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 change adds a proper retry rule check during routing so that the
117 final cutoff time is checked against the message's age. We only do
118 this check if there is an address retry record and there is not a
119 domain retry record; this implies that previous attempts to handle
120 the address had the retry_use_local_parts option turned on. We use
121 this as an approximation for the destination being like a local
122 delivery, as in LMTP.
124 I suspect this new check makes the old local delivery cutoff check
125 redundant, but I have not verified this so I left the code in place.
127 TF/02 Correct gecos expansion when From: is a prefix of the username.
129 Test 0254 submits a message to Exim with the header
133 When I ran the test suite under the user fanf2, Exim expanded
134 the header to contain my full name, whereas it should have added
135 a Resent-Sender: header. It erroneously treats any prefix of the
136 username as equal to the username.
138 This change corrects that bug.
140 GF/01 DCC debug and logging tidyup
141 Error conditions log to paniclog rather than rejectlog.
142 Debug lines prefixed by "DCC: " to remove any ambiguity.
144 TF/03 Avoid unnecessary rebuilds of lookup-related code.
146 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
147 Bug spotted by Jeremy Harris; was flawed since initial commit.
148 Would have resulted in OCSP responses post-SNI triggering an Exim
149 NULL dereference and crash.
155 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
157 This, or similar/improved, will also be change PP/11 of 4.82.
163 PP/01 Handle short writes when writing local log-files.
164 In practice, only affects FreeBSD (8 onwards).
165 Bugzilla 1053, with thanks to Dmitry Isaikin.
167 NM/01 Bugzilla 949 - Documentation tweak
169 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
172 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
174 PP/02 Implemented gsasl authenticator.
176 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
178 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
179 `pkg-config foo` for cflags/libs.
181 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
182 with rest of GSASL and with heimdal_gssapi.
184 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
185 `pkg-config foo` for cflags/libs for the TLS implementation.
187 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
188 properties get this fed in as external SSF. A number of robustness
189 and debugging improvements to the cyrus_sasl authenticator.
191 PP/08 cyrus_sasl server now expands the server_realm option.
193 PP/09 Bugzilla 1214 - Log authentication information in reject log.
194 Patch by Jeremy Harris.
196 PP/10 Added dbmjz lookup type.
198 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
200 PP/12 MAIL args handles TAB as well as SP, for better interop with
201 non-compliant senders.
202 Analysis and variant patch by Todd Lyons.
204 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
205 Bug report from Lars Müller <lars@samba.org> (via SUSE),
206 Patch from Dirk Mueller <dmueller@suse.com>
208 PP/13 tls_peerdn now print-escaped for spool files.
209 Observed some $tls_peerdn in wild which contained \n, which resulted
210 in spool file corruption.
212 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
213 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
214 or write after TLS renegotiation, which otherwise led to messages
217 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
218 as a tracking header (ie: a signed header comes before the signature).
219 Patch from Wolfgang Breyha.
221 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
222 comma-sep list; embedded commas doubled.
224 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
226 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
228 Report and patch from Dmitry Banschikov.
230 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
231 Removed SSL_clear() after SSL_new() which led to protocol negotiation
232 failures. We appear to now support TLS1.1+ with Exim.
234 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
235 lets Exim select keys and certificates based upon TLS SNI from client.
236 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
237 before an outbound SMTP session. New log_selector, +tls_sni.
239 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
240 NULL dereference. Report and patch from Alun Jones.
242 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
243 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
244 Not seeing resolver debug output on NetBSD, but suspect this is a
245 resolver implementation change.
247 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
248 Left warnings. Added "eximon gdb" invocation mode.
250 PP/21 Defaulting "accept_8bitmime" to true, not false.
252 PP/22 Added -bw for inetd wait mode support.
254 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
255 locate the relevant includes and libraries. Made this the default.
257 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
258 Bugzilla 1246, report and most of solution from Tomasz Kusy.
260 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
261 This may cause build issues on older platforms.
263 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
264 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
265 gnutls_require_mac & gnutls_require_protocols (no longer supported).
266 Added SNI support via GnuTLS too.
267 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
269 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
271 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
272 Applied second patch from Janne, implementing suggestion to default
273 multiple-strings-in-record handling to match SPF spec.
275 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
277 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
278 read-only, out of scope).
279 Patch from Wolfgang Breyha, report from Stuart Northfield.
281 PP/29 Fix three issues highlighted by clang analyser static analysis.
282 Only crash-plausible issue would require the Cambridge-specific
283 iplookup router and a misconfiguration.
284 Report from Marcin Mirosław.
286 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
288 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
289 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
290 As part of this, removing so much warning spew let me fix some minor
291 real issues in debug logging.
293 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
294 assignment on my part. Fixed.
296 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
297 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
298 Janne Snabb (who went above and beyond: thank you).
300 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
301 string otherwise requires a connection and a bunch more work and it's
302 relatively easy to get wrong. Should also expose TLS library linkage
305 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
306 64-bit ${eval} (JH/03).
308 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
309 GNU libc to support some of the 64-bit stuff, should not lead to
310 conflicts. Defined before os.h is pulled in, so if a given platform
311 needs to override this, it can.
313 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
314 protection layer was required, which is not implemented.
315 Bugzilla 1254, patch from Wolfgang Breyha.
317 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
318 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
319 tls_dhparam take prime identifiers. Also unbreak combination of
320 OpenSSL+DH_params+TLSSNI.
322 PP/39 Disable SSLv2 by default in OpenSSL support.
328 PP/01 Solaris build fix for Oracle's LDAP libraries.
329 Bugzilla 1109, patch from Stephen Usher.
331 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
333 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
336 TF/02 Fix a couple more cases where we did not log the error message
337 when unlink() failed. See also change 4.74-TF/03.
339 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
340 lock up or crash if it happened to be inside a call to libc when it
341 got a SIGUSR1 from exiwhat.
343 The SIGUSR1 handler appends the current process status to the process
344 log which is later printed by exiwhat. It used to use the general
345 purpose logging code to do this, but several functions it calls are
346 not safe for signals.
348 The new output code in the SIGUSR1 handler is specific to the process
349 log, and simple enough that it's easy to inspect for signal safety.
350 Removing some special cases also simplifies the general logging code.
351 Removing the spurious timestamps from the process log simplifies
354 TF/04 Improved ratelimit ACL condition.
356 The /noupdate option has been deprecated in favour of /readonly which
357 has clearer semantics. The /leaky, /strict, and /readonly update modes
358 are mutually exclusive. The update mode is no longer included in the
359 database key; it just determines when the database is updated. (This
360 means that when you upgrde Exim will forget old rate measurements.)
362 Exim now checks that the per_* options are used with an update mode that
363 makes sense for the current ACL. For example, when Exim is processing a
364 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
365 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
366 must specify per_mail/readonly. If you omit the update mode it defaults to
367 /leaky where that makes sense (as before) or /readonly where required.
369 The /noupdate option is now undocumented but still supported for
370 backwards compatibility. It is equivalent to /readonly except that in
371 ACLs where /readonly is required you may specify /leaky/noupdate or
372 /strict/noupdate which are treated the same as /readonly.
374 A useful new feature is the /count= option. This is a generalization
375 of the per_byte option, so that you can measure the throughput of other
376 aggregate values. For example, the per_byte option is now equivalent
377 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
379 The per_rcpt option has been generalized using the /count= mechanism
380 (though it's more complicated than the per_byte equivalence). When it is
381 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
382 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
383 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
384 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
385 Note that using per_rcpt with a non-readonly update mode in more than
386 one ACL will cause the recipients to be double-counted. (The per_mail
387 and per_byte options don't have this problem.)
389 The handling of very low rates has changed slightly. If the computed rate
390 is less than the event's count (usually one) then this event is the first
391 after a long gap. In this case the rate is set to the same as this event's
392 count, so that the first message of a spam run is counted properly.
394 The major new feature is a mechanism for counting the rate of unique
395 events. The new per_addr option counts the number of different
396 recipients that someone has sent messages to in the last time period. It
397 behaves like per_rcpt if all the recipient addresses are different, but
398 duplicate recipient addresses do not increase the measured rate. Like
399 the /count= option this is a general mechanism, so the per_addr option
400 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
401 example, measure the rate that a client uses different sender addresses
402 with the options per_mail/unique=$sender_address. There are further
403 details in the main documentation.
405 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
407 TF/06 Removed a few PCRE remnants.
409 TF/07 Automatically extract Exim's version number from tags in the git
410 repository when doing development or release builds.
412 PP/02 Raise smtp_cmd_buffer_size to 16kB.
413 Bugzilla 879. Patch from Paul Fisher.
415 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
416 Heavily based on revision 40f9a89a from Simon Arlott's tree.
419 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
421 PP/05 Variable $av_failed, true if the AV scanner deferred.
422 Bugzilla 1078. Patch from John Horne.
424 PP/06 Stop make process more reliably on build failure.
425 Bugzilla 1087. Patch from Heiko Schlittermann.
427 PP/07 Make maildir_use_size_file an _expandable_ boolean.
428 Bugzilla 1089. Patch from Heiko Schlittermann.
430 PP/08 Handle ${run} returning more data than OS pipe buffer size.
431 Bugzilla 1131. Patch from Holger Weiß.
433 PP/09 Handle IPv6 addresses with SPF.
434 Bugzilla 860. Patch from Wolfgang Breyha.
436 PP/10 GnuTLS: support TLS 1.2 & 1.1.
438 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
441 PP/11 match_* no longer expand right-hand-side by default.
442 New compile-time build option, EXPAND_LISTMATCH_RHS.
443 New expansion conditions, "inlist", "inlisti".
445 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
447 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
449 PP/14 fix log_write() format string regression from TF/03.
450 Bugzilla 1152. Patch from Dmitry Isaikin.
456 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
458 PP/02 Harmonised TLS library version reporting; only show if debugging.
459 Layout now matches that introduced for other libraries in 4.74 PP/03.
461 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
463 PP/04 New "dns_use_edns0" global option.
465 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
468 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
469 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
471 TK/01 Updated PolarSSL code to 0.14.2.
472 Bugzilla 1097. Patch from Andreas Metzler.
474 PP/07 Catch divide-by-zero in ${eval:...}.
477 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
480 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
481 format-string attack -- SECURITY: remote arbitrary code execution.
483 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
484 time unintentionally subject to list matching rules, letting the header
485 cause arbitrary Exim lookups (of items which can occur in lists, *not*
486 arbitrary string expansion). This allowed for information disclosure.
488 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
489 INT_MIN/-1 -- value coerced to INT_MAX.
495 NM/01 Workround for PCRE version dependency in version reporting
498 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
499 This fixes portability to compilers other than gcc, notably
500 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
502 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
503 makefiles for portability to HP-UX and POSIX correctness.
505 PP/01 Permit LOOKUP_foo enabling on the make command-line.
506 Also via indented variable definition in the Makefile.
507 (Debugging by Oliver Heesakkers).
509 PP/02 Restore caching of spamd results with expanded spamd_address.
510 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
512 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
513 Improves build reliability. Fix from: Frank Elsner
515 NM/02 Fix wide character breakage in the rfc2047 coding
516 Fixes bug 1064. Patch from Andrey N. Oktyabrski
518 NM/03 Allow underscore in dnslist lookups
519 Fixes bug 1026. Patch from Graeme Fowler
521 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
522 Code patches from Adam Ciarcinski of NetBSD.
524 NM/04 Fixed exiqgrep to cope with mailq missing size issue
527 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
528 is logged, to avoid truncation. Patch from John Horne.
530 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
531 Patch from Jakob Hirsch.
533 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
534 SQL string expansion failure details.
535 Patch from Andrey Oktyabrski.
537 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
538 Patch from Simon Arlott.
540 PP/09 New lookups functionality failed to compile on old gcc which rejects
541 extern declarations in function scope.
542 Patch from Oliver Fleischmann
544 PP/10 Use sig_atomic_t for flags set from signal handlers.
545 Check getgroups() return and improve debugging.
546 Fixed developed for diagnosis in bug 927 (which turned out to be
549 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
550 Patch from Mark Zealey.
552 PP/12 Bugzilla 1056: Improved spamd server selection.
553 Patch from Mark Zealey.
555 PP/13 Bugzilla 1086: Deal with maildir quota file races.
556 Based on patch from Heiko Schlittermann.
558 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
559 Patch from Uwe Doering, sign-off by Michael Haardt.
561 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
562 variable declaration deep within a block. Bug and patch from
565 PP/15 lookups-Makefile IRIX compatibilty coercion.
567 PP/16 Make DISABLE_DKIM build knob functional.
569 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
570 Patch by Simon Arlott
572 TF/03 Fix valgrind.h portability to C89 compilers that do not support
573 variable argument macros. Our copy now differs from upstream.
579 TF/01 Failure to get a lock on a hints database can have serious
580 consequences so log it to the panic log.
582 TF/02 Log LMTP confirmation messages in the same way as SMTP,
583 controlled using the smtp_confirmation log selector.
585 TF/03 Include the error message when we fail to unlink a spool file.
587 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
588 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
589 for maintaining out-of-tree patches for some time.
591 PP/01 Bugzilla 139: Documentation and portability issues.
592 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
593 Handle per-OS dynamic-module compilation flags.
595 PP/02 Let /dev/null have normal permissions.
596 The 4.73 fixes were a little too stringent and complained about the
597 permissions on /dev/null. Exempt it from some checks.
598 Reported by Andreas M. Kirchwitz.
600 PP/03 Report version information for many libraries, including
601 Exim version information for dynamically loaded libraries. Created
602 version.h, now support a version extension string for distributors
603 who patch heavily. Dynamic module ABI change.
605 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
606 privilege escalation vulnerability whereby the Exim run-time user
607 can cause root to append content of the attacker's choosing to
610 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
613 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
614 If dropping privileges for untrusted macros, we disabled normal logging
615 on the basis that it would fail; for the Exim run-time user, this is not
616 the case, and it resulted in successful deliveries going unlogged.
617 Fixed. Reported by Andreas Metzler.
623 PP/01 Date: & Message-Id: revert to normally being appended to a message,
624 only prepend for the Resent-* case. Fixes regression introduced in
625 Exim 4.70 by NM/22 for Bugzilla 607.
627 PP/02 Include check_rfc2047_length in configure.default because we're seeing
628 increasing numbers of administrators be bitten by this.
630 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
632 PP/03 Bugzilla 994: added openssl_options main configuration option.
634 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
636 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
638 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
640 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
641 without a peer certificate, leading to a segfault because of an
642 assumption that peers always have certificates. Be a little more
643 paranoid. Problem reported by Martin Tscholak.
645 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
646 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
647 NB: ClamAV planning to remove STREAM in "middle of 2010".
648 CL also introduces -bmalware, various -d+acl logging additions and
649 more caution in buffer sizes.
651 PP/09 Implemented reverse_ip expansion operator.
653 PP/10 Bugzilla 937: provide a "debug" ACL control.
655 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
657 PP/12 Bugzilla 973: Implement --version.
659 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
661 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
663 PP/15 Bugzilla 816: support multiple condition rules on Routers.
665 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
666 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
667 ignore trailing whitespace.
669 JJ/02 prevent non-panic DKIM error from being sent to paniclog
671 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
674 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
675 Notification from Dr Andrew Aitchison.
677 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
678 ExtendedDetectionInfo response format.
679 Notification from John Horne.
681 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
684 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
685 XSL and documented dependency on system catalogs, with examples of how
688 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
691 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
692 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
693 configuration file which is writeable by the Exim user or group.
695 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
696 of configuration files to cover files specified with the -C option if
697 they are going to be used with root privileges, not just the default
700 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
701 option (effectively making it always true).
703 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
704 files to be used while preserving root privileges.
706 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
707 that rogue child processes cannot use them.
709 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
710 run-time user, instead of root.
712 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
713 Exim run-time user without dropping privileges.
715 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
716 result string, instead of calling string_vformat() twice with the same
719 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
720 for other users. Others should always drop root privileges if they use
721 -C on the command line, even for a whitelisted configure file.
723 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
725 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
731 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
732 $data_path, and $header_path variables; fixed documentation bugs and
735 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
736 exipick to access non-standard spools, including the "frozen" queue
739 NM/01 Bugzilla 965: Support mysql stored procedures.
740 Patch from Alain Williams
742 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
744 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
745 Patch from Andreas Metzler
747 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
748 Patch from Kirill Miazine
750 NM/05 Bugzilla 671: Added umask to procmail example.
752 JJ/03 installed exipick 20100323.0, fixing doc bug
754 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
755 directory. Notification and patch from Dan Rosenberg.
757 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
759 TK/02 Improve log output when DKIM signing operation fails.
761 MH/01 Treat the transport option dkim_domain as a colon separated
762 list, not as a single string, and sign the message with each element,
763 omitting multiple occurences of the same signer.
765 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
766 Bugzilla 985, 986. Patch by Simon Arlott
768 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
769 Patch by Simon Arlott
771 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
772 MBX locking. Notification from Dan Rosenberg.
778 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
780 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
782 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
784 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
786 NM/04 Bugzilla 915: Flag broken perl installation during build.
792 TK/01 Added patch by Johannes Berg that expands the main option
793 "spamd_address" if it starts with a dollar sign.
795 TK/02 Write list of recipients to X-Envelope-Sender header when building
796 the mbox-format spool file for content scanning (suggested by Jakob
799 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
800 (http://www.dcc-servers.net/) support via dccifd. Activated by
801 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
803 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
804 by Mark Daniel Reidel <mr@df.eu>.
806 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
807 When building exim an external PCRE library is now needed -
808 PCRE is a system library on the majority of modern systems.
809 See entry on PCRE_LIBS in EDITME file.
811 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
812 conversation. Added nologin parameter to request.
813 Patch contributed by Kirill Miazine.
815 TF/01 Do not log submission mode rewrites if they do not change the address.
817 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
819 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
820 log files in place. Contributed by Roberto Lima.
822 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
824 TF/03 Bugzilla 615: When checking the local_parts router precondition
825 after a local_part_suffix or local_part_prefix option, Exim now
826 does not use the address's named list lookup cache, since this
827 contains cached lookups for the whole local part.
829 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
830 Robert Millan. Documentation is in experimental-spec.txt.
832 TF/04 Bugzilla 668: Fix parallel build (make -j).
834 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
836 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
837 Patch provided by Jan Srzednicki.
839 TF/05 Leading white space used to be stripped from $spam_report which
840 wrecked the formatting. Now it is preserved.
842 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
843 that they are available at delivery time.
845 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
847 TF/08 TLS error reporting now respects the incoming_interface and
848 incoming_port log selectors.
850 TF/09 Produce a more useful error message if an SMTP transport's hosts
851 setting expands to an empty string.
853 NM/06 Bugzilla 744: EXPN did not work under TLS.
854 Patch provided by Phil Pennock.
856 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
857 Patch provided by Richard Godbee.
859 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
860 acl_smtp_notquit, added index entry.
862 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
863 Patch provided by Eugene Bujak.
865 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
866 accept(). Patch provided by Maxim Dounin.
868 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
869 Patch provided by Phil Pennock.
871 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
873 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
874 Patch provided by Brad "anomie" Jorsch.
876 NM/14 Bugzilla 622: Added timeout setting to transport filter.
877 Patch provided by Dean Brooks.
879 TK/05 Add native DKIM support (does not depend on external libraries).
881 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
882 Patch provided by Graeme Fowler.
884 NM/16 Bugzilla 851: Documentation example syntax fix.
886 NM/17 Changed NOTICE file to remove references to embedded PCRE.
888 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
891 NM/19 Bugzilla 745: TLS version reporting.
892 Patch provided by Phil Pennock.
894 NM/20 Bugzilla 167: bool: condition support.
895 Patch provided by Phil Pennock.
897 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
898 clients. Patch provided by Phil Pennock.
900 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
901 Patch provided by Brad "anomie" Jorsch.
903 NM/23 Bugzilla 687: Fix misparses in eximstats.
904 Patch provided by Heiko Schlittermann.
906 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
907 Patch provided by Heiko Schlittermann.
909 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
910 plus update to original patch.
912 NM/26 Bugzilla 799: Documentation correction for ratelimit.
914 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
915 Patch provided by David Brownlee.
917 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
919 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
921 NM/30 Bugzilla 888: TLS documentation bugfixes.
923 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
925 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
926 Unlike the original bugzilla I have changed all shell scripts in src tree.
928 NM/33 Bugzilla 898: Transport filter timeout fix.
929 Patch by Todd Rinaldo.
931 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
932 Patch by Serge Demonchaux.
934 NM/35 Bugzilla 39: Base64 decode bug fixes.
935 Patch by Jakob Hirsch.
937 NM/36 Bugzilla 909: Correct connect() call in dcc code.
939 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
941 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
943 NM/39 Bugzilla 911: Fixed MakeLinks build script.
949 TK/01 Add preliminary DKIM support. Currently requires a forked version of
950 ALT-N's libdkim that I have put here:
951 http://duncanthrax.net/exim-experimental/
953 Note to Michael Haardt: I had to rename some vars in sieve.c. They
954 were called 'true' and it seems that C99 defines that as a reserved
955 keyword to be used with 'bool' variable types. That means you could
956 not include C99-style headers which use bools without triggering
957 build errors in sieve.c.
959 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
960 as mailq or other aliases. Changed the --help handling significantly
961 to do whats expected. exim_usage() emits usage/help information.
963 SC/01 Added the -bylocaldomain option to eximstats.
965 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
967 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
969 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
975 PH/01 Another patch from the Sieve maintainer.
977 PH/02 When an IPv6 address is converted to a string for single-key lookup
978 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
979 dots are used instead of colons so that keys in lsearch files need not
980 contain colons. This was done some time before quoting was made available
981 in lsearch files. However, iplsearch files do require colons in IPv6 keys
982 (notated using the quote facility) so as to distinguish them from IPv4
983 keys. This meant that lookups for IP addresses in host lists did not work
984 for iplsearch lookups.
986 This has been fixed by arranging for IPv6 addresses to be expressed with
987 colons if the lookup type is iplsearch. This is not incompatible, because
988 previously such lookups could never work.
990 The situation is now rather anomolous, since one *can* have colons in
991 ordinary lsearch keys. However, making the change in all cases is
992 incompatible and would probably break a number of configurations.
994 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
997 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
998 conversion specification without a maximum field width, thereby enabling
999 a rogue spamd server to cause a buffer overflow. While nobody in their
1000 right mind would setup Exim to query an untrusted spamd server, an
1001 attacker that gains access to a server running spamd could potentially
1002 exploit this vulnerability to run arbitrary code as the Exim user.
1004 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1005 $primary_hostname instead of what libspf2 thinks the hosts name is.
1007 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1008 a directory entry by the name of the lookup key. Previously, if a
1009 symlink pointed to a non-existing file or a file in a directory that
1010 Exim lacked permissions to read, a lookup for a key matching that
1011 symlink would fail. Now it is enough that a matching directory entry
1012 exists, symlink or not. (Bugzilla 503.)
1014 PH/03 The body_linecount and body_zerocount variables are now exported in the
1017 PH/04 Added the $dnslist_matched variable.
1019 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1020 This means they are set thereafter only if the connection becomes
1023 PH/06 Added the client_condition to authenticators so that some can be skipped
1024 by clients under certain conditions.
1026 PH/07 The error message for a badly-placed control=no_multiline_responses left
1027 "_responses" off the end of the name.
1029 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1031 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1032 (without spaces) instead of just copying the configuration text.
1034 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1036 PH/11 Added $max_received_linelength.
1038 PH/12 Added +ignore_defer and +include_defer to host lists.
1040 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1041 way in which PCRE > 7.0 is built.
1043 PH/14 Implemented queue_only_load_latch.
1045 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1046 MAIL command. The effect was to mangle the value on 64-bit systems.
1048 PH/16 Another patch from the Sieve maintainer.
1050 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1052 PH/18 If a system quota error occurred while trying to create the file for
1053 a maildir delivery, the message "Mailbox is full" was not appended to the
1054 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1055 only to a quota excession during the actual writing of the file.
1057 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1058 characters?) which causes problems in log lines. The DN values are now
1059 passed through string_printing() before being added to log lines.
1061 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1062 and InterBase are left for another time.)
1064 PH/21 Added message_body_newlines option.
1066 PH/22 Guard against possible overflow in moan_check_errorcopy().
1068 PH/23 POSIX allows open() to be a macro; guard against that.
1070 PH/24 If the recipient of an error message contained an @ in the local part
1071 (suitably quoted, of course), incorrect values were put in $domain and
1072 $local_part during the evaluation of errors_copy.
1078 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1079 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1082 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1083 issue a MAIL command.
1085 PH/02 In an ACL statement such as
1087 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1089 if a client was not listed at all, or was listed with a value other than
1090 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1091 the condition was not true (as it should be), so access was not denied.
1092 The bug was that the ! inversion was incorrectly passed on to the second
1093 item. This has been fixed.
1095 PH/03 Added additional dnslists conditions == and =& which are different from
1096 = and & when the dns lookup returns more than one IP address.
1098 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1099 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1101 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1102 FSYNC, which compiles an option called disable_fsync that allows for
1103 bypassing fsync(). The documentation is heavily laced with warnings.
1105 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1107 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1108 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1109 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1110 including adding "make clean"; (3) Added -fPIC when compiling the test
1111 dynamically loaded module, to get rid of a warning.
1113 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1114 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1115 = 0s. The bug is otherwise harmless.
1117 PH/07 There was a bug in the dovecot authenticator such that the value of
1118 $auth1 could be overwritten, and so not correctly preserved, after a
1119 successful authentication. This usually meant that the value preserved by
1120 the server_setid option was incorrect.
1122 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1124 PH/09 Installed PCRE release 7.0.
1126 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1127 run for batched SMTP input. It is now run at the start of every message
1128 in the batch. While fixing this I discovered that the process information
1129 (output by running exiwhat) was not always getting set for -bs and -bS
1130 input. This is fixed, and it now also says "batched" for BSMTP.
1132 PH/11 Added control=no_pipelining.
1134 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1135 patch, slightly modified), and move the expansion of helo_data till after
1136 the connection is made in the smtp transport (so it can use these
1139 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1141 PH/14 Added log_selector = +pid.
1143 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1145 PH/16 Add ${if forany and ${if forall.
1147 PH/17 Added dsn_from option to vary the From: line in DSNs.
1149 PH/18 Flush SMTP output before performing a callout, unless control =
1150 no_callout_flush is set.
1152 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1153 was true (the default) a successful delivery failed to delete the retry
1154 item, thus causing premature timeout of the address. The bug is now
1157 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1159 PH/21 Long custom messages for fakedefer and fakereject are now split up
1160 into multiline reponses in the same way that messages for "deny" and
1161 other ACL rejections are.
1163 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1164 with slight modification.
1166 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1167 draft, changing the syntax and factoring some duplicate code".
1169 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1170 for deliveries of the second and subsequent messages over the same SMTP
1173 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1174 ${reduce, with only minor "tidies".
1176 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1178 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1179 expansion side effects.
1181 PH/27 When a message times out after an over-quota error from an Exim-imposed
1182 quota, the bounce message says "mailbox is full". This message was not
1183 being given when it was a system quota that was exceeded. It now should
1186 MH/03 Made $recipients available in local_scan(). local_scan() already has
1187 better access to the recipient list through recipients_list[], but
1188 $recipients can be useful in postmaster-provided expansion strings.
1190 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1191 in the case of a MAIL command with additional options following the
1192 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1193 were accidentally chopped off.
1195 PH/29 SMTP synchronization checks are implemented when a command is read -
1196 there is a check that no more input is waiting when there shouldn't be
1197 any. However, for some commands, a delay in an ACL can mean that it is
1198 some time before the response is written. In this time, more input might
1199 arrive, invalidly. So now there are extra checks after an ACL has run for
1200 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1201 pipelining has not been advertised.
1203 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1205 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1206 returned in the SMTP response when smtp_return_error_details was false.
1207 This has been fixed.
1209 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1210 instead of the C I/O that was originally supplied, because problems were
1211 reported on Solaris.
1213 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1214 Exim which did not show up earlier: it was assuming that a call to
1215 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1216 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1217 was a macro that became an assignment, so it seemed to work. This has
1218 changed to a proper function call with a void return, hence the compile
1219 error. Exim's code has been fixed.
1221 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1224 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1226 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1228 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1229 because it turns out to be too big or there is a timeout) there is no
1230 "Completed" line in the log. When some messages of this type were
1231 selected by exigrep, they were listed as "not completed". Others were
1232 picked up by some special patterns. I have improved the selection
1233 criteria to be more general.
1235 PH/38 The host_find_failed option in the manualroute router can now be set
1236 to "ignore", to completely ignore a host whose IP address cannot be
1237 found. If all hosts are ignored, the behaviour is controlled by the new
1238 host_all_ignored option.
1240 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1241 homing or because of multiple MX records with /mx) generated more than
1242 one IP address, and the following item turned out to be the local host,
1243 all the secondary addresses of the first item were incorrectly removed
1244 from the list, along with the local host and any following hosts (which
1245 is what is supposed to happen).
1247 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1248 whoever called Exim into the -H file. In the case of the daemon it was
1249 behaving confusingly. When first started, it used values for whoever
1250 started the daemon, but after a SIGHUP it used the Exim user (because it
1251 calls itself on a restart). I have changed the code so that it now always
1254 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1255 message are rejected with the same error (e.g. no authentication or bad
1256 sender address), and a DATA command is nevertheless sent (as can happen
1257 with PIPELINING or a stupid MUA), the error message that was given to the
1258 RCPT commands is included in the rejection of the DATA command. This is
1259 intended to be helpful for MUAs that show only the final error to their
1262 PH/42 Another patch from the Sieve maintainer.
1264 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1265 Eximstats - Fixed some broken HTML links and added missing column headers
1267 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1268 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1270 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1272 PH/43 Yet another patch from the Sieve maintainer.
1274 PH/44 I found a way to check for a TCP/IP connection going away before sending
1275 the response to the final '.' that terminates a message, but only in the
1276 case where the client has not sent further data following the '.'
1277 (unfortunately, this is allowed). However, in many cases there won't be
1278 any further data because there won't be any more messages to send. A call
1279 to select() can be used: if it shows that the input is "ready", there is
1280 either input waiting, or the socket has been closed. An attempt to read
1281 the next input character can distinguish the two cases. Previously, Exim
1282 would have sent an OK response which the client would never have see.
1283 This could lead to message repetition. This fix should cure that, at
1284 least in a lot of common cases.
1286 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1287 advertised in response to EHLO.
1293 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1294 fixed by 4.65/MH/01 (is this a record?) are fixed:
1296 (i) An empty string was always treated as zero by the numeric comparison
1297 operators. This behaviour has been restored.
1299 (ii) It is documented that the numeric comparison operators always treat
1300 their arguments as decimal numbers. This was broken in that numbers
1301 starting with 0 were being interpreted as octal.
1303 While fixing these problems I realized that there was another issue that
1304 hadn't been noticed. Values of message_size_limit (both the global option
1305 and the transport option) were treated as octal if they started with 0.
1306 The documentation was vague. These values are now always treated as
1307 decimal, and I will make that clear in the documentation.
1313 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1314 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1317 MH/01 Don't check that the operands of numeric comparison operators are
1318 integers when their expansion is in "skipping" mode (fixes bug
1319 introduced by 4.64-PH/07).
1321 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1322 child addresses, Exim now panics and dies. Previously, because the count
1323 is held in a short int, deliveries were likely to be lost. As such a
1324 large number of recipients for a single message is ridiculous
1325 (performance will be very, very poor), I have chosen to impose a limit
1326 rather than extend the field.
1332 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1333 leftover -K file (the existence of which was triggered by #402).
1334 While we were at it, introduced process PID as part of the -K
1335 filename. This should rule out race conditions when creating
1338 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1339 processing considerably. Previous code took too long for large mails,
1340 triggering a timeout which in turn triggers #401.
1342 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1343 in the DK code in transports.c. sendfile() is not really portable,
1344 hence the _LINUX specificness.
1346 TF/01 In the add_headers option to the mail command in an Exim filter,
1347 there was a bug that Exim would claim a syntax error in any
1348 header after the first one which had an odd number of characters
1351 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1352 callout verification, Exim cached a "reject" for the entire domain. This
1353 is correct for most verifications, but it is not correct for a recipient
1354 verification with use_sender or use_postmaster set, because in that case
1355 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1356 case of MAIL FROM:<> rejection from other early rejections (e.g.
1357 rejection of HELO). When verifying a recipient using a non-null MAIL
1358 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1359 Whatever the result of the callout, the value of the domain cache is
1360 left unchanged (for any other kind of callout, getting as far as trying
1361 RCPT means that the domain itself is ok).
1363 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1366 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1367 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1368 session, the daemon ignores ECONNECT errors and logs others; it now
1369 ignores EPIPE as well.
1371 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1372 (quoted-printable decoding).
1374 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1375 later the small subsequent patch to fix an introduced bug.
1377 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1379 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1381 PH/08 An error is now given if message_size_limit is specified negative.
1383 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1384 to be given (somewhat) arbitrary names.
1386 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1389 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1390 miscellaneous code fixes
1392 PH/10 Added the log_reject_target ACL modifier to specify where to log
1395 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1396 hostname. This is wrong, because it relates to the incoming message (and
1397 probably the interface on which it is arriving) and not to the outgoing
1398 callout (which could be using a different interface). This has been
1399 changed to use the value of the helo_data option from the smtp transport
1400 instead - this is what is used when a message is actually being sent. If
1401 there is no remote transport (possible with a router that sets up host
1402 addresses), $smtp_active_hostname is used.
1404 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1405 tweaks were necessary in order to get it to work (see also 21 below):
1406 (a) The code assumed that strncpy() returns a negative number on buffer
1407 overflow, which isn't the case. Replaced with Exim's string_format()
1409 (b) There were several signed/unsigned issues. I just did the minimum
1410 hacking in of casts. There is scope for a larger refactoring.
1411 (c) The code used strcasecmp() which is not a standard C function.
1412 Replaced with Exim's strcmpic() function.
1413 (d) The code set only $1; it now sets $auth1 as well.
1414 (e) A simple test gave the error "authentication client didn't specify
1415 service in request". It would seem that Dovecot has changed its
1416 interface. Fortunately there's a specification; I followed it and
1417 changed what the client sends and it appears to be working now.
1419 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1422 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1423 address A is aliased to B and C, where B exists and C does not. Without
1424 -v the output is "A verified" because verification stops after a
1425 successful redirection if more than one address is generated. However,
1426 with -v the child addresses are also verified. Exim was outputting "A
1427 failed to verify" and then showing the successful verification for C,
1428 with its parentage. It now outputs "B failed to verify", showing B's
1429 parentage before showing the successful verification of C.
1431 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1432 look up a TXT record in a specific list after matching in a combined
1435 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1436 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1437 they consult the DNS. I had assumed they would set it the way they
1438 wanted; and indeed my experiments on Linux seem to show that in some
1439 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1440 To be on the safe side, however, I have now made the interface to
1441 host_find_byname() similar to host_find_bydns(), with an argument
1442 containing the DNS resolver options. The host_find_byname() function now
1443 sets these options at its start, just as host_find_bydns() does. The smtp
1444 transport options dns_qualify_single and dns_search_parents are passed to
1445 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1446 of host_find_byname() use the default settings of RES_DEFNAMES
1447 (qualify_single) but not RES_DNSRCH (search_parents).
1449 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1450 spool_read_header() do less string testing, by means of a preliminary
1451 switch on the second character of optional "-foo" lines. (This is
1452 overdue, caused by the large number of possibilities that now exist.
1453 Originally there were few.) While I was there, I also converted the
1454 str(n)cmp tests so they don't re-test the leading "-" and the first
1455 character, in the hope this might squeeze out yet more improvement.
1457 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1458 flag allowing group syntax was set by the header_syntax check but not
1459 turned off, possible causing trouble later; (2) The flag was not being
1460 set at all for the header_verify test, causing "group"-style headers to
1461 be rejected. I have now set it in this case, and also caused header_
1462 verify to ignore an empty address taken from a group. While doing this, I
1463 came across some other cases where the code for allowing group syntax
1464 while scanning a header line wasn't quite right (mostly, not resetting
1465 the flag correctly in the right place). These bugs could have caused
1466 trouble for malformed header lines. I hope it is now all correct.
1468 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1469 with the "reply" argument non-NULL. The code, however (which originally
1470 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1471 but it didn't always do it. This confused somebody who was copying the
1472 code for some other use. I have removed all the tests.
1474 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1475 feature that was used to support insecure browsers during the U.S. crypto
1476 embargo. It requires special client support, and Exim is probably the
1477 only MTA that supported it -- and would never use it because real RSA is
1478 always available. This code has been removed, because it had the bad
1479 effect of slowing Exim down by computing (never used) parameters for the
1480 RSA_EXPORT functionality.
1482 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1483 authenticator to fail if there's a tab character in the incoming data
1484 (there should never be unless someone is messing about, as it's supposed
1485 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1486 if the connection is using TLS or if the remote IP is the same as the
1487 local IP, and the "valid-client-cert option" if a client certificate has
1490 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1491 authenticators. This can be used for authorization after authentication
1492 succeeds. (In the case of plaintext, it servers for both authentication
1495 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1496 if any retry times were supplied.
1498 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1499 connection, where there is no client IP address to check. In this
1500 situation, the verify now always succeeds.
1502 PH/25 Applied John Jetmore's -Mset patch.
1504 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1506 PH/27 In a string expansion for a processed (not raw) header when multiple
1507 headers of the same name were present, leading whitespace was being
1508 removed from all of them, but trailing whitespace was being removed only
1509 from the last one. Now trailing whitespace is removed from each header
1510 before concatenation. Completely empty headers in a concatenation (as
1511 before) are ignored.
1513 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1514 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1516 PH/29 [Removed. This was a change that I later backed out, and forgot to
1517 correct the ChangeLog entry (that I had efficiently created) before
1518 committing the later change.]
1520 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1521 address errors (4xx response to RCPT) over the same connection as other
1522 messages routed to the same hosts. Such deliveries are always "forced",
1523 so retry times are not inspected. This resulted in far too many retries
1524 for the affected addresses. The effect occurred only when there were more
1525 hosts than the hosts_max_try setting in the smtp transport when it had
1526 the 4xx errors. Those hosts that it had tried were not added to the list
1527 of hosts for which the message was waiting, so if all were tried, there
1528 was no problem. Two fixes have been applied:
1530 (i) If there are any address or message errors in an SMTP delivery, none
1531 of the hosts (tried or untried) are now added to the list of hosts
1532 for which the message is waiting, so the message should not be a
1533 candidate for sending over the same connection that was used for a
1534 successful delivery of some other message. This seems entirely
1535 reasonable: after all the message is NOT "waiting for some host".
1536 This is so "obvious" that I'm not sure why it wasn't done
1537 previously. Hope I haven't missed anything, but it can't do any
1538 harm, as the worst effect is to miss an optimization.
1540 (ii) If, despite (i), such a delivery is accidentally attempted, the
1541 routing retry time is respected, so at least it doesn't keep
1542 hammering the server.
1544 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1545 in ${readsocket because some servers need this prod.
1547 PH/32 Added some extra debug output when updating a wait-xxx database.
1549 PH/33 The hint "could be header name not terminated by colon", which has been
1550 given for certain expansion errors for a long time, was not being given
1551 for the ${if def:h_colon_omitted{... case.
1553 PH/34 The spec says: "With one important exception, whenever a domain list is
1554 being scanned, $domain contains the subject domain." There was at least
1555 one case where this was not true.
1557 PH/35 The error "getsockname() failed: connection reset by peer" was being
1558 written to the panic log as well as the main log, but it isn't really
1559 panic-worthy as it just means the connection died rather early on. I have
1560 removed the panic log writing for the ECONNRESET error when getsockname()
1563 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1564 runs only) independently of the message's sender address. This meant
1565 that, if the 4xx error was in fact related to the sender, a different
1566 message to the same recipient with a different sender could confuse
1567 things. In particualar, this can happen when sending to a greylisting
1568 server, but other circumstances could also provoke similar problems.
1569 I have changed the default so that the retry time for these errors is now
1570 based a combination of the sender and recipient addresses. This change
1571 can be overridden by setting address_retry_include_sender=false in the
1574 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1575 remote server are returned as part of bounce messages. This was not
1576 happening for LMTP over a pipe (the lmtp transport), but now it is the
1577 same for both kinds of LMTP.
1579 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1580 in header lines that were in fact CNAMEs. This is no longer the case.
1582 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1583 and queue runs started by the daemon processed all messages. This has
1584 been fixed so that -R and -S can now usefully be given with -q<time>.
1586 PH/40 Import PCRE release 6.7 (fixes some bugs).
1588 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1590 PH/42 Give an error if -q is specified more than once.
1592 PH/43 Renamed the variables $interface_address and $interface_port as
1593 $received_ip_address and $received_port, to make it clear that these
1594 values apply to message reception, and not to the outgoing interface when
1595 a message is delivered. (The old names remain recognized, of course.)
1597 PH/44 There was no timeout on the connect() call when using a Unix domain
1598 socket in the ${readsocket expansion. There now is.
1600 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1601 be meaningful with "accept".
1603 SC/01 Eximstats V1.43
1604 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1606 SC/02 Eximstats V1.44
1607 Use a glob alias rather than an array ref in the generated
1608 parser. This improves both readability and performance.
1610 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1611 Collect SpamAssassin and rejection statistics.
1612 Don't display local sender or destination tables unless
1613 there is data to show.
1614 Added average volumes into the top table text output.
1616 SC/04 Eximstats V1.46
1617 Collect data on the number of addresses (recipients)
1618 as well as the number of messages.
1620 SC/05 Eximstats V1.47
1621 Added 'Message too big' to the list of mail rejection
1622 reasons (thanks to Marco Gaiarin).
1624 SC/06 Eximstats V1.48
1625 Mainlog lines which have GMT offsets and are too short to
1626 have a flag are now skipped.
1628 SC/07 Eximstats V1.49 (Alain Williams)
1629 Added the -emptyok flag.
1631 SC/08 Eximstats V1.50
1632 Fixes for obtaining the IP address from reject messages.
1634 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1635 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1636 whitesspace changes from 4.64-PH/27
1638 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1641 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1642 are found, allow negative numbers in numeric criteria)
1644 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1646 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1647 to match changes made in 4.64-PH/43
1649 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1651 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1652 "domain" is actually an IP address, and force a failure. This locks out
1653 those revolvers/nameservers that support "A-for-A" lookups, in
1654 contravention of the specifications.
1656 PH/48 When a host name was looked up from an IP address, and the subsequent
1657 forward lookup of the name timed out, the host name was left in
1658 $sender_host_name, contrary to the specification.
1660 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1661 restricted to single-key lookups, Exim was not diagnosing an error if
1662 * or *@ was used with a query-style lookup.
1664 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1666 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1667 long ago, but noone interested enough thought of it. Let's just say that
1668 the "1.1" means that there are some new functions that weren't there at
1669 some point in the past.
1671 PH/51 Error processing for expansion failure of helo_data from an smtp
1672 transport during callout processing was broken.
1674 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1675 tested/used via the -bh/-bhc/-bs options.
1677 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1678 bug, fixed in subsequent PCRE releases).
1680 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1681 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1683 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1689 SC/01 Use a glob alias rather than an array ref in eximstats generated
1690 parser. This improves both readability and performance.
1692 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1693 Don't display local sender or destination tables in eximstats unless
1694 there is data to show.
1695 Added average volumes into the eximstats top table text output.
1697 SC/03 Collect data on the number of addresses (recipients) as well
1698 as the number of messages in eximstats.
1700 TF/01 Correct an error in the documentation for the redirect router. Exim
1701 does (usually) call initgroups() when daemonizing.
1703 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1704 with consistent privilege compared to when running as a daemon.
1706 TF/03 Note in the spec that $authenticated_id is not set for local
1707 submissions from trusted users.
1709 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1710 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1712 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1713 by adding some example configuration directives to the default
1714 configuration file. A little bit of work is required to uncomment the
1715 directives and define how usernames and passwords are checked, but
1716 there is now a framework to start from.
1718 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1719 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1720 without this. I don't know how relevant this is to other LDAP libraries.
1722 PH/02 Add the verb name to the "unknown ACL verb" error.
1724 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1726 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1728 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1729 directory not expanded when it should be if an expanded home directory
1730 was set for the address (which is overridden by the transport).
1732 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1735 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1736 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1737 because it is too late at that time, and has no effect.
1739 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1740 security issue with \' (bugzilla #107). I could not use the
1741 PQescapeStringConn() function, because it needs a PGconn value as one of
1744 PH/08 When testing addresses using -bt, indicate those final addresses that
1745 are duplicates that would not cause an additional delivery. At least one
1746 person was confused, thinking that -bt output corresponded to deliveries.
1747 (Suppressing duplicates isn't a good idea as you lose the information
1748 about possibly different redirections that led to the duplicates.)
1750 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1751 systems where poll() doesn't work, in particular OS X.
1753 PH/10 Added more information to debugging output for retry time not reached.
1755 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1756 operations in malware.c.
1758 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1761 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1762 syslog_duplication set false, log lines that would normally be written
1763 both the the main log and to the reject log were not written to syslog at
1766 PH/14 In the default configuration, change the use of "message" in ACL warn
1767 statements to "add_header".
1769 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1770 not followed by a command (e.g. "seen endif").
1772 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1773 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1776 PH/17 Added extra conditions to the default value of delay_warning_condition
1780 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1781 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1782 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1785 The Auto-Submitted: and various List- headers are standardised, whereas I
1786 don't think Precedence: ever was.
1788 PH/18 Refactored debugging code in route_finduser() to show more information,
1789 in particular, the error code if getpwnam() issues one.
1791 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1792 This is apparently needed in addition to the PH/07 change above to avoid
1793 any possible encoding problems.
1795 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1796 but not after initializing Perl.
1798 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1799 output them only if debugging. By default they are written stderr,
1800 apparently, which is not desirable.
1802 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1805 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1808 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1810 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1811 authenticated or an ident call has been made. Suppress the default
1812 values for $authenticated_id and $authenticated_sender (but permit -oMai
1813 and -oMas) when testing with -bh.
1815 PH/24 Re-jigged the order of the tests in the default configuration so that the
1816 tests for valid domains and recipients precede the DNS black list and CSA
1817 tests, on the grounds that those ones are more expensive.
1819 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1820 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1821 This bug exists in every version of Exim that I still have, right back to
1824 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1825 However, an attempt to turn on case-sensitivity in a regex key by
1826 including (?-i) didn't work because the subject string was already
1827 lowercased, and the effects were non-intuitive. It turns out that a
1828 one-line patch can be used to allow (?-i) to work as expected.
1834 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1835 other effects) broke the use of negated acl sub-conditions.
1837 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1840 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1841 "Deny" causes Exim to reject the incoming connection with a 554 error.
1842 Unfortunately, if there is a major crisis, such as a disk failure,
1843 tcp-wrappers gives "deny", whereas what one would like would be some
1844 kind of temporary error. A kludge has been added to help with this.
1845 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1846 554 error is used if errno is still zero or contains ENOENT (which occurs
1847 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1850 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1852 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1853 errors. Otherwise a message that provokes a temporary error (when other
1854 messages do not) can cause a whole host to time out.
1856 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1857 addresses were routed directly to files or pipes from a redirect router.
1858 File deliveries just didn't batch; pipe deliveries might have suffered
1861 PH/06 A failure to get a lock for a hints database would erroneously always say
1862 "Failed to get write lock", even when it was really a read lock.
1864 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1865 of 0600. This has been changed to use the value of the lockfile_mode
1866 option (which defaults to 0600).
1868 PH/08 Applied small patch from the Sieve maintainer.
1870 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1871 folder from quota calculations, a direct delivery into this folder messed
1872 up the contents of the maildirsize file. This was because the regex was
1873 used only to exclude .Trash (or whatever) when the size of the mailbox
1874 was calculated. There was no check that a delivery was happening into an
1875 excluded directory. This bug has been fixed by ignoring all quota
1876 processing for deliveries into excluded directories.
1878 PH/10 Added the maildirfolder_create_regex option to appendfile.
1884 PH/01 The code for finding all the local interface addresses on a FreeBSD
1885 system running IPv6 was broken. This may well have applied to all BSD
1886 systems, as well as to others that have similar system calls. The broken
1887 code found IPv4 interfaces correctly, but gave incorrect values for the
1888 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1889 that it would not match correctly against @[] and not recognize the IPv6
1892 PH/02 The ipliteral router was not recognizing addresses of the form user@
1893 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1895 PH/03 Added disable_ipv6.
1897 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1898 decoded form, because it is most often used to construct To: headers
1899 lines in autoreplies, and the decoded form may well be syntactically
1900 invalid. However, $reply_address has leading white space removed, and all
1901 newlines turned into spaces so that the autoreply transport does not
1904 PH/05 If group was specified without a user on a router, and no group or user
1905 was specified on a transport, the group from the router was ignored.
1907 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1908 for visible compile-time settings that can be used to change these
1909 numbers, for those that want even more. Backwards compatibility with old
1910 spool files has been maintained. However, going back to a previous Exim
1911 release will lost any variables that are in spool files.
1913 PH/07 Two small changes when running in the test harness: increase delay when
1914 passing a TCP/IP connection to a new process, in case the original
1915 process has to generate a bounce, and remove special handling of
1916 127.0.0.2 (sic), which is no longer necessary.
1918 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1919 be the same on different OS.
1921 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1924 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1925 whether --show-vars was specified or not
1927 JJ/02 exipick: Added support for new ACL variable spool format introduced
1930 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1931 syntactically invalid From: or Reply-to: line, and a filter used this to
1932 generate an autoreply, and therefore failed to obtain an address for the
1933 autoreply, Exim could try to deliver to a non-existent relative file
1934 name, causing unrelated and misleading errors. What now happens is that
1935 it logs this as a hard delivery error, but does not attempt to create a
1938 PH/11 The exinext utility has a -C option for testing purposes, but although
1939 the given file was scanned by exinext itself; it wasn't being passed on
1940 when Exim was called.
1942 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1943 an end-of-file indication when reading a command response.
1945 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1946 compiled. In many other places in Exim, IPv6 addresses are always
1947 recognized, so I have changed this. It also means that IPv4 domain
1948 literals of the form [IPV4:n.n.n.n] are now always recognized.
1950 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1951 used if the router is not running as root, for example, when verifying at
1952 ACL time, or when using -bh. The debugging output from this situation was
1953 non-existent - all you got was a failure to exec. I have made two
1956 (a) Failures to set uid/gid, the current directory, or a process leader
1957 in a subprocess such as that created by queryprogram now generate
1958 suitable debugging ouput when -d is set.
1960 (b) The queryprogram router detects when it is not running as root,
1961 outputs suitable debugging information if -d is set, and then runs
1962 the subprocess without attempting to change uid/gid.
1964 PH/15 Minor change to Makefile for building test_host (undocumented testing
1967 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1968 additional section of a DNS packet that returns MX or SRV records.
1969 Instead, it always explicitly searches for A/AAAA records. This avoids
1970 major problems that occur when a DNS server includes only records of one
1971 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1972 fixed another bug: if SRV records were looked up and the corresponding
1973 address records were *not* found in the additional section, the port
1974 values from the SRV records were lost.
1976 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1977 using the correct key (the original address) when searching the retry
1978 rules in order to find which one to use for generating the retry hint.
1980 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1981 adding the default one. Similarly, if it contains a Reply-To: header, the
1982 errors_reply_to option, if set, is not used.
1984 PH/19 When calculating a retry time, Exim used to measure the "time since
1985 failure" by looking at the "first failed" field in the retry record. Now
1986 it does not use this if it is later than than the arrival time of the
1987 message. Instead it uses the arrival time. This makes for better
1988 behaviour in cases where some deliveries succeed, thus re-setting the
1989 "first failed" field. An example is a quota failure for a huge message
1990 when small messages continue to be delivered. Without this change, the
1991 "time since failure" will always be short, possible causing more frequent
1992 delivery attempts for the huge message than are intended.
1993 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1995 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1996 $1, $2, $3) because the numerical variables can be reset during some
1997 expansion items (e.g. "match"), thereby losing the authentication data.
1999 PH/21 Make -bV show the size of off_t variables so that the test suite can
2000 decide whether to run tests for quotas > 2G.
2002 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2003 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2004 filecount value is greater than 2G or if a quota value is greater than 2G
2005 on a system where the size of off_t is not greater than 4, a panic error
2008 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2009 never match. The debug and -bh output now contains an explicit error
2010 message indicating a malformed IPv4 address or mask.
2012 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2013 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2014 PH/23 above applies.
2016 PH/25 Do not write to syslog when running in the test harness. The only
2017 occasion when this arises is a failure to open the main or panic logs
2018 (for which there is an explicit test).
2020 PH/26 Added the /no_tell option to "control=freeze".
2022 PH/27 If a host name lookup failed very early in a connection, for example, if
2023 the IP address matched host_lookup and the reverse lookup yielded a name
2024 that did not have a forward lookup, an error message of the form "no IP
2025 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2026 could be logged. Now it outputs the IP address instead of "NULL".
2028 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2029 allows the sender and the authenticated sender to be set when
2030 submitting a message from within Exim. Since child_open_exim() is
2031 documented for local_scan(), the new function should be too.
2033 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2034 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2035 results in an empty string is now treated as unset.
2037 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2039 PH/31 Added sender_verify_fail logging option.
2041 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2042 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2043 tidied the source and removed it altogether.
2045 PH/33 When a queue run was abandoned because the load average was too high, a
2046 log line was always written; now it is written only if the queue_run log
2047 selector is set. In addition, the log line for abandonment now contains
2048 information about the queue run such as the pid. This is always present
2049 in "start" and "stop" lines but was omitted from the "abandon" line.
2051 PH/34 Omit spaces between a header name and the colon in the error message that
2052 is given when verify = headers_syntax fails (if there are lots of them,
2053 the message gets confusing).
2055 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2056 names, as there are now some PTR records that contain slashes. This check
2057 is only to protect against broken name servers that fall over on strange
2058 characters, so the fact that it applies to all lookups doesn't matter.
2060 PH/36 Now that the new test suite is complete, we can remove some of the
2061 special code in Exim that was needed for the old test suite. For example,
2062 sorting DNS records because real resolvers return them in an arbitrary
2063 order. The new test suite's fake resolver always returns records in the
2066 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2067 bounces) except when queue_only is set, to avoid logging races between
2068 the different processes.
2070 PH/38 Panic-die if .include specifies a non-absolute path.
2072 PH/39 A tweak to the "H" retry rule from its user.
2074 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2075 a label. They prevented compilation on older perls.
2077 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2078 a warning to be raised on newish perls.
2080 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2081 on queue. Changes to match documented behaviour of showing count of
2082 messages matching specified criteria.
2084 PH/40 Changed the default ident timeout from 30s to 5s.
2086 PH/41 Added support for the use of login_cap features, on those BSD systems
2087 that have them, for controlling the resources used by pipe deliveries.
2089 PH/42 The content-scanning code uses fopen() to create files in which to put
2090 message data. Previously it was not paying any attention to the mode of
2091 the files. Exim runs with umask(0) because the rest of the code creates
2092 files with open(), and sets the required mode explicitly. Thus, these
2093 files were ending up world-writeable. This was not a big issue, because,
2094 being within the spool directory, they were not world-accessible. I have
2095 created a function called modefopen, which takes an additional mode
2096 argument. It sets umask(777), creates the file, chmods it to the required
2097 mode, then resets the umask. All the relevant calls to fopen() in the
2098 content scanning code have been changed to use this function.
2100 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2101 to 24 hours. This avoids potential overflow problems when processing G
2102 and H retry rules. I suspect nobody ever tinkers with this value.
2104 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2106 PH/45 When the plaintext authenticator is running as a client, the server's
2107 challenges are checked to ensure they are valid base64 strings. By
2108 default, the authentication attempt is cancelled if an invalid string is
2109 received. Setting client_ignore_invalid_base64 true ignores these errors.
2110 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2111 they are received. Thus, the responses can be made to depend on the
2112 challenges. If an invalid string is ignored, an empty string is placed in
2115 PH/46 Messages that are created by the autoreply transport now contains a
2116 References: header, in accordance with RFCs 2822 and 3834.
2118 PH/47 Added authenticated_sender_force to the smtp transport.
2120 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2122 PH/49 Installed latest patch from the Sieve maintainer.
2124 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2125 was also set, the appendfile transport was unnecessarily scanning a
2126 directory of message files (e.g. for maildir delivery) to find the count
2127 of files (along with the size), even though it did not need this
2128 information. It now does the scan only if it needs to find either the
2129 size of the count of files.
2131 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2133 PH/52 Two bugs concerned with error handling when the smtp transport is
2136 (i) Exim was not creating retry information for temporary errors given
2137 for individual recipients after the DATA command when the smtp transport
2138 was used in LMTP mode. This meant that they could be retried too
2139 frequently, and not timed out correctly.
2141 (ii) Exim was setting the flag that allows error details to be returned
2142 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2143 recipients that were returned after the DATA command.
2145 PH/53 This is related to PH/52, but is more general: for any failing address,
2146 when detailed error information was permitted to be returned to the
2147 sender, but the error was temporary, then after the final timeout, only
2148 "retry timeout exceeded" was returned. Now it returns the full error as
2149 well as "retry timeout exceeded".
2151 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2152 do this, and (what is worse) MTAs that accept it.
2154 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2155 will now be deprecated.
2157 PH/56 New os.c-cygwin from the Cygwin maintainer.
2159 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2160 formats (previously only available in exim formats via -bpr, -bpru,
2161 and -bpra. Now also available in native and exiqgrep formats)
2163 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2164 with very large, slow to parse queues
2166 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2168 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2170 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2171 responses to authentication challenges, though it was showing the
2172 challenges; (ii) I've removed the CR characters from the debug output for
2175 PH/58 Allow for the insertion of a newline as well as a space when a string
2176 is turned into more than one encoded-word during RFC 2047 encoding. The
2177 Sieve code now uses this.
2179 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2180 data_4xx, lost_connection, tls_required.
2182 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2183 message was being sent as an SMTP response.
2185 PH/61 Add -l and -k options to exicyclog.
2187 PH/62 When verifying, if an address was redirected to one new address, so that
2188 verification continued, and the new address failed or deferred after
2189 having set something in $address_data, the value of $address_data was not
2190 passed back to the ACL. This was different to the case when no
2191 redirection occurred. The value is now passed back in both cases.
2193 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2194 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2195 use login_cap.h, so on its own it isn't the distinguishing feature. The
2196 new name refers directly to the setclassresources() function.
2198 PH/65 Added configuration files for NetBSD3.
2200 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2202 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2203 is preferred over IPv4.
2205 PH/68 The bounce_return_message and bounce_return_body options were not being
2206 honoured for bounces generated during the reception of non-SMTP messages.
2207 In particular, this applied to messages rejected by the ACL. This bug has
2208 been fixed. However, if bounce_return_message is true and bounce_return_
2209 body is false, the headers that are returned for a non-SMTP message
2210 include only those that have been read before the error was detected.
2211 (In the case of an ACL rejection, they have all been read.)
2213 PH/69 The HTML version of the specification is now built in a directory called
2214 spec_html instead of spec.html, because the latter looks like a path with
2215 a MIME-type, and this confuses some software.
2217 PH/70 Catch two compiler warnings in sieve.c.
2219 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2220 function verify_get_ident() calls ip_connect() to connect a socket, but
2221 if the "connect()" function timed out, ip_connect() used to close the
2222 socket. However, verify_get_ident() also closes the socket later, and in
2223 between Exim writes to the log, which may get opened at this point. When
2224 the socket was closed in ip_connect(), the log could get the same file
2225 descriptor number as the socket. This naturally causes chaos. The fix is
2226 not to close the socket in ip_connect(); the socket should be closed by
2227 the function that creates it. There was only one place in the code where
2228 this was missing, in the iplookup router, which I don't think anybody now
2229 uses, but I've fixed it anyway.
2231 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2232 well as to direct DNS lookups. Otherwise the handling of names in host
2233 lists is inconsistent and therefore confusing.
2239 PH/01 Two changes to the default runtime configuration:
2241 (1) Move the checks for relay_from_hosts and authenticated clients from
2242 after to before the (commented out) DNS black list checks.
2244 (2) Add control=submission to the relay_from_hosts and authenticated
2245 clients checks, on the grounds that messages accepted by these
2246 statements are most likely to be submissions.
2248 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2250 (1) Generate an error if the third argument for the ${prvs expansion is
2253 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2256 (3) Reset the variables that are obtained from the first argument of
2257 ${prvscheck and used in the second argument before leaving the code,
2258 because their memory is reclaimed, so using them afterwards may do
2261 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2262 one (it's much easier than Tom thought :-).
2264 (5) Because of (4), we can now allow for the use of $prvscheck_result
2265 inside the third argument.
2267 PH/03 For some reason, the default setting of PATH when running a command from
2268 a pipe transport was just "/usr/bin". I have changed it to
2271 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2272 anything to be listed in the output from -bV.
2274 PH/05 When a filter generated an autoreply, the entire To: header line was
2275 quoted in the delivery log line, like this:
2277 => >A.N.Other <ano@some.domain> <original@ddress> ...
2279 This has been changed so that it extracts the operative address. There
2280 may be more than one such address. If so, they are comma-separated, like
2283 => >ano@some.domain,ona@other.domain <original@ddress> ...
2285 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2286 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2287 not being looked up in the rDNS to get a host name, Exim was showing the
2288 IP address twice in Received: lines, even though the IP addresses were
2289 identical. For example:
2291 Received: from [1.2.3.4] (helo=[1.2.3.4])
2293 However, if the real host name was known, it was omitting the HELO data
2294 if it matched the actual IP address. This has been tidied up so that it
2295 doesn't show the same IP address twice.
2297 PH/07 When both +timestamp and +memory debugging was on, the value given by
2298 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2299 called by the debug printing, thereby overwriting the timestamp buffer.
2300 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2302 PH/08 When the original message was included in an autoreply transport, it
2303 always said "this is a copy of the message, including all the headers",
2304 even if body_only or headers_only was set. It now gives an appropriate
2307 PH/09 Applied a patch from the Sieve maintainer which:
2309 o fixes some comments
2310 o adds the (disabled) notify extension core
2311 o adds some debug output for the result of if/elsif tests
2312 o points to the current vacation draft in the documentation
2313 and documents the missing references header update
2317 o fixes a bug in processing the envelope test (when testing
2318 multiple envelope elements, the last element determinted the
2321 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2322 Electronic Mail") by including:
2324 Auto-submitted: auto-generated
2326 in the messages that it generates (bounce messages and others, such as
2327 warnings). In the case of bounce messages for non-SMTP mesages, there was
2328 also a typo: it was using "Auto_submitted" (underscore instead of
2329 hyphen). Since every message generated by Exim is necessarily in response
2330 to another message, thes have all been changed to:
2332 Auto-Submitted: auto-replied
2334 in accordance with these statements in the RFC:
2336 The auto-replied keyword:
2338 - SHOULD be used on messages sent in direct response to another
2339 message by an automatic process,
2341 - MUST NOT be used on manually-generated messages,
2343 - MAY be used on Delivery Status Notifications (DSNs) and Message
2344 Disposition Notifications (MDNs),
2346 - MUST NOT be used on messages generated by automatic or periodic
2347 processes, except for messages which are automatic responses to
2350 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2351 to the default Received: header definition.
2353 PH/12 Added log selector acl_warn_skipped (default on).
2355 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2356 variables because (a) they are in the wrong storage pool and (b) even if
2357 they were copied, it wouldn't work properly because of the caching.
2359 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2360 checking when decoding. Apparently there are clients that generate
2361 overlong encoded strings. Why am I not surprised?
2363 PH/15 If the first argument of "${if match_address" was not empty, but did not
2364 contain an "@" character, Exim crashed. Now it writes a panic log message
2365 and treats the condition as false.
2367 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2369 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2370 extension "envelope-auth". The code is finished and in agreement with
2371 other implementations, but there is no documentation so far and in fact,
2372 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2373 not changing the active code.
2375 Print executed "if" and "elsif" statements when debugging is used. This
2376 helps a great deal to understand what a filter does.
2378 Document more things not specified clearly in RFC3028. I had all this
2379 sorted out, when out of a sudden new issues came to my mind. Oops."
2381 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2384 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2385 canonical form (as documented). However, after a host name lookup from
2386 the IP address, check_host() was doing a simple string comparison with
2387 addresses acquired from the DNS when checking that the found name did
2388 have the original IP as one of its addresses. Since any found IPv6
2389 addresses are likely to be in abbreviated form, the comparison could
2390 fail. Luckily, there already exists a function for doing the comparison
2391 by converting both addresses to binary, so now that is used instead of
2392 the text comparison.
2394 PH/20 There was another similar case to PH/19, when a complete host name was
2395 given in a host list; looking up its IP address could give an abbreviated
2396 form, whereas the current host's name might or might not be abbreviated.
2397 The same fix has been applied.
2403 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2404 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2407 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2408 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2410 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2412 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2413 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2414 Also, for "Auto-Submitted", treat anything other than "no" as
2415 non-personal, in accordance with RFC 3834. (Previously it treated
2416 anything starting "auto-" as non-personal.)
2418 TF/01 The control=submission/name=... option had a problem with syntax
2419 errors if the name included a slash character. The /name= option
2420 now slurps the rest of the string, so it can include any characters
2421 but it must come last in the list of options (after /sender_retain
2424 PH/05 Some modifications to the interface to the fake nameserver for the new
2432 TK/01 Added the "success_on_redirect" address verification option. See
2433 NewStuff for rationale and an example.
2435 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2437 PH/02 Patch to exigrep to allow it to work on syslog lines.
2439 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2440 fread() to skip over the body file's header line, because in Cygwin the
2441 header line is locked and is inaccessible.
2443 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2444 co-exist for some time) to make it clear that it is the Exim ID that is
2445 referenced, not the Message-ID: header line.
2447 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2448 string_format() function, because snprintf() does not exist on all
2451 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2452 ${stat: expansion item.
2454 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2455 protocol synchronization error", to keep the pedants happy.
2457 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2458 well as for IRIX systems, when gcc is being used. See the host.c source
2461 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2463 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2466 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2467 transport and to the smtp transport in LMTP mode.
2469 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2471 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2472 run a filter in a subprocess. This could lead to confusion in subsequent
2473 lookups in the parent process. There should also be a search_tidyup() at
2474 the end of the subprocess.
2476 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2477 only if the host matched helo_try_verify_hosts, which caused the
2478 verification to occur when the EHLO/HELO command was issued. The ACL just
2479 tested the remembered result. Now, if a previous verification attempt has
2480 not happened, "verify = helo" does it there and then.
2482 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2484 TK/03 Fix log output including CR from clamd.
2486 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2487 exist provoked a memory error which could cause a segfault.
2489 PH/15 Installed PCRE 6.2
2491 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2493 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2494 of the problem. Specifically, suggested +O2 rather than +O1 for the
2497 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2499 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2500 record, the port was not correctly logged when the outgoing_port log
2501 selector was set (it logged the transort's default port).
2503 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2504 fallback_hosts, and "hosts" in the smtp transport.
2506 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2507 host errors such as "Connection refused".
2509 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2510 authentication with radiusclient 0.4.9:
2512 - Error returned from rc_read_config was caught wrongly
2513 - Username/password not passed on to radius server due to wrong length.
2515 The presumption is that some radiusclient API changes for 4.51/PH/17
2516 were not taken care of correctly. The code is still untested by me (my
2517 Linux distribution still has 0.3.2 of radiusclient), but it was
2518 contributed by a Radius user.
2520 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2521 expanding the "port" option of the smtp transport.
2523 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2524 while reading a MIME header. Thanks to Tom Hughes for a patch.
2526 PH/24 Include config.h inside local_scan.h so that configuration settings are
2529 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2530 that in an ACL for RCPT (for example), you can examine exactly what was
2533 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2534 commands, but it was not correctly comparing the address with the actual
2535 client host address. Thus, it would show the EHLO address in Received:
2536 header lines when this was not necessary.
2538 PH/27 Added the % operator to ${eval:}.
2540 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2541 it should be ignoring failures (because with -C, for example, it has lost
2542 privilege). It wasn't ignoring creation failures other than "already
2545 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2548 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2549 because an input line was too long, either on its own, or by virtue of
2550 too many continuations, the temporary file was not being removed, and the
2551 return code was incorrect.
2553 PH/31 Missing "BOOL" in function definition in filtertest.c.
2555 PH/32 Applied Sieve patches from the maintainer.
2557 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2559 PH/33 Added "verify = not_blind".
2561 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2562 Local/Makefile (with some defaults set). These are used in built scripts
2563 such as exicyclog, but they have never been used in the exim_install
2564 script (though there are many overriding facilities there). I have
2565 arranged that the exim_install script now takes note of these two
2568 PH/35 Installed configuration files for Dragonfly.
2570 PH/36 When a locally submitted message by a trusted user did not contain a
2571 From: header, and the sender address was obtained from -f or from an SMTP
2572 MAIL command, and the trusted user did not use -F to supply a sender
2573 name, $originator_name was incorrectly used when constructing a From:
2574 header. Furthermore, $originator_name was used for submission mode
2575 messages from external hosts without From: headers in a similar way,
2576 which is clearly wrong.
2578 PH/37 Added control=suppress_local_fixups.
2580 PH/38 When log_selector = +received_sender was set, and the addition of the
2581 sender made the log line's construction buffer exactly full, or one byte
2582 less than full, an overflow happened when the terminating "\n" was
2585 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2586 when the result of a list match is failure because a DNS lookup failed.
2588 PH/40 RM_COMMAND is now used in the building process.
2590 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2591 the "build-* directories that it finds.
2593 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2594 address in a domain literal was a prefix of an interface address.
2596 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2597 when verifying a sender address, unless rewrite_headers is false.
2599 PH/44 Wrote a long comment about why errors_to addresses are verified as
2600 recipients, not senders.
2602 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2603 the ratelimit ACL was added.
2605 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2607 PH/46 Added extra information about PostgreSQL errors to the error string.
2609 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2610 avoiding the need to install special zones in a real server. This is
2611 backwards compatible; if it can't find the fake resolver, it drops back.
2612 Thus, both old and new test suites can be run.
2614 TF/02 Added util/ratelimit.pl
2616 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2617 clock is set back in time.
2619 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2620 Candler <B.Candler@pobox.com>.
2622 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2623 OK for addresses that are the result of redirections.
2625 PH/48 A number of further additions for the benefit of the new test suite,
2626 including a fake gethostbyname() that interfaces to the fake DNS resolver
2629 TF/06 The fix for widen_domains has also been applied to qualify_single and
2630 search_parents which are the other dnslookup options that can cause
2633 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2636 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2638 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2639 service" if it encountered an MX record with an empty target hostname.
2640 The message is now "an MX or SRV record indicated no SMTP service".
2642 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2643 if the DNS of the sending site is misconfigured. This is quite a
2644 common situation. This change restores the behaviour of treating a
2645 helo verification defer as a failure.
2647 PH/51 If self=fail was set on a router, the bounce message did not include the
2648 actual error message.
2654 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2656 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2657 command itself ended in error, the underlying message about the transport
2658 filter timeout was being overwritten with the pipe command error. Now the
2659 underlying error message should be appended to the second error message.
2661 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2663 PH/02 Reduce the amount of output that "make" produces by default. Full output
2664 can still be requested.
2666 PH/03 The warning log line about a condition test deferring for a "warn" verb
2667 was being output only once per connection, rather than after each
2668 occurrence (because it was using the same function as for successful
2669 "warn" verbs). This seems wrong, so I have changed it.
2671 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2672 it should not have, which might have caused a crash in the right
2673 circumstances, but probably never did.
2675 PH/04 Installed a modified version of Tony Finch's patch to make submission
2676 mode fix the return path as well as the Sender: header line, and to
2677 add a /name= option so that you can make the user's friendly name appear
2680 TF/03 Added the control = fakedefer ACL modifier.
2682 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2683 Mark Lowes for thorough testing.
2685 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2687 TK/03 Merged latest SRS patch from Miles Wilton.
2689 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2690 with the definition in sysexits.h (which is #included earlier).
2691 Fortunately, Exim does not actually use EX_OK. The code used to try to
2692 preserve the sysexits.h value, by assumimg that macro definitions were
2693 scanned for macro replacements. I have been disabused of this notion,
2694 so now the code just undefines EX_OK before #including unistd.h.
2696 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2697 in the smtp transport. When a block could not be written in a single
2698 write() function, the timeout was being re-applied to each part-write.
2699 This seems wrong - if the receiver was accepting one byte at a time it
2700 would take for ever. The timeout is now adjusted when this happens. It
2701 doesn't have to be particularly precise.
2703 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2704 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2706 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2707 without a domain if the check to <postmaster@domain> fails.
2709 SC/01 Eximstats: added -xls and the ability to specify output files
2710 (patch written by Frank Heydlauf).
2712 SC/02 Eximstats: use FileHandles for outputing results.
2714 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2716 SC/04 Eximstats: fixed display of large numbers with -nvr option
2718 SC/05 Eximstats: fixed merging of reports with empty tables.
2720 SC/06 Eximstats: added the -include_original_destination flag
2722 SC/07 Eximstats: removed tabs and trailing whitespace.
2724 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2726 TK/06 MBOX spool code: Add real "From " MBOX separator line
2727 so the .eml file is really in mbox format (even though
2728 most programs do not really care). Patch from Alex Miller.
2730 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2731 The latter is generated from $received_to and is only set if the
2732 message has one envelope recipient. SA can use these headers,
2733 obviously out-of-the-box. Patch from Alex Miller.
2735 PH/08 The ${def test on a variable was returning false if the variable's
2736 value was "0", contrary to what the specification has always said!
2737 The result should be true unless the variable is empty.
2739 PH/09 The syntax error of a character other than { following "${if
2740 def:variable_name" (after optional whitespace) was not being diagnosed.
2741 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2742 accidental colon was present, for example, could give incorrect results.
2744 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2745 result is used (not including appendfile, where other changes are about
2748 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2749 This involved changing a lot of size variables from int to off_t. It
2750 should work with maildirs and everything.
2752 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2753 spamd dying while we are connected to it.
2755 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2758 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2759 function for BDB 4.3.
2761 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2763 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2764 the sources for PCRE have been re-arranged and more files are now
2767 PH/15 The code I had for printing potentially long long variables in PH/11
2768 above was not the best (it lost precision). The length of off_t variables
2769 is now inspected at build time, and an appropriate printing format (%ld
2770 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2771 to be "long long int" or "long int". This is needed for the internal
2772 formatting function string_vformat().
2774 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2775 the configuration file to be ":syslog", then the script "guesses" where
2776 the logs files are, rather than using the compiled in default. In our
2777 case the guess is not the same as the compiled default, so the script
2778 suddenly stopped working when I started to use syslog. The patch checks
2779 to see if log_file_path is "". If so, it attempts to read it from exim
2780 with no configuration file to get the compiled in version, before it
2781 falls back to the previous guessing code."
2783 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2784 implementing BATV in an Exim configuration. See NewStuff for the gory
2787 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2788 Makefile that are specific to HP-UX.
2790 PH/18 If the "use_postmaster" option was set for a recipient callout together
2791 with the "random" option, the postmaster address was used as the MAIL
2792 FROM address for the random test, but not for the subsequent recipient
2793 test. It is now used for both.
2795 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2796 patch removes a few documentation additions to RFC 3028, because the
2797 latest draft now contains them. It adds the new en;ascii-case comparator
2798 and a new error check for 8bit text in MIME parts. Comparator and
2799 require names are now matched exactly. I enabled the subaddress
2800 extension, but it is not well tested yet (read: it works for me)."
2802 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2803 rework some of the code of TK/09 above to avoid the hardwired use of
2804 "%lld" and "long long". Replaced the call to snprintf() with a call to
2807 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2808 records point to non-existent hosts", "retry timeout exceeded", and
2809 "retry time not reached for any host after a long failure period".
2811 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2812 experimental DomainKeys support:
2814 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2815 (2) On an error such as an illegally used "control", the wrong name for
2816 the control was given.
2818 These problems did NOT occur unless DomainKeys support was compiled.
2820 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2822 PH/24 Added ${if match_ip condition.
2824 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2825 databases so that it will be absolutely obvious if a crash occurs in the
2826 DB library. This is a regular occurrence (often caused by mis-matched
2829 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2830 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2831 picked up on a user's system that detects such things. There doesn't seem
2832 to be a gcc warning option for this - only an attribute that has to be
2833 put on the function's prototype. It seems that in Fedora Core 4 they have
2834 set this on a number of new functions. No doubt there will be more in due
2837 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2838 specify a transport. However, if an address that was verified by such a
2839 router was the subject of a callout, Exim crashed because it tried to
2840 read the rcpt_include_affixes from the non-existent transport. Now it
2841 just assumes that the setting of that option is false. This bug was
2842 introduced by 4.51/PH/31.
2844 PH/28 Changed -d+all to exclude +memory, because that information is very
2845 rarely of interest, but it makes the output a lot bigger. People tend to
2846 do -d+all out of habit.
2848 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2849 code in os-type was giving problems when libc.so lives in lib64, like on
2852 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2853 aren't the modern standard, and it seems that some systems' include files
2854 don't always have them. Exim was already checking for some of the newer
2855 ones like T_AAAA, and defining it itself. I've added checks for all the
2856 record types that Exim uses.
2858 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2859 not automatically generating a new one, as it is supposed to. This
2860 prevented TLS from working. If the file did exist, but contained invalid
2861 data, a new version was generated, as expected. It was only the case of a
2862 non-existent file that was broken.
2864 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2865 with a change in libdomainkeys > 0.64.
2867 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2868 from DNS. If the selector record carries the flag, it now has
2869 precedence over the domain-wide flag.
2871 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2873 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2874 the use of a port name that isn't defined in /etc/services) occurred, the
2875 message was deferred as in a normal delivery, and thus remained on the
2876 spool, instead of being failed because of the mua_wrapper setting. This
2877 is now fixed, and I tidied up some of the mua_wrapper messages at the
2880 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2881 the messages in a hash of arrays rather than using individual hashes.
2882 This is a bit cleaner and results in dramatic memory savings, albeit
2883 at a slight CPU cost.
2885 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2886 as requested by Marc Sherman.
2888 SC/10 Eximstats: added histograms for user specified patterns as requested
2891 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2893 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2894 fopen() in the content-scanning modules that did not already have it.
2900 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2901 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2903 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2905 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2907 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2908 to test Sieve filters that use "vacation".
2910 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2911 that changes the way the GnuTLS parameters are stored in the cache file.
2912 The new format can be generated externally. For backward compatibility,
2913 if the data in the cache doesn't make sense, Exim assumes it has read an
2914 old-format file, and it generates new data and writes a new file. This
2915 means that you can't go back to an older release without removing the
2918 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2919 work if there are any delivery delays because "one_time" forces the
2920 parent to be marked "delivered", so its unseen clone is never tried
2921 again. For this reason, Exim now forbids the simultaneous setting of
2924 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2925 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2926 entry if you want to know the details. The fix, however, neglected to
2927 consider the case when local delivery batching is involved. The test for
2928 "previously delivered" was not happening when checking to see if an
2929 address could be batched with a previous (undelivered) one; under
2930 certain circumstances this could lead to multiple deliveries to the same
2933 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2934 in its include files, and this causes problems building Exim.
2936 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2937 header_syntax) but Exim was just ignoring anything given after a slash.
2938 In particular, this caused confusion with an attempt to use "verify =
2939 reverse_host_lookup/defer_ok". An error is now given when options are
2940 supplied for verify items that do not have them. (Maybe reverse_host_
2941 lookup should have a defer_ok option, but that's a different point.)
2943 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2944 defined by RFC 821) to 2048, because there were problems with some AUTH
2945 commands, and RFC 1869 says the size should be increased for extended
2946 SMTP commands that take arguments.
2948 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2951 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2952 "unknown" error; now it says that the functionality isn't in the binary.
2954 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2955 an address' error message when a string expansion fails (syntax or
2956 whatever). Otherwise the password may appear in the log. Following change
2957 PH/42 below, there is no longer a chance of it appearing in a bounce
2960 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2962 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2963 of its addresses was ever tried. (Bugzilla bug #2.)
2965 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2966 the result incorrectly in the debug output. (It correctly added a newline
2967 to what was transported.)
2969 TF/01 Added $received_time.
2971 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2972 commented out examples of how to interface to a virus scanner and to
2973 SpamAssassin. Also added commented examples of av_scanner and
2974 spamd_address settings.
2976 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2977 and controls are allowed in which ACLs. There were a couple of minor
2978 errors. Some of the entries in the conditions table (which is a table of
2979 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2980 negation of where the condition IS allowed.
2982 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2984 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2985 header file does not have a version number, so I've had to invent a new
2986 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2987 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2988 radiusclient), but it was contributed by a Radius user.
2990 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2991 files or directories, for OpenSSL.
2993 PH/19 When an Exim process that is running as root has to create an Exim log
2994 file, it does so in a subprocess that runs as exim:exim so as to get the
2995 ownership right at creation (otherwise, other Exim processes might see
2996 the file with the wrong ownership). There was no test for failure of this
2997 fork() call, which would lead to the process getting stuck as it waited
2998 for a non-existent subprocess. Forks do occasionally fail when resources
2999 run out. I reviewed all the other calls to fork(); they all seem to check
3002 PH/20 When checking for unexpected SMTP input at connect time (before writing
3003 the banner), Exim was not dealing correctly with a non-positive return
3004 from the read() function. If the client had disconnected by this time,
3005 the result was a log entry for a synchronization error with an empty
3006 string after "input=" when read() returned zero. If read() returned -1
3007 (an event I could not check), uninitialized data bytes were printed.
3008 There were reports of junk text (parts of files, etc) appearing after
3011 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3013 PH/22 Added support for macro redefinition, and (re)definition in between
3014 driver and ACL definitions.
3016 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3017 forgetting to use the resulting value; it was using the unexpanded value.
3019 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3020 hadn't been configured. The fix is from Juergen Kreileder, who
3021 understands it better than I do:
3023 "Here's what I see happening with three configured cyrus_sasl
3024 authenticators configured (plain, login, cram-md5):
3026 On startup auth_cyrus_sasl_init() gets called for each of these.
3027 This means three calls to sasl_listmech() without a specified mech_list.
3028 => SASL tests which mechs of all available mechs actually work
3029 => three warnings about OTP not working
3030 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3032 With the patch, sasl_listmech() also gets called three times. But now
3033 SASL's mech_list option is set to the server_mech specified in the the
3034 authenticator. Or in other words, the answer from sasl_listmech()
3035 gets limited to just the mech you're testing for (which is different
3037 => the return list contains just 'plain' or 'login', 'cram-md5' or
3038 nothing depending on the value of ob->server_mech.
3040 I've just tested the patch: Authentication still works fine,
3041 unavailable mechs specified in the exim configuration are still
3042 caught, and the auth.log warnings about OTP are gone."
3044 PH/25 When debugging is enabled, the contents of the command line are added
3045 to the debugging output, even when log_selector=+arguments is not
3048 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3049 answer is "GNU", and only if the return is "GNU/something" is the answer
3052 PH/27 $acl_verify_message is now set immediately after the failure of a
3053 verification in an ACL, and so is available in subsequent modifiers. In
3054 particular, the message can be preserved by coding like this:
3056 warn !verify = sender
3057 set acl_m0 = $acl_verify_message
3059 Previously, $acl_verify_message was set only while expanding "message"
3060 and "log_message" when a very denied access.
3062 PH/28 Modified OS/os.c-Linux with
3064 -#ifndef OS_LOAD_AVERAGE
3065 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3067 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3068 nomenclature these days.)
3070 PH/29 Installed patch from the Sieve maintainer that adds the options
3071 sieve_useraddress and sieve_subaddress to the redirect router.
3073 PH/30 In these circumstances:
3074 . Two addresses routed to the same list of hosts;
3075 . First host does not offer TLS;
3076 . First host accepts first address;
3077 . First host gives temporary error to second address;
3078 . Second host offers TLS and a TLS session is established;
3079 . Second host accepts second address.
3080 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3081 and peerdn, if requested) that were in fact used only for the second
3084 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3085 attention to any local part prefix or suffix that was matched by the
3086 router that accepted the address. It now behaves in the same way as it
3087 does for delivery: the affixes are removed from the local part unless
3088 rcpt_include_affixes is set on the transport.
3090 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3091 timeout during the DATA phase of an incoming message.
3093 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3094 applied a patch sanctioned by the Sieve maintainer.
3096 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3097 the uid or gid is negative. A case of a negative gid caused this to be
3098 noticed. The fix allows for either to be negative.
3100 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3101 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3104 PH/36 The change PH/12 above was broken. Fixed it.
3106 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3107 the grounds that routing the same address twice would always produce the
3108 same answer. This might have been true once, but it is certainly no
3109 longer true now. Routing a child address may depend on the previous
3110 routing that produced that child. Some complicated redirection strategies
3111 went wrong when messages had multiple recipients, and made Exim's
3112 behaviour dependent on the order in which the addresses were given.
3114 I have moved the duplicate checking until after the routing is complete.
3115 Exim scans the addresses that are assigned to local and remote
3116 transports, and removes any duplicates. This means that more work will be
3117 done, as duplicates will always all be routed, but duplicates are
3118 presumably rare, so I don't expect this is of any significance.
3120 For deliveries to pipes, files, and autoreplies, the duplicate checking
3121 still happens during the routing process, since they are not going to be
3124 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3125 It corrects a timeout issue with spamd. This is Ian's comment: "The
3126 background is that sometimes spamd either never reads data from a
3127 connection it has accepted, or it never writes response data. The exiscan
3128 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3129 blindly assumes that writes won't block so it may never time out."
3131 PH/39 Allow G after quota size as well as K and M.
3133 PH/40 The value set for $authenticated_id in an authenticator may not contain
3134 binary zeroes or newlines because the value is written to log lines and
3135 to spool files. There was no check on this. Now the value is run through
3136 the string_printing() function so that such characters are converted to
3137 printable escape sequences.
3139 PH/41 $message_linecount is a new variable that contains the total number of
3140 lines in the message. Compare $body_linecount, which is the count for the
3143 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3144 bounce and delay warning messages, except in certain special cases, which
3147 (a) An SMTP error message from a remote host;
3148 (b) A message specified in a :fail: redirection;
3149 (c) A message specified in a "fail" command in a system filter;
3150 (d) A message specified in a FAIL return from the queryprogram router;
3151 (e) A message specified by the cannot_route_message router option.
3153 In these cases only, Exim does include the error details in bounce and
3154 warning messages. There are also a few cases where bland messages such
3155 as "unrouteable address" or "local delivery error" are given.
3157 PH/43 $value is now also set for the "else" part of a ${run expansion.
3159 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3160 being worked on, but at least Exim now implements the latest version to
3163 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3164 process to complete was treated as a delivery failure, a timeout while
3165 writing the message to the pipe was logged, but erroneously treated as a
3166 successful delivery. Such timeouts include transport filter timeouts. For
3167 consistency with the overall process timeout, these timeouts are now
3168 treated as errors, giving rise to delivery failures by default. However,
3169 there is now a new Boolean option for the pipe transport called
3170 timeout_defer, which, if set TRUE, converts the failures into defers for
3171 both kinds of timeout. A transport filter timeout is now identified in
3174 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3175 systems where "make" and "gmake" are different, calling "gmake" at top
3176 level broke things. I've arranged for the value of $(MAKE) to be passed
3177 from the Makefile to this script so that it can call the same version of
3181 A note about Exim versions 4.44 and 4.50
3182 ----------------------------------------
3184 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3185 changes of various kinds. As a consequence, a big documentation update was
3186 needed. This delayed the release for rather longer than seemed good, especially
3187 in the light of a couple of (minor) security issues. Therefore, the changes
3188 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3189 release. So 4.44 and 4.50 are in effect two different branches that both start
3192 I have left the 4.50 change log unchanged; it contains all the changes since
3193 4.43. The change log for 4.44 is below; many of its items are identical to
3194 those for 4.50. This seems to be the most sensible way to preserve the
3195 historical information.
3201 1. Minor wording change to the doc/README.SIEVE file.
3203 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3204 computation of the current number of files was incorrect.
3206 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3207 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3210 4. Give more explanation in the error message when the command for a transport
3211 filter fails to execute.
3213 5. There are several places where Exim runs a non-Exim command in a
3214 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3215 was being done only for the command run by the queryprogram router. It is
3216 now done for all such subprocesses. The other cases are: ${run, transport
3217 filters, and the commands run by the lmtp and pipe transports.
3219 6. Added CONFIGURE_GROUP build-time option.
3221 7. Some older OS have a limit of 256 on the maximum number of file
3222 descriptors. Exim was using setrlimit() to set 1000 as a large value
3223 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3224 systems. I've change it so that if it can't get 1000, it tries for 256.
3226 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3227 was an oversight, and furthermore, ever since the addition of extra
3228 controls (e.g. 4.43/32), the checks on when to allow different forms of
3229 "control" were broken. There should now be diagnostics for all cases when a
3230 control that does not make sense is encountered.
3232 9. Added the /retain_sender option to "control=submission".
3234 10. $recipients is now available in the predata ACL (oversight).
3236 11. Tidy the search cache before the fork to do a delivery from a message
3237 received from the command line. Otherwise the child will trigger a lookup
3238 failure and thereby defer the delivery if it tries to use (for example) a
3239 cached ldap connection that the parent has called unbind on.
3241 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3242 of $address_data from the recipient verification was clobbered by the
3243 sender verification.
3245 13. The value of address_data from a sender verification is now available in
3246 $sender_address_data in subsequent conditions in the ACL statement.
3248 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3250 15. Added a new option "connect=<time>" to callout options, to set a different
3253 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3254 was its contents. (It was OK if the option was not defined at all.)
3256 17. A "Completed" log line is now written for messages that are removed from
3257 the spool by the -Mrm option.
3259 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3260 information about exactly what failed.
3262 19. Added -dd to debug only the daemon process.
3264 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3265 handles timeouts, both on the server side and network timeouts. Renamed the
3266 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3268 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3269 It is now set to "smtps".
3271 22. $host_address is now set to the target address during the checking of
3272 ignore_target_hosts.
3274 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3275 being passed; this would have caused $sender_host_name to have been used if
3276 matching the list had actually called for a host name (not very likely,
3277 since this list is usually IP addresses). A host name is now passed as
3280 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3281 code that specifies a non-restarting handler (typically sigaction() in
3282 modern systems) in an attempt to fix a rare and obscure crash bug.
3284 25. Narrowed the window for a race in the daemon that could cause it to ignore
3285 SIGCHLD signals. This is not a major problem, because they are used only to
3286 wake it up if nothing else does.
3288 26. A malformed maildirsize file could cause Exim to calculate negative values
3289 for the mailbox size or file count. Odd effects could occur as a result.
3290 The maildirsize information is now recalculated if the size or filecount
3293 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3294 support for a long time. Removed HAVE_SYS_VFS_H.
3296 28. Installed the latest version of exipick from John Jetmore.
3298 29. In an address list, if the pattern was not a regular expression, an empty
3299 subject address (from a bounce message) matched only if the pattern was an
3300 empty string. Non-empty patterns were not even tested. This was the wrong
3301 because it is perfectly reasonable to use an empty address as part of a
3302 database query. An empty address is now tested by patterns that are
3303 lookups. However, all the other forms of pattern expect the subject to
3304 contain a local part and a domain, and therefore, for them, an empty
3305 address still always fails if the pattern is not itself empty.
3307 30. Exim went into a mad DNS loop when attempting to do a callout where the
3308 host was specified on an smtp transport, and looking it up yielded more
3309 than one IP address.
3311 31. Re-factored the code for checking spool and log partition space into a
3312 function that finds that data and another that does the check. The former
3313 is then used to implement four new variables: $spool_space, $log_space,
3314 $spool_inodes, and $log_inodes.
3316 32. The RFC2047 encoding function was originally intended for short strings
3317 such as real names; it was not keeping to the 75-character limit for
3318 encoded words that the RFC imposes. It now respects the limit, and
3319 generates multiple encoded words if necessary. To be on the safe side, I
3320 have increased the buffer size for the ${rfc2047: expansion operator from
3323 33. It is now permitted to omit both strings after an "if" condition; if the
3324 condition is true, the result is "true". As before, when the second string
3325 is omitted, a false condition yields an empty string. This makes it less
3326 cumbersome to write custom ACL and router conditions.
3328 34. Failure to deliver a bounce message always caused it to be frozen, even if
3329 there was an errors_to setting on the router. The errors_to setting is now
3332 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3333 canonical form (fully expanded) before being placed in
3334 $sender_host_address.
3336 36. The table in the code that translates DNS record types into text (T_A to
3337 "A" for instance) was missing entries for NS and CNAME. It is just possible
3338 that this could have caused confusion if both these types were looked up
3339 for the same domain, because the text type is used as part of Exim's
3340 per-process caching. But the chance of anyone hitting this buglet seems
3343 37. The dnsdb lookup has been extended in a number of ways.
3345 (1) There is a new type, "zns", which walks up the domain tree until it
3346 finds some nameserver records. It should be used with care.
3348 (2) There is a new type, "mxh", which is like "mx" except that it returns
3349 just the host names, not the priorities.
3351 (3) It is now possible to give a list of domains (or IP addresses) to be
3352 looked up. The behaviour when one of the lookups defers can be
3353 controlled by a keyword.
3355 (4) It is now possible to specify the separator character for use when
3356 multiple records are returned.
3358 38. The dnslists ACL condition has been extended: it is now possible to supply
3359 a list of IP addresses and/or domains to be looked up in a particular DNS
3362 39. Added log_selector=+queue_time_overall.
3364 40. When running the queue in the test harness, wait just a tad after forking a
3365 delivery process, to get repeatability of debugging output.
3367 41. Include certificate and key file names in error message when GnuTLS fails
3368 to set them up, because the GnuTLS error message doesn't include the name
3369 of the failing file when there is a problem reading it.
3371 42. Allow both -bf and -bF in the same test run.
3373 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3375 44. The "Exiscan patch" is now merged into the mainline Exim source.
3377 45. Sometimes the final signoff response after QUIT could fail to get
3378 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3379 < 0 before doing a fflush(). This bug looks as though it goes back to the
3380 introduction of TLS in release 3.20, but "sometimes" must have been rare
3381 because the tests only now provoked it.
3383 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3384 (this can affect the format of dates).
3386 47. exim_tidydb, when checking for the continued existence of a message for
3387 which it has found a message-specific retry record, was not finding
3388 messages that were in split spool directories. Consequently, it was
3389 deleting retry records that should have stayed in existence.
3391 48. Steve fixed some bugs in eximstats.
3393 49. The SPA authentication driver was not abandoning authentication and moving
3394 on to the next authenticator when an expansion was forced to fail,
3395 contradicting the general specification for all authenticators. Instead it
3396 was generating a temporary error. It now behaves as specified.
3398 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3399 (the order specifies the preference for clients). The order is now AES256,
3400 AES128, 3DES, ARCFOUR128.
3402 51. Small patch to Sieve code - explicitly set From: when generating an
3405 52. Exim crashed if a remote delivery caused a very long error message to be
3406 recorded - for instance if somebody sent an entire SpamAssassin report back
3407 as a large number of 550 error lines. This bug was coincidentally fixed by
3408 increasing the size of one of Exim's internal buffers (big_buffer) that
3409 happened as part of the Exiscan merge. However, to be on the safe side, I
3410 have made the code more robust (and fixed the comments that describe what
3413 53. Now that there can be additional text after "Completed" in log lines (if
3414 the queue_time_overall log selector is set), a one-byte patch to exigrep
3415 was needed to allow it to recognize "Completed" as not the last thing in
3418 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3419 patch that reportedly fixes this has been added. I am not expert enough to
3420 create a test for it. This is what the patch creator wrote:
3422 "I found a little strange behaviour of ldap code when working with
3423 Windows 2003 AD Domain, where users was placed in more than one
3424 Organization Units. When I tried to give exim partial DN, the exit code
3425 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3426 But simultaneously result of request was absolutely normal ldap result,
3427 so I produce this patch..."
3429 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3430 REFERENCE, so I have modified the code to exclude the patch when that macro
3433 55. Some experimental protocols are using DNS PTR records for new purposes. The
3434 keys for these records are domain names, not reversed IP addresses. The
3435 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3436 leaves it alone. Component reversal etc. now happens only for IP addresses.
3439 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3441 57. Double the size of the debug message buffer (to 2048) so that more of very
3442 long debug lines gets shown.
3444 58. The exicyclog utility now does better if the number of log files to keep
3445 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3447 59. Two changes related to the smtp_active_hostname option:
3449 (1) $smtp_active_hostname is now available as a variable.
3450 (2) The default for smtp_banner uses $smtp_active_hostname instead
3451 of $primary_hostname.
3453 60. The host_aton() function is supposed to be passed a string that is known
3454 to be a valid IP address. However, in the case of IPv6 addresses, it was
3455 not checking this. This is a hostage to fortune. Exim now panics and dies
3456 if the condition is not met. A case was found where this could be provoked
3457 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3458 components; fortuitously, this particular loophole had already been fixed
3459 by change 4.50/55 above.
3461 If there are any other similar loopholes, the new check in host_aton()
3462 itself should stop them being exploited. The report I received stated that
3463 data on the command line could provoke the exploit when Exim was running as
3464 exim, but did not say which command line option was involved. All I could
3465 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3466 running as the user.
3469 61. There was a buffer overflow vulnerability in the SPA authentication code
3470 (which came originally from the Samba project). I have added a test to the
3471 spa_base64_to_bits() function which I hope fixes it.
3474 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3475 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3477 63. The daemon start-up calls getloadavg() while still root for those OS that
3478 need the first call to be done as root, but it missed one case: when
3479 deliver_queue_load_max is set with deliver_drop_privilege. This is
3480 necessary for the benefit of the queue runner, because there is no re-exec
3481 when deliver_drop_privilege is set.
3483 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3484 This has been fixed.
3486 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3487 was in use, was not putting the data itself into the right store pool;
3488 consequently, it could be overwritten for a subsequent message in the same
3489 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3492 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3494 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3495 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3496 the function were treating the return as a boolean value, which happened to
3497 work because 0=false and not-0=true, but is not correct code.
3499 68. The host_aton() function was not handling scoped IPv6 addresses (those
3500 with, for example, "%eth0" on the end) correctly.
3502 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3503 negated items (that is, ~something) in unsigned ints. Some compilers
3504 apparently mutter when there is no cast.
3506 70. If an address verification called from an ACL failed, and did not produce a
3507 user-specific message (i.e. there was only a "system" message), nothing was
3508 put in $acl_verify_message. In this situation, it now puts the system
3511 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3512 session; change 4.31/43 added the unwanted input to the log line - except
3513 that it did not do this in the start of session case. It now does.
3515 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3516 This is wrong and can cause the other end to generate a synchronization
3517 error if it is another Exim or anything else that does the synchronization
3518 check. A QUIT command is no longer sent after a timeout.
3520 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3521 during host lookups.
3523 74. The defer_ok option of callout verification was not working if it was used
3524 when verifying addresses in header lines, that is, for this case:
3526 verify = header_sender/callout=defer_ok
3528 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3529 those file descriptors could be used for SMTP connections. If anything
3530 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3531 could be sent to the SMTP client, causing chaos. The daemon now opens
3532 stdin, stdout, and stderr to /dev/null when it puts itself into the
3535 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3536 log by default. The user can override this with suitable Perl magic.
3538 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3539 the log message when discard triggers, was not working for the DATA ACL or
3540 for the non-SMTP ACL.
3542 78. Error message wording change in sieve.c.
3544 79. If smtp_accept_max_per_host was set, the number of connections could be
3545 restricted to fewer than expected, because the daemon was trying to set up
3546 a new connection before checking whether the processes handling previous
3547 connections had finished. The check for completed processes is now done
3548 earlier. On busy systems, this bug wouldn't be noticed because something
3549 else would have woken the daemon, and it would have reaped the completed
3552 80. If a message was submitted locally by a user whose login name contained one
3553 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3554 It caused a spool format error. I have fixed the spool reading code. A
3555 related problem was that the "from" clause in the Received: line became
3556 illegal because of the space(s). It is now covered by ${quote_local_part.
3558 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3561 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3563 83. Patch from Sieve maintainer to fix unterminated string problem in
3564 "vacation" handling.
3566 84. Some minor changes to the Linux configuration files to help with other
3567 OS variants using glibc.
3569 85. One more patch for Sieve to update vacation handling to latest spec.
3572 ----------------------------------------------------
3573 See the note above about the 4.44 and 4.50 releases.
3574 ----------------------------------------------------
3580 1. Change 4.43/35 introduced a bug that caused file counts to be
3581 incorrectly computed when quota_filecount was set in an appendfile
3584 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3585 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3588 3. Give more explanation in the error message when the command for a transport
3589 filter fails to execute.
3591 4. There are several places where Exim runs a non-Exim command in a
3592 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3593 was being done only for the command run by the queryprogram router. It is
3594 now done for all such subprocesses. The other cases are: ${run, transport
3595 filters, and the commands run by the lmtp and pipe transports.
3597 5. Some older OS have a limit of 256 on the maximum number of file
3598 descriptors. Exim was using setrlimit() to set 1000 as a large value
3599 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3600 systems. I've change it so that if it can't get 1000, it tries for 256.
3602 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3603 was an oversight, and furthermore, ever since the addition of extra
3604 controls (e.g. 4.43/32), the checks on when to allow different forms of
3605 "control" were broken. There should now be diagnostics for all cases when a
3606 control that does not make sense is encountered.
3608 7. $recipients is now available in the predata ACL (oversight).
3610 8. Tidy the search cache before the fork to do a delivery from a message
3611 received from the command line. Otherwise the child will trigger a lookup
3612 failure and thereby defer the delivery if it tries to use (for example) a
3613 cached ldap connection that the parent has called unbind on.
3615 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3616 of $address_data from the recipient verification was clobbered by the
3617 sender verification.
3619 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3620 was its contents. (It was OK if the option was not defined at all.)
3622 11. A "Completed" log line is now written for messages that are removed from
3623 the spool by the -Mrm option.
3625 12. $host_address is now set to the target address during the checking of
3626 ignore_target_hosts.
3628 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3629 being passed; this would have caused $sender_host_name to have been used if
3630 matching the list had actually called for a host name (not very likely,
3631 since this list is usually IP addresses). A host name is now passed as
3634 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3635 code that specifies a non-restarting handler (typically sigaction() in
3636 modern systems) in an attempt to fix a rare and obscure crash bug.
3638 15. Narrowed the window for a race in the daemon that could cause it to ignore
3639 SIGCHLD signals. This is not a major problem, because they are used only to
3640 wake it up if nothing else does.
3642 16. A malformed maildirsize file could cause Exim to calculate negative values
3643 for the mailbox size or file count. Odd effects could occur as a result.
3644 The maildirsize information is now recalculated if the size or filecount
3647 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3648 support for a long time. Removed HAVE_SYS_VFS_H.
3650 18. Updated exipick to current release from John Jetmore.
3652 19. Allow an empty sender to be matched against a lookup in an address list.
3653 Previously the only cases considered were a regular expression, or an
3656 20. Exim went into a mad DNS lookup loop when doing a callout where the
3657 host was specified on the transport, if the DNS lookup yielded more than
3660 21. The RFC2047 encoding function was originally intended for short strings
3661 such as real names; it was not keeping to the 75-character limit for
3662 encoded words that the RFC imposes. It now respects the limit, and
3663 generates multiple encoded words if necessary. To be on the safe side, I
3664 have increased the buffer size for the ${rfc2047: expansion operator from
3667 22. Failure to deliver a bounce message always caused it to be frozen, even if
3668 there was an errors_to setting on the router. The errors_to setting is now
3671 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3672 canonical form (fully expanded) before being placed in
3673 $sender_host_address.
3675 24. Updated eximstats to version 1.33
3677 25. Include certificate and key file names in error message when GnuTLS fails
3678 to set them up, because the GnuTLS error message doesn't include the name
3679 of the failing file when there is a problem reading it.
3681 26. Expand error message when OpenSSL has problems setting up cert/key files.
3684 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3685 (this can affect the format of dates).
3687 28. exim_tidydb, when checking for the continued existence of a message for
3688 which it has found a message-specific retry record, was not finding
3689 messages that were in split spool directories. Consequently, it was
3690 deleting retry records that should have stayed in existence.
3692 29. eximstats updated to version 1.35
3693 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3694 1.35 - bugfix such that pie charts by volume are generated correctly
3696 30. The SPA authentication driver was not abandoning authentication and moving
3697 on to the next authenticator when an expansion was forced to fail,
3698 contradicting the general specification for all authenticators. Instead it
3699 was generating a temporary error. It now behaves as specified.
3701 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3702 (the order specifies the preference for clients). The order is now AES256,
3703 AES128, 3DES, ARCFOUR128.
3705 31. Small patch to Sieve code - explicitly set From: when generating an
3708 32. Exim crashed if a remote delivery caused a very long error message to be
3709 recorded - for instance if somebody sent an entire SpamAssassin report back
3710 as a large number of 550 error lines. This bug was coincidentally fixed by
3711 increasing the size of one of Exim's internal buffers (big_buffer) that
3712 happened as part of the Exiscan merge. However, to be on the safe side, I
3713 have made the code more robust (and fixed the comments that describe what
3716 33. Some experimental protocols are using DNS PTR records for new purposes. The
3717 keys for these records are domain names, not reversed IP addresses. The
3718 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3719 leaves it alone. Component reversal etc. now happens only for IP addresses.
3722 34. The host_aton() function is supposed to be passed a string that is known
3723 to be a valid IP address. However, in the case of IPv6 addresses, it was
3724 not checking this. This is a hostage to fortune. Exim now panics and dies
3725 if the condition is not met. A case was found where this could be provoked
3726 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3727 components; fortuitously, this particular loophole had already been fixed
3728 by change 4.50/55 or 4.44/33 above.
3730 If there are any other similar loopholes, the new check in host_aton()
3731 itself should stop them being exploited. The report I received stated that
3732 data on the command line could provoke the exploit when Exim was running as
3733 exim, but did not say which command line option was involved. All I could
3734 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3735 running as the user.
3738 35. There was a buffer overflow vulnerability in the SPA authentication code
3739 (which came originally from the Samba project). I have added a test to the
3740 spa_base64_to_bits() function which I hope fixes it.
3743 36. The daemon start-up calls getloadavg() while still root for those OS that
3744 need the first call to be done as root, but it missed one case: when
3745 deliver_queue_load_max is set with deliver_drop_privilege. This is
3746 necessary for the benefit of the queue runner, because there is no re-exec
3747 when deliver_drop_privilege is set.
3749 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3750 was in use, was not putting the data itself into the right store pool;
3751 consequently, it could be overwritten for a subsequent message in the same
3752 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3755 38. Sometimes the final signoff response after QUIT could fail to get
3756 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3757 < 0 before doing a fflush(). This bug looks as though it goes back to the
3758 introduction of TLS in release 3.20, but "sometimes" must have been rare
3759 because the tests only now provoked it.
3765 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3766 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3767 Now it returns an integer. A number of calls were still expecting a T/F
3768 return. Fortuitously, in all cases, the tests worked in OK situations,
3769 which is the norm. However, things would have gone wrong on any write
3770 failures on the smtp file descriptor. This function is used when sending
3771 messages over SMTP and also when doing verify callouts.
3773 2. When Exim is called to do synchronous delivery of a locally submitted
3774 message (the -odf or -odi options), it no longer closes stderr before doing
3777 3. Implemented the mua_wrapper option.
3779 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3781 5. Implemented the functions header_remove(), header_testname(),
3782 header_add_at_position(), and receive_remove_recipient(), and exported them
3785 6. If an ACL "warn" statement specified the addition of headers, Exim already
3786 inserted X-ACL-Warn: at the start if there was no header name. However, it
3787 was not making this test for the second and subsequent header lines if
3788 there were newlines in the string. This meant that an invalid header could
3789 be inserted if Exim was badly configured.
3791 7. Allow an ACL "warn" statement to add header lines at the start or after all
3792 the Received: headers, as well as at the end.
3794 8. Added the rcpt_4xx retry error code.
3796 9. Added postmaster_mailfrom=xxx to callout verification option.
3798 10. Added mailfrom=xxxx to the callout verification option, for verify=
3801 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3802 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3804 12. Inserted some casts to stop certain compilers warning when using pointer
3805 differences as field lengths or precisions in printf-type calls (mostly
3806 affecting debugging statements).
3808 13. Added optional readline() support for -be (dynamically loaded).
3810 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3811 same clock tick as a message's arrival, so that its received time was the
3812 same as the "first fail" time on the retry record, and that message
3813 remained on the queue past the ultimate address timeout, every queue runner
3814 would try a delivery (because it was past the ultimate address timeout) but
3815 after another failure, the ultimate address timeout, which should have then
3816 bounced the address, did not kick in. This was a "< instead of <=" error;
3817 in most cases the first failure would have been in the next clock tick
3818 after the received time, and all would be well.
3820 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3821 being recognized when the domain list was tested by the match_domain
3822 condition in an expansion string.
3824 16. Added the ${str2b64: operator.
3826 17. Exim was always calling setrlimit() to set a large limit for the number of
3827 processes, without checking whether the existing limit was already
3828 adequate. (It did check for the limit on file descriptors.) Furthermore,
3829 errors from getrlimit() and setrlimit() were being ignored. Now they are
3830 logged to the main and panic logs, but Exim does carry on, to try to do its
3831 job under whatever limits there are.
3833 18. Imported PCRE 5.0.
3835 19. Trivial typo in log message " temporarily refused connection" (the leading
3838 20. If the log selector return_path_on_delivery was set and an address was
3839 redirected to /dev/null, the delivery process crashed because it assumed
3840 that a return path would always be set for a "successful" delivery. In this
3841 case, the whole delivery is bypassed as an optimization, and therefore no
3844 21. Internal re-arrangement: the function for sending a challenge and reading
3845 a response while authentication was assuming a zero-terminated challenge
3846 string. It's now changed to take a pointer and a length, to allow for
3847 binary data in such strings.
3849 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3851 23. Exim was not respecting finduser_retries when seeking the login of the
3852 uid under which it was called; it was always trying 10 times. (The default
3853 setting of finduser_retries is zero.) Also, it was sleeping after the final
3854 failure, which is pointless.
3856 24. Implemented tls_on_connect_ports.
3858 25. Implemented acl_smtp_predata.
3860 26. If the domain in control=submission is set empty, Exim assumes that the
3861 authenticated id is a complete email address when it generates From: or
3862 Sender: header lines.
3864 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3865 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3866 chown and chgrp in /bin and hostname in /usr/bin.
3868 28. Exim was keeping the "process log" file open after each use, just as it
3869 does for the main log. This opens the possibility of it remaining open for
3870 long periods when the USR1 signal hits a daemon. Occasional processlog
3871 errors were reported, that could have been caused by this. Anyway, it seems
3872 much more sensible not to leave this file open at all, so that is what now
3875 29. The long-running daemon process does not normally write to the log once it
3876 has entered its main loop, and it closes the log before doing so. This is
3877 so that log files can straightforwardly be renamed and moved. However,
3878 there are a couple of unusual error situations where the daemon does write
3879 log entries, and I had neglected to close the log afterwards.
3881 30. The text of an SMTP error response that was received during a remote
3882 delivery was being truncated at 512 bytes. This is too short for some of
3883 the long messages that one sometimes sees. I've increased the limit to
3886 31. It is now possible to make retry rules that apply only when a message has a
3887 specific sender, in particular, an empty sender.
3889 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3890 it possible to be selective about when SMTP synchronization is enforced.
3892 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3894 32. Implemented hosts_connection_nolog.
3896 33. Added an ACL for QUIT.
3898 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3901 35. Added mailbox_size and mailbox_filecount to appendfile.
3903 36. Added control = no_multiline_responses to ACLs.
3905 37. There was a bug in the logic of the code that waits for the clock to tick
3906 in the case where the clock went backwards by a substantial amount such
3907 that the microsecond fraction of "now" was more than the microsecond
3908 fraction of "then" (but the whole seconds number was less).
3910 38. Added support for the libradius Radius client library this is found on
3911 FreeBSD (previously only the radiusclient library was supported).
3917 1. When certain lookups returned multiple values in the form name=value, the
3918 quoting of the values was not always being done properly. Specifically:
3919 (a) If the value started with a double quote, but contained no whitespace,
3921 (b) If the value contained whitespace other than a space character (i.e.
3922 tabs or newlines or carriage returns) it was not quoted.
3923 This fix has been applied to the mysql and pgsql lookups by writing a
3924 separate quoting function and calling it from the lookup code. The fix
3925 should probably also be applied to nisplus, ibase and oracle lookups, but
3926 since I cannot test any of those, I have not disturbed their existing code.
3928 2. A hit in the callout cache for a specific address caused a log line with no
3929 reason for rejecting RCPT. Now it says "Previous (cached) callout
3930 verification failure".
3932 3. There was an off-by-one bug in the queryprogram router. An over-long
3933 return line was truncated at 256 instead of 255 characters, thereby
3934 overflowing its buffer with the terminating zero. As well as fixing this, I
3935 have increased the buffer size to 1024 (and made a note to document this).
3937 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3938 when Exim is waiting for an SMTP response from a remote server, Exim
3939 restarts its select() call on the socket, thereby resetting its timeout.
3940 This is not a problem when such interrupts are rare. Somebody set up a cron
3941 job to run exiwhat every 2 minutes, which is less than the normal select()
3942 timeout (5 or 10 minutes). This meant that the select() timeout never
3943 kicked in because it was always reset. I have fixed this by comparing the
3944 time when an interrupt arrives with the time at the start of the first call
3945 to select(). If more time than the timeout has elapsed, the interrupt is
3946 treated as a timeout.
3948 5. Some internal re-factoring in preparation for the addition of Sieve
3949 extensions (by MH). In particular, the "personal" test is moved to a
3950 separate function, and given an option for scanning Cc: and Bcc: (which is
3951 not set for Exim filters).
3953 6. When Exim created an email address using the login of the caller as the
3954 local part (e.g. when creating a From: or Sender: header line), it was not
3955 quoting the local part when it contained special characters such as @.
3957 7. Installed new OpenBSD configuration files.
3959 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3960 try to make them clearer.
3962 9. Callout options, other than the timeout value, were being ignored when
3963 verifying sender addresses in header lines. For example, when using
3965 verify = header_sender/callout=no_cache
3967 the cache was (incorrectly) being used.
3969 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3970 only the Cygwin environment.
3972 11. When return_path_on_delivery was set as a log selector, if different remote
3973 addresses in the same message used different return paths and parallel
3974 remote delivery occurred, the wrong values would sometimes be logged.
3975 (Whenever a remote delivery process finished, the return path value from
3976 the most recently started remote delivery process was logged.)
3978 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3979 lines when AUTH and/or TLS are in use. This is the "received protocol"
3980 field. Exim used to use "asmtp" for authenticated SMTP, without any
3981 indication (in the protocol name) for TLS use. Now it follows the RFC and
3982 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3983 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3984 names appear in log lines as well as in Received: header lines.
3986 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3987 extensions, and comparison tests, and to fix some bugs.
3989 14. Changes to the "personal" filter test:
3991 (1) The test was buggy in that it was just doing the equivalent of
3992 "contains" tests on header lines. For example, if a user's address was
3993 anne@some.where, the "personal" test would incorrectly be true for
3995 To: susanne@some.where
3997 This test is now done by extracting each address from the header in turn,
3998 and checking the entire address. Other tests that are part of "personal"
3999 are now done using regular expressions (for example, to check local parts
4000 of addresses in From: header lines).
4002 (2) The list of non-personal local parts in From: addresses has been
4003 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4004 taken from the Sieve specification recommendations.
4006 (3) If the message contains any header line starting with "List-" it is
4007 treated as non-personal.
4009 (4) The test for "circular" in the Subject: header line has been removed
4010 because it now seems ill-conceived.
4012 15. Minor typos in src/EDITME comments corrected.
4014 16. Installed latest exipick from John Jetmore.
4016 17. If headers_add on a router specified a text string that was too long for
4017 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4018 of string_sprintf() is now avoided.
4020 18. $message_body_size was not set (it was always zero) when running the DATA
4021 ACL and the local_scan() function.
4023 19. For the "mail" command in an Exim filter, no default was being set for
4024 the once_repeat time, causing a random time value to be used if "once" was
4025 specified. (If the value happened to be <= 0, no repeat happened.) The
4026 default is now 0s, meaning "never repeat". The "vacation" command was OK
4027 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4028 (I found it when inspecting the code).
4030 20. There is now an overall timeout for performing a callout verification. It
4031 defaults to 4 times the callout timeout, which applies to individual SMTP
4032 commands during the callout. The overall timeout applies when there is more
4033 than one host that can be tried. The timeout is checked before trying the
4034 next host. This prevents very long delays if there are a large number of
4035 hosts and all are timing out (e.g. when the network connections are timing
4036 out). The value of the overall timeout can be changed by specifying an
4037 additional sub-option for "callout", called "maxwait". For example:
4039 verify = sender/callout=5s,maxwait=20s
4041 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4042 to the end before writing, but this should make it even safer).
4044 22. Exim was forgetting that it had advertised PIPELINING for the second and
4045 subsequent messages on an SMTP connection. It was also not resetting its
4046 memory on STARTTLS and an internal HELO.
4048 23. When Exim logs an SMTP synchronization error within a session, it now
4049 records whether PIPELINING has been advertised or not.
4051 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4052 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4053 rather than long int.
4055 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4057 26. Added the never_mail option to autoreply.
4063 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4064 crash if the getsockname() call failed; this can happen if a connection is
4065 closed very soon after it is established. The problem was simply in the
4066 order in which certain operations were done, causing Exim to try to write
4067 to the SMTP stream before it had set up the file descriptor. The bug has
4068 been fixed by making things happen in the correct order.
4074 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4075 before the connection was closed, thus losing the rejection response.
4077 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4078 some early Solaris releases, but causes trouble in current releases where
4079 socklen_t is defined.
4081 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4084 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4087 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4088 that releasing the top of it at the end releases what was used for sub-
4089 expansions (unless the block got too big). However, discard this block if
4090 the first thing is a variable or header, so that we can use its block when
4091 it is dynamic (useful for very large $message_headers, for example).
4093 6. Lookups now cache *every* query, not just the most recent. A new, separate
4094 store pool is used for this. It can be recovered when all lookup caches are
4095 flushed. Lookups now release memory at the end of their result strings.
4096 This has involved some general refactoring of the lookup sources.
4098 7. Some code has been added to the store_xxx() functions to reduce the amount
4099 of flapping under certain conditions.
4101 8. log_incoming_interface used to affect only the <= reception log lines. Now
4102 it causes the local interface and port to be added to several more SMTP log
4103 lines, for example "SMTP connection from", and rejection lines.
4105 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4107 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4109 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4110 could be overwritten at the end of the current message (or the start of a
4111 new message if it was set in a HELO ACL). The value is now preserved for
4112 the duration of the SMTP connection.
4114 12. If a transport had a headers_rewrite setting, and a matching header line
4115 contained an unqualified address, that address was qualified, even if it
4116 did not match any rewriting rules. The underlying bug was that the values
4117 of the flags that permit the existence of unqualified sender and recipient
4118 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4119 non-local messages, and by -bnq for local messages) were not being
4120 preserved with the message after it was received.
4122 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4123 "next input=" as part of the text comprising the host identity instead of
4124 the correct text. The code was using the same buffer for two different
4125 strings. However, depending on which order the printing function evaluated
4126 its arguments, the bug did not always show up. Under Linux, for example, my
4127 test suite worked just fine.
4129 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4130 doesn't work with some older versions of Perl. It has been changed to "my",
4131 which in any case is probably the better facility to use.
4133 15. A really picky compiler found some instances of statements for creating
4134 error messages that either had too many or two few arguments for the format
4137 16. The size of the buffer for calls to the DNS resolver has been increased
4138 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4139 for addresses that have a lot of PTR records. This alleviates a problem; it
4140 does not fully solve it.
4142 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4143 buffer now truncates the list and logs the incident, which is the same
4144 action as happens when Exim is looking up a host name and its aliases.
4145 Previously in this situation something unpredictable would happen;
4146 sometimes it was "internal error: store_reset failed".
4148 18. If a server dropped the connection unexpectedly when an Exim client was
4149 using GnuTLS and trying to read a response, the client delivery process
4150 crashed while trying to generate an error log message.
4152 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4153 string, for example:
4155 warn message = H1: something\nH2: something
4157 the text was added as a single header line from Exim's point of view
4158 though it ended up OK in the delivered message. However, searching for the
4159 second and subsequent header lines using $h_h2: did not work. This has been
4160 fixed. Similarly, if a system filter added multiple headers in this way,
4161 the routers could not see them.
4163 20. Expanded the error message when iplsearch is called with an invalid key to
4164 suggest using net-iplsearch in a host list.
4166 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4167 ACLs are no longer actually imposed (and a message to that effect is
4170 22. If a "gecos" field in a passwd entry contained escaped characters, in
4171 particular, if it contained a \" sequence, Exim got it wrong when building
4172 a From: or a Sender: header from that name. A second bug also caused
4173 incorrect handling when an unquoted " was present following a character
4174 that needed quoting.
4176 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4177 was not being matched caselessly.
4179 24. Arranged for all hyphens in the exim.8 source to be escaped with
4182 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4183 properly. Recipient callout cache records were still being keyed to include
4184 the sender, even when use_sender was set false. This led to far more
4185 callouts that were necessary. The sender is no longer included in the key
4186 when use_sender is false.
4188 26. Added "control = submission" modifier to ACLs.
4190 27. Added the ${base62d: operator to decode base 62 numbers.
4192 28. dnsdb lookups can now access SRV records.
4194 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4195 the configuration file.
4197 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4198 (-v) mode. This makes the output for a verbose queue run more intelligible.
4200 31. Added a use_postmaster feature to recipient callouts.
4202 32. Added the $body_zerocount variable, containing the number of binary zero
4203 bytes in the message body.
4205 33. The time of last modification of the "new" subdirectory is now used as the
4206 "mailbox time last read" when there is a quota error for a maildir
4209 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4211 35. Added +ignore_unknown as a special item in host lists.
4213 36. Code for decoding IPv6 addresses in host lists is now included, even if
4214 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4215 address was recognized as an IP address, but was then not correctly decoded
4216 into binary, causing unexpected and incorrect effects when compared with
4223 1. Very minor rewording of debugging text in manualroute to say "list of
4224 hosts" instead of "hostlist".
4226 2. If verify=header_syntax was set, and a header line with an unqualified
4227 address (no domain) and a large number of spaces between the end of the
4228 name and the colon was received, the reception process suffered a buffer
4229 overflow, and (when I tested it) crashed. This was caused by some obsolete
4230 code that should have been removed. The fix is to remove it!
4232 3. When running in the test harness, delay a bit after writing a bounce
4233 message to get a bit more predictability in the log output.
4235 4. Added a call to search_tidyup() just before forking a reception process. In
4236 theory, someone could use a lookup in the expansion of smtp_accept_max_
4237 per_host which, without the tidyup, could leave open a database connection.
4239 5. Added the variables $recipient_data and $sender_data which get set from a
4240 lookup success in an ACL "recipients" or "senders" condition, or a router
4241 "senders" option, similar to $domain_data and $local_part_data.
4243 6. Moved the writing of debug_print from before to after the "senders" test
4246 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4247 problems for message scanning, either using a data ACL, or using
4248 local_scan() because the Received: header was not generated till after they
4249 were called (in order to set the time as the time of reception completion).
4250 I have revised the way this works. The header is now generated after the
4251 body is received, but before the ACL or local_scan() are called. After they
4252 are run, the timestamp in the header is updated.
4258 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4259 before starting a queue runner without re-exec. This happened only when
4260 deliver_drop_privilege was set or when the Exim user was set to root. The
4261 effect of the bug was that timeouts during subsequent deliveries caused
4262 crashes instead of being properly handled. The handler is now left at its
4263 default (and expected) setting.
4265 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4266 message, again when deliver_drop_privilege is set or Exim is run as root.
4267 The bug described in (1) was not present in this case, but the tidying up
4268 of the other signals was missing. I have made the two cases consistent.
4270 3. The ignore_target_hosts setting on a manualroute router was being ignored
4271 for hosts that were looked up using the /MX notation.
4273 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4276 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4277 operated on the sender address. After changing the $sender_address to <>
4278 for the sender address verify, Exim was re-instated it as the original
4279 (before rewriting) address, but remembering that it had rewritten it, so it
4280 wasn't rewriting it again. This bug also had the effect of breaking the
4281 sender address verification caching when the sender address was rewritten.
4283 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4284 This has been changed so that if the ip literal address matches
4285 ignore_target_hosts, the router declines.
4287 7. Added expansion conditions match_domain, match_address, and match_local_
4288 part (NOT match_host).
4290 8. The placeholder for the Received: header didn't have a length field set.
4292 9. Added code to Exim itself and to exim_lock to test for a specific race
4293 condition that could lead to file corruption when using MBX delivery. The
4294 issue is with the lockfile that is created in /tmp. If this file is removed
4295 after a process has opened it but before that process has acquired a lock,
4296 there is the potential for a second process to recreate the file and also
4297 acquire a lock. This could lead to two Exim processes writing to the file
4298 at the same time. The added code performs the same test as UW imapd; it
4299 checks after acquiring the lock that its file descriptor still refers to
4300 the same named file.
4302 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4303 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4306 11. Added the smtp_active_hostname option. If used, this will typically be made
4307 to depend on the incoming interface address. Because $interface_address is
4308 not set up until the daemon has forked a reception process, error responses
4309 that can happen earlier (such as "too many connections") no longer contain
4312 12. If an expansion in a condition on a "warn" statement fails because a lookup
4313 defers, the "warn" statement is abandoned, and the next ACL statement is
4314 processed. Previously this caused the whole ACL to be aborted.
4316 13. Added the iplsearch lookup type.
4318 14. Added ident_timeout as a log selector.
4320 15. Added tls_certificate_verified as a log selector.
4322 16. Added a global option tls_require_ciphers (compare the smtp transport
4323 option of the same name). This controls incoming TLS connections.
4325 17. I finally figured out how to make tls_require_ciphers do a similar thing
4326 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4327 before starting the TLS session.
4329 18. Tabs are now shown as \t in -bP output.
4331 19. If the log selector return_path_on_delivery was set, Exim crashed when
4332 bouncing a message because it had too many Received: header lines.
4334 20. If two routers both had headers_remove settings, and the first one included
4335 a superfluous trailing colon, the final name in the first list and the
4336 first name in the second list were incorrectly joined into one item (with a
4337 colon in the middle).
4343 1. Added -C and -D options to the exinext utility, mainly to make it easier
4344 to include in the automated testing, but these could be helpful when
4345 multiple configurations are in use.
4347 2. The exinext utility was not formatting the output nicely when there was
4348 an alternate port involved in the retry record key, nor when there was a
4349 message id as well (for retries that were specific to a specific message
4350 and a specific host). It was also confused by IPv6 addresses, because of
4351 the additional colons they contain. I have fixed the IPv4 problem, and
4352 patched it up to do a reasonable job for IPv6.
4354 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4355 delivery, the log line now contains "pipelined" if PIPELINING was used.
4357 4. An SMTP transport process used to panic and die if the bind() call to set
4358 an explicit outgoing interface failed. This has been changed; it is now
4359 treated in the same way as a connect() failure.
4361 5. A reference to $sender_host_name in the part of a conditional expansion
4362 that was being skipped was still causing a DNS lookup. This no longer
4365 6. The def: expansion condition was not recognizing references to header lines
4366 that used bh_ and bheader_.
4368 7. Added the _cache feature to named lists.
4370 8. The code for checking quota_filecount in the appendfile transport was
4371 allowing one more file than it should have been.
4373 9. For compatibility with Sendmail, the command line option
4381 and sets the incoming protocol and host name (for trusted callers). The
4382 host name and its colon can be omitted when only the protocol is to be set.
4383 Note the Exim already has two private options, -pd and -ps, that refer to
4384 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4385 "s", but I don't think that's a major issue.
4387 10. A number of refactoring changes to the code, none of which should affect
4390 (a) The number of logging options was getting close to filling up the
4391 32-bit word that was used as a bit map. I have split them into two classes:
4392 those that are passed in the argument to log_write(), and those that are
4393 only ever tested independently outside of that function. These are now in
4394 separate 32-bit words, so there is plenty of room for expansion again.
4395 There is no change in the user interface or the logging behaviour.
4397 (b) When building, for example, log lines, the code previously used a
4398 macro that called string_cat() twice, in order to add two strings. This is
4399 not really sufficiently general. Furthermore, there was one instance where
4400 it was actually wrong because one of the argument was used twice, and in
4401 one call a function was used. (As it happened, calling the function twice
4402 did not affect the overall behaviour.) The macro has been replaced by a
4403 function that can join an arbitrary number of extra strings onto a growing
4406 (c) The code for expansion conditions now uses a table and a binary chop
4407 instead of a serial search (which was left over from when there were very
4408 few conditions). Also, it now recognizes conditions like "pam" even when
4409 the relevant support is not compiled in: a suitably worded error message is
4410 given if an attempt is made to use such a condition.
4412 11. Added ${time_interval:xxxxx}.
4414 12. A bug was causing one of the ddress fields not to be passed back correctly
4415 from remote delivery subprocesses. The field in question was not being
4416 subsequently used, so this caused to problems in practice.
4418 13. Added new log selectors queue_time and deliver_time.
4420 14. Might have fixed a bug in maildirsizefile handling that threw up
4421 "unexpected character" debug warnings, and recalculated the data
4422 unnecessarily. In any case, I expanded the warning message to give more
4425 15. Added the message "Restricted characters in address" to the statements in
4426 the default ACL that block characters like @ and % in local parts.
4428 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4429 Three changes have been made:
4431 (a) There was a serious bug; a negative response to MAIL caused the whole
4432 recipient domain to be cached as invalid, thereby blocking all messages
4433 to all local parts at the same domain, from all senders. This bug has
4434 been fixed. The domain is no longer cached after a negative response to
4435 MAIL if the sender used is not empty.
4437 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4440 (c) A new callout option, "use_sender" has been added for people who want
4441 the modified behaviour.
4447 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4450 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4451 indeed breaks things for older releases.
4453 3. Added additional logging to the case where there is a problem reading data
4454 from a filter that is running in a subprocess using a pipe, in order to
4455 try to track down a specific problem.
4457 4. Testing facility fudge: when running in the test harness and attempting
4458 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4459 getting "No route to host". Convert this to a timeout.
4461 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4464 6. Some OS don't have socklen_t but use size_t instead. This affects the
4465 fifth argument of getsockopt() amongst other things. This is now
4466 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4467 can be set for individual OS. I have set it for SunOS5, OSF1, and
4468 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4469 some earlier ones do not.
4471 7. Change 4.30/15 was not doing the test caselessly.
4473 8. The standard form for an IPv6 address literal was being rejected by address
4474 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4475 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4476 this, as well as the form without the "IPv6" on the front (but only when
4477 address literals are enabled, of course).
4479 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4481 10. Exim crashed if a message with an empty sender address specified by -f
4482 encountered a router with an errors_to setting. This could be provoked only
4483 by a command such as
4487 where an empty string was supplied; "<>" did not hit this bug.
4489 11. Installed PCRE release 4.5.
4491 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4492 remained set. It is now erased.
4494 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4495 times from message ids (which are base 36 rather than the normal 62).
4497 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4498 were being counted as actual protocol errors, and logged if the log
4499 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4500 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4501 and DATA following a set of rejected RCPTs do not count as protocol errors.
4502 In other words, Exim assumes they were pipelined, though this may not
4503 actually be the case. Of course, in all cases the client gets an
4504 appropriate error code.
4506 15. If a lookup fails in an ACL condition, a message about the failure may
4507 be available; it is used if testing the ACL cannot continue, because most
4508 such messages specify what the cause of the deferral is. However, some
4509 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4510 that caused an old message to be retained and used if a later statement
4511 caused a defer, replacing the real cause of the deferral.
4513 16. If an IP address had so many PTR records that the DNS lookup buffer
4514 was not large enough to hold them, Exim could crash while trying to process
4515 the truncated data. It now detects and logs this case.
4517 17. Further to 4.21/58, another change has been made: if (and only if) the
4518 first line of a message (the first header line) ends with CRLF, a bare LF
4519 in a subsequent header line has a space inserted after it, so as not to
4520 terminate the header.
4522 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4523 unnecessarily, used atoi() instead of strtol(), and didn't check the
4524 termination when getting file sizes from file names by regex.
4526 19. Completely re-implemented the support for maildirsize files, in the light
4527 of a number of problems with the previous contributed implementation
4528 (4.30/29). In particular:
4530 . If the quota is zero, the maildirsize file is maintained, but no quota is
4533 . If the maildir directory does not exist, it is created before any attempt
4534 to write a maildirsize file.
4536 . The quota value in the file is just a cache; if the quota is changed in
4537 the transport, the new value overrides.
4539 . A regular expression is available for excluding directories from the
4542 20. The autoreply transport checks the characters in options that define the
4543 message's headers; it allows continued headers, but it was checking with
4544 isspace() after an embedded newline instead of explicitly looking for a
4547 21. If all the "regular" hosts to which an address was routed had passed their
4548 expiry times, and had not reached their retry times, the address was
4549 bounced, even if fallback hosts were defined. Now Exim should go on to try
4552 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4553 equivalent code in the SMTP transport. Some hosts send humungous responses
4554 to HELO/EHLO, more than 1024 it seems.
4556 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4557 gives compiler warnings in some environments. I've now done it "properly",
4560 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4561 (because of problems with the built-in one) was declared to return uschar *
4562 instead of char *, causing compiler failure.
4564 25. Fixed a file descriptor leak when processing alias/forward files.
4566 26. Fixed a minor format string issue in dbfn.c.
4568 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4570 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4571 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4574 29. When a sender address is verified, it is cached, to save repeating the test
4575 when there is more than one recipient in a message. However, when the
4576 verification involves a callout, it is possible for different callout
4577 options to be set for different recipients. It is too complicated to keep
4578 track of this in the cache, so now Exim always runs a verification when a
4579 callout is required, relying on the callout cache for the optimization.
4580 The overhead is duplication of the address routing, but this should not be
4583 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4584 to be verified with callout=postmaster, and the main callout worked but the
4585 postmaster check failed, the verification correctly failed. However, if a
4586 subsequent RCPT command asked for sender verification *without* the
4587 postmaster check, incorrect caching caused this verification also to fail,
4590 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4591 it was not caching the DNS options (qualify_single, search_parents) that
4592 were used when the lookup failed. A subsequent lookup with different
4593 options therefore always gave the same answer, though there were cases
4594 where it should not have. (Example: a "domains = !$mx_any" option on a
4595 dnslookup router: the "domains" option is always processed without any
4596 widening, but the router might have qualify_single set.) Now Exim uses the
4597 cached value only when the same options are set.
4599 32. Added John Jetmore's "exipick" utility to the distribution.
4601 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4602 than a timeout (e.g. a certificate is required, and is not provided), an
4603 Exim server now closes the connection immediately. Previously it waited for
4604 the client to close - but if the client is SSL, it seems that they each
4605 wait for each other, leading to a delay before one of them times out.
4607 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4608 maintained 0.8.x compatibility because I don't think many are using it, and
4609 it is clearly obsolete.
4611 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4614 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4615 client certificate was expired. A simple patch fixes this, though I don't
4616 understand the full logic of why the verify callback is called multiple
4619 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4620 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4621 which causes problems with some clients (such as the Certicom SSL Plus
4622 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4623 disables the coutermeasure allowing Eudora to connect."
4625 38. Exim was not checking that a write() to a log file succeeded. This could
4626 lead to Bad Things if a log got too big, in particular if it hit a file
4627 size limit. Exim now panics and dies if it cannot write to a log file, just
4628 as it does if it cannot open a log file.
4630 39. Modified OS/Makefile-Linux so that it now contains
4632 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4634 The two -D definitions ensure that Exim is compiled with large file
4635 support, which makes it possible to handle log files that are bigger than
4638 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4639 instance) a domain was checked against a named list that involved a lookup,
4640 causing $domain_data to be set, then another domain was checked against the
4641 same list, then the first domain was re-checked, the value of $domain_data
4642 after the final check could be wrong. In particular, if the second check
4643 failed, it could be set empty. This bug probably also applied to
4646 41. The strip_trailing_dot option was not being applied to the address given
4647 with the -f command-line option.
4649 42. The code for reading a message's header from the spool was incrementing
4650 $received_count, but never initializing it. This meant that the value was
4651 incorrect (doubled) while delivering a message in the same process in which
4652 it was received. In the most common configuration of Exim, this never
4653 happens - a fresh exec is done - but it can happen when
4654 deliver_drop_privilege is set.
4656 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4657 it now includes up to 150 characters of the unexpected data in the log
4660 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4661 and building data strings. The size of both of these buffers was 10 000
4662 bytes - far larger than anybody would *ever* want, thought I. Needless to
4663 say, somebody hit the limit. I have increased the maximum line length to
4664 20 000 and the maximum data length of concatenated lines to 100 000. I have
4665 also fixed two bugs, because there was no checking on these buffers. Tsk,
4666 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4667 buffer is too small.
4669 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4670 lsearch lookups. Now it does.
4672 46. When parsing a route_list item in a manualroute router, a fixed-length
4673 buffer was used for the list of hosts. I made this 1024 bytes long,
4674 thinking that nobody would ever have a list of hosts that long. Wrong.
4675 Somebody had a whole pile of complicated expansion conditions, and the
4676 string was silently truncated, leading to an expansion error. It turns out
4677 that it is easier to change to an unlimited length (owing to other changes
4678 that have happened since this code was originally written) than to build
4679 structure for giving a limitation error. The length of the item that
4680 expands into the list of hosts is now unlimited.
4682 47. The lsearch lookup could not handle data where the length of text line was
4683 more than 4095 characters. Such lines were truncated, leading to shortened
4684 data being returned. It should now handle lines of any length.
4686 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4687 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4690 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4691 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4692 no longer happens in comment lines. A list of replacements is now placed
4693 at the head of all of the source files, except those whose only change is
4694 to replace PERL_COMMAND in the very first #! line.
4696 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4697 messages on the queue, with a bottom-up merge sort, using code contributed
4698 by Michael Haardt. This should make operations like -bp somewhat faster on
4699 large queues. It won't affect queue runners, except when queue_run_in_order
4702 51. Installed eximstats 1.31 in the distribution.
4704 52. Added support for SRV lookups to the dnslookup router.
4706 53. If an ACL referred to $message_body or $message_body_end, the value was not
4707 reset for any messages that followed in the same SMTP session.
4709 54. The store-handling optimization for building very long strings was not
4710 differentiating between the different store pools. I don't think this
4711 actually made any difference in practice, but I've tidied it.
4713 55. While running the routers to verify a sender address, $sender_address
4714 was still set to the sender address. This is wrong, because when routing to
4715 send a bounce to the sender, it would be empty. Therefore, I have changed
4716 it so that, while verifying a sender address, $sender_address is set to <>.
4717 (There is no change to what happens when verifying a recipient address.)
4719 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4720 target A or AAAA records (if not already returned) without resetting the
4721 qualify_single or search_parents options of the DNS resolver. These are
4722 inappropriate in this case because the targets of MX and SRV records must
4723 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4724 target that, when qualified, matched something in the local domain. These
4725 two options are now turned off when doing these lookups.
4727 57. It seems that at least some releases of Reiserfs (which does not have the
4728 concept of a fixed number of inodes) returns zero and not -1 for the
4729 number of available inodes. This interacted badly with check_spool_inodes,
4730 which assumed that -1 was the "no such thing" setting. What I have done is
4731 to check that the total number of inodes is greater than zero before doing
4732 the test of how many are available.
4734 58. When a "warn" ACL statement has a log_message modifier, the message is
4735 remembered, and not repeated. This is to avoid a lot of repetition when a
4736 message has many recipients that cause the same warning to be written.
4737 Howewer, Exim was preserving the list of already written lines for an
4738 entire SMTP session, which doesn't seem right. The memory is now reset if a
4739 new message is started.
4741 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4742 debugging output unless log_rewrite was also set.
4744 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4745 of (int)(handle) when we know that handle contains (void *)(-1).
4747 61. The Exim daemon panic-logs an error return when it closes the incoming
4748 connection. However "connection reset by peer" seems to be common, and
4749 isn't really an error worthy of noting specially, so that particular error
4752 62. When Exim is trying to find all the local interfaces, it used to panic and
4753 die if the ioctl to get the interface flags failed. However, it seems that
4754 on at least one OS (Solaris 9) it is possible to have an interface that is
4755 included in the list of interfaces, but for which you get a failure error
4756 for this call. This happens when the interface is not "plumbed" into a
4757 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4758 failure of the "get flags" call assumes that the interface is down.
4760 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4761 makes life easier for people who are doing arithmetic on fields extracted
4762 from dates, where you often get leading zeros that should not be
4763 interpreted as octal.
4765 64. Added qualify_domain to the redirect router, to override the global
4768 65. If a pathologically long header line contained very many addresses (the
4769 report of this problem mentioned 10 000) and each of them was rewritten,
4770 Exim could use up a very large amount of memory. (It kept on making new
4771 copies of the header line as it rewrote, and never released the old ones.)
4772 At the expense of a bit more processing, the header rewriting function has
4773 been changed so that it no longer eats memory in this way.
4775 66. The generation of the Received: header has been moved from the time that a
4776 message starts to be received, to the time that it finishes. The timestamp
4777 in the Received: header should now be very close to that of the <= log
4778 line. There are two side-effects of this change:
4780 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4781 logged header lines no longer include the local Received: line, because
4782 it has not yet been created. The same applies to a copy of the message
4783 that is returned to a non-SMTP sender when a message is rejected.
4785 (b) When a filter file is tested using -bf, no additional Received: header
4786 is added to the test message. After some thought, I decided that this
4789 This change does not affect the value of $received_for. It is still set
4790 after address rewriting, but before local_scan() is called.
4792 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4794 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4795 gave an unhelpful panic error message, and a defer error. I have managed to
4796 change this behaviour so that it now rejects any supplied certificate,
4797 which seems right, as the list of acceptable certificates is empty.
4799 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4800 gave an unhelpful defer error. I have not managed to make this reject any
4801 supplied certificates, but the error message it gives is "no certificate
4802 supplied", which is not helpful.
4804 70. exigrep's output now also includes lines that are not associated with any
4805 message, but which match the given pattern. Implemented by a patch from
4806 Martin Sluka, which also tidied up the Perl a bit.
4808 71. Recipient callout verification, like sender verification, was using <> in
4809 the MAIL FROM command. This isn't really the right thing, since the actual
4810 sender may affect whether the remote host accepts the recipient or not. I
4811 have changed it to use the actual sender in the callout; this means that
4812 the cache record is now keyed on a recipient/sender pair, not just the
4813 recipient address. There doesn't seem to be a real danger of callout loops,
4814 since a callout by the remote host to check the sender would use <>.
4815 [SEE ABOVE: changed after hitting problems.]
4817 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4818 temporary errors. However, in the case of such a code being given after
4819 the end of a data transmission (i.e. after ".") Exim was failing to write
4820 a retry record for the message. (Yes, there was some broken host that was
4821 actually sending 8xx at this point.)
4823 73. An unknown lookup type in a host list could cause Exim to panic-die when
4824 the list was checked. (An example that provoked this was putting <; in the
4825 middle of a list instead of at the start.) If this happened during a DATA
4826 ACL check, a -D file could be left lying around. This kind of configuration
4827 error no longer causes Exim to die; instead it causes a defer errror. The
4828 incident is still logged to the main and panic logs.
4830 74. Buglet left over from Exim 3 conversion. The message "too many messages
4831 in one connection" was written to the rejectlog but not the mainlog, except
4832 when address rewriting (yes!) was being logged.
4834 75. Added write_rejectlog option.
4836 76. When a system filter was run not as root (that is, when system_filter_user
4837 was set), the values of the $n variables were not being returned to the
4838 main process; thus, they were not subsequently available in the $sn
4841 77. Added +return_path_on_delivery log selector.
4843 78. A connection timeout was being treated differently from recipients deferred
4844 when testing hosts_max_try with a message that was older than the host's
4845 retry timeout. (The host should not be counted, thus allowing all hosts to
4846 be tried at least once before bouncing.) This may have been the cause of an
4847 occasionally reported bug whereby a message would remain on the queue
4848 longer than the retry timeout, but would be bounced if a delivery was
4849 forced. I say "may" because I never totally pinned down the problem;
4850 setting up timeout/retry tests is difficult. See also the next item.
4852 79. The ultimate address timeout was not being applied to errors that involved
4853 a combination of host plus message (for example, a timeout on a MAIL
4854 command). When an address resolved to a number of possible hosts, and they
4855 were not all tried for each delivery (e.g. because of hosts_max_try), a
4856 message could remain on the queue longer than the retry timeout.
4858 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4861 81. Fixed an obscure SMTP outgoing bug which required at least the following
4862 conditions: (a) there was another message waiting for the same server;
4863 (b) the server returned 5xx to all RCPT commands in the first message so
4864 that the message was not completed; (c) the server dropped the connection
4865 or gave a negative response to the RSET that Exim sends to abort the
4866 transaction. The observed case was a dropped connection after DATA that had
4867 been sent in pipelining mode. That is, the server had advertised PIPELINING
4868 but was not implementing it correctly. The effect of the bug was incorrect
4869 behaviour, such as trying another host, and this could lead to a crash.
4875 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4876 and daemon.c were passed as pointers to ints; they should have been
4877 pointers to socklen_t variables (which are typically unsigned ints).
4879 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4882 3. Fixed a really odd bug that affected only the testing scheme; patching a
4883 certain fixed string in the binary changed the value of another string that
4884 happened to be identical to the end of the original first string.
4886 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4887 name", it returns that address as the IP address. On some operating
4888 systems (e.g. Solaris), it also passes back the IP address string as the
4889 "host name". However, on others (e.g. Linux), it passes back an empty
4890 string. Exim wasn't checking for this, and was changing the host name to an
4891 empty string, assuming it had been canonicized.
4893 5. Although rare, it is permitted to have more than one PTR record for a given
4894 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4895 all the names associated with an address, because they do in Solaris.
4896 However, it seems that they do not in Linux for data that comes from the
4897 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4898 I found this out when I moved to a new Linux workstation and tried to run
4899 the Exim test suite.
4901 To get round this problem I have changed the code so that it now does its
4902 own call to the DNS to look up PTR records when searching for a host name.
4903 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4904 addresses that are only in /etc/hosts are still found.
4906 This behaviour is, however, controlled by an option called host_lookup_
4907 order, which defaults to "bydns:byaddr". If people want to use the other
4908 order, or indeed, just use one or the other means of lookup, they can
4909 specify it in this variable.
4911 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4912 some operating systems, this comes back from gethostbyaddr() as an empty
4913 string, and this is what Exim used to test for. However, it seems that in
4914 other systems, "." is yielded. Exim now tests for this case too.
4916 7. The values of check_spool_space and check_log_space are now held internally
4917 as a number of kilobytes instead of an absolute number of bytes. If a
4918 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4919 kilobyte. This means that much larger values can be stored.
4921 8. Exim monitor: an attempt to get the action menu when not actually pointing
4922 at a message produces an empty menu entitled "No message selected". This
4923 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4924 no entries in it ("Shell widget menu has zero width and/or height"). So I
4925 have added a single, blank menu entry in this case.
4927 9. Added ${quote_local_part.
4929 10. MIME decoding is now applied to the contents of Subject: header lines when
4932 11. Now that a reference to $sender_host_address automatically causes a reverse
4933 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4934 host lookup before query-style lookups in lists that might use this
4935 variable. This has therefore been abolished, and the "net-" prefix is no
4936 longer necessary for query-style lookups.
4938 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4939 have been a typo for LFLAGS, so it has been changed.
4941 13. The install script calls Exim with "-C /dev/null" in order to find the
4942 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4943 to be output. Howeve, since Exim outputs its version number before the
4944 error, it didn't break the script. It just looked ugly. I fixed this by
4945 always allowing "-C /dev/null" if the caller is root.
4947 14. Ignore overlarge ACL variable number when reading spool file - insurance
4948 against a later release with more variables having written the file.
4950 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4951 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4952 this, as well as the form without the "IPv6" on the front.
4954 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4955 OS/Makefile-Darwin file.
4957 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4958 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4960 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4961 variable. However, some OS use ints for inodes. I've added cast to long int
4962 to get rid of the compiler warning.
4964 19. I had forgotten to lock out "/../" in configuration file names when
4965 ALT_CONFIG_PREFIX was set.
4967 20. Routers used for verification do not need to specify transports. However,
4968 if such a router generated a host list, and callout was configured, Exim
4969 crashed, because it could not find a port number from the (non-existent)
4970 transport. It now assumes port 25 in this circumstance.
4972 21. Added the -t option to exigrep.
4974 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4975 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4976 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4977 them is set, LOOKUP_LSEARCH is forced.
4979 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4981 24. Added sender and host information to the "rejected by local_scan()" log
4982 line; previously there was no indication of these.
4984 25. Added .include_if_exists.
4986 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4987 Linux. It turns out that not all file systems support this. Apparently some
4988 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4989 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4990 not supported on the file descriptor, is now ignored when Exim is trying to
4991 sync a directory. This applies only to Linux.
4993 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4995 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4996 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4999 29. Added support for maildirsize files from supplied patch (modified a bit).
5001 30. The use of :fail: followed by an empty string could lead Exim to respond to
5002 sender verification failures with (e.g.):
5004 550 Verification failed for <xxx>
5005 550 Sender verify failed
5007 where the first response line was missing the '-' that indicates it is not
5008 the final line of the response.
5010 31. The loop for finding the name of the user that called Exim had a hardwired
5011 limit of 10; it now uses the value of finduser_retries, which is used for
5012 all other user lookups.
5014 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5017 33. Exim was neglecting to zero errno before one call of strtol() when
5018 expanding a string and expecting an integer value. On some systems this
5019 resulted in spurious "integer overflow" errors. Also, it was casting the
5020 result into an int without checking.
5022 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5023 did not work. The code looks as if it has *never* worked, though it appears
5024 to have been documented since at least releast 1.62. I have made it work.
5026 35. The "timeout_DNS" error in retry rules, also documented since at least
5027 1.62, also never worked. As it isn't clear exactly what this means, and
5028 clearly it isn't a major issue, I have abolished the feature by treating it
5029 as "timeout", and writing a warning to the main and panic logs.
5031 36. The display of retry rules for -brt wasn't always showing the error code
5034 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5035 timeout_connect_A, timeout_connect_MX.
5037 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5038 to the empty sender.
5040 39. The daemon was not analysing the content of -oX till after it had closed
5041 stderr and disconnected from the controlling terminal. This meant that any
5042 syntax errors were only noted on the panic log, and the return code from
5043 the command was 0. By re-arranging the code a little, I've made the
5044 decoding happen first, so such errors now appear on stderr, and the return
5045 code is 1. However, the actual setting up of the sockets still happens in
5046 the disconnected process, so errors there are still only recorded on the
5049 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5050 connections (as happens on some IP stacks) was logged at start up time as
5051 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5052 it from "IPv6 and IPv4", which means that two separate sockets are being
5055 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5056 says whether AF_INET or AF_INET6 was passed as an argument.
5058 42. Exiwhat output was messed up when time zones were included in log
5061 43. Exiwhat now gives more information about the daemon's listening ports,
5062 and whether -tls-on-connect was used.
5064 44. The "port" option of the smtp transport is now expanded.
5066 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5067 silently ignored. Now an error message is written to the main and panic
5070 46. There's a new ACL modifier called "logwrite" which writes to a log file
5071 as soon as it is encountered.
5073 47. Added $local_user_uid and $local_user_gid at routing time.
5075 48. Exim crashed when trying to verify a sender address that was being
5078 49. Exim was recognizing only a space character after ".include". It now also
5079 recognizes a tab character.
5081 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5082 extracting the relevant information from the specification. The man page no
5083 longer contains scrambled data for the -d option, and I've added a section
5084 at the front about calling Exim under different names.
5086 51. Added "extra_headers" argument to the "mail" command in filter files.
5088 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5091 53. Installed eximstats 1.29.
5093 54. Added transport_filter_timeout as a generic transport option.
5095 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5096 Cc: header lines. This was required by RFC 822, but it not required by RFC
5099 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5100 incoming messages that did not have them. Now it does so only if the
5101 message originates locally, that is, if there is no associated remote host
5102 address. When Resent- header lines are present, this applies to the Resent-
5103 lines rather than the non-Resent- lines.
5105 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5106 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5108 58. Messages for configuration errors now include the name of the main
5109 configuration file - useful now that there may be more than one file in a
5110 list (.included file names were always shown).
5112 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5113 for those rare installations that do not start the daemon as root or run it
5114 setuid root. I've cut out the call to initgroups() if the daemon is not
5117 60. The Exim user and group can now be bound into the binary as text strings
5118 that are looked up at the start of Exim's processing.
5120 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5122 62. Added $mailstore_basename variable.
5124 63. Installed patch to sieve.c from Michael Haardt.
5126 64. When Exim failed to open the panic log after failing to open the main log,
5127 the original message it was trying to log was written to stderr and debug
5128 output, but if they were not available (the usual case in production), it
5129 was lost. Now it is written to syslog before the two lines that record the
5130 failures to open the logs.
5132 65. Users' Exim filters run in subprocesses under the user's uid. It is
5133 possible for a "deliver" command or an alias in a "personal" command to
5134 provoke an address rewrite. If logging of address rewriting is configured,
5135 this fails because the process is not running as root or exim. There may be
5136 a better way of dealing with this, but for the moment (because 4.30 needs
5137 to be released), I have disabled address rewrite logging when running a
5138 filter in a non-root, non-exim process.
5144 1. The buildconfig auxiliary program wasn't quoting the value set for
5145 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5146 not defined. This bug was masked in 4.22 by the effect that was fixed in
5149 2. Some messages that were rejected after a message id was allocated were
5150 shown as "incomplete" by exigrep. It no longer does this for messages that
5151 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5153 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5154 have allow_domain_literals set, the ID did not get logged in the <= line.
5155 Domain literals are now always recognized in Message-ID: header lines.
5157 4. The first argument for a ${extract expansion item is the key name or field
5158 number. Leading and trailing spaces in this item were not being ignored,
5159 causing some misleading effects.
5161 5. When deliver_drop_privilege was set, single queue runner processes started
5162 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5163 same command in the process it spins off) were not dropping privilege.
5165 6. When the daemon running as "exim" started a queue runner, it always
5166 re-executed Exim in the spun-off process. This is a waste of effort when
5167 deliver_drop_privilege is set. The new process now just calls the
5168 queue-runner function directly.
5174 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5177 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5178 ignored. Though the use of -oP was forcing the writing of a pid file, it
5179 was always written to the default place.
5181 3. If the message "no IP address found for host xxxx" is generated during
5182 incoming verification, it is now followed by identification of the incoming
5183 connection (so you can more easily find what provoked it).
5185 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5187 5. Added some features to "harden" Exim a bit more against certain attacks:
5189 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5190 be put in Local/Makefile. This is like the never_users runtime option,
5191 but it cannot be overridden. The default setting is "root".
5193 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5194 prefix string with which any file named in a -C command line option
5197 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5198 is retained for -C and -D only if the caller of Exim is root. Without
5199 it, the exim user may also use -C and -D and retain privilege.
5201 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5202 command line option is disabled.
5204 6. Macro names set by the -D option must start with an upper case letter, just
5205 like macro names defined in the configuration file.
5207 7. Added "dereference=" facility to LDAP.
5209 8. Two instances of the typo "uknown" in the source files are fixed.
5211 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5212 the Configure-Makefile script screwed up while processing it.
5214 10. Incorporated PCRE 4.4.
5216 11. The SMTP synchronization check was not operating right at the start of an
5217 SMTP session. For example, it could not catch a HELO sent before the client
5218 waited for the greeting. There is now a check for outstanding input at the
5219 point when the greeting is written. Because of the duplex, asynchronous
5220 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5221 way, but not yet received, when the check is performed.
5223 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5224 on TCP/IP sockets, because this apparently causes some broken clients to
5227 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5228 unchanged) from the Cygwin maintainer.
5230 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5231 was supported instead of testing for mbx. Effectively a typo.
5233 15. The spa authenticator server code was not checking that the input it
5234 received was valid base64.
5236 16. The debug output line for the "set" modifier in ACLs was not showing the
5237 name of the variable that was being set.
5239 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5241 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5242 lookup on its own. Something else was needed to trigger the lookup. For
5243 example, a match in host_lookup or the need for a host name in a host list.
5244 Now, if $sender_host_name is referenced and the host name has not yet been
5245 looked up, a lookup is performed. If the lookup fails, the variable remains
5246 empty, and $host_lookup_failed is set to "1".
5248 19. Added "eqi" as a case-independent comparison operator.
5250 20. The saslauthd authentication condition could segfault if neither service
5251 nor realm was specified.
5253 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5254 error message that was logged was misleading, and incoming SMTP
5255 connections were dropped. The message is now more accurate, and temporary
5256 errors are given to SMTP connections.
5258 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5259 (except RSET) with a 421 error, until QUIT is received. However, it was
5260 failing to send a response to QUIT.
5262 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5263 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5264 ACL is now run after the helo_try_verify_hosts code.
5266 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5267 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5268 case-independent, so other case variants are also recognized). Apparently
5269 some systems use these upper case variants.
5271 25. If more than two messages were waiting for the same host, and a transport
5272 filter was specified for the transport, Exim sent two messages over the
5273 same TCP/IP connection, and then failed with "socket operation on non-
5274 socket" when it tried to send the third.
5276 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5278 27. The extern definition of crypt16() in expand.c was not being excluded when
5279 the OS had its own crypt16() function.
5281 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5282 as a preferred synonym for return_size_limit, both as an option and as an
5285 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5287 30. Changed the default configuration ACL to relax the local part checking rule
5288 for addresses that are not in any local domains. For these addresses,
5289 slashes and pipe symbols are allowed within local parts, but the sequence
5290 /../ is explicitly forbidden.
5292 31. SPA server authentication was not clearing the challenge buffer before
5295 32. log_message in a "warn" ACL statement was writing to the reject log as
5296 well as to the main log, which contradicts the documentation and doesn't
5297 seem right (because no rejection is happening). So I have stopped it.
5299 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5300 However, I am unable to do any testing of this.
5302 34. Fixed an infelicity in the appendfile transport. When checking directories
5303 for a mailbox, to see if any needed to be created, it was accidentally
5304 using path names with one or more superfluous leading slashes; tracing
5305 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5307 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5308 contents are added to the log line that is written for every discarded
5309 recipient. (Previously a log_message setting was ignored.)
5311 36. The ${quote: operator now quotes the string if it is empty.
5313 37. The install script runs exim in order to find its version number. If for
5314 some reason other than non-existence or emptiness, which it checks, it
5315 could not run './exim', it was installing it with an empty version number,
5316 i.e. as "exim-". This error state is now caught, and the installation is
5319 38. An argument was missing from the function that creates an error message
5320 when Exim fails to connect to the socket for saslauthd authentication.
5321 This could cause Exim to crash, or give a corrupted message.
5323 39. Added isip, isip4, and isip6 to ${if conditions.
5325 40. The ACL variables $acl_xx are now saved with the message, and can be
5326 accessed later in routers, transports, and filters.
5328 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5329 strings in the file are not string-expanded.
5331 42. If a MAIL command specified a SIZE value that was too large to fit into an
5332 int variable, the check against message_size_limit failed. Such values are
5333 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5334 day this will have to be increased, but I don't think I want to be around
5335 when emails are that large.
5342 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5343 iconv() is not standard in FreeBSD.
5345 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5346 IPv6 enabled. The observed symptom was a segmentation fault on return from
5347 the function os_common_find_running_interfaces() in src/os.c.
5349 3. In the check_special_case() function in daemon.c I had used "errno" as an
5350 argument name, which causes warnings on some systems. This was basically a
5351 typo, since it was named "eno" in the comments!
5353 4. The code that waits for the clock to tick (at a resolution of some fraction
5354 of a second) so as to ensure message-id uniqueness was always waiting for
5355 at least one whole tick, when it could have waited for less. [This is
5356 almost certainly not relevant at current processor speeds, where it is
5357 unlikely to ever wait at all. But we try to future-proof.]
5359 5. The function that sleeps for a time interval that includes fractions of a
5360 second contained a race. It did not block SIGALRM between setting the
5361 timer, and suspending (a couple of lines later). If the interval was short
5362 and the sigsuspend() was delayed until after it had expired, the suspension
5363 never ended. On busy systems this could lead to processes getting stuck for
5366 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5367 process, before it forks any delivery processes. The open lookup caching
5368 mechanism meant that the open file or database connection was passed into
5369 the delivery process. The problem was that delivery processes always tidy
5370 up cached lookup data. This could cause a problem for the next delivery
5371 process started by the queue runner, because the external queue runner
5372 process does not know about the closure. So the next delivery process
5373 still has data in the lookup cache. In the case of a file lookup, there was
5374 no problem because closing a file descriptor in a subprocess doesn't affect
5375 the parent. However, if the lookup was caching a connection to a database,
5376 the connection was closed, and the second delivery process was likely to
5377 see errors such as "PGSQL: query failed: server closed the connection
5378 unexpectedly". The problem has been fixed by closing all cached lookups
5379 in a queue runner before running a delivery process.
5381 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5382 seem to have the "const" qualifier which it has on other OS. I've
5385 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5386 *of the same type* (client or server) with the same public name that an
5387 error should be diagnosed.
5389 9. When Exim looked up a host name for an IP address, but failed to find the
5390 original IP address when looking up the host name (a safety check), it
5391 output the message "<ip address> does not match any IP for NULL", which was
5392 confusing, to say the least. The bug was that the host name should have
5393 appeared instead of "NULL".
5395 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5396 user that is built into the binary, and the -C or -D options is used, root
5397 privilege is dropped before the configuration file is read. In addition,
5398 logging is switched to stderr instead of the normal log files. If the
5399 configuration then re-defines the Exim user, the unprivileged environment
5400 is probably not what is expected, so Exim logs a panic warning message (but
5403 However, if deliver_drop_privilege is set, the unprivileged state may well
5404 be exactly what is intended, so the warning has been cut out in that case,
5405 and Exim is allowed to try to write to its normal log files.
5411 1. smtp_return_error_details was not giving details for temporary sender
5412 or receiver verification errors.
5414 2. Diagnose a configuration error if two authenticators have the same public
5417 3. Exim used not to create the message log file for a message until the first
5418 delivery attempt. This could be confusing when incoming messages were held
5419 for policy or load reasons. The message log file is now created at the time
5420 the message is received, and an initial "Received" line is written to it.
5422 4. The automatically generated man page for command line options had a minor
5423 bug that caused no ill effects; however, a more serious problem was that
5424 the procedure for building the man page automatically didn't always
5425 operate. Consequently, release 4.20 contains an out-of-date version. This
5426 shouldn't happen again.
5428 5. When building Exim with embedded Perl support, the script that builds the
5429 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5430 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5432 6. The freeze_tell option was not being used for messages that were frozen on
5433 arrival, either by an ACL or by local_scan().
5435 7. Added the smtp_incomplete_transaction log selector.
5437 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5438 was accepting AUTH without a new EHLO.
5440 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5441 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5444 10. Logging of TCP/IP connections (when configured) now happens in the main
5445 daemon process instead of the child process, so that the TCP/IP connection
5446 count is more accurate (but it can never be perfect).
5448 11. The use of "drop" in a nested ACL was not being handled correctly in the
5449 outer ACL. Now, if condition failure induced by the nested "drop" causes
5450 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5451 or "require"), the connection is dropped.
5453 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5454 that yield "discard" can now be used with an "accept" or a "discard" verb,
5455 but an error is generated for any others (because I can't see a useful way
5456 to define what should happen).
5458 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5459 are now processed in the same way as lines in the Exim configuration file.
5460 In particular, continuation lines are supported.
5462 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5464 15. Added -ti meaning -t -i.
5466 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5467 domains, and warn by logging if others are found.
5469 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5470 returned from GIFCONF when Exim is trying to find the list of interfaces on
5471 a host. The code in os.c has been modified to copy each ifreq to an aligned
5472 structure in all cases.
5474 Also, in some cases, the returned ifreq's were being copied to a 'struct
5475 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5476 means the last couple of bytes of an IPv6 address could be chopped if the
5477 ifreq contained only a normal sockaddr (14 bytes storage).
5479 18. Named domain lists were not supported in the hosts_treat_as_local option.
5480 An entry such as +xxxx was not recognized, and was treated as a literal
5483 19. Ensure that header lines added by a DATA ACL are included in the reject log
5484 if the ACL subsequently rejects the message.
5486 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5487 MD5 (which is deprecated).
5489 21. When testing a filter file using -bf, Exim was writing a message when it
5490 took the sender from a "From " line in the message, but it was not doing so
5491 when it took $return_path from a Return-Path: header line. It now does.
5493 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5494 with a valid header line field name (a series of printing characters
5495 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5497 23. Changed "disc" in the source to "disk" to conform to the documentation and
5498 the book and for uniformity.
5500 24. Ignore Sendmail's -Ooption=value command line item.
5502 25. When execve() failed while trying to run a command in a pipe transport,
5503 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5504 could be confused with a return value of 69 from the command itself. This
5505 has been changed to 127, the value the shell returns if it is asked to run
5506 a non-existent command. The wording for the related log line suggests a
5507 non-existent command as the problem.
5509 26. If received_header_text expands to an empty string, do not add a Received:
5510 header line to the message. (Well, it adds a token one on the spool, but
5511 marks it "old" so that it doesn't get used or transmitted.)
5513 27. Installed eximstats 1.28 (addition of -nt option).
5515 28. There was no check for failure on the call to getsockname() in the daemon
5516 code. This can fail if there is a shortage of resources on the system, with
5517 ENOMEM, for example. A temporary error is now given on failure.
5519 29. Contrary to the C standard, it seems that in some environments, the
5520 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5521 program. Exim now does this explicitly; it affects the formatting of
5522 timestamps using strftime().
5524 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5525 complaints. I've now initialized all the variables, to avoid this.
5527 32. Header lines added by a system filter were not being "seen" during
5528 transport-time rewrites.
5530 33. The info_callback() function passed to OpenSSL is set up with type void
5531 (*)(SSL *, int, int), as described somewhere. However, when calling the
5532 function (actually a macro) that sets it up, the type void(*)() is
5533 expected. I've put in a cast to prevent warnings from picky compilers.
5535 34. If a DNS black list lookup found a CNAME record, but there were no A
5536 records associated with the domain it pointed at, Exim crashed.
5538 35. If a DNS black list lookup returned more than one A record, Exim ignored
5539 all but the first. It now scans all returned addresses if a particular IP
5540 value is being sought. In this situation, the contents of the
5541 $dnslist_value variable are a list of all the addresses, separated by a
5544 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5545 to accept a host name and all its aliases if the forward lookup for any of
5546 them yielded the IP address of the incoming connection. Now it accepts only
5547 those names whose forward lookup yields the correct IP address. Any other
5548 names are discarded. This closes a loophole whereby a rogue DNS
5549 administrator could create reverse DNS records to break through a
5550 wildcarded host restriction in an ACL.
5552 37. If a user filter or a system filter that ran in a subprocess used any of
5553 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5554 the wrong values were passed to the pipe command ($thisaddress had the
5555 value of $0, $0 had the value of $1, etc). This bug was introduced by
5556 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5558 38. Improved the line breaking for long SMTP error messages from ACLs.
5559 Previously, if there was no break point between 40 and 75 characters, Exim
5560 left the rest of the message alone. Two changes have been made: (a) I've
5561 reduced the minimum length to 35 characters; (b) if it can't find a break
5562 point between 35 and 75 characters, it looks ahead and uses the first one
5563 that it finds. This may give the occasional overlong line, but at least the
5564 remaining text gets split now.
5566 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5567 file descriptors might be low, and that setting 1000 would always raise it.
5568 It turns out that in some environments, the limit is already over 1000 and
5569 that lowering it causes trouble. So now Exim takes care not to decrease it.
5571 40. When delivering a message, the value of $return_path is set to $sender_
5572 address at the start of routing (routers may change the value). By an
5573 oversight, this default was not being set up when an address was tested by
5574 -bt or -bv, which affected the outcome if any router or filter referred to
5577 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5578 log only when "message" or "log_message" are set. However, if one of the
5579 conditions was an address verification, or a call to a nested ACL, the
5580 messages generated by the underlying test were being passed through. This
5581 no longer happens. The underlying message is available in $acl_verify_
5582 message for both "message" and "log_message" expansions, so it can be
5583 passed through if needed.
5585 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5586 new expansion $bh_ to give the encoded byte string without charset
5587 translation. Translation happens only if iconv() is available; HAVE_ICONV
5588 indicates this at build time. HEADERS_CHARSET gives the charset to
5589 translate to; headers_charset can change it in the configuration, and
5590 "headers charset" can change it in an individual filter file.
5592 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5593 that creates RFC 2047 encoded "words" labels them as that charset instead
5594 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5595 expansion operator; (ii) when Exim creates a From: line for a local
5596 message; (iii) when a header line is rewritten to include a "phrase" part.
5598 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5599 buggy, causing it to skip the first lines of messages whose message ID
5600 ended in 'D'. This would not have bitten before Exim release 4.14, because
5601 message IDs were unlikely to end in 'D' before then. The effect was to have
5602 incorrect size information for certain domains.
5604 45. #include "config.h" was missing at the start of the crypt16.c module. This
5605 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5608 46. If there was a timeout during a "random" callout check, Exim treated it as
5609 a failure of the random address, and carried on sending RSET and the real
5610 address. If the delay was just some slowness somewhere, the response to the
5611 original RCPT would be taken as a response to RSET and so on, causing
5612 mayhem of various kinds.
5614 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5615 when I implemented it. It didn't allow for the fact that some option values
5616 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5617 the right test for positive values.
5619 48. Domain names in DNS records are case-independent. Exim always looks them up
5620 in lower case. Some resolvers return domain names in exactly the case they
5621 appear in the zone file, that is, they may contain uppercase letters. Not
5622 all resolvers do this - some return always lower case. Exim was treating a
5623 change of case by a resolver as a change of domain, similar to a widening
5624 of a domain abbreviation. This triggered its re-routing code and so it was
5625 trying to route what was effectively the same domain again. This normally
5626 caused routing to fail (because the router wouldn't handle the domain
5627 twice). Now Exim checks for this case specially, and just changes the
5628 casing of the domain that it ultimately uses when it transmits the message
5631 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5634 50. If a filter generated a file delivery with a non-absolute name (possible if
5635 no home directory exists for the router), the forbid_file option was not
5638 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5639 the existing equality matching.
5641 52. Exim was using ints instead of ino_t variables in some places where it was
5642 dealing with inode numbers.
5644 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5645 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5646 called TMPDIR, and if it finds it is different, it changes its value.
5648 54. The smtp_printf() function is now made available to local_scan() so
5649 additional output lines can be written before returning. There is also an
5650 smtp_fflush() function to enable the detection of a dropped connection.
5651 The variables smtp_input and smtp_batched_input are exported to
5654 55. Changed the default runtime configuration: the message "Unknown user"
5655 has been removed from the ACL, and instead placed on the localuser router,
5656 using the cannot_route_message feature. This means that any verification
5657 failures that generate their own messages won't get overridden. Similarly,
5658 the "Unrouteable address" message that was in the ACL for unverifiable
5659 relay addresses has also been removed.
5661 56. Added hosts_avoid_esmtp to the smtp transport.
5663 57. The exicyclog script was not checking for the esoteric option
5664 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5665 will work only if exicyclog is run under the appropriate euid.
5667 58. Following a discussion on the list, the rules by which Exim recognises line
5668 endings on incoming messages have been changed. The -dropcr and drop_cr
5669 options are now no-ops, retained only for backwards compatibility. The
5670 following line terminators are recognized: LF CRLF CR. However, special
5671 processing applies to CR:
5673 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5674 nor a local message in the state where . is a terminator.
5676 (ii) If a bare CR is encountered in a header line, an extra space is added
5677 after the line terminator so as not to end the header. The reasoning
5678 behind this is that bare CRs in header lines are most likely either
5679 to be mistakes, or people trying to play silly games.
5681 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5682 was being incorrectly given as 18 bytes larger than it should have been.
5683 This is a VOB (very old bug).
5685 60. This may never have affected anything current, but just in case it has:
5686 When the local host is found other than at the start of a list of hosts,
5687 the local host, those with the same MX, and any that follow, are discarded.
5688 When the list in question was part of a longer list of hosts, the following
5689 hosts (not currently being processed) were also being discarded. This no
5690 longer happens. I'm not sure if this situation could ever has previously
5693 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5696 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5697 header. This is something that is recommended in a new Internet Draft, and
5698 is something that is documented as being done by Sendmail. There are two
5699 possible values. For messages generated by the autoreply transport, Exim
5702 Auto-Submitted: auto-replied
5704 whereas for all other generated messages (e.g. bounces) it adds
5706 Auto-Submitted: auto-generated
5708 63. The "personal" condition in filters now includes a test for the
5709 Auto-Submitted: header. If it contains the string "auto-" the message it
5710 not considered personal.
5712 64. Added rcpt_include_affixes as a generic transport option.
5714 65. Added queue_only_override (default true).
5716 66. Added the syslog_duplication option.
5718 67. If what should have been the first header line of a message consisted of
5719 a space followed by a colon, Exim was mis-interpreting it as a header line.
5720 It isn't of course - it is syntactically invalid and should therefore be
5721 treated as the start of the message body. The misbehaviour could have
5722 caused a number of strange effects, including loss of data in subsequent
5723 header lines, and spool format errors.
5725 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5726 client host had authenticated. This control can now be exercised by an ACL
5727 for more flexibility.
5729 69. By default, callouts do not happen when testing with -bh. There is now a
5730 variant, -bhc, which does actually run the callout code, including
5731 consulting and updating the callout cache.
5733 70. Added support for saslauthd authentication, courtesy of Alexander
5736 71. If statvfs() failed on the spool or log directories while checking their
5737 size for availability, Exim confusingly gave the error "space shortage".
5738 Furthermore, in debugging mode it crashed with a floating point exception.
5739 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5740 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5741 serious problem, Exim now writes to the main and panic logs when this
5742 happens, with details of the failure. It then refuses to accept the
5743 incoming message, giving the message "spool directory problem" or "log
5744 directory problem" with a 421 code for SMTP messages.
5746 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5747 0, 1, and 2 exist, because some OS complain for execs without them (see
5748 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5749 descriptors. However, the code omitted to check that the open succeeded,
5750 causing mysterious errors if for some reason the permissions on /dev/null
5751 got screwed. Now Exim writes a message to the main and panic logs, and
5752 bombs out if it can't open /dev/null.
5754 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5755 interact so that it is all more flexible. It is supposed to remain
5756 backwards compatible. Also added extra_local_interfaces.
5758 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5759 to bomb out with an assertion failure - to the client this appears as a
5760 connection drop. This problem occurs in the part of the code that was taken
5761 from the Samba project. Fortunately, the assertion is in a very simple
5762 function, so I have fixed this by reproducing the function inline in the
5763 one place where it is called, and arranging for authentication to fail
5764 instead of killing the process with assert().
5766 75. The SPA client code was not working when the server requested OEM rather
5767 than Unicode encoding.
5769 76. Added code to make require_files with a specific uid setting more usable in
5770 the case where statting the file as root fails - usually a non-root-mounted
5771 NFS file system. When this happens and the failure is EACCES, Exim now
5772 forks a subprocess and does the per-uid checking as the relevant uid.
5774 77. Added process_log_path.
5776 78. If log_file_path was not explicitly set, a setting of check_log_space or
5777 check_log_inodes was ignored.
5779 79. If a space check for the spool or log partitions fails, the incident is now
5780 logged. Of course, in the latter case the data may get lost...
5782 80. Added the %p formatting code to string_format() so that it can be used to
5783 print addresses in debug_print(). Adjusted all the address printing in the
5784 debugging in store.c to use %p rather than %d.
5786 81. There was a concern that a line of code in smtp_in.c could overflow a
5787 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5788 initially expressed, the concern was not well-founded, because trailing
5789 spaces are removed early. However, if the trailing spaces were followed by
5790 a NULL, they did not get removed, so the overflow was possible. Two fixes
5793 (a) I re-wrote the offending code in a cleaner fashion.
5794 (b) If an incoming SMTP command contains a NULL character, it is rejected
5797 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
5798 runs initgroups(), so that if the Exim user is in any additional groups,
5799 they will be used during message reception.
5805 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob