1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
9 PP/02 Make -n do something, by making it not do something.
10 When combined with -bP, the name of an option is not output.
12 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
15 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
16 $sender_host_name and config options to manage this, and basic check
19 PP/05 DSCP support for outbound connections and control modifier for inbound.
21 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
22 (Only plugin which currently uses this is kerberos4, which nobody should
23 be using, but we should make it available and other future plugins might
24 conceivably use it, even though it would break NAT; stuff *should* be
25 using channel bindings instead).
27 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
28 name; added for Sendmail compatibility; requires admin caller.
29 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
30 just ignore it); requires trusted caller.
31 Also parse but ignore: -Ac -Am -X<logfile>
34 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
36 TL/02 Add +smtp_confirmation as a default logging option.
38 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
39 Patch by Magnus Holmgren from 2007-02-20.
41 TL/04 Bugzilla 1281 - Spec typo.
42 Bugzilla 1283 - Spec typo.
43 Bugzilla 1290 - Spec grammar fixes.
45 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
47 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
49 JH/02 Support "G" suffix to numbers in ${if comparisons.
51 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
53 NM/01 Bugzilla 1197 - Spec typo
54 Bugzilla 1196 - Spec examples corrections
56 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
58 PP/09 Add gnutls_enable_pkcs11 option.
60 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
61 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
63 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
64 "acl {{name}{arg}...}", and optional args on acl condition
67 JH/05 Permit multiple router/transport headers_add/remove lines.
69 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
71 JH/07 Avoid using a waiting database for a single-message-only transport.
72 Performance patch from Paul Fisher. Bugzilla 1262.
74 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
77 JH/09 Add $headers_added variable, with content from use of ACL modifier
78 add_header (but not yet added to the message). Bugzilla 199.
85 PP/01 Handle short writes when writing local log-files.
86 In practice, only affects FreeBSD (8 onwards).
87 Bugzilla 1053, with thanks to Dmitry Isaikin.
89 NM/01 Bugzilla 949 - Documentation tweak
91 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
94 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
96 PP/02 Implemented gsasl authenticator.
98 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
100 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
101 `pkg-config foo` for cflags/libs.
103 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
104 with rest of GSASL and with heimdal_gssapi.
106 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
107 `pkg-config foo` for cflags/libs for the TLS implementation.
109 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
110 properties get this fed in as external SSF. A number of robustness
111 and debugging improvements to the cyrus_sasl authenticator.
113 PP/08 cyrus_sasl server now expands the server_realm option.
115 PP/09 Bugzilla 1214 - Log authentication information in reject log.
116 Patch by Jeremy Harris.
118 PP/10 Added dbmjz lookup type.
120 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
122 PP/12 MAIL args handles TAB as well as SP, for better interop with
123 non-compliant senders.
124 Analysis and variant patch by Todd Lyons.
126 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
127 Bug report from Lars Müller <lars@samba.org> (via SUSE),
128 Patch from Dirk Mueller <dmueller@suse.com>
130 PP/13 tls_peerdn now print-escaped for spool files.
131 Observed some $tls_peerdn in wild which contained \n, which resulted
132 in spool file corruption.
134 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
135 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
136 or write after TLS renegotiation, which otherwise led to messages
139 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
140 as a tracking header (ie: a signed header comes before the signature).
141 Patch from Wolfgang Breyha.
143 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
144 comma-sep list; embedded commas doubled.
146 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
148 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
150 Report and patch from Dmitry Banschikov.
152 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
153 Removed SSL_clear() after SSL_new() which led to protocol negotiation
154 failures. We appear to now support TLS1.1+ with Exim.
156 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
157 lets Exim select keys and certificates based upon TLS SNI from client.
158 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
159 before an outbound SMTP session. New log_selector, +tls_sni.
161 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
162 NULL dereference. Report and patch from Alun Jones.
164 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
165 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
166 Not seeing resolver debug output on NetBSD, but suspect this is a
167 resolver implementation change.
169 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
170 Left warnings. Added "eximon gdb" invocation mode.
172 PP/21 Defaulting "accept_8bitmime" to true, not false.
174 PP/22 Added -bw for inetd wait mode support.
176 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
177 locate the relevant includes and libraries. Made this the default.
179 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
180 Bugzilla 1246, report and most of solution from Tomasz Kusy.
182 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
183 This may cause build issues on older platforms.
185 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
186 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
187 gnutls_require_mac & gnutls_require_protocols (no longer supported).
188 Added SNI support via GnuTLS too.
189 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
191 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
193 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
194 Applied second patch from Janne, implementing suggestion to default
195 multiple-strings-in-record handling to match SPF spec.
197 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
199 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
200 read-only, out of scope).
201 Patch from Wolfgang Breyha, report from Stuart Northfield.
203 PP/29 Fix three issues highlighted by clang analyser static analysis.
204 Only crash-plausible issue would require the Cambridge-specific
205 iplookup router and a misconfiguration.
206 Report from Marcin Mirosław.
208 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
210 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
211 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
212 As part of this, removing so much warning spew let me fix some minor
213 real issues in debug logging.
215 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
216 assignment on my part. Fixed.
218 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
219 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
220 Janne Snabb (who went above and beyond: thank you).
222 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
223 string otherwise requires a connection and a bunch more work and it's
224 relatively easy to get wrong. Should also expose TLS library linkage
227 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
228 64-bit ${eval} (JH/03).
230 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
231 GNU libc to support some of the 64-bit stuff, should not lead to
232 conflicts. Defined before os.h is pulled in, so if a given platform
233 needs to override this, it can.
235 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
236 protection layer was required, which is not implemented.
237 Bugzilla 1254, patch from Wolfgang Breyha.
239 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
240 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
241 tls_dhparam take prime identifiers. Also unbreak combination of
242 OpenSSL+DH_params+TLSSNI.
244 PP/39 Disable SSLv2 by default in OpenSSL support.
250 PP/01 Solaris build fix for Oracle's LDAP libraries.
251 Bugzilla 1109, patch from Stephen Usher.
253 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
255 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
258 TF/02 Fix a couple more cases where we did not log the error message
259 when unlink() failed. See also change 4.74-TF/03.
261 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
262 lock up or crash if it happened to be inside a call to libc when it
263 got a SIGUSR1 from exiwhat.
265 The SIGUSR1 handler appends the current process status to the process
266 log which is later printed by exiwhat. It used to use the general
267 purpose logging code to do this, but several functions it calls are
268 not safe for signals.
270 The new output code in the SIGUSR1 handler is specific to the process
271 log, and simple enough that it's easy to inspect for signal safety.
272 Removing some special cases also simplifies the general logging code.
273 Removing the spurious timestamps from the process log simplifies
276 TF/04 Improved ratelimit ACL condition.
278 The /noupdate option has been deprecated in favour of /readonly which
279 has clearer semantics. The /leaky, /strict, and /readonly update modes
280 are mutually exclusive. The update mode is no longer included in the
281 database key; it just determines when the database is updated. (This
282 means that when you upgrde Exim will forget old rate measurements.)
284 Exim now checks that the per_* options are used with an update mode that
285 makes sense for the current ACL. For example, when Exim is processing a
286 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
287 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
288 must specify per_mail/readonly. If you omit the update mode it defaults to
289 /leaky where that makes sense (as before) or /readonly where required.
291 The /noupdate option is now undocumented but still supported for
292 backwards compatibility. It is equivalent to /readonly except that in
293 ACLs where /readonly is required you may specify /leaky/noupdate or
294 /strict/noupdate which are treated the same as /readonly.
296 A useful new feature is the /count= option. This is a generalization
297 of the per_byte option, so that you can measure the throughput of other
298 aggregate values. For example, the per_byte option is now equivalent
299 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
301 The per_rcpt option has been generalized using the /count= mechanism
302 (though it's more complicated than the per_byte equivalence). When it is
303 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
304 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
305 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
306 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
307 Note that using per_rcpt with a non-readonly update mode in more than
308 one ACL will cause the recipients to be double-counted. (The per_mail
309 and per_byte options don't have this problem.)
311 The handling of very low rates has changed slightly. If the computed rate
312 is less than the event's count (usually one) then this event is the first
313 after a long gap. In this case the rate is set to the same as this event's
314 count, so that the first message of a spam run is counted properly.
316 The major new feature is a mechanism for counting the rate of unique
317 events. The new per_addr option counts the number of different
318 recipients that someone has sent messages to in the last time period. It
319 behaves like per_rcpt if all the recipient addresses are different, but
320 duplicate recipient addresses do not increase the measured rate. Like
321 the /count= option this is a general mechanism, so the per_addr option
322 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
323 example, measure the rate that a client uses different sender addresses
324 with the options per_mail/unique=$sender_address. There are further
325 details in the main documentation.
327 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
329 TF/06 Removed a few PCRE remnants.
331 TF/07 Automatically extract Exim's version number from tags in the git
332 repository when doing development or release builds.
334 PP/02 Raise smtp_cmd_buffer_size to 16kB.
335 Bugzilla 879. Patch from Paul Fisher.
337 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
338 Heavily based on revision 40f9a89a from Simon Arlott's tree.
341 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
343 PP/05 Variable $av_failed, true if the AV scanner deferred.
344 Bugzilla 1078. Patch from John Horne.
346 PP/06 Stop make process more reliably on build failure.
347 Bugzilla 1087. Patch from Heiko Schlittermann.
349 PP/07 Make maildir_use_size_file an _expandable_ boolean.
350 Bugzilla 1089. Patch from Heiko Schlittermann.
352 PP/08 Handle ${run} returning more data than OS pipe buffer size.
353 Bugzilla 1131. Patch from Holger Weiß.
355 PP/09 Handle IPv6 addresses with SPF.
356 Bugzilla 860. Patch from Wolfgang Breyha.
358 PP/10 GnuTLS: support TLS 1.2 & 1.1.
360 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
363 PP/11 match_* no longer expand right-hand-side by default.
364 New compile-time build option, EXPAND_LISTMATCH_RHS.
365 New expansion conditions, "inlist", "inlisti".
367 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
369 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
371 PP/14 fix log_write() format string regression from TF/03.
372 Bugzilla 1152. Patch from Dmitry Isaikin.
378 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
380 PP/02 Harmonised TLS library version reporting; only show if debugging.
381 Layout now matches that introduced for other libraries in 4.74 PP/03.
383 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
385 PP/04 New "dns_use_edns0" global option.
387 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
390 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
391 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
393 TK/01 Updated PolarSSL code to 0.14.2.
394 Bugzilla 1097. Patch from Andreas Metzler.
396 PP/07 Catch divide-by-zero in ${eval:...}.
399 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
402 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
403 format-string attack -- SECURITY: remote arbitrary code execution.
405 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
406 time unintentionally subject to list matching rules, letting the header
407 cause arbitrary Exim lookups (of items which can occur in lists, *not*
408 arbitrary string expansion). This allowed for information disclosure.
410 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
411 INT_MIN/-1 -- value coerced to INT_MAX.
417 NM/01 Workround for PCRE version dependency in version reporting
420 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
421 This fixes portability to compilers other than gcc, notably
422 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
424 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
425 makefiles for portability to HP-UX and POSIX correctness.
427 PP/01 Permit LOOKUP_foo enabling on the make command-line.
428 Also via indented variable definition in the Makefile.
429 (Debugging by Oliver Heesakkers).
431 PP/02 Restore caching of spamd results with expanded spamd_address.
432 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
434 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
435 Improves build reliability. Fix from: Frank Elsner
437 NM/02 Fix wide character breakage in the rfc2047 coding
438 Fixes bug 1064. Patch from Andrey N. Oktyabrski
440 NM/03 Allow underscore in dnslist lookups
441 Fixes bug 1026. Patch from Graeme Fowler
443 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
444 Code patches from Adam Ciarcinski of NetBSD.
446 NM/04 Fixed exiqgrep to cope with mailq missing size issue
449 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
450 is logged, to avoid truncation. Patch from John Horne.
452 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
453 Patch from Jakob Hirsch.
455 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
456 SQL string expansion failure details.
457 Patch from Andrey Oktyabrski.
459 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
460 Patch from Simon Arlott.
462 PP/09 New lookups functionality failed to compile on old gcc which rejects
463 extern declarations in function scope.
464 Patch from Oliver Fleischmann
466 PP/10 Use sig_atomic_t for flags set from signal handlers.
467 Check getgroups() return and improve debugging.
468 Fixed developed for diagnosis in bug 927 (which turned out to be
471 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
472 Patch from Mark Zealey.
474 PP/12 Bugzilla 1056: Improved spamd server selection.
475 Patch from Mark Zealey.
477 PP/13 Bugzilla 1086: Deal with maildir quota file races.
478 Based on patch from Heiko Schlittermann.
480 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
481 Patch from Uwe Doering, sign-off by Michael Haardt.
483 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
484 variable declaration deep within a block. Bug and patch from
487 PP/15 lookups-Makefile IRIX compatibilty coercion.
489 PP/16 Make DISABLE_DKIM build knob functional.
491 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
492 Patch by Simon Arlott
494 TF/03 Fix valgrind.h portability to C89 compilers that do not support
495 variable argument macros. Our copy now differs from upstream.
501 TF/01 Failure to get a lock on a hints database can have serious
502 consequences so log it to the panic log.
504 TF/02 Log LMTP confirmation messages in the same way as SMTP,
505 controlled using the smtp_confirmation log selector.
507 TF/03 Include the error message when we fail to unlink a spool file.
509 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
510 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
511 for maintaining out-of-tree patches for some time.
513 PP/01 Bugzilla 139: Documentation and portability issues.
514 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
515 Handle per-OS dynamic-module compilation flags.
517 PP/02 Let /dev/null have normal permissions.
518 The 4.73 fixes were a little too stringent and complained about the
519 permissions on /dev/null. Exempt it from some checks.
520 Reported by Andreas M. Kirchwitz.
522 PP/03 Report version information for many libraries, including
523 Exim version information for dynamically loaded libraries. Created
524 version.h, now support a version extension string for distributors
525 who patch heavily. Dynamic module ABI change.
527 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
528 privilege escalation vulnerability whereby the Exim run-time user
529 can cause root to append content of the attacker's choosing to
532 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
535 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
536 If dropping privileges for untrusted macros, we disabled normal logging
537 on the basis that it would fail; for the Exim run-time user, this is not
538 the case, and it resulted in successful deliveries going unlogged.
539 Fixed. Reported by Andreas Metzler.
545 PP/01 Date: & Message-Id: revert to normally being appended to a message,
546 only prepend for the Resent-* case. Fixes regression introduced in
547 Exim 4.70 by NM/22 for Bugzilla 607.
549 PP/02 Include check_rfc2047_length in configure.default because we're seeing
550 increasing numbers of administrators be bitten by this.
552 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
554 PP/03 Bugzilla 994: added openssl_options main configuration option.
556 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
558 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
560 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
562 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
563 without a peer certificate, leading to a segfault because of an
564 assumption that peers always have certificates. Be a little more
565 paranoid. Problem reported by Martin Tscholak.
567 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
568 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
569 NB: ClamAV planning to remove STREAM in "middle of 2010".
570 CL also introduces -bmalware, various -d+acl logging additions and
571 more caution in buffer sizes.
573 PP/09 Implemented reverse_ip expansion operator.
575 PP/10 Bugzilla 937: provide a "debug" ACL control.
577 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
579 PP/12 Bugzilla 973: Implement --version.
581 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
583 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
585 PP/15 Bugzilla 816: support multiple condition rules on Routers.
587 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
588 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
589 ignore trailing whitespace.
591 JJ/02 prevent non-panic DKIM error from being sent to paniclog
593 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
596 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
597 Notification from Dr Andrew Aitchison.
599 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
600 ExtendedDetectionInfo response format.
601 Notification from John Horne.
603 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
606 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
607 XSL and documented dependency on system catalogs, with examples of how
610 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
613 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
614 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
615 configuration file which is writeable by the Exim user or group.
617 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
618 of configuration files to cover files specified with the -C option if
619 they are going to be used with root privileges, not just the default
622 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
623 option (effectively making it always true).
625 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
626 files to be used while preserving root privileges.
628 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
629 that rogue child processes cannot use them.
631 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
632 run-time user, instead of root.
634 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
635 Exim run-time user without dropping privileges.
637 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
638 result string, instead of calling string_vformat() twice with the same
641 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
642 for other users. Others should always drop root privileges if they use
643 -C on the command line, even for a whitelisted configure file.
645 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
647 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
653 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
654 $data_path, and $header_path variables; fixed documentation bugs and
657 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
658 exipick to access non-standard spools, including the "frozen" queue
661 NM/01 Bugzilla 965: Support mysql stored procedures.
662 Patch from Alain Williams
664 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
666 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
667 Patch from Andreas Metzler
669 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
670 Patch from Kirill Miazine
672 NM/05 Bugzilla 671: Added umask to procmail example.
674 JJ/03 installed exipick 20100323.0, fixing doc bug
676 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
677 directory. Notification and patch from Dan Rosenberg.
679 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
681 TK/02 Improve log output when DKIM signing operation fails.
683 MH/01 Treat the transport option dkim_domain as a colon separated
684 list, not as a single string, and sign the message with each element,
685 omitting multiple occurences of the same signer.
687 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
688 Bugzilla 985, 986. Patch by Simon Arlott
690 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
691 Patch by Simon Arlott
693 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
694 MBX locking. Notification from Dan Rosenberg.
700 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
702 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
704 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
706 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
708 NM/04 Bugzilla 915: Flag broken perl installation during build.
714 TK/01 Added patch by Johannes Berg that expands the main option
715 "spamd_address" if it starts with a dollar sign.
717 TK/02 Write list of recipients to X-Envelope-Sender header when building
718 the mbox-format spool file for content scanning (suggested by Jakob
721 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
722 (http://www.dcc-servers.net/) support via dccifd. Activated by
723 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
725 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
726 by Mark Daniel Reidel <mr@df.eu>.
728 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
729 When building exim an external PCRE library is now needed -
730 PCRE is a system library on the majority of modern systems.
731 See entry on PCRE_LIBS in EDITME file.
733 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
734 conversation. Added nologin parameter to request.
735 Patch contributed by Kirill Miazine.
737 TF/01 Do not log submission mode rewrites if they do not change the address.
739 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
741 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
742 log files in place. Contributed by Roberto Lima.
744 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
746 TF/03 Bugzilla 615: When checking the local_parts router precondition
747 after a local_part_suffix or local_part_prefix option, Exim now
748 does not use the address's named list lookup cache, since this
749 contains cached lookups for the whole local part.
751 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
752 Robert Millan. Documentation is in experimental-spec.txt.
754 TF/04 Bugzilla 668: Fix parallel build (make -j).
756 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
758 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
759 Patch provided by Jan Srzednicki.
761 TF/05 Leading white space used to be stripped from $spam_report which
762 wrecked the formatting. Now it is preserved.
764 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
765 that they are available at delivery time.
767 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
769 TF/08 TLS error reporting now respects the incoming_interface and
770 incoming_port log selectors.
772 TF/09 Produce a more useful error message if an SMTP transport's hosts
773 setting expands to an empty string.
775 NM/06 Bugzilla 744: EXPN did not work under TLS.
776 Patch provided by Phil Pennock.
778 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
779 Patch provided by Richard Godbee.
781 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
782 acl_smtp_notquit, added index entry.
784 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
785 Patch provided by Eugene Bujak.
787 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
788 accept(). Patch provided by Maxim Dounin.
790 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
791 Patch provided by Phil Pennock.
793 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
795 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
796 Patch provided by Brad "anomie" Jorsch.
798 NM/14 Bugzilla 622: Added timeout setting to transport filter.
799 Patch provided by Dean Brooks.
801 TK/05 Add native DKIM support (does not depend on external libraries).
803 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
804 Patch provided by Graeme Fowler.
806 NM/16 Bugzilla 851: Documentation example syntax fix.
808 NM/17 Changed NOTICE file to remove references to embedded PCRE.
810 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
813 NM/19 Bugzilla 745: TLS version reporting.
814 Patch provided by Phil Pennock.
816 NM/20 Bugzilla 167: bool: condition support.
817 Patch provided by Phil Pennock.
819 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
820 clients. Patch provided by Phil Pennock.
822 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
823 Patch provided by Brad "anomie" Jorsch.
825 NM/23 Bugzilla 687: Fix misparses in eximstats.
826 Patch provided by Heiko Schlittermann.
828 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
829 Patch provided by Heiko Schlittermann.
831 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
832 plus update to original patch.
834 NM/26 Bugzilla 799: Documentation correction for ratelimit.
836 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
837 Patch provided by David Brownlee.
839 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
841 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
843 NM/30 Bugzilla 888: TLS documentation bugfixes.
845 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
847 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
848 Unlike the original bugzilla I have changed all shell scripts in src tree.
850 NM/33 Bugzilla 898: Transport filter timeout fix.
851 Patch by Todd Rinaldo.
853 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
854 Patch by Serge Demonchaux.
856 NM/35 Bugzilla 39: Base64 decode bug fixes.
857 Patch by Jakob Hirsch.
859 NM/36 Bugzilla 909: Correct connect() call in dcc code.
861 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
863 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
865 NM/39 Bugzilla 911: Fixed MakeLinks build script.
871 TK/01 Add preliminary DKIM support. Currently requires a forked version of
872 ALT-N's libdkim that I have put here:
873 http://duncanthrax.net/exim-experimental/
875 Note to Michael Haardt: I had to rename some vars in sieve.c. They
876 were called 'true' and it seems that C99 defines that as a reserved
877 keyword to be used with 'bool' variable types. That means you could
878 not include C99-style headers which use bools without triggering
879 build errors in sieve.c.
881 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
882 as mailq or other aliases. Changed the --help handling significantly
883 to do whats expected. exim_usage() emits usage/help information.
885 SC/01 Added the -bylocaldomain option to eximstats.
887 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
889 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
891 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
897 PH/01 Another patch from the Sieve maintainer.
899 PH/02 When an IPv6 address is converted to a string for single-key lookup
900 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
901 dots are used instead of colons so that keys in lsearch files need not
902 contain colons. This was done some time before quoting was made available
903 in lsearch files. However, iplsearch files do require colons in IPv6 keys
904 (notated using the quote facility) so as to distinguish them from IPv4
905 keys. This meant that lookups for IP addresses in host lists did not work
906 for iplsearch lookups.
908 This has been fixed by arranging for IPv6 addresses to be expressed with
909 colons if the lookup type is iplsearch. This is not incompatible, because
910 previously such lookups could never work.
912 The situation is now rather anomolous, since one *can* have colons in
913 ordinary lsearch keys. However, making the change in all cases is
914 incompatible and would probably break a number of configurations.
916 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
919 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
920 conversion specification without a maximum field width, thereby enabling
921 a rogue spamd server to cause a buffer overflow. While nobody in their
922 right mind would setup Exim to query an untrusted spamd server, an
923 attacker that gains access to a server running spamd could potentially
924 exploit this vulnerability to run arbitrary code as the Exim user.
926 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
927 $primary_hostname instead of what libspf2 thinks the hosts name is.
929 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
930 a directory entry by the name of the lookup key. Previously, if a
931 symlink pointed to a non-existing file or a file in a directory that
932 Exim lacked permissions to read, a lookup for a key matching that
933 symlink would fail. Now it is enough that a matching directory entry
934 exists, symlink or not. (Bugzilla 503.)
936 PH/03 The body_linecount and body_zerocount variables are now exported in the
939 PH/04 Added the $dnslist_matched variable.
941 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
942 This means they are set thereafter only if the connection becomes
945 PH/06 Added the client_condition to authenticators so that some can be skipped
946 by clients under certain conditions.
948 PH/07 The error message for a badly-placed control=no_multiline_responses left
949 "_responses" off the end of the name.
951 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
953 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
954 (without spaces) instead of just copying the configuration text.
956 PH/10 Added the /noupdate option to the ratelimit ACL condition.
958 PH/11 Added $max_received_linelength.
960 PH/12 Added +ignore_defer and +include_defer to host lists.
962 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
963 way in which PCRE > 7.0 is built.
965 PH/14 Implemented queue_only_load_latch.
967 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
968 MAIL command. The effect was to mangle the value on 64-bit systems.
970 PH/16 Another patch from the Sieve maintainer.
972 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
974 PH/18 If a system quota error occurred while trying to create the file for
975 a maildir delivery, the message "Mailbox is full" was not appended to the
976 bounce if the delivery eventually timed out. Change 4.67/27 below applied
977 only to a quota excession during the actual writing of the file.
979 PH/19 It seems that peer DN values may contain newlines (and other non-printing
980 characters?) which causes problems in log lines. The DN values are now
981 passed through string_printing() before being added to log lines.
983 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
984 and InterBase are left for another time.)
986 PH/21 Added message_body_newlines option.
988 PH/22 Guard against possible overflow in moan_check_errorcopy().
990 PH/23 POSIX allows open() to be a macro; guard against that.
992 PH/24 If the recipient of an error message contained an @ in the local part
993 (suitably quoted, of course), incorrect values were put in $domain and
994 $local_part during the evaluation of errors_copy.
1000 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1001 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1004 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1005 issue a MAIL command.
1007 PH/02 In an ACL statement such as
1009 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1011 if a client was not listed at all, or was listed with a value other than
1012 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1013 the condition was not true (as it should be), so access was not denied.
1014 The bug was that the ! inversion was incorrectly passed on to the second
1015 item. This has been fixed.
1017 PH/03 Added additional dnslists conditions == and =& which are different from
1018 = and & when the dns lookup returns more than one IP address.
1020 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1021 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1023 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1024 FSYNC, which compiles an option called disable_fsync that allows for
1025 bypassing fsync(). The documentation is heavily laced with warnings.
1027 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1029 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1030 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1031 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1032 including adding "make clean"; (3) Added -fPIC when compiling the test
1033 dynamically loaded module, to get rid of a warning.
1035 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1036 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1037 = 0s. The bug is otherwise harmless.
1039 PH/07 There was a bug in the dovecot authenticator such that the value of
1040 $auth1 could be overwritten, and so not correctly preserved, after a
1041 successful authentication. This usually meant that the value preserved by
1042 the server_setid option was incorrect.
1044 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1046 PH/09 Installed PCRE release 7.0.
1048 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1049 run for batched SMTP input. It is now run at the start of every message
1050 in the batch. While fixing this I discovered that the process information
1051 (output by running exiwhat) was not always getting set for -bs and -bS
1052 input. This is fixed, and it now also says "batched" for BSMTP.
1054 PH/11 Added control=no_pipelining.
1056 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1057 patch, slightly modified), and move the expansion of helo_data till after
1058 the connection is made in the smtp transport (so it can use these
1061 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1063 PH/14 Added log_selector = +pid.
1065 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1067 PH/16 Add ${if forany and ${if forall.
1069 PH/17 Added dsn_from option to vary the From: line in DSNs.
1071 PH/18 Flush SMTP output before performing a callout, unless control =
1072 no_callout_flush is set.
1074 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1075 was true (the default) a successful delivery failed to delete the retry
1076 item, thus causing premature timeout of the address. The bug is now
1079 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1081 PH/21 Long custom messages for fakedefer and fakereject are now split up
1082 into multiline reponses in the same way that messages for "deny" and
1083 other ACL rejections are.
1085 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1086 with slight modification.
1088 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1089 draft, changing the syntax and factoring some duplicate code".
1091 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1092 for deliveries of the second and subsequent messages over the same SMTP
1095 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1096 ${reduce, with only minor "tidies".
1098 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1100 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1101 expansion side effects.
1103 PH/27 When a message times out after an over-quota error from an Exim-imposed
1104 quota, the bounce message says "mailbox is full". This message was not
1105 being given when it was a system quota that was exceeded. It now should
1108 MH/03 Made $recipients available in local_scan(). local_scan() already has
1109 better access to the recipient list through recipients_list[], but
1110 $recipients can be useful in postmaster-provided expansion strings.
1112 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1113 in the case of a MAIL command with additional options following the
1114 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1115 were accidentally chopped off.
1117 PH/29 SMTP synchronization checks are implemented when a command is read -
1118 there is a check that no more input is waiting when there shouldn't be
1119 any. However, for some commands, a delay in an ACL can mean that it is
1120 some time before the response is written. In this time, more input might
1121 arrive, invalidly. So now there are extra checks after an ACL has run for
1122 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1123 pipelining has not been advertised.
1125 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1127 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1128 returned in the SMTP response when smtp_return_error_details was false.
1129 This has been fixed.
1131 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1132 instead of the C I/O that was originally supplied, because problems were
1133 reported on Solaris.
1135 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1136 Exim which did not show up earlier: it was assuming that a call to
1137 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1138 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1139 was a macro that became an assignment, so it seemed to work. This has
1140 changed to a proper function call with a void return, hence the compile
1141 error. Exim's code has been fixed.
1143 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1146 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1148 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1150 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1151 because it turns out to be too big or there is a timeout) there is no
1152 "Completed" line in the log. When some messages of this type were
1153 selected by exigrep, they were listed as "not completed". Others were
1154 picked up by some special patterns. I have improved the selection
1155 criteria to be more general.
1157 PH/38 The host_find_failed option in the manualroute router can now be set
1158 to "ignore", to completely ignore a host whose IP address cannot be
1159 found. If all hosts are ignored, the behaviour is controlled by the new
1160 host_all_ignored option.
1162 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1163 homing or because of multiple MX records with /mx) generated more than
1164 one IP address, and the following item turned out to be the local host,
1165 all the secondary addresses of the first item were incorrectly removed
1166 from the list, along with the local host and any following hosts (which
1167 is what is supposed to happen).
1169 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1170 whoever called Exim into the -H file. In the case of the daemon it was
1171 behaving confusingly. When first started, it used values for whoever
1172 started the daemon, but after a SIGHUP it used the Exim user (because it
1173 calls itself on a restart). I have changed the code so that it now always
1176 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1177 message are rejected with the same error (e.g. no authentication or bad
1178 sender address), and a DATA command is nevertheless sent (as can happen
1179 with PIPELINING or a stupid MUA), the error message that was given to the
1180 RCPT commands is included in the rejection of the DATA command. This is
1181 intended to be helpful for MUAs that show only the final error to their
1184 PH/42 Another patch from the Sieve maintainer.
1186 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1187 Eximstats - Fixed some broken HTML links and added missing column headers
1189 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1190 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1192 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1194 PH/43 Yet another patch from the Sieve maintainer.
1196 PH/44 I found a way to check for a TCP/IP connection going away before sending
1197 the response to the final '.' that terminates a message, but only in the
1198 case where the client has not sent further data following the '.'
1199 (unfortunately, this is allowed). However, in many cases there won't be
1200 any further data because there won't be any more messages to send. A call
1201 to select() can be used: if it shows that the input is "ready", there is
1202 either input waiting, or the socket has been closed. An attempt to read
1203 the next input character can distinguish the two cases. Previously, Exim
1204 would have sent an OK response which the client would never have see.
1205 This could lead to message repetition. This fix should cure that, at
1206 least in a lot of common cases.
1208 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1209 advertised in response to EHLO.
1215 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1216 fixed by 4.65/MH/01 (is this a record?) are fixed:
1218 (i) An empty string was always treated as zero by the numeric comparison
1219 operators. This behaviour has been restored.
1221 (ii) It is documented that the numeric comparison operators always treat
1222 their arguments as decimal numbers. This was broken in that numbers
1223 starting with 0 were being interpreted as octal.
1225 While fixing these problems I realized that there was another issue that
1226 hadn't been noticed. Values of message_size_limit (both the global option
1227 and the transport option) were treated as octal if they started with 0.
1228 The documentation was vague. These values are now always treated as
1229 decimal, and I will make that clear in the documentation.
1235 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1236 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1239 MH/01 Don't check that the operands of numeric comparison operators are
1240 integers when their expansion is in "skipping" mode (fixes bug
1241 introduced by 4.64-PH/07).
1243 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1244 child addresses, Exim now panics and dies. Previously, because the count
1245 is held in a short int, deliveries were likely to be lost. As such a
1246 large number of recipients for a single message is ridiculous
1247 (performance will be very, very poor), I have chosen to impose a limit
1248 rather than extend the field.
1254 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1255 leftover -K file (the existence of which was triggered by #402).
1256 While we were at it, introduced process PID as part of the -K
1257 filename. This should rule out race conditions when creating
1260 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1261 processing considerably. Previous code took too long for large mails,
1262 triggering a timeout which in turn triggers #401.
1264 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1265 in the DK code in transports.c. sendfile() is not really portable,
1266 hence the _LINUX specificness.
1268 TF/01 In the add_headers option to the mail command in an Exim filter,
1269 there was a bug that Exim would claim a syntax error in any
1270 header after the first one which had an odd number of characters
1273 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1274 callout verification, Exim cached a "reject" for the entire domain. This
1275 is correct for most verifications, but it is not correct for a recipient
1276 verification with use_sender or use_postmaster set, because in that case
1277 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1278 case of MAIL FROM:<> rejection from other early rejections (e.g.
1279 rejection of HELO). When verifying a recipient using a non-null MAIL
1280 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1281 Whatever the result of the callout, the value of the domain cache is
1282 left unchanged (for any other kind of callout, getting as far as trying
1283 RCPT means that the domain itself is ok).
1285 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1288 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1289 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1290 session, the daemon ignores ECONNECT errors and logs others; it now
1291 ignores EPIPE as well.
1293 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1294 (quoted-printable decoding).
1296 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1297 later the small subsequent patch to fix an introduced bug.
1299 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1301 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1303 PH/08 An error is now given if message_size_limit is specified negative.
1305 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1306 to be given (somewhat) arbitrary names.
1308 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1311 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1312 miscellaneous code fixes
1314 PH/10 Added the log_reject_target ACL modifier to specify where to log
1317 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1318 hostname. This is wrong, because it relates to the incoming message (and
1319 probably the interface on which it is arriving) and not to the outgoing
1320 callout (which could be using a different interface). This has been
1321 changed to use the value of the helo_data option from the smtp transport
1322 instead - this is what is used when a message is actually being sent. If
1323 there is no remote transport (possible with a router that sets up host
1324 addresses), $smtp_active_hostname is used.
1326 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1327 tweaks were necessary in order to get it to work (see also 21 below):
1328 (a) The code assumed that strncpy() returns a negative number on buffer
1329 overflow, which isn't the case. Replaced with Exim's string_format()
1331 (b) There were several signed/unsigned issues. I just did the minimum
1332 hacking in of casts. There is scope for a larger refactoring.
1333 (c) The code used strcasecmp() which is not a standard C function.
1334 Replaced with Exim's strcmpic() function.
1335 (d) The code set only $1; it now sets $auth1 as well.
1336 (e) A simple test gave the error "authentication client didn't specify
1337 service in request". It would seem that Dovecot has changed its
1338 interface. Fortunately there's a specification; I followed it and
1339 changed what the client sends and it appears to be working now.
1341 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1344 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1345 address A is aliased to B and C, where B exists and C does not. Without
1346 -v the output is "A verified" because verification stops after a
1347 successful redirection if more than one address is generated. However,
1348 with -v the child addresses are also verified. Exim was outputting "A
1349 failed to verify" and then showing the successful verification for C,
1350 with its parentage. It now outputs "B failed to verify", showing B's
1351 parentage before showing the successful verification of C.
1353 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1354 look up a TXT record in a specific list after matching in a combined
1357 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1358 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1359 they consult the DNS. I had assumed they would set it the way they
1360 wanted; and indeed my experiments on Linux seem to show that in some
1361 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1362 To be on the safe side, however, I have now made the interface to
1363 host_find_byname() similar to host_find_bydns(), with an argument
1364 containing the DNS resolver options. The host_find_byname() function now
1365 sets these options at its start, just as host_find_bydns() does. The smtp
1366 transport options dns_qualify_single and dns_search_parents are passed to
1367 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1368 of host_find_byname() use the default settings of RES_DEFNAMES
1369 (qualify_single) but not RES_DNSRCH (search_parents).
1371 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1372 spool_read_header() do less string testing, by means of a preliminary
1373 switch on the second character of optional "-foo" lines. (This is
1374 overdue, caused by the large number of possibilities that now exist.
1375 Originally there were few.) While I was there, I also converted the
1376 str(n)cmp tests so they don't re-test the leading "-" and the first
1377 character, in the hope this might squeeze out yet more improvement.
1379 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1380 flag allowing group syntax was set by the header_syntax check but not
1381 turned off, possible causing trouble later; (2) The flag was not being
1382 set at all for the header_verify test, causing "group"-style headers to
1383 be rejected. I have now set it in this case, and also caused header_
1384 verify to ignore an empty address taken from a group. While doing this, I
1385 came across some other cases where the code for allowing group syntax
1386 while scanning a header line wasn't quite right (mostly, not resetting
1387 the flag correctly in the right place). These bugs could have caused
1388 trouble for malformed header lines. I hope it is now all correct.
1390 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1391 with the "reply" argument non-NULL. The code, however (which originally
1392 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1393 but it didn't always do it. This confused somebody who was copying the
1394 code for some other use. I have removed all the tests.
1396 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1397 feature that was used to support insecure browsers during the U.S. crypto
1398 embargo. It requires special client support, and Exim is probably the
1399 only MTA that supported it -- and would never use it because real RSA is
1400 always available. This code has been removed, because it had the bad
1401 effect of slowing Exim down by computing (never used) parameters for the
1402 RSA_EXPORT functionality.
1404 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1405 authenticator to fail if there's a tab character in the incoming data
1406 (there should never be unless someone is messing about, as it's supposed
1407 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1408 if the connection is using TLS or if the remote IP is the same as the
1409 local IP, and the "valid-client-cert option" if a client certificate has
1412 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1413 authenticators. This can be used for authorization after authentication
1414 succeeds. (In the case of plaintext, it servers for both authentication
1417 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1418 if any retry times were supplied.
1420 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1421 connection, where there is no client IP address to check. In this
1422 situation, the verify now always succeeds.
1424 PH/25 Applied John Jetmore's -Mset patch.
1426 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1428 PH/27 In a string expansion for a processed (not raw) header when multiple
1429 headers of the same name were present, leading whitespace was being
1430 removed from all of them, but trailing whitespace was being removed only
1431 from the last one. Now trailing whitespace is removed from each header
1432 before concatenation. Completely empty headers in a concatenation (as
1433 before) are ignored.
1435 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1436 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1438 PH/29 [Removed. This was a change that I later backed out, and forgot to
1439 correct the ChangeLog entry (that I had efficiently created) before
1440 committing the later change.]
1442 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1443 address errors (4xx response to RCPT) over the same connection as other
1444 messages routed to the same hosts. Such deliveries are always "forced",
1445 so retry times are not inspected. This resulted in far too many retries
1446 for the affected addresses. The effect occurred only when there were more
1447 hosts than the hosts_max_try setting in the smtp transport when it had
1448 the 4xx errors. Those hosts that it had tried were not added to the list
1449 of hosts for which the message was waiting, so if all were tried, there
1450 was no problem. Two fixes have been applied:
1452 (i) If there are any address or message errors in an SMTP delivery, none
1453 of the hosts (tried or untried) are now added to the list of hosts
1454 for which the message is waiting, so the message should not be a
1455 candidate for sending over the same connection that was used for a
1456 successful delivery of some other message. This seems entirely
1457 reasonable: after all the message is NOT "waiting for some host".
1458 This is so "obvious" that I'm not sure why it wasn't done
1459 previously. Hope I haven't missed anything, but it can't do any
1460 harm, as the worst effect is to miss an optimization.
1462 (ii) If, despite (i), such a delivery is accidentally attempted, the
1463 routing retry time is respected, so at least it doesn't keep
1464 hammering the server.
1466 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1467 in ${readsocket because some servers need this prod.
1469 PH/32 Added some extra debug output when updating a wait-xxx database.
1471 PH/33 The hint "could be header name not terminated by colon", which has been
1472 given for certain expansion errors for a long time, was not being given
1473 for the ${if def:h_colon_omitted{... case.
1475 PH/34 The spec says: "With one important exception, whenever a domain list is
1476 being scanned, $domain contains the subject domain." There was at least
1477 one case where this was not true.
1479 PH/35 The error "getsockname() failed: connection reset by peer" was being
1480 written to the panic log as well as the main log, but it isn't really
1481 panic-worthy as it just means the connection died rather early on. I have
1482 removed the panic log writing for the ECONNRESET error when getsockname()
1485 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1486 runs only) independently of the message's sender address. This meant
1487 that, if the 4xx error was in fact related to the sender, a different
1488 message to the same recipient with a different sender could confuse
1489 things. In particualar, this can happen when sending to a greylisting
1490 server, but other circumstances could also provoke similar problems.
1491 I have changed the default so that the retry time for these errors is now
1492 based a combination of the sender and recipient addresses. This change
1493 can be overridden by setting address_retry_include_sender=false in the
1496 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1497 remote server are returned as part of bounce messages. This was not
1498 happening for LMTP over a pipe (the lmtp transport), but now it is the
1499 same for both kinds of LMTP.
1501 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1502 in header lines that were in fact CNAMEs. This is no longer the case.
1504 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1505 and queue runs started by the daemon processed all messages. This has
1506 been fixed so that -R and -S can now usefully be given with -q<time>.
1508 PH/40 Import PCRE release 6.7 (fixes some bugs).
1510 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1512 PH/42 Give an error if -q is specified more than once.
1514 PH/43 Renamed the variables $interface_address and $interface_port as
1515 $received_ip_address and $received_port, to make it clear that these
1516 values apply to message reception, and not to the outgoing interface when
1517 a message is delivered. (The old names remain recognized, of course.)
1519 PH/44 There was no timeout on the connect() call when using a Unix domain
1520 socket in the ${readsocket expansion. There now is.
1522 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1523 be meaningful with "accept".
1525 SC/01 Eximstats V1.43
1526 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1528 SC/02 Eximstats V1.44
1529 Use a glob alias rather than an array ref in the generated
1530 parser. This improves both readability and performance.
1532 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1533 Collect SpamAssassin and rejection statistics.
1534 Don't display local sender or destination tables unless
1535 there is data to show.
1536 Added average volumes into the top table text output.
1538 SC/04 Eximstats V1.46
1539 Collect data on the number of addresses (recipients)
1540 as well as the number of messages.
1542 SC/05 Eximstats V1.47
1543 Added 'Message too big' to the list of mail rejection
1544 reasons (thanks to Marco Gaiarin).
1546 SC/06 Eximstats V1.48
1547 Mainlog lines which have GMT offsets and are too short to
1548 have a flag are now skipped.
1550 SC/07 Eximstats V1.49 (Alain Williams)
1551 Added the -emptyok flag.
1553 SC/08 Eximstats V1.50
1554 Fixes for obtaining the IP address from reject messages.
1556 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1557 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1558 whitesspace changes from 4.64-PH/27
1560 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1563 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1564 are found, allow negative numbers in numeric criteria)
1566 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1568 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1569 to match changes made in 4.64-PH/43
1571 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1573 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1574 "domain" is actually an IP address, and force a failure. This locks out
1575 those revolvers/nameservers that support "A-for-A" lookups, in
1576 contravention of the specifications.
1578 PH/48 When a host name was looked up from an IP address, and the subsequent
1579 forward lookup of the name timed out, the host name was left in
1580 $sender_host_name, contrary to the specification.
1582 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1583 restricted to single-key lookups, Exim was not diagnosing an error if
1584 * or *@ was used with a query-style lookup.
1586 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1588 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1589 long ago, but noone interested enough thought of it. Let's just say that
1590 the "1.1" means that there are some new functions that weren't there at
1591 some point in the past.
1593 PH/51 Error processing for expansion failure of helo_data from an smtp
1594 transport during callout processing was broken.
1596 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1597 tested/used via the -bh/-bhc/-bs options.
1599 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1600 bug, fixed in subsequent PCRE releases).
1602 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1603 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1605 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1611 SC/01 Use a glob alias rather than an array ref in eximstats generated
1612 parser. This improves both readability and performance.
1614 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1615 Don't display local sender or destination tables in eximstats unless
1616 there is data to show.
1617 Added average volumes into the eximstats top table text output.
1619 SC/03 Collect data on the number of addresses (recipients) as well
1620 as the number of messages in eximstats.
1622 TF/01 Correct an error in the documentation for the redirect router. Exim
1623 does (usually) call initgroups() when daemonizing.
1625 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1626 with consistent privilege compared to when running as a daemon.
1628 TF/03 Note in the spec that $authenticated_id is not set for local
1629 submissions from trusted users.
1631 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1632 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1634 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1635 by adding some example configuration directives to the default
1636 configuration file. A little bit of work is required to uncomment the
1637 directives and define how usernames and passwords are checked, but
1638 there is now a framework to start from.
1640 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1641 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1642 without this. I don't know how relevant this is to other LDAP libraries.
1644 PH/02 Add the verb name to the "unknown ACL verb" error.
1646 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1648 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1650 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1651 directory not expanded when it should be if an expanded home directory
1652 was set for the address (which is overridden by the transport).
1654 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1657 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1658 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1659 because it is too late at that time, and has no effect.
1661 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1662 security issue with \' (bugzilla #107). I could not use the
1663 PQescapeStringConn() function, because it needs a PGconn value as one of
1666 PH/08 When testing addresses using -bt, indicate those final addresses that
1667 are duplicates that would not cause an additional delivery. At least one
1668 person was confused, thinking that -bt output corresponded to deliveries.
1669 (Suppressing duplicates isn't a good idea as you lose the information
1670 about possibly different redirections that led to the duplicates.)
1672 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1673 systems where poll() doesn't work, in particular OS X.
1675 PH/10 Added more information to debugging output for retry time not reached.
1677 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1678 operations in malware.c.
1680 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1683 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1684 syslog_duplication set false, log lines that would normally be written
1685 both the the main log and to the reject log were not written to syslog at
1688 PH/14 In the default configuration, change the use of "message" in ACL warn
1689 statements to "add_header".
1691 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1692 not followed by a command (e.g. "seen endif").
1694 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1695 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1698 PH/17 Added extra conditions to the default value of delay_warning_condition
1702 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1703 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1704 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1707 The Auto-Submitted: and various List- headers are standardised, whereas I
1708 don't think Precedence: ever was.
1710 PH/18 Refactored debugging code in route_finduser() to show more information,
1711 in particular, the error code if getpwnam() issues one.
1713 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1714 This is apparently needed in addition to the PH/07 change above to avoid
1715 any possible encoding problems.
1717 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1718 but not after initializing Perl.
1720 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1721 output them only if debugging. By default they are written stderr,
1722 apparently, which is not desirable.
1724 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1727 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1730 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1732 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1733 authenticated or an ident call has been made. Suppress the default
1734 values for $authenticated_id and $authenticated_sender (but permit -oMai
1735 and -oMas) when testing with -bh.
1737 PH/24 Re-jigged the order of the tests in the default configuration so that the
1738 tests for valid domains and recipients precede the DNS black list and CSA
1739 tests, on the grounds that those ones are more expensive.
1741 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1742 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1743 This bug exists in every version of Exim that I still have, right back to
1746 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1747 However, an attempt to turn on case-sensitivity in a regex key by
1748 including (?-i) didn't work because the subject string was already
1749 lowercased, and the effects were non-intuitive. It turns out that a
1750 one-line patch can be used to allow (?-i) to work as expected.
1756 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1757 other effects) broke the use of negated acl sub-conditions.
1759 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1762 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1763 "Deny" causes Exim to reject the incoming connection with a 554 error.
1764 Unfortunately, if there is a major crisis, such as a disk failure,
1765 tcp-wrappers gives "deny", whereas what one would like would be some
1766 kind of temporary error. A kludge has been added to help with this.
1767 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1768 554 error is used if errno is still zero or contains ENOENT (which occurs
1769 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1772 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1774 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1775 errors. Otherwise a message that provokes a temporary error (when other
1776 messages do not) can cause a whole host to time out.
1778 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1779 addresses were routed directly to files or pipes from a redirect router.
1780 File deliveries just didn't batch; pipe deliveries might have suffered
1783 PH/06 A failure to get a lock for a hints database would erroneously always say
1784 "Failed to get write lock", even when it was really a read lock.
1786 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1787 of 0600. This has been changed to use the value of the lockfile_mode
1788 option (which defaults to 0600).
1790 PH/08 Applied small patch from the Sieve maintainer.
1792 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1793 folder from quota calculations, a direct delivery into this folder messed
1794 up the contents of the maildirsize file. This was because the regex was
1795 used only to exclude .Trash (or whatever) when the size of the mailbox
1796 was calculated. There was no check that a delivery was happening into an
1797 excluded directory. This bug has been fixed by ignoring all quota
1798 processing for deliveries into excluded directories.
1800 PH/10 Added the maildirfolder_create_regex option to appendfile.
1806 PH/01 The code for finding all the local interface addresses on a FreeBSD
1807 system running IPv6 was broken. This may well have applied to all BSD
1808 systems, as well as to others that have similar system calls. The broken
1809 code found IPv4 interfaces correctly, but gave incorrect values for the
1810 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1811 that it would not match correctly against @[] and not recognize the IPv6
1814 PH/02 The ipliteral router was not recognizing addresses of the form user@
1815 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1817 PH/03 Added disable_ipv6.
1819 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1820 decoded form, because it is most often used to construct To: headers
1821 lines in autoreplies, and the decoded form may well be syntactically
1822 invalid. However, $reply_address has leading white space removed, and all
1823 newlines turned into spaces so that the autoreply transport does not
1826 PH/05 If group was specified without a user on a router, and no group or user
1827 was specified on a transport, the group from the router was ignored.
1829 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1830 for visible compile-time settings that can be used to change these
1831 numbers, for those that want even more. Backwards compatibility with old
1832 spool files has been maintained. However, going back to a previous Exim
1833 release will lost any variables that are in spool files.
1835 PH/07 Two small changes when running in the test harness: increase delay when
1836 passing a TCP/IP connection to a new process, in case the original
1837 process has to generate a bounce, and remove special handling of
1838 127.0.0.2 (sic), which is no longer necessary.
1840 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1841 be the same on different OS.
1843 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1846 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1847 whether --show-vars was specified or not
1849 JJ/02 exipick: Added support for new ACL variable spool format introduced
1852 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1853 syntactically invalid From: or Reply-to: line, and a filter used this to
1854 generate an autoreply, and therefore failed to obtain an address for the
1855 autoreply, Exim could try to deliver to a non-existent relative file
1856 name, causing unrelated and misleading errors. What now happens is that
1857 it logs this as a hard delivery error, but does not attempt to create a
1860 PH/11 The exinext utility has a -C option for testing purposes, but although
1861 the given file was scanned by exinext itself; it wasn't being passed on
1862 when Exim was called.
1864 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1865 an end-of-file indication when reading a command response.
1867 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1868 compiled. In many other places in Exim, IPv6 addresses are always
1869 recognized, so I have changed this. It also means that IPv4 domain
1870 literals of the form [IPV4:n.n.n.n] are now always recognized.
1872 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1873 used if the router is not running as root, for example, when verifying at
1874 ACL time, or when using -bh. The debugging output from this situation was
1875 non-existent - all you got was a failure to exec. I have made two
1878 (a) Failures to set uid/gid, the current directory, or a process leader
1879 in a subprocess such as that created by queryprogram now generate
1880 suitable debugging ouput when -d is set.
1882 (b) The queryprogram router detects when it is not running as root,
1883 outputs suitable debugging information if -d is set, and then runs
1884 the subprocess without attempting to change uid/gid.
1886 PH/15 Minor change to Makefile for building test_host (undocumented testing
1889 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1890 additional section of a DNS packet that returns MX or SRV records.
1891 Instead, it always explicitly searches for A/AAAA records. This avoids
1892 major problems that occur when a DNS server includes only records of one
1893 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1894 fixed another bug: if SRV records were looked up and the corresponding
1895 address records were *not* found in the additional section, the port
1896 values from the SRV records were lost.
1898 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1899 using the correct key (the original address) when searching the retry
1900 rules in order to find which one to use for generating the retry hint.
1902 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1903 adding the default one. Similarly, if it contains a Reply-To: header, the
1904 errors_reply_to option, if set, is not used.
1906 PH/19 When calculating a retry time, Exim used to measure the "time since
1907 failure" by looking at the "first failed" field in the retry record. Now
1908 it does not use this if it is later than than the arrival time of the
1909 message. Instead it uses the arrival time. This makes for better
1910 behaviour in cases where some deliveries succeed, thus re-setting the
1911 "first failed" field. An example is a quota failure for a huge message
1912 when small messages continue to be delivered. Without this change, the
1913 "time since failure" will always be short, possible causing more frequent
1914 delivery attempts for the huge message than are intended.
1915 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1917 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1918 $1, $2, $3) because the numerical variables can be reset during some
1919 expansion items (e.g. "match"), thereby losing the authentication data.
1921 PH/21 Make -bV show the size of off_t variables so that the test suite can
1922 decide whether to run tests for quotas > 2G.
1924 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1925 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1926 filecount value is greater than 2G or if a quota value is greater than 2G
1927 on a system where the size of off_t is not greater than 4, a panic error
1930 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1931 never match. The debug and -bh output now contains an explicit error
1932 message indicating a malformed IPv4 address or mask.
1934 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1935 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1936 PH/23 above applies.
1938 PH/25 Do not write to syslog when running in the test harness. The only
1939 occasion when this arises is a failure to open the main or panic logs
1940 (for which there is an explicit test).
1942 PH/26 Added the /no_tell option to "control=freeze".
1944 PH/27 If a host name lookup failed very early in a connection, for example, if
1945 the IP address matched host_lookup and the reverse lookup yielded a name
1946 that did not have a forward lookup, an error message of the form "no IP
1947 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
1948 could be logged. Now it outputs the IP address instead of "NULL".
1950 PH/28 An enabling patch from MH: add new function child_open_exim2() which
1951 allows the sender and the authenticated sender to be set when
1952 submitting a message from within Exim. Since child_open_exim() is
1953 documented for local_scan(), the new function should be too.
1955 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1956 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1957 results in an empty string is now treated as unset.
1959 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1961 PH/31 Added sender_verify_fail logging option.
1963 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1964 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1965 tidied the source and removed it altogether.
1967 PH/33 When a queue run was abandoned because the load average was too high, a
1968 log line was always written; now it is written only if the queue_run log
1969 selector is set. In addition, the log line for abandonment now contains
1970 information about the queue run such as the pid. This is always present
1971 in "start" and "stop" lines but was omitted from the "abandon" line.
1973 PH/34 Omit spaces between a header name and the colon in the error message that
1974 is given when verify = headers_syntax fails (if there are lots of them,
1975 the message gets confusing).
1977 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1978 names, as there are now some PTR records that contain slashes. This check
1979 is only to protect against broken name servers that fall over on strange
1980 characters, so the fact that it applies to all lookups doesn't matter.
1982 PH/36 Now that the new test suite is complete, we can remove some of the
1983 special code in Exim that was needed for the old test suite. For example,
1984 sorting DNS records because real resolvers return them in an arbitrary
1985 order. The new test suite's fake resolver always returns records in the
1988 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1989 bounces) except when queue_only is set, to avoid logging races between
1990 the different processes.
1992 PH/38 Panic-die if .include specifies a non-absolute path.
1994 PH/39 A tweak to the "H" retry rule from its user.
1996 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1997 a label. They prevented compilation on older perls.
1999 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2000 a warning to be raised on newish perls.
2002 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2003 on queue. Changes to match documented behaviour of showing count of
2004 messages matching specified criteria.
2006 PH/40 Changed the default ident timeout from 30s to 5s.
2008 PH/41 Added support for the use of login_cap features, on those BSD systems
2009 that have them, for controlling the resources used by pipe deliveries.
2011 PH/42 The content-scanning code uses fopen() to create files in which to put
2012 message data. Previously it was not paying any attention to the mode of
2013 the files. Exim runs with umask(0) because the rest of the code creates
2014 files with open(), and sets the required mode explicitly. Thus, these
2015 files were ending up world-writeable. This was not a big issue, because,
2016 being within the spool directory, they were not world-accessible. I have
2017 created a function called modefopen, which takes an additional mode
2018 argument. It sets umask(777), creates the file, chmods it to the required
2019 mode, then resets the umask. All the relevant calls to fopen() in the
2020 content scanning code have been changed to use this function.
2022 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2023 to 24 hours. This avoids potential overflow problems when processing G
2024 and H retry rules. I suspect nobody ever tinkers with this value.
2026 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2028 PH/45 When the plaintext authenticator is running as a client, the server's
2029 challenges are checked to ensure they are valid base64 strings. By
2030 default, the authentication attempt is cancelled if an invalid string is
2031 received. Setting client_ignore_invalid_base64 true ignores these errors.
2032 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2033 they are received. Thus, the responses can be made to depend on the
2034 challenges. If an invalid string is ignored, an empty string is placed in
2037 PH/46 Messages that are created by the autoreply transport now contains a
2038 References: header, in accordance with RFCs 2822 and 3834.
2040 PH/47 Added authenticated_sender_force to the smtp transport.
2042 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2044 PH/49 Installed latest patch from the Sieve maintainer.
2046 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2047 was also set, the appendfile transport was unnecessarily scanning a
2048 directory of message files (e.g. for maildir delivery) to find the count
2049 of files (along with the size), even though it did not need this
2050 information. It now does the scan only if it needs to find either the
2051 size of the count of files.
2053 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2055 PH/52 Two bugs concerned with error handling when the smtp transport is
2058 (i) Exim was not creating retry information for temporary errors given
2059 for individual recipients after the DATA command when the smtp transport
2060 was used in LMTP mode. This meant that they could be retried too
2061 frequently, and not timed out correctly.
2063 (ii) Exim was setting the flag that allows error details to be returned
2064 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2065 recipients that were returned after the DATA command.
2067 PH/53 This is related to PH/52, but is more general: for any failing address,
2068 when detailed error information was permitted to be returned to the
2069 sender, but the error was temporary, then after the final timeout, only
2070 "retry timeout exceeded" was returned. Now it returns the full error as
2071 well as "retry timeout exceeded".
2073 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2074 do this, and (what is worse) MTAs that accept it.
2076 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2077 will now be deprecated.
2079 PH/56 New os.c-cygwin from the Cygwin maintainer.
2081 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2082 formats (previously only available in exim formats via -bpr, -bpru,
2083 and -bpra. Now also available in native and exiqgrep formats)
2085 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2086 with very large, slow to parse queues
2088 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2090 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2092 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2093 responses to authentication challenges, though it was showing the
2094 challenges; (ii) I've removed the CR characters from the debug output for
2097 PH/58 Allow for the insertion of a newline as well as a space when a string
2098 is turned into more than one encoded-word during RFC 2047 encoding. The
2099 Sieve code now uses this.
2101 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2102 data_4xx, lost_connection, tls_required.
2104 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2105 message was being sent as an SMTP response.
2107 PH/61 Add -l and -k options to exicyclog.
2109 PH/62 When verifying, if an address was redirected to one new address, so that
2110 verification continued, and the new address failed or deferred after
2111 having set something in $address_data, the value of $address_data was not
2112 passed back to the ACL. This was different to the case when no
2113 redirection occurred. The value is now passed back in both cases.
2115 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2116 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2117 use login_cap.h, so on its own it isn't the distinguishing feature. The
2118 new name refers directly to the setclassresources() function.
2120 PH/65 Added configuration files for NetBSD3.
2122 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2124 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2125 is preferred over IPv4.
2127 PH/68 The bounce_return_message and bounce_return_body options were not being
2128 honoured for bounces generated during the reception of non-SMTP messages.
2129 In particular, this applied to messages rejected by the ACL. This bug has
2130 been fixed. However, if bounce_return_message is true and bounce_return_
2131 body is false, the headers that are returned for a non-SMTP message
2132 include only those that have been read before the error was detected.
2133 (In the case of an ACL rejection, they have all been read.)
2135 PH/69 The HTML version of the specification is now built in a directory called
2136 spec_html instead of spec.html, because the latter looks like a path with
2137 a MIME-type, and this confuses some software.
2139 PH/70 Catch two compiler warnings in sieve.c.
2141 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2142 function verify_get_ident() calls ip_connect() to connect a socket, but
2143 if the "connect()" function timed out, ip_connect() used to close the
2144 socket. However, verify_get_ident() also closes the socket later, and in
2145 between Exim writes to the log, which may get opened at this point. When
2146 the socket was closed in ip_connect(), the log could get the same file
2147 descriptor number as the socket. This naturally causes chaos. The fix is
2148 not to close the socket in ip_connect(); the socket should be closed by
2149 the function that creates it. There was only one place in the code where
2150 this was missing, in the iplookup router, which I don't think anybody now
2151 uses, but I've fixed it anyway.
2153 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2154 well as to direct DNS lookups. Otherwise the handling of names in host
2155 lists is inconsistent and therefore confusing.
2161 PH/01 Two changes to the default runtime configuration:
2163 (1) Move the checks for relay_from_hosts and authenticated clients from
2164 after to before the (commented out) DNS black list checks.
2166 (2) Add control=submission to the relay_from_hosts and authenticated
2167 clients checks, on the grounds that messages accepted by these
2168 statements are most likely to be submissions.
2170 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2172 (1) Generate an error if the third argument for the ${prvs expansion is
2175 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2178 (3) Reset the variables that are obtained from the first argument of
2179 ${prvscheck and used in the second argument before leaving the code,
2180 because their memory is reclaimed, so using them afterwards may do
2183 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2184 one (it's much easier than Tom thought :-).
2186 (5) Because of (4), we can now allow for the use of $prvscheck_result
2187 inside the third argument.
2189 PH/03 For some reason, the default setting of PATH when running a command from
2190 a pipe transport was just "/usr/bin". I have changed it to
2193 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2194 anything to be listed in the output from -bV.
2196 PH/05 When a filter generated an autoreply, the entire To: header line was
2197 quoted in the delivery log line, like this:
2199 => >A.N.Other <ano@some.domain> <original@ddress> ...
2201 This has been changed so that it extracts the operative address. There
2202 may be more than one such address. If so, they are comma-separated, like
2205 => >ano@some.domain,ona@other.domain <original@ddress> ...
2207 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2208 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2209 not being looked up in the rDNS to get a host name, Exim was showing the
2210 IP address twice in Received: lines, even though the IP addresses were
2211 identical. For example:
2213 Received: from [1.2.3.4] (helo=[1.2.3.4])
2215 However, if the real host name was known, it was omitting the HELO data
2216 if it matched the actual IP address. This has been tidied up so that it
2217 doesn't show the same IP address twice.
2219 PH/07 When both +timestamp and +memory debugging was on, the value given by
2220 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2221 called by the debug printing, thereby overwriting the timestamp buffer.
2222 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2224 PH/08 When the original message was included in an autoreply transport, it
2225 always said "this is a copy of the message, including all the headers",
2226 even if body_only or headers_only was set. It now gives an appropriate
2229 PH/09 Applied a patch from the Sieve maintainer which:
2231 o fixes some comments
2232 o adds the (disabled) notify extension core
2233 o adds some debug output for the result of if/elsif tests
2234 o points to the current vacation draft in the documentation
2235 and documents the missing references header update
2239 o fixes a bug in processing the envelope test (when testing
2240 multiple envelope elements, the last element determinted the
2243 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2244 Electronic Mail") by including:
2246 Auto-submitted: auto-generated
2248 in the messages that it generates (bounce messages and others, such as
2249 warnings). In the case of bounce messages for non-SMTP mesages, there was
2250 also a typo: it was using "Auto_submitted" (underscore instead of
2251 hyphen). Since every message generated by Exim is necessarily in response
2252 to another message, thes have all been changed to:
2254 Auto-Submitted: auto-replied
2256 in accordance with these statements in the RFC:
2258 The auto-replied keyword:
2260 - SHOULD be used on messages sent in direct response to another
2261 message by an automatic process,
2263 - MUST NOT be used on manually-generated messages,
2265 - MAY be used on Delivery Status Notifications (DSNs) and Message
2266 Disposition Notifications (MDNs),
2268 - MUST NOT be used on messages generated by automatic or periodic
2269 processes, except for messages which are automatic responses to
2272 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2273 to the default Received: header definition.
2275 PH/12 Added log selector acl_warn_skipped (default on).
2277 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2278 variables because (a) they are in the wrong storage pool and (b) even if
2279 they were copied, it wouldn't work properly because of the caching.
2281 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2282 checking when decoding. Apparently there are clients that generate
2283 overlong encoded strings. Why am I not surprised?
2285 PH/15 If the first argument of "${if match_address" was not empty, but did not
2286 contain an "@" character, Exim crashed. Now it writes a panic log message
2287 and treats the condition as false.
2289 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2291 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2292 extension "envelope-auth". The code is finished and in agreement with
2293 other implementations, but there is no documentation so far and in fact,
2294 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2295 not changing the active code.
2297 Print executed "if" and "elsif" statements when debugging is used. This
2298 helps a great deal to understand what a filter does.
2300 Document more things not specified clearly in RFC3028. I had all this
2301 sorted out, when out of a sudden new issues came to my mind. Oops."
2303 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2306 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2307 canonical form (as documented). However, after a host name lookup from
2308 the IP address, check_host() was doing a simple string comparison with
2309 addresses acquired from the DNS when checking that the found name did
2310 have the original IP as one of its addresses. Since any found IPv6
2311 addresses are likely to be in abbreviated form, the comparison could
2312 fail. Luckily, there already exists a function for doing the comparison
2313 by converting both addresses to binary, so now that is used instead of
2314 the text comparison.
2316 PH/20 There was another similar case to PH/19, when a complete host name was
2317 given in a host list; looking up its IP address could give an abbreviated
2318 form, whereas the current host's name might or might not be abbreviated.
2319 The same fix has been applied.
2325 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2326 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2329 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2330 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2332 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2334 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2335 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2336 Also, for "Auto-Submitted", treat anything other than "no" as
2337 non-personal, in accordance with RFC 3834. (Previously it treated
2338 anything starting "auto-" as non-personal.)
2340 TF/01 The control=submission/name=... option had a problem with syntax
2341 errors if the name included a slash character. The /name= option
2342 now slurps the rest of the string, so it can include any characters
2343 but it must come last in the list of options (after /sender_retain
2346 PH/05 Some modifications to the interface to the fake nameserver for the new
2354 TK/01 Added the "success_on_redirect" address verification option. See
2355 NewStuff for rationale and an example.
2357 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2359 PH/02 Patch to exigrep to allow it to work on syslog lines.
2361 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2362 fread() to skip over the body file's header line, because in Cygwin the
2363 header line is locked and is inaccessible.
2365 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2366 co-exist for some time) to make it clear that it is the Exim ID that is
2367 referenced, not the Message-ID: header line.
2369 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2370 string_format() function, because snprintf() does not exist on all
2373 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2374 ${stat: expansion item.
2376 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2377 protocol synchronization error", to keep the pedants happy.
2379 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2380 well as for IRIX systems, when gcc is being used. See the host.c source
2383 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2385 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2388 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2389 transport and to the smtp transport in LMTP mode.
2391 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2393 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2394 run a filter in a subprocess. This could lead to confusion in subsequent
2395 lookups in the parent process. There should also be a search_tidyup() at
2396 the end of the subprocess.
2398 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2399 only if the host matched helo_try_verify_hosts, which caused the
2400 verification to occur when the EHLO/HELO command was issued. The ACL just
2401 tested the remembered result. Now, if a previous verification attempt has
2402 not happened, "verify = helo" does it there and then.
2404 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2406 TK/03 Fix log output including CR from clamd.
2408 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2409 exist provoked a memory error which could cause a segfault.
2411 PH/15 Installed PCRE 6.2
2413 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2415 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2416 of the problem. Specifically, suggested +O2 rather than +O1 for the
2419 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2421 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2422 record, the port was not correctly logged when the outgoing_port log
2423 selector was set (it logged the transort's default port).
2425 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2426 fallback_hosts, and "hosts" in the smtp transport.
2428 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2429 host errors such as "Connection refused".
2431 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2432 authentication with radiusclient 0.4.9:
2434 - Error returned from rc_read_config was caught wrongly
2435 - Username/password not passed on to radius server due to wrong length.
2437 The presumption is that some radiusclient API changes for 4.51/PH/17
2438 were not taken care of correctly. The code is still untested by me (my
2439 Linux distribution still has 0.3.2 of radiusclient), but it was
2440 contributed by a Radius user.
2442 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2443 expanding the "port" option of the smtp transport.
2445 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2446 while reading a MIME header. Thanks to Tom Hughes for a patch.
2448 PH/24 Include config.h inside local_scan.h so that configuration settings are
2451 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2452 that in an ACL for RCPT (for example), you can examine exactly what was
2455 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2456 commands, but it was not correctly comparing the address with the actual
2457 client host address. Thus, it would show the EHLO address in Received:
2458 header lines when this was not necessary.
2460 PH/27 Added the % operator to ${eval:}.
2462 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2463 it should be ignoring failures (because with -C, for example, it has lost
2464 privilege). It wasn't ignoring creation failures other than "already
2467 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2470 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2471 because an input line was too long, either on its own, or by virtue of
2472 too many continuations, the temporary file was not being removed, and the
2473 return code was incorrect.
2475 PH/31 Missing "BOOL" in function definition in filtertest.c.
2477 PH/32 Applied Sieve patches from the maintainer.
2479 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2481 PH/33 Added "verify = not_blind".
2483 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2484 Local/Makefile (with some defaults set). These are used in built scripts
2485 such as exicyclog, but they have never been used in the exim_install
2486 script (though there are many overriding facilities there). I have
2487 arranged that the exim_install script now takes note of these two
2490 PH/35 Installed configuration files for Dragonfly.
2492 PH/36 When a locally submitted message by a trusted user did not contain a
2493 From: header, and the sender address was obtained from -f or from an SMTP
2494 MAIL command, and the trusted user did not use -F to supply a sender
2495 name, $originator_name was incorrectly used when constructing a From:
2496 header. Furthermore, $originator_name was used for submission mode
2497 messages from external hosts without From: headers in a similar way,
2498 which is clearly wrong.
2500 PH/37 Added control=suppress_local_fixups.
2502 PH/38 When log_selector = +received_sender was set, and the addition of the
2503 sender made the log line's construction buffer exactly full, or one byte
2504 less than full, an overflow happened when the terminating "\n" was
2507 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2508 when the result of a list match is failure because a DNS lookup failed.
2510 PH/40 RM_COMMAND is now used in the building process.
2512 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2513 the "build-* directories that it finds.
2515 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2516 address in a domain literal was a prefix of an interface address.
2518 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2519 when verifying a sender address, unless rewrite_headers is false.
2521 PH/44 Wrote a long comment about why errors_to addresses are verified as
2522 recipients, not senders.
2524 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2525 the ratelimit ACL was added.
2527 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2529 PH/46 Added extra information about PostgreSQL errors to the error string.
2531 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2532 avoiding the need to install special zones in a real server. This is
2533 backwards compatible; if it can't find the fake resolver, it drops back.
2534 Thus, both old and new test suites can be run.
2536 TF/02 Added util/ratelimit.pl
2538 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2539 clock is set back in time.
2541 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2542 Candler <B.Candler@pobox.com>.
2544 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2545 OK for addresses that are the result of redirections.
2547 PH/48 A number of further additions for the benefit of the new test suite,
2548 including a fake gethostbyname() that interfaces to the fake DNS resolver
2551 TF/06 The fix for widen_domains has also been applied to qualify_single and
2552 search_parents which are the other dnslookup options that can cause
2555 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2558 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2560 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2561 service" if it encountered an MX record with an empty target hostname.
2562 The message is now "an MX or SRV record indicated no SMTP service".
2564 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2565 if the DNS of the sending site is misconfigured. This is quite a
2566 common situation. This change restores the behaviour of treating a
2567 helo verification defer as a failure.
2569 PH/51 If self=fail was set on a router, the bounce message did not include the
2570 actual error message.
2576 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2578 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2579 command itself ended in error, the underlying message about the transport
2580 filter timeout was being overwritten with the pipe command error. Now the
2581 underlying error message should be appended to the second error message.
2583 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2585 PH/02 Reduce the amount of output that "make" produces by default. Full output
2586 can still be requested.
2588 PH/03 The warning log line about a condition test deferring for a "warn" verb
2589 was being output only once per connection, rather than after each
2590 occurrence (because it was using the same function as for successful
2591 "warn" verbs). This seems wrong, so I have changed it.
2593 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2594 it should not have, which might have caused a crash in the right
2595 circumstances, but probably never did.
2597 PH/04 Installed a modified version of Tony Finch's patch to make submission
2598 mode fix the return path as well as the Sender: header line, and to
2599 add a /name= option so that you can make the user's friendly name appear
2602 TF/03 Added the control = fakedefer ACL modifier.
2604 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2605 Mark Lowes for thorough testing.
2607 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2609 TK/03 Merged latest SRS patch from Miles Wilton.
2611 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2612 with the definition in sysexits.h (which is #included earlier).
2613 Fortunately, Exim does not actually use EX_OK. The code used to try to
2614 preserve the sysexits.h value, by assumimg that macro definitions were
2615 scanned for macro replacements. I have been disabused of this notion,
2616 so now the code just undefines EX_OK before #including unistd.h.
2618 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2619 in the smtp transport. When a block could not be written in a single
2620 write() function, the timeout was being re-applied to each part-write.
2621 This seems wrong - if the receiver was accepting one byte at a time it
2622 would take for ever. The timeout is now adjusted when this happens. It
2623 doesn't have to be particularly precise.
2625 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2626 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2628 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2629 without a domain if the check to <postmaster@domain> fails.
2631 SC/01 Eximstats: added -xls and the ability to specify output files
2632 (patch written by Frank Heydlauf).
2634 SC/02 Eximstats: use FileHandles for outputing results.
2636 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2638 SC/04 Eximstats: fixed display of large numbers with -nvr option
2640 SC/05 Eximstats: fixed merging of reports with empty tables.
2642 SC/06 Eximstats: added the -include_original_destination flag
2644 SC/07 Eximstats: removed tabs and trailing whitespace.
2646 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2648 TK/06 MBOX spool code: Add real "From " MBOX separator line
2649 so the .eml file is really in mbox format (even though
2650 most programs do not really care). Patch from Alex Miller.
2652 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2653 The latter is generated from $received_to and is only set if the
2654 message has one envelope recipient. SA can use these headers,
2655 obviously out-of-the-box. Patch from Alex Miller.
2657 PH/08 The ${def test on a variable was returning false if the variable's
2658 value was "0", contrary to what the specification has always said!
2659 The result should be true unless the variable is empty.
2661 PH/09 The syntax error of a character other than { following "${if
2662 def:variable_name" (after optional whitespace) was not being diagnosed.
2663 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2664 accidental colon was present, for example, could give incorrect results.
2666 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2667 result is used (not including appendfile, where other changes are about
2670 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2671 This involved changing a lot of size variables from int to off_t. It
2672 should work with maildirs and everything.
2674 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2675 spamd dying while we are connected to it.
2677 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2680 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2681 function for BDB 4.3.
2683 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2685 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2686 the sources for PCRE have been re-arranged and more files are now
2689 PH/15 The code I had for printing potentially long long variables in PH/11
2690 above was not the best (it lost precision). The length of off_t variables
2691 is now inspected at build time, and an appropriate printing format (%ld
2692 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2693 to be "long long int" or "long int". This is needed for the internal
2694 formatting function string_vformat().
2696 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2697 the configuration file to be ":syslog", then the script "guesses" where
2698 the logs files are, rather than using the compiled in default. In our
2699 case the guess is not the same as the compiled default, so the script
2700 suddenly stopped working when I started to use syslog. The patch checks
2701 to see if log_file_path is "". If so, it attempts to read it from exim
2702 with no configuration file to get the compiled in version, before it
2703 falls back to the previous guessing code."
2705 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2706 implementing BATV in an Exim configuration. See NewStuff for the gory
2709 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2710 Makefile that are specific to HP-UX.
2712 PH/18 If the "use_postmaster" option was set for a recipient callout together
2713 with the "random" option, the postmaster address was used as the MAIL
2714 FROM address for the random test, but not for the subsequent recipient
2715 test. It is now used for both.
2717 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2718 patch removes a few documentation additions to RFC 3028, because the
2719 latest draft now contains them. It adds the new en;ascii-case comparator
2720 and a new error check for 8bit text in MIME parts. Comparator and
2721 require names are now matched exactly. I enabled the subaddress
2722 extension, but it is not well tested yet (read: it works for me)."
2724 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2725 rework some of the code of TK/09 above to avoid the hardwired use of
2726 "%lld" and "long long". Replaced the call to snprintf() with a call to
2729 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2730 records point to non-existent hosts", "retry timeout exceeded", and
2731 "retry time not reached for any host after a long failure period".
2733 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2734 experimental DomainKeys support:
2736 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2737 (2) On an error such as an illegally used "control", the wrong name for
2738 the control was given.
2740 These problems did NOT occur unless DomainKeys support was compiled.
2742 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2744 PH/24 Added ${if match_ip condition.
2746 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2747 databases so that it will be absolutely obvious if a crash occurs in the
2748 DB library. This is a regular occurrence (often caused by mis-matched
2751 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2752 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2753 picked up on a user's system that detects such things. There doesn't seem
2754 to be a gcc warning option for this - only an attribute that has to be
2755 put on the function's prototype. It seems that in Fedora Core 4 they have
2756 set this on a number of new functions. No doubt there will be more in due
2759 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2760 specify a transport. However, if an address that was verified by such a
2761 router was the subject of a callout, Exim crashed because it tried to
2762 read the rcpt_include_affixes from the non-existent transport. Now it
2763 just assumes that the setting of that option is false. This bug was
2764 introduced by 4.51/PH/31.
2766 PH/28 Changed -d+all to exclude +memory, because that information is very
2767 rarely of interest, but it makes the output a lot bigger. People tend to
2768 do -d+all out of habit.
2770 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2771 code in os-type was giving problems when libc.so lives in lib64, like on
2774 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2775 aren't the modern standard, and it seems that some systems' include files
2776 don't always have them. Exim was already checking for some of the newer
2777 ones like T_AAAA, and defining it itself. I've added checks for all the
2778 record types that Exim uses.
2780 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2781 not automatically generating a new one, as it is supposed to. This
2782 prevented TLS from working. If the file did exist, but contained invalid
2783 data, a new version was generated, as expected. It was only the case of a
2784 non-existent file that was broken.
2786 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2787 with a change in libdomainkeys > 0.64.
2789 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2790 from DNS. If the selector record carries the flag, it now has
2791 precedence over the domain-wide flag.
2793 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2795 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2796 the use of a port name that isn't defined in /etc/services) occurred, the
2797 message was deferred as in a normal delivery, and thus remained on the
2798 spool, instead of being failed because of the mua_wrapper setting. This
2799 is now fixed, and I tidied up some of the mua_wrapper messages at the
2802 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2803 the messages in a hash of arrays rather than using individual hashes.
2804 This is a bit cleaner and results in dramatic memory savings, albeit
2805 at a slight CPU cost.
2807 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2808 as requested by Marc Sherman.
2810 SC/10 Eximstats: added histograms for user specified patterns as requested
2813 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2815 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2816 fopen() in the content-scanning modules that did not already have it.
2822 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2823 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2825 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2827 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2829 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2830 to test Sieve filters that use "vacation".
2832 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2833 that changes the way the GnuTLS parameters are stored in the cache file.
2834 The new format can be generated externally. For backward compatibility,
2835 if the data in the cache doesn't make sense, Exim assumes it has read an
2836 old-format file, and it generates new data and writes a new file. This
2837 means that you can't go back to an older release without removing the
2840 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2841 work if there are any delivery delays because "one_time" forces the
2842 parent to be marked "delivered", so its unseen clone is never tried
2843 again. For this reason, Exim now forbids the simultaneous setting of
2846 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2847 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2848 entry if you want to know the details. The fix, however, neglected to
2849 consider the case when local delivery batching is involved. The test for
2850 "previously delivered" was not happening when checking to see if an
2851 address could be batched with a previous (undelivered) one; under
2852 certain circumstances this could lead to multiple deliveries to the same
2855 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2856 in its include files, and this causes problems building Exim.
2858 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2859 header_syntax) but Exim was just ignoring anything given after a slash.
2860 In particular, this caused confusion with an attempt to use "verify =
2861 reverse_host_lookup/defer_ok". An error is now given when options are
2862 supplied for verify items that do not have them. (Maybe reverse_host_
2863 lookup should have a defer_ok option, but that's a different point.)
2865 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2866 defined by RFC 821) to 2048, because there were problems with some AUTH
2867 commands, and RFC 1869 says the size should be increased for extended
2868 SMTP commands that take arguments.
2870 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2873 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2874 "unknown" error; now it says that the functionality isn't in the binary.
2876 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2877 an address' error message when a string expansion fails (syntax or
2878 whatever). Otherwise the password may appear in the log. Following change
2879 PH/42 below, there is no longer a chance of it appearing in a bounce
2882 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2884 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2885 of its addresses was ever tried. (Bugzilla bug #2.)
2887 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2888 the result incorrectly in the debug output. (It correctly added a newline
2889 to what was transported.)
2891 TF/01 Added $received_time.
2893 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2894 commented out examples of how to interface to a virus scanner and to
2895 SpamAssassin. Also added commented examples of av_scanner and
2896 spamd_address settings.
2898 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2899 and controls are allowed in which ACLs. There were a couple of minor
2900 errors. Some of the entries in the conditions table (which is a table of
2901 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2902 negation of where the condition IS allowed.
2904 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2906 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2907 header file does not have a version number, so I've had to invent a new
2908 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2909 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2910 radiusclient), but it was contributed by a Radius user.
2912 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2913 files or directories, for OpenSSL.
2915 PH/19 When an Exim process that is running as root has to create an Exim log
2916 file, it does so in a subprocess that runs as exim:exim so as to get the
2917 ownership right at creation (otherwise, other Exim processes might see
2918 the file with the wrong ownership). There was no test for failure of this
2919 fork() call, which would lead to the process getting stuck as it waited
2920 for a non-existent subprocess. Forks do occasionally fail when resources
2921 run out. I reviewed all the other calls to fork(); they all seem to check
2924 PH/20 When checking for unexpected SMTP input at connect time (before writing
2925 the banner), Exim was not dealing correctly with a non-positive return
2926 from the read() function. If the client had disconnected by this time,
2927 the result was a log entry for a synchronization error with an empty
2928 string after "input=" when read() returned zero. If read() returned -1
2929 (an event I could not check), uninitialized data bytes were printed.
2930 There were reports of junk text (parts of files, etc) appearing after
2933 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2935 PH/22 Added support for macro redefinition, and (re)definition in between
2936 driver and ACL definitions.
2938 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
2939 forgetting to use the resulting value; it was using the unexpanded value.
2941 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
2942 hadn't been configured. The fix is from Juergen Kreileder, who
2943 understands it better than I do:
2945 "Here's what I see happening with three configured cyrus_sasl
2946 authenticators configured (plain, login, cram-md5):
2948 On startup auth_cyrus_sasl_init() gets called for each of these.
2949 This means three calls to sasl_listmech() without a specified mech_list.
2950 => SASL tests which mechs of all available mechs actually work
2951 => three warnings about OTP not working
2952 => the returned list contains: plain, login, cram-md5, digest-md5, ...
2954 With the patch, sasl_listmech() also gets called three times. But now
2955 SASL's mech_list option is set to the server_mech specified in the the
2956 authenticator. Or in other words, the answer from sasl_listmech()
2957 gets limited to just the mech you're testing for (which is different
2959 => the return list contains just 'plain' or 'login', 'cram-md5' or
2960 nothing depending on the value of ob->server_mech.
2962 I've just tested the patch: Authentication still works fine,
2963 unavailable mechs specified in the exim configuration are still
2964 caught, and the auth.log warnings about OTP are gone."
2966 PH/25 When debugging is enabled, the contents of the command line are added
2967 to the debugging output, even when log_selector=+arguments is not
2970 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2971 answer is "GNU", and only if the return is "GNU/something" is the answer
2974 PH/27 $acl_verify_message is now set immediately after the failure of a
2975 verification in an ACL, and so is available in subsequent modifiers. In
2976 particular, the message can be preserved by coding like this:
2978 warn !verify = sender
2979 set acl_m0 = $acl_verify_message
2981 Previously, $acl_verify_message was set only while expanding "message"
2982 and "log_message" when a very denied access.
2984 PH/28 Modified OS/os.c-Linux with
2986 -#ifndef OS_LOAD_AVERAGE
2987 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2989 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2990 nomenclature these days.)
2992 PH/29 Installed patch from the Sieve maintainer that adds the options
2993 sieve_useraddress and sieve_subaddress to the redirect router.
2995 PH/30 In these circumstances:
2996 . Two addresses routed to the same list of hosts;
2997 . First host does not offer TLS;
2998 . First host accepts first address;
2999 . First host gives temporary error to second address;
3000 . Second host offers TLS and a TLS session is established;
3001 . Second host accepts second address.
3002 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3003 and peerdn, if requested) that were in fact used only for the second
3006 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3007 attention to any local part prefix or suffix that was matched by the
3008 router that accepted the address. It now behaves in the same way as it
3009 does for delivery: the affixes are removed from the local part unless
3010 rcpt_include_affixes is set on the transport.
3012 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3013 timeout during the DATA phase of an incoming message.
3015 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3016 applied a patch sanctioned by the Sieve maintainer.
3018 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3019 the uid or gid is negative. A case of a negative gid caused this to be
3020 noticed. The fix allows for either to be negative.
3022 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3023 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3026 PH/36 The change PH/12 above was broken. Fixed it.
3028 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3029 the grounds that routing the same address twice would always produce the
3030 same answer. This might have been true once, but it is certainly no
3031 longer true now. Routing a child address may depend on the previous
3032 routing that produced that child. Some complicated redirection strategies
3033 went wrong when messages had multiple recipients, and made Exim's
3034 behaviour dependent on the order in which the addresses were given.
3036 I have moved the duplicate checking until after the routing is complete.
3037 Exim scans the addresses that are assigned to local and remote
3038 transports, and removes any duplicates. This means that more work will be
3039 done, as duplicates will always all be routed, but duplicates are
3040 presumably rare, so I don't expect this is of any significance.
3042 For deliveries to pipes, files, and autoreplies, the duplicate checking
3043 still happens during the routing process, since they are not going to be
3046 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3047 It corrects a timeout issue with spamd. This is Ian's comment: "The
3048 background is that sometimes spamd either never reads data from a
3049 connection it has accepted, or it never writes response data. The exiscan
3050 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3051 blindly assumes that writes won't block so it may never time out."
3053 PH/39 Allow G after quota size as well as K and M.
3055 PH/40 The value set for $authenticated_id in an authenticator may not contain
3056 binary zeroes or newlines because the value is written to log lines and
3057 to spool files. There was no check on this. Now the value is run through
3058 the string_printing() function so that such characters are converted to
3059 printable escape sequences.
3061 PH/41 $message_linecount is a new variable that contains the total number of
3062 lines in the message. Compare $body_linecount, which is the count for the
3065 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3066 bounce and delay warning messages, except in certain special cases, which
3069 (a) An SMTP error message from a remote host;
3070 (b) A message specified in a :fail: redirection;
3071 (c) A message specified in a "fail" command in a system filter;
3072 (d) A message specified in a FAIL return from the queryprogram router;
3073 (e) A message specified by the cannot_route_message router option.
3075 In these cases only, Exim does include the error details in bounce and
3076 warning messages. There are also a few cases where bland messages such
3077 as "unrouteable address" or "local delivery error" are given.
3079 PH/43 $value is now also set for the "else" part of a ${run expansion.
3081 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3082 being worked on, but at least Exim now implements the latest version to
3085 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3086 process to complete was treated as a delivery failure, a timeout while
3087 writing the message to the pipe was logged, but erroneously treated as a
3088 successful delivery. Such timeouts include transport filter timeouts. For
3089 consistency with the overall process timeout, these timeouts are now
3090 treated as errors, giving rise to delivery failures by default. However,
3091 there is now a new Boolean option for the pipe transport called
3092 timeout_defer, which, if set TRUE, converts the failures into defers for
3093 both kinds of timeout. A transport filter timeout is now identified in
3096 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3097 systems where "make" and "gmake" are different, calling "gmake" at top
3098 level broke things. I've arranged for the value of $(MAKE) to be passed
3099 from the Makefile to this script so that it can call the same version of
3103 A note about Exim versions 4.44 and 4.50
3104 ----------------------------------------
3106 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3107 changes of various kinds. As a consequence, a big documentation update was
3108 needed. This delayed the release for rather longer than seemed good, especially
3109 in the light of a couple of (minor) security issues. Therefore, the changes
3110 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3111 release. So 4.44 and 4.50 are in effect two different branches that both start
3114 I have left the 4.50 change log unchanged; it contains all the changes since
3115 4.43. The change log for 4.44 is below; many of its items are identical to
3116 those for 4.50. This seems to be the most sensible way to preserve the
3117 historical information.
3123 1. Minor wording change to the doc/README.SIEVE file.
3125 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3126 computation of the current number of files was incorrect.
3128 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3129 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3132 4. Give more explanation in the error message when the command for a transport
3133 filter fails to execute.
3135 5. There are several places where Exim runs a non-Exim command in a
3136 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3137 was being done only for the command run by the queryprogram router. It is
3138 now done for all such subprocesses. The other cases are: ${run, transport
3139 filters, and the commands run by the lmtp and pipe transports.
3141 6. Added CONFIGURE_GROUP build-time option.
3143 7. Some older OS have a limit of 256 on the maximum number of file
3144 descriptors. Exim was using setrlimit() to set 1000 as a large value
3145 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3146 systems. I've change it so that if it can't get 1000, it tries for 256.
3148 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3149 was an oversight, and furthermore, ever since the addition of extra
3150 controls (e.g. 4.43/32), the checks on when to allow different forms of
3151 "control" were broken. There should now be diagnostics for all cases when a
3152 control that does not make sense is encountered.
3154 9. Added the /retain_sender option to "control=submission".
3156 10. $recipients is now available in the predata ACL (oversight).
3158 11. Tidy the search cache before the fork to do a delivery from a message
3159 received from the command line. Otherwise the child will trigger a lookup
3160 failure and thereby defer the delivery if it tries to use (for example) a
3161 cached ldap connection that the parent has called unbind on.
3163 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3164 of $address_data from the recipient verification was clobbered by the
3165 sender verification.
3167 13. The value of address_data from a sender verification is now available in
3168 $sender_address_data in subsequent conditions in the ACL statement.
3170 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3172 15. Added a new option "connect=<time>" to callout options, to set a different
3175 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3176 was its contents. (It was OK if the option was not defined at all.)
3178 17. A "Completed" log line is now written for messages that are removed from
3179 the spool by the -Mrm option.
3181 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3182 information about exactly what failed.
3184 19. Added -dd to debug only the daemon process.
3186 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3187 handles timeouts, both on the server side and network timeouts. Renamed the
3188 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3190 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3191 It is now set to "smtps".
3193 22. $host_address is now set to the target address during the checking of
3194 ignore_target_hosts.
3196 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3197 being passed; this would have caused $sender_host_name to have been used if
3198 matching the list had actually called for a host name (not very likely,
3199 since this list is usually IP addresses). A host name is now passed as
3202 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3203 code that specifies a non-restarting handler (typically sigaction() in
3204 modern systems) in an attempt to fix a rare and obscure crash bug.
3206 25. Narrowed the window for a race in the daemon that could cause it to ignore
3207 SIGCHLD signals. This is not a major problem, because they are used only to
3208 wake it up if nothing else does.
3210 26. A malformed maildirsize file could cause Exim to calculate negative values
3211 for the mailbox size or file count. Odd effects could occur as a result.
3212 The maildirsize information is now recalculated if the size or filecount
3215 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3216 support for a long time. Removed HAVE_SYS_VFS_H.
3218 28. Installed the latest version of exipick from John Jetmore.
3220 29. In an address list, if the pattern was not a regular expression, an empty
3221 subject address (from a bounce message) matched only if the pattern was an
3222 empty string. Non-empty patterns were not even tested. This was the wrong
3223 because it is perfectly reasonable to use an empty address as part of a
3224 database query. An empty address is now tested by patterns that are
3225 lookups. However, all the other forms of pattern expect the subject to
3226 contain a local part and a domain, and therefore, for them, an empty
3227 address still always fails if the pattern is not itself empty.
3229 30. Exim went into a mad DNS loop when attempting to do a callout where the
3230 host was specified on an smtp transport, and looking it up yielded more
3231 than one IP address.
3233 31. Re-factored the code for checking spool and log partition space into a
3234 function that finds that data and another that does the check. The former
3235 is then used to implement four new variables: $spool_space, $log_space,
3236 $spool_inodes, and $log_inodes.
3238 32. The RFC2047 encoding function was originally intended for short strings
3239 such as real names; it was not keeping to the 75-character limit for
3240 encoded words that the RFC imposes. It now respects the limit, and
3241 generates multiple encoded words if necessary. To be on the safe side, I
3242 have increased the buffer size for the ${rfc2047: expansion operator from
3245 33. It is now permitted to omit both strings after an "if" condition; if the
3246 condition is true, the result is "true". As before, when the second string
3247 is omitted, a false condition yields an empty string. This makes it less
3248 cumbersome to write custom ACL and router conditions.
3250 34. Failure to deliver a bounce message always caused it to be frozen, even if
3251 there was an errors_to setting on the router. The errors_to setting is now
3254 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3255 canonical form (fully expanded) before being placed in
3256 $sender_host_address.
3258 36. The table in the code that translates DNS record types into text (T_A to
3259 "A" for instance) was missing entries for NS and CNAME. It is just possible
3260 that this could have caused confusion if both these types were looked up
3261 for the same domain, because the text type is used as part of Exim's
3262 per-process caching. But the chance of anyone hitting this buglet seems
3265 37. The dnsdb lookup has been extended in a number of ways.
3267 (1) There is a new type, "zns", which walks up the domain tree until it
3268 finds some nameserver records. It should be used with care.
3270 (2) There is a new type, "mxh", which is like "mx" except that it returns
3271 just the host names, not the priorities.
3273 (3) It is now possible to give a list of domains (or IP addresses) to be
3274 looked up. The behaviour when one of the lookups defers can be
3275 controlled by a keyword.
3277 (4) It is now possible to specify the separator character for use when
3278 multiple records are returned.
3280 38. The dnslists ACL condition has been extended: it is now possible to supply
3281 a list of IP addresses and/or domains to be looked up in a particular DNS
3284 39. Added log_selector=+queue_time_overall.
3286 40. When running the queue in the test harness, wait just a tad after forking a
3287 delivery process, to get repeatability of debugging output.
3289 41. Include certificate and key file names in error message when GnuTLS fails
3290 to set them up, because the GnuTLS error message doesn't include the name
3291 of the failing file when there is a problem reading it.
3293 42. Allow both -bf and -bF in the same test run.
3295 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3297 44. The "Exiscan patch" is now merged into the mainline Exim source.
3299 45. Sometimes the final signoff response after QUIT could fail to get
3300 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3301 < 0 before doing a fflush(). This bug looks as though it goes back to the
3302 introduction of TLS in release 3.20, but "sometimes" must have been rare
3303 because the tests only now provoked it.
3305 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3306 (this can affect the format of dates).
3308 47. exim_tidydb, when checking for the continued existence of a message for
3309 which it has found a message-specific retry record, was not finding
3310 messages that were in split spool directories. Consequently, it was
3311 deleting retry records that should have stayed in existence.
3313 48. Steve fixed some bugs in eximstats.
3315 49. The SPA authentication driver was not abandoning authentication and moving
3316 on to the next authenticator when an expansion was forced to fail,
3317 contradicting the general specification for all authenticators. Instead it
3318 was generating a temporary error. It now behaves as specified.
3320 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3321 (the order specifies the preference for clients). The order is now AES256,
3322 AES128, 3DES, ARCFOUR128.
3324 51. Small patch to Sieve code - explicitly set From: when generating an
3327 52. Exim crashed if a remote delivery caused a very long error message to be
3328 recorded - for instance if somebody sent an entire SpamAssassin report back
3329 as a large number of 550 error lines. This bug was coincidentally fixed by
3330 increasing the size of one of Exim's internal buffers (big_buffer) that
3331 happened as part of the Exiscan merge. However, to be on the safe side, I
3332 have made the code more robust (and fixed the comments that describe what
3335 53. Now that there can be additional text after "Completed" in log lines (if
3336 the queue_time_overall log selector is set), a one-byte patch to exigrep
3337 was needed to allow it to recognize "Completed" as not the last thing in
3340 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3341 patch that reportedly fixes this has been added. I am not expert enough to
3342 create a test for it. This is what the patch creator wrote:
3344 "I found a little strange behaviour of ldap code when working with
3345 Windows 2003 AD Domain, where users was placed in more than one
3346 Organization Units. When I tried to give exim partial DN, the exit code
3347 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3348 But simultaneously result of request was absolutely normal ldap result,
3349 so I produce this patch..."
3351 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3352 REFERENCE, so I have modified the code to exclude the patch when that macro
3355 55. Some experimental protocols are using DNS PTR records for new purposes. The
3356 keys for these records are domain names, not reversed IP addresses. The
3357 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3358 leaves it alone. Component reversal etc. now happens only for IP addresses.
3361 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3363 57. Double the size of the debug message buffer (to 2048) so that more of very
3364 long debug lines gets shown.
3366 58. The exicyclog utility now does better if the number of log files to keep
3367 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3369 59. Two changes related to the smtp_active_hostname option:
3371 (1) $smtp_active_hostname is now available as a variable.
3372 (2) The default for smtp_banner uses $smtp_active_hostname instead
3373 of $primary_hostname.
3375 60. The host_aton() function is supposed to be passed a string that is known
3376 to be a valid IP address. However, in the case of IPv6 addresses, it was
3377 not checking this. This is a hostage to fortune. Exim now panics and dies
3378 if the condition is not met. A case was found where this could be provoked
3379 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3380 components; fortuitously, this particular loophole had already been fixed
3381 by change 4.50/55 above.
3383 If there are any other similar loopholes, the new check in host_aton()
3384 itself should stop them being exploited. The report I received stated that
3385 data on the command line could provoke the exploit when Exim was running as
3386 exim, but did not say which command line option was involved. All I could
3387 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3388 running as the user.
3391 61. There was a buffer overflow vulnerability in the SPA authentication code
3392 (which came originally from the Samba project). I have added a test to the
3393 spa_base64_to_bits() function which I hope fixes it.
3396 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3397 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3399 63. The daemon start-up calls getloadavg() while still root for those OS that
3400 need the first call to be done as root, but it missed one case: when
3401 deliver_queue_load_max is set with deliver_drop_privilege. This is
3402 necessary for the benefit of the queue runner, because there is no re-exec
3403 when deliver_drop_privilege is set.
3405 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3406 This has been fixed.
3408 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3409 was in use, was not putting the data itself into the right store pool;
3410 consequently, it could be overwritten for a subsequent message in the same
3411 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3414 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3416 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3417 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3418 the function were treating the return as a boolean value, which happened to
3419 work because 0=false and not-0=true, but is not correct code.
3421 68. The host_aton() function was not handling scoped IPv6 addresses (those
3422 with, for example, "%eth0" on the end) correctly.
3424 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3425 negated items (that is, ~something) in unsigned ints. Some compilers
3426 apparently mutter when there is no cast.
3428 70. If an address verification called from an ACL failed, and did not produce a
3429 user-specific message (i.e. there was only a "system" message), nothing was
3430 put in $acl_verify_message. In this situation, it now puts the system
3433 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3434 session; change 4.31/43 added the unwanted input to the log line - except
3435 that it did not do this in the start of session case. It now does.
3437 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3438 This is wrong and can cause the other end to generate a synchronization
3439 error if it is another Exim or anything else that does the synchronization
3440 check. A QUIT command is no longer sent after a timeout.
3442 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3443 during host lookups.
3445 74. The defer_ok option of callout verification was not working if it was used
3446 when verifying addresses in header lines, that is, for this case:
3448 verify = header_sender/callout=defer_ok
3450 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3451 those file descriptors could be used for SMTP connections. If anything
3452 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3453 could be sent to the SMTP client, causing chaos. The daemon now opens
3454 stdin, stdout, and stderr to /dev/null when it puts itself into the
3457 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3458 log by default. The user can override this with suitable Perl magic.
3460 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3461 the log message when discard triggers, was not working for the DATA ACL or
3462 for the non-SMTP ACL.
3464 78. Error message wording change in sieve.c.
3466 79. If smtp_accept_max_per_host was set, the number of connections could be
3467 restricted to fewer than expected, because the daemon was trying to set up
3468 a new connection before checking whether the processes handling previous
3469 connections had finished. The check for completed processes is now done
3470 earlier. On busy systems, this bug wouldn't be noticed because something
3471 else would have woken the daemon, and it would have reaped the completed
3474 80. If a message was submitted locally by a user whose login name contained one
3475 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3476 It caused a spool format error. I have fixed the spool reading code. A
3477 related problem was that the "from" clause in the Received: line became
3478 illegal because of the space(s). It is now covered by ${quote_local_part.
3480 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3483 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3485 83. Patch from Sieve maintainer to fix unterminated string problem in
3486 "vacation" handling.
3488 84. Some minor changes to the Linux configuration files to help with other
3489 OS variants using glibc.
3491 85. One more patch for Sieve to update vacation handling to latest spec.
3494 ----------------------------------------------------
3495 See the note above about the 4.44 and 4.50 releases.
3496 ----------------------------------------------------
3502 1. Change 4.43/35 introduced a bug that caused file counts to be
3503 incorrectly computed when quota_filecount was set in an appendfile
3506 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3507 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3510 3. Give more explanation in the error message when the command for a transport
3511 filter fails to execute.
3513 4. There are several places where Exim runs a non-Exim command in a
3514 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3515 was being done only for the command run by the queryprogram router. It is
3516 now done for all such subprocesses. The other cases are: ${run, transport
3517 filters, and the commands run by the lmtp and pipe transports.
3519 5. Some older OS have a limit of 256 on the maximum number of file
3520 descriptors. Exim was using setrlimit() to set 1000 as a large value
3521 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3522 systems. I've change it so that if it can't get 1000, it tries for 256.
3524 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3525 was an oversight, and furthermore, ever since the addition of extra
3526 controls (e.g. 4.43/32), the checks on when to allow different forms of
3527 "control" were broken. There should now be diagnostics for all cases when a
3528 control that does not make sense is encountered.
3530 7. $recipients is now available in the predata ACL (oversight).
3532 8. Tidy the search cache before the fork to do a delivery from a message
3533 received from the command line. Otherwise the child will trigger a lookup
3534 failure and thereby defer the delivery if it tries to use (for example) a
3535 cached ldap connection that the parent has called unbind on.
3537 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3538 of $address_data from the recipient verification was clobbered by the
3539 sender verification.
3541 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3542 was its contents. (It was OK if the option was not defined at all.)
3544 11. A "Completed" log line is now written for messages that are removed from
3545 the spool by the -Mrm option.
3547 12. $host_address is now set to the target address during the checking of
3548 ignore_target_hosts.
3550 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3551 being passed; this would have caused $sender_host_name to have been used if
3552 matching the list had actually called for a host name (not very likely,
3553 since this list is usually IP addresses). A host name is now passed as
3556 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3557 code that specifies a non-restarting handler (typically sigaction() in
3558 modern systems) in an attempt to fix a rare and obscure crash bug.
3560 15. Narrowed the window for a race in the daemon that could cause it to ignore
3561 SIGCHLD signals. This is not a major problem, because they are used only to
3562 wake it up if nothing else does.
3564 16. A malformed maildirsize file could cause Exim to calculate negative values
3565 for the mailbox size or file count. Odd effects could occur as a result.
3566 The maildirsize information is now recalculated if the size or filecount
3569 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3570 support for a long time. Removed HAVE_SYS_VFS_H.
3572 18. Updated exipick to current release from John Jetmore.
3574 19. Allow an empty sender to be matched against a lookup in an address list.
3575 Previously the only cases considered were a regular expression, or an
3578 20. Exim went into a mad DNS lookup loop when doing a callout where the
3579 host was specified on the transport, if the DNS lookup yielded more than
3582 21. The RFC2047 encoding function was originally intended for short strings
3583 such as real names; it was not keeping to the 75-character limit for
3584 encoded words that the RFC imposes. It now respects the limit, and
3585 generates multiple encoded words if necessary. To be on the safe side, I
3586 have increased the buffer size for the ${rfc2047: expansion operator from
3589 22. Failure to deliver a bounce message always caused it to be frozen, even if
3590 there was an errors_to setting on the router. The errors_to setting is now
3593 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3594 canonical form (fully expanded) before being placed in
3595 $sender_host_address.
3597 24. Updated eximstats to version 1.33
3599 25. Include certificate and key file names in error message when GnuTLS fails
3600 to set them up, because the GnuTLS error message doesn't include the name
3601 of the failing file when there is a problem reading it.
3603 26. Expand error message when OpenSSL has problems setting up cert/key files.
3606 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3607 (this can affect the format of dates).
3609 28. exim_tidydb, when checking for the continued existence of a message for
3610 which it has found a message-specific retry record, was not finding
3611 messages that were in split spool directories. Consequently, it was
3612 deleting retry records that should have stayed in existence.
3614 29. eximstats updated to version 1.35
3615 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3616 1.35 - bugfix such that pie charts by volume are generated correctly
3618 30. The SPA authentication driver was not abandoning authentication and moving
3619 on to the next authenticator when an expansion was forced to fail,
3620 contradicting the general specification for all authenticators. Instead it
3621 was generating a temporary error. It now behaves as specified.
3623 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3624 (the order specifies the preference for clients). The order is now AES256,
3625 AES128, 3DES, ARCFOUR128.
3627 31. Small patch to Sieve code - explicitly set From: when generating an
3630 32. Exim crashed if a remote delivery caused a very long error message to be
3631 recorded - for instance if somebody sent an entire SpamAssassin report back
3632 as a large number of 550 error lines. This bug was coincidentally fixed by
3633 increasing the size of one of Exim's internal buffers (big_buffer) that
3634 happened as part of the Exiscan merge. However, to be on the safe side, I
3635 have made the code more robust (and fixed the comments that describe what
3638 33. Some experimental protocols are using DNS PTR records for new purposes. The
3639 keys for these records are domain names, not reversed IP addresses. The
3640 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3641 leaves it alone. Component reversal etc. now happens only for IP addresses.
3644 34. The host_aton() function is supposed to be passed a string that is known
3645 to be a valid IP address. However, in the case of IPv6 addresses, it was
3646 not checking this. This is a hostage to fortune. Exim now panics and dies
3647 if the condition is not met. A case was found where this could be provoked
3648 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3649 components; fortuitously, this particular loophole had already been fixed
3650 by change 4.50/55 or 4.44/33 above.
3652 If there are any other similar loopholes, the new check in host_aton()
3653 itself should stop them being exploited. The report I received stated that
3654 data on the command line could provoke the exploit when Exim was running as
3655 exim, but did not say which command line option was involved. All I could
3656 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3657 running as the user.
3660 35. There was a buffer overflow vulnerability in the SPA authentication code
3661 (which came originally from the Samba project). I have added a test to the
3662 spa_base64_to_bits() function which I hope fixes it.
3665 36. The daemon start-up calls getloadavg() while still root for those OS that
3666 need the first call to be done as root, but it missed one case: when
3667 deliver_queue_load_max is set with deliver_drop_privilege. This is
3668 necessary for the benefit of the queue runner, because there is no re-exec
3669 when deliver_drop_privilege is set.
3671 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3672 was in use, was not putting the data itself into the right store pool;
3673 consequently, it could be overwritten for a subsequent message in the same
3674 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3677 38. Sometimes the final signoff response after QUIT could fail to get
3678 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3679 < 0 before doing a fflush(). This bug looks as though it goes back to the
3680 introduction of TLS in release 3.20, but "sometimes" must have been rare
3681 because the tests only now provoked it.
3687 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3688 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3689 Now it returns an integer. A number of calls were still expecting a T/F
3690 return. Fortuitously, in all cases, the tests worked in OK situations,
3691 which is the norm. However, things would have gone wrong on any write
3692 failures on the smtp file descriptor. This function is used when sending
3693 messages over SMTP and also when doing verify callouts.
3695 2. When Exim is called to do synchronous delivery of a locally submitted
3696 message (the -odf or -odi options), it no longer closes stderr before doing
3699 3. Implemented the mua_wrapper option.
3701 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3703 5. Implemented the functions header_remove(), header_testname(),
3704 header_add_at_position(), and receive_remove_recipient(), and exported them
3707 6. If an ACL "warn" statement specified the addition of headers, Exim already
3708 inserted X-ACL-Warn: at the start if there was no header name. However, it
3709 was not making this test for the second and subsequent header lines if
3710 there were newlines in the string. This meant that an invalid header could
3711 be inserted if Exim was badly configured.
3713 7. Allow an ACL "warn" statement to add header lines at the start or after all
3714 the Received: headers, as well as at the end.
3716 8. Added the rcpt_4xx retry error code.
3718 9. Added postmaster_mailfrom=xxx to callout verification option.
3720 10. Added mailfrom=xxxx to the callout verification option, for verify=
3723 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3724 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3726 12. Inserted some casts to stop certain compilers warning when using pointer
3727 differences as field lengths or precisions in printf-type calls (mostly
3728 affecting debugging statements).
3730 13. Added optional readline() support for -be (dynamically loaded).
3732 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3733 same clock tick as a message's arrival, so that its received time was the
3734 same as the "first fail" time on the retry record, and that message
3735 remained on the queue past the ultimate address timeout, every queue runner
3736 would try a delivery (because it was past the ultimate address timeout) but
3737 after another failure, the ultimate address timeout, which should have then
3738 bounced the address, did not kick in. This was a "< instead of <=" error;
3739 in most cases the first failure would have been in the next clock tick
3740 after the received time, and all would be well.
3742 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3743 being recognized when the domain list was tested by the match_domain
3744 condition in an expansion string.
3746 16. Added the ${str2b64: operator.
3748 17. Exim was always calling setrlimit() to set a large limit for the number of
3749 processes, without checking whether the existing limit was already
3750 adequate. (It did check for the limit on file descriptors.) Furthermore,
3751 errors from getrlimit() and setrlimit() were being ignored. Now they are
3752 logged to the main and panic logs, but Exim does carry on, to try to do its
3753 job under whatever limits there are.
3755 18. Imported PCRE 5.0.
3757 19. Trivial typo in log message " temporarily refused connection" (the leading
3760 20. If the log selector return_path_on_delivery was set and an address was
3761 redirected to /dev/null, the delivery process crashed because it assumed
3762 that a return path would always be set for a "successful" delivery. In this
3763 case, the whole delivery is bypassed as an optimization, and therefore no
3766 21. Internal re-arrangement: the function for sending a challenge and reading
3767 a response while authentication was assuming a zero-terminated challenge
3768 string. It's now changed to take a pointer and a length, to allow for
3769 binary data in such strings.
3771 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3773 23. Exim was not respecting finduser_retries when seeking the login of the
3774 uid under which it was called; it was always trying 10 times. (The default
3775 setting of finduser_retries is zero.) Also, it was sleeping after the final
3776 failure, which is pointless.
3778 24. Implemented tls_on_connect_ports.
3780 25. Implemented acl_smtp_predata.
3782 26. If the domain in control=submission is set empty, Exim assumes that the
3783 authenticated id is a complete email address when it generates From: or
3784 Sender: header lines.
3786 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3787 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3788 chown and chgrp in /bin and hostname in /usr/bin.
3790 28. Exim was keeping the "process log" file open after each use, just as it
3791 does for the main log. This opens the possibility of it remaining open for
3792 long periods when the USR1 signal hits a daemon. Occasional processlog
3793 errors were reported, that could have been caused by this. Anyway, it seems
3794 much more sensible not to leave this file open at all, so that is what now
3797 29. The long-running daemon process does not normally write to the log once it
3798 has entered its main loop, and it closes the log before doing so. This is
3799 so that log files can straightforwardly be renamed and moved. However,
3800 there are a couple of unusual error situations where the daemon does write
3801 log entries, and I had neglected to close the log afterwards.
3803 30. The text of an SMTP error response that was received during a remote
3804 delivery was being truncated at 512 bytes. This is too short for some of
3805 the long messages that one sometimes sees. I've increased the limit to
3808 31. It is now possible to make retry rules that apply only when a message has a
3809 specific sender, in particular, an empty sender.
3811 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3812 it possible to be selective about when SMTP synchronization is enforced.
3814 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3816 32. Implemented hosts_connection_nolog.
3818 33. Added an ACL for QUIT.
3820 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3823 35. Added mailbox_size and mailbox_filecount to appendfile.
3825 36. Added control = no_multiline_responses to ACLs.
3827 37. There was a bug in the logic of the code that waits for the clock to tick
3828 in the case where the clock went backwards by a substantial amount such
3829 that the microsecond fraction of "now" was more than the microsecond
3830 fraction of "then" (but the whole seconds number was less).
3832 38. Added support for the libradius Radius client library this is found on
3833 FreeBSD (previously only the radiusclient library was supported).
3839 1. When certain lookups returned multiple values in the form name=value, the
3840 quoting of the values was not always being done properly. Specifically:
3841 (a) If the value started with a double quote, but contained no whitespace,
3843 (b) If the value contained whitespace other than a space character (i.e.
3844 tabs or newlines or carriage returns) it was not quoted.
3845 This fix has been applied to the mysql and pgsql lookups by writing a
3846 separate quoting function and calling it from the lookup code. The fix
3847 should probably also be applied to nisplus, ibase and oracle lookups, but
3848 since I cannot test any of those, I have not disturbed their existing code.
3850 2. A hit in the callout cache for a specific address caused a log line with no
3851 reason for rejecting RCPT. Now it says "Previous (cached) callout
3852 verification failure".
3854 3. There was an off-by-one bug in the queryprogram router. An over-long
3855 return line was truncated at 256 instead of 255 characters, thereby
3856 overflowing its buffer with the terminating zero. As well as fixing this, I
3857 have increased the buffer size to 1024 (and made a note to document this).
3859 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3860 when Exim is waiting for an SMTP response from a remote server, Exim
3861 restarts its select() call on the socket, thereby resetting its timeout.
3862 This is not a problem when such interrupts are rare. Somebody set up a cron
3863 job to run exiwhat every 2 minutes, which is less than the normal select()
3864 timeout (5 or 10 minutes). This meant that the select() timeout never
3865 kicked in because it was always reset. I have fixed this by comparing the
3866 time when an interrupt arrives with the time at the start of the first call
3867 to select(). If more time than the timeout has elapsed, the interrupt is
3868 treated as a timeout.
3870 5. Some internal re-factoring in preparation for the addition of Sieve
3871 extensions (by MH). In particular, the "personal" test is moved to a
3872 separate function, and given an option for scanning Cc: and Bcc: (which is
3873 not set for Exim filters).
3875 6. When Exim created an email address using the login of the caller as the
3876 local part (e.g. when creating a From: or Sender: header line), it was not
3877 quoting the local part when it contained special characters such as @.
3879 7. Installed new OpenBSD configuration files.
3881 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3882 try to make them clearer.
3884 9. Callout options, other than the timeout value, were being ignored when
3885 verifying sender addresses in header lines. For example, when using
3887 verify = header_sender/callout=no_cache
3889 the cache was (incorrectly) being used.
3891 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3892 only the Cygwin environment.
3894 11. When return_path_on_delivery was set as a log selector, if different remote
3895 addresses in the same message used different return paths and parallel
3896 remote delivery occurred, the wrong values would sometimes be logged.
3897 (Whenever a remote delivery process finished, the return path value from
3898 the most recently started remote delivery process was logged.)
3900 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3901 lines when AUTH and/or TLS are in use. This is the "received protocol"
3902 field. Exim used to use "asmtp" for authenticated SMTP, without any
3903 indication (in the protocol name) for TLS use. Now it follows the RFC and
3904 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3905 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3906 names appear in log lines as well as in Received: header lines.
3908 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3909 extensions, and comparison tests, and to fix some bugs.
3911 14. Changes to the "personal" filter test:
3913 (1) The test was buggy in that it was just doing the equivalent of
3914 "contains" tests on header lines. For example, if a user's address was
3915 anne@some.where, the "personal" test would incorrectly be true for
3917 To: susanne@some.where
3919 This test is now done by extracting each address from the header in turn,
3920 and checking the entire address. Other tests that are part of "personal"
3921 are now done using regular expressions (for example, to check local parts
3922 of addresses in From: header lines).
3924 (2) The list of non-personal local parts in From: addresses has been
3925 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3926 taken from the Sieve specification recommendations.
3928 (3) If the message contains any header line starting with "List-" it is
3929 treated as non-personal.
3931 (4) The test for "circular" in the Subject: header line has been removed
3932 because it now seems ill-conceived.
3934 15. Minor typos in src/EDITME comments corrected.
3936 16. Installed latest exipick from John Jetmore.
3938 17. If headers_add on a router specified a text string that was too long for
3939 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
3940 of string_sprintf() is now avoided.
3942 18. $message_body_size was not set (it was always zero) when running the DATA
3943 ACL and the local_scan() function.
3945 19. For the "mail" command in an Exim filter, no default was being set for
3946 the once_repeat time, causing a random time value to be used if "once" was
3947 specified. (If the value happened to be <= 0, no repeat happened.) The
3948 default is now 0s, meaning "never repeat". The "vacation" command was OK
3949 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
3950 (I found it when inspecting the code).
3952 20. There is now an overall timeout for performing a callout verification. It
3953 defaults to 4 times the callout timeout, which applies to individual SMTP
3954 commands during the callout. The overall timeout applies when there is more
3955 than one host that can be tried. The timeout is checked before trying the
3956 next host. This prevents very long delays if there are a large number of
3957 hosts and all are timing out (e.g. when the network connections are timing
3958 out). The value of the overall timeout can be changed by specifying an
3959 additional sub-option for "callout", called "maxwait". For example:
3961 verify = sender/callout=5s,maxwait=20s
3963 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3964 to the end before writing, but this should make it even safer).
3966 22. Exim was forgetting that it had advertised PIPELINING for the second and
3967 subsequent messages on an SMTP connection. It was also not resetting its
3968 memory on STARTTLS and an internal HELO.
3970 23. When Exim logs an SMTP synchronization error within a session, it now
3971 records whether PIPELINING has been advertised or not.
3973 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3974 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3975 rather than long int.
3977 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3979 26. Added the never_mail option to autoreply.
3985 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3986 crash if the getsockname() call failed; this can happen if a connection is
3987 closed very soon after it is established. The problem was simply in the
3988 order in which certain operations were done, causing Exim to try to write
3989 to the SMTP stream before it had set up the file descriptor. The bug has
3990 been fixed by making things happen in the correct order.
3996 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3997 before the connection was closed, thus losing the rejection response.
3999 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4000 some early Solaris releases, but causes trouble in current releases where
4001 socklen_t is defined.
4003 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4006 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4009 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4010 that releasing the top of it at the end releases what was used for sub-
4011 expansions (unless the block got too big). However, discard this block if
4012 the first thing is a variable or header, so that we can use its block when
4013 it is dynamic (useful for very large $message_headers, for example).
4015 6. Lookups now cache *every* query, not just the most recent. A new, separate
4016 store pool is used for this. It can be recovered when all lookup caches are
4017 flushed. Lookups now release memory at the end of their result strings.
4018 This has involved some general refactoring of the lookup sources.
4020 7. Some code has been added to the store_xxx() functions to reduce the amount
4021 of flapping under certain conditions.
4023 8. log_incoming_interface used to affect only the <= reception log lines. Now
4024 it causes the local interface and port to be added to several more SMTP log
4025 lines, for example "SMTP connection from", and rejection lines.
4027 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4029 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4031 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4032 could be overwritten at the end of the current message (or the start of a
4033 new message if it was set in a HELO ACL). The value is now preserved for
4034 the duration of the SMTP connection.
4036 12. If a transport had a headers_rewrite setting, and a matching header line
4037 contained an unqualified address, that address was qualified, even if it
4038 did not match any rewriting rules. The underlying bug was that the values
4039 of the flags that permit the existence of unqualified sender and recipient
4040 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4041 non-local messages, and by -bnq for local messages) were not being
4042 preserved with the message after it was received.
4044 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4045 "next input=" as part of the text comprising the host identity instead of
4046 the correct text. The code was using the same buffer for two different
4047 strings. However, depending on which order the printing function evaluated
4048 its arguments, the bug did not always show up. Under Linux, for example, my
4049 test suite worked just fine.
4051 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4052 doesn't work with some older versions of Perl. It has been changed to "my",
4053 which in any case is probably the better facility to use.
4055 15. A really picky compiler found some instances of statements for creating
4056 error messages that either had too many or two few arguments for the format
4059 16. The size of the buffer for calls to the DNS resolver has been increased
4060 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4061 for addresses that have a lot of PTR records. This alleviates a problem; it
4062 does not fully solve it.
4064 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4065 buffer now truncates the list and logs the incident, which is the same
4066 action as happens when Exim is looking up a host name and its aliases.
4067 Previously in this situation something unpredictable would happen;
4068 sometimes it was "internal error: store_reset failed".
4070 18. If a server dropped the connection unexpectedly when an Exim client was
4071 using GnuTLS and trying to read a response, the client delivery process
4072 crashed while trying to generate an error log message.
4074 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4075 string, for example:
4077 warn message = H1: something\nH2: something
4079 the text was added as a single header line from Exim's point of view
4080 though it ended up OK in the delivered message. However, searching for the
4081 second and subsequent header lines using $h_h2: did not work. This has been
4082 fixed. Similarly, if a system filter added multiple headers in this way,
4083 the routers could not see them.
4085 20. Expanded the error message when iplsearch is called with an invalid key to
4086 suggest using net-iplsearch in a host list.
4088 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4089 ACLs are no longer actually imposed (and a message to that effect is
4092 22. If a "gecos" field in a passwd entry contained escaped characters, in
4093 particular, if it contained a \" sequence, Exim got it wrong when building
4094 a From: or a Sender: header from that name. A second bug also caused
4095 incorrect handling when an unquoted " was present following a character
4096 that needed quoting.
4098 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4099 was not being matched caselessly.
4101 24. Arranged for all hyphens in the exim.8 source to be escaped with
4104 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4105 properly. Recipient callout cache records were still being keyed to include
4106 the sender, even when use_sender was set false. This led to far more
4107 callouts that were necessary. The sender is no longer included in the key
4108 when use_sender is false.
4110 26. Added "control = submission" modifier to ACLs.
4112 27. Added the ${base62d: operator to decode base 62 numbers.
4114 28. dnsdb lookups can now access SRV records.
4116 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4117 the configuration file.
4119 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4120 (-v) mode. This makes the output for a verbose queue run more intelligible.
4122 31. Added a use_postmaster feature to recipient callouts.
4124 32. Added the $body_zerocount variable, containing the number of binary zero
4125 bytes in the message body.
4127 33. The time of last modification of the "new" subdirectory is now used as the
4128 "mailbox time last read" when there is a quota error for a maildir
4131 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4133 35. Added +ignore_unknown as a special item in host lists.
4135 36. Code for decoding IPv6 addresses in host lists is now included, even if
4136 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4137 address was recognized as an IP address, but was then not correctly decoded
4138 into binary, causing unexpected and incorrect effects when compared with
4145 1. Very minor rewording of debugging text in manualroute to say "list of
4146 hosts" instead of "hostlist".
4148 2. If verify=header_syntax was set, and a header line with an unqualified
4149 address (no domain) and a large number of spaces between the end of the
4150 name and the colon was received, the reception process suffered a buffer
4151 overflow, and (when I tested it) crashed. This was caused by some obsolete
4152 code that should have been removed. The fix is to remove it!
4154 3. When running in the test harness, delay a bit after writing a bounce
4155 message to get a bit more predictability in the log output.
4157 4. Added a call to search_tidyup() just before forking a reception process. In
4158 theory, someone could use a lookup in the expansion of smtp_accept_max_
4159 per_host which, without the tidyup, could leave open a database connection.
4161 5. Added the variables $recipient_data and $sender_data which get set from a
4162 lookup success in an ACL "recipients" or "senders" condition, or a router
4163 "senders" option, similar to $domain_data and $local_part_data.
4165 6. Moved the writing of debug_print from before to after the "senders" test
4168 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4169 problems for message scanning, either using a data ACL, or using
4170 local_scan() because the Received: header was not generated till after they
4171 were called (in order to set the time as the time of reception completion).
4172 I have revised the way this works. The header is now generated after the
4173 body is received, but before the ACL or local_scan() are called. After they
4174 are run, the timestamp in the header is updated.
4180 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4181 before starting a queue runner without re-exec. This happened only when
4182 deliver_drop_privilege was set or when the Exim user was set to root. The
4183 effect of the bug was that timeouts during subsequent deliveries caused
4184 crashes instead of being properly handled. The handler is now left at its
4185 default (and expected) setting.
4187 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4188 message, again when deliver_drop_privilege is set or Exim is run as root.
4189 The bug described in (1) was not present in this case, but the tidying up
4190 of the other signals was missing. I have made the two cases consistent.
4192 3. The ignore_target_hosts setting on a manualroute router was being ignored
4193 for hosts that were looked up using the /MX notation.
4195 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4198 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4199 operated on the sender address. After changing the $sender_address to <>
4200 for the sender address verify, Exim was re-instated it as the original
4201 (before rewriting) address, but remembering that it had rewritten it, so it
4202 wasn't rewriting it again. This bug also had the effect of breaking the
4203 sender address verification caching when the sender address was rewritten.
4205 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4206 This has been changed so that if the ip literal address matches
4207 ignore_target_hosts, the router declines.
4209 7. Added expansion conditions match_domain, match_address, and match_local_
4210 part (NOT match_host).
4212 8. The placeholder for the Received: header didn't have a length field set.
4214 9. Added code to Exim itself and to exim_lock to test for a specific race
4215 condition that could lead to file corruption when using MBX delivery. The
4216 issue is with the lockfile that is created in /tmp. If this file is removed
4217 after a process has opened it but before that process has acquired a lock,
4218 there is the potential for a second process to recreate the file and also
4219 acquire a lock. This could lead to two Exim processes writing to the file
4220 at the same time. The added code performs the same test as UW imapd; it
4221 checks after acquiring the lock that its file descriptor still refers to
4222 the same named file.
4224 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4225 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4228 11. Added the smtp_active_hostname option. If used, this will typically be made
4229 to depend on the incoming interface address. Because $interface_address is
4230 not set up until the daemon has forked a reception process, error responses
4231 that can happen earlier (such as "too many connections") no longer contain
4234 12. If an expansion in a condition on a "warn" statement fails because a lookup
4235 defers, the "warn" statement is abandoned, and the next ACL statement is
4236 processed. Previously this caused the whole ACL to be aborted.
4238 13. Added the iplsearch lookup type.
4240 14. Added ident_timeout as a log selector.
4242 15. Added tls_certificate_verified as a log selector.
4244 16. Added a global option tls_require_ciphers (compare the smtp transport
4245 option of the same name). This controls incoming TLS connections.
4247 17. I finally figured out how to make tls_require_ciphers do a similar thing
4248 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4249 before starting the TLS session.
4251 18. Tabs are now shown as \t in -bP output.
4253 19. If the log selector return_path_on_delivery was set, Exim crashed when
4254 bouncing a message because it had too many Received: header lines.
4256 20. If two routers both had headers_remove settings, and the first one included
4257 a superfluous trailing colon, the final name in the first list and the
4258 first name in the second list were incorrectly joined into one item (with a
4259 colon in the middle).
4265 1. Added -C and -D options to the exinext utility, mainly to make it easier
4266 to include in the automated testing, but these could be helpful when
4267 multiple configurations are in use.
4269 2. The exinext utility was not formatting the output nicely when there was
4270 an alternate port involved in the retry record key, nor when there was a
4271 message id as well (for retries that were specific to a specific message
4272 and a specific host). It was also confused by IPv6 addresses, because of
4273 the additional colons they contain. I have fixed the IPv4 problem, and
4274 patched it up to do a reasonable job for IPv6.
4276 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4277 delivery, the log line now contains "pipelined" if PIPELINING was used.
4279 4. An SMTP transport process used to panic and die if the bind() call to set
4280 an explicit outgoing interface failed. This has been changed; it is now
4281 treated in the same way as a connect() failure.
4283 5. A reference to $sender_host_name in the part of a conditional expansion
4284 that was being skipped was still causing a DNS lookup. This no longer
4287 6. The def: expansion condition was not recognizing references to header lines
4288 that used bh_ and bheader_.
4290 7. Added the _cache feature to named lists.
4292 8. The code for checking quota_filecount in the appendfile transport was
4293 allowing one more file than it should have been.
4295 9. For compatibility with Sendmail, the command line option
4303 and sets the incoming protocol and host name (for trusted callers). The
4304 host name and its colon can be omitted when only the protocol is to be set.
4305 Note the Exim already has two private options, -pd and -ps, that refer to
4306 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4307 "s", but I don't think that's a major issue.
4309 10. A number of refactoring changes to the code, none of which should affect
4312 (a) The number of logging options was getting close to filling up the
4313 32-bit word that was used as a bit map. I have split them into two classes:
4314 those that are passed in the argument to log_write(), and those that are
4315 only ever tested independently outside of that function. These are now in
4316 separate 32-bit words, so there is plenty of room for expansion again.
4317 There is no change in the user interface or the logging behaviour.
4319 (b) When building, for example, log lines, the code previously used a
4320 macro that called string_cat() twice, in order to add two strings. This is
4321 not really sufficiently general. Furthermore, there was one instance where
4322 it was actually wrong because one of the argument was used twice, and in
4323 one call a function was used. (As it happened, calling the function twice
4324 did not affect the overall behaviour.) The macro has been replaced by a
4325 function that can join an arbitrary number of extra strings onto a growing
4328 (c) The code for expansion conditions now uses a table and a binary chop
4329 instead of a serial search (which was left over from when there were very
4330 few conditions). Also, it now recognizes conditions like "pam" even when
4331 the relevant support is not compiled in: a suitably worded error message is
4332 given if an attempt is made to use such a condition.
4334 11. Added ${time_interval:xxxxx}.
4336 12. A bug was causing one of the ddress fields not to be passed back correctly
4337 from remote delivery subprocesses. The field in question was not being
4338 subsequently used, so this caused to problems in practice.
4340 13. Added new log selectors queue_time and deliver_time.
4342 14. Might have fixed a bug in maildirsizefile handling that threw up
4343 "unexpected character" debug warnings, and recalculated the data
4344 unnecessarily. In any case, I expanded the warning message to give more
4347 15. Added the message "Restricted characters in address" to the statements in
4348 the default ACL that block characters like @ and % in local parts.
4350 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4351 Three changes have been made:
4353 (a) There was a serious bug; a negative response to MAIL caused the whole
4354 recipient domain to be cached as invalid, thereby blocking all messages
4355 to all local parts at the same domain, from all senders. This bug has
4356 been fixed. The domain is no longer cached after a negative response to
4357 MAIL if the sender used is not empty.
4359 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4362 (c) A new callout option, "use_sender" has been added for people who want
4363 the modified behaviour.
4369 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4372 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4373 indeed breaks things for older releases.
4375 3. Added additional logging to the case where there is a problem reading data
4376 from a filter that is running in a subprocess using a pipe, in order to
4377 try to track down a specific problem.
4379 4. Testing facility fudge: when running in the test harness and attempting
4380 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4381 getting "No route to host". Convert this to a timeout.
4383 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4386 6. Some OS don't have socklen_t but use size_t instead. This affects the
4387 fifth argument of getsockopt() amongst other things. This is now
4388 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4389 can be set for individual OS. I have set it for SunOS5, OSF1, and
4390 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4391 some earlier ones do not.
4393 7. Change 4.30/15 was not doing the test caselessly.
4395 8. The standard form for an IPv6 address literal was being rejected by address
4396 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4397 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4398 this, as well as the form without the "IPv6" on the front (but only when
4399 address literals are enabled, of course).
4401 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4403 10. Exim crashed if a message with an empty sender address specified by -f
4404 encountered a router with an errors_to setting. This could be provoked only
4405 by a command such as
4409 where an empty string was supplied; "<>" did not hit this bug.
4411 11. Installed PCRE release 4.5.
4413 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4414 remained set. It is now erased.
4416 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4417 times from message ids (which are base 36 rather than the normal 62).
4419 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4420 were being counted as actual protocol errors, and logged if the log
4421 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4422 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4423 and DATA following a set of rejected RCPTs do not count as protocol errors.
4424 In other words, Exim assumes they were pipelined, though this may not
4425 actually be the case. Of course, in all cases the client gets an
4426 appropriate error code.
4428 15. If a lookup fails in an ACL condition, a message about the failure may
4429 be available; it is used if testing the ACL cannot continue, because most
4430 such messages specify what the cause of the deferral is. However, some
4431 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4432 that caused an old message to be retained and used if a later statement
4433 caused a defer, replacing the real cause of the deferral.
4435 16. If an IP address had so many PTR records that the DNS lookup buffer
4436 was not large enough to hold them, Exim could crash while trying to process
4437 the truncated data. It now detects and logs this case.
4439 17. Further to 4.21/58, another change has been made: if (and only if) the
4440 first line of a message (the first header line) ends with CRLF, a bare LF
4441 in a subsequent header line has a space inserted after it, so as not to
4442 terminate the header.
4444 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4445 unnecessarily, used atoi() instead of strtol(), and didn't check the
4446 termination when getting file sizes from file names by regex.
4448 19. Completely re-implemented the support for maildirsize files, in the light
4449 of a number of problems with the previous contributed implementation
4450 (4.30/29). In particular:
4452 . If the quota is zero, the maildirsize file is maintained, but no quota is
4455 . If the maildir directory does not exist, it is created before any attempt
4456 to write a maildirsize file.
4458 . The quota value in the file is just a cache; if the quota is changed in
4459 the transport, the new value overrides.
4461 . A regular expression is available for excluding directories from the
4464 20. The autoreply transport checks the characters in options that define the
4465 message's headers; it allows continued headers, but it was checking with
4466 isspace() after an embedded newline instead of explicitly looking for a
4469 21. If all the "regular" hosts to which an address was routed had passed their
4470 expiry times, and had not reached their retry times, the address was
4471 bounced, even if fallback hosts were defined. Now Exim should go on to try
4474 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4475 equivalent code in the SMTP transport. Some hosts send humungous responses
4476 to HELO/EHLO, more than 1024 it seems.
4478 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4479 gives compiler warnings in some environments. I've now done it "properly",
4482 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4483 (because of problems with the built-in one) was declared to return uschar *
4484 instead of char *, causing compiler failure.
4486 25. Fixed a file descriptor leak when processing alias/forward files.
4488 26. Fixed a minor format string issue in dbfn.c.
4490 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4492 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4493 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4496 29. When a sender address is verified, it is cached, to save repeating the test
4497 when there is more than one recipient in a message. However, when the
4498 verification involves a callout, it is possible for different callout
4499 options to be set for different recipients. It is too complicated to keep
4500 track of this in the cache, so now Exim always runs a verification when a
4501 callout is required, relying on the callout cache for the optimization.
4502 The overhead is duplication of the address routing, but this should not be
4505 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4506 to be verified with callout=postmaster, and the main callout worked but the
4507 postmaster check failed, the verification correctly failed. However, if a
4508 subsequent RCPT command asked for sender verification *without* the
4509 postmaster check, incorrect caching caused this verification also to fail,
4512 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4513 it was not caching the DNS options (qualify_single, search_parents) that
4514 were used when the lookup failed. A subsequent lookup with different
4515 options therefore always gave the same answer, though there were cases
4516 where it should not have. (Example: a "domains = !$mx_any" option on a
4517 dnslookup router: the "domains" option is always processed without any
4518 widening, but the router might have qualify_single set.) Now Exim uses the
4519 cached value only when the same options are set.
4521 32. Added John Jetmore's "exipick" utility to the distribution.
4523 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4524 than a timeout (e.g. a certificate is required, and is not provided), an
4525 Exim server now closes the connection immediately. Previously it waited for
4526 the client to close - but if the client is SSL, it seems that they each
4527 wait for each other, leading to a delay before one of them times out.
4529 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4530 maintained 0.8.x compatibility because I don't think many are using it, and
4531 it is clearly obsolete.
4533 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4536 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4537 client certificate was expired. A simple patch fixes this, though I don't
4538 understand the full logic of why the verify callback is called multiple
4541 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4542 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4543 which causes problems with some clients (such as the Certicom SSL Plus
4544 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4545 disables the coutermeasure allowing Eudora to connect."
4547 38. Exim was not checking that a write() to a log file succeeded. This could
4548 lead to Bad Things if a log got too big, in particular if it hit a file
4549 size limit. Exim now panics and dies if it cannot write to a log file, just
4550 as it does if it cannot open a log file.
4552 39. Modified OS/Makefile-Linux so that it now contains
4554 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4556 The two -D definitions ensure that Exim is compiled with large file
4557 support, which makes it possible to handle log files that are bigger than
4560 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4561 instance) a domain was checked against a named list that involved a lookup,
4562 causing $domain_data to be set, then another domain was checked against the
4563 same list, then the first domain was re-checked, the value of $domain_data
4564 after the final check could be wrong. In particular, if the second check
4565 failed, it could be set empty. This bug probably also applied to
4568 41. The strip_trailing_dot option was not being applied to the address given
4569 with the -f command-line option.
4571 42. The code for reading a message's header from the spool was incrementing
4572 $received_count, but never initializing it. This meant that the value was
4573 incorrect (doubled) while delivering a message in the same process in which
4574 it was received. In the most common configuration of Exim, this never
4575 happens - a fresh exec is done - but it can happen when
4576 deliver_drop_privilege is set.
4578 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4579 it now includes up to 150 characters of the unexpected data in the log
4582 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4583 and building data strings. The size of both of these buffers was 10 000
4584 bytes - far larger than anybody would *ever* want, thought I. Needless to
4585 say, somebody hit the limit. I have increased the maximum line length to
4586 20 000 and the maximum data length of concatenated lines to 100 000. I have
4587 also fixed two bugs, because there was no checking on these buffers. Tsk,
4588 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4589 buffer is too small.
4591 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4592 lsearch lookups. Now it does.
4594 46. When parsing a route_list item in a manualroute router, a fixed-length
4595 buffer was used for the list of hosts. I made this 1024 bytes long,
4596 thinking that nobody would ever have a list of hosts that long. Wrong.
4597 Somebody had a whole pile of complicated expansion conditions, and the
4598 string was silently truncated, leading to an expansion error. It turns out
4599 that it is easier to change to an unlimited length (owing to other changes
4600 that have happened since this code was originally written) than to build
4601 structure for giving a limitation error. The length of the item that
4602 expands into the list of hosts is now unlimited.
4604 47. The lsearch lookup could not handle data where the length of text line was
4605 more than 4095 characters. Such lines were truncated, leading to shortened
4606 data being returned. It should now handle lines of any length.
4608 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4609 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4612 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4613 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4614 no longer happens in comment lines. A list of replacements is now placed
4615 at the head of all of the source files, except those whose only change is
4616 to replace PERL_COMMAND in the very first #! line.
4618 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4619 messages on the queue, with a bottom-up merge sort, using code contributed
4620 by Michael Haardt. This should make operations like -bp somewhat faster on
4621 large queues. It won't affect queue runners, except when queue_run_in_order
4624 51. Installed eximstats 1.31 in the distribution.
4626 52. Added support for SRV lookups to the dnslookup router.
4628 53. If an ACL referred to $message_body or $message_body_end, the value was not
4629 reset for any messages that followed in the same SMTP session.
4631 54. The store-handling optimization for building very long strings was not
4632 differentiating between the different store pools. I don't think this
4633 actually made any difference in practice, but I've tidied it.
4635 55. While running the routers to verify a sender address, $sender_address
4636 was still set to the sender address. This is wrong, because when routing to
4637 send a bounce to the sender, it would be empty. Therefore, I have changed
4638 it so that, while verifying a sender address, $sender_address is set to <>.
4639 (There is no change to what happens when verifying a recipient address.)
4641 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4642 target A or AAAA records (if not already returned) without resetting the
4643 qualify_single or search_parents options of the DNS resolver. These are
4644 inappropriate in this case because the targets of MX and SRV records must
4645 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4646 target that, when qualified, matched something in the local domain. These
4647 two options are now turned off when doing these lookups.
4649 57. It seems that at least some releases of Reiserfs (which does not have the
4650 concept of a fixed number of inodes) returns zero and not -1 for the
4651 number of available inodes. This interacted badly with check_spool_inodes,
4652 which assumed that -1 was the "no such thing" setting. What I have done is
4653 to check that the total number of inodes is greater than zero before doing
4654 the test of how many are available.
4656 58. When a "warn" ACL statement has a log_message modifier, the message is
4657 remembered, and not repeated. This is to avoid a lot of repetition when a
4658 message has many recipients that cause the same warning to be written.
4659 Howewer, Exim was preserving the list of already written lines for an
4660 entire SMTP session, which doesn't seem right. The memory is now reset if a
4661 new message is started.
4663 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4664 debugging output unless log_rewrite was also set.
4666 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4667 of (int)(handle) when we know that handle contains (void *)(-1).
4669 61. The Exim daemon panic-logs an error return when it closes the incoming
4670 connection. However "connection reset by peer" seems to be common, and
4671 isn't really an error worthy of noting specially, so that particular error
4674 62. When Exim is trying to find all the local interfaces, it used to panic and
4675 die if the ioctl to get the interface flags failed. However, it seems that
4676 on at least one OS (Solaris 9) it is possible to have an interface that is
4677 included in the list of interfaces, but for which you get a failure error
4678 for this call. This happens when the interface is not "plumbed" into a
4679 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4680 failure of the "get flags" call assumes that the interface is down.
4682 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4683 makes life easier for people who are doing arithmetic on fields extracted
4684 from dates, where you often get leading zeros that should not be
4685 interpreted as octal.
4687 64. Added qualify_domain to the redirect router, to override the global
4690 65. If a pathologically long header line contained very many addresses (the
4691 report of this problem mentioned 10 000) and each of them was rewritten,
4692 Exim could use up a very large amount of memory. (It kept on making new
4693 copies of the header line as it rewrote, and never released the old ones.)
4694 At the expense of a bit more processing, the header rewriting function has
4695 been changed so that it no longer eats memory in this way.
4697 66. The generation of the Received: header has been moved from the time that a
4698 message starts to be received, to the time that it finishes. The timestamp
4699 in the Received: header should now be very close to that of the <= log
4700 line. There are two side-effects of this change:
4702 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4703 logged header lines no longer include the local Received: line, because
4704 it has not yet been created. The same applies to a copy of the message
4705 that is returned to a non-SMTP sender when a message is rejected.
4707 (b) When a filter file is tested using -bf, no additional Received: header
4708 is added to the test message. After some thought, I decided that this
4711 This change does not affect the value of $received_for. It is still set
4712 after address rewriting, but before local_scan() is called.
4714 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4716 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4717 gave an unhelpful panic error message, and a defer error. I have managed to
4718 change this behaviour so that it now rejects any supplied certificate,
4719 which seems right, as the list of acceptable certificates is empty.
4721 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4722 gave an unhelpful defer error. I have not managed to make this reject any
4723 supplied certificates, but the error message it gives is "no certificate
4724 supplied", which is not helpful.
4726 70. exigrep's output now also includes lines that are not associated with any
4727 message, but which match the given pattern. Implemented by a patch from
4728 Martin Sluka, which also tidied up the Perl a bit.
4730 71. Recipient callout verification, like sender verification, was using <> in
4731 the MAIL FROM command. This isn't really the right thing, since the actual
4732 sender may affect whether the remote host accepts the recipient or not. I
4733 have changed it to use the actual sender in the callout; this means that
4734 the cache record is now keyed on a recipient/sender pair, not just the
4735 recipient address. There doesn't seem to be a real danger of callout loops,
4736 since a callout by the remote host to check the sender would use <>.
4737 [SEE ABOVE: changed after hitting problems.]
4739 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4740 temporary errors. However, in the case of such a code being given after
4741 the end of a data transmission (i.e. after ".") Exim was failing to write
4742 a retry record for the message. (Yes, there was some broken host that was
4743 actually sending 8xx at this point.)
4745 73. An unknown lookup type in a host list could cause Exim to panic-die when
4746 the list was checked. (An example that provoked this was putting <; in the
4747 middle of a list instead of at the start.) If this happened during a DATA
4748 ACL check, a -D file could be left lying around. This kind of configuration
4749 error no longer causes Exim to die; instead it causes a defer errror. The
4750 incident is still logged to the main and panic logs.
4752 74. Buglet left over from Exim 3 conversion. The message "too many messages
4753 in one connection" was written to the rejectlog but not the mainlog, except
4754 when address rewriting (yes!) was being logged.
4756 75. Added write_rejectlog option.
4758 76. When a system filter was run not as root (that is, when system_filter_user
4759 was set), the values of the $n variables were not being returned to the
4760 main process; thus, they were not subsequently available in the $sn
4763 77. Added +return_path_on_delivery log selector.
4765 78. A connection timeout was being treated differently from recipients deferred
4766 when testing hosts_max_try with a message that was older than the host's
4767 retry timeout. (The host should not be counted, thus allowing all hosts to
4768 be tried at least once before bouncing.) This may have been the cause of an
4769 occasionally reported bug whereby a message would remain on the queue
4770 longer than the retry timeout, but would be bounced if a delivery was
4771 forced. I say "may" because I never totally pinned down the problem;
4772 setting up timeout/retry tests is difficult. See also the next item.
4774 79. The ultimate address timeout was not being applied to errors that involved
4775 a combination of host plus message (for example, a timeout on a MAIL
4776 command). When an address resolved to a number of possible hosts, and they
4777 were not all tried for each delivery (e.g. because of hosts_max_try), a
4778 message could remain on the queue longer than the retry timeout.
4780 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4783 81. Fixed an obscure SMTP outgoing bug which required at least the following
4784 conditions: (a) there was another message waiting for the same server;
4785 (b) the server returned 5xx to all RCPT commands in the first message so
4786 that the message was not completed; (c) the server dropped the connection
4787 or gave a negative response to the RSET that Exim sends to abort the
4788 transaction. The observed case was a dropped connection after DATA that had
4789 been sent in pipelining mode. That is, the server had advertised PIPELINING
4790 but was not implementing it correctly. The effect of the bug was incorrect
4791 behaviour, such as trying another host, and this could lead to a crash.
4797 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4798 and daemon.c were passed as pointers to ints; they should have been
4799 pointers to socklen_t variables (which are typically unsigned ints).
4801 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4804 3. Fixed a really odd bug that affected only the testing scheme; patching a
4805 certain fixed string in the binary changed the value of another string that
4806 happened to be identical to the end of the original first string.
4808 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4809 name", it returns that address as the IP address. On some operating
4810 systems (e.g. Solaris), it also passes back the IP address string as the
4811 "host name". However, on others (e.g. Linux), it passes back an empty
4812 string. Exim wasn't checking for this, and was changing the host name to an
4813 empty string, assuming it had been canonicized.
4815 5. Although rare, it is permitted to have more than one PTR record for a given
4816 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4817 all the names associated with an address, because they do in Solaris.
4818 However, it seems that they do not in Linux for data that comes from the
4819 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4820 I found this out when I moved to a new Linux workstation and tried to run
4821 the Exim test suite.
4823 To get round this problem I have changed the code so that it now does its
4824 own call to the DNS to look up PTR records when searching for a host name.
4825 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4826 addresses that are only in /etc/hosts are still found.
4828 This behaviour is, however, controlled by an option called host_lookup_
4829 order, which defaults to "bydns:byaddr". If people want to use the other
4830 order, or indeed, just use one or the other means of lookup, they can
4831 specify it in this variable.
4833 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4834 some operating systems, this comes back from gethostbyaddr() as an empty
4835 string, and this is what Exim used to test for. However, it seems that in
4836 other systems, "." is yielded. Exim now tests for this case too.
4838 7. The values of check_spool_space and check_log_space are now held internally
4839 as a number of kilobytes instead of an absolute number of bytes. If a
4840 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4841 kilobyte. This means that much larger values can be stored.
4843 8. Exim monitor: an attempt to get the action menu when not actually pointing
4844 at a message produces an empty menu entitled "No message selected". This
4845 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4846 no entries in it ("Shell widget menu has zero width and/or height"). So I
4847 have added a single, blank menu entry in this case.
4849 9. Added ${quote_local_part.
4851 10. MIME decoding is now applied to the contents of Subject: header lines when
4854 11. Now that a reference to $sender_host_address automatically causes a reverse
4855 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4856 host lookup before query-style lookups in lists that might use this
4857 variable. This has therefore been abolished, and the "net-" prefix is no
4858 longer necessary for query-style lookups.
4860 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4861 have been a typo for LFLAGS, so it has been changed.
4863 13. The install script calls Exim with "-C /dev/null" in order to find the
4864 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4865 to be output. Howeve, since Exim outputs its version number before the
4866 error, it didn't break the script. It just looked ugly. I fixed this by
4867 always allowing "-C /dev/null" if the caller is root.
4869 14. Ignore overlarge ACL variable number when reading spool file - insurance
4870 against a later release with more variables having written the file.
4872 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4873 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4874 this, as well as the form without the "IPv6" on the front.
4876 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4877 OS/Makefile-Darwin file.
4879 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4880 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4882 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4883 variable. However, some OS use ints for inodes. I've added cast to long int
4884 to get rid of the compiler warning.
4886 19. I had forgotten to lock out "/../" in configuration file names when
4887 ALT_CONFIG_PREFIX was set.
4889 20. Routers used for verification do not need to specify transports. However,
4890 if such a router generated a host list, and callout was configured, Exim
4891 crashed, because it could not find a port number from the (non-existent)
4892 transport. It now assumes port 25 in this circumstance.
4894 21. Added the -t option to exigrep.
4896 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4897 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4898 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4899 them is set, LOOKUP_LSEARCH is forced.
4901 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4903 24. Added sender and host information to the "rejected by local_scan()" log
4904 line; previously there was no indication of these.
4906 25. Added .include_if_exists.
4908 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4909 Linux. It turns out that not all file systems support this. Apparently some
4910 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4911 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4912 not supported on the file descriptor, is now ignored when Exim is trying to
4913 sync a directory. This applies only to Linux.
4915 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4917 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4918 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4921 29. Added support for maildirsize files from supplied patch (modified a bit).
4923 30. The use of :fail: followed by an empty string could lead Exim to respond to
4924 sender verification failures with (e.g.):
4926 550 Verification failed for <xxx>
4927 550 Sender verify failed
4929 where the first response line was missing the '-' that indicates it is not
4930 the final line of the response.
4932 31. The loop for finding the name of the user that called Exim had a hardwired
4933 limit of 10; it now uses the value of finduser_retries, which is used for
4934 all other user lookups.
4936 32. Added $received_count variable, available in data and not_smtp ACLs, and at
4939 33. Exim was neglecting to zero errno before one call of strtol() when
4940 expanding a string and expecting an integer value. On some systems this
4941 resulted in spurious "integer overflow" errors. Also, it was casting the
4942 result into an int without checking.
4944 34. Testing for a connection timeout using "timeout_connect" in the retry rules
4945 did not work. The code looks as if it has *never* worked, though it appears
4946 to have been documented since at least releast 1.62. I have made it work.
4948 35. The "timeout_DNS" error in retry rules, also documented since at least
4949 1.62, also never worked. As it isn't clear exactly what this means, and
4950 clearly it isn't a major issue, I have abolished the feature by treating it
4951 as "timeout", and writing a warning to the main and panic logs.
4953 36. The display of retry rules for -brt wasn't always showing the error code
4956 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4957 timeout_connect_A, timeout_connect_MX.
4959 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4960 to the empty sender.
4962 39. The daemon was not analysing the content of -oX till after it had closed
4963 stderr and disconnected from the controlling terminal. This meant that any
4964 syntax errors were only noted on the panic log, and the return code from
4965 the command was 0. By re-arranging the code a little, I've made the
4966 decoding happen first, so such errors now appear on stderr, and the return
4967 code is 1. However, the actual setting up of the sockets still happens in
4968 the disconnected process, so errors there are still only recorded on the
4971 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4972 connections (as happens on some IP stacks) was logged at start up time as
4973 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4974 it from "IPv6 and IPv4", which means that two separate sockets are being
4977 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4978 says whether AF_INET or AF_INET6 was passed as an argument.
4980 42. Exiwhat output was messed up when time zones were included in log
4983 43. Exiwhat now gives more information about the daemon's listening ports,
4984 and whether -tls-on-connect was used.
4986 44. The "port" option of the smtp transport is now expanded.
4988 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4989 silently ignored. Now an error message is written to the main and panic
4992 46. There's a new ACL modifier called "logwrite" which writes to a log file
4993 as soon as it is encountered.
4995 47. Added $local_user_uid and $local_user_gid at routing time.
4997 48. Exim crashed when trying to verify a sender address that was being
5000 49. Exim was recognizing only a space character after ".include". It now also
5001 recognizes a tab character.
5003 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5004 extracting the relevant information from the specification. The man page no
5005 longer contains scrambled data for the -d option, and I've added a section
5006 at the front about calling Exim under different names.
5008 51. Added "extra_headers" argument to the "mail" command in filter files.
5010 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5013 53. Installed eximstats 1.29.
5015 54. Added transport_filter_timeout as a generic transport option.
5017 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5018 Cc: header lines. This was required by RFC 822, but it not required by RFC
5021 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5022 incoming messages that did not have them. Now it does so only if the
5023 message originates locally, that is, if there is no associated remote host
5024 address. When Resent- header lines are present, this applies to the Resent-
5025 lines rather than the non-Resent- lines.
5027 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5028 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5030 58. Messages for configuration errors now include the name of the main
5031 configuration file - useful now that there may be more than one file in a
5032 list (.included file names were always shown).
5034 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5035 for those rare installations that do not start the daemon as root or run it
5036 setuid root. I've cut out the call to initgroups() if the daemon is not
5039 60. The Exim user and group can now be bound into the binary as text strings
5040 that are looked up at the start of Exim's processing.
5042 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5044 62. Added $mailstore_basename variable.
5046 63. Installed patch to sieve.c from Michael Haardt.
5048 64. When Exim failed to open the panic log after failing to open the main log,
5049 the original message it was trying to log was written to stderr and debug
5050 output, but if they were not available (the usual case in production), it
5051 was lost. Now it is written to syslog before the two lines that record the
5052 failures to open the logs.
5054 65. Users' Exim filters run in subprocesses under the user's uid. It is
5055 possible for a "deliver" command or an alias in a "personal" command to
5056 provoke an address rewrite. If logging of address rewriting is configured,
5057 this fails because the process is not running as root or exim. There may be
5058 a better way of dealing with this, but for the moment (because 4.30 needs
5059 to be released), I have disabled address rewrite logging when running a
5060 filter in a non-root, non-exim process.
5066 1. The buildconfig auxiliary program wasn't quoting the value set for
5067 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5068 not defined. This bug was masked in 4.22 by the effect that was fixed in
5071 2. Some messages that were rejected after a message id was allocated were
5072 shown as "incomplete" by exigrep. It no longer does this for messages that
5073 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5075 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5076 have allow_domain_literals set, the ID did not get logged in the <= line.
5077 Domain literals are now always recognized in Message-ID: header lines.
5079 4. The first argument for a ${extract expansion item is the key name or field
5080 number. Leading and trailing spaces in this item were not being ignored,
5081 causing some misleading effects.
5083 5. When deliver_drop_privilege was set, single queue runner processes started
5084 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5085 same command in the process it spins off) were not dropping privilege.
5087 6. When the daemon running as "exim" started a queue runner, it always
5088 re-executed Exim in the spun-off process. This is a waste of effort when
5089 deliver_drop_privilege is set. The new process now just calls the
5090 queue-runner function directly.
5096 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5099 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5100 ignored. Though the use of -oP was forcing the writing of a pid file, it
5101 was always written to the default place.
5103 3. If the message "no IP address found for host xxxx" is generated during
5104 incoming verification, it is now followed by identification of the incoming
5105 connection (so you can more easily find what provoked it).
5107 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5109 5. Added some features to "harden" Exim a bit more against certain attacks:
5111 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5112 be put in Local/Makefile. This is like the never_users runtime option,
5113 but it cannot be overridden. The default setting is "root".
5115 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5116 prefix string with which any file named in a -C command line option
5119 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5120 is retained for -C and -D only if the caller of Exim is root. Without
5121 it, the exim user may also use -C and -D and retain privilege.
5123 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5124 command line option is disabled.
5126 6. Macro names set by the -D option must start with an upper case letter, just
5127 like macro names defined in the configuration file.
5129 7. Added "dereference=" facility to LDAP.
5131 8. Two instances of the typo "uknown" in the source files are fixed.
5133 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5134 the Configure-Makefile script screwed up while processing it.
5136 10. Incorporated PCRE 4.4.
5138 11. The SMTP synchronization check was not operating right at the start of an
5139 SMTP session. For example, it could not catch a HELO sent before the client
5140 waited for the greeting. There is now a check for outstanding input at the
5141 point when the greeting is written. Because of the duplex, asynchronous
5142 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5143 way, but not yet received, when the check is performed.
5145 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5146 on TCP/IP sockets, because this apparently causes some broken clients to
5149 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5150 unchanged) from the Cygwin maintainer.
5152 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5153 was supported instead of testing for mbx. Effectively a typo.
5155 15. The spa authenticator server code was not checking that the input it
5156 received was valid base64.
5158 16. The debug output line for the "set" modifier in ACLs was not showing the
5159 name of the variable that was being set.
5161 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5163 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5164 lookup on its own. Something else was needed to trigger the lookup. For
5165 example, a match in host_lookup or the need for a host name in a host list.
5166 Now, if $sender_host_name is referenced and the host name has not yet been
5167 looked up, a lookup is performed. If the lookup fails, the variable remains
5168 empty, and $host_lookup_failed is set to "1".
5170 19. Added "eqi" as a case-independent comparison operator.
5172 20. The saslauthd authentication condition could segfault if neither service
5173 nor realm was specified.
5175 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5176 error message that was logged was misleading, and incoming SMTP
5177 connections were dropped. The message is now more accurate, and temporary
5178 errors are given to SMTP connections.
5180 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5181 (except RSET) with a 421 error, until QUIT is received. However, it was
5182 failing to send a response to QUIT.
5184 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5185 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5186 ACL is now run after the helo_try_verify_hosts code.
5188 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5189 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5190 case-independent, so other case variants are also recognized). Apparently
5191 some systems use these upper case variants.
5193 25. If more than two messages were waiting for the same host, and a transport
5194 filter was specified for the transport, Exim sent two messages over the
5195 same TCP/IP connection, and then failed with "socket operation on non-
5196 socket" when it tried to send the third.
5198 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5200 27. The extern definition of crypt16() in expand.c was not being excluded when
5201 the OS had its own crypt16() function.
5203 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5204 as a preferred synonym for return_size_limit, both as an option and as an
5207 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5209 30. Changed the default configuration ACL to relax the local part checking rule
5210 for addresses that are not in any local domains. For these addresses,
5211 slashes and pipe symbols are allowed within local parts, but the sequence
5212 /../ is explicitly forbidden.
5214 31. SPA server authentication was not clearing the challenge buffer before
5217 32. log_message in a "warn" ACL statement was writing to the reject log as
5218 well as to the main log, which contradicts the documentation and doesn't
5219 seem right (because no rejection is happening). So I have stopped it.
5221 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5222 However, I am unable to do any testing of this.
5224 34. Fixed an infelicity in the appendfile transport. When checking directories
5225 for a mailbox, to see if any needed to be created, it was accidentally
5226 using path names with one or more superfluous leading slashes; tracing
5227 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5229 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5230 contents are added to the log line that is written for every discarded
5231 recipient. (Previously a log_message setting was ignored.)
5233 36. The ${quote: operator now quotes the string if it is empty.
5235 37. The install script runs exim in order to find its version number. If for
5236 some reason other than non-existence or emptiness, which it checks, it
5237 could not run './exim', it was installing it with an empty version number,
5238 i.e. as "exim-". This error state is now caught, and the installation is
5241 38. An argument was missing from the function that creates an error message
5242 when Exim fails to connect to the socket for saslauthd authentication.
5243 This could cause Exim to crash, or give a corrupted message.
5245 39. Added isip, isip4, and isip6 to ${if conditions.
5247 40. The ACL variables $acl_xx are now saved with the message, and can be
5248 accessed later in routers, transports, and filters.
5250 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5251 strings in the file are not string-expanded.
5253 42. If a MAIL command specified a SIZE value that was too large to fit into an
5254 int variable, the check against message_size_limit failed. Such values are
5255 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5256 day this will have to be increased, but I don't think I want to be around
5257 when emails are that large.
5264 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5265 iconv() is not standard in FreeBSD.
5267 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5268 IPv6 enabled. The observed symptom was a segmentation fault on return from
5269 the function os_common_find_running_interfaces() in src/os.c.
5271 3. In the check_special_case() function in daemon.c I had used "errno" as an
5272 argument name, which causes warnings on some systems. This was basically a
5273 typo, since it was named "eno" in the comments!
5275 4. The code that waits for the clock to tick (at a resolution of some fraction
5276 of a second) so as to ensure message-id uniqueness was always waiting for
5277 at least one whole tick, when it could have waited for less. [This is
5278 almost certainly not relevant at current processor speeds, where it is
5279 unlikely to ever wait at all. But we try to future-proof.]
5281 5. The function that sleeps for a time interval that includes fractions of a
5282 second contained a race. It did not block SIGALRM between setting the
5283 timer, and suspending (a couple of lines later). If the interval was short
5284 and the sigsuspend() was delayed until after it had expired, the suspension
5285 never ended. On busy systems this could lead to processes getting stuck for
5288 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5289 process, before it forks any delivery processes. The open lookup caching
5290 mechanism meant that the open file or database connection was passed into
5291 the delivery process. The problem was that delivery processes always tidy
5292 up cached lookup data. This could cause a problem for the next delivery
5293 process started by the queue runner, because the external queue runner
5294 process does not know about the closure. So the next delivery process
5295 still has data in the lookup cache. In the case of a file lookup, there was
5296 no problem because closing a file descriptor in a subprocess doesn't affect
5297 the parent. However, if the lookup was caching a connection to a database,
5298 the connection was closed, and the second delivery process was likely to
5299 see errors such as "PGSQL: query failed: server closed the connection
5300 unexpectedly". The problem has been fixed by closing all cached lookups
5301 in a queue runner before running a delivery process.
5303 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5304 seem to have the "const" qualifier which it has on other OS. I've
5307 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5308 *of the same type* (client or server) with the same public name that an
5309 error should be diagnosed.
5311 9. When Exim looked up a host name for an IP address, but failed to find the
5312 original IP address when looking up the host name (a safety check), it
5313 output the message "<ip address> does not match any IP for NULL", which was
5314 confusing, to say the least. The bug was that the host name should have
5315 appeared instead of "NULL".
5317 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5318 user that is built into the binary, and the -C or -D options is used, root
5319 privilege is dropped before the configuration file is read. In addition,
5320 logging is switched to stderr instead of the normal log files. If the
5321 configuration then re-defines the Exim user, the unprivileged environment
5322 is probably not what is expected, so Exim logs a panic warning message (but
5325 However, if deliver_drop_privilege is set, the unprivileged state may well
5326 be exactly what is intended, so the warning has been cut out in that case,
5327 and Exim is allowed to try to write to its normal log files.
5333 1. smtp_return_error_details was not giving details for temporary sender
5334 or receiver verification errors.
5336 2. Diagnose a configuration error if two authenticators have the same public
5339 3. Exim used not to create the message log file for a message until the first
5340 delivery attempt. This could be confusing when incoming messages were held
5341 for policy or load reasons. The message log file is now created at the time
5342 the message is received, and an initial "Received" line is written to it.
5344 4. The automatically generated man page for command line options had a minor
5345 bug that caused no ill effects; however, a more serious problem was that
5346 the procedure for building the man page automatically didn't always
5347 operate. Consequently, release 4.20 contains an out-of-date version. This
5348 shouldn't happen again.
5350 5. When building Exim with embedded Perl support, the script that builds the
5351 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5352 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5354 6. The freeze_tell option was not being used for messages that were frozen on
5355 arrival, either by an ACL or by local_scan().
5357 7. Added the smtp_incomplete_transaction log selector.
5359 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5360 was accepting AUTH without a new EHLO.
5362 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5363 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5366 10. Logging of TCP/IP connections (when configured) now happens in the main
5367 daemon process instead of the child process, so that the TCP/IP connection
5368 count is more accurate (but it can never be perfect).
5370 11. The use of "drop" in a nested ACL was not being handled correctly in the
5371 outer ACL. Now, if condition failure induced by the nested "drop" causes
5372 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5373 or "require"), the connection is dropped.
5375 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5376 that yield "discard" can now be used with an "accept" or a "discard" verb,
5377 but an error is generated for any others (because I can't see a useful way
5378 to define what should happen).
5380 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5381 are now processed in the same way as lines in the Exim configuration file.
5382 In particular, continuation lines are supported.
5384 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5386 15. Added -ti meaning -t -i.
5388 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5389 domains, and warn by logging if others are found.
5391 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5392 returned from GIFCONF when Exim is trying to find the list of interfaces on
5393 a host. The code in os.c has been modified to copy each ifreq to an aligned
5394 structure in all cases.
5396 Also, in some cases, the returned ifreq's were being copied to a 'struct
5397 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5398 means the last couple of bytes of an IPv6 address could be chopped if the
5399 ifreq contained only a normal sockaddr (14 bytes storage).
5401 18. Named domain lists were not supported in the hosts_treat_as_local option.
5402 An entry such as +xxxx was not recognized, and was treated as a literal
5405 19. Ensure that header lines added by a DATA ACL are included in the reject log
5406 if the ACL subsequently rejects the message.
5408 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5409 MD5 (which is deprecated).
5411 21. When testing a filter file using -bf, Exim was writing a message when it
5412 took the sender from a "From " line in the message, but it was not doing so
5413 when it took $return_path from a Return-Path: header line. It now does.
5415 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5416 with a valid header line field name (a series of printing characters
5417 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5419 23. Changed "disc" in the source to "disk" to conform to the documentation and
5420 the book and for uniformity.
5422 24. Ignore Sendmail's -Ooption=value command line item.
5424 25. When execve() failed while trying to run a command in a pipe transport,
5425 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5426 could be confused with a return value of 69 from the command itself. This
5427 has been changed to 127, the value the shell returns if it is asked to run
5428 a non-existent command. The wording for the related log line suggests a
5429 non-existent command as the problem.
5431 26. If received_header_text expands to an empty string, do not add a Received:
5432 header line to the message. (Well, it adds a token one on the spool, but
5433 marks it "old" so that it doesn't get used or transmitted.)
5435 27. Installed eximstats 1.28 (addition of -nt option).
5437 28. There was no check for failure on the call to getsockname() in the daemon
5438 code. This can fail if there is a shortage of resources on the system, with
5439 ENOMEM, for example. A temporary error is now given on failure.
5441 29. Contrary to the C standard, it seems that in some environments, the
5442 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5443 program. Exim now does this explicitly; it affects the formatting of
5444 timestamps using strftime().
5446 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5447 complaints. I've now initialized all the variables, to avoid this.
5449 32. Header lines added by a system filter were not being "seen" during
5450 transport-time rewrites.
5452 33. The info_callback() function passed to OpenSSL is set up with type void
5453 (*)(SSL *, int, int), as described somewhere. However, when calling the
5454 function (actually a macro) that sets it up, the type void(*)() is
5455 expected. I've put in a cast to prevent warnings from picky compilers.
5457 34. If a DNS black list lookup found a CNAME record, but there were no A
5458 records associated with the domain it pointed at, Exim crashed.
5460 35. If a DNS black list lookup returned more than one A record, Exim ignored
5461 all but the first. It now scans all returned addresses if a particular IP
5462 value is being sought. In this situation, the contents of the
5463 $dnslist_value variable are a list of all the addresses, separated by a
5466 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5467 to accept a host name and all its aliases if the forward lookup for any of
5468 them yielded the IP address of the incoming connection. Now it accepts only
5469 those names whose forward lookup yields the correct IP address. Any other
5470 names are discarded. This closes a loophole whereby a rogue DNS
5471 administrator could create reverse DNS records to break through a
5472 wildcarded host restriction in an ACL.
5474 37. If a user filter or a system filter that ran in a subprocess used any of
5475 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5476 the wrong values were passed to the pipe command ($thisaddress had the
5477 value of $0, $0 had the value of $1, etc). This bug was introduced by
5478 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5480 38. Improved the line breaking for long SMTP error messages from ACLs.
5481 Previously, if there was no break point between 40 and 75 characters, Exim
5482 left the rest of the message alone. Two changes have been made: (a) I've
5483 reduced the minimum length to 35 characters; (b) if it can't find a break
5484 point between 35 and 75 characters, it looks ahead and uses the first one
5485 that it finds. This may give the occasional overlong line, but at least the
5486 remaining text gets split now.
5488 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5489 file descriptors might be low, and that setting 1000 would always raise it.
5490 It turns out that in some environments, the limit is already over 1000 and
5491 that lowering it causes trouble. So now Exim takes care not to decrease it.
5493 40. When delivering a message, the value of $return_path is set to $sender_
5494 address at the start of routing (routers may change the value). By an
5495 oversight, this default was not being set up when an address was tested by
5496 -bt or -bv, which affected the outcome if any router or filter referred to
5499 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5500 log only when "message" or "log_message" are set. However, if one of the
5501 conditions was an address verification, or a call to a nested ACL, the
5502 messages generated by the underlying test were being passed through. This
5503 no longer happens. The underlying message is available in $acl_verify_
5504 message for both "message" and "log_message" expansions, so it can be
5505 passed through if needed.
5507 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5508 new expansion $bh_ to give the encoded byte string without charset
5509 translation. Translation happens only if iconv() is available; HAVE_ICONV
5510 indicates this at build time. HEADERS_CHARSET gives the charset to
5511 translate to; headers_charset can change it in the configuration, and
5512 "headers charset" can change it in an individual filter file.
5514 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5515 that creates RFC 2047 encoded "words" labels them as that charset instead
5516 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5517 expansion operator; (ii) when Exim creates a From: line for a local
5518 message; (iii) when a header line is rewritten to include a "phrase" part.
5520 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5521 buggy, causing it to skip the first lines of messages whose message ID
5522 ended in 'D'. This would not have bitten before Exim release 4.14, because
5523 message IDs were unlikely to end in 'D' before then. The effect was to have
5524 incorrect size information for certain domains.
5526 45. #include "config.h" was missing at the start of the crypt16.c module. This
5527 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5530 46. If there was a timeout during a "random" callout check, Exim treated it as
5531 a failure of the random address, and carried on sending RSET and the real
5532 address. If the delay was just some slowness somewhere, the response to the
5533 original RCPT would be taken as a response to RSET and so on, causing
5534 mayhem of various kinds.
5536 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5537 when I implemented it. It didn't allow for the fact that some option values
5538 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5539 the right test for positive values.
5541 48. Domain names in DNS records are case-independent. Exim always looks them up
5542 in lower case. Some resolvers return domain names in exactly the case they
5543 appear in the zone file, that is, they may contain uppercase letters. Not
5544 all resolvers do this - some return always lower case. Exim was treating a
5545 change of case by a resolver as a change of domain, similar to a widening
5546 of a domain abbreviation. This triggered its re-routing code and so it was
5547 trying to route what was effectively the same domain again. This normally
5548 caused routing to fail (because the router wouldn't handle the domain
5549 twice). Now Exim checks for this case specially, and just changes the
5550 casing of the domain that it ultimately uses when it transmits the message
5553 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5556 50. If a filter generated a file delivery with a non-absolute name (possible if
5557 no home directory exists for the router), the forbid_file option was not
5560 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5561 the existing equality matching.
5563 52. Exim was using ints instead of ino_t variables in some places where it was
5564 dealing with inode numbers.
5566 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5567 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5568 called TMPDIR, and if it finds it is different, it changes its value.
5570 54. The smtp_printf() function is now made available to local_scan() so
5571 additional output lines can be written before returning. There is also an
5572 smtp_fflush() function to enable the detection of a dropped connection.
5573 The variables smtp_input and smtp_batched_input are exported to
5576 55. Changed the default runtime configuration: the message "Unknown user"
5577 has been removed from the ACL, and instead placed on the localuser router,
5578 using the cannot_route_message feature. This means that any verification
5579 failures that generate their own messages won't get overridden. Similarly,
5580 the "Unrouteable address" message that was in the ACL for unverifiable
5581 relay addresses has also been removed.
5583 56. Added hosts_avoid_esmtp to the smtp transport.
5585 57. The exicyclog script was not checking for the esoteric option
5586 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5587 will work only if exicyclog is run under the appropriate euid.
5589 58. Following a discussion on the list, the rules by which Exim recognises line
5590 endings on incoming messages have been changed. The -dropcr and drop_cr
5591 options are now no-ops, retained only for backwards compatibility. The
5592 following line terminators are recognized: LF CRLF CR. However, special
5593 processing applies to CR:
5595 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5596 nor a local message in the state where . is a terminator.
5598 (ii) If a bare CR is encountered in a header line, an extra space is added
5599 after the line terminator so as not to end the header. The reasoning
5600 behind this is that bare CRs in header lines are most likely either
5601 to be mistakes, or people trying to play silly games.
5603 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5604 was being incorrectly given as 18 bytes larger than it should have been.
5605 This is a VOB (very old bug).
5607 60. This may never have affected anything current, but just in case it has:
5608 When the local host is found other than at the start of a list of hosts,
5609 the local host, those with the same MX, and any that follow, are discarded.
5610 When the list in question was part of a longer list of hosts, the following
5611 hosts (not currently being processed) were also being discarded. This no
5612 longer happens. I'm not sure if this situation could ever has previously
5615 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5618 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5619 header. This is something that is recommended in a new Internet Draft, and
5620 is something that is documented as being done by Sendmail. There are two
5621 possible values. For messages generated by the autoreply transport, Exim
5624 Auto-Submitted: auto-replied
5626 whereas for all other generated messages (e.g. bounces) it adds
5628 Auto-Submitted: auto-generated
5630 63. The "personal" condition in filters now includes a test for the
5631 Auto-Submitted: header. If it contains the string "auto-" the message it
5632 not considered personal.
5634 64. Added rcpt_include_affixes as a generic transport option.
5636 65. Added queue_only_override (default true).
5638 66. Added the syslog_duplication option.
5640 67. If what should have been the first header line of a message consisted of
5641 a space followed by a colon, Exim was mis-interpreting it as a header line.
5642 It isn't of course - it is syntactically invalid and should therefore be
5643 treated as the start of the message body. The misbehaviour could have
5644 caused a number of strange effects, including loss of data in subsequent
5645 header lines, and spool format errors.
5647 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5648 client host had authenticated. This control can now be exercised by an ACL
5649 for more flexibility.
5651 69. By default, callouts do not happen when testing with -bh. There is now a
5652 variant, -bhc, which does actually run the callout code, including
5653 consulting and updating the callout cache.
5655 70. Added support for saslauthd authentication, courtesy of Alexander
5658 71. If statvfs() failed on the spool or log directories while checking their
5659 size for availability, Exim confusingly gave the error "space shortage".
5660 Furthermore, in debugging mode it crashed with a floating point exception.
5661 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5662 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5663 serious problem, Exim now writes to the main and panic logs when this
5664 happens, with details of the failure. It then refuses to accept the
5665 incoming message, giving the message "spool directory problem" or "log
5666 directory problem" with a 421 code for SMTP messages.
5668 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5669 0, 1, and 2 exist, because some OS complain for execs without them (see
5670 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5671 descriptors. However, the code omitted to check that the open succeeded,
5672 causing mysterious errors if for some reason the permissions on /dev/null
5673 got screwed. Now Exim writes a message to the main and panic logs, and
5674 bombs out if it can't open /dev/null.
5676 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5677 interact so that it is all more flexible. It is supposed to remain
5678 backwards compatible. Also added extra_local_interfaces.
5680 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5681 to bomb out with an assertion failure - to the client this appears as a
5682 connection drop. This problem occurs in the part of the code that was taken
5683 from the Samba project. Fortunately, the assertion is in a very simple
5684 function, so I have fixed this by reproducing the function inline in the
5685 one place where it is called, and arranging for authentication to fail
5686 instead of killing the process with assert().
5688 75. The SPA client code was not working when the server requested OEM rather
5689 than Unicode encoding.
5691 76. Added code to make require_files with a specific uid setting more usable in
5692 the case where statting the file as root fails - usually a non-root-mounted
5693 NFS file system. When this happens and the failure is EACCES, Exim now
5694 forks a subprocess and does the per-uid checking as the relevant uid.
5696 77. Added process_log_path.
5698 78. If log_file_path was not explicitly set, a setting of check_log_space or
5699 check_log_inodes was ignored.
5701 79. If a space check for the spool or log partitions fails, the incident is now
5702 logged. Of course, in the latter case the data may get lost...
5704 80. Added the %p formatting code to string_format() so that it can be used to
5705 print addresses in debug_print(). Adjusted all the address printing in the
5706 debugging in store.c to use %p rather than %d.
5708 81. There was a concern that a line of code in smtp_in.c could overflow a
5709 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5710 initially expressed, the concern was not well-founded, because trailing
5711 spaces are removed early. However, if the trailing spaces were followed by
5712 a NULL, they did not get removed, so the overflow was possible. Two fixes
5715 (a) I re-wrote the offending code in a cleaner fashion.
5716 (b) If an incoming SMTP command contains a NULL character, it is rejected
5719 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5720 runs initgroups(), so that if the Exim user is in any additional groups,
5721 they will be used during message reception.
5727 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob