1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
9 PP/02 Make -n do something, by making it not do something.
10 When combined with -bP, the name of an option is not output.
12 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
15 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
16 $sender_host_name and config options to manage this, and basic check
19 PP/05 DSCP support for outbound connections and control modifier for inbound.
21 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
22 (Only plugin which currently uses this is kerberos4, which nobody should
23 be using, but we should make it available and other future plugins might
24 conceivably use it, even though it would break NAT; stuff *should* be
25 using channel bindings instead).
27 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
28 name; added for Sendmail compatibility; requires admin caller.
29 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
30 just ignore it); requires trusted caller.
31 Also parse but ignore: -Ac -Am -X<logfile>
34 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
36 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
38 JH/02 Support "G" suffix to numbers in ${if comparisons.
40 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
42 NM/01 Bugzilla 1197 - Spec typo
43 Bugzilla 1196 - Spec examples corrections
45 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
47 PP/09 Add gnutls_enable_pkcs11 option.
49 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
50 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
52 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
53 "acl {{name}{arg}...}", and optional args on acl condition
56 JH/05 Permit multiple router/transport headers_add/remove lines.
61 PP/01 Handle short writes when writing local log-files.
62 In practice, only affects FreeBSD (8 onwards).
63 Bugzilla 1053, with thanks to Dmitry Isaikin.
65 NM/01 Bugzilla 949 - Documentation tweak
67 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
70 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
72 PP/02 Implemented gsasl authenticator.
74 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
76 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
77 `pkg-config foo` for cflags/libs.
79 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
80 with rest of GSASL and with heimdal_gssapi.
82 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
83 `pkg-config foo` for cflags/libs for the TLS implementation.
85 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
86 properties get this fed in as external SSF. A number of robustness
87 and debugging improvements to the cyrus_sasl authenticator.
89 PP/08 cyrus_sasl server now expands the server_realm option.
91 PP/09 Bugzilla 1214 - Log authentication information in reject log.
92 Patch by Jeremy Harris.
94 PP/10 Added dbmjz lookup type.
96 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
98 PP/12 MAIL args handles TAB as well as SP, for better interop with
99 non-compliant senders.
100 Analysis and variant patch by Todd Lyons.
102 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
103 Bug report from Lars Müller <lars@samba.org> (via SUSE),
104 Patch from Dirk Mueller <dmueller@suse.com>
106 PP/13 tls_peerdn now print-escaped for spool files.
107 Observed some $tls_peerdn in wild which contained \n, which resulted
108 in spool file corruption.
110 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
111 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
112 or write after TLS renegotiation, which otherwise led to messages
115 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
116 as a tracking header (ie: a signed header comes before the signature).
117 Patch from Wolfgang Breyha.
119 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
120 comma-sep list; embedded commas doubled.
122 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
124 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
126 Report and patch from Dmitry Banschikov.
128 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
129 Removed SSL_clear() after SSL_new() which led to protocol negotiation
130 failures. We appear to now support TLS1.1+ with Exim.
132 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
133 lets Exim select keys and certificates based upon TLS SNI from client.
134 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
135 before an outbound SMTP session. New log_selector, +tls_sni.
137 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
138 NULL dereference. Report and patch from Alun Jones.
140 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
141 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
142 Not seeing resolver debug output on NetBSD, but suspect this is a
143 resolver implementation change.
145 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
146 Left warnings. Added "eximon gdb" invocation mode.
148 PP/21 Defaulting "accept_8bitmime" to true, not false.
150 PP/22 Added -bw for inetd wait mode support.
152 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
153 locate the relevant includes and libraries. Made this the default.
155 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
156 Bugzilla 1246, report and most of solution from Tomasz Kusy.
158 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
159 This may cause build issues on older platforms.
161 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
162 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
163 gnutls_require_mac & gnutls_require_protocols (no longer supported).
164 Added SNI support via GnuTLS too.
165 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
167 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
169 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
170 Applied second patch from Janne, implementing suggestion to default
171 multiple-strings-in-record handling to match SPF spec.
173 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
175 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
176 read-only, out of scope).
177 Patch from Wolfgang Breyha, report from Stuart Northfield.
179 PP/29 Fix three issues highlighted by clang analyser static analysis.
180 Only crash-plausible issue would require the Cambridge-specific
181 iplookup router and a misconfiguration.
182 Report from Marcin Mirosław.
184 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
186 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
187 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
188 As part of this, removing so much warning spew let me fix some minor
189 real issues in debug logging.
191 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
192 assignment on my part. Fixed.
194 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
195 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
196 Janne Snabb (who went above and beyond: thank you).
198 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
199 string otherwise requires a connection and a bunch more work and it's
200 relatively easy to get wrong. Should also expose TLS library linkage
203 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
204 64-bit ${eval} (JH/03).
206 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
207 GNU libc to support some of the 64-bit stuff, should not lead to
208 conflicts. Defined before os.h is pulled in, so if a given platform
209 needs to override this, it can.
211 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
212 protection layer was required, which is not implemented.
213 Bugzilla 1254, patch from Wolfgang Breyha.
215 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
216 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
217 tls_dhparam take prime identifiers. Also unbreak combination of
218 OpenSSL+DH_params+TLSSNI.
220 PP/39 Disable SSLv2 by default in OpenSSL support.
226 PP/01 Solaris build fix for Oracle's LDAP libraries.
227 Bugzilla 1109, patch from Stephen Usher.
229 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
231 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
234 TF/02 Fix a couple more cases where we did not log the error message
235 when unlink() failed. See also change 4.74-TF/03.
237 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
238 lock up or crash if it happened to be inside a call to libc when it
239 got a SIGUSR1 from exiwhat.
241 The SIGUSR1 handler appends the current process status to the process
242 log which is later printed by exiwhat. It used to use the general
243 purpose logging code to do this, but several functions it calls are
244 not safe for signals.
246 The new output code in the SIGUSR1 handler is specific to the process
247 log, and simple enough that it's easy to inspect for signal safety.
248 Removing some special cases also simplifies the general logging code.
249 Removing the spurious timestamps from the process log simplifies
252 TF/04 Improved ratelimit ACL condition.
254 The /noupdate option has been deprecated in favour of /readonly which
255 has clearer semantics. The /leaky, /strict, and /readonly update modes
256 are mutually exclusive. The update mode is no longer included in the
257 database key; it just determines when the database is updated. (This
258 means that when you upgrde Exim will forget old rate measurements.)
260 Exim now checks that the per_* options are used with an update mode that
261 makes sense for the current ACL. For example, when Exim is processing a
262 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
263 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
264 must specify per_mail/readonly. If you omit the update mode it defaults to
265 /leaky where that makes sense (as before) or /readonly where required.
267 The /noupdate option is now undocumented but still supported for
268 backwards compatibility. It is equivalent to /readonly except that in
269 ACLs where /readonly is required you may specify /leaky/noupdate or
270 /strict/noupdate which are treated the same as /readonly.
272 A useful new feature is the /count= option. This is a generalization
273 of the per_byte option, so that you can measure the throughput of other
274 aggregate values. For example, the per_byte option is now equivalent
275 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
277 The per_rcpt option has been generalized using the /count= mechanism
278 (though it's more complicated than the per_byte equivalence). When it is
279 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
280 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
281 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
282 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
283 Note that using per_rcpt with a non-readonly update mode in more than
284 one ACL will cause the recipients to be double-counted. (The per_mail
285 and per_byte options don't have this problem.)
287 The handling of very low rates has changed slightly. If the computed rate
288 is less than the event's count (usually one) then this event is the first
289 after a long gap. In this case the rate is set to the same as this event's
290 count, so that the first message of a spam run is counted properly.
292 The major new feature is a mechanism for counting the rate of unique
293 events. The new per_addr option counts the number of different
294 recipients that someone has sent messages to in the last time period. It
295 behaves like per_rcpt if all the recipient addresses are different, but
296 duplicate recipient addresses do not increase the measured rate. Like
297 the /count= option this is a general mechanism, so the per_addr option
298 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
299 example, measure the rate that a client uses different sender addresses
300 with the options per_mail/unique=$sender_address. There are further
301 details in the main documentation.
303 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
305 TF/06 Removed a few PCRE remnants.
307 TF/07 Automatically extract Exim's version number from tags in the git
308 repository when doing development or release builds.
310 PP/02 Raise smtp_cmd_buffer_size to 16kB.
311 Bugzilla 879. Patch from Paul Fisher.
313 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
314 Heavily based on revision 40f9a89a from Simon Arlott's tree.
317 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
319 PP/05 Variable $av_failed, true if the AV scanner deferred.
320 Bugzilla 1078. Patch from John Horne.
322 PP/06 Stop make process more reliably on build failure.
323 Bugzilla 1087. Patch from Heiko Schlittermann.
325 PP/07 Make maildir_use_size_file an _expandable_ boolean.
326 Bugzilla 1089. Patch from Heiko Schlittermann.
328 PP/08 Handle ${run} returning more data than OS pipe buffer size.
329 Bugzilla 1131. Patch from Holger Weiß.
331 PP/09 Handle IPv6 addresses with SPF.
332 Bugzilla 860. Patch from Wolfgang Breyha.
334 PP/10 GnuTLS: support TLS 1.2 & 1.1.
336 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
339 PP/11 match_* no longer expand right-hand-side by default.
340 New compile-time build option, EXPAND_LISTMATCH_RHS.
341 New expansion conditions, "inlist", "inlisti".
343 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
345 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
347 PP/14 fix log_write() format string regression from TF/03.
348 Bugzilla 1152. Patch from Dmitry Isaikin.
354 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
356 PP/02 Harmonised TLS library version reporting; only show if debugging.
357 Layout now matches that introduced for other libraries in 4.74 PP/03.
359 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
361 PP/04 New "dns_use_edns0" global option.
363 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
366 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
367 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
369 TK/01 Updated PolarSSL code to 0.14.2.
370 Bugzilla 1097. Patch from Andreas Metzler.
372 PP/07 Catch divide-by-zero in ${eval:...}.
375 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
378 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
379 format-string attack -- SECURITY: remote arbitrary code execution.
381 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
382 time unintentionally subject to list matching rules, letting the header
383 cause arbitrary Exim lookups (of items which can occur in lists, *not*
384 arbitrary string expansion). This allowed for information disclosure.
386 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
387 INT_MIN/-1 -- value coerced to INT_MAX.
393 NM/01 Workround for PCRE version dependency in version reporting
396 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
397 This fixes portability to compilers other than gcc, notably
398 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
400 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
401 makefiles for portability to HP-UX and POSIX correctness.
403 PP/01 Permit LOOKUP_foo enabling on the make command-line.
404 Also via indented variable definition in the Makefile.
405 (Debugging by Oliver Heesakkers).
407 PP/02 Restore caching of spamd results with expanded spamd_address.
408 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
410 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
411 Improves build reliability. Fix from: Frank Elsner
413 NM/02 Fix wide character breakage in the rfc2047 coding
414 Fixes bug 1064. Patch from Andrey N. Oktyabrski
416 NM/03 Allow underscore in dnslist lookups
417 Fixes bug 1026. Patch from Graeme Fowler
419 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
420 Code patches from Adam Ciarcinski of NetBSD.
422 NM/04 Fixed exiqgrep to cope with mailq missing size issue
425 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
426 is logged, to avoid truncation. Patch from John Horne.
428 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
429 Patch from Jakob Hirsch.
431 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
432 SQL string expansion failure details.
433 Patch from Andrey Oktyabrski.
435 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
436 Patch from Simon Arlott.
438 PP/09 New lookups functionality failed to compile on old gcc which rejects
439 extern declarations in function scope.
440 Patch from Oliver Fleischmann
442 PP/10 Use sig_atomic_t for flags set from signal handlers.
443 Check getgroups() return and improve debugging.
444 Fixed developed for diagnosis in bug 927 (which turned out to be
447 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
448 Patch from Mark Zealey.
450 PP/12 Bugzilla 1056: Improved spamd server selection.
451 Patch from Mark Zealey.
453 PP/13 Bugzilla 1086: Deal with maildir quota file races.
454 Based on patch from Heiko Schlittermann.
456 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
457 Patch from Uwe Doering, sign-off by Michael Haardt.
459 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
460 variable declaration deep within a block. Bug and patch from
463 PP/15 lookups-Makefile IRIX compatibilty coercion.
465 PP/16 Make DISABLE_DKIM build knob functional.
467 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
468 Patch by Simon Arlott
470 TF/03 Fix valgrind.h portability to C89 compilers that do not support
471 variable argument macros. Our copy now differs from upstream.
477 TF/01 Failure to get a lock on a hints database can have serious
478 consequences so log it to the panic log.
480 TF/02 Log LMTP confirmation messages in the same way as SMTP,
481 controlled using the smtp_confirmation log selector.
483 TF/03 Include the error message when we fail to unlink a spool file.
485 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
486 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
487 for maintaining out-of-tree patches for some time.
489 PP/01 Bugzilla 139: Documentation and portability issues.
490 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
491 Handle per-OS dynamic-module compilation flags.
493 PP/02 Let /dev/null have normal permissions.
494 The 4.73 fixes were a little too stringent and complained about the
495 permissions on /dev/null. Exempt it from some checks.
496 Reported by Andreas M. Kirchwitz.
498 PP/03 Report version information for many libraries, including
499 Exim version information for dynamically loaded libraries. Created
500 version.h, now support a version extension string for distributors
501 who patch heavily. Dynamic module ABI change.
503 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
504 privilege escalation vulnerability whereby the Exim run-time user
505 can cause root to append content of the attacker's choosing to
508 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
511 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
512 If dropping privileges for untrusted macros, we disabled normal logging
513 on the basis that it would fail; for the Exim run-time user, this is not
514 the case, and it resulted in successful deliveries going unlogged.
515 Fixed. Reported by Andreas Metzler.
521 PP/01 Date: & Message-Id: revert to normally being appended to a message,
522 only prepend for the Resent-* case. Fixes regression introduced in
523 Exim 4.70 by NM/22 for Bugzilla 607.
525 PP/02 Include check_rfc2047_length in configure.default because we're seeing
526 increasing numbers of administrators be bitten by this.
528 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
530 PP/03 Bugzilla 994: added openssl_options main configuration option.
532 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
534 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
536 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
538 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
539 without a peer certificate, leading to a segfault because of an
540 assumption that peers always have certificates. Be a little more
541 paranoid. Problem reported by Martin Tscholak.
543 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
544 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
545 NB: ClamAV planning to remove STREAM in "middle of 2010".
546 CL also introduces -bmalware, various -d+acl logging additions and
547 more caution in buffer sizes.
549 PP/09 Implemented reverse_ip expansion operator.
551 PP/10 Bugzilla 937: provide a "debug" ACL control.
553 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
555 PP/12 Bugzilla 973: Implement --version.
557 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
559 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
561 PP/15 Bugzilla 816: support multiple condition rules on Routers.
563 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
564 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
565 ignore trailing whitespace.
567 JJ/02 prevent non-panic DKIM error from being sent to paniclog
569 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
572 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
573 Notification from Dr Andrew Aitchison.
575 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
576 ExtendedDetectionInfo response format.
577 Notification from John Horne.
579 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
582 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
583 XSL and documented dependency on system catalogs, with examples of how
586 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
589 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
590 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
591 configuration file which is writeable by the Exim user or group.
593 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
594 of configuration files to cover files specified with the -C option if
595 they are going to be used with root privileges, not just the default
598 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
599 option (effectively making it always true).
601 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
602 files to be used while preserving root privileges.
604 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
605 that rogue child processes cannot use them.
607 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
608 run-time user, instead of root.
610 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
611 Exim run-time user without dropping privileges.
613 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
614 result string, instead of calling string_vformat() twice with the same
617 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
618 for other users. Others should always drop root privileges if they use
619 -C on the command line, even for a whitelisted configure file.
621 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
623 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
629 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
630 $data_path, and $header_path variables; fixed documentation bugs and
633 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
634 exipick to access non-standard spools, including the "frozen" queue
637 NM/01 Bugzilla 965: Support mysql stored procedures.
638 Patch from Alain Williams
640 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
642 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
643 Patch from Andreas Metzler
645 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
646 Patch from Kirill Miazine
648 NM/05 Bugzilla 671: Added umask to procmail example.
650 JJ/03 installed exipick 20100323.0, fixing doc bug
652 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
653 directory. Notification and patch from Dan Rosenberg.
655 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
657 TK/02 Improve log output when DKIM signing operation fails.
659 MH/01 Treat the transport option dkim_domain as a colon separated
660 list, not as a single string, and sign the message with each element,
661 omitting multiple occurences of the same signer.
663 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
664 Bugzilla 985, 986. Patch by Simon Arlott
666 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
667 Patch by Simon Arlott
669 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
670 MBX locking. Notification from Dan Rosenberg.
676 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
678 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
680 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
682 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
684 NM/04 Bugzilla 915: Flag broken perl installation during build.
690 TK/01 Added patch by Johannes Berg that expands the main option
691 "spamd_address" if it starts with a dollar sign.
693 TK/02 Write list of recipients to X-Envelope-Sender header when building
694 the mbox-format spool file for content scanning (suggested by Jakob
697 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
698 (http://www.dcc-servers.net/) support via dccifd. Activated by
699 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
701 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
702 by Mark Daniel Reidel <mr@df.eu>.
704 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
705 When building exim an external PCRE library is now needed -
706 PCRE is a system library on the majority of modern systems.
707 See entry on PCRE_LIBS in EDITME file.
709 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
710 conversation. Added nologin parameter to request.
711 Patch contributed by Kirill Miazine.
713 TF/01 Do not log submission mode rewrites if they do not change the address.
715 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
717 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
718 log files in place. Contributed by Roberto Lima.
720 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
722 TF/03 Bugzilla 615: When checking the local_parts router precondition
723 after a local_part_suffix or local_part_prefix option, Exim now
724 does not use the address's named list lookup cache, since this
725 contains cached lookups for the whole local part.
727 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
728 Robert Millan. Documentation is in experimental-spec.txt.
730 TF/04 Bugzilla 668: Fix parallel build (make -j).
732 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
734 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
735 Patch provided by Jan Srzednicki.
737 TF/05 Leading white space used to be stripped from $spam_report which
738 wrecked the formatting. Now it is preserved.
740 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
741 that they are available at delivery time.
743 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
745 TF/08 TLS error reporting now respects the incoming_interface and
746 incoming_port log selectors.
748 TF/09 Produce a more useful error message if an SMTP transport's hosts
749 setting expands to an empty string.
751 NM/06 Bugzilla 744: EXPN did not work under TLS.
752 Patch provided by Phil Pennock.
754 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
755 Patch provided by Richard Godbee.
757 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
758 acl_smtp_notquit, added index entry.
760 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
761 Patch provided by Eugene Bujak.
763 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
764 accept(). Patch provided by Maxim Dounin.
766 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
767 Patch provided by Phil Pennock.
769 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
771 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
772 Patch provided by Brad "anomie" Jorsch.
774 NM/14 Bugzilla 622: Added timeout setting to transport filter.
775 Patch provided by Dean Brooks.
777 TK/05 Add native DKIM support (does not depend on external libraries).
779 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
780 Patch provided by Graeme Fowler.
782 NM/16 Bugzilla 851: Documentation example syntax fix.
784 NM/17 Changed NOTICE file to remove references to embedded PCRE.
786 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
789 NM/19 Bugzilla 745: TLS version reporting.
790 Patch provided by Phil Pennock.
792 NM/20 Bugzilla 167: bool: condition support.
793 Patch provided by Phil Pennock.
795 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
796 clients. Patch provided by Phil Pennock.
798 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
799 Patch provided by Brad "anomie" Jorsch.
801 NM/23 Bugzilla 687: Fix misparses in eximstats.
802 Patch provided by Heiko Schlittermann.
804 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
805 Patch provided by Heiko Schlittermann.
807 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
808 plus update to original patch.
810 NM/26 Bugzilla 799: Documentation correction for ratelimit.
812 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
813 Patch provided by David Brownlee.
815 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
817 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
819 NM/30 Bugzilla 888: TLS documentation bugfixes.
821 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
823 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
824 Unlike the original bugzilla I have changed all shell scripts in src tree.
826 NM/33 Bugzilla 898: Transport filter timeout fix.
827 Patch by Todd Rinaldo.
829 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
830 Patch by Serge Demonchaux.
832 NM/35 Bugzilla 39: Base64 decode bug fixes.
833 Patch by Jakob Hirsch.
835 NM/36 Bugzilla 909: Correct connect() call in dcc code.
837 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
839 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
841 NM/39 Bugzilla 911: Fixed MakeLinks build script.
847 TK/01 Add preliminary DKIM support. Currently requires a forked version of
848 ALT-N's libdkim that I have put here:
849 http://duncanthrax.net/exim-experimental/
851 Note to Michael Haardt: I had to rename some vars in sieve.c. They
852 were called 'true' and it seems that C99 defines that as a reserved
853 keyword to be used with 'bool' variable types. That means you could
854 not include C99-style headers which use bools without triggering
855 build errors in sieve.c.
857 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
858 as mailq or other aliases. Changed the --help handling significantly
859 to do whats expected. exim_usage() emits usage/help information.
861 SC/01 Added the -bylocaldomain option to eximstats.
863 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
865 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
867 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
873 PH/01 Another patch from the Sieve maintainer.
875 PH/02 When an IPv6 address is converted to a string for single-key lookup
876 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
877 dots are used instead of colons so that keys in lsearch files need not
878 contain colons. This was done some time before quoting was made available
879 in lsearch files. However, iplsearch files do require colons in IPv6 keys
880 (notated using the quote facility) so as to distinguish them from IPv4
881 keys. This meant that lookups for IP addresses in host lists did not work
882 for iplsearch lookups.
884 This has been fixed by arranging for IPv6 addresses to be expressed with
885 colons if the lookup type is iplsearch. This is not incompatible, because
886 previously such lookups could never work.
888 The situation is now rather anomolous, since one *can* have colons in
889 ordinary lsearch keys. However, making the change in all cases is
890 incompatible and would probably break a number of configurations.
892 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
895 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
896 conversion specification without a maximum field width, thereby enabling
897 a rogue spamd server to cause a buffer overflow. While nobody in their
898 right mind would setup Exim to query an untrusted spamd server, an
899 attacker that gains access to a server running spamd could potentially
900 exploit this vulnerability to run arbitrary code as the Exim user.
902 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
903 $primary_hostname instead of what libspf2 thinks the hosts name is.
905 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
906 a directory entry by the name of the lookup key. Previously, if a
907 symlink pointed to a non-existing file or a file in a directory that
908 Exim lacked permissions to read, a lookup for a key matching that
909 symlink would fail. Now it is enough that a matching directory entry
910 exists, symlink or not. (Bugzilla 503.)
912 PH/03 The body_linecount and body_zerocount variables are now exported in the
915 PH/04 Added the $dnslist_matched variable.
917 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
918 This means they are set thereafter only if the connection becomes
921 PH/06 Added the client_condition to authenticators so that some can be skipped
922 by clients under certain conditions.
924 PH/07 The error message for a badly-placed control=no_multiline_responses left
925 "_responses" off the end of the name.
927 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
929 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
930 (without spaces) instead of just copying the configuration text.
932 PH/10 Added the /noupdate option to the ratelimit ACL condition.
934 PH/11 Added $max_received_linelength.
936 PH/12 Added +ignore_defer and +include_defer to host lists.
938 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
939 way in which PCRE > 7.0 is built.
941 PH/14 Implemented queue_only_load_latch.
943 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
944 MAIL command. The effect was to mangle the value on 64-bit systems.
946 PH/16 Another patch from the Sieve maintainer.
948 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
950 PH/18 If a system quota error occurred while trying to create the file for
951 a maildir delivery, the message "Mailbox is full" was not appended to the
952 bounce if the delivery eventually timed out. Change 4.67/27 below applied
953 only to a quota excession during the actual writing of the file.
955 PH/19 It seems that peer DN values may contain newlines (and other non-printing
956 characters?) which causes problems in log lines. The DN values are now
957 passed through string_printing() before being added to log lines.
959 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
960 and InterBase are left for another time.)
962 PH/21 Added message_body_newlines option.
964 PH/22 Guard against possible overflow in moan_check_errorcopy().
966 PH/23 POSIX allows open() to be a macro; guard against that.
968 PH/24 If the recipient of an error message contained an @ in the local part
969 (suitably quoted, of course), incorrect values were put in $domain and
970 $local_part during the evaluation of errors_copy.
976 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
977 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
980 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
981 issue a MAIL command.
983 PH/02 In an ACL statement such as
985 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
987 if a client was not listed at all, or was listed with a value other than
988 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
989 the condition was not true (as it should be), so access was not denied.
990 The bug was that the ! inversion was incorrectly passed on to the second
991 item. This has been fixed.
993 PH/03 Added additional dnslists conditions == and =& which are different from
994 = and & when the dns lookup returns more than one IP address.
996 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
997 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
999 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1000 FSYNC, which compiles an option called disable_fsync that allows for
1001 bypassing fsync(). The documentation is heavily laced with warnings.
1003 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1005 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1006 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1007 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1008 including adding "make clean"; (3) Added -fPIC when compiling the test
1009 dynamically loaded module, to get rid of a warning.
1011 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1012 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1013 = 0s. The bug is otherwise harmless.
1015 PH/07 There was a bug in the dovecot authenticator such that the value of
1016 $auth1 could be overwritten, and so not correctly preserved, after a
1017 successful authentication. This usually meant that the value preserved by
1018 the server_setid option was incorrect.
1020 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1022 PH/09 Installed PCRE release 7.0.
1024 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1025 run for batched SMTP input. It is now run at the start of every message
1026 in the batch. While fixing this I discovered that the process information
1027 (output by running exiwhat) was not always getting set for -bs and -bS
1028 input. This is fixed, and it now also says "batched" for BSMTP.
1030 PH/11 Added control=no_pipelining.
1032 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1033 patch, slightly modified), and move the expansion of helo_data till after
1034 the connection is made in the smtp transport (so it can use these
1037 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1039 PH/14 Added log_selector = +pid.
1041 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1043 PH/16 Add ${if forany and ${if forall.
1045 PH/17 Added dsn_from option to vary the From: line in DSNs.
1047 PH/18 Flush SMTP output before performing a callout, unless control =
1048 no_callout_flush is set.
1050 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1051 was true (the default) a successful delivery failed to delete the retry
1052 item, thus causing premature timeout of the address. The bug is now
1055 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1057 PH/21 Long custom messages for fakedefer and fakereject are now split up
1058 into multiline reponses in the same way that messages for "deny" and
1059 other ACL rejections are.
1061 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1062 with slight modification.
1064 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1065 draft, changing the syntax and factoring some duplicate code".
1067 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1068 for deliveries of the second and subsequent messages over the same SMTP
1071 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1072 ${reduce, with only minor "tidies".
1074 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1076 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1077 expansion side effects.
1079 PH/27 When a message times out after an over-quota error from an Exim-imposed
1080 quota, the bounce message says "mailbox is full". This message was not
1081 being given when it was a system quota that was exceeded. It now should
1084 MH/03 Made $recipients available in local_scan(). local_scan() already has
1085 better access to the recipient list through recipients_list[], but
1086 $recipients can be useful in postmaster-provided expansion strings.
1088 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1089 in the case of a MAIL command with additional options following the
1090 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1091 were accidentally chopped off.
1093 PH/29 SMTP synchronization checks are implemented when a command is read -
1094 there is a check that no more input is waiting when there shouldn't be
1095 any. However, for some commands, a delay in an ACL can mean that it is
1096 some time before the response is written. In this time, more input might
1097 arrive, invalidly. So now there are extra checks after an ACL has run for
1098 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1099 pipelining has not been advertised.
1101 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1103 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1104 returned in the SMTP response when smtp_return_error_details was false.
1105 This has been fixed.
1107 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1108 instead of the C I/O that was originally supplied, because problems were
1109 reported on Solaris.
1111 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1112 Exim which did not show up earlier: it was assuming that a call to
1113 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1114 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1115 was a macro that became an assignment, so it seemed to work. This has
1116 changed to a proper function call with a void return, hence the compile
1117 error. Exim's code has been fixed.
1119 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1122 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1124 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1126 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1127 because it turns out to be too big or there is a timeout) there is no
1128 "Completed" line in the log. When some messages of this type were
1129 selected by exigrep, they were listed as "not completed". Others were
1130 picked up by some special patterns. I have improved the selection
1131 criteria to be more general.
1133 PH/38 The host_find_failed option in the manualroute router can now be set
1134 to "ignore", to completely ignore a host whose IP address cannot be
1135 found. If all hosts are ignored, the behaviour is controlled by the new
1136 host_all_ignored option.
1138 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1139 homing or because of multiple MX records with /mx) generated more than
1140 one IP address, and the following item turned out to be the local host,
1141 all the secondary addresses of the first item were incorrectly removed
1142 from the list, along with the local host and any following hosts (which
1143 is what is supposed to happen).
1145 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1146 whoever called Exim into the -H file. In the case of the daemon it was
1147 behaving confusingly. When first started, it used values for whoever
1148 started the daemon, but after a SIGHUP it used the Exim user (because it
1149 calls itself on a restart). I have changed the code so that it now always
1152 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1153 message are rejected with the same error (e.g. no authentication or bad
1154 sender address), and a DATA command is nevertheless sent (as can happen
1155 with PIPELINING or a stupid MUA), the error message that was given to the
1156 RCPT commands is included in the rejection of the DATA command. This is
1157 intended to be helpful for MUAs that show only the final error to their
1160 PH/42 Another patch from the Sieve maintainer.
1162 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1163 Eximstats - Fixed some broken HTML links and added missing column headers
1165 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1166 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1168 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1170 PH/43 Yet another patch from the Sieve maintainer.
1172 PH/44 I found a way to check for a TCP/IP connection going away before sending
1173 the response to the final '.' that terminates a message, but only in the
1174 case where the client has not sent further data following the '.'
1175 (unfortunately, this is allowed). However, in many cases there won't be
1176 any further data because there won't be any more messages to send. A call
1177 to select() can be used: if it shows that the input is "ready", there is
1178 either input waiting, or the socket has been closed. An attempt to read
1179 the next input character can distinguish the two cases. Previously, Exim
1180 would have sent an OK response which the client would never have see.
1181 This could lead to message repetition. This fix should cure that, at
1182 least in a lot of common cases.
1184 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1185 advertised in response to EHLO.
1191 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1192 fixed by 4.65/MH/01 (is this a record?) are fixed:
1194 (i) An empty string was always treated as zero by the numeric comparison
1195 operators. This behaviour has been restored.
1197 (ii) It is documented that the numeric comparison operators always treat
1198 their arguments as decimal numbers. This was broken in that numbers
1199 starting with 0 were being interpreted as octal.
1201 While fixing these problems I realized that there was another issue that
1202 hadn't been noticed. Values of message_size_limit (both the global option
1203 and the transport option) were treated as octal if they started with 0.
1204 The documentation was vague. These values are now always treated as
1205 decimal, and I will make that clear in the documentation.
1211 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1212 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1215 MH/01 Don't check that the operands of numeric comparison operators are
1216 integers when their expansion is in "skipping" mode (fixes bug
1217 introduced by 4.64-PH/07).
1219 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1220 child addresses, Exim now panics and dies. Previously, because the count
1221 is held in a short int, deliveries were likely to be lost. As such a
1222 large number of recipients for a single message is ridiculous
1223 (performance will be very, very poor), I have chosen to impose a limit
1224 rather than extend the field.
1230 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1231 leftover -K file (the existence of which was triggered by #402).
1232 While we were at it, introduced process PID as part of the -K
1233 filename. This should rule out race conditions when creating
1236 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1237 processing considerably. Previous code took too long for large mails,
1238 triggering a timeout which in turn triggers #401.
1240 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1241 in the DK code in transports.c. sendfile() is not really portable,
1242 hence the _LINUX specificness.
1244 TF/01 In the add_headers option to the mail command in an Exim filter,
1245 there was a bug that Exim would claim a syntax error in any
1246 header after the first one which had an odd number of characters
1249 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1250 callout verification, Exim cached a "reject" for the entire domain. This
1251 is correct for most verifications, but it is not correct for a recipient
1252 verification with use_sender or use_postmaster set, because in that case
1253 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1254 case of MAIL FROM:<> rejection from other early rejections (e.g.
1255 rejection of HELO). When verifying a recipient using a non-null MAIL
1256 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1257 Whatever the result of the callout, the value of the domain cache is
1258 left unchanged (for any other kind of callout, getting as far as trying
1259 RCPT means that the domain itself is ok).
1261 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1264 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1265 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1266 session, the daemon ignores ECONNECT errors and logs others; it now
1267 ignores EPIPE as well.
1269 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1270 (quoted-printable decoding).
1272 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1273 later the small subsequent patch to fix an introduced bug.
1275 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1277 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1279 PH/08 An error is now given if message_size_limit is specified negative.
1281 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1282 to be given (somewhat) arbitrary names.
1284 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1287 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1288 miscellaneous code fixes
1290 PH/10 Added the log_reject_target ACL modifier to specify where to log
1293 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1294 hostname. This is wrong, because it relates to the incoming message (and
1295 probably the interface on which it is arriving) and not to the outgoing
1296 callout (which could be using a different interface). This has been
1297 changed to use the value of the helo_data option from the smtp transport
1298 instead - this is what is used when a message is actually being sent. If
1299 there is no remote transport (possible with a router that sets up host
1300 addresses), $smtp_active_hostname is used.
1302 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1303 tweaks were necessary in order to get it to work (see also 21 below):
1304 (a) The code assumed that strncpy() returns a negative number on buffer
1305 overflow, which isn't the case. Replaced with Exim's string_format()
1307 (b) There were several signed/unsigned issues. I just did the minimum
1308 hacking in of casts. There is scope for a larger refactoring.
1309 (c) The code used strcasecmp() which is not a standard C function.
1310 Replaced with Exim's strcmpic() function.
1311 (d) The code set only $1; it now sets $auth1 as well.
1312 (e) A simple test gave the error "authentication client didn't specify
1313 service in request". It would seem that Dovecot has changed its
1314 interface. Fortunately there's a specification; I followed it and
1315 changed what the client sends and it appears to be working now.
1317 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1320 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1321 address A is aliased to B and C, where B exists and C does not. Without
1322 -v the output is "A verified" because verification stops after a
1323 successful redirection if more than one address is generated. However,
1324 with -v the child addresses are also verified. Exim was outputting "A
1325 failed to verify" and then showing the successful verification for C,
1326 with its parentage. It now outputs "B failed to verify", showing B's
1327 parentage before showing the successful verification of C.
1329 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1330 look up a TXT record in a specific list after matching in a combined
1333 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1334 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1335 they consult the DNS. I had assumed they would set it the way they
1336 wanted; and indeed my experiments on Linux seem to show that in some
1337 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1338 To be on the safe side, however, I have now made the interface to
1339 host_find_byname() similar to host_find_bydns(), with an argument
1340 containing the DNS resolver options. The host_find_byname() function now
1341 sets these options at its start, just as host_find_bydns() does. The smtp
1342 transport options dns_qualify_single and dns_search_parents are passed to
1343 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1344 of host_find_byname() use the default settings of RES_DEFNAMES
1345 (qualify_single) but not RES_DNSRCH (search_parents).
1347 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1348 spool_read_header() do less string testing, by means of a preliminary
1349 switch on the second character of optional "-foo" lines. (This is
1350 overdue, caused by the large number of possibilities that now exist.
1351 Originally there were few.) While I was there, I also converted the
1352 str(n)cmp tests so they don't re-test the leading "-" and the first
1353 character, in the hope this might squeeze out yet more improvement.
1355 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1356 flag allowing group syntax was set by the header_syntax check but not
1357 turned off, possible causing trouble later; (2) The flag was not being
1358 set at all for the header_verify test, causing "group"-style headers to
1359 be rejected. I have now set it in this case, and also caused header_
1360 verify to ignore an empty address taken from a group. While doing this, I
1361 came across some other cases where the code for allowing group syntax
1362 while scanning a header line wasn't quite right (mostly, not resetting
1363 the flag correctly in the right place). These bugs could have caused
1364 trouble for malformed header lines. I hope it is now all correct.
1366 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1367 with the "reply" argument non-NULL. The code, however (which originally
1368 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1369 but it didn't always do it. This confused somebody who was copying the
1370 code for some other use. I have removed all the tests.
1372 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1373 feature that was used to support insecure browsers during the U.S. crypto
1374 embargo. It requires special client support, and Exim is probably the
1375 only MTA that supported it -- and would never use it because real RSA is
1376 always available. This code has been removed, because it had the bad
1377 effect of slowing Exim down by computing (never used) parameters for the
1378 RSA_EXPORT functionality.
1380 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1381 authenticator to fail if there's a tab character in the incoming data
1382 (there should never be unless someone is messing about, as it's supposed
1383 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1384 if the connection is using TLS or if the remote IP is the same as the
1385 local IP, and the "valid-client-cert option" if a client certificate has
1388 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1389 authenticators. This can be used for authorization after authentication
1390 succeeds. (In the case of plaintext, it servers for both authentication
1393 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1394 if any retry times were supplied.
1396 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1397 connection, where there is no client IP address to check. In this
1398 situation, the verify now always succeeds.
1400 PH/25 Applied John Jetmore's -Mset patch.
1402 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1404 PH/27 In a string expansion for a processed (not raw) header when multiple
1405 headers of the same name were present, leading whitespace was being
1406 removed from all of them, but trailing whitespace was being removed only
1407 from the last one. Now trailing whitespace is removed from each header
1408 before concatenation. Completely empty headers in a concatenation (as
1409 before) are ignored.
1411 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1412 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1414 PH/29 [Removed. This was a change that I later backed out, and forgot to
1415 correct the ChangeLog entry (that I had efficiently created) before
1416 committing the later change.]
1418 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1419 address errors (4xx response to RCPT) over the same connection as other
1420 messages routed to the same hosts. Such deliveries are always "forced",
1421 so retry times are not inspected. This resulted in far too many retries
1422 for the affected addresses. The effect occurred only when there were more
1423 hosts than the hosts_max_try setting in the smtp transport when it had
1424 the 4xx errors. Those hosts that it had tried were not added to the list
1425 of hosts for which the message was waiting, so if all were tried, there
1426 was no problem. Two fixes have been applied:
1428 (i) If there are any address or message errors in an SMTP delivery, none
1429 of the hosts (tried or untried) are now added to the list of hosts
1430 for which the message is waiting, so the message should not be a
1431 candidate for sending over the same connection that was used for a
1432 successful delivery of some other message. This seems entirely
1433 reasonable: after all the message is NOT "waiting for some host".
1434 This is so "obvious" that I'm not sure why it wasn't done
1435 previously. Hope I haven't missed anything, but it can't do any
1436 harm, as the worst effect is to miss an optimization.
1438 (ii) If, despite (i), such a delivery is accidentally attempted, the
1439 routing retry time is respected, so at least it doesn't keep
1440 hammering the server.
1442 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1443 in ${readsocket because some servers need this prod.
1445 PH/32 Added some extra debug output when updating a wait-xxx database.
1447 PH/33 The hint "could be header name not terminated by colon", which has been
1448 given for certain expansion errors for a long time, was not being given
1449 for the ${if def:h_colon_omitted{... case.
1451 PH/34 The spec says: "With one important exception, whenever a domain list is
1452 being scanned, $domain contains the subject domain." There was at least
1453 one case where this was not true.
1455 PH/35 The error "getsockname() failed: connection reset by peer" was being
1456 written to the panic log as well as the main log, but it isn't really
1457 panic-worthy as it just means the connection died rather early on. I have
1458 removed the panic log writing for the ECONNRESET error when getsockname()
1461 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1462 runs only) independently of the message's sender address. This meant
1463 that, if the 4xx error was in fact related to the sender, a different
1464 message to the same recipient with a different sender could confuse
1465 things. In particualar, this can happen when sending to a greylisting
1466 server, but other circumstances could also provoke similar problems.
1467 I have changed the default so that the retry time for these errors is now
1468 based a combination of the sender and recipient addresses. This change
1469 can be overridden by setting address_retry_include_sender=false in the
1472 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1473 remote server are returned as part of bounce messages. This was not
1474 happening for LMTP over a pipe (the lmtp transport), but now it is the
1475 same for both kinds of LMTP.
1477 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1478 in header lines that were in fact CNAMEs. This is no longer the case.
1480 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1481 and queue runs started by the daemon processed all messages. This has
1482 been fixed so that -R and -S can now usefully be given with -q<time>.
1484 PH/40 Import PCRE release 6.7 (fixes some bugs).
1486 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1488 PH/42 Give an error if -q is specified more than once.
1490 PH/43 Renamed the variables $interface_address and $interface_port as
1491 $received_ip_address and $received_port, to make it clear that these
1492 values apply to message reception, and not to the outgoing interface when
1493 a message is delivered. (The old names remain recognized, of course.)
1495 PH/44 There was no timeout on the connect() call when using a Unix domain
1496 socket in the ${readsocket expansion. There now is.
1498 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1499 be meaningful with "accept".
1501 SC/01 Eximstats V1.43
1502 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1504 SC/02 Eximstats V1.44
1505 Use a glob alias rather than an array ref in the generated
1506 parser. This improves both readability and performance.
1508 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1509 Collect SpamAssassin and rejection statistics.
1510 Don't display local sender or destination tables unless
1511 there is data to show.
1512 Added average volumes into the top table text output.
1514 SC/04 Eximstats V1.46
1515 Collect data on the number of addresses (recipients)
1516 as well as the number of messages.
1518 SC/05 Eximstats V1.47
1519 Added 'Message too big' to the list of mail rejection
1520 reasons (thanks to Marco Gaiarin).
1522 SC/06 Eximstats V1.48
1523 Mainlog lines which have GMT offsets and are too short to
1524 have a flag are now skipped.
1526 SC/07 Eximstats V1.49 (Alain Williams)
1527 Added the -emptyok flag.
1529 SC/08 Eximstats V1.50
1530 Fixes for obtaining the IP address from reject messages.
1532 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1533 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1534 whitesspace changes from 4.64-PH/27
1536 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1539 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1540 are found, allow negative numbers in numeric criteria)
1542 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1544 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1545 to match changes made in 4.64-PH/43
1547 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1549 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1550 "domain" is actually an IP address, and force a failure. This locks out
1551 those revolvers/nameservers that support "A-for-A" lookups, in
1552 contravention of the specifications.
1554 PH/48 When a host name was looked up from an IP address, and the subsequent
1555 forward lookup of the name timed out, the host name was left in
1556 $sender_host_name, contrary to the specification.
1558 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1559 restricted to single-key lookups, Exim was not diagnosing an error if
1560 * or *@ was used with a query-style lookup.
1562 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1564 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1565 long ago, but noone interested enough thought of it. Let's just say that
1566 the "1.1" means that there are some new functions that weren't there at
1567 some point in the past.
1569 PH/51 Error processing for expansion failure of helo_data from an smtp
1570 transport during callout processing was broken.
1572 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1573 tested/used via the -bh/-bhc/-bs options.
1575 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1576 bug, fixed in subsequent PCRE releases).
1578 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1579 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1581 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1587 SC/01 Use a glob alias rather than an array ref in eximstats generated
1588 parser. This improves both readability and performance.
1590 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1591 Don't display local sender or destination tables in eximstats unless
1592 there is data to show.
1593 Added average volumes into the eximstats top table text output.
1595 SC/03 Collect data on the number of addresses (recipients) as well
1596 as the number of messages in eximstats.
1598 TF/01 Correct an error in the documentation for the redirect router. Exim
1599 does (usually) call initgroups() when daemonizing.
1601 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1602 with consistent privilege compared to when running as a daemon.
1604 TF/03 Note in the spec that $authenticated_id is not set for local
1605 submissions from trusted users.
1607 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1608 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1610 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1611 by adding some example configuration directives to the default
1612 configuration file. A little bit of work is required to uncomment the
1613 directives and define how usernames and passwords are checked, but
1614 there is now a framework to start from.
1616 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1617 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1618 without this. I don't know how relevant this is to other LDAP libraries.
1620 PH/02 Add the verb name to the "unknown ACL verb" error.
1622 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1624 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1626 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1627 directory not expanded when it should be if an expanded home directory
1628 was set for the address (which is overridden by the transport).
1630 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1633 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1634 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1635 because it is too late at that time, and has no effect.
1637 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1638 security issue with \' (bugzilla #107). I could not use the
1639 PQescapeStringConn() function, because it needs a PGconn value as one of
1642 PH/08 When testing addresses using -bt, indicate those final addresses that
1643 are duplicates that would not cause an additional delivery. At least one
1644 person was confused, thinking that -bt output corresponded to deliveries.
1645 (Suppressing duplicates isn't a good idea as you lose the information
1646 about possibly different redirections that led to the duplicates.)
1648 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1649 systems where poll() doesn't work, in particular OS X.
1651 PH/10 Added more information to debugging output for retry time not reached.
1653 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1654 operations in malware.c.
1656 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1659 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1660 syslog_duplication set false, log lines that would normally be written
1661 both the the main log and to the reject log were not written to syslog at
1664 PH/14 In the default configuration, change the use of "message" in ACL warn
1665 statements to "add_header".
1667 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1668 not followed by a command (e.g. "seen endif").
1670 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1671 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1674 PH/17 Added extra conditions to the default value of delay_warning_condition
1678 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1679 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1680 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1683 The Auto-Submitted: and various List- headers are standardised, whereas I
1684 don't think Precedence: ever was.
1686 PH/18 Refactored debugging code in route_finduser() to show more information,
1687 in particular, the error code if getpwnam() issues one.
1689 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1690 This is apparently needed in addition to the PH/07 change above to avoid
1691 any possible encoding problems.
1693 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1694 but not after initializing Perl.
1696 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1697 output them only if debugging. By default they are written stderr,
1698 apparently, which is not desirable.
1700 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1703 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1706 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1708 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1709 authenticated or an ident call has been made. Suppress the default
1710 values for $authenticated_id and $authenticated_sender (but permit -oMai
1711 and -oMas) when testing with -bh.
1713 PH/24 Re-jigged the order of the tests in the default configuration so that the
1714 tests for valid domains and recipients precede the DNS black list and CSA
1715 tests, on the grounds that those ones are more expensive.
1717 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1718 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1719 This bug exists in every version of Exim that I still have, right back to
1722 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1723 However, an attempt to turn on case-sensitivity in a regex key by
1724 including (?-i) didn't work because the subject string was already
1725 lowercased, and the effects were non-intuitive. It turns out that a
1726 one-line patch can be used to allow (?-i) to work as expected.
1732 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1733 other effects) broke the use of negated acl sub-conditions.
1735 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1738 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1739 "Deny" causes Exim to reject the incoming connection with a 554 error.
1740 Unfortunately, if there is a major crisis, such as a disk failure,
1741 tcp-wrappers gives "deny", whereas what one would like would be some
1742 kind of temporary error. A kludge has been added to help with this.
1743 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1744 554 error is used if errno is still zero or contains ENOENT (which occurs
1745 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1748 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1750 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1751 errors. Otherwise a message that provokes a temporary error (when other
1752 messages do not) can cause a whole host to time out.
1754 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1755 addresses were routed directly to files or pipes from a redirect router.
1756 File deliveries just didn't batch; pipe deliveries might have suffered
1759 PH/06 A failure to get a lock for a hints database would erroneously always say
1760 "Failed to get write lock", even when it was really a read lock.
1762 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1763 of 0600. This has been changed to use the value of the lockfile_mode
1764 option (which defaults to 0600).
1766 PH/08 Applied small patch from the Sieve maintainer.
1768 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1769 folder from quota calculations, a direct delivery into this folder messed
1770 up the contents of the maildirsize file. This was because the regex was
1771 used only to exclude .Trash (or whatever) when the size of the mailbox
1772 was calculated. There was no check that a delivery was happening into an
1773 excluded directory. This bug has been fixed by ignoring all quota
1774 processing for deliveries into excluded directories.
1776 PH/10 Added the maildirfolder_create_regex option to appendfile.
1782 PH/01 The code for finding all the local interface addresses on a FreeBSD
1783 system running IPv6 was broken. This may well have applied to all BSD
1784 systems, as well as to others that have similar system calls. The broken
1785 code found IPv4 interfaces correctly, but gave incorrect values for the
1786 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1787 that it would not match correctly against @[] and not recognize the IPv6
1790 PH/02 The ipliteral router was not recognizing addresses of the form user@
1791 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1793 PH/03 Added disable_ipv6.
1795 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1796 decoded form, because it is most often used to construct To: headers
1797 lines in autoreplies, and the decoded form may well be syntactically
1798 invalid. However, $reply_address has leading white space removed, and all
1799 newlines turned into spaces so that the autoreply transport does not
1802 PH/05 If group was specified without a user on a router, and no group or user
1803 was specified on a transport, the group from the router was ignored.
1805 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1806 for visible compile-time settings that can be used to change these
1807 numbers, for those that want even more. Backwards compatibility with old
1808 spool files has been maintained. However, going back to a previous Exim
1809 release will lost any variables that are in spool files.
1811 PH/07 Two small changes when running in the test harness: increase delay when
1812 passing a TCP/IP connection to a new process, in case the original
1813 process has to generate a bounce, and remove special handling of
1814 127.0.0.2 (sic), which is no longer necessary.
1816 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1817 be the same on different OS.
1819 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1822 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1823 whether --show-vars was specified or not
1825 JJ/02 exipick: Added support for new ACL variable spool format introduced
1828 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1829 syntactically invalid From: or Reply-to: line, and a filter used this to
1830 generate an autoreply, and therefore failed to obtain an address for the
1831 autoreply, Exim could try to deliver to a non-existent relative file
1832 name, causing unrelated and misleading errors. What now happens is that
1833 it logs this as a hard delivery error, but does not attempt to create a
1836 PH/11 The exinext utility has a -C option for testing purposes, but although
1837 the given file was scanned by exinext itself; it wasn't being passed on
1838 when Exim was called.
1840 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1841 an end-of-file indication when reading a command response.
1843 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1844 compiled. In many other places in Exim, IPv6 addresses are always
1845 recognized, so I have changed this. It also means that IPv4 domain
1846 literals of the form [IPV4:n.n.n.n] are now always recognized.
1848 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1849 used if the router is not running as root, for example, when verifying at
1850 ACL time, or when using -bh. The debugging output from this situation was
1851 non-existent - all you got was a failure to exec. I have made two
1854 (a) Failures to set uid/gid, the current directory, or a process leader
1855 in a subprocess such as that created by queryprogram now generate
1856 suitable debugging ouput when -d is set.
1858 (b) The queryprogram router detects when it is not running as root,
1859 outputs suitable debugging information if -d is set, and then runs
1860 the subprocess without attempting to change uid/gid.
1862 PH/15 Minor change to Makefile for building test_host (undocumented testing
1865 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1866 additional section of a DNS packet that returns MX or SRV records.
1867 Instead, it always explicitly searches for A/AAAA records. This avoids
1868 major problems that occur when a DNS server includes only records of one
1869 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1870 fixed another bug: if SRV records were looked up and the corresponding
1871 address records were *not* found in the additional section, the port
1872 values from the SRV records were lost.
1874 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1875 using the correct key (the original address) when searching the retry
1876 rules in order to find which one to use for generating the retry hint.
1878 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1879 adding the default one. Similarly, if it contains a Reply-To: header, the
1880 errors_reply_to option, if set, is not used.
1882 PH/19 When calculating a retry time, Exim used to measure the "time since
1883 failure" by looking at the "first failed" field in the retry record. Now
1884 it does not use this if it is later than than the arrival time of the
1885 message. Instead it uses the arrival time. This makes for better
1886 behaviour in cases where some deliveries succeed, thus re-setting the
1887 "first failed" field. An example is a quota failure for a huge message
1888 when small messages continue to be delivered. Without this change, the
1889 "time since failure" will always be short, possible causing more frequent
1890 delivery attempts for the huge message than are intended.
1891 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1893 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1894 $1, $2, $3) because the numerical variables can be reset during some
1895 expansion items (e.g. "match"), thereby losing the authentication data.
1897 PH/21 Make -bV show the size of off_t variables so that the test suite can
1898 decide whether to run tests for quotas > 2G.
1900 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1901 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1902 filecount value is greater than 2G or if a quota value is greater than 2G
1903 on a system where the size of off_t is not greater than 4, a panic error
1906 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1907 never match. The debug and -bh output now contains an explicit error
1908 message indicating a malformed IPv4 address or mask.
1910 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1911 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1912 PH/23 above applies.
1914 PH/25 Do not write to syslog when running in the test harness. The only
1915 occasion when this arises is a failure to open the main or panic logs
1916 (for which there is an explicit test).
1918 PH/26 Added the /no_tell option to "control=freeze".
1920 PH/27 If a host name lookup failed very early in a connection, for example, if
1921 the IP address matched host_lookup and the reverse lookup yielded a name
1922 that did not have a forward lookup, an error message of the form "no IP
1923 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1924 could be logged. Now it outputs the IP address instead of "NULL".
1926 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1927 allows the sender and the authenticated sender to be set when
1928 submitting a message from within Exim. Since child_open_exim() is
1929 documented for local_scan(), the new function should be too.
1931 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1932 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1933 results in an empty string is now treated as unset.
1935 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1937 PH/31 Added sender_verify_fail logging option.
1939 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1940 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1941 tidied the source and removed it altogether.
1943 PH/33 When a queue run was abandoned because the load average was too high, a
1944 log line was always written; now it is written only if the queue_run log
1945 selector is set. In addition, the log line for abandonment now contains
1946 information about the queue run such as the pid. This is always present
1947 in "start" and "stop" lines but was omitted from the "abandon" line.
1949 PH/34 Omit spaces between a header name and the colon in the error message that
1950 is given when verify = headers_syntax fails (if there are lots of them,
1951 the message gets confusing).
1953 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1954 names, as there are now some PTR records that contain slashes. This check
1955 is only to protect against broken name servers that fall over on strange
1956 characters, so the fact that it applies to all lookups doesn't matter.
1958 PH/36 Now that the new test suite is complete, we can remove some of the
1959 special code in Exim that was needed for the old test suite. For example,
1960 sorting DNS records because real resolvers return them in an arbitrary
1961 order. The new test suite's fake resolver always returns records in the
1964 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1965 bounces) except when queue_only is set, to avoid logging races between
1966 the different processes.
1968 PH/38 Panic-die if .include specifies a non-absolute path.
1970 PH/39 A tweak to the "H" retry rule from its user.
1972 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1973 a label. They prevented compilation on older perls.
1975 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1976 a warning to be raised on newish perls.
1978 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1979 on queue. Changes to match documented behaviour of showing count of
1980 messages matching specified criteria.
1982 PH/40 Changed the default ident timeout from 30s to 5s.
1984 PH/41 Added support for the use of login_cap features, on those BSD systems
1985 that have them, for controlling the resources used by pipe deliveries.
1987 PH/42 The content-scanning code uses fopen() to create files in which to put
1988 message data. Previously it was not paying any attention to the mode of
1989 the files. Exim runs with umask(0) because the rest of the code creates
1990 files with open(), and sets the required mode explicitly. Thus, these
1991 files were ending up world-writeable. This was not a big issue, because,
1992 being within the spool directory, they were not world-accessible. I have
1993 created a function called modefopen, which takes an additional mode
1994 argument. It sets umask(777), creates the file, chmods it to the required
1995 mode, then resets the umask. All the relevant calls to fopen() in the
1996 content scanning code have been changed to use this function.
1998 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1999 to 24 hours. This avoids potential overflow problems when processing G
2000 and H retry rules. I suspect nobody ever tinkers with this value.
2002 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2004 PH/45 When the plaintext authenticator is running as a client, the server's
2005 challenges are checked to ensure they are valid base64 strings. By
2006 default, the authentication attempt is cancelled if an invalid string is
2007 received. Setting client_ignore_invalid_base64 true ignores these errors.
2008 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2009 they are received. Thus, the responses can be made to depend on the
2010 challenges. If an invalid string is ignored, an empty string is placed in
2013 PH/46 Messages that are created by the autoreply transport now contains a
2014 References: header, in accordance with RFCs 2822 and 3834.
2016 PH/47 Added authenticated_sender_force to the smtp transport.
2018 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2020 PH/49 Installed latest patch from the Sieve maintainer.
2022 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2023 was also set, the appendfile transport was unnecessarily scanning a
2024 directory of message files (e.g. for maildir delivery) to find the count
2025 of files (along with the size), even though it did not need this
2026 information. It now does the scan only if it needs to find either the
2027 size of the count of files.
2029 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2031 PH/52 Two bugs concerned with error handling when the smtp transport is
2034 (i) Exim was not creating retry information for temporary errors given
2035 for individual recipients after the DATA command when the smtp transport
2036 was used in LMTP mode. This meant that they could be retried too
2037 frequently, and not timed out correctly.
2039 (ii) Exim was setting the flag that allows error details to be returned
2040 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2041 recipients that were returned after the DATA command.
2043 PH/53 This is related to PH/52, but is more general: for any failing address,
2044 when detailed error information was permitted to be returned to the
2045 sender, but the error was temporary, then after the final timeout, only
2046 "retry timeout exceeded" was returned. Now it returns the full error as
2047 well as "retry timeout exceeded".
2049 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2050 do this, and (what is worse) MTAs that accept it.
2052 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2053 will now be deprecated.
2055 PH/56 New os.c-cygwin from the Cygwin maintainer.
2057 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2058 formats (previously only available in exim formats via -bpr, -bpru,
2059 and -bpra. Now also available in native and exiqgrep formats)
2061 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2062 with very large, slow to parse queues
2064 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2066 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2068 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2069 responses to authentication challenges, though it was showing the
2070 challenges; (ii) I've removed the CR characters from the debug output for
2073 PH/58 Allow for the insertion of a newline as well as a space when a string
2074 is turned into more than one encoded-word during RFC 2047 encoding. The
2075 Sieve code now uses this.
2077 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2078 data_4xx, lost_connection, tls_required.
2080 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2081 message was being sent as an SMTP response.
2083 PH/61 Add -l and -k options to exicyclog.
2085 PH/62 When verifying, if an address was redirected to one new address, so that
2086 verification continued, and the new address failed or deferred after
2087 having set something in $address_data, the value of $address_data was not
2088 passed back to the ACL. This was different to the case when no
2089 redirection occurred. The value is now passed back in both cases.
2091 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2092 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2093 use login_cap.h, so on its own it isn't the distinguishing feature. The
2094 new name refers directly to the setclassresources() function.
2096 PH/65 Added configuration files for NetBSD3.
2098 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2100 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2101 is preferred over IPv4.
2103 PH/68 The bounce_return_message and bounce_return_body options were not being
2104 honoured for bounces generated during the reception of non-SMTP messages.
2105 In particular, this applied to messages rejected by the ACL. This bug has
2106 been fixed. However, if bounce_return_message is true and bounce_return_
2107 body is false, the headers that are returned for a non-SMTP message
2108 include only those that have been read before the error was detected.
2109 (In the case of an ACL rejection, they have all been read.)
2111 PH/69 The HTML version of the specification is now built in a directory called
2112 spec_html instead of spec.html, because the latter looks like a path with
2113 a MIME-type, and this confuses some software.
2115 PH/70 Catch two compiler warnings in sieve.c.
2117 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2118 function verify_get_ident() calls ip_connect() to connect a socket, but
2119 if the "connect()" function timed out, ip_connect() used to close the
2120 socket. However, verify_get_ident() also closes the socket later, and in
2121 between Exim writes to the log, which may get opened at this point. When
2122 the socket was closed in ip_connect(), the log could get the same file
2123 descriptor number as the socket. This naturally causes chaos. The fix is
2124 not to close the socket in ip_connect(); the socket should be closed by
2125 the function that creates it. There was only one place in the code where
2126 this was missing, in the iplookup router, which I don't think anybody now
2127 uses, but I've fixed it anyway.
2129 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2130 well as to direct DNS lookups. Otherwise the handling of names in host
2131 lists is inconsistent and therefore confusing.
2137 PH/01 Two changes to the default runtime configuration:
2139 (1) Move the checks for relay_from_hosts and authenticated clients from
2140 after to before the (commented out) DNS black list checks.
2142 (2) Add control=submission to the relay_from_hosts and authenticated
2143 clients checks, on the grounds that messages accepted by these
2144 statements are most likely to be submissions.
2146 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2148 (1) Generate an error if the third argument for the ${prvs expansion is
2151 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2154 (3) Reset the variables that are obtained from the first argument of
2155 ${prvscheck and used in the second argument before leaving the code,
2156 because their memory is reclaimed, so using them afterwards may do
2159 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2160 one (it's much easier than Tom thought :-).
2162 (5) Because of (4), we can now allow for the use of $prvscheck_result
2163 inside the third argument.
2165 PH/03 For some reason, the default setting of PATH when running a command from
2166 a pipe transport was just "/usr/bin". I have changed it to
2169 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2170 anything to be listed in the output from -bV.
2172 PH/05 When a filter generated an autoreply, the entire To: header line was
2173 quoted in the delivery log line, like this:
2175 => >A.N.Other <ano@some.domain> <original@ddress> ...
2177 This has been changed so that it extracts the operative address. There
2178 may be more than one such address. If so, they are comma-separated, like
2181 => >ano@some.domain,ona@other.domain <original@ddress> ...
2183 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2184 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2185 not being looked up in the rDNS to get a host name, Exim was showing the
2186 IP address twice in Received: lines, even though the IP addresses were
2187 identical. For example:
2189 Received: from [1.2.3.4] (helo=[1.2.3.4])
2191 However, if the real host name was known, it was omitting the HELO data
2192 if it matched the actual IP address. This has been tidied up so that it
2193 doesn't show the same IP address twice.
2195 PH/07 When both +timestamp and +memory debugging was on, the value given by
2196 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2197 called by the debug printing, thereby overwriting the timestamp buffer.
2198 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2200 PH/08 When the original message was included in an autoreply transport, it
2201 always said "this is a copy of the message, including all the headers",
2202 even if body_only or headers_only was set. It now gives an appropriate
2205 PH/09 Applied a patch from the Sieve maintainer which:
2207 o fixes some comments
2208 o adds the (disabled) notify extension core
2209 o adds some debug output for the result of if/elsif tests
2210 o points to the current vacation draft in the documentation
2211 and documents the missing references header update
2215 o fixes a bug in processing the envelope test (when testing
2216 multiple envelope elements, the last element determinted the
2219 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2220 Electronic Mail") by including:
2222 Auto-submitted: auto-generated
2224 in the messages that it generates (bounce messages and others, such as
2225 warnings). In the case of bounce messages for non-SMTP mesages, there was
2226 also a typo: it was using "Auto_submitted" (underscore instead of
2227 hyphen). Since every message generated by Exim is necessarily in response
2228 to another message, thes have all been changed to:
2230 Auto-Submitted: auto-replied
2232 in accordance with these statements in the RFC:
2234 The auto-replied keyword:
2236 - SHOULD be used on messages sent in direct response to another
2237 message by an automatic process,
2239 - MUST NOT be used on manually-generated messages,
2241 - MAY be used on Delivery Status Notifications (DSNs) and Message
2242 Disposition Notifications (MDNs),
2244 - MUST NOT be used on messages generated by automatic or periodic
2245 processes, except for messages which are automatic responses to
2248 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2249 to the default Received: header definition.
2251 PH/12 Added log selector acl_warn_skipped (default on).
2253 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2254 variables because (a) they are in the wrong storage pool and (b) even if
2255 they were copied, it wouldn't work properly because of the caching.
2257 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2258 checking when decoding. Apparently there are clients that generate
2259 overlong encoded strings. Why am I not surprised?
2261 PH/15 If the first argument of "${if match_address" was not empty, but did not
2262 contain an "@" character, Exim crashed. Now it writes a panic log message
2263 and treats the condition as false.
2265 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2267 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2268 extension "envelope-auth". The code is finished and in agreement with
2269 other implementations, but there is no documentation so far and in fact,
2270 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2271 not changing the active code.
2273 Print executed "if" and "elsif" statements when debugging is used. This
2274 helps a great deal to understand what a filter does.
2276 Document more things not specified clearly in RFC3028. I had all this
2277 sorted out, when out of a sudden new issues came to my mind. Oops."
2279 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2282 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2283 canonical form (as documented). However, after a host name lookup from
2284 the IP address, check_host() was doing a simple string comparison with
2285 addresses acquired from the DNS when checking that the found name did
2286 have the original IP as one of its addresses. Since any found IPv6
2287 addresses are likely to be in abbreviated form, the comparison could
2288 fail. Luckily, there already exists a function for doing the comparison
2289 by converting both addresses to binary, so now that is used instead of
2290 the text comparison.
2292 PH/20 There was another similar case to PH/19, when a complete host name was
2293 given in a host list; looking up its IP address could give an abbreviated
2294 form, whereas the current host's name might or might not be abbreviated.
2295 The same fix has been applied.
2301 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2302 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2305 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2306 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2308 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2310 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2311 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2312 Also, for "Auto-Submitted", treat anything other than "no" as
2313 non-personal, in accordance with RFC 3834. (Previously it treated
2314 anything starting "auto-" as non-personal.)
2316 TF/01 The control=submission/name=... option had a problem with syntax
2317 errors if the name included a slash character. The /name= option
2318 now slurps the rest of the string, so it can include any characters
2319 but it must come last in the list of options (after /sender_retain
2322 PH/05 Some modifications to the interface to the fake nameserver for the new
2330 TK/01 Added the "success_on_redirect" address verification option. See
2331 NewStuff for rationale and an example.
2333 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2335 PH/02 Patch to exigrep to allow it to work on syslog lines.
2337 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2338 fread() to skip over the body file's header line, because in Cygwin the
2339 header line is locked and is inaccessible.
2341 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2342 co-exist for some time) to make it clear that it is the Exim ID that is
2343 referenced, not the Message-ID: header line.
2345 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2346 string_format() function, because snprintf() does not exist on all
2349 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2350 ${stat: expansion item.
2352 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2353 protocol synchronization error", to keep the pedants happy.
2355 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2356 well as for IRIX systems, when gcc is being used. See the host.c source
2359 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2361 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2364 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2365 transport and to the smtp transport in LMTP mode.
2367 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2369 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2370 run a filter in a subprocess. This could lead to confusion in subsequent
2371 lookups in the parent process. There should also be a search_tidyup() at
2372 the end of the subprocess.
2374 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2375 only if the host matched helo_try_verify_hosts, which caused the
2376 verification to occur when the EHLO/HELO command was issued. The ACL just
2377 tested the remembered result. Now, if a previous verification attempt has
2378 not happened, "verify = helo" does it there and then.
2380 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2382 TK/03 Fix log output including CR from clamd.
2384 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2385 exist provoked a memory error which could cause a segfault.
2387 PH/15 Installed PCRE 6.2
2389 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2391 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2392 of the problem. Specifically, suggested +O2 rather than +O1 for the
2395 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2397 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2398 record, the port was not correctly logged when the outgoing_port log
2399 selector was set (it logged the transort's default port).
2401 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2402 fallback_hosts, and "hosts" in the smtp transport.
2404 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2405 host errors such as "Connection refused".
2407 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2408 authentication with radiusclient 0.4.9:
2410 - Error returned from rc_read_config was caught wrongly
2411 - Username/password not passed on to radius server due to wrong length.
2413 The presumption is that some radiusclient API changes for 4.51/PH/17
2414 were not taken care of correctly. The code is still untested by me (my
2415 Linux distribution still has 0.3.2 of radiusclient), but it was
2416 contributed by a Radius user.
2418 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2419 expanding the "port" option of the smtp transport.
2421 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2422 while reading a MIME header. Thanks to Tom Hughes for a patch.
2424 PH/24 Include config.h inside local_scan.h so that configuration settings are
2427 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2428 that in an ACL for RCPT (for example), you can examine exactly what was
2431 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2432 commands, but it was not correctly comparing the address with the actual
2433 client host address. Thus, it would show the EHLO address in Received:
2434 header lines when this was not necessary.
2436 PH/27 Added the % operator to ${eval:}.
2438 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2439 it should be ignoring failures (because with -C, for example, it has lost
2440 privilege). It wasn't ignoring creation failures other than "already
2443 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2446 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2447 because an input line was too long, either on its own, or by virtue of
2448 too many continuations, the temporary file was not being removed, and the
2449 return code was incorrect.
2451 PH/31 Missing "BOOL" in function definition in filtertest.c.
2453 PH/32 Applied Sieve patches from the maintainer.
2455 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2457 PH/33 Added "verify = not_blind".
2459 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2460 Local/Makefile (with some defaults set). These are used in built scripts
2461 such as exicyclog, but they have never been used in the exim_install
2462 script (though there are many overriding facilities there). I have
2463 arranged that the exim_install script now takes note of these two
2466 PH/35 Installed configuration files for Dragonfly.
2468 PH/36 When a locally submitted message by a trusted user did not contain a
2469 From: header, and the sender address was obtained from -f or from an SMTP
2470 MAIL command, and the trusted user did not use -F to supply a sender
2471 name, $originator_name was incorrectly used when constructing a From:
2472 header. Furthermore, $originator_name was used for submission mode
2473 messages from external hosts without From: headers in a similar way,
2474 which is clearly wrong.
2476 PH/37 Added control=suppress_local_fixups.
2478 PH/38 When log_selector = +received_sender was set, and the addition of the
2479 sender made the log line's construction buffer exactly full, or one byte
2480 less than full, an overflow happened when the terminating "\n" was
2483 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2484 when the result of a list match is failure because a DNS lookup failed.
2486 PH/40 RM_COMMAND is now used in the building process.
2488 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2489 the "build-* directories that it finds.
2491 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2492 address in a domain literal was a prefix of an interface address.
2494 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2495 when verifying a sender address, unless rewrite_headers is false.
2497 PH/44 Wrote a long comment about why errors_to addresses are verified as
2498 recipients, not senders.
2500 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2501 the ratelimit ACL was added.
2503 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2505 PH/46 Added extra information about PostgreSQL errors to the error string.
2507 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2508 avoiding the need to install special zones in a real server. This is
2509 backwards compatible; if it can't find the fake resolver, it drops back.
2510 Thus, both old and new test suites can be run.
2512 TF/02 Added util/ratelimit.pl
2514 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2515 clock is set back in time.
2517 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2518 Candler <B.Candler@pobox.com>.
2520 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2521 OK for addresses that are the result of redirections.
2523 PH/48 A number of further additions for the benefit of the new test suite,
2524 including a fake gethostbyname() that interfaces to the fake DNS resolver
2527 TF/06 The fix for widen_domains has also been applied to qualify_single and
2528 search_parents which are the other dnslookup options that can cause
2531 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2534 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2536 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2537 service" if it encountered an MX record with an empty target hostname.
2538 The message is now "an MX or SRV record indicated no SMTP service".
2540 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2541 if the DNS of the sending site is misconfigured. This is quite a
2542 common situation. This change restores the behaviour of treating a
2543 helo verification defer as a failure.
2545 PH/51 If self=fail was set on a router, the bounce message did not include the
2546 actual error message.
2552 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2554 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2555 command itself ended in error, the underlying message about the transport
2556 filter timeout was being overwritten with the pipe command error. Now the
2557 underlying error message should be appended to the second error message.
2559 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2561 PH/02 Reduce the amount of output that "make" produces by default. Full output
2562 can still be requested.
2564 PH/03 The warning log line about a condition test deferring for a "warn" verb
2565 was being output only once per connection, rather than after each
2566 occurrence (because it was using the same function as for successful
2567 "warn" verbs). This seems wrong, so I have changed it.
2569 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2570 it should not have, which might have caused a crash in the right
2571 circumstances, but probably never did.
2573 PH/04 Installed a modified version of Tony Finch's patch to make submission
2574 mode fix the return path as well as the Sender: header line, and to
2575 add a /name= option so that you can make the user's friendly name appear
2578 TF/03 Added the control = fakedefer ACL modifier.
2580 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2581 Mark Lowes for thorough testing.
2583 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2585 TK/03 Merged latest SRS patch from Miles Wilton.
2587 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2588 with the definition in sysexits.h (which is #included earlier).
2589 Fortunately, Exim does not actually use EX_OK. The code used to try to
2590 preserve the sysexits.h value, by assumimg that macro definitions were
2591 scanned for macro replacements. I have been disabused of this notion,
2592 so now the code just undefines EX_OK before #including unistd.h.
2594 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2595 in the smtp transport. When a block could not be written in a single
2596 write() function, the timeout was being re-applied to each part-write.
2597 This seems wrong - if the receiver was accepting one byte at a time it
2598 would take for ever. The timeout is now adjusted when this happens. It
2599 doesn't have to be particularly precise.
2601 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2602 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2604 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2605 without a domain if the check to <postmaster@domain> fails.
2607 SC/01 Eximstats: added -xls and the ability to specify output files
2608 (patch written by Frank Heydlauf).
2610 SC/02 Eximstats: use FileHandles for outputing results.
2612 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2614 SC/04 Eximstats: fixed display of large numbers with -nvr option
2616 SC/05 Eximstats: fixed merging of reports with empty tables.
2618 SC/06 Eximstats: added the -include_original_destination flag
2620 SC/07 Eximstats: removed tabs and trailing whitespace.
2622 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2624 TK/06 MBOX spool code: Add real "From " MBOX separator line
2625 so the .eml file is really in mbox format (even though
2626 most programs do not really care). Patch from Alex Miller.
2628 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2629 The latter is generated from $received_to and is only set if the
2630 message has one envelope recipient. SA can use these headers,
2631 obviously out-of-the-box. Patch from Alex Miller.
2633 PH/08 The ${def test on a variable was returning false if the variable's
2634 value was "0", contrary to what the specification has always said!
2635 The result should be true unless the variable is empty.
2637 PH/09 The syntax error of a character other than { following "${if
2638 def:variable_name" (after optional whitespace) was not being diagnosed.
2639 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2640 accidental colon was present, for example, could give incorrect results.
2642 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2643 result is used (not including appendfile, where other changes are about
2646 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2647 This involved changing a lot of size variables from int to off_t. It
2648 should work with maildirs and everything.
2650 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2651 spamd dying while we are connected to it.
2653 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2656 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2657 function for BDB 4.3.
2659 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2661 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2662 the sources for PCRE have been re-arranged and more files are now
2665 PH/15 The code I had for printing potentially long long variables in PH/11
2666 above was not the best (it lost precision). The length of off_t variables
2667 is now inspected at build time, and an appropriate printing format (%ld
2668 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2669 to be "long long int" or "long int". This is needed for the internal
2670 formatting function string_vformat().
2672 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2673 the configuration file to be ":syslog", then the script "guesses" where
2674 the logs files are, rather than using the compiled in default. In our
2675 case the guess is not the same as the compiled default, so the script
2676 suddenly stopped working when I started to use syslog. The patch checks
2677 to see if log_file_path is "". If so, it attempts to read it from exim
2678 with no configuration file to get the compiled in version, before it
2679 falls back to the previous guessing code."
2681 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2682 implementing BATV in an Exim configuration. See NewStuff for the gory
2685 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2686 Makefile that are specific to HP-UX.
2688 PH/18 If the "use_postmaster" option was set for a recipient callout together
2689 with the "random" option, the postmaster address was used as the MAIL
2690 FROM address for the random test, but not for the subsequent recipient
2691 test. It is now used for both.
2693 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2694 patch removes a few documentation additions to RFC 3028, because the
2695 latest draft now contains them. It adds the new en;ascii-case comparator
2696 and a new error check for 8bit text in MIME parts. Comparator and
2697 require names are now matched exactly. I enabled the subaddress
2698 extension, but it is not well tested yet (read: it works for me)."
2700 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2701 rework some of the code of TK/09 above to avoid the hardwired use of
2702 "%lld" and "long long". Replaced the call to snprintf() with a call to
2705 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2706 records point to non-existent hosts", "retry timeout exceeded", and
2707 "retry time not reached for any host after a long failure period".
2709 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2710 experimental DomainKeys support:
2712 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2713 (2) On an error such as an illegally used "control", the wrong name for
2714 the control was given.
2716 These problems did NOT occur unless DomainKeys support was compiled.
2718 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2720 PH/24 Added ${if match_ip condition.
2722 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2723 databases so that it will be absolutely obvious if a crash occurs in the
2724 DB library. This is a regular occurrence (often caused by mis-matched
2727 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2728 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2729 picked up on a user's system that detects such things. There doesn't seem
2730 to be a gcc warning option for this - only an attribute that has to be
2731 put on the function's prototype. It seems that in Fedora Core 4 they have
2732 set this on a number of new functions. No doubt there will be more in due
2735 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2736 specify a transport. However, if an address that was verified by such a
2737 router was the subject of a callout, Exim crashed because it tried to
2738 read the rcpt_include_affixes from the non-existent transport. Now it
2739 just assumes that the setting of that option is false. This bug was
2740 introduced by 4.51/PH/31.
2742 PH/28 Changed -d+all to exclude +memory, because that information is very
2743 rarely of interest, but it makes the output a lot bigger. People tend to
2744 do -d+all out of habit.
2746 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2747 code in os-type was giving problems when libc.so lives in lib64, like on
2750 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2751 aren't the modern standard, and it seems that some systems' include files
2752 don't always have them. Exim was already checking for some of the newer
2753 ones like T_AAAA, and defining it itself. I've added checks for all the
2754 record types that Exim uses.
2756 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2757 not automatically generating a new one, as it is supposed to. This
2758 prevented TLS from working. If the file did exist, but contained invalid
2759 data, a new version was generated, as expected. It was only the case of a
2760 non-existent file that was broken.
2762 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2763 with a change in libdomainkeys > 0.64.
2765 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2766 from DNS. If the selector record carries the flag, it now has
2767 precedence over the domain-wide flag.
2769 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2771 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2772 the use of a port name that isn't defined in /etc/services) occurred, the
2773 message was deferred as in a normal delivery, and thus remained on the
2774 spool, instead of being failed because of the mua_wrapper setting. This
2775 is now fixed, and I tidied up some of the mua_wrapper messages at the
2778 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2779 the messages in a hash of arrays rather than using individual hashes.
2780 This is a bit cleaner and results in dramatic memory savings, albeit
2781 at a slight CPU cost.
2783 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2784 as requested by Marc Sherman.
2786 SC/10 Eximstats: added histograms for user specified patterns as requested
2789 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2791 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2792 fopen() in the content-scanning modules that did not already have it.
2798 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2799 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2801 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2803 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2805 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2806 to test Sieve filters that use "vacation".
2808 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2809 that changes the way the GnuTLS parameters are stored in the cache file.
2810 The new format can be generated externally. For backward compatibility,
2811 if the data in the cache doesn't make sense, Exim assumes it has read an
2812 old-format file, and it generates new data and writes a new file. This
2813 means that you can't go back to an older release without removing the
2816 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2817 work if there are any delivery delays because "one_time" forces the
2818 parent to be marked "delivered", so its unseen clone is never tried
2819 again. For this reason, Exim now forbids the simultaneous setting of
2822 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2823 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2824 entry if you want to know the details. The fix, however, neglected to
2825 consider the case when local delivery batching is involved. The test for
2826 "previously delivered" was not happening when checking to see if an
2827 address could be batched with a previous (undelivered) one; under
2828 certain circumstances this could lead to multiple deliveries to the same
2831 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2832 in its include files, and this causes problems building Exim.
2834 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2835 header_syntax) but Exim was just ignoring anything given after a slash.
2836 In particular, this caused confusion with an attempt to use "verify =
2837 reverse_host_lookup/defer_ok". An error is now given when options are
2838 supplied for verify items that do not have them. (Maybe reverse_host_
2839 lookup should have a defer_ok option, but that's a different point.)
2841 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2842 defined by RFC 821) to 2048, because there were problems with some AUTH
2843 commands, and RFC 1869 says the size should be increased for extended
2844 SMTP commands that take arguments.
2846 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2849 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2850 "unknown" error; now it says that the functionality isn't in the binary.
2852 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2853 an address' error message when a string expansion fails (syntax or
2854 whatever). Otherwise the password may appear in the log. Following change
2855 PH/42 below, there is no longer a chance of it appearing in a bounce
2858 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2860 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2861 of its addresses was ever tried. (Bugzilla bug #2.)
2863 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2864 the result incorrectly in the debug output. (It correctly added a newline
2865 to what was transported.)
2867 TF/01 Added $received_time.
2869 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2870 commented out examples of how to interface to a virus scanner and to
2871 SpamAssassin. Also added commented examples of av_scanner and
2872 spamd_address settings.
2874 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2875 and controls are allowed in which ACLs. There were a couple of minor
2876 errors. Some of the entries in the conditions table (which is a table of
2877 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2878 negation of where the condition IS allowed.
2880 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2882 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2883 header file does not have a version number, so I've had to invent a new
2884 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2885 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2886 radiusclient), but it was contributed by a Radius user.
2888 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2889 files or directories, for OpenSSL.
2891 PH/19 When an Exim process that is running as root has to create an Exim log
2892 file, it does so in a subprocess that runs as exim:exim so as to get the
2893 ownership right at creation (otherwise, other Exim processes might see
2894 the file with the wrong ownership). There was no test for failure of this
2895 fork() call, which would lead to the process getting stuck as it waited
2896 for a non-existent subprocess. Forks do occasionally fail when resources
2897 run out. I reviewed all the other calls to fork(); they all seem to check
2900 PH/20 When checking for unexpected SMTP input at connect time (before writing
2901 the banner), Exim was not dealing correctly with a non-positive return
2902 from the read() function. If the client had disconnected by this time,
2903 the result was a log entry for a synchronization error with an empty
2904 string after "input=" when read() returned zero. If read() returned -1
2905 (an event I could not check), uninitialized data bytes were printed.
2906 There were reports of junk text (parts of files, etc) appearing after
2909 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2911 PH/22 Added support for macro redefinition, and (re)definition in between
2912 driver and ACL definitions.
2914 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2915 forgetting to use the resulting value; it was using the unexpanded value.
2917 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2918 hadn't been configured. The fix is from Juergen Kreileder, who
2919 understands it better than I do:
2921 "Here's what I see happening with three configured cyrus_sasl
2922 authenticators configured (plain, login, cram-md5):
2924 On startup auth_cyrus_sasl_init() gets called for each of these.
2925 This means three calls to sasl_listmech() without a specified mech_list.
2926 => SASL tests which mechs of all available mechs actually work
2927 => three warnings about OTP not working
2928 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2930 With the patch, sasl_listmech() also gets called three times. But now
2931 SASL's mech_list option is set to the server_mech specified in the the
2932 authenticator. Or in other words, the answer from sasl_listmech()
2933 gets limited to just the mech you're testing for (which is different
2935 => the return list contains just 'plain' or 'login', 'cram-md5' or
2936 nothing depending on the value of ob->server_mech.
2938 I've just tested the patch: Authentication still works fine,
2939 unavailable mechs specified in the exim configuration are still
2940 caught, and the auth.log warnings about OTP are gone."
2942 PH/25 When debugging is enabled, the contents of the command line are added
2943 to the debugging output, even when log_selector=+arguments is not
2946 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2947 answer is "GNU", and only if the return is "GNU/something" is the answer
2950 PH/27 $acl_verify_message is now set immediately after the failure of a
2951 verification in an ACL, and so is available in subsequent modifiers. In
2952 particular, the message can be preserved by coding like this:
2954 warn !verify = sender
2955 set acl_m0 = $acl_verify_message
2957 Previously, $acl_verify_message was set only while expanding "message"
2958 and "log_message" when a very denied access.
2960 PH/28 Modified OS/os.c-Linux with
2962 -#ifndef OS_LOAD_AVERAGE
2963 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2965 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2966 nomenclature these days.)
2968 PH/29 Installed patch from the Sieve maintainer that adds the options
2969 sieve_useraddress and sieve_subaddress to the redirect router.
2971 PH/30 In these circumstances:
2972 . Two addresses routed to the same list of hosts;
2973 . First host does not offer TLS;
2974 . First host accepts first address;
2975 . First host gives temporary error to second address;
2976 . Second host offers TLS and a TLS session is established;
2977 . Second host accepts second address.
2978 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2979 and peerdn, if requested) that were in fact used only for the second
2982 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2983 attention to any local part prefix or suffix that was matched by the
2984 router that accepted the address. It now behaves in the same way as it
2985 does for delivery: the affixes are removed from the local part unless
2986 rcpt_include_affixes is set on the transport.
2988 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2989 timeout during the DATA phase of an incoming message.
2991 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2992 applied a patch sanctioned by the Sieve maintainer.
2994 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2995 the uid or gid is negative. A case of a negative gid caused this to be
2996 noticed. The fix allows for either to be negative.
2998 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2999 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3002 PH/36 The change PH/12 above was broken. Fixed it.
3004 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3005 the grounds that routing the same address twice would always produce the
3006 same answer. This might have been true once, but it is certainly no
3007 longer true now. Routing a child address may depend on the previous
3008 routing that produced that child. Some complicated redirection strategies
3009 went wrong when messages had multiple recipients, and made Exim's
3010 behaviour dependent on the order in which the addresses were given.
3012 I have moved the duplicate checking until after the routing is complete.
3013 Exim scans the addresses that are assigned to local and remote
3014 transports, and removes any duplicates. This means that more work will be
3015 done, as duplicates will always all be routed, but duplicates are
3016 presumably rare, so I don't expect this is of any significance.
3018 For deliveries to pipes, files, and autoreplies, the duplicate checking
3019 still happens during the routing process, since they are not going to be
3022 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3023 It corrects a timeout issue with spamd. This is Ian's comment: "The
3024 background is that sometimes spamd either never reads data from a
3025 connection it has accepted, or it never writes response data. The exiscan
3026 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3027 blindly assumes that writes won't block so it may never time out."
3029 PH/39 Allow G after quota size as well as K and M.
3031 PH/40 The value set for $authenticated_id in an authenticator may not contain
3032 binary zeroes or newlines because the value is written to log lines and
3033 to spool files. There was no check on this. Now the value is run through
3034 the string_printing() function so that such characters are converted to
3035 printable escape sequences.
3037 PH/41 $message_linecount is a new variable that contains the total number of
3038 lines in the message. Compare $body_linecount, which is the count for the
3041 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3042 bounce and delay warning messages, except in certain special cases, which
3045 (a) An SMTP error message from a remote host;
3046 (b) A message specified in a :fail: redirection;
3047 (c) A message specified in a "fail" command in a system filter;
3048 (d) A message specified in a FAIL return from the queryprogram router;
3049 (e) A message specified by the cannot_route_message router option.
3051 In these cases only, Exim does include the error details in bounce and
3052 warning messages. There are also a few cases where bland messages such
3053 as "unrouteable address" or "local delivery error" are given.
3055 PH/43 $value is now also set for the "else" part of a ${run expansion.
3057 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3058 being worked on, but at least Exim now implements the latest version to
3061 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3062 process to complete was treated as a delivery failure, a timeout while
3063 writing the message to the pipe was logged, but erroneously treated as a
3064 successful delivery. Such timeouts include transport filter timeouts. For
3065 consistency with the overall process timeout, these timeouts are now
3066 treated as errors, giving rise to delivery failures by default. However,
3067 there is now a new Boolean option for the pipe transport called
3068 timeout_defer, which, if set TRUE, converts the failures into defers for
3069 both kinds of timeout. A transport filter timeout is now identified in
3072 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3073 systems where "make" and "gmake" are different, calling "gmake" at top
3074 level broke things. I've arranged for the value of $(MAKE) to be passed
3075 from the Makefile to this script so that it can call the same version of
3079 A note about Exim versions 4.44 and 4.50
3080 ----------------------------------------
3082 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3083 changes of various kinds. As a consequence, a big documentation update was
3084 needed. This delayed the release for rather longer than seemed good, especially
3085 in the light of a couple of (minor) security issues. Therefore, the changes
3086 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3087 release. So 4.44 and 4.50 are in effect two different branches that both start
3090 I have left the 4.50 change log unchanged; it contains all the changes since
3091 4.43. The change log for 4.44 is below; many of its items are identical to
3092 those for 4.50. This seems to be the most sensible way to preserve the
3093 historical information.
3099 1. Minor wording change to the doc/README.SIEVE file.
3101 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3102 computation of the current number of files was incorrect.
3104 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3105 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3108 4. Give more explanation in the error message when the command for a transport
3109 filter fails to execute.
3111 5. There are several places where Exim runs a non-Exim command in a
3112 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3113 was being done only for the command run by the queryprogram router. It is
3114 now done for all such subprocesses. The other cases are: ${run, transport
3115 filters, and the commands run by the lmtp and pipe transports.
3117 6. Added CONFIGURE_GROUP build-time option.
3119 7. Some older OS have a limit of 256 on the maximum number of file
3120 descriptors. Exim was using setrlimit() to set 1000 as a large value
3121 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3122 systems. I've change it so that if it can't get 1000, it tries for 256.
3124 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3125 was an oversight, and furthermore, ever since the addition of extra
3126 controls (e.g. 4.43/32), the checks on when to allow different forms of
3127 "control" were broken. There should now be diagnostics for all cases when a
3128 control that does not make sense is encountered.
3130 9. Added the /retain_sender option to "control=submission".
3132 10. $recipients is now available in the predata ACL (oversight).
3134 11. Tidy the search cache before the fork to do a delivery from a message
3135 received from the command line. Otherwise the child will trigger a lookup
3136 failure and thereby defer the delivery if it tries to use (for example) a
3137 cached ldap connection that the parent has called unbind on.
3139 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3140 of $address_data from the recipient verification was clobbered by the
3141 sender verification.
3143 13. The value of address_data from a sender verification is now available in
3144 $sender_address_data in subsequent conditions in the ACL statement.
3146 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3148 15. Added a new option "connect=<time>" to callout options, to set a different
3151 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3152 was its contents. (It was OK if the option was not defined at all.)
3154 17. A "Completed" log line is now written for messages that are removed from
3155 the spool by the -Mrm option.
3157 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3158 information about exactly what failed.
3160 19. Added -dd to debug only the daemon process.
3162 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3163 handles timeouts, both on the server side and network timeouts. Renamed the
3164 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3166 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3167 It is now set to "smtps".
3169 22. $host_address is now set to the target address during the checking of
3170 ignore_target_hosts.
3172 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3173 being passed; this would have caused $sender_host_name to have been used if
3174 matching the list had actually called for a host name (not very likely,
3175 since this list is usually IP addresses). A host name is now passed as
3178 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3179 code that specifies a non-restarting handler (typically sigaction() in
3180 modern systems) in an attempt to fix a rare and obscure crash bug.
3182 25. Narrowed the window for a race in the daemon that could cause it to ignore
3183 SIGCHLD signals. This is not a major problem, because they are used only to
3184 wake it up if nothing else does.
3186 26. A malformed maildirsize file could cause Exim to calculate negative values
3187 for the mailbox size or file count. Odd effects could occur as a result.
3188 The maildirsize information is now recalculated if the size or filecount
3191 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3192 support for a long time. Removed HAVE_SYS_VFS_H.
3194 28. Installed the latest version of exipick from John Jetmore.
3196 29. In an address list, if the pattern was not a regular expression, an empty
3197 subject address (from a bounce message) matched only if the pattern was an
3198 empty string. Non-empty patterns were not even tested. This was the wrong
3199 because it is perfectly reasonable to use an empty address as part of a
3200 database query. An empty address is now tested by patterns that are
3201 lookups. However, all the other forms of pattern expect the subject to
3202 contain a local part and a domain, and therefore, for them, an empty
3203 address still always fails if the pattern is not itself empty.
3205 30. Exim went into a mad DNS loop when attempting to do a callout where the
3206 host was specified on an smtp transport, and looking it up yielded more
3207 than one IP address.
3209 31. Re-factored the code for checking spool and log partition space into a
3210 function that finds that data and another that does the check. The former
3211 is then used to implement four new variables: $spool_space, $log_space,
3212 $spool_inodes, and $log_inodes.
3214 32. The RFC2047 encoding function was originally intended for short strings
3215 such as real names; it was not keeping to the 75-character limit for
3216 encoded words that the RFC imposes. It now respects the limit, and
3217 generates multiple encoded words if necessary. To be on the safe side, I
3218 have increased the buffer size for the ${rfc2047: expansion operator from
3221 33. It is now permitted to omit both strings after an "if" condition; if the
3222 condition is true, the result is "true". As before, when the second string
3223 is omitted, a false condition yields an empty string. This makes it less
3224 cumbersome to write custom ACL and router conditions.
3226 34. Failure to deliver a bounce message always caused it to be frozen, even if
3227 there was an errors_to setting on the router. The errors_to setting is now
3230 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3231 canonical form (fully expanded) before being placed in
3232 $sender_host_address.
3234 36. The table in the code that translates DNS record types into text (T_A to
3235 "A" for instance) was missing entries for NS and CNAME. It is just possible
3236 that this could have caused confusion if both these types were looked up
3237 for the same domain, because the text type is used as part of Exim's
3238 per-process caching. But the chance of anyone hitting this buglet seems
3241 37. The dnsdb lookup has been extended in a number of ways.
3243 (1) There is a new type, "zns", which walks up the domain tree until it
3244 finds some nameserver records. It should be used with care.
3246 (2) There is a new type, "mxh", which is like "mx" except that it returns
3247 just the host names, not the priorities.
3249 (3) It is now possible to give a list of domains (or IP addresses) to be
3250 looked up. The behaviour when one of the lookups defers can be
3251 controlled by a keyword.
3253 (4) It is now possible to specify the separator character for use when
3254 multiple records are returned.
3256 38. The dnslists ACL condition has been extended: it is now possible to supply
3257 a list of IP addresses and/or domains to be looked up in a particular DNS
3260 39. Added log_selector=+queue_time_overall.
3262 40. When running the queue in the test harness, wait just a tad after forking a
3263 delivery process, to get repeatability of debugging output.
3265 41. Include certificate and key file names in error message when GnuTLS fails
3266 to set them up, because the GnuTLS error message doesn't include the name
3267 of the failing file when there is a problem reading it.
3269 42. Allow both -bf and -bF in the same test run.
3271 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3273 44. The "Exiscan patch" is now merged into the mainline Exim source.
3275 45. Sometimes the final signoff response after QUIT could fail to get
3276 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3277 < 0 before doing a fflush(). This bug looks as though it goes back to the
3278 introduction of TLS in release 3.20, but "sometimes" must have been rare
3279 because the tests only now provoked it.
3281 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3282 (this can affect the format of dates).
3284 47. exim_tidydb, when checking for the continued existence of a message for
3285 which it has found a message-specific retry record, was not finding
3286 messages that were in split spool directories. Consequently, it was
3287 deleting retry records that should have stayed in existence.
3289 48. Steve fixed some bugs in eximstats.
3291 49. The SPA authentication driver was not abandoning authentication and moving
3292 on to the next authenticator when an expansion was forced to fail,
3293 contradicting the general specification for all authenticators. Instead it
3294 was generating a temporary error. It now behaves as specified.
3296 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3297 (the order specifies the preference for clients). The order is now AES256,
3298 AES128, 3DES, ARCFOUR128.
3300 51. Small patch to Sieve code - explicitly set From: when generating an
3303 52. Exim crashed if a remote delivery caused a very long error message to be
3304 recorded - for instance if somebody sent an entire SpamAssassin report back
3305 as a large number of 550 error lines. This bug was coincidentally fixed by
3306 increasing the size of one of Exim's internal buffers (big_buffer) that
3307 happened as part of the Exiscan merge. However, to be on the safe side, I
3308 have made the code more robust (and fixed the comments that describe what
3311 53. Now that there can be additional text after "Completed" in log lines (if
3312 the queue_time_overall log selector is set), a one-byte patch to exigrep
3313 was needed to allow it to recognize "Completed" as not the last thing in
3316 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3317 patch that reportedly fixes this has been added. I am not expert enough to
3318 create a test for it. This is what the patch creator wrote:
3320 "I found a little strange behaviour of ldap code when working with
3321 Windows 2003 AD Domain, where users was placed in more than one
3322 Organization Units. When I tried to give exim partial DN, the exit code
3323 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3324 But simultaneously result of request was absolutely normal ldap result,
3325 so I produce this patch..."
3327 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3328 REFERENCE, so I have modified the code to exclude the patch when that macro
3331 55. Some experimental protocols are using DNS PTR records for new purposes. The
3332 keys for these records are domain names, not reversed IP addresses. The
3333 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3334 leaves it alone. Component reversal etc. now happens only for IP addresses.
3337 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3339 57. Double the size of the debug message buffer (to 2048) so that more of very
3340 long debug lines gets shown.
3342 58. The exicyclog utility now does better if the number of log files to keep
3343 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3345 59. Two changes related to the smtp_active_hostname option:
3347 (1) $smtp_active_hostname is now available as a variable.
3348 (2) The default for smtp_banner uses $smtp_active_hostname instead
3349 of $primary_hostname.
3351 60. The host_aton() function is supposed to be passed a string that is known
3352 to be a valid IP address. However, in the case of IPv6 addresses, it was
3353 not checking this. This is a hostage to fortune. Exim now panics and dies
3354 if the condition is not met. A case was found where this could be provoked
3355 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3356 components; fortuitously, this particular loophole had already been fixed
3357 by change 4.50/55 above.
3359 If there are any other similar loopholes, the new check in host_aton()
3360 itself should stop them being exploited. The report I received stated that
3361 data on the command line could provoke the exploit when Exim was running as
3362 exim, but did not say which command line option was involved. All I could
3363 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3364 running as the user.
3367 61. There was a buffer overflow vulnerability in the SPA authentication code
3368 (which came originally from the Samba project). I have added a test to the
3369 spa_base64_to_bits() function which I hope fixes it.
3372 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3373 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3375 63. The daemon start-up calls getloadavg() while still root for those OS that
3376 need the first call to be done as root, but it missed one case: when
3377 deliver_queue_load_max is set with deliver_drop_privilege. This is
3378 necessary for the benefit of the queue runner, because there is no re-exec
3379 when deliver_drop_privilege is set.
3381 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3382 This has been fixed.
3384 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3385 was in use, was not putting the data itself into the right store pool;
3386 consequently, it could be overwritten for a subsequent message in the same
3387 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3390 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3392 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3393 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3394 the function were treating the return as a boolean value, which happened to
3395 work because 0=false and not-0=true, but is not correct code.
3397 68. The host_aton() function was not handling scoped IPv6 addresses (those
3398 with, for example, "%eth0" on the end) correctly.
3400 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3401 negated items (that is, ~something) in unsigned ints. Some compilers
3402 apparently mutter when there is no cast.
3404 70. If an address verification called from an ACL failed, and did not produce a
3405 user-specific message (i.e. there was only a "system" message), nothing was
3406 put in $acl_verify_message. In this situation, it now puts the system
3409 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3410 session; change 4.31/43 added the unwanted input to the log line - except
3411 that it did not do this in the start of session case. It now does.
3413 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3414 This is wrong and can cause the other end to generate a synchronization
3415 error if it is another Exim or anything else that does the synchronization
3416 check. A QUIT command is no longer sent after a timeout.
3418 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3419 during host lookups.
3421 74. The defer_ok option of callout verification was not working if it was used
3422 when verifying addresses in header lines, that is, for this case:
3424 verify = header_sender/callout=defer_ok
3426 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3427 those file descriptors could be used for SMTP connections. If anything
3428 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3429 could be sent to the SMTP client, causing chaos. The daemon now opens
3430 stdin, stdout, and stderr to /dev/null when it puts itself into the
3433 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3434 log by default. The user can override this with suitable Perl magic.
3436 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3437 the log message when discard triggers, was not working for the DATA ACL or
3438 for the non-SMTP ACL.
3440 78. Error message wording change in sieve.c.
3442 79. If smtp_accept_max_per_host was set, the number of connections could be
3443 restricted to fewer than expected, because the daemon was trying to set up
3444 a new connection before checking whether the processes handling previous
3445 connections had finished. The check for completed processes is now done
3446 earlier. On busy systems, this bug wouldn't be noticed because something
3447 else would have woken the daemon, and it would have reaped the completed
3450 80. If a message was submitted locally by a user whose login name contained one
3451 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3452 It caused a spool format error. I have fixed the spool reading code. A
3453 related problem was that the "from" clause in the Received: line became
3454 illegal because of the space(s). It is now covered by ${quote_local_part.
3456 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3459 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3461 83. Patch from Sieve maintainer to fix unterminated string problem in
3462 "vacation" handling.
3464 84. Some minor changes to the Linux configuration files to help with other
3465 OS variants using glibc.
3467 85. One more patch for Sieve to update vacation handling to latest spec.
3470 ----------------------------------------------------
3471 See the note above about the 4.44 and 4.50 releases.
3472 ----------------------------------------------------
3478 1. Change 4.43/35 introduced a bug that caused file counts to be
3479 incorrectly computed when quota_filecount was set in an appendfile
3482 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3483 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3486 3. Give more explanation in the error message when the command for a transport
3487 filter fails to execute.
3489 4. There are several places where Exim runs a non-Exim command in a
3490 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3491 was being done only for the command run by the queryprogram router. It is
3492 now done for all such subprocesses. The other cases are: ${run, transport
3493 filters, and the commands run by the lmtp and pipe transports.
3495 5. Some older OS have a limit of 256 on the maximum number of file
3496 descriptors. Exim was using setrlimit() to set 1000 as a large value
3497 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3498 systems. I've change it so that if it can't get 1000, it tries for 256.
3500 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3501 was an oversight, and furthermore, ever since the addition of extra
3502 controls (e.g. 4.43/32), the checks on when to allow different forms of
3503 "control" were broken. There should now be diagnostics for all cases when a
3504 control that does not make sense is encountered.
3506 7. $recipients is now available in the predata ACL (oversight).
3508 8. Tidy the search cache before the fork to do a delivery from a message
3509 received from the command line. Otherwise the child will trigger a lookup
3510 failure and thereby defer the delivery if it tries to use (for example) a
3511 cached ldap connection that the parent has called unbind on.
3513 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3514 of $address_data from the recipient verification was clobbered by the
3515 sender verification.
3517 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3518 was its contents. (It was OK if the option was not defined at all.)
3520 11. A "Completed" log line is now written for messages that are removed from
3521 the spool by the -Mrm option.
3523 12. $host_address is now set to the target address during the checking of
3524 ignore_target_hosts.
3526 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3527 being passed; this would have caused $sender_host_name to have been used if
3528 matching the list had actually called for a host name (not very likely,
3529 since this list is usually IP addresses). A host name is now passed as
3532 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3533 code that specifies a non-restarting handler (typically sigaction() in
3534 modern systems) in an attempt to fix a rare and obscure crash bug.
3536 15. Narrowed the window for a race in the daemon that could cause it to ignore
3537 SIGCHLD signals. This is not a major problem, because they are used only to
3538 wake it up if nothing else does.
3540 16. A malformed maildirsize file could cause Exim to calculate negative values
3541 for the mailbox size or file count. Odd effects could occur as a result.
3542 The maildirsize information is now recalculated if the size or filecount
3545 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3546 support for a long time. Removed HAVE_SYS_VFS_H.
3548 18. Updated exipick to current release from John Jetmore.
3550 19. Allow an empty sender to be matched against a lookup in an address list.
3551 Previously the only cases considered were a regular expression, or an
3554 20. Exim went into a mad DNS lookup loop when doing a callout where the
3555 host was specified on the transport, if the DNS lookup yielded more than
3558 21. The RFC2047 encoding function was originally intended for short strings
3559 such as real names; it was not keeping to the 75-character limit for
3560 encoded words that the RFC imposes. It now respects the limit, and
3561 generates multiple encoded words if necessary. To be on the safe side, I
3562 have increased the buffer size for the ${rfc2047: expansion operator from
3565 22. Failure to deliver a bounce message always caused it to be frozen, even if
3566 there was an errors_to setting on the router. The errors_to setting is now
3569 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3570 canonical form (fully expanded) before being placed in
3571 $sender_host_address.
3573 24. Updated eximstats to version 1.33
3575 25. Include certificate and key file names in error message when GnuTLS fails
3576 to set them up, because the GnuTLS error message doesn't include the name
3577 of the failing file when there is a problem reading it.
3579 26. Expand error message when OpenSSL has problems setting up cert/key files.
3582 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3583 (this can affect the format of dates).
3585 28. exim_tidydb, when checking for the continued existence of a message for
3586 which it has found a message-specific retry record, was not finding
3587 messages that were in split spool directories. Consequently, it was
3588 deleting retry records that should have stayed in existence.
3590 29. eximstats updated to version 1.35
3591 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3592 1.35 - bugfix such that pie charts by volume are generated correctly
3594 30. The SPA authentication driver was not abandoning authentication and moving
3595 on to the next authenticator when an expansion was forced to fail,
3596 contradicting the general specification for all authenticators. Instead it
3597 was generating a temporary error. It now behaves as specified.
3599 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3600 (the order specifies the preference for clients). The order is now AES256,
3601 AES128, 3DES, ARCFOUR128.
3603 31. Small patch to Sieve code - explicitly set From: when generating an
3606 32. Exim crashed if a remote delivery caused a very long error message to be
3607 recorded - for instance if somebody sent an entire SpamAssassin report back
3608 as a large number of 550 error lines. This bug was coincidentally fixed by
3609 increasing the size of one of Exim's internal buffers (big_buffer) that
3610 happened as part of the Exiscan merge. However, to be on the safe side, I
3611 have made the code more robust (and fixed the comments that describe what
3614 33. Some experimental protocols are using DNS PTR records for new purposes. The
3615 keys for these records are domain names, not reversed IP addresses. The
3616 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3617 leaves it alone. Component reversal etc. now happens only for IP addresses.
3620 34. The host_aton() function is supposed to be passed a string that is known
3621 to be a valid IP address. However, in the case of IPv6 addresses, it was
3622 not checking this. This is a hostage to fortune. Exim now panics and dies
3623 if the condition is not met. A case was found where this could be provoked
3624 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3625 components; fortuitously, this particular loophole had already been fixed
3626 by change 4.50/55 or 4.44/33 above.
3628 If there are any other similar loopholes, the new check in host_aton()
3629 itself should stop them being exploited. The report I received stated that
3630 data on the command line could provoke the exploit when Exim was running as
3631 exim, but did not say which command line option was involved. All I could
3632 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3633 running as the user.
3636 35. There was a buffer overflow vulnerability in the SPA authentication code
3637 (which came originally from the Samba project). I have added a test to the
3638 spa_base64_to_bits() function which I hope fixes it.
3641 36. The daemon start-up calls getloadavg() while still root for those OS that
3642 need the first call to be done as root, but it missed one case: when
3643 deliver_queue_load_max is set with deliver_drop_privilege. This is
3644 necessary for the benefit of the queue runner, because there is no re-exec
3645 when deliver_drop_privilege is set.
3647 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3648 was in use, was not putting the data itself into the right store pool;
3649 consequently, it could be overwritten for a subsequent message in the same
3650 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3653 38. Sometimes the final signoff response after QUIT could fail to get
3654 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3655 < 0 before doing a fflush(). This bug looks as though it goes back to the
3656 introduction of TLS in release 3.20, but "sometimes" must have been rare
3657 because the tests only now provoked it.
3663 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3664 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3665 Now it returns an integer. A number of calls were still expecting a T/F
3666 return. Fortuitously, in all cases, the tests worked in OK situations,
3667 which is the norm. However, things would have gone wrong on any write
3668 failures on the smtp file descriptor. This function is used when sending
3669 messages over SMTP and also when doing verify callouts.
3671 2. When Exim is called to do synchronous delivery of a locally submitted
3672 message (the -odf or -odi options), it no longer closes stderr before doing
3675 3. Implemented the mua_wrapper option.
3677 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3679 5. Implemented the functions header_remove(), header_testname(),
3680 header_add_at_position(), and receive_remove_recipient(), and exported them
3683 6. If an ACL "warn" statement specified the addition of headers, Exim already
3684 inserted X-ACL-Warn: at the start if there was no header name. However, it
3685 was not making this test for the second and subsequent header lines if
3686 there were newlines in the string. This meant that an invalid header could
3687 be inserted if Exim was badly configured.
3689 7. Allow an ACL "warn" statement to add header lines at the start or after all
3690 the Received: headers, as well as at the end.
3692 8. Added the rcpt_4xx retry error code.
3694 9. Added postmaster_mailfrom=xxx to callout verification option.
3696 10. Added mailfrom=xxxx to the callout verification option, for verify=
3699 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3700 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3702 12. Inserted some casts to stop certain compilers warning when using pointer
3703 differences as field lengths or precisions in printf-type calls (mostly
3704 affecting debugging statements).
3706 13. Added optional readline() support for -be (dynamically loaded).
3708 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3709 same clock tick as a message's arrival, so that its received time was the
3710 same as the "first fail" time on the retry record, and that message
3711 remained on the queue past the ultimate address timeout, every queue runner
3712 would try a delivery (because it was past the ultimate address timeout) but
3713 after another failure, the ultimate address timeout, which should have then
3714 bounced the address, did not kick in. This was a "< instead of <=" error;
3715 in most cases the first failure would have been in the next clock tick
3716 after the received time, and all would be well.
3718 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3719 being recognized when the domain list was tested by the match_domain
3720 condition in an expansion string.
3722 16. Added the ${str2b64: operator.
3724 17. Exim was always calling setrlimit() to set a large limit for the number of
3725 processes, without checking whether the existing limit was already
3726 adequate. (It did check for the limit on file descriptors.) Furthermore,
3727 errors from getrlimit() and setrlimit() were being ignored. Now they are
3728 logged to the main and panic logs, but Exim does carry on, to try to do its
3729 job under whatever limits there are.
3731 18. Imported PCRE 5.0.
3733 19. Trivial typo in log message " temporarily refused connection" (the leading
3736 20. If the log selector return_path_on_delivery was set and an address was
3737 redirected to /dev/null, the delivery process crashed because it assumed
3738 that a return path would always be set for a "successful" delivery. In this
3739 case, the whole delivery is bypassed as an optimization, and therefore no
3742 21. Internal re-arrangement: the function for sending a challenge and reading
3743 a response while authentication was assuming a zero-terminated challenge
3744 string. It's now changed to take a pointer and a length, to allow for
3745 binary data in such strings.
3747 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3749 23. Exim was not respecting finduser_retries when seeking the login of the
3750 uid under which it was called; it was always trying 10 times. (The default
3751 setting of finduser_retries is zero.) Also, it was sleeping after the final
3752 failure, which is pointless.
3754 24. Implemented tls_on_connect_ports.
3756 25. Implemented acl_smtp_predata.
3758 26. If the domain in control=submission is set empty, Exim assumes that the
3759 authenticated id is a complete email address when it generates From: or
3760 Sender: header lines.
3762 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3763 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3764 chown and chgrp in /bin and hostname in /usr/bin.
3766 28. Exim was keeping the "process log" file open after each use, just as it
3767 does for the main log. This opens the possibility of it remaining open for
3768 long periods when the USR1 signal hits a daemon. Occasional processlog
3769 errors were reported, that could have been caused by this. Anyway, it seems
3770 much more sensible not to leave this file open at all, so that is what now
3773 29. The long-running daemon process does not normally write to the log once it
3774 has entered its main loop, and it closes the log before doing so. This is
3775 so that log files can straightforwardly be renamed and moved. However,
3776 there are a couple of unusual error situations where the daemon does write
3777 log entries, and I had neglected to close the log afterwards.
3779 30. The text of an SMTP error response that was received during a remote
3780 delivery was being truncated at 512 bytes. This is too short for some of
3781 the long messages that one sometimes sees. I've increased the limit to
3784 31. It is now possible to make retry rules that apply only when a message has a
3785 specific sender, in particular, an empty sender.
3787 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3788 it possible to be selective about when SMTP synchronization is enforced.
3790 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3792 32. Implemented hosts_connection_nolog.
3794 33. Added an ACL for QUIT.
3796 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3799 35. Added mailbox_size and mailbox_filecount to appendfile.
3801 36. Added control = no_multiline_responses to ACLs.
3803 37. There was a bug in the logic of the code that waits for the clock to tick
3804 in the case where the clock went backwards by a substantial amount such
3805 that the microsecond fraction of "now" was more than the microsecond
3806 fraction of "then" (but the whole seconds number was less).
3808 38. Added support for the libradius Radius client library this is found on
3809 FreeBSD (previously only the radiusclient library was supported).
3815 1. When certain lookups returned multiple values in the form name=value, the
3816 quoting of the values was not always being done properly. Specifically:
3817 (a) If the value started with a double quote, but contained no whitespace,
3819 (b) If the value contained whitespace other than a space character (i.e.
3820 tabs or newlines or carriage returns) it was not quoted.
3821 This fix has been applied to the mysql and pgsql lookups by writing a
3822 separate quoting function and calling it from the lookup code. The fix
3823 should probably also be applied to nisplus, ibase and oracle lookups, but
3824 since I cannot test any of those, I have not disturbed their existing code.
3826 2. A hit in the callout cache for a specific address caused a log line with no
3827 reason for rejecting RCPT. Now it says "Previous (cached) callout
3828 verification failure".
3830 3. There was an off-by-one bug in the queryprogram router. An over-long
3831 return line was truncated at 256 instead of 255 characters, thereby
3832 overflowing its buffer with the terminating zero. As well as fixing this, I
3833 have increased the buffer size to 1024 (and made a note to document this).
3835 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3836 when Exim is waiting for an SMTP response from a remote server, Exim
3837 restarts its select() call on the socket, thereby resetting its timeout.
3838 This is not a problem when such interrupts are rare. Somebody set up a cron
3839 job to run exiwhat every 2 minutes, which is less than the normal select()
3840 timeout (5 or 10 minutes). This meant that the select() timeout never
3841 kicked in because it was always reset. I have fixed this by comparing the
3842 time when an interrupt arrives with the time at the start of the first call
3843 to select(). If more time than the timeout has elapsed, the interrupt is
3844 treated as a timeout.
3846 5. Some internal re-factoring in preparation for the addition of Sieve
3847 extensions (by MH). In particular, the "personal" test is moved to a
3848 separate function, and given an option for scanning Cc: and Bcc: (which is
3849 not set for Exim filters).
3851 6. When Exim created an email address using the login of the caller as the
3852 local part (e.g. when creating a From: or Sender: header line), it was not
3853 quoting the local part when it contained special characters such as @.
3855 7. Installed new OpenBSD configuration files.
3857 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3858 try to make them clearer.
3860 9. Callout options, other than the timeout value, were being ignored when
3861 verifying sender addresses in header lines. For example, when using
3863 verify = header_sender/callout=no_cache
3865 the cache was (incorrectly) being used.
3867 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3868 only the Cygwin environment.
3870 11. When return_path_on_delivery was set as a log selector, if different remote
3871 addresses in the same message used different return paths and parallel
3872 remote delivery occurred, the wrong values would sometimes be logged.
3873 (Whenever a remote delivery process finished, the return path value from
3874 the most recently started remote delivery process was logged.)
3876 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3877 lines when AUTH and/or TLS are in use. This is the "received protocol"
3878 field. Exim used to use "asmtp" for authenticated SMTP, without any
3879 indication (in the protocol name) for TLS use. Now it follows the RFC and
3880 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3881 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3882 names appear in log lines as well as in Received: header lines.
3884 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3885 extensions, and comparison tests, and to fix some bugs.
3887 14. Changes to the "personal" filter test:
3889 (1) The test was buggy in that it was just doing the equivalent of
3890 "contains" tests on header lines. For example, if a user's address was
3891 anne@some.where, the "personal" test would incorrectly be true for
3893 To: susanne@some.where
3895 This test is now done by extracting each address from the header in turn,
3896 and checking the entire address. Other tests that are part of "personal"
3897 are now done using regular expressions (for example, to check local parts
3898 of addresses in From: header lines).
3900 (2) The list of non-personal local parts in From: addresses has been
3901 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3902 taken from the Sieve specification recommendations.
3904 (3) If the message contains any header line starting with "List-" it is
3905 treated as non-personal.
3907 (4) The test for "circular" in the Subject: header line has been removed
3908 because it now seems ill-conceived.
3910 15. Minor typos in src/EDITME comments corrected.
3912 16. Installed latest exipick from John Jetmore.
3914 17. If headers_add on a router specified a text string that was too long for
3915 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3916 of string_sprintf() is now avoided.
3918 18. $message_body_size was not set (it was always zero) when running the DATA
3919 ACL and the local_scan() function.
3921 19. For the "mail" command in an Exim filter, no default was being set for
3922 the once_repeat time, causing a random time value to be used if "once" was
3923 specified. (If the value happened to be <= 0, no repeat happened.) The
3924 default is now 0s, meaning "never repeat". The "vacation" command was OK
3925 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3926 (I found it when inspecting the code).
3928 20. There is now an overall timeout for performing a callout verification. It
3929 defaults to 4 times the callout timeout, which applies to individual SMTP
3930 commands during the callout. The overall timeout applies when there is more
3931 than one host that can be tried. The timeout is checked before trying the
3932 next host. This prevents very long delays if there are a large number of
3933 hosts and all are timing out (e.g. when the network connections are timing
3934 out). The value of the overall timeout can be changed by specifying an
3935 additional sub-option for "callout", called "maxwait". For example:
3937 verify = sender/callout=5s,maxwait=20s
3939 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3940 to the end before writing, but this should make it even safer).
3942 22. Exim was forgetting that it had advertised PIPELINING for the second and
3943 subsequent messages on an SMTP connection. It was also not resetting its
3944 memory on STARTTLS and an internal HELO.
3946 23. When Exim logs an SMTP synchronization error within a session, it now
3947 records whether PIPELINING has been advertised or not.
3949 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3950 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3951 rather than long int.
3953 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3955 26. Added the never_mail option to autoreply.
3961 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3962 crash if the getsockname() call failed; this can happen if a connection is
3963 closed very soon after it is established. The problem was simply in the
3964 order in which certain operations were done, causing Exim to try to write
3965 to the SMTP stream before it had set up the file descriptor. The bug has
3966 been fixed by making things happen in the correct order.
3972 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3973 before the connection was closed, thus losing the rejection response.
3975 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3976 some early Solaris releases, but causes trouble in current releases where
3977 socklen_t is defined.
3979 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3982 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3985 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3986 that releasing the top of it at the end releases what was used for sub-
3987 expansions (unless the block got too big). However, discard this block if
3988 the first thing is a variable or header, so that we can use its block when
3989 it is dynamic (useful for very large $message_headers, for example).
3991 6. Lookups now cache *every* query, not just the most recent. A new, separate
3992 store pool is used for this. It can be recovered when all lookup caches are
3993 flushed. Lookups now release memory at the end of their result strings.
3994 This has involved some general refactoring of the lookup sources.
3996 7. Some code has been added to the store_xxx() functions to reduce the amount
3997 of flapping under certain conditions.
3999 8. log_incoming_interface used to affect only the <= reception log lines. Now
4000 it causes the local interface and port to be added to several more SMTP log
4001 lines, for example "SMTP connection from", and rejection lines.
4003 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4005 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4007 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4008 could be overwritten at the end of the current message (or the start of a
4009 new message if it was set in a HELO ACL). The value is now preserved for
4010 the duration of the SMTP connection.
4012 12. If a transport had a headers_rewrite setting, and a matching header line
4013 contained an unqualified address, that address was qualified, even if it
4014 did not match any rewriting rules. The underlying bug was that the values
4015 of the flags that permit the existence of unqualified sender and recipient
4016 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4017 non-local messages, and by -bnq for local messages) were not being
4018 preserved with the message after it was received.
4020 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4021 "next input=" as part of the text comprising the host identity instead of
4022 the correct text. The code was using the same buffer for two different
4023 strings. However, depending on which order the printing function evaluated
4024 its arguments, the bug did not always show up. Under Linux, for example, my
4025 test suite worked just fine.
4027 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4028 doesn't work with some older versions of Perl. It has been changed to "my",
4029 which in any case is probably the better facility to use.
4031 15. A really picky compiler found some instances of statements for creating
4032 error messages that either had too many or two few arguments for the format
4035 16. The size of the buffer for calls to the DNS resolver has been increased
4036 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4037 for addresses that have a lot of PTR records. This alleviates a problem; it
4038 does not fully solve it.
4040 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4041 buffer now truncates the list and logs the incident, which is the same
4042 action as happens when Exim is looking up a host name and its aliases.
4043 Previously in this situation something unpredictable would happen;
4044 sometimes it was "internal error: store_reset failed".
4046 18. If a server dropped the connection unexpectedly when an Exim client was
4047 using GnuTLS and trying to read a response, the client delivery process
4048 crashed while trying to generate an error log message.
4050 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4051 string, for example:
4053 warn message = H1: something\nH2: something
4055 the text was added as a single header line from Exim's point of view
4056 though it ended up OK in the delivered message. However, searching for the
4057 second and subsequent header lines using $h_h2: did not work. This has been
4058 fixed. Similarly, if a system filter added multiple headers in this way,
4059 the routers could not see them.
4061 20. Expanded the error message when iplsearch is called with an invalid key to
4062 suggest using net-iplsearch in a host list.
4064 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4065 ACLs are no longer actually imposed (and a message to that effect is
4068 22. If a "gecos" field in a passwd entry contained escaped characters, in
4069 particular, if it contained a \" sequence, Exim got it wrong when building
4070 a From: or a Sender: header from that name. A second bug also caused
4071 incorrect handling when an unquoted " was present following a character
4072 that needed quoting.
4074 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4075 was not being matched caselessly.
4077 24. Arranged for all hyphens in the exim.8 source to be escaped with
4080 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4081 properly. Recipient callout cache records were still being keyed to include
4082 the sender, even when use_sender was set false. This led to far more
4083 callouts that were necessary. The sender is no longer included in the key
4084 when use_sender is false.
4086 26. Added "control = submission" modifier to ACLs.
4088 27. Added the ${base62d: operator to decode base 62 numbers.
4090 28. dnsdb lookups can now access SRV records.
4092 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4093 the configuration file.
4095 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4096 (-v) mode. This makes the output for a verbose queue run more intelligible.
4098 31. Added a use_postmaster feature to recipient callouts.
4100 32. Added the $body_zerocount variable, containing the number of binary zero
4101 bytes in the message body.
4103 33. The time of last modification of the "new" subdirectory is now used as the
4104 "mailbox time last read" when there is a quota error for a maildir
4107 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4109 35. Added +ignore_unknown as a special item in host lists.
4111 36. Code for decoding IPv6 addresses in host lists is now included, even if
4112 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4113 address was recognized as an IP address, but was then not correctly decoded
4114 into binary, causing unexpected and incorrect effects when compared with
4121 1. Very minor rewording of debugging text in manualroute to say "list of
4122 hosts" instead of "hostlist".
4124 2. If verify=header_syntax was set, and a header line with an unqualified
4125 address (no domain) and a large number of spaces between the end of the
4126 name and the colon was received, the reception process suffered a buffer
4127 overflow, and (when I tested it) crashed. This was caused by some obsolete
4128 code that should have been removed. The fix is to remove it!
4130 3. When running in the test harness, delay a bit after writing a bounce
4131 message to get a bit more predictability in the log output.
4133 4. Added a call to search_tidyup() just before forking a reception process. In
4134 theory, someone could use a lookup in the expansion of smtp_accept_max_
4135 per_host which, without the tidyup, could leave open a database connection.
4137 5. Added the variables $recipient_data and $sender_data which get set from a
4138 lookup success in an ACL "recipients" or "senders" condition, or a router
4139 "senders" option, similar to $domain_data and $local_part_data.
4141 6. Moved the writing of debug_print from before to after the "senders" test
4144 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4145 problems for message scanning, either using a data ACL, or using
4146 local_scan() because the Received: header was not generated till after they
4147 were called (in order to set the time as the time of reception completion).
4148 I have revised the way this works. The header is now generated after the
4149 body is received, but before the ACL or local_scan() are called. After they
4150 are run, the timestamp in the header is updated.
4156 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4157 before starting a queue runner without re-exec. This happened only when
4158 deliver_drop_privilege was set or when the Exim user was set to root. The
4159 effect of the bug was that timeouts during subsequent deliveries caused
4160 crashes instead of being properly handled. The handler is now left at its
4161 default (and expected) setting.
4163 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4164 message, again when deliver_drop_privilege is set or Exim is run as root.
4165 The bug described in (1) was not present in this case, but the tidying up
4166 of the other signals was missing. I have made the two cases consistent.
4168 3. The ignore_target_hosts setting on a manualroute router was being ignored
4169 for hosts that were looked up using the /MX notation.
4171 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4174 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4175 operated on the sender address. After changing the $sender_address to <>
4176 for the sender address verify, Exim was re-instated it as the original
4177 (before rewriting) address, but remembering that it had rewritten it, so it
4178 wasn't rewriting it again. This bug also had the effect of breaking the
4179 sender address verification caching when the sender address was rewritten.
4181 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4182 This has been changed so that if the ip literal address matches
4183 ignore_target_hosts, the router declines.
4185 7. Added expansion conditions match_domain, match_address, and match_local_
4186 part (NOT match_host).
4188 8. The placeholder for the Received: header didn't have a length field set.
4190 9. Added code to Exim itself and to exim_lock to test for a specific race
4191 condition that could lead to file corruption when using MBX delivery. The
4192 issue is with the lockfile that is created in /tmp. If this file is removed
4193 after a process has opened it but before that process has acquired a lock,
4194 there is the potential for a second process to recreate the file and also
4195 acquire a lock. This could lead to two Exim processes writing to the file
4196 at the same time. The added code performs the same test as UW imapd; it
4197 checks after acquiring the lock that its file descriptor still refers to
4198 the same named file.
4200 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4201 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4204 11. Added the smtp_active_hostname option. If used, this will typically be made
4205 to depend on the incoming interface address. Because $interface_address is
4206 not set up until the daemon has forked a reception process, error responses
4207 that can happen earlier (such as "too many connections") no longer contain
4210 12. If an expansion in a condition on a "warn" statement fails because a lookup
4211 defers, the "warn" statement is abandoned, and the next ACL statement is
4212 processed. Previously this caused the whole ACL to be aborted.
4214 13. Added the iplsearch lookup type.
4216 14. Added ident_timeout as a log selector.
4218 15. Added tls_certificate_verified as a log selector.
4220 16. Added a global option tls_require_ciphers (compare the smtp transport
4221 option of the same name). This controls incoming TLS connections.
4223 17. I finally figured out how to make tls_require_ciphers do a similar thing
4224 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4225 before starting the TLS session.
4227 18. Tabs are now shown as \t in -bP output.
4229 19. If the log selector return_path_on_delivery was set, Exim crashed when
4230 bouncing a message because it had too many Received: header lines.
4232 20. If two routers both had headers_remove settings, and the first one included
4233 a superfluous trailing colon, the final name in the first list and the
4234 first name in the second list were incorrectly joined into one item (with a
4235 colon in the middle).
4241 1. Added -C and -D options to the exinext utility, mainly to make it easier
4242 to include in the automated testing, but these could be helpful when
4243 multiple configurations are in use.
4245 2. The exinext utility was not formatting the output nicely when there was
4246 an alternate port involved in the retry record key, nor when there was a
4247 message id as well (for retries that were specific to a specific message
4248 and a specific host). It was also confused by IPv6 addresses, because of
4249 the additional colons they contain. I have fixed the IPv4 problem, and
4250 patched it up to do a reasonable job for IPv6.
4252 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4253 delivery, the log line now contains "pipelined" if PIPELINING was used.
4255 4. An SMTP transport process used to panic and die if the bind() call to set
4256 an explicit outgoing interface failed. This has been changed; it is now
4257 treated in the same way as a connect() failure.
4259 5. A reference to $sender_host_name in the part of a conditional expansion
4260 that was being skipped was still causing a DNS lookup. This no longer
4263 6. The def: expansion condition was not recognizing references to header lines
4264 that used bh_ and bheader_.
4266 7. Added the _cache feature to named lists.
4268 8. The code for checking quota_filecount in the appendfile transport was
4269 allowing one more file than it should have been.
4271 9. For compatibility with Sendmail, the command line option
4279 and sets the incoming protocol and host name (for trusted callers). The
4280 host name and its colon can be omitted when only the protocol is to be set.
4281 Note the Exim already has two private options, -pd and -ps, that refer to
4282 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4283 "s", but I don't think that's a major issue.
4285 10. A number of refactoring changes to the code, none of which should affect
4288 (a) The number of logging options was getting close to filling up the
4289 32-bit word that was used as a bit map. I have split them into two classes:
4290 those that are passed in the argument to log_write(), and those that are
4291 only ever tested independently outside of that function. These are now in
4292 separate 32-bit words, so there is plenty of room for expansion again.
4293 There is no change in the user interface or the logging behaviour.
4295 (b) When building, for example, log lines, the code previously used a
4296 macro that called string_cat() twice, in order to add two strings. This is
4297 not really sufficiently general. Furthermore, there was one instance where
4298 it was actually wrong because one of the argument was used twice, and in
4299 one call a function was used. (As it happened, calling the function twice
4300 did not affect the overall behaviour.) The macro has been replaced by a
4301 function that can join an arbitrary number of extra strings onto a growing
4304 (c) The code for expansion conditions now uses a table and a binary chop
4305 instead of a serial search (which was left over from when there were very
4306 few conditions). Also, it now recognizes conditions like "pam" even when
4307 the relevant support is not compiled in: a suitably worded error message is
4308 given if an attempt is made to use such a condition.
4310 11. Added ${time_interval:xxxxx}.
4312 12. A bug was causing one of the ddress fields not to be passed back correctly
4313 from remote delivery subprocesses. The field in question was not being
4314 subsequently used, so this caused to problems in practice.
4316 13. Added new log selectors queue_time and deliver_time.
4318 14. Might have fixed a bug in maildirsizefile handling that threw up
4319 "unexpected character" debug warnings, and recalculated the data
4320 unnecessarily. In any case, I expanded the warning message to give more
4323 15. Added the message "Restricted characters in address" to the statements in
4324 the default ACL that block characters like @ and % in local parts.
4326 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4327 Three changes have been made:
4329 (a) There was a serious bug; a negative response to MAIL caused the whole
4330 recipient domain to be cached as invalid, thereby blocking all messages
4331 to all local parts at the same domain, from all senders. This bug has
4332 been fixed. The domain is no longer cached after a negative response to
4333 MAIL if the sender used is not empty.
4335 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4338 (c) A new callout option, "use_sender" has been added for people who want
4339 the modified behaviour.
4345 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4348 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4349 indeed breaks things for older releases.
4351 3. Added additional logging to the case where there is a problem reading data
4352 from a filter that is running in a subprocess using a pipe, in order to
4353 try to track down a specific problem.
4355 4. Testing facility fudge: when running in the test harness and attempting
4356 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4357 getting "No route to host". Convert this to a timeout.
4359 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4362 6. Some OS don't have socklen_t but use size_t instead. This affects the
4363 fifth argument of getsockopt() amongst other things. This is now
4364 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4365 can be set for individual OS. I have set it for SunOS5, OSF1, and
4366 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4367 some earlier ones do not.
4369 7. Change 4.30/15 was not doing the test caselessly.
4371 8. The standard form for an IPv6 address literal was being rejected by address
4372 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4373 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4374 this, as well as the form without the "IPv6" on the front (but only when
4375 address literals are enabled, of course).
4377 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4379 10. Exim crashed if a message with an empty sender address specified by -f
4380 encountered a router with an errors_to setting. This could be provoked only
4381 by a command such as
4385 where an empty string was supplied; "<>" did not hit this bug.
4387 11. Installed PCRE release 4.5.
4389 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4390 remained set. It is now erased.
4392 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4393 times from message ids (which are base 36 rather than the normal 62).
4395 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4396 were being counted as actual protocol errors, and logged if the log
4397 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4398 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4399 and DATA following a set of rejected RCPTs do not count as protocol errors.
4400 In other words, Exim assumes they were pipelined, though this may not
4401 actually be the case. Of course, in all cases the client gets an
4402 appropriate error code.
4404 15. If a lookup fails in an ACL condition, a message about the failure may
4405 be available; it is used if testing the ACL cannot continue, because most
4406 such messages specify what the cause of the deferral is. However, some
4407 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4408 that caused an old message to be retained and used if a later statement
4409 caused a defer, replacing the real cause of the deferral.
4411 16. If an IP address had so many PTR records that the DNS lookup buffer
4412 was not large enough to hold them, Exim could crash while trying to process
4413 the truncated data. It now detects and logs this case.
4415 17. Further to 4.21/58, another change has been made: if (and only if) the
4416 first line of a message (the first header line) ends with CRLF, a bare LF
4417 in a subsequent header line has a space inserted after it, so as not to
4418 terminate the header.
4420 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4421 unnecessarily, used atoi() instead of strtol(), and didn't check the
4422 termination when getting file sizes from file names by regex.
4424 19. Completely re-implemented the support for maildirsize files, in the light
4425 of a number of problems with the previous contributed implementation
4426 (4.30/29). In particular:
4428 . If the quota is zero, the maildirsize file is maintained, but no quota is
4431 . If the maildir directory does not exist, it is created before any attempt
4432 to write a maildirsize file.
4434 . The quota value in the file is just a cache; if the quota is changed in
4435 the transport, the new value overrides.
4437 . A regular expression is available for excluding directories from the
4440 20. The autoreply transport checks the characters in options that define the
4441 message's headers; it allows continued headers, but it was checking with
4442 isspace() after an embedded newline instead of explicitly looking for a
4445 21. If all the "regular" hosts to which an address was routed had passed their
4446 expiry times, and had not reached their retry times, the address was
4447 bounced, even if fallback hosts were defined. Now Exim should go on to try
4450 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4451 equivalent code in the SMTP transport. Some hosts send humungous responses
4452 to HELO/EHLO, more than 1024 it seems.
4454 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4455 gives compiler warnings in some environments. I've now done it "properly",
4458 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4459 (because of problems with the built-in one) was declared to return uschar *
4460 instead of char *, causing compiler failure.
4462 25. Fixed a file descriptor leak when processing alias/forward files.
4464 26. Fixed a minor format string issue in dbfn.c.
4466 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4468 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4469 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4472 29. When a sender address is verified, it is cached, to save repeating the test
4473 when there is more than one recipient in a message. However, when the
4474 verification involves a callout, it is possible for different callout
4475 options to be set for different recipients. It is too complicated to keep
4476 track of this in the cache, so now Exim always runs a verification when a
4477 callout is required, relying on the callout cache for the optimization.
4478 The overhead is duplication of the address routing, but this should not be
4481 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4482 to be verified with callout=postmaster, and the main callout worked but the
4483 postmaster check failed, the verification correctly failed. However, if a
4484 subsequent RCPT command asked for sender verification *without* the
4485 postmaster check, incorrect caching caused this verification also to fail,
4488 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4489 it was not caching the DNS options (qualify_single, search_parents) that
4490 were used when the lookup failed. A subsequent lookup with different
4491 options therefore always gave the same answer, though there were cases
4492 where it should not have. (Example: a "domains = !$mx_any" option on a
4493 dnslookup router: the "domains" option is always processed without any
4494 widening, but the router might have qualify_single set.) Now Exim uses the
4495 cached value only when the same options are set.
4497 32. Added John Jetmore's "exipick" utility to the distribution.
4499 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4500 than a timeout (e.g. a certificate is required, and is not provided), an
4501 Exim server now closes the connection immediately. Previously it waited for
4502 the client to close - but if the client is SSL, it seems that they each
4503 wait for each other, leading to a delay before one of them times out.
4505 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4506 maintained 0.8.x compatibility because I don't think many are using it, and
4507 it is clearly obsolete.
4509 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4512 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4513 client certificate was expired. A simple patch fixes this, though I don't
4514 understand the full logic of why the verify callback is called multiple
4517 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4518 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4519 which causes problems with some clients (such as the Certicom SSL Plus
4520 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4521 disables the coutermeasure allowing Eudora to connect."
4523 38. Exim was not checking that a write() to a log file succeeded. This could
4524 lead to Bad Things if a log got too big, in particular if it hit a file
4525 size limit. Exim now panics and dies if it cannot write to a log file, just
4526 as it does if it cannot open a log file.
4528 39. Modified OS/Makefile-Linux so that it now contains
4530 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4532 The two -D definitions ensure that Exim is compiled with large file
4533 support, which makes it possible to handle log files that are bigger than
4536 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4537 instance) a domain was checked against a named list that involved a lookup,
4538 causing $domain_data to be set, then another domain was checked against the
4539 same list, then the first domain was re-checked, the value of $domain_data
4540 after the final check could be wrong. In particular, if the second check
4541 failed, it could be set empty. This bug probably also applied to
4544 41. The strip_trailing_dot option was not being applied to the address given
4545 with the -f command-line option.
4547 42. The code for reading a message's header from the spool was incrementing
4548 $received_count, but never initializing it. This meant that the value was
4549 incorrect (doubled) while delivering a message in the same process in which
4550 it was received. In the most common configuration of Exim, this never
4551 happens - a fresh exec is done - but it can happen when
4552 deliver_drop_privilege is set.
4554 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4555 it now includes up to 150 characters of the unexpected data in the log
4558 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4559 and building data strings. The size of both of these buffers was 10 000
4560 bytes - far larger than anybody would *ever* want, thought I. Needless to
4561 say, somebody hit the limit. I have increased the maximum line length to
4562 20 000 and the maximum data length of concatenated lines to 100 000. I have
4563 also fixed two bugs, because there was no checking on these buffers. Tsk,
4564 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4565 buffer is too small.
4567 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4568 lsearch lookups. Now it does.
4570 46. When parsing a route_list item in a manualroute router, a fixed-length
4571 buffer was used for the list of hosts. I made this 1024 bytes long,
4572 thinking that nobody would ever have a list of hosts that long. Wrong.
4573 Somebody had a whole pile of complicated expansion conditions, and the
4574 string was silently truncated, leading to an expansion error. It turns out
4575 that it is easier to change to an unlimited length (owing to other changes
4576 that have happened since this code was originally written) than to build
4577 structure for giving a limitation error. The length of the item that
4578 expands into the list of hosts is now unlimited.
4580 47. The lsearch lookup could not handle data where the length of text line was
4581 more than 4095 characters. Such lines were truncated, leading to shortened
4582 data being returned. It should now handle lines of any length.
4584 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4585 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4588 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4589 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4590 no longer happens in comment lines. A list of replacements is now placed
4591 at the head of all of the source files, except those whose only change is
4592 to replace PERL_COMMAND in the very first #! line.
4594 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4595 messages on the queue, with a bottom-up merge sort, using code contributed
4596 by Michael Haardt. This should make operations like -bp somewhat faster on
4597 large queues. It won't affect queue runners, except when queue_run_in_order
4600 51. Installed eximstats 1.31 in the distribution.
4602 52. Added support for SRV lookups to the dnslookup router.
4604 53. If an ACL referred to $message_body or $message_body_end, the value was not
4605 reset for any messages that followed in the same SMTP session.
4607 54. The store-handling optimization for building very long strings was not
4608 differentiating between the different store pools. I don't think this
4609 actually made any difference in practice, but I've tidied it.
4611 55. While running the routers to verify a sender address, $sender_address
4612 was still set to the sender address. This is wrong, because when routing to
4613 send a bounce to the sender, it would be empty. Therefore, I have changed
4614 it so that, while verifying a sender address, $sender_address is set to <>.
4615 (There is no change to what happens when verifying a recipient address.)
4617 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4618 target A or AAAA records (if not already returned) without resetting the
4619 qualify_single or search_parents options of the DNS resolver. These are
4620 inappropriate in this case because the targets of MX and SRV records must
4621 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4622 target that, when qualified, matched something in the local domain. These
4623 two options are now turned off when doing these lookups.
4625 57. It seems that at least some releases of Reiserfs (which does not have the
4626 concept of a fixed number of inodes) returns zero and not -1 for the
4627 number of available inodes. This interacted badly with check_spool_inodes,
4628 which assumed that -1 was the "no such thing" setting. What I have done is
4629 to check that the total number of inodes is greater than zero before doing
4630 the test of how many are available.
4632 58. When a "warn" ACL statement has a log_message modifier, the message is
4633 remembered, and not repeated. This is to avoid a lot of repetition when a
4634 message has many recipients that cause the same warning to be written.
4635 Howewer, Exim was preserving the list of already written lines for an
4636 entire SMTP session, which doesn't seem right. The memory is now reset if a
4637 new message is started.
4639 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4640 debugging output unless log_rewrite was also set.
4642 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4643 of (int)(handle) when we know that handle contains (void *)(-1).
4645 61. The Exim daemon panic-logs an error return when it closes the incoming
4646 connection. However "connection reset by peer" seems to be common, and
4647 isn't really an error worthy of noting specially, so that particular error
4650 62. When Exim is trying to find all the local interfaces, it used to panic and
4651 die if the ioctl to get the interface flags failed. However, it seems that
4652 on at least one OS (Solaris 9) it is possible to have an interface that is
4653 included in the list of interfaces, but for which you get a failure error
4654 for this call. This happens when the interface is not "plumbed" into a
4655 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4656 failure of the "get flags" call assumes that the interface is down.
4658 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4659 makes life easier for people who are doing arithmetic on fields extracted
4660 from dates, where you often get leading zeros that should not be
4661 interpreted as octal.
4663 64. Added qualify_domain to the redirect router, to override the global
4666 65. If a pathologically long header line contained very many addresses (the
4667 report of this problem mentioned 10 000) and each of them was rewritten,
4668 Exim could use up a very large amount of memory. (It kept on making new
4669 copies of the header line as it rewrote, and never released the old ones.)
4670 At the expense of a bit more processing, the header rewriting function has
4671 been changed so that it no longer eats memory in this way.
4673 66. The generation of the Received: header has been moved from the time that a
4674 message starts to be received, to the time that it finishes. The timestamp
4675 in the Received: header should now be very close to that of the <= log
4676 line. There are two side-effects of this change:
4678 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4679 logged header lines no longer include the local Received: line, because
4680 it has not yet been created. The same applies to a copy of the message
4681 that is returned to a non-SMTP sender when a message is rejected.
4683 (b) When a filter file is tested using -bf, no additional Received: header
4684 is added to the test message. After some thought, I decided that this
4687 This change does not affect the value of $received_for. It is still set
4688 after address rewriting, but before local_scan() is called.
4690 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4692 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4693 gave an unhelpful panic error message, and a defer error. I have managed to
4694 change this behaviour so that it now rejects any supplied certificate,
4695 which seems right, as the list of acceptable certificates is empty.
4697 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4698 gave an unhelpful defer error. I have not managed to make this reject any
4699 supplied certificates, but the error message it gives is "no certificate
4700 supplied", which is not helpful.
4702 70. exigrep's output now also includes lines that are not associated with any
4703 message, but which match the given pattern. Implemented by a patch from
4704 Martin Sluka, which also tidied up the Perl a bit.
4706 71. Recipient callout verification, like sender verification, was using <> in
4707 the MAIL FROM command. This isn't really the right thing, since the actual
4708 sender may affect whether the remote host accepts the recipient or not. I
4709 have changed it to use the actual sender in the callout; this means that
4710 the cache record is now keyed on a recipient/sender pair, not just the
4711 recipient address. There doesn't seem to be a real danger of callout loops,
4712 since a callout by the remote host to check the sender would use <>.
4713 [SEE ABOVE: changed after hitting problems.]
4715 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4716 temporary errors. However, in the case of such a code being given after
4717 the end of a data transmission (i.e. after ".") Exim was failing to write
4718 a retry record for the message. (Yes, there was some broken host that was
4719 actually sending 8xx at this point.)
4721 73. An unknown lookup type in a host list could cause Exim to panic-die when
4722 the list was checked. (An example that provoked this was putting <; in the
4723 middle of a list instead of at the start.) If this happened during a DATA
4724 ACL check, a -D file could be left lying around. This kind of configuration
4725 error no longer causes Exim to die; instead it causes a defer errror. The
4726 incident is still logged to the main and panic logs.
4728 74. Buglet left over from Exim 3 conversion. The message "too many messages
4729 in one connection" was written to the rejectlog but not the mainlog, except
4730 when address rewriting (yes!) was being logged.
4732 75. Added write_rejectlog option.
4734 76. When a system filter was run not as root (that is, when system_filter_user
4735 was set), the values of the $n variables were not being returned to the
4736 main process; thus, they were not subsequently available in the $sn
4739 77. Added +return_path_on_delivery log selector.
4741 78. A connection timeout was being treated differently from recipients deferred
4742 when testing hosts_max_try with a message that was older than the host's
4743 retry timeout. (The host should not be counted, thus allowing all hosts to
4744 be tried at least once before bouncing.) This may have been the cause of an
4745 occasionally reported bug whereby a message would remain on the queue
4746 longer than the retry timeout, but would be bounced if a delivery was
4747 forced. I say "may" because I never totally pinned down the problem;
4748 setting up timeout/retry tests is difficult. See also the next item.
4750 79. The ultimate address timeout was not being applied to errors that involved
4751 a combination of host plus message (for example, a timeout on a MAIL
4752 command). When an address resolved to a number of possible hosts, and they
4753 were not all tried for each delivery (e.g. because of hosts_max_try), a
4754 message could remain on the queue longer than the retry timeout.
4756 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4759 81. Fixed an obscure SMTP outgoing bug which required at least the following
4760 conditions: (a) there was another message waiting for the same server;
4761 (b) the server returned 5xx to all RCPT commands in the first message so
4762 that the message was not completed; (c) the server dropped the connection
4763 or gave a negative response to the RSET that Exim sends to abort the
4764 transaction. The observed case was a dropped connection after DATA that had
4765 been sent in pipelining mode. That is, the server had advertised PIPELINING
4766 but was not implementing it correctly. The effect of the bug was incorrect
4767 behaviour, such as trying another host, and this could lead to a crash.
4773 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4774 and daemon.c were passed as pointers to ints; they should have been
4775 pointers to socklen_t variables (which are typically unsigned ints).
4777 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4780 3. Fixed a really odd bug that affected only the testing scheme; patching a
4781 certain fixed string in the binary changed the value of another string that
4782 happened to be identical to the end of the original first string.
4784 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4785 name", it returns that address as the IP address. On some operating
4786 systems (e.g. Solaris), it also passes back the IP address string as the
4787 "host name". However, on others (e.g. Linux), it passes back an empty
4788 string. Exim wasn't checking for this, and was changing the host name to an
4789 empty string, assuming it had been canonicized.
4791 5. Although rare, it is permitted to have more than one PTR record for a given
4792 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4793 all the names associated with an address, because they do in Solaris.
4794 However, it seems that they do not in Linux for data that comes from the
4795 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4796 I found this out when I moved to a new Linux workstation and tried to run
4797 the Exim test suite.
4799 To get round this problem I have changed the code so that it now does its
4800 own call to the DNS to look up PTR records when searching for a host name.
4801 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4802 addresses that are only in /etc/hosts are still found.
4804 This behaviour is, however, controlled by an option called host_lookup_
4805 order, which defaults to "bydns:byaddr". If people want to use the other
4806 order, or indeed, just use one or the other means of lookup, they can
4807 specify it in this variable.
4809 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4810 some operating systems, this comes back from gethostbyaddr() as an empty
4811 string, and this is what Exim used to test for. However, it seems that in
4812 other systems, "." is yielded. Exim now tests for this case too.
4814 7. The values of check_spool_space and check_log_space are now held internally
4815 as a number of kilobytes instead of an absolute number of bytes. If a
4816 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4817 kilobyte. This means that much larger values can be stored.
4819 8. Exim monitor: an attempt to get the action menu when not actually pointing
4820 at a message produces an empty menu entitled "No message selected". This
4821 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4822 no entries in it ("Shell widget menu has zero width and/or height"). So I
4823 have added a single, blank menu entry in this case.
4825 9. Added ${quote_local_part.
4827 10. MIME decoding is now applied to the contents of Subject: header lines when
4830 11. Now that a reference to $sender_host_address automatically causes a reverse
4831 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4832 host lookup before query-style lookups in lists that might use this
4833 variable. This has therefore been abolished, and the "net-" prefix is no
4834 longer necessary for query-style lookups.
4836 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4837 have been a typo for LFLAGS, so it has been changed.
4839 13. The install script calls Exim with "-C /dev/null" in order to find the
4840 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4841 to be output. Howeve, since Exim outputs its version number before the
4842 error, it didn't break the script. It just looked ugly. I fixed this by
4843 always allowing "-C /dev/null" if the caller is root.
4845 14. Ignore overlarge ACL variable number when reading spool file - insurance
4846 against a later release with more variables having written the file.
4848 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4849 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4850 this, as well as the form without the "IPv6" on the front.
4852 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4853 OS/Makefile-Darwin file.
4855 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4856 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4858 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4859 variable. However, some OS use ints for inodes. I've added cast to long int
4860 to get rid of the compiler warning.
4862 19. I had forgotten to lock out "/../" in configuration file names when
4863 ALT_CONFIG_PREFIX was set.
4865 20. Routers used for verification do not need to specify transports. However,
4866 if such a router generated a host list, and callout was configured, Exim
4867 crashed, because it could not find a port number from the (non-existent)
4868 transport. It now assumes port 25 in this circumstance.
4870 21. Added the -t option to exigrep.
4872 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4873 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4874 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4875 them is set, LOOKUP_LSEARCH is forced.
4877 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4879 24. Added sender and host information to the "rejected by local_scan()" log
4880 line; previously there was no indication of these.
4882 25. Added .include_if_exists.
4884 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4885 Linux. It turns out that not all file systems support this. Apparently some
4886 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4887 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4888 not supported on the file descriptor, is now ignored when Exim is trying to
4889 sync a directory. This applies only to Linux.
4891 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4893 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4894 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4897 29. Added support for maildirsize files from supplied patch (modified a bit).
4899 30. The use of :fail: followed by an empty string could lead Exim to respond to
4900 sender verification failures with (e.g.):
4902 550 Verification failed for <xxx>
4903 550 Sender verify failed
4905 where the first response line was missing the '-' that indicates it is not
4906 the final line of the response.
4908 31. The loop for finding the name of the user that called Exim had a hardwired
4909 limit of 10; it now uses the value of finduser_retries, which is used for
4910 all other user lookups.
4912 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4915 33. Exim was neglecting to zero errno before one call of strtol() when
4916 expanding a string and expecting an integer value. On some systems this
4917 resulted in spurious "integer overflow" errors. Also, it was casting the
4918 result into an int without checking.
4920 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4921 did not work. The code looks as if it has *never* worked, though it appears
4922 to have been documented since at least releast 1.62. I have made it work.
4924 35. The "timeout_DNS" error in retry rules, also documented since at least
4925 1.62, also never worked. As it isn't clear exactly what this means, and
4926 clearly it isn't a major issue, I have abolished the feature by treating it
4927 as "timeout", and writing a warning to the main and panic logs.
4929 36. The display of retry rules for -brt wasn't always showing the error code
4932 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4933 timeout_connect_A, timeout_connect_MX.
4935 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4936 to the empty sender.
4938 39. The daemon was not analysing the content of -oX till after it had closed
4939 stderr and disconnected from the controlling terminal. This meant that any
4940 syntax errors were only noted on the panic log, and the return code from
4941 the command was 0. By re-arranging the code a little, I've made the
4942 decoding happen first, so such errors now appear on stderr, and the return
4943 code is 1. However, the actual setting up of the sockets still happens in
4944 the disconnected process, so errors there are still only recorded on the
4947 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4948 connections (as happens on some IP stacks) was logged at start up time as
4949 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4950 it from "IPv6 and IPv4", which means that two separate sockets are being
4953 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4954 says whether AF_INET or AF_INET6 was passed as an argument.
4956 42. Exiwhat output was messed up when time zones were included in log
4959 43. Exiwhat now gives more information about the daemon's listening ports,
4960 and whether -tls-on-connect was used.
4962 44. The "port" option of the smtp transport is now expanded.
4964 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4965 silently ignored. Now an error message is written to the main and panic
4968 46. There's a new ACL modifier called "logwrite" which writes to a log file
4969 as soon as it is encountered.
4971 47. Added $local_user_uid and $local_user_gid at routing time.
4973 48. Exim crashed when trying to verify a sender address that was being
4976 49. Exim was recognizing only a space character after ".include". It now also
4977 recognizes a tab character.
4979 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4980 extracting the relevant information from the specification. The man page no
4981 longer contains scrambled data for the -d option, and I've added a section
4982 at the front about calling Exim under different names.
4984 51. Added "extra_headers" argument to the "mail" command in filter files.
4986 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4989 53. Installed eximstats 1.29.
4991 54. Added transport_filter_timeout as a generic transport option.
4993 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4994 Cc: header lines. This was required by RFC 822, but it not required by RFC
4997 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4998 incoming messages that did not have them. Now it does so only if the
4999 message originates locally, that is, if there is no associated remote host
5000 address. When Resent- header lines are present, this applies to the Resent-
5001 lines rather than the non-Resent- lines.
5003 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5004 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5006 58. Messages for configuration errors now include the name of the main
5007 configuration file - useful now that there may be more than one file in a
5008 list (.included file names were always shown).
5010 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5011 for those rare installations that do not start the daemon as root or run it
5012 setuid root. I've cut out the call to initgroups() if the daemon is not
5015 60. The Exim user and group can now be bound into the binary as text strings
5016 that are looked up at the start of Exim's processing.
5018 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5020 62. Added $mailstore_basename variable.
5022 63. Installed patch to sieve.c from Michael Haardt.
5024 64. When Exim failed to open the panic log after failing to open the main log,
5025 the original message it was trying to log was written to stderr and debug
5026 output, but if they were not available (the usual case in production), it
5027 was lost. Now it is written to syslog before the two lines that record the
5028 failures to open the logs.
5030 65. Users' Exim filters run in subprocesses under the user's uid. It is
5031 possible for a "deliver" command or an alias in a "personal" command to
5032 provoke an address rewrite. If logging of address rewriting is configured,
5033 this fails because the process is not running as root or exim. There may be
5034 a better way of dealing with this, but for the moment (because 4.30 needs
5035 to be released), I have disabled address rewrite logging when running a
5036 filter in a non-root, non-exim process.
5042 1. The buildconfig auxiliary program wasn't quoting the value set for
5043 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5044 not defined. This bug was masked in 4.22 by the effect that was fixed in
5047 2. Some messages that were rejected after a message id was allocated were
5048 shown as "incomplete" by exigrep. It no longer does this for messages that
5049 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5051 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5052 have allow_domain_literals set, the ID did not get logged in the <= line.
5053 Domain literals are now always recognized in Message-ID: header lines.
5055 4. The first argument for a ${extract expansion item is the key name or field
5056 number. Leading and trailing spaces in this item were not being ignored,
5057 causing some misleading effects.
5059 5. When deliver_drop_privilege was set, single queue runner processes started
5060 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5061 same command in the process it spins off) were not dropping privilege.
5063 6. When the daemon running as "exim" started a queue runner, it always
5064 re-executed Exim in the spun-off process. This is a waste of effort when
5065 deliver_drop_privilege is set. The new process now just calls the
5066 queue-runner function directly.
5072 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5075 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5076 ignored. Though the use of -oP was forcing the writing of a pid file, it
5077 was always written to the default place.
5079 3. If the message "no IP address found for host xxxx" is generated during
5080 incoming verification, it is now followed by identification of the incoming
5081 connection (so you can more easily find what provoked it).
5083 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5085 5. Added some features to "harden" Exim a bit more against certain attacks:
5087 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5088 be put in Local/Makefile. This is like the never_users runtime option,
5089 but it cannot be overridden. The default setting is "root".
5091 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5092 prefix string with which any file named in a -C command line option
5095 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5096 is retained for -C and -D only if the caller of Exim is root. Without
5097 it, the exim user may also use -C and -D and retain privilege.
5099 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5100 command line option is disabled.
5102 6. Macro names set by the -D option must start with an upper case letter, just
5103 like macro names defined in the configuration file.
5105 7. Added "dereference=" facility to LDAP.
5107 8. Two instances of the typo "uknown" in the source files are fixed.
5109 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5110 the Configure-Makefile script screwed up while processing it.
5112 10. Incorporated PCRE 4.4.
5114 11. The SMTP synchronization check was not operating right at the start of an
5115 SMTP session. For example, it could not catch a HELO sent before the client
5116 waited for the greeting. There is now a check for outstanding input at the
5117 point when the greeting is written. Because of the duplex, asynchronous
5118 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5119 way, but not yet received, when the check is performed.
5121 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5122 on TCP/IP sockets, because this apparently causes some broken clients to
5125 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5126 unchanged) from the Cygwin maintainer.
5128 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5129 was supported instead of testing for mbx. Effectively a typo.
5131 15. The spa authenticator server code was not checking that the input it
5132 received was valid base64.
5134 16. The debug output line for the "set" modifier in ACLs was not showing the
5135 name of the variable that was being set.
5137 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5139 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5140 lookup on its own. Something else was needed to trigger the lookup. For
5141 example, a match in host_lookup or the need for a host name in a host list.
5142 Now, if $sender_host_name is referenced and the host name has not yet been
5143 looked up, a lookup is performed. If the lookup fails, the variable remains
5144 empty, and $host_lookup_failed is set to "1".
5146 19. Added "eqi" as a case-independent comparison operator.
5148 20. The saslauthd authentication condition could segfault if neither service
5149 nor realm was specified.
5151 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5152 error message that was logged was misleading, and incoming SMTP
5153 connections were dropped. The message is now more accurate, and temporary
5154 errors are given to SMTP connections.
5156 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5157 (except RSET) with a 421 error, until QUIT is received. However, it was
5158 failing to send a response to QUIT.
5160 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5161 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5162 ACL is now run after the helo_try_verify_hosts code.
5164 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5165 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5166 case-independent, so other case variants are also recognized). Apparently
5167 some systems use these upper case variants.
5169 25. If more than two messages were waiting for the same host, and a transport
5170 filter was specified for the transport, Exim sent two messages over the
5171 same TCP/IP connection, and then failed with "socket operation on non-
5172 socket" when it tried to send the third.
5174 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5176 27. The extern definition of crypt16() in expand.c was not being excluded when
5177 the OS had its own crypt16() function.
5179 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5180 as a preferred synonym for return_size_limit, both as an option and as an
5183 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5185 30. Changed the default configuration ACL to relax the local part checking rule
5186 for addresses that are not in any local domains. For these addresses,
5187 slashes and pipe symbols are allowed within local parts, but the sequence
5188 /../ is explicitly forbidden.
5190 31. SPA server authentication was not clearing the challenge buffer before
5193 32. log_message in a "warn" ACL statement was writing to the reject log as
5194 well as to the main log, which contradicts the documentation and doesn't
5195 seem right (because no rejection is happening). So I have stopped it.
5197 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5198 However, I am unable to do any testing of this.
5200 34. Fixed an infelicity in the appendfile transport. When checking directories
5201 for a mailbox, to see if any needed to be created, it was accidentally
5202 using path names with one or more superfluous leading slashes; tracing
5203 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5205 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5206 contents are added to the log line that is written for every discarded
5207 recipient. (Previously a log_message setting was ignored.)
5209 36. The ${quote: operator now quotes the string if it is empty.
5211 37. The install script runs exim in order to find its version number. If for
5212 some reason other than non-existence or emptiness, which it checks, it
5213 could not run './exim', it was installing it with an empty version number,
5214 i.e. as "exim-". This error state is now caught, and the installation is
5217 38. An argument was missing from the function that creates an error message
5218 when Exim fails to connect to the socket for saslauthd authentication.
5219 This could cause Exim to crash, or give a corrupted message.
5221 39. Added isip, isip4, and isip6 to ${if conditions.
5223 40. The ACL variables $acl_xx are now saved with the message, and can be
5224 accessed later in routers, transports, and filters.
5226 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5227 strings in the file are not string-expanded.
5229 42. If a MAIL command specified a SIZE value that was too large to fit into an
5230 int variable, the check against message_size_limit failed. Such values are
5231 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5232 day this will have to be increased, but I don't think I want to be around
5233 when emails are that large.
5240 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5241 iconv() is not standard in FreeBSD.
5243 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5244 IPv6 enabled. The observed symptom was a segmentation fault on return from
5245 the function os_common_find_running_interfaces() in src/os.c.
5247 3. In the check_special_case() function in daemon.c I had used "errno" as an
5248 argument name, which causes warnings on some systems. This was basically a
5249 typo, since it was named "eno" in the comments!
5251 4. The code that waits for the clock to tick (at a resolution of some fraction
5252 of a second) so as to ensure message-id uniqueness was always waiting for
5253 at least one whole tick, when it could have waited for less. [This is
5254 almost certainly not relevant at current processor speeds, where it is
5255 unlikely to ever wait at all. But we try to future-proof.]
5257 5. The function that sleeps for a time interval that includes fractions of a
5258 second contained a race. It did not block SIGALRM between setting the
5259 timer, and suspending (a couple of lines later). If the interval was short
5260 and the sigsuspend() was delayed until after it had expired, the suspension
5261 never ended. On busy systems this could lead to processes getting stuck for
5264 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5265 process, before it forks any delivery processes. The open lookup caching
5266 mechanism meant that the open file or database connection was passed into
5267 the delivery process. The problem was that delivery processes always tidy
5268 up cached lookup data. This could cause a problem for the next delivery
5269 process started by the queue runner, because the external queue runner
5270 process does not know about the closure. So the next delivery process
5271 still has data in the lookup cache. In the case of a file lookup, there was
5272 no problem because closing a file descriptor in a subprocess doesn't affect
5273 the parent. However, if the lookup was caching a connection to a database,
5274 the connection was closed, and the second delivery process was likely to
5275 see errors such as "PGSQL: query failed: server closed the connection
5276 unexpectedly". The problem has been fixed by closing all cached lookups
5277 in a queue runner before running a delivery process.
5279 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5280 seem to have the "const" qualifier which it has on other OS. I've
5283 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5284 *of the same type* (client or server) with the same public name that an
5285 error should be diagnosed.
5287 9. When Exim looked up a host name for an IP address, but failed to find the
5288 original IP address when looking up the host name (a safety check), it
5289 output the message "<ip address> does not match any IP for NULL", which was
5290 confusing, to say the least. The bug was that the host name should have
5291 appeared instead of "NULL".
5293 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5294 user that is built into the binary, and the -C or -D options is used, root
5295 privilege is dropped before the configuration file is read. In addition,
5296 logging is switched to stderr instead of the normal log files. If the
5297 configuration then re-defines the Exim user, the unprivileged environment
5298 is probably not what is expected, so Exim logs a panic warning message (but
5301 However, if deliver_drop_privilege is set, the unprivileged state may well
5302 be exactly what is intended, so the warning has been cut out in that case,
5303 and Exim is allowed to try to write to its normal log files.
5309 1. smtp_return_error_details was not giving details for temporary sender
5310 or receiver verification errors.
5312 2. Diagnose a configuration error if two authenticators have the same public
5315 3. Exim used not to create the message log file for a message until the first
5316 delivery attempt. This could be confusing when incoming messages were held
5317 for policy or load reasons. The message log file is now created at the time
5318 the message is received, and an initial "Received" line is written to it.
5320 4. The automatically generated man page for command line options had a minor
5321 bug that caused no ill effects; however, a more serious problem was that
5322 the procedure for building the man page automatically didn't always
5323 operate. Consequently, release 4.20 contains an out-of-date version. This
5324 shouldn't happen again.
5326 5. When building Exim with embedded Perl support, the script that builds the
5327 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5328 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5330 6. The freeze_tell option was not being used for messages that were frozen on
5331 arrival, either by an ACL or by local_scan().
5333 7. Added the smtp_incomplete_transaction log selector.
5335 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5336 was accepting AUTH without a new EHLO.
5338 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5339 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5342 10. Logging of TCP/IP connections (when configured) now happens in the main
5343 daemon process instead of the child process, so that the TCP/IP connection
5344 count is more accurate (but it can never be perfect).
5346 11. The use of "drop" in a nested ACL was not being handled correctly in the
5347 outer ACL. Now, if condition failure induced by the nested "drop" causes
5348 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5349 or "require"), the connection is dropped.
5351 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5352 that yield "discard" can now be used with an "accept" or a "discard" verb,
5353 but an error is generated for any others (because I can't see a useful way
5354 to define what should happen).
5356 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5357 are now processed in the same way as lines in the Exim configuration file.
5358 In particular, continuation lines are supported.
5360 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5362 15. Added -ti meaning -t -i.
5364 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5365 domains, and warn by logging if others are found.
5367 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5368 returned from GIFCONF when Exim is trying to find the list of interfaces on
5369 a host. The code in os.c has been modified to copy each ifreq to an aligned
5370 structure in all cases.
5372 Also, in some cases, the returned ifreq's were being copied to a 'struct
5373 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5374 means the last couple of bytes of an IPv6 address could be chopped if the
5375 ifreq contained only a normal sockaddr (14 bytes storage).
5377 18. Named domain lists were not supported in the hosts_treat_as_local option.
5378 An entry such as +xxxx was not recognized, and was treated as a literal
5381 19. Ensure that header lines added by a DATA ACL are included in the reject log
5382 if the ACL subsequently rejects the message.
5384 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5385 MD5 (which is deprecated).
5387 21. When testing a filter file using -bf, Exim was writing a message when it
5388 took the sender from a "From " line in the message, but it was not doing so
5389 when it took $return_path from a Return-Path: header line. It now does.
5391 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5392 with a valid header line field name (a series of printing characters
5393 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5395 23. Changed "disc" in the source to "disk" to conform to the documentation and
5396 the book and for uniformity.
5398 24. Ignore Sendmail's -Ooption=value command line item.
5400 25. When execve() failed while trying to run a command in a pipe transport,
5401 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5402 could be confused with a return value of 69 from the command itself. This
5403 has been changed to 127, the value the shell returns if it is asked to run
5404 a non-existent command. The wording for the related log line suggests a
5405 non-existent command as the problem.
5407 26. If received_header_text expands to an empty string, do not add a Received:
5408 header line to the message. (Well, it adds a token one on the spool, but
5409 marks it "old" so that it doesn't get used or transmitted.)
5411 27. Installed eximstats 1.28 (addition of -nt option).
5413 28. There was no check for failure on the call to getsockname() in the daemon
5414 code. This can fail if there is a shortage of resources on the system, with
5415 ENOMEM, for example. A temporary error is now given on failure.
5417 29. Contrary to the C standard, it seems that in some environments, the
5418 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5419 program. Exim now does this explicitly; it affects the formatting of
5420 timestamps using strftime().
5422 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5423 complaints. I've now initialized all the variables, to avoid this.
5425 32. Header lines added by a system filter were not being "seen" during
5426 transport-time rewrites.
5428 33. The info_callback() function passed to OpenSSL is set up with type void
5429 (*)(SSL *, int, int), as described somewhere. However, when calling the
5430 function (actually a macro) that sets it up, the type void(*)() is
5431 expected. I've put in a cast to prevent warnings from picky compilers.
5433 34. If a DNS black list lookup found a CNAME record, but there were no A
5434 records associated with the domain it pointed at, Exim crashed.
5436 35. If a DNS black list lookup returned more than one A record, Exim ignored
5437 all but the first. It now scans all returned addresses if a particular IP
5438 value is being sought. In this situation, the contents of the
5439 $dnslist_value variable are a list of all the addresses, separated by a
5442 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5443 to accept a host name and all its aliases if the forward lookup for any of
5444 them yielded the IP address of the incoming connection. Now it accepts only
5445 those names whose forward lookup yields the correct IP address. Any other
5446 names are discarded. This closes a loophole whereby a rogue DNS
5447 administrator could create reverse DNS records to break through a
5448 wildcarded host restriction in an ACL.
5450 37. If a user filter or a system filter that ran in a subprocess used any of
5451 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5452 the wrong values were passed to the pipe command ($thisaddress had the
5453 value of $0, $0 had the value of $1, etc). This bug was introduced by
5454 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5456 38. Improved the line breaking for long SMTP error messages from ACLs.
5457 Previously, if there was no break point between 40 and 75 characters, Exim
5458 left the rest of the message alone. Two changes have been made: (a) I've
5459 reduced the minimum length to 35 characters; (b) if it can't find a break
5460 point between 35 and 75 characters, it looks ahead and uses the first one
5461 that it finds. This may give the occasional overlong line, but at least the
5462 remaining text gets split now.
5464 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5465 file descriptors might be low, and that setting 1000 would always raise it.
5466 It turns out that in some environments, the limit is already over 1000 and
5467 that lowering it causes trouble. So now Exim takes care not to decrease it.
5469 40. When delivering a message, the value of $return_path is set to $sender_
5470 address at the start of routing (routers may change the value). By an
5471 oversight, this default was not being set up when an address was tested by
5472 -bt or -bv, which affected the outcome if any router or filter referred to
5475 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5476 log only when "message" or "log_message" are set. However, if one of the
5477 conditions was an address verification, or a call to a nested ACL, the
5478 messages generated by the underlying test were being passed through. This
5479 no longer happens. The underlying message is available in $acl_verify_
5480 message for both "message" and "log_message" expansions, so it can be
5481 passed through if needed.
5483 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5484 new expansion $bh_ to give the encoded byte string without charset
5485 translation. Translation happens only if iconv() is available; HAVE_ICONV
5486 indicates this at build time. HEADERS_CHARSET gives the charset to
5487 translate to; headers_charset can change it in the configuration, and
5488 "headers charset" can change it in an individual filter file.
5490 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5491 that creates RFC 2047 encoded "words" labels them as that charset instead
5492 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5493 expansion operator; (ii) when Exim creates a From: line for a local
5494 message; (iii) when a header line is rewritten to include a "phrase" part.
5496 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5497 buggy, causing it to skip the first lines of messages whose message ID
5498 ended in 'D'. This would not have bitten before Exim release 4.14, because
5499 message IDs were unlikely to end in 'D' before then. The effect was to have
5500 incorrect size information for certain domains.
5502 45. #include "config.h" was missing at the start of the crypt16.c module. This
5503 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5506 46. If there was a timeout during a "random" callout check, Exim treated it as
5507 a failure of the random address, and carried on sending RSET and the real
5508 address. If the delay was just some slowness somewhere, the response to the
5509 original RCPT would be taken as a response to RSET and so on, causing
5510 mayhem of various kinds.
5512 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5513 when I implemented it. It didn't allow for the fact that some option values
5514 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5515 the right test for positive values.
5517 48. Domain names in DNS records are case-independent. Exim always looks them up
5518 in lower case. Some resolvers return domain names in exactly the case they
5519 appear in the zone file, that is, they may contain uppercase letters. Not
5520 all resolvers do this - some return always lower case. Exim was treating a
5521 change of case by a resolver as a change of domain, similar to a widening
5522 of a domain abbreviation. This triggered its re-routing code and so it was
5523 trying to route what was effectively the same domain again. This normally
5524 caused routing to fail (because the router wouldn't handle the domain
5525 twice). Now Exim checks for this case specially, and just changes the
5526 casing of the domain that it ultimately uses when it transmits the message
5529 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5532 50. If a filter generated a file delivery with a non-absolute name (possible if
5533 no home directory exists for the router), the forbid_file option was not
5536 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5537 the existing equality matching.
5539 52. Exim was using ints instead of ino_t variables in some places where it was
5540 dealing with inode numbers.
5542 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5543 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5544 called TMPDIR, and if it finds it is different, it changes its value.
5546 54. The smtp_printf() function is now made available to local_scan() so
5547 additional output lines can be written before returning. There is also an
5548 smtp_fflush() function to enable the detection of a dropped connection.
5549 The variables smtp_input and smtp_batched_input are exported to
5552 55. Changed the default runtime configuration: the message "Unknown user"
5553 has been removed from the ACL, and instead placed on the localuser router,
5554 using the cannot_route_message feature. This means that any verification
5555 failures that generate their own messages won't get overridden. Similarly,
5556 the "Unrouteable address" message that was in the ACL for unverifiable
5557 relay addresses has also been removed.
5559 56. Added hosts_avoid_esmtp to the smtp transport.
5561 57. The exicyclog script was not checking for the esoteric option
5562 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5563 will work only if exicyclog is run under the appropriate euid.
5565 58. Following a discussion on the list, the rules by which Exim recognises line
5566 endings on incoming messages have been changed. The -dropcr and drop_cr
5567 options are now no-ops, retained only for backwards compatibility. The
5568 following line terminators are recognized: LF CRLF CR. However, special
5569 processing applies to CR:
5571 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5572 nor a local message in the state where . is a terminator.
5574 (ii) If a bare CR is encountered in a header line, an extra space is added
5575 after the line terminator so as not to end the header. The reasoning
5576 behind this is that bare CRs in header lines are most likely either
5577 to be mistakes, or people trying to play silly games.
5579 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5580 was being incorrectly given as 18 bytes larger than it should have been.
5581 This is a VOB (very old bug).
5583 60. This may never have affected anything current, but just in case it has:
5584 When the local host is found other than at the start of a list of hosts,
5585 the local host, those with the same MX, and any that follow, are discarded.
5586 When the list in question was part of a longer list of hosts, the following
5587 hosts (not currently being processed) were also being discarded. This no
5588 longer happens. I'm not sure if this situation could ever has previously
5591 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5594 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5595 header. This is something that is recommended in a new Internet Draft, and
5596 is something that is documented as being done by Sendmail. There are two
5597 possible values. For messages generated by the autoreply transport, Exim
5600 Auto-Submitted: auto-replied
5602 whereas for all other generated messages (e.g. bounces) it adds
5604 Auto-Submitted: auto-generated
5606 63. The "personal" condition in filters now includes a test for the
5607 Auto-Submitted: header. If it contains the string "auto-" the message it
5608 not considered personal.
5610 64. Added rcpt_include_affixes as a generic transport option.
5612 65. Added queue_only_override (default true).
5614 66. Added the syslog_duplication option.
5616 67. If what should have been the first header line of a message consisted of
5617 a space followed by a colon, Exim was mis-interpreting it as a header line.
5618 It isn't of course - it is syntactically invalid and should therefore be
5619 treated as the start of the message body. The misbehaviour could have
5620 caused a number of strange effects, including loss of data in subsequent
5621 header lines, and spool format errors.
5623 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5624 client host had authenticated. This control can now be exercised by an ACL
5625 for more flexibility.
5627 69. By default, callouts do not happen when testing with -bh. There is now a
5628 variant, -bhc, which does actually run the callout code, including
5629 consulting and updating the callout cache.
5631 70. Added support for saslauthd authentication, courtesy of Alexander
5634 71. If statvfs() failed on the spool or log directories while checking their
5635 size for availability, Exim confusingly gave the error "space shortage".
5636 Furthermore, in debugging mode it crashed with a floating point exception.
5637 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5638 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5639 serious problem, Exim now writes to the main and panic logs when this
5640 happens, with details of the failure. It then refuses to accept the
5641 incoming message, giving the message "spool directory problem" or "log
5642 directory problem" with a 421 code for SMTP messages.
5644 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5645 0, 1, and 2 exist, because some OS complain for execs without them (see
5646 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5647 descriptors. However, the code omitted to check that the open succeeded,
5648 causing mysterious errors if for some reason the permissions on /dev/null
5649 got screwed. Now Exim writes a message to the main and panic logs, and
5650 bombs out if it can't open /dev/null.
5652 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5653 interact so that it is all more flexible. It is supposed to remain
5654 backwards compatible. Also added extra_local_interfaces.
5656 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5657 to bomb out with an assertion failure - to the client this appears as a
5658 connection drop. This problem occurs in the part of the code that was taken
5659 from the Samba project. Fortunately, the assertion is in a very simple
5660 function, so I have fixed this by reproducing the function inline in the
5661 one place where it is called, and arranging for authentication to fail
5662 instead of killing the process with assert().
5664 75. The SPA client code was not working when the server requested OEM rather
5665 than Unicode encoding.
5667 76. Added code to make require_files with a specific uid setting more usable in
5668 the case where statting the file as root fails - usually a non-root-mounted
5669 NFS file system. When this happens and the failure is EACCES, Exim now
5670 forks a subprocess and does the per-uid checking as the relevant uid.
5672 77. Added process_log_path.
5674 78. If log_file_path was not explicitly set, a setting of check_log_space or
5675 check_log_inodes was ignored.
5677 79. If a space check for the spool or log partitions fails, the incident is now
5678 logged. Of course, in the latter case the data may get lost...
5680 80. Added the %p formatting code to string_format() so that it can be used to
5681 print addresses in debug_print(). Adjusted all the address printing in the
5682 debugging in store.c to use %p rather than %d.
5684 81. There was a concern that a line of code in smtp_in.c could overflow a
5685 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5686 initially expressed, the concern was not well-founded, because trailing
5687 spaces are removed early. However, if the trailing spaces were followed by
5688 a NULL, they did not get removed, so the overflow was possible. Two fixes
5691 (a) I re-wrote the offending code in a cleaner fashion.
5692 (b) If an incoming SMTP command contains a NULL character, it is rejected
5695 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5696 runs initgroups(), so that if the Exim user is in any additional groups,
5697 they will be used during message reception.
5703 The change log for 4.20 and earlier releases has been archived.
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