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 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
38 JH/02 Support "G" suffix to numbers in ${if comparisons.
40 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
42 NM/01 Buzilla 1197 - Spec typo
47 PP/01 Handle short writes when writing local log-files.
48 In practice, only affects FreeBSD (8 onwards).
49 Bugzilla 1053, with thanks to Dmitry Isaikin.
51 NM/01 Bugzilla 949 - Documentation tweak
53 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
56 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
58 PP/02 Implemented gsasl authenticator.
60 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
62 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
63 `pkg-config foo` for cflags/libs.
65 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
66 with rest of GSASL and with heimdal_gssapi.
68 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
69 `pkg-config foo` for cflags/libs for the TLS implementation.
71 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
72 properties get this fed in as external SSF. A number of robustness
73 and debugging improvements to the cyrus_sasl authenticator.
75 PP/08 cyrus_sasl server now expands the server_realm option.
77 PP/09 Bugzilla 1214 - Log authentication information in reject log.
78 Patch by Jeremy Harris.
80 PP/10 Added dbmjz lookup type.
82 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
84 PP/12 MAIL args handles TAB as well as SP, for better interop with
85 non-compliant senders.
86 Analysis and variant patch by Todd Lyons.
88 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
89 Bug report from Lars Müller <lars@samba.org> (via SUSE),
90 Patch from Dirk Mueller <dmueller@suse.com>
92 PP/13 tls_peerdn now print-escaped for spool files.
93 Observed some $tls_peerdn in wild which contained \n, which resulted
94 in spool file corruption.
96 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
97 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
98 or write after TLS renegotiation, which otherwise led to messages
101 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
102 as a tracking header (ie: a signed header comes before the signature).
103 Patch from Wolfgang Breyha.
105 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
106 comma-sep list; embedded commas doubled.
108 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
110 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
112 Report and patch from Dmitry Banschikov.
114 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
115 Removed SSL_clear() after SSL_new() which led to protocol negotiation
116 failures. We appear to now support TLS1.1+ with Exim.
118 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
119 lets Exim select keys and certificates based upon TLS SNI from client.
120 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
121 before an outbound SMTP session. New log_selector, +tls_sni.
123 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
124 NULL dereference. Report and patch from Alun Jones.
126 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
127 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
128 Not seeing resolver debug output on NetBSD, but suspect this is a
129 resolver implementation change.
131 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
132 Left warnings. Added "eximon gdb" invocation mode.
134 PP/21 Defaulting "accept_8bitmime" to true, not false.
136 PP/22 Added -bw for inetd wait mode support.
138 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
139 locate the relevant includes and libraries. Made this the default.
141 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
142 Bugzilla 1246, report and most of solution from Tomasz Kusy.
144 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
145 This may cause build issues on older platforms.
147 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
148 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
149 gnutls_require_mac & gnutls_require_protocols (no longer supported).
150 Added SNI support via GnuTLS too.
151 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
153 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
155 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
156 Applied second patch from Janne, implementing suggestion to default
157 multiple-strings-in-record handling to match SPF spec.
159 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
161 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
162 read-only, out of scope).
163 Patch from Wolfgang Breyha, report from Stuart Northfield.
165 PP/29 Fix three issues highlighted by clang analyser static analysis.
166 Only crash-plausible issue would require the Cambridge-specific
167 iplookup router and a misconfiguration.
168 Report from Marcin Mirosław.
170 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
172 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
173 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
174 As part of this, removing so much warning spew let me fix some minor
175 real issues in debug logging.
177 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
178 assignment on my part. Fixed.
180 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
181 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
182 Janne Snabb (who went above and beyond: thank you).
184 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
185 string otherwise requires a connection and a bunch more work and it's
186 relatively easy to get wrong. Should also expose TLS library linkage
189 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
190 64-bit ${eval} (JH/03).
192 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
193 GNU libc to support some of the 64-bit stuff, should not lead to
194 conflicts. Defined before os.h is pulled in, so if a given platform
195 needs to override this, it can.
197 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
198 protection layer was required, which is not implemented.
199 Bugzilla 1254, patch from Wolfgang Breyha.
201 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
202 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
203 tls_dhparam take prime identifiers. Also unbreak combination of
204 OpenSSL+DH_params+TLSSNI.
206 PP/39 Disable SSLv2 by default in OpenSSL support.
212 PP/01 Solaris build fix for Oracle's LDAP libraries.
213 Bugzilla 1109, patch from Stephen Usher.
215 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
217 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
220 TF/02 Fix a couple more cases where we did not log the error message
221 when unlink() failed. See also change 4.74-TF/03.
223 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
224 lock up or crash if it happened to be inside a call to libc when it
225 got a SIGUSR1 from exiwhat.
227 The SIGUSR1 handler appends the current process status to the process
228 log which is later printed by exiwhat. It used to use the general
229 purpose logging code to do this, but several functions it calls are
230 not safe for signals.
232 The new output code in the SIGUSR1 handler is specific to the process
233 log, and simple enough that it's easy to inspect for signal safety.
234 Removing some special cases also simplifies the general logging code.
235 Removing the spurious timestamps from the process log simplifies
238 TF/04 Improved ratelimit ACL condition.
240 The /noupdate option has been deprecated in favour of /readonly which
241 has clearer semantics. The /leaky, /strict, and /readonly update modes
242 are mutually exclusive. The update mode is no longer included in the
243 database key; it just determines when the database is updated. (This
244 means that when you upgrde Exim will forget old rate measurements.)
246 Exim now checks that the per_* options are used with an update mode that
247 makes sense for the current ACL. For example, when Exim is processing a
248 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
249 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
250 must specify per_mail/readonly. If you omit the update mode it defaults to
251 /leaky where that makes sense (as before) or /readonly where required.
253 The /noupdate option is now undocumented but still supported for
254 backwards compatibility. It is equivalent to /readonly except that in
255 ACLs where /readonly is required you may specify /leaky/noupdate or
256 /strict/noupdate which are treated the same as /readonly.
258 A useful new feature is the /count= option. This is a generalization
259 of the per_byte option, so that you can measure the throughput of other
260 aggregate values. For example, the per_byte option is now equivalent
261 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
263 The per_rcpt option has been generalized using the /count= mechanism
264 (though it's more complicated than the per_byte equivalence). When it is
265 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
266 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
267 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
268 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
269 Note that using per_rcpt with a non-readonly update mode in more than
270 one ACL will cause the recipients to be double-counted. (The per_mail
271 and per_byte options don't have this problem.)
273 The handling of very low rates has changed slightly. If the computed rate
274 is less than the event's count (usually one) then this event is the first
275 after a long gap. In this case the rate is set to the same as this event's
276 count, so that the first message of a spam run is counted properly.
278 The major new feature is a mechanism for counting the rate of unique
279 events. The new per_addr option counts the number of different
280 recipients that someone has sent messages to in the last time period. It
281 behaves like per_rcpt if all the recipient addresses are different, but
282 duplicate recipient addresses do not increase the measured rate. Like
283 the /count= option this is a general mechanism, so the per_addr option
284 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
285 example, measure the rate that a client uses different sender addresses
286 with the options per_mail/unique=$sender_address. There are further
287 details in the main documentation.
289 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
291 TF/06 Removed a few PCRE remnants.
293 TF/07 Automatically extract Exim's version number from tags in the git
294 repository when doing development or release builds.
296 PP/02 Raise smtp_cmd_buffer_size to 16kB.
297 Bugzilla 879. Patch from Paul Fisher.
299 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
300 Heavily based on revision 40f9a89a from Simon Arlott's tree.
303 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
305 PP/05 Variable $av_failed, true if the AV scanner deferred.
306 Bugzilla 1078. Patch from John Horne.
308 PP/06 Stop make process more reliably on build failure.
309 Bugzilla 1087. Patch from Heiko Schlittermann.
311 PP/07 Make maildir_use_size_file an _expandable_ boolean.
312 Bugzilla 1089. Patch from Heiko Schlittermann.
314 PP/08 Handle ${run} returning more data than OS pipe buffer size.
315 Bugzilla 1131. Patch from Holger Weiß.
317 PP/09 Handle IPv6 addresses with SPF.
318 Bugzilla 860. Patch from Wolfgang Breyha.
320 PP/10 GnuTLS: support TLS 1.2 & 1.1.
322 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
325 PP/11 match_* no longer expand right-hand-side by default.
326 New compile-time build option, EXPAND_LISTMATCH_RHS.
327 New expansion conditions, "inlist", "inlisti".
329 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
331 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
333 PP/14 fix log_write() format string regression from TF/03.
334 Bugzilla 1152. Patch from Dmitry Isaikin.
340 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
342 PP/02 Harmonised TLS library version reporting; only show if debugging.
343 Layout now matches that introduced for other libraries in 4.74 PP/03.
345 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
347 PP/04 New "dns_use_edns0" global option.
349 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
352 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
353 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
355 TK/01 Updated PolarSSL code to 0.14.2.
356 Bugzilla 1097. Patch from Andreas Metzler.
358 PP/07 Catch divide-by-zero in ${eval:...}.
361 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
364 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
365 format-string attack -- SECURITY: remote arbitrary code execution.
367 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
368 time unintentionally subject to list matching rules, letting the header
369 cause arbitrary Exim lookups (of items which can occur in lists, *not*
370 arbitrary string expansion). This allowed for information disclosure.
372 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
373 INT_MIN/-1 -- value coerced to INT_MAX.
379 NM/01 Workround for PCRE version dependency in version reporting
382 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
383 This fixes portability to compilers other than gcc, notably
384 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
386 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
387 makefiles for portability to HP-UX and POSIX correctness.
389 PP/01 Permit LOOKUP_foo enabling on the make command-line.
390 Also via indented variable definition in the Makefile.
391 (Debugging by Oliver Heesakkers).
393 PP/02 Restore caching of spamd results with expanded spamd_address.
394 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
396 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
397 Improves build reliability. Fix from: Frank Elsner
399 NM/02 Fix wide character breakage in the rfc2047 coding
400 Fixes bug 1064. Patch from Andrey N. Oktyabrski
402 NM/03 Allow underscore in dnslist lookups
403 Fixes bug 1026. Patch from Graeme Fowler
405 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
406 Code patches from Adam Ciarcinski of NetBSD.
408 NM/04 Fixed exiqgrep to cope with mailq missing size issue
411 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
412 is logged, to avoid truncation. Patch from John Horne.
414 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
415 Patch from Jakob Hirsch.
417 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
418 SQL string expansion failure details.
419 Patch from Andrey Oktyabrski.
421 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
422 Patch from Simon Arlott.
424 PP/09 New lookups functionality failed to compile on old gcc which rejects
425 extern declarations in function scope.
426 Patch from Oliver Fleischmann
428 PP/10 Use sig_atomic_t for flags set from signal handlers.
429 Check getgroups() return and improve debugging.
430 Fixed developed for diagnosis in bug 927 (which turned out to be
433 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
434 Patch from Mark Zealey.
436 PP/12 Bugzilla 1056: Improved spamd server selection.
437 Patch from Mark Zealey.
439 PP/13 Bugzilla 1086: Deal with maildir quota file races.
440 Based on patch from Heiko Schlittermann.
442 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
443 Patch from Uwe Doering, sign-off by Michael Haardt.
445 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
446 variable declaration deep within a block. Bug and patch from
449 PP/15 lookups-Makefile IRIX compatibilty coercion.
451 PP/16 Make DISABLE_DKIM build knob functional.
453 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
454 Patch by Simon Arlott
456 TF/03 Fix valgrind.h portability to C89 compilers that do not support
457 variable argument macros. Our copy now differs from upstream.
463 TF/01 Failure to get a lock on a hints database can have serious
464 consequences so log it to the panic log.
466 TF/02 Log LMTP confirmation messages in the same way as SMTP,
467 controlled using the smtp_confirmation log selector.
469 TF/03 Include the error message when we fail to unlink a spool file.
471 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
472 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
473 for maintaining out-of-tree patches for some time.
475 PP/01 Bugzilla 139: Documentation and portability issues.
476 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
477 Handle per-OS dynamic-module compilation flags.
479 PP/02 Let /dev/null have normal permissions.
480 The 4.73 fixes were a little too stringent and complained about the
481 permissions on /dev/null. Exempt it from some checks.
482 Reported by Andreas M. Kirchwitz.
484 PP/03 Report version information for many libraries, including
485 Exim version information for dynamically loaded libraries. Created
486 version.h, now support a version extension string for distributors
487 who patch heavily. Dynamic module ABI change.
489 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
490 privilege escalation vulnerability whereby the Exim run-time user
491 can cause root to append content of the attacker's choosing to
494 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
497 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
498 If dropping privileges for untrusted macros, we disabled normal logging
499 on the basis that it would fail; for the Exim run-time user, this is not
500 the case, and it resulted in successful deliveries going unlogged.
501 Fixed. Reported by Andreas Metzler.
507 PP/01 Date: & Message-Id: revert to normally being appended to a message,
508 only prepend for the Resent-* case. Fixes regression introduced in
509 Exim 4.70 by NM/22 for Bugzilla 607.
511 PP/02 Include check_rfc2047_length in configure.default because we're seeing
512 increasing numbers of administrators be bitten by this.
514 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
516 PP/03 Bugzilla 994: added openssl_options main configuration option.
518 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
520 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
522 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
524 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
525 without a peer certificate, leading to a segfault because of an
526 assumption that peers always have certificates. Be a little more
527 paranoid. Problem reported by Martin Tscholak.
529 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
530 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
531 NB: ClamAV planning to remove STREAM in "middle of 2010".
532 CL also introduces -bmalware, various -d+acl logging additions and
533 more caution in buffer sizes.
535 PP/09 Implemented reverse_ip expansion operator.
537 PP/10 Bugzilla 937: provide a "debug" ACL control.
539 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
541 PP/12 Bugzilla 973: Implement --version.
543 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
545 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
547 PP/15 Bugzilla 816: support multiple condition rules on Routers.
549 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
550 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
551 ignore trailing whitespace.
553 JJ/02 prevent non-panic DKIM error from being sent to paniclog
555 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
558 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
559 Notification from Dr Andrew Aitchison.
561 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
562 ExtendedDetectionInfo response format.
563 Notification from John Horne.
565 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
568 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
569 XSL and documented dependency on system catalogs, with examples of how
572 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
575 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
576 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
577 configuration file which is writeable by the Exim user or group.
579 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
580 of configuration files to cover files specified with the -C option if
581 they are going to be used with root privileges, not just the default
584 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
585 option (effectively making it always true).
587 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
588 files to be used while preserving root privileges.
590 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
591 that rogue child processes cannot use them.
593 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
594 run-time user, instead of root.
596 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
597 Exim run-time user without dropping privileges.
599 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
600 result string, instead of calling string_vformat() twice with the same
603 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
604 for other users. Others should always drop root privileges if they use
605 -C on the command line, even for a whitelisted configure file.
607 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
609 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
615 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
616 $data_path, and $header_path variables; fixed documentation bugs and
619 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
620 exipick to access non-standard spools, including the "frozen" queue
623 NM/01 Bugzilla 965: Support mysql stored procedures.
624 Patch from Alain Williams
626 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
628 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
629 Patch from Andreas Metzler
631 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
632 Patch from Kirill Miazine
634 NM/05 Bugzilla 671: Added umask to procmail example.
636 JJ/03 installed exipick 20100323.0, fixing doc bug
638 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
639 directory. Notification and patch from Dan Rosenberg.
641 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
643 TK/02 Improve log output when DKIM signing operation fails.
645 MH/01 Treat the transport option dkim_domain as a colon separated
646 list, not as a single string, and sign the message with each element,
647 omitting multiple occurences of the same signer.
649 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
650 Bugzilla 985, 986. Patch by Simon Arlott
652 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
653 Patch by Simon Arlott
655 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
656 MBX locking. Notification from Dan Rosenberg.
662 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
664 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
666 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
668 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
670 NM/04 Bugzilla 915: Flag broken perl installation during build.
676 TK/01 Added patch by Johannes Berg that expands the main option
677 "spamd_address" if it starts with a dollar sign.
679 TK/02 Write list of recipients to X-Envelope-Sender header when building
680 the mbox-format spool file for content scanning (suggested by Jakob
683 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
684 (http://www.dcc-servers.net/) support via dccifd. Activated by
685 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
687 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
688 by Mark Daniel Reidel <mr@df.eu>.
690 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
691 When building exim an external PCRE library is now needed -
692 PCRE is a system library on the majority of modern systems.
693 See entry on PCRE_LIBS in EDITME file.
695 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
696 conversation. Added nologin parameter to request.
697 Patch contributed by Kirill Miazine.
699 TF/01 Do not log submission mode rewrites if they do not change the address.
701 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
703 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
704 log files in place. Contributed by Roberto Lima.
706 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
708 TF/03 Bugzilla 615: When checking the local_parts router precondition
709 after a local_part_suffix or local_part_prefix option, Exim now
710 does not use the address's named list lookup cache, since this
711 contains cached lookups for the whole local part.
713 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
714 Robert Millan. Documentation is in experimental-spec.txt.
716 TF/04 Bugzilla 668: Fix parallel build (make -j).
718 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
720 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
721 Patch provided by Jan Srzednicki.
723 TF/05 Leading white space used to be stripped from $spam_report which
724 wrecked the formatting. Now it is preserved.
726 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
727 that they are available at delivery time.
729 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
731 TF/08 TLS error reporting now respects the incoming_interface and
732 incoming_port log selectors.
734 TF/09 Produce a more useful error message if an SMTP transport's hosts
735 setting expands to an empty string.
737 NM/06 Bugzilla 744: EXPN did not work under TLS.
738 Patch provided by Phil Pennock.
740 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
741 Patch provided by Richard Godbee.
743 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
744 acl_smtp_notquit, added index entry.
746 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
747 Patch provided by Eugene Bujak.
749 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
750 accept(). Patch provided by Maxim Dounin.
752 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
753 Patch provided by Phil Pennock.
755 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
757 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
758 Patch provided by Brad "anomie" Jorsch.
760 NM/14 Bugzilla 622: Added timeout setting to transport filter.
761 Patch provided by Dean Brooks.
763 TK/05 Add native DKIM support (does not depend on external libraries).
765 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
766 Patch provided by Graeme Fowler.
768 NM/16 Bugzilla 851: Documentation example syntax fix.
770 NM/17 Changed NOTICE file to remove references to embedded PCRE.
772 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
775 NM/19 Bugzilla 745: TLS version reporting.
776 Patch provided by Phil Pennock.
778 NM/20 Bugzilla 167: bool: condition support.
779 Patch provided by Phil Pennock.
781 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
782 clients. Patch provided by Phil Pennock.
784 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
785 Patch provided by Brad "anomie" Jorsch.
787 NM/23 Bugzilla 687: Fix misparses in eximstats.
788 Patch provided by Heiko Schlittermann.
790 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
791 Patch provided by Heiko Schlittermann.
793 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
794 plus update to original patch.
796 NM/26 Bugzilla 799: Documentation correction for ratelimit.
798 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
799 Patch provided by David Brownlee.
801 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
803 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
805 NM/30 Bugzilla 888: TLS documentation bugfixes.
807 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
809 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
810 Unlike the original bugzilla I have changed all shell scripts in src tree.
812 NM/33 Bugzilla 898: Transport filter timeout fix.
813 Patch by Todd Rinaldo.
815 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
816 Patch by Serge Demonchaux.
818 NM/35 Bugzilla 39: Base64 decode bug fixes.
819 Patch by Jakob Hirsch.
821 NM/36 Bugzilla 909: Correct connect() call in dcc code.
823 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
825 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
827 NM/39 Bugzilla 911: Fixed MakeLinks build script.
833 TK/01 Add preliminary DKIM support. Currently requires a forked version of
834 ALT-N's libdkim that I have put here:
835 http://duncanthrax.net/exim-experimental/
837 Note to Michael Haardt: I had to rename some vars in sieve.c. They
838 were called 'true' and it seems that C99 defines that as a reserved
839 keyword to be used with 'bool' variable types. That means you could
840 not include C99-style headers which use bools without triggering
841 build errors in sieve.c.
843 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
844 as mailq or other aliases. Changed the --help handling significantly
845 to do whats expected. exim_usage() emits usage/help information.
847 SC/01 Added the -bylocaldomain option to eximstats.
849 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
851 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
853 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
859 PH/01 Another patch from the Sieve maintainer.
861 PH/02 When an IPv6 address is converted to a string for single-key lookup
862 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
863 dots are used instead of colons so that keys in lsearch files need not
864 contain colons. This was done some time before quoting was made available
865 in lsearch files. However, iplsearch files do require colons in IPv6 keys
866 (notated using the quote facility) so as to distinguish them from IPv4
867 keys. This meant that lookups for IP addresses in host lists did not work
868 for iplsearch lookups.
870 This has been fixed by arranging for IPv6 addresses to be expressed with
871 colons if the lookup type is iplsearch. This is not incompatible, because
872 previously such lookups could never work.
874 The situation is now rather anomolous, since one *can* have colons in
875 ordinary lsearch keys. However, making the change in all cases is
876 incompatible and would probably break a number of configurations.
878 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
881 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
882 conversion specification without a maximum field width, thereby enabling
883 a rogue spamd server to cause a buffer overflow. While nobody in their
884 right mind would setup Exim to query an untrusted spamd server, an
885 attacker that gains access to a server running spamd could potentially
886 exploit this vulnerability to run arbitrary code as the Exim user.
888 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
889 $primary_hostname instead of what libspf2 thinks the hosts name is.
891 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
892 a directory entry by the name of the lookup key. Previously, if a
893 symlink pointed to a non-existing file or a file in a directory that
894 Exim lacked permissions to read, a lookup for a key matching that
895 symlink would fail. Now it is enough that a matching directory entry
896 exists, symlink or not. (Bugzilla 503.)
898 PH/03 The body_linecount and body_zerocount variables are now exported in the
901 PH/04 Added the $dnslist_matched variable.
903 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
904 This means they are set thereafter only if the connection becomes
907 PH/06 Added the client_condition to authenticators so that some can be skipped
908 by clients under certain conditions.
910 PH/07 The error message for a badly-placed control=no_multiline_responses left
911 "_responses" off the end of the name.
913 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
915 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
916 (without spaces) instead of just copying the configuration text.
918 PH/10 Added the /noupdate option to the ratelimit ACL condition.
920 PH/11 Added $max_received_linelength.
922 PH/12 Added +ignore_defer and +include_defer to host lists.
924 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
925 way in which PCRE > 7.0 is built.
927 PH/14 Implemented queue_only_load_latch.
929 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
930 MAIL command. The effect was to mangle the value on 64-bit systems.
932 PH/16 Another patch from the Sieve maintainer.
934 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
936 PH/18 If a system quota error occurred while trying to create the file for
937 a maildir delivery, the message "Mailbox is full" was not appended to the
938 bounce if the delivery eventually timed out. Change 4.67/27 below applied
939 only to a quota excession during the actual writing of the file.
941 PH/19 It seems that peer DN values may contain newlines (and other non-printing
942 characters?) which causes problems in log lines. The DN values are now
943 passed through string_printing() before being added to log lines.
945 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
946 and InterBase are left for another time.)
948 PH/21 Added message_body_newlines option.
950 PH/22 Guard against possible overflow in moan_check_errorcopy().
952 PH/23 POSIX allows open() to be a macro; guard against that.
954 PH/24 If the recipient of an error message contained an @ in the local part
955 (suitably quoted, of course), incorrect values were put in $domain and
956 $local_part during the evaluation of errors_copy.
962 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
963 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
966 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
967 issue a MAIL command.
969 PH/02 In an ACL statement such as
971 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
973 if a client was not listed at all, or was listed with a value other than
974 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
975 the condition was not true (as it should be), so access was not denied.
976 The bug was that the ! inversion was incorrectly passed on to the second
977 item. This has been fixed.
979 PH/03 Added additional dnslists conditions == and =& which are different from
980 = and & when the dns lookup returns more than one IP address.
982 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
983 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
985 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
986 FSYNC, which compiles an option called disable_fsync that allows for
987 bypassing fsync(). The documentation is heavily laced with warnings.
989 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
991 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
992 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
993 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
994 including adding "make clean"; (3) Added -fPIC when compiling the test
995 dynamically loaded module, to get rid of a warning.
997 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
998 message fails, move_frozen_messages = true and ignore_bounce_errors_after
999 = 0s. The bug is otherwise harmless.
1001 PH/07 There was a bug in the dovecot authenticator such that the value of
1002 $auth1 could be overwritten, and so not correctly preserved, after a
1003 successful authentication. This usually meant that the value preserved by
1004 the server_setid option was incorrect.
1006 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1008 PH/09 Installed PCRE release 7.0.
1010 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1011 run for batched SMTP input. It is now run at the start of every message
1012 in the batch. While fixing this I discovered that the process information
1013 (output by running exiwhat) was not always getting set for -bs and -bS
1014 input. This is fixed, and it now also says "batched" for BSMTP.
1016 PH/11 Added control=no_pipelining.
1018 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1019 patch, slightly modified), and move the expansion of helo_data till after
1020 the connection is made in the smtp transport (so it can use these
1023 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1025 PH/14 Added log_selector = +pid.
1027 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1029 PH/16 Add ${if forany and ${if forall.
1031 PH/17 Added dsn_from option to vary the From: line in DSNs.
1033 PH/18 Flush SMTP output before performing a callout, unless control =
1034 no_callout_flush is set.
1036 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1037 was true (the default) a successful delivery failed to delete the retry
1038 item, thus causing premature timeout of the address. The bug is now
1041 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1043 PH/21 Long custom messages for fakedefer and fakereject are now split up
1044 into multiline reponses in the same way that messages for "deny" and
1045 other ACL rejections are.
1047 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1048 with slight modification.
1050 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1051 draft, changing the syntax and factoring some duplicate code".
1053 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1054 for deliveries of the second and subsequent messages over the same SMTP
1057 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1058 ${reduce, with only minor "tidies".
1060 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1062 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1063 expansion side effects.
1065 PH/27 When a message times out after an over-quota error from an Exim-imposed
1066 quota, the bounce message says "mailbox is full". This message was not
1067 being given when it was a system quota that was exceeded. It now should
1070 MH/03 Made $recipients available in local_scan(). local_scan() already has
1071 better access to the recipient list through recipients_list[], but
1072 $recipients can be useful in postmaster-provided expansion strings.
1074 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1075 in the case of a MAIL command with additional options following the
1076 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1077 were accidentally chopped off.
1079 PH/29 SMTP synchronization checks are implemented when a command is read -
1080 there is a check that no more input is waiting when there shouldn't be
1081 any. However, for some commands, a delay in an ACL can mean that it is
1082 some time before the response is written. In this time, more input might
1083 arrive, invalidly. So now there are extra checks after an ACL has run for
1084 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1085 pipelining has not been advertised.
1087 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1089 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1090 returned in the SMTP response when smtp_return_error_details was false.
1091 This has been fixed.
1093 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1094 instead of the C I/O that was originally supplied, because problems were
1095 reported on Solaris.
1097 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1098 Exim which did not show up earlier: it was assuming that a call to
1099 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1100 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1101 was a macro that became an assignment, so it seemed to work. This has
1102 changed to a proper function call with a void return, hence the compile
1103 error. Exim's code has been fixed.
1105 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1108 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1110 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1112 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1113 because it turns out to be too big or there is a timeout) there is no
1114 "Completed" line in the log. When some messages of this type were
1115 selected by exigrep, they were listed as "not completed". Others were
1116 picked up by some special patterns. I have improved the selection
1117 criteria to be more general.
1119 PH/38 The host_find_failed option in the manualroute router can now be set
1120 to "ignore", to completely ignore a host whose IP address cannot be
1121 found. If all hosts are ignored, the behaviour is controlled by the new
1122 host_all_ignored option.
1124 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1125 homing or because of multiple MX records with /mx) generated more than
1126 one IP address, and the following item turned out to be the local host,
1127 all the secondary addresses of the first item were incorrectly removed
1128 from the list, along with the local host and any following hosts (which
1129 is what is supposed to happen).
1131 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1132 whoever called Exim into the -H file. In the case of the daemon it was
1133 behaving confusingly. When first started, it used values for whoever
1134 started the daemon, but after a SIGHUP it used the Exim user (because it
1135 calls itself on a restart). I have changed the code so that it now always
1138 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1139 message are rejected with the same error (e.g. no authentication or bad
1140 sender address), and a DATA command is nevertheless sent (as can happen
1141 with PIPELINING or a stupid MUA), the error message that was given to the
1142 RCPT commands is included in the rejection of the DATA command. This is
1143 intended to be helpful for MUAs that show only the final error to their
1146 PH/42 Another patch from the Sieve maintainer.
1148 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1149 Eximstats - Fixed some broken HTML links and added missing column headers
1151 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1152 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1154 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1156 PH/43 Yet another patch from the Sieve maintainer.
1158 PH/44 I found a way to check for a TCP/IP connection going away before sending
1159 the response to the final '.' that terminates a message, but only in the
1160 case where the client has not sent further data following the '.'
1161 (unfortunately, this is allowed). However, in many cases there won't be
1162 any further data because there won't be any more messages to send. A call
1163 to select() can be used: if it shows that the input is "ready", there is
1164 either input waiting, or the socket has been closed. An attempt to read
1165 the next input character can distinguish the two cases. Previously, Exim
1166 would have sent an OK response which the client would never have see.
1167 This could lead to message repetition. This fix should cure that, at
1168 least in a lot of common cases.
1170 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1171 advertised in response to EHLO.
1177 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1178 fixed by 4.65/MH/01 (is this a record?) are fixed:
1180 (i) An empty string was always treated as zero by the numeric comparison
1181 operators. This behaviour has been restored.
1183 (ii) It is documented that the numeric comparison operators always treat
1184 their arguments as decimal numbers. This was broken in that numbers
1185 starting with 0 were being interpreted as octal.
1187 While fixing these problems I realized that there was another issue that
1188 hadn't been noticed. Values of message_size_limit (both the global option
1189 and the transport option) were treated as octal if they started with 0.
1190 The documentation was vague. These values are now always treated as
1191 decimal, and I will make that clear in the documentation.
1197 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1198 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1201 MH/01 Don't check that the operands of numeric comparison operators are
1202 integers when their expansion is in "skipping" mode (fixes bug
1203 introduced by 4.64-PH/07).
1205 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1206 child addresses, Exim now panics and dies. Previously, because the count
1207 is held in a short int, deliveries were likely to be lost. As such a
1208 large number of recipients for a single message is ridiculous
1209 (performance will be very, very poor), I have chosen to impose a limit
1210 rather than extend the field.
1216 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1217 leftover -K file (the existence of which was triggered by #402).
1218 While we were at it, introduced process PID as part of the -K
1219 filename. This should rule out race conditions when creating
1222 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1223 processing considerably. Previous code took too long for large mails,
1224 triggering a timeout which in turn triggers #401.
1226 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1227 in the DK code in transports.c. sendfile() is not really portable,
1228 hence the _LINUX specificness.
1230 TF/01 In the add_headers option to the mail command in an Exim filter,
1231 there was a bug that Exim would claim a syntax error in any
1232 header after the first one which had an odd number of characters
1235 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1236 callout verification, Exim cached a "reject" for the entire domain. This
1237 is correct for most verifications, but it is not correct for a recipient
1238 verification with use_sender or use_postmaster set, because in that case
1239 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1240 case of MAIL FROM:<> rejection from other early rejections (e.g.
1241 rejection of HELO). When verifying a recipient using a non-null MAIL
1242 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1243 Whatever the result of the callout, the value of the domain cache is
1244 left unchanged (for any other kind of callout, getting as far as trying
1245 RCPT means that the domain itself is ok).
1247 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1250 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1251 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1252 session, the daemon ignores ECONNECT errors and logs others; it now
1253 ignores EPIPE as well.
1255 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1256 (quoted-printable decoding).
1258 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1259 later the small subsequent patch to fix an introduced bug.
1261 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1263 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1265 PH/08 An error is now given if message_size_limit is specified negative.
1267 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1268 to be given (somewhat) arbitrary names.
1270 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1273 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1274 miscellaneous code fixes
1276 PH/10 Added the log_reject_target ACL modifier to specify where to log
1279 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1280 hostname. This is wrong, because it relates to the incoming message (and
1281 probably the interface on which it is arriving) and not to the outgoing
1282 callout (which could be using a different interface). This has been
1283 changed to use the value of the helo_data option from the smtp transport
1284 instead - this is what is used when a message is actually being sent. If
1285 there is no remote transport (possible with a router that sets up host
1286 addresses), $smtp_active_hostname is used.
1288 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1289 tweaks were necessary in order to get it to work (see also 21 below):
1290 (a) The code assumed that strncpy() returns a negative number on buffer
1291 overflow, which isn't the case. Replaced with Exim's string_format()
1293 (b) There were several signed/unsigned issues. I just did the minimum
1294 hacking in of casts. There is scope for a larger refactoring.
1295 (c) The code used strcasecmp() which is not a standard C function.
1296 Replaced with Exim's strcmpic() function.
1297 (d) The code set only $1; it now sets $auth1 as well.
1298 (e) A simple test gave the error "authentication client didn't specify
1299 service in request". It would seem that Dovecot has changed its
1300 interface. Fortunately there's a specification; I followed it and
1301 changed what the client sends and it appears to be working now.
1303 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1306 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1307 address A is aliased to B and C, where B exists and C does not. Without
1308 -v the output is "A verified" because verification stops after a
1309 successful redirection if more than one address is generated. However,
1310 with -v the child addresses are also verified. Exim was outputting "A
1311 failed to verify" and then showing the successful verification for C,
1312 with its parentage. It now outputs "B failed to verify", showing B's
1313 parentage before showing the successful verification of C.
1315 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1316 look up a TXT record in a specific list after matching in a combined
1319 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1320 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1321 they consult the DNS. I had assumed they would set it the way they
1322 wanted; and indeed my experiments on Linux seem to show that in some
1323 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1324 To be on the safe side, however, I have now made the interface to
1325 host_find_byname() similar to host_find_bydns(), with an argument
1326 containing the DNS resolver options. The host_find_byname() function now
1327 sets these options at its start, just as host_find_bydns() does. The smtp
1328 transport options dns_qualify_single and dns_search_parents are passed to
1329 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1330 of host_find_byname() use the default settings of RES_DEFNAMES
1331 (qualify_single) but not RES_DNSRCH (search_parents).
1333 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1334 spool_read_header() do less string testing, by means of a preliminary
1335 switch on the second character of optional "-foo" lines. (This is
1336 overdue, caused by the large number of possibilities that now exist.
1337 Originally there were few.) While I was there, I also converted the
1338 str(n)cmp tests so they don't re-test the leading "-" and the first
1339 character, in the hope this might squeeze out yet more improvement.
1341 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1342 flag allowing group syntax was set by the header_syntax check but not
1343 turned off, possible causing trouble later; (2) The flag was not being
1344 set at all for the header_verify test, causing "group"-style headers to
1345 be rejected. I have now set it in this case, and also caused header_
1346 verify to ignore an empty address taken from a group. While doing this, I
1347 came across some other cases where the code for allowing group syntax
1348 while scanning a header line wasn't quite right (mostly, not resetting
1349 the flag correctly in the right place). These bugs could have caused
1350 trouble for malformed header lines. I hope it is now all correct.
1352 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1353 with the "reply" argument non-NULL. The code, however (which originally
1354 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1355 but it didn't always do it. This confused somebody who was copying the
1356 code for some other use. I have removed all the tests.
1358 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1359 feature that was used to support insecure browsers during the U.S. crypto
1360 embargo. It requires special client support, and Exim is probably the
1361 only MTA that supported it -- and would never use it because real RSA is
1362 always available. This code has been removed, because it had the bad
1363 effect of slowing Exim down by computing (never used) parameters for the
1364 RSA_EXPORT functionality.
1366 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1367 authenticator to fail if there's a tab character in the incoming data
1368 (there should never be unless someone is messing about, as it's supposed
1369 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1370 if the connection is using TLS or if the remote IP is the same as the
1371 local IP, and the "valid-client-cert option" if a client certificate has
1374 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1375 authenticators. This can be used for authorization after authentication
1376 succeeds. (In the case of plaintext, it servers for both authentication
1379 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1380 if any retry times were supplied.
1382 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1383 connection, where there is no client IP address to check. In this
1384 situation, the verify now always succeeds.
1386 PH/25 Applied John Jetmore's -Mset patch.
1388 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1390 PH/27 In a string expansion for a processed (not raw) header when multiple
1391 headers of the same name were present, leading whitespace was being
1392 removed from all of them, but trailing whitespace was being removed only
1393 from the last one. Now trailing whitespace is removed from each header
1394 before concatenation. Completely empty headers in a concatenation (as
1395 before) are ignored.
1397 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1398 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1400 PH/29 [Removed. This was a change that I later backed out, and forgot to
1401 correct the ChangeLog entry (that I had efficiently created) before
1402 committing the later change.]
1404 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1405 address errors (4xx response to RCPT) over the same connection as other
1406 messages routed to the same hosts. Such deliveries are always "forced",
1407 so retry times are not inspected. This resulted in far too many retries
1408 for the affected addresses. The effect occurred only when there were more
1409 hosts than the hosts_max_try setting in the smtp transport when it had
1410 the 4xx errors. Those hosts that it had tried were not added to the list
1411 of hosts for which the message was waiting, so if all were tried, there
1412 was no problem. Two fixes have been applied:
1414 (i) If there are any address or message errors in an SMTP delivery, none
1415 of the hosts (tried or untried) are now added to the list of hosts
1416 for which the message is waiting, so the message should not be a
1417 candidate for sending over the same connection that was used for a
1418 successful delivery of some other message. This seems entirely
1419 reasonable: after all the message is NOT "waiting for some host".
1420 This is so "obvious" that I'm not sure why it wasn't done
1421 previously. Hope I haven't missed anything, but it can't do any
1422 harm, as the worst effect is to miss an optimization.
1424 (ii) If, despite (i), such a delivery is accidentally attempted, the
1425 routing retry time is respected, so at least it doesn't keep
1426 hammering the server.
1428 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1429 in ${readsocket because some servers need this prod.
1431 PH/32 Added some extra debug output when updating a wait-xxx database.
1433 PH/33 The hint "could be header name not terminated by colon", which has been
1434 given for certain expansion errors for a long time, was not being given
1435 for the ${if def:h_colon_omitted{... case.
1437 PH/34 The spec says: "With one important exception, whenever a domain list is
1438 being scanned, $domain contains the subject domain." There was at least
1439 one case where this was not true.
1441 PH/35 The error "getsockname() failed: connection reset by peer" was being
1442 written to the panic log as well as the main log, but it isn't really
1443 panic-worthy as it just means the connection died rather early on. I have
1444 removed the panic log writing for the ECONNRESET error when getsockname()
1447 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1448 runs only) independently of the message's sender address. This meant
1449 that, if the 4xx error was in fact related to the sender, a different
1450 message to the same recipient with a different sender could confuse
1451 things. In particualar, this can happen when sending to a greylisting
1452 server, but other circumstances could also provoke similar problems.
1453 I have changed the default so that the retry time for these errors is now
1454 based a combination of the sender and recipient addresses. This change
1455 can be overridden by setting address_retry_include_sender=false in the
1458 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1459 remote server are returned as part of bounce messages. This was not
1460 happening for LMTP over a pipe (the lmtp transport), but now it is the
1461 same for both kinds of LMTP.
1463 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1464 in header lines that were in fact CNAMEs. This is no longer the case.
1466 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1467 and queue runs started by the daemon processed all messages. This has
1468 been fixed so that -R and -S can now usefully be given with -q<time>.
1470 PH/40 Import PCRE release 6.7 (fixes some bugs).
1472 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1474 PH/42 Give an error if -q is specified more than once.
1476 PH/43 Renamed the variables $interface_address and $interface_port as
1477 $received_ip_address and $received_port, to make it clear that these
1478 values apply to message reception, and not to the outgoing interface when
1479 a message is delivered. (The old names remain recognized, of course.)
1481 PH/44 There was no timeout on the connect() call when using a Unix domain
1482 socket in the ${readsocket expansion. There now is.
1484 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1485 be meaningful with "accept".
1487 SC/01 Eximstats V1.43
1488 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1490 SC/02 Eximstats V1.44
1491 Use a glob alias rather than an array ref in the generated
1492 parser. This improves both readability and performance.
1494 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1495 Collect SpamAssassin and rejection statistics.
1496 Don't display local sender or destination tables unless
1497 there is data to show.
1498 Added average volumes into the top table text output.
1500 SC/04 Eximstats V1.46
1501 Collect data on the number of addresses (recipients)
1502 as well as the number of messages.
1504 SC/05 Eximstats V1.47
1505 Added 'Message too big' to the list of mail rejection
1506 reasons (thanks to Marco Gaiarin).
1508 SC/06 Eximstats V1.48
1509 Mainlog lines which have GMT offsets and are too short to
1510 have a flag are now skipped.
1512 SC/07 Eximstats V1.49 (Alain Williams)
1513 Added the -emptyok flag.
1515 SC/08 Eximstats V1.50
1516 Fixes for obtaining the IP address from reject messages.
1518 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1519 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1520 whitesspace changes from 4.64-PH/27
1522 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1525 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1526 are found, allow negative numbers in numeric criteria)
1528 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1530 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1531 to match changes made in 4.64-PH/43
1533 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1535 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1536 "domain" is actually an IP address, and force a failure. This locks out
1537 those revolvers/nameservers that support "A-for-A" lookups, in
1538 contravention of the specifications.
1540 PH/48 When a host name was looked up from an IP address, and the subsequent
1541 forward lookup of the name timed out, the host name was left in
1542 $sender_host_name, contrary to the specification.
1544 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1545 restricted to single-key lookups, Exim was not diagnosing an error if
1546 * or *@ was used with a query-style lookup.
1548 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1550 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1551 long ago, but noone interested enough thought of it. Let's just say that
1552 the "1.1" means that there are some new functions that weren't there at
1553 some point in the past.
1555 PH/51 Error processing for expansion failure of helo_data from an smtp
1556 transport during callout processing was broken.
1558 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1559 tested/used via the -bh/-bhc/-bs options.
1561 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1562 bug, fixed in subsequent PCRE releases).
1564 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1565 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1567 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1573 SC/01 Use a glob alias rather than an array ref in eximstats generated
1574 parser. This improves both readability and performance.
1576 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1577 Don't display local sender or destination tables in eximstats unless
1578 there is data to show.
1579 Added average volumes into the eximstats top table text output.
1581 SC/03 Collect data on the number of addresses (recipients) as well
1582 as the number of messages in eximstats.
1584 TF/01 Correct an error in the documentation for the redirect router. Exim
1585 does (usually) call initgroups() when daemonizing.
1587 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1588 with consistent privilege compared to when running as a daemon.
1590 TF/03 Note in the spec that $authenticated_id is not set for local
1591 submissions from trusted users.
1593 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1594 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1596 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1597 by adding some example configuration directives to the default
1598 configuration file. A little bit of work is required to uncomment the
1599 directives and define how usernames and passwords are checked, but
1600 there is now a framework to start from.
1602 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1603 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1604 without this. I don't know how relevant this is to other LDAP libraries.
1606 PH/02 Add the verb name to the "unknown ACL verb" error.
1608 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1610 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1612 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1613 directory not expanded when it should be if an expanded home directory
1614 was set for the address (which is overridden by the transport).
1616 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1619 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1620 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1621 because it is too late at that time, and has no effect.
1623 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1624 security issue with \' (bugzilla #107). I could not use the
1625 PQescapeStringConn() function, because it needs a PGconn value as one of
1628 PH/08 When testing addresses using -bt, indicate those final addresses that
1629 are duplicates that would not cause an additional delivery. At least one
1630 person was confused, thinking that -bt output corresponded to deliveries.
1631 (Suppressing duplicates isn't a good idea as you lose the information
1632 about possibly different redirections that led to the duplicates.)
1634 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1635 systems where poll() doesn't work, in particular OS X.
1637 PH/10 Added more information to debugging output for retry time not reached.
1639 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1640 operations in malware.c.
1642 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1645 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1646 syslog_duplication set false, log lines that would normally be written
1647 both the the main log and to the reject log were not written to syslog at
1650 PH/14 In the default configuration, change the use of "message" in ACL warn
1651 statements to "add_header".
1653 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1654 not followed by a command (e.g. "seen endif").
1656 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1657 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1660 PH/17 Added extra conditions to the default value of delay_warning_condition
1664 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1665 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1666 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1669 The Auto-Submitted: and various List- headers are standardised, whereas I
1670 don't think Precedence: ever was.
1672 PH/18 Refactored debugging code in route_finduser() to show more information,
1673 in particular, the error code if getpwnam() issues one.
1675 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1676 This is apparently needed in addition to the PH/07 change above to avoid
1677 any possible encoding problems.
1679 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1680 but not after initializing Perl.
1682 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1683 output them only if debugging. By default they are written stderr,
1684 apparently, which is not desirable.
1686 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1689 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1692 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1694 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1695 authenticated or an ident call has been made. Suppress the default
1696 values for $authenticated_id and $authenticated_sender (but permit -oMai
1697 and -oMas) when testing with -bh.
1699 PH/24 Re-jigged the order of the tests in the default configuration so that the
1700 tests for valid domains and recipients precede the DNS black list and CSA
1701 tests, on the grounds that those ones are more expensive.
1703 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1704 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1705 This bug exists in every version of Exim that I still have, right back to
1708 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1709 However, an attempt to turn on case-sensitivity in a regex key by
1710 including (?-i) didn't work because the subject string was already
1711 lowercased, and the effects were non-intuitive. It turns out that a
1712 one-line patch can be used to allow (?-i) to work as expected.
1718 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1719 other effects) broke the use of negated acl sub-conditions.
1721 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1724 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1725 "Deny" causes Exim to reject the incoming connection with a 554 error.
1726 Unfortunately, if there is a major crisis, such as a disk failure,
1727 tcp-wrappers gives "deny", whereas what one would like would be some
1728 kind of temporary error. A kludge has been added to help with this.
1729 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1730 554 error is used if errno is still zero or contains ENOENT (which occurs
1731 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1734 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1736 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1737 errors. Otherwise a message that provokes a temporary error (when other
1738 messages do not) can cause a whole host to time out.
1740 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1741 addresses were routed directly to files or pipes from a redirect router.
1742 File deliveries just didn't batch; pipe deliveries might have suffered
1745 PH/06 A failure to get a lock for a hints database would erroneously always say
1746 "Failed to get write lock", even when it was really a read lock.
1748 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1749 of 0600. This has been changed to use the value of the lockfile_mode
1750 option (which defaults to 0600).
1752 PH/08 Applied small patch from the Sieve maintainer.
1754 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1755 folder from quota calculations, a direct delivery into this folder messed
1756 up the contents of the maildirsize file. This was because the regex was
1757 used only to exclude .Trash (or whatever) when the size of the mailbox
1758 was calculated. There was no check that a delivery was happening into an
1759 excluded directory. This bug has been fixed by ignoring all quota
1760 processing for deliveries into excluded directories.
1762 PH/10 Added the maildirfolder_create_regex option to appendfile.
1768 PH/01 The code for finding all the local interface addresses on a FreeBSD
1769 system running IPv6 was broken. This may well have applied to all BSD
1770 systems, as well as to others that have similar system calls. The broken
1771 code found IPv4 interfaces correctly, but gave incorrect values for the
1772 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1773 that it would not match correctly against @[] and not recognize the IPv6
1776 PH/02 The ipliteral router was not recognizing addresses of the form user@
1777 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1779 PH/03 Added disable_ipv6.
1781 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1782 decoded form, because it is most often used to construct To: headers
1783 lines in autoreplies, and the decoded form may well be syntactically
1784 invalid. However, $reply_address has leading white space removed, and all
1785 newlines turned into spaces so that the autoreply transport does not
1788 PH/05 If group was specified without a user on a router, and no group or user
1789 was specified on a transport, the group from the router was ignored.
1791 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1792 for visible compile-time settings that can be used to change these
1793 numbers, for those that want even more. Backwards compatibility with old
1794 spool files has been maintained. However, going back to a previous Exim
1795 release will lost any variables that are in spool files.
1797 PH/07 Two small changes when running in the test harness: increase delay when
1798 passing a TCP/IP connection to a new process, in case the original
1799 process has to generate a bounce, and remove special handling of
1800 127.0.0.2 (sic), which is no longer necessary.
1802 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1803 be the same on different OS.
1805 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1808 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1809 whether --show-vars was specified or not
1811 JJ/02 exipick: Added support for new ACL variable spool format introduced
1814 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1815 syntactically invalid From: or Reply-to: line, and a filter used this to
1816 generate an autoreply, and therefore failed to obtain an address for the
1817 autoreply, Exim could try to deliver to a non-existent relative file
1818 name, causing unrelated and misleading errors. What now happens is that
1819 it logs this as a hard delivery error, but does not attempt to create a
1822 PH/11 The exinext utility has a -C option for testing purposes, but although
1823 the given file was scanned by exinext itself; it wasn't being passed on
1824 when Exim was called.
1826 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1827 an end-of-file indication when reading a command response.
1829 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1830 compiled. In many other places in Exim, IPv6 addresses are always
1831 recognized, so I have changed this. It also means that IPv4 domain
1832 literals of the form [IPV4:n.n.n.n] are now always recognized.
1834 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1835 used if the router is not running as root, for example, when verifying at
1836 ACL time, or when using -bh. The debugging output from this situation was
1837 non-existent - all you got was a failure to exec. I have made two
1840 (a) Failures to set uid/gid, the current directory, or a process leader
1841 in a subprocess such as that created by queryprogram now generate
1842 suitable debugging ouput when -d is set.
1844 (b) The queryprogram router detects when it is not running as root,
1845 outputs suitable debugging information if -d is set, and then runs
1846 the subprocess without attempting to change uid/gid.
1848 PH/15 Minor change to Makefile for building test_host (undocumented testing
1851 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1852 additional section of a DNS packet that returns MX or SRV records.
1853 Instead, it always explicitly searches for A/AAAA records. This avoids
1854 major problems that occur when a DNS server includes only records of one
1855 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1856 fixed another bug: if SRV records were looked up and the corresponding
1857 address records were *not* found in the additional section, the port
1858 values from the SRV records were lost.
1860 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1861 using the correct key (the original address) when searching the retry
1862 rules in order to find which one to use for generating the retry hint.
1864 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1865 adding the default one. Similarly, if it contains a Reply-To: header, the
1866 errors_reply_to option, if set, is not used.
1868 PH/19 When calculating a retry time, Exim used to measure the "time since
1869 failure" by looking at the "first failed" field in the retry record. Now
1870 it does not use this if it is later than than the arrival time of the
1871 message. Instead it uses the arrival time. This makes for better
1872 behaviour in cases where some deliveries succeed, thus re-setting the
1873 "first failed" field. An example is a quota failure for a huge message
1874 when small messages continue to be delivered. Without this change, the
1875 "time since failure" will always be short, possible causing more frequent
1876 delivery attempts for the huge message than are intended.
1877 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1879 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1880 $1, $2, $3) because the numerical variables can be reset during some
1881 expansion items (e.g. "match"), thereby losing the authentication data.
1883 PH/21 Make -bV show the size of off_t variables so that the test suite can
1884 decide whether to run tests for quotas > 2G.
1886 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1887 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1888 filecount value is greater than 2G or if a quota value is greater than 2G
1889 on a system where the size of off_t is not greater than 4, a panic error
1892 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1893 never match. The debug and -bh output now contains an explicit error
1894 message indicating a malformed IPv4 address or mask.
1896 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1897 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1898 PH/23 above applies.
1900 PH/25 Do not write to syslog when running in the test harness. The only
1901 occasion when this arises is a failure to open the main or panic logs
1902 (for which there is an explicit test).
1904 PH/26 Added the /no_tell option to "control=freeze".
1906 PH/27 If a host name lookup failed very early in a connection, for example, if
1907 the IP address matched host_lookup and the reverse lookup yielded a name
1908 that did not have a forward lookup, an error message of the form "no IP
1909 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1910 could be logged. Now it outputs the IP address instead of "NULL".
1912 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1913 allows the sender and the authenticated sender to be set when
1914 submitting a message from within Exim. Since child_open_exim() is
1915 documented for local_scan(), the new function should be too.
1917 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1918 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1919 results in an empty string is now treated as unset.
1921 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1923 PH/31 Added sender_verify_fail logging option.
1925 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1926 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1927 tidied the source and removed it altogether.
1929 PH/33 When a queue run was abandoned because the load average was too high, a
1930 log line was always written; now it is written only if the queue_run log
1931 selector is set. In addition, the log line for abandonment now contains
1932 information about the queue run such as the pid. This is always present
1933 in "start" and "stop" lines but was omitted from the "abandon" line.
1935 PH/34 Omit spaces between a header name and the colon in the error message that
1936 is given when verify = headers_syntax fails (if there are lots of them,
1937 the message gets confusing).
1939 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1940 names, as there are now some PTR records that contain slashes. This check
1941 is only to protect against broken name servers that fall over on strange
1942 characters, so the fact that it applies to all lookups doesn't matter.
1944 PH/36 Now that the new test suite is complete, we can remove some of the
1945 special code in Exim that was needed for the old test suite. For example,
1946 sorting DNS records because real resolvers return them in an arbitrary
1947 order. The new test suite's fake resolver always returns records in the
1950 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1951 bounces) except when queue_only is set, to avoid logging races between
1952 the different processes.
1954 PH/38 Panic-die if .include specifies a non-absolute path.
1956 PH/39 A tweak to the "H" retry rule from its user.
1958 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1959 a label. They prevented compilation on older perls.
1961 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1962 a warning to be raised on newish perls.
1964 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1965 on queue. Changes to match documented behaviour of showing count of
1966 messages matching specified criteria.
1968 PH/40 Changed the default ident timeout from 30s to 5s.
1970 PH/41 Added support for the use of login_cap features, on those BSD systems
1971 that have them, for controlling the resources used by pipe deliveries.
1973 PH/42 The content-scanning code uses fopen() to create files in which to put
1974 message data. Previously it was not paying any attention to the mode of
1975 the files. Exim runs with umask(0) because the rest of the code creates
1976 files with open(), and sets the required mode explicitly. Thus, these
1977 files were ending up world-writeable. This was not a big issue, because,
1978 being within the spool directory, they were not world-accessible. I have
1979 created a function called modefopen, which takes an additional mode
1980 argument. It sets umask(777), creates the file, chmods it to the required
1981 mode, then resets the umask. All the relevant calls to fopen() in the
1982 content scanning code have been changed to use this function.
1984 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1985 to 24 hours. This avoids potential overflow problems when processing G
1986 and H retry rules. I suspect nobody ever tinkers with this value.
1988 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1990 PH/45 When the plaintext authenticator is running as a client, the server's
1991 challenges are checked to ensure they are valid base64 strings. By
1992 default, the authentication attempt is cancelled if an invalid string is
1993 received. Setting client_ignore_invalid_base64 true ignores these errors.
1994 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1995 they are received. Thus, the responses can be made to depend on the
1996 challenges. If an invalid string is ignored, an empty string is placed in
1999 PH/46 Messages that are created by the autoreply transport now contains a
2000 References: header, in accordance with RFCs 2822 and 3834.
2002 PH/47 Added authenticated_sender_force to the smtp transport.
2004 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2006 PH/49 Installed latest patch from the Sieve maintainer.
2008 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2009 was also set, the appendfile transport was unnecessarily scanning a
2010 directory of message files (e.g. for maildir delivery) to find the count
2011 of files (along with the size), even though it did not need this
2012 information. It now does the scan only if it needs to find either the
2013 size of the count of files.
2015 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2017 PH/52 Two bugs concerned with error handling when the smtp transport is
2020 (i) Exim was not creating retry information for temporary errors given
2021 for individual recipients after the DATA command when the smtp transport
2022 was used in LMTP mode. This meant that they could be retried too
2023 frequently, and not timed out correctly.
2025 (ii) Exim was setting the flag that allows error details to be returned
2026 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2027 recipients that were returned after the DATA command.
2029 PH/53 This is related to PH/52, but is more general: for any failing address,
2030 when detailed error information was permitted to be returned to the
2031 sender, but the error was temporary, then after the final timeout, only
2032 "retry timeout exceeded" was returned. Now it returns the full error as
2033 well as "retry timeout exceeded".
2035 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2036 do this, and (what is worse) MTAs that accept it.
2038 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2039 will now be deprecated.
2041 PH/56 New os.c-cygwin from the Cygwin maintainer.
2043 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2044 formats (previously only available in exim formats via -bpr, -bpru,
2045 and -bpra. Now also available in native and exiqgrep formats)
2047 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2048 with very large, slow to parse queues
2050 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2052 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2054 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2055 responses to authentication challenges, though it was showing the
2056 challenges; (ii) I've removed the CR characters from the debug output for
2059 PH/58 Allow for the insertion of a newline as well as a space when a string
2060 is turned into more than one encoded-word during RFC 2047 encoding. The
2061 Sieve code now uses this.
2063 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2064 data_4xx, lost_connection, tls_required.
2066 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2067 message was being sent as an SMTP response.
2069 PH/61 Add -l and -k options to exicyclog.
2071 PH/62 When verifying, if an address was redirected to one new address, so that
2072 verification continued, and the new address failed or deferred after
2073 having set something in $address_data, the value of $address_data was not
2074 passed back to the ACL. This was different to the case when no
2075 redirection occurred. The value is now passed back in both cases.
2077 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2078 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2079 use login_cap.h, so on its own it isn't the distinguishing feature. The
2080 new name refers directly to the setclassresources() function.
2082 PH/65 Added configuration files for NetBSD3.
2084 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2086 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2087 is preferred over IPv4.
2089 PH/68 The bounce_return_message and bounce_return_body options were not being
2090 honoured for bounces generated during the reception of non-SMTP messages.
2091 In particular, this applied to messages rejected by the ACL. This bug has
2092 been fixed. However, if bounce_return_message is true and bounce_return_
2093 body is false, the headers that are returned for a non-SMTP message
2094 include only those that have been read before the error was detected.
2095 (In the case of an ACL rejection, they have all been read.)
2097 PH/69 The HTML version of the specification is now built in a directory called
2098 spec_html instead of spec.html, because the latter looks like a path with
2099 a MIME-type, and this confuses some software.
2101 PH/70 Catch two compiler warnings in sieve.c.
2103 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2104 function verify_get_ident() calls ip_connect() to connect a socket, but
2105 if the "connect()" function timed out, ip_connect() used to close the
2106 socket. However, verify_get_ident() also closes the socket later, and in
2107 between Exim writes to the log, which may get opened at this point. When
2108 the socket was closed in ip_connect(), the log could get the same file
2109 descriptor number as the socket. This naturally causes chaos. The fix is
2110 not to close the socket in ip_connect(); the socket should be closed by
2111 the function that creates it. There was only one place in the code where
2112 this was missing, in the iplookup router, which I don't think anybody now
2113 uses, but I've fixed it anyway.
2115 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2116 well as to direct DNS lookups. Otherwise the handling of names in host
2117 lists is inconsistent and therefore confusing.
2123 PH/01 Two changes to the default runtime configuration:
2125 (1) Move the checks for relay_from_hosts and authenticated clients from
2126 after to before the (commented out) DNS black list checks.
2128 (2) Add control=submission to the relay_from_hosts and authenticated
2129 clients checks, on the grounds that messages accepted by these
2130 statements are most likely to be submissions.
2132 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2134 (1) Generate an error if the third argument for the ${prvs expansion is
2137 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2140 (3) Reset the variables that are obtained from the first argument of
2141 ${prvscheck and used in the second argument before leaving the code,
2142 because their memory is reclaimed, so using them afterwards may do
2145 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2146 one (it's much easier than Tom thought :-).
2148 (5) Because of (4), we can now allow for the use of $prvscheck_result
2149 inside the third argument.
2151 PH/03 For some reason, the default setting of PATH when running a command from
2152 a pipe transport was just "/usr/bin". I have changed it to
2155 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2156 anything to be listed in the output from -bV.
2158 PH/05 When a filter generated an autoreply, the entire To: header line was
2159 quoted in the delivery log line, like this:
2161 => >A.N.Other <ano@some.domain> <original@ddress> ...
2163 This has been changed so that it extracts the operative address. There
2164 may be more than one such address. If so, they are comma-separated, like
2167 => >ano@some.domain,ona@other.domain <original@ddress> ...
2169 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2170 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2171 not being looked up in the rDNS to get a host name, Exim was showing the
2172 IP address twice in Received: lines, even though the IP addresses were
2173 identical. For example:
2175 Received: from [1.2.3.4] (helo=[1.2.3.4])
2177 However, if the real host name was known, it was omitting the HELO data
2178 if it matched the actual IP address. This has been tidied up so that it
2179 doesn't show the same IP address twice.
2181 PH/07 When both +timestamp and +memory debugging was on, the value given by
2182 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2183 called by the debug printing, thereby overwriting the timestamp buffer.
2184 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2186 PH/08 When the original message was included in an autoreply transport, it
2187 always said "this is a copy of the message, including all the headers",
2188 even if body_only or headers_only was set. It now gives an appropriate
2191 PH/09 Applied a patch from the Sieve maintainer which:
2193 o fixes some comments
2194 o adds the (disabled) notify extension core
2195 o adds some debug output for the result of if/elsif tests
2196 o points to the current vacation draft in the documentation
2197 and documents the missing references header update
2201 o fixes a bug in processing the envelope test (when testing
2202 multiple envelope elements, the last element determinted the
2205 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2206 Electronic Mail") by including:
2208 Auto-submitted: auto-generated
2210 in the messages that it generates (bounce messages and others, such as
2211 warnings). In the case of bounce messages for non-SMTP mesages, there was
2212 also a typo: it was using "Auto_submitted" (underscore instead of
2213 hyphen). Since every message generated by Exim is necessarily in response
2214 to another message, thes have all been changed to:
2216 Auto-Submitted: auto-replied
2218 in accordance with these statements in the RFC:
2220 The auto-replied keyword:
2222 - SHOULD be used on messages sent in direct response to another
2223 message by an automatic process,
2225 - MUST NOT be used on manually-generated messages,
2227 - MAY be used on Delivery Status Notifications (DSNs) and Message
2228 Disposition Notifications (MDNs),
2230 - MUST NOT be used on messages generated by automatic or periodic
2231 processes, except for messages which are automatic responses to
2234 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2235 to the default Received: header definition.
2237 PH/12 Added log selector acl_warn_skipped (default on).
2239 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2240 variables because (a) they are in the wrong storage pool and (b) even if
2241 they were copied, it wouldn't work properly because of the caching.
2243 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2244 checking when decoding. Apparently there are clients that generate
2245 overlong encoded strings. Why am I not surprised?
2247 PH/15 If the first argument of "${if match_address" was not empty, but did not
2248 contain an "@" character, Exim crashed. Now it writes a panic log message
2249 and treats the condition as false.
2251 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2253 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2254 extension "envelope-auth". The code is finished and in agreement with
2255 other implementations, but there is no documentation so far and in fact,
2256 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2257 not changing the active code.
2259 Print executed "if" and "elsif" statements when debugging is used. This
2260 helps a great deal to understand what a filter does.
2262 Document more things not specified clearly in RFC3028. I had all this
2263 sorted out, when out of a sudden new issues came to my mind. Oops."
2265 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2268 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2269 canonical form (as documented). However, after a host name lookup from
2270 the IP address, check_host() was doing a simple string comparison with
2271 addresses acquired from the DNS when checking that the found name did
2272 have the original IP as one of its addresses. Since any found IPv6
2273 addresses are likely to be in abbreviated form, the comparison could
2274 fail. Luckily, there already exists a function for doing the comparison
2275 by converting both addresses to binary, so now that is used instead of
2276 the text comparison.
2278 PH/20 There was another similar case to PH/19, when a complete host name was
2279 given in a host list; looking up its IP address could give an abbreviated
2280 form, whereas the current host's name might or might not be abbreviated.
2281 The same fix has been applied.
2287 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2288 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2291 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2292 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2294 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2296 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2297 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2298 Also, for "Auto-Submitted", treat anything other than "no" as
2299 non-personal, in accordance with RFC 3834. (Previously it treated
2300 anything starting "auto-" as non-personal.)
2302 TF/01 The control=submission/name=... option had a problem with syntax
2303 errors if the name included a slash character. The /name= option
2304 now slurps the rest of the string, so it can include any characters
2305 but it must come last in the list of options (after /sender_retain
2308 PH/05 Some modifications to the interface to the fake nameserver for the new
2316 TK/01 Added the "success_on_redirect" address verification option. See
2317 NewStuff for rationale and an example.
2319 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2321 PH/02 Patch to exigrep to allow it to work on syslog lines.
2323 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2324 fread() to skip over the body file's header line, because in Cygwin the
2325 header line is locked and is inaccessible.
2327 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2328 co-exist for some time) to make it clear that it is the Exim ID that is
2329 referenced, not the Message-ID: header line.
2331 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2332 string_format() function, because snprintf() does not exist on all
2335 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2336 ${stat: expansion item.
2338 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2339 protocol synchronization error", to keep the pedants happy.
2341 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2342 well as for IRIX systems, when gcc is being used. See the host.c source
2345 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2347 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2350 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2351 transport and to the smtp transport in LMTP mode.
2353 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2355 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2356 run a filter in a subprocess. This could lead to confusion in subsequent
2357 lookups in the parent process. There should also be a search_tidyup() at
2358 the end of the subprocess.
2360 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2361 only if the host matched helo_try_verify_hosts, which caused the
2362 verification to occur when the EHLO/HELO command was issued. The ACL just
2363 tested the remembered result. Now, if a previous verification attempt has
2364 not happened, "verify = helo" does it there and then.
2366 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2368 TK/03 Fix log output including CR from clamd.
2370 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2371 exist provoked a memory error which could cause a segfault.
2373 PH/15 Installed PCRE 6.2
2375 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2377 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2378 of the problem. Specifically, suggested +O2 rather than +O1 for the
2381 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2383 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2384 record, the port was not correctly logged when the outgoing_port log
2385 selector was set (it logged the transort's default port).
2387 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2388 fallback_hosts, and "hosts" in the smtp transport.
2390 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2391 host errors such as "Connection refused".
2393 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2394 authentication with radiusclient 0.4.9:
2396 - Error returned from rc_read_config was caught wrongly
2397 - Username/password not passed on to radius server due to wrong length.
2399 The presumption is that some radiusclient API changes for 4.51/PH/17
2400 were not taken care of correctly. The code is still untested by me (my
2401 Linux distribution still has 0.3.2 of radiusclient), but it was
2402 contributed by a Radius user.
2404 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2405 expanding the "port" option of the smtp transport.
2407 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2408 while reading a MIME header. Thanks to Tom Hughes for a patch.
2410 PH/24 Include config.h inside local_scan.h so that configuration settings are
2413 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2414 that in an ACL for RCPT (for example), you can examine exactly what was
2417 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2418 commands, but it was not correctly comparing the address with the actual
2419 client host address. Thus, it would show the EHLO address in Received:
2420 header lines when this was not necessary.
2422 PH/27 Added the % operator to ${eval:}.
2424 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2425 it should be ignoring failures (because with -C, for example, it has lost
2426 privilege). It wasn't ignoring creation failures other than "already
2429 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2432 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2433 because an input line was too long, either on its own, or by virtue of
2434 too many continuations, the temporary file was not being removed, and the
2435 return code was incorrect.
2437 PH/31 Missing "BOOL" in function definition in filtertest.c.
2439 PH/32 Applied Sieve patches from the maintainer.
2441 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2443 PH/33 Added "verify = not_blind".
2445 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2446 Local/Makefile (with some defaults set). These are used in built scripts
2447 such as exicyclog, but they have never been used in the exim_install
2448 script (though there are many overriding facilities there). I have
2449 arranged that the exim_install script now takes note of these two
2452 PH/35 Installed configuration files for Dragonfly.
2454 PH/36 When a locally submitted message by a trusted user did not contain a
2455 From: header, and the sender address was obtained from -f or from an SMTP
2456 MAIL command, and the trusted user did not use -F to supply a sender
2457 name, $originator_name was incorrectly used when constructing a From:
2458 header. Furthermore, $originator_name was used for submission mode
2459 messages from external hosts without From: headers in a similar way,
2460 which is clearly wrong.
2462 PH/37 Added control=suppress_local_fixups.
2464 PH/38 When log_selector = +received_sender was set, and the addition of the
2465 sender made the log line's construction buffer exactly full, or one byte
2466 less than full, an overflow happened when the terminating "\n" was
2469 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2470 when the result of a list match is failure because a DNS lookup failed.
2472 PH/40 RM_COMMAND is now used in the building process.
2474 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2475 the "build-* directories that it finds.
2477 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2478 address in a domain literal was a prefix of an interface address.
2480 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2481 when verifying a sender address, unless rewrite_headers is false.
2483 PH/44 Wrote a long comment about why errors_to addresses are verified as
2484 recipients, not senders.
2486 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2487 the ratelimit ACL was added.
2489 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2491 PH/46 Added extra information about PostgreSQL errors to the error string.
2493 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2494 avoiding the need to install special zones in a real server. This is
2495 backwards compatible; if it can't find the fake resolver, it drops back.
2496 Thus, both old and new test suites can be run.
2498 TF/02 Added util/ratelimit.pl
2500 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2501 clock is set back in time.
2503 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2504 Candler <B.Candler@pobox.com>.
2506 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2507 OK for addresses that are the result of redirections.
2509 PH/48 A number of further additions for the benefit of the new test suite,
2510 including a fake gethostbyname() that interfaces to the fake DNS resolver
2513 TF/06 The fix for widen_domains has also been applied to qualify_single and
2514 search_parents which are the other dnslookup options that can cause
2517 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2520 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2522 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2523 service" if it encountered an MX record with an empty target hostname.
2524 The message is now "an MX or SRV record indicated no SMTP service".
2526 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2527 if the DNS of the sending site is misconfigured. This is quite a
2528 common situation. This change restores the behaviour of treating a
2529 helo verification defer as a failure.
2531 PH/51 If self=fail was set on a router, the bounce message did not include the
2532 actual error message.
2538 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2540 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2541 command itself ended in error, the underlying message about the transport
2542 filter timeout was being overwritten with the pipe command error. Now the
2543 underlying error message should be appended to the second error message.
2545 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2547 PH/02 Reduce the amount of output that "make" produces by default. Full output
2548 can still be requested.
2550 PH/03 The warning log line about a condition test deferring for a "warn" verb
2551 was being output only once per connection, rather than after each
2552 occurrence (because it was using the same function as for successful
2553 "warn" verbs). This seems wrong, so I have changed it.
2555 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2556 it should not have, which might have caused a crash in the right
2557 circumstances, but probably never did.
2559 PH/04 Installed a modified version of Tony Finch's patch to make submission
2560 mode fix the return path as well as the Sender: header line, and to
2561 add a /name= option so that you can make the user's friendly name appear
2564 TF/03 Added the control = fakedefer ACL modifier.
2566 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2567 Mark Lowes for thorough testing.
2569 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2571 TK/03 Merged latest SRS patch from Miles Wilton.
2573 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2574 with the definition in sysexits.h (which is #included earlier).
2575 Fortunately, Exim does not actually use EX_OK. The code used to try to
2576 preserve the sysexits.h value, by assumimg that macro definitions were
2577 scanned for macro replacements. I have been disabused of this notion,
2578 so now the code just undefines EX_OK before #including unistd.h.
2580 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2581 in the smtp transport. When a block could not be written in a single
2582 write() function, the timeout was being re-applied to each part-write.
2583 This seems wrong - if the receiver was accepting one byte at a time it
2584 would take for ever. The timeout is now adjusted when this happens. It
2585 doesn't have to be particularly precise.
2587 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2588 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2590 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2591 without a domain if the check to <postmaster@domain> fails.
2593 SC/01 Eximstats: added -xls and the ability to specify output files
2594 (patch written by Frank Heydlauf).
2596 SC/02 Eximstats: use FileHandles for outputing results.
2598 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2600 SC/04 Eximstats: fixed display of large numbers with -nvr option
2602 SC/05 Eximstats: fixed merging of reports with empty tables.
2604 SC/06 Eximstats: added the -include_original_destination flag
2606 SC/07 Eximstats: removed tabs and trailing whitespace.
2608 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2610 TK/06 MBOX spool code: Add real "From " MBOX separator line
2611 so the .eml file is really in mbox format (even though
2612 most programs do not really care). Patch from Alex Miller.
2614 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2615 The latter is generated from $received_to and is only set if the
2616 message has one envelope recipient. SA can use these headers,
2617 obviously out-of-the-box. Patch from Alex Miller.
2619 PH/08 The ${def test on a variable was returning false if the variable's
2620 value was "0", contrary to what the specification has always said!
2621 The result should be true unless the variable is empty.
2623 PH/09 The syntax error of a character other than { following "${if
2624 def:variable_name" (after optional whitespace) was not being diagnosed.
2625 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2626 accidental colon was present, for example, could give incorrect results.
2628 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2629 result is used (not including appendfile, where other changes are about
2632 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2633 This involved changing a lot of size variables from int to off_t. It
2634 should work with maildirs and everything.
2636 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2637 spamd dying while we are connected to it.
2639 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2642 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2643 function for BDB 4.3.
2645 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2647 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2648 the sources for PCRE have been re-arranged and more files are now
2651 PH/15 The code I had for printing potentially long long variables in PH/11
2652 above was not the best (it lost precision). The length of off_t variables
2653 is now inspected at build time, and an appropriate printing format (%ld
2654 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2655 to be "long long int" or "long int". This is needed for the internal
2656 formatting function string_vformat().
2658 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2659 the configuration file to be ":syslog", then the script "guesses" where
2660 the logs files are, rather than using the compiled in default. In our
2661 case the guess is not the same as the compiled default, so the script
2662 suddenly stopped working when I started to use syslog. The patch checks
2663 to see if log_file_path is "". If so, it attempts to read it from exim
2664 with no configuration file to get the compiled in version, before it
2665 falls back to the previous guessing code."
2667 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2668 implementing BATV in an Exim configuration. See NewStuff for the gory
2671 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2672 Makefile that are specific to HP-UX.
2674 PH/18 If the "use_postmaster" option was set for a recipient callout together
2675 with the "random" option, the postmaster address was used as the MAIL
2676 FROM address for the random test, but not for the subsequent recipient
2677 test. It is now used for both.
2679 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2680 patch removes a few documentation additions to RFC 3028, because the
2681 latest draft now contains them. It adds the new en;ascii-case comparator
2682 and a new error check for 8bit text in MIME parts. Comparator and
2683 require names are now matched exactly. I enabled the subaddress
2684 extension, but it is not well tested yet (read: it works for me)."
2686 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2687 rework some of the code of TK/09 above to avoid the hardwired use of
2688 "%lld" and "long long". Replaced the call to snprintf() with a call to
2691 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2692 records point to non-existent hosts", "retry timeout exceeded", and
2693 "retry time not reached for any host after a long failure period".
2695 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2696 experimental DomainKeys support:
2698 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2699 (2) On an error such as an illegally used "control", the wrong name for
2700 the control was given.
2702 These problems did NOT occur unless DomainKeys support was compiled.
2704 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2706 PH/24 Added ${if match_ip condition.
2708 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2709 databases so that it will be absolutely obvious if a crash occurs in the
2710 DB library. This is a regular occurrence (often caused by mis-matched
2713 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2714 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2715 picked up on a user's system that detects such things. There doesn't seem
2716 to be a gcc warning option for this - only an attribute that has to be
2717 put on the function's prototype. It seems that in Fedora Core 4 they have
2718 set this on a number of new functions. No doubt there will be more in due
2721 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2722 specify a transport. However, if an address that was verified by such a
2723 router was the subject of a callout, Exim crashed because it tried to
2724 read the rcpt_include_affixes from the non-existent transport. Now it
2725 just assumes that the setting of that option is false. This bug was
2726 introduced by 4.51/PH/31.
2728 PH/28 Changed -d+all to exclude +memory, because that information is very
2729 rarely of interest, but it makes the output a lot bigger. People tend to
2730 do -d+all out of habit.
2732 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2733 code in os-type was giving problems when libc.so lives in lib64, like on
2736 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2737 aren't the modern standard, and it seems that some systems' include files
2738 don't always have them. Exim was already checking for some of the newer
2739 ones like T_AAAA, and defining it itself. I've added checks for all the
2740 record types that Exim uses.
2742 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2743 not automatically generating a new one, as it is supposed to. This
2744 prevented TLS from working. If the file did exist, but contained invalid
2745 data, a new version was generated, as expected. It was only the case of a
2746 non-existent file that was broken.
2748 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2749 with a change in libdomainkeys > 0.64.
2751 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2752 from DNS. If the selector record carries the flag, it now has
2753 precedence over the domain-wide flag.
2755 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2757 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2758 the use of a port name that isn't defined in /etc/services) occurred, the
2759 message was deferred as in a normal delivery, and thus remained on the
2760 spool, instead of being failed because of the mua_wrapper setting. This
2761 is now fixed, and I tidied up some of the mua_wrapper messages at the
2764 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2765 the messages in a hash of arrays rather than using individual hashes.
2766 This is a bit cleaner and results in dramatic memory savings, albeit
2767 at a slight CPU cost.
2769 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2770 as requested by Marc Sherman.
2772 SC/10 Eximstats: added histograms for user specified patterns as requested
2775 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2777 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2778 fopen() in the content-scanning modules that did not already have it.
2784 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2785 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2787 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2789 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2791 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2792 to test Sieve filters that use "vacation".
2794 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2795 that changes the way the GnuTLS parameters are stored in the cache file.
2796 The new format can be generated externally. For backward compatibility,
2797 if the data in the cache doesn't make sense, Exim assumes it has read an
2798 old-format file, and it generates new data and writes a new file. This
2799 means that you can't go back to an older release without removing the
2802 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2803 work if there are any delivery delays because "one_time" forces the
2804 parent to be marked "delivered", so its unseen clone is never tried
2805 again. For this reason, Exim now forbids the simultaneous setting of
2808 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2809 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2810 entry if you want to know the details. The fix, however, neglected to
2811 consider the case when local delivery batching is involved. The test for
2812 "previously delivered" was not happening when checking to see if an
2813 address could be batched with a previous (undelivered) one; under
2814 certain circumstances this could lead to multiple deliveries to the same
2817 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2818 in its include files, and this causes problems building Exim.
2820 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2821 header_syntax) but Exim was just ignoring anything given after a slash.
2822 In particular, this caused confusion with an attempt to use "verify =
2823 reverse_host_lookup/defer_ok". An error is now given when options are
2824 supplied for verify items that do not have them. (Maybe reverse_host_
2825 lookup should have a defer_ok option, but that's a different point.)
2827 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2828 defined by RFC 821) to 2048, because there were problems with some AUTH
2829 commands, and RFC 1869 says the size should be increased for extended
2830 SMTP commands that take arguments.
2832 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2835 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2836 "unknown" error; now it says that the functionality isn't in the binary.
2838 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2839 an address' error message when a string expansion fails (syntax or
2840 whatever). Otherwise the password may appear in the log. Following change
2841 PH/42 below, there is no longer a chance of it appearing in a bounce
2844 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2846 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2847 of its addresses was ever tried. (Bugzilla bug #2.)
2849 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2850 the result incorrectly in the debug output. (It correctly added a newline
2851 to what was transported.)
2853 TF/01 Added $received_time.
2855 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2856 commented out examples of how to interface to a virus scanner and to
2857 SpamAssassin. Also added commented examples of av_scanner and
2858 spamd_address settings.
2860 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2861 and controls are allowed in which ACLs. There were a couple of minor
2862 errors. Some of the entries in the conditions table (which is a table of
2863 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2864 negation of where the condition IS allowed.
2866 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2868 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2869 header file does not have a version number, so I've had to invent a new
2870 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2871 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2872 radiusclient), but it was contributed by a Radius user.
2874 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2875 files or directories, for OpenSSL.
2877 PH/19 When an Exim process that is running as root has to create an Exim log
2878 file, it does so in a subprocess that runs as exim:exim so as to get the
2879 ownership right at creation (otherwise, other Exim processes might see
2880 the file with the wrong ownership). There was no test for failure of this
2881 fork() call, which would lead to the process getting stuck as it waited
2882 for a non-existent subprocess. Forks do occasionally fail when resources
2883 run out. I reviewed all the other calls to fork(); they all seem to check
2886 PH/20 When checking for unexpected SMTP input at connect time (before writing
2887 the banner), Exim was not dealing correctly with a non-positive return
2888 from the read() function. If the client had disconnected by this time,
2889 the result was a log entry for a synchronization error with an empty
2890 string after "input=" when read() returned zero. If read() returned -1
2891 (an event I could not check), uninitialized data bytes were printed.
2892 There were reports of junk text (parts of files, etc) appearing after
2895 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2897 PH/22 Added support for macro redefinition, and (re)definition in between
2898 driver and ACL definitions.
2900 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2901 forgetting to use the resulting value; it was using the unexpanded value.
2903 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2904 hadn't been configured. The fix is from Juergen Kreileder, who
2905 understands it better than I do:
2907 "Here's what I see happening with three configured cyrus_sasl
2908 authenticators configured (plain, login, cram-md5):
2910 On startup auth_cyrus_sasl_init() gets called for each of these.
2911 This means three calls to sasl_listmech() without a specified mech_list.
2912 => SASL tests which mechs of all available mechs actually work
2913 => three warnings about OTP not working
2914 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2916 With the patch, sasl_listmech() also gets called three times. But now
2917 SASL's mech_list option is set to the server_mech specified in the the
2918 authenticator. Or in other words, the answer from sasl_listmech()
2919 gets limited to just the mech you're testing for (which is different
2921 => the return list contains just 'plain' or 'login', 'cram-md5' or
2922 nothing depending on the value of ob->server_mech.
2924 I've just tested the patch: Authentication still works fine,
2925 unavailable mechs specified in the exim configuration are still
2926 caught, and the auth.log warnings about OTP are gone."
2928 PH/25 When debugging is enabled, the contents of the command line are added
2929 to the debugging output, even when log_selector=+arguments is not
2932 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2933 answer is "GNU", and only if the return is "GNU/something" is the answer
2936 PH/27 $acl_verify_message is now set immediately after the failure of a
2937 verification in an ACL, and so is available in subsequent modifiers. In
2938 particular, the message can be preserved by coding like this:
2940 warn !verify = sender
2941 set acl_m0 = $acl_verify_message
2943 Previously, $acl_verify_message was set only while expanding "message"
2944 and "log_message" when a very denied access.
2946 PH/28 Modified OS/os.c-Linux with
2948 -#ifndef OS_LOAD_AVERAGE
2949 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2951 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2952 nomenclature these days.)
2954 PH/29 Installed patch from the Sieve maintainer that adds the options
2955 sieve_useraddress and sieve_subaddress to the redirect router.
2957 PH/30 In these circumstances:
2958 . Two addresses routed to the same list of hosts;
2959 . First host does not offer TLS;
2960 . First host accepts first address;
2961 . First host gives temporary error to second address;
2962 . Second host offers TLS and a TLS session is established;
2963 . Second host accepts second address.
2964 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2965 and peerdn, if requested) that were in fact used only for the second
2968 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2969 attention to any local part prefix or suffix that was matched by the
2970 router that accepted the address. It now behaves in the same way as it
2971 does for delivery: the affixes are removed from the local part unless
2972 rcpt_include_affixes is set on the transport.
2974 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2975 timeout during the DATA phase of an incoming message.
2977 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2978 applied a patch sanctioned by the Sieve maintainer.
2980 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2981 the uid or gid is negative. A case of a negative gid caused this to be
2982 noticed. The fix allows for either to be negative.
2984 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2985 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2988 PH/36 The change PH/12 above was broken. Fixed it.
2990 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2991 the grounds that routing the same address twice would always produce the
2992 same answer. This might have been true once, but it is certainly no
2993 longer true now. Routing a child address may depend on the previous
2994 routing that produced that child. Some complicated redirection strategies
2995 went wrong when messages had multiple recipients, and made Exim's
2996 behaviour dependent on the order in which the addresses were given.
2998 I have moved the duplicate checking until after the routing is complete.
2999 Exim scans the addresses that are assigned to local and remote
3000 transports, and removes any duplicates. This means that more work will be
3001 done, as duplicates will always all be routed, but duplicates are
3002 presumably rare, so I don't expect this is of any significance.
3004 For deliveries to pipes, files, and autoreplies, the duplicate checking
3005 still happens during the routing process, since they are not going to be
3008 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3009 It corrects a timeout issue with spamd. This is Ian's comment: "The
3010 background is that sometimes spamd either never reads data from a
3011 connection it has accepted, or it never writes response data. The exiscan
3012 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3013 blindly assumes that writes won't block so it may never time out."
3015 PH/39 Allow G after quota size as well as K and M.
3017 PH/40 The value set for $authenticated_id in an authenticator may not contain
3018 binary zeroes or newlines because the value is written to log lines and
3019 to spool files. There was no check on this. Now the value is run through
3020 the string_printing() function so that such characters are converted to
3021 printable escape sequences.
3023 PH/41 $message_linecount is a new variable that contains the total number of
3024 lines in the message. Compare $body_linecount, which is the count for the
3027 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3028 bounce and delay warning messages, except in certain special cases, which
3031 (a) An SMTP error message from a remote host;
3032 (b) A message specified in a :fail: redirection;
3033 (c) A message specified in a "fail" command in a system filter;
3034 (d) A message specified in a FAIL return from the queryprogram router;
3035 (e) A message specified by the cannot_route_message router option.
3037 In these cases only, Exim does include the error details in bounce and
3038 warning messages. There are also a few cases where bland messages such
3039 as "unrouteable address" or "local delivery error" are given.
3041 PH/43 $value is now also set for the "else" part of a ${run expansion.
3043 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3044 being worked on, but at least Exim now implements the latest version to
3047 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3048 process to complete was treated as a delivery failure, a timeout while
3049 writing the message to the pipe was logged, but erroneously treated as a
3050 successful delivery. Such timeouts include transport filter timeouts. For
3051 consistency with the overall process timeout, these timeouts are now
3052 treated as errors, giving rise to delivery failures by default. However,
3053 there is now a new Boolean option for the pipe transport called
3054 timeout_defer, which, if set TRUE, converts the failures into defers for
3055 both kinds of timeout. A transport filter timeout is now identified in
3058 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3059 systems where "make" and "gmake" are different, calling "gmake" at top
3060 level broke things. I've arranged for the value of $(MAKE) to be passed
3061 from the Makefile to this script so that it can call the same version of
3065 A note about Exim versions 4.44 and 4.50
3066 ----------------------------------------
3068 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3069 changes of various kinds. As a consequence, a big documentation update was
3070 needed. This delayed the release for rather longer than seemed good, especially
3071 in the light of a couple of (minor) security issues. Therefore, the changes
3072 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3073 release. So 4.44 and 4.50 are in effect two different branches that both start
3076 I have left the 4.50 change log unchanged; it contains all the changes since
3077 4.43. The change log for 4.44 is below; many of its items are identical to
3078 those for 4.50. This seems to be the most sensible way to preserve the
3079 historical information.
3085 1. Minor wording change to the doc/README.SIEVE file.
3087 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3088 computation of the current number of files was incorrect.
3090 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3091 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3094 4. Give more explanation in the error message when the command for a transport
3095 filter fails to execute.
3097 5. There are several places where Exim runs a non-Exim command in a
3098 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3099 was being done only for the command run by the queryprogram router. It is
3100 now done for all such subprocesses. The other cases are: ${run, transport
3101 filters, and the commands run by the lmtp and pipe transports.
3103 6. Added CONFIGURE_GROUP build-time option.
3105 7. Some older OS have a limit of 256 on the maximum number of file
3106 descriptors. Exim was using setrlimit() to set 1000 as a large value
3107 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3108 systems. I've change it so that if it can't get 1000, it tries for 256.
3110 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3111 was an oversight, and furthermore, ever since the addition of extra
3112 controls (e.g. 4.43/32), the checks on when to allow different forms of
3113 "control" were broken. There should now be diagnostics for all cases when a
3114 control that does not make sense is encountered.
3116 9. Added the /retain_sender option to "control=submission".
3118 10. $recipients is now available in the predata ACL (oversight).
3120 11. Tidy the search cache before the fork to do a delivery from a message
3121 received from the command line. Otherwise the child will trigger a lookup
3122 failure and thereby defer the delivery if it tries to use (for example) a
3123 cached ldap connection that the parent has called unbind on.
3125 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3126 of $address_data from the recipient verification was clobbered by the
3127 sender verification.
3129 13. The value of address_data from a sender verification is now available in
3130 $sender_address_data in subsequent conditions in the ACL statement.
3132 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3134 15. Added a new option "connect=<time>" to callout options, to set a different
3137 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3138 was its contents. (It was OK if the option was not defined at all.)
3140 17. A "Completed" log line is now written for messages that are removed from
3141 the spool by the -Mrm option.
3143 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3144 information about exactly what failed.
3146 19. Added -dd to debug only the daemon process.
3148 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3149 handles timeouts, both on the server side and network timeouts. Renamed the
3150 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3152 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3153 It is now set to "smtps".
3155 22. $host_address is now set to the target address during the checking of
3156 ignore_target_hosts.
3158 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3159 being passed; this would have caused $sender_host_name to have been used if
3160 matching the list had actually called for a host name (not very likely,
3161 since this list is usually IP addresses). A host name is now passed as
3164 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3165 code that specifies a non-restarting handler (typically sigaction() in
3166 modern systems) in an attempt to fix a rare and obscure crash bug.
3168 25. Narrowed the window for a race in the daemon that could cause it to ignore
3169 SIGCHLD signals. This is not a major problem, because they are used only to
3170 wake it up if nothing else does.
3172 26. A malformed maildirsize file could cause Exim to calculate negative values
3173 for the mailbox size or file count. Odd effects could occur as a result.
3174 The maildirsize information is now recalculated if the size or filecount
3177 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3178 support for a long time. Removed HAVE_SYS_VFS_H.
3180 28. Installed the latest version of exipick from John Jetmore.
3182 29. In an address list, if the pattern was not a regular expression, an empty
3183 subject address (from a bounce message) matched only if the pattern was an
3184 empty string. Non-empty patterns were not even tested. This was the wrong
3185 because it is perfectly reasonable to use an empty address as part of a
3186 database query. An empty address is now tested by patterns that are
3187 lookups. However, all the other forms of pattern expect the subject to
3188 contain a local part and a domain, and therefore, for them, an empty
3189 address still always fails if the pattern is not itself empty.
3191 30. Exim went into a mad DNS loop when attempting to do a callout where the
3192 host was specified on an smtp transport, and looking it up yielded more
3193 than one IP address.
3195 31. Re-factored the code for checking spool and log partition space into a
3196 function that finds that data and another that does the check. The former
3197 is then used to implement four new variables: $spool_space, $log_space,
3198 $spool_inodes, and $log_inodes.
3200 32. The RFC2047 encoding function was originally intended for short strings
3201 such as real names; it was not keeping to the 75-character limit for
3202 encoded words that the RFC imposes. It now respects the limit, and
3203 generates multiple encoded words if necessary. To be on the safe side, I
3204 have increased the buffer size for the ${rfc2047: expansion operator from
3207 33. It is now permitted to omit both strings after an "if" condition; if the
3208 condition is true, the result is "true". As before, when the second string
3209 is omitted, a false condition yields an empty string. This makes it less
3210 cumbersome to write custom ACL and router conditions.
3212 34. Failure to deliver a bounce message always caused it to be frozen, even if
3213 there was an errors_to setting on the router. The errors_to setting is now
3216 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3217 canonical form (fully expanded) before being placed in
3218 $sender_host_address.
3220 36. The table in the code that translates DNS record types into text (T_A to
3221 "A" for instance) was missing entries for NS and CNAME. It is just possible
3222 that this could have caused confusion if both these types were looked up
3223 for the same domain, because the text type is used as part of Exim's
3224 per-process caching. But the chance of anyone hitting this buglet seems
3227 37. The dnsdb lookup has been extended in a number of ways.
3229 (1) There is a new type, "zns", which walks up the domain tree until it
3230 finds some nameserver records. It should be used with care.
3232 (2) There is a new type, "mxh", which is like "mx" except that it returns
3233 just the host names, not the priorities.
3235 (3) It is now possible to give a list of domains (or IP addresses) to be
3236 looked up. The behaviour when one of the lookups defers can be
3237 controlled by a keyword.
3239 (4) It is now possible to specify the separator character for use when
3240 multiple records are returned.
3242 38. The dnslists ACL condition has been extended: it is now possible to supply
3243 a list of IP addresses and/or domains to be looked up in a particular DNS
3246 39. Added log_selector=+queue_time_overall.
3248 40. When running the queue in the test harness, wait just a tad after forking a
3249 delivery process, to get repeatability of debugging output.
3251 41. Include certificate and key file names in error message when GnuTLS fails
3252 to set them up, because the GnuTLS error message doesn't include the name
3253 of the failing file when there is a problem reading it.
3255 42. Allow both -bf and -bF in the same test run.
3257 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3259 44. The "Exiscan patch" is now merged into the mainline Exim source.
3261 45. Sometimes the final signoff response after QUIT could fail to get
3262 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3263 < 0 before doing a fflush(). This bug looks as though it goes back to the
3264 introduction of TLS in release 3.20, but "sometimes" must have been rare
3265 because the tests only now provoked it.
3267 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3268 (this can affect the format of dates).
3270 47. exim_tidydb, when checking for the continued existence of a message for
3271 which it has found a message-specific retry record, was not finding
3272 messages that were in split spool directories. Consequently, it was
3273 deleting retry records that should have stayed in existence.
3275 48. Steve fixed some bugs in eximstats.
3277 49. The SPA authentication driver was not abandoning authentication and moving
3278 on to the next authenticator when an expansion was forced to fail,
3279 contradicting the general specification for all authenticators. Instead it
3280 was generating a temporary error. It now behaves as specified.
3282 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3283 (the order specifies the preference for clients). The order is now AES256,
3284 AES128, 3DES, ARCFOUR128.
3286 51. Small patch to Sieve code - explicitly set From: when generating an
3289 52. Exim crashed if a remote delivery caused a very long error message to be
3290 recorded - for instance if somebody sent an entire SpamAssassin report back
3291 as a large number of 550 error lines. This bug was coincidentally fixed by
3292 increasing the size of one of Exim's internal buffers (big_buffer) that
3293 happened as part of the Exiscan merge. However, to be on the safe side, I
3294 have made the code more robust (and fixed the comments that describe what
3297 53. Now that there can be additional text after "Completed" in log lines (if
3298 the queue_time_overall log selector is set), a one-byte patch to exigrep
3299 was needed to allow it to recognize "Completed" as not the last thing in
3302 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3303 patch that reportedly fixes this has been added. I am not expert enough to
3304 create a test for it. This is what the patch creator wrote:
3306 "I found a little strange behaviour of ldap code when working with
3307 Windows 2003 AD Domain, where users was placed in more than one
3308 Organization Units. When I tried to give exim partial DN, the exit code
3309 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3310 But simultaneously result of request was absolutely normal ldap result,
3311 so I produce this patch..."
3313 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3314 REFERENCE, so I have modified the code to exclude the patch when that macro
3317 55. Some experimental protocols are using DNS PTR records for new purposes. The
3318 keys for these records are domain names, not reversed IP addresses. The
3319 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3320 leaves it alone. Component reversal etc. now happens only for IP addresses.
3323 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3325 57. Double the size of the debug message buffer (to 2048) so that more of very
3326 long debug lines gets shown.
3328 58. The exicyclog utility now does better if the number of log files to keep
3329 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3331 59. Two changes related to the smtp_active_hostname option:
3333 (1) $smtp_active_hostname is now available as a variable.
3334 (2) The default for smtp_banner uses $smtp_active_hostname instead
3335 of $primary_hostname.
3337 60. The host_aton() function is supposed to be passed a string that is known
3338 to be a valid IP address. However, in the case of IPv6 addresses, it was
3339 not checking this. This is a hostage to fortune. Exim now panics and dies
3340 if the condition is not met. A case was found where this could be provoked
3341 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3342 components; fortuitously, this particular loophole had already been fixed
3343 by change 4.50/55 above.
3345 If there are any other similar loopholes, the new check in host_aton()
3346 itself should stop them being exploited. The report I received stated that
3347 data on the command line could provoke the exploit when Exim was running as
3348 exim, but did not say which command line option was involved. All I could
3349 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3350 running as the user.
3353 61. There was a buffer overflow vulnerability in the SPA authentication code
3354 (which came originally from the Samba project). I have added a test to the
3355 spa_base64_to_bits() function which I hope fixes it.
3358 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3359 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3361 63. The daemon start-up calls getloadavg() while still root for those OS that
3362 need the first call to be done as root, but it missed one case: when
3363 deliver_queue_load_max is set with deliver_drop_privilege. This is
3364 necessary for the benefit of the queue runner, because there is no re-exec
3365 when deliver_drop_privilege is set.
3367 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3368 This has been fixed.
3370 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3371 was in use, was not putting the data itself into the right store pool;
3372 consequently, it could be overwritten for a subsequent message in the same
3373 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3376 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3378 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3379 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3380 the function were treating the return as a boolean value, which happened to
3381 work because 0=false and not-0=true, but is not correct code.
3383 68. The host_aton() function was not handling scoped IPv6 addresses (those
3384 with, for example, "%eth0" on the end) correctly.
3386 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3387 negated items (that is, ~something) in unsigned ints. Some compilers
3388 apparently mutter when there is no cast.
3390 70. If an address verification called from an ACL failed, and did not produce a
3391 user-specific message (i.e. there was only a "system" message), nothing was
3392 put in $acl_verify_message. In this situation, it now puts the system
3395 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3396 session; change 4.31/43 added the unwanted input to the log line - except
3397 that it did not do this in the start of session case. It now does.
3399 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3400 This is wrong and can cause the other end to generate a synchronization
3401 error if it is another Exim or anything else that does the synchronization
3402 check. A QUIT command is no longer sent after a timeout.
3404 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3405 during host lookups.
3407 74. The defer_ok option of callout verification was not working if it was used
3408 when verifying addresses in header lines, that is, for this case:
3410 verify = header_sender/callout=defer_ok
3412 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3413 those file descriptors could be used for SMTP connections. If anything
3414 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3415 could be sent to the SMTP client, causing chaos. The daemon now opens
3416 stdin, stdout, and stderr to /dev/null when it puts itself into the
3419 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3420 log by default. The user can override this with suitable Perl magic.
3422 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3423 the log message when discard triggers, was not working for the DATA ACL or
3424 for the non-SMTP ACL.
3426 78. Error message wording change in sieve.c.
3428 79. If smtp_accept_max_per_host was set, the number of connections could be
3429 restricted to fewer than expected, because the daemon was trying to set up
3430 a new connection before checking whether the processes handling previous
3431 connections had finished. The check for completed processes is now done
3432 earlier. On busy systems, this bug wouldn't be noticed because something
3433 else would have woken the daemon, and it would have reaped the completed
3436 80. If a message was submitted locally by a user whose login name contained one
3437 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3438 It caused a spool format error. I have fixed the spool reading code. A
3439 related problem was that the "from" clause in the Received: line became
3440 illegal because of the space(s). It is now covered by ${quote_local_part.
3442 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3445 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3447 83. Patch from Sieve maintainer to fix unterminated string problem in
3448 "vacation" handling.
3450 84. Some minor changes to the Linux configuration files to help with other
3451 OS variants using glibc.
3453 85. One more patch for Sieve to update vacation handling to latest spec.
3456 ----------------------------------------------------
3457 See the note above about the 4.44 and 4.50 releases.
3458 ----------------------------------------------------
3464 1. Change 4.43/35 introduced a bug that caused file counts to be
3465 incorrectly computed when quota_filecount was set in an appendfile
3468 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3469 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3472 3. Give more explanation in the error message when the command for a transport
3473 filter fails to execute.
3475 4. There are several places where Exim runs a non-Exim command in a
3476 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3477 was being done only for the command run by the queryprogram router. It is
3478 now done for all such subprocesses. The other cases are: ${run, transport
3479 filters, and the commands run by the lmtp and pipe transports.
3481 5. Some older OS have a limit of 256 on the maximum number of file
3482 descriptors. Exim was using setrlimit() to set 1000 as a large value
3483 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3484 systems. I've change it so that if it can't get 1000, it tries for 256.
3486 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3487 was an oversight, and furthermore, ever since the addition of extra
3488 controls (e.g. 4.43/32), the checks on when to allow different forms of
3489 "control" were broken. There should now be diagnostics for all cases when a
3490 control that does not make sense is encountered.
3492 7. $recipients is now available in the predata ACL (oversight).
3494 8. Tidy the search cache before the fork to do a delivery from a message
3495 received from the command line. Otherwise the child will trigger a lookup
3496 failure and thereby defer the delivery if it tries to use (for example) a
3497 cached ldap connection that the parent has called unbind on.
3499 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3500 of $address_data from the recipient verification was clobbered by the
3501 sender verification.
3503 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3504 was its contents. (It was OK if the option was not defined at all.)
3506 11. A "Completed" log line is now written for messages that are removed from
3507 the spool by the -Mrm option.
3509 12. $host_address is now set to the target address during the checking of
3510 ignore_target_hosts.
3512 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3513 being passed; this would have caused $sender_host_name to have been used if
3514 matching the list had actually called for a host name (not very likely,
3515 since this list is usually IP addresses). A host name is now passed as
3518 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3519 code that specifies a non-restarting handler (typically sigaction() in
3520 modern systems) in an attempt to fix a rare and obscure crash bug.
3522 15. Narrowed the window for a race in the daemon that could cause it to ignore
3523 SIGCHLD signals. This is not a major problem, because they are used only to
3524 wake it up if nothing else does.
3526 16. A malformed maildirsize file could cause Exim to calculate negative values
3527 for the mailbox size or file count. Odd effects could occur as a result.
3528 The maildirsize information is now recalculated if the size or filecount
3531 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3532 support for a long time. Removed HAVE_SYS_VFS_H.
3534 18. Updated exipick to current release from John Jetmore.
3536 19. Allow an empty sender to be matched against a lookup in an address list.
3537 Previously the only cases considered were a regular expression, or an
3540 20. Exim went into a mad DNS lookup loop when doing a callout where the
3541 host was specified on the transport, if the DNS lookup yielded more than
3544 21. The RFC2047 encoding function was originally intended for short strings
3545 such as real names; it was not keeping to the 75-character limit for
3546 encoded words that the RFC imposes. It now respects the limit, and
3547 generates multiple encoded words if necessary. To be on the safe side, I
3548 have increased the buffer size for the ${rfc2047: expansion operator from
3551 22. Failure to deliver a bounce message always caused it to be frozen, even if
3552 there was an errors_to setting on the router. The errors_to setting is now
3555 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3556 canonical form (fully expanded) before being placed in
3557 $sender_host_address.
3559 24. Updated eximstats to version 1.33
3561 25. Include certificate and key file names in error message when GnuTLS fails
3562 to set them up, because the GnuTLS error message doesn't include the name
3563 of the failing file when there is a problem reading it.
3565 26. Expand error message when OpenSSL has problems setting up cert/key files.
3568 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3569 (this can affect the format of dates).
3571 28. exim_tidydb, when checking for the continued existence of a message for
3572 which it has found a message-specific retry record, was not finding
3573 messages that were in split spool directories. Consequently, it was
3574 deleting retry records that should have stayed in existence.
3576 29. eximstats updated to version 1.35
3577 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3578 1.35 - bugfix such that pie charts by volume are generated correctly
3580 30. The SPA authentication driver was not abandoning authentication and moving
3581 on to the next authenticator when an expansion was forced to fail,
3582 contradicting the general specification for all authenticators. Instead it
3583 was generating a temporary error. It now behaves as specified.
3585 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3586 (the order specifies the preference for clients). The order is now AES256,
3587 AES128, 3DES, ARCFOUR128.
3589 31. Small patch to Sieve code - explicitly set From: when generating an
3592 32. Exim crashed if a remote delivery caused a very long error message to be
3593 recorded - for instance if somebody sent an entire SpamAssassin report back
3594 as a large number of 550 error lines. This bug was coincidentally fixed by
3595 increasing the size of one of Exim's internal buffers (big_buffer) that
3596 happened as part of the Exiscan merge. However, to be on the safe side, I
3597 have made the code more robust (and fixed the comments that describe what
3600 33. Some experimental protocols are using DNS PTR records for new purposes. The
3601 keys for these records are domain names, not reversed IP addresses. The
3602 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3603 leaves it alone. Component reversal etc. now happens only for IP addresses.
3606 34. The host_aton() function is supposed to be passed a string that is known
3607 to be a valid IP address. However, in the case of IPv6 addresses, it was
3608 not checking this. This is a hostage to fortune. Exim now panics and dies
3609 if the condition is not met. A case was found where this could be provoked
3610 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3611 components; fortuitously, this particular loophole had already been fixed
3612 by change 4.50/55 or 4.44/33 above.
3614 If there are any other similar loopholes, the new check in host_aton()
3615 itself should stop them being exploited. The report I received stated that
3616 data on the command line could provoke the exploit when Exim was running as
3617 exim, but did not say which command line option was involved. All I could
3618 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3619 running as the user.
3622 35. There was a buffer overflow vulnerability in the SPA authentication code
3623 (which came originally from the Samba project). I have added a test to the
3624 spa_base64_to_bits() function which I hope fixes it.
3627 36. The daemon start-up calls getloadavg() while still root for those OS that
3628 need the first call to be done as root, but it missed one case: when
3629 deliver_queue_load_max is set with deliver_drop_privilege. This is
3630 necessary for the benefit of the queue runner, because there is no re-exec
3631 when deliver_drop_privilege is set.
3633 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3634 was in use, was not putting the data itself into the right store pool;
3635 consequently, it could be overwritten for a subsequent message in the same
3636 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3639 38. Sometimes the final signoff response after QUIT could fail to get
3640 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3641 < 0 before doing a fflush(). This bug looks as though it goes back to the
3642 introduction of TLS in release 3.20, but "sometimes" must have been rare
3643 because the tests only now provoked it.
3649 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3650 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3651 Now it returns an integer. A number of calls were still expecting a T/F
3652 return. Fortuitously, in all cases, the tests worked in OK situations,
3653 which is the norm. However, things would have gone wrong on any write
3654 failures on the smtp file descriptor. This function is used when sending
3655 messages over SMTP and also when doing verify callouts.
3657 2. When Exim is called to do synchronous delivery of a locally submitted
3658 message (the -odf or -odi options), it no longer closes stderr before doing
3661 3. Implemented the mua_wrapper option.
3663 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3665 5. Implemented the functions header_remove(), header_testname(),
3666 header_add_at_position(), and receive_remove_recipient(), and exported them
3669 6. If an ACL "warn" statement specified the addition of headers, Exim already
3670 inserted X-ACL-Warn: at the start if there was no header name. However, it
3671 was not making this test for the second and subsequent header lines if
3672 there were newlines in the string. This meant that an invalid header could
3673 be inserted if Exim was badly configured.
3675 7. Allow an ACL "warn" statement to add header lines at the start or after all
3676 the Received: headers, as well as at the end.
3678 8. Added the rcpt_4xx retry error code.
3680 9. Added postmaster_mailfrom=xxx to callout verification option.
3682 10. Added mailfrom=xxxx to the callout verification option, for verify=
3685 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3686 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3688 12. Inserted some casts to stop certain compilers warning when using pointer
3689 differences as field lengths or precisions in printf-type calls (mostly
3690 affecting debugging statements).
3692 13. Added optional readline() support for -be (dynamically loaded).
3694 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3695 same clock tick as a message's arrival, so that its received time was the
3696 same as the "first fail" time on the retry record, and that message
3697 remained on the queue past the ultimate address timeout, every queue runner
3698 would try a delivery (because it was past the ultimate address timeout) but
3699 after another failure, the ultimate address timeout, which should have then
3700 bounced the address, did not kick in. This was a "< instead of <=" error;
3701 in most cases the first failure would have been in the next clock tick
3702 after the received time, and all would be well.
3704 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3705 being recognized when the domain list was tested by the match_domain
3706 condition in an expansion string.
3708 16. Added the ${str2b64: operator.
3710 17. Exim was always calling setrlimit() to set a large limit for the number of
3711 processes, without checking whether the existing limit was already
3712 adequate. (It did check for the limit on file descriptors.) Furthermore,
3713 errors from getrlimit() and setrlimit() were being ignored. Now they are
3714 logged to the main and panic logs, but Exim does carry on, to try to do its
3715 job under whatever limits there are.
3717 18. Imported PCRE 5.0.
3719 19. Trivial typo in log message " temporarily refused connection" (the leading
3722 20. If the log selector return_path_on_delivery was set and an address was
3723 redirected to /dev/null, the delivery process crashed because it assumed
3724 that a return path would always be set for a "successful" delivery. In this
3725 case, the whole delivery is bypassed as an optimization, and therefore no
3728 21. Internal re-arrangement: the function for sending a challenge and reading
3729 a response while authentication was assuming a zero-terminated challenge
3730 string. It's now changed to take a pointer and a length, to allow for
3731 binary data in such strings.
3733 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3735 23. Exim was not respecting finduser_retries when seeking the login of the
3736 uid under which it was called; it was always trying 10 times. (The default
3737 setting of finduser_retries is zero.) Also, it was sleeping after the final
3738 failure, which is pointless.
3740 24. Implemented tls_on_connect_ports.
3742 25. Implemented acl_smtp_predata.
3744 26. If the domain in control=submission is set empty, Exim assumes that the
3745 authenticated id is a complete email address when it generates From: or
3746 Sender: header lines.
3748 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3749 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3750 chown and chgrp in /bin and hostname in /usr/bin.
3752 28. Exim was keeping the "process log" file open after each use, just as it
3753 does for the main log. This opens the possibility of it remaining open for
3754 long periods when the USR1 signal hits a daemon. Occasional processlog
3755 errors were reported, that could have been caused by this. Anyway, it seems
3756 much more sensible not to leave this file open at all, so that is what now
3759 29. The long-running daemon process does not normally write to the log once it
3760 has entered its main loop, and it closes the log before doing so. This is
3761 so that log files can straightforwardly be renamed and moved. However,
3762 there are a couple of unusual error situations where the daemon does write
3763 log entries, and I had neglected to close the log afterwards.
3765 30. The text of an SMTP error response that was received during a remote
3766 delivery was being truncated at 512 bytes. This is too short for some of
3767 the long messages that one sometimes sees. I've increased the limit to
3770 31. It is now possible to make retry rules that apply only when a message has a
3771 specific sender, in particular, an empty sender.
3773 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3774 it possible to be selective about when SMTP synchronization is enforced.
3776 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3778 32. Implemented hosts_connection_nolog.
3780 33. Added an ACL for QUIT.
3782 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3785 35. Added mailbox_size and mailbox_filecount to appendfile.
3787 36. Added control = no_multiline_responses to ACLs.
3789 37. There was a bug in the logic of the code that waits for the clock to tick
3790 in the case where the clock went backwards by a substantial amount such
3791 that the microsecond fraction of "now" was more than the microsecond
3792 fraction of "then" (but the whole seconds number was less).
3794 38. Added support for the libradius Radius client library this is found on
3795 FreeBSD (previously only the radiusclient library was supported).
3801 1. When certain lookups returned multiple values in the form name=value, the
3802 quoting of the values was not always being done properly. Specifically:
3803 (a) If the value started with a double quote, but contained no whitespace,
3805 (b) If the value contained whitespace other than a space character (i.e.
3806 tabs or newlines or carriage returns) it was not quoted.
3807 This fix has been applied to the mysql and pgsql lookups by writing a
3808 separate quoting function and calling it from the lookup code. The fix
3809 should probably also be applied to nisplus, ibase and oracle lookups, but
3810 since I cannot test any of those, I have not disturbed their existing code.
3812 2. A hit in the callout cache for a specific address caused a log line with no
3813 reason for rejecting RCPT. Now it says "Previous (cached) callout
3814 verification failure".
3816 3. There was an off-by-one bug in the queryprogram router. An over-long
3817 return line was truncated at 256 instead of 255 characters, thereby
3818 overflowing its buffer with the terminating zero. As well as fixing this, I
3819 have increased the buffer size to 1024 (and made a note to document this).
3821 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3822 when Exim is waiting for an SMTP response from a remote server, Exim
3823 restarts its select() call on the socket, thereby resetting its timeout.
3824 This is not a problem when such interrupts are rare. Somebody set up a cron
3825 job to run exiwhat every 2 minutes, which is less than the normal select()
3826 timeout (5 or 10 minutes). This meant that the select() timeout never
3827 kicked in because it was always reset. I have fixed this by comparing the
3828 time when an interrupt arrives with the time at the start of the first call
3829 to select(). If more time than the timeout has elapsed, the interrupt is
3830 treated as a timeout.
3832 5. Some internal re-factoring in preparation for the addition of Sieve
3833 extensions (by MH). In particular, the "personal" test is moved to a
3834 separate function, and given an option for scanning Cc: and Bcc: (which is
3835 not set for Exim filters).
3837 6. When Exim created an email address using the login of the caller as the
3838 local part (e.g. when creating a From: or Sender: header line), it was not
3839 quoting the local part when it contained special characters such as @.
3841 7. Installed new OpenBSD configuration files.
3843 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3844 try to make them clearer.
3846 9. Callout options, other than the timeout value, were being ignored when
3847 verifying sender addresses in header lines. For example, when using
3849 verify = header_sender/callout=no_cache
3851 the cache was (incorrectly) being used.
3853 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3854 only the Cygwin environment.
3856 11. When return_path_on_delivery was set as a log selector, if different remote
3857 addresses in the same message used different return paths and parallel
3858 remote delivery occurred, the wrong values would sometimes be logged.
3859 (Whenever a remote delivery process finished, the return path value from
3860 the most recently started remote delivery process was logged.)
3862 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3863 lines when AUTH and/or TLS are in use. This is the "received protocol"
3864 field. Exim used to use "asmtp" for authenticated SMTP, without any
3865 indication (in the protocol name) for TLS use. Now it follows the RFC and
3866 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3867 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3868 names appear in log lines as well as in Received: header lines.
3870 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3871 extensions, and comparison tests, and to fix some bugs.
3873 14. Changes to the "personal" filter test:
3875 (1) The test was buggy in that it was just doing the equivalent of
3876 "contains" tests on header lines. For example, if a user's address was
3877 anne@some.where, the "personal" test would incorrectly be true for
3879 To: susanne@some.where
3881 This test is now done by extracting each address from the header in turn,
3882 and checking the entire address. Other tests that are part of "personal"
3883 are now done using regular expressions (for example, to check local parts
3884 of addresses in From: header lines).
3886 (2) The list of non-personal local parts in From: addresses has been
3887 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3888 taken from the Sieve specification recommendations.
3890 (3) If the message contains any header line starting with "List-" it is
3891 treated as non-personal.
3893 (4) The test for "circular" in the Subject: header line has been removed
3894 because it now seems ill-conceived.
3896 15. Minor typos in src/EDITME comments corrected.
3898 16. Installed latest exipick from John Jetmore.
3900 17. If headers_add on a router specified a text string that was too long for
3901 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3902 of string_sprintf() is now avoided.
3904 18. $message_body_size was not set (it was always zero) when running the DATA
3905 ACL and the local_scan() function.
3907 19. For the "mail" command in an Exim filter, no default was being set for
3908 the once_repeat time, causing a random time value to be used if "once" was
3909 specified. (If the value happened to be <= 0, no repeat happened.) The
3910 default is now 0s, meaning "never repeat". The "vacation" command was OK
3911 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3912 (I found it when inspecting the code).
3914 20. There is now an overall timeout for performing a callout verification. It
3915 defaults to 4 times the callout timeout, which applies to individual SMTP
3916 commands during the callout. The overall timeout applies when there is more
3917 than one host that can be tried. The timeout is checked before trying the
3918 next host. This prevents very long delays if there are a large number of
3919 hosts and all are timing out (e.g. when the network connections are timing
3920 out). The value of the overall timeout can be changed by specifying an
3921 additional sub-option for "callout", called "maxwait". For example:
3923 verify = sender/callout=5s,maxwait=20s
3925 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3926 to the end before writing, but this should make it even safer).
3928 22. Exim was forgetting that it had advertised PIPELINING for the second and
3929 subsequent messages on an SMTP connection. It was also not resetting its
3930 memory on STARTTLS and an internal HELO.
3932 23. When Exim logs an SMTP synchronization error within a session, it now
3933 records whether PIPELINING has been advertised or not.
3935 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3936 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3937 rather than long int.
3939 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3941 26. Added the never_mail option to autoreply.
3947 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3948 crash if the getsockname() call failed; this can happen if a connection is
3949 closed very soon after it is established. The problem was simply in the
3950 order in which certain operations were done, causing Exim to try to write
3951 to the SMTP stream before it had set up the file descriptor. The bug has
3952 been fixed by making things happen in the correct order.
3958 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3959 before the connection was closed, thus losing the rejection response.
3961 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3962 some early Solaris releases, but causes trouble in current releases where
3963 socklen_t is defined.
3965 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3968 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3971 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3972 that releasing the top of it at the end releases what was used for sub-
3973 expansions (unless the block got too big). However, discard this block if
3974 the first thing is a variable or header, so that we can use its block when
3975 it is dynamic (useful for very large $message_headers, for example).
3977 6. Lookups now cache *every* query, not just the most recent. A new, separate
3978 store pool is used for this. It can be recovered when all lookup caches are
3979 flushed. Lookups now release memory at the end of their result strings.
3980 This has involved some general refactoring of the lookup sources.
3982 7. Some code has been added to the store_xxx() functions to reduce the amount
3983 of flapping under certain conditions.
3985 8. log_incoming_interface used to affect only the <= reception log lines. Now
3986 it causes the local interface and port to be added to several more SMTP log
3987 lines, for example "SMTP connection from", and rejection lines.
3989 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3991 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3993 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3994 could be overwritten at the end of the current message (or the start of a
3995 new message if it was set in a HELO ACL). The value is now preserved for
3996 the duration of the SMTP connection.
3998 12. If a transport had a headers_rewrite setting, and a matching header line
3999 contained an unqualified address, that address was qualified, even if it
4000 did not match any rewriting rules. The underlying bug was that the values
4001 of the flags that permit the existence of unqualified sender and recipient
4002 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4003 non-local messages, and by -bnq for local messages) were not being
4004 preserved with the message after it was received.
4006 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4007 "next input=" as part of the text comprising the host identity instead of
4008 the correct text. The code was using the same buffer for two different
4009 strings. However, depending on which order the printing function evaluated
4010 its arguments, the bug did not always show up. Under Linux, for example, my
4011 test suite worked just fine.
4013 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4014 doesn't work with some older versions of Perl. It has been changed to "my",
4015 which in any case is probably the better facility to use.
4017 15. A really picky compiler found some instances of statements for creating
4018 error messages that either had too many or two few arguments for the format
4021 16. The size of the buffer for calls to the DNS resolver has been increased
4022 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4023 for addresses that have a lot of PTR records. This alleviates a problem; it
4024 does not fully solve it.
4026 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4027 buffer now truncates the list and logs the incident, which is the same
4028 action as happens when Exim is looking up a host name and its aliases.
4029 Previously in this situation something unpredictable would happen;
4030 sometimes it was "internal error: store_reset failed".
4032 18. If a server dropped the connection unexpectedly when an Exim client was
4033 using GnuTLS and trying to read a response, the client delivery process
4034 crashed while trying to generate an error log message.
4036 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4037 string, for example:
4039 warn message = H1: something\nH2: something
4041 the text was added as a single header line from Exim's point of view
4042 though it ended up OK in the delivered message. However, searching for the
4043 second and subsequent header lines using $h_h2: did not work. This has been
4044 fixed. Similarly, if a system filter added multiple headers in this way,
4045 the routers could not see them.
4047 20. Expanded the error message when iplsearch is called with an invalid key to
4048 suggest using net-iplsearch in a host list.
4050 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4051 ACLs are no longer actually imposed (and a message to that effect is
4054 22. If a "gecos" field in a passwd entry contained escaped characters, in
4055 particular, if it contained a \" sequence, Exim got it wrong when building
4056 a From: or a Sender: header from that name. A second bug also caused
4057 incorrect handling when an unquoted " was present following a character
4058 that needed quoting.
4060 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4061 was not being matched caselessly.
4063 24. Arranged for all hyphens in the exim.8 source to be escaped with
4066 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4067 properly. Recipient callout cache records were still being keyed to include
4068 the sender, even when use_sender was set false. This led to far more
4069 callouts that were necessary. The sender is no longer included in the key
4070 when use_sender is false.
4072 26. Added "control = submission" modifier to ACLs.
4074 27. Added the ${base62d: operator to decode base 62 numbers.
4076 28. dnsdb lookups can now access SRV records.
4078 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4079 the configuration file.
4081 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4082 (-v) mode. This makes the output for a verbose queue run more intelligible.
4084 31. Added a use_postmaster feature to recipient callouts.
4086 32. Added the $body_zerocount variable, containing the number of binary zero
4087 bytes in the message body.
4089 33. The time of last modification of the "new" subdirectory is now used as the
4090 "mailbox time last read" when there is a quota error for a maildir
4093 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4095 35. Added +ignore_unknown as a special item in host lists.
4097 36. Code for decoding IPv6 addresses in host lists is now included, even if
4098 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4099 address was recognized as an IP address, but was then not correctly decoded
4100 into binary, causing unexpected and incorrect effects when compared with
4107 1. Very minor rewording of debugging text in manualroute to say "list of
4108 hosts" instead of "hostlist".
4110 2. If verify=header_syntax was set, and a header line with an unqualified
4111 address (no domain) and a large number of spaces between the end of the
4112 name and the colon was received, the reception process suffered a buffer
4113 overflow, and (when I tested it) crashed. This was caused by some obsolete
4114 code that should have been removed. The fix is to remove it!
4116 3. When running in the test harness, delay a bit after writing a bounce
4117 message to get a bit more predictability in the log output.
4119 4. Added a call to search_tidyup() just before forking a reception process. In
4120 theory, someone could use a lookup in the expansion of smtp_accept_max_
4121 per_host which, without the tidyup, could leave open a database connection.
4123 5. Added the variables $recipient_data and $sender_data which get set from a
4124 lookup success in an ACL "recipients" or "senders" condition, or a router
4125 "senders" option, similar to $domain_data and $local_part_data.
4127 6. Moved the writing of debug_print from before to after the "senders" test
4130 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4131 problems for message scanning, either using a data ACL, or using
4132 local_scan() because the Received: header was not generated till after they
4133 were called (in order to set the time as the time of reception completion).
4134 I have revised the way this works. The header is now generated after the
4135 body is received, but before the ACL or local_scan() are called. After they
4136 are run, the timestamp in the header is updated.
4142 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4143 before starting a queue runner without re-exec. This happened only when
4144 deliver_drop_privilege was set or when the Exim user was set to root. The
4145 effect of the bug was that timeouts during subsequent deliveries caused
4146 crashes instead of being properly handled. The handler is now left at its
4147 default (and expected) setting.
4149 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4150 message, again when deliver_drop_privilege is set or Exim is run as root.
4151 The bug described in (1) was not present in this case, but the tidying up
4152 of the other signals was missing. I have made the two cases consistent.
4154 3. The ignore_target_hosts setting on a manualroute router was being ignored
4155 for hosts that were looked up using the /MX notation.
4157 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4160 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4161 operated on the sender address. After changing the $sender_address to <>
4162 for the sender address verify, Exim was re-instated it as the original
4163 (before rewriting) address, but remembering that it had rewritten it, so it
4164 wasn't rewriting it again. This bug also had the effect of breaking the
4165 sender address verification caching when the sender address was rewritten.
4167 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4168 This has been changed so that if the ip literal address matches
4169 ignore_target_hosts, the router declines.
4171 7. Added expansion conditions match_domain, match_address, and match_local_
4172 part (NOT match_host).
4174 8. The placeholder for the Received: header didn't have a length field set.
4176 9. Added code to Exim itself and to exim_lock to test for a specific race
4177 condition that could lead to file corruption when using MBX delivery. The
4178 issue is with the lockfile that is created in /tmp. If this file is removed
4179 after a process has opened it but before that process has acquired a lock,
4180 there is the potential for a second process to recreate the file and also
4181 acquire a lock. This could lead to two Exim processes writing to the file
4182 at the same time. The added code performs the same test as UW imapd; it
4183 checks after acquiring the lock that its file descriptor still refers to
4184 the same named file.
4186 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4187 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4190 11. Added the smtp_active_hostname option. If used, this will typically be made
4191 to depend on the incoming interface address. Because $interface_address is
4192 not set up until the daemon has forked a reception process, error responses
4193 that can happen earlier (such as "too many connections") no longer contain
4196 12. If an expansion in a condition on a "warn" statement fails because a lookup
4197 defers, the "warn" statement is abandoned, and the next ACL statement is
4198 processed. Previously this caused the whole ACL to be aborted.
4200 13. Added the iplsearch lookup type.
4202 14. Added ident_timeout as a log selector.
4204 15. Added tls_certificate_verified as a log selector.
4206 16. Added a global option tls_require_ciphers (compare the smtp transport
4207 option of the same name). This controls incoming TLS connections.
4209 17. I finally figured out how to make tls_require_ciphers do a similar thing
4210 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4211 before starting the TLS session.
4213 18. Tabs are now shown as \t in -bP output.
4215 19. If the log selector return_path_on_delivery was set, Exim crashed when
4216 bouncing a message because it had too many Received: header lines.
4218 20. If two routers both had headers_remove settings, and the first one included
4219 a superfluous trailing colon, the final name in the first list and the
4220 first name in the second list were incorrectly joined into one item (with a
4221 colon in the middle).
4227 1. Added -C and -D options to the exinext utility, mainly to make it easier
4228 to include in the automated testing, but these could be helpful when
4229 multiple configurations are in use.
4231 2. The exinext utility was not formatting the output nicely when there was
4232 an alternate port involved in the retry record key, nor when there was a
4233 message id as well (for retries that were specific to a specific message
4234 and a specific host). It was also confused by IPv6 addresses, because of
4235 the additional colons they contain. I have fixed the IPv4 problem, and
4236 patched it up to do a reasonable job for IPv6.
4238 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4239 delivery, the log line now contains "pipelined" if PIPELINING was used.
4241 4. An SMTP transport process used to panic and die if the bind() call to set
4242 an explicit outgoing interface failed. This has been changed; it is now
4243 treated in the same way as a connect() failure.
4245 5. A reference to $sender_host_name in the part of a conditional expansion
4246 that was being skipped was still causing a DNS lookup. This no longer
4249 6. The def: expansion condition was not recognizing references to header lines
4250 that used bh_ and bheader_.
4252 7. Added the _cache feature to named lists.
4254 8. The code for checking quota_filecount in the appendfile transport was
4255 allowing one more file than it should have been.
4257 9. For compatibility with Sendmail, the command line option
4265 and sets the incoming protocol and host name (for trusted callers). The
4266 host name and its colon can be omitted when only the protocol is to be set.
4267 Note the Exim already has two private options, -pd and -ps, that refer to
4268 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4269 "s", but I don't think that's a major issue.
4271 10. A number of refactoring changes to the code, none of which should affect
4274 (a) The number of logging options was getting close to filling up the
4275 32-bit word that was used as a bit map. I have split them into two classes:
4276 those that are passed in the argument to log_write(), and those that are
4277 only ever tested independently outside of that function. These are now in
4278 separate 32-bit words, so there is plenty of room for expansion again.
4279 There is no change in the user interface or the logging behaviour.
4281 (b) When building, for example, log lines, the code previously used a
4282 macro that called string_cat() twice, in order to add two strings. This is
4283 not really sufficiently general. Furthermore, there was one instance where
4284 it was actually wrong because one of the argument was used twice, and in
4285 one call a function was used. (As it happened, calling the function twice
4286 did not affect the overall behaviour.) The macro has been replaced by a
4287 function that can join an arbitrary number of extra strings onto a growing
4290 (c) The code for expansion conditions now uses a table and a binary chop
4291 instead of a serial search (which was left over from when there were very
4292 few conditions). Also, it now recognizes conditions like "pam" even when
4293 the relevant support is not compiled in: a suitably worded error message is
4294 given if an attempt is made to use such a condition.
4296 11. Added ${time_interval:xxxxx}.
4298 12. A bug was causing one of the ddress fields not to be passed back correctly
4299 from remote delivery subprocesses. The field in question was not being
4300 subsequently used, so this caused to problems in practice.
4302 13. Added new log selectors queue_time and deliver_time.
4304 14. Might have fixed a bug in maildirsizefile handling that threw up
4305 "unexpected character" debug warnings, and recalculated the data
4306 unnecessarily. In any case, I expanded the warning message to give more
4309 15. Added the message "Restricted characters in address" to the statements in
4310 the default ACL that block characters like @ and % in local parts.
4312 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4313 Three changes have been made:
4315 (a) There was a serious bug; a negative response to MAIL caused the whole
4316 recipient domain to be cached as invalid, thereby blocking all messages
4317 to all local parts at the same domain, from all senders. This bug has
4318 been fixed. The domain is no longer cached after a negative response to
4319 MAIL if the sender used is not empty.
4321 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4324 (c) A new callout option, "use_sender" has been added for people who want
4325 the modified behaviour.
4331 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4334 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4335 indeed breaks things for older releases.
4337 3. Added additional logging to the case where there is a problem reading data
4338 from a filter that is running in a subprocess using a pipe, in order to
4339 try to track down a specific problem.
4341 4. Testing facility fudge: when running in the test harness and attempting
4342 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4343 getting "No route to host". Convert this to a timeout.
4345 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4348 6. Some OS don't have socklen_t but use size_t instead. This affects the
4349 fifth argument of getsockopt() amongst other things. This is now
4350 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4351 can be set for individual OS. I have set it for SunOS5, OSF1, and
4352 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4353 some earlier ones do not.
4355 7. Change 4.30/15 was not doing the test caselessly.
4357 8. The standard form for an IPv6 address literal was being rejected by address
4358 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4359 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4360 this, as well as the form without the "IPv6" on the front (but only when
4361 address literals are enabled, of course).
4363 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4365 10. Exim crashed if a message with an empty sender address specified by -f
4366 encountered a router with an errors_to setting. This could be provoked only
4367 by a command such as
4371 where an empty string was supplied; "<>" did not hit this bug.
4373 11. Installed PCRE release 4.5.
4375 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4376 remained set. It is now erased.
4378 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4379 times from message ids (which are base 36 rather than the normal 62).
4381 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4382 were being counted as actual protocol errors, and logged if the log
4383 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4384 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4385 and DATA following a set of rejected RCPTs do not count as protocol errors.
4386 In other words, Exim assumes they were pipelined, though this may not
4387 actually be the case. Of course, in all cases the client gets an
4388 appropriate error code.
4390 15. If a lookup fails in an ACL condition, a message about the failure may
4391 be available; it is used if testing the ACL cannot continue, because most
4392 such messages specify what the cause of the deferral is. However, some
4393 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4394 that caused an old message to be retained and used if a later statement
4395 caused a defer, replacing the real cause of the deferral.
4397 16. If an IP address had so many PTR records that the DNS lookup buffer
4398 was not large enough to hold them, Exim could crash while trying to process
4399 the truncated data. It now detects and logs this case.
4401 17. Further to 4.21/58, another change has been made: if (and only if) the
4402 first line of a message (the first header line) ends with CRLF, a bare LF
4403 in a subsequent header line has a space inserted after it, so as not to
4404 terminate the header.
4406 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4407 unnecessarily, used atoi() instead of strtol(), and didn't check the
4408 termination when getting file sizes from file names by regex.
4410 19. Completely re-implemented the support for maildirsize files, in the light
4411 of a number of problems with the previous contributed implementation
4412 (4.30/29). In particular:
4414 . If the quota is zero, the maildirsize file is maintained, but no quota is
4417 . If the maildir directory does not exist, it is created before any attempt
4418 to write a maildirsize file.
4420 . The quota value in the file is just a cache; if the quota is changed in
4421 the transport, the new value overrides.
4423 . A regular expression is available for excluding directories from the
4426 20. The autoreply transport checks the characters in options that define the
4427 message's headers; it allows continued headers, but it was checking with
4428 isspace() after an embedded newline instead of explicitly looking for a
4431 21. If all the "regular" hosts to which an address was routed had passed their
4432 expiry times, and had not reached their retry times, the address was
4433 bounced, even if fallback hosts were defined. Now Exim should go on to try
4436 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4437 equivalent code in the SMTP transport. Some hosts send humungous responses
4438 to HELO/EHLO, more than 1024 it seems.
4440 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4441 gives compiler warnings in some environments. I've now done it "properly",
4444 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4445 (because of problems with the built-in one) was declared to return uschar *
4446 instead of char *, causing compiler failure.
4448 25. Fixed a file descriptor leak when processing alias/forward files.
4450 26. Fixed a minor format string issue in dbfn.c.
4452 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4454 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4455 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4458 29. When a sender address is verified, it is cached, to save repeating the test
4459 when there is more than one recipient in a message. However, when the
4460 verification involves a callout, it is possible for different callout
4461 options to be set for different recipients. It is too complicated to keep
4462 track of this in the cache, so now Exim always runs a verification when a
4463 callout is required, relying on the callout cache for the optimization.
4464 The overhead is duplication of the address routing, but this should not be
4467 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4468 to be verified with callout=postmaster, and the main callout worked but the
4469 postmaster check failed, the verification correctly failed. However, if a
4470 subsequent RCPT command asked for sender verification *without* the
4471 postmaster check, incorrect caching caused this verification also to fail,
4474 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4475 it was not caching the DNS options (qualify_single, search_parents) that
4476 were used when the lookup failed. A subsequent lookup with different
4477 options therefore always gave the same answer, though there were cases
4478 where it should not have. (Example: a "domains = !$mx_any" option on a
4479 dnslookup router: the "domains" option is always processed without any
4480 widening, but the router might have qualify_single set.) Now Exim uses the
4481 cached value only when the same options are set.
4483 32. Added John Jetmore's "exipick" utility to the distribution.
4485 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4486 than a timeout (e.g. a certificate is required, and is not provided), an
4487 Exim server now closes the connection immediately. Previously it waited for
4488 the client to close - but if the client is SSL, it seems that they each
4489 wait for each other, leading to a delay before one of them times out.
4491 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4492 maintained 0.8.x compatibility because I don't think many are using it, and
4493 it is clearly obsolete.
4495 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4498 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4499 client certificate was expired. A simple patch fixes this, though I don't
4500 understand the full logic of why the verify callback is called multiple
4503 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4504 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4505 which causes problems with some clients (such as the Certicom SSL Plus
4506 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4507 disables the coutermeasure allowing Eudora to connect."
4509 38. Exim was not checking that a write() to a log file succeeded. This could
4510 lead to Bad Things if a log got too big, in particular if it hit a file
4511 size limit. Exim now panics and dies if it cannot write to a log file, just
4512 as it does if it cannot open a log file.
4514 39. Modified OS/Makefile-Linux so that it now contains
4516 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4518 The two -D definitions ensure that Exim is compiled with large file
4519 support, which makes it possible to handle log files that are bigger than
4522 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4523 instance) a domain was checked against a named list that involved a lookup,
4524 causing $domain_data to be set, then another domain was checked against the
4525 same list, then the first domain was re-checked, the value of $domain_data
4526 after the final check could be wrong. In particular, if the second check
4527 failed, it could be set empty. This bug probably also applied to
4530 41. The strip_trailing_dot option was not being applied to the address given
4531 with the -f command-line option.
4533 42. The code for reading a message's header from the spool was incrementing
4534 $received_count, but never initializing it. This meant that the value was
4535 incorrect (doubled) while delivering a message in the same process in which
4536 it was received. In the most common configuration of Exim, this never
4537 happens - a fresh exec is done - but it can happen when
4538 deliver_drop_privilege is set.
4540 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4541 it now includes up to 150 characters of the unexpected data in the log
4544 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4545 and building data strings. The size of both of these buffers was 10 000
4546 bytes - far larger than anybody would *ever* want, thought I. Needless to
4547 say, somebody hit the limit. I have increased the maximum line length to
4548 20 000 and the maximum data length of concatenated lines to 100 000. I have
4549 also fixed two bugs, because there was no checking on these buffers. Tsk,
4550 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4551 buffer is too small.
4553 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4554 lsearch lookups. Now it does.
4556 46. When parsing a route_list item in a manualroute router, a fixed-length
4557 buffer was used for the list of hosts. I made this 1024 bytes long,
4558 thinking that nobody would ever have a list of hosts that long. Wrong.
4559 Somebody had a whole pile of complicated expansion conditions, and the
4560 string was silently truncated, leading to an expansion error. It turns out
4561 that it is easier to change to an unlimited length (owing to other changes
4562 that have happened since this code was originally written) than to build
4563 structure for giving a limitation error. The length of the item that
4564 expands into the list of hosts is now unlimited.
4566 47. The lsearch lookup could not handle data where the length of text line was
4567 more than 4095 characters. Such lines were truncated, leading to shortened
4568 data being returned. It should now handle lines of any length.
4570 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4571 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4574 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4575 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4576 no longer happens in comment lines. A list of replacements is now placed
4577 at the head of all of the source files, except those whose only change is
4578 to replace PERL_COMMAND in the very first #! line.
4580 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4581 messages on the queue, with a bottom-up merge sort, using code contributed
4582 by Michael Haardt. This should make operations like -bp somewhat faster on
4583 large queues. It won't affect queue runners, except when queue_run_in_order
4586 51. Installed eximstats 1.31 in the distribution.
4588 52. Added support for SRV lookups to the dnslookup router.
4590 53. If an ACL referred to $message_body or $message_body_end, the value was not
4591 reset for any messages that followed in the same SMTP session.
4593 54. The store-handling optimization for building very long strings was not
4594 differentiating between the different store pools. I don't think this
4595 actually made any difference in practice, but I've tidied it.
4597 55. While running the routers to verify a sender address, $sender_address
4598 was still set to the sender address. This is wrong, because when routing to
4599 send a bounce to the sender, it would be empty. Therefore, I have changed
4600 it so that, while verifying a sender address, $sender_address is set to <>.
4601 (There is no change to what happens when verifying a recipient address.)
4603 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4604 target A or AAAA records (if not already returned) without resetting the
4605 qualify_single or search_parents options of the DNS resolver. These are
4606 inappropriate in this case because the targets of MX and SRV records must
4607 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4608 target that, when qualified, matched something in the local domain. These
4609 two options are now turned off when doing these lookups.
4611 57. It seems that at least some releases of Reiserfs (which does not have the
4612 concept of a fixed number of inodes) returns zero and not -1 for the
4613 number of available inodes. This interacted badly with check_spool_inodes,
4614 which assumed that -1 was the "no such thing" setting. What I have done is
4615 to check that the total number of inodes is greater than zero before doing
4616 the test of how many are available.
4618 58. When a "warn" ACL statement has a log_message modifier, the message is
4619 remembered, and not repeated. This is to avoid a lot of repetition when a
4620 message has many recipients that cause the same warning to be written.
4621 Howewer, Exim was preserving the list of already written lines for an
4622 entire SMTP session, which doesn't seem right. The memory is now reset if a
4623 new message is started.
4625 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4626 debugging output unless log_rewrite was also set.
4628 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4629 of (int)(handle) when we know that handle contains (void *)(-1).
4631 61. The Exim daemon panic-logs an error return when it closes the incoming
4632 connection. However "connection reset by peer" seems to be common, and
4633 isn't really an error worthy of noting specially, so that particular error
4636 62. When Exim is trying to find all the local interfaces, it used to panic and
4637 die if the ioctl to get the interface flags failed. However, it seems that
4638 on at least one OS (Solaris 9) it is possible to have an interface that is
4639 included in the list of interfaces, but for which you get a failure error
4640 for this call. This happens when the interface is not "plumbed" into a
4641 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4642 failure of the "get flags" call assumes that the interface is down.
4644 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4645 makes life easier for people who are doing arithmetic on fields extracted
4646 from dates, where you often get leading zeros that should not be
4647 interpreted as octal.
4649 64. Added qualify_domain to the redirect router, to override the global
4652 65. If a pathologically long header line contained very many addresses (the
4653 report of this problem mentioned 10 000) and each of them was rewritten,
4654 Exim could use up a very large amount of memory. (It kept on making new
4655 copies of the header line as it rewrote, and never released the old ones.)
4656 At the expense of a bit more processing, the header rewriting function has
4657 been changed so that it no longer eats memory in this way.
4659 66. The generation of the Received: header has been moved from the time that a
4660 message starts to be received, to the time that it finishes. The timestamp
4661 in the Received: header should now be very close to that of the <= log
4662 line. There are two side-effects of this change:
4664 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4665 logged header lines no longer include the local Received: line, because
4666 it has not yet been created. The same applies to a copy of the message
4667 that is returned to a non-SMTP sender when a message is rejected.
4669 (b) When a filter file is tested using -bf, no additional Received: header
4670 is added to the test message. After some thought, I decided that this
4673 This change does not affect the value of $received_for. It is still set
4674 after address rewriting, but before local_scan() is called.
4676 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4678 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4679 gave an unhelpful panic error message, and a defer error. I have managed to
4680 change this behaviour so that it now rejects any supplied certificate,
4681 which seems right, as the list of acceptable certificates is empty.
4683 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4684 gave an unhelpful defer error. I have not managed to make this reject any
4685 supplied certificates, but the error message it gives is "no certificate
4686 supplied", which is not helpful.
4688 70. exigrep's output now also includes lines that are not associated with any
4689 message, but which match the given pattern. Implemented by a patch from
4690 Martin Sluka, which also tidied up the Perl a bit.
4692 71. Recipient callout verification, like sender verification, was using <> in
4693 the MAIL FROM command. This isn't really the right thing, since the actual
4694 sender may affect whether the remote host accepts the recipient or not. I
4695 have changed it to use the actual sender in the callout; this means that
4696 the cache record is now keyed on a recipient/sender pair, not just the
4697 recipient address. There doesn't seem to be a real danger of callout loops,
4698 since a callout by the remote host to check the sender would use <>.
4699 [SEE ABOVE: changed after hitting problems.]
4701 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4702 temporary errors. However, in the case of such a code being given after
4703 the end of a data transmission (i.e. after ".") Exim was failing to write
4704 a retry record for the message. (Yes, there was some broken host that was
4705 actually sending 8xx at this point.)
4707 73. An unknown lookup type in a host list could cause Exim to panic-die when
4708 the list was checked. (An example that provoked this was putting <; in the
4709 middle of a list instead of at the start.) If this happened during a DATA
4710 ACL check, a -D file could be left lying around. This kind of configuration
4711 error no longer causes Exim to die; instead it causes a defer errror. The
4712 incident is still logged to the main and panic logs.
4714 74. Buglet left over from Exim 3 conversion. The message "too many messages
4715 in one connection" was written to the rejectlog but not the mainlog, except
4716 when address rewriting (yes!) was being logged.
4718 75. Added write_rejectlog option.
4720 76. When a system filter was run not as root (that is, when system_filter_user
4721 was set), the values of the $n variables were not being returned to the
4722 main process; thus, they were not subsequently available in the $sn
4725 77. Added +return_path_on_delivery log selector.
4727 78. A connection timeout was being treated differently from recipients deferred
4728 when testing hosts_max_try with a message that was older than the host's
4729 retry timeout. (The host should not be counted, thus allowing all hosts to
4730 be tried at least once before bouncing.) This may have been the cause of an
4731 occasionally reported bug whereby a message would remain on the queue
4732 longer than the retry timeout, but would be bounced if a delivery was
4733 forced. I say "may" because I never totally pinned down the problem;
4734 setting up timeout/retry tests is difficult. See also the next item.
4736 79. The ultimate address timeout was not being applied to errors that involved
4737 a combination of host plus message (for example, a timeout on a MAIL
4738 command). When an address resolved to a number of possible hosts, and they
4739 were not all tried for each delivery (e.g. because of hosts_max_try), a
4740 message could remain on the queue longer than the retry timeout.
4742 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4745 81. Fixed an obscure SMTP outgoing bug which required at least the following
4746 conditions: (a) there was another message waiting for the same server;
4747 (b) the server returned 5xx to all RCPT commands in the first message so
4748 that the message was not completed; (c) the server dropped the connection
4749 or gave a negative response to the RSET that Exim sends to abort the
4750 transaction. The observed case was a dropped connection after DATA that had
4751 been sent in pipelining mode. That is, the server had advertised PIPELINING
4752 but was not implementing it correctly. The effect of the bug was incorrect
4753 behaviour, such as trying another host, and this could lead to a crash.
4759 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4760 and daemon.c were passed as pointers to ints; they should have been
4761 pointers to socklen_t variables (which are typically unsigned ints).
4763 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4766 3. Fixed a really odd bug that affected only the testing scheme; patching a
4767 certain fixed string in the binary changed the value of another string that
4768 happened to be identical to the end of the original first string.
4770 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4771 name", it returns that address as the IP address. On some operating
4772 systems (e.g. Solaris), it also passes back the IP address string as the
4773 "host name". However, on others (e.g. Linux), it passes back an empty
4774 string. Exim wasn't checking for this, and was changing the host name to an
4775 empty string, assuming it had been canonicized.
4777 5. Although rare, it is permitted to have more than one PTR record for a given
4778 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4779 all the names associated with an address, because they do in Solaris.
4780 However, it seems that they do not in Linux for data that comes from the
4781 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4782 I found this out when I moved to a new Linux workstation and tried to run
4783 the Exim test suite.
4785 To get round this problem I have changed the code so that it now does its
4786 own call to the DNS to look up PTR records when searching for a host name.
4787 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4788 addresses that are only in /etc/hosts are still found.
4790 This behaviour is, however, controlled by an option called host_lookup_
4791 order, which defaults to "bydns:byaddr". If people want to use the other
4792 order, or indeed, just use one or the other means of lookup, they can
4793 specify it in this variable.
4795 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4796 some operating systems, this comes back from gethostbyaddr() as an empty
4797 string, and this is what Exim used to test for. However, it seems that in
4798 other systems, "." is yielded. Exim now tests for this case too.
4800 7. The values of check_spool_space and check_log_space are now held internally
4801 as a number of kilobytes instead of an absolute number of bytes. If a
4802 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4803 kilobyte. This means that much larger values can be stored.
4805 8. Exim monitor: an attempt to get the action menu when not actually pointing
4806 at a message produces an empty menu entitled "No message selected". This
4807 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4808 no entries in it ("Shell widget menu has zero width and/or height"). So I
4809 have added a single, blank menu entry in this case.
4811 9. Added ${quote_local_part.
4813 10. MIME decoding is now applied to the contents of Subject: header lines when
4816 11. Now that a reference to $sender_host_address automatically causes a reverse
4817 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4818 host lookup before query-style lookups in lists that might use this
4819 variable. This has therefore been abolished, and the "net-" prefix is no
4820 longer necessary for query-style lookups.
4822 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4823 have been a typo for LFLAGS, so it has been changed.
4825 13. The install script calls Exim with "-C /dev/null" in order to find the
4826 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4827 to be output. Howeve, since Exim outputs its version number before the
4828 error, it didn't break the script. It just looked ugly. I fixed this by
4829 always allowing "-C /dev/null" if the caller is root.
4831 14. Ignore overlarge ACL variable number when reading spool file - insurance
4832 against a later release with more variables having written the file.
4834 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4835 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4836 this, as well as the form without the "IPv6" on the front.
4838 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4839 OS/Makefile-Darwin file.
4841 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4842 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4844 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4845 variable. However, some OS use ints for inodes. I've added cast to long int
4846 to get rid of the compiler warning.
4848 19. I had forgotten to lock out "/../" in configuration file names when
4849 ALT_CONFIG_PREFIX was set.
4851 20. Routers used for verification do not need to specify transports. However,
4852 if such a router generated a host list, and callout was configured, Exim
4853 crashed, because it could not find a port number from the (non-existent)
4854 transport. It now assumes port 25 in this circumstance.
4856 21. Added the -t option to exigrep.
4858 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4859 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4860 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4861 them is set, LOOKUP_LSEARCH is forced.
4863 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4865 24. Added sender and host information to the "rejected by local_scan()" log
4866 line; previously there was no indication of these.
4868 25. Added .include_if_exists.
4870 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4871 Linux. It turns out that not all file systems support this. Apparently some
4872 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4873 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4874 not supported on the file descriptor, is now ignored when Exim is trying to
4875 sync a directory. This applies only to Linux.
4877 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4879 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4880 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4883 29. Added support for maildirsize files from supplied patch (modified a bit).
4885 30. The use of :fail: followed by an empty string could lead Exim to respond to
4886 sender verification failures with (e.g.):
4888 550 Verification failed for <xxx>
4889 550 Sender verify failed
4891 where the first response line was missing the '-' that indicates it is not
4892 the final line of the response.
4894 31. The loop for finding the name of the user that called Exim had a hardwired
4895 limit of 10; it now uses the value of finduser_retries, which is used for
4896 all other user lookups.
4898 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4901 33. Exim was neglecting to zero errno before one call of strtol() when
4902 expanding a string and expecting an integer value. On some systems this
4903 resulted in spurious "integer overflow" errors. Also, it was casting the
4904 result into an int without checking.
4906 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4907 did not work. The code looks as if it has *never* worked, though it appears
4908 to have been documented since at least releast 1.62. I have made it work.
4910 35. The "timeout_DNS" error in retry rules, also documented since at least
4911 1.62, also never worked. As it isn't clear exactly what this means, and
4912 clearly it isn't a major issue, I have abolished the feature by treating it
4913 as "timeout", and writing a warning to the main and panic logs.
4915 36. The display of retry rules for -brt wasn't always showing the error code
4918 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4919 timeout_connect_A, timeout_connect_MX.
4921 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4922 to the empty sender.
4924 39. The daemon was not analysing the content of -oX till after it had closed
4925 stderr and disconnected from the controlling terminal. This meant that any
4926 syntax errors were only noted on the panic log, and the return code from
4927 the command was 0. By re-arranging the code a little, I've made the
4928 decoding happen first, so such errors now appear on stderr, and the return
4929 code is 1. However, the actual setting up of the sockets still happens in
4930 the disconnected process, so errors there are still only recorded on the
4933 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4934 connections (as happens on some IP stacks) was logged at start up time as
4935 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4936 it from "IPv6 and IPv4", which means that two separate sockets are being
4939 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4940 says whether AF_INET or AF_INET6 was passed as an argument.
4942 42. Exiwhat output was messed up when time zones were included in log
4945 43. Exiwhat now gives more information about the daemon's listening ports,
4946 and whether -tls-on-connect was used.
4948 44. The "port" option of the smtp transport is now expanded.
4950 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4951 silently ignored. Now an error message is written to the main and panic
4954 46. There's a new ACL modifier called "logwrite" which writes to a log file
4955 as soon as it is encountered.
4957 47. Added $local_user_uid and $local_user_gid at routing time.
4959 48. Exim crashed when trying to verify a sender address that was being
4962 49. Exim was recognizing only a space character after ".include". It now also
4963 recognizes a tab character.
4965 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4966 extracting the relevant information from the specification. The man page no
4967 longer contains scrambled data for the -d option, and I've added a section
4968 at the front about calling Exim under different names.
4970 51. Added "extra_headers" argument to the "mail" command in filter files.
4972 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4975 53. Installed eximstats 1.29.
4977 54. Added transport_filter_timeout as a generic transport option.
4979 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4980 Cc: header lines. This was required by RFC 822, but it not required by RFC
4983 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4984 incoming messages that did not have them. Now it does so only if the
4985 message originates locally, that is, if there is no associated remote host
4986 address. When Resent- header lines are present, this applies to the Resent-
4987 lines rather than the non-Resent- lines.
4989 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4990 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4992 58. Messages for configuration errors now include the name of the main
4993 configuration file - useful now that there may be more than one file in a
4994 list (.included file names were always shown).
4996 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4997 for those rare installations that do not start the daemon as root or run it
4998 setuid root. I've cut out the call to initgroups() if the daemon is not
5001 60. The Exim user and group can now be bound into the binary as text strings
5002 that are looked up at the start of Exim's processing.
5004 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5006 62. Added $mailstore_basename variable.
5008 63. Installed patch to sieve.c from Michael Haardt.
5010 64. When Exim failed to open the panic log after failing to open the main log,
5011 the original message it was trying to log was written to stderr and debug
5012 output, but if they were not available (the usual case in production), it
5013 was lost. Now it is written to syslog before the two lines that record the
5014 failures to open the logs.
5016 65. Users' Exim filters run in subprocesses under the user's uid. It is
5017 possible for a "deliver" command or an alias in a "personal" command to
5018 provoke an address rewrite. If logging of address rewriting is configured,
5019 this fails because the process is not running as root or exim. There may be
5020 a better way of dealing with this, but for the moment (because 4.30 needs
5021 to be released), I have disabled address rewrite logging when running a
5022 filter in a non-root, non-exim process.
5028 1. The buildconfig auxiliary program wasn't quoting the value set for
5029 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5030 not defined. This bug was masked in 4.22 by the effect that was fixed in
5033 2. Some messages that were rejected after a message id was allocated were
5034 shown as "incomplete" by exigrep. It no longer does this for messages that
5035 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5037 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5038 have allow_domain_literals set, the ID did not get logged in the <= line.
5039 Domain literals are now always recognized in Message-ID: header lines.
5041 4. The first argument for a ${extract expansion item is the key name or field
5042 number. Leading and trailing spaces in this item were not being ignored,
5043 causing some misleading effects.
5045 5. When deliver_drop_privilege was set, single queue runner processes started
5046 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5047 same command in the process it spins off) were not dropping privilege.
5049 6. When the daemon running as "exim" started a queue runner, it always
5050 re-executed Exim in the spun-off process. This is a waste of effort when
5051 deliver_drop_privilege is set. The new process now just calls the
5052 queue-runner function directly.
5058 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5061 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5062 ignored. Though the use of -oP was forcing the writing of a pid file, it
5063 was always written to the default place.
5065 3. If the message "no IP address found for host xxxx" is generated during
5066 incoming verification, it is now followed by identification of the incoming
5067 connection (so you can more easily find what provoked it).
5069 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5071 5. Added some features to "harden" Exim a bit more against certain attacks:
5073 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5074 be put in Local/Makefile. This is like the never_users runtime option,
5075 but it cannot be overridden. The default setting is "root".
5077 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5078 prefix string with which any file named in a -C command line option
5081 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5082 is retained for -C and -D only if the caller of Exim is root. Without
5083 it, the exim user may also use -C and -D and retain privilege.
5085 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5086 command line option is disabled.
5088 6. Macro names set by the -D option must start with an upper case letter, just
5089 like macro names defined in the configuration file.
5091 7. Added "dereference=" facility to LDAP.
5093 8. Two instances of the typo "uknown" in the source files are fixed.
5095 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5096 the Configure-Makefile script screwed up while processing it.
5098 10. Incorporated PCRE 4.4.
5100 11. The SMTP synchronization check was not operating right at the start of an
5101 SMTP session. For example, it could not catch a HELO sent before the client
5102 waited for the greeting. There is now a check for outstanding input at the
5103 point when the greeting is written. Because of the duplex, asynchronous
5104 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5105 way, but not yet received, when the check is performed.
5107 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5108 on TCP/IP sockets, because this apparently causes some broken clients to
5111 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5112 unchanged) from the Cygwin maintainer.
5114 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5115 was supported instead of testing for mbx. Effectively a typo.
5117 15. The spa authenticator server code was not checking that the input it
5118 received was valid base64.
5120 16. The debug output line for the "set" modifier in ACLs was not showing the
5121 name of the variable that was being set.
5123 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5125 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5126 lookup on its own. Something else was needed to trigger the lookup. For
5127 example, a match in host_lookup or the need for a host name in a host list.
5128 Now, if $sender_host_name is referenced and the host name has not yet been
5129 looked up, a lookup is performed. If the lookup fails, the variable remains
5130 empty, and $host_lookup_failed is set to "1".
5132 19. Added "eqi" as a case-independent comparison operator.
5134 20. The saslauthd authentication condition could segfault if neither service
5135 nor realm was specified.
5137 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5138 error message that was logged was misleading, and incoming SMTP
5139 connections were dropped. The message is now more accurate, and temporary
5140 errors are given to SMTP connections.
5142 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5143 (except RSET) with a 421 error, until QUIT is received. However, it was
5144 failing to send a response to QUIT.
5146 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5147 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5148 ACL is now run after the helo_try_verify_hosts code.
5150 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5151 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5152 case-independent, so other case variants are also recognized). Apparently
5153 some systems use these upper case variants.
5155 25. If more than two messages were waiting for the same host, and a transport
5156 filter was specified for the transport, Exim sent two messages over the
5157 same TCP/IP connection, and then failed with "socket operation on non-
5158 socket" when it tried to send the third.
5160 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5162 27. The extern definition of crypt16() in expand.c was not being excluded when
5163 the OS had its own crypt16() function.
5165 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5166 as a preferred synonym for return_size_limit, both as an option and as an
5169 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5171 30. Changed the default configuration ACL to relax the local part checking rule
5172 for addresses that are not in any local domains. For these addresses,
5173 slashes and pipe symbols are allowed within local parts, but the sequence
5174 /../ is explicitly forbidden.
5176 31. SPA server authentication was not clearing the challenge buffer before
5179 32. log_message in a "warn" ACL statement was writing to the reject log as
5180 well as to the main log, which contradicts the documentation and doesn't
5181 seem right (because no rejection is happening). So I have stopped it.
5183 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5184 However, I am unable to do any testing of this.
5186 34. Fixed an infelicity in the appendfile transport. When checking directories
5187 for a mailbox, to see if any needed to be created, it was accidentally
5188 using path names with one or more superfluous leading slashes; tracing
5189 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5191 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5192 contents are added to the log line that is written for every discarded
5193 recipient. (Previously a log_message setting was ignored.)
5195 36. The ${quote: operator now quotes the string if it is empty.
5197 37. The install script runs exim in order to find its version number. If for
5198 some reason other than non-existence or emptiness, which it checks, it
5199 could not run './exim', it was installing it with an empty version number,
5200 i.e. as "exim-". This error state is now caught, and the installation is
5203 38. An argument was missing from the function that creates an error message
5204 when Exim fails to connect to the socket for saslauthd authentication.
5205 This could cause Exim to crash, or give a corrupted message.
5207 39. Added isip, isip4, and isip6 to ${if conditions.
5209 40. The ACL variables $acl_xx are now saved with the message, and can be
5210 accessed later in routers, transports, and filters.
5212 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5213 strings in the file are not string-expanded.
5215 42. If a MAIL command specified a SIZE value that was too large to fit into an
5216 int variable, the check against message_size_limit failed. Such values are
5217 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5218 day this will have to be increased, but I don't think I want to be around
5219 when emails are that large.
5226 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5227 iconv() is not standard in FreeBSD.
5229 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5230 IPv6 enabled. The observed symptom was a segmentation fault on return from
5231 the function os_common_find_running_interfaces() in src/os.c.
5233 3. In the check_special_case() function in daemon.c I had used "errno" as an
5234 argument name, which causes warnings on some systems. This was basically a
5235 typo, since it was named "eno" in the comments!
5237 4. The code that waits for the clock to tick (at a resolution of some fraction
5238 of a second) so as to ensure message-id uniqueness was always waiting for
5239 at least one whole tick, when it could have waited for less. [This is
5240 almost certainly not relevant at current processor speeds, where it is
5241 unlikely to ever wait at all. But we try to future-proof.]
5243 5. The function that sleeps for a time interval that includes fractions of a
5244 second contained a race. It did not block SIGALRM between setting the
5245 timer, and suspending (a couple of lines later). If the interval was short
5246 and the sigsuspend() was delayed until after it had expired, the suspension
5247 never ended. On busy systems this could lead to processes getting stuck for
5250 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5251 process, before it forks any delivery processes. The open lookup caching
5252 mechanism meant that the open file or database connection was passed into
5253 the delivery process. The problem was that delivery processes always tidy
5254 up cached lookup data. This could cause a problem for the next delivery
5255 process started by the queue runner, because the external queue runner
5256 process does not know about the closure. So the next delivery process
5257 still has data in the lookup cache. In the case of a file lookup, there was
5258 no problem because closing a file descriptor in a subprocess doesn't affect
5259 the parent. However, if the lookup was caching a connection to a database,
5260 the connection was closed, and the second delivery process was likely to
5261 see errors such as "PGSQL: query failed: server closed the connection
5262 unexpectedly". The problem has been fixed by closing all cached lookups
5263 in a queue runner before running a delivery process.
5265 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5266 seem to have the "const" qualifier which it has on other OS. I've
5269 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5270 *of the same type* (client or server) with the same public name that an
5271 error should be diagnosed.
5273 9. When Exim looked up a host name for an IP address, but failed to find the
5274 original IP address when looking up the host name (a safety check), it
5275 output the message "<ip address> does not match any IP for NULL", which was
5276 confusing, to say the least. The bug was that the host name should have
5277 appeared instead of "NULL".
5279 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5280 user that is built into the binary, and the -C or -D options is used, root
5281 privilege is dropped before the configuration file is read. In addition,
5282 logging is switched to stderr instead of the normal log files. If the
5283 configuration then re-defines the Exim user, the unprivileged environment
5284 is probably not what is expected, so Exim logs a panic warning message (but
5287 However, if deliver_drop_privilege is set, the unprivileged state may well
5288 be exactly what is intended, so the warning has been cut out in that case,
5289 and Exim is allowed to try to write to its normal log files.
5295 1. smtp_return_error_details was not giving details for temporary sender
5296 or receiver verification errors.
5298 2. Diagnose a configuration error if two authenticators have the same public
5301 3. Exim used not to create the message log file for a message until the first
5302 delivery attempt. This could be confusing when incoming messages were held
5303 for policy or load reasons. The message log file is now created at the time
5304 the message is received, and an initial "Received" line is written to it.
5306 4. The automatically generated man page for command line options had a minor
5307 bug that caused no ill effects; however, a more serious problem was that
5308 the procedure for building the man page automatically didn't always
5309 operate. Consequently, release 4.20 contains an out-of-date version. This
5310 shouldn't happen again.
5312 5. When building Exim with embedded Perl support, the script that builds the
5313 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5314 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5316 6. The freeze_tell option was not being used for messages that were frozen on
5317 arrival, either by an ACL or by local_scan().
5319 7. Added the smtp_incomplete_transaction log selector.
5321 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5322 was accepting AUTH without a new EHLO.
5324 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5325 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5328 10. Logging of TCP/IP connections (when configured) now happens in the main
5329 daemon process instead of the child process, so that the TCP/IP connection
5330 count is more accurate (but it can never be perfect).
5332 11. The use of "drop" in a nested ACL was not being handled correctly in the
5333 outer ACL. Now, if condition failure induced by the nested "drop" causes
5334 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5335 or "require"), the connection is dropped.
5337 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5338 that yield "discard" can now be used with an "accept" or a "discard" verb,
5339 but an error is generated for any others (because I can't see a useful way
5340 to define what should happen).
5342 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5343 are now processed in the same way as lines in the Exim configuration file.
5344 In particular, continuation lines are supported.
5346 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5348 15. Added -ti meaning -t -i.
5350 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5351 domains, and warn by logging if others are found.
5353 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5354 returned from GIFCONF when Exim is trying to find the list of interfaces on
5355 a host. The code in os.c has been modified to copy each ifreq to an aligned
5356 structure in all cases.
5358 Also, in some cases, the returned ifreq's were being copied to a 'struct
5359 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5360 means the last couple of bytes of an IPv6 address could be chopped if the
5361 ifreq contained only a normal sockaddr (14 bytes storage).
5363 18. Named domain lists were not supported in the hosts_treat_as_local option.
5364 An entry such as +xxxx was not recognized, and was treated as a literal
5367 19. Ensure that header lines added by a DATA ACL are included in the reject log
5368 if the ACL subsequently rejects the message.
5370 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5371 MD5 (which is deprecated).
5373 21. When testing a filter file using -bf, Exim was writing a message when it
5374 took the sender from a "From " line in the message, but it was not doing so
5375 when it took $return_path from a Return-Path: header line. It now does.
5377 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5378 with a valid header line field name (a series of printing characters
5379 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5381 23. Changed "disc" in the source to "disk" to conform to the documentation and
5382 the book and for uniformity.
5384 24. Ignore Sendmail's -Ooption=value command line item.
5386 25. When execve() failed while trying to run a command in a pipe transport,
5387 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5388 could be confused with a return value of 69 from the command itself. This
5389 has been changed to 127, the value the shell returns if it is asked to run
5390 a non-existent command. The wording for the related log line suggests a
5391 non-existent command as the problem.
5393 26. If received_header_text expands to an empty string, do not add a Received:
5394 header line to the message. (Well, it adds a token one on the spool, but
5395 marks it "old" so that it doesn't get used or transmitted.)
5397 27. Installed eximstats 1.28 (addition of -nt option).
5399 28. There was no check for failure on the call to getsockname() in the daemon
5400 code. This can fail if there is a shortage of resources on the system, with
5401 ENOMEM, for example. A temporary error is now given on failure.
5403 29. Contrary to the C standard, it seems that in some environments, the
5404 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5405 program. Exim now does this explicitly; it affects the formatting of
5406 timestamps using strftime().
5408 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5409 complaints. I've now initialized all the variables, to avoid this.
5411 32. Header lines added by a system filter were not being "seen" during
5412 transport-time rewrites.
5414 33. The info_callback() function passed to OpenSSL is set up with type void
5415 (*)(SSL *, int, int), as described somewhere. However, when calling the
5416 function (actually a macro) that sets it up, the type void(*)() is
5417 expected. I've put in a cast to prevent warnings from picky compilers.
5419 34. If a DNS black list lookup found a CNAME record, but there were no A
5420 records associated with the domain it pointed at, Exim crashed.
5422 35. If a DNS black list lookup returned more than one A record, Exim ignored
5423 all but the first. It now scans all returned addresses if a particular IP
5424 value is being sought. In this situation, the contents of the
5425 $dnslist_value variable are a list of all the addresses, separated by a
5428 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5429 to accept a host name and all its aliases if the forward lookup for any of
5430 them yielded the IP address of the incoming connection. Now it accepts only
5431 those names whose forward lookup yields the correct IP address. Any other
5432 names are discarded. This closes a loophole whereby a rogue DNS
5433 administrator could create reverse DNS records to break through a
5434 wildcarded host restriction in an ACL.
5436 37. If a user filter or a system filter that ran in a subprocess used any of
5437 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5438 the wrong values were passed to the pipe command ($thisaddress had the
5439 value of $0, $0 had the value of $1, etc). This bug was introduced by
5440 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5442 38. Improved the line breaking for long SMTP error messages from ACLs.
5443 Previously, if there was no break point between 40 and 75 characters, Exim
5444 left the rest of the message alone. Two changes have been made: (a) I've
5445 reduced the minimum length to 35 characters; (b) if it can't find a break
5446 point between 35 and 75 characters, it looks ahead and uses the first one
5447 that it finds. This may give the occasional overlong line, but at least the
5448 remaining text gets split now.
5450 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5451 file descriptors might be low, and that setting 1000 would always raise it.
5452 It turns out that in some environments, the limit is already over 1000 and
5453 that lowering it causes trouble. So now Exim takes care not to decrease it.
5455 40. When delivering a message, the value of $return_path is set to $sender_
5456 address at the start of routing (routers may change the value). By an
5457 oversight, this default was not being set up when an address was tested by
5458 -bt or -bv, which affected the outcome if any router or filter referred to
5461 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5462 log only when "message" or "log_message" are set. However, if one of the
5463 conditions was an address verification, or a call to a nested ACL, the
5464 messages generated by the underlying test were being passed through. This
5465 no longer happens. The underlying message is available in $acl_verify_
5466 message for both "message" and "log_message" expansions, so it can be
5467 passed through if needed.
5469 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5470 new expansion $bh_ to give the encoded byte string without charset
5471 translation. Translation happens only if iconv() is available; HAVE_ICONV
5472 indicates this at build time. HEADERS_CHARSET gives the charset to
5473 translate to; headers_charset can change it in the configuration, and
5474 "headers charset" can change it in an individual filter file.
5476 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5477 that creates RFC 2047 encoded "words" labels them as that charset instead
5478 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5479 expansion operator; (ii) when Exim creates a From: line for a local
5480 message; (iii) when a header line is rewritten to include a "phrase" part.
5482 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5483 buggy, causing it to skip the first lines of messages whose message ID
5484 ended in 'D'. This would not have bitten before Exim release 4.14, because
5485 message IDs were unlikely to end in 'D' before then. The effect was to have
5486 incorrect size information for certain domains.
5488 45. #include "config.h" was missing at the start of the crypt16.c module. This
5489 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5492 46. If there was a timeout during a "random" callout check, Exim treated it as
5493 a failure of the random address, and carried on sending RSET and the real
5494 address. If the delay was just some slowness somewhere, the response to the
5495 original RCPT would be taken as a response to RSET and so on, causing
5496 mayhem of various kinds.
5498 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5499 when I implemented it. It didn't allow for the fact that some option values
5500 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5501 the right test for positive values.
5503 48. Domain names in DNS records are case-independent. Exim always looks them up
5504 in lower case. Some resolvers return domain names in exactly the case they
5505 appear in the zone file, that is, they may contain uppercase letters. Not
5506 all resolvers do this - some return always lower case. Exim was treating a
5507 change of case by a resolver as a change of domain, similar to a widening
5508 of a domain abbreviation. This triggered its re-routing code and so it was
5509 trying to route what was effectively the same domain again. This normally
5510 caused routing to fail (because the router wouldn't handle the domain
5511 twice). Now Exim checks for this case specially, and just changes the
5512 casing of the domain that it ultimately uses when it transmits the message
5515 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5518 50. If a filter generated a file delivery with a non-absolute name (possible if
5519 no home directory exists for the router), the forbid_file option was not
5522 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5523 the existing equality matching.
5525 52. Exim was using ints instead of ino_t variables in some places where it was
5526 dealing with inode numbers.
5528 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5529 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5530 called TMPDIR, and if it finds it is different, it changes its value.
5532 54. The smtp_printf() function is now made available to local_scan() so
5533 additional output lines can be written before returning. There is also an
5534 smtp_fflush() function to enable the detection of a dropped connection.
5535 The variables smtp_input and smtp_batched_input are exported to
5538 55. Changed the default runtime configuration: the message "Unknown user"
5539 has been removed from the ACL, and instead placed on the localuser router,
5540 using the cannot_route_message feature. This means that any verification
5541 failures that generate their own messages won't get overridden. Similarly,
5542 the "Unrouteable address" message that was in the ACL for unverifiable
5543 relay addresses has also been removed.
5545 56. Added hosts_avoid_esmtp to the smtp transport.
5547 57. The exicyclog script was not checking for the esoteric option
5548 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5549 will work only if exicyclog is run under the appropriate euid.
5551 58. Following a discussion on the list, the rules by which Exim recognises line
5552 endings on incoming messages have been changed. The -dropcr and drop_cr
5553 options are now no-ops, retained only for backwards compatibility. The
5554 following line terminators are recognized: LF CRLF CR. However, special
5555 processing applies to CR:
5557 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5558 nor a local message in the state where . is a terminator.
5560 (ii) If a bare CR is encountered in a header line, an extra space is added
5561 after the line terminator so as not to end the header. The reasoning
5562 behind this is that bare CRs in header lines are most likely either
5563 to be mistakes, or people trying to play silly games.
5565 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5566 was being incorrectly given as 18 bytes larger than it should have been.
5567 This is a VOB (very old bug).
5569 60. This may never have affected anything current, but just in case it has:
5570 When the local host is found other than at the start of a list of hosts,
5571 the local host, those with the same MX, and any that follow, are discarded.
5572 When the list in question was part of a longer list of hosts, the following
5573 hosts (not currently being processed) were also being discarded. This no
5574 longer happens. I'm not sure if this situation could ever has previously
5577 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5580 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5581 header. This is something that is recommended in a new Internet Draft, and
5582 is something that is documented as being done by Sendmail. There are two
5583 possible values. For messages generated by the autoreply transport, Exim
5586 Auto-Submitted: auto-replied
5588 whereas for all other generated messages (e.g. bounces) it adds
5590 Auto-Submitted: auto-generated
5592 63. The "personal" condition in filters now includes a test for the
5593 Auto-Submitted: header. If it contains the string "auto-" the message it
5594 not considered personal.
5596 64. Added rcpt_include_affixes as a generic transport option.
5598 65. Added queue_only_override (default true).
5600 66. Added the syslog_duplication option.
5602 67. If what should have been the first header line of a message consisted of
5603 a space followed by a colon, Exim was mis-interpreting it as a header line.
5604 It isn't of course - it is syntactically invalid and should therefore be
5605 treated as the start of the message body. The misbehaviour could have
5606 caused a number of strange effects, including loss of data in subsequent
5607 header lines, and spool format errors.
5609 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5610 client host had authenticated. This control can now be exercised by an ACL
5611 for more flexibility.
5613 69. By default, callouts do not happen when testing with -bh. There is now a
5614 variant, -bhc, which does actually run the callout code, including
5615 consulting and updating the callout cache.
5617 70. Added support for saslauthd authentication, courtesy of Alexander
5620 71. If statvfs() failed on the spool or log directories while checking their
5621 size for availability, Exim confusingly gave the error "space shortage".
5622 Furthermore, in debugging mode it crashed with a floating point exception.
5623 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5624 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5625 serious problem, Exim now writes to the main and panic logs when this
5626 happens, with details of the failure. It then refuses to accept the
5627 incoming message, giving the message "spool directory problem" or "log
5628 directory problem" with a 421 code for SMTP messages.
5630 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5631 0, 1, and 2 exist, because some OS complain for execs without them (see
5632 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5633 descriptors. However, the code omitted to check that the open succeeded,
5634 causing mysterious errors if for some reason the permissions on /dev/null
5635 got screwed. Now Exim writes a message to the main and panic logs, and
5636 bombs out if it can't open /dev/null.
5638 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5639 interact so that it is all more flexible. It is supposed to remain
5640 backwards compatible. Also added extra_local_interfaces.
5642 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5643 to bomb out with an assertion failure - to the client this appears as a
5644 connection drop. This problem occurs in the part of the code that was taken
5645 from the Samba project. Fortunately, the assertion is in a very simple
5646 function, so I have fixed this by reproducing the function inline in the
5647 one place where it is called, and arranging for authentication to fail
5648 instead of killing the process with assert().
5650 75. The SPA client code was not working when the server requested OEM rather
5651 than Unicode encoding.
5653 76. Added code to make require_files with a specific uid setting more usable in
5654 the case where statting the file as root fails - usually a non-root-mounted
5655 NFS file system. When this happens and the failure is EACCES, Exim now
5656 forks a subprocess and does the per-uid checking as the relevant uid.
5658 77. Added process_log_path.
5660 78. If log_file_path was not explicitly set, a setting of check_log_space or
5661 check_log_inodes was ignored.
5663 79. If a space check for the spool or log partitions fails, the incident is now
5664 logged. Of course, in the latter case the data may get lost...
5666 80. Added the %p formatting code to string_format() so that it can be used to
5667 print addresses in debug_print(). Adjusted all the address printing in the
5668 debugging in store.c to use %p rather than %d.
5670 81. There was a concern that a line of code in smtp_in.c could overflow a
5671 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5672 initially expressed, the concern was not well-founded, because trailing
5673 spaces are removed early. However, if the trailing spaces were followed by
5674 a NULL, they did not get removed, so the overflow was possible. Two fixes
5677 (a) I re-wrote the offending code in a cleaner fashion.
5678 (b) If an incoming SMTP command contains a NULL character, it is rejected
5681 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5682 runs initgroups(), so that if the Exim user is in any additional groups,
5683 they will be used during message reception.
5689 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob