, even if
3238 there was an errors_to setting on the router. The errors_to setting is now
3241 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3242 canonical form (fully expanded) before being placed in
3243 $sender_host_address.
3245 36. The table in the code that translates DNS record types into text (T_A to
3246 "A" for instance) was missing entries for NS and CNAME. It is just possible
3247 that this could have caused confusion if both these types were looked up
3248 for the same domain, because the text type is used as part of Exim's
3249 per-process caching. But the chance of anyone hitting this buglet seems
3252 37. The dnsdb lookup has been extended in a number of ways.
3254 (1) There is a new type, "zns", which walks up the domain tree until it
3255 finds some nameserver records. It should be used with care.
3257 (2) There is a new type, "mxh", which is like "mx" except that it returns
3258 just the host names, not the priorities.
3260 (3) It is now possible to give a list of domains (or IP addresses) to be
3261 looked up. The behaviour when one of the lookups defers can be
3262 controlled by a keyword.
3264 (4) It is now possible to specify the separator character for use when
3265 multiple records are returned.
3267 38. The dnslists ACL condition has been extended: it is now possible to supply
3268 a list of IP addresses and/or domains to be looked up in a particular DNS
3271 39. Added log_selector=+queue_time_overall.
3273 40. When running the queue in the test harness, wait just a tad after forking a
3274 delivery process, to get repeatability of debugging output.
3276 41. Include certificate and key file names in error message when GnuTLS fails
3277 to set them up, because the GnuTLS error message doesn't include the name
3278 of the failing file when there is a problem reading it.
3280 42. Allow both -bf and -bF in the same test run.
3282 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3284 44. The "Exiscan patch" is now merged into the mainline Exim source.
3286 45. Sometimes the final signoff response after QUIT could fail to get
3287 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3288 < 0 before doing a fflush(). This bug looks as though it goes back to the
3289 introduction of TLS in release 3.20, but "sometimes" must have been rare
3290 because the tests only now provoked it.
3292 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3293 (this can affect the format of dates).
3295 47. exim_tidydb, when checking for the continued existence of a message for
3296 which it has found a message-specific retry record, was not finding
3297 messages that were in split spool directories. Consequently, it was
3298 deleting retry records that should have stayed in existence.
3300 48. Steve fixed some bugs in eximstats.
3302 49. The SPA authentication driver was not abandoning authentication and moving
3303 on to the next authenticator when an expansion was forced to fail,
3304 contradicting the general specification for all authenticators. Instead it
3305 was generating a temporary error. It now behaves as specified.
3307 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3308 (the order specifies the preference for clients). The order is now AES256,
3309 AES128, 3DES, ARCFOUR128.
3311 51. Small patch to Sieve code - explicitly set From: when generating an
3314 52. Exim crashed if a remote delivery caused a very long error message to be
3315 recorded - for instance if somebody sent an entire SpamAssassin report back
3316 as a large number of 550 error lines. This bug was coincidentally fixed by
3317 increasing the size of one of Exim's internal buffers (big_buffer) that
3318 happened as part of the Exiscan merge. However, to be on the safe side, I
3319 have made the code more robust (and fixed the comments that describe what
3322 53. Now that there can be additional text after "Completed" in log lines (if
3323 the queue_time_overall log selector is set), a one-byte patch to exigrep
3324 was needed to allow it to recognize "Completed" as not the last thing in
3327 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3328 patch that reportedly fixes this has been added. I am not expert enough to
3329 create a test for it. This is what the patch creator wrote:
3331 "I found a little strange behaviour of ldap code when working with
3332 Windows 2003 AD Domain, where users was placed in more than one
3333 Organization Units. When I tried to give exim partial DN, the exit code
3334 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3335 But simultaneously result of request was absolutely normal ldap result,
3336 so I produce this patch..."
3338 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3339 REFERENCE, so I have modified the code to exclude the patch when that macro
3342 55. Some experimental protocols are using DNS PTR records for new purposes. The
3343 keys for these records are domain names, not reversed IP addresses. The
3344 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3345 leaves it alone. Component reversal etc. now happens only for IP addresses.
3348 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3350 57. Double the size of the debug message buffer (to 2048) so that more of very
3351 long debug lines gets shown.
3353 58. The exicyclog utility now does better if the number of log files to keep
3354 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3356 59. Two changes related to the smtp_active_hostname option:
3358 (1) $smtp_active_hostname is now available as a variable.
3359 (2) The default for smtp_banner uses $smtp_active_hostname instead
3360 of $primary_hostname.
3362 60. The host_aton() function is supposed to be passed a string that is known
3363 to be a valid IP address. However, in the case of IPv6 addresses, it was
3364 not checking this. This is a hostage to fortune. Exim now panics and dies
3365 if the condition is not met. A case was found where this could be provoked
3366 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3367 components; fortuitously, this particular loophole had already been fixed
3368 by change 4.50/55 above.
3370 If there are any other similar loopholes, the new check in host_aton()
3371 itself should stop them being exploited. The report I received stated that
3372 data on the command line could provoke the exploit when Exim was running as
3373 exim, but did not say which command line option was involved. All I could
3374 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3375 running as the user.
3378 61. There was a buffer overflow vulnerability in the SPA authentication code
3379 (which came originally from the Samba project). I have added a test to the
3380 spa_base64_to_bits() function which I hope fixes it.
3383 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3384 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3386 63. The daemon start-up calls getloadavg() while still root for those OS that
3387 need the first call to be done as root, but it missed one case: when
3388 deliver_queue_load_max is set with deliver_drop_privilege. This is
3389 necessary for the benefit of the queue runner, because there is no re-exec
3390 when deliver_drop_privilege is set.
3392 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3393 This has been fixed.
3395 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3396 was in use, was not putting the data itself into the right store pool;
3397 consequently, it could be overwritten for a subsequent message in the same
3398 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3401 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3403 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3404 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3405 the function were treating the return as a boolean value, which happened to
3406 work because 0=false and not-0=true, but is not correct code.
3408 68. The host_aton() function was not handling scoped IPv6 addresses (those
3409 with, for example, "%eth0" on the end) correctly.
3411 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3412 negated items (that is, ~something) in unsigned ints. Some compilers
3413 apparently mutter when there is no cast.
3415 70. If an address verification called from an ACL failed, and did not produce a
3416 user-specific message (i.e. there was only a "system" message), nothing was
3417 put in $acl_verify_message. In this situation, it now puts the system
3420 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3421 session; change 4.31/43 added the unwanted input to the log line - except
3422 that it did not do this in the start of session case. It now does.
3424 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3425 This is wrong and can cause the other end to generate a synchronization
3426 error if it is another Exim or anything else that does the synchronization
3427 check. A QUIT command is no longer sent after a timeout.
3429 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3430 during host lookups.
3432 74. The defer_ok option of callout verification was not working if it was used
3433 when verifying addresses in header lines, that is, for this case:
3435 verify = header_sender/callout=defer_ok
3437 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3438 those file descriptors could be used for SMTP connections. If anything
3439 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3440 could be sent to the SMTP client, causing chaos. The daemon now opens
3441 stdin, stdout, and stderr to /dev/null when it puts itself into the
3444 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3445 log by default. The user can override this with suitable Perl magic.
3447 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3448 the log message when discard triggers, was not working for the DATA ACL or
3449 for the non-SMTP ACL.
3451 78. Error message wording change in sieve.c.
3453 79. If smtp_accept_max_per_host was set, the number of connections could be
3454 restricted to fewer than expected, because the daemon was trying to set up
3455 a new connection before checking whether the processes handling previous
3456 connections had finished. The check for completed processes is now done
3457 earlier. On busy systems, this bug wouldn't be noticed because something
3458 else would have woken the daemon, and it would have reaped the completed
3461 80. If a message was submitted locally by a user whose login name contained one
3462 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3463 It caused a spool format error. I have fixed the spool reading code. A
3464 related problem was that the "from" clause in the Received: line became
3465 illegal because of the space(s). It is now covered by ${quote_local_part.
3467 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3470 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3472 83. Patch from Sieve maintainer to fix unterminated string problem in
3473 "vacation" handling.
3475 84. Some minor changes to the Linux configuration files to help with other
3476 OS variants using glibc.
3478 85. One more patch for Sieve to update vacation handling to latest spec.
3481 ----------------------------------------------------
3482 See the note above about the 4.44 and 4.50 releases.
3483 ----------------------------------------------------
3489 1. Change 4.43/35 introduced a bug that caused file counts to be
3490 incorrectly computed when quota_filecount was set in an appendfile
3493 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3494 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3497 3. Give more explanation in the error message when the command for a transport
3498 filter fails to execute.
3500 4. There are several places where Exim runs a non-Exim command in a
3501 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3502 was being done only for the command run by the queryprogram router. It is
3503 now done for all such subprocesses. The other cases are: ${run, transport
3504 filters, and the commands run by the lmtp and pipe transports.
3506 5. Some older OS have a limit of 256 on the maximum number of file
3507 descriptors. Exim was using setrlimit() to set 1000 as a large value
3508 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3509 systems. I've change it so that if it can't get 1000, it tries for 256.
3511 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3512 was an oversight, and furthermore, ever since the addition of extra
3513 controls (e.g. 4.43/32), the checks on when to allow different forms of
3514 "control" were broken. There should now be diagnostics for all cases when a
3515 control that does not make sense is encountered.
3517 7. $recipients is now available in the predata ACL (oversight).
3519 8. Tidy the search cache before the fork to do a delivery from a message
3520 received from the command line. Otherwise the child will trigger a lookup
3521 failure and thereby defer the delivery if it tries to use (for example) a
3522 cached ldap connection that the parent has called unbind on.
3524 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3525 of $address_data from the recipient verification was clobbered by the
3526 sender verification.
3528 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3529 was its contents. (It was OK if the option was not defined at all.)
3531 11. A "Completed" log line is now written for messages that are removed from
3532 the spool by the -Mrm option.
3534 12. $host_address is now set to the target address during the checking of
3535 ignore_target_hosts.
3537 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3538 being passed; this would have caused $sender_host_name to have been used if
3539 matching the list had actually called for a host name (not very likely,
3540 since this list is usually IP addresses). A host name is now passed as
3543 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3544 code that specifies a non-restarting handler (typically sigaction() in
3545 modern systems) in an attempt to fix a rare and obscure crash bug.
3547 15. Narrowed the window for a race in the daemon that could cause it to ignore
3548 SIGCHLD signals. This is not a major problem, because they are used only to
3549 wake it up if nothing else does.
3551 16. A malformed maildirsize file could cause Exim to calculate negative values
3552 for the mailbox size or file count. Odd effects could occur as a result.
3553 The maildirsize information is now recalculated if the size or filecount
3556 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3557 support for a long time. Removed HAVE_SYS_VFS_H.
3559 18. Updated exipick to current release from John Jetmore.
3561 19. Allow an empty sender to be matched against a lookup in an address list.
3562 Previously the only cases considered were a regular expression, or an
3565 20. Exim went into a mad DNS lookup loop when doing a callout where the
3566 host was specified on the transport, if the DNS lookup yielded more than
3569 21. The RFC2047 encoding function was originally intended for short strings
3570 such as real names; it was not keeping to the 75-character limit for
3571 encoded words that the RFC imposes. It now respects the limit, and
3572 generates multiple encoded words if necessary. To be on the safe side, I
3573 have increased the buffer size for the ${rfc2047: expansion operator from
3576 22. Failure to deliver a bounce message always caused it to be frozen, even if
3577 there was an errors_to setting on the router. The errors_to setting is now
3580 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3581 canonical form (fully expanded) before being placed in
3582 $sender_host_address.
3584 24. Updated eximstats to version 1.33
3586 25. Include certificate and key file names in error message when GnuTLS fails
3587 to set them up, because the GnuTLS error message doesn't include the name
3588 of the failing file when there is a problem reading it.
3590 26. Expand error message when OpenSSL has problems setting up cert/key files.
3593 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3594 (this can affect the format of dates).
3596 28. exim_tidydb, when checking for the continued existence of a message for
3597 which it has found a message-specific retry record, was not finding
3598 messages that were in split spool directories. Consequently, it was
3599 deleting retry records that should have stayed in existence.
3601 29. eximstats updated to version 1.35
3602 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3603 1.35 - bugfix such that pie charts by volume are generated correctly
3605 30. The SPA authentication driver was not abandoning authentication and moving
3606 on to the next authenticator when an expansion was forced to fail,
3607 contradicting the general specification for all authenticators. Instead it
3608 was generating a temporary error. It now behaves as specified.
3610 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3611 (the order specifies the preference for clients). The order is now AES256,
3612 AES128, 3DES, ARCFOUR128.
3614 31. Small patch to Sieve code - explicitly set From: when generating an
3617 32. Exim crashed if a remote delivery caused a very long error message to be
3618 recorded - for instance if somebody sent an entire SpamAssassin report back
3619 as a large number of 550 error lines. This bug was coincidentally fixed by
3620 increasing the size of one of Exim's internal buffers (big_buffer) that
3621 happened as part of the Exiscan merge. However, to be on the safe side, I
3622 have made the code more robust (and fixed the comments that describe what
3625 33. Some experimental protocols are using DNS PTR records for new purposes. The
3626 keys for these records are domain names, not reversed IP addresses. The
3627 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3628 leaves it alone. Component reversal etc. now happens only for IP addresses.
3631 34. The host_aton() function is supposed to be passed a string that is known
3632 to be a valid IP address. However, in the case of IPv6 addresses, it was
3633 not checking this. This is a hostage to fortune. Exim now panics and dies
3634 if the condition is not met. A case was found where this could be provoked
3635 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3636 components; fortuitously, this particular loophole had already been fixed
3637 by change 4.50/55 or 4.44/33 above.
3639 If there are any other similar loopholes, the new check in host_aton()
3640 itself should stop them being exploited. The report I received stated that
3641 data on the command line could provoke the exploit when Exim was running as
3642 exim, but did not say which command line option was involved. All I could
3643 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3644 running as the user.
3647 35. There was a buffer overflow vulnerability in the SPA authentication code
3648 (which came originally from the Samba project). I have added a test to the
3649 spa_base64_to_bits() function which I hope fixes it.
3652 36. The daemon start-up calls getloadavg() while still root for those OS that
3653 need the first call to be done as root, but it missed one case: when
3654 deliver_queue_load_max is set with deliver_drop_privilege. This is
3655 necessary for the benefit of the queue runner, because there is no re-exec
3656 when deliver_drop_privilege is set.
3658 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3659 was in use, was not putting the data itself into the right store pool;
3660 consequently, it could be overwritten for a subsequent message in the same
3661 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3664 38. Sometimes the final signoff response after QUIT could fail to get
3665 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3666 < 0 before doing a fflush(). This bug looks as though it goes back to the
3667 introduction of TLS in release 3.20, but "sometimes" must have been rare
3668 because the tests only now provoked it.
3674 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3675 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3676 Now it returns an integer. A number of calls were still expecting a T/F
3677 return. Fortuitously, in all cases, the tests worked in OK situations,
3678 which is the norm. However, things would have gone wrong on any write
3679 failures on the smtp file descriptor. This function is used when sending
3680 messages over SMTP and also when doing verify callouts.
3682 2. When Exim is called to do synchronous delivery of a locally submitted
3683 message (the -odf or -odi options), it no longer closes stderr before doing
3686 3. Implemented the mua_wrapper option.
3688 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3690 5. Implemented the functions header_remove(), header_testname(),
3691 header_add_at_position(), and receive_remove_recipient(), and exported them
3694 6. If an ACL "warn" statement specified the addition of headers, Exim already
3695 inserted X-ACL-Warn: at the start if there was no header name. However, it
3696 was not making this test for the second and subsequent header lines if
3697 there were newlines in the string. This meant that an invalid header could
3698 be inserted if Exim was badly configured.
3700 7. Allow an ACL "warn" statement to add header lines at the start or after all
3701 the Received: headers, as well as at the end.
3703 8. Added the rcpt_4xx retry error code.
3705 9. Added postmaster_mailfrom=xxx to callout verification option.
3707 10. Added mailfrom=xxxx to the callout verification option, for verify=
3710 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3711 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3713 12. Inserted some casts to stop certain compilers warning when using pointer
3714 differences as field lengths or precisions in printf-type calls (mostly
3715 affecting debugging statements).
3717 13. Added optional readline() support for -be (dynamically loaded).
3719 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3720 same clock tick as a message's arrival, so that its received time was the
3721 same as the "first fail" time on the retry record, and that message
3722 remained on the queue past the ultimate address timeout, every queue runner
3723 would try a delivery (because it was past the ultimate address timeout) but
3724 after another failure, the ultimate address timeout, which should have then
3725 bounced the address, did not kick in. This was a "< instead of <=" error;
3726 in most cases the first failure would have been in the next clock tick
3727 after the received time, and all would be well.
3729 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3730 being recognized when the domain list was tested by the match_domain
3731 condition in an expansion string.
3733 16. Added the ${str2b64: operator.
3735 17. Exim was always calling setrlimit() to set a large limit for the number of
3736 processes, without checking whether the existing limit was already
3737 adequate. (It did check for the limit on file descriptors.) Furthermore,
3738 errors from getrlimit() and setrlimit() were being ignored. Now they are
3739 logged to the main and panic logs, but Exim does carry on, to try to do its
3740 job under whatever limits there are.
3742 18. Imported PCRE 5.0.
3744 19. Trivial typo in log message " temporarily refused connection" (the leading
3747 20. If the log selector return_path_on_delivery was set and an address was
3748 redirected to /dev/null, the delivery process crashed because it assumed
3749 that a return path would always be set for a "successful" delivery. In this
3750 case, the whole delivery is bypassed as an optimization, and therefore no
3753 21. Internal re-arrangement: the function for sending a challenge and reading
3754 a response while authentication was assuming a zero-terminated challenge
3755 string. It's now changed to take a pointer and a length, to allow for
3756 binary data in such strings.
3758 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3760 23. Exim was not respecting finduser_retries when seeking the login of the
3761 uid under which it was called; it was always trying 10 times. (The default
3762 setting of finduser_retries is zero.) Also, it was sleeping after the final
3763 failure, which is pointless.
3765 24. Implemented tls_on_connect_ports.
3767 25. Implemented acl_smtp_predata.
3769 26. If the domain in control=submission is set empty, Exim assumes that the
3770 authenticated id is a complete email address when it generates From: or
3771 Sender: header lines.
3773 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3774 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3775 chown and chgrp in /bin and hostname in /usr/bin.
3777 28. Exim was keeping the "process log" file open after each use, just as it
3778 does for the main log. This opens the possibility of it remaining open for
3779 long periods when the USR1 signal hits a daemon. Occasional processlog
3780 errors were reported, that could have been caused by this. Anyway, it seems
3781 much more sensible not to leave this file open at all, so that is what now
3784 29. The long-running daemon process does not normally write to the log once it
3785 has entered its main loop, and it closes the log before doing so. This is
3786 so that log files can straightforwardly be renamed and moved. However,
3787 there are a couple of unusual error situations where the daemon does write
3788 log entries, and I had neglected to close the log afterwards.
3790 30. The text of an SMTP error response that was received during a remote
3791 delivery was being truncated at 512 bytes. This is too short for some of
3792 the long messages that one sometimes sees. I've increased the limit to
3795 31. It is now possible to make retry rules that apply only when a message has a
3796 specific sender, in particular, an empty sender.
3798 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3799 it possible to be selective about when SMTP synchronization is enforced.
3801 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3803 32. Implemented hosts_connection_nolog.
3805 33. Added an ACL for QUIT.
3807 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3810 35. Added mailbox_size and mailbox_filecount to appendfile.
3812 36. Added control = no_multiline_responses to ACLs.
3814 37. There was a bug in the logic of the code that waits for the clock to tick
3815 in the case where the clock went backwards by a substantial amount such
3816 that the microsecond fraction of "now" was more than the microsecond
3817 fraction of "then" (but the whole seconds number was less).
3819 38. Added support for the libradius Radius client library this is found on
3820 FreeBSD (previously only the radiusclient library was supported).
3826 1. When certain lookups returned multiple values in the form name=value, the
3827 quoting of the values was not always being done properly. Specifically:
3828 (a) If the value started with a double quote, but contained no whitespace,
3830 (b) If the value contained whitespace other than a space character (i.e.
3831 tabs or newlines or carriage returns) it was not quoted.
3832 This fix has been applied to the mysql and pgsql lookups by writing a
3833 separate quoting function and calling it from the lookup code. The fix
3834 should probably also be applied to nisplus, ibase and oracle lookups, but
3835 since I cannot test any of those, I have not disturbed their existing code.
3837 2. A hit in the callout cache for a specific address caused a log line with no
3838 reason for rejecting RCPT. Now it says "Previous (cached) callout
3839 verification failure".
3841 3. There was an off-by-one bug in the queryprogram router. An over-long
3842 return line was truncated at 256 instead of 255 characters, thereby
3843 overflowing its buffer with the terminating zero. As well as fixing this, I
3844 have increased the buffer size to 1024 (and made a note to document this).
3846 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3847 when Exim is waiting for an SMTP response from a remote server, Exim
3848 restarts its select() call on the socket, thereby resetting its timeout.
3849 This is not a problem when such interrupts are rare. Somebody set up a cron
3850 job to run exiwhat every 2 minutes, which is less than the normal select()
3851 timeout (5 or 10 minutes). This meant that the select() timeout never
3852 kicked in because it was always reset. I have fixed this by comparing the
3853 time when an interrupt arrives with the time at the start of the first call
3854 to select(). If more time than the timeout has elapsed, the interrupt is
3855 treated as a timeout.
3857 5. Some internal re-factoring in preparation for the addition of Sieve
3858 extensions (by MH). In particular, the "personal" test is moved to a
3859 separate function, and given an option for scanning Cc: and Bcc: (which is
3860 not set for Exim filters).
3862 6. When Exim created an email address using the login of the caller as the
3863 local part (e.g. when creating a From: or Sender: header line), it was not
3864 quoting the local part when it contained special characters such as @.
3866 7. Installed new OpenBSD configuration files.
3868 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3869 try to make them clearer.
3871 9. Callout options, other than the timeout value, were being ignored when
3872 verifying sender addresses in header lines. For example, when using
3874 verify = header_sender/callout=no_cache
3876 the cache was (incorrectly) being used.
3878 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3879 only the Cygwin environment.
3881 11. When return_path_on_delivery was set as a log selector, if different remote
3882 addresses in the same message used different return paths and parallel
3883 remote delivery occurred, the wrong values would sometimes be logged.
3884 (Whenever a remote delivery process finished, the return path value from
3885 the most recently started remote delivery process was logged.)
3887 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3888 lines when AUTH and/or TLS are in use. This is the "received protocol"
3889 field. Exim used to use "asmtp" for authenticated SMTP, without any
3890 indication (in the protocol name) for TLS use. Now it follows the RFC and
3891 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3892 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3893 names appear in log lines as well as in Received: header lines.
3895 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3896 extensions, and comparison tests, and to fix some bugs.
3898 14. Changes to the "personal" filter test:
3900 (1) The test was buggy in that it was just doing the equivalent of
3901 "contains" tests on header lines. For example, if a user's address was
3902 anne@some.where, the "personal" test would incorrectly be true for
3904 To: susanne@some.where
3906 This test is now done by extracting each address from the header in turn,
3907 and checking the entire address. Other tests that are part of "personal"
3908 are now done using regular expressions (for example, to check local parts
3909 of addresses in From: header lines).
3911 (2) The list of non-personal local parts in From: addresses has been
3912 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3913 taken from the Sieve specification recommendations.
3915 (3) If the message contains any header line starting with "List-" it is
3916 treated as non-personal.
3918 (4) The test for "circular" in the Subject: header line has been removed
3919 because it now seems ill-conceived.
3921 15. Minor typos in src/EDITME comments corrected.
3923 16. Installed latest exipick from John Jetmore.
3925 17. If headers_add on a router specified a text string that was too long for
3926 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3927 of string_sprintf() is now avoided.
3929 18. $message_body_size was not set (it was always zero) when running the DATA
3930 ACL and the local_scan() function.
3932 19. For the "mail" command in an Exim filter, no default was being set for
3933 the once_repeat time, causing a random time value to be used if "once" was
3934 specified. (If the value happened to be <= 0, no repeat happened.) The
3935 default is now 0s, meaning "never repeat". The "vacation" command was OK
3936 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3937 (I found it when inspecting the code).
3939 20. There is now an overall timeout for performing a callout verification. It
3940 defaults to 4 times the callout timeout, which applies to individual SMTP
3941 commands during the callout. The overall timeout applies when there is more
3942 than one host that can be tried. The timeout is checked before trying the
3943 next host. This prevents very long delays if there are a large number of
3944 hosts and all are timing out (e.g. when the network connections are timing
3945 out). The value of the overall timeout can be changed by specifying an
3946 additional sub-option for "callout", called "maxwait". For example:
3948 verify = sender/callout=5s,maxwait=20s
3950 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3951 to the end before writing, but this should make it even safer).
3953 22. Exim was forgetting that it had advertised PIPELINING for the second and
3954 subsequent messages on an SMTP connection. It was also not resetting its
3955 memory on STARTTLS and an internal HELO.
3957 23. When Exim logs an SMTP synchronization error within a session, it now
3958 records whether PIPELINING has been advertised or not.
3960 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3961 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3962 rather than long int.
3964 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3966 26. Added the never_mail option to autoreply.
3972 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3973 crash if the getsockname() call failed; this can happen if a connection is
3974 closed very soon after it is established. The problem was simply in the
3975 order in which certain operations were done, causing Exim to try to write
3976 to the SMTP stream before it had set up the file descriptor. The bug has
3977 been fixed by making things happen in the correct order.
3983 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3984 before the connection was closed, thus losing the rejection response.
3986 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3987 some early Solaris releases, but causes trouble in current releases where
3988 socklen_t is defined.
3990 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3993 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3996 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3997 that releasing the top of it at the end releases what was used for sub-
3998 expansions (unless the block got too big). However, discard this block if
3999 the first thing is a variable or header, so that we can use its block when
4000 it is dynamic (useful for very large $message_headers, for example).
4002 6. Lookups now cache *every* query, not just the most recent. A new, separate
4003 store pool is used for this. It can be recovered when all lookup caches are
4004 flushed. Lookups now release memory at the end of their result strings.
4005 This has involved some general refactoring of the lookup sources.
4007 7. Some code has been added to the store_xxx() functions to reduce the amount
4008 of flapping under certain conditions.
4010 8. log_incoming_interface used to affect only the <= reception log lines. Now
4011 it causes the local interface and port to be added to several more SMTP log
4012 lines, for example "SMTP connection from", and rejection lines.
4014 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4016 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4018 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4019 could be overwritten at the end of the current message (or the start of a
4020 new message if it was set in a HELO ACL). The value is now preserved for
4021 the duration of the SMTP connection.
4023 12. If a transport had a headers_rewrite setting, and a matching header line
4024 contained an unqualified address, that address was qualified, even if it
4025 did not match any rewriting rules. The underlying bug was that the values
4026 of the flags that permit the existence of unqualified sender and recipient
4027 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4028 non-local messages, and by -bnq for local messages) were not being
4029 preserved with the message after it was received.
4031 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4032 "next input=" as part of the text comprising the host identity instead of
4033 the correct text. The code was using the same buffer for two different
4034 strings. However, depending on which order the printing function evaluated
4035 its arguments, the bug did not always show up. Under Linux, for example, my
4036 test suite worked just fine.
4038 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4039 doesn't work with some older versions of Perl. It has been changed to "my",
4040 which in any case is probably the better facility to use.
4042 15. A really picky compiler found some instances of statements for creating
4043 error messages that either had too many or two few arguments for the format
4046 16. The size of the buffer for calls to the DNS resolver has been increased
4047 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4048 for addresses that have a lot of PTR records. This alleviates a problem; it
4049 does not fully solve it.
4051 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4052 buffer now truncates the list and logs the incident, which is the same
4053 action as happens when Exim is looking up a host name and its aliases.
4054 Previously in this situation something unpredictable would happen;
4055 sometimes it was "internal error: store_reset failed".
4057 18. If a server dropped the connection unexpectedly when an Exim client was
4058 using GnuTLS and trying to read a response, the client delivery process
4059 crashed while trying to generate an error log message.
4061 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4062 string, for example:
4064 warn message = H1: something\nH2: something
4066 the text was added as a single header line from Exim's point of view
4067 though it ended up OK in the delivered message. However, searching for the
4068 second and subsequent header lines using $h_h2: did not work. This has been
4069 fixed. Similarly, if a system filter added multiple headers in this way,
4070 the routers could not see them.
4072 20. Expanded the error message when iplsearch is called with an invalid key to
4073 suggest using net-iplsearch in a host list.
4075 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4076 ACLs are no longer actually imposed (and a message to that effect is
4079 22. If a "gecos" field in a passwd entry contained escaped characters, in
4080 particular, if it contained a \" sequence, Exim got it wrong when building
4081 a From: or a Sender: header from that name. A second bug also caused
4082 incorrect handling when an unquoted " was present following a character
4083 that needed quoting.
4085 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4086 was not being matched caselessly.
4088 24. Arranged for all hyphens in the exim.8 source to be escaped with
4091 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4092 properly. Recipient callout cache records were still being keyed to include
4093 the sender, even when use_sender was set false. This led to far more
4094 callouts that were necessary. The sender is no longer included in the key
4095 when use_sender is false.
4097 26. Added "control = submission" modifier to ACLs.
4099 27. Added the ${base62d: operator to decode base 62 numbers.
4101 28. dnsdb lookups can now access SRV records.
4103 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4104 the configuration file.
4106 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4107 (-v) mode. This makes the output for a verbose queue run more intelligible.
4109 31. Added a use_postmaster feature to recipient callouts.
4111 32. Added the $body_zerocount variable, containing the number of binary zero
4112 bytes in the message body.
4114 33. The time of last modification of the "new" subdirectory is now used as the
4115 "mailbox time last read" when there is a quota error for a maildir
4118 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4120 35. Added +ignore_unknown as a special item in host lists.
4122 36. Code for decoding IPv6 addresses in host lists is now included, even if
4123 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4124 address was recognized as an IP address, but was then not correctly decoded
4125 into binary, causing unexpected and incorrect effects when compared with
4132 1. Very minor rewording of debugging text in manualroute to say "list of
4133 hosts" instead of "hostlist".
4135 2. If verify=header_syntax was set, and a header line with an unqualified
4136 address (no domain) and a large number of spaces between the end of the
4137 name and the colon was received, the reception process suffered a buffer
4138 overflow, and (when I tested it) crashed. This was caused by some obsolete
4139 code that should have been removed. The fix is to remove it!
4141 3. When running in the test harness, delay a bit after writing a bounce
4142 message to get a bit more predictability in the log output.
4144 4. Added a call to search_tidyup() just before forking a reception process. In
4145 theory, someone could use a lookup in the expansion of smtp_accept_max_
4146 per_host which, without the tidyup, could leave open a database connection.
4148 5. Added the variables $recipient_data and $sender_data which get set from a
4149 lookup success in an ACL "recipients" or "senders" condition, or a router
4150 "senders" option, similar to $domain_data and $local_part_data.
4152 6. Moved the writing of debug_print from before to after the "senders" test
4155 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4156 problems for message scanning, either using a data ACL, or using
4157 local_scan() because the Received: header was not generated till after they
4158 were called (in order to set the time as the time of reception completion).
4159 I have revised the way this works. The header is now generated after the
4160 body is received, but before the ACL or local_scan() are called. After they
4161 are run, the timestamp in the header is updated.
4167 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4168 before starting a queue runner without re-exec. This happened only when
4169 deliver_drop_privilege was set or when the Exim user was set to root. The
4170 effect of the bug was that timeouts during subsequent deliveries caused
4171 crashes instead of being properly handled. The handler is now left at its
4172 default (and expected) setting.
4174 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4175 message, again when deliver_drop_privilege is set or Exim is run as root.
4176 The bug described in (1) was not present in this case, but the tidying up
4177 of the other signals was missing. I have made the two cases consistent.
4179 3. The ignore_target_hosts setting on a manualroute router was being ignored
4180 for hosts that were looked up using the /MX notation.
4182 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4185 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4186 operated on the sender address. After changing the $sender_address to <>
4187 for the sender address verify, Exim was re-instated it as the original
4188 (before rewriting) address, but remembering that it had rewritten it, so it
4189 wasn't rewriting it again. This bug also had the effect of breaking the
4190 sender address verification caching when the sender address was rewritten.
4192 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4193 This has been changed so that if the ip literal address matches
4194 ignore_target_hosts, the router declines.
4196 7. Added expansion conditions match_domain, match_address, and match_local_
4197 part (NOT match_host).
4199 8. The placeholder for the Received: header didn't have a length field set.
4201 9. Added code to Exim itself and to exim_lock to test for a specific race
4202 condition that could lead to file corruption when using MBX delivery. The
4203 issue is with the lockfile that is created in /tmp. If this file is removed
4204 after a process has opened it but before that process has acquired a lock,
4205 there is the potential for a second process to recreate the file and also
4206 acquire a lock. This could lead to two Exim processes writing to the file
4207 at the same time. The added code performs the same test as UW imapd; it
4208 checks after acquiring the lock that its file descriptor still refers to
4209 the same named file.
4211 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4212 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4215 11. Added the smtp_active_hostname option. If used, this will typically be made
4216 to depend on the incoming interface address. Because $interface_address is
4217 not set up until the daemon has forked a reception process, error responses
4218 that can happen earlier (such as "too many connections") no longer contain
4221 12. If an expansion in a condition on a "warn" statement fails because a lookup
4222 defers, the "warn" statement is abandoned, and the next ACL statement is
4223 processed. Previously this caused the whole ACL to be aborted.
4225 13. Added the iplsearch lookup type.
4227 14. Added ident_timeout as a log selector.
4229 15. Added tls_certificate_verified as a log selector.
4231 16. Added a global option tls_require_ciphers (compare the smtp transport
4232 option of the same name). This controls incoming TLS connections.
4234 17. I finally figured out how to make tls_require_ciphers do a similar thing
4235 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4236 before starting the TLS session.
4238 18. Tabs are now shown as \t in -bP output.
4240 19. If the log selector return_path_on_delivery was set, Exim crashed when
4241 bouncing a message because it had too many Received: header lines.
4243 20. If two routers both had headers_remove settings, and the first one included
4244 a superfluous trailing colon, the final name in the first list and the
4245 first name in the second list were incorrectly joined into one item (with a
4246 colon in the middle).
4252 1. Added -C and -D options to the exinext utility, mainly to make it easier
4253 to include in the automated testing, but these could be helpful when
4254 multiple configurations are in use.
4256 2. The exinext utility was not formatting the output nicely when there was
4257 an alternate port involved in the retry record key, nor when there was a
4258 message id as well (for retries that were specific to a specific message
4259 and a specific host). It was also confused by IPv6 addresses, because of
4260 the additional colons they contain. I have fixed the IPv4 problem, and
4261 patched it up to do a reasonable job for IPv6.
4263 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4264 delivery, the log line now contains "pipelined" if PIPELINING was used.
4266 4. An SMTP transport process used to panic and die if the bind() call to set
4267 an explicit outgoing interface failed. This has been changed; it is now
4268 treated in the same way as a connect() failure.
4270 5. A reference to $sender_host_name in the part of a conditional expansion
4271 that was being skipped was still causing a DNS lookup. This no longer
4274 6. The def: expansion condition was not recognizing references to header lines
4275 that used bh_ and bheader_.
4277 7. Added the _cache feature to named lists.
4279 8. The code for checking quota_filecount in the appendfile transport was
4280 allowing one more file than it should have been.
4282 9. For compatibility with Sendmail, the command line option
4290 and sets the incoming protocol and host name (for trusted callers). The
4291 host name and its colon can be omitted when only the protocol is to be set.
4292 Note the Exim already has two private options, -pd and -ps, that refer to
4293 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4294 "s", but I don't think that's a major issue.
4296 10. A number of refactoring changes to the code, none of which should affect
4299 (a) The number of logging options was getting close to filling up the
4300 32-bit word that was used as a bit map. I have split them into two classes:
4301 those that are passed in the argument to log_write(), and those that are
4302 only ever tested independently outside of that function. These are now in
4303 separate 32-bit words, so there is plenty of room for expansion again.
4304 There is no change in the user interface or the logging behaviour.
4306 (b) When building, for example, log lines, the code previously used a
4307 macro that called string_cat() twice, in order to add two strings. This is
4308 not really sufficiently general. Furthermore, there was one instance where
4309 it was actually wrong because one of the argument was used twice, and in
4310 one call a function was used. (As it happened, calling the function twice
4311 did not affect the overall behaviour.) The macro has been replaced by a
4312 function that can join an arbitrary number of extra strings onto a growing
4315 (c) The code for expansion conditions now uses a table and a binary chop
4316 instead of a serial search (which was left over from when there were very
4317 few conditions). Also, it now recognizes conditions like "pam" even when
4318 the relevant support is not compiled in: a suitably worded error message is
4319 given if an attempt is made to use such a condition.
4321 11. Added ${time_interval:xxxxx}.
4323 12. A bug was causing one of the ddress fields not to be passed back correctly
4324 from remote delivery subprocesses. The field in question was not being
4325 subsequently used, so this caused to problems in practice.
4327 13. Added new log selectors queue_time and deliver_time.
4329 14. Might have fixed a bug in maildirsizefile handling that threw up
4330 "unexpected character" debug warnings, and recalculated the data
4331 unnecessarily. In any case, I expanded the warning message to give more
4334 15. Added the message "Restricted characters in address" to the statements in
4335 the default ACL that block characters like @ and % in local parts.
4337 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4338 Three changes have been made:
4340 (a) There was a serious bug; a negative response to MAIL caused the whole
4341 recipient domain to be cached as invalid, thereby blocking all messages
4342 to all local parts at the same domain, from all senders. This bug has
4343 been fixed. The domain is no longer cached after a negative response to
4344 MAIL if the sender used is not empty.
4346 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4349 (c) A new callout option, "use_sender" has been added for people who want
4350 the modified behaviour.
4356 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4359 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4360 indeed breaks things for older releases.
4362 3. Added additional logging to the case where there is a problem reading data
4363 from a filter that is running in a subprocess using a pipe, in order to
4364 try to track down a specific problem.
4366 4. Testing facility fudge: when running in the test harness and attempting
4367 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4368 getting "No route to host". Convert this to a timeout.
4370 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4373 6. Some OS don't have socklen_t but use size_t instead. This affects the
4374 fifth argument of getsockopt() amongst other things. This is now
4375 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4376 can be set for individual OS. I have set it for SunOS5, OSF1, and
4377 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4378 some earlier ones do not.
4380 7. Change 4.30/15 was not doing the test caselessly.
4382 8. The standard form for an IPv6 address literal was being rejected by address
4383 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4384 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4385 this, as well as the form without the "IPv6" on the front (but only when
4386 address literals are enabled, of course).
4388 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4390 10. Exim crashed if a message with an empty sender address specified by -f
4391 encountered a router with an errors_to setting. This could be provoked only
4392 by a command such as
4396 where an empty string was supplied; "<>" did not hit this bug.
4398 11. Installed PCRE release 4.5.
4400 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4401 remained set. It is now erased.
4403 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4404 times from message ids (which are base 36 rather than the normal 62).
4406 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4407 were being counted as actual protocol errors, and logged if the log
4408 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4409 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4410 and DATA following a set of rejected RCPTs do not count as protocol errors.
4411 In other words, Exim assumes they were pipelined, though this may not
4412 actually be the case. Of course, in all cases the client gets an
4413 appropriate error code.
4415 15. If a lookup fails in an ACL condition, a message about the failure may
4416 be available; it is used if testing the ACL cannot continue, because most
4417 such messages specify what the cause of the deferral is. However, some
4418 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4419 that caused an old message to be retained and used if a later statement
4420 caused a defer, replacing the real cause of the deferral.
4422 16. If an IP address had so many PTR records that the DNS lookup buffer
4423 was not large enough to hold them, Exim could crash while trying to process
4424 the truncated data. It now detects and logs this case.
4426 17. Further to 4.21/58, another change has been made: if (and only if) the
4427 first line of a message (the first header line) ends with CRLF, a bare LF
4428 in a subsequent header line has a space inserted after it, so as not to
4429 terminate the header.
4431 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4432 unnecessarily, used atoi() instead of strtol(), and didn't check the
4433 termination when getting file sizes from file names by regex.
4435 19. Completely re-implemented the support for maildirsize files, in the light
4436 of a number of problems with the previous contributed implementation
4437 (4.30/29). In particular:
4439 . If the quota is zero, the maildirsize file is maintained, but no quota is
4442 . If the maildir directory does not exist, it is created before any attempt
4443 to write a maildirsize file.
4445 . The quota value in the file is just a cache; if the quota is changed in
4446 the transport, the new value overrides.
4448 . A regular expression is available for excluding directories from the
4451 20. The autoreply transport checks the characters in options that define the
4452 message's headers; it allows continued headers, but it was checking with
4453 isspace() after an embedded newline instead of explicitly looking for a
4456 21. If all the "regular" hosts to which an address was routed had passed their
4457 expiry times, and had not reached their retry times, the address was
4458 bounced, even if fallback hosts were defined. Now Exim should go on to try
4461 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4462 equivalent code in the SMTP transport. Some hosts send humungous responses
4463 to HELO/EHLO, more than 1024 it seems.
4465 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4466 gives compiler warnings in some environments. I've now done it "properly",
4469 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4470 (because of problems with the built-in one) was declared to return uschar *
4471 instead of char *, causing compiler failure.
4473 25. Fixed a file descriptor leak when processing alias/forward files.
4475 26. Fixed a minor format string issue in dbfn.c.
4477 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4479 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4480 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4483 29. When a sender address is verified, it is cached, to save repeating the test
4484 when there is more than one recipient in a message. However, when the
4485 verification involves a callout, it is possible for different callout
4486 options to be set for different recipients. It is too complicated to keep
4487 track of this in the cache, so now Exim always runs a verification when a
4488 callout is required, relying on the callout cache for the optimization.
4489 The overhead is duplication of the address routing, but this should not be
4492 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4493 to be verified with callout=postmaster, and the main callout worked but the
4494 postmaster check failed, the verification correctly failed. However, if a
4495 subsequent RCPT command asked for sender verification *without* the
4496 postmaster check, incorrect caching caused this verification also to fail,
4499 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4500 it was not caching the DNS options (qualify_single, search_parents) that
4501 were used when the lookup failed. A subsequent lookup with different
4502 options therefore always gave the same answer, though there were cases
4503 where it should not have. (Example: a "domains = !$mx_any" option on a
4504 dnslookup router: the "domains" option is always processed without any
4505 widening, but the router might have qualify_single set.) Now Exim uses the
4506 cached value only when the same options are set.
4508 32. Added John Jetmore's "exipick" utility to the distribution.
4510 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4511 than a timeout (e.g. a certificate is required, and is not provided), an
4512 Exim server now closes the connection immediately. Previously it waited for
4513 the client to close - but if the client is SSL, it seems that they each
4514 wait for each other, leading to a delay before one of them times out.
4516 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4517 maintained 0.8.x compatibility because I don't think many are using it, and
4518 it is clearly obsolete.
4520 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4523 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4524 client certificate was expired. A simple patch fixes this, though I don't
4525 understand the full logic of why the verify callback is called multiple
4528 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4529 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4530 which causes problems with some clients (such as the Certicom SSL Plus
4531 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4532 disables the coutermeasure allowing Eudora to connect."
4534 38. Exim was not checking that a write() to a log file succeeded. This could
4535 lead to Bad Things if a log got too big, in particular if it hit a file
4536 size limit. Exim now panics and dies if it cannot write to a log file, just
4537 as it does if it cannot open a log file.
4539 39. Modified OS/Makefile-Linux so that it now contains
4541 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4543 The two -D definitions ensure that Exim is compiled with large file
4544 support, which makes it possible to handle log files that are bigger than
4547 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4548 instance) a domain was checked against a named list that involved a lookup,
4549 causing $domain_data to be set, then another domain was checked against the
4550 same list, then the first domain was re-checked, the value of $domain_data
4551 after the final check could be wrong. In particular, if the second check
4552 failed, it could be set empty. This bug probably also applied to
4555 41. The strip_trailing_dot option was not being applied to the address given
4556 with the -f command-line option.
4558 42. The code for reading a message's header from the spool was incrementing
4559 $received_count, but never initializing it. This meant that the value was
4560 incorrect (doubled) while delivering a message in the same process in which
4561 it was received. In the most common configuration of Exim, this never
4562 happens - a fresh exec is done - but it can happen when
4563 deliver_drop_privilege is set.
4565 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4566 it now includes up to 150 characters of the unexpected data in the log
4569 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4570 and building data strings. The size of both of these buffers was 10 000
4571 bytes - far larger than anybody would *ever* want, thought I. Needless to
4572 say, somebody hit the limit. I have increased the maximum line length to
4573 20 000 and the maximum data length of concatenated lines to 100 000. I have
4574 also fixed two bugs, because there was no checking on these buffers. Tsk,
4575 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4576 buffer is too small.
4578 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4579 lsearch lookups. Now it does.
4581 46. When parsing a route_list item in a manualroute router, a fixed-length
4582 buffer was used for the list of hosts. I made this 1024 bytes long,
4583 thinking that nobody would ever have a list of hosts that long. Wrong.
4584 Somebody had a whole pile of complicated expansion conditions, and the
4585 string was silently truncated, leading to an expansion error. It turns out
4586 that it is easier to change to an unlimited length (owing to other changes
4587 that have happened since this code was originally written) than to build
4588 structure for giving a limitation error. The length of the item that
4589 expands into the list of hosts is now unlimited.
4591 47. The lsearch lookup could not handle data where the length of text line was
4592 more than 4095 characters. Such lines were truncated, leading to shortened
4593 data being returned. It should now handle lines of any length.
4595 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4596 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4599 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4600 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4601 no longer happens in comment lines. A list of replacements is now placed
4602 at the head of all of the source files, except those whose only change is
4603 to replace PERL_COMMAND in the very first #! line.
4605 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4606 messages on the queue, with a bottom-up merge sort, using code contributed
4607 by Michael Haardt. This should make operations like -bp somewhat faster on
4608 large queues. It won't affect queue runners, except when queue_run_in_order
4611 51. Installed eximstats 1.31 in the distribution.
4613 52. Added support for SRV lookups to the dnslookup router.
4615 53. If an ACL referred to $message_body or $message_body_end, the value was not
4616 reset for any messages that followed in the same SMTP session.
4618 54. The store-handling optimization for building very long strings was not
4619 differentiating between the different store pools. I don't think this
4620 actually made any difference in practice, but I've tidied it.
4622 55. While running the routers to verify a sender address, $sender_address
4623 was still set to the sender address. This is wrong, because when routing to
4624 send a bounce to the sender, it would be empty. Therefore, I have changed
4625 it so that, while verifying a sender address, $sender_address is set to <>.
4626 (There is no change to what happens when verifying a recipient address.)
4628 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4629 target A or AAAA records (if not already returned) without resetting the
4630 qualify_single or search_parents options of the DNS resolver. These are
4631 inappropriate in this case because the targets of MX and SRV records must
4632 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4633 target that, when qualified, matched something in the local domain. These
4634 two options are now turned off when doing these lookups.
4636 57. It seems that at least some releases of Reiserfs (which does not have the
4637 concept of a fixed number of inodes) returns zero and not -1 for the
4638 number of available inodes. This interacted badly with check_spool_inodes,
4639 which assumed that -1 was the "no such thing" setting. What I have done is
4640 to check that the total number of inodes is greater than zero before doing
4641 the test of how many are available.
4643 58. When a "warn" ACL statement has a log_message modifier, the message is
4644 remembered, and not repeated. This is to avoid a lot of repetition when a
4645 message has many recipients that cause the same warning to be written.
4646 Howewer, Exim was preserving the list of already written lines for an
4647 entire SMTP session, which doesn't seem right. The memory is now reset if a
4648 new message is started.
4650 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4651 debugging output unless log_rewrite was also set.
4653 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4654 of (int)(handle) when we know that handle contains (void *)(-1).
4656 61. The Exim daemon panic-logs an error return when it closes the incoming
4657 connection. However "connection reset by peer" seems to be common, and
4658 isn't really an error worthy of noting specially, so that particular error
4661 62. When Exim is trying to find all the local interfaces, it used to panic and
4662 die if the ioctl to get the interface flags failed. However, it seems that
4663 on at least one OS (Solaris 9) it is possible to have an interface that is
4664 included in the list of interfaces, but for which you get a failure error
4665 for this call. This happens when the interface is not "plumbed" into a
4666 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4667 failure of the "get flags" call assumes that the interface is down.
4669 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4670 makes life easier for people who are doing arithmetic on fields extracted
4671 from dates, where you often get leading zeros that should not be
4672 interpreted as octal.
4674 64. Added qualify_domain to the redirect router, to override the global
4677 65. If a pathologically long header line contained very many addresses (the
4678 report of this problem mentioned 10 000) and each of them was rewritten,
4679 Exim could use up a very large amount of memory. (It kept on making new
4680 copies of the header line as it rewrote, and never released the old ones.)
4681 At the expense of a bit more processing, the header rewriting function has
4682 been changed so that it no longer eats memory in this way.
4684 66. The generation of the Received: header has been moved from the time that a
4685 message starts to be received, to the time that it finishes. The timestamp
4686 in the Received: header should now be very close to that of the <= log
4687 line. There are two side-effects of this change:
4689 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4690 logged header lines no longer include the local Received: line, because
4691 it has not yet been created. The same applies to a copy of the message
4692 that is returned to a non-SMTP sender when a message is rejected.
4694 (b) When a filter file is tested using -bf, no additional Received: header
4695 is added to the test message. After some thought, I decided that this
4698 This change does not affect the value of $received_for. It is still set
4699 after address rewriting, but before local_scan() is called.
4701 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4703 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4704 gave an unhelpful panic error message, and a defer error. I have managed to
4705 change this behaviour so that it now rejects any supplied certificate,
4706 which seems right, as the list of acceptable certificates is empty.
4708 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4709 gave an unhelpful defer error. I have not managed to make this reject any
4710 supplied certificates, but the error message it gives is "no certificate
4711 supplied", which is not helpful.
4713 70. exigrep's output now also includes lines that are not associated with any
4714 message, but which match the given pattern. Implemented by a patch from
4715 Martin Sluka, which also tidied up the Perl a bit.
4717 71. Recipient callout verification, like sender verification, was using <> in
4718 the MAIL FROM command. This isn't really the right thing, since the actual
4719 sender may affect whether the remote host accepts the recipient or not. I
4720 have changed it to use the actual sender in the callout; this means that
4721 the cache record is now keyed on a recipient/sender pair, not just the
4722 recipient address. There doesn't seem to be a real danger of callout loops,
4723 since a callout by the remote host to check the sender would use <>.
4724 [SEE ABOVE: changed after hitting problems.]
4726 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4727 temporary errors. However, in the case of such a code being given after
4728 the end of a data transmission (i.e. after ".") Exim was failing to write
4729 a retry record for the message. (Yes, there was some broken host that was
4730 actually sending 8xx at this point.)
4732 73. An unknown lookup type in a host list could cause Exim to panic-die when
4733 the list was checked. (An example that provoked this was putting <; in the
4734 middle of a list instead of at the start.) If this happened during a DATA
4735 ACL check, a -D file could be left lying around. This kind of configuration
4736 error no longer causes Exim to die; instead it causes a defer errror. The
4737 incident is still logged to the main and panic logs.
4739 74. Buglet left over from Exim 3 conversion. The message "too many messages
4740 in one connection" was written to the rejectlog but not the mainlog, except
4741 when address rewriting (yes!) was being logged.
4743 75. Added write_rejectlog option.
4745 76. When a system filter was run not as root (that is, when system_filter_user
4746 was set), the values of the $n variables were not being returned to the
4747 main process; thus, they were not subsequently available in the $sn
4750 77. Added +return_path_on_delivery log selector.
4752 78. A connection timeout was being treated differently from recipients deferred
4753 when testing hosts_max_try with a message that was older than the host's
4754 retry timeout. (The host should not be counted, thus allowing all hosts to
4755 be tried at least once before bouncing.) This may have been the cause of an
4756 occasionally reported bug whereby a message would remain on the queue
4757 longer than the retry timeout, but would be bounced if a delivery was
4758 forced. I say "may" because I never totally pinned down the problem;
4759 setting up timeout/retry tests is difficult. See also the next item.
4761 79. The ultimate address timeout was not being applied to errors that involved
4762 a combination of host plus message (for example, a timeout on a MAIL
4763 command). When an address resolved to a number of possible hosts, and they
4764 were not all tried for each delivery (e.g. because of hosts_max_try), a
4765 message could remain on the queue longer than the retry timeout.
4767 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4770 81. Fixed an obscure SMTP outgoing bug which required at least the following
4771 conditions: (a) there was another message waiting for the same server;
4772 (b) the server returned 5xx to all RCPT commands in the first message so
4773 that the message was not completed; (c) the server dropped the connection
4774 or gave a negative response to the RSET that Exim sends to abort the
4775 transaction. The observed case was a dropped connection after DATA that had
4776 been sent in pipelining mode. That is, the server had advertised PIPELINING
4777 but was not implementing it correctly. The effect of the bug was incorrect
4778 behaviour, such as trying another host, and this could lead to a crash.
4784 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4785 and daemon.c were passed as pointers to ints; they should have been
4786 pointers to socklen_t variables (which are typically unsigned ints).
4788 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4791 3. Fixed a really odd bug that affected only the testing scheme; patching a
4792 certain fixed string in the binary changed the value of another string that
4793 happened to be identical to the end of the original first string.
4795 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4796 name", it returns that address as the IP address. On some operating
4797 systems (e.g. Solaris), it also passes back the IP address string as the
4798 "host name". However, on others (e.g. Linux), it passes back an empty
4799 string. Exim wasn't checking for this, and was changing the host name to an
4800 empty string, assuming it had been canonicized.
4802 5. Although rare, it is permitted to have more than one PTR record for a given
4803 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4804 all the names associated with an address, because they do in Solaris.
4805 However, it seems that they do not in Linux for data that comes from the
4806 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4807 I found this out when I moved to a new Linux workstation and tried to run
4808 the Exim test suite.
4810 To get round this problem I have changed the code so that it now does its
4811 own call to the DNS to look up PTR records when searching for a host name.
4812 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4813 addresses that are only in /etc/hosts are still found.
4815 This behaviour is, however, controlled by an option called host_lookup_
4816 order, which defaults to "bydns:byaddr". If people want to use the other
4817 order, or indeed, just use one or the other means of lookup, they can
4818 specify it in this variable.
4820 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4821 some operating systems, this comes back from gethostbyaddr() as an empty
4822 string, and this is what Exim used to test for. However, it seems that in
4823 other systems, "." is yielded. Exim now tests for this case too.
4825 7. The values of check_spool_space and check_log_space are now held internally
4826 as a number of kilobytes instead of an absolute number of bytes. If a
4827 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4828 kilobyte. This means that much larger values can be stored.
4830 8. Exim monitor: an attempt to get the action menu when not actually pointing
4831 at a message produces an empty menu entitled "No message selected". This
4832 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4833 no entries in it ("Shell widget menu has zero width and/or height"). So I
4834 have added a single, blank menu entry in this case.
4836 9. Added ${quote_local_part.
4838 10. MIME decoding is now applied to the contents of Subject: header lines when
4841 11. Now that a reference to $sender_host_address automatically causes a reverse
4842 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4843 host lookup before query-style lookups in lists that might use this
4844 variable. This has therefore been abolished, and the "net-" prefix is no
4845 longer necessary for query-style lookups.
4847 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4848 have been a typo for LFLAGS, so it has been changed.
4850 13. The install script calls Exim with "-C /dev/null" in order to find the
4851 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4852 to be output. Howeve, since Exim outputs its version number before the
4853 error, it didn't break the script. It just looked ugly. I fixed this by
4854 always allowing "-C /dev/null" if the caller is root.
4856 14. Ignore overlarge ACL variable number when reading spool file - insurance
4857 against a later release with more variables having written the file.
4859 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4860 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4861 this, as well as the form without the "IPv6" on the front.
4863 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4864 OS/Makefile-Darwin file.
4866 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4867 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4869 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4870 variable. However, some OS use ints for inodes. I've added cast to long int
4871 to get rid of the compiler warning.
4873 19. I had forgotten to lock out "/../" in configuration file names when
4874 ALT_CONFIG_PREFIX was set.
4876 20. Routers used for verification do not need to specify transports. However,
4877 if such a router generated a host list, and callout was configured, Exim
4878 crashed, because it could not find a port number from the (non-existent)
4879 transport. It now assumes port 25 in this circumstance.
4881 21. Added the -t option to exigrep.
4883 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4884 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4885 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4886 them is set, LOOKUP_LSEARCH is forced.
4888 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4890 24. Added sender and host information to the "rejected by local_scan()" log
4891 line; previously there was no indication of these.
4893 25. Added .include_if_exists.
4895 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4896 Linux. It turns out that not all file systems support this. Apparently some
4897 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4898 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4899 not supported on the file descriptor, is now ignored when Exim is trying to
4900 sync a directory. This applies only to Linux.
4902 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4904 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4905 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4908 29. Added support for maildirsize files from supplied patch (modified a bit).
4910 30. The use of :fail: followed by an empty string could lead Exim to respond to
4911 sender verification failures with (e.g.):
4913 550 Verification failed for <xxx>
4914 550 Sender verify failed
4916 where the first response line was missing the '-' that indicates it is not
4917 the final line of the response.
4919 31. The loop for finding the name of the user that called Exim had a hardwired
4920 limit of 10; it now uses the value of finduser_retries, which is used for
4921 all other user lookups.
4923 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4926 33. Exim was neglecting to zero errno before one call of strtol() when
4927 expanding a string and expecting an integer value. On some systems this
4928 resulted in spurious "integer overflow" errors. Also, it was casting the
4929 result into an int without checking.
4931 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4932 did not work. The code looks as if it has *never* worked, though it appears
4933 to have been documented since at least releast 1.62. I have made it work.
4935 35. The "timeout_DNS" error in retry rules, also documented since at least
4936 1.62, also never worked. As it isn't clear exactly what this means, and
4937 clearly it isn't a major issue, I have abolished the feature by treating it
4938 as "timeout", and writing a warning to the main and panic logs.
4940 36. The display of retry rules for -brt wasn't always showing the error code
4943 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4944 timeout_connect_A, timeout_connect_MX.
4946 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4947 to the empty sender.
4949 39. The daemon was not analysing the content of -oX till after it had closed
4950 stderr and disconnected from the controlling terminal. This meant that any
4951 syntax errors were only noted on the panic log, and the return code from
4952 the command was 0. By re-arranging the code a little, I've made the
4953 decoding happen first, so such errors now appear on stderr, and the return
4954 code is 1. However, the actual setting up of the sockets still happens in
4955 the disconnected process, so errors there are still only recorded on the
4958 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4959 connections (as happens on some IP stacks) was logged at start up time as
4960 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4961 it from "IPv6 and IPv4", which means that two separate sockets are being
4964 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4965 says whether AF_INET or AF_INET6 was passed as an argument.
4967 42. Exiwhat output was messed up when time zones were included in log
4970 43. Exiwhat now gives more information about the daemon's listening ports,
4971 and whether -tls-on-connect was used.
4973 44. The "port" option of the smtp transport is now expanded.
4975 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4976 silently ignored. Now an error message is written to the main and panic
4979 46. There's a new ACL modifier called "logwrite" which writes to a log file
4980 as soon as it is encountered.
4982 47. Added $local_user_uid and $local_user_gid at routing time.
4984 48. Exim crashed when trying to verify a sender address that was being
4987 49. Exim was recognizing only a space character after ".include". It now also
4988 recognizes a tab character.
4990 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4991 extracting the relevant information from the specification. The man page no
4992 longer contains scrambled data for the -d option, and I've added a section
4993 at the front about calling Exim under different names.
4995 51. Added "extra_headers" argument to the "mail" command in filter files.
4997 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5000 53. Installed eximstats 1.29.
5002 54. Added transport_filter_timeout as a generic transport option.
5004 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5005 Cc: header lines. This was required by RFC 822, but it not required by RFC
5008 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5009 incoming messages that did not have them. Now it does so only if the
5010 message originates locally, that is, if there is no associated remote host
5011 address. When Resent- header lines are present, this applies to the Resent-
5012 lines rather than the non-Resent- lines.
5014 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5015 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5017 58. Messages for configuration errors now include the name of the main
5018 configuration file - useful now that there may be more than one file in a
5019 list (.included file names were always shown).
5021 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5022 for those rare installations that do not start the daemon as root or run it
5023 setuid root. I've cut out the call to initgroups() if the daemon is not
5026 60. The Exim user and group can now be bound into the binary as text strings
5027 that are looked up at the start of Exim's processing.
5029 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5031 62. Added $mailstore_basename variable.
5033 63. Installed patch to sieve.c from Michael Haardt.
5035 64. When Exim failed to open the panic log after failing to open the main log,
5036 the original message it was trying to log was written to stderr and debug
5037 output, but if they were not available (the usual case in production), it
5038 was lost. Now it is written to syslog before the two lines that record the
5039 failures to open the logs.
5041 65. Users' Exim filters run in subprocesses under the user's uid. It is
5042 possible for a "deliver" command or an alias in a "personal" command to
5043 provoke an address rewrite. If logging of address rewriting is configured,
5044 this fails because the process is not running as root or exim. There may be
5045 a better way of dealing with this, but for the moment (because 4.30 needs
5046 to be released), I have disabled address rewrite logging when running a
5047 filter in a non-root, non-exim process.
5053 1. The buildconfig auxiliary program wasn't quoting the value set for
5054 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5055 not defined. This bug was masked in 4.22 by the effect that was fixed in
5058 2. Some messages that were rejected after a message id was allocated were
5059 shown as "incomplete" by exigrep. It no longer does this for messages that
5060 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5062 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5063 have allow_domain_literals set, the ID did not get logged in the <= line.
5064 Domain literals are now always recognized in Message-ID: header lines.
5066 4. The first argument for a ${extract expansion item is the key name or field
5067 number. Leading and trailing spaces in this item were not being ignored,
5068 causing some misleading effects.
5070 5. When deliver_drop_privilege was set, single queue runner processes started
5071 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5072 same command in the process it spins off) were not dropping privilege.
5074 6. When the daemon running as "exim" started a queue runner, it always
5075 re-executed Exim in the spun-off process. This is a waste of effort when
5076 deliver_drop_privilege is set. The new process now just calls the
5077 queue-runner function directly.
5083 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5086 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5087 ignored. Though the use of -oP was forcing the writing of a pid file, it
5088 was always written to the default place.
5090 3. If the message "no IP address found for host xxxx" is generated during
5091 incoming verification, it is now followed by identification of the incoming
5092 connection (so you can more easily find what provoked it).
5094 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5096 5. Added some features to "harden" Exim a bit more against certain attacks:
5098 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5099 be put in Local/Makefile. This is like the never_users runtime option,
5100 but it cannot be overridden. The default setting is "root".
5102 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5103 prefix string with which any file named in a -C command line option
5106 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5107 is retained for -C and -D only if the caller of Exim is root. Without
5108 it, the exim user may also use -C and -D and retain privilege.
5110 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5111 command line option is disabled.
5113 6. Macro names set by the -D option must start with an upper case letter, just
5114 like macro names defined in the configuration file.
5116 7. Added "dereference=" facility to LDAP.
5118 8. Two instances of the typo "uknown" in the source files are fixed.
5120 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5121 the Configure-Makefile script screwed up while processing it.
5123 10. Incorporated PCRE 4.4.
5125 11. The SMTP synchronization check was not operating right at the start of an
5126 SMTP session. For example, it could not catch a HELO sent before the client
5127 waited for the greeting. There is now a check for outstanding input at the
5128 point when the greeting is written. Because of the duplex, asynchronous
5129 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5130 way, but not yet received, when the check is performed.
5132 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5133 on TCP/IP sockets, because this apparently causes some broken clients to
5136 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5137 unchanged) from the Cygwin maintainer.
5139 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5140 was supported instead of testing for mbx. Effectively a typo.
5142 15. The spa authenticator server code was not checking that the input it
5143 received was valid base64.
5145 16. The debug output line for the "set" modifier in ACLs was not showing the
5146 name of the variable that was being set.
5148 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5150 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5151 lookup on its own. Something else was needed to trigger the lookup. For
5152 example, a match in host_lookup or the need for a host name in a host list.
5153 Now, if $sender_host_name is referenced and the host name has not yet been
5154 looked up, a lookup is performed. If the lookup fails, the variable remains
5155 empty, and $host_lookup_failed is set to "1".
5157 19. Added "eqi" as a case-independent comparison operator.
5159 20. The saslauthd authentication condition could segfault if neither service
5160 nor realm was specified.
5162 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5163 error message that was logged was misleading, and incoming SMTP
5164 connections were dropped. The message is now more accurate, and temporary
5165 errors are given to SMTP connections.
5167 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5168 (except RSET) with a 421 error, until QUIT is received. However, it was
5169 failing to send a response to QUIT.
5171 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5172 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5173 ACL is now run after the helo_try_verify_hosts code.
5175 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5176 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5177 case-independent, so other case variants are also recognized). Apparently
5178 some systems use these upper case variants.
5180 25. If more than two messages were waiting for the same host, and a transport
5181 filter was specified for the transport, Exim sent two messages over the
5182 same TCP/IP connection, and then failed with "socket operation on non-
5183 socket" when it tried to send the third.
5185 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5187 27. The extern definition of crypt16() in expand.c was not being excluded when
5188 the OS had its own crypt16() function.
5190 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5191 as a preferred synonym for return_size_limit, both as an option and as an
5194 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5196 30. Changed the default configuration ACL to relax the local part checking rule
5197 for addresses that are not in any local domains. For these addresses,
5198 slashes and pipe symbols are allowed within local parts, but the sequence
5199 /../ is explicitly forbidden.
5201 31. SPA server authentication was not clearing the challenge buffer before
5204 32. log_message in a "warn" ACL statement was writing to the reject log as
5205 well as to the main log, which contradicts the documentation and doesn't
5206 seem right (because no rejection is happening). So I have stopped it.
5208 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5209 However, I am unable to do any testing of this.
5211 34. Fixed an infelicity in the appendfile transport. When checking directories
5212 for a mailbox, to see if any needed to be created, it was accidentally
5213 using path names with one or more superfluous leading slashes; tracing
5214 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5216 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5217 contents are added to the log line that is written for every discarded
5218 recipient. (Previously a log_message setting was ignored.)
5220 36. The ${quote: operator now quotes the string if it is empty.
5222 37. The install script runs exim in order to find its version number. If for
5223 some reason other than non-existence or emptiness, which it checks, it
5224 could not run './exim', it was installing it with an empty version number,
5225 i.e. as "exim-". This error state is now caught, and the installation is
5228 38. An argument was missing from the function that creates an error message
5229 when Exim fails to connect to the socket for saslauthd authentication.
5230 This could cause Exim to crash, or give a corrupted message.
5232 39. Added isip, isip4, and isip6 to ${if conditions.
5234 40. The ACL variables $acl_xx are now saved with the message, and can be
5235 accessed later in routers, transports, and filters.
5237 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5238 strings in the file are not string-expanded.
5240 42. If a MAIL command specified a SIZE value that was too large to fit into an
5241 int variable, the check against message_size_limit failed. Such values are
5242 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5243 day this will have to be increased, but I don't think I want to be around
5244 when emails are that large.
5251 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5252 iconv() is not standard in FreeBSD.
5254 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5255 IPv6 enabled. The observed symptom was a segmentation fault on return from
5256 the function os_common_find_running_interfaces() in src/os.c.
5258 3. In the check_special_case() function in daemon.c I had used "errno" as an
5259 argument name, which causes warnings on some systems. This was basically a
5260 typo, since it was named "eno" in the comments!
5262 4. The code that waits for the clock to tick (at a resolution of some fraction
5263 of a second) so as to ensure message-id uniqueness was always waiting for
5264 at least one whole tick, when it could have waited for less. [This is
5265 almost certainly not relevant at current processor speeds, where it is
5266 unlikely to ever wait at all. But we try to future-proof.]
5268 5. The function that sleeps for a time interval that includes fractions of a
5269 second contained a race. It did not block SIGALRM between setting the
5270 timer, and suspending (a couple of lines later). If the interval was short
5271 and the sigsuspend() was delayed until after it had expired, the suspension
5272 never ended. On busy systems this could lead to processes getting stuck for
5275 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5276 process, before it forks any delivery processes. The open lookup caching
5277 mechanism meant that the open file or database connection was passed into
5278 the delivery process. The problem was that delivery processes always tidy
5279 up cached lookup data. This could cause a problem for the next delivery
5280 process started by the queue runner, because the external queue runner
5281 process does not know about the closure. So the next delivery process
5282 still has data in the lookup cache. In the case of a file lookup, there was
5283 no problem because closing a file descriptor in a subprocess doesn't affect
5284 the parent. However, if the lookup was caching a connection to a database,
5285 the connection was closed, and the second delivery process was likely to
5286 see errors such as "PGSQL: query failed: server closed the connection
5287 unexpectedly". The problem has been fixed by closing all cached lookups
5288 in a queue runner before running a delivery process.
5290 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5291 seem to have the "const" qualifier which it has on other OS. I've
5294 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5295 *of the same type* (client or server) with the same public name that an
5296 error should be diagnosed.
5298 9. When Exim looked up a host name for an IP address, but failed to find the
5299 original IP address when looking up the host name (a safety check), it
5300 output the message "<ip address> does not match any IP for NULL", which was
5301 confusing, to say the least. The bug was that the host name should have
5302 appeared instead of "NULL".
5304 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5305 user that is built into the binary, and the -C or -D options is used, root
5306 privilege is dropped before the configuration file is read. In addition,
5307 logging is switched to stderr instead of the normal log files. If the
5308 configuration then re-defines the Exim user, the unprivileged environment
5309 is probably not what is expected, so Exim logs a panic warning message (but
5312 However, if deliver_drop_privilege is set, the unprivileged state may well
5313 be exactly what is intended, so the warning has been cut out in that case,
5314 and Exim is allowed to try to write to its normal log files.
5320 1. smtp_return_error_details was not giving details for temporary sender
5321 or receiver verification errors.
5323 2. Diagnose a configuration error if two authenticators have the same public
5326 3. Exim used not to create the message log file for a message until the first
5327 delivery attempt. This could be confusing when incoming messages were held
5328 for policy or load reasons. The message log file is now created at the time
5329 the message is received, and an initial "Received" line is written to it.
5331 4. The automatically generated man page for command line options had a minor
5332 bug that caused no ill effects; however, a more serious problem was that
5333 the procedure for building the man page automatically didn't always
5334 operate. Consequently, release 4.20 contains an out-of-date version. This
5335 shouldn't happen again.
5337 5. When building Exim with embedded Perl support, the script that builds the
5338 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5339 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5341 6. The freeze_tell option was not being used for messages that were frozen on
5342 arrival, either by an ACL or by local_scan().
5344 7. Added the smtp_incomplete_transaction log selector.
5346 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5347 was accepting AUTH without a new EHLO.
5349 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5350 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5353 10. Logging of TCP/IP connections (when configured) now happens in the main
5354 daemon process instead of the child process, so that the TCP/IP connection
5355 count is more accurate (but it can never be perfect).
5357 11. The use of "drop" in a nested ACL was not being handled correctly in the
5358 outer ACL. Now, if condition failure induced by the nested "drop" causes
5359 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5360 or "require"), the connection is dropped.
5362 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5363 that yield "discard" can now be used with an "accept" or a "discard" verb,
5364 but an error is generated for any others (because I can't see a useful way
5365 to define what should happen).
5367 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5368 are now processed in the same way as lines in the Exim configuration file.
5369 In particular, continuation lines are supported.
5371 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5373 15. Added -ti meaning -t -i.
5375 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5376 domains, and warn by logging if others are found.
5378 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5379 returned from GIFCONF when Exim is trying to find the list of interfaces on
5380 a host. The code in os.c has been modified to copy each ifreq to an aligned
5381 structure in all cases.
5383 Also, in some cases, the returned ifreq's were being copied to a 'struct
5384 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5385 means the last couple of bytes of an IPv6 address could be chopped if the
5386 ifreq contained only a normal sockaddr (14 bytes storage).
5388 18. Named domain lists were not supported in the hosts_treat_as_local option.
5389 An entry such as +xxxx was not recognized, and was treated as a literal
5392 19. Ensure that header lines added by a DATA ACL are included in the reject log
5393 if the ACL subsequently rejects the message.
5395 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5396 MD5 (which is deprecated).
5398 21. When testing a filter file using -bf, Exim was writing a message when it
5399 took the sender from a "From " line in the message, but it was not doing so
5400 when it took $return_path from a Return-Path: header line. It now does.
5402 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5403 with a valid header line field name (a series of printing characters
5404 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5406 23. Changed "disc" in the source to "disk" to conform to the documentation and
5407 the book and for uniformity.
5409 24. Ignore Sendmail's -Ooption=value command line item.
5411 25. When execve() failed while trying to run a command in a pipe transport,
5412 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5413 could be confused with a return value of 69 from the command itself. This
5414 has been changed to 127, the value the shell returns if it is asked to run
5415 a non-existent command. The wording for the related log line suggests a
5416 non-existent command as the problem.
5418 26. If received_header_text expands to an empty string, do not add a Received:
5419 header line to the message. (Well, it adds a token one on the spool, but
5420 marks it "old" so that it doesn't get used or transmitted.)
5422 27. Installed eximstats 1.28 (addition of -nt option).
5424 28. There was no check for failure on the call to getsockname() in the daemon
5425 code. This can fail if there is a shortage of resources on the system, with
5426 ENOMEM, for example. A temporary error is now given on failure.
5428 29. Contrary to the C standard, it seems that in some environments, the
5429 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5430 program. Exim now does this explicitly; it affects the formatting of
5431 timestamps using strftime().
5433 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5434 complaints. I've now initialized all the variables, to avoid this.
5436 32. Header lines added by a system filter were not being "seen" during
5437 transport-time rewrites.
5439 33. The info_callback() function passed to OpenSSL is set up with type void
5440 (*)(SSL *, int, int), as described somewhere. However, when calling the
5441 function (actually a macro) that sets it up, the type void(*)() is
5442 expected. I've put in a cast to prevent warnings from picky compilers.
5444 34. If a DNS black list lookup found a CNAME record, but there were no A
5445 records associated with the domain it pointed at, Exim crashed.
5447 35. If a DNS black list lookup returned more than one A record, Exim ignored
5448 all but the first. It now scans all returned addresses if a particular IP
5449 value is being sought. In this situation, the contents of the
5450 $dnslist_value variable are a list of all the addresses, separated by a
5453 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5454 to accept a host name and all its aliases if the forward lookup for any of
5455 them yielded the IP address of the incoming connection. Now it accepts only
5456 those names whose forward lookup yields the correct IP address. Any other
5457 names are discarded. This closes a loophole whereby a rogue DNS
5458 administrator could create reverse DNS records to break through a
5459 wildcarded host restriction in an ACL.
5461 37. If a user filter or a system filter that ran in a subprocess used any of
5462 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5463 the wrong values were passed to the pipe command ($thisaddress had the
5464 value of $0, $0 had the value of $1, etc). This bug was introduced by
5465 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5467 38. Improved the line breaking for long SMTP error messages from ACLs.
5468 Previously, if there was no break point between 40 and 75 characters, Exim
5469 left the rest of the message alone. Two changes have been made: (a) I've
5470 reduced the minimum length to 35 characters; (b) if it can't find a break
5471 point between 35 and 75 characters, it looks ahead and uses the first one
5472 that it finds. This may give the occasional overlong line, but at least the
5473 remaining text gets split now.
5475 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5476 file descriptors might be low, and that setting 1000 would always raise it.
5477 It turns out that in some environments, the limit is already over 1000 and
5478 that lowering it causes trouble. So now Exim takes care not to decrease it.
5480 40. When delivering a message, the value of $return_path is set to $sender_
5481 address at the start of routing (routers may change the value). By an
5482 oversight, this default was not being set up when an address was tested by
5483 -bt or -bv, which affected the outcome if any router or filter referred to
5486 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5487 log only when "message" or "log_message" are set. However, if one of the
5488 conditions was an address verification, or a call to a nested ACL, the
5489 messages generated by the underlying test were being passed through. This
5490 no longer happens. The underlying message is available in $acl_verify_
5491 message for both "message" and "log_message" expansions, so it can be
5492 passed through if needed.
5494 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5495 new expansion $bh_ to give the encoded byte string without charset
5496 translation. Translation happens only if iconv() is available; HAVE_ICONV
5497 indicates this at build time. HEADERS_CHARSET gives the charset to
5498 translate to; headers_charset can change it in the configuration, and
5499 "headers charset" can change it in an individual filter file.
5501 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5502 that creates RFC 2047 encoded "words" labels them as that charset instead
5503 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5504 expansion operator; (ii) when Exim creates a From: line for a local
5505 message; (iii) when a header line is rewritten to include a "phrase" part.
5507 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5508 buggy, causing it to skip the first lines of messages whose message ID
5509 ended in 'D'. This would not have bitten before Exim release 4.14, because
5510 message IDs were unlikely to end in 'D' before then. The effect was to have
5511 incorrect size information for certain domains.
5513 45. #include "config.h" was missing at the start of the crypt16.c module. This
5514 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5517 46. If there was a timeout during a "random" callout check, Exim treated it as
5518 a failure of the random address, and carried on sending RSET and the real
5519 address. If the delay was just some slowness somewhere, the response to the
5520 original RCPT would be taken as a response to RSET and so on, causing
5521 mayhem of various kinds.
5523 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5524 when I implemented it. It didn't allow for the fact that some option values
5525 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5526 the right test for positive values.
5528 48. Domain names in DNS records are case-independent. Exim always looks them up
5529 in lower case. Some resolvers return domain names in exactly the case they
5530 appear in the zone file, that is, they may contain uppercase letters. Not
5531 all resolvers do this - some return always lower case. Exim was treating a
5532 change of case by a resolver as a change of domain, similar to a widening
5533 of a domain abbreviation. This triggered its re-routing code and so it was
5534 trying to route what was effectively the same domain again. This normally
5535 caused routing to fail (because the router wouldn't handle the domain
5536 twice). Now Exim checks for this case specially, and just changes the
5537 casing of the domain that it ultimately uses when it transmits the message
5540 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5543 50. If a filter generated a file delivery with a non-absolute name (possible if
5544 no home directory exists for the router), the forbid_file option was not
5547 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5548 the existing equality matching.
5550 52. Exim was using ints instead of ino_t variables in some places where it was
5551 dealing with inode numbers.
5553 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5554 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5555 called TMPDIR, and if it finds it is different, it changes its value.
5557 54. The smtp_printf() function is now made available to local_scan() so
5558 additional output lines can be written before returning. There is also an
5559 smtp_fflush() function to enable the detection of a dropped connection.
5560 The variables smtp_input and smtp_batched_input are exported to
5563 55. Changed the default runtime configuration: the message "Unknown user"
5564 has been removed from the ACL, and instead placed on the localuser router,
5565 using the cannot_route_message feature. This means that any verification
5566 failures that generate their own messages won't get overridden. Similarly,
5567 the "Unrouteable address" message that was in the ACL for unverifiable
5568 relay addresses has also been removed.
5570 56. Added hosts_avoid_esmtp to the smtp transport.
5572 57. The exicyclog script was not checking for the esoteric option
5573 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5574 will work only if exicyclog is run under the appropriate euid.
5576 58. Following a discussion on the list, the rules by which Exim recognises line
5577 endings on incoming messages have been changed. The -dropcr and drop_cr
5578 options are now no-ops, retained only for backwards compatibility. The
5579 following line terminators are recognized: LF CRLF CR. However, special
5580 processing applies to CR:
5582 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5583 nor a local message in the state where . is a terminator.
5585 (ii) If a bare CR is encountered in a header line, an extra space is added
5586 after the line terminator so as not to end the header. The reasoning
5587 behind this is that bare CRs in header lines are most likely either
5588 to be mistakes, or people trying to play silly games.
5590 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5591 was being incorrectly given as 18 bytes larger than it should have been.
5592 This is a VOB (very old bug).
5594 60. This may never have affected anything current, but just in case it has:
5595 When the local host is found other than at the start of a list of hosts,
5596 the local host, those with the same MX, and any that follow, are discarded.
5597 When the list in question was part of a longer list of hosts, the following
5598 hosts (not currently being processed) were also being discarded. This no
5599 longer happens. I'm not sure if this situation could ever has previously
5602 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5605 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5606 header. This is something that is recommended in a new Internet Draft, and
5607 is something that is documented as being done by Sendmail. There are two
5608 possible values. For messages generated by the autoreply transport, Exim
5611 Auto-Submitted: auto-replied
5613 whereas for all other generated messages (e.g. bounces) it adds
5615 Auto-Submitted: auto-generated
5617 63. The "personal" condition in filters now includes a test for the
5618 Auto-Submitted: header. If it contains the string "auto-" the message it
5619 not considered personal.
5621 64. Added rcpt_include_affixes as a generic transport option.
5623 65. Added queue_only_override (default true).
5625 66. Added the syslog_duplication option.
5627 67. If what should have been the first header line of a message consisted of
5628 a space followed by a colon, Exim was mis-interpreting it as a header line.
5629 It isn't of course - it is syntactically invalid and should therefore be
5630 treated as the start of the message body. The misbehaviour could have
5631 caused a number of strange effects, including loss of data in subsequent
5632 header lines, and spool format errors.
5634 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5635 client host had authenticated. This control can now be exercised by an ACL
5636 for more flexibility.
5638 69. By default, callouts do not happen when testing with -bh. There is now a
5639 variant, -bhc, which does actually run the callout code, including
5640 consulting and updating the callout cache.
5642 70. Added support for saslauthd authentication, courtesy of Alexander
5645 71. If statvfs() failed on the spool or log directories while checking their
5646 size for availability, Exim confusingly gave the error "space shortage".
5647 Furthermore, in debugging mode it crashed with a floating point exception.
5648 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5649 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5650 serious problem, Exim now writes to the main and panic logs when this
5651 happens, with details of the failure. It then refuses to accept the
5652 incoming message, giving the message "spool directory problem" or "log
5653 directory problem" with a 421 code for SMTP messages.
5655 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5656 0, 1, and 2 exist, because some OS complain for execs without them (see
5657 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5658 descriptors. However, the code omitted to check that the open succeeded,
5659 causing mysterious errors if for some reason the permissions on /dev/null
5660 got screwed. Now Exim writes a message to the main and panic logs, and
5661 bombs out if it can't open /dev/null.
5663 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5664 interact so that it is all more flexible. It is supposed to remain
5665 backwards compatible. Also added extra_local_interfaces.
5667 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5668 to bomb out with an assertion failure - to the client this appears as a
5669 connection drop. This problem occurs in the part of the code that was taken
5670 from the Samba project. Fortunately, the assertion is in a very simple
5671 function, so I have fixed this by reproducing the function inline in the
5672 one place where it is called, and arranging for authentication to fail
5673 instead of killing the process with assert().
5675 75. The SPA client code was not working when the server requested OEM rather
5676 than Unicode encoding.
5678 76. Added code to make require_files with a specific uid setting more usable in
5679 the case where statting the file as root fails - usually a non-root-mounted
5680 NFS file system. When this happens and the failure is EACCES, Exim now
5681 forks a subprocess and does the per-uid checking as the relevant uid.
5683 77. Added process_log_path.
5685 78. If log_file_path was not explicitly set, a setting of check_log_space or
5686 check_log_inodes was ignored.
5688 79. If a space check for the spool or log partitions fails, the incident is now
5689 logged. Of course, in the latter case the data may get lost...
5691 80. Added the %p formatting code to string_format() so that it can be used to
5692 print addresses in debug_print(). Adjusted all the address printing in the
5693 debugging in store.c to use %p rather than %d.
5695 81. There was a concern that a line of code in smtp_in.c could overflow a
5696 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5697 initially expressed, the concern was not well-founded, because trailing
5698 spaces are removed early. However, if the trailing spaces were followed by
5699 a NULL, they did not get removed, so the overflow was possible. Two fixes
5702 (a) I re-wrote the offending code in a cleaner fashion.
5703 (b) If an incoming SMTP command contains a NULL character, it is rejected
5706 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5707 runs initgroups(), so that if the Exim user is in any additional groups,
5708 they will be used during message reception.
5714 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob