1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
9 PP/02 Make -n do something, by making it not do something.
10 When combined with -bP, the name of an option is not output.
12 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
15 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
16 $sender_host_name and config options to manage this, and basic check
19 PP/05 DSCP support for outbound connections and control modifier for inbound.
21 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
22 (Only plugin which currently uses this is kerberos4, which nobody should
23 be using, but we should make it available and other future plugins might
24 conceivably use it, even though it would break NAT; stuff *should* be
25 using channel bindings instead).
27 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
28 name; added for Sendmail compatibility; requires admin caller.
29 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
30 just ignore it); requires trusted caller.
31 Also parse but ignore: -Ac -Am -X<logfile>
34 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
36 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
41 PP/01 Handle short writes when writing local log-files.
42 In practice, only affects FreeBSD (8 onwards).
43 Bugzilla 1053, with thanks to Dmitry Isaikin.
45 NM/01 Bugzilla 949 - Documentation tweak
47 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
50 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
52 PP/02 Implemented gsasl authenticator.
54 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
56 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
57 `pkg-config foo` for cflags/libs.
59 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
60 with rest of GSASL and with heimdal_gssapi.
62 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
63 `pkg-config foo` for cflags/libs for the TLS implementation.
65 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
66 properties get this fed in as external SSF. A number of robustness
67 and debugging improvements to the cyrus_sasl authenticator.
69 PP/08 cyrus_sasl server now expands the server_realm option.
71 PP/09 Bugzilla 1214 - Log authentication information in reject log.
72 Patch by Jeremy Harris.
74 PP/10 Added dbmjz lookup type.
76 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
78 PP/12 MAIL args handles TAB as well as SP, for better interop with
79 non-compliant senders.
80 Analysis and variant patch by Todd Lyons.
82 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
83 Bug report from Lars Müller <lars@samba.org> (via SUSE),
84 Patch from Dirk Mueller <dmueller@suse.com>
86 PP/13 tls_peerdn now print-escaped for spool files.
87 Observed some $tls_peerdn in wild which contained \n, which resulted
88 in spool file corruption.
90 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
91 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
92 or write after TLS renegotiation, which otherwise led to messages
95 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
96 as a tracking header (ie: a signed header comes before the signature).
97 Patch from Wolfgang Breyha.
99 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
100 comma-sep list; embedded commas doubled.
102 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
104 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
106 Report and patch from Dmitry Banschikov.
108 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
109 Removed SSL_clear() after SSL_new() which led to protocol negotiation
110 failures. We appear to now support TLS1.1+ with Exim.
112 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
113 lets Exim select keys and certificates based upon TLS SNI from client.
114 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
115 before an outbound SMTP session. New log_selector, +tls_sni.
117 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
118 NULL dereference. Report and patch from Alun Jones.
120 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
121 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
122 Not seeing resolver debug output on NetBSD, but suspect this is a
123 resolver implementation change.
125 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
126 Left warnings. Added "eximon gdb" invocation mode.
128 PP/21 Defaulting "accept_8bitmime" to true, not false.
130 PP/22 Added -bw for inetd wait mode support.
132 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
133 locate the relevant includes and libraries. Made this the default.
135 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
136 Bugzilla 1246, report and most of solution from Tomasz Kusy.
138 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
139 This may cause build issues on older platforms.
141 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
142 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
143 gnutls_require_mac & gnutls_require_protocols (no longer supported).
144 Added SNI support via GnuTLS too.
145 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
147 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
149 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
150 Applied second patch from Janne, implementing suggestion to default
151 multiple-strings-in-record handling to match SPF spec.
153 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
155 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
156 read-only, out of scope).
157 Patch from Wolfgang Breyha, report from Stuart Northfield.
159 PP/29 Fix three issues highlighted by clang analyser static analysis.
160 Only crash-plausible issue would require the Cambridge-specific
161 iplookup router and a misconfiguration.
162 Report from Marcin Mirosław.
164 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
166 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
167 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
168 As part of this, removing so much warning spew let me fix some minor
169 real issues in debug logging.
171 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
172 assignment on my part. Fixed.
174 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
175 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
176 Janne Snabb (who went above and beyond: thank you).
178 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
179 string otherwise requires a connection and a bunch more work and it's
180 relatively easy to get wrong. Should also expose TLS library linkage
183 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
184 64-bit ${eval} (JH/03).
186 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
187 GNU libc to support some of the 64-bit stuff, should not lead to
188 conflicts. Defined before os.h is pulled in, so if a given platform
189 needs to override this, it can.
191 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
192 protection layer was required, which is not implemented.
193 Bugzilla 1254, patch from Wolfgang Breyha.
195 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
196 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
197 tls_dhparam take prime identifiers. Also unbreak combination of
198 OpenSSL+DH_params+TLSSNI.
200 PP/39 Disable SSLv2 by default in OpenSSL support.
206 PP/01 Solaris build fix for Oracle's LDAP libraries.
207 Bugzilla 1109, patch from Stephen Usher.
209 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
211 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
214 TF/02 Fix a couple more cases where we did not log the error message
215 when unlink() failed. See also change 4.74-TF/03.
217 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
218 lock up or crash if it happened to be inside a call to libc when it
219 got a SIGUSR1 from exiwhat.
221 The SIGUSR1 handler appends the current process status to the process
222 log which is later printed by exiwhat. It used to use the general
223 purpose logging code to do this, but several functions it calls are
224 not safe for signals.
226 The new output code in the SIGUSR1 handler is specific to the process
227 log, and simple enough that it's easy to inspect for signal safety.
228 Removing some special cases also simplifies the general logging code.
229 Removing the spurious timestamps from the process log simplifies
232 TF/04 Improved ratelimit ACL condition.
234 The /noupdate option has been deprecated in favour of /readonly which
235 has clearer semantics. The /leaky, /strict, and /readonly update modes
236 are mutually exclusive. The update mode is no longer included in the
237 database key; it just determines when the database is updated. (This
238 means that when you upgrde Exim will forget old rate measurements.)
240 Exim now checks that the per_* options are used with an update mode that
241 makes sense for the current ACL. For example, when Exim is processing a
242 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
243 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
244 must specify per_mail/readonly. If you omit the update mode it defaults to
245 /leaky where that makes sense (as before) or /readonly where required.
247 The /noupdate option is now undocumented but still supported for
248 backwards compatibility. It is equivalent to /readonly except that in
249 ACLs where /readonly is required you may specify /leaky/noupdate or
250 /strict/noupdate which are treated the same as /readonly.
252 A useful new feature is the /count= option. This is a generalization
253 of the per_byte option, so that you can measure the throughput of other
254 aggregate values. For example, the per_byte option is now equivalent
255 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
257 The per_rcpt option has been generalized using the /count= mechanism
258 (though it's more complicated than the per_byte equivalence). When it is
259 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
260 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
261 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
262 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
263 Note that using per_rcpt with a non-readonly update mode in more than
264 one ACL will cause the recipients to be double-counted. (The per_mail
265 and per_byte options don't have this problem.)
267 The handling of very low rates has changed slightly. If the computed rate
268 is less than the event's count (usually one) then this event is the first
269 after a long gap. In this case the rate is set to the same as this event's
270 count, so that the first message of a spam run is counted properly.
272 The major new feature is a mechanism for counting the rate of unique
273 events. The new per_addr option counts the number of different
274 recipients that someone has sent messages to in the last time period. It
275 behaves like per_rcpt if all the recipient addresses are different, but
276 duplicate recipient addresses do not increase the measured rate. Like
277 the /count= option this is a general mechanism, so the per_addr option
278 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
279 example, measure the rate that a client uses different sender addresses
280 with the options per_mail/unique=$sender_address. There are further
281 details in the main documentation.
283 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
285 TF/06 Removed a few PCRE remnants.
287 TF/07 Automatically extract Exim's version number from tags in the git
288 repository when doing development or release builds.
290 PP/02 Raise smtp_cmd_buffer_size to 16kB.
291 Bugzilla 879. Patch from Paul Fisher.
293 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
294 Heavily based on revision 40f9a89a from Simon Arlott's tree.
297 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
299 PP/05 Variable $av_failed, true if the AV scanner deferred.
300 Bugzilla 1078. Patch from John Horne.
302 PP/06 Stop make process more reliably on build failure.
303 Bugzilla 1087. Patch from Heiko Schlittermann.
305 PP/07 Make maildir_use_size_file an _expandable_ boolean.
306 Bugzilla 1089. Patch from Heiko Schlittermann.
308 PP/08 Handle ${run} returning more data than OS pipe buffer size.
309 Bugzilla 1131. Patch from Holger Weiß.
311 PP/09 Handle IPv6 addresses with SPF.
312 Bugzilla 860. Patch from Wolfgang Breyha.
314 PP/10 GnuTLS: support TLS 1.2 & 1.1.
316 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
319 PP/11 match_* no longer expand right-hand-side by default.
320 New compile-time build option, EXPAND_LISTMATCH_RHS.
321 New expansion conditions, "inlist", "inlisti".
323 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
325 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
327 PP/14 fix log_write() format string regression from TF/03.
328 Bugzilla 1152. Patch from Dmitry Isaikin.
334 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
336 PP/02 Harmonised TLS library version reporting; only show if debugging.
337 Layout now matches that introduced for other libraries in 4.74 PP/03.
339 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
341 PP/04 New "dns_use_edns0" global option.
343 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
346 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
347 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
349 TK/01 Updated PolarSSL code to 0.14.2.
350 Bugzilla 1097. Patch from Andreas Metzler.
352 PP/07 Catch divide-by-zero in ${eval:...}.
355 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
358 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
359 format-string attack -- SECURITY: remote arbitrary code execution.
361 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
362 time unintentionally subject to list matching rules, letting the header
363 cause arbitrary Exim lookups (of items which can occur in lists, *not*
364 arbitrary string expansion). This allowed for information disclosure.
366 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
367 INT_MIN/-1 -- value coerced to INT_MAX.
373 NM/01 Workround for PCRE version dependency in version reporting
376 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
377 This fixes portability to compilers other than gcc, notably
378 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
380 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
381 makefiles for portability to HP-UX and POSIX correctness.
383 PP/01 Permit LOOKUP_foo enabling on the make command-line.
384 Also via indented variable definition in the Makefile.
385 (Debugging by Oliver Heesakkers).
387 PP/02 Restore caching of spamd results with expanded spamd_address.
388 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
390 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
391 Improves build reliability. Fix from: Frank Elsner
393 NM/02 Fix wide character breakage in the rfc2047 coding
394 Fixes bug 1064. Patch from Andrey N. Oktyabrski
396 NM/03 Allow underscore in dnslist lookups
397 Fixes bug 1026. Patch from Graeme Fowler
399 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
400 Code patches from Adam Ciarcinski of NetBSD.
402 NM/04 Fixed exiqgrep to cope with mailq missing size issue
405 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
406 is logged, to avoid truncation. Patch from John Horne.
408 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
409 Patch from Jakob Hirsch.
411 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
412 SQL string expansion failure details.
413 Patch from Andrey Oktyabrski.
415 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
416 Patch from Simon Arlott.
418 PP/09 New lookups functionality failed to compile on old gcc which rejects
419 extern declarations in function scope.
420 Patch from Oliver Fleischmann
422 PP/10 Use sig_atomic_t for flags set from signal handlers.
423 Check getgroups() return and improve debugging.
424 Fixed developed for diagnosis in bug 927 (which turned out to be
427 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
428 Patch from Mark Zealey.
430 PP/12 Bugzilla 1056: Improved spamd server selection.
431 Patch from Mark Zealey.
433 PP/13 Bugzilla 1086: Deal with maildir quota file races.
434 Based on patch from Heiko Schlittermann.
436 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
437 Patch from Uwe Doering, sign-off by Michael Haardt.
439 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
440 variable declaration deep within a block. Bug and patch from
443 PP/15 lookups-Makefile IRIX compatibilty coercion.
445 PP/16 Make DISABLE_DKIM build knob functional.
447 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
448 Patch by Simon Arlott
450 TF/03 Fix valgrind.h portability to C89 compilers that do not support
451 variable argument macros. Our copy now differs from upstream.
457 TF/01 Failure to get a lock on a hints database can have serious
458 consequences so log it to the panic log.
460 TF/02 Log LMTP confirmation messages in the same way as SMTP,
461 controlled using the smtp_confirmation log selector.
463 TF/03 Include the error message when we fail to unlink a spool file.
465 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
466 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
467 for maintaining out-of-tree patches for some time.
469 PP/01 Bugzilla 139: Documentation and portability issues.
470 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
471 Handle per-OS dynamic-module compilation flags.
473 PP/02 Let /dev/null have normal permissions.
474 The 4.73 fixes were a little too stringent and complained about the
475 permissions on /dev/null. Exempt it from some checks.
476 Reported by Andreas M. Kirchwitz.
478 PP/03 Report version information for many libraries, including
479 Exim version information for dynamically loaded libraries. Created
480 version.h, now support a version extension string for distributors
481 who patch heavily. Dynamic module ABI change.
483 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
484 privilege escalation vulnerability whereby the Exim run-time user
485 can cause root to append content of the attacker's choosing to
488 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
491 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
492 If dropping privileges for untrusted macros, we disabled normal logging
493 on the basis that it would fail; for the Exim run-time user, this is not
494 the case, and it resulted in successful deliveries going unlogged.
495 Fixed. Reported by Andreas Metzler.
501 PP/01 Date: & Message-Id: revert to normally being appended to a message,
502 only prepend for the Resent-* case. Fixes regression introduced in
503 Exim 4.70 by NM/22 for Bugzilla 607.
505 PP/02 Include check_rfc2047_length in configure.default because we're seeing
506 increasing numbers of administrators be bitten by this.
508 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
510 PP/03 Bugzilla 994: added openssl_options main configuration option.
512 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
514 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
516 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
518 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
519 without a peer certificate, leading to a segfault because of an
520 assumption that peers always have certificates. Be a little more
521 paranoid. Problem reported by Martin Tscholak.
523 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
524 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
525 NB: ClamAV planning to remove STREAM in "middle of 2010".
526 CL also introduces -bmalware, various -d+acl logging additions and
527 more caution in buffer sizes.
529 PP/09 Implemented reverse_ip expansion operator.
531 PP/10 Bugzilla 937: provide a "debug" ACL control.
533 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
535 PP/12 Bugzilla 973: Implement --version.
537 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
539 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
541 PP/15 Bugzilla 816: support multiple condition rules on Routers.
543 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
544 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
545 ignore trailing whitespace.
547 JJ/02 prevent non-panic DKIM error from being sent to paniclog
549 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
552 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
553 Notification from Dr Andrew Aitchison.
555 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
556 ExtendedDetectionInfo response format.
557 Notification from John Horne.
559 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
562 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
563 XSL and documented dependency on system catalogs, with examples of how
566 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
569 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
570 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
571 configuration file which is writeable by the Exim user or group.
573 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
574 of configuration files to cover files specified with the -C option if
575 they are going to be used with root privileges, not just the default
578 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
579 option (effectively making it always true).
581 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
582 files to be used while preserving root privileges.
584 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
585 that rogue child processes cannot use them.
587 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
588 run-time user, instead of root.
590 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
591 Exim run-time user without dropping privileges.
593 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
594 result string, instead of calling string_vformat() twice with the same
597 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
598 for other users. Others should always drop root privileges if they use
599 -C on the command line, even for a whitelisted configure file.
601 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
603 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
609 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
610 $data_path, and $header_path variables; fixed documentation bugs and
613 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
614 exipick to access non-standard spools, including the "frozen" queue
617 NM/01 Bugzilla 965: Support mysql stored procedures.
618 Patch from Alain Williams
620 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
622 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
623 Patch from Andreas Metzler
625 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
626 Patch from Kirill Miazine
628 NM/05 Bugzilla 671: Added umask to procmail example.
630 JJ/03 installed exipick 20100323.0, fixing doc bug
632 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
633 directory. Notification and patch from Dan Rosenberg.
635 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
637 TK/02 Improve log output when DKIM signing operation fails.
639 MH/01 Treat the transport option dkim_domain as a colon separated
640 list, not as a single string, and sign the message with each element,
641 omitting multiple occurences of the same signer.
643 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
644 Bugzilla 985, 986. Patch by Simon Arlott
646 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
647 Patch by Simon Arlott
649 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
650 MBX locking. Notification from Dan Rosenberg.
656 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
658 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
660 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
662 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
664 NM/04 Bugzilla 915: Flag broken perl installation during build.
670 TK/01 Added patch by Johannes Berg that expands the main option
671 "spamd_address" if it starts with a dollar sign.
673 TK/02 Write list of recipients to X-Envelope-Sender header when building
674 the mbox-format spool file for content scanning (suggested by Jakob
677 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
678 (http://www.dcc-servers.net/) support via dccifd. Activated by
679 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
681 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
682 by Mark Daniel Reidel <mr@df.eu>.
684 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
685 When building exim an external PCRE library is now needed -
686 PCRE is a system library on the majority of modern systems.
687 See entry on PCRE_LIBS in EDITME file.
689 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
690 conversation. Added nologin parameter to request.
691 Patch contributed by Kirill Miazine.
693 TF/01 Do not log submission mode rewrites if they do not change the address.
695 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
697 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
698 log files in place. Contributed by Roberto Lima.
700 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
702 TF/03 Bugzilla 615: When checking the local_parts router precondition
703 after a local_part_suffix or local_part_prefix option, Exim now
704 does not use the address's named list lookup cache, since this
705 contains cached lookups for the whole local part.
707 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
708 Robert Millan. Documentation is in experimental-spec.txt.
710 TF/04 Bugzilla 668: Fix parallel build (make -j).
712 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
714 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
715 Patch provided by Jan Srzednicki.
717 TF/05 Leading white space used to be stripped from $spam_report which
718 wrecked the formatting. Now it is preserved.
720 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
721 that they are available at delivery time.
723 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
725 TF/08 TLS error reporting now respects the incoming_interface and
726 incoming_port log selectors.
728 TF/09 Produce a more useful error message if an SMTP transport's hosts
729 setting expands to an empty string.
731 NM/06 Bugzilla 744: EXPN did not work under TLS.
732 Patch provided by Phil Pennock.
734 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
735 Patch provided by Richard Godbee.
737 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
738 acl_smtp_notquit, added index entry.
740 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
741 Patch provided by Eugene Bujak.
743 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
744 accept(). Patch provided by Maxim Dounin.
746 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
747 Patch provided by Phil Pennock.
749 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
751 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
752 Patch provided by Brad "anomie" Jorsch.
754 NM/14 Bugzilla 622: Added timeout setting to transport filter.
755 Patch provided by Dean Brooks.
757 TK/05 Add native DKIM support (does not depend on external libraries).
759 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
760 Patch provided by Graeme Fowler.
762 NM/16 Bugzilla 851: Documentation example syntax fix.
764 NM/17 Changed NOTICE file to remove references to embedded PCRE.
766 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
769 NM/19 Bugzilla 745: TLS version reporting.
770 Patch provided by Phil Pennock.
772 NM/20 Bugzilla 167: bool: condition support.
773 Patch provided by Phil Pennock.
775 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
776 clients. Patch provided by Phil Pennock.
778 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
779 Patch provided by Brad "anomie" Jorsch.
781 NM/23 Bugzilla 687: Fix misparses in eximstats.
782 Patch provided by Heiko Schlittermann.
784 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
785 Patch provided by Heiko Schlittermann.
787 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
788 plus update to original patch.
790 NM/26 Bugzilla 799: Documentation correction for ratelimit.
792 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
793 Patch provided by David Brownlee.
795 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
797 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
799 NM/30 Bugzilla 888: TLS documentation bugfixes.
801 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
803 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
804 Unlike the original bugzilla I have changed all shell scripts in src tree.
806 NM/33 Bugzilla 898: Transport filter timeout fix.
807 Patch by Todd Rinaldo.
809 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
810 Patch by Serge Demonchaux.
812 NM/35 Bugzilla 39: Base64 decode bug fixes.
813 Patch by Jakob Hirsch.
815 NM/36 Bugzilla 909: Correct connect() call in dcc code.
817 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
819 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
821 NM/39 Bugzilla 911: Fixed MakeLinks build script.
827 TK/01 Add preliminary DKIM support. Currently requires a forked version of
828 ALT-N's libdkim that I have put here:
829 http://duncanthrax.net/exim-experimental/
831 Note to Michael Haardt: I had to rename some vars in sieve.c. They
832 were called 'true' and it seems that C99 defines that as a reserved
833 keyword to be used with 'bool' variable types. That means you could
834 not include C99-style headers which use bools without triggering
835 build errors in sieve.c.
837 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
838 as mailq or other aliases. Changed the --help handling significantly
839 to do whats expected. exim_usage() emits usage/help information.
841 SC/01 Added the -bylocaldomain option to eximstats.
843 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
845 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
847 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
853 PH/01 Another patch from the Sieve maintainer.
855 PH/02 When an IPv6 address is converted to a string for single-key lookup
856 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
857 dots are used instead of colons so that keys in lsearch files need not
858 contain colons. This was done some time before quoting was made available
859 in lsearch files. However, iplsearch files do require colons in IPv6 keys
860 (notated using the quote facility) so as to distinguish them from IPv4
861 keys. This meant that lookups for IP addresses in host lists did not work
862 for iplsearch lookups.
864 This has been fixed by arranging for IPv6 addresses to be expressed with
865 colons if the lookup type is iplsearch. This is not incompatible, because
866 previously such lookups could never work.
868 The situation is now rather anomolous, since one *can* have colons in
869 ordinary lsearch keys. However, making the change in all cases is
870 incompatible and would probably break a number of configurations.
872 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
875 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
876 conversion specification without a maximum field width, thereby enabling
877 a rogue spamd server to cause a buffer overflow. While nobody in their
878 right mind would setup Exim to query an untrusted spamd server, an
879 attacker that gains access to a server running spamd could potentially
880 exploit this vulnerability to run arbitrary code as the Exim user.
882 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
883 $primary_hostname instead of what libspf2 thinks the hosts name is.
885 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
886 a directory entry by the name of the lookup key. Previously, if a
887 symlink pointed to a non-existing file or a file in a directory that
888 Exim lacked permissions to read, a lookup for a key matching that
889 symlink would fail. Now it is enough that a matching directory entry
890 exists, symlink or not. (Bugzilla 503.)
892 PH/03 The body_linecount and body_zerocount variables are now exported in the
895 PH/04 Added the $dnslist_matched variable.
897 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
898 This means they are set thereafter only if the connection becomes
901 PH/06 Added the client_condition to authenticators so that some can be skipped
902 by clients under certain conditions.
904 PH/07 The error message for a badly-placed control=no_multiline_responses left
905 "_responses" off the end of the name.
907 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
909 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
910 (without spaces) instead of just copying the configuration text.
912 PH/10 Added the /noupdate option to the ratelimit ACL condition.
914 PH/11 Added $max_received_linelength.
916 PH/12 Added +ignore_defer and +include_defer to host lists.
918 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
919 way in which PCRE > 7.0 is built.
921 PH/14 Implemented queue_only_load_latch.
923 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
924 MAIL command. The effect was to mangle the value on 64-bit systems.
926 PH/16 Another patch from the Sieve maintainer.
928 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
930 PH/18 If a system quota error occurred while trying to create the file for
931 a maildir delivery, the message "Mailbox is full" was not appended to the
932 bounce if the delivery eventually timed out. Change 4.67/27 below applied
933 only to a quota excession during the actual writing of the file.
935 PH/19 It seems that peer DN values may contain newlines (and other non-printing
936 characters?) which causes problems in log lines. The DN values are now
937 passed through string_printing() before being added to log lines.
939 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
940 and InterBase are left for another time.)
942 PH/21 Added message_body_newlines option.
944 PH/22 Guard against possible overflow in moan_check_errorcopy().
946 PH/23 POSIX allows open() to be a macro; guard against that.
948 PH/24 If the recipient of an error message contained an @ in the local part
949 (suitably quoted, of course), incorrect values were put in $domain and
950 $local_part during the evaluation of errors_copy.
956 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
957 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
960 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
961 issue a MAIL command.
963 PH/02 In an ACL statement such as
965 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
967 if a client was not listed at all, or was listed with a value other than
968 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
969 the condition was not true (as it should be), so access was not denied.
970 The bug was that the ! inversion was incorrectly passed on to the second
971 item. This has been fixed.
973 PH/03 Added additional dnslists conditions == and =& which are different from
974 = and & when the dns lookup returns more than one IP address.
976 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
977 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
979 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
980 FSYNC, which compiles an option called disable_fsync that allows for
981 bypassing fsync(). The documentation is heavily laced with warnings.
983 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
985 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
986 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
987 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
988 including adding "make clean"; (3) Added -fPIC when compiling the test
989 dynamically loaded module, to get rid of a warning.
991 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
992 message fails, move_frozen_messages = true and ignore_bounce_errors_after
993 = 0s. The bug is otherwise harmless.
995 PH/07 There was a bug in the dovecot authenticator such that the value of
996 $auth1 could be overwritten, and so not correctly preserved, after a
997 successful authentication. This usually meant that the value preserved by
998 the server_setid option was incorrect.
1000 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1002 PH/09 Installed PCRE release 7.0.
1004 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1005 run for batched SMTP input. It is now run at the start of every message
1006 in the batch. While fixing this I discovered that the process information
1007 (output by running exiwhat) was not always getting set for -bs and -bS
1008 input. This is fixed, and it now also says "batched" for BSMTP.
1010 PH/11 Added control=no_pipelining.
1012 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1013 patch, slightly modified), and move the expansion of helo_data till after
1014 the connection is made in the smtp transport (so it can use these
1017 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1019 PH/14 Added log_selector = +pid.
1021 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1023 PH/16 Add ${if forany and ${if forall.
1025 PH/17 Added dsn_from option to vary the From: line in DSNs.
1027 PH/18 Flush SMTP output before performing a callout, unless control =
1028 no_callout_flush is set.
1030 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1031 was true (the default) a successful delivery failed to delete the retry
1032 item, thus causing premature timeout of the address. The bug is now
1035 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1037 PH/21 Long custom messages for fakedefer and fakereject are now split up
1038 into multiline reponses in the same way that messages for "deny" and
1039 other ACL rejections are.
1041 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1042 with slight modification.
1044 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1045 draft, changing the syntax and factoring some duplicate code".
1047 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1048 for deliveries of the second and subsequent messages over the same SMTP
1051 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1052 ${reduce, with only minor "tidies".
1054 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1056 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1057 expansion side effects.
1059 PH/27 When a message times out after an over-quota error from an Exim-imposed
1060 quota, the bounce message says "mailbox is full". This message was not
1061 being given when it was a system quota that was exceeded. It now should
1064 MH/03 Made $recipients available in local_scan(). local_scan() already has
1065 better access to the recipient list through recipients_list[], but
1066 $recipients can be useful in postmaster-provided expansion strings.
1068 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1069 in the case of a MAIL command with additional options following the
1070 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1071 were accidentally chopped off.
1073 PH/29 SMTP synchronization checks are implemented when a command is read -
1074 there is a check that no more input is waiting when there shouldn't be
1075 any. However, for some commands, a delay in an ACL can mean that it is
1076 some time before the response is written. In this time, more input might
1077 arrive, invalidly. So now there are extra checks after an ACL has run for
1078 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1079 pipelining has not been advertised.
1081 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1083 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1084 returned in the SMTP response when smtp_return_error_details was false.
1085 This has been fixed.
1087 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1088 instead of the C I/O that was originally supplied, because problems were
1089 reported on Solaris.
1091 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1092 Exim which did not show up earlier: it was assuming that a call to
1093 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1094 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1095 was a macro that became an assignment, so it seemed to work. This has
1096 changed to a proper function call with a void return, hence the compile
1097 error. Exim's code has been fixed.
1099 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1102 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1104 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1106 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1107 because it turns out to be too big or there is a timeout) there is no
1108 "Completed" line in the log. When some messages of this type were
1109 selected by exigrep, they were listed as "not completed". Others were
1110 picked up by some special patterns. I have improved the selection
1111 criteria to be more general.
1113 PH/38 The host_find_failed option in the manualroute router can now be set
1114 to "ignore", to completely ignore a host whose IP address cannot be
1115 found. If all hosts are ignored, the behaviour is controlled by the new
1116 host_all_ignored option.
1118 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1119 homing or because of multiple MX records with /mx) generated more than
1120 one IP address, and the following item turned out to be the local host,
1121 all the secondary addresses of the first item were incorrectly removed
1122 from the list, along with the local host and any following hosts (which
1123 is what is supposed to happen).
1125 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1126 whoever called Exim into the -H file. In the case of the daemon it was
1127 behaving confusingly. When first started, it used values for whoever
1128 started the daemon, but after a SIGHUP it used the Exim user (because it
1129 calls itself on a restart). I have changed the code so that it now always
1132 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1133 message are rejected with the same error (e.g. no authentication or bad
1134 sender address), and a DATA command is nevertheless sent (as can happen
1135 with PIPELINING or a stupid MUA), the error message that was given to the
1136 RCPT commands is included in the rejection of the DATA command. This is
1137 intended to be helpful for MUAs that show only the final error to their
1140 PH/42 Another patch from the Sieve maintainer.
1142 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1143 Eximstats - Fixed some broken HTML links and added missing column headers
1145 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1146 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1148 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1150 PH/43 Yet another patch from the Sieve maintainer.
1152 PH/44 I found a way to check for a TCP/IP connection going away before sending
1153 the response to the final '.' that terminates a message, but only in the
1154 case where the client has not sent further data following the '.'
1155 (unfortunately, this is allowed). However, in many cases there won't be
1156 any further data because there won't be any more messages to send. A call
1157 to select() can be used: if it shows that the input is "ready", there is
1158 either input waiting, or the socket has been closed. An attempt to read
1159 the next input character can distinguish the two cases. Previously, Exim
1160 would have sent an OK response which the client would never have see.
1161 This could lead to message repetition. This fix should cure that, at
1162 least in a lot of common cases.
1164 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1165 advertised in response to EHLO.
1171 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1172 fixed by 4.65/MH/01 (is this a record?) are fixed:
1174 (i) An empty string was always treated as zero by the numeric comparison
1175 operators. This behaviour has been restored.
1177 (ii) It is documented that the numeric comparison operators always treat
1178 their arguments as decimal numbers. This was broken in that numbers
1179 starting with 0 were being interpreted as octal.
1181 While fixing these problems I realized that there was another issue that
1182 hadn't been noticed. Values of message_size_limit (both the global option
1183 and the transport option) were treated as octal if they started with 0.
1184 The documentation was vague. These values are now always treated as
1185 decimal, and I will make that clear in the documentation.
1191 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1192 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1195 MH/01 Don't check that the operands of numeric comparison operators are
1196 integers when their expansion is in "skipping" mode (fixes bug
1197 introduced by 4.64-PH/07).
1199 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1200 child addresses, Exim now panics and dies. Previously, because the count
1201 is held in a short int, deliveries were likely to be lost. As such a
1202 large number of recipients for a single message is ridiculous
1203 (performance will be very, very poor), I have chosen to impose a limit
1204 rather than extend the field.
1210 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1211 leftover -K file (the existence of which was triggered by #402).
1212 While we were at it, introduced process PID as part of the -K
1213 filename. This should rule out race conditions when creating
1216 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1217 processing considerably. Previous code took too long for large mails,
1218 triggering a timeout which in turn triggers #401.
1220 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1221 in the DK code in transports.c. sendfile() is not really portable,
1222 hence the _LINUX specificness.
1224 TF/01 In the add_headers option to the mail command in an Exim filter,
1225 there was a bug that Exim would claim a syntax error in any
1226 header after the first one which had an odd number of characters
1229 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1230 callout verification, Exim cached a "reject" for the entire domain. This
1231 is correct for most verifications, but it is not correct for a recipient
1232 verification with use_sender or use_postmaster set, because in that case
1233 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1234 case of MAIL FROM:<> rejection from other early rejections (e.g.
1235 rejection of HELO). When verifying a recipient using a non-null MAIL
1236 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1237 Whatever the result of the callout, the value of the domain cache is
1238 left unchanged (for any other kind of callout, getting as far as trying
1239 RCPT means that the domain itself is ok).
1241 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1244 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1245 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1246 session, the daemon ignores ECONNECT errors and logs others; it now
1247 ignores EPIPE as well.
1249 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1250 (quoted-printable decoding).
1252 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1253 later the small subsequent patch to fix an introduced bug.
1255 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1257 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1259 PH/08 An error is now given if message_size_limit is specified negative.
1261 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1262 to be given (somewhat) arbitrary names.
1264 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1267 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1268 miscellaneous code fixes
1270 PH/10 Added the log_reject_target ACL modifier to specify where to log
1273 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1274 hostname. This is wrong, because it relates to the incoming message (and
1275 probably the interface on which it is arriving) and not to the outgoing
1276 callout (which could be using a different interface). This has been
1277 changed to use the value of the helo_data option from the smtp transport
1278 instead - this is what is used when a message is actually being sent. If
1279 there is no remote transport (possible with a router that sets up host
1280 addresses), $smtp_active_hostname is used.
1282 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1283 tweaks were necessary in order to get it to work (see also 21 below):
1284 (a) The code assumed that strncpy() returns a negative number on buffer
1285 overflow, which isn't the case. Replaced with Exim's string_format()
1287 (b) There were several signed/unsigned issues. I just did the minimum
1288 hacking in of casts. There is scope for a larger refactoring.
1289 (c) The code used strcasecmp() which is not a standard C function.
1290 Replaced with Exim's strcmpic() function.
1291 (d) The code set only $1; it now sets $auth1 as well.
1292 (e) A simple test gave the error "authentication client didn't specify
1293 service in request". It would seem that Dovecot has changed its
1294 interface. Fortunately there's a specification; I followed it and
1295 changed what the client sends and it appears to be working now.
1297 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1300 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1301 address A is aliased to B and C, where B exists and C does not. Without
1302 -v the output is "A verified" because verification stops after a
1303 successful redirection if more than one address is generated. However,
1304 with -v the child addresses are also verified. Exim was outputting "A
1305 failed to verify" and then showing the successful verification for C,
1306 with its parentage. It now outputs "B failed to verify", showing B's
1307 parentage before showing the successful verification of C.
1309 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1310 look up a TXT record in a specific list after matching in a combined
1313 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1314 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1315 they consult the DNS. I had assumed they would set it the way they
1316 wanted; and indeed my experiments on Linux seem to show that in some
1317 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1318 To be on the safe side, however, I have now made the interface to
1319 host_find_byname() similar to host_find_bydns(), with an argument
1320 containing the DNS resolver options. The host_find_byname() function now
1321 sets these options at its start, just as host_find_bydns() does. The smtp
1322 transport options dns_qualify_single and dns_search_parents are passed to
1323 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1324 of host_find_byname() use the default settings of RES_DEFNAMES
1325 (qualify_single) but not RES_DNSRCH (search_parents).
1327 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1328 spool_read_header() do less string testing, by means of a preliminary
1329 switch on the second character of optional "-foo" lines. (This is
1330 overdue, caused by the large number of possibilities that now exist.
1331 Originally there were few.) While I was there, I also converted the
1332 str(n)cmp tests so they don't re-test the leading "-" and the first
1333 character, in the hope this might squeeze out yet more improvement.
1335 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1336 flag allowing group syntax was set by the header_syntax check but not
1337 turned off, possible causing trouble later; (2) The flag was not being
1338 set at all for the header_verify test, causing "group"-style headers to
1339 be rejected. I have now set it in this case, and also caused header_
1340 verify to ignore an empty address taken from a group. While doing this, I
1341 came across some other cases where the code for allowing group syntax
1342 while scanning a header line wasn't quite right (mostly, not resetting
1343 the flag correctly in the right place). These bugs could have caused
1344 trouble for malformed header lines. I hope it is now all correct.
1346 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1347 with the "reply" argument non-NULL. The code, however (which originally
1348 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1349 but it didn't always do it. This confused somebody who was copying the
1350 code for some other use. I have removed all the tests.
1352 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1353 feature that was used to support insecure browsers during the U.S. crypto
1354 embargo. It requires special client support, and Exim is probably the
1355 only MTA that supported it -- and would never use it because real RSA is
1356 always available. This code has been removed, because it had the bad
1357 effect of slowing Exim down by computing (never used) parameters for the
1358 RSA_EXPORT functionality.
1360 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1361 authenticator to fail if there's a tab character in the incoming data
1362 (there should never be unless someone is messing about, as it's supposed
1363 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1364 if the connection is using TLS or if the remote IP is the same as the
1365 local IP, and the "valid-client-cert option" if a client certificate has
1368 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1369 authenticators. This can be used for authorization after authentication
1370 succeeds. (In the case of plaintext, it servers for both authentication
1373 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1374 if any retry times were supplied.
1376 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1377 connection, where there is no client IP address to check. In this
1378 situation, the verify now always succeeds.
1380 PH/25 Applied John Jetmore's -Mset patch.
1382 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1384 PH/27 In a string expansion for a processed (not raw) header when multiple
1385 headers of the same name were present, leading whitespace was being
1386 removed from all of them, but trailing whitespace was being removed only
1387 from the last one. Now trailing whitespace is removed from each header
1388 before concatenation. Completely empty headers in a concatenation (as
1389 before) are ignored.
1391 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1392 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1394 PH/29 [Removed. This was a change that I later backed out, and forgot to
1395 correct the ChangeLog entry (that I had efficiently created) before
1396 committing the later change.]
1398 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1399 address errors (4xx response to RCPT) over the same connection as other
1400 messages routed to the same hosts. Such deliveries are always "forced",
1401 so retry times are not inspected. This resulted in far too many retries
1402 for the affected addresses. The effect occurred only when there were more
1403 hosts than the hosts_max_try setting in the smtp transport when it had
1404 the 4xx errors. Those hosts that it had tried were not added to the list
1405 of hosts for which the message was waiting, so if all were tried, there
1406 was no problem. Two fixes have been applied:
1408 (i) If there are any address or message errors in an SMTP delivery, none
1409 of the hosts (tried or untried) are now added to the list of hosts
1410 for which the message is waiting, so the message should not be a
1411 candidate for sending over the same connection that was used for a
1412 successful delivery of some other message. This seems entirely
1413 reasonable: after all the message is NOT "waiting for some host".
1414 This is so "obvious" that I'm not sure why it wasn't done
1415 previously. Hope I haven't missed anything, but it can't do any
1416 harm, as the worst effect is to miss an optimization.
1418 (ii) If, despite (i), such a delivery is accidentally attempted, the
1419 routing retry time is respected, so at least it doesn't keep
1420 hammering the server.
1422 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1423 in ${readsocket because some servers need this prod.
1425 PH/32 Added some extra debug output when updating a wait-xxx database.
1427 PH/33 The hint "could be header name not terminated by colon", which has been
1428 given for certain expansion errors for a long time, was not being given
1429 for the ${if def:h_colon_omitted{... case.
1431 PH/34 The spec says: "With one important exception, whenever a domain list is
1432 being scanned, $domain contains the subject domain." There was at least
1433 one case where this was not true.
1435 PH/35 The error "getsockname() failed: connection reset by peer" was being
1436 written to the panic log as well as the main log, but it isn't really
1437 panic-worthy as it just means the connection died rather early on. I have
1438 removed the panic log writing for the ECONNRESET error when getsockname()
1441 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1442 runs only) independently of the message's sender address. This meant
1443 that, if the 4xx error was in fact related to the sender, a different
1444 message to the same recipient with a different sender could confuse
1445 things. In particualar, this can happen when sending to a greylisting
1446 server, but other circumstances could also provoke similar problems.
1447 I have changed the default so that the retry time for these errors is now
1448 based a combination of the sender and recipient addresses. This change
1449 can be overridden by setting address_retry_include_sender=false in the
1452 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1453 remote server are returned as part of bounce messages. This was not
1454 happening for LMTP over a pipe (the lmtp transport), but now it is the
1455 same for both kinds of LMTP.
1457 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1458 in header lines that were in fact CNAMEs. This is no longer the case.
1460 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1461 and queue runs started by the daemon processed all messages. This has
1462 been fixed so that -R and -S can now usefully be given with -q<time>.
1464 PH/40 Import PCRE release 6.7 (fixes some bugs).
1466 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1468 PH/42 Give an error if -q is specified more than once.
1470 PH/43 Renamed the variables $interface_address and $interface_port as
1471 $received_ip_address and $received_port, to make it clear that these
1472 values apply to message reception, and not to the outgoing interface when
1473 a message is delivered. (The old names remain recognized, of course.)
1475 PH/44 There was no timeout on the connect() call when using a Unix domain
1476 socket in the ${readsocket expansion. There now is.
1478 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1479 be meaningful with "accept".
1481 SC/01 Eximstats V1.43
1482 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1484 SC/02 Eximstats V1.44
1485 Use a glob alias rather than an array ref in the generated
1486 parser. This improves both readability and performance.
1488 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1489 Collect SpamAssassin and rejection statistics.
1490 Don't display local sender or destination tables unless
1491 there is data to show.
1492 Added average volumes into the top table text output.
1494 SC/04 Eximstats V1.46
1495 Collect data on the number of addresses (recipients)
1496 as well as the number of messages.
1498 SC/05 Eximstats V1.47
1499 Added 'Message too big' to the list of mail rejection
1500 reasons (thanks to Marco Gaiarin).
1502 SC/06 Eximstats V1.48
1503 Mainlog lines which have GMT offsets and are too short to
1504 have a flag are now skipped.
1506 SC/07 Eximstats V1.49 (Alain Williams)
1507 Added the -emptyok flag.
1509 SC/08 Eximstats V1.50
1510 Fixes for obtaining the IP address from reject messages.
1512 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1513 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1514 whitesspace changes from 4.64-PH/27
1516 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1519 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1520 are found, allow negative numbers in numeric criteria)
1522 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1524 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1525 to match changes made in 4.64-PH/43
1527 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1529 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1530 "domain" is actually an IP address, and force a failure. This locks out
1531 those revolvers/nameservers that support "A-for-A" lookups, in
1532 contravention of the specifications.
1534 PH/48 When a host name was looked up from an IP address, and the subsequent
1535 forward lookup of the name timed out, the host name was left in
1536 $sender_host_name, contrary to the specification.
1538 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1539 restricted to single-key lookups, Exim was not diagnosing an error if
1540 * or *@ was used with a query-style lookup.
1542 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1544 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1545 long ago, but noone interested enough thought of it. Let's just say that
1546 the "1.1" means that there are some new functions that weren't there at
1547 some point in the past.
1549 PH/51 Error processing for expansion failure of helo_data from an smtp
1550 transport during callout processing was broken.
1552 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1553 tested/used via the -bh/-bhc/-bs options.
1555 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1556 bug, fixed in subsequent PCRE releases).
1558 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1559 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1561 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1567 SC/01 Use a glob alias rather than an array ref in eximstats generated
1568 parser. This improves both readability and performance.
1570 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1571 Don't display local sender or destination tables in eximstats unless
1572 there is data to show.
1573 Added average volumes into the eximstats top table text output.
1575 SC/03 Collect data on the number of addresses (recipients) as well
1576 as the number of messages in eximstats.
1578 TF/01 Correct an error in the documentation for the redirect router. Exim
1579 does (usually) call initgroups() when daemonizing.
1581 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1582 with consistent privilege compared to when running as a daemon.
1584 TF/03 Note in the spec that $authenticated_id is not set for local
1585 submissions from trusted users.
1587 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1588 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1590 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1591 by adding some example configuration directives to the default
1592 configuration file. A little bit of work is required to uncomment the
1593 directives and define how usernames and passwords are checked, but
1594 there is now a framework to start from.
1596 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1597 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1598 without this. I don't know how relevant this is to other LDAP libraries.
1600 PH/02 Add the verb name to the "unknown ACL verb" error.
1602 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1604 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1606 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1607 directory not expanded when it should be if an expanded home directory
1608 was set for the address (which is overridden by the transport).
1610 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1613 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1614 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1615 because it is too late at that time, and has no effect.
1617 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1618 security issue with \' (bugzilla #107). I could not use the
1619 PQescapeStringConn() function, because it needs a PGconn value as one of
1622 PH/08 When testing addresses using -bt, indicate those final addresses that
1623 are duplicates that would not cause an additional delivery. At least one
1624 person was confused, thinking that -bt output corresponded to deliveries.
1625 (Suppressing duplicates isn't a good idea as you lose the information
1626 about possibly different redirections that led to the duplicates.)
1628 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1629 systems where poll() doesn't work, in particular OS X.
1631 PH/10 Added more information to debugging output for retry time not reached.
1633 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1634 operations in malware.c.
1636 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1639 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1640 syslog_duplication set false, log lines that would normally be written
1641 both the the main log and to the reject log were not written to syslog at
1644 PH/14 In the default configuration, change the use of "message" in ACL warn
1645 statements to "add_header".
1647 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1648 not followed by a command (e.g. "seen endif").
1650 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1651 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1654 PH/17 Added extra conditions to the default value of delay_warning_condition
1658 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1659 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1660 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1663 The Auto-Submitted: and various List- headers are standardised, whereas I
1664 don't think Precedence: ever was.
1666 PH/18 Refactored debugging code in route_finduser() to show more information,
1667 in particular, the error code if getpwnam() issues one.
1669 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1670 This is apparently needed in addition to the PH/07 change above to avoid
1671 any possible encoding problems.
1673 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1674 but not after initializing Perl.
1676 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1677 output them only if debugging. By default they are written stderr,
1678 apparently, which is not desirable.
1680 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1683 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1686 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1688 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1689 authenticated or an ident call has been made. Suppress the default
1690 values for $authenticated_id and $authenticated_sender (but permit -oMai
1691 and -oMas) when testing with -bh.
1693 PH/24 Re-jigged the order of the tests in the default configuration so that the
1694 tests for valid domains and recipients precede the DNS black list and CSA
1695 tests, on the grounds that those ones are more expensive.
1697 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1698 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1699 This bug exists in every version of Exim that I still have, right back to
1702 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1703 However, an attempt to turn on case-sensitivity in a regex key by
1704 including (?-i) didn't work because the subject string was already
1705 lowercased, and the effects were non-intuitive. It turns out that a
1706 one-line patch can be used to allow (?-i) to work as expected.
1712 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1713 other effects) broke the use of negated acl sub-conditions.
1715 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1718 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1719 "Deny" causes Exim to reject the incoming connection with a 554 error.
1720 Unfortunately, if there is a major crisis, such as a disk failure,
1721 tcp-wrappers gives "deny", whereas what one would like would be some
1722 kind of temporary error. A kludge has been added to help with this.
1723 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1724 554 error is used if errno is still zero or contains ENOENT (which occurs
1725 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1728 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1730 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1731 errors. Otherwise a message that provokes a temporary error (when other
1732 messages do not) can cause a whole host to time out.
1734 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1735 addresses were routed directly to files or pipes from a redirect router.
1736 File deliveries just didn't batch; pipe deliveries might have suffered
1739 PH/06 A failure to get a lock for a hints database would erroneously always say
1740 "Failed to get write lock", even when it was really a read lock.
1742 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1743 of 0600. This has been changed to use the value of the lockfile_mode
1744 option (which defaults to 0600).
1746 PH/08 Applied small patch from the Sieve maintainer.
1748 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1749 folder from quota calculations, a direct delivery into this folder messed
1750 up the contents of the maildirsize file. This was because the regex was
1751 used only to exclude .Trash (or whatever) when the size of the mailbox
1752 was calculated. There was no check that a delivery was happening into an
1753 excluded directory. This bug has been fixed by ignoring all quota
1754 processing for deliveries into excluded directories.
1756 PH/10 Added the maildirfolder_create_regex option to appendfile.
1762 PH/01 The code for finding all the local interface addresses on a FreeBSD
1763 system running IPv6 was broken. This may well have applied to all BSD
1764 systems, as well as to others that have similar system calls. The broken
1765 code found IPv4 interfaces correctly, but gave incorrect values for the
1766 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1767 that it would not match correctly against @[] and not recognize the IPv6
1770 PH/02 The ipliteral router was not recognizing addresses of the form user@
1771 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1773 PH/03 Added disable_ipv6.
1775 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1776 decoded form, because it is most often used to construct To: headers
1777 lines in autoreplies, and the decoded form may well be syntactically
1778 invalid. However, $reply_address has leading white space removed, and all
1779 newlines turned into spaces so that the autoreply transport does not
1782 PH/05 If group was specified without a user on a router, and no group or user
1783 was specified on a transport, the group from the router was ignored.
1785 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1786 for visible compile-time settings that can be used to change these
1787 numbers, for those that want even more. Backwards compatibility with old
1788 spool files has been maintained. However, going back to a previous Exim
1789 release will lost any variables that are in spool files.
1791 PH/07 Two small changes when running in the test harness: increase delay when
1792 passing a TCP/IP connection to a new process, in case the original
1793 process has to generate a bounce, and remove special handling of
1794 127.0.0.2 (sic), which is no longer necessary.
1796 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1797 be the same on different OS.
1799 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1802 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1803 whether --show-vars was specified or not
1805 JJ/02 exipick: Added support for new ACL variable spool format introduced
1808 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1809 syntactically invalid From: or Reply-to: line, and a filter used this to
1810 generate an autoreply, and therefore failed to obtain an address for the
1811 autoreply, Exim could try to deliver to a non-existent relative file
1812 name, causing unrelated and misleading errors. What now happens is that
1813 it logs this as a hard delivery error, but does not attempt to create a
1816 PH/11 The exinext utility has a -C option for testing purposes, but although
1817 the given file was scanned by exinext itself; it wasn't being passed on
1818 when Exim was called.
1820 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1821 an end-of-file indication when reading a command response.
1823 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1824 compiled. In many other places in Exim, IPv6 addresses are always
1825 recognized, so I have changed this. It also means that IPv4 domain
1826 literals of the form [IPV4:n.n.n.n] are now always recognized.
1828 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1829 used if the router is not running as root, for example, when verifying at
1830 ACL time, or when using -bh. The debugging output from this situation was
1831 non-existent - all you got was a failure to exec. I have made two
1834 (a) Failures to set uid/gid, the current directory, or a process leader
1835 in a subprocess such as that created by queryprogram now generate
1836 suitable debugging ouput when -d is set.
1838 (b) The queryprogram router detects when it is not running as root,
1839 outputs suitable debugging information if -d is set, and then runs
1840 the subprocess without attempting to change uid/gid.
1842 PH/15 Minor change to Makefile for building test_host (undocumented testing
1845 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1846 additional section of a DNS packet that returns MX or SRV records.
1847 Instead, it always explicitly searches for A/AAAA records. This avoids
1848 major problems that occur when a DNS server includes only records of one
1849 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1850 fixed another bug: if SRV records were looked up and the corresponding
1851 address records were *not* found in the additional section, the port
1852 values from the SRV records were lost.
1854 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1855 using the correct key (the original address) when searching the retry
1856 rules in order to find which one to use for generating the retry hint.
1858 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1859 adding the default one. Similarly, if it contains a Reply-To: header, the
1860 errors_reply_to option, if set, is not used.
1862 PH/19 When calculating a retry time, Exim used to measure the "time since
1863 failure" by looking at the "first failed" field in the retry record. Now
1864 it does not use this if it is later than than the arrival time of the
1865 message. Instead it uses the arrival time. This makes for better
1866 behaviour in cases where some deliveries succeed, thus re-setting the
1867 "first failed" field. An example is a quota failure for a huge message
1868 when small messages continue to be delivered. Without this change, the
1869 "time since failure" will always be short, possible causing more frequent
1870 delivery attempts for the huge message than are intended.
1871 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1873 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1874 $1, $2, $3) because the numerical variables can be reset during some
1875 expansion items (e.g. "match"), thereby losing the authentication data.
1877 PH/21 Make -bV show the size of off_t variables so that the test suite can
1878 decide whether to run tests for quotas > 2G.
1880 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1881 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1882 filecount value is greater than 2G or if a quota value is greater than 2G
1883 on a system where the size of off_t is not greater than 4, a panic error
1886 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1887 never match. The debug and -bh output now contains an explicit error
1888 message indicating a malformed IPv4 address or mask.
1890 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1891 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1892 PH/23 above applies.
1894 PH/25 Do not write to syslog when running in the test harness. The only
1895 occasion when this arises is a failure to open the main or panic logs
1896 (for which there is an explicit test).
1898 PH/26 Added the /no_tell option to "control=freeze".
1900 PH/27 If a host name lookup failed very early in a connection, for example, if
1901 the IP address matched host_lookup and the reverse lookup yielded a name
1902 that did not have a forward lookup, an error message of the form "no IP
1903 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1904 could be logged. Now it outputs the IP address instead of "NULL".
1906 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1907 allows the sender and the authenticated sender to be set when
1908 submitting a message from within Exim. Since child_open_exim() is
1909 documented for local_scan(), the new function should be too.
1911 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1912 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1913 results in an empty string is now treated as unset.
1915 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1917 PH/31 Added sender_verify_fail logging option.
1919 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1920 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1921 tidied the source and removed it altogether.
1923 PH/33 When a queue run was abandoned because the load average was too high, a
1924 log line was always written; now it is written only if the queue_run log
1925 selector is set. In addition, the log line for abandonment now contains
1926 information about the queue run such as the pid. This is always present
1927 in "start" and "stop" lines but was omitted from the "abandon" line.
1929 PH/34 Omit spaces between a header name and the colon in the error message that
1930 is given when verify = headers_syntax fails (if there are lots of them,
1931 the message gets confusing).
1933 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1934 names, as there are now some PTR records that contain slashes. This check
1935 is only to protect against broken name servers that fall over on strange
1936 characters, so the fact that it applies to all lookups doesn't matter.
1938 PH/36 Now that the new test suite is complete, we can remove some of the
1939 special code in Exim that was needed for the old test suite. For example,
1940 sorting DNS records because real resolvers return them in an arbitrary
1941 order. The new test suite's fake resolver always returns records in the
1944 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1945 bounces) except when queue_only is set, to avoid logging races between
1946 the different processes.
1948 PH/38 Panic-die if .include specifies a non-absolute path.
1950 PH/39 A tweak to the "H" retry rule from its user.
1952 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1953 a label. They prevented compilation on older perls.
1955 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1956 a warning to be raised on newish perls.
1958 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1959 on queue. Changes to match documented behaviour of showing count of
1960 messages matching specified criteria.
1962 PH/40 Changed the default ident timeout from 30s to 5s.
1964 PH/41 Added support for the use of login_cap features, on those BSD systems
1965 that have them, for controlling the resources used by pipe deliveries.
1967 PH/42 The content-scanning code uses fopen() to create files in which to put
1968 message data. Previously it was not paying any attention to the mode of
1969 the files. Exim runs with umask(0) because the rest of the code creates
1970 files with open(), and sets the required mode explicitly. Thus, these
1971 files were ending up world-writeable. This was not a big issue, because,
1972 being within the spool directory, they were not world-accessible. I have
1973 created a function called modefopen, which takes an additional mode
1974 argument. It sets umask(777), creates the file, chmods it to the required
1975 mode, then resets the umask. All the relevant calls to fopen() in the
1976 content scanning code have been changed to use this function.
1978 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1979 to 24 hours. This avoids potential overflow problems when processing G
1980 and H retry rules. I suspect nobody ever tinkers with this value.
1982 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1984 PH/45 When the plaintext authenticator is running as a client, the server's
1985 challenges are checked to ensure they are valid base64 strings. By
1986 default, the authentication attempt is cancelled if an invalid string is
1987 received. Setting client_ignore_invalid_base64 true ignores these errors.
1988 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1989 they are received. Thus, the responses can be made to depend on the
1990 challenges. If an invalid string is ignored, an empty string is placed in
1993 PH/46 Messages that are created by the autoreply transport now contains a
1994 References: header, in accordance with RFCs 2822 and 3834.
1996 PH/47 Added authenticated_sender_force to the smtp transport.
1998 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2000 PH/49 Installed latest patch from the Sieve maintainer.
2002 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2003 was also set, the appendfile transport was unnecessarily scanning a
2004 directory of message files (e.g. for maildir delivery) to find the count
2005 of files (along with the size), even though it did not need this
2006 information. It now does the scan only if it needs to find either the
2007 size of the count of files.
2009 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2011 PH/52 Two bugs concerned with error handling when the smtp transport is
2014 (i) Exim was not creating retry information for temporary errors given
2015 for individual recipients after the DATA command when the smtp transport
2016 was used in LMTP mode. This meant that they could be retried too
2017 frequently, and not timed out correctly.
2019 (ii) Exim was setting the flag that allows error details to be returned
2020 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2021 recipients that were returned after the DATA command.
2023 PH/53 This is related to PH/52, but is more general: for any failing address,
2024 when detailed error information was permitted to be returned to the
2025 sender, but the error was temporary, then after the final timeout, only
2026 "retry timeout exceeded" was returned. Now it returns the full error as
2027 well as "retry timeout exceeded".
2029 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2030 do this, and (what is worse) MTAs that accept it.
2032 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2033 will now be deprecated.
2035 PH/56 New os.c-cygwin from the Cygwin maintainer.
2037 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2038 formats (previously only available in exim formats via -bpr, -bpru,
2039 and -bpra. Now also available in native and exiqgrep formats)
2041 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2042 with very large, slow to parse queues
2044 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2046 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2048 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2049 responses to authentication challenges, though it was showing the
2050 challenges; (ii) I've removed the CR characters from the debug output for
2053 PH/58 Allow for the insertion of a newline as well as a space when a string
2054 is turned into more than one encoded-word during RFC 2047 encoding. The
2055 Sieve code now uses this.
2057 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2058 data_4xx, lost_connection, tls_required.
2060 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2061 message was being sent as an SMTP response.
2063 PH/61 Add -l and -k options to exicyclog.
2065 PH/62 When verifying, if an address was redirected to one new address, so that
2066 verification continued, and the new address failed or deferred after
2067 having set something in $address_data, the value of $address_data was not
2068 passed back to the ACL. This was different to the case when no
2069 redirection occurred. The value is now passed back in both cases.
2071 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2072 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2073 use login_cap.h, so on its own it isn't the distinguishing feature. The
2074 new name refers directly to the setclassresources() function.
2076 PH/65 Added configuration files for NetBSD3.
2078 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2080 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2081 is preferred over IPv4.
2083 PH/68 The bounce_return_message and bounce_return_body options were not being
2084 honoured for bounces generated during the reception of non-SMTP messages.
2085 In particular, this applied to messages rejected by the ACL. This bug has
2086 been fixed. However, if bounce_return_message is true and bounce_return_
2087 body is false, the headers that are returned for a non-SMTP message
2088 include only those that have been read before the error was detected.
2089 (In the case of an ACL rejection, they have all been read.)
2091 PH/69 The HTML version of the specification is now built in a directory called
2092 spec_html instead of spec.html, because the latter looks like a path with
2093 a MIME-type, and this confuses some software.
2095 PH/70 Catch two compiler warnings in sieve.c.
2097 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2098 function verify_get_ident() calls ip_connect() to connect a socket, but
2099 if the "connect()" function timed out, ip_connect() used to close the
2100 socket. However, verify_get_ident() also closes the socket later, and in
2101 between Exim writes to the log, which may get opened at this point. When
2102 the socket was closed in ip_connect(), the log could get the same file
2103 descriptor number as the socket. This naturally causes chaos. The fix is
2104 not to close the socket in ip_connect(); the socket should be closed by
2105 the function that creates it. There was only one place in the code where
2106 this was missing, in the iplookup router, which I don't think anybody now
2107 uses, but I've fixed it anyway.
2109 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2110 well as to direct DNS lookups. Otherwise the handling of names in host
2111 lists is inconsistent and therefore confusing.
2117 PH/01 Two changes to the default runtime configuration:
2119 (1) Move the checks for relay_from_hosts and authenticated clients from
2120 after to before the (commented out) DNS black list checks.
2122 (2) Add control=submission to the relay_from_hosts and authenticated
2123 clients checks, on the grounds that messages accepted by these
2124 statements are most likely to be submissions.
2126 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2128 (1) Generate an error if the third argument for the ${prvs expansion is
2131 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2134 (3) Reset the variables that are obtained from the first argument of
2135 ${prvscheck and used in the second argument before leaving the code,
2136 because their memory is reclaimed, so using them afterwards may do
2139 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2140 one (it's much easier than Tom thought :-).
2142 (5) Because of (4), we can now allow for the use of $prvscheck_result
2143 inside the third argument.
2145 PH/03 For some reason, the default setting of PATH when running a command from
2146 a pipe transport was just "/usr/bin". I have changed it to
2149 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2150 anything to be listed in the output from -bV.
2152 PH/05 When a filter generated an autoreply, the entire To: header line was
2153 quoted in the delivery log line, like this:
2155 => >A.N.Other <ano@some.domain> <original@ddress> ...
2157 This has been changed so that it extracts the operative address. There
2158 may be more than one such address. If so, they are comma-separated, like
2161 => >ano@some.domain,ona@other.domain <original@ddress> ...
2163 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2164 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2165 not being looked up in the rDNS to get a host name, Exim was showing the
2166 IP address twice in Received: lines, even though the IP addresses were
2167 identical. For example:
2169 Received: from [1.2.3.4] (helo=[1.2.3.4])
2171 However, if the real host name was known, it was omitting the HELO data
2172 if it matched the actual IP address. This has been tidied up so that it
2173 doesn't show the same IP address twice.
2175 PH/07 When both +timestamp and +memory debugging was on, the value given by
2176 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2177 called by the debug printing, thereby overwriting the timestamp buffer.
2178 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2180 PH/08 When the original message was included in an autoreply transport, it
2181 always said "this is a copy of the message, including all the headers",
2182 even if body_only or headers_only was set. It now gives an appropriate
2185 PH/09 Applied a patch from the Sieve maintainer which:
2187 o fixes some comments
2188 o adds the (disabled) notify extension core
2189 o adds some debug output for the result of if/elsif tests
2190 o points to the current vacation draft in the documentation
2191 and documents the missing references header update
2195 o fixes a bug in processing the envelope test (when testing
2196 multiple envelope elements, the last element determinted the
2199 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2200 Electronic Mail") by including:
2202 Auto-submitted: auto-generated
2204 in the messages that it generates (bounce messages and others, such as
2205 warnings). In the case of bounce messages for non-SMTP mesages, there was
2206 also a typo: it was using "Auto_submitted" (underscore instead of
2207 hyphen). Since every message generated by Exim is necessarily in response
2208 to another message, thes have all been changed to:
2210 Auto-Submitted: auto-replied
2212 in accordance with these statements in the RFC:
2214 The auto-replied keyword:
2216 - SHOULD be used on messages sent in direct response to another
2217 message by an automatic process,
2219 - MUST NOT be used on manually-generated messages,
2221 - MAY be used on Delivery Status Notifications (DSNs) and Message
2222 Disposition Notifications (MDNs),
2224 - MUST NOT be used on messages generated by automatic or periodic
2225 processes, except for messages which are automatic responses to
2228 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2229 to the default Received: header definition.
2231 PH/12 Added log selector acl_warn_skipped (default on).
2233 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2234 variables because (a) they are in the wrong storage pool and (b) even if
2235 they were copied, it wouldn't work properly because of the caching.
2237 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2238 checking when decoding. Apparently there are clients that generate
2239 overlong encoded strings. Why am I not surprised?
2241 PH/15 If the first argument of "${if match_address" was not empty, but did not
2242 contain an "@" character, Exim crashed. Now it writes a panic log message
2243 and treats the condition as false.
2245 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2247 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2248 extension "envelope-auth". The code is finished and in agreement with
2249 other implementations, but there is no documentation so far and in fact,
2250 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2251 not changing the active code.
2253 Print executed "if" and "elsif" statements when debugging is used. This
2254 helps a great deal to understand what a filter does.
2256 Document more things not specified clearly in RFC3028. I had all this
2257 sorted out, when out of a sudden new issues came to my mind. Oops."
2259 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2262 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2263 canonical form (as documented). However, after a host name lookup from
2264 the IP address, check_host() was doing a simple string comparison with
2265 addresses acquired from the DNS when checking that the found name did
2266 have the original IP as one of its addresses. Since any found IPv6
2267 addresses are likely to be in abbreviated form, the comparison could
2268 fail. Luckily, there already exists a function for doing the comparison
2269 by converting both addresses to binary, so now that is used instead of
2270 the text comparison.
2272 PH/20 There was another similar case to PH/19, when a complete host name was
2273 given in a host list; looking up its IP address could give an abbreviated
2274 form, whereas the current host's name might or might not be abbreviated.
2275 The same fix has been applied.
2281 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2282 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2285 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2286 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2288 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2290 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2291 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2292 Also, for "Auto-Submitted", treat anything other than "no" as
2293 non-personal, in accordance with RFC 3834. (Previously it treated
2294 anything starting "auto-" as non-personal.)
2296 TF/01 The control=submission/name=... option had a problem with syntax
2297 errors if the name included a slash character. The /name= option
2298 now slurps the rest of the string, so it can include any characters
2299 but it must come last in the list of options (after /sender_retain
2302 PH/05 Some modifications to the interface to the fake nameserver for the new
2310 TK/01 Added the "success_on_redirect" address verification option. See
2311 NewStuff for rationale and an example.
2313 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2315 PH/02 Patch to exigrep to allow it to work on syslog lines.
2317 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2318 fread() to skip over the body file's header line, because in Cygwin the
2319 header line is locked and is inaccessible.
2321 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2322 co-exist for some time) to make it clear that it is the Exim ID that is
2323 referenced, not the Message-ID: header line.
2325 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2326 string_format() function, because snprintf() does not exist on all
2329 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2330 ${stat: expansion item.
2332 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2333 protocol synchronization error", to keep the pedants happy.
2335 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2336 well as for IRIX systems, when gcc is being used. See the host.c source
2339 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2341 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2344 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2345 transport and to the smtp transport in LMTP mode.
2347 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2349 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2350 run a filter in a subprocess. This could lead to confusion in subsequent
2351 lookups in the parent process. There should also be a search_tidyup() at
2352 the end of the subprocess.
2354 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2355 only if the host matched helo_try_verify_hosts, which caused the
2356 verification to occur when the EHLO/HELO command was issued. The ACL just
2357 tested the remembered result. Now, if a previous verification attempt has
2358 not happened, "verify = helo" does it there and then.
2360 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2362 TK/03 Fix log output including CR from clamd.
2364 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2365 exist provoked a memory error which could cause a segfault.
2367 PH/15 Installed PCRE 6.2
2369 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2371 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2372 of the problem. Specifically, suggested +O2 rather than +O1 for the
2375 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2377 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2378 record, the port was not correctly logged when the outgoing_port log
2379 selector was set (it logged the transort's default port).
2381 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2382 fallback_hosts, and "hosts" in the smtp transport.
2384 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2385 host errors such as "Connection refused".
2387 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2388 authentication with radiusclient 0.4.9:
2390 - Error returned from rc_read_config was caught wrongly
2391 - Username/password not passed on to radius server due to wrong length.
2393 The presumption is that some radiusclient API changes for 4.51/PH/17
2394 were not taken care of correctly. The code is still untested by me (my
2395 Linux distribution still has 0.3.2 of radiusclient), but it was
2396 contributed by a Radius user.
2398 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2399 expanding the "port" option of the smtp transport.
2401 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2402 while reading a MIME header. Thanks to Tom Hughes for a patch.
2404 PH/24 Include config.h inside local_scan.h so that configuration settings are
2407 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2408 that in an ACL for RCPT (for example), you can examine exactly what was
2411 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2412 commands, but it was not correctly comparing the address with the actual
2413 client host address. Thus, it would show the EHLO address in Received:
2414 header lines when this was not necessary.
2416 PH/27 Added the % operator to ${eval:}.
2418 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2419 it should be ignoring failures (because with -C, for example, it has lost
2420 privilege). It wasn't ignoring creation failures other than "already
2423 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2426 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2427 because an input line was too long, either on its own, or by virtue of
2428 too many continuations, the temporary file was not being removed, and the
2429 return code was incorrect.
2431 PH/31 Missing "BOOL" in function definition in filtertest.c.
2433 PH/32 Applied Sieve patches from the maintainer.
2435 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2437 PH/33 Added "verify = not_blind".
2439 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2440 Local/Makefile (with some defaults set). These are used in built scripts
2441 such as exicyclog, but they have never been used in the exim_install
2442 script (though there are many overriding facilities there). I have
2443 arranged that the exim_install script now takes note of these two
2446 PH/35 Installed configuration files for Dragonfly.
2448 PH/36 When a locally submitted message by a trusted user did not contain a
2449 From: header, and the sender address was obtained from -f or from an SMTP
2450 MAIL command, and the trusted user did not use -F to supply a sender
2451 name, $originator_name was incorrectly used when constructing a From:
2452 header. Furthermore, $originator_name was used for submission mode
2453 messages from external hosts without From: headers in a similar way,
2454 which is clearly wrong.
2456 PH/37 Added control=suppress_local_fixups.
2458 PH/38 When log_selector = +received_sender was set, and the addition of the
2459 sender made the log line's construction buffer exactly full, or one byte
2460 less than full, an overflow happened when the terminating "\n" was
2463 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2464 when the result of a list match is failure because a DNS lookup failed.
2466 PH/40 RM_COMMAND is now used in the building process.
2468 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2469 the "build-* directories that it finds.
2471 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2472 address in a domain literal was a prefix of an interface address.
2474 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2475 when verifying a sender address, unless rewrite_headers is false.
2477 PH/44 Wrote a long comment about why errors_to addresses are verified as
2478 recipients, not senders.
2480 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2481 the ratelimit ACL was added.
2483 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2485 PH/46 Added extra information about PostgreSQL errors to the error string.
2487 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2488 avoiding the need to install special zones in a real server. This is
2489 backwards compatible; if it can't find the fake resolver, it drops back.
2490 Thus, both old and new test suites can be run.
2492 TF/02 Added util/ratelimit.pl
2494 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2495 clock is set back in time.
2497 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2498 Candler <B.Candler@pobox.com>.
2500 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2501 OK for addresses that are the result of redirections.
2503 PH/48 A number of further additions for the benefit of the new test suite,
2504 including a fake gethostbyname() that interfaces to the fake DNS resolver
2507 TF/06 The fix for widen_domains has also been applied to qualify_single and
2508 search_parents which are the other dnslookup options that can cause
2511 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2514 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2516 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2517 service" if it encountered an MX record with an empty target hostname.
2518 The message is now "an MX or SRV record indicated no SMTP service".
2520 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2521 if the DNS of the sending site is misconfigured. This is quite a
2522 common situation. This change restores the behaviour of treating a
2523 helo verification defer as a failure.
2525 PH/51 If self=fail was set on a router, the bounce message did not include the
2526 actual error message.
2532 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2534 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2535 command itself ended in error, the underlying message about the transport
2536 filter timeout was being overwritten with the pipe command error. Now the
2537 underlying error message should be appended to the second error message.
2539 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2541 PH/02 Reduce the amount of output that "make" produces by default. Full output
2542 can still be requested.
2544 PH/03 The warning log line about a condition test deferring for a "warn" verb
2545 was being output only once per connection, rather than after each
2546 occurrence (because it was using the same function as for successful
2547 "warn" verbs). This seems wrong, so I have changed it.
2549 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2550 it should not have, which might have caused a crash in the right
2551 circumstances, but probably never did.
2553 PH/04 Installed a modified version of Tony Finch's patch to make submission
2554 mode fix the return path as well as the Sender: header line, and to
2555 add a /name= option so that you can make the user's friendly name appear
2558 TF/03 Added the control = fakedefer ACL modifier.
2560 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2561 Mark Lowes for thorough testing.
2563 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2565 TK/03 Merged latest SRS patch from Miles Wilton.
2567 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2568 with the definition in sysexits.h (which is #included earlier).
2569 Fortunately, Exim does not actually use EX_OK. The code used to try to
2570 preserve the sysexits.h value, by assumimg that macro definitions were
2571 scanned for macro replacements. I have been disabused of this notion,
2572 so now the code just undefines EX_OK before #including unistd.h.
2574 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2575 in the smtp transport. When a block could not be written in a single
2576 write() function, the timeout was being re-applied to each part-write.
2577 This seems wrong - if the receiver was accepting one byte at a time it
2578 would take for ever. The timeout is now adjusted when this happens. It
2579 doesn't have to be particularly precise.
2581 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2582 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2584 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2585 without a domain if the check to <postmaster@domain> fails.
2587 SC/01 Eximstats: added -xls and the ability to specify output files
2588 (patch written by Frank Heydlauf).
2590 SC/02 Eximstats: use FileHandles for outputing results.
2592 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2594 SC/04 Eximstats: fixed display of large numbers with -nvr option
2596 SC/05 Eximstats: fixed merging of reports with empty tables.
2598 SC/06 Eximstats: added the -include_original_destination flag
2600 SC/07 Eximstats: removed tabs and trailing whitespace.
2602 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2604 TK/06 MBOX spool code: Add real "From " MBOX separator line
2605 so the .eml file is really in mbox format (even though
2606 most programs do not really care). Patch from Alex Miller.
2608 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2609 The latter is generated from $received_to and is only set if the
2610 message has one envelope recipient. SA can use these headers,
2611 obviously out-of-the-box. Patch from Alex Miller.
2613 PH/08 The ${def test on a variable was returning false if the variable's
2614 value was "0", contrary to what the specification has always said!
2615 The result should be true unless the variable is empty.
2617 PH/09 The syntax error of a character other than { following "${if
2618 def:variable_name" (after optional whitespace) was not being diagnosed.
2619 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2620 accidental colon was present, for example, could give incorrect results.
2622 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2623 result is used (not including appendfile, where other changes are about
2626 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2627 This involved changing a lot of size variables from int to off_t. It
2628 should work with maildirs and everything.
2630 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2631 spamd dying while we are connected to it.
2633 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2636 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2637 function for BDB 4.3.
2639 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2641 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2642 the sources for PCRE have been re-arranged and more files are now
2645 PH/15 The code I had for printing potentially long long variables in PH/11
2646 above was not the best (it lost precision). The length of off_t variables
2647 is now inspected at build time, and an appropriate printing format (%ld
2648 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2649 to be "long long int" or "long int". This is needed for the internal
2650 formatting function string_vformat().
2652 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2653 the configuration file to be ":syslog", then the script "guesses" where
2654 the logs files are, rather than using the compiled in default. In our
2655 case the guess is not the same as the compiled default, so the script
2656 suddenly stopped working when I started to use syslog. The patch checks
2657 to see if log_file_path is "". If so, it attempts to read it from exim
2658 with no configuration file to get the compiled in version, before it
2659 falls back to the previous guessing code."
2661 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2662 implementing BATV in an Exim configuration. See NewStuff for the gory
2665 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2666 Makefile that are specific to HP-UX.
2668 PH/18 If the "use_postmaster" option was set for a recipient callout together
2669 with the "random" option, the postmaster address was used as the MAIL
2670 FROM address for the random test, but not for the subsequent recipient
2671 test. It is now used for both.
2673 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2674 patch removes a few documentation additions to RFC 3028, because the
2675 latest draft now contains them. It adds the new en;ascii-case comparator
2676 and a new error check for 8bit text in MIME parts. Comparator and
2677 require names are now matched exactly. I enabled the subaddress
2678 extension, but it is not well tested yet (read: it works for me)."
2680 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2681 rework some of the code of TK/09 above to avoid the hardwired use of
2682 "%lld" and "long long". Replaced the call to snprintf() with a call to
2685 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2686 records point to non-existent hosts", "retry timeout exceeded", and
2687 "retry time not reached for any host after a long failure period".
2689 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2690 experimental DomainKeys support:
2692 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2693 (2) On an error such as an illegally used "control", the wrong name for
2694 the control was given.
2696 These problems did NOT occur unless DomainKeys support was compiled.
2698 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2700 PH/24 Added ${if match_ip condition.
2702 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2703 databases so that it will be absolutely obvious if a crash occurs in the
2704 DB library. This is a regular occurrence (often caused by mis-matched
2707 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2708 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2709 picked up on a user's system that detects such things. There doesn't seem
2710 to be a gcc warning option for this - only an attribute that has to be
2711 put on the function's prototype. It seems that in Fedora Core 4 they have
2712 set this on a number of new functions. No doubt there will be more in due
2715 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2716 specify a transport. However, if an address that was verified by such a
2717 router was the subject of a callout, Exim crashed because it tried to
2718 read the rcpt_include_affixes from the non-existent transport. Now it
2719 just assumes that the setting of that option is false. This bug was
2720 introduced by 4.51/PH/31.
2722 PH/28 Changed -d+all to exclude +memory, because that information is very
2723 rarely of interest, but it makes the output a lot bigger. People tend to
2724 do -d+all out of habit.
2726 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2727 code in os-type was giving problems when libc.so lives in lib64, like on
2730 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2731 aren't the modern standard, and it seems that some systems' include files
2732 don't always have them. Exim was already checking for some of the newer
2733 ones like T_AAAA, and defining it itself. I've added checks for all the
2734 record types that Exim uses.
2736 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2737 not automatically generating a new one, as it is supposed to. This
2738 prevented TLS from working. If the file did exist, but contained invalid
2739 data, a new version was generated, as expected. It was only the case of a
2740 non-existent file that was broken.
2742 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2743 with a change in libdomainkeys > 0.64.
2745 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2746 from DNS. If the selector record carries the flag, it now has
2747 precedence over the domain-wide flag.
2749 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2751 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2752 the use of a port name that isn't defined in /etc/services) occurred, the
2753 message was deferred as in a normal delivery, and thus remained on the
2754 spool, instead of being failed because of the mua_wrapper setting. This
2755 is now fixed, and I tidied up some of the mua_wrapper messages at the
2758 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2759 the messages in a hash of arrays rather than using individual hashes.
2760 This is a bit cleaner and results in dramatic memory savings, albeit
2761 at a slight CPU cost.
2763 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2764 as requested by Marc Sherman.
2766 SC/10 Eximstats: added histograms for user specified patterns as requested
2769 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2771 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2772 fopen() in the content-scanning modules that did not already have it.
2778 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2779 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2781 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2783 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2785 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2786 to test Sieve filters that use "vacation".
2788 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2789 that changes the way the GnuTLS parameters are stored in the cache file.
2790 The new format can be generated externally. For backward compatibility,
2791 if the data in the cache doesn't make sense, Exim assumes it has read an
2792 old-format file, and it generates new data and writes a new file. This
2793 means that you can't go back to an older release without removing the
2796 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2797 work if there are any delivery delays because "one_time" forces the
2798 parent to be marked "delivered", so its unseen clone is never tried
2799 again. For this reason, Exim now forbids the simultaneous setting of
2802 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2803 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2804 entry if you want to know the details. The fix, however, neglected to
2805 consider the case when local delivery batching is involved. The test for
2806 "previously delivered" was not happening when checking to see if an
2807 address could be batched with a previous (undelivered) one; under
2808 certain circumstances this could lead to multiple deliveries to the same
2811 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2812 in its include files, and this causes problems building Exim.
2814 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2815 header_syntax) but Exim was just ignoring anything given after a slash.
2816 In particular, this caused confusion with an attempt to use "verify =
2817 reverse_host_lookup/defer_ok". An error is now given when options are
2818 supplied for verify items that do not have them. (Maybe reverse_host_
2819 lookup should have a defer_ok option, but that's a different point.)
2821 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2822 defined by RFC 821) to 2048, because there were problems with some AUTH
2823 commands, and RFC 1869 says the size should be increased for extended
2824 SMTP commands that take arguments.
2826 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2829 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2830 "unknown" error; now it says that the functionality isn't in the binary.
2832 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2833 an address' error message when a string expansion fails (syntax or
2834 whatever). Otherwise the password may appear in the log. Following change
2835 PH/42 below, there is no longer a chance of it appearing in a bounce
2838 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2840 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2841 of its addresses was ever tried. (Bugzilla bug #2.)
2843 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2844 the result incorrectly in the debug output. (It correctly added a newline
2845 to what was transported.)
2847 TF/01 Added $received_time.
2849 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2850 commented out examples of how to interface to a virus scanner and to
2851 SpamAssassin. Also added commented examples of av_scanner and
2852 spamd_address settings.
2854 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2855 and controls are allowed in which ACLs. There were a couple of minor
2856 errors. Some of the entries in the conditions table (which is a table of
2857 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2858 negation of where the condition IS allowed.
2860 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2862 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2863 header file does not have a version number, so I've had to invent a new
2864 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2865 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2866 radiusclient), but it was contributed by a Radius user.
2868 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2869 files or directories, for OpenSSL.
2871 PH/19 When an Exim process that is running as root has to create an Exim log
2872 file, it does so in a subprocess that runs as exim:exim so as to get the
2873 ownership right at creation (otherwise, other Exim processes might see
2874 the file with the wrong ownership). There was no test for failure of this
2875 fork() call, which would lead to the process getting stuck as it waited
2876 for a non-existent subprocess. Forks do occasionally fail when resources
2877 run out. I reviewed all the other calls to fork(); they all seem to check
2880 PH/20 When checking for unexpected SMTP input at connect time (before writing
2881 the banner), Exim was not dealing correctly with a non-positive return
2882 from the read() function. If the client had disconnected by this time,
2883 the result was a log entry for a synchronization error with an empty
2884 string after "input=" when read() returned zero. If read() returned -1
2885 (an event I could not check), uninitialized data bytes were printed.
2886 There were reports of junk text (parts of files, etc) appearing after
2889 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2891 PH/22 Added support for macro redefinition, and (re)definition in between
2892 driver and ACL definitions.
2894 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2895 forgetting to use the resulting value; it was using the unexpanded value.
2897 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2898 hadn't been configured. The fix is from Juergen Kreileder, who
2899 understands it better than I do:
2901 "Here's what I see happening with three configured cyrus_sasl
2902 authenticators configured (plain, login, cram-md5):
2904 On startup auth_cyrus_sasl_init() gets called for each of these.
2905 This means three calls to sasl_listmech() without a specified mech_list.
2906 => SASL tests which mechs of all available mechs actually work
2907 => three warnings about OTP not working
2908 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2910 With the patch, sasl_listmech() also gets called three times. But now
2911 SASL's mech_list option is set to the server_mech specified in the the
2912 authenticator. Or in other words, the answer from sasl_listmech()
2913 gets limited to just the mech you're testing for (which is different
2915 => the return list contains just 'plain' or 'login', 'cram-md5' or
2916 nothing depending on the value of ob->server_mech.
2918 I've just tested the patch: Authentication still works fine,
2919 unavailable mechs specified in the exim configuration are still
2920 caught, and the auth.log warnings about OTP are gone."
2922 PH/25 When debugging is enabled, the contents of the command line are added
2923 to the debugging output, even when log_selector=+arguments is not
2926 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2927 answer is "GNU", and only if the return is "GNU/something" is the answer
2930 PH/27 $acl_verify_message is now set immediately after the failure of a
2931 verification in an ACL, and so is available in subsequent modifiers. In
2932 particular, the message can be preserved by coding like this:
2934 warn !verify = sender
2935 set acl_m0 = $acl_verify_message
2937 Previously, $acl_verify_message was set only while expanding "message"
2938 and "log_message" when a very denied access.
2940 PH/28 Modified OS/os.c-Linux with
2942 -#ifndef OS_LOAD_AVERAGE
2943 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2945 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2946 nomenclature these days.)
2948 PH/29 Installed patch from the Sieve maintainer that adds the options
2949 sieve_useraddress and sieve_subaddress to the redirect router.
2951 PH/30 In these circumstances:
2952 . Two addresses routed to the same list of hosts;
2953 . First host does not offer TLS;
2954 . First host accepts first address;
2955 . First host gives temporary error to second address;
2956 . Second host offers TLS and a TLS session is established;
2957 . Second host accepts second address.
2958 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2959 and peerdn, if requested) that were in fact used only for the second
2962 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2963 attention to any local part prefix or suffix that was matched by the
2964 router that accepted the address. It now behaves in the same way as it
2965 does for delivery: the affixes are removed from the local part unless
2966 rcpt_include_affixes is set on the transport.
2968 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2969 timeout during the DATA phase of an incoming message.
2971 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2972 applied a patch sanctioned by the Sieve maintainer.
2974 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2975 the uid or gid is negative. A case of a negative gid caused this to be
2976 noticed. The fix allows for either to be negative.
2978 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2979 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2982 PH/36 The change PH/12 above was broken. Fixed it.
2984 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2985 the grounds that routing the same address twice would always produce the
2986 same answer. This might have been true once, but it is certainly no
2987 longer true now. Routing a child address may depend on the previous
2988 routing that produced that child. Some complicated redirection strategies
2989 went wrong when messages had multiple recipients, and made Exim's
2990 behaviour dependent on the order in which the addresses were given.
2992 I have moved the duplicate checking until after the routing is complete.
2993 Exim scans the addresses that are assigned to local and remote
2994 transports, and removes any duplicates. This means that more work will be
2995 done, as duplicates will always all be routed, but duplicates are
2996 presumably rare, so I don't expect this is of any significance.
2998 For deliveries to pipes, files, and autoreplies, the duplicate checking
2999 still happens during the routing process, since they are not going to be
3002 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3003 It corrects a timeout issue with spamd. This is Ian's comment: "The
3004 background is that sometimes spamd either never reads data from a
3005 connection it has accepted, or it never writes response data. The exiscan
3006 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3007 blindly assumes that writes won't block so it may never time out."
3009 PH/39 Allow G after quota size as well as K and M.
3011 PH/40 The value set for $authenticated_id in an authenticator may not contain
3012 binary zeroes or newlines because the value is written to log lines and
3013 to spool files. There was no check on this. Now the value is run through
3014 the string_printing() function so that such characters are converted to
3015 printable escape sequences.
3017 PH/41 $message_linecount is a new variable that contains the total number of
3018 lines in the message. Compare $body_linecount, which is the count for the
3021 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3022 bounce and delay warning messages, except in certain special cases, which
3025 (a) An SMTP error message from a remote host;
3026 (b) A message specified in a :fail: redirection;
3027 (c) A message specified in a "fail" command in a system filter;
3028 (d) A message specified in a FAIL return from the queryprogram router;
3029 (e) A message specified by the cannot_route_message router option.
3031 In these cases only, Exim does include the error details in bounce and
3032 warning messages. There are also a few cases where bland messages such
3033 as "unrouteable address" or "local delivery error" are given.
3035 PH/43 $value is now also set for the "else" part of a ${run expansion.
3037 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3038 being worked on, but at least Exim now implements the latest version to
3041 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3042 process to complete was treated as a delivery failure, a timeout while
3043 writing the message to the pipe was logged, but erroneously treated as a
3044 successful delivery. Such timeouts include transport filter timeouts. For
3045 consistency with the overall process timeout, these timeouts are now
3046 treated as errors, giving rise to delivery failures by default. However,
3047 there is now a new Boolean option for the pipe transport called
3048 timeout_defer, which, if set TRUE, converts the failures into defers for
3049 both kinds of timeout. A transport filter timeout is now identified in
3052 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3053 systems where "make" and "gmake" are different, calling "gmake" at top
3054 level broke things. I've arranged for the value of $(MAKE) to be passed
3055 from the Makefile to this script so that it can call the same version of
3059 A note about Exim versions 4.44 and 4.50
3060 ----------------------------------------
3062 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3063 changes of various kinds. As a consequence, a big documentation update was
3064 needed. This delayed the release for rather longer than seemed good, especially
3065 in the light of a couple of (minor) security issues. Therefore, the changes
3066 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3067 release. So 4.44 and 4.50 are in effect two different branches that both start
3070 I have left the 4.50 change log unchanged; it contains all the changes since
3071 4.43. The change log for 4.44 is below; many of its items are identical to
3072 those for 4.50. This seems to be the most sensible way to preserve the
3073 historical information.
3079 1. Minor wording change to the doc/README.SIEVE file.
3081 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3082 computation of the current number of files was incorrect.
3084 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3085 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3088 4. Give more explanation in the error message when the command for a transport
3089 filter fails to execute.
3091 5. There are several places where Exim runs a non-Exim command in a
3092 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3093 was being done only for the command run by the queryprogram router. It is
3094 now done for all such subprocesses. The other cases are: ${run, transport
3095 filters, and the commands run by the lmtp and pipe transports.
3097 6. Added CONFIGURE_GROUP build-time option.
3099 7. Some older OS have a limit of 256 on the maximum number of file
3100 descriptors. Exim was using setrlimit() to set 1000 as a large value
3101 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3102 systems. I've change it so that if it can't get 1000, it tries for 256.
3104 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3105 was an oversight, and furthermore, ever since the addition of extra
3106 controls (e.g. 4.43/32), the checks on when to allow different forms of
3107 "control" were broken. There should now be diagnostics for all cases when a
3108 control that does not make sense is encountered.
3110 9. Added the /retain_sender option to "control=submission".
3112 10. $recipients is now available in the predata ACL (oversight).
3114 11. Tidy the search cache before the fork to do a delivery from a message
3115 received from the command line. Otherwise the child will trigger a lookup
3116 failure and thereby defer the delivery if it tries to use (for example) a
3117 cached ldap connection that the parent has called unbind on.
3119 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3120 of $address_data from the recipient verification was clobbered by the
3121 sender verification.
3123 13. The value of address_data from a sender verification is now available in
3124 $sender_address_data in subsequent conditions in the ACL statement.
3126 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3128 15. Added a new option "connect=<time>" to callout options, to set a different
3131 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3132 was its contents. (It was OK if the option was not defined at all.)
3134 17. A "Completed" log line is now written for messages that are removed from
3135 the spool by the -Mrm option.
3137 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3138 information about exactly what failed.
3140 19. Added -dd to debug only the daemon process.
3142 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3143 handles timeouts, both on the server side and network timeouts. Renamed the
3144 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3146 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3147 It is now set to "smtps".
3149 22. $host_address is now set to the target address during the checking of
3150 ignore_target_hosts.
3152 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3153 being passed; this would have caused $sender_host_name to have been used if
3154 matching the list had actually called for a host name (not very likely,
3155 since this list is usually IP addresses). A host name is now passed as
3158 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3159 code that specifies a non-restarting handler (typically sigaction() in
3160 modern systems) in an attempt to fix a rare and obscure crash bug.
3162 25. Narrowed the window for a race in the daemon that could cause it to ignore
3163 SIGCHLD signals. This is not a major problem, because they are used only to
3164 wake it up if nothing else does.
3166 26. A malformed maildirsize file could cause Exim to calculate negative values
3167 for the mailbox size or file count. Odd effects could occur as a result.
3168 The maildirsize information is now recalculated if the size or filecount
3171 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3172 support for a long time. Removed HAVE_SYS_VFS_H.
3174 28. Installed the latest version of exipick from John Jetmore.
3176 29. In an address list, if the pattern was not a regular expression, an empty
3177 subject address (from a bounce message) matched only if the pattern was an
3178 empty string. Non-empty patterns were not even tested. This was the wrong
3179 because it is perfectly reasonable to use an empty address as part of a
3180 database query. An empty address is now tested by patterns that are
3181 lookups. However, all the other forms of pattern expect the subject to
3182 contain a local part and a domain, and therefore, for them, an empty
3183 address still always fails if the pattern is not itself empty.
3185 30. Exim went into a mad DNS loop when attempting to do a callout where the
3186 host was specified on an smtp transport, and looking it up yielded more
3187 than one IP address.
3189 31. Re-factored the code for checking spool and log partition space into a
3190 function that finds that data and another that does the check. The former
3191 is then used to implement four new variables: $spool_space, $log_space,
3192 $spool_inodes, and $log_inodes.
3194 32. The RFC2047 encoding function was originally intended for short strings
3195 such as real names; it was not keeping to the 75-character limit for
3196 encoded words that the RFC imposes. It now respects the limit, and
3197 generates multiple encoded words if necessary. To be on the safe side, I
3198 have increased the buffer size for the ${rfc2047: expansion operator from
3201 33. It is now permitted to omit both strings after an "if" condition; if the
3202 condition is true, the result is "true". As before, when the second string
3203 is omitted, a false condition yields an empty string. This makes it less
3204 cumbersome to write custom ACL and router conditions.
3206 34. Failure to deliver a bounce message always caused it to be frozen, even if
3207 there was an errors_to setting on the router. The errors_to setting is now
3210 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3211 canonical form (fully expanded) before being placed in
3212 $sender_host_address.
3214 36. The table in the code that translates DNS record types into text (T_A to
3215 "A" for instance) was missing entries for NS and CNAME. It is just possible
3216 that this could have caused confusion if both these types were looked up
3217 for the same domain, because the text type is used as part of Exim's
3218 per-process caching. But the chance of anyone hitting this buglet seems
3221 37. The dnsdb lookup has been extended in a number of ways.
3223 (1) There is a new type, "zns", which walks up the domain tree until it
3224 finds some nameserver records. It should be used with care.
3226 (2) There is a new type, "mxh", which is like "mx" except that it returns
3227 just the host names, not the priorities.
3229 (3) It is now possible to give a list of domains (or IP addresses) to be
3230 looked up. The behaviour when one of the lookups defers can be
3231 controlled by a keyword.
3233 (4) It is now possible to specify the separator character for use when
3234 multiple records are returned.
3236 38. The dnslists ACL condition has been extended: it is now possible to supply
3237 a list of IP addresses and/or domains to be looked up in a particular DNS
3240 39. Added log_selector=+queue_time_overall.
3242 40. When running the queue in the test harness, wait just a tad after forking a
3243 delivery process, to get repeatability of debugging output.
3245 41. Include certificate and key file names in error message when GnuTLS fails
3246 to set them up, because the GnuTLS error message doesn't include the name
3247 of the failing file when there is a problem reading it.
3249 42. Allow both -bf and -bF in the same test run.
3251 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3253 44. The "Exiscan patch" is now merged into the mainline Exim source.
3255 45. Sometimes the final signoff response after QUIT could fail to get
3256 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3257 < 0 before doing a fflush(). This bug looks as though it goes back to the
3258 introduction of TLS in release 3.20, but "sometimes" must have been rare
3259 because the tests only now provoked it.
3261 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3262 (this can affect the format of dates).
3264 47. exim_tidydb, when checking for the continued existence of a message for
3265 which it has found a message-specific retry record, was not finding
3266 messages that were in split spool directories. Consequently, it was
3267 deleting retry records that should have stayed in existence.
3269 48. Steve fixed some bugs in eximstats.
3271 49. The SPA authentication driver was not abandoning authentication and moving
3272 on to the next authenticator when an expansion was forced to fail,
3273 contradicting the general specification for all authenticators. Instead it
3274 was generating a temporary error. It now behaves as specified.
3276 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3277 (the order specifies the preference for clients). The order is now AES256,
3278 AES128, 3DES, ARCFOUR128.
3280 51. Small patch to Sieve code - explicitly set From: when generating an
3283 52. Exim crashed if a remote delivery caused a very long error message to be
3284 recorded - for instance if somebody sent an entire SpamAssassin report back
3285 as a large number of 550 error lines. This bug was coincidentally fixed by
3286 increasing the size of one of Exim's internal buffers (big_buffer) that
3287 happened as part of the Exiscan merge. However, to be on the safe side, I
3288 have made the code more robust (and fixed the comments that describe what
3291 53. Now that there can be additional text after "Completed" in log lines (if
3292 the queue_time_overall log selector is set), a one-byte patch to exigrep
3293 was needed to allow it to recognize "Completed" as not the last thing in
3296 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3297 patch that reportedly fixes this has been added. I am not expert enough to
3298 create a test for it. This is what the patch creator wrote:
3300 "I found a little strange behaviour of ldap code when working with
3301 Windows 2003 AD Domain, where users was placed in more than one
3302 Organization Units. When I tried to give exim partial DN, the exit code
3303 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3304 But simultaneously result of request was absolutely normal ldap result,
3305 so I produce this patch..."
3307 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3308 REFERENCE, so I have modified the code to exclude the patch when that macro
3311 55. Some experimental protocols are using DNS PTR records for new purposes. The
3312 keys for these records are domain names, not reversed IP addresses. The
3313 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3314 leaves it alone. Component reversal etc. now happens only for IP addresses.
3317 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3319 57. Double the size of the debug message buffer (to 2048) so that more of very
3320 long debug lines gets shown.
3322 58. The exicyclog utility now does better if the number of log files to keep
3323 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3325 59. Two changes related to the smtp_active_hostname option:
3327 (1) $smtp_active_hostname is now available as a variable.
3328 (2) The default for smtp_banner uses $smtp_active_hostname instead
3329 of $primary_hostname.
3331 60. The host_aton() function is supposed to be passed a string that is known
3332 to be a valid IP address. However, in the case of IPv6 addresses, it was
3333 not checking this. This is a hostage to fortune. Exim now panics and dies
3334 if the condition is not met. A case was found where this could be provoked
3335 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3336 components; fortuitously, this particular loophole had already been fixed
3337 by change 4.50/55 above.
3339 If there are any other similar loopholes, the new check in host_aton()
3340 itself should stop them being exploited. The report I received stated that
3341 data on the command line could provoke the exploit when Exim was running as
3342 exim, but did not say which command line option was involved. All I could
3343 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3344 running as the user.
3347 61. There was a buffer overflow vulnerability in the SPA authentication code
3348 (which came originally from the Samba project). I have added a test to the
3349 spa_base64_to_bits() function which I hope fixes it.
3352 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3353 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3355 63. The daemon start-up calls getloadavg() while still root for those OS that
3356 need the first call to be done as root, but it missed one case: when
3357 deliver_queue_load_max is set with deliver_drop_privilege. This is
3358 necessary for the benefit of the queue runner, because there is no re-exec
3359 when deliver_drop_privilege is set.
3361 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3362 This has been fixed.
3364 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3365 was in use, was not putting the data itself into the right store pool;
3366 consequently, it could be overwritten for a subsequent message in the same
3367 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3370 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3372 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3373 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3374 the function were treating the return as a boolean value, which happened to
3375 work because 0=false and not-0=true, but is not correct code.
3377 68. The host_aton() function was not handling scoped IPv6 addresses (those
3378 with, for example, "%eth0" on the end) correctly.
3380 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3381 negated items (that is, ~something) in unsigned ints. Some compilers
3382 apparently mutter when there is no cast.
3384 70. If an address verification called from an ACL failed, and did not produce a
3385 user-specific message (i.e. there was only a "system" message), nothing was
3386 put in $acl_verify_message. In this situation, it now puts the system
3389 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3390 session; change 4.31/43 added the unwanted input to the log line - except
3391 that it did not do this in the start of session case. It now does.
3393 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3394 This is wrong and can cause the other end to generate a synchronization
3395 error if it is another Exim or anything else that does the synchronization
3396 check. A QUIT command is no longer sent after a timeout.
3398 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3399 during host lookups.
3401 74. The defer_ok option of callout verification was not working if it was used
3402 when verifying addresses in header lines, that is, for this case:
3404 verify = header_sender/callout=defer_ok
3406 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3407 those file descriptors could be used for SMTP connections. If anything
3408 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3409 could be sent to the SMTP client, causing chaos. The daemon now opens
3410 stdin, stdout, and stderr to /dev/null when it puts itself into the
3413 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3414 log by default. The user can override this with suitable Perl magic.
3416 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3417 the log message when discard triggers, was not working for the DATA ACL or
3418 for the non-SMTP ACL.
3420 78. Error message wording change in sieve.c.
3422 79. If smtp_accept_max_per_host was set, the number of connections could be
3423 restricted to fewer than expected, because the daemon was trying to set up
3424 a new connection before checking whether the processes handling previous
3425 connections had finished. The check for completed processes is now done
3426 earlier. On busy systems, this bug wouldn't be noticed because something
3427 else would have woken the daemon, and it would have reaped the completed
3430 80. If a message was submitted locally by a user whose login name contained one
3431 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3432 It caused a spool format error. I have fixed the spool reading code. A
3433 related problem was that the "from" clause in the Received: line became
3434 illegal because of the space(s). It is now covered by ${quote_local_part.
3436 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3439 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3441 83. Patch from Sieve maintainer to fix unterminated string problem in
3442 "vacation" handling.
3444 84. Some minor changes to the Linux configuration files to help with other
3445 OS variants using glibc.
3447 85. One more patch for Sieve to update vacation handling to latest spec.
3450 ----------------------------------------------------
3451 See the note above about the 4.44 and 4.50 releases.
3452 ----------------------------------------------------
3458 1. Change 4.43/35 introduced a bug that caused file counts to be
3459 incorrectly computed when quota_filecount was set in an appendfile
3462 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3463 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3466 3. Give more explanation in the error message when the command for a transport
3467 filter fails to execute.
3469 4. There are several places where Exim runs a non-Exim command in a
3470 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3471 was being done only for the command run by the queryprogram router. It is
3472 now done for all such subprocesses. The other cases are: ${run, transport
3473 filters, and the commands run by the lmtp and pipe transports.
3475 5. Some older OS have a limit of 256 on the maximum number of file
3476 descriptors. Exim was using setrlimit() to set 1000 as a large value
3477 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3478 systems. I've change it so that if it can't get 1000, it tries for 256.
3480 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3481 was an oversight, and furthermore, ever since the addition of extra
3482 controls (e.g. 4.43/32), the checks on when to allow different forms of
3483 "control" were broken. There should now be diagnostics for all cases when a
3484 control that does not make sense is encountered.
3486 7. $recipients is now available in the predata ACL (oversight).
3488 8. Tidy the search cache before the fork to do a delivery from a message
3489 received from the command line. Otherwise the child will trigger a lookup
3490 failure and thereby defer the delivery if it tries to use (for example) a
3491 cached ldap connection that the parent has called unbind on.
3493 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3494 of $address_data from the recipient verification was clobbered by the
3495 sender verification.
3497 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3498 was its contents. (It was OK if the option was not defined at all.)
3500 11. A "Completed" log line is now written for messages that are removed from
3501 the spool by the -Mrm option.
3503 12. $host_address is now set to the target address during the checking of
3504 ignore_target_hosts.
3506 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3507 being passed; this would have caused $sender_host_name to have been used if
3508 matching the list had actually called for a host name (not very likely,
3509 since this list is usually IP addresses). A host name is now passed as
3512 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3513 code that specifies a non-restarting handler (typically sigaction() in
3514 modern systems) in an attempt to fix a rare and obscure crash bug.
3516 15. Narrowed the window for a race in the daemon that could cause it to ignore
3517 SIGCHLD signals. This is not a major problem, because they are used only to
3518 wake it up if nothing else does.
3520 16. A malformed maildirsize file could cause Exim to calculate negative values
3521 for the mailbox size or file count. Odd effects could occur as a result.
3522 The maildirsize information is now recalculated if the size or filecount
3525 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3526 support for a long time. Removed HAVE_SYS_VFS_H.
3528 18. Updated exipick to current release from John Jetmore.
3530 19. Allow an empty sender to be matched against a lookup in an address list.
3531 Previously the only cases considered were a regular expression, or an
3534 20. Exim went into a mad DNS lookup loop when doing a callout where the
3535 host was specified on the transport, if the DNS lookup yielded more than
3538 21. The RFC2047 encoding function was originally intended for short strings
3539 such as real names; it was not keeping to the 75-character limit for
3540 encoded words that the RFC imposes. It now respects the limit, and
3541 generates multiple encoded words if necessary. To be on the safe side, I
3542 have increased the buffer size for the ${rfc2047: expansion operator from
3545 22. Failure to deliver a bounce message always caused it to be frozen, even if
3546 there was an errors_to setting on the router. The errors_to setting is now
3549 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3550 canonical form (fully expanded) before being placed in
3551 $sender_host_address.
3553 24. Updated eximstats to version 1.33
3555 25. Include certificate and key file names in error message when GnuTLS fails
3556 to set them up, because the GnuTLS error message doesn't include the name
3557 of the failing file when there is a problem reading it.
3559 26. Expand error message when OpenSSL has problems setting up cert/key files.
3562 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3563 (this can affect the format of dates).
3565 28. exim_tidydb, when checking for the continued existence of a message for
3566 which it has found a message-specific retry record, was not finding
3567 messages that were in split spool directories. Consequently, it was
3568 deleting retry records that should have stayed in existence.
3570 29. eximstats updated to version 1.35
3571 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3572 1.35 - bugfix such that pie charts by volume are generated correctly
3574 30. The SPA authentication driver was not abandoning authentication and moving
3575 on to the next authenticator when an expansion was forced to fail,
3576 contradicting the general specification for all authenticators. Instead it
3577 was generating a temporary error. It now behaves as specified.
3579 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3580 (the order specifies the preference for clients). The order is now AES256,
3581 AES128, 3DES, ARCFOUR128.
3583 31. Small patch to Sieve code - explicitly set From: when generating an
3586 32. Exim crashed if a remote delivery caused a very long error message to be
3587 recorded - for instance if somebody sent an entire SpamAssassin report back
3588 as a large number of 550 error lines. This bug was coincidentally fixed by
3589 increasing the size of one of Exim's internal buffers (big_buffer) that
3590 happened as part of the Exiscan merge. However, to be on the safe side, I
3591 have made the code more robust (and fixed the comments that describe what
3594 33. Some experimental protocols are using DNS PTR records for new purposes. The
3595 keys for these records are domain names, not reversed IP addresses. The
3596 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3597 leaves it alone. Component reversal etc. now happens only for IP addresses.
3600 34. The host_aton() function is supposed to be passed a string that is known
3601 to be a valid IP address. However, in the case of IPv6 addresses, it was
3602 not checking this. This is a hostage to fortune. Exim now panics and dies
3603 if the condition is not met. A case was found where this could be provoked
3604 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3605 components; fortuitously, this particular loophole had already been fixed
3606 by change 4.50/55 or 4.44/33 above.
3608 If there are any other similar loopholes, the new check in host_aton()
3609 itself should stop them being exploited. The report I received stated that
3610 data on the command line could provoke the exploit when Exim was running as
3611 exim, but did not say which command line option was involved. All I could
3612 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3613 running as the user.
3616 35. There was a buffer overflow vulnerability in the SPA authentication code
3617 (which came originally from the Samba project). I have added a test to the
3618 spa_base64_to_bits() function which I hope fixes it.
3621 36. The daemon start-up calls getloadavg() while still root for those OS that
3622 need the first call to be done as root, but it missed one case: when
3623 deliver_queue_load_max is set with deliver_drop_privilege. This is
3624 necessary for the benefit of the queue runner, because there is no re-exec
3625 when deliver_drop_privilege is set.
3627 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3628 was in use, was not putting the data itself into the right store pool;
3629 consequently, it could be overwritten for a subsequent message in the same
3630 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3633 38. Sometimes the final signoff response after QUIT could fail to get
3634 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3635 < 0 before doing a fflush(). This bug looks as though it goes back to the
3636 introduction of TLS in release 3.20, but "sometimes" must have been rare
3637 because the tests only now provoked it.
3643 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3644 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3645 Now it returns an integer. A number of calls were still expecting a T/F
3646 return. Fortuitously, in all cases, the tests worked in OK situations,
3647 which is the norm. However, things would have gone wrong on any write
3648 failures on the smtp file descriptor. This function is used when sending
3649 messages over SMTP and also when doing verify callouts.
3651 2. When Exim is called to do synchronous delivery of a locally submitted
3652 message (the -odf or -odi options), it no longer closes stderr before doing
3655 3. Implemented the mua_wrapper option.
3657 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3659 5. Implemented the functions header_remove(), header_testname(),
3660 header_add_at_position(), and receive_remove_recipient(), and exported them
3663 6. If an ACL "warn" statement specified the addition of headers, Exim already
3664 inserted X-ACL-Warn: at the start if there was no header name. However, it
3665 was not making this test for the second and subsequent header lines if
3666 there were newlines in the string. This meant that an invalid header could
3667 be inserted if Exim was badly configured.
3669 7. Allow an ACL "warn" statement to add header lines at the start or after all
3670 the Received: headers, as well as at the end.
3672 8. Added the rcpt_4xx retry error code.
3674 9. Added postmaster_mailfrom=xxx to callout verification option.
3676 10. Added mailfrom=xxxx to the callout verification option, for verify=
3679 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3680 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3682 12. Inserted some casts to stop certain compilers warning when using pointer
3683 differences as field lengths or precisions in printf-type calls (mostly
3684 affecting debugging statements).
3686 13. Added optional readline() support for -be (dynamically loaded).
3688 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3689 same clock tick as a message's arrival, so that its received time was the
3690 same as the "first fail" time on the retry record, and that message
3691 remained on the queue past the ultimate address timeout, every queue runner
3692 would try a delivery (because it was past the ultimate address timeout) but
3693 after another failure, the ultimate address timeout, which should have then
3694 bounced the address, did not kick in. This was a "< instead of <=" error;
3695 in most cases the first failure would have been in the next clock tick
3696 after the received time, and all would be well.
3698 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3699 being recognized when the domain list was tested by the match_domain
3700 condition in an expansion string.
3702 16. Added the ${str2b64: operator.
3704 17. Exim was always calling setrlimit() to set a large limit for the number of
3705 processes, without checking whether the existing limit was already
3706 adequate. (It did check for the limit on file descriptors.) Furthermore,
3707 errors from getrlimit() and setrlimit() were being ignored. Now they are
3708 logged to the main and panic logs, but Exim does carry on, to try to do its
3709 job under whatever limits there are.
3711 18. Imported PCRE 5.0.
3713 19. Trivial typo in log message " temporarily refused connection" (the leading
3716 20. If the log selector return_path_on_delivery was set and an address was
3717 redirected to /dev/null, the delivery process crashed because it assumed
3718 that a return path would always be set for a "successful" delivery. In this
3719 case, the whole delivery is bypassed as an optimization, and therefore no
3722 21. Internal re-arrangement: the function for sending a challenge and reading
3723 a response while authentication was assuming a zero-terminated challenge
3724 string. It's now changed to take a pointer and a length, to allow for
3725 binary data in such strings.
3727 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3729 23. Exim was not respecting finduser_retries when seeking the login of the
3730 uid under which it was called; it was always trying 10 times. (The default
3731 setting of finduser_retries is zero.) Also, it was sleeping after the final
3732 failure, which is pointless.
3734 24. Implemented tls_on_connect_ports.
3736 25. Implemented acl_smtp_predata.
3738 26. If the domain in control=submission is set empty, Exim assumes that the
3739 authenticated id is a complete email address when it generates From: or
3740 Sender: header lines.
3742 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3743 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3744 chown and chgrp in /bin and hostname in /usr/bin.
3746 28. Exim was keeping the "process log" file open after each use, just as it
3747 does for the main log. This opens the possibility of it remaining open for
3748 long periods when the USR1 signal hits a daemon. Occasional processlog
3749 errors were reported, that could have been caused by this. Anyway, it seems
3750 much more sensible not to leave this file open at all, so that is what now
3753 29. The long-running daemon process does not normally write to the log once it
3754 has entered its main loop, and it closes the log before doing so. This is
3755 so that log files can straightforwardly be renamed and moved. However,
3756 there are a couple of unusual error situations where the daemon does write
3757 log entries, and I had neglected to close the log afterwards.
3759 30. The text of an SMTP error response that was received during a remote
3760 delivery was being truncated at 512 bytes. This is too short for some of
3761 the long messages that one sometimes sees. I've increased the limit to
3764 31. It is now possible to make retry rules that apply only when a message has a
3765 specific sender, in particular, an empty sender.
3767 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3768 it possible to be selective about when SMTP synchronization is enforced.
3770 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3772 32. Implemented hosts_connection_nolog.
3774 33. Added an ACL for QUIT.
3776 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3779 35. Added mailbox_size and mailbox_filecount to appendfile.
3781 36. Added control = no_multiline_responses to ACLs.
3783 37. There was a bug in the logic of the code that waits for the clock to tick
3784 in the case where the clock went backwards by a substantial amount such
3785 that the microsecond fraction of "now" was more than the microsecond
3786 fraction of "then" (but the whole seconds number was less).
3788 38. Added support for the libradius Radius client library this is found on
3789 FreeBSD (previously only the radiusclient library was supported).
3795 1. When certain lookups returned multiple values in the form name=value, the
3796 quoting of the values was not always being done properly. Specifically:
3797 (a) If the value started with a double quote, but contained no whitespace,
3799 (b) If the value contained whitespace other than a space character (i.e.
3800 tabs or newlines or carriage returns) it was not quoted.
3801 This fix has been applied to the mysql and pgsql lookups by writing a
3802 separate quoting function and calling it from the lookup code. The fix
3803 should probably also be applied to nisplus, ibase and oracle lookups, but
3804 since I cannot test any of those, I have not disturbed their existing code.
3806 2. A hit in the callout cache for a specific address caused a log line with no
3807 reason for rejecting RCPT. Now it says "Previous (cached) callout
3808 verification failure".
3810 3. There was an off-by-one bug in the queryprogram router. An over-long
3811 return line was truncated at 256 instead of 255 characters, thereby
3812 overflowing its buffer with the terminating zero. As well as fixing this, I
3813 have increased the buffer size to 1024 (and made a note to document this).
3815 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3816 when Exim is waiting for an SMTP response from a remote server, Exim
3817 restarts its select() call on the socket, thereby resetting its timeout.
3818 This is not a problem when such interrupts are rare. Somebody set up a cron
3819 job to run exiwhat every 2 minutes, which is less than the normal select()
3820 timeout (5 or 10 minutes). This meant that the select() timeout never
3821 kicked in because it was always reset. I have fixed this by comparing the
3822 time when an interrupt arrives with the time at the start of the first call
3823 to select(). If more time than the timeout has elapsed, the interrupt is
3824 treated as a timeout.
3826 5. Some internal re-factoring in preparation for the addition of Sieve
3827 extensions (by MH). In particular, the "personal" test is moved to a
3828 separate function, and given an option for scanning Cc: and Bcc: (which is
3829 not set for Exim filters).
3831 6. When Exim created an email address using the login of the caller as the
3832 local part (e.g. when creating a From: or Sender: header line), it was not
3833 quoting the local part when it contained special characters such as @.
3835 7. Installed new OpenBSD configuration files.
3837 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3838 try to make them clearer.
3840 9. Callout options, other than the timeout value, were being ignored when
3841 verifying sender addresses in header lines. For example, when using
3843 verify = header_sender/callout=no_cache
3845 the cache was (incorrectly) being used.
3847 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3848 only the Cygwin environment.
3850 11. When return_path_on_delivery was set as a log selector, if different remote
3851 addresses in the same message used different return paths and parallel
3852 remote delivery occurred, the wrong values would sometimes be logged.
3853 (Whenever a remote delivery process finished, the return path value from
3854 the most recently started remote delivery process was logged.)
3856 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3857 lines when AUTH and/or TLS are in use. This is the "received protocol"
3858 field. Exim used to use "asmtp" for authenticated SMTP, without any
3859 indication (in the protocol name) for TLS use. Now it follows the RFC and
3860 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3861 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3862 names appear in log lines as well as in Received: header lines.
3864 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3865 extensions, and comparison tests, and to fix some bugs.
3867 14. Changes to the "personal" filter test:
3869 (1) The test was buggy in that it was just doing the equivalent of
3870 "contains" tests on header lines. For example, if a user's address was
3871 anne@some.where, the "personal" test would incorrectly be true for
3873 To: susanne@some.where
3875 This test is now done by extracting each address from the header in turn,
3876 and checking the entire address. Other tests that are part of "personal"
3877 are now done using regular expressions (for example, to check local parts
3878 of addresses in From: header lines).
3880 (2) The list of non-personal local parts in From: addresses has been
3881 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3882 taken from the Sieve specification recommendations.
3884 (3) If the message contains any header line starting with "List-" it is
3885 treated as non-personal.
3887 (4) The test for "circular" in the Subject: header line has been removed
3888 because it now seems ill-conceived.
3890 15. Minor typos in src/EDITME comments corrected.
3892 16. Installed latest exipick from John Jetmore.
3894 17. If headers_add on a router specified a text string that was too long for
3895 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3896 of string_sprintf() is now avoided.
3898 18. $message_body_size was not set (it was always zero) when running the DATA
3899 ACL and the local_scan() function.
3901 19. For the "mail" command in an Exim filter, no default was being set for
3902 the once_repeat time, causing a random time value to be used if "once" was
3903 specified. (If the value happened to be <= 0, no repeat happened.) The
3904 default is now 0s, meaning "never repeat". The "vacation" command was OK
3905 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3906 (I found it when inspecting the code).
3908 20. There is now an overall timeout for performing a callout verification. It
3909 defaults to 4 times the callout timeout, which applies to individual SMTP
3910 commands during the callout. The overall timeout applies when there is more
3911 than one host that can be tried. The timeout is checked before trying the
3912 next host. This prevents very long delays if there are a large number of
3913 hosts and all are timing out (e.g. when the network connections are timing
3914 out). The value of the overall timeout can be changed by specifying an
3915 additional sub-option for "callout", called "maxwait". For example:
3917 verify = sender/callout=5s,maxwait=20s
3919 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3920 to the end before writing, but this should make it even safer).
3922 22. Exim was forgetting that it had advertised PIPELINING for the second and
3923 subsequent messages on an SMTP connection. It was also not resetting its
3924 memory on STARTTLS and an internal HELO.
3926 23. When Exim logs an SMTP synchronization error within a session, it now
3927 records whether PIPELINING has been advertised or not.
3929 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3930 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3931 rather than long int.
3933 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3935 26. Added the never_mail option to autoreply.
3941 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3942 crash if the getsockname() call failed; this can happen if a connection is
3943 closed very soon after it is established. The problem was simply in the
3944 order in which certain operations were done, causing Exim to try to write
3945 to the SMTP stream before it had set up the file descriptor. The bug has
3946 been fixed by making things happen in the correct order.
3952 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3953 before the connection was closed, thus losing the rejection response.
3955 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3956 some early Solaris releases, but causes trouble in current releases where
3957 socklen_t is defined.
3959 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3962 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3965 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3966 that releasing the top of it at the end releases what was used for sub-
3967 expansions (unless the block got too big). However, discard this block if
3968 the first thing is a variable or header, so that we can use its block when
3969 it is dynamic (useful for very large $message_headers, for example).
3971 6. Lookups now cache *every* query, not just the most recent. A new, separate
3972 store pool is used for this. It can be recovered when all lookup caches are
3973 flushed. Lookups now release memory at the end of their result strings.
3974 This has involved some general refactoring of the lookup sources.
3976 7. Some code has been added to the store_xxx() functions to reduce the amount
3977 of flapping under certain conditions.
3979 8. log_incoming_interface used to affect only the <= reception log lines. Now
3980 it causes the local interface and port to be added to several more SMTP log
3981 lines, for example "SMTP connection from", and rejection lines.
3983 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3985 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3987 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3988 could be overwritten at the end of the current message (or the start of a
3989 new message if it was set in a HELO ACL). The value is now preserved for
3990 the duration of the SMTP connection.
3992 12. If a transport had a headers_rewrite setting, and a matching header line
3993 contained an unqualified address, that address was qualified, even if it
3994 did not match any rewriting rules. The underlying bug was that the values
3995 of the flags that permit the existence of unqualified sender and recipient
3996 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3997 non-local messages, and by -bnq for local messages) were not being
3998 preserved with the message after it was received.
4000 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4001 "next input=" as part of the text comprising the host identity instead of
4002 the correct text. The code was using the same buffer for two different
4003 strings. However, depending on which order the printing function evaluated
4004 its arguments, the bug did not always show up. Under Linux, for example, my
4005 test suite worked just fine.
4007 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4008 doesn't work with some older versions of Perl. It has been changed to "my",
4009 which in any case is probably the better facility to use.
4011 15. A really picky compiler found some instances of statements for creating
4012 error messages that either had too many or two few arguments for the format
4015 16. The size of the buffer for calls to the DNS resolver has been increased
4016 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4017 for addresses that have a lot of PTR records. This alleviates a problem; it
4018 does not fully solve it.
4020 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4021 buffer now truncates the list and logs the incident, which is the same
4022 action as happens when Exim is looking up a host name and its aliases.
4023 Previously in this situation something unpredictable would happen;
4024 sometimes it was "internal error: store_reset failed".
4026 18. If a server dropped the connection unexpectedly when an Exim client was
4027 using GnuTLS and trying to read a response, the client delivery process
4028 crashed while trying to generate an error log message.
4030 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4031 string, for example:
4033 warn message = H1: something\nH2: something
4035 the text was added as a single header line from Exim's point of view
4036 though it ended up OK in the delivered message. However, searching for the
4037 second and subsequent header lines using $h_h2: did not work. This has been
4038 fixed. Similarly, if a system filter added multiple headers in this way,
4039 the routers could not see them.
4041 20. Expanded the error message when iplsearch is called with an invalid key to
4042 suggest using net-iplsearch in a host list.
4044 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4045 ACLs are no longer actually imposed (and a message to that effect is
4048 22. If a "gecos" field in a passwd entry contained escaped characters, in
4049 particular, if it contained a \" sequence, Exim got it wrong when building
4050 a From: or a Sender: header from that name. A second bug also caused
4051 incorrect handling when an unquoted " was present following a character
4052 that needed quoting.
4054 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4055 was not being matched caselessly.
4057 24. Arranged for all hyphens in the exim.8 source to be escaped with
4060 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4061 properly. Recipient callout cache records were still being keyed to include
4062 the sender, even when use_sender was set false. This led to far more
4063 callouts that were necessary. The sender is no longer included in the key
4064 when use_sender is false.
4066 26. Added "control = submission" modifier to ACLs.
4068 27. Added the ${base62d: operator to decode base 62 numbers.
4070 28. dnsdb lookups can now access SRV records.
4072 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4073 the configuration file.
4075 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4076 (-v) mode. This makes the output for a verbose queue run more intelligible.
4078 31. Added a use_postmaster feature to recipient callouts.
4080 32. Added the $body_zerocount variable, containing the number of binary zero
4081 bytes in the message body.
4083 33. The time of last modification of the "new" subdirectory is now used as the
4084 "mailbox time last read" when there is a quota error for a maildir
4087 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4089 35. Added +ignore_unknown as a special item in host lists.
4091 36. Code for decoding IPv6 addresses in host lists is now included, even if
4092 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4093 address was recognized as an IP address, but was then not correctly decoded
4094 into binary, causing unexpected and incorrect effects when compared with
4101 1. Very minor rewording of debugging text in manualroute to say "list of
4102 hosts" instead of "hostlist".
4104 2. If verify=header_syntax was set, and a header line with an unqualified
4105 address (no domain) and a large number of spaces between the end of the
4106 name and the colon was received, the reception process suffered a buffer
4107 overflow, and (when I tested it) crashed. This was caused by some obsolete
4108 code that should have been removed. The fix is to remove it!
4110 3. When running in the test harness, delay a bit after writing a bounce
4111 message to get a bit more predictability in the log output.
4113 4. Added a call to search_tidyup() just before forking a reception process. In
4114 theory, someone could use a lookup in the expansion of smtp_accept_max_
4115 per_host which, without the tidyup, could leave open a database connection.
4117 5. Added the variables $recipient_data and $sender_data which get set from a
4118 lookup success in an ACL "recipients" or "senders" condition, or a router
4119 "senders" option, similar to $domain_data and $local_part_data.
4121 6. Moved the writing of debug_print from before to after the "senders" test
4124 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4125 problems for message scanning, either using a data ACL, or using
4126 local_scan() because the Received: header was not generated till after they
4127 were called (in order to set the time as the time of reception completion).
4128 I have revised the way this works. The header is now generated after the
4129 body is received, but before the ACL or local_scan() are called. After they
4130 are run, the timestamp in the header is updated.
4136 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4137 before starting a queue runner without re-exec. This happened only when
4138 deliver_drop_privilege was set or when the Exim user was set to root. The
4139 effect of the bug was that timeouts during subsequent deliveries caused
4140 crashes instead of being properly handled. The handler is now left at its
4141 default (and expected) setting.
4143 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4144 message, again when deliver_drop_privilege is set or Exim is run as root.
4145 The bug described in (1) was not present in this case, but the tidying up
4146 of the other signals was missing. I have made the two cases consistent.
4148 3. The ignore_target_hosts setting on a manualroute router was being ignored
4149 for hosts that were looked up using the /MX notation.
4151 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4154 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4155 operated on the sender address. After changing the $sender_address to <>
4156 for the sender address verify, Exim was re-instated it as the original
4157 (before rewriting) address, but remembering that it had rewritten it, so it
4158 wasn't rewriting it again. This bug also had the effect of breaking the
4159 sender address verification caching when the sender address was rewritten.
4161 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4162 This has been changed so that if the ip literal address matches
4163 ignore_target_hosts, the router declines.
4165 7. Added expansion conditions match_domain, match_address, and match_local_
4166 part (NOT match_host).
4168 8. The placeholder for the Received: header didn't have a length field set.
4170 9. Added code to Exim itself and to exim_lock to test for a specific race
4171 condition that could lead to file corruption when using MBX delivery. The
4172 issue is with the lockfile that is created in /tmp. If this file is removed
4173 after a process has opened it but before that process has acquired a lock,
4174 there is the potential for a second process to recreate the file and also
4175 acquire a lock. This could lead to two Exim processes writing to the file
4176 at the same time. The added code performs the same test as UW imapd; it
4177 checks after acquiring the lock that its file descriptor still refers to
4178 the same named file.
4180 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4181 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4184 11. Added the smtp_active_hostname option. If used, this will typically be made
4185 to depend on the incoming interface address. Because $interface_address is
4186 not set up until the daemon has forked a reception process, error responses
4187 that can happen earlier (such as "too many connections") no longer contain
4190 12. If an expansion in a condition on a "warn" statement fails because a lookup
4191 defers, the "warn" statement is abandoned, and the next ACL statement is
4192 processed. Previously this caused the whole ACL to be aborted.
4194 13. Added the iplsearch lookup type.
4196 14. Added ident_timeout as a log selector.
4198 15. Added tls_certificate_verified as a log selector.
4200 16. Added a global option tls_require_ciphers (compare the smtp transport
4201 option of the same name). This controls incoming TLS connections.
4203 17. I finally figured out how to make tls_require_ciphers do a similar thing
4204 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4205 before starting the TLS session.
4207 18. Tabs are now shown as \t in -bP output.
4209 19. If the log selector return_path_on_delivery was set, Exim crashed when
4210 bouncing a message because it had too many Received: header lines.
4212 20. If two routers both had headers_remove settings, and the first one included
4213 a superfluous trailing colon, the final name in the first list and the
4214 first name in the second list were incorrectly joined into one item (with a
4215 colon in the middle).
4221 1. Added -C and -D options to the exinext utility, mainly to make it easier
4222 to include in the automated testing, but these could be helpful when
4223 multiple configurations are in use.
4225 2. The exinext utility was not formatting the output nicely when there was
4226 an alternate port involved in the retry record key, nor when there was a
4227 message id as well (for retries that were specific to a specific message
4228 and a specific host). It was also confused by IPv6 addresses, because of
4229 the additional colons they contain. I have fixed the IPv4 problem, and
4230 patched it up to do a reasonable job for IPv6.
4232 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4233 delivery, the log line now contains "pipelined" if PIPELINING was used.
4235 4. An SMTP transport process used to panic and die if the bind() call to set
4236 an explicit outgoing interface failed. This has been changed; it is now
4237 treated in the same way as a connect() failure.
4239 5. A reference to $sender_host_name in the part of a conditional expansion
4240 that was being skipped was still causing a DNS lookup. This no longer
4243 6. The def: expansion condition was not recognizing references to header lines
4244 that used bh_ and bheader_.
4246 7. Added the _cache feature to named lists.
4248 8. The code for checking quota_filecount in the appendfile transport was
4249 allowing one more file than it should have been.
4251 9. For compatibility with Sendmail, the command line option
4259 and sets the incoming protocol and host name (for trusted callers). The
4260 host name and its colon can be omitted when only the protocol is to be set.
4261 Note the Exim already has two private options, -pd and -ps, that refer to
4262 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4263 "s", but I don't think that's a major issue.
4265 10. A number of refactoring changes to the code, none of which should affect
4268 (a) The number of logging options was getting close to filling up the
4269 32-bit word that was used as a bit map. I have split them into two classes:
4270 those that are passed in the argument to log_write(), and those that are
4271 only ever tested independently outside of that function. These are now in
4272 separate 32-bit words, so there is plenty of room for expansion again.
4273 There is no change in the user interface or the logging behaviour.
4275 (b) When building, for example, log lines, the code previously used a
4276 macro that called string_cat() twice, in order to add two strings. This is
4277 not really sufficiently general. Furthermore, there was one instance where
4278 it was actually wrong because one of the argument was used twice, and in
4279 one call a function was used. (As it happened, calling the function twice
4280 did not affect the overall behaviour.) The macro has been replaced by a
4281 function that can join an arbitrary number of extra strings onto a growing
4284 (c) The code for expansion conditions now uses a table and a binary chop
4285 instead of a serial search (which was left over from when there were very
4286 few conditions). Also, it now recognizes conditions like "pam" even when
4287 the relevant support is not compiled in: a suitably worded error message is
4288 given if an attempt is made to use such a condition.
4290 11. Added ${time_interval:xxxxx}.
4292 12. A bug was causing one of the ddress fields not to be passed back correctly
4293 from remote delivery subprocesses. The field in question was not being
4294 subsequently used, so this caused to problems in practice.
4296 13. Added new log selectors queue_time and deliver_time.
4298 14. Might have fixed a bug in maildirsizefile handling that threw up
4299 "unexpected character" debug warnings, and recalculated the data
4300 unnecessarily. In any case, I expanded the warning message to give more
4303 15. Added the message "Restricted characters in address" to the statements in
4304 the default ACL that block characters like @ and % in local parts.
4306 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4307 Three changes have been made:
4309 (a) There was a serious bug; a negative response to MAIL caused the whole
4310 recipient domain to be cached as invalid, thereby blocking all messages
4311 to all local parts at the same domain, from all senders. This bug has
4312 been fixed. The domain is no longer cached after a negative response to
4313 MAIL if the sender used is not empty.
4315 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4318 (c) A new callout option, "use_sender" has been added for people who want
4319 the modified behaviour.
4325 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4328 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4329 indeed breaks things for older releases.
4331 3. Added additional logging to the case where there is a problem reading data
4332 from a filter that is running in a subprocess using a pipe, in order to
4333 try to track down a specific problem.
4335 4. Testing facility fudge: when running in the test harness and attempting
4336 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4337 getting "No route to host". Convert this to a timeout.
4339 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4342 6. Some OS don't have socklen_t but use size_t instead. This affects the
4343 fifth argument of getsockopt() amongst other things. This is now
4344 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4345 can be set for individual OS. I have set it for SunOS5, OSF1, and
4346 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4347 some earlier ones do not.
4349 7. Change 4.30/15 was not doing the test caselessly.
4351 8. The standard form for an IPv6 address literal was being rejected by address
4352 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4353 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4354 this, as well as the form without the "IPv6" on the front (but only when
4355 address literals are enabled, of course).
4357 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4359 10. Exim crashed if a message with an empty sender address specified by -f
4360 encountered a router with an errors_to setting. This could be provoked only
4361 by a command such as
4365 where an empty string was supplied; "<>" did not hit this bug.
4367 11. Installed PCRE release 4.5.
4369 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4370 remained set. It is now erased.
4372 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4373 times from message ids (which are base 36 rather than the normal 62).
4375 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4376 were being counted as actual protocol errors, and logged if the log
4377 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4378 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4379 and DATA following a set of rejected RCPTs do not count as protocol errors.
4380 In other words, Exim assumes they were pipelined, though this may not
4381 actually be the case. Of course, in all cases the client gets an
4382 appropriate error code.
4384 15. If a lookup fails in an ACL condition, a message about the failure may
4385 be available; it is used if testing the ACL cannot continue, because most
4386 such messages specify what the cause of the deferral is. However, some
4387 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4388 that caused an old message to be retained and used if a later statement
4389 caused a defer, replacing the real cause of the deferral.
4391 16. If an IP address had so many PTR records that the DNS lookup buffer
4392 was not large enough to hold them, Exim could crash while trying to process
4393 the truncated data. It now detects and logs this case.
4395 17. Further to 4.21/58, another change has been made: if (and only if) the
4396 first line of a message (the first header line) ends with CRLF, a bare LF
4397 in a subsequent header line has a space inserted after it, so as not to
4398 terminate the header.
4400 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4401 unnecessarily, used atoi() instead of strtol(), and didn't check the
4402 termination when getting file sizes from file names by regex.
4404 19. Completely re-implemented the support for maildirsize files, in the light
4405 of a number of problems with the previous contributed implementation
4406 (4.30/29). In particular:
4408 . If the quota is zero, the maildirsize file is maintained, but no quota is
4411 . If the maildir directory does not exist, it is created before any attempt
4412 to write a maildirsize file.
4414 . The quota value in the file is just a cache; if the quota is changed in
4415 the transport, the new value overrides.
4417 . A regular expression is available for excluding directories from the
4420 20. The autoreply transport checks the characters in options that define the
4421 message's headers; it allows continued headers, but it was checking with
4422 isspace() after an embedded newline instead of explicitly looking for a
4425 21. If all the "regular" hosts to which an address was routed had passed their
4426 expiry times, and had not reached their retry times, the address was
4427 bounced, even if fallback hosts were defined. Now Exim should go on to try
4430 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4431 equivalent code in the SMTP transport. Some hosts send humungous responses
4432 to HELO/EHLO, more than 1024 it seems.
4434 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4435 gives compiler warnings in some environments. I've now done it "properly",
4438 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4439 (because of problems with the built-in one) was declared to return uschar *
4440 instead of char *, causing compiler failure.
4442 25. Fixed a file descriptor leak when processing alias/forward files.
4444 26. Fixed a minor format string issue in dbfn.c.
4446 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4448 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4449 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4452 29. When a sender address is verified, it is cached, to save repeating the test
4453 when there is more than one recipient in a message. However, when the
4454 verification involves a callout, it is possible for different callout
4455 options to be set for different recipients. It is too complicated to keep
4456 track of this in the cache, so now Exim always runs a verification when a
4457 callout is required, relying on the callout cache for the optimization.
4458 The overhead is duplication of the address routing, but this should not be
4461 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4462 to be verified with callout=postmaster, and the main callout worked but the
4463 postmaster check failed, the verification correctly failed. However, if a
4464 subsequent RCPT command asked for sender verification *without* the
4465 postmaster check, incorrect caching caused this verification also to fail,
4468 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4469 it was not caching the DNS options (qualify_single, search_parents) that
4470 were used when the lookup failed. A subsequent lookup with different
4471 options therefore always gave the same answer, though there were cases
4472 where it should not have. (Example: a "domains = !$mx_any" option on a
4473 dnslookup router: the "domains" option is always processed without any
4474 widening, but the router might have qualify_single set.) Now Exim uses the
4475 cached value only when the same options are set.
4477 32. Added John Jetmore's "exipick" utility to the distribution.
4479 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4480 than a timeout (e.g. a certificate is required, and is not provided), an
4481 Exim server now closes the connection immediately. Previously it waited for
4482 the client to close - but if the client is SSL, it seems that they each
4483 wait for each other, leading to a delay before one of them times out.
4485 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4486 maintained 0.8.x compatibility because I don't think many are using it, and
4487 it is clearly obsolete.
4489 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4492 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4493 client certificate was expired. A simple patch fixes this, though I don't
4494 understand the full logic of why the verify callback is called multiple
4497 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4498 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4499 which causes problems with some clients (such as the Certicom SSL Plus
4500 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4501 disables the coutermeasure allowing Eudora to connect."
4503 38. Exim was not checking that a write() to a log file succeeded. This could
4504 lead to Bad Things if a log got too big, in particular if it hit a file
4505 size limit. Exim now panics and dies if it cannot write to a log file, just
4506 as it does if it cannot open a log file.
4508 39. Modified OS/Makefile-Linux so that it now contains
4510 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4512 The two -D definitions ensure that Exim is compiled with large file
4513 support, which makes it possible to handle log files that are bigger than
4516 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4517 instance) a domain was checked against a named list that involved a lookup,
4518 causing $domain_data to be set, then another domain was checked against the
4519 same list, then the first domain was re-checked, the value of $domain_data
4520 after the final check could be wrong. In particular, if the second check
4521 failed, it could be set empty. This bug probably also applied to
4524 41. The strip_trailing_dot option was not being applied to the address given
4525 with the -f command-line option.
4527 42. The code for reading a message's header from the spool was incrementing
4528 $received_count, but never initializing it. This meant that the value was
4529 incorrect (doubled) while delivering a message in the same process in which
4530 it was received. In the most common configuration of Exim, this never
4531 happens - a fresh exec is done - but it can happen when
4532 deliver_drop_privilege is set.
4534 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4535 it now includes up to 150 characters of the unexpected data in the log
4538 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4539 and building data strings. The size of both of these buffers was 10 000
4540 bytes - far larger than anybody would *ever* want, thought I. Needless to
4541 say, somebody hit the limit. I have increased the maximum line length to
4542 20 000 and the maximum data length of concatenated lines to 100 000. I have
4543 also fixed two bugs, because there was no checking on these buffers. Tsk,
4544 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4545 buffer is too small.
4547 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4548 lsearch lookups. Now it does.
4550 46. When parsing a route_list item in a manualroute router, a fixed-length
4551 buffer was used for the list of hosts. I made this 1024 bytes long,
4552 thinking that nobody would ever have a list of hosts that long. Wrong.
4553 Somebody had a whole pile of complicated expansion conditions, and the
4554 string was silently truncated, leading to an expansion error. It turns out
4555 that it is easier to change to an unlimited length (owing to other changes
4556 that have happened since this code was originally written) than to build
4557 structure for giving a limitation error. The length of the item that
4558 expands into the list of hosts is now unlimited.
4560 47. The lsearch lookup could not handle data where the length of text line was
4561 more than 4095 characters. Such lines were truncated, leading to shortened
4562 data being returned. It should now handle lines of any length.
4564 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4565 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4568 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4569 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4570 no longer happens in comment lines. A list of replacements is now placed
4571 at the head of all of the source files, except those whose only change is
4572 to replace PERL_COMMAND in the very first #! line.
4574 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4575 messages on the queue, with a bottom-up merge sort, using code contributed
4576 by Michael Haardt. This should make operations like -bp somewhat faster on
4577 large queues. It won't affect queue runners, except when queue_run_in_order
4580 51. Installed eximstats 1.31 in the distribution.
4582 52. Added support for SRV lookups to the dnslookup router.
4584 53. If an ACL referred to $message_body or $message_body_end, the value was not
4585 reset for any messages that followed in the same SMTP session.
4587 54. The store-handling optimization for building very long strings was not
4588 differentiating between the different store pools. I don't think this
4589 actually made any difference in practice, but I've tidied it.
4591 55. While running the routers to verify a sender address, $sender_address
4592 was still set to the sender address. This is wrong, because when routing to
4593 send a bounce to the sender, it would be empty. Therefore, I have changed
4594 it so that, while verifying a sender address, $sender_address is set to <>.
4595 (There is no change to what happens when verifying a recipient address.)
4597 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4598 target A or AAAA records (if not already returned) without resetting the
4599 qualify_single or search_parents options of the DNS resolver. These are
4600 inappropriate in this case because the targets of MX and SRV records must
4601 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4602 target that, when qualified, matched something in the local domain. These
4603 two options are now turned off when doing these lookups.
4605 57. It seems that at least some releases of Reiserfs (which does not have the
4606 concept of a fixed number of inodes) returns zero and not -1 for the
4607 number of available inodes. This interacted badly with check_spool_inodes,
4608 which assumed that -1 was the "no such thing" setting. What I have done is
4609 to check that the total number of inodes is greater than zero before doing
4610 the test of how many are available.
4612 58. When a "warn" ACL statement has a log_message modifier, the message is
4613 remembered, and not repeated. This is to avoid a lot of repetition when a
4614 message has many recipients that cause the same warning to be written.
4615 Howewer, Exim was preserving the list of already written lines for an
4616 entire SMTP session, which doesn't seem right. The memory is now reset if a
4617 new message is started.
4619 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4620 debugging output unless log_rewrite was also set.
4622 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4623 of (int)(handle) when we know that handle contains (void *)(-1).
4625 61. The Exim daemon panic-logs an error return when it closes the incoming
4626 connection. However "connection reset by peer" seems to be common, and
4627 isn't really an error worthy of noting specially, so that particular error
4630 62. When Exim is trying to find all the local interfaces, it used to panic and
4631 die if the ioctl to get the interface flags failed. However, it seems that
4632 on at least one OS (Solaris 9) it is possible to have an interface that is
4633 included in the list of interfaces, but for which you get a failure error
4634 for this call. This happens when the interface is not "plumbed" into a
4635 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4636 failure of the "get flags" call assumes that the interface is down.
4638 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4639 makes life easier for people who are doing arithmetic on fields extracted
4640 from dates, where you often get leading zeros that should not be
4641 interpreted as octal.
4643 64. Added qualify_domain to the redirect router, to override the global
4646 65. If a pathologically long header line contained very many addresses (the
4647 report of this problem mentioned 10 000) and each of them was rewritten,
4648 Exim could use up a very large amount of memory. (It kept on making new
4649 copies of the header line as it rewrote, and never released the old ones.)
4650 At the expense of a bit more processing, the header rewriting function has
4651 been changed so that it no longer eats memory in this way.
4653 66. The generation of the Received: header has been moved from the time that a
4654 message starts to be received, to the time that it finishes. The timestamp
4655 in the Received: header should now be very close to that of the <= log
4656 line. There are two side-effects of this change:
4658 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4659 logged header lines no longer include the local Received: line, because
4660 it has not yet been created. The same applies to a copy of the message
4661 that is returned to a non-SMTP sender when a message is rejected.
4663 (b) When a filter file is tested using -bf, no additional Received: header
4664 is added to the test message. After some thought, I decided that this
4667 This change does not affect the value of $received_for. It is still set
4668 after address rewriting, but before local_scan() is called.
4670 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4672 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4673 gave an unhelpful panic error message, and a defer error. I have managed to
4674 change this behaviour so that it now rejects any supplied certificate,
4675 which seems right, as the list of acceptable certificates is empty.
4677 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4678 gave an unhelpful defer error. I have not managed to make this reject any
4679 supplied certificates, but the error message it gives is "no certificate
4680 supplied", which is not helpful.
4682 70. exigrep's output now also includes lines that are not associated with any
4683 message, but which match the given pattern. Implemented by a patch from
4684 Martin Sluka, which also tidied up the Perl a bit.
4686 71. Recipient callout verification, like sender verification, was using <> in
4687 the MAIL FROM command. This isn't really the right thing, since the actual
4688 sender may affect whether the remote host accepts the recipient or not. I
4689 have changed it to use the actual sender in the callout; this means that
4690 the cache record is now keyed on a recipient/sender pair, not just the
4691 recipient address. There doesn't seem to be a real danger of callout loops,
4692 since a callout by the remote host to check the sender would use <>.
4693 [SEE ABOVE: changed after hitting problems.]
4695 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4696 temporary errors. However, in the case of such a code being given after
4697 the end of a data transmission (i.e. after ".") Exim was failing to write
4698 a retry record for the message. (Yes, there was some broken host that was
4699 actually sending 8xx at this point.)
4701 73. An unknown lookup type in a host list could cause Exim to panic-die when
4702 the list was checked. (An example that provoked this was putting <; in the
4703 middle of a list instead of at the start.) If this happened during a DATA
4704 ACL check, a -D file could be left lying around. This kind of configuration
4705 error no longer causes Exim to die; instead it causes a defer errror. The
4706 incident is still logged to the main and panic logs.
4708 74. Buglet left over from Exim 3 conversion. The message "too many messages
4709 in one connection" was written to the rejectlog but not the mainlog, except
4710 when address rewriting (yes!) was being logged.
4712 75. Added write_rejectlog option.
4714 76. When a system filter was run not as root (that is, when system_filter_user
4715 was set), the values of the $n variables were not being returned to the
4716 main process; thus, they were not subsequently available in the $sn
4719 77. Added +return_path_on_delivery log selector.
4721 78. A connection timeout was being treated differently from recipients deferred
4722 when testing hosts_max_try with a message that was older than the host's
4723 retry timeout. (The host should not be counted, thus allowing all hosts to
4724 be tried at least once before bouncing.) This may have been the cause of an
4725 occasionally reported bug whereby a message would remain on the queue
4726 longer than the retry timeout, but would be bounced if a delivery was
4727 forced. I say "may" because I never totally pinned down the problem;
4728 setting up timeout/retry tests is difficult. See also the next item.
4730 79. The ultimate address timeout was not being applied to errors that involved
4731 a combination of host plus message (for example, a timeout on a MAIL
4732 command). When an address resolved to a number of possible hosts, and they
4733 were not all tried for each delivery (e.g. because of hosts_max_try), a
4734 message could remain on the queue longer than the retry timeout.
4736 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4739 81. Fixed an obscure SMTP outgoing bug which required at least the following
4740 conditions: (a) there was another message waiting for the same server;
4741 (b) the server returned 5xx to all RCPT commands in the first message so
4742 that the message was not completed; (c) the server dropped the connection
4743 or gave a negative response to the RSET that Exim sends to abort the
4744 transaction. The observed case was a dropped connection after DATA that had
4745 been sent in pipelining mode. That is, the server had advertised PIPELINING
4746 but was not implementing it correctly. The effect of the bug was incorrect
4747 behaviour, such as trying another host, and this could lead to a crash.
4753 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4754 and daemon.c were passed as pointers to ints; they should have been
4755 pointers to socklen_t variables (which are typically unsigned ints).
4757 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4760 3. Fixed a really odd bug that affected only the testing scheme; patching a
4761 certain fixed string in the binary changed the value of another string that
4762 happened to be identical to the end of the original first string.
4764 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4765 name", it returns that address as the IP address. On some operating
4766 systems (e.g. Solaris), it also passes back the IP address string as the
4767 "host name". However, on others (e.g. Linux), it passes back an empty
4768 string. Exim wasn't checking for this, and was changing the host name to an
4769 empty string, assuming it had been canonicized.
4771 5. Although rare, it is permitted to have more than one PTR record for a given
4772 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4773 all the names associated with an address, because they do in Solaris.
4774 However, it seems that they do not in Linux for data that comes from the
4775 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4776 I found this out when I moved to a new Linux workstation and tried to run
4777 the Exim test suite.
4779 To get round this problem I have changed the code so that it now does its
4780 own call to the DNS to look up PTR records when searching for a host name.
4781 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4782 addresses that are only in /etc/hosts are still found.
4784 This behaviour is, however, controlled by an option called host_lookup_
4785 order, which defaults to "bydns:byaddr". If people want to use the other
4786 order, or indeed, just use one or the other means of lookup, they can
4787 specify it in this variable.
4789 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4790 some operating systems, this comes back from gethostbyaddr() as an empty
4791 string, and this is what Exim used to test for. However, it seems that in
4792 other systems, "." is yielded. Exim now tests for this case too.
4794 7. The values of check_spool_space and check_log_space are now held internally
4795 as a number of kilobytes instead of an absolute number of bytes. If a
4796 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4797 kilobyte. This means that much larger values can be stored.
4799 8. Exim monitor: an attempt to get the action menu when not actually pointing
4800 at a message produces an empty menu entitled "No message selected". This
4801 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4802 no entries in it ("Shell widget menu has zero width and/or height"). So I
4803 have added a single, blank menu entry in this case.
4805 9. Added ${quote_local_part.
4807 10. MIME decoding is now applied to the contents of Subject: header lines when
4810 11. Now that a reference to $sender_host_address automatically causes a reverse
4811 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4812 host lookup before query-style lookups in lists that might use this
4813 variable. This has therefore been abolished, and the "net-" prefix is no
4814 longer necessary for query-style lookups.
4816 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4817 have been a typo for LFLAGS, so it has been changed.
4819 13. The install script calls Exim with "-C /dev/null" in order to find the
4820 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4821 to be output. Howeve, since Exim outputs its version number before the
4822 error, it didn't break the script. It just looked ugly. I fixed this by
4823 always allowing "-C /dev/null" if the caller is root.
4825 14. Ignore overlarge ACL variable number when reading spool file - insurance
4826 against a later release with more variables having written the file.
4828 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4829 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4830 this, as well as the form without the "IPv6" on the front.
4832 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4833 OS/Makefile-Darwin file.
4835 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4836 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4838 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4839 variable. However, some OS use ints for inodes. I've added cast to long int
4840 to get rid of the compiler warning.
4842 19. I had forgotten to lock out "/../" in configuration file names when
4843 ALT_CONFIG_PREFIX was set.
4845 20. Routers used for verification do not need to specify transports. However,
4846 if such a router generated a host list, and callout was configured, Exim
4847 crashed, because it could not find a port number from the (non-existent)
4848 transport. It now assumes port 25 in this circumstance.
4850 21. Added the -t option to exigrep.
4852 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4853 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4854 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4855 them is set, LOOKUP_LSEARCH is forced.
4857 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4859 24. Added sender and host information to the "rejected by local_scan()" log
4860 line; previously there was no indication of these.
4862 25. Added .include_if_exists.
4864 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4865 Linux. It turns out that not all file systems support this. Apparently some
4866 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4867 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4868 not supported on the file descriptor, is now ignored when Exim is trying to
4869 sync a directory. This applies only to Linux.
4871 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4873 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4874 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4877 29. Added support for maildirsize files from supplied patch (modified a bit).
4879 30. The use of :fail: followed by an empty string could lead Exim to respond to
4880 sender verification failures with (e.g.):
4882 550 Verification failed for <xxx>
4883 550 Sender verify failed
4885 where the first response line was missing the '-' that indicates it is not
4886 the final line of the response.
4888 31. The loop for finding the name of the user that called Exim had a hardwired
4889 limit of 10; it now uses the value of finduser_retries, which is used for
4890 all other user lookups.
4892 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4895 33. Exim was neglecting to zero errno before one call of strtol() when
4896 expanding a string and expecting an integer value. On some systems this
4897 resulted in spurious "integer overflow" errors. Also, it was casting the
4898 result into an int without checking.
4900 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4901 did not work. The code looks as if it has *never* worked, though it appears
4902 to have been documented since at least releast 1.62. I have made it work.
4904 35. The "timeout_DNS" error in retry rules, also documented since at least
4905 1.62, also never worked. As it isn't clear exactly what this means, and
4906 clearly it isn't a major issue, I have abolished the feature by treating it
4907 as "timeout", and writing a warning to the main and panic logs.
4909 36. The display of retry rules for -brt wasn't always showing the error code
4912 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4913 timeout_connect_A, timeout_connect_MX.
4915 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4916 to the empty sender.
4918 39. The daemon was not analysing the content of -oX till after it had closed
4919 stderr and disconnected from the controlling terminal. This meant that any
4920 syntax errors were only noted on the panic log, and the return code from
4921 the command was 0. By re-arranging the code a little, I've made the
4922 decoding happen first, so such errors now appear on stderr, and the return
4923 code is 1. However, the actual setting up of the sockets still happens in
4924 the disconnected process, so errors there are still only recorded on the
4927 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4928 connections (as happens on some IP stacks) was logged at start up time as
4929 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4930 it from "IPv6 and IPv4", which means that two separate sockets are being
4933 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4934 says whether AF_INET or AF_INET6 was passed as an argument.
4936 42. Exiwhat output was messed up when time zones were included in log
4939 43. Exiwhat now gives more information about the daemon's listening ports,
4940 and whether -tls-on-connect was used.
4942 44. The "port" option of the smtp transport is now expanded.
4944 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4945 silently ignored. Now an error message is written to the main and panic
4948 46. There's a new ACL modifier called "logwrite" which writes to a log file
4949 as soon as it is encountered.
4951 47. Added $local_user_uid and $local_user_gid at routing time.
4953 48. Exim crashed when trying to verify a sender address that was being
4956 49. Exim was recognizing only a space character after ".include". It now also
4957 recognizes a tab character.
4959 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4960 extracting the relevant information from the specification. The man page no
4961 longer contains scrambled data for the -d option, and I've added a section
4962 at the front about calling Exim under different names.
4964 51. Added "extra_headers" argument to the "mail" command in filter files.
4966 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4969 53. Installed eximstats 1.29.
4971 54. Added transport_filter_timeout as a generic transport option.
4973 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4974 Cc: header lines. This was required by RFC 822, but it not required by RFC
4977 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4978 incoming messages that did not have them. Now it does so only if the
4979 message originates locally, that is, if there is no associated remote host
4980 address. When Resent- header lines are present, this applies to the Resent-
4981 lines rather than the non-Resent- lines.
4983 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4984 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4986 58. Messages for configuration errors now include the name of the main
4987 configuration file - useful now that there may be more than one file in a
4988 list (.included file names were always shown).
4990 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4991 for those rare installations that do not start the daemon as root or run it
4992 setuid root. I've cut out the call to initgroups() if the daemon is not
4995 60. The Exim user and group can now be bound into the binary as text strings
4996 that are looked up at the start of Exim's processing.
4998 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5000 62. Added $mailstore_basename variable.
5002 63. Installed patch to sieve.c from Michael Haardt.
5004 64. When Exim failed to open the panic log after failing to open the main log,
5005 the original message it was trying to log was written to stderr and debug
5006 output, but if they were not available (the usual case in production), it
5007 was lost. Now it is written to syslog before the two lines that record the
5008 failures to open the logs.
5010 65. Users' Exim filters run in subprocesses under the user's uid. It is
5011 possible for a "deliver" command or an alias in a "personal" command to
5012 provoke an address rewrite. If logging of address rewriting is configured,
5013 this fails because the process is not running as root or exim. There may be
5014 a better way of dealing with this, but for the moment (because 4.30 needs
5015 to be released), I have disabled address rewrite logging when running a
5016 filter in a non-root, non-exim process.
5022 1. The buildconfig auxiliary program wasn't quoting the value set for
5023 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5024 not defined. This bug was masked in 4.22 by the effect that was fixed in
5027 2. Some messages that were rejected after a message id was allocated were
5028 shown as "incomplete" by exigrep. It no longer does this for messages that
5029 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5031 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5032 have allow_domain_literals set, the ID did not get logged in the <= line.
5033 Domain literals are now always recognized in Message-ID: header lines.
5035 4. The first argument for a ${extract expansion item is the key name or field
5036 number. Leading and trailing spaces in this item were not being ignored,
5037 causing some misleading effects.
5039 5. When deliver_drop_privilege was set, single queue runner processes started
5040 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5041 same command in the process it spins off) were not dropping privilege.
5043 6. When the daemon running as "exim" started a queue runner, it always
5044 re-executed Exim in the spun-off process. This is a waste of effort when
5045 deliver_drop_privilege is set. The new process now just calls the
5046 queue-runner function directly.
5052 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5055 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5056 ignored. Though the use of -oP was forcing the writing of a pid file, it
5057 was always written to the default place.
5059 3. If the message "no IP address found for host xxxx" is generated during
5060 incoming verification, it is now followed by identification of the incoming
5061 connection (so you can more easily find what provoked it).
5063 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5065 5. Added some features to "harden" Exim a bit more against certain attacks:
5067 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5068 be put in Local/Makefile. This is like the never_users runtime option,
5069 but it cannot be overridden. The default setting is "root".
5071 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5072 prefix string with which any file named in a -C command line option
5075 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5076 is retained for -C and -D only if the caller of Exim is root. Without
5077 it, the exim user may also use -C and -D and retain privilege.
5079 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5080 command line option is disabled.
5082 6. Macro names set by the -D option must start with an upper case letter, just
5083 like macro names defined in the configuration file.
5085 7. Added "dereference=" facility to LDAP.
5087 8. Two instances of the typo "uknown" in the source files are fixed.
5089 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5090 the Configure-Makefile script screwed up while processing it.
5092 10. Incorporated PCRE 4.4.
5094 11. The SMTP synchronization check was not operating right at the start of an
5095 SMTP session. For example, it could not catch a HELO sent before the client
5096 waited for the greeting. There is now a check for outstanding input at the
5097 point when the greeting is written. Because of the duplex, asynchronous
5098 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5099 way, but not yet received, when the check is performed.
5101 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5102 on TCP/IP sockets, because this apparently causes some broken clients to
5105 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5106 unchanged) from the Cygwin maintainer.
5108 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5109 was supported instead of testing for mbx. Effectively a typo.
5111 15. The spa authenticator server code was not checking that the input it
5112 received was valid base64.
5114 16. The debug output line for the "set" modifier in ACLs was not showing the
5115 name of the variable that was being set.
5117 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5119 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5120 lookup on its own. Something else was needed to trigger the lookup. For
5121 example, a match in host_lookup or the need for a host name in a host list.
5122 Now, if $sender_host_name is referenced and the host name has not yet been
5123 looked up, a lookup is performed. If the lookup fails, the variable remains
5124 empty, and $host_lookup_failed is set to "1".
5126 19. Added "eqi" as a case-independent comparison operator.
5128 20. The saslauthd authentication condition could segfault if neither service
5129 nor realm was specified.
5131 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5132 error message that was logged was misleading, and incoming SMTP
5133 connections were dropped. The message is now more accurate, and temporary
5134 errors are given to SMTP connections.
5136 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5137 (except RSET) with a 421 error, until QUIT is received. However, it was
5138 failing to send a response to QUIT.
5140 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5141 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5142 ACL is now run after the helo_try_verify_hosts code.
5144 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5145 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5146 case-independent, so other case variants are also recognized). Apparently
5147 some systems use these upper case variants.
5149 25. If more than two messages were waiting for the same host, and a transport
5150 filter was specified for the transport, Exim sent two messages over the
5151 same TCP/IP connection, and then failed with "socket operation on non-
5152 socket" when it tried to send the third.
5154 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5156 27. The extern definition of crypt16() in expand.c was not being excluded when
5157 the OS had its own crypt16() function.
5159 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5160 as a preferred synonym for return_size_limit, both as an option and as an
5163 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5165 30. Changed the default configuration ACL to relax the local part checking rule
5166 for addresses that are not in any local domains. For these addresses,
5167 slashes and pipe symbols are allowed within local parts, but the sequence
5168 /../ is explicitly forbidden.
5170 31. SPA server authentication was not clearing the challenge buffer before
5173 32. log_message in a "warn" ACL statement was writing to the reject log as
5174 well as to the main log, which contradicts the documentation and doesn't
5175 seem right (because no rejection is happening). So I have stopped it.
5177 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5178 However, I am unable to do any testing of this.
5180 34. Fixed an infelicity in the appendfile transport. When checking directories
5181 for a mailbox, to see if any needed to be created, it was accidentally
5182 using path names with one or more superfluous leading slashes; tracing
5183 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5185 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5186 contents are added to the log line that is written for every discarded
5187 recipient. (Previously a log_message setting was ignored.)
5189 36. The ${quote: operator now quotes the string if it is empty.
5191 37. The install script runs exim in order to find its version number. If for
5192 some reason other than non-existence or emptiness, which it checks, it
5193 could not run './exim', it was installing it with an empty version number,
5194 i.e. as "exim-". This error state is now caught, and the installation is
5197 38. An argument was missing from the function that creates an error message
5198 when Exim fails to connect to the socket for saslauthd authentication.
5199 This could cause Exim to crash, or give a corrupted message.
5201 39. Added isip, isip4, and isip6 to ${if conditions.
5203 40. The ACL variables $acl_xx are now saved with the message, and can be
5204 accessed later in routers, transports, and filters.
5206 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5207 strings in the file are not string-expanded.
5209 42. If a MAIL command specified a SIZE value that was too large to fit into an
5210 int variable, the check against message_size_limit failed. Such values are
5211 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5212 day this will have to be increased, but I don't think I want to be around
5213 when emails are that large.
5220 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5221 iconv() is not standard in FreeBSD.
5223 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5224 IPv6 enabled. The observed symptom was a segmentation fault on return from
5225 the function os_common_find_running_interfaces() in src/os.c.
5227 3. In the check_special_case() function in daemon.c I had used "errno" as an
5228 argument name, which causes warnings on some systems. This was basically a
5229 typo, since it was named "eno" in the comments!
5231 4. The code that waits for the clock to tick (at a resolution of some fraction
5232 of a second) so as to ensure message-id uniqueness was always waiting for
5233 at least one whole tick, when it could have waited for less. [This is
5234 almost certainly not relevant at current processor speeds, where it is
5235 unlikely to ever wait at all. But we try to future-proof.]
5237 5. The function that sleeps for a time interval that includes fractions of a
5238 second contained a race. It did not block SIGALRM between setting the
5239 timer, and suspending (a couple of lines later). If the interval was short
5240 and the sigsuspend() was delayed until after it had expired, the suspension
5241 never ended. On busy systems this could lead to processes getting stuck for
5244 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5245 process, before it forks any delivery processes. The open lookup caching
5246 mechanism meant that the open file or database connection was passed into
5247 the delivery process. The problem was that delivery processes always tidy
5248 up cached lookup data. This could cause a problem for the next delivery
5249 process started by the queue runner, because the external queue runner
5250 process does not know about the closure. So the next delivery process
5251 still has data in the lookup cache. In the case of a file lookup, there was
5252 no problem because closing a file descriptor in a subprocess doesn't affect
5253 the parent. However, if the lookup was caching a connection to a database,
5254 the connection was closed, and the second delivery process was likely to
5255 see errors such as "PGSQL: query failed: server closed the connection
5256 unexpectedly". The problem has been fixed by closing all cached lookups
5257 in a queue runner before running a delivery process.
5259 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5260 seem to have the "const" qualifier which it has on other OS. I've
5263 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5264 *of the same type* (client or server) with the same public name that an
5265 error should be diagnosed.
5267 9. When Exim looked up a host name for an IP address, but failed to find the
5268 original IP address when looking up the host name (a safety check), it
5269 output the message "<ip address> does not match any IP for NULL", which was
5270 confusing, to say the least. The bug was that the host name should have
5271 appeared instead of "NULL".
5273 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5274 user that is built into the binary, and the -C or -D options is used, root
5275 privilege is dropped before the configuration file is read. In addition,
5276 logging is switched to stderr instead of the normal log files. If the
5277 configuration then re-defines the Exim user, the unprivileged environment
5278 is probably not what is expected, so Exim logs a panic warning message (but
5281 However, if deliver_drop_privilege is set, the unprivileged state may well
5282 be exactly what is intended, so the warning has been cut out in that case,
5283 and Exim is allowed to try to write to its normal log files.
5289 1. smtp_return_error_details was not giving details for temporary sender
5290 or receiver verification errors.
5292 2. Diagnose a configuration error if two authenticators have the same public
5295 3. Exim used not to create the message log file for a message until the first
5296 delivery attempt. This could be confusing when incoming messages were held
5297 for policy or load reasons. The message log file is now created at the time
5298 the message is received, and an initial "Received" line is written to it.
5300 4. The automatically generated man page for command line options had a minor
5301 bug that caused no ill effects; however, a more serious problem was that
5302 the procedure for building the man page automatically didn't always
5303 operate. Consequently, release 4.20 contains an out-of-date version. This
5304 shouldn't happen again.
5306 5. When building Exim with embedded Perl support, the script that builds the
5307 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5308 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5310 6. The freeze_tell option was not being used for messages that were frozen on
5311 arrival, either by an ACL or by local_scan().
5313 7. Added the smtp_incomplete_transaction log selector.
5315 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5316 was accepting AUTH without a new EHLO.
5318 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5319 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5322 10. Logging of TCP/IP connections (when configured) now happens in the main
5323 daemon process instead of the child process, so that the TCP/IP connection
5324 count is more accurate (but it can never be perfect).
5326 11. The use of "drop" in a nested ACL was not being handled correctly in the
5327 outer ACL. Now, if condition failure induced by the nested "drop" causes
5328 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5329 or "require"), the connection is dropped.
5331 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5332 that yield "discard" can now be used with an "accept" or a "discard" verb,
5333 but an error is generated for any others (because I can't see a useful way
5334 to define what should happen).
5336 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5337 are now processed in the same way as lines in the Exim configuration file.
5338 In particular, continuation lines are supported.
5340 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5342 15. Added -ti meaning -t -i.
5344 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5345 domains, and warn by logging if others are found.
5347 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5348 returned from GIFCONF when Exim is trying to find the list of interfaces on
5349 a host. The code in os.c has been modified to copy each ifreq to an aligned
5350 structure in all cases.
5352 Also, in some cases, the returned ifreq's were being copied to a 'struct
5353 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5354 means the last couple of bytes of an IPv6 address could be chopped if the
5355 ifreq contained only a normal sockaddr (14 bytes storage).
5357 18. Named domain lists were not supported in the hosts_treat_as_local option.
5358 An entry such as +xxxx was not recognized, and was treated as a literal
5361 19. Ensure that header lines added by a DATA ACL are included in the reject log
5362 if the ACL subsequently rejects the message.
5364 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5365 MD5 (which is deprecated).
5367 21. When testing a filter file using -bf, Exim was writing a message when it
5368 took the sender from a "From " line in the message, but it was not doing so
5369 when it took $return_path from a Return-Path: header line. It now does.
5371 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5372 with a valid header line field name (a series of printing characters
5373 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5375 23. Changed "disc" in the source to "disk" to conform to the documentation and
5376 the book and for uniformity.
5378 24. Ignore Sendmail's -Ooption=value command line item.
5380 25. When execve() failed while trying to run a command in a pipe transport,
5381 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5382 could be confused with a return value of 69 from the command itself. This
5383 has been changed to 127, the value the shell returns if it is asked to run
5384 a non-existent command. The wording for the related log line suggests a
5385 non-existent command as the problem.
5387 26. If received_header_text expands to an empty string, do not add a Received:
5388 header line to the message. (Well, it adds a token one on the spool, but
5389 marks it "old" so that it doesn't get used or transmitted.)
5391 27. Installed eximstats 1.28 (addition of -nt option).
5393 28. There was no check for failure on the call to getsockname() in the daemon
5394 code. This can fail if there is a shortage of resources on the system, with
5395 ENOMEM, for example. A temporary error is now given on failure.
5397 29. Contrary to the C standard, it seems that in some environments, the
5398 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5399 program. Exim now does this explicitly; it affects the formatting of
5400 timestamps using strftime().
5402 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5403 complaints. I've now initialized all the variables, to avoid this.
5405 32. Header lines added by a system filter were not being "seen" during
5406 transport-time rewrites.
5408 33. The info_callback() function passed to OpenSSL is set up with type void
5409 (*)(SSL *, int, int), as described somewhere. However, when calling the
5410 function (actually a macro) that sets it up, the type void(*)() is
5411 expected. I've put in a cast to prevent warnings from picky compilers.
5413 34. If a DNS black list lookup found a CNAME record, but there were no A
5414 records associated with the domain it pointed at, Exim crashed.
5416 35. If a DNS black list lookup returned more than one A record, Exim ignored
5417 all but the first. It now scans all returned addresses if a particular IP
5418 value is being sought. In this situation, the contents of the
5419 $dnslist_value variable are a list of all the addresses, separated by a
5422 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5423 to accept a host name and all its aliases if the forward lookup for any of
5424 them yielded the IP address of the incoming connection. Now it accepts only
5425 those names whose forward lookup yields the correct IP address. Any other
5426 names are discarded. This closes a loophole whereby a rogue DNS
5427 administrator could create reverse DNS records to break through a
5428 wildcarded host restriction in an ACL.
5430 37. If a user filter or a system filter that ran in a subprocess used any of
5431 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5432 the wrong values were passed to the pipe command ($thisaddress had the
5433 value of $0, $0 had the value of $1, etc). This bug was introduced by
5434 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5436 38. Improved the line breaking for long SMTP error messages from ACLs.
5437 Previously, if there was no break point between 40 and 75 characters, Exim
5438 left the rest of the message alone. Two changes have been made: (a) I've
5439 reduced the minimum length to 35 characters; (b) if it can't find a break
5440 point between 35 and 75 characters, it looks ahead and uses the first one
5441 that it finds. This may give the occasional overlong line, but at least the
5442 remaining text gets split now.
5444 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5445 file descriptors might be low, and that setting 1000 would always raise it.
5446 It turns out that in some environments, the limit is already over 1000 and
5447 that lowering it causes trouble. So now Exim takes care not to decrease it.
5449 40. When delivering a message, the value of $return_path is set to $sender_
5450 address at the start of routing (routers may change the value). By an
5451 oversight, this default was not being set up when an address was tested by
5452 -bt or -bv, which affected the outcome if any router or filter referred to
5455 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5456 log only when "message" or "log_message" are set. However, if one of the
5457 conditions was an address verification, or a call to a nested ACL, the
5458 messages generated by the underlying test were being passed through. This
5459 no longer happens. The underlying message is available in $acl_verify_
5460 message for both "message" and "log_message" expansions, so it can be
5461 passed through if needed.
5463 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5464 new expansion $bh_ to give the encoded byte string without charset
5465 translation. Translation happens only if iconv() is available; HAVE_ICONV
5466 indicates this at build time. HEADERS_CHARSET gives the charset to
5467 translate to; headers_charset can change it in the configuration, and
5468 "headers charset" can change it in an individual filter file.
5470 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5471 that creates RFC 2047 encoded "words" labels them as that charset instead
5472 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5473 expansion operator; (ii) when Exim creates a From: line for a local
5474 message; (iii) when a header line is rewritten to include a "phrase" part.
5476 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5477 buggy, causing it to skip the first lines of messages whose message ID
5478 ended in 'D'. This would not have bitten before Exim release 4.14, because
5479 message IDs were unlikely to end in 'D' before then. The effect was to have
5480 incorrect size information for certain domains.
5482 45. #include "config.h" was missing at the start of the crypt16.c module. This
5483 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5486 46. If there was a timeout during a "random" callout check, Exim treated it as
5487 a failure of the random address, and carried on sending RSET and the real
5488 address. If the delay was just some slowness somewhere, the response to the
5489 original RCPT would be taken as a response to RSET and so on, causing
5490 mayhem of various kinds.
5492 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5493 when I implemented it. It didn't allow for the fact that some option values
5494 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5495 the right test for positive values.
5497 48. Domain names in DNS records are case-independent. Exim always looks them up
5498 in lower case. Some resolvers return domain names in exactly the case they
5499 appear in the zone file, that is, they may contain uppercase letters. Not
5500 all resolvers do this - some return always lower case. Exim was treating a
5501 change of case by a resolver as a change of domain, similar to a widening
5502 of a domain abbreviation. This triggered its re-routing code and so it was
5503 trying to route what was effectively the same domain again. This normally
5504 caused routing to fail (because the router wouldn't handle the domain
5505 twice). Now Exim checks for this case specially, and just changes the
5506 casing of the domain that it ultimately uses when it transmits the message
5509 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5512 50. If a filter generated a file delivery with a non-absolute name (possible if
5513 no home directory exists for the router), the forbid_file option was not
5516 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5517 the existing equality matching.
5519 52. Exim was using ints instead of ino_t variables in some places where it was
5520 dealing with inode numbers.
5522 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5523 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5524 called TMPDIR, and if it finds it is different, it changes its value.
5526 54. The smtp_printf() function is now made available to local_scan() so
5527 additional output lines can be written before returning. There is also an
5528 smtp_fflush() function to enable the detection of a dropped connection.
5529 The variables smtp_input and smtp_batched_input are exported to
5532 55. Changed the default runtime configuration: the message "Unknown user"
5533 has been removed from the ACL, and instead placed on the localuser router,
5534 using the cannot_route_message feature. This means that any verification
5535 failures that generate their own messages won't get overridden. Similarly,
5536 the "Unrouteable address" message that was in the ACL for unverifiable
5537 relay addresses has also been removed.
5539 56. Added hosts_avoid_esmtp to the smtp transport.
5541 57. The exicyclog script was not checking for the esoteric option
5542 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5543 will work only if exicyclog is run under the appropriate euid.
5545 58. Following a discussion on the list, the rules by which Exim recognises line
5546 endings on incoming messages have been changed. The -dropcr and drop_cr
5547 options are now no-ops, retained only for backwards compatibility. The
5548 following line terminators are recognized: LF CRLF CR. However, special
5549 processing applies to CR:
5551 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5552 nor a local message in the state where . is a terminator.
5554 (ii) If a bare CR is encountered in a header line, an extra space is added
5555 after the line terminator so as not to end the header. The reasoning
5556 behind this is that bare CRs in header lines are most likely either
5557 to be mistakes, or people trying to play silly games.
5559 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5560 was being incorrectly given as 18 bytes larger than it should have been.
5561 This is a VOB (very old bug).
5563 60. This may never have affected anything current, but just in case it has:
5564 When the local host is found other than at the start of a list of hosts,
5565 the local host, those with the same MX, and any that follow, are discarded.
5566 When the list in question was part of a longer list of hosts, the following
5567 hosts (not currently being processed) were also being discarded. This no
5568 longer happens. I'm not sure if this situation could ever has previously
5571 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5574 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5575 header. This is something that is recommended in a new Internet Draft, and
5576 is something that is documented as being done by Sendmail. There are two
5577 possible values. For messages generated by the autoreply transport, Exim
5580 Auto-Submitted: auto-replied
5582 whereas for all other generated messages (e.g. bounces) it adds
5584 Auto-Submitted: auto-generated
5586 63. The "personal" condition in filters now includes a test for the
5587 Auto-Submitted: header. If it contains the string "auto-" the message it
5588 not considered personal.
5590 64. Added rcpt_include_affixes as a generic transport option.
5592 65. Added queue_only_override (default true).
5594 66. Added the syslog_duplication option.
5596 67. If what should have been the first header line of a message consisted of
5597 a space followed by a colon, Exim was mis-interpreting it as a header line.
5598 It isn't of course - it is syntactically invalid and should therefore be
5599 treated as the start of the message body. The misbehaviour could have
5600 caused a number of strange effects, including loss of data in subsequent
5601 header lines, and spool format errors.
5603 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5604 client host had authenticated. This control can now be exercised by an ACL
5605 for more flexibility.
5607 69. By default, callouts do not happen when testing with -bh. There is now a
5608 variant, -bhc, which does actually run the callout code, including
5609 consulting and updating the callout cache.
5611 70. Added support for saslauthd authentication, courtesy of Alexander
5614 71. If statvfs() failed on the spool or log directories while checking their
5615 size for availability, Exim confusingly gave the error "space shortage".
5616 Furthermore, in debugging mode it crashed with a floating point exception.
5617 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5618 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5619 serious problem, Exim now writes to the main and panic logs when this
5620 happens, with details of the failure. It then refuses to accept the
5621 incoming message, giving the message "spool directory problem" or "log
5622 directory problem" with a 421 code for SMTP messages.
5624 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5625 0, 1, and 2 exist, because some OS complain for execs without them (see
5626 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5627 descriptors. However, the code omitted to check that the open succeeded,
5628 causing mysterious errors if for some reason the permissions on /dev/null
5629 got screwed. Now Exim writes a message to the main and panic logs, and
5630 bombs out if it can't open /dev/null.
5632 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5633 interact so that it is all more flexible. It is supposed to remain
5634 backwards compatible. Also added extra_local_interfaces.
5636 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5637 to bomb out with an assertion failure - to the client this appears as a
5638 connection drop. This problem occurs in the part of the code that was taken
5639 from the Samba project. Fortunately, the assertion is in a very simple
5640 function, so I have fixed this by reproducing the function inline in the
5641 one place where it is called, and arranging for authentication to fail
5642 instead of killing the process with assert().
5644 75. The SPA client code was not working when the server requested OEM rather
5645 than Unicode encoding.
5647 76. Added code to make require_files with a specific uid setting more usable in
5648 the case where statting the file as root fails - usually a non-root-mounted
5649 NFS file system. When this happens and the failure is EACCES, Exim now
5650 forks a subprocess and does the per-uid checking as the relevant uid.
5652 77. Added process_log_path.
5654 78. If log_file_path was not explicitly set, a setting of check_log_space or
5655 check_log_inodes was ignored.
5657 79. If a space check for the spool or log partitions fails, the incident is now
5658 logged. Of course, in the latter case the data may get lost...
5660 80. Added the %p formatting code to string_format() so that it can be used to
5661 print addresses in debug_print(). Adjusted all the address printing in the
5662 debugging in store.c to use %p rather than %d.
5664 81. There was a concern that a line of code in smtp_in.c could overflow a
5665 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5666 initially expressed, the concern was not well-founded, because trailing
5667 spaces are removed early. However, if the trailing spaces were followed by
5668 a NULL, they did not get removed, so the overflow was possible. Two fixes
5671 (a) I re-wrote the offending code in a cleaner fashion.
5672 (b) If an incoming SMTP command contains a NULL character, it is rejected
5675 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5676 runs initgroups(), so that if the Exim user is in any additional groups,
5677 they will be used during message reception.
5683 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob