1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
10 JH/02 The smtp transport option "multi_domain" is now expanded.
12 JH/03 The smtp transport now requests PRDR by default, if the server offers
15 JH/04 Certificate name checking on server certificates, when exim is a client,
16 is now done by default. The transport option tls_verify_cert_hostname
17 can be used to disable this per-host. The build option
18 EXPERIMENTAL_CERTNAMES is withdrawn.
20 JH/05 The value of the tls_verify_certificates smtp transport and main options
21 default to the word "system" to access the system default CA bundle.
22 For GnuTLS, only version 3.0.20 or later.
24 JH/06 Verification of the server certificate for a TLS connection is now tried
25 (but not required) by default. The verification status is now logged by
26 default, for both outbound TLS and client-certificate supplying inbound
32 TL/01 When running the test suite, the README says that variables such as
33 no_msglog_check are global and can be placed anywhere in a specific
34 test's script, however it was observed that placement needed to be near
35 the beginning for it to behave that way. Changed the runtest perl
36 script to read through the entire script once to detect and set these
37 variables, reset to the beginning of the script, and then run through
38 the script parsing/test process like normal.
40 TL/02 The BSD's have an arc4random API. One of the functions to induce
41 adding randomness was arc4random_stir(), but it has been removed in
42 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
43 function when detected.
45 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
46 cause callback expansion.
48 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
49 syntax errors in an expansion can be treated as a string instead of
50 logging or causing an error, due to the internal use of bool_lax
51 instead of bool when processing it.
53 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
54 server certificates when making smtp deliveries.
56 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
58 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
60 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
62 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
63 Merged patch from Sebastian Wiedenroth.
65 JH/05 Fix results-pipe from transport process. Several recipients, combined
66 with certificate use, exposed issues where response data items split
67 over buffer boundaries were not parsed properly. This eventually
68 resulted in duplicates being sent. This issue only became common enough
69 to notice due to the introduction of conection certificate information,
70 the item size being so much larger. Found and fixed by Wolfgang Breyha.
72 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
73 size buffer was used, resulting in syntax errors when an expansion
76 JH/07 Add support for directories of certificates when compiled with a GnuTLS
77 version 3.3.6 or later.
79 JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef
80 is EXPERIMENTAL_EVENT, the main-configuration and transport options
81 both become "event_action", the variables become $event_name, $event_data
82 and $event_defer_errno. There is a new variable $verify_mode, usable in
83 routers, transports and related events. The tls:cert event is now also
84 raised for inbound connections, if the main configuration event_action
87 TL/06 In test suite, disable OCSP for old versions of openssl which contained
88 early OCSP support, but no stapling (appears to be less than 1.0.0).
90 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
91 server certificate names available under the smtp transport option
92 "tls_verify_cert_hostname" now do not permit multi-component wildcard
95 JH/10 Time-related extraction expansions from certificates now use the main
96 option "timezone" setting for output formatting, and are consistent
97 between OpenSSL and GnuTLS compilations. Bug 1541.
99 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
100 encoded parameter in the incoming message. Bug 1558.
102 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
103 include certificate info, eximon was claiming there were spoolfile
106 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
108 JH/14 Log delivery-related information more consistently, using the sequence
109 "H=<name> [<ip>]" wherever possible.
111 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
112 are problematic for Debian distribution, omit them from the release
115 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
117 JH/16 Fix string representation of time values on 64bit time_t anchitectures.
120 JH/17 Fix a null-indirection in certextract expansions when a nondefault
121 output list separator was used.
126 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
127 checkers that were complaining about end of non-void function with no
130 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
131 This was a regression intruduced in 4.83 by another bugfix.
133 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
135 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
136 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
142 TF/01 Correctly close the server side of TLS when forking for delivery.
144 When a message was received over SMTP with TLS, Exim failed to clear up
145 the incoming connection properly after forking off the child process to
146 deliver the message. In some situations the subsequent outgoing
147 delivery connection happened to have the same fd number as the incoming
148 connection previously had. Exim would try to use TLS and fail, logging
149 a "Bad file descriptor" error.
151 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
152 utilities have not been installed.
154 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
155 temporary space as the ACL may create new global variables.
157 TL/01 LDAP support uses per connection or global context settings, depending
158 upon the detected version of the libraries at build time.
160 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
161 to extract and use the src ip:port in logging and expansions as if it
162 were a direct connection from the outside internet. PPv2 support was
163 updated based on HAProxy spec change in May 2014.
165 JH/02 Add ${listextract {number}{list}{success}{fail}}.
167 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
168 Properly escape header and check for NULL return.
170 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
173 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
175 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
176 characters in header names, implemented as a verify condition.
177 Contributed by Michael Fischer v. Mollard.
179 TL/05 Rename SPF condition results err_perm and err_temp to standardized
180 results permerror and temperror. Previous values are deprecated but
181 still accepted. In a future release, err_perm and err_temp will be
182 completely removed, which will be a backward incompatibility if the
183 ACL tests for either of these two old results. Patch contributed by
184 user bes-internal on the mailing list.
186 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
188 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
189 selectors, in both main and reject logs.
191 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
194 JH/07 Add malware type "sock" for talking to simple daemon.
196 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
198 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
199 routers/transports under cutthrough routing.
201 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
202 numbers. Touch up "bool" conditional to keep the same definition.
204 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
206 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
208 JH/12 Expand items in router/transport headers_add or headers_remove lists
209 individually rather than the list as a whole. Bug 1452.
211 Required for reasonable handling of multiple headers_ options when
212 they may be empty; requires that headers_remove items with embedded
213 colons must have them doubled (or the list-separator changed).
215 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
216 view the policy declared in the DMARC record. Currently, $dmarc_status
217 is a combined value of both the record presence and the result of the
220 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
222 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
223 dnslookup router and the smtp transport (applying to the forward
226 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
227 of ldap servers used for a specific lookup. Patch provided by Heiko
230 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
231 New variable $lookup_dnssec_authenticated for observability.
233 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
234 Patch submitted by Lars Timman.
236 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
238 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
239 Requires trusted mode and valid format message id, aborts otherwise.
240 Patch contributed by Heiko Schlichting.
242 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
243 certextract with support for various fields. Bug 1358.
245 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
246 is requested by default, modifiable by smtp transport option
249 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
250 operate on certificate variables to give certificate fingerprints
251 Also new ${sha256:cert_variable}.
253 JH/23 The PRDR feature is moved from being Experimental into the mainline.
255 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
256 Christian Aistleitner.
258 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
260 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
261 file. Patch from Wolfgang Breyha.
263 JH/25 Expand the coverage of the delivery $host and $host_address to
264 client authenticators run in verify callout. Bug 1476.
266 JH/26 Port service names are now accepted for tls_on_connect_ports, to
267 align with daemon_smtp_ports. Bug 72.
269 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
270 support and error reporting did not work properly.
272 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
273 and is readable. Patch from Andrew Colin Kissa.
275 TL/14 Enhance documentation of ${run expansion and how it parses the
276 commandline after expansion, particularly in the case when an
277 unquoted variable expansion results in an empty value.
279 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
281 PP/02 Fix internal collision of T_APL on systems which support RFC3123
282 by renaming away from it. Addresses GH issue 15, reported by
285 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
287 TL/15 SECURITY: prevent double expansion in math comparison functions
288 (can expand unsanitized data). Not remotely exploitable.
295 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
297 PP/02 Make -n do something, by making it not do something.
298 When combined with -bP, the name of an option is not output.
300 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
303 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
304 $sender_host_name and config options to manage this, and basic check
307 PP/05 DSCP support for outbound connections and control modifier for inbound.
309 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
310 (Only plugin which currently uses this is kerberos4, which nobody should
311 be using, but we should make it available and other future plugins might
312 conceivably use it, even though it would break NAT; stuff *should* be
313 using channel bindings instead).
315 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
316 name; added for Sendmail compatibility; requires admin caller.
317 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
318 just ignore it); requires trusted caller.
319 Also parse but ignore: -Ac -Am -X<logfile>
322 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
324 TL/02 Add +smtp_confirmation as a default logging option.
326 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
327 Patch by Magnus Holmgren from 2007-02-20.
329 TL/04 Bugzilla 1281 - Spec typo.
330 Bugzilla 1283 - Spec typo.
331 Bugzilla 1290 - Spec grammar fixes.
333 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
335 TL/06 Add Experimental DMARC support using libopendmarc libraries.
337 TL/07 Fix an out of order global option causing a segfault. Reported to dev
338 mailing list by by Dmitry Isaikin.
340 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
342 JH/02 Support "G" suffix to numbers in ${if comparisons.
344 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
346 NM/01 Bugzilla 1197 - Spec typo
347 Bugzilla 1196 - Spec examples corrections
349 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
351 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
352 gnutls_enable_pkcs11, but renamed to more accurately indicate its
355 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
356 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
358 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
359 "acl {{name}{arg}...}", and optional args on acl condition
362 JH/05 Permit multiple router/transport headers_add/remove lines.
364 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
366 JH/07 Avoid using a waiting database for a single-message-only transport.
367 Performance patch from Paul Fisher. Bugzilla 1262.
369 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
372 JH/09 Add $headers_added variable, with content from use of ACL modifier
373 add_header (but not yet added to the message). Bugzilla 199.
375 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
376 Pulled from Bugzilla 817 by Wolfgang Breyha.
378 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
380 (nb: this is the same fix as in Exim 4.80.1)
382 JH/11 Add A= logging on delivery lines, and a client_set_id option on
385 JH/12 Add optional authenticated_sender logging to A= and a log_selector
388 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
390 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
391 advertise SMTP AUTH mechanism to us, instead of a generic
392 protocol violation error. Also, make Exim more robust to bad
393 data from the Dovecot auth socket.
395 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
397 When a queue runner is handling a message, Exim first routes the
398 recipient addresses, during which it prunes them based on the retry
399 hints database. After that it attempts to deliver the message to
400 any remaining recipients. It then updates the hints database using
403 So if a recipient address works intermittently, it can get repeatedly
404 deferred at routing time. The retry hints record remains fresh so the
405 address never reaches the final cutoff time.
407 This is a fairly common occurrence when a user is bumping up against
408 their storage quota. Exim had some logic in its local delivery code
409 to deal with this. However it did not apply to per-recipient defers
410 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
412 This change adds a proper retry rule check during routing so that the
413 final cutoff time is checked against the message's age. We only do
414 this check if there is an address retry record and there is not a
415 domain retry record; this implies that previous attempts to handle
416 the address had the retry_use_local_parts option turned on. We use
417 this as an approximation for the destination being like a local
418 delivery, as in LMTP.
420 I suspect this new check makes the old local delivery cutoff check
421 redundant, but I have not verified this so I left the code in place.
423 TF/02 Correct gecos expansion when From: is a prefix of the username.
425 Test 0254 submits a message to Exim with the header
429 When I ran the test suite under the user fanf2, Exim expanded
430 the header to contain my full name, whereas it should have added
431 a Resent-Sender: header. It erroneously treats any prefix of the
432 username as equal to the username.
434 This change corrects that bug.
436 GF/01 DCC debug and logging tidyup
437 Error conditions log to paniclog rather than rejectlog.
438 Debug lines prefixed by "DCC: " to remove any ambiguity.
440 TF/03 Avoid unnecessary rebuilds of lookup-related code.
442 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
443 Bug spotted by Jeremy Harris; was flawed since initial commit.
444 Would have resulted in OCSP responses post-SNI triggering an Exim
445 NULL dereference and crash.
447 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
449 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
450 Bug detection, analysis and fix by Samuel Thibault.
451 Bugzilla 1331, Debian bug #698092.
453 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
455 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
456 Server implementation by Todd Lyons, client by JH.
457 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
458 config variable "prdr_enable" controls whether the server
459 advertises the facility. If the client requests PRDR a new
460 acl_data_smtp_prdr ACL is called once for each recipient, after
461 the body content is received and before the acl_smtp_data ACL.
462 The client is controlled by bolth of: a hosts_try_prdr option
463 on the smtp transport, and the server advertisement.
464 Default client logging of deliveries and rejections involving
465 PRDR are flagged with the string "PRDR".
467 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
468 fclose(). Diagnosis by Todd Lyons.
470 PP/17 Update configure.default to handle IPv6 localhost better.
471 Patch by Alain Williams (plus minor tweaks).
474 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
475 This is now consistent with GnuTLS, and is now documented: the
476 previous undocumented portable approach to treating the option as
477 unset was to force an expansion failure. That still works, and
478 an empty string is now equivalent.
480 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
481 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
482 not performing validation itself.
484 PP/20 Added force_command boolean option to pipe transport.
485 Patch from Nick Koston, of cPanel Inc.
487 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
490 TF/04 Added udpsend ACL modifer and hexquote expansion operator
492 PP/21 Fix eximon continuous updating with timestamped log-files.
493 Broken in a format-string cleanup in 4.80, missed when I repaired the
494 other false fix of the same issue.
495 Report and fix from Heiko Schlichting.
498 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
499 Report from Prashanth Katuri.
501 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
502 It's SecureTransport, so affects any MacOS clients which use the
503 system-integrated TLS libraries, including email clients.
505 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
506 using a MIME ACL for non-SMTP local injection.
507 Report and assistance in diagnosis by Warren Baker.
509 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
511 JH/16 Fix comparisons for 64b. Bugzilla 1385.
513 TL/09 Add expansion variable $authenticated_fail_id to keep track of
514 last id that failed so it may be referenced in subsequent ACL's.
516 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
519 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
520 ldap library initialization, allowing self-signed CA's to be
521 used. Also properly sets require_cert option later in code by
522 using NULL (global ldap config) instead of ldap handle (per
523 session). Bug diagnosis and testing by alxgomz.
525 TL/12 Enhanced documentation in the ratelimit.pl script provided in
526 the src/util/ subdirectory.
528 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
529 renamed to Transport Post Delivery Action by Jeremy Harris, as
532 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
533 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
534 redis_servers = needs to be configured which will be used by the redis
535 lookup. Patch from Warren Baker, of The Packet Hub.
537 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
539 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
540 hostname or reverse DNS when processing a host list. Used suggestions
541 from multiple comments on this bug.
543 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
545 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
546 Missed a few lines, added it to make the runtest require no keyboard
549 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
550 contains upper case chars. Make router use caseful_local_part.
552 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
553 support when GnuTLS has been built with p11-kit.
559 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
561 This, or similar/improved, will also be change PP/11 of 4.82.
567 PP/01 Handle short writes when writing local log-files.
568 In practice, only affects FreeBSD (8 onwards).
569 Bugzilla 1053, with thanks to Dmitry Isaikin.
571 NM/01 Bugzilla 949 - Documentation tweak
573 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
576 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
578 PP/02 Implemented gsasl authenticator.
580 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
582 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
583 `pkg-config foo` for cflags/libs.
585 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
586 with rest of GSASL and with heimdal_gssapi.
588 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
589 `pkg-config foo` for cflags/libs for the TLS implementation.
591 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
592 properties get this fed in as external SSF. A number of robustness
593 and debugging improvements to the cyrus_sasl authenticator.
595 PP/08 cyrus_sasl server now expands the server_realm option.
597 PP/09 Bugzilla 1214 - Log authentication information in reject log.
598 Patch by Jeremy Harris.
600 PP/10 Added dbmjz lookup type.
602 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
604 PP/12 MAIL args handles TAB as well as SP, for better interop with
605 non-compliant senders.
606 Analysis and variant patch by Todd Lyons.
608 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
609 Bug report from Lars Müller <lars@samba.org> (via SUSE),
610 Patch from Dirk Mueller <dmueller@suse.com>
612 PP/13 tls_peerdn now print-escaped for spool files.
613 Observed some $tls_peerdn in wild which contained \n, which resulted
614 in spool file corruption.
616 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
617 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
618 or write after TLS renegotiation, which otherwise led to messages
621 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
622 as a tracking header (ie: a signed header comes before the signature).
623 Patch from Wolfgang Breyha.
625 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
626 comma-sep list; embedded commas doubled.
628 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
630 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
632 Report and patch from Dmitry Banschikov.
634 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
635 Removed SSL_clear() after SSL_new() which led to protocol negotiation
636 failures. We appear to now support TLS1.1+ with Exim.
638 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
639 lets Exim select keys and certificates based upon TLS SNI from client.
640 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
641 before an outbound SMTP session. New log_selector, +tls_sni.
643 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
644 NULL dereference. Report and patch from Alun Jones.
646 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
647 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
648 Not seeing resolver debug output on NetBSD, but suspect this is a
649 resolver implementation change.
651 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
652 Left warnings. Added "eximon gdb" invocation mode.
654 PP/21 Defaulting "accept_8bitmime" to true, not false.
656 PP/22 Added -bw for inetd wait mode support.
658 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
659 locate the relevant includes and libraries. Made this the default.
661 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
662 Bugzilla 1246, report and most of solution from Tomasz Kusy.
664 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
665 This may cause build issues on older platforms.
667 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
668 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
669 gnutls_require_mac & gnutls_require_protocols (no longer supported).
670 Added SNI support via GnuTLS too.
671 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
673 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
675 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
676 Applied second patch from Janne, implementing suggestion to default
677 multiple-strings-in-record handling to match SPF spec.
679 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
681 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
682 read-only, out of scope).
683 Patch from Wolfgang Breyha, report from Stuart Northfield.
685 PP/29 Fix three issues highlighted by clang analyser static analysis.
686 Only crash-plausible issue would require the Cambridge-specific
687 iplookup router and a misconfiguration.
688 Report from Marcin Mirosław.
690 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
692 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
693 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
694 As part of this, removing so much warning spew let me fix some minor
695 real issues in debug logging.
697 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
698 assignment on my part. Fixed.
700 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
701 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
702 Janne Snabb (who went above and beyond: thank you).
704 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
705 string otherwise requires a connection and a bunch more work and it's
706 relatively easy to get wrong. Should also expose TLS library linkage
709 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
710 64-bit ${eval} (JH/03).
712 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
713 GNU libc to support some of the 64-bit stuff, should not lead to
714 conflicts. Defined before os.h is pulled in, so if a given platform
715 needs to override this, it can.
717 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
718 protection layer was required, which is not implemented.
719 Bugzilla 1254, patch from Wolfgang Breyha.
721 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
722 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
723 tls_dhparam take prime identifiers. Also unbreak combination of
724 OpenSSL+DH_params+TLSSNI.
726 PP/39 Disable SSLv2 by default in OpenSSL support.
732 PP/01 Solaris build fix for Oracle's LDAP libraries.
733 Bugzilla 1109, patch from Stephen Usher.
735 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
737 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
740 TF/02 Fix a couple more cases where we did not log the error message
741 when unlink() failed. See also change 4.74-TF/03.
743 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
744 lock up or crash if it happened to be inside a call to libc when it
745 got a SIGUSR1 from exiwhat.
747 The SIGUSR1 handler appends the current process status to the process
748 log which is later printed by exiwhat. It used to use the general
749 purpose logging code to do this, but several functions it calls are
750 not safe for signals.
752 The new output code in the SIGUSR1 handler is specific to the process
753 log, and simple enough that it's easy to inspect for signal safety.
754 Removing some special cases also simplifies the general logging code.
755 Removing the spurious timestamps from the process log simplifies
758 TF/04 Improved ratelimit ACL condition.
760 The /noupdate option has been deprecated in favour of /readonly which
761 has clearer semantics. The /leaky, /strict, and /readonly update modes
762 are mutually exclusive. The update mode is no longer included in the
763 database key; it just determines when the database is updated. (This
764 means that when you upgrde Exim will forget old rate measurements.)
766 Exim now checks that the per_* options are used with an update mode that
767 makes sense for the current ACL. For example, when Exim is processing a
768 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
769 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
770 must specify per_mail/readonly. If you omit the update mode it defaults to
771 /leaky where that makes sense (as before) or /readonly where required.
773 The /noupdate option is now undocumented but still supported for
774 backwards compatibility. It is equivalent to /readonly except that in
775 ACLs where /readonly is required you may specify /leaky/noupdate or
776 /strict/noupdate which are treated the same as /readonly.
778 A useful new feature is the /count= option. This is a generalization
779 of the per_byte option, so that you can measure the throughput of other
780 aggregate values. For example, the per_byte option is now equivalent
781 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
783 The per_rcpt option has been generalized using the /count= mechanism
784 (though it's more complicated than the per_byte equivalence). When it is
785 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
786 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
787 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
788 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
789 Note that using per_rcpt with a non-readonly update mode in more than
790 one ACL will cause the recipients to be double-counted. (The per_mail
791 and per_byte options don't have this problem.)
793 The handling of very low rates has changed slightly. If the computed rate
794 is less than the event's count (usually one) then this event is the first
795 after a long gap. In this case the rate is set to the same as this event's
796 count, so that the first message of a spam run is counted properly.
798 The major new feature is a mechanism for counting the rate of unique
799 events. The new per_addr option counts the number of different
800 recipients that someone has sent messages to in the last time period. It
801 behaves like per_rcpt if all the recipient addresses are different, but
802 duplicate recipient addresses do not increase the measured rate. Like
803 the /count= option this is a general mechanism, so the per_addr option
804 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
805 example, measure the rate that a client uses different sender addresses
806 with the options per_mail/unique=$sender_address. There are further
807 details in the main documentation.
809 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
811 TF/06 Removed a few PCRE remnants.
813 TF/07 Automatically extract Exim's version number from tags in the git
814 repository when doing development or release builds.
816 PP/02 Raise smtp_cmd_buffer_size to 16kB.
817 Bugzilla 879. Patch from Paul Fisher.
819 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
820 Heavily based on revision 40f9a89a from Simon Arlott's tree.
823 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
825 PP/05 Variable $av_failed, true if the AV scanner deferred.
826 Bugzilla 1078. Patch from John Horne.
828 PP/06 Stop make process more reliably on build failure.
829 Bugzilla 1087. Patch from Heiko Schlittermann.
831 PP/07 Make maildir_use_size_file an _expandable_ boolean.
832 Bugzilla 1089. Patch from Heiko Schlittermann.
834 PP/08 Handle ${run} returning more data than OS pipe buffer size.
835 Bugzilla 1131. Patch from Holger Weiß.
837 PP/09 Handle IPv6 addresses with SPF.
838 Bugzilla 860. Patch from Wolfgang Breyha.
840 PP/10 GnuTLS: support TLS 1.2 & 1.1.
842 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
845 PP/11 match_* no longer expand right-hand-side by default.
846 New compile-time build option, EXPAND_LISTMATCH_RHS.
847 New expansion conditions, "inlist", "inlisti".
849 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
851 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
853 PP/14 fix log_write() format string regression from TF/03.
854 Bugzilla 1152. Patch from Dmitry Isaikin.
860 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
862 PP/02 Harmonised TLS library version reporting; only show if debugging.
863 Layout now matches that introduced for other libraries in 4.74 PP/03.
865 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
867 PP/04 New "dns_use_edns0" global option.
869 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
872 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
873 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
875 TK/01 Updated PolarSSL code to 0.14.2.
876 Bugzilla 1097. Patch from Andreas Metzler.
878 PP/07 Catch divide-by-zero in ${eval:...}.
881 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
884 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
885 format-string attack -- SECURITY: remote arbitrary code execution.
887 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
888 time unintentionally subject to list matching rules, letting the header
889 cause arbitrary Exim lookups (of items which can occur in lists, *not*
890 arbitrary string expansion). This allowed for information disclosure.
892 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
893 INT_MIN/-1 -- value coerced to INT_MAX.
899 NM/01 Workround for PCRE version dependency in version reporting
902 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
903 This fixes portability to compilers other than gcc, notably
904 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
906 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
907 makefiles for portability to HP-UX and POSIX correctness.
909 PP/01 Permit LOOKUP_foo enabling on the make command-line.
910 Also via indented variable definition in the Makefile.
911 (Debugging by Oliver Heesakkers).
913 PP/02 Restore caching of spamd results with expanded spamd_address.
914 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
916 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
917 Improves build reliability. Fix from: Frank Elsner
919 NM/02 Fix wide character breakage in the rfc2047 coding
920 Fixes bug 1064. Patch from Andrey N. Oktyabrski
922 NM/03 Allow underscore in dnslist lookups
923 Fixes bug 1026. Patch from Graeme Fowler
925 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
926 Code patches from Adam Ciarcinski of NetBSD.
928 NM/04 Fixed exiqgrep to cope with mailq missing size issue
931 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
932 is logged, to avoid truncation. Patch from John Horne.
934 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
935 Patch from Jakob Hirsch.
937 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
938 SQL string expansion failure details.
939 Patch from Andrey Oktyabrski.
941 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
942 Patch from Simon Arlott.
944 PP/09 New lookups functionality failed to compile on old gcc which rejects
945 extern declarations in function scope.
946 Patch from Oliver Fleischmann
948 PP/10 Use sig_atomic_t for flags set from signal handlers.
949 Check getgroups() return and improve debugging.
950 Fixed developed for diagnosis in bug 927 (which turned out to be
953 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
954 Patch from Mark Zealey.
956 PP/12 Bugzilla 1056: Improved spamd server selection.
957 Patch from Mark Zealey.
959 PP/13 Bugzilla 1086: Deal with maildir quota file races.
960 Based on patch from Heiko Schlittermann.
962 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
963 Patch from Uwe Doering, sign-off by Michael Haardt.
965 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
966 variable declaration deep within a block. Bug and patch from
969 PP/15 lookups-Makefile IRIX compatibilty coercion.
971 PP/16 Make DISABLE_DKIM build knob functional.
973 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
974 Patch by Simon Arlott
976 TF/03 Fix valgrind.h portability to C89 compilers that do not support
977 variable argument macros. Our copy now differs from upstream.
983 TF/01 Failure to get a lock on a hints database can have serious
984 consequences so log it to the panic log.
986 TF/02 Log LMTP confirmation messages in the same way as SMTP,
987 controlled using the smtp_confirmation log selector.
989 TF/03 Include the error message when we fail to unlink a spool file.
991 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
992 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
993 for maintaining out-of-tree patches for some time.
995 PP/01 Bugzilla 139: Documentation and portability issues.
996 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
997 Handle per-OS dynamic-module compilation flags.
999 PP/02 Let /dev/null have normal permissions.
1000 The 4.73 fixes were a little too stringent and complained about the
1001 permissions on /dev/null. Exempt it from some checks.
1002 Reported by Andreas M. Kirchwitz.
1004 PP/03 Report version information for many libraries, including
1005 Exim version information for dynamically loaded libraries. Created
1006 version.h, now support a version extension string for distributors
1007 who patch heavily. Dynamic module ABI change.
1009 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1010 privilege escalation vulnerability whereby the Exim run-time user
1011 can cause root to append content of the attacker's choosing to
1014 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1017 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1018 If dropping privileges for untrusted macros, we disabled normal logging
1019 on the basis that it would fail; for the Exim run-time user, this is not
1020 the case, and it resulted in successful deliveries going unlogged.
1021 Fixed. Reported by Andreas Metzler.
1027 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1028 only prepend for the Resent-* case. Fixes regression introduced in
1029 Exim 4.70 by NM/22 for Bugzilla 607.
1031 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1032 increasing numbers of administrators be bitten by this.
1034 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1036 PP/03 Bugzilla 994: added openssl_options main configuration option.
1038 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1040 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1042 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1044 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1045 without a peer certificate, leading to a segfault because of an
1046 assumption that peers always have certificates. Be a little more
1047 paranoid. Problem reported by Martin Tscholak.
1049 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1050 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1051 NB: ClamAV planning to remove STREAM in "middle of 2010".
1052 CL also introduces -bmalware, various -d+acl logging additions and
1053 more caution in buffer sizes.
1055 PP/09 Implemented reverse_ip expansion operator.
1057 PP/10 Bugzilla 937: provide a "debug" ACL control.
1059 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1061 PP/12 Bugzilla 973: Implement --version.
1063 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1065 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1067 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1069 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1070 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1071 ignore trailing whitespace.
1073 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1075 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1078 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1079 Notification from Dr Andrew Aitchison.
1081 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1082 ExtendedDetectionInfo response format.
1083 Notification from John Horne.
1085 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1088 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1089 XSL and documented dependency on system catalogs, with examples of how
1092 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1095 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1096 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1097 configuration file which is writeable by the Exim user or group.
1099 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1100 of configuration files to cover files specified with the -C option if
1101 they are going to be used with root privileges, not just the default
1104 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1105 option (effectively making it always true).
1107 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1108 files to be used while preserving root privileges.
1110 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1111 that rogue child processes cannot use them.
1113 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1114 run-time user, instead of root.
1116 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1117 Exim run-time user without dropping privileges.
1119 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1120 result string, instead of calling string_vformat() twice with the same
1123 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1124 for other users. Others should always drop root privileges if they use
1125 -C on the command line, even for a whitelisted configure file.
1127 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1129 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1135 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1136 $data_path, and $header_path variables; fixed documentation bugs and
1139 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1140 exipick to access non-standard spools, including the "frozen" queue
1143 NM/01 Bugzilla 965: Support mysql stored procedures.
1144 Patch from Alain Williams
1146 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1148 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1149 Patch from Andreas Metzler
1151 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1152 Patch from Kirill Miazine
1154 NM/05 Bugzilla 671: Added umask to procmail example.
1156 JJ/03 installed exipick 20100323.0, fixing doc bug
1158 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1159 directory. Notification and patch from Dan Rosenberg.
1161 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1163 TK/02 Improve log output when DKIM signing operation fails.
1165 MH/01 Treat the transport option dkim_domain as a colon separated
1166 list, not as a single string, and sign the message with each element,
1167 omitting multiple occurences of the same signer.
1169 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1170 Bugzilla 985, 986. Patch by Simon Arlott
1172 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1173 Patch by Simon Arlott
1175 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1176 MBX locking. Notification from Dan Rosenberg.
1182 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1184 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1186 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1188 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1190 NM/04 Bugzilla 915: Flag broken perl installation during build.
1196 TK/01 Added patch by Johannes Berg that expands the main option
1197 "spamd_address" if it starts with a dollar sign.
1199 TK/02 Write list of recipients to X-Envelope-Sender header when building
1200 the mbox-format spool file for content scanning (suggested by Jakob
1203 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1204 (http://www.dcc-servers.net/) support via dccifd. Activated by
1205 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1207 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1208 by Mark Daniel Reidel <mr@df.eu>.
1210 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1211 When building exim an external PCRE library is now needed -
1212 PCRE is a system library on the majority of modern systems.
1213 See entry on PCRE_LIBS in EDITME file.
1215 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1216 conversation. Added nologin parameter to request.
1217 Patch contributed by Kirill Miazine.
1219 TF/01 Do not log submission mode rewrites if they do not change the address.
1221 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1223 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1224 log files in place. Contributed by Roberto Lima.
1226 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1228 TF/03 Bugzilla 615: When checking the local_parts router precondition
1229 after a local_part_suffix or local_part_prefix option, Exim now
1230 does not use the address's named list lookup cache, since this
1231 contains cached lookups for the whole local part.
1233 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1234 Robert Millan. Documentation is in experimental-spec.txt.
1236 TF/04 Bugzilla 668: Fix parallel build (make -j).
1238 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1240 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1241 Patch provided by Jan Srzednicki.
1243 TF/05 Leading white space used to be stripped from $spam_report which
1244 wrecked the formatting. Now it is preserved.
1246 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1247 that they are available at delivery time.
1249 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1251 TF/08 TLS error reporting now respects the incoming_interface and
1252 incoming_port log selectors.
1254 TF/09 Produce a more useful error message if an SMTP transport's hosts
1255 setting expands to an empty string.
1257 NM/06 Bugzilla 744: EXPN did not work under TLS.
1258 Patch provided by Phil Pennock.
1260 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1261 Patch provided by Richard Godbee.
1263 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1264 acl_smtp_notquit, added index entry.
1266 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1267 Patch provided by Eugene Bujak.
1269 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1270 accept(). Patch provided by Maxim Dounin.
1272 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1273 Patch provided by Phil Pennock.
1275 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1277 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1278 Patch provided by Brad "anomie" Jorsch.
1280 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1281 Patch provided by Dean Brooks.
1283 TK/05 Add native DKIM support (does not depend on external libraries).
1285 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1286 Patch provided by Graeme Fowler.
1288 NM/16 Bugzilla 851: Documentation example syntax fix.
1290 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1292 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1295 NM/19 Bugzilla 745: TLS version reporting.
1296 Patch provided by Phil Pennock.
1298 NM/20 Bugzilla 167: bool: condition support.
1299 Patch provided by Phil Pennock.
1301 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1302 clients. Patch provided by Phil Pennock.
1304 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1305 Patch provided by Brad "anomie" Jorsch.
1307 NM/23 Bugzilla 687: Fix misparses in eximstats.
1308 Patch provided by Heiko Schlittermann.
1310 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1311 Patch provided by Heiko Schlittermann.
1313 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1314 plus update to original patch.
1316 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1318 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1319 Patch provided by David Brownlee.
1321 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1323 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1325 NM/30 Bugzilla 888: TLS documentation bugfixes.
1327 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1329 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1330 Unlike the original bugzilla I have changed all shell scripts in src tree.
1332 NM/33 Bugzilla 898: Transport filter timeout fix.
1333 Patch by Todd Rinaldo.
1335 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1336 Patch by Serge Demonchaux.
1338 NM/35 Bugzilla 39: Base64 decode bug fixes.
1339 Patch by Jakob Hirsch.
1341 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1343 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1345 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1347 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1353 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1354 ALT-N's libdkim that I have put here:
1355 http://duncanthrax.net/exim-experimental/
1357 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1358 were called 'true' and it seems that C99 defines that as a reserved
1359 keyword to be used with 'bool' variable types. That means you could
1360 not include C99-style headers which use bools without triggering
1361 build errors in sieve.c.
1363 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1364 as mailq or other aliases. Changed the --help handling significantly
1365 to do whats expected. exim_usage() emits usage/help information.
1367 SC/01 Added the -bylocaldomain option to eximstats.
1369 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1371 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1373 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1379 PH/01 Another patch from the Sieve maintainer.
1381 PH/02 When an IPv6 address is converted to a string for single-key lookup
1382 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1383 dots are used instead of colons so that keys in lsearch files need not
1384 contain colons. This was done some time before quoting was made available
1385 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1386 (notated using the quote facility) so as to distinguish them from IPv4
1387 keys. This meant that lookups for IP addresses in host lists did not work
1388 for iplsearch lookups.
1390 This has been fixed by arranging for IPv6 addresses to be expressed with
1391 colons if the lookup type is iplsearch. This is not incompatible, because
1392 previously such lookups could never work.
1394 The situation is now rather anomolous, since one *can* have colons in
1395 ordinary lsearch keys. However, making the change in all cases is
1396 incompatible and would probably break a number of configurations.
1398 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1401 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1402 conversion specification without a maximum field width, thereby enabling
1403 a rogue spamd server to cause a buffer overflow. While nobody in their
1404 right mind would setup Exim to query an untrusted spamd server, an
1405 attacker that gains access to a server running spamd could potentially
1406 exploit this vulnerability to run arbitrary code as the Exim user.
1408 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1409 $primary_hostname instead of what libspf2 thinks the hosts name is.
1411 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1412 a directory entry by the name of the lookup key. Previously, if a
1413 symlink pointed to a non-existing file or a file in a directory that
1414 Exim lacked permissions to read, a lookup for a key matching that
1415 symlink would fail. Now it is enough that a matching directory entry
1416 exists, symlink or not. (Bugzilla 503.)
1418 PH/03 The body_linecount and body_zerocount variables are now exported in the
1421 PH/04 Added the $dnslist_matched variable.
1423 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1424 This means they are set thereafter only if the connection becomes
1427 PH/06 Added the client_condition to authenticators so that some can be skipped
1428 by clients under certain conditions.
1430 PH/07 The error message for a badly-placed control=no_multiline_responses left
1431 "_responses" off the end of the name.
1433 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1435 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1436 (without spaces) instead of just copying the configuration text.
1438 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1440 PH/11 Added $max_received_linelength.
1442 PH/12 Added +ignore_defer and +include_defer to host lists.
1444 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1445 way in which PCRE > 7.0 is built.
1447 PH/14 Implemented queue_only_load_latch.
1449 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1450 MAIL command. The effect was to mangle the value on 64-bit systems.
1452 PH/16 Another patch from the Sieve maintainer.
1454 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1456 PH/18 If a system quota error occurred while trying to create the file for
1457 a maildir delivery, the message "Mailbox is full" was not appended to the
1458 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1459 only to a quota excession during the actual writing of the file.
1461 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1462 characters?) which causes problems in log lines. The DN values are now
1463 passed through string_printing() before being added to log lines.
1465 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1466 and InterBase are left for another time.)
1468 PH/21 Added message_body_newlines option.
1470 PH/22 Guard against possible overflow in moan_check_errorcopy().
1472 PH/23 POSIX allows open() to be a macro; guard against that.
1474 PH/24 If the recipient of an error message contained an @ in the local part
1475 (suitably quoted, of course), incorrect values were put in $domain and
1476 $local_part during the evaluation of errors_copy.
1482 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1483 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1486 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1487 issue a MAIL command.
1489 PH/02 In an ACL statement such as
1491 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1493 if a client was not listed at all, or was listed with a value other than
1494 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1495 the condition was not true (as it should be), so access was not denied.
1496 The bug was that the ! inversion was incorrectly passed on to the second
1497 item. This has been fixed.
1499 PH/03 Added additional dnslists conditions == and =& which are different from
1500 = and & when the dns lookup returns more than one IP address.
1502 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1503 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1505 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1506 FSYNC, which compiles an option called disable_fsync that allows for
1507 bypassing fsync(). The documentation is heavily laced with warnings.
1509 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1511 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1512 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1513 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1514 including adding "make clean"; (3) Added -fPIC when compiling the test
1515 dynamically loaded module, to get rid of a warning.
1517 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1518 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1519 = 0s. The bug is otherwise harmless.
1521 PH/07 There was a bug in the dovecot authenticator such that the value of
1522 $auth1 could be overwritten, and so not correctly preserved, after a
1523 successful authentication. This usually meant that the value preserved by
1524 the server_setid option was incorrect.
1526 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1528 PH/09 Installed PCRE release 7.0.
1530 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1531 run for batched SMTP input. It is now run at the start of every message
1532 in the batch. While fixing this I discovered that the process information
1533 (output by running exiwhat) was not always getting set for -bs and -bS
1534 input. This is fixed, and it now also says "batched" for BSMTP.
1536 PH/11 Added control=no_pipelining.
1538 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1539 patch, slightly modified), and move the expansion of helo_data till after
1540 the connection is made in the smtp transport (so it can use these
1543 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1545 PH/14 Added log_selector = +pid.
1547 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1549 PH/16 Add ${if forany and ${if forall.
1551 PH/17 Added dsn_from option to vary the From: line in DSNs.
1553 PH/18 Flush SMTP output before performing a callout, unless control =
1554 no_callout_flush is set.
1556 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1557 was true (the default) a successful delivery failed to delete the retry
1558 item, thus causing premature timeout of the address. The bug is now
1561 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1563 PH/21 Long custom messages for fakedefer and fakereject are now split up
1564 into multiline reponses in the same way that messages for "deny" and
1565 other ACL rejections are.
1567 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1568 with slight modification.
1570 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1571 draft, changing the syntax and factoring some duplicate code".
1573 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1574 for deliveries of the second and subsequent messages over the same SMTP
1577 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1578 ${reduce, with only minor "tidies".
1580 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1582 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1583 expansion side effects.
1585 PH/27 When a message times out after an over-quota error from an Exim-imposed
1586 quota, the bounce message says "mailbox is full". This message was not
1587 being given when it was a system quota that was exceeded. It now should
1590 MH/03 Made $recipients available in local_scan(). local_scan() already has
1591 better access to the recipient list through recipients_list[], but
1592 $recipients can be useful in postmaster-provided expansion strings.
1594 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1595 in the case of a MAIL command with additional options following the
1596 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1597 were accidentally chopped off.
1599 PH/29 SMTP synchronization checks are implemented when a command is read -
1600 there is a check that no more input is waiting when there shouldn't be
1601 any. However, for some commands, a delay in an ACL can mean that it is
1602 some time before the response is written. In this time, more input might
1603 arrive, invalidly. So now there are extra checks after an ACL has run for
1604 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1605 pipelining has not been advertised.
1607 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1609 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1610 returned in the SMTP response when smtp_return_error_details was false.
1611 This has been fixed.
1613 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1614 instead of the C I/O that was originally supplied, because problems were
1615 reported on Solaris.
1617 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1618 Exim which did not show up earlier: it was assuming that a call to
1619 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1620 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1621 was a macro that became an assignment, so it seemed to work. This has
1622 changed to a proper function call with a void return, hence the compile
1623 error. Exim's code has been fixed.
1625 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1628 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1630 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1632 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1633 because it turns out to be too big or there is a timeout) there is no
1634 "Completed" line in the log. When some messages of this type were
1635 selected by exigrep, they were listed as "not completed". Others were
1636 picked up by some special patterns. I have improved the selection
1637 criteria to be more general.
1639 PH/38 The host_find_failed option in the manualroute router can now be set
1640 to "ignore", to completely ignore a host whose IP address cannot be
1641 found. If all hosts are ignored, the behaviour is controlled by the new
1642 host_all_ignored option.
1644 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1645 homing or because of multiple MX records with /mx) generated more than
1646 one IP address, and the following item turned out to be the local host,
1647 all the secondary addresses of the first item were incorrectly removed
1648 from the list, along with the local host and any following hosts (which
1649 is what is supposed to happen).
1651 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1652 whoever called Exim into the -H file. In the case of the daemon it was
1653 behaving confusingly. When first started, it used values for whoever
1654 started the daemon, but after a SIGHUP it used the Exim user (because it
1655 calls itself on a restart). I have changed the code so that it now always
1658 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1659 message are rejected with the same error (e.g. no authentication or bad
1660 sender address), and a DATA command is nevertheless sent (as can happen
1661 with PIPELINING or a stupid MUA), the error message that was given to the
1662 RCPT commands is included in the rejection of the DATA command. This is
1663 intended to be helpful for MUAs that show only the final error to their
1666 PH/42 Another patch from the Sieve maintainer.
1668 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1669 Eximstats - Fixed some broken HTML links and added missing column headers
1671 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1672 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1674 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1676 PH/43 Yet another patch from the Sieve maintainer.
1678 PH/44 I found a way to check for a TCP/IP connection going away before sending
1679 the response to the final '.' that terminates a message, but only in the
1680 case where the client has not sent further data following the '.'
1681 (unfortunately, this is allowed). However, in many cases there won't be
1682 any further data because there won't be any more messages to send. A call
1683 to select() can be used: if it shows that the input is "ready", there is
1684 either input waiting, or the socket has been closed. An attempt to read
1685 the next input character can distinguish the two cases. Previously, Exim
1686 would have sent an OK response which the client would never have see.
1687 This could lead to message repetition. This fix should cure that, at
1688 least in a lot of common cases.
1690 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1691 advertised in response to EHLO.
1697 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1698 fixed by 4.65/MH/01 (is this a record?) are fixed:
1700 (i) An empty string was always treated as zero by the numeric comparison
1701 operators. This behaviour has been restored.
1703 (ii) It is documented that the numeric comparison operators always treat
1704 their arguments as decimal numbers. This was broken in that numbers
1705 starting with 0 were being interpreted as octal.
1707 While fixing these problems I realized that there was another issue that
1708 hadn't been noticed. Values of message_size_limit (both the global option
1709 and the transport option) were treated as octal if they started with 0.
1710 The documentation was vague. These values are now always treated as
1711 decimal, and I will make that clear in the documentation.
1717 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1718 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1721 MH/01 Don't check that the operands of numeric comparison operators are
1722 integers when their expansion is in "skipping" mode (fixes bug
1723 introduced by 4.64-PH/07).
1725 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1726 child addresses, Exim now panics and dies. Previously, because the count
1727 is held in a short int, deliveries were likely to be lost. As such a
1728 large number of recipients for a single message is ridiculous
1729 (performance will be very, very poor), I have chosen to impose a limit
1730 rather than extend the field.
1736 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1737 leftover -K file (the existence of which was triggered by #402).
1738 While we were at it, introduced process PID as part of the -K
1739 filename. This should rule out race conditions when creating
1742 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1743 processing considerably. Previous code took too long for large mails,
1744 triggering a timeout which in turn triggers #401.
1746 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1747 in the DK code in transports.c. sendfile() is not really portable,
1748 hence the _LINUX specificness.
1750 TF/01 In the add_headers option to the mail command in an Exim filter,
1751 there was a bug that Exim would claim a syntax error in any
1752 header after the first one which had an odd number of characters
1755 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1756 callout verification, Exim cached a "reject" for the entire domain. This
1757 is correct for most verifications, but it is not correct for a recipient
1758 verification with use_sender or use_postmaster set, because in that case
1759 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1760 case of MAIL FROM:<> rejection from other early rejections (e.g.
1761 rejection of HELO). When verifying a recipient using a non-null MAIL
1762 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1763 Whatever the result of the callout, the value of the domain cache is
1764 left unchanged (for any other kind of callout, getting as far as trying
1765 RCPT means that the domain itself is ok).
1767 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1770 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1771 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1772 session, the daemon ignores ECONNECT errors and logs others; it now
1773 ignores EPIPE as well.
1775 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1776 (quoted-printable decoding).
1778 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1779 later the small subsequent patch to fix an introduced bug.
1781 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1783 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1785 PH/08 An error is now given if message_size_limit is specified negative.
1787 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1788 to be given (somewhat) arbitrary names.
1790 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1793 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1794 miscellaneous code fixes
1796 PH/10 Added the log_reject_target ACL modifier to specify where to log
1799 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1800 hostname. This is wrong, because it relates to the incoming message (and
1801 probably the interface on which it is arriving) and not to the outgoing
1802 callout (which could be using a different interface). This has been
1803 changed to use the value of the helo_data option from the smtp transport
1804 instead - this is what is used when a message is actually being sent. If
1805 there is no remote transport (possible with a router that sets up host
1806 addresses), $smtp_active_hostname is used.
1808 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1809 tweaks were necessary in order to get it to work (see also 21 below):
1810 (a) The code assumed that strncpy() returns a negative number on buffer
1811 overflow, which isn't the case. Replaced with Exim's string_format()
1813 (b) There were several signed/unsigned issues. I just did the minimum
1814 hacking in of casts. There is scope for a larger refactoring.
1815 (c) The code used strcasecmp() which is not a standard C function.
1816 Replaced with Exim's strcmpic() function.
1817 (d) The code set only $1; it now sets $auth1 as well.
1818 (e) A simple test gave the error "authentication client didn't specify
1819 service in request". It would seem that Dovecot has changed its
1820 interface. Fortunately there's a specification; I followed it and
1821 changed what the client sends and it appears to be working now.
1823 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1826 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1827 address A is aliased to B and C, where B exists and C does not. Without
1828 -v the output is "A verified" because verification stops after a
1829 successful redirection if more than one address is generated. However,
1830 with -v the child addresses are also verified. Exim was outputting "A
1831 failed to verify" and then showing the successful verification for C,
1832 with its parentage. It now outputs "B failed to verify", showing B's
1833 parentage before showing the successful verification of C.
1835 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1836 look up a TXT record in a specific list after matching in a combined
1839 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1840 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1841 they consult the DNS. I had assumed they would set it the way they
1842 wanted; and indeed my experiments on Linux seem to show that in some
1843 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1844 To be on the safe side, however, I have now made the interface to
1845 host_find_byname() similar to host_find_bydns(), with an argument
1846 containing the DNS resolver options. The host_find_byname() function now
1847 sets these options at its start, just as host_find_bydns() does. The smtp
1848 transport options dns_qualify_single and dns_search_parents are passed to
1849 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1850 of host_find_byname() use the default settings of RES_DEFNAMES
1851 (qualify_single) but not RES_DNSRCH (search_parents).
1853 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1854 spool_read_header() do less string testing, by means of a preliminary
1855 switch on the second character of optional "-foo" lines. (This is
1856 overdue, caused by the large number of possibilities that now exist.
1857 Originally there were few.) While I was there, I also converted the
1858 str(n)cmp tests so they don't re-test the leading "-" and the first
1859 character, in the hope this might squeeze out yet more improvement.
1861 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1862 flag allowing group syntax was set by the header_syntax check but not
1863 turned off, possible causing trouble later; (2) The flag was not being
1864 set at all for the header_verify test, causing "group"-style headers to
1865 be rejected. I have now set it in this case, and also caused header_
1866 verify to ignore an empty address taken from a group. While doing this, I
1867 came across some other cases where the code for allowing group syntax
1868 while scanning a header line wasn't quite right (mostly, not resetting
1869 the flag correctly in the right place). These bugs could have caused
1870 trouble for malformed header lines. I hope it is now all correct.
1872 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1873 with the "reply" argument non-NULL. The code, however (which originally
1874 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1875 but it didn't always do it. This confused somebody who was copying the
1876 code for some other use. I have removed all the tests.
1878 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1879 feature that was used to support insecure browsers during the U.S. crypto
1880 embargo. It requires special client support, and Exim is probably the
1881 only MTA that supported it -- and would never use it because real RSA is
1882 always available. This code has been removed, because it had the bad
1883 effect of slowing Exim down by computing (never used) parameters for the
1884 RSA_EXPORT functionality.
1886 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1887 authenticator to fail if there's a tab character in the incoming data
1888 (there should never be unless someone is messing about, as it's supposed
1889 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1890 if the connection is using TLS or if the remote IP is the same as the
1891 local IP, and the "valid-client-cert option" if a client certificate has
1894 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1895 authenticators. This can be used for authorization after authentication
1896 succeeds. (In the case of plaintext, it servers for both authentication
1899 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1900 if any retry times were supplied.
1902 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1903 connection, where there is no client IP address to check. In this
1904 situation, the verify now always succeeds.
1906 PH/25 Applied John Jetmore's -Mset patch.
1908 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1910 PH/27 In a string expansion for a processed (not raw) header when multiple
1911 headers of the same name were present, leading whitespace was being
1912 removed from all of them, but trailing whitespace was being removed only
1913 from the last one. Now trailing whitespace is removed from each header
1914 before concatenation. Completely empty headers in a concatenation (as
1915 before) are ignored.
1917 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1918 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1920 PH/29 [Removed. This was a change that I later backed out, and forgot to
1921 correct the ChangeLog entry (that I had efficiently created) before
1922 committing the later change.]
1924 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1925 address errors (4xx response to RCPT) over the same connection as other
1926 messages routed to the same hosts. Such deliveries are always "forced",
1927 so retry times are not inspected. This resulted in far too many retries
1928 for the affected addresses. The effect occurred only when there were more
1929 hosts than the hosts_max_try setting in the smtp transport when it had
1930 the 4xx errors. Those hosts that it had tried were not added to the list
1931 of hosts for which the message was waiting, so if all were tried, there
1932 was no problem. Two fixes have been applied:
1934 (i) If there are any address or message errors in an SMTP delivery, none
1935 of the hosts (tried or untried) are now added to the list of hosts
1936 for which the message is waiting, so the message should not be a
1937 candidate for sending over the same connection that was used for a
1938 successful delivery of some other message. This seems entirely
1939 reasonable: after all the message is NOT "waiting for some host".
1940 This is so "obvious" that I'm not sure why it wasn't done
1941 previously. Hope I haven't missed anything, but it can't do any
1942 harm, as the worst effect is to miss an optimization.
1944 (ii) If, despite (i), such a delivery is accidentally attempted, the
1945 routing retry time is respected, so at least it doesn't keep
1946 hammering the server.
1948 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1949 in ${readsocket because some servers need this prod.
1951 PH/32 Added some extra debug output when updating a wait-xxx database.
1953 PH/33 The hint "could be header name not terminated by colon", which has been
1954 given for certain expansion errors for a long time, was not being given
1955 for the ${if def:h_colon_omitted{... case.
1957 PH/34 The spec says: "With one important exception, whenever a domain list is
1958 being scanned, $domain contains the subject domain." There was at least
1959 one case where this was not true.
1961 PH/35 The error "getsockname() failed: connection reset by peer" was being
1962 written to the panic log as well as the main log, but it isn't really
1963 panic-worthy as it just means the connection died rather early on. I have
1964 removed the panic log writing for the ECONNRESET error when getsockname()
1967 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1968 runs only) independently of the message's sender address. This meant
1969 that, if the 4xx error was in fact related to the sender, a different
1970 message to the same recipient with a different sender could confuse
1971 things. In particualar, this can happen when sending to a greylisting
1972 server, but other circumstances could also provoke similar problems.
1973 I have changed the default so that the retry time for these errors is now
1974 based a combination of the sender and recipient addresses. This change
1975 can be overridden by setting address_retry_include_sender=false in the
1978 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1979 remote server are returned as part of bounce messages. This was not
1980 happening for LMTP over a pipe (the lmtp transport), but now it is the
1981 same for both kinds of LMTP.
1983 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1984 in header lines that were in fact CNAMEs. This is no longer the case.
1986 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1987 and queue runs started by the daemon processed all messages. This has
1988 been fixed so that -R and -S can now usefully be given with -q<time>.
1990 PH/40 Import PCRE release 6.7 (fixes some bugs).
1992 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1994 PH/42 Give an error if -q is specified more than once.
1996 PH/43 Renamed the variables $interface_address and $interface_port as
1997 $received_ip_address and $received_port, to make it clear that these
1998 values apply to message reception, and not to the outgoing interface when
1999 a message is delivered. (The old names remain recognized, of course.)
2001 PH/44 There was no timeout on the connect() call when using a Unix domain
2002 socket in the ${readsocket expansion. There now is.
2004 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2005 be meaningful with "accept".
2007 SC/01 Eximstats V1.43
2008 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2010 SC/02 Eximstats V1.44
2011 Use a glob alias rather than an array ref in the generated
2012 parser. This improves both readability and performance.
2014 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2015 Collect SpamAssassin and rejection statistics.
2016 Don't display local sender or destination tables unless
2017 there is data to show.
2018 Added average volumes into the top table text output.
2020 SC/04 Eximstats V1.46
2021 Collect data on the number of addresses (recipients)
2022 as well as the number of messages.
2024 SC/05 Eximstats V1.47
2025 Added 'Message too big' to the list of mail rejection
2026 reasons (thanks to Marco Gaiarin).
2028 SC/06 Eximstats V1.48
2029 Mainlog lines which have GMT offsets and are too short to
2030 have a flag are now skipped.
2032 SC/07 Eximstats V1.49 (Alain Williams)
2033 Added the -emptyok flag.
2035 SC/08 Eximstats V1.50
2036 Fixes for obtaining the IP address from reject messages.
2038 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2039 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2040 whitesspace changes from 4.64-PH/27
2042 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2045 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2046 are found, allow negative numbers in numeric criteria)
2048 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2050 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2051 to match changes made in 4.64-PH/43
2053 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2055 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2056 "domain" is actually an IP address, and force a failure. This locks out
2057 those revolvers/nameservers that support "A-for-A" lookups, in
2058 contravention of the specifications.
2060 PH/48 When a host name was looked up from an IP address, and the subsequent
2061 forward lookup of the name timed out, the host name was left in
2062 $sender_host_name, contrary to the specification.
2064 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2065 restricted to single-key lookups, Exim was not diagnosing an error if
2066 * or *@ was used with a query-style lookup.
2068 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2070 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2071 long ago, but noone interested enough thought of it. Let's just say that
2072 the "1.1" means that there are some new functions that weren't there at
2073 some point in the past.
2075 PH/51 Error processing for expansion failure of helo_data from an smtp
2076 transport during callout processing was broken.
2078 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2079 tested/used via the -bh/-bhc/-bs options.
2081 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2082 bug, fixed in subsequent PCRE releases).
2084 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2085 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2087 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2093 SC/01 Use a glob alias rather than an array ref in eximstats generated
2094 parser. This improves both readability and performance.
2096 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2097 Don't display local sender or destination tables in eximstats unless
2098 there is data to show.
2099 Added average volumes into the eximstats top table text output.
2101 SC/03 Collect data on the number of addresses (recipients) as well
2102 as the number of messages in eximstats.
2104 TF/01 Correct an error in the documentation for the redirect router. Exim
2105 does (usually) call initgroups() when daemonizing.
2107 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2108 with consistent privilege compared to when running as a daemon.
2110 TF/03 Note in the spec that $authenticated_id is not set for local
2111 submissions from trusted users.
2113 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2114 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2116 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2117 by adding some example configuration directives to the default
2118 configuration file. A little bit of work is required to uncomment the
2119 directives and define how usernames and passwords are checked, but
2120 there is now a framework to start from.
2122 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2123 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2124 without this. I don't know how relevant this is to other LDAP libraries.
2126 PH/02 Add the verb name to the "unknown ACL verb" error.
2128 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2130 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2132 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2133 directory not expanded when it should be if an expanded home directory
2134 was set for the address (which is overridden by the transport).
2136 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2139 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2140 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2141 because it is too late at that time, and has no effect.
2143 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2144 security issue with \' (bugzilla #107). I could not use the
2145 PQescapeStringConn() function, because it needs a PGconn value as one of
2148 PH/08 When testing addresses using -bt, indicate those final addresses that
2149 are duplicates that would not cause an additional delivery. At least one
2150 person was confused, thinking that -bt output corresponded to deliveries.
2151 (Suppressing duplicates isn't a good idea as you lose the information
2152 about possibly different redirections that led to the duplicates.)
2154 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2155 systems where poll() doesn't work, in particular OS X.
2157 PH/10 Added more information to debugging output for retry time not reached.
2159 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2160 operations in malware.c.
2162 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2165 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2166 syslog_duplication set false, log lines that would normally be written
2167 both the the main log and to the reject log were not written to syslog at
2170 PH/14 In the default configuration, change the use of "message" in ACL warn
2171 statements to "add_header".
2173 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2174 not followed by a command (e.g. "seen endif").
2176 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2177 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2180 PH/17 Added extra conditions to the default value of delay_warning_condition
2184 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2185 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2186 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2189 The Auto-Submitted: and various List- headers are standardised, whereas I
2190 don't think Precedence: ever was.
2192 PH/18 Refactored debugging code in route_finduser() to show more information,
2193 in particular, the error code if getpwnam() issues one.
2195 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2196 This is apparently needed in addition to the PH/07 change above to avoid
2197 any possible encoding problems.
2199 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2200 but not after initializing Perl.
2202 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2203 output them only if debugging. By default they are written stderr,
2204 apparently, which is not desirable.
2206 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2209 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2212 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2214 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2215 authenticated or an ident call has been made. Suppress the default
2216 values for $authenticated_id and $authenticated_sender (but permit -oMai
2217 and -oMas) when testing with -bh.
2219 PH/24 Re-jigged the order of the tests in the default configuration so that the
2220 tests for valid domains and recipients precede the DNS black list and CSA
2221 tests, on the grounds that those ones are more expensive.
2223 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2224 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2225 This bug exists in every version of Exim that I still have, right back to
2228 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2229 However, an attempt to turn on case-sensitivity in a regex key by
2230 including (?-i) didn't work because the subject string was already
2231 lowercased, and the effects were non-intuitive. It turns out that a
2232 one-line patch can be used to allow (?-i) to work as expected.
2238 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2239 other effects) broke the use of negated acl sub-conditions.
2241 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2244 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2245 "Deny" causes Exim to reject the incoming connection with a 554 error.
2246 Unfortunately, if there is a major crisis, such as a disk failure,
2247 tcp-wrappers gives "deny", whereas what one would like would be some
2248 kind of temporary error. A kludge has been added to help with this.
2249 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2250 554 error is used if errno is still zero or contains ENOENT (which occurs
2251 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2254 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2256 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2257 errors. Otherwise a message that provokes a temporary error (when other
2258 messages do not) can cause a whole host to time out.
2260 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2261 addresses were routed directly to files or pipes from a redirect router.
2262 File deliveries just didn't batch; pipe deliveries might have suffered
2265 PH/06 A failure to get a lock for a hints database would erroneously always say
2266 "Failed to get write lock", even when it was really a read lock.
2268 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2269 of 0600. This has been changed to use the value of the lockfile_mode
2270 option (which defaults to 0600).
2272 PH/08 Applied small patch from the Sieve maintainer.
2274 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2275 folder from quota calculations, a direct delivery into this folder messed
2276 up the contents of the maildirsize file. This was because the regex was
2277 used only to exclude .Trash (or whatever) when the size of the mailbox
2278 was calculated. There was no check that a delivery was happening into an
2279 excluded directory. This bug has been fixed by ignoring all quota
2280 processing for deliveries into excluded directories.
2282 PH/10 Added the maildirfolder_create_regex option to appendfile.
2288 PH/01 The code for finding all the local interface addresses on a FreeBSD
2289 system running IPv6 was broken. This may well have applied to all BSD
2290 systems, as well as to others that have similar system calls. The broken
2291 code found IPv4 interfaces correctly, but gave incorrect values for the
2292 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2293 that it would not match correctly against @[] and not recognize the IPv6
2296 PH/02 The ipliteral router was not recognizing addresses of the form user@
2297 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2299 PH/03 Added disable_ipv6.
2301 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2302 decoded form, because it is most often used to construct To: headers
2303 lines in autoreplies, and the decoded form may well be syntactically
2304 invalid. However, $reply_address has leading white space removed, and all
2305 newlines turned into spaces so that the autoreply transport does not
2308 PH/05 If group was specified without a user on a router, and no group or user
2309 was specified on a transport, the group from the router was ignored.
2311 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2312 for visible compile-time settings that can be used to change these
2313 numbers, for those that want even more. Backwards compatibility with old
2314 spool files has been maintained. However, going back to a previous Exim
2315 release will lost any variables that are in spool files.
2317 PH/07 Two small changes when running in the test harness: increase delay when
2318 passing a TCP/IP connection to a new process, in case the original
2319 process has to generate a bounce, and remove special handling of
2320 127.0.0.2 (sic), which is no longer necessary.
2322 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2323 be the same on different OS.
2325 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2328 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2329 whether --show-vars was specified or not
2331 JJ/02 exipick: Added support for new ACL variable spool format introduced
2334 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2335 syntactically invalid From: or Reply-to: line, and a filter used this to
2336 generate an autoreply, and therefore failed to obtain an address for the
2337 autoreply, Exim could try to deliver to a non-existent relative file
2338 name, causing unrelated and misleading errors. What now happens is that
2339 it logs this as a hard delivery error, but does not attempt to create a
2342 PH/11 The exinext utility has a -C option for testing purposes, but although
2343 the given file was scanned by exinext itself; it wasn't being passed on
2344 when Exim was called.
2346 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2347 an end-of-file indication when reading a command response.
2349 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2350 compiled. In many other places in Exim, IPv6 addresses are always
2351 recognized, so I have changed this. It also means that IPv4 domain
2352 literals of the form [IPV4:n.n.n.n] are now always recognized.
2354 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2355 used if the router is not running as root, for example, when verifying at
2356 ACL time, or when using -bh. The debugging output from this situation was
2357 non-existent - all you got was a failure to exec. I have made two
2360 (a) Failures to set uid/gid, the current directory, or a process leader
2361 in a subprocess such as that created by queryprogram now generate
2362 suitable debugging ouput when -d is set.
2364 (b) The queryprogram router detects when it is not running as root,
2365 outputs suitable debugging information if -d is set, and then runs
2366 the subprocess without attempting to change uid/gid.
2368 PH/15 Minor change to Makefile for building test_host (undocumented testing
2371 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2372 additional section of a DNS packet that returns MX or SRV records.
2373 Instead, it always explicitly searches for A/AAAA records. This avoids
2374 major problems that occur when a DNS server includes only records of one
2375 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2376 fixed another bug: if SRV records were looked up and the corresponding
2377 address records were *not* found in the additional section, the port
2378 values from the SRV records were lost.
2380 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2381 using the correct key (the original address) when searching the retry
2382 rules in order to find which one to use for generating the retry hint.
2384 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2385 adding the default one. Similarly, if it contains a Reply-To: header, the
2386 errors_reply_to option, if set, is not used.
2388 PH/19 When calculating a retry time, Exim used to measure the "time since
2389 failure" by looking at the "first failed" field in the retry record. Now
2390 it does not use this if it is later than than the arrival time of the
2391 message. Instead it uses the arrival time. This makes for better
2392 behaviour in cases where some deliveries succeed, thus re-setting the
2393 "first failed" field. An example is a quota failure for a huge message
2394 when small messages continue to be delivered. Without this change, the
2395 "time since failure" will always be short, possible causing more frequent
2396 delivery attempts for the huge message than are intended.
2397 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2399 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2400 $1, $2, $3) because the numerical variables can be reset during some
2401 expansion items (e.g. "match"), thereby losing the authentication data.
2403 PH/21 Make -bV show the size of off_t variables so that the test suite can
2404 decide whether to run tests for quotas > 2G.
2406 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2407 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2408 filecount value is greater than 2G or if a quota value is greater than 2G
2409 on a system where the size of off_t is not greater than 4, a panic error
2412 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2413 never match. The debug and -bh output now contains an explicit error
2414 message indicating a malformed IPv4 address or mask.
2416 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2417 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2418 PH/23 above applies.
2420 PH/25 Do not write to syslog when running in the test harness. The only
2421 occasion when this arises is a failure to open the main or panic logs
2422 (for which there is an explicit test).
2424 PH/26 Added the /no_tell option to "control=freeze".
2426 PH/27 If a host name lookup failed very early in a connection, for example, if
2427 the IP address matched host_lookup and the reverse lookup yielded a name
2428 that did not have a forward lookup, an error message of the form "no IP
2429 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2430 could be logged. Now it outputs the IP address instead of "NULL".
2432 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2433 allows the sender and the authenticated sender to be set when
2434 submitting a message from within Exim. Since child_open_exim() is
2435 documented for local_scan(), the new function should be too.
2437 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2438 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2439 results in an empty string is now treated as unset.
2441 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2443 PH/31 Added sender_verify_fail logging option.
2445 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2446 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2447 tidied the source and removed it altogether.
2449 PH/33 When a queue run was abandoned because the load average was too high, a
2450 log line was always written; now it is written only if the queue_run log
2451 selector is set. In addition, the log line for abandonment now contains
2452 information about the queue run such as the pid. This is always present
2453 in "start" and "stop" lines but was omitted from the "abandon" line.
2455 PH/34 Omit spaces between a header name and the colon in the error message that
2456 is given when verify = headers_syntax fails (if there are lots of them,
2457 the message gets confusing).
2459 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2460 names, as there are now some PTR records that contain slashes. This check
2461 is only to protect against broken name servers that fall over on strange
2462 characters, so the fact that it applies to all lookups doesn't matter.
2464 PH/36 Now that the new test suite is complete, we can remove some of the
2465 special code in Exim that was needed for the old test suite. For example,
2466 sorting DNS records because real resolvers return them in an arbitrary
2467 order. The new test suite's fake resolver always returns records in the
2470 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2471 bounces) except when queue_only is set, to avoid logging races between
2472 the different processes.
2474 PH/38 Panic-die if .include specifies a non-absolute path.
2476 PH/39 A tweak to the "H" retry rule from its user.
2478 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2479 a label. They prevented compilation on older perls.
2481 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2482 a warning to be raised on newish perls.
2484 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2485 on queue. Changes to match documented behaviour of showing count of
2486 messages matching specified criteria.
2488 PH/40 Changed the default ident timeout from 30s to 5s.
2490 PH/41 Added support for the use of login_cap features, on those BSD systems
2491 that have them, for controlling the resources used by pipe deliveries.
2493 PH/42 The content-scanning code uses fopen() to create files in which to put
2494 message data. Previously it was not paying any attention to the mode of
2495 the files. Exim runs with umask(0) because the rest of the code creates
2496 files with open(), and sets the required mode explicitly. Thus, these
2497 files were ending up world-writeable. This was not a big issue, because,
2498 being within the spool directory, they were not world-accessible. I have
2499 created a function called modefopen, which takes an additional mode
2500 argument. It sets umask(777), creates the file, chmods it to the required
2501 mode, then resets the umask. All the relevant calls to fopen() in the
2502 content scanning code have been changed to use this function.
2504 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2505 to 24 hours. This avoids potential overflow problems when processing G
2506 and H retry rules. I suspect nobody ever tinkers with this value.
2508 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2510 PH/45 When the plaintext authenticator is running as a client, the server's
2511 challenges are checked to ensure they are valid base64 strings. By
2512 default, the authentication attempt is cancelled if an invalid string is
2513 received. Setting client_ignore_invalid_base64 true ignores these errors.
2514 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2515 they are received. Thus, the responses can be made to depend on the
2516 challenges. If an invalid string is ignored, an empty string is placed in
2519 PH/46 Messages that are created by the autoreply transport now contains a
2520 References: header, in accordance with RFCs 2822 and 3834.
2522 PH/47 Added authenticated_sender_force to the smtp transport.
2524 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2526 PH/49 Installed latest patch from the Sieve maintainer.
2528 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2529 was also set, the appendfile transport was unnecessarily scanning a
2530 directory of message files (e.g. for maildir delivery) to find the count
2531 of files (along with the size), even though it did not need this
2532 information. It now does the scan only if it needs to find either the
2533 size of the count of files.
2535 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2537 PH/52 Two bugs concerned with error handling when the smtp transport is
2540 (i) Exim was not creating retry information for temporary errors given
2541 for individual recipients after the DATA command when the smtp transport
2542 was used in LMTP mode. This meant that they could be retried too
2543 frequently, and not timed out correctly.
2545 (ii) Exim was setting the flag that allows error details to be returned
2546 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2547 recipients that were returned after the DATA command.
2549 PH/53 This is related to PH/52, but is more general: for any failing address,
2550 when detailed error information was permitted to be returned to the
2551 sender, but the error was temporary, then after the final timeout, only
2552 "retry timeout exceeded" was returned. Now it returns the full error as
2553 well as "retry timeout exceeded".
2555 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2556 do this, and (what is worse) MTAs that accept it.
2558 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2559 will now be deprecated.
2561 PH/56 New os.c-cygwin from the Cygwin maintainer.
2563 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2564 formats (previously only available in exim formats via -bpr, -bpru,
2565 and -bpra. Now also available in native and exiqgrep formats)
2567 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2568 with very large, slow to parse queues
2570 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2572 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2574 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2575 responses to authentication challenges, though it was showing the
2576 challenges; (ii) I've removed the CR characters from the debug output for
2579 PH/58 Allow for the insertion of a newline as well as a space when a string
2580 is turned into more than one encoded-word during RFC 2047 encoding. The
2581 Sieve code now uses this.
2583 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2584 data_4xx, lost_connection, tls_required.
2586 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2587 message was being sent as an SMTP response.
2589 PH/61 Add -l and -k options to exicyclog.
2591 PH/62 When verifying, if an address was redirected to one new address, so that
2592 verification continued, and the new address failed or deferred after
2593 having set something in $address_data, the value of $address_data was not
2594 passed back to the ACL. This was different to the case when no
2595 redirection occurred. The value is now passed back in both cases.
2597 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2598 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2599 use login_cap.h, so on its own it isn't the distinguishing feature. The
2600 new name refers directly to the setclassresources() function.
2602 PH/65 Added configuration files for NetBSD3.
2604 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2606 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2607 is preferred over IPv4.
2609 PH/68 The bounce_return_message and bounce_return_body options were not being
2610 honoured for bounces generated during the reception of non-SMTP messages.
2611 In particular, this applied to messages rejected by the ACL. This bug has
2612 been fixed. However, if bounce_return_message is true and bounce_return_
2613 body is false, the headers that are returned for a non-SMTP message
2614 include only those that have been read before the error was detected.
2615 (In the case of an ACL rejection, they have all been read.)
2617 PH/69 The HTML version of the specification is now built in a directory called
2618 spec_html instead of spec.html, because the latter looks like a path with
2619 a MIME-type, and this confuses some software.
2621 PH/70 Catch two compiler warnings in sieve.c.
2623 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2624 function verify_get_ident() calls ip_connect() to connect a socket, but
2625 if the "connect()" function timed out, ip_connect() used to close the
2626 socket. However, verify_get_ident() also closes the socket later, and in
2627 between Exim writes to the log, which may get opened at this point. When
2628 the socket was closed in ip_connect(), the log could get the same file
2629 descriptor number as the socket. This naturally causes chaos. The fix is
2630 not to close the socket in ip_connect(); the socket should be closed by
2631 the function that creates it. There was only one place in the code where
2632 this was missing, in the iplookup router, which I don't think anybody now
2633 uses, but I've fixed it anyway.
2635 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2636 well as to direct DNS lookups. Otherwise the handling of names in host
2637 lists is inconsistent and therefore confusing.
2643 PH/01 Two changes to the default runtime configuration:
2645 (1) Move the checks for relay_from_hosts and authenticated clients from
2646 after to before the (commented out) DNS black list checks.
2648 (2) Add control=submission to the relay_from_hosts and authenticated
2649 clients checks, on the grounds that messages accepted by these
2650 statements are most likely to be submissions.
2652 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2654 (1) Generate an error if the third argument for the ${prvs expansion is
2657 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2660 (3) Reset the variables that are obtained from the first argument of
2661 ${prvscheck and used in the second argument before leaving the code,
2662 because their memory is reclaimed, so using them afterwards may do
2665 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2666 one (it's much easier than Tom thought :-).
2668 (5) Because of (4), we can now allow for the use of $prvscheck_result
2669 inside the third argument.
2671 PH/03 For some reason, the default setting of PATH when running a command from
2672 a pipe transport was just "/usr/bin". I have changed it to
2675 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2676 anything to be listed in the output from -bV.
2678 PH/05 When a filter generated an autoreply, the entire To: header line was
2679 quoted in the delivery log line, like this:
2681 => >A.N.Other <ano@some.domain> <original@ddress> ...
2683 This has been changed so that it extracts the operative address. There
2684 may be more than one such address. If so, they are comma-separated, like
2687 => >ano@some.domain,ona@other.domain <original@ddress> ...
2689 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2690 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2691 not being looked up in the rDNS to get a host name, Exim was showing the
2692 IP address twice in Received: lines, even though the IP addresses were
2693 identical. For example:
2695 Received: from [1.2.3.4] (helo=[1.2.3.4])
2697 However, if the real host name was known, it was omitting the HELO data
2698 if it matched the actual IP address. This has been tidied up so that it
2699 doesn't show the same IP address twice.
2701 PH/07 When both +timestamp and +memory debugging was on, the value given by
2702 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2703 called by the debug printing, thereby overwriting the timestamp buffer.
2704 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2706 PH/08 When the original message was included in an autoreply transport, it
2707 always said "this is a copy of the message, including all the headers",
2708 even if body_only or headers_only was set. It now gives an appropriate
2711 PH/09 Applied a patch from the Sieve maintainer which:
2713 o fixes some comments
2714 o adds the (disabled) notify extension core
2715 o adds some debug output for the result of if/elsif tests
2716 o points to the current vacation draft in the documentation
2717 and documents the missing references header update
2721 o fixes a bug in processing the envelope test (when testing
2722 multiple envelope elements, the last element determinted the
2725 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2726 Electronic Mail") by including:
2728 Auto-submitted: auto-generated
2730 in the messages that it generates (bounce messages and others, such as
2731 warnings). In the case of bounce messages for non-SMTP mesages, there was
2732 also a typo: it was using "Auto_submitted" (underscore instead of
2733 hyphen). Since every message generated by Exim is necessarily in response
2734 to another message, thes have all been changed to:
2736 Auto-Submitted: auto-replied
2738 in accordance with these statements in the RFC:
2740 The auto-replied keyword:
2742 - SHOULD be used on messages sent in direct response to another
2743 message by an automatic process,
2745 - MUST NOT be used on manually-generated messages,
2747 - MAY be used on Delivery Status Notifications (DSNs) and Message
2748 Disposition Notifications (MDNs),
2750 - MUST NOT be used on messages generated by automatic or periodic
2751 processes, except for messages which are automatic responses to
2754 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2755 to the default Received: header definition.
2757 PH/12 Added log selector acl_warn_skipped (default on).
2759 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2760 variables because (a) they are in the wrong storage pool and (b) even if
2761 they were copied, it wouldn't work properly because of the caching.
2763 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2764 checking when decoding. Apparently there are clients that generate
2765 overlong encoded strings. Why am I not surprised?
2767 PH/15 If the first argument of "${if match_address" was not empty, but did not
2768 contain an "@" character, Exim crashed. Now it writes a panic log message
2769 and treats the condition as false.
2771 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2773 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2774 extension "envelope-auth". The code is finished and in agreement with
2775 other implementations, but there is no documentation so far and in fact,
2776 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2777 not changing the active code.
2779 Print executed "if" and "elsif" statements when debugging is used. This
2780 helps a great deal to understand what a filter does.
2782 Document more things not specified clearly in RFC3028. I had all this
2783 sorted out, when out of a sudden new issues came to my mind. Oops."
2785 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2788 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2789 canonical form (as documented). However, after a host name lookup from
2790 the IP address, check_host() was doing a simple string comparison with
2791 addresses acquired from the DNS when checking that the found name did
2792 have the original IP as one of its addresses. Since any found IPv6
2793 addresses are likely to be in abbreviated form, the comparison could
2794 fail. Luckily, there already exists a function for doing the comparison
2795 by converting both addresses to binary, so now that is used instead of
2796 the text comparison.
2798 PH/20 There was another similar case to PH/19, when a complete host name was
2799 given in a host list; looking up its IP address could give an abbreviated
2800 form, whereas the current host's name might or might not be abbreviated.
2801 The same fix has been applied.
2807 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2808 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2811 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2812 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2814 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2816 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2817 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2818 Also, for "Auto-Submitted", treat anything other than "no" as
2819 non-personal, in accordance with RFC 3834. (Previously it treated
2820 anything starting "auto-" as non-personal.)
2822 TF/01 The control=submission/name=... option had a problem with syntax
2823 errors if the name included a slash character. The /name= option
2824 now slurps the rest of the string, so it can include any characters
2825 but it must come last in the list of options (after /sender_retain
2828 PH/05 Some modifications to the interface to the fake nameserver for the new
2836 TK/01 Added the "success_on_redirect" address verification option. See
2837 NewStuff for rationale and an example.
2839 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2841 PH/02 Patch to exigrep to allow it to work on syslog lines.
2843 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2844 fread() to skip over the body file's header line, because in Cygwin the
2845 header line is locked and is inaccessible.
2847 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2848 co-exist for some time) to make it clear that it is the Exim ID that is
2849 referenced, not the Message-ID: header line.
2851 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2852 string_format() function, because snprintf() does not exist on all
2855 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2856 ${stat: expansion item.
2858 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2859 protocol synchronization error", to keep the pedants happy.
2861 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2862 well as for IRIX systems, when gcc is being used. See the host.c source
2865 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2867 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2870 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2871 transport and to the smtp transport in LMTP mode.
2873 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2875 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2876 run a filter in a subprocess. This could lead to confusion in subsequent
2877 lookups in the parent process. There should also be a search_tidyup() at
2878 the end of the subprocess.
2880 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2881 only if the host matched helo_try_verify_hosts, which caused the
2882 verification to occur when the EHLO/HELO command was issued. The ACL just
2883 tested the remembered result. Now, if a previous verification attempt has
2884 not happened, "verify = helo" does it there and then.
2886 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2888 TK/03 Fix log output including CR from clamd.
2890 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2891 exist provoked a memory error which could cause a segfault.
2893 PH/15 Installed PCRE 6.2
2895 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2897 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2898 of the problem. Specifically, suggested +O2 rather than +O1 for the
2901 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2903 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2904 record, the port was not correctly logged when the outgoing_port log
2905 selector was set (it logged the transort's default port).
2907 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2908 fallback_hosts, and "hosts" in the smtp transport.
2910 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2911 host errors such as "Connection refused".
2913 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2914 authentication with radiusclient 0.4.9:
2916 - Error returned from rc_read_config was caught wrongly
2917 - Username/password not passed on to radius server due to wrong length.
2919 The presumption is that some radiusclient API changes for 4.51/PH/17
2920 were not taken care of correctly. The code is still untested by me (my
2921 Linux distribution still has 0.3.2 of radiusclient), but it was
2922 contributed by a Radius user.
2924 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2925 expanding the "port" option of the smtp transport.
2927 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2928 while reading a MIME header. Thanks to Tom Hughes for a patch.
2930 PH/24 Include config.h inside local_scan.h so that configuration settings are
2933 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2934 that in an ACL for RCPT (for example), you can examine exactly what was
2937 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2938 commands, but it was not correctly comparing the address with the actual
2939 client host address. Thus, it would show the EHLO address in Received:
2940 header lines when this was not necessary.
2942 PH/27 Added the % operator to ${eval:}.
2944 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2945 it should be ignoring failures (because with -C, for example, it has lost
2946 privilege). It wasn't ignoring creation failures other than "already
2949 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2952 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2953 because an input line was too long, either on its own, or by virtue of
2954 too many continuations, the temporary file was not being removed, and the
2955 return code was incorrect.
2957 PH/31 Missing "BOOL" in function definition in filtertest.c.
2959 PH/32 Applied Sieve patches from the maintainer.
2961 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2963 PH/33 Added "verify = not_blind".
2965 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2966 Local/Makefile (with some defaults set). These are used in built scripts
2967 such as exicyclog, but they have never been used in the exim_install
2968 script (though there are many overriding facilities there). I have
2969 arranged that the exim_install script now takes note of these two
2972 PH/35 Installed configuration files for Dragonfly.
2974 PH/36 When a locally submitted message by a trusted user did not contain a
2975 From: header, and the sender address was obtained from -f or from an SMTP
2976 MAIL command, and the trusted user did not use -F to supply a sender
2977 name, $originator_name was incorrectly used when constructing a From:
2978 header. Furthermore, $originator_name was used for submission mode
2979 messages from external hosts without From: headers in a similar way,
2980 which is clearly wrong.
2982 PH/37 Added control=suppress_local_fixups.
2984 PH/38 When log_selector = +received_sender was set, and the addition of the
2985 sender made the log line's construction buffer exactly full, or one byte
2986 less than full, an overflow happened when the terminating "\n" was
2989 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2990 when the result of a list match is failure because a DNS lookup failed.
2992 PH/40 RM_COMMAND is now used in the building process.
2994 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2995 the "build-* directories that it finds.
2997 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2998 address in a domain literal was a prefix of an interface address.
3000 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3001 when verifying a sender address, unless rewrite_headers is false.
3003 PH/44 Wrote a long comment about why errors_to addresses are verified as
3004 recipients, not senders.
3006 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3007 the ratelimit ACL was added.
3009 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3011 PH/46 Added extra information about PostgreSQL errors to the error string.
3013 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3014 avoiding the need to install special zones in a real server. This is
3015 backwards compatible; if it can't find the fake resolver, it drops back.
3016 Thus, both old and new test suites can be run.
3018 TF/02 Added util/ratelimit.pl
3020 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3021 clock is set back in time.
3023 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3024 Candler <B.Candler@pobox.com>.
3026 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3027 OK for addresses that are the result of redirections.
3029 PH/48 A number of further additions for the benefit of the new test suite,
3030 including a fake gethostbyname() that interfaces to the fake DNS resolver
3033 TF/06 The fix for widen_domains has also been applied to qualify_single and
3034 search_parents which are the other dnslookup options that can cause
3037 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3040 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3042 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3043 service" if it encountered an MX record with an empty target hostname.
3044 The message is now "an MX or SRV record indicated no SMTP service".
3046 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3047 if the DNS of the sending site is misconfigured. This is quite a
3048 common situation. This change restores the behaviour of treating a
3049 helo verification defer as a failure.
3051 PH/51 If self=fail was set on a router, the bounce message did not include the
3052 actual error message.
3058 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3060 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3061 command itself ended in error, the underlying message about the transport
3062 filter timeout was being overwritten with the pipe command error. Now the
3063 underlying error message should be appended to the second error message.
3065 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3067 PH/02 Reduce the amount of output that "make" produces by default. Full output
3068 can still be requested.
3070 PH/03 The warning log line about a condition test deferring for a "warn" verb
3071 was being output only once per connection, rather than after each
3072 occurrence (because it was using the same function as for successful
3073 "warn" verbs). This seems wrong, so I have changed it.
3075 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3076 it should not have, which might have caused a crash in the right
3077 circumstances, but probably never did.
3079 PH/04 Installed a modified version of Tony Finch's patch to make submission
3080 mode fix the return path as well as the Sender: header line, and to
3081 add a /name= option so that you can make the user's friendly name appear
3084 TF/03 Added the control = fakedefer ACL modifier.
3086 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3087 Mark Lowes for thorough testing.
3089 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3091 TK/03 Merged latest SRS patch from Miles Wilton.
3093 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3094 with the definition in sysexits.h (which is #included earlier).
3095 Fortunately, Exim does not actually use EX_OK. The code used to try to
3096 preserve the sysexits.h value, by assumimg that macro definitions were
3097 scanned for macro replacements. I have been disabused of this notion,
3098 so now the code just undefines EX_OK before #including unistd.h.
3100 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3101 in the smtp transport. When a block could not be written in a single
3102 write() function, the timeout was being re-applied to each part-write.
3103 This seems wrong - if the receiver was accepting one byte at a time it
3104 would take for ever. The timeout is now adjusted when this happens. It
3105 doesn't have to be particularly precise.
3107 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3108 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3110 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3111 without a domain if the check to <postmaster@domain> fails.
3113 SC/01 Eximstats: added -xls and the ability to specify output files
3114 (patch written by Frank Heydlauf).
3116 SC/02 Eximstats: use FileHandles for outputing results.
3118 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3120 SC/04 Eximstats: fixed display of large numbers with -nvr option
3122 SC/05 Eximstats: fixed merging of reports with empty tables.
3124 SC/06 Eximstats: added the -include_original_destination flag
3126 SC/07 Eximstats: removed tabs and trailing whitespace.
3128 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3130 TK/06 MBOX spool code: Add real "From " MBOX separator line
3131 so the .eml file is really in mbox format (even though
3132 most programs do not really care). Patch from Alex Miller.
3134 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3135 The latter is generated from $received_to and is only set if the
3136 message has one envelope recipient. SA can use these headers,
3137 obviously out-of-the-box. Patch from Alex Miller.
3139 PH/08 The ${def test on a variable was returning false if the variable's
3140 value was "0", contrary to what the specification has always said!
3141 The result should be true unless the variable is empty.
3143 PH/09 The syntax error of a character other than { following "${if
3144 def:variable_name" (after optional whitespace) was not being diagnosed.
3145 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3146 accidental colon was present, for example, could give incorrect results.
3148 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3149 result is used (not including appendfile, where other changes are about
3152 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3153 This involved changing a lot of size variables from int to off_t. It
3154 should work with maildirs and everything.
3156 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3157 spamd dying while we are connected to it.
3159 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3162 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3163 function for BDB 4.3.
3165 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3167 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3168 the sources for PCRE have been re-arranged and more files are now
3171 PH/15 The code I had for printing potentially long long variables in PH/11
3172 above was not the best (it lost precision). The length of off_t variables
3173 is now inspected at build time, and an appropriate printing format (%ld
3174 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3175 to be "long long int" or "long int". This is needed for the internal
3176 formatting function string_vformat().
3178 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3179 the configuration file to be ":syslog", then the script "guesses" where
3180 the logs files are, rather than using the compiled in default. In our
3181 case the guess is not the same as the compiled default, so the script
3182 suddenly stopped working when I started to use syslog. The patch checks
3183 to see if log_file_path is "". If so, it attempts to read it from exim
3184 with no configuration file to get the compiled in version, before it
3185 falls back to the previous guessing code."
3187 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3188 implementing BATV in an Exim configuration. See NewStuff for the gory
3191 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3192 Makefile that are specific to HP-UX.
3194 PH/18 If the "use_postmaster" option was set for a recipient callout together
3195 with the "random" option, the postmaster address was used as the MAIL
3196 FROM address for the random test, but not for the subsequent recipient
3197 test. It is now used for both.
3199 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3200 patch removes a few documentation additions to RFC 3028, because the
3201 latest draft now contains them. It adds the new en;ascii-case comparator
3202 and a new error check for 8bit text in MIME parts. Comparator and
3203 require names are now matched exactly. I enabled the subaddress
3204 extension, but it is not well tested yet (read: it works for me)."
3206 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3207 rework some of the code of TK/09 above to avoid the hardwired use of
3208 "%lld" and "long long". Replaced the call to snprintf() with a call to
3211 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3212 records point to non-existent hosts", "retry timeout exceeded", and
3213 "retry time not reached for any host after a long failure period".
3215 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3216 experimental DomainKeys support:
3218 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3219 (2) On an error such as an illegally used "control", the wrong name for
3220 the control was given.
3222 These problems did NOT occur unless DomainKeys support was compiled.
3224 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3226 PH/24 Added ${if match_ip condition.
3228 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3229 databases so that it will be absolutely obvious if a crash occurs in the
3230 DB library. This is a regular occurrence (often caused by mis-matched
3233 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3234 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3235 picked up on a user's system that detects such things. There doesn't seem
3236 to be a gcc warning option for this - only an attribute that has to be
3237 put on the function's prototype. It seems that in Fedora Core 4 they have
3238 set this on a number of new functions. No doubt there will be more in due
3241 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3242 specify a transport. However, if an address that was verified by such a
3243 router was the subject of a callout, Exim crashed because it tried to
3244 read the rcpt_include_affixes from the non-existent transport. Now it
3245 just assumes that the setting of that option is false. This bug was
3246 introduced by 4.51/PH/31.
3248 PH/28 Changed -d+all to exclude +memory, because that information is very
3249 rarely of interest, but it makes the output a lot bigger. People tend to
3250 do -d+all out of habit.
3252 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3253 code in os-type was giving problems when libc.so lives in lib64, like on
3256 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3257 aren't the modern standard, and it seems that some systems' include files
3258 don't always have them. Exim was already checking for some of the newer
3259 ones like T_AAAA, and defining it itself. I've added checks for all the
3260 record types that Exim uses.
3262 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3263 not automatically generating a new one, as it is supposed to. This
3264 prevented TLS from working. If the file did exist, but contained invalid
3265 data, a new version was generated, as expected. It was only the case of a
3266 non-existent file that was broken.
3268 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3269 with a change in libdomainkeys > 0.64.
3271 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3272 from DNS. If the selector record carries the flag, it now has
3273 precedence over the domain-wide flag.
3275 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3277 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3278 the use of a port name that isn't defined in /etc/services) occurred, the
3279 message was deferred as in a normal delivery, and thus remained on the
3280 spool, instead of being failed because of the mua_wrapper setting. This
3281 is now fixed, and I tidied up some of the mua_wrapper messages at the
3284 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3285 the messages in a hash of arrays rather than using individual hashes.
3286 This is a bit cleaner and results in dramatic memory savings, albeit
3287 at a slight CPU cost.
3289 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3290 as requested by Marc Sherman.
3292 SC/10 Eximstats: added histograms for user specified patterns as requested
3295 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3297 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3298 fopen() in the content-scanning modules that did not already have it.
3304 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3305 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3307 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3309 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3311 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3312 to test Sieve filters that use "vacation".
3314 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3315 that changes the way the GnuTLS parameters are stored in the cache file.
3316 The new format can be generated externally. For backward compatibility,
3317 if the data in the cache doesn't make sense, Exim assumes it has read an
3318 old-format file, and it generates new data and writes a new file. This
3319 means that you can't go back to an older release without removing the
3322 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3323 work if there are any delivery delays because "one_time" forces the
3324 parent to be marked "delivered", so its unseen clone is never tried
3325 again. For this reason, Exim now forbids the simultaneous setting of
3328 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3329 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3330 entry if you want to know the details. The fix, however, neglected to
3331 consider the case when local delivery batching is involved. The test for
3332 "previously delivered" was not happening when checking to see if an
3333 address could be batched with a previous (undelivered) one; under
3334 certain circumstances this could lead to multiple deliveries to the same
3337 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3338 in its include files, and this causes problems building Exim.
3340 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3341 header_syntax) but Exim was just ignoring anything given after a slash.
3342 In particular, this caused confusion with an attempt to use "verify =
3343 reverse_host_lookup/defer_ok". An error is now given when options are
3344 supplied for verify items that do not have them. (Maybe reverse_host_
3345 lookup should have a defer_ok option, but that's a different point.)
3347 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3348 defined by RFC 821) to 2048, because there were problems with some AUTH
3349 commands, and RFC 1869 says the size should be increased for extended
3350 SMTP commands that take arguments.
3352 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3355 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3356 "unknown" error; now it says that the functionality isn't in the binary.
3358 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3359 an address' error message when a string expansion fails (syntax or
3360 whatever). Otherwise the password may appear in the log. Following change
3361 PH/42 below, there is no longer a chance of it appearing in a bounce
3364 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3366 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3367 of its addresses was ever tried. (Bugzilla bug #2.)
3369 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3370 the result incorrectly in the debug output. (It correctly added a newline
3371 to what was transported.)
3373 TF/01 Added $received_time.
3375 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3376 commented out examples of how to interface to a virus scanner and to
3377 SpamAssassin. Also added commented examples of av_scanner and
3378 spamd_address settings.
3380 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3381 and controls are allowed in which ACLs. There were a couple of minor
3382 errors. Some of the entries in the conditions table (which is a table of
3383 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3384 negation of where the condition IS allowed.
3386 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3388 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3389 header file does not have a version number, so I've had to invent a new
3390 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3391 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3392 radiusclient), but it was contributed by a Radius user.
3394 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3395 files or directories, for OpenSSL.
3397 PH/19 When an Exim process that is running as root has to create an Exim log
3398 file, it does so in a subprocess that runs as exim:exim so as to get the
3399 ownership right at creation (otherwise, other Exim processes might see
3400 the file with the wrong ownership). There was no test for failure of this
3401 fork() call, which would lead to the process getting stuck as it waited
3402 for a non-existent subprocess. Forks do occasionally fail when resources
3403 run out. I reviewed all the other calls to fork(); they all seem to check
3406 PH/20 When checking for unexpected SMTP input at connect time (before writing
3407 the banner), Exim was not dealing correctly with a non-positive return
3408 from the read() function. If the client had disconnected by this time,
3409 the result was a log entry for a synchronization error with an empty
3410 string after "input=" when read() returned zero. If read() returned -1
3411 (an event I could not check), uninitialized data bytes were printed.
3412 There were reports of junk text (parts of files, etc) appearing after
3415 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3417 PH/22 Added support for macro redefinition, and (re)definition in between
3418 driver and ACL definitions.
3420 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3421 forgetting to use the resulting value; it was using the unexpanded value.
3423 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3424 hadn't been configured. The fix is from Juergen Kreileder, who
3425 understands it better than I do:
3427 "Here's what I see happening with three configured cyrus_sasl
3428 authenticators configured (plain, login, cram-md5):
3430 On startup auth_cyrus_sasl_init() gets called for each of these.
3431 This means three calls to sasl_listmech() without a specified mech_list.
3432 => SASL tests which mechs of all available mechs actually work
3433 => three warnings about OTP not working
3434 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3436 With the patch, sasl_listmech() also gets called three times. But now
3437 SASL's mech_list option is set to the server_mech specified in the the
3438 authenticator. Or in other words, the answer from sasl_listmech()
3439 gets limited to just the mech you're testing for (which is different
3441 => the return list contains just 'plain' or 'login', 'cram-md5' or
3442 nothing depending on the value of ob->server_mech.
3444 I've just tested the patch: Authentication still works fine,
3445 unavailable mechs specified in the exim configuration are still
3446 caught, and the auth.log warnings about OTP are gone."
3448 PH/25 When debugging is enabled, the contents of the command line are added
3449 to the debugging output, even when log_selector=+arguments is not
3452 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3453 answer is "GNU", and only if the return is "GNU/something" is the answer
3456 PH/27 $acl_verify_message is now set immediately after the failure of a
3457 verification in an ACL, and so is available in subsequent modifiers. In
3458 particular, the message can be preserved by coding like this:
3460 warn !verify = sender
3461 set acl_m0 = $acl_verify_message
3463 Previously, $acl_verify_message was set only while expanding "message"
3464 and "log_message" when a very denied access.
3466 PH/28 Modified OS/os.c-Linux with
3468 -#ifndef OS_LOAD_AVERAGE
3469 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3471 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3472 nomenclature these days.)
3474 PH/29 Installed patch from the Sieve maintainer that adds the options
3475 sieve_useraddress and sieve_subaddress to the redirect router.
3477 PH/30 In these circumstances:
3478 . Two addresses routed to the same list of hosts;
3479 . First host does not offer TLS;
3480 . First host accepts first address;
3481 . First host gives temporary error to second address;
3482 . Second host offers TLS and a TLS session is established;
3483 . Second host accepts second address.
3484 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3485 and peerdn, if requested) that were in fact used only for the second
3488 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3489 attention to any local part prefix or suffix that was matched by the
3490 router that accepted the address. It now behaves in the same way as it
3491 does for delivery: the affixes are removed from the local part unless
3492 rcpt_include_affixes is set on the transport.
3494 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3495 timeout during the DATA phase of an incoming message.
3497 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3498 applied a patch sanctioned by the Sieve maintainer.
3500 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3501 the uid or gid is negative. A case of a negative gid caused this to be
3502 noticed. The fix allows for either to be negative.
3504 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3505 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3508 PH/36 The change PH/12 above was broken. Fixed it.
3510 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3511 the grounds that routing the same address twice would always produce the
3512 same answer. This might have been true once, but it is certainly no
3513 longer true now. Routing a child address may depend on the previous
3514 routing that produced that child. Some complicated redirection strategies
3515 went wrong when messages had multiple recipients, and made Exim's
3516 behaviour dependent on the order in which the addresses were given.
3518 I have moved the duplicate checking until after the routing is complete.
3519 Exim scans the addresses that are assigned to local and remote
3520 transports, and removes any duplicates. This means that more work will be
3521 done, as duplicates will always all be routed, but duplicates are
3522 presumably rare, so I don't expect this is of any significance.
3524 For deliveries to pipes, files, and autoreplies, the duplicate checking
3525 still happens during the routing process, since they are not going to be
3528 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3529 It corrects a timeout issue with spamd. This is Ian's comment: "The
3530 background is that sometimes spamd either never reads data from a
3531 connection it has accepted, or it never writes response data. The exiscan
3532 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3533 blindly assumes that writes won't block so it may never time out."
3535 PH/39 Allow G after quota size as well as K and M.
3537 PH/40 The value set for $authenticated_id in an authenticator may not contain
3538 binary zeroes or newlines because the value is written to log lines and
3539 to spool files. There was no check on this. Now the value is run through
3540 the string_printing() function so that such characters are converted to
3541 printable escape sequences.
3543 PH/41 $message_linecount is a new variable that contains the total number of
3544 lines in the message. Compare $body_linecount, which is the count for the
3547 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3548 bounce and delay warning messages, except in certain special cases, which
3551 (a) An SMTP error message from a remote host;
3552 (b) A message specified in a :fail: redirection;
3553 (c) A message specified in a "fail" command in a system filter;
3554 (d) A message specified in a FAIL return from the queryprogram router;
3555 (e) A message specified by the cannot_route_message router option.
3557 In these cases only, Exim does include the error details in bounce and
3558 warning messages. There are also a few cases where bland messages such
3559 as "unrouteable address" or "local delivery error" are given.
3561 PH/43 $value is now also set for the "else" part of a ${run expansion.
3563 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3564 being worked on, but at least Exim now implements the latest version to
3567 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3568 process to complete was treated as a delivery failure, a timeout while
3569 writing the message to the pipe was logged, but erroneously treated as a
3570 successful delivery. Such timeouts include transport filter timeouts. For
3571 consistency with the overall process timeout, these timeouts are now
3572 treated as errors, giving rise to delivery failures by default. However,
3573 there is now a new Boolean option for the pipe transport called
3574 timeout_defer, which, if set TRUE, converts the failures into defers for
3575 both kinds of timeout. A transport filter timeout is now identified in
3578 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3579 systems where "make" and "gmake" are different, calling "gmake" at top
3580 level broke things. I've arranged for the value of $(MAKE) to be passed
3581 from the Makefile to this script so that it can call the same version of
3585 A note about Exim versions 4.44 and 4.50
3586 ----------------------------------------
3588 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3589 changes of various kinds. As a consequence, a big documentation update was
3590 needed. This delayed the release for rather longer than seemed good, especially
3591 in the light of a couple of (minor) security issues. Therefore, the changes
3592 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3593 release. So 4.44 and 4.50 are in effect two different branches that both start
3596 I have left the 4.50 change log unchanged; it contains all the changes since
3597 4.43. The change log for 4.44 is below; many of its items are identical to
3598 those for 4.50. This seems to be the most sensible way to preserve the
3599 historical information.
3605 1. Minor wording change to the doc/README.SIEVE file.
3607 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3608 computation of the current number of files was incorrect.
3610 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3611 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3614 4. Give more explanation in the error message when the command for a transport
3615 filter fails to execute.
3617 5. There are several places where Exim runs a non-Exim command in a
3618 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3619 was being done only for the command run by the queryprogram router. It is
3620 now done for all such subprocesses. The other cases are: ${run, transport
3621 filters, and the commands run by the lmtp and pipe transports.
3623 6. Added CONFIGURE_GROUP build-time option.
3625 7. Some older OS have a limit of 256 on the maximum number of file
3626 descriptors. Exim was using setrlimit() to set 1000 as a large value
3627 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3628 systems. I've change it so that if it can't get 1000, it tries for 256.
3630 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3631 was an oversight, and furthermore, ever since the addition of extra
3632 controls (e.g. 4.43/32), the checks on when to allow different forms of
3633 "control" were broken. There should now be diagnostics for all cases when a
3634 control that does not make sense is encountered.
3636 9. Added the /retain_sender option to "control=submission".
3638 10. $recipients is now available in the predata ACL (oversight).
3640 11. Tidy the search cache before the fork to do a delivery from a message
3641 received from the command line. Otherwise the child will trigger a lookup
3642 failure and thereby defer the delivery if it tries to use (for example) a
3643 cached ldap connection that the parent has called unbind on.
3645 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3646 of $address_data from the recipient verification was clobbered by the
3647 sender verification.
3649 13. The value of address_data from a sender verification is now available in
3650 $sender_address_data in subsequent conditions in the ACL statement.
3652 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3654 15. Added a new option "connect=<time>" to callout options, to set a different
3657 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3658 was its contents. (It was OK if the option was not defined at all.)
3660 17. A "Completed" log line is now written for messages that are removed from
3661 the spool by the -Mrm option.
3663 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3664 information about exactly what failed.
3666 19. Added -dd to debug only the daemon process.
3668 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3669 handles timeouts, both on the server side and network timeouts. Renamed the
3670 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3672 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3673 It is now set to "smtps".
3675 22. $host_address is now set to the target address during the checking of
3676 ignore_target_hosts.
3678 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3679 being passed; this would have caused $sender_host_name to have been used if
3680 matching the list had actually called for a host name (not very likely,
3681 since this list is usually IP addresses). A host name is now passed as
3684 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3685 code that specifies a non-restarting handler (typically sigaction() in
3686 modern systems) in an attempt to fix a rare and obscure crash bug.
3688 25. Narrowed the window for a race in the daemon that could cause it to ignore
3689 SIGCHLD signals. This is not a major problem, because they are used only to
3690 wake it up if nothing else does.
3692 26. A malformed maildirsize file could cause Exim to calculate negative values
3693 for the mailbox size or file count. Odd effects could occur as a result.
3694 The maildirsize information is now recalculated if the size or filecount
3697 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3698 support for a long time. Removed HAVE_SYS_VFS_H.
3700 28. Installed the latest version of exipick from John Jetmore.
3702 29. In an address list, if the pattern was not a regular expression, an empty
3703 subject address (from a bounce message) matched only if the pattern was an
3704 empty string. Non-empty patterns were not even tested. This was the wrong
3705 because it is perfectly reasonable to use an empty address as part of a
3706 database query. An empty address is now tested by patterns that are
3707 lookups. However, all the other forms of pattern expect the subject to
3708 contain a local part and a domain, and therefore, for them, an empty
3709 address still always fails if the pattern is not itself empty.
3711 30. Exim went into a mad DNS loop when attempting to do a callout where the
3712 host was specified on an smtp transport, and looking it up yielded more
3713 than one IP address.
3715 31. Re-factored the code for checking spool and log partition space into a
3716 function that finds that data and another that does the check. The former
3717 is then used to implement four new variables: $spool_space, $log_space,
3718 $spool_inodes, and $log_inodes.
3720 32. The RFC2047 encoding function was originally intended for short strings
3721 such as real names; it was not keeping to the 75-character limit for
3722 encoded words that the RFC imposes. It now respects the limit, and
3723 generates multiple encoded words if necessary. To be on the safe side, I
3724 have increased the buffer size for the ${rfc2047: expansion operator from
3727 33. It is now permitted to omit both strings after an "if" condition; if the
3728 condition is true, the result is "true". As before, when the second string
3729 is omitted, a false condition yields an empty string. This makes it less
3730 cumbersome to write custom ACL and router conditions.
3732 34. Failure to deliver a bounce message always caused it to be frozen, even if
3733 there was an errors_to setting on the router. The errors_to setting is now
3736 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3737 canonical form (fully expanded) before being placed in
3738 $sender_host_address.
3740 36. The table in the code that translates DNS record types into text (T_A to
3741 "A" for instance) was missing entries for NS and CNAME. It is just possible
3742 that this could have caused confusion if both these types were looked up
3743 for the same domain, because the text type is used as part of Exim's
3744 per-process caching. But the chance of anyone hitting this buglet seems
3747 37. The dnsdb lookup has been extended in a number of ways.
3749 (1) There is a new type, "zns", which walks up the domain tree until it
3750 finds some nameserver records. It should be used with care.
3752 (2) There is a new type, "mxh", which is like "mx" except that it returns
3753 just the host names, not the priorities.
3755 (3) It is now possible to give a list of domains (or IP addresses) to be
3756 looked up. The behaviour when one of the lookups defers can be
3757 controlled by a keyword.
3759 (4) It is now possible to specify the separator character for use when
3760 multiple records are returned.
3762 38. The dnslists ACL condition has been extended: it is now possible to supply
3763 a list of IP addresses and/or domains to be looked up in a particular DNS
3766 39. Added log_selector=+queue_time_overall.
3768 40. When running the queue in the test harness, wait just a tad after forking a
3769 delivery process, to get repeatability of debugging output.
3771 41. Include certificate and key file names in error message when GnuTLS fails
3772 to set them up, because the GnuTLS error message doesn't include the name
3773 of the failing file when there is a problem reading it.
3775 42. Allow both -bf and -bF in the same test run.
3777 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3779 44. The "Exiscan patch" is now merged into the mainline Exim source.
3781 45. Sometimes the final signoff response after QUIT could fail to get
3782 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3783 < 0 before doing a fflush(). This bug looks as though it goes back to the
3784 introduction of TLS in release 3.20, but "sometimes" must have been rare
3785 because the tests only now provoked it.
3787 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3788 (this can affect the format of dates).
3790 47. exim_tidydb, when checking for the continued existence of a message for
3791 which it has found a message-specific retry record, was not finding
3792 messages that were in split spool directories. Consequently, it was
3793 deleting retry records that should have stayed in existence.
3795 48. Steve fixed some bugs in eximstats.
3797 49. The SPA authentication driver was not abandoning authentication and moving
3798 on to the next authenticator when an expansion was forced to fail,
3799 contradicting the general specification for all authenticators. Instead it
3800 was generating a temporary error. It now behaves as specified.
3802 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3803 (the order specifies the preference for clients). The order is now AES256,
3804 AES128, 3DES, ARCFOUR128.
3806 51. Small patch to Sieve code - explicitly set From: when generating an
3809 52. Exim crashed if a remote delivery caused a very long error message to be
3810 recorded - for instance if somebody sent an entire SpamAssassin report back
3811 as a large number of 550 error lines. This bug was coincidentally fixed by
3812 increasing the size of one of Exim's internal buffers (big_buffer) that
3813 happened as part of the Exiscan merge. However, to be on the safe side, I
3814 have made the code more robust (and fixed the comments that describe what
3817 53. Now that there can be additional text after "Completed" in log lines (if
3818 the queue_time_overall log selector is set), a one-byte patch to exigrep
3819 was needed to allow it to recognize "Completed" as not the last thing in
3822 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3823 patch that reportedly fixes this has been added. I am not expert enough to
3824 create a test for it. This is what the patch creator wrote:
3826 "I found a little strange behaviour of ldap code when working with
3827 Windows 2003 AD Domain, where users was placed in more than one
3828 Organization Units. When I tried to give exim partial DN, the exit code
3829 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3830 But simultaneously result of request was absolutely normal ldap result,
3831 so I produce this patch..."
3833 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3834 REFERENCE, so I have modified the code to exclude the patch when that macro
3837 55. Some experimental protocols are using DNS PTR records for new purposes. The
3838 keys for these records are domain names, not reversed IP addresses. The
3839 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3840 leaves it alone. Component reversal etc. now happens only for IP addresses.
3843 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3845 57. Double the size of the debug message buffer (to 2048) so that more of very
3846 long debug lines gets shown.
3848 58. The exicyclog utility now does better if the number of log files to keep
3849 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3851 59. Two changes related to the smtp_active_hostname option:
3853 (1) $smtp_active_hostname is now available as a variable.
3854 (2) The default for smtp_banner uses $smtp_active_hostname instead
3855 of $primary_hostname.
3857 60. The host_aton() function is supposed to be passed a string that is known
3858 to be a valid IP address. However, in the case of IPv6 addresses, it was
3859 not checking this. This is a hostage to fortune. Exim now panics and dies
3860 if the condition is not met. A case was found where this could be provoked
3861 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3862 components; fortuitously, this particular loophole had already been fixed
3863 by change 4.50/55 above.
3865 If there are any other similar loopholes, the new check in host_aton()
3866 itself should stop them being exploited. The report I received stated that
3867 data on the command line could provoke the exploit when Exim was running as
3868 exim, but did not say which command line option was involved. All I could
3869 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3870 running as the user.
3873 61. There was a buffer overflow vulnerability in the SPA authentication code
3874 (which came originally from the Samba project). I have added a test to the
3875 spa_base64_to_bits() function which I hope fixes it.
3878 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3879 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3881 63. The daemon start-up calls getloadavg() while still root for those OS that
3882 need the first call to be done as root, but it missed one case: when
3883 deliver_queue_load_max is set with deliver_drop_privilege. This is
3884 necessary for the benefit of the queue runner, because there is no re-exec
3885 when deliver_drop_privilege is set.
3887 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3888 This has been fixed.
3890 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3891 was in use, was not putting the data itself into the right store pool;
3892 consequently, it could be overwritten for a subsequent message in the same
3893 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3896 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3898 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3899 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3900 the function were treating the return as a boolean value, which happened to
3901 work because 0=false and not-0=true, but is not correct code.
3903 68. The host_aton() function was not handling scoped IPv6 addresses (those
3904 with, for example, "%eth0" on the end) correctly.
3906 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3907 negated items (that is, ~something) in unsigned ints. Some compilers
3908 apparently mutter when there is no cast.
3910 70. If an address verification called from an ACL failed, and did not produce a
3911 user-specific message (i.e. there was only a "system" message), nothing was
3912 put in $acl_verify_message. In this situation, it now puts the system
3915 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3916 session; change 4.31/43 added the unwanted input to the log line - except
3917 that it did not do this in the start of session case. It now does.
3919 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3920 This is wrong and can cause the other end to generate a synchronization
3921 error if it is another Exim or anything else that does the synchronization
3922 check. A QUIT command is no longer sent after a timeout.
3924 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3925 during host lookups.
3927 74. The defer_ok option of callout verification was not working if it was used
3928 when verifying addresses in header lines, that is, for this case:
3930 verify = header_sender/callout=defer_ok
3932 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3933 those file descriptors could be used for SMTP connections. If anything
3934 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3935 could be sent to the SMTP client, causing chaos. The daemon now opens
3936 stdin, stdout, and stderr to /dev/null when it puts itself into the
3939 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3940 log by default. The user can override this with suitable Perl magic.
3942 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3943 the log message when discard triggers, was not working for the DATA ACL or
3944 for the non-SMTP ACL.
3946 78. Error message wording change in sieve.c.
3948 79. If smtp_accept_max_per_host was set, the number of connections could be
3949 restricted to fewer than expected, because the daemon was trying to set up
3950 a new connection before checking whether the processes handling previous
3951 connections had finished. The check for completed processes is now done
3952 earlier. On busy systems, this bug wouldn't be noticed because something
3953 else would have woken the daemon, and it would have reaped the completed
3956 80. If a message was submitted locally by a user whose login name contained one
3957 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3958 It caused a spool format error. I have fixed the spool reading code. A
3959 related problem was that the "from" clause in the Received: line became
3960 illegal because of the space(s). It is now covered by ${quote_local_part.
3962 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3965 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3967 83. Patch from Sieve maintainer to fix unterminated string problem in
3968 "vacation" handling.
3970 84. Some minor changes to the Linux configuration files to help with other
3971 OS variants using glibc.
3973 85. One more patch for Sieve to update vacation handling to latest spec.
3976 ----------------------------------------------------
3977 See the note above about the 4.44 and 4.50 releases.
3978 ----------------------------------------------------
3984 1. Change 4.43/35 introduced a bug that caused file counts to be
3985 incorrectly computed when quota_filecount was set in an appendfile
3988 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3989 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3992 3. Give more explanation in the error message when the command for a transport
3993 filter fails to execute.
3995 4. There are several places where Exim runs a non-Exim command in a
3996 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3997 was being done only for the command run by the queryprogram router. It is
3998 now done for all such subprocesses. The other cases are: ${run, transport
3999 filters, and the commands run by the lmtp and pipe transports.
4001 5. Some older OS have a limit of 256 on the maximum number of file
4002 descriptors. Exim was using setrlimit() to set 1000 as a large value
4003 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4004 systems. I've change it so that if it can't get 1000, it tries for 256.
4006 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4007 was an oversight, and furthermore, ever since the addition of extra
4008 controls (e.g. 4.43/32), the checks on when to allow different forms of
4009 "control" were broken. There should now be diagnostics for all cases when a
4010 control that does not make sense is encountered.
4012 7. $recipients is now available in the predata ACL (oversight).
4014 8. Tidy the search cache before the fork to do a delivery from a message
4015 received from the command line. Otherwise the child will trigger a lookup
4016 failure and thereby defer the delivery if it tries to use (for example) a
4017 cached ldap connection that the parent has called unbind on.
4019 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4020 of $address_data from the recipient verification was clobbered by the
4021 sender verification.
4023 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4024 was its contents. (It was OK if the option was not defined at all.)
4026 11. A "Completed" log line is now written for messages that are removed from
4027 the spool by the -Mrm option.
4029 12. $host_address is now set to the target address during the checking of
4030 ignore_target_hosts.
4032 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4033 being passed; this would have caused $sender_host_name to have been used if
4034 matching the list had actually called for a host name (not very likely,
4035 since this list is usually IP addresses). A host name is now passed as
4038 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4039 code that specifies a non-restarting handler (typically sigaction() in
4040 modern systems) in an attempt to fix a rare and obscure crash bug.
4042 15. Narrowed the window for a race in the daemon that could cause it to ignore
4043 SIGCHLD signals. This is not a major problem, because they are used only to
4044 wake it up if nothing else does.
4046 16. A malformed maildirsize file could cause Exim to calculate negative values
4047 for the mailbox size or file count. Odd effects could occur as a result.
4048 The maildirsize information is now recalculated if the size or filecount
4051 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4052 support for a long time. Removed HAVE_SYS_VFS_H.
4054 18. Updated exipick to current release from John Jetmore.
4056 19. Allow an empty sender to be matched against a lookup in an address list.
4057 Previously the only cases considered were a regular expression, or an
4060 20. Exim went into a mad DNS lookup loop when doing a callout where the
4061 host was specified on the transport, if the DNS lookup yielded more than
4064 21. The RFC2047 encoding function was originally intended for short strings
4065 such as real names; it was not keeping to the 75-character limit for
4066 encoded words that the RFC imposes. It now respects the limit, and
4067 generates multiple encoded words if necessary. To be on the safe side, I
4068 have increased the buffer size for the ${rfc2047: expansion operator from
4071 22. Failure to deliver a bounce message always caused it to be frozen, even if
4072 there was an errors_to setting on the router. The errors_to setting is now
4075 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4076 canonical form (fully expanded) before being placed in
4077 $sender_host_address.
4079 24. Updated eximstats to version 1.33
4081 25. Include certificate and key file names in error message when GnuTLS fails
4082 to set them up, because the GnuTLS error message doesn't include the name
4083 of the failing file when there is a problem reading it.
4085 26. Expand error message when OpenSSL has problems setting up cert/key files.
4088 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4089 (this can affect the format of dates).
4091 28. exim_tidydb, when checking for the continued existence of a message for
4092 which it has found a message-specific retry record, was not finding
4093 messages that were in split spool directories. Consequently, it was
4094 deleting retry records that should have stayed in existence.
4096 29. eximstats updated to version 1.35
4097 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4098 1.35 - bugfix such that pie charts by volume are generated correctly
4100 30. The SPA authentication driver was not abandoning authentication and moving
4101 on to the next authenticator when an expansion was forced to fail,
4102 contradicting the general specification for all authenticators. Instead it
4103 was generating a temporary error. It now behaves as specified.
4105 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4106 (the order specifies the preference for clients). The order is now AES256,
4107 AES128, 3DES, ARCFOUR128.
4109 31. Small patch to Sieve code - explicitly set From: when generating an
4112 32. Exim crashed if a remote delivery caused a very long error message to be
4113 recorded - for instance if somebody sent an entire SpamAssassin report back
4114 as a large number of 550 error lines. This bug was coincidentally fixed by
4115 increasing the size of one of Exim's internal buffers (big_buffer) that
4116 happened as part of the Exiscan merge. However, to be on the safe side, I
4117 have made the code more robust (and fixed the comments that describe what
4120 33. Some experimental protocols are using DNS PTR records for new purposes. The
4121 keys for these records are domain names, not reversed IP addresses. The
4122 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4123 leaves it alone. Component reversal etc. now happens only for IP addresses.
4126 34. The host_aton() function is supposed to be passed a string that is known
4127 to be a valid IP address. However, in the case of IPv6 addresses, it was
4128 not checking this. This is a hostage to fortune. Exim now panics and dies
4129 if the condition is not met. A case was found where this could be provoked
4130 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4131 components; fortuitously, this particular loophole had already been fixed
4132 by change 4.50/55 or 4.44/33 above.
4134 If there are any other similar loopholes, the new check in host_aton()
4135 itself should stop them being exploited. The report I received stated that
4136 data on the command line could provoke the exploit when Exim was running as
4137 exim, but did not say which command line option was involved. All I could
4138 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4139 running as the user.
4142 35. There was a buffer overflow vulnerability in the SPA authentication code
4143 (which came originally from the Samba project). I have added a test to the
4144 spa_base64_to_bits() function which I hope fixes it.
4147 36. The daemon start-up calls getloadavg() while still root for those OS that
4148 need the first call to be done as root, but it missed one case: when
4149 deliver_queue_load_max is set with deliver_drop_privilege. This is
4150 necessary for the benefit of the queue runner, because there is no re-exec
4151 when deliver_drop_privilege is set.
4153 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4154 was in use, was not putting the data itself into the right store pool;
4155 consequently, it could be overwritten for a subsequent message in the same
4156 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4159 38. Sometimes the final signoff response after QUIT could fail to get
4160 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4161 < 0 before doing a fflush(). This bug looks as though it goes back to the
4162 introduction of TLS in release 3.20, but "sometimes" must have been rare
4163 because the tests only now provoked it.
4169 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4170 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4171 Now it returns an integer. A number of calls were still expecting a T/F
4172 return. Fortuitously, in all cases, the tests worked in OK situations,
4173 which is the norm. However, things would have gone wrong on any write
4174 failures on the smtp file descriptor. This function is used when sending
4175 messages over SMTP and also when doing verify callouts.
4177 2. When Exim is called to do synchronous delivery of a locally submitted
4178 message (the -odf or -odi options), it no longer closes stderr before doing
4181 3. Implemented the mua_wrapper option.
4183 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4185 5. Implemented the functions header_remove(), header_testname(),
4186 header_add_at_position(), and receive_remove_recipient(), and exported them
4189 6. If an ACL "warn" statement specified the addition of headers, Exim already
4190 inserted X-ACL-Warn: at the start if there was no header name. However, it
4191 was not making this test for the second and subsequent header lines if
4192 there were newlines in the string. This meant that an invalid header could
4193 be inserted if Exim was badly configured.
4195 7. Allow an ACL "warn" statement to add header lines at the start or after all
4196 the Received: headers, as well as at the end.
4198 8. Added the rcpt_4xx retry error code.
4200 9. Added postmaster_mailfrom=xxx to callout verification option.
4202 10. Added mailfrom=xxxx to the callout verification option, for verify=
4205 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4206 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4208 12. Inserted some casts to stop certain compilers warning when using pointer
4209 differences as field lengths or precisions in printf-type calls (mostly
4210 affecting debugging statements).
4212 13. Added optional readline() support for -be (dynamically loaded).
4214 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4215 same clock tick as a message's arrival, so that its received time was the
4216 same as the "first fail" time on the retry record, and that message
4217 remained on the queue past the ultimate address timeout, every queue runner
4218 would try a delivery (because it was past the ultimate address timeout) but
4219 after another failure, the ultimate address timeout, which should have then
4220 bounced the address, did not kick in. This was a "< instead of <=" error;
4221 in most cases the first failure would have been in the next clock tick
4222 after the received time, and all would be well.
4224 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4225 being recognized when the domain list was tested by the match_domain
4226 condition in an expansion string.
4228 16. Added the ${str2b64: operator.
4230 17. Exim was always calling setrlimit() to set a large limit for the number of
4231 processes, without checking whether the existing limit was already
4232 adequate. (It did check for the limit on file descriptors.) Furthermore,
4233 errors from getrlimit() and setrlimit() were being ignored. Now they are
4234 logged to the main and panic logs, but Exim does carry on, to try to do its
4235 job under whatever limits there are.
4237 18. Imported PCRE 5.0.
4239 19. Trivial typo in log message " temporarily refused connection" (the leading
4242 20. If the log selector return_path_on_delivery was set and an address was
4243 redirected to /dev/null, the delivery process crashed because it assumed
4244 that a return path would always be set for a "successful" delivery. In this
4245 case, the whole delivery is bypassed as an optimization, and therefore no
4248 21. Internal re-arrangement: the function for sending a challenge and reading
4249 a response while authentication was assuming a zero-terminated challenge
4250 string. It's now changed to take a pointer and a length, to allow for
4251 binary data in such strings.
4253 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4255 23. Exim was not respecting finduser_retries when seeking the login of the
4256 uid under which it was called; it was always trying 10 times. (The default
4257 setting of finduser_retries is zero.) Also, it was sleeping after the final
4258 failure, which is pointless.
4260 24. Implemented tls_on_connect_ports.
4262 25. Implemented acl_smtp_predata.
4264 26. If the domain in control=submission is set empty, Exim assumes that the
4265 authenticated id is a complete email address when it generates From: or
4266 Sender: header lines.
4268 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4269 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4270 chown and chgrp in /bin and hostname in /usr/bin.
4272 28. Exim was keeping the "process log" file open after each use, just as it
4273 does for the main log. This opens the possibility of it remaining open for
4274 long periods when the USR1 signal hits a daemon. Occasional processlog
4275 errors were reported, that could have been caused by this. Anyway, it seems
4276 much more sensible not to leave this file open at all, so that is what now
4279 29. The long-running daemon process does not normally write to the log once it
4280 has entered its main loop, and it closes the log before doing so. This is
4281 so that log files can straightforwardly be renamed and moved. However,
4282 there are a couple of unusual error situations where the daemon does write
4283 log entries, and I had neglected to close the log afterwards.
4285 30. The text of an SMTP error response that was received during a remote
4286 delivery was being truncated at 512 bytes. This is too short for some of
4287 the long messages that one sometimes sees. I've increased the limit to
4290 31. It is now possible to make retry rules that apply only when a message has a
4291 specific sender, in particular, an empty sender.
4293 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4294 it possible to be selective about when SMTP synchronization is enforced.
4296 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4298 32. Implemented hosts_connection_nolog.
4300 33. Added an ACL for QUIT.
4302 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4305 35. Added mailbox_size and mailbox_filecount to appendfile.
4307 36. Added control = no_multiline_responses to ACLs.
4309 37. There was a bug in the logic of the code that waits for the clock to tick
4310 in the case where the clock went backwards by a substantial amount such
4311 that the microsecond fraction of "now" was more than the microsecond
4312 fraction of "then" (but the whole seconds number was less).
4314 38. Added support for the libradius Radius client library this is found on
4315 FreeBSD (previously only the radiusclient library was supported).
4321 1. When certain lookups returned multiple values in the form name=value, the
4322 quoting of the values was not always being done properly. Specifically:
4323 (a) If the value started with a double quote, but contained no whitespace,
4325 (b) If the value contained whitespace other than a space character (i.e.
4326 tabs or newlines or carriage returns) it was not quoted.
4327 This fix has been applied to the mysql and pgsql lookups by writing a
4328 separate quoting function and calling it from the lookup code. The fix
4329 should probably also be applied to nisplus, ibase and oracle lookups, but
4330 since I cannot test any of those, I have not disturbed their existing code.
4332 2. A hit in the callout cache for a specific address caused a log line with no
4333 reason for rejecting RCPT. Now it says "Previous (cached) callout
4334 verification failure".
4336 3. There was an off-by-one bug in the queryprogram router. An over-long
4337 return line was truncated at 256 instead of 255 characters, thereby
4338 overflowing its buffer with the terminating zero. As well as fixing this, I
4339 have increased the buffer size to 1024 (and made a note to document this).
4341 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4342 when Exim is waiting for an SMTP response from a remote server, Exim
4343 restarts its select() call on the socket, thereby resetting its timeout.
4344 This is not a problem when such interrupts are rare. Somebody set up a cron
4345 job to run exiwhat every 2 minutes, which is less than the normal select()
4346 timeout (5 or 10 minutes). This meant that the select() timeout never
4347 kicked in because it was always reset. I have fixed this by comparing the
4348 time when an interrupt arrives with the time at the start of the first call
4349 to select(). If more time than the timeout has elapsed, the interrupt is
4350 treated as a timeout.
4352 5. Some internal re-factoring in preparation for the addition of Sieve
4353 extensions (by MH). In particular, the "personal" test is moved to a
4354 separate function, and given an option for scanning Cc: and Bcc: (which is
4355 not set for Exim filters).
4357 6. When Exim created an email address using the login of the caller as the
4358 local part (e.g. when creating a From: or Sender: header line), it was not
4359 quoting the local part when it contained special characters such as @.
4361 7. Installed new OpenBSD configuration files.
4363 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4364 try to make them clearer.
4366 9. Callout options, other than the timeout value, were being ignored when
4367 verifying sender addresses in header lines. For example, when using
4369 verify = header_sender/callout=no_cache
4371 the cache was (incorrectly) being used.
4373 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4374 only the Cygwin environment.
4376 11. When return_path_on_delivery was set as a log selector, if different remote
4377 addresses in the same message used different return paths and parallel
4378 remote delivery occurred, the wrong values would sometimes be logged.
4379 (Whenever a remote delivery process finished, the return path value from
4380 the most recently started remote delivery process was logged.)
4382 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4383 lines when AUTH and/or TLS are in use. This is the "received protocol"
4384 field. Exim used to use "asmtp" for authenticated SMTP, without any
4385 indication (in the protocol name) for TLS use. Now it follows the RFC and
4386 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4387 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4388 names appear in log lines as well as in Received: header lines.
4390 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4391 extensions, and comparison tests, and to fix some bugs.
4393 14. Changes to the "personal" filter test:
4395 (1) The test was buggy in that it was just doing the equivalent of
4396 "contains" tests on header lines. For example, if a user's address was
4397 anne@some.where, the "personal" test would incorrectly be true for
4399 To: susanne@some.where
4401 This test is now done by extracting each address from the header in turn,
4402 and checking the entire address. Other tests that are part of "personal"
4403 are now done using regular expressions (for example, to check local parts
4404 of addresses in From: header lines).
4406 (2) The list of non-personal local parts in From: addresses has been
4407 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4408 taken from the Sieve specification recommendations.
4410 (3) If the message contains any header line starting with "List-" it is
4411 treated as non-personal.
4413 (4) The test for "circular" in the Subject: header line has been removed
4414 because it now seems ill-conceived.
4416 15. Minor typos in src/EDITME comments corrected.
4418 16. Installed latest exipick from John Jetmore.
4420 17. If headers_add on a router specified a text string that was too long for
4421 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4422 of string_sprintf() is now avoided.
4424 18. $message_body_size was not set (it was always zero) when running the DATA
4425 ACL and the local_scan() function.
4427 19. For the "mail" command in an Exim filter, no default was being set for
4428 the once_repeat time, causing a random time value to be used if "once" was
4429 specified. (If the value happened to be <= 0, no repeat happened.) The
4430 default is now 0s, meaning "never repeat". The "vacation" command was OK
4431 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4432 (I found it when inspecting the code).
4434 20. There is now an overall timeout for performing a callout verification. It
4435 defaults to 4 times the callout timeout, which applies to individual SMTP
4436 commands during the callout. The overall timeout applies when there is more
4437 than one host that can be tried. The timeout is checked before trying the
4438 next host. This prevents very long delays if there are a large number of
4439 hosts and all are timing out (e.g. when the network connections are timing
4440 out). The value of the overall timeout can be changed by specifying an
4441 additional sub-option for "callout", called "maxwait". For example:
4443 verify = sender/callout=5s,maxwait=20s
4445 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4446 to the end before writing, but this should make it even safer).
4448 22. Exim was forgetting that it had advertised PIPELINING for the second and
4449 subsequent messages on an SMTP connection. It was also not resetting its
4450 memory on STARTTLS and an internal HELO.
4452 23. When Exim logs an SMTP synchronization error within a session, it now
4453 records whether PIPELINING has been advertised or not.
4455 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4456 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4457 rather than long int.
4459 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4461 26. Added the never_mail option to autoreply.
4467 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4468 crash if the getsockname() call failed; this can happen if a connection is
4469 closed very soon after it is established. The problem was simply in the
4470 order in which certain operations were done, causing Exim to try to write
4471 to the SMTP stream before it had set up the file descriptor. The bug has
4472 been fixed by making things happen in the correct order.
4478 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4479 before the connection was closed, thus losing the rejection response.
4481 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4482 some early Solaris releases, but causes trouble in current releases where
4483 socklen_t is defined.
4485 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4488 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4491 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4492 that releasing the top of it at the end releases what was used for sub-
4493 expansions (unless the block got too big). However, discard this block if
4494 the first thing is a variable or header, so that we can use its block when
4495 it is dynamic (useful for very large $message_headers, for example).
4497 6. Lookups now cache *every* query, not just the most recent. A new, separate
4498 store pool is used for this. It can be recovered when all lookup caches are
4499 flushed. Lookups now release memory at the end of their result strings.
4500 This has involved some general refactoring of the lookup sources.
4502 7. Some code has been added to the store_xxx() functions to reduce the amount
4503 of flapping under certain conditions.
4505 8. log_incoming_interface used to affect only the <= reception log lines. Now
4506 it causes the local interface and port to be added to several more SMTP log
4507 lines, for example "SMTP connection from", and rejection lines.
4509 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4511 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4513 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4514 could be overwritten at the end of the current message (or the start of a
4515 new message if it was set in a HELO ACL). The value is now preserved for
4516 the duration of the SMTP connection.
4518 12. If a transport had a headers_rewrite setting, and a matching header line
4519 contained an unqualified address, that address was qualified, even if it
4520 did not match any rewriting rules. The underlying bug was that the values
4521 of the flags that permit the existence of unqualified sender and recipient
4522 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4523 non-local messages, and by -bnq for local messages) were not being
4524 preserved with the message after it was received.
4526 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4527 "next input=" as part of the text comprising the host identity instead of
4528 the correct text. The code was using the same buffer for two different
4529 strings. However, depending on which order the printing function evaluated
4530 its arguments, the bug did not always show up. Under Linux, for example, my
4531 test suite worked just fine.
4533 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4534 doesn't work with some older versions of Perl. It has been changed to "my",
4535 which in any case is probably the better facility to use.
4537 15. A really picky compiler found some instances of statements for creating
4538 error messages that either had too many or two few arguments for the format
4541 16. The size of the buffer for calls to the DNS resolver has been increased
4542 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4543 for addresses that have a lot of PTR records. This alleviates a problem; it
4544 does not fully solve it.
4546 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4547 buffer now truncates the list and logs the incident, which is the same
4548 action as happens when Exim is looking up a host name and its aliases.
4549 Previously in this situation something unpredictable would happen;
4550 sometimes it was "internal error: store_reset failed".
4552 18. If a server dropped the connection unexpectedly when an Exim client was
4553 using GnuTLS and trying to read a response, the client delivery process
4554 crashed while trying to generate an error log message.
4556 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4557 string, for example:
4559 warn message = H1: something\nH2: something
4561 the text was added as a single header line from Exim's point of view
4562 though it ended up OK in the delivered message. However, searching for the
4563 second and subsequent header lines using $h_h2: did not work. This has been
4564 fixed. Similarly, if a system filter added multiple headers in this way,
4565 the routers could not see them.
4567 20. Expanded the error message when iplsearch is called with an invalid key to
4568 suggest using net-iplsearch in a host list.
4570 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4571 ACLs are no longer actually imposed (and a message to that effect is
4574 22. If a "gecos" field in a passwd entry contained escaped characters, in
4575 particular, if it contained a \" sequence, Exim got it wrong when building
4576 a From: or a Sender: header from that name. A second bug also caused
4577 incorrect handling when an unquoted " was present following a character
4578 that needed quoting.
4580 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4581 was not being matched caselessly.
4583 24. Arranged for all hyphens in the exim.8 source to be escaped with
4586 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4587 properly. Recipient callout cache records were still being keyed to include
4588 the sender, even when use_sender was set false. This led to far more
4589 callouts that were necessary. The sender is no longer included in the key
4590 when use_sender is false.
4592 26. Added "control = submission" modifier to ACLs.
4594 27. Added the ${base62d: operator to decode base 62 numbers.
4596 28. dnsdb lookups can now access SRV records.
4598 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4599 the configuration file.
4601 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4602 (-v) mode. This makes the output for a verbose queue run more intelligible.
4604 31. Added a use_postmaster feature to recipient callouts.
4606 32. Added the $body_zerocount variable, containing the number of binary zero
4607 bytes in the message body.
4609 33. The time of last modification of the "new" subdirectory is now used as the
4610 "mailbox time last read" when there is a quota error for a maildir
4613 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4615 35. Added +ignore_unknown as a special item in host lists.
4617 36. Code for decoding IPv6 addresses in host lists is now included, even if
4618 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4619 address was recognized as an IP address, but was then not correctly decoded
4620 into binary, causing unexpected and incorrect effects when compared with
4627 1. Very minor rewording of debugging text in manualroute to say "list of
4628 hosts" instead of "hostlist".
4630 2. If verify=header_syntax was set, and a header line with an unqualified
4631 address (no domain) and a large number of spaces between the end of the
4632 name and the colon was received, the reception process suffered a buffer
4633 overflow, and (when I tested it) crashed. This was caused by some obsolete
4634 code that should have been removed. The fix is to remove it!
4636 3. When running in the test harness, delay a bit after writing a bounce
4637 message to get a bit more predictability in the log output.
4639 4. Added a call to search_tidyup() just before forking a reception process. In
4640 theory, someone could use a lookup in the expansion of smtp_accept_max_
4641 per_host which, without the tidyup, could leave open a database connection.
4643 5. Added the variables $recipient_data and $sender_data which get set from a
4644 lookup success in an ACL "recipients" or "senders" condition, or a router
4645 "senders" option, similar to $domain_data and $local_part_data.
4647 6. Moved the writing of debug_print from before to after the "senders" test
4650 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4651 problems for message scanning, either using a data ACL, or using
4652 local_scan() because the Received: header was not generated till after they
4653 were called (in order to set the time as the time of reception completion).
4654 I have revised the way this works. The header is now generated after the
4655 body is received, but before the ACL or local_scan() are called. After they
4656 are run, the timestamp in the header is updated.
4662 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4663 before starting a queue runner without re-exec. This happened only when
4664 deliver_drop_privilege was set or when the Exim user was set to root. The
4665 effect of the bug was that timeouts during subsequent deliveries caused
4666 crashes instead of being properly handled. The handler is now left at its
4667 default (and expected) setting.
4669 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4670 message, again when deliver_drop_privilege is set or Exim is run as root.
4671 The bug described in (1) was not present in this case, but the tidying up
4672 of the other signals was missing. I have made the two cases consistent.
4674 3. The ignore_target_hosts setting on a manualroute router was being ignored
4675 for hosts that were looked up using the /MX notation.
4677 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4680 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4681 operated on the sender address. After changing the $sender_address to <>
4682 for the sender address verify, Exim was re-instated it as the original
4683 (before rewriting) address, but remembering that it had rewritten it, so it
4684 wasn't rewriting it again. This bug also had the effect of breaking the
4685 sender address verification caching when the sender address was rewritten.
4687 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4688 This has been changed so that if the ip literal address matches
4689 ignore_target_hosts, the router declines.
4691 7. Added expansion conditions match_domain, match_address, and match_local_
4692 part (NOT match_host).
4694 8. The placeholder for the Received: header didn't have a length field set.
4696 9. Added code to Exim itself and to exim_lock to test for a specific race
4697 condition that could lead to file corruption when using MBX delivery. The
4698 issue is with the lockfile that is created in /tmp. If this file is removed
4699 after a process has opened it but before that process has acquired a lock,
4700 there is the potential for a second process to recreate the file and also
4701 acquire a lock. This could lead to two Exim processes writing to the file
4702 at the same time. The added code performs the same test as UW imapd; it
4703 checks after acquiring the lock that its file descriptor still refers to
4704 the same named file.
4706 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4707 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4710 11. Added the smtp_active_hostname option. If used, this will typically be made
4711 to depend on the incoming interface address. Because $interface_address is
4712 not set up until the daemon has forked a reception process, error responses
4713 that can happen earlier (such as "too many connections") no longer contain
4716 12. If an expansion in a condition on a "warn" statement fails because a lookup
4717 defers, the "warn" statement is abandoned, and the next ACL statement is
4718 processed. Previously this caused the whole ACL to be aborted.
4720 13. Added the iplsearch lookup type.
4722 14. Added ident_timeout as a log selector.
4724 15. Added tls_certificate_verified as a log selector.
4726 16. Added a global option tls_require_ciphers (compare the smtp transport
4727 option of the same name). This controls incoming TLS connections.
4729 17. I finally figured out how to make tls_require_ciphers do a similar thing
4730 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4731 before starting the TLS session.
4733 18. Tabs are now shown as \t in -bP output.
4735 19. If the log selector return_path_on_delivery was set, Exim crashed when
4736 bouncing a message because it had too many Received: header lines.
4738 20. If two routers both had headers_remove settings, and the first one included
4739 a superfluous trailing colon, the final name in the first list and the
4740 first name in the second list were incorrectly joined into one item (with a
4741 colon in the middle).
4747 1. Added -C and -D options to the exinext utility, mainly to make it easier
4748 to include in the automated testing, but these could be helpful when
4749 multiple configurations are in use.
4751 2. The exinext utility was not formatting the output nicely when there was
4752 an alternate port involved in the retry record key, nor when there was a
4753 message id as well (for retries that were specific to a specific message
4754 and a specific host). It was also confused by IPv6 addresses, because of
4755 the additional colons they contain. I have fixed the IPv4 problem, and
4756 patched it up to do a reasonable job for IPv6.
4758 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4759 delivery, the log line now contains "pipelined" if PIPELINING was used.
4761 4. An SMTP transport process used to panic and die if the bind() call to set
4762 an explicit outgoing interface failed. This has been changed; it is now
4763 treated in the same way as a connect() failure.
4765 5. A reference to $sender_host_name in the part of a conditional expansion
4766 that was being skipped was still causing a DNS lookup. This no longer
4769 6. The def: expansion condition was not recognizing references to header lines
4770 that used bh_ and bheader_.
4772 7. Added the _cache feature to named lists.
4774 8. The code for checking quota_filecount in the appendfile transport was
4775 allowing one more file than it should have been.
4777 9. For compatibility with Sendmail, the command line option
4785 and sets the incoming protocol and host name (for trusted callers). The
4786 host name and its colon can be omitted when only the protocol is to be set.
4787 Note the Exim already has two private options, -pd and -ps, that refer to
4788 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4789 "s", but I don't think that's a major issue.
4791 10. A number of refactoring changes to the code, none of which should affect
4794 (a) The number of logging options was getting close to filling up the
4795 32-bit word that was used as a bit map. I have split them into two classes:
4796 those that are passed in the argument to log_write(), and those that are
4797 only ever tested independently outside of that function. These are now in
4798 separate 32-bit words, so there is plenty of room for expansion again.
4799 There is no change in the user interface or the logging behaviour.
4801 (b) When building, for example, log lines, the code previously used a
4802 macro that called string_cat() twice, in order to add two strings. This is
4803 not really sufficiently general. Furthermore, there was one instance where
4804 it was actually wrong because one of the argument was used twice, and in
4805 one call a function was used. (As it happened, calling the function twice
4806 did not affect the overall behaviour.) The macro has been replaced by a
4807 function that can join an arbitrary number of extra strings onto a growing
4810 (c) The code for expansion conditions now uses a table and a binary chop
4811 instead of a serial search (which was left over from when there were very
4812 few conditions). Also, it now recognizes conditions like "pam" even when
4813 the relevant support is not compiled in: a suitably worded error message is
4814 given if an attempt is made to use such a condition.
4816 11. Added ${time_interval:xxxxx}.
4818 12. A bug was causing one of the ddress fields not to be passed back correctly
4819 from remote delivery subprocesses. The field in question was not being
4820 subsequently used, so this caused to problems in practice.
4822 13. Added new log selectors queue_time and deliver_time.
4824 14. Might have fixed a bug in maildirsizefile handling that threw up
4825 "unexpected character" debug warnings, and recalculated the data
4826 unnecessarily. In any case, I expanded the warning message to give more
4829 15. Added the message "Restricted characters in address" to the statements in
4830 the default ACL that block characters like @ and % in local parts.
4832 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4833 Three changes have been made:
4835 (a) There was a serious bug; a negative response to MAIL caused the whole
4836 recipient domain to be cached as invalid, thereby blocking all messages
4837 to all local parts at the same domain, from all senders. This bug has
4838 been fixed. The domain is no longer cached after a negative response to
4839 MAIL if the sender used is not empty.
4841 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4844 (c) A new callout option, "use_sender" has been added for people who want
4845 the modified behaviour.
4851 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4854 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4855 indeed breaks things for older releases.
4857 3. Added additional logging to the case where there is a problem reading data
4858 from a filter that is running in a subprocess using a pipe, in order to
4859 try to track down a specific problem.
4861 4. Testing facility fudge: when running in the test harness and attempting
4862 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4863 getting "No route to host". Convert this to a timeout.
4865 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4868 6. Some OS don't have socklen_t but use size_t instead. This affects the
4869 fifth argument of getsockopt() amongst other things. This is now
4870 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4871 can be set for individual OS. I have set it for SunOS5, OSF1, and
4872 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4873 some earlier ones do not.
4875 7. Change 4.30/15 was not doing the test caselessly.
4877 8. The standard form for an IPv6 address literal was being rejected by address
4878 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4879 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4880 this, as well as the form without the "IPv6" on the front (but only when
4881 address literals are enabled, of course).
4883 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4885 10. Exim crashed if a message with an empty sender address specified by -f
4886 encountered a router with an errors_to setting. This could be provoked only
4887 by a command such as
4891 where an empty string was supplied; "<>" did not hit this bug.
4893 11. Installed PCRE release 4.5.
4895 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4896 remained set. It is now erased.
4898 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4899 times from message ids (which are base 36 rather than the normal 62).
4901 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4902 were being counted as actual protocol errors, and logged if the log
4903 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4904 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4905 and DATA following a set of rejected RCPTs do not count as protocol errors.
4906 In other words, Exim assumes they were pipelined, though this may not
4907 actually be the case. Of course, in all cases the client gets an
4908 appropriate error code.
4910 15. If a lookup fails in an ACL condition, a message about the failure may
4911 be available; it is used if testing the ACL cannot continue, because most
4912 such messages specify what the cause of the deferral is. However, some
4913 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4914 that caused an old message to be retained and used if a later statement
4915 caused a defer, replacing the real cause of the deferral.
4917 16. If an IP address had so many PTR records that the DNS lookup buffer
4918 was not large enough to hold them, Exim could crash while trying to process
4919 the truncated data. It now detects and logs this case.
4921 17. Further to 4.21/58, another change has been made: if (and only if) the
4922 first line of a message (the first header line) ends with CRLF, a bare LF
4923 in a subsequent header line has a space inserted after it, so as not to
4924 terminate the header.
4926 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4927 unnecessarily, used atoi() instead of strtol(), and didn't check the
4928 termination when getting file sizes from file names by regex.
4930 19. Completely re-implemented the support for maildirsize files, in the light
4931 of a number of problems with the previous contributed implementation
4932 (4.30/29). In particular:
4934 . If the quota is zero, the maildirsize file is maintained, but no quota is
4937 . If the maildir directory does not exist, it is created before any attempt
4938 to write a maildirsize file.
4940 . The quota value in the file is just a cache; if the quota is changed in
4941 the transport, the new value overrides.
4943 . A regular expression is available for excluding directories from the
4946 20. The autoreply transport checks the characters in options that define the
4947 message's headers; it allows continued headers, but it was checking with
4948 isspace() after an embedded newline instead of explicitly looking for a
4951 21. If all the "regular" hosts to which an address was routed had passed their
4952 expiry times, and had not reached their retry times, the address was
4953 bounced, even if fallback hosts were defined. Now Exim should go on to try
4956 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4957 equivalent code in the SMTP transport. Some hosts send humungous responses
4958 to HELO/EHLO, more than 1024 it seems.
4960 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4961 gives compiler warnings in some environments. I've now done it "properly",
4964 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4965 (because of problems with the built-in one) was declared to return uschar *
4966 instead of char *, causing compiler failure.
4968 25. Fixed a file descriptor leak when processing alias/forward files.
4970 26. Fixed a minor format string issue in dbfn.c.
4972 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4974 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4975 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4978 29. When a sender address is verified, it is cached, to save repeating the test
4979 when there is more than one recipient in a message. However, when the
4980 verification involves a callout, it is possible for different callout
4981 options to be set for different recipients. It is too complicated to keep
4982 track of this in the cache, so now Exim always runs a verification when a
4983 callout is required, relying on the callout cache for the optimization.
4984 The overhead is duplication of the address routing, but this should not be
4987 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4988 to be verified with callout=postmaster, and the main callout worked but the
4989 postmaster check failed, the verification correctly failed. However, if a
4990 subsequent RCPT command asked for sender verification *without* the
4991 postmaster check, incorrect caching caused this verification also to fail,
4994 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4995 it was not caching the DNS options (qualify_single, search_parents) that
4996 were used when the lookup failed. A subsequent lookup with different
4997 options therefore always gave the same answer, though there were cases
4998 where it should not have. (Example: a "domains = !$mx_any" option on a
4999 dnslookup router: the "domains" option is always processed without any
5000 widening, but the router might have qualify_single set.) Now Exim uses the
5001 cached value only when the same options are set.
5003 32. Added John Jetmore's "exipick" utility to the distribution.
5005 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5006 than a timeout (e.g. a certificate is required, and is not provided), an
5007 Exim server now closes the connection immediately. Previously it waited for
5008 the client to close - but if the client is SSL, it seems that they each
5009 wait for each other, leading to a delay before one of them times out.
5011 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5012 maintained 0.8.x compatibility because I don't think many are using it, and
5013 it is clearly obsolete.
5015 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5018 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5019 client certificate was expired. A simple patch fixes this, though I don't
5020 understand the full logic of why the verify callback is called multiple
5023 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5024 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5025 which causes problems with some clients (such as the Certicom SSL Plus
5026 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5027 disables the coutermeasure allowing Eudora to connect."
5029 38. Exim was not checking that a write() to a log file succeeded. This could
5030 lead to Bad Things if a log got too big, in particular if it hit a file
5031 size limit. Exim now panics and dies if it cannot write to a log file, just
5032 as it does if it cannot open a log file.
5034 39. Modified OS/Makefile-Linux so that it now contains
5036 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5038 The two -D definitions ensure that Exim is compiled with large file
5039 support, which makes it possible to handle log files that are bigger than
5042 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5043 instance) a domain was checked against a named list that involved a lookup,
5044 causing $domain_data to be set, then another domain was checked against the
5045 same list, then the first domain was re-checked, the value of $domain_data
5046 after the final check could be wrong. In particular, if the second check
5047 failed, it could be set empty. This bug probably also applied to
5050 41. The strip_trailing_dot option was not being applied to the address given
5051 with the -f command-line option.
5053 42. The code for reading a message's header from the spool was incrementing
5054 $received_count, but never initializing it. This meant that the value was
5055 incorrect (doubled) while delivering a message in the same process in which
5056 it was received. In the most common configuration of Exim, this never
5057 happens - a fresh exec is done - but it can happen when
5058 deliver_drop_privilege is set.
5060 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5061 it now includes up to 150 characters of the unexpected data in the log
5064 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5065 and building data strings. The size of both of these buffers was 10 000
5066 bytes - far larger than anybody would *ever* want, thought I. Needless to
5067 say, somebody hit the limit. I have increased the maximum line length to
5068 20 000 and the maximum data length of concatenated lines to 100 000. I have
5069 also fixed two bugs, because there was no checking on these buffers. Tsk,
5070 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5071 buffer is too small.
5073 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5074 lsearch lookups. Now it does.
5076 46. When parsing a route_list item in a manualroute router, a fixed-length
5077 buffer was used for the list of hosts. I made this 1024 bytes long,
5078 thinking that nobody would ever have a list of hosts that long. Wrong.
5079 Somebody had a whole pile of complicated expansion conditions, and the
5080 string was silently truncated, leading to an expansion error. It turns out
5081 that it is easier to change to an unlimited length (owing to other changes
5082 that have happened since this code was originally written) than to build
5083 structure for giving a limitation error. The length of the item that
5084 expands into the list of hosts is now unlimited.
5086 47. The lsearch lookup could not handle data where the length of text line was
5087 more than 4095 characters. Such lines were truncated, leading to shortened
5088 data being returned. It should now handle lines of any length.
5090 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5091 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5094 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5095 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5096 no longer happens in comment lines. A list of replacements is now placed
5097 at the head of all of the source files, except those whose only change is
5098 to replace PERL_COMMAND in the very first #! line.
5100 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5101 messages on the queue, with a bottom-up merge sort, using code contributed
5102 by Michael Haardt. This should make operations like -bp somewhat faster on
5103 large queues. It won't affect queue runners, except when queue_run_in_order
5106 51. Installed eximstats 1.31 in the distribution.
5108 52. Added support for SRV lookups to the dnslookup router.
5110 53. If an ACL referred to $message_body or $message_body_end, the value was not
5111 reset for any messages that followed in the same SMTP session.
5113 54. The store-handling optimization for building very long strings was not
5114 differentiating between the different store pools. I don't think this
5115 actually made any difference in practice, but I've tidied it.
5117 55. While running the routers to verify a sender address, $sender_address
5118 was still set to the sender address. This is wrong, because when routing to
5119 send a bounce to the sender, it would be empty. Therefore, I have changed
5120 it so that, while verifying a sender address, $sender_address is set to <>.
5121 (There is no change to what happens when verifying a recipient address.)
5123 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5124 target A or AAAA records (if not already returned) without resetting the
5125 qualify_single or search_parents options of the DNS resolver. These are
5126 inappropriate in this case because the targets of MX and SRV records must
5127 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5128 target that, when qualified, matched something in the local domain. These
5129 two options are now turned off when doing these lookups.
5131 57. It seems that at least some releases of Reiserfs (which does not have the
5132 concept of a fixed number of inodes) returns zero and not -1 for the
5133 number of available inodes. This interacted badly with check_spool_inodes,
5134 which assumed that -1 was the "no such thing" setting. What I have done is
5135 to check that the total number of inodes is greater than zero before doing
5136 the test of how many are available.
5138 58. When a "warn" ACL statement has a log_message modifier, the message is
5139 remembered, and not repeated. This is to avoid a lot of repetition when a
5140 message has many recipients that cause the same warning to be written.
5141 Howewer, Exim was preserving the list of already written lines for an
5142 entire SMTP session, which doesn't seem right. The memory is now reset if a
5143 new message is started.
5145 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5146 debugging output unless log_rewrite was also set.
5148 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5149 of (int)(handle) when we know that handle contains (void *)(-1).
5151 61. The Exim daemon panic-logs an error return when it closes the incoming
5152 connection. However "connection reset by peer" seems to be common, and
5153 isn't really an error worthy of noting specially, so that particular error
5156 62. When Exim is trying to find all the local interfaces, it used to panic and
5157 die if the ioctl to get the interface flags failed. However, it seems that
5158 on at least one OS (Solaris 9) it is possible to have an interface that is
5159 included in the list of interfaces, but for which you get a failure error
5160 for this call. This happens when the interface is not "plumbed" into a
5161 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5162 failure of the "get flags" call assumes that the interface is down.
5164 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5165 makes life easier for people who are doing arithmetic on fields extracted
5166 from dates, where you often get leading zeros that should not be
5167 interpreted as octal.
5169 64. Added qualify_domain to the redirect router, to override the global
5172 65. If a pathologically long header line contained very many addresses (the
5173 report of this problem mentioned 10 000) and each of them was rewritten,
5174 Exim could use up a very large amount of memory. (It kept on making new
5175 copies of the header line as it rewrote, and never released the old ones.)
5176 At the expense of a bit more processing, the header rewriting function has
5177 been changed so that it no longer eats memory in this way.
5179 66. The generation of the Received: header has been moved from the time that a
5180 message starts to be received, to the time that it finishes. The timestamp
5181 in the Received: header should now be very close to that of the <= log
5182 line. There are two side-effects of this change:
5184 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5185 logged header lines no longer include the local Received: line, because
5186 it has not yet been created. The same applies to a copy of the message
5187 that is returned to a non-SMTP sender when a message is rejected.
5189 (b) When a filter file is tested using -bf, no additional Received: header
5190 is added to the test message. After some thought, I decided that this
5193 This change does not affect the value of $received_for. It is still set
5194 after address rewriting, but before local_scan() is called.
5196 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5198 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5199 gave an unhelpful panic error message, and a defer error. I have managed to
5200 change this behaviour so that it now rejects any supplied certificate,
5201 which seems right, as the list of acceptable certificates is empty.
5203 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5204 gave an unhelpful defer error. I have not managed to make this reject any
5205 supplied certificates, but the error message it gives is "no certificate
5206 supplied", which is not helpful.
5208 70. exigrep's output now also includes lines that are not associated with any
5209 message, but which match the given pattern. Implemented by a patch from
5210 Martin Sluka, which also tidied up the Perl a bit.
5212 71. Recipient callout verification, like sender verification, was using <> in
5213 the MAIL FROM command. This isn't really the right thing, since the actual
5214 sender may affect whether the remote host accepts the recipient or not. I
5215 have changed it to use the actual sender in the callout; this means that
5216 the cache record is now keyed on a recipient/sender pair, not just the
5217 recipient address. There doesn't seem to be a real danger of callout loops,
5218 since a callout by the remote host to check the sender would use <>.
5219 [SEE ABOVE: changed after hitting problems.]
5221 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5222 temporary errors. However, in the case of such a code being given after
5223 the end of a data transmission (i.e. after ".") Exim was failing to write
5224 a retry record for the message. (Yes, there was some broken host that was
5225 actually sending 8xx at this point.)
5227 73. An unknown lookup type in a host list could cause Exim to panic-die when
5228 the list was checked. (An example that provoked this was putting <; in the
5229 middle of a list instead of at the start.) If this happened during a DATA
5230 ACL check, a -D file could be left lying around. This kind of configuration
5231 error no longer causes Exim to die; instead it causes a defer errror. The
5232 incident is still logged to the main and panic logs.
5234 74. Buglet left over from Exim 3 conversion. The message "too many messages
5235 in one connection" was written to the rejectlog but not the mainlog, except
5236 when address rewriting (yes!) was being logged.
5238 75. Added write_rejectlog option.
5240 76. When a system filter was run not as root (that is, when system_filter_user
5241 was set), the values of the $n variables were not being returned to the
5242 main process; thus, they were not subsequently available in the $sn
5245 77. Added +return_path_on_delivery log selector.
5247 78. A connection timeout was being treated differently from recipients deferred
5248 when testing hosts_max_try with a message that was older than the host's
5249 retry timeout. (The host should not be counted, thus allowing all hosts to
5250 be tried at least once before bouncing.) This may have been the cause of an
5251 occasionally reported bug whereby a message would remain on the queue
5252 longer than the retry timeout, but would be bounced if a delivery was
5253 forced. I say "may" because I never totally pinned down the problem;
5254 setting up timeout/retry tests is difficult. See also the next item.
5256 79. The ultimate address timeout was not being applied to errors that involved
5257 a combination of host plus message (for example, a timeout on a MAIL
5258 command). When an address resolved to a number of possible hosts, and they
5259 were not all tried for each delivery (e.g. because of hosts_max_try), a
5260 message could remain on the queue longer than the retry timeout.
5262 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5265 81. Fixed an obscure SMTP outgoing bug which required at least the following
5266 conditions: (a) there was another message waiting for the same server;
5267 (b) the server returned 5xx to all RCPT commands in the first message so
5268 that the message was not completed; (c) the server dropped the connection
5269 or gave a negative response to the RSET that Exim sends to abort the
5270 transaction. The observed case was a dropped connection after DATA that had
5271 been sent in pipelining mode. That is, the server had advertised PIPELINING
5272 but was not implementing it correctly. The effect of the bug was incorrect
5273 behaviour, such as trying another host, and this could lead to a crash.
5279 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5280 and daemon.c were passed as pointers to ints; they should have been
5281 pointers to socklen_t variables (which are typically unsigned ints).
5283 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5286 3. Fixed a really odd bug that affected only the testing scheme; patching a
5287 certain fixed string in the binary changed the value of another string that
5288 happened to be identical to the end of the original first string.
5290 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5291 name", it returns that address as the IP address. On some operating
5292 systems (e.g. Solaris), it also passes back the IP address string as the
5293 "host name". However, on others (e.g. Linux), it passes back an empty
5294 string. Exim wasn't checking for this, and was changing the host name to an
5295 empty string, assuming it had been canonicized.
5297 5. Although rare, it is permitted to have more than one PTR record for a given
5298 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5299 all the names associated with an address, because they do in Solaris.
5300 However, it seems that they do not in Linux for data that comes from the
5301 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5302 I found this out when I moved to a new Linux workstation and tried to run
5303 the Exim test suite.
5305 To get round this problem I have changed the code so that it now does its
5306 own call to the DNS to look up PTR records when searching for a host name.
5307 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5308 addresses that are only in /etc/hosts are still found.
5310 This behaviour is, however, controlled by an option called host_lookup_
5311 order, which defaults to "bydns:byaddr". If people want to use the other
5312 order, or indeed, just use one or the other means of lookup, they can
5313 specify it in this variable.
5315 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5316 some operating systems, this comes back from gethostbyaddr() as an empty
5317 string, and this is what Exim used to test for. However, it seems that in
5318 other systems, "." is yielded. Exim now tests for this case too.
5320 7. The values of check_spool_space and check_log_space are now held internally
5321 as a number of kilobytes instead of an absolute number of bytes. If a
5322 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5323 kilobyte. This means that much larger values can be stored.
5325 8. Exim monitor: an attempt to get the action menu when not actually pointing
5326 at a message produces an empty menu entitled "No message selected". This
5327 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5328 no entries in it ("Shell widget menu has zero width and/or height"). So I
5329 have added a single, blank menu entry in this case.
5331 9. Added ${quote_local_part.
5333 10. MIME decoding is now applied to the contents of Subject: header lines when
5336 11. Now that a reference to $sender_host_address automatically causes a reverse
5337 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5338 host lookup before query-style lookups in lists that might use this
5339 variable. This has therefore been abolished, and the "net-" prefix is no
5340 longer necessary for query-style lookups.
5342 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5343 have been a typo for LFLAGS, so it has been changed.
5345 13. The install script calls Exim with "-C /dev/null" in order to find the
5346 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5347 to be output. Howeve, since Exim outputs its version number before the
5348 error, it didn't break the script. It just looked ugly. I fixed this by
5349 always allowing "-C /dev/null" if the caller is root.
5351 14. Ignore overlarge ACL variable number when reading spool file - insurance
5352 against a later release with more variables having written the file.
5354 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5355 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5356 this, as well as the form without the "IPv6" on the front.
5358 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5359 OS/Makefile-Darwin file.
5361 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5362 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5364 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5365 variable. However, some OS use ints for inodes. I've added cast to long int
5366 to get rid of the compiler warning.
5368 19. I had forgotten to lock out "/../" in configuration file names when
5369 ALT_CONFIG_PREFIX was set.
5371 20. Routers used for verification do not need to specify transports. However,
5372 if such a router generated a host list, and callout was configured, Exim
5373 crashed, because it could not find a port number from the (non-existent)
5374 transport. It now assumes port 25 in this circumstance.
5376 21. Added the -t option to exigrep.
5378 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5379 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5380 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5381 them is set, LOOKUP_LSEARCH is forced.
5383 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5385 24. Added sender and host information to the "rejected by local_scan()" log
5386 line; previously there was no indication of these.
5388 25. Added .include_if_exists.
5390 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5391 Linux. It turns out that not all file systems support this. Apparently some
5392 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5393 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5394 not supported on the file descriptor, is now ignored when Exim is trying to
5395 sync a directory. This applies only to Linux.
5397 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5399 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5400 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5403 29. Added support for maildirsize files from supplied patch (modified a bit).
5405 30. The use of :fail: followed by an empty string could lead Exim to respond to
5406 sender verification failures with (e.g.):
5408 550 Verification failed for <xxx>
5409 550 Sender verify failed
5411 where the first response line was missing the '-' that indicates it is not
5412 the final line of the response.
5414 31. The loop for finding the name of the user that called Exim had a hardwired
5415 limit of 10; it now uses the value of finduser_retries, which is used for
5416 all other user lookups.
5418 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5421 33. Exim was neglecting to zero errno before one call of strtol() when
5422 expanding a string and expecting an integer value. On some systems this
5423 resulted in spurious "integer overflow" errors. Also, it was casting the
5424 result into an int without checking.
5426 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5427 did not work. The code looks as if it has *never* worked, though it appears
5428 to have been documented since at least releast 1.62. I have made it work.
5430 35. The "timeout_DNS" error in retry rules, also documented since at least
5431 1.62, also never worked. As it isn't clear exactly what this means, and
5432 clearly it isn't a major issue, I have abolished the feature by treating it
5433 as "timeout", and writing a warning to the main and panic logs.
5435 36. The display of retry rules for -brt wasn't always showing the error code
5438 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5439 timeout_connect_A, timeout_connect_MX.
5441 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5442 to the empty sender.
5444 39. The daemon was not analysing the content of -oX till after it had closed
5445 stderr and disconnected from the controlling terminal. This meant that any
5446 syntax errors were only noted on the panic log, and the return code from
5447 the command was 0. By re-arranging the code a little, I've made the
5448 decoding happen first, so such errors now appear on stderr, and the return
5449 code is 1. However, the actual setting up of the sockets still happens in
5450 the disconnected process, so errors there are still only recorded on the
5453 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5454 connections (as happens on some IP stacks) was logged at start up time as
5455 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5456 it from "IPv6 and IPv4", which means that two separate sockets are being
5459 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5460 says whether AF_INET or AF_INET6 was passed as an argument.
5462 42. Exiwhat output was messed up when time zones were included in log
5465 43. Exiwhat now gives more information about the daemon's listening ports,
5466 and whether -tls-on-connect was used.
5468 44. The "port" option of the smtp transport is now expanded.
5470 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5471 silently ignored. Now an error message is written to the main and panic
5474 46. There's a new ACL modifier called "logwrite" which writes to a log file
5475 as soon as it is encountered.
5477 47. Added $local_user_uid and $local_user_gid at routing time.
5479 48. Exim crashed when trying to verify a sender address that was being
5482 49. Exim was recognizing only a space character after ".include". It now also
5483 recognizes a tab character.
5485 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5486 extracting the relevant information from the specification. The man page no
5487 longer contains scrambled data for the -d option, and I've added a section
5488 at the front about calling Exim under different names.
5490 51. Added "extra_headers" argument to the "mail" command in filter files.
5492 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5495 53. Installed eximstats 1.29.
5497 54. Added transport_filter_timeout as a generic transport option.
5499 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5500 Cc: header lines. This was required by RFC 822, but it not required by RFC
5503 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5504 incoming messages that did not have them. Now it does so only if the
5505 message originates locally, that is, if there is no associated remote host
5506 address. When Resent- header lines are present, this applies to the Resent-
5507 lines rather than the non-Resent- lines.
5509 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5510 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5512 58. Messages for configuration errors now include the name of the main
5513 configuration file - useful now that there may be more than one file in a
5514 list (.included file names were always shown).
5516 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5517 for those rare installations that do not start the daemon as root or run it
5518 setuid root. I've cut out the call to initgroups() if the daemon is not
5521 60. The Exim user and group can now be bound into the binary as text strings
5522 that are looked up at the start of Exim's processing.
5524 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5526 62. Added $mailstore_basename variable.
5528 63. Installed patch to sieve.c from Michael Haardt.
5530 64. When Exim failed to open the panic log after failing to open the main log,
5531 the original message it was trying to log was written to stderr and debug
5532 output, but if they were not available (the usual case in production), it
5533 was lost. Now it is written to syslog before the two lines that record the
5534 failures to open the logs.
5536 65. Users' Exim filters run in subprocesses under the user's uid. It is
5537 possible for a "deliver" command or an alias in a "personal" command to
5538 provoke an address rewrite. If logging of address rewriting is configured,
5539 this fails because the process is not running as root or exim. There may be
5540 a better way of dealing with this, but for the moment (because 4.30 needs
5541 to be released), I have disabled address rewrite logging when running a
5542 filter in a non-root, non-exim process.
5548 1. The buildconfig auxiliary program wasn't quoting the value set for
5549 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5550 not defined. This bug was masked in 4.22 by the effect that was fixed in
5553 2. Some messages that were rejected after a message id was allocated were
5554 shown as "incomplete" by exigrep. It no longer does this for messages that
5555 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5557 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5558 have allow_domain_literals set, the ID did not get logged in the <= line.
5559 Domain literals are now always recognized in Message-ID: header lines.
5561 4. The first argument for a ${extract expansion item is the key name or field
5562 number. Leading and trailing spaces in this item were not being ignored,
5563 causing some misleading effects.
5565 5. When deliver_drop_privilege was set, single queue runner processes started
5566 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5567 same command in the process it spins off) were not dropping privilege.
5569 6. When the daemon running as "exim" started a queue runner, it always
5570 re-executed Exim in the spun-off process. This is a waste of effort when
5571 deliver_drop_privilege is set. The new process now just calls the
5572 queue-runner function directly.
5578 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5581 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5582 ignored. Though the use of -oP was forcing the writing of a pid file, it
5583 was always written to the default place.
5585 3. If the message "no IP address found for host xxxx" is generated during
5586 incoming verification, it is now followed by identification of the incoming
5587 connection (so you can more easily find what provoked it).
5589 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5591 5. Added some features to "harden" Exim a bit more against certain attacks:
5593 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5594 be put in Local/Makefile. This is like the never_users runtime option,
5595 but it cannot be overridden. The default setting is "root".
5597 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5598 prefix string with which any file named in a -C command line option
5601 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5602 is retained for -C and -D only if the caller of Exim is root. Without
5603 it, the exim user may also use -C and -D and retain privilege.
5605 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5606 command line option is disabled.
5608 6. Macro names set by the -D option must start with an upper case letter, just
5609 like macro names defined in the configuration file.
5611 7. Added "dereference=" facility to LDAP.
5613 8. Two instances of the typo "uknown" in the source files are fixed.
5615 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5616 the Configure-Makefile script screwed up while processing it.
5618 10. Incorporated PCRE 4.4.
5620 11. The SMTP synchronization check was not operating right at the start of an
5621 SMTP session. For example, it could not catch a HELO sent before the client
5622 waited for the greeting. There is now a check for outstanding input at the
5623 point when the greeting is written. Because of the duplex, asynchronous
5624 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5625 way, but not yet received, when the check is performed.
5627 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5628 on TCP/IP sockets, because this apparently causes some broken clients to
5631 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5632 unchanged) from the Cygwin maintainer.
5634 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5635 was supported instead of testing for mbx. Effectively a typo.
5637 15. The spa authenticator server code was not checking that the input it
5638 received was valid base64.
5640 16. The debug output line for the "set" modifier in ACLs was not showing the
5641 name of the variable that was being set.
5643 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5645 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5646 lookup on its own. Something else was needed to trigger the lookup. For
5647 example, a match in host_lookup or the need for a host name in a host list.
5648 Now, if $sender_host_name is referenced and the host name has not yet been
5649 looked up, a lookup is performed. If the lookup fails, the variable remains
5650 empty, and $host_lookup_failed is set to "1".
5652 19. Added "eqi" as a case-independent comparison operator.
5654 20. The saslauthd authentication condition could segfault if neither service
5655 nor realm was specified.
5657 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5658 error message that was logged was misleading, and incoming SMTP
5659 connections were dropped. The message is now more accurate, and temporary
5660 errors are given to SMTP connections.
5662 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5663 (except RSET) with a 421 error, until QUIT is received. However, it was
5664 failing to send a response to QUIT.
5666 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5667 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5668 ACL is now run after the helo_try_verify_hosts code.
5670 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5671 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5672 case-independent, so other case variants are also recognized). Apparently
5673 some systems use these upper case variants.
5675 25. If more than two messages were waiting for the same host, and a transport
5676 filter was specified for the transport, Exim sent two messages over the
5677 same TCP/IP connection, and then failed with "socket operation on non-
5678 socket" when it tried to send the third.
5680 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5682 27. The extern definition of crypt16() in expand.c was not being excluded when
5683 the OS had its own crypt16() function.
5685 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5686 as a preferred synonym for return_size_limit, both as an option and as an
5689 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5691 30. Changed the default configuration ACL to relax the local part checking rule
5692 for addresses that are not in any local domains. For these addresses,
5693 slashes and pipe symbols are allowed within local parts, but the sequence
5694 /../ is explicitly forbidden.
5696 31. SPA server authentication was not clearing the challenge buffer before
5699 32. log_message in a "warn" ACL statement was writing to the reject log as
5700 well as to the main log, which contradicts the documentation and doesn't
5701 seem right (because no rejection is happening). So I have stopped it.
5703 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5704 However, I am unable to do any testing of this.
5706 34. Fixed an infelicity in the appendfile transport. When checking directories
5707 for a mailbox, to see if any needed to be created, it was accidentally
5708 using path names with one or more superfluous leading slashes; tracing
5709 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5711 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5712 contents are added to the log line that is written for every discarded
5713 recipient. (Previously a log_message setting was ignored.)
5715 36. The ${quote: operator now quotes the string if it is empty.
5717 37. The install script runs exim in order to find its version number. If for
5718 some reason other than non-existence or emptiness, which it checks, it
5719 could not run './exim', it was installing it with an empty version number,
5720 i.e. as "exim-". This error state is now caught, and the installation is
5723 38. An argument was missing from the function that creates an error message
5724 when Exim fails to connect to the socket for saslauthd authentication.
5725 This could cause Exim to crash, or give a corrupted message.
5727 39. Added isip, isip4, and isip6 to ${if conditions.
5729 40. The ACL variables $acl_xx are now saved with the message, and can be
5730 accessed later in routers, transports, and filters.
5732 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5733 strings in the file are not string-expanded.
5735 42. If a MAIL command specified a SIZE value that was too large to fit into an
5736 int variable, the check against message_size_limit failed. Such values are
5737 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5738 day this will have to be increased, but I don't think I want to be around
5739 when emails are that large.
5746 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5747 iconv() is not standard in FreeBSD.
5749 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5750 IPv6 enabled. The observed symptom was a segmentation fault on return from
5751 the function os_common_find_running_interfaces() in src/os.c.
5753 3. In the check_special_case() function in daemon.c I had used "errno" as an
5754 argument name, which causes warnings on some systems. This was basically a
5755 typo, since it was named "eno" in the comments!
5757 4. The code that waits for the clock to tick (at a resolution of some fraction
5758 of a second) so as to ensure message-id uniqueness was always waiting for
5759 at least one whole tick, when it could have waited for less. [This is
5760 almost certainly not relevant at current processor speeds, where it is
5761 unlikely to ever wait at all. But we try to future-proof.]
5763 5. The function that sleeps for a time interval that includes fractions of a
5764 second contained a race. It did not block SIGALRM between setting the
5765 timer, and suspending (a couple of lines later). If the interval was short
5766 and the sigsuspend() was delayed until after it had expired, the suspension
5767 never ended. On busy systems this could lead to processes getting stuck for
5770 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5771 process, before it forks any delivery processes. The open lookup caching
5772 mechanism meant that the open file or database connection was passed into
5773 the delivery process. The problem was that delivery processes always tidy
5774 up cached lookup data. This could cause a problem for the next delivery
5775 process started by the queue runner, because the external queue runner
5776 process does not know about the closure. So the next delivery process
5777 still has data in the lookup cache. In the case of a file lookup, there was
5778 no problem because closing a file descriptor in a subprocess doesn't affect
5779 the parent. However, if the lookup was caching a connection to a database,
5780 the connection was closed, and the second delivery process was likely to
5781 see errors such as "PGSQL: query failed: server closed the connection
5782 unexpectedly". The problem has been fixed by closing all cached lookups
5783 in a queue runner before running a delivery process.
5785 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5786 seem to have the "const" qualifier which it has on other OS. I've
5789 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5790 *of the same type* (client or server) with the same public name that an
5791 error should be diagnosed.
5793 9. When Exim looked up a host name for an IP address, but failed to find the
5794 original IP address when looking up the host name (a safety check), it
5795 output the message "<ip address> does not match any IP for NULL", which was
5796 confusing, to say the least. The bug was that the host name should have
5797 appeared instead of "NULL".
5799 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5800 user that is built into the binary, and the -C or -D options is used, root
5801 privilege is dropped before the configuration file is read. In addition,
5802 logging is switched to stderr instead of the normal log files. If the
5803 configuration then re-defines the Exim user, the unprivileged environment
5804 is probably not what is expected, so Exim logs a panic warning message (but
5807 However, if deliver_drop_privilege is set, the unprivileged state may well
5808 be exactly what is intended, so the warning has been cut out in that case,
5809 and Exim is allowed to try to write to its normal log files.
5815 1. smtp_return_error_details was not giving details for temporary sender
5816 or receiver verification errors.
5818 2. Diagnose a configuration error if two authenticators have the same public
5821 3. Exim used not to create the message log file for a message until the first
5822 delivery attempt. This could be confusing when incoming messages were held
5823 for policy or load reasons. The message log file is now created at the time
5824 the message is received, and an initial "Received" line is written to it.
5826 4. The automatically generated man page for command line options had a minor
5827 bug that caused no ill effects; however, a more serious problem was that
5828 the procedure for building the man page automatically didn't always
5829 operate. Consequently, release 4.20 contains an out-of-date version. This
5830 shouldn't happen again.
5832 5. When building Exim with embedded Perl support, the script that builds the
5833 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5834 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5836 6. The freeze_tell option was not being used for messages that were frozen on
5837 arrival, either by an ACL or by local_scan().
5839 7. Added the smtp_incomplete_transaction log selector.
5841 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5842 was accepting AUTH without a new EHLO.
5844 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5845 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5848 10. Logging of TCP/IP connections (when configured) now happens in the main
5849 daemon process instead of the child process, so that the TCP/IP connection
5850 count is more accurate (but it can never be perfect).
5852 11. The use of "drop" in a nested ACL was not being handled correctly in the
5853 outer ACL. Now, if condition failure induced by the nested "drop" causes
5854 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5855 or "require"), the connection is dropped.
5857 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5858 that yield "discard" can now be used with an "accept" or a "discard" verb,
5859 but an error is generated for any others (because I can't see a useful way
5860 to define what should happen).
5862 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5863 are now processed in the same way as lines in the Exim configuration file.
5864 In particular, continuation lines are supported.
5866 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5868 15. Added -ti meaning -t -i.
5870 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5871 domains, and warn by logging if others are found.
5873 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5874 returned from GIFCONF when Exim is trying to find the list of interfaces on
5875 a host. The code in os.c has been modified to copy each ifreq to an aligned
5876 structure in all cases.
5878 Also, in some cases, the returned ifreq's were being copied to a 'struct
5879 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5880 means the last couple of bytes of an IPv6 address could be chopped if the
5881 ifreq contained only a normal sockaddr (14 bytes storage).
5883 18. Named domain lists were not supported in the hosts_treat_as_local option.
5884 An entry such as +xxxx was not recognized, and was treated as a literal
5887 19. Ensure that header lines added by a DATA ACL are included in the reject log
5888 if the ACL subsequently rejects the message.
5890 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5891 MD5 (which is deprecated).
5893 21. When testing a filter file using -bf, Exim was writing a message when it
5894 took the sender from a "From " line in the message, but it was not doing so
5895 when it took $return_path from a Return-Path: header line. It now does.
5897 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5898 with a valid header line field name (a series of printing characters
5899 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5901 23. Changed "disc" in the source to "disk" to conform to the documentation and
5902 the book and for uniformity.
5904 24. Ignore Sendmail's -Ooption=value command line item.
5906 25. When execve() failed while trying to run a command in a pipe transport,
5907 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5908 could be confused with a return value of 69 from the command itself. This
5909 has been changed to 127, the value the shell returns if it is asked to run
5910 a non-existent command. The wording for the related log line suggests a
5911 non-existent command as the problem.
5913 26. If received_header_text expands to an empty string, do not add a Received:
5914 header line to the message. (Well, it adds a token one on the spool, but
5915 marks it "old" so that it doesn't get used or transmitted.)
5917 27. Installed eximstats 1.28 (addition of -nt option).
5919 28. There was no check for failure on the call to getsockname() in the daemon
5920 code. This can fail if there is a shortage of resources on the system, with
5921 ENOMEM, for example. A temporary error is now given on failure.
5923 29. Contrary to the C standard, it seems that in some environments, the
5924 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5925 program. Exim now does this explicitly; it affects the formatting of
5926 timestamps using strftime().
5928 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5929 complaints. I've now initialized all the variables, to avoid this.
5931 32. Header lines added by a system filter were not being "seen" during
5932 transport-time rewrites.
5934 33. The info_callback() function passed to OpenSSL is set up with type void
5935 (*)(SSL *, int, int), as described somewhere. However, when calling the
5936 function (actually a macro) that sets it up, the type void(*)() is
5937 expected. I've put in a cast to prevent warnings from picky compilers.
5939 34. If a DNS black list lookup found a CNAME record, but there were no A
5940 records associated with the domain it pointed at, Exim crashed.
5942 35. If a DNS black list lookup returned more than one A record, Exim ignored
5943 all but the first. It now scans all returned addresses if a particular IP
5944 value is being sought. In this situation, the contents of the
5945 $dnslist_value variable are a list of all the addresses, separated by a
5948 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5949 to accept a host name and all its aliases if the forward lookup for any of
5950 them yielded the IP address of the incoming connection. Now it accepts only
5951 those names whose forward lookup yields the correct IP address. Any other
5952 names are discarded. This closes a loophole whereby a rogue DNS
5953 administrator could create reverse DNS records to break through a
5954 wildcarded host restriction in an ACL.
5956 37. If a user filter or a system filter that ran in a subprocess used any of
5957 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5958 the wrong values were passed to the pipe command ($thisaddress had the
5959 value of $0, $0 had the value of $1, etc). This bug was introduced by
5960 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5962 38. Improved the line breaking for long SMTP error messages from ACLs.
5963 Previously, if there was no break point between 40 and 75 characters, Exim
5964 left the rest of the message alone. Two changes have been made: (a) I've
5965 reduced the minimum length to 35 characters; (b) if it can't find a break
5966 point between 35 and 75 characters, it looks ahead and uses the first one
5967 that it finds. This may give the occasional overlong line, but at least the
5968 remaining text gets split now.
5970 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5971 file descriptors might be low, and that setting 1000 would always raise it.
5972 It turns out that in some environments, the limit is already over 1000 and
5973 that lowering it causes trouble. So now Exim takes care not to decrease it.
5975 40. When delivering a message, the value of $return_path is set to $sender_
5976 address at the start of routing (routers may change the value). By an
5977 oversight, this default was not being set up when an address was tested by
5978 -bt or -bv, which affected the outcome if any router or filter referred to
5981 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5982 log only when "message" or "log_message" are set. However, if one of the
5983 conditions was an address verification, or a call to a nested ACL, the
5984 messages generated by the underlying test were being passed through. This
5985 no longer happens. The underlying message is available in $acl_verify_
5986 message for both "message" and "log_message" expansions, so it can be
5987 passed through if needed.
5989 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5990 new expansion $bh_ to give the encoded byte string without charset
5991 translation. Translation happens only if iconv() is available; HAVE_ICONV
5992 indicates this at build time. HEADERS_CHARSET gives the charset to
5993 translate to; headers_charset can change it in the configuration, and
5994 "headers charset" can change it in an individual filter file.
5996 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5997 that creates RFC 2047 encoded "words" labels them as that charset instead
5998 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5999 expansion operator; (ii) when Exim creates a From: line for a local
6000 message; (iii) when a header line is rewritten to include a "phrase" part.
6002 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6003 buggy, causing it to skip the first lines of messages whose message ID
6004 ended in 'D'. This would not have bitten before Exim release 4.14, because
6005 message IDs were unlikely to end in 'D' before then. The effect was to have
6006 incorrect size information for certain domains.
6008 45. #include "config.h" was missing at the start of the crypt16.c module. This
6009 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6012 46. If there was a timeout during a "random" callout check, Exim treated it as
6013 a failure of the random address, and carried on sending RSET and the real
6014 address. If the delay was just some slowness somewhere, the response to the
6015 original RCPT would be taken as a response to RSET and so on, causing
6016 mayhem of various kinds.
6018 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6019 when I implemented it. It didn't allow for the fact that some option values
6020 may legitimatetly be negative (e.g. size_addition), and it didn't even do
6021 the right test for positive values.
6023 48. Domain names in DNS records are case-independent. Exim always looks them up
6024 in lower case. Some resolvers return domain names in exactly the case they
6025 appear in the zone file, that is, they may contain uppercase letters. Not
6026 all resolvers do this - some return always lower case. Exim was treating a
6027 change of case by a resolver as a change of domain, similar to a widening
6028 of a domain abbreviation. This triggered its re-routing code and so it was
6029 trying to route what was effectively the same domain again. This normally
6030 caused routing to fail (because the router wouldn't handle the domain
6031 twice). Now Exim checks for this case specially, and just changes the
6032 casing of the domain that it ultimately uses when it transmits the message
6035 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6038 50. If a filter generated a file delivery with a non-absolute name (possible if
6039 no home directory exists for the router), the forbid_file option was not
6042 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6043 the existing equality matching.
6045 52. Exim was using ints instead of ino_t variables in some places where it was
6046 dealing with inode numbers.
6048 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6049 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6050 called TMPDIR, and if it finds it is different, it changes its value.
6052 54. The smtp_printf() function is now made available to local_scan() so
6053 additional output lines can be written before returning. There is also an
6054 smtp_fflush() function to enable the detection of a dropped connection.
6055 The variables smtp_input and smtp_batched_input are exported to
6058 55. Changed the default runtime configuration: the message "Unknown user"
6059 has been removed from the ACL, and instead placed on the localuser router,
6060 using the cannot_route_message feature. This means that any verification
6061 failures that generate their own messages won't get overridden. Similarly,
6062 the "Unrouteable address" message that was in the ACL for unverifiable
6063 relay addresses has also been removed.
6065 56. Added hosts_avoid_esmtp to the smtp transport.
6067 57. The exicyclog script was not checking for the esoteric option
6068 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6069 will work only if exicyclog is run under the appropriate euid.
6071 58. Following a discussion on the list, the rules by which Exim recognises line
6072 endings on incoming messages have been changed. The -dropcr and drop_cr
6073 options are now no-ops, retained only for backwards compatibility. The
6074 following line terminators are recognized: LF CRLF CR. However, special
6075 processing applies to CR:
6077 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6078 nor a local message in the state where . is a terminator.
6080 (ii) If a bare CR is encountered in a header line, an extra space is added
6081 after the line terminator so as not to end the header. The reasoning
6082 behind this is that bare CRs in header lines are most likely either
6083 to be mistakes, or people trying to play silly games.
6085 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6086 was being incorrectly given as 18 bytes larger than it should have been.
6087 This is a VOB (very old bug).
6089 60. This may never have affected anything current, but just in case it has:
6090 When the local host is found other than at the start of a list of hosts,
6091 the local host, those with the same MX, and any that follow, are discarded.
6092 When the list in question was part of a longer list of hosts, the following
6093 hosts (not currently being processed) were also being discarded. This no
6094 longer happens. I'm not sure if this situation could ever has previously
6097 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6100 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6101 header. This is something that is recommended in a new Internet Draft, and
6102 is something that is documented as being done by Sendmail. There are two
6103 possible values. For messages generated by the autoreply transport, Exim
6106 Auto-Submitted: auto-replied
6108 whereas for all other generated messages (e.g. bounces) it adds
6110 Auto-Submitted: auto-generated
6112 63. The "personal" condition in filters now includes a test for the
6113 Auto-Submitted: header. If it contains the string "auto-" the message it
6114 not considered personal.
6116 64. Added rcpt_include_affixes as a generic transport option.
6118 65. Added queue_only_override (default true).
6120 66. Added the syslog_duplication option.
6122 67. If what should have been the first header line of a message consisted of
6123 a space followed by a colon, Exim was mis-interpreting it as a header line.
6124 It isn't of course - it is syntactically invalid and should therefore be
6125 treated as the start of the message body. The misbehaviour could have
6126 caused a number of strange effects, including loss of data in subsequent
6127 header lines, and spool format errors.
6129 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6130 client host had authenticated. This control can now be exercised by an ACL
6131 for more flexibility.
6133 69. By default, callouts do not happen when testing with -bh. There is now a
6134 variant, -bhc, which does actually run the callout code, including
6135 consulting and updating the callout cache.
6137 70. Added support for saslauthd authentication, courtesy of Alexander
6140 71. If statvfs() failed on the spool or log directories while checking their
6141 size for availability, Exim confusingly gave the error "space shortage".
6142 Furthermore, in debugging mode it crashed with a floating point exception.
6143 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6144 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6145 serious problem, Exim now writes to the main and panic logs when this
6146 happens, with details of the failure. It then refuses to accept the
6147 incoming message, giving the message "spool directory problem" or "log
6148 directory problem" with a 421 code for SMTP messages.
6150 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6151 0, 1, and 2 exist, because some OS complain for execs without them (see
6152 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6153 descriptors. However, the code omitted to check that the open succeeded,
6154 causing mysterious errors if for some reason the permissions on /dev/null
6155 got screwed. Now Exim writes a message to the main and panic logs, and
6156 bombs out if it can't open /dev/null.
6158 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6159 interact so that it is all more flexible. It is supposed to remain
6160 backwards compatible. Also added extra_local_interfaces.
6162 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6163 to bomb out with an assertion failure - to the client this appears as a
6164 connection drop. This problem occurs in the part of the code that was taken
6165 from the Samba project. Fortunately, the assertion is in a very simple
6166 function, so I have fixed this by reproducing the function inline in the
6167 one place where it is called, and arranging for authentication to fail
6168 instead of killing the process with assert().
6170 75. The SPA client code was not working when the server requested OEM rather
6171 than Unicode encoding.
6173 76. Added code to make require_files with a specific uid setting more usable in
6174 the case where statting the file as root fails - usually a non-root-mounted
6175 NFS file system. When this happens and the failure is EACCES, Exim now
6176 forks a subprocess and does the per-uid checking as the relevant uid.
6178 77. Added process_log_path.
6180 78. If log_file_path was not explicitly set, a setting of check_log_space or
6181 check_log_inodes was ignored.
6183 79. If a space check for the spool or log partitions fails, the incident is now
6184 logged. Of course, in the latter case the data may get lost...
6186 80. Added the %p formatting code to string_format() so that it can be used to
6187 print addresses in debug_print(). Adjusted all the address printing in the
6188 debugging in store.c to use %p rather than %d.
6190 81. There was a concern that a line of code in smtp_in.c could overflow a
6191 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6192 initially expressed, the concern was not well-founded, because trailing
6193 spaces are removed early. However, if the trailing spaces were followed by
6194 a NULL, they did not get removed, so the overflow was possible. Two fixes
6197 (a) I re-wrote the offending code in a cleaner fashion.
6198 (b) If an incoming SMTP command contains a NULL character, it is rejected
6201 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6202 runs initgroups(), so that if the Exim user is in any additional groups,
6203 they will be used during message reception.
6209 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob