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18 EXPERIMENTAL_CERTNAMES is withdrawn.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.
30 TL/01 When running the test suite, the README says that variables such as
31 no_msglog_check are global and can be placed anywhere in a specific
32 test's script, however it was observed that placement needed to be near
33 the beginning for it to behave that way. Changed the runtest perl
34 script to read through the entire script once to detect and set these
35 variables, reset to the beginning of the script, and then run through
36 the script parsing/test process like normal.
38 TL/02 The BSD's have an arc4random API. One of the functions to induce
39 adding randomness was arc4random_stir(), but it has been removed in
40 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
41 function when detected.
43 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
44 cause callback expansion.
46 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
47 syntax errors in an expansion can be treated as a string instead of
48 logging or causing an error, due to the internal use of bool_lax
49 instead of bool when processing it.
51 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
52 server certificates when making smtp deliveries.
54 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
56 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
58 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
60 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
61 Merged patch from Sebastian Wiedenroth.
63 JH/05 Fix results-pipe from transport process. Several recipients, combined
64 with certificate use, exposed issues where response data items split
65 over buffer boundaries were not parsed properly. This eventually
66 resulted in duplicates being sent. This issue only became common enough
67 to notice due to the introduction of conection certificate information,
68 the item size being so much larger. Found and fixed by Wolfgang Breyha.
70 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
71 size buffer was used, resulting in syntax errors when an expansion
74 JH/07 Add support for directories of certificates when compiled with a GnuTLS
75 version 3.3.6 or later.
77 JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef
78 is EXPERIMENTAL_EVENT, the main-configuration and transport options
79 both become "event_action", the variables become $event_name, $event_data
80 and $event_defer_errno. There is a new variable $verify_mode, usable in
81 routers, transports and related events. The tls:cert event is now also
82 raised for inbound connections, if the main configuration event_action
85 TL/06 In test suite, disable OCSP for old versions of openssl which contained
86 early OCSP support, but no stapling (appears to be less than 1.0.0).
88 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
89 server certificate names available under the smtp transport option
90 "tls_verify_cert_hostname" now do not permit multi-component wildcard
93 JH/10 Time-related extraction expansions from certificates now use the main
94 option "timezone" setting for output formatting, and are consistent
95 between OpenSSL and GnuTLS compilations. Bug 1541.
97 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
98 encoded parameter in the incoming message. Bug 1558.
100 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
101 include certificate info, eximon was claiming there were spoolfile
104 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
106 JH/14 Log delivery-related information more consistently, using the sequence
107 "H=<name> [<ip>]" wherever possible.
109 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
110 are problematic for Debian distribution, omit them from the release
113 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
115 JH/16 Fix string representation of time values on 64bit time_t anchitectures.
118 JH/17 Fix a null-indirection in certextract expansions when a nondefault
119 output list separator was used.
124 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
125 checkers that were complaining about end of non-void function with no
128 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
129 This was a regression intruduced in 4.83 by another bugfix.
131 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
133 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
134 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
140 TF/01 Correctly close the server side of TLS when forking for delivery.
142 When a message was received over SMTP with TLS, Exim failed to clear up
143 the incoming connection properly after forking off the child process to
144 deliver the message. In some situations the subsequent outgoing
145 delivery connection happened to have the same fd number as the incoming
146 connection previously had. Exim would try to use TLS and fail, logging
147 a "Bad file descriptor" error.
149 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
150 utilities have not been installed.
152 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
153 temporary space as the ACL may create new global variables.
155 TL/01 LDAP support uses per connection or global context settings, depending
156 upon the detected version of the libraries at build time.
158 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
159 to extract and use the src ip:port in logging and expansions as if it
160 were a direct connection from the outside internet. PPv2 support was
161 updated based on HAProxy spec change in May 2014.
163 JH/02 Add ${listextract {number}{list}{success}{fail}}.
165 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
166 Properly escape header and check for NULL return.
168 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
171 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
173 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
174 characters in header names, implemented as a verify condition.
175 Contributed by Michael Fischer v. Mollard.
177 TL/05 Rename SPF condition results err_perm and err_temp to standardized
178 results permerror and temperror. Previous values are deprecated but
179 still accepted. In a future release, err_perm and err_temp will be
180 completely removed, which will be a backward incompatibility if the
181 ACL tests for either of these two old results. Patch contributed by
182 user bes-internal on the mailing list.
184 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
186 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
187 selectors, in both main and reject logs.
189 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
192 JH/07 Add malware type "sock" for talking to simple daemon.
194 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
196 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
197 routers/transports under cutthrough routing.
199 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
200 numbers. Touch up "bool" conditional to keep the same definition.
202 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
204 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
206 JH/12 Expand items in router/transport headers_add or headers_remove lists
207 individually rather than the list as a whole. Bug 1452.
209 Required for reasonable handling of multiple headers_ options when
210 they may be empty; requires that headers_remove items with embedded
211 colons must have them doubled (or the list-separator changed).
213 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
214 view the policy declared in the DMARC record. Currently, $dmarc_status
215 is a combined value of both the record presence and the result of the
218 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
220 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
221 dnslookup router and the smtp transport (applying to the forward
224 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
225 of ldap servers used for a specific lookup. Patch provided by Heiko
228 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
229 New variable $lookup_dnssec_authenticated for observability.
231 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
232 Patch submitted by Lars Timman.
234 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
236 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
237 Requires trusted mode and valid format message id, aborts otherwise.
238 Patch contributed by Heiko Schlichting.
240 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
241 certextract with support for various fields. Bug 1358.
243 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
244 is requested by default, modifiable by smtp transport option
247 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
248 operate on certificate variables to give certificate fingerprints
249 Also new ${sha256:cert_variable}.
251 JH/23 The PRDR feature is moved from being Experimental into the mainline.
253 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
254 Christian Aistleitner.
256 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
258 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
259 file. Patch from Wolfgang Breyha.
261 JH/25 Expand the coverage of the delivery $host and $host_address to
262 client authenticators run in verify callout. Bug 1476.
264 JH/26 Port service names are now accepted for tls_on_connect_ports, to
265 align with daemon_smtp_ports. Bug 72.
267 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
268 support and error reporting did not work properly.
270 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
271 and is readable. Patch from Andrew Colin Kissa.
273 TL/14 Enhance documentation of ${run expansion and how it parses the
274 commandline after expansion, particularly in the case when an
275 unquoted variable expansion results in an empty value.
277 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
279 PP/02 Fix internal collision of T_APL on systems which support RFC3123
280 by renaming away from it. Addresses GH issue 15, reported by
283 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
285 TL/15 SECURITY: prevent double expansion in math comparison functions
286 (can expand unsanitized data). Not remotely exploitable.
293 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
295 PP/02 Make -n do something, by making it not do something.
296 When combined with -bP, the name of an option is not output.
298 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
301 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
302 $sender_host_name and config options to manage this, and basic check
305 PP/05 DSCP support for outbound connections and control modifier for inbound.
307 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
308 (Only plugin which currently uses this is kerberos4, which nobody should
309 be using, but we should make it available and other future plugins might
310 conceivably use it, even though it would break NAT; stuff *should* be
311 using channel bindings instead).
313 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
314 name; added for Sendmail compatibility; requires admin caller.
315 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
316 just ignore it); requires trusted caller.
317 Also parse but ignore: -Ac -Am -X<logfile>
320 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
322 TL/02 Add +smtp_confirmation as a default logging option.
324 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
325 Patch by Magnus Holmgren from 2007-02-20.
327 TL/04 Bugzilla 1281 - Spec typo.
328 Bugzilla 1283 - Spec typo.
329 Bugzilla 1290 - Spec grammar fixes.
331 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
333 TL/06 Add Experimental DMARC support using libopendmarc libraries.
335 TL/07 Fix an out of order global option causing a segfault. Reported to dev
336 mailing list by by Dmitry Isaikin.
338 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
340 JH/02 Support "G" suffix to numbers in ${if comparisons.
342 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
344 NM/01 Bugzilla 1197 - Spec typo
345 Bugzilla 1196 - Spec examples corrections
347 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
349 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
350 gnutls_enable_pkcs11, but renamed to more accurately indicate its
353 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
354 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
356 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
357 "acl {{name}{arg}...}", and optional args on acl condition
360 JH/05 Permit multiple router/transport headers_add/remove lines.
362 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
364 JH/07 Avoid using a waiting database for a single-message-only transport.
365 Performance patch from Paul Fisher. Bugzilla 1262.
367 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
370 JH/09 Add $headers_added variable, with content from use of ACL modifier
371 add_header (but not yet added to the message). Bugzilla 199.
373 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
374 Pulled from Bugzilla 817 by Wolfgang Breyha.
376 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
378 (nb: this is the same fix as in Exim 4.80.1)
380 JH/11 Add A= logging on delivery lines, and a client_set_id option on
383 JH/12 Add optional authenticated_sender logging to A= and a log_selector
386 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
388 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
389 advertise SMTP AUTH mechanism to us, instead of a generic
390 protocol violation error. Also, make Exim more robust to bad
391 data from the Dovecot auth socket.
393 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
395 When a queue runner is handling a message, Exim first routes the
396 recipient addresses, during which it prunes them based on the retry
397 hints database. After that it attempts to deliver the message to
398 any remaining recipients. It then updates the hints database using
401 So if a recipient address works intermittently, it can get repeatedly
402 deferred at routing time. The retry hints record remains fresh so the
403 address never reaches the final cutoff time.
405 This is a fairly common occurrence when a user is bumping up against
406 their storage quota. Exim had some logic in its local delivery code
407 to deal with this. However it did not apply to per-recipient defers
408 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
410 This change adds a proper retry rule check during routing so that the
411 final cutoff time is checked against the message's age. We only do
412 this check if there is an address retry record and there is not a
413 domain retry record; this implies that previous attempts to handle
414 the address had the retry_use_local_parts option turned on. We use
415 this as an approximation for the destination being like a local
416 delivery, as in LMTP.
418 I suspect this new check makes the old local delivery cutoff check
419 redundant, but I have not verified this so I left the code in place.
421 TF/02 Correct gecos expansion when From: is a prefix of the username.
423 Test 0254 submits a message to Exim with the header
427 When I ran the test suite under the user fanf2, Exim expanded
428 the header to contain my full name, whereas it should have added
429 a Resent-Sender: header. It erroneously treats any prefix of the
430 username as equal to the username.
432 This change corrects that bug.
434 GF/01 DCC debug and logging tidyup
435 Error conditions log to paniclog rather than rejectlog.
436 Debug lines prefixed by "DCC: " to remove any ambiguity.
438 TF/03 Avoid unnecessary rebuilds of lookup-related code.
440 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
441 Bug spotted by Jeremy Harris; was flawed since initial commit.
442 Would have resulted in OCSP responses post-SNI triggering an Exim
443 NULL dereference and crash.
445 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
447 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
448 Bug detection, analysis and fix by Samuel Thibault.
449 Bugzilla 1331, Debian bug #698092.
451 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
453 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
454 Server implementation by Todd Lyons, client by JH.
455 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
456 config variable "prdr_enable" controls whether the server
457 advertises the facility. If the client requests PRDR a new
458 acl_data_smtp_prdr ACL is called once for each recipient, after
459 the body content is received and before the acl_smtp_data ACL.
460 The client is controlled by bolth of: a hosts_try_prdr option
461 on the smtp transport, and the server advertisement.
462 Default client logging of deliveries and rejections involving
463 PRDR are flagged with the string "PRDR".
465 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
466 fclose(). Diagnosis by Todd Lyons.
468 PP/17 Update configure.default to handle IPv6 localhost better.
469 Patch by Alain Williams (plus minor tweaks).
472 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
473 This is now consistent with GnuTLS, and is now documented: the
474 previous undocumented portable approach to treating the option as
475 unset was to force an expansion failure. That still works, and
476 an empty string is now equivalent.
478 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
479 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
480 not performing validation itself.
482 PP/20 Added force_command boolean option to pipe transport.
483 Patch from Nick Koston, of cPanel Inc.
485 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
488 TF/04 Added udpsend ACL modifer and hexquote expansion operator
490 PP/21 Fix eximon continuous updating with timestamped log-files.
491 Broken in a format-string cleanup in 4.80, missed when I repaired the
492 other false fix of the same issue.
493 Report and fix from Heiko Schlichting.
496 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
497 Report from Prashanth Katuri.
499 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
500 It's SecureTransport, so affects any MacOS clients which use the
501 system-integrated TLS libraries, including email clients.
503 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
504 using a MIME ACL for non-SMTP local injection.
505 Report and assistance in diagnosis by Warren Baker.
507 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
509 JH/16 Fix comparisons for 64b. Bugzilla 1385.
511 TL/09 Add expansion variable $authenticated_fail_id to keep track of
512 last id that failed so it may be referenced in subsequent ACL's.
514 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
517 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
518 ldap library initialization, allowing self-signed CA's to be
519 used. Also properly sets require_cert option later in code by
520 using NULL (global ldap config) instead of ldap handle (per
521 session). Bug diagnosis and testing by alxgomz.
523 TL/12 Enhanced documentation in the ratelimit.pl script provided in
524 the src/util/ subdirectory.
526 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
527 renamed to Transport Post Delivery Action by Jeremy Harris, as
530 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
531 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
532 redis_servers = needs to be configured which will be used by the redis
533 lookup. Patch from Warren Baker, of The Packet Hub.
535 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
537 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
538 hostname or reverse DNS when processing a host list. Used suggestions
539 from multiple comments on this bug.
541 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
543 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
544 Missed a few lines, added it to make the runtest require no keyboard
547 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
548 contains upper case chars. Make router use caseful_local_part.
550 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
551 support when GnuTLS has been built with p11-kit.
557 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
559 This, or similar/improved, will also be change PP/11 of 4.82.
565 PP/01 Handle short writes when writing local log-files.
566 In practice, only affects FreeBSD (8 onwards).
567 Bugzilla 1053, with thanks to Dmitry Isaikin.
569 NM/01 Bugzilla 949 - Documentation tweak
571 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
574 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
576 PP/02 Implemented gsasl authenticator.
578 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
580 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
581 `pkg-config foo` for cflags/libs.
583 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
584 with rest of GSASL and with heimdal_gssapi.
586 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
587 `pkg-config foo` for cflags/libs for the TLS implementation.
589 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
590 properties get this fed in as external SSF. A number of robustness
591 and debugging improvements to the cyrus_sasl authenticator.
593 PP/08 cyrus_sasl server now expands the server_realm option.
595 PP/09 Bugzilla 1214 - Log authentication information in reject log.
596 Patch by Jeremy Harris.
598 PP/10 Added dbmjz lookup type.
600 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
602 PP/12 MAIL args handles TAB as well as SP, for better interop with
603 non-compliant senders.
604 Analysis and variant patch by Todd Lyons.
606 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
607 Bug report from Lars Müller <lars@samba.org> (via SUSE),
608 Patch from Dirk Mueller <dmueller@suse.com>
610 PP/13 tls_peerdn now print-escaped for spool files.
611 Observed some $tls_peerdn in wild which contained \n, which resulted
612 in spool file corruption.
614 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
615 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
616 or write after TLS renegotiation, which otherwise led to messages
619 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
620 as a tracking header (ie: a signed header comes before the signature).
621 Patch from Wolfgang Breyha.
623 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
624 comma-sep list; embedded commas doubled.
626 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
628 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
630 Report and patch from Dmitry Banschikov.
632 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
633 Removed SSL_clear() after SSL_new() which led to protocol negotiation
634 failures. We appear to now support TLS1.1+ with Exim.
636 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
637 lets Exim select keys and certificates based upon TLS SNI from client.
638 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
639 before an outbound SMTP session. New log_selector, +tls_sni.
641 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
642 NULL dereference. Report and patch from Alun Jones.
644 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
645 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
646 Not seeing resolver debug output on NetBSD, but suspect this is a
647 resolver implementation change.
649 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
650 Left warnings. Added "eximon gdb" invocation mode.
652 PP/21 Defaulting "accept_8bitmime" to true, not false.
654 PP/22 Added -bw for inetd wait mode support.
656 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
657 locate the relevant includes and libraries. Made this the default.
659 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
660 Bugzilla 1246, report and most of solution from Tomasz Kusy.
662 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
663 This may cause build issues on older platforms.
665 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
666 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
667 gnutls_require_mac & gnutls_require_protocols (no longer supported).
668 Added SNI support via GnuTLS too.
669 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
671 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
673 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
674 Applied second patch from Janne, implementing suggestion to default
675 multiple-strings-in-record handling to match SPF spec.
677 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
679 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
680 read-only, out of scope).
681 Patch from Wolfgang Breyha, report from Stuart Northfield.
683 PP/29 Fix three issues highlighted by clang analyser static analysis.
684 Only crash-plausible issue would require the Cambridge-specific
685 iplookup router and a misconfiguration.
686 Report from Marcin Mirosław.
688 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
690 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
691 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
692 As part of this, removing so much warning spew let me fix some minor
693 real issues in debug logging.
695 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
696 assignment on my part. Fixed.
698 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
699 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
700 Janne Snabb (who went above and beyond: thank you).
702 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
703 string otherwise requires a connection and a bunch more work and it's
704 relatively easy to get wrong. Should also expose TLS library linkage
707 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
708 64-bit ${eval} (JH/03).
710 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
711 GNU libc to support some of the 64-bit stuff, should not lead to
712 conflicts. Defined before os.h is pulled in, so if a given platform
713 needs to override this, it can.
715 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
716 protection layer was required, which is not implemented.
717 Bugzilla 1254, patch from Wolfgang Breyha.
719 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
720 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
721 tls_dhparam take prime identifiers. Also unbreak combination of
722 OpenSSL+DH_params+TLSSNI.
724 PP/39 Disable SSLv2 by default in OpenSSL support.
730 PP/01 Solaris build fix for Oracle's LDAP libraries.
731 Bugzilla 1109, patch from Stephen Usher.
733 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
735 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
738 TF/02 Fix a couple more cases where we did not log the error message
739 when unlink() failed. See also change 4.74-TF/03.
741 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
742 lock up or crash if it happened to be inside a call to libc when it
743 got a SIGUSR1 from exiwhat.
745 The SIGUSR1 handler appends the current process status to the process
746 log which is later printed by exiwhat. It used to use the general
747 purpose logging code to do this, but several functions it calls are
748 not safe for signals.
750 The new output code in the SIGUSR1 handler is specific to the process
751 log, and simple enough that it's easy to inspect for signal safety.
752 Removing some special cases also simplifies the general logging code.
753 Removing the spurious timestamps from the process log simplifies
756 TF/04 Improved ratelimit ACL condition.
758 The /noupdate option has been deprecated in favour of /readonly which
759 has clearer semantics. The /leaky, /strict, and /readonly update modes
760 are mutually exclusive. The update mode is no longer included in the
761 database key; it just determines when the database is updated. (This
762 means that when you upgrde Exim will forget old rate measurements.)
764 Exim now checks that the per_* options are used with an update mode that
765 makes sense for the current ACL. For example, when Exim is processing a
766 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
767 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
768 must specify per_mail/readonly. If you omit the update mode it defaults to
769 /leaky where that makes sense (as before) or /readonly where required.
771 The /noupdate option is now undocumented but still supported for
772 backwards compatibility. It is equivalent to /readonly except that in
773 ACLs where /readonly is required you may specify /leaky/noupdate or
774 /strict/noupdate which are treated the same as /readonly.
776 A useful new feature is the /count= option. This is a generalization
777 of the per_byte option, so that you can measure the throughput of other
778 aggregate values. For example, the per_byte option is now equivalent
779 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
781 The per_rcpt option has been generalized using the /count= mechanism
782 (though it's more complicated than the per_byte equivalence). When it is
783 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
784 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
785 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
786 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
787 Note that using per_rcpt with a non-readonly update mode in more than
788 one ACL will cause the recipients to be double-counted. (The per_mail
789 and per_byte options don't have this problem.)
791 The handling of very low rates has changed slightly. If the computed rate
792 is less than the event's count (usually one) then this event is the first
793 after a long gap. In this case the rate is set to the same as this event's
794 count, so that the first message of a spam run is counted properly.
796 The major new feature is a mechanism for counting the rate of unique
797 events. The new per_addr option counts the number of different
798 recipients that someone has sent messages to in the last time period. It
799 behaves like per_rcpt if all the recipient addresses are different, but
800 duplicate recipient addresses do not increase the measured rate. Like
801 the /count= option this is a general mechanism, so the per_addr option
802 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
803 example, measure the rate that a client uses different sender addresses
804 with the options per_mail/unique=$sender_address. There are further
805 details in the main documentation.
807 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
809 TF/06 Removed a few PCRE remnants.
811 TF/07 Automatically extract Exim's version number from tags in the git
812 repository when doing development or release builds.
814 PP/02 Raise smtp_cmd_buffer_size to 16kB.
815 Bugzilla 879. Patch from Paul Fisher.
817 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
818 Heavily based on revision 40f9a89a from Simon Arlott's tree.
821 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
823 PP/05 Variable $av_failed, true if the AV scanner deferred.
824 Bugzilla 1078. Patch from John Horne.
826 PP/06 Stop make process more reliably on build failure.
827 Bugzilla 1087. Patch from Heiko Schlittermann.
829 PP/07 Make maildir_use_size_file an _expandable_ boolean.
830 Bugzilla 1089. Patch from Heiko Schlittermann.
832 PP/08 Handle ${run} returning more data than OS pipe buffer size.
833 Bugzilla 1131. Patch from Holger Weiß.
835 PP/09 Handle IPv6 addresses with SPF.
836 Bugzilla 860. Patch from Wolfgang Breyha.
838 PP/10 GnuTLS: support TLS 1.2 & 1.1.
840 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
843 PP/11 match_* no longer expand right-hand-side by default.
844 New compile-time build option, EXPAND_LISTMATCH_RHS.
845 New expansion conditions, "inlist", "inlisti".
847 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
849 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
851 PP/14 fix log_write() format string regression from TF/03.
852 Bugzilla 1152. Patch from Dmitry Isaikin.
858 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
860 PP/02 Harmonised TLS library version reporting; only show if debugging.
861 Layout now matches that introduced for other libraries in 4.74 PP/03.
863 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
865 PP/04 New "dns_use_edns0" global option.
867 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
870 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
871 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
873 TK/01 Updated PolarSSL code to 0.14.2.
874 Bugzilla 1097. Patch from Andreas Metzler.
876 PP/07 Catch divide-by-zero in ${eval:...}.
879 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
882 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
883 format-string attack -- SECURITY: remote arbitrary code execution.
885 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
886 time unintentionally subject to list matching rules, letting the header
887 cause arbitrary Exim lookups (of items which can occur in lists, *not*
888 arbitrary string expansion). This allowed for information disclosure.
890 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
891 INT_MIN/-1 -- value coerced to INT_MAX.
897 NM/01 Workround for PCRE version dependency in version reporting
900 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
901 This fixes portability to compilers other than gcc, notably
902 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
904 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
905 makefiles for portability to HP-UX and POSIX correctness.
907 PP/01 Permit LOOKUP_foo enabling on the make command-line.
908 Also via indented variable definition in the Makefile.
909 (Debugging by Oliver Heesakkers).
911 PP/02 Restore caching of spamd results with expanded spamd_address.
912 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
914 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
915 Improves build reliability. Fix from: Frank Elsner
917 NM/02 Fix wide character breakage in the rfc2047 coding
918 Fixes bug 1064. Patch from Andrey N. Oktyabrski
920 NM/03 Allow underscore in dnslist lookups
921 Fixes bug 1026. Patch from Graeme Fowler
923 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
924 Code patches from Adam Ciarcinski of NetBSD.
926 NM/04 Fixed exiqgrep to cope with mailq missing size issue
929 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
930 is logged, to avoid truncation. Patch from John Horne.
932 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
933 Patch from Jakob Hirsch.
935 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
936 SQL string expansion failure details.
937 Patch from Andrey Oktyabrski.
939 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
940 Patch from Simon Arlott.
942 PP/09 New lookups functionality failed to compile on old gcc which rejects
943 extern declarations in function scope.
944 Patch from Oliver Fleischmann
946 PP/10 Use sig_atomic_t for flags set from signal handlers.
947 Check getgroups() return and improve debugging.
948 Fixed developed for diagnosis in bug 927 (which turned out to be
951 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
952 Patch from Mark Zealey.
954 PP/12 Bugzilla 1056: Improved spamd server selection.
955 Patch from Mark Zealey.
957 PP/13 Bugzilla 1086: Deal with maildir quota file races.
958 Based on patch from Heiko Schlittermann.
960 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
961 Patch from Uwe Doering, sign-off by Michael Haardt.
963 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
964 variable declaration deep within a block. Bug and patch from
967 PP/15 lookups-Makefile IRIX compatibilty coercion.
969 PP/16 Make DISABLE_DKIM build knob functional.
971 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
972 Patch by Simon Arlott
974 TF/03 Fix valgrind.h portability to C89 compilers that do not support
975 variable argument macros. Our copy now differs from upstream.
981 TF/01 Failure to get a lock on a hints database can have serious
982 consequences so log it to the panic log.
984 TF/02 Log LMTP confirmation messages in the same way as SMTP,
985 controlled using the smtp_confirmation log selector.
987 TF/03 Include the error message when we fail to unlink a spool file.
989 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
990 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
991 for maintaining out-of-tree patches for some time.
993 PP/01 Bugzilla 139: Documentation and portability issues.
994 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
995 Handle per-OS dynamic-module compilation flags.
997 PP/02 Let /dev/null have normal permissions.
998 The 4.73 fixes were a little too stringent and complained about the
999 permissions on /dev/null. Exempt it from some checks.
1000 Reported by Andreas M. Kirchwitz.
1002 PP/03 Report version information for many libraries, including
1003 Exim version information for dynamically loaded libraries. Created
1004 version.h, now support a version extension string for distributors
1005 who patch heavily. Dynamic module ABI change.
1007 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1008 privilege escalation vulnerability whereby the Exim run-time user
1009 can cause root to append content of the attacker's choosing to
1012 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1015 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1016 If dropping privileges for untrusted macros, we disabled normal logging
1017 on the basis that it would fail; for the Exim run-time user, this is not
1018 the case, and it resulted in successful deliveries going unlogged.
1019 Fixed. Reported by Andreas Metzler.
1025 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1026 only prepend for the Resent-* case. Fixes regression introduced in
1027 Exim 4.70 by NM/22 for Bugzilla 607.
1029 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1030 increasing numbers of administrators be bitten by this.
1032 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1034 PP/03 Bugzilla 994: added openssl_options main configuration option.
1036 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1038 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1040 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1042 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1043 without a peer certificate, leading to a segfault because of an
1044 assumption that peers always have certificates. Be a little more
1045 paranoid. Problem reported by Martin Tscholak.
1047 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1048 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1049 NB: ClamAV planning to remove STREAM in "middle of 2010".
1050 CL also introduces -bmalware, various -d+acl logging additions and
1051 more caution in buffer sizes.
1053 PP/09 Implemented reverse_ip expansion operator.
1055 PP/10 Bugzilla 937: provide a "debug" ACL control.
1057 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1059 PP/12 Bugzilla 973: Implement --version.
1061 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1063 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1065 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1067 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1068 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1069 ignore trailing whitespace.
1071 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1073 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1076 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1077 Notification from Dr Andrew Aitchison.
1079 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1080 ExtendedDetectionInfo response format.
1081 Notification from John Horne.
1083 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1086 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1087 XSL and documented dependency on system catalogs, with examples of how
1090 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1093 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1094 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1095 configuration file which is writeable by the Exim user or group.
1097 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1098 of configuration files to cover files specified with the -C option if
1099 they are going to be used with root privileges, not just the default
1102 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1103 option (effectively making it always true).
1105 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1106 files to be used while preserving root privileges.
1108 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1109 that rogue child processes cannot use them.
1111 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1112 run-time user, instead of root.
1114 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1115 Exim run-time user without dropping privileges.
1117 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1118 result string, instead of calling string_vformat() twice with the same
1121 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1122 for other users. Others should always drop root privileges if they use
1123 -C on the command line, even for a whitelisted configure file.
1125 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1127 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1133 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1134 $data_path, and $header_path variables; fixed documentation bugs and
1137 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1138 exipick to access non-standard spools, including the "frozen" queue
1141 NM/01 Bugzilla 965: Support mysql stored procedures.
1142 Patch from Alain Williams
1144 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1146 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1147 Patch from Andreas Metzler
1149 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1150 Patch from Kirill Miazine
1152 NM/05 Bugzilla 671: Added umask to procmail example.
1154 JJ/03 installed exipick 20100323.0, fixing doc bug
1156 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1157 directory. Notification and patch from Dan Rosenberg.
1159 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1161 TK/02 Improve log output when DKIM signing operation fails.
1163 MH/01 Treat the transport option dkim_domain as a colon separated
1164 list, not as a single string, and sign the message with each element,
1165 omitting multiple occurences of the same signer.
1167 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1168 Bugzilla 985, 986. Patch by Simon Arlott
1170 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1171 Patch by Simon Arlott
1173 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1174 MBX locking. Notification from Dan Rosenberg.
1180 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1182 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1184 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1186 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1188 NM/04 Bugzilla 915: Flag broken perl installation during build.
1194 TK/01 Added patch by Johannes Berg that expands the main option
1195 "spamd_address" if it starts with a dollar sign.
1197 TK/02 Write list of recipients to X-Envelope-Sender header when building
1198 the mbox-format spool file for content scanning (suggested by Jakob
1201 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1202 (http://www.dcc-servers.net/) support via dccifd. Activated by
1203 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1205 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1206 by Mark Daniel Reidel <mr@df.eu>.
1208 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1209 When building exim an external PCRE library is now needed -
1210 PCRE is a system library on the majority of modern systems.
1211 See entry on PCRE_LIBS in EDITME file.
1213 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1214 conversation. Added nologin parameter to request.
1215 Patch contributed by Kirill Miazine.
1217 TF/01 Do not log submission mode rewrites if they do not change the address.
1219 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1221 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1222 log files in place. Contributed by Roberto Lima.
1224 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1226 TF/03 Bugzilla 615: When checking the local_parts router precondition
1227 after a local_part_suffix or local_part_prefix option, Exim now
1228 does not use the address's named list lookup cache, since this
1229 contains cached lookups for the whole local part.
1231 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1232 Robert Millan. Documentation is in experimental-spec.txt.
1234 TF/04 Bugzilla 668: Fix parallel build (make -j).
1236 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1238 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1239 Patch provided by Jan Srzednicki.
1241 TF/05 Leading white space used to be stripped from $spam_report which
1242 wrecked the formatting. Now it is preserved.
1244 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1245 that they are available at delivery time.
1247 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1249 TF/08 TLS error reporting now respects the incoming_interface and
1250 incoming_port log selectors.
1252 TF/09 Produce a more useful error message if an SMTP transport's hosts
1253 setting expands to an empty string.
1255 NM/06 Bugzilla 744: EXPN did not work under TLS.
1256 Patch provided by Phil Pennock.
1258 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1259 Patch provided by Richard Godbee.
1261 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1262 acl_smtp_notquit, added index entry.
1264 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1265 Patch provided by Eugene Bujak.
1267 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1268 accept(). Patch provided by Maxim Dounin.
1270 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1271 Patch provided by Phil Pennock.
1273 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1275 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1276 Patch provided by Brad "anomie" Jorsch.
1278 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1279 Patch provided by Dean Brooks.
1281 TK/05 Add native DKIM support (does not depend on external libraries).
1283 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1284 Patch provided by Graeme Fowler.
1286 NM/16 Bugzilla 851: Documentation example syntax fix.
1288 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1290 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1293 NM/19 Bugzilla 745: TLS version reporting.
1294 Patch provided by Phil Pennock.
1296 NM/20 Bugzilla 167: bool: condition support.
1297 Patch provided by Phil Pennock.
1299 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1300 clients. Patch provided by Phil Pennock.
1302 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1303 Patch provided by Brad "anomie" Jorsch.
1305 NM/23 Bugzilla 687: Fix misparses in eximstats.
1306 Patch provided by Heiko Schlittermann.
1308 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1309 Patch provided by Heiko Schlittermann.
1311 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1312 plus update to original patch.
1314 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1316 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1317 Patch provided by David Brownlee.
1319 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1321 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1323 NM/30 Bugzilla 888: TLS documentation bugfixes.
1325 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1327 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1328 Unlike the original bugzilla I have changed all shell scripts in src tree.
1330 NM/33 Bugzilla 898: Transport filter timeout fix.
1331 Patch by Todd Rinaldo.
1333 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1334 Patch by Serge Demonchaux.
1336 NM/35 Bugzilla 39: Base64 decode bug fixes.
1337 Patch by Jakob Hirsch.
1339 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1341 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1343 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1345 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1351 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1352 ALT-N's libdkim that I have put here:
1353 http://duncanthrax.net/exim-experimental/
1355 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1356 were called 'true' and it seems that C99 defines that as a reserved
1357 keyword to be used with 'bool' variable types. That means you could
1358 not include C99-style headers which use bools without triggering
1359 build errors in sieve.c.
1361 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1362 as mailq or other aliases. Changed the --help handling significantly
1363 to do whats expected. exim_usage() emits usage/help information.
1365 SC/01 Added the -bylocaldomain option to eximstats.
1367 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1369 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1371 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1377 PH/01 Another patch from the Sieve maintainer.
1379 PH/02 When an IPv6 address is converted to a string for single-key lookup
1380 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1381 dots are used instead of colons so that keys in lsearch files need not
1382 contain colons. This was done some time before quoting was made available
1383 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1384 (notated using the quote facility) so as to distinguish them from IPv4
1385 keys. This meant that lookups for IP addresses in host lists did not work
1386 for iplsearch lookups.
1388 This has been fixed by arranging for IPv6 addresses to be expressed with
1389 colons if the lookup type is iplsearch. This is not incompatible, because
1390 previously such lookups could never work.
1392 The situation is now rather anomolous, since one *can* have colons in
1393 ordinary lsearch keys. However, making the change in all cases is
1394 incompatible and would probably break a number of configurations.
1396 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1399 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1400 conversion specification without a maximum field width, thereby enabling
1401 a rogue spamd server to cause a buffer overflow. While nobody in their
1402 right mind would setup Exim to query an untrusted spamd server, an
1403 attacker that gains access to a server running spamd could potentially
1404 exploit this vulnerability to run arbitrary code as the Exim user.
1406 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1407 $primary_hostname instead of what libspf2 thinks the hosts name is.
1409 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1410 a directory entry by the name of the lookup key. Previously, if a
1411 symlink pointed to a non-existing file or a file in a directory that
1412 Exim lacked permissions to read, a lookup for a key matching that
1413 symlink would fail. Now it is enough that a matching directory entry
1414 exists, symlink or not. (Bugzilla 503.)
1416 PH/03 The body_linecount and body_zerocount variables are now exported in the
1419 PH/04 Added the $dnslist_matched variable.
1421 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1422 This means they are set thereafter only if the connection becomes
1425 PH/06 Added the client_condition to authenticators so that some can be skipped
1426 by clients under certain conditions.
1428 PH/07 The error message for a badly-placed control=no_multiline_responses left
1429 "_responses" off the end of the name.
1431 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1433 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1434 (without spaces) instead of just copying the configuration text.
1436 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1438 PH/11 Added $max_received_linelength.
1440 PH/12 Added +ignore_defer and +include_defer to host lists.
1442 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1443 way in which PCRE > 7.0 is built.
1445 PH/14 Implemented queue_only_load_latch.
1447 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1448 MAIL command. The effect was to mangle the value on 64-bit systems.
1450 PH/16 Another patch from the Sieve maintainer.
1452 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1454 PH/18 If a system quota error occurred while trying to create the file for
1455 a maildir delivery, the message "Mailbox is full" was not appended to the
1456 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1457 only to a quota excession during the actual writing of the file.
1459 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1460 characters?) which causes problems in log lines. The DN values are now
1461 passed through string_printing() before being added to log lines.
1463 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1464 and InterBase are left for another time.)
1466 PH/21 Added message_body_newlines option.
1468 PH/22 Guard against possible overflow in moan_check_errorcopy().
1470 PH/23 POSIX allows open() to be a macro; guard against that.
1472 PH/24 If the recipient of an error message contained an @ in the local part
1473 (suitably quoted, of course), incorrect values were put in $domain and
1474 $local_part during the evaluation of errors_copy.
1480 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1481 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1484 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1485 issue a MAIL command.
1487 PH/02 In an ACL statement such as
1489 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1491 if a client was not listed at all, or was listed with a value other than
1492 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1493 the condition was not true (as it should be), so access was not denied.
1494 The bug was that the ! inversion was incorrectly passed on to the second
1495 item. This has been fixed.
1497 PH/03 Added additional dnslists conditions == and =& which are different from
1498 = and & when the dns lookup returns more than one IP address.
1500 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1501 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1503 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1504 FSYNC, which compiles an option called disable_fsync that allows for
1505 bypassing fsync(). The documentation is heavily laced with warnings.
1507 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1509 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1510 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1511 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1512 including adding "make clean"; (3) Added -fPIC when compiling the test
1513 dynamically loaded module, to get rid of a warning.
1515 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1516 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1517 = 0s. The bug is otherwise harmless.
1519 PH/07 There was a bug in the dovecot authenticator such that the value of
1520 $auth1 could be overwritten, and so not correctly preserved, after a
1521 successful authentication. This usually meant that the value preserved by
1522 the server_setid option was incorrect.
1524 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1526 PH/09 Installed PCRE release 7.0.
1528 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1529 run for batched SMTP input. It is now run at the start of every message
1530 in the batch. While fixing this I discovered that the process information
1531 (output by running exiwhat) was not always getting set for -bs and -bS
1532 input. This is fixed, and it now also says "batched" for BSMTP.
1534 PH/11 Added control=no_pipelining.
1536 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1537 patch, slightly modified), and move the expansion of helo_data till after
1538 the connection is made in the smtp transport (so it can use these
1541 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1543 PH/14 Added log_selector = +pid.
1545 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1547 PH/16 Add ${if forany and ${if forall.
1549 PH/17 Added dsn_from option to vary the From: line in DSNs.
1551 PH/18 Flush SMTP output before performing a callout, unless control =
1552 no_callout_flush is set.
1554 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1555 was true (the default) a successful delivery failed to delete the retry
1556 item, thus causing premature timeout of the address. The bug is now
1559 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1561 PH/21 Long custom messages for fakedefer and fakereject are now split up
1562 into multiline reponses in the same way that messages for "deny" and
1563 other ACL rejections are.
1565 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1566 with slight modification.
1568 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1569 draft, changing the syntax and factoring some duplicate code".
1571 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1572 for deliveries of the second and subsequent messages over the same SMTP
1575 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1576 ${reduce, with only minor "tidies".
1578 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1580 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1581 expansion side effects.
1583 PH/27 When a message times out after an over-quota error from an Exim-imposed
1584 quota, the bounce message says "mailbox is full". This message was not
1585 being given when it was a system quota that was exceeded. It now should
1588 MH/03 Made $recipients available in local_scan(). local_scan() already has
1589 better access to the recipient list through recipients_list[], but
1590 $recipients can be useful in postmaster-provided expansion strings.
1592 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1593 in the case of a MAIL command with additional options following the
1594 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1595 were accidentally chopped off.
1597 PH/29 SMTP synchronization checks are implemented when a command is read -
1598 there is a check that no more input is waiting when there shouldn't be
1599 any. However, for some commands, a delay in an ACL can mean that it is
1600 some time before the response is written. In this time, more input might
1601 arrive, invalidly. So now there are extra checks after an ACL has run for
1602 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1603 pipelining has not been advertised.
1605 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1607 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1608 returned in the SMTP response when smtp_return_error_details was false.
1609 This has been fixed.
1611 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1612 instead of the C I/O that was originally supplied, because problems were
1613 reported on Solaris.
1615 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1616 Exim which did not show up earlier: it was assuming that a call to
1617 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1618 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1619 was a macro that became an assignment, so it seemed to work. This has
1620 changed to a proper function call with a void return, hence the compile
1621 error. Exim's code has been fixed.
1623 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1626 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1628 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1630 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1631 because it turns out to be too big or there is a timeout) there is no
1632 "Completed" line in the log. When some messages of this type were
1633 selected by exigrep, they were listed as "not completed". Others were
1634 picked up by some special patterns. I have improved the selection
1635 criteria to be more general.
1637 PH/38 The host_find_failed option in the manualroute router can now be set
1638 to "ignore", to completely ignore a host whose IP address cannot be
1639 found. If all hosts are ignored, the behaviour is controlled by the new
1640 host_all_ignored option.
1642 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1643 homing or because of multiple MX records with /mx) generated more than
1644 one IP address, and the following item turned out to be the local host,
1645 all the secondary addresses of the first item were incorrectly removed
1646 from the list, along with the local host and any following hosts (which
1647 is what is supposed to happen).
1649 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1650 whoever called Exim into the -H file. In the case of the daemon it was
1651 behaving confusingly. When first started, it used values for whoever
1652 started the daemon, but after a SIGHUP it used the Exim user (because it
1653 calls itself on a restart). I have changed the code so that it now always
1656 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1657 message are rejected with the same error (e.g. no authentication or bad
1658 sender address), and a DATA command is nevertheless sent (as can happen
1659 with PIPELINING or a stupid MUA), the error message that was given to the
1660 RCPT commands is included in the rejection of the DATA command. This is
1661 intended to be helpful for MUAs that show only the final error to their
1664 PH/42 Another patch from the Sieve maintainer.
1666 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1667 Eximstats - Fixed some broken HTML links and added missing column headers
1669 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1670 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1672 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1674 PH/43 Yet another patch from the Sieve maintainer.
1676 PH/44 I found a way to check for a TCP/IP connection going away before sending
1677 the response to the final '.' that terminates a message, but only in the
1678 case where the client has not sent further data following the '.'
1679 (unfortunately, this is allowed). However, in many cases there won't be
1680 any further data because there won't be any more messages to send. A call
1681 to select() can be used: if it shows that the input is "ready", there is
1682 either input waiting, or the socket has been closed. An attempt to read
1683 the next input character can distinguish the two cases. Previously, Exim
1684 would have sent an OK response which the client would never have see.
1685 This could lead to message repetition. This fix should cure that, at
1686 least in a lot of common cases.
1688 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1689 advertised in response to EHLO.
1695 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1696 fixed by 4.65/MH/01 (is this a record?) are fixed:
1698 (i) An empty string was always treated as zero by the numeric comparison
1699 operators. This behaviour has been restored.
1701 (ii) It is documented that the numeric comparison operators always treat
1702 their arguments as decimal numbers. This was broken in that numbers
1703 starting with 0 were being interpreted as octal.
1705 While fixing these problems I realized that there was another issue that
1706 hadn't been noticed. Values of message_size_limit (both the global option
1707 and the transport option) were treated as octal if they started with 0.
1708 The documentation was vague. These values are now always treated as
1709 decimal, and I will make that clear in the documentation.
1715 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1716 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1719 MH/01 Don't check that the operands of numeric comparison operators are
1720 integers when their expansion is in "skipping" mode (fixes bug
1721 introduced by 4.64-PH/07).
1723 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1724 child addresses, Exim now panics and dies. Previously, because the count
1725 is held in a short int, deliveries were likely to be lost. As such a
1726 large number of recipients for a single message is ridiculous
1727 (performance will be very, very poor), I have chosen to impose a limit
1728 rather than extend the field.
1734 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1735 leftover -K file (the existence of which was triggered by #402).
1736 While we were at it, introduced process PID as part of the -K
1737 filename. This should rule out race conditions when creating
1740 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1741 processing considerably. Previous code took too long for large mails,
1742 triggering a timeout which in turn triggers #401.
1744 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1745 in the DK code in transports.c. sendfile() is not really portable,
1746 hence the _LINUX specificness.
1748 TF/01 In the add_headers option to the mail command in an Exim filter,
1749 there was a bug that Exim would claim a syntax error in any
1750 header after the first one which had an odd number of characters
1753 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1754 callout verification, Exim cached a "reject" for the entire domain. This
1755 is correct for most verifications, but it is not correct for a recipient
1756 verification with use_sender or use_postmaster set, because in that case
1757 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1758 case of MAIL FROM:<> rejection from other early rejections (e.g.
1759 rejection of HELO). When verifying a recipient using a non-null MAIL
1760 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1761 Whatever the result of the callout, the value of the domain cache is
1762 left unchanged (for any other kind of callout, getting as far as trying
1763 RCPT means that the domain itself is ok).
1765 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1768 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1769 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1770 session, the daemon ignores ECONNECT errors and logs others; it now
1771 ignores EPIPE as well.
1773 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1774 (quoted-printable decoding).
1776 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1777 later the small subsequent patch to fix an introduced bug.
1779 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1781 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1783 PH/08 An error is now given if message_size_limit is specified negative.
1785 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1786 to be given (somewhat) arbitrary names.
1788 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1791 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1792 miscellaneous code fixes
1794 PH/10 Added the log_reject_target ACL modifier to specify where to log
1797 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1798 hostname. This is wrong, because it relates to the incoming message (and
1799 probably the interface on which it is arriving) and not to the outgoing
1800 callout (which could be using a different interface). This has been
1801 changed to use the value of the helo_data option from the smtp transport
1802 instead - this is what is used when a message is actually being sent. If
1803 there is no remote transport (possible with a router that sets up host
1804 addresses), $smtp_active_hostname is used.
1806 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1807 tweaks were necessary in order to get it to work (see also 21 below):
1808 (a) The code assumed that strncpy() returns a negative number on buffer
1809 overflow, which isn't the case. Replaced with Exim's string_format()
1811 (b) There were several signed/unsigned issues. I just did the minimum
1812 hacking in of casts. There is scope for a larger refactoring.
1813 (c) The code used strcasecmp() which is not a standard C function.
1814 Replaced with Exim's strcmpic() function.
1815 (d) The code set only $1; it now sets $auth1 as well.
1816 (e) A simple test gave the error "authentication client didn't specify
1817 service in request". It would seem that Dovecot has changed its
1818 interface. Fortunately there's a specification; I followed it and
1819 changed what the client sends and it appears to be working now.
1821 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1824 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1825 address A is aliased to B and C, where B exists and C does not. Without
1826 -v the output is "A verified" because verification stops after a
1827 successful redirection if more than one address is generated. However,
1828 with -v the child addresses are also verified. Exim was outputting "A
1829 failed to verify" and then showing the successful verification for C,
1830 with its parentage. It now outputs "B failed to verify", showing B's
1831 parentage before showing the successful verification of C.
1833 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1834 look up a TXT record in a specific list after matching in a combined
1837 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1838 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1839 they consult the DNS. I had assumed they would set it the way they
1840 wanted; and indeed my experiments on Linux seem to show that in some
1841 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1842 To be on the safe side, however, I have now made the interface to
1843 host_find_byname() similar to host_find_bydns(), with an argument
1844 containing the DNS resolver options. The host_find_byname() function now
1845 sets these options at its start, just as host_find_bydns() does. The smtp
1846 transport options dns_qualify_single and dns_search_parents are passed to
1847 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1848 of host_find_byname() use the default settings of RES_DEFNAMES
1849 (qualify_single) but not RES_DNSRCH (search_parents).
1851 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1852 spool_read_header() do less string testing, by means of a preliminary
1853 switch on the second character of optional "-foo" lines. (This is
1854 overdue, caused by the large number of possibilities that now exist.
1855 Originally there were few.) While I was there, I also converted the
1856 str(n)cmp tests so they don't re-test the leading "-" and the first
1857 character, in the hope this might squeeze out yet more improvement.
1859 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1860 flag allowing group syntax was set by the header_syntax check but not
1861 turned off, possible causing trouble later; (2) The flag was not being
1862 set at all for the header_verify test, causing "group"-style headers to
1863 be rejected. I have now set it in this case, and also caused header_
1864 verify to ignore an empty address taken from a group. While doing this, I
1865 came across some other cases where the code for allowing group syntax
1866 while scanning a header line wasn't quite right (mostly, not resetting
1867 the flag correctly in the right place). These bugs could have caused
1868 trouble for malformed header lines. I hope it is now all correct.
1870 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1871 with the "reply" argument non-NULL. The code, however (which originally
1872 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1873 but it didn't always do it. This confused somebody who was copying the
1874 code for some other use. I have removed all the tests.
1876 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1877 feature that was used to support insecure browsers during the U.S. crypto
1878 embargo. It requires special client support, and Exim is probably the
1879 only MTA that supported it -- and would never use it because real RSA is
1880 always available. This code has been removed, because it had the bad
1881 effect of slowing Exim down by computing (never used) parameters for the
1882 RSA_EXPORT functionality.
1884 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1885 authenticator to fail if there's a tab character in the incoming data
1886 (there should never be unless someone is messing about, as it's supposed
1887 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1888 if the connection is using TLS or if the remote IP is the same as the
1889 local IP, and the "valid-client-cert option" if a client certificate has
1892 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1893 authenticators. This can be used for authorization after authentication
1894 succeeds. (In the case of plaintext, it servers for both authentication
1897 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1898 if any retry times were supplied.
1900 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1901 connection, where there is no client IP address to check. In this
1902 situation, the verify now always succeeds.
1904 PH/25 Applied John Jetmore's -Mset patch.
1906 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1908 PH/27 In a string expansion for a processed (not raw) header when multiple
1909 headers of the same name were present, leading whitespace was being
1910 removed from all of them, but trailing whitespace was being removed only
1911 from the last one. Now trailing whitespace is removed from each header
1912 before concatenation. Completely empty headers in a concatenation (as
1913 before) are ignored.
1915 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1916 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1918 PH/29 [Removed. This was a change that I later backed out, and forgot to
1919 correct the ChangeLog entry (that I had efficiently created) before
1920 committing the later change.]
1922 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1923 address errors (4xx response to RCPT) over the same connection as other
1924 messages routed to the same hosts. Such deliveries are always "forced",
1925 so retry times are not inspected. This resulted in far too many retries
1926 for the affected addresses. The effect occurred only when there were more
1927 hosts than the hosts_max_try setting in the smtp transport when it had
1928 the 4xx errors. Those hosts that it had tried were not added to the list
1929 of hosts for which the message was waiting, so if all were tried, there
1930 was no problem. Two fixes have been applied:
1932 (i) If there are any address or message errors in an SMTP delivery, none
1933 of the hosts (tried or untried) are now added to the list of hosts
1934 for which the message is waiting, so the message should not be a
1935 candidate for sending over the same connection that was used for a
1936 successful delivery of some other message. This seems entirely
1937 reasonable: after all the message is NOT "waiting for some host".
1938 This is so "obvious" that I'm not sure why it wasn't done
1939 previously. Hope I haven't missed anything, but it can't do any
1940 harm, as the worst effect is to miss an optimization.
1942 (ii) If, despite (i), such a delivery is accidentally attempted, the
1943 routing retry time is respected, so at least it doesn't keep
1944 hammering the server.
1946 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1947 in ${readsocket because some servers need this prod.
1949 PH/32 Added some extra debug output when updating a wait-xxx database.
1951 PH/33 The hint "could be header name not terminated by colon", which has been
1952 given for certain expansion errors for a long time, was not being given
1953 for the ${if def:h_colon_omitted{... case.
1955 PH/34 The spec says: "With one important exception, whenever a domain list is
1956 being scanned, $domain contains the subject domain." There was at least
1957 one case where this was not true.
1959 PH/35 The error "getsockname() failed: connection reset by peer" was being
1960 written to the panic log as well as the main log, but it isn't really
1961 panic-worthy as it just means the connection died rather early on. I have
1962 removed the panic log writing for the ECONNRESET error when getsockname()
1965 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1966 runs only) independently of the message's sender address. This meant
1967 that, if the 4xx error was in fact related to the sender, a different
1968 message to the same recipient with a different sender could confuse
1969 things. In particualar, this can happen when sending to a greylisting
1970 server, but other circumstances could also provoke similar problems.
1971 I have changed the default so that the retry time for these errors is now
1972 based a combination of the sender and recipient addresses. This change
1973 can be overridden by setting address_retry_include_sender=false in the
1976 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1977 remote server are returned as part of bounce messages. This was not
1978 happening for LMTP over a pipe (the lmtp transport), but now it is the
1979 same for both kinds of LMTP.
1981 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1982 in header lines that were in fact CNAMEs. This is no longer the case.
1984 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1985 and queue runs started by the daemon processed all messages. This has
1986 been fixed so that -R and -S can now usefully be given with -q<time>.
1988 PH/40 Import PCRE release 6.7 (fixes some bugs).
1990 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1992 PH/42 Give an error if -q is specified more than once.
1994 PH/43 Renamed the variables $interface_address and $interface_port as
1995 $received_ip_address and $received_port, to make it clear that these
1996 values apply to message reception, and not to the outgoing interface when
1997 a message is delivered. (The old names remain recognized, of course.)
1999 PH/44 There was no timeout on the connect() call when using a Unix domain
2000 socket in the ${readsocket expansion. There now is.
2002 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2003 be meaningful with "accept".
2005 SC/01 Eximstats V1.43
2006 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2008 SC/02 Eximstats V1.44
2009 Use a glob alias rather than an array ref in the generated
2010 parser. This improves both readability and performance.
2012 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2013 Collect SpamAssassin and rejection statistics.
2014 Don't display local sender or destination tables unless
2015 there is data to show.
2016 Added average volumes into the top table text output.
2018 SC/04 Eximstats V1.46
2019 Collect data on the number of addresses (recipients)
2020 as well as the number of messages.
2022 SC/05 Eximstats V1.47
2023 Added 'Message too big' to the list of mail rejection
2024 reasons (thanks to Marco Gaiarin).
2026 SC/06 Eximstats V1.48
2027 Mainlog lines which have GMT offsets and are too short to
2028 have a flag are now skipped.
2030 SC/07 Eximstats V1.49 (Alain Williams)
2031 Added the -emptyok flag.
2033 SC/08 Eximstats V1.50
2034 Fixes for obtaining the IP address from reject messages.
2036 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2037 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2038 whitesspace changes from 4.64-PH/27
2040 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2043 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2044 are found, allow negative numbers in numeric criteria)
2046 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2048 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2049 to match changes made in 4.64-PH/43
2051 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2053 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2054 "domain" is actually an IP address, and force a failure. This locks out
2055 those revolvers/nameservers that support "A-for-A" lookups, in
2056 contravention of the specifications.
2058 PH/48 When a host name was looked up from an IP address, and the subsequent
2059 forward lookup of the name timed out, the host name was left in
2060 $sender_host_name, contrary to the specification.
2062 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2063 restricted to single-key lookups, Exim was not diagnosing an error if
2064 * or *@ was used with a query-style lookup.
2066 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2068 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2069 long ago, but noone interested enough thought of it. Let's just say that
2070 the "1.1" means that there are some new functions that weren't there at
2071 some point in the past.
2073 PH/51 Error processing for expansion failure of helo_data from an smtp
2074 transport during callout processing was broken.
2076 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2077 tested/used via the -bh/-bhc/-bs options.
2079 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2080 bug, fixed in subsequent PCRE releases).
2082 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2083 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2085 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2091 SC/01 Use a glob alias rather than an array ref in eximstats generated
2092 parser. This improves both readability and performance.
2094 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2095 Don't display local sender or destination tables in eximstats unless
2096 there is data to show.
2097 Added average volumes into the eximstats top table text output.
2099 SC/03 Collect data on the number of addresses (recipients) as well
2100 as the number of messages in eximstats.
2102 TF/01 Correct an error in the documentation for the redirect router. Exim
2103 does (usually) call initgroups() when daemonizing.
2105 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2106 with consistent privilege compared to when running as a daemon.
2108 TF/03 Note in the spec that $authenticated_id is not set for local
2109 submissions from trusted users.
2111 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2112 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2114 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2115 by adding some example configuration directives to the default
2116 configuration file. A little bit of work is required to uncomment the
2117 directives and define how usernames and passwords are checked, but
2118 there is now a framework to start from.
2120 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2121 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2122 without this. I don't know how relevant this is to other LDAP libraries.
2124 PH/02 Add the verb name to the "unknown ACL verb" error.
2126 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2128 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2130 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2131 directory not expanded when it should be if an expanded home directory
2132 was set for the address (which is overridden by the transport).
2134 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2137 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2138 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2139 because it is too late at that time, and has no effect.
2141 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2142 security issue with \' (bugzilla #107). I could not use the
2143 PQescapeStringConn() function, because it needs a PGconn value as one of
2146 PH/08 When testing addresses using -bt, indicate those final addresses that
2147 are duplicates that would not cause an additional delivery. At least one
2148 person was confused, thinking that -bt output corresponded to deliveries.
2149 (Suppressing duplicates isn't a good idea as you lose the information
2150 about possibly different redirections that led to the duplicates.)
2152 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2153 systems where poll() doesn't work, in particular OS X.
2155 PH/10 Added more information to debugging output for retry time not reached.
2157 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2158 operations in malware.c.
2160 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2163 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2164 syslog_duplication set false, log lines that would normally be written
2165 both the the main log and to the reject log were not written to syslog at
2168 PH/14 In the default configuration, change the use of "message" in ACL warn
2169 statements to "add_header".
2171 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2172 not followed by a command (e.g. "seen endif").
2174 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2175 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2178 PH/17 Added extra conditions to the default value of delay_warning_condition
2182 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2183 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2184 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2187 The Auto-Submitted: and various List- headers are standardised, whereas I
2188 don't think Precedence: ever was.
2190 PH/18 Refactored debugging code in route_finduser() to show more information,
2191 in particular, the error code if getpwnam() issues one.
2193 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2194 This is apparently needed in addition to the PH/07 change above to avoid
2195 any possible encoding problems.
2197 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2198 but not after initializing Perl.
2200 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2201 output them only if debugging. By default they are written stderr,
2202 apparently, which is not desirable.
2204 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2207 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2210 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2212 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2213 authenticated or an ident call has been made. Suppress the default
2214 values for $authenticated_id and $authenticated_sender (but permit -oMai
2215 and -oMas) when testing with -bh.
2217 PH/24 Re-jigged the order of the tests in the default configuration so that the
2218 tests for valid domains and recipients precede the DNS black list and CSA
2219 tests, on the grounds that those ones are more expensive.
2221 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2222 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2223 This bug exists in every version of Exim that I still have, right back to
2226 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2227 However, an attempt to turn on case-sensitivity in a regex key by
2228 including (?-i) didn't work because the subject string was already
2229 lowercased, and the effects were non-intuitive. It turns out that a
2230 one-line patch can be used to allow (?-i) to work as expected.
2236 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2237 other effects) broke the use of negated acl sub-conditions.
2239 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2242 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2243 "Deny" causes Exim to reject the incoming connection with a 554 error.
2244 Unfortunately, if there is a major crisis, such as a disk failure,
2245 tcp-wrappers gives "deny", whereas what one would like would be some
2246 kind of temporary error. A kludge has been added to help with this.
2247 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2248 554 error is used if errno is still zero or contains ENOENT (which occurs
2249 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2252 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2254 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2255 errors. Otherwise a message that provokes a temporary error (when other
2256 messages do not) can cause a whole host to time out.
2258 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2259 addresses were routed directly to files or pipes from a redirect router.
2260 File deliveries just didn't batch; pipe deliveries might have suffered
2263 PH/06 A failure to get a lock for a hints database would erroneously always say
2264 "Failed to get write lock", even when it was really a read lock.
2266 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2267 of 0600. This has been changed to use the value of the lockfile_mode
2268 option (which defaults to 0600).
2270 PH/08 Applied small patch from the Sieve maintainer.
2272 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2273 folder from quota calculations, a direct delivery into this folder messed
2274 up the contents of the maildirsize file. This was because the regex was
2275 used only to exclude .Trash (or whatever) when the size of the mailbox
2276 was calculated. There was no check that a delivery was happening into an
2277 excluded directory. This bug has been fixed by ignoring all quota
2278 processing for deliveries into excluded directories.
2280 PH/10 Added the maildirfolder_create_regex option to appendfile.
2286 PH/01 The code for finding all the local interface addresses on a FreeBSD
2287 system running IPv6 was broken. This may well have applied to all BSD
2288 systems, as well as to others that have similar system calls. The broken
2289 code found IPv4 interfaces correctly, but gave incorrect values for the
2290 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2291 that it would not match correctly against @[] and not recognize the IPv6
2294 PH/02 The ipliteral router was not recognizing addresses of the form user@
2295 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2297 PH/03 Added disable_ipv6.
2299 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2300 decoded form, because it is most often used to construct To: headers
2301 lines in autoreplies, and the decoded form may well be syntactically
2302 invalid. However, $reply_address has leading white space removed, and all
2303 newlines turned into spaces so that the autoreply transport does not
2306 PH/05 If group was specified without a user on a router, and no group or user
2307 was specified on a transport, the group from the router was ignored.
2309 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2310 for visible compile-time settings that can be used to change these
2311 numbers, for those that want even more. Backwards compatibility with old
2312 spool files has been maintained. However, going back to a previous Exim
2313 release will lost any variables that are in spool files.
2315 PH/07 Two small changes when running in the test harness: increase delay when
2316 passing a TCP/IP connection to a new process, in case the original
2317 process has to generate a bounce, and remove special handling of
2318 127.0.0.2 (sic), which is no longer necessary.
2320 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2321 be the same on different OS.
2323 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2326 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2327 whether --show-vars was specified or not
2329 JJ/02 exipick: Added support for new ACL variable spool format introduced
2332 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2333 syntactically invalid From: or Reply-to: line, and a filter used this to
2334 generate an autoreply, and therefore failed to obtain an address for the
2335 autoreply, Exim could try to deliver to a non-existent relative file
2336 name, causing unrelated and misleading errors. What now happens is that
2337 it logs this as a hard delivery error, but does not attempt to create a
2340 PH/11 The exinext utility has a -C option for testing purposes, but although
2341 the given file was scanned by exinext itself; it wasn't being passed on
2342 when Exim was called.
2344 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2345 an end-of-file indication when reading a command response.
2347 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2348 compiled. In many other places in Exim, IPv6 addresses are always
2349 recognized, so I have changed this. It also means that IPv4 domain
2350 literals of the form [IPV4:n.n.n.n] are now always recognized.
2352 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2353 used if the router is not running as root, for example, when verifying at
2354 ACL time, or when using -bh. The debugging output from this situation was
2355 non-existent - all you got was a failure to exec. I have made two
2358 (a) Failures to set uid/gid, the current directory, or a process leader
2359 in a subprocess such as that created by queryprogram now generate
2360 suitable debugging ouput when -d is set.
2362 (b) The queryprogram router detects when it is not running as root,
2363 outputs suitable debugging information if -d is set, and then runs
2364 the subprocess without attempting to change uid/gid.
2366 PH/15 Minor change to Makefile for building test_host (undocumented testing
2369 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2370 additional section of a DNS packet that returns MX or SRV records.
2371 Instead, it always explicitly searches for A/AAAA records. This avoids
2372 major problems that occur when a DNS server includes only records of one
2373 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2374 fixed another bug: if SRV records were looked up and the corresponding
2375 address records were *not* found in the additional section, the port
2376 values from the SRV records were lost.
2378 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2379 using the correct key (the original address) when searching the retry
2380 rules in order to find which one to use for generating the retry hint.
2382 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2383 adding the default one. Similarly, if it contains a Reply-To: header, the
2384 errors_reply_to option, if set, is not used.
2386 PH/19 When calculating a retry time, Exim used to measure the "time since
2387 failure" by looking at the "first failed" field in the retry record. Now
2388 it does not use this if it is later than than the arrival time of the
2389 message. Instead it uses the arrival time. This makes for better
2390 behaviour in cases where some deliveries succeed, thus re-setting the
2391 "first failed" field. An example is a quota failure for a huge message
2392 when small messages continue to be delivered. Without this change, the
2393 "time since failure" will always be short, possible causing more frequent
2394 delivery attempts for the huge message than are intended.
2395 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2397 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2398 $1, $2, $3) because the numerical variables can be reset during some
2399 expansion items (e.g. "match"), thereby losing the authentication data.
2401 PH/21 Make -bV show the size of off_t variables so that the test suite can
2402 decide whether to run tests for quotas > 2G.
2404 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2405 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2406 filecount value is greater than 2G or if a quota value is greater than 2G
2407 on a system where the size of off_t is not greater than 4, a panic error
2410 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2411 never match. The debug and -bh output now contains an explicit error
2412 message indicating a malformed IPv4 address or mask.
2414 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2415 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2416 PH/23 above applies.
2418 PH/25 Do not write to syslog when running in the test harness. The only
2419 occasion when this arises is a failure to open the main or panic logs
2420 (for which there is an explicit test).
2422 PH/26 Added the /no_tell option to "control=freeze".
2424 PH/27 If a host name lookup failed very early in a connection, for example, if
2425 the IP address matched host_lookup and the reverse lookup yielded a name
2426 that did not have a forward lookup, an error message of the form "no IP
2427 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2428 could be logged. Now it outputs the IP address instead of "NULL".
2430 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2431 allows the sender and the authenticated sender to be set when
2432 submitting a message from within Exim. Since child_open_exim() is
2433 documented for local_scan(), the new function should be too.
2435 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2436 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2437 results in an empty string is now treated as unset.
2439 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2441 PH/31 Added sender_verify_fail logging option.
2443 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2444 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2445 tidied the source and removed it altogether.
2447 PH/33 When a queue run was abandoned because the load average was too high, a
2448 log line was always written; now it is written only if the queue_run log
2449 selector is set. In addition, the log line for abandonment now contains
2450 information about the queue run such as the pid. This is always present
2451 in "start" and "stop" lines but was omitted from the "abandon" line.
2453 PH/34 Omit spaces between a header name and the colon in the error message that
2454 is given when verify = headers_syntax fails (if there are lots of them,
2455 the message gets confusing).
2457 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2458 names, as there are now some PTR records that contain slashes. This check
2459 is only to protect against broken name servers that fall over on strange
2460 characters, so the fact that it applies to all lookups doesn't matter.
2462 PH/36 Now that the new test suite is complete, we can remove some of the
2463 special code in Exim that was needed for the old test suite. For example,
2464 sorting DNS records because real resolvers return them in an arbitrary
2465 order. The new test suite's fake resolver always returns records in the
2468 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2469 bounces) except when queue_only is set, to avoid logging races between
2470 the different processes.
2472 PH/38 Panic-die if .include specifies a non-absolute path.
2474 PH/39 A tweak to the "H" retry rule from its user.
2476 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2477 a label. They prevented compilation on older perls.
2479 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2480 a warning to be raised on newish perls.
2482 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2483 on queue. Changes to match documented behaviour of showing count of
2484 messages matching specified criteria.
2486 PH/40 Changed the default ident timeout from 30s to 5s.
2488 PH/41 Added support for the use of login_cap features, on those BSD systems
2489 that have them, for controlling the resources used by pipe deliveries.
2491 PH/42 The content-scanning code uses fopen() to create files in which to put
2492 message data. Previously it was not paying any attention to the mode of
2493 the files. Exim runs with umask(0) because the rest of the code creates
2494 files with open(), and sets the required mode explicitly. Thus, these
2495 files were ending up world-writeable. This was not a big issue, because,
2496 being within the spool directory, they were not world-accessible. I have
2497 created a function called modefopen, which takes an additional mode
2498 argument. It sets umask(777), creates the file, chmods it to the required
2499 mode, then resets the umask. All the relevant calls to fopen() in the
2500 content scanning code have been changed to use this function.
2502 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2503 to 24 hours. This avoids potential overflow problems when processing G
2504 and H retry rules. I suspect nobody ever tinkers with this value.
2506 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2508 PH/45 When the plaintext authenticator is running as a client, the server's
2509 challenges are checked to ensure they are valid base64 strings. By
2510 default, the authentication attempt is cancelled if an invalid string is
2511 received. Setting client_ignore_invalid_base64 true ignores these errors.
2512 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2513 they are received. Thus, the responses can be made to depend on the
2514 challenges. If an invalid string is ignored, an empty string is placed in
2517 PH/46 Messages that are created by the autoreply transport now contains a
2518 References: header, in accordance with RFCs 2822 and 3834.
2520 PH/47 Added authenticated_sender_force to the smtp transport.
2522 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2524 PH/49 Installed latest patch from the Sieve maintainer.
2526 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2527 was also set, the appendfile transport was unnecessarily scanning a
2528 directory of message files (e.g. for maildir delivery) to find the count
2529 of files (along with the size), even though it did not need this
2530 information. It now does the scan only if it needs to find either the
2531 size of the count of files.
2533 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2535 PH/52 Two bugs concerned with error handling when the smtp transport is
2538 (i) Exim was not creating retry information for temporary errors given
2539 for individual recipients after the DATA command when the smtp transport
2540 was used in LMTP mode. This meant that they could be retried too
2541 frequently, and not timed out correctly.
2543 (ii) Exim was setting the flag that allows error details to be returned
2544 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2545 recipients that were returned after the DATA command.
2547 PH/53 This is related to PH/52, but is more general: for any failing address,
2548 when detailed error information was permitted to be returned to the
2549 sender, but the error was temporary, then after the final timeout, only
2550 "retry timeout exceeded" was returned. Now it returns the full error as
2551 well as "retry timeout exceeded".
2553 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2554 do this, and (what is worse) MTAs that accept it.
2556 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2557 will now be deprecated.
2559 PH/56 New os.c-cygwin from the Cygwin maintainer.
2561 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2562 formats (previously only available in exim formats via -bpr, -bpru,
2563 and -bpra. Now also available in native and exiqgrep formats)
2565 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2566 with very large, slow to parse queues
2568 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2570 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2572 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2573 responses to authentication challenges, though it was showing the
2574 challenges; (ii) I've removed the CR characters from the debug output for
2577 PH/58 Allow for the insertion of a newline as well as a space when a string
2578 is turned into more than one encoded-word during RFC 2047 encoding. The
2579 Sieve code now uses this.
2581 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2582 data_4xx, lost_connection, tls_required.
2584 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2585 message was being sent as an SMTP response.
2587 PH/61 Add -l and -k options to exicyclog.
2589 PH/62 When verifying, if an address was redirected to one new address, so that
2590 verification continued, and the new address failed or deferred after
2591 having set something in $address_data, the value of $address_data was not
2592 passed back to the ACL. This was different to the case when no
2593 redirection occurred. The value is now passed back in both cases.
2595 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2596 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2597 use login_cap.h, so on its own it isn't the distinguishing feature. The
2598 new name refers directly to the setclassresources() function.
2600 PH/65 Added configuration files for NetBSD3.
2602 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2604 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2605 is preferred over IPv4.
2607 PH/68 The bounce_return_message and bounce_return_body options were not being
2608 honoured for bounces generated during the reception of non-SMTP messages.
2609 In particular, this applied to messages rejected by the ACL. This bug has
2610 been fixed. However, if bounce_return_message is true and bounce_return_
2611 body is false, the headers that are returned for a non-SMTP message
2612 include only those that have been read before the error was detected.
2613 (In the case of an ACL rejection, they have all been read.)
2615 PH/69 The HTML version of the specification is now built in a directory called
2616 spec_html instead of spec.html, because the latter looks like a path with
2617 a MIME-type, and this confuses some software.
2619 PH/70 Catch two compiler warnings in sieve.c.
2621 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2622 function verify_get_ident() calls ip_connect() to connect a socket, but
2623 if the "connect()" function timed out, ip_connect() used to close the
2624 socket. However, verify_get_ident() also closes the socket later, and in
2625 between Exim writes to the log, which may get opened at this point. When
2626 the socket was closed in ip_connect(), the log could get the same file
2627 descriptor number as the socket. This naturally causes chaos. The fix is
2628 not to close the socket in ip_connect(); the socket should be closed by
2629 the function that creates it. There was only one place in the code where
2630 this was missing, in the iplookup router, which I don't think anybody now
2631 uses, but I've fixed it anyway.
2633 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2634 well as to direct DNS lookups. Otherwise the handling of names in host
2635 lists is inconsistent and therefore confusing.
2641 PH/01 Two changes to the default runtime configuration:
2643 (1) Move the checks for relay_from_hosts and authenticated clients from
2644 after to before the (commented out) DNS black list checks.
2646 (2) Add control=submission to the relay_from_hosts and authenticated
2647 clients checks, on the grounds that messages accepted by these
2648 statements are most likely to be submissions.
2650 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2652 (1) Generate an error if the third argument for the ${prvs expansion is
2655 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2658 (3) Reset the variables that are obtained from the first argument of
2659 ${prvscheck and used in the second argument before leaving the code,
2660 because their memory is reclaimed, so using them afterwards may do
2663 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2664 one (it's much easier than Tom thought :-).
2666 (5) Because of (4), we can now allow for the use of $prvscheck_result
2667 inside the third argument.
2669 PH/03 For some reason, the default setting of PATH when running a command from
2670 a pipe transport was just "/usr/bin". I have changed it to
2673 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2674 anything to be listed in the output from -bV.
2676 PH/05 When a filter generated an autoreply, the entire To: header line was
2677 quoted in the delivery log line, like this:
2679 => >A.N.Other <ano@some.domain> <original@ddress> ...
2681 This has been changed so that it extracts the operative address. There
2682 may be more than one such address. If so, they are comma-separated, like
2685 => >ano@some.domain,ona@other.domain <original@ddress> ...
2687 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2688 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2689 not being looked up in the rDNS to get a host name, Exim was showing the
2690 IP address twice in Received: lines, even though the IP addresses were
2691 identical. For example:
2693 Received: from [1.2.3.4] (helo=[1.2.3.4])
2695 However, if the real host name was known, it was omitting the HELO data
2696 if it matched the actual IP address. This has been tidied up so that it
2697 doesn't show the same IP address twice.
2699 PH/07 When both +timestamp and +memory debugging was on, the value given by
2700 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2701 called by the debug printing, thereby overwriting the timestamp buffer.
2702 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2704 PH/08 When the original message was included in an autoreply transport, it
2705 always said "this is a copy of the message, including all the headers",
2706 even if body_only or headers_only was set. It now gives an appropriate
2709 PH/09 Applied a patch from the Sieve maintainer which:
2711 o fixes some comments
2712 o adds the (disabled) notify extension core
2713 o adds some debug output for the result of if/elsif tests
2714 o points to the current vacation draft in the documentation
2715 and documents the missing references header update
2719 o fixes a bug in processing the envelope test (when testing
2720 multiple envelope elements, the last element determinted the
2723 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2724 Electronic Mail") by including:
2726 Auto-submitted: auto-generated
2728 in the messages that it generates (bounce messages and others, such as
2729 warnings). In the case of bounce messages for non-SMTP mesages, there was
2730 also a typo: it was using "Auto_submitted" (underscore instead of
2731 hyphen). Since every message generated by Exim is necessarily in response
2732 to another message, thes have all been changed to:
2734 Auto-Submitted: auto-replied
2736 in accordance with these statements in the RFC:
2738 The auto-replied keyword:
2740 - SHOULD be used on messages sent in direct response to another
2741 message by an automatic process,
2743 - MUST NOT be used on manually-generated messages,
2745 - MAY be used on Delivery Status Notifications (DSNs) and Message
2746 Disposition Notifications (MDNs),
2748 - MUST NOT be used on messages generated by automatic or periodic
2749 processes, except for messages which are automatic responses to
2752 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2753 to the default Received: header definition.
2755 PH/12 Added log selector acl_warn_skipped (default on).
2757 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2758 variables because (a) they are in the wrong storage pool and (b) even if
2759 they were copied, it wouldn't work properly because of the caching.
2761 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2762 checking when decoding. Apparently there are clients that generate
2763 overlong encoded strings. Why am I not surprised?
2765 PH/15 If the first argument of "${if match_address" was not empty, but did not
2766 contain an "@" character, Exim crashed. Now it writes a panic log message
2767 and treats the condition as false.
2769 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2771 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2772 extension "envelope-auth". The code is finished and in agreement with
2773 other implementations, but there is no documentation so far and in fact,
2774 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2775 not changing the active code.
2777 Print executed "if" and "elsif" statements when debugging is used. This
2778 helps a great deal to understand what a filter does.
2780 Document more things not specified clearly in RFC3028. I had all this
2781 sorted out, when out of a sudden new issues came to my mind. Oops."
2783 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2786 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2787 canonical form (as documented). However, after a host name lookup from
2788 the IP address, check_host() was doing a simple string comparison with
2789 addresses acquired from the DNS when checking that the found name did
2790 have the original IP as one of its addresses. Since any found IPv6
2791 addresses are likely to be in abbreviated form, the comparison could
2792 fail. Luckily, there already exists a function for doing the comparison
2793 by converting both addresses to binary, so now that is used instead of
2794 the text comparison.
2796 PH/20 There was another similar case to PH/19, when a complete host name was
2797 given in a host list; looking up its IP address could give an abbreviated
2798 form, whereas the current host's name might or might not be abbreviated.
2799 The same fix has been applied.
2805 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2806 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2809 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2810 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2812 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2814 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2815 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2816 Also, for "Auto-Submitted", treat anything other than "no" as
2817 non-personal, in accordance with RFC 3834. (Previously it treated
2818 anything starting "auto-" as non-personal.)
2820 TF/01 The control=submission/name=... option had a problem with syntax
2821 errors if the name included a slash character. The /name= option
2822 now slurps the rest of the string, so it can include any characters
2823 but it must come last in the list of options (after /sender_retain
2826 PH/05 Some modifications to the interface to the fake nameserver for the new
2834 TK/01 Added the "success_on_redirect" address verification option. See
2835 NewStuff for rationale and an example.
2837 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2839 PH/02 Patch to exigrep to allow it to work on syslog lines.
2841 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2842 fread() to skip over the body file's header line, because in Cygwin the
2843 header line is locked and is inaccessible.
2845 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2846 co-exist for some time) to make it clear that it is the Exim ID that is
2847 referenced, not the Message-ID: header line.
2849 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2850 string_format() function, because snprintf() does not exist on all
2853 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2854 ${stat: expansion item.
2856 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2857 protocol synchronization error", to keep the pedants happy.
2859 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2860 well as for IRIX systems, when gcc is being used. See the host.c source
2863 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2865 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2868 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2869 transport and to the smtp transport in LMTP mode.
2871 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2873 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2874 run a filter in a subprocess. This could lead to confusion in subsequent
2875 lookups in the parent process. There should also be a search_tidyup() at
2876 the end of the subprocess.
2878 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2879 only if the host matched helo_try_verify_hosts, which caused the
2880 verification to occur when the EHLO/HELO command was issued. The ACL just
2881 tested the remembered result. Now, if a previous verification attempt has
2882 not happened, "verify = helo" does it there and then.
2884 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2886 TK/03 Fix log output including CR from clamd.
2888 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2889 exist provoked a memory error which could cause a segfault.
2891 PH/15 Installed PCRE 6.2
2893 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2895 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2896 of the problem. Specifically, suggested +O2 rather than +O1 for the
2899 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2901 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2902 record, the port was not correctly logged when the outgoing_port log
2903 selector was set (it logged the transort's default port).
2905 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2906 fallback_hosts, and "hosts" in the smtp transport.
2908 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2909 host errors such as "Connection refused".
2911 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2912 authentication with radiusclient 0.4.9:
2914 - Error returned from rc_read_config was caught wrongly
2915 - Username/password not passed on to radius server due to wrong length.
2917 The presumption is that some radiusclient API changes for 4.51/PH/17
2918 were not taken care of correctly. The code is still untested by me (my
2919 Linux distribution still has 0.3.2 of radiusclient), but it was
2920 contributed by a Radius user.
2922 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2923 expanding the "port" option of the smtp transport.
2925 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2926 while reading a MIME header. Thanks to Tom Hughes for a patch.
2928 PH/24 Include config.h inside local_scan.h so that configuration settings are
2931 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2932 that in an ACL for RCPT (for example), you can examine exactly what was
2935 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2936 commands, but it was not correctly comparing the address with the actual
2937 client host address. Thus, it would show the EHLO address in Received:
2938 header lines when this was not necessary.
2940 PH/27 Added the % operator to ${eval:}.
2942 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2943 it should be ignoring failures (because with -C, for example, it has lost
2944 privilege). It wasn't ignoring creation failures other than "already
2947 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2950 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2951 because an input line was too long, either on its own, or by virtue of
2952 too many continuations, the temporary file was not being removed, and the
2953 return code was incorrect.
2955 PH/31 Missing "BOOL" in function definition in filtertest.c.
2957 PH/32 Applied Sieve patches from the maintainer.
2959 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2961 PH/33 Added "verify = not_blind".
2963 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2964 Local/Makefile (with some defaults set). These are used in built scripts
2965 such as exicyclog, but they have never been used in the exim_install
2966 script (though there are many overriding facilities there). I have
2967 arranged that the exim_install script now takes note of these two
2970 PH/35 Installed configuration files for Dragonfly.
2972 PH/36 When a locally submitted message by a trusted user did not contain a
2973 From: header, and the sender address was obtained from -f or from an SMTP
2974 MAIL command, and the trusted user did not use -F to supply a sender
2975 name, $originator_name was incorrectly used when constructing a From:
2976 header. Furthermore, $originator_name was used for submission mode
2977 messages from external hosts without From: headers in a similar way,
2978 which is clearly wrong.
2980 PH/37 Added control=suppress_local_fixups.
2982 PH/38 When log_selector = +received_sender was set, and the addition of the
2983 sender made the log line's construction buffer exactly full, or one byte
2984 less than full, an overflow happened when the terminating "\n" was
2987 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2988 when the result of a list match is failure because a DNS lookup failed.
2990 PH/40 RM_COMMAND is now used in the building process.
2992 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2993 the "build-* directories that it finds.
2995 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2996 address in a domain literal was a prefix of an interface address.
2998 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2999 when verifying a sender address, unless rewrite_headers is false.
3001 PH/44 Wrote a long comment about why errors_to addresses are verified as
3002 recipients, not senders.
3004 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3005 the ratelimit ACL was added.
3007 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3009 PH/46 Added extra information about PostgreSQL errors to the error string.
3011 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3012 avoiding the need to install special zones in a real server. This is
3013 backwards compatible; if it can't find the fake resolver, it drops back.
3014 Thus, both old and new test suites can be run.
3016 TF/02 Added util/ratelimit.pl
3018 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3019 clock is set back in time.
3021 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3022 Candler <B.Candler@pobox.com>.
3024 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3025 OK for addresses that are the result of redirections.
3027 PH/48 A number of further additions for the benefit of the new test suite,
3028 including a fake gethostbyname() that interfaces to the fake DNS resolver
3031 TF/06 The fix for widen_domains has also been applied to qualify_single and
3032 search_parents which are the other dnslookup options that can cause
3035 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3038 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3040 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3041 service" if it encountered an MX record with an empty target hostname.
3042 The message is now "an MX or SRV record indicated no SMTP service".
3044 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3045 if the DNS of the sending site is misconfigured. This is quite a
3046 common situation. This change restores the behaviour of treating a
3047 helo verification defer as a failure.
3049 PH/51 If self=fail was set on a router, the bounce message did not include the
3050 actual error message.
3056 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3058 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3059 command itself ended in error, the underlying message about the transport
3060 filter timeout was being overwritten with the pipe command error. Now the
3061 underlying error message should be appended to the second error message.
3063 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3065 PH/02 Reduce the amount of output that "make" produces by default. Full output
3066 can still be requested.
3068 PH/03 The warning log line about a condition test deferring for a "warn" verb
3069 was being output only once per connection, rather than after each
3070 occurrence (because it was using the same function as for successful
3071 "warn" verbs). This seems wrong, so I have changed it.
3073 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3074 it should not have, which might have caused a crash in the right
3075 circumstances, but probably never did.
3077 PH/04 Installed a modified version of Tony Finch's patch to make submission
3078 mode fix the return path as well as the Sender: header line, and to
3079 add a /name= option so that you can make the user's friendly name appear
3082 TF/03 Added the control = fakedefer ACL modifier.
3084 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3085 Mark Lowes for thorough testing.
3087 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3089 TK/03 Merged latest SRS patch from Miles Wilton.
3091 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3092 with the definition in sysexits.h (which is #included earlier).
3093 Fortunately, Exim does not actually use EX_OK. The code used to try to
3094 preserve the sysexits.h value, by assumimg that macro definitions were
3095 scanned for macro replacements. I have been disabused of this notion,
3096 so now the code just undefines EX_OK before #including unistd.h.
3098 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3099 in the smtp transport. When a block could not be written in a single
3100 write() function, the timeout was being re-applied to each part-write.
3101 This seems wrong - if the receiver was accepting one byte at a time it
3102 would take for ever. The timeout is now adjusted when this happens. It
3103 doesn't have to be particularly precise.
3105 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3106 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3108 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3109 without a domain if the check to <postmaster@domain> fails.
3111 SC/01 Eximstats: added -xls and the ability to specify output files
3112 (patch written by Frank Heydlauf).
3114 SC/02 Eximstats: use FileHandles for outputing results.
3116 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3118 SC/04 Eximstats: fixed display of large numbers with -nvr option
3120 SC/05 Eximstats: fixed merging of reports with empty tables.
3122 SC/06 Eximstats: added the -include_original_destination flag
3124 SC/07 Eximstats: removed tabs and trailing whitespace.
3126 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3128 TK/06 MBOX spool code: Add real "From " MBOX separator line
3129 so the .eml file is really in mbox format (even though
3130 most programs do not really care). Patch from Alex Miller.
3132 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3133 The latter is generated from $received_to and is only set if the
3134 message has one envelope recipient. SA can use these headers,
3135 obviously out-of-the-box. Patch from Alex Miller.
3137 PH/08 The ${def test on a variable was returning false if the variable's
3138 value was "0", contrary to what the specification has always said!
3139 The result should be true unless the variable is empty.
3141 PH/09 The syntax error of a character other than { following "${if
3142 def:variable_name" (after optional whitespace) was not being diagnosed.
3143 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3144 accidental colon was present, for example, could give incorrect results.
3146 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3147 result is used (not including appendfile, where other changes are about
3150 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3151 This involved changing a lot of size variables from int to off_t. It
3152 should work with maildirs and everything.
3154 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3155 spamd dying while we are connected to it.
3157 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3160 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3161 function for BDB 4.3.
3163 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3165 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3166 the sources for PCRE have been re-arranged and more files are now
3169 PH/15 The code I had for printing potentially long long variables in PH/11
3170 above was not the best (it lost precision). The length of off_t variables
3171 is now inspected at build time, and an appropriate printing format (%ld
3172 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3173 to be "long long int" or "long int". This is needed for the internal
3174 formatting function string_vformat().
3176 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3177 the configuration file to be ":syslog", then the script "guesses" where
3178 the logs files are, rather than using the compiled in default. In our
3179 case the guess is not the same as the compiled default, so the script
3180 suddenly stopped working when I started to use syslog. The patch checks
3181 to see if log_file_path is "". If so, it attempts to read it from exim
3182 with no configuration file to get the compiled in version, before it
3183 falls back to the previous guessing code."
3185 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3186 implementing BATV in an Exim configuration. See NewStuff for the gory
3189 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3190 Makefile that are specific to HP-UX.
3192 PH/18 If the "use_postmaster" option was set for a recipient callout together
3193 with the "random" option, the postmaster address was used as the MAIL
3194 FROM address for the random test, but not for the subsequent recipient
3195 test. It is now used for both.
3197 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3198 patch removes a few documentation additions to RFC 3028, because the
3199 latest draft now contains them. It adds the new en;ascii-case comparator
3200 and a new error check for 8bit text in MIME parts. Comparator and
3201 require names are now matched exactly. I enabled the subaddress
3202 extension, but it is not well tested yet (read: it works for me)."
3204 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3205 rework some of the code of TK/09 above to avoid the hardwired use of
3206 "%lld" and "long long". Replaced the call to snprintf() with a call to
3209 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3210 records point to non-existent hosts", "retry timeout exceeded", and
3211 "retry time not reached for any host after a long failure period".
3213 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3214 experimental DomainKeys support:
3216 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3217 (2) On an error such as an illegally used "control", the wrong name for
3218 the control was given.
3220 These problems did NOT occur unless DomainKeys support was compiled.
3222 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3224 PH/24 Added ${if match_ip condition.
3226 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3227 databases so that it will be absolutely obvious if a crash occurs in the
3228 DB library. This is a regular occurrence (often caused by mis-matched
3231 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3232 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3233 picked up on a user's system that detects such things. There doesn't seem
3234 to be a gcc warning option for this - only an attribute that has to be
3235 put on the function's prototype. It seems that in Fedora Core 4 they have
3236 set this on a number of new functions. No doubt there will be more in due
3239 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3240 specify a transport. However, if an address that was verified by such a
3241 router was the subject of a callout, Exim crashed because it tried to
3242 read the rcpt_include_affixes from the non-existent transport. Now it
3243 just assumes that the setting of that option is false. This bug was
3244 introduced by 4.51/PH/31.
3246 PH/28 Changed -d+all to exclude +memory, because that information is very
3247 rarely of interest, but it makes the output a lot bigger. People tend to
3248 do -d+all out of habit.
3250 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3251 code in os-type was giving problems when libc.so lives in lib64, like on
3254 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3255 aren't the modern standard, and it seems that some systems' include files
3256 don't always have them. Exim was already checking for some of the newer
3257 ones like T_AAAA, and defining it itself. I've added checks for all the
3258 record types that Exim uses.
3260 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3261 not automatically generating a new one, as it is supposed to. This
3262 prevented TLS from working. If the file did exist, but contained invalid
3263 data, a new version was generated, as expected. It was only the case of a
3264 non-existent file that was broken.
3266 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3267 with a change in libdomainkeys > 0.64.
3269 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3270 from DNS. If the selector record carries the flag, it now has
3271 precedence over the domain-wide flag.
3273 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3275 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3276 the use of a port name that isn't defined in /etc/services) occurred, the
3277 message was deferred as in a normal delivery, and thus remained on the
3278 spool, instead of being failed because of the mua_wrapper setting. This
3279 is now fixed, and I tidied up some of the mua_wrapper messages at the
3282 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3283 the messages in a hash of arrays rather than using individual hashes.
3284 This is a bit cleaner and results in dramatic memory savings, albeit
3285 at a slight CPU cost.
3287 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3288 as requested by Marc Sherman.
3290 SC/10 Eximstats: added histograms for user specified patterns as requested
3293 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3295 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3296 fopen() in the content-scanning modules that did not already have it.
3302 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3303 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3305 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3307 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3309 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3310 to test Sieve filters that use "vacation".
3312 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3313 that changes the way the GnuTLS parameters are stored in the cache file.
3314 The new format can be generated externally. For backward compatibility,
3315 if the data in the cache doesn't make sense, Exim assumes it has read an
3316 old-format file, and it generates new data and writes a new file. This
3317 means that you can't go back to an older release without removing the
3320 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3321 work if there are any delivery delays because "one_time" forces the
3322 parent to be marked "delivered", so its unseen clone is never tried
3323 again. For this reason, Exim now forbids the simultaneous setting of
3326 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3327 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3328 entry if you want to know the details. The fix, however, neglected to
3329 consider the case when local delivery batching is involved. The test for
3330 "previously delivered" was not happening when checking to see if an
3331 address could be batched with a previous (undelivered) one; under
3332 certain circumstances this could lead to multiple deliveries to the same
3335 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3336 in its include files, and this causes problems building Exim.
3338 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3339 header_syntax) but Exim was just ignoring anything given after a slash.
3340 In particular, this caused confusion with an attempt to use "verify =
3341 reverse_host_lookup/defer_ok". An error is now given when options are
3342 supplied for verify items that do not have them. (Maybe reverse_host_
3343 lookup should have a defer_ok option, but that's a different point.)
3345 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3346 defined by RFC 821) to 2048, because there were problems with some AUTH
3347 commands, and RFC 1869 says the size should be increased for extended
3348 SMTP commands that take arguments.
3350 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3353 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3354 "unknown" error; now it says that the functionality isn't in the binary.
3356 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3357 an address' error message when a string expansion fails (syntax or
3358 whatever). Otherwise the password may appear in the log. Following change
3359 PH/42 below, there is no longer a chance of it appearing in a bounce
3362 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3364 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3365 of its addresses was ever tried. (Bugzilla bug #2.)
3367 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3368 the result incorrectly in the debug output. (It correctly added a newline
3369 to what was transported.)
3371 TF/01 Added $received_time.
3373 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3374 commented out examples of how to interface to a virus scanner and to
3375 SpamAssassin. Also added commented examples of av_scanner and
3376 spamd_address settings.
3378 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3379 and controls are allowed in which ACLs. There were a couple of minor
3380 errors. Some of the entries in the conditions table (which is a table of
3381 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3382 negation of where the condition IS allowed.
3384 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3386 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3387 header file does not have a version number, so I've had to invent a new
3388 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3389 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3390 radiusclient), but it was contributed by a Radius user.
3392 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3393 files or directories, for OpenSSL.
3395 PH/19 When an Exim process that is running as root has to create an Exim log
3396 file, it does so in a subprocess that runs as exim:exim so as to get the
3397 ownership right at creation (otherwise, other Exim processes might see
3398 the file with the wrong ownership). There was no test for failure of this
3399 fork() call, which would lead to the process getting stuck as it waited
3400 for a non-existent subprocess. Forks do occasionally fail when resources
3401 run out. I reviewed all the other calls to fork(); they all seem to check
3404 PH/20 When checking for unexpected SMTP input at connect time (before writing
3405 the banner), Exim was not dealing correctly with a non-positive return
3406 from the read() function. If the client had disconnected by this time,
3407 the result was a log entry for a synchronization error with an empty
3408 string after "input=" when read() returned zero. If read() returned -1
3409 (an event I could not check), uninitialized data bytes were printed.
3410 There were reports of junk text (parts of files, etc) appearing after
3413 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3415 PH/22 Added support for macro redefinition, and (re)definition in between
3416 driver and ACL definitions.
3418 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3419 forgetting to use the resulting value; it was using the unexpanded value.
3421 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3422 hadn't been configured. The fix is from Juergen Kreileder, who
3423 understands it better than I do:
3425 "Here's what I see happening with three configured cyrus_sasl
3426 authenticators configured (plain, login, cram-md5):
3428 On startup auth_cyrus_sasl_init() gets called for each of these.
3429 This means three calls to sasl_listmech() without a specified mech_list.
3430 => SASL tests which mechs of all available mechs actually work
3431 => three warnings about OTP not working
3432 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3434 With the patch, sasl_listmech() also gets called three times. But now
3435 SASL's mech_list option is set to the server_mech specified in the the
3436 authenticator. Or in other words, the answer from sasl_listmech()
3437 gets limited to just the mech you're testing for (which is different
3439 => the return list contains just 'plain' or 'login', 'cram-md5' or
3440 nothing depending on the value of ob->server_mech.
3442 I've just tested the patch: Authentication still works fine,
3443 unavailable mechs specified in the exim configuration are still
3444 caught, and the auth.log warnings about OTP are gone."
3446 PH/25 When debugging is enabled, the contents of the command line are added
3447 to the debugging output, even when log_selector=+arguments is not
3450 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3451 answer is "GNU", and only if the return is "GNU/something" is the answer
3454 PH/27 $acl_verify_message is now set immediately after the failure of a
3455 verification in an ACL, and so is available in subsequent modifiers. In
3456 particular, the message can be preserved by coding like this:
3458 warn !verify = sender
3459 set acl_m0 = $acl_verify_message
3461 Previously, $acl_verify_message was set only while expanding "message"
3462 and "log_message" when a very denied access.
3464 PH/28 Modified OS/os.c-Linux with
3466 -#ifndef OS_LOAD_AVERAGE
3467 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3469 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3470 nomenclature these days.)
3472 PH/29 Installed patch from the Sieve maintainer that adds the options
3473 sieve_useraddress and sieve_subaddress to the redirect router.
3475 PH/30 In these circumstances:
3476 . Two addresses routed to the same list of hosts;
3477 . First host does not offer TLS;
3478 . First host accepts first address;
3479 . First host gives temporary error to second address;
3480 . Second host offers TLS and a TLS session is established;
3481 . Second host accepts second address.
3482 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3483 and peerdn, if requested) that were in fact used only for the second
3486 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3487 attention to any local part prefix or suffix that was matched by the
3488 router that accepted the address. It now behaves in the same way as it
3489 does for delivery: the affixes are removed from the local part unless
3490 rcpt_include_affixes is set on the transport.
3492 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3493 timeout during the DATA phase of an incoming message.
3495 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3496 applied a patch sanctioned by the Sieve maintainer.
3498 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3499 the uid or gid is negative. A case of a negative gid caused this to be
3500 noticed. The fix allows for either to be negative.
3502 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3503 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3506 PH/36 The change PH/12 above was broken. Fixed it.
3508 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3509 the grounds that routing the same address twice would always produce the
3510 same answer. This might have been true once, but it is certainly no
3511 longer true now. Routing a child address may depend on the previous
3512 routing that produced that child. Some complicated redirection strategies
3513 went wrong when messages had multiple recipients, and made Exim's
3514 behaviour dependent on the order in which the addresses were given.
3516 I have moved the duplicate checking until after the routing is complete.
3517 Exim scans the addresses that are assigned to local and remote
3518 transports, and removes any duplicates. This means that more work will be
3519 done, as duplicates will always all be routed, but duplicates are
3520 presumably rare, so I don't expect this is of any significance.
3522 For deliveries to pipes, files, and autoreplies, the duplicate checking
3523 still happens during the routing process, since they are not going to be
3526 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3527 It corrects a timeout issue with spamd. This is Ian's comment: "The
3528 background is that sometimes spamd either never reads data from a
3529 connection it has accepted, or it never writes response data. The exiscan
3530 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3531 blindly assumes that writes won't block so it may never time out."
3533 PH/39 Allow G after quota size as well as K and M.
3535 PH/40 The value set for $authenticated_id in an authenticator may not contain
3536 binary zeroes or newlines because the value is written to log lines and
3537 to spool files. There was no check on this. Now the value is run through
3538 the string_printing() function so that such characters are converted to
3539 printable escape sequences.
3541 PH/41 $message_linecount is a new variable that contains the total number of
3542 lines in the message. Compare $body_linecount, which is the count for the
3545 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3546 bounce and delay warning messages, except in certain special cases, which
3549 (a) An SMTP error message from a remote host;
3550 (b) A message specified in a :fail: redirection;
3551 (c) A message specified in a "fail" command in a system filter;
3552 (d) A message specified in a FAIL return from the queryprogram router;
3553 (e) A message specified by the cannot_route_message router option.
3555 In these cases only, Exim does include the error details in bounce and
3556 warning messages. There are also a few cases where bland messages such
3557 as "unrouteable address" or "local delivery error" are given.
3559 PH/43 $value is now also set for the "else" part of a ${run expansion.
3561 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3562 being worked on, but at least Exim now implements the latest version to
3565 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3566 process to complete was treated as a delivery failure, a timeout while
3567 writing the message to the pipe was logged, but erroneously treated as a
3568 successful delivery. Such timeouts include transport filter timeouts. For
3569 consistency with the overall process timeout, these timeouts are now
3570 treated as errors, giving rise to delivery failures by default. However,
3571 there is now a new Boolean option for the pipe transport called
3572 timeout_defer, which, if set TRUE, converts the failures into defers for
3573 both kinds of timeout. A transport filter timeout is now identified in
3576 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3577 systems where "make" and "gmake" are different, calling "gmake" at top
3578 level broke things. I've arranged for the value of $(MAKE) to be passed
3579 from the Makefile to this script so that it can call the same version of
3583 A note about Exim versions 4.44 and 4.50
3584 ----------------------------------------
3586 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3587 changes of various kinds. As a consequence, a big documentation update was
3588 needed. This delayed the release for rather longer than seemed good, especially
3589 in the light of a couple of (minor) security issues. Therefore, the changes
3590 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3591 release. So 4.44 and 4.50 are in effect two different branches that both start
3594 I have left the 4.50 change log unchanged; it contains all the changes since
3595 4.43. The change log for 4.44 is below; many of its items are identical to
3596 those for 4.50. This seems to be the most sensible way to preserve the
3597 historical information.
3603 1. Minor wording change to the doc/README.SIEVE file.
3605 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3606 computation of the current number of files was incorrect.
3608 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3609 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3612 4. Give more explanation in the error message when the command for a transport
3613 filter fails to execute.
3615 5. There are several places where Exim runs a non-Exim command in a
3616 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3617 was being done only for the command run by the queryprogram router. It is
3618 now done for all such subprocesses. The other cases are: ${run, transport
3619 filters, and the commands run by the lmtp and pipe transports.
3621 6. Added CONFIGURE_GROUP build-time option.
3623 7. Some older OS have a limit of 256 on the maximum number of file
3624 descriptors. Exim was using setrlimit() to set 1000 as a large value
3625 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3626 systems. I've change it so that if it can't get 1000, it tries for 256.
3628 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3629 was an oversight, and furthermore, ever since the addition of extra
3630 controls (e.g. 4.43/32), the checks on when to allow different forms of
3631 "control" were broken. There should now be diagnostics for all cases when a
3632 control that does not make sense is encountered.
3634 9. Added the /retain_sender option to "control=submission".
3636 10. $recipients is now available in the predata ACL (oversight).
3638 11. Tidy the search cache before the fork to do a delivery from a message
3639 received from the command line. Otherwise the child will trigger a lookup
3640 failure and thereby defer the delivery if it tries to use (for example) a
3641 cached ldap connection that the parent has called unbind on.
3643 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3644 of $address_data from the recipient verification was clobbered by the
3645 sender verification.
3647 13. The value of address_data from a sender verification is now available in
3648 $sender_address_data in subsequent conditions in the ACL statement.
3650 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3652 15. Added a new option "connect=<time>" to callout options, to set a different
3655 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3656 was its contents. (It was OK if the option was not defined at all.)
3658 17. A "Completed" log line is now written for messages that are removed from
3659 the spool by the -Mrm option.
3661 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3662 information about exactly what failed.
3664 19. Added -dd to debug only the daemon process.
3666 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3667 handles timeouts, both on the server side and network timeouts. Renamed the
3668 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3670 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3671 It is now set to "smtps".
3673 22. $host_address is now set to the target address during the checking of
3674 ignore_target_hosts.
3676 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3677 being passed; this would have caused $sender_host_name to have been used if
3678 matching the list had actually called for a host name (not very likely,
3679 since this list is usually IP addresses). A host name is now passed as
3682 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3683 code that specifies a non-restarting handler (typically sigaction() in
3684 modern systems) in an attempt to fix a rare and obscure crash bug.
3686 25. Narrowed the window for a race in the daemon that could cause it to ignore
3687 SIGCHLD signals. This is not a major problem, because they are used only to
3688 wake it up if nothing else does.
3690 26. A malformed maildirsize file could cause Exim to calculate negative values
3691 for the mailbox size or file count. Odd effects could occur as a result.
3692 The maildirsize information is now recalculated if the size or filecount
3695 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3696 support for a long time. Removed HAVE_SYS_VFS_H.
3698 28. Installed the latest version of exipick from John Jetmore.
3700 29. In an address list, if the pattern was not a regular expression, an empty
3701 subject address (from a bounce message) matched only if the pattern was an
3702 empty string. Non-empty patterns were not even tested. This was the wrong
3703 because it is perfectly reasonable to use an empty address as part of a
3704 database query. An empty address is now tested by patterns that are
3705 lookups. However, all the other forms of pattern expect the subject to
3706 contain a local part and a domain, and therefore, for them, an empty
3707 address still always fails if the pattern is not itself empty.
3709 30. Exim went into a mad DNS loop when attempting to do a callout where the
3710 host was specified on an smtp transport, and looking it up yielded more
3711 than one IP address.
3713 31. Re-factored the code for checking spool and log partition space into a
3714 function that finds that data and another that does the check. The former
3715 is then used to implement four new variables: $spool_space, $log_space,
3716 $spool_inodes, and $log_inodes.
3718 32. The RFC2047 encoding function was originally intended for short strings
3719 such as real names; it was not keeping to the 75-character limit for
3720 encoded words that the RFC imposes. It now respects the limit, and
3721 generates multiple encoded words if necessary. To be on the safe side, I
3722 have increased the buffer size for the ${rfc2047: expansion operator from
3725 33. It is now permitted to omit both strings after an "if" condition; if the
3726 condition is true, the result is "true". As before, when the second string
3727 is omitted, a false condition yields an empty string. This makes it less
3728 cumbersome to write custom ACL and router conditions.
3730 34. Failure to deliver a bounce message always caused it to be frozen, even if
3731 there was an errors_to setting on the router. The errors_to setting is now
3734 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3735 canonical form (fully expanded) before being placed in
3736 $sender_host_address.
3738 36. The table in the code that translates DNS record types into text (T_A to
3739 "A" for instance) was missing entries for NS and CNAME. It is just possible
3740 that this could have caused confusion if both these types were looked up
3741 for the same domain, because the text type is used as part of Exim's
3742 per-process caching. But the chance of anyone hitting this buglet seems
3745 37. The dnsdb lookup has been extended in a number of ways.
3747 (1) There is a new type, "zns", which walks up the domain tree until it
3748 finds some nameserver records. It should be used with care.
3750 (2) There is a new type, "mxh", which is like "mx" except that it returns
3751 just the host names, not the priorities.
3753 (3) It is now possible to give a list of domains (or IP addresses) to be
3754 looked up. The behaviour when one of the lookups defers can be
3755 controlled by a keyword.
3757 (4) It is now possible to specify the separator character for use when
3758 multiple records are returned.
3760 38. The dnslists ACL condition has been extended: it is now possible to supply
3761 a list of IP addresses and/or domains to be looked up in a particular DNS
3764 39. Added log_selector=+queue_time_overall.
3766 40. When running the queue in the test harness, wait just a tad after forking a
3767 delivery process, to get repeatability of debugging output.
3769 41. Include certificate and key file names in error message when GnuTLS fails
3770 to set them up, because the GnuTLS error message doesn't include the name
3771 of the failing file when there is a problem reading it.
3773 42. Allow both -bf and -bF in the same test run.
3775 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3777 44. The "Exiscan patch" is now merged into the mainline Exim source.
3779 45. Sometimes the final signoff response after QUIT could fail to get
3780 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3781 < 0 before doing a fflush(). This bug looks as though it goes back to the
3782 introduction of TLS in release 3.20, but "sometimes" must have been rare
3783 because the tests only now provoked it.
3785 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3786 (this can affect the format of dates).
3788 47. exim_tidydb, when checking for the continued existence of a message for
3789 which it has found a message-specific retry record, was not finding
3790 messages that were in split spool directories. Consequently, it was
3791 deleting retry records that should have stayed in existence.
3793 48. Steve fixed some bugs in eximstats.
3795 49. The SPA authentication driver was not abandoning authentication and moving
3796 on to the next authenticator when an expansion was forced to fail,
3797 contradicting the general specification for all authenticators. Instead it
3798 was generating a temporary error. It now behaves as specified.
3800 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3801 (the order specifies the preference for clients). The order is now AES256,
3802 AES128, 3DES, ARCFOUR128.
3804 51. Small patch to Sieve code - explicitly set From: when generating an
3807 52. Exim crashed if a remote delivery caused a very long error message to be
3808 recorded - for instance if somebody sent an entire SpamAssassin report back
3809 as a large number of 550 error lines. This bug was coincidentally fixed by
3810 increasing the size of one of Exim's internal buffers (big_buffer) that
3811 happened as part of the Exiscan merge. However, to be on the safe side, I
3812 have made the code more robust (and fixed the comments that describe what
3815 53. Now that there can be additional text after "Completed" in log lines (if
3816 the queue_time_overall log selector is set), a one-byte patch to exigrep
3817 was needed to allow it to recognize "Completed" as not the last thing in
3820 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3821 patch that reportedly fixes this has been added. I am not expert enough to
3822 create a test for it. This is what the patch creator wrote:
3824 "I found a little strange behaviour of ldap code when working with
3825 Windows 2003 AD Domain, where users was placed in more than one
3826 Organization Units. When I tried to give exim partial DN, the exit code
3827 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3828 But simultaneously result of request was absolutely normal ldap result,
3829 so I produce this patch..."
3831 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3832 REFERENCE, so I have modified the code to exclude the patch when that macro
3835 55. Some experimental protocols are using DNS PTR records for new purposes. The
3836 keys for these records are domain names, not reversed IP addresses. The
3837 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3838 leaves it alone. Component reversal etc. now happens only for IP addresses.
3841 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3843 57. Double the size of the debug message buffer (to 2048) so that more of very
3844 long debug lines gets shown.
3846 58. The exicyclog utility now does better if the number of log files to keep
3847 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3849 59. Two changes related to the smtp_active_hostname option:
3851 (1) $smtp_active_hostname is now available as a variable.
3852 (2) The default for smtp_banner uses $smtp_active_hostname instead
3853 of $primary_hostname.
3855 60. The host_aton() function is supposed to be passed a string that is known
3856 to be a valid IP address. However, in the case of IPv6 addresses, it was
3857 not checking this. This is a hostage to fortune. Exim now panics and dies
3858 if the condition is not met. A case was found where this could be provoked
3859 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3860 components; fortuitously, this particular loophole had already been fixed
3861 by change 4.50/55 above.
3863 If there are any other similar loopholes, the new check in host_aton()
3864 itself should stop them being exploited. The report I received stated that
3865 data on the command line could provoke the exploit when Exim was running as
3866 exim, but did not say which command line option was involved. All I could
3867 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3868 running as the user.
3871 61. There was a buffer overflow vulnerability in the SPA authentication code
3872 (which came originally from the Samba project). I have added a test to the
3873 spa_base64_to_bits() function which I hope fixes it.
3876 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3877 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3879 63. The daemon start-up calls getloadavg() while still root for those OS that
3880 need the first call to be done as root, but it missed one case: when
3881 deliver_queue_load_max is set with deliver_drop_privilege. This is
3882 necessary for the benefit of the queue runner, because there is no re-exec
3883 when deliver_drop_privilege is set.
3885 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3886 This has been fixed.
3888 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3889 was in use, was not putting the data itself into the right store pool;
3890 consequently, it could be overwritten for a subsequent message in the same
3891 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3894 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3896 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3897 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3898 the function were treating the return as a boolean value, which happened to
3899 work because 0=false and not-0=true, but is not correct code.
3901 68. The host_aton() function was not handling scoped IPv6 addresses (those
3902 with, for example, "%eth0" on the end) correctly.
3904 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3905 negated items (that is, ~something) in unsigned ints. Some compilers
3906 apparently mutter when there is no cast.
3908 70. If an address verification called from an ACL failed, and did not produce a
3909 user-specific message (i.e. there was only a "system" message), nothing was
3910 put in $acl_verify_message. In this situation, it now puts the system
3913 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3914 session; change 4.31/43 added the unwanted input to the log line - except
3915 that it did not do this in the start of session case. It now does.
3917 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3918 This is wrong and can cause the other end to generate a synchronization
3919 error if it is another Exim or anything else that does the synchronization
3920 check. A QUIT command is no longer sent after a timeout.
3922 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3923 during host lookups.
3925 74. The defer_ok option of callout verification was not working if it was used
3926 when verifying addresses in header lines, that is, for this case:
3928 verify = header_sender/callout=defer_ok
3930 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3931 those file descriptors could be used for SMTP connections. If anything
3932 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3933 could be sent to the SMTP client, causing chaos. The daemon now opens
3934 stdin, stdout, and stderr to /dev/null when it puts itself into the
3937 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3938 log by default. The user can override this with suitable Perl magic.
3940 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3941 the log message when discard triggers, was not working for the DATA ACL or
3942 for the non-SMTP ACL.
3944 78. Error message wording change in sieve.c.
3946 79. If smtp_accept_max_per_host was set, the number of connections could be
3947 restricted to fewer than expected, because the daemon was trying to set up
3948 a new connection before checking whether the processes handling previous
3949 connections had finished. The check for completed processes is now done
3950 earlier. On busy systems, this bug wouldn't be noticed because something
3951 else would have woken the daemon, and it would have reaped the completed
3954 80. If a message was submitted locally by a user whose login name contained one
3955 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3956 It caused a spool format error. I have fixed the spool reading code. A
3957 related problem was that the "from" clause in the Received: line became
3958 illegal because of the space(s). It is now covered by ${quote_local_part.
3960 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3963 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3965 83. Patch from Sieve maintainer to fix unterminated string problem in
3966 "vacation" handling.
3968 84. Some minor changes to the Linux configuration files to help with other
3969 OS variants using glibc.
3971 85. One more patch for Sieve to update vacation handling to latest spec.
3974 ----------------------------------------------------
3975 See the note above about the 4.44 and 4.50 releases.
3976 ----------------------------------------------------
3982 1. Change 4.43/35 introduced a bug that caused file counts to be
3983 incorrectly computed when quota_filecount was set in an appendfile
3986 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3987 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3990 3. Give more explanation in the error message when the command for a transport
3991 filter fails to execute.
3993 4. There are several places where Exim runs a non-Exim command in a
3994 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3995 was being done only for the command run by the queryprogram router. It is
3996 now done for all such subprocesses. The other cases are: ${run, transport
3997 filters, and the commands run by the lmtp and pipe transports.
3999 5. Some older OS have a limit of 256 on the maximum number of file
4000 descriptors. Exim was using setrlimit() to set 1000 as a large value
4001 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4002 systems. I've change it so that if it can't get 1000, it tries for 256.
4004 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4005 was an oversight, and furthermore, ever since the addition of extra
4006 controls (e.g. 4.43/32), the checks on when to allow different forms of
4007 "control" were broken. There should now be diagnostics for all cases when a
4008 control that does not make sense is encountered.
4010 7. $recipients is now available in the predata ACL (oversight).
4012 8. Tidy the search cache before the fork to do a delivery from a message
4013 received from the command line. Otherwise the child will trigger a lookup
4014 failure and thereby defer the delivery if it tries to use (for example) a
4015 cached ldap connection that the parent has called unbind on.
4017 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4018 of $address_data from the recipient verification was clobbered by the
4019 sender verification.
4021 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4022 was its contents. (It was OK if the option was not defined at all.)
4024 11. A "Completed" log line is now written for messages that are removed from
4025 the spool by the -Mrm option.
4027 12. $host_address is now set to the target address during the checking of
4028 ignore_target_hosts.
4030 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4031 being passed; this would have caused $sender_host_name to have been used if
4032 matching the list had actually called for a host name (not very likely,
4033 since this list is usually IP addresses). A host name is now passed as
4036 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4037 code that specifies a non-restarting handler (typically sigaction() in
4038 modern systems) in an attempt to fix a rare and obscure crash bug.
4040 15. Narrowed the window for a race in the daemon that could cause it to ignore
4041 SIGCHLD signals. This is not a major problem, because they are used only to
4042 wake it up if nothing else does.
4044 16. A malformed maildirsize file could cause Exim to calculate negative values
4045 for the mailbox size or file count. Odd effects could occur as a result.
4046 The maildirsize information is now recalculated if the size or filecount
4049 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4050 support for a long time. Removed HAVE_SYS_VFS_H.
4052 18. Updated exipick to current release from John Jetmore.
4054 19. Allow an empty sender to be matched against a lookup in an address list.
4055 Previously the only cases considered were a regular expression, or an
4058 20. Exim went into a mad DNS lookup loop when doing a callout where the
4059 host was specified on the transport, if the DNS lookup yielded more than
4062 21. The RFC2047 encoding function was originally intended for short strings
4063 such as real names; it was not keeping to the 75-character limit for
4064 encoded words that the RFC imposes. It now respects the limit, and
4065 generates multiple encoded words if necessary. To be on the safe side, I
4066 have increased the buffer size for the ${rfc2047: expansion operator from
4069 22. Failure to deliver a bounce message always caused it to be frozen, even if
4070 there was an errors_to setting on the router. The errors_to setting is now
4073 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4074 canonical form (fully expanded) before being placed in
4075 $sender_host_address.
4077 24. Updated eximstats to version 1.33
4079 25. Include certificate and key file names in error message when GnuTLS fails
4080 to set them up, because the GnuTLS error message doesn't include the name
4081 of the failing file when there is a problem reading it.
4083 26. Expand error message when OpenSSL has problems setting up cert/key files.
4086 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4087 (this can affect the format of dates).
4089 28. exim_tidydb, when checking for the continued existence of a message for
4090 which it has found a message-specific retry record, was not finding
4091 messages that were in split spool directories. Consequently, it was
4092 deleting retry records that should have stayed in existence.
4094 29. eximstats updated to version 1.35
4095 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4096 1.35 - bugfix such that pie charts by volume are generated correctly
4098 30. The SPA authentication driver was not abandoning authentication and moving
4099 on to the next authenticator when an expansion was forced to fail,
4100 contradicting the general specification for all authenticators. Instead it
4101 was generating a temporary error. It now behaves as specified.
4103 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4104 (the order specifies the preference for clients). The order is now AES256,
4105 AES128, 3DES, ARCFOUR128.
4107 31. Small patch to Sieve code - explicitly set From: when generating an
4110 32. Exim crashed if a remote delivery caused a very long error message to be
4111 recorded - for instance if somebody sent an entire SpamAssassin report back
4112 as a large number of 550 error lines. This bug was coincidentally fixed by
4113 increasing the size of one of Exim's internal buffers (big_buffer) that
4114 happened as part of the Exiscan merge. However, to be on the safe side, I
4115 have made the code more robust (and fixed the comments that describe what
4118 33. Some experimental protocols are using DNS PTR records for new purposes. The
4119 keys for these records are domain names, not reversed IP addresses. The
4120 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4121 leaves it alone. Component reversal etc. now happens only for IP addresses.
4124 34. The host_aton() function is supposed to be passed a string that is known
4125 to be a valid IP address. However, in the case of IPv6 addresses, it was
4126 not checking this. This is a hostage to fortune. Exim now panics and dies
4127 if the condition is not met. A case was found where this could be provoked
4128 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4129 components; fortuitously, this particular loophole had already been fixed
4130 by change 4.50/55 or 4.44/33 above.
4132 If there are any other similar loopholes, the new check in host_aton()
4133 itself should stop them being exploited. The report I received stated that
4134 data on the command line could provoke the exploit when Exim was running as
4135 exim, but did not say which command line option was involved. All I could
4136 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4137 running as the user.
4140 35. There was a buffer overflow vulnerability in the SPA authentication code
4141 (which came originally from the Samba project). I have added a test to the
4142 spa_base64_to_bits() function which I hope fixes it.
4145 36. The daemon start-up calls getloadavg() while still root for those OS that
4146 need the first call to be done as root, but it missed one case: when
4147 deliver_queue_load_max is set with deliver_drop_privilege. This is
4148 necessary for the benefit of the queue runner, because there is no re-exec
4149 when deliver_drop_privilege is set.
4151 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4152 was in use, was not putting the data itself into the right store pool;
4153 consequently, it could be overwritten for a subsequent message in the same
4154 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4157 38. Sometimes the final signoff response after QUIT could fail to get
4158 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4159 < 0 before doing a fflush(). This bug looks as though it goes back to the
4160 introduction of TLS in release 3.20, but "sometimes" must have been rare
4161 because the tests only now provoked it.
4167 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4168 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4169 Now it returns an integer. A number of calls were still expecting a T/F
4170 return. Fortuitously, in all cases, the tests worked in OK situations,
4171 which is the norm. However, things would have gone wrong on any write
4172 failures on the smtp file descriptor. This function is used when sending
4173 messages over SMTP and also when doing verify callouts.
4175 2. When Exim is called to do synchronous delivery of a locally submitted
4176 message (the -odf or -odi options), it no longer closes stderr before doing
4179 3. Implemented the mua_wrapper option.
4181 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4183 5. Implemented the functions header_remove(), header_testname(),
4184 header_add_at_position(), and receive_remove_recipient(), and exported them
4187 6. If an ACL "warn" statement specified the addition of headers, Exim already
4188 inserted X-ACL-Warn: at the start if there was no header name. However, it
4189 was not making this test for the second and subsequent header lines if
4190 there were newlines in the string. This meant that an invalid header could
4191 be inserted if Exim was badly configured.
4193 7. Allow an ACL "warn" statement to add header lines at the start or after all
4194 the Received: headers, as well as at the end.
4196 8. Added the rcpt_4xx retry error code.
4198 9. Added postmaster_mailfrom=xxx to callout verification option.
4200 10. Added mailfrom=xxxx to the callout verification option, for verify=
4203 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4204 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4206 12. Inserted some casts to stop certain compilers warning when using pointer
4207 differences as field lengths or precisions in printf-type calls (mostly
4208 affecting debugging statements).
4210 13. Added optional readline() support for -be (dynamically loaded).
4212 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4213 same clock tick as a message's arrival, so that its received time was the
4214 same as the "first fail" time on the retry record, and that message
4215 remained on the queue past the ultimate address timeout, every queue runner
4216 would try a delivery (because it was past the ultimate address timeout) but
4217 after another failure, the ultimate address timeout, which should have then
4218 bounced the address, did not kick in. This was a "< instead of <=" error;
4219 in most cases the first failure would have been in the next clock tick
4220 after the received time, and all would be well.
4222 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4223 being recognized when the domain list was tested by the match_domain
4224 condition in an expansion string.
4226 16. Added the ${str2b64: operator.
4228 17. Exim was always calling setrlimit() to set a large limit for the number of
4229 processes, without checking whether the existing limit was already
4230 adequate. (It did check for the limit on file descriptors.) Furthermore,
4231 errors from getrlimit() and setrlimit() were being ignored. Now they are
4232 logged to the main and panic logs, but Exim does carry on, to try to do its
4233 job under whatever limits there are.
4235 18. Imported PCRE 5.0.
4237 19. Trivial typo in log message " temporarily refused connection" (the leading
4240 20. If the log selector return_path_on_delivery was set and an address was
4241 redirected to /dev/null, the delivery process crashed because it assumed
4242 that a return path would always be set for a "successful" delivery. In this
4243 case, the whole delivery is bypassed as an optimization, and therefore no
4246 21. Internal re-arrangement: the function for sending a challenge and reading
4247 a response while authentication was assuming a zero-terminated challenge
4248 string. It's now changed to take a pointer and a length, to allow for
4249 binary data in such strings.
4251 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4253 23. Exim was not respecting finduser_retries when seeking the login of the
4254 uid under which it was called; it was always trying 10 times. (The default
4255 setting of finduser_retries is zero.) Also, it was sleeping after the final
4256 failure, which is pointless.
4258 24. Implemented tls_on_connect_ports.
4260 25. Implemented acl_smtp_predata.
4262 26. If the domain in control=submission is set empty, Exim assumes that the
4263 authenticated id is a complete email address when it generates From: or
4264 Sender: header lines.
4266 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4267 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4268 chown and chgrp in /bin and hostname in /usr/bin.
4270 28. Exim was keeping the "process log" file open after each use, just as it
4271 does for the main log. This opens the possibility of it remaining open for
4272 long periods when the USR1 signal hits a daemon. Occasional processlog
4273 errors were reported, that could have been caused by this. Anyway, it seems
4274 much more sensible not to leave this file open at all, so that is what now
4277 29. The long-running daemon process does not normally write to the log once it
4278 has entered its main loop, and it closes the log before doing so. This is
4279 so that log files can straightforwardly be renamed and moved. However,
4280 there are a couple of unusual error situations where the daemon does write
4281 log entries, and I had neglected to close the log afterwards.
4283 30. The text of an SMTP error response that was received during a remote
4284 delivery was being truncated at 512 bytes. This is too short for some of
4285 the long messages that one sometimes sees. I've increased the limit to
4288 31. It is now possible to make retry rules that apply only when a message has a
4289 specific sender, in particular, an empty sender.
4291 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4292 it possible to be selective about when SMTP synchronization is enforced.
4294 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4296 32. Implemented hosts_connection_nolog.
4298 33. Added an ACL for QUIT.
4300 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4303 35. Added mailbox_size and mailbox_filecount to appendfile.
4305 36. Added control = no_multiline_responses to ACLs.
4307 37. There was a bug in the logic of the code that waits for the clock to tick
4308 in the case where the clock went backwards by a substantial amount such
4309 that the microsecond fraction of "now" was more than the microsecond
4310 fraction of "then" (but the whole seconds number was less).
4312 38. Added support for the libradius Radius client library this is found on
4313 FreeBSD (previously only the radiusclient library was supported).
4319 1. When certain lookups returned multiple values in the form name=value, the
4320 quoting of the values was not always being done properly. Specifically:
4321 (a) If the value started with a double quote, but contained no whitespace,
4323 (b) If the value contained whitespace other than a space character (i.e.
4324 tabs or newlines or carriage returns) it was not quoted.
4325 This fix has been applied to the mysql and pgsql lookups by writing a
4326 separate quoting function and calling it from the lookup code. The fix
4327 should probably also be applied to nisplus, ibase and oracle lookups, but
4328 since I cannot test any of those, I have not disturbed their existing code.
4330 2. A hit in the callout cache for a specific address caused a log line with no
4331 reason for rejecting RCPT. Now it says "Previous (cached) callout
4332 verification failure".
4334 3. There was an off-by-one bug in the queryprogram router. An over-long
4335 return line was truncated at 256 instead of 255 characters, thereby
4336 overflowing its buffer with the terminating zero. As well as fixing this, I
4337 have increased the buffer size to 1024 (and made a note to document this).
4339 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4340 when Exim is waiting for an SMTP response from a remote server, Exim
4341 restarts its select() call on the socket, thereby resetting its timeout.
4342 This is not a problem when such interrupts are rare. Somebody set up a cron
4343 job to run exiwhat every 2 minutes, which is less than the normal select()
4344 timeout (5 or 10 minutes). This meant that the select() timeout never
4345 kicked in because it was always reset. I have fixed this by comparing the
4346 time when an interrupt arrives with the time at the start of the first call
4347 to select(). If more time than the timeout has elapsed, the interrupt is
4348 treated as a timeout.
4350 5. Some internal re-factoring in preparation for the addition of Sieve
4351 extensions (by MH). In particular, the "personal" test is moved to a
4352 separate function, and given an option for scanning Cc: and Bcc: (which is
4353 not set for Exim filters).
4355 6. When Exim created an email address using the login of the caller as the
4356 local part (e.g. when creating a From: or Sender: header line), it was not
4357 quoting the local part when it contained special characters such as @.
4359 7. Installed new OpenBSD configuration files.
4361 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4362 try to make them clearer.
4364 9. Callout options, other than the timeout value, were being ignored when
4365 verifying sender addresses in header lines. For example, when using
4367 verify = header_sender/callout=no_cache
4369 the cache was (incorrectly) being used.
4371 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4372 only the Cygwin environment.
4374 11. When return_path_on_delivery was set as a log selector, if different remote
4375 addresses in the same message used different return paths and parallel
4376 remote delivery occurred, the wrong values would sometimes be logged.
4377 (Whenever a remote delivery process finished, the return path value from
4378 the most recently started remote delivery process was logged.)
4380 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4381 lines when AUTH and/or TLS are in use. This is the "received protocol"
4382 field. Exim used to use "asmtp" for authenticated SMTP, without any
4383 indication (in the protocol name) for TLS use. Now it follows the RFC and
4384 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4385 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4386 names appear in log lines as well as in Received: header lines.
4388 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4389 extensions, and comparison tests, and to fix some bugs.
4391 14. Changes to the "personal" filter test:
4393 (1) The test was buggy in that it was just doing the equivalent of
4394 "contains" tests on header lines. For example, if a user's address was
4395 anne@some.where, the "personal" test would incorrectly be true for
4397 To: susanne@some.where
4399 This test is now done by extracting each address from the header in turn,
4400 and checking the entire address. Other tests that are part of "personal"
4401 are now done using regular expressions (for example, to check local parts
4402 of addresses in From: header lines).
4404 (2) The list of non-personal local parts in From: addresses has been
4405 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4406 taken from the Sieve specification recommendations.
4408 (3) If the message contains any header line starting with "List-" it is
4409 treated as non-personal.
4411 (4) The test for "circular" in the Subject: header line has been removed
4412 because it now seems ill-conceived.
4414 15. Minor typos in src/EDITME comments corrected.
4416 16. Installed latest exipick from John Jetmore.
4418 17. If headers_add on a router specified a text string that was too long for
4419 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4420 of string_sprintf() is now avoided.
4422 18. $message_body_size was not set (it was always zero) when running the DATA
4423 ACL and the local_scan() function.
4425 19. For the "mail" command in an Exim filter, no default was being set for
4426 the once_repeat time, causing a random time value to be used if "once" was
4427 specified. (If the value happened to be <= 0, no repeat happened.) The
4428 default is now 0s, meaning "never repeat". The "vacation" command was OK
4429 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4430 (I found it when inspecting the code).
4432 20. There is now an overall timeout for performing a callout verification. It
4433 defaults to 4 times the callout timeout, which applies to individual SMTP
4434 commands during the callout. The overall timeout applies when there is more
4435 than one host that can be tried. The timeout is checked before trying the
4436 next host. This prevents very long delays if there are a large number of
4437 hosts and all are timing out (e.g. when the network connections are timing
4438 out). The value of the overall timeout can be changed by specifying an
4439 additional sub-option for "callout", called "maxwait". For example:
4441 verify = sender/callout=5s,maxwait=20s
4443 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4444 to the end before writing, but this should make it even safer).
4446 22. Exim was forgetting that it had advertised PIPELINING for the second and
4447 subsequent messages on an SMTP connection. It was also not resetting its
4448 memory on STARTTLS and an internal HELO.
4450 23. When Exim logs an SMTP synchronization error within a session, it now
4451 records whether PIPELINING has been advertised or not.
4453 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4454 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4455 rather than long int.
4457 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4459 26. Added the never_mail option to autoreply.
4465 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4466 crash if the getsockname() call failed; this can happen if a connection is
4467 closed very soon after it is established. The problem was simply in the
4468 order in which certain operations were done, causing Exim to try to write
4469 to the SMTP stream before it had set up the file descriptor. The bug has
4470 been fixed by making things happen in the correct order.
4476 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4477 before the connection was closed, thus losing the rejection response.
4479 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4480 some early Solaris releases, but causes trouble in current releases where
4481 socklen_t is defined.
4483 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4486 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4489 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4490 that releasing the top of it at the end releases what was used for sub-
4491 expansions (unless the block got too big). However, discard this block if
4492 the first thing is a variable or header, so that we can use its block when
4493 it is dynamic (useful for very large $message_headers, for example).
4495 6. Lookups now cache *every* query, not just the most recent. A new, separate
4496 store pool is used for this. It can be recovered when all lookup caches are
4497 flushed. Lookups now release memory at the end of their result strings.
4498 This has involved some general refactoring of the lookup sources.
4500 7. Some code has been added to the store_xxx() functions to reduce the amount
4501 of flapping under certain conditions.
4503 8. log_incoming_interface used to affect only the <= reception log lines. Now
4504 it causes the local interface and port to be added to several more SMTP log
4505 lines, for example "SMTP connection from", and rejection lines.
4507 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4509 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4511 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4512 could be overwritten at the end of the current message (or the start of a
4513 new message if it was set in a HELO ACL). The value is now preserved for
4514 the duration of the SMTP connection.
4516 12. If a transport had a headers_rewrite setting, and a matching header line
4517 contained an unqualified address, that address was qualified, even if it
4518 did not match any rewriting rules. The underlying bug was that the values
4519 of the flags that permit the existence of unqualified sender and recipient
4520 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4521 non-local messages, and by -bnq for local messages) were not being
4522 preserved with the message after it was received.
4524 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4525 "next input=" as part of the text comprising the host identity instead of
4526 the correct text. The code was using the same buffer for two different
4527 strings. However, depending on which order the printing function evaluated
4528 its arguments, the bug did not always show up. Under Linux, for example, my
4529 test suite worked just fine.
4531 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4532 doesn't work with some older versions of Perl. It has been changed to "my",
4533 which in any case is probably the better facility to use.
4535 15. A really picky compiler found some instances of statements for creating
4536 error messages that either had too many or two few arguments for the format
4539 16. The size of the buffer for calls to the DNS resolver has been increased
4540 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4541 for addresses that have a lot of PTR records. This alleviates a problem; it
4542 does not fully solve it.
4544 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4545 buffer now truncates the list and logs the incident, which is the same
4546 action as happens when Exim is looking up a host name and its aliases.
4547 Previously in this situation something unpredictable would happen;
4548 sometimes it was "internal error: store_reset failed".
4550 18. If a server dropped the connection unexpectedly when an Exim client was
4551 using GnuTLS and trying to read a response, the client delivery process
4552 crashed while trying to generate an error log message.
4554 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4555 string, for example:
4557 warn message = H1: something\nH2: something
4559 the text was added as a single header line from Exim's point of view
4560 though it ended up OK in the delivered message. However, searching for the
4561 second and subsequent header lines using $h_h2: did not work. This has been
4562 fixed. Similarly, if a system filter added multiple headers in this way,
4563 the routers could not see them.
4565 20. Expanded the error message when iplsearch is called with an invalid key to
4566 suggest using net-iplsearch in a host list.
4568 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4569 ACLs are no longer actually imposed (and a message to that effect is
4572 22. If a "gecos" field in a passwd entry contained escaped characters, in
4573 particular, if it contained a \" sequence, Exim got it wrong when building
4574 a From: or a Sender: header from that name. A second bug also caused
4575 incorrect handling when an unquoted " was present following a character
4576 that needed quoting.
4578 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4579 was not being matched caselessly.
4581 24. Arranged for all hyphens in the exim.8 source to be escaped with
4584 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4585 properly. Recipient callout cache records were still being keyed to include
4586 the sender, even when use_sender was set false. This led to far more
4587 callouts that were necessary. The sender is no longer included in the key
4588 when use_sender is false.
4590 26. Added "control = submission" modifier to ACLs.
4592 27. Added the ${base62d: operator to decode base 62 numbers.
4594 28. dnsdb lookups can now access SRV records.
4596 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4597 the configuration file.
4599 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4600 (-v) mode. This makes the output for a verbose queue run more intelligible.
4602 31. Added a use_postmaster feature to recipient callouts.
4604 32. Added the $body_zerocount variable, containing the number of binary zero
4605 bytes in the message body.
4607 33. The time of last modification of the "new" subdirectory is now used as the
4608 "mailbox time last read" when there is a quota error for a maildir
4611 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4613 35. Added +ignore_unknown as a special item in host lists.
4615 36. Code for decoding IPv6 addresses in host lists is now included, even if
4616 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4617 address was recognized as an IP address, but was then not correctly decoded
4618 into binary, causing unexpected and incorrect effects when compared with
4625 1. Very minor rewording of debugging text in manualroute to say "list of
4626 hosts" instead of "hostlist".
4628 2. If verify=header_syntax was set, and a header line with an unqualified
4629 address (no domain) and a large number of spaces between the end of the
4630 name and the colon was received, the reception process suffered a buffer
4631 overflow, and (when I tested it) crashed. This was caused by some obsolete
4632 code that should have been removed. The fix is to remove it!
4634 3. When running in the test harness, delay a bit after writing a bounce
4635 message to get a bit more predictability in the log output.
4637 4. Added a call to search_tidyup() just before forking a reception process. In
4638 theory, someone could use a lookup in the expansion of smtp_accept_max_
4639 per_host which, without the tidyup, could leave open a database connection.
4641 5. Added the variables $recipient_data and $sender_data which get set from a
4642 lookup success in an ACL "recipients" or "senders" condition, or a router
4643 "senders" option, similar to $domain_data and $local_part_data.
4645 6. Moved the writing of debug_print from before to after the "senders" test
4648 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4649 problems for message scanning, either using a data ACL, or using
4650 local_scan() because the Received: header was not generated till after they
4651 were called (in order to set the time as the time of reception completion).
4652 I have revised the way this works. The header is now generated after the
4653 body is received, but before the ACL or local_scan() are called. After they
4654 are run, the timestamp in the header is updated.
4660 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4661 before starting a queue runner without re-exec. This happened only when
4662 deliver_drop_privilege was set or when the Exim user was set to root. The
4663 effect of the bug was that timeouts during subsequent deliveries caused
4664 crashes instead of being properly handled. The handler is now left at its
4665 default (and expected) setting.
4667 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4668 message, again when deliver_drop_privilege is set or Exim is run as root.
4669 The bug described in (1) was not present in this case, but the tidying up
4670 of the other signals was missing. I have made the two cases consistent.
4672 3. The ignore_target_hosts setting on a manualroute router was being ignored
4673 for hosts that were looked up using the /MX notation.
4675 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4678 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4679 operated on the sender address. After changing the $sender_address to <>
4680 for the sender address verify, Exim was re-instated it as the original
4681 (before rewriting) address, but remembering that it had rewritten it, so it
4682 wasn't rewriting it again. This bug also had the effect of breaking the
4683 sender address verification caching when the sender address was rewritten.
4685 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4686 This has been changed so that if the ip literal address matches
4687 ignore_target_hosts, the router declines.
4689 7. Added expansion conditions match_domain, match_address, and match_local_
4690 part (NOT match_host).
4692 8. The placeholder for the Received: header didn't have a length field set.
4694 9. Added code to Exim itself and to exim_lock to test for a specific race
4695 condition that could lead to file corruption when using MBX delivery. The
4696 issue is with the lockfile that is created in /tmp. If this file is removed
4697 after a process has opened it but before that process has acquired a lock,
4698 there is the potential for a second process to recreate the file and also
4699 acquire a lock. This could lead to two Exim processes writing to the file
4700 at the same time. The added code performs the same test as UW imapd; it
4701 checks after acquiring the lock that its file descriptor still refers to
4702 the same named file.
4704 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4705 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4708 11. Added the smtp_active_hostname option. If used, this will typically be made
4709 to depend on the incoming interface address. Because $interface_address is
4710 not set up until the daemon has forked a reception process, error responses
4711 that can happen earlier (such as "too many connections") no longer contain
4714 12. If an expansion in a condition on a "warn" statement fails because a lookup
4715 defers, the "warn" statement is abandoned, and the next ACL statement is
4716 processed. Previously this caused the whole ACL to be aborted.
4718 13. Added the iplsearch lookup type.
4720 14. Added ident_timeout as a log selector.
4722 15. Added tls_certificate_verified as a log selector.
4724 16. Added a global option tls_require_ciphers (compare the smtp transport
4725 option of the same name). This controls incoming TLS connections.
4727 17. I finally figured out how to make tls_require_ciphers do a similar thing
4728 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4729 before starting the TLS session.
4731 18. Tabs are now shown as \t in -bP output.
4733 19. If the log selector return_path_on_delivery was set, Exim crashed when
4734 bouncing a message because it had too many Received: header lines.
4736 20. If two routers both had headers_remove settings, and the first one included
4737 a superfluous trailing colon, the final name in the first list and the
4738 first name in the second list were incorrectly joined into one item (with a
4739 colon in the middle).
4745 1. Added -C and -D options to the exinext utility, mainly to make it easier
4746 to include in the automated testing, but these could be helpful when
4747 multiple configurations are in use.
4749 2. The exinext utility was not formatting the output nicely when there was
4750 an alternate port involved in the retry record key, nor when there was a
4751 message id as well (for retries that were specific to a specific message
4752 and a specific host). It was also confused by IPv6 addresses, because of
4753 the additional colons they contain. I have fixed the IPv4 problem, and
4754 patched it up to do a reasonable job for IPv6.
4756 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4757 delivery, the log line now contains "pipelined" if PIPELINING was used.
4759 4. An SMTP transport process used to panic and die if the bind() call to set
4760 an explicit outgoing interface failed. This has been changed; it is now
4761 treated in the same way as a connect() failure.
4763 5. A reference to $sender_host_name in the part of a conditional expansion
4764 that was being skipped was still causing a DNS lookup. This no longer
4767 6. The def: expansion condition was not recognizing references to header lines
4768 that used bh_ and bheader_.
4770 7. Added the _cache feature to named lists.
4772 8. The code for checking quota_filecount in the appendfile transport was
4773 allowing one more file than it should have been.
4775 9. For compatibility with Sendmail, the command line option
4783 and sets the incoming protocol and host name (for trusted callers). The
4784 host name and its colon can be omitted when only the protocol is to be set.
4785 Note the Exim already has two private options, -pd and -ps, that refer to
4786 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4787 "s", but I don't think that's a major issue.
4789 10. A number of refactoring changes to the code, none of which should affect
4792 (a) The number of logging options was getting close to filling up the
4793 32-bit word that was used as a bit map. I have split them into two classes:
4794 those that are passed in the argument to log_write(), and those that are
4795 only ever tested independently outside of that function. These are now in
4796 separate 32-bit words, so there is plenty of room for expansion again.
4797 There is no change in the user interface or the logging behaviour.
4799 (b) When building, for example, log lines, the code previously used a
4800 macro that called string_cat() twice, in order to add two strings. This is
4801 not really sufficiently general. Furthermore, there was one instance where
4802 it was actually wrong because one of the argument was used twice, and in
4803 one call a function was used. (As it happened, calling the function twice
4804 did not affect the overall behaviour.) The macro has been replaced by a
4805 function that can join an arbitrary number of extra strings onto a growing
4808 (c) The code for expansion conditions now uses a table and a binary chop
4809 instead of a serial search (which was left over from when there were very
4810 few conditions). Also, it now recognizes conditions like "pam" even when
4811 the relevant support is not compiled in: a suitably worded error message is
4812 given if an attempt is made to use such a condition.
4814 11. Added ${time_interval:xxxxx}.
4816 12. A bug was causing one of the ddress fields not to be passed back correctly
4817 from remote delivery subprocesses. The field in question was not being
4818 subsequently used, so this caused to problems in practice.
4820 13. Added new log selectors queue_time and deliver_time.
4822 14. Might have fixed a bug in maildirsizefile handling that threw up
4823 "unexpected character" debug warnings, and recalculated the data
4824 unnecessarily. In any case, I expanded the warning message to give more
4827 15. Added the message "Restricted characters in address" to the statements in
4828 the default ACL that block characters like @ and % in local parts.
4830 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4831 Three changes have been made:
4833 (a) There was a serious bug; a negative response to MAIL caused the whole
4834 recipient domain to be cached as invalid, thereby blocking all messages
4835 to all local parts at the same domain, from all senders. This bug has
4836 been fixed. The domain is no longer cached after a negative response to
4837 MAIL if the sender used is not empty.
4839 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4842 (c) A new callout option, "use_sender" has been added for people who want
4843 the modified behaviour.
4849 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4852 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4853 indeed breaks things for older releases.
4855 3. Added additional logging to the case where there is a problem reading data
4856 from a filter that is running in a subprocess using a pipe, in order to
4857 try to track down a specific problem.
4859 4. Testing facility fudge: when running in the test harness and attempting
4860 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4861 getting "No route to host". Convert this to a timeout.
4863 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4866 6. Some OS don't have socklen_t but use size_t instead. This affects the
4867 fifth argument of getsockopt() amongst other things. This is now
4868 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4869 can be set for individual OS. I have set it for SunOS5, OSF1, and
4870 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4871 some earlier ones do not.
4873 7. Change 4.30/15 was not doing the test caselessly.
4875 8. The standard form for an IPv6 address literal was being rejected by address
4876 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4877 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4878 this, as well as the form without the "IPv6" on the front (but only when
4879 address literals are enabled, of course).
4881 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4883 10. Exim crashed if a message with an empty sender address specified by -f
4884 encountered a router with an errors_to setting. This could be provoked only
4885 by a command such as
4889 where an empty string was supplied; "<>" did not hit this bug.
4891 11. Installed PCRE release 4.5.
4893 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4894 remained set. It is now erased.
4896 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4897 times from message ids (which are base 36 rather than the normal 62).
4899 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4900 were being counted as actual protocol errors, and logged if the log
4901 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4902 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4903 and DATA following a set of rejected RCPTs do not count as protocol errors.
4904 In other words, Exim assumes they were pipelined, though this may not
4905 actually be the case. Of course, in all cases the client gets an
4906 appropriate error code.
4908 15. If a lookup fails in an ACL condition, a message about the failure may
4909 be available; it is used if testing the ACL cannot continue, because most
4910 such messages specify what the cause of the deferral is. However, some
4911 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4912 that caused an old message to be retained and used if a later statement
4913 caused a defer, replacing the real cause of the deferral.
4915 16. If an IP address had so many PTR records that the DNS lookup buffer
4916 was not large enough to hold them, Exim could crash while trying to process
4917 the truncated data. It now detects and logs this case.
4919 17. Further to 4.21/58, another change has been made: if (and only if) the
4920 first line of a message (the first header line) ends with CRLF, a bare LF
4921 in a subsequent header line has a space inserted after it, so as not to
4922 terminate the header.
4924 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4925 unnecessarily, used atoi() instead of strtol(), and didn't check the
4926 termination when getting file sizes from file names by regex.
4928 19. Completely re-implemented the support for maildirsize files, in the light
4929 of a number of problems with the previous contributed implementation
4930 (4.30/29). In particular:
4932 . If the quota is zero, the maildirsize file is maintained, but no quota is
4935 . If the maildir directory does not exist, it is created before any attempt
4936 to write a maildirsize file.
4938 . The quota value in the file is just a cache; if the quota is changed in
4939 the transport, the new value overrides.
4941 . A regular expression is available for excluding directories from the
4944 20. The autoreply transport checks the characters in options that define the
4945 message's headers; it allows continued headers, but it was checking with
4946 isspace() after an embedded newline instead of explicitly looking for a
4949 21. If all the "regular" hosts to which an address was routed had passed their
4950 expiry times, and had not reached their retry times, the address was
4951 bounced, even if fallback hosts were defined. Now Exim should go on to try
4954 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4955 equivalent code in the SMTP transport. Some hosts send humungous responses
4956 to HELO/EHLO, more than 1024 it seems.
4958 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4959 gives compiler warnings in some environments. I've now done it "properly",
4962 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4963 (because of problems with the built-in one) was declared to return uschar *
4964 instead of char *, causing compiler failure.
4966 25. Fixed a file descriptor leak when processing alias/forward files.
4968 26. Fixed a minor format string issue in dbfn.c.
4970 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4972 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4973 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4976 29. When a sender address is verified, it is cached, to save repeating the test
4977 when there is more than one recipient in a message. However, when the
4978 verification involves a callout, it is possible for different callout
4979 options to be set for different recipients. It is too complicated to keep
4980 track of this in the cache, so now Exim always runs a verification when a
4981 callout is required, relying on the callout cache for the optimization.
4982 The overhead is duplication of the address routing, but this should not be
4985 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4986 to be verified with callout=postmaster, and the main callout worked but the
4987 postmaster check failed, the verification correctly failed. However, if a
4988 subsequent RCPT command asked for sender verification *without* the
4989 postmaster check, incorrect caching caused this verification also to fail,
4992 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4993 it was not caching the DNS options (qualify_single, search_parents) that
4994 were used when the lookup failed. A subsequent lookup with different
4995 options therefore always gave the same answer, though there were cases
4996 where it should not have. (Example: a "domains = !$mx_any" option on a
4997 dnslookup router: the "domains" option is always processed without any
4998 widening, but the router might have qualify_single set.) Now Exim uses the
4999 cached value only when the same options are set.
5001 32. Added John Jetmore's "exipick" utility to the distribution.
5003 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5004 than a timeout (e.g. a certificate is required, and is not provided), an
5005 Exim server now closes the connection immediately. Previously it waited for
5006 the client to close - but if the client is SSL, it seems that they each
5007 wait for each other, leading to a delay before one of them times out.
5009 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5010 maintained 0.8.x compatibility because I don't think many are using it, and
5011 it is clearly obsolete.
5013 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5016 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5017 client certificate was expired. A simple patch fixes this, though I don't
5018 understand the full logic of why the verify callback is called multiple
5021 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5022 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5023 which causes problems with some clients (such as the Certicom SSL Plus
5024 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5025 disables the coutermeasure allowing Eudora to connect."
5027 38. Exim was not checking that a write() to a log file succeeded. This could
5028 lead to Bad Things if a log got too big, in particular if it hit a file
5029 size limit. Exim now panics and dies if it cannot write to a log file, just
5030 as it does if it cannot open a log file.
5032 39. Modified OS/Makefile-Linux so that it now contains
5034 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5036 The two -D definitions ensure that Exim is compiled with large file
5037 support, which makes it possible to handle log files that are bigger than
5040 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5041 instance) a domain was checked against a named list that involved a lookup,
5042 causing $domain_data to be set, then another domain was checked against the
5043 same list, then the first domain was re-checked, the value of $domain_data
5044 after the final check could be wrong. In particular, if the second check
5045 failed, it could be set empty. This bug probably also applied to
5048 41. The strip_trailing_dot option was not being applied to the address given
5049 with the -f command-line option.
5051 42. The code for reading a message's header from the spool was incrementing
5052 $received_count, but never initializing it. This meant that the value was
5053 incorrect (doubled) while delivering a message in the same process in which
5054 it was received. In the most common configuration of Exim, this never
5055 happens - a fresh exec is done - but it can happen when
5056 deliver_drop_privilege is set.
5058 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5059 it now includes up to 150 characters of the unexpected data in the log
5062 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5063 and building data strings. The size of both of these buffers was 10 000
5064 bytes - far larger than anybody would *ever* want, thought I. Needless to
5065 say, somebody hit the limit. I have increased the maximum line length to
5066 20 000 and the maximum data length of concatenated lines to 100 000. I have
5067 also fixed two bugs, because there was no checking on these buffers. Tsk,
5068 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5069 buffer is too small.
5071 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5072 lsearch lookups. Now it does.
5074 46. When parsing a route_list item in a manualroute router, a fixed-length
5075 buffer was used for the list of hosts. I made this 1024 bytes long,
5076 thinking that nobody would ever have a list of hosts that long. Wrong.
5077 Somebody had a whole pile of complicated expansion conditions, and the
5078 string was silently truncated, leading to an expansion error. It turns out
5079 that it is easier to change to an unlimited length (owing to other changes
5080 that have happened since this code was originally written) than to build
5081 structure for giving a limitation error. The length of the item that
5082 expands into the list of hosts is now unlimited.
5084 47. The lsearch lookup could not handle data where the length of text line was
5085 more than 4095 characters. Such lines were truncated, leading to shortened
5086 data being returned. It should now handle lines of any length.
5088 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5089 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5092 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5093 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5094 no longer happens in comment lines. A list of replacements is now placed
5095 at the head of all of the source files, except those whose only change is
5096 to replace PERL_COMMAND in the very first #! line.
5098 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5099 messages on the queue, with a bottom-up merge sort, using code contributed
5100 by Michael Haardt. This should make operations like -bp somewhat faster on
5101 large queues. It won't affect queue runners, except when queue_run_in_order
5104 51. Installed eximstats 1.31 in the distribution.
5106 52. Added support for SRV lookups to the dnslookup router.
5108 53. If an ACL referred to $message_body or $message_body_end, the value was not
5109 reset for any messages that followed in the same SMTP session.
5111 54. The store-handling optimization for building very long strings was not
5112 differentiating between the different store pools. I don't think this
5113 actually made any difference in practice, but I've tidied it.
5115 55. While running the routers to verify a sender address, $sender_address
5116 was still set to the sender address. This is wrong, because when routing to
5117 send a bounce to the sender, it would be empty. Therefore, I have changed
5118 it so that, while verifying a sender address, $sender_address is set to <>.
5119 (There is no change to what happens when verifying a recipient address.)
5121 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5122 target A or AAAA records (if not already returned) without resetting the
5123 qualify_single or search_parents options of the DNS resolver. These are
5124 inappropriate in this case because the targets of MX and SRV records must
5125 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5126 target that, when qualified, matched something in the local domain. These
5127 two options are now turned off when doing these lookups.
5129 57. It seems that at least some releases of Reiserfs (which does not have the
5130 concept of a fixed number of inodes) returns zero and not -1 for the
5131 number of available inodes. This interacted badly with check_spool_inodes,
5132 which assumed that -1 was the "no such thing" setting. What I have done is
5133 to check that the total number of inodes is greater than zero before doing
5134 the test of how many are available.
5136 58. When a "warn" ACL statement has a log_message modifier, the message is
5137 remembered, and not repeated. This is to avoid a lot of repetition when a
5138 message has many recipients that cause the same warning to be written.
5139 Howewer, Exim was preserving the list of already written lines for an
5140 entire SMTP session, which doesn't seem right. The memory is now reset if a
5141 new message is started.
5143 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5144 debugging output unless log_rewrite was also set.
5146 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5147 of (int)(handle) when we know that handle contains (void *)(-1).
5149 61. The Exim daemon panic-logs an error return when it closes the incoming
5150 connection. However "connection reset by peer" seems to be common, and
5151 isn't really an error worthy of noting specially, so that particular error
5154 62. When Exim is trying to find all the local interfaces, it used to panic and
5155 die if the ioctl to get the interface flags failed. However, it seems that
5156 on at least one OS (Solaris 9) it is possible to have an interface that is
5157 included in the list of interfaces, but for which you get a failure error
5158 for this call. This happens when the interface is not "plumbed" into a
5159 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5160 failure of the "get flags" call assumes that the interface is down.
5162 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5163 makes life easier for people who are doing arithmetic on fields extracted
5164 from dates, where you often get leading zeros that should not be
5165 interpreted as octal.
5167 64. Added qualify_domain to the redirect router, to override the global
5170 65. If a pathologically long header line contained very many addresses (the
5171 report of this problem mentioned 10 000) and each of them was rewritten,
5172 Exim could use up a very large amount of memory. (It kept on making new
5173 copies of the header line as it rewrote, and never released the old ones.)
5174 At the expense of a bit more processing, the header rewriting function has
5175 been changed so that it no longer eats memory in this way.
5177 66. The generation of the Received: header has been moved from the time that a
5178 message starts to be received, to the time that it finishes. The timestamp
5179 in the Received: header should now be very close to that of the <= log
5180 line. There are two side-effects of this change:
5182 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5183 logged header lines no longer include the local Received: line, because
5184 it has not yet been created. The same applies to a copy of the message
5185 that is returned to a non-SMTP sender when a message is rejected.
5187 (b) When a filter file is tested using -bf, no additional Received: header
5188 is added to the test message. After some thought, I decided that this
5191 This change does not affect the value of $received_for. It is still set
5192 after address rewriting, but before local_scan() is called.
5194 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5196 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5197 gave an unhelpful panic error message, and a defer error. I have managed to
5198 change this behaviour so that it now rejects any supplied certificate,
5199 which seems right, as the list of acceptable certificates is empty.
5201 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5202 gave an unhelpful defer error. I have not managed to make this reject any
5203 supplied certificates, but the error message it gives is "no certificate
5204 supplied", which is not helpful.
5206 70. exigrep's output now also includes lines that are not associated with any
5207 message, but which match the given pattern. Implemented by a patch from
5208 Martin Sluka, which also tidied up the Perl a bit.
5210 71. Recipient callout verification, like sender verification, was using <> in
5211 the MAIL FROM command. This isn't really the right thing, since the actual
5212 sender may affect whether the remote host accepts the recipient or not. I
5213 have changed it to use the actual sender in the callout; this means that
5214 the cache record is now keyed on a recipient/sender pair, not just the
5215 recipient address. There doesn't seem to be a real danger of callout loops,
5216 since a callout by the remote host to check the sender would use <>.
5217 [SEE ABOVE: changed after hitting problems.]
5219 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5220 temporary errors. However, in the case of such a code being given after
5221 the end of a data transmission (i.e. after ".") Exim was failing to write
5222 a retry record for the message. (Yes, there was some broken host that was
5223 actually sending 8xx at this point.)
5225 73. An unknown lookup type in a host list could cause Exim to panic-die when
5226 the list was checked. (An example that provoked this was putting <; in the
5227 middle of a list instead of at the start.) If this happened during a DATA
5228 ACL check, a -D file could be left lying around. This kind of configuration
5229 error no longer causes Exim to die; instead it causes a defer errror. The
5230 incident is still logged to the main and panic logs.
5232 74. Buglet left over from Exim 3 conversion. The message "too many messages
5233 in one connection" was written to the rejectlog but not the mainlog, except
5234 when address rewriting (yes!) was being logged.
5236 75. Added write_rejectlog option.
5238 76. When a system filter was run not as root (that is, when system_filter_user
5239 was set), the values of the $n variables were not being returned to the
5240 main process; thus, they were not subsequently available in the $sn
5243 77. Added +return_path_on_delivery log selector.
5245 78. A connection timeout was being treated differently from recipients deferred
5246 when testing hosts_max_try with a message that was older than the host's
5247 retry timeout. (The host should not be counted, thus allowing all hosts to
5248 be tried at least once before bouncing.) This may have been the cause of an
5249 occasionally reported bug whereby a message would remain on the queue
5250 longer than the retry timeout, but would be bounced if a delivery was
5251 forced. I say "may" because I never totally pinned down the problem;
5252 setting up timeout/retry tests is difficult. See also the next item.
5254 79. The ultimate address timeout was not being applied to errors that involved
5255 a combination of host plus message (for example, a timeout on a MAIL
5256 command). When an address resolved to a number of possible hosts, and they
5257 were not all tried for each delivery (e.g. because of hosts_max_try), a
5258 message could remain on the queue longer than the retry timeout.
5260 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5263 81. Fixed an obscure SMTP outgoing bug which required at least the following
5264 conditions: (a) there was another message waiting for the same server;
5265 (b) the server returned 5xx to all RCPT commands in the first message so
5266 that the message was not completed; (c) the server dropped the connection
5267 or gave a negative response to the RSET that Exim sends to abort the
5268 transaction. The observed case was a dropped connection after DATA that had
5269 been sent in pipelining mode. That is, the server had advertised PIPELINING
5270 but was not implementing it correctly. The effect of the bug was incorrect
5271 behaviour, such as trying another host, and this could lead to a crash.
5277 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5278 and daemon.c were passed as pointers to ints; they should have been
5279 pointers to socklen_t variables (which are typically unsigned ints).
5281 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5284 3. Fixed a really odd bug that affected only the testing scheme; patching a
5285 certain fixed string in the binary changed the value of another string that
5286 happened to be identical to the end of the original first string.
5288 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5289 name", it returns that address as the IP address. On some operating
5290 systems (e.g. Solaris), it also passes back the IP address string as the
5291 "host name". However, on others (e.g. Linux), it passes back an empty
5292 string. Exim wasn't checking for this, and was changing the host name to an
5293 empty string, assuming it had been canonicized.
5295 5. Although rare, it is permitted to have more than one PTR record for a given
5296 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5297 all the names associated with an address, because they do in Solaris.
5298 However, it seems that they do not in Linux for data that comes from the
5299 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5300 I found this out when I moved to a new Linux workstation and tried to run
5301 the Exim test suite.
5303 To get round this problem I have changed the code so that it now does its
5304 own call to the DNS to look up PTR records when searching for a host name.
5305 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5306 addresses that are only in /etc/hosts are still found.
5308 This behaviour is, however, controlled by an option called host_lookup_
5309 order, which defaults to "bydns:byaddr". If people want to use the other
5310 order, or indeed, just use one or the other means of lookup, they can
5311 specify it in this variable.
5313 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5314 some operating systems, this comes back from gethostbyaddr() as an empty
5315 string, and this is what Exim used to test for. However, it seems that in
5316 other systems, "." is yielded. Exim now tests for this case too.
5318 7. The values of check_spool_space and check_log_space are now held internally
5319 as a number of kilobytes instead of an absolute number of bytes. If a
5320 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5321 kilobyte. This means that much larger values can be stored.
5323 8. Exim monitor: an attempt to get the action menu when not actually pointing
5324 at a message produces an empty menu entitled "No message selected". This
5325 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5326 no entries in it ("Shell widget menu has zero width and/or height"). So I
5327 have added a single, blank menu entry in this case.
5329 9. Added ${quote_local_part.
5331 10. MIME decoding is now applied to the contents of Subject: header lines when
5334 11. Now that a reference to $sender_host_address automatically causes a reverse
5335 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5336 host lookup before query-style lookups in lists that might use this
5337 variable. This has therefore been abolished, and the "net-" prefix is no
5338 longer necessary for query-style lookups.
5340 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5341 have been a typo for LFLAGS, so it has been changed.
5343 13. The install script calls Exim with "-C /dev/null" in order to find the
5344 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5345 to be output. Howeve, since Exim outputs its version number before the
5346 error, it didn't break the script. It just looked ugly. I fixed this by
5347 always allowing "-C /dev/null" if the caller is root.
5349 14. Ignore overlarge ACL variable number when reading spool file - insurance
5350 against a later release with more variables having written the file.
5352 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5353 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5354 this, as well as the form without the "IPv6" on the front.
5356 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5357 OS/Makefile-Darwin file.
5359 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5360 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5362 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5363 variable. However, some OS use ints for inodes. I've added cast to long int
5364 to get rid of the compiler warning.
5366 19. I had forgotten to lock out "/../" in configuration file names when
5367 ALT_CONFIG_PREFIX was set.
5369 20. Routers used for verification do not need to specify transports. However,
5370 if such a router generated a host list, and callout was configured, Exim
5371 crashed, because it could not find a port number from the (non-existent)
5372 transport. It now assumes port 25 in this circumstance.
5374 21. Added the -t option to exigrep.
5376 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5377 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5378 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5379 them is set, LOOKUP_LSEARCH is forced.
5381 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5383 24. Added sender and host information to the "rejected by local_scan()" log
5384 line; previously there was no indication of these.
5386 25. Added .include_if_exists.
5388 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5389 Linux. It turns out that not all file systems support this. Apparently some
5390 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5391 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5392 not supported on the file descriptor, is now ignored when Exim is trying to
5393 sync a directory. This applies only to Linux.
5395 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5397 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5398 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5401 29. Added support for maildirsize files from supplied patch (modified a bit).
5403 30. The use of :fail: followed by an empty string could lead Exim to respond to
5404 sender verification failures with (e.g.):
5406 550 Verification failed for <xxx>
5407 550 Sender verify failed
5409 where the first response line was missing the '-' that indicates it is not
5410 the final line of the response.
5412 31. The loop for finding the name of the user that called Exim had a hardwired
5413 limit of 10; it now uses the value of finduser_retries, which is used for
5414 all other user lookups.
5416 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5419 33. Exim was neglecting to zero errno before one call of strtol() when
5420 expanding a string and expecting an integer value. On some systems this
5421 resulted in spurious "integer overflow" errors. Also, it was casting the
5422 result into an int without checking.
5424 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5425 did not work. The code looks as if it has *never* worked, though it appears
5426 to have been documented since at least releast 1.62. I have made it work.
5428 35. The "timeout_DNS" error in retry rules, also documented since at least
5429 1.62, also never worked. As it isn't clear exactly what this means, and
5430 clearly it isn't a major issue, I have abolished the feature by treating it
5431 as "timeout", and writing a warning to the main and panic logs.
5433 36. The display of retry rules for -brt wasn't always showing the error code
5436 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5437 timeout_connect_A, timeout_connect_MX.
5439 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5440 to the empty sender.
5442 39. The daemon was not analysing the content of -oX till after it had closed
5443 stderr and disconnected from the controlling terminal. This meant that any
5444 syntax errors were only noted on the panic log, and the return code from
5445 the command was 0. By re-arranging the code a little, I've made the
5446 decoding happen first, so such errors now appear on stderr, and the return
5447 code is 1. However, the actual setting up of the sockets still happens in
5448 the disconnected process, so errors there are still only recorded on the
5451 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5452 connections (as happens on some IP stacks) was logged at start up time as
5453 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5454 it from "IPv6 and IPv4", which means that two separate sockets are being
5457 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5458 says whether AF_INET or AF_INET6 was passed as an argument.
5460 42. Exiwhat output was messed up when time zones were included in log
5463 43. Exiwhat now gives more information about the daemon's listening ports,
5464 and whether -tls-on-connect was used.
5466 44. The "port" option of the smtp transport is now expanded.
5468 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5469 silently ignored. Now an error message is written to the main and panic
5472 46. There's a new ACL modifier called "logwrite" which writes to a log file
5473 as soon as it is encountered.
5475 47. Added $local_user_uid and $local_user_gid at routing time.
5477 48. Exim crashed when trying to verify a sender address that was being
5480 49. Exim was recognizing only a space character after ".include". It now also
5481 recognizes a tab character.
5483 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5484 extracting the relevant information from the specification. The man page no
5485 longer contains scrambled data for the -d option, and I've added a section
5486 at the front about calling Exim under different names.
5488 51. Added "extra_headers" argument to the "mail" command in filter files.
5490 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5493 53. Installed eximstats 1.29.
5495 54. Added transport_filter_timeout as a generic transport option.
5497 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5498 Cc: header lines. This was required by RFC 822, but it not required by RFC
5501 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5502 incoming messages that did not have them. Now it does so only if the
5503 message originates locally, that is, if there is no associated remote host
5504 address. When Resent- header lines are present, this applies to the Resent-
5505 lines rather than the non-Resent- lines.
5507 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5508 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5510 58. Messages for configuration errors now include the name of the main
5511 configuration file - useful now that there may be more than one file in a
5512 list (.included file names were always shown).
5514 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5515 for those rare installations that do not start the daemon as root or run it
5516 setuid root. I've cut out the call to initgroups() if the daemon is not
5519 60. The Exim user and group can now be bound into the binary as text strings
5520 that are looked up at the start of Exim's processing.
5522 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5524 62. Added $mailstore_basename variable.
5526 63. Installed patch to sieve.c from Michael Haardt.
5528 64. When Exim failed to open the panic log after failing to open the main log,
5529 the original message it was trying to log was written to stderr and debug
5530 output, but if they were not available (the usual case in production), it
5531 was lost. Now it is written to syslog before the two lines that record the
5532 failures to open the logs.
5534 65. Users' Exim filters run in subprocesses under the user's uid. It is
5535 possible for a "deliver" command or an alias in a "personal" command to
5536 provoke an address rewrite. If logging of address rewriting is configured,
5537 this fails because the process is not running as root or exim. There may be
5538 a better way of dealing with this, but for the moment (because 4.30 needs
5539 to be released), I have disabled address rewrite logging when running a
5540 filter in a non-root, non-exim process.
5546 1. The buildconfig auxiliary program wasn't quoting the value set for
5547 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5548 not defined. This bug was masked in 4.22 by the effect that was fixed in
5551 2. Some messages that were rejected after a message id was allocated were
5552 shown as "incomplete" by exigrep. It no longer does this for messages that
5553 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5555 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5556 have allow_domain_literals set, the ID did not get logged in the <= line.
5557 Domain literals are now always recognized in Message-ID: header lines.
5559 4. The first argument for a ${extract expansion item is the key name or field
5560 number. Leading and trailing spaces in this item were not being ignored,
5561 causing some misleading effects.
5563 5. When deliver_drop_privilege was set, single queue runner processes started
5564 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5565 same command in the process it spins off) were not dropping privilege.
5567 6. When the daemon running as "exim" started a queue runner, it always
5568 re-executed Exim in the spun-off process. This is a waste of effort when
5569 deliver_drop_privilege is set. The new process now just calls the
5570 queue-runner function directly.
5576 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5579 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5580 ignored. Though the use of -oP was forcing the writing of a pid file, it
5581 was always written to the default place.
5583 3. If the message "no IP address found for host xxxx" is generated during
5584 incoming verification, it is now followed by identification of the incoming
5585 connection (so you can more easily find what provoked it).
5587 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5589 5. Added some features to "harden" Exim a bit more against certain attacks:
5591 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5592 be put in Local/Makefile. This is like the never_users runtime option,
5593 but it cannot be overridden. The default setting is "root".
5595 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5596 prefix string with which any file named in a -C command line option
5599 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5600 is retained for -C and -D only if the caller of Exim is root. Without
5601 it, the exim user may also use -C and -D and retain privilege.
5603 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5604 command line option is disabled.
5606 6. Macro names set by the -D option must start with an upper case letter, just
5607 like macro names defined in the configuration file.
5609 7. Added "dereference=" facility to LDAP.
5611 8. Two instances of the typo "uknown" in the source files are fixed.
5613 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5614 the Configure-Makefile script screwed up while processing it.
5616 10. Incorporated PCRE 4.4.
5618 11. The SMTP synchronization check was not operating right at the start of an
5619 SMTP session. For example, it could not catch a HELO sent before the client
5620 waited for the greeting. There is now a check for outstanding input at the
5621 point when the greeting is written. Because of the duplex, asynchronous
5622 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5623 way, but not yet received, when the check is performed.
5625 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5626 on TCP/IP sockets, because this apparently causes some broken clients to
5629 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5630 unchanged) from the Cygwin maintainer.
5632 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5633 was supported instead of testing for mbx. Effectively a typo.
5635 15. The spa authenticator server code was not checking that the input it
5636 received was valid base64.
5638 16. The debug output line for the "set" modifier in ACLs was not showing the
5639 name of the variable that was being set.
5641 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5643 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5644 lookup on its own. Something else was needed to trigger the lookup. For
5645 example, a match in host_lookup or the need for a host name in a host list.
5646 Now, if $sender_host_name is referenced and the host name has not yet been
5647 looked up, a lookup is performed. If the lookup fails, the variable remains
5648 empty, and $host_lookup_failed is set to "1".
5650 19. Added "eqi" as a case-independent comparison operator.
5652 20. The saslauthd authentication condition could segfault if neither service
5653 nor realm was specified.
5655 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5656 error message that was logged was misleading, and incoming SMTP
5657 connections were dropped. The message is now more accurate, and temporary
5658 errors are given to SMTP connections.
5660 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5661 (except RSET) with a 421 error, until QUIT is received. However, it was
5662 failing to send a response to QUIT.
5664 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5665 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5666 ACL is now run after the helo_try_verify_hosts code.
5668 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5669 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5670 case-independent, so other case variants are also recognized). Apparently
5671 some systems use these upper case variants.
5673 25. If more than two messages were waiting for the same host, and a transport
5674 filter was specified for the transport, Exim sent two messages over the
5675 same TCP/IP connection, and then failed with "socket operation on non-
5676 socket" when it tried to send the third.
5678 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5680 27. The extern definition of crypt16() in expand.c was not being excluded when
5681 the OS had its own crypt16() function.
5683 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5684 as a preferred synonym for return_size_limit, both as an option and as an
5687 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5689 30. Changed the default configuration ACL to relax the local part checking rule
5690 for addresses that are not in any local domains. For these addresses,
5691 slashes and pipe symbols are allowed within local parts, but the sequence
5692 /../ is explicitly forbidden.
5694 31. SPA server authentication was not clearing the challenge buffer before
5697 32. log_message in a "warn" ACL statement was writing to the reject log as
5698 well as to the main log, which contradicts the documentation and doesn't
5699 seem right (because no rejection is happening). So I have stopped it.
5701 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5702 However, I am unable to do any testing of this.
5704 34. Fixed an infelicity in the appendfile transport. When checking directories
5705 for a mailbox, to see if any needed to be created, it was accidentally
5706 using path names with one or more superfluous leading slashes; tracing
5707 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5709 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5710 contents are added to the log line that is written for every discarded
5711 recipient. (Previously a log_message setting was ignored.)
5713 36. The ${quote: operator now quotes the string if it is empty.
5715 37. The install script runs exim in order to find its version number. If for
5716 some reason other than non-existence or emptiness, which it checks, it
5717 could not run './exim', it was installing it with an empty version number,
5718 i.e. as "exim-". This error state is now caught, and the installation is
5721 38. An argument was missing from the function that creates an error message
5722 when Exim fails to connect to the socket for saslauthd authentication.
5723 This could cause Exim to crash, or give a corrupted message.
5725 39. Added isip, isip4, and isip6 to ${if conditions.
5727 40. The ACL variables $acl_xx are now saved with the message, and can be
5728 accessed later in routers, transports, and filters.
5730 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5731 strings in the file are not string-expanded.
5733 42. If a MAIL command specified a SIZE value that was too large to fit into an
5734 int variable, the check against message_size_limit failed. Such values are
5735 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5736 day this will have to be increased, but I don't think I want to be around
5737 when emails are that large.
5744 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5745 iconv() is not standard in FreeBSD.
5747 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5748 IPv6 enabled. The observed symptom was a segmentation fault on return from
5749 the function os_common_find_running_interfaces() in src/os.c.
5751 3. In the check_special_case() function in daemon.c I had used "errno" as an
5752 argument name, which causes warnings on some systems. This was basically a
5753 typo, since it was named "eno" in the comments!
5755 4. The code that waits for the clock to tick (at a resolution of some fraction
5756 of a second) so as to ensure message-id uniqueness was always waiting for
5757 at least one whole tick, when it could have waited for less. [This is
5758 almost certainly not relevant at current processor speeds, where it is
5759 unlikely to ever wait at all. But we try to future-proof.]
5761 5. The function that sleeps for a time interval that includes fractions of a
5762 second contained a race. It did not block SIGALRM between setting the
5763 timer, and suspending (a couple of lines later). If the interval was short
5764 and the sigsuspend() was delayed until after it had expired, the suspension
5765 never ended. On busy systems this could lead to processes getting stuck for
5768 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5769 process, before it forks any delivery processes. The open lookup caching
5770 mechanism meant that the open file or database connection was passed into
5771 the delivery process. The problem was that delivery processes always tidy
5772 up cached lookup data. This could cause a problem for the next delivery
5773 process started by the queue runner, because the external queue runner
5774 process does not know about the closure. So the next delivery process
5775 still has data in the lookup cache. In the case of a file lookup, there was
5776 no problem because closing a file descriptor in a subprocess doesn't affect
5777 the parent. However, if the lookup was caching a connection to a database,
5778 the connection was closed, and the second delivery process was likely to
5779 see errors such as "PGSQL: query failed: server closed the connection
5780 unexpectedly". The problem has been fixed by closing all cached lookups
5781 in a queue runner before running a delivery process.
5783 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5784 seem to have the "const" qualifier which it has on other OS. I've
5787 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5788 *of the same type* (client or server) with the same public name that an
5789 error should be diagnosed.
5791 9. When Exim looked up a host name for an IP address, but failed to find the
5792 original IP address when looking up the host name (a safety check), it
5793 output the message "<ip address> does not match any IP for NULL", which was
5794 confusing, to say the least. The bug was that the host name should have
5795 appeared instead of "NULL".
5797 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5798 user that is built into the binary, and the -C or -D options is used, root
5799 privilege is dropped before the configuration file is read. In addition,
5800 logging is switched to stderr instead of the normal log files. If the
5801 configuration then re-defines the Exim user, the unprivileged environment
5802 is probably not what is expected, so Exim logs a panic warning message (but
5805 However, if deliver_drop_privilege is set, the unprivileged state may well
5806 be exactly what is intended, so the warning has been cut out in that case,
5807 and Exim is allowed to try to write to its normal log files.
5813 1. smtp_return_error_details was not giving details for temporary sender
5814 or receiver verification errors.
5816 2. Diagnose a configuration error if two authenticators have the same public
5819 3. Exim used not to create the message log file for a message until the first
5820 delivery attempt. This could be confusing when incoming messages were held
5821 for policy or load reasons. The message log file is now created at the time
5822 the message is received, and an initial "Received" line is written to it.
5824 4. The automatically generated man page for command line options had a minor
5825 bug that caused no ill effects; however, a more serious problem was that
5826 the procedure for building the man page automatically didn't always
5827 operate. Consequently, release 4.20 contains an out-of-date version. This
5828 shouldn't happen again.
5830 5. When building Exim with embedded Perl support, the script that builds the
5831 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5832 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5834 6. The freeze_tell option was not being used for messages that were frozen on
5835 arrival, either by an ACL or by local_scan().
5837 7. Added the smtp_incomplete_transaction log selector.
5839 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5840 was accepting AUTH without a new EHLO.
5842 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5843 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5846 10. Logging of TCP/IP connections (when configured) now happens in the main
5847 daemon process instead of the child process, so that the TCP/IP connection
5848 count is more accurate (but it can never be perfect).
5850 11. The use of "drop" in a nested ACL was not being handled correctly in the
5851 outer ACL. Now, if condition failure induced by the nested "drop" causes
5852 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5853 or "require"), the connection is dropped.
5855 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5856 that yield "discard" can now be used with an "accept" or a "discard" verb,
5857 but an error is generated for any others (because I can't see a useful way
5858 to define what should happen).
5860 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5861 are now processed in the same way as lines in the Exim configuration file.
5862 In particular, continuation lines are supported.
5864 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5866 15. Added -ti meaning -t -i.
5868 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5869 domains, and warn by logging if others are found.
5871 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5872 returned from GIFCONF when Exim is trying to find the list of interfaces on
5873 a host. The code in os.c has been modified to copy each ifreq to an aligned
5874 structure in all cases.
5876 Also, in some cases, the returned ifreq's were being copied to a 'struct
5877 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5878 means the last couple of bytes of an IPv6 address could be chopped if the
5879 ifreq contained only a normal sockaddr (14 bytes storage).
5881 18. Named domain lists were not supported in the hosts_treat_as_local option.
5882 An entry such as +xxxx was not recognized, and was treated as a literal
5885 19. Ensure that header lines added by a DATA ACL are included in the reject log
5886 if the ACL subsequently rejects the message.
5888 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5889 MD5 (which is deprecated).
5891 21. When testing a filter file using -bf, Exim was writing a message when it
5892 took the sender from a "From " line in the message, but it was not doing so
5893 when it took $return_path from a Return-Path: header line. It now does.
5895 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5896 with a valid header line field name (a series of printing characters
5897 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5899 23. Changed "disc" in the source to "disk" to conform to the documentation and
5900 the book and for uniformity.
5902 24. Ignore Sendmail's -Ooption=value command line item.
5904 25. When execve() failed while trying to run a command in a pipe transport,
5905 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5906 could be confused with a return value of 69 from the command itself. This
5907 has been changed to 127, the value the shell returns if it is asked to run
5908 a non-existent command. The wording for the related log line suggests a
5909 non-existent command as the problem.
5911 26. If received_header_text expands to an empty string, do not add a Received:
5912 header line to the message. (Well, it adds a token one on the spool, but
5913 marks it "old" so that it doesn't get used or transmitted.)
5915 27. Installed eximstats 1.28 (addition of -nt option).
5917 28. There was no check for failure on the call to getsockname() in the daemon
5918 code. This can fail if there is a shortage of resources on the system, with
5919 ENOMEM, for example. A temporary error is now given on failure.
5921 29. Contrary to the C standard, it seems that in some environments, the
5922 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5923 program. Exim now does this explicitly; it affects the formatting of
5924 timestamps using strftime().
5926 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5927 complaints. I've now initialized all the variables, to avoid this.
5929 32. Header lines added by a system filter were not being "seen" during
5930 transport-time rewrites.
5932 33. The info_callback() function passed to OpenSSL is set up with type void
5933 (*)(SSL *, int, int), as described somewhere. However, when calling the
5934 function (actually a macro) that sets it up, the type void(*)() is
5935 expected. I've put in a cast to prevent warnings from picky compilers.
5937 34. If a DNS black list lookup found a CNAME record, but there were no A
5938 records associated with the domain it pointed at, Exim crashed.
5940 35. If a DNS black list lookup returned more than one A record, Exim ignored
5941 all but the first. It now scans all returned addresses if a particular IP
5942 value is being sought. In this situation, the contents of the
5943 $dnslist_value variable are a list of all the addresses, separated by a
5946 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5947 to accept a host name and all its aliases if the forward lookup for any of
5948 them yielded the IP address of the incoming connection. Now it accepts only
5949 those names whose forward lookup yields the correct IP address. Any other
5950 names are discarded. This closes a loophole whereby a rogue DNS
5951 administrator could create reverse DNS records to break through a
5952 wildcarded host restriction in an ACL.
5954 37. If a user filter or a system filter that ran in a subprocess used any of
5955 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5956 the wrong values were passed to the pipe command ($thisaddress had the
5957 value of $0, $0 had the value of $1, etc). This bug was introduced by
5958 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5960 38. Improved the line breaking for long SMTP error messages from ACLs.
5961 Previously, if there was no break point between 40 and 75 characters, Exim
5962 left the rest of the message alone. Two changes have been made: (a) I've
5963 reduced the minimum length to 35 characters; (b) if it can't find a break
5964 point between 35 and 75 characters, it looks ahead and uses the first one
5965 that it finds. This may give the occasional overlong line, but at least the
5966 remaining text gets split now.
5968 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5969 file descriptors might be low, and that setting 1000 would always raise it.
5970 It turns out that in some environments, the limit is already over 1000 and
5971 that lowering it causes trouble. So now Exim takes care not to decrease it.
5973 40. When delivering a message, the value of $return_path is set to $sender_
5974 address at the start of routing (routers may change the value). By an
5975 oversight, this default was not being set up when an address was tested by
5976 -bt or -bv, which affected the outcome if any router or filter referred to
5979 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5980 log only when "message" or "log_message" are set. However, if one of the
5981 conditions was an address verification, or a call to a nested ACL, the
5982 messages generated by the underlying test were being passed through. This
5983 no longer happens. The underlying message is available in $acl_verify_
5984 message for both "message" and "log_message" expansions, so it can be
5985 passed through if needed.
5987 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5988 new expansion $bh_ to give the encoded byte string without charset
5989 translation. Translation happens only if iconv() is available; HAVE_ICONV
5990 indicates this at build time. HEADERS_CHARSET gives the charset to
5991 translate to; headers_charset can change it in the configuration, and
5992 "headers charset" can change it in an individual filter file.
5994 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5995 that creates RFC 2047 encoded "words" labels them as that charset instead
5996 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5997 expansion operator; (ii) when Exim creates a From: line for a local
5998 message; (iii) when a header line is rewritten to include a "phrase" part.
6000 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6001 buggy, causing it to skip the first lines of messages whose message ID
6002 ended in 'D'. This would not have bitten before Exim release 4.14, because
6003 message IDs were unlikely to end in 'D' before then. The effect was to have
6004 incorrect size information for certain domains.
6006 45. #include "config.h" was missing at the start of the crypt16.c module. This
6007 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6010 46. If there was a timeout during a "random" callout check, Exim treated it as
6011 a failure of the random address, and carried on sending RSET and the real
6012 address. If the delay was just some slowness somewhere, the response to the
6013 original RCPT would be taken as a response to RSET and so on, causing
6014 mayhem of various kinds.
6016 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6017 when I implemented it. It didn't allow for the fact that some option values
6018 may legitimatetly be negative (e.g. size_addition), and it didn't even do
6019 the right test for positive values.
6021 48. Domain names in DNS records are case-independent. Exim always looks them up
6022 in lower case. Some resolvers return domain names in exactly the case they
6023 appear in the zone file, that is, they may contain uppercase letters. Not
6024 all resolvers do this - some return always lower case. Exim was treating a
6025 change of case by a resolver as a change of domain, similar to a widening
6026 of a domain abbreviation. This triggered its re-routing code and so it was
6027 trying to route what was effectively the same domain again. This normally
6028 caused routing to fail (because the router wouldn't handle the domain
6029 twice). Now Exim checks for this case specially, and just changes the
6030 casing of the domain that it ultimately uses when it transmits the message
6033 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6036 50. If a filter generated a file delivery with a non-absolute name (possible if
6037 no home directory exists for the router), the forbid_file option was not
6040 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6041 the existing equality matching.
6043 52. Exim was using ints instead of ino_t variables in some places where it was
6044 dealing with inode numbers.
6046 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6047 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6048 called TMPDIR, and if it finds it is different, it changes its value.
6050 54. The smtp_printf() function is now made available to local_scan() so
6051 additional output lines can be written before returning. There is also an
6052 smtp_fflush() function to enable the detection of a dropped connection.
6053 The variables smtp_input and smtp_batched_input are exported to
6056 55. Changed the default runtime configuration: the message "Unknown user"
6057 has been removed from the ACL, and instead placed on the localuser router,
6058 using the cannot_route_message feature. This means that any verification
6059 failures that generate their own messages won't get overridden. Similarly,
6060 the "Unrouteable address" message that was in the ACL for unverifiable
6061 relay addresses has also been removed.
6063 56. Added hosts_avoid_esmtp to the smtp transport.
6065 57. The exicyclog script was not checking for the esoteric option
6066 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6067 will work only if exicyclog is run under the appropriate euid.
6069 58. Following a discussion on the list, the rules by which Exim recognises line
6070 endings on incoming messages have been changed. The -dropcr and drop_cr
6071 options are now no-ops, retained only for backwards compatibility. The
6072 following line terminators are recognized: LF CRLF CR. However, special
6073 processing applies to CR:
6075 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6076 nor a local message in the state where . is a terminator.
6078 (ii) If a bare CR is encountered in a header line, an extra space is added
6079 after the line terminator so as not to end the header. The reasoning
6080 behind this is that bare CRs in header lines are most likely either
6081 to be mistakes, or people trying to play silly games.
6083 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6084 was being incorrectly given as 18 bytes larger than it should have been.
6085 This is a VOB (very old bug).
6087 60. This may never have affected anything current, but just in case it has:
6088 When the local host is found other than at the start of a list of hosts,
6089 the local host, those with the same MX, and any that follow, are discarded.
6090 When the list in question was part of a longer list of hosts, the following
6091 hosts (not currently being processed) were also being discarded. This no
6092 longer happens. I'm not sure if this situation could ever has previously
6095 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6098 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6099 header. This is something that is recommended in a new Internet Draft, and
6100 is something that is documented as being done by Sendmail. There are two
6101 possible values. For messages generated by the autoreply transport, Exim
6104 Auto-Submitted: auto-replied
6106 whereas for all other generated messages (e.g. bounces) it adds
6108 Auto-Submitted: auto-generated
6110 63. The "personal" condition in filters now includes a test for the
6111 Auto-Submitted: header. If it contains the string "auto-" the message it
6112 not considered personal.
6114 64. Added rcpt_include_affixes as a generic transport option.
6116 65. Added queue_only_override (default true).
6118 66. Added the syslog_duplication option.
6120 67. If what should have been the first header line of a message consisted of
6121 a space followed by a colon, Exim was mis-interpreting it as a header line.
6122 It isn't of course - it is syntactically invalid and should therefore be
6123 treated as the start of the message body. The misbehaviour could have
6124 caused a number of strange effects, including loss of data in subsequent
6125 header lines, and spool format errors.
6127 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6128 client host had authenticated. This control can now be exercised by an ACL
6129 for more flexibility.
6131 69. By default, callouts do not happen when testing with -bh. There is now a
6132 variant, -bhc, which does actually run the callout code, including
6133 consulting and updating the callout cache.
6135 70. Added support for saslauthd authentication, courtesy of Alexander
6138 71. If statvfs() failed on the spool or log directories while checking their
6139 size for availability, Exim confusingly gave the error "space shortage".
6140 Furthermore, in debugging mode it crashed with a floating point exception.
6141 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6142 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6143 serious problem, Exim now writes to the main and panic logs when this
6144 happens, with details of the failure. It then refuses to accept the
6145 incoming message, giving the message "spool directory problem" or "log
6146 directory problem" with a 421 code for SMTP messages.
6148 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6149 0, 1, and 2 exist, because some OS complain for execs without them (see
6150 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6151 descriptors. However, the code omitted to check that the open succeeded,
6152 causing mysterious errors if for some reason the permissions on /dev/null
6153 got screwed. Now Exim writes a message to the main and panic logs, and
6154 bombs out if it can't open /dev/null.
6156 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6157 interact so that it is all more flexible. It is supposed to remain
6158 backwards compatible. Also added extra_local_interfaces.
6160 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6161 to bomb out with an assertion failure - to the client this appears as a
6162 connection drop. This problem occurs in the part of the code that was taken
6163 from the Samba project. Fortunately, the assertion is in a very simple
6164 function, so I have fixed this by reproducing the function inline in the
6165 one place where it is called, and arranging for authentication to fail
6166 instead of killing the process with assert().
6168 75. The SPA client code was not working when the server requested OEM rather
6169 than Unicode encoding.
6171 76. Added code to make require_files with a specific uid setting more usable in
6172 the case where statting the file as root fails - usually a non-root-mounted
6173 NFS file system. When this happens and the failure is EACCES, Exim now
6174 forks a subprocess and does the per-uid checking as the relevant uid.
6176 77. Added process_log_path.
6178 78. If log_file_path was not explicitly set, a setting of check_log_space or
6179 check_log_inodes was ignored.
6181 79. If a space check for the spool or log partitions fails, the incident is now
6182 logged. Of course, in the latter case the data may get lost...
6184 80. Added the %p formatting code to string_format() so that it can be used to
6185 print addresses in debug_print(). Adjusted all the address printing in the
6186 debugging in store.c to use %p rather than %d.
6188 81. There was a concern that a line of code in smtp_in.c could overflow a
6189 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6190 initially expressed, the concern was not well-founded, because trailing
6191 spaces are removed early. However, if the trailing spaces were followed by
6192 a NULL, they did not get removed, so the overflow was possible. Two fixes
6195 (a) I re-wrote the offending code in a cleaner fashion.
6196 (b) If an incoming SMTP command contains a NULL character, it is rejected
6199 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6200 runs initgroups(), so that if the Exim user is in any additional groups,
6201 they will be used during message reception.
6207 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob