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>
38 PP/01 Handle short writes when writing local log-files.
39 In practice, only affects FreeBSD (8 onwards).
40 Bugzilla 1053, with thanks to Dmitry Isaikin.
42 NM/01 Bugzilla 949 - Documentation tweak
44 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
47 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
49 PP/02 Implemented gsasl authenticator.
51 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
53 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
54 `pkg-config foo` for cflags/libs.
56 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
57 with rest of GSASL and with heimdal_gssapi.
59 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
60 `pkg-config foo` for cflags/libs for the TLS implementation.
62 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
63 properties get this fed in as external SSF. A number of robustness
64 and debugging improvements to the cyrus_sasl authenticator.
66 PP/08 cyrus_sasl server now expands the server_realm option.
68 PP/09 Bugzilla 1214 - Log authentication information in reject log.
69 Patch by Jeremy Harris.
71 PP/10 Added dbmjz lookup type.
73 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
75 PP/12 MAIL args handles TAB as well as SP, for better interop with
76 non-compliant senders.
77 Analysis and variant patch by Todd Lyons.
79 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
80 Bug report from Lars Müller <lars@samba.org> (via SUSE),
81 Patch from Dirk Mueller <dmueller@suse.com>
83 PP/13 tls_peerdn now print-escaped for spool files.
84 Observed some $tls_peerdn in wild which contained \n, which resulted
85 in spool file corruption.
87 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
88 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
89 or write after TLS renegotiation, which otherwise led to messages
92 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
93 as a tracking header (ie: a signed header comes before the signature).
94 Patch from Wolfgang Breyha.
96 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
97 comma-sep list; embedded commas doubled.
99 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
101 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
103 Report and patch from Dmitry Banschikov.
105 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
106 Removed SSL_clear() after SSL_new() which led to protocol negotiation
107 failures. We appear to now support TLS1.1+ with Exim.
109 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
110 lets Exim select keys and certificates based upon TLS SNI from client.
111 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
112 before an outbound SMTP session. New log_selector, +tls_sni.
114 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
115 NULL dereference. Report and patch from Alun Jones.
117 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
118 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
119 Not seeing resolver debug output on NetBSD, but suspect this is a
120 resolver implementation change.
122 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
123 Left warnings. Added "eximon gdb" invocation mode.
125 PP/21 Defaulting "accept_8bitmime" to true, not false.
127 PP/22 Added -bw for inetd wait mode support.
129 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
130 locate the relevant includes and libraries. Made this the default.
132 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
133 Bugzilla 1246, report and most of solution from Tomasz Kusy.
135 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
136 This may cause build issues on older platforms.
138 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
139 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
140 gnutls_require_mac & gnutls_require_protocols (no longer supported).
141 Added SNI support via GnuTLS too.
142 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
144 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
146 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
147 Applied second patch from Janne, implementing suggestion to default
148 multiple-strings-in-record handling to match SPF spec.
150 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
152 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
153 read-only, out of scope).
154 Patch from Wolfgang Breyha, report from Stuart Northfield.
156 PP/29 Fix three issues highlighted by clang analyser static analysis.
157 Only crash-plausible issue would require the Cambridge-specific
158 iplookup router and a misconfiguration.
159 Report from Marcin Mirosław.
161 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
163 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
164 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
165 As part of this, removing so much warning spew let me fix some minor
166 real issues in debug logging.
168 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
169 assignment on my part. Fixed.
171 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
172 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
173 Janne Snabb (who went above and beyond: thank you).
175 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
176 string otherwise requires a connection and a bunch more work and it's
177 relatively easy to get wrong. Should also expose TLS library linkage
180 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
181 64-bit ${eval} (JH/03).
183 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
184 GNU libc to support some of the 64-bit stuff, should not lead to
185 conflicts. Defined before os.h is pulled in, so if a given platform
186 needs to override this, it can.
188 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
189 protection layer was required, which is not implemented.
190 Bugzilla 1254, patch from Wolfgang Breyha.
192 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
193 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
194 tls_dhparam take prime identifiers. Also unbreak combination of
195 OpenSSL+DH_params+TLSSNI.
197 PP/39 Disable SSLv2 by default in OpenSSL support.
203 PP/01 Solaris build fix for Oracle's LDAP libraries.
204 Bugzilla 1109, patch from Stephen Usher.
206 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
208 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
211 TF/02 Fix a couple more cases where we did not log the error message
212 when unlink() failed. See also change 4.74-TF/03.
214 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
215 lock up or crash if it happened to be inside a call to libc when it
216 got a SIGUSR1 from exiwhat.
218 The SIGUSR1 handler appends the current process status to the process
219 log which is later printed by exiwhat. It used to use the general
220 purpose logging code to do this, but several functions it calls are
221 not safe for signals.
223 The new output code in the SIGUSR1 handler is specific to the process
224 log, and simple enough that it's easy to inspect for signal safety.
225 Removing some special cases also simplifies the general logging code.
226 Removing the spurious timestamps from the process log simplifies
229 TF/04 Improved ratelimit ACL condition.
231 The /noupdate option has been deprecated in favour of /readonly which
232 has clearer semantics. The /leaky, /strict, and /readonly update modes
233 are mutually exclusive. The update mode is no longer included in the
234 database key; it just determines when the database is updated. (This
235 means that when you upgrde Exim will forget old rate measurements.)
237 Exim now checks that the per_* options are used with an update mode that
238 makes sense for the current ACL. For example, when Exim is processing a
239 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
240 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
241 must specify per_mail/readonly. If you omit the update mode it defaults to
242 /leaky where that makes sense (as before) or /readonly where required.
244 The /noupdate option is now undocumented but still supported for
245 backwards compatibility. It is equivalent to /readonly except that in
246 ACLs where /readonly is required you may specify /leaky/noupdate or
247 /strict/noupdate which are treated the same as /readonly.
249 A useful new feature is the /count= option. This is a generalization
250 of the per_byte option, so that you can measure the throughput of other
251 aggregate values. For example, the per_byte option is now equivalent
252 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
254 The per_rcpt option has been generalized using the /count= mechanism
255 (though it's more complicated than the per_byte equivalence). When it is
256 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
257 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
258 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
259 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
260 Note that using per_rcpt with a non-readonly update mode in more than
261 one ACL will cause the recipients to be double-counted. (The per_mail
262 and per_byte options don't have this problem.)
264 The handling of very low rates has changed slightly. If the computed rate
265 is less than the event's count (usually one) then this event is the first
266 after a long gap. In this case the rate is set to the same as this event's
267 count, so that the first message of a spam run is counted properly.
269 The major new feature is a mechanism for counting the rate of unique
270 events. The new per_addr option counts the number of different
271 recipients that someone has sent messages to in the last time period. It
272 behaves like per_rcpt if all the recipient addresses are different, but
273 duplicate recipient addresses do not increase the measured rate. Like
274 the /count= option this is a general mechanism, so the per_addr option
275 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
276 example, measure the rate that a client uses different sender addresses
277 with the options per_mail/unique=$sender_address. There are further
278 details in the main documentation.
280 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
282 TF/06 Removed a few PCRE remnants.
284 TF/07 Automatically extract Exim's version number from tags in the git
285 repository when doing development or release builds.
287 PP/02 Raise smtp_cmd_buffer_size to 16kB.
288 Bugzilla 879. Patch from Paul Fisher.
290 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
291 Heavily based on revision 40f9a89a from Simon Arlott's tree.
294 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
296 PP/05 Variable $av_failed, true if the AV scanner deferred.
297 Bugzilla 1078. Patch from John Horne.
299 PP/06 Stop make process more reliably on build failure.
300 Bugzilla 1087. Patch from Heiko Schlittermann.
302 PP/07 Make maildir_use_size_file an _expandable_ boolean.
303 Bugzilla 1089. Patch from Heiko Schlittermann.
305 PP/08 Handle ${run} returning more data than OS pipe buffer size.
306 Bugzilla 1131. Patch from Holger Weiß.
308 PP/09 Handle IPv6 addresses with SPF.
309 Bugzilla 860. Patch from Wolfgang Breyha.
311 PP/10 GnuTLS: support TLS 1.2 & 1.1.
313 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
316 PP/11 match_* no longer expand right-hand-side by default.
317 New compile-time build option, EXPAND_LISTMATCH_RHS.
318 New expansion conditions, "inlist", "inlisti".
320 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
322 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
324 PP/14 fix log_write() format string regression from TF/03.
325 Bugzilla 1152. Patch from Dmitry Isaikin.
331 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
333 PP/02 Harmonised TLS library version reporting; only show if debugging.
334 Layout now matches that introduced for other libraries in 4.74 PP/03.
336 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
338 PP/04 New "dns_use_edns0" global option.
340 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
343 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
344 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
346 TK/01 Updated PolarSSL code to 0.14.2.
347 Bugzilla 1097. Patch from Andreas Metzler.
349 PP/07 Catch divide-by-zero in ${eval:...}.
352 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
355 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
356 format-string attack -- SECURITY: remote arbitrary code execution.
358 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
359 time unintentionally subject to list matching rules, letting the header
360 cause arbitrary Exim lookups (of items which can occur in lists, *not*
361 arbitrary string expansion). This allowed for information disclosure.
363 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
364 INT_MIN/-1 -- value coerced to INT_MAX.
370 NM/01 Workround for PCRE version dependency in version reporting
373 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
374 This fixes portability to compilers other than gcc, notably
375 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
377 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
378 makefiles for portability to HP-UX and POSIX correctness.
380 PP/01 Permit LOOKUP_foo enabling on the make command-line.
381 Also via indented variable definition in the Makefile.
382 (Debugging by Oliver Heesakkers).
384 PP/02 Restore caching of spamd results with expanded spamd_address.
385 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
387 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
388 Improves build reliability. Fix from: Frank Elsner
390 NM/02 Fix wide character breakage in the rfc2047 coding
391 Fixes bug 1064. Patch from Andrey N. Oktyabrski
393 NM/03 Allow underscore in dnslist lookups
394 Fixes bug 1026. Patch from Graeme Fowler
396 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
397 Code patches from Adam Ciarcinski of NetBSD.
399 NM/04 Fixed exiqgrep to cope with mailq missing size issue
402 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
403 is logged, to avoid truncation. Patch from John Horne.
405 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
406 Patch from Jakob Hirsch.
408 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
409 SQL string expansion failure details.
410 Patch from Andrey Oktyabrski.
412 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
413 Patch from Simon Arlott.
415 PP/09 New lookups functionality failed to compile on old gcc which rejects
416 extern declarations in function scope.
417 Patch from Oliver Fleischmann
419 PP/10 Use sig_atomic_t for flags set from signal handlers.
420 Check getgroups() return and improve debugging.
421 Fixed developed for diagnosis in bug 927 (which turned out to be
424 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
425 Patch from Mark Zealey.
427 PP/12 Bugzilla 1056: Improved spamd server selection.
428 Patch from Mark Zealey.
430 PP/13 Bugzilla 1086: Deal with maildir quota file races.
431 Based on patch from Heiko Schlittermann.
433 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
434 Patch from Uwe Doering, sign-off by Michael Haardt.
436 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
437 variable declaration deep within a block. Bug and patch from
440 PP/15 lookups-Makefile IRIX compatibilty coercion.
442 PP/16 Make DISABLE_DKIM build knob functional.
444 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
445 Patch by Simon Arlott
447 TF/03 Fix valgrind.h portability to C89 compilers that do not support
448 variable argument macros. Our copy now differs from upstream.
454 TF/01 Failure to get a lock on a hints database can have serious
455 consequences so log it to the panic log.
457 TF/02 Log LMTP confirmation messages in the same way as SMTP,
458 controlled using the smtp_confirmation log selector.
460 TF/03 Include the error message when we fail to unlink a spool file.
462 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
463 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
464 for maintaining out-of-tree patches for some time.
466 PP/01 Bugzilla 139: Documentation and portability issues.
467 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
468 Handle per-OS dynamic-module compilation flags.
470 PP/02 Let /dev/null have normal permissions.
471 The 4.73 fixes were a little too stringent and complained about the
472 permissions on /dev/null. Exempt it from some checks.
473 Reported by Andreas M. Kirchwitz.
475 PP/03 Report version information for many libraries, including
476 Exim version information for dynamically loaded libraries. Created
477 version.h, now support a version extension string for distributors
478 who patch heavily. Dynamic module ABI change.
480 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
481 privilege escalation vulnerability whereby the Exim run-time user
482 can cause root to append content of the attacker's choosing to
485 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
488 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
489 If dropping privileges for untrusted macros, we disabled normal logging
490 on the basis that it would fail; for the Exim run-time user, this is not
491 the case, and it resulted in successful deliveries going unlogged.
492 Fixed. Reported by Andreas Metzler.
498 PP/01 Date: & Message-Id: revert to normally being appended to a message,
499 only prepend for the Resent-* case. Fixes regression introduced in
500 Exim 4.70 by NM/22 for Bugzilla 607.
502 PP/02 Include check_rfc2047_length in configure.default because we're seeing
503 increasing numbers of administrators be bitten by this.
505 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
507 PP/03 Bugzilla 994: added openssl_options main configuration option.
509 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
511 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
513 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
515 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
516 without a peer certificate, leading to a segfault because of an
517 assumption that peers always have certificates. Be a little more
518 paranoid. Problem reported by Martin Tscholak.
520 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
521 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
522 NB: ClamAV planning to remove STREAM in "middle of 2010".
523 CL also introduces -bmalware, various -d+acl logging additions and
524 more caution in buffer sizes.
526 PP/09 Implemented reverse_ip expansion operator.
528 PP/10 Bugzilla 937: provide a "debug" ACL control.
530 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
532 PP/12 Bugzilla 973: Implement --version.
534 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
536 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
538 PP/15 Bugzilla 816: support multiple condition rules on Routers.
540 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
541 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
542 ignore trailing whitespace.
544 JJ/02 prevent non-panic DKIM error from being sent to paniclog
546 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
549 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
550 Notification from Dr Andrew Aitchison.
552 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
553 ExtendedDetectionInfo response format.
554 Notification from John Horne.
556 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
559 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
560 XSL and documented dependency on system catalogs, with examples of how
563 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
566 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
567 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
568 configuration file which is writeable by the Exim user or group.
570 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
571 of configuration files to cover files specified with the -C option if
572 they are going to be used with root privileges, not just the default
575 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
576 option (effectively making it always true).
578 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
579 files to be used while preserving root privileges.
581 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
582 that rogue child processes cannot use them.
584 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
585 run-time user, instead of root.
587 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
588 Exim run-time user without dropping privileges.
590 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
591 result string, instead of calling string_vformat() twice with the same
594 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
595 for other users. Others should always drop root privileges if they use
596 -C on the command line, even for a whitelisted configure file.
598 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
600 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
606 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
607 $data_path, and $header_path variables; fixed documentation bugs and
610 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
611 exipick to access non-standard spools, including the "frozen" queue
614 NM/01 Bugzilla 965: Support mysql stored procedures.
615 Patch from Alain Williams
617 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
619 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
620 Patch from Andreas Metzler
622 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
623 Patch from Kirill Miazine
625 NM/05 Bugzilla 671: Added umask to procmail example.
627 JJ/03 installed exipick 20100323.0, fixing doc bug
629 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
630 directory. Notification and patch from Dan Rosenberg.
632 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
634 TK/02 Improve log output when DKIM signing operation fails.
636 MH/01 Treat the transport option dkim_domain as a colon separated
637 list, not as a single string, and sign the message with each element,
638 omitting multiple occurences of the same signer.
640 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
641 Bugzilla 985, 986. Patch by Simon Arlott
643 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
644 Patch by Simon Arlott
646 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
647 MBX locking. Notification from Dan Rosenberg.
653 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
655 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
657 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
659 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
661 NM/04 Bugzilla 915: Flag broken perl installation during build.
667 TK/01 Added patch by Johannes Berg that expands the main option
668 "spamd_address" if it starts with a dollar sign.
670 TK/02 Write list of recipients to X-Envelope-Sender header when building
671 the mbox-format spool file for content scanning (suggested by Jakob
674 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
675 (http://www.dcc-servers.net/) support via dccifd. Activated by
676 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
678 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
679 by Mark Daniel Reidel <mr@df.eu>.
681 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
682 When building exim an external PCRE library is now needed -
683 PCRE is a system library on the majority of modern systems.
684 See entry on PCRE_LIBS in EDITME file.
686 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
687 conversation. Added nologin parameter to request.
688 Patch contributed by Kirill Miazine.
690 TF/01 Do not log submission mode rewrites if they do not change the address.
692 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
694 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
695 log files in place. Contributed by Roberto Lima.
697 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
699 TF/03 Bugzilla 615: When checking the local_parts router precondition
700 after a local_part_suffix or local_part_prefix option, Exim now
701 does not use the address's named list lookup cache, since this
702 contains cached lookups for the whole local part.
704 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
705 Robert Millan. Documentation is in experimental-spec.txt.
707 TF/04 Bugzilla 668: Fix parallel build (make -j).
709 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
711 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
712 Patch provided by Jan Srzednicki.
714 TF/05 Leading white space used to be stripped from $spam_report which
715 wrecked the formatting. Now it is preserved.
717 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
718 that they are available at delivery time.
720 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
722 TF/08 TLS error reporting now respects the incoming_interface and
723 incoming_port log selectors.
725 TF/09 Produce a more useful error message if an SMTP transport's hosts
726 setting expands to an empty string.
728 NM/06 Bugzilla 744: EXPN did not work under TLS.
729 Patch provided by Phil Pennock.
731 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
732 Patch provided by Richard Godbee.
734 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
735 acl_smtp_notquit, added index entry.
737 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
738 Patch provided by Eugene Bujak.
740 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
741 accept(). Patch provided by Maxim Dounin.
743 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
744 Patch provided by Phil Pennock.
746 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
748 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
749 Patch provided by Brad "anomie" Jorsch.
751 NM/14 Bugzilla 622: Added timeout setting to transport filter.
752 Patch provided by Dean Brooks.
754 TK/05 Add native DKIM support (does not depend on external libraries).
756 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
757 Patch provided by Graeme Fowler.
759 NM/16 Bugzilla 851: Documentation example syntax fix.
761 NM/17 Changed NOTICE file to remove references to embedded PCRE.
763 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
766 NM/19 Bugzilla 745: TLS version reporting.
767 Patch provided by Phil Pennock.
769 NM/20 Bugzilla 167: bool: condition support.
770 Patch provided by Phil Pennock.
772 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
773 clients. Patch provided by Phil Pennock.
775 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
776 Patch provided by Brad "anomie" Jorsch.
778 NM/23 Bugzilla 687: Fix misparses in eximstats.
779 Patch provided by Heiko Schlittermann.
781 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
782 Patch provided by Heiko Schlittermann.
784 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
785 plus update to original patch.
787 NM/26 Bugzilla 799: Documentation correction for ratelimit.
789 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
790 Patch provided by David Brownlee.
792 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
794 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
796 NM/30 Bugzilla 888: TLS documentation bugfixes.
798 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
800 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
801 Unlike the original bugzilla I have changed all shell scripts in src tree.
803 NM/33 Bugzilla 898: Transport filter timeout fix.
804 Patch by Todd Rinaldo.
806 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
807 Patch by Serge Demonchaux.
809 NM/35 Bugzilla 39: Base64 decode bug fixes.
810 Patch by Jakob Hirsch.
812 NM/36 Bugzilla 909: Correct connect() call in dcc code.
814 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
816 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
818 NM/39 Bugzilla 911: Fixed MakeLinks build script.
824 TK/01 Add preliminary DKIM support. Currently requires a forked version of
825 ALT-N's libdkim that I have put here:
826 http://duncanthrax.net/exim-experimental/
828 Note to Michael Haardt: I had to rename some vars in sieve.c. They
829 were called 'true' and it seems that C99 defines that as a reserved
830 keyword to be used with 'bool' variable types. That means you could
831 not include C99-style headers which use bools without triggering
832 build errors in sieve.c.
834 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
835 as mailq or other aliases. Changed the --help handling significantly
836 to do whats expected. exim_usage() emits usage/help information.
838 SC/01 Added the -bylocaldomain option to eximstats.
840 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
842 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
844 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
850 PH/01 Another patch from the Sieve maintainer.
852 PH/02 When an IPv6 address is converted to a string for single-key lookup
853 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
854 dots are used instead of colons so that keys in lsearch files need not
855 contain colons. This was done some time before quoting was made available
856 in lsearch files. However, iplsearch files do require colons in IPv6 keys
857 (notated using the quote facility) so as to distinguish them from IPv4
858 keys. This meant that lookups for IP addresses in host lists did not work
859 for iplsearch lookups.
861 This has been fixed by arranging for IPv6 addresses to be expressed with
862 colons if the lookup type is iplsearch. This is not incompatible, because
863 previously such lookups could never work.
865 The situation is now rather anomolous, since one *can* have colons in
866 ordinary lsearch keys. However, making the change in all cases is
867 incompatible and would probably break a number of configurations.
869 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
872 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
873 conversion specification without a maximum field width, thereby enabling
874 a rogue spamd server to cause a buffer overflow. While nobody in their
875 right mind would setup Exim to query an untrusted spamd server, an
876 attacker that gains access to a server running spamd could potentially
877 exploit this vulnerability to run arbitrary code as the Exim user.
879 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
880 $primary_hostname instead of what libspf2 thinks the hosts name is.
882 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
883 a directory entry by the name of the lookup key. Previously, if a
884 symlink pointed to a non-existing file or a file in a directory that
885 Exim lacked permissions to read, a lookup for a key matching that
886 symlink would fail. Now it is enough that a matching directory entry
887 exists, symlink or not. (Bugzilla 503.)
889 PH/03 The body_linecount and body_zerocount variables are now exported in the
892 PH/04 Added the $dnslist_matched variable.
894 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
895 This means they are set thereafter only if the connection becomes
898 PH/06 Added the client_condition to authenticators so that some can be skipped
899 by clients under certain conditions.
901 PH/07 The error message for a badly-placed control=no_multiline_responses left
902 "_responses" off the end of the name.
904 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
906 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
907 (without spaces) instead of just copying the configuration text.
909 PH/10 Added the /noupdate option to the ratelimit ACL condition.
911 PH/11 Added $max_received_linelength.
913 PH/12 Added +ignore_defer and +include_defer to host lists.
915 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
916 way in which PCRE > 7.0 is built.
918 PH/14 Implemented queue_only_load_latch.
920 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
921 MAIL command. The effect was to mangle the value on 64-bit systems.
923 PH/16 Another patch from the Sieve maintainer.
925 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
927 PH/18 If a system quota error occurred while trying to create the file for
928 a maildir delivery, the message "Mailbox is full" was not appended to the
929 bounce if the delivery eventually timed out. Change 4.67/27 below applied
930 only to a quota excession during the actual writing of the file.
932 PH/19 It seems that peer DN values may contain newlines (and other non-printing
933 characters?) which causes problems in log lines. The DN values are now
934 passed through string_printing() before being added to log lines.
936 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
937 and InterBase are left for another time.)
939 PH/21 Added message_body_newlines option.
941 PH/22 Guard against possible overflow in moan_check_errorcopy().
943 PH/23 POSIX allows open() to be a macro; guard against that.
945 PH/24 If the recipient of an error message contained an @ in the local part
946 (suitably quoted, of course), incorrect values were put in $domain and
947 $local_part during the evaluation of errors_copy.
953 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
954 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
957 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
958 issue a MAIL command.
960 PH/02 In an ACL statement such as
962 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
964 if a client was not listed at all, or was listed with a value other than
965 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
966 the condition was not true (as it should be), so access was not denied.
967 The bug was that the ! inversion was incorrectly passed on to the second
968 item. This has been fixed.
970 PH/03 Added additional dnslists conditions == and =& which are different from
971 = and & when the dns lookup returns more than one IP address.
973 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
974 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
976 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
977 FSYNC, which compiles an option called disable_fsync that allows for
978 bypassing fsync(). The documentation is heavily laced with warnings.
980 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
982 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
983 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
984 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
985 including adding "make clean"; (3) Added -fPIC when compiling the test
986 dynamically loaded module, to get rid of a warning.
988 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
989 message fails, move_frozen_messages = true and ignore_bounce_errors_after
990 = 0s. The bug is otherwise harmless.
992 PH/07 There was a bug in the dovecot authenticator such that the value of
993 $auth1 could be overwritten, and so not correctly preserved, after a
994 successful authentication. This usually meant that the value preserved by
995 the server_setid option was incorrect.
997 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
999 PH/09 Installed PCRE release 7.0.
1001 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1002 run for batched SMTP input. It is now run at the start of every message
1003 in the batch. While fixing this I discovered that the process information
1004 (output by running exiwhat) was not always getting set for -bs and -bS
1005 input. This is fixed, and it now also says "batched" for BSMTP.
1007 PH/11 Added control=no_pipelining.
1009 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1010 patch, slightly modified), and move the expansion of helo_data till after
1011 the connection is made in the smtp transport (so it can use these
1014 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1016 PH/14 Added log_selector = +pid.
1018 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1020 PH/16 Add ${if forany and ${if forall.
1022 PH/17 Added dsn_from option to vary the From: line in DSNs.
1024 PH/18 Flush SMTP output before performing a callout, unless control =
1025 no_callout_flush is set.
1027 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1028 was true (the default) a successful delivery failed to delete the retry
1029 item, thus causing premature timeout of the address. The bug is now
1032 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1034 PH/21 Long custom messages for fakedefer and fakereject are now split up
1035 into multiline reponses in the same way that messages for "deny" and
1036 other ACL rejections are.
1038 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1039 with slight modification.
1041 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1042 draft, changing the syntax and factoring some duplicate code".
1044 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1045 for deliveries of the second and subsequent messages over the same SMTP
1048 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1049 ${reduce, with only minor "tidies".
1051 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1053 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1054 expansion side effects.
1056 PH/27 When a message times out after an over-quota error from an Exim-imposed
1057 quota, the bounce message says "mailbox is full". This message was not
1058 being given when it was a system quota that was exceeded. It now should
1061 MH/03 Made $recipients available in local_scan(). local_scan() already has
1062 better access to the recipient list through recipients_list[], but
1063 $recipients can be useful in postmaster-provided expansion strings.
1065 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1066 in the case of a MAIL command with additional options following the
1067 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1068 were accidentally chopped off.
1070 PH/29 SMTP synchronization checks are implemented when a command is read -
1071 there is a check that no more input is waiting when there shouldn't be
1072 any. However, for some commands, a delay in an ACL can mean that it is
1073 some time before the response is written. In this time, more input might
1074 arrive, invalidly. So now there are extra checks after an ACL has run for
1075 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1076 pipelining has not been advertised.
1078 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1080 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1081 returned in the SMTP response when smtp_return_error_details was false.
1082 This has been fixed.
1084 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1085 instead of the C I/O that was originally supplied, because problems were
1086 reported on Solaris.
1088 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1089 Exim which did not show up earlier: it was assuming that a call to
1090 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1091 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1092 was a macro that became an assignment, so it seemed to work. This has
1093 changed to a proper function call with a void return, hence the compile
1094 error. Exim's code has been fixed.
1096 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1099 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1101 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1103 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1104 because it turns out to be too big or there is a timeout) there is no
1105 "Completed" line in the log. When some messages of this type were
1106 selected by exigrep, they were listed as "not completed". Others were
1107 picked up by some special patterns. I have improved the selection
1108 criteria to be more general.
1110 PH/38 The host_find_failed option in the manualroute router can now be set
1111 to "ignore", to completely ignore a host whose IP address cannot be
1112 found. If all hosts are ignored, the behaviour is controlled by the new
1113 host_all_ignored option.
1115 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1116 homing or because of multiple MX records with /mx) generated more than
1117 one IP address, and the following item turned out to be the local host,
1118 all the secondary addresses of the first item were incorrectly removed
1119 from the list, along with the local host and any following hosts (which
1120 is what is supposed to happen).
1122 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1123 whoever called Exim into the -H file. In the case of the daemon it was
1124 behaving confusingly. When first started, it used values for whoever
1125 started the daemon, but after a SIGHUP it used the Exim user (because it
1126 calls itself on a restart). I have changed the code so that it now always
1129 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1130 message are rejected with the same error (e.g. no authentication or bad
1131 sender address), and a DATA command is nevertheless sent (as can happen
1132 with PIPELINING or a stupid MUA), the error message that was given to the
1133 RCPT commands is included in the rejection of the DATA command. This is
1134 intended to be helpful for MUAs that show only the final error to their
1137 PH/42 Another patch from the Sieve maintainer.
1139 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1140 Eximstats - Fixed some broken HTML links and added missing column headers
1142 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1143 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1145 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1147 PH/43 Yet another patch from the Sieve maintainer.
1149 PH/44 I found a way to check for a TCP/IP connection going away before sending
1150 the response to the final '.' that terminates a message, but only in the
1151 case where the client has not sent further data following the '.'
1152 (unfortunately, this is allowed). However, in many cases there won't be
1153 any further data because there won't be any more messages to send. A call
1154 to select() can be used: if it shows that the input is "ready", there is
1155 either input waiting, or the socket has been closed. An attempt to read
1156 the next input character can distinguish the two cases. Previously, Exim
1157 would have sent an OK response which the client would never have see.
1158 This could lead to message repetition. This fix should cure that, at
1159 least in a lot of common cases.
1161 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1162 advertised in response to EHLO.
1168 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1169 fixed by 4.65/MH/01 (is this a record?) are fixed:
1171 (i) An empty string was always treated as zero by the numeric comparison
1172 operators. This behaviour has been restored.
1174 (ii) It is documented that the numeric comparison operators always treat
1175 their arguments as decimal numbers. This was broken in that numbers
1176 starting with 0 were being interpreted as octal.
1178 While fixing these problems I realized that there was another issue that
1179 hadn't been noticed. Values of message_size_limit (both the global option
1180 and the transport option) were treated as octal if they started with 0.
1181 The documentation was vague. These values are now always treated as
1182 decimal, and I will make that clear in the documentation.
1188 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1189 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1192 MH/01 Don't check that the operands of numeric comparison operators are
1193 integers when their expansion is in "skipping" mode (fixes bug
1194 introduced by 4.64-PH/07).
1196 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1197 child addresses, Exim now panics and dies. Previously, because the count
1198 is held in a short int, deliveries were likely to be lost. As such a
1199 large number of recipients for a single message is ridiculous
1200 (performance will be very, very poor), I have chosen to impose a limit
1201 rather than extend the field.
1207 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1208 leftover -K file (the existence of which was triggered by #402).
1209 While we were at it, introduced process PID as part of the -K
1210 filename. This should rule out race conditions when creating
1213 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1214 processing considerably. Previous code took too long for large mails,
1215 triggering a timeout which in turn triggers #401.
1217 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1218 in the DK code in transports.c. sendfile() is not really portable,
1219 hence the _LINUX specificness.
1221 TF/01 In the add_headers option to the mail command in an Exim filter,
1222 there was a bug that Exim would claim a syntax error in any
1223 header after the first one which had an odd number of characters
1226 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1227 callout verification, Exim cached a "reject" for the entire domain. This
1228 is correct for most verifications, but it is not correct for a recipient
1229 verification with use_sender or use_postmaster set, because in that case
1230 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1231 case of MAIL FROM:<> rejection from other early rejections (e.g.
1232 rejection of HELO). When verifying a recipient using a non-null MAIL
1233 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1234 Whatever the result of the callout, the value of the domain cache is
1235 left unchanged (for any other kind of callout, getting as far as trying
1236 RCPT means that the domain itself is ok).
1238 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1241 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1242 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1243 session, the daemon ignores ECONNECT errors and logs others; it now
1244 ignores EPIPE as well.
1246 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1247 (quoted-printable decoding).
1249 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1250 later the small subsequent patch to fix an introduced bug.
1252 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1254 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1256 PH/08 An error is now given if message_size_limit is specified negative.
1258 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1259 to be given (somewhat) arbitrary names.
1261 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1264 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1265 miscellaneous code fixes
1267 PH/10 Added the log_reject_target ACL modifier to specify where to log
1270 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1271 hostname. This is wrong, because it relates to the incoming message (and
1272 probably the interface on which it is arriving) and not to the outgoing
1273 callout (which could be using a different interface). This has been
1274 changed to use the value of the helo_data option from the smtp transport
1275 instead - this is what is used when a message is actually being sent. If
1276 there is no remote transport (possible with a router that sets up host
1277 addresses), $smtp_active_hostname is used.
1279 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1280 tweaks were necessary in order to get it to work (see also 21 below):
1281 (a) The code assumed that strncpy() returns a negative number on buffer
1282 overflow, which isn't the case. Replaced with Exim's string_format()
1284 (b) There were several signed/unsigned issues. I just did the minimum
1285 hacking in of casts. There is scope for a larger refactoring.
1286 (c) The code used strcasecmp() which is not a standard C function.
1287 Replaced with Exim's strcmpic() function.
1288 (d) The code set only $1; it now sets $auth1 as well.
1289 (e) A simple test gave the error "authentication client didn't specify
1290 service in request". It would seem that Dovecot has changed its
1291 interface. Fortunately there's a specification; I followed it and
1292 changed what the client sends and it appears to be working now.
1294 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1297 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1298 address A is aliased to B and C, where B exists and C does not. Without
1299 -v the output is "A verified" because verification stops after a
1300 successful redirection if more than one address is generated. However,
1301 with -v the child addresses are also verified. Exim was outputting "A
1302 failed to verify" and then showing the successful verification for C,
1303 with its parentage. It now outputs "B failed to verify", showing B's
1304 parentage before showing the successful verification of C.
1306 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1307 look up a TXT record in a specific list after matching in a combined
1310 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1311 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1312 they consult the DNS. I had assumed they would set it the way they
1313 wanted; and indeed my experiments on Linux seem to show that in some
1314 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1315 To be on the safe side, however, I have now made the interface to
1316 host_find_byname() similar to host_find_bydns(), with an argument
1317 containing the DNS resolver options. The host_find_byname() function now
1318 sets these options at its start, just as host_find_bydns() does. The smtp
1319 transport options dns_qualify_single and dns_search_parents are passed to
1320 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1321 of host_find_byname() use the default settings of RES_DEFNAMES
1322 (qualify_single) but not RES_DNSRCH (search_parents).
1324 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1325 spool_read_header() do less string testing, by means of a preliminary
1326 switch on the second character of optional "-foo" lines. (This is
1327 overdue, caused by the large number of possibilities that now exist.
1328 Originally there were few.) While I was there, I also converted the
1329 str(n)cmp tests so they don't re-test the leading "-" and the first
1330 character, in the hope this might squeeze out yet more improvement.
1332 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1333 flag allowing group syntax was set by the header_syntax check but not
1334 turned off, possible causing trouble later; (2) The flag was not being
1335 set at all for the header_verify test, causing "group"-style headers to
1336 be rejected. I have now set it in this case, and also caused header_
1337 verify to ignore an empty address taken from a group. While doing this, I
1338 came across some other cases where the code for allowing group syntax
1339 while scanning a header line wasn't quite right (mostly, not resetting
1340 the flag correctly in the right place). These bugs could have caused
1341 trouble for malformed header lines. I hope it is now all correct.
1343 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1344 with the "reply" argument non-NULL. The code, however (which originally
1345 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1346 but it didn't always do it. This confused somebody who was copying the
1347 code for some other use. I have removed all the tests.
1349 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1350 feature that was used to support insecure browsers during the U.S. crypto
1351 embargo. It requires special client support, and Exim is probably the
1352 only MTA that supported it -- and would never use it because real RSA is
1353 always available. This code has been removed, because it had the bad
1354 effect of slowing Exim down by computing (never used) parameters for the
1355 RSA_EXPORT functionality.
1357 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1358 authenticator to fail if there's a tab character in the incoming data
1359 (there should never be unless someone is messing about, as it's supposed
1360 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1361 if the connection is using TLS or if the remote IP is the same as the
1362 local IP, and the "valid-client-cert option" if a client certificate has
1365 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1366 authenticators. This can be used for authorization after authentication
1367 succeeds. (In the case of plaintext, it servers for both authentication
1370 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1371 if any retry times were supplied.
1373 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1374 connection, where there is no client IP address to check. In this
1375 situation, the verify now always succeeds.
1377 PH/25 Applied John Jetmore's -Mset patch.
1379 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1381 PH/27 In a string expansion for a processed (not raw) header when multiple
1382 headers of the same name were present, leading whitespace was being
1383 removed from all of them, but trailing whitespace was being removed only
1384 from the last one. Now trailing whitespace is removed from each header
1385 before concatenation. Completely empty headers in a concatenation (as
1386 before) are ignored.
1388 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1389 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1391 PH/29 [Removed. This was a change that I later backed out, and forgot to
1392 correct the ChangeLog entry (that I had efficiently created) before
1393 committing the later change.]
1395 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1396 address errors (4xx response to RCPT) over the same connection as other
1397 messages routed to the same hosts. Such deliveries are always "forced",
1398 so retry times are not inspected. This resulted in far too many retries
1399 for the affected addresses. The effect occurred only when there were more
1400 hosts than the hosts_max_try setting in the smtp transport when it had
1401 the 4xx errors. Those hosts that it had tried were not added to the list
1402 of hosts for which the message was waiting, so if all were tried, there
1403 was no problem. Two fixes have been applied:
1405 (i) If there are any address or message errors in an SMTP delivery, none
1406 of the hosts (tried or untried) are now added to the list of hosts
1407 for which the message is waiting, so the message should not be a
1408 candidate for sending over the same connection that was used for a
1409 successful delivery of some other message. This seems entirely
1410 reasonable: after all the message is NOT "waiting for some host".
1411 This is so "obvious" that I'm not sure why it wasn't done
1412 previously. Hope I haven't missed anything, but it can't do any
1413 harm, as the worst effect is to miss an optimization.
1415 (ii) If, despite (i), such a delivery is accidentally attempted, the
1416 routing retry time is respected, so at least it doesn't keep
1417 hammering the server.
1419 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1420 in ${readsocket because some servers need this prod.
1422 PH/32 Added some extra debug output when updating a wait-xxx database.
1424 PH/33 The hint "could be header name not terminated by colon", which has been
1425 given for certain expansion errors for a long time, was not being given
1426 for the ${if def:h_colon_omitted{... case.
1428 PH/34 The spec says: "With one important exception, whenever a domain list is
1429 being scanned, $domain contains the subject domain." There was at least
1430 one case where this was not true.
1432 PH/35 The error "getsockname() failed: connection reset by peer" was being
1433 written to the panic log as well as the main log, but it isn't really
1434 panic-worthy as it just means the connection died rather early on. I have
1435 removed the panic log writing for the ECONNRESET error when getsockname()
1438 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1439 runs only) independently of the message's sender address. This meant
1440 that, if the 4xx error was in fact related to the sender, a different
1441 message to the same recipient with a different sender could confuse
1442 things. In particualar, this can happen when sending to a greylisting
1443 server, but other circumstances could also provoke similar problems.
1444 I have changed the default so that the retry time for these errors is now
1445 based a combination of the sender and recipient addresses. This change
1446 can be overridden by setting address_retry_include_sender=false in the
1449 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1450 remote server are returned as part of bounce messages. This was not
1451 happening for LMTP over a pipe (the lmtp transport), but now it is the
1452 same for both kinds of LMTP.
1454 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1455 in header lines that were in fact CNAMEs. This is no longer the case.
1457 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1458 and queue runs started by the daemon processed all messages. This has
1459 been fixed so that -R and -S can now usefully be given with -q<time>.
1461 PH/40 Import PCRE release 6.7 (fixes some bugs).
1463 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1465 PH/42 Give an error if -q is specified more than once.
1467 PH/43 Renamed the variables $interface_address and $interface_port as
1468 $received_ip_address and $received_port, to make it clear that these
1469 values apply to message reception, and not to the outgoing interface when
1470 a message is delivered. (The old names remain recognized, of course.)
1472 PH/44 There was no timeout on the connect() call when using a Unix domain
1473 socket in the ${readsocket expansion. There now is.
1475 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1476 be meaningful with "accept".
1478 SC/01 Eximstats V1.43
1479 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1481 SC/02 Eximstats V1.44
1482 Use a glob alias rather than an array ref in the generated
1483 parser. This improves both readability and performance.
1485 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1486 Collect SpamAssassin and rejection statistics.
1487 Don't display local sender or destination tables unless
1488 there is data to show.
1489 Added average volumes into the top table text output.
1491 SC/04 Eximstats V1.46
1492 Collect data on the number of addresses (recipients)
1493 as well as the number of messages.
1495 SC/05 Eximstats V1.47
1496 Added 'Message too big' to the list of mail rejection
1497 reasons (thanks to Marco Gaiarin).
1499 SC/06 Eximstats V1.48
1500 Mainlog lines which have GMT offsets and are too short to
1501 have a flag are now skipped.
1503 SC/07 Eximstats V1.49 (Alain Williams)
1504 Added the -emptyok flag.
1506 SC/08 Eximstats V1.50
1507 Fixes for obtaining the IP address from reject messages.
1509 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1510 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1511 whitesspace changes from 4.64-PH/27
1513 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1516 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1517 are found, allow negative numbers in numeric criteria)
1519 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1521 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1522 to match changes made in 4.64-PH/43
1524 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1526 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1527 "domain" is actually an IP address, and force a failure. This locks out
1528 those revolvers/nameservers that support "A-for-A" lookups, in
1529 contravention of the specifications.
1531 PH/48 When a host name was looked up from an IP address, and the subsequent
1532 forward lookup of the name timed out, the host name was left in
1533 $sender_host_name, contrary to the specification.
1535 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1536 restricted to single-key lookups, Exim was not diagnosing an error if
1537 * or *@ was used with a query-style lookup.
1539 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1541 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1542 long ago, but noone interested enough thought of it. Let's just say that
1543 the "1.1" means that there are some new functions that weren't there at
1544 some point in the past.
1546 PH/51 Error processing for expansion failure of helo_data from an smtp
1547 transport during callout processing was broken.
1549 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1550 tested/used via the -bh/-bhc/-bs options.
1552 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1553 bug, fixed in subsequent PCRE releases).
1555 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1556 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1558 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1564 SC/01 Use a glob alias rather than an array ref in eximstats generated
1565 parser. This improves both readability and performance.
1567 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1568 Don't display local sender or destination tables in eximstats unless
1569 there is data to show.
1570 Added average volumes into the eximstats top table text output.
1572 SC/03 Collect data on the number of addresses (recipients) as well
1573 as the number of messages in eximstats.
1575 TF/01 Correct an error in the documentation for the redirect router. Exim
1576 does (usually) call initgroups() when daemonizing.
1578 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1579 with consistent privilege compared to when running as a daemon.
1581 TF/03 Note in the spec that $authenticated_id is not set for local
1582 submissions from trusted users.
1584 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1585 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1587 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1588 by adding some example configuration directives to the default
1589 configuration file. A little bit of work is required to uncomment the
1590 directives and define how usernames and passwords are checked, but
1591 there is now a framework to start from.
1593 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1594 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1595 without this. I don't know how relevant this is to other LDAP libraries.
1597 PH/02 Add the verb name to the "unknown ACL verb" error.
1599 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1601 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1603 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1604 directory not expanded when it should be if an expanded home directory
1605 was set for the address (which is overridden by the transport).
1607 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1610 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1611 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1612 because it is too late at that time, and has no effect.
1614 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1615 security issue with \' (bugzilla #107). I could not use the
1616 PQescapeStringConn() function, because it needs a PGconn value as one of
1619 PH/08 When testing addresses using -bt, indicate those final addresses that
1620 are duplicates that would not cause an additional delivery. At least one
1621 person was confused, thinking that -bt output corresponded to deliveries.
1622 (Suppressing duplicates isn't a good idea as you lose the information
1623 about possibly different redirections that led to the duplicates.)
1625 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1626 systems where poll() doesn't work, in particular OS X.
1628 PH/10 Added more information to debugging output for retry time not reached.
1630 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1631 operations in malware.c.
1633 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1636 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1637 syslog_duplication set false, log lines that would normally be written
1638 both the the main log and to the reject log were not written to syslog at
1641 PH/14 In the default configuration, change the use of "message" in ACL warn
1642 statements to "add_header".
1644 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1645 not followed by a command (e.g. "seen endif").
1647 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1648 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1651 PH/17 Added extra conditions to the default value of delay_warning_condition
1655 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1656 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1657 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1660 The Auto-Submitted: and various List- headers are standardised, whereas I
1661 don't think Precedence: ever was.
1663 PH/18 Refactored debugging code in route_finduser() to show more information,
1664 in particular, the error code if getpwnam() issues one.
1666 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1667 This is apparently needed in addition to the PH/07 change above to avoid
1668 any possible encoding problems.
1670 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1671 but not after initializing Perl.
1673 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1674 output them only if debugging. By default they are written stderr,
1675 apparently, which is not desirable.
1677 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1680 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1683 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1685 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1686 authenticated or an ident call has been made. Suppress the default
1687 values for $authenticated_id and $authenticated_sender (but permit -oMai
1688 and -oMas) when testing with -bh.
1690 PH/24 Re-jigged the order of the tests in the default configuration so that the
1691 tests for valid domains and recipients precede the DNS black list and CSA
1692 tests, on the grounds that those ones are more expensive.
1694 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1695 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1696 This bug exists in every version of Exim that I still have, right back to
1699 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1700 However, an attempt to turn on case-sensitivity in a regex key by
1701 including (?-i) didn't work because the subject string was already
1702 lowercased, and the effects were non-intuitive. It turns out that a
1703 one-line patch can be used to allow (?-i) to work as expected.
1709 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1710 other effects) broke the use of negated acl sub-conditions.
1712 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1715 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1716 "Deny" causes Exim to reject the incoming connection with a 554 error.
1717 Unfortunately, if there is a major crisis, such as a disk failure,
1718 tcp-wrappers gives "deny", whereas what one would like would be some
1719 kind of temporary error. A kludge has been added to help with this.
1720 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1721 554 error is used if errno is still zero or contains ENOENT (which occurs
1722 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1725 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1727 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1728 errors. Otherwise a message that provokes a temporary error (when other
1729 messages do not) can cause a whole host to time out.
1731 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1732 addresses were routed directly to files or pipes from a redirect router.
1733 File deliveries just didn't batch; pipe deliveries might have suffered
1736 PH/06 A failure to get a lock for a hints database would erroneously always say
1737 "Failed to get write lock", even when it was really a read lock.
1739 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1740 of 0600. This has been changed to use the value of the lockfile_mode
1741 option (which defaults to 0600).
1743 PH/08 Applied small patch from the Sieve maintainer.
1745 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1746 folder from quota calculations, a direct delivery into this folder messed
1747 up the contents of the maildirsize file. This was because the regex was
1748 used only to exclude .Trash (or whatever) when the size of the mailbox
1749 was calculated. There was no check that a delivery was happening into an
1750 excluded directory. This bug has been fixed by ignoring all quota
1751 processing for deliveries into excluded directories.
1753 PH/10 Added the maildirfolder_create_regex option to appendfile.
1759 PH/01 The code for finding all the local interface addresses on a FreeBSD
1760 system running IPv6 was broken. This may well have applied to all BSD
1761 systems, as well as to others that have similar system calls. The broken
1762 code found IPv4 interfaces correctly, but gave incorrect values for the
1763 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1764 that it would not match correctly against @[] and not recognize the IPv6
1767 PH/02 The ipliteral router was not recognizing addresses of the form user@
1768 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1770 PH/03 Added disable_ipv6.
1772 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1773 decoded form, because it is most often used to construct To: headers
1774 lines in autoreplies, and the decoded form may well be syntactically
1775 invalid. However, $reply_address has leading white space removed, and all
1776 newlines turned into spaces so that the autoreply transport does not
1779 PH/05 If group was specified without a user on a router, and no group or user
1780 was specified on a transport, the group from the router was ignored.
1782 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1783 for visible compile-time settings that can be used to change these
1784 numbers, for those that want even more. Backwards compatibility with old
1785 spool files has been maintained. However, going back to a previous Exim
1786 release will lost any variables that are in spool files.
1788 PH/07 Two small changes when running in the test harness: increase delay when
1789 passing a TCP/IP connection to a new process, in case the original
1790 process has to generate a bounce, and remove special handling of
1791 127.0.0.2 (sic), which is no longer necessary.
1793 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1794 be the same on different OS.
1796 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1799 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1800 whether --show-vars was specified or not
1802 JJ/02 exipick: Added support for new ACL variable spool format introduced
1805 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1806 syntactically invalid From: or Reply-to: line, and a filter used this to
1807 generate an autoreply, and therefore failed to obtain an address for the
1808 autoreply, Exim could try to deliver to a non-existent relative file
1809 name, causing unrelated and misleading errors. What now happens is that
1810 it logs this as a hard delivery error, but does not attempt to create a
1813 PH/11 The exinext utility has a -C option for testing purposes, but although
1814 the given file was scanned by exinext itself; it wasn't being passed on
1815 when Exim was called.
1817 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1818 an end-of-file indication when reading a command response.
1820 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1821 compiled. In many other places in Exim, IPv6 addresses are always
1822 recognized, so I have changed this. It also means that IPv4 domain
1823 literals of the form [IPV4:n.n.n.n] are now always recognized.
1825 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1826 used if the router is not running as root, for example, when verifying at
1827 ACL time, or when using -bh. The debugging output from this situation was
1828 non-existent - all you got was a failure to exec. I have made two
1831 (a) Failures to set uid/gid, the current directory, or a process leader
1832 in a subprocess such as that created by queryprogram now generate
1833 suitable debugging ouput when -d is set.
1835 (b) The queryprogram router detects when it is not running as root,
1836 outputs suitable debugging information if -d is set, and then runs
1837 the subprocess without attempting to change uid/gid.
1839 PH/15 Minor change to Makefile for building test_host (undocumented testing
1842 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1843 additional section of a DNS packet that returns MX or SRV records.
1844 Instead, it always explicitly searches for A/AAAA records. This avoids
1845 major problems that occur when a DNS server includes only records of one
1846 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1847 fixed another bug: if SRV records were looked up and the corresponding
1848 address records were *not* found in the additional section, the port
1849 values from the SRV records were lost.
1851 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1852 using the correct key (the original address) when searching the retry
1853 rules in order to find which one to use for generating the retry hint.
1855 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1856 adding the default one. Similarly, if it contains a Reply-To: header, the
1857 errors_reply_to option, if set, is not used.
1859 PH/19 When calculating a retry time, Exim used to measure the "time since
1860 failure" by looking at the "first failed" field in the retry record. Now
1861 it does not use this if it is later than than the arrival time of the
1862 message. Instead it uses the arrival time. This makes for better
1863 behaviour in cases where some deliveries succeed, thus re-setting the
1864 "first failed" field. An example is a quota failure for a huge message
1865 when small messages continue to be delivered. Without this change, the
1866 "time since failure" will always be short, possible causing more frequent
1867 delivery attempts for the huge message than are intended.
1868 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1870 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1871 $1, $2, $3) because the numerical variables can be reset during some
1872 expansion items (e.g. "match"), thereby losing the authentication data.
1874 PH/21 Make -bV show the size of off_t variables so that the test suite can
1875 decide whether to run tests for quotas > 2G.
1877 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1878 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1879 filecount value is greater than 2G or if a quota value is greater than 2G
1880 on a system where the size of off_t is not greater than 4, a panic error
1883 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1884 never match. The debug and -bh output now contains an explicit error
1885 message indicating a malformed IPv4 address or mask.
1887 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1888 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1889 PH/23 above applies.
1891 PH/25 Do not write to syslog when running in the test harness. The only
1892 occasion when this arises is a failure to open the main or panic logs
1893 (for which there is an explicit test).
1895 PH/26 Added the /no_tell option to "control=freeze".
1897 PH/27 If a host name lookup failed very early in a connection, for example, if
1898 the IP address matched host_lookup and the reverse lookup yielded a name
1899 that did not have a forward lookup, an error message of the form "no IP
1900 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1901 could be logged. Now it outputs the IP address instead of "NULL".
1903 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1904 allows the sender and the authenticated sender to be set when
1905 submitting a message from within Exim. Since child_open_exim() is
1906 documented for local_scan(), the new function should be too.
1908 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1909 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1910 results in an empty string is now treated as unset.
1912 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1914 PH/31 Added sender_verify_fail logging option.
1916 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1917 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1918 tidied the source and removed it altogether.
1920 PH/33 When a queue run was abandoned because the load average was too high, a
1921 log line was always written; now it is written only if the queue_run log
1922 selector is set. In addition, the log line for abandonment now contains
1923 information about the queue run such as the pid. This is always present
1924 in "start" and "stop" lines but was omitted from the "abandon" line.
1926 PH/34 Omit spaces between a header name and the colon in the error message that
1927 is given when verify = headers_syntax fails (if there are lots of them,
1928 the message gets confusing).
1930 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1931 names, as there are now some PTR records that contain slashes. This check
1932 is only to protect against broken name servers that fall over on strange
1933 characters, so the fact that it applies to all lookups doesn't matter.
1935 PH/36 Now that the new test suite is complete, we can remove some of the
1936 special code in Exim that was needed for the old test suite. For example,
1937 sorting DNS records because real resolvers return them in an arbitrary
1938 order. The new test suite's fake resolver always returns records in the
1941 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1942 bounces) except when queue_only is set, to avoid logging races between
1943 the different processes.
1945 PH/38 Panic-die if .include specifies a non-absolute path.
1947 PH/39 A tweak to the "H" retry rule from its user.
1949 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1950 a label. They prevented compilation on older perls.
1952 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1953 a warning to be raised on newish perls.
1955 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1956 on queue. Changes to match documented behaviour of showing count of
1957 messages matching specified criteria.
1959 PH/40 Changed the default ident timeout from 30s to 5s.
1961 PH/41 Added support for the use of login_cap features, on those BSD systems
1962 that have them, for controlling the resources used by pipe deliveries.
1964 PH/42 The content-scanning code uses fopen() to create files in which to put
1965 message data. Previously it was not paying any attention to the mode of
1966 the files. Exim runs with umask(0) because the rest of the code creates
1967 files with open(), and sets the required mode explicitly. Thus, these
1968 files were ending up world-writeable. This was not a big issue, because,
1969 being within the spool directory, they were not world-accessible. I have
1970 created a function called modefopen, which takes an additional mode
1971 argument. It sets umask(777), creates the file, chmods it to the required
1972 mode, then resets the umask. All the relevant calls to fopen() in the
1973 content scanning code have been changed to use this function.
1975 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1976 to 24 hours. This avoids potential overflow problems when processing G
1977 and H retry rules. I suspect nobody ever tinkers with this value.
1979 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1981 PH/45 When the plaintext authenticator is running as a client, the server's
1982 challenges are checked to ensure they are valid base64 strings. By
1983 default, the authentication attempt is cancelled if an invalid string is
1984 received. Setting client_ignore_invalid_base64 true ignores these errors.
1985 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1986 they are received. Thus, the responses can be made to depend on the
1987 challenges. If an invalid string is ignored, an empty string is placed in
1990 PH/46 Messages that are created by the autoreply transport now contains a
1991 References: header, in accordance with RFCs 2822 and 3834.
1993 PH/47 Added authenticated_sender_force to the smtp transport.
1995 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1997 PH/49 Installed latest patch from the Sieve maintainer.
1999 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2000 was also set, the appendfile transport was unnecessarily scanning a
2001 directory of message files (e.g. for maildir delivery) to find the count
2002 of files (along with the size), even though it did not need this
2003 information. It now does the scan only if it needs to find either the
2004 size of the count of files.
2006 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2008 PH/52 Two bugs concerned with error handling when the smtp transport is
2011 (i) Exim was not creating retry information for temporary errors given
2012 for individual recipients after the DATA command when the smtp transport
2013 was used in LMTP mode. This meant that they could be retried too
2014 frequently, and not timed out correctly.
2016 (ii) Exim was setting the flag that allows error details to be returned
2017 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2018 recipients that were returned after the DATA command.
2020 PH/53 This is related to PH/52, but is more general: for any failing address,
2021 when detailed error information was permitted to be returned to the
2022 sender, but the error was temporary, then after the final timeout, only
2023 "retry timeout exceeded" was returned. Now it returns the full error as
2024 well as "retry timeout exceeded".
2026 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2027 do this, and (what is worse) MTAs that accept it.
2029 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2030 will now be deprecated.
2032 PH/56 New os.c-cygwin from the Cygwin maintainer.
2034 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2035 formats (previously only available in exim formats via -bpr, -bpru,
2036 and -bpra. Now also available in native and exiqgrep formats)
2038 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2039 with very large, slow to parse queues
2041 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2043 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2045 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2046 responses to authentication challenges, though it was showing the
2047 challenges; (ii) I've removed the CR characters from the debug output for
2050 PH/58 Allow for the insertion of a newline as well as a space when a string
2051 is turned into more than one encoded-word during RFC 2047 encoding. The
2052 Sieve code now uses this.
2054 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2055 data_4xx, lost_connection, tls_required.
2057 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2058 message was being sent as an SMTP response.
2060 PH/61 Add -l and -k options to exicyclog.
2062 PH/62 When verifying, if an address was redirected to one new address, so that
2063 verification continued, and the new address failed or deferred after
2064 having set something in $address_data, the value of $address_data was not
2065 passed back to the ACL. This was different to the case when no
2066 redirection occurred. The value is now passed back in both cases.
2068 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2069 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2070 use login_cap.h, so on its own it isn't the distinguishing feature. The
2071 new name refers directly to the setclassresources() function.
2073 PH/65 Added configuration files for NetBSD3.
2075 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2077 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2078 is preferred over IPv4.
2080 PH/68 The bounce_return_message and bounce_return_body options were not being
2081 honoured for bounces generated during the reception of non-SMTP messages.
2082 In particular, this applied to messages rejected by the ACL. This bug has
2083 been fixed. However, if bounce_return_message is true and bounce_return_
2084 body is false, the headers that are returned for a non-SMTP message
2085 include only those that have been read before the error was detected.
2086 (In the case of an ACL rejection, they have all been read.)
2088 PH/69 The HTML version of the specification is now built in a directory called
2089 spec_html instead of spec.html, because the latter looks like a path with
2090 a MIME-type, and this confuses some software.
2092 PH/70 Catch two compiler warnings in sieve.c.
2094 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2095 function verify_get_ident() calls ip_connect() to connect a socket, but
2096 if the "connect()" function timed out, ip_connect() used to close the
2097 socket. However, verify_get_ident() also closes the socket later, and in
2098 between Exim writes to the log, which may get opened at this point. When
2099 the socket was closed in ip_connect(), the log could get the same file
2100 descriptor number as the socket. This naturally causes chaos. The fix is
2101 not to close the socket in ip_connect(); the socket should be closed by
2102 the function that creates it. There was only one place in the code where
2103 this was missing, in the iplookup router, which I don't think anybody now
2104 uses, but I've fixed it anyway.
2106 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2107 well as to direct DNS lookups. Otherwise the handling of names in host
2108 lists is inconsistent and therefore confusing.
2114 PH/01 Two changes to the default runtime configuration:
2116 (1) Move the checks for relay_from_hosts and authenticated clients from
2117 after to before the (commented out) DNS black list checks.
2119 (2) Add control=submission to the relay_from_hosts and authenticated
2120 clients checks, on the grounds that messages accepted by these
2121 statements are most likely to be submissions.
2123 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2125 (1) Generate an error if the third argument for the ${prvs expansion is
2128 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2131 (3) Reset the variables that are obtained from the first argument of
2132 ${prvscheck and used in the second argument before leaving the code,
2133 because their memory is reclaimed, so using them afterwards may do
2136 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2137 one (it's much easier than Tom thought :-).
2139 (5) Because of (4), we can now allow for the use of $prvscheck_result
2140 inside the third argument.
2142 PH/03 For some reason, the default setting of PATH when running a command from
2143 a pipe transport was just "/usr/bin". I have changed it to
2146 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2147 anything to be listed in the output from -bV.
2149 PH/05 When a filter generated an autoreply, the entire To: header line was
2150 quoted in the delivery log line, like this:
2152 => >A.N.Other <ano@some.domain> <original@ddress> ...
2154 This has been changed so that it extracts the operative address. There
2155 may be more than one such address. If so, they are comma-separated, like
2158 => >ano@some.domain,ona@other.domain <original@ddress> ...
2160 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2161 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2162 not being looked up in the rDNS to get a host name, Exim was showing the
2163 IP address twice in Received: lines, even though the IP addresses were
2164 identical. For example:
2166 Received: from [1.2.3.4] (helo=[1.2.3.4])
2168 However, if the real host name was known, it was omitting the HELO data
2169 if it matched the actual IP address. This has been tidied up so that it
2170 doesn't show the same IP address twice.
2172 PH/07 When both +timestamp and +memory debugging was on, the value given by
2173 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2174 called by the debug printing, thereby overwriting the timestamp buffer.
2175 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2177 PH/08 When the original message was included in an autoreply transport, it
2178 always said "this is a copy of the message, including all the headers",
2179 even if body_only or headers_only was set. It now gives an appropriate
2182 PH/09 Applied a patch from the Sieve maintainer which:
2184 o fixes some comments
2185 o adds the (disabled) notify extension core
2186 o adds some debug output for the result of if/elsif tests
2187 o points to the current vacation draft in the documentation
2188 and documents the missing references header update
2192 o fixes a bug in processing the envelope test (when testing
2193 multiple envelope elements, the last element determinted the
2196 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2197 Electronic Mail") by including:
2199 Auto-submitted: auto-generated
2201 in the messages that it generates (bounce messages and others, such as
2202 warnings). In the case of bounce messages for non-SMTP mesages, there was
2203 also a typo: it was using "Auto_submitted" (underscore instead of
2204 hyphen). Since every message generated by Exim is necessarily in response
2205 to another message, thes have all been changed to:
2207 Auto-Submitted: auto-replied
2209 in accordance with these statements in the RFC:
2211 The auto-replied keyword:
2213 - SHOULD be used on messages sent in direct response to another
2214 message by an automatic process,
2216 - MUST NOT be used on manually-generated messages,
2218 - MAY be used on Delivery Status Notifications (DSNs) and Message
2219 Disposition Notifications (MDNs),
2221 - MUST NOT be used on messages generated by automatic or periodic
2222 processes, except for messages which are automatic responses to
2225 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2226 to the default Received: header definition.
2228 PH/12 Added log selector acl_warn_skipped (default on).
2230 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2231 variables because (a) they are in the wrong storage pool and (b) even if
2232 they were copied, it wouldn't work properly because of the caching.
2234 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2235 checking when decoding. Apparently there are clients that generate
2236 overlong encoded strings. Why am I not surprised?
2238 PH/15 If the first argument of "${if match_address" was not empty, but did not
2239 contain an "@" character, Exim crashed. Now it writes a panic log message
2240 and treats the condition as false.
2242 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2244 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2245 extension "envelope-auth". The code is finished and in agreement with
2246 other implementations, but there is no documentation so far and in fact,
2247 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2248 not changing the active code.
2250 Print executed "if" and "elsif" statements when debugging is used. This
2251 helps a great deal to understand what a filter does.
2253 Document more things not specified clearly in RFC3028. I had all this
2254 sorted out, when out of a sudden new issues came to my mind. Oops."
2256 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2259 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2260 canonical form (as documented). However, after a host name lookup from
2261 the IP address, check_host() was doing a simple string comparison with
2262 addresses acquired from the DNS when checking that the found name did
2263 have the original IP as one of its addresses. Since any found IPv6
2264 addresses are likely to be in abbreviated form, the comparison could
2265 fail. Luckily, there already exists a function for doing the comparison
2266 by converting both addresses to binary, so now that is used instead of
2267 the text comparison.
2269 PH/20 There was another similar case to PH/19, when a complete host name was
2270 given in a host list; looking up its IP address could give an abbreviated
2271 form, whereas the current host's name might or might not be abbreviated.
2272 The same fix has been applied.
2278 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2279 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2282 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2283 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2285 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2287 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2288 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2289 Also, for "Auto-Submitted", treat anything other than "no" as
2290 non-personal, in accordance with RFC 3834. (Previously it treated
2291 anything starting "auto-" as non-personal.)
2293 TF/01 The control=submission/name=... option had a problem with syntax
2294 errors if the name included a slash character. The /name= option
2295 now slurps the rest of the string, so it can include any characters
2296 but it must come last in the list of options (after /sender_retain
2299 PH/05 Some modifications to the interface to the fake nameserver for the new
2307 TK/01 Added the "success_on_redirect" address verification option. See
2308 NewStuff for rationale and an example.
2310 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2312 PH/02 Patch to exigrep to allow it to work on syslog lines.
2314 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2315 fread() to skip over the body file's header line, because in Cygwin the
2316 header line is locked and is inaccessible.
2318 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2319 co-exist for some time) to make it clear that it is the Exim ID that is
2320 referenced, not the Message-ID: header line.
2322 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2323 string_format() function, because snprintf() does not exist on all
2326 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2327 ${stat: expansion item.
2329 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2330 protocol synchronization error", to keep the pedants happy.
2332 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2333 well as for IRIX systems, when gcc is being used. See the host.c source
2336 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2338 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2341 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2342 transport and to the smtp transport in LMTP mode.
2344 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2346 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2347 run a filter in a subprocess. This could lead to confusion in subsequent
2348 lookups in the parent process. There should also be a search_tidyup() at
2349 the end of the subprocess.
2351 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2352 only if the host matched helo_try_verify_hosts, which caused the
2353 verification to occur when the EHLO/HELO command was issued. The ACL just
2354 tested the remembered result. Now, if a previous verification attempt has
2355 not happened, "verify = helo" does it there and then.
2357 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2359 TK/03 Fix log output including CR from clamd.
2361 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2362 exist provoked a memory error which could cause a segfault.
2364 PH/15 Installed PCRE 6.2
2366 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2368 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2369 of the problem. Specifically, suggested +O2 rather than +O1 for the
2372 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2374 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2375 record, the port was not correctly logged when the outgoing_port log
2376 selector was set (it logged the transort's default port).
2378 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2379 fallback_hosts, and "hosts" in the smtp transport.
2381 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2382 host errors such as "Connection refused".
2384 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2385 authentication with radiusclient 0.4.9:
2387 - Error returned from rc_read_config was caught wrongly
2388 - Username/password not passed on to radius server due to wrong length.
2390 The presumption is that some radiusclient API changes for 4.51/PH/17
2391 were not taken care of correctly. The code is still untested by me (my
2392 Linux distribution still has 0.3.2 of radiusclient), but it was
2393 contributed by a Radius user.
2395 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2396 expanding the "port" option of the smtp transport.
2398 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2399 while reading a MIME header. Thanks to Tom Hughes for a patch.
2401 PH/24 Include config.h inside local_scan.h so that configuration settings are
2404 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2405 that in an ACL for RCPT (for example), you can examine exactly what was
2408 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2409 commands, but it was not correctly comparing the address with the actual
2410 client host address. Thus, it would show the EHLO address in Received:
2411 header lines when this was not necessary.
2413 PH/27 Added the % operator to ${eval:}.
2415 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2416 it should be ignoring failures (because with -C, for example, it has lost
2417 privilege). It wasn't ignoring creation failures other than "already
2420 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2423 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2424 because an input line was too long, either on its own, or by virtue of
2425 too many continuations, the temporary file was not being removed, and the
2426 return code was incorrect.
2428 PH/31 Missing "BOOL" in function definition in filtertest.c.
2430 PH/32 Applied Sieve patches from the maintainer.
2432 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2434 PH/33 Added "verify = not_blind".
2436 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2437 Local/Makefile (with some defaults set). These are used in built scripts
2438 such as exicyclog, but they have never been used in the exim_install
2439 script (though there are many overriding facilities there). I have
2440 arranged that the exim_install script now takes note of these two
2443 PH/35 Installed configuration files for Dragonfly.
2445 PH/36 When a locally submitted message by a trusted user did not contain a
2446 From: header, and the sender address was obtained from -f or from an SMTP
2447 MAIL command, and the trusted user did not use -F to supply a sender
2448 name, $originator_name was incorrectly used when constructing a From:
2449 header. Furthermore, $originator_name was used for submission mode
2450 messages from external hosts without From: headers in a similar way,
2451 which is clearly wrong.
2453 PH/37 Added control=suppress_local_fixups.
2455 PH/38 When log_selector = +received_sender was set, and the addition of the
2456 sender made the log line's construction buffer exactly full, or one byte
2457 less than full, an overflow happened when the terminating "\n" was
2460 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2461 when the result of a list match is failure because a DNS lookup failed.
2463 PH/40 RM_COMMAND is now used in the building process.
2465 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2466 the "build-* directories that it finds.
2468 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2469 address in a domain literal was a prefix of an interface address.
2471 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2472 when verifying a sender address, unless rewrite_headers is false.
2474 PH/44 Wrote a long comment about why errors_to addresses are verified as
2475 recipients, not senders.
2477 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2478 the ratelimit ACL was added.
2480 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2482 PH/46 Added extra information about PostgreSQL errors to the error string.
2484 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2485 avoiding the need to install special zones in a real server. This is
2486 backwards compatible; if it can't find the fake resolver, it drops back.
2487 Thus, both old and new test suites can be run.
2489 TF/02 Added util/ratelimit.pl
2491 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2492 clock is set back in time.
2494 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2495 Candler <B.Candler@pobox.com>.
2497 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2498 OK for addresses that are the result of redirections.
2500 PH/48 A number of further additions for the benefit of the new test suite,
2501 including a fake gethostbyname() that interfaces to the fake DNS resolver
2504 TF/06 The fix for widen_domains has also been applied to qualify_single and
2505 search_parents which are the other dnslookup options that can cause
2508 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2511 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2513 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2514 service" if it encountered an MX record with an empty target hostname.
2515 The message is now "an MX or SRV record indicated no SMTP service".
2517 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2518 if the DNS of the sending site is misconfigured. This is quite a
2519 common situation. This change restores the behaviour of treating a
2520 helo verification defer as a failure.
2522 PH/51 If self=fail was set on a router, the bounce message did not include the
2523 actual error message.
2529 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2531 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2532 command itself ended in error, the underlying message about the transport
2533 filter timeout was being overwritten with the pipe command error. Now the
2534 underlying error message should be appended to the second error message.
2536 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2538 PH/02 Reduce the amount of output that "make" produces by default. Full output
2539 can still be requested.
2541 PH/03 The warning log line about a condition test deferring for a "warn" verb
2542 was being output only once per connection, rather than after each
2543 occurrence (because it was using the same function as for successful
2544 "warn" verbs). This seems wrong, so I have changed it.
2546 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2547 it should not have, which might have caused a crash in the right
2548 circumstances, but probably never did.
2550 PH/04 Installed a modified version of Tony Finch's patch to make submission
2551 mode fix the return path as well as the Sender: header line, and to
2552 add a /name= option so that you can make the user's friendly name appear
2555 TF/03 Added the control = fakedefer ACL modifier.
2557 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2558 Mark Lowes for thorough testing.
2560 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2562 TK/03 Merged latest SRS patch from Miles Wilton.
2564 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2565 with the definition in sysexits.h (which is #included earlier).
2566 Fortunately, Exim does not actually use EX_OK. The code used to try to
2567 preserve the sysexits.h value, by assumimg that macro definitions were
2568 scanned for macro replacements. I have been disabused of this notion,
2569 so now the code just undefines EX_OK before #including unistd.h.
2571 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2572 in the smtp transport. When a block could not be written in a single
2573 write() function, the timeout was being re-applied to each part-write.
2574 This seems wrong - if the receiver was accepting one byte at a time it
2575 would take for ever. The timeout is now adjusted when this happens. It
2576 doesn't have to be particularly precise.
2578 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2579 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2581 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2582 without a domain if the check to <postmaster@domain> fails.
2584 SC/01 Eximstats: added -xls and the ability to specify output files
2585 (patch written by Frank Heydlauf).
2587 SC/02 Eximstats: use FileHandles for outputing results.
2589 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2591 SC/04 Eximstats: fixed display of large numbers with -nvr option
2593 SC/05 Eximstats: fixed merging of reports with empty tables.
2595 SC/06 Eximstats: added the -include_original_destination flag
2597 SC/07 Eximstats: removed tabs and trailing whitespace.
2599 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2601 TK/06 MBOX spool code: Add real "From " MBOX separator line
2602 so the .eml file is really in mbox format (even though
2603 most programs do not really care). Patch from Alex Miller.
2605 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2606 The latter is generated from $received_to and is only set if the
2607 message has one envelope recipient. SA can use these headers,
2608 obviously out-of-the-box. Patch from Alex Miller.
2610 PH/08 The ${def test on a variable was returning false if the variable's
2611 value was "0", contrary to what the specification has always said!
2612 The result should be true unless the variable is empty.
2614 PH/09 The syntax error of a character other than { following "${if
2615 def:variable_name" (after optional whitespace) was not being diagnosed.
2616 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2617 accidental colon was present, for example, could give incorrect results.
2619 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2620 result is used (not including appendfile, where other changes are about
2623 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2624 This involved changing a lot of size variables from int to off_t. It
2625 should work with maildirs and everything.
2627 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2628 spamd dying while we are connected to it.
2630 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2633 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2634 function for BDB 4.3.
2636 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2638 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2639 the sources for PCRE have been re-arranged and more files are now
2642 PH/15 The code I had for printing potentially long long variables in PH/11
2643 above was not the best (it lost precision). The length of off_t variables
2644 is now inspected at build time, and an appropriate printing format (%ld
2645 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2646 to be "long long int" or "long int". This is needed for the internal
2647 formatting function string_vformat().
2649 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2650 the configuration file to be ":syslog", then the script "guesses" where
2651 the logs files are, rather than using the compiled in default. In our
2652 case the guess is not the same as the compiled default, so the script
2653 suddenly stopped working when I started to use syslog. The patch checks
2654 to see if log_file_path is "". If so, it attempts to read it from exim
2655 with no configuration file to get the compiled in version, before it
2656 falls back to the previous guessing code."
2658 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2659 implementing BATV in an Exim configuration. See NewStuff for the gory
2662 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2663 Makefile that are specific to HP-UX.
2665 PH/18 If the "use_postmaster" option was set for a recipient callout together
2666 with the "random" option, the postmaster address was used as the MAIL
2667 FROM address for the random test, but not for the subsequent recipient
2668 test. It is now used for both.
2670 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2671 patch removes a few documentation additions to RFC 3028, because the
2672 latest draft now contains them. It adds the new en;ascii-case comparator
2673 and a new error check for 8bit text in MIME parts. Comparator and
2674 require names are now matched exactly. I enabled the subaddress
2675 extension, but it is not well tested yet (read: it works for me)."
2677 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2678 rework some of the code of TK/09 above to avoid the hardwired use of
2679 "%lld" and "long long". Replaced the call to snprintf() with a call to
2682 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2683 records point to non-existent hosts", "retry timeout exceeded", and
2684 "retry time not reached for any host after a long failure period".
2686 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2687 experimental DomainKeys support:
2689 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2690 (2) On an error such as an illegally used "control", the wrong name for
2691 the control was given.
2693 These problems did NOT occur unless DomainKeys support was compiled.
2695 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2697 PH/24 Added ${if match_ip condition.
2699 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2700 databases so that it will be absolutely obvious if a crash occurs in the
2701 DB library. This is a regular occurrence (often caused by mis-matched
2704 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2705 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2706 picked up on a user's system that detects such things. There doesn't seem
2707 to be a gcc warning option for this - only an attribute that has to be
2708 put on the function's prototype. It seems that in Fedora Core 4 they have
2709 set this on a number of new functions. No doubt there will be more in due
2712 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2713 specify a transport. However, if an address that was verified by such a
2714 router was the subject of a callout, Exim crashed because it tried to
2715 read the rcpt_include_affixes from the non-existent transport. Now it
2716 just assumes that the setting of that option is false. This bug was
2717 introduced by 4.51/PH/31.
2719 PH/28 Changed -d+all to exclude +memory, because that information is very
2720 rarely of interest, but it makes the output a lot bigger. People tend to
2721 do -d+all out of habit.
2723 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2724 code in os-type was giving problems when libc.so lives in lib64, like on
2727 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2728 aren't the modern standard, and it seems that some systems' include files
2729 don't always have them. Exim was already checking for some of the newer
2730 ones like T_AAAA, and defining it itself. I've added checks for all the
2731 record types that Exim uses.
2733 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2734 not automatically generating a new one, as it is supposed to. This
2735 prevented TLS from working. If the file did exist, but contained invalid
2736 data, a new version was generated, as expected. It was only the case of a
2737 non-existent file that was broken.
2739 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2740 with a change in libdomainkeys > 0.64.
2742 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2743 from DNS. If the selector record carries the flag, it now has
2744 precedence over the domain-wide flag.
2746 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2748 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2749 the use of a port name that isn't defined in /etc/services) occurred, the
2750 message was deferred as in a normal delivery, and thus remained on the
2751 spool, instead of being failed because of the mua_wrapper setting. This
2752 is now fixed, and I tidied up some of the mua_wrapper messages at the
2755 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2756 the messages in a hash of arrays rather than using individual hashes.
2757 This is a bit cleaner and results in dramatic memory savings, albeit
2758 at a slight CPU cost.
2760 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2761 as requested by Marc Sherman.
2763 SC/10 Eximstats: added histograms for user specified patterns as requested
2766 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2768 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2769 fopen() in the content-scanning modules that did not already have it.
2775 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2776 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2778 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2780 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2782 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2783 to test Sieve filters that use "vacation".
2785 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2786 that changes the way the GnuTLS parameters are stored in the cache file.
2787 The new format can be generated externally. For backward compatibility,
2788 if the data in the cache doesn't make sense, Exim assumes it has read an
2789 old-format file, and it generates new data and writes a new file. This
2790 means that you can't go back to an older release without removing the
2793 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2794 work if there are any delivery delays because "one_time" forces the
2795 parent to be marked "delivered", so its unseen clone is never tried
2796 again. For this reason, Exim now forbids the simultaneous setting of
2799 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2800 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2801 entry if you want to know the details. The fix, however, neglected to
2802 consider the case when local delivery batching is involved. The test for
2803 "previously delivered" was not happening when checking to see if an
2804 address could be batched with a previous (undelivered) one; under
2805 certain circumstances this could lead to multiple deliveries to the same
2808 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2809 in its include files, and this causes problems building Exim.
2811 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2812 header_syntax) but Exim was just ignoring anything given after a slash.
2813 In particular, this caused confusion with an attempt to use "verify =
2814 reverse_host_lookup/defer_ok". An error is now given when options are
2815 supplied for verify items that do not have them. (Maybe reverse_host_
2816 lookup should have a defer_ok option, but that's a different point.)
2818 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2819 defined by RFC 821) to 2048, because there were problems with some AUTH
2820 commands, and RFC 1869 says the size should be increased for extended
2821 SMTP commands that take arguments.
2823 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2826 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2827 "unknown" error; now it says that the functionality isn't in the binary.
2829 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2830 an address' error message when a string expansion fails (syntax or
2831 whatever). Otherwise the password may appear in the log. Following change
2832 PH/42 below, there is no longer a chance of it appearing in a bounce
2835 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2837 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2838 of its addresses was ever tried. (Bugzilla bug #2.)
2840 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2841 the result incorrectly in the debug output. (It correctly added a newline
2842 to what was transported.)
2844 TF/01 Added $received_time.
2846 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2847 commented out examples of how to interface to a virus scanner and to
2848 SpamAssassin. Also added commented examples of av_scanner and
2849 spamd_address settings.
2851 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2852 and controls are allowed in which ACLs. There were a couple of minor
2853 errors. Some of the entries in the conditions table (which is a table of
2854 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2855 negation of where the condition IS allowed.
2857 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2859 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2860 header file does not have a version number, so I've had to invent a new
2861 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2862 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2863 radiusclient), but it was contributed by a Radius user.
2865 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2866 files or directories, for OpenSSL.
2868 PH/19 When an Exim process that is running as root has to create an Exim log
2869 file, it does so in a subprocess that runs as exim:exim so as to get the
2870 ownership right at creation (otherwise, other Exim processes might see
2871 the file with the wrong ownership). There was no test for failure of this
2872 fork() call, which would lead to the process getting stuck as it waited
2873 for a non-existent subprocess. Forks do occasionally fail when resources
2874 run out. I reviewed all the other calls to fork(); they all seem to check
2877 PH/20 When checking for unexpected SMTP input at connect time (before writing
2878 the banner), Exim was not dealing correctly with a non-positive return
2879 from the read() function. If the client had disconnected by this time,
2880 the result was a log entry for a synchronization error with an empty
2881 string after "input=" when read() returned zero. If read() returned -1
2882 (an event I could not check), uninitialized data bytes were printed.
2883 There were reports of junk text (parts of files, etc) appearing after
2886 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2888 PH/22 Added support for macro redefinition, and (re)definition in between
2889 driver and ACL definitions.
2891 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2892 forgetting to use the resulting value; it was using the unexpanded value.
2894 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2895 hadn't been configured. The fix is from Juergen Kreileder, who
2896 understands it better than I do:
2898 "Here's what I see happening with three configured cyrus_sasl
2899 authenticators configured (plain, login, cram-md5):
2901 On startup auth_cyrus_sasl_init() gets called for each of these.
2902 This means three calls to sasl_listmech() without a specified mech_list.
2903 => SASL tests which mechs of all available mechs actually work
2904 => three warnings about OTP not working
2905 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2907 With the patch, sasl_listmech() also gets called three times. But now
2908 SASL's mech_list option is set to the server_mech specified in the the
2909 authenticator. Or in other words, the answer from sasl_listmech()
2910 gets limited to just the mech you're testing for (which is different
2912 => the return list contains just 'plain' or 'login', 'cram-md5' or
2913 nothing depending on the value of ob->server_mech.
2915 I've just tested the patch: Authentication still works fine,
2916 unavailable mechs specified in the exim configuration are still
2917 caught, and the auth.log warnings about OTP are gone."
2919 PH/25 When debugging is enabled, the contents of the command line are added
2920 to the debugging output, even when log_selector=+arguments is not
2923 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2924 answer is "GNU", and only if the return is "GNU/something" is the answer
2927 PH/27 $acl_verify_message is now set immediately after the failure of a
2928 verification in an ACL, and so is available in subsequent modifiers. In
2929 particular, the message can be preserved by coding like this:
2931 warn !verify = sender
2932 set acl_m0 = $acl_verify_message
2934 Previously, $acl_verify_message was set only while expanding "message"
2935 and "log_message" when a very denied access.
2937 PH/28 Modified OS/os.c-Linux with
2939 -#ifndef OS_LOAD_AVERAGE
2940 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2942 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2943 nomenclature these days.)
2945 PH/29 Installed patch from the Sieve maintainer that adds the options
2946 sieve_useraddress and sieve_subaddress to the redirect router.
2948 PH/30 In these circumstances:
2949 . Two addresses routed to the same list of hosts;
2950 . First host does not offer TLS;
2951 . First host accepts first address;
2952 . First host gives temporary error to second address;
2953 . Second host offers TLS and a TLS session is established;
2954 . Second host accepts second address.
2955 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2956 and peerdn, if requested) that were in fact used only for the second
2959 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2960 attention to any local part prefix or suffix that was matched by the
2961 router that accepted the address. It now behaves in the same way as it
2962 does for delivery: the affixes are removed from the local part unless
2963 rcpt_include_affixes is set on the transport.
2965 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2966 timeout during the DATA phase of an incoming message.
2968 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2969 applied a patch sanctioned by the Sieve maintainer.
2971 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2972 the uid or gid is negative. A case of a negative gid caused this to be
2973 noticed. The fix allows for either to be negative.
2975 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2976 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2979 PH/36 The change PH/12 above was broken. Fixed it.
2981 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2982 the grounds that routing the same address twice would always produce the
2983 same answer. This might have been true once, but it is certainly no
2984 longer true now. Routing a child address may depend on the previous
2985 routing that produced that child. Some complicated redirection strategies
2986 went wrong when messages had multiple recipients, and made Exim's
2987 behaviour dependent on the order in which the addresses were given.
2989 I have moved the duplicate checking until after the routing is complete.
2990 Exim scans the addresses that are assigned to local and remote
2991 transports, and removes any duplicates. This means that more work will be
2992 done, as duplicates will always all be routed, but duplicates are
2993 presumably rare, so I don't expect this is of any significance.
2995 For deliveries to pipes, files, and autoreplies, the duplicate checking
2996 still happens during the routing process, since they are not going to be
2999 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3000 It corrects a timeout issue with spamd. This is Ian's comment: "The
3001 background is that sometimes spamd either never reads data from a
3002 connection it has accepted, or it never writes response data. The exiscan
3003 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3004 blindly assumes that writes won't block so it may never time out."
3006 PH/39 Allow G after quota size as well as K and M.
3008 PH/40 The value set for $authenticated_id in an authenticator may not contain
3009 binary zeroes or newlines because the value is written to log lines and
3010 to spool files. There was no check on this. Now the value is run through
3011 the string_printing() function so that such characters are converted to
3012 printable escape sequences.
3014 PH/41 $message_linecount is a new variable that contains the total number of
3015 lines in the message. Compare $body_linecount, which is the count for the
3018 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3019 bounce and delay warning messages, except in certain special cases, which
3022 (a) An SMTP error message from a remote host;
3023 (b) A message specified in a :fail: redirection;
3024 (c) A message specified in a "fail" command in a system filter;
3025 (d) A message specified in a FAIL return from the queryprogram router;
3026 (e) A message specified by the cannot_route_message router option.
3028 In these cases only, Exim does include the error details in bounce and
3029 warning messages. There are also a few cases where bland messages such
3030 as "unrouteable address" or "local delivery error" are given.
3032 PH/43 $value is now also set for the "else" part of a ${run expansion.
3034 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3035 being worked on, but at least Exim now implements the latest version to
3038 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3039 process to complete was treated as a delivery failure, a timeout while
3040 writing the message to the pipe was logged, but erroneously treated as a
3041 successful delivery. Such timeouts include transport filter timeouts. For
3042 consistency with the overall process timeout, these timeouts are now
3043 treated as errors, giving rise to delivery failures by default. However,
3044 there is now a new Boolean option for the pipe transport called
3045 timeout_defer, which, if set TRUE, converts the failures into defers for
3046 both kinds of timeout. A transport filter timeout is now identified in
3049 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3050 systems where "make" and "gmake" are different, calling "gmake" at top
3051 level broke things. I've arranged for the value of $(MAKE) to be passed
3052 from the Makefile to this script so that it can call the same version of
3056 A note about Exim versions 4.44 and 4.50
3057 ----------------------------------------
3059 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3060 changes of various kinds. As a consequence, a big documentation update was
3061 needed. This delayed the release for rather longer than seemed good, especially
3062 in the light of a couple of (minor) security issues. Therefore, the changes
3063 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3064 release. So 4.44 and 4.50 are in effect two different branches that both start
3067 I have left the 4.50 change log unchanged; it contains all the changes since
3068 4.43. The change log for 4.44 is below; many of its items are identical to
3069 those for 4.50. This seems to be the most sensible way to preserve the
3070 historical information.
3076 1. Minor wording change to the doc/README.SIEVE file.
3078 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3079 computation of the current number of files was incorrect.
3081 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3082 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3085 4. Give more explanation in the error message when the command for a transport
3086 filter fails to execute.
3088 5. There are several places where Exim runs a non-Exim command in a
3089 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3090 was being done only for the command run by the queryprogram router. It is
3091 now done for all such subprocesses. The other cases are: ${run, transport
3092 filters, and the commands run by the lmtp and pipe transports.
3094 6. Added CONFIGURE_GROUP build-time option.
3096 7. Some older OS have a limit of 256 on the maximum number of file
3097 descriptors. Exim was using setrlimit() to set 1000 as a large value
3098 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3099 systems. I've change it so that if it can't get 1000, it tries for 256.
3101 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3102 was an oversight, and furthermore, ever since the addition of extra
3103 controls (e.g. 4.43/32), the checks on when to allow different forms of
3104 "control" were broken. There should now be diagnostics for all cases when a
3105 control that does not make sense is encountered.
3107 9. Added the /retain_sender option to "control=submission".
3109 10. $recipients is now available in the predata ACL (oversight).
3111 11. Tidy the search cache before the fork to do a delivery from a message
3112 received from the command line. Otherwise the child will trigger a lookup
3113 failure and thereby defer the delivery if it tries to use (for example) a
3114 cached ldap connection that the parent has called unbind on.
3116 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3117 of $address_data from the recipient verification was clobbered by the
3118 sender verification.
3120 13. The value of address_data from a sender verification is now available in
3121 $sender_address_data in subsequent conditions in the ACL statement.
3123 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3125 15. Added a new option "connect=<time>" to callout options, to set a different
3128 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3129 was its contents. (It was OK if the option was not defined at all.)
3131 17. A "Completed" log line is now written for messages that are removed from
3132 the spool by the -Mrm option.
3134 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3135 information about exactly what failed.
3137 19. Added -dd to debug only the daemon process.
3139 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3140 handles timeouts, both on the server side and network timeouts. Renamed the
3141 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3143 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3144 It is now set to "smtps".
3146 22. $host_address is now set to the target address during the checking of
3147 ignore_target_hosts.
3149 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3150 being passed; this would have caused $sender_host_name to have been used if
3151 matching the list had actually called for a host name (not very likely,
3152 since this list is usually IP addresses). A host name is now passed as
3155 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3156 code that specifies a non-restarting handler (typically sigaction() in
3157 modern systems) in an attempt to fix a rare and obscure crash bug.
3159 25. Narrowed the window for a race in the daemon that could cause it to ignore
3160 SIGCHLD signals. This is not a major problem, because they are used only to
3161 wake it up if nothing else does.
3163 26. A malformed maildirsize file could cause Exim to calculate negative values
3164 for the mailbox size or file count. Odd effects could occur as a result.
3165 The maildirsize information is now recalculated if the size or filecount
3168 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3169 support for a long time. Removed HAVE_SYS_VFS_H.
3171 28. Installed the latest version of exipick from John Jetmore.
3173 29. In an address list, if the pattern was not a regular expression, an empty
3174 subject address (from a bounce message) matched only if the pattern was an
3175 empty string. Non-empty patterns were not even tested. This was the wrong
3176 because it is perfectly reasonable to use an empty address as part of a
3177 database query. An empty address is now tested by patterns that are
3178 lookups. However, all the other forms of pattern expect the subject to
3179 contain a local part and a domain, and therefore, for them, an empty
3180 address still always fails if the pattern is not itself empty.
3182 30. Exim went into a mad DNS loop when attempting to do a callout where the
3183 host was specified on an smtp transport, and looking it up yielded more
3184 than one IP address.
3186 31. Re-factored the code for checking spool and log partition space into a
3187 function that finds that data and another that does the check. The former
3188 is then used to implement four new variables: $spool_space, $log_space,
3189 $spool_inodes, and $log_inodes.
3191 32. The RFC2047 encoding function was originally intended for short strings
3192 such as real names; it was not keeping to the 75-character limit for
3193 encoded words that the RFC imposes. It now respects the limit, and
3194 generates multiple encoded words if necessary. To be on the safe side, I
3195 have increased the buffer size for the ${rfc2047: expansion operator from
3198 33. It is now permitted to omit both strings after an "if" condition; if the
3199 condition is true, the result is "true". As before, when the second string
3200 is omitted, a false condition yields an empty string. This makes it less
3201 cumbersome to write custom ACL and router conditions.
3203 34. Failure to deliver a bounce message always caused it to be frozen, even if
3204 there was an errors_to setting on the router. The errors_to setting is now
3207 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3208 canonical form (fully expanded) before being placed in
3209 $sender_host_address.
3211 36. The table in the code that translates DNS record types into text (T_A to
3212 "A" for instance) was missing entries for NS and CNAME. It is just possible
3213 that this could have caused confusion if both these types were looked up
3214 for the same domain, because the text type is used as part of Exim's
3215 per-process caching. But the chance of anyone hitting this buglet seems
3218 37. The dnsdb lookup has been extended in a number of ways.
3220 (1) There is a new type, "zns", which walks up the domain tree until it
3221 finds some nameserver records. It should be used with care.
3223 (2) There is a new type, "mxh", which is like "mx" except that it returns
3224 just the host names, not the priorities.
3226 (3) It is now possible to give a list of domains (or IP addresses) to be
3227 looked up. The behaviour when one of the lookups defers can be
3228 controlled by a keyword.
3230 (4) It is now possible to specify the separator character for use when
3231 multiple records are returned.
3233 38. The dnslists ACL condition has been extended: it is now possible to supply
3234 a list of IP addresses and/or domains to be looked up in a particular DNS
3237 39. Added log_selector=+queue_time_overall.
3239 40. When running the queue in the test harness, wait just a tad after forking a
3240 delivery process, to get repeatability of debugging output.
3242 41. Include certificate and key file names in error message when GnuTLS fails
3243 to set them up, because the GnuTLS error message doesn't include the name
3244 of the failing file when there is a problem reading it.
3246 42. Allow both -bf and -bF in the same test run.
3248 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3250 44. The "Exiscan patch" is now merged into the mainline Exim source.
3252 45. Sometimes the final signoff response after QUIT could fail to get
3253 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3254 < 0 before doing a fflush(). This bug looks as though it goes back to the
3255 introduction of TLS in release 3.20, but "sometimes" must have been rare
3256 because the tests only now provoked it.
3258 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3259 (this can affect the format of dates).
3261 47. exim_tidydb, when checking for the continued existence of a message for
3262 which it has found a message-specific retry record, was not finding
3263 messages that were in split spool directories. Consequently, it was
3264 deleting retry records that should have stayed in existence.
3266 48. Steve fixed some bugs in eximstats.
3268 49. The SPA authentication driver was not abandoning authentication and moving
3269 on to the next authenticator when an expansion was forced to fail,
3270 contradicting the general specification for all authenticators. Instead it
3271 was generating a temporary error. It now behaves as specified.
3273 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3274 (the order specifies the preference for clients). The order is now AES256,
3275 AES128, 3DES, ARCFOUR128.
3277 51. Small patch to Sieve code - explicitly set From: when generating an
3280 52. Exim crashed if a remote delivery caused a very long error message to be
3281 recorded - for instance if somebody sent an entire SpamAssassin report back
3282 as a large number of 550 error lines. This bug was coincidentally fixed by
3283 increasing the size of one of Exim's internal buffers (big_buffer) that
3284 happened as part of the Exiscan merge. However, to be on the safe side, I
3285 have made the code more robust (and fixed the comments that describe what
3288 53. Now that there can be additional text after "Completed" in log lines (if
3289 the queue_time_overall log selector is set), a one-byte patch to exigrep
3290 was needed to allow it to recognize "Completed" as not the last thing in
3293 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3294 patch that reportedly fixes this has been added. I am not expert enough to
3295 create a test for it. This is what the patch creator wrote:
3297 "I found a little strange behaviour of ldap code when working with
3298 Windows 2003 AD Domain, where users was placed in more than one
3299 Organization Units. When I tried to give exim partial DN, the exit code
3300 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3301 But simultaneously result of request was absolutely normal ldap result,
3302 so I produce this patch..."
3304 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3305 REFERENCE, so I have modified the code to exclude the patch when that macro
3308 55. Some experimental protocols are using DNS PTR records for new purposes. The
3309 keys for these records are domain names, not reversed IP addresses. The
3310 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3311 leaves it alone. Component reversal etc. now happens only for IP addresses.
3314 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3316 57. Double the size of the debug message buffer (to 2048) so that more of very
3317 long debug lines gets shown.
3319 58. The exicyclog utility now does better if the number of log files to keep
3320 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3322 59. Two changes related to the smtp_active_hostname option:
3324 (1) $smtp_active_hostname is now available as a variable.
3325 (2) The default for smtp_banner uses $smtp_active_hostname instead
3326 of $primary_hostname.
3328 60. The host_aton() function is supposed to be passed a string that is known
3329 to be a valid IP address. However, in the case of IPv6 addresses, it was
3330 not checking this. This is a hostage to fortune. Exim now panics and dies
3331 if the condition is not met. A case was found where this could be provoked
3332 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3333 components; fortuitously, this particular loophole had already been fixed
3334 by change 4.50/55 above.
3336 If there are any other similar loopholes, the new check in host_aton()
3337 itself should stop them being exploited. The report I received stated that
3338 data on the command line could provoke the exploit when Exim was running as
3339 exim, but did not say which command line option was involved. All I could
3340 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3341 running as the user.
3344 61. There was a buffer overflow vulnerability in the SPA authentication code
3345 (which came originally from the Samba project). I have added a test to the
3346 spa_base64_to_bits() function which I hope fixes it.
3349 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3350 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3352 63. The daemon start-up calls getloadavg() while still root for those OS that
3353 need the first call to be done as root, but it missed one case: when
3354 deliver_queue_load_max is set with deliver_drop_privilege. This is
3355 necessary for the benefit of the queue runner, because there is no re-exec
3356 when deliver_drop_privilege is set.
3358 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3359 This has been fixed.
3361 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3362 was in use, was not putting the data itself into the right store pool;
3363 consequently, it could be overwritten for a subsequent message in the same
3364 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3367 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3369 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3370 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3371 the function were treating the return as a boolean value, which happened to
3372 work because 0=false and not-0=true, but is not correct code.
3374 68. The host_aton() function was not handling scoped IPv6 addresses (those
3375 with, for example, "%eth0" on the end) correctly.
3377 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3378 negated items (that is, ~something) in unsigned ints. Some compilers
3379 apparently mutter when there is no cast.
3381 70. If an address verification called from an ACL failed, and did not produce a
3382 user-specific message (i.e. there was only a "system" message), nothing was
3383 put in $acl_verify_message. In this situation, it now puts the system
3386 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3387 session; change 4.31/43 added the unwanted input to the log line - except
3388 that it did not do this in the start of session case. It now does.
3390 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3391 This is wrong and can cause the other end to generate a synchronization
3392 error if it is another Exim or anything else that does the synchronization
3393 check. A QUIT command is no longer sent after a timeout.
3395 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3396 during host lookups.
3398 74. The defer_ok option of callout verification was not working if it was used
3399 when verifying addresses in header lines, that is, for this case:
3401 verify = header_sender/callout=defer_ok
3403 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3404 those file descriptors could be used for SMTP connections. If anything
3405 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3406 could be sent to the SMTP client, causing chaos. The daemon now opens
3407 stdin, stdout, and stderr to /dev/null when it puts itself into the
3410 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3411 log by default. The user can override this with suitable Perl magic.
3413 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3414 the log message when discard triggers, was not working for the DATA ACL or
3415 for the non-SMTP ACL.
3417 78. Error message wording change in sieve.c.
3419 79. If smtp_accept_max_per_host was set, the number of connections could be
3420 restricted to fewer than expected, because the daemon was trying to set up
3421 a new connection before checking whether the processes handling previous
3422 connections had finished. The check for completed processes is now done
3423 earlier. On busy systems, this bug wouldn't be noticed because something
3424 else would have woken the daemon, and it would have reaped the completed
3427 80. If a message was submitted locally by a user whose login name contained one
3428 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3429 It caused a spool format error. I have fixed the spool reading code. A
3430 related problem was that the "from" clause in the Received: line became
3431 illegal because of the space(s). It is now covered by ${quote_local_part.
3433 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3436 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3438 83. Patch from Sieve maintainer to fix unterminated string problem in
3439 "vacation" handling.
3441 84. Some minor changes to the Linux configuration files to help with other
3442 OS variants using glibc.
3444 85. One more patch for Sieve to update vacation handling to latest spec.
3447 ----------------------------------------------------
3448 See the note above about the 4.44 and 4.50 releases.
3449 ----------------------------------------------------
3455 1. Change 4.43/35 introduced a bug that caused file counts to be
3456 incorrectly computed when quota_filecount was set in an appendfile
3459 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3460 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3463 3. Give more explanation in the error message when the command for a transport
3464 filter fails to execute.
3466 4. There are several places where Exim runs a non-Exim command in a
3467 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3468 was being done only for the command run by the queryprogram router. It is
3469 now done for all such subprocesses. The other cases are: ${run, transport
3470 filters, and the commands run by the lmtp and pipe transports.
3472 5. Some older OS have a limit of 256 on the maximum number of file
3473 descriptors. Exim was using setrlimit() to set 1000 as a large value
3474 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3475 systems. I've change it so that if it can't get 1000, it tries for 256.
3477 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3478 was an oversight, and furthermore, ever since the addition of extra
3479 controls (e.g. 4.43/32), the checks on when to allow different forms of
3480 "control" were broken. There should now be diagnostics for all cases when a
3481 control that does not make sense is encountered.
3483 7. $recipients is now available in the predata ACL (oversight).
3485 8. Tidy the search cache before the fork to do a delivery from a message
3486 received from the command line. Otherwise the child will trigger a lookup
3487 failure and thereby defer the delivery if it tries to use (for example) a
3488 cached ldap connection that the parent has called unbind on.
3490 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3491 of $address_data from the recipient verification was clobbered by the
3492 sender verification.
3494 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3495 was its contents. (It was OK if the option was not defined at all.)
3497 11. A "Completed" log line is now written for messages that are removed from
3498 the spool by the -Mrm option.
3500 12. $host_address is now set to the target address during the checking of
3501 ignore_target_hosts.
3503 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3504 being passed; this would have caused $sender_host_name to have been used if
3505 matching the list had actually called for a host name (not very likely,
3506 since this list is usually IP addresses). A host name is now passed as
3509 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3510 code that specifies a non-restarting handler (typically sigaction() in
3511 modern systems) in an attempt to fix a rare and obscure crash bug.
3513 15. Narrowed the window for a race in the daemon that could cause it to ignore
3514 SIGCHLD signals. This is not a major problem, because they are used only to
3515 wake it up if nothing else does.
3517 16. A malformed maildirsize file could cause Exim to calculate negative values
3518 for the mailbox size or file count. Odd effects could occur as a result.
3519 The maildirsize information is now recalculated if the size or filecount
3522 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3523 support for a long time. Removed HAVE_SYS_VFS_H.
3525 18. Updated exipick to current release from John Jetmore.
3527 19. Allow an empty sender to be matched against a lookup in an address list.
3528 Previously the only cases considered were a regular expression, or an
3531 20. Exim went into a mad DNS lookup loop when doing a callout where the
3532 host was specified on the transport, if the DNS lookup yielded more than
3535 21. The RFC2047 encoding function was originally intended for short strings
3536 such as real names; it was not keeping to the 75-character limit for
3537 encoded words that the RFC imposes. It now respects the limit, and
3538 generates multiple encoded words if necessary. To be on the safe side, I
3539 have increased the buffer size for the ${rfc2047: expansion operator from
3542 22. Failure to deliver a bounce message always caused it to be frozen, even if
3543 there was an errors_to setting on the router. The errors_to setting is now
3546 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3547 canonical form (fully expanded) before being placed in
3548 $sender_host_address.
3550 24. Updated eximstats to version 1.33
3552 25. Include certificate and key file names in error message when GnuTLS fails
3553 to set them up, because the GnuTLS error message doesn't include the name
3554 of the failing file when there is a problem reading it.
3556 26. Expand error message when OpenSSL has problems setting up cert/key files.
3559 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3560 (this can affect the format of dates).
3562 28. exim_tidydb, when checking for the continued existence of a message for
3563 which it has found a message-specific retry record, was not finding
3564 messages that were in split spool directories. Consequently, it was
3565 deleting retry records that should have stayed in existence.
3567 29. eximstats updated to version 1.35
3568 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3569 1.35 - bugfix such that pie charts by volume are generated correctly
3571 30. The SPA authentication driver was not abandoning authentication and moving
3572 on to the next authenticator when an expansion was forced to fail,
3573 contradicting the general specification for all authenticators. Instead it
3574 was generating a temporary error. It now behaves as specified.
3576 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3577 (the order specifies the preference for clients). The order is now AES256,
3578 AES128, 3DES, ARCFOUR128.
3580 31. Small patch to Sieve code - explicitly set From: when generating an
3583 32. Exim crashed if a remote delivery caused a very long error message to be
3584 recorded - for instance if somebody sent an entire SpamAssassin report back
3585 as a large number of 550 error lines. This bug was coincidentally fixed by
3586 increasing the size of one of Exim's internal buffers (big_buffer) that
3587 happened as part of the Exiscan merge. However, to be on the safe side, I
3588 have made the code more robust (and fixed the comments that describe what
3591 33. Some experimental protocols are using DNS PTR records for new purposes. The
3592 keys for these records are domain names, not reversed IP addresses. The
3593 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3594 leaves it alone. Component reversal etc. now happens only for IP addresses.
3597 34. The host_aton() function is supposed to be passed a string that is known
3598 to be a valid IP address. However, in the case of IPv6 addresses, it was
3599 not checking this. This is a hostage to fortune. Exim now panics and dies
3600 if the condition is not met. A case was found where this could be provoked
3601 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3602 components; fortuitously, this particular loophole had already been fixed
3603 by change 4.50/55 or 4.44/33 above.
3605 If there are any other similar loopholes, the new check in host_aton()
3606 itself should stop them being exploited. The report I received stated that
3607 data on the command line could provoke the exploit when Exim was running as
3608 exim, but did not say which command line option was involved. All I could
3609 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3610 running as the user.
3613 35. There was a buffer overflow vulnerability in the SPA authentication code
3614 (which came originally from the Samba project). I have added a test to the
3615 spa_base64_to_bits() function which I hope fixes it.
3618 36. The daemon start-up calls getloadavg() while still root for those OS that
3619 need the first call to be done as root, but it missed one case: when
3620 deliver_queue_load_max is set with deliver_drop_privilege. This is
3621 necessary for the benefit of the queue runner, because there is no re-exec
3622 when deliver_drop_privilege is set.
3624 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3625 was in use, was not putting the data itself into the right store pool;
3626 consequently, it could be overwritten for a subsequent message in the same
3627 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3630 38. Sometimes the final signoff response after QUIT could fail to get
3631 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3632 < 0 before doing a fflush(). This bug looks as though it goes back to the
3633 introduction of TLS in release 3.20, but "sometimes" must have been rare
3634 because the tests only now provoked it.
3640 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3641 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3642 Now it returns an integer. A number of calls were still expecting a T/F
3643 return. Fortuitously, in all cases, the tests worked in OK situations,
3644 which is the norm. However, things would have gone wrong on any write
3645 failures on the smtp file descriptor. This function is used when sending
3646 messages over SMTP and also when doing verify callouts.
3648 2. When Exim is called to do synchronous delivery of a locally submitted
3649 message (the -odf or -odi options), it no longer closes stderr before doing
3652 3. Implemented the mua_wrapper option.
3654 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3656 5. Implemented the functions header_remove(), header_testname(),
3657 header_add_at_position(), and receive_remove_recipient(), and exported them
3660 6. If an ACL "warn" statement specified the addition of headers, Exim already
3661 inserted X-ACL-Warn: at the start if there was no header name. However, it
3662 was not making this test for the second and subsequent header lines if
3663 there were newlines in the string. This meant that an invalid header could
3664 be inserted if Exim was badly configured.
3666 7. Allow an ACL "warn" statement to add header lines at the start or after all
3667 the Received: headers, as well as at the end.
3669 8. Added the rcpt_4xx retry error code.
3671 9. Added postmaster_mailfrom=xxx to callout verification option.
3673 10. Added mailfrom=xxxx to the callout verification option, for verify=
3676 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3677 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3679 12. Inserted some casts to stop certain compilers warning when using pointer
3680 differences as field lengths or precisions in printf-type calls (mostly
3681 affecting debugging statements).
3683 13. Added optional readline() support for -be (dynamically loaded).
3685 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3686 same clock tick as a message's arrival, so that its received time was the
3687 same as the "first fail" time on the retry record, and that message
3688 remained on the queue past the ultimate address timeout, every queue runner
3689 would try a delivery (because it was past the ultimate address timeout) but
3690 after another failure, the ultimate address timeout, which should have then
3691 bounced the address, did not kick in. This was a "< instead of <=" error;
3692 in most cases the first failure would have been in the next clock tick
3693 after the received time, and all would be well.
3695 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3696 being recognized when the domain list was tested by the match_domain
3697 condition in an expansion string.
3699 16. Added the ${str2b64: operator.
3701 17. Exim was always calling setrlimit() to set a large limit for the number of
3702 processes, without checking whether the existing limit was already
3703 adequate. (It did check for the limit on file descriptors.) Furthermore,
3704 errors from getrlimit() and setrlimit() were being ignored. Now they are
3705 logged to the main and panic logs, but Exim does carry on, to try to do its
3706 job under whatever limits there are.
3708 18. Imported PCRE 5.0.
3710 19. Trivial typo in log message " temporarily refused connection" (the leading
3713 20. If the log selector return_path_on_delivery was set and an address was
3714 redirected to /dev/null, the delivery process crashed because it assumed
3715 that a return path would always be set for a "successful" delivery. In this
3716 case, the whole delivery is bypassed as an optimization, and therefore no
3719 21. Internal re-arrangement: the function for sending a challenge and reading
3720 a response while authentication was assuming a zero-terminated challenge
3721 string. It's now changed to take a pointer and a length, to allow for
3722 binary data in such strings.
3724 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3726 23. Exim was not respecting finduser_retries when seeking the login of the
3727 uid under which it was called; it was always trying 10 times. (The default
3728 setting of finduser_retries is zero.) Also, it was sleeping after the final
3729 failure, which is pointless.
3731 24. Implemented tls_on_connect_ports.
3733 25. Implemented acl_smtp_predata.
3735 26. If the domain in control=submission is set empty, Exim assumes that the
3736 authenticated id is a complete email address when it generates From: or
3737 Sender: header lines.
3739 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3740 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3741 chown and chgrp in /bin and hostname in /usr/bin.
3743 28. Exim was keeping the "process log" file open after each use, just as it
3744 does for the main log. This opens the possibility of it remaining open for
3745 long periods when the USR1 signal hits a daemon. Occasional processlog
3746 errors were reported, that could have been caused by this. Anyway, it seems
3747 much more sensible not to leave this file open at all, so that is what now
3750 29. The long-running daemon process does not normally write to the log once it
3751 has entered its main loop, and it closes the log before doing so. This is
3752 so that log files can straightforwardly be renamed and moved. However,
3753 there are a couple of unusual error situations where the daemon does write
3754 log entries, and I had neglected to close the log afterwards.
3756 30. The text of an SMTP error response that was received during a remote
3757 delivery was being truncated at 512 bytes. This is too short for some of
3758 the long messages that one sometimes sees. I've increased the limit to
3761 31. It is now possible to make retry rules that apply only when a message has a
3762 specific sender, in particular, an empty sender.
3764 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3765 it possible to be selective about when SMTP synchronization is enforced.
3767 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3769 32. Implemented hosts_connection_nolog.
3771 33. Added an ACL for QUIT.
3773 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3776 35. Added mailbox_size and mailbox_filecount to appendfile.
3778 36. Added control = no_multiline_responses to ACLs.
3780 37. There was a bug in the logic of the code that waits for the clock to tick
3781 in the case where the clock went backwards by a substantial amount such
3782 that the microsecond fraction of "now" was more than the microsecond
3783 fraction of "then" (but the whole seconds number was less).
3785 38. Added support for the libradius Radius client library this is found on
3786 FreeBSD (previously only the radiusclient library was supported).
3792 1. When certain lookups returned multiple values in the form name=value, the
3793 quoting of the values was not always being done properly. Specifically:
3794 (a) If the value started with a double quote, but contained no whitespace,
3796 (b) If the value contained whitespace other than a space character (i.e.
3797 tabs or newlines or carriage returns) it was not quoted.
3798 This fix has been applied to the mysql and pgsql lookups by writing a
3799 separate quoting function and calling it from the lookup code. The fix
3800 should probably also be applied to nisplus, ibase and oracle lookups, but
3801 since I cannot test any of those, I have not disturbed their existing code.
3803 2. A hit in the callout cache for a specific address caused a log line with no
3804 reason for rejecting RCPT. Now it says "Previous (cached) callout
3805 verification failure".
3807 3. There was an off-by-one bug in the queryprogram router. An over-long
3808 return line was truncated at 256 instead of 255 characters, thereby
3809 overflowing its buffer with the terminating zero. As well as fixing this, I
3810 have increased the buffer size to 1024 (and made a note to document this).
3812 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3813 when Exim is waiting for an SMTP response from a remote server, Exim
3814 restarts its select() call on the socket, thereby resetting its timeout.
3815 This is not a problem when such interrupts are rare. Somebody set up a cron
3816 job to run exiwhat every 2 minutes, which is less than the normal select()
3817 timeout (5 or 10 minutes). This meant that the select() timeout never
3818 kicked in because it was always reset. I have fixed this by comparing the
3819 time when an interrupt arrives with the time at the start of the first call
3820 to select(). If more time than the timeout has elapsed, the interrupt is
3821 treated as a timeout.
3823 5. Some internal re-factoring in preparation for the addition of Sieve
3824 extensions (by MH). In particular, the "personal" test is moved to a
3825 separate function, and given an option for scanning Cc: and Bcc: (which is
3826 not set for Exim filters).
3828 6. When Exim created an email address using the login of the caller as the
3829 local part (e.g. when creating a From: or Sender: header line), it was not
3830 quoting the local part when it contained special characters such as @.
3832 7. Installed new OpenBSD configuration files.
3834 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3835 try to make them clearer.
3837 9. Callout options, other than the timeout value, were being ignored when
3838 verifying sender addresses in header lines. For example, when using
3840 verify = header_sender/callout=no_cache
3842 the cache was (incorrectly) being used.
3844 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3845 only the Cygwin environment.
3847 11. When return_path_on_delivery was set as a log selector, if different remote
3848 addresses in the same message used different return paths and parallel
3849 remote delivery occurred, the wrong values would sometimes be logged.
3850 (Whenever a remote delivery process finished, the return path value from
3851 the most recently started remote delivery process was logged.)
3853 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3854 lines when AUTH and/or TLS are in use. This is the "received protocol"
3855 field. Exim used to use "asmtp" for authenticated SMTP, without any
3856 indication (in the protocol name) for TLS use. Now it follows the RFC and
3857 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3858 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3859 names appear in log lines as well as in Received: header lines.
3861 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3862 extensions, and comparison tests, and to fix some bugs.
3864 14. Changes to the "personal" filter test:
3866 (1) The test was buggy in that it was just doing the equivalent of
3867 "contains" tests on header lines. For example, if a user's address was
3868 anne@some.where, the "personal" test would incorrectly be true for
3870 To: susanne@some.where
3872 This test is now done by extracting each address from the header in turn,
3873 and checking the entire address. Other tests that are part of "personal"
3874 are now done using regular expressions (for example, to check local parts
3875 of addresses in From: header lines).
3877 (2) The list of non-personal local parts in From: addresses has been
3878 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3879 taken from the Sieve specification recommendations.
3881 (3) If the message contains any header line starting with "List-" it is
3882 treated as non-personal.
3884 (4) The test for "circular" in the Subject: header line has been removed
3885 because it now seems ill-conceived.
3887 15. Minor typos in src/EDITME comments corrected.
3889 16. Installed latest exipick from John Jetmore.
3891 17. If headers_add on a router specified a text string that was too long for
3892 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3893 of string_sprintf() is now avoided.
3895 18. $message_body_size was not set (it was always zero) when running the DATA
3896 ACL and the local_scan() function.
3898 19. For the "mail" command in an Exim filter, no default was being set for
3899 the once_repeat time, causing a random time value to be used if "once" was
3900 specified. (If the value happened to be <= 0, no repeat happened.) The
3901 default is now 0s, meaning "never repeat". The "vacation" command was OK
3902 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3903 (I found it when inspecting the code).
3905 20. There is now an overall timeout for performing a callout verification. It
3906 defaults to 4 times the callout timeout, which applies to individual SMTP
3907 commands during the callout. The overall timeout applies when there is more
3908 than one host that can be tried. The timeout is checked before trying the
3909 next host. This prevents very long delays if there are a large number of
3910 hosts and all are timing out (e.g. when the network connections are timing
3911 out). The value of the overall timeout can be changed by specifying an
3912 additional sub-option for "callout", called "maxwait". For example:
3914 verify = sender/callout=5s,maxwait=20s
3916 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3917 to the end before writing, but this should make it even safer).
3919 22. Exim was forgetting that it had advertised PIPELINING for the second and
3920 subsequent messages on an SMTP connection. It was also not resetting its
3921 memory on STARTTLS and an internal HELO.
3923 23. When Exim logs an SMTP synchronization error within a session, it now
3924 records whether PIPELINING has been advertised or not.
3926 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3927 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3928 rather than long int.
3930 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3932 26. Added the never_mail option to autoreply.
3938 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3939 crash if the getsockname() call failed; this can happen if a connection is
3940 closed very soon after it is established. The problem was simply in the
3941 order in which certain operations were done, causing Exim to try to write
3942 to the SMTP stream before it had set up the file descriptor. The bug has
3943 been fixed by making things happen in the correct order.
3949 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3950 before the connection was closed, thus losing the rejection response.
3952 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3953 some early Solaris releases, but causes trouble in current releases where
3954 socklen_t is defined.
3956 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3959 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3962 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3963 that releasing the top of it at the end releases what was used for sub-
3964 expansions (unless the block got too big). However, discard this block if
3965 the first thing is a variable or header, so that we can use its block when
3966 it is dynamic (useful for very large $message_headers, for example).
3968 6. Lookups now cache *every* query, not just the most recent. A new, separate
3969 store pool is used for this. It can be recovered when all lookup caches are
3970 flushed. Lookups now release memory at the end of their result strings.
3971 This has involved some general refactoring of the lookup sources.
3973 7. Some code has been added to the store_xxx() functions to reduce the amount
3974 of flapping under certain conditions.
3976 8. log_incoming_interface used to affect only the <= reception log lines. Now
3977 it causes the local interface and port to be added to several more SMTP log
3978 lines, for example "SMTP connection from", and rejection lines.
3980 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3982 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3984 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3985 could be overwritten at the end of the current message (or the start of a
3986 new message if it was set in a HELO ACL). The value is now preserved for
3987 the duration of the SMTP connection.
3989 12. If a transport had a headers_rewrite setting, and a matching header line
3990 contained an unqualified address, that address was qualified, even if it
3991 did not match any rewriting rules. The underlying bug was that the values
3992 of the flags that permit the existence of unqualified sender and recipient
3993 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3994 non-local messages, and by -bnq for local messages) were not being
3995 preserved with the message after it was received.
3997 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3998 "next input=" as part of the text comprising the host identity instead of
3999 the correct text. The code was using the same buffer for two different
4000 strings. However, depending on which order the printing function evaluated
4001 its arguments, the bug did not always show up. Under Linux, for example, my
4002 test suite worked just fine.
4004 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4005 doesn't work with some older versions of Perl. It has been changed to "my",
4006 which in any case is probably the better facility to use.
4008 15. A really picky compiler found some instances of statements for creating
4009 error messages that either had too many or two few arguments for the format
4012 16. The size of the buffer for calls to the DNS resolver has been increased
4013 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4014 for addresses that have a lot of PTR records. This alleviates a problem; it
4015 does not fully solve it.
4017 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4018 buffer now truncates the list and logs the incident, which is the same
4019 action as happens when Exim is looking up a host name and its aliases.
4020 Previously in this situation something unpredictable would happen;
4021 sometimes it was "internal error: store_reset failed".
4023 18. If a server dropped the connection unexpectedly when an Exim client was
4024 using GnuTLS and trying to read a response, the client delivery process
4025 crashed while trying to generate an error log message.
4027 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4028 string, for example:
4030 warn message = H1: something\nH2: something
4032 the text was added as a single header line from Exim's point of view
4033 though it ended up OK in the delivered message. However, searching for the
4034 second and subsequent header lines using $h_h2: did not work. This has been
4035 fixed. Similarly, if a system filter added multiple headers in this way,
4036 the routers could not see them.
4038 20. Expanded the error message when iplsearch is called with an invalid key to
4039 suggest using net-iplsearch in a host list.
4041 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4042 ACLs are no longer actually imposed (and a message to that effect is
4045 22. If a "gecos" field in a passwd entry contained escaped characters, in
4046 particular, if it contained a \" sequence, Exim got it wrong when building
4047 a From: or a Sender: header from that name. A second bug also caused
4048 incorrect handling when an unquoted " was present following a character
4049 that needed quoting.
4051 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4052 was not being matched caselessly.
4054 24. Arranged for all hyphens in the exim.8 source to be escaped with
4057 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4058 properly. Recipient callout cache records were still being keyed to include
4059 the sender, even when use_sender was set false. This led to far more
4060 callouts that were necessary. The sender is no longer included in the key
4061 when use_sender is false.
4063 26. Added "control = submission" modifier to ACLs.
4065 27. Added the ${base62d: operator to decode base 62 numbers.
4067 28. dnsdb lookups can now access SRV records.
4069 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4070 the configuration file.
4072 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4073 (-v) mode. This makes the output for a verbose queue run more intelligible.
4075 31. Added a use_postmaster feature to recipient callouts.
4077 32. Added the $body_zerocount variable, containing the number of binary zero
4078 bytes in the message body.
4080 33. The time of last modification of the "new" subdirectory is now used as the
4081 "mailbox time last read" when there is a quota error for a maildir
4084 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4086 35. Added +ignore_unknown as a special item in host lists.
4088 36. Code for decoding IPv6 addresses in host lists is now included, even if
4089 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4090 address was recognized as an IP address, but was then not correctly decoded
4091 into binary, causing unexpected and incorrect effects when compared with
4098 1. Very minor rewording of debugging text in manualroute to say "list of
4099 hosts" instead of "hostlist".
4101 2. If verify=header_syntax was set, and a header line with an unqualified
4102 address (no domain) and a large number of spaces between the end of the
4103 name and the colon was received, the reception process suffered a buffer
4104 overflow, and (when I tested it) crashed. This was caused by some obsolete
4105 code that should have been removed. The fix is to remove it!
4107 3. When running in the test harness, delay a bit after writing a bounce
4108 message to get a bit more predictability in the log output.
4110 4. Added a call to search_tidyup() just before forking a reception process. In
4111 theory, someone could use a lookup in the expansion of smtp_accept_max_
4112 per_host which, without the tidyup, could leave open a database connection.
4114 5. Added the variables $recipient_data and $sender_data which get set from a
4115 lookup success in an ACL "recipients" or "senders" condition, or a router
4116 "senders" option, similar to $domain_data and $local_part_data.
4118 6. Moved the writing of debug_print from before to after the "senders" test
4121 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4122 problems for message scanning, either using a data ACL, or using
4123 local_scan() because the Received: header was not generated till after they
4124 were called (in order to set the time as the time of reception completion).
4125 I have revised the way this works. The header is now generated after the
4126 body is received, but before the ACL or local_scan() are called. After they
4127 are run, the timestamp in the header is updated.
4133 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4134 before starting a queue runner without re-exec. This happened only when
4135 deliver_drop_privilege was set or when the Exim user was set to root. The
4136 effect of the bug was that timeouts during subsequent deliveries caused
4137 crashes instead of being properly handled. The handler is now left at its
4138 default (and expected) setting.
4140 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4141 message, again when deliver_drop_privilege is set or Exim is run as root.
4142 The bug described in (1) was not present in this case, but the tidying up
4143 of the other signals was missing. I have made the two cases consistent.
4145 3. The ignore_target_hosts setting on a manualroute router was being ignored
4146 for hosts that were looked up using the /MX notation.
4148 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4151 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4152 operated on the sender address. After changing the $sender_address to <>
4153 for the sender address verify, Exim was re-instated it as the original
4154 (before rewriting) address, but remembering that it had rewritten it, so it
4155 wasn't rewriting it again. This bug also had the effect of breaking the
4156 sender address verification caching when the sender address was rewritten.
4158 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4159 This has been changed so that if the ip literal address matches
4160 ignore_target_hosts, the router declines.
4162 7. Added expansion conditions match_domain, match_address, and match_local_
4163 part (NOT match_host).
4165 8. The placeholder for the Received: header didn't have a length field set.
4167 9. Added code to Exim itself and to exim_lock to test for a specific race
4168 condition that could lead to file corruption when using MBX delivery. The
4169 issue is with the lockfile that is created in /tmp. If this file is removed
4170 after a process has opened it but before that process has acquired a lock,
4171 there is the potential for a second process to recreate the file and also
4172 acquire a lock. This could lead to two Exim processes writing to the file
4173 at the same time. The added code performs the same test as UW imapd; it
4174 checks after acquiring the lock that its file descriptor still refers to
4175 the same named file.
4177 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4178 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4181 11. Added the smtp_active_hostname option. If used, this will typically be made
4182 to depend on the incoming interface address. Because $interface_address is
4183 not set up until the daemon has forked a reception process, error responses
4184 that can happen earlier (such as "too many connections") no longer contain
4187 12. If an expansion in a condition on a "warn" statement fails because a lookup
4188 defers, the "warn" statement is abandoned, and the next ACL statement is
4189 processed. Previously this caused the whole ACL to be aborted.
4191 13. Added the iplsearch lookup type.
4193 14. Added ident_timeout as a log selector.
4195 15. Added tls_certificate_verified as a log selector.
4197 16. Added a global option tls_require_ciphers (compare the smtp transport
4198 option of the same name). This controls incoming TLS connections.
4200 17. I finally figured out how to make tls_require_ciphers do a similar thing
4201 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4202 before starting the TLS session.
4204 18. Tabs are now shown as \t in -bP output.
4206 19. If the log selector return_path_on_delivery was set, Exim crashed when
4207 bouncing a message because it had too many Received: header lines.
4209 20. If two routers both had headers_remove settings, and the first one included
4210 a superfluous trailing colon, the final name in the first list and the
4211 first name in the second list were incorrectly joined into one item (with a
4212 colon in the middle).
4218 1. Added -C and -D options to the exinext utility, mainly to make it easier
4219 to include in the automated testing, but these could be helpful when
4220 multiple configurations are in use.
4222 2. The exinext utility was not formatting the output nicely when there was
4223 an alternate port involved in the retry record key, nor when there was a
4224 message id as well (for retries that were specific to a specific message
4225 and a specific host). It was also confused by IPv6 addresses, because of
4226 the additional colons they contain. I have fixed the IPv4 problem, and
4227 patched it up to do a reasonable job for IPv6.
4229 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4230 delivery, the log line now contains "pipelined" if PIPELINING was used.
4232 4. An SMTP transport process used to panic and die if the bind() call to set
4233 an explicit outgoing interface failed. This has been changed; it is now
4234 treated in the same way as a connect() failure.
4236 5. A reference to $sender_host_name in the part of a conditional expansion
4237 that was being skipped was still causing a DNS lookup. This no longer
4240 6. The def: expansion condition was not recognizing references to header lines
4241 that used bh_ and bheader_.
4243 7. Added the _cache feature to named lists.
4245 8. The code for checking quota_filecount in the appendfile transport was
4246 allowing one more file than it should have been.
4248 9. For compatibility with Sendmail, the command line option
4256 and sets the incoming protocol and host name (for trusted callers). The
4257 host name and its colon can be omitted when only the protocol is to be set.
4258 Note the Exim already has two private options, -pd and -ps, that refer to
4259 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4260 "s", but I don't think that's a major issue.
4262 10. A number of refactoring changes to the code, none of which should affect
4265 (a) The number of logging options was getting close to filling up the
4266 32-bit word that was used as a bit map. I have split them into two classes:
4267 those that are passed in the argument to log_write(), and those that are
4268 only ever tested independently outside of that function. These are now in
4269 separate 32-bit words, so there is plenty of room for expansion again.
4270 There is no change in the user interface or the logging behaviour.
4272 (b) When building, for example, log lines, the code previously used a
4273 macro that called string_cat() twice, in order to add two strings. This is
4274 not really sufficiently general. Furthermore, there was one instance where
4275 it was actually wrong because one of the argument was used twice, and in
4276 one call a function was used. (As it happened, calling the function twice
4277 did not affect the overall behaviour.) The macro has been replaced by a
4278 function that can join an arbitrary number of extra strings onto a growing
4281 (c) The code for expansion conditions now uses a table and a binary chop
4282 instead of a serial search (which was left over from when there were very
4283 few conditions). Also, it now recognizes conditions like "pam" even when
4284 the relevant support is not compiled in: a suitably worded error message is
4285 given if an attempt is made to use such a condition.
4287 11. Added ${time_interval:xxxxx}.
4289 12. A bug was causing one of the ddress fields not to be passed back correctly
4290 from remote delivery subprocesses. The field in question was not being
4291 subsequently used, so this caused to problems in practice.
4293 13. Added new log selectors queue_time and deliver_time.
4295 14. Might have fixed a bug in maildirsizefile handling that threw up
4296 "unexpected character" debug warnings, and recalculated the data
4297 unnecessarily. In any case, I expanded the warning message to give more
4300 15. Added the message "Restricted characters in address" to the statements in
4301 the default ACL that block characters like @ and % in local parts.
4303 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4304 Three changes have been made:
4306 (a) There was a serious bug; a negative response to MAIL caused the whole
4307 recipient domain to be cached as invalid, thereby blocking all messages
4308 to all local parts at the same domain, from all senders. This bug has
4309 been fixed. The domain is no longer cached after a negative response to
4310 MAIL if the sender used is not empty.
4312 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4315 (c) A new callout option, "use_sender" has been added for people who want
4316 the modified behaviour.
4322 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4325 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4326 indeed breaks things for older releases.
4328 3. Added additional logging to the case where there is a problem reading data
4329 from a filter that is running in a subprocess using a pipe, in order to
4330 try to track down a specific problem.
4332 4. Testing facility fudge: when running in the test harness and attempting
4333 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4334 getting "No route to host". Convert this to a timeout.
4336 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4339 6. Some OS don't have socklen_t but use size_t instead. This affects the
4340 fifth argument of getsockopt() amongst other things. This is now
4341 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4342 can be set for individual OS. I have set it for SunOS5, OSF1, and
4343 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4344 some earlier ones do not.
4346 7. Change 4.30/15 was not doing the test caselessly.
4348 8. The standard form for an IPv6 address literal was being rejected by address
4349 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4350 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4351 this, as well as the form without the "IPv6" on the front (but only when
4352 address literals are enabled, of course).
4354 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4356 10. Exim crashed if a message with an empty sender address specified by -f
4357 encountered a router with an errors_to setting. This could be provoked only
4358 by a command such as
4362 where an empty string was supplied; "<>" did not hit this bug.
4364 11. Installed PCRE release 4.5.
4366 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4367 remained set. It is now erased.
4369 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4370 times from message ids (which are base 36 rather than the normal 62).
4372 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4373 were being counted as actual protocol errors, and logged if the log
4374 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4375 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4376 and DATA following a set of rejected RCPTs do not count as protocol errors.
4377 In other words, Exim assumes they were pipelined, though this may not
4378 actually be the case. Of course, in all cases the client gets an
4379 appropriate error code.
4381 15. If a lookup fails in an ACL condition, a message about the failure may
4382 be available; it is used if testing the ACL cannot continue, because most
4383 such messages specify what the cause of the deferral is. However, some
4384 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4385 that caused an old message to be retained and used if a later statement
4386 caused a defer, replacing the real cause of the deferral.
4388 16. If an IP address had so many PTR records that the DNS lookup buffer
4389 was not large enough to hold them, Exim could crash while trying to process
4390 the truncated data. It now detects and logs this case.
4392 17. Further to 4.21/58, another change has been made: if (and only if) the
4393 first line of a message (the first header line) ends with CRLF, a bare LF
4394 in a subsequent header line has a space inserted after it, so as not to
4395 terminate the header.
4397 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4398 unnecessarily, used atoi() instead of strtol(), and didn't check the
4399 termination when getting file sizes from file names by regex.
4401 19. Completely re-implemented the support for maildirsize files, in the light
4402 of a number of problems with the previous contributed implementation
4403 (4.30/29). In particular:
4405 . If the quota is zero, the maildirsize file is maintained, but no quota is
4408 . If the maildir directory does not exist, it is created before any attempt
4409 to write a maildirsize file.
4411 . The quota value in the file is just a cache; if the quota is changed in
4412 the transport, the new value overrides.
4414 . A regular expression is available for excluding directories from the
4417 20. The autoreply transport checks the characters in options that define the
4418 message's headers; it allows continued headers, but it was checking with
4419 isspace() after an embedded newline instead of explicitly looking for a
4422 21. If all the "regular" hosts to which an address was routed had passed their
4423 expiry times, and had not reached their retry times, the address was
4424 bounced, even if fallback hosts were defined. Now Exim should go on to try
4427 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4428 equivalent code in the SMTP transport. Some hosts send humungous responses
4429 to HELO/EHLO, more than 1024 it seems.
4431 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4432 gives compiler warnings in some environments. I've now done it "properly",
4435 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4436 (because of problems with the built-in one) was declared to return uschar *
4437 instead of char *, causing compiler failure.
4439 25. Fixed a file descriptor leak when processing alias/forward files.
4441 26. Fixed a minor format string issue in dbfn.c.
4443 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4445 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4446 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4449 29. When a sender address is verified, it is cached, to save repeating the test
4450 when there is more than one recipient in a message. However, when the
4451 verification involves a callout, it is possible for different callout
4452 options to be set for different recipients. It is too complicated to keep
4453 track of this in the cache, so now Exim always runs a verification when a
4454 callout is required, relying on the callout cache for the optimization.
4455 The overhead is duplication of the address routing, but this should not be
4458 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4459 to be verified with callout=postmaster, and the main callout worked but the
4460 postmaster check failed, the verification correctly failed. However, if a
4461 subsequent RCPT command asked for sender verification *without* the
4462 postmaster check, incorrect caching caused this verification also to fail,
4465 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4466 it was not caching the DNS options (qualify_single, search_parents) that
4467 were used when the lookup failed. A subsequent lookup with different
4468 options therefore always gave the same answer, though there were cases
4469 where it should not have. (Example: a "domains = !$mx_any" option on a
4470 dnslookup router: the "domains" option is always processed without any
4471 widening, but the router might have qualify_single set.) Now Exim uses the
4472 cached value only when the same options are set.
4474 32. Added John Jetmore's "exipick" utility to the distribution.
4476 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4477 than a timeout (e.g. a certificate is required, and is not provided), an
4478 Exim server now closes the connection immediately. Previously it waited for
4479 the client to close - but if the client is SSL, it seems that they each
4480 wait for each other, leading to a delay before one of them times out.
4482 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4483 maintained 0.8.x compatibility because I don't think many are using it, and
4484 it is clearly obsolete.
4486 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4489 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4490 client certificate was expired. A simple patch fixes this, though I don't
4491 understand the full logic of why the verify callback is called multiple
4494 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4495 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4496 which causes problems with some clients (such as the Certicom SSL Plus
4497 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4498 disables the coutermeasure allowing Eudora to connect."
4500 38. Exim was not checking that a write() to a log file succeeded. This could
4501 lead to Bad Things if a log got too big, in particular if it hit a file
4502 size limit. Exim now panics and dies if it cannot write to a log file, just
4503 as it does if it cannot open a log file.
4505 39. Modified OS/Makefile-Linux so that it now contains
4507 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4509 The two -D definitions ensure that Exim is compiled with large file
4510 support, which makes it possible to handle log files that are bigger than
4513 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4514 instance) a domain was checked against a named list that involved a lookup,
4515 causing $domain_data to be set, then another domain was checked against the
4516 same list, then the first domain was re-checked, the value of $domain_data
4517 after the final check could be wrong. In particular, if the second check
4518 failed, it could be set empty. This bug probably also applied to
4521 41. The strip_trailing_dot option was not being applied to the address given
4522 with the -f command-line option.
4524 42. The code for reading a message's header from the spool was incrementing
4525 $received_count, but never initializing it. This meant that the value was
4526 incorrect (doubled) while delivering a message in the same process in which
4527 it was received. In the most common configuration of Exim, this never
4528 happens - a fresh exec is done - but it can happen when
4529 deliver_drop_privilege is set.
4531 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4532 it now includes up to 150 characters of the unexpected data in the log
4535 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4536 and building data strings. The size of both of these buffers was 10 000
4537 bytes - far larger than anybody would *ever* want, thought I. Needless to
4538 say, somebody hit the limit. I have increased the maximum line length to
4539 20 000 and the maximum data length of concatenated lines to 100 000. I have
4540 also fixed two bugs, because there was no checking on these buffers. Tsk,
4541 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4542 buffer is too small.
4544 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4545 lsearch lookups. Now it does.
4547 46. When parsing a route_list item in a manualroute router, a fixed-length
4548 buffer was used for the list of hosts. I made this 1024 bytes long,
4549 thinking that nobody would ever have a list of hosts that long. Wrong.
4550 Somebody had a whole pile of complicated expansion conditions, and the
4551 string was silently truncated, leading to an expansion error. It turns out
4552 that it is easier to change to an unlimited length (owing to other changes
4553 that have happened since this code was originally written) than to build
4554 structure for giving a limitation error. The length of the item that
4555 expands into the list of hosts is now unlimited.
4557 47. The lsearch lookup could not handle data where the length of text line was
4558 more than 4095 characters. Such lines were truncated, leading to shortened
4559 data being returned. It should now handle lines of any length.
4561 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4562 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4565 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4566 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4567 no longer happens in comment lines. A list of replacements is now placed
4568 at the head of all of the source files, except those whose only change is
4569 to replace PERL_COMMAND in the very first #! line.
4571 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4572 messages on the queue, with a bottom-up merge sort, using code contributed
4573 by Michael Haardt. This should make operations like -bp somewhat faster on
4574 large queues. It won't affect queue runners, except when queue_run_in_order
4577 51. Installed eximstats 1.31 in the distribution.
4579 52. Added support for SRV lookups to the dnslookup router.
4581 53. If an ACL referred to $message_body or $message_body_end, the value was not
4582 reset for any messages that followed in the same SMTP session.
4584 54. The store-handling optimization for building very long strings was not
4585 differentiating between the different store pools. I don't think this
4586 actually made any difference in practice, but I've tidied it.
4588 55. While running the routers to verify a sender address, $sender_address
4589 was still set to the sender address. This is wrong, because when routing to
4590 send a bounce to the sender, it would be empty. Therefore, I have changed
4591 it so that, while verifying a sender address, $sender_address is set to <>.
4592 (There is no change to what happens when verifying a recipient address.)
4594 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4595 target A or AAAA records (if not already returned) without resetting the
4596 qualify_single or search_parents options of the DNS resolver. These are
4597 inappropriate in this case because the targets of MX and SRV records must
4598 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4599 target that, when qualified, matched something in the local domain. These
4600 two options are now turned off when doing these lookups.
4602 57. It seems that at least some releases of Reiserfs (which does not have the
4603 concept of a fixed number of inodes) returns zero and not -1 for the
4604 number of available inodes. This interacted badly with check_spool_inodes,
4605 which assumed that -1 was the "no such thing" setting. What I have done is
4606 to check that the total number of inodes is greater than zero before doing
4607 the test of how many are available.
4609 58. When a "warn" ACL statement has a log_message modifier, the message is
4610 remembered, and not repeated. This is to avoid a lot of repetition when a
4611 message has many recipients that cause the same warning to be written.
4612 Howewer, Exim was preserving the list of already written lines for an
4613 entire SMTP session, which doesn't seem right. The memory is now reset if a
4614 new message is started.
4616 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4617 debugging output unless log_rewrite was also set.
4619 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4620 of (int)(handle) when we know that handle contains (void *)(-1).
4622 61. The Exim daemon panic-logs an error return when it closes the incoming
4623 connection. However "connection reset by peer" seems to be common, and
4624 isn't really an error worthy of noting specially, so that particular error
4627 62. When Exim is trying to find all the local interfaces, it used to panic and
4628 die if the ioctl to get the interface flags failed. However, it seems that
4629 on at least one OS (Solaris 9) it is possible to have an interface that is
4630 included in the list of interfaces, but for which you get a failure error
4631 for this call. This happens when the interface is not "plumbed" into a
4632 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4633 failure of the "get flags" call assumes that the interface is down.
4635 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4636 makes life easier for people who are doing arithmetic on fields extracted
4637 from dates, where you often get leading zeros that should not be
4638 interpreted as octal.
4640 64. Added qualify_domain to the redirect router, to override the global
4643 65. If a pathologically long header line contained very many addresses (the
4644 report of this problem mentioned 10 000) and each of them was rewritten,
4645 Exim could use up a very large amount of memory. (It kept on making new
4646 copies of the header line as it rewrote, and never released the old ones.)
4647 At the expense of a bit more processing, the header rewriting function has
4648 been changed so that it no longer eats memory in this way.
4650 66. The generation of the Received: header has been moved from the time that a
4651 message starts to be received, to the time that it finishes. The timestamp
4652 in the Received: header should now be very close to that of the <= log
4653 line. There are two side-effects of this change:
4655 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4656 logged header lines no longer include the local Received: line, because
4657 it has not yet been created. The same applies to a copy of the message
4658 that is returned to a non-SMTP sender when a message is rejected.
4660 (b) When a filter file is tested using -bf, no additional Received: header
4661 is added to the test message. After some thought, I decided that this
4664 This change does not affect the value of $received_for. It is still set
4665 after address rewriting, but before local_scan() is called.
4667 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4669 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4670 gave an unhelpful panic error message, and a defer error. I have managed to
4671 change this behaviour so that it now rejects any supplied certificate,
4672 which seems right, as the list of acceptable certificates is empty.
4674 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4675 gave an unhelpful defer error. I have not managed to make this reject any
4676 supplied certificates, but the error message it gives is "no certificate
4677 supplied", which is not helpful.
4679 70. exigrep's output now also includes lines that are not associated with any
4680 message, but which match the given pattern. Implemented by a patch from
4681 Martin Sluka, which also tidied up the Perl a bit.
4683 71. Recipient callout verification, like sender verification, was using <> in
4684 the MAIL FROM command. This isn't really the right thing, since the actual
4685 sender may affect whether the remote host accepts the recipient or not. I
4686 have changed it to use the actual sender in the callout; this means that
4687 the cache record is now keyed on a recipient/sender pair, not just the
4688 recipient address. There doesn't seem to be a real danger of callout loops,
4689 since a callout by the remote host to check the sender would use <>.
4690 [SEE ABOVE: changed after hitting problems.]
4692 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4693 temporary errors. However, in the case of such a code being given after
4694 the end of a data transmission (i.e. after ".") Exim was failing to write
4695 a retry record for the message. (Yes, there was some broken host that was
4696 actually sending 8xx at this point.)
4698 73. An unknown lookup type in a host list could cause Exim to panic-die when
4699 the list was checked. (An example that provoked this was putting <; in the
4700 middle of a list instead of at the start.) If this happened during a DATA
4701 ACL check, a -D file could be left lying around. This kind of configuration
4702 error no longer causes Exim to die; instead it causes a defer errror. The
4703 incident is still logged to the main and panic logs.
4705 74. Buglet left over from Exim 3 conversion. The message "too many messages
4706 in one connection" was written to the rejectlog but not the mainlog, except
4707 when address rewriting (yes!) was being logged.
4709 75. Added write_rejectlog option.
4711 76. When a system filter was run not as root (that is, when system_filter_user
4712 was set), the values of the $n variables were not being returned to the
4713 main process; thus, they were not subsequently available in the $sn
4716 77. Added +return_path_on_delivery log selector.
4718 78. A connection timeout was being treated differently from recipients deferred
4719 when testing hosts_max_try with a message that was older than the host's
4720 retry timeout. (The host should not be counted, thus allowing all hosts to
4721 be tried at least once before bouncing.) This may have been the cause of an
4722 occasionally reported bug whereby a message would remain on the queue
4723 longer than the retry timeout, but would be bounced if a delivery was
4724 forced. I say "may" because I never totally pinned down the problem;
4725 setting up timeout/retry tests is difficult. See also the next item.
4727 79. The ultimate address timeout was not being applied to errors that involved
4728 a combination of host plus message (for example, a timeout on a MAIL
4729 command). When an address resolved to a number of possible hosts, and they
4730 were not all tried for each delivery (e.g. because of hosts_max_try), a
4731 message could remain on the queue longer than the retry timeout.
4733 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4736 81. Fixed an obscure SMTP outgoing bug which required at least the following
4737 conditions: (a) there was another message waiting for the same server;
4738 (b) the server returned 5xx to all RCPT commands in the first message so
4739 that the message was not completed; (c) the server dropped the connection
4740 or gave a negative response to the RSET that Exim sends to abort the
4741 transaction. The observed case was a dropped connection after DATA that had
4742 been sent in pipelining mode. That is, the server had advertised PIPELINING
4743 but was not implementing it correctly. The effect of the bug was incorrect
4744 behaviour, such as trying another host, and this could lead to a crash.
4750 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4751 and daemon.c were passed as pointers to ints; they should have been
4752 pointers to socklen_t variables (which are typically unsigned ints).
4754 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4757 3. Fixed a really odd bug that affected only the testing scheme; patching a
4758 certain fixed string in the binary changed the value of another string that
4759 happened to be identical to the end of the original first string.
4761 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4762 name", it returns that address as the IP address. On some operating
4763 systems (e.g. Solaris), it also passes back the IP address string as the
4764 "host name". However, on others (e.g. Linux), it passes back an empty
4765 string. Exim wasn't checking for this, and was changing the host name to an
4766 empty string, assuming it had been canonicized.
4768 5. Although rare, it is permitted to have more than one PTR record for a given
4769 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4770 all the names associated with an address, because they do in Solaris.
4771 However, it seems that they do not in Linux for data that comes from the
4772 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4773 I found this out when I moved to a new Linux workstation and tried to run
4774 the Exim test suite.
4776 To get round this problem I have changed the code so that it now does its
4777 own call to the DNS to look up PTR records when searching for a host name.
4778 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4779 addresses that are only in /etc/hosts are still found.
4781 This behaviour is, however, controlled by an option called host_lookup_
4782 order, which defaults to "bydns:byaddr". If people want to use the other
4783 order, or indeed, just use one or the other means of lookup, they can
4784 specify it in this variable.
4786 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4787 some operating systems, this comes back from gethostbyaddr() as an empty
4788 string, and this is what Exim used to test for. However, it seems that in
4789 other systems, "." is yielded. Exim now tests for this case too.
4791 7. The values of check_spool_space and check_log_space are now held internally
4792 as a number of kilobytes instead of an absolute number of bytes. If a
4793 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4794 kilobyte. This means that much larger values can be stored.
4796 8. Exim monitor: an attempt to get the action menu when not actually pointing
4797 at a message produces an empty menu entitled "No message selected". This
4798 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4799 no entries in it ("Shell widget menu has zero width and/or height"). So I
4800 have added a single, blank menu entry in this case.
4802 9. Added ${quote_local_part.
4804 10. MIME decoding is now applied to the contents of Subject: header lines when
4807 11. Now that a reference to $sender_host_address automatically causes a reverse
4808 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4809 host lookup before query-style lookups in lists that might use this
4810 variable. This has therefore been abolished, and the "net-" prefix is no
4811 longer necessary for query-style lookups.
4813 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4814 have been a typo for LFLAGS, so it has been changed.
4816 13. The install script calls Exim with "-C /dev/null" in order to find the
4817 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4818 to be output. Howeve, since Exim outputs its version number before the
4819 error, it didn't break the script. It just looked ugly. I fixed this by
4820 always allowing "-C /dev/null" if the caller is root.
4822 14. Ignore overlarge ACL variable number when reading spool file - insurance
4823 against a later release with more variables having written the file.
4825 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4826 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4827 this, as well as the form without the "IPv6" on the front.
4829 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4830 OS/Makefile-Darwin file.
4832 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4833 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4835 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4836 variable. However, some OS use ints for inodes. I've added cast to long int
4837 to get rid of the compiler warning.
4839 19. I had forgotten to lock out "/../" in configuration file names when
4840 ALT_CONFIG_PREFIX was set.
4842 20. Routers used for verification do not need to specify transports. However,
4843 if such a router generated a host list, and callout was configured, Exim
4844 crashed, because it could not find a port number from the (non-existent)
4845 transport. It now assumes port 25 in this circumstance.
4847 21. Added the -t option to exigrep.
4849 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4850 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4851 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4852 them is set, LOOKUP_LSEARCH is forced.
4854 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4856 24. Added sender and host information to the "rejected by local_scan()" log
4857 line; previously there was no indication of these.
4859 25. Added .include_if_exists.
4861 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4862 Linux. It turns out that not all file systems support this. Apparently some
4863 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4864 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4865 not supported on the file descriptor, is now ignored when Exim is trying to
4866 sync a directory. This applies only to Linux.
4868 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4870 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4871 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4874 29. Added support for maildirsize files from supplied patch (modified a bit).
4876 30. The use of :fail: followed by an empty string could lead Exim to respond to
4877 sender verification failures with (e.g.):
4879 550 Verification failed for <xxx>
4880 550 Sender verify failed
4882 where the first response line was missing the '-' that indicates it is not
4883 the final line of the response.
4885 31. The loop for finding the name of the user that called Exim had a hardwired
4886 limit of 10; it now uses the value of finduser_retries, which is used for
4887 all other user lookups.
4889 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4892 33. Exim was neglecting to zero errno before one call of strtol() when
4893 expanding a string and expecting an integer value. On some systems this
4894 resulted in spurious "integer overflow" errors. Also, it was casting the
4895 result into an int without checking.
4897 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4898 did not work. The code looks as if it has *never* worked, though it appears
4899 to have been documented since at least releast 1.62. I have made it work.
4901 35. The "timeout_DNS" error in retry rules, also documented since at least
4902 1.62, also never worked. As it isn't clear exactly what this means, and
4903 clearly it isn't a major issue, I have abolished the feature by treating it
4904 as "timeout", and writing a warning to the main and panic logs.
4906 36. The display of retry rules for -brt wasn't always showing the error code
4909 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4910 timeout_connect_A, timeout_connect_MX.
4912 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4913 to the empty sender.
4915 39. The daemon was not analysing the content of -oX till after it had closed
4916 stderr and disconnected from the controlling terminal. This meant that any
4917 syntax errors were only noted on the panic log, and the return code from
4918 the command was 0. By re-arranging the code a little, I've made the
4919 decoding happen first, so such errors now appear on stderr, and the return
4920 code is 1. However, the actual setting up of the sockets still happens in
4921 the disconnected process, so errors there are still only recorded on the
4924 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4925 connections (as happens on some IP stacks) was logged at start up time as
4926 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4927 it from "IPv6 and IPv4", which means that two separate sockets are being
4930 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4931 says whether AF_INET or AF_INET6 was passed as an argument.
4933 42. Exiwhat output was messed up when time zones were included in log
4936 43. Exiwhat now gives more information about the daemon's listening ports,
4937 and whether -tls-on-connect was used.
4939 44. The "port" option of the smtp transport is now expanded.
4941 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4942 silently ignored. Now an error message is written to the main and panic
4945 46. There's a new ACL modifier called "logwrite" which writes to a log file
4946 as soon as it is encountered.
4948 47. Added $local_user_uid and $local_user_gid at routing time.
4950 48. Exim crashed when trying to verify a sender address that was being
4953 49. Exim was recognizing only a space character after ".include". It now also
4954 recognizes a tab character.
4956 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4957 extracting the relevant information from the specification. The man page no
4958 longer contains scrambled data for the -d option, and I've added a section
4959 at the front about calling Exim under different names.
4961 51. Added "extra_headers" argument to the "mail" command in filter files.
4963 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4966 53. Installed eximstats 1.29.
4968 54. Added transport_filter_timeout as a generic transport option.
4970 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4971 Cc: header lines. This was required by RFC 822, but it not required by RFC
4974 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4975 incoming messages that did not have them. Now it does so only if the
4976 message originates locally, that is, if there is no associated remote host
4977 address. When Resent- header lines are present, this applies to the Resent-
4978 lines rather than the non-Resent- lines.
4980 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4981 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4983 58. Messages for configuration errors now include the name of the main
4984 configuration file - useful now that there may be more than one file in a
4985 list (.included file names were always shown).
4987 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4988 for those rare installations that do not start the daemon as root or run it
4989 setuid root. I've cut out the call to initgroups() if the daemon is not
4992 60. The Exim user and group can now be bound into the binary as text strings
4993 that are looked up at the start of Exim's processing.
4995 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4997 62. Added $mailstore_basename variable.
4999 63. Installed patch to sieve.c from Michael Haardt.
5001 64. When Exim failed to open the panic log after failing to open the main log,
5002 the original message it was trying to log was written to stderr and debug
5003 output, but if they were not available (the usual case in production), it
5004 was lost. Now it is written to syslog before the two lines that record the
5005 failures to open the logs.
5007 65. Users' Exim filters run in subprocesses under the user's uid. It is
5008 possible for a "deliver" command or an alias in a "personal" command to
5009 provoke an address rewrite. If logging of address rewriting is configured,
5010 this fails because the process is not running as root or exim. There may be
5011 a better way of dealing with this, but for the moment (because 4.30 needs
5012 to be released), I have disabled address rewrite logging when running a
5013 filter in a non-root, non-exim process.
5019 1. The buildconfig auxiliary program wasn't quoting the value set for
5020 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5021 not defined. This bug was masked in 4.22 by the effect that was fixed in
5024 2. Some messages that were rejected after a message id was allocated were
5025 shown as "incomplete" by exigrep. It no longer does this for messages that
5026 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5028 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5029 have allow_domain_literals set, the ID did not get logged in the <= line.
5030 Domain literals are now always recognized in Message-ID: header lines.
5032 4. The first argument for a ${extract expansion item is the key name or field
5033 number. Leading and trailing spaces in this item were not being ignored,
5034 causing some misleading effects.
5036 5. When deliver_drop_privilege was set, single queue runner processes started
5037 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5038 same command in the process it spins off) were not dropping privilege.
5040 6. When the daemon running as "exim" started a queue runner, it always
5041 re-executed Exim in the spun-off process. This is a waste of effort when
5042 deliver_drop_privilege is set. The new process now just calls the
5043 queue-runner function directly.
5049 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5052 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5053 ignored. Though the use of -oP was forcing the writing of a pid file, it
5054 was always written to the default place.
5056 3. If the message "no IP address found for host xxxx" is generated during
5057 incoming verification, it is now followed by identification of the incoming
5058 connection (so you can more easily find what provoked it).
5060 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5062 5. Added some features to "harden" Exim a bit more against certain attacks:
5064 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5065 be put in Local/Makefile. This is like the never_users runtime option,
5066 but it cannot be overridden. The default setting is "root".
5068 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5069 prefix string with which any file named in a -C command line option
5072 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5073 is retained for -C and -D only if the caller of Exim is root. Without
5074 it, the exim user may also use -C and -D and retain privilege.
5076 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5077 command line option is disabled.
5079 6. Macro names set by the -D option must start with an upper case letter, just
5080 like macro names defined in the configuration file.
5082 7. Added "dereference=" facility to LDAP.
5084 8. Two instances of the typo "uknown" in the source files are fixed.
5086 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5087 the Configure-Makefile script screwed up while processing it.
5089 10. Incorporated PCRE 4.4.
5091 11. The SMTP synchronization check was not operating right at the start of an
5092 SMTP session. For example, it could not catch a HELO sent before the client
5093 waited for the greeting. There is now a check for outstanding input at the
5094 point when the greeting is written. Because of the duplex, asynchronous
5095 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5096 way, but not yet received, when the check is performed.
5098 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5099 on TCP/IP sockets, because this apparently causes some broken clients to
5102 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5103 unchanged) from the Cygwin maintainer.
5105 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5106 was supported instead of testing for mbx. Effectively a typo.
5108 15. The spa authenticator server code was not checking that the input it
5109 received was valid base64.
5111 16. The debug output line for the "set" modifier in ACLs was not showing the
5112 name of the variable that was being set.
5114 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5116 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5117 lookup on its own. Something else was needed to trigger the lookup. For
5118 example, a match in host_lookup or the need for a host name in a host list.
5119 Now, if $sender_host_name is referenced and the host name has not yet been
5120 looked up, a lookup is performed. If the lookup fails, the variable remains
5121 empty, and $host_lookup_failed is set to "1".
5123 19. Added "eqi" as a case-independent comparison operator.
5125 20. The saslauthd authentication condition could segfault if neither service
5126 nor realm was specified.
5128 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5129 error message that was logged was misleading, and incoming SMTP
5130 connections were dropped. The message is now more accurate, and temporary
5131 errors are given to SMTP connections.
5133 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5134 (except RSET) with a 421 error, until QUIT is received. However, it was
5135 failing to send a response to QUIT.
5137 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5138 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5139 ACL is now run after the helo_try_verify_hosts code.
5141 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5142 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5143 case-independent, so other case variants are also recognized). Apparently
5144 some systems use these upper case variants.
5146 25. If more than two messages were waiting for the same host, and a transport
5147 filter was specified for the transport, Exim sent two messages over the
5148 same TCP/IP connection, and then failed with "socket operation on non-
5149 socket" when it tried to send the third.
5151 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5153 27. The extern definition of crypt16() in expand.c was not being excluded when
5154 the OS had its own crypt16() function.
5156 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5157 as a preferred synonym for return_size_limit, both as an option and as an
5160 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5162 30. Changed the default configuration ACL to relax the local part checking rule
5163 for addresses that are not in any local domains. For these addresses,
5164 slashes and pipe symbols are allowed within local parts, but the sequence
5165 /../ is explicitly forbidden.
5167 31. SPA server authentication was not clearing the challenge buffer before
5170 32. log_message in a "warn" ACL statement was writing to the reject log as
5171 well as to the main log, which contradicts the documentation and doesn't
5172 seem right (because no rejection is happening). So I have stopped it.
5174 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5175 However, I am unable to do any testing of this.
5177 34. Fixed an infelicity in the appendfile transport. When checking directories
5178 for a mailbox, to see if any needed to be created, it was accidentally
5179 using path names with one or more superfluous leading slashes; tracing
5180 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5182 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5183 contents are added to the log line that is written for every discarded
5184 recipient. (Previously a log_message setting was ignored.)
5186 36. The ${quote: operator now quotes the string if it is empty.
5188 37. The install script runs exim in order to find its version number. If for
5189 some reason other than non-existence or emptiness, which it checks, it
5190 could not run './exim', it was installing it with an empty version number,
5191 i.e. as "exim-". This error state is now caught, and the installation is
5194 38. An argument was missing from the function that creates an error message
5195 when Exim fails to connect to the socket for saslauthd authentication.
5196 This could cause Exim to crash, or give a corrupted message.
5198 39. Added isip, isip4, and isip6 to ${if conditions.
5200 40. The ACL variables $acl_xx are now saved with the message, and can be
5201 accessed later in routers, transports, and filters.
5203 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5204 strings in the file are not string-expanded.
5206 42. If a MAIL command specified a SIZE value that was too large to fit into an
5207 int variable, the check against message_size_limit failed. Such values are
5208 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5209 day this will have to be increased, but I don't think I want to be around
5210 when emails are that large.
5217 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5218 iconv() is not standard in FreeBSD.
5220 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5221 IPv6 enabled. The observed symptom was a segmentation fault on return from
5222 the function os_common_find_running_interfaces() in src/os.c.
5224 3. In the check_special_case() function in daemon.c I had used "errno" as an
5225 argument name, which causes warnings on some systems. This was basically a
5226 typo, since it was named "eno" in the comments!
5228 4. The code that waits for the clock to tick (at a resolution of some fraction
5229 of a second) so as to ensure message-id uniqueness was always waiting for
5230 at least one whole tick, when it could have waited for less. [This is
5231 almost certainly not relevant at current processor speeds, where it is
5232 unlikely to ever wait at all. But we try to future-proof.]
5234 5. The function that sleeps for a time interval that includes fractions of a
5235 second contained a race. It did not block SIGALRM between setting the
5236 timer, and suspending (a couple of lines later). If the interval was short
5237 and the sigsuspend() was delayed until after it had expired, the suspension
5238 never ended. On busy systems this could lead to processes getting stuck for
5241 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5242 process, before it forks any delivery processes. The open lookup caching
5243 mechanism meant that the open file or database connection was passed into
5244 the delivery process. The problem was that delivery processes always tidy
5245 up cached lookup data. This could cause a problem for the next delivery
5246 process started by the queue runner, because the external queue runner
5247 process does not know about the closure. So the next delivery process
5248 still has data in the lookup cache. In the case of a file lookup, there was
5249 no problem because closing a file descriptor in a subprocess doesn't affect
5250 the parent. However, if the lookup was caching a connection to a database,
5251 the connection was closed, and the second delivery process was likely to
5252 see errors such as "PGSQL: query failed: server closed the connection
5253 unexpectedly". The problem has been fixed by closing all cached lookups
5254 in a queue runner before running a delivery process.
5256 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5257 seem to have the "const" qualifier which it has on other OS. I've
5260 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5261 *of the same type* (client or server) with the same public name that an
5262 error should be diagnosed.
5264 9. When Exim looked up a host name for an IP address, but failed to find the
5265 original IP address when looking up the host name (a safety check), it
5266 output the message "<ip address> does not match any IP for NULL", which was
5267 confusing, to say the least. The bug was that the host name should have
5268 appeared instead of "NULL".
5270 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5271 user that is built into the binary, and the -C or -D options is used, root
5272 privilege is dropped before the configuration file is read. In addition,
5273 logging is switched to stderr instead of the normal log files. If the
5274 configuration then re-defines the Exim user, the unprivileged environment
5275 is probably not what is expected, so Exim logs a panic warning message (but
5278 However, if deliver_drop_privilege is set, the unprivileged state may well
5279 be exactly what is intended, so the warning has been cut out in that case,
5280 and Exim is allowed to try to write to its normal log files.
5286 1. smtp_return_error_details was not giving details for temporary sender
5287 or receiver verification errors.
5289 2. Diagnose a configuration error if two authenticators have the same public
5292 3. Exim used not to create the message log file for a message until the first
5293 delivery attempt. This could be confusing when incoming messages were held
5294 for policy or load reasons. The message log file is now created at the time
5295 the message is received, and an initial "Received" line is written to it.
5297 4. The automatically generated man page for command line options had a minor
5298 bug that caused no ill effects; however, a more serious problem was that
5299 the procedure for building the man page automatically didn't always
5300 operate. Consequently, release 4.20 contains an out-of-date version. This
5301 shouldn't happen again.
5303 5. When building Exim with embedded Perl support, the script that builds the
5304 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5305 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5307 6. The freeze_tell option was not being used for messages that were frozen on
5308 arrival, either by an ACL or by local_scan().
5310 7. Added the smtp_incomplete_transaction log selector.
5312 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5313 was accepting AUTH without a new EHLO.
5315 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5316 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5319 10. Logging of TCP/IP connections (when configured) now happens in the main
5320 daemon process instead of the child process, so that the TCP/IP connection
5321 count is more accurate (but it can never be perfect).
5323 11. The use of "drop" in a nested ACL was not being handled correctly in the
5324 outer ACL. Now, if condition failure induced by the nested "drop" causes
5325 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5326 or "require"), the connection is dropped.
5328 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5329 that yield "discard" can now be used with an "accept" or a "discard" verb,
5330 but an error is generated for any others (because I can't see a useful way
5331 to define what should happen).
5333 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5334 are now processed in the same way as lines in the Exim configuration file.
5335 In particular, continuation lines are supported.
5337 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5339 15. Added -ti meaning -t -i.
5341 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5342 domains, and warn by logging if others are found.
5344 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5345 returned from GIFCONF when Exim is trying to find the list of interfaces on
5346 a host. The code in os.c has been modified to copy each ifreq to an aligned
5347 structure in all cases.
5349 Also, in some cases, the returned ifreq's were being copied to a 'struct
5350 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5351 means the last couple of bytes of an IPv6 address could be chopped if the
5352 ifreq contained only a normal sockaddr (14 bytes storage).
5354 18. Named domain lists were not supported in the hosts_treat_as_local option.
5355 An entry such as +xxxx was not recognized, and was treated as a literal
5358 19. Ensure that header lines added by a DATA ACL are included in the reject log
5359 if the ACL subsequently rejects the message.
5361 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5362 MD5 (which is deprecated).
5364 21. When testing a filter file using -bf, Exim was writing a message when it
5365 took the sender from a "From " line in the message, but it was not doing so
5366 when it took $return_path from a Return-Path: header line. It now does.
5368 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5369 with a valid header line field name (a series of printing characters
5370 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5372 23. Changed "disc" in the source to "disk" to conform to the documentation and
5373 the book and for uniformity.
5375 24. Ignore Sendmail's -Ooption=value command line item.
5377 25. When execve() failed while trying to run a command in a pipe transport,
5378 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5379 could be confused with a return value of 69 from the command itself. This
5380 has been changed to 127, the value the shell returns if it is asked to run
5381 a non-existent command. The wording for the related log line suggests a
5382 non-existent command as the problem.
5384 26. If received_header_text expands to an empty string, do not add a Received:
5385 header line to the message. (Well, it adds a token one on the spool, but
5386 marks it "old" so that it doesn't get used or transmitted.)
5388 27. Installed eximstats 1.28 (addition of -nt option).
5390 28. There was no check for failure on the call to getsockname() in the daemon
5391 code. This can fail if there is a shortage of resources on the system, with
5392 ENOMEM, for example. A temporary error is now given on failure.
5394 29. Contrary to the C standard, it seems that in some environments, the
5395 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5396 program. Exim now does this explicitly; it affects the formatting of
5397 timestamps using strftime().
5399 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5400 complaints. I've now initialized all the variables, to avoid this.
5402 32. Header lines added by a system filter were not being "seen" during
5403 transport-time rewrites.
5405 33. The info_callback() function passed to OpenSSL is set up with type void
5406 (*)(SSL *, int, int), as described somewhere. However, when calling the
5407 function (actually a macro) that sets it up, the type void(*)() is
5408 expected. I've put in a cast to prevent warnings from picky compilers.
5410 34. If a DNS black list lookup found a CNAME record, but there were no A
5411 records associated with the domain it pointed at, Exim crashed.
5413 35. If a DNS black list lookup returned more than one A record, Exim ignored
5414 all but the first. It now scans all returned addresses if a particular IP
5415 value is being sought. In this situation, the contents of the
5416 $dnslist_value variable are a list of all the addresses, separated by a
5419 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5420 to accept a host name and all its aliases if the forward lookup for any of
5421 them yielded the IP address of the incoming connection. Now it accepts only
5422 those names whose forward lookup yields the correct IP address. Any other
5423 names are discarded. This closes a loophole whereby a rogue DNS
5424 administrator could create reverse DNS records to break through a
5425 wildcarded host restriction in an ACL.
5427 37. If a user filter or a system filter that ran in a subprocess used any of
5428 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5429 the wrong values were passed to the pipe command ($thisaddress had the
5430 value of $0, $0 had the value of $1, etc). This bug was introduced by
5431 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5433 38. Improved the line breaking for long SMTP error messages from ACLs.
5434 Previously, if there was no break point between 40 and 75 characters, Exim
5435 left the rest of the message alone. Two changes have been made: (a) I've
5436 reduced the minimum length to 35 characters; (b) if it can't find a break
5437 point between 35 and 75 characters, it looks ahead and uses the first one
5438 that it finds. This may give the occasional overlong line, but at least the
5439 remaining text gets split now.
5441 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5442 file descriptors might be low, and that setting 1000 would always raise it.
5443 It turns out that in some environments, the limit is already over 1000 and
5444 that lowering it causes trouble. So now Exim takes care not to decrease it.
5446 40. When delivering a message, the value of $return_path is set to $sender_
5447 address at the start of routing (routers may change the value). By an
5448 oversight, this default was not being set up when an address was tested by
5449 -bt or -bv, which affected the outcome if any router or filter referred to
5452 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5453 log only when "message" or "log_message" are set. However, if one of the
5454 conditions was an address verification, or a call to a nested ACL, the
5455 messages generated by the underlying test were being passed through. This
5456 no longer happens. The underlying message is available in $acl_verify_
5457 message for both "message" and "log_message" expansions, so it can be
5458 passed through if needed.
5460 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5461 new expansion $bh_ to give the encoded byte string without charset
5462 translation. Translation happens only if iconv() is available; HAVE_ICONV
5463 indicates this at build time. HEADERS_CHARSET gives the charset to
5464 translate to; headers_charset can change it in the configuration, and
5465 "headers charset" can change it in an individual filter file.
5467 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5468 that creates RFC 2047 encoded "words" labels them as that charset instead
5469 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5470 expansion operator; (ii) when Exim creates a From: line for a local
5471 message; (iii) when a header line is rewritten to include a "phrase" part.
5473 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5474 buggy, causing it to skip the first lines of messages whose message ID
5475 ended in 'D'. This would not have bitten before Exim release 4.14, because
5476 message IDs were unlikely to end in 'D' before then. The effect was to have
5477 incorrect size information for certain domains.
5479 45. #include "config.h" was missing at the start of the crypt16.c module. This
5480 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5483 46. If there was a timeout during a "random" callout check, Exim treated it as
5484 a failure of the random address, and carried on sending RSET and the real
5485 address. If the delay was just some slowness somewhere, the response to the
5486 original RCPT would be taken as a response to RSET and so on, causing
5487 mayhem of various kinds.
5489 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5490 when I implemented it. It didn't allow for the fact that some option values
5491 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5492 the right test for positive values.
5494 48. Domain names in DNS records are case-independent. Exim always looks them up
5495 in lower case. Some resolvers return domain names in exactly the case they
5496 appear in the zone file, that is, they may contain uppercase letters. Not
5497 all resolvers do this - some return always lower case. Exim was treating a
5498 change of case by a resolver as a change of domain, similar to a widening
5499 of a domain abbreviation. This triggered its re-routing code and so it was
5500 trying to route what was effectively the same domain again. This normally
5501 caused routing to fail (because the router wouldn't handle the domain
5502 twice). Now Exim checks for this case specially, and just changes the
5503 casing of the domain that it ultimately uses when it transmits the message
5506 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5509 50. If a filter generated a file delivery with a non-absolute name (possible if
5510 no home directory exists for the router), the forbid_file option was not
5513 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5514 the existing equality matching.
5516 52. Exim was using ints instead of ino_t variables in some places where it was
5517 dealing with inode numbers.
5519 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5520 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5521 called TMPDIR, and if it finds it is different, it changes its value.
5523 54. The smtp_printf() function is now made available to local_scan() so
5524 additional output lines can be written before returning. There is also an
5525 smtp_fflush() function to enable the detection of a dropped connection.
5526 The variables smtp_input and smtp_batched_input are exported to
5529 55. Changed the default runtime configuration: the message "Unknown user"
5530 has been removed from the ACL, and instead placed on the localuser router,
5531 using the cannot_route_message feature. This means that any verification
5532 failures that generate their own messages won't get overridden. Similarly,
5533 the "Unrouteable address" message that was in the ACL for unverifiable
5534 relay addresses has also been removed.
5536 56. Added hosts_avoid_esmtp to the smtp transport.
5538 57. The exicyclog script was not checking for the esoteric option
5539 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5540 will work only if exicyclog is run under the appropriate euid.
5542 58. Following a discussion on the list, the rules by which Exim recognises line
5543 endings on incoming messages have been changed. The -dropcr and drop_cr
5544 options are now no-ops, retained only for backwards compatibility. The
5545 following line terminators are recognized: LF CRLF CR. However, special
5546 processing applies to CR:
5548 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5549 nor a local message in the state where . is a terminator.
5551 (ii) If a bare CR is encountered in a header line, an extra space is added
5552 after the line terminator so as not to end the header. The reasoning
5553 behind this is that bare CRs in header lines are most likely either
5554 to be mistakes, or people trying to play silly games.
5556 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5557 was being incorrectly given as 18 bytes larger than it should have been.
5558 This is a VOB (very old bug).
5560 60. This may never have affected anything current, but just in case it has:
5561 When the local host is found other than at the start of a list of hosts,
5562 the local host, those with the same MX, and any that follow, are discarded.
5563 When the list in question was part of a longer list of hosts, the following
5564 hosts (not currently being processed) were also being discarded. This no
5565 longer happens. I'm not sure if this situation could ever has previously
5568 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5571 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5572 header. This is something that is recommended in a new Internet Draft, and
5573 is something that is documented as being done by Sendmail. There are two
5574 possible values. For messages generated by the autoreply transport, Exim
5577 Auto-Submitted: auto-replied
5579 whereas for all other generated messages (e.g. bounces) it adds
5581 Auto-Submitted: auto-generated
5583 63. The "personal" condition in filters now includes a test for the
5584 Auto-Submitted: header. If it contains the string "auto-" the message it
5585 not considered personal.
5587 64. Added rcpt_include_affixes as a generic transport option.
5589 65. Added queue_only_override (default true).
5591 66. Added the syslog_duplication option.
5593 67. If what should have been the first header line of a message consisted of
5594 a space followed by a colon, Exim was mis-interpreting it as a header line.
5595 It isn't of course - it is syntactically invalid and should therefore be
5596 treated as the start of the message body. The misbehaviour could have
5597 caused a number of strange effects, including loss of data in subsequent
5598 header lines, and spool format errors.
5600 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5601 client host had authenticated. This control can now be exercised by an ACL
5602 for more flexibility.
5604 69. By default, callouts do not happen when testing with -bh. There is now a
5605 variant, -bhc, which does actually run the callout code, including
5606 consulting and updating the callout cache.
5608 70. Added support for saslauthd authentication, courtesy of Alexander
5611 71. If statvfs() failed on the spool or log directories while checking their
5612 size for availability, Exim confusingly gave the error "space shortage".
5613 Furthermore, in debugging mode it crashed with a floating point exception.
5614 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5615 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5616 serious problem, Exim now writes to the main and panic logs when this
5617 happens, with details of the failure. It then refuses to accept the
5618 incoming message, giving the message "spool directory problem" or "log
5619 directory problem" with a 421 code for SMTP messages.
5621 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5622 0, 1, and 2 exist, because some OS complain for execs without them (see
5623 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5624 descriptors. However, the code omitted to check that the open succeeded,
5625 causing mysterious errors if for some reason the permissions on /dev/null
5626 got screwed. Now Exim writes a message to the main and panic logs, and
5627 bombs out if it can't open /dev/null.
5629 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5630 interact so that it is all more flexible. It is supposed to remain
5631 backwards compatible. Also added extra_local_interfaces.
5633 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5634 to bomb out with an assertion failure - to the client this appears as a
5635 connection drop. This problem occurs in the part of the code that was taken
5636 from the Samba project. Fortunately, the assertion is in a very simple
5637 function, so I have fixed this by reproducing the function inline in the
5638 one place where it is called, and arranging for authentication to fail
5639 instead of killing the process with assert().
5641 75. The SPA client code was not working when the server requested OEM rather
5642 than Unicode encoding.
5644 76. Added code to make require_files with a specific uid setting more usable in
5645 the case where statting the file as root fails - usually a non-root-mounted
5646 NFS file system. When this happens and the failure is EACCES, Exim now
5647 forks a subprocess and does the per-uid checking as the relevant uid.
5649 77. Added process_log_path.
5651 78. If log_file_path was not explicitly set, a setting of check_log_space or
5652 check_log_inodes was ignored.
5654 79. If a space check for the spool or log partitions fails, the incident is now
5655 logged. Of course, in the latter case the data may get lost...
5657 80. Added the %p formatting code to string_format() so that it can be used to
5658 print addresses in debug_print(). Adjusted all the address printing in the
5659 debugging in store.c to use %p rather than %d.
5661 81. There was a concern that a line of code in smtp_in.c could overflow a
5662 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5663 initially expressed, the concern was not well-founded, because trailing
5664 spaces are removed early. However, if the trailing spaces were followed by
5665 a NULL, they did not get removed, so the overflow was possible. Two fixes
5668 (a) I re-wrote the offending code in a cleaner fashion.
5669 (b) If an incoming SMTP command contains a NULL character, it is rejected
5672 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5673 runs initgroups(), so that if the Exim user is in any additional groups,
5674 they will be used during message reception.
5680 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob