1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
10 JH/02 The smtp transport option "multi_domain" is now expanded.
12 JH/03 The smtp transport now requests PRDR by default, if the server offers
15 JH/04 Certificate name checking on server certificates, when exim is a client,
16 is now done by default. The transport option tls_verify_cert_hostname
17 can be used to disable this per-host. The build option
18 EXPERIMENTAL_CERTNAMES is withdrawn.
23 TL/01 When running the test suite, the README says that variables such as
24 no_msglog_check are global and can be placed anywhere in a specific
25 test's script, however it was observed that placement needed to be near
26 the beginning for it to behave that way. Changed the runtest perl
27 script to read through the entire script once to detect and set these
28 variables, reset to the beginning of the script, and then run through
29 the script parsing/test process like normal.
31 TL/02 The BSD's have an arc4random API. One of the functions to induce
32 adding randomness was arc4random_stir(), but it has been removed in
33 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
34 function when detected.
36 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
37 cause callback expansion.
39 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
40 syntax errors in an expansion can be treated as a string instead of
41 logging or causing an error, due to the internal use of bool_lax
42 instead of bool when processing it.
44 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
45 server certificates when making smtp deliveries.
47 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
49 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
51 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
53 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
54 Merged patch from Sebastian Wiedenroth.
56 JH/05 Fix results-pipe from transport process. Several recipients, combined
57 with certificate use, exposed issues where response data items split
58 over buffer boundaries were not parsed properly. This eventually
59 resulted in duplicates being sent. This issue only became common enough
60 to notice due to the introduction of conection certificate information,
61 the item size being so much larger. Found and fixed by Wolfgang Breyha.
63 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
64 size buffer was used, resulting in syntax errors when an expansion
67 JH/07 Add support for directories of certificates when compiled with a GnuTLS
68 version 3.3.6 or later.
70 JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef
71 is EXPERIMENTAL_EVENT, the main-configuration and transport options
72 both become "event_action", the variables become $event_name, $event_data
73 and $event_defer_errno. There is a new variable $verify_mode, usable in
74 routers, transports and related events. The tls:cert event is now also
75 raised for inbound connections, if the main configuration event_action
78 TL/06 In test suite, disable OCSP for old versions of openssl which contained
79 early OCSP support, but no stapling (appears to be less than 1.0.0).
81 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
82 server certificate names available under the smtp transport option
83 "tls_verify_cert_hostname" now do not permit multi-component wildcard
86 JH/10 Time-related extraction expansions from certificates now use the main
87 option "timezone" setting for output formatting, and are consistent
88 between OpenSSL and GnuTLS compilations. Bug 1541.
90 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
91 encoded parameter in the incoming message. Bug 1558.
93 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
94 include certificate info, eximon was claiming there were spoolfile
97 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
99 JH/14 Log delivery-related information more consistently, using the sequence
100 "H=<name> [<ip>]" wherever possible.
102 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
103 are problematic for Debian distribution, omit them from the release
106 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
108 JH/16 Fix string representation of time values on 64bit time_t anchitectures.
111 JH/17 Fix a null-indirection in certextract expansions when a nondefault
112 output list separator was used.
117 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
118 checkers that were complaining about end of non-void function with no
121 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
122 This was a regression intruduced in 4.83 by another bugfix.
124 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
126 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
127 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
133 TF/01 Correctly close the server side of TLS when forking for delivery.
135 When a message was received over SMTP with TLS, Exim failed to clear up
136 the incoming connection properly after forking off the child process to
137 deliver the message. In some situations the subsequent outgoing
138 delivery connection happened to have the same fd number as the incoming
139 connection previously had. Exim would try to use TLS and fail, logging
140 a "Bad file descriptor" error.
142 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
143 utilities have not been installed.
145 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
146 temporary space as the ACL may create new global variables.
148 TL/01 LDAP support uses per connection or global context settings, depending
149 upon the detected version of the libraries at build time.
151 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
152 to extract and use the src ip:port in logging and expansions as if it
153 were a direct connection from the outside internet. PPv2 support was
154 updated based on HAProxy spec change in May 2014.
156 JH/02 Add ${listextract {number}{list}{success}{fail}}.
158 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
159 Properly escape header and check for NULL return.
161 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
164 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
166 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
167 characters in header names, implemented as a verify condition.
168 Contributed by Michael Fischer v. Mollard.
170 TL/05 Rename SPF condition results err_perm and err_temp to standardized
171 results permerror and temperror. Previous values are deprecated but
172 still accepted. In a future release, err_perm and err_temp will be
173 completely removed, which will be a backward incompatibility if the
174 ACL tests for either of these two old results. Patch contributed by
175 user bes-internal on the mailing list.
177 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
179 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
180 selectors, in both main and reject logs.
182 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
185 JH/07 Add malware type "sock" for talking to simple daemon.
187 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
189 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
190 routers/transports under cutthrough routing.
192 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
193 numbers. Touch up "bool" conditional to keep the same definition.
195 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
197 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
199 JH/12 Expand items in router/transport headers_add or headers_remove lists
200 individually rather than the list as a whole. Bug 1452.
202 Required for reasonable handling of multiple headers_ options when
203 they may be empty; requires that headers_remove items with embedded
204 colons must have them doubled (or the list-separator changed).
206 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
207 view the policy declared in the DMARC record. Currently, $dmarc_status
208 is a combined value of both the record presence and the result of the
211 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
213 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
214 dnslookup router and the smtp transport (applying to the forward
217 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
218 of ldap servers used for a specific lookup. Patch provided by Heiko
221 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
222 New variable $lookup_dnssec_authenticated for observability.
224 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
225 Patch submitted by Lars Timman.
227 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
229 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
230 Requires trusted mode and valid format message id, aborts otherwise.
231 Patch contributed by Heiko Schlichting.
233 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
234 certextract with support for various fields. Bug 1358.
236 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
237 is requested by default, modifiable by smtp transport option
240 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
241 operate on certificate variables to give certificate fingerprints
242 Also new ${sha256:cert_variable}.
244 JH/23 The PRDR feature is moved from being Experimental into the mainline.
246 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
247 Christian Aistleitner.
249 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
251 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
252 file. Patch from Wolfgang Breyha.
254 JH/25 Expand the coverage of the delivery $host and $host_address to
255 client authenticators run in verify callout. Bug 1476.
257 JH/26 Port service names are now accepted for tls_on_connect_ports, to
258 align with daemon_smtp_ports. Bug 72.
260 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
261 support and error reporting did not work properly.
263 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
264 and is readable. Patch from Andrew Colin Kissa.
266 TL/14 Enhance documentation of ${run expansion and how it parses the
267 commandline after expansion, particularly in the case when an
268 unquoted variable expansion results in an empty value.
270 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
272 PP/02 Fix internal collision of T_APL on systems which support RFC3123
273 by renaming away from it. Addresses GH issue 15, reported by
276 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
278 TL/15 SECURITY: prevent double expansion in math comparison functions
279 (can expand unsanitized data). Not remotely exploitable.
286 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
288 PP/02 Make -n do something, by making it not do something.
289 When combined with -bP, the name of an option is not output.
291 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
294 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
295 $sender_host_name and config options to manage this, and basic check
298 PP/05 DSCP support for outbound connections and control modifier for inbound.
300 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
301 (Only plugin which currently uses this is kerberos4, which nobody should
302 be using, but we should make it available and other future plugins might
303 conceivably use it, even though it would break NAT; stuff *should* be
304 using channel bindings instead).
306 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
307 name; added for Sendmail compatibility; requires admin caller.
308 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
309 just ignore it); requires trusted caller.
310 Also parse but ignore: -Ac -Am -X<logfile>
313 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
315 TL/02 Add +smtp_confirmation as a default logging option.
317 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
318 Patch by Magnus Holmgren from 2007-02-20.
320 TL/04 Bugzilla 1281 - Spec typo.
321 Bugzilla 1283 - Spec typo.
322 Bugzilla 1290 - Spec grammar fixes.
324 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
326 TL/06 Add Experimental DMARC support using libopendmarc libraries.
328 TL/07 Fix an out of order global option causing a segfault. Reported to dev
329 mailing list by by Dmitry Isaikin.
331 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
333 JH/02 Support "G" suffix to numbers in ${if comparisons.
335 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
337 NM/01 Bugzilla 1197 - Spec typo
338 Bugzilla 1196 - Spec examples corrections
340 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
342 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
343 gnutls_enable_pkcs11, but renamed to more accurately indicate its
346 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
347 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
349 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
350 "acl {{name}{arg}...}", and optional args on acl condition
353 JH/05 Permit multiple router/transport headers_add/remove lines.
355 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
357 JH/07 Avoid using a waiting database for a single-message-only transport.
358 Performance patch from Paul Fisher. Bugzilla 1262.
360 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
363 JH/09 Add $headers_added variable, with content from use of ACL modifier
364 add_header (but not yet added to the message). Bugzilla 199.
366 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
367 Pulled from Bugzilla 817 by Wolfgang Breyha.
369 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
371 (nb: this is the same fix as in Exim 4.80.1)
373 JH/11 Add A= logging on delivery lines, and a client_set_id option on
376 JH/12 Add optional authenticated_sender logging to A= and a log_selector
379 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
381 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
382 advertise SMTP AUTH mechanism to us, instead of a generic
383 protocol violation error. Also, make Exim more robust to bad
384 data from the Dovecot auth socket.
386 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
388 When a queue runner is handling a message, Exim first routes the
389 recipient addresses, during which it prunes them based on the retry
390 hints database. After that it attempts to deliver the message to
391 any remaining recipients. It then updates the hints database using
394 So if a recipient address works intermittently, it can get repeatedly
395 deferred at routing time. The retry hints record remains fresh so the
396 address never reaches the final cutoff time.
398 This is a fairly common occurrence when a user is bumping up against
399 their storage quota. Exim had some logic in its local delivery code
400 to deal with this. However it did not apply to per-recipient defers
401 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
403 This change adds a proper retry rule check during routing so that the
404 final cutoff time is checked against the message's age. We only do
405 this check if there is an address retry record and there is not a
406 domain retry record; this implies that previous attempts to handle
407 the address had the retry_use_local_parts option turned on. We use
408 this as an approximation for the destination being like a local
409 delivery, as in LMTP.
411 I suspect this new check makes the old local delivery cutoff check
412 redundant, but I have not verified this so I left the code in place.
414 TF/02 Correct gecos expansion when From: is a prefix of the username.
416 Test 0254 submits a message to Exim with the header
420 When I ran the test suite under the user fanf2, Exim expanded
421 the header to contain my full name, whereas it should have added
422 a Resent-Sender: header. It erroneously treats any prefix of the
423 username as equal to the username.
425 This change corrects that bug.
427 GF/01 DCC debug and logging tidyup
428 Error conditions log to paniclog rather than rejectlog.
429 Debug lines prefixed by "DCC: " to remove any ambiguity.
431 TF/03 Avoid unnecessary rebuilds of lookup-related code.
433 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
434 Bug spotted by Jeremy Harris; was flawed since initial commit.
435 Would have resulted in OCSP responses post-SNI triggering an Exim
436 NULL dereference and crash.
438 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
440 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
441 Bug detection, analysis and fix by Samuel Thibault.
442 Bugzilla 1331, Debian bug #698092.
444 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
446 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
447 Server implementation by Todd Lyons, client by JH.
448 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
449 config variable "prdr_enable" controls whether the server
450 advertises the facility. If the client requests PRDR a new
451 acl_data_smtp_prdr ACL is called once for each recipient, after
452 the body content is received and before the acl_smtp_data ACL.
453 The client is controlled by bolth of: a hosts_try_prdr option
454 on the smtp transport, and the server advertisement.
455 Default client logging of deliveries and rejections involving
456 PRDR are flagged with the string "PRDR".
458 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
459 fclose(). Diagnosis by Todd Lyons.
461 PP/17 Update configure.default to handle IPv6 localhost better.
462 Patch by Alain Williams (plus minor tweaks).
465 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
466 This is now consistent with GnuTLS, and is now documented: the
467 previous undocumented portable approach to treating the option as
468 unset was to force an expansion failure. That still works, and
469 an empty string is now equivalent.
471 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
472 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
473 not performing validation itself.
475 PP/20 Added force_command boolean option to pipe transport.
476 Patch from Nick Koston, of cPanel Inc.
478 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
481 TF/04 Added udpsend ACL modifer and hexquote expansion operator
483 PP/21 Fix eximon continuous updating with timestamped log-files.
484 Broken in a format-string cleanup in 4.80, missed when I repaired the
485 other false fix of the same issue.
486 Report and fix from Heiko Schlichting.
489 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
490 Report from Prashanth Katuri.
492 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
493 It's SecureTransport, so affects any MacOS clients which use the
494 system-integrated TLS libraries, including email clients.
496 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
497 using a MIME ACL for non-SMTP local injection.
498 Report and assistance in diagnosis by Warren Baker.
500 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
502 JH/16 Fix comparisons for 64b. Bugzilla 1385.
504 TL/09 Add expansion variable $authenticated_fail_id to keep track of
505 last id that failed so it may be referenced in subsequent ACL's.
507 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
510 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
511 ldap library initialization, allowing self-signed CA's to be
512 used. Also properly sets require_cert option later in code by
513 using NULL (global ldap config) instead of ldap handle (per
514 session). Bug diagnosis and testing by alxgomz.
516 TL/12 Enhanced documentation in the ratelimit.pl script provided in
517 the src/util/ subdirectory.
519 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
520 renamed to Transport Post Delivery Action by Jeremy Harris, as
523 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
524 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
525 redis_servers = needs to be configured which will be used by the redis
526 lookup. Patch from Warren Baker, of The Packet Hub.
528 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
530 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
531 hostname or reverse DNS when processing a host list. Used suggestions
532 from multiple comments on this bug.
534 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
536 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
537 Missed a few lines, added it to make the runtest require no keyboard
540 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
541 contains upper case chars. Make router use caseful_local_part.
543 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
544 support when GnuTLS has been built with p11-kit.
550 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
552 This, or similar/improved, will also be change PP/11 of 4.82.
558 PP/01 Handle short writes when writing local log-files.
559 In practice, only affects FreeBSD (8 onwards).
560 Bugzilla 1053, with thanks to Dmitry Isaikin.
562 NM/01 Bugzilla 949 - Documentation tweak
564 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
567 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
569 PP/02 Implemented gsasl authenticator.
571 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
573 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
574 `pkg-config foo` for cflags/libs.
576 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
577 with rest of GSASL and with heimdal_gssapi.
579 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
580 `pkg-config foo` for cflags/libs for the TLS implementation.
582 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
583 properties get this fed in as external SSF. A number of robustness
584 and debugging improvements to the cyrus_sasl authenticator.
586 PP/08 cyrus_sasl server now expands the server_realm option.
588 PP/09 Bugzilla 1214 - Log authentication information in reject log.
589 Patch by Jeremy Harris.
591 PP/10 Added dbmjz lookup type.
593 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
595 PP/12 MAIL args handles TAB as well as SP, for better interop with
596 non-compliant senders.
597 Analysis and variant patch by Todd Lyons.
599 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
600 Bug report from Lars Müller <lars@samba.org> (via SUSE),
601 Patch from Dirk Mueller <dmueller@suse.com>
603 PP/13 tls_peerdn now print-escaped for spool files.
604 Observed some $tls_peerdn in wild which contained \n, which resulted
605 in spool file corruption.
607 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
608 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
609 or write after TLS renegotiation, which otherwise led to messages
612 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
613 as a tracking header (ie: a signed header comes before the signature).
614 Patch from Wolfgang Breyha.
616 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
617 comma-sep list; embedded commas doubled.
619 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
621 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
623 Report and patch from Dmitry Banschikov.
625 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
626 Removed SSL_clear() after SSL_new() which led to protocol negotiation
627 failures. We appear to now support TLS1.1+ with Exim.
629 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
630 lets Exim select keys and certificates based upon TLS SNI from client.
631 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
632 before an outbound SMTP session. New log_selector, +tls_sni.
634 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
635 NULL dereference. Report and patch from Alun Jones.
637 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
638 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
639 Not seeing resolver debug output on NetBSD, but suspect this is a
640 resolver implementation change.
642 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
643 Left warnings. Added "eximon gdb" invocation mode.
645 PP/21 Defaulting "accept_8bitmime" to true, not false.
647 PP/22 Added -bw for inetd wait mode support.
649 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
650 locate the relevant includes and libraries. Made this the default.
652 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
653 Bugzilla 1246, report and most of solution from Tomasz Kusy.
655 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
656 This may cause build issues on older platforms.
658 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
659 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
660 gnutls_require_mac & gnutls_require_protocols (no longer supported).
661 Added SNI support via GnuTLS too.
662 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
664 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
666 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
667 Applied second patch from Janne, implementing suggestion to default
668 multiple-strings-in-record handling to match SPF spec.
670 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
672 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
673 read-only, out of scope).
674 Patch from Wolfgang Breyha, report from Stuart Northfield.
676 PP/29 Fix three issues highlighted by clang analyser static analysis.
677 Only crash-plausible issue would require the Cambridge-specific
678 iplookup router and a misconfiguration.
679 Report from Marcin Mirosław.
681 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
683 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
684 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
685 As part of this, removing so much warning spew let me fix some minor
686 real issues in debug logging.
688 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
689 assignment on my part. Fixed.
691 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
692 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
693 Janne Snabb (who went above and beyond: thank you).
695 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
696 string otherwise requires a connection and a bunch more work and it's
697 relatively easy to get wrong. Should also expose TLS library linkage
700 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
701 64-bit ${eval} (JH/03).
703 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
704 GNU libc to support some of the 64-bit stuff, should not lead to
705 conflicts. Defined before os.h is pulled in, so if a given platform
706 needs to override this, it can.
708 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
709 protection layer was required, which is not implemented.
710 Bugzilla 1254, patch from Wolfgang Breyha.
712 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
713 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
714 tls_dhparam take prime identifiers. Also unbreak combination of
715 OpenSSL+DH_params+TLSSNI.
717 PP/39 Disable SSLv2 by default in OpenSSL support.
723 PP/01 Solaris build fix for Oracle's LDAP libraries.
724 Bugzilla 1109, patch from Stephen Usher.
726 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
728 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
731 TF/02 Fix a couple more cases where we did not log the error message
732 when unlink() failed. See also change 4.74-TF/03.
734 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
735 lock up or crash if it happened to be inside a call to libc when it
736 got a SIGUSR1 from exiwhat.
738 The SIGUSR1 handler appends the current process status to the process
739 log which is later printed by exiwhat. It used to use the general
740 purpose logging code to do this, but several functions it calls are
741 not safe for signals.
743 The new output code in the SIGUSR1 handler is specific to the process
744 log, and simple enough that it's easy to inspect for signal safety.
745 Removing some special cases also simplifies the general logging code.
746 Removing the spurious timestamps from the process log simplifies
749 TF/04 Improved ratelimit ACL condition.
751 The /noupdate option has been deprecated in favour of /readonly which
752 has clearer semantics. The /leaky, /strict, and /readonly update modes
753 are mutually exclusive. The update mode is no longer included in the
754 database key; it just determines when the database is updated. (This
755 means that when you upgrde Exim will forget old rate measurements.)
757 Exim now checks that the per_* options are used with an update mode that
758 makes sense for the current ACL. For example, when Exim is processing a
759 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
760 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
761 must specify per_mail/readonly. If you omit the update mode it defaults to
762 /leaky where that makes sense (as before) or /readonly where required.
764 The /noupdate option is now undocumented but still supported for
765 backwards compatibility. It is equivalent to /readonly except that in
766 ACLs where /readonly is required you may specify /leaky/noupdate or
767 /strict/noupdate which are treated the same as /readonly.
769 A useful new feature is the /count= option. This is a generalization
770 of the per_byte option, so that you can measure the throughput of other
771 aggregate values. For example, the per_byte option is now equivalent
772 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
774 The per_rcpt option has been generalized using the /count= mechanism
775 (though it's more complicated than the per_byte equivalence). When it is
776 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
777 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
778 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
779 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
780 Note that using per_rcpt with a non-readonly update mode in more than
781 one ACL will cause the recipients to be double-counted. (The per_mail
782 and per_byte options don't have this problem.)
784 The handling of very low rates has changed slightly. If the computed rate
785 is less than the event's count (usually one) then this event is the first
786 after a long gap. In this case the rate is set to the same as this event's
787 count, so that the first message of a spam run is counted properly.
789 The major new feature is a mechanism for counting the rate of unique
790 events. The new per_addr option counts the number of different
791 recipients that someone has sent messages to in the last time period. It
792 behaves like per_rcpt if all the recipient addresses are different, but
793 duplicate recipient addresses do not increase the measured rate. Like
794 the /count= option this is a general mechanism, so the per_addr option
795 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
796 example, measure the rate that a client uses different sender addresses
797 with the options per_mail/unique=$sender_address. There are further
798 details in the main documentation.
800 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
802 TF/06 Removed a few PCRE remnants.
804 TF/07 Automatically extract Exim's version number from tags in the git
805 repository when doing development or release builds.
807 PP/02 Raise smtp_cmd_buffer_size to 16kB.
808 Bugzilla 879. Patch from Paul Fisher.
810 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
811 Heavily based on revision 40f9a89a from Simon Arlott's tree.
814 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
816 PP/05 Variable $av_failed, true if the AV scanner deferred.
817 Bugzilla 1078. Patch from John Horne.
819 PP/06 Stop make process more reliably on build failure.
820 Bugzilla 1087. Patch from Heiko Schlittermann.
822 PP/07 Make maildir_use_size_file an _expandable_ boolean.
823 Bugzilla 1089. Patch from Heiko Schlittermann.
825 PP/08 Handle ${run} returning more data than OS pipe buffer size.
826 Bugzilla 1131. Patch from Holger Weiß.
828 PP/09 Handle IPv6 addresses with SPF.
829 Bugzilla 860. Patch from Wolfgang Breyha.
831 PP/10 GnuTLS: support TLS 1.2 & 1.1.
833 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
836 PP/11 match_* no longer expand right-hand-side by default.
837 New compile-time build option, EXPAND_LISTMATCH_RHS.
838 New expansion conditions, "inlist", "inlisti".
840 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
842 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
844 PP/14 fix log_write() format string regression from TF/03.
845 Bugzilla 1152. Patch from Dmitry Isaikin.
851 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
853 PP/02 Harmonised TLS library version reporting; only show if debugging.
854 Layout now matches that introduced for other libraries in 4.74 PP/03.
856 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
858 PP/04 New "dns_use_edns0" global option.
860 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
863 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
864 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
866 TK/01 Updated PolarSSL code to 0.14.2.
867 Bugzilla 1097. Patch from Andreas Metzler.
869 PP/07 Catch divide-by-zero in ${eval:...}.
872 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
875 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
876 format-string attack -- SECURITY: remote arbitrary code execution.
878 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
879 time unintentionally subject to list matching rules, letting the header
880 cause arbitrary Exim lookups (of items which can occur in lists, *not*
881 arbitrary string expansion). This allowed for information disclosure.
883 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
884 INT_MIN/-1 -- value coerced to INT_MAX.
890 NM/01 Workround for PCRE version dependency in version reporting
893 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
894 This fixes portability to compilers other than gcc, notably
895 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
897 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
898 makefiles for portability to HP-UX and POSIX correctness.
900 PP/01 Permit LOOKUP_foo enabling on the make command-line.
901 Also via indented variable definition in the Makefile.
902 (Debugging by Oliver Heesakkers).
904 PP/02 Restore caching of spamd results with expanded spamd_address.
905 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
907 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
908 Improves build reliability. Fix from: Frank Elsner
910 NM/02 Fix wide character breakage in the rfc2047 coding
911 Fixes bug 1064. Patch from Andrey N. Oktyabrski
913 NM/03 Allow underscore in dnslist lookups
914 Fixes bug 1026. Patch from Graeme Fowler
916 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
917 Code patches from Adam Ciarcinski of NetBSD.
919 NM/04 Fixed exiqgrep to cope with mailq missing size issue
922 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
923 is logged, to avoid truncation. Patch from John Horne.
925 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
926 Patch from Jakob Hirsch.
928 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
929 SQL string expansion failure details.
930 Patch from Andrey Oktyabrski.
932 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
933 Patch from Simon Arlott.
935 PP/09 New lookups functionality failed to compile on old gcc which rejects
936 extern declarations in function scope.
937 Patch from Oliver Fleischmann
939 PP/10 Use sig_atomic_t for flags set from signal handlers.
940 Check getgroups() return and improve debugging.
941 Fixed developed for diagnosis in bug 927 (which turned out to be
944 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
945 Patch from Mark Zealey.
947 PP/12 Bugzilla 1056: Improved spamd server selection.
948 Patch from Mark Zealey.
950 PP/13 Bugzilla 1086: Deal with maildir quota file races.
951 Based on patch from Heiko Schlittermann.
953 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
954 Patch from Uwe Doering, sign-off by Michael Haardt.
956 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
957 variable declaration deep within a block. Bug and patch from
960 PP/15 lookups-Makefile IRIX compatibilty coercion.
962 PP/16 Make DISABLE_DKIM build knob functional.
964 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
965 Patch by Simon Arlott
967 TF/03 Fix valgrind.h portability to C89 compilers that do not support
968 variable argument macros. Our copy now differs from upstream.
974 TF/01 Failure to get a lock on a hints database can have serious
975 consequences so log it to the panic log.
977 TF/02 Log LMTP confirmation messages in the same way as SMTP,
978 controlled using the smtp_confirmation log selector.
980 TF/03 Include the error message when we fail to unlink a spool file.
982 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
983 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
984 for maintaining out-of-tree patches for some time.
986 PP/01 Bugzilla 139: Documentation and portability issues.
987 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
988 Handle per-OS dynamic-module compilation flags.
990 PP/02 Let /dev/null have normal permissions.
991 The 4.73 fixes were a little too stringent and complained about the
992 permissions on /dev/null. Exempt it from some checks.
993 Reported by Andreas M. Kirchwitz.
995 PP/03 Report version information for many libraries, including
996 Exim version information for dynamically loaded libraries. Created
997 version.h, now support a version extension string for distributors
998 who patch heavily. Dynamic module ABI change.
1000 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1001 privilege escalation vulnerability whereby the Exim run-time user
1002 can cause root to append content of the attacker's choosing to
1005 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1008 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1009 If dropping privileges for untrusted macros, we disabled normal logging
1010 on the basis that it would fail; for the Exim run-time user, this is not
1011 the case, and it resulted in successful deliveries going unlogged.
1012 Fixed. Reported by Andreas Metzler.
1018 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1019 only prepend for the Resent-* case. Fixes regression introduced in
1020 Exim 4.70 by NM/22 for Bugzilla 607.
1022 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1023 increasing numbers of administrators be bitten by this.
1025 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1027 PP/03 Bugzilla 994: added openssl_options main configuration option.
1029 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1031 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1033 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1035 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1036 without a peer certificate, leading to a segfault because of an
1037 assumption that peers always have certificates. Be a little more
1038 paranoid. Problem reported by Martin Tscholak.
1040 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1041 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1042 NB: ClamAV planning to remove STREAM in "middle of 2010".
1043 CL also introduces -bmalware, various -d+acl logging additions and
1044 more caution in buffer sizes.
1046 PP/09 Implemented reverse_ip expansion operator.
1048 PP/10 Bugzilla 937: provide a "debug" ACL control.
1050 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1052 PP/12 Bugzilla 973: Implement --version.
1054 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1056 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1058 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1060 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1061 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1062 ignore trailing whitespace.
1064 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1066 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1069 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1070 Notification from Dr Andrew Aitchison.
1072 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1073 ExtendedDetectionInfo response format.
1074 Notification from John Horne.
1076 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1079 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1080 XSL and documented dependency on system catalogs, with examples of how
1083 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1086 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1087 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1088 configuration file which is writeable by the Exim user or group.
1090 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1091 of configuration files to cover files specified with the -C option if
1092 they are going to be used with root privileges, not just the default
1095 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1096 option (effectively making it always true).
1098 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1099 files to be used while preserving root privileges.
1101 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1102 that rogue child processes cannot use them.
1104 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1105 run-time user, instead of root.
1107 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1108 Exim run-time user without dropping privileges.
1110 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1111 result string, instead of calling string_vformat() twice with the same
1114 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1115 for other users. Others should always drop root privileges if they use
1116 -C on the command line, even for a whitelisted configure file.
1118 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1120 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1126 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1127 $data_path, and $header_path variables; fixed documentation bugs and
1130 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1131 exipick to access non-standard spools, including the "frozen" queue
1134 NM/01 Bugzilla 965: Support mysql stored procedures.
1135 Patch from Alain Williams
1137 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1139 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1140 Patch from Andreas Metzler
1142 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1143 Patch from Kirill Miazine
1145 NM/05 Bugzilla 671: Added umask to procmail example.
1147 JJ/03 installed exipick 20100323.0, fixing doc bug
1149 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1150 directory. Notification and patch from Dan Rosenberg.
1152 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1154 TK/02 Improve log output when DKIM signing operation fails.
1156 MH/01 Treat the transport option dkim_domain as a colon separated
1157 list, not as a single string, and sign the message with each element,
1158 omitting multiple occurences of the same signer.
1160 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1161 Bugzilla 985, 986. Patch by Simon Arlott
1163 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1164 Patch by Simon Arlott
1166 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1167 MBX locking. Notification from Dan Rosenberg.
1173 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1175 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1177 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1179 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1181 NM/04 Bugzilla 915: Flag broken perl installation during build.
1187 TK/01 Added patch by Johannes Berg that expands the main option
1188 "spamd_address" if it starts with a dollar sign.
1190 TK/02 Write list of recipients to X-Envelope-Sender header when building
1191 the mbox-format spool file for content scanning (suggested by Jakob
1194 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1195 (http://www.dcc-servers.net/) support via dccifd. Activated by
1196 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1198 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1199 by Mark Daniel Reidel <mr@df.eu>.
1201 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1202 When building exim an external PCRE library is now needed -
1203 PCRE is a system library on the majority of modern systems.
1204 See entry on PCRE_LIBS in EDITME file.
1206 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1207 conversation. Added nologin parameter to request.
1208 Patch contributed by Kirill Miazine.
1210 TF/01 Do not log submission mode rewrites if they do not change the address.
1212 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1214 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1215 log files in place. Contributed by Roberto Lima.
1217 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1219 TF/03 Bugzilla 615: When checking the local_parts router precondition
1220 after a local_part_suffix or local_part_prefix option, Exim now
1221 does not use the address's named list lookup cache, since this
1222 contains cached lookups for the whole local part.
1224 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1225 Robert Millan. Documentation is in experimental-spec.txt.
1227 TF/04 Bugzilla 668: Fix parallel build (make -j).
1229 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1231 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1232 Patch provided by Jan Srzednicki.
1234 TF/05 Leading white space used to be stripped from $spam_report which
1235 wrecked the formatting. Now it is preserved.
1237 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1238 that they are available at delivery time.
1240 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1242 TF/08 TLS error reporting now respects the incoming_interface and
1243 incoming_port log selectors.
1245 TF/09 Produce a more useful error message if an SMTP transport's hosts
1246 setting expands to an empty string.
1248 NM/06 Bugzilla 744: EXPN did not work under TLS.
1249 Patch provided by Phil Pennock.
1251 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1252 Patch provided by Richard Godbee.
1254 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1255 acl_smtp_notquit, added index entry.
1257 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1258 Patch provided by Eugene Bujak.
1260 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1261 accept(). Patch provided by Maxim Dounin.
1263 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1264 Patch provided by Phil Pennock.
1266 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1268 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1269 Patch provided by Brad "anomie" Jorsch.
1271 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1272 Patch provided by Dean Brooks.
1274 TK/05 Add native DKIM support (does not depend on external libraries).
1276 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1277 Patch provided by Graeme Fowler.
1279 NM/16 Bugzilla 851: Documentation example syntax fix.
1281 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1283 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1286 NM/19 Bugzilla 745: TLS version reporting.
1287 Patch provided by Phil Pennock.
1289 NM/20 Bugzilla 167: bool: condition support.
1290 Patch provided by Phil Pennock.
1292 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1293 clients. Patch provided by Phil Pennock.
1295 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1296 Patch provided by Brad "anomie" Jorsch.
1298 NM/23 Bugzilla 687: Fix misparses in eximstats.
1299 Patch provided by Heiko Schlittermann.
1301 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1302 Patch provided by Heiko Schlittermann.
1304 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1305 plus update to original patch.
1307 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1309 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1310 Patch provided by David Brownlee.
1312 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1314 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1316 NM/30 Bugzilla 888: TLS documentation bugfixes.
1318 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1320 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1321 Unlike the original bugzilla I have changed all shell scripts in src tree.
1323 NM/33 Bugzilla 898: Transport filter timeout fix.
1324 Patch by Todd Rinaldo.
1326 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1327 Patch by Serge Demonchaux.
1329 NM/35 Bugzilla 39: Base64 decode bug fixes.
1330 Patch by Jakob Hirsch.
1332 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1334 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1336 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1338 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1344 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1345 ALT-N's libdkim that I have put here:
1346 http://duncanthrax.net/exim-experimental/
1348 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1349 were called 'true' and it seems that C99 defines that as a reserved
1350 keyword to be used with 'bool' variable types. That means you could
1351 not include C99-style headers which use bools without triggering
1352 build errors in sieve.c.
1354 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1355 as mailq or other aliases. Changed the --help handling significantly
1356 to do whats expected. exim_usage() emits usage/help information.
1358 SC/01 Added the -bylocaldomain option to eximstats.
1360 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1362 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1364 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1370 PH/01 Another patch from the Sieve maintainer.
1372 PH/02 When an IPv6 address is converted to a string for single-key lookup
1373 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1374 dots are used instead of colons so that keys in lsearch files need not
1375 contain colons. This was done some time before quoting was made available
1376 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1377 (notated using the quote facility) so as to distinguish them from IPv4
1378 keys. This meant that lookups for IP addresses in host lists did not work
1379 for iplsearch lookups.
1381 This has been fixed by arranging for IPv6 addresses to be expressed with
1382 colons if the lookup type is iplsearch. This is not incompatible, because
1383 previously such lookups could never work.
1385 The situation is now rather anomolous, since one *can* have colons in
1386 ordinary lsearch keys. However, making the change in all cases is
1387 incompatible and would probably break a number of configurations.
1389 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1392 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1393 conversion specification without a maximum field width, thereby enabling
1394 a rogue spamd server to cause a buffer overflow. While nobody in their
1395 right mind would setup Exim to query an untrusted spamd server, an
1396 attacker that gains access to a server running spamd could potentially
1397 exploit this vulnerability to run arbitrary code as the Exim user.
1399 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1400 $primary_hostname instead of what libspf2 thinks the hosts name is.
1402 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1403 a directory entry by the name of the lookup key. Previously, if a
1404 symlink pointed to a non-existing file or a file in a directory that
1405 Exim lacked permissions to read, a lookup for a key matching that
1406 symlink would fail. Now it is enough that a matching directory entry
1407 exists, symlink or not. (Bugzilla 503.)
1409 PH/03 The body_linecount and body_zerocount variables are now exported in the
1412 PH/04 Added the $dnslist_matched variable.
1414 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1415 This means they are set thereafter only if the connection becomes
1418 PH/06 Added the client_condition to authenticators so that some can be skipped
1419 by clients under certain conditions.
1421 PH/07 The error message for a badly-placed control=no_multiline_responses left
1422 "_responses" off the end of the name.
1424 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1426 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1427 (without spaces) instead of just copying the configuration text.
1429 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1431 PH/11 Added $max_received_linelength.
1433 PH/12 Added +ignore_defer and +include_defer to host lists.
1435 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1436 way in which PCRE > 7.0 is built.
1438 PH/14 Implemented queue_only_load_latch.
1440 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1441 MAIL command. The effect was to mangle the value on 64-bit systems.
1443 PH/16 Another patch from the Sieve maintainer.
1445 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1447 PH/18 If a system quota error occurred while trying to create the file for
1448 a maildir delivery, the message "Mailbox is full" was not appended to the
1449 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1450 only to a quota excession during the actual writing of the file.
1452 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1453 characters?) which causes problems in log lines. The DN values are now
1454 passed through string_printing() before being added to log lines.
1456 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1457 and InterBase are left for another time.)
1459 PH/21 Added message_body_newlines option.
1461 PH/22 Guard against possible overflow in moan_check_errorcopy().
1463 PH/23 POSIX allows open() to be a macro; guard against that.
1465 PH/24 If the recipient of an error message contained an @ in the local part
1466 (suitably quoted, of course), incorrect values were put in $domain and
1467 $local_part during the evaluation of errors_copy.
1473 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1474 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1477 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1478 issue a MAIL command.
1480 PH/02 In an ACL statement such as
1482 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1484 if a client was not listed at all, or was listed with a value other than
1485 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1486 the condition was not true (as it should be), so access was not denied.
1487 The bug was that the ! inversion was incorrectly passed on to the second
1488 item. This has been fixed.
1490 PH/03 Added additional dnslists conditions == and =& which are different from
1491 = and & when the dns lookup returns more than one IP address.
1493 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1494 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1496 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1497 FSYNC, which compiles an option called disable_fsync that allows for
1498 bypassing fsync(). The documentation is heavily laced with warnings.
1500 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1502 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1503 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1504 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1505 including adding "make clean"; (3) Added -fPIC when compiling the test
1506 dynamically loaded module, to get rid of a warning.
1508 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1509 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1510 = 0s. The bug is otherwise harmless.
1512 PH/07 There was a bug in the dovecot authenticator such that the value of
1513 $auth1 could be overwritten, and so not correctly preserved, after a
1514 successful authentication. This usually meant that the value preserved by
1515 the server_setid option was incorrect.
1517 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1519 PH/09 Installed PCRE release 7.0.
1521 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1522 run for batched SMTP input. It is now run at the start of every message
1523 in the batch. While fixing this I discovered that the process information
1524 (output by running exiwhat) was not always getting set for -bs and -bS
1525 input. This is fixed, and it now also says "batched" for BSMTP.
1527 PH/11 Added control=no_pipelining.
1529 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1530 patch, slightly modified), and move the expansion of helo_data till after
1531 the connection is made in the smtp transport (so it can use these
1534 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1536 PH/14 Added log_selector = +pid.
1538 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1540 PH/16 Add ${if forany and ${if forall.
1542 PH/17 Added dsn_from option to vary the From: line in DSNs.
1544 PH/18 Flush SMTP output before performing a callout, unless control =
1545 no_callout_flush is set.
1547 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1548 was true (the default) a successful delivery failed to delete the retry
1549 item, thus causing premature timeout of the address. The bug is now
1552 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1554 PH/21 Long custom messages for fakedefer and fakereject are now split up
1555 into multiline reponses in the same way that messages for "deny" and
1556 other ACL rejections are.
1558 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1559 with slight modification.
1561 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1562 draft, changing the syntax and factoring some duplicate code".
1564 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1565 for deliveries of the second and subsequent messages over the same SMTP
1568 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1569 ${reduce, with only minor "tidies".
1571 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1573 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1574 expansion side effects.
1576 PH/27 When a message times out after an over-quota error from an Exim-imposed
1577 quota, the bounce message says "mailbox is full". This message was not
1578 being given when it was a system quota that was exceeded. It now should
1581 MH/03 Made $recipients available in local_scan(). local_scan() already has
1582 better access to the recipient list through recipients_list[], but
1583 $recipients can be useful in postmaster-provided expansion strings.
1585 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1586 in the case of a MAIL command with additional options following the
1587 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1588 were accidentally chopped off.
1590 PH/29 SMTP synchronization checks are implemented when a command is read -
1591 there is a check that no more input is waiting when there shouldn't be
1592 any. However, for some commands, a delay in an ACL can mean that it is
1593 some time before the response is written. In this time, more input might
1594 arrive, invalidly. So now there are extra checks after an ACL has run for
1595 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1596 pipelining has not been advertised.
1598 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1600 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1601 returned in the SMTP response when smtp_return_error_details was false.
1602 This has been fixed.
1604 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1605 instead of the C I/O that was originally supplied, because problems were
1606 reported on Solaris.
1608 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1609 Exim which did not show up earlier: it was assuming that a call to
1610 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1611 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1612 was a macro that became an assignment, so it seemed to work. This has
1613 changed to a proper function call with a void return, hence the compile
1614 error. Exim's code has been fixed.
1616 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1619 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1621 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1623 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1624 because it turns out to be too big or there is a timeout) there is no
1625 "Completed" line in the log. When some messages of this type were
1626 selected by exigrep, they were listed as "not completed". Others were
1627 picked up by some special patterns. I have improved the selection
1628 criteria to be more general.
1630 PH/38 The host_find_failed option in the manualroute router can now be set
1631 to "ignore", to completely ignore a host whose IP address cannot be
1632 found. If all hosts are ignored, the behaviour is controlled by the new
1633 host_all_ignored option.
1635 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1636 homing or because of multiple MX records with /mx) generated more than
1637 one IP address, and the following item turned out to be the local host,
1638 all the secondary addresses of the first item were incorrectly removed
1639 from the list, along with the local host and any following hosts (which
1640 is what is supposed to happen).
1642 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1643 whoever called Exim into the -H file. In the case of the daemon it was
1644 behaving confusingly. When first started, it used values for whoever
1645 started the daemon, but after a SIGHUP it used the Exim user (because it
1646 calls itself on a restart). I have changed the code so that it now always
1649 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1650 message are rejected with the same error (e.g. no authentication or bad
1651 sender address), and a DATA command is nevertheless sent (as can happen
1652 with PIPELINING or a stupid MUA), the error message that was given to the
1653 RCPT commands is included in the rejection of the DATA command. This is
1654 intended to be helpful for MUAs that show only the final error to their
1657 PH/42 Another patch from the Sieve maintainer.
1659 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1660 Eximstats - Fixed some broken HTML links and added missing column headers
1662 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1663 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1665 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1667 PH/43 Yet another patch from the Sieve maintainer.
1669 PH/44 I found a way to check for a TCP/IP connection going away before sending
1670 the response to the final '.' that terminates a message, but only in the
1671 case where the client has not sent further data following the '.'
1672 (unfortunately, this is allowed). However, in many cases there won't be
1673 any further data because there won't be any more messages to send. A call
1674 to select() can be used: if it shows that the input is "ready", there is
1675 either input waiting, or the socket has been closed. An attempt to read
1676 the next input character can distinguish the two cases. Previously, Exim
1677 would have sent an OK response which the client would never have see.
1678 This could lead to message repetition. This fix should cure that, at
1679 least in a lot of common cases.
1681 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1682 advertised in response to EHLO.
1688 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1689 fixed by 4.65/MH/01 (is this a record?) are fixed:
1691 (i) An empty string was always treated as zero by the numeric comparison
1692 operators. This behaviour has been restored.
1694 (ii) It is documented that the numeric comparison operators always treat
1695 their arguments as decimal numbers. This was broken in that numbers
1696 starting with 0 were being interpreted as octal.
1698 While fixing these problems I realized that there was another issue that
1699 hadn't been noticed. Values of message_size_limit (both the global option
1700 and the transport option) were treated as octal if they started with 0.
1701 The documentation was vague. These values are now always treated as
1702 decimal, and I will make that clear in the documentation.
1708 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1709 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1712 MH/01 Don't check that the operands of numeric comparison operators are
1713 integers when their expansion is in "skipping" mode (fixes bug
1714 introduced by 4.64-PH/07).
1716 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1717 child addresses, Exim now panics and dies. Previously, because the count
1718 is held in a short int, deliveries were likely to be lost. As such a
1719 large number of recipients for a single message is ridiculous
1720 (performance will be very, very poor), I have chosen to impose a limit
1721 rather than extend the field.
1727 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1728 leftover -K file (the existence of which was triggered by #402).
1729 While we were at it, introduced process PID as part of the -K
1730 filename. This should rule out race conditions when creating
1733 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1734 processing considerably. Previous code took too long for large mails,
1735 triggering a timeout which in turn triggers #401.
1737 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1738 in the DK code in transports.c. sendfile() is not really portable,
1739 hence the _LINUX specificness.
1741 TF/01 In the add_headers option to the mail command in an Exim filter,
1742 there was a bug that Exim would claim a syntax error in any
1743 header after the first one which had an odd number of characters
1746 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1747 callout verification, Exim cached a "reject" for the entire domain. This
1748 is correct for most verifications, but it is not correct for a recipient
1749 verification with use_sender or use_postmaster set, because in that case
1750 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1751 case of MAIL FROM:<> rejection from other early rejections (e.g.
1752 rejection of HELO). When verifying a recipient using a non-null MAIL
1753 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1754 Whatever the result of the callout, the value of the domain cache is
1755 left unchanged (for any other kind of callout, getting as far as trying
1756 RCPT means that the domain itself is ok).
1758 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1761 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1762 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1763 session, the daemon ignores ECONNECT errors and logs others; it now
1764 ignores EPIPE as well.
1766 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1767 (quoted-printable decoding).
1769 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1770 later the small subsequent patch to fix an introduced bug.
1772 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1774 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1776 PH/08 An error is now given if message_size_limit is specified negative.
1778 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1779 to be given (somewhat) arbitrary names.
1781 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1784 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1785 miscellaneous code fixes
1787 PH/10 Added the log_reject_target ACL modifier to specify where to log
1790 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1791 hostname. This is wrong, because it relates to the incoming message (and
1792 probably the interface on which it is arriving) and not to the outgoing
1793 callout (which could be using a different interface). This has been
1794 changed to use the value of the helo_data option from the smtp transport
1795 instead - this is what is used when a message is actually being sent. If
1796 there is no remote transport (possible with a router that sets up host
1797 addresses), $smtp_active_hostname is used.
1799 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1800 tweaks were necessary in order to get it to work (see also 21 below):
1801 (a) The code assumed that strncpy() returns a negative number on buffer
1802 overflow, which isn't the case. Replaced with Exim's string_format()
1804 (b) There were several signed/unsigned issues. I just did the minimum
1805 hacking in of casts. There is scope for a larger refactoring.
1806 (c) The code used strcasecmp() which is not a standard C function.
1807 Replaced with Exim's strcmpic() function.
1808 (d) The code set only $1; it now sets $auth1 as well.
1809 (e) A simple test gave the error "authentication client didn't specify
1810 service in request". It would seem that Dovecot has changed its
1811 interface. Fortunately there's a specification; I followed it and
1812 changed what the client sends and it appears to be working now.
1814 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1817 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1818 address A is aliased to B and C, where B exists and C does not. Without
1819 -v the output is "A verified" because verification stops after a
1820 successful redirection if more than one address is generated. However,
1821 with -v the child addresses are also verified. Exim was outputting "A
1822 failed to verify" and then showing the successful verification for C,
1823 with its parentage. It now outputs "B failed to verify", showing B's
1824 parentage before showing the successful verification of C.
1826 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1827 look up a TXT record in a specific list after matching in a combined
1830 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1831 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1832 they consult the DNS. I had assumed they would set it the way they
1833 wanted; and indeed my experiments on Linux seem to show that in some
1834 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1835 To be on the safe side, however, I have now made the interface to
1836 host_find_byname() similar to host_find_bydns(), with an argument
1837 containing the DNS resolver options. The host_find_byname() function now
1838 sets these options at its start, just as host_find_bydns() does. The smtp
1839 transport options dns_qualify_single and dns_search_parents are passed to
1840 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1841 of host_find_byname() use the default settings of RES_DEFNAMES
1842 (qualify_single) but not RES_DNSRCH (search_parents).
1844 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1845 spool_read_header() do less string testing, by means of a preliminary
1846 switch on the second character of optional "-foo" lines. (This is
1847 overdue, caused by the large number of possibilities that now exist.
1848 Originally there were few.) While I was there, I also converted the
1849 str(n)cmp tests so they don't re-test the leading "-" and the first
1850 character, in the hope this might squeeze out yet more improvement.
1852 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1853 flag allowing group syntax was set by the header_syntax check but not
1854 turned off, possible causing trouble later; (2) The flag was not being
1855 set at all for the header_verify test, causing "group"-style headers to
1856 be rejected. I have now set it in this case, and also caused header_
1857 verify to ignore an empty address taken from a group. While doing this, I
1858 came across some other cases where the code for allowing group syntax
1859 while scanning a header line wasn't quite right (mostly, not resetting
1860 the flag correctly in the right place). These bugs could have caused
1861 trouble for malformed header lines. I hope it is now all correct.
1863 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1864 with the "reply" argument non-NULL. The code, however (which originally
1865 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1866 but it didn't always do it. This confused somebody who was copying the
1867 code for some other use. I have removed all the tests.
1869 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1870 feature that was used to support insecure browsers during the U.S. crypto
1871 embargo. It requires special client support, and Exim is probably the
1872 only MTA that supported it -- and would never use it because real RSA is
1873 always available. This code has been removed, because it had the bad
1874 effect of slowing Exim down by computing (never used) parameters for the
1875 RSA_EXPORT functionality.
1877 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1878 authenticator to fail if there's a tab character in the incoming data
1879 (there should never be unless someone is messing about, as it's supposed
1880 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1881 if the connection is using TLS or if the remote IP is the same as the
1882 local IP, and the "valid-client-cert option" if a client certificate has
1885 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1886 authenticators. This can be used for authorization after authentication
1887 succeeds. (In the case of plaintext, it servers for both authentication
1890 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1891 if any retry times were supplied.
1893 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1894 connection, where there is no client IP address to check. In this
1895 situation, the verify now always succeeds.
1897 PH/25 Applied John Jetmore's -Mset patch.
1899 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1901 PH/27 In a string expansion for a processed (not raw) header when multiple
1902 headers of the same name were present, leading whitespace was being
1903 removed from all of them, but trailing whitespace was being removed only
1904 from the last one. Now trailing whitespace is removed from each header
1905 before concatenation. Completely empty headers in a concatenation (as
1906 before) are ignored.
1908 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1909 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1911 PH/29 [Removed. This was a change that I later backed out, and forgot to
1912 correct the ChangeLog entry (that I had efficiently created) before
1913 committing the later change.]
1915 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1916 address errors (4xx response to RCPT) over the same connection as other
1917 messages routed to the same hosts. Such deliveries are always "forced",
1918 so retry times are not inspected. This resulted in far too many retries
1919 for the affected addresses. The effect occurred only when there were more
1920 hosts than the hosts_max_try setting in the smtp transport when it had
1921 the 4xx errors. Those hosts that it had tried were not added to the list
1922 of hosts for which the message was waiting, so if all were tried, there
1923 was no problem. Two fixes have been applied:
1925 (i) If there are any address or message errors in an SMTP delivery, none
1926 of the hosts (tried or untried) are now added to the list of hosts
1927 for which the message is waiting, so the message should not be a
1928 candidate for sending over the same connection that was used for a
1929 successful delivery of some other message. This seems entirely
1930 reasonable: after all the message is NOT "waiting for some host".
1931 This is so "obvious" that I'm not sure why it wasn't done
1932 previously. Hope I haven't missed anything, but it can't do any
1933 harm, as the worst effect is to miss an optimization.
1935 (ii) If, despite (i), such a delivery is accidentally attempted, the
1936 routing retry time is respected, so at least it doesn't keep
1937 hammering the server.
1939 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1940 in ${readsocket because some servers need this prod.
1942 PH/32 Added some extra debug output when updating a wait-xxx database.
1944 PH/33 The hint "could be header name not terminated by colon", which has been
1945 given for certain expansion errors for a long time, was not being given
1946 for the ${if def:h_colon_omitted{... case.
1948 PH/34 The spec says: "With one important exception, whenever a domain list is
1949 being scanned, $domain contains the subject domain." There was at least
1950 one case where this was not true.
1952 PH/35 The error "getsockname() failed: connection reset by peer" was being
1953 written to the panic log as well as the main log, but it isn't really
1954 panic-worthy as it just means the connection died rather early on. I have
1955 removed the panic log writing for the ECONNRESET error when getsockname()
1958 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1959 runs only) independently of the message's sender address. This meant
1960 that, if the 4xx error was in fact related to the sender, a different
1961 message to the same recipient with a different sender could confuse
1962 things. In particualar, this can happen when sending to a greylisting
1963 server, but other circumstances could also provoke similar problems.
1964 I have changed the default so that the retry time for these errors is now
1965 based a combination of the sender and recipient addresses. This change
1966 can be overridden by setting address_retry_include_sender=false in the
1969 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1970 remote server are returned as part of bounce messages. This was not
1971 happening for LMTP over a pipe (the lmtp transport), but now it is the
1972 same for both kinds of LMTP.
1974 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1975 in header lines that were in fact CNAMEs. This is no longer the case.
1977 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1978 and queue runs started by the daemon processed all messages. This has
1979 been fixed so that -R and -S can now usefully be given with -q<time>.
1981 PH/40 Import PCRE release 6.7 (fixes some bugs).
1983 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1985 PH/42 Give an error if -q is specified more than once.
1987 PH/43 Renamed the variables $interface_address and $interface_port as
1988 $received_ip_address and $received_port, to make it clear that these
1989 values apply to message reception, and not to the outgoing interface when
1990 a message is delivered. (The old names remain recognized, of course.)
1992 PH/44 There was no timeout on the connect() call when using a Unix domain
1993 socket in the ${readsocket expansion. There now is.
1995 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1996 be meaningful with "accept".
1998 SC/01 Eximstats V1.43
1999 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2001 SC/02 Eximstats V1.44
2002 Use a glob alias rather than an array ref in the generated
2003 parser. This improves both readability and performance.
2005 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2006 Collect SpamAssassin and rejection statistics.
2007 Don't display local sender or destination tables unless
2008 there is data to show.
2009 Added average volumes into the top table text output.
2011 SC/04 Eximstats V1.46
2012 Collect data on the number of addresses (recipients)
2013 as well as the number of messages.
2015 SC/05 Eximstats V1.47
2016 Added 'Message too big' to the list of mail rejection
2017 reasons (thanks to Marco Gaiarin).
2019 SC/06 Eximstats V1.48
2020 Mainlog lines which have GMT offsets and are too short to
2021 have a flag are now skipped.
2023 SC/07 Eximstats V1.49 (Alain Williams)
2024 Added the -emptyok flag.
2026 SC/08 Eximstats V1.50
2027 Fixes for obtaining the IP address from reject messages.
2029 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2030 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2031 whitesspace changes from 4.64-PH/27
2033 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2036 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2037 are found, allow negative numbers in numeric criteria)
2039 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2041 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2042 to match changes made in 4.64-PH/43
2044 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2046 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2047 "domain" is actually an IP address, and force a failure. This locks out
2048 those revolvers/nameservers that support "A-for-A" lookups, in
2049 contravention of the specifications.
2051 PH/48 When a host name was looked up from an IP address, and the subsequent
2052 forward lookup of the name timed out, the host name was left in
2053 $sender_host_name, contrary to the specification.
2055 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2056 restricted to single-key lookups, Exim was not diagnosing an error if
2057 * or *@ was used with a query-style lookup.
2059 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2061 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2062 long ago, but noone interested enough thought of it. Let's just say that
2063 the "1.1" means that there are some new functions that weren't there at
2064 some point in the past.
2066 PH/51 Error processing for expansion failure of helo_data from an smtp
2067 transport during callout processing was broken.
2069 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2070 tested/used via the -bh/-bhc/-bs options.
2072 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2073 bug, fixed in subsequent PCRE releases).
2075 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2076 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2078 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2084 SC/01 Use a glob alias rather than an array ref in eximstats generated
2085 parser. This improves both readability and performance.
2087 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2088 Don't display local sender or destination tables in eximstats unless
2089 there is data to show.
2090 Added average volumes into the eximstats top table text output.
2092 SC/03 Collect data on the number of addresses (recipients) as well
2093 as the number of messages in eximstats.
2095 TF/01 Correct an error in the documentation for the redirect router. Exim
2096 does (usually) call initgroups() when daemonizing.
2098 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2099 with consistent privilege compared to when running as a daemon.
2101 TF/03 Note in the spec that $authenticated_id is not set for local
2102 submissions from trusted users.
2104 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2105 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2107 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2108 by adding some example configuration directives to the default
2109 configuration file. A little bit of work is required to uncomment the
2110 directives and define how usernames and passwords are checked, but
2111 there is now a framework to start from.
2113 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2114 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2115 without this. I don't know how relevant this is to other LDAP libraries.
2117 PH/02 Add the verb name to the "unknown ACL verb" error.
2119 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2121 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2123 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2124 directory not expanded when it should be if an expanded home directory
2125 was set for the address (which is overridden by the transport).
2127 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2130 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2131 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2132 because it is too late at that time, and has no effect.
2134 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2135 security issue with \' (bugzilla #107). I could not use the
2136 PQescapeStringConn() function, because it needs a PGconn value as one of
2139 PH/08 When testing addresses using -bt, indicate those final addresses that
2140 are duplicates that would not cause an additional delivery. At least one
2141 person was confused, thinking that -bt output corresponded to deliveries.
2142 (Suppressing duplicates isn't a good idea as you lose the information
2143 about possibly different redirections that led to the duplicates.)
2145 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2146 systems where poll() doesn't work, in particular OS X.
2148 PH/10 Added more information to debugging output for retry time not reached.
2150 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2151 operations in malware.c.
2153 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2156 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2157 syslog_duplication set false, log lines that would normally be written
2158 both the the main log and to the reject log were not written to syslog at
2161 PH/14 In the default configuration, change the use of "message" in ACL warn
2162 statements to "add_header".
2164 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2165 not followed by a command (e.g. "seen endif").
2167 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2168 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2171 PH/17 Added extra conditions to the default value of delay_warning_condition
2175 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2176 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2177 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2180 The Auto-Submitted: and various List- headers are standardised, whereas I
2181 don't think Precedence: ever was.
2183 PH/18 Refactored debugging code in route_finduser() to show more information,
2184 in particular, the error code if getpwnam() issues one.
2186 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2187 This is apparently needed in addition to the PH/07 change above to avoid
2188 any possible encoding problems.
2190 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2191 but not after initializing Perl.
2193 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2194 output them only if debugging. By default they are written stderr,
2195 apparently, which is not desirable.
2197 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2200 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2203 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2205 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2206 authenticated or an ident call has been made. Suppress the default
2207 values for $authenticated_id and $authenticated_sender (but permit -oMai
2208 and -oMas) when testing with -bh.
2210 PH/24 Re-jigged the order of the tests in the default configuration so that the
2211 tests for valid domains and recipients precede the DNS black list and CSA
2212 tests, on the grounds that those ones are more expensive.
2214 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2215 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2216 This bug exists in every version of Exim that I still have, right back to
2219 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2220 However, an attempt to turn on case-sensitivity in a regex key by
2221 including (?-i) didn't work because the subject string was already
2222 lowercased, and the effects were non-intuitive. It turns out that a
2223 one-line patch can be used to allow (?-i) to work as expected.
2229 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2230 other effects) broke the use of negated acl sub-conditions.
2232 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2235 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2236 "Deny" causes Exim to reject the incoming connection with a 554 error.
2237 Unfortunately, if there is a major crisis, such as a disk failure,
2238 tcp-wrappers gives "deny", whereas what one would like would be some
2239 kind of temporary error. A kludge has been added to help with this.
2240 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2241 554 error is used if errno is still zero or contains ENOENT (which occurs
2242 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2245 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2247 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2248 errors. Otherwise a message that provokes a temporary error (when other
2249 messages do not) can cause a whole host to time out.
2251 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2252 addresses were routed directly to files or pipes from a redirect router.
2253 File deliveries just didn't batch; pipe deliveries might have suffered
2256 PH/06 A failure to get a lock for a hints database would erroneously always say
2257 "Failed to get write lock", even when it was really a read lock.
2259 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2260 of 0600. This has been changed to use the value of the lockfile_mode
2261 option (which defaults to 0600).
2263 PH/08 Applied small patch from the Sieve maintainer.
2265 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2266 folder from quota calculations, a direct delivery into this folder messed
2267 up the contents of the maildirsize file. This was because the regex was
2268 used only to exclude .Trash (or whatever) when the size of the mailbox
2269 was calculated. There was no check that a delivery was happening into an
2270 excluded directory. This bug has been fixed by ignoring all quota
2271 processing for deliveries into excluded directories.
2273 PH/10 Added the maildirfolder_create_regex option to appendfile.
2279 PH/01 The code for finding all the local interface addresses on a FreeBSD
2280 system running IPv6 was broken. This may well have applied to all BSD
2281 systems, as well as to others that have similar system calls. The broken
2282 code found IPv4 interfaces correctly, but gave incorrect values for the
2283 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2284 that it would not match correctly against @[] and not recognize the IPv6
2287 PH/02 The ipliteral router was not recognizing addresses of the form user@
2288 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2290 PH/03 Added disable_ipv6.
2292 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2293 decoded form, because it is most often used to construct To: headers
2294 lines in autoreplies, and the decoded form may well be syntactically
2295 invalid. However, $reply_address has leading white space removed, and all
2296 newlines turned into spaces so that the autoreply transport does not
2299 PH/05 If group was specified without a user on a router, and no group or user
2300 was specified on a transport, the group from the router was ignored.
2302 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2303 for visible compile-time settings that can be used to change these
2304 numbers, for those that want even more. Backwards compatibility with old
2305 spool files has been maintained. However, going back to a previous Exim
2306 release will lost any variables that are in spool files.
2308 PH/07 Two small changes when running in the test harness: increase delay when
2309 passing a TCP/IP connection to a new process, in case the original
2310 process has to generate a bounce, and remove special handling of
2311 127.0.0.2 (sic), which is no longer necessary.
2313 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2314 be the same on different OS.
2316 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2319 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2320 whether --show-vars was specified or not
2322 JJ/02 exipick: Added support for new ACL variable spool format introduced
2325 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2326 syntactically invalid From: or Reply-to: line, and a filter used this to
2327 generate an autoreply, and therefore failed to obtain an address for the
2328 autoreply, Exim could try to deliver to a non-existent relative file
2329 name, causing unrelated and misleading errors. What now happens is that
2330 it logs this as a hard delivery error, but does not attempt to create a
2333 PH/11 The exinext utility has a -C option for testing purposes, but although
2334 the given file was scanned by exinext itself; it wasn't being passed on
2335 when Exim was called.
2337 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2338 an end-of-file indication when reading a command response.
2340 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2341 compiled. In many other places in Exim, IPv6 addresses are always
2342 recognized, so I have changed this. It also means that IPv4 domain
2343 literals of the form [IPV4:n.n.n.n] are now always recognized.
2345 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2346 used if the router is not running as root, for example, when verifying at
2347 ACL time, or when using -bh. The debugging output from this situation was
2348 non-existent - all you got was a failure to exec. I have made two
2351 (a) Failures to set uid/gid, the current directory, or a process leader
2352 in a subprocess such as that created by queryprogram now generate
2353 suitable debugging ouput when -d is set.
2355 (b) The queryprogram router detects when it is not running as root,
2356 outputs suitable debugging information if -d is set, and then runs
2357 the subprocess without attempting to change uid/gid.
2359 PH/15 Minor change to Makefile for building test_host (undocumented testing
2362 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2363 additional section of a DNS packet that returns MX or SRV records.
2364 Instead, it always explicitly searches for A/AAAA records. This avoids
2365 major problems that occur when a DNS server includes only records of one
2366 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2367 fixed another bug: if SRV records were looked up and the corresponding
2368 address records were *not* found in the additional section, the port
2369 values from the SRV records were lost.
2371 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2372 using the correct key (the original address) when searching the retry
2373 rules in order to find which one to use for generating the retry hint.
2375 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2376 adding the default one. Similarly, if it contains a Reply-To: header, the
2377 errors_reply_to option, if set, is not used.
2379 PH/19 When calculating a retry time, Exim used to measure the "time since
2380 failure" by looking at the "first failed" field in the retry record. Now
2381 it does not use this if it is later than than the arrival time of the
2382 message. Instead it uses the arrival time. This makes for better
2383 behaviour in cases where some deliveries succeed, thus re-setting the
2384 "first failed" field. An example is a quota failure for a huge message
2385 when small messages continue to be delivered. Without this change, the
2386 "time since failure" will always be short, possible causing more frequent
2387 delivery attempts for the huge message than are intended.
2388 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2390 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2391 $1, $2, $3) because the numerical variables can be reset during some
2392 expansion items (e.g. "match"), thereby losing the authentication data.
2394 PH/21 Make -bV show the size of off_t variables so that the test suite can
2395 decide whether to run tests for quotas > 2G.
2397 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2398 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2399 filecount value is greater than 2G or if a quota value is greater than 2G
2400 on a system where the size of off_t is not greater than 4, a panic error
2403 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2404 never match. The debug and -bh output now contains an explicit error
2405 message indicating a malformed IPv4 address or mask.
2407 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2408 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2409 PH/23 above applies.
2411 PH/25 Do not write to syslog when running in the test harness. The only
2412 occasion when this arises is a failure to open the main or panic logs
2413 (for which there is an explicit test).
2415 PH/26 Added the /no_tell option to "control=freeze".
2417 PH/27 If a host name lookup failed very early in a connection, for example, if
2418 the IP address matched host_lookup and the reverse lookup yielded a name
2419 that did not have a forward lookup, an error message of the form "no IP
2420 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2421 could be logged. Now it outputs the IP address instead of "NULL".
2423 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2424 allows the sender and the authenticated sender to be set when
2425 submitting a message from within Exim. Since child_open_exim() is
2426 documented for local_scan(), the new function should be too.
2428 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2429 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2430 results in an empty string is now treated as unset.
2432 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2434 PH/31 Added sender_verify_fail logging option.
2436 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2437 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2438 tidied the source and removed it altogether.
2440 PH/33 When a queue run was abandoned because the load average was too high, a
2441 log line was always written; now it is written only if the queue_run log
2442 selector is set. In addition, the log line for abandonment now contains
2443 information about the queue run such as the pid. This is always present
2444 in "start" and "stop" lines but was omitted from the "abandon" line.
2446 PH/34 Omit spaces between a header name and the colon in the error message that
2447 is given when verify = headers_syntax fails (if there are lots of them,
2448 the message gets confusing).
2450 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2451 names, as there are now some PTR records that contain slashes. This check
2452 is only to protect against broken name servers that fall over on strange
2453 characters, so the fact that it applies to all lookups doesn't matter.
2455 PH/36 Now that the new test suite is complete, we can remove some of the
2456 special code in Exim that was needed for the old test suite. For example,
2457 sorting DNS records because real resolvers return them in an arbitrary
2458 order. The new test suite's fake resolver always returns records in the
2461 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2462 bounces) except when queue_only is set, to avoid logging races between
2463 the different processes.
2465 PH/38 Panic-die if .include specifies a non-absolute path.
2467 PH/39 A tweak to the "H" retry rule from its user.
2469 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2470 a label. They prevented compilation on older perls.
2472 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2473 a warning to be raised on newish perls.
2475 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2476 on queue. Changes to match documented behaviour of showing count of
2477 messages matching specified criteria.
2479 PH/40 Changed the default ident timeout from 30s to 5s.
2481 PH/41 Added support for the use of login_cap features, on those BSD systems
2482 that have them, for controlling the resources used by pipe deliveries.
2484 PH/42 The content-scanning code uses fopen() to create files in which to put
2485 message data. Previously it was not paying any attention to the mode of
2486 the files. Exim runs with umask(0) because the rest of the code creates
2487 files with open(), and sets the required mode explicitly. Thus, these
2488 files were ending up world-writeable. This was not a big issue, because,
2489 being within the spool directory, they were not world-accessible. I have
2490 created a function called modefopen, which takes an additional mode
2491 argument. It sets umask(777), creates the file, chmods it to the required
2492 mode, then resets the umask. All the relevant calls to fopen() in the
2493 content scanning code have been changed to use this function.
2495 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2496 to 24 hours. This avoids potential overflow problems when processing G
2497 and H retry rules. I suspect nobody ever tinkers with this value.
2499 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2501 PH/45 When the plaintext authenticator is running as a client, the server's
2502 challenges are checked to ensure they are valid base64 strings. By
2503 default, the authentication attempt is cancelled if an invalid string is
2504 received. Setting client_ignore_invalid_base64 true ignores these errors.
2505 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2506 they are received. Thus, the responses can be made to depend on the
2507 challenges. If an invalid string is ignored, an empty string is placed in
2510 PH/46 Messages that are created by the autoreply transport now contains a
2511 References: header, in accordance with RFCs 2822 and 3834.
2513 PH/47 Added authenticated_sender_force to the smtp transport.
2515 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2517 PH/49 Installed latest patch from the Sieve maintainer.
2519 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2520 was also set, the appendfile transport was unnecessarily scanning a
2521 directory of message files (e.g. for maildir delivery) to find the count
2522 of files (along with the size), even though it did not need this
2523 information. It now does the scan only if it needs to find either the
2524 size of the count of files.
2526 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2528 PH/52 Two bugs concerned with error handling when the smtp transport is
2531 (i) Exim was not creating retry information for temporary errors given
2532 for individual recipients after the DATA command when the smtp transport
2533 was used in LMTP mode. This meant that they could be retried too
2534 frequently, and not timed out correctly.
2536 (ii) Exim was setting the flag that allows error details to be returned
2537 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2538 recipients that were returned after the DATA command.
2540 PH/53 This is related to PH/52, but is more general: for any failing address,
2541 when detailed error information was permitted to be returned to the
2542 sender, but the error was temporary, then after the final timeout, only
2543 "retry timeout exceeded" was returned. Now it returns the full error as
2544 well as "retry timeout exceeded".
2546 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2547 do this, and (what is worse) MTAs that accept it.
2549 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2550 will now be deprecated.
2552 PH/56 New os.c-cygwin from the Cygwin maintainer.
2554 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2555 formats (previously only available in exim formats via -bpr, -bpru,
2556 and -bpra. Now also available in native and exiqgrep formats)
2558 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2559 with very large, slow to parse queues
2561 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2563 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2565 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2566 responses to authentication challenges, though it was showing the
2567 challenges; (ii) I've removed the CR characters from the debug output for
2570 PH/58 Allow for the insertion of a newline as well as a space when a string
2571 is turned into more than one encoded-word during RFC 2047 encoding. The
2572 Sieve code now uses this.
2574 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2575 data_4xx, lost_connection, tls_required.
2577 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2578 message was being sent as an SMTP response.
2580 PH/61 Add -l and -k options to exicyclog.
2582 PH/62 When verifying, if an address was redirected to one new address, so that
2583 verification continued, and the new address failed or deferred after
2584 having set something in $address_data, the value of $address_data was not
2585 passed back to the ACL. This was different to the case when no
2586 redirection occurred. The value is now passed back in both cases.
2588 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2589 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2590 use login_cap.h, so on its own it isn't the distinguishing feature. The
2591 new name refers directly to the setclassresources() function.
2593 PH/65 Added configuration files for NetBSD3.
2595 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2597 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2598 is preferred over IPv4.
2600 PH/68 The bounce_return_message and bounce_return_body options were not being
2601 honoured for bounces generated during the reception of non-SMTP messages.
2602 In particular, this applied to messages rejected by the ACL. This bug has
2603 been fixed. However, if bounce_return_message is true and bounce_return_
2604 body is false, the headers that are returned for a non-SMTP message
2605 include only those that have been read before the error was detected.
2606 (In the case of an ACL rejection, they have all been read.)
2608 PH/69 The HTML version of the specification is now built in a directory called
2609 spec_html instead of spec.html, because the latter looks like a path with
2610 a MIME-type, and this confuses some software.
2612 PH/70 Catch two compiler warnings in sieve.c.
2614 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2615 function verify_get_ident() calls ip_connect() to connect a socket, but
2616 if the "connect()" function timed out, ip_connect() used to close the
2617 socket. However, verify_get_ident() also closes the socket later, and in
2618 between Exim writes to the log, which may get opened at this point. When
2619 the socket was closed in ip_connect(), the log could get the same file
2620 descriptor number as the socket. This naturally causes chaos. The fix is
2621 not to close the socket in ip_connect(); the socket should be closed by
2622 the function that creates it. There was only one place in the code where
2623 this was missing, in the iplookup router, which I don't think anybody now
2624 uses, but I've fixed it anyway.
2626 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2627 well as to direct DNS lookups. Otherwise the handling of names in host
2628 lists is inconsistent and therefore confusing.
2634 PH/01 Two changes to the default runtime configuration:
2636 (1) Move the checks for relay_from_hosts and authenticated clients from
2637 after to before the (commented out) DNS black list checks.
2639 (2) Add control=submission to the relay_from_hosts and authenticated
2640 clients checks, on the grounds that messages accepted by these
2641 statements are most likely to be submissions.
2643 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2645 (1) Generate an error if the third argument for the ${prvs expansion is
2648 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2651 (3) Reset the variables that are obtained from the first argument of
2652 ${prvscheck and used in the second argument before leaving the code,
2653 because their memory is reclaimed, so using them afterwards may do
2656 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2657 one (it's much easier than Tom thought :-).
2659 (5) Because of (4), we can now allow for the use of $prvscheck_result
2660 inside the third argument.
2662 PH/03 For some reason, the default setting of PATH when running a command from
2663 a pipe transport was just "/usr/bin". I have changed it to
2666 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2667 anything to be listed in the output from -bV.
2669 PH/05 When a filter generated an autoreply, the entire To: header line was
2670 quoted in the delivery log line, like this:
2672 => >A.N.Other <ano@some.domain> <original@ddress> ...
2674 This has been changed so that it extracts the operative address. There
2675 may be more than one such address. If so, they are comma-separated, like
2678 => >ano@some.domain,ona@other.domain <original@ddress> ...
2680 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2681 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2682 not being looked up in the rDNS to get a host name, Exim was showing the
2683 IP address twice in Received: lines, even though the IP addresses were
2684 identical. For example:
2686 Received: from [1.2.3.4] (helo=[1.2.3.4])
2688 However, if the real host name was known, it was omitting the HELO data
2689 if it matched the actual IP address. This has been tidied up so that it
2690 doesn't show the same IP address twice.
2692 PH/07 When both +timestamp and +memory debugging was on, the value given by
2693 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2694 called by the debug printing, thereby overwriting the timestamp buffer.
2695 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2697 PH/08 When the original message was included in an autoreply transport, it
2698 always said "this is a copy of the message, including all the headers",
2699 even if body_only or headers_only was set. It now gives an appropriate
2702 PH/09 Applied a patch from the Sieve maintainer which:
2704 o fixes some comments
2705 o adds the (disabled) notify extension core
2706 o adds some debug output for the result of if/elsif tests
2707 o points to the current vacation draft in the documentation
2708 and documents the missing references header update
2712 o fixes a bug in processing the envelope test (when testing
2713 multiple envelope elements, the last element determinted the
2716 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2717 Electronic Mail") by including:
2719 Auto-submitted: auto-generated
2721 in the messages that it generates (bounce messages and others, such as
2722 warnings). In the case of bounce messages for non-SMTP mesages, there was
2723 also a typo: it was using "Auto_submitted" (underscore instead of
2724 hyphen). Since every message generated by Exim is necessarily in response
2725 to another message, thes have all been changed to:
2727 Auto-Submitted: auto-replied
2729 in accordance with these statements in the RFC:
2731 The auto-replied keyword:
2733 - SHOULD be used on messages sent in direct response to another
2734 message by an automatic process,
2736 - MUST NOT be used on manually-generated messages,
2738 - MAY be used on Delivery Status Notifications (DSNs) and Message
2739 Disposition Notifications (MDNs),
2741 - MUST NOT be used on messages generated by automatic or periodic
2742 processes, except for messages which are automatic responses to
2745 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2746 to the default Received: header definition.
2748 PH/12 Added log selector acl_warn_skipped (default on).
2750 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2751 variables because (a) they are in the wrong storage pool and (b) even if
2752 they were copied, it wouldn't work properly because of the caching.
2754 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2755 checking when decoding. Apparently there are clients that generate
2756 overlong encoded strings. Why am I not surprised?
2758 PH/15 If the first argument of "${if match_address" was not empty, but did not
2759 contain an "@" character, Exim crashed. Now it writes a panic log message
2760 and treats the condition as false.
2762 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2764 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2765 extension "envelope-auth". The code is finished and in agreement with
2766 other implementations, but there is no documentation so far and in fact,
2767 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2768 not changing the active code.
2770 Print executed "if" and "elsif" statements when debugging is used. This
2771 helps a great deal to understand what a filter does.
2773 Document more things not specified clearly in RFC3028. I had all this
2774 sorted out, when out of a sudden new issues came to my mind. Oops."
2776 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2779 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2780 canonical form (as documented). However, after a host name lookup from
2781 the IP address, check_host() was doing a simple string comparison with
2782 addresses acquired from the DNS when checking that the found name did
2783 have the original IP as one of its addresses. Since any found IPv6
2784 addresses are likely to be in abbreviated form, the comparison could
2785 fail. Luckily, there already exists a function for doing the comparison
2786 by converting both addresses to binary, so now that is used instead of
2787 the text comparison.
2789 PH/20 There was another similar case to PH/19, when a complete host name was
2790 given in a host list; looking up its IP address could give an abbreviated
2791 form, whereas the current host's name might or might not be abbreviated.
2792 The same fix has been applied.
2798 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2799 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2802 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2803 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2805 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2807 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2808 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2809 Also, for "Auto-Submitted", treat anything other than "no" as
2810 non-personal, in accordance with RFC 3834. (Previously it treated
2811 anything starting "auto-" as non-personal.)
2813 TF/01 The control=submission/name=... option had a problem with syntax
2814 errors if the name included a slash character. The /name= option
2815 now slurps the rest of the string, so it can include any characters
2816 but it must come last in the list of options (after /sender_retain
2819 PH/05 Some modifications to the interface to the fake nameserver for the new
2827 TK/01 Added the "success_on_redirect" address verification option. See
2828 NewStuff for rationale and an example.
2830 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2832 PH/02 Patch to exigrep to allow it to work on syslog lines.
2834 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2835 fread() to skip over the body file's header line, because in Cygwin the
2836 header line is locked and is inaccessible.
2838 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2839 co-exist for some time) to make it clear that it is the Exim ID that is
2840 referenced, not the Message-ID: header line.
2842 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2843 string_format() function, because snprintf() does not exist on all
2846 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2847 ${stat: expansion item.
2849 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2850 protocol synchronization error", to keep the pedants happy.
2852 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2853 well as for IRIX systems, when gcc is being used. See the host.c source
2856 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2858 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2861 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2862 transport and to the smtp transport in LMTP mode.
2864 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2866 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2867 run a filter in a subprocess. This could lead to confusion in subsequent
2868 lookups in the parent process. There should also be a search_tidyup() at
2869 the end of the subprocess.
2871 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2872 only if the host matched helo_try_verify_hosts, which caused the
2873 verification to occur when the EHLO/HELO command was issued. The ACL just
2874 tested the remembered result. Now, if a previous verification attempt has
2875 not happened, "verify = helo" does it there and then.
2877 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2879 TK/03 Fix log output including CR from clamd.
2881 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2882 exist provoked a memory error which could cause a segfault.
2884 PH/15 Installed PCRE 6.2
2886 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2888 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2889 of the problem. Specifically, suggested +O2 rather than +O1 for the
2892 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2894 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2895 record, the port was not correctly logged when the outgoing_port log
2896 selector was set (it logged the transort's default port).
2898 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2899 fallback_hosts, and "hosts" in the smtp transport.
2901 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2902 host errors such as "Connection refused".
2904 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2905 authentication with radiusclient 0.4.9:
2907 - Error returned from rc_read_config was caught wrongly
2908 - Username/password not passed on to radius server due to wrong length.
2910 The presumption is that some radiusclient API changes for 4.51/PH/17
2911 were not taken care of correctly. The code is still untested by me (my
2912 Linux distribution still has 0.3.2 of radiusclient), but it was
2913 contributed by a Radius user.
2915 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2916 expanding the "port" option of the smtp transport.
2918 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2919 while reading a MIME header. Thanks to Tom Hughes for a patch.
2921 PH/24 Include config.h inside local_scan.h so that configuration settings are
2924 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2925 that in an ACL for RCPT (for example), you can examine exactly what was
2928 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2929 commands, but it was not correctly comparing the address with the actual
2930 client host address. Thus, it would show the EHLO address in Received:
2931 header lines when this was not necessary.
2933 PH/27 Added the % operator to ${eval:}.
2935 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2936 it should be ignoring failures (because with -C, for example, it has lost
2937 privilege). It wasn't ignoring creation failures other than "already
2940 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2943 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2944 because an input line was too long, either on its own, or by virtue of
2945 too many continuations, the temporary file was not being removed, and the
2946 return code was incorrect.
2948 PH/31 Missing "BOOL" in function definition in filtertest.c.
2950 PH/32 Applied Sieve patches from the maintainer.
2952 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2954 PH/33 Added "verify = not_blind".
2956 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2957 Local/Makefile (with some defaults set). These are used in built scripts
2958 such as exicyclog, but they have never been used in the exim_install
2959 script (though there are many overriding facilities there). I have
2960 arranged that the exim_install script now takes note of these two
2963 PH/35 Installed configuration files for Dragonfly.
2965 PH/36 When a locally submitted message by a trusted user did not contain a
2966 From: header, and the sender address was obtained from -f or from an SMTP
2967 MAIL command, and the trusted user did not use -F to supply a sender
2968 name, $originator_name was incorrectly used when constructing a From:
2969 header. Furthermore, $originator_name was used for submission mode
2970 messages from external hosts without From: headers in a similar way,
2971 which is clearly wrong.
2973 PH/37 Added control=suppress_local_fixups.
2975 PH/38 When log_selector = +received_sender was set, and the addition of the
2976 sender made the log line's construction buffer exactly full, or one byte
2977 less than full, an overflow happened when the terminating "\n" was
2980 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2981 when the result of a list match is failure because a DNS lookup failed.
2983 PH/40 RM_COMMAND is now used in the building process.
2985 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2986 the "build-* directories that it finds.
2988 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2989 address in a domain literal was a prefix of an interface address.
2991 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2992 when verifying a sender address, unless rewrite_headers is false.
2994 PH/44 Wrote a long comment about why errors_to addresses are verified as
2995 recipients, not senders.
2997 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2998 the ratelimit ACL was added.
3000 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3002 PH/46 Added extra information about PostgreSQL errors to the error string.
3004 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3005 avoiding the need to install special zones in a real server. This is
3006 backwards compatible; if it can't find the fake resolver, it drops back.
3007 Thus, both old and new test suites can be run.
3009 TF/02 Added util/ratelimit.pl
3011 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3012 clock is set back in time.
3014 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3015 Candler <B.Candler@pobox.com>.
3017 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3018 OK for addresses that are the result of redirections.
3020 PH/48 A number of further additions for the benefit of the new test suite,
3021 including a fake gethostbyname() that interfaces to the fake DNS resolver
3024 TF/06 The fix for widen_domains has also been applied to qualify_single and
3025 search_parents which are the other dnslookup options that can cause
3028 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3031 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3033 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3034 service" if it encountered an MX record with an empty target hostname.
3035 The message is now "an MX or SRV record indicated no SMTP service".
3037 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3038 if the DNS of the sending site is misconfigured. This is quite a
3039 common situation. This change restores the behaviour of treating a
3040 helo verification defer as a failure.
3042 PH/51 If self=fail was set on a router, the bounce message did not include the
3043 actual error message.
3049 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3051 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3052 command itself ended in error, the underlying message about the transport
3053 filter timeout was being overwritten with the pipe command error. Now the
3054 underlying error message should be appended to the second error message.
3056 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3058 PH/02 Reduce the amount of output that "make" produces by default. Full output
3059 can still be requested.
3061 PH/03 The warning log line about a condition test deferring for a "warn" verb
3062 was being output only once per connection, rather than after each
3063 occurrence (because it was using the same function as for successful
3064 "warn" verbs). This seems wrong, so I have changed it.
3066 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3067 it should not have, which might have caused a crash in the right
3068 circumstances, but probably never did.
3070 PH/04 Installed a modified version of Tony Finch's patch to make submission
3071 mode fix the return path as well as the Sender: header line, and to
3072 add a /name= option so that you can make the user's friendly name appear
3075 TF/03 Added the control = fakedefer ACL modifier.
3077 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3078 Mark Lowes for thorough testing.
3080 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3082 TK/03 Merged latest SRS patch from Miles Wilton.
3084 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3085 with the definition in sysexits.h (which is #included earlier).
3086 Fortunately, Exim does not actually use EX_OK. The code used to try to
3087 preserve the sysexits.h value, by assumimg that macro definitions were
3088 scanned for macro replacements. I have been disabused of this notion,
3089 so now the code just undefines EX_OK before #including unistd.h.
3091 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3092 in the smtp transport. When a block could not be written in a single
3093 write() function, the timeout was being re-applied to each part-write.
3094 This seems wrong - if the receiver was accepting one byte at a time it
3095 would take for ever. The timeout is now adjusted when this happens. It
3096 doesn't have to be particularly precise.
3098 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3099 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3101 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3102 without a domain if the check to <postmaster@domain> fails.
3104 SC/01 Eximstats: added -xls and the ability to specify output files
3105 (patch written by Frank Heydlauf).
3107 SC/02 Eximstats: use FileHandles for outputing results.
3109 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3111 SC/04 Eximstats: fixed display of large numbers with -nvr option
3113 SC/05 Eximstats: fixed merging of reports with empty tables.
3115 SC/06 Eximstats: added the -include_original_destination flag
3117 SC/07 Eximstats: removed tabs and trailing whitespace.
3119 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3121 TK/06 MBOX spool code: Add real "From " MBOX separator line
3122 so the .eml file is really in mbox format (even though
3123 most programs do not really care). Patch from Alex Miller.
3125 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3126 The latter is generated from $received_to and is only set if the
3127 message has one envelope recipient. SA can use these headers,
3128 obviously out-of-the-box. Patch from Alex Miller.
3130 PH/08 The ${def test on a variable was returning false if the variable's
3131 value was "0", contrary to what the specification has always said!
3132 The result should be true unless the variable is empty.
3134 PH/09 The syntax error of a character other than { following "${if
3135 def:variable_name" (after optional whitespace) was not being diagnosed.
3136 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3137 accidental colon was present, for example, could give incorrect results.
3139 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3140 result is used (not including appendfile, where other changes are about
3143 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3144 This involved changing a lot of size variables from int to off_t. It
3145 should work with maildirs and everything.
3147 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3148 spamd dying while we are connected to it.
3150 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3153 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3154 function for BDB 4.3.
3156 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3158 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3159 the sources for PCRE have been re-arranged and more files are now
3162 PH/15 The code I had for printing potentially long long variables in PH/11
3163 above was not the best (it lost precision). The length of off_t variables
3164 is now inspected at build time, and an appropriate printing format (%ld
3165 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3166 to be "long long int" or "long int". This is needed for the internal
3167 formatting function string_vformat().
3169 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3170 the configuration file to be ":syslog", then the script "guesses" where
3171 the logs files are, rather than using the compiled in default. In our
3172 case the guess is not the same as the compiled default, so the script
3173 suddenly stopped working when I started to use syslog. The patch checks
3174 to see if log_file_path is "". If so, it attempts to read it from exim
3175 with no configuration file to get the compiled in version, before it
3176 falls back to the previous guessing code."
3178 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3179 implementing BATV in an Exim configuration. See NewStuff for the gory
3182 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3183 Makefile that are specific to HP-UX.
3185 PH/18 If the "use_postmaster" option was set for a recipient callout together
3186 with the "random" option, the postmaster address was used as the MAIL
3187 FROM address for the random test, but not for the subsequent recipient
3188 test. It is now used for both.
3190 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3191 patch removes a few documentation additions to RFC 3028, because the
3192 latest draft now contains them. It adds the new en;ascii-case comparator
3193 and a new error check for 8bit text in MIME parts. Comparator and
3194 require names are now matched exactly. I enabled the subaddress
3195 extension, but it is not well tested yet (read: it works for me)."
3197 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3198 rework some of the code of TK/09 above to avoid the hardwired use of
3199 "%lld" and "long long". Replaced the call to snprintf() with a call to
3202 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3203 records point to non-existent hosts", "retry timeout exceeded", and
3204 "retry time not reached for any host after a long failure period".
3206 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3207 experimental DomainKeys support:
3209 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3210 (2) On an error such as an illegally used "control", the wrong name for
3211 the control was given.
3213 These problems did NOT occur unless DomainKeys support was compiled.
3215 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3217 PH/24 Added ${if match_ip condition.
3219 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3220 databases so that it will be absolutely obvious if a crash occurs in the
3221 DB library. This is a regular occurrence (often caused by mis-matched
3224 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3225 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3226 picked up on a user's system that detects such things. There doesn't seem
3227 to be a gcc warning option for this - only an attribute that has to be
3228 put on the function's prototype. It seems that in Fedora Core 4 they have
3229 set this on a number of new functions. No doubt there will be more in due
3232 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3233 specify a transport. However, if an address that was verified by such a
3234 router was the subject of a callout, Exim crashed because it tried to
3235 read the rcpt_include_affixes from the non-existent transport. Now it
3236 just assumes that the setting of that option is false. This bug was
3237 introduced by 4.51/PH/31.
3239 PH/28 Changed -d+all to exclude +memory, because that information is very
3240 rarely of interest, but it makes the output a lot bigger. People tend to
3241 do -d+all out of habit.
3243 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3244 code in os-type was giving problems when libc.so lives in lib64, like on
3247 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3248 aren't the modern standard, and it seems that some systems' include files
3249 don't always have them. Exim was already checking for some of the newer
3250 ones like T_AAAA, and defining it itself. I've added checks for all the
3251 record types that Exim uses.
3253 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3254 not automatically generating a new one, as it is supposed to. This
3255 prevented TLS from working. If the file did exist, but contained invalid
3256 data, a new version was generated, as expected. It was only the case of a
3257 non-existent file that was broken.
3259 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3260 with a change in libdomainkeys > 0.64.
3262 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3263 from DNS. If the selector record carries the flag, it now has
3264 precedence over the domain-wide flag.
3266 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3268 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3269 the use of a port name that isn't defined in /etc/services) occurred, the
3270 message was deferred as in a normal delivery, and thus remained on the
3271 spool, instead of being failed because of the mua_wrapper setting. This
3272 is now fixed, and I tidied up some of the mua_wrapper messages at the
3275 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3276 the messages in a hash of arrays rather than using individual hashes.
3277 This is a bit cleaner and results in dramatic memory savings, albeit
3278 at a slight CPU cost.
3280 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3281 as requested by Marc Sherman.
3283 SC/10 Eximstats: added histograms for user specified patterns as requested
3286 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3288 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3289 fopen() in the content-scanning modules that did not already have it.
3295 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3296 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3298 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3300 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3302 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3303 to test Sieve filters that use "vacation".
3305 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3306 that changes the way the GnuTLS parameters are stored in the cache file.
3307 The new format can be generated externally. For backward compatibility,
3308 if the data in the cache doesn't make sense, Exim assumes it has read an
3309 old-format file, and it generates new data and writes a new file. This
3310 means that you can't go back to an older release without removing the
3313 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3314 work if there are any delivery delays because "one_time" forces the
3315 parent to be marked "delivered", so its unseen clone is never tried
3316 again. For this reason, Exim now forbids the simultaneous setting of
3319 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3320 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3321 entry if you want to know the details. The fix, however, neglected to
3322 consider the case when local delivery batching is involved. The test for
3323 "previously delivered" was not happening when checking to see if an
3324 address could be batched with a previous (undelivered) one; under
3325 certain circumstances this could lead to multiple deliveries to the same
3328 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3329 in its include files, and this causes problems building Exim.
3331 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3332 header_syntax) but Exim was just ignoring anything given after a slash.
3333 In particular, this caused confusion with an attempt to use "verify =
3334 reverse_host_lookup/defer_ok". An error is now given when options are
3335 supplied for verify items that do not have them. (Maybe reverse_host_
3336 lookup should have a defer_ok option, but that's a different point.)
3338 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3339 defined by RFC 821) to 2048, because there were problems with some AUTH
3340 commands, and RFC 1869 says the size should be increased for extended
3341 SMTP commands that take arguments.
3343 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3346 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3347 "unknown" error; now it says that the functionality isn't in the binary.
3349 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3350 an address' error message when a string expansion fails (syntax or
3351 whatever). Otherwise the password may appear in the log. Following change
3352 PH/42 below, there is no longer a chance of it appearing in a bounce
3355 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3357 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3358 of its addresses was ever tried. (Bugzilla bug #2.)
3360 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3361 the result incorrectly in the debug output. (It correctly added a newline
3362 to what was transported.)
3364 TF/01 Added $received_time.
3366 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3367 commented out examples of how to interface to a virus scanner and to
3368 SpamAssassin. Also added commented examples of av_scanner and
3369 spamd_address settings.
3371 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3372 and controls are allowed in which ACLs. There were a couple of minor
3373 errors. Some of the entries in the conditions table (which is a table of
3374 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3375 negation of where the condition IS allowed.
3377 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3379 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3380 header file does not have a version number, so I've had to invent a new
3381 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3382 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3383 radiusclient), but it was contributed by a Radius user.
3385 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3386 files or directories, for OpenSSL.
3388 PH/19 When an Exim process that is running as root has to create an Exim log
3389 file, it does so in a subprocess that runs as exim:exim so as to get the
3390 ownership right at creation (otherwise, other Exim processes might see
3391 the file with the wrong ownership). There was no test for failure of this
3392 fork() call, which would lead to the process getting stuck as it waited
3393 for a non-existent subprocess. Forks do occasionally fail when resources
3394 run out. I reviewed all the other calls to fork(); they all seem to check
3397 PH/20 When checking for unexpected SMTP input at connect time (before writing
3398 the banner), Exim was not dealing correctly with a non-positive return
3399 from the read() function. If the client had disconnected by this time,
3400 the result was a log entry for a synchronization error with an empty
3401 string after "input=" when read() returned zero. If read() returned -1
3402 (an event I could not check), uninitialized data bytes were printed.
3403 There were reports of junk text (parts of files, etc) appearing after
3406 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3408 PH/22 Added support for macro redefinition, and (re)definition in between
3409 driver and ACL definitions.
3411 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3412 forgetting to use the resulting value; it was using the unexpanded value.
3414 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3415 hadn't been configured. The fix is from Juergen Kreileder, who
3416 understands it better than I do:
3418 "Here's what I see happening with three configured cyrus_sasl
3419 authenticators configured (plain, login, cram-md5):
3421 On startup auth_cyrus_sasl_init() gets called for each of these.
3422 This means three calls to sasl_listmech() without a specified mech_list.
3423 => SASL tests which mechs of all available mechs actually work
3424 => three warnings about OTP not working
3425 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3427 With the patch, sasl_listmech() also gets called three times. But now
3428 SASL's mech_list option is set to the server_mech specified in the the
3429 authenticator. Or in other words, the answer from sasl_listmech()
3430 gets limited to just the mech you're testing for (which is different
3432 => the return list contains just 'plain' or 'login', 'cram-md5' or
3433 nothing depending on the value of ob->server_mech.
3435 I've just tested the patch: Authentication still works fine,
3436 unavailable mechs specified in the exim configuration are still
3437 caught, and the auth.log warnings about OTP are gone."
3439 PH/25 When debugging is enabled, the contents of the command line are added
3440 to the debugging output, even when log_selector=+arguments is not
3443 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3444 answer is "GNU", and only if the return is "GNU/something" is the answer
3447 PH/27 $acl_verify_message is now set immediately after the failure of a
3448 verification in an ACL, and so is available in subsequent modifiers. In
3449 particular, the message can be preserved by coding like this:
3451 warn !verify = sender
3452 set acl_m0 = $acl_verify_message
3454 Previously, $acl_verify_message was set only while expanding "message"
3455 and "log_message" when a very denied access.
3457 PH/28 Modified OS/os.c-Linux with
3459 -#ifndef OS_LOAD_AVERAGE
3460 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3462 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3463 nomenclature these days.)
3465 PH/29 Installed patch from the Sieve maintainer that adds the options
3466 sieve_useraddress and sieve_subaddress to the redirect router.
3468 PH/30 In these circumstances:
3469 . Two addresses routed to the same list of hosts;
3470 . First host does not offer TLS;
3471 . First host accepts first address;
3472 . First host gives temporary error to second address;
3473 . Second host offers TLS and a TLS session is established;
3474 . Second host accepts second address.
3475 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3476 and peerdn, if requested) that were in fact used only for the second
3479 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3480 attention to any local part prefix or suffix that was matched by the
3481 router that accepted the address. It now behaves in the same way as it
3482 does for delivery: the affixes are removed from the local part unless
3483 rcpt_include_affixes is set on the transport.
3485 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3486 timeout during the DATA phase of an incoming message.
3488 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3489 applied a patch sanctioned by the Sieve maintainer.
3491 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3492 the uid or gid is negative. A case of a negative gid caused this to be
3493 noticed. The fix allows for either to be negative.
3495 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3496 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3499 PH/36 The change PH/12 above was broken. Fixed it.
3501 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3502 the grounds that routing the same address twice would always produce the
3503 same answer. This might have been true once, but it is certainly no
3504 longer true now. Routing a child address may depend on the previous
3505 routing that produced that child. Some complicated redirection strategies
3506 went wrong when messages had multiple recipients, and made Exim's
3507 behaviour dependent on the order in which the addresses were given.
3509 I have moved the duplicate checking until after the routing is complete.
3510 Exim scans the addresses that are assigned to local and remote
3511 transports, and removes any duplicates. This means that more work will be
3512 done, as duplicates will always all be routed, but duplicates are
3513 presumably rare, so I don't expect this is of any significance.
3515 For deliveries to pipes, files, and autoreplies, the duplicate checking
3516 still happens during the routing process, since they are not going to be
3519 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3520 It corrects a timeout issue with spamd. This is Ian's comment: "The
3521 background is that sometimes spamd either never reads data from a
3522 connection it has accepted, or it never writes response data. The exiscan
3523 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3524 blindly assumes that writes won't block so it may never time out."
3526 PH/39 Allow G after quota size as well as K and M.
3528 PH/40 The value set for $authenticated_id in an authenticator may not contain
3529 binary zeroes or newlines because the value is written to log lines and
3530 to spool files. There was no check on this. Now the value is run through
3531 the string_printing() function so that such characters are converted to
3532 printable escape sequences.
3534 PH/41 $message_linecount is a new variable that contains the total number of
3535 lines in the message. Compare $body_linecount, which is the count for the
3538 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3539 bounce and delay warning messages, except in certain special cases, which
3542 (a) An SMTP error message from a remote host;
3543 (b) A message specified in a :fail: redirection;
3544 (c) A message specified in a "fail" command in a system filter;
3545 (d) A message specified in a FAIL return from the queryprogram router;
3546 (e) A message specified by the cannot_route_message router option.
3548 In these cases only, Exim does include the error details in bounce and
3549 warning messages. There are also a few cases where bland messages such
3550 as "unrouteable address" or "local delivery error" are given.
3552 PH/43 $value is now also set for the "else" part of a ${run expansion.
3554 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3555 being worked on, but at least Exim now implements the latest version to
3558 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3559 process to complete was treated as a delivery failure, a timeout while
3560 writing the message to the pipe was logged, but erroneously treated as a
3561 successful delivery. Such timeouts include transport filter timeouts. For
3562 consistency with the overall process timeout, these timeouts are now
3563 treated as errors, giving rise to delivery failures by default. However,
3564 there is now a new Boolean option for the pipe transport called
3565 timeout_defer, which, if set TRUE, converts the failures into defers for
3566 both kinds of timeout. A transport filter timeout is now identified in
3569 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3570 systems where "make" and "gmake" are different, calling "gmake" at top
3571 level broke things. I've arranged for the value of $(MAKE) to be passed
3572 from the Makefile to this script so that it can call the same version of
3576 A note about Exim versions 4.44 and 4.50
3577 ----------------------------------------
3579 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3580 changes of various kinds. As a consequence, a big documentation update was
3581 needed. This delayed the release for rather longer than seemed good, especially
3582 in the light of a couple of (minor) security issues. Therefore, the changes
3583 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3584 release. So 4.44 and 4.50 are in effect two different branches that both start
3587 I have left the 4.50 change log unchanged; it contains all the changes since
3588 4.43. The change log for 4.44 is below; many of its items are identical to
3589 those for 4.50. This seems to be the most sensible way to preserve the
3590 historical information.
3596 1. Minor wording change to the doc/README.SIEVE file.
3598 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3599 computation of the current number of files was incorrect.
3601 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3602 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3605 4. Give more explanation in the error message when the command for a transport
3606 filter fails to execute.
3608 5. There are several places where Exim runs a non-Exim command in a
3609 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3610 was being done only for the command run by the queryprogram router. It is
3611 now done for all such subprocesses. The other cases are: ${run, transport
3612 filters, and the commands run by the lmtp and pipe transports.
3614 6. Added CONFIGURE_GROUP build-time option.
3616 7. Some older OS have a limit of 256 on the maximum number of file
3617 descriptors. Exim was using setrlimit() to set 1000 as a large value
3618 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3619 systems. I've change it so that if it can't get 1000, it tries for 256.
3621 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3622 was an oversight, and furthermore, ever since the addition of extra
3623 controls (e.g. 4.43/32), the checks on when to allow different forms of
3624 "control" were broken. There should now be diagnostics for all cases when a
3625 control that does not make sense is encountered.
3627 9. Added the /retain_sender option to "control=submission".
3629 10. $recipients is now available in the predata ACL (oversight).
3631 11. Tidy the search cache before the fork to do a delivery from a message
3632 received from the command line. Otherwise the child will trigger a lookup
3633 failure and thereby defer the delivery if it tries to use (for example) a
3634 cached ldap connection that the parent has called unbind on.
3636 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3637 of $address_data from the recipient verification was clobbered by the
3638 sender verification.
3640 13. The value of address_data from a sender verification is now available in
3641 $sender_address_data in subsequent conditions in the ACL statement.
3643 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3645 15. Added a new option "connect=<time>" to callout options, to set a different
3648 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3649 was its contents. (It was OK if the option was not defined at all.)
3651 17. A "Completed" log line is now written for messages that are removed from
3652 the spool by the -Mrm option.
3654 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3655 information about exactly what failed.
3657 19. Added -dd to debug only the daemon process.
3659 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3660 handles timeouts, both on the server side and network timeouts. Renamed the
3661 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3663 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3664 It is now set to "smtps".
3666 22. $host_address is now set to the target address during the checking of
3667 ignore_target_hosts.
3669 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3670 being passed; this would have caused $sender_host_name to have been used if
3671 matching the list had actually called for a host name (not very likely,
3672 since this list is usually IP addresses). A host name is now passed as
3675 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3676 code that specifies a non-restarting handler (typically sigaction() in
3677 modern systems) in an attempt to fix a rare and obscure crash bug.
3679 25. Narrowed the window for a race in the daemon that could cause it to ignore
3680 SIGCHLD signals. This is not a major problem, because they are used only to
3681 wake it up if nothing else does.
3683 26. A malformed maildirsize file could cause Exim to calculate negative values
3684 for the mailbox size or file count. Odd effects could occur as a result.
3685 The maildirsize information is now recalculated if the size or filecount
3688 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3689 support for a long time. Removed HAVE_SYS_VFS_H.
3691 28. Installed the latest version of exipick from John Jetmore.
3693 29. In an address list, if the pattern was not a regular expression, an empty
3694 subject address (from a bounce message) matched only if the pattern was an
3695 empty string. Non-empty patterns were not even tested. This was the wrong
3696 because it is perfectly reasonable to use an empty address as part of a
3697 database query. An empty address is now tested by patterns that are
3698 lookups. However, all the other forms of pattern expect the subject to
3699 contain a local part and a domain, and therefore, for them, an empty
3700 address still always fails if the pattern is not itself empty.
3702 30. Exim went into a mad DNS loop when attempting to do a callout where the
3703 host was specified on an smtp transport, and looking it up yielded more
3704 than one IP address.
3706 31. Re-factored the code for checking spool and log partition space into a
3707 function that finds that data and another that does the check. The former
3708 is then used to implement four new variables: $spool_space, $log_space,
3709 $spool_inodes, and $log_inodes.
3711 32. The RFC2047 encoding function was originally intended for short strings
3712 such as real names; it was not keeping to the 75-character limit for
3713 encoded words that the RFC imposes. It now respects the limit, and
3714 generates multiple encoded words if necessary. To be on the safe side, I
3715 have increased the buffer size for the ${rfc2047: expansion operator from
3718 33. It is now permitted to omit both strings after an "if" condition; if the
3719 condition is true, the result is "true". As before, when the second string
3720 is omitted, a false condition yields an empty string. This makes it less
3721 cumbersome to write custom ACL and router conditions.
3723 34. Failure to deliver a bounce message always caused it to be frozen, even if
3724 there was an errors_to setting on the router. The errors_to setting is now
3727 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3728 canonical form (fully expanded) before being placed in
3729 $sender_host_address.
3731 36. The table in the code that translates DNS record types into text (T_A to
3732 "A" for instance) was missing entries for NS and CNAME. It is just possible
3733 that this could have caused confusion if both these types were looked up
3734 for the same domain, because the text type is used as part of Exim's
3735 per-process caching. But the chance of anyone hitting this buglet seems
3738 37. The dnsdb lookup has been extended in a number of ways.
3740 (1) There is a new type, "zns", which walks up the domain tree until it
3741 finds some nameserver records. It should be used with care.
3743 (2) There is a new type, "mxh", which is like "mx" except that it returns
3744 just the host names, not the priorities.
3746 (3) It is now possible to give a list of domains (or IP addresses) to be
3747 looked up. The behaviour when one of the lookups defers can be
3748 controlled by a keyword.
3750 (4) It is now possible to specify the separator character for use when
3751 multiple records are returned.
3753 38. The dnslists ACL condition has been extended: it is now possible to supply
3754 a list of IP addresses and/or domains to be looked up in a particular DNS
3757 39. Added log_selector=+queue_time_overall.
3759 40. When running the queue in the test harness, wait just a tad after forking a
3760 delivery process, to get repeatability of debugging output.
3762 41. Include certificate and key file names in error message when GnuTLS fails
3763 to set them up, because the GnuTLS error message doesn't include the name
3764 of the failing file when there is a problem reading it.
3766 42. Allow both -bf and -bF in the same test run.
3768 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3770 44. The "Exiscan patch" is now merged into the mainline Exim source.
3772 45. Sometimes the final signoff response after QUIT could fail to get
3773 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3774 < 0 before doing a fflush(). This bug looks as though it goes back to the
3775 introduction of TLS in release 3.20, but "sometimes" must have been rare
3776 because the tests only now provoked it.
3778 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3779 (this can affect the format of dates).
3781 47. exim_tidydb, when checking for the continued existence of a message for
3782 which it has found a message-specific retry record, was not finding
3783 messages that were in split spool directories. Consequently, it was
3784 deleting retry records that should have stayed in existence.
3786 48. Steve fixed some bugs in eximstats.
3788 49. The SPA authentication driver was not abandoning authentication and moving
3789 on to the next authenticator when an expansion was forced to fail,
3790 contradicting the general specification for all authenticators. Instead it
3791 was generating a temporary error. It now behaves as specified.
3793 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3794 (the order specifies the preference for clients). The order is now AES256,
3795 AES128, 3DES, ARCFOUR128.
3797 51. Small patch to Sieve code - explicitly set From: when generating an
3800 52. Exim crashed if a remote delivery caused a very long error message to be
3801 recorded - for instance if somebody sent an entire SpamAssassin report back
3802 as a large number of 550 error lines. This bug was coincidentally fixed by
3803 increasing the size of one of Exim's internal buffers (big_buffer) that
3804 happened as part of the Exiscan merge. However, to be on the safe side, I
3805 have made the code more robust (and fixed the comments that describe what
3808 53. Now that there can be additional text after "Completed" in log lines (if
3809 the queue_time_overall log selector is set), a one-byte patch to exigrep
3810 was needed to allow it to recognize "Completed" as not the last thing in
3813 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3814 patch that reportedly fixes this has been added. I am not expert enough to
3815 create a test for it. This is what the patch creator wrote:
3817 "I found a little strange behaviour of ldap code when working with
3818 Windows 2003 AD Domain, where users was placed in more than one
3819 Organization Units. When I tried to give exim partial DN, the exit code
3820 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3821 But simultaneously result of request was absolutely normal ldap result,
3822 so I produce this patch..."
3824 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3825 REFERENCE, so I have modified the code to exclude the patch when that macro
3828 55. Some experimental protocols are using DNS PTR records for new purposes. The
3829 keys for these records are domain names, not reversed IP addresses. The
3830 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3831 leaves it alone. Component reversal etc. now happens only for IP addresses.
3834 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3836 57. Double the size of the debug message buffer (to 2048) so that more of very
3837 long debug lines gets shown.
3839 58. The exicyclog utility now does better if the number of log files to keep
3840 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3842 59. Two changes related to the smtp_active_hostname option:
3844 (1) $smtp_active_hostname is now available as a variable.
3845 (2) The default for smtp_banner uses $smtp_active_hostname instead
3846 of $primary_hostname.
3848 60. The host_aton() function is supposed to be passed a string that is known
3849 to be a valid IP address. However, in the case of IPv6 addresses, it was
3850 not checking this. This is a hostage to fortune. Exim now panics and dies
3851 if the condition is not met. A case was found where this could be provoked
3852 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3853 components; fortuitously, this particular loophole had already been fixed
3854 by change 4.50/55 above.
3856 If there are any other similar loopholes, the new check in host_aton()
3857 itself should stop them being exploited. The report I received stated that
3858 data on the command line could provoke the exploit when Exim was running as
3859 exim, but did not say which command line option was involved. All I could
3860 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3861 running as the user.
3864 61. There was a buffer overflow vulnerability in the SPA authentication code
3865 (which came originally from the Samba project). I have added a test to the
3866 spa_base64_to_bits() function which I hope fixes it.
3869 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3870 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3872 63. The daemon start-up calls getloadavg() while still root for those OS that
3873 need the first call to be done as root, but it missed one case: when
3874 deliver_queue_load_max is set with deliver_drop_privilege. This is
3875 necessary for the benefit of the queue runner, because there is no re-exec
3876 when deliver_drop_privilege is set.
3878 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3879 This has been fixed.
3881 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3882 was in use, was not putting the data itself into the right store pool;
3883 consequently, it could be overwritten for a subsequent message in the same
3884 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3887 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3889 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3890 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3891 the function were treating the return as a boolean value, which happened to
3892 work because 0=false and not-0=true, but is not correct code.
3894 68. The host_aton() function was not handling scoped IPv6 addresses (those
3895 with, for example, "%eth0" on the end) correctly.
3897 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3898 negated items (that is, ~something) in unsigned ints. Some compilers
3899 apparently mutter when there is no cast.
3901 70. If an address verification called from an ACL failed, and did not produce a
3902 user-specific message (i.e. there was only a "system" message), nothing was
3903 put in $acl_verify_message. In this situation, it now puts the system
3906 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3907 session; change 4.31/43 added the unwanted input to the log line - except
3908 that it did not do this in the start of session case. It now does.
3910 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3911 This is wrong and can cause the other end to generate a synchronization
3912 error if it is another Exim or anything else that does the synchronization
3913 check. A QUIT command is no longer sent after a timeout.
3915 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3916 during host lookups.
3918 74. The defer_ok option of callout verification was not working if it was used
3919 when verifying addresses in header lines, that is, for this case:
3921 verify = header_sender/callout=defer_ok
3923 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3924 those file descriptors could be used for SMTP connections. If anything
3925 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3926 could be sent to the SMTP client, causing chaos. The daemon now opens
3927 stdin, stdout, and stderr to /dev/null when it puts itself into the
3930 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3931 log by default. The user can override this with suitable Perl magic.
3933 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3934 the log message when discard triggers, was not working for the DATA ACL or
3935 for the non-SMTP ACL.
3937 78. Error message wording change in sieve.c.
3939 79. If smtp_accept_max_per_host was set, the number of connections could be
3940 restricted to fewer than expected, because the daemon was trying to set up
3941 a new connection before checking whether the processes handling previous
3942 connections had finished. The check for completed processes is now done
3943 earlier. On busy systems, this bug wouldn't be noticed because something
3944 else would have woken the daemon, and it would have reaped the completed
3947 80. If a message was submitted locally by a user whose login name contained one
3948 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3949 It caused a spool format error. I have fixed the spool reading code. A
3950 related problem was that the "from" clause in the Received: line became
3951 illegal because of the space(s). It is now covered by ${quote_local_part.
3953 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3956 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3958 83. Patch from Sieve maintainer to fix unterminated string problem in
3959 "vacation" handling.
3961 84. Some minor changes to the Linux configuration files to help with other
3962 OS variants using glibc.
3964 85. One more patch for Sieve to update vacation handling to latest spec.
3967 ----------------------------------------------------
3968 See the note above about the 4.44 and 4.50 releases.
3969 ----------------------------------------------------
3975 1. Change 4.43/35 introduced a bug that caused file counts to be
3976 incorrectly computed when quota_filecount was set in an appendfile
3979 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3980 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3983 3. Give more explanation in the error message when the command for a transport
3984 filter fails to execute.
3986 4. There are several places where Exim runs a non-Exim command in a
3987 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3988 was being done only for the command run by the queryprogram router. It is
3989 now done for all such subprocesses. The other cases are: ${run, transport
3990 filters, and the commands run by the lmtp and pipe transports.
3992 5. Some older OS have a limit of 256 on the maximum number of file
3993 descriptors. Exim was using setrlimit() to set 1000 as a large value
3994 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3995 systems. I've change it so that if it can't get 1000, it tries for 256.
3997 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3998 was an oversight, and furthermore, ever since the addition of extra
3999 controls (e.g. 4.43/32), the checks on when to allow different forms of
4000 "control" were broken. There should now be diagnostics for all cases when a
4001 control that does not make sense is encountered.
4003 7. $recipients is now available in the predata ACL (oversight).
4005 8. Tidy the search cache before the fork to do a delivery from a message
4006 received from the command line. Otherwise the child will trigger a lookup
4007 failure and thereby defer the delivery if it tries to use (for example) a
4008 cached ldap connection that the parent has called unbind on.
4010 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4011 of $address_data from the recipient verification was clobbered by the
4012 sender verification.
4014 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4015 was its contents. (It was OK if the option was not defined at all.)
4017 11. A "Completed" log line is now written for messages that are removed from
4018 the spool by the -Mrm option.
4020 12. $host_address is now set to the target address during the checking of
4021 ignore_target_hosts.
4023 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4024 being passed; this would have caused $sender_host_name to have been used if
4025 matching the list had actually called for a host name (not very likely,
4026 since this list is usually IP addresses). A host name is now passed as
4029 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4030 code that specifies a non-restarting handler (typically sigaction() in
4031 modern systems) in an attempt to fix a rare and obscure crash bug.
4033 15. Narrowed the window for a race in the daemon that could cause it to ignore
4034 SIGCHLD signals. This is not a major problem, because they are used only to
4035 wake it up if nothing else does.
4037 16. A malformed maildirsize file could cause Exim to calculate negative values
4038 for the mailbox size or file count. Odd effects could occur as a result.
4039 The maildirsize information is now recalculated if the size or filecount
4042 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4043 support for a long time. Removed HAVE_SYS_VFS_H.
4045 18. Updated exipick to current release from John Jetmore.
4047 19. Allow an empty sender to be matched against a lookup in an address list.
4048 Previously the only cases considered were a regular expression, or an
4051 20. Exim went into a mad DNS lookup loop when doing a callout where the
4052 host was specified on the transport, if the DNS lookup yielded more than
4055 21. The RFC2047 encoding function was originally intended for short strings
4056 such as real names; it was not keeping to the 75-character limit for
4057 encoded words that the RFC imposes. It now respects the limit, and
4058 generates multiple encoded words if necessary. To be on the safe side, I
4059 have increased the buffer size for the ${rfc2047: expansion operator from
4062 22. Failure to deliver a bounce message always caused it to be frozen, even if
4063 there was an errors_to setting on the router. The errors_to setting is now
4066 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4067 canonical form (fully expanded) before being placed in
4068 $sender_host_address.
4070 24. Updated eximstats to version 1.33
4072 25. Include certificate and key file names in error message when GnuTLS fails
4073 to set them up, because the GnuTLS error message doesn't include the name
4074 of the failing file when there is a problem reading it.
4076 26. Expand error message when OpenSSL has problems setting up cert/key files.
4079 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4080 (this can affect the format of dates).
4082 28. exim_tidydb, when checking for the continued existence of a message for
4083 which it has found a message-specific retry record, was not finding
4084 messages that were in split spool directories. Consequently, it was
4085 deleting retry records that should have stayed in existence.
4087 29. eximstats updated to version 1.35
4088 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4089 1.35 - bugfix such that pie charts by volume are generated correctly
4091 30. The SPA authentication driver was not abandoning authentication and moving
4092 on to the next authenticator when an expansion was forced to fail,
4093 contradicting the general specification for all authenticators. Instead it
4094 was generating a temporary error. It now behaves as specified.
4096 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4097 (the order specifies the preference for clients). The order is now AES256,
4098 AES128, 3DES, ARCFOUR128.
4100 31. Small patch to Sieve code - explicitly set From: when generating an
4103 32. Exim crashed if a remote delivery caused a very long error message to be
4104 recorded - for instance if somebody sent an entire SpamAssassin report back
4105 as a large number of 550 error lines. This bug was coincidentally fixed by
4106 increasing the size of one of Exim's internal buffers (big_buffer) that
4107 happened as part of the Exiscan merge. However, to be on the safe side, I
4108 have made the code more robust (and fixed the comments that describe what
4111 33. Some experimental protocols are using DNS PTR records for new purposes. The
4112 keys for these records are domain names, not reversed IP addresses. The
4113 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4114 leaves it alone. Component reversal etc. now happens only for IP addresses.
4117 34. The host_aton() function is supposed to be passed a string that is known
4118 to be a valid IP address. However, in the case of IPv6 addresses, it was
4119 not checking this. This is a hostage to fortune. Exim now panics and dies
4120 if the condition is not met. A case was found where this could be provoked
4121 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4122 components; fortuitously, this particular loophole had already been fixed
4123 by change 4.50/55 or 4.44/33 above.
4125 If there are any other similar loopholes, the new check in host_aton()
4126 itself should stop them being exploited. The report I received stated that
4127 data on the command line could provoke the exploit when Exim was running as
4128 exim, but did not say which command line option was involved. All I could
4129 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4130 running as the user.
4133 35. There was a buffer overflow vulnerability in the SPA authentication code
4134 (which came originally from the Samba project). I have added a test to the
4135 spa_base64_to_bits() function which I hope fixes it.
4138 36. The daemon start-up calls getloadavg() while still root for those OS that
4139 need the first call to be done as root, but it missed one case: when
4140 deliver_queue_load_max is set with deliver_drop_privilege. This is
4141 necessary for the benefit of the queue runner, because there is no re-exec
4142 when deliver_drop_privilege is set.
4144 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4145 was in use, was not putting the data itself into the right store pool;
4146 consequently, it could be overwritten for a subsequent message in the same
4147 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4150 38. Sometimes the final signoff response after QUIT could fail to get
4151 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4152 < 0 before doing a fflush(). This bug looks as though it goes back to the
4153 introduction of TLS in release 3.20, but "sometimes" must have been rare
4154 because the tests only now provoked it.
4160 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4161 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4162 Now it returns an integer. A number of calls were still expecting a T/F
4163 return. Fortuitously, in all cases, the tests worked in OK situations,
4164 which is the norm. However, things would have gone wrong on any write
4165 failures on the smtp file descriptor. This function is used when sending
4166 messages over SMTP and also when doing verify callouts.
4168 2. When Exim is called to do synchronous delivery of a locally submitted
4169 message (the -odf or -odi options), it no longer closes stderr before doing
4172 3. Implemented the mua_wrapper option.
4174 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4176 5. Implemented the functions header_remove(), header_testname(),
4177 header_add_at_position(), and receive_remove_recipient(), and exported them
4180 6. If an ACL "warn" statement specified the addition of headers, Exim already
4181 inserted X-ACL-Warn: at the start if there was no header name. However, it
4182 was not making this test for the second and subsequent header lines if
4183 there were newlines in the string. This meant that an invalid header could
4184 be inserted if Exim was badly configured.
4186 7. Allow an ACL "warn" statement to add header lines at the start or after all
4187 the Received: headers, as well as at the end.
4189 8. Added the rcpt_4xx retry error code.
4191 9. Added postmaster_mailfrom=xxx to callout verification option.
4193 10. Added mailfrom=xxxx to the callout verification option, for verify=
4196 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4197 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4199 12. Inserted some casts to stop certain compilers warning when using pointer
4200 differences as field lengths or precisions in printf-type calls (mostly
4201 affecting debugging statements).
4203 13. Added optional readline() support for -be (dynamically loaded).
4205 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4206 same clock tick as a message's arrival, so that its received time was the
4207 same as the "first fail" time on the retry record, and that message
4208 remained on the queue past the ultimate address timeout, every queue runner
4209 would try a delivery (because it was past the ultimate address timeout) but
4210 after another failure, the ultimate address timeout, which should have then
4211 bounced the address, did not kick in. This was a "< instead of <=" error;
4212 in most cases the first failure would have been in the next clock tick
4213 after the received time, and all would be well.
4215 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4216 being recognized when the domain list was tested by the match_domain
4217 condition in an expansion string.
4219 16. Added the ${str2b64: operator.
4221 17. Exim was always calling setrlimit() to set a large limit for the number of
4222 processes, without checking whether the existing limit was already
4223 adequate. (It did check for the limit on file descriptors.) Furthermore,
4224 errors from getrlimit() and setrlimit() were being ignored. Now they are
4225 logged to the main and panic logs, but Exim does carry on, to try to do its
4226 job under whatever limits there are.
4228 18. Imported PCRE 5.0.
4230 19. Trivial typo in log message " temporarily refused connection" (the leading
4233 20. If the log selector return_path_on_delivery was set and an address was
4234 redirected to /dev/null, the delivery process crashed because it assumed
4235 that a return path would always be set for a "successful" delivery. In this
4236 case, the whole delivery is bypassed as an optimization, and therefore no
4239 21. Internal re-arrangement: the function for sending a challenge and reading
4240 a response while authentication was assuming a zero-terminated challenge
4241 string. It's now changed to take a pointer and a length, to allow for
4242 binary data in such strings.
4244 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4246 23. Exim was not respecting finduser_retries when seeking the login of the
4247 uid under which it was called; it was always trying 10 times. (The default
4248 setting of finduser_retries is zero.) Also, it was sleeping after the final
4249 failure, which is pointless.
4251 24. Implemented tls_on_connect_ports.
4253 25. Implemented acl_smtp_predata.
4255 26. If the domain in control=submission is set empty, Exim assumes that the
4256 authenticated id is a complete email address when it generates From: or
4257 Sender: header lines.
4259 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4260 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4261 chown and chgrp in /bin and hostname in /usr/bin.
4263 28. Exim was keeping the "process log" file open after each use, just as it
4264 does for the main log. This opens the possibility of it remaining open for
4265 long periods when the USR1 signal hits a daemon. Occasional processlog
4266 errors were reported, that could have been caused by this. Anyway, it seems
4267 much more sensible not to leave this file open at all, so that is what now
4270 29. The long-running daemon process does not normally write to the log once it
4271 has entered its main loop, and it closes the log before doing so. This is
4272 so that log files can straightforwardly be renamed and moved. However,
4273 there are a couple of unusual error situations where the daemon does write
4274 log entries, and I had neglected to close the log afterwards.
4276 30. The text of an SMTP error response that was received during a remote
4277 delivery was being truncated at 512 bytes. This is too short for some of
4278 the long messages that one sometimes sees. I've increased the limit to
4281 31. It is now possible to make retry rules that apply only when a message has a
4282 specific sender, in particular, an empty sender.
4284 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4285 it possible to be selective about when SMTP synchronization is enforced.
4287 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4289 32. Implemented hosts_connection_nolog.
4291 33. Added an ACL for QUIT.
4293 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4296 35. Added mailbox_size and mailbox_filecount to appendfile.
4298 36. Added control = no_multiline_responses to ACLs.
4300 37. There was a bug in the logic of the code that waits for the clock to tick
4301 in the case where the clock went backwards by a substantial amount such
4302 that the microsecond fraction of "now" was more than the microsecond
4303 fraction of "then" (but the whole seconds number was less).
4305 38. Added support for the libradius Radius client library this is found on
4306 FreeBSD (previously only the radiusclient library was supported).
4312 1. When certain lookups returned multiple values in the form name=value, the
4313 quoting of the values was not always being done properly. Specifically:
4314 (a) If the value started with a double quote, but contained no whitespace,
4316 (b) If the value contained whitespace other than a space character (i.e.
4317 tabs or newlines or carriage returns) it was not quoted.
4318 This fix has been applied to the mysql and pgsql lookups by writing a
4319 separate quoting function and calling it from the lookup code. The fix
4320 should probably also be applied to nisplus, ibase and oracle lookups, but
4321 since I cannot test any of those, I have not disturbed their existing code.
4323 2. A hit in the callout cache for a specific address caused a log line with no
4324 reason for rejecting RCPT. Now it says "Previous (cached) callout
4325 verification failure".
4327 3. There was an off-by-one bug in the queryprogram router. An over-long
4328 return line was truncated at 256 instead of 255 characters, thereby
4329 overflowing its buffer with the terminating zero. As well as fixing this, I
4330 have increased the buffer size to 1024 (and made a note to document this).
4332 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4333 when Exim is waiting for an SMTP response from a remote server, Exim
4334 restarts its select() call on the socket, thereby resetting its timeout.
4335 This is not a problem when such interrupts are rare. Somebody set up a cron
4336 job to run exiwhat every 2 minutes, which is less than the normal select()
4337 timeout (5 or 10 minutes). This meant that the select() timeout never
4338 kicked in because it was always reset. I have fixed this by comparing the
4339 time when an interrupt arrives with the time at the start of the first call
4340 to select(). If more time than the timeout has elapsed, the interrupt is
4341 treated as a timeout.
4343 5. Some internal re-factoring in preparation for the addition of Sieve
4344 extensions (by MH). In particular, the "personal" test is moved to a
4345 separate function, and given an option for scanning Cc: and Bcc: (which is
4346 not set for Exim filters).
4348 6. When Exim created an email address using the login of the caller as the
4349 local part (e.g. when creating a From: or Sender: header line), it was not
4350 quoting the local part when it contained special characters such as @.
4352 7. Installed new OpenBSD configuration files.
4354 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4355 try to make them clearer.
4357 9. Callout options, other than the timeout value, were being ignored when
4358 verifying sender addresses in header lines. For example, when using
4360 verify = header_sender/callout=no_cache
4362 the cache was (incorrectly) being used.
4364 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4365 only the Cygwin environment.
4367 11. When return_path_on_delivery was set as a log selector, if different remote
4368 addresses in the same message used different return paths and parallel
4369 remote delivery occurred, the wrong values would sometimes be logged.
4370 (Whenever a remote delivery process finished, the return path value from
4371 the most recently started remote delivery process was logged.)
4373 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4374 lines when AUTH and/or TLS are in use. This is the "received protocol"
4375 field. Exim used to use "asmtp" for authenticated SMTP, without any
4376 indication (in the protocol name) for TLS use. Now it follows the RFC and
4377 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4378 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4379 names appear in log lines as well as in Received: header lines.
4381 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4382 extensions, and comparison tests, and to fix some bugs.
4384 14. Changes to the "personal" filter test:
4386 (1) The test was buggy in that it was just doing the equivalent of
4387 "contains" tests on header lines. For example, if a user's address was
4388 anne@some.where, the "personal" test would incorrectly be true for
4390 To: susanne@some.where
4392 This test is now done by extracting each address from the header in turn,
4393 and checking the entire address. Other tests that are part of "personal"
4394 are now done using regular expressions (for example, to check local parts
4395 of addresses in From: header lines).
4397 (2) The list of non-personal local parts in From: addresses has been
4398 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4399 taken from the Sieve specification recommendations.
4401 (3) If the message contains any header line starting with "List-" it is
4402 treated as non-personal.
4404 (4) The test for "circular" in the Subject: header line has been removed
4405 because it now seems ill-conceived.
4407 15. Minor typos in src/EDITME comments corrected.
4409 16. Installed latest exipick from John Jetmore.
4411 17. If headers_add on a router specified a text string that was too long for
4412 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4413 of string_sprintf() is now avoided.
4415 18. $message_body_size was not set (it was always zero) when running the DATA
4416 ACL and the local_scan() function.
4418 19. For the "mail" command in an Exim filter, no default was being set for
4419 the once_repeat time, causing a random time value to be used if "once" was
4420 specified. (If the value happened to be <= 0, no repeat happened.) The
4421 default is now 0s, meaning "never repeat". The "vacation" command was OK
4422 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4423 (I found it when inspecting the code).
4425 20. There is now an overall timeout for performing a callout verification. It
4426 defaults to 4 times the callout timeout, which applies to individual SMTP
4427 commands during the callout. The overall timeout applies when there is more
4428 than one host that can be tried. The timeout is checked before trying the
4429 next host. This prevents very long delays if there are a large number of
4430 hosts and all are timing out (e.g. when the network connections are timing
4431 out). The value of the overall timeout can be changed by specifying an
4432 additional sub-option for "callout", called "maxwait". For example:
4434 verify = sender/callout=5s,maxwait=20s
4436 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4437 to the end before writing, but this should make it even safer).
4439 22. Exim was forgetting that it had advertised PIPELINING for the second and
4440 subsequent messages on an SMTP connection. It was also not resetting its
4441 memory on STARTTLS and an internal HELO.
4443 23. When Exim logs an SMTP synchronization error within a session, it now
4444 records whether PIPELINING has been advertised or not.
4446 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4447 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4448 rather than long int.
4450 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4452 26. Added the never_mail option to autoreply.
4458 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4459 crash if the getsockname() call failed; this can happen if a connection is
4460 closed very soon after it is established. The problem was simply in the
4461 order in which certain operations were done, causing Exim to try to write
4462 to the SMTP stream before it had set up the file descriptor. The bug has
4463 been fixed by making things happen in the correct order.
4469 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4470 before the connection was closed, thus losing the rejection response.
4472 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4473 some early Solaris releases, but causes trouble in current releases where
4474 socklen_t is defined.
4476 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4479 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4482 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4483 that releasing the top of it at the end releases what was used for sub-
4484 expansions (unless the block got too big). However, discard this block if
4485 the first thing is a variable or header, so that we can use its block when
4486 it is dynamic (useful for very large $message_headers, for example).
4488 6. Lookups now cache *every* query, not just the most recent. A new, separate
4489 store pool is used for this. It can be recovered when all lookup caches are
4490 flushed. Lookups now release memory at the end of their result strings.
4491 This has involved some general refactoring of the lookup sources.
4493 7. Some code has been added to the store_xxx() functions to reduce the amount
4494 of flapping under certain conditions.
4496 8. log_incoming_interface used to affect only the <= reception log lines. Now
4497 it causes the local interface and port to be added to several more SMTP log
4498 lines, for example "SMTP connection from", and rejection lines.
4500 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4502 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4504 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4505 could be overwritten at the end of the current message (or the start of a
4506 new message if it was set in a HELO ACL). The value is now preserved for
4507 the duration of the SMTP connection.
4509 12. If a transport had a headers_rewrite setting, and a matching header line
4510 contained an unqualified address, that address was qualified, even if it
4511 did not match any rewriting rules. The underlying bug was that the values
4512 of the flags that permit the existence of unqualified sender and recipient
4513 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4514 non-local messages, and by -bnq for local messages) were not being
4515 preserved with the message after it was received.
4517 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4518 "next input=" as part of the text comprising the host identity instead of
4519 the correct text. The code was using the same buffer for two different
4520 strings. However, depending on which order the printing function evaluated
4521 its arguments, the bug did not always show up. Under Linux, for example, my
4522 test suite worked just fine.
4524 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4525 doesn't work with some older versions of Perl. It has been changed to "my",
4526 which in any case is probably the better facility to use.
4528 15. A really picky compiler found some instances of statements for creating
4529 error messages that either had too many or two few arguments for the format
4532 16. The size of the buffer for calls to the DNS resolver has been increased
4533 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4534 for addresses that have a lot of PTR records. This alleviates a problem; it
4535 does not fully solve it.
4537 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4538 buffer now truncates the list and logs the incident, which is the same
4539 action as happens when Exim is looking up a host name and its aliases.
4540 Previously in this situation something unpredictable would happen;
4541 sometimes it was "internal error: store_reset failed".
4543 18. If a server dropped the connection unexpectedly when an Exim client was
4544 using GnuTLS and trying to read a response, the client delivery process
4545 crashed while trying to generate an error log message.
4547 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4548 string, for example:
4550 warn message = H1: something\nH2: something
4552 the text was added as a single header line from Exim's point of view
4553 though it ended up OK in the delivered message. However, searching for the
4554 second and subsequent header lines using $h_h2: did not work. This has been
4555 fixed. Similarly, if a system filter added multiple headers in this way,
4556 the routers could not see them.
4558 20. Expanded the error message when iplsearch is called with an invalid key to
4559 suggest using net-iplsearch in a host list.
4561 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4562 ACLs are no longer actually imposed (and a message to that effect is
4565 22. If a "gecos" field in a passwd entry contained escaped characters, in
4566 particular, if it contained a \" sequence, Exim got it wrong when building
4567 a From: or a Sender: header from that name. A second bug also caused
4568 incorrect handling when an unquoted " was present following a character
4569 that needed quoting.
4571 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4572 was not being matched caselessly.
4574 24. Arranged for all hyphens in the exim.8 source to be escaped with
4577 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4578 properly. Recipient callout cache records were still being keyed to include
4579 the sender, even when use_sender was set false. This led to far more
4580 callouts that were necessary. The sender is no longer included in the key
4581 when use_sender is false.
4583 26. Added "control = submission" modifier to ACLs.
4585 27. Added the ${base62d: operator to decode base 62 numbers.
4587 28. dnsdb lookups can now access SRV records.
4589 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4590 the configuration file.
4592 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4593 (-v) mode. This makes the output for a verbose queue run more intelligible.
4595 31. Added a use_postmaster feature to recipient callouts.
4597 32. Added the $body_zerocount variable, containing the number of binary zero
4598 bytes in the message body.
4600 33. The time of last modification of the "new" subdirectory is now used as the
4601 "mailbox time last read" when there is a quota error for a maildir
4604 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4606 35. Added +ignore_unknown as a special item in host lists.
4608 36. Code for decoding IPv6 addresses in host lists is now included, even if
4609 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4610 address was recognized as an IP address, but was then not correctly decoded
4611 into binary, causing unexpected and incorrect effects when compared with
4618 1. Very minor rewording of debugging text in manualroute to say "list of
4619 hosts" instead of "hostlist".
4621 2. If verify=header_syntax was set, and a header line with an unqualified
4622 address (no domain) and a large number of spaces between the end of the
4623 name and the colon was received, the reception process suffered a buffer
4624 overflow, and (when I tested it) crashed. This was caused by some obsolete
4625 code that should have been removed. The fix is to remove it!
4627 3. When running in the test harness, delay a bit after writing a bounce
4628 message to get a bit more predictability in the log output.
4630 4. Added a call to search_tidyup() just before forking a reception process. In
4631 theory, someone could use a lookup in the expansion of smtp_accept_max_
4632 per_host which, without the tidyup, could leave open a database connection.
4634 5. Added the variables $recipient_data and $sender_data which get set from a
4635 lookup success in an ACL "recipients" or "senders" condition, or a router
4636 "senders" option, similar to $domain_data and $local_part_data.
4638 6. Moved the writing of debug_print from before to after the "senders" test
4641 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4642 problems for message scanning, either using a data ACL, or using
4643 local_scan() because the Received: header was not generated till after they
4644 were called (in order to set the time as the time of reception completion).
4645 I have revised the way this works. The header is now generated after the
4646 body is received, but before the ACL or local_scan() are called. After they
4647 are run, the timestamp in the header is updated.
4653 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4654 before starting a queue runner without re-exec. This happened only when
4655 deliver_drop_privilege was set or when the Exim user was set to root. The
4656 effect of the bug was that timeouts during subsequent deliveries caused
4657 crashes instead of being properly handled. The handler is now left at its
4658 default (and expected) setting.
4660 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4661 message, again when deliver_drop_privilege is set or Exim is run as root.
4662 The bug described in (1) was not present in this case, but the tidying up
4663 of the other signals was missing. I have made the two cases consistent.
4665 3. The ignore_target_hosts setting on a manualroute router was being ignored
4666 for hosts that were looked up using the /MX notation.
4668 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4671 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4672 operated on the sender address. After changing the $sender_address to <>
4673 for the sender address verify, Exim was re-instated it as the original
4674 (before rewriting) address, but remembering that it had rewritten it, so it
4675 wasn't rewriting it again. This bug also had the effect of breaking the
4676 sender address verification caching when the sender address was rewritten.
4678 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4679 This has been changed so that if the ip literal address matches
4680 ignore_target_hosts, the router declines.
4682 7. Added expansion conditions match_domain, match_address, and match_local_
4683 part (NOT match_host).
4685 8. The placeholder for the Received: header didn't have a length field set.
4687 9. Added code to Exim itself and to exim_lock to test for a specific race
4688 condition that could lead to file corruption when using MBX delivery. The
4689 issue is with the lockfile that is created in /tmp. If this file is removed
4690 after a process has opened it but before that process has acquired a lock,
4691 there is the potential for a second process to recreate the file and also
4692 acquire a lock. This could lead to two Exim processes writing to the file
4693 at the same time. The added code performs the same test as UW imapd; it
4694 checks after acquiring the lock that its file descriptor still refers to
4695 the same named file.
4697 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4698 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4701 11. Added the smtp_active_hostname option. If used, this will typically be made
4702 to depend on the incoming interface address. Because $interface_address is
4703 not set up until the daemon has forked a reception process, error responses
4704 that can happen earlier (such as "too many connections") no longer contain
4707 12. If an expansion in a condition on a "warn" statement fails because a lookup
4708 defers, the "warn" statement is abandoned, and the next ACL statement is
4709 processed. Previously this caused the whole ACL to be aborted.
4711 13. Added the iplsearch lookup type.
4713 14. Added ident_timeout as a log selector.
4715 15. Added tls_certificate_verified as a log selector.
4717 16. Added a global option tls_require_ciphers (compare the smtp transport
4718 option of the same name). This controls incoming TLS connections.
4720 17. I finally figured out how to make tls_require_ciphers do a similar thing
4721 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4722 before starting the TLS session.
4724 18. Tabs are now shown as \t in -bP output.
4726 19. If the log selector return_path_on_delivery was set, Exim crashed when
4727 bouncing a message because it had too many Received: header lines.
4729 20. If two routers both had headers_remove settings, and the first one included
4730 a superfluous trailing colon, the final name in the first list and the
4731 first name in the second list were incorrectly joined into one item (with a
4732 colon in the middle).
4738 1. Added -C and -D options to the exinext utility, mainly to make it easier
4739 to include in the automated testing, but these could be helpful when
4740 multiple configurations are in use.
4742 2. The exinext utility was not formatting the output nicely when there was
4743 an alternate port involved in the retry record key, nor when there was a
4744 message id as well (for retries that were specific to a specific message
4745 and a specific host). It was also confused by IPv6 addresses, because of
4746 the additional colons they contain. I have fixed the IPv4 problem, and
4747 patched it up to do a reasonable job for IPv6.
4749 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4750 delivery, the log line now contains "pipelined" if PIPELINING was used.
4752 4. An SMTP transport process used to panic and die if the bind() call to set
4753 an explicit outgoing interface failed. This has been changed; it is now
4754 treated in the same way as a connect() failure.
4756 5. A reference to $sender_host_name in the part of a conditional expansion
4757 that was being skipped was still causing a DNS lookup. This no longer
4760 6. The def: expansion condition was not recognizing references to header lines
4761 that used bh_ and bheader_.
4763 7. Added the _cache feature to named lists.
4765 8. The code for checking quota_filecount in the appendfile transport was
4766 allowing one more file than it should have been.
4768 9. For compatibility with Sendmail, the command line option
4776 and sets the incoming protocol and host name (for trusted callers). The
4777 host name and its colon can be omitted when only the protocol is to be set.
4778 Note the Exim already has two private options, -pd and -ps, that refer to
4779 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4780 "s", but I don't think that's a major issue.
4782 10. A number of refactoring changes to the code, none of which should affect
4785 (a) The number of logging options was getting close to filling up the
4786 32-bit word that was used as a bit map. I have split them into two classes:
4787 those that are passed in the argument to log_write(), and those that are
4788 only ever tested independently outside of that function. These are now in
4789 separate 32-bit words, so there is plenty of room for expansion again.
4790 There is no change in the user interface or the logging behaviour.
4792 (b) When building, for example, log lines, the code previously used a
4793 macro that called string_cat() twice, in order to add two strings. This is
4794 not really sufficiently general. Furthermore, there was one instance where
4795 it was actually wrong because one of the argument was used twice, and in
4796 one call a function was used. (As it happened, calling the function twice
4797 did not affect the overall behaviour.) The macro has been replaced by a
4798 function that can join an arbitrary number of extra strings onto a growing
4801 (c) The code for expansion conditions now uses a table and a binary chop
4802 instead of a serial search (which was left over from when there were very
4803 few conditions). Also, it now recognizes conditions like "pam" even when
4804 the relevant support is not compiled in: a suitably worded error message is
4805 given if an attempt is made to use such a condition.
4807 11. Added ${time_interval:xxxxx}.
4809 12. A bug was causing one of the ddress fields not to be passed back correctly
4810 from remote delivery subprocesses. The field in question was not being
4811 subsequently used, so this caused to problems in practice.
4813 13. Added new log selectors queue_time and deliver_time.
4815 14. Might have fixed a bug in maildirsizefile handling that threw up
4816 "unexpected character" debug warnings, and recalculated the data
4817 unnecessarily. In any case, I expanded the warning message to give more
4820 15. Added the message "Restricted characters in address" to the statements in
4821 the default ACL that block characters like @ and % in local parts.
4823 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4824 Three changes have been made:
4826 (a) There was a serious bug; a negative response to MAIL caused the whole
4827 recipient domain to be cached as invalid, thereby blocking all messages
4828 to all local parts at the same domain, from all senders. This bug has
4829 been fixed. The domain is no longer cached after a negative response to
4830 MAIL if the sender used is not empty.
4832 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4835 (c) A new callout option, "use_sender" has been added for people who want
4836 the modified behaviour.
4842 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4845 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4846 indeed breaks things for older releases.
4848 3. Added additional logging to the case where there is a problem reading data
4849 from a filter that is running in a subprocess using a pipe, in order to
4850 try to track down a specific problem.
4852 4. Testing facility fudge: when running in the test harness and attempting
4853 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4854 getting "No route to host". Convert this to a timeout.
4856 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4859 6. Some OS don't have socklen_t but use size_t instead. This affects the
4860 fifth argument of getsockopt() amongst other things. This is now
4861 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4862 can be set for individual OS. I have set it for SunOS5, OSF1, and
4863 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4864 some earlier ones do not.
4866 7. Change 4.30/15 was not doing the test caselessly.
4868 8. The standard form for an IPv6 address literal was being rejected by address
4869 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4870 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4871 this, as well as the form without the "IPv6" on the front (but only when
4872 address literals are enabled, of course).
4874 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4876 10. Exim crashed if a message with an empty sender address specified by -f
4877 encountered a router with an errors_to setting. This could be provoked only
4878 by a command such as
4882 where an empty string was supplied; "<>" did not hit this bug.
4884 11. Installed PCRE release 4.5.
4886 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4887 remained set. It is now erased.
4889 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4890 times from message ids (which are base 36 rather than the normal 62).
4892 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4893 were being counted as actual protocol errors, and logged if the log
4894 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4895 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4896 and DATA following a set of rejected RCPTs do not count as protocol errors.
4897 In other words, Exim assumes they were pipelined, though this may not
4898 actually be the case. Of course, in all cases the client gets an
4899 appropriate error code.
4901 15. If a lookup fails in an ACL condition, a message about the failure may
4902 be available; it is used if testing the ACL cannot continue, because most
4903 such messages specify what the cause of the deferral is. However, some
4904 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4905 that caused an old message to be retained and used if a later statement
4906 caused a defer, replacing the real cause of the deferral.
4908 16. If an IP address had so many PTR records that the DNS lookup buffer
4909 was not large enough to hold them, Exim could crash while trying to process
4910 the truncated data. It now detects and logs this case.
4912 17. Further to 4.21/58, another change has been made: if (and only if) the
4913 first line of a message (the first header line) ends with CRLF, a bare LF
4914 in a subsequent header line has a space inserted after it, so as not to
4915 terminate the header.
4917 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4918 unnecessarily, used atoi() instead of strtol(), and didn't check the
4919 termination when getting file sizes from file names by regex.
4921 19. Completely re-implemented the support for maildirsize files, in the light
4922 of a number of problems with the previous contributed implementation
4923 (4.30/29). In particular:
4925 . If the quota is zero, the maildirsize file is maintained, but no quota is
4928 . If the maildir directory does not exist, it is created before any attempt
4929 to write a maildirsize file.
4931 . The quota value in the file is just a cache; if the quota is changed in
4932 the transport, the new value overrides.
4934 . A regular expression is available for excluding directories from the
4937 20. The autoreply transport checks the characters in options that define the
4938 message's headers; it allows continued headers, but it was checking with
4939 isspace() after an embedded newline instead of explicitly looking for a
4942 21. If all the "regular" hosts to which an address was routed had passed their
4943 expiry times, and had not reached their retry times, the address was
4944 bounced, even if fallback hosts were defined. Now Exim should go on to try
4947 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4948 equivalent code in the SMTP transport. Some hosts send humungous responses
4949 to HELO/EHLO, more than 1024 it seems.
4951 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4952 gives compiler warnings in some environments. I've now done it "properly",
4955 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4956 (because of problems with the built-in one) was declared to return uschar *
4957 instead of char *, causing compiler failure.
4959 25. Fixed a file descriptor leak when processing alias/forward files.
4961 26. Fixed a minor format string issue in dbfn.c.
4963 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4965 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4966 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4969 29. When a sender address is verified, it is cached, to save repeating the test
4970 when there is more than one recipient in a message. However, when the
4971 verification involves a callout, it is possible for different callout
4972 options to be set for different recipients. It is too complicated to keep
4973 track of this in the cache, so now Exim always runs a verification when a
4974 callout is required, relying on the callout cache for the optimization.
4975 The overhead is duplication of the address routing, but this should not be
4978 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4979 to be verified with callout=postmaster, and the main callout worked but the
4980 postmaster check failed, the verification correctly failed. However, if a
4981 subsequent RCPT command asked for sender verification *without* the
4982 postmaster check, incorrect caching caused this verification also to fail,
4985 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4986 it was not caching the DNS options (qualify_single, search_parents) that
4987 were used when the lookup failed. A subsequent lookup with different
4988 options therefore always gave the same answer, though there were cases
4989 where it should not have. (Example: a "domains = !$mx_any" option on a
4990 dnslookup router: the "domains" option is always processed without any
4991 widening, but the router might have qualify_single set.) Now Exim uses the
4992 cached value only when the same options are set.
4994 32. Added John Jetmore's "exipick" utility to the distribution.
4996 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4997 than a timeout (e.g. a certificate is required, and is not provided), an
4998 Exim server now closes the connection immediately. Previously it waited for
4999 the client to close - but if the client is SSL, it seems that they each
5000 wait for each other, leading to a delay before one of them times out.
5002 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5003 maintained 0.8.x compatibility because I don't think many are using it, and
5004 it is clearly obsolete.
5006 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5009 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5010 client certificate was expired. A simple patch fixes this, though I don't
5011 understand the full logic of why the verify callback is called multiple
5014 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5015 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5016 which causes problems with some clients (such as the Certicom SSL Plus
5017 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5018 disables the coutermeasure allowing Eudora to connect."
5020 38. Exim was not checking that a write() to a log file succeeded. This could
5021 lead to Bad Things if a log got too big, in particular if it hit a file
5022 size limit. Exim now panics and dies if it cannot write to a log file, just
5023 as it does if it cannot open a log file.
5025 39. Modified OS/Makefile-Linux so that it now contains
5027 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5029 The two -D definitions ensure that Exim is compiled with large file
5030 support, which makes it possible to handle log files that are bigger than
5033 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5034 instance) a domain was checked against a named list that involved a lookup,
5035 causing $domain_data to be set, then another domain was checked against the
5036 same list, then the first domain was re-checked, the value of $domain_data
5037 after the final check could be wrong. In particular, if the second check
5038 failed, it could be set empty. This bug probably also applied to
5041 41. The strip_trailing_dot option was not being applied to the address given
5042 with the -f command-line option.
5044 42. The code for reading a message's header from the spool was incrementing
5045 $received_count, but never initializing it. This meant that the value was
5046 incorrect (doubled) while delivering a message in the same process in which
5047 it was received. In the most common configuration of Exim, this never
5048 happens - a fresh exec is done - but it can happen when
5049 deliver_drop_privilege is set.
5051 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5052 it now includes up to 150 characters of the unexpected data in the log
5055 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5056 and building data strings. The size of both of these buffers was 10 000
5057 bytes - far larger than anybody would *ever* want, thought I. Needless to
5058 say, somebody hit the limit. I have increased the maximum line length to
5059 20 000 and the maximum data length of concatenated lines to 100 000. I have
5060 also fixed two bugs, because there was no checking on these buffers. Tsk,
5061 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5062 buffer is too small.
5064 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5065 lsearch lookups. Now it does.
5067 46. When parsing a route_list item in a manualroute router, a fixed-length
5068 buffer was used for the list of hosts. I made this 1024 bytes long,
5069 thinking that nobody would ever have a list of hosts that long. Wrong.
5070 Somebody had a whole pile of complicated expansion conditions, and the
5071 string was silently truncated, leading to an expansion error. It turns out
5072 that it is easier to change to an unlimited length (owing to other changes
5073 that have happened since this code was originally written) than to build
5074 structure for giving a limitation error. The length of the item that
5075 expands into the list of hosts is now unlimited.
5077 47. The lsearch lookup could not handle data where the length of text line was
5078 more than 4095 characters. Such lines were truncated, leading to shortened
5079 data being returned. It should now handle lines of any length.
5081 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5082 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5085 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5086 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5087 no longer happens in comment lines. A list of replacements is now placed
5088 at the head of all of the source files, except those whose only change is
5089 to replace PERL_COMMAND in the very first #! line.
5091 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5092 messages on the queue, with a bottom-up merge sort, using code contributed
5093 by Michael Haardt. This should make operations like -bp somewhat faster on
5094 large queues. It won't affect queue runners, except when queue_run_in_order
5097 51. Installed eximstats 1.31 in the distribution.
5099 52. Added support for SRV lookups to the dnslookup router.
5101 53. If an ACL referred to $message_body or $message_body_end, the value was not
5102 reset for any messages that followed in the same SMTP session.
5104 54. The store-handling optimization for building very long strings was not
5105 differentiating between the different store pools. I don't think this
5106 actually made any difference in practice, but I've tidied it.
5108 55. While running the routers to verify a sender address, $sender_address
5109 was still set to the sender address. This is wrong, because when routing to
5110 send a bounce to the sender, it would be empty. Therefore, I have changed
5111 it so that, while verifying a sender address, $sender_address is set to <>.
5112 (There is no change to what happens when verifying a recipient address.)
5114 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5115 target A or AAAA records (if not already returned) without resetting the
5116 qualify_single or search_parents options of the DNS resolver. These are
5117 inappropriate in this case because the targets of MX and SRV records must
5118 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5119 target that, when qualified, matched something in the local domain. These
5120 two options are now turned off when doing these lookups.
5122 57. It seems that at least some releases of Reiserfs (which does not have the
5123 concept of a fixed number of inodes) returns zero and not -1 for the
5124 number of available inodes. This interacted badly with check_spool_inodes,
5125 which assumed that -1 was the "no such thing" setting. What I have done is
5126 to check that the total number of inodes is greater than zero before doing
5127 the test of how many are available.
5129 58. When a "warn" ACL statement has a log_message modifier, the message is
5130 remembered, and not repeated. This is to avoid a lot of repetition when a
5131 message has many recipients that cause the same warning to be written.
5132 Howewer, Exim was preserving the list of already written lines for an
5133 entire SMTP session, which doesn't seem right. The memory is now reset if a
5134 new message is started.
5136 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5137 debugging output unless log_rewrite was also set.
5139 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5140 of (int)(handle) when we know that handle contains (void *)(-1).
5142 61. The Exim daemon panic-logs an error return when it closes the incoming
5143 connection. However "connection reset by peer" seems to be common, and
5144 isn't really an error worthy of noting specially, so that particular error
5147 62. When Exim is trying to find all the local interfaces, it used to panic and
5148 die if the ioctl to get the interface flags failed. However, it seems that
5149 on at least one OS (Solaris 9) it is possible to have an interface that is
5150 included in the list of interfaces, but for which you get a failure error
5151 for this call. This happens when the interface is not "plumbed" into a
5152 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5153 failure of the "get flags" call assumes that the interface is down.
5155 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5156 makes life easier for people who are doing arithmetic on fields extracted
5157 from dates, where you often get leading zeros that should not be
5158 interpreted as octal.
5160 64. Added qualify_domain to the redirect router, to override the global
5163 65. If a pathologically long header line contained very many addresses (the
5164 report of this problem mentioned 10 000) and each of them was rewritten,
5165 Exim could use up a very large amount of memory. (It kept on making new
5166 copies of the header line as it rewrote, and never released the old ones.)
5167 At the expense of a bit more processing, the header rewriting function has
5168 been changed so that it no longer eats memory in this way.
5170 66. The generation of the Received: header has been moved from the time that a
5171 message starts to be received, to the time that it finishes. The timestamp
5172 in the Received: header should now be very close to that of the <= log
5173 line. There are two side-effects of this change:
5175 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5176 logged header lines no longer include the local Received: line, because
5177 it has not yet been created. The same applies to a copy of the message
5178 that is returned to a non-SMTP sender when a message is rejected.
5180 (b) When a filter file is tested using -bf, no additional Received: header
5181 is added to the test message. After some thought, I decided that this
5184 This change does not affect the value of $received_for. It is still set
5185 after address rewriting, but before local_scan() is called.
5187 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5189 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5190 gave an unhelpful panic error message, and a defer error. I have managed to
5191 change this behaviour so that it now rejects any supplied certificate,
5192 which seems right, as the list of acceptable certificates is empty.
5194 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5195 gave an unhelpful defer error. I have not managed to make this reject any
5196 supplied certificates, but the error message it gives is "no certificate
5197 supplied", which is not helpful.
5199 70. exigrep's output now also includes lines that are not associated with any
5200 message, but which match the given pattern. Implemented by a patch from
5201 Martin Sluka, which also tidied up the Perl a bit.
5203 71. Recipient callout verification, like sender verification, was using <> in
5204 the MAIL FROM command. This isn't really the right thing, since the actual
5205 sender may affect whether the remote host accepts the recipient or not. I
5206 have changed it to use the actual sender in the callout; this means that
5207 the cache record is now keyed on a recipient/sender pair, not just the
5208 recipient address. There doesn't seem to be a real danger of callout loops,
5209 since a callout by the remote host to check the sender would use <>.
5210 [SEE ABOVE: changed after hitting problems.]
5212 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5213 temporary errors. However, in the case of such a code being given after
5214 the end of a data transmission (i.e. after ".") Exim was failing to write
5215 a retry record for the message. (Yes, there was some broken host that was
5216 actually sending 8xx at this point.)
5218 73. An unknown lookup type in a host list could cause Exim to panic-die when
5219 the list was checked. (An example that provoked this was putting <; in the
5220 middle of a list instead of at the start.) If this happened during a DATA
5221 ACL check, a -D file could be left lying around. This kind of configuration
5222 error no longer causes Exim to die; instead it causes a defer errror. The
5223 incident is still logged to the main and panic logs.
5225 74. Buglet left over from Exim 3 conversion. The message "too many messages
5226 in one connection" was written to the rejectlog but not the mainlog, except
5227 when address rewriting (yes!) was being logged.
5229 75. Added write_rejectlog option.
5231 76. When a system filter was run not as root (that is, when system_filter_user
5232 was set), the values of the $n variables were not being returned to the
5233 main process; thus, they were not subsequently available in the $sn
5236 77. Added +return_path_on_delivery log selector.
5238 78. A connection timeout was being treated differently from recipients deferred
5239 when testing hosts_max_try with a message that was older than the host's
5240 retry timeout. (The host should not be counted, thus allowing all hosts to
5241 be tried at least once before bouncing.) This may have been the cause of an
5242 occasionally reported bug whereby a message would remain on the queue
5243 longer than the retry timeout, but would be bounced if a delivery was
5244 forced. I say "may" because I never totally pinned down the problem;
5245 setting up timeout/retry tests is difficult. See also the next item.
5247 79. The ultimate address timeout was not being applied to errors that involved
5248 a combination of host plus message (for example, a timeout on a MAIL
5249 command). When an address resolved to a number of possible hosts, and they
5250 were not all tried for each delivery (e.g. because of hosts_max_try), a
5251 message could remain on the queue longer than the retry timeout.
5253 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5256 81. Fixed an obscure SMTP outgoing bug which required at least the following
5257 conditions: (a) there was another message waiting for the same server;
5258 (b) the server returned 5xx to all RCPT commands in the first message so
5259 that the message was not completed; (c) the server dropped the connection
5260 or gave a negative response to the RSET that Exim sends to abort the
5261 transaction. The observed case was a dropped connection after DATA that had
5262 been sent in pipelining mode. That is, the server had advertised PIPELINING
5263 but was not implementing it correctly. The effect of the bug was incorrect
5264 behaviour, such as trying another host, and this could lead to a crash.
5270 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5271 and daemon.c were passed as pointers to ints; they should have been
5272 pointers to socklen_t variables (which are typically unsigned ints).
5274 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5277 3. Fixed a really odd bug that affected only the testing scheme; patching a
5278 certain fixed string in the binary changed the value of another string that
5279 happened to be identical to the end of the original first string.
5281 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5282 name", it returns that address as the IP address. On some operating
5283 systems (e.g. Solaris), it also passes back the IP address string as the
5284 "host name". However, on others (e.g. Linux), it passes back an empty
5285 string. Exim wasn't checking for this, and was changing the host name to an
5286 empty string, assuming it had been canonicized.
5288 5. Although rare, it is permitted to have more than one PTR record for a given
5289 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5290 all the names associated with an address, because they do in Solaris.
5291 However, it seems that they do not in Linux for data that comes from the
5292 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5293 I found this out when I moved to a new Linux workstation and tried to run
5294 the Exim test suite.
5296 To get round this problem I have changed the code so that it now does its
5297 own call to the DNS to look up PTR records when searching for a host name.
5298 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5299 addresses that are only in /etc/hosts are still found.
5301 This behaviour is, however, controlled by an option called host_lookup_
5302 order, which defaults to "bydns:byaddr". If people want to use the other
5303 order, or indeed, just use one or the other means of lookup, they can
5304 specify it in this variable.
5306 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5307 some operating systems, this comes back from gethostbyaddr() as an empty
5308 string, and this is what Exim used to test for. However, it seems that in
5309 other systems, "." is yielded. Exim now tests for this case too.
5311 7. The values of check_spool_space and check_log_space are now held internally
5312 as a number of kilobytes instead of an absolute number of bytes. If a
5313 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5314 kilobyte. This means that much larger values can be stored.
5316 8. Exim monitor: an attempt to get the action menu when not actually pointing
5317 at a message produces an empty menu entitled "No message selected". This
5318 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5319 no entries in it ("Shell widget menu has zero width and/or height"). So I
5320 have added a single, blank menu entry in this case.
5322 9. Added ${quote_local_part.
5324 10. MIME decoding is now applied to the contents of Subject: header lines when
5327 11. Now that a reference to $sender_host_address automatically causes a reverse
5328 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5329 host lookup before query-style lookups in lists that might use this
5330 variable. This has therefore been abolished, and the "net-" prefix is no
5331 longer necessary for query-style lookups.
5333 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5334 have been a typo for LFLAGS, so it has been changed.
5336 13. The install script calls Exim with "-C /dev/null" in order to find the
5337 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5338 to be output. Howeve, since Exim outputs its version number before the
5339 error, it didn't break the script. It just looked ugly. I fixed this by
5340 always allowing "-C /dev/null" if the caller is root.
5342 14. Ignore overlarge ACL variable number when reading spool file - insurance
5343 against a later release with more variables having written the file.
5345 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5346 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5347 this, as well as the form without the "IPv6" on the front.
5349 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5350 OS/Makefile-Darwin file.
5352 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5353 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5355 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5356 variable. However, some OS use ints for inodes. I've added cast to long int
5357 to get rid of the compiler warning.
5359 19. I had forgotten to lock out "/../" in configuration file names when
5360 ALT_CONFIG_PREFIX was set.
5362 20. Routers used for verification do not need to specify transports. However,
5363 if such a router generated a host list, and callout was configured, Exim
5364 crashed, because it could not find a port number from the (non-existent)
5365 transport. It now assumes port 25 in this circumstance.
5367 21. Added the -t option to exigrep.
5369 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5370 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5371 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5372 them is set, LOOKUP_LSEARCH is forced.
5374 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5376 24. Added sender and host information to the "rejected by local_scan()" log
5377 line; previously there was no indication of these.
5379 25. Added .include_if_exists.
5381 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5382 Linux. It turns out that not all file systems support this. Apparently some
5383 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5384 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5385 not supported on the file descriptor, is now ignored when Exim is trying to
5386 sync a directory. This applies only to Linux.
5388 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5390 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5391 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5394 29. Added support for maildirsize files from supplied patch (modified a bit).
5396 30. The use of :fail: followed by an empty string could lead Exim to respond to
5397 sender verification failures with (e.g.):
5399 550 Verification failed for <xxx>
5400 550 Sender verify failed
5402 where the first response line was missing the '-' that indicates it is not
5403 the final line of the response.
5405 31. The loop for finding the name of the user that called Exim had a hardwired
5406 limit of 10; it now uses the value of finduser_retries, which is used for
5407 all other user lookups.
5409 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5412 33. Exim was neglecting to zero errno before one call of strtol() when
5413 expanding a string and expecting an integer value. On some systems this
5414 resulted in spurious "integer overflow" errors. Also, it was casting the
5415 result into an int without checking.
5417 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5418 did not work. The code looks as if it has *never* worked, though it appears
5419 to have been documented since at least releast 1.62. I have made it work.
5421 35. The "timeout_DNS" error in retry rules, also documented since at least
5422 1.62, also never worked. As it isn't clear exactly what this means, and
5423 clearly it isn't a major issue, I have abolished the feature by treating it
5424 as "timeout", and writing a warning to the main and panic logs.
5426 36. The display of retry rules for -brt wasn't always showing the error code
5429 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5430 timeout_connect_A, timeout_connect_MX.
5432 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5433 to the empty sender.
5435 39. The daemon was not analysing the content of -oX till after it had closed
5436 stderr and disconnected from the controlling terminal. This meant that any
5437 syntax errors were only noted on the panic log, and the return code from
5438 the command was 0. By re-arranging the code a little, I've made the
5439 decoding happen first, so such errors now appear on stderr, and the return
5440 code is 1. However, the actual setting up of the sockets still happens in
5441 the disconnected process, so errors there are still only recorded on the
5444 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5445 connections (as happens on some IP stacks) was logged at start up time as
5446 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5447 it from "IPv6 and IPv4", which means that two separate sockets are being
5450 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5451 says whether AF_INET or AF_INET6 was passed as an argument.
5453 42. Exiwhat output was messed up when time zones were included in log
5456 43. Exiwhat now gives more information about the daemon's listening ports,
5457 and whether -tls-on-connect was used.
5459 44. The "port" option of the smtp transport is now expanded.
5461 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5462 silently ignored. Now an error message is written to the main and panic
5465 46. There's a new ACL modifier called "logwrite" which writes to a log file
5466 as soon as it is encountered.
5468 47. Added $local_user_uid and $local_user_gid at routing time.
5470 48. Exim crashed when trying to verify a sender address that was being
5473 49. Exim was recognizing only a space character after ".include". It now also
5474 recognizes a tab character.
5476 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5477 extracting the relevant information from the specification. The man page no
5478 longer contains scrambled data for the -d option, and I've added a section
5479 at the front about calling Exim under different names.
5481 51. Added "extra_headers" argument to the "mail" command in filter files.
5483 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5486 53. Installed eximstats 1.29.
5488 54. Added transport_filter_timeout as a generic transport option.
5490 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5491 Cc: header lines. This was required by RFC 822, but it not required by RFC
5494 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5495 incoming messages that did not have them. Now it does so only if the
5496 message originates locally, that is, if there is no associated remote host
5497 address. When Resent- header lines are present, this applies to the Resent-
5498 lines rather than the non-Resent- lines.
5500 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5501 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5503 58. Messages for configuration errors now include the name of the main
5504 configuration file - useful now that there may be more than one file in a
5505 list (.included file names were always shown).
5507 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5508 for those rare installations that do not start the daemon as root or run it
5509 setuid root. I've cut out the call to initgroups() if the daemon is not
5512 60. The Exim user and group can now be bound into the binary as text strings
5513 that are looked up at the start of Exim's processing.
5515 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5517 62. Added $mailstore_basename variable.
5519 63. Installed patch to sieve.c from Michael Haardt.
5521 64. When Exim failed to open the panic log after failing to open the main log,
5522 the original message it was trying to log was written to stderr and debug
5523 output, but if they were not available (the usual case in production), it
5524 was lost. Now it is written to syslog before the two lines that record the
5525 failures to open the logs.
5527 65. Users' Exim filters run in subprocesses under the user's uid. It is
5528 possible for a "deliver" command or an alias in a "personal" command to
5529 provoke an address rewrite. If logging of address rewriting is configured,
5530 this fails because the process is not running as root or exim. There may be
5531 a better way of dealing with this, but for the moment (because 4.30 needs
5532 to be released), I have disabled address rewrite logging when running a
5533 filter in a non-root, non-exim process.
5539 1. The buildconfig auxiliary program wasn't quoting the value set for
5540 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5541 not defined. This bug was masked in 4.22 by the effect that was fixed in
5544 2. Some messages that were rejected after a message id was allocated were
5545 shown as "incomplete" by exigrep. It no longer does this for messages that
5546 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5548 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5549 have allow_domain_literals set, the ID did not get logged in the <= line.
5550 Domain literals are now always recognized in Message-ID: header lines.
5552 4. The first argument for a ${extract expansion item is the key name or field
5553 number. Leading and trailing spaces in this item were not being ignored,
5554 causing some misleading effects.
5556 5. When deliver_drop_privilege was set, single queue runner processes started
5557 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5558 same command in the process it spins off) were not dropping privilege.
5560 6. When the daemon running as "exim" started a queue runner, it always
5561 re-executed Exim in the spun-off process. This is a waste of effort when
5562 deliver_drop_privilege is set. The new process now just calls the
5563 queue-runner function directly.
5569 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5572 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5573 ignored. Though the use of -oP was forcing the writing of a pid file, it
5574 was always written to the default place.
5576 3. If the message "no IP address found for host xxxx" is generated during
5577 incoming verification, it is now followed by identification of the incoming
5578 connection (so you can more easily find what provoked it).
5580 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5582 5. Added some features to "harden" Exim a bit more against certain attacks:
5584 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5585 be put in Local/Makefile. This is like the never_users runtime option,
5586 but it cannot be overridden. The default setting is "root".
5588 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5589 prefix string with which any file named in a -C command line option
5592 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5593 is retained for -C and -D only if the caller of Exim is root. Without
5594 it, the exim user may also use -C and -D and retain privilege.
5596 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5597 command line option is disabled.
5599 6. Macro names set by the -D option must start with an upper case letter, just
5600 like macro names defined in the configuration file.
5602 7. Added "dereference=" facility to LDAP.
5604 8. Two instances of the typo "uknown" in the source files are fixed.
5606 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5607 the Configure-Makefile script screwed up while processing it.
5609 10. Incorporated PCRE 4.4.
5611 11. The SMTP synchronization check was not operating right at the start of an
5612 SMTP session. For example, it could not catch a HELO sent before the client
5613 waited for the greeting. There is now a check for outstanding input at the
5614 point when the greeting is written. Because of the duplex, asynchronous
5615 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5616 way, but not yet received, when the check is performed.
5618 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5619 on TCP/IP sockets, because this apparently causes some broken clients to
5622 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5623 unchanged) from the Cygwin maintainer.
5625 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5626 was supported instead of testing for mbx. Effectively a typo.
5628 15. The spa authenticator server code was not checking that the input it
5629 received was valid base64.
5631 16. The debug output line for the "set" modifier in ACLs was not showing the
5632 name of the variable that was being set.
5634 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5636 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5637 lookup on its own. Something else was needed to trigger the lookup. For
5638 example, a match in host_lookup or the need for a host name in a host list.
5639 Now, if $sender_host_name is referenced and the host name has not yet been
5640 looked up, a lookup is performed. If the lookup fails, the variable remains
5641 empty, and $host_lookup_failed is set to "1".
5643 19. Added "eqi" as a case-independent comparison operator.
5645 20. The saslauthd authentication condition could segfault if neither service
5646 nor realm was specified.
5648 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5649 error message that was logged was misleading, and incoming SMTP
5650 connections were dropped. The message is now more accurate, and temporary
5651 errors are given to SMTP connections.
5653 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5654 (except RSET) with a 421 error, until QUIT is received. However, it was
5655 failing to send a response to QUIT.
5657 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5658 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5659 ACL is now run after the helo_try_verify_hosts code.
5661 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5662 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5663 case-independent, so other case variants are also recognized). Apparently
5664 some systems use these upper case variants.
5666 25. If more than two messages were waiting for the same host, and a transport
5667 filter was specified for the transport, Exim sent two messages over the
5668 same TCP/IP connection, and then failed with "socket operation on non-
5669 socket" when it tried to send the third.
5671 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5673 27. The extern definition of crypt16() in expand.c was not being excluded when
5674 the OS had its own crypt16() function.
5676 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5677 as a preferred synonym for return_size_limit, both as an option and as an
5680 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5682 30. Changed the default configuration ACL to relax the local part checking rule
5683 for addresses that are not in any local domains. For these addresses,
5684 slashes and pipe symbols are allowed within local parts, but the sequence
5685 /../ is explicitly forbidden.
5687 31. SPA server authentication was not clearing the challenge buffer before
5690 32. log_message in a "warn" ACL statement was writing to the reject log as
5691 well as to the main log, which contradicts the documentation and doesn't
5692 seem right (because no rejection is happening). So I have stopped it.
5694 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5695 However, I am unable to do any testing of this.
5697 34. Fixed an infelicity in the appendfile transport. When checking directories
5698 for a mailbox, to see if any needed to be created, it was accidentally
5699 using path names with one or more superfluous leading slashes; tracing
5700 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5702 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5703 contents are added to the log line that is written for every discarded
5704 recipient. (Previously a log_message setting was ignored.)
5706 36. The ${quote: operator now quotes the string if it is empty.
5708 37. The install script runs exim in order to find its version number. If for
5709 some reason other than non-existence or emptiness, which it checks, it
5710 could not run './exim', it was installing it with an empty version number,
5711 i.e. as "exim-". This error state is now caught, and the installation is
5714 38. An argument was missing from the function that creates an error message
5715 when Exim fails to connect to the socket for saslauthd authentication.
5716 This could cause Exim to crash, or give a corrupted message.
5718 39. Added isip, isip4, and isip6 to ${if conditions.
5720 40. The ACL variables $acl_xx are now saved with the message, and can be
5721 accessed later in routers, transports, and filters.
5723 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5724 strings in the file are not string-expanded.
5726 42. If a MAIL command specified a SIZE value that was too large to fit into an
5727 int variable, the check against message_size_limit failed. Such values are
5728 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5729 day this will have to be increased, but I don't think I want to be around
5730 when emails are that large.
5737 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5738 iconv() is not standard in FreeBSD.
5740 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5741 IPv6 enabled. The observed symptom was a segmentation fault on return from
5742 the function os_common_find_running_interfaces() in src/os.c.
5744 3. In the check_special_case() function in daemon.c I had used "errno" as an
5745 argument name, which causes warnings on some systems. This was basically a
5746 typo, since it was named "eno" in the comments!
5748 4. The code that waits for the clock to tick (at a resolution of some fraction
5749 of a second) so as to ensure message-id uniqueness was always waiting for
5750 at least one whole tick, when it could have waited for less. [This is
5751 almost certainly not relevant at current processor speeds, where it is
5752 unlikely to ever wait at all. But we try to future-proof.]
5754 5. The function that sleeps for a time interval that includes fractions of a
5755 second contained a race. It did not block SIGALRM between setting the
5756 timer, and suspending (a couple of lines later). If the interval was short
5757 and the sigsuspend() was delayed until after it had expired, the suspension
5758 never ended. On busy systems this could lead to processes getting stuck for
5761 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5762 process, before it forks any delivery processes. The open lookup caching
5763 mechanism meant that the open file or database connection was passed into
5764 the delivery process. The problem was that delivery processes always tidy
5765 up cached lookup data. This could cause a problem for the next delivery
5766 process started by the queue runner, because the external queue runner
5767 process does not know about the closure. So the next delivery process
5768 still has data in the lookup cache. In the case of a file lookup, there was
5769 no problem because closing a file descriptor in a subprocess doesn't affect
5770 the parent. However, if the lookup was caching a connection to a database,
5771 the connection was closed, and the second delivery process was likely to
5772 see errors such as "PGSQL: query failed: server closed the connection
5773 unexpectedly". The problem has been fixed by closing all cached lookups
5774 in a queue runner before running a delivery process.
5776 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5777 seem to have the "const" qualifier which it has on other OS. I've
5780 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5781 *of the same type* (client or server) with the same public name that an
5782 error should be diagnosed.
5784 9. When Exim looked up a host name for an IP address, but failed to find the
5785 original IP address when looking up the host name (a safety check), it
5786 output the message "<ip address> does not match any IP for NULL", which was
5787 confusing, to say the least. The bug was that the host name should have
5788 appeared instead of "NULL".
5790 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5791 user that is built into the binary, and the -C or -D options is used, root
5792 privilege is dropped before the configuration file is read. In addition,
5793 logging is switched to stderr instead of the normal log files. If the
5794 configuration then re-defines the Exim user, the unprivileged environment
5795 is probably not what is expected, so Exim logs a panic warning message (but
5798 However, if deliver_drop_privilege is set, the unprivileged state may well
5799 be exactly what is intended, so the warning has been cut out in that case,
5800 and Exim is allowed to try to write to its normal log files.
5806 1. smtp_return_error_details was not giving details for temporary sender
5807 or receiver verification errors.
5809 2. Diagnose a configuration error if two authenticators have the same public
5812 3. Exim used not to create the message log file for a message until the first
5813 delivery attempt. This could be confusing when incoming messages were held
5814 for policy or load reasons. The message log file is now created at the time
5815 the message is received, and an initial "Received" line is written to it.
5817 4. The automatically generated man page for command line options had a minor
5818 bug that caused no ill effects; however, a more serious problem was that
5819 the procedure for building the man page automatically didn't always
5820 operate. Consequently, release 4.20 contains an out-of-date version. This
5821 shouldn't happen again.
5823 5. When building Exim with embedded Perl support, the script that builds the
5824 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5825 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5827 6. The freeze_tell option was not being used for messages that were frozen on
5828 arrival, either by an ACL or by local_scan().
5830 7. Added the smtp_incomplete_transaction log selector.
5832 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5833 was accepting AUTH without a new EHLO.
5835 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5836 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5839 10. Logging of TCP/IP connections (when configured) now happens in the main
5840 daemon process instead of the child process, so that the TCP/IP connection
5841 count is more accurate (but it can never be perfect).
5843 11. The use of "drop" in a nested ACL was not being handled correctly in the
5844 outer ACL. Now, if condition failure induced by the nested "drop" causes
5845 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5846 or "require"), the connection is dropped.
5848 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5849 that yield "discard" can now be used with an "accept" or a "discard" verb,
5850 but an error is generated for any others (because I can't see a useful way
5851 to define what should happen).
5853 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5854 are now processed in the same way as lines in the Exim configuration file.
5855 In particular, continuation lines are supported.
5857 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5859 15. Added -ti meaning -t -i.
5861 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5862 domains, and warn by logging if others are found.
5864 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5865 returned from GIFCONF when Exim is trying to find the list of interfaces on
5866 a host. The code in os.c has been modified to copy each ifreq to an aligned
5867 structure in all cases.
5869 Also, in some cases, the returned ifreq's were being copied to a 'struct
5870 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5871 means the last couple of bytes of an IPv6 address could be chopped if the
5872 ifreq contained only a normal sockaddr (14 bytes storage).
5874 18. Named domain lists were not supported in the hosts_treat_as_local option.
5875 An entry such as +xxxx was not recognized, and was treated as a literal
5878 19. Ensure that header lines added by a DATA ACL are included in the reject log
5879 if the ACL subsequently rejects the message.
5881 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5882 MD5 (which is deprecated).
5884 21. When testing a filter file using -bf, Exim was writing a message when it
5885 took the sender from a "From " line in the message, but it was not doing so
5886 when it took $return_path from a Return-Path: header line. It now does.
5888 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5889 with a valid header line field name (a series of printing characters
5890 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5892 23. Changed "disc" in the source to "disk" to conform to the documentation and
5893 the book and for uniformity.
5895 24. Ignore Sendmail's -Ooption=value command line item.
5897 25. When execve() failed while trying to run a command in a pipe transport,
5898 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5899 could be confused with a return value of 69 from the command itself. This
5900 has been changed to 127, the value the shell returns if it is asked to run
5901 a non-existent command. The wording for the related log line suggests a
5902 non-existent command as the problem.
5904 26. If received_header_text expands to an empty string, do not add a Received:
5905 header line to the message. (Well, it adds a token one on the spool, but
5906 marks it "old" so that it doesn't get used or transmitted.)
5908 27. Installed eximstats 1.28 (addition of -nt option).
5910 28. There was no check for failure on the call to getsockname() in the daemon
5911 code. This can fail if there is a shortage of resources on the system, with
5912 ENOMEM, for example. A temporary error is now given on failure.
5914 29. Contrary to the C standard, it seems that in some environments, the
5915 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5916 program. Exim now does this explicitly; it affects the formatting of
5917 timestamps using strftime().
5919 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5920 complaints. I've now initialized all the variables, to avoid this.
5922 32. Header lines added by a system filter were not being "seen" during
5923 transport-time rewrites.
5925 33. The info_callback() function passed to OpenSSL is set up with type void
5926 (*)(SSL *, int, int), as described somewhere. However, when calling the
5927 function (actually a macro) that sets it up, the type void(*)() is
5928 expected. I've put in a cast to prevent warnings from picky compilers.
5930 34. If a DNS black list lookup found a CNAME record, but there were no A
5931 records associated with the domain it pointed at, Exim crashed.
5933 35. If a DNS black list lookup returned more than one A record, Exim ignored
5934 all but the first. It now scans all returned addresses if a particular IP
5935 value is being sought. In this situation, the contents of the
5936 $dnslist_value variable are a list of all the addresses, separated by a
5939 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5940 to accept a host name and all its aliases if the forward lookup for any of
5941 them yielded the IP address of the incoming connection. Now it accepts only
5942 those names whose forward lookup yields the correct IP address. Any other
5943 names are discarded. This closes a loophole whereby a rogue DNS
5944 administrator could create reverse DNS records to break through a
5945 wildcarded host restriction in an ACL.
5947 37. If a user filter or a system filter that ran in a subprocess used any of
5948 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5949 the wrong values were passed to the pipe command ($thisaddress had the
5950 value of $0, $0 had the value of $1, etc). This bug was introduced by
5951 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5953 38. Improved the line breaking for long SMTP error messages from ACLs.
5954 Previously, if there was no break point between 40 and 75 characters, Exim
5955 left the rest of the message alone. Two changes have been made: (a) I've
5956 reduced the minimum length to 35 characters; (b) if it can't find a break
5957 point between 35 and 75 characters, it looks ahead and uses the first one
5958 that it finds. This may give the occasional overlong line, but at least the
5959 remaining text gets split now.
5961 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5962 file descriptors might be low, and that setting 1000 would always raise it.
5963 It turns out that in some environments, the limit is already over 1000 and
5964 that lowering it causes trouble. So now Exim takes care not to decrease it.
5966 40. When delivering a message, the value of $return_path is set to $sender_
5967 address at the start of routing (routers may change the value). By an
5968 oversight, this default was not being set up when an address was tested by
5969 -bt or -bv, which affected the outcome if any router or filter referred to
5972 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5973 log only when "message" or "log_message" are set. However, if one of the
5974 conditions was an address verification, or a call to a nested ACL, the
5975 messages generated by the underlying test were being passed through. This
5976 no longer happens. The underlying message is available in $acl_verify_
5977 message for both "message" and "log_message" expansions, so it can be
5978 passed through if needed.
5980 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5981 new expansion $bh_ to give the encoded byte string without charset
5982 translation. Translation happens only if iconv() is available; HAVE_ICONV
5983 indicates this at build time. HEADERS_CHARSET gives the charset to
5984 translate to; headers_charset can change it in the configuration, and
5985 "headers charset" can change it in an individual filter file.
5987 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5988 that creates RFC 2047 encoded "words" labels them as that charset instead
5989 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5990 expansion operator; (ii) when Exim creates a From: line for a local
5991 message; (iii) when a header line is rewritten to include a "phrase" part.
5993 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5994 buggy, causing it to skip the first lines of messages whose message ID
5995 ended in 'D'. This would not have bitten before Exim release 4.14, because
5996 message IDs were unlikely to end in 'D' before then. The effect was to have
5997 incorrect size information for certain domains.
5999 45. #include "config.h" was missing at the start of the crypt16.c module. This
6000 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6003 46. If there was a timeout during a "random" callout check, Exim treated it as
6004 a failure of the random address, and carried on sending RSET and the real
6005 address. If the delay was just some slowness somewhere, the response to the
6006 original RCPT would be taken as a response to RSET and so on, causing
6007 mayhem of various kinds.
6009 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6010 when I implemented it. It didn't allow for the fact that some option values
6011 may legitimatetly be negative (e.g. size_addition), and it didn't even do
6012 the right test for positive values.
6014 48. Domain names in DNS records are case-independent. Exim always looks them up
6015 in lower case. Some resolvers return domain names in exactly the case they
6016 appear in the zone file, that is, they may contain uppercase letters. Not
6017 all resolvers do this - some return always lower case. Exim was treating a
6018 change of case by a resolver as a change of domain, similar to a widening
6019 of a domain abbreviation. This triggered its re-routing code and so it was
6020 trying to route what was effectively the same domain again. This normally
6021 caused routing to fail (because the router wouldn't handle the domain
6022 twice). Now Exim checks for this case specially, and just changes the
6023 casing of the domain that it ultimately uses when it transmits the message
6026 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6029 50. If a filter generated a file delivery with a non-absolute name (possible if
6030 no home directory exists for the router), the forbid_file option was not
6033 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6034 the existing equality matching.
6036 52. Exim was using ints instead of ino_t variables in some places where it was
6037 dealing with inode numbers.
6039 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6040 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6041 called TMPDIR, and if it finds it is different, it changes its value.
6043 54. The smtp_printf() function is now made available to local_scan() so
6044 additional output lines can be written before returning. There is also an
6045 smtp_fflush() function to enable the detection of a dropped connection.
6046 The variables smtp_input and smtp_batched_input are exported to
6049 55. Changed the default runtime configuration: the message "Unknown user"
6050 has been removed from the ACL, and instead placed on the localuser router,
6051 using the cannot_route_message feature. This means that any verification
6052 failures that generate their own messages won't get overridden. Similarly,
6053 the "Unrouteable address" message that was in the ACL for unverifiable
6054 relay addresses has also been removed.
6056 56. Added hosts_avoid_esmtp to the smtp transport.
6058 57. The exicyclog script was not checking for the esoteric option
6059 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6060 will work only if exicyclog is run under the appropriate euid.
6062 58. Following a discussion on the list, the rules by which Exim recognises line
6063 endings on incoming messages have been changed. The -dropcr and drop_cr
6064 options are now no-ops, retained only for backwards compatibility. The
6065 following line terminators are recognized: LF CRLF CR. However, special
6066 processing applies to CR:
6068 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6069 nor a local message in the state where . is a terminator.
6071 (ii) If a bare CR is encountered in a header line, an extra space is added
6072 after the line terminator so as not to end the header. The reasoning
6073 behind this is that bare CRs in header lines are most likely either
6074 to be mistakes, or people trying to play silly games.
6076 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6077 was being incorrectly given as 18 bytes larger than it should have been.
6078 This is a VOB (very old bug).
6080 60. This may never have affected anything current, but just in case it has:
6081 When the local host is found other than at the start of a list of hosts,
6082 the local host, those with the same MX, and any that follow, are discarded.
6083 When the list in question was part of a longer list of hosts, the following
6084 hosts (not currently being processed) were also being discarded. This no
6085 longer happens. I'm not sure if this situation could ever has previously
6088 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6091 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6092 header. This is something that is recommended in a new Internet Draft, and
6093 is something that is documented as being done by Sendmail. There are two
6094 possible values. For messages generated by the autoreply transport, Exim
6097 Auto-Submitted: auto-replied
6099 whereas for all other generated messages (e.g. bounces) it adds
6101 Auto-Submitted: auto-generated
6103 63. The "personal" condition in filters now includes a test for the
6104 Auto-Submitted: header. If it contains the string "auto-" the message it
6105 not considered personal.
6107 64. Added rcpt_include_affixes as a generic transport option.
6109 65. Added queue_only_override (default true).
6111 66. Added the syslog_duplication option.
6113 67. If what should have been the first header line of a message consisted of
6114 a space followed by a colon, Exim was mis-interpreting it as a header line.
6115 It isn't of course - it is syntactically invalid and should therefore be
6116 treated as the start of the message body. The misbehaviour could have
6117 caused a number of strange effects, including loss of data in subsequent
6118 header lines, and spool format errors.
6120 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6121 client host had authenticated. This control can now be exercised by an ACL
6122 for more flexibility.
6124 69. By default, callouts do not happen when testing with -bh. There is now a
6125 variant, -bhc, which does actually run the callout code, including
6126 consulting and updating the callout cache.
6128 70. Added support for saslauthd authentication, courtesy of Alexander
6131 71. If statvfs() failed on the spool or log directories while checking their
6132 size for availability, Exim confusingly gave the error "space shortage".
6133 Furthermore, in debugging mode it crashed with a floating point exception.
6134 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6135 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6136 serious problem, Exim now writes to the main and panic logs when this
6137 happens, with details of the failure. It then refuses to accept the
6138 incoming message, giving the message "spool directory problem" or "log
6139 directory problem" with a 421 code for SMTP messages.
6141 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6142 0, 1, and 2 exist, because some OS complain for execs without them (see
6143 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6144 descriptors. However, the code omitted to check that the open succeeded,
6145 causing mysterious errors if for some reason the permissions on /dev/null
6146 got screwed. Now Exim writes a message to the main and panic logs, and
6147 bombs out if it can't open /dev/null.
6149 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6150 interact so that it is all more flexible. It is supposed to remain
6151 backwards compatible. Also added extra_local_interfaces.
6153 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6154 to bomb out with an assertion failure - to the client this appears as a
6155 connection drop. This problem occurs in the part of the code that was taken
6156 from the Samba project. Fortunately, the assertion is in a very simple
6157 function, so I have fixed this by reproducing the function inline in the
6158 one place where it is called, and arranging for authentication to fail
6159 instead of killing the process with assert().
6161 75. The SPA client code was not working when the server requested OEM rather
6162 than Unicode encoding.
6164 76. Added code to make require_files with a specific uid setting more usable in
6165 the case where statting the file as root fails - usually a non-root-mounted
6166 NFS file system. When this happens and the failure is EACCES, Exim now
6167 forks a subprocess and does the per-uid checking as the relevant uid.
6169 77. Added process_log_path.
6171 78. If log_file_path was not explicitly set, a setting of check_log_space or
6172 check_log_inodes was ignored.
6174 79. If a space check for the spool or log partitions fails, the incident is now
6175 logged. Of course, in the latter case the data may get lost...
6177 80. Added the %p formatting code to string_format() so that it can be used to
6178 print addresses in debug_print(). Adjusted all the address printing in the
6179 debugging in store.c to use %p rather than %d.
6181 81. There was a concern that a line of code in smtp_in.c could overflow a
6182 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6183 initially expressed, the concern was not well-founded, because trailing
6184 spaces are removed early. However, if the trailing spaces were followed by
6185 a NULL, they did not get removed, so the overflow was possible. Two fixes
6188 (a) I re-wrote the offending code in a cleaner fashion.
6189 (b) If an incoming SMTP command contains a NULL character, it is rejected
6192 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6193 runs initgroups(), so that if the Exim user is in any additional groups,
6194 they will be used during message reception.
6200 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob