1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
8 and 3.4.4 - once the server is enabled to respond to an OCSP request
9 it does even when not requested, resulting in a stapling non-aware
10 client dropping the TLS connection.
15 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
18 JH/02 The smtp transport option "multi_domain" is now expanded.
20 JH/03 The smtp transport now requests PRDR by default, if the server offers
23 JH/04 Certificate name checking on server certificates, when exim is a client,
24 is now done by default. The transport option tls_verify_cert_hostnames
25 can be used to disable this per-host. The build option
26 EXPERIMENTAL_CERTNAMES is withdrawn.
28 JH/05 The value of the tls_verify_certificates smtp transport and main options
29 default to the word "system" to access the system default CA bundle.
30 For GnuTLS, only version 3.0.20 or later.
32 JH/06 Verification of the server certificate for a TLS connection is now tried
33 (but not required) by default. The verification status is now logged by
34 default, for both outbound TLS and client-certificate supplying inbound
37 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
40 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
41 Status Notification (bounce) messages are now MIME format per RFC 3464.
42 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
43 under the control of the dsn_advertise_hosts option, and routers may
44 have a dsn_lasthop option.
46 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
47 default, modifiable by a malware= option. The list separator for
48 the options can now be changed in the usual way. Bug 68.
50 JH/10 The smtp_receive_timeout main option is now expanded before use.
52 JH/11 The incoming_interface log option now also enables logging of the
53 local interface on delivery outgoing connections.
55 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
56 if the interface and destination host and port all match.
58 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
61 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
62 Patch from Andrew Lewis.
64 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
65 now supports optional time-restrictions, weighting, and priority
66 modifiers per server. Patch originally by <rommer@active.by>.
68 JH/16 The spamd_address main option now supports a mixed list of local
69 and remote servers. Remote servers can be IPv6 addresses, and
72 JH/17 Bug 68: The spamd_address main option now supports an optional
73 timeout value per server.
75 JH/18 Bug 1581: Router and transport options headers_add/remove can
76 now have the list separator specified.
78 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
81 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
84 JH/21 Support for the A6 type of dns record is withdrawn.
86 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
87 rather than the verbs used.
89 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
90 from 255 to 1024 chars.
92 JH/24 Verification callouts now attempt to use TLS by default.
94 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
95 are generic router options now. The defaults didn't change.
97 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
98 Original patch from Alexander Shikoff, worked over by JH.
100 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
101 files if ZCAT_COMMAND is not executable.
103 JH/26 Bug 1539: Add timout/retry options on dnsdb lookups.
105 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
107 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
108 Normally benign, it bites when the pair was led to by a CNAME;
109 modern usage is to not canoicalize the domain to a CNAME target
110 (and we were inconsistent anyway for A-only vs AAAA+A).
112 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
114 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
115 when evaluating $sender_host_dnssec.
117 JH/31 Check the HELO verification lookup for DNSSEC, adding new
118 $sender_helo_dnssec variable.
120 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
122 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
124 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
126 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
127 documented as working, but never had. Support all but $spam_report.
129 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
130 added for tls authenticator.
135 TL/01 When running the test suite, the README says that variables such as
136 no_msglog_check are global and can be placed anywhere in a specific
137 test's script, however it was observed that placement needed to be near
138 the beginning for it to behave that way. Changed the runtest perl
139 script to read through the entire script once to detect and set these
140 variables, reset to the beginning of the script, and then run through
141 the script parsing/test process like normal.
143 TL/02 The BSD's have an arc4random API. One of the functions to induce
144 adding randomness was arc4random_stir(), but it has been removed in
145 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
146 function when detected.
148 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
149 cause callback expansion.
151 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
152 syntax errors in an expansion can be treated as a string instead of
153 logging or causing an error, due to the internal use of bool_lax
154 instead of bool when processing it.
156 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
157 server certificates when making smtp deliveries.
159 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
161 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
163 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
165 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
166 Merged patch from Sebastian Wiedenroth.
168 JH/05 Fix results-pipe from transport process. Several recipients, combined
169 with certificate use, exposed issues where response data items split
170 over buffer boundaries were not parsed properly. This eventually
171 resulted in duplicates being sent. This issue only became common enough
172 to notice due to the introduction of conection certificate information,
173 the item size being so much larger. Found and fixed by Wolfgang Breyha.
175 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
176 size buffer was used, resulting in syntax errors when an expansion
179 JH/07 Add support for directories of certificates when compiled with a GnuTLS
180 version 3.3.6 or later.
182 JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef
183 is EXPERIMENTAL_EVENT, the main-configuration and transport options
184 both become "event_action", the variables become $event_name, $event_data
185 and $event_defer_errno. There is a new variable $verify_mode, usable in
186 routers, transports and related events. The tls:cert event is now also
187 raised for inbound connections, if the main configuration event_action
190 TL/06 In test suite, disable OCSP for old versions of openssl which contained
191 early OCSP support, but no stapling (appears to be less than 1.0.0).
193 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
194 server certificate names available under the smtp transport option
195 "tls_verify_cert_hostname" now do not permit multi-component wildcard
198 JH/10 Time-related extraction expansions from certificates now use the main
199 option "timezone" setting for output formatting, and are consistent
200 between OpenSSL and GnuTLS compilations. Bug 1541.
202 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
203 encoded parameter in the incoming message. Bug 1558.
205 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
206 include certificate info, eximon was claiming there were spoolfile
209 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
211 JH/14 Log delivery-related information more consistently, using the sequence
212 "H=<name> [<ip>]" wherever possible.
214 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
215 are problematic for Debian distribution, omit them from the release
218 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
220 JH/16 Fix string representation of time values on 64bit time_t anchitectures.
223 JH/17 Fix a null-indirection in certextract expansions when a nondefault
224 output list separator was used.
229 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
230 checkers that were complaining about end of non-void function with no
233 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
234 This was a regression intruduced in 4.83 by another bugfix.
236 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
238 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
239 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
245 TF/01 Correctly close the server side of TLS when forking for delivery.
247 When a message was received over SMTP with TLS, Exim failed to clear up
248 the incoming connection properly after forking off the child process to
249 deliver the message. In some situations the subsequent outgoing
250 delivery connection happened to have the same fd number as the incoming
251 connection previously had. Exim would try to use TLS and fail, logging
252 a "Bad file descriptor" error.
254 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
255 utilities have not been installed.
257 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
258 temporary space as the ACL may create new global variables.
260 TL/01 LDAP support uses per connection or global context settings, depending
261 upon the detected version of the libraries at build time.
263 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
264 to extract and use the src ip:port in logging and expansions as if it
265 were a direct connection from the outside internet. PPv2 support was
266 updated based on HAProxy spec change in May 2014.
268 JH/02 Add ${listextract {number}{list}{success}{fail}}.
270 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
271 Properly escape header and check for NULL return.
273 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
276 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
278 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
279 characters in header names, implemented as a verify condition.
280 Contributed by Michael Fischer v. Mollard.
282 TL/05 Rename SPF condition results err_perm and err_temp to standardized
283 results permerror and temperror. Previous values are deprecated but
284 still accepted. In a future release, err_perm and err_temp will be
285 completely removed, which will be a backward incompatibility if the
286 ACL tests for either of these two old results. Patch contributed by
287 user bes-internal on the mailing list.
289 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
291 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
292 selectors, in both main and reject logs.
294 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
297 JH/07 Add malware type "sock" for talking to simple daemon.
299 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
301 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
302 routers/transports under cutthrough routing.
304 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
305 numbers. Touch up "bool" conditional to keep the same definition.
307 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
309 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
311 JH/12 Expand items in router/transport headers_add or headers_remove lists
312 individually rather than the list as a whole. Bug 1452.
314 Required for reasonable handling of multiple headers_ options when
315 they may be empty; requires that headers_remove items with embedded
316 colons must have them doubled (or the list-separator changed).
318 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
319 view the policy declared in the DMARC record. Currently, $dmarc_status
320 is a combined value of both the record presence and the result of the
323 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
325 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
326 dnslookup router and the smtp transport (applying to the forward
329 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
330 of ldap servers used for a specific lookup. Patch provided by Heiko
333 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
334 New variable $lookup_dnssec_authenticated for observability.
336 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
337 Patch submitted by Lars Timman.
339 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
341 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
342 Requires trusted mode and valid format message id, aborts otherwise.
343 Patch contributed by Heiko Schlichting.
345 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
346 certextract with support for various fields. Bug 1358.
348 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
349 is requested by default, modifiable by smtp transport option
352 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
353 operate on certificate variables to give certificate fingerprints
354 Also new ${sha256:cert_variable}.
356 JH/23 The PRDR feature is moved from being Experimental into the mainline.
358 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
359 Christian Aistleitner.
361 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
363 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
364 file. Patch from Wolfgang Breyha.
366 JH/25 Expand the coverage of the delivery $host and $host_address to
367 client authenticators run in verify callout. Bug 1476.
369 JH/26 Port service names are now accepted for tls_on_connect_ports, to
370 align with daemon_smtp_ports. Bug 72.
372 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
373 support and error reporting did not work properly.
375 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
376 and is readable. Patch from Andrew Colin Kissa.
378 TL/14 Enhance documentation of ${run expansion and how it parses the
379 commandline after expansion, particularly in the case when an
380 unquoted variable expansion results in an empty value.
382 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
384 PP/02 Fix internal collision of T_APL on systems which support RFC3123
385 by renaming away from it. Addresses GH issue 15, reported by
388 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
390 TL/15 SECURITY: prevent double expansion in math comparison functions
391 (can expand unsanitized data). Not remotely exploitable.
398 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
400 PP/02 Make -n do something, by making it not do something.
401 When combined with -bP, the name of an option is not output.
403 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
406 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
407 $sender_host_name and config options to manage this, and basic check
410 PP/05 DSCP support for outbound connections and control modifier for inbound.
412 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
413 (Only plugin which currently uses this is kerberos4, which nobody should
414 be using, but we should make it available and other future plugins might
415 conceivably use it, even though it would break NAT; stuff *should* be
416 using channel bindings instead).
418 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
419 name; added for Sendmail compatibility; requires admin caller.
420 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
421 just ignore it); requires trusted caller.
422 Also parse but ignore: -Ac -Am -X<logfile>
425 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
427 TL/02 Add +smtp_confirmation as a default logging option.
429 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
430 Patch by Magnus Holmgren from 2007-02-20.
432 TL/04 Bugzilla 1281 - Spec typo.
433 Bugzilla 1283 - Spec typo.
434 Bugzilla 1290 - Spec grammar fixes.
436 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
438 TL/06 Add Experimental DMARC support using libopendmarc libraries.
440 TL/07 Fix an out of order global option causing a segfault. Reported to dev
441 mailing list by by Dmitry Isaikin.
443 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
445 JH/02 Support "G" suffix to numbers in ${if comparisons.
447 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
449 NM/01 Bugzilla 1197 - Spec typo
450 Bugzilla 1196 - Spec examples corrections
452 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
454 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
455 gnutls_enable_pkcs11, but renamed to more accurately indicate its
458 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
459 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
461 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
462 "acl {{name}{arg}...}", and optional args on acl condition
465 JH/05 Permit multiple router/transport headers_add/remove lines.
467 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
469 JH/07 Avoid using a waiting database for a single-message-only transport.
470 Performance patch from Paul Fisher. Bugzilla 1262.
472 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
475 JH/09 Add $headers_added variable, with content from use of ACL modifier
476 add_header (but not yet added to the message). Bugzilla 199.
478 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
479 Pulled from Bugzilla 817 by Wolfgang Breyha.
481 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
483 (nb: this is the same fix as in Exim 4.80.1)
485 JH/11 Add A= logging on delivery lines, and a client_set_id option on
488 JH/12 Add optional authenticated_sender logging to A= and a log_selector
491 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
493 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
494 advertise SMTP AUTH mechanism to us, instead of a generic
495 protocol violation error. Also, make Exim more robust to bad
496 data from the Dovecot auth socket.
498 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
500 When a queue runner is handling a message, Exim first routes the
501 recipient addresses, during which it prunes them based on the retry
502 hints database. After that it attempts to deliver the message to
503 any remaining recipients. It then updates the hints database using
506 So if a recipient address works intermittently, it can get repeatedly
507 deferred at routing time. The retry hints record remains fresh so the
508 address never reaches the final cutoff time.
510 This is a fairly common occurrence when a user is bumping up against
511 their storage quota. Exim had some logic in its local delivery code
512 to deal with this. However it did not apply to per-recipient defers
513 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
515 This change adds a proper retry rule check during routing so that the
516 final cutoff time is checked against the message's age. We only do
517 this check if there is an address retry record and there is not a
518 domain retry record; this implies that previous attempts to handle
519 the address had the retry_use_local_parts option turned on. We use
520 this as an approximation for the destination being like a local
521 delivery, as in LMTP.
523 I suspect this new check makes the old local delivery cutoff check
524 redundant, but I have not verified this so I left the code in place.
526 TF/02 Correct gecos expansion when From: is a prefix of the username.
528 Test 0254 submits a message to Exim with the header
532 When I ran the test suite under the user fanf2, Exim expanded
533 the header to contain my full name, whereas it should have added
534 a Resent-Sender: header. It erroneously treats any prefix of the
535 username as equal to the username.
537 This change corrects that bug.
539 GF/01 DCC debug and logging tidyup
540 Error conditions log to paniclog rather than rejectlog.
541 Debug lines prefixed by "DCC: " to remove any ambiguity.
543 TF/03 Avoid unnecessary rebuilds of lookup-related code.
545 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
546 Bug spotted by Jeremy Harris; was flawed since initial commit.
547 Would have resulted in OCSP responses post-SNI triggering an Exim
548 NULL dereference and crash.
550 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
552 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
553 Bug detection, analysis and fix by Samuel Thibault.
554 Bugzilla 1331, Debian bug #698092.
556 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
558 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
559 Server implementation by Todd Lyons, client by JH.
560 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
561 config variable "prdr_enable" controls whether the server
562 advertises the facility. If the client requests PRDR a new
563 acl_data_smtp_prdr ACL is called once for each recipient, after
564 the body content is received and before the acl_smtp_data ACL.
565 The client is controlled by bolth of: a hosts_try_prdr option
566 on the smtp transport, and the server advertisement.
567 Default client logging of deliveries and rejections involving
568 PRDR are flagged with the string "PRDR".
570 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
571 fclose(). Diagnosis by Todd Lyons.
573 PP/17 Update configure.default to handle IPv6 localhost better.
574 Patch by Alain Williams (plus minor tweaks).
577 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
578 This is now consistent with GnuTLS, and is now documented: the
579 previous undocumented portable approach to treating the option as
580 unset was to force an expansion failure. That still works, and
581 an empty string is now equivalent.
583 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
584 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
585 not performing validation itself.
587 PP/20 Added force_command boolean option to pipe transport.
588 Patch from Nick Koston, of cPanel Inc.
590 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
593 TF/04 Added udpsend ACL modifer and hexquote expansion operator
595 PP/21 Fix eximon continuous updating with timestamped log-files.
596 Broken in a format-string cleanup in 4.80, missed when I repaired the
597 other false fix of the same issue.
598 Report and fix from Heiko Schlichting.
601 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
602 Report from Prashanth Katuri.
604 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
605 It's SecureTransport, so affects any MacOS clients which use the
606 system-integrated TLS libraries, including email clients.
608 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
609 using a MIME ACL for non-SMTP local injection.
610 Report and assistance in diagnosis by Warren Baker.
612 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
614 JH/16 Fix comparisons for 64b. Bugzilla 1385.
616 TL/09 Add expansion variable $authenticated_fail_id to keep track of
617 last id that failed so it may be referenced in subsequent ACL's.
619 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
622 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
623 ldap library initialization, allowing self-signed CA's to be
624 used. Also properly sets require_cert option later in code by
625 using NULL (global ldap config) instead of ldap handle (per
626 session). Bug diagnosis and testing by alxgomz.
628 TL/12 Enhanced documentation in the ratelimit.pl script provided in
629 the src/util/ subdirectory.
631 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
632 renamed to Transport Post Delivery Action by Jeremy Harris, as
635 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
636 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
637 redis_servers = needs to be configured which will be used by the redis
638 lookup. Patch from Warren Baker, of The Packet Hub.
640 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
642 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
643 hostname or reverse DNS when processing a host list. Used suggestions
644 from multiple comments on this bug.
646 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
648 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
649 Missed a few lines, added it to make the runtest require no keyboard
652 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
653 contains upper case chars. Make router use caseful_local_part.
655 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
656 support when GnuTLS has been built with p11-kit.
662 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
664 This, or similar/improved, will also be change PP/11 of 4.82.
670 PP/01 Handle short writes when writing local log-files.
671 In practice, only affects FreeBSD (8 onwards).
672 Bugzilla 1053, with thanks to Dmitry Isaikin.
674 NM/01 Bugzilla 949 - Documentation tweak
676 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
679 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
681 PP/02 Implemented gsasl authenticator.
683 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
685 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
686 `pkg-config foo` for cflags/libs.
688 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
689 with rest of GSASL and with heimdal_gssapi.
691 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
692 `pkg-config foo` for cflags/libs for the TLS implementation.
694 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
695 properties get this fed in as external SSF. A number of robustness
696 and debugging improvements to the cyrus_sasl authenticator.
698 PP/08 cyrus_sasl server now expands the server_realm option.
700 PP/09 Bugzilla 1214 - Log authentication information in reject log.
701 Patch by Jeremy Harris.
703 PP/10 Added dbmjz lookup type.
705 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
707 PP/12 MAIL args handles TAB as well as SP, for better interop with
708 non-compliant senders.
709 Analysis and variant patch by Todd Lyons.
711 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
712 Bug report from Lars Müller <lars@samba.org> (via SUSE),
713 Patch from Dirk Mueller <dmueller@suse.com>
715 PP/13 tls_peerdn now print-escaped for spool files.
716 Observed some $tls_peerdn in wild which contained \n, which resulted
717 in spool file corruption.
719 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
720 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
721 or write after TLS renegotiation, which otherwise led to messages
724 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
725 as a tracking header (ie: a signed header comes before the signature).
726 Patch from Wolfgang Breyha.
728 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
729 comma-sep list; embedded commas doubled.
731 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
733 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
735 Report and patch from Dmitry Banschikov.
737 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
738 Removed SSL_clear() after SSL_new() which led to protocol negotiation
739 failures. We appear to now support TLS1.1+ with Exim.
741 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
742 lets Exim select keys and certificates based upon TLS SNI from client.
743 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
744 before an outbound SMTP session. New log_selector, +tls_sni.
746 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
747 NULL dereference. Report and patch from Alun Jones.
749 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
750 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
751 Not seeing resolver debug output on NetBSD, but suspect this is a
752 resolver implementation change.
754 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
755 Left warnings. Added "eximon gdb" invocation mode.
757 PP/21 Defaulting "accept_8bitmime" to true, not false.
759 PP/22 Added -bw for inetd wait mode support.
761 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
762 locate the relevant includes and libraries. Made this the default.
764 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
765 Bugzilla 1246, report and most of solution from Tomasz Kusy.
767 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
768 This may cause build issues on older platforms.
770 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
771 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
772 gnutls_require_mac & gnutls_require_protocols (no longer supported).
773 Added SNI support via GnuTLS too.
774 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
776 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
778 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
779 Applied second patch from Janne, implementing suggestion to default
780 multiple-strings-in-record handling to match SPF spec.
782 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
784 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
785 read-only, out of scope).
786 Patch from Wolfgang Breyha, report from Stuart Northfield.
788 PP/29 Fix three issues highlighted by clang analyser static analysis.
789 Only crash-plausible issue would require the Cambridge-specific
790 iplookup router and a misconfiguration.
791 Report from Marcin Mirosław.
793 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
795 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
796 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
797 As part of this, removing so much warning spew let me fix some minor
798 real issues in debug logging.
800 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
801 assignment on my part. Fixed.
803 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
804 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
805 Janne Snabb (who went above and beyond: thank you).
807 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
808 string otherwise requires a connection and a bunch more work and it's
809 relatively easy to get wrong. Should also expose TLS library linkage
812 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
813 64-bit ${eval} (JH/03).
815 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
816 GNU libc to support some of the 64-bit stuff, should not lead to
817 conflicts. Defined before os.h is pulled in, so if a given platform
818 needs to override this, it can.
820 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
821 protection layer was required, which is not implemented.
822 Bugzilla 1254, patch from Wolfgang Breyha.
824 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
825 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
826 tls_dhparam take prime identifiers. Also unbreak combination of
827 OpenSSL+DH_params+TLSSNI.
829 PP/39 Disable SSLv2 by default in OpenSSL support.
835 PP/01 Solaris build fix for Oracle's LDAP libraries.
836 Bugzilla 1109, patch from Stephen Usher.
838 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
840 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
843 TF/02 Fix a couple more cases where we did not log the error message
844 when unlink() failed. See also change 4.74-TF/03.
846 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
847 lock up or crash if it happened to be inside a call to libc when it
848 got a SIGUSR1 from exiwhat.
850 The SIGUSR1 handler appends the current process status to the process
851 log which is later printed by exiwhat. It used to use the general
852 purpose logging code to do this, but several functions it calls are
853 not safe for signals.
855 The new output code in the SIGUSR1 handler is specific to the process
856 log, and simple enough that it's easy to inspect for signal safety.
857 Removing some special cases also simplifies the general logging code.
858 Removing the spurious timestamps from the process log simplifies
861 TF/04 Improved ratelimit ACL condition.
863 The /noupdate option has been deprecated in favour of /readonly which
864 has clearer semantics. The /leaky, /strict, and /readonly update modes
865 are mutually exclusive. The update mode is no longer included in the
866 database key; it just determines when the database is updated. (This
867 means that when you upgrde Exim will forget old rate measurements.)
869 Exim now checks that the per_* options are used with an update mode that
870 makes sense for the current ACL. For example, when Exim is processing a
871 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
872 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
873 must specify per_mail/readonly. If you omit the update mode it defaults to
874 /leaky where that makes sense (as before) or /readonly where required.
876 The /noupdate option is now undocumented but still supported for
877 backwards compatibility. It is equivalent to /readonly except that in
878 ACLs where /readonly is required you may specify /leaky/noupdate or
879 /strict/noupdate which are treated the same as /readonly.
881 A useful new feature is the /count= option. This is a generalization
882 of the per_byte option, so that you can measure the throughput of other
883 aggregate values. For example, the per_byte option is now equivalent
884 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
886 The per_rcpt option has been generalized using the /count= mechanism
887 (though it's more complicated than the per_byte equivalence). When it is
888 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
889 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
890 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
891 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
892 Note that using per_rcpt with a non-readonly update mode in more than
893 one ACL will cause the recipients to be double-counted. (The per_mail
894 and per_byte options don't have this problem.)
896 The handling of very low rates has changed slightly. If the computed rate
897 is less than the event's count (usually one) then this event is the first
898 after a long gap. In this case the rate is set to the same as this event's
899 count, so that the first message of a spam run is counted properly.
901 The major new feature is a mechanism for counting the rate of unique
902 events. The new per_addr option counts the number of different
903 recipients that someone has sent messages to in the last time period. It
904 behaves like per_rcpt if all the recipient addresses are different, but
905 duplicate recipient addresses do not increase the measured rate. Like
906 the /count= option this is a general mechanism, so the per_addr option
907 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
908 example, measure the rate that a client uses different sender addresses
909 with the options per_mail/unique=$sender_address. There are further
910 details in the main documentation.
912 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
914 TF/06 Removed a few PCRE remnants.
916 TF/07 Automatically extract Exim's version number from tags in the git
917 repository when doing development or release builds.
919 PP/02 Raise smtp_cmd_buffer_size to 16kB.
920 Bugzilla 879. Patch from Paul Fisher.
922 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
923 Heavily based on revision 40f9a89a from Simon Arlott's tree.
926 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
928 PP/05 Variable $av_failed, true if the AV scanner deferred.
929 Bugzilla 1078. Patch from John Horne.
931 PP/06 Stop make process more reliably on build failure.
932 Bugzilla 1087. Patch from Heiko Schlittermann.
934 PP/07 Make maildir_use_size_file an _expandable_ boolean.
935 Bugzilla 1089. Patch from Heiko Schlittermann.
937 PP/08 Handle ${run} returning more data than OS pipe buffer size.
938 Bugzilla 1131. Patch from Holger Weiß.
940 PP/09 Handle IPv6 addresses with SPF.
941 Bugzilla 860. Patch from Wolfgang Breyha.
943 PP/10 GnuTLS: support TLS 1.2 & 1.1.
945 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
948 PP/11 match_* no longer expand right-hand-side by default.
949 New compile-time build option, EXPAND_LISTMATCH_RHS.
950 New expansion conditions, "inlist", "inlisti".
952 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
954 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
956 PP/14 fix log_write() format string regression from TF/03.
957 Bugzilla 1152. Patch from Dmitry Isaikin.
963 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
965 PP/02 Harmonised TLS library version reporting; only show if debugging.
966 Layout now matches that introduced for other libraries in 4.74 PP/03.
968 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
970 PP/04 New "dns_use_edns0" global option.
972 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
975 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
976 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
978 TK/01 Updated PolarSSL code to 0.14.2.
979 Bugzilla 1097. Patch from Andreas Metzler.
981 PP/07 Catch divide-by-zero in ${eval:...}.
984 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
987 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
988 format-string attack -- SECURITY: remote arbitrary code execution.
990 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
991 time unintentionally subject to list matching rules, letting the header
992 cause arbitrary Exim lookups (of items which can occur in lists, *not*
993 arbitrary string expansion). This allowed for information disclosure.
995 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
996 INT_MIN/-1 -- value coerced to INT_MAX.
1002 NM/01 Workround for PCRE version dependency in version reporting
1005 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1006 This fixes portability to compilers other than gcc, notably
1007 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1009 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1010 makefiles for portability to HP-UX and POSIX correctness.
1012 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1013 Also via indented variable definition in the Makefile.
1014 (Debugging by Oliver Heesakkers).
1016 PP/02 Restore caching of spamd results with expanded spamd_address.
1017 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1019 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1020 Improves build reliability. Fix from: Frank Elsner
1022 NM/02 Fix wide character breakage in the rfc2047 coding
1023 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1025 NM/03 Allow underscore in dnslist lookups
1026 Fixes bug 1026. Patch from Graeme Fowler
1028 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1029 Code patches from Adam Ciarcinski of NetBSD.
1031 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1034 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1035 is logged, to avoid truncation. Patch from John Horne.
1037 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1038 Patch from Jakob Hirsch.
1040 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1041 SQL string expansion failure details.
1042 Patch from Andrey Oktyabrski.
1044 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1045 Patch from Simon Arlott.
1047 PP/09 New lookups functionality failed to compile on old gcc which rejects
1048 extern declarations in function scope.
1049 Patch from Oliver Fleischmann
1051 PP/10 Use sig_atomic_t for flags set from signal handlers.
1052 Check getgroups() return and improve debugging.
1053 Fixed developed for diagnosis in bug 927 (which turned out to be
1056 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1057 Patch from Mark Zealey.
1059 PP/12 Bugzilla 1056: Improved spamd server selection.
1060 Patch from Mark Zealey.
1062 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1063 Based on patch from Heiko Schlittermann.
1065 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1066 Patch from Uwe Doering, sign-off by Michael Haardt.
1068 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1069 variable declaration deep within a block. Bug and patch from
1072 PP/15 lookups-Makefile IRIX compatibilty coercion.
1074 PP/16 Make DISABLE_DKIM build knob functional.
1076 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1077 Patch by Simon Arlott
1079 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1080 variable argument macros. Our copy now differs from upstream.
1086 TF/01 Failure to get a lock on a hints database can have serious
1087 consequences so log it to the panic log.
1089 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1090 controlled using the smtp_confirmation log selector.
1092 TF/03 Include the error message when we fail to unlink a spool file.
1094 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1095 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1096 for maintaining out-of-tree patches for some time.
1098 PP/01 Bugzilla 139: Documentation and portability issues.
1099 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1100 Handle per-OS dynamic-module compilation flags.
1102 PP/02 Let /dev/null have normal permissions.
1103 The 4.73 fixes were a little too stringent and complained about the
1104 permissions on /dev/null. Exempt it from some checks.
1105 Reported by Andreas M. Kirchwitz.
1107 PP/03 Report version information for many libraries, including
1108 Exim version information for dynamically loaded libraries. Created
1109 version.h, now support a version extension string for distributors
1110 who patch heavily. Dynamic module ABI change.
1112 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1113 privilege escalation vulnerability whereby the Exim run-time user
1114 can cause root to append content of the attacker's choosing to
1117 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1120 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1121 If dropping privileges for untrusted macros, we disabled normal logging
1122 on the basis that it would fail; for the Exim run-time user, this is not
1123 the case, and it resulted in successful deliveries going unlogged.
1124 Fixed. Reported by Andreas Metzler.
1130 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1131 only prepend for the Resent-* case. Fixes regression introduced in
1132 Exim 4.70 by NM/22 for Bugzilla 607.
1134 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1135 increasing numbers of administrators be bitten by this.
1137 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1139 PP/03 Bugzilla 994: added openssl_options main configuration option.
1141 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1143 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1145 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1147 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1148 without a peer certificate, leading to a segfault because of an
1149 assumption that peers always have certificates. Be a little more
1150 paranoid. Problem reported by Martin Tscholak.
1152 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1153 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1154 NB: ClamAV planning to remove STREAM in "middle of 2010".
1155 CL also introduces -bmalware, various -d+acl logging additions and
1156 more caution in buffer sizes.
1158 PP/09 Implemented reverse_ip expansion operator.
1160 PP/10 Bugzilla 937: provide a "debug" ACL control.
1162 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1164 PP/12 Bugzilla 973: Implement --version.
1166 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1168 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1170 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1172 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1173 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1174 ignore trailing whitespace.
1176 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1178 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1181 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1182 Notification from Dr Andrew Aitchison.
1184 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1185 ExtendedDetectionInfo response format.
1186 Notification from John Horne.
1188 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1191 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1192 XSL and documented dependency on system catalogs, with examples of how
1195 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1198 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1199 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1200 configuration file which is writeable by the Exim user or group.
1202 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1203 of configuration files to cover files specified with the -C option if
1204 they are going to be used with root privileges, not just the default
1207 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1208 option (effectively making it always true).
1210 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1211 files to be used while preserving root privileges.
1213 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1214 that rogue child processes cannot use them.
1216 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1217 run-time user, instead of root.
1219 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1220 Exim run-time user without dropping privileges.
1222 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1223 result string, instead of calling string_vformat() twice with the same
1226 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1227 for other users. Others should always drop root privileges if they use
1228 -C on the command line, even for a whitelisted configure file.
1230 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1232 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1238 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1239 $data_path, and $header_path variables; fixed documentation bugs and
1242 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1243 exipick to access non-standard spools, including the "frozen" queue
1246 NM/01 Bugzilla 965: Support mysql stored procedures.
1247 Patch from Alain Williams
1249 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1251 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1252 Patch from Andreas Metzler
1254 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1255 Patch from Kirill Miazine
1257 NM/05 Bugzilla 671: Added umask to procmail example.
1259 JJ/03 installed exipick 20100323.0, fixing doc bug
1261 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1262 directory. Notification and patch from Dan Rosenberg.
1264 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1266 TK/02 Improve log output when DKIM signing operation fails.
1268 MH/01 Treat the transport option dkim_domain as a colon separated
1269 list, not as a single string, and sign the message with each element,
1270 omitting multiple occurences of the same signer.
1272 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1273 Bugzilla 985, 986. Patch by Simon Arlott
1275 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1276 Patch by Simon Arlott
1278 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1279 MBX locking. Notification from Dan Rosenberg.
1285 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1287 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1289 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1291 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1293 NM/04 Bugzilla 915: Flag broken perl installation during build.
1299 TK/01 Added patch by Johannes Berg that expands the main option
1300 "spamd_address" if it starts with a dollar sign.
1302 TK/02 Write list of recipients to X-Envelope-Sender header when building
1303 the mbox-format spool file for content scanning (suggested by Jakob
1306 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1307 (http://www.dcc-servers.net/) support via dccifd. Activated by
1308 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1310 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1311 by Mark Daniel Reidel <mr@df.eu>.
1313 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1314 When building exim an external PCRE library is now needed -
1315 PCRE is a system library on the majority of modern systems.
1316 See entry on PCRE_LIBS in EDITME file.
1318 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1319 conversation. Added nologin parameter to request.
1320 Patch contributed by Kirill Miazine.
1322 TF/01 Do not log submission mode rewrites if they do not change the address.
1324 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1326 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1327 log files in place. Contributed by Roberto Lima.
1329 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1331 TF/03 Bugzilla 615: When checking the local_parts router precondition
1332 after a local_part_suffix or local_part_prefix option, Exim now
1333 does not use the address's named list lookup cache, since this
1334 contains cached lookups for the whole local part.
1336 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1337 Robert Millan. Documentation is in experimental-spec.txt.
1339 TF/04 Bugzilla 668: Fix parallel build (make -j).
1341 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1343 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1344 Patch provided by Jan Srzednicki.
1346 TF/05 Leading white space used to be stripped from $spam_report which
1347 wrecked the formatting. Now it is preserved.
1349 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1350 that they are available at delivery time.
1352 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1354 TF/08 TLS error reporting now respects the incoming_interface and
1355 incoming_port log selectors.
1357 TF/09 Produce a more useful error message if an SMTP transport's hosts
1358 setting expands to an empty string.
1360 NM/06 Bugzilla 744: EXPN did not work under TLS.
1361 Patch provided by Phil Pennock.
1363 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1364 Patch provided by Richard Godbee.
1366 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1367 acl_smtp_notquit, added index entry.
1369 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1370 Patch provided by Eugene Bujak.
1372 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1373 accept(). Patch provided by Maxim Dounin.
1375 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1376 Patch provided by Phil Pennock.
1378 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1380 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1381 Patch provided by Brad "anomie" Jorsch.
1383 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1384 Patch provided by Dean Brooks.
1386 TK/05 Add native DKIM support (does not depend on external libraries).
1388 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1389 Patch provided by Graeme Fowler.
1391 NM/16 Bugzilla 851: Documentation example syntax fix.
1393 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1395 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1398 NM/19 Bugzilla 745: TLS version reporting.
1399 Patch provided by Phil Pennock.
1401 NM/20 Bugzilla 167: bool: condition support.
1402 Patch provided by Phil Pennock.
1404 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1405 clients. Patch provided by Phil Pennock.
1407 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1408 Patch provided by Brad "anomie" Jorsch.
1410 NM/23 Bugzilla 687: Fix misparses in eximstats.
1411 Patch provided by Heiko Schlittermann.
1413 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1414 Patch provided by Heiko Schlittermann.
1416 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1417 plus update to original patch.
1419 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1421 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1422 Patch provided by David Brownlee.
1424 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1426 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1428 NM/30 Bugzilla 888: TLS documentation bugfixes.
1430 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1432 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1433 Unlike the original bugzilla I have changed all shell scripts in src tree.
1435 NM/33 Bugzilla 898: Transport filter timeout fix.
1436 Patch by Todd Rinaldo.
1438 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1439 Patch by Serge Demonchaux.
1441 NM/35 Bugzilla 39: Base64 decode bug fixes.
1442 Patch by Jakob Hirsch.
1444 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1446 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1448 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1450 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1456 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1457 ALT-N's libdkim that I have put here:
1458 http://duncanthrax.net/exim-experimental/
1460 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1461 were called 'true' and it seems that C99 defines that as a reserved
1462 keyword to be used with 'bool' variable types. That means you could
1463 not include C99-style headers which use bools without triggering
1464 build errors in sieve.c.
1466 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1467 as mailq or other aliases. Changed the --help handling significantly
1468 to do whats expected. exim_usage() emits usage/help information.
1470 SC/01 Added the -bylocaldomain option to eximstats.
1472 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1474 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1476 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1482 PH/01 Another patch from the Sieve maintainer.
1484 PH/02 When an IPv6 address is converted to a string for single-key lookup
1485 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1486 dots are used instead of colons so that keys in lsearch files need not
1487 contain colons. This was done some time before quoting was made available
1488 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1489 (notated using the quote facility) so as to distinguish them from IPv4
1490 keys. This meant that lookups for IP addresses in host lists did not work
1491 for iplsearch lookups.
1493 This has been fixed by arranging for IPv6 addresses to be expressed with
1494 colons if the lookup type is iplsearch. This is not incompatible, because
1495 previously such lookups could never work.
1497 The situation is now rather anomolous, since one *can* have colons in
1498 ordinary lsearch keys. However, making the change in all cases is
1499 incompatible and would probably break a number of configurations.
1501 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1504 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1505 conversion specification without a maximum field width, thereby enabling
1506 a rogue spamd server to cause a buffer overflow. While nobody in their
1507 right mind would setup Exim to query an untrusted spamd server, an
1508 attacker that gains access to a server running spamd could potentially
1509 exploit this vulnerability to run arbitrary code as the Exim user.
1511 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1512 $primary_hostname instead of what libspf2 thinks the hosts name is.
1514 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1515 a directory entry by the name of the lookup key. Previously, if a
1516 symlink pointed to a non-existing file or a file in a directory that
1517 Exim lacked permissions to read, a lookup for a key matching that
1518 symlink would fail. Now it is enough that a matching directory entry
1519 exists, symlink or not. (Bugzilla 503.)
1521 PH/03 The body_linecount and body_zerocount variables are now exported in the
1524 PH/04 Added the $dnslist_matched variable.
1526 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1527 This means they are set thereafter only if the connection becomes
1530 PH/06 Added the client_condition to authenticators so that some can be skipped
1531 by clients under certain conditions.
1533 PH/07 The error message for a badly-placed control=no_multiline_responses left
1534 "_responses" off the end of the name.
1536 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1538 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1539 (without spaces) instead of just copying the configuration text.
1541 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1543 PH/11 Added $max_received_linelength.
1545 PH/12 Added +ignore_defer and +include_defer to host lists.
1547 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1548 way in which PCRE > 7.0 is built.
1550 PH/14 Implemented queue_only_load_latch.
1552 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1553 MAIL command. The effect was to mangle the value on 64-bit systems.
1555 PH/16 Another patch from the Sieve maintainer.
1557 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1559 PH/18 If a system quota error occurred while trying to create the file for
1560 a maildir delivery, the message "Mailbox is full" was not appended to the
1561 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1562 only to a quota excession during the actual writing of the file.
1564 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1565 characters?) which causes problems in log lines. The DN values are now
1566 passed through string_printing() before being added to log lines.
1568 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1569 and InterBase are left for another time.)
1571 PH/21 Added message_body_newlines option.
1573 PH/22 Guard against possible overflow in moan_check_errorcopy().
1575 PH/23 POSIX allows open() to be a macro; guard against that.
1577 PH/24 If the recipient of an error message contained an @ in the local part
1578 (suitably quoted, of course), incorrect values were put in $domain and
1579 $local_part during the evaluation of errors_copy.
1585 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1586 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1589 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1590 issue a MAIL command.
1592 PH/02 In an ACL statement such as
1594 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1596 if a client was not listed at all, or was listed with a value other than
1597 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1598 the condition was not true (as it should be), so access was not denied.
1599 The bug was that the ! inversion was incorrectly passed on to the second
1600 item. This has been fixed.
1602 PH/03 Added additional dnslists conditions == and =& which are different from
1603 = and & when the dns lookup returns more than one IP address.
1605 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1606 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1608 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1609 FSYNC, which compiles an option called disable_fsync that allows for
1610 bypassing fsync(). The documentation is heavily laced with warnings.
1612 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1614 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1615 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1616 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1617 including adding "make clean"; (3) Added -fPIC when compiling the test
1618 dynamically loaded module, to get rid of a warning.
1620 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1621 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1622 = 0s. The bug is otherwise harmless.
1624 PH/07 There was a bug in the dovecot authenticator such that the value of
1625 $auth1 could be overwritten, and so not correctly preserved, after a
1626 successful authentication. This usually meant that the value preserved by
1627 the server_setid option was incorrect.
1629 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1631 PH/09 Installed PCRE release 7.0.
1633 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1634 run for batched SMTP input. It is now run at the start of every message
1635 in the batch. While fixing this I discovered that the process information
1636 (output by running exiwhat) was not always getting set for -bs and -bS
1637 input. This is fixed, and it now also says "batched" for BSMTP.
1639 PH/11 Added control=no_pipelining.
1641 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1642 patch, slightly modified), and move the expansion of helo_data till after
1643 the connection is made in the smtp transport (so it can use these
1646 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1648 PH/14 Added log_selector = +pid.
1650 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1652 PH/16 Add ${if forany and ${if forall.
1654 PH/17 Added dsn_from option to vary the From: line in DSNs.
1656 PH/18 Flush SMTP output before performing a callout, unless control =
1657 no_callout_flush is set.
1659 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1660 was true (the default) a successful delivery failed to delete the retry
1661 item, thus causing premature timeout of the address. The bug is now
1664 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1666 PH/21 Long custom messages for fakedefer and fakereject are now split up
1667 into multiline reponses in the same way that messages for "deny" and
1668 other ACL rejections are.
1670 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1671 with slight modification.
1673 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1674 draft, changing the syntax and factoring some duplicate code".
1676 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1677 for deliveries of the second and subsequent messages over the same SMTP
1680 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1681 ${reduce, with only minor "tidies".
1683 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1685 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1686 expansion side effects.
1688 PH/27 When a message times out after an over-quota error from an Exim-imposed
1689 quota, the bounce message says "mailbox is full". This message was not
1690 being given when it was a system quota that was exceeded. It now should
1693 MH/03 Made $recipients available in local_scan(). local_scan() already has
1694 better access to the recipient list through recipients_list[], but
1695 $recipients can be useful in postmaster-provided expansion strings.
1697 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1698 in the case of a MAIL command with additional options following the
1699 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1700 were accidentally chopped off.
1702 PH/29 SMTP synchronization checks are implemented when a command is read -
1703 there is a check that no more input is waiting when there shouldn't be
1704 any. However, for some commands, a delay in an ACL can mean that it is
1705 some time before the response is written. In this time, more input might
1706 arrive, invalidly. So now there are extra checks after an ACL has run for
1707 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1708 pipelining has not been advertised.
1710 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1712 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1713 returned in the SMTP response when smtp_return_error_details was false.
1714 This has been fixed.
1716 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1717 instead of the C I/O that was originally supplied, because problems were
1718 reported on Solaris.
1720 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1721 Exim which did not show up earlier: it was assuming that a call to
1722 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1723 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1724 was a macro that became an assignment, so it seemed to work. This has
1725 changed to a proper function call with a void return, hence the compile
1726 error. Exim's code has been fixed.
1728 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1731 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1733 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1735 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1736 because it turns out to be too big or there is a timeout) there is no
1737 "Completed" line in the log. When some messages of this type were
1738 selected by exigrep, they were listed as "not completed". Others were
1739 picked up by some special patterns. I have improved the selection
1740 criteria to be more general.
1742 PH/38 The host_find_failed option in the manualroute router can now be set
1743 to "ignore", to completely ignore a host whose IP address cannot be
1744 found. If all hosts are ignored, the behaviour is controlled by the new
1745 host_all_ignored option.
1747 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1748 homing or because of multiple MX records with /mx) generated more than
1749 one IP address, and the following item turned out to be the local host,
1750 all the secondary addresses of the first item were incorrectly removed
1751 from the list, along with the local host and any following hosts (which
1752 is what is supposed to happen).
1754 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1755 whoever called Exim into the -H file. In the case of the daemon it was
1756 behaving confusingly. When first started, it used values for whoever
1757 started the daemon, but after a SIGHUP it used the Exim user (because it
1758 calls itself on a restart). I have changed the code so that it now always
1761 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1762 message are rejected with the same error (e.g. no authentication or bad
1763 sender address), and a DATA command is nevertheless sent (as can happen
1764 with PIPELINING or a stupid MUA), the error message that was given to the
1765 RCPT commands is included in the rejection of the DATA command. This is
1766 intended to be helpful for MUAs that show only the final error to their
1769 PH/42 Another patch from the Sieve maintainer.
1771 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1772 Eximstats - Fixed some broken HTML links and added missing column headers
1774 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1775 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1777 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1779 PH/43 Yet another patch from the Sieve maintainer.
1781 PH/44 I found a way to check for a TCP/IP connection going away before sending
1782 the response to the final '.' that terminates a message, but only in the
1783 case where the client has not sent further data following the '.'
1784 (unfortunately, this is allowed). However, in many cases there won't be
1785 any further data because there won't be any more messages to send. A call
1786 to select() can be used: if it shows that the input is "ready", there is
1787 either input waiting, or the socket has been closed. An attempt to read
1788 the next input character can distinguish the two cases. Previously, Exim
1789 would have sent an OK response which the client would never have see.
1790 This could lead to message repetition. This fix should cure that, at
1791 least in a lot of common cases.
1793 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1794 advertised in response to EHLO.
1800 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1801 fixed by 4.65/MH/01 (is this a record?) are fixed:
1803 (i) An empty string was always treated as zero by the numeric comparison
1804 operators. This behaviour has been restored.
1806 (ii) It is documented that the numeric comparison operators always treat
1807 their arguments as decimal numbers. This was broken in that numbers
1808 starting with 0 were being interpreted as octal.
1810 While fixing these problems I realized that there was another issue that
1811 hadn't been noticed. Values of message_size_limit (both the global option
1812 and the transport option) were treated as octal if they started with 0.
1813 The documentation was vague. These values are now always treated as
1814 decimal, and I will make that clear in the documentation.
1820 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1821 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1824 MH/01 Don't check that the operands of numeric comparison operators are
1825 integers when their expansion is in "skipping" mode (fixes bug
1826 introduced by 4.64-PH/07).
1828 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1829 child addresses, Exim now panics and dies. Previously, because the count
1830 is held in a short int, deliveries were likely to be lost. As such a
1831 large number of recipients for a single message is ridiculous
1832 (performance will be very, very poor), I have chosen to impose a limit
1833 rather than extend the field.
1839 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1840 leftover -K file (the existence of which was triggered by #402).
1841 While we were at it, introduced process PID as part of the -K
1842 filename. This should rule out race conditions when creating
1845 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1846 processing considerably. Previous code took too long for large mails,
1847 triggering a timeout which in turn triggers #401.
1849 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1850 in the DK code in transports.c. sendfile() is not really portable,
1851 hence the _LINUX specificness.
1853 TF/01 In the add_headers option to the mail command in an Exim filter,
1854 there was a bug that Exim would claim a syntax error in any
1855 header after the first one which had an odd number of characters
1858 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1859 callout verification, Exim cached a "reject" for the entire domain. This
1860 is correct for most verifications, but it is not correct for a recipient
1861 verification with use_sender or use_postmaster set, because in that case
1862 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1863 case of MAIL FROM:<> rejection from other early rejections (e.g.
1864 rejection of HELO). When verifying a recipient using a non-null MAIL
1865 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1866 Whatever the result of the callout, the value of the domain cache is
1867 left unchanged (for any other kind of callout, getting as far as trying
1868 RCPT means that the domain itself is ok).
1870 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1873 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1874 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1875 session, the daemon ignores ECONNECT errors and logs others; it now
1876 ignores EPIPE as well.
1878 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1879 (quoted-printable decoding).
1881 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1882 later the small subsequent patch to fix an introduced bug.
1884 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1886 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1888 PH/08 An error is now given if message_size_limit is specified negative.
1890 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1891 to be given (somewhat) arbitrary names.
1893 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1896 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1897 miscellaneous code fixes
1899 PH/10 Added the log_reject_target ACL modifier to specify where to log
1902 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1903 hostname. This is wrong, because it relates to the incoming message (and
1904 probably the interface on which it is arriving) and not to the outgoing
1905 callout (which could be using a different interface). This has been
1906 changed to use the value of the helo_data option from the smtp transport
1907 instead - this is what is used when a message is actually being sent. If
1908 there is no remote transport (possible with a router that sets up host
1909 addresses), $smtp_active_hostname is used.
1911 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1912 tweaks were necessary in order to get it to work (see also 21 below):
1913 (a) The code assumed that strncpy() returns a negative number on buffer
1914 overflow, which isn't the case. Replaced with Exim's string_format()
1916 (b) There were several signed/unsigned issues. I just did the minimum
1917 hacking in of casts. There is scope for a larger refactoring.
1918 (c) The code used strcasecmp() which is not a standard C function.
1919 Replaced with Exim's strcmpic() function.
1920 (d) The code set only $1; it now sets $auth1 as well.
1921 (e) A simple test gave the error "authentication client didn't specify
1922 service in request". It would seem that Dovecot has changed its
1923 interface. Fortunately there's a specification; I followed it and
1924 changed what the client sends and it appears to be working now.
1926 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1929 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1930 address A is aliased to B and C, where B exists and C does not. Without
1931 -v the output is "A verified" because verification stops after a
1932 successful redirection if more than one address is generated. However,
1933 with -v the child addresses are also verified. Exim was outputting "A
1934 failed to verify" and then showing the successful verification for C,
1935 with its parentage. It now outputs "B failed to verify", showing B's
1936 parentage before showing the successful verification of C.
1938 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1939 look up a TXT record in a specific list after matching in a combined
1942 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1943 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1944 they consult the DNS. I had assumed they would set it the way they
1945 wanted; and indeed my experiments on Linux seem to show that in some
1946 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1947 To be on the safe side, however, I have now made the interface to
1948 host_find_byname() similar to host_find_bydns(), with an argument
1949 containing the DNS resolver options. The host_find_byname() function now
1950 sets these options at its start, just as host_find_bydns() does. The smtp
1951 transport options dns_qualify_single and dns_search_parents are passed to
1952 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1953 of host_find_byname() use the default settings of RES_DEFNAMES
1954 (qualify_single) but not RES_DNSRCH (search_parents).
1956 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1957 spool_read_header() do less string testing, by means of a preliminary
1958 switch on the second character of optional "-foo" lines. (This is
1959 overdue, caused by the large number of possibilities that now exist.
1960 Originally there were few.) While I was there, I also converted the
1961 str(n)cmp tests so they don't re-test the leading "-" and the first
1962 character, in the hope this might squeeze out yet more improvement.
1964 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1965 flag allowing group syntax was set by the header_syntax check but not
1966 turned off, possible causing trouble later; (2) The flag was not being
1967 set at all for the header_verify test, causing "group"-style headers to
1968 be rejected. I have now set it in this case, and also caused header_
1969 verify to ignore an empty address taken from a group. While doing this, I
1970 came across some other cases where the code for allowing group syntax
1971 while scanning a header line wasn't quite right (mostly, not resetting
1972 the flag correctly in the right place). These bugs could have caused
1973 trouble for malformed header lines. I hope it is now all correct.
1975 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1976 with the "reply" argument non-NULL. The code, however (which originally
1977 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1978 but it didn't always do it. This confused somebody who was copying the
1979 code for some other use. I have removed all the tests.
1981 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1982 feature that was used to support insecure browsers during the U.S. crypto
1983 embargo. It requires special client support, and Exim is probably the
1984 only MTA that supported it -- and would never use it because real RSA is
1985 always available. This code has been removed, because it had the bad
1986 effect of slowing Exim down by computing (never used) parameters for the
1987 RSA_EXPORT functionality.
1989 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1990 authenticator to fail if there's a tab character in the incoming data
1991 (there should never be unless someone is messing about, as it's supposed
1992 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1993 if the connection is using TLS or if the remote IP is the same as the
1994 local IP, and the "valid-client-cert option" if a client certificate has
1997 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1998 authenticators. This can be used for authorization after authentication
1999 succeeds. (In the case of plaintext, it servers for both authentication
2002 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2003 if any retry times were supplied.
2005 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2006 connection, where there is no client IP address to check. In this
2007 situation, the verify now always succeeds.
2009 PH/25 Applied John Jetmore's -Mset patch.
2011 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2013 PH/27 In a string expansion for a processed (not raw) header when multiple
2014 headers of the same name were present, leading whitespace was being
2015 removed from all of them, but trailing whitespace was being removed only
2016 from the last one. Now trailing whitespace is removed from each header
2017 before concatenation. Completely empty headers in a concatenation (as
2018 before) are ignored.
2020 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2021 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2023 PH/29 [Removed. This was a change that I later backed out, and forgot to
2024 correct the ChangeLog entry (that I had efficiently created) before
2025 committing the later change.]
2027 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2028 address errors (4xx response to RCPT) over the same connection as other
2029 messages routed to the same hosts. Such deliveries are always "forced",
2030 so retry times are not inspected. This resulted in far too many retries
2031 for the affected addresses. The effect occurred only when there were more
2032 hosts than the hosts_max_try setting in the smtp transport when it had
2033 the 4xx errors. Those hosts that it had tried were not added to the list
2034 of hosts for which the message was waiting, so if all were tried, there
2035 was no problem. Two fixes have been applied:
2037 (i) If there are any address or message errors in an SMTP delivery, none
2038 of the hosts (tried or untried) are now added to the list of hosts
2039 for which the message is waiting, so the message should not be a
2040 candidate for sending over the same connection that was used for a
2041 successful delivery of some other message. This seems entirely
2042 reasonable: after all the message is NOT "waiting for some host".
2043 This is so "obvious" that I'm not sure why it wasn't done
2044 previously. Hope I haven't missed anything, but it can't do any
2045 harm, as the worst effect is to miss an optimization.
2047 (ii) If, despite (i), such a delivery is accidentally attempted, the
2048 routing retry time is respected, so at least it doesn't keep
2049 hammering the server.
2051 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2052 in ${readsocket because some servers need this prod.
2054 PH/32 Added some extra debug output when updating a wait-xxx database.
2056 PH/33 The hint "could be header name not terminated by colon", which has been
2057 given for certain expansion errors for a long time, was not being given
2058 for the ${if def:h_colon_omitted{... case.
2060 PH/34 The spec says: "With one important exception, whenever a domain list is
2061 being scanned, $domain contains the subject domain." There was at least
2062 one case where this was not true.
2064 PH/35 The error "getsockname() failed: connection reset by peer" was being
2065 written to the panic log as well as the main log, but it isn't really
2066 panic-worthy as it just means the connection died rather early on. I have
2067 removed the panic log writing for the ECONNRESET error when getsockname()
2070 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2071 runs only) independently of the message's sender address. This meant
2072 that, if the 4xx error was in fact related to the sender, a different
2073 message to the same recipient with a different sender could confuse
2074 things. In particualar, this can happen when sending to a greylisting
2075 server, but other circumstances could also provoke similar problems.
2076 I have changed the default so that the retry time for these errors is now
2077 based a combination of the sender and recipient addresses. This change
2078 can be overridden by setting address_retry_include_sender=false in the
2081 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2082 remote server are returned as part of bounce messages. This was not
2083 happening for LMTP over a pipe (the lmtp transport), but now it is the
2084 same for both kinds of LMTP.
2086 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2087 in header lines that were in fact CNAMEs. This is no longer the case.
2089 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2090 and queue runs started by the daemon processed all messages. This has
2091 been fixed so that -R and -S can now usefully be given with -q<time>.
2093 PH/40 Import PCRE release 6.7 (fixes some bugs).
2095 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2097 PH/42 Give an error if -q is specified more than once.
2099 PH/43 Renamed the variables $interface_address and $interface_port as
2100 $received_ip_address and $received_port, to make it clear that these
2101 values apply to message reception, and not to the outgoing interface when
2102 a message is delivered. (The old names remain recognized, of course.)
2104 PH/44 There was no timeout on the connect() call when using a Unix domain
2105 socket in the ${readsocket expansion. There now is.
2107 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2108 be meaningful with "accept".
2110 SC/01 Eximstats V1.43
2111 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2113 SC/02 Eximstats V1.44
2114 Use a glob alias rather than an array ref in the generated
2115 parser. This improves both readability and performance.
2117 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2118 Collect SpamAssassin and rejection statistics.
2119 Don't display local sender or destination tables unless
2120 there is data to show.
2121 Added average volumes into the top table text output.
2123 SC/04 Eximstats V1.46
2124 Collect data on the number of addresses (recipients)
2125 as well as the number of messages.
2127 SC/05 Eximstats V1.47
2128 Added 'Message too big' to the list of mail rejection
2129 reasons (thanks to Marco Gaiarin).
2131 SC/06 Eximstats V1.48
2132 Mainlog lines which have GMT offsets and are too short to
2133 have a flag are now skipped.
2135 SC/07 Eximstats V1.49 (Alain Williams)
2136 Added the -emptyok flag.
2138 SC/08 Eximstats V1.50
2139 Fixes for obtaining the IP address from reject messages.
2141 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2142 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2143 whitesspace changes from 4.64-PH/27
2145 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2148 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2149 are found, allow negative numbers in numeric criteria)
2151 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2153 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2154 to match changes made in 4.64-PH/43
2156 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2158 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2159 "domain" is actually an IP address, and force a failure. This locks out
2160 those revolvers/nameservers that support "A-for-A" lookups, in
2161 contravention of the specifications.
2163 PH/48 When a host name was looked up from an IP address, and the subsequent
2164 forward lookup of the name timed out, the host name was left in
2165 $sender_host_name, contrary to the specification.
2167 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2168 restricted to single-key lookups, Exim was not diagnosing an error if
2169 * or *@ was used with a query-style lookup.
2171 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2173 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2174 long ago, but noone interested enough thought of it. Let's just say that
2175 the "1.1" means that there are some new functions that weren't there at
2176 some point in the past.
2178 PH/51 Error processing for expansion failure of helo_data from an smtp
2179 transport during callout processing was broken.
2181 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2182 tested/used via the -bh/-bhc/-bs options.
2184 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2185 bug, fixed in subsequent PCRE releases).
2187 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2188 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2190 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2196 SC/01 Use a glob alias rather than an array ref in eximstats generated
2197 parser. This improves both readability and performance.
2199 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2200 Don't display local sender or destination tables in eximstats unless
2201 there is data to show.
2202 Added average volumes into the eximstats top table text output.
2204 SC/03 Collect data on the number of addresses (recipients) as well
2205 as the number of messages in eximstats.
2207 TF/01 Correct an error in the documentation for the redirect router. Exim
2208 does (usually) call initgroups() when daemonizing.
2210 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2211 with consistent privilege compared to when running as a daemon.
2213 TF/03 Note in the spec that $authenticated_id is not set for local
2214 submissions from trusted users.
2216 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2217 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2219 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2220 by adding some example configuration directives to the default
2221 configuration file. A little bit of work is required to uncomment the
2222 directives and define how usernames and passwords are checked, but
2223 there is now a framework to start from.
2225 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2226 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2227 without this. I don't know how relevant this is to other LDAP libraries.
2229 PH/02 Add the verb name to the "unknown ACL verb" error.
2231 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2233 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2235 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2236 directory not expanded when it should be if an expanded home directory
2237 was set for the address (which is overridden by the transport).
2239 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2242 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2243 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2244 because it is too late at that time, and has no effect.
2246 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2247 security issue with \' (bugzilla #107). I could not use the
2248 PQescapeStringConn() function, because it needs a PGconn value as one of
2251 PH/08 When testing addresses using -bt, indicate those final addresses that
2252 are duplicates that would not cause an additional delivery. At least one
2253 person was confused, thinking that -bt output corresponded to deliveries.
2254 (Suppressing duplicates isn't a good idea as you lose the information
2255 about possibly different redirections that led to the duplicates.)
2257 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2258 systems where poll() doesn't work, in particular OS X.
2260 PH/10 Added more information to debugging output for retry time not reached.
2262 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2263 operations in malware.c.
2265 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2268 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2269 syslog_duplication set false, log lines that would normally be written
2270 both the the main log and to the reject log were not written to syslog at
2273 PH/14 In the default configuration, change the use of "message" in ACL warn
2274 statements to "add_header".
2276 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2277 not followed by a command (e.g. "seen endif").
2279 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2280 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2283 PH/17 Added extra conditions to the default value of delay_warning_condition
2287 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2288 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2289 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2292 The Auto-Submitted: and various List- headers are standardised, whereas I
2293 don't think Precedence: ever was.
2295 PH/18 Refactored debugging code in route_finduser() to show more information,
2296 in particular, the error code if getpwnam() issues one.
2298 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2299 This is apparently needed in addition to the PH/07 change above to avoid
2300 any possible encoding problems.
2302 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2303 but not after initializing Perl.
2305 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2306 output them only if debugging. By default they are written stderr,
2307 apparently, which is not desirable.
2309 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2312 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2315 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2317 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2318 authenticated or an ident call has been made. Suppress the default
2319 values for $authenticated_id and $authenticated_sender (but permit -oMai
2320 and -oMas) when testing with -bh.
2322 PH/24 Re-jigged the order of the tests in the default configuration so that the
2323 tests for valid domains and recipients precede the DNS black list and CSA
2324 tests, on the grounds that those ones are more expensive.
2326 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2327 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2328 This bug exists in every version of Exim that I still have, right back to
2331 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2332 However, an attempt to turn on case-sensitivity in a regex key by
2333 including (?-i) didn't work because the subject string was already
2334 lowercased, and the effects were non-intuitive. It turns out that a
2335 one-line patch can be used to allow (?-i) to work as expected.
2341 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2342 other effects) broke the use of negated acl sub-conditions.
2344 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2347 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2348 "Deny" causes Exim to reject the incoming connection with a 554 error.
2349 Unfortunately, if there is a major crisis, such as a disk failure,
2350 tcp-wrappers gives "deny", whereas what one would like would be some
2351 kind of temporary error. A kludge has been added to help with this.
2352 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2353 554 error is used if errno is still zero or contains ENOENT (which occurs
2354 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2357 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2359 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2360 errors. Otherwise a message that provokes a temporary error (when other
2361 messages do not) can cause a whole host to time out.
2363 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2364 addresses were routed directly to files or pipes from a redirect router.
2365 File deliveries just didn't batch; pipe deliveries might have suffered
2368 PH/06 A failure to get a lock for a hints database would erroneously always say
2369 "Failed to get write lock", even when it was really a read lock.
2371 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2372 of 0600. This has been changed to use the value of the lockfile_mode
2373 option (which defaults to 0600).
2375 PH/08 Applied small patch from the Sieve maintainer.
2377 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2378 folder from quota calculations, a direct delivery into this folder messed
2379 up the contents of the maildirsize file. This was because the regex was
2380 used only to exclude .Trash (or whatever) when the size of the mailbox
2381 was calculated. There was no check that a delivery was happening into an
2382 excluded directory. This bug has been fixed by ignoring all quota
2383 processing for deliveries into excluded directories.
2385 PH/10 Added the maildirfolder_create_regex option to appendfile.
2391 PH/01 The code for finding all the local interface addresses on a FreeBSD
2392 system running IPv6 was broken. This may well have applied to all BSD
2393 systems, as well as to others that have similar system calls. The broken
2394 code found IPv4 interfaces correctly, but gave incorrect values for the
2395 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2396 that it would not match correctly against @[] and not recognize the IPv6
2399 PH/02 The ipliteral router was not recognizing addresses of the form user@
2400 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2402 PH/03 Added disable_ipv6.
2404 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2405 decoded form, because it is most often used to construct To: headers
2406 lines in autoreplies, and the decoded form may well be syntactically
2407 invalid. However, $reply_address has leading white space removed, and all
2408 newlines turned into spaces so that the autoreply transport does not
2411 PH/05 If group was specified without a user on a router, and no group or user
2412 was specified on a transport, the group from the router was ignored.
2414 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2415 for visible compile-time settings that can be used to change these
2416 numbers, for those that want even more. Backwards compatibility with old
2417 spool files has been maintained. However, going back to a previous Exim
2418 release will lost any variables that are in spool files.
2420 PH/07 Two small changes when running in the test harness: increase delay when
2421 passing a TCP/IP connection to a new process, in case the original
2422 process has to generate a bounce, and remove special handling of
2423 127.0.0.2 (sic), which is no longer necessary.
2425 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2426 be the same on different OS.
2428 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2431 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2432 whether --show-vars was specified or not
2434 JJ/02 exipick: Added support for new ACL variable spool format introduced
2437 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2438 syntactically invalid From: or Reply-to: line, and a filter used this to
2439 generate an autoreply, and therefore failed to obtain an address for the
2440 autoreply, Exim could try to deliver to a non-existent relative file
2441 name, causing unrelated and misleading errors. What now happens is that
2442 it logs this as a hard delivery error, but does not attempt to create a
2445 PH/11 The exinext utility has a -C option for testing purposes, but although
2446 the given file was scanned by exinext itself; it wasn't being passed on
2447 when Exim was called.
2449 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2450 an end-of-file indication when reading a command response.
2452 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2453 compiled. In many other places in Exim, IPv6 addresses are always
2454 recognized, so I have changed this. It also means that IPv4 domain
2455 literals of the form [IPV4:n.n.n.n] are now always recognized.
2457 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2458 used if the router is not running as root, for example, when verifying at
2459 ACL time, or when using -bh. The debugging output from this situation was
2460 non-existent - all you got was a failure to exec. I have made two
2463 (a) Failures to set uid/gid, the current directory, or a process leader
2464 in a subprocess such as that created by queryprogram now generate
2465 suitable debugging ouput when -d is set.
2467 (b) The queryprogram router detects when it is not running as root,
2468 outputs suitable debugging information if -d is set, and then runs
2469 the subprocess without attempting to change uid/gid.
2471 PH/15 Minor change to Makefile for building test_host (undocumented testing
2474 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2475 additional section of a DNS packet that returns MX or SRV records.
2476 Instead, it always explicitly searches for A/AAAA records. This avoids
2477 major problems that occur when a DNS server includes only records of one
2478 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2479 fixed another bug: if SRV records were looked up and the corresponding
2480 address records were *not* found in the additional section, the port
2481 values from the SRV records were lost.
2483 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2484 using the correct key (the original address) when searching the retry
2485 rules in order to find which one to use for generating the retry hint.
2487 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2488 adding the default one. Similarly, if it contains a Reply-To: header, the
2489 errors_reply_to option, if set, is not used.
2491 PH/19 When calculating a retry time, Exim used to measure the "time since
2492 failure" by looking at the "first failed" field in the retry record. Now
2493 it does not use this if it is later than than the arrival time of the
2494 message. Instead it uses the arrival time. This makes for better
2495 behaviour in cases where some deliveries succeed, thus re-setting the
2496 "first failed" field. An example is a quota failure for a huge message
2497 when small messages continue to be delivered. Without this change, the
2498 "time since failure" will always be short, possible causing more frequent
2499 delivery attempts for the huge message than are intended.
2500 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2502 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2503 $1, $2, $3) because the numerical variables can be reset during some
2504 expansion items (e.g. "match"), thereby losing the authentication data.
2506 PH/21 Make -bV show the size of off_t variables so that the test suite can
2507 decide whether to run tests for quotas > 2G.
2509 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2510 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2511 filecount value is greater than 2G or if a quota value is greater than 2G
2512 on a system where the size of off_t is not greater than 4, a panic error
2515 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2516 never match. The debug and -bh output now contains an explicit error
2517 message indicating a malformed IPv4 address or mask.
2519 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2520 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2521 PH/23 above applies.
2523 PH/25 Do not write to syslog when running in the test harness. The only
2524 occasion when this arises is a failure to open the main or panic logs
2525 (for which there is an explicit test).
2527 PH/26 Added the /no_tell option to "control=freeze".
2529 PH/27 If a host name lookup failed very early in a connection, for example, if
2530 the IP address matched host_lookup and the reverse lookup yielded a name
2531 that did not have a forward lookup, an error message of the form "no IP
2532 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2533 could be logged. Now it outputs the IP address instead of "NULL".
2535 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2536 allows the sender and the authenticated sender to be set when
2537 submitting a message from within Exim. Since child_open_exim() is
2538 documented for local_scan(), the new function should be too.
2540 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2541 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2542 results in an empty string is now treated as unset.
2544 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2546 PH/31 Added sender_verify_fail logging option.
2548 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2549 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2550 tidied the source and removed it altogether.
2552 PH/33 When a queue run was abandoned because the load average was too high, a
2553 log line was always written; now it is written only if the queue_run log
2554 selector is set. In addition, the log line for abandonment now contains
2555 information about the queue run such as the pid. This is always present
2556 in "start" and "stop" lines but was omitted from the "abandon" line.
2558 PH/34 Omit spaces between a header name and the colon in the error message that
2559 is given when verify = headers_syntax fails (if there are lots of them,
2560 the message gets confusing).
2562 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2563 names, as there are now some PTR records that contain slashes. This check
2564 is only to protect against broken name servers that fall over on strange
2565 characters, so the fact that it applies to all lookups doesn't matter.
2567 PH/36 Now that the new test suite is complete, we can remove some of the
2568 special code in Exim that was needed for the old test suite. For example,
2569 sorting DNS records because real resolvers return them in an arbitrary
2570 order. The new test suite's fake resolver always returns records in the
2573 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2574 bounces) except when queue_only is set, to avoid logging races between
2575 the different processes.
2577 PH/38 Panic-die if .include specifies a non-absolute path.
2579 PH/39 A tweak to the "H" retry rule from its user.
2581 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2582 a label. They prevented compilation on older perls.
2584 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2585 a warning to be raised on newish perls.
2587 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2588 on queue. Changes to match documented behaviour of showing count of
2589 messages matching specified criteria.
2591 PH/40 Changed the default ident timeout from 30s to 5s.
2593 PH/41 Added support for the use of login_cap features, on those BSD systems
2594 that have them, for controlling the resources used by pipe deliveries.
2596 PH/42 The content-scanning code uses fopen() to create files in which to put
2597 message data. Previously it was not paying any attention to the mode of
2598 the files. Exim runs with umask(0) because the rest of the code creates
2599 files with open(), and sets the required mode explicitly. Thus, these
2600 files were ending up world-writeable. This was not a big issue, because,
2601 being within the spool directory, they were not world-accessible. I have
2602 created a function called modefopen, which takes an additional mode
2603 argument. It sets umask(777), creates the file, chmods it to the required
2604 mode, then resets the umask. All the relevant calls to fopen() in the
2605 content scanning code have been changed to use this function.
2607 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2608 to 24 hours. This avoids potential overflow problems when processing G
2609 and H retry rules. I suspect nobody ever tinkers with this value.
2611 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2613 PH/45 When the plaintext authenticator is running as a client, the server's
2614 challenges are checked to ensure they are valid base64 strings. By
2615 default, the authentication attempt is cancelled if an invalid string is
2616 received. Setting client_ignore_invalid_base64 true ignores these errors.
2617 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2618 they are received. Thus, the responses can be made to depend on the
2619 challenges. If an invalid string is ignored, an empty string is placed in
2622 PH/46 Messages that are created by the autoreply transport now contains a
2623 References: header, in accordance with RFCs 2822 and 3834.
2625 PH/47 Added authenticated_sender_force to the smtp transport.
2627 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2629 PH/49 Installed latest patch from the Sieve maintainer.
2631 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2632 was also set, the appendfile transport was unnecessarily scanning a
2633 directory of message files (e.g. for maildir delivery) to find the count
2634 of files (along with the size), even though it did not need this
2635 information. It now does the scan only if it needs to find either the
2636 size of the count of files.
2638 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2640 PH/52 Two bugs concerned with error handling when the smtp transport is
2643 (i) Exim was not creating retry information for temporary errors given
2644 for individual recipients after the DATA command when the smtp transport
2645 was used in LMTP mode. This meant that they could be retried too
2646 frequently, and not timed out correctly.
2648 (ii) Exim was setting the flag that allows error details to be returned
2649 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2650 recipients that were returned after the DATA command.
2652 PH/53 This is related to PH/52, but is more general: for any failing address,
2653 when detailed error information was permitted to be returned to the
2654 sender, but the error was temporary, then after the final timeout, only
2655 "retry timeout exceeded" was returned. Now it returns the full error as
2656 well as "retry timeout exceeded".
2658 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2659 do this, and (what is worse) MTAs that accept it.
2661 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2662 will now be deprecated.
2664 PH/56 New os.c-cygwin from the Cygwin maintainer.
2666 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2667 formats (previously only available in exim formats via -bpr, -bpru,
2668 and -bpra. Now also available in native and exiqgrep formats)
2670 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2671 with very large, slow to parse queues
2673 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2675 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2677 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2678 responses to authentication challenges, though it was showing the
2679 challenges; (ii) I've removed the CR characters from the debug output for
2682 PH/58 Allow for the insertion of a newline as well as a space when a string
2683 is turned into more than one encoded-word during RFC 2047 encoding. The
2684 Sieve code now uses this.
2686 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2687 data_4xx, lost_connection, tls_required.
2689 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2690 message was being sent as an SMTP response.
2692 PH/61 Add -l and -k options to exicyclog.
2694 PH/62 When verifying, if an address was redirected to one new address, so that
2695 verification continued, and the new address failed or deferred after
2696 having set something in $address_data, the value of $address_data was not
2697 passed back to the ACL. This was different to the case when no
2698 redirection occurred. The value is now passed back in both cases.
2700 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2701 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2702 use login_cap.h, so on its own it isn't the distinguishing feature. The
2703 new name refers directly to the setclassresources() function.
2705 PH/65 Added configuration files for NetBSD3.
2707 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2709 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2710 is preferred over IPv4.
2712 PH/68 The bounce_return_message and bounce_return_body options were not being
2713 honoured for bounces generated during the reception of non-SMTP messages.
2714 In particular, this applied to messages rejected by the ACL. This bug has
2715 been fixed. However, if bounce_return_message is true and bounce_return_
2716 body is false, the headers that are returned for a non-SMTP message
2717 include only those that have been read before the error was detected.
2718 (In the case of an ACL rejection, they have all been read.)
2720 PH/69 The HTML version of the specification is now built in a directory called
2721 spec_html instead of spec.html, because the latter looks like a path with
2722 a MIME-type, and this confuses some software.
2724 PH/70 Catch two compiler warnings in sieve.c.
2726 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2727 function verify_get_ident() calls ip_connect() to connect a socket, but
2728 if the "connect()" function timed out, ip_connect() used to close the
2729 socket. However, verify_get_ident() also closes the socket later, and in
2730 between Exim writes to the log, which may get opened at this point. When
2731 the socket was closed in ip_connect(), the log could get the same file
2732 descriptor number as the socket. This naturally causes chaos. The fix is
2733 not to close the socket in ip_connect(); the socket should be closed by
2734 the function that creates it. There was only one place in the code where
2735 this was missing, in the iplookup router, which I don't think anybody now
2736 uses, but I've fixed it anyway.
2738 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2739 well as to direct DNS lookups. Otherwise the handling of names in host
2740 lists is inconsistent and therefore confusing.
2746 PH/01 Two changes to the default runtime configuration:
2748 (1) Move the checks for relay_from_hosts and authenticated clients from
2749 after to before the (commented out) DNS black list checks.
2751 (2) Add control=submission to the relay_from_hosts and authenticated
2752 clients checks, on the grounds that messages accepted by these
2753 statements are most likely to be submissions.
2755 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2757 (1) Generate an error if the third argument for the ${prvs expansion is
2760 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2763 (3) Reset the variables that are obtained from the first argument of
2764 ${prvscheck and used in the second argument before leaving the code,
2765 because their memory is reclaimed, so using them afterwards may do
2768 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2769 one (it's much easier than Tom thought :-).
2771 (5) Because of (4), we can now allow for the use of $prvscheck_result
2772 inside the third argument.
2774 PH/03 For some reason, the default setting of PATH when running a command from
2775 a pipe transport was just "/usr/bin". I have changed it to
2778 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2779 anything to be listed in the output from -bV.
2781 PH/05 When a filter generated an autoreply, the entire To: header line was
2782 quoted in the delivery log line, like this:
2784 => >A.N.Other <ano@some.domain> <original@ddress> ...
2786 This has been changed so that it extracts the operative address. There
2787 may be more than one such address. If so, they are comma-separated, like
2790 => >ano@some.domain,ona@other.domain <original@ddress> ...
2792 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2793 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2794 not being looked up in the rDNS to get a host name, Exim was showing the
2795 IP address twice in Received: lines, even though the IP addresses were
2796 identical. For example:
2798 Received: from [1.2.3.4] (helo=[1.2.3.4])
2800 However, if the real host name was known, it was omitting the HELO data
2801 if it matched the actual IP address. This has been tidied up so that it
2802 doesn't show the same IP address twice.
2804 PH/07 When both +timestamp and +memory debugging was on, the value given by
2805 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2806 called by the debug printing, thereby overwriting the timestamp buffer.
2807 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2809 PH/08 When the original message was included in an autoreply transport, it
2810 always said "this is a copy of the message, including all the headers",
2811 even if body_only or headers_only was set. It now gives an appropriate
2814 PH/09 Applied a patch from the Sieve maintainer which:
2816 o fixes some comments
2817 o adds the (disabled) notify extension core
2818 o adds some debug output for the result of if/elsif tests
2819 o points to the current vacation draft in the documentation
2820 and documents the missing references header update
2824 o fixes a bug in processing the envelope test (when testing
2825 multiple envelope elements, the last element determinted the
2828 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2829 Electronic Mail") by including:
2831 Auto-submitted: auto-generated
2833 in the messages that it generates (bounce messages and others, such as
2834 warnings). In the case of bounce messages for non-SMTP mesages, there was
2835 also a typo: it was using "Auto_submitted" (underscore instead of
2836 hyphen). Since every message generated by Exim is necessarily in response
2837 to another message, thes have all been changed to:
2839 Auto-Submitted: auto-replied
2841 in accordance with these statements in the RFC:
2843 The auto-replied keyword:
2845 - SHOULD be used on messages sent in direct response to another
2846 message by an automatic process,
2848 - MUST NOT be used on manually-generated messages,
2850 - MAY be used on Delivery Status Notifications (DSNs) and Message
2851 Disposition Notifications (MDNs),
2853 - MUST NOT be used on messages generated by automatic or periodic
2854 processes, except for messages which are automatic responses to
2857 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2858 to the default Received: header definition.
2860 PH/12 Added log selector acl_warn_skipped (default on).
2862 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2863 variables because (a) they are in the wrong storage pool and (b) even if
2864 they were copied, it wouldn't work properly because of the caching.
2866 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2867 checking when decoding. Apparently there are clients that generate
2868 overlong encoded strings. Why am I not surprised?
2870 PH/15 If the first argument of "${if match_address" was not empty, but did not
2871 contain an "@" character, Exim crashed. Now it writes a panic log message
2872 and treats the condition as false.
2874 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2876 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2877 extension "envelope-auth". The code is finished and in agreement with
2878 other implementations, but there is no documentation so far and in fact,
2879 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2880 not changing the active code.
2882 Print executed "if" and "elsif" statements when debugging is used. This
2883 helps a great deal to understand what a filter does.
2885 Document more things not specified clearly in RFC3028. I had all this
2886 sorted out, when out of a sudden new issues came to my mind. Oops."
2888 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2891 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2892 canonical form (as documented). However, after a host name lookup from
2893 the IP address, check_host() was doing a simple string comparison with
2894 addresses acquired from the DNS when checking that the found name did
2895 have the original IP as one of its addresses. Since any found IPv6
2896 addresses are likely to be in abbreviated form, the comparison could
2897 fail. Luckily, there already exists a function for doing the comparison
2898 by converting both addresses to binary, so now that is used instead of
2899 the text comparison.
2901 PH/20 There was another similar case to PH/19, when a complete host name was
2902 given in a host list; looking up its IP address could give an abbreviated
2903 form, whereas the current host's name might or might not be abbreviated.
2904 The same fix has been applied.
2910 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2911 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2914 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2915 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2917 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2919 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2920 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2921 Also, for "Auto-Submitted", treat anything other than "no" as
2922 non-personal, in accordance with RFC 3834. (Previously it treated
2923 anything starting "auto-" as non-personal.)
2925 TF/01 The control=submission/name=... option had a problem with syntax
2926 errors if the name included a slash character. The /name= option
2927 now slurps the rest of the string, so it can include any characters
2928 but it must come last in the list of options (after /sender_retain
2931 PH/05 Some modifications to the interface to the fake nameserver for the new
2939 TK/01 Added the "success_on_redirect" address verification option. See
2940 NewStuff for rationale and an example.
2942 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2944 PH/02 Patch to exigrep to allow it to work on syslog lines.
2946 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2947 fread() to skip over the body file's header line, because in Cygwin the
2948 header line is locked and is inaccessible.
2950 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2951 co-exist for some time) to make it clear that it is the Exim ID that is
2952 referenced, not the Message-ID: header line.
2954 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2955 string_format() function, because snprintf() does not exist on all
2958 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2959 ${stat: expansion item.
2961 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2962 protocol synchronization error", to keep the pedants happy.
2964 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2965 well as for IRIX systems, when gcc is being used. See the host.c source
2968 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2970 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2973 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2974 transport and to the smtp transport in LMTP mode.
2976 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2978 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2979 run a filter in a subprocess. This could lead to confusion in subsequent
2980 lookups in the parent process. There should also be a search_tidyup() at
2981 the end of the subprocess.
2983 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2984 only if the host matched helo_try_verify_hosts, which caused the
2985 verification to occur when the EHLO/HELO command was issued. The ACL just
2986 tested the remembered result. Now, if a previous verification attempt has
2987 not happened, "verify = helo" does it there and then.
2989 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2991 TK/03 Fix log output including CR from clamd.
2993 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2994 exist provoked a memory error which could cause a segfault.
2996 PH/15 Installed PCRE 6.2
2998 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3000 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3001 of the problem. Specifically, suggested +O2 rather than +O1 for the
3004 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3006 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3007 record, the port was not correctly logged when the outgoing_port log
3008 selector was set (it logged the transort's default port).
3010 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3011 fallback_hosts, and "hosts" in the smtp transport.
3013 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3014 host errors such as "Connection refused".
3016 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3017 authentication with radiusclient 0.4.9:
3019 - Error returned from rc_read_config was caught wrongly
3020 - Username/password not passed on to radius server due to wrong length.
3022 The presumption is that some radiusclient API changes for 4.51/PH/17
3023 were not taken care of correctly. The code is still untested by me (my
3024 Linux distribution still has 0.3.2 of radiusclient), but it was
3025 contributed by a Radius user.
3027 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3028 expanding the "port" option of the smtp transport.
3030 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3031 while reading a MIME header. Thanks to Tom Hughes for a patch.
3033 PH/24 Include config.h inside local_scan.h so that configuration settings are
3036 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3037 that in an ACL for RCPT (for example), you can examine exactly what was
3040 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3041 commands, but it was not correctly comparing the address with the actual
3042 client host address. Thus, it would show the EHLO address in Received:
3043 header lines when this was not necessary.
3045 PH/27 Added the % operator to ${eval:}.
3047 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3048 it should be ignoring failures (because with -C, for example, it has lost
3049 privilege). It wasn't ignoring creation failures other than "already
3052 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3055 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3056 because an input line was too long, either on its own, or by virtue of
3057 too many continuations, the temporary file was not being removed, and the
3058 return code was incorrect.
3060 PH/31 Missing "BOOL" in function definition in filtertest.c.
3062 PH/32 Applied Sieve patches from the maintainer.
3064 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3066 PH/33 Added "verify = not_blind".
3068 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3069 Local/Makefile (with some defaults set). These are used in built scripts
3070 such as exicyclog, but they have never been used in the exim_install
3071 script (though there are many overriding facilities there). I have
3072 arranged that the exim_install script now takes note of these two
3075 PH/35 Installed configuration files for Dragonfly.
3077 PH/36 When a locally submitted message by a trusted user did not contain a
3078 From: header, and the sender address was obtained from -f or from an SMTP
3079 MAIL command, and the trusted user did not use -F to supply a sender
3080 name, $originator_name was incorrectly used when constructing a From:
3081 header. Furthermore, $originator_name was used for submission mode
3082 messages from external hosts without From: headers in a similar way,
3083 which is clearly wrong.
3085 PH/37 Added control=suppress_local_fixups.
3087 PH/38 When log_selector = +received_sender was set, and the addition of the
3088 sender made the log line's construction buffer exactly full, or one byte
3089 less than full, an overflow happened when the terminating "\n" was
3092 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3093 when the result of a list match is failure because a DNS lookup failed.
3095 PH/40 RM_COMMAND is now used in the building process.
3097 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3098 the "build-* directories that it finds.
3100 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3101 address in a domain literal was a prefix of an interface address.
3103 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3104 when verifying a sender address, unless rewrite_headers is false.
3106 PH/44 Wrote a long comment about why errors_to addresses are verified as
3107 recipients, not senders.
3109 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3110 the ratelimit ACL was added.
3112 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3114 PH/46 Added extra information about PostgreSQL errors to the error string.
3116 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3117 avoiding the need to install special zones in a real server. This is
3118 backwards compatible; if it can't find the fake resolver, it drops back.
3119 Thus, both old and new test suites can be run.
3121 TF/02 Added util/ratelimit.pl
3123 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3124 clock is set back in time.
3126 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3127 Candler <B.Candler@pobox.com>.
3129 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3130 OK for addresses that are the result of redirections.
3132 PH/48 A number of further additions for the benefit of the new test suite,
3133 including a fake gethostbyname() that interfaces to the fake DNS resolver
3136 TF/06 The fix for widen_domains has also been applied to qualify_single and
3137 search_parents which are the other dnslookup options that can cause
3140 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3143 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3145 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3146 service" if it encountered an MX record with an empty target hostname.
3147 The message is now "an MX or SRV record indicated no SMTP service".
3149 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3150 if the DNS of the sending site is misconfigured. This is quite a
3151 common situation. This change restores the behaviour of treating a
3152 helo verification defer as a failure.
3154 PH/51 If self=fail was set on a router, the bounce message did not include the
3155 actual error message.
3161 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3163 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3164 command itself ended in error, the underlying message about the transport
3165 filter timeout was being overwritten with the pipe command error. Now the
3166 underlying error message should be appended to the second error message.
3168 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3170 PH/02 Reduce the amount of output that "make" produces by default. Full output
3171 can still be requested.
3173 PH/03 The warning log line about a condition test deferring for a "warn" verb
3174 was being output only once per connection, rather than after each
3175 occurrence (because it was using the same function as for successful
3176 "warn" verbs). This seems wrong, so I have changed it.
3178 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3179 it should not have, which might have caused a crash in the right
3180 circumstances, but probably never did.
3182 PH/04 Installed a modified version of Tony Finch's patch to make submission
3183 mode fix the return path as well as the Sender: header line, and to
3184 add a /name= option so that you can make the user's friendly name appear
3187 TF/03 Added the control = fakedefer ACL modifier.
3189 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3190 Mark Lowes for thorough testing.
3192 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3194 TK/03 Merged latest SRS patch from Miles Wilton.
3196 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3197 with the definition in sysexits.h (which is #included earlier).
3198 Fortunately, Exim does not actually use EX_OK. The code used to try to
3199 preserve the sysexits.h value, by assumimg that macro definitions were
3200 scanned for macro replacements. I have been disabused of this notion,
3201 so now the code just undefines EX_OK before #including unistd.h.
3203 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3204 in the smtp transport. When a block could not be written in a single
3205 write() function, the timeout was being re-applied to each part-write.
3206 This seems wrong - if the receiver was accepting one byte at a time it
3207 would take for ever. The timeout is now adjusted when this happens. It
3208 doesn't have to be particularly precise.
3210 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3211 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3213 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3214 without a domain if the check to <postmaster@domain> fails.
3216 SC/01 Eximstats: added -xls and the ability to specify output files
3217 (patch written by Frank Heydlauf).
3219 SC/02 Eximstats: use FileHandles for outputing results.
3221 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3223 SC/04 Eximstats: fixed display of large numbers with -nvr option
3225 SC/05 Eximstats: fixed merging of reports with empty tables.
3227 SC/06 Eximstats: added the -include_original_destination flag
3229 SC/07 Eximstats: removed tabs and trailing whitespace.
3231 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3233 TK/06 MBOX spool code: Add real "From " MBOX separator line
3234 so the .eml file is really in mbox format (even though
3235 most programs do not really care). Patch from Alex Miller.
3237 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3238 The latter is generated from $received_to and is only set if the
3239 message has one envelope recipient. SA can use these headers,
3240 obviously out-of-the-box. Patch from Alex Miller.
3242 PH/08 The ${def test on a variable was returning false if the variable's
3243 value was "0", contrary to what the specification has always said!
3244 The result should be true unless the variable is empty.
3246 PH/09 The syntax error of a character other than { following "${if
3247 def:variable_name" (after optional whitespace) was not being diagnosed.
3248 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3249 accidental colon was present, for example, could give incorrect results.
3251 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3252 result is used (not including appendfile, where other changes are about
3255 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3256 This involved changing a lot of size variables from int to off_t. It
3257 should work with maildirs and everything.
3259 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3260 spamd dying while we are connected to it.
3262 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3265 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3266 function for BDB 4.3.
3268 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3270 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3271 the sources for PCRE have been re-arranged and more files are now
3274 PH/15 The code I had for printing potentially long long variables in PH/11
3275 above was not the best (it lost precision). The length of off_t variables
3276 is now inspected at build time, and an appropriate printing format (%ld
3277 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3278 to be "long long int" or "long int". This is needed for the internal
3279 formatting function string_vformat().
3281 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3282 the configuration file to be ":syslog", then the script "guesses" where
3283 the logs files are, rather than using the compiled in default. In our
3284 case the guess is not the same as the compiled default, so the script
3285 suddenly stopped working when I started to use syslog. The patch checks
3286 to see if log_file_path is "". If so, it attempts to read it from exim
3287 with no configuration file to get the compiled in version, before it
3288 falls back to the previous guessing code."
3290 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3291 implementing BATV in an Exim configuration. See NewStuff for the gory
3294 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3295 Makefile that are specific to HP-UX.
3297 PH/18 If the "use_postmaster" option was set for a recipient callout together
3298 with the "random" option, the postmaster address was used as the MAIL
3299 FROM address for the random test, but not for the subsequent recipient
3300 test. It is now used for both.
3302 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3303 patch removes a few documentation additions to RFC 3028, because the
3304 latest draft now contains them. It adds the new en;ascii-case comparator
3305 and a new error check for 8bit text in MIME parts. Comparator and
3306 require names are now matched exactly. I enabled the subaddress
3307 extension, but it is not well tested yet (read: it works for me)."
3309 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3310 rework some of the code of TK/09 above to avoid the hardwired use of
3311 "%lld" and "long long". Replaced the call to snprintf() with a call to
3314 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3315 records point to non-existent hosts", "retry timeout exceeded", and
3316 "retry time not reached for any host after a long failure period".
3318 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3319 experimental DomainKeys support:
3321 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3322 (2) On an error such as an illegally used "control", the wrong name for
3323 the control was given.
3325 These problems did NOT occur unless DomainKeys support was compiled.
3327 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3329 PH/24 Added ${if match_ip condition.
3331 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3332 databases so that it will be absolutely obvious if a crash occurs in the
3333 DB library. This is a regular occurrence (often caused by mis-matched
3336 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3337 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3338 picked up on a user's system that detects such things. There doesn't seem
3339 to be a gcc warning option for this - only an attribute that has to be
3340 put on the function's prototype. It seems that in Fedora Core 4 they have
3341 set this on a number of new functions. No doubt there will be more in due
3344 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3345 specify a transport. However, if an address that was verified by such a
3346 router was the subject of a callout, Exim crashed because it tried to
3347 read the rcpt_include_affixes from the non-existent transport. Now it
3348 just assumes that the setting of that option is false. This bug was
3349 introduced by 4.51/PH/31.
3351 PH/28 Changed -d+all to exclude +memory, because that information is very
3352 rarely of interest, but it makes the output a lot bigger. People tend to
3353 do -d+all out of habit.
3355 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3356 code in os-type was giving problems when libc.so lives in lib64, like on
3359 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3360 aren't the modern standard, and it seems that some systems' include files
3361 don't always have them. Exim was already checking for some of the newer
3362 ones like T_AAAA, and defining it itself. I've added checks for all the
3363 record types that Exim uses.
3365 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3366 not automatically generating a new one, as it is supposed to. This
3367 prevented TLS from working. If the file did exist, but contained invalid
3368 data, a new version was generated, as expected. It was only the case of a
3369 non-existent file that was broken.
3371 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3372 with a change in libdomainkeys > 0.64.
3374 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3375 from DNS. If the selector record carries the flag, it now has
3376 precedence over the domain-wide flag.
3378 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3380 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3381 the use of a port name that isn't defined in /etc/services) occurred, the
3382 message was deferred as in a normal delivery, and thus remained on the
3383 spool, instead of being failed because of the mua_wrapper setting. This
3384 is now fixed, and I tidied up some of the mua_wrapper messages at the
3387 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3388 the messages in a hash of arrays rather than using individual hashes.
3389 This is a bit cleaner and results in dramatic memory savings, albeit
3390 at a slight CPU cost.
3392 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3393 as requested by Marc Sherman.
3395 SC/10 Eximstats: added histograms for user specified patterns as requested
3398 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3400 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3401 fopen() in the content-scanning modules that did not already have it.
3407 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3408 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3410 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3412 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3414 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3415 to test Sieve filters that use "vacation".
3417 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3418 that changes the way the GnuTLS parameters are stored in the cache file.
3419 The new format can be generated externally. For backward compatibility,
3420 if the data in the cache doesn't make sense, Exim assumes it has read an
3421 old-format file, and it generates new data and writes a new file. This
3422 means that you can't go back to an older release without removing the
3425 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3426 work if there are any delivery delays because "one_time" forces the
3427 parent to be marked "delivered", so its unseen clone is never tried
3428 again. For this reason, Exim now forbids the simultaneous setting of
3431 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3432 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3433 entry if you want to know the details. The fix, however, neglected to
3434 consider the case when local delivery batching is involved. The test for
3435 "previously delivered" was not happening when checking to see if an
3436 address could be batched with a previous (undelivered) one; under
3437 certain circumstances this could lead to multiple deliveries to the same
3440 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3441 in its include files, and this causes problems building Exim.
3443 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3444 header_syntax) but Exim was just ignoring anything given after a slash.
3445 In particular, this caused confusion with an attempt to use "verify =
3446 reverse_host_lookup/defer_ok". An error is now given when options are
3447 supplied for verify items that do not have them. (Maybe reverse_host_
3448 lookup should have a defer_ok option, but that's a different point.)
3450 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3451 defined by RFC 821) to 2048, because there were problems with some AUTH
3452 commands, and RFC 1869 says the size should be increased for extended
3453 SMTP commands that take arguments.
3455 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3458 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3459 "unknown" error; now it says that the functionality isn't in the binary.
3461 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3462 an address' error message when a string expansion fails (syntax or
3463 whatever). Otherwise the password may appear in the log. Following change
3464 PH/42 below, there is no longer a chance of it appearing in a bounce
3467 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3469 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3470 of its addresses was ever tried. (Bugzilla bug #2.)
3472 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3473 the result incorrectly in the debug output. (It correctly added a newline
3474 to what was transported.)
3476 TF/01 Added $received_time.
3478 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3479 commented out examples of how to interface to a virus scanner and to
3480 SpamAssassin. Also added commented examples of av_scanner and
3481 spamd_address settings.
3483 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3484 and controls are allowed in which ACLs. There were a couple of minor
3485 errors. Some of the entries in the conditions table (which is a table of
3486 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3487 negation of where the condition IS allowed.
3489 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3491 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3492 header file does not have a version number, so I've had to invent a new
3493 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3494 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3495 radiusclient), but it was contributed by a Radius user.
3497 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3498 files or directories, for OpenSSL.
3500 PH/19 When an Exim process that is running as root has to create an Exim log
3501 file, it does so in a subprocess that runs as exim:exim so as to get the
3502 ownership right at creation (otherwise, other Exim processes might see
3503 the file with the wrong ownership). There was no test for failure of this
3504 fork() call, which would lead to the process getting stuck as it waited
3505 for a non-existent subprocess. Forks do occasionally fail when resources
3506 run out. I reviewed all the other calls to fork(); they all seem to check
3509 PH/20 When checking for unexpected SMTP input at connect time (before writing
3510 the banner), Exim was not dealing correctly with a non-positive return
3511 from the read() function. If the client had disconnected by this time,
3512 the result was a log entry for a synchronization error with an empty
3513 string after "input=" when read() returned zero. If read() returned -1
3514 (an event I could not check), uninitialized data bytes were printed.
3515 There were reports of junk text (parts of files, etc) appearing after
3518 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3520 PH/22 Added support for macro redefinition, and (re)definition in between
3521 driver and ACL definitions.
3523 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3524 forgetting to use the resulting value; it was using the unexpanded value.
3526 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3527 hadn't been configured. The fix is from Juergen Kreileder, who
3528 understands it better than I do:
3530 "Here's what I see happening with three configured cyrus_sasl
3531 authenticators configured (plain, login, cram-md5):
3533 On startup auth_cyrus_sasl_init() gets called for each of these.
3534 This means three calls to sasl_listmech() without a specified mech_list.
3535 => SASL tests which mechs of all available mechs actually work
3536 => three warnings about OTP not working
3537 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3539 With the patch, sasl_listmech() also gets called three times. But now
3540 SASL's mech_list option is set to the server_mech specified in the the
3541 authenticator. Or in other words, the answer from sasl_listmech()
3542 gets limited to just the mech you're testing for (which is different
3544 => the return list contains just 'plain' or 'login', 'cram-md5' or
3545 nothing depending on the value of ob->server_mech.
3547 I've just tested the patch: Authentication still works fine,
3548 unavailable mechs specified in the exim configuration are still
3549 caught, and the auth.log warnings about OTP are gone."
3551 PH/25 When debugging is enabled, the contents of the command line are added
3552 to the debugging output, even when log_selector=+arguments is not
3555 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3556 answer is "GNU", and only if the return is "GNU/something" is the answer
3559 PH/27 $acl_verify_message is now set immediately after the failure of a
3560 verification in an ACL, and so is available in subsequent modifiers. In
3561 particular, the message can be preserved by coding like this:
3563 warn !verify = sender
3564 set acl_m0 = $acl_verify_message
3566 Previously, $acl_verify_message was set only while expanding "message"
3567 and "log_message" when a very denied access.
3569 PH/28 Modified OS/os.c-Linux with
3571 -#ifndef OS_LOAD_AVERAGE
3572 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3574 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3575 nomenclature these days.)
3577 PH/29 Installed patch from the Sieve maintainer that adds the options
3578 sieve_useraddress and sieve_subaddress to the redirect router.
3580 PH/30 In these circumstances:
3581 . Two addresses routed to the same list of hosts;
3582 . First host does not offer TLS;
3583 . First host accepts first address;
3584 . First host gives temporary error to second address;
3585 . Second host offers TLS and a TLS session is established;
3586 . Second host accepts second address.
3587 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3588 and peerdn, if requested) that were in fact used only for the second
3591 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3592 attention to any local part prefix or suffix that was matched by the
3593 router that accepted the address. It now behaves in the same way as it
3594 does for delivery: the affixes are removed from the local part unless
3595 rcpt_include_affixes is set on the transport.
3597 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3598 timeout during the DATA phase of an incoming message.
3600 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3601 applied a patch sanctioned by the Sieve maintainer.
3603 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3604 the uid or gid is negative. A case of a negative gid caused this to be
3605 noticed. The fix allows for either to be negative.
3607 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3608 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3611 PH/36 The change PH/12 above was broken. Fixed it.
3613 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3614 the grounds that routing the same address twice would always produce the
3615 same answer. This might have been true once, but it is certainly no
3616 longer true now. Routing a child address may depend on the previous
3617 routing that produced that child. Some complicated redirection strategies
3618 went wrong when messages had multiple recipients, and made Exim's
3619 behaviour dependent on the order in which the addresses were given.
3621 I have moved the duplicate checking until after the routing is complete.
3622 Exim scans the addresses that are assigned to local and remote
3623 transports, and removes any duplicates. This means that more work will be
3624 done, as duplicates will always all be routed, but duplicates are
3625 presumably rare, so I don't expect this is of any significance.
3627 For deliveries to pipes, files, and autoreplies, the duplicate checking
3628 still happens during the routing process, since they are not going to be
3631 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3632 It corrects a timeout issue with spamd. This is Ian's comment: "The
3633 background is that sometimes spamd either never reads data from a
3634 connection it has accepted, or it never writes response data. The exiscan
3635 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3636 blindly assumes that writes won't block so it may never time out."
3638 PH/39 Allow G after quota size as well as K and M.
3640 PH/40 The value set for $authenticated_id in an authenticator may not contain
3641 binary zeroes or newlines because the value is written to log lines and
3642 to spool files. There was no check on this. Now the value is run through
3643 the string_printing() function so that such characters are converted to
3644 printable escape sequences.
3646 PH/41 $message_linecount is a new variable that contains the total number of
3647 lines in the message. Compare $body_linecount, which is the count for the
3650 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3651 bounce and delay warning messages, except in certain special cases, which
3654 (a) An SMTP error message from a remote host;
3655 (b) A message specified in a :fail: redirection;
3656 (c) A message specified in a "fail" command in a system filter;
3657 (d) A message specified in a FAIL return from the queryprogram router;
3658 (e) A message specified by the cannot_route_message router option.
3660 In these cases only, Exim does include the error details in bounce and
3661 warning messages. There are also a few cases where bland messages such
3662 as "unrouteable address" or "local delivery error" are given.
3664 PH/43 $value is now also set for the "else" part of a ${run expansion.
3666 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3667 being worked on, but at least Exim now implements the latest version to
3670 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3671 process to complete was treated as a delivery failure, a timeout while
3672 writing the message to the pipe was logged, but erroneously treated as a
3673 successful delivery. Such timeouts include transport filter timeouts. For
3674 consistency with the overall process timeout, these timeouts are now
3675 treated as errors, giving rise to delivery failures by default. However,
3676 there is now a new Boolean option for the pipe transport called
3677 timeout_defer, which, if set TRUE, converts the failures into defers for
3678 both kinds of timeout. A transport filter timeout is now identified in
3681 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3682 systems where "make" and "gmake" are different, calling "gmake" at top
3683 level broke things. I've arranged for the value of $(MAKE) to be passed
3684 from the Makefile to this script so that it can call the same version of
3688 A note about Exim versions 4.44 and 4.50
3689 ----------------------------------------
3691 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3692 changes of various kinds. As a consequence, a big documentation update was
3693 needed. This delayed the release for rather longer than seemed good, especially
3694 in the light of a couple of (minor) security issues. Therefore, the changes
3695 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3696 release. So 4.44 and 4.50 are in effect two different branches that both start
3699 I have left the 4.50 change log unchanged; it contains all the changes since
3700 4.43. The change log for 4.44 is below; many of its items are identical to
3701 those for 4.50. This seems to be the most sensible way to preserve the
3702 historical information.
3708 1. Minor wording change to the doc/README.SIEVE file.
3710 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3711 computation of the current number of files was incorrect.
3713 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3714 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3717 4. Give more explanation in the error message when the command for a transport
3718 filter fails to execute.
3720 5. There are several places where Exim runs a non-Exim command in a
3721 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3722 was being done only for the command run by the queryprogram router. It is
3723 now done for all such subprocesses. The other cases are: ${run, transport
3724 filters, and the commands run by the lmtp and pipe transports.
3726 6. Added CONFIGURE_GROUP build-time option.
3728 7. Some older OS have a limit of 256 on the maximum number of file
3729 descriptors. Exim was using setrlimit() to set 1000 as a large value
3730 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3731 systems. I've change it so that if it can't get 1000, it tries for 256.
3733 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3734 was an oversight, and furthermore, ever since the addition of extra
3735 controls (e.g. 4.43/32), the checks on when to allow different forms of
3736 "control" were broken. There should now be diagnostics for all cases when a
3737 control that does not make sense is encountered.
3739 9. Added the /retain_sender option to "control=submission".
3741 10. $recipients is now available in the predata ACL (oversight).
3743 11. Tidy the search cache before the fork to do a delivery from a message
3744 received from the command line. Otherwise the child will trigger a lookup
3745 failure and thereby defer the delivery if it tries to use (for example) a
3746 cached ldap connection that the parent has called unbind on.
3748 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3749 of $address_data from the recipient verification was clobbered by the
3750 sender verification.
3752 13. The value of address_data from a sender verification is now available in
3753 $sender_address_data in subsequent conditions in the ACL statement.
3755 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3757 15. Added a new option "connect=<time>" to callout options, to set a different
3760 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3761 was its contents. (It was OK if the option was not defined at all.)
3763 17. A "Completed" log line is now written for messages that are removed from
3764 the spool by the -Mrm option.
3766 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3767 information about exactly what failed.
3769 19. Added -dd to debug only the daemon process.
3771 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3772 handles timeouts, both on the server side and network timeouts. Renamed the
3773 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3775 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3776 It is now set to "smtps".
3778 22. $host_address is now set to the target address during the checking of
3779 ignore_target_hosts.
3781 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3782 being passed; this would have caused $sender_host_name to have been used if
3783 matching the list had actually called for a host name (not very likely,
3784 since this list is usually IP addresses). A host name is now passed as
3787 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3788 code that specifies a non-restarting handler (typically sigaction() in
3789 modern systems) in an attempt to fix a rare and obscure crash bug.
3791 25. Narrowed the window for a race in the daemon that could cause it to ignore
3792 SIGCHLD signals. This is not a major problem, because they are used only to
3793 wake it up if nothing else does.
3795 26. A malformed maildirsize file could cause Exim to calculate negative values
3796 for the mailbox size or file count. Odd effects could occur as a result.
3797 The maildirsize information is now recalculated if the size or filecount
3800 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3801 support for a long time. Removed HAVE_SYS_VFS_H.
3803 28. Installed the latest version of exipick from John Jetmore.
3805 29. In an address list, if the pattern was not a regular expression, an empty
3806 subject address (from a bounce message) matched only if the pattern was an
3807 empty string. Non-empty patterns were not even tested. This was the wrong
3808 because it is perfectly reasonable to use an empty address as part of a
3809 database query. An empty address is now tested by patterns that are
3810 lookups. However, all the other forms of pattern expect the subject to
3811 contain a local part and a domain, and therefore, for them, an empty
3812 address still always fails if the pattern is not itself empty.
3814 30. Exim went into a mad DNS loop when attempting to do a callout where the
3815 host was specified on an smtp transport, and looking it up yielded more
3816 than one IP address.
3818 31. Re-factored the code for checking spool and log partition space into a
3819 function that finds that data and another that does the check. The former
3820 is then used to implement four new variables: $spool_space, $log_space,
3821 $spool_inodes, and $log_inodes.
3823 32. The RFC2047 encoding function was originally intended for short strings
3824 such as real names; it was not keeping to the 75-character limit for
3825 encoded words that the RFC imposes. It now respects the limit, and
3826 generates multiple encoded words if necessary. To be on the safe side, I
3827 have increased the buffer size for the ${rfc2047: expansion operator from
3830 33. It is now permitted to omit both strings after an "if" condition; if the
3831 condition is true, the result is "true". As before, when the second string
3832 is omitted, a false condition yields an empty string. This makes it less
3833 cumbersome to write custom ACL and router conditions.
3835 34. Failure to deliver a bounce message always caused it to be frozen, even if
3836 there was an errors_to setting on the router. The errors_to setting is now
3839 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3840 canonical form (fully expanded) before being placed in
3841 $sender_host_address.
3843 36. The table in the code that translates DNS record types into text (T_A to
3844 "A" for instance) was missing entries for NS and CNAME. It is just possible
3845 that this could have caused confusion if both these types were looked up
3846 for the same domain, because the text type is used as part of Exim's
3847 per-process caching. But the chance of anyone hitting this buglet seems
3850 37. The dnsdb lookup has been extended in a number of ways.
3852 (1) There is a new type, "zns", which walks up the domain tree until it
3853 finds some nameserver records. It should be used with care.
3855 (2) There is a new type, "mxh", which is like "mx" except that it returns
3856 just the host names, not the priorities.
3858 (3) It is now possible to give a list of domains (or IP addresses) to be
3859 looked up. The behaviour when one of the lookups defers can be
3860 controlled by a keyword.
3862 (4) It is now possible to specify the separator character for use when
3863 multiple records are returned.
3865 38. The dnslists ACL condition has been extended: it is now possible to supply
3866 a list of IP addresses and/or domains to be looked up in a particular DNS
3869 39. Added log_selector=+queue_time_overall.
3871 40. When running the queue in the test harness, wait just a tad after forking a
3872 delivery process, to get repeatability of debugging output.
3874 41. Include certificate and key file names in error message when GnuTLS fails
3875 to set them up, because the GnuTLS error message doesn't include the name
3876 of the failing file when there is a problem reading it.
3878 42. Allow both -bf and -bF in the same test run.
3880 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3882 44. The "Exiscan patch" is now merged into the mainline Exim source.
3884 45. Sometimes the final signoff response after QUIT could fail to get
3885 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3886 < 0 before doing a fflush(). This bug looks as though it goes back to the
3887 introduction of TLS in release 3.20, but "sometimes" must have been rare
3888 because the tests only now provoked it.
3890 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3891 (this can affect the format of dates).
3893 47. exim_tidydb, when checking for the continued existence of a message for
3894 which it has found a message-specific retry record, was not finding
3895 messages that were in split spool directories. Consequently, it was
3896 deleting retry records that should have stayed in existence.
3898 48. Steve fixed some bugs in eximstats.
3900 49. The SPA authentication driver was not abandoning authentication and moving
3901 on to the next authenticator when an expansion was forced to fail,
3902 contradicting the general specification for all authenticators. Instead it
3903 was generating a temporary error. It now behaves as specified.
3905 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3906 (the order specifies the preference for clients). The order is now AES256,
3907 AES128, 3DES, ARCFOUR128.
3909 51. Small patch to Sieve code - explicitly set From: when generating an
3912 52. Exim crashed if a remote delivery caused a very long error message to be
3913 recorded - for instance if somebody sent an entire SpamAssassin report back
3914 as a large number of 550 error lines. This bug was coincidentally fixed by
3915 increasing the size of one of Exim's internal buffers (big_buffer) that
3916 happened as part of the Exiscan merge. However, to be on the safe side, I
3917 have made the code more robust (and fixed the comments that describe what
3920 53. Now that there can be additional text after "Completed" in log lines (if
3921 the queue_time_overall log selector is set), a one-byte patch to exigrep
3922 was needed to allow it to recognize "Completed" as not the last thing in
3925 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3926 patch that reportedly fixes this has been added. I am not expert enough to
3927 create a test for it. This is what the patch creator wrote:
3929 "I found a little strange behaviour of ldap code when working with
3930 Windows 2003 AD Domain, where users was placed in more than one
3931 Organization Units. When I tried to give exim partial DN, the exit code
3932 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3933 But simultaneously result of request was absolutely normal ldap result,
3934 so I produce this patch..."
3936 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3937 REFERENCE, so I have modified the code to exclude the patch when that macro
3940 55. Some experimental protocols are using DNS PTR records for new purposes. The
3941 keys for these records are domain names, not reversed IP addresses. The
3942 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3943 leaves it alone. Component reversal etc. now happens only for IP addresses.
3946 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3948 57. Double the size of the debug message buffer (to 2048) so that more of very
3949 long debug lines gets shown.
3951 58. The exicyclog utility now does better if the number of log files to keep
3952 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3954 59. Two changes related to the smtp_active_hostname option:
3956 (1) $smtp_active_hostname is now available as a variable.
3957 (2) The default for smtp_banner uses $smtp_active_hostname instead
3958 of $primary_hostname.
3960 60. The host_aton() function is supposed to be passed a string that is known
3961 to be a valid IP address. However, in the case of IPv6 addresses, it was
3962 not checking this. This is a hostage to fortune. Exim now panics and dies
3963 if the condition is not met. A case was found where this could be provoked
3964 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3965 components; fortuitously, this particular loophole had already been fixed
3966 by change 4.50/55 above.
3968 If there are any other similar loopholes, the new check in host_aton()
3969 itself should stop them being exploited. The report I received stated that
3970 data on the command line could provoke the exploit when Exim was running as
3971 exim, but did not say which command line option was involved. All I could
3972 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3973 running as the user.
3976 61. There was a buffer overflow vulnerability in the SPA authentication code
3977 (which came originally from the Samba project). I have added a test to the
3978 spa_base64_to_bits() function which I hope fixes it.
3981 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3982 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3984 63. The daemon start-up calls getloadavg() while still root for those OS that
3985 need the first call to be done as root, but it missed one case: when
3986 deliver_queue_load_max is set with deliver_drop_privilege. This is
3987 necessary for the benefit of the queue runner, because there is no re-exec
3988 when deliver_drop_privilege is set.
3990 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3991 This has been fixed.
3993 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3994 was in use, was not putting the data itself into the right store pool;
3995 consequently, it could be overwritten for a subsequent message in the same
3996 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3999 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4001 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4002 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4003 the function were treating the return as a boolean value, which happened to
4004 work because 0=false and not-0=true, but is not correct code.
4006 68. The host_aton() function was not handling scoped IPv6 addresses (those
4007 with, for example, "%eth0" on the end) correctly.
4009 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4010 negated items (that is, ~something) in unsigned ints. Some compilers
4011 apparently mutter when there is no cast.
4013 70. If an address verification called from an ACL failed, and did not produce a
4014 user-specific message (i.e. there was only a "system" message), nothing was
4015 put in $acl_verify_message. In this situation, it now puts the system
4018 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4019 session; change 4.31/43 added the unwanted input to the log line - except
4020 that it did not do this in the start of session case. It now does.
4022 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4023 This is wrong and can cause the other end to generate a synchronization
4024 error if it is another Exim or anything else that does the synchronization
4025 check. A QUIT command is no longer sent after a timeout.
4027 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4028 during host lookups.
4030 74. The defer_ok option of callout verification was not working if it was used
4031 when verifying addresses in header lines, that is, for this case:
4033 verify = header_sender/callout=defer_ok
4035 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4036 those file descriptors could be used for SMTP connections. If anything
4037 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4038 could be sent to the SMTP client, causing chaos. The daemon now opens
4039 stdin, stdout, and stderr to /dev/null when it puts itself into the
4042 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4043 log by default. The user can override this with suitable Perl magic.
4045 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4046 the log message when discard triggers, was not working for the DATA ACL or
4047 for the non-SMTP ACL.
4049 78. Error message wording change in sieve.c.
4051 79. If smtp_accept_max_per_host was set, the number of connections could be
4052 restricted to fewer than expected, because the daemon was trying to set up
4053 a new connection before checking whether the processes handling previous
4054 connections had finished. The check for completed processes is now done
4055 earlier. On busy systems, this bug wouldn't be noticed because something
4056 else would have woken the daemon, and it would have reaped the completed
4059 80. If a message was submitted locally by a user whose login name contained one
4060 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4061 It caused a spool format error. I have fixed the spool reading code. A
4062 related problem was that the "from" clause in the Received: line became
4063 illegal because of the space(s). It is now covered by ${quote_local_part.
4065 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4068 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4070 83. Patch from Sieve maintainer to fix unterminated string problem in
4071 "vacation" handling.
4073 84. Some minor changes to the Linux configuration files to help with other
4074 OS variants using glibc.
4076 85. One more patch for Sieve to update vacation handling to latest spec.
4079 ----------------------------------------------------
4080 See the note above about the 4.44 and 4.50 releases.
4081 ----------------------------------------------------
4087 1. Change 4.43/35 introduced a bug that caused file counts to be
4088 incorrectly computed when quota_filecount was set in an appendfile
4091 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4092 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4095 3. Give more explanation in the error message when the command for a transport
4096 filter fails to execute.
4098 4. There are several places where Exim runs a non-Exim command in a
4099 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4100 was being done only for the command run by the queryprogram router. It is
4101 now done for all such subprocesses. The other cases are: ${run, transport
4102 filters, and the commands run by the lmtp and pipe transports.
4104 5. Some older OS have a limit of 256 on the maximum number of file
4105 descriptors. Exim was using setrlimit() to set 1000 as a large value
4106 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4107 systems. I've change it so that if it can't get 1000, it tries for 256.
4109 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4110 was an oversight, and furthermore, ever since the addition of extra
4111 controls (e.g. 4.43/32), the checks on when to allow different forms of
4112 "control" were broken. There should now be diagnostics for all cases when a
4113 control that does not make sense is encountered.
4115 7. $recipients is now available in the predata ACL (oversight).
4117 8. Tidy the search cache before the fork to do a delivery from a message
4118 received from the command line. Otherwise the child will trigger a lookup
4119 failure and thereby defer the delivery if it tries to use (for example) a
4120 cached ldap connection that the parent has called unbind on.
4122 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4123 of $address_data from the recipient verification was clobbered by the
4124 sender verification.
4126 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4127 was its contents. (It was OK if the option was not defined at all.)
4129 11. A "Completed" log line is now written for messages that are removed from
4130 the spool by the -Mrm option.
4132 12. $host_address is now set to the target address during the checking of
4133 ignore_target_hosts.
4135 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4136 being passed; this would have caused $sender_host_name to have been used if
4137 matching the list had actually called for a host name (not very likely,
4138 since this list is usually IP addresses). A host name is now passed as
4141 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4142 code that specifies a non-restarting handler (typically sigaction() in
4143 modern systems) in an attempt to fix a rare and obscure crash bug.
4145 15. Narrowed the window for a race in the daemon that could cause it to ignore
4146 SIGCHLD signals. This is not a major problem, because they are used only to
4147 wake it up if nothing else does.
4149 16. A malformed maildirsize file could cause Exim to calculate negative values
4150 for the mailbox size or file count. Odd effects could occur as a result.
4151 The maildirsize information is now recalculated if the size or filecount
4154 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4155 support for a long time. Removed HAVE_SYS_VFS_H.
4157 18. Updated exipick to current release from John Jetmore.
4159 19. Allow an empty sender to be matched against a lookup in an address list.
4160 Previously the only cases considered were a regular expression, or an
4163 20. Exim went into a mad DNS lookup loop when doing a callout where the
4164 host was specified on the transport, if the DNS lookup yielded more than
4167 21. The RFC2047 encoding function was originally intended for short strings
4168 such as real names; it was not keeping to the 75-character limit for
4169 encoded words that the RFC imposes. It now respects the limit, and
4170 generates multiple encoded words if necessary. To be on the safe side, I
4171 have increased the buffer size for the ${rfc2047: expansion operator from
4174 22. Failure to deliver a bounce message always caused it to be frozen, even if
4175 there was an errors_to setting on the router. The errors_to setting is now
4178 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4179 canonical form (fully expanded) before being placed in
4180 $sender_host_address.
4182 24. Updated eximstats to version 1.33
4184 25. Include certificate and key file names in error message when GnuTLS fails
4185 to set them up, because the GnuTLS error message doesn't include the name
4186 of the failing file when there is a problem reading it.
4188 26. Expand error message when OpenSSL has problems setting up cert/key files.
4191 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4192 (this can affect the format of dates).
4194 28. exim_tidydb, when checking for the continued existence of a message for
4195 which it has found a message-specific retry record, was not finding
4196 messages that were in split spool directories. Consequently, it was
4197 deleting retry records that should have stayed in existence.
4199 29. eximstats updated to version 1.35
4200 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4201 1.35 - bugfix such that pie charts by volume are generated correctly
4203 30. The SPA authentication driver was not abandoning authentication and moving
4204 on to the next authenticator when an expansion was forced to fail,
4205 contradicting the general specification for all authenticators. Instead it
4206 was generating a temporary error. It now behaves as specified.
4208 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4209 (the order specifies the preference for clients). The order is now AES256,
4210 AES128, 3DES, ARCFOUR128.
4212 31. Small patch to Sieve code - explicitly set From: when generating an
4215 32. Exim crashed if a remote delivery caused a very long error message to be
4216 recorded - for instance if somebody sent an entire SpamAssassin report back
4217 as a large number of 550 error lines. This bug was coincidentally fixed by
4218 increasing the size of one of Exim's internal buffers (big_buffer) that
4219 happened as part of the Exiscan merge. However, to be on the safe side, I
4220 have made the code more robust (and fixed the comments that describe what
4223 33. Some experimental protocols are using DNS PTR records for new purposes. The
4224 keys for these records are domain names, not reversed IP addresses. The
4225 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4226 leaves it alone. Component reversal etc. now happens only for IP addresses.
4229 34. The host_aton() function is supposed to be passed a string that is known
4230 to be a valid IP address. However, in the case of IPv6 addresses, it was
4231 not checking this. This is a hostage to fortune. Exim now panics and dies
4232 if the condition is not met. A case was found where this could be provoked
4233 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4234 components; fortuitously, this particular loophole had already been fixed
4235 by change 4.50/55 or 4.44/33 above.
4237 If there are any other similar loopholes, the new check in host_aton()
4238 itself should stop them being exploited. The report I received stated that
4239 data on the command line could provoke the exploit when Exim was running as
4240 exim, but did not say which command line option was involved. All I could
4241 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4242 running as the user.
4245 35. There was a buffer overflow vulnerability in the SPA authentication code
4246 (which came originally from the Samba project). I have added a test to the
4247 spa_base64_to_bits() function which I hope fixes it.
4250 36. The daemon start-up calls getloadavg() while still root for those OS that
4251 need the first call to be done as root, but it missed one case: when
4252 deliver_queue_load_max is set with deliver_drop_privilege. This is
4253 necessary for the benefit of the queue runner, because there is no re-exec
4254 when deliver_drop_privilege is set.
4256 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4257 was in use, was not putting the data itself into the right store pool;
4258 consequently, it could be overwritten for a subsequent message in the same
4259 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4262 38. Sometimes the final signoff response after QUIT could fail to get
4263 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4264 < 0 before doing a fflush(). This bug looks as though it goes back to the
4265 introduction of TLS in release 3.20, but "sometimes" must have been rare
4266 because the tests only now provoked it.
4272 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4273 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4274 Now it returns an integer. A number of calls were still expecting a T/F
4275 return. Fortuitously, in all cases, the tests worked in OK situations,
4276 which is the norm. However, things would have gone wrong on any write
4277 failures on the smtp file descriptor. This function is used when sending
4278 messages over SMTP and also when doing verify callouts.
4280 2. When Exim is called to do synchronous delivery of a locally submitted
4281 message (the -odf or -odi options), it no longer closes stderr before doing
4284 3. Implemented the mua_wrapper option.
4286 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4288 5. Implemented the functions header_remove(), header_testname(),
4289 header_add_at_position(), and receive_remove_recipient(), and exported them
4292 6. If an ACL "warn" statement specified the addition of headers, Exim already
4293 inserted X-ACL-Warn: at the start if there was no header name. However, it
4294 was not making this test for the second and subsequent header lines if
4295 there were newlines in the string. This meant that an invalid header could
4296 be inserted if Exim was badly configured.
4298 7. Allow an ACL "warn" statement to add header lines at the start or after all
4299 the Received: headers, as well as at the end.
4301 8. Added the rcpt_4xx retry error code.
4303 9. Added postmaster_mailfrom=xxx to callout verification option.
4305 10. Added mailfrom=xxxx to the callout verification option, for verify=
4308 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4309 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4311 12. Inserted some casts to stop certain compilers warning when using pointer
4312 differences as field lengths or precisions in printf-type calls (mostly
4313 affecting debugging statements).
4315 13. Added optional readline() support for -be (dynamically loaded).
4317 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4318 same clock tick as a message's arrival, so that its received time was the
4319 same as the "first fail" time on the retry record, and that message
4320 remained on the queue past the ultimate address timeout, every queue runner
4321 would try a delivery (because it was past the ultimate address timeout) but
4322 after another failure, the ultimate address timeout, which should have then
4323 bounced the address, did not kick in. This was a "< instead of <=" error;
4324 in most cases the first failure would have been in the next clock tick
4325 after the received time, and all would be well.
4327 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4328 being recognized when the domain list was tested by the match_domain
4329 condition in an expansion string.
4331 16. Added the ${str2b64: operator.
4333 17. Exim was always calling setrlimit() to set a large limit for the number of
4334 processes, without checking whether the existing limit was already
4335 adequate. (It did check for the limit on file descriptors.) Furthermore,
4336 errors from getrlimit() and setrlimit() were being ignored. Now they are
4337 logged to the main and panic logs, but Exim does carry on, to try to do its
4338 job under whatever limits there are.
4340 18. Imported PCRE 5.0.
4342 19. Trivial typo in log message " temporarily refused connection" (the leading
4345 20. If the log selector return_path_on_delivery was set and an address was
4346 redirected to /dev/null, the delivery process crashed because it assumed
4347 that a return path would always be set for a "successful" delivery. In this
4348 case, the whole delivery is bypassed as an optimization, and therefore no
4351 21. Internal re-arrangement: the function for sending a challenge and reading
4352 a response while authentication was assuming a zero-terminated challenge
4353 string. It's now changed to take a pointer and a length, to allow for
4354 binary data in such strings.
4356 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4358 23. Exim was not respecting finduser_retries when seeking the login of the
4359 uid under which it was called; it was always trying 10 times. (The default
4360 setting of finduser_retries is zero.) Also, it was sleeping after the final
4361 failure, which is pointless.
4363 24. Implemented tls_on_connect_ports.
4365 25. Implemented acl_smtp_predata.
4367 26. If the domain in control=submission is set empty, Exim assumes that the
4368 authenticated id is a complete email address when it generates From: or
4369 Sender: header lines.
4371 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4372 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4373 chown and chgrp in /bin and hostname in /usr/bin.
4375 28. Exim was keeping the "process log" file open after each use, just as it
4376 does for the main log. This opens the possibility of it remaining open for
4377 long periods when the USR1 signal hits a daemon. Occasional processlog
4378 errors were reported, that could have been caused by this. Anyway, it seems
4379 much more sensible not to leave this file open at all, so that is what now
4382 29. The long-running daemon process does not normally write to the log once it
4383 has entered its main loop, and it closes the log before doing so. This is
4384 so that log files can straightforwardly be renamed and moved. However,
4385 there are a couple of unusual error situations where the daemon does write
4386 log entries, and I had neglected to close the log afterwards.
4388 30. The text of an SMTP error response that was received during a remote
4389 delivery was being truncated at 512 bytes. This is too short for some of
4390 the long messages that one sometimes sees. I've increased the limit to
4393 31. It is now possible to make retry rules that apply only when a message has a
4394 specific sender, in particular, an empty sender.
4396 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4397 it possible to be selective about when SMTP synchronization is enforced.
4399 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4401 32. Implemented hosts_connection_nolog.
4403 33. Added an ACL for QUIT.
4405 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4408 35. Added mailbox_size and mailbox_filecount to appendfile.
4410 36. Added control = no_multiline_responses to ACLs.
4412 37. There was a bug in the logic of the code that waits for the clock to tick
4413 in the case where the clock went backwards by a substantial amount such
4414 that the microsecond fraction of "now" was more than the microsecond
4415 fraction of "then" (but the whole seconds number was less).
4417 38. Added support for the libradius Radius client library this is found on
4418 FreeBSD (previously only the radiusclient library was supported).
4424 1. When certain lookups returned multiple values in the form name=value, the
4425 quoting of the values was not always being done properly. Specifically:
4426 (a) If the value started with a double quote, but contained no whitespace,
4428 (b) If the value contained whitespace other than a space character (i.e.
4429 tabs or newlines or carriage returns) it was not quoted.
4430 This fix has been applied to the mysql and pgsql lookups by writing a
4431 separate quoting function and calling it from the lookup code. The fix
4432 should probably also be applied to nisplus, ibase and oracle lookups, but
4433 since I cannot test any of those, I have not disturbed their existing code.
4435 2. A hit in the callout cache for a specific address caused a log line with no
4436 reason for rejecting RCPT. Now it says "Previous (cached) callout
4437 verification failure".
4439 3. There was an off-by-one bug in the queryprogram router. An over-long
4440 return line was truncated at 256 instead of 255 characters, thereby
4441 overflowing its buffer with the terminating zero. As well as fixing this, I
4442 have increased the buffer size to 1024 (and made a note to document this).
4444 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4445 when Exim is waiting for an SMTP response from a remote server, Exim
4446 restarts its select() call on the socket, thereby resetting its timeout.
4447 This is not a problem when such interrupts are rare. Somebody set up a cron
4448 job to run exiwhat every 2 minutes, which is less than the normal select()
4449 timeout (5 or 10 minutes). This meant that the select() timeout never
4450 kicked in because it was always reset. I have fixed this by comparing the
4451 time when an interrupt arrives with the time at the start of the first call
4452 to select(). If more time than the timeout has elapsed, the interrupt is
4453 treated as a timeout.
4455 5. Some internal re-factoring in preparation for the addition of Sieve
4456 extensions (by MH). In particular, the "personal" test is moved to a
4457 separate function, and given an option for scanning Cc: and Bcc: (which is
4458 not set for Exim filters).
4460 6. When Exim created an email address using the login of the caller as the
4461 local part (e.g. when creating a From: or Sender: header line), it was not
4462 quoting the local part when it contained special characters such as @.
4464 7. Installed new OpenBSD configuration files.
4466 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4467 try to make them clearer.
4469 9. Callout options, other than the timeout value, were being ignored when
4470 verifying sender addresses in header lines. For example, when using
4472 verify = header_sender/callout=no_cache
4474 the cache was (incorrectly) being used.
4476 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4477 only the Cygwin environment.
4479 11. When return_path_on_delivery was set as a log selector, if different remote
4480 addresses in the same message used different return paths and parallel
4481 remote delivery occurred, the wrong values would sometimes be logged.
4482 (Whenever a remote delivery process finished, the return path value from
4483 the most recently started remote delivery process was logged.)
4485 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4486 lines when AUTH and/or TLS are in use. This is the "received protocol"
4487 field. Exim used to use "asmtp" for authenticated SMTP, without any
4488 indication (in the protocol name) for TLS use. Now it follows the RFC and
4489 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4490 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4491 names appear in log lines as well as in Received: header lines.
4493 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4494 extensions, and comparison tests, and to fix some bugs.
4496 14. Changes to the "personal" filter test:
4498 (1) The test was buggy in that it was just doing the equivalent of
4499 "contains" tests on header lines. For example, if a user's address was
4500 anne@some.where, the "personal" test would incorrectly be true for
4502 To: susanne@some.where
4504 This test is now done by extracting each address from the header in turn,
4505 and checking the entire address. Other tests that are part of "personal"
4506 are now done using regular expressions (for example, to check local parts
4507 of addresses in From: header lines).
4509 (2) The list of non-personal local parts in From: addresses has been
4510 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4511 taken from the Sieve specification recommendations.
4513 (3) If the message contains any header line starting with "List-" it is
4514 treated as non-personal.
4516 (4) The test for "circular" in the Subject: header line has been removed
4517 because it now seems ill-conceived.
4519 15. Minor typos in src/EDITME comments corrected.
4521 16. Installed latest exipick from John Jetmore.
4523 17. If headers_add on a router specified a text string that was too long for
4524 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4525 of string_sprintf() is now avoided.
4527 18. $message_body_size was not set (it was always zero) when running the DATA
4528 ACL and the local_scan() function.
4530 19. For the "mail" command in an Exim filter, no default was being set for
4531 the once_repeat time, causing a random time value to be used if "once" was
4532 specified. (If the value happened to be <= 0, no repeat happened.) The
4533 default is now 0s, meaning "never repeat". The "vacation" command was OK
4534 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4535 (I found it when inspecting the code).
4537 20. There is now an overall timeout for performing a callout verification. It
4538 defaults to 4 times the callout timeout, which applies to individual SMTP
4539 commands during the callout. The overall timeout applies when there is more
4540 than one host that can be tried. The timeout is checked before trying the
4541 next host. This prevents very long delays if there are a large number of
4542 hosts and all are timing out (e.g. when the network connections are timing
4543 out). The value of the overall timeout can be changed by specifying an
4544 additional sub-option for "callout", called "maxwait". For example:
4546 verify = sender/callout=5s,maxwait=20s
4548 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4549 to the end before writing, but this should make it even safer).
4551 22. Exim was forgetting that it had advertised PIPELINING for the second and
4552 subsequent messages on an SMTP connection. It was also not resetting its
4553 memory on STARTTLS and an internal HELO.
4555 23. When Exim logs an SMTP synchronization error within a session, it now
4556 records whether PIPELINING has been advertised or not.
4558 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4559 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4560 rather than long int.
4562 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4564 26. Added the never_mail option to autoreply.
4570 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4571 crash if the getsockname() call failed; this can happen if a connection is
4572 closed very soon after it is established. The problem was simply in the
4573 order in which certain operations were done, causing Exim to try to write
4574 to the SMTP stream before it had set up the file descriptor. The bug has
4575 been fixed by making things happen in the correct order.
4581 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4582 before the connection was closed, thus losing the rejection response.
4584 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4585 some early Solaris releases, but causes trouble in current releases where
4586 socklen_t is defined.
4588 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4591 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4594 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4595 that releasing the top of it at the end releases what was used for sub-
4596 expansions (unless the block got too big). However, discard this block if
4597 the first thing is a variable or header, so that we can use its block when
4598 it is dynamic (useful for very large $message_headers, for example).
4600 6. Lookups now cache *every* query, not just the most recent. A new, separate
4601 store pool is used for this. It can be recovered when all lookup caches are
4602 flushed. Lookups now release memory at the end of their result strings.
4603 This has involved some general refactoring of the lookup sources.
4605 7. Some code has been added to the store_xxx() functions to reduce the amount
4606 of flapping under certain conditions.
4608 8. log_incoming_interface used to affect only the <= reception log lines. Now
4609 it causes the local interface and port to be added to several more SMTP log
4610 lines, for example "SMTP connection from", and rejection lines.
4612 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4614 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4616 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4617 could be overwritten at the end of the current message (or the start of a
4618 new message if it was set in a HELO ACL). The value is now preserved for
4619 the duration of the SMTP connection.
4621 12. If a transport had a headers_rewrite setting, and a matching header line
4622 contained an unqualified address, that address was qualified, even if it
4623 did not match any rewriting rules. The underlying bug was that the values
4624 of the flags that permit the existence of unqualified sender and recipient
4625 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4626 non-local messages, and by -bnq for local messages) were not being
4627 preserved with the message after it was received.
4629 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4630 "next input=" as part of the text comprising the host identity instead of
4631 the correct text. The code was using the same buffer for two different
4632 strings. However, depending on which order the printing function evaluated
4633 its arguments, the bug did not always show up. Under Linux, for example, my
4634 test suite worked just fine.
4636 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4637 doesn't work with some older versions of Perl. It has been changed to "my",
4638 which in any case is probably the better facility to use.
4640 15. A really picky compiler found some instances of statements for creating
4641 error messages that either had too many or two few arguments for the format
4644 16. The size of the buffer for calls to the DNS resolver has been increased
4645 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4646 for addresses that have a lot of PTR records. This alleviates a problem; it
4647 does not fully solve it.
4649 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4650 buffer now truncates the list and logs the incident, which is the same
4651 action as happens when Exim is looking up a host name and its aliases.
4652 Previously in this situation something unpredictable would happen;
4653 sometimes it was "internal error: store_reset failed".
4655 18. If a server dropped the connection unexpectedly when an Exim client was
4656 using GnuTLS and trying to read a response, the client delivery process
4657 crashed while trying to generate an error log message.
4659 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4660 string, for example:
4662 warn message = H1: something\nH2: something
4664 the text was added as a single header line from Exim's point of view
4665 though it ended up OK in the delivered message. However, searching for the
4666 second and subsequent header lines using $h_h2: did not work. This has been
4667 fixed. Similarly, if a system filter added multiple headers in this way,
4668 the routers could not see them.
4670 20. Expanded the error message when iplsearch is called with an invalid key to
4671 suggest using net-iplsearch in a host list.
4673 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4674 ACLs are no longer actually imposed (and a message to that effect is
4677 22. If a "gecos" field in a passwd entry contained escaped characters, in
4678 particular, if it contained a \" sequence, Exim got it wrong when building
4679 a From: or a Sender: header from that name. A second bug also caused
4680 incorrect handling when an unquoted " was present following a character
4681 that needed quoting.
4683 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4684 was not being matched caselessly.
4686 24. Arranged for all hyphens in the exim.8 source to be escaped with
4689 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4690 properly. Recipient callout cache records were still being keyed to include
4691 the sender, even when use_sender was set false. This led to far more
4692 callouts that were necessary. The sender is no longer included in the key
4693 when use_sender is false.
4695 26. Added "control = submission" modifier to ACLs.
4697 27. Added the ${base62d: operator to decode base 62 numbers.
4699 28. dnsdb lookups can now access SRV records.
4701 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4702 the configuration file.
4704 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4705 (-v) mode. This makes the output for a verbose queue run more intelligible.
4707 31. Added a use_postmaster feature to recipient callouts.
4709 32. Added the $body_zerocount variable, containing the number of binary zero
4710 bytes in the message body.
4712 33. The time of last modification of the "new" subdirectory is now used as the
4713 "mailbox time last read" when there is a quota error for a maildir
4716 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4718 35. Added +ignore_unknown as a special item in host lists.
4720 36. Code for decoding IPv6 addresses in host lists is now included, even if
4721 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4722 address was recognized as an IP address, but was then not correctly decoded
4723 into binary, causing unexpected and incorrect effects when compared with
4730 1. Very minor rewording of debugging text in manualroute to say "list of
4731 hosts" instead of "hostlist".
4733 2. If verify=header_syntax was set, and a header line with an unqualified
4734 address (no domain) and a large number of spaces between the end of the
4735 name and the colon was received, the reception process suffered a buffer
4736 overflow, and (when I tested it) crashed. This was caused by some obsolete
4737 code that should have been removed. The fix is to remove it!
4739 3. When running in the test harness, delay a bit after writing a bounce
4740 message to get a bit more predictability in the log output.
4742 4. Added a call to search_tidyup() just before forking a reception process. In
4743 theory, someone could use a lookup in the expansion of smtp_accept_max_
4744 per_host which, without the tidyup, could leave open a database connection.
4746 5. Added the variables $recipient_data and $sender_data which get set from a
4747 lookup success in an ACL "recipients" or "senders" condition, or a router
4748 "senders" option, similar to $domain_data and $local_part_data.
4750 6. Moved the writing of debug_print from before to after the "senders" test
4753 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4754 problems for message scanning, either using a data ACL, or using
4755 local_scan() because the Received: header was not generated till after they
4756 were called (in order to set the time as the time of reception completion).
4757 I have revised the way this works. The header is now generated after the
4758 body is received, but before the ACL or local_scan() are called. After they
4759 are run, the timestamp in the header is updated.
4765 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4766 before starting a queue runner without re-exec. This happened only when
4767 deliver_drop_privilege was set or when the Exim user was set to root. The
4768 effect of the bug was that timeouts during subsequent deliveries caused
4769 crashes instead of being properly handled. The handler is now left at its
4770 default (and expected) setting.
4772 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4773 message, again when deliver_drop_privilege is set or Exim is run as root.
4774 The bug described in (1) was not present in this case, but the tidying up
4775 of the other signals was missing. I have made the two cases consistent.
4777 3. The ignore_target_hosts setting on a manualroute router was being ignored
4778 for hosts that were looked up using the /MX notation.
4780 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4783 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4784 operated on the sender address. After changing the $sender_address to <>
4785 for the sender address verify, Exim was re-instated it as the original
4786 (before rewriting) address, but remembering that it had rewritten it, so it
4787 wasn't rewriting it again. This bug also had the effect of breaking the
4788 sender address verification caching when the sender address was rewritten.
4790 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4791 This has been changed so that if the ip literal address matches
4792 ignore_target_hosts, the router declines.
4794 7. Added expansion conditions match_domain, match_address, and match_local_
4795 part (NOT match_host).
4797 8. The placeholder for the Received: header didn't have a length field set.
4799 9. Added code to Exim itself and to exim_lock to test for a specific race
4800 condition that could lead to file corruption when using MBX delivery. The
4801 issue is with the lockfile that is created in /tmp. If this file is removed
4802 after a process has opened it but before that process has acquired a lock,
4803 there is the potential for a second process to recreate the file and also
4804 acquire a lock. This could lead to two Exim processes writing to the file
4805 at the same time. The added code performs the same test as UW imapd; it
4806 checks after acquiring the lock that its file descriptor still refers to
4807 the same named file.
4809 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4810 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4813 11. Added the smtp_active_hostname option. If used, this will typically be made
4814 to depend on the incoming interface address. Because $interface_address is
4815 not set up until the daemon has forked a reception process, error responses
4816 that can happen earlier (such as "too many connections") no longer contain
4819 12. If an expansion in a condition on a "warn" statement fails because a lookup
4820 defers, the "warn" statement is abandoned, and the next ACL statement is
4821 processed. Previously this caused the whole ACL to be aborted.
4823 13. Added the iplsearch lookup type.
4825 14. Added ident_timeout as a log selector.
4827 15. Added tls_certificate_verified as a log selector.
4829 16. Added a global option tls_require_ciphers (compare the smtp transport
4830 option of the same name). This controls incoming TLS connections.
4832 17. I finally figured out how to make tls_require_ciphers do a similar thing
4833 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4834 before starting the TLS session.
4836 18. Tabs are now shown as \t in -bP output.
4838 19. If the log selector return_path_on_delivery was set, Exim crashed when
4839 bouncing a message because it had too many Received: header lines.
4841 20. If two routers both had headers_remove settings, and the first one included
4842 a superfluous trailing colon, the final name in the first list and the
4843 first name in the second list were incorrectly joined into one item (with a
4844 colon in the middle).
4850 1. Added -C and -D options to the exinext utility, mainly to make it easier
4851 to include in the automated testing, but these could be helpful when
4852 multiple configurations are in use.
4854 2. The exinext utility was not formatting the output nicely when there was
4855 an alternate port involved in the retry record key, nor when there was a
4856 message id as well (for retries that were specific to a specific message
4857 and a specific host). It was also confused by IPv6 addresses, because of
4858 the additional colons they contain. I have fixed the IPv4 problem, and
4859 patched it up to do a reasonable job for IPv6.
4861 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4862 delivery, the log line now contains "pipelined" if PIPELINING was used.
4864 4. An SMTP transport process used to panic and die if the bind() call to set
4865 an explicit outgoing interface failed. This has been changed; it is now
4866 treated in the same way as a connect() failure.
4868 5. A reference to $sender_host_name in the part of a conditional expansion
4869 that was being skipped was still causing a DNS lookup. This no longer
4872 6. The def: expansion condition was not recognizing references to header lines
4873 that used bh_ and bheader_.
4875 7. Added the _cache feature to named lists.
4877 8. The code for checking quota_filecount in the appendfile transport was
4878 allowing one more file than it should have been.
4880 9. For compatibility with Sendmail, the command line option
4888 and sets the incoming protocol and host name (for trusted callers). The
4889 host name and its colon can be omitted when only the protocol is to be set.
4890 Note the Exim already has two private options, -pd and -ps, that refer to
4891 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4892 "s", but I don't think that's a major issue.
4894 10. A number of refactoring changes to the code, none of which should affect
4897 (a) The number of logging options was getting close to filling up the
4898 32-bit word that was used as a bit map. I have split them into two classes:
4899 those that are passed in the argument to log_write(), and those that are
4900 only ever tested independently outside of that function. These are now in
4901 separate 32-bit words, so there is plenty of room for expansion again.
4902 There is no change in the user interface or the logging behaviour.
4904 (b) When building, for example, log lines, the code previously used a
4905 macro that called string_cat() twice, in order to add two strings. This is
4906 not really sufficiently general. Furthermore, there was one instance where
4907 it was actually wrong because one of the argument was used twice, and in
4908 one call a function was used. (As it happened, calling the function twice
4909 did not affect the overall behaviour.) The macro has been replaced by a
4910 function that can join an arbitrary number of extra strings onto a growing
4913 (c) The code for expansion conditions now uses a table and a binary chop
4914 instead of a serial search (which was left over from when there were very
4915 few conditions). Also, it now recognizes conditions like "pam" even when
4916 the relevant support is not compiled in: a suitably worded error message is
4917 given if an attempt is made to use such a condition.
4919 11. Added ${time_interval:xxxxx}.
4921 12. A bug was causing one of the ddress fields not to be passed back correctly
4922 from remote delivery subprocesses. The field in question was not being
4923 subsequently used, so this caused to problems in practice.
4925 13. Added new log selectors queue_time and deliver_time.
4927 14. Might have fixed a bug in maildirsizefile handling that threw up
4928 "unexpected character" debug warnings, and recalculated the data
4929 unnecessarily. In any case, I expanded the warning message to give more
4932 15. Added the message "Restricted characters in address" to the statements in
4933 the default ACL that block characters like @ and % in local parts.
4935 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4936 Three changes have been made:
4938 (a) There was a serious bug; a negative response to MAIL caused the whole
4939 recipient domain to be cached as invalid, thereby blocking all messages
4940 to all local parts at the same domain, from all senders. This bug has
4941 been fixed. The domain is no longer cached after a negative response to
4942 MAIL if the sender used is not empty.
4944 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4947 (c) A new callout option, "use_sender" has been added for people who want
4948 the modified behaviour.
4954 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4957 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4958 indeed breaks things for older releases.
4960 3. Added additional logging to the case where there is a problem reading data
4961 from a filter that is running in a subprocess using a pipe, in order to
4962 try to track down a specific problem.
4964 4. Testing facility fudge: when running in the test harness and attempting
4965 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4966 getting "No route to host". Convert this to a timeout.
4968 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4971 6. Some OS don't have socklen_t but use size_t instead. This affects the
4972 fifth argument of getsockopt() amongst other things. This is now
4973 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4974 can be set for individual OS. I have set it for SunOS5, OSF1, and
4975 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4976 some earlier ones do not.
4978 7. Change 4.30/15 was not doing the test caselessly.
4980 8. The standard form for an IPv6 address literal was being rejected by address
4981 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4982 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4983 this, as well as the form without the "IPv6" on the front (but only when
4984 address literals are enabled, of course).
4986 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4988 10. Exim crashed if a message with an empty sender address specified by -f
4989 encountered a router with an errors_to setting. This could be provoked only
4990 by a command such as
4994 where an empty string was supplied; "<>" did not hit this bug.
4996 11. Installed PCRE release 4.5.
4998 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4999 remained set. It is now erased.
5001 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5002 times from message ids (which are base 36 rather than the normal 62).
5004 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5005 were being counted as actual protocol errors, and logged if the log
5006 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5007 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5008 and DATA following a set of rejected RCPTs do not count as protocol errors.
5009 In other words, Exim assumes they were pipelined, though this may not
5010 actually be the case. Of course, in all cases the client gets an
5011 appropriate error code.
5013 15. If a lookup fails in an ACL condition, a message about the failure may
5014 be available; it is used if testing the ACL cannot continue, because most
5015 such messages specify what the cause of the deferral is. However, some
5016 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5017 that caused an old message to be retained and used if a later statement
5018 caused a defer, replacing the real cause of the deferral.
5020 16. If an IP address had so many PTR records that the DNS lookup buffer
5021 was not large enough to hold them, Exim could crash while trying to process
5022 the truncated data. It now detects and logs this case.
5024 17. Further to 4.21/58, another change has been made: if (and only if) the
5025 first line of a message (the first header line) ends with CRLF, a bare LF
5026 in a subsequent header line has a space inserted after it, so as not to
5027 terminate the header.
5029 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5030 unnecessarily, used atoi() instead of strtol(), and didn't check the
5031 termination when getting file sizes from file names by regex.
5033 19. Completely re-implemented the support for maildirsize files, in the light
5034 of a number of problems with the previous contributed implementation
5035 (4.30/29). In particular:
5037 . If the quota is zero, the maildirsize file is maintained, but no quota is
5040 . If the maildir directory does not exist, it is created before any attempt
5041 to write a maildirsize file.
5043 . The quota value in the file is just a cache; if the quota is changed in
5044 the transport, the new value overrides.
5046 . A regular expression is available for excluding directories from the
5049 20. The autoreply transport checks the characters in options that define the
5050 message's headers; it allows continued headers, but it was checking with
5051 isspace() after an embedded newline instead of explicitly looking for a
5054 21. If all the "regular" hosts to which an address was routed had passed their
5055 expiry times, and had not reached their retry times, the address was
5056 bounced, even if fallback hosts were defined. Now Exim should go on to try
5059 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5060 equivalent code in the SMTP transport. Some hosts send humungous responses
5061 to HELO/EHLO, more than 1024 it seems.
5063 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5064 gives compiler warnings in some environments. I've now done it "properly",
5067 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5068 (because of problems with the built-in one) was declared to return uschar *
5069 instead of char *, causing compiler failure.
5071 25. Fixed a file descriptor leak when processing alias/forward files.
5073 26. Fixed a minor format string issue in dbfn.c.
5075 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5077 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5078 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5081 29. When a sender address is verified, it is cached, to save repeating the test
5082 when there is more than one recipient in a message. However, when the
5083 verification involves a callout, it is possible for different callout
5084 options to be set for different recipients. It is too complicated to keep
5085 track of this in the cache, so now Exim always runs a verification when a
5086 callout is required, relying on the callout cache for the optimization.
5087 The overhead is duplication of the address routing, but this should not be
5090 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5091 to be verified with callout=postmaster, and the main callout worked but the
5092 postmaster check failed, the verification correctly failed. However, if a
5093 subsequent RCPT command asked for sender verification *without* the
5094 postmaster check, incorrect caching caused this verification also to fail,
5097 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5098 it was not caching the DNS options (qualify_single, search_parents) that
5099 were used when the lookup failed. A subsequent lookup with different
5100 options therefore always gave the same answer, though there were cases
5101 where it should not have. (Example: a "domains = !$mx_any" option on a
5102 dnslookup router: the "domains" option is always processed without any
5103 widening, but the router might have qualify_single set.) Now Exim uses the
5104 cached value only when the same options are set.
5106 32. Added John Jetmore's "exipick" utility to the distribution.
5108 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5109 than a timeout (e.g. a certificate is required, and is not provided), an
5110 Exim server now closes the connection immediately. Previously it waited for
5111 the client to close - but if the client is SSL, it seems that they each
5112 wait for each other, leading to a delay before one of them times out.
5114 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5115 maintained 0.8.x compatibility because I don't think many are using it, and
5116 it is clearly obsolete.
5118 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5121 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5122 client certificate was expired. A simple patch fixes this, though I don't
5123 understand the full logic of why the verify callback is called multiple
5126 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5127 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5128 which causes problems with some clients (such as the Certicom SSL Plus
5129 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5130 disables the coutermeasure allowing Eudora to connect."
5132 38. Exim was not checking that a write() to a log file succeeded. This could
5133 lead to Bad Things if a log got too big, in particular if it hit a file
5134 size limit. Exim now panics and dies if it cannot write to a log file, just
5135 as it does if it cannot open a log file.
5137 39. Modified OS/Makefile-Linux so that it now contains
5139 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5141 The two -D definitions ensure that Exim is compiled with large file
5142 support, which makes it possible to handle log files that are bigger than
5145 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5146 instance) a domain was checked against a named list that involved a lookup,
5147 causing $domain_data to be set, then another domain was checked against the
5148 same list, then the first domain was re-checked, the value of $domain_data
5149 after the final check could be wrong. In particular, if the second check
5150 failed, it could be set empty. This bug probably also applied to
5153 41. The strip_trailing_dot option was not being applied to the address given
5154 with the -f command-line option.
5156 42. The code for reading a message's header from the spool was incrementing
5157 $received_count, but never initializing it. This meant that the value was
5158 incorrect (doubled) while delivering a message in the same process in which
5159 it was received. In the most common configuration of Exim, this never
5160 happens - a fresh exec is done - but it can happen when
5161 deliver_drop_privilege is set.
5163 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5164 it now includes up to 150 characters of the unexpected data in the log
5167 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5168 and building data strings. The size of both of these buffers was 10 000
5169 bytes - far larger than anybody would *ever* want, thought I. Needless to
5170 say, somebody hit the limit. I have increased the maximum line length to
5171 20 000 and the maximum data length of concatenated lines to 100 000. I have
5172 also fixed two bugs, because there was no checking on these buffers. Tsk,
5173 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5174 buffer is too small.
5176 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5177 lsearch lookups. Now it does.
5179 46. When parsing a route_list item in a manualroute router, a fixed-length
5180 buffer was used for the list of hosts. I made this 1024 bytes long,
5181 thinking that nobody would ever have a list of hosts that long. Wrong.
5182 Somebody had a whole pile of complicated expansion conditions, and the
5183 string was silently truncated, leading to an expansion error. It turns out
5184 that it is easier to change to an unlimited length (owing to other changes
5185 that have happened since this code was originally written) than to build
5186 structure for giving a limitation error. The length of the item that
5187 expands into the list of hosts is now unlimited.
5189 47. The lsearch lookup could not handle data where the length of text line was
5190 more than 4095 characters. Such lines were truncated, leading to shortened
5191 data being returned. It should now handle lines of any length.
5193 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5194 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5197 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5198 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5199 no longer happens in comment lines. A list of replacements is now placed
5200 at the head of all of the source files, except those whose only change is
5201 to replace PERL_COMMAND in the very first #! line.
5203 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5204 messages on the queue, with a bottom-up merge sort, using code contributed
5205 by Michael Haardt. This should make operations like -bp somewhat faster on
5206 large queues. It won't affect queue runners, except when queue_run_in_order
5209 51. Installed eximstats 1.31 in the distribution.
5211 52. Added support for SRV lookups to the dnslookup router.
5213 53. If an ACL referred to $message_body or $message_body_end, the value was not
5214 reset for any messages that followed in the same SMTP session.
5216 54. The store-handling optimization for building very long strings was not
5217 differentiating between the different store pools. I don't think this
5218 actually made any difference in practice, but I've tidied it.
5220 55. While running the routers to verify a sender address, $sender_address
5221 was still set to the sender address. This is wrong, because when routing to
5222 send a bounce to the sender, it would be empty. Therefore, I have changed
5223 it so that, while verifying a sender address, $sender_address is set to <>.
5224 (There is no change to what happens when verifying a recipient address.)
5226 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5227 target A or AAAA records (if not already returned) without resetting the
5228 qualify_single or search_parents options of the DNS resolver. These are
5229 inappropriate in this case because the targets of MX and SRV records must
5230 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5231 target that, when qualified, matched something in the local domain. These
5232 two options are now turned off when doing these lookups.
5234 57. It seems that at least some releases of Reiserfs (which does not have the
5235 concept of a fixed number of inodes) returns zero and not -1 for the
5236 number of available inodes. This interacted badly with check_spool_inodes,
5237 which assumed that -1 was the "no such thing" setting. What I have done is
5238 to check that the total number of inodes is greater than zero before doing
5239 the test of how many are available.
5241 58. When a "warn" ACL statement has a log_message modifier, the message is
5242 remembered, and not repeated. This is to avoid a lot of repetition when a
5243 message has many recipients that cause the same warning to be written.
5244 Howewer, Exim was preserving the list of already written lines for an
5245 entire SMTP session, which doesn't seem right. The memory is now reset if a
5246 new message is started.
5248 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5249 debugging output unless log_rewrite was also set.
5251 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5252 of (int)(handle) when we know that handle contains (void *)(-1).
5254 61. The Exim daemon panic-logs an error return when it closes the incoming
5255 connection. However "connection reset by peer" seems to be common, and
5256 isn't really an error worthy of noting specially, so that particular error
5259 62. When Exim is trying to find all the local interfaces, it used to panic and
5260 die if the ioctl to get the interface flags failed. However, it seems that
5261 on at least one OS (Solaris 9) it is possible to have an interface that is
5262 included in the list of interfaces, but for which you get a failure error
5263 for this call. This happens when the interface is not "plumbed" into a
5264 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5265 failure of the "get flags" call assumes that the interface is down.
5267 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5268 makes life easier for people who are doing arithmetic on fields extracted
5269 from dates, where you often get leading zeros that should not be
5270 interpreted as octal.
5272 64. Added qualify_domain to the redirect router, to override the global
5275 65. If a pathologically long header line contained very many addresses (the
5276 report of this problem mentioned 10 000) and each of them was rewritten,
5277 Exim could use up a very large amount of memory. (It kept on making new
5278 copies of the header line as it rewrote, and never released the old ones.)
5279 At the expense of a bit more processing, the header rewriting function has
5280 been changed so that it no longer eats memory in this way.
5282 66. The generation of the Received: header has been moved from the time that a
5283 message starts to be received, to the time that it finishes. The timestamp
5284 in the Received: header should now be very close to that of the <= log
5285 line. There are two side-effects of this change:
5287 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5288 logged header lines no longer include the local Received: line, because
5289 it has not yet been created. The same applies to a copy of the message
5290 that is returned to a non-SMTP sender when a message is rejected.
5292 (b) When a filter file is tested using -bf, no additional Received: header
5293 is added to the test message. After some thought, I decided that this
5296 This change does not affect the value of $received_for. It is still set
5297 after address rewriting, but before local_scan() is called.
5299 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5301 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5302 gave an unhelpful panic error message, and a defer error. I have managed to
5303 change this behaviour so that it now rejects any supplied certificate,
5304 which seems right, as the list of acceptable certificates is empty.
5306 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5307 gave an unhelpful defer error. I have not managed to make this reject any
5308 supplied certificates, but the error message it gives is "no certificate
5309 supplied", which is not helpful.
5311 70. exigrep's output now also includes lines that are not associated with any
5312 message, but which match the given pattern. Implemented by a patch from
5313 Martin Sluka, which also tidied up the Perl a bit.
5315 71. Recipient callout verification, like sender verification, was using <> in
5316 the MAIL FROM command. This isn't really the right thing, since the actual
5317 sender may affect whether the remote host accepts the recipient or not. I
5318 have changed it to use the actual sender in the callout; this means that
5319 the cache record is now keyed on a recipient/sender pair, not just the
5320 recipient address. There doesn't seem to be a real danger of callout loops,
5321 since a callout by the remote host to check the sender would use <>.
5322 [SEE ABOVE: changed after hitting problems.]
5324 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5325 temporary errors. However, in the case of such a code being given after
5326 the end of a data transmission (i.e. after ".") Exim was failing to write
5327 a retry record for the message. (Yes, there was some broken host that was
5328 actually sending 8xx at this point.)
5330 73. An unknown lookup type in a host list could cause Exim to panic-die when
5331 the list was checked. (An example that provoked this was putting <; in the
5332 middle of a list instead of at the start.) If this happened during a DATA
5333 ACL check, a -D file could be left lying around. This kind of configuration
5334 error no longer causes Exim to die; instead it causes a defer errror. The
5335 incident is still logged to the main and panic logs.
5337 74. Buglet left over from Exim 3 conversion. The message "too many messages
5338 in one connection" was written to the rejectlog but not the mainlog, except
5339 when address rewriting (yes!) was being logged.
5341 75. Added write_rejectlog option.
5343 76. When a system filter was run not as root (that is, when system_filter_user
5344 was set), the values of the $n variables were not being returned to the
5345 main process; thus, they were not subsequently available in the $sn
5348 77. Added +return_path_on_delivery log selector.
5350 78. A connection timeout was being treated differently from recipients deferred
5351 when testing hosts_max_try with a message that was older than the host's
5352 retry timeout. (The host should not be counted, thus allowing all hosts to
5353 be tried at least once before bouncing.) This may have been the cause of an
5354 occasionally reported bug whereby a message would remain on the queue
5355 longer than the retry timeout, but would be bounced if a delivery was
5356 forced. I say "may" because I never totally pinned down the problem;
5357 setting up timeout/retry tests is difficult. See also the next item.
5359 79. The ultimate address timeout was not being applied to errors that involved
5360 a combination of host plus message (for example, a timeout on a MAIL
5361 command). When an address resolved to a number of possible hosts, and they
5362 were not all tried for each delivery (e.g. because of hosts_max_try), a
5363 message could remain on the queue longer than the retry timeout.
5365 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5368 81. Fixed an obscure SMTP outgoing bug which required at least the following
5369 conditions: (a) there was another message waiting for the same server;
5370 (b) the server returned 5xx to all RCPT commands in the first message so
5371 that the message was not completed; (c) the server dropped the connection
5372 or gave a negative response to the RSET that Exim sends to abort the
5373 transaction. The observed case was a dropped connection after DATA that had
5374 been sent in pipelining mode. That is, the server had advertised PIPELINING
5375 but was not implementing it correctly. The effect of the bug was incorrect
5376 behaviour, such as trying another host, and this could lead to a crash.
5382 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5383 and daemon.c were passed as pointers to ints; they should have been
5384 pointers to socklen_t variables (which are typically unsigned ints).
5386 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5389 3. Fixed a really odd bug that affected only the testing scheme; patching a
5390 certain fixed string in the binary changed the value of another string that
5391 happened to be identical to the end of the original first string.
5393 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5394 name", it returns that address as the IP address. On some operating
5395 systems (e.g. Solaris), it also passes back the IP address string as the
5396 "host name". However, on others (e.g. Linux), it passes back an empty
5397 string. Exim wasn't checking for this, and was changing the host name to an
5398 empty string, assuming it had been canonicized.
5400 5. Although rare, it is permitted to have more than one PTR record for a given
5401 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5402 all the names associated with an address, because they do in Solaris.
5403 However, it seems that they do not in Linux for data that comes from the
5404 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5405 I found this out when I moved to a new Linux workstation and tried to run
5406 the Exim test suite.
5408 To get round this problem I have changed the code so that it now does its
5409 own call to the DNS to look up PTR records when searching for a host name.
5410 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5411 addresses that are only in /etc/hosts are still found.
5413 This behaviour is, however, controlled by an option called host_lookup_
5414 order, which defaults to "bydns:byaddr". If people want to use the other
5415 order, or indeed, just use one or the other means of lookup, they can
5416 specify it in this variable.
5418 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5419 some operating systems, this comes back from gethostbyaddr() as an empty
5420 string, and this is what Exim used to test for. However, it seems that in
5421 other systems, "." is yielded. Exim now tests for this case too.
5423 7. The values of check_spool_space and check_log_space are now held internally
5424 as a number of kilobytes instead of an absolute number of bytes. If a
5425 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5426 kilobyte. This means that much larger values can be stored.
5428 8. Exim monitor: an attempt to get the action menu when not actually pointing
5429 at a message produces an empty menu entitled "No message selected". This
5430 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5431 no entries in it ("Shell widget menu has zero width and/or height"). So I
5432 have added a single, blank menu entry in this case.
5434 9. Added ${quote_local_part.
5436 10. MIME decoding is now applied to the contents of Subject: header lines when
5439 11. Now that a reference to $sender_host_address automatically causes a reverse
5440 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5441 host lookup before query-style lookups in lists that might use this
5442 variable. This has therefore been abolished, and the "net-" prefix is no
5443 longer necessary for query-style lookups.
5445 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5446 have been a typo for LFLAGS, so it has been changed.
5448 13. The install script calls Exim with "-C /dev/null" in order to find the
5449 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5450 to be output. Howeve, since Exim outputs its version number before the
5451 error, it didn't break the script. It just looked ugly. I fixed this by
5452 always allowing "-C /dev/null" if the caller is root.
5454 14. Ignore overlarge ACL variable number when reading spool file - insurance
5455 against a later release with more variables having written the file.
5457 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5458 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5459 this, as well as the form without the "IPv6" on the front.
5461 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5462 OS/Makefile-Darwin file.
5464 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5465 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5467 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5468 variable. However, some OS use ints for inodes. I've added cast to long int
5469 to get rid of the compiler warning.
5471 19. I had forgotten to lock out "/../" in configuration file names when
5472 ALT_CONFIG_PREFIX was set.
5474 20. Routers used for verification do not need to specify transports. However,
5475 if such a router generated a host list, and callout was configured, Exim
5476 crashed, because it could not find a port number from the (non-existent)
5477 transport. It now assumes port 25 in this circumstance.
5479 21. Added the -t option to exigrep.
5481 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5482 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5483 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5484 them is set, LOOKUP_LSEARCH is forced.
5486 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5488 24. Added sender and host information to the "rejected by local_scan()" log
5489 line; previously there was no indication of these.
5491 25. Added .include_if_exists.
5493 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5494 Linux. It turns out that not all file systems support this. Apparently some
5495 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5496 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5497 not supported on the file descriptor, is now ignored when Exim is trying to
5498 sync a directory. This applies only to Linux.
5500 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5502 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5503 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5506 29. Added support for maildirsize files from supplied patch (modified a bit).
5508 30. The use of :fail: followed by an empty string could lead Exim to respond to
5509 sender verification failures with (e.g.):
5511 550 Verification failed for <xxx>
5512 550 Sender verify failed
5514 where the first response line was missing the '-' that indicates it is not
5515 the final line of the response.
5517 31. The loop for finding the name of the user that called Exim had a hardwired
5518 limit of 10; it now uses the value of finduser_retries, which is used for
5519 all other user lookups.
5521 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5524 33. Exim was neglecting to zero errno before one call of strtol() when
5525 expanding a string and expecting an integer value. On some systems this
5526 resulted in spurious "integer overflow" errors. Also, it was casting the
5527 result into an int without checking.
5529 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5530 did not work. The code looks as if it has *never* worked, though it appears
5531 to have been documented since at least releast 1.62. I have made it work.
5533 35. The "timeout_DNS" error in retry rules, also documented since at least
5534 1.62, also never worked. As it isn't clear exactly what this means, and
5535 clearly it isn't a major issue, I have abolished the feature by treating it
5536 as "timeout", and writing a warning to the main and panic logs.
5538 36. The display of retry rules for -brt wasn't always showing the error code
5541 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5542 timeout_connect_A, timeout_connect_MX.
5544 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5545 to the empty sender.
5547 39. The daemon was not analysing the content of -oX till after it had closed
5548 stderr and disconnected from the controlling terminal. This meant that any
5549 syntax errors were only noted on the panic log, and the return code from
5550 the command was 0. By re-arranging the code a little, I've made the
5551 decoding happen first, so such errors now appear on stderr, and the return
5552 code is 1. However, the actual setting up of the sockets still happens in
5553 the disconnected process, so errors there are still only recorded on the
5556 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5557 connections (as happens on some IP stacks) was logged at start up time as
5558 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5559 it from "IPv6 and IPv4", which means that two separate sockets are being
5562 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5563 says whether AF_INET or AF_INET6 was passed as an argument.
5565 42. Exiwhat output was messed up when time zones were included in log
5568 43. Exiwhat now gives more information about the daemon's listening ports,
5569 and whether -tls-on-connect was used.
5571 44. The "port" option of the smtp transport is now expanded.
5573 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5574 silently ignored. Now an error message is written to the main and panic
5577 46. There's a new ACL modifier called "logwrite" which writes to a log file
5578 as soon as it is encountered.
5580 47. Added $local_user_uid and $local_user_gid at routing time.
5582 48. Exim crashed when trying to verify a sender address that was being
5585 49. Exim was recognizing only a space character after ".include". It now also
5586 recognizes a tab character.
5588 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5589 extracting the relevant information from the specification. The man page no
5590 longer contains scrambled data for the -d option, and I've added a section
5591 at the front about calling Exim under different names.
5593 51. Added "extra_headers" argument to the "mail" command in filter files.
5595 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5598 53. Installed eximstats 1.29.
5600 54. Added transport_filter_timeout as a generic transport option.
5602 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5603 Cc: header lines. This was required by RFC 822, but it not required by RFC
5606 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5607 incoming messages that did not have them. Now it does so only if the
5608 message originates locally, that is, if there is no associated remote host
5609 address. When Resent- header lines are present, this applies to the Resent-
5610 lines rather than the non-Resent- lines.
5612 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5613 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5615 58. Messages for configuration errors now include the name of the main
5616 configuration file - useful now that there may be more than one file in a
5617 list (.included file names were always shown).
5619 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5620 for those rare installations that do not start the daemon as root or run it
5621 setuid root. I've cut out the call to initgroups() if the daemon is not
5624 60. The Exim user and group can now be bound into the binary as text strings
5625 that are looked up at the start of Exim's processing.
5627 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5629 62. Added $mailstore_basename variable.
5631 63. Installed patch to sieve.c from Michael Haardt.
5633 64. When Exim failed to open the panic log after failing to open the main log,
5634 the original message it was trying to log was written to stderr and debug
5635 output, but if they were not available (the usual case in production), it
5636 was lost. Now it is written to syslog before the two lines that record the
5637 failures to open the logs.
5639 65. Users' Exim filters run in subprocesses under the user's uid. It is
5640 possible for a "deliver" command or an alias in a "personal" command to
5641 provoke an address rewrite. If logging of address rewriting is configured,
5642 this fails because the process is not running as root or exim. There may be
5643 a better way of dealing with this, but for the moment (because 4.30 needs
5644 to be released), I have disabled address rewrite logging when running a
5645 filter in a non-root, non-exim process.
5651 1. The buildconfig auxiliary program wasn't quoting the value set for
5652 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5653 not defined. This bug was masked in 4.22 by the effect that was fixed in
5656 2. Some messages that were rejected after a message id was allocated were
5657 shown as "incomplete" by exigrep. It no longer does this for messages that
5658 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5660 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5661 have allow_domain_literals set, the ID did not get logged in the <= line.
5662 Domain literals are now always recognized in Message-ID: header lines.
5664 4. The first argument for a ${extract expansion item is the key name or field
5665 number. Leading and trailing spaces in this item were not being ignored,
5666 causing some misleading effects.
5668 5. When deliver_drop_privilege was set, single queue runner processes started
5669 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5670 same command in the process it spins off) were not dropping privilege.
5672 6. When the daemon running as "exim" started a queue runner, it always
5673 re-executed Exim in the spun-off process. This is a waste of effort when
5674 deliver_drop_privilege is set. The new process now just calls the
5675 queue-runner function directly.
5681 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5684 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5685 ignored. Though the use of -oP was forcing the writing of a pid file, it
5686 was always written to the default place.
5688 3. If the message "no IP address found for host xxxx" is generated during
5689 incoming verification, it is now followed by identification of the incoming
5690 connection (so you can more easily find what provoked it).
5692 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5694 5. Added some features to "harden" Exim a bit more against certain attacks:
5696 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5697 be put in Local/Makefile. This is like the never_users runtime option,
5698 but it cannot be overridden. The default setting is "root".
5700 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5701 prefix string with which any file named in a -C command line option
5704 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5705 is retained for -C and -D only if the caller of Exim is root. Without
5706 it, the exim user may also use -C and -D and retain privilege.
5708 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5709 command line option is disabled.
5711 6. Macro names set by the -D option must start with an upper case letter, just
5712 like macro names defined in the configuration file.
5714 7. Added "dereference=" facility to LDAP.
5716 8. Two instances of the typo "uknown" in the source files are fixed.
5718 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5719 the Configure-Makefile script screwed up while processing it.
5721 10. Incorporated PCRE 4.4.
5723 11. The SMTP synchronization check was not operating right at the start of an
5724 SMTP session. For example, it could not catch a HELO sent before the client
5725 waited for the greeting. There is now a check for outstanding input at the
5726 point when the greeting is written. Because of the duplex, asynchronous
5727 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5728 way, but not yet received, when the check is performed.
5730 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5731 on TCP/IP sockets, because this apparently causes some broken clients to
5734 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5735 unchanged) from the Cygwin maintainer.
5737 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5738 was supported instead of testing for mbx. Effectively a typo.
5740 15. The spa authenticator server code was not checking that the input it
5741 received was valid base64.
5743 16. The debug output line for the "set" modifier in ACLs was not showing the
5744 name of the variable that was being set.
5746 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5748 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5749 lookup on its own. Something else was needed to trigger the lookup. For
5750 example, a match in host_lookup or the need for a host name in a host list.
5751 Now, if $sender_host_name is referenced and the host name has not yet been
5752 looked up, a lookup is performed. If the lookup fails, the variable remains
5753 empty, and $host_lookup_failed is set to "1".
5755 19. Added "eqi" as a case-independent comparison operator.
5757 20. The saslauthd authentication condition could segfault if neither service
5758 nor realm was specified.
5760 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5761 error message that was logged was misleading, and incoming SMTP
5762 connections were dropped. The message is now more accurate, and temporary
5763 errors are given to SMTP connections.
5765 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5766 (except RSET) with a 421 error, until QUIT is received. However, it was
5767 failing to send a response to QUIT.
5769 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5770 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5771 ACL is now run after the helo_try_verify_hosts code.
5773 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5774 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5775 case-independent, so other case variants are also recognized). Apparently
5776 some systems use these upper case variants.
5778 25. If more than two messages were waiting for the same host, and a transport
5779 filter was specified for the transport, Exim sent two messages over the
5780 same TCP/IP connection, and then failed with "socket operation on non-
5781 socket" when it tried to send the third.
5783 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5785 27. The extern definition of crypt16() in expand.c was not being excluded when
5786 the OS had its own crypt16() function.
5788 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5789 as a preferred synonym for return_size_limit, both as an option and as an
5792 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5794 30. Changed the default configuration ACL to relax the local part checking rule
5795 for addresses that are not in any local domains. For these addresses,
5796 slashes and pipe symbols are allowed within local parts, but the sequence
5797 /../ is explicitly forbidden.
5799 31. SPA server authentication was not clearing the challenge buffer before
5802 32. log_message in a "warn" ACL statement was writing to the reject log as
5803 well as to the main log, which contradicts the documentation and doesn't
5804 seem right (because no rejection is happening). So I have stopped it.
5806 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5807 However, I am unable to do any testing of this.
5809 34. Fixed an infelicity in the appendfile transport. When checking directories
5810 for a mailbox, to see if any needed to be created, it was accidentally
5811 using path names with one or more superfluous leading slashes; tracing
5812 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5814 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5815 contents are added to the log line that is written for every discarded
5816 recipient. (Previously a log_message setting was ignored.)
5818 36. The ${quote: operator now quotes the string if it is empty.
5820 37. The install script runs exim in order to find its version number. If for
5821 some reason other than non-existence or emptiness, which it checks, it
5822 could not run './exim', it was installing it with an empty version number,
5823 i.e. as "exim-". This error state is now caught, and the installation is
5826 38. An argument was missing from the function that creates an error message
5827 when Exim fails to connect to the socket for saslauthd authentication.
5828 This could cause Exim to crash, or give a corrupted message.
5830 39. Added isip, isip4, and isip6 to ${if conditions.
5832 40. The ACL variables $acl_xx are now saved with the message, and can be
5833 accessed later in routers, transports, and filters.
5835 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5836 strings in the file are not string-expanded.
5838 42. If a MAIL command specified a SIZE value that was too large to fit into an
5839 int variable, the check against message_size_limit failed. Such values are
5840 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5841 day this will have to be increased, but I don't think I want to be around
5842 when emails are that large.
5849 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5850 iconv() is not standard in FreeBSD.
5852 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5853 IPv6 enabled. The observed symptom was a segmentation fault on return from
5854 the function os_common_find_running_interfaces() in src/os.c.
5856 3. In the check_special_case() function in daemon.c I had used "errno" as an
5857 argument name, which causes warnings on some systems. This was basically a
5858 typo, since it was named "eno" in the comments!
5860 4. The code that waits for the clock to tick (at a resolution of some fraction
5861 of a second) so as to ensure message-id uniqueness was always waiting for
5862 at least one whole tick, when it could have waited for less. [This is
5863 almost certainly not relevant at current processor speeds, where it is
5864 unlikely to ever wait at all. But we try to future-proof.]
5866 5. The function that sleeps for a time interval that includes fractions of a
5867 second contained a race. It did not block SIGALRM between setting the
5868 timer, and suspending (a couple of lines later). If the interval was short
5869 and the sigsuspend() was delayed until after it had expired, the suspension
5870 never ended. On busy systems this could lead to processes getting stuck for
5873 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5874 process, before it forks any delivery processes. The open lookup caching
5875 mechanism meant that the open file or database connection was passed into
5876 the delivery process. The problem was that delivery processes always tidy
5877 up cached lookup data. This could cause a problem for the next delivery
5878 process started by the queue runner, because the external queue runner
5879 process does not know about the closure. So the next delivery process
5880 still has data in the lookup cache. In the case of a file lookup, there was
5881 no problem because closing a file descriptor in a subprocess doesn't affect
5882 the parent. However, if the lookup was caching a connection to a database,
5883 the connection was closed, and the second delivery process was likely to
5884 see errors such as "PGSQL: query failed: server closed the connection
5885 unexpectedly". The problem has been fixed by closing all cached lookups
5886 in a queue runner before running a delivery process.
5888 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5889 seem to have the "const" qualifier which it has on other OS. I've
5892 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5893 *of the same type* (client or server) with the same public name that an
5894 error should be diagnosed.
5896 9. When Exim looked up a host name for an IP address, but failed to find the
5897 original IP address when looking up the host name (a safety check), it
5898 output the message "<ip address> does not match any IP for NULL", which was
5899 confusing, to say the least. The bug was that the host name should have
5900 appeared instead of "NULL".
5902 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5903 user that is built into the binary, and the -C or -D options is used, root
5904 privilege is dropped before the configuration file is read. In addition,
5905 logging is switched to stderr instead of the normal log files. If the
5906 configuration then re-defines the Exim user, the unprivileged environment
5907 is probably not what is expected, so Exim logs a panic warning message (but
5910 However, if deliver_drop_privilege is set, the unprivileged state may well
5911 be exactly what is intended, so the warning has been cut out in that case,
5912 and Exim is allowed to try to write to its normal log files.
5918 1. smtp_return_error_details was not giving details for temporary sender
5919 or receiver verification errors.
5921 2. Diagnose a configuration error if two authenticators have the same public
5924 3. Exim used not to create the message log file for a message until the first
5925 delivery attempt. This could be confusing when incoming messages were held
5926 for policy or load reasons. The message log file is now created at the time
5927 the message is received, and an initial "Received" line is written to it.
5929 4. The automatically generated man page for command line options had a minor
5930 bug that caused no ill effects; however, a more serious problem was that
5931 the procedure for building the man page automatically didn't always
5932 operate. Consequently, release 4.20 contains an out-of-date version. This
5933 shouldn't happen again.
5935 5. When building Exim with embedded Perl support, the script that builds the
5936 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5937 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5939 6. The freeze_tell option was not being used for messages that were frozen on
5940 arrival, either by an ACL or by local_scan().
5942 7. Added the smtp_incomplete_transaction log selector.
5944 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5945 was accepting AUTH without a new EHLO.
5947 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5948 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5951 10. Logging of TCP/IP connections (when configured) now happens in the main
5952 daemon process instead of the child process, so that the TCP/IP connection
5953 count is more accurate (but it can never be perfect).
5955 11. The use of "drop" in a nested ACL was not being handled correctly in the
5956 outer ACL. Now, if condition failure induced by the nested "drop" causes
5957 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5958 or "require"), the connection is dropped.
5960 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5961 that yield "discard" can now be used with an "accept" or a "discard" verb,
5962 but an error is generated for any others (because I can't see a useful way
5963 to define what should happen).
5965 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5966 are now processed in the same way as lines in the Exim configuration file.
5967 In particular, continuation lines are supported.
5969 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5971 15. Added -ti meaning -t -i.
5973 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5974 domains, and warn by logging if others are found.
5976 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5977 returned from GIFCONF when Exim is trying to find the list of interfaces on
5978 a host. The code in os.c has been modified to copy each ifreq to an aligned
5979 structure in all cases.
5981 Also, in some cases, the returned ifreq's were being copied to a 'struct
5982 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5983 means the last couple of bytes of an IPv6 address could be chopped if the
5984 ifreq contained only a normal sockaddr (14 bytes storage).
5986 18. Named domain lists were not supported in the hosts_treat_as_local option.
5987 An entry such as +xxxx was not recognized, and was treated as a literal
5990 19. Ensure that header lines added by a DATA ACL are included in the reject log
5991 if the ACL subsequently rejects the message.
5993 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5994 MD5 (which is deprecated).
5996 21. When testing a filter file using -bf, Exim was writing a message when it
5997 took the sender from a "From " line in the message, but it was not doing so
5998 when it took $return_path from a Return-Path: header line. It now does.
6000 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6001 with a valid header line field name (a series of printing characters
6002 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6004 23. Changed "disc" in the source to "disk" to conform to the documentation and
6005 the book and for uniformity.
6007 24. Ignore Sendmail's -Ooption=value command line item.
6009 25. When execve() failed while trying to run a command in a pipe transport,
6010 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
6011 could be confused with a return value of 69 from the command itself. This
6012 has been changed to 127, the value the shell returns if it is asked to run
6013 a non-existent command. The wording for the related log line suggests a
6014 non-existent command as the problem.
6016 26. If received_header_text expands to an empty string, do not add a Received:
6017 header line to the message. (Well, it adds a token one on the spool, but
6018 marks it "old" so that it doesn't get used or transmitted.)
6020 27. Installed eximstats 1.28 (addition of -nt option).
6022 28. There was no check for failure on the call to getsockname() in the daemon
6023 code. This can fail if there is a shortage of resources on the system, with
6024 ENOMEM, for example. A temporary error is now given on failure.
6026 29. Contrary to the C standard, it seems that in some environments, the
6027 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6028 program. Exim now does this explicitly; it affects the formatting of
6029 timestamps using strftime().
6031 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6032 complaints. I've now initialized all the variables, to avoid this.
6034 32. Header lines added by a system filter were not being "seen" during
6035 transport-time rewrites.
6037 33. The info_callback() function passed to OpenSSL is set up with type void
6038 (*)(SSL *, int, int), as described somewhere. However, when calling the
6039 function (actually a macro) that sets it up, the type void(*)() is
6040 expected. I've put in a cast to prevent warnings from picky compilers.
6042 34. If a DNS black list lookup found a CNAME record, but there were no A
6043 records associated with the domain it pointed at, Exim crashed.
6045 35. If a DNS black list lookup returned more than one A record, Exim ignored
6046 all but the first. It now scans all returned addresses if a particular IP
6047 value is being sought. In this situation, the contents of the
6048 $dnslist_value variable are a list of all the addresses, separated by a
6051 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6052 to accept a host name and all its aliases if the forward lookup for any of
6053 them yielded the IP address of the incoming connection. Now it accepts only
6054 those names whose forward lookup yields the correct IP address. Any other
6055 names are discarded. This closes a loophole whereby a rogue DNS
6056 administrator could create reverse DNS records to break through a
6057 wildcarded host restriction in an ACL.
6059 37. If a user filter or a system filter that ran in a subprocess used any of
6060 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6061 the wrong values were passed to the pipe command ($thisaddress had the
6062 value of $0, $0 had the value of $1, etc). This bug was introduced by
6063 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6065 38. Improved the line breaking for long SMTP error messages from ACLs.
6066 Previously, if there was no break point between 40 and 75 characters, Exim
6067 left the rest of the message alone. Two changes have been made: (a) I've
6068 reduced the minimum length to 35 characters; (b) if it can't find a break
6069 point between 35 and 75 characters, it looks ahead and uses the first one
6070 that it finds. This may give the occasional overlong line, but at least the
6071 remaining text gets split now.
6073 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6074 file descriptors might be low, and that setting 1000 would always raise it.
6075 It turns out that in some environments, the limit is already over 1000 and
6076 that lowering it causes trouble. So now Exim takes care not to decrease it.
6078 40. When delivering a message, the value of $return_path is set to $sender_
6079 address at the start of routing (routers may change the value). By an
6080 oversight, this default was not being set up when an address was tested by
6081 -bt or -bv, which affected the outcome if any router or filter referred to
6084 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6085 log only when "message" or "log_message" are set. However, if one of the
6086 conditions was an address verification, or a call to a nested ACL, the
6087 messages generated by the underlying test were being passed through. This
6088 no longer happens. The underlying message is available in $acl_verify_
6089 message for both "message" and "log_message" expansions, so it can be
6090 passed through if needed.
6092 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6093 new expansion $bh_ to give the encoded byte string without charset
6094 translation. Translation happens only if iconv() is available; HAVE_ICONV
6095 indicates this at build time. HEADERS_CHARSET gives the charset to
6096 translate to; headers_charset can change it in the configuration, and
6097 "headers charset" can change it in an individual filter file.
6099 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6100 that creates RFC 2047 encoded "words" labels them as that charset instead
6101 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6102 expansion operator; (ii) when Exim creates a From: line for a local
6103 message; (iii) when a header line is rewritten to include a "phrase" part.
6105 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6106 buggy, causing it to skip the first lines of messages whose message ID
6107 ended in 'D'. This would not have bitten before Exim release 4.14, because
6108 message IDs were unlikely to end in 'D' before then. The effect was to have
6109 incorrect size information for certain domains.
6111 45. #include "config.h" was missing at the start of the crypt16.c module. This
6112 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6115 46. If there was a timeout during a "random" callout check, Exim treated it as
6116 a failure of the random address, and carried on sending RSET and the real
6117 address. If the delay was just some slowness somewhere, the response to the
6118 original RCPT would be taken as a response to RSET and so on, causing
6119 mayhem of various kinds.
6121 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6122 when I implemented it. It didn't allow for the fact that some option values
6123 may legitimatetly be negative (e.g. size_addition), and it didn't even do
6124 the right test for positive values.
6126 48. Domain names in DNS records are case-independent. Exim always looks them up
6127 in lower case. Some resolvers return domain names in exactly the case they
6128 appear in the zone file, that is, they may contain uppercase letters. Not
6129 all resolvers do this - some return always lower case. Exim was treating a
6130 change of case by a resolver as a change of domain, similar to a widening
6131 of a domain abbreviation. This triggered its re-routing code and so it was
6132 trying to route what was effectively the same domain again. This normally
6133 caused routing to fail (because the router wouldn't handle the domain
6134 twice). Now Exim checks for this case specially, and just changes the
6135 casing of the domain that it ultimately uses when it transmits the message
6138 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6141 50. If a filter generated a file delivery with a non-absolute name (possible if
6142 no home directory exists for the router), the forbid_file option was not
6145 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6146 the existing equality matching.
6148 52. Exim was using ints instead of ino_t variables in some places where it was
6149 dealing with inode numbers.
6151 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6152 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6153 called TMPDIR, and if it finds it is different, it changes its value.
6155 54. The smtp_printf() function is now made available to local_scan() so
6156 additional output lines can be written before returning. There is also an
6157 smtp_fflush() function to enable the detection of a dropped connection.
6158 The variables smtp_input and smtp_batched_input are exported to
6161 55. Changed the default runtime configuration: the message "Unknown user"
6162 has been removed from the ACL, and instead placed on the localuser router,
6163 using the cannot_route_message feature. This means that any verification
6164 failures that generate their own messages won't get overridden. Similarly,
6165 the "Unrouteable address" message that was in the ACL for unverifiable
6166 relay addresses has also been removed.
6168 56. Added hosts_avoid_esmtp to the smtp transport.
6170 57. The exicyclog script was not checking for the esoteric option
6171 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6172 will work only if exicyclog is run under the appropriate euid.
6174 58. Following a discussion on the list, the rules by which Exim recognises line
6175 endings on incoming messages have been changed. The -dropcr and drop_cr
6176 options are now no-ops, retained only for backwards compatibility. The
6177 following line terminators are recognized: LF CRLF CR. However, special
6178 processing applies to CR:
6180 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6181 nor a local message in the state where . is a terminator.
6183 (ii) If a bare CR is encountered in a header line, an extra space is added
6184 after the line terminator so as not to end the header. The reasoning
6185 behind this is that bare CRs in header lines are most likely either
6186 to be mistakes, or people trying to play silly games.
6188 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6189 was being incorrectly given as 18 bytes larger than it should have been.
6190 This is a VOB (very old bug).
6192 60. This may never have affected anything current, but just in case it has:
6193 When the local host is found other than at the start of a list of hosts,
6194 the local host, those with the same MX, and any that follow, are discarded.
6195 When the list in question was part of a longer list of hosts, the following
6196 hosts (not currently being processed) were also being discarded. This no
6197 longer happens. I'm not sure if this situation could ever has previously
6200 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6203 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6204 header. This is something that is recommended in a new Internet Draft, and
6205 is something that is documented as being done by Sendmail. There are two
6206 possible values. For messages generated by the autoreply transport, Exim
6209 Auto-Submitted: auto-replied
6211 whereas for all other generated messages (e.g. bounces) it adds
6213 Auto-Submitted: auto-generated
6215 63. The "personal" condition in filters now includes a test for the
6216 Auto-Submitted: header. If it contains the string "auto-" the message it
6217 not considered personal.
6219 64. Added rcpt_include_affixes as a generic transport option.
6221 65. Added queue_only_override (default true).
6223 66. Added the syslog_duplication option.
6225 67. If what should have been the first header line of a message consisted of
6226 a space followed by a colon, Exim was mis-interpreting it as a header line.
6227 It isn't of course - it is syntactically invalid and should therefore be
6228 treated as the start of the message body. The misbehaviour could have
6229 caused a number of strange effects, including loss of data in subsequent
6230 header lines, and spool format errors.
6232 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6233 client host had authenticated. This control can now be exercised by an ACL
6234 for more flexibility.
6236 69. By default, callouts do not happen when testing with -bh. There is now a
6237 variant, -bhc, which does actually run the callout code, including
6238 consulting and updating the callout cache.
6240 70. Added support for saslauthd authentication, courtesy of Alexander
6243 71. If statvfs() failed on the spool or log directories while checking their
6244 size for availability, Exim confusingly gave the error "space shortage".
6245 Furthermore, in debugging mode it crashed with a floating point exception.
6246 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6247 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6248 serious problem, Exim now writes to the main and panic logs when this
6249 happens, with details of the failure. It then refuses to accept the
6250 incoming message, giving the message "spool directory problem" or "log
6251 directory problem" with a 421 code for SMTP messages.
6253 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6254 0, 1, and 2 exist, because some OS complain for execs without them (see
6255 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6256 descriptors. However, the code omitted to check that the open succeeded,
6257 causing mysterious errors if for some reason the permissions on /dev/null
6258 got screwed. Now Exim writes a message to the main and panic logs, and
6259 bombs out if it can't open /dev/null.
6261 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6262 interact so that it is all more flexible. It is supposed to remain
6263 backwards compatible. Also added extra_local_interfaces.
6265 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6266 to bomb out with an assertion failure - to the client this appears as a
6267 connection drop. This problem occurs in the part of the code that was taken
6268 from the Samba project. Fortunately, the assertion is in a very simple
6269 function, so I have fixed this by reproducing the function inline in the
6270 one place where it is called, and arranging for authentication to fail
6271 instead of killing the process with assert().
6273 75. The SPA client code was not working when the server requested OEM rather
6274 than Unicode encoding.
6276 76. Added code to make require_files with a specific uid setting more usable in
6277 the case where statting the file as root fails - usually a non-root-mounted
6278 NFS file system. When this happens and the failure is EACCES, Exim now
6279 forks a subprocess and does the per-uid checking as the relevant uid.
6281 77. Added process_log_path.
6283 78. If log_file_path was not explicitly set, a setting of check_log_space or
6284 check_log_inodes was ignored.
6286 79. If a space check for the spool or log partitions fails, the incident is now
6287 logged. Of course, in the latter case the data may get lost...
6289 80. Added the %p formatting code to string_format() so that it can be used to
6290 print addresses in debug_print(). Adjusted all the address printing in the
6291 debugging in store.c to use %p rather than %d.
6293 81. There was a concern that a line of code in smtp_in.c could overflow a
6294 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6295 initially expressed, the concern was not well-founded, because trailing
6296 spaces are removed early. However, if the trailing spaces were followed by
6297 a NULL, they did not get removed, so the overflow was possible. Two fixes
6300 (a) I re-wrote the offending code in a cleaner fashion.
6301 (b) If an incoming SMTP command contains a NULL character, it is rejected
6304 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6305 runs initgroups(), so that if the Exim user is in any additional groups,
6306 they will be used during message reception.
6312 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob