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 JH/04 Add expansion item ${acl {name}{arg}...}
52 PP/01 Handle short writes when writing local log-files.
53 In practice, only affects FreeBSD (8 onwards).
54 Bugzilla 1053, with thanks to Dmitry Isaikin.
56 NM/01 Bugzilla 949 - Documentation tweak
58 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
61 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
63 PP/02 Implemented gsasl authenticator.
65 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
67 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
68 `pkg-config foo` for cflags/libs.
70 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
71 with rest of GSASL and with heimdal_gssapi.
73 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
74 `pkg-config foo` for cflags/libs for the TLS implementation.
76 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
77 properties get this fed in as external SSF. A number of robustness
78 and debugging improvements to the cyrus_sasl authenticator.
80 PP/08 cyrus_sasl server now expands the server_realm option.
82 PP/09 Bugzilla 1214 - Log authentication information in reject log.
83 Patch by Jeremy Harris.
85 PP/10 Added dbmjz lookup type.
87 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
89 PP/12 MAIL args handles TAB as well as SP, for better interop with
90 non-compliant senders.
91 Analysis and variant patch by Todd Lyons.
93 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
94 Bug report from Lars Müller <lars@samba.org> (via SUSE),
95 Patch from Dirk Mueller <dmueller@suse.com>
97 PP/13 tls_peerdn now print-escaped for spool files.
98 Observed some $tls_peerdn in wild which contained \n, which resulted
99 in spool file corruption.
101 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
102 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
103 or write after TLS renegotiation, which otherwise led to messages
106 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
107 as a tracking header (ie: a signed header comes before the signature).
108 Patch from Wolfgang Breyha.
110 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
111 comma-sep list; embedded commas doubled.
113 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
115 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
117 Report and patch from Dmitry Banschikov.
119 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
120 Removed SSL_clear() after SSL_new() which led to protocol negotiation
121 failures. We appear to now support TLS1.1+ with Exim.
123 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
124 lets Exim select keys and certificates based upon TLS SNI from client.
125 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
126 before an outbound SMTP session. New log_selector, +tls_sni.
128 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
129 NULL dereference. Report and patch from Alun Jones.
131 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
132 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
133 Not seeing resolver debug output on NetBSD, but suspect this is a
134 resolver implementation change.
136 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
137 Left warnings. Added "eximon gdb" invocation mode.
139 PP/21 Defaulting "accept_8bitmime" to true, not false.
141 PP/22 Added -bw for inetd wait mode support.
143 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
144 locate the relevant includes and libraries. Made this the default.
146 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
147 Bugzilla 1246, report and most of solution from Tomasz Kusy.
149 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
150 This may cause build issues on older platforms.
152 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
153 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
154 gnutls_require_mac & gnutls_require_protocols (no longer supported).
155 Added SNI support via GnuTLS too.
156 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
158 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
160 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
161 Applied second patch from Janne, implementing suggestion to default
162 multiple-strings-in-record handling to match SPF spec.
164 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
166 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
167 read-only, out of scope).
168 Patch from Wolfgang Breyha, report from Stuart Northfield.
170 PP/29 Fix three issues highlighted by clang analyser static analysis.
171 Only crash-plausible issue would require the Cambridge-specific
172 iplookup router and a misconfiguration.
173 Report from Marcin Mirosław.
175 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
177 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
178 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
179 As part of this, removing so much warning spew let me fix some minor
180 real issues in debug logging.
182 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
183 assignment on my part. Fixed.
185 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
186 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
187 Janne Snabb (who went above and beyond: thank you).
189 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
190 string otherwise requires a connection and a bunch more work and it's
191 relatively easy to get wrong. Should also expose TLS library linkage
194 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
195 64-bit ${eval} (JH/03).
197 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
198 GNU libc to support some of the 64-bit stuff, should not lead to
199 conflicts. Defined before os.h is pulled in, so if a given platform
200 needs to override this, it can.
202 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
203 protection layer was required, which is not implemented.
204 Bugzilla 1254, patch from Wolfgang Breyha.
206 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
207 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
208 tls_dhparam take prime identifiers. Also unbreak combination of
209 OpenSSL+DH_params+TLSSNI.
211 PP/39 Disable SSLv2 by default in OpenSSL support.
217 PP/01 Solaris build fix for Oracle's LDAP libraries.
218 Bugzilla 1109, patch from Stephen Usher.
220 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
222 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
225 TF/02 Fix a couple more cases where we did not log the error message
226 when unlink() failed. See also change 4.74-TF/03.
228 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
229 lock up or crash if it happened to be inside a call to libc when it
230 got a SIGUSR1 from exiwhat.
232 The SIGUSR1 handler appends the current process status to the process
233 log which is later printed by exiwhat. It used to use the general
234 purpose logging code to do this, but several functions it calls are
235 not safe for signals.
237 The new output code in the SIGUSR1 handler is specific to the process
238 log, and simple enough that it's easy to inspect for signal safety.
239 Removing some special cases also simplifies the general logging code.
240 Removing the spurious timestamps from the process log simplifies
243 TF/04 Improved ratelimit ACL condition.
245 The /noupdate option has been deprecated in favour of /readonly which
246 has clearer semantics. The /leaky, /strict, and /readonly update modes
247 are mutually exclusive. The update mode is no longer included in the
248 database key; it just determines when the database is updated. (This
249 means that when you upgrde Exim will forget old rate measurements.)
251 Exim now checks that the per_* options are used with an update mode that
252 makes sense for the current ACL. For example, when Exim is processing a
253 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
254 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
255 must specify per_mail/readonly. If you omit the update mode it defaults to
256 /leaky where that makes sense (as before) or /readonly where required.
258 The /noupdate option is now undocumented but still supported for
259 backwards compatibility. It is equivalent to /readonly except that in
260 ACLs where /readonly is required you may specify /leaky/noupdate or
261 /strict/noupdate which are treated the same as /readonly.
263 A useful new feature is the /count= option. This is a generalization
264 of the per_byte option, so that you can measure the throughput of other
265 aggregate values. For example, the per_byte option is now equivalent
266 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
268 The per_rcpt option has been generalized using the /count= mechanism
269 (though it's more complicated than the per_byte equivalence). When it is
270 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
271 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
272 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
273 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
274 Note that using per_rcpt with a non-readonly update mode in more than
275 one ACL will cause the recipients to be double-counted. (The per_mail
276 and per_byte options don't have this problem.)
278 The handling of very low rates has changed slightly. If the computed rate
279 is less than the event's count (usually one) then this event is the first
280 after a long gap. In this case the rate is set to the same as this event's
281 count, so that the first message of a spam run is counted properly.
283 The major new feature is a mechanism for counting the rate of unique
284 events. The new per_addr option counts the number of different
285 recipients that someone has sent messages to in the last time period. It
286 behaves like per_rcpt if all the recipient addresses are different, but
287 duplicate recipient addresses do not increase the measured rate. Like
288 the /count= option this is a general mechanism, so the per_addr option
289 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
290 example, measure the rate that a client uses different sender addresses
291 with the options per_mail/unique=$sender_address. There are further
292 details in the main documentation.
294 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
296 TF/06 Removed a few PCRE remnants.
298 TF/07 Automatically extract Exim's version number from tags in the git
299 repository when doing development or release builds.
301 PP/02 Raise smtp_cmd_buffer_size to 16kB.
302 Bugzilla 879. Patch from Paul Fisher.
304 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
305 Heavily based on revision 40f9a89a from Simon Arlott's tree.
308 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
310 PP/05 Variable $av_failed, true if the AV scanner deferred.
311 Bugzilla 1078. Patch from John Horne.
313 PP/06 Stop make process more reliably on build failure.
314 Bugzilla 1087. Patch from Heiko Schlittermann.
316 PP/07 Make maildir_use_size_file an _expandable_ boolean.
317 Bugzilla 1089. Patch from Heiko Schlittermann.
319 PP/08 Handle ${run} returning more data than OS pipe buffer size.
320 Bugzilla 1131. Patch from Holger Weiß.
322 PP/09 Handle IPv6 addresses with SPF.
323 Bugzilla 860. Patch from Wolfgang Breyha.
325 PP/10 GnuTLS: support TLS 1.2 & 1.1.
327 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
330 PP/11 match_* no longer expand right-hand-side by default.
331 New compile-time build option, EXPAND_LISTMATCH_RHS.
332 New expansion conditions, "inlist", "inlisti".
334 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
336 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
338 PP/14 fix log_write() format string regression from TF/03.
339 Bugzilla 1152. Patch from Dmitry Isaikin.
345 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
347 PP/02 Harmonised TLS library version reporting; only show if debugging.
348 Layout now matches that introduced for other libraries in 4.74 PP/03.
350 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
352 PP/04 New "dns_use_edns0" global option.
354 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
357 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
358 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
360 TK/01 Updated PolarSSL code to 0.14.2.
361 Bugzilla 1097. Patch from Andreas Metzler.
363 PP/07 Catch divide-by-zero in ${eval:...}.
366 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
369 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
370 format-string attack -- SECURITY: remote arbitrary code execution.
372 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
373 time unintentionally subject to list matching rules, letting the header
374 cause arbitrary Exim lookups (of items which can occur in lists, *not*
375 arbitrary string expansion). This allowed for information disclosure.
377 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
378 INT_MIN/-1 -- value coerced to INT_MAX.
384 NM/01 Workround for PCRE version dependency in version reporting
387 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
388 This fixes portability to compilers other than gcc, notably
389 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
391 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
392 makefiles for portability to HP-UX and POSIX correctness.
394 PP/01 Permit LOOKUP_foo enabling on the make command-line.
395 Also via indented variable definition in the Makefile.
396 (Debugging by Oliver Heesakkers).
398 PP/02 Restore caching of spamd results with expanded spamd_address.
399 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
401 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
402 Improves build reliability. Fix from: Frank Elsner
404 NM/02 Fix wide character breakage in the rfc2047 coding
405 Fixes bug 1064. Patch from Andrey N. Oktyabrski
407 NM/03 Allow underscore in dnslist lookups
408 Fixes bug 1026. Patch from Graeme Fowler
410 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
411 Code patches from Adam Ciarcinski of NetBSD.
413 NM/04 Fixed exiqgrep to cope with mailq missing size issue
416 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
417 is logged, to avoid truncation. Patch from John Horne.
419 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
420 Patch from Jakob Hirsch.
422 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
423 SQL string expansion failure details.
424 Patch from Andrey Oktyabrski.
426 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
427 Patch from Simon Arlott.
429 PP/09 New lookups functionality failed to compile on old gcc which rejects
430 extern declarations in function scope.
431 Patch from Oliver Fleischmann
433 PP/10 Use sig_atomic_t for flags set from signal handlers.
434 Check getgroups() return and improve debugging.
435 Fixed developed for diagnosis in bug 927 (which turned out to be
438 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
439 Patch from Mark Zealey.
441 PP/12 Bugzilla 1056: Improved spamd server selection.
442 Patch from Mark Zealey.
444 PP/13 Bugzilla 1086: Deal with maildir quota file races.
445 Based on patch from Heiko Schlittermann.
447 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
448 Patch from Uwe Doering, sign-off by Michael Haardt.
450 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
451 variable declaration deep within a block. Bug and patch from
454 PP/15 lookups-Makefile IRIX compatibilty coercion.
456 PP/16 Make DISABLE_DKIM build knob functional.
458 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
459 Patch by Simon Arlott
461 TF/03 Fix valgrind.h portability to C89 compilers that do not support
462 variable argument macros. Our copy now differs from upstream.
468 TF/01 Failure to get a lock on a hints database can have serious
469 consequences so log it to the panic log.
471 TF/02 Log LMTP confirmation messages in the same way as SMTP,
472 controlled using the smtp_confirmation log selector.
474 TF/03 Include the error message when we fail to unlink a spool file.
476 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
477 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
478 for maintaining out-of-tree patches for some time.
480 PP/01 Bugzilla 139: Documentation and portability issues.
481 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
482 Handle per-OS dynamic-module compilation flags.
484 PP/02 Let /dev/null have normal permissions.
485 The 4.73 fixes were a little too stringent and complained about the
486 permissions on /dev/null. Exempt it from some checks.
487 Reported by Andreas M. Kirchwitz.
489 PP/03 Report version information for many libraries, including
490 Exim version information for dynamically loaded libraries. Created
491 version.h, now support a version extension string for distributors
492 who patch heavily. Dynamic module ABI change.
494 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
495 privilege escalation vulnerability whereby the Exim run-time user
496 can cause root to append content of the attacker's choosing to
499 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
502 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
503 If dropping privileges for untrusted macros, we disabled normal logging
504 on the basis that it would fail; for the Exim run-time user, this is not
505 the case, and it resulted in successful deliveries going unlogged.
506 Fixed. Reported by Andreas Metzler.
512 PP/01 Date: & Message-Id: revert to normally being appended to a message,
513 only prepend for the Resent-* case. Fixes regression introduced in
514 Exim 4.70 by NM/22 for Bugzilla 607.
516 PP/02 Include check_rfc2047_length in configure.default because we're seeing
517 increasing numbers of administrators be bitten by this.
519 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
521 PP/03 Bugzilla 994: added openssl_options main configuration option.
523 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
525 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
527 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
529 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
530 without a peer certificate, leading to a segfault because of an
531 assumption that peers always have certificates. Be a little more
532 paranoid. Problem reported by Martin Tscholak.
534 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
535 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
536 NB: ClamAV planning to remove STREAM in "middle of 2010".
537 CL also introduces -bmalware, various -d+acl logging additions and
538 more caution in buffer sizes.
540 PP/09 Implemented reverse_ip expansion operator.
542 PP/10 Bugzilla 937: provide a "debug" ACL control.
544 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
546 PP/12 Bugzilla 973: Implement --version.
548 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
550 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
552 PP/15 Bugzilla 816: support multiple condition rules on Routers.
554 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
555 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
556 ignore trailing whitespace.
558 JJ/02 prevent non-panic DKIM error from being sent to paniclog
560 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
563 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
564 Notification from Dr Andrew Aitchison.
566 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
567 ExtendedDetectionInfo response format.
568 Notification from John Horne.
570 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
573 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
574 XSL and documented dependency on system catalogs, with examples of how
577 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
580 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
581 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
582 configuration file which is writeable by the Exim user or group.
584 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
585 of configuration files to cover files specified with the -C option if
586 they are going to be used with root privileges, not just the default
589 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
590 option (effectively making it always true).
592 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
593 files to be used while preserving root privileges.
595 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
596 that rogue child processes cannot use them.
598 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
599 run-time user, instead of root.
601 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
602 Exim run-time user without dropping privileges.
604 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
605 result string, instead of calling string_vformat() twice with the same
608 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
609 for other users. Others should always drop root privileges if they use
610 -C on the command line, even for a whitelisted configure file.
612 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
614 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
620 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
621 $data_path, and $header_path variables; fixed documentation bugs and
624 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
625 exipick to access non-standard spools, including the "frozen" queue
628 NM/01 Bugzilla 965: Support mysql stored procedures.
629 Patch from Alain Williams
631 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
633 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
634 Patch from Andreas Metzler
636 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
637 Patch from Kirill Miazine
639 NM/05 Bugzilla 671: Added umask to procmail example.
641 JJ/03 installed exipick 20100323.0, fixing doc bug
643 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
644 directory. Notification and patch from Dan Rosenberg.
646 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
648 TK/02 Improve log output when DKIM signing operation fails.
650 MH/01 Treat the transport option dkim_domain as a colon separated
651 list, not as a single string, and sign the message with each element,
652 omitting multiple occurences of the same signer.
654 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
655 Bugzilla 985, 986. Patch by Simon Arlott
657 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
658 Patch by Simon Arlott
660 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
661 MBX locking. Notification from Dan Rosenberg.
667 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
669 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
671 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
673 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
675 NM/04 Bugzilla 915: Flag broken perl installation during build.
681 TK/01 Added patch by Johannes Berg that expands the main option
682 "spamd_address" if it starts with a dollar sign.
684 TK/02 Write list of recipients to X-Envelope-Sender header when building
685 the mbox-format spool file for content scanning (suggested by Jakob
688 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
689 (http://www.dcc-servers.net/) support via dccifd. Activated by
690 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
692 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
693 by Mark Daniel Reidel <mr@df.eu>.
695 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
696 When building exim an external PCRE library is now needed -
697 PCRE is a system library on the majority of modern systems.
698 See entry on PCRE_LIBS in EDITME file.
700 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
701 conversation. Added nologin parameter to request.
702 Patch contributed by Kirill Miazine.
704 TF/01 Do not log submission mode rewrites if they do not change the address.
706 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
708 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
709 log files in place. Contributed by Roberto Lima.
711 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
713 TF/03 Bugzilla 615: When checking the local_parts router precondition
714 after a local_part_suffix or local_part_prefix option, Exim now
715 does not use the address's named list lookup cache, since this
716 contains cached lookups for the whole local part.
718 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
719 Robert Millan. Documentation is in experimental-spec.txt.
721 TF/04 Bugzilla 668: Fix parallel build (make -j).
723 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
725 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
726 Patch provided by Jan Srzednicki.
728 TF/05 Leading white space used to be stripped from $spam_report which
729 wrecked the formatting. Now it is preserved.
731 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
732 that they are available at delivery time.
734 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
736 TF/08 TLS error reporting now respects the incoming_interface and
737 incoming_port log selectors.
739 TF/09 Produce a more useful error message if an SMTP transport's hosts
740 setting expands to an empty string.
742 NM/06 Bugzilla 744: EXPN did not work under TLS.
743 Patch provided by Phil Pennock.
745 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
746 Patch provided by Richard Godbee.
748 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
749 acl_smtp_notquit, added index entry.
751 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
752 Patch provided by Eugene Bujak.
754 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
755 accept(). Patch provided by Maxim Dounin.
757 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
758 Patch provided by Phil Pennock.
760 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
762 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
763 Patch provided by Brad "anomie" Jorsch.
765 NM/14 Bugzilla 622: Added timeout setting to transport filter.
766 Patch provided by Dean Brooks.
768 TK/05 Add native DKIM support (does not depend on external libraries).
770 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
771 Patch provided by Graeme Fowler.
773 NM/16 Bugzilla 851: Documentation example syntax fix.
775 NM/17 Changed NOTICE file to remove references to embedded PCRE.
777 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
780 NM/19 Bugzilla 745: TLS version reporting.
781 Patch provided by Phil Pennock.
783 NM/20 Bugzilla 167: bool: condition support.
784 Patch provided by Phil Pennock.
786 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
787 clients. Patch provided by Phil Pennock.
789 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
790 Patch provided by Brad "anomie" Jorsch.
792 NM/23 Bugzilla 687: Fix misparses in eximstats.
793 Patch provided by Heiko Schlittermann.
795 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
796 Patch provided by Heiko Schlittermann.
798 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
799 plus update to original patch.
801 NM/26 Bugzilla 799: Documentation correction for ratelimit.
803 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
804 Patch provided by David Brownlee.
806 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
808 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
810 NM/30 Bugzilla 888: TLS documentation bugfixes.
812 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
814 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
815 Unlike the original bugzilla I have changed all shell scripts in src tree.
817 NM/33 Bugzilla 898: Transport filter timeout fix.
818 Patch by Todd Rinaldo.
820 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
821 Patch by Serge Demonchaux.
823 NM/35 Bugzilla 39: Base64 decode bug fixes.
824 Patch by Jakob Hirsch.
826 NM/36 Bugzilla 909: Correct connect() call in dcc code.
828 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
830 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
832 NM/39 Bugzilla 911: Fixed MakeLinks build script.
838 TK/01 Add preliminary DKIM support. Currently requires a forked version of
839 ALT-N's libdkim that I have put here:
840 http://duncanthrax.net/exim-experimental/
842 Note to Michael Haardt: I had to rename some vars in sieve.c. They
843 were called 'true' and it seems that C99 defines that as a reserved
844 keyword to be used with 'bool' variable types. That means you could
845 not include C99-style headers which use bools without triggering
846 build errors in sieve.c.
848 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
849 as mailq or other aliases. Changed the --help handling significantly
850 to do whats expected. exim_usage() emits usage/help information.
852 SC/01 Added the -bylocaldomain option to eximstats.
854 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
856 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
858 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
864 PH/01 Another patch from the Sieve maintainer.
866 PH/02 When an IPv6 address is converted to a string for single-key lookup
867 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
868 dots are used instead of colons so that keys in lsearch files need not
869 contain colons. This was done some time before quoting was made available
870 in lsearch files. However, iplsearch files do require colons in IPv6 keys
871 (notated using the quote facility) so as to distinguish them from IPv4
872 keys. This meant that lookups for IP addresses in host lists did not work
873 for iplsearch lookups.
875 This has been fixed by arranging for IPv6 addresses to be expressed with
876 colons if the lookup type is iplsearch. This is not incompatible, because
877 previously such lookups could never work.
879 The situation is now rather anomolous, since one *can* have colons in
880 ordinary lsearch keys. However, making the change in all cases is
881 incompatible and would probably break a number of configurations.
883 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
886 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
887 conversion specification without a maximum field width, thereby enabling
888 a rogue spamd server to cause a buffer overflow. While nobody in their
889 right mind would setup Exim to query an untrusted spamd server, an
890 attacker that gains access to a server running spamd could potentially
891 exploit this vulnerability to run arbitrary code as the Exim user.
893 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
894 $primary_hostname instead of what libspf2 thinks the hosts name is.
896 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
897 a directory entry by the name of the lookup key. Previously, if a
898 symlink pointed to a non-existing file or a file in a directory that
899 Exim lacked permissions to read, a lookup for a key matching that
900 symlink would fail. Now it is enough that a matching directory entry
901 exists, symlink or not. (Bugzilla 503.)
903 PH/03 The body_linecount and body_zerocount variables are now exported in the
906 PH/04 Added the $dnslist_matched variable.
908 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
909 This means they are set thereafter only if the connection becomes
912 PH/06 Added the client_condition to authenticators so that some can be skipped
913 by clients under certain conditions.
915 PH/07 The error message for a badly-placed control=no_multiline_responses left
916 "_responses" off the end of the name.
918 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
920 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
921 (without spaces) instead of just copying the configuration text.
923 PH/10 Added the /noupdate option to the ratelimit ACL condition.
925 PH/11 Added $max_received_linelength.
927 PH/12 Added +ignore_defer and +include_defer to host lists.
929 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
930 way in which PCRE > 7.0 is built.
932 PH/14 Implemented queue_only_load_latch.
934 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
935 MAIL command. The effect was to mangle the value on 64-bit systems.
937 PH/16 Another patch from the Sieve maintainer.
939 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
941 PH/18 If a system quota error occurred while trying to create the file for
942 a maildir delivery, the message "Mailbox is full" was not appended to the
943 bounce if the delivery eventually timed out. Change 4.67/27 below applied
944 only to a quota excession during the actual writing of the file.
946 PH/19 It seems that peer DN values may contain newlines (and other non-printing
947 characters?) which causes problems in log lines. The DN values are now
948 passed through string_printing() before being added to log lines.
950 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
951 and InterBase are left for another time.)
953 PH/21 Added message_body_newlines option.
955 PH/22 Guard against possible overflow in moan_check_errorcopy().
957 PH/23 POSIX allows open() to be a macro; guard against that.
959 PH/24 If the recipient of an error message contained an @ in the local part
960 (suitably quoted, of course), incorrect values were put in $domain and
961 $local_part during the evaluation of errors_copy.
967 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
968 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
971 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
972 issue a MAIL command.
974 PH/02 In an ACL statement such as
976 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
978 if a client was not listed at all, or was listed with a value other than
979 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
980 the condition was not true (as it should be), so access was not denied.
981 The bug was that the ! inversion was incorrectly passed on to the second
982 item. This has been fixed.
984 PH/03 Added additional dnslists conditions == and =& which are different from
985 = and & when the dns lookup returns more than one IP address.
987 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
988 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
990 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
991 FSYNC, which compiles an option called disable_fsync that allows for
992 bypassing fsync(). The documentation is heavily laced with warnings.
994 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
996 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
997 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
998 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
999 including adding "make clean"; (3) Added -fPIC when compiling the test
1000 dynamically loaded module, to get rid of a warning.
1002 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1003 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1004 = 0s. The bug is otherwise harmless.
1006 PH/07 There was a bug in the dovecot authenticator such that the value of
1007 $auth1 could be overwritten, and so not correctly preserved, after a
1008 successful authentication. This usually meant that the value preserved by
1009 the server_setid option was incorrect.
1011 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1013 PH/09 Installed PCRE release 7.0.
1015 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1016 run for batched SMTP input. It is now run at the start of every message
1017 in the batch. While fixing this I discovered that the process information
1018 (output by running exiwhat) was not always getting set for -bs and -bS
1019 input. This is fixed, and it now also says "batched" for BSMTP.
1021 PH/11 Added control=no_pipelining.
1023 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1024 patch, slightly modified), and move the expansion of helo_data till after
1025 the connection is made in the smtp transport (so it can use these
1028 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1030 PH/14 Added log_selector = +pid.
1032 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1034 PH/16 Add ${if forany and ${if forall.
1036 PH/17 Added dsn_from option to vary the From: line in DSNs.
1038 PH/18 Flush SMTP output before performing a callout, unless control =
1039 no_callout_flush is set.
1041 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1042 was true (the default) a successful delivery failed to delete the retry
1043 item, thus causing premature timeout of the address. The bug is now
1046 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1048 PH/21 Long custom messages for fakedefer and fakereject are now split up
1049 into multiline reponses in the same way that messages for "deny" and
1050 other ACL rejections are.
1052 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1053 with slight modification.
1055 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1056 draft, changing the syntax and factoring some duplicate code".
1058 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1059 for deliveries of the second and subsequent messages over the same SMTP
1062 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1063 ${reduce, with only minor "tidies".
1065 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1067 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1068 expansion side effects.
1070 PH/27 When a message times out after an over-quota error from an Exim-imposed
1071 quota, the bounce message says "mailbox is full". This message was not
1072 being given when it was a system quota that was exceeded. It now should
1075 MH/03 Made $recipients available in local_scan(). local_scan() already has
1076 better access to the recipient list through recipients_list[], but
1077 $recipients can be useful in postmaster-provided expansion strings.
1079 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1080 in the case of a MAIL command with additional options following the
1081 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1082 were accidentally chopped off.
1084 PH/29 SMTP synchronization checks are implemented when a command is read -
1085 there is a check that no more input is waiting when there shouldn't be
1086 any. However, for some commands, a delay in an ACL can mean that it is
1087 some time before the response is written. In this time, more input might
1088 arrive, invalidly. So now there are extra checks after an ACL has run for
1089 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1090 pipelining has not been advertised.
1092 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1094 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1095 returned in the SMTP response when smtp_return_error_details was false.
1096 This has been fixed.
1098 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1099 instead of the C I/O that was originally supplied, because problems were
1100 reported on Solaris.
1102 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1103 Exim which did not show up earlier: it was assuming that a call to
1104 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1105 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1106 was a macro that became an assignment, so it seemed to work. This has
1107 changed to a proper function call with a void return, hence the compile
1108 error. Exim's code has been fixed.
1110 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1113 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1115 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1117 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1118 because it turns out to be too big or there is a timeout) there is no
1119 "Completed" line in the log. When some messages of this type were
1120 selected by exigrep, they were listed as "not completed". Others were
1121 picked up by some special patterns. I have improved the selection
1122 criteria to be more general.
1124 PH/38 The host_find_failed option in the manualroute router can now be set
1125 to "ignore", to completely ignore a host whose IP address cannot be
1126 found. If all hosts are ignored, the behaviour is controlled by the new
1127 host_all_ignored option.
1129 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1130 homing or because of multiple MX records with /mx) generated more than
1131 one IP address, and the following item turned out to be the local host,
1132 all the secondary addresses of the first item were incorrectly removed
1133 from the list, along with the local host and any following hosts (which
1134 is what is supposed to happen).
1136 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1137 whoever called Exim into the -H file. In the case of the daemon it was
1138 behaving confusingly. When first started, it used values for whoever
1139 started the daemon, but after a SIGHUP it used the Exim user (because it
1140 calls itself on a restart). I have changed the code so that it now always
1143 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1144 message are rejected with the same error (e.g. no authentication or bad
1145 sender address), and a DATA command is nevertheless sent (as can happen
1146 with PIPELINING or a stupid MUA), the error message that was given to the
1147 RCPT commands is included in the rejection of the DATA command. This is
1148 intended to be helpful for MUAs that show only the final error to their
1151 PH/42 Another patch from the Sieve maintainer.
1153 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1154 Eximstats - Fixed some broken HTML links and added missing column headers
1156 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1157 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1159 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1161 PH/43 Yet another patch from the Sieve maintainer.
1163 PH/44 I found a way to check for a TCP/IP connection going away before sending
1164 the response to the final '.' that terminates a message, but only in the
1165 case where the client has not sent further data following the '.'
1166 (unfortunately, this is allowed). However, in many cases there won't be
1167 any further data because there won't be any more messages to send. A call
1168 to select() can be used: if it shows that the input is "ready", there is
1169 either input waiting, or the socket has been closed. An attempt to read
1170 the next input character can distinguish the two cases. Previously, Exim
1171 would have sent an OK response which the client would never have see.
1172 This could lead to message repetition. This fix should cure that, at
1173 least in a lot of common cases.
1175 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1176 advertised in response to EHLO.
1182 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1183 fixed by 4.65/MH/01 (is this a record?) are fixed:
1185 (i) An empty string was always treated as zero by the numeric comparison
1186 operators. This behaviour has been restored.
1188 (ii) It is documented that the numeric comparison operators always treat
1189 their arguments as decimal numbers. This was broken in that numbers
1190 starting with 0 were being interpreted as octal.
1192 While fixing these problems I realized that there was another issue that
1193 hadn't been noticed. Values of message_size_limit (both the global option
1194 and the transport option) were treated as octal if they started with 0.
1195 The documentation was vague. These values are now always treated as
1196 decimal, and I will make that clear in the documentation.
1202 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1203 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1206 MH/01 Don't check that the operands of numeric comparison operators are
1207 integers when their expansion is in "skipping" mode (fixes bug
1208 introduced by 4.64-PH/07).
1210 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1211 child addresses, Exim now panics and dies. Previously, because the count
1212 is held in a short int, deliveries were likely to be lost. As such a
1213 large number of recipients for a single message is ridiculous
1214 (performance will be very, very poor), I have chosen to impose a limit
1215 rather than extend the field.
1221 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1222 leftover -K file (the existence of which was triggered by #402).
1223 While we were at it, introduced process PID as part of the -K
1224 filename. This should rule out race conditions when creating
1227 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1228 processing considerably. Previous code took too long for large mails,
1229 triggering a timeout which in turn triggers #401.
1231 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1232 in the DK code in transports.c. sendfile() is not really portable,
1233 hence the _LINUX specificness.
1235 TF/01 In the add_headers option to the mail command in an Exim filter,
1236 there was a bug that Exim would claim a syntax error in any
1237 header after the first one which had an odd number of characters
1240 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1241 callout verification, Exim cached a "reject" for the entire domain. This
1242 is correct for most verifications, but it is not correct for a recipient
1243 verification with use_sender or use_postmaster set, because in that case
1244 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1245 case of MAIL FROM:<> rejection from other early rejections (e.g.
1246 rejection of HELO). When verifying a recipient using a non-null MAIL
1247 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1248 Whatever the result of the callout, the value of the domain cache is
1249 left unchanged (for any other kind of callout, getting as far as trying
1250 RCPT means that the domain itself is ok).
1252 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1255 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1256 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1257 session, the daemon ignores ECONNECT errors and logs others; it now
1258 ignores EPIPE as well.
1260 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1261 (quoted-printable decoding).
1263 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1264 later the small subsequent patch to fix an introduced bug.
1266 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1268 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1270 PH/08 An error is now given if message_size_limit is specified negative.
1272 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1273 to be given (somewhat) arbitrary names.
1275 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1278 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1279 miscellaneous code fixes
1281 PH/10 Added the log_reject_target ACL modifier to specify where to log
1284 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1285 hostname. This is wrong, because it relates to the incoming message (and
1286 probably the interface on which it is arriving) and not to the outgoing
1287 callout (which could be using a different interface). This has been
1288 changed to use the value of the helo_data option from the smtp transport
1289 instead - this is what is used when a message is actually being sent. If
1290 there is no remote transport (possible with a router that sets up host
1291 addresses), $smtp_active_hostname is used.
1293 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1294 tweaks were necessary in order to get it to work (see also 21 below):
1295 (a) The code assumed that strncpy() returns a negative number on buffer
1296 overflow, which isn't the case. Replaced with Exim's string_format()
1298 (b) There were several signed/unsigned issues. I just did the minimum
1299 hacking in of casts. There is scope for a larger refactoring.
1300 (c) The code used strcasecmp() which is not a standard C function.
1301 Replaced with Exim's strcmpic() function.
1302 (d) The code set only $1; it now sets $auth1 as well.
1303 (e) A simple test gave the error "authentication client didn't specify
1304 service in request". It would seem that Dovecot has changed its
1305 interface. Fortunately there's a specification; I followed it and
1306 changed what the client sends and it appears to be working now.
1308 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1311 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1312 address A is aliased to B and C, where B exists and C does not. Without
1313 -v the output is "A verified" because verification stops after a
1314 successful redirection if more than one address is generated. However,
1315 with -v the child addresses are also verified. Exim was outputting "A
1316 failed to verify" and then showing the successful verification for C,
1317 with its parentage. It now outputs "B failed to verify", showing B's
1318 parentage before showing the successful verification of C.
1320 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1321 look up a TXT record in a specific list after matching in a combined
1324 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1325 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1326 they consult the DNS. I had assumed they would set it the way they
1327 wanted; and indeed my experiments on Linux seem to show that in some
1328 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1329 To be on the safe side, however, I have now made the interface to
1330 host_find_byname() similar to host_find_bydns(), with an argument
1331 containing the DNS resolver options. The host_find_byname() function now
1332 sets these options at its start, just as host_find_bydns() does. The smtp
1333 transport options dns_qualify_single and dns_search_parents are passed to
1334 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1335 of host_find_byname() use the default settings of RES_DEFNAMES
1336 (qualify_single) but not RES_DNSRCH (search_parents).
1338 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1339 spool_read_header() do less string testing, by means of a preliminary
1340 switch on the second character of optional "-foo" lines. (This is
1341 overdue, caused by the large number of possibilities that now exist.
1342 Originally there were few.) While I was there, I also converted the
1343 str(n)cmp tests so they don't re-test the leading "-" and the first
1344 character, in the hope this might squeeze out yet more improvement.
1346 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1347 flag allowing group syntax was set by the header_syntax check but not
1348 turned off, possible causing trouble later; (2) The flag was not being
1349 set at all for the header_verify test, causing "group"-style headers to
1350 be rejected. I have now set it in this case, and also caused header_
1351 verify to ignore an empty address taken from a group. While doing this, I
1352 came across some other cases where the code for allowing group syntax
1353 while scanning a header line wasn't quite right (mostly, not resetting
1354 the flag correctly in the right place). These bugs could have caused
1355 trouble for malformed header lines. I hope it is now all correct.
1357 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1358 with the "reply" argument non-NULL. The code, however (which originally
1359 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1360 but it didn't always do it. This confused somebody who was copying the
1361 code for some other use. I have removed all the tests.
1363 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1364 feature that was used to support insecure browsers during the U.S. crypto
1365 embargo. It requires special client support, and Exim is probably the
1366 only MTA that supported it -- and would never use it because real RSA is
1367 always available. This code has been removed, because it had the bad
1368 effect of slowing Exim down by computing (never used) parameters for the
1369 RSA_EXPORT functionality.
1371 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1372 authenticator to fail if there's a tab character in the incoming data
1373 (there should never be unless someone is messing about, as it's supposed
1374 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1375 if the connection is using TLS or if the remote IP is the same as the
1376 local IP, and the "valid-client-cert option" if a client certificate has
1379 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1380 authenticators. This can be used for authorization after authentication
1381 succeeds. (In the case of plaintext, it servers for both authentication
1384 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1385 if any retry times were supplied.
1387 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1388 connection, where there is no client IP address to check. In this
1389 situation, the verify now always succeeds.
1391 PH/25 Applied John Jetmore's -Mset patch.
1393 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1395 PH/27 In a string expansion for a processed (not raw) header when multiple
1396 headers of the same name were present, leading whitespace was being
1397 removed from all of them, but trailing whitespace was being removed only
1398 from the last one. Now trailing whitespace is removed from each header
1399 before concatenation. Completely empty headers in a concatenation (as
1400 before) are ignored.
1402 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1403 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1405 PH/29 [Removed. This was a change that I later backed out, and forgot to
1406 correct the ChangeLog entry (that I had efficiently created) before
1407 committing the later change.]
1409 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1410 address errors (4xx response to RCPT) over the same connection as other
1411 messages routed to the same hosts. Such deliveries are always "forced",
1412 so retry times are not inspected. This resulted in far too many retries
1413 for the affected addresses. The effect occurred only when there were more
1414 hosts than the hosts_max_try setting in the smtp transport when it had
1415 the 4xx errors. Those hosts that it had tried were not added to the list
1416 of hosts for which the message was waiting, so if all were tried, there
1417 was no problem. Two fixes have been applied:
1419 (i) If there are any address or message errors in an SMTP delivery, none
1420 of the hosts (tried or untried) are now added to the list of hosts
1421 for which the message is waiting, so the message should not be a
1422 candidate for sending over the same connection that was used for a
1423 successful delivery of some other message. This seems entirely
1424 reasonable: after all the message is NOT "waiting for some host".
1425 This is so "obvious" that I'm not sure why it wasn't done
1426 previously. Hope I haven't missed anything, but it can't do any
1427 harm, as the worst effect is to miss an optimization.
1429 (ii) If, despite (i), such a delivery is accidentally attempted, the
1430 routing retry time is respected, so at least it doesn't keep
1431 hammering the server.
1433 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1434 in ${readsocket because some servers need this prod.
1436 PH/32 Added some extra debug output when updating a wait-xxx database.
1438 PH/33 The hint "could be header name not terminated by colon", which has been
1439 given for certain expansion errors for a long time, was not being given
1440 for the ${if def:h_colon_omitted{... case.
1442 PH/34 The spec says: "With one important exception, whenever a domain list is
1443 being scanned, $domain contains the subject domain." There was at least
1444 one case where this was not true.
1446 PH/35 The error "getsockname() failed: connection reset by peer" was being
1447 written to the panic log as well as the main log, but it isn't really
1448 panic-worthy as it just means the connection died rather early on. I have
1449 removed the panic log writing for the ECONNRESET error when getsockname()
1452 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1453 runs only) independently of the message's sender address. This meant
1454 that, if the 4xx error was in fact related to the sender, a different
1455 message to the same recipient with a different sender could confuse
1456 things. In particualar, this can happen when sending to a greylisting
1457 server, but other circumstances could also provoke similar problems.
1458 I have changed the default so that the retry time for these errors is now
1459 based a combination of the sender and recipient addresses. This change
1460 can be overridden by setting address_retry_include_sender=false in the
1463 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1464 remote server are returned as part of bounce messages. This was not
1465 happening for LMTP over a pipe (the lmtp transport), but now it is the
1466 same for both kinds of LMTP.
1468 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1469 in header lines that were in fact CNAMEs. This is no longer the case.
1471 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1472 and queue runs started by the daemon processed all messages. This has
1473 been fixed so that -R and -S can now usefully be given with -q<time>.
1475 PH/40 Import PCRE release 6.7 (fixes some bugs).
1477 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1479 PH/42 Give an error if -q is specified more than once.
1481 PH/43 Renamed the variables $interface_address and $interface_port as
1482 $received_ip_address and $received_port, to make it clear that these
1483 values apply to message reception, and not to the outgoing interface when
1484 a message is delivered. (The old names remain recognized, of course.)
1486 PH/44 There was no timeout on the connect() call when using a Unix domain
1487 socket in the ${readsocket expansion. There now is.
1489 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1490 be meaningful with "accept".
1492 SC/01 Eximstats V1.43
1493 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1495 SC/02 Eximstats V1.44
1496 Use a glob alias rather than an array ref in the generated
1497 parser. This improves both readability and performance.
1499 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1500 Collect SpamAssassin and rejection statistics.
1501 Don't display local sender or destination tables unless
1502 there is data to show.
1503 Added average volumes into the top table text output.
1505 SC/04 Eximstats V1.46
1506 Collect data on the number of addresses (recipients)
1507 as well as the number of messages.
1509 SC/05 Eximstats V1.47
1510 Added 'Message too big' to the list of mail rejection
1511 reasons (thanks to Marco Gaiarin).
1513 SC/06 Eximstats V1.48
1514 Mainlog lines which have GMT offsets and are too short to
1515 have a flag are now skipped.
1517 SC/07 Eximstats V1.49 (Alain Williams)
1518 Added the -emptyok flag.
1520 SC/08 Eximstats V1.50
1521 Fixes for obtaining the IP address from reject messages.
1523 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1524 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1525 whitesspace changes from 4.64-PH/27
1527 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1530 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1531 are found, allow negative numbers in numeric criteria)
1533 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1535 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1536 to match changes made in 4.64-PH/43
1538 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1540 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1541 "domain" is actually an IP address, and force a failure. This locks out
1542 those revolvers/nameservers that support "A-for-A" lookups, in
1543 contravention of the specifications.
1545 PH/48 When a host name was looked up from an IP address, and the subsequent
1546 forward lookup of the name timed out, the host name was left in
1547 $sender_host_name, contrary to the specification.
1549 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1550 restricted to single-key lookups, Exim was not diagnosing an error if
1551 * or *@ was used with a query-style lookup.
1553 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1555 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1556 long ago, but noone interested enough thought of it. Let's just say that
1557 the "1.1" means that there are some new functions that weren't there at
1558 some point in the past.
1560 PH/51 Error processing for expansion failure of helo_data from an smtp
1561 transport during callout processing was broken.
1563 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1564 tested/used via the -bh/-bhc/-bs options.
1566 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1567 bug, fixed in subsequent PCRE releases).
1569 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1570 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1572 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1578 SC/01 Use a glob alias rather than an array ref in eximstats generated
1579 parser. This improves both readability and performance.
1581 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1582 Don't display local sender or destination tables in eximstats unless
1583 there is data to show.
1584 Added average volumes into the eximstats top table text output.
1586 SC/03 Collect data on the number of addresses (recipients) as well
1587 as the number of messages in eximstats.
1589 TF/01 Correct an error in the documentation for the redirect router. Exim
1590 does (usually) call initgroups() when daemonizing.
1592 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1593 with consistent privilege compared to when running as a daemon.
1595 TF/03 Note in the spec that $authenticated_id is not set for local
1596 submissions from trusted users.
1598 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1599 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1601 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1602 by adding some example configuration directives to the default
1603 configuration file. A little bit of work is required to uncomment the
1604 directives and define how usernames and passwords are checked, but
1605 there is now a framework to start from.
1607 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1608 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1609 without this. I don't know how relevant this is to other LDAP libraries.
1611 PH/02 Add the verb name to the "unknown ACL verb" error.
1613 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1615 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1617 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1618 directory not expanded when it should be if an expanded home directory
1619 was set for the address (which is overridden by the transport).
1621 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1624 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1625 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1626 because it is too late at that time, and has no effect.
1628 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1629 security issue with \' (bugzilla #107). I could not use the
1630 PQescapeStringConn() function, because it needs a PGconn value as one of
1633 PH/08 When testing addresses using -bt, indicate those final addresses that
1634 are duplicates that would not cause an additional delivery. At least one
1635 person was confused, thinking that -bt output corresponded to deliveries.
1636 (Suppressing duplicates isn't a good idea as you lose the information
1637 about possibly different redirections that led to the duplicates.)
1639 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1640 systems where poll() doesn't work, in particular OS X.
1642 PH/10 Added more information to debugging output for retry time not reached.
1644 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1645 operations in malware.c.
1647 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1650 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1651 syslog_duplication set false, log lines that would normally be written
1652 both the the main log and to the reject log were not written to syslog at
1655 PH/14 In the default configuration, change the use of "message" in ACL warn
1656 statements to "add_header".
1658 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1659 not followed by a command (e.g. "seen endif").
1661 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1662 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1665 PH/17 Added extra conditions to the default value of delay_warning_condition
1669 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1670 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1671 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1674 The Auto-Submitted: and various List- headers are standardised, whereas I
1675 don't think Precedence: ever was.
1677 PH/18 Refactored debugging code in route_finduser() to show more information,
1678 in particular, the error code if getpwnam() issues one.
1680 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1681 This is apparently needed in addition to the PH/07 change above to avoid
1682 any possible encoding problems.
1684 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1685 but not after initializing Perl.
1687 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1688 output them only if debugging. By default they are written stderr,
1689 apparently, which is not desirable.
1691 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1694 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1697 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1699 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1700 authenticated or an ident call has been made. Suppress the default
1701 values for $authenticated_id and $authenticated_sender (but permit -oMai
1702 and -oMas) when testing with -bh.
1704 PH/24 Re-jigged the order of the tests in the default configuration so that the
1705 tests for valid domains and recipients precede the DNS black list and CSA
1706 tests, on the grounds that those ones are more expensive.
1708 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1709 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1710 This bug exists in every version of Exim that I still have, right back to
1713 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1714 However, an attempt to turn on case-sensitivity in a regex key by
1715 including (?-i) didn't work because the subject string was already
1716 lowercased, and the effects were non-intuitive. It turns out that a
1717 one-line patch can be used to allow (?-i) to work as expected.
1723 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1724 other effects) broke the use of negated acl sub-conditions.
1726 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1729 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1730 "Deny" causes Exim to reject the incoming connection with a 554 error.
1731 Unfortunately, if there is a major crisis, such as a disk failure,
1732 tcp-wrappers gives "deny", whereas what one would like would be some
1733 kind of temporary error. A kludge has been added to help with this.
1734 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1735 554 error is used if errno is still zero or contains ENOENT (which occurs
1736 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1739 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1741 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1742 errors. Otherwise a message that provokes a temporary error (when other
1743 messages do not) can cause a whole host to time out.
1745 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1746 addresses were routed directly to files or pipes from a redirect router.
1747 File deliveries just didn't batch; pipe deliveries might have suffered
1750 PH/06 A failure to get a lock for a hints database would erroneously always say
1751 "Failed to get write lock", even when it was really a read lock.
1753 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1754 of 0600. This has been changed to use the value of the lockfile_mode
1755 option (which defaults to 0600).
1757 PH/08 Applied small patch from the Sieve maintainer.
1759 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1760 folder from quota calculations, a direct delivery into this folder messed
1761 up the contents of the maildirsize file. This was because the regex was
1762 used only to exclude .Trash (or whatever) when the size of the mailbox
1763 was calculated. There was no check that a delivery was happening into an
1764 excluded directory. This bug has been fixed by ignoring all quota
1765 processing for deliveries into excluded directories.
1767 PH/10 Added the maildirfolder_create_regex option to appendfile.
1773 PH/01 The code for finding all the local interface addresses on a FreeBSD
1774 system running IPv6 was broken. This may well have applied to all BSD
1775 systems, as well as to others that have similar system calls. The broken
1776 code found IPv4 interfaces correctly, but gave incorrect values for the
1777 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1778 that it would not match correctly against @[] and not recognize the IPv6
1781 PH/02 The ipliteral router was not recognizing addresses of the form user@
1782 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1784 PH/03 Added disable_ipv6.
1786 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1787 decoded form, because it is most often used to construct To: headers
1788 lines in autoreplies, and the decoded form may well be syntactically
1789 invalid. However, $reply_address has leading white space removed, and all
1790 newlines turned into spaces so that the autoreply transport does not
1793 PH/05 If group was specified without a user on a router, and no group or user
1794 was specified on a transport, the group from the router was ignored.
1796 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1797 for visible compile-time settings that can be used to change these
1798 numbers, for those that want even more. Backwards compatibility with old
1799 spool files has been maintained. However, going back to a previous Exim
1800 release will lost any variables that are in spool files.
1802 PH/07 Two small changes when running in the test harness: increase delay when
1803 passing a TCP/IP connection to a new process, in case the original
1804 process has to generate a bounce, and remove special handling of
1805 127.0.0.2 (sic), which is no longer necessary.
1807 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1808 be the same on different OS.
1810 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1813 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1814 whether --show-vars was specified or not
1816 JJ/02 exipick: Added support for new ACL variable spool format introduced
1819 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1820 syntactically invalid From: or Reply-to: line, and a filter used this to
1821 generate an autoreply, and therefore failed to obtain an address for the
1822 autoreply, Exim could try to deliver to a non-existent relative file
1823 name, causing unrelated and misleading errors. What now happens is that
1824 it logs this as a hard delivery error, but does not attempt to create a
1827 PH/11 The exinext utility has a -C option for testing purposes, but although
1828 the given file was scanned by exinext itself; it wasn't being passed on
1829 when Exim was called.
1831 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1832 an end-of-file indication when reading a command response.
1834 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1835 compiled. In many other places in Exim, IPv6 addresses are always
1836 recognized, so I have changed this. It also means that IPv4 domain
1837 literals of the form [IPV4:n.n.n.n] are now always recognized.
1839 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1840 used if the router is not running as root, for example, when verifying at
1841 ACL time, or when using -bh. The debugging output from this situation was
1842 non-existent - all you got was a failure to exec. I have made two
1845 (a) Failures to set uid/gid, the current directory, or a process leader
1846 in a subprocess such as that created by queryprogram now generate
1847 suitable debugging ouput when -d is set.
1849 (b) The queryprogram router detects when it is not running as root,
1850 outputs suitable debugging information if -d is set, and then runs
1851 the subprocess without attempting to change uid/gid.
1853 PH/15 Minor change to Makefile for building test_host (undocumented testing
1856 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1857 additional section of a DNS packet that returns MX or SRV records.
1858 Instead, it always explicitly searches for A/AAAA records. This avoids
1859 major problems that occur when a DNS server includes only records of one
1860 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1861 fixed another bug: if SRV records were looked up and the corresponding
1862 address records were *not* found in the additional section, the port
1863 values from the SRV records were lost.
1865 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1866 using the correct key (the original address) when searching the retry
1867 rules in order to find which one to use for generating the retry hint.
1869 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1870 adding the default one. Similarly, if it contains a Reply-To: header, the
1871 errors_reply_to option, if set, is not used.
1873 PH/19 When calculating a retry time, Exim used to measure the "time since
1874 failure" by looking at the "first failed" field in the retry record. Now
1875 it does not use this if it is later than than the arrival time of the
1876 message. Instead it uses the arrival time. This makes for better
1877 behaviour in cases where some deliveries succeed, thus re-setting the
1878 "first failed" field. An example is a quota failure for a huge message
1879 when small messages continue to be delivered. Without this change, the
1880 "time since failure" will always be short, possible causing more frequent
1881 delivery attempts for the huge message than are intended.
1882 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1884 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1885 $1, $2, $3) because the numerical variables can be reset during some
1886 expansion items (e.g. "match"), thereby losing the authentication data.
1888 PH/21 Make -bV show the size of off_t variables so that the test suite can
1889 decide whether to run tests for quotas > 2G.
1891 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1892 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1893 filecount value is greater than 2G or if a quota value is greater than 2G
1894 on a system where the size of off_t is not greater than 4, a panic error
1897 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1898 never match. The debug and -bh output now contains an explicit error
1899 message indicating a malformed IPv4 address or mask.
1901 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1902 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1903 PH/23 above applies.
1905 PH/25 Do not write to syslog when running in the test harness. The only
1906 occasion when this arises is a failure to open the main or panic logs
1907 (for which there is an explicit test).
1909 PH/26 Added the /no_tell option to "control=freeze".
1911 PH/27 If a host name lookup failed very early in a connection, for example, if
1912 the IP address matched host_lookup and the reverse lookup yielded a name
1913 that did not have a forward lookup, an error message of the form "no IP
1914 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1915 could be logged. Now it outputs the IP address instead of "NULL".
1917 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1918 allows the sender and the authenticated sender to be set when
1919 submitting a message from within Exim. Since child_open_exim() is
1920 documented for local_scan(), the new function should be too.
1922 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1923 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1924 results in an empty string is now treated as unset.
1926 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1928 PH/31 Added sender_verify_fail logging option.
1930 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1931 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1932 tidied the source and removed it altogether.
1934 PH/33 When a queue run was abandoned because the load average was too high, a
1935 log line was always written; now it is written only if the queue_run log
1936 selector is set. In addition, the log line for abandonment now contains
1937 information about the queue run such as the pid. This is always present
1938 in "start" and "stop" lines but was omitted from the "abandon" line.
1940 PH/34 Omit spaces between a header name and the colon in the error message that
1941 is given when verify = headers_syntax fails (if there are lots of them,
1942 the message gets confusing).
1944 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1945 names, as there are now some PTR records that contain slashes. This check
1946 is only to protect against broken name servers that fall over on strange
1947 characters, so the fact that it applies to all lookups doesn't matter.
1949 PH/36 Now that the new test suite is complete, we can remove some of the
1950 special code in Exim that was needed for the old test suite. For example,
1951 sorting DNS records because real resolvers return them in an arbitrary
1952 order. The new test suite's fake resolver always returns records in the
1955 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1956 bounces) except when queue_only is set, to avoid logging races between
1957 the different processes.
1959 PH/38 Panic-die if .include specifies a non-absolute path.
1961 PH/39 A tweak to the "H" retry rule from its user.
1963 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1964 a label. They prevented compilation on older perls.
1966 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1967 a warning to be raised on newish perls.
1969 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1970 on queue. Changes to match documented behaviour of showing count of
1971 messages matching specified criteria.
1973 PH/40 Changed the default ident timeout from 30s to 5s.
1975 PH/41 Added support for the use of login_cap features, on those BSD systems
1976 that have them, for controlling the resources used by pipe deliveries.
1978 PH/42 The content-scanning code uses fopen() to create files in which to put
1979 message data. Previously it was not paying any attention to the mode of
1980 the files. Exim runs with umask(0) because the rest of the code creates
1981 files with open(), and sets the required mode explicitly. Thus, these
1982 files were ending up world-writeable. This was not a big issue, because,
1983 being within the spool directory, they were not world-accessible. I have
1984 created a function called modefopen, which takes an additional mode
1985 argument. It sets umask(777), creates the file, chmods it to the required
1986 mode, then resets the umask. All the relevant calls to fopen() in the
1987 content scanning code have been changed to use this function.
1989 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1990 to 24 hours. This avoids potential overflow problems when processing G
1991 and H retry rules. I suspect nobody ever tinkers with this value.
1993 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1995 PH/45 When the plaintext authenticator is running as a client, the server's
1996 challenges are checked to ensure they are valid base64 strings. By
1997 default, the authentication attempt is cancelled if an invalid string is
1998 received. Setting client_ignore_invalid_base64 true ignores these errors.
1999 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2000 they are received. Thus, the responses can be made to depend on the
2001 challenges. If an invalid string is ignored, an empty string is placed in
2004 PH/46 Messages that are created by the autoreply transport now contains a
2005 References: header, in accordance with RFCs 2822 and 3834.
2007 PH/47 Added authenticated_sender_force to the smtp transport.
2009 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2011 PH/49 Installed latest patch from the Sieve maintainer.
2013 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2014 was also set, the appendfile transport was unnecessarily scanning a
2015 directory of message files (e.g. for maildir delivery) to find the count
2016 of files (along with the size), even though it did not need this
2017 information. It now does the scan only if it needs to find either the
2018 size of the count of files.
2020 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2022 PH/52 Two bugs concerned with error handling when the smtp transport is
2025 (i) Exim was not creating retry information for temporary errors given
2026 for individual recipients after the DATA command when the smtp transport
2027 was used in LMTP mode. This meant that they could be retried too
2028 frequently, and not timed out correctly.
2030 (ii) Exim was setting the flag that allows error details to be returned
2031 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2032 recipients that were returned after the DATA command.
2034 PH/53 This is related to PH/52, but is more general: for any failing address,
2035 when detailed error information was permitted to be returned to the
2036 sender, but the error was temporary, then after the final timeout, only
2037 "retry timeout exceeded" was returned. Now it returns the full error as
2038 well as "retry timeout exceeded".
2040 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2041 do this, and (what is worse) MTAs that accept it.
2043 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2044 will now be deprecated.
2046 PH/56 New os.c-cygwin from the Cygwin maintainer.
2048 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2049 formats (previously only available in exim formats via -bpr, -bpru,
2050 and -bpra. Now also available in native and exiqgrep formats)
2052 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2053 with very large, slow to parse queues
2055 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2057 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2059 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2060 responses to authentication challenges, though it was showing the
2061 challenges; (ii) I've removed the CR characters from the debug output for
2064 PH/58 Allow for the insertion of a newline as well as a space when a string
2065 is turned into more than one encoded-word during RFC 2047 encoding. The
2066 Sieve code now uses this.
2068 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2069 data_4xx, lost_connection, tls_required.
2071 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2072 message was being sent as an SMTP response.
2074 PH/61 Add -l and -k options to exicyclog.
2076 PH/62 When verifying, if an address was redirected to one new address, so that
2077 verification continued, and the new address failed or deferred after
2078 having set something in $address_data, the value of $address_data was not
2079 passed back to the ACL. This was different to the case when no
2080 redirection occurred. The value is now passed back in both cases.
2082 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2083 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2084 use login_cap.h, so on its own it isn't the distinguishing feature. The
2085 new name refers directly to the setclassresources() function.
2087 PH/65 Added configuration files for NetBSD3.
2089 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2091 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2092 is preferred over IPv4.
2094 PH/68 The bounce_return_message and bounce_return_body options were not being
2095 honoured for bounces generated during the reception of non-SMTP messages.
2096 In particular, this applied to messages rejected by the ACL. This bug has
2097 been fixed. However, if bounce_return_message is true and bounce_return_
2098 body is false, the headers that are returned for a non-SMTP message
2099 include only those that have been read before the error was detected.
2100 (In the case of an ACL rejection, they have all been read.)
2102 PH/69 The HTML version of the specification is now built in a directory called
2103 spec_html instead of spec.html, because the latter looks like a path with
2104 a MIME-type, and this confuses some software.
2106 PH/70 Catch two compiler warnings in sieve.c.
2108 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2109 function verify_get_ident() calls ip_connect() to connect a socket, but
2110 if the "connect()" function timed out, ip_connect() used to close the
2111 socket. However, verify_get_ident() also closes the socket later, and in
2112 between Exim writes to the log, which may get opened at this point. When
2113 the socket was closed in ip_connect(), the log could get the same file
2114 descriptor number as the socket. This naturally causes chaos. The fix is
2115 not to close the socket in ip_connect(); the socket should be closed by
2116 the function that creates it. There was only one place in the code where
2117 this was missing, in the iplookup router, which I don't think anybody now
2118 uses, but I've fixed it anyway.
2120 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2121 well as to direct DNS lookups. Otherwise the handling of names in host
2122 lists is inconsistent and therefore confusing.
2128 PH/01 Two changes to the default runtime configuration:
2130 (1) Move the checks for relay_from_hosts and authenticated clients from
2131 after to before the (commented out) DNS black list checks.
2133 (2) Add control=submission to the relay_from_hosts and authenticated
2134 clients checks, on the grounds that messages accepted by these
2135 statements are most likely to be submissions.
2137 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2139 (1) Generate an error if the third argument for the ${prvs expansion is
2142 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2145 (3) Reset the variables that are obtained from the first argument of
2146 ${prvscheck and used in the second argument before leaving the code,
2147 because their memory is reclaimed, so using them afterwards may do
2150 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2151 one (it's much easier than Tom thought :-).
2153 (5) Because of (4), we can now allow for the use of $prvscheck_result
2154 inside the third argument.
2156 PH/03 For some reason, the default setting of PATH when running a command from
2157 a pipe transport was just "/usr/bin". I have changed it to
2160 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2161 anything to be listed in the output from -bV.
2163 PH/05 When a filter generated an autoreply, the entire To: header line was
2164 quoted in the delivery log line, like this:
2166 => >A.N.Other <ano@some.domain> <original@ddress> ...
2168 This has been changed so that it extracts the operative address. There
2169 may be more than one such address. If so, they are comma-separated, like
2172 => >ano@some.domain,ona@other.domain <original@ddress> ...
2174 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2175 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2176 not being looked up in the rDNS to get a host name, Exim was showing the
2177 IP address twice in Received: lines, even though the IP addresses were
2178 identical. For example:
2180 Received: from [1.2.3.4] (helo=[1.2.3.4])
2182 However, if the real host name was known, it was omitting the HELO data
2183 if it matched the actual IP address. This has been tidied up so that it
2184 doesn't show the same IP address twice.
2186 PH/07 When both +timestamp and +memory debugging was on, the value given by
2187 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2188 called by the debug printing, thereby overwriting the timestamp buffer.
2189 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2191 PH/08 When the original message was included in an autoreply transport, it
2192 always said "this is a copy of the message, including all the headers",
2193 even if body_only or headers_only was set. It now gives an appropriate
2196 PH/09 Applied a patch from the Sieve maintainer which:
2198 o fixes some comments
2199 o adds the (disabled) notify extension core
2200 o adds some debug output for the result of if/elsif tests
2201 o points to the current vacation draft in the documentation
2202 and documents the missing references header update
2206 o fixes a bug in processing the envelope test (when testing
2207 multiple envelope elements, the last element determinted the
2210 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2211 Electronic Mail") by including:
2213 Auto-submitted: auto-generated
2215 in the messages that it generates (bounce messages and others, such as
2216 warnings). In the case of bounce messages for non-SMTP mesages, there was
2217 also a typo: it was using "Auto_submitted" (underscore instead of
2218 hyphen). Since every message generated by Exim is necessarily in response
2219 to another message, thes have all been changed to:
2221 Auto-Submitted: auto-replied
2223 in accordance with these statements in the RFC:
2225 The auto-replied keyword:
2227 - SHOULD be used on messages sent in direct response to another
2228 message by an automatic process,
2230 - MUST NOT be used on manually-generated messages,
2232 - MAY be used on Delivery Status Notifications (DSNs) and Message
2233 Disposition Notifications (MDNs),
2235 - MUST NOT be used on messages generated by automatic or periodic
2236 processes, except for messages which are automatic responses to
2239 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2240 to the default Received: header definition.
2242 PH/12 Added log selector acl_warn_skipped (default on).
2244 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2245 variables because (a) they are in the wrong storage pool and (b) even if
2246 they were copied, it wouldn't work properly because of the caching.
2248 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2249 checking when decoding. Apparently there are clients that generate
2250 overlong encoded strings. Why am I not surprised?
2252 PH/15 If the first argument of "${if match_address" was not empty, but did not
2253 contain an "@" character, Exim crashed. Now it writes a panic log message
2254 and treats the condition as false.
2256 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2258 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2259 extension "envelope-auth". The code is finished and in agreement with
2260 other implementations, but there is no documentation so far and in fact,
2261 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2262 not changing the active code.
2264 Print executed "if" and "elsif" statements when debugging is used. This
2265 helps a great deal to understand what a filter does.
2267 Document more things not specified clearly in RFC3028. I had all this
2268 sorted out, when out of a sudden new issues came to my mind. Oops."
2270 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2273 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2274 canonical form (as documented). However, after a host name lookup from
2275 the IP address, check_host() was doing a simple string comparison with
2276 addresses acquired from the DNS when checking that the found name did
2277 have the original IP as one of its addresses. Since any found IPv6
2278 addresses are likely to be in abbreviated form, the comparison could
2279 fail. Luckily, there already exists a function for doing the comparison
2280 by converting both addresses to binary, so now that is used instead of
2281 the text comparison.
2283 PH/20 There was another similar case to PH/19, when a complete host name was
2284 given in a host list; looking up its IP address could give an abbreviated
2285 form, whereas the current host's name might or might not be abbreviated.
2286 The same fix has been applied.
2292 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2293 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2296 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2297 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2299 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2301 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2302 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2303 Also, for "Auto-Submitted", treat anything other than "no" as
2304 non-personal, in accordance with RFC 3834. (Previously it treated
2305 anything starting "auto-" as non-personal.)
2307 TF/01 The control=submission/name=... option had a problem with syntax
2308 errors if the name included a slash character. The /name= option
2309 now slurps the rest of the string, so it can include any characters
2310 but it must come last in the list of options (after /sender_retain
2313 PH/05 Some modifications to the interface to the fake nameserver for the new
2321 TK/01 Added the "success_on_redirect" address verification option. See
2322 NewStuff for rationale and an example.
2324 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2326 PH/02 Patch to exigrep to allow it to work on syslog lines.
2328 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2329 fread() to skip over the body file's header line, because in Cygwin the
2330 header line is locked and is inaccessible.
2332 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2333 co-exist for some time) to make it clear that it is the Exim ID that is
2334 referenced, not the Message-ID: header line.
2336 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2337 string_format() function, because snprintf() does not exist on all
2340 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2341 ${stat: expansion item.
2343 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2344 protocol synchronization error", to keep the pedants happy.
2346 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2347 well as for IRIX systems, when gcc is being used. See the host.c source
2350 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2352 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2355 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2356 transport and to the smtp transport in LMTP mode.
2358 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2360 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2361 run a filter in a subprocess. This could lead to confusion in subsequent
2362 lookups in the parent process. There should also be a search_tidyup() at
2363 the end of the subprocess.
2365 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2366 only if the host matched helo_try_verify_hosts, which caused the
2367 verification to occur when the EHLO/HELO command was issued. The ACL just
2368 tested the remembered result. Now, if a previous verification attempt has
2369 not happened, "verify = helo" does it there and then.
2371 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2373 TK/03 Fix log output including CR from clamd.
2375 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2376 exist provoked a memory error which could cause a segfault.
2378 PH/15 Installed PCRE 6.2
2380 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2382 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2383 of the problem. Specifically, suggested +O2 rather than +O1 for the
2386 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2388 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2389 record, the port was not correctly logged when the outgoing_port log
2390 selector was set (it logged the transort's default port).
2392 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2393 fallback_hosts, and "hosts" in the smtp transport.
2395 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2396 host errors such as "Connection refused".
2398 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2399 authentication with radiusclient 0.4.9:
2401 - Error returned from rc_read_config was caught wrongly
2402 - Username/password not passed on to radius server due to wrong length.
2404 The presumption is that some radiusclient API changes for 4.51/PH/17
2405 were not taken care of correctly. The code is still untested by me (my
2406 Linux distribution still has 0.3.2 of radiusclient), but it was
2407 contributed by a Radius user.
2409 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2410 expanding the "port" option of the smtp transport.
2412 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2413 while reading a MIME header. Thanks to Tom Hughes for a patch.
2415 PH/24 Include config.h inside local_scan.h so that configuration settings are
2418 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2419 that in an ACL for RCPT (for example), you can examine exactly what was
2422 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2423 commands, but it was not correctly comparing the address with the actual
2424 client host address. Thus, it would show the EHLO address in Received:
2425 header lines when this was not necessary.
2427 PH/27 Added the % operator to ${eval:}.
2429 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2430 it should be ignoring failures (because with -C, for example, it has lost
2431 privilege). It wasn't ignoring creation failures other than "already
2434 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2437 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2438 because an input line was too long, either on its own, or by virtue of
2439 too many continuations, the temporary file was not being removed, and the
2440 return code was incorrect.
2442 PH/31 Missing "BOOL" in function definition in filtertest.c.
2444 PH/32 Applied Sieve patches from the maintainer.
2446 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2448 PH/33 Added "verify = not_blind".
2450 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2451 Local/Makefile (with some defaults set). These are used in built scripts
2452 such as exicyclog, but they have never been used in the exim_install
2453 script (though there are many overriding facilities there). I have
2454 arranged that the exim_install script now takes note of these two
2457 PH/35 Installed configuration files for Dragonfly.
2459 PH/36 When a locally submitted message by a trusted user did not contain a
2460 From: header, and the sender address was obtained from -f or from an SMTP
2461 MAIL command, and the trusted user did not use -F to supply a sender
2462 name, $originator_name was incorrectly used when constructing a From:
2463 header. Furthermore, $originator_name was used for submission mode
2464 messages from external hosts without From: headers in a similar way,
2465 which is clearly wrong.
2467 PH/37 Added control=suppress_local_fixups.
2469 PH/38 When log_selector = +received_sender was set, and the addition of the
2470 sender made the log line's construction buffer exactly full, or one byte
2471 less than full, an overflow happened when the terminating "\n" was
2474 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2475 when the result of a list match is failure because a DNS lookup failed.
2477 PH/40 RM_COMMAND is now used in the building process.
2479 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2480 the "build-* directories that it finds.
2482 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2483 address in a domain literal was a prefix of an interface address.
2485 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2486 when verifying a sender address, unless rewrite_headers is false.
2488 PH/44 Wrote a long comment about why errors_to addresses are verified as
2489 recipients, not senders.
2491 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2492 the ratelimit ACL was added.
2494 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2496 PH/46 Added extra information about PostgreSQL errors to the error string.
2498 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2499 avoiding the need to install special zones in a real server. This is
2500 backwards compatible; if it can't find the fake resolver, it drops back.
2501 Thus, both old and new test suites can be run.
2503 TF/02 Added util/ratelimit.pl
2505 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2506 clock is set back in time.
2508 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2509 Candler <B.Candler@pobox.com>.
2511 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2512 OK for addresses that are the result of redirections.
2514 PH/48 A number of further additions for the benefit of the new test suite,
2515 including a fake gethostbyname() that interfaces to the fake DNS resolver
2518 TF/06 The fix for widen_domains has also been applied to qualify_single and
2519 search_parents which are the other dnslookup options that can cause
2522 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2525 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2527 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2528 service" if it encountered an MX record with an empty target hostname.
2529 The message is now "an MX or SRV record indicated no SMTP service".
2531 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2532 if the DNS of the sending site is misconfigured. This is quite a
2533 common situation. This change restores the behaviour of treating a
2534 helo verification defer as a failure.
2536 PH/51 If self=fail was set on a router, the bounce message did not include the
2537 actual error message.
2543 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2545 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2546 command itself ended in error, the underlying message about the transport
2547 filter timeout was being overwritten with the pipe command error. Now the
2548 underlying error message should be appended to the second error message.
2550 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2552 PH/02 Reduce the amount of output that "make" produces by default. Full output
2553 can still be requested.
2555 PH/03 The warning log line about a condition test deferring for a "warn" verb
2556 was being output only once per connection, rather than after each
2557 occurrence (because it was using the same function as for successful
2558 "warn" verbs). This seems wrong, so I have changed it.
2560 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2561 it should not have, which might have caused a crash in the right
2562 circumstances, but probably never did.
2564 PH/04 Installed a modified version of Tony Finch's patch to make submission
2565 mode fix the return path as well as the Sender: header line, and to
2566 add a /name= option so that you can make the user's friendly name appear
2569 TF/03 Added the control = fakedefer ACL modifier.
2571 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2572 Mark Lowes for thorough testing.
2574 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2576 TK/03 Merged latest SRS patch from Miles Wilton.
2578 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2579 with the definition in sysexits.h (which is #included earlier).
2580 Fortunately, Exim does not actually use EX_OK. The code used to try to
2581 preserve the sysexits.h value, by assumimg that macro definitions were
2582 scanned for macro replacements. I have been disabused of this notion,
2583 so now the code just undefines EX_OK before #including unistd.h.
2585 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2586 in the smtp transport. When a block could not be written in a single
2587 write() function, the timeout was being re-applied to each part-write.
2588 This seems wrong - if the receiver was accepting one byte at a time it
2589 would take for ever. The timeout is now adjusted when this happens. It
2590 doesn't have to be particularly precise.
2592 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2593 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2595 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2596 without a domain if the check to <postmaster@domain> fails.
2598 SC/01 Eximstats: added -xls and the ability to specify output files
2599 (patch written by Frank Heydlauf).
2601 SC/02 Eximstats: use FileHandles for outputing results.
2603 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2605 SC/04 Eximstats: fixed display of large numbers with -nvr option
2607 SC/05 Eximstats: fixed merging of reports with empty tables.
2609 SC/06 Eximstats: added the -include_original_destination flag
2611 SC/07 Eximstats: removed tabs and trailing whitespace.
2613 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2615 TK/06 MBOX spool code: Add real "From " MBOX separator line
2616 so the .eml file is really in mbox format (even though
2617 most programs do not really care). Patch from Alex Miller.
2619 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2620 The latter is generated from $received_to and is only set if the
2621 message has one envelope recipient. SA can use these headers,
2622 obviously out-of-the-box. Patch from Alex Miller.
2624 PH/08 The ${def test on a variable was returning false if the variable's
2625 value was "0", contrary to what the specification has always said!
2626 The result should be true unless the variable is empty.
2628 PH/09 The syntax error of a character other than { following "${if
2629 def:variable_name" (after optional whitespace) was not being diagnosed.
2630 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2631 accidental colon was present, for example, could give incorrect results.
2633 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2634 result is used (not including appendfile, where other changes are about
2637 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2638 This involved changing a lot of size variables from int to off_t. It
2639 should work with maildirs and everything.
2641 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2642 spamd dying while we are connected to it.
2644 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2647 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2648 function for BDB 4.3.
2650 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2652 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2653 the sources for PCRE have been re-arranged and more files are now
2656 PH/15 The code I had for printing potentially long long variables in PH/11
2657 above was not the best (it lost precision). The length of off_t variables
2658 is now inspected at build time, and an appropriate printing format (%ld
2659 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2660 to be "long long int" or "long int". This is needed for the internal
2661 formatting function string_vformat().
2663 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2664 the configuration file to be ":syslog", then the script "guesses" where
2665 the logs files are, rather than using the compiled in default. In our
2666 case the guess is not the same as the compiled default, so the script
2667 suddenly stopped working when I started to use syslog. The patch checks
2668 to see if log_file_path is "". If so, it attempts to read it from exim
2669 with no configuration file to get the compiled in version, before it
2670 falls back to the previous guessing code."
2672 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2673 implementing BATV in an Exim configuration. See NewStuff for the gory
2676 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2677 Makefile that are specific to HP-UX.
2679 PH/18 If the "use_postmaster" option was set for a recipient callout together
2680 with the "random" option, the postmaster address was used as the MAIL
2681 FROM address for the random test, but not for the subsequent recipient
2682 test. It is now used for both.
2684 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2685 patch removes a few documentation additions to RFC 3028, because the
2686 latest draft now contains them. It adds the new en;ascii-case comparator
2687 and a new error check for 8bit text in MIME parts. Comparator and
2688 require names are now matched exactly. I enabled the subaddress
2689 extension, but it is not well tested yet (read: it works for me)."
2691 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2692 rework some of the code of TK/09 above to avoid the hardwired use of
2693 "%lld" and "long long". Replaced the call to snprintf() with a call to
2696 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2697 records point to non-existent hosts", "retry timeout exceeded", and
2698 "retry time not reached for any host after a long failure period".
2700 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2701 experimental DomainKeys support:
2703 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2704 (2) On an error such as an illegally used "control", the wrong name for
2705 the control was given.
2707 These problems did NOT occur unless DomainKeys support was compiled.
2709 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2711 PH/24 Added ${if match_ip condition.
2713 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2714 databases so that it will be absolutely obvious if a crash occurs in the
2715 DB library. This is a regular occurrence (often caused by mis-matched
2718 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2719 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2720 picked up on a user's system that detects such things. There doesn't seem
2721 to be a gcc warning option for this - only an attribute that has to be
2722 put on the function's prototype. It seems that in Fedora Core 4 they have
2723 set this on a number of new functions. No doubt there will be more in due
2726 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2727 specify a transport. However, if an address that was verified by such a
2728 router was the subject of a callout, Exim crashed because it tried to
2729 read the rcpt_include_affixes from the non-existent transport. Now it
2730 just assumes that the setting of that option is false. This bug was
2731 introduced by 4.51/PH/31.
2733 PH/28 Changed -d+all to exclude +memory, because that information is very
2734 rarely of interest, but it makes the output a lot bigger. People tend to
2735 do -d+all out of habit.
2737 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2738 code in os-type was giving problems when libc.so lives in lib64, like on
2741 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2742 aren't the modern standard, and it seems that some systems' include files
2743 don't always have them. Exim was already checking for some of the newer
2744 ones like T_AAAA, and defining it itself. I've added checks for all the
2745 record types that Exim uses.
2747 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2748 not automatically generating a new one, as it is supposed to. This
2749 prevented TLS from working. If the file did exist, but contained invalid
2750 data, a new version was generated, as expected. It was only the case of a
2751 non-existent file that was broken.
2753 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2754 with a change in libdomainkeys > 0.64.
2756 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2757 from DNS. If the selector record carries the flag, it now has
2758 precedence over the domain-wide flag.
2760 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2762 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2763 the use of a port name that isn't defined in /etc/services) occurred, the
2764 message was deferred as in a normal delivery, and thus remained on the
2765 spool, instead of being failed because of the mua_wrapper setting. This
2766 is now fixed, and I tidied up some of the mua_wrapper messages at the
2769 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2770 the messages in a hash of arrays rather than using individual hashes.
2771 This is a bit cleaner and results in dramatic memory savings, albeit
2772 at a slight CPU cost.
2774 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2775 as requested by Marc Sherman.
2777 SC/10 Eximstats: added histograms for user specified patterns as requested
2780 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2782 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2783 fopen() in the content-scanning modules that did not already have it.
2789 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2790 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2792 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2794 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2796 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2797 to test Sieve filters that use "vacation".
2799 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2800 that changes the way the GnuTLS parameters are stored in the cache file.
2801 The new format can be generated externally. For backward compatibility,
2802 if the data in the cache doesn't make sense, Exim assumes it has read an
2803 old-format file, and it generates new data and writes a new file. This
2804 means that you can't go back to an older release without removing the
2807 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2808 work if there are any delivery delays because "one_time" forces the
2809 parent to be marked "delivered", so its unseen clone is never tried
2810 again. For this reason, Exim now forbids the simultaneous setting of
2813 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2814 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2815 entry if you want to know the details. The fix, however, neglected to
2816 consider the case when local delivery batching is involved. The test for
2817 "previously delivered" was not happening when checking to see if an
2818 address could be batched with a previous (undelivered) one; under
2819 certain circumstances this could lead to multiple deliveries to the same
2822 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2823 in its include files, and this causes problems building Exim.
2825 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2826 header_syntax) but Exim was just ignoring anything given after a slash.
2827 In particular, this caused confusion with an attempt to use "verify =
2828 reverse_host_lookup/defer_ok". An error is now given when options are
2829 supplied for verify items that do not have them. (Maybe reverse_host_
2830 lookup should have a defer_ok option, but that's a different point.)
2832 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2833 defined by RFC 821) to 2048, because there were problems with some AUTH
2834 commands, and RFC 1869 says the size should be increased for extended
2835 SMTP commands that take arguments.
2837 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2840 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2841 "unknown" error; now it says that the functionality isn't in the binary.
2843 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2844 an address' error message when a string expansion fails (syntax or
2845 whatever). Otherwise the password may appear in the log. Following change
2846 PH/42 below, there is no longer a chance of it appearing in a bounce
2849 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2851 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2852 of its addresses was ever tried. (Bugzilla bug #2.)
2854 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2855 the result incorrectly in the debug output. (It correctly added a newline
2856 to what was transported.)
2858 TF/01 Added $received_time.
2860 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2861 commented out examples of how to interface to a virus scanner and to
2862 SpamAssassin. Also added commented examples of av_scanner and
2863 spamd_address settings.
2865 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2866 and controls are allowed in which ACLs. There were a couple of minor
2867 errors. Some of the entries in the conditions table (which is a table of
2868 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2869 negation of where the condition IS allowed.
2871 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2873 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2874 header file does not have a version number, so I've had to invent a new
2875 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2876 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2877 radiusclient), but it was contributed by a Radius user.
2879 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2880 files or directories, for OpenSSL.
2882 PH/19 When an Exim process that is running as root has to create an Exim log
2883 file, it does so in a subprocess that runs as exim:exim so as to get the
2884 ownership right at creation (otherwise, other Exim processes might see
2885 the file with the wrong ownership). There was no test for failure of this
2886 fork() call, which would lead to the process getting stuck as it waited
2887 for a non-existent subprocess. Forks do occasionally fail when resources
2888 run out. I reviewed all the other calls to fork(); they all seem to check
2891 PH/20 When checking for unexpected SMTP input at connect time (before writing
2892 the banner), Exim was not dealing correctly with a non-positive return
2893 from the read() function. If the client had disconnected by this time,
2894 the result was a log entry for a synchronization error with an empty
2895 string after "input=" when read() returned zero. If read() returned -1
2896 (an event I could not check), uninitialized data bytes were printed.
2897 There were reports of junk text (parts of files, etc) appearing after
2900 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2902 PH/22 Added support for macro redefinition, and (re)definition in between
2903 driver and ACL definitions.
2905 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2906 forgetting to use the resulting value; it was using the unexpanded value.
2908 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2909 hadn't been configured. The fix is from Juergen Kreileder, who
2910 understands it better than I do:
2912 "Here's what I see happening with three configured cyrus_sasl
2913 authenticators configured (plain, login, cram-md5):
2915 On startup auth_cyrus_sasl_init() gets called for each of these.
2916 This means three calls to sasl_listmech() without a specified mech_list.
2917 => SASL tests which mechs of all available mechs actually work
2918 => three warnings about OTP not working
2919 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2921 With the patch, sasl_listmech() also gets called three times. But now
2922 SASL's mech_list option is set to the server_mech specified in the the
2923 authenticator. Or in other words, the answer from sasl_listmech()
2924 gets limited to just the mech you're testing for (which is different
2926 => the return list contains just 'plain' or 'login', 'cram-md5' or
2927 nothing depending on the value of ob->server_mech.
2929 I've just tested the patch: Authentication still works fine,
2930 unavailable mechs specified in the exim configuration are still
2931 caught, and the auth.log warnings about OTP are gone."
2933 PH/25 When debugging is enabled, the contents of the command line are added
2934 to the debugging output, even when log_selector=+arguments is not
2937 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2938 answer is "GNU", and only if the return is "GNU/something" is the answer
2941 PH/27 $acl_verify_message is now set immediately after the failure of a
2942 verification in an ACL, and so is available in subsequent modifiers. In
2943 particular, the message can be preserved by coding like this:
2945 warn !verify = sender
2946 set acl_m0 = $acl_verify_message
2948 Previously, $acl_verify_message was set only while expanding "message"
2949 and "log_message" when a very denied access.
2951 PH/28 Modified OS/os.c-Linux with
2953 -#ifndef OS_LOAD_AVERAGE
2954 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2956 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2957 nomenclature these days.)
2959 PH/29 Installed patch from the Sieve maintainer that adds the options
2960 sieve_useraddress and sieve_subaddress to the redirect router.
2962 PH/30 In these circumstances:
2963 . Two addresses routed to the same list of hosts;
2964 . First host does not offer TLS;
2965 . First host accepts first address;
2966 . First host gives temporary error to second address;
2967 . Second host offers TLS and a TLS session is established;
2968 . Second host accepts second address.
2969 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2970 and peerdn, if requested) that were in fact used only for the second
2973 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2974 attention to any local part prefix or suffix that was matched by the
2975 router that accepted the address. It now behaves in the same way as it
2976 does for delivery: the affixes are removed from the local part unless
2977 rcpt_include_affixes is set on the transport.
2979 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2980 timeout during the DATA phase of an incoming message.
2982 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2983 applied a patch sanctioned by the Sieve maintainer.
2985 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2986 the uid or gid is negative. A case of a negative gid caused this to be
2987 noticed. The fix allows for either to be negative.
2989 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2990 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2993 PH/36 The change PH/12 above was broken. Fixed it.
2995 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2996 the grounds that routing the same address twice would always produce the
2997 same answer. This might have been true once, but it is certainly no
2998 longer true now. Routing a child address may depend on the previous
2999 routing that produced that child. Some complicated redirection strategies
3000 went wrong when messages had multiple recipients, and made Exim's
3001 behaviour dependent on the order in which the addresses were given.
3003 I have moved the duplicate checking until after the routing is complete.
3004 Exim scans the addresses that are assigned to local and remote
3005 transports, and removes any duplicates. This means that more work will be
3006 done, as duplicates will always all be routed, but duplicates are
3007 presumably rare, so I don't expect this is of any significance.
3009 For deliveries to pipes, files, and autoreplies, the duplicate checking
3010 still happens during the routing process, since they are not going to be
3013 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3014 It corrects a timeout issue with spamd. This is Ian's comment: "The
3015 background is that sometimes spamd either never reads data from a
3016 connection it has accepted, or it never writes response data. The exiscan
3017 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3018 blindly assumes that writes won't block so it may never time out."
3020 PH/39 Allow G after quota size as well as K and M.
3022 PH/40 The value set for $authenticated_id in an authenticator may not contain
3023 binary zeroes or newlines because the value is written to log lines and
3024 to spool files. There was no check on this. Now the value is run through
3025 the string_printing() function so that such characters are converted to
3026 printable escape sequences.
3028 PH/41 $message_linecount is a new variable that contains the total number of
3029 lines in the message. Compare $body_linecount, which is the count for the
3032 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3033 bounce and delay warning messages, except in certain special cases, which
3036 (a) An SMTP error message from a remote host;
3037 (b) A message specified in a :fail: redirection;
3038 (c) A message specified in a "fail" command in a system filter;
3039 (d) A message specified in a FAIL return from the queryprogram router;
3040 (e) A message specified by the cannot_route_message router option.
3042 In these cases only, Exim does include the error details in bounce and
3043 warning messages. There are also a few cases where bland messages such
3044 as "unrouteable address" or "local delivery error" are given.
3046 PH/43 $value is now also set for the "else" part of a ${run expansion.
3048 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3049 being worked on, but at least Exim now implements the latest version to
3052 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3053 process to complete was treated as a delivery failure, a timeout while
3054 writing the message to the pipe was logged, but erroneously treated as a
3055 successful delivery. Such timeouts include transport filter timeouts. For
3056 consistency with the overall process timeout, these timeouts are now
3057 treated as errors, giving rise to delivery failures by default. However,
3058 there is now a new Boolean option for the pipe transport called
3059 timeout_defer, which, if set TRUE, converts the failures into defers for
3060 both kinds of timeout. A transport filter timeout is now identified in
3063 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3064 systems where "make" and "gmake" are different, calling "gmake" at top
3065 level broke things. I've arranged for the value of $(MAKE) to be passed
3066 from the Makefile to this script so that it can call the same version of
3070 A note about Exim versions 4.44 and 4.50
3071 ----------------------------------------
3073 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3074 changes of various kinds. As a consequence, a big documentation update was
3075 needed. This delayed the release for rather longer than seemed good, especially
3076 in the light of a couple of (minor) security issues. Therefore, the changes
3077 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3078 release. So 4.44 and 4.50 are in effect two different branches that both start
3081 I have left the 4.50 change log unchanged; it contains all the changes since
3082 4.43. The change log for 4.44 is below; many of its items are identical to
3083 those for 4.50. This seems to be the most sensible way to preserve the
3084 historical information.
3090 1. Minor wording change to the doc/README.SIEVE file.
3092 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3093 computation of the current number of files was incorrect.
3095 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3096 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3099 4. Give more explanation in the error message when the command for a transport
3100 filter fails to execute.
3102 5. There are several places where Exim runs a non-Exim command in a
3103 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3104 was being done only for the command run by the queryprogram router. It is
3105 now done for all such subprocesses. The other cases are: ${run, transport
3106 filters, and the commands run by the lmtp and pipe transports.
3108 6. Added CONFIGURE_GROUP build-time option.
3110 7. Some older OS have a limit of 256 on the maximum number of file
3111 descriptors. Exim was using setrlimit() to set 1000 as a large value
3112 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3113 systems. I've change it so that if it can't get 1000, it tries for 256.
3115 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3116 was an oversight, and furthermore, ever since the addition of extra
3117 controls (e.g. 4.43/32), the checks on when to allow different forms of
3118 "control" were broken. There should now be diagnostics for all cases when a
3119 control that does not make sense is encountered.
3121 9. Added the /retain_sender option to "control=submission".
3123 10. $recipients is now available in the predata ACL (oversight).
3125 11. Tidy the search cache before the fork to do a delivery from a message
3126 received from the command line. Otherwise the child will trigger a lookup
3127 failure and thereby defer the delivery if it tries to use (for example) a
3128 cached ldap connection that the parent has called unbind on.
3130 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3131 of $address_data from the recipient verification was clobbered by the
3132 sender verification.
3134 13. The value of address_data from a sender verification is now available in
3135 $sender_address_data in subsequent conditions in the ACL statement.
3137 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3139 15. Added a new option "connect=<time>" to callout options, to set a different
3142 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3143 was its contents. (It was OK if the option was not defined at all.)
3145 17. A "Completed" log line is now written for messages that are removed from
3146 the spool by the -Mrm option.
3148 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3149 information about exactly what failed.
3151 19. Added -dd to debug only the daemon process.
3153 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3154 handles timeouts, both on the server side and network timeouts. Renamed the
3155 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3157 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3158 It is now set to "smtps".
3160 22. $host_address is now set to the target address during the checking of
3161 ignore_target_hosts.
3163 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3164 being passed; this would have caused $sender_host_name to have been used if
3165 matching the list had actually called for a host name (not very likely,
3166 since this list is usually IP addresses). A host name is now passed as
3169 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3170 code that specifies a non-restarting handler (typically sigaction() in
3171 modern systems) in an attempt to fix a rare and obscure crash bug.
3173 25. Narrowed the window for a race in the daemon that could cause it to ignore
3174 SIGCHLD signals. This is not a major problem, because they are used only to
3175 wake it up if nothing else does.
3177 26. A malformed maildirsize file could cause Exim to calculate negative values
3178 for the mailbox size or file count. Odd effects could occur as a result.
3179 The maildirsize information is now recalculated if the size or filecount
3182 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3183 support for a long time. Removed HAVE_SYS_VFS_H.
3185 28. Installed the latest version of exipick from John Jetmore.
3187 29. In an address list, if the pattern was not a regular expression, an empty
3188 subject address (from a bounce message) matched only if the pattern was an
3189 empty string. Non-empty patterns were not even tested. This was the wrong
3190 because it is perfectly reasonable to use an empty address as part of a
3191 database query. An empty address is now tested by patterns that are
3192 lookups. However, all the other forms of pattern expect the subject to
3193 contain a local part and a domain, and therefore, for them, an empty
3194 address still always fails if the pattern is not itself empty.
3196 30. Exim went into a mad DNS loop when attempting to do a callout where the
3197 host was specified on an smtp transport, and looking it up yielded more
3198 than one IP address.
3200 31. Re-factored the code for checking spool and log partition space into a
3201 function that finds that data and another that does the check. The former
3202 is then used to implement four new variables: $spool_space, $log_space,
3203 $spool_inodes, and $log_inodes.
3205 32. The RFC2047 encoding function was originally intended for short strings
3206 such as real names; it was not keeping to the 75-character limit for
3207 encoded words that the RFC imposes. It now respects the limit, and
3208 generates multiple encoded words if necessary. To be on the safe side, I
3209 have increased the buffer size for the ${rfc2047: expansion operator from
3212 33. It is now permitted to omit both strings after an "if" condition; if the
3213 condition is true, the result is "true". As before, when the second string
3214 is omitted, a false condition yields an empty string. This makes it less
3215 cumbersome to write custom ACL and router conditions.
3217 34. Failure to deliver a bounce message always caused it to be frozen, even if
3218 there was an errors_to setting on the router. The errors_to setting is now
3221 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3222 canonical form (fully expanded) before being placed in
3223 $sender_host_address.
3225 36. The table in the code that translates DNS record types into text (T_A to
3226 "A" for instance) was missing entries for NS and CNAME. It is just possible
3227 that this could have caused confusion if both these types were looked up
3228 for the same domain, because the text type is used as part of Exim's
3229 per-process caching. But the chance of anyone hitting this buglet seems
3232 37. The dnsdb lookup has been extended in a number of ways.
3234 (1) There is a new type, "zns", which walks up the domain tree until it
3235 finds some nameserver records. It should be used with care.
3237 (2) There is a new type, "mxh", which is like "mx" except that it returns
3238 just the host names, not the priorities.
3240 (3) It is now possible to give a list of domains (or IP addresses) to be
3241 looked up. The behaviour when one of the lookups defers can be
3242 controlled by a keyword.
3244 (4) It is now possible to specify the separator character for use when
3245 multiple records are returned.
3247 38. The dnslists ACL condition has been extended: it is now possible to supply
3248 a list of IP addresses and/or domains to be looked up in a particular DNS
3251 39. Added log_selector=+queue_time_overall.
3253 40. When running the queue in the test harness, wait just a tad after forking a
3254 delivery process, to get repeatability of debugging output.
3256 41. Include certificate and key file names in error message when GnuTLS fails
3257 to set them up, because the GnuTLS error message doesn't include the name
3258 of the failing file when there is a problem reading it.
3260 42. Allow both -bf and -bF in the same test run.
3262 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3264 44. The "Exiscan patch" is now merged into the mainline Exim source.
3266 45. Sometimes the final signoff response after QUIT could fail to get
3267 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3268 < 0 before doing a fflush(). This bug looks as though it goes back to the
3269 introduction of TLS in release 3.20, but "sometimes" must have been rare
3270 because the tests only now provoked it.
3272 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3273 (this can affect the format of dates).
3275 47. exim_tidydb, when checking for the continued existence of a message for
3276 which it has found a message-specific retry record, was not finding
3277 messages that were in split spool directories. Consequently, it was
3278 deleting retry records that should have stayed in existence.
3280 48. Steve fixed some bugs in eximstats.
3282 49. The SPA authentication driver was not abandoning authentication and moving
3283 on to the next authenticator when an expansion was forced to fail,
3284 contradicting the general specification for all authenticators. Instead it
3285 was generating a temporary error. It now behaves as specified.
3287 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3288 (the order specifies the preference for clients). The order is now AES256,
3289 AES128, 3DES, ARCFOUR128.
3291 51. Small patch to Sieve code - explicitly set From: when generating an
3294 52. Exim crashed if a remote delivery caused a very long error message to be
3295 recorded - for instance if somebody sent an entire SpamAssassin report back
3296 as a large number of 550 error lines. This bug was coincidentally fixed by
3297 increasing the size of one of Exim's internal buffers (big_buffer) that
3298 happened as part of the Exiscan merge. However, to be on the safe side, I
3299 have made the code more robust (and fixed the comments that describe what
3302 53. Now that there can be additional text after "Completed" in log lines (if
3303 the queue_time_overall log selector is set), a one-byte patch to exigrep
3304 was needed to allow it to recognize "Completed" as not the last thing in
3307 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3308 patch that reportedly fixes this has been added. I am not expert enough to
3309 create a test for it. This is what the patch creator wrote:
3311 "I found a little strange behaviour of ldap code when working with
3312 Windows 2003 AD Domain, where users was placed in more than one
3313 Organization Units. When I tried to give exim partial DN, the exit code
3314 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3315 But simultaneously result of request was absolutely normal ldap result,
3316 so I produce this patch..."
3318 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3319 REFERENCE, so I have modified the code to exclude the patch when that macro
3322 55. Some experimental protocols are using DNS PTR records for new purposes. The
3323 keys for these records are domain names, not reversed IP addresses. The
3324 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3325 leaves it alone. Component reversal etc. now happens only for IP addresses.
3328 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3330 57. Double the size of the debug message buffer (to 2048) so that more of very
3331 long debug lines gets shown.
3333 58. The exicyclog utility now does better if the number of log files to keep
3334 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3336 59. Two changes related to the smtp_active_hostname option:
3338 (1) $smtp_active_hostname is now available as a variable.
3339 (2) The default for smtp_banner uses $smtp_active_hostname instead
3340 of $primary_hostname.
3342 60. The host_aton() function is supposed to be passed a string that is known
3343 to be a valid IP address. However, in the case of IPv6 addresses, it was
3344 not checking this. This is a hostage to fortune. Exim now panics and dies
3345 if the condition is not met. A case was found where this could be provoked
3346 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3347 components; fortuitously, this particular loophole had already been fixed
3348 by change 4.50/55 above.
3350 If there are any other similar loopholes, the new check in host_aton()
3351 itself should stop them being exploited. The report I received stated that
3352 data on the command line could provoke the exploit when Exim was running as
3353 exim, but did not say which command line option was involved. All I could
3354 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3355 running as the user.
3358 61. There was a buffer overflow vulnerability in the SPA authentication code
3359 (which came originally from the Samba project). I have added a test to the
3360 spa_base64_to_bits() function which I hope fixes it.
3363 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3364 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3366 63. The daemon start-up calls getloadavg() while still root for those OS that
3367 need the first call to be done as root, but it missed one case: when
3368 deliver_queue_load_max is set with deliver_drop_privilege. This is
3369 necessary for the benefit of the queue runner, because there is no re-exec
3370 when deliver_drop_privilege is set.
3372 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3373 This has been fixed.
3375 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3376 was in use, was not putting the data itself into the right store pool;
3377 consequently, it could be overwritten for a subsequent message in the same
3378 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3381 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3383 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3384 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3385 the function were treating the return as a boolean value, which happened to
3386 work because 0=false and not-0=true, but is not correct code.
3388 68. The host_aton() function was not handling scoped IPv6 addresses (those
3389 with, for example, "%eth0" on the end) correctly.
3391 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3392 negated items (that is, ~something) in unsigned ints. Some compilers
3393 apparently mutter when there is no cast.
3395 70. If an address verification called from an ACL failed, and did not produce a
3396 user-specific message (i.e. there was only a "system" message), nothing was
3397 put in $acl_verify_message. In this situation, it now puts the system
3400 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3401 session; change 4.31/43 added the unwanted input to the log line - except
3402 that it did not do this in the start of session case. It now does.
3404 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3405 This is wrong and can cause the other end to generate a synchronization
3406 error if it is another Exim or anything else that does the synchronization
3407 check. A QUIT command is no longer sent after a timeout.
3409 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3410 during host lookups.
3412 74. The defer_ok option of callout verification was not working if it was used
3413 when verifying addresses in header lines, that is, for this case:
3415 verify = header_sender/callout=defer_ok
3417 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3418 those file descriptors could be used for SMTP connections. If anything
3419 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3420 could be sent to the SMTP client, causing chaos. The daemon now opens
3421 stdin, stdout, and stderr to /dev/null when it puts itself into the
3424 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3425 log by default. The user can override this with suitable Perl magic.
3427 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3428 the log message when discard triggers, was not working for the DATA ACL or
3429 for the non-SMTP ACL.
3431 78. Error message wording change in sieve.c.
3433 79. If smtp_accept_max_per_host was set, the number of connections could be
3434 restricted to fewer than expected, because the daemon was trying to set up
3435 a new connection before checking whether the processes handling previous
3436 connections had finished. The check for completed processes is now done
3437 earlier. On busy systems, this bug wouldn't be noticed because something
3438 else would have woken the daemon, and it would have reaped the completed
3441 80. If a message was submitted locally by a user whose login name contained one
3442 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3443 It caused a spool format error. I have fixed the spool reading code. A
3444 related problem was that the "from" clause in the Received: line became
3445 illegal because of the space(s). It is now covered by ${quote_local_part.
3447 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3450 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3452 83. Patch from Sieve maintainer to fix unterminated string problem in
3453 "vacation" handling.
3455 84. Some minor changes to the Linux configuration files to help with other
3456 OS variants using glibc.
3458 85. One more patch for Sieve to update vacation handling to latest spec.
3461 ----------------------------------------------------
3462 See the note above about the 4.44 and 4.50 releases.
3463 ----------------------------------------------------
3469 1. Change 4.43/35 introduced a bug that caused file counts to be
3470 incorrectly computed when quota_filecount was set in an appendfile
3473 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3474 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3477 3. Give more explanation in the error message when the command for a transport
3478 filter fails to execute.
3480 4. There are several places where Exim runs a non-Exim command in a
3481 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3482 was being done only for the command run by the queryprogram router. It is
3483 now done for all such subprocesses. The other cases are: ${run, transport
3484 filters, and the commands run by the lmtp and pipe transports.
3486 5. Some older OS have a limit of 256 on the maximum number of file
3487 descriptors. Exim was using setrlimit() to set 1000 as a large value
3488 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3489 systems. I've change it so that if it can't get 1000, it tries for 256.
3491 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3492 was an oversight, and furthermore, ever since the addition of extra
3493 controls (e.g. 4.43/32), the checks on when to allow different forms of
3494 "control" were broken. There should now be diagnostics for all cases when a
3495 control that does not make sense is encountered.
3497 7. $recipients is now available in the predata ACL (oversight).
3499 8. Tidy the search cache before the fork to do a delivery from a message
3500 received from the command line. Otherwise the child will trigger a lookup
3501 failure and thereby defer the delivery if it tries to use (for example) a
3502 cached ldap connection that the parent has called unbind on.
3504 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3505 of $address_data from the recipient verification was clobbered by the
3506 sender verification.
3508 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3509 was its contents. (It was OK if the option was not defined at all.)
3511 11. A "Completed" log line is now written for messages that are removed from
3512 the spool by the -Mrm option.
3514 12. $host_address is now set to the target address during the checking of
3515 ignore_target_hosts.
3517 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3518 being passed; this would have caused $sender_host_name to have been used if
3519 matching the list had actually called for a host name (not very likely,
3520 since this list is usually IP addresses). A host name is now passed as
3523 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3524 code that specifies a non-restarting handler (typically sigaction() in
3525 modern systems) in an attempt to fix a rare and obscure crash bug.
3527 15. Narrowed the window for a race in the daemon that could cause it to ignore
3528 SIGCHLD signals. This is not a major problem, because they are used only to
3529 wake it up if nothing else does.
3531 16. A malformed maildirsize file could cause Exim to calculate negative values
3532 for the mailbox size or file count. Odd effects could occur as a result.
3533 The maildirsize information is now recalculated if the size or filecount
3536 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3537 support for a long time. Removed HAVE_SYS_VFS_H.
3539 18. Updated exipick to current release from John Jetmore.
3541 19. Allow an empty sender to be matched against a lookup in an address list.
3542 Previously the only cases considered were a regular expression, or an
3545 20. Exim went into a mad DNS lookup loop when doing a callout where the
3546 host was specified on the transport, if the DNS lookup yielded more than
3549 21. The RFC2047 encoding function was originally intended for short strings
3550 such as real names; it was not keeping to the 75-character limit for
3551 encoded words that the RFC imposes. It now respects the limit, and
3552 generates multiple encoded words if necessary. To be on the safe side, I
3553 have increased the buffer size for the ${rfc2047: expansion operator from
3556 22. Failure to deliver a bounce message always caused it to be frozen, even if
3557 there was an errors_to setting on the router. The errors_to setting is now
3560 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3561 canonical form (fully expanded) before being placed in
3562 $sender_host_address.
3564 24. Updated eximstats to version 1.33
3566 25. Include certificate and key file names in error message when GnuTLS fails
3567 to set them up, because the GnuTLS error message doesn't include the name
3568 of the failing file when there is a problem reading it.
3570 26. Expand error message when OpenSSL has problems setting up cert/key files.
3573 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3574 (this can affect the format of dates).
3576 28. exim_tidydb, when checking for the continued existence of a message for
3577 which it has found a message-specific retry record, was not finding
3578 messages that were in split spool directories. Consequently, it was
3579 deleting retry records that should have stayed in existence.
3581 29. eximstats updated to version 1.35
3582 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3583 1.35 - bugfix such that pie charts by volume are generated correctly
3585 30. The SPA authentication driver was not abandoning authentication and moving
3586 on to the next authenticator when an expansion was forced to fail,
3587 contradicting the general specification for all authenticators. Instead it
3588 was generating a temporary error. It now behaves as specified.
3590 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3591 (the order specifies the preference for clients). The order is now AES256,
3592 AES128, 3DES, ARCFOUR128.
3594 31. Small patch to Sieve code - explicitly set From: when generating an
3597 32. Exim crashed if a remote delivery caused a very long error message to be
3598 recorded - for instance if somebody sent an entire SpamAssassin report back
3599 as a large number of 550 error lines. This bug was coincidentally fixed by
3600 increasing the size of one of Exim's internal buffers (big_buffer) that
3601 happened as part of the Exiscan merge. However, to be on the safe side, I
3602 have made the code more robust (and fixed the comments that describe what
3605 33. Some experimental protocols are using DNS PTR records for new purposes. The
3606 keys for these records are domain names, not reversed IP addresses. The
3607 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3608 leaves it alone. Component reversal etc. now happens only for IP addresses.
3611 34. The host_aton() function is supposed to be passed a string that is known
3612 to be a valid IP address. However, in the case of IPv6 addresses, it was
3613 not checking this. This is a hostage to fortune. Exim now panics and dies
3614 if the condition is not met. A case was found where this could be provoked
3615 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3616 components; fortuitously, this particular loophole had already been fixed
3617 by change 4.50/55 or 4.44/33 above.
3619 If there are any other similar loopholes, the new check in host_aton()
3620 itself should stop them being exploited. The report I received stated that
3621 data on the command line could provoke the exploit when Exim was running as
3622 exim, but did not say which command line option was involved. All I could
3623 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3624 running as the user.
3627 35. There was a buffer overflow vulnerability in the SPA authentication code
3628 (which came originally from the Samba project). I have added a test to the
3629 spa_base64_to_bits() function which I hope fixes it.
3632 36. The daemon start-up calls getloadavg() while still root for those OS that
3633 need the first call to be done as root, but it missed one case: when
3634 deliver_queue_load_max is set with deliver_drop_privilege. This is
3635 necessary for the benefit of the queue runner, because there is no re-exec
3636 when deliver_drop_privilege is set.
3638 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3639 was in use, was not putting the data itself into the right store pool;
3640 consequently, it could be overwritten for a subsequent message in the same
3641 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3644 38. Sometimes the final signoff response after QUIT could fail to get
3645 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3646 < 0 before doing a fflush(). This bug looks as though it goes back to the
3647 introduction of TLS in release 3.20, but "sometimes" must have been rare
3648 because the tests only now provoked it.
3654 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3655 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3656 Now it returns an integer. A number of calls were still expecting a T/F
3657 return. Fortuitously, in all cases, the tests worked in OK situations,
3658 which is the norm. However, things would have gone wrong on any write
3659 failures on the smtp file descriptor. This function is used when sending
3660 messages over SMTP and also when doing verify callouts.
3662 2. When Exim is called to do synchronous delivery of a locally submitted
3663 message (the -odf or -odi options), it no longer closes stderr before doing
3666 3. Implemented the mua_wrapper option.
3668 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3670 5. Implemented the functions header_remove(), header_testname(),
3671 header_add_at_position(), and receive_remove_recipient(), and exported them
3674 6. If an ACL "warn" statement specified the addition of headers, Exim already
3675 inserted X-ACL-Warn: at the start if there was no header name. However, it
3676 was not making this test for the second and subsequent header lines if
3677 there were newlines in the string. This meant that an invalid header could
3678 be inserted if Exim was badly configured.
3680 7. Allow an ACL "warn" statement to add header lines at the start or after all
3681 the Received: headers, as well as at the end.
3683 8. Added the rcpt_4xx retry error code.
3685 9. Added postmaster_mailfrom=xxx to callout verification option.
3687 10. Added mailfrom=xxxx to the callout verification option, for verify=
3690 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3691 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3693 12. Inserted some casts to stop certain compilers warning when using pointer
3694 differences as field lengths or precisions in printf-type calls (mostly
3695 affecting debugging statements).
3697 13. Added optional readline() support for -be (dynamically loaded).
3699 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3700 same clock tick as a message's arrival, so that its received time was the
3701 same as the "first fail" time on the retry record, and that message
3702 remained on the queue past the ultimate address timeout, every queue runner
3703 would try a delivery (because it was past the ultimate address timeout) but
3704 after another failure, the ultimate address timeout, which should have then
3705 bounced the address, did not kick in. This was a "< instead of <=" error;
3706 in most cases the first failure would have been in the next clock tick
3707 after the received time, and all would be well.
3709 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3710 being recognized when the domain list was tested by the match_domain
3711 condition in an expansion string.
3713 16. Added the ${str2b64: operator.
3715 17. Exim was always calling setrlimit() to set a large limit for the number of
3716 processes, without checking whether the existing limit was already
3717 adequate. (It did check for the limit on file descriptors.) Furthermore,
3718 errors from getrlimit() and setrlimit() were being ignored. Now they are
3719 logged to the main and panic logs, but Exim does carry on, to try to do its
3720 job under whatever limits there are.
3722 18. Imported PCRE 5.0.
3724 19. Trivial typo in log message " temporarily refused connection" (the leading
3727 20. If the log selector return_path_on_delivery was set and an address was
3728 redirected to /dev/null, the delivery process crashed because it assumed
3729 that a return path would always be set for a "successful" delivery. In this
3730 case, the whole delivery is bypassed as an optimization, and therefore no
3733 21. Internal re-arrangement: the function for sending a challenge and reading
3734 a response while authentication was assuming a zero-terminated challenge
3735 string. It's now changed to take a pointer and a length, to allow for
3736 binary data in such strings.
3738 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3740 23. Exim was not respecting finduser_retries when seeking the login of the
3741 uid under which it was called; it was always trying 10 times. (The default
3742 setting of finduser_retries is zero.) Also, it was sleeping after the final
3743 failure, which is pointless.
3745 24. Implemented tls_on_connect_ports.
3747 25. Implemented acl_smtp_predata.
3749 26. If the domain in control=submission is set empty, Exim assumes that the
3750 authenticated id is a complete email address when it generates From: or
3751 Sender: header lines.
3753 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3754 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3755 chown and chgrp in /bin and hostname in /usr/bin.
3757 28. Exim was keeping the "process log" file open after each use, just as it
3758 does for the main log. This opens the possibility of it remaining open for
3759 long periods when the USR1 signal hits a daemon. Occasional processlog
3760 errors were reported, that could have been caused by this. Anyway, it seems
3761 much more sensible not to leave this file open at all, so that is what now
3764 29. The long-running daemon process does not normally write to the log once it
3765 has entered its main loop, and it closes the log before doing so. This is
3766 so that log files can straightforwardly be renamed and moved. However,
3767 there are a couple of unusual error situations where the daemon does write
3768 log entries, and I had neglected to close the log afterwards.
3770 30. The text of an SMTP error response that was received during a remote
3771 delivery was being truncated at 512 bytes. This is too short for some of
3772 the long messages that one sometimes sees. I've increased the limit to
3775 31. It is now possible to make retry rules that apply only when a message has a
3776 specific sender, in particular, an empty sender.
3778 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3779 it possible to be selective about when SMTP synchronization is enforced.
3781 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3783 32. Implemented hosts_connection_nolog.
3785 33. Added an ACL for QUIT.
3787 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3790 35. Added mailbox_size and mailbox_filecount to appendfile.
3792 36. Added control = no_multiline_responses to ACLs.
3794 37. There was a bug in the logic of the code that waits for the clock to tick
3795 in the case where the clock went backwards by a substantial amount such
3796 that the microsecond fraction of "now" was more than the microsecond
3797 fraction of "then" (but the whole seconds number was less).
3799 38. Added support for the libradius Radius client library this is found on
3800 FreeBSD (previously only the radiusclient library was supported).
3806 1. When certain lookups returned multiple values in the form name=value, the
3807 quoting of the values was not always being done properly. Specifically:
3808 (a) If the value started with a double quote, but contained no whitespace,
3810 (b) If the value contained whitespace other than a space character (i.e.
3811 tabs or newlines or carriage returns) it was not quoted.
3812 This fix has been applied to the mysql and pgsql lookups by writing a
3813 separate quoting function and calling it from the lookup code. The fix
3814 should probably also be applied to nisplus, ibase and oracle lookups, but
3815 since I cannot test any of those, I have not disturbed their existing code.
3817 2. A hit in the callout cache for a specific address caused a log line with no
3818 reason for rejecting RCPT. Now it says "Previous (cached) callout
3819 verification failure".
3821 3. There was an off-by-one bug in the queryprogram router. An over-long
3822 return line was truncated at 256 instead of 255 characters, thereby
3823 overflowing its buffer with the terminating zero. As well as fixing this, I
3824 have increased the buffer size to 1024 (and made a note to document this).
3826 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3827 when Exim is waiting for an SMTP response from a remote server, Exim
3828 restarts its select() call on the socket, thereby resetting its timeout.
3829 This is not a problem when such interrupts are rare. Somebody set up a cron
3830 job to run exiwhat every 2 minutes, which is less than the normal select()
3831 timeout (5 or 10 minutes). This meant that the select() timeout never
3832 kicked in because it was always reset. I have fixed this by comparing the
3833 time when an interrupt arrives with the time at the start of the first call
3834 to select(). If more time than the timeout has elapsed, the interrupt is
3835 treated as a timeout.
3837 5. Some internal re-factoring in preparation for the addition of Sieve
3838 extensions (by MH). In particular, the "personal" test is moved to a
3839 separate function, and given an option for scanning Cc: and Bcc: (which is
3840 not set for Exim filters).
3842 6. When Exim created an email address using the login of the caller as the
3843 local part (e.g. when creating a From: or Sender: header line), it was not
3844 quoting the local part when it contained special characters such as @.
3846 7. Installed new OpenBSD configuration files.
3848 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3849 try to make them clearer.
3851 9. Callout options, other than the timeout value, were being ignored when
3852 verifying sender addresses in header lines. For example, when using
3854 verify = header_sender/callout=no_cache
3856 the cache was (incorrectly) being used.
3858 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3859 only the Cygwin environment.
3861 11. When return_path_on_delivery was set as a log selector, if different remote
3862 addresses in the same message used different return paths and parallel
3863 remote delivery occurred, the wrong values would sometimes be logged.
3864 (Whenever a remote delivery process finished, the return path value from
3865 the most recently started remote delivery process was logged.)
3867 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3868 lines when AUTH and/or TLS are in use. This is the "received protocol"
3869 field. Exim used to use "asmtp" for authenticated SMTP, without any
3870 indication (in the protocol name) for TLS use. Now it follows the RFC and
3871 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3872 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3873 names appear in log lines as well as in Received: header lines.
3875 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3876 extensions, and comparison tests, and to fix some bugs.
3878 14. Changes to the "personal" filter test:
3880 (1) The test was buggy in that it was just doing the equivalent of
3881 "contains" tests on header lines. For example, if a user's address was
3882 anne@some.where, the "personal" test would incorrectly be true for
3884 To: susanne@some.where
3886 This test is now done by extracting each address from the header in turn,
3887 and checking the entire address. Other tests that are part of "personal"
3888 are now done using regular expressions (for example, to check local parts
3889 of addresses in From: header lines).
3891 (2) The list of non-personal local parts in From: addresses has been
3892 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3893 taken from the Sieve specification recommendations.
3895 (3) If the message contains any header line starting with "List-" it is
3896 treated as non-personal.
3898 (4) The test for "circular" in the Subject: header line has been removed
3899 because it now seems ill-conceived.
3901 15. Minor typos in src/EDITME comments corrected.
3903 16. Installed latest exipick from John Jetmore.
3905 17. If headers_add on a router specified a text string that was too long for
3906 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3907 of string_sprintf() is now avoided.
3909 18. $message_body_size was not set (it was always zero) when running the DATA
3910 ACL and the local_scan() function.
3912 19. For the "mail" command in an Exim filter, no default was being set for
3913 the once_repeat time, causing a random time value to be used if "once" was
3914 specified. (If the value happened to be <= 0, no repeat happened.) The
3915 default is now 0s, meaning "never repeat". The "vacation" command was OK
3916 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3917 (I found it when inspecting the code).
3919 20. There is now an overall timeout for performing a callout verification. It
3920 defaults to 4 times the callout timeout, which applies to individual SMTP
3921 commands during the callout. The overall timeout applies when there is more
3922 than one host that can be tried. The timeout is checked before trying the
3923 next host. This prevents very long delays if there are a large number of
3924 hosts and all are timing out (e.g. when the network connections are timing
3925 out). The value of the overall timeout can be changed by specifying an
3926 additional sub-option for "callout", called "maxwait". For example:
3928 verify = sender/callout=5s,maxwait=20s
3930 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3931 to the end before writing, but this should make it even safer).
3933 22. Exim was forgetting that it had advertised PIPELINING for the second and
3934 subsequent messages on an SMTP connection. It was also not resetting its
3935 memory on STARTTLS and an internal HELO.
3937 23. When Exim logs an SMTP synchronization error within a session, it now
3938 records whether PIPELINING has been advertised or not.
3940 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3941 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3942 rather than long int.
3944 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3946 26. Added the never_mail option to autoreply.
3952 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3953 crash if the getsockname() call failed; this can happen if a connection is
3954 closed very soon after it is established. The problem was simply in the
3955 order in which certain operations were done, causing Exim to try to write
3956 to the SMTP stream before it had set up the file descriptor. The bug has
3957 been fixed by making things happen in the correct order.
3963 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3964 before the connection was closed, thus losing the rejection response.
3966 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3967 some early Solaris releases, but causes trouble in current releases where
3968 socklen_t is defined.
3970 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3973 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3976 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3977 that releasing the top of it at the end releases what was used for sub-
3978 expansions (unless the block got too big). However, discard this block if
3979 the first thing is a variable or header, so that we can use its block when
3980 it is dynamic (useful for very large $message_headers, for example).
3982 6. Lookups now cache *every* query, not just the most recent. A new, separate
3983 store pool is used for this. It can be recovered when all lookup caches are
3984 flushed. Lookups now release memory at the end of their result strings.
3985 This has involved some general refactoring of the lookup sources.
3987 7. Some code has been added to the store_xxx() functions to reduce the amount
3988 of flapping under certain conditions.
3990 8. log_incoming_interface used to affect only the <= reception log lines. Now
3991 it causes the local interface and port to be added to several more SMTP log
3992 lines, for example "SMTP connection from", and rejection lines.
3994 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3996 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3998 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3999 could be overwritten at the end of the current message (or the start of a
4000 new message if it was set in a HELO ACL). The value is now preserved for
4001 the duration of the SMTP connection.
4003 12. If a transport had a headers_rewrite setting, and a matching header line
4004 contained an unqualified address, that address was qualified, even if it
4005 did not match any rewriting rules. The underlying bug was that the values
4006 of the flags that permit the existence of unqualified sender and recipient
4007 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4008 non-local messages, and by -bnq for local messages) were not being
4009 preserved with the message after it was received.
4011 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4012 "next input=" as part of the text comprising the host identity instead of
4013 the correct text. The code was using the same buffer for two different
4014 strings. However, depending on which order the printing function evaluated
4015 its arguments, the bug did not always show up. Under Linux, for example, my
4016 test suite worked just fine.
4018 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4019 doesn't work with some older versions of Perl. It has been changed to "my",
4020 which in any case is probably the better facility to use.
4022 15. A really picky compiler found some instances of statements for creating
4023 error messages that either had too many or two few arguments for the format
4026 16. The size of the buffer for calls to the DNS resolver has been increased
4027 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4028 for addresses that have a lot of PTR records. This alleviates a problem; it
4029 does not fully solve it.
4031 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4032 buffer now truncates the list and logs the incident, which is the same
4033 action as happens when Exim is looking up a host name and its aliases.
4034 Previously in this situation something unpredictable would happen;
4035 sometimes it was "internal error: store_reset failed".
4037 18. If a server dropped the connection unexpectedly when an Exim client was
4038 using GnuTLS and trying to read a response, the client delivery process
4039 crashed while trying to generate an error log message.
4041 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4042 string, for example:
4044 warn message = H1: something\nH2: something
4046 the text was added as a single header line from Exim's point of view
4047 though it ended up OK in the delivered message. However, searching for the
4048 second and subsequent header lines using $h_h2: did not work. This has been
4049 fixed. Similarly, if a system filter added multiple headers in this way,
4050 the routers could not see them.
4052 20. Expanded the error message when iplsearch is called with an invalid key to
4053 suggest using net-iplsearch in a host list.
4055 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4056 ACLs are no longer actually imposed (and a message to that effect is
4059 22. If a "gecos" field in a passwd entry contained escaped characters, in
4060 particular, if it contained a \" sequence, Exim got it wrong when building
4061 a From: or a Sender: header from that name. A second bug also caused
4062 incorrect handling when an unquoted " was present following a character
4063 that needed quoting.
4065 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4066 was not being matched caselessly.
4068 24. Arranged for all hyphens in the exim.8 source to be escaped with
4071 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4072 properly. Recipient callout cache records were still being keyed to include
4073 the sender, even when use_sender was set false. This led to far more
4074 callouts that were necessary. The sender is no longer included in the key
4075 when use_sender is false.
4077 26. Added "control = submission" modifier to ACLs.
4079 27. Added the ${base62d: operator to decode base 62 numbers.
4081 28. dnsdb lookups can now access SRV records.
4083 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4084 the configuration file.
4086 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4087 (-v) mode. This makes the output for a verbose queue run more intelligible.
4089 31. Added a use_postmaster feature to recipient callouts.
4091 32. Added the $body_zerocount variable, containing the number of binary zero
4092 bytes in the message body.
4094 33. The time of last modification of the "new" subdirectory is now used as the
4095 "mailbox time last read" when there is a quota error for a maildir
4098 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4100 35. Added +ignore_unknown as a special item in host lists.
4102 36. Code for decoding IPv6 addresses in host lists is now included, even if
4103 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4104 address was recognized as an IP address, but was then not correctly decoded
4105 into binary, causing unexpected and incorrect effects when compared with
4112 1. Very minor rewording of debugging text in manualroute to say "list of
4113 hosts" instead of "hostlist".
4115 2. If verify=header_syntax was set, and a header line with an unqualified
4116 address (no domain) and a large number of spaces between the end of the
4117 name and the colon was received, the reception process suffered a buffer
4118 overflow, and (when I tested it) crashed. This was caused by some obsolete
4119 code that should have been removed. The fix is to remove it!
4121 3. When running in the test harness, delay a bit after writing a bounce
4122 message to get a bit more predictability in the log output.
4124 4. Added a call to search_tidyup() just before forking a reception process. In
4125 theory, someone could use a lookup in the expansion of smtp_accept_max_
4126 per_host which, without the tidyup, could leave open a database connection.
4128 5. Added the variables $recipient_data and $sender_data which get set from a
4129 lookup success in an ACL "recipients" or "senders" condition, or a router
4130 "senders" option, similar to $domain_data and $local_part_data.
4132 6. Moved the writing of debug_print from before to after the "senders" test
4135 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4136 problems for message scanning, either using a data ACL, or using
4137 local_scan() because the Received: header was not generated till after they
4138 were called (in order to set the time as the time of reception completion).
4139 I have revised the way this works. The header is now generated after the
4140 body is received, but before the ACL or local_scan() are called. After they
4141 are run, the timestamp in the header is updated.
4147 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4148 before starting a queue runner without re-exec. This happened only when
4149 deliver_drop_privilege was set or when the Exim user was set to root. The
4150 effect of the bug was that timeouts during subsequent deliveries caused
4151 crashes instead of being properly handled. The handler is now left at its
4152 default (and expected) setting.
4154 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4155 message, again when deliver_drop_privilege is set or Exim is run as root.
4156 The bug described in (1) was not present in this case, but the tidying up
4157 of the other signals was missing. I have made the two cases consistent.
4159 3. The ignore_target_hosts setting on a manualroute router was being ignored
4160 for hosts that were looked up using the /MX notation.
4162 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4165 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4166 operated on the sender address. After changing the $sender_address to <>
4167 for the sender address verify, Exim was re-instated it as the original
4168 (before rewriting) address, but remembering that it had rewritten it, so it
4169 wasn't rewriting it again. This bug also had the effect of breaking the
4170 sender address verification caching when the sender address was rewritten.
4172 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4173 This has been changed so that if the ip literal address matches
4174 ignore_target_hosts, the router declines.
4176 7. Added expansion conditions match_domain, match_address, and match_local_
4177 part (NOT match_host).
4179 8. The placeholder for the Received: header didn't have a length field set.
4181 9. Added code to Exim itself and to exim_lock to test for a specific race
4182 condition that could lead to file corruption when using MBX delivery. The
4183 issue is with the lockfile that is created in /tmp. If this file is removed
4184 after a process has opened it but before that process has acquired a lock,
4185 there is the potential for a second process to recreate the file and also
4186 acquire a lock. This could lead to two Exim processes writing to the file
4187 at the same time. The added code performs the same test as UW imapd; it
4188 checks after acquiring the lock that its file descriptor still refers to
4189 the same named file.
4191 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4192 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4195 11. Added the smtp_active_hostname option. If used, this will typically be made
4196 to depend on the incoming interface address. Because $interface_address is
4197 not set up until the daemon has forked a reception process, error responses
4198 that can happen earlier (such as "too many connections") no longer contain
4201 12. If an expansion in a condition on a "warn" statement fails because a lookup
4202 defers, the "warn" statement is abandoned, and the next ACL statement is
4203 processed. Previously this caused the whole ACL to be aborted.
4205 13. Added the iplsearch lookup type.
4207 14. Added ident_timeout as a log selector.
4209 15. Added tls_certificate_verified as a log selector.
4211 16. Added a global option tls_require_ciphers (compare the smtp transport
4212 option of the same name). This controls incoming TLS connections.
4214 17. I finally figured out how to make tls_require_ciphers do a similar thing
4215 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4216 before starting the TLS session.
4218 18. Tabs are now shown as \t in -bP output.
4220 19. If the log selector return_path_on_delivery was set, Exim crashed when
4221 bouncing a message because it had too many Received: header lines.
4223 20. If two routers both had headers_remove settings, and the first one included
4224 a superfluous trailing colon, the final name in the first list and the
4225 first name in the second list were incorrectly joined into one item (with a
4226 colon in the middle).
4232 1. Added -C and -D options to the exinext utility, mainly to make it easier
4233 to include in the automated testing, but these could be helpful when
4234 multiple configurations are in use.
4236 2. The exinext utility was not formatting the output nicely when there was
4237 an alternate port involved in the retry record key, nor when there was a
4238 message id as well (for retries that were specific to a specific message
4239 and a specific host). It was also confused by IPv6 addresses, because of
4240 the additional colons they contain. I have fixed the IPv4 problem, and
4241 patched it up to do a reasonable job for IPv6.
4243 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4244 delivery, the log line now contains "pipelined" if PIPELINING was used.
4246 4. An SMTP transport process used to panic and die if the bind() call to set
4247 an explicit outgoing interface failed. This has been changed; it is now
4248 treated in the same way as a connect() failure.
4250 5. A reference to $sender_host_name in the part of a conditional expansion
4251 that was being skipped was still causing a DNS lookup. This no longer
4254 6. The def: expansion condition was not recognizing references to header lines
4255 that used bh_ and bheader_.
4257 7. Added the _cache feature to named lists.
4259 8. The code for checking quota_filecount in the appendfile transport was
4260 allowing one more file than it should have been.
4262 9. For compatibility with Sendmail, the command line option
4270 and sets the incoming protocol and host name (for trusted callers). The
4271 host name and its colon can be omitted when only the protocol is to be set.
4272 Note the Exim already has two private options, -pd and -ps, that refer to
4273 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4274 "s", but I don't think that's a major issue.
4276 10. A number of refactoring changes to the code, none of which should affect
4279 (a) The number of logging options was getting close to filling up the
4280 32-bit word that was used as a bit map. I have split them into two classes:
4281 those that are passed in the argument to log_write(), and those that are
4282 only ever tested independently outside of that function. These are now in
4283 separate 32-bit words, so there is plenty of room for expansion again.
4284 There is no change in the user interface or the logging behaviour.
4286 (b) When building, for example, log lines, the code previously used a
4287 macro that called string_cat() twice, in order to add two strings. This is
4288 not really sufficiently general. Furthermore, there was one instance where
4289 it was actually wrong because one of the argument was used twice, and in
4290 one call a function was used. (As it happened, calling the function twice
4291 did not affect the overall behaviour.) The macro has been replaced by a
4292 function that can join an arbitrary number of extra strings onto a growing
4295 (c) The code for expansion conditions now uses a table and a binary chop
4296 instead of a serial search (which was left over from when there were very
4297 few conditions). Also, it now recognizes conditions like "pam" even when
4298 the relevant support is not compiled in: a suitably worded error message is
4299 given if an attempt is made to use such a condition.
4301 11. Added ${time_interval:xxxxx}.
4303 12. A bug was causing one of the ddress fields not to be passed back correctly
4304 from remote delivery subprocesses. The field in question was not being
4305 subsequently used, so this caused to problems in practice.
4307 13. Added new log selectors queue_time and deliver_time.
4309 14. Might have fixed a bug in maildirsizefile handling that threw up
4310 "unexpected character" debug warnings, and recalculated the data
4311 unnecessarily. In any case, I expanded the warning message to give more
4314 15. Added the message "Restricted characters in address" to the statements in
4315 the default ACL that block characters like @ and % in local parts.
4317 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4318 Three changes have been made:
4320 (a) There was a serious bug; a negative response to MAIL caused the whole
4321 recipient domain to be cached as invalid, thereby blocking all messages
4322 to all local parts at the same domain, from all senders. This bug has
4323 been fixed. The domain is no longer cached after a negative response to
4324 MAIL if the sender used is not empty.
4326 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4329 (c) A new callout option, "use_sender" has been added for people who want
4330 the modified behaviour.
4336 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4339 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4340 indeed breaks things for older releases.
4342 3. Added additional logging to the case where there is a problem reading data
4343 from a filter that is running in a subprocess using a pipe, in order to
4344 try to track down a specific problem.
4346 4. Testing facility fudge: when running in the test harness and attempting
4347 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4348 getting "No route to host". Convert this to a timeout.
4350 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4353 6. Some OS don't have socklen_t but use size_t instead. This affects the
4354 fifth argument of getsockopt() amongst other things. This is now
4355 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4356 can be set for individual OS. I have set it for SunOS5, OSF1, and
4357 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4358 some earlier ones do not.
4360 7. Change 4.30/15 was not doing the test caselessly.
4362 8. The standard form for an IPv6 address literal was being rejected by address
4363 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4364 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4365 this, as well as the form without the "IPv6" on the front (but only when
4366 address literals are enabled, of course).
4368 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4370 10. Exim crashed if a message with an empty sender address specified by -f
4371 encountered a router with an errors_to setting. This could be provoked only
4372 by a command such as
4376 where an empty string was supplied; "<>" did not hit this bug.
4378 11. Installed PCRE release 4.5.
4380 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4381 remained set. It is now erased.
4383 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4384 times from message ids (which are base 36 rather than the normal 62).
4386 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4387 were being counted as actual protocol errors, and logged if the log
4388 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4389 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4390 and DATA following a set of rejected RCPTs do not count as protocol errors.
4391 In other words, Exim assumes they were pipelined, though this may not
4392 actually be the case. Of course, in all cases the client gets an
4393 appropriate error code.
4395 15. If a lookup fails in an ACL condition, a message about the failure may
4396 be available; it is used if testing the ACL cannot continue, because most
4397 such messages specify what the cause of the deferral is. However, some
4398 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4399 that caused an old message to be retained and used if a later statement
4400 caused a defer, replacing the real cause of the deferral.
4402 16. If an IP address had so many PTR records that the DNS lookup buffer
4403 was not large enough to hold them, Exim could crash while trying to process
4404 the truncated data. It now detects and logs this case.
4406 17. Further to 4.21/58, another change has been made: if (and only if) the
4407 first line of a message (the first header line) ends with CRLF, a bare LF
4408 in a subsequent header line has a space inserted after it, so as not to
4409 terminate the header.
4411 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4412 unnecessarily, used atoi() instead of strtol(), and didn't check the
4413 termination when getting file sizes from file names by regex.
4415 19. Completely re-implemented the support for maildirsize files, in the light
4416 of a number of problems with the previous contributed implementation
4417 (4.30/29). In particular:
4419 . If the quota is zero, the maildirsize file is maintained, but no quota is
4422 . If the maildir directory does not exist, it is created before any attempt
4423 to write a maildirsize file.
4425 . The quota value in the file is just a cache; if the quota is changed in
4426 the transport, the new value overrides.
4428 . A regular expression is available for excluding directories from the
4431 20. The autoreply transport checks the characters in options that define the
4432 message's headers; it allows continued headers, but it was checking with
4433 isspace() after an embedded newline instead of explicitly looking for a
4436 21. If all the "regular" hosts to which an address was routed had passed their
4437 expiry times, and had not reached their retry times, the address was
4438 bounced, even if fallback hosts were defined. Now Exim should go on to try
4441 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4442 equivalent code in the SMTP transport. Some hosts send humungous responses
4443 to HELO/EHLO, more than 1024 it seems.
4445 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4446 gives compiler warnings in some environments. I've now done it "properly",
4449 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4450 (because of problems with the built-in one) was declared to return uschar *
4451 instead of char *, causing compiler failure.
4453 25. Fixed a file descriptor leak when processing alias/forward files.
4455 26. Fixed a minor format string issue in dbfn.c.
4457 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4459 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4460 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4463 29. When a sender address is verified, it is cached, to save repeating the test
4464 when there is more than one recipient in a message. However, when the
4465 verification involves a callout, it is possible for different callout
4466 options to be set for different recipients. It is too complicated to keep
4467 track of this in the cache, so now Exim always runs a verification when a
4468 callout is required, relying on the callout cache for the optimization.
4469 The overhead is duplication of the address routing, but this should not be
4472 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4473 to be verified with callout=postmaster, and the main callout worked but the
4474 postmaster check failed, the verification correctly failed. However, if a
4475 subsequent RCPT command asked for sender verification *without* the
4476 postmaster check, incorrect caching caused this verification also to fail,
4479 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4480 it was not caching the DNS options (qualify_single, search_parents) that
4481 were used when the lookup failed. A subsequent lookup with different
4482 options therefore always gave the same answer, though there were cases
4483 where it should not have. (Example: a "domains = !$mx_any" option on a
4484 dnslookup router: the "domains" option is always processed without any
4485 widening, but the router might have qualify_single set.) Now Exim uses the
4486 cached value only when the same options are set.
4488 32. Added John Jetmore's "exipick" utility to the distribution.
4490 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4491 than a timeout (e.g. a certificate is required, and is not provided), an
4492 Exim server now closes the connection immediately. Previously it waited for
4493 the client to close - but if the client is SSL, it seems that they each
4494 wait for each other, leading to a delay before one of them times out.
4496 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4497 maintained 0.8.x compatibility because I don't think many are using it, and
4498 it is clearly obsolete.
4500 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4503 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4504 client certificate was expired. A simple patch fixes this, though I don't
4505 understand the full logic of why the verify callback is called multiple
4508 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4509 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4510 which causes problems with some clients (such as the Certicom SSL Plus
4511 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4512 disables the coutermeasure allowing Eudora to connect."
4514 38. Exim was not checking that a write() to a log file succeeded. This could
4515 lead to Bad Things if a log got too big, in particular if it hit a file
4516 size limit. Exim now panics and dies if it cannot write to a log file, just
4517 as it does if it cannot open a log file.
4519 39. Modified OS/Makefile-Linux so that it now contains
4521 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4523 The two -D definitions ensure that Exim is compiled with large file
4524 support, which makes it possible to handle log files that are bigger than
4527 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4528 instance) a domain was checked against a named list that involved a lookup,
4529 causing $domain_data to be set, then another domain was checked against the
4530 same list, then the first domain was re-checked, the value of $domain_data
4531 after the final check could be wrong. In particular, if the second check
4532 failed, it could be set empty. This bug probably also applied to
4535 41. The strip_trailing_dot option was not being applied to the address given
4536 with the -f command-line option.
4538 42. The code for reading a message's header from the spool was incrementing
4539 $received_count, but never initializing it. This meant that the value was
4540 incorrect (doubled) while delivering a message in the same process in which
4541 it was received. In the most common configuration of Exim, this never
4542 happens - a fresh exec is done - but it can happen when
4543 deliver_drop_privilege is set.
4545 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4546 it now includes up to 150 characters of the unexpected data in the log
4549 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4550 and building data strings. The size of both of these buffers was 10 000
4551 bytes - far larger than anybody would *ever* want, thought I. Needless to
4552 say, somebody hit the limit. I have increased the maximum line length to
4553 20 000 and the maximum data length of concatenated lines to 100 000. I have
4554 also fixed two bugs, because there was no checking on these buffers. Tsk,
4555 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4556 buffer is too small.
4558 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4559 lsearch lookups. Now it does.
4561 46. When parsing a route_list item in a manualroute router, a fixed-length
4562 buffer was used for the list of hosts. I made this 1024 bytes long,
4563 thinking that nobody would ever have a list of hosts that long. Wrong.
4564 Somebody had a whole pile of complicated expansion conditions, and the
4565 string was silently truncated, leading to an expansion error. It turns out
4566 that it is easier to change to an unlimited length (owing to other changes
4567 that have happened since this code was originally written) than to build
4568 structure for giving a limitation error. The length of the item that
4569 expands into the list of hosts is now unlimited.
4571 47. The lsearch lookup could not handle data where the length of text line was
4572 more than 4095 characters. Such lines were truncated, leading to shortened
4573 data being returned. It should now handle lines of any length.
4575 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4576 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4579 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4580 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4581 no longer happens in comment lines. A list of replacements is now placed
4582 at the head of all of the source files, except those whose only change is
4583 to replace PERL_COMMAND in the very first #! line.
4585 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4586 messages on the queue, with a bottom-up merge sort, using code contributed
4587 by Michael Haardt. This should make operations like -bp somewhat faster on
4588 large queues. It won't affect queue runners, except when queue_run_in_order
4591 51. Installed eximstats 1.31 in the distribution.
4593 52. Added support for SRV lookups to the dnslookup router.
4595 53. If an ACL referred to $message_body or $message_body_end, the value was not
4596 reset for any messages that followed in the same SMTP session.
4598 54. The store-handling optimization for building very long strings was not
4599 differentiating between the different store pools. I don't think this
4600 actually made any difference in practice, but I've tidied it.
4602 55. While running the routers to verify a sender address, $sender_address
4603 was still set to the sender address. This is wrong, because when routing to
4604 send a bounce to the sender, it would be empty. Therefore, I have changed
4605 it so that, while verifying a sender address, $sender_address is set to <>.
4606 (There is no change to what happens when verifying a recipient address.)
4608 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4609 target A or AAAA records (if not already returned) without resetting the
4610 qualify_single or search_parents options of the DNS resolver. These are
4611 inappropriate in this case because the targets of MX and SRV records must
4612 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4613 target that, when qualified, matched something in the local domain. These
4614 two options are now turned off when doing these lookups.
4616 57. It seems that at least some releases of Reiserfs (which does not have the
4617 concept of a fixed number of inodes) returns zero and not -1 for the
4618 number of available inodes. This interacted badly with check_spool_inodes,
4619 which assumed that -1 was the "no such thing" setting. What I have done is
4620 to check that the total number of inodes is greater than zero before doing
4621 the test of how many are available.
4623 58. When a "warn" ACL statement has a log_message modifier, the message is
4624 remembered, and not repeated. This is to avoid a lot of repetition when a
4625 message has many recipients that cause the same warning to be written.
4626 Howewer, Exim was preserving the list of already written lines for an
4627 entire SMTP session, which doesn't seem right. The memory is now reset if a
4628 new message is started.
4630 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4631 debugging output unless log_rewrite was also set.
4633 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4634 of (int)(handle) when we know that handle contains (void *)(-1).
4636 61. The Exim daemon panic-logs an error return when it closes the incoming
4637 connection. However "connection reset by peer" seems to be common, and
4638 isn't really an error worthy of noting specially, so that particular error
4641 62. When Exim is trying to find all the local interfaces, it used to panic and
4642 die if the ioctl to get the interface flags failed. However, it seems that
4643 on at least one OS (Solaris 9) it is possible to have an interface that is
4644 included in the list of interfaces, but for which you get a failure error
4645 for this call. This happens when the interface is not "plumbed" into a
4646 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4647 failure of the "get flags" call assumes that the interface is down.
4649 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4650 makes life easier for people who are doing arithmetic on fields extracted
4651 from dates, where you often get leading zeros that should not be
4652 interpreted as octal.
4654 64. Added qualify_domain to the redirect router, to override the global
4657 65. If a pathologically long header line contained very many addresses (the
4658 report of this problem mentioned 10 000) and each of them was rewritten,
4659 Exim could use up a very large amount of memory. (It kept on making new
4660 copies of the header line as it rewrote, and never released the old ones.)
4661 At the expense of a bit more processing, the header rewriting function has
4662 been changed so that it no longer eats memory in this way.
4664 66. The generation of the Received: header has been moved from the time that a
4665 message starts to be received, to the time that it finishes. The timestamp
4666 in the Received: header should now be very close to that of the <= log
4667 line. There are two side-effects of this change:
4669 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4670 logged header lines no longer include the local Received: line, because
4671 it has not yet been created. The same applies to a copy of the message
4672 that is returned to a non-SMTP sender when a message is rejected.
4674 (b) When a filter file is tested using -bf, no additional Received: header
4675 is added to the test message. After some thought, I decided that this
4678 This change does not affect the value of $received_for. It is still set
4679 after address rewriting, but before local_scan() is called.
4681 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4683 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4684 gave an unhelpful panic error message, and a defer error. I have managed to
4685 change this behaviour so that it now rejects any supplied certificate,
4686 which seems right, as the list of acceptable certificates is empty.
4688 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4689 gave an unhelpful defer error. I have not managed to make this reject any
4690 supplied certificates, but the error message it gives is "no certificate
4691 supplied", which is not helpful.
4693 70. exigrep's output now also includes lines that are not associated with any
4694 message, but which match the given pattern. Implemented by a patch from
4695 Martin Sluka, which also tidied up the Perl a bit.
4697 71. Recipient callout verification, like sender verification, was using <> in
4698 the MAIL FROM command. This isn't really the right thing, since the actual
4699 sender may affect whether the remote host accepts the recipient or not. I
4700 have changed it to use the actual sender in the callout; this means that
4701 the cache record is now keyed on a recipient/sender pair, not just the
4702 recipient address. There doesn't seem to be a real danger of callout loops,
4703 since a callout by the remote host to check the sender would use <>.
4704 [SEE ABOVE: changed after hitting problems.]
4706 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4707 temporary errors. However, in the case of such a code being given after
4708 the end of a data transmission (i.e. after ".") Exim was failing to write
4709 a retry record for the message. (Yes, there was some broken host that was
4710 actually sending 8xx at this point.)
4712 73. An unknown lookup type in a host list could cause Exim to panic-die when
4713 the list was checked. (An example that provoked this was putting <; in the
4714 middle of a list instead of at the start.) If this happened during a DATA
4715 ACL check, a -D file could be left lying around. This kind of configuration
4716 error no longer causes Exim to die; instead it causes a defer errror. The
4717 incident is still logged to the main and panic logs.
4719 74. Buglet left over from Exim 3 conversion. The message "too many messages
4720 in one connection" was written to the rejectlog but not the mainlog, except
4721 when address rewriting (yes!) was being logged.
4723 75. Added write_rejectlog option.
4725 76. When a system filter was run not as root (that is, when system_filter_user
4726 was set), the values of the $n variables were not being returned to the
4727 main process; thus, they were not subsequently available in the $sn
4730 77. Added +return_path_on_delivery log selector.
4732 78. A connection timeout was being treated differently from recipients deferred
4733 when testing hosts_max_try with a message that was older than the host's
4734 retry timeout. (The host should not be counted, thus allowing all hosts to
4735 be tried at least once before bouncing.) This may have been the cause of an
4736 occasionally reported bug whereby a message would remain on the queue
4737 longer than the retry timeout, but would be bounced if a delivery was
4738 forced. I say "may" because I never totally pinned down the problem;
4739 setting up timeout/retry tests is difficult. See also the next item.
4741 79. The ultimate address timeout was not being applied to errors that involved
4742 a combination of host plus message (for example, a timeout on a MAIL
4743 command). When an address resolved to a number of possible hosts, and they
4744 were not all tried for each delivery (e.g. because of hosts_max_try), a
4745 message could remain on the queue longer than the retry timeout.
4747 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4750 81. Fixed an obscure SMTP outgoing bug which required at least the following
4751 conditions: (a) there was another message waiting for the same server;
4752 (b) the server returned 5xx to all RCPT commands in the first message so
4753 that the message was not completed; (c) the server dropped the connection
4754 or gave a negative response to the RSET that Exim sends to abort the
4755 transaction. The observed case was a dropped connection after DATA that had
4756 been sent in pipelining mode. That is, the server had advertised PIPELINING
4757 but was not implementing it correctly. The effect of the bug was incorrect
4758 behaviour, such as trying another host, and this could lead to a crash.
4764 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4765 and daemon.c were passed as pointers to ints; they should have been
4766 pointers to socklen_t variables (which are typically unsigned ints).
4768 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4771 3. Fixed a really odd bug that affected only the testing scheme; patching a
4772 certain fixed string in the binary changed the value of another string that
4773 happened to be identical to the end of the original first string.
4775 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4776 name", it returns that address as the IP address. On some operating
4777 systems (e.g. Solaris), it also passes back the IP address string as the
4778 "host name". However, on others (e.g. Linux), it passes back an empty
4779 string. Exim wasn't checking for this, and was changing the host name to an
4780 empty string, assuming it had been canonicized.
4782 5. Although rare, it is permitted to have more than one PTR record for a given
4783 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4784 all the names associated with an address, because they do in Solaris.
4785 However, it seems that they do not in Linux for data that comes from the
4786 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4787 I found this out when I moved to a new Linux workstation and tried to run
4788 the Exim test suite.
4790 To get round this problem I have changed the code so that it now does its
4791 own call to the DNS to look up PTR records when searching for a host name.
4792 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4793 addresses that are only in /etc/hosts are still found.
4795 This behaviour is, however, controlled by an option called host_lookup_
4796 order, which defaults to "bydns:byaddr". If people want to use the other
4797 order, or indeed, just use one or the other means of lookup, they can
4798 specify it in this variable.
4800 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4801 some operating systems, this comes back from gethostbyaddr() as an empty
4802 string, and this is what Exim used to test for. However, it seems that in
4803 other systems, "." is yielded. Exim now tests for this case too.
4805 7. The values of check_spool_space and check_log_space are now held internally
4806 as a number of kilobytes instead of an absolute number of bytes. If a
4807 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4808 kilobyte. This means that much larger values can be stored.
4810 8. Exim monitor: an attempt to get the action menu when not actually pointing
4811 at a message produces an empty menu entitled "No message selected". This
4812 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4813 no entries in it ("Shell widget menu has zero width and/or height"). So I
4814 have added a single, blank menu entry in this case.
4816 9. Added ${quote_local_part.
4818 10. MIME decoding is now applied to the contents of Subject: header lines when
4821 11. Now that a reference to $sender_host_address automatically causes a reverse
4822 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4823 host lookup before query-style lookups in lists that might use this
4824 variable. This has therefore been abolished, and the "net-" prefix is no
4825 longer necessary for query-style lookups.
4827 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4828 have been a typo for LFLAGS, so it has been changed.
4830 13. The install script calls Exim with "-C /dev/null" in order to find the
4831 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4832 to be output. Howeve, since Exim outputs its version number before the
4833 error, it didn't break the script. It just looked ugly. I fixed this by
4834 always allowing "-C /dev/null" if the caller is root.
4836 14. Ignore overlarge ACL variable number when reading spool file - insurance
4837 against a later release with more variables having written the file.
4839 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4840 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4841 this, as well as the form without the "IPv6" on the front.
4843 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4844 OS/Makefile-Darwin file.
4846 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4847 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4849 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4850 variable. However, some OS use ints for inodes. I've added cast to long int
4851 to get rid of the compiler warning.
4853 19. I had forgotten to lock out "/../" in configuration file names when
4854 ALT_CONFIG_PREFIX was set.
4856 20. Routers used for verification do not need to specify transports. However,
4857 if such a router generated a host list, and callout was configured, Exim
4858 crashed, because it could not find a port number from the (non-existent)
4859 transport. It now assumes port 25 in this circumstance.
4861 21. Added the -t option to exigrep.
4863 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4864 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4865 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4866 them is set, LOOKUP_LSEARCH is forced.
4868 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4870 24. Added sender and host information to the "rejected by local_scan()" log
4871 line; previously there was no indication of these.
4873 25. Added .include_if_exists.
4875 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4876 Linux. It turns out that not all file systems support this. Apparently some
4877 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4878 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4879 not supported on the file descriptor, is now ignored when Exim is trying to
4880 sync a directory. This applies only to Linux.
4882 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4884 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4885 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4888 29. Added support for maildirsize files from supplied patch (modified a bit).
4890 30. The use of :fail: followed by an empty string could lead Exim to respond to
4891 sender verification failures with (e.g.):
4893 550 Verification failed for <xxx>
4894 550 Sender verify failed
4896 where the first response line was missing the '-' that indicates it is not
4897 the final line of the response.
4899 31. The loop for finding the name of the user that called Exim had a hardwired
4900 limit of 10; it now uses the value of finduser_retries, which is used for
4901 all other user lookups.
4903 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4906 33. Exim was neglecting to zero errno before one call of strtol() when
4907 expanding a string and expecting an integer value. On some systems this
4908 resulted in spurious "integer overflow" errors. Also, it was casting the
4909 result into an int without checking.
4911 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4912 did not work. The code looks as if it has *never* worked, though it appears
4913 to have been documented since at least releast 1.62. I have made it work.
4915 35. The "timeout_DNS" error in retry rules, also documented since at least
4916 1.62, also never worked. As it isn't clear exactly what this means, and
4917 clearly it isn't a major issue, I have abolished the feature by treating it
4918 as "timeout", and writing a warning to the main and panic logs.
4920 36. The display of retry rules for -brt wasn't always showing the error code
4923 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4924 timeout_connect_A, timeout_connect_MX.
4926 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4927 to the empty sender.
4929 39. The daemon was not analysing the content of -oX till after it had closed
4930 stderr and disconnected from the controlling terminal. This meant that any
4931 syntax errors were only noted on the panic log, and the return code from
4932 the command was 0. By re-arranging the code a little, I've made the
4933 decoding happen first, so such errors now appear on stderr, and the return
4934 code is 1. However, the actual setting up of the sockets still happens in
4935 the disconnected process, so errors there are still only recorded on the
4938 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4939 connections (as happens on some IP stacks) was logged at start up time as
4940 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4941 it from "IPv6 and IPv4", which means that two separate sockets are being
4944 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4945 says whether AF_INET or AF_INET6 was passed as an argument.
4947 42. Exiwhat output was messed up when time zones were included in log
4950 43. Exiwhat now gives more information about the daemon's listening ports,
4951 and whether -tls-on-connect was used.
4953 44. The "port" option of the smtp transport is now expanded.
4955 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4956 silently ignored. Now an error message is written to the main and panic
4959 46. There's a new ACL modifier called "logwrite" which writes to a log file
4960 as soon as it is encountered.
4962 47. Added $local_user_uid and $local_user_gid at routing time.
4964 48. Exim crashed when trying to verify a sender address that was being
4967 49. Exim was recognizing only a space character after ".include". It now also
4968 recognizes a tab character.
4970 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4971 extracting the relevant information from the specification. The man page no
4972 longer contains scrambled data for the -d option, and I've added a section
4973 at the front about calling Exim under different names.
4975 51. Added "extra_headers" argument to the "mail" command in filter files.
4977 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4980 53. Installed eximstats 1.29.
4982 54. Added transport_filter_timeout as a generic transport option.
4984 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4985 Cc: header lines. This was required by RFC 822, but it not required by RFC
4988 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4989 incoming messages that did not have them. Now it does so only if the
4990 message originates locally, that is, if there is no associated remote host
4991 address. When Resent- header lines are present, this applies to the Resent-
4992 lines rather than the non-Resent- lines.
4994 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4995 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4997 58. Messages for configuration errors now include the name of the main
4998 configuration file - useful now that there may be more than one file in a
4999 list (.included file names were always shown).
5001 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5002 for those rare installations that do not start the daemon as root or run it
5003 setuid root. I've cut out the call to initgroups() if the daemon is not
5006 60. The Exim user and group can now be bound into the binary as text strings
5007 that are looked up at the start of Exim's processing.
5009 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5011 62. Added $mailstore_basename variable.
5013 63. Installed patch to sieve.c from Michael Haardt.
5015 64. When Exim failed to open the panic log after failing to open the main log,
5016 the original message it was trying to log was written to stderr and debug
5017 output, but if they were not available (the usual case in production), it
5018 was lost. Now it is written to syslog before the two lines that record the
5019 failures to open the logs.
5021 65. Users' Exim filters run in subprocesses under the user's uid. It is
5022 possible for a "deliver" command or an alias in a "personal" command to
5023 provoke an address rewrite. If logging of address rewriting is configured,
5024 this fails because the process is not running as root or exim. There may be
5025 a better way of dealing with this, but for the moment (because 4.30 needs
5026 to be released), I have disabled address rewrite logging when running a
5027 filter in a non-root, non-exim process.
5033 1. The buildconfig auxiliary program wasn't quoting the value set for
5034 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5035 not defined. This bug was masked in 4.22 by the effect that was fixed in
5038 2. Some messages that were rejected after a message id was allocated were
5039 shown as "incomplete" by exigrep. It no longer does this for messages that
5040 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5042 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5043 have allow_domain_literals set, the ID did not get logged in the <= line.
5044 Domain literals are now always recognized in Message-ID: header lines.
5046 4. The first argument for a ${extract expansion item is the key name or field
5047 number. Leading and trailing spaces in this item were not being ignored,
5048 causing some misleading effects.
5050 5. When deliver_drop_privilege was set, single queue runner processes started
5051 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5052 same command in the process it spins off) were not dropping privilege.
5054 6. When the daemon running as "exim" started a queue runner, it always
5055 re-executed Exim in the spun-off process. This is a waste of effort when
5056 deliver_drop_privilege is set. The new process now just calls the
5057 queue-runner function directly.
5063 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5066 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5067 ignored. Though the use of -oP was forcing the writing of a pid file, it
5068 was always written to the default place.
5070 3. If the message "no IP address found for host xxxx" is generated during
5071 incoming verification, it is now followed by identification of the incoming
5072 connection (so you can more easily find what provoked it).
5074 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5076 5. Added some features to "harden" Exim a bit more against certain attacks:
5078 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5079 be put in Local/Makefile. This is like the never_users runtime option,
5080 but it cannot be overridden. The default setting is "root".
5082 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5083 prefix string with which any file named in a -C command line option
5086 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5087 is retained for -C and -D only if the caller of Exim is root. Without
5088 it, the exim user may also use -C and -D and retain privilege.
5090 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5091 command line option is disabled.
5093 6. Macro names set by the -D option must start with an upper case letter, just
5094 like macro names defined in the configuration file.
5096 7. Added "dereference=" facility to LDAP.
5098 8. Two instances of the typo "uknown" in the source files are fixed.
5100 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5101 the Configure-Makefile script screwed up while processing it.
5103 10. Incorporated PCRE 4.4.
5105 11. The SMTP synchronization check was not operating right at the start of an
5106 SMTP session. For example, it could not catch a HELO sent before the client
5107 waited for the greeting. There is now a check for outstanding input at the
5108 point when the greeting is written. Because of the duplex, asynchronous
5109 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5110 way, but not yet received, when the check is performed.
5112 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5113 on TCP/IP sockets, because this apparently causes some broken clients to
5116 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5117 unchanged) from the Cygwin maintainer.
5119 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5120 was supported instead of testing for mbx. Effectively a typo.
5122 15. The spa authenticator server code was not checking that the input it
5123 received was valid base64.
5125 16. The debug output line for the "set" modifier in ACLs was not showing the
5126 name of the variable that was being set.
5128 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5130 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5131 lookup on its own. Something else was needed to trigger the lookup. For
5132 example, a match in host_lookup or the need for a host name in a host list.
5133 Now, if $sender_host_name is referenced and the host name has not yet been
5134 looked up, a lookup is performed. If the lookup fails, the variable remains
5135 empty, and $host_lookup_failed is set to "1".
5137 19. Added "eqi" as a case-independent comparison operator.
5139 20. The saslauthd authentication condition could segfault if neither service
5140 nor realm was specified.
5142 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5143 error message that was logged was misleading, and incoming SMTP
5144 connections were dropped. The message is now more accurate, and temporary
5145 errors are given to SMTP connections.
5147 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5148 (except RSET) with a 421 error, until QUIT is received. However, it was
5149 failing to send a response to QUIT.
5151 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5152 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5153 ACL is now run after the helo_try_verify_hosts code.
5155 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5156 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5157 case-independent, so other case variants are also recognized). Apparently
5158 some systems use these upper case variants.
5160 25. If more than two messages were waiting for the same host, and a transport
5161 filter was specified for the transport, Exim sent two messages over the
5162 same TCP/IP connection, and then failed with "socket operation on non-
5163 socket" when it tried to send the third.
5165 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5167 27. The extern definition of crypt16() in expand.c was not being excluded when
5168 the OS had its own crypt16() function.
5170 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5171 as a preferred synonym for return_size_limit, both as an option and as an
5174 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5176 30. Changed the default configuration ACL to relax the local part checking rule
5177 for addresses that are not in any local domains. For these addresses,
5178 slashes and pipe symbols are allowed within local parts, but the sequence
5179 /../ is explicitly forbidden.
5181 31. SPA server authentication was not clearing the challenge buffer before
5184 32. log_message in a "warn" ACL statement was writing to the reject log as
5185 well as to the main log, which contradicts the documentation and doesn't
5186 seem right (because no rejection is happening). So I have stopped it.
5188 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5189 However, I am unable to do any testing of this.
5191 34. Fixed an infelicity in the appendfile transport. When checking directories
5192 for a mailbox, to see if any needed to be created, it was accidentally
5193 using path names with one or more superfluous leading slashes; tracing
5194 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5196 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5197 contents are added to the log line that is written for every discarded
5198 recipient. (Previously a log_message setting was ignored.)
5200 36. The ${quote: operator now quotes the string if it is empty.
5202 37. The install script runs exim in order to find its version number. If for
5203 some reason other than non-existence or emptiness, which it checks, it
5204 could not run './exim', it was installing it with an empty version number,
5205 i.e. as "exim-". This error state is now caught, and the installation is
5208 38. An argument was missing from the function that creates an error message
5209 when Exim fails to connect to the socket for saslauthd authentication.
5210 This could cause Exim to crash, or give a corrupted message.
5212 39. Added isip, isip4, and isip6 to ${if conditions.
5214 40. The ACL variables $acl_xx are now saved with the message, and can be
5215 accessed later in routers, transports, and filters.
5217 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5218 strings in the file are not string-expanded.
5220 42. If a MAIL command specified a SIZE value that was too large to fit into an
5221 int variable, the check against message_size_limit failed. Such values are
5222 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5223 day this will have to be increased, but I don't think I want to be around
5224 when emails are that large.
5231 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5232 iconv() is not standard in FreeBSD.
5234 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5235 IPv6 enabled. The observed symptom was a segmentation fault on return from
5236 the function os_common_find_running_interfaces() in src/os.c.
5238 3. In the check_special_case() function in daemon.c I had used "errno" as an
5239 argument name, which causes warnings on some systems. This was basically a
5240 typo, since it was named "eno" in the comments!
5242 4. The code that waits for the clock to tick (at a resolution of some fraction
5243 of a second) so as to ensure message-id uniqueness was always waiting for
5244 at least one whole tick, when it could have waited for less. [This is
5245 almost certainly not relevant at current processor speeds, where it is
5246 unlikely to ever wait at all. But we try to future-proof.]
5248 5. The function that sleeps for a time interval that includes fractions of a
5249 second contained a race. It did not block SIGALRM between setting the
5250 timer, and suspending (a couple of lines later). If the interval was short
5251 and the sigsuspend() was delayed until after it had expired, the suspension
5252 never ended. On busy systems this could lead to processes getting stuck for
5255 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5256 process, before it forks any delivery processes. The open lookup caching
5257 mechanism meant that the open file or database connection was passed into
5258 the delivery process. The problem was that delivery processes always tidy
5259 up cached lookup data. This could cause a problem for the next delivery
5260 process started by the queue runner, because the external queue runner
5261 process does not know about the closure. So the next delivery process
5262 still has data in the lookup cache. In the case of a file lookup, there was
5263 no problem because closing a file descriptor in a subprocess doesn't affect
5264 the parent. However, if the lookup was caching a connection to a database,
5265 the connection was closed, and the second delivery process was likely to
5266 see errors such as "PGSQL: query failed: server closed the connection
5267 unexpectedly". The problem has been fixed by closing all cached lookups
5268 in a queue runner before running a delivery process.
5270 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5271 seem to have the "const" qualifier which it has on other OS. I've
5274 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5275 *of the same type* (client or server) with the same public name that an
5276 error should be diagnosed.
5278 9. When Exim looked up a host name for an IP address, but failed to find the
5279 original IP address when looking up the host name (a safety check), it
5280 output the message "<ip address> does not match any IP for NULL", which was
5281 confusing, to say the least. The bug was that the host name should have
5282 appeared instead of "NULL".
5284 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5285 user that is built into the binary, and the -C or -D options is used, root
5286 privilege is dropped before the configuration file is read. In addition,
5287 logging is switched to stderr instead of the normal log files. If the
5288 configuration then re-defines the Exim user, the unprivileged environment
5289 is probably not what is expected, so Exim logs a panic warning message (but
5292 However, if deliver_drop_privilege is set, the unprivileged state may well
5293 be exactly what is intended, so the warning has been cut out in that case,
5294 and Exim is allowed to try to write to its normal log files.
5300 1. smtp_return_error_details was not giving details for temporary sender
5301 or receiver verification errors.
5303 2. Diagnose a configuration error if two authenticators have the same public
5306 3. Exim used not to create the message log file for a message until the first
5307 delivery attempt. This could be confusing when incoming messages were held
5308 for policy or load reasons. The message log file is now created at the time
5309 the message is received, and an initial "Received" line is written to it.
5311 4. The automatically generated man page for command line options had a minor
5312 bug that caused no ill effects; however, a more serious problem was that
5313 the procedure for building the man page automatically didn't always
5314 operate. Consequently, release 4.20 contains an out-of-date version. This
5315 shouldn't happen again.
5317 5. When building Exim with embedded Perl support, the script that builds the
5318 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5319 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5321 6. The freeze_tell option was not being used for messages that were frozen on
5322 arrival, either by an ACL or by local_scan().
5324 7. Added the smtp_incomplete_transaction log selector.
5326 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5327 was accepting AUTH without a new EHLO.
5329 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5330 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5333 10. Logging of TCP/IP connections (when configured) now happens in the main
5334 daemon process instead of the child process, so that the TCP/IP connection
5335 count is more accurate (but it can never be perfect).
5337 11. The use of "drop" in a nested ACL was not being handled correctly in the
5338 outer ACL. Now, if condition failure induced by the nested "drop" causes
5339 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5340 or "require"), the connection is dropped.
5342 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5343 that yield "discard" can now be used with an "accept" or a "discard" verb,
5344 but an error is generated for any others (because I can't see a useful way
5345 to define what should happen).
5347 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5348 are now processed in the same way as lines in the Exim configuration file.
5349 In particular, continuation lines are supported.
5351 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5353 15. Added -ti meaning -t -i.
5355 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5356 domains, and warn by logging if others are found.
5358 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5359 returned from GIFCONF when Exim is trying to find the list of interfaces on
5360 a host. The code in os.c has been modified to copy each ifreq to an aligned
5361 structure in all cases.
5363 Also, in some cases, the returned ifreq's were being copied to a 'struct
5364 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5365 means the last couple of bytes of an IPv6 address could be chopped if the
5366 ifreq contained only a normal sockaddr (14 bytes storage).
5368 18. Named domain lists were not supported in the hosts_treat_as_local option.
5369 An entry such as +xxxx was not recognized, and was treated as a literal
5372 19. Ensure that header lines added by a DATA ACL are included in the reject log
5373 if the ACL subsequently rejects the message.
5375 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5376 MD5 (which is deprecated).
5378 21. When testing a filter file using -bf, Exim was writing a message when it
5379 took the sender from a "From " line in the message, but it was not doing so
5380 when it took $return_path from a Return-Path: header line. It now does.
5382 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5383 with a valid header line field name (a series of printing characters
5384 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5386 23. Changed "disc" in the source to "disk" to conform to the documentation and
5387 the book and for uniformity.
5389 24. Ignore Sendmail's -Ooption=value command line item.
5391 25. When execve() failed while trying to run a command in a pipe transport,
5392 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5393 could be confused with a return value of 69 from the command itself. This
5394 has been changed to 127, the value the shell returns if it is asked to run
5395 a non-existent command. The wording for the related log line suggests a
5396 non-existent command as the problem.
5398 26. If received_header_text expands to an empty string, do not add a Received:
5399 header line to the message. (Well, it adds a token one on the spool, but
5400 marks it "old" so that it doesn't get used or transmitted.)
5402 27. Installed eximstats 1.28 (addition of -nt option).
5404 28. There was no check for failure on the call to getsockname() in the daemon
5405 code. This can fail if there is a shortage of resources on the system, with
5406 ENOMEM, for example. A temporary error is now given on failure.
5408 29. Contrary to the C standard, it seems that in some environments, the
5409 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5410 program. Exim now does this explicitly; it affects the formatting of
5411 timestamps using strftime().
5413 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5414 complaints. I've now initialized all the variables, to avoid this.
5416 32. Header lines added by a system filter were not being "seen" during
5417 transport-time rewrites.
5419 33. The info_callback() function passed to OpenSSL is set up with type void
5420 (*)(SSL *, int, int), as described somewhere. However, when calling the
5421 function (actually a macro) that sets it up, the type void(*)() is
5422 expected. I've put in a cast to prevent warnings from picky compilers.
5424 34. If a DNS black list lookup found a CNAME record, but there were no A
5425 records associated with the domain it pointed at, Exim crashed.
5427 35. If a DNS black list lookup returned more than one A record, Exim ignored
5428 all but the first. It now scans all returned addresses if a particular IP
5429 value is being sought. In this situation, the contents of the
5430 $dnslist_value variable are a list of all the addresses, separated by a
5433 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5434 to accept a host name and all its aliases if the forward lookup for any of
5435 them yielded the IP address of the incoming connection. Now it accepts only
5436 those names whose forward lookup yields the correct IP address. Any other
5437 names are discarded. This closes a loophole whereby a rogue DNS
5438 administrator could create reverse DNS records to break through a
5439 wildcarded host restriction in an ACL.
5441 37. If a user filter or a system filter that ran in a subprocess used any of
5442 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5443 the wrong values were passed to the pipe command ($thisaddress had the
5444 value of $0, $0 had the value of $1, etc). This bug was introduced by
5445 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5447 38. Improved the line breaking for long SMTP error messages from ACLs.
5448 Previously, if there was no break point between 40 and 75 characters, Exim
5449 left the rest of the message alone. Two changes have been made: (a) I've
5450 reduced the minimum length to 35 characters; (b) if it can't find a break
5451 point between 35 and 75 characters, it looks ahead and uses the first one
5452 that it finds. This may give the occasional overlong line, but at least the
5453 remaining text gets split now.
5455 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5456 file descriptors might be low, and that setting 1000 would always raise it.
5457 It turns out that in some environments, the limit is already over 1000 and
5458 that lowering it causes trouble. So now Exim takes care not to decrease it.
5460 40. When delivering a message, the value of $return_path is set to $sender_
5461 address at the start of routing (routers may change the value). By an
5462 oversight, this default was not being set up when an address was tested by
5463 -bt or -bv, which affected the outcome if any router or filter referred to
5466 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5467 log only when "message" or "log_message" are set. However, if one of the
5468 conditions was an address verification, or a call to a nested ACL, the
5469 messages generated by the underlying test were being passed through. This
5470 no longer happens. The underlying message is available in $acl_verify_
5471 message for both "message" and "log_message" expansions, so it can be
5472 passed through if needed.
5474 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5475 new expansion $bh_ to give the encoded byte string without charset
5476 translation. Translation happens only if iconv() is available; HAVE_ICONV
5477 indicates this at build time. HEADERS_CHARSET gives the charset to
5478 translate to; headers_charset can change it in the configuration, and
5479 "headers charset" can change it in an individual filter file.
5481 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5482 that creates RFC 2047 encoded "words" labels them as that charset instead
5483 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5484 expansion operator; (ii) when Exim creates a From: line for a local
5485 message; (iii) when a header line is rewritten to include a "phrase" part.
5487 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5488 buggy, causing it to skip the first lines of messages whose message ID
5489 ended in 'D'. This would not have bitten before Exim release 4.14, because
5490 message IDs were unlikely to end in 'D' before then. The effect was to have
5491 incorrect size information for certain domains.
5493 45. #include "config.h" was missing at the start of the crypt16.c module. This
5494 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5497 46. If there was a timeout during a "random" callout check, Exim treated it as
5498 a failure of the random address, and carried on sending RSET and the real
5499 address. If the delay was just some slowness somewhere, the response to the
5500 original RCPT would be taken as a response to RSET and so on, causing
5501 mayhem of various kinds.
5503 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5504 when I implemented it. It didn't allow for the fact that some option values
5505 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5506 the right test for positive values.
5508 48. Domain names in DNS records are case-independent. Exim always looks them up
5509 in lower case. Some resolvers return domain names in exactly the case they
5510 appear in the zone file, that is, they may contain uppercase letters. Not
5511 all resolvers do this - some return always lower case. Exim was treating a
5512 change of case by a resolver as a change of domain, similar to a widening
5513 of a domain abbreviation. This triggered its re-routing code and so it was
5514 trying to route what was effectively the same domain again. This normally
5515 caused routing to fail (because the router wouldn't handle the domain
5516 twice). Now Exim checks for this case specially, and just changes the
5517 casing of the domain that it ultimately uses when it transmits the message
5520 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5523 50. If a filter generated a file delivery with a non-absolute name (possible if
5524 no home directory exists for the router), the forbid_file option was not
5527 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5528 the existing equality matching.
5530 52. Exim was using ints instead of ino_t variables in some places where it was
5531 dealing with inode numbers.
5533 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5534 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5535 called TMPDIR, and if it finds it is different, it changes its value.
5537 54. The smtp_printf() function is now made available to local_scan() so
5538 additional output lines can be written before returning. There is also an
5539 smtp_fflush() function to enable the detection of a dropped connection.
5540 The variables smtp_input and smtp_batched_input are exported to
5543 55. Changed the default runtime configuration: the message "Unknown user"
5544 has been removed from the ACL, and instead placed on the localuser router,
5545 using the cannot_route_message feature. This means that any verification
5546 failures that generate their own messages won't get overridden. Similarly,
5547 the "Unrouteable address" message that was in the ACL for unverifiable
5548 relay addresses has also been removed.
5550 56. Added hosts_avoid_esmtp to the smtp transport.
5552 57. The exicyclog script was not checking for the esoteric option
5553 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5554 will work only if exicyclog is run under the appropriate euid.
5556 58. Following a discussion on the list, the rules by which Exim recognises line
5557 endings on incoming messages have been changed. The -dropcr and drop_cr
5558 options are now no-ops, retained only for backwards compatibility. The
5559 following line terminators are recognized: LF CRLF CR. However, special
5560 processing applies to CR:
5562 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5563 nor a local message in the state where . is a terminator.
5565 (ii) If a bare CR is encountered in a header line, an extra space is added
5566 after the line terminator so as not to end the header. The reasoning
5567 behind this is that bare CRs in header lines are most likely either
5568 to be mistakes, or people trying to play silly games.
5570 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5571 was being incorrectly given as 18 bytes larger than it should have been.
5572 This is a VOB (very old bug).
5574 60. This may never have affected anything current, but just in case it has:
5575 When the local host is found other than at the start of a list of hosts,
5576 the local host, those with the same MX, and any that follow, are discarded.
5577 When the list in question was part of a longer list of hosts, the following
5578 hosts (not currently being processed) were also being discarded. This no
5579 longer happens. I'm not sure if this situation could ever has previously
5582 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5585 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5586 header. This is something that is recommended in a new Internet Draft, and
5587 is something that is documented as being done by Sendmail. There are two
5588 possible values. For messages generated by the autoreply transport, Exim
5591 Auto-Submitted: auto-replied
5593 whereas for all other generated messages (e.g. bounces) it adds
5595 Auto-Submitted: auto-generated
5597 63. The "personal" condition in filters now includes a test for the
5598 Auto-Submitted: header. If it contains the string "auto-" the message it
5599 not considered personal.
5601 64. Added rcpt_include_affixes as a generic transport option.
5603 65. Added queue_only_override (default true).
5605 66. Added the syslog_duplication option.
5607 67. If what should have been the first header line of a message consisted of
5608 a space followed by a colon, Exim was mis-interpreting it as a header line.
5609 It isn't of course - it is syntactically invalid and should therefore be
5610 treated as the start of the message body. The misbehaviour could have
5611 caused a number of strange effects, including loss of data in subsequent
5612 header lines, and spool format errors.
5614 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5615 client host had authenticated. This control can now be exercised by an ACL
5616 for more flexibility.
5618 69. By default, callouts do not happen when testing with -bh. There is now a
5619 variant, -bhc, which does actually run the callout code, including
5620 consulting and updating the callout cache.
5622 70. Added support for saslauthd authentication, courtesy of Alexander
5625 71. If statvfs() failed on the spool or log directories while checking their
5626 size for availability, Exim confusingly gave the error "space shortage".
5627 Furthermore, in debugging mode it crashed with a floating point exception.
5628 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5629 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5630 serious problem, Exim now writes to the main and panic logs when this
5631 happens, with details of the failure. It then refuses to accept the
5632 incoming message, giving the message "spool directory problem" or "log
5633 directory problem" with a 421 code for SMTP messages.
5635 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5636 0, 1, and 2 exist, because some OS complain for execs without them (see
5637 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5638 descriptors. However, the code omitted to check that the open succeeded,
5639 causing mysterious errors if for some reason the permissions on /dev/null
5640 got screwed. Now Exim writes a message to the main and panic logs, and
5641 bombs out if it can't open /dev/null.
5643 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5644 interact so that it is all more flexible. It is supposed to remain
5645 backwards compatible. Also added extra_local_interfaces.
5647 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5648 to bomb out with an assertion failure - to the client this appears as a
5649 connection drop. This problem occurs in the part of the code that was taken
5650 from the Samba project. Fortunately, the assertion is in a very simple
5651 function, so I have fixed this by reproducing the function inline in the
5652 one place where it is called, and arranging for authentication to fail
5653 instead of killing the process with assert().
5655 75. The SPA client code was not working when the server requested OEM rather
5656 than Unicode encoding.
5658 76. Added code to make require_files with a specific uid setting more usable in
5659 the case where statting the file as root fails - usually a non-root-mounted
5660 NFS file system. When this happens and the failure is EACCES, Exim now
5661 forks a subprocess and does the per-uid checking as the relevant uid.
5663 77. Added process_log_path.
5665 78. If log_file_path was not explicitly set, a setting of check_log_space or
5666 check_log_inodes was ignored.
5668 79. If a space check for the spool or log partitions fails, the incident is now
5669 logged. Of course, in the latter case the data may get lost...
5671 80. Added the %p formatting code to string_format() so that it can be used to
5672 print addresses in debug_print(). Adjusted all the address printing in the
5673 debugging in store.c to use %p rather than %d.
5675 81. There was a concern that a line of code in smtp_in.c could overflow a
5676 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5677 initially expressed, the concern was not well-founded, because trailing
5678 spaces are removed early. However, if the trailing spaces were followed by
5679 a NULL, they did not get removed, so the overflow was possible. Two fixes
5682 (a) I re-wrote the offending code in a cleaner fashion.
5683 (b) If an incoming SMTP command contains a NULL character, it is rejected
5686 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5687 runs initgroups(), so that if the Exim user is in any additional groups,
5688 they will be used during message reception.
5694 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob