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.
27 PP/01 Handle short writes when writing local log-files.
28 In practice, only affects FreeBSD (8 onwards).
29 Bugzilla 1053, with thanks to Dmitry Isaikin.
31 NM/01 Bugzilla 949 - Documentation tweak
33 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
36 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
38 PP/02 Implemented gsasl authenticator.
40 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
42 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
43 `pkg-config foo` for cflags/libs.
45 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
46 with rest of GSASL and with heimdal_gssapi.
48 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
49 `pkg-config foo` for cflags/libs for the TLS implementation.
51 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
52 properties get this fed in as external SSF. A number of robustness
53 and debugging improvements to the cyrus_sasl authenticator.
55 PP/08 cyrus_sasl server now expands the server_realm option.
57 PP/09 Bugzilla 1214 - Log authentication information in reject log.
58 Patch by Jeremy Harris.
60 PP/10 Added dbmjz lookup type.
62 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
64 PP/12 MAIL args handles TAB as well as SP, for better interop with
65 non-compliant senders.
66 Analysis and variant patch by Todd Lyons.
68 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
69 Bug report from Lars Müller <lars@samba.org> (via SUSE),
70 Patch from Dirk Mueller <dmueller@suse.com>
72 PP/13 tls_peerdn now print-escaped for spool files.
73 Observed some $tls_peerdn in wild which contained \n, which resulted
74 in spool file corruption.
76 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
77 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
78 or write after TLS renegotiation, which otherwise led to messages
81 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
82 as a tracking header (ie: a signed header comes before the signature).
83 Patch from Wolfgang Breyha.
85 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
86 comma-sep list; embedded commas doubled.
88 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
90 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
92 Report and patch from Dmitry Banschikov.
94 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
95 Removed SSL_clear() after SSL_new() which led to protocol negotiation
96 failures. We appear to now support TLS1.1+ with Exim.
98 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
99 lets Exim select keys and certificates based upon TLS SNI from client.
100 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
101 before an outbound SMTP session. New log_selector, +tls_sni.
103 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
104 NULL dereference. Report and patch from Alun Jones.
106 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
107 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
108 Not seeing resolver debug output on NetBSD, but suspect this is a
109 resolver implementation change.
111 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
112 Left warnings. Added "eximon gdb" invocation mode.
114 PP/21 Defaulting "accept_8bitmime" to true, not false.
116 PP/22 Added -bw for inetd wait mode support.
118 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
119 locate the relevant includes and libraries. Made this the default.
121 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
122 Bugzilla 1246, report and most of solution from Tomasz Kusy.
124 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
125 This may cause build issues on older platforms.
127 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
128 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
129 gnutls_require_mac & gnutls_require_protocols (no longer supported).
130 Added SNI support via GnuTLS too.
131 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
133 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
135 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
136 Applied second patch from Janne, implementing suggestion to default
137 multiple-strings-in-record handling to match SPF spec.
139 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
141 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
142 read-only, out of scope).
143 Patch from Wolfgang Breyha, report from Stuart Northfield.
145 PP/29 Fix three issues highlighted by clang analyser static analysis.
146 Only crash-plausible issue would require the Cambridge-specific
147 iplookup router and a misconfiguration.
148 Report from Marcin Mirosław.
150 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
152 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
153 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
154 As part of this, removing so much warning spew let me fix some minor
155 real issues in debug logging.
157 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
158 assignment on my part. Fixed.
160 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
161 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
162 Janne Snabb (who went above and beyond: thank you).
164 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
165 string otherwise requires a connection and a bunch more work and it's
166 relatively easy to get wrong. Should also expose TLS library linkage
169 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
170 64-bit ${eval} (JH/03).
172 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
173 GNU libc to support some of the 64-bit stuff, should not lead to
174 conflicts. Defined before os.h is pulled in, so if a given platform
175 needs to override this, it can.
177 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
178 protection layer was required, which is not implemented.
179 Bugzilla 1254, patch from Wolfgang Breyha.
181 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
182 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
183 tls_dhparam take prime identifiers. Also unbreak combination of
184 OpenSSL+DH_params+TLSSNI.
186 PP/39 Disable SSLv2 by default in OpenSSL support.
192 PP/01 Solaris build fix for Oracle's LDAP libraries.
193 Bugzilla 1109, patch from Stephen Usher.
195 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
197 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
200 TF/02 Fix a couple more cases where we did not log the error message
201 when unlink() failed. See also change 4.74-TF/03.
203 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
204 lock up or crash if it happened to be inside a call to libc when it
205 got a SIGUSR1 from exiwhat.
207 The SIGUSR1 handler appends the current process status to the process
208 log which is later printed by exiwhat. It used to use the general
209 purpose logging code to do this, but several functions it calls are
210 not safe for signals.
212 The new output code in the SIGUSR1 handler is specific to the process
213 log, and simple enough that it's easy to inspect for signal safety.
214 Removing some special cases also simplifies the general logging code.
215 Removing the spurious timestamps from the process log simplifies
218 TF/04 Improved ratelimit ACL condition.
220 The /noupdate option has been deprecated in favour of /readonly which
221 has clearer semantics. The /leaky, /strict, and /readonly update modes
222 are mutually exclusive. The update mode is no longer included in the
223 database key; it just determines when the database is updated. (This
224 means that when you upgrde Exim will forget old rate measurements.)
226 Exim now checks that the per_* options are used with an update mode that
227 makes sense for the current ACL. For example, when Exim is processing a
228 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
229 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
230 must specify per_mail/readonly. If you omit the update mode it defaults to
231 /leaky where that makes sense (as before) or /readonly where required.
233 The /noupdate option is now undocumented but still supported for
234 backwards compatibility. It is equivalent to /readonly except that in
235 ACLs where /readonly is required you may specify /leaky/noupdate or
236 /strict/noupdate which are treated the same as /readonly.
238 A useful new feature is the /count= option. This is a generalization
239 of the per_byte option, so that you can measure the throughput of other
240 aggregate values. For example, the per_byte option is now equivalent
241 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
243 The per_rcpt option has been generalized using the /count= mechanism
244 (though it's more complicated than the per_byte equivalence). When it is
245 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
246 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
247 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
248 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
249 Note that using per_rcpt with a non-readonly update mode in more than
250 one ACL will cause the recipients to be double-counted. (The per_mail
251 and per_byte options don't have this problem.)
253 The handling of very low rates has changed slightly. If the computed rate
254 is less than the event's count (usually one) then this event is the first
255 after a long gap. In this case the rate is set to the same as this event's
256 count, so that the first message of a spam run is counted properly.
258 The major new feature is a mechanism for counting the rate of unique
259 events. The new per_addr option counts the number of different
260 recipients that someone has sent messages to in the last time period. It
261 behaves like per_rcpt if all the recipient addresses are different, but
262 duplicate recipient addresses do not increase the measured rate. Like
263 the /count= option this is a general mechanism, so the per_addr option
264 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
265 example, measure the rate that a client uses different sender addresses
266 with the options per_mail/unique=$sender_address. There are further
267 details in the main documentation.
269 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
271 TF/06 Removed a few PCRE remnants.
273 TF/07 Automatically extract Exim's version number from tags in the git
274 repository when doing development or release builds.
276 PP/02 Raise smtp_cmd_buffer_size to 16kB.
277 Bugzilla 879. Patch from Paul Fisher.
279 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
280 Heavily based on revision 40f9a89a from Simon Arlott's tree.
283 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
285 PP/05 Variable $av_failed, true if the AV scanner deferred.
286 Bugzilla 1078. Patch from John Horne.
288 PP/06 Stop make process more reliably on build failure.
289 Bugzilla 1087. Patch from Heiko Schlittermann.
291 PP/07 Make maildir_use_size_file an _expandable_ boolean.
292 Bugzilla 1089. Patch from Heiko Schlittermann.
294 PP/08 Handle ${run} returning more data than OS pipe buffer size.
295 Bugzilla 1131. Patch from Holger Weiß.
297 PP/09 Handle IPv6 addresses with SPF.
298 Bugzilla 860. Patch from Wolfgang Breyha.
300 PP/10 GnuTLS: support TLS 1.2 & 1.1.
302 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
305 PP/11 match_* no longer expand right-hand-side by default.
306 New compile-time build option, EXPAND_LISTMATCH_RHS.
307 New expansion conditions, "inlist", "inlisti".
309 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
311 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
313 PP/14 fix log_write() format string regression from TF/03.
314 Bugzilla 1152. Patch from Dmitry Isaikin.
320 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
322 PP/02 Harmonised TLS library version reporting; only show if debugging.
323 Layout now matches that introduced for other libraries in 4.74 PP/03.
325 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
327 PP/04 New "dns_use_edns0" global option.
329 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
332 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
333 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
335 TK/01 Updated PolarSSL code to 0.14.2.
336 Bugzilla 1097. Patch from Andreas Metzler.
338 PP/07 Catch divide-by-zero in ${eval:...}.
341 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
344 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
345 format-string attack -- SECURITY: remote arbitrary code execution.
347 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
348 time unintentionally subject to list matching rules, letting the header
349 cause arbitrary Exim lookups (of items which can occur in lists, *not*
350 arbitrary string expansion). This allowed for information disclosure.
352 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
353 INT_MIN/-1 -- value coerced to INT_MAX.
359 NM/01 Workround for PCRE version dependency in version reporting
362 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
363 This fixes portability to compilers other than gcc, notably
364 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
366 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
367 makefiles for portability to HP-UX and POSIX correctness.
369 PP/01 Permit LOOKUP_foo enabling on the make command-line.
370 Also via indented variable definition in the Makefile.
371 (Debugging by Oliver Heesakkers).
373 PP/02 Restore caching of spamd results with expanded spamd_address.
374 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
376 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
377 Improves build reliability. Fix from: Frank Elsner
379 NM/02 Fix wide character breakage in the rfc2047 coding
380 Fixes bug 1064. Patch from Andrey N. Oktyabrski
382 NM/03 Allow underscore in dnslist lookups
383 Fixes bug 1026. Patch from Graeme Fowler
385 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
386 Code patches from Adam Ciarcinski of NetBSD.
388 NM/04 Fixed exiqgrep to cope with mailq missing size issue
391 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
392 is logged, to avoid truncation. Patch from John Horne.
394 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
395 Patch from Jakob Hirsch.
397 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
398 SQL string expansion failure details.
399 Patch from Andrey Oktyabrski.
401 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
402 Patch from Simon Arlott.
404 PP/09 New lookups functionality failed to compile on old gcc which rejects
405 extern declarations in function scope.
406 Patch from Oliver Fleischmann
408 PP/10 Use sig_atomic_t for flags set from signal handlers.
409 Check getgroups() return and improve debugging.
410 Fixed developed for diagnosis in bug 927 (which turned out to be
413 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
414 Patch from Mark Zealey.
416 PP/12 Bugzilla 1056: Improved spamd server selection.
417 Patch from Mark Zealey.
419 PP/13 Bugzilla 1086: Deal with maildir quota file races.
420 Based on patch from Heiko Schlittermann.
422 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
423 Patch from Uwe Doering, sign-off by Michael Haardt.
425 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
426 variable declaration deep within a block. Bug and patch from
429 PP/15 lookups-Makefile IRIX compatibilty coercion.
431 PP/16 Make DISABLE_DKIM build knob functional.
433 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
434 Patch by Simon Arlott
436 TF/03 Fix valgrind.h portability to C89 compilers that do not support
437 variable argument macros. Our copy now differs from upstream.
443 TF/01 Failure to get a lock on a hints database can have serious
444 consequences so log it to the panic log.
446 TF/02 Log LMTP confirmation messages in the same way as SMTP,
447 controlled using the smtp_confirmation log selector.
449 TF/03 Include the error message when we fail to unlink a spool file.
451 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
452 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
453 for maintaining out-of-tree patches for some time.
455 PP/01 Bugzilla 139: Documentation and portability issues.
456 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
457 Handle per-OS dynamic-module compilation flags.
459 PP/02 Let /dev/null have normal permissions.
460 The 4.73 fixes were a little too stringent and complained about the
461 permissions on /dev/null. Exempt it from some checks.
462 Reported by Andreas M. Kirchwitz.
464 PP/03 Report version information for many libraries, including
465 Exim version information for dynamically loaded libraries. Created
466 version.h, now support a version extension string for distributors
467 who patch heavily. Dynamic module ABI change.
469 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
470 privilege escalation vulnerability whereby the Exim run-time user
471 can cause root to append content of the attacker's choosing to
474 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
477 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
478 If dropping privileges for untrusted macros, we disabled normal logging
479 on the basis that it would fail; for the Exim run-time user, this is not
480 the case, and it resulted in successful deliveries going unlogged.
481 Fixed. Reported by Andreas Metzler.
487 PP/01 Date: & Message-Id: revert to normally being appended to a message,
488 only prepend for the Resent-* case. Fixes regression introduced in
489 Exim 4.70 by NM/22 for Bugzilla 607.
491 PP/02 Include check_rfc2047_length in configure.default because we're seeing
492 increasing numbers of administrators be bitten by this.
494 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
496 PP/03 Bugzilla 994: added openssl_options main configuration option.
498 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
500 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
502 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
504 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
505 without a peer certificate, leading to a segfault because of an
506 assumption that peers always have certificates. Be a little more
507 paranoid. Problem reported by Martin Tscholak.
509 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
510 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
511 NB: ClamAV planning to remove STREAM in "middle of 2010".
512 CL also introduces -bmalware, various -d+acl logging additions and
513 more caution in buffer sizes.
515 PP/09 Implemented reverse_ip expansion operator.
517 PP/10 Bugzilla 937: provide a "debug" ACL control.
519 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
521 PP/12 Bugzilla 973: Implement --version.
523 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
525 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
527 PP/15 Bugzilla 816: support multiple condition rules on Routers.
529 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
530 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
531 ignore trailing whitespace.
533 JJ/02 prevent non-panic DKIM error from being sent to paniclog
535 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
538 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
539 Notification from Dr Andrew Aitchison.
541 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
542 ExtendedDetectionInfo response format.
543 Notification from John Horne.
545 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
548 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
549 XSL and documented dependency on system catalogs, with examples of how
552 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
555 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
556 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
557 configuration file which is writeable by the Exim user or group.
559 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
560 of configuration files to cover files specified with the -C option if
561 they are going to be used with root privileges, not just the default
564 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
565 option (effectively making it always true).
567 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
568 files to be used while preserving root privileges.
570 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
571 that rogue child processes cannot use them.
573 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
574 run-time user, instead of root.
576 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
577 Exim run-time user without dropping privileges.
579 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
580 result string, instead of calling string_vformat() twice with the same
583 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
584 for other users. Others should always drop root privileges if they use
585 -C on the command line, even for a whitelisted configure file.
587 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
589 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
595 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
596 $data_path, and $header_path variables; fixed documentation bugs and
599 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
600 exipick to access non-standard spools, including the "frozen" queue
603 NM/01 Bugzilla 965: Support mysql stored procedures.
604 Patch from Alain Williams
606 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
608 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
609 Patch from Andreas Metzler
611 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
612 Patch from Kirill Miazine
614 NM/05 Bugzilla 671: Added umask to procmail example.
616 JJ/03 installed exipick 20100323.0, fixing doc bug
618 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
619 directory. Notification and patch from Dan Rosenberg.
621 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
623 TK/02 Improve log output when DKIM signing operation fails.
625 MH/01 Treat the transport option dkim_domain as a colon separated
626 list, not as a single string, and sign the message with each element,
627 omitting multiple occurences of the same signer.
629 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
630 Bugzilla 985, 986. Patch by Simon Arlott
632 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
633 Patch by Simon Arlott
635 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
636 MBX locking. Notification from Dan Rosenberg.
642 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
644 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
646 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
648 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
650 NM/04 Bugzilla 915: Flag broken perl installation during build.
656 TK/01 Added patch by Johannes Berg that expands the main option
657 "spamd_address" if it starts with a dollar sign.
659 TK/02 Write list of recipients to X-Envelope-Sender header when building
660 the mbox-format spool file for content scanning (suggested by Jakob
663 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
664 (http://www.dcc-servers.net/) support via dccifd. Activated by
665 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
667 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
668 by Mark Daniel Reidel <mr@df.eu>.
670 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
671 When building exim an external PCRE library is now needed -
672 PCRE is a system library on the majority of modern systems.
673 See entry on PCRE_LIBS in EDITME file.
675 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
676 conversation. Added nologin parameter to request.
677 Patch contributed by Kirill Miazine.
679 TF/01 Do not log submission mode rewrites if they do not change the address.
681 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
683 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
684 log files in place. Contributed by Roberto Lima.
686 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
688 TF/03 Bugzilla 615: When checking the local_parts router precondition
689 after a local_part_suffix or local_part_prefix option, Exim now
690 does not use the address's named list lookup cache, since this
691 contains cached lookups for the whole local part.
693 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
694 Robert Millan. Documentation is in experimental-spec.txt.
696 TF/04 Bugzilla 668: Fix parallel build (make -j).
698 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
700 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
701 Patch provided by Jan Srzednicki.
703 TF/05 Leading white space used to be stripped from $spam_report which
704 wrecked the formatting. Now it is preserved.
706 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
707 that they are available at delivery time.
709 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
711 TF/08 TLS error reporting now respects the incoming_interface and
712 incoming_port log selectors.
714 TF/09 Produce a more useful error message if an SMTP transport's hosts
715 setting expands to an empty string.
717 NM/06 Bugzilla 744: EXPN did not work under TLS.
718 Patch provided by Phil Pennock.
720 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
721 Patch provided by Richard Godbee.
723 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
724 acl_smtp_notquit, added index entry.
726 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
727 Patch provided by Eugene Bujak.
729 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
730 accept(). Patch provided by Maxim Dounin.
732 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
733 Patch provided by Phil Pennock.
735 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
737 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
738 Patch provided by Brad "anomie" Jorsch.
740 NM/14 Bugzilla 622: Added timeout setting to transport filter.
741 Patch provided by Dean Brooks.
743 TK/05 Add native DKIM support (does not depend on external libraries).
745 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
746 Patch provided by Graeme Fowler.
748 NM/16 Bugzilla 851: Documentation example syntax fix.
750 NM/17 Changed NOTICE file to remove references to embedded PCRE.
752 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
755 NM/19 Bugzilla 745: TLS version reporting.
756 Patch provided by Phil Pennock.
758 NM/20 Bugzilla 167: bool: condition support.
759 Patch provided by Phil Pennock.
761 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
762 clients. Patch provided by Phil Pennock.
764 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
765 Patch provided by Brad "anomie" Jorsch.
767 NM/23 Bugzilla 687: Fix misparses in eximstats.
768 Patch provided by Heiko Schlittermann.
770 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
771 Patch provided by Heiko Schlittermann.
773 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
774 plus update to original patch.
776 NM/26 Bugzilla 799: Documentation correction for ratelimit.
778 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
779 Patch provided by David Brownlee.
781 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
783 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
785 NM/30 Bugzilla 888: TLS documentation bugfixes.
787 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
789 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
790 Unlike the original bugzilla I have changed all shell scripts in src tree.
792 NM/33 Bugzilla 898: Transport filter timeout fix.
793 Patch by Todd Rinaldo.
795 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
796 Patch by Serge Demonchaux.
798 NM/35 Bugzilla 39: Base64 decode bug fixes.
799 Patch by Jakob Hirsch.
801 NM/36 Bugzilla 909: Correct connect() call in dcc code.
803 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
805 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
807 NM/39 Bugzilla 911: Fixed MakeLinks build script.
813 TK/01 Add preliminary DKIM support. Currently requires a forked version of
814 ALT-N's libdkim that I have put here:
815 http://duncanthrax.net/exim-experimental/
817 Note to Michael Haardt: I had to rename some vars in sieve.c. They
818 were called 'true' and it seems that C99 defines that as a reserved
819 keyword to be used with 'bool' variable types. That means you could
820 not include C99-style headers which use bools without triggering
821 build errors in sieve.c.
823 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
824 as mailq or other aliases. Changed the --help handling significantly
825 to do whats expected. exim_usage() emits usage/help information.
827 SC/01 Added the -bylocaldomain option to eximstats.
829 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
831 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
833 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
839 PH/01 Another patch from the Sieve maintainer.
841 PH/02 When an IPv6 address is converted to a string for single-key lookup
842 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
843 dots are used instead of colons so that keys in lsearch files need not
844 contain colons. This was done some time before quoting was made available
845 in lsearch files. However, iplsearch files do require colons in IPv6 keys
846 (notated using the quote facility) so as to distinguish them from IPv4
847 keys. This meant that lookups for IP addresses in host lists did not work
848 for iplsearch lookups.
850 This has been fixed by arranging for IPv6 addresses to be expressed with
851 colons if the lookup type is iplsearch. This is not incompatible, because
852 previously such lookups could never work.
854 The situation is now rather anomolous, since one *can* have colons in
855 ordinary lsearch keys. However, making the change in all cases is
856 incompatible and would probably break a number of configurations.
858 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
861 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
862 conversion specification without a maximum field width, thereby enabling
863 a rogue spamd server to cause a buffer overflow. While nobody in their
864 right mind would setup Exim to query an untrusted spamd server, an
865 attacker that gains access to a server running spamd could potentially
866 exploit this vulnerability to run arbitrary code as the Exim user.
868 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
869 $primary_hostname instead of what libspf2 thinks the hosts name is.
871 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
872 a directory entry by the name of the lookup key. Previously, if a
873 symlink pointed to a non-existing file or a file in a directory that
874 Exim lacked permissions to read, a lookup for a key matching that
875 symlink would fail. Now it is enough that a matching directory entry
876 exists, symlink or not. (Bugzilla 503.)
878 PH/03 The body_linecount and body_zerocount variables are now exported in the
881 PH/04 Added the $dnslist_matched variable.
883 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
884 This means they are set thereafter only if the connection becomes
887 PH/06 Added the client_condition to authenticators so that some can be skipped
888 by clients under certain conditions.
890 PH/07 The error message for a badly-placed control=no_multiline_responses left
891 "_responses" off the end of the name.
893 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
895 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
896 (without spaces) instead of just copying the configuration text.
898 PH/10 Added the /noupdate option to the ratelimit ACL condition.
900 PH/11 Added $max_received_linelength.
902 PH/12 Added +ignore_defer and +include_defer to host lists.
904 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
905 way in which PCRE > 7.0 is built.
907 PH/14 Implemented queue_only_load_latch.
909 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
910 MAIL command. The effect was to mangle the value on 64-bit systems.
912 PH/16 Another patch from the Sieve maintainer.
914 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
916 PH/18 If a system quota error occurred while trying to create the file for
917 a maildir delivery, the message "Mailbox is full" was not appended to the
918 bounce if the delivery eventually timed out. Change 4.67/27 below applied
919 only to a quota excession during the actual writing of the file.
921 PH/19 It seems that peer DN values may contain newlines (and other non-printing
922 characters?) which causes problems in log lines. The DN values are now
923 passed through string_printing() before being added to log lines.
925 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
926 and InterBase are left for another time.)
928 PH/21 Added message_body_newlines option.
930 PH/22 Guard against possible overflow in moan_check_errorcopy().
932 PH/23 POSIX allows open() to be a macro; guard against that.
934 PH/24 If the recipient of an error message contained an @ in the local part
935 (suitably quoted, of course), incorrect values were put in $domain and
936 $local_part during the evaluation of errors_copy.
942 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
943 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
946 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
947 issue a MAIL command.
949 PH/02 In an ACL statement such as
951 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
953 if a client was not listed at all, or was listed with a value other than
954 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
955 the condition was not true (as it should be), so access was not denied.
956 The bug was that the ! inversion was incorrectly passed on to the second
957 item. This has been fixed.
959 PH/03 Added additional dnslists conditions == and =& which are different from
960 = and & when the dns lookup returns more than one IP address.
962 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
963 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
965 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
966 FSYNC, which compiles an option called disable_fsync that allows for
967 bypassing fsync(). The documentation is heavily laced with warnings.
969 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
971 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
972 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
973 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
974 including adding "make clean"; (3) Added -fPIC when compiling the test
975 dynamically loaded module, to get rid of a warning.
977 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
978 message fails, move_frozen_messages = true and ignore_bounce_errors_after
979 = 0s. The bug is otherwise harmless.
981 PH/07 There was a bug in the dovecot authenticator such that the value of
982 $auth1 could be overwritten, and so not correctly preserved, after a
983 successful authentication. This usually meant that the value preserved by
984 the server_setid option was incorrect.
986 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
988 PH/09 Installed PCRE release 7.0.
990 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
991 run for batched SMTP input. It is now run at the start of every message
992 in the batch. While fixing this I discovered that the process information
993 (output by running exiwhat) was not always getting set for -bs and -bS
994 input. This is fixed, and it now also says "batched" for BSMTP.
996 PH/11 Added control=no_pipelining.
998 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
999 patch, slightly modified), and move the expansion of helo_data till after
1000 the connection is made in the smtp transport (so it can use these
1003 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1005 PH/14 Added log_selector = +pid.
1007 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1009 PH/16 Add ${if forany and ${if forall.
1011 PH/17 Added dsn_from option to vary the From: line in DSNs.
1013 PH/18 Flush SMTP output before performing a callout, unless control =
1014 no_callout_flush is set.
1016 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1017 was true (the default) a successful delivery failed to delete the retry
1018 item, thus causing premature timeout of the address. The bug is now
1021 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1023 PH/21 Long custom messages for fakedefer and fakereject are now split up
1024 into multiline reponses in the same way that messages for "deny" and
1025 other ACL rejections are.
1027 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1028 with slight modification.
1030 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1031 draft, changing the syntax and factoring some duplicate code".
1033 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1034 for deliveries of the second and subsequent messages over the same SMTP
1037 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1038 ${reduce, with only minor "tidies".
1040 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1042 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1043 expansion side effects.
1045 PH/27 When a message times out after an over-quota error from an Exim-imposed
1046 quota, the bounce message says "mailbox is full". This message was not
1047 being given when it was a system quota that was exceeded. It now should
1050 MH/03 Made $recipients available in local_scan(). local_scan() already has
1051 better access to the recipient list through recipients_list[], but
1052 $recipients can be useful in postmaster-provided expansion strings.
1054 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1055 in the case of a MAIL command with additional options following the
1056 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1057 were accidentally chopped off.
1059 PH/29 SMTP synchronization checks are implemented when a command is read -
1060 there is a check that no more input is waiting when there shouldn't be
1061 any. However, for some commands, a delay in an ACL can mean that it is
1062 some time before the response is written. In this time, more input might
1063 arrive, invalidly. So now there are extra checks after an ACL has run for
1064 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1065 pipelining has not been advertised.
1067 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1069 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1070 returned in the SMTP response when smtp_return_error_details was false.
1071 This has been fixed.
1073 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1074 instead of the C I/O that was originally supplied, because problems were
1075 reported on Solaris.
1077 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1078 Exim which did not show up earlier: it was assuming that a call to
1079 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1080 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1081 was a macro that became an assignment, so it seemed to work. This has
1082 changed to a proper function call with a void return, hence the compile
1083 error. Exim's code has been fixed.
1085 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1088 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1090 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1092 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1093 because it turns out to be too big or there is a timeout) there is no
1094 "Completed" line in the log. When some messages of this type were
1095 selected by exigrep, they were listed as "not completed". Others were
1096 picked up by some special patterns. I have improved the selection
1097 criteria to be more general.
1099 PH/38 The host_find_failed option in the manualroute router can now be set
1100 to "ignore", to completely ignore a host whose IP address cannot be
1101 found. If all hosts are ignored, the behaviour is controlled by the new
1102 host_all_ignored option.
1104 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1105 homing or because of multiple MX records with /mx) generated more than
1106 one IP address, and the following item turned out to be the local host,
1107 all the secondary addresses of the first item were incorrectly removed
1108 from the list, along with the local host and any following hosts (which
1109 is what is supposed to happen).
1111 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1112 whoever called Exim into the -H file. In the case of the daemon it was
1113 behaving confusingly. When first started, it used values for whoever
1114 started the daemon, but after a SIGHUP it used the Exim user (because it
1115 calls itself on a restart). I have changed the code so that it now always
1118 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1119 message are rejected with the same error (e.g. no authentication or bad
1120 sender address), and a DATA command is nevertheless sent (as can happen
1121 with PIPELINING or a stupid MUA), the error message that was given to the
1122 RCPT commands is included in the rejection of the DATA command. This is
1123 intended to be helpful for MUAs that show only the final error to their
1126 PH/42 Another patch from the Sieve maintainer.
1128 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1129 Eximstats - Fixed some broken HTML links and added missing column headers
1131 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1132 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1134 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1136 PH/43 Yet another patch from the Sieve maintainer.
1138 PH/44 I found a way to check for a TCP/IP connection going away before sending
1139 the response to the final '.' that terminates a message, but only in the
1140 case where the client has not sent further data following the '.'
1141 (unfortunately, this is allowed). However, in many cases there won't be
1142 any further data because there won't be any more messages to send. A call
1143 to select() can be used: if it shows that the input is "ready", there is
1144 either input waiting, or the socket has been closed. An attempt to read
1145 the next input character can distinguish the two cases. Previously, Exim
1146 would have sent an OK response which the client would never have see.
1147 This could lead to message repetition. This fix should cure that, at
1148 least in a lot of common cases.
1150 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1151 advertised in response to EHLO.
1157 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1158 fixed by 4.65/MH/01 (is this a record?) are fixed:
1160 (i) An empty string was always treated as zero by the numeric comparison
1161 operators. This behaviour has been restored.
1163 (ii) It is documented that the numeric comparison operators always treat
1164 their arguments as decimal numbers. This was broken in that numbers
1165 starting with 0 were being interpreted as octal.
1167 While fixing these problems I realized that there was another issue that
1168 hadn't been noticed. Values of message_size_limit (both the global option
1169 and the transport option) were treated as octal if they started with 0.
1170 The documentation was vague. These values are now always treated as
1171 decimal, and I will make that clear in the documentation.
1177 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1178 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1181 MH/01 Don't check that the operands of numeric comparison operators are
1182 integers when their expansion is in "skipping" mode (fixes bug
1183 introduced by 4.64-PH/07).
1185 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1186 child addresses, Exim now panics and dies. Previously, because the count
1187 is held in a short int, deliveries were likely to be lost. As such a
1188 large number of recipients for a single message is ridiculous
1189 (performance will be very, very poor), I have chosen to impose a limit
1190 rather than extend the field.
1196 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1197 leftover -K file (the existence of which was triggered by #402).
1198 While we were at it, introduced process PID as part of the -K
1199 filename. This should rule out race conditions when creating
1202 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1203 processing considerably. Previous code took too long for large mails,
1204 triggering a timeout which in turn triggers #401.
1206 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1207 in the DK code in transports.c. sendfile() is not really portable,
1208 hence the _LINUX specificness.
1210 TF/01 In the add_headers option to the mail command in an Exim filter,
1211 there was a bug that Exim would claim a syntax error in any
1212 header after the first one which had an odd number of characters
1215 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1216 callout verification, Exim cached a "reject" for the entire domain. This
1217 is correct for most verifications, but it is not correct for a recipient
1218 verification with use_sender or use_postmaster set, because in that case
1219 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1220 case of MAIL FROM:<> rejection from other early rejections (e.g.
1221 rejection of HELO). When verifying a recipient using a non-null MAIL
1222 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1223 Whatever the result of the callout, the value of the domain cache is
1224 left unchanged (for any other kind of callout, getting as far as trying
1225 RCPT means that the domain itself is ok).
1227 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1230 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1231 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1232 session, the daemon ignores ECONNECT errors and logs others; it now
1233 ignores EPIPE as well.
1235 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1236 (quoted-printable decoding).
1238 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1239 later the small subsequent patch to fix an introduced bug.
1241 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1243 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1245 PH/08 An error is now given if message_size_limit is specified negative.
1247 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1248 to be given (somewhat) arbitrary names.
1250 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1253 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1254 miscellaneous code fixes
1256 PH/10 Added the log_reject_target ACL modifier to specify where to log
1259 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1260 hostname. This is wrong, because it relates to the incoming message (and
1261 probably the interface on which it is arriving) and not to the outgoing
1262 callout (which could be using a different interface). This has been
1263 changed to use the value of the helo_data option from the smtp transport
1264 instead - this is what is used when a message is actually being sent. If
1265 there is no remote transport (possible with a router that sets up host
1266 addresses), $smtp_active_hostname is used.
1268 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1269 tweaks were necessary in order to get it to work (see also 21 below):
1270 (a) The code assumed that strncpy() returns a negative number on buffer
1271 overflow, which isn't the case. Replaced with Exim's string_format()
1273 (b) There were several signed/unsigned issues. I just did the minimum
1274 hacking in of casts. There is scope for a larger refactoring.
1275 (c) The code used strcasecmp() which is not a standard C function.
1276 Replaced with Exim's strcmpic() function.
1277 (d) The code set only $1; it now sets $auth1 as well.
1278 (e) A simple test gave the error "authentication client didn't specify
1279 service in request". It would seem that Dovecot has changed its
1280 interface. Fortunately there's a specification; I followed it and
1281 changed what the client sends and it appears to be working now.
1283 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1286 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1287 address A is aliased to B and C, where B exists and C does not. Without
1288 -v the output is "A verified" because verification stops after a
1289 successful redirection if more than one address is generated. However,
1290 with -v the child addresses are also verified. Exim was outputting "A
1291 failed to verify" and then showing the successful verification for C,
1292 with its parentage. It now outputs "B failed to verify", showing B's
1293 parentage before showing the successful verification of C.
1295 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1296 look up a TXT record in a specific list after matching in a combined
1299 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1300 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1301 they consult the DNS. I had assumed they would set it the way they
1302 wanted; and indeed my experiments on Linux seem to show that in some
1303 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1304 To be on the safe side, however, I have now made the interface to
1305 host_find_byname() similar to host_find_bydns(), with an argument
1306 containing the DNS resolver options. The host_find_byname() function now
1307 sets these options at its start, just as host_find_bydns() does. The smtp
1308 transport options dns_qualify_single and dns_search_parents are passed to
1309 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1310 of host_find_byname() use the default settings of RES_DEFNAMES
1311 (qualify_single) but not RES_DNSRCH (search_parents).
1313 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1314 spool_read_header() do less string testing, by means of a preliminary
1315 switch on the second character of optional "-foo" lines. (This is
1316 overdue, caused by the large number of possibilities that now exist.
1317 Originally there were few.) While I was there, I also converted the
1318 str(n)cmp tests so they don't re-test the leading "-" and the first
1319 character, in the hope this might squeeze out yet more improvement.
1321 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1322 flag allowing group syntax was set by the header_syntax check but not
1323 turned off, possible causing trouble later; (2) The flag was not being
1324 set at all for the header_verify test, causing "group"-style headers to
1325 be rejected. I have now set it in this case, and also caused header_
1326 verify to ignore an empty address taken from a group. While doing this, I
1327 came across some other cases where the code for allowing group syntax
1328 while scanning a header line wasn't quite right (mostly, not resetting
1329 the flag correctly in the right place). These bugs could have caused
1330 trouble for malformed header lines. I hope it is now all correct.
1332 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1333 with the "reply" argument non-NULL. The code, however (which originally
1334 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1335 but it didn't always do it. This confused somebody who was copying the
1336 code for some other use. I have removed all the tests.
1338 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1339 feature that was used to support insecure browsers during the U.S. crypto
1340 embargo. It requires special client support, and Exim is probably the
1341 only MTA that supported it -- and would never use it because real RSA is
1342 always available. This code has been removed, because it had the bad
1343 effect of slowing Exim down by computing (never used) parameters for the
1344 RSA_EXPORT functionality.
1346 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1347 authenticator to fail if there's a tab character in the incoming data
1348 (there should never be unless someone is messing about, as it's supposed
1349 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1350 if the connection is using TLS or if the remote IP is the same as the
1351 local IP, and the "valid-client-cert option" if a client certificate has
1354 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1355 authenticators. This can be used for authorization after authentication
1356 succeeds. (In the case of plaintext, it servers for both authentication
1359 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1360 if any retry times were supplied.
1362 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1363 connection, where there is no client IP address to check. In this
1364 situation, the verify now always succeeds.
1366 PH/25 Applied John Jetmore's -Mset patch.
1368 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1370 PH/27 In a string expansion for a processed (not raw) header when multiple
1371 headers of the same name were present, leading whitespace was being
1372 removed from all of them, but trailing whitespace was being removed only
1373 from the last one. Now trailing whitespace is removed from each header
1374 before concatenation. Completely empty headers in a concatenation (as
1375 before) are ignored.
1377 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1378 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1380 PH/29 [Removed. This was a change that I later backed out, and forgot to
1381 correct the ChangeLog entry (that I had efficiently created) before
1382 committing the later change.]
1384 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1385 address errors (4xx response to RCPT) over the same connection as other
1386 messages routed to the same hosts. Such deliveries are always "forced",
1387 so retry times are not inspected. This resulted in far too many retries
1388 for the affected addresses. The effect occurred only when there were more
1389 hosts than the hosts_max_try setting in the smtp transport when it had
1390 the 4xx errors. Those hosts that it had tried were not added to the list
1391 of hosts for which the message was waiting, so if all were tried, there
1392 was no problem. Two fixes have been applied:
1394 (i) If there are any address or message errors in an SMTP delivery, none
1395 of the hosts (tried or untried) are now added to the list of hosts
1396 for which the message is waiting, so the message should not be a
1397 candidate for sending over the same connection that was used for a
1398 successful delivery of some other message. This seems entirely
1399 reasonable: after all the message is NOT "waiting for some host".
1400 This is so "obvious" that I'm not sure why it wasn't done
1401 previously. Hope I haven't missed anything, but it can't do any
1402 harm, as the worst effect is to miss an optimization.
1404 (ii) If, despite (i), such a delivery is accidentally attempted, the
1405 routing retry time is respected, so at least it doesn't keep
1406 hammering the server.
1408 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1409 in ${readsocket because some servers need this prod.
1411 PH/32 Added some extra debug output when updating a wait-xxx database.
1413 PH/33 The hint "could be header name not terminated by colon", which has been
1414 given for certain expansion errors for a long time, was not being given
1415 for the ${if def:h_colon_omitted{... case.
1417 PH/34 The spec says: "With one important exception, whenever a domain list is
1418 being scanned, $domain contains the subject domain." There was at least
1419 one case where this was not true.
1421 PH/35 The error "getsockname() failed: connection reset by peer" was being
1422 written to the panic log as well as the main log, but it isn't really
1423 panic-worthy as it just means the connection died rather early on. I have
1424 removed the panic log writing for the ECONNRESET error when getsockname()
1427 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1428 runs only) independently of the message's sender address. This meant
1429 that, if the 4xx error was in fact related to the sender, a different
1430 message to the same recipient with a different sender could confuse
1431 things. In particualar, this can happen when sending to a greylisting
1432 server, but other circumstances could also provoke similar problems.
1433 I have changed the default so that the retry time for these errors is now
1434 based a combination of the sender and recipient addresses. This change
1435 can be overridden by setting address_retry_include_sender=false in the
1438 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1439 remote server are returned as part of bounce messages. This was not
1440 happening for LMTP over a pipe (the lmtp transport), but now it is the
1441 same for both kinds of LMTP.
1443 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1444 in header lines that were in fact CNAMEs. This is no longer the case.
1446 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1447 and queue runs started by the daemon processed all messages. This has
1448 been fixed so that -R and -S can now usefully be given with -q<time>.
1450 PH/40 Import PCRE release 6.7 (fixes some bugs).
1452 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1454 PH/42 Give an error if -q is specified more than once.
1456 PH/43 Renamed the variables $interface_address and $interface_port as
1457 $received_ip_address and $received_port, to make it clear that these
1458 values apply to message reception, and not to the outgoing interface when
1459 a message is delivered. (The old names remain recognized, of course.)
1461 PH/44 There was no timeout on the connect() call when using a Unix domain
1462 socket in the ${readsocket expansion. There now is.
1464 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1465 be meaningful with "accept".
1467 SC/01 Eximstats V1.43
1468 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1470 SC/02 Eximstats V1.44
1471 Use a glob alias rather than an array ref in the generated
1472 parser. This improves both readability and performance.
1474 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1475 Collect SpamAssassin and rejection statistics.
1476 Don't display local sender or destination tables unless
1477 there is data to show.
1478 Added average volumes into the top table text output.
1480 SC/04 Eximstats V1.46
1481 Collect data on the number of addresses (recipients)
1482 as well as the number of messages.
1484 SC/05 Eximstats V1.47
1485 Added 'Message too big' to the list of mail rejection
1486 reasons (thanks to Marco Gaiarin).
1488 SC/06 Eximstats V1.48
1489 Mainlog lines which have GMT offsets and are too short to
1490 have a flag are now skipped.
1492 SC/07 Eximstats V1.49 (Alain Williams)
1493 Added the -emptyok flag.
1495 SC/08 Eximstats V1.50
1496 Fixes for obtaining the IP address from reject messages.
1498 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1499 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1500 whitesspace changes from 4.64-PH/27
1502 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1505 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1506 are found, allow negative numbers in numeric criteria)
1508 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1510 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1511 to match changes made in 4.64-PH/43
1513 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1515 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1516 "domain" is actually an IP address, and force a failure. This locks out
1517 those revolvers/nameservers that support "A-for-A" lookups, in
1518 contravention of the specifications.
1520 PH/48 When a host name was looked up from an IP address, and the subsequent
1521 forward lookup of the name timed out, the host name was left in
1522 $sender_host_name, contrary to the specification.
1524 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1525 restricted to single-key lookups, Exim was not diagnosing an error if
1526 * or *@ was used with a query-style lookup.
1528 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1530 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1531 long ago, but noone interested enough thought of it. Let's just say that
1532 the "1.1" means that there are some new functions that weren't there at
1533 some point in the past.
1535 PH/51 Error processing for expansion failure of helo_data from an smtp
1536 transport during callout processing was broken.
1538 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1539 tested/used via the -bh/-bhc/-bs options.
1541 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1542 bug, fixed in subsequent PCRE releases).
1544 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1545 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1547 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1553 SC/01 Use a glob alias rather than an array ref in eximstats generated
1554 parser. This improves both readability and performance.
1556 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1557 Don't display local sender or destination tables in eximstats unless
1558 there is data to show.
1559 Added average volumes into the eximstats top table text output.
1561 SC/03 Collect data on the number of addresses (recipients) as well
1562 as the number of messages in eximstats.
1564 TF/01 Correct an error in the documentation for the redirect router. Exim
1565 does (usually) call initgroups() when daemonizing.
1567 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1568 with consistent privilege compared to when running as a daemon.
1570 TF/03 Note in the spec that $authenticated_id is not set for local
1571 submissions from trusted users.
1573 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1574 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1576 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1577 by adding some example configuration directives to the default
1578 configuration file. A little bit of work is required to uncomment the
1579 directives and define how usernames and passwords are checked, but
1580 there is now a framework to start from.
1582 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1583 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1584 without this. I don't know how relevant this is to other LDAP libraries.
1586 PH/02 Add the verb name to the "unknown ACL verb" error.
1588 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1590 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1592 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1593 directory not expanded when it should be if an expanded home directory
1594 was set for the address (which is overridden by the transport).
1596 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1599 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1600 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1601 because it is too late at that time, and has no effect.
1603 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1604 security issue with \' (bugzilla #107). I could not use the
1605 PQescapeStringConn() function, because it needs a PGconn value as one of
1608 PH/08 When testing addresses using -bt, indicate those final addresses that
1609 are duplicates that would not cause an additional delivery. At least one
1610 person was confused, thinking that -bt output corresponded to deliveries.
1611 (Suppressing duplicates isn't a good idea as you lose the information
1612 about possibly different redirections that led to the duplicates.)
1614 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1615 systems where poll() doesn't work, in particular OS X.
1617 PH/10 Added more information to debugging output for retry time not reached.
1619 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1620 operations in malware.c.
1622 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1625 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1626 syslog_duplication set false, log lines that would normally be written
1627 both the the main log and to the reject log were not written to syslog at
1630 PH/14 In the default configuration, change the use of "message" in ACL warn
1631 statements to "add_header".
1633 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1634 not followed by a command (e.g. "seen endif").
1636 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1637 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1640 PH/17 Added extra conditions to the default value of delay_warning_condition
1644 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1645 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1646 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1649 The Auto-Submitted: and various List- headers are standardised, whereas I
1650 don't think Precedence: ever was.
1652 PH/18 Refactored debugging code in route_finduser() to show more information,
1653 in particular, the error code if getpwnam() issues one.
1655 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1656 This is apparently needed in addition to the PH/07 change above to avoid
1657 any possible encoding problems.
1659 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1660 but not after initializing Perl.
1662 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1663 output them only if debugging. By default they are written stderr,
1664 apparently, which is not desirable.
1666 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1669 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1672 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1674 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1675 authenticated or an ident call has been made. Suppress the default
1676 values for $authenticated_id and $authenticated_sender (but permit -oMai
1677 and -oMas) when testing with -bh.
1679 PH/24 Re-jigged the order of the tests in the default configuration so that the
1680 tests for valid domains and recipients precede the DNS black list and CSA
1681 tests, on the grounds that those ones are more expensive.
1683 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1684 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1685 This bug exists in every version of Exim that I still have, right back to
1688 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1689 However, an attempt to turn on case-sensitivity in a regex key by
1690 including (?-i) didn't work because the subject string was already
1691 lowercased, and the effects were non-intuitive. It turns out that a
1692 one-line patch can be used to allow (?-i) to work as expected.
1698 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1699 other effects) broke the use of negated acl sub-conditions.
1701 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1704 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1705 "Deny" causes Exim to reject the incoming connection with a 554 error.
1706 Unfortunately, if there is a major crisis, such as a disk failure,
1707 tcp-wrappers gives "deny", whereas what one would like would be some
1708 kind of temporary error. A kludge has been added to help with this.
1709 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1710 554 error is used if errno is still zero or contains ENOENT (which occurs
1711 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1714 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1716 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1717 errors. Otherwise a message that provokes a temporary error (when other
1718 messages do not) can cause a whole host to time out.
1720 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1721 addresses were routed directly to files or pipes from a redirect router.
1722 File deliveries just didn't batch; pipe deliveries might have suffered
1725 PH/06 A failure to get a lock for a hints database would erroneously always say
1726 "Failed to get write lock", even when it was really a read lock.
1728 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1729 of 0600. This has been changed to use the value of the lockfile_mode
1730 option (which defaults to 0600).
1732 PH/08 Applied small patch from the Sieve maintainer.
1734 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1735 folder from quota calculations, a direct delivery into this folder messed
1736 up the contents of the maildirsize file. This was because the regex was
1737 used only to exclude .Trash (or whatever) when the size of the mailbox
1738 was calculated. There was no check that a delivery was happening into an
1739 excluded directory. This bug has been fixed by ignoring all quota
1740 processing for deliveries into excluded directories.
1742 PH/10 Added the maildirfolder_create_regex option to appendfile.
1748 PH/01 The code for finding all the local interface addresses on a FreeBSD
1749 system running IPv6 was broken. This may well have applied to all BSD
1750 systems, as well as to others that have similar system calls. The broken
1751 code found IPv4 interfaces correctly, but gave incorrect values for the
1752 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1753 that it would not match correctly against @[] and not recognize the IPv6
1756 PH/02 The ipliteral router was not recognizing addresses of the form user@
1757 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1759 PH/03 Added disable_ipv6.
1761 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1762 decoded form, because it is most often used to construct To: headers
1763 lines in autoreplies, and the decoded form may well be syntactically
1764 invalid. However, $reply_address has leading white space removed, and all
1765 newlines turned into spaces so that the autoreply transport does not
1768 PH/05 If group was specified without a user on a router, and no group or user
1769 was specified on a transport, the group from the router was ignored.
1771 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1772 for visible compile-time settings that can be used to change these
1773 numbers, for those that want even more. Backwards compatibility with old
1774 spool files has been maintained. However, going back to a previous Exim
1775 release will lost any variables that are in spool files.
1777 PH/07 Two small changes when running in the test harness: increase delay when
1778 passing a TCP/IP connection to a new process, in case the original
1779 process has to generate a bounce, and remove special handling of
1780 127.0.0.2 (sic), which is no longer necessary.
1782 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1783 be the same on different OS.
1785 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1788 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1789 whether --show-vars was specified or not
1791 JJ/02 exipick: Added support for new ACL variable spool format introduced
1794 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1795 syntactically invalid From: or Reply-to: line, and a filter used this to
1796 generate an autoreply, and therefore failed to obtain an address for the
1797 autoreply, Exim could try to deliver to a non-existent relative file
1798 name, causing unrelated and misleading errors. What now happens is that
1799 it logs this as a hard delivery error, but does not attempt to create a
1802 PH/11 The exinext utility has a -C option for testing purposes, but although
1803 the given file was scanned by exinext itself; it wasn't being passed on
1804 when Exim was called.
1806 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1807 an end-of-file indication when reading a command response.
1809 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1810 compiled. In many other places in Exim, IPv6 addresses are always
1811 recognized, so I have changed this. It also means that IPv4 domain
1812 literals of the form [IPV4:n.n.n.n] are now always recognized.
1814 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1815 used if the router is not running as root, for example, when verifying at
1816 ACL time, or when using -bh. The debugging output from this situation was
1817 non-existent - all you got was a failure to exec. I have made two
1820 (a) Failures to set uid/gid, the current directory, or a process leader
1821 in a subprocess such as that created by queryprogram now generate
1822 suitable debugging ouput when -d is set.
1824 (b) The queryprogram router detects when it is not running as root,
1825 outputs suitable debugging information if -d is set, and then runs
1826 the subprocess without attempting to change uid/gid.
1828 PH/15 Minor change to Makefile for building test_host (undocumented testing
1831 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1832 additional section of a DNS packet that returns MX or SRV records.
1833 Instead, it always explicitly searches for A/AAAA records. This avoids
1834 major problems that occur when a DNS server includes only records of one
1835 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1836 fixed another bug: if SRV records were looked up and the corresponding
1837 address records were *not* found in the additional section, the port
1838 values from the SRV records were lost.
1840 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1841 using the correct key (the original address) when searching the retry
1842 rules in order to find which one to use for generating the retry hint.
1844 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1845 adding the default one. Similarly, if it contains a Reply-To: header, the
1846 errors_reply_to option, if set, is not used.
1848 PH/19 When calculating a retry time, Exim used to measure the "time since
1849 failure" by looking at the "first failed" field in the retry record. Now
1850 it does not use this if it is later than than the arrival time of the
1851 message. Instead it uses the arrival time. This makes for better
1852 behaviour in cases where some deliveries succeed, thus re-setting the
1853 "first failed" field. An example is a quota failure for a huge message
1854 when small messages continue to be delivered. Without this change, the
1855 "time since failure" will always be short, possible causing more frequent
1856 delivery attempts for the huge message than are intended.
1857 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1859 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1860 $1, $2, $3) because the numerical variables can be reset during some
1861 expansion items (e.g. "match"), thereby losing the authentication data.
1863 PH/21 Make -bV show the size of off_t variables so that the test suite can
1864 decide whether to run tests for quotas > 2G.
1866 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1867 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1868 filecount value is greater than 2G or if a quota value is greater than 2G
1869 on a system where the size of off_t is not greater than 4, a panic error
1872 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1873 never match. The debug and -bh output now contains an explicit error
1874 message indicating a malformed IPv4 address or mask.
1876 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1877 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1878 PH/23 above applies.
1880 PH/25 Do not write to syslog when running in the test harness. The only
1881 occasion when this arises is a failure to open the main or panic logs
1882 (for which there is an explicit test).
1884 PH/26 Added the /no_tell option to "control=freeze".
1886 PH/27 If a host name lookup failed very early in a connection, for example, if
1887 the IP address matched host_lookup and the reverse lookup yielded a name
1888 that did not have a forward lookup, an error message of the form "no IP
1889 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1890 could be logged. Now it outputs the IP address instead of "NULL".
1892 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1893 allows the sender and the authenticated sender to be set when
1894 submitting a message from within Exim. Since child_open_exim() is
1895 documented for local_scan(), the new function should be too.
1897 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1898 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1899 results in an empty string is now treated as unset.
1901 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1903 PH/31 Added sender_verify_fail logging option.
1905 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1906 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1907 tidied the source and removed it altogether.
1909 PH/33 When a queue run was abandoned because the load average was too high, a
1910 log line was always written; now it is written only if the queue_run log
1911 selector is set. In addition, the log line for abandonment now contains
1912 information about the queue run such as the pid. This is always present
1913 in "start" and "stop" lines but was omitted from the "abandon" line.
1915 PH/34 Omit spaces between a header name and the colon in the error message that
1916 is given when verify = headers_syntax fails (if there are lots of them,
1917 the message gets confusing).
1919 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1920 names, as there are now some PTR records that contain slashes. This check
1921 is only to protect against broken name servers that fall over on strange
1922 characters, so the fact that it applies to all lookups doesn't matter.
1924 PH/36 Now that the new test suite is complete, we can remove some of the
1925 special code in Exim that was needed for the old test suite. For example,
1926 sorting DNS records because real resolvers return them in an arbitrary
1927 order. The new test suite's fake resolver always returns records in the
1930 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1931 bounces) except when queue_only is set, to avoid logging races between
1932 the different processes.
1934 PH/38 Panic-die if .include specifies a non-absolute path.
1936 PH/39 A tweak to the "H" retry rule from its user.
1938 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1939 a label. They prevented compilation on older perls.
1941 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1942 a warning to be raised on newish perls.
1944 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1945 on queue. Changes to match documented behaviour of showing count of
1946 messages matching specified criteria.
1948 PH/40 Changed the default ident timeout from 30s to 5s.
1950 PH/41 Added support for the use of login_cap features, on those BSD systems
1951 that have them, for controlling the resources used by pipe deliveries.
1953 PH/42 The content-scanning code uses fopen() to create files in which to put
1954 message data. Previously it was not paying any attention to the mode of
1955 the files. Exim runs with umask(0) because the rest of the code creates
1956 files with open(), and sets the required mode explicitly. Thus, these
1957 files were ending up world-writeable. This was not a big issue, because,
1958 being within the spool directory, they were not world-accessible. I have
1959 created a function called modefopen, which takes an additional mode
1960 argument. It sets umask(777), creates the file, chmods it to the required
1961 mode, then resets the umask. All the relevant calls to fopen() in the
1962 content scanning code have been changed to use this function.
1964 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1965 to 24 hours. This avoids potential overflow problems when processing G
1966 and H retry rules. I suspect nobody ever tinkers with this value.
1968 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1970 PH/45 When the plaintext authenticator is running as a client, the server's
1971 challenges are checked to ensure they are valid base64 strings. By
1972 default, the authentication attempt is cancelled if an invalid string is
1973 received. Setting client_ignore_invalid_base64 true ignores these errors.
1974 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1975 they are received. Thus, the responses can be made to depend on the
1976 challenges. If an invalid string is ignored, an empty string is placed in
1979 PH/46 Messages that are created by the autoreply transport now contains a
1980 References: header, in accordance with RFCs 2822 and 3834.
1982 PH/47 Added authenticated_sender_force to the smtp transport.
1984 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1986 PH/49 Installed latest patch from the Sieve maintainer.
1988 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1989 was also set, the appendfile transport was unnecessarily scanning a
1990 directory of message files (e.g. for maildir delivery) to find the count
1991 of files (along with the size), even though it did not need this
1992 information. It now does the scan only if it needs to find either the
1993 size of the count of files.
1995 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1997 PH/52 Two bugs concerned with error handling when the smtp transport is
2000 (i) Exim was not creating retry information for temporary errors given
2001 for individual recipients after the DATA command when the smtp transport
2002 was used in LMTP mode. This meant that they could be retried too
2003 frequently, and not timed out correctly.
2005 (ii) Exim was setting the flag that allows error details to be returned
2006 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2007 recipients that were returned after the DATA command.
2009 PH/53 This is related to PH/52, but is more general: for any failing address,
2010 when detailed error information was permitted to be returned to the
2011 sender, but the error was temporary, then after the final timeout, only
2012 "retry timeout exceeded" was returned. Now it returns the full error as
2013 well as "retry timeout exceeded".
2015 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2016 do this, and (what is worse) MTAs that accept it.
2018 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2019 will now be deprecated.
2021 PH/56 New os.c-cygwin from the Cygwin maintainer.
2023 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2024 formats (previously only available in exim formats via -bpr, -bpru,
2025 and -bpra. Now also available in native and exiqgrep formats)
2027 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2028 with very large, slow to parse queues
2030 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2032 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2034 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2035 responses to authentication challenges, though it was showing the
2036 challenges; (ii) I've removed the CR characters from the debug output for
2039 PH/58 Allow for the insertion of a newline as well as a space when a string
2040 is turned into more than one encoded-word during RFC 2047 encoding. The
2041 Sieve code now uses this.
2043 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2044 data_4xx, lost_connection, tls_required.
2046 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2047 message was being sent as an SMTP response.
2049 PH/61 Add -l and -k options to exicyclog.
2051 PH/62 When verifying, if an address was redirected to one new address, so that
2052 verification continued, and the new address failed or deferred after
2053 having set something in $address_data, the value of $address_data was not
2054 passed back to the ACL. This was different to the case when no
2055 redirection occurred. The value is now passed back in both cases.
2057 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2058 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2059 use login_cap.h, so on its own it isn't the distinguishing feature. The
2060 new name refers directly to the setclassresources() function.
2062 PH/65 Added configuration files for NetBSD3.
2064 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2066 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2067 is preferred over IPv4.
2069 PH/68 The bounce_return_message and bounce_return_body options were not being
2070 honoured for bounces generated during the reception of non-SMTP messages.
2071 In particular, this applied to messages rejected by the ACL. This bug has
2072 been fixed. However, if bounce_return_message is true and bounce_return_
2073 body is false, the headers that are returned for a non-SMTP message
2074 include only those that have been read before the error was detected.
2075 (In the case of an ACL rejection, they have all been read.)
2077 PH/69 The HTML version of the specification is now built in a directory called
2078 spec_html instead of spec.html, because the latter looks like a path with
2079 a MIME-type, and this confuses some software.
2081 PH/70 Catch two compiler warnings in sieve.c.
2083 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2084 function verify_get_ident() calls ip_connect() to connect a socket, but
2085 if the "connect()" function timed out, ip_connect() used to close the
2086 socket. However, verify_get_ident() also closes the socket later, and in
2087 between Exim writes to the log, which may get opened at this point. When
2088 the socket was closed in ip_connect(), the log could get the same file
2089 descriptor number as the socket. This naturally causes chaos. The fix is
2090 not to close the socket in ip_connect(); the socket should be closed by
2091 the function that creates it. There was only one place in the code where
2092 this was missing, in the iplookup router, which I don't think anybody now
2093 uses, but I've fixed it anyway.
2095 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2096 well as to direct DNS lookups. Otherwise the handling of names in host
2097 lists is inconsistent and therefore confusing.
2103 PH/01 Two changes to the default runtime configuration:
2105 (1) Move the checks for relay_from_hosts and authenticated clients from
2106 after to before the (commented out) DNS black list checks.
2108 (2) Add control=submission to the relay_from_hosts and authenticated
2109 clients checks, on the grounds that messages accepted by these
2110 statements are most likely to be submissions.
2112 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2114 (1) Generate an error if the third argument for the ${prvs expansion is
2117 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2120 (3) Reset the variables that are obtained from the first argument of
2121 ${prvscheck and used in the second argument before leaving the code,
2122 because their memory is reclaimed, so using them afterwards may do
2125 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2126 one (it's much easier than Tom thought :-).
2128 (5) Because of (4), we can now allow for the use of $prvscheck_result
2129 inside the third argument.
2131 PH/03 For some reason, the default setting of PATH when running a command from
2132 a pipe transport was just "/usr/bin". I have changed it to
2135 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2136 anything to be listed in the output from -bV.
2138 PH/05 When a filter generated an autoreply, the entire To: header line was
2139 quoted in the delivery log line, like this:
2141 => >A.N.Other <ano@some.domain> <original@ddress> ...
2143 This has been changed so that it extracts the operative address. There
2144 may be more than one such address. If so, they are comma-separated, like
2147 => >ano@some.domain,ona@other.domain <original@ddress> ...
2149 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2150 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2151 not being looked up in the rDNS to get a host name, Exim was showing the
2152 IP address twice in Received: lines, even though the IP addresses were
2153 identical. For example:
2155 Received: from [1.2.3.4] (helo=[1.2.3.4])
2157 However, if the real host name was known, it was omitting the HELO data
2158 if it matched the actual IP address. This has been tidied up so that it
2159 doesn't show the same IP address twice.
2161 PH/07 When both +timestamp and +memory debugging was on, the value given by
2162 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2163 called by the debug printing, thereby overwriting the timestamp buffer.
2164 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2166 PH/08 When the original message was included in an autoreply transport, it
2167 always said "this is a copy of the message, including all the headers",
2168 even if body_only or headers_only was set. It now gives an appropriate
2171 PH/09 Applied a patch from the Sieve maintainer which:
2173 o fixes some comments
2174 o adds the (disabled) notify extension core
2175 o adds some debug output for the result of if/elsif tests
2176 o points to the current vacation draft in the documentation
2177 and documents the missing references header update
2181 o fixes a bug in processing the envelope test (when testing
2182 multiple envelope elements, the last element determinted the
2185 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2186 Electronic Mail") by including:
2188 Auto-submitted: auto-generated
2190 in the messages that it generates (bounce messages and others, such as
2191 warnings). In the case of bounce messages for non-SMTP mesages, there was
2192 also a typo: it was using "Auto_submitted" (underscore instead of
2193 hyphen). Since every message generated by Exim is necessarily in response
2194 to another message, thes have all been changed to:
2196 Auto-Submitted: auto-replied
2198 in accordance with these statements in the RFC:
2200 The auto-replied keyword:
2202 - SHOULD be used on messages sent in direct response to another
2203 message by an automatic process,
2205 - MUST NOT be used on manually-generated messages,
2207 - MAY be used on Delivery Status Notifications (DSNs) and Message
2208 Disposition Notifications (MDNs),
2210 - MUST NOT be used on messages generated by automatic or periodic
2211 processes, except for messages which are automatic responses to
2214 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2215 to the default Received: header definition.
2217 PH/12 Added log selector acl_warn_skipped (default on).
2219 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2220 variables because (a) they are in the wrong storage pool and (b) even if
2221 they were copied, it wouldn't work properly because of the caching.
2223 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2224 checking when decoding. Apparently there are clients that generate
2225 overlong encoded strings. Why am I not surprised?
2227 PH/15 If the first argument of "${if match_address" was not empty, but did not
2228 contain an "@" character, Exim crashed. Now it writes a panic log message
2229 and treats the condition as false.
2231 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2233 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2234 extension "envelope-auth". The code is finished and in agreement with
2235 other implementations, but there is no documentation so far and in fact,
2236 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2237 not changing the active code.
2239 Print executed "if" and "elsif" statements when debugging is used. This
2240 helps a great deal to understand what a filter does.
2242 Document more things not specified clearly in RFC3028. I had all this
2243 sorted out, when out of a sudden new issues came to my mind. Oops."
2245 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2248 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2249 canonical form (as documented). However, after a host name lookup from
2250 the IP address, check_host() was doing a simple string comparison with
2251 addresses acquired from the DNS when checking that the found name did
2252 have the original IP as one of its addresses. Since any found IPv6
2253 addresses are likely to be in abbreviated form, the comparison could
2254 fail. Luckily, there already exists a function for doing the comparison
2255 by converting both addresses to binary, so now that is used instead of
2256 the text comparison.
2258 PH/20 There was another similar case to PH/19, when a complete host name was
2259 given in a host list; looking up its IP address could give an abbreviated
2260 form, whereas the current host's name might or might not be abbreviated.
2261 The same fix has been applied.
2267 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2268 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2271 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2272 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2274 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2276 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2277 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2278 Also, for "Auto-Submitted", treat anything other than "no" as
2279 non-personal, in accordance with RFC 3834. (Previously it treated
2280 anything starting "auto-" as non-personal.)
2282 TF/01 The control=submission/name=... option had a problem with syntax
2283 errors if the name included a slash character. The /name= option
2284 now slurps the rest of the string, so it can include any characters
2285 but it must come last in the list of options (after /sender_retain
2288 PH/05 Some modifications to the interface to the fake nameserver for the new
2296 TK/01 Added the "success_on_redirect" address verification option. See
2297 NewStuff for rationale and an example.
2299 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2301 PH/02 Patch to exigrep to allow it to work on syslog lines.
2303 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2304 fread() to skip over the body file's header line, because in Cygwin the
2305 header line is locked and is inaccessible.
2307 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2308 co-exist for some time) to make it clear that it is the Exim ID that is
2309 referenced, not the Message-ID: header line.
2311 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2312 string_format() function, because snprintf() does not exist on all
2315 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2316 ${stat: expansion item.
2318 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2319 protocol synchronization error", to keep the pedants happy.
2321 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2322 well as for IRIX systems, when gcc is being used. See the host.c source
2325 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2327 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2330 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2331 transport and to the smtp transport in LMTP mode.
2333 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2335 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2336 run a filter in a subprocess. This could lead to confusion in subsequent
2337 lookups in the parent process. There should also be a search_tidyup() at
2338 the end of the subprocess.
2340 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2341 only if the host matched helo_try_verify_hosts, which caused the
2342 verification to occur when the EHLO/HELO command was issued. The ACL just
2343 tested the remembered result. Now, if a previous verification attempt has
2344 not happened, "verify = helo" does it there and then.
2346 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2348 TK/03 Fix log output including CR from clamd.
2350 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2351 exist provoked a memory error which could cause a segfault.
2353 PH/15 Installed PCRE 6.2
2355 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2357 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2358 of the problem. Specifically, suggested +O2 rather than +O1 for the
2361 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2363 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2364 record, the port was not correctly logged when the outgoing_port log
2365 selector was set (it logged the transort's default port).
2367 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2368 fallback_hosts, and "hosts" in the smtp transport.
2370 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2371 host errors such as "Connection refused".
2373 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2374 authentication with radiusclient 0.4.9:
2376 - Error returned from rc_read_config was caught wrongly
2377 - Username/password not passed on to radius server due to wrong length.
2379 The presumption is that some radiusclient API changes for 4.51/PH/17
2380 were not taken care of correctly. The code is still untested by me (my
2381 Linux distribution still has 0.3.2 of radiusclient), but it was
2382 contributed by a Radius user.
2384 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2385 expanding the "port" option of the smtp transport.
2387 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2388 while reading a MIME header. Thanks to Tom Hughes for a patch.
2390 PH/24 Include config.h inside local_scan.h so that configuration settings are
2393 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2394 that in an ACL for RCPT (for example), you can examine exactly what was
2397 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2398 commands, but it was not correctly comparing the address with the actual
2399 client host address. Thus, it would show the EHLO address in Received:
2400 header lines when this was not necessary.
2402 PH/27 Added the % operator to ${eval:}.
2404 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2405 it should be ignoring failures (because with -C, for example, it has lost
2406 privilege). It wasn't ignoring creation failures other than "already
2409 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2412 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2413 because an input line was too long, either on its own, or by virtue of
2414 too many continuations, the temporary file was not being removed, and the
2415 return code was incorrect.
2417 PH/31 Missing "BOOL" in function definition in filtertest.c.
2419 PH/32 Applied Sieve patches from the maintainer.
2421 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2423 PH/33 Added "verify = not_blind".
2425 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2426 Local/Makefile (with some defaults set). These are used in built scripts
2427 such as exicyclog, but they have never been used in the exim_install
2428 script (though there are many overriding facilities there). I have
2429 arranged that the exim_install script now takes note of these two
2432 PH/35 Installed configuration files for Dragonfly.
2434 PH/36 When a locally submitted message by a trusted user did not contain a
2435 From: header, and the sender address was obtained from -f or from an SMTP
2436 MAIL command, and the trusted user did not use -F to supply a sender
2437 name, $originator_name was incorrectly used when constructing a From:
2438 header. Furthermore, $originator_name was used for submission mode
2439 messages from external hosts without From: headers in a similar way,
2440 which is clearly wrong.
2442 PH/37 Added control=suppress_local_fixups.
2444 PH/38 When log_selector = +received_sender was set, and the addition of the
2445 sender made the log line's construction buffer exactly full, or one byte
2446 less than full, an overflow happened when the terminating "\n" was
2449 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2450 when the result of a list match is failure because a DNS lookup failed.
2452 PH/40 RM_COMMAND is now used in the building process.
2454 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2455 the "build-* directories that it finds.
2457 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2458 address in a domain literal was a prefix of an interface address.
2460 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2461 when verifying a sender address, unless rewrite_headers is false.
2463 PH/44 Wrote a long comment about why errors_to addresses are verified as
2464 recipients, not senders.
2466 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2467 the ratelimit ACL was added.
2469 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2471 PH/46 Added extra information about PostgreSQL errors to the error string.
2473 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2474 avoiding the need to install special zones in a real server. This is
2475 backwards compatible; if it can't find the fake resolver, it drops back.
2476 Thus, both old and new test suites can be run.
2478 TF/02 Added util/ratelimit.pl
2480 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2481 clock is set back in time.
2483 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2484 Candler <B.Candler@pobox.com>.
2486 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2487 OK for addresses that are the result of redirections.
2489 PH/48 A number of further additions for the benefit of the new test suite,
2490 including a fake gethostbyname() that interfaces to the fake DNS resolver
2493 TF/06 The fix for widen_domains has also been applied to qualify_single and
2494 search_parents which are the other dnslookup options that can cause
2497 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2500 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2502 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2503 service" if it encountered an MX record with an empty target hostname.
2504 The message is now "an MX or SRV record indicated no SMTP service".
2506 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2507 if the DNS of the sending site is misconfigured. This is quite a
2508 common situation. This change restores the behaviour of treating a
2509 helo verification defer as a failure.
2511 PH/51 If self=fail was set on a router, the bounce message did not include the
2512 actual error message.
2518 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2520 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2521 command itself ended in error, the underlying message about the transport
2522 filter timeout was being overwritten with the pipe command error. Now the
2523 underlying error message should be appended to the second error message.
2525 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2527 PH/02 Reduce the amount of output that "make" produces by default. Full output
2528 can still be requested.
2530 PH/03 The warning log line about a condition test deferring for a "warn" verb
2531 was being output only once per connection, rather than after each
2532 occurrence (because it was using the same function as for successful
2533 "warn" verbs). This seems wrong, so I have changed it.
2535 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2536 it should not have, which might have caused a crash in the right
2537 circumstances, but probably never did.
2539 PH/04 Installed a modified version of Tony Finch's patch to make submission
2540 mode fix the return path as well as the Sender: header line, and to
2541 add a /name= option so that you can make the user's friendly name appear
2544 TF/03 Added the control = fakedefer ACL modifier.
2546 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2547 Mark Lowes for thorough testing.
2549 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2551 TK/03 Merged latest SRS patch from Miles Wilton.
2553 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2554 with the definition in sysexits.h (which is #included earlier).
2555 Fortunately, Exim does not actually use EX_OK. The code used to try to
2556 preserve the sysexits.h value, by assumimg that macro definitions were
2557 scanned for macro replacements. I have been disabused of this notion,
2558 so now the code just undefines EX_OK before #including unistd.h.
2560 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2561 in the smtp transport. When a block could not be written in a single
2562 write() function, the timeout was being re-applied to each part-write.
2563 This seems wrong - if the receiver was accepting one byte at a time it
2564 would take for ever. The timeout is now adjusted when this happens. It
2565 doesn't have to be particularly precise.
2567 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2568 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2570 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2571 without a domain if the check to <postmaster@domain> fails.
2573 SC/01 Eximstats: added -xls and the ability to specify output files
2574 (patch written by Frank Heydlauf).
2576 SC/02 Eximstats: use FileHandles for outputing results.
2578 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2580 SC/04 Eximstats: fixed display of large numbers with -nvr option
2582 SC/05 Eximstats: fixed merging of reports with empty tables.
2584 SC/06 Eximstats: added the -include_original_destination flag
2586 SC/07 Eximstats: removed tabs and trailing whitespace.
2588 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2590 TK/06 MBOX spool code: Add real "From " MBOX separator line
2591 so the .eml file is really in mbox format (even though
2592 most programs do not really care). Patch from Alex Miller.
2594 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2595 The latter is generated from $received_to and is only set if the
2596 message has one envelope recipient. SA can use these headers,
2597 obviously out-of-the-box. Patch from Alex Miller.
2599 PH/08 The ${def test on a variable was returning false if the variable's
2600 value was "0", contrary to what the specification has always said!
2601 The result should be true unless the variable is empty.
2603 PH/09 The syntax error of a character other than { following "${if
2604 def:variable_name" (after optional whitespace) was not being diagnosed.
2605 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2606 accidental colon was present, for example, could give incorrect results.
2608 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2609 result is used (not including appendfile, where other changes are about
2612 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2613 This involved changing a lot of size variables from int to off_t. It
2614 should work with maildirs and everything.
2616 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2617 spamd dying while we are connected to it.
2619 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2622 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2623 function for BDB 4.3.
2625 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2627 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2628 the sources for PCRE have been re-arranged and more files are now
2631 PH/15 The code I had for printing potentially long long variables in PH/11
2632 above was not the best (it lost precision). The length of off_t variables
2633 is now inspected at build time, and an appropriate printing format (%ld
2634 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2635 to be "long long int" or "long int". This is needed for the internal
2636 formatting function string_vformat().
2638 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2639 the configuration file to be ":syslog", then the script "guesses" where
2640 the logs files are, rather than using the compiled in default. In our
2641 case the guess is not the same as the compiled default, so the script
2642 suddenly stopped working when I started to use syslog. The patch checks
2643 to see if log_file_path is "". If so, it attempts to read it from exim
2644 with no configuration file to get the compiled in version, before it
2645 falls back to the previous guessing code."
2647 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2648 implementing BATV in an Exim configuration. See NewStuff for the gory
2651 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2652 Makefile that are specific to HP-UX.
2654 PH/18 If the "use_postmaster" option was set for a recipient callout together
2655 with the "random" option, the postmaster address was used as the MAIL
2656 FROM address for the random test, but not for the subsequent recipient
2657 test. It is now used for both.
2659 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2660 patch removes a few documentation additions to RFC 3028, because the
2661 latest draft now contains them. It adds the new en;ascii-case comparator
2662 and a new error check for 8bit text in MIME parts. Comparator and
2663 require names are now matched exactly. I enabled the subaddress
2664 extension, but it is not well tested yet (read: it works for me)."
2666 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2667 rework some of the code of TK/09 above to avoid the hardwired use of
2668 "%lld" and "long long". Replaced the call to snprintf() with a call to
2671 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2672 records point to non-existent hosts", "retry timeout exceeded", and
2673 "retry time not reached for any host after a long failure period".
2675 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2676 experimental DomainKeys support:
2678 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2679 (2) On an error such as an illegally used "control", the wrong name for
2680 the control was given.
2682 These problems did NOT occur unless DomainKeys support was compiled.
2684 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2686 PH/24 Added ${if match_ip condition.
2688 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2689 databases so that it will be absolutely obvious if a crash occurs in the
2690 DB library. This is a regular occurrence (often caused by mis-matched
2693 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2694 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2695 picked up on a user's system that detects such things. There doesn't seem
2696 to be a gcc warning option for this - only an attribute that has to be
2697 put on the function's prototype. It seems that in Fedora Core 4 they have
2698 set this on a number of new functions. No doubt there will be more in due
2701 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2702 specify a transport. However, if an address that was verified by such a
2703 router was the subject of a callout, Exim crashed because it tried to
2704 read the rcpt_include_affixes from the non-existent transport. Now it
2705 just assumes that the setting of that option is false. This bug was
2706 introduced by 4.51/PH/31.
2708 PH/28 Changed -d+all to exclude +memory, because that information is very
2709 rarely of interest, but it makes the output a lot bigger. People tend to
2710 do -d+all out of habit.
2712 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2713 code in os-type was giving problems when libc.so lives in lib64, like on
2716 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2717 aren't the modern standard, and it seems that some systems' include files
2718 don't always have them. Exim was already checking for some of the newer
2719 ones like T_AAAA, and defining it itself. I've added checks for all the
2720 record types that Exim uses.
2722 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2723 not automatically generating a new one, as it is supposed to. This
2724 prevented TLS from working. If the file did exist, but contained invalid
2725 data, a new version was generated, as expected. It was only the case of a
2726 non-existent file that was broken.
2728 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2729 with a change in libdomainkeys > 0.64.
2731 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2732 from DNS. If the selector record carries the flag, it now has
2733 precedence over the domain-wide flag.
2735 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2737 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2738 the use of a port name that isn't defined in /etc/services) occurred, the
2739 message was deferred as in a normal delivery, and thus remained on the
2740 spool, instead of being failed because of the mua_wrapper setting. This
2741 is now fixed, and I tidied up some of the mua_wrapper messages at the
2744 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2745 the messages in a hash of arrays rather than using individual hashes.
2746 This is a bit cleaner and results in dramatic memory savings, albeit
2747 at a slight CPU cost.
2749 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2750 as requested by Marc Sherman.
2752 SC/10 Eximstats: added histograms for user specified patterns as requested
2755 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2757 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2758 fopen() in the content-scanning modules that did not already have it.
2764 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2765 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2767 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2769 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2771 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2772 to test Sieve filters that use "vacation".
2774 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2775 that changes the way the GnuTLS parameters are stored in the cache file.
2776 The new format can be generated externally. For backward compatibility,
2777 if the data in the cache doesn't make sense, Exim assumes it has read an
2778 old-format file, and it generates new data and writes a new file. This
2779 means that you can't go back to an older release without removing the
2782 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2783 work if there are any delivery delays because "one_time" forces the
2784 parent to be marked "delivered", so its unseen clone is never tried
2785 again. For this reason, Exim now forbids the simultaneous setting of
2788 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2789 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2790 entry if you want to know the details. The fix, however, neglected to
2791 consider the case when local delivery batching is involved. The test for
2792 "previously delivered" was not happening when checking to see if an
2793 address could be batched with a previous (undelivered) one; under
2794 certain circumstances this could lead to multiple deliveries to the same
2797 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2798 in its include files, and this causes problems building Exim.
2800 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2801 header_syntax) but Exim was just ignoring anything given after a slash.
2802 In particular, this caused confusion with an attempt to use "verify =
2803 reverse_host_lookup/defer_ok". An error is now given when options are
2804 supplied for verify items that do not have them. (Maybe reverse_host_
2805 lookup should have a defer_ok option, but that's a different point.)
2807 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2808 defined by RFC 821) to 2048, because there were problems with some AUTH
2809 commands, and RFC 1869 says the size should be increased for extended
2810 SMTP commands that take arguments.
2812 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2815 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2816 "unknown" error; now it says that the functionality isn't in the binary.
2818 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2819 an address' error message when a string expansion fails (syntax or
2820 whatever). Otherwise the password may appear in the log. Following change
2821 PH/42 below, there is no longer a chance of it appearing in a bounce
2824 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2826 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2827 of its addresses was ever tried. (Bugzilla bug #2.)
2829 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2830 the result incorrectly in the debug output. (It correctly added a newline
2831 to what was transported.)
2833 TF/01 Added $received_time.
2835 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2836 commented out examples of how to interface to a virus scanner and to
2837 SpamAssassin. Also added commented examples of av_scanner and
2838 spamd_address settings.
2840 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2841 and controls are allowed in which ACLs. There were a couple of minor
2842 errors. Some of the entries in the conditions table (which is a table of
2843 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2844 negation of where the condition IS allowed.
2846 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2848 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2849 header file does not have a version number, so I've had to invent a new
2850 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2851 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2852 radiusclient), but it was contributed by a Radius user.
2854 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2855 files or directories, for OpenSSL.
2857 PH/19 When an Exim process that is running as root has to create an Exim log
2858 file, it does so in a subprocess that runs as exim:exim so as to get the
2859 ownership right at creation (otherwise, other Exim processes might see
2860 the file with the wrong ownership). There was no test for failure of this
2861 fork() call, which would lead to the process getting stuck as it waited
2862 for a non-existent subprocess. Forks do occasionally fail when resources
2863 run out. I reviewed all the other calls to fork(); they all seem to check
2866 PH/20 When checking for unexpected SMTP input at connect time (before writing
2867 the banner), Exim was not dealing correctly with a non-positive return
2868 from the read() function. If the client had disconnected by this time,
2869 the result was a log entry for a synchronization error with an empty
2870 string after "input=" when read() returned zero. If read() returned -1
2871 (an event I could not check), uninitialized data bytes were printed.
2872 There were reports of junk text (parts of files, etc) appearing after
2875 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2877 PH/22 Added support for macro redefinition, and (re)definition in between
2878 driver and ACL definitions.
2880 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2881 forgetting to use the resulting value; it was using the unexpanded value.
2883 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2884 hadn't been configured. The fix is from Juergen Kreileder, who
2885 understands it better than I do:
2887 "Here's what I see happening with three configured cyrus_sasl
2888 authenticators configured (plain, login, cram-md5):
2890 On startup auth_cyrus_sasl_init() gets called for each of these.
2891 This means three calls to sasl_listmech() without a specified mech_list.
2892 => SASL tests which mechs of all available mechs actually work
2893 => three warnings about OTP not working
2894 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2896 With the patch, sasl_listmech() also gets called three times. But now
2897 SASL's mech_list option is set to the server_mech specified in the the
2898 authenticator. Or in other words, the answer from sasl_listmech()
2899 gets limited to just the mech you're testing for (which is different
2901 => the return list contains just 'plain' or 'login', 'cram-md5' or
2902 nothing depending on the value of ob->server_mech.
2904 I've just tested the patch: Authentication still works fine,
2905 unavailable mechs specified in the exim configuration are still
2906 caught, and the auth.log warnings about OTP are gone."
2908 PH/25 When debugging is enabled, the contents of the command line are added
2909 to the debugging output, even when log_selector=+arguments is not
2912 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2913 answer is "GNU", and only if the return is "GNU/something" is the answer
2916 PH/27 $acl_verify_message is now set immediately after the failure of a
2917 verification in an ACL, and so is available in subsequent modifiers. In
2918 particular, the message can be preserved by coding like this:
2920 warn !verify = sender
2921 set acl_m0 = $acl_verify_message
2923 Previously, $acl_verify_message was set only while expanding "message"
2924 and "log_message" when a very denied access.
2926 PH/28 Modified OS/os.c-Linux with
2928 -#ifndef OS_LOAD_AVERAGE
2929 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2931 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2932 nomenclature these days.)
2934 PH/29 Installed patch from the Sieve maintainer that adds the options
2935 sieve_useraddress and sieve_subaddress to the redirect router.
2937 PH/30 In these circumstances:
2938 . Two addresses routed to the same list of hosts;
2939 . First host does not offer TLS;
2940 . First host accepts first address;
2941 . First host gives temporary error to second address;
2942 . Second host offers TLS and a TLS session is established;
2943 . Second host accepts second address.
2944 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2945 and peerdn, if requested) that were in fact used only for the second
2948 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2949 attention to any local part prefix or suffix that was matched by the
2950 router that accepted the address. It now behaves in the same way as it
2951 does for delivery: the affixes are removed from the local part unless
2952 rcpt_include_affixes is set on the transport.
2954 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2955 timeout during the DATA phase of an incoming message.
2957 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2958 applied a patch sanctioned by the Sieve maintainer.
2960 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2961 the uid or gid is negative. A case of a negative gid caused this to be
2962 noticed. The fix allows for either to be negative.
2964 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2965 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2968 PH/36 The change PH/12 above was broken. Fixed it.
2970 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2971 the grounds that routing the same address twice would always produce the
2972 same answer. This might have been true once, but it is certainly no
2973 longer true now. Routing a child address may depend on the previous
2974 routing that produced that child. Some complicated redirection strategies
2975 went wrong when messages had multiple recipients, and made Exim's
2976 behaviour dependent on the order in which the addresses were given.
2978 I have moved the duplicate checking until after the routing is complete.
2979 Exim scans the addresses that are assigned to local and remote
2980 transports, and removes any duplicates. This means that more work will be
2981 done, as duplicates will always all be routed, but duplicates are
2982 presumably rare, so I don't expect this is of any significance.
2984 For deliveries to pipes, files, and autoreplies, the duplicate checking
2985 still happens during the routing process, since they are not going to be
2988 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2989 It corrects a timeout issue with spamd. This is Ian's comment: "The
2990 background is that sometimes spamd either never reads data from a
2991 connection it has accepted, or it never writes response data. The exiscan
2992 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2993 blindly assumes that writes won't block so it may never time out."
2995 PH/39 Allow G after quota size as well as K and M.
2997 PH/40 The value set for $authenticated_id in an authenticator may not contain
2998 binary zeroes or newlines because the value is written to log lines and
2999 to spool files. There was no check on this. Now the value is run through
3000 the string_printing() function so that such characters are converted to
3001 printable escape sequences.
3003 PH/41 $message_linecount is a new variable that contains the total number of
3004 lines in the message. Compare $body_linecount, which is the count for the
3007 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3008 bounce and delay warning messages, except in certain special cases, which
3011 (a) An SMTP error message from a remote host;
3012 (b) A message specified in a :fail: redirection;
3013 (c) A message specified in a "fail" command in a system filter;
3014 (d) A message specified in a FAIL return from the queryprogram router;
3015 (e) A message specified by the cannot_route_message router option.
3017 In these cases only, Exim does include the error details in bounce and
3018 warning messages. There are also a few cases where bland messages such
3019 as "unrouteable address" or "local delivery error" are given.
3021 PH/43 $value is now also set for the "else" part of a ${run expansion.
3023 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3024 being worked on, but at least Exim now implements the latest version to
3027 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3028 process to complete was treated as a delivery failure, a timeout while
3029 writing the message to the pipe was logged, but erroneously treated as a
3030 successful delivery. Such timeouts include transport filter timeouts. For
3031 consistency with the overall process timeout, these timeouts are now
3032 treated as errors, giving rise to delivery failures by default. However,
3033 there is now a new Boolean option for the pipe transport called
3034 timeout_defer, which, if set TRUE, converts the failures into defers for
3035 both kinds of timeout. A transport filter timeout is now identified in
3038 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3039 systems where "make" and "gmake" are different, calling "gmake" at top
3040 level broke things. I've arranged for the value of $(MAKE) to be passed
3041 from the Makefile to this script so that it can call the same version of
3045 A note about Exim versions 4.44 and 4.50
3046 ----------------------------------------
3048 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3049 changes of various kinds. As a consequence, a big documentation update was
3050 needed. This delayed the release for rather longer than seemed good, especially
3051 in the light of a couple of (minor) security issues. Therefore, the changes
3052 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3053 release. So 4.44 and 4.50 are in effect two different branches that both start
3056 I have left the 4.50 change log unchanged; it contains all the changes since
3057 4.43. The change log for 4.44 is below; many of its items are identical to
3058 those for 4.50. This seems to be the most sensible way to preserve the
3059 historical information.
3065 1. Minor wording change to the doc/README.SIEVE file.
3067 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3068 computation of the current number of files was incorrect.
3070 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3071 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3074 4. Give more explanation in the error message when the command for a transport
3075 filter fails to execute.
3077 5. There are several places where Exim runs a non-Exim command in a
3078 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3079 was being done only for the command run by the queryprogram router. It is
3080 now done for all such subprocesses. The other cases are: ${run, transport
3081 filters, and the commands run by the lmtp and pipe transports.
3083 6. Added CONFIGURE_GROUP build-time option.
3085 7. Some older OS have a limit of 256 on the maximum number of file
3086 descriptors. Exim was using setrlimit() to set 1000 as a large value
3087 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3088 systems. I've change it so that if it can't get 1000, it tries for 256.
3090 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3091 was an oversight, and furthermore, ever since the addition of extra
3092 controls (e.g. 4.43/32), the checks on when to allow different forms of
3093 "control" were broken. There should now be diagnostics for all cases when a
3094 control that does not make sense is encountered.
3096 9. Added the /retain_sender option to "control=submission".
3098 10. $recipients is now available in the predata ACL (oversight).
3100 11. Tidy the search cache before the fork to do a delivery from a message
3101 received from the command line. Otherwise the child will trigger a lookup
3102 failure and thereby defer the delivery if it tries to use (for example) a
3103 cached ldap connection that the parent has called unbind on.
3105 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3106 of $address_data from the recipient verification was clobbered by the
3107 sender verification.
3109 13. The value of address_data from a sender verification is now available in
3110 $sender_address_data in subsequent conditions in the ACL statement.
3112 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3114 15. Added a new option "connect=<time>" to callout options, to set a different
3117 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3118 was its contents. (It was OK if the option was not defined at all.)
3120 17. A "Completed" log line is now written for messages that are removed from
3121 the spool by the -Mrm option.
3123 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3124 information about exactly what failed.
3126 19. Added -dd to debug only the daemon process.
3128 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3129 handles timeouts, both on the server side and network timeouts. Renamed the
3130 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3132 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3133 It is now set to "smtps".
3135 22. $host_address is now set to the target address during the checking of
3136 ignore_target_hosts.
3138 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3139 being passed; this would have caused $sender_host_name to have been used if
3140 matching the list had actually called for a host name (not very likely,
3141 since this list is usually IP addresses). A host name is now passed as
3144 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3145 code that specifies a non-restarting handler (typically sigaction() in
3146 modern systems) in an attempt to fix a rare and obscure crash bug.
3148 25. Narrowed the window for a race in the daemon that could cause it to ignore
3149 SIGCHLD signals. This is not a major problem, because they are used only to
3150 wake it up if nothing else does.
3152 26. A malformed maildirsize file could cause Exim to calculate negative values
3153 for the mailbox size or file count. Odd effects could occur as a result.
3154 The maildirsize information is now recalculated if the size or filecount
3157 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3158 support for a long time. Removed HAVE_SYS_VFS_H.
3160 28. Installed the latest version of exipick from John Jetmore.
3162 29. In an address list, if the pattern was not a regular expression, an empty
3163 subject address (from a bounce message) matched only if the pattern was an
3164 empty string. Non-empty patterns were not even tested. This was the wrong
3165 because it is perfectly reasonable to use an empty address as part of a
3166 database query. An empty address is now tested by patterns that are
3167 lookups. However, all the other forms of pattern expect the subject to
3168 contain a local part and a domain, and therefore, for them, an empty
3169 address still always fails if the pattern is not itself empty.
3171 30. Exim went into a mad DNS loop when attempting to do a callout where the
3172 host was specified on an smtp transport, and looking it up yielded more
3173 than one IP address.
3175 31. Re-factored the code for checking spool and log partition space into a
3176 function that finds that data and another that does the check. The former
3177 is then used to implement four new variables: $spool_space, $log_space,
3178 $spool_inodes, and $log_inodes.
3180 32. The RFC2047 encoding function was originally intended for short strings
3181 such as real names; it was not keeping to the 75-character limit for
3182 encoded words that the RFC imposes. It now respects the limit, and
3183 generates multiple encoded words if necessary. To be on the safe side, I
3184 have increased the buffer size for the ${rfc2047: expansion operator from
3187 33. It is now permitted to omit both strings after an "if" condition; if the
3188 condition is true, the result is "true". As before, when the second string
3189 is omitted, a false condition yields an empty string. This makes it less
3190 cumbersome to write custom ACL and router conditions.
3192 34. Failure to deliver a bounce message always caused it to be frozen, even if
3193 there was an errors_to setting on the router. The errors_to setting is now
3196 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3197 canonical form (fully expanded) before being placed in
3198 $sender_host_address.
3200 36. The table in the code that translates DNS record types into text (T_A to
3201 "A" for instance) was missing entries for NS and CNAME. It is just possible
3202 that this could have caused confusion if both these types were looked up
3203 for the same domain, because the text type is used as part of Exim's
3204 per-process caching. But the chance of anyone hitting this buglet seems
3207 37. The dnsdb lookup has been extended in a number of ways.
3209 (1) There is a new type, "zns", which walks up the domain tree until it
3210 finds some nameserver records. It should be used with care.
3212 (2) There is a new type, "mxh", which is like "mx" except that it returns
3213 just the host names, not the priorities.
3215 (3) It is now possible to give a list of domains (or IP addresses) to be
3216 looked up. The behaviour when one of the lookups defers can be
3217 controlled by a keyword.
3219 (4) It is now possible to specify the separator character for use when
3220 multiple records are returned.
3222 38. The dnslists ACL condition has been extended: it is now possible to supply
3223 a list of IP addresses and/or domains to be looked up in a particular DNS
3226 39. Added log_selector=+queue_time_overall.
3228 40. When running the queue in the test harness, wait just a tad after forking a
3229 delivery process, to get repeatability of debugging output.
3231 41. Include certificate and key file names in error message when GnuTLS fails
3232 to set them up, because the GnuTLS error message doesn't include the name
3233 of the failing file when there is a problem reading it.
3235 42. Allow both -bf and -bF in the same test run.
3237 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3239 44. The "Exiscan patch" is now merged into the mainline Exim source.
3241 45. Sometimes the final signoff response after QUIT could fail to get
3242 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3243 < 0 before doing a fflush(). This bug looks as though it goes back to the
3244 introduction of TLS in release 3.20, but "sometimes" must have been rare
3245 because the tests only now provoked it.
3247 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3248 (this can affect the format of dates).
3250 47. exim_tidydb, when checking for the continued existence of a message for
3251 which it has found a message-specific retry record, was not finding
3252 messages that were in split spool directories. Consequently, it was
3253 deleting retry records that should have stayed in existence.
3255 48. Steve fixed some bugs in eximstats.
3257 49. The SPA authentication driver was not abandoning authentication and moving
3258 on to the next authenticator when an expansion was forced to fail,
3259 contradicting the general specification for all authenticators. Instead it
3260 was generating a temporary error. It now behaves as specified.
3262 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3263 (the order specifies the preference for clients). The order is now AES256,
3264 AES128, 3DES, ARCFOUR128.
3266 51. Small patch to Sieve code - explicitly set From: when generating an
3269 52. Exim crashed if a remote delivery caused a very long error message to be
3270 recorded - for instance if somebody sent an entire SpamAssassin report back
3271 as a large number of 550 error lines. This bug was coincidentally fixed by
3272 increasing the size of one of Exim's internal buffers (big_buffer) that
3273 happened as part of the Exiscan merge. However, to be on the safe side, I
3274 have made the code more robust (and fixed the comments that describe what
3277 53. Now that there can be additional text after "Completed" in log lines (if
3278 the queue_time_overall log selector is set), a one-byte patch to exigrep
3279 was needed to allow it to recognize "Completed" as not the last thing in
3282 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3283 patch that reportedly fixes this has been added. I am not expert enough to
3284 create a test for it. This is what the patch creator wrote:
3286 "I found a little strange behaviour of ldap code when working with
3287 Windows 2003 AD Domain, where users was placed in more than one
3288 Organization Units. When I tried to give exim partial DN, the exit code
3289 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3290 But simultaneously result of request was absolutely normal ldap result,
3291 so I produce this patch..."
3293 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3294 REFERENCE, so I have modified the code to exclude the patch when that macro
3297 55. Some experimental protocols are using DNS PTR records for new purposes. The
3298 keys for these records are domain names, not reversed IP addresses. The
3299 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3300 leaves it alone. Component reversal etc. now happens only for IP addresses.
3303 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3305 57. Double the size of the debug message buffer (to 2048) so that more of very
3306 long debug lines gets shown.
3308 58. The exicyclog utility now does better if the number of log files to keep
3309 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3311 59. Two changes related to the smtp_active_hostname option:
3313 (1) $smtp_active_hostname is now available as a variable.
3314 (2) The default for smtp_banner uses $smtp_active_hostname instead
3315 of $primary_hostname.
3317 60. The host_aton() function is supposed to be passed a string that is known
3318 to be a valid IP address. However, in the case of IPv6 addresses, it was
3319 not checking this. This is a hostage to fortune. Exim now panics and dies
3320 if the condition is not met. A case was found where this could be provoked
3321 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3322 components; fortuitously, this particular loophole had already been fixed
3323 by change 4.50/55 above.
3325 If there are any other similar loopholes, the new check in host_aton()
3326 itself should stop them being exploited. The report I received stated that
3327 data on the command line could provoke the exploit when Exim was running as
3328 exim, but did not say which command line option was involved. All I could
3329 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3330 running as the user.
3333 61. There was a buffer overflow vulnerability in the SPA authentication code
3334 (which came originally from the Samba project). I have added a test to the
3335 spa_base64_to_bits() function which I hope fixes it.
3338 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3339 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3341 63. The daemon start-up calls getloadavg() while still root for those OS that
3342 need the first call to be done as root, but it missed one case: when
3343 deliver_queue_load_max is set with deliver_drop_privilege. This is
3344 necessary for the benefit of the queue runner, because there is no re-exec
3345 when deliver_drop_privilege is set.
3347 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3348 This has been fixed.
3350 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3351 was in use, was not putting the data itself into the right store pool;
3352 consequently, it could be overwritten for a subsequent message in the same
3353 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3356 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3358 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3359 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3360 the function were treating the return as a boolean value, which happened to
3361 work because 0=false and not-0=true, but is not correct code.
3363 68. The host_aton() function was not handling scoped IPv6 addresses (those
3364 with, for example, "%eth0" on the end) correctly.
3366 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3367 negated items (that is, ~something) in unsigned ints. Some compilers
3368 apparently mutter when there is no cast.
3370 70. If an address verification called from an ACL failed, and did not produce a
3371 user-specific message (i.e. there was only a "system" message), nothing was
3372 put in $acl_verify_message. In this situation, it now puts the system
3375 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3376 session; change 4.31/43 added the unwanted input to the log line - except
3377 that it did not do this in the start of session case. It now does.
3379 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3380 This is wrong and can cause the other end to generate a synchronization
3381 error if it is another Exim or anything else that does the synchronization
3382 check. A QUIT command is no longer sent after a timeout.
3384 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3385 during host lookups.
3387 74. The defer_ok option of callout verification was not working if it was used
3388 when verifying addresses in header lines, that is, for this case:
3390 verify = header_sender/callout=defer_ok
3392 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3393 those file descriptors could be used for SMTP connections. If anything
3394 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3395 could be sent to the SMTP client, causing chaos. The daemon now opens
3396 stdin, stdout, and stderr to /dev/null when it puts itself into the
3399 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3400 log by default. The user can override this with suitable Perl magic.
3402 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3403 the log message when discard triggers, was not working for the DATA ACL or
3404 for the non-SMTP ACL.
3406 78. Error message wording change in sieve.c.
3408 79. If smtp_accept_max_per_host was set, the number of connections could be
3409 restricted to fewer than expected, because the daemon was trying to set up
3410 a new connection before checking whether the processes handling previous
3411 connections had finished. The check for completed processes is now done
3412 earlier. On busy systems, this bug wouldn't be noticed because something
3413 else would have woken the daemon, and it would have reaped the completed
3416 80. If a message was submitted locally by a user whose login name contained one
3417 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3418 It caused a spool format error. I have fixed the spool reading code. A
3419 related problem was that the "from" clause in the Received: line became
3420 illegal because of the space(s). It is now covered by ${quote_local_part.
3422 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3425 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3427 83. Patch from Sieve maintainer to fix unterminated string problem in
3428 "vacation" handling.
3430 84. Some minor changes to the Linux configuration files to help with other
3431 OS variants using glibc.
3433 85. One more patch for Sieve to update vacation handling to latest spec.
3436 ----------------------------------------------------
3437 See the note above about the 4.44 and 4.50 releases.
3438 ----------------------------------------------------
3444 1. Change 4.43/35 introduced a bug that caused file counts to be
3445 incorrectly computed when quota_filecount was set in an appendfile
3448 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3449 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3452 3. Give more explanation in the error message when the command for a transport
3453 filter fails to execute.
3455 4. There are several places where Exim runs a non-Exim command in a
3456 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3457 was being done only for the command run by the queryprogram router. It is
3458 now done for all such subprocesses. The other cases are: ${run, transport
3459 filters, and the commands run by the lmtp and pipe transports.
3461 5. Some older OS have a limit of 256 on the maximum number of file
3462 descriptors. Exim was using setrlimit() to set 1000 as a large value
3463 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3464 systems. I've change it so that if it can't get 1000, it tries for 256.
3466 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3467 was an oversight, and furthermore, ever since the addition of extra
3468 controls (e.g. 4.43/32), the checks on when to allow different forms of
3469 "control" were broken. There should now be diagnostics for all cases when a
3470 control that does not make sense is encountered.
3472 7. $recipients is now available in the predata ACL (oversight).
3474 8. Tidy the search cache before the fork to do a delivery from a message
3475 received from the command line. Otherwise the child will trigger a lookup
3476 failure and thereby defer the delivery if it tries to use (for example) a
3477 cached ldap connection that the parent has called unbind on.
3479 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3480 of $address_data from the recipient verification was clobbered by the
3481 sender verification.
3483 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3484 was its contents. (It was OK if the option was not defined at all.)
3486 11. A "Completed" log line is now written for messages that are removed from
3487 the spool by the -Mrm option.
3489 12. $host_address is now set to the target address during the checking of
3490 ignore_target_hosts.
3492 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3493 being passed; this would have caused $sender_host_name to have been used if
3494 matching the list had actually called for a host name (not very likely,
3495 since this list is usually IP addresses). A host name is now passed as
3498 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3499 code that specifies a non-restarting handler (typically sigaction() in
3500 modern systems) in an attempt to fix a rare and obscure crash bug.
3502 15. Narrowed the window for a race in the daemon that could cause it to ignore
3503 SIGCHLD signals. This is not a major problem, because they are used only to
3504 wake it up if nothing else does.
3506 16. A malformed maildirsize file could cause Exim to calculate negative values
3507 for the mailbox size or file count. Odd effects could occur as a result.
3508 The maildirsize information is now recalculated if the size or filecount
3511 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3512 support for a long time. Removed HAVE_SYS_VFS_H.
3514 18. Updated exipick to current release from John Jetmore.
3516 19. Allow an empty sender to be matched against a lookup in an address list.
3517 Previously the only cases considered were a regular expression, or an
3520 20. Exim went into a mad DNS lookup loop when doing a callout where the
3521 host was specified on the transport, if the DNS lookup yielded more than
3524 21. The RFC2047 encoding function was originally intended for short strings
3525 such as real names; it was not keeping to the 75-character limit for
3526 encoded words that the RFC imposes. It now respects the limit, and
3527 generates multiple encoded words if necessary. To be on the safe side, I
3528 have increased the buffer size for the ${rfc2047: expansion operator from
3531 22. Failure to deliver a bounce message always caused it to be frozen, even if
3532 there was an errors_to setting on the router. The errors_to setting is now
3535 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3536 canonical form (fully expanded) before being placed in
3537 $sender_host_address.
3539 24. Updated eximstats to version 1.33
3541 25. Include certificate and key file names in error message when GnuTLS fails
3542 to set them up, because the GnuTLS error message doesn't include the name
3543 of the failing file when there is a problem reading it.
3545 26. Expand error message when OpenSSL has problems setting up cert/key files.
3548 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3549 (this can affect the format of dates).
3551 28. exim_tidydb, when checking for the continued existence of a message for
3552 which it has found a message-specific retry record, was not finding
3553 messages that were in split spool directories. Consequently, it was
3554 deleting retry records that should have stayed in existence.
3556 29. eximstats updated to version 1.35
3557 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3558 1.35 - bugfix such that pie charts by volume are generated correctly
3560 30. The SPA authentication driver was not abandoning authentication and moving
3561 on to the next authenticator when an expansion was forced to fail,
3562 contradicting the general specification for all authenticators. Instead it
3563 was generating a temporary error. It now behaves as specified.
3565 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3566 (the order specifies the preference for clients). The order is now AES256,
3567 AES128, 3DES, ARCFOUR128.
3569 31. Small patch to Sieve code - explicitly set From: when generating an
3572 32. Exim crashed if a remote delivery caused a very long error message to be
3573 recorded - for instance if somebody sent an entire SpamAssassin report back
3574 as a large number of 550 error lines. This bug was coincidentally fixed by
3575 increasing the size of one of Exim's internal buffers (big_buffer) that
3576 happened as part of the Exiscan merge. However, to be on the safe side, I
3577 have made the code more robust (and fixed the comments that describe what
3580 33. Some experimental protocols are using DNS PTR records for new purposes. The
3581 keys for these records are domain names, not reversed IP addresses. The
3582 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3583 leaves it alone. Component reversal etc. now happens only for IP addresses.
3586 34. The host_aton() function is supposed to be passed a string that is known
3587 to be a valid IP address. However, in the case of IPv6 addresses, it was
3588 not checking this. This is a hostage to fortune. Exim now panics and dies
3589 if the condition is not met. A case was found where this could be provoked
3590 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3591 components; fortuitously, this particular loophole had already been fixed
3592 by change 4.50/55 or 4.44/33 above.
3594 If there are any other similar loopholes, the new check in host_aton()
3595 itself should stop them being exploited. The report I received stated that
3596 data on the command line could provoke the exploit when Exim was running as
3597 exim, but did not say which command line option was involved. All I could
3598 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3599 running as the user.
3602 35. There was a buffer overflow vulnerability in the SPA authentication code
3603 (which came originally from the Samba project). I have added a test to the
3604 spa_base64_to_bits() function which I hope fixes it.
3607 36. The daemon start-up calls getloadavg() while still root for those OS that
3608 need the first call to be done as root, but it missed one case: when
3609 deliver_queue_load_max is set with deliver_drop_privilege. This is
3610 necessary for the benefit of the queue runner, because there is no re-exec
3611 when deliver_drop_privilege is set.
3613 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3614 was in use, was not putting the data itself into the right store pool;
3615 consequently, it could be overwritten for a subsequent message in the same
3616 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3619 38. Sometimes the final signoff response after QUIT could fail to get
3620 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3621 < 0 before doing a fflush(). This bug looks as though it goes back to the
3622 introduction of TLS in release 3.20, but "sometimes" must have been rare
3623 because the tests only now provoked it.
3629 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3630 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3631 Now it returns an integer. A number of calls were still expecting a T/F
3632 return. Fortuitously, in all cases, the tests worked in OK situations,
3633 which is the norm. However, things would have gone wrong on any write
3634 failures on the smtp file descriptor. This function is used when sending
3635 messages over SMTP and also when doing verify callouts.
3637 2. When Exim is called to do synchronous delivery of a locally submitted
3638 message (the -odf or -odi options), it no longer closes stderr before doing
3641 3. Implemented the mua_wrapper option.
3643 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3645 5. Implemented the functions header_remove(), header_testname(),
3646 header_add_at_position(), and receive_remove_recipient(), and exported them
3649 6. If an ACL "warn" statement specified the addition of headers, Exim already
3650 inserted X-ACL-Warn: at the start if there was no header name. However, it
3651 was not making this test for the second and subsequent header lines if
3652 there were newlines in the string. This meant that an invalid header could
3653 be inserted if Exim was badly configured.
3655 7. Allow an ACL "warn" statement to add header lines at the start or after all
3656 the Received: headers, as well as at the end.
3658 8. Added the rcpt_4xx retry error code.
3660 9. Added postmaster_mailfrom=xxx to callout verification option.
3662 10. Added mailfrom=xxxx to the callout verification option, for verify=
3665 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3666 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3668 12. Inserted some casts to stop certain compilers warning when using pointer
3669 differences as field lengths or precisions in printf-type calls (mostly
3670 affecting debugging statements).
3672 13. Added optional readline() support for -be (dynamically loaded).
3674 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3675 same clock tick as a message's arrival, so that its received time was the
3676 same as the "first fail" time on the retry record, and that message
3677 remained on the queue past the ultimate address timeout, every queue runner
3678 would try a delivery (because it was past the ultimate address timeout) but
3679 after another failure, the ultimate address timeout, which should have then
3680 bounced the address, did not kick in. This was a "< instead of <=" error;
3681 in most cases the first failure would have been in the next clock tick
3682 after the received time, and all would be well.
3684 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3685 being recognized when the domain list was tested by the match_domain
3686 condition in an expansion string.
3688 16. Added the ${str2b64: operator.
3690 17. Exim was always calling setrlimit() to set a large limit for the number of
3691 processes, without checking whether the existing limit was already
3692 adequate. (It did check for the limit on file descriptors.) Furthermore,
3693 errors from getrlimit() and setrlimit() were being ignored. Now they are
3694 logged to the main and panic logs, but Exim does carry on, to try to do its
3695 job under whatever limits there are.
3697 18. Imported PCRE 5.0.
3699 19. Trivial typo in log message " temporarily refused connection" (the leading
3702 20. If the log selector return_path_on_delivery was set and an address was
3703 redirected to /dev/null, the delivery process crashed because it assumed
3704 that a return path would always be set for a "successful" delivery. In this
3705 case, the whole delivery is bypassed as an optimization, and therefore no
3708 21. Internal re-arrangement: the function for sending a challenge and reading
3709 a response while authentication was assuming a zero-terminated challenge
3710 string. It's now changed to take a pointer and a length, to allow for
3711 binary data in such strings.
3713 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3715 23. Exim was not respecting finduser_retries when seeking the login of the
3716 uid under which it was called; it was always trying 10 times. (The default
3717 setting of finduser_retries is zero.) Also, it was sleeping after the final
3718 failure, which is pointless.
3720 24. Implemented tls_on_connect_ports.
3722 25. Implemented acl_smtp_predata.
3724 26. If the domain in control=submission is set empty, Exim assumes that the
3725 authenticated id is a complete email address when it generates From: or
3726 Sender: header lines.
3728 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3729 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3730 chown and chgrp in /bin and hostname in /usr/bin.
3732 28. Exim was keeping the "process log" file open after each use, just as it
3733 does for the main log. This opens the possibility of it remaining open for
3734 long periods when the USR1 signal hits a daemon. Occasional processlog
3735 errors were reported, that could have been caused by this. Anyway, it seems
3736 much more sensible not to leave this file open at all, so that is what now
3739 29. The long-running daemon process does not normally write to the log once it
3740 has entered its main loop, and it closes the log before doing so. This is
3741 so that log files can straightforwardly be renamed and moved. However,
3742 there are a couple of unusual error situations where the daemon does write
3743 log entries, and I had neglected to close the log afterwards.
3745 30. The text of an SMTP error response that was received during a remote
3746 delivery was being truncated at 512 bytes. This is too short for some of
3747 the long messages that one sometimes sees. I've increased the limit to
3750 31. It is now possible to make retry rules that apply only when a message has a
3751 specific sender, in particular, an empty sender.
3753 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3754 it possible to be selective about when SMTP synchronization is enforced.
3756 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3758 32. Implemented hosts_connection_nolog.
3760 33. Added an ACL for QUIT.
3762 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3765 35. Added mailbox_size and mailbox_filecount to appendfile.
3767 36. Added control = no_multiline_responses to ACLs.
3769 37. There was a bug in the logic of the code that waits for the clock to tick
3770 in the case where the clock went backwards by a substantial amount such
3771 that the microsecond fraction of "now" was more than the microsecond
3772 fraction of "then" (but the whole seconds number was less).
3774 38. Added support for the libradius Radius client library this is found on
3775 FreeBSD (previously only the radiusclient library was supported).
3781 1. When certain lookups returned multiple values in the form name=value, the
3782 quoting of the values was not always being done properly. Specifically:
3783 (a) If the value started with a double quote, but contained no whitespace,
3785 (b) If the value contained whitespace other than a space character (i.e.
3786 tabs or newlines or carriage returns) it was not quoted.
3787 This fix has been applied to the mysql and pgsql lookups by writing a
3788 separate quoting function and calling it from the lookup code. The fix
3789 should probably also be applied to nisplus, ibase and oracle lookups, but
3790 since I cannot test any of those, I have not disturbed their existing code.
3792 2. A hit in the callout cache for a specific address caused a log line with no
3793 reason for rejecting RCPT. Now it says "Previous (cached) callout
3794 verification failure".
3796 3. There was an off-by-one bug in the queryprogram router. An over-long
3797 return line was truncated at 256 instead of 255 characters, thereby
3798 overflowing its buffer with the terminating zero. As well as fixing this, I
3799 have increased the buffer size to 1024 (and made a note to document this).
3801 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3802 when Exim is waiting for an SMTP response from a remote server, Exim
3803 restarts its select() call on the socket, thereby resetting its timeout.
3804 This is not a problem when such interrupts are rare. Somebody set up a cron
3805 job to run exiwhat every 2 minutes, which is less than the normal select()
3806 timeout (5 or 10 minutes). This meant that the select() timeout never
3807 kicked in because it was always reset. I have fixed this by comparing the
3808 time when an interrupt arrives with the time at the start of the first call
3809 to select(). If more time than the timeout has elapsed, the interrupt is
3810 treated as a timeout.
3812 5. Some internal re-factoring in preparation for the addition of Sieve
3813 extensions (by MH). In particular, the "personal" test is moved to a
3814 separate function, and given an option for scanning Cc: and Bcc: (which is
3815 not set for Exim filters).
3817 6. When Exim created an email address using the login of the caller as the
3818 local part (e.g. when creating a From: or Sender: header line), it was not
3819 quoting the local part when it contained special characters such as @.
3821 7. Installed new OpenBSD configuration files.
3823 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3824 try to make them clearer.
3826 9. Callout options, other than the timeout value, were being ignored when
3827 verifying sender addresses in header lines. For example, when using
3829 verify = header_sender/callout=no_cache
3831 the cache was (incorrectly) being used.
3833 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3834 only the Cygwin environment.
3836 11. When return_path_on_delivery was set as a log selector, if different remote
3837 addresses in the same message used different return paths and parallel
3838 remote delivery occurred, the wrong values would sometimes be logged.
3839 (Whenever a remote delivery process finished, the return path value from
3840 the most recently started remote delivery process was logged.)
3842 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3843 lines when AUTH and/or TLS are in use. This is the "received protocol"
3844 field. Exim used to use "asmtp" for authenticated SMTP, without any
3845 indication (in the protocol name) for TLS use. Now it follows the RFC and
3846 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3847 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3848 names appear in log lines as well as in Received: header lines.
3850 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3851 extensions, and comparison tests, and to fix some bugs.
3853 14. Changes to the "personal" filter test:
3855 (1) The test was buggy in that it was just doing the equivalent of
3856 "contains" tests on header lines. For example, if a user's address was
3857 anne@some.where, the "personal" test would incorrectly be true for
3859 To: susanne@some.where
3861 This test is now done by extracting each address from the header in turn,
3862 and checking the entire address. Other tests that are part of "personal"
3863 are now done using regular expressions (for example, to check local parts
3864 of addresses in From: header lines).
3866 (2) The list of non-personal local parts in From: addresses has been
3867 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3868 taken from the Sieve specification recommendations.
3870 (3) If the message contains any header line starting with "List-" it is
3871 treated as non-personal.
3873 (4) The test for "circular" in the Subject: header line has been removed
3874 because it now seems ill-conceived.
3876 15. Minor typos in src/EDITME comments corrected.
3878 16. Installed latest exipick from John Jetmore.
3880 17. If headers_add on a router specified a text string that was too long for
3881 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3882 of string_sprintf() is now avoided.
3884 18. $message_body_size was not set (it was always zero) when running the DATA
3885 ACL and the local_scan() function.
3887 19. For the "mail" command in an Exim filter, no default was being set for
3888 the once_repeat time, causing a random time value to be used if "once" was
3889 specified. (If the value happened to be <= 0, no repeat happened.) The
3890 default is now 0s, meaning "never repeat". The "vacation" command was OK
3891 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3892 (I found it when inspecting the code).
3894 20. There is now an overall timeout for performing a callout verification. It
3895 defaults to 4 times the callout timeout, which applies to individual SMTP
3896 commands during the callout. The overall timeout applies when there is more
3897 than one host that can be tried. The timeout is checked before trying the
3898 next host. This prevents very long delays if there are a large number of
3899 hosts and all are timing out (e.g. when the network connections are timing
3900 out). The value of the overall timeout can be changed by specifying an
3901 additional sub-option for "callout", called "maxwait". For example:
3903 verify = sender/callout=5s,maxwait=20s
3905 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3906 to the end before writing, but this should make it even safer).
3908 22. Exim was forgetting that it had advertised PIPELINING for the second and
3909 subsequent messages on an SMTP connection. It was also not resetting its
3910 memory on STARTTLS and an internal HELO.
3912 23. When Exim logs an SMTP synchronization error within a session, it now
3913 records whether PIPELINING has been advertised or not.
3915 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3916 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3917 rather than long int.
3919 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3921 26. Added the never_mail option to autoreply.
3927 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3928 crash if the getsockname() call failed; this can happen if a connection is
3929 closed very soon after it is established. The problem was simply in the
3930 order in which certain operations were done, causing Exim to try to write
3931 to the SMTP stream before it had set up the file descriptor. The bug has
3932 been fixed by making things happen in the correct order.
3938 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3939 before the connection was closed, thus losing the rejection response.
3941 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3942 some early Solaris releases, but causes trouble in current releases where
3943 socklen_t is defined.
3945 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3948 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3951 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3952 that releasing the top of it at the end releases what was used for sub-
3953 expansions (unless the block got too big). However, discard this block if
3954 the first thing is a variable or header, so that we can use its block when
3955 it is dynamic (useful for very large $message_headers, for example).
3957 6. Lookups now cache *every* query, not just the most recent. A new, separate
3958 store pool is used for this. It can be recovered when all lookup caches are
3959 flushed. Lookups now release memory at the end of their result strings.
3960 This has involved some general refactoring of the lookup sources.
3962 7. Some code has been added to the store_xxx() functions to reduce the amount
3963 of flapping under certain conditions.
3965 8. log_incoming_interface used to affect only the <= reception log lines. Now
3966 it causes the local interface and port to be added to several more SMTP log
3967 lines, for example "SMTP connection from", and rejection lines.
3969 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3971 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3973 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3974 could be overwritten at the end of the current message (or the start of a
3975 new message if it was set in a HELO ACL). The value is now preserved for
3976 the duration of the SMTP connection.
3978 12. If a transport had a headers_rewrite setting, and a matching header line
3979 contained an unqualified address, that address was qualified, even if it
3980 did not match any rewriting rules. The underlying bug was that the values
3981 of the flags that permit the existence of unqualified sender and recipient
3982 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3983 non-local messages, and by -bnq for local messages) were not being
3984 preserved with the message after it was received.
3986 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3987 "next input=" as part of the text comprising the host identity instead of
3988 the correct text. The code was using the same buffer for two different
3989 strings. However, depending on which order the printing function evaluated
3990 its arguments, the bug did not always show up. Under Linux, for example, my
3991 test suite worked just fine.
3993 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3994 doesn't work with some older versions of Perl. It has been changed to "my",
3995 which in any case is probably the better facility to use.
3997 15. A really picky compiler found some instances of statements for creating
3998 error messages that either had too many or two few arguments for the format
4001 16. The size of the buffer for calls to the DNS resolver has been increased
4002 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4003 for addresses that have a lot of PTR records. This alleviates a problem; it
4004 does not fully solve it.
4006 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4007 buffer now truncates the list and logs the incident, which is the same
4008 action as happens when Exim is looking up a host name and its aliases.
4009 Previously in this situation something unpredictable would happen;
4010 sometimes it was "internal error: store_reset failed".
4012 18. If a server dropped the connection unexpectedly when an Exim client was
4013 using GnuTLS and trying to read a response, the client delivery process
4014 crashed while trying to generate an error log message.
4016 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4017 string, for example:
4019 warn message = H1: something\nH2: something
4021 the text was added as a single header line from Exim's point of view
4022 though it ended up OK in the delivered message. However, searching for the
4023 second and subsequent header lines using $h_h2: did not work. This has been
4024 fixed. Similarly, if a system filter added multiple headers in this way,
4025 the routers could not see them.
4027 20. Expanded the error message when iplsearch is called with an invalid key to
4028 suggest using net-iplsearch in a host list.
4030 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4031 ACLs are no longer actually imposed (and a message to that effect is
4034 22. If a "gecos" field in a passwd entry contained escaped characters, in
4035 particular, if it contained a \" sequence, Exim got it wrong when building
4036 a From: or a Sender: header from that name. A second bug also caused
4037 incorrect handling when an unquoted " was present following a character
4038 that needed quoting.
4040 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4041 was not being matched caselessly.
4043 24. Arranged for all hyphens in the exim.8 source to be escaped with
4046 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4047 properly. Recipient callout cache records were still being keyed to include
4048 the sender, even when use_sender was set false. This led to far more
4049 callouts that were necessary. The sender is no longer included in the key
4050 when use_sender is false.
4052 26. Added "control = submission" modifier to ACLs.
4054 27. Added the ${base62d: operator to decode base 62 numbers.
4056 28. dnsdb lookups can now access SRV records.
4058 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4059 the configuration file.
4061 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4062 (-v) mode. This makes the output for a verbose queue run more intelligible.
4064 31. Added a use_postmaster feature to recipient callouts.
4066 32. Added the $body_zerocount variable, containing the number of binary zero
4067 bytes in the message body.
4069 33. The time of last modification of the "new" subdirectory is now used as the
4070 "mailbox time last read" when there is a quota error for a maildir
4073 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4075 35. Added +ignore_unknown as a special item in host lists.
4077 36. Code for decoding IPv6 addresses in host lists is now included, even if
4078 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4079 address was recognized as an IP address, but was then not correctly decoded
4080 into binary, causing unexpected and incorrect effects when compared with
4087 1. Very minor rewording of debugging text in manualroute to say "list of
4088 hosts" instead of "hostlist".
4090 2. If verify=header_syntax was set, and a header line with an unqualified
4091 address (no domain) and a large number of spaces between the end of the
4092 name and the colon was received, the reception process suffered a buffer
4093 overflow, and (when I tested it) crashed. This was caused by some obsolete
4094 code that should have been removed. The fix is to remove it!
4096 3. When running in the test harness, delay a bit after writing a bounce
4097 message to get a bit more predictability in the log output.
4099 4. Added a call to search_tidyup() just before forking a reception process. In
4100 theory, someone could use a lookup in the expansion of smtp_accept_max_
4101 per_host which, without the tidyup, could leave open a database connection.
4103 5. Added the variables $recipient_data and $sender_data which get set from a
4104 lookup success in an ACL "recipients" or "senders" condition, or a router
4105 "senders" option, similar to $domain_data and $local_part_data.
4107 6. Moved the writing of debug_print from before to after the "senders" test
4110 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4111 problems for message scanning, either using a data ACL, or using
4112 local_scan() because the Received: header was not generated till after they
4113 were called (in order to set the time as the time of reception completion).
4114 I have revised the way this works. The header is now generated after the
4115 body is received, but before the ACL or local_scan() are called. After they
4116 are run, the timestamp in the header is updated.
4122 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4123 before starting a queue runner without re-exec. This happened only when
4124 deliver_drop_privilege was set or when the Exim user was set to root. The
4125 effect of the bug was that timeouts during subsequent deliveries caused
4126 crashes instead of being properly handled. The handler is now left at its
4127 default (and expected) setting.
4129 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4130 message, again when deliver_drop_privilege is set or Exim is run as root.
4131 The bug described in (1) was not present in this case, but the tidying up
4132 of the other signals was missing. I have made the two cases consistent.
4134 3. The ignore_target_hosts setting on a manualroute router was being ignored
4135 for hosts that were looked up using the /MX notation.
4137 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4140 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4141 operated on the sender address. After changing the $sender_address to <>
4142 for the sender address verify, Exim was re-instated it as the original
4143 (before rewriting) address, but remembering that it had rewritten it, so it
4144 wasn't rewriting it again. This bug also had the effect of breaking the
4145 sender address verification caching when the sender address was rewritten.
4147 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4148 This has been changed so that if the ip literal address matches
4149 ignore_target_hosts, the router declines.
4151 7. Added expansion conditions match_domain, match_address, and match_local_
4152 part (NOT match_host).
4154 8. The placeholder for the Received: header didn't have a length field set.
4156 9. Added code to Exim itself and to exim_lock to test for a specific race
4157 condition that could lead to file corruption when using MBX delivery. The
4158 issue is with the lockfile that is created in /tmp. If this file is removed
4159 after a process has opened it but before that process has acquired a lock,
4160 there is the potential for a second process to recreate the file and also
4161 acquire a lock. This could lead to two Exim processes writing to the file
4162 at the same time. The added code performs the same test as UW imapd; it
4163 checks after acquiring the lock that its file descriptor still refers to
4164 the same named file.
4166 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4167 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4170 11. Added the smtp_active_hostname option. If used, this will typically be made
4171 to depend on the incoming interface address. Because $interface_address is
4172 not set up until the daemon has forked a reception process, error responses
4173 that can happen earlier (such as "too many connections") no longer contain
4176 12. If an expansion in a condition on a "warn" statement fails because a lookup
4177 defers, the "warn" statement is abandoned, and the next ACL statement is
4178 processed. Previously this caused the whole ACL to be aborted.
4180 13. Added the iplsearch lookup type.
4182 14. Added ident_timeout as a log selector.
4184 15. Added tls_certificate_verified as a log selector.
4186 16. Added a global option tls_require_ciphers (compare the smtp transport
4187 option of the same name). This controls incoming TLS connections.
4189 17. I finally figured out how to make tls_require_ciphers do a similar thing
4190 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4191 before starting the TLS session.
4193 18. Tabs are now shown as \t in -bP output.
4195 19. If the log selector return_path_on_delivery was set, Exim crashed when
4196 bouncing a message because it had too many Received: header lines.
4198 20. If two routers both had headers_remove settings, and the first one included
4199 a superfluous trailing colon, the final name in the first list and the
4200 first name in the second list were incorrectly joined into one item (with a
4201 colon in the middle).
4207 1. Added -C and -D options to the exinext utility, mainly to make it easier
4208 to include in the automated testing, but these could be helpful when
4209 multiple configurations are in use.
4211 2. The exinext utility was not formatting the output nicely when there was
4212 an alternate port involved in the retry record key, nor when there was a
4213 message id as well (for retries that were specific to a specific message
4214 and a specific host). It was also confused by IPv6 addresses, because of
4215 the additional colons they contain. I have fixed the IPv4 problem, and
4216 patched it up to do a reasonable job for IPv6.
4218 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4219 delivery, the log line now contains "pipelined" if PIPELINING was used.
4221 4. An SMTP transport process used to panic and die if the bind() call to set
4222 an explicit outgoing interface failed. This has been changed; it is now
4223 treated in the same way as a connect() failure.
4225 5. A reference to $sender_host_name in the part of a conditional expansion
4226 that was being skipped was still causing a DNS lookup. This no longer
4229 6. The def: expansion condition was not recognizing references to header lines
4230 that used bh_ and bheader_.
4232 7. Added the _cache feature to named lists.
4234 8. The code for checking quota_filecount in the appendfile transport was
4235 allowing one more file than it should have been.
4237 9. For compatibility with Sendmail, the command line option
4245 and sets the incoming protocol and host name (for trusted callers). The
4246 host name and its colon can be omitted when only the protocol is to be set.
4247 Note the Exim already has two private options, -pd and -ps, that refer to
4248 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4249 "s", but I don't think that's a major issue.
4251 10. A number of refactoring changes to the code, none of which should affect
4254 (a) The number of logging options was getting close to filling up the
4255 32-bit word that was used as a bit map. I have split them into two classes:
4256 those that are passed in the argument to log_write(), and those that are
4257 only ever tested independently outside of that function. These are now in
4258 separate 32-bit words, so there is plenty of room for expansion again.
4259 There is no change in the user interface or the logging behaviour.
4261 (b) When building, for example, log lines, the code previously used a
4262 macro that called string_cat() twice, in order to add two strings. This is
4263 not really sufficiently general. Furthermore, there was one instance where
4264 it was actually wrong because one of the argument was used twice, and in
4265 one call a function was used. (As it happened, calling the function twice
4266 did not affect the overall behaviour.) The macro has been replaced by a
4267 function that can join an arbitrary number of extra strings onto a growing
4270 (c) The code for expansion conditions now uses a table and a binary chop
4271 instead of a serial search (which was left over from when there were very
4272 few conditions). Also, it now recognizes conditions like "pam" even when
4273 the relevant support is not compiled in: a suitably worded error message is
4274 given if an attempt is made to use such a condition.
4276 11. Added ${time_interval:xxxxx}.
4278 12. A bug was causing one of the ddress fields not to be passed back correctly
4279 from remote delivery subprocesses. The field in question was not being
4280 subsequently used, so this caused to problems in practice.
4282 13. Added new log selectors queue_time and deliver_time.
4284 14. Might have fixed a bug in maildirsizefile handling that threw up
4285 "unexpected character" debug warnings, and recalculated the data
4286 unnecessarily. In any case, I expanded the warning message to give more
4289 15. Added the message "Restricted characters in address" to the statements in
4290 the default ACL that block characters like @ and % in local parts.
4292 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4293 Three changes have been made:
4295 (a) There was a serious bug; a negative response to MAIL caused the whole
4296 recipient domain to be cached as invalid, thereby blocking all messages
4297 to all local parts at the same domain, from all senders. This bug has
4298 been fixed. The domain is no longer cached after a negative response to
4299 MAIL if the sender used is not empty.
4301 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4304 (c) A new callout option, "use_sender" has been added for people who want
4305 the modified behaviour.
4311 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4314 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4315 indeed breaks things for older releases.
4317 3. Added additional logging to the case where there is a problem reading data
4318 from a filter that is running in a subprocess using a pipe, in order to
4319 try to track down a specific problem.
4321 4. Testing facility fudge: when running in the test harness and attempting
4322 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4323 getting "No route to host". Convert this to a timeout.
4325 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4328 6. Some OS don't have socklen_t but use size_t instead. This affects the
4329 fifth argument of getsockopt() amongst other things. This is now
4330 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4331 can be set for individual OS. I have set it for SunOS5, OSF1, and
4332 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4333 some earlier ones do not.
4335 7. Change 4.30/15 was not doing the test caselessly.
4337 8. The standard form for an IPv6 address literal was being rejected by address
4338 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4339 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4340 this, as well as the form without the "IPv6" on the front (but only when
4341 address literals are enabled, of course).
4343 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4345 10. Exim crashed if a message with an empty sender address specified by -f
4346 encountered a router with an errors_to setting. This could be provoked only
4347 by a command such as
4351 where an empty string was supplied; "<>" did not hit this bug.
4353 11. Installed PCRE release 4.5.
4355 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4356 remained set. It is now erased.
4358 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4359 times from message ids (which are base 36 rather than the normal 62).
4361 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4362 were being counted as actual protocol errors, and logged if the log
4363 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4364 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4365 and DATA following a set of rejected RCPTs do not count as protocol errors.
4366 In other words, Exim assumes they were pipelined, though this may not
4367 actually be the case. Of course, in all cases the client gets an
4368 appropriate error code.
4370 15. If a lookup fails in an ACL condition, a message about the failure may
4371 be available; it is used if testing the ACL cannot continue, because most
4372 such messages specify what the cause of the deferral is. However, some
4373 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4374 that caused an old message to be retained and used if a later statement
4375 caused a defer, replacing the real cause of the deferral.
4377 16. If an IP address had so many PTR records that the DNS lookup buffer
4378 was not large enough to hold them, Exim could crash while trying to process
4379 the truncated data. It now detects and logs this case.
4381 17. Further to 4.21/58, another change has been made: if (and only if) the
4382 first line of a message (the first header line) ends with CRLF, a bare LF
4383 in a subsequent header line has a space inserted after it, so as not to
4384 terminate the header.
4386 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4387 unnecessarily, used atoi() instead of strtol(), and didn't check the
4388 termination when getting file sizes from file names by regex.
4390 19. Completely re-implemented the support for maildirsize files, in the light
4391 of a number of problems with the previous contributed implementation
4392 (4.30/29). In particular:
4394 . If the quota is zero, the maildirsize file is maintained, but no quota is
4397 . If the maildir directory does not exist, it is created before any attempt
4398 to write a maildirsize file.
4400 . The quota value in the file is just a cache; if the quota is changed in
4401 the transport, the new value overrides.
4403 . A regular expression is available for excluding directories from the
4406 20. The autoreply transport checks the characters in options that define the
4407 message's headers; it allows continued headers, but it was checking with
4408 isspace() after an embedded newline instead of explicitly looking for a
4411 21. If all the "regular" hosts to which an address was routed had passed their
4412 expiry times, and had not reached their retry times, the address was
4413 bounced, even if fallback hosts were defined. Now Exim should go on to try
4416 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4417 equivalent code in the SMTP transport. Some hosts send humungous responses
4418 to HELO/EHLO, more than 1024 it seems.
4420 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4421 gives compiler warnings in some environments. I've now done it "properly",
4424 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4425 (because of problems with the built-in one) was declared to return uschar *
4426 instead of char *, causing compiler failure.
4428 25. Fixed a file descriptor leak when processing alias/forward files.
4430 26. Fixed a minor format string issue in dbfn.c.
4432 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4434 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4435 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4438 29. When a sender address is verified, it is cached, to save repeating the test
4439 when there is more than one recipient in a message. However, when the
4440 verification involves a callout, it is possible for different callout
4441 options to be set for different recipients. It is too complicated to keep
4442 track of this in the cache, so now Exim always runs a verification when a
4443 callout is required, relying on the callout cache for the optimization.
4444 The overhead is duplication of the address routing, but this should not be
4447 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4448 to be verified with callout=postmaster, and the main callout worked but the
4449 postmaster check failed, the verification correctly failed. However, if a
4450 subsequent RCPT command asked for sender verification *without* the
4451 postmaster check, incorrect caching caused this verification also to fail,
4454 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4455 it was not caching the DNS options (qualify_single, search_parents) that
4456 were used when the lookup failed. A subsequent lookup with different
4457 options therefore always gave the same answer, though there were cases
4458 where it should not have. (Example: a "domains = !$mx_any" option on a
4459 dnslookup router: the "domains" option is always processed without any
4460 widening, but the router might have qualify_single set.) Now Exim uses the
4461 cached value only when the same options are set.
4463 32. Added John Jetmore's "exipick" utility to the distribution.
4465 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4466 than a timeout (e.g. a certificate is required, and is not provided), an
4467 Exim server now closes the connection immediately. Previously it waited for
4468 the client to close - but if the client is SSL, it seems that they each
4469 wait for each other, leading to a delay before one of them times out.
4471 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4472 maintained 0.8.x compatibility because I don't think many are using it, and
4473 it is clearly obsolete.
4475 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4478 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4479 client certificate was expired. A simple patch fixes this, though I don't
4480 understand the full logic of why the verify callback is called multiple
4483 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4484 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4485 which causes problems with some clients (such as the Certicom SSL Plus
4486 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4487 disables the coutermeasure allowing Eudora to connect."
4489 38. Exim was not checking that a write() to a log file succeeded. This could
4490 lead to Bad Things if a log got too big, in particular if it hit a file
4491 size limit. Exim now panics and dies if it cannot write to a log file, just
4492 as it does if it cannot open a log file.
4494 39. Modified OS/Makefile-Linux so that it now contains
4496 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4498 The two -D definitions ensure that Exim is compiled with large file
4499 support, which makes it possible to handle log files that are bigger than
4502 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4503 instance) a domain was checked against a named list that involved a lookup,
4504 causing $domain_data to be set, then another domain was checked against the
4505 same list, then the first domain was re-checked, the value of $domain_data
4506 after the final check could be wrong. In particular, if the second check
4507 failed, it could be set empty. This bug probably also applied to
4510 41. The strip_trailing_dot option was not being applied to the address given
4511 with the -f command-line option.
4513 42. The code for reading a message's header from the spool was incrementing
4514 $received_count, but never initializing it. This meant that the value was
4515 incorrect (doubled) while delivering a message in the same process in which
4516 it was received. In the most common configuration of Exim, this never
4517 happens - a fresh exec is done - but it can happen when
4518 deliver_drop_privilege is set.
4520 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4521 it now includes up to 150 characters of the unexpected data in the log
4524 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4525 and building data strings. The size of both of these buffers was 10 000
4526 bytes - far larger than anybody would *ever* want, thought I. Needless to
4527 say, somebody hit the limit. I have increased the maximum line length to
4528 20 000 and the maximum data length of concatenated lines to 100 000. I have
4529 also fixed two bugs, because there was no checking on these buffers. Tsk,
4530 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4531 buffer is too small.
4533 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4534 lsearch lookups. Now it does.
4536 46. When parsing a route_list item in a manualroute router, a fixed-length
4537 buffer was used for the list of hosts. I made this 1024 bytes long,
4538 thinking that nobody would ever have a list of hosts that long. Wrong.
4539 Somebody had a whole pile of complicated expansion conditions, and the
4540 string was silently truncated, leading to an expansion error. It turns out
4541 that it is easier to change to an unlimited length (owing to other changes
4542 that have happened since this code was originally written) than to build
4543 structure for giving a limitation error. The length of the item that
4544 expands into the list of hosts is now unlimited.
4546 47. The lsearch lookup could not handle data where the length of text line was
4547 more than 4095 characters. Such lines were truncated, leading to shortened
4548 data being returned. It should now handle lines of any length.
4550 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4551 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4554 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4555 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4556 no longer happens in comment lines. A list of replacements is now placed
4557 at the head of all of the source files, except those whose only change is
4558 to replace PERL_COMMAND in the very first #! line.
4560 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4561 messages on the queue, with a bottom-up merge sort, using code contributed
4562 by Michael Haardt. This should make operations like -bp somewhat faster on
4563 large queues. It won't affect queue runners, except when queue_run_in_order
4566 51. Installed eximstats 1.31 in the distribution.
4568 52. Added support for SRV lookups to the dnslookup router.
4570 53. If an ACL referred to $message_body or $message_body_end, the value was not
4571 reset for any messages that followed in the same SMTP session.
4573 54. The store-handling optimization for building very long strings was not
4574 differentiating between the different store pools. I don't think this
4575 actually made any difference in practice, but I've tidied it.
4577 55. While running the routers to verify a sender address, $sender_address
4578 was still set to the sender address. This is wrong, because when routing to
4579 send a bounce to the sender, it would be empty. Therefore, I have changed
4580 it so that, while verifying a sender address, $sender_address is set to <>.
4581 (There is no change to what happens when verifying a recipient address.)
4583 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4584 target A or AAAA records (if not already returned) without resetting the
4585 qualify_single or search_parents options of the DNS resolver. These are
4586 inappropriate in this case because the targets of MX and SRV records must
4587 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4588 target that, when qualified, matched something in the local domain. These
4589 two options are now turned off when doing these lookups.
4591 57. It seems that at least some releases of Reiserfs (which does not have the
4592 concept of a fixed number of inodes) returns zero and not -1 for the
4593 number of available inodes. This interacted badly with check_spool_inodes,
4594 which assumed that -1 was the "no such thing" setting. What I have done is
4595 to check that the total number of inodes is greater than zero before doing
4596 the test of how many are available.
4598 58. When a "warn" ACL statement has a log_message modifier, the message is
4599 remembered, and not repeated. This is to avoid a lot of repetition when a
4600 message has many recipients that cause the same warning to be written.
4601 Howewer, Exim was preserving the list of already written lines for an
4602 entire SMTP session, which doesn't seem right. The memory is now reset if a
4603 new message is started.
4605 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4606 debugging output unless log_rewrite was also set.
4608 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4609 of (int)(handle) when we know that handle contains (void *)(-1).
4611 61. The Exim daemon panic-logs an error return when it closes the incoming
4612 connection. However "connection reset by peer" seems to be common, and
4613 isn't really an error worthy of noting specially, so that particular error
4616 62. When Exim is trying to find all the local interfaces, it used to panic and
4617 die if the ioctl to get the interface flags failed. However, it seems that
4618 on at least one OS (Solaris 9) it is possible to have an interface that is
4619 included in the list of interfaces, but for which you get a failure error
4620 for this call. This happens when the interface is not "plumbed" into a
4621 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4622 failure of the "get flags" call assumes that the interface is down.
4624 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4625 makes life easier for people who are doing arithmetic on fields extracted
4626 from dates, where you often get leading zeros that should not be
4627 interpreted as octal.
4629 64. Added qualify_domain to the redirect router, to override the global
4632 65. If a pathologically long header line contained very many addresses (the
4633 report of this problem mentioned 10 000) and each of them was rewritten,
4634 Exim could use up a very large amount of memory. (It kept on making new
4635 copies of the header line as it rewrote, and never released the old ones.)
4636 At the expense of a bit more processing, the header rewriting function has
4637 been changed so that it no longer eats memory in this way.
4639 66. The generation of the Received: header has been moved from the time that a
4640 message starts to be received, to the time that it finishes. The timestamp
4641 in the Received: header should now be very close to that of the <= log
4642 line. There are two side-effects of this change:
4644 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4645 logged header lines no longer include the local Received: line, because
4646 it has not yet been created. The same applies to a copy of the message
4647 that is returned to a non-SMTP sender when a message is rejected.
4649 (b) When a filter file is tested using -bf, no additional Received: header
4650 is added to the test message. After some thought, I decided that this
4653 This change does not affect the value of $received_for. It is still set
4654 after address rewriting, but before local_scan() is called.
4656 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4658 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4659 gave an unhelpful panic error message, and a defer error. I have managed to
4660 change this behaviour so that it now rejects any supplied certificate,
4661 which seems right, as the list of acceptable certificates is empty.
4663 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4664 gave an unhelpful defer error. I have not managed to make this reject any
4665 supplied certificates, but the error message it gives is "no certificate
4666 supplied", which is not helpful.
4668 70. exigrep's output now also includes lines that are not associated with any
4669 message, but which match the given pattern. Implemented by a patch from
4670 Martin Sluka, which also tidied up the Perl a bit.
4672 71. Recipient callout verification, like sender verification, was using <> in
4673 the MAIL FROM command. This isn't really the right thing, since the actual
4674 sender may affect whether the remote host accepts the recipient or not. I
4675 have changed it to use the actual sender in the callout; this means that
4676 the cache record is now keyed on a recipient/sender pair, not just the
4677 recipient address. There doesn't seem to be a real danger of callout loops,
4678 since a callout by the remote host to check the sender would use <>.
4679 [SEE ABOVE: changed after hitting problems.]
4681 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4682 temporary errors. However, in the case of such a code being given after
4683 the end of a data transmission (i.e. after ".") Exim was failing to write
4684 a retry record for the message. (Yes, there was some broken host that was
4685 actually sending 8xx at this point.)
4687 73. An unknown lookup type in a host list could cause Exim to panic-die when
4688 the list was checked. (An example that provoked this was putting <; in the
4689 middle of a list instead of at the start.) If this happened during a DATA
4690 ACL check, a -D file could be left lying around. This kind of configuration
4691 error no longer causes Exim to die; instead it causes a defer errror. The
4692 incident is still logged to the main and panic logs.
4694 74. Buglet left over from Exim 3 conversion. The message "too many messages
4695 in one connection" was written to the rejectlog but not the mainlog, except
4696 when address rewriting (yes!) was being logged.
4698 75. Added write_rejectlog option.
4700 76. When a system filter was run not as root (that is, when system_filter_user
4701 was set), the values of the $n variables were not being returned to the
4702 main process; thus, they were not subsequently available in the $sn
4705 77. Added +return_path_on_delivery log selector.
4707 78. A connection timeout was being treated differently from recipients deferred
4708 when testing hosts_max_try with a message that was older than the host's
4709 retry timeout. (The host should not be counted, thus allowing all hosts to
4710 be tried at least once before bouncing.) This may have been the cause of an
4711 occasionally reported bug whereby a message would remain on the queue
4712 longer than the retry timeout, but would be bounced if a delivery was
4713 forced. I say "may" because I never totally pinned down the problem;
4714 setting up timeout/retry tests is difficult. See also the next item.
4716 79. The ultimate address timeout was not being applied to errors that involved
4717 a combination of host plus message (for example, a timeout on a MAIL
4718 command). When an address resolved to a number of possible hosts, and they
4719 were not all tried for each delivery (e.g. because of hosts_max_try), a
4720 message could remain on the queue longer than the retry timeout.
4722 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4725 81. Fixed an obscure SMTP outgoing bug which required at least the following
4726 conditions: (a) there was another message waiting for the same server;
4727 (b) the server returned 5xx to all RCPT commands in the first message so
4728 that the message was not completed; (c) the server dropped the connection
4729 or gave a negative response to the RSET that Exim sends to abort the
4730 transaction. The observed case was a dropped connection after DATA that had
4731 been sent in pipelining mode. That is, the server had advertised PIPELINING
4732 but was not implementing it correctly. The effect of the bug was incorrect
4733 behaviour, such as trying another host, and this could lead to a crash.
4739 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4740 and daemon.c were passed as pointers to ints; they should have been
4741 pointers to socklen_t variables (which are typically unsigned ints).
4743 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4746 3. Fixed a really odd bug that affected only the testing scheme; patching a
4747 certain fixed string in the binary changed the value of another string that
4748 happened to be identical to the end of the original first string.
4750 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4751 name", it returns that address as the IP address. On some operating
4752 systems (e.g. Solaris), it also passes back the IP address string as the
4753 "host name". However, on others (e.g. Linux), it passes back an empty
4754 string. Exim wasn't checking for this, and was changing the host name to an
4755 empty string, assuming it had been canonicized.
4757 5. Although rare, it is permitted to have more than one PTR record for a given
4758 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4759 all the names associated with an address, because they do in Solaris.
4760 However, it seems that they do not in Linux for data that comes from the
4761 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4762 I found this out when I moved to a new Linux workstation and tried to run
4763 the Exim test suite.
4765 To get round this problem I have changed the code so that it now does its
4766 own call to the DNS to look up PTR records when searching for a host name.
4767 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4768 addresses that are only in /etc/hosts are still found.
4770 This behaviour is, however, controlled by an option called host_lookup_
4771 order, which defaults to "bydns:byaddr". If people want to use the other
4772 order, or indeed, just use one or the other means of lookup, they can
4773 specify it in this variable.
4775 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4776 some operating systems, this comes back from gethostbyaddr() as an empty
4777 string, and this is what Exim used to test for. However, it seems that in
4778 other systems, "." is yielded. Exim now tests for this case too.
4780 7. The values of check_spool_space and check_log_space are now held internally
4781 as a number of kilobytes instead of an absolute number of bytes. If a
4782 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4783 kilobyte. This means that much larger values can be stored.
4785 8. Exim monitor: an attempt to get the action menu when not actually pointing
4786 at a message produces an empty menu entitled "No message selected". This
4787 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4788 no entries in it ("Shell widget menu has zero width and/or height"). So I
4789 have added a single, blank menu entry in this case.
4791 9. Added ${quote_local_part.
4793 10. MIME decoding is now applied to the contents of Subject: header lines when
4796 11. Now that a reference to $sender_host_address automatically causes a reverse
4797 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4798 host lookup before query-style lookups in lists that might use this
4799 variable. This has therefore been abolished, and the "net-" prefix is no
4800 longer necessary for query-style lookups.
4802 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4803 have been a typo for LFLAGS, so it has been changed.
4805 13. The install script calls Exim with "-C /dev/null" in order to find the
4806 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4807 to be output. Howeve, since Exim outputs its version number before the
4808 error, it didn't break the script. It just looked ugly. I fixed this by
4809 always allowing "-C /dev/null" if the caller is root.
4811 14. Ignore overlarge ACL variable number when reading spool file - insurance
4812 against a later release with more variables having written the file.
4814 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4815 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4816 this, as well as the form without the "IPv6" on the front.
4818 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4819 OS/Makefile-Darwin file.
4821 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4822 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4824 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4825 variable. However, some OS use ints for inodes. I've added cast to long int
4826 to get rid of the compiler warning.
4828 19. I had forgotten to lock out "/../" in configuration file names when
4829 ALT_CONFIG_PREFIX was set.
4831 20. Routers used for verification do not need to specify transports. However,
4832 if such a router generated a host list, and callout was configured, Exim
4833 crashed, because it could not find a port number from the (non-existent)
4834 transport. It now assumes port 25 in this circumstance.
4836 21. Added the -t option to exigrep.
4838 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4839 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4840 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4841 them is set, LOOKUP_LSEARCH is forced.
4843 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4845 24. Added sender and host information to the "rejected by local_scan()" log
4846 line; previously there was no indication of these.
4848 25. Added .include_if_exists.
4850 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4851 Linux. It turns out that not all file systems support this. Apparently some
4852 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4853 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4854 not supported on the file descriptor, is now ignored when Exim is trying to
4855 sync a directory. This applies only to Linux.
4857 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4859 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4860 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4863 29. Added support for maildirsize files from supplied patch (modified a bit).
4865 30. The use of :fail: followed by an empty string could lead Exim to respond to
4866 sender verification failures with (e.g.):
4868 550 Verification failed for <xxx>
4869 550 Sender verify failed
4871 where the first response line was missing the '-' that indicates it is not
4872 the final line of the response.
4874 31. The loop for finding the name of the user that called Exim had a hardwired
4875 limit of 10; it now uses the value of finduser_retries, which is used for
4876 all other user lookups.
4878 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4881 33. Exim was neglecting to zero errno before one call of strtol() when
4882 expanding a string and expecting an integer value. On some systems this
4883 resulted in spurious "integer overflow" errors. Also, it was casting the
4884 result into an int without checking.
4886 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4887 did not work. The code looks as if it has *never* worked, though it appears
4888 to have been documented since at least releast 1.62. I have made it work.
4890 35. The "timeout_DNS" error in retry rules, also documented since at least
4891 1.62, also never worked. As it isn't clear exactly what this means, and
4892 clearly it isn't a major issue, I have abolished the feature by treating it
4893 as "timeout", and writing a warning to the main and panic logs.
4895 36. The display of retry rules for -brt wasn't always showing the error code
4898 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4899 timeout_connect_A, timeout_connect_MX.
4901 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4902 to the empty sender.
4904 39. The daemon was not analysing the content of -oX till after it had closed
4905 stderr and disconnected from the controlling terminal. This meant that any
4906 syntax errors were only noted on the panic log, and the return code from
4907 the command was 0. By re-arranging the code a little, I've made the
4908 decoding happen first, so such errors now appear on stderr, and the return
4909 code is 1. However, the actual setting up of the sockets still happens in
4910 the disconnected process, so errors there are still only recorded on the
4913 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4914 connections (as happens on some IP stacks) was logged at start up time as
4915 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4916 it from "IPv6 and IPv4", which means that two separate sockets are being
4919 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4920 says whether AF_INET or AF_INET6 was passed as an argument.
4922 42. Exiwhat output was messed up when time zones were included in log
4925 43. Exiwhat now gives more information about the daemon's listening ports,
4926 and whether -tls-on-connect was used.
4928 44. The "port" option of the smtp transport is now expanded.
4930 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4931 silently ignored. Now an error message is written to the main and panic
4934 46. There's a new ACL modifier called "logwrite" which writes to a log file
4935 as soon as it is encountered.
4937 47. Added $local_user_uid and $local_user_gid at routing time.
4939 48. Exim crashed when trying to verify a sender address that was being
4942 49. Exim was recognizing only a space character after ".include". It now also
4943 recognizes a tab character.
4945 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4946 extracting the relevant information from the specification. The man page no
4947 longer contains scrambled data for the -d option, and I've added a section
4948 at the front about calling Exim under different names.
4950 51. Added "extra_headers" argument to the "mail" command in filter files.
4952 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4955 53. Installed eximstats 1.29.
4957 54. Added transport_filter_timeout as a generic transport option.
4959 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4960 Cc: header lines. This was required by RFC 822, but it not required by RFC
4963 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4964 incoming messages that did not have them. Now it does so only if the
4965 message originates locally, that is, if there is no associated remote host
4966 address. When Resent- header lines are present, this applies to the Resent-
4967 lines rather than the non-Resent- lines.
4969 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4970 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4972 58. Messages for configuration errors now include the name of the main
4973 configuration file - useful now that there may be more than one file in a
4974 list (.included file names were always shown).
4976 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4977 for those rare installations that do not start the daemon as root or run it
4978 setuid root. I've cut out the call to initgroups() if the daemon is not
4981 60. The Exim user and group can now be bound into the binary as text strings
4982 that are looked up at the start of Exim's processing.
4984 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4986 62. Added $mailstore_basename variable.
4988 63. Installed patch to sieve.c from Michael Haardt.
4990 64. When Exim failed to open the panic log after failing to open the main log,
4991 the original message it was trying to log was written to stderr and debug
4992 output, but if they were not available (the usual case in production), it
4993 was lost. Now it is written to syslog before the two lines that record the
4994 failures to open the logs.
4996 65. Users' Exim filters run in subprocesses under the user's uid. It is
4997 possible for a "deliver" command or an alias in a "personal" command to
4998 provoke an address rewrite. If logging of address rewriting is configured,
4999 this fails because the process is not running as root or exim. There may be
5000 a better way of dealing with this, but for the moment (because 4.30 needs
5001 to be released), I have disabled address rewrite logging when running a
5002 filter in a non-root, non-exim process.
5008 1. The buildconfig auxiliary program wasn't quoting the value set for
5009 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5010 not defined. This bug was masked in 4.22 by the effect that was fixed in
5013 2. Some messages that were rejected after a message id was allocated were
5014 shown as "incomplete" by exigrep. It no longer does this for messages that
5015 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5017 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5018 have allow_domain_literals set, the ID did not get logged in the <= line.
5019 Domain literals are now always recognized in Message-ID: header lines.
5021 4. The first argument for a ${extract expansion item is the key name or field
5022 number. Leading and trailing spaces in this item were not being ignored,
5023 causing some misleading effects.
5025 5. When deliver_drop_privilege was set, single queue runner processes started
5026 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5027 same command in the process it spins off) were not dropping privilege.
5029 6. When the daemon running as "exim" started a queue runner, it always
5030 re-executed Exim in the spun-off process. This is a waste of effort when
5031 deliver_drop_privilege is set. The new process now just calls the
5032 queue-runner function directly.
5038 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5041 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5042 ignored. Though the use of -oP was forcing the writing of a pid file, it
5043 was always written to the default place.
5045 3. If the message "no IP address found for host xxxx" is generated during
5046 incoming verification, it is now followed by identification of the incoming
5047 connection (so you can more easily find what provoked it).
5049 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5051 5. Added some features to "harden" Exim a bit more against certain attacks:
5053 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5054 be put in Local/Makefile. This is like the never_users runtime option,
5055 but it cannot be overridden. The default setting is "root".
5057 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5058 prefix string with which any file named in a -C command line option
5061 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5062 is retained for -C and -D only if the caller of Exim is root. Without
5063 it, the exim user may also use -C and -D and retain privilege.
5065 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5066 command line option is disabled.
5068 6. Macro names set by the -D option must start with an upper case letter, just
5069 like macro names defined in the configuration file.
5071 7. Added "dereference=" facility to LDAP.
5073 8. Two instances of the typo "uknown" in the source files are fixed.
5075 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5076 the Configure-Makefile script screwed up while processing it.
5078 10. Incorporated PCRE 4.4.
5080 11. The SMTP synchronization check was not operating right at the start of an
5081 SMTP session. For example, it could not catch a HELO sent before the client
5082 waited for the greeting. There is now a check for outstanding input at the
5083 point when the greeting is written. Because of the duplex, asynchronous
5084 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5085 way, but not yet received, when the check is performed.
5087 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5088 on TCP/IP sockets, because this apparently causes some broken clients to
5091 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5092 unchanged) from the Cygwin maintainer.
5094 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5095 was supported instead of testing for mbx. Effectively a typo.
5097 15. The spa authenticator server code was not checking that the input it
5098 received was valid base64.
5100 16. The debug output line for the "set" modifier in ACLs was not showing the
5101 name of the variable that was being set.
5103 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5105 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5106 lookup on its own. Something else was needed to trigger the lookup. For
5107 example, a match in host_lookup or the need for a host name in a host list.
5108 Now, if $sender_host_name is referenced and the host name has not yet been
5109 looked up, a lookup is performed. If the lookup fails, the variable remains
5110 empty, and $host_lookup_failed is set to "1".
5112 19. Added "eqi" as a case-independent comparison operator.
5114 20. The saslauthd authentication condition could segfault if neither service
5115 nor realm was specified.
5117 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5118 error message that was logged was misleading, and incoming SMTP
5119 connections were dropped. The message is now more accurate, and temporary
5120 errors are given to SMTP connections.
5122 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5123 (except RSET) with a 421 error, until QUIT is received. However, it was
5124 failing to send a response to QUIT.
5126 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5127 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5128 ACL is now run after the helo_try_verify_hosts code.
5130 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5131 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5132 case-independent, so other case variants are also recognized). Apparently
5133 some systems use these upper case variants.
5135 25. If more than two messages were waiting for the same host, and a transport
5136 filter was specified for the transport, Exim sent two messages over the
5137 same TCP/IP connection, and then failed with "socket operation on non-
5138 socket" when it tried to send the third.
5140 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5142 27. The extern definition of crypt16() in expand.c was not being excluded when
5143 the OS had its own crypt16() function.
5145 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5146 as a preferred synonym for return_size_limit, both as an option and as an
5149 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5151 30. Changed the default configuration ACL to relax the local part checking rule
5152 for addresses that are not in any local domains. For these addresses,
5153 slashes and pipe symbols are allowed within local parts, but the sequence
5154 /../ is explicitly forbidden.
5156 31. SPA server authentication was not clearing the challenge buffer before
5159 32. log_message in a "warn" ACL statement was writing to the reject log as
5160 well as to the main log, which contradicts the documentation and doesn't
5161 seem right (because no rejection is happening). So I have stopped it.
5163 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5164 However, I am unable to do any testing of this.
5166 34. Fixed an infelicity in the appendfile transport. When checking directories
5167 for a mailbox, to see if any needed to be created, it was accidentally
5168 using path names with one or more superfluous leading slashes; tracing
5169 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5171 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5172 contents are added to the log line that is written for every discarded
5173 recipient. (Previously a log_message setting was ignored.)
5175 36. The ${quote: operator now quotes the string if it is empty.
5177 37. The install script runs exim in order to find its version number. If for
5178 some reason other than non-existence or emptiness, which it checks, it
5179 could not run './exim', it was installing it with an empty version number,
5180 i.e. as "exim-". This error state is now caught, and the installation is
5183 38. An argument was missing from the function that creates an error message
5184 when Exim fails to connect to the socket for saslauthd authentication.
5185 This could cause Exim to crash, or give a corrupted message.
5187 39. Added isip, isip4, and isip6 to ${if conditions.
5189 40. The ACL variables $acl_xx are now saved with the message, and can be
5190 accessed later in routers, transports, and filters.
5192 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5193 strings in the file are not string-expanded.
5195 42. If a MAIL command specified a SIZE value that was too large to fit into an
5196 int variable, the check against message_size_limit failed. Such values are
5197 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5198 day this will have to be increased, but I don't think I want to be around
5199 when emails are that large.
5206 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5207 iconv() is not standard in FreeBSD.
5209 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5210 IPv6 enabled. The observed symptom was a segmentation fault on return from
5211 the function os_common_find_running_interfaces() in src/os.c.
5213 3. In the check_special_case() function in daemon.c I had used "errno" as an
5214 argument name, which causes warnings on some systems. This was basically a
5215 typo, since it was named "eno" in the comments!
5217 4. The code that waits for the clock to tick (at a resolution of some fraction
5218 of a second) so as to ensure message-id uniqueness was always waiting for
5219 at least one whole tick, when it could have waited for less. [This is
5220 almost certainly not relevant at current processor speeds, where it is
5221 unlikely to ever wait at all. But we try to future-proof.]
5223 5. The function that sleeps for a time interval that includes fractions of a
5224 second contained a race. It did not block SIGALRM between setting the
5225 timer, and suspending (a couple of lines later). If the interval was short
5226 and the sigsuspend() was delayed until after it had expired, the suspension
5227 never ended. On busy systems this could lead to processes getting stuck for
5230 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5231 process, before it forks any delivery processes. The open lookup caching
5232 mechanism meant that the open file or database connection was passed into
5233 the delivery process. The problem was that delivery processes always tidy
5234 up cached lookup data. This could cause a problem for the next delivery
5235 process started by the queue runner, because the external queue runner
5236 process does not know about the closure. So the next delivery process
5237 still has data in the lookup cache. In the case of a file lookup, there was
5238 no problem because closing a file descriptor in a subprocess doesn't affect
5239 the parent. However, if the lookup was caching a connection to a database,
5240 the connection was closed, and the second delivery process was likely to
5241 see errors such as "PGSQL: query failed: server closed the connection
5242 unexpectedly". The problem has been fixed by closing all cached lookups
5243 in a queue runner before running a delivery process.
5245 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5246 seem to have the "const" qualifier which it has on other OS. I've
5249 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5250 *of the same type* (client or server) with the same public name that an
5251 error should be diagnosed.
5253 9. When Exim looked up a host name for an IP address, but failed to find the
5254 original IP address when looking up the host name (a safety check), it
5255 output the message "<ip address> does not match any IP for NULL", which was
5256 confusing, to say the least. The bug was that the host name should have
5257 appeared instead of "NULL".
5259 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5260 user that is built into the binary, and the -C or -D options is used, root
5261 privilege is dropped before the configuration file is read. In addition,
5262 logging is switched to stderr instead of the normal log files. If the
5263 configuration then re-defines the Exim user, the unprivileged environment
5264 is probably not what is expected, so Exim logs a panic warning message (but
5267 However, if deliver_drop_privilege is set, the unprivileged state may well
5268 be exactly what is intended, so the warning has been cut out in that case,
5269 and Exim is allowed to try to write to its normal log files.
5275 1. smtp_return_error_details was not giving details for temporary sender
5276 or receiver verification errors.
5278 2. Diagnose a configuration error if two authenticators have the same public
5281 3. Exim used not to create the message log file for a message until the first
5282 delivery attempt. This could be confusing when incoming messages were held
5283 for policy or load reasons. The message log file is now created at the time
5284 the message is received, and an initial "Received" line is written to it.
5286 4. The automatically generated man page for command line options had a minor
5287 bug that caused no ill effects; however, a more serious problem was that
5288 the procedure for building the man page automatically didn't always
5289 operate. Consequently, release 4.20 contains an out-of-date version. This
5290 shouldn't happen again.
5292 5. When building Exim with embedded Perl support, the script that builds the
5293 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5294 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5296 6. The freeze_tell option was not being used for messages that were frozen on
5297 arrival, either by an ACL or by local_scan().
5299 7. Added the smtp_incomplete_transaction log selector.
5301 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5302 was accepting AUTH without a new EHLO.
5304 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5305 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5308 10. Logging of TCP/IP connections (when configured) now happens in the main
5309 daemon process instead of the child process, so that the TCP/IP connection
5310 count is more accurate (but it can never be perfect).
5312 11. The use of "drop" in a nested ACL was not being handled correctly in the
5313 outer ACL. Now, if condition failure induced by the nested "drop" causes
5314 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5315 or "require"), the connection is dropped.
5317 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5318 that yield "discard" can now be used with an "accept" or a "discard" verb,
5319 but an error is generated for any others (because I can't see a useful way
5320 to define what should happen).
5322 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5323 are now processed in the same way as lines in the Exim configuration file.
5324 In particular, continuation lines are supported.
5326 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5328 15. Added -ti meaning -t -i.
5330 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5331 domains, and warn by logging if others are found.
5333 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5334 returned from GIFCONF when Exim is trying to find the list of interfaces on
5335 a host. The code in os.c has been modified to copy each ifreq to an aligned
5336 structure in all cases.
5338 Also, in some cases, the returned ifreq's were being copied to a 'struct
5339 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5340 means the last couple of bytes of an IPv6 address could be chopped if the
5341 ifreq contained only a normal sockaddr (14 bytes storage).
5343 18. Named domain lists were not supported in the hosts_treat_as_local option.
5344 An entry such as +xxxx was not recognized, and was treated as a literal
5347 19. Ensure that header lines added by a DATA ACL are included in the reject log
5348 if the ACL subsequently rejects the message.
5350 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5351 MD5 (which is deprecated).
5353 21. When testing a filter file using -bf, Exim was writing a message when it
5354 took the sender from a "From " line in the message, but it was not doing so
5355 when it took $return_path from a Return-Path: header line. It now does.
5357 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5358 with a valid header line field name (a series of printing characters
5359 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5361 23. Changed "disc" in the source to "disk" to conform to the documentation and
5362 the book and for uniformity.
5364 24. Ignore Sendmail's -Ooption=value command line item.
5366 25. When execve() failed while trying to run a command in a pipe transport,
5367 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5368 could be confused with a return value of 69 from the command itself. This
5369 has been changed to 127, the value the shell returns if it is asked to run
5370 a non-existent command. The wording for the related log line suggests a
5371 non-existent command as the problem.
5373 26. If received_header_text expands to an empty string, do not add a Received:
5374 header line to the message. (Well, it adds a token one on the spool, but
5375 marks it "old" so that it doesn't get used or transmitted.)
5377 27. Installed eximstats 1.28 (addition of -nt option).
5379 28. There was no check for failure on the call to getsockname() in the daemon
5380 code. This can fail if there is a shortage of resources on the system, with
5381 ENOMEM, for example. A temporary error is now given on failure.
5383 29. Contrary to the C standard, it seems that in some environments, the
5384 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5385 program. Exim now does this explicitly; it affects the formatting of
5386 timestamps using strftime().
5388 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5389 complaints. I've now initialized all the variables, to avoid this.
5391 32. Header lines added by a system filter were not being "seen" during
5392 transport-time rewrites.
5394 33. The info_callback() function passed to OpenSSL is set up with type void
5395 (*)(SSL *, int, int), as described somewhere. However, when calling the
5396 function (actually a macro) that sets it up, the type void(*)() is
5397 expected. I've put in a cast to prevent warnings from picky compilers.
5399 34. If a DNS black list lookup found a CNAME record, but there were no A
5400 records associated with the domain it pointed at, Exim crashed.
5402 35. If a DNS black list lookup returned more than one A record, Exim ignored
5403 all but the first. It now scans all returned addresses if a particular IP
5404 value is being sought. In this situation, the contents of the
5405 $dnslist_value variable are a list of all the addresses, separated by a
5408 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5409 to accept a host name and all its aliases if the forward lookup for any of
5410 them yielded the IP address of the incoming connection. Now it accepts only
5411 those names whose forward lookup yields the correct IP address. Any other
5412 names are discarded. This closes a loophole whereby a rogue DNS
5413 administrator could create reverse DNS records to break through a
5414 wildcarded host restriction in an ACL.
5416 37. If a user filter or a system filter that ran in a subprocess used any of
5417 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5418 the wrong values were passed to the pipe command ($thisaddress had the
5419 value of $0, $0 had the value of $1, etc). This bug was introduced by
5420 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5422 38. Improved the line breaking for long SMTP error messages from ACLs.
5423 Previously, if there was no break point between 40 and 75 characters, Exim
5424 left the rest of the message alone. Two changes have been made: (a) I've
5425 reduced the minimum length to 35 characters; (b) if it can't find a break
5426 point between 35 and 75 characters, it looks ahead and uses the first one
5427 that it finds. This may give the occasional overlong line, but at least the
5428 remaining text gets split now.
5430 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5431 file descriptors might be low, and that setting 1000 would always raise it.
5432 It turns out that in some environments, the limit is already over 1000 and
5433 that lowering it causes trouble. So now Exim takes care not to decrease it.
5435 40. When delivering a message, the value of $return_path is set to $sender_
5436 address at the start of routing (routers may change the value). By an
5437 oversight, this default was not being set up when an address was tested by
5438 -bt or -bv, which affected the outcome if any router or filter referred to
5441 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5442 log only when "message" or "log_message" are set. However, if one of the
5443 conditions was an address verification, or a call to a nested ACL, the
5444 messages generated by the underlying test were being passed through. This
5445 no longer happens. The underlying message is available in $acl_verify_
5446 message for both "message" and "log_message" expansions, so it can be
5447 passed through if needed.
5449 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5450 new expansion $bh_ to give the encoded byte string without charset
5451 translation. Translation happens only if iconv() is available; HAVE_ICONV
5452 indicates this at build time. HEADERS_CHARSET gives the charset to
5453 translate to; headers_charset can change it in the configuration, and
5454 "headers charset" can change it in an individual filter file.
5456 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5457 that creates RFC 2047 encoded "words" labels them as that charset instead
5458 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5459 expansion operator; (ii) when Exim creates a From: line for a local
5460 message; (iii) when a header line is rewritten to include a "phrase" part.
5462 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5463 buggy, causing it to skip the first lines of messages whose message ID
5464 ended in 'D'. This would not have bitten before Exim release 4.14, because
5465 message IDs were unlikely to end in 'D' before then. The effect was to have
5466 incorrect size information for certain domains.
5468 45. #include "config.h" was missing at the start of the crypt16.c module. This
5469 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5472 46. If there was a timeout during a "random" callout check, Exim treated it as
5473 a failure of the random address, and carried on sending RSET and the real
5474 address. If the delay was just some slowness somewhere, the response to the
5475 original RCPT would be taken as a response to RSET and so on, causing
5476 mayhem of various kinds.
5478 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5479 when I implemented it. It didn't allow for the fact that some option values
5480 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5481 the right test for positive values.
5483 48. Domain names in DNS records are case-independent. Exim always looks them up
5484 in lower case. Some resolvers return domain names in exactly the case they
5485 appear in the zone file, that is, they may contain uppercase letters. Not
5486 all resolvers do this - some return always lower case. Exim was treating a
5487 change of case by a resolver as a change of domain, similar to a widening
5488 of a domain abbreviation. This triggered its re-routing code and so it was
5489 trying to route what was effectively the same domain again. This normally
5490 caused routing to fail (because the router wouldn't handle the domain
5491 twice). Now Exim checks for this case specially, and just changes the
5492 casing of the domain that it ultimately uses when it transmits the message
5495 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5498 50. If a filter generated a file delivery with a non-absolute name (possible if
5499 no home directory exists for the router), the forbid_file option was not
5502 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5503 the existing equality matching.
5505 52. Exim was using ints instead of ino_t variables in some places where it was
5506 dealing with inode numbers.
5508 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5509 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5510 called TMPDIR, and if it finds it is different, it changes its value.
5512 54. The smtp_printf() function is now made available to local_scan() so
5513 additional output lines can be written before returning. There is also an
5514 smtp_fflush() function to enable the detection of a dropped connection.
5515 The variables smtp_input and smtp_batched_input are exported to
5518 55. Changed the default runtime configuration: the message "Unknown user"
5519 has been removed from the ACL, and instead placed on the localuser router,
5520 using the cannot_route_message feature. This means that any verification
5521 failures that generate their own messages won't get overridden. Similarly,
5522 the "Unrouteable address" message that was in the ACL for unverifiable
5523 relay addresses has also been removed.
5525 56. Added hosts_avoid_esmtp to the smtp transport.
5527 57. The exicyclog script was not checking for the esoteric option
5528 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5529 will work only if exicyclog is run under the appropriate euid.
5531 58. Following a discussion on the list, the rules by which Exim recognises line
5532 endings on incoming messages have been changed. The -dropcr and drop_cr
5533 options are now no-ops, retained only for backwards compatibility. The
5534 following line terminators are recognized: LF CRLF CR. However, special
5535 processing applies to CR:
5537 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5538 nor a local message in the state where . is a terminator.
5540 (ii) If a bare CR is encountered in a header line, an extra space is added
5541 after the line terminator so as not to end the header. The reasoning
5542 behind this is that bare CRs in header lines are most likely either
5543 to be mistakes, or people trying to play silly games.
5545 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5546 was being incorrectly given as 18 bytes larger than it should have been.
5547 This is a VOB (very old bug).
5549 60. This may never have affected anything current, but just in case it has:
5550 When the local host is found other than at the start of a list of hosts,
5551 the local host, those with the same MX, and any that follow, are discarded.
5552 When the list in question was part of a longer list of hosts, the following
5553 hosts (not currently being processed) were also being discarded. This no
5554 longer happens. I'm not sure if this situation could ever has previously
5557 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5560 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5561 header. This is something that is recommended in a new Internet Draft, and
5562 is something that is documented as being done by Sendmail. There are two
5563 possible values. For messages generated by the autoreply transport, Exim
5566 Auto-Submitted: auto-replied
5568 whereas for all other generated messages (e.g. bounces) it adds
5570 Auto-Submitted: auto-generated
5572 63. The "personal" condition in filters now includes a test for the
5573 Auto-Submitted: header. If it contains the string "auto-" the message it
5574 not considered personal.
5576 64. Added rcpt_include_affixes as a generic transport option.
5578 65. Added queue_only_override (default true).
5580 66. Added the syslog_duplication option.
5582 67. If what should have been the first header line of a message consisted of
5583 a space followed by a colon, Exim was mis-interpreting it as a header line.
5584 It isn't of course - it is syntactically invalid and should therefore be
5585 treated as the start of the message body. The misbehaviour could have
5586 caused a number of strange effects, including loss of data in subsequent
5587 header lines, and spool format errors.
5589 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5590 client host had authenticated. This control can now be exercised by an ACL
5591 for more flexibility.
5593 69. By default, callouts do not happen when testing with -bh. There is now a
5594 variant, -bhc, which does actually run the callout code, including
5595 consulting and updating the callout cache.
5597 70. Added support for saslauthd authentication, courtesy of Alexander
5600 71. If statvfs() failed on the spool or log directories while checking their
5601 size for availability, Exim confusingly gave the error "space shortage".
5602 Furthermore, in debugging mode it crashed with a floating point exception.
5603 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5604 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5605 serious problem, Exim now writes to the main and panic logs when this
5606 happens, with details of the failure. It then refuses to accept the
5607 incoming message, giving the message "spool directory problem" or "log
5608 directory problem" with a 421 code for SMTP messages.
5610 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5611 0, 1, and 2 exist, because some OS complain for execs without them (see
5612 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5613 descriptors. However, the code omitted to check that the open succeeded,
5614 causing mysterious errors if for some reason the permissions on /dev/null
5615 got screwed. Now Exim writes a message to the main and panic logs, and
5616 bombs out if it can't open /dev/null.
5618 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5619 interact so that it is all more flexible. It is supposed to remain
5620 backwards compatible. Also added extra_local_interfaces.
5622 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5623 to bomb out with an assertion failure - to the client this appears as a
5624 connection drop. This problem occurs in the part of the code that was taken
5625 from the Samba project. Fortunately, the assertion is in a very simple
5626 function, so I have fixed this by reproducing the function inline in the
5627 one place where it is called, and arranging for authentication to fail
5628 instead of killing the process with assert().
5630 75. The SPA client code was not working when the server requested OEM rather
5631 than Unicode encoding.
5633 76. Added code to make require_files with a specific uid setting more usable in
5634 the case where statting the file as root fails - usually a non-root-mounted
5635 NFS file system. When this happens and the failure is EACCES, Exim now
5636 forks a subprocess and does the per-uid checking as the relevant uid.
5638 77. Added process_log_path.
5640 78. If log_file_path was not explicitly set, a setting of check_log_space or
5641 check_log_inodes was ignored.
5643 79. If a space check for the spool or log partitions fails, the incident is now
5644 logged. Of course, in the latter case the data may get lost...
5646 80. Added the %p formatting code to string_format() so that it can be used to
5647 print addresses in debug_print(). Adjusted all the address printing in the
5648 debugging in store.c to use %p rather than %d.
5650 81. There was a concern that a line of code in smtp_in.c could overflow a
5651 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5652 initially expressed, the concern was not well-founded, because trailing
5653 spaces are removed early. However, if the trailing spaces were followed by
5654 a NULL, they did not get removed, so the overflow was possible. Two fixes
5657 (a) I re-wrote the offending code in a cleaner fashion.
5658 (b) If an incoming SMTP command contains a NULL character, it is rejected
5661 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5662 runs initgroups(), so that if the Exim user is in any additional groups,
5663 they will be used during message reception.
5669 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob