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.
80 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
81 Pulled from Bugzilla 817 by Wolfgang Breyha.
83 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
86 JH/11 Add A= logging on delivery lines, and a client_set_id option on
89 JH/12 Add optional authenticated_sender logging to A= and a log_selector
92 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
94 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
95 advertise SMTP AUTH mechanism to us, instead of a generic
96 protocol violation error. Also, make Exim more robust to bad
97 data from the Dovecot auth socket.
99 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
101 When a queue runner is handling a message, Exim first routes the
102 recipient addresses, during which it prunes them based on the retry
103 hints database. After that it attempts to deliver the message to
104 any remaining recipients. It then updates the hints database using
107 So if a recipient address works intermittently, it can get repeatedly
108 deferred at routing time. The retry hints record remains fresh so the
109 address never reaches the final cutoff time.
111 This is a fairly common occurrence when a user is bumping up against
112 their storage quota. Exim had some logic in its local delivery code
113 to deal with this. However it did not apply to per-recipient defers
114 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
116 This commit adds a proper retry rule check during routing so that
117 the final cutoff time is checked against the message's age. I also
118 took the opportunity to unify three very similar blocks of code.
120 I suspect this new check makes the old local delivery cutoff check
121 redundant, but I have not verified this so I left the code in place.
123 TF/02 Correct gecos expansion when From: is a prefix of the username.
125 Test 0254 submits a message to Exim with the header
129 When I ran the test suite under the user fanf2, Exim expanded
130 the header to contain my full name, whereas it should have added
131 a Resent-Sender: header. It erroneously treats any prefix of the
132 username as equal to the username.
134 This change corrects that bug.
140 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
142 This, or similar/improved, will also be change PP/11 of 4.82.
148 PP/01 Handle short writes when writing local log-files.
149 In practice, only affects FreeBSD (8 onwards).
150 Bugzilla 1053, with thanks to Dmitry Isaikin.
152 NM/01 Bugzilla 949 - Documentation tweak
154 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
157 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
159 PP/02 Implemented gsasl authenticator.
161 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
163 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
164 `pkg-config foo` for cflags/libs.
166 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
167 with rest of GSASL and with heimdal_gssapi.
169 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
170 `pkg-config foo` for cflags/libs for the TLS implementation.
172 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
173 properties get this fed in as external SSF. A number of robustness
174 and debugging improvements to the cyrus_sasl authenticator.
176 PP/08 cyrus_sasl server now expands the server_realm option.
178 PP/09 Bugzilla 1214 - Log authentication information in reject log.
179 Patch by Jeremy Harris.
181 PP/10 Added dbmjz lookup type.
183 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
185 PP/12 MAIL args handles TAB as well as SP, for better interop with
186 non-compliant senders.
187 Analysis and variant patch by Todd Lyons.
189 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
190 Bug report from Lars Müller <lars@samba.org> (via SUSE),
191 Patch from Dirk Mueller <dmueller@suse.com>
193 PP/13 tls_peerdn now print-escaped for spool files.
194 Observed some $tls_peerdn in wild which contained \n, which resulted
195 in spool file corruption.
197 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
198 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
199 or write after TLS renegotiation, which otherwise led to messages
202 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
203 as a tracking header (ie: a signed header comes before the signature).
204 Patch from Wolfgang Breyha.
206 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
207 comma-sep list; embedded commas doubled.
209 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
211 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
213 Report and patch from Dmitry Banschikov.
215 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
216 Removed SSL_clear() after SSL_new() which led to protocol negotiation
217 failures. We appear to now support TLS1.1+ with Exim.
219 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
220 lets Exim select keys and certificates based upon TLS SNI from client.
221 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
222 before an outbound SMTP session. New log_selector, +tls_sni.
224 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
225 NULL dereference. Report and patch from Alun Jones.
227 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
228 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
229 Not seeing resolver debug output on NetBSD, but suspect this is a
230 resolver implementation change.
232 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
233 Left warnings. Added "eximon gdb" invocation mode.
235 PP/21 Defaulting "accept_8bitmime" to true, not false.
237 PP/22 Added -bw for inetd wait mode support.
239 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
240 locate the relevant includes and libraries. Made this the default.
242 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
243 Bugzilla 1246, report and most of solution from Tomasz Kusy.
245 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
246 This may cause build issues on older platforms.
248 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
249 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
250 gnutls_require_mac & gnutls_require_protocols (no longer supported).
251 Added SNI support via GnuTLS too.
252 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
254 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
256 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
257 Applied second patch from Janne, implementing suggestion to default
258 multiple-strings-in-record handling to match SPF spec.
260 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
262 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
263 read-only, out of scope).
264 Patch from Wolfgang Breyha, report from Stuart Northfield.
266 PP/29 Fix three issues highlighted by clang analyser static analysis.
267 Only crash-plausible issue would require the Cambridge-specific
268 iplookup router and a misconfiguration.
269 Report from Marcin Mirosław.
271 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
273 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
274 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
275 As part of this, removing so much warning spew let me fix some minor
276 real issues in debug logging.
278 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
279 assignment on my part. Fixed.
281 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
282 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
283 Janne Snabb (who went above and beyond: thank you).
285 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
286 string otherwise requires a connection and a bunch more work and it's
287 relatively easy to get wrong. Should also expose TLS library linkage
290 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
291 64-bit ${eval} (JH/03).
293 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
294 GNU libc to support some of the 64-bit stuff, should not lead to
295 conflicts. Defined before os.h is pulled in, so if a given platform
296 needs to override this, it can.
298 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
299 protection layer was required, which is not implemented.
300 Bugzilla 1254, patch from Wolfgang Breyha.
302 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
303 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
304 tls_dhparam take prime identifiers. Also unbreak combination of
305 OpenSSL+DH_params+TLSSNI.
307 PP/39 Disable SSLv2 by default in OpenSSL support.
313 PP/01 Solaris build fix for Oracle's LDAP libraries.
314 Bugzilla 1109, patch from Stephen Usher.
316 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
318 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
321 TF/02 Fix a couple more cases where we did not log the error message
322 when unlink() failed. See also change 4.74-TF/03.
324 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
325 lock up or crash if it happened to be inside a call to libc when it
326 got a SIGUSR1 from exiwhat.
328 The SIGUSR1 handler appends the current process status to the process
329 log which is later printed by exiwhat. It used to use the general
330 purpose logging code to do this, but several functions it calls are
331 not safe for signals.
333 The new output code in the SIGUSR1 handler is specific to the process
334 log, and simple enough that it's easy to inspect for signal safety.
335 Removing some special cases also simplifies the general logging code.
336 Removing the spurious timestamps from the process log simplifies
339 TF/04 Improved ratelimit ACL condition.
341 The /noupdate option has been deprecated in favour of /readonly which
342 has clearer semantics. The /leaky, /strict, and /readonly update modes
343 are mutually exclusive. The update mode is no longer included in the
344 database key; it just determines when the database is updated. (This
345 means that when you upgrde Exim will forget old rate measurements.)
347 Exim now checks that the per_* options are used with an update mode that
348 makes sense for the current ACL. For example, when Exim is processing a
349 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
350 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
351 must specify per_mail/readonly. If you omit the update mode it defaults to
352 /leaky where that makes sense (as before) or /readonly where required.
354 The /noupdate option is now undocumented but still supported for
355 backwards compatibility. It is equivalent to /readonly except that in
356 ACLs where /readonly is required you may specify /leaky/noupdate or
357 /strict/noupdate which are treated the same as /readonly.
359 A useful new feature is the /count= option. This is a generalization
360 of the per_byte option, so that you can measure the throughput of other
361 aggregate values. For example, the per_byte option is now equivalent
362 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
364 The per_rcpt option has been generalized using the /count= mechanism
365 (though it's more complicated than the per_byte equivalence). When it is
366 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
367 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
368 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
369 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
370 Note that using per_rcpt with a non-readonly update mode in more than
371 one ACL will cause the recipients to be double-counted. (The per_mail
372 and per_byte options don't have this problem.)
374 The handling of very low rates has changed slightly. If the computed rate
375 is less than the event's count (usually one) then this event is the first
376 after a long gap. In this case the rate is set to the same as this event's
377 count, so that the first message of a spam run is counted properly.
379 The major new feature is a mechanism for counting the rate of unique
380 events. The new per_addr option counts the number of different
381 recipients that someone has sent messages to in the last time period. It
382 behaves like per_rcpt if all the recipient addresses are different, but
383 duplicate recipient addresses do not increase the measured rate. Like
384 the /count= option this is a general mechanism, so the per_addr option
385 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
386 example, measure the rate that a client uses different sender addresses
387 with the options per_mail/unique=$sender_address. There are further
388 details in the main documentation.
390 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
392 TF/06 Removed a few PCRE remnants.
394 TF/07 Automatically extract Exim's version number from tags in the git
395 repository when doing development or release builds.
397 PP/02 Raise smtp_cmd_buffer_size to 16kB.
398 Bugzilla 879. Patch from Paul Fisher.
400 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
401 Heavily based on revision 40f9a89a from Simon Arlott's tree.
404 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
406 PP/05 Variable $av_failed, true if the AV scanner deferred.
407 Bugzilla 1078. Patch from John Horne.
409 PP/06 Stop make process more reliably on build failure.
410 Bugzilla 1087. Patch from Heiko Schlittermann.
412 PP/07 Make maildir_use_size_file an _expandable_ boolean.
413 Bugzilla 1089. Patch from Heiko Schlittermann.
415 PP/08 Handle ${run} returning more data than OS pipe buffer size.
416 Bugzilla 1131. Patch from Holger Weiß.
418 PP/09 Handle IPv6 addresses with SPF.
419 Bugzilla 860. Patch from Wolfgang Breyha.
421 PP/10 GnuTLS: support TLS 1.2 & 1.1.
423 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
426 PP/11 match_* no longer expand right-hand-side by default.
427 New compile-time build option, EXPAND_LISTMATCH_RHS.
428 New expansion conditions, "inlist", "inlisti".
430 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
432 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
434 PP/14 fix log_write() format string regression from TF/03.
435 Bugzilla 1152. Patch from Dmitry Isaikin.
441 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
443 PP/02 Harmonised TLS library version reporting; only show if debugging.
444 Layout now matches that introduced for other libraries in 4.74 PP/03.
446 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
448 PP/04 New "dns_use_edns0" global option.
450 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
453 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
454 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
456 TK/01 Updated PolarSSL code to 0.14.2.
457 Bugzilla 1097. Patch from Andreas Metzler.
459 PP/07 Catch divide-by-zero in ${eval:...}.
462 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
465 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
466 format-string attack -- SECURITY: remote arbitrary code execution.
468 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
469 time unintentionally subject to list matching rules, letting the header
470 cause arbitrary Exim lookups (of items which can occur in lists, *not*
471 arbitrary string expansion). This allowed for information disclosure.
473 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
474 INT_MIN/-1 -- value coerced to INT_MAX.
480 NM/01 Workround for PCRE version dependency in version reporting
483 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
484 This fixes portability to compilers other than gcc, notably
485 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
487 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
488 makefiles for portability to HP-UX and POSIX correctness.
490 PP/01 Permit LOOKUP_foo enabling on the make command-line.
491 Also via indented variable definition in the Makefile.
492 (Debugging by Oliver Heesakkers).
494 PP/02 Restore caching of spamd results with expanded spamd_address.
495 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
497 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
498 Improves build reliability. Fix from: Frank Elsner
500 NM/02 Fix wide character breakage in the rfc2047 coding
501 Fixes bug 1064. Patch from Andrey N. Oktyabrski
503 NM/03 Allow underscore in dnslist lookups
504 Fixes bug 1026. Patch from Graeme Fowler
506 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
507 Code patches from Adam Ciarcinski of NetBSD.
509 NM/04 Fixed exiqgrep to cope with mailq missing size issue
512 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
513 is logged, to avoid truncation. Patch from John Horne.
515 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
516 Patch from Jakob Hirsch.
518 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
519 SQL string expansion failure details.
520 Patch from Andrey Oktyabrski.
522 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
523 Patch from Simon Arlott.
525 PP/09 New lookups functionality failed to compile on old gcc which rejects
526 extern declarations in function scope.
527 Patch from Oliver Fleischmann
529 PP/10 Use sig_atomic_t for flags set from signal handlers.
530 Check getgroups() return and improve debugging.
531 Fixed developed for diagnosis in bug 927 (which turned out to be
534 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
535 Patch from Mark Zealey.
537 PP/12 Bugzilla 1056: Improved spamd server selection.
538 Patch from Mark Zealey.
540 PP/13 Bugzilla 1086: Deal with maildir quota file races.
541 Based on patch from Heiko Schlittermann.
543 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
544 Patch from Uwe Doering, sign-off by Michael Haardt.
546 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
547 variable declaration deep within a block. Bug and patch from
550 PP/15 lookups-Makefile IRIX compatibilty coercion.
552 PP/16 Make DISABLE_DKIM build knob functional.
554 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
555 Patch by Simon Arlott
557 TF/03 Fix valgrind.h portability to C89 compilers that do not support
558 variable argument macros. Our copy now differs from upstream.
564 TF/01 Failure to get a lock on a hints database can have serious
565 consequences so log it to the panic log.
567 TF/02 Log LMTP confirmation messages in the same way as SMTP,
568 controlled using the smtp_confirmation log selector.
570 TF/03 Include the error message when we fail to unlink a spool file.
572 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
573 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
574 for maintaining out-of-tree patches for some time.
576 PP/01 Bugzilla 139: Documentation and portability issues.
577 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
578 Handle per-OS dynamic-module compilation flags.
580 PP/02 Let /dev/null have normal permissions.
581 The 4.73 fixes were a little too stringent and complained about the
582 permissions on /dev/null. Exempt it from some checks.
583 Reported by Andreas M. Kirchwitz.
585 PP/03 Report version information for many libraries, including
586 Exim version information for dynamically loaded libraries. Created
587 version.h, now support a version extension string for distributors
588 who patch heavily. Dynamic module ABI change.
590 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
591 privilege escalation vulnerability whereby the Exim run-time user
592 can cause root to append content of the attacker's choosing to
595 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
598 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
599 If dropping privileges for untrusted macros, we disabled normal logging
600 on the basis that it would fail; for the Exim run-time user, this is not
601 the case, and it resulted in successful deliveries going unlogged.
602 Fixed. Reported by Andreas Metzler.
608 PP/01 Date: & Message-Id: revert to normally being appended to a message,
609 only prepend for the Resent-* case. Fixes regression introduced in
610 Exim 4.70 by NM/22 for Bugzilla 607.
612 PP/02 Include check_rfc2047_length in configure.default because we're seeing
613 increasing numbers of administrators be bitten by this.
615 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
617 PP/03 Bugzilla 994: added openssl_options main configuration option.
619 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
621 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
623 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
625 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
626 without a peer certificate, leading to a segfault because of an
627 assumption that peers always have certificates. Be a little more
628 paranoid. Problem reported by Martin Tscholak.
630 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
631 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
632 NB: ClamAV planning to remove STREAM in "middle of 2010".
633 CL also introduces -bmalware, various -d+acl logging additions and
634 more caution in buffer sizes.
636 PP/09 Implemented reverse_ip expansion operator.
638 PP/10 Bugzilla 937: provide a "debug" ACL control.
640 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
642 PP/12 Bugzilla 973: Implement --version.
644 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
646 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
648 PP/15 Bugzilla 816: support multiple condition rules on Routers.
650 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
651 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
652 ignore trailing whitespace.
654 JJ/02 prevent non-panic DKIM error from being sent to paniclog
656 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
659 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
660 Notification from Dr Andrew Aitchison.
662 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
663 ExtendedDetectionInfo response format.
664 Notification from John Horne.
666 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
669 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
670 XSL and documented dependency on system catalogs, with examples of how
673 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
676 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
677 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
678 configuration file which is writeable by the Exim user or group.
680 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
681 of configuration files to cover files specified with the -C option if
682 they are going to be used with root privileges, not just the default
685 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
686 option (effectively making it always true).
688 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
689 files to be used while preserving root privileges.
691 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
692 that rogue child processes cannot use them.
694 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
695 run-time user, instead of root.
697 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
698 Exim run-time user without dropping privileges.
700 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
701 result string, instead of calling string_vformat() twice with the same
704 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
705 for other users. Others should always drop root privileges if they use
706 -C on the command line, even for a whitelisted configure file.
708 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
710 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
716 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
717 $data_path, and $header_path variables; fixed documentation bugs and
720 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
721 exipick to access non-standard spools, including the "frozen" queue
724 NM/01 Bugzilla 965: Support mysql stored procedures.
725 Patch from Alain Williams
727 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
729 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
730 Patch from Andreas Metzler
732 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
733 Patch from Kirill Miazine
735 NM/05 Bugzilla 671: Added umask to procmail example.
737 JJ/03 installed exipick 20100323.0, fixing doc bug
739 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
740 directory. Notification and patch from Dan Rosenberg.
742 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
744 TK/02 Improve log output when DKIM signing operation fails.
746 MH/01 Treat the transport option dkim_domain as a colon separated
747 list, not as a single string, and sign the message with each element,
748 omitting multiple occurences of the same signer.
750 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
751 Bugzilla 985, 986. Patch by Simon Arlott
753 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
754 Patch by Simon Arlott
756 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
757 MBX locking. Notification from Dan Rosenberg.
763 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
765 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
767 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
769 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
771 NM/04 Bugzilla 915: Flag broken perl installation during build.
777 TK/01 Added patch by Johannes Berg that expands the main option
778 "spamd_address" if it starts with a dollar sign.
780 TK/02 Write list of recipients to X-Envelope-Sender header when building
781 the mbox-format spool file for content scanning (suggested by Jakob
784 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
785 (http://www.dcc-servers.net/) support via dccifd. Activated by
786 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
788 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
789 by Mark Daniel Reidel <mr@df.eu>.
791 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
792 When building exim an external PCRE library is now needed -
793 PCRE is a system library on the majority of modern systems.
794 See entry on PCRE_LIBS in EDITME file.
796 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
797 conversation. Added nologin parameter to request.
798 Patch contributed by Kirill Miazine.
800 TF/01 Do not log submission mode rewrites if they do not change the address.
802 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
804 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
805 log files in place. Contributed by Roberto Lima.
807 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
809 TF/03 Bugzilla 615: When checking the local_parts router precondition
810 after a local_part_suffix or local_part_prefix option, Exim now
811 does not use the address's named list lookup cache, since this
812 contains cached lookups for the whole local part.
814 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
815 Robert Millan. Documentation is in experimental-spec.txt.
817 TF/04 Bugzilla 668: Fix parallel build (make -j).
819 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
821 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
822 Patch provided by Jan Srzednicki.
824 TF/05 Leading white space used to be stripped from $spam_report which
825 wrecked the formatting. Now it is preserved.
827 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
828 that they are available at delivery time.
830 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
832 TF/08 TLS error reporting now respects the incoming_interface and
833 incoming_port log selectors.
835 TF/09 Produce a more useful error message if an SMTP transport's hosts
836 setting expands to an empty string.
838 NM/06 Bugzilla 744: EXPN did not work under TLS.
839 Patch provided by Phil Pennock.
841 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
842 Patch provided by Richard Godbee.
844 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
845 acl_smtp_notquit, added index entry.
847 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
848 Patch provided by Eugene Bujak.
850 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
851 accept(). Patch provided by Maxim Dounin.
853 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
854 Patch provided by Phil Pennock.
856 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
858 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
859 Patch provided by Brad "anomie" Jorsch.
861 NM/14 Bugzilla 622: Added timeout setting to transport filter.
862 Patch provided by Dean Brooks.
864 TK/05 Add native DKIM support (does not depend on external libraries).
866 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
867 Patch provided by Graeme Fowler.
869 NM/16 Bugzilla 851: Documentation example syntax fix.
871 NM/17 Changed NOTICE file to remove references to embedded PCRE.
873 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
876 NM/19 Bugzilla 745: TLS version reporting.
877 Patch provided by Phil Pennock.
879 NM/20 Bugzilla 167: bool: condition support.
880 Patch provided by Phil Pennock.
882 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
883 clients. Patch provided by Phil Pennock.
885 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
886 Patch provided by Brad "anomie" Jorsch.
888 NM/23 Bugzilla 687: Fix misparses in eximstats.
889 Patch provided by Heiko Schlittermann.
891 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
892 Patch provided by Heiko Schlittermann.
894 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
895 plus update to original patch.
897 NM/26 Bugzilla 799: Documentation correction for ratelimit.
899 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
900 Patch provided by David Brownlee.
902 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
904 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
906 NM/30 Bugzilla 888: TLS documentation bugfixes.
908 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
910 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
911 Unlike the original bugzilla I have changed all shell scripts in src tree.
913 NM/33 Bugzilla 898: Transport filter timeout fix.
914 Patch by Todd Rinaldo.
916 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
917 Patch by Serge Demonchaux.
919 NM/35 Bugzilla 39: Base64 decode bug fixes.
920 Patch by Jakob Hirsch.
922 NM/36 Bugzilla 909: Correct connect() call in dcc code.
924 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
926 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
928 NM/39 Bugzilla 911: Fixed MakeLinks build script.
934 TK/01 Add preliminary DKIM support. Currently requires a forked version of
935 ALT-N's libdkim that I have put here:
936 http://duncanthrax.net/exim-experimental/
938 Note to Michael Haardt: I had to rename some vars in sieve.c. They
939 were called 'true' and it seems that C99 defines that as a reserved
940 keyword to be used with 'bool' variable types. That means you could
941 not include C99-style headers which use bools without triggering
942 build errors in sieve.c.
944 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
945 as mailq or other aliases. Changed the --help handling significantly
946 to do whats expected. exim_usage() emits usage/help information.
948 SC/01 Added the -bylocaldomain option to eximstats.
950 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
952 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
954 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
960 PH/01 Another patch from the Sieve maintainer.
962 PH/02 When an IPv6 address is converted to a string for single-key lookup
963 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
964 dots are used instead of colons so that keys in lsearch files need not
965 contain colons. This was done some time before quoting was made available
966 in lsearch files. However, iplsearch files do require colons in IPv6 keys
967 (notated using the quote facility) so as to distinguish them from IPv4
968 keys. This meant that lookups for IP addresses in host lists did not work
969 for iplsearch lookups.
971 This has been fixed by arranging for IPv6 addresses to be expressed with
972 colons if the lookup type is iplsearch. This is not incompatible, because
973 previously such lookups could never work.
975 The situation is now rather anomolous, since one *can* have colons in
976 ordinary lsearch keys. However, making the change in all cases is
977 incompatible and would probably break a number of configurations.
979 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
982 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
983 conversion specification without a maximum field width, thereby enabling
984 a rogue spamd server to cause a buffer overflow. While nobody in their
985 right mind would setup Exim to query an untrusted spamd server, an
986 attacker that gains access to a server running spamd could potentially
987 exploit this vulnerability to run arbitrary code as the Exim user.
989 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
990 $primary_hostname instead of what libspf2 thinks the hosts name is.
992 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
993 a directory entry by the name of the lookup key. Previously, if a
994 symlink pointed to a non-existing file or a file in a directory that
995 Exim lacked permissions to read, a lookup for a key matching that
996 symlink would fail. Now it is enough that a matching directory entry
997 exists, symlink or not. (Bugzilla 503.)
999 PH/03 The body_linecount and body_zerocount variables are now exported in the
1002 PH/04 Added the $dnslist_matched variable.
1004 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1005 This means they are set thereafter only if the connection becomes
1008 PH/06 Added the client_condition to authenticators so that some can be skipped
1009 by clients under certain conditions.
1011 PH/07 The error message for a badly-placed control=no_multiline_responses left
1012 "_responses" off the end of the name.
1014 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1016 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1017 (without spaces) instead of just copying the configuration text.
1019 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1021 PH/11 Added $max_received_linelength.
1023 PH/12 Added +ignore_defer and +include_defer to host lists.
1025 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1026 way in which PCRE > 7.0 is built.
1028 PH/14 Implemented queue_only_load_latch.
1030 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1031 MAIL command. The effect was to mangle the value on 64-bit systems.
1033 PH/16 Another patch from the Sieve maintainer.
1035 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1037 PH/18 If a system quota error occurred while trying to create the file for
1038 a maildir delivery, the message "Mailbox is full" was not appended to the
1039 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1040 only to a quota excession during the actual writing of the file.
1042 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1043 characters?) which causes problems in log lines. The DN values are now
1044 passed through string_printing() before being added to log lines.
1046 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1047 and InterBase are left for another time.)
1049 PH/21 Added message_body_newlines option.
1051 PH/22 Guard against possible overflow in moan_check_errorcopy().
1053 PH/23 POSIX allows open() to be a macro; guard against that.
1055 PH/24 If the recipient of an error message contained an @ in the local part
1056 (suitably quoted, of course), incorrect values were put in $domain and
1057 $local_part during the evaluation of errors_copy.
1063 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1064 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1067 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1068 issue a MAIL command.
1070 PH/02 In an ACL statement such as
1072 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1074 if a client was not listed at all, or was listed with a value other than
1075 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1076 the condition was not true (as it should be), so access was not denied.
1077 The bug was that the ! inversion was incorrectly passed on to the second
1078 item. This has been fixed.
1080 PH/03 Added additional dnslists conditions == and =& which are different from
1081 = and & when the dns lookup returns more than one IP address.
1083 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1084 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1086 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1087 FSYNC, which compiles an option called disable_fsync that allows for
1088 bypassing fsync(). The documentation is heavily laced with warnings.
1090 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1092 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1093 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1094 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1095 including adding "make clean"; (3) Added -fPIC when compiling the test
1096 dynamically loaded module, to get rid of a warning.
1098 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1099 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1100 = 0s. The bug is otherwise harmless.
1102 PH/07 There was a bug in the dovecot authenticator such that the value of
1103 $auth1 could be overwritten, and so not correctly preserved, after a
1104 successful authentication. This usually meant that the value preserved by
1105 the server_setid option was incorrect.
1107 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1109 PH/09 Installed PCRE release 7.0.
1111 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1112 run for batched SMTP input. It is now run at the start of every message
1113 in the batch. While fixing this I discovered that the process information
1114 (output by running exiwhat) was not always getting set for -bs and -bS
1115 input. This is fixed, and it now also says "batched" for BSMTP.
1117 PH/11 Added control=no_pipelining.
1119 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1120 patch, slightly modified), and move the expansion of helo_data till after
1121 the connection is made in the smtp transport (so it can use these
1124 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1126 PH/14 Added log_selector = +pid.
1128 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1130 PH/16 Add ${if forany and ${if forall.
1132 PH/17 Added dsn_from option to vary the From: line in DSNs.
1134 PH/18 Flush SMTP output before performing a callout, unless control =
1135 no_callout_flush is set.
1137 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1138 was true (the default) a successful delivery failed to delete the retry
1139 item, thus causing premature timeout of the address. The bug is now
1142 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1144 PH/21 Long custom messages for fakedefer and fakereject are now split up
1145 into multiline reponses in the same way that messages for "deny" and
1146 other ACL rejections are.
1148 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1149 with slight modification.
1151 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1152 draft, changing the syntax and factoring some duplicate code".
1154 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1155 for deliveries of the second and subsequent messages over the same SMTP
1158 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1159 ${reduce, with only minor "tidies".
1161 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1163 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1164 expansion side effects.
1166 PH/27 When a message times out after an over-quota error from an Exim-imposed
1167 quota, the bounce message says "mailbox is full". This message was not
1168 being given when it was a system quota that was exceeded. It now should
1171 MH/03 Made $recipients available in local_scan(). local_scan() already has
1172 better access to the recipient list through recipients_list[], but
1173 $recipients can be useful in postmaster-provided expansion strings.
1175 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1176 in the case of a MAIL command with additional options following the
1177 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1178 were accidentally chopped off.
1180 PH/29 SMTP synchronization checks are implemented when a command is read -
1181 there is a check that no more input is waiting when there shouldn't be
1182 any. However, for some commands, a delay in an ACL can mean that it is
1183 some time before the response is written. In this time, more input might
1184 arrive, invalidly. So now there are extra checks after an ACL has run for
1185 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1186 pipelining has not been advertised.
1188 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1190 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1191 returned in the SMTP response when smtp_return_error_details was false.
1192 This has been fixed.
1194 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1195 instead of the C I/O that was originally supplied, because problems were
1196 reported on Solaris.
1198 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1199 Exim which did not show up earlier: it was assuming that a call to
1200 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1201 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1202 was a macro that became an assignment, so it seemed to work. This has
1203 changed to a proper function call with a void return, hence the compile
1204 error. Exim's code has been fixed.
1206 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1209 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1211 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1213 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1214 because it turns out to be too big or there is a timeout) there is no
1215 "Completed" line in the log. When some messages of this type were
1216 selected by exigrep, they were listed as "not completed". Others were
1217 picked up by some special patterns. I have improved the selection
1218 criteria to be more general.
1220 PH/38 The host_find_failed option in the manualroute router can now be set
1221 to "ignore", to completely ignore a host whose IP address cannot be
1222 found. If all hosts are ignored, the behaviour is controlled by the new
1223 host_all_ignored option.
1225 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1226 homing or because of multiple MX records with /mx) generated more than
1227 one IP address, and the following item turned out to be the local host,
1228 all the secondary addresses of the first item were incorrectly removed
1229 from the list, along with the local host and any following hosts (which
1230 is what is supposed to happen).
1232 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1233 whoever called Exim into the -H file. In the case of the daemon it was
1234 behaving confusingly. When first started, it used values for whoever
1235 started the daemon, but after a SIGHUP it used the Exim user (because it
1236 calls itself on a restart). I have changed the code so that it now always
1239 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1240 message are rejected with the same error (e.g. no authentication or bad
1241 sender address), and a DATA command is nevertheless sent (as can happen
1242 with PIPELINING or a stupid MUA), the error message that was given to the
1243 RCPT commands is included in the rejection of the DATA command. This is
1244 intended to be helpful for MUAs that show only the final error to their
1247 PH/42 Another patch from the Sieve maintainer.
1249 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1250 Eximstats - Fixed some broken HTML links and added missing column headers
1252 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1253 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1255 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1257 PH/43 Yet another patch from the Sieve maintainer.
1259 PH/44 I found a way to check for a TCP/IP connection going away before sending
1260 the response to the final '.' that terminates a message, but only in the
1261 case where the client has not sent further data following the '.'
1262 (unfortunately, this is allowed). However, in many cases there won't be
1263 any further data because there won't be any more messages to send. A call
1264 to select() can be used: if it shows that the input is "ready", there is
1265 either input waiting, or the socket has been closed. An attempt to read
1266 the next input character can distinguish the two cases. Previously, Exim
1267 would have sent an OK response which the client would never have see.
1268 This could lead to message repetition. This fix should cure that, at
1269 least in a lot of common cases.
1271 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1272 advertised in response to EHLO.
1278 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1279 fixed by 4.65/MH/01 (is this a record?) are fixed:
1281 (i) An empty string was always treated as zero by the numeric comparison
1282 operators. This behaviour has been restored.
1284 (ii) It is documented that the numeric comparison operators always treat
1285 their arguments as decimal numbers. This was broken in that numbers
1286 starting with 0 were being interpreted as octal.
1288 While fixing these problems I realized that there was another issue that
1289 hadn't been noticed. Values of message_size_limit (both the global option
1290 and the transport option) were treated as octal if they started with 0.
1291 The documentation was vague. These values are now always treated as
1292 decimal, and I will make that clear in the documentation.
1298 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1299 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1302 MH/01 Don't check that the operands of numeric comparison operators are
1303 integers when their expansion is in "skipping" mode (fixes bug
1304 introduced by 4.64-PH/07).
1306 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1307 child addresses, Exim now panics and dies. Previously, because the count
1308 is held in a short int, deliveries were likely to be lost. As such a
1309 large number of recipients for a single message is ridiculous
1310 (performance will be very, very poor), I have chosen to impose a limit
1311 rather than extend the field.
1317 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1318 leftover -K file (the existence of which was triggered by #402).
1319 While we were at it, introduced process PID as part of the -K
1320 filename. This should rule out race conditions when creating
1323 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1324 processing considerably. Previous code took too long for large mails,
1325 triggering a timeout which in turn triggers #401.
1327 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1328 in the DK code in transports.c. sendfile() is not really portable,
1329 hence the _LINUX specificness.
1331 TF/01 In the add_headers option to the mail command in an Exim filter,
1332 there was a bug that Exim would claim a syntax error in any
1333 header after the first one which had an odd number of characters
1336 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1337 callout verification, Exim cached a "reject" for the entire domain. This
1338 is correct for most verifications, but it is not correct for a recipient
1339 verification with use_sender or use_postmaster set, because in that case
1340 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1341 case of MAIL FROM:<> rejection from other early rejections (e.g.
1342 rejection of HELO). When verifying a recipient using a non-null MAIL
1343 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1344 Whatever the result of the callout, the value of the domain cache is
1345 left unchanged (for any other kind of callout, getting as far as trying
1346 RCPT means that the domain itself is ok).
1348 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1351 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1352 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1353 session, the daemon ignores ECONNECT errors and logs others; it now
1354 ignores EPIPE as well.
1356 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1357 (quoted-printable decoding).
1359 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1360 later the small subsequent patch to fix an introduced bug.
1362 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1364 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1366 PH/08 An error is now given if message_size_limit is specified negative.
1368 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1369 to be given (somewhat) arbitrary names.
1371 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1374 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1375 miscellaneous code fixes
1377 PH/10 Added the log_reject_target ACL modifier to specify where to log
1380 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1381 hostname. This is wrong, because it relates to the incoming message (and
1382 probably the interface on which it is arriving) and not to the outgoing
1383 callout (which could be using a different interface). This has been
1384 changed to use the value of the helo_data option from the smtp transport
1385 instead - this is what is used when a message is actually being sent. If
1386 there is no remote transport (possible with a router that sets up host
1387 addresses), $smtp_active_hostname is used.
1389 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1390 tweaks were necessary in order to get it to work (see also 21 below):
1391 (a) The code assumed that strncpy() returns a negative number on buffer
1392 overflow, which isn't the case. Replaced with Exim's string_format()
1394 (b) There were several signed/unsigned issues. I just did the minimum
1395 hacking in of casts. There is scope for a larger refactoring.
1396 (c) The code used strcasecmp() which is not a standard C function.
1397 Replaced with Exim's strcmpic() function.
1398 (d) The code set only $1; it now sets $auth1 as well.
1399 (e) A simple test gave the error "authentication client didn't specify
1400 service in request". It would seem that Dovecot has changed its
1401 interface. Fortunately there's a specification; I followed it and
1402 changed what the client sends and it appears to be working now.
1404 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1407 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1408 address A is aliased to B and C, where B exists and C does not. Without
1409 -v the output is "A verified" because verification stops after a
1410 successful redirection if more than one address is generated. However,
1411 with -v the child addresses are also verified. Exim was outputting "A
1412 failed to verify" and then showing the successful verification for C,
1413 with its parentage. It now outputs "B failed to verify", showing B's
1414 parentage before showing the successful verification of C.
1416 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1417 look up a TXT record in a specific list after matching in a combined
1420 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1421 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1422 they consult the DNS. I had assumed they would set it the way they
1423 wanted; and indeed my experiments on Linux seem to show that in some
1424 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1425 To be on the safe side, however, I have now made the interface to
1426 host_find_byname() similar to host_find_bydns(), with an argument
1427 containing the DNS resolver options. The host_find_byname() function now
1428 sets these options at its start, just as host_find_bydns() does. The smtp
1429 transport options dns_qualify_single and dns_search_parents are passed to
1430 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1431 of host_find_byname() use the default settings of RES_DEFNAMES
1432 (qualify_single) but not RES_DNSRCH (search_parents).
1434 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1435 spool_read_header() do less string testing, by means of a preliminary
1436 switch on the second character of optional "-foo" lines. (This is
1437 overdue, caused by the large number of possibilities that now exist.
1438 Originally there were few.) While I was there, I also converted the
1439 str(n)cmp tests so they don't re-test the leading "-" and the first
1440 character, in the hope this might squeeze out yet more improvement.
1442 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1443 flag allowing group syntax was set by the header_syntax check but not
1444 turned off, possible causing trouble later; (2) The flag was not being
1445 set at all for the header_verify test, causing "group"-style headers to
1446 be rejected. I have now set it in this case, and also caused header_
1447 verify to ignore an empty address taken from a group. While doing this, I
1448 came across some other cases where the code for allowing group syntax
1449 while scanning a header line wasn't quite right (mostly, not resetting
1450 the flag correctly in the right place). These bugs could have caused
1451 trouble for malformed header lines. I hope it is now all correct.
1453 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1454 with the "reply" argument non-NULL. The code, however (which originally
1455 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1456 but it didn't always do it. This confused somebody who was copying the
1457 code for some other use. I have removed all the tests.
1459 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1460 feature that was used to support insecure browsers during the U.S. crypto
1461 embargo. It requires special client support, and Exim is probably the
1462 only MTA that supported it -- and would never use it because real RSA is
1463 always available. This code has been removed, because it had the bad
1464 effect of slowing Exim down by computing (never used) parameters for the
1465 RSA_EXPORT functionality.
1467 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1468 authenticator to fail if there's a tab character in the incoming data
1469 (there should never be unless someone is messing about, as it's supposed
1470 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1471 if the connection is using TLS or if the remote IP is the same as the
1472 local IP, and the "valid-client-cert option" if a client certificate has
1475 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1476 authenticators. This can be used for authorization after authentication
1477 succeeds. (In the case of plaintext, it servers for both authentication
1480 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1481 if any retry times were supplied.
1483 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1484 connection, where there is no client IP address to check. In this
1485 situation, the verify now always succeeds.
1487 PH/25 Applied John Jetmore's -Mset patch.
1489 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1491 PH/27 In a string expansion for a processed (not raw) header when multiple
1492 headers of the same name were present, leading whitespace was being
1493 removed from all of them, but trailing whitespace was being removed only
1494 from the last one. Now trailing whitespace is removed from each header
1495 before concatenation. Completely empty headers in a concatenation (as
1496 before) are ignored.
1498 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1499 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1501 PH/29 [Removed. This was a change that I later backed out, and forgot to
1502 correct the ChangeLog entry (that I had efficiently created) before
1503 committing the later change.]
1505 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1506 address errors (4xx response to RCPT) over the same connection as other
1507 messages routed to the same hosts. Such deliveries are always "forced",
1508 so retry times are not inspected. This resulted in far too many retries
1509 for the affected addresses. The effect occurred only when there were more
1510 hosts than the hosts_max_try setting in the smtp transport when it had
1511 the 4xx errors. Those hosts that it had tried were not added to the list
1512 of hosts for which the message was waiting, so if all were tried, there
1513 was no problem. Two fixes have been applied:
1515 (i) If there are any address or message errors in an SMTP delivery, none
1516 of the hosts (tried or untried) are now added to the list of hosts
1517 for which the message is waiting, so the message should not be a
1518 candidate for sending over the same connection that was used for a
1519 successful delivery of some other message. This seems entirely
1520 reasonable: after all the message is NOT "waiting for some host".
1521 This is so "obvious" that I'm not sure why it wasn't done
1522 previously. Hope I haven't missed anything, but it can't do any
1523 harm, as the worst effect is to miss an optimization.
1525 (ii) If, despite (i), such a delivery is accidentally attempted, the
1526 routing retry time is respected, so at least it doesn't keep
1527 hammering the server.
1529 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1530 in ${readsocket because some servers need this prod.
1532 PH/32 Added some extra debug output when updating a wait-xxx database.
1534 PH/33 The hint "could be header name not terminated by colon", which has been
1535 given for certain expansion errors for a long time, was not being given
1536 for the ${if def:h_colon_omitted{... case.
1538 PH/34 The spec says: "With one important exception, whenever a domain list is
1539 being scanned, $domain contains the subject domain." There was at least
1540 one case where this was not true.
1542 PH/35 The error "getsockname() failed: connection reset by peer" was being
1543 written to the panic log as well as the main log, but it isn't really
1544 panic-worthy as it just means the connection died rather early on. I have
1545 removed the panic log writing for the ECONNRESET error when getsockname()
1548 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1549 runs only) independently of the message's sender address. This meant
1550 that, if the 4xx error was in fact related to the sender, a different
1551 message to the same recipient with a different sender could confuse
1552 things. In particualar, this can happen when sending to a greylisting
1553 server, but other circumstances could also provoke similar problems.
1554 I have changed the default so that the retry time for these errors is now
1555 based a combination of the sender and recipient addresses. This change
1556 can be overridden by setting address_retry_include_sender=false in the
1559 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1560 remote server are returned as part of bounce messages. This was not
1561 happening for LMTP over a pipe (the lmtp transport), but now it is the
1562 same for both kinds of LMTP.
1564 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1565 in header lines that were in fact CNAMEs. This is no longer the case.
1567 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1568 and queue runs started by the daemon processed all messages. This has
1569 been fixed so that -R and -S can now usefully be given with -q<time>.
1571 PH/40 Import PCRE release 6.7 (fixes some bugs).
1573 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1575 PH/42 Give an error if -q is specified more than once.
1577 PH/43 Renamed the variables $interface_address and $interface_port as
1578 $received_ip_address and $received_port, to make it clear that these
1579 values apply to message reception, and not to the outgoing interface when
1580 a message is delivered. (The old names remain recognized, of course.)
1582 PH/44 There was no timeout on the connect() call when using a Unix domain
1583 socket in the ${readsocket expansion. There now is.
1585 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1586 be meaningful with "accept".
1588 SC/01 Eximstats V1.43
1589 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1591 SC/02 Eximstats V1.44
1592 Use a glob alias rather than an array ref in the generated
1593 parser. This improves both readability and performance.
1595 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1596 Collect SpamAssassin and rejection statistics.
1597 Don't display local sender or destination tables unless
1598 there is data to show.
1599 Added average volumes into the top table text output.
1601 SC/04 Eximstats V1.46
1602 Collect data on the number of addresses (recipients)
1603 as well as the number of messages.
1605 SC/05 Eximstats V1.47
1606 Added 'Message too big' to the list of mail rejection
1607 reasons (thanks to Marco Gaiarin).
1609 SC/06 Eximstats V1.48
1610 Mainlog lines which have GMT offsets and are too short to
1611 have a flag are now skipped.
1613 SC/07 Eximstats V1.49 (Alain Williams)
1614 Added the -emptyok flag.
1616 SC/08 Eximstats V1.50
1617 Fixes for obtaining the IP address from reject messages.
1619 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1620 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1621 whitesspace changes from 4.64-PH/27
1623 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1626 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1627 are found, allow negative numbers in numeric criteria)
1629 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1631 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1632 to match changes made in 4.64-PH/43
1634 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1636 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1637 "domain" is actually an IP address, and force a failure. This locks out
1638 those revolvers/nameservers that support "A-for-A" lookups, in
1639 contravention of the specifications.
1641 PH/48 When a host name was looked up from an IP address, and the subsequent
1642 forward lookup of the name timed out, the host name was left in
1643 $sender_host_name, contrary to the specification.
1645 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1646 restricted to single-key lookups, Exim was not diagnosing an error if
1647 * or *@ was used with a query-style lookup.
1649 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1651 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1652 long ago, but noone interested enough thought of it. Let's just say that
1653 the "1.1" means that there are some new functions that weren't there at
1654 some point in the past.
1656 PH/51 Error processing for expansion failure of helo_data from an smtp
1657 transport during callout processing was broken.
1659 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1660 tested/used via the -bh/-bhc/-bs options.
1662 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1663 bug, fixed in subsequent PCRE releases).
1665 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1666 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1668 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1674 SC/01 Use a glob alias rather than an array ref in eximstats generated
1675 parser. This improves both readability and performance.
1677 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1678 Don't display local sender or destination tables in eximstats unless
1679 there is data to show.
1680 Added average volumes into the eximstats top table text output.
1682 SC/03 Collect data on the number of addresses (recipients) as well
1683 as the number of messages in eximstats.
1685 TF/01 Correct an error in the documentation for the redirect router. Exim
1686 does (usually) call initgroups() when daemonizing.
1688 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1689 with consistent privilege compared to when running as a daemon.
1691 TF/03 Note in the spec that $authenticated_id is not set for local
1692 submissions from trusted users.
1694 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1695 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1697 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1698 by adding some example configuration directives to the default
1699 configuration file. A little bit of work is required to uncomment the
1700 directives and define how usernames and passwords are checked, but
1701 there is now a framework to start from.
1703 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1704 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1705 without this. I don't know how relevant this is to other LDAP libraries.
1707 PH/02 Add the verb name to the "unknown ACL verb" error.
1709 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1711 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1713 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1714 directory not expanded when it should be if an expanded home directory
1715 was set for the address (which is overridden by the transport).
1717 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1720 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1721 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1722 because it is too late at that time, and has no effect.
1724 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1725 security issue with \' (bugzilla #107). I could not use the
1726 PQescapeStringConn() function, because it needs a PGconn value as one of
1729 PH/08 When testing addresses using -bt, indicate those final addresses that
1730 are duplicates that would not cause an additional delivery. At least one
1731 person was confused, thinking that -bt output corresponded to deliveries.
1732 (Suppressing duplicates isn't a good idea as you lose the information
1733 about possibly different redirections that led to the duplicates.)
1735 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1736 systems where poll() doesn't work, in particular OS X.
1738 PH/10 Added more information to debugging output for retry time not reached.
1740 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1741 operations in malware.c.
1743 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1746 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1747 syslog_duplication set false, log lines that would normally be written
1748 both the the main log and to the reject log were not written to syslog at
1751 PH/14 In the default configuration, change the use of "message" in ACL warn
1752 statements to "add_header".
1754 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1755 not followed by a command (e.g. "seen endif").
1757 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1758 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1761 PH/17 Added extra conditions to the default value of delay_warning_condition
1765 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1766 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1767 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1770 The Auto-Submitted: and various List- headers are standardised, whereas I
1771 don't think Precedence: ever was.
1773 PH/18 Refactored debugging code in route_finduser() to show more information,
1774 in particular, the error code if getpwnam() issues one.
1776 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1777 This is apparently needed in addition to the PH/07 change above to avoid
1778 any possible encoding problems.
1780 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1781 but not after initializing Perl.
1783 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1784 output them only if debugging. By default they are written stderr,
1785 apparently, which is not desirable.
1787 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1790 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1793 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1795 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1796 authenticated or an ident call has been made. Suppress the default
1797 values for $authenticated_id and $authenticated_sender (but permit -oMai
1798 and -oMas) when testing with -bh.
1800 PH/24 Re-jigged the order of the tests in the default configuration so that the
1801 tests for valid domains and recipients precede the DNS black list and CSA
1802 tests, on the grounds that those ones are more expensive.
1804 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1805 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1806 This bug exists in every version of Exim that I still have, right back to
1809 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1810 However, an attempt to turn on case-sensitivity in a regex key by
1811 including (?-i) didn't work because the subject string was already
1812 lowercased, and the effects were non-intuitive. It turns out that a
1813 one-line patch can be used to allow (?-i) to work as expected.
1819 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1820 other effects) broke the use of negated acl sub-conditions.
1822 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1825 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1826 "Deny" causes Exim to reject the incoming connection with a 554 error.
1827 Unfortunately, if there is a major crisis, such as a disk failure,
1828 tcp-wrappers gives "deny", whereas what one would like would be some
1829 kind of temporary error. A kludge has been added to help with this.
1830 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1831 554 error is used if errno is still zero or contains ENOENT (which occurs
1832 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1835 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1837 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1838 errors. Otherwise a message that provokes a temporary error (when other
1839 messages do not) can cause a whole host to time out.
1841 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1842 addresses were routed directly to files or pipes from a redirect router.
1843 File deliveries just didn't batch; pipe deliveries might have suffered
1846 PH/06 A failure to get a lock for a hints database would erroneously always say
1847 "Failed to get write lock", even when it was really a read lock.
1849 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1850 of 0600. This has been changed to use the value of the lockfile_mode
1851 option (which defaults to 0600).
1853 PH/08 Applied small patch from the Sieve maintainer.
1855 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1856 folder from quota calculations, a direct delivery into this folder messed
1857 up the contents of the maildirsize file. This was because the regex was
1858 used only to exclude .Trash (or whatever) when the size of the mailbox
1859 was calculated. There was no check that a delivery was happening into an
1860 excluded directory. This bug has been fixed by ignoring all quota
1861 processing for deliveries into excluded directories.
1863 PH/10 Added the maildirfolder_create_regex option to appendfile.
1869 PH/01 The code for finding all the local interface addresses on a FreeBSD
1870 system running IPv6 was broken. This may well have applied to all BSD
1871 systems, as well as to others that have similar system calls. The broken
1872 code found IPv4 interfaces correctly, but gave incorrect values for the
1873 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1874 that it would not match correctly against @[] and not recognize the IPv6
1877 PH/02 The ipliteral router was not recognizing addresses of the form user@
1878 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1880 PH/03 Added disable_ipv6.
1882 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1883 decoded form, because it is most often used to construct To: headers
1884 lines in autoreplies, and the decoded form may well be syntactically
1885 invalid. However, $reply_address has leading white space removed, and all
1886 newlines turned into spaces so that the autoreply transport does not
1889 PH/05 If group was specified without a user on a router, and no group or user
1890 was specified on a transport, the group from the router was ignored.
1892 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1893 for visible compile-time settings that can be used to change these
1894 numbers, for those that want even more. Backwards compatibility with old
1895 spool files has been maintained. However, going back to a previous Exim
1896 release will lost any variables that are in spool files.
1898 PH/07 Two small changes when running in the test harness: increase delay when
1899 passing a TCP/IP connection to a new process, in case the original
1900 process has to generate a bounce, and remove special handling of
1901 127.0.0.2 (sic), which is no longer necessary.
1903 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1904 be the same on different OS.
1906 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1909 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1910 whether --show-vars was specified or not
1912 JJ/02 exipick: Added support for new ACL variable spool format introduced
1915 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1916 syntactically invalid From: or Reply-to: line, and a filter used this to
1917 generate an autoreply, and therefore failed to obtain an address for the
1918 autoreply, Exim could try to deliver to a non-existent relative file
1919 name, causing unrelated and misleading errors. What now happens is that
1920 it logs this as a hard delivery error, but does not attempt to create a
1923 PH/11 The exinext utility has a -C option for testing purposes, but although
1924 the given file was scanned by exinext itself; it wasn't being passed on
1925 when Exim was called.
1927 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1928 an end-of-file indication when reading a command response.
1930 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1931 compiled. In many other places in Exim, IPv6 addresses are always
1932 recognized, so I have changed this. It also means that IPv4 domain
1933 literals of the form [IPV4:n.n.n.n] are now always recognized.
1935 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1936 used if the router is not running as root, for example, when verifying at
1937 ACL time, or when using -bh. The debugging output from this situation was
1938 non-existent - all you got was a failure to exec. I have made two
1941 (a) Failures to set uid/gid, the current directory, or a process leader
1942 in a subprocess such as that created by queryprogram now generate
1943 suitable debugging ouput when -d is set.
1945 (b) The queryprogram router detects when it is not running as root,
1946 outputs suitable debugging information if -d is set, and then runs
1947 the subprocess without attempting to change uid/gid.
1949 PH/15 Minor change to Makefile for building test_host (undocumented testing
1952 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1953 additional section of a DNS packet that returns MX or SRV records.
1954 Instead, it always explicitly searches for A/AAAA records. This avoids
1955 major problems that occur when a DNS server includes only records of one
1956 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1957 fixed another bug: if SRV records were looked up and the corresponding
1958 address records were *not* found in the additional section, the port
1959 values from the SRV records were lost.
1961 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1962 using the correct key (the original address) when searching the retry
1963 rules in order to find which one to use for generating the retry hint.
1965 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1966 adding the default one. Similarly, if it contains a Reply-To: header, the
1967 errors_reply_to option, if set, is not used.
1969 PH/19 When calculating a retry time, Exim used to measure the "time since
1970 failure" by looking at the "first failed" field in the retry record. Now
1971 it does not use this if it is later than than the arrival time of the
1972 message. Instead it uses the arrival time. This makes for better
1973 behaviour in cases where some deliveries succeed, thus re-setting the
1974 "first failed" field. An example is a quota failure for a huge message
1975 when small messages continue to be delivered. Without this change, the
1976 "time since failure" will always be short, possible causing more frequent
1977 delivery attempts for the huge message than are intended.
1978 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1980 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1981 $1, $2, $3) because the numerical variables can be reset during some
1982 expansion items (e.g. "match"), thereby losing the authentication data.
1984 PH/21 Make -bV show the size of off_t variables so that the test suite can
1985 decide whether to run tests for quotas > 2G.
1987 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
1988 mailbox_size, and mailbox_filecount in the appendfile transport. If a
1989 filecount value is greater than 2G or if a quota value is greater than 2G
1990 on a system where the size of off_t is not greater than 4, a panic error
1993 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
1994 never match. The debug and -bh output now contains an explicit error
1995 message indicating a malformed IPv4 address or mask.
1997 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
1998 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
1999 PH/23 above applies.
2001 PH/25 Do not write to syslog when running in the test harness. The only
2002 occasion when this arises is a failure to open the main or panic logs
2003 (for which there is an explicit test).
2005 PH/26 Added the /no_tell option to "control=freeze".
2007 PH/27 If a host name lookup failed very early in a connection, for example, if
2008 the IP address matched host_lookup and the reverse lookup yielded a name
2009 that did not have a forward lookup, an error message of the form "no IP
2010 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2011 could be logged. Now it outputs the IP address instead of "NULL".
2013 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2014 allows the sender and the authenticated sender to be set when
2015 submitting a message from within Exim. Since child_open_exim() is
2016 documented for local_scan(), the new function should be too.
2018 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2019 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2020 results in an empty string is now treated as unset.
2022 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2024 PH/31 Added sender_verify_fail logging option.
2026 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2027 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2028 tidied the source and removed it altogether.
2030 PH/33 When a queue run was abandoned because the load average was too high, a
2031 log line was always written; now it is written only if the queue_run log
2032 selector is set. In addition, the log line for abandonment now contains
2033 information about the queue run such as the pid. This is always present
2034 in "start" and "stop" lines but was omitted from the "abandon" line.
2036 PH/34 Omit spaces between a header name and the colon in the error message that
2037 is given when verify = headers_syntax fails (if there are lots of them,
2038 the message gets confusing).
2040 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2041 names, as there are now some PTR records that contain slashes. This check
2042 is only to protect against broken name servers that fall over on strange
2043 characters, so the fact that it applies to all lookups doesn't matter.
2045 PH/36 Now that the new test suite is complete, we can remove some of the
2046 special code in Exim that was needed for the old test suite. For example,
2047 sorting DNS records because real resolvers return them in an arbitrary
2048 order. The new test suite's fake resolver always returns records in the
2051 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2052 bounces) except when queue_only is set, to avoid logging races between
2053 the different processes.
2055 PH/38 Panic-die if .include specifies a non-absolute path.
2057 PH/39 A tweak to the "H" retry rule from its user.
2059 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2060 a label. They prevented compilation on older perls.
2062 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2063 a warning to be raised on newish perls.
2065 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2066 on queue. Changes to match documented behaviour of showing count of
2067 messages matching specified criteria.
2069 PH/40 Changed the default ident timeout from 30s to 5s.
2071 PH/41 Added support for the use of login_cap features, on those BSD systems
2072 that have them, for controlling the resources used by pipe deliveries.
2074 PH/42 The content-scanning code uses fopen() to create files in which to put
2075 message data. Previously it was not paying any attention to the mode of
2076 the files. Exim runs with umask(0) because the rest of the code creates
2077 files with open(), and sets the required mode explicitly. Thus, these
2078 files were ending up world-writeable. This was not a big issue, because,
2079 being within the spool directory, they were not world-accessible. I have
2080 created a function called modefopen, which takes an additional mode
2081 argument. It sets umask(777), creates the file, chmods it to the required
2082 mode, then resets the umask. All the relevant calls to fopen() in the
2083 content scanning code have been changed to use this function.
2085 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2086 to 24 hours. This avoids potential overflow problems when processing G
2087 and H retry rules. I suspect nobody ever tinkers with this value.
2089 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2091 PH/45 When the plaintext authenticator is running as a client, the server's
2092 challenges are checked to ensure they are valid base64 strings. By
2093 default, the authentication attempt is cancelled if an invalid string is
2094 received. Setting client_ignore_invalid_base64 true ignores these errors.
2095 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2096 they are received. Thus, the responses can be made to depend on the
2097 challenges. If an invalid string is ignored, an empty string is placed in
2100 PH/46 Messages that are created by the autoreply transport now contains a
2101 References: header, in accordance with RFCs 2822 and 3834.
2103 PH/47 Added authenticated_sender_force to the smtp transport.
2105 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2107 PH/49 Installed latest patch from the Sieve maintainer.
2109 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2110 was also set, the appendfile transport was unnecessarily scanning a
2111 directory of message files (e.g. for maildir delivery) to find the count
2112 of files (along with the size), even though it did not need this
2113 information. It now does the scan only if it needs to find either the
2114 size of the count of files.
2116 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2118 PH/52 Two bugs concerned with error handling when the smtp transport is
2121 (i) Exim was not creating retry information for temporary errors given
2122 for individual recipients after the DATA command when the smtp transport
2123 was used in LMTP mode. This meant that they could be retried too
2124 frequently, and not timed out correctly.
2126 (ii) Exim was setting the flag that allows error details to be returned
2127 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2128 recipients that were returned after the DATA command.
2130 PH/53 This is related to PH/52, but is more general: for any failing address,
2131 when detailed error information was permitted to be returned to the
2132 sender, but the error was temporary, then after the final timeout, only
2133 "retry timeout exceeded" was returned. Now it returns the full error as
2134 well as "retry timeout exceeded".
2136 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2137 do this, and (what is worse) MTAs that accept it.
2139 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2140 will now be deprecated.
2142 PH/56 New os.c-cygwin from the Cygwin maintainer.
2144 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2145 formats (previously only available in exim formats via -bpr, -bpru,
2146 and -bpra. Now also available in native and exiqgrep formats)
2148 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2149 with very large, slow to parse queues
2151 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2153 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2155 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2156 responses to authentication challenges, though it was showing the
2157 challenges; (ii) I've removed the CR characters from the debug output for
2160 PH/58 Allow for the insertion of a newline as well as a space when a string
2161 is turned into more than one encoded-word during RFC 2047 encoding. The
2162 Sieve code now uses this.
2164 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2165 data_4xx, lost_connection, tls_required.
2167 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2168 message was being sent as an SMTP response.
2170 PH/61 Add -l and -k options to exicyclog.
2172 PH/62 When verifying, if an address was redirected to one new address, so that
2173 verification continued, and the new address failed or deferred after
2174 having set something in $address_data, the value of $address_data was not
2175 passed back to the ACL. This was different to the case when no
2176 redirection occurred. The value is now passed back in both cases.
2178 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2179 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2180 use login_cap.h, so on its own it isn't the distinguishing feature. The
2181 new name refers directly to the setclassresources() function.
2183 PH/65 Added configuration files for NetBSD3.
2185 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2187 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2188 is preferred over IPv4.
2190 PH/68 The bounce_return_message and bounce_return_body options were not being
2191 honoured for bounces generated during the reception of non-SMTP messages.
2192 In particular, this applied to messages rejected by the ACL. This bug has
2193 been fixed. However, if bounce_return_message is true and bounce_return_
2194 body is false, the headers that are returned for a non-SMTP message
2195 include only those that have been read before the error was detected.
2196 (In the case of an ACL rejection, they have all been read.)
2198 PH/69 The HTML version of the specification is now built in a directory called
2199 spec_html instead of spec.html, because the latter looks like a path with
2200 a MIME-type, and this confuses some software.
2202 PH/70 Catch two compiler warnings in sieve.c.
2204 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2205 function verify_get_ident() calls ip_connect() to connect a socket, but
2206 if the "connect()" function timed out, ip_connect() used to close the
2207 socket. However, verify_get_ident() also closes the socket later, and in
2208 between Exim writes to the log, which may get opened at this point. When
2209 the socket was closed in ip_connect(), the log could get the same file
2210 descriptor number as the socket. This naturally causes chaos. The fix is
2211 not to close the socket in ip_connect(); the socket should be closed by
2212 the function that creates it. There was only one place in the code where
2213 this was missing, in the iplookup router, which I don't think anybody now
2214 uses, but I've fixed it anyway.
2216 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2217 well as to direct DNS lookups. Otherwise the handling of names in host
2218 lists is inconsistent and therefore confusing.
2224 PH/01 Two changes to the default runtime configuration:
2226 (1) Move the checks for relay_from_hosts and authenticated clients from
2227 after to before the (commented out) DNS black list checks.
2229 (2) Add control=submission to the relay_from_hosts and authenticated
2230 clients checks, on the grounds that messages accepted by these
2231 statements are most likely to be submissions.
2233 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2235 (1) Generate an error if the third argument for the ${prvs expansion is
2238 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2241 (3) Reset the variables that are obtained from the first argument of
2242 ${prvscheck and used in the second argument before leaving the code,
2243 because their memory is reclaimed, so using them afterwards may do
2246 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2247 one (it's much easier than Tom thought :-).
2249 (5) Because of (4), we can now allow for the use of $prvscheck_result
2250 inside the third argument.
2252 PH/03 For some reason, the default setting of PATH when running a command from
2253 a pipe transport was just "/usr/bin". I have changed it to
2256 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2257 anything to be listed in the output from -bV.
2259 PH/05 When a filter generated an autoreply, the entire To: header line was
2260 quoted in the delivery log line, like this:
2262 => >A.N.Other <ano@some.domain> <original@ddress> ...
2264 This has been changed so that it extracts the operative address. There
2265 may be more than one such address. If so, they are comma-separated, like
2268 => >ano@some.domain,ona@other.domain <original@ddress> ...
2270 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2271 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2272 not being looked up in the rDNS to get a host name, Exim was showing the
2273 IP address twice in Received: lines, even though the IP addresses were
2274 identical. For example:
2276 Received: from [1.2.3.4] (helo=[1.2.3.4])
2278 However, if the real host name was known, it was omitting the HELO data
2279 if it matched the actual IP address. This has been tidied up so that it
2280 doesn't show the same IP address twice.
2282 PH/07 When both +timestamp and +memory debugging was on, the value given by
2283 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2284 called by the debug printing, thereby overwriting the timestamp buffer.
2285 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2287 PH/08 When the original message was included in an autoreply transport, it
2288 always said "this is a copy of the message, including all the headers",
2289 even if body_only or headers_only was set. It now gives an appropriate
2292 PH/09 Applied a patch from the Sieve maintainer which:
2294 o fixes some comments
2295 o adds the (disabled) notify extension core
2296 o adds some debug output for the result of if/elsif tests
2297 o points to the current vacation draft in the documentation
2298 and documents the missing references header update
2302 o fixes a bug in processing the envelope test (when testing
2303 multiple envelope elements, the last element determinted the
2306 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2307 Electronic Mail") by including:
2309 Auto-submitted: auto-generated
2311 in the messages that it generates (bounce messages and others, such as
2312 warnings). In the case of bounce messages for non-SMTP mesages, there was
2313 also a typo: it was using "Auto_submitted" (underscore instead of
2314 hyphen). Since every message generated by Exim is necessarily in response
2315 to another message, thes have all been changed to:
2317 Auto-Submitted: auto-replied
2319 in accordance with these statements in the RFC:
2321 The auto-replied keyword:
2323 - SHOULD be used on messages sent in direct response to another
2324 message by an automatic process,
2326 - MUST NOT be used on manually-generated messages,
2328 - MAY be used on Delivery Status Notifications (DSNs) and Message
2329 Disposition Notifications (MDNs),
2331 - MUST NOT be used on messages generated by automatic or periodic
2332 processes, except for messages which are automatic responses to
2335 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2336 to the default Received: header definition.
2338 PH/12 Added log selector acl_warn_skipped (default on).
2340 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2341 variables because (a) they are in the wrong storage pool and (b) even if
2342 they were copied, it wouldn't work properly because of the caching.
2344 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2345 checking when decoding. Apparently there are clients that generate
2346 overlong encoded strings. Why am I not surprised?
2348 PH/15 If the first argument of "${if match_address" was not empty, but did not
2349 contain an "@" character, Exim crashed. Now it writes a panic log message
2350 and treats the condition as false.
2352 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2354 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2355 extension "envelope-auth". The code is finished and in agreement with
2356 other implementations, but there is no documentation so far and in fact,
2357 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2358 not changing the active code.
2360 Print executed "if" and "elsif" statements when debugging is used. This
2361 helps a great deal to understand what a filter does.
2363 Document more things not specified clearly in RFC3028. I had all this
2364 sorted out, when out of a sudden new issues came to my mind. Oops."
2366 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2369 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2370 canonical form (as documented). However, after a host name lookup from
2371 the IP address, check_host() was doing a simple string comparison with
2372 addresses acquired from the DNS when checking that the found name did
2373 have the original IP as one of its addresses. Since any found IPv6
2374 addresses are likely to be in abbreviated form, the comparison could
2375 fail. Luckily, there already exists a function for doing the comparison
2376 by converting both addresses to binary, so now that is used instead of
2377 the text comparison.
2379 PH/20 There was another similar case to PH/19, when a complete host name was
2380 given in a host list; looking up its IP address could give an abbreviated
2381 form, whereas the current host's name might or might not be abbreviated.
2382 The same fix has been applied.
2388 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2389 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2392 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2393 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2395 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2397 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2398 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2399 Also, for "Auto-Submitted", treat anything other than "no" as
2400 non-personal, in accordance with RFC 3834. (Previously it treated
2401 anything starting "auto-" as non-personal.)
2403 TF/01 The control=submission/name=... option had a problem with syntax
2404 errors if the name included a slash character. The /name= option
2405 now slurps the rest of the string, so it can include any characters
2406 but it must come last in the list of options (after /sender_retain
2409 PH/05 Some modifications to the interface to the fake nameserver for the new
2417 TK/01 Added the "success_on_redirect" address verification option. See
2418 NewStuff for rationale and an example.
2420 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2422 PH/02 Patch to exigrep to allow it to work on syslog lines.
2424 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2425 fread() to skip over the body file's header line, because in Cygwin the
2426 header line is locked and is inaccessible.
2428 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2429 co-exist for some time) to make it clear that it is the Exim ID that is
2430 referenced, not the Message-ID: header line.
2432 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2433 string_format() function, because snprintf() does not exist on all
2436 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2437 ${stat: expansion item.
2439 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2440 protocol synchronization error", to keep the pedants happy.
2442 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2443 well as for IRIX systems, when gcc is being used. See the host.c source
2446 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2448 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2451 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2452 transport and to the smtp transport in LMTP mode.
2454 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2456 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2457 run a filter in a subprocess. This could lead to confusion in subsequent
2458 lookups in the parent process. There should also be a search_tidyup() at
2459 the end of the subprocess.
2461 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2462 only if the host matched helo_try_verify_hosts, which caused the
2463 verification to occur when the EHLO/HELO command was issued. The ACL just
2464 tested the remembered result. Now, if a previous verification attempt has
2465 not happened, "verify = helo" does it there and then.
2467 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2469 TK/03 Fix log output including CR from clamd.
2471 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2472 exist provoked a memory error which could cause a segfault.
2474 PH/15 Installed PCRE 6.2
2476 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2478 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2479 of the problem. Specifically, suggested +O2 rather than +O1 for the
2482 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2484 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2485 record, the port was not correctly logged when the outgoing_port log
2486 selector was set (it logged the transort's default port).
2488 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2489 fallback_hosts, and "hosts" in the smtp transport.
2491 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2492 host errors such as "Connection refused".
2494 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2495 authentication with radiusclient 0.4.9:
2497 - Error returned from rc_read_config was caught wrongly
2498 - Username/password not passed on to radius server due to wrong length.
2500 The presumption is that some radiusclient API changes for 4.51/PH/17
2501 were not taken care of correctly. The code is still untested by me (my
2502 Linux distribution still has 0.3.2 of radiusclient), but it was
2503 contributed by a Radius user.
2505 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2506 expanding the "port" option of the smtp transport.
2508 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2509 while reading a MIME header. Thanks to Tom Hughes for a patch.
2511 PH/24 Include config.h inside local_scan.h so that configuration settings are
2514 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2515 that in an ACL for RCPT (for example), you can examine exactly what was
2518 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2519 commands, but it was not correctly comparing the address with the actual
2520 client host address. Thus, it would show the EHLO address in Received:
2521 header lines when this was not necessary.
2523 PH/27 Added the % operator to ${eval:}.
2525 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2526 it should be ignoring failures (because with -C, for example, it has lost
2527 privilege). It wasn't ignoring creation failures other than "already
2530 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2533 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2534 because an input line was too long, either on its own, or by virtue of
2535 too many continuations, the temporary file was not being removed, and the
2536 return code was incorrect.
2538 PH/31 Missing "BOOL" in function definition in filtertest.c.
2540 PH/32 Applied Sieve patches from the maintainer.
2542 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2544 PH/33 Added "verify = not_blind".
2546 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2547 Local/Makefile (with some defaults set). These are used in built scripts
2548 such as exicyclog, but they have never been used in the exim_install
2549 script (though there are many overriding facilities there). I have
2550 arranged that the exim_install script now takes note of these two
2553 PH/35 Installed configuration files for Dragonfly.
2555 PH/36 When a locally submitted message by a trusted user did not contain a
2556 From: header, and the sender address was obtained from -f or from an SMTP
2557 MAIL command, and the trusted user did not use -F to supply a sender
2558 name, $originator_name was incorrectly used when constructing a From:
2559 header. Furthermore, $originator_name was used for submission mode
2560 messages from external hosts without From: headers in a similar way,
2561 which is clearly wrong.
2563 PH/37 Added control=suppress_local_fixups.
2565 PH/38 When log_selector = +received_sender was set, and the addition of the
2566 sender made the log line's construction buffer exactly full, or one byte
2567 less than full, an overflow happened when the terminating "\n" was
2570 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2571 when the result of a list match is failure because a DNS lookup failed.
2573 PH/40 RM_COMMAND is now used in the building process.
2575 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2576 the "build-* directories that it finds.
2578 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2579 address in a domain literal was a prefix of an interface address.
2581 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2582 when verifying a sender address, unless rewrite_headers is false.
2584 PH/44 Wrote a long comment about why errors_to addresses are verified as
2585 recipients, not senders.
2587 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2588 the ratelimit ACL was added.
2590 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2592 PH/46 Added extra information about PostgreSQL errors to the error string.
2594 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2595 avoiding the need to install special zones in a real server. This is
2596 backwards compatible; if it can't find the fake resolver, it drops back.
2597 Thus, both old and new test suites can be run.
2599 TF/02 Added util/ratelimit.pl
2601 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2602 clock is set back in time.
2604 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2605 Candler <B.Candler@pobox.com>.
2607 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2608 OK for addresses that are the result of redirections.
2610 PH/48 A number of further additions for the benefit of the new test suite,
2611 including a fake gethostbyname() that interfaces to the fake DNS resolver
2614 TF/06 The fix for widen_domains has also been applied to qualify_single and
2615 search_parents which are the other dnslookup options that can cause
2618 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2621 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2623 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2624 service" if it encountered an MX record with an empty target hostname.
2625 The message is now "an MX or SRV record indicated no SMTP service".
2627 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2628 if the DNS of the sending site is misconfigured. This is quite a
2629 common situation. This change restores the behaviour of treating a
2630 helo verification defer as a failure.
2632 PH/51 If self=fail was set on a router, the bounce message did not include the
2633 actual error message.
2639 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2641 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2642 command itself ended in error, the underlying message about the transport
2643 filter timeout was being overwritten with the pipe command error. Now the
2644 underlying error message should be appended to the second error message.
2646 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2648 PH/02 Reduce the amount of output that "make" produces by default. Full output
2649 can still be requested.
2651 PH/03 The warning log line about a condition test deferring for a "warn" verb
2652 was being output only once per connection, rather than after each
2653 occurrence (because it was using the same function as for successful
2654 "warn" verbs). This seems wrong, so I have changed it.
2656 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2657 it should not have, which might have caused a crash in the right
2658 circumstances, but probably never did.
2660 PH/04 Installed a modified version of Tony Finch's patch to make submission
2661 mode fix the return path as well as the Sender: header line, and to
2662 add a /name= option so that you can make the user's friendly name appear
2665 TF/03 Added the control = fakedefer ACL modifier.
2667 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2668 Mark Lowes for thorough testing.
2670 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2672 TK/03 Merged latest SRS patch from Miles Wilton.
2674 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2675 with the definition in sysexits.h (which is #included earlier).
2676 Fortunately, Exim does not actually use EX_OK. The code used to try to
2677 preserve the sysexits.h value, by assumimg that macro definitions were
2678 scanned for macro replacements. I have been disabused of this notion,
2679 so now the code just undefines EX_OK before #including unistd.h.
2681 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2682 in the smtp transport. When a block could not be written in a single
2683 write() function, the timeout was being re-applied to each part-write.
2684 This seems wrong - if the receiver was accepting one byte at a time it
2685 would take for ever. The timeout is now adjusted when this happens. It
2686 doesn't have to be particularly precise.
2688 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2689 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2691 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2692 without a domain if the check to <postmaster@domain> fails.
2694 SC/01 Eximstats: added -xls and the ability to specify output files
2695 (patch written by Frank Heydlauf).
2697 SC/02 Eximstats: use FileHandles for outputing results.
2699 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2701 SC/04 Eximstats: fixed display of large numbers with -nvr option
2703 SC/05 Eximstats: fixed merging of reports with empty tables.
2705 SC/06 Eximstats: added the -include_original_destination flag
2707 SC/07 Eximstats: removed tabs and trailing whitespace.
2709 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2711 TK/06 MBOX spool code: Add real "From " MBOX separator line
2712 so the .eml file is really in mbox format (even though
2713 most programs do not really care). Patch from Alex Miller.
2715 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2716 The latter is generated from $received_to and is only set if the
2717 message has one envelope recipient. SA can use these headers,
2718 obviously out-of-the-box. Patch from Alex Miller.
2720 PH/08 The ${def test on a variable was returning false if the variable's
2721 value was "0", contrary to what the specification has always said!
2722 The result should be true unless the variable is empty.
2724 PH/09 The syntax error of a character other than { following "${if
2725 def:variable_name" (after optional whitespace) was not being diagnosed.
2726 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2727 accidental colon was present, for example, could give incorrect results.
2729 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2730 result is used (not including appendfile, where other changes are about
2733 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2734 This involved changing a lot of size variables from int to off_t. It
2735 should work with maildirs and everything.
2737 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2738 spamd dying while we are connected to it.
2740 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2743 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2744 function for BDB 4.3.
2746 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2748 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2749 the sources for PCRE have been re-arranged and more files are now
2752 PH/15 The code I had for printing potentially long long variables in PH/11
2753 above was not the best (it lost precision). The length of off_t variables
2754 is now inspected at build time, and an appropriate printing format (%ld
2755 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2756 to be "long long int" or "long int". This is needed for the internal
2757 formatting function string_vformat().
2759 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2760 the configuration file to be ":syslog", then the script "guesses" where
2761 the logs files are, rather than using the compiled in default. In our
2762 case the guess is not the same as the compiled default, so the script
2763 suddenly stopped working when I started to use syslog. The patch checks
2764 to see if log_file_path is "". If so, it attempts to read it from exim
2765 with no configuration file to get the compiled in version, before it
2766 falls back to the previous guessing code."
2768 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2769 implementing BATV in an Exim configuration. See NewStuff for the gory
2772 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2773 Makefile that are specific to HP-UX.
2775 PH/18 If the "use_postmaster" option was set for a recipient callout together
2776 with the "random" option, the postmaster address was used as the MAIL
2777 FROM address for the random test, but not for the subsequent recipient
2778 test. It is now used for both.
2780 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2781 patch removes a few documentation additions to RFC 3028, because the
2782 latest draft now contains them. It adds the new en;ascii-case comparator
2783 and a new error check for 8bit text in MIME parts. Comparator and
2784 require names are now matched exactly. I enabled the subaddress
2785 extension, but it is not well tested yet (read: it works for me)."
2787 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2788 rework some of the code of TK/09 above to avoid the hardwired use of
2789 "%lld" and "long long". Replaced the call to snprintf() with a call to
2792 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2793 records point to non-existent hosts", "retry timeout exceeded", and
2794 "retry time not reached for any host after a long failure period".
2796 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2797 experimental DomainKeys support:
2799 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2800 (2) On an error such as an illegally used "control", the wrong name for
2801 the control was given.
2803 These problems did NOT occur unless DomainKeys support was compiled.
2805 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2807 PH/24 Added ${if match_ip condition.
2809 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2810 databases so that it will be absolutely obvious if a crash occurs in the
2811 DB library. This is a regular occurrence (often caused by mis-matched
2814 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2815 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2816 picked up on a user's system that detects such things. There doesn't seem
2817 to be a gcc warning option for this - only an attribute that has to be
2818 put on the function's prototype. It seems that in Fedora Core 4 they have
2819 set this on a number of new functions. No doubt there will be more in due
2822 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2823 specify a transport. However, if an address that was verified by such a
2824 router was the subject of a callout, Exim crashed because it tried to
2825 read the rcpt_include_affixes from the non-existent transport. Now it
2826 just assumes that the setting of that option is false. This bug was
2827 introduced by 4.51/PH/31.
2829 PH/28 Changed -d+all to exclude +memory, because that information is very
2830 rarely of interest, but it makes the output a lot bigger. People tend to
2831 do -d+all out of habit.
2833 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2834 code in os-type was giving problems when libc.so lives in lib64, like on
2837 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2838 aren't the modern standard, and it seems that some systems' include files
2839 don't always have them. Exim was already checking for some of the newer
2840 ones like T_AAAA, and defining it itself. I've added checks for all the
2841 record types that Exim uses.
2843 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2844 not automatically generating a new one, as it is supposed to. This
2845 prevented TLS from working. If the file did exist, but contained invalid
2846 data, a new version was generated, as expected. It was only the case of a
2847 non-existent file that was broken.
2849 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2850 with a change in libdomainkeys > 0.64.
2852 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2853 from DNS. If the selector record carries the flag, it now has
2854 precedence over the domain-wide flag.
2856 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2858 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2859 the use of a port name that isn't defined in /etc/services) occurred, the
2860 message was deferred as in a normal delivery, and thus remained on the
2861 spool, instead of being failed because of the mua_wrapper setting. This
2862 is now fixed, and I tidied up some of the mua_wrapper messages at the
2865 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2866 the messages in a hash of arrays rather than using individual hashes.
2867 This is a bit cleaner and results in dramatic memory savings, albeit
2868 at a slight CPU cost.
2870 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2871 as requested by Marc Sherman.
2873 SC/10 Eximstats: added histograms for user specified patterns as requested
2876 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2878 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2879 fopen() in the content-scanning modules that did not already have it.
2885 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2886 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2888 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2890 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2892 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2893 to test Sieve filters that use "vacation".
2895 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2896 that changes the way the GnuTLS parameters are stored in the cache file.
2897 The new format can be generated externally. For backward compatibility,
2898 if the data in the cache doesn't make sense, Exim assumes it has read an
2899 old-format file, and it generates new data and writes a new file. This
2900 means that you can't go back to an older release without removing the
2903 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2904 work if there are any delivery delays because "one_time" forces the
2905 parent to be marked "delivered", so its unseen clone is never tried
2906 again. For this reason, Exim now forbids the simultaneous setting of
2909 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2910 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2911 entry if you want to know the details. The fix, however, neglected to
2912 consider the case when local delivery batching is involved. The test for
2913 "previously delivered" was not happening when checking to see if an
2914 address could be batched with a previous (undelivered) one; under
2915 certain circumstances this could lead to multiple deliveries to the same
2918 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2919 in its include files, and this causes problems building Exim.
2921 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2922 header_syntax) but Exim was just ignoring anything given after a slash.
2923 In particular, this caused confusion with an attempt to use "verify =
2924 reverse_host_lookup/defer_ok". An error is now given when options are
2925 supplied for verify items that do not have them. (Maybe reverse_host_
2926 lookup should have a defer_ok option, but that's a different point.)
2928 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2929 defined by RFC 821) to 2048, because there were problems with some AUTH
2930 commands, and RFC 1869 says the size should be increased for extended
2931 SMTP commands that take arguments.
2933 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2936 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2937 "unknown" error; now it says that the functionality isn't in the binary.
2939 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2940 an address' error message when a string expansion fails (syntax or
2941 whatever). Otherwise the password may appear in the log. Following change
2942 PH/42 below, there is no longer a chance of it appearing in a bounce
2945 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2947 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2948 of its addresses was ever tried. (Bugzilla bug #2.)
2950 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2951 the result incorrectly in the debug output. (It correctly added a newline
2952 to what was transported.)
2954 TF/01 Added $received_time.
2956 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2957 commented out examples of how to interface to a virus scanner and to
2958 SpamAssassin. Also added commented examples of av_scanner and
2959 spamd_address settings.
2961 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2962 and controls are allowed in which ACLs. There were a couple of minor
2963 errors. Some of the entries in the conditions table (which is a table of
2964 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2965 negation of where the condition IS allowed.
2967 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2969 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2970 header file does not have a version number, so I've had to invent a new
2971 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2972 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2973 radiusclient), but it was contributed by a Radius user.
2975 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2976 files or directories, for OpenSSL.
2978 PH/19 When an Exim process that is running as root has to create an Exim log
2979 file, it does so in a subprocess that runs as exim:exim so as to get the
2980 ownership right at creation (otherwise, other Exim processes might see
2981 the file with the wrong ownership). There was no test for failure of this
2982 fork() call, which would lead to the process getting stuck as it waited
2983 for a non-existent subprocess. Forks do occasionally fail when resources
2984 run out. I reviewed all the other calls to fork(); they all seem to check
2987 PH/20 When checking for unexpected SMTP input at connect time (before writing
2988 the banner), Exim was not dealing correctly with a non-positive return
2989 from the read() function. If the client had disconnected by this time,
2990 the result was a log entry for a synchronization error with an empty
2991 string after "input=" when read() returned zero. If read() returned -1
2992 (an event I could not check), uninitialized data bytes were printed.
2993 There were reports of junk text (parts of files, etc) appearing after
2996 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
2998 PH/22 Added support for macro redefinition, and (re)definition in between
2999 driver and ACL definitions.
3001 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3002 forgetting to use the resulting value; it was using the unexpanded value.
3004 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3005 hadn't been configured. The fix is from Juergen Kreileder, who
3006 understands it better than I do:
3008 "Here's what I see happening with three configured cyrus_sasl
3009 authenticators configured (plain, login, cram-md5):
3011 On startup auth_cyrus_sasl_init() gets called for each of these.
3012 This means three calls to sasl_listmech() without a specified mech_list.
3013 => SASL tests which mechs of all available mechs actually work
3014 => three warnings about OTP not working
3015 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3017 With the patch, sasl_listmech() also gets called three times. But now
3018 SASL's mech_list option is set to the server_mech specified in the the
3019 authenticator. Or in other words, the answer from sasl_listmech()
3020 gets limited to just the mech you're testing for (which is different
3022 => the return list contains just 'plain' or 'login', 'cram-md5' or
3023 nothing depending on the value of ob->server_mech.
3025 I've just tested the patch: Authentication still works fine,
3026 unavailable mechs specified in the exim configuration are still
3027 caught, and the auth.log warnings about OTP are gone."
3029 PH/25 When debugging is enabled, the contents of the command line are added
3030 to the debugging output, even when log_selector=+arguments is not
3033 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3034 answer is "GNU", and only if the return is "GNU/something" is the answer
3037 PH/27 $acl_verify_message is now set immediately after the failure of a
3038 verification in an ACL, and so is available in subsequent modifiers. In
3039 particular, the message can be preserved by coding like this:
3041 warn !verify = sender
3042 set acl_m0 = $acl_verify_message
3044 Previously, $acl_verify_message was set only while expanding "message"
3045 and "log_message" when a very denied access.
3047 PH/28 Modified OS/os.c-Linux with
3049 -#ifndef OS_LOAD_AVERAGE
3050 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3052 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3053 nomenclature these days.)
3055 PH/29 Installed patch from the Sieve maintainer that adds the options
3056 sieve_useraddress and sieve_subaddress to the redirect router.
3058 PH/30 In these circumstances:
3059 . Two addresses routed to the same list of hosts;
3060 . First host does not offer TLS;
3061 . First host accepts first address;
3062 . First host gives temporary error to second address;
3063 . Second host offers TLS and a TLS session is established;
3064 . Second host accepts second address.
3065 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3066 and peerdn, if requested) that were in fact used only for the second
3069 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3070 attention to any local part prefix or suffix that was matched by the
3071 router that accepted the address. It now behaves in the same way as it
3072 does for delivery: the affixes are removed from the local part unless
3073 rcpt_include_affixes is set on the transport.
3075 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3076 timeout during the DATA phase of an incoming message.
3078 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3079 applied a patch sanctioned by the Sieve maintainer.
3081 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3082 the uid or gid is negative. A case of a negative gid caused this to be
3083 noticed. The fix allows for either to be negative.
3085 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3086 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3089 PH/36 The change PH/12 above was broken. Fixed it.
3091 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3092 the grounds that routing the same address twice would always produce the
3093 same answer. This might have been true once, but it is certainly no
3094 longer true now. Routing a child address may depend on the previous
3095 routing that produced that child. Some complicated redirection strategies
3096 went wrong when messages had multiple recipients, and made Exim's
3097 behaviour dependent on the order in which the addresses were given.
3099 I have moved the duplicate checking until after the routing is complete.
3100 Exim scans the addresses that are assigned to local and remote
3101 transports, and removes any duplicates. This means that more work will be
3102 done, as duplicates will always all be routed, but duplicates are
3103 presumably rare, so I don't expect this is of any significance.
3105 For deliveries to pipes, files, and autoreplies, the duplicate checking
3106 still happens during the routing process, since they are not going to be
3109 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3110 It corrects a timeout issue with spamd. This is Ian's comment: "The
3111 background is that sometimes spamd either never reads data from a
3112 connection it has accepted, or it never writes response data. The exiscan
3113 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3114 blindly assumes that writes won't block so it may never time out."
3116 PH/39 Allow G after quota size as well as K and M.
3118 PH/40 The value set for $authenticated_id in an authenticator may not contain
3119 binary zeroes or newlines because the value is written to log lines and
3120 to spool files. There was no check on this. Now the value is run through
3121 the string_printing() function so that such characters are converted to
3122 printable escape sequences.
3124 PH/41 $message_linecount is a new variable that contains the total number of
3125 lines in the message. Compare $body_linecount, which is the count for the
3128 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3129 bounce and delay warning messages, except in certain special cases, which
3132 (a) An SMTP error message from a remote host;
3133 (b) A message specified in a :fail: redirection;
3134 (c) A message specified in a "fail" command in a system filter;
3135 (d) A message specified in a FAIL return from the queryprogram router;
3136 (e) A message specified by the cannot_route_message router option.
3138 In these cases only, Exim does include the error details in bounce and
3139 warning messages. There are also a few cases where bland messages such
3140 as "unrouteable address" or "local delivery error" are given.
3142 PH/43 $value is now also set for the "else" part of a ${run expansion.
3144 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3145 being worked on, but at least Exim now implements the latest version to
3148 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3149 process to complete was treated as a delivery failure, a timeout while
3150 writing the message to the pipe was logged, but erroneously treated as a
3151 successful delivery. Such timeouts include transport filter timeouts. For
3152 consistency with the overall process timeout, these timeouts are now
3153 treated as errors, giving rise to delivery failures by default. However,
3154 there is now a new Boolean option for the pipe transport called
3155 timeout_defer, which, if set TRUE, converts the failures into defers for
3156 both kinds of timeout. A transport filter timeout is now identified in
3159 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3160 systems where "make" and "gmake" are different, calling "gmake" at top
3161 level broke things. I've arranged for the value of $(MAKE) to be passed
3162 from the Makefile to this script so that it can call the same version of
3166 A note about Exim versions 4.44 and 4.50
3167 ----------------------------------------
3169 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3170 changes of various kinds. As a consequence, a big documentation update was
3171 needed. This delayed the release for rather longer than seemed good, especially
3172 in the light of a couple of (minor) security issues. Therefore, the changes
3173 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3174 release. So 4.44 and 4.50 are in effect two different branches that both start
3177 I have left the 4.50 change log unchanged; it contains all the changes since
3178 4.43. The change log for 4.44 is below; many of its items are identical to
3179 those for 4.50. This seems to be the most sensible way to preserve the
3180 historical information.
3186 1. Minor wording change to the doc/README.SIEVE file.
3188 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3189 computation of the current number of files was incorrect.
3191 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3192 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3195 4. Give more explanation in the error message when the command for a transport
3196 filter fails to execute.
3198 5. There are several places where Exim runs a non-Exim command in a
3199 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3200 was being done only for the command run by the queryprogram router. It is
3201 now done for all such subprocesses. The other cases are: ${run, transport
3202 filters, and the commands run by the lmtp and pipe transports.
3204 6. Added CONFIGURE_GROUP build-time option.
3206 7. Some older OS have a limit of 256 on the maximum number of file
3207 descriptors. Exim was using setrlimit() to set 1000 as a large value
3208 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3209 systems. I've change it so that if it can't get 1000, it tries for 256.
3211 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3212 was an oversight, and furthermore, ever since the addition of extra
3213 controls (e.g. 4.43/32), the checks on when to allow different forms of
3214 "control" were broken. There should now be diagnostics for all cases when a
3215 control that does not make sense is encountered.
3217 9. Added the /retain_sender option to "control=submission".
3219 10. $recipients is now available in the predata ACL (oversight).
3221 11. Tidy the search cache before the fork to do a delivery from a message
3222 received from the command line. Otherwise the child will trigger a lookup
3223 failure and thereby defer the delivery if it tries to use (for example) a
3224 cached ldap connection that the parent has called unbind on.
3226 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3227 of $address_data from the recipient verification was clobbered by the
3228 sender verification.
3230 13. The value of address_data from a sender verification is now available in
3231 $sender_address_data in subsequent conditions in the ACL statement.
3233 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3235 15. Added a new option "connect=<time>" to callout options, to set a different
3238 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3239 was its contents. (It was OK if the option was not defined at all.)
3241 17. A "Completed" log line is now written for messages that are removed from
3242 the spool by the -Mrm option.
3244 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3245 information about exactly what failed.
3247 19. Added -dd to debug only the daemon process.
3249 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3250 handles timeouts, both on the server side and network timeouts. Renamed the
3251 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3253 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3254 It is now set to "smtps".
3256 22. $host_address is now set to the target address during the checking of
3257 ignore_target_hosts.
3259 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3260 being passed; this would have caused $sender_host_name to have been used if
3261 matching the list had actually called for a host name (not very likely,
3262 since this list is usually IP addresses). A host name is now passed as
3265 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3266 code that specifies a non-restarting handler (typically sigaction() in
3267 modern systems) in an attempt to fix a rare and obscure crash bug.
3269 25. Narrowed the window for a race in the daemon that could cause it to ignore
3270 SIGCHLD signals. This is not a major problem, because they are used only to
3271 wake it up if nothing else does.
3273 26. A malformed maildirsize file could cause Exim to calculate negative values
3274 for the mailbox size or file count. Odd effects could occur as a result.
3275 The maildirsize information is now recalculated if the size or filecount
3278 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3279 support for a long time. Removed HAVE_SYS_VFS_H.
3281 28. Installed the latest version of exipick from John Jetmore.
3283 29. In an address list, if the pattern was not a regular expression, an empty
3284 subject address (from a bounce message) matched only if the pattern was an
3285 empty string. Non-empty patterns were not even tested. This was the wrong
3286 because it is perfectly reasonable to use an empty address as part of a
3287 database query. An empty address is now tested by patterns that are
3288 lookups. However, all the other forms of pattern expect the subject to
3289 contain a local part and a domain, and therefore, for them, an empty
3290 address still always fails if the pattern is not itself empty.
3292 30. Exim went into a mad DNS loop when attempting to do a callout where the
3293 host was specified on an smtp transport, and looking it up yielded more
3294 than one IP address.
3296 31. Re-factored the code for checking spool and log partition space into a
3297 function that finds that data and another that does the check. The former
3298 is then used to implement four new variables: $spool_space, $log_space,
3299 $spool_inodes, and $log_inodes.
3301 32. The RFC2047 encoding function was originally intended for short strings
3302 such as real names; it was not keeping to the 75-character limit for
3303 encoded words that the RFC imposes. It now respects the limit, and
3304 generates multiple encoded words if necessary. To be on the safe side, I
3305 have increased the buffer size for the ${rfc2047: expansion operator from
3308 33. It is now permitted to omit both strings after an "if" condition; if the
3309 condition is true, the result is "true". As before, when the second string
3310 is omitted, a false condition yields an empty string. This makes it less
3311 cumbersome to write custom ACL and router conditions.
3313 34. Failure to deliver a bounce message always caused it to be frozen, even if
3314 there was an errors_to setting on the router. The errors_to setting is now
3317 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3318 canonical form (fully expanded) before being placed in
3319 $sender_host_address.
3321 36. The table in the code that translates DNS record types into text (T_A to
3322 "A" for instance) was missing entries for NS and CNAME. It is just possible
3323 that this could have caused confusion if both these types were looked up
3324 for the same domain, because the text type is used as part of Exim's
3325 per-process caching. But the chance of anyone hitting this buglet seems
3328 37. The dnsdb lookup has been extended in a number of ways.
3330 (1) There is a new type, "zns", which walks up the domain tree until it
3331 finds some nameserver records. It should be used with care.
3333 (2) There is a new type, "mxh", which is like "mx" except that it returns
3334 just the host names, not the priorities.
3336 (3) It is now possible to give a list of domains (or IP addresses) to be
3337 looked up. The behaviour when one of the lookups defers can be
3338 controlled by a keyword.
3340 (4) It is now possible to specify the separator character for use when
3341 multiple records are returned.
3343 38. The dnslists ACL condition has been extended: it is now possible to supply
3344 a list of IP addresses and/or domains to be looked up in a particular DNS
3347 39. Added log_selector=+queue_time_overall.
3349 40. When running the queue in the test harness, wait just a tad after forking a
3350 delivery process, to get repeatability of debugging output.
3352 41. Include certificate and key file names in error message when GnuTLS fails
3353 to set them up, because the GnuTLS error message doesn't include the name
3354 of the failing file when there is a problem reading it.
3356 42. Allow both -bf and -bF in the same test run.
3358 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3360 44. The "Exiscan patch" is now merged into the mainline Exim source.
3362 45. Sometimes the final signoff response after QUIT could fail to get
3363 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3364 < 0 before doing a fflush(). This bug looks as though it goes back to the
3365 introduction of TLS in release 3.20, but "sometimes" must have been rare
3366 because the tests only now provoked it.
3368 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3369 (this can affect the format of dates).
3371 47. exim_tidydb, when checking for the continued existence of a message for
3372 which it has found a message-specific retry record, was not finding
3373 messages that were in split spool directories. Consequently, it was
3374 deleting retry records that should have stayed in existence.
3376 48. Steve fixed some bugs in eximstats.
3378 49. The SPA authentication driver was not abandoning authentication and moving
3379 on to the next authenticator when an expansion was forced to fail,
3380 contradicting the general specification for all authenticators. Instead it
3381 was generating a temporary error. It now behaves as specified.
3383 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3384 (the order specifies the preference for clients). The order is now AES256,
3385 AES128, 3DES, ARCFOUR128.
3387 51. Small patch to Sieve code - explicitly set From: when generating an
3390 52. Exim crashed if a remote delivery caused a very long error message to be
3391 recorded - for instance if somebody sent an entire SpamAssassin report back
3392 as a large number of 550 error lines. This bug was coincidentally fixed by
3393 increasing the size of one of Exim's internal buffers (big_buffer) that
3394 happened as part of the Exiscan merge. However, to be on the safe side, I
3395 have made the code more robust (and fixed the comments that describe what
3398 53. Now that there can be additional text after "Completed" in log lines (if
3399 the queue_time_overall log selector is set), a one-byte patch to exigrep
3400 was needed to allow it to recognize "Completed" as not the last thing in
3403 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3404 patch that reportedly fixes this has been added. I am not expert enough to
3405 create a test for it. This is what the patch creator wrote:
3407 "I found a little strange behaviour of ldap code when working with
3408 Windows 2003 AD Domain, where users was placed in more than one
3409 Organization Units. When I tried to give exim partial DN, the exit code
3410 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3411 But simultaneously result of request was absolutely normal ldap result,
3412 so I produce this patch..."
3414 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3415 REFERENCE, so I have modified the code to exclude the patch when that macro
3418 55. Some experimental protocols are using DNS PTR records for new purposes. The
3419 keys for these records are domain names, not reversed IP addresses. The
3420 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3421 leaves it alone. Component reversal etc. now happens only for IP addresses.
3424 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3426 57. Double the size of the debug message buffer (to 2048) so that more of very
3427 long debug lines gets shown.
3429 58. The exicyclog utility now does better if the number of log files to keep
3430 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3432 59. Two changes related to the smtp_active_hostname option:
3434 (1) $smtp_active_hostname is now available as a variable.
3435 (2) The default for smtp_banner uses $smtp_active_hostname instead
3436 of $primary_hostname.
3438 60. The host_aton() function is supposed to be passed a string that is known
3439 to be a valid IP address. However, in the case of IPv6 addresses, it was
3440 not checking this. This is a hostage to fortune. Exim now panics and dies
3441 if the condition is not met. A case was found where this could be provoked
3442 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3443 components; fortuitously, this particular loophole had already been fixed
3444 by change 4.50/55 above.
3446 If there are any other similar loopholes, the new check in host_aton()
3447 itself should stop them being exploited. The report I received stated that
3448 data on the command line could provoke the exploit when Exim was running as
3449 exim, but did not say which command line option was involved. All I could
3450 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3451 running as the user.
3454 61. There was a buffer overflow vulnerability in the SPA authentication code
3455 (which came originally from the Samba project). I have added a test to the
3456 spa_base64_to_bits() function which I hope fixes it.
3459 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3460 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3462 63. The daemon start-up calls getloadavg() while still root for those OS that
3463 need the first call to be done as root, but it missed one case: when
3464 deliver_queue_load_max is set with deliver_drop_privilege. This is
3465 necessary for the benefit of the queue runner, because there is no re-exec
3466 when deliver_drop_privilege is set.
3468 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3469 This has been fixed.
3471 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3472 was in use, was not putting the data itself into the right store pool;
3473 consequently, it could be overwritten for a subsequent message in the same
3474 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3477 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3479 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3480 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3481 the function were treating the return as a boolean value, which happened to
3482 work because 0=false and not-0=true, but is not correct code.
3484 68. The host_aton() function was not handling scoped IPv6 addresses (those
3485 with, for example, "%eth0" on the end) correctly.
3487 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3488 negated items (that is, ~something) in unsigned ints. Some compilers
3489 apparently mutter when there is no cast.
3491 70. If an address verification called from an ACL failed, and did not produce a
3492 user-specific message (i.e. there was only a "system" message), nothing was
3493 put in $acl_verify_message. In this situation, it now puts the system
3496 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3497 session; change 4.31/43 added the unwanted input to the log line - except
3498 that it did not do this in the start of session case. It now does.
3500 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3501 This is wrong and can cause the other end to generate a synchronization
3502 error if it is another Exim or anything else that does the synchronization
3503 check. A QUIT command is no longer sent after a timeout.
3505 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3506 during host lookups.
3508 74. The defer_ok option of callout verification was not working if it was used
3509 when verifying addresses in header lines, that is, for this case:
3511 verify = header_sender/callout=defer_ok
3513 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3514 those file descriptors could be used for SMTP connections. If anything
3515 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3516 could be sent to the SMTP client, causing chaos. The daemon now opens
3517 stdin, stdout, and stderr to /dev/null when it puts itself into the
3520 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3521 log by default. The user can override this with suitable Perl magic.
3523 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3524 the log message when discard triggers, was not working for the DATA ACL or
3525 for the non-SMTP ACL.
3527 78. Error message wording change in sieve.c.
3529 79. If smtp_accept_max_per_host was set, the number of connections could be
3530 restricted to fewer than expected, because the daemon was trying to set up
3531 a new connection before checking whether the processes handling previous
3532 connections had finished. The check for completed processes is now done
3533 earlier. On busy systems, this bug wouldn't be noticed because something
3534 else would have woken the daemon, and it would have reaped the completed
3537 80. If a message was submitted locally by a user whose login name contained one
3538 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3539 It caused a spool format error. I have fixed the spool reading code. A
3540 related problem was that the "from" clause in the Received: line became
3541 illegal because of the space(s). It is now covered by ${quote_local_part.
3543 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3546 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3548 83. Patch from Sieve maintainer to fix unterminated string problem in
3549 "vacation" handling.
3551 84. Some minor changes to the Linux configuration files to help with other
3552 OS variants using glibc.
3554 85. One more patch for Sieve to update vacation handling to latest spec.
3557 ----------------------------------------------------
3558 See the note above about the 4.44 and 4.50 releases.
3559 ----------------------------------------------------
3565 1. Change 4.43/35 introduced a bug that caused file counts to be
3566 incorrectly computed when quota_filecount was set in an appendfile
3569 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3570 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3573 3. Give more explanation in the error message when the command for a transport
3574 filter fails to execute.
3576 4. There are several places where Exim runs a non-Exim command in a
3577 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3578 was being done only for the command run by the queryprogram router. It is
3579 now done for all such subprocesses. The other cases are: ${run, transport
3580 filters, and the commands run by the lmtp and pipe transports.
3582 5. Some older OS have a limit of 256 on the maximum number of file
3583 descriptors. Exim was using setrlimit() to set 1000 as a large value
3584 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3585 systems. I've change it so that if it can't get 1000, it tries for 256.
3587 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3588 was an oversight, and furthermore, ever since the addition of extra
3589 controls (e.g. 4.43/32), the checks on when to allow different forms of
3590 "control" were broken. There should now be diagnostics for all cases when a
3591 control that does not make sense is encountered.
3593 7. $recipients is now available in the predata ACL (oversight).
3595 8. Tidy the search cache before the fork to do a delivery from a message
3596 received from the command line. Otherwise the child will trigger a lookup
3597 failure and thereby defer the delivery if it tries to use (for example) a
3598 cached ldap connection that the parent has called unbind on.
3600 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3601 of $address_data from the recipient verification was clobbered by the
3602 sender verification.
3604 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3605 was its contents. (It was OK if the option was not defined at all.)
3607 11. A "Completed" log line is now written for messages that are removed from
3608 the spool by the -Mrm option.
3610 12. $host_address is now set to the target address during the checking of
3611 ignore_target_hosts.
3613 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3614 being passed; this would have caused $sender_host_name to have been used if
3615 matching the list had actually called for a host name (not very likely,
3616 since this list is usually IP addresses). A host name is now passed as
3619 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3620 code that specifies a non-restarting handler (typically sigaction() in
3621 modern systems) in an attempt to fix a rare and obscure crash bug.
3623 15. Narrowed the window for a race in the daemon that could cause it to ignore
3624 SIGCHLD signals. This is not a major problem, because they are used only to
3625 wake it up if nothing else does.
3627 16. A malformed maildirsize file could cause Exim to calculate negative values
3628 for the mailbox size or file count. Odd effects could occur as a result.
3629 The maildirsize information is now recalculated if the size or filecount
3632 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3633 support for a long time. Removed HAVE_SYS_VFS_H.
3635 18. Updated exipick to current release from John Jetmore.
3637 19. Allow an empty sender to be matched against a lookup in an address list.
3638 Previously the only cases considered were a regular expression, or an
3641 20. Exim went into a mad DNS lookup loop when doing a callout where the
3642 host was specified on the transport, if the DNS lookup yielded more than
3645 21. The RFC2047 encoding function was originally intended for short strings
3646 such as real names; it was not keeping to the 75-character limit for
3647 encoded words that the RFC imposes. It now respects the limit, and
3648 generates multiple encoded words if necessary. To be on the safe side, I
3649 have increased the buffer size for the ${rfc2047: expansion operator from
3652 22. Failure to deliver a bounce message always caused it to be frozen, even if
3653 there was an errors_to setting on the router. The errors_to setting is now
3656 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3657 canonical form (fully expanded) before being placed in
3658 $sender_host_address.
3660 24. Updated eximstats to version 1.33
3662 25. Include certificate and key file names in error message when GnuTLS fails
3663 to set them up, because the GnuTLS error message doesn't include the name
3664 of the failing file when there is a problem reading it.
3666 26. Expand error message when OpenSSL has problems setting up cert/key files.
3669 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3670 (this can affect the format of dates).
3672 28. exim_tidydb, when checking for the continued existence of a message for
3673 which it has found a message-specific retry record, was not finding
3674 messages that were in split spool directories. Consequently, it was
3675 deleting retry records that should have stayed in existence.
3677 29. eximstats updated to version 1.35
3678 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3679 1.35 - bugfix such that pie charts by volume are generated correctly
3681 30. The SPA authentication driver was not abandoning authentication and moving
3682 on to the next authenticator when an expansion was forced to fail,
3683 contradicting the general specification for all authenticators. Instead it
3684 was generating a temporary error. It now behaves as specified.
3686 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3687 (the order specifies the preference for clients). The order is now AES256,
3688 AES128, 3DES, ARCFOUR128.
3690 31. Small patch to Sieve code - explicitly set From: when generating an
3693 32. Exim crashed if a remote delivery caused a very long error message to be
3694 recorded - for instance if somebody sent an entire SpamAssassin report back
3695 as a large number of 550 error lines. This bug was coincidentally fixed by
3696 increasing the size of one of Exim's internal buffers (big_buffer) that
3697 happened as part of the Exiscan merge. However, to be on the safe side, I
3698 have made the code more robust (and fixed the comments that describe what
3701 33. Some experimental protocols are using DNS PTR records for new purposes. The
3702 keys for these records are domain names, not reversed IP addresses. The
3703 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3704 leaves it alone. Component reversal etc. now happens only for IP addresses.
3707 34. The host_aton() function is supposed to be passed a string that is known
3708 to be a valid IP address. However, in the case of IPv6 addresses, it was
3709 not checking this. This is a hostage to fortune. Exim now panics and dies
3710 if the condition is not met. A case was found where this could be provoked
3711 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3712 components; fortuitously, this particular loophole had already been fixed
3713 by change 4.50/55 or 4.44/33 above.
3715 If there are any other similar loopholes, the new check in host_aton()
3716 itself should stop them being exploited. The report I received stated that
3717 data on the command line could provoke the exploit when Exim was running as
3718 exim, but did not say which command line option was involved. All I could
3719 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3720 running as the user.
3723 35. There was a buffer overflow vulnerability in the SPA authentication code
3724 (which came originally from the Samba project). I have added a test to the
3725 spa_base64_to_bits() function which I hope fixes it.
3728 36. The daemon start-up calls getloadavg() while still root for those OS that
3729 need the first call to be done as root, but it missed one case: when
3730 deliver_queue_load_max is set with deliver_drop_privilege. This is
3731 necessary for the benefit of the queue runner, because there is no re-exec
3732 when deliver_drop_privilege is set.
3734 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3735 was in use, was not putting the data itself into the right store pool;
3736 consequently, it could be overwritten for a subsequent message in the same
3737 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3740 38. Sometimes the final signoff response after QUIT could fail to get
3741 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3742 < 0 before doing a fflush(). This bug looks as though it goes back to the
3743 introduction of TLS in release 3.20, but "sometimes" must have been rare
3744 because the tests only now provoked it.
3750 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3751 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3752 Now it returns an integer. A number of calls were still expecting a T/F
3753 return. Fortuitously, in all cases, the tests worked in OK situations,
3754 which is the norm. However, things would have gone wrong on any write
3755 failures on the smtp file descriptor. This function is used when sending
3756 messages over SMTP and also when doing verify callouts.
3758 2. When Exim is called to do synchronous delivery of a locally submitted
3759 message (the -odf or -odi options), it no longer closes stderr before doing
3762 3. Implemented the mua_wrapper option.
3764 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3766 5. Implemented the functions header_remove(), header_testname(),
3767 header_add_at_position(), and receive_remove_recipient(), and exported them
3770 6. If an ACL "warn" statement specified the addition of headers, Exim already
3771 inserted X-ACL-Warn: at the start if there was no header name. However, it
3772 was not making this test for the second and subsequent header lines if
3773 there were newlines in the string. This meant that an invalid header could
3774 be inserted if Exim was badly configured.
3776 7. Allow an ACL "warn" statement to add header lines at the start or after all
3777 the Received: headers, as well as at the end.
3779 8. Added the rcpt_4xx retry error code.
3781 9. Added postmaster_mailfrom=xxx to callout verification option.
3783 10. Added mailfrom=xxxx to the callout verification option, for verify=
3786 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3787 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3789 12. Inserted some casts to stop certain compilers warning when using pointer
3790 differences as field lengths or precisions in printf-type calls (mostly
3791 affecting debugging statements).
3793 13. Added optional readline() support for -be (dynamically loaded).
3795 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3796 same clock tick as a message's arrival, so that its received time was the
3797 same as the "first fail" time on the retry record, and that message
3798 remained on the queue past the ultimate address timeout, every queue runner
3799 would try a delivery (because it was past the ultimate address timeout) but
3800 after another failure, the ultimate address timeout, which should have then
3801 bounced the address, did not kick in. This was a "< instead of <=" error;
3802 in most cases the first failure would have been in the next clock tick
3803 after the received time, and all would be well.
3805 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3806 being recognized when the domain list was tested by the match_domain
3807 condition in an expansion string.
3809 16. Added the ${str2b64: operator.
3811 17. Exim was always calling setrlimit() to set a large limit for the number of
3812 processes, without checking whether the existing limit was already
3813 adequate. (It did check for the limit on file descriptors.) Furthermore,
3814 errors from getrlimit() and setrlimit() were being ignored. Now they are
3815 logged to the main and panic logs, but Exim does carry on, to try to do its
3816 job under whatever limits there are.
3818 18. Imported PCRE 5.0.
3820 19. Trivial typo in log message " temporarily refused connection" (the leading
3823 20. If the log selector return_path_on_delivery was set and an address was
3824 redirected to /dev/null, the delivery process crashed because it assumed
3825 that a return path would always be set for a "successful" delivery. In this
3826 case, the whole delivery is bypassed as an optimization, and therefore no
3829 21. Internal re-arrangement: the function for sending a challenge and reading
3830 a response while authentication was assuming a zero-terminated challenge
3831 string. It's now changed to take a pointer and a length, to allow for
3832 binary data in such strings.
3834 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3836 23. Exim was not respecting finduser_retries when seeking the login of the
3837 uid under which it was called; it was always trying 10 times. (The default
3838 setting of finduser_retries is zero.) Also, it was sleeping after the final
3839 failure, which is pointless.
3841 24. Implemented tls_on_connect_ports.
3843 25. Implemented acl_smtp_predata.
3845 26. If the domain in control=submission is set empty, Exim assumes that the
3846 authenticated id is a complete email address when it generates From: or
3847 Sender: header lines.
3849 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3850 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3851 chown and chgrp in /bin and hostname in /usr/bin.
3853 28. Exim was keeping the "process log" file open after each use, just as it
3854 does for the main log. This opens the possibility of it remaining open for
3855 long periods when the USR1 signal hits a daemon. Occasional processlog
3856 errors were reported, that could have been caused by this. Anyway, it seems
3857 much more sensible not to leave this file open at all, so that is what now
3860 29. The long-running daemon process does not normally write to the log once it
3861 has entered its main loop, and it closes the log before doing so. This is
3862 so that log files can straightforwardly be renamed and moved. However,
3863 there are a couple of unusual error situations where the daemon does write
3864 log entries, and I had neglected to close the log afterwards.
3866 30. The text of an SMTP error response that was received during a remote
3867 delivery was being truncated at 512 bytes. This is too short for some of
3868 the long messages that one sometimes sees. I've increased the limit to
3871 31. It is now possible to make retry rules that apply only when a message has a
3872 specific sender, in particular, an empty sender.
3874 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3875 it possible to be selective about when SMTP synchronization is enforced.
3877 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3879 32. Implemented hosts_connection_nolog.
3881 33. Added an ACL for QUIT.
3883 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3886 35. Added mailbox_size and mailbox_filecount to appendfile.
3888 36. Added control = no_multiline_responses to ACLs.
3890 37. There was a bug in the logic of the code that waits for the clock to tick
3891 in the case where the clock went backwards by a substantial amount such
3892 that the microsecond fraction of "now" was more than the microsecond
3893 fraction of "then" (but the whole seconds number was less).
3895 38. Added support for the libradius Radius client library this is found on
3896 FreeBSD (previously only the radiusclient library was supported).
3902 1. When certain lookups returned multiple values in the form name=value, the
3903 quoting of the values was not always being done properly. Specifically:
3904 (a) If the value started with a double quote, but contained no whitespace,
3906 (b) If the value contained whitespace other than a space character (i.e.
3907 tabs or newlines or carriage returns) it was not quoted.
3908 This fix has been applied to the mysql and pgsql lookups by writing a
3909 separate quoting function and calling it from the lookup code. The fix
3910 should probably also be applied to nisplus, ibase and oracle lookups, but
3911 since I cannot test any of those, I have not disturbed their existing code.
3913 2. A hit in the callout cache for a specific address caused a log line with no
3914 reason for rejecting RCPT. Now it says "Previous (cached) callout
3915 verification failure".
3917 3. There was an off-by-one bug in the queryprogram router. An over-long
3918 return line was truncated at 256 instead of 255 characters, thereby
3919 overflowing its buffer with the terminating zero. As well as fixing this, I
3920 have increased the buffer size to 1024 (and made a note to document this).
3922 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3923 when Exim is waiting for an SMTP response from a remote server, Exim
3924 restarts its select() call on the socket, thereby resetting its timeout.
3925 This is not a problem when such interrupts are rare. Somebody set up a cron
3926 job to run exiwhat every 2 minutes, which is less than the normal select()
3927 timeout (5 or 10 minutes). This meant that the select() timeout never
3928 kicked in because it was always reset. I have fixed this by comparing the
3929 time when an interrupt arrives with the time at the start of the first call
3930 to select(). If more time than the timeout has elapsed, the interrupt is
3931 treated as a timeout.
3933 5. Some internal re-factoring in preparation for the addition of Sieve
3934 extensions (by MH). In particular, the "personal" test is moved to a
3935 separate function, and given an option for scanning Cc: and Bcc: (which is
3936 not set for Exim filters).
3938 6. When Exim created an email address using the login of the caller as the
3939 local part (e.g. when creating a From: or Sender: header line), it was not
3940 quoting the local part when it contained special characters such as @.
3942 7. Installed new OpenBSD configuration files.
3944 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3945 try to make them clearer.
3947 9. Callout options, other than the timeout value, were being ignored when
3948 verifying sender addresses in header lines. For example, when using
3950 verify = header_sender/callout=no_cache
3952 the cache was (incorrectly) being used.
3954 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3955 only the Cygwin environment.
3957 11. When return_path_on_delivery was set as a log selector, if different remote
3958 addresses in the same message used different return paths and parallel
3959 remote delivery occurred, the wrong values would sometimes be logged.
3960 (Whenever a remote delivery process finished, the return path value from
3961 the most recently started remote delivery process was logged.)
3963 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3964 lines when AUTH and/or TLS are in use. This is the "received protocol"
3965 field. Exim used to use "asmtp" for authenticated SMTP, without any
3966 indication (in the protocol name) for TLS use. Now it follows the RFC and
3967 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3968 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3969 names appear in log lines as well as in Received: header lines.
3971 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3972 extensions, and comparison tests, and to fix some bugs.
3974 14. Changes to the "personal" filter test:
3976 (1) The test was buggy in that it was just doing the equivalent of
3977 "contains" tests on header lines. For example, if a user's address was
3978 anne@some.where, the "personal" test would incorrectly be true for
3980 To: susanne@some.where
3982 This test is now done by extracting each address from the header in turn,
3983 and checking the entire address. Other tests that are part of "personal"
3984 are now done using regular expressions (for example, to check local parts
3985 of addresses in From: header lines).
3987 (2) The list of non-personal local parts in From: addresses has been
3988 extended to include "listserv", "majordomo", "*-request", and "owner-*",
3989 taken from the Sieve specification recommendations.
3991 (3) If the message contains any header line starting with "List-" it is
3992 treated as non-personal.
3994 (4) The test for "circular" in the Subject: header line has been removed
3995 because it now seems ill-conceived.
3997 15. Minor typos in src/EDITME comments corrected.
3999 16. Installed latest exipick from John Jetmore.
4001 17. If headers_add on a router specified a text string that was too long for
4002 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4003 of string_sprintf() is now avoided.
4005 18. $message_body_size was not set (it was always zero) when running the DATA
4006 ACL and the local_scan() function.
4008 19. For the "mail" command in an Exim filter, no default was being set for
4009 the once_repeat time, causing a random time value to be used if "once" was
4010 specified. (If the value happened to be <= 0, no repeat happened.) The
4011 default is now 0s, meaning "never repeat". The "vacation" command was OK
4012 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4013 (I found it when inspecting the code).
4015 20. There is now an overall timeout for performing a callout verification. It
4016 defaults to 4 times the callout timeout, which applies to individual SMTP
4017 commands during the callout. The overall timeout applies when there is more
4018 than one host that can be tried. The timeout is checked before trying the
4019 next host. This prevents very long delays if there are a large number of
4020 hosts and all are timing out (e.g. when the network connections are timing
4021 out). The value of the overall timeout can be changed by specifying an
4022 additional sub-option for "callout", called "maxwait". For example:
4024 verify = sender/callout=5s,maxwait=20s
4026 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4027 to the end before writing, but this should make it even safer).
4029 22. Exim was forgetting that it had advertised PIPELINING for the second and
4030 subsequent messages on an SMTP connection. It was also not resetting its
4031 memory on STARTTLS and an internal HELO.
4033 23. When Exim logs an SMTP synchronization error within a session, it now
4034 records whether PIPELINING has been advertised or not.
4036 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4037 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4038 rather than long int.
4040 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4042 26. Added the never_mail option to autoreply.
4048 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4049 crash if the getsockname() call failed; this can happen if a connection is
4050 closed very soon after it is established. The problem was simply in the
4051 order in which certain operations were done, causing Exim to try to write
4052 to the SMTP stream before it had set up the file descriptor. The bug has
4053 been fixed by making things happen in the correct order.
4059 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4060 before the connection was closed, thus losing the rejection response.
4062 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4063 some early Solaris releases, but causes trouble in current releases where
4064 socklen_t is defined.
4066 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4069 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4072 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4073 that releasing the top of it at the end releases what was used for sub-
4074 expansions (unless the block got too big). However, discard this block if
4075 the first thing is a variable or header, so that we can use its block when
4076 it is dynamic (useful for very large $message_headers, for example).
4078 6. Lookups now cache *every* query, not just the most recent. A new, separate
4079 store pool is used for this. It can be recovered when all lookup caches are
4080 flushed. Lookups now release memory at the end of their result strings.
4081 This has involved some general refactoring of the lookup sources.
4083 7. Some code has been added to the store_xxx() functions to reduce the amount
4084 of flapping under certain conditions.
4086 8. log_incoming_interface used to affect only the <= reception log lines. Now
4087 it causes the local interface and port to be added to several more SMTP log
4088 lines, for example "SMTP connection from", and rejection lines.
4090 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4092 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4094 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4095 could be overwritten at the end of the current message (or the start of a
4096 new message if it was set in a HELO ACL). The value is now preserved for
4097 the duration of the SMTP connection.
4099 12. If a transport had a headers_rewrite setting, and a matching header line
4100 contained an unqualified address, that address was qualified, even if it
4101 did not match any rewriting rules. The underlying bug was that the values
4102 of the flags that permit the existence of unqualified sender and recipient
4103 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4104 non-local messages, and by -bnq for local messages) were not being
4105 preserved with the message after it was received.
4107 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4108 "next input=" as part of the text comprising the host identity instead of
4109 the correct text. The code was using the same buffer for two different
4110 strings. However, depending on which order the printing function evaluated
4111 its arguments, the bug did not always show up. Under Linux, for example, my
4112 test suite worked just fine.
4114 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4115 doesn't work with some older versions of Perl. It has been changed to "my",
4116 which in any case is probably the better facility to use.
4118 15. A really picky compiler found some instances of statements for creating
4119 error messages that either had too many or two few arguments for the format
4122 16. The size of the buffer for calls to the DNS resolver has been increased
4123 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4124 for addresses that have a lot of PTR records. This alleviates a problem; it
4125 does not fully solve it.
4127 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4128 buffer now truncates the list and logs the incident, which is the same
4129 action as happens when Exim is looking up a host name and its aliases.
4130 Previously in this situation something unpredictable would happen;
4131 sometimes it was "internal error: store_reset failed".
4133 18. If a server dropped the connection unexpectedly when an Exim client was
4134 using GnuTLS and trying to read a response, the client delivery process
4135 crashed while trying to generate an error log message.
4137 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4138 string, for example:
4140 warn message = H1: something\nH2: something
4142 the text was added as a single header line from Exim's point of view
4143 though it ended up OK in the delivered message. However, searching for the
4144 second and subsequent header lines using $h_h2: did not work. This has been
4145 fixed. Similarly, if a system filter added multiple headers in this way,
4146 the routers could not see them.
4148 20. Expanded the error message when iplsearch is called with an invalid key to
4149 suggest using net-iplsearch in a host list.
4151 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4152 ACLs are no longer actually imposed (and a message to that effect is
4155 22. If a "gecos" field in a passwd entry contained escaped characters, in
4156 particular, if it contained a \" sequence, Exim got it wrong when building
4157 a From: or a Sender: header from that name. A second bug also caused
4158 incorrect handling when an unquoted " was present following a character
4159 that needed quoting.
4161 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4162 was not being matched caselessly.
4164 24. Arranged for all hyphens in the exim.8 source to be escaped with
4167 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4168 properly. Recipient callout cache records were still being keyed to include
4169 the sender, even when use_sender was set false. This led to far more
4170 callouts that were necessary. The sender is no longer included in the key
4171 when use_sender is false.
4173 26. Added "control = submission" modifier to ACLs.
4175 27. Added the ${base62d: operator to decode base 62 numbers.
4177 28. dnsdb lookups can now access SRV records.
4179 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4180 the configuration file.
4182 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4183 (-v) mode. This makes the output for a verbose queue run more intelligible.
4185 31. Added a use_postmaster feature to recipient callouts.
4187 32. Added the $body_zerocount variable, containing the number of binary zero
4188 bytes in the message body.
4190 33. The time of last modification of the "new" subdirectory is now used as the
4191 "mailbox time last read" when there is a quota error for a maildir
4194 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4196 35. Added +ignore_unknown as a special item in host lists.
4198 36. Code for decoding IPv6 addresses in host lists is now included, even if
4199 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4200 address was recognized as an IP address, but was then not correctly decoded
4201 into binary, causing unexpected and incorrect effects when compared with
4208 1. Very minor rewording of debugging text in manualroute to say "list of
4209 hosts" instead of "hostlist".
4211 2. If verify=header_syntax was set, and a header line with an unqualified
4212 address (no domain) and a large number of spaces between the end of the
4213 name and the colon was received, the reception process suffered a buffer
4214 overflow, and (when I tested it) crashed. This was caused by some obsolete
4215 code that should have been removed. The fix is to remove it!
4217 3. When running in the test harness, delay a bit after writing a bounce
4218 message to get a bit more predictability in the log output.
4220 4. Added a call to search_tidyup() just before forking a reception process. In
4221 theory, someone could use a lookup in the expansion of smtp_accept_max_
4222 per_host which, without the tidyup, could leave open a database connection.
4224 5. Added the variables $recipient_data and $sender_data which get set from a
4225 lookup success in an ACL "recipients" or "senders" condition, or a router
4226 "senders" option, similar to $domain_data and $local_part_data.
4228 6. Moved the writing of debug_print from before to after the "senders" test
4231 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4232 problems for message scanning, either using a data ACL, or using
4233 local_scan() because the Received: header was not generated till after they
4234 were called (in order to set the time as the time of reception completion).
4235 I have revised the way this works. The header is now generated after the
4236 body is received, but before the ACL or local_scan() are called. After they
4237 are run, the timestamp in the header is updated.
4243 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4244 before starting a queue runner without re-exec. This happened only when
4245 deliver_drop_privilege was set or when the Exim user was set to root. The
4246 effect of the bug was that timeouts during subsequent deliveries caused
4247 crashes instead of being properly handled. The handler is now left at its
4248 default (and expected) setting.
4250 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4251 message, again when deliver_drop_privilege is set or Exim is run as root.
4252 The bug described in (1) was not present in this case, but the tidying up
4253 of the other signals was missing. I have made the two cases consistent.
4255 3. The ignore_target_hosts setting on a manualroute router was being ignored
4256 for hosts that were looked up using the /MX notation.
4258 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4261 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4262 operated on the sender address. After changing the $sender_address to <>
4263 for the sender address verify, Exim was re-instated it as the original
4264 (before rewriting) address, but remembering that it had rewritten it, so it
4265 wasn't rewriting it again. This bug also had the effect of breaking the
4266 sender address verification caching when the sender address was rewritten.
4268 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4269 This has been changed so that if the ip literal address matches
4270 ignore_target_hosts, the router declines.
4272 7. Added expansion conditions match_domain, match_address, and match_local_
4273 part (NOT match_host).
4275 8. The placeholder for the Received: header didn't have a length field set.
4277 9. Added code to Exim itself and to exim_lock to test for a specific race
4278 condition that could lead to file corruption when using MBX delivery. The
4279 issue is with the lockfile that is created in /tmp. If this file is removed
4280 after a process has opened it but before that process has acquired a lock,
4281 there is the potential for a second process to recreate the file and also
4282 acquire a lock. This could lead to two Exim processes writing to the file
4283 at the same time. The added code performs the same test as UW imapd; it
4284 checks after acquiring the lock that its file descriptor still refers to
4285 the same named file.
4287 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4288 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4291 11. Added the smtp_active_hostname option. If used, this will typically be made
4292 to depend on the incoming interface address. Because $interface_address is
4293 not set up until the daemon has forked a reception process, error responses
4294 that can happen earlier (such as "too many connections") no longer contain
4297 12. If an expansion in a condition on a "warn" statement fails because a lookup
4298 defers, the "warn" statement is abandoned, and the next ACL statement is
4299 processed. Previously this caused the whole ACL to be aborted.
4301 13. Added the iplsearch lookup type.
4303 14. Added ident_timeout as a log selector.
4305 15. Added tls_certificate_verified as a log selector.
4307 16. Added a global option tls_require_ciphers (compare the smtp transport
4308 option of the same name). This controls incoming TLS connections.
4310 17. I finally figured out how to make tls_require_ciphers do a similar thing
4311 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4312 before starting the TLS session.
4314 18. Tabs are now shown as \t in -bP output.
4316 19. If the log selector return_path_on_delivery was set, Exim crashed when
4317 bouncing a message because it had too many Received: header lines.
4319 20. If two routers both had headers_remove settings, and the first one included
4320 a superfluous trailing colon, the final name in the first list and the
4321 first name in the second list were incorrectly joined into one item (with a
4322 colon in the middle).
4328 1. Added -C and -D options to the exinext utility, mainly to make it easier
4329 to include in the automated testing, but these could be helpful when
4330 multiple configurations are in use.
4332 2. The exinext utility was not formatting the output nicely when there was
4333 an alternate port involved in the retry record key, nor when there was a
4334 message id as well (for retries that were specific to a specific message
4335 and a specific host). It was also confused by IPv6 addresses, because of
4336 the additional colons they contain. I have fixed the IPv4 problem, and
4337 patched it up to do a reasonable job for IPv6.
4339 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4340 delivery, the log line now contains "pipelined" if PIPELINING was used.
4342 4. An SMTP transport process used to panic and die if the bind() call to set
4343 an explicit outgoing interface failed. This has been changed; it is now
4344 treated in the same way as a connect() failure.
4346 5. A reference to $sender_host_name in the part of a conditional expansion
4347 that was being skipped was still causing a DNS lookup. This no longer
4350 6. The def: expansion condition was not recognizing references to header lines
4351 that used bh_ and bheader_.
4353 7. Added the _cache feature to named lists.
4355 8. The code for checking quota_filecount in the appendfile transport was
4356 allowing one more file than it should have been.
4358 9. For compatibility with Sendmail, the command line option
4366 and sets the incoming protocol and host name (for trusted callers). The
4367 host name and its colon can be omitted when only the protocol is to be set.
4368 Note the Exim already has two private options, -pd and -ps, that refer to
4369 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4370 "s", but I don't think that's a major issue.
4372 10. A number of refactoring changes to the code, none of which should affect
4375 (a) The number of logging options was getting close to filling up the
4376 32-bit word that was used as a bit map. I have split them into two classes:
4377 those that are passed in the argument to log_write(), and those that are
4378 only ever tested independently outside of that function. These are now in
4379 separate 32-bit words, so there is plenty of room for expansion again.
4380 There is no change in the user interface or the logging behaviour.
4382 (b) When building, for example, log lines, the code previously used a
4383 macro that called string_cat() twice, in order to add two strings. This is
4384 not really sufficiently general. Furthermore, there was one instance where
4385 it was actually wrong because one of the argument was used twice, and in
4386 one call a function was used. (As it happened, calling the function twice
4387 did not affect the overall behaviour.) The macro has been replaced by a
4388 function that can join an arbitrary number of extra strings onto a growing
4391 (c) The code for expansion conditions now uses a table and a binary chop
4392 instead of a serial search (which was left over from when there were very
4393 few conditions). Also, it now recognizes conditions like "pam" even when
4394 the relevant support is not compiled in: a suitably worded error message is
4395 given if an attempt is made to use such a condition.
4397 11. Added ${time_interval:xxxxx}.
4399 12. A bug was causing one of the ddress fields not to be passed back correctly
4400 from remote delivery subprocesses. The field in question was not being
4401 subsequently used, so this caused to problems in practice.
4403 13. Added new log selectors queue_time and deliver_time.
4405 14. Might have fixed a bug in maildirsizefile handling that threw up
4406 "unexpected character" debug warnings, and recalculated the data
4407 unnecessarily. In any case, I expanded the warning message to give more
4410 15. Added the message "Restricted characters in address" to the statements in
4411 the default ACL that block characters like @ and % in local parts.
4413 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4414 Three changes have been made:
4416 (a) There was a serious bug; a negative response to MAIL caused the whole
4417 recipient domain to be cached as invalid, thereby blocking all messages
4418 to all local parts at the same domain, from all senders. This bug has
4419 been fixed. The domain is no longer cached after a negative response to
4420 MAIL if the sender used is not empty.
4422 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4425 (c) A new callout option, "use_sender" has been added for people who want
4426 the modified behaviour.
4432 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4435 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4436 indeed breaks things for older releases.
4438 3. Added additional logging to the case where there is a problem reading data
4439 from a filter that is running in a subprocess using a pipe, in order to
4440 try to track down a specific problem.
4442 4. Testing facility fudge: when running in the test harness and attempting
4443 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4444 getting "No route to host". Convert this to a timeout.
4446 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4449 6. Some OS don't have socklen_t but use size_t instead. This affects the
4450 fifth argument of getsockopt() amongst other things. This is now
4451 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4452 can be set for individual OS. I have set it for SunOS5, OSF1, and
4453 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4454 some earlier ones do not.
4456 7. Change 4.30/15 was not doing the test caselessly.
4458 8. The standard form for an IPv6 address literal was being rejected by address
4459 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4460 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4461 this, as well as the form without the "IPv6" on the front (but only when
4462 address literals are enabled, of course).
4464 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4466 10. Exim crashed if a message with an empty sender address specified by -f
4467 encountered a router with an errors_to setting. This could be provoked only
4468 by a command such as
4472 where an empty string was supplied; "<>" did not hit this bug.
4474 11. Installed PCRE release 4.5.
4476 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4477 remained set. It is now erased.
4479 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4480 times from message ids (which are base 36 rather than the normal 62).
4482 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4483 were being counted as actual protocol errors, and logged if the log
4484 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4485 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4486 and DATA following a set of rejected RCPTs do not count as protocol errors.
4487 In other words, Exim assumes they were pipelined, though this may not
4488 actually be the case. Of course, in all cases the client gets an
4489 appropriate error code.
4491 15. If a lookup fails in an ACL condition, a message about the failure may
4492 be available; it is used if testing the ACL cannot continue, because most
4493 such messages specify what the cause of the deferral is. However, some
4494 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4495 that caused an old message to be retained and used if a later statement
4496 caused a defer, replacing the real cause of the deferral.
4498 16. If an IP address had so many PTR records that the DNS lookup buffer
4499 was not large enough to hold them, Exim could crash while trying to process
4500 the truncated data. It now detects and logs this case.
4502 17. Further to 4.21/58, another change has been made: if (and only if) the
4503 first line of a message (the first header line) ends with CRLF, a bare LF
4504 in a subsequent header line has a space inserted after it, so as not to
4505 terminate the header.
4507 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4508 unnecessarily, used atoi() instead of strtol(), and didn't check the
4509 termination when getting file sizes from file names by regex.
4511 19. Completely re-implemented the support for maildirsize files, in the light
4512 of a number of problems with the previous contributed implementation
4513 (4.30/29). In particular:
4515 . If the quota is zero, the maildirsize file is maintained, but no quota is
4518 . If the maildir directory does not exist, it is created before any attempt
4519 to write a maildirsize file.
4521 . The quota value in the file is just a cache; if the quota is changed in
4522 the transport, the new value overrides.
4524 . A regular expression is available for excluding directories from the
4527 20. The autoreply transport checks the characters in options that define the
4528 message's headers; it allows continued headers, but it was checking with
4529 isspace() after an embedded newline instead of explicitly looking for a
4532 21. If all the "regular" hosts to which an address was routed had passed their
4533 expiry times, and had not reached their retry times, the address was
4534 bounced, even if fallback hosts were defined. Now Exim should go on to try
4537 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4538 equivalent code in the SMTP transport. Some hosts send humungous responses
4539 to HELO/EHLO, more than 1024 it seems.
4541 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4542 gives compiler warnings in some environments. I've now done it "properly",
4545 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4546 (because of problems with the built-in one) was declared to return uschar *
4547 instead of char *, causing compiler failure.
4549 25. Fixed a file descriptor leak when processing alias/forward files.
4551 26. Fixed a minor format string issue in dbfn.c.
4553 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4555 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4556 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4559 29. When a sender address is verified, it is cached, to save repeating the test
4560 when there is more than one recipient in a message. However, when the
4561 verification involves a callout, it is possible for different callout
4562 options to be set for different recipients. It is too complicated to keep
4563 track of this in the cache, so now Exim always runs a verification when a
4564 callout is required, relying on the callout cache for the optimization.
4565 The overhead is duplication of the address routing, but this should not be
4568 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4569 to be verified with callout=postmaster, and the main callout worked but the
4570 postmaster check failed, the verification correctly failed. However, if a
4571 subsequent RCPT command asked for sender verification *without* the
4572 postmaster check, incorrect caching caused this verification also to fail,
4575 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4576 it was not caching the DNS options (qualify_single, search_parents) that
4577 were used when the lookup failed. A subsequent lookup with different
4578 options therefore always gave the same answer, though there were cases
4579 where it should not have. (Example: a "domains = !$mx_any" option on a
4580 dnslookup router: the "domains" option is always processed without any
4581 widening, but the router might have qualify_single set.) Now Exim uses the
4582 cached value only when the same options are set.
4584 32. Added John Jetmore's "exipick" utility to the distribution.
4586 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4587 than a timeout (e.g. a certificate is required, and is not provided), an
4588 Exim server now closes the connection immediately. Previously it waited for
4589 the client to close - but if the client is SSL, it seems that they each
4590 wait for each other, leading to a delay before one of them times out.
4592 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4593 maintained 0.8.x compatibility because I don't think many are using it, and
4594 it is clearly obsolete.
4596 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4599 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4600 client certificate was expired. A simple patch fixes this, though I don't
4601 understand the full logic of why the verify callback is called multiple
4604 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4605 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4606 which causes problems with some clients (such as the Certicom SSL Plus
4607 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4608 disables the coutermeasure allowing Eudora to connect."
4610 38. Exim was not checking that a write() to a log file succeeded. This could
4611 lead to Bad Things if a log got too big, in particular if it hit a file
4612 size limit. Exim now panics and dies if it cannot write to a log file, just
4613 as it does if it cannot open a log file.
4615 39. Modified OS/Makefile-Linux so that it now contains
4617 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4619 The two -D definitions ensure that Exim is compiled with large file
4620 support, which makes it possible to handle log files that are bigger than
4623 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4624 instance) a domain was checked against a named list that involved a lookup,
4625 causing $domain_data to be set, then another domain was checked against the
4626 same list, then the first domain was re-checked, the value of $domain_data
4627 after the final check could be wrong. In particular, if the second check
4628 failed, it could be set empty. This bug probably also applied to
4631 41. The strip_trailing_dot option was not being applied to the address given
4632 with the -f command-line option.
4634 42. The code for reading a message's header from the spool was incrementing
4635 $received_count, but never initializing it. This meant that the value was
4636 incorrect (doubled) while delivering a message in the same process in which
4637 it was received. In the most common configuration of Exim, this never
4638 happens - a fresh exec is done - but it can happen when
4639 deliver_drop_privilege is set.
4641 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4642 it now includes up to 150 characters of the unexpected data in the log
4645 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4646 and building data strings. The size of both of these buffers was 10 000
4647 bytes - far larger than anybody would *ever* want, thought I. Needless to
4648 say, somebody hit the limit. I have increased the maximum line length to
4649 20 000 and the maximum data length of concatenated lines to 100 000. I have
4650 also fixed two bugs, because there was no checking on these buffers. Tsk,
4651 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4652 buffer is too small.
4654 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4655 lsearch lookups. Now it does.
4657 46. When parsing a route_list item in a manualroute router, a fixed-length
4658 buffer was used for the list of hosts. I made this 1024 bytes long,
4659 thinking that nobody would ever have a list of hosts that long. Wrong.
4660 Somebody had a whole pile of complicated expansion conditions, and the
4661 string was silently truncated, leading to an expansion error. It turns out
4662 that it is easier to change to an unlimited length (owing to other changes
4663 that have happened since this code was originally written) than to build
4664 structure for giving a limitation error. The length of the item that
4665 expands into the list of hosts is now unlimited.
4667 47. The lsearch lookup could not handle data where the length of text line was
4668 more than 4095 characters. Such lines were truncated, leading to shortened
4669 data being returned. It should now handle lines of any length.
4671 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4672 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4675 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4676 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4677 no longer happens in comment lines. A list of replacements is now placed
4678 at the head of all of the source files, except those whose only change is
4679 to replace PERL_COMMAND in the very first #! line.
4681 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4682 messages on the queue, with a bottom-up merge sort, using code contributed
4683 by Michael Haardt. This should make operations like -bp somewhat faster on
4684 large queues. It won't affect queue runners, except when queue_run_in_order
4687 51. Installed eximstats 1.31 in the distribution.
4689 52. Added support for SRV lookups to the dnslookup router.
4691 53. If an ACL referred to $message_body or $message_body_end, the value was not
4692 reset for any messages that followed in the same SMTP session.
4694 54. The store-handling optimization for building very long strings was not
4695 differentiating between the different store pools. I don't think this
4696 actually made any difference in practice, but I've tidied it.
4698 55. While running the routers to verify a sender address, $sender_address
4699 was still set to the sender address. This is wrong, because when routing to
4700 send a bounce to the sender, it would be empty. Therefore, I have changed
4701 it so that, while verifying a sender address, $sender_address is set to <>.
4702 (There is no change to what happens when verifying a recipient address.)
4704 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4705 target A or AAAA records (if not already returned) without resetting the
4706 qualify_single or search_parents options of the DNS resolver. These are
4707 inappropriate in this case because the targets of MX and SRV records must
4708 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4709 target that, when qualified, matched something in the local domain. These
4710 two options are now turned off when doing these lookups.
4712 57. It seems that at least some releases of Reiserfs (which does not have the
4713 concept of a fixed number of inodes) returns zero and not -1 for the
4714 number of available inodes. This interacted badly with check_spool_inodes,
4715 which assumed that -1 was the "no such thing" setting. What I have done is
4716 to check that the total number of inodes is greater than zero before doing
4717 the test of how many are available.
4719 58. When a "warn" ACL statement has a log_message modifier, the message is
4720 remembered, and not repeated. This is to avoid a lot of repetition when a
4721 message has many recipients that cause the same warning to be written.
4722 Howewer, Exim was preserving the list of already written lines for an
4723 entire SMTP session, which doesn't seem right. The memory is now reset if a
4724 new message is started.
4726 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4727 debugging output unless log_rewrite was also set.
4729 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4730 of (int)(handle) when we know that handle contains (void *)(-1).
4732 61. The Exim daemon panic-logs an error return when it closes the incoming
4733 connection. However "connection reset by peer" seems to be common, and
4734 isn't really an error worthy of noting specially, so that particular error
4737 62. When Exim is trying to find all the local interfaces, it used to panic and
4738 die if the ioctl to get the interface flags failed. However, it seems that
4739 on at least one OS (Solaris 9) it is possible to have an interface that is
4740 included in the list of interfaces, but for which you get a failure error
4741 for this call. This happens when the interface is not "plumbed" into a
4742 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4743 failure of the "get flags" call assumes that the interface is down.
4745 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4746 makes life easier for people who are doing arithmetic on fields extracted
4747 from dates, where you often get leading zeros that should not be
4748 interpreted as octal.
4750 64. Added qualify_domain to the redirect router, to override the global
4753 65. If a pathologically long header line contained very many addresses (the
4754 report of this problem mentioned 10 000) and each of them was rewritten,
4755 Exim could use up a very large amount of memory. (It kept on making new
4756 copies of the header line as it rewrote, and never released the old ones.)
4757 At the expense of a bit more processing, the header rewriting function has
4758 been changed so that it no longer eats memory in this way.
4760 66. The generation of the Received: header has been moved from the time that a
4761 message starts to be received, to the time that it finishes. The timestamp
4762 in the Received: header should now be very close to that of the <= log
4763 line. There are two side-effects of this change:
4765 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4766 logged header lines no longer include the local Received: line, because
4767 it has not yet been created. The same applies to a copy of the message
4768 that is returned to a non-SMTP sender when a message is rejected.
4770 (b) When a filter file is tested using -bf, no additional Received: header
4771 is added to the test message. After some thought, I decided that this
4774 This change does not affect the value of $received_for. It is still set
4775 after address rewriting, but before local_scan() is called.
4777 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4779 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4780 gave an unhelpful panic error message, and a defer error. I have managed to
4781 change this behaviour so that it now rejects any supplied certificate,
4782 which seems right, as the list of acceptable certificates is empty.
4784 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4785 gave an unhelpful defer error. I have not managed to make this reject any
4786 supplied certificates, but the error message it gives is "no certificate
4787 supplied", which is not helpful.
4789 70. exigrep's output now also includes lines that are not associated with any
4790 message, but which match the given pattern. Implemented by a patch from
4791 Martin Sluka, which also tidied up the Perl a bit.
4793 71. Recipient callout verification, like sender verification, was using <> in
4794 the MAIL FROM command. This isn't really the right thing, since the actual
4795 sender may affect whether the remote host accepts the recipient or not. I
4796 have changed it to use the actual sender in the callout; this means that
4797 the cache record is now keyed on a recipient/sender pair, not just the
4798 recipient address. There doesn't seem to be a real danger of callout loops,
4799 since a callout by the remote host to check the sender would use <>.
4800 [SEE ABOVE: changed after hitting problems.]
4802 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4803 temporary errors. However, in the case of such a code being given after
4804 the end of a data transmission (i.e. after ".") Exim was failing to write
4805 a retry record for the message. (Yes, there was some broken host that was
4806 actually sending 8xx at this point.)
4808 73. An unknown lookup type in a host list could cause Exim to panic-die when
4809 the list was checked. (An example that provoked this was putting <; in the
4810 middle of a list instead of at the start.) If this happened during a DATA
4811 ACL check, a -D file could be left lying around. This kind of configuration
4812 error no longer causes Exim to die; instead it causes a defer errror. The
4813 incident is still logged to the main and panic logs.
4815 74. Buglet left over from Exim 3 conversion. The message "too many messages
4816 in one connection" was written to the rejectlog but not the mainlog, except
4817 when address rewriting (yes!) was being logged.
4819 75. Added write_rejectlog option.
4821 76. When a system filter was run not as root (that is, when system_filter_user
4822 was set), the values of the $n variables were not being returned to the
4823 main process; thus, they were not subsequently available in the $sn
4826 77. Added +return_path_on_delivery log selector.
4828 78. A connection timeout was being treated differently from recipients deferred
4829 when testing hosts_max_try with a message that was older than the host's
4830 retry timeout. (The host should not be counted, thus allowing all hosts to
4831 be tried at least once before bouncing.) This may have been the cause of an
4832 occasionally reported bug whereby a message would remain on the queue
4833 longer than the retry timeout, but would be bounced if a delivery was
4834 forced. I say "may" because I never totally pinned down the problem;
4835 setting up timeout/retry tests is difficult. See also the next item.
4837 79. The ultimate address timeout was not being applied to errors that involved
4838 a combination of host plus message (for example, a timeout on a MAIL
4839 command). When an address resolved to a number of possible hosts, and they
4840 were not all tried for each delivery (e.g. because of hosts_max_try), a
4841 message could remain on the queue longer than the retry timeout.
4843 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4846 81. Fixed an obscure SMTP outgoing bug which required at least the following
4847 conditions: (a) there was another message waiting for the same server;
4848 (b) the server returned 5xx to all RCPT commands in the first message so
4849 that the message was not completed; (c) the server dropped the connection
4850 or gave a negative response to the RSET that Exim sends to abort the
4851 transaction. The observed case was a dropped connection after DATA that had
4852 been sent in pipelining mode. That is, the server had advertised PIPELINING
4853 but was not implementing it correctly. The effect of the bug was incorrect
4854 behaviour, such as trying another host, and this could lead to a crash.
4860 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4861 and daemon.c were passed as pointers to ints; they should have been
4862 pointers to socklen_t variables (which are typically unsigned ints).
4864 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4867 3. Fixed a really odd bug that affected only the testing scheme; patching a
4868 certain fixed string in the binary changed the value of another string that
4869 happened to be identical to the end of the original first string.
4871 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4872 name", it returns that address as the IP address. On some operating
4873 systems (e.g. Solaris), it also passes back the IP address string as the
4874 "host name". However, on others (e.g. Linux), it passes back an empty
4875 string. Exim wasn't checking for this, and was changing the host name to an
4876 empty string, assuming it had been canonicized.
4878 5. Although rare, it is permitted to have more than one PTR record for a given
4879 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4880 all the names associated with an address, because they do in Solaris.
4881 However, it seems that they do not in Linux for data that comes from the
4882 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4883 I found this out when I moved to a new Linux workstation and tried to run
4884 the Exim test suite.
4886 To get round this problem I have changed the code so that it now does its
4887 own call to the DNS to look up PTR records when searching for a host name.
4888 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4889 addresses that are only in /etc/hosts are still found.
4891 This behaviour is, however, controlled by an option called host_lookup_
4892 order, which defaults to "bydns:byaddr". If people want to use the other
4893 order, or indeed, just use one or the other means of lookup, they can
4894 specify it in this variable.
4896 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4897 some operating systems, this comes back from gethostbyaddr() as an empty
4898 string, and this is what Exim used to test for. However, it seems that in
4899 other systems, "." is yielded. Exim now tests for this case too.
4901 7. The values of check_spool_space and check_log_space are now held internally
4902 as a number of kilobytes instead of an absolute number of bytes. If a
4903 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4904 kilobyte. This means that much larger values can be stored.
4906 8. Exim monitor: an attempt to get the action menu when not actually pointing
4907 at a message produces an empty menu entitled "No message selected". This
4908 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4909 no entries in it ("Shell widget menu has zero width and/or height"). So I
4910 have added a single, blank menu entry in this case.
4912 9. Added ${quote_local_part.
4914 10. MIME decoding is now applied to the contents of Subject: header lines when
4917 11. Now that a reference to $sender_host_address automatically causes a reverse
4918 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4919 host lookup before query-style lookups in lists that might use this
4920 variable. This has therefore been abolished, and the "net-" prefix is no
4921 longer necessary for query-style lookups.
4923 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4924 have been a typo for LFLAGS, so it has been changed.
4926 13. The install script calls Exim with "-C /dev/null" in order to find the
4927 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4928 to be output. Howeve, since Exim outputs its version number before the
4929 error, it didn't break the script. It just looked ugly. I fixed this by
4930 always allowing "-C /dev/null" if the caller is root.
4932 14. Ignore overlarge ACL variable number when reading spool file - insurance
4933 against a later release with more variables having written the file.
4935 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4936 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4937 this, as well as the form without the "IPv6" on the front.
4939 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4940 OS/Makefile-Darwin file.
4942 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4943 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4945 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4946 variable. However, some OS use ints for inodes. I've added cast to long int
4947 to get rid of the compiler warning.
4949 19. I had forgotten to lock out "/../" in configuration file names when
4950 ALT_CONFIG_PREFIX was set.
4952 20. Routers used for verification do not need to specify transports. However,
4953 if such a router generated a host list, and callout was configured, Exim
4954 crashed, because it could not find a port number from the (non-existent)
4955 transport. It now assumes port 25 in this circumstance.
4957 21. Added the -t option to exigrep.
4959 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4960 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4961 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4962 them is set, LOOKUP_LSEARCH is forced.
4964 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4966 24. Added sender and host information to the "rejected by local_scan()" log
4967 line; previously there was no indication of these.
4969 25. Added .include_if_exists.
4971 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4972 Linux. It turns out that not all file systems support this. Apparently some
4973 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4974 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4975 not supported on the file descriptor, is now ignored when Exim is trying to
4976 sync a directory. This applies only to Linux.
4978 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4980 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4981 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4984 29. Added support for maildirsize files from supplied patch (modified a bit).
4986 30. The use of :fail: followed by an empty string could lead Exim to respond to
4987 sender verification failures with (e.g.):
4989 550 Verification failed for <xxx>
4990 550 Sender verify failed
4992 where the first response line was missing the '-' that indicates it is not
4993 the final line of the response.
4995 31. The loop for finding the name of the user that called Exim had a hardwired
4996 limit of 10; it now uses the value of finduser_retries, which is used for
4997 all other user lookups.
4999 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5002 33. Exim was neglecting to zero errno before one call of strtol() when
5003 expanding a string and expecting an integer value. On some systems this
5004 resulted in spurious "integer overflow" errors. Also, it was casting the
5005 result into an int without checking.
5007 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5008 did not work. The code looks as if it has *never* worked, though it appears
5009 to have been documented since at least releast 1.62. I have made it work.
5011 35. The "timeout_DNS" error in retry rules, also documented since at least
5012 1.62, also never worked. As it isn't clear exactly what this means, and
5013 clearly it isn't a major issue, I have abolished the feature by treating it
5014 as "timeout", and writing a warning to the main and panic logs.
5016 36. The display of retry rules for -brt wasn't always showing the error code
5019 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5020 timeout_connect_A, timeout_connect_MX.
5022 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5023 to the empty sender.
5025 39. The daemon was not analysing the content of -oX till after it had closed
5026 stderr and disconnected from the controlling terminal. This meant that any
5027 syntax errors were only noted on the panic log, and the return code from
5028 the command was 0. By re-arranging the code a little, I've made the
5029 decoding happen first, so such errors now appear on stderr, and the return
5030 code is 1. However, the actual setting up of the sockets still happens in
5031 the disconnected process, so errors there are still only recorded on the
5034 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5035 connections (as happens on some IP stacks) was logged at start up time as
5036 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5037 it from "IPv6 and IPv4", which means that two separate sockets are being
5040 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5041 says whether AF_INET or AF_INET6 was passed as an argument.
5043 42. Exiwhat output was messed up when time zones were included in log
5046 43. Exiwhat now gives more information about the daemon's listening ports,
5047 and whether -tls-on-connect was used.
5049 44. The "port" option of the smtp transport is now expanded.
5051 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5052 silently ignored. Now an error message is written to the main and panic
5055 46. There's a new ACL modifier called "logwrite" which writes to a log file
5056 as soon as it is encountered.
5058 47. Added $local_user_uid and $local_user_gid at routing time.
5060 48. Exim crashed when trying to verify a sender address that was being
5063 49. Exim was recognizing only a space character after ".include". It now also
5064 recognizes a tab character.
5066 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5067 extracting the relevant information from the specification. The man page no
5068 longer contains scrambled data for the -d option, and I've added a section
5069 at the front about calling Exim under different names.
5071 51. Added "extra_headers" argument to the "mail" command in filter files.
5073 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5076 53. Installed eximstats 1.29.
5078 54. Added transport_filter_timeout as a generic transport option.
5080 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5081 Cc: header lines. This was required by RFC 822, but it not required by RFC
5084 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5085 incoming messages that did not have them. Now it does so only if the
5086 message originates locally, that is, if there is no associated remote host
5087 address. When Resent- header lines are present, this applies to the Resent-
5088 lines rather than the non-Resent- lines.
5090 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5091 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5093 58. Messages for configuration errors now include the name of the main
5094 configuration file - useful now that there may be more than one file in a
5095 list (.included file names were always shown).
5097 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5098 for those rare installations that do not start the daemon as root or run it
5099 setuid root. I've cut out the call to initgroups() if the daemon is not
5102 60. The Exim user and group can now be bound into the binary as text strings
5103 that are looked up at the start of Exim's processing.
5105 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5107 62. Added $mailstore_basename variable.
5109 63. Installed patch to sieve.c from Michael Haardt.
5111 64. When Exim failed to open the panic log after failing to open the main log,
5112 the original message it was trying to log was written to stderr and debug
5113 output, but if they were not available (the usual case in production), it
5114 was lost. Now it is written to syslog before the two lines that record the
5115 failures to open the logs.
5117 65. Users' Exim filters run in subprocesses under the user's uid. It is
5118 possible for a "deliver" command or an alias in a "personal" command to
5119 provoke an address rewrite. If logging of address rewriting is configured,
5120 this fails because the process is not running as root or exim. There may be
5121 a better way of dealing with this, but for the moment (because 4.30 needs
5122 to be released), I have disabled address rewrite logging when running a
5123 filter in a non-root, non-exim process.
5129 1. The buildconfig auxiliary program wasn't quoting the value set for
5130 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5131 not defined. This bug was masked in 4.22 by the effect that was fixed in
5134 2. Some messages that were rejected after a message id was allocated were
5135 shown as "incomplete" by exigrep. It no longer does this for messages that
5136 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5138 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5139 have allow_domain_literals set, the ID did not get logged in the <= line.
5140 Domain literals are now always recognized in Message-ID: header lines.
5142 4. The first argument for a ${extract expansion item is the key name or field
5143 number. Leading and trailing spaces in this item were not being ignored,
5144 causing some misleading effects.
5146 5. When deliver_drop_privilege was set, single queue runner processes started
5147 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5148 same command in the process it spins off) were not dropping privilege.
5150 6. When the daemon running as "exim" started a queue runner, it always
5151 re-executed Exim in the spun-off process. This is a waste of effort when
5152 deliver_drop_privilege is set. The new process now just calls the
5153 queue-runner function directly.
5159 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5162 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5163 ignored. Though the use of -oP was forcing the writing of a pid file, it
5164 was always written to the default place.
5166 3. If the message "no IP address found for host xxxx" is generated during
5167 incoming verification, it is now followed by identification of the incoming
5168 connection (so you can more easily find what provoked it).
5170 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5172 5. Added some features to "harden" Exim a bit more against certain attacks:
5174 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5175 be put in Local/Makefile. This is like the never_users runtime option,
5176 but it cannot be overridden. The default setting is "root".
5178 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5179 prefix string with which any file named in a -C command line option
5182 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5183 is retained for -C and -D only if the caller of Exim is root. Without
5184 it, the exim user may also use -C and -D and retain privilege.
5186 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5187 command line option is disabled.
5189 6. Macro names set by the -D option must start with an upper case letter, just
5190 like macro names defined in the configuration file.
5192 7. Added "dereference=" facility to LDAP.
5194 8. Two instances of the typo "uknown" in the source files are fixed.
5196 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5197 the Configure-Makefile script screwed up while processing it.
5199 10. Incorporated PCRE 4.4.
5201 11. The SMTP synchronization check was not operating right at the start of an
5202 SMTP session. For example, it could not catch a HELO sent before the client
5203 waited for the greeting. There is now a check for outstanding input at the
5204 point when the greeting is written. Because of the duplex, asynchronous
5205 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5206 way, but not yet received, when the check is performed.
5208 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5209 on TCP/IP sockets, because this apparently causes some broken clients to
5212 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5213 unchanged) from the Cygwin maintainer.
5215 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5216 was supported instead of testing for mbx. Effectively a typo.
5218 15. The spa authenticator server code was not checking that the input it
5219 received was valid base64.
5221 16. The debug output line for the "set" modifier in ACLs was not showing the
5222 name of the variable that was being set.
5224 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5226 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5227 lookup on its own. Something else was needed to trigger the lookup. For
5228 example, a match in host_lookup or the need for a host name in a host list.
5229 Now, if $sender_host_name is referenced and the host name has not yet been
5230 looked up, a lookup is performed. If the lookup fails, the variable remains
5231 empty, and $host_lookup_failed is set to "1".
5233 19. Added "eqi" as a case-independent comparison operator.
5235 20. The saslauthd authentication condition could segfault if neither service
5236 nor realm was specified.
5238 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5239 error message that was logged was misleading, and incoming SMTP
5240 connections were dropped. The message is now more accurate, and temporary
5241 errors are given to SMTP connections.
5243 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5244 (except RSET) with a 421 error, until QUIT is received. However, it was
5245 failing to send a response to QUIT.
5247 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5248 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5249 ACL is now run after the helo_try_verify_hosts code.
5251 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5252 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5253 case-independent, so other case variants are also recognized). Apparently
5254 some systems use these upper case variants.
5256 25. If more than two messages were waiting for the same host, and a transport
5257 filter was specified for the transport, Exim sent two messages over the
5258 same TCP/IP connection, and then failed with "socket operation on non-
5259 socket" when it tried to send the third.
5261 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5263 27. The extern definition of crypt16() in expand.c was not being excluded when
5264 the OS had its own crypt16() function.
5266 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5267 as a preferred synonym for return_size_limit, both as an option and as an
5270 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5272 30. Changed the default configuration ACL to relax the local part checking rule
5273 for addresses that are not in any local domains. For these addresses,
5274 slashes and pipe symbols are allowed within local parts, but the sequence
5275 /../ is explicitly forbidden.
5277 31. SPA server authentication was not clearing the challenge buffer before
5280 32. log_message in a "warn" ACL statement was writing to the reject log as
5281 well as to the main log, which contradicts the documentation and doesn't
5282 seem right (because no rejection is happening). So I have stopped it.
5284 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5285 However, I am unable to do any testing of this.
5287 34. Fixed an infelicity in the appendfile transport. When checking directories
5288 for a mailbox, to see if any needed to be created, it was accidentally
5289 using path names with one or more superfluous leading slashes; tracing
5290 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5292 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5293 contents are added to the log line that is written for every discarded
5294 recipient. (Previously a log_message setting was ignored.)
5296 36. The ${quote: operator now quotes the string if it is empty.
5298 37. The install script runs exim in order to find its version number. If for
5299 some reason other than non-existence or emptiness, which it checks, it
5300 could not run './exim', it was installing it with an empty version number,
5301 i.e. as "exim-". This error state is now caught, and the installation is
5304 38. An argument was missing from the function that creates an error message
5305 when Exim fails to connect to the socket for saslauthd authentication.
5306 This could cause Exim to crash, or give a corrupted message.
5308 39. Added isip, isip4, and isip6 to ${if conditions.
5310 40. The ACL variables $acl_xx are now saved with the message, and can be
5311 accessed later in routers, transports, and filters.
5313 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5314 strings in the file are not string-expanded.
5316 42. If a MAIL command specified a SIZE value that was too large to fit into an
5317 int variable, the check against message_size_limit failed. Such values are
5318 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5319 day this will have to be increased, but I don't think I want to be around
5320 when emails are that large.
5327 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5328 iconv() is not standard in FreeBSD.
5330 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5331 IPv6 enabled. The observed symptom was a segmentation fault on return from
5332 the function os_common_find_running_interfaces() in src/os.c.
5334 3. In the check_special_case() function in daemon.c I had used "errno" as an
5335 argument name, which causes warnings on some systems. This was basically a
5336 typo, since it was named "eno" in the comments!
5338 4. The code that waits for the clock to tick (at a resolution of some fraction
5339 of a second) so as to ensure message-id uniqueness was always waiting for
5340 at least one whole tick, when it could have waited for less. [This is
5341 almost certainly not relevant at current processor speeds, where it is
5342 unlikely to ever wait at all. But we try to future-proof.]
5344 5. The function that sleeps for a time interval that includes fractions of a
5345 second contained a race. It did not block SIGALRM between setting the
5346 timer, and suspending (a couple of lines later). If the interval was short
5347 and the sigsuspend() was delayed until after it had expired, the suspension
5348 never ended. On busy systems this could lead to processes getting stuck for
5351 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5352 process, before it forks any delivery processes. The open lookup caching
5353 mechanism meant that the open file or database connection was passed into
5354 the delivery process. The problem was that delivery processes always tidy
5355 up cached lookup data. This could cause a problem for the next delivery
5356 process started by the queue runner, because the external queue runner
5357 process does not know about the closure. So the next delivery process
5358 still has data in the lookup cache. In the case of a file lookup, there was
5359 no problem because closing a file descriptor in a subprocess doesn't affect
5360 the parent. However, if the lookup was caching a connection to a database,
5361 the connection was closed, and the second delivery process was likely to
5362 see errors such as "PGSQL: query failed: server closed the connection
5363 unexpectedly". The problem has been fixed by closing all cached lookups
5364 in a queue runner before running a delivery process.
5366 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5367 seem to have the "const" qualifier which it has on other OS. I've
5370 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5371 *of the same type* (client or server) with the same public name that an
5372 error should be diagnosed.
5374 9. When Exim looked up a host name for an IP address, but failed to find the
5375 original IP address when looking up the host name (a safety check), it
5376 output the message "<ip address> does not match any IP for NULL", which was
5377 confusing, to say the least. The bug was that the host name should have
5378 appeared instead of "NULL".
5380 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5381 user that is built into the binary, and the -C or -D options is used, root
5382 privilege is dropped before the configuration file is read. In addition,
5383 logging is switched to stderr instead of the normal log files. If the
5384 configuration then re-defines the Exim user, the unprivileged environment
5385 is probably not what is expected, so Exim logs a panic warning message (but
5388 However, if deliver_drop_privilege is set, the unprivileged state may well
5389 be exactly what is intended, so the warning has been cut out in that case,
5390 and Exim is allowed to try to write to its normal log files.
5396 1. smtp_return_error_details was not giving details for temporary sender
5397 or receiver verification errors.
5399 2. Diagnose a configuration error if two authenticators have the same public
5402 3. Exim used not to create the message log file for a message until the first
5403 delivery attempt. This could be confusing when incoming messages were held
5404 for policy or load reasons. The message log file is now created at the time
5405 the message is received, and an initial "Received" line is written to it.
5407 4. The automatically generated man page for command line options had a minor
5408 bug that caused no ill effects; however, a more serious problem was that
5409 the procedure for building the man page automatically didn't always
5410 operate. Consequently, release 4.20 contains an out-of-date version. This
5411 shouldn't happen again.
5413 5. When building Exim with embedded Perl support, the script that builds the
5414 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5415 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5417 6. The freeze_tell option was not being used for messages that were frozen on
5418 arrival, either by an ACL or by local_scan().
5420 7. Added the smtp_incomplete_transaction log selector.
5422 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5423 was accepting AUTH without a new EHLO.
5425 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5426 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5429 10. Logging of TCP/IP connections (when configured) now happens in the main
5430 daemon process instead of the child process, so that the TCP/IP connection
5431 count is more accurate (but it can never be perfect).
5433 11. The use of "drop" in a nested ACL was not being handled correctly in the
5434 outer ACL. Now, if condition failure induced by the nested "drop" causes
5435 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5436 or "require"), the connection is dropped.
5438 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5439 that yield "discard" can now be used with an "accept" or a "discard" verb,
5440 but an error is generated for any others (because I can't see a useful way
5441 to define what should happen).
5443 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5444 are now processed in the same way as lines in the Exim configuration file.
5445 In particular, continuation lines are supported.
5447 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5449 15. Added -ti meaning -t -i.
5451 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5452 domains, and warn by logging if others are found.
5454 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5455 returned from GIFCONF when Exim is trying to find the list of interfaces on
5456 a host. The code in os.c has been modified to copy each ifreq to an aligned
5457 structure in all cases.
5459 Also, in some cases, the returned ifreq's were being copied to a 'struct
5460 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5461 means the last couple of bytes of an IPv6 address could be chopped if the
5462 ifreq contained only a normal sockaddr (14 bytes storage).
5464 18. Named domain lists were not supported in the hosts_treat_as_local option.
5465 An entry such as +xxxx was not recognized, and was treated as a literal
5468 19. Ensure that header lines added by a DATA ACL are included in the reject log
5469 if the ACL subsequently rejects the message.
5471 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5472 MD5 (which is deprecated).
5474 21. When testing a filter file using -bf, Exim was writing a message when it
5475 took the sender from a "From " line in the message, but it was not doing so
5476 when it took $return_path from a Return-Path: header line. It now does.
5478 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5479 with a valid header line field name (a series of printing characters
5480 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5482 23. Changed "disc" in the source to "disk" to conform to the documentation and
5483 the book and for uniformity.
5485 24. Ignore Sendmail's -Ooption=value command line item.
5487 25. When execve() failed while trying to run a command in a pipe transport,
5488 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5489 could be confused with a return value of 69 from the command itself. This
5490 has been changed to 127, the value the shell returns if it is asked to run
5491 a non-existent command. The wording for the related log line suggests a
5492 non-existent command as the problem.
5494 26. If received_header_text expands to an empty string, do not add a Received:
5495 header line to the message. (Well, it adds a token one on the spool, but
5496 marks it "old" so that it doesn't get used or transmitted.)
5498 27. Installed eximstats 1.28 (addition of -nt option).
5500 28. There was no check for failure on the call to getsockname() in the daemon
5501 code. This can fail if there is a shortage of resources on the system, with
5502 ENOMEM, for example. A temporary error is now given on failure.
5504 29. Contrary to the C standard, it seems that in some environments, the
5505 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5506 program. Exim now does this explicitly; it affects the formatting of
5507 timestamps using strftime().
5509 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5510 complaints. I've now initialized all the variables, to avoid this.
5512 32. Header lines added by a system filter were not being "seen" during
5513 transport-time rewrites.
5515 33. The info_callback() function passed to OpenSSL is set up with type void
5516 (*)(SSL *, int, int), as described somewhere. However, when calling the
5517 function (actually a macro) that sets it up, the type void(*)() is
5518 expected. I've put in a cast to prevent warnings from picky compilers.
5520 34. If a DNS black list lookup found a CNAME record, but there were no A
5521 records associated with the domain it pointed at, Exim crashed.
5523 35. If a DNS black list lookup returned more than one A record, Exim ignored
5524 all but the first. It now scans all returned addresses if a particular IP
5525 value is being sought. In this situation, the contents of the
5526 $dnslist_value variable are a list of all the addresses, separated by a
5529 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5530 to accept a host name and all its aliases if the forward lookup for any of
5531 them yielded the IP address of the incoming connection. Now it accepts only
5532 those names whose forward lookup yields the correct IP address. Any other
5533 names are discarded. This closes a loophole whereby a rogue DNS
5534 administrator could create reverse DNS records to break through a
5535 wildcarded host restriction in an ACL.
5537 37. If a user filter or a system filter that ran in a subprocess used any of
5538 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5539 the wrong values were passed to the pipe command ($thisaddress had the
5540 value of $0, $0 had the value of $1, etc). This bug was introduced by
5541 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5543 38. Improved the line breaking for long SMTP error messages from ACLs.
5544 Previously, if there was no break point between 40 and 75 characters, Exim
5545 left the rest of the message alone. Two changes have been made: (a) I've
5546 reduced the minimum length to 35 characters; (b) if it can't find a break
5547 point between 35 and 75 characters, it looks ahead and uses the first one
5548 that it finds. This may give the occasional overlong line, but at least the
5549 remaining text gets split now.
5551 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5552 file descriptors might be low, and that setting 1000 would always raise it.
5553 It turns out that in some environments, the limit is already over 1000 and
5554 that lowering it causes trouble. So now Exim takes care not to decrease it.
5556 40. When delivering a message, the value of $return_path is set to $sender_
5557 address at the start of routing (routers may change the value). By an
5558 oversight, this default was not being set up when an address was tested by
5559 -bt or -bv, which affected the outcome if any router or filter referred to
5562 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5563 log only when "message" or "log_message" are set. However, if one of the
5564 conditions was an address verification, or a call to a nested ACL, the
5565 messages generated by the underlying test were being passed through. This
5566 no longer happens. The underlying message is available in $acl_verify_
5567 message for both "message" and "log_message" expansions, so it can be
5568 passed through if needed.
5570 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5571 new expansion $bh_ to give the encoded byte string without charset
5572 translation. Translation happens only if iconv() is available; HAVE_ICONV
5573 indicates this at build time. HEADERS_CHARSET gives the charset to
5574 translate to; headers_charset can change it in the configuration, and
5575 "headers charset" can change it in an individual filter file.
5577 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5578 that creates RFC 2047 encoded "words" labels them as that charset instead
5579 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5580 expansion operator; (ii) when Exim creates a From: line for a local
5581 message; (iii) when a header line is rewritten to include a "phrase" part.
5583 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5584 buggy, causing it to skip the first lines of messages whose message ID
5585 ended in 'D'. This would not have bitten before Exim release 4.14, because
5586 message IDs were unlikely to end in 'D' before then. The effect was to have
5587 incorrect size information for certain domains.
5589 45. #include "config.h" was missing at the start of the crypt16.c module. This
5590 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5593 46. If there was a timeout during a "random" callout check, Exim treated it as
5594 a failure of the random address, and carried on sending RSET and the real
5595 address. If the delay was just some slowness somewhere, the response to the
5596 original RCPT would be taken as a response to RSET and so on, causing
5597 mayhem of various kinds.
5599 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5600 when I implemented it. It didn't allow for the fact that some option values
5601 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5602 the right test for positive values.
5604 48. Domain names in DNS records are case-independent. Exim always looks them up
5605 in lower case. Some resolvers return domain names in exactly the case they
5606 appear in the zone file, that is, they may contain uppercase letters. Not
5607 all resolvers do this - some return always lower case. Exim was treating a
5608 change of case by a resolver as a change of domain, similar to a widening
5609 of a domain abbreviation. This triggered its re-routing code and so it was
5610 trying to route what was effectively the same domain again. This normally
5611 caused routing to fail (because the router wouldn't handle the domain
5612 twice). Now Exim checks for this case specially, and just changes the
5613 casing of the domain that it ultimately uses when it transmits the message
5616 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5619 50. If a filter generated a file delivery with a non-absolute name (possible if
5620 no home directory exists for the router), the forbid_file option was not
5623 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5624 the existing equality matching.
5626 52. Exim was using ints instead of ino_t variables in some places where it was
5627 dealing with inode numbers.
5629 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5630 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5631 called TMPDIR, and if it finds it is different, it changes its value.
5633 54. The smtp_printf() function is now made available to local_scan() so
5634 additional output lines can be written before returning. There is also an
5635 smtp_fflush() function to enable the detection of a dropped connection.
5636 The variables smtp_input and smtp_batched_input are exported to
5639 55. Changed the default runtime configuration: the message "Unknown user"
5640 has been removed from the ACL, and instead placed on the localuser router,
5641 using the cannot_route_message feature. This means that any verification
5642 failures that generate their own messages won't get overridden. Similarly,
5643 the "Unrouteable address" message that was in the ACL for unverifiable
5644 relay addresses has also been removed.
5646 56. Added hosts_avoid_esmtp to the smtp transport.
5648 57. The exicyclog script was not checking for the esoteric option
5649 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5650 will work only if exicyclog is run under the appropriate euid.
5652 58. Following a discussion on the list, the rules by which Exim recognises line
5653 endings on incoming messages have been changed. The -dropcr and drop_cr
5654 options are now no-ops, retained only for backwards compatibility. The
5655 following line terminators are recognized: LF CRLF CR. However, special
5656 processing applies to CR:
5658 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5659 nor a local message in the state where . is a terminator.
5661 (ii) If a bare CR is encountered in a header line, an extra space is added
5662 after the line terminator so as not to end the header. The reasoning
5663 behind this is that bare CRs in header lines are most likely either
5664 to be mistakes, or people trying to play silly games.
5666 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5667 was being incorrectly given as 18 bytes larger than it should have been.
5668 This is a VOB (very old bug).
5670 60. This may never have affected anything current, but just in case it has:
5671 When the local host is found other than at the start of a list of hosts,
5672 the local host, those with the same MX, and any that follow, are discarded.
5673 When the list in question was part of a longer list of hosts, the following
5674 hosts (not currently being processed) were also being discarded. This no
5675 longer happens. I'm not sure if this situation could ever has previously
5678 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5681 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5682 header. This is something that is recommended in a new Internet Draft, and
5683 is something that is documented as being done by Sendmail. There are two
5684 possible values. For messages generated by the autoreply transport, Exim
5687 Auto-Submitted: auto-replied
5689 whereas for all other generated messages (e.g. bounces) it adds
5691 Auto-Submitted: auto-generated
5693 63. The "personal" condition in filters now includes a test for the
5694 Auto-Submitted: header. If it contains the string "auto-" the message it
5695 not considered personal.
5697 64. Added rcpt_include_affixes as a generic transport option.
5699 65. Added queue_only_override (default true).
5701 66. Added the syslog_duplication option.
5703 67. If what should have been the first header line of a message consisted of
5704 a space followed by a colon, Exim was mis-interpreting it as a header line.
5705 It isn't of course - it is syntactically invalid and should therefore be
5706 treated as the start of the message body. The misbehaviour could have
5707 caused a number of strange effects, including loss of data in subsequent
5708 header lines, and spool format errors.
5710 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5711 client host had authenticated. This control can now be exercised by an ACL
5712 for more flexibility.
5714 69. By default, callouts do not happen when testing with -bh. There is now a
5715 variant, -bhc, which does actually run the callout code, including
5716 consulting and updating the callout cache.
5718 70. Added support for saslauthd authentication, courtesy of Alexander
5721 71. If statvfs() failed on the spool or log directories while checking their
5722 size for availability, Exim confusingly gave the error "space shortage".
5723 Furthermore, in debugging mode it crashed with a floating point exception.
5724 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5725 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5726 serious problem, Exim now writes to the main and panic logs when this
5727 happens, with details of the failure. It then refuses to accept the
5728 incoming message, giving the message "spool directory problem" or "log
5729 directory problem" with a 421 code for SMTP messages.
5731 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5732 0, 1, and 2 exist, because some OS complain for execs without them (see
5733 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5734 descriptors. However, the code omitted to check that the open succeeded,
5735 causing mysterious errors if for some reason the permissions on /dev/null
5736 got screwed. Now Exim writes a message to the main and panic logs, and
5737 bombs out if it can't open /dev/null.
5739 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5740 interact so that it is all more flexible. It is supposed to remain
5741 backwards compatible. Also added extra_local_interfaces.
5743 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5744 to bomb out with an assertion failure - to the client this appears as a
5745 connection drop. This problem occurs in the part of the code that was taken
5746 from the Samba project. Fortunately, the assertion is in a very simple
5747 function, so I have fixed this by reproducing the function inline in the
5748 one place where it is called, and arranging for authentication to fail
5749 instead of killing the process with assert().
5751 75. The SPA client code was not working when the server requested OEM rather
5752 than Unicode encoding.
5754 76. Added code to make require_files with a specific uid setting more usable in
5755 the case where statting the file as root fails - usually a non-root-mounted
5756 NFS file system. When this happens and the failure is EACCES, Exim now
5757 forks a subprocess and does the per-uid checking as the relevant uid.
5759 77. Added process_log_path.
5761 78. If log_file_path was not explicitly set, a setting of check_log_space or
5762 check_log_inodes was ignored.
5764 79. If a space check for the spool or log partitions fails, the incident is now
5765 logged. Of course, in the latter case the data may get lost...
5767 80. Added the %p formatting code to string_format() so that it can be used to
5768 print addresses in debug_print(). Adjusted all the address printing in the
5769 debugging in store.c to use %p rather than %d.
5771 81. There was a concern that a line of code in smtp_in.c could overflow a
5772 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5773 initially expressed, the concern was not well-founded, because trailing
5774 spaces are removed early. However, if the trailing spaces were followed by
5775 a NULL, they did not get removed, so the overflow was possible. Two fixes
5778 (a) I re-wrote the offending code in a cleaner fashion.
5779 (b) If an incoming SMTP command contains a NULL character, it is rejected
5782 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5783 runs initgroups(), so that if the Exim user is in any additional groups,
5784 they will be used during message reception.
5790 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob