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
18 TL/01 When running the test suite, the README says that variables such as
19 no_msglog_check are global and can be placed anywhere in a specific
20 test's script, however it was observed that placement needed to be near
21 the beginning for it to behave that way. Changed the runtest perl
22 script to read through the entire script once to detect and set these
23 variables, reset to the beginning of the script, and then run through
24 the script parsing/test process like normal.
26 TL/02 The BSD's have an arc4random API. One of the functions to induce
27 adding randomness was arc4random_stir(), but it has been removed in
28 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
29 function when detected.
31 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
32 cause callback expansion.
34 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
35 syntax errors in an expansion can be treated as a string instead of
36 logging or causing an error, due to the internal use of bool_lax
37 instead of bool when processing it.
39 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
40 server certificates when making smtp deliveries.
42 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
44 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
46 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
48 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
49 Merged patch from Sebastian Wiedenroth.
51 JH/05 Fix results-pipe from transport process. Several recipients, combined
52 with certificate use, exposed issues where response data items split
53 over buffer boundaries were not parsed properly. This eventually
54 resulted in duplicates being sent. This issue only became common enough
55 to notice due to the introduction of conection certificate information,
56 the item size being so much larger. Found and fixed by Wolfgang Breyha.
58 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
59 size buffer was used, resulting in syntax errors when an expansion
62 JH/07 Add support for directories of certificates when compiled with a GnuTLS
63 version 3.3.6 or later.
65 JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef
66 is EXPERIMENTAL_EVENT, the main-configuration and transport options
67 both become "event_action", the variables become $event_name, $event_data
68 and $event_defer_errno. There is a new variable $verify_mode, usable in
69 routers, transports and related events. The tls:cert event is now also
70 raised for inbound connections, if the main configuration event_action
73 TL/06 In test suite, disable OCSP for old versions of openssl which contained
74 early OCSP support, but no stapling (appears to be less than 1.0.0).
76 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
77 server certificate names available under the smtp transport option
78 "tls_verify_cert_hostname" now do not permit multi-component wildcard
81 JH/10 Time-related extraction expansions from certificates now use the main
82 option "timezone" setting for output formatting, and are consistent
83 between OpenSSL and GnuTLS compilations. Bug 1541.
85 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
86 encoded parameter in the incoming message. Bug 1558.
88 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
89 include certificate info, eximon was claiming there were spoolfile
92 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
94 JH/14 Log delivery-related information more consistently, using the sequence
95 "H=<name> [<ip>]" wherever possible.
97 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
98 are problematic for Debian distribution, omit them from the release
101 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
103 JH/16 Fix string representation of time values on 64bit time_t anchitectures.
106 JH/17 Fix a null-indirection in certextract expansions when a nondefault
107 output list separator was used.
112 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
113 checkers that were complaining about end of non-void function with no
116 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
117 This was a regression intruduced in 4.83 by another bugfix.
119 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
121 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
122 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
128 TF/01 Correctly close the server side of TLS when forking for delivery.
130 When a message was received over SMTP with TLS, Exim failed to clear up
131 the incoming connection properly after forking off the child process to
132 deliver the message. In some situations the subsequent outgoing
133 delivery connection happened to have the same fd number as the incoming
134 connection previously had. Exim would try to use TLS and fail, logging
135 a "Bad file descriptor" error.
137 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
138 utilities have not been installed.
140 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
141 temporary space as the ACL may create new global variables.
143 TL/01 LDAP support uses per connection or global context settings, depending
144 upon the detected version of the libraries at build time.
146 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
147 to extract and use the src ip:port in logging and expansions as if it
148 were a direct connection from the outside internet. PPv2 support was
149 updated based on HAProxy spec change in May 2014.
151 JH/02 Add ${listextract {number}{list}{success}{fail}}.
153 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
154 Properly escape header and check for NULL return.
156 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
159 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
161 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
162 characters in header names, implemented as a verify condition.
163 Contributed by Michael Fischer v. Mollard.
165 TL/05 Rename SPF condition results err_perm and err_temp to standardized
166 results permerror and temperror. Previous values are deprecated but
167 still accepted. In a future release, err_perm and err_temp will be
168 completely removed, which will be a backward incompatibility if the
169 ACL tests for either of these two old results. Patch contributed by
170 user bes-internal on the mailing list.
172 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
174 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
175 selectors, in both main and reject logs.
177 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
180 JH/07 Add malware type "sock" for talking to simple daemon.
182 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
184 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
185 routers/transports under cutthrough routing.
187 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
188 numbers. Touch up "bool" conditional to keep the same definition.
190 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
192 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
194 JH/12 Expand items in router/transport headers_add or headers_remove lists
195 individually rather than the list as a whole. Bug 1452.
197 Required for reasonable handling of multiple headers_ options when
198 they may be empty; requires that headers_remove items with embedded
199 colons must have them doubled (or the list-separator changed).
201 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
202 view the policy declared in the DMARC record. Currently, $dmarc_status
203 is a combined value of both the record presence and the result of the
206 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
208 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
209 dnslookup router and the smtp transport (applying to the forward
212 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
213 of ldap servers used for a specific lookup. Patch provided by Heiko
216 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
217 New variable $lookup_dnssec_authenticated for observability.
219 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
220 Patch submitted by Lars Timman.
222 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
224 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
225 Requires trusted mode and valid format message id, aborts otherwise.
226 Patch contributed by Heiko Schlichting.
228 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
229 certextract with support for various fields. Bug 1358.
231 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
232 is requested by default, modifiable by smtp transport option
235 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
236 operate on certificate variables to give certificate fingerprints
237 Also new ${sha256:cert_variable}.
239 JH/23 The PRDR feature is moved from being Experimental into the mainline.
241 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
242 Christian Aistleitner.
244 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
246 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
247 file. Patch from Wolfgang Breyha.
249 JH/25 Expand the coverage of the delivery $host and $host_address to
250 client authenticators run in verify callout. Bug 1476.
252 JH/26 Port service names are now accepted for tls_on_connect_ports, to
253 align with daemon_smtp_ports. Bug 72.
255 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
256 support and error reporting did not work properly.
258 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
259 and is readable. Patch from Andrew Colin Kissa.
261 TL/14 Enhance documentation of ${run expansion and how it parses the
262 commandline after expansion, particularly in the case when an
263 unquoted variable expansion results in an empty value.
265 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
267 PP/02 Fix internal collision of T_APL on systems which support RFC3123
268 by renaming away from it. Addresses GH issue 15, reported by
271 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
273 TL/15 SECURITY: prevent double expansion in math comparison functions
274 (can expand unsanitized data). Not remotely exploitable.
281 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
283 PP/02 Make -n do something, by making it not do something.
284 When combined with -bP, the name of an option is not output.
286 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
289 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
290 $sender_host_name and config options to manage this, and basic check
293 PP/05 DSCP support for outbound connections and control modifier for inbound.
295 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
296 (Only plugin which currently uses this is kerberos4, which nobody should
297 be using, but we should make it available and other future plugins might
298 conceivably use it, even though it would break NAT; stuff *should* be
299 using channel bindings instead).
301 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
302 name; added for Sendmail compatibility; requires admin caller.
303 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
304 just ignore it); requires trusted caller.
305 Also parse but ignore: -Ac -Am -X<logfile>
308 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
310 TL/02 Add +smtp_confirmation as a default logging option.
312 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
313 Patch by Magnus Holmgren from 2007-02-20.
315 TL/04 Bugzilla 1281 - Spec typo.
316 Bugzilla 1283 - Spec typo.
317 Bugzilla 1290 - Spec grammar fixes.
319 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
321 TL/06 Add Experimental DMARC support using libopendmarc libraries.
323 TL/07 Fix an out of order global option causing a segfault. Reported to dev
324 mailing list by by Dmitry Isaikin.
326 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
328 JH/02 Support "G" suffix to numbers in ${if comparisons.
330 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
332 NM/01 Bugzilla 1197 - Spec typo
333 Bugzilla 1196 - Spec examples corrections
335 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
337 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
338 gnutls_enable_pkcs11, but renamed to more accurately indicate its
341 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
342 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
344 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
345 "acl {{name}{arg}...}", and optional args on acl condition
348 JH/05 Permit multiple router/transport headers_add/remove lines.
350 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
352 JH/07 Avoid using a waiting database for a single-message-only transport.
353 Performance patch from Paul Fisher. Bugzilla 1262.
355 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
358 JH/09 Add $headers_added variable, with content from use of ACL modifier
359 add_header (but not yet added to the message). Bugzilla 199.
361 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
362 Pulled from Bugzilla 817 by Wolfgang Breyha.
364 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
366 (nb: this is the same fix as in Exim 4.80.1)
368 JH/11 Add A= logging on delivery lines, and a client_set_id option on
371 JH/12 Add optional authenticated_sender logging to A= and a log_selector
374 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
376 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
377 advertise SMTP AUTH mechanism to us, instead of a generic
378 protocol violation error. Also, make Exim more robust to bad
379 data from the Dovecot auth socket.
381 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
383 When a queue runner is handling a message, Exim first routes the
384 recipient addresses, during which it prunes them based on the retry
385 hints database. After that it attempts to deliver the message to
386 any remaining recipients. It then updates the hints database using
389 So if a recipient address works intermittently, it can get repeatedly
390 deferred at routing time. The retry hints record remains fresh so the
391 address never reaches the final cutoff time.
393 This is a fairly common occurrence when a user is bumping up against
394 their storage quota. Exim had some logic in its local delivery code
395 to deal with this. However it did not apply to per-recipient defers
396 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
398 This change adds a proper retry rule check during routing so that the
399 final cutoff time is checked against the message's age. We only do
400 this check if there is an address retry record and there is not a
401 domain retry record; this implies that previous attempts to handle
402 the address had the retry_use_local_parts option turned on. We use
403 this as an approximation for the destination being like a local
404 delivery, as in LMTP.
406 I suspect this new check makes the old local delivery cutoff check
407 redundant, but I have not verified this so I left the code in place.
409 TF/02 Correct gecos expansion when From: is a prefix of the username.
411 Test 0254 submits a message to Exim with the header
415 When I ran the test suite under the user fanf2, Exim expanded
416 the header to contain my full name, whereas it should have added
417 a Resent-Sender: header. It erroneously treats any prefix of the
418 username as equal to the username.
420 This change corrects that bug.
422 GF/01 DCC debug and logging tidyup
423 Error conditions log to paniclog rather than rejectlog.
424 Debug lines prefixed by "DCC: " to remove any ambiguity.
426 TF/03 Avoid unnecessary rebuilds of lookup-related code.
428 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
429 Bug spotted by Jeremy Harris; was flawed since initial commit.
430 Would have resulted in OCSP responses post-SNI triggering an Exim
431 NULL dereference and crash.
433 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
435 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
436 Bug detection, analysis and fix by Samuel Thibault.
437 Bugzilla 1331, Debian bug #698092.
439 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
441 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
442 Server implementation by Todd Lyons, client by JH.
443 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
444 config variable "prdr_enable" controls whether the server
445 advertises the facility. If the client requests PRDR a new
446 acl_data_smtp_prdr ACL is called once for each recipient, after
447 the body content is received and before the acl_smtp_data ACL.
448 The client is controlled by bolth of: a hosts_try_prdr option
449 on the smtp transport, and the server advertisement.
450 Default client logging of deliveries and rejections involving
451 PRDR are flagged with the string "PRDR".
453 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
454 fclose(). Diagnosis by Todd Lyons.
456 PP/17 Update configure.default to handle IPv6 localhost better.
457 Patch by Alain Williams (plus minor tweaks).
460 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
461 This is now consistent with GnuTLS, and is now documented: the
462 previous undocumented portable approach to treating the option as
463 unset was to force an expansion failure. That still works, and
464 an empty string is now equivalent.
466 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
467 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
468 not performing validation itself.
470 PP/20 Added force_command boolean option to pipe transport.
471 Patch from Nick Koston, of cPanel Inc.
473 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
476 TF/04 Added udpsend ACL modifer and hexquote expansion operator
478 PP/21 Fix eximon continuous updating with timestamped log-files.
479 Broken in a format-string cleanup in 4.80, missed when I repaired the
480 other false fix of the same issue.
481 Report and fix from Heiko Schlichting.
484 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
485 Report from Prashanth Katuri.
487 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
488 It's SecureTransport, so affects any MacOS clients which use the
489 system-integrated TLS libraries, including email clients.
491 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
492 using a MIME ACL for non-SMTP local injection.
493 Report and assistance in diagnosis by Warren Baker.
495 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
497 JH/16 Fix comparisons for 64b. Bugzilla 1385.
499 TL/09 Add expansion variable $authenticated_fail_id to keep track of
500 last id that failed so it may be referenced in subsequent ACL's.
502 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
505 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
506 ldap library initialization, allowing self-signed CA's to be
507 used. Also properly sets require_cert option later in code by
508 using NULL (global ldap config) instead of ldap handle (per
509 session). Bug diagnosis and testing by alxgomz.
511 TL/12 Enhanced documentation in the ratelimit.pl script provided in
512 the src/util/ subdirectory.
514 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
515 renamed to Transport Post Delivery Action by Jeremy Harris, as
518 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
519 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
520 redis_servers = needs to be configured which will be used by the redis
521 lookup. Patch from Warren Baker, of The Packet Hub.
523 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
525 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
526 hostname or reverse DNS when processing a host list. Used suggestions
527 from multiple comments on this bug.
529 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
531 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
532 Missed a few lines, added it to make the runtest require no keyboard
535 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
536 contains upper case chars. Make router use caseful_local_part.
538 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
539 support when GnuTLS has been built with p11-kit.
545 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
547 This, or similar/improved, will also be change PP/11 of 4.82.
553 PP/01 Handle short writes when writing local log-files.
554 In practice, only affects FreeBSD (8 onwards).
555 Bugzilla 1053, with thanks to Dmitry Isaikin.
557 NM/01 Bugzilla 949 - Documentation tweak
559 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
562 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
564 PP/02 Implemented gsasl authenticator.
566 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
568 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
569 `pkg-config foo` for cflags/libs.
571 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
572 with rest of GSASL and with heimdal_gssapi.
574 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
575 `pkg-config foo` for cflags/libs for the TLS implementation.
577 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
578 properties get this fed in as external SSF. A number of robustness
579 and debugging improvements to the cyrus_sasl authenticator.
581 PP/08 cyrus_sasl server now expands the server_realm option.
583 PP/09 Bugzilla 1214 - Log authentication information in reject log.
584 Patch by Jeremy Harris.
586 PP/10 Added dbmjz lookup type.
588 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
590 PP/12 MAIL args handles TAB as well as SP, for better interop with
591 non-compliant senders.
592 Analysis and variant patch by Todd Lyons.
594 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
595 Bug report from Lars Müller <lars@samba.org> (via SUSE),
596 Patch from Dirk Mueller <dmueller@suse.com>
598 PP/13 tls_peerdn now print-escaped for spool files.
599 Observed some $tls_peerdn in wild which contained \n, which resulted
600 in spool file corruption.
602 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
603 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
604 or write after TLS renegotiation, which otherwise led to messages
607 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
608 as a tracking header (ie: a signed header comes before the signature).
609 Patch from Wolfgang Breyha.
611 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
612 comma-sep list; embedded commas doubled.
614 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
616 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
618 Report and patch from Dmitry Banschikov.
620 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
621 Removed SSL_clear() after SSL_new() which led to protocol negotiation
622 failures. We appear to now support TLS1.1+ with Exim.
624 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
625 lets Exim select keys and certificates based upon TLS SNI from client.
626 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
627 before an outbound SMTP session. New log_selector, +tls_sni.
629 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
630 NULL dereference. Report and patch from Alun Jones.
632 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
633 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
634 Not seeing resolver debug output on NetBSD, but suspect this is a
635 resolver implementation change.
637 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
638 Left warnings. Added "eximon gdb" invocation mode.
640 PP/21 Defaulting "accept_8bitmime" to true, not false.
642 PP/22 Added -bw for inetd wait mode support.
644 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
645 locate the relevant includes and libraries. Made this the default.
647 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
648 Bugzilla 1246, report and most of solution from Tomasz Kusy.
650 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
651 This may cause build issues on older platforms.
653 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
654 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
655 gnutls_require_mac & gnutls_require_protocols (no longer supported).
656 Added SNI support via GnuTLS too.
657 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
659 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
661 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
662 Applied second patch from Janne, implementing suggestion to default
663 multiple-strings-in-record handling to match SPF spec.
665 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
667 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
668 read-only, out of scope).
669 Patch from Wolfgang Breyha, report from Stuart Northfield.
671 PP/29 Fix three issues highlighted by clang analyser static analysis.
672 Only crash-plausible issue would require the Cambridge-specific
673 iplookup router and a misconfiguration.
674 Report from Marcin Mirosław.
676 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
678 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
679 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
680 As part of this, removing so much warning spew let me fix some minor
681 real issues in debug logging.
683 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
684 assignment on my part. Fixed.
686 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
687 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
688 Janne Snabb (who went above and beyond: thank you).
690 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
691 string otherwise requires a connection and a bunch more work and it's
692 relatively easy to get wrong. Should also expose TLS library linkage
695 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
696 64-bit ${eval} (JH/03).
698 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
699 GNU libc to support some of the 64-bit stuff, should not lead to
700 conflicts. Defined before os.h is pulled in, so if a given platform
701 needs to override this, it can.
703 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
704 protection layer was required, which is not implemented.
705 Bugzilla 1254, patch from Wolfgang Breyha.
707 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
708 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
709 tls_dhparam take prime identifiers. Also unbreak combination of
710 OpenSSL+DH_params+TLSSNI.
712 PP/39 Disable SSLv2 by default in OpenSSL support.
718 PP/01 Solaris build fix for Oracle's LDAP libraries.
719 Bugzilla 1109, patch from Stephen Usher.
721 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
723 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
726 TF/02 Fix a couple more cases where we did not log the error message
727 when unlink() failed. See also change 4.74-TF/03.
729 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
730 lock up or crash if it happened to be inside a call to libc when it
731 got a SIGUSR1 from exiwhat.
733 The SIGUSR1 handler appends the current process status to the process
734 log which is later printed by exiwhat. It used to use the general
735 purpose logging code to do this, but several functions it calls are
736 not safe for signals.
738 The new output code in the SIGUSR1 handler is specific to the process
739 log, and simple enough that it's easy to inspect for signal safety.
740 Removing some special cases also simplifies the general logging code.
741 Removing the spurious timestamps from the process log simplifies
744 TF/04 Improved ratelimit ACL condition.
746 The /noupdate option has been deprecated in favour of /readonly which
747 has clearer semantics. The /leaky, /strict, and /readonly update modes
748 are mutually exclusive. The update mode is no longer included in the
749 database key; it just determines when the database is updated. (This
750 means that when you upgrde Exim will forget old rate measurements.)
752 Exim now checks that the per_* options are used with an update mode that
753 makes sense for the current ACL. For example, when Exim is processing a
754 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
755 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
756 must specify per_mail/readonly. If you omit the update mode it defaults to
757 /leaky where that makes sense (as before) or /readonly where required.
759 The /noupdate option is now undocumented but still supported for
760 backwards compatibility. It is equivalent to /readonly except that in
761 ACLs where /readonly is required you may specify /leaky/noupdate or
762 /strict/noupdate which are treated the same as /readonly.
764 A useful new feature is the /count= option. This is a generalization
765 of the per_byte option, so that you can measure the throughput of other
766 aggregate values. For example, the per_byte option is now equivalent
767 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
769 The per_rcpt option has been generalized using the /count= mechanism
770 (though it's more complicated than the per_byte equivalence). When it is
771 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
772 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
773 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
774 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
775 Note that using per_rcpt with a non-readonly update mode in more than
776 one ACL will cause the recipients to be double-counted. (The per_mail
777 and per_byte options don't have this problem.)
779 The handling of very low rates has changed slightly. If the computed rate
780 is less than the event's count (usually one) then this event is the first
781 after a long gap. In this case the rate is set to the same as this event's
782 count, so that the first message of a spam run is counted properly.
784 The major new feature is a mechanism for counting the rate of unique
785 events. The new per_addr option counts the number of different
786 recipients that someone has sent messages to in the last time period. It
787 behaves like per_rcpt if all the recipient addresses are different, but
788 duplicate recipient addresses do not increase the measured rate. Like
789 the /count= option this is a general mechanism, so the per_addr option
790 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
791 example, measure the rate that a client uses different sender addresses
792 with the options per_mail/unique=$sender_address. There are further
793 details in the main documentation.
795 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
797 TF/06 Removed a few PCRE remnants.
799 TF/07 Automatically extract Exim's version number from tags in the git
800 repository when doing development or release builds.
802 PP/02 Raise smtp_cmd_buffer_size to 16kB.
803 Bugzilla 879. Patch from Paul Fisher.
805 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
806 Heavily based on revision 40f9a89a from Simon Arlott's tree.
809 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
811 PP/05 Variable $av_failed, true if the AV scanner deferred.
812 Bugzilla 1078. Patch from John Horne.
814 PP/06 Stop make process more reliably on build failure.
815 Bugzilla 1087. Patch from Heiko Schlittermann.
817 PP/07 Make maildir_use_size_file an _expandable_ boolean.
818 Bugzilla 1089. Patch from Heiko Schlittermann.
820 PP/08 Handle ${run} returning more data than OS pipe buffer size.
821 Bugzilla 1131. Patch from Holger Weiß.
823 PP/09 Handle IPv6 addresses with SPF.
824 Bugzilla 860. Patch from Wolfgang Breyha.
826 PP/10 GnuTLS: support TLS 1.2 & 1.1.
828 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
831 PP/11 match_* no longer expand right-hand-side by default.
832 New compile-time build option, EXPAND_LISTMATCH_RHS.
833 New expansion conditions, "inlist", "inlisti".
835 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
837 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
839 PP/14 fix log_write() format string regression from TF/03.
840 Bugzilla 1152. Patch from Dmitry Isaikin.
846 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
848 PP/02 Harmonised TLS library version reporting; only show if debugging.
849 Layout now matches that introduced for other libraries in 4.74 PP/03.
851 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
853 PP/04 New "dns_use_edns0" global option.
855 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
858 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
859 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
861 TK/01 Updated PolarSSL code to 0.14.2.
862 Bugzilla 1097. Patch from Andreas Metzler.
864 PP/07 Catch divide-by-zero in ${eval:...}.
867 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
870 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
871 format-string attack -- SECURITY: remote arbitrary code execution.
873 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
874 time unintentionally subject to list matching rules, letting the header
875 cause arbitrary Exim lookups (of items which can occur in lists, *not*
876 arbitrary string expansion). This allowed for information disclosure.
878 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
879 INT_MIN/-1 -- value coerced to INT_MAX.
885 NM/01 Workround for PCRE version dependency in version reporting
888 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
889 This fixes portability to compilers other than gcc, notably
890 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
892 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
893 makefiles for portability to HP-UX and POSIX correctness.
895 PP/01 Permit LOOKUP_foo enabling on the make command-line.
896 Also via indented variable definition in the Makefile.
897 (Debugging by Oliver Heesakkers).
899 PP/02 Restore caching of spamd results with expanded spamd_address.
900 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
902 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
903 Improves build reliability. Fix from: Frank Elsner
905 NM/02 Fix wide character breakage in the rfc2047 coding
906 Fixes bug 1064. Patch from Andrey N. Oktyabrski
908 NM/03 Allow underscore in dnslist lookups
909 Fixes bug 1026. Patch from Graeme Fowler
911 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
912 Code patches from Adam Ciarcinski of NetBSD.
914 NM/04 Fixed exiqgrep to cope with mailq missing size issue
917 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
918 is logged, to avoid truncation. Patch from John Horne.
920 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
921 Patch from Jakob Hirsch.
923 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
924 SQL string expansion failure details.
925 Patch from Andrey Oktyabrski.
927 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
928 Patch from Simon Arlott.
930 PP/09 New lookups functionality failed to compile on old gcc which rejects
931 extern declarations in function scope.
932 Patch from Oliver Fleischmann
934 PP/10 Use sig_atomic_t for flags set from signal handlers.
935 Check getgroups() return and improve debugging.
936 Fixed developed for diagnosis in bug 927 (which turned out to be
939 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
940 Patch from Mark Zealey.
942 PP/12 Bugzilla 1056: Improved spamd server selection.
943 Patch from Mark Zealey.
945 PP/13 Bugzilla 1086: Deal with maildir quota file races.
946 Based on patch from Heiko Schlittermann.
948 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
949 Patch from Uwe Doering, sign-off by Michael Haardt.
951 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
952 variable declaration deep within a block. Bug and patch from
955 PP/15 lookups-Makefile IRIX compatibilty coercion.
957 PP/16 Make DISABLE_DKIM build knob functional.
959 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
960 Patch by Simon Arlott
962 TF/03 Fix valgrind.h portability to C89 compilers that do not support
963 variable argument macros. Our copy now differs from upstream.
969 TF/01 Failure to get a lock on a hints database can have serious
970 consequences so log it to the panic log.
972 TF/02 Log LMTP confirmation messages in the same way as SMTP,
973 controlled using the smtp_confirmation log selector.
975 TF/03 Include the error message when we fail to unlink a spool file.
977 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
978 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
979 for maintaining out-of-tree patches for some time.
981 PP/01 Bugzilla 139: Documentation and portability issues.
982 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
983 Handle per-OS dynamic-module compilation flags.
985 PP/02 Let /dev/null have normal permissions.
986 The 4.73 fixes were a little too stringent and complained about the
987 permissions on /dev/null. Exempt it from some checks.
988 Reported by Andreas M. Kirchwitz.
990 PP/03 Report version information for many libraries, including
991 Exim version information for dynamically loaded libraries. Created
992 version.h, now support a version extension string for distributors
993 who patch heavily. Dynamic module ABI change.
995 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
996 privilege escalation vulnerability whereby the Exim run-time user
997 can cause root to append content of the attacker's choosing to
1000 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1003 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1004 If dropping privileges for untrusted macros, we disabled normal logging
1005 on the basis that it would fail; for the Exim run-time user, this is not
1006 the case, and it resulted in successful deliveries going unlogged.
1007 Fixed. Reported by Andreas Metzler.
1013 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1014 only prepend for the Resent-* case. Fixes regression introduced in
1015 Exim 4.70 by NM/22 for Bugzilla 607.
1017 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1018 increasing numbers of administrators be bitten by this.
1020 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1022 PP/03 Bugzilla 994: added openssl_options main configuration option.
1024 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1026 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1028 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1030 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1031 without a peer certificate, leading to a segfault because of an
1032 assumption that peers always have certificates. Be a little more
1033 paranoid. Problem reported by Martin Tscholak.
1035 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1036 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1037 NB: ClamAV planning to remove STREAM in "middle of 2010".
1038 CL also introduces -bmalware, various -d+acl logging additions and
1039 more caution in buffer sizes.
1041 PP/09 Implemented reverse_ip expansion operator.
1043 PP/10 Bugzilla 937: provide a "debug" ACL control.
1045 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1047 PP/12 Bugzilla 973: Implement --version.
1049 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1051 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1053 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1055 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1056 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1057 ignore trailing whitespace.
1059 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1061 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1064 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1065 Notification from Dr Andrew Aitchison.
1067 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1068 ExtendedDetectionInfo response format.
1069 Notification from John Horne.
1071 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1074 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1075 XSL and documented dependency on system catalogs, with examples of how
1078 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1081 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1082 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1083 configuration file which is writeable by the Exim user or group.
1085 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1086 of configuration files to cover files specified with the -C option if
1087 they are going to be used with root privileges, not just the default
1090 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1091 option (effectively making it always true).
1093 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1094 files to be used while preserving root privileges.
1096 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1097 that rogue child processes cannot use them.
1099 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1100 run-time user, instead of root.
1102 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1103 Exim run-time user without dropping privileges.
1105 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1106 result string, instead of calling string_vformat() twice with the same
1109 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1110 for other users. Others should always drop root privileges if they use
1111 -C on the command line, even for a whitelisted configure file.
1113 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1115 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1121 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1122 $data_path, and $header_path variables; fixed documentation bugs and
1125 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1126 exipick to access non-standard spools, including the "frozen" queue
1129 NM/01 Bugzilla 965: Support mysql stored procedures.
1130 Patch from Alain Williams
1132 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1134 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1135 Patch from Andreas Metzler
1137 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1138 Patch from Kirill Miazine
1140 NM/05 Bugzilla 671: Added umask to procmail example.
1142 JJ/03 installed exipick 20100323.0, fixing doc bug
1144 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1145 directory. Notification and patch from Dan Rosenberg.
1147 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1149 TK/02 Improve log output when DKIM signing operation fails.
1151 MH/01 Treat the transport option dkim_domain as a colon separated
1152 list, not as a single string, and sign the message with each element,
1153 omitting multiple occurences of the same signer.
1155 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1156 Bugzilla 985, 986. Patch by Simon Arlott
1158 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1159 Patch by Simon Arlott
1161 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1162 MBX locking. Notification from Dan Rosenberg.
1168 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1170 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1172 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1174 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1176 NM/04 Bugzilla 915: Flag broken perl installation during build.
1182 TK/01 Added patch by Johannes Berg that expands the main option
1183 "spamd_address" if it starts with a dollar sign.
1185 TK/02 Write list of recipients to X-Envelope-Sender header when building
1186 the mbox-format spool file for content scanning (suggested by Jakob
1189 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1190 (http://www.dcc-servers.net/) support via dccifd. Activated by
1191 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1193 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1194 by Mark Daniel Reidel <mr@df.eu>.
1196 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1197 When building exim an external PCRE library is now needed -
1198 PCRE is a system library on the majority of modern systems.
1199 See entry on PCRE_LIBS in EDITME file.
1201 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1202 conversation. Added nologin parameter to request.
1203 Patch contributed by Kirill Miazine.
1205 TF/01 Do not log submission mode rewrites if they do not change the address.
1207 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1209 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1210 log files in place. Contributed by Roberto Lima.
1212 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1214 TF/03 Bugzilla 615: When checking the local_parts router precondition
1215 after a local_part_suffix or local_part_prefix option, Exim now
1216 does not use the address's named list lookup cache, since this
1217 contains cached lookups for the whole local part.
1219 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1220 Robert Millan. Documentation is in experimental-spec.txt.
1222 TF/04 Bugzilla 668: Fix parallel build (make -j).
1224 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1226 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1227 Patch provided by Jan Srzednicki.
1229 TF/05 Leading white space used to be stripped from $spam_report which
1230 wrecked the formatting. Now it is preserved.
1232 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1233 that they are available at delivery time.
1235 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1237 TF/08 TLS error reporting now respects the incoming_interface and
1238 incoming_port log selectors.
1240 TF/09 Produce a more useful error message if an SMTP transport's hosts
1241 setting expands to an empty string.
1243 NM/06 Bugzilla 744: EXPN did not work under TLS.
1244 Patch provided by Phil Pennock.
1246 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1247 Patch provided by Richard Godbee.
1249 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1250 acl_smtp_notquit, added index entry.
1252 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1253 Patch provided by Eugene Bujak.
1255 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1256 accept(). Patch provided by Maxim Dounin.
1258 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1259 Patch provided by Phil Pennock.
1261 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1263 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1264 Patch provided by Brad "anomie" Jorsch.
1266 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1267 Patch provided by Dean Brooks.
1269 TK/05 Add native DKIM support (does not depend on external libraries).
1271 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1272 Patch provided by Graeme Fowler.
1274 NM/16 Bugzilla 851: Documentation example syntax fix.
1276 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1278 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1281 NM/19 Bugzilla 745: TLS version reporting.
1282 Patch provided by Phil Pennock.
1284 NM/20 Bugzilla 167: bool: condition support.
1285 Patch provided by Phil Pennock.
1287 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1288 clients. Patch provided by Phil Pennock.
1290 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1291 Patch provided by Brad "anomie" Jorsch.
1293 NM/23 Bugzilla 687: Fix misparses in eximstats.
1294 Patch provided by Heiko Schlittermann.
1296 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1297 Patch provided by Heiko Schlittermann.
1299 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1300 plus update to original patch.
1302 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1304 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1305 Patch provided by David Brownlee.
1307 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1309 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1311 NM/30 Bugzilla 888: TLS documentation bugfixes.
1313 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1315 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1316 Unlike the original bugzilla I have changed all shell scripts in src tree.
1318 NM/33 Bugzilla 898: Transport filter timeout fix.
1319 Patch by Todd Rinaldo.
1321 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1322 Patch by Serge Demonchaux.
1324 NM/35 Bugzilla 39: Base64 decode bug fixes.
1325 Patch by Jakob Hirsch.
1327 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1329 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1331 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1333 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1339 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1340 ALT-N's libdkim that I have put here:
1341 http://duncanthrax.net/exim-experimental/
1343 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1344 were called 'true' and it seems that C99 defines that as a reserved
1345 keyword to be used with 'bool' variable types. That means you could
1346 not include C99-style headers which use bools without triggering
1347 build errors in sieve.c.
1349 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1350 as mailq or other aliases. Changed the --help handling significantly
1351 to do whats expected. exim_usage() emits usage/help information.
1353 SC/01 Added the -bylocaldomain option to eximstats.
1355 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1357 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1359 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1365 PH/01 Another patch from the Sieve maintainer.
1367 PH/02 When an IPv6 address is converted to a string for single-key lookup
1368 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1369 dots are used instead of colons so that keys in lsearch files need not
1370 contain colons. This was done some time before quoting was made available
1371 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1372 (notated using the quote facility) so as to distinguish them from IPv4
1373 keys. This meant that lookups for IP addresses in host lists did not work
1374 for iplsearch lookups.
1376 This has been fixed by arranging for IPv6 addresses to be expressed with
1377 colons if the lookup type is iplsearch. This is not incompatible, because
1378 previously such lookups could never work.
1380 The situation is now rather anomolous, since one *can* have colons in
1381 ordinary lsearch keys. However, making the change in all cases is
1382 incompatible and would probably break a number of configurations.
1384 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1387 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1388 conversion specification without a maximum field width, thereby enabling
1389 a rogue spamd server to cause a buffer overflow. While nobody in their
1390 right mind would setup Exim to query an untrusted spamd server, an
1391 attacker that gains access to a server running spamd could potentially
1392 exploit this vulnerability to run arbitrary code as the Exim user.
1394 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1395 $primary_hostname instead of what libspf2 thinks the hosts name is.
1397 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1398 a directory entry by the name of the lookup key. Previously, if a
1399 symlink pointed to a non-existing file or a file in a directory that
1400 Exim lacked permissions to read, a lookup for a key matching that
1401 symlink would fail. Now it is enough that a matching directory entry
1402 exists, symlink or not. (Bugzilla 503.)
1404 PH/03 The body_linecount and body_zerocount variables are now exported in the
1407 PH/04 Added the $dnslist_matched variable.
1409 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1410 This means they are set thereafter only if the connection becomes
1413 PH/06 Added the client_condition to authenticators so that some can be skipped
1414 by clients under certain conditions.
1416 PH/07 The error message for a badly-placed control=no_multiline_responses left
1417 "_responses" off the end of the name.
1419 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1421 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1422 (without spaces) instead of just copying the configuration text.
1424 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1426 PH/11 Added $max_received_linelength.
1428 PH/12 Added +ignore_defer and +include_defer to host lists.
1430 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1431 way in which PCRE > 7.0 is built.
1433 PH/14 Implemented queue_only_load_latch.
1435 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1436 MAIL command. The effect was to mangle the value on 64-bit systems.
1438 PH/16 Another patch from the Sieve maintainer.
1440 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1442 PH/18 If a system quota error occurred while trying to create the file for
1443 a maildir delivery, the message "Mailbox is full" was not appended to the
1444 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1445 only to a quota excession during the actual writing of the file.
1447 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1448 characters?) which causes problems in log lines. The DN values are now
1449 passed through string_printing() before being added to log lines.
1451 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1452 and InterBase are left for another time.)
1454 PH/21 Added message_body_newlines option.
1456 PH/22 Guard against possible overflow in moan_check_errorcopy().
1458 PH/23 POSIX allows open() to be a macro; guard against that.
1460 PH/24 If the recipient of an error message contained an @ in the local part
1461 (suitably quoted, of course), incorrect values were put in $domain and
1462 $local_part during the evaluation of errors_copy.
1468 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1469 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1472 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1473 issue a MAIL command.
1475 PH/02 In an ACL statement such as
1477 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1479 if a client was not listed at all, or was listed with a value other than
1480 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1481 the condition was not true (as it should be), so access was not denied.
1482 The bug was that the ! inversion was incorrectly passed on to the second
1483 item. This has been fixed.
1485 PH/03 Added additional dnslists conditions == and =& which are different from
1486 = and & when the dns lookup returns more than one IP address.
1488 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1489 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1491 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1492 FSYNC, which compiles an option called disable_fsync that allows for
1493 bypassing fsync(). The documentation is heavily laced with warnings.
1495 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1497 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1498 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1499 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1500 including adding "make clean"; (3) Added -fPIC when compiling the test
1501 dynamically loaded module, to get rid of a warning.
1503 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1504 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1505 = 0s. The bug is otherwise harmless.
1507 PH/07 There was a bug in the dovecot authenticator such that the value of
1508 $auth1 could be overwritten, and so not correctly preserved, after a
1509 successful authentication. This usually meant that the value preserved by
1510 the server_setid option was incorrect.
1512 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1514 PH/09 Installed PCRE release 7.0.
1516 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1517 run for batched SMTP input. It is now run at the start of every message
1518 in the batch. While fixing this I discovered that the process information
1519 (output by running exiwhat) was not always getting set for -bs and -bS
1520 input. This is fixed, and it now also says "batched" for BSMTP.
1522 PH/11 Added control=no_pipelining.
1524 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1525 patch, slightly modified), and move the expansion of helo_data till after
1526 the connection is made in the smtp transport (so it can use these
1529 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1531 PH/14 Added log_selector = +pid.
1533 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1535 PH/16 Add ${if forany and ${if forall.
1537 PH/17 Added dsn_from option to vary the From: line in DSNs.
1539 PH/18 Flush SMTP output before performing a callout, unless control =
1540 no_callout_flush is set.
1542 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1543 was true (the default) a successful delivery failed to delete the retry
1544 item, thus causing premature timeout of the address. The bug is now
1547 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1549 PH/21 Long custom messages for fakedefer and fakereject are now split up
1550 into multiline reponses in the same way that messages for "deny" and
1551 other ACL rejections are.
1553 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1554 with slight modification.
1556 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1557 draft, changing the syntax and factoring some duplicate code".
1559 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1560 for deliveries of the second and subsequent messages over the same SMTP
1563 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1564 ${reduce, with only minor "tidies".
1566 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1568 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1569 expansion side effects.
1571 PH/27 When a message times out after an over-quota error from an Exim-imposed
1572 quota, the bounce message says "mailbox is full". This message was not
1573 being given when it was a system quota that was exceeded. It now should
1576 MH/03 Made $recipients available in local_scan(). local_scan() already has
1577 better access to the recipient list through recipients_list[], but
1578 $recipients can be useful in postmaster-provided expansion strings.
1580 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1581 in the case of a MAIL command with additional options following the
1582 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1583 were accidentally chopped off.
1585 PH/29 SMTP synchronization checks are implemented when a command is read -
1586 there is a check that no more input is waiting when there shouldn't be
1587 any. However, for some commands, a delay in an ACL can mean that it is
1588 some time before the response is written. In this time, more input might
1589 arrive, invalidly. So now there are extra checks after an ACL has run for
1590 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1591 pipelining has not been advertised.
1593 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1595 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1596 returned in the SMTP response when smtp_return_error_details was false.
1597 This has been fixed.
1599 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1600 instead of the C I/O that was originally supplied, because problems were
1601 reported on Solaris.
1603 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1604 Exim which did not show up earlier: it was assuming that a call to
1605 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1606 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1607 was a macro that became an assignment, so it seemed to work. This has
1608 changed to a proper function call with a void return, hence the compile
1609 error. Exim's code has been fixed.
1611 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1614 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1616 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1618 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1619 because it turns out to be too big or there is a timeout) there is no
1620 "Completed" line in the log. When some messages of this type were
1621 selected by exigrep, they were listed as "not completed". Others were
1622 picked up by some special patterns. I have improved the selection
1623 criteria to be more general.
1625 PH/38 The host_find_failed option in the manualroute router can now be set
1626 to "ignore", to completely ignore a host whose IP address cannot be
1627 found. If all hosts are ignored, the behaviour is controlled by the new
1628 host_all_ignored option.
1630 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1631 homing or because of multiple MX records with /mx) generated more than
1632 one IP address, and the following item turned out to be the local host,
1633 all the secondary addresses of the first item were incorrectly removed
1634 from the list, along with the local host and any following hosts (which
1635 is what is supposed to happen).
1637 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1638 whoever called Exim into the -H file. In the case of the daemon it was
1639 behaving confusingly. When first started, it used values for whoever
1640 started the daemon, but after a SIGHUP it used the Exim user (because it
1641 calls itself on a restart). I have changed the code so that it now always
1644 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1645 message are rejected with the same error (e.g. no authentication or bad
1646 sender address), and a DATA command is nevertheless sent (as can happen
1647 with PIPELINING or a stupid MUA), the error message that was given to the
1648 RCPT commands is included in the rejection of the DATA command. This is
1649 intended to be helpful for MUAs that show only the final error to their
1652 PH/42 Another patch from the Sieve maintainer.
1654 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1655 Eximstats - Fixed some broken HTML links and added missing column headers
1657 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1658 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1660 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1662 PH/43 Yet another patch from the Sieve maintainer.
1664 PH/44 I found a way to check for a TCP/IP connection going away before sending
1665 the response to the final '.' that terminates a message, but only in the
1666 case where the client has not sent further data following the '.'
1667 (unfortunately, this is allowed). However, in many cases there won't be
1668 any further data because there won't be any more messages to send. A call
1669 to select() can be used: if it shows that the input is "ready", there is
1670 either input waiting, or the socket has been closed. An attempt to read
1671 the next input character can distinguish the two cases. Previously, Exim
1672 would have sent an OK response which the client would never have see.
1673 This could lead to message repetition. This fix should cure that, at
1674 least in a lot of common cases.
1676 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1677 advertised in response to EHLO.
1683 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1684 fixed by 4.65/MH/01 (is this a record?) are fixed:
1686 (i) An empty string was always treated as zero by the numeric comparison
1687 operators. This behaviour has been restored.
1689 (ii) It is documented that the numeric comparison operators always treat
1690 their arguments as decimal numbers. This was broken in that numbers
1691 starting with 0 were being interpreted as octal.
1693 While fixing these problems I realized that there was another issue that
1694 hadn't been noticed. Values of message_size_limit (both the global option
1695 and the transport option) were treated as octal if they started with 0.
1696 The documentation was vague. These values are now always treated as
1697 decimal, and I will make that clear in the documentation.
1703 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1704 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1707 MH/01 Don't check that the operands of numeric comparison operators are
1708 integers when their expansion is in "skipping" mode (fixes bug
1709 introduced by 4.64-PH/07).
1711 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1712 child addresses, Exim now panics and dies. Previously, because the count
1713 is held in a short int, deliveries were likely to be lost. As such a
1714 large number of recipients for a single message is ridiculous
1715 (performance will be very, very poor), I have chosen to impose a limit
1716 rather than extend the field.
1722 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1723 leftover -K file (the existence of which was triggered by #402).
1724 While we were at it, introduced process PID as part of the -K
1725 filename. This should rule out race conditions when creating
1728 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1729 processing considerably. Previous code took too long for large mails,
1730 triggering a timeout which in turn triggers #401.
1732 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1733 in the DK code in transports.c. sendfile() is not really portable,
1734 hence the _LINUX specificness.
1736 TF/01 In the add_headers option to the mail command in an Exim filter,
1737 there was a bug that Exim would claim a syntax error in any
1738 header after the first one which had an odd number of characters
1741 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1742 callout verification, Exim cached a "reject" for the entire domain. This
1743 is correct for most verifications, but it is not correct for a recipient
1744 verification with use_sender or use_postmaster set, because in that case
1745 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1746 case of MAIL FROM:<> rejection from other early rejections (e.g.
1747 rejection of HELO). When verifying a recipient using a non-null MAIL
1748 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1749 Whatever the result of the callout, the value of the domain cache is
1750 left unchanged (for any other kind of callout, getting as far as trying
1751 RCPT means that the domain itself is ok).
1753 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1756 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1757 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1758 session, the daemon ignores ECONNECT errors and logs others; it now
1759 ignores EPIPE as well.
1761 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1762 (quoted-printable decoding).
1764 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1765 later the small subsequent patch to fix an introduced bug.
1767 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1769 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1771 PH/08 An error is now given if message_size_limit is specified negative.
1773 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1774 to be given (somewhat) arbitrary names.
1776 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1779 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1780 miscellaneous code fixes
1782 PH/10 Added the log_reject_target ACL modifier to specify where to log
1785 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1786 hostname. This is wrong, because it relates to the incoming message (and
1787 probably the interface on which it is arriving) and not to the outgoing
1788 callout (which could be using a different interface). This has been
1789 changed to use the value of the helo_data option from the smtp transport
1790 instead - this is what is used when a message is actually being sent. If
1791 there is no remote transport (possible with a router that sets up host
1792 addresses), $smtp_active_hostname is used.
1794 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1795 tweaks were necessary in order to get it to work (see also 21 below):
1796 (a) The code assumed that strncpy() returns a negative number on buffer
1797 overflow, which isn't the case. Replaced with Exim's string_format()
1799 (b) There were several signed/unsigned issues. I just did the minimum
1800 hacking in of casts. There is scope for a larger refactoring.
1801 (c) The code used strcasecmp() which is not a standard C function.
1802 Replaced with Exim's strcmpic() function.
1803 (d) The code set only $1; it now sets $auth1 as well.
1804 (e) A simple test gave the error "authentication client didn't specify
1805 service in request". It would seem that Dovecot has changed its
1806 interface. Fortunately there's a specification; I followed it and
1807 changed what the client sends and it appears to be working now.
1809 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1812 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1813 address A is aliased to B and C, where B exists and C does not. Without
1814 -v the output is "A verified" because verification stops after a
1815 successful redirection if more than one address is generated. However,
1816 with -v the child addresses are also verified. Exim was outputting "A
1817 failed to verify" and then showing the successful verification for C,
1818 with its parentage. It now outputs "B failed to verify", showing B's
1819 parentage before showing the successful verification of C.
1821 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1822 look up a TXT record in a specific list after matching in a combined
1825 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1826 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1827 they consult the DNS. I had assumed they would set it the way they
1828 wanted; and indeed my experiments on Linux seem to show that in some
1829 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1830 To be on the safe side, however, I have now made the interface to
1831 host_find_byname() similar to host_find_bydns(), with an argument
1832 containing the DNS resolver options. The host_find_byname() function now
1833 sets these options at its start, just as host_find_bydns() does. The smtp
1834 transport options dns_qualify_single and dns_search_parents are passed to
1835 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1836 of host_find_byname() use the default settings of RES_DEFNAMES
1837 (qualify_single) but not RES_DNSRCH (search_parents).
1839 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1840 spool_read_header() do less string testing, by means of a preliminary
1841 switch on the second character of optional "-foo" lines. (This is
1842 overdue, caused by the large number of possibilities that now exist.
1843 Originally there were few.) While I was there, I also converted the
1844 str(n)cmp tests so they don't re-test the leading "-" and the first
1845 character, in the hope this might squeeze out yet more improvement.
1847 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1848 flag allowing group syntax was set by the header_syntax check but not
1849 turned off, possible causing trouble later; (2) The flag was not being
1850 set at all for the header_verify test, causing "group"-style headers to
1851 be rejected. I have now set it in this case, and also caused header_
1852 verify to ignore an empty address taken from a group. While doing this, I
1853 came across some other cases where the code for allowing group syntax
1854 while scanning a header line wasn't quite right (mostly, not resetting
1855 the flag correctly in the right place). These bugs could have caused
1856 trouble for malformed header lines. I hope it is now all correct.
1858 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1859 with the "reply" argument non-NULL. The code, however (which originally
1860 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1861 but it didn't always do it. This confused somebody who was copying the
1862 code for some other use. I have removed all the tests.
1864 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1865 feature that was used to support insecure browsers during the U.S. crypto
1866 embargo. It requires special client support, and Exim is probably the
1867 only MTA that supported it -- and would never use it because real RSA is
1868 always available. This code has been removed, because it had the bad
1869 effect of slowing Exim down by computing (never used) parameters for the
1870 RSA_EXPORT functionality.
1872 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1873 authenticator to fail if there's a tab character in the incoming data
1874 (there should never be unless someone is messing about, as it's supposed
1875 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1876 if the connection is using TLS or if the remote IP is the same as the
1877 local IP, and the "valid-client-cert option" if a client certificate has
1880 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1881 authenticators. This can be used for authorization after authentication
1882 succeeds. (In the case of plaintext, it servers for both authentication
1885 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1886 if any retry times were supplied.
1888 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1889 connection, where there is no client IP address to check. In this
1890 situation, the verify now always succeeds.
1892 PH/25 Applied John Jetmore's -Mset patch.
1894 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1896 PH/27 In a string expansion for a processed (not raw) header when multiple
1897 headers of the same name were present, leading whitespace was being
1898 removed from all of them, but trailing whitespace was being removed only
1899 from the last one. Now trailing whitespace is removed from each header
1900 before concatenation. Completely empty headers in a concatenation (as
1901 before) are ignored.
1903 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1904 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1906 PH/29 [Removed. This was a change that I later backed out, and forgot to
1907 correct the ChangeLog entry (that I had efficiently created) before
1908 committing the later change.]
1910 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1911 address errors (4xx response to RCPT) over the same connection as other
1912 messages routed to the same hosts. Such deliveries are always "forced",
1913 so retry times are not inspected. This resulted in far too many retries
1914 for the affected addresses. The effect occurred only when there were more
1915 hosts than the hosts_max_try setting in the smtp transport when it had
1916 the 4xx errors. Those hosts that it had tried were not added to the list
1917 of hosts for which the message was waiting, so if all were tried, there
1918 was no problem. Two fixes have been applied:
1920 (i) If there are any address or message errors in an SMTP delivery, none
1921 of the hosts (tried or untried) are now added to the list of hosts
1922 for which the message is waiting, so the message should not be a
1923 candidate for sending over the same connection that was used for a
1924 successful delivery of some other message. This seems entirely
1925 reasonable: after all the message is NOT "waiting for some host".
1926 This is so "obvious" that I'm not sure why it wasn't done
1927 previously. Hope I haven't missed anything, but it can't do any
1928 harm, as the worst effect is to miss an optimization.
1930 (ii) If, despite (i), such a delivery is accidentally attempted, the
1931 routing retry time is respected, so at least it doesn't keep
1932 hammering the server.
1934 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1935 in ${readsocket because some servers need this prod.
1937 PH/32 Added some extra debug output when updating a wait-xxx database.
1939 PH/33 The hint "could be header name not terminated by colon", which has been
1940 given for certain expansion errors for a long time, was not being given
1941 for the ${if def:h_colon_omitted{... case.
1943 PH/34 The spec says: "With one important exception, whenever a domain list is
1944 being scanned, $domain contains the subject domain." There was at least
1945 one case where this was not true.
1947 PH/35 The error "getsockname() failed: connection reset by peer" was being
1948 written to the panic log as well as the main log, but it isn't really
1949 panic-worthy as it just means the connection died rather early on. I have
1950 removed the panic log writing for the ECONNRESET error when getsockname()
1953 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1954 runs only) independently of the message's sender address. This meant
1955 that, if the 4xx error was in fact related to the sender, a different
1956 message to the same recipient with a different sender could confuse
1957 things. In particualar, this can happen when sending to a greylisting
1958 server, but other circumstances could also provoke similar problems.
1959 I have changed the default so that the retry time for these errors is now
1960 based a combination of the sender and recipient addresses. This change
1961 can be overridden by setting address_retry_include_sender=false in the
1964 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1965 remote server are returned as part of bounce messages. This was not
1966 happening for LMTP over a pipe (the lmtp transport), but now it is the
1967 same for both kinds of LMTP.
1969 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1970 in header lines that were in fact CNAMEs. This is no longer the case.
1972 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1973 and queue runs started by the daemon processed all messages. This has
1974 been fixed so that -R and -S can now usefully be given with -q<time>.
1976 PH/40 Import PCRE release 6.7 (fixes some bugs).
1978 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1980 PH/42 Give an error if -q is specified more than once.
1982 PH/43 Renamed the variables $interface_address and $interface_port as
1983 $received_ip_address and $received_port, to make it clear that these
1984 values apply to message reception, and not to the outgoing interface when
1985 a message is delivered. (The old names remain recognized, of course.)
1987 PH/44 There was no timeout on the connect() call when using a Unix domain
1988 socket in the ${readsocket expansion. There now is.
1990 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1991 be meaningful with "accept".
1993 SC/01 Eximstats V1.43
1994 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1996 SC/02 Eximstats V1.44
1997 Use a glob alias rather than an array ref in the generated
1998 parser. This improves both readability and performance.
2000 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2001 Collect SpamAssassin and rejection statistics.
2002 Don't display local sender or destination tables unless
2003 there is data to show.
2004 Added average volumes into the top table text output.
2006 SC/04 Eximstats V1.46
2007 Collect data on the number of addresses (recipients)
2008 as well as the number of messages.
2010 SC/05 Eximstats V1.47
2011 Added 'Message too big' to the list of mail rejection
2012 reasons (thanks to Marco Gaiarin).
2014 SC/06 Eximstats V1.48
2015 Mainlog lines which have GMT offsets and are too short to
2016 have a flag are now skipped.
2018 SC/07 Eximstats V1.49 (Alain Williams)
2019 Added the -emptyok flag.
2021 SC/08 Eximstats V1.50
2022 Fixes for obtaining the IP address from reject messages.
2024 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2025 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2026 whitesspace changes from 4.64-PH/27
2028 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2031 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2032 are found, allow negative numbers in numeric criteria)
2034 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2036 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2037 to match changes made in 4.64-PH/43
2039 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2041 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2042 "domain" is actually an IP address, and force a failure. This locks out
2043 those revolvers/nameservers that support "A-for-A" lookups, in
2044 contravention of the specifications.
2046 PH/48 When a host name was looked up from an IP address, and the subsequent
2047 forward lookup of the name timed out, the host name was left in
2048 $sender_host_name, contrary to the specification.
2050 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2051 restricted to single-key lookups, Exim was not diagnosing an error if
2052 * or *@ was used with a query-style lookup.
2054 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2056 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2057 long ago, but noone interested enough thought of it. Let's just say that
2058 the "1.1" means that there are some new functions that weren't there at
2059 some point in the past.
2061 PH/51 Error processing for expansion failure of helo_data from an smtp
2062 transport during callout processing was broken.
2064 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2065 tested/used via the -bh/-bhc/-bs options.
2067 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2068 bug, fixed in subsequent PCRE releases).
2070 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2071 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2073 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2079 SC/01 Use a glob alias rather than an array ref in eximstats generated
2080 parser. This improves both readability and performance.
2082 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2083 Don't display local sender or destination tables in eximstats unless
2084 there is data to show.
2085 Added average volumes into the eximstats top table text output.
2087 SC/03 Collect data on the number of addresses (recipients) as well
2088 as the number of messages in eximstats.
2090 TF/01 Correct an error in the documentation for the redirect router. Exim
2091 does (usually) call initgroups() when daemonizing.
2093 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2094 with consistent privilege compared to when running as a daemon.
2096 TF/03 Note in the spec that $authenticated_id is not set for local
2097 submissions from trusted users.
2099 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2100 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2102 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2103 by adding some example configuration directives to the default
2104 configuration file. A little bit of work is required to uncomment the
2105 directives and define how usernames and passwords are checked, but
2106 there is now a framework to start from.
2108 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2109 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2110 without this. I don't know how relevant this is to other LDAP libraries.
2112 PH/02 Add the verb name to the "unknown ACL verb" error.
2114 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2116 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2118 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2119 directory not expanded when it should be if an expanded home directory
2120 was set for the address (which is overridden by the transport).
2122 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2125 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2126 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2127 because it is too late at that time, and has no effect.
2129 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2130 security issue with \' (bugzilla #107). I could not use the
2131 PQescapeStringConn() function, because it needs a PGconn value as one of
2134 PH/08 When testing addresses using -bt, indicate those final addresses that
2135 are duplicates that would not cause an additional delivery. At least one
2136 person was confused, thinking that -bt output corresponded to deliveries.
2137 (Suppressing duplicates isn't a good idea as you lose the information
2138 about possibly different redirections that led to the duplicates.)
2140 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2141 systems where poll() doesn't work, in particular OS X.
2143 PH/10 Added more information to debugging output for retry time not reached.
2145 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2146 operations in malware.c.
2148 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2151 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2152 syslog_duplication set false, log lines that would normally be written
2153 both the the main log and to the reject log were not written to syslog at
2156 PH/14 In the default configuration, change the use of "message" in ACL warn
2157 statements to "add_header".
2159 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2160 not followed by a command (e.g. "seen endif").
2162 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2163 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2166 PH/17 Added extra conditions to the default value of delay_warning_condition
2170 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2171 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2172 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2175 The Auto-Submitted: and various List- headers are standardised, whereas I
2176 don't think Precedence: ever was.
2178 PH/18 Refactored debugging code in route_finduser() to show more information,
2179 in particular, the error code if getpwnam() issues one.
2181 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2182 This is apparently needed in addition to the PH/07 change above to avoid
2183 any possible encoding problems.
2185 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2186 but not after initializing Perl.
2188 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2189 output them only if debugging. By default they are written stderr,
2190 apparently, which is not desirable.
2192 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2195 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2198 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2200 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2201 authenticated or an ident call has been made. Suppress the default
2202 values for $authenticated_id and $authenticated_sender (but permit -oMai
2203 and -oMas) when testing with -bh.
2205 PH/24 Re-jigged the order of the tests in the default configuration so that the
2206 tests for valid domains and recipients precede the DNS black list and CSA
2207 tests, on the grounds that those ones are more expensive.
2209 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2210 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2211 This bug exists in every version of Exim that I still have, right back to
2214 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2215 However, an attempt to turn on case-sensitivity in a regex key by
2216 including (?-i) didn't work because the subject string was already
2217 lowercased, and the effects were non-intuitive. It turns out that a
2218 one-line patch can be used to allow (?-i) to work as expected.
2224 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2225 other effects) broke the use of negated acl sub-conditions.
2227 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2230 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2231 "Deny" causes Exim to reject the incoming connection with a 554 error.
2232 Unfortunately, if there is a major crisis, such as a disk failure,
2233 tcp-wrappers gives "deny", whereas what one would like would be some
2234 kind of temporary error. A kludge has been added to help with this.
2235 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2236 554 error is used if errno is still zero or contains ENOENT (which occurs
2237 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2240 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2242 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2243 errors. Otherwise a message that provokes a temporary error (when other
2244 messages do not) can cause a whole host to time out.
2246 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2247 addresses were routed directly to files or pipes from a redirect router.
2248 File deliveries just didn't batch; pipe deliveries might have suffered
2251 PH/06 A failure to get a lock for a hints database would erroneously always say
2252 "Failed to get write lock", even when it was really a read lock.
2254 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2255 of 0600. This has been changed to use the value of the lockfile_mode
2256 option (which defaults to 0600).
2258 PH/08 Applied small patch from the Sieve maintainer.
2260 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2261 folder from quota calculations, a direct delivery into this folder messed
2262 up the contents of the maildirsize file. This was because the regex was
2263 used only to exclude .Trash (or whatever) when the size of the mailbox
2264 was calculated. There was no check that a delivery was happening into an
2265 excluded directory. This bug has been fixed by ignoring all quota
2266 processing for deliveries into excluded directories.
2268 PH/10 Added the maildirfolder_create_regex option to appendfile.
2274 PH/01 The code for finding all the local interface addresses on a FreeBSD
2275 system running IPv6 was broken. This may well have applied to all BSD
2276 systems, as well as to others that have similar system calls. The broken
2277 code found IPv4 interfaces correctly, but gave incorrect values for the
2278 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2279 that it would not match correctly against @[] and not recognize the IPv6
2282 PH/02 The ipliteral router was not recognizing addresses of the form user@
2283 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2285 PH/03 Added disable_ipv6.
2287 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2288 decoded form, because it is most often used to construct To: headers
2289 lines in autoreplies, and the decoded form may well be syntactically
2290 invalid. However, $reply_address has leading white space removed, and all
2291 newlines turned into spaces so that the autoreply transport does not
2294 PH/05 If group was specified without a user on a router, and no group or user
2295 was specified on a transport, the group from the router was ignored.
2297 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2298 for visible compile-time settings that can be used to change these
2299 numbers, for those that want even more. Backwards compatibility with old
2300 spool files has been maintained. However, going back to a previous Exim
2301 release will lost any variables that are in spool files.
2303 PH/07 Two small changes when running in the test harness: increase delay when
2304 passing a TCP/IP connection to a new process, in case the original
2305 process has to generate a bounce, and remove special handling of
2306 127.0.0.2 (sic), which is no longer necessary.
2308 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2309 be the same on different OS.
2311 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2314 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2315 whether --show-vars was specified or not
2317 JJ/02 exipick: Added support for new ACL variable spool format introduced
2320 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2321 syntactically invalid From: or Reply-to: line, and a filter used this to
2322 generate an autoreply, and therefore failed to obtain an address for the
2323 autoreply, Exim could try to deliver to a non-existent relative file
2324 name, causing unrelated and misleading errors. What now happens is that
2325 it logs this as a hard delivery error, but does not attempt to create a
2328 PH/11 The exinext utility has a -C option for testing purposes, but although
2329 the given file was scanned by exinext itself; it wasn't being passed on
2330 when Exim was called.
2332 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2333 an end-of-file indication when reading a command response.
2335 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2336 compiled. In many other places in Exim, IPv6 addresses are always
2337 recognized, so I have changed this. It also means that IPv4 domain
2338 literals of the form [IPV4:n.n.n.n] are now always recognized.
2340 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2341 used if the router is not running as root, for example, when verifying at
2342 ACL time, or when using -bh. The debugging output from this situation was
2343 non-existent - all you got was a failure to exec. I have made two
2346 (a) Failures to set uid/gid, the current directory, or a process leader
2347 in a subprocess such as that created by queryprogram now generate
2348 suitable debugging ouput when -d is set.
2350 (b) The queryprogram router detects when it is not running as root,
2351 outputs suitable debugging information if -d is set, and then runs
2352 the subprocess without attempting to change uid/gid.
2354 PH/15 Minor change to Makefile for building test_host (undocumented testing
2357 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2358 additional section of a DNS packet that returns MX or SRV records.
2359 Instead, it always explicitly searches for A/AAAA records. This avoids
2360 major problems that occur when a DNS server includes only records of one
2361 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2362 fixed another bug: if SRV records were looked up and the corresponding
2363 address records were *not* found in the additional section, the port
2364 values from the SRV records were lost.
2366 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2367 using the correct key (the original address) when searching the retry
2368 rules in order to find which one to use for generating the retry hint.
2370 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2371 adding the default one. Similarly, if it contains a Reply-To: header, the
2372 errors_reply_to option, if set, is not used.
2374 PH/19 When calculating a retry time, Exim used to measure the "time since
2375 failure" by looking at the "first failed" field in the retry record. Now
2376 it does not use this if it is later than than the arrival time of the
2377 message. Instead it uses the arrival time. This makes for better
2378 behaviour in cases where some deliveries succeed, thus re-setting the
2379 "first failed" field. An example is a quota failure for a huge message
2380 when small messages continue to be delivered. Without this change, the
2381 "time since failure" will always be short, possible causing more frequent
2382 delivery attempts for the huge message than are intended.
2383 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2385 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2386 $1, $2, $3) because the numerical variables can be reset during some
2387 expansion items (e.g. "match"), thereby losing the authentication data.
2389 PH/21 Make -bV show the size of off_t variables so that the test suite can
2390 decide whether to run tests for quotas > 2G.
2392 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2393 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2394 filecount value is greater than 2G or if a quota value is greater than 2G
2395 on a system where the size of off_t is not greater than 4, a panic error
2398 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2399 never match. The debug and -bh output now contains an explicit error
2400 message indicating a malformed IPv4 address or mask.
2402 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2403 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2404 PH/23 above applies.
2406 PH/25 Do not write to syslog when running in the test harness. The only
2407 occasion when this arises is a failure to open the main or panic logs
2408 (for which there is an explicit test).
2410 PH/26 Added the /no_tell option to "control=freeze".
2412 PH/27 If a host name lookup failed very early in a connection, for example, if
2413 the IP address matched host_lookup and the reverse lookup yielded a name
2414 that did not have a forward lookup, an error message of the form "no IP
2415 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2416 could be logged. Now it outputs the IP address instead of "NULL".
2418 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2419 allows the sender and the authenticated sender to be set when
2420 submitting a message from within Exim. Since child_open_exim() is
2421 documented for local_scan(), the new function should be too.
2423 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2424 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2425 results in an empty string is now treated as unset.
2427 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2429 PH/31 Added sender_verify_fail logging option.
2431 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2432 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2433 tidied the source and removed it altogether.
2435 PH/33 When a queue run was abandoned because the load average was too high, a
2436 log line was always written; now it is written only if the queue_run log
2437 selector is set. In addition, the log line for abandonment now contains
2438 information about the queue run such as the pid. This is always present
2439 in "start" and "stop" lines but was omitted from the "abandon" line.
2441 PH/34 Omit spaces between a header name and the colon in the error message that
2442 is given when verify = headers_syntax fails (if there are lots of them,
2443 the message gets confusing).
2445 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2446 names, as there are now some PTR records that contain slashes. This check
2447 is only to protect against broken name servers that fall over on strange
2448 characters, so the fact that it applies to all lookups doesn't matter.
2450 PH/36 Now that the new test suite is complete, we can remove some of the
2451 special code in Exim that was needed for the old test suite. For example,
2452 sorting DNS records because real resolvers return them in an arbitrary
2453 order. The new test suite's fake resolver always returns records in the
2456 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2457 bounces) except when queue_only is set, to avoid logging races between
2458 the different processes.
2460 PH/38 Panic-die if .include specifies a non-absolute path.
2462 PH/39 A tweak to the "H" retry rule from its user.
2464 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2465 a label. They prevented compilation on older perls.
2467 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2468 a warning to be raised on newish perls.
2470 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2471 on queue. Changes to match documented behaviour of showing count of
2472 messages matching specified criteria.
2474 PH/40 Changed the default ident timeout from 30s to 5s.
2476 PH/41 Added support for the use of login_cap features, on those BSD systems
2477 that have them, for controlling the resources used by pipe deliveries.
2479 PH/42 The content-scanning code uses fopen() to create files in which to put
2480 message data. Previously it was not paying any attention to the mode of
2481 the files. Exim runs with umask(0) because the rest of the code creates
2482 files with open(), and sets the required mode explicitly. Thus, these
2483 files were ending up world-writeable. This was not a big issue, because,
2484 being within the spool directory, they were not world-accessible. I have
2485 created a function called modefopen, which takes an additional mode
2486 argument. It sets umask(777), creates the file, chmods it to the required
2487 mode, then resets the umask. All the relevant calls to fopen() in the
2488 content scanning code have been changed to use this function.
2490 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2491 to 24 hours. This avoids potential overflow problems when processing G
2492 and H retry rules. I suspect nobody ever tinkers with this value.
2494 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2496 PH/45 When the plaintext authenticator is running as a client, the server's
2497 challenges are checked to ensure they are valid base64 strings. By
2498 default, the authentication attempt is cancelled if an invalid string is
2499 received. Setting client_ignore_invalid_base64 true ignores these errors.
2500 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2501 they are received. Thus, the responses can be made to depend on the
2502 challenges. If an invalid string is ignored, an empty string is placed in
2505 PH/46 Messages that are created by the autoreply transport now contains a
2506 References: header, in accordance with RFCs 2822 and 3834.
2508 PH/47 Added authenticated_sender_force to the smtp transport.
2510 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2512 PH/49 Installed latest patch from the Sieve maintainer.
2514 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2515 was also set, the appendfile transport was unnecessarily scanning a
2516 directory of message files (e.g. for maildir delivery) to find the count
2517 of files (along with the size), even though it did not need this
2518 information. It now does the scan only if it needs to find either the
2519 size of the count of files.
2521 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2523 PH/52 Two bugs concerned with error handling when the smtp transport is
2526 (i) Exim was not creating retry information for temporary errors given
2527 for individual recipients after the DATA command when the smtp transport
2528 was used in LMTP mode. This meant that they could be retried too
2529 frequently, and not timed out correctly.
2531 (ii) Exim was setting the flag that allows error details to be returned
2532 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2533 recipients that were returned after the DATA command.
2535 PH/53 This is related to PH/52, but is more general: for any failing address,
2536 when detailed error information was permitted to be returned to the
2537 sender, but the error was temporary, then after the final timeout, only
2538 "retry timeout exceeded" was returned. Now it returns the full error as
2539 well as "retry timeout exceeded".
2541 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2542 do this, and (what is worse) MTAs that accept it.
2544 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2545 will now be deprecated.
2547 PH/56 New os.c-cygwin from the Cygwin maintainer.
2549 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2550 formats (previously only available in exim formats via -bpr, -bpru,
2551 and -bpra. Now also available in native and exiqgrep formats)
2553 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2554 with very large, slow to parse queues
2556 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2558 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2560 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2561 responses to authentication challenges, though it was showing the
2562 challenges; (ii) I've removed the CR characters from the debug output for
2565 PH/58 Allow for the insertion of a newline as well as a space when a string
2566 is turned into more than one encoded-word during RFC 2047 encoding. The
2567 Sieve code now uses this.
2569 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2570 data_4xx, lost_connection, tls_required.
2572 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2573 message was being sent as an SMTP response.
2575 PH/61 Add -l and -k options to exicyclog.
2577 PH/62 When verifying, if an address was redirected to one new address, so that
2578 verification continued, and the new address failed or deferred after
2579 having set something in $address_data, the value of $address_data was not
2580 passed back to the ACL. This was different to the case when no
2581 redirection occurred. The value is now passed back in both cases.
2583 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2584 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2585 use login_cap.h, so on its own it isn't the distinguishing feature. The
2586 new name refers directly to the setclassresources() function.
2588 PH/65 Added configuration files for NetBSD3.
2590 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2592 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2593 is preferred over IPv4.
2595 PH/68 The bounce_return_message and bounce_return_body options were not being
2596 honoured for bounces generated during the reception of non-SMTP messages.
2597 In particular, this applied to messages rejected by the ACL. This bug has
2598 been fixed. However, if bounce_return_message is true and bounce_return_
2599 body is false, the headers that are returned for a non-SMTP message
2600 include only those that have been read before the error was detected.
2601 (In the case of an ACL rejection, they have all been read.)
2603 PH/69 The HTML version of the specification is now built in a directory called
2604 spec_html instead of spec.html, because the latter looks like a path with
2605 a MIME-type, and this confuses some software.
2607 PH/70 Catch two compiler warnings in sieve.c.
2609 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2610 function verify_get_ident() calls ip_connect() to connect a socket, but
2611 if the "connect()" function timed out, ip_connect() used to close the
2612 socket. However, verify_get_ident() also closes the socket later, and in
2613 between Exim writes to the log, which may get opened at this point. When
2614 the socket was closed in ip_connect(), the log could get the same file
2615 descriptor number as the socket. This naturally causes chaos. The fix is
2616 not to close the socket in ip_connect(); the socket should be closed by
2617 the function that creates it. There was only one place in the code where
2618 this was missing, in the iplookup router, which I don't think anybody now
2619 uses, but I've fixed it anyway.
2621 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2622 well as to direct DNS lookups. Otherwise the handling of names in host
2623 lists is inconsistent and therefore confusing.
2629 PH/01 Two changes to the default runtime configuration:
2631 (1) Move the checks for relay_from_hosts and authenticated clients from
2632 after to before the (commented out) DNS black list checks.
2634 (2) Add control=submission to the relay_from_hosts and authenticated
2635 clients checks, on the grounds that messages accepted by these
2636 statements are most likely to be submissions.
2638 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2640 (1) Generate an error if the third argument for the ${prvs expansion is
2643 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2646 (3) Reset the variables that are obtained from the first argument of
2647 ${prvscheck and used in the second argument before leaving the code,
2648 because their memory is reclaimed, so using them afterwards may do
2651 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2652 one (it's much easier than Tom thought :-).
2654 (5) Because of (4), we can now allow for the use of $prvscheck_result
2655 inside the third argument.
2657 PH/03 For some reason, the default setting of PATH when running a command from
2658 a pipe transport was just "/usr/bin". I have changed it to
2661 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2662 anything to be listed in the output from -bV.
2664 PH/05 When a filter generated an autoreply, the entire To: header line was
2665 quoted in the delivery log line, like this:
2667 => >A.N.Other <ano@some.domain> <original@ddress> ...
2669 This has been changed so that it extracts the operative address. There
2670 may be more than one such address. If so, they are comma-separated, like
2673 => >ano@some.domain,ona@other.domain <original@ddress> ...
2675 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2676 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2677 not being looked up in the rDNS to get a host name, Exim was showing the
2678 IP address twice in Received: lines, even though the IP addresses were
2679 identical. For example:
2681 Received: from [1.2.3.4] (helo=[1.2.3.4])
2683 However, if the real host name was known, it was omitting the HELO data
2684 if it matched the actual IP address. This has been tidied up so that it
2685 doesn't show the same IP address twice.
2687 PH/07 When both +timestamp and +memory debugging was on, the value given by
2688 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2689 called by the debug printing, thereby overwriting the timestamp buffer.
2690 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2692 PH/08 When the original message was included in an autoreply transport, it
2693 always said "this is a copy of the message, including all the headers",
2694 even if body_only or headers_only was set. It now gives an appropriate
2697 PH/09 Applied a patch from the Sieve maintainer which:
2699 o fixes some comments
2700 o adds the (disabled) notify extension core
2701 o adds some debug output for the result of if/elsif tests
2702 o points to the current vacation draft in the documentation
2703 and documents the missing references header update
2707 o fixes a bug in processing the envelope test (when testing
2708 multiple envelope elements, the last element determinted the
2711 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2712 Electronic Mail") by including:
2714 Auto-submitted: auto-generated
2716 in the messages that it generates (bounce messages and others, such as
2717 warnings). In the case of bounce messages for non-SMTP mesages, there was
2718 also a typo: it was using "Auto_submitted" (underscore instead of
2719 hyphen). Since every message generated by Exim is necessarily in response
2720 to another message, thes have all been changed to:
2722 Auto-Submitted: auto-replied
2724 in accordance with these statements in the RFC:
2726 The auto-replied keyword:
2728 - SHOULD be used on messages sent in direct response to another
2729 message by an automatic process,
2731 - MUST NOT be used on manually-generated messages,
2733 - MAY be used on Delivery Status Notifications (DSNs) and Message
2734 Disposition Notifications (MDNs),
2736 - MUST NOT be used on messages generated by automatic or periodic
2737 processes, except for messages which are automatic responses to
2740 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2741 to the default Received: header definition.
2743 PH/12 Added log selector acl_warn_skipped (default on).
2745 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2746 variables because (a) they are in the wrong storage pool and (b) even if
2747 they were copied, it wouldn't work properly because of the caching.
2749 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2750 checking when decoding. Apparently there are clients that generate
2751 overlong encoded strings. Why am I not surprised?
2753 PH/15 If the first argument of "${if match_address" was not empty, but did not
2754 contain an "@" character, Exim crashed. Now it writes a panic log message
2755 and treats the condition as false.
2757 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2759 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2760 extension "envelope-auth". The code is finished and in agreement with
2761 other implementations, but there is no documentation so far and in fact,
2762 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2763 not changing the active code.
2765 Print executed "if" and "elsif" statements when debugging is used. This
2766 helps a great deal to understand what a filter does.
2768 Document more things not specified clearly in RFC3028. I had all this
2769 sorted out, when out of a sudden new issues came to my mind. Oops."
2771 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2774 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2775 canonical form (as documented). However, after a host name lookup from
2776 the IP address, check_host() was doing a simple string comparison with
2777 addresses acquired from the DNS when checking that the found name did
2778 have the original IP as one of its addresses. Since any found IPv6
2779 addresses are likely to be in abbreviated form, the comparison could
2780 fail. Luckily, there already exists a function for doing the comparison
2781 by converting both addresses to binary, so now that is used instead of
2782 the text comparison.
2784 PH/20 There was another similar case to PH/19, when a complete host name was
2785 given in a host list; looking up its IP address could give an abbreviated
2786 form, whereas the current host's name might or might not be abbreviated.
2787 The same fix has been applied.
2793 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2794 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2797 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2798 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2800 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2802 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2803 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2804 Also, for "Auto-Submitted", treat anything other than "no" as
2805 non-personal, in accordance with RFC 3834. (Previously it treated
2806 anything starting "auto-" as non-personal.)
2808 TF/01 The control=submission/name=... option had a problem with syntax
2809 errors if the name included a slash character. The /name= option
2810 now slurps the rest of the string, so it can include any characters
2811 but it must come last in the list of options (after /sender_retain
2814 PH/05 Some modifications to the interface to the fake nameserver for the new
2822 TK/01 Added the "success_on_redirect" address verification option. See
2823 NewStuff for rationale and an example.
2825 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2827 PH/02 Patch to exigrep to allow it to work on syslog lines.
2829 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2830 fread() to skip over the body file's header line, because in Cygwin the
2831 header line is locked and is inaccessible.
2833 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2834 co-exist for some time) to make it clear that it is the Exim ID that is
2835 referenced, not the Message-ID: header line.
2837 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2838 string_format() function, because snprintf() does not exist on all
2841 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2842 ${stat: expansion item.
2844 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2845 protocol synchronization error", to keep the pedants happy.
2847 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2848 well as for IRIX systems, when gcc is being used. See the host.c source
2851 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2853 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2856 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2857 transport and to the smtp transport in LMTP mode.
2859 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2861 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2862 run a filter in a subprocess. This could lead to confusion in subsequent
2863 lookups in the parent process. There should also be a search_tidyup() at
2864 the end of the subprocess.
2866 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2867 only if the host matched helo_try_verify_hosts, which caused the
2868 verification to occur when the EHLO/HELO command was issued. The ACL just
2869 tested the remembered result. Now, if a previous verification attempt has
2870 not happened, "verify = helo" does it there and then.
2872 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2874 TK/03 Fix log output including CR from clamd.
2876 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2877 exist provoked a memory error which could cause a segfault.
2879 PH/15 Installed PCRE 6.2
2881 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2883 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2884 of the problem. Specifically, suggested +O2 rather than +O1 for the
2887 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2889 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2890 record, the port was not correctly logged when the outgoing_port log
2891 selector was set (it logged the transort's default port).
2893 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2894 fallback_hosts, and "hosts" in the smtp transport.
2896 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2897 host errors such as "Connection refused".
2899 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2900 authentication with radiusclient 0.4.9:
2902 - Error returned from rc_read_config was caught wrongly
2903 - Username/password not passed on to radius server due to wrong length.
2905 The presumption is that some radiusclient API changes for 4.51/PH/17
2906 were not taken care of correctly. The code is still untested by me (my
2907 Linux distribution still has 0.3.2 of radiusclient), but it was
2908 contributed by a Radius user.
2910 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2911 expanding the "port" option of the smtp transport.
2913 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2914 while reading a MIME header. Thanks to Tom Hughes for a patch.
2916 PH/24 Include config.h inside local_scan.h so that configuration settings are
2919 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2920 that in an ACL for RCPT (for example), you can examine exactly what was
2923 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2924 commands, but it was not correctly comparing the address with the actual
2925 client host address. Thus, it would show the EHLO address in Received:
2926 header lines when this was not necessary.
2928 PH/27 Added the % operator to ${eval:}.
2930 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2931 it should be ignoring failures (because with -C, for example, it has lost
2932 privilege). It wasn't ignoring creation failures other than "already
2935 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2938 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2939 because an input line was too long, either on its own, or by virtue of
2940 too many continuations, the temporary file was not being removed, and the
2941 return code was incorrect.
2943 PH/31 Missing "BOOL" in function definition in filtertest.c.
2945 PH/32 Applied Sieve patches from the maintainer.
2947 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2949 PH/33 Added "verify = not_blind".
2951 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2952 Local/Makefile (with some defaults set). These are used in built scripts
2953 such as exicyclog, but they have never been used in the exim_install
2954 script (though there are many overriding facilities there). I have
2955 arranged that the exim_install script now takes note of these two
2958 PH/35 Installed configuration files for Dragonfly.
2960 PH/36 When a locally submitted message by a trusted user did not contain a
2961 From: header, and the sender address was obtained from -f or from an SMTP
2962 MAIL command, and the trusted user did not use -F to supply a sender
2963 name, $originator_name was incorrectly used when constructing a From:
2964 header. Furthermore, $originator_name was used for submission mode
2965 messages from external hosts without From: headers in a similar way,
2966 which is clearly wrong.
2968 PH/37 Added control=suppress_local_fixups.
2970 PH/38 When log_selector = +received_sender was set, and the addition of the
2971 sender made the log line's construction buffer exactly full, or one byte
2972 less than full, an overflow happened when the terminating "\n" was
2975 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2976 when the result of a list match is failure because a DNS lookup failed.
2978 PH/40 RM_COMMAND is now used in the building process.
2980 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2981 the "build-* directories that it finds.
2983 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2984 address in a domain literal was a prefix of an interface address.
2986 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2987 when verifying a sender address, unless rewrite_headers is false.
2989 PH/44 Wrote a long comment about why errors_to addresses are verified as
2990 recipients, not senders.
2992 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2993 the ratelimit ACL was added.
2995 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2997 PH/46 Added extra information about PostgreSQL errors to the error string.
2999 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3000 avoiding the need to install special zones in a real server. This is
3001 backwards compatible; if it can't find the fake resolver, it drops back.
3002 Thus, both old and new test suites can be run.
3004 TF/02 Added util/ratelimit.pl
3006 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3007 clock is set back in time.
3009 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3010 Candler <B.Candler@pobox.com>.
3012 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3013 OK for addresses that are the result of redirections.
3015 PH/48 A number of further additions for the benefit of the new test suite,
3016 including a fake gethostbyname() that interfaces to the fake DNS resolver
3019 TF/06 The fix for widen_domains has also been applied to qualify_single and
3020 search_parents which are the other dnslookup options that can cause
3023 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3026 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3028 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3029 service" if it encountered an MX record with an empty target hostname.
3030 The message is now "an MX or SRV record indicated no SMTP service".
3032 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3033 if the DNS of the sending site is misconfigured. This is quite a
3034 common situation. This change restores the behaviour of treating a
3035 helo verification defer as a failure.
3037 PH/51 If self=fail was set on a router, the bounce message did not include the
3038 actual error message.
3044 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3046 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3047 command itself ended in error, the underlying message about the transport
3048 filter timeout was being overwritten with the pipe command error. Now the
3049 underlying error message should be appended to the second error message.
3051 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3053 PH/02 Reduce the amount of output that "make" produces by default. Full output
3054 can still be requested.
3056 PH/03 The warning log line about a condition test deferring for a "warn" verb
3057 was being output only once per connection, rather than after each
3058 occurrence (because it was using the same function as for successful
3059 "warn" verbs). This seems wrong, so I have changed it.
3061 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3062 it should not have, which might have caused a crash in the right
3063 circumstances, but probably never did.
3065 PH/04 Installed a modified version of Tony Finch's patch to make submission
3066 mode fix the return path as well as the Sender: header line, and to
3067 add a /name= option so that you can make the user's friendly name appear
3070 TF/03 Added the control = fakedefer ACL modifier.
3072 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3073 Mark Lowes for thorough testing.
3075 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3077 TK/03 Merged latest SRS patch from Miles Wilton.
3079 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3080 with the definition in sysexits.h (which is #included earlier).
3081 Fortunately, Exim does not actually use EX_OK. The code used to try to
3082 preserve the sysexits.h value, by assumimg that macro definitions were
3083 scanned for macro replacements. I have been disabused of this notion,
3084 so now the code just undefines EX_OK before #including unistd.h.
3086 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3087 in the smtp transport. When a block could not be written in a single
3088 write() function, the timeout was being re-applied to each part-write.
3089 This seems wrong - if the receiver was accepting one byte at a time it
3090 would take for ever. The timeout is now adjusted when this happens. It
3091 doesn't have to be particularly precise.
3093 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3094 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3096 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3097 without a domain if the check to <postmaster@domain> fails.
3099 SC/01 Eximstats: added -xls and the ability to specify output files
3100 (patch written by Frank Heydlauf).
3102 SC/02 Eximstats: use FileHandles for outputing results.
3104 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3106 SC/04 Eximstats: fixed display of large numbers with -nvr option
3108 SC/05 Eximstats: fixed merging of reports with empty tables.
3110 SC/06 Eximstats: added the -include_original_destination flag
3112 SC/07 Eximstats: removed tabs and trailing whitespace.
3114 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3116 TK/06 MBOX spool code: Add real "From " MBOX separator line
3117 so the .eml file is really in mbox format (even though
3118 most programs do not really care). Patch from Alex Miller.
3120 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3121 The latter is generated from $received_to and is only set if the
3122 message has one envelope recipient. SA can use these headers,
3123 obviously out-of-the-box. Patch from Alex Miller.
3125 PH/08 The ${def test on a variable was returning false if the variable's
3126 value was "0", contrary to what the specification has always said!
3127 The result should be true unless the variable is empty.
3129 PH/09 The syntax error of a character other than { following "${if
3130 def:variable_name" (after optional whitespace) was not being diagnosed.
3131 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3132 accidental colon was present, for example, could give incorrect results.
3134 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3135 result is used (not including appendfile, where other changes are about
3138 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3139 This involved changing a lot of size variables from int to off_t. It
3140 should work with maildirs and everything.
3142 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3143 spamd dying while we are connected to it.
3145 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3148 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3149 function for BDB 4.3.
3151 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3153 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3154 the sources for PCRE have been re-arranged and more files are now
3157 PH/15 The code I had for printing potentially long long variables in PH/11
3158 above was not the best (it lost precision). The length of off_t variables
3159 is now inspected at build time, and an appropriate printing format (%ld
3160 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3161 to be "long long int" or "long int". This is needed for the internal
3162 formatting function string_vformat().
3164 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3165 the configuration file to be ":syslog", then the script "guesses" where
3166 the logs files are, rather than using the compiled in default. In our
3167 case the guess is not the same as the compiled default, so the script
3168 suddenly stopped working when I started to use syslog. The patch checks
3169 to see if log_file_path is "". If so, it attempts to read it from exim
3170 with no configuration file to get the compiled in version, before it
3171 falls back to the previous guessing code."
3173 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3174 implementing BATV in an Exim configuration. See NewStuff for the gory
3177 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3178 Makefile that are specific to HP-UX.
3180 PH/18 If the "use_postmaster" option was set for a recipient callout together
3181 with the "random" option, the postmaster address was used as the MAIL
3182 FROM address for the random test, but not for the subsequent recipient
3183 test. It is now used for both.
3185 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3186 patch removes a few documentation additions to RFC 3028, because the
3187 latest draft now contains them. It adds the new en;ascii-case comparator
3188 and a new error check for 8bit text in MIME parts. Comparator and
3189 require names are now matched exactly. I enabled the subaddress
3190 extension, but it is not well tested yet (read: it works for me)."
3192 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3193 rework some of the code of TK/09 above to avoid the hardwired use of
3194 "%lld" and "long long". Replaced the call to snprintf() with a call to
3197 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3198 records point to non-existent hosts", "retry timeout exceeded", and
3199 "retry time not reached for any host after a long failure period".
3201 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3202 experimental DomainKeys support:
3204 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3205 (2) On an error such as an illegally used "control", the wrong name for
3206 the control was given.
3208 These problems did NOT occur unless DomainKeys support was compiled.
3210 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3212 PH/24 Added ${if match_ip condition.
3214 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3215 databases so that it will be absolutely obvious if a crash occurs in the
3216 DB library. This is a regular occurrence (often caused by mis-matched
3219 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3220 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3221 picked up on a user's system that detects such things. There doesn't seem
3222 to be a gcc warning option for this - only an attribute that has to be
3223 put on the function's prototype. It seems that in Fedora Core 4 they have
3224 set this on a number of new functions. No doubt there will be more in due
3227 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3228 specify a transport. However, if an address that was verified by such a
3229 router was the subject of a callout, Exim crashed because it tried to
3230 read the rcpt_include_affixes from the non-existent transport. Now it
3231 just assumes that the setting of that option is false. This bug was
3232 introduced by 4.51/PH/31.
3234 PH/28 Changed -d+all to exclude +memory, because that information is very
3235 rarely of interest, but it makes the output a lot bigger. People tend to
3236 do -d+all out of habit.
3238 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3239 code in os-type was giving problems when libc.so lives in lib64, like on
3242 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3243 aren't the modern standard, and it seems that some systems' include files
3244 don't always have them. Exim was already checking for some of the newer
3245 ones like T_AAAA, and defining it itself. I've added checks for all the
3246 record types that Exim uses.
3248 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3249 not automatically generating a new one, as it is supposed to. This
3250 prevented TLS from working. If the file did exist, but contained invalid
3251 data, a new version was generated, as expected. It was only the case of a
3252 non-existent file that was broken.
3254 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3255 with a change in libdomainkeys > 0.64.
3257 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3258 from DNS. If the selector record carries the flag, it now has
3259 precedence over the domain-wide flag.
3261 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3263 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3264 the use of a port name that isn't defined in /etc/services) occurred, the
3265 message was deferred as in a normal delivery, and thus remained on the
3266 spool, instead of being failed because of the mua_wrapper setting. This
3267 is now fixed, and I tidied up some of the mua_wrapper messages at the
3270 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3271 the messages in a hash of arrays rather than using individual hashes.
3272 This is a bit cleaner and results in dramatic memory savings, albeit
3273 at a slight CPU cost.
3275 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3276 as requested by Marc Sherman.
3278 SC/10 Eximstats: added histograms for user specified patterns as requested
3281 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3283 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3284 fopen() in the content-scanning modules that did not already have it.
3290 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3291 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3293 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3295 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3297 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3298 to test Sieve filters that use "vacation".
3300 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3301 that changes the way the GnuTLS parameters are stored in the cache file.
3302 The new format can be generated externally. For backward compatibility,
3303 if the data in the cache doesn't make sense, Exim assumes it has read an
3304 old-format file, and it generates new data and writes a new file. This
3305 means that you can't go back to an older release without removing the
3308 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3309 work if there are any delivery delays because "one_time" forces the
3310 parent to be marked "delivered", so its unseen clone is never tried
3311 again. For this reason, Exim now forbids the simultaneous setting of
3314 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3315 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3316 entry if you want to know the details. The fix, however, neglected to
3317 consider the case when local delivery batching is involved. The test for
3318 "previously delivered" was not happening when checking to see if an
3319 address could be batched with a previous (undelivered) one; under
3320 certain circumstances this could lead to multiple deliveries to the same
3323 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3324 in its include files, and this causes problems building Exim.
3326 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3327 header_syntax) but Exim was just ignoring anything given after a slash.
3328 In particular, this caused confusion with an attempt to use "verify =
3329 reverse_host_lookup/defer_ok". An error is now given when options are
3330 supplied for verify items that do not have them. (Maybe reverse_host_
3331 lookup should have a defer_ok option, but that's a different point.)
3333 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3334 defined by RFC 821) to 2048, because there were problems with some AUTH
3335 commands, and RFC 1869 says the size should be increased for extended
3336 SMTP commands that take arguments.
3338 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3341 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3342 "unknown" error; now it says that the functionality isn't in the binary.
3344 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3345 an address' error message when a string expansion fails (syntax or
3346 whatever). Otherwise the password may appear in the log. Following change
3347 PH/42 below, there is no longer a chance of it appearing in a bounce
3350 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3352 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3353 of its addresses was ever tried. (Bugzilla bug #2.)
3355 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3356 the result incorrectly in the debug output. (It correctly added a newline
3357 to what was transported.)
3359 TF/01 Added $received_time.
3361 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3362 commented out examples of how to interface to a virus scanner and to
3363 SpamAssassin. Also added commented examples of av_scanner and
3364 spamd_address settings.
3366 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3367 and controls are allowed in which ACLs. There were a couple of minor
3368 errors. Some of the entries in the conditions table (which is a table of
3369 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3370 negation of where the condition IS allowed.
3372 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3374 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3375 header file does not have a version number, so I've had to invent a new
3376 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3377 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3378 radiusclient), but it was contributed by a Radius user.
3380 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3381 files or directories, for OpenSSL.
3383 PH/19 When an Exim process that is running as root has to create an Exim log
3384 file, it does so in a subprocess that runs as exim:exim so as to get the
3385 ownership right at creation (otherwise, other Exim processes might see
3386 the file with the wrong ownership). There was no test for failure of this
3387 fork() call, which would lead to the process getting stuck as it waited
3388 for a non-existent subprocess. Forks do occasionally fail when resources
3389 run out. I reviewed all the other calls to fork(); they all seem to check
3392 PH/20 When checking for unexpected SMTP input at connect time (before writing
3393 the banner), Exim was not dealing correctly with a non-positive return
3394 from the read() function. If the client had disconnected by this time,
3395 the result was a log entry for a synchronization error with an empty
3396 string after "input=" when read() returned zero. If read() returned -1
3397 (an event I could not check), uninitialized data bytes were printed.
3398 There were reports of junk text (parts of files, etc) appearing after
3401 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3403 PH/22 Added support for macro redefinition, and (re)definition in between
3404 driver and ACL definitions.
3406 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3407 forgetting to use the resulting value; it was using the unexpanded value.
3409 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3410 hadn't been configured. The fix is from Juergen Kreileder, who
3411 understands it better than I do:
3413 "Here's what I see happening with three configured cyrus_sasl
3414 authenticators configured (plain, login, cram-md5):
3416 On startup auth_cyrus_sasl_init() gets called for each of these.
3417 This means three calls to sasl_listmech() without a specified mech_list.
3418 => SASL tests which mechs of all available mechs actually work
3419 => three warnings about OTP not working
3420 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3422 With the patch, sasl_listmech() also gets called three times. But now
3423 SASL's mech_list option is set to the server_mech specified in the the
3424 authenticator. Or in other words, the answer from sasl_listmech()
3425 gets limited to just the mech you're testing for (which is different
3427 => the return list contains just 'plain' or 'login', 'cram-md5' or
3428 nothing depending on the value of ob->server_mech.
3430 I've just tested the patch: Authentication still works fine,
3431 unavailable mechs specified in the exim configuration are still
3432 caught, and the auth.log warnings about OTP are gone."
3434 PH/25 When debugging is enabled, the contents of the command line are added
3435 to the debugging output, even when log_selector=+arguments is not
3438 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3439 answer is "GNU", and only if the return is "GNU/something" is the answer
3442 PH/27 $acl_verify_message is now set immediately after the failure of a
3443 verification in an ACL, and so is available in subsequent modifiers. In
3444 particular, the message can be preserved by coding like this:
3446 warn !verify = sender
3447 set acl_m0 = $acl_verify_message
3449 Previously, $acl_verify_message was set only while expanding "message"
3450 and "log_message" when a very denied access.
3452 PH/28 Modified OS/os.c-Linux with
3454 -#ifndef OS_LOAD_AVERAGE
3455 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3457 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3458 nomenclature these days.)
3460 PH/29 Installed patch from the Sieve maintainer that adds the options
3461 sieve_useraddress and sieve_subaddress to the redirect router.
3463 PH/30 In these circumstances:
3464 . Two addresses routed to the same list of hosts;
3465 . First host does not offer TLS;
3466 . First host accepts first address;
3467 . First host gives temporary error to second address;
3468 . Second host offers TLS and a TLS session is established;
3469 . Second host accepts second address.
3470 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3471 and peerdn, if requested) that were in fact used only for the second
3474 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3475 attention to any local part prefix or suffix that was matched by the
3476 router that accepted the address. It now behaves in the same way as it
3477 does for delivery: the affixes are removed from the local part unless
3478 rcpt_include_affixes is set on the transport.
3480 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3481 timeout during the DATA phase of an incoming message.
3483 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3484 applied a patch sanctioned by the Sieve maintainer.
3486 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3487 the uid or gid is negative. A case of a negative gid caused this to be
3488 noticed. The fix allows for either to be negative.
3490 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3491 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3494 PH/36 The change PH/12 above was broken. Fixed it.
3496 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3497 the grounds that routing the same address twice would always produce the
3498 same answer. This might have been true once, but it is certainly no
3499 longer true now. Routing a child address may depend on the previous
3500 routing that produced that child. Some complicated redirection strategies
3501 went wrong when messages had multiple recipients, and made Exim's
3502 behaviour dependent on the order in which the addresses were given.
3504 I have moved the duplicate checking until after the routing is complete.
3505 Exim scans the addresses that are assigned to local and remote
3506 transports, and removes any duplicates. This means that more work will be
3507 done, as duplicates will always all be routed, but duplicates are
3508 presumably rare, so I don't expect this is of any significance.
3510 For deliveries to pipes, files, and autoreplies, the duplicate checking
3511 still happens during the routing process, since they are not going to be
3514 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3515 It corrects a timeout issue with spamd. This is Ian's comment: "The
3516 background is that sometimes spamd either never reads data from a
3517 connection it has accepted, or it never writes response data. The exiscan
3518 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3519 blindly assumes that writes won't block so it may never time out."
3521 PH/39 Allow G after quota size as well as K and M.
3523 PH/40 The value set for $authenticated_id in an authenticator may not contain
3524 binary zeroes or newlines because the value is written to log lines and
3525 to spool files. There was no check on this. Now the value is run through
3526 the string_printing() function so that such characters are converted to
3527 printable escape sequences.
3529 PH/41 $message_linecount is a new variable that contains the total number of
3530 lines in the message. Compare $body_linecount, which is the count for the
3533 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3534 bounce and delay warning messages, except in certain special cases, which
3537 (a) An SMTP error message from a remote host;
3538 (b) A message specified in a :fail: redirection;
3539 (c) A message specified in a "fail" command in a system filter;
3540 (d) A message specified in a FAIL return from the queryprogram router;
3541 (e) A message specified by the cannot_route_message router option.
3543 In these cases only, Exim does include the error details in bounce and
3544 warning messages. There are also a few cases where bland messages such
3545 as "unrouteable address" or "local delivery error" are given.
3547 PH/43 $value is now also set for the "else" part of a ${run expansion.
3549 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3550 being worked on, but at least Exim now implements the latest version to
3553 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3554 process to complete was treated as a delivery failure, a timeout while
3555 writing the message to the pipe was logged, but erroneously treated as a
3556 successful delivery. Such timeouts include transport filter timeouts. For
3557 consistency with the overall process timeout, these timeouts are now
3558 treated as errors, giving rise to delivery failures by default. However,
3559 there is now a new Boolean option for the pipe transport called
3560 timeout_defer, which, if set TRUE, converts the failures into defers for
3561 both kinds of timeout. A transport filter timeout is now identified in
3564 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3565 systems where "make" and "gmake" are different, calling "gmake" at top
3566 level broke things. I've arranged for the value of $(MAKE) to be passed
3567 from the Makefile to this script so that it can call the same version of
3571 A note about Exim versions 4.44 and 4.50
3572 ----------------------------------------
3574 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3575 changes of various kinds. As a consequence, a big documentation update was
3576 needed. This delayed the release for rather longer than seemed good, especially
3577 in the light of a couple of (minor) security issues. Therefore, the changes
3578 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3579 release. So 4.44 and 4.50 are in effect two different branches that both start
3582 I have left the 4.50 change log unchanged; it contains all the changes since
3583 4.43. The change log for 4.44 is below; many of its items are identical to
3584 those for 4.50. This seems to be the most sensible way to preserve the
3585 historical information.
3591 1. Minor wording change to the doc/README.SIEVE file.
3593 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3594 computation of the current number of files was incorrect.
3596 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3597 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3600 4. Give more explanation in the error message when the command for a transport
3601 filter fails to execute.
3603 5. There are several places where Exim runs a non-Exim command in a
3604 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3605 was being done only for the command run by the queryprogram router. It is
3606 now done for all such subprocesses. The other cases are: ${run, transport
3607 filters, and the commands run by the lmtp and pipe transports.
3609 6. Added CONFIGURE_GROUP build-time option.
3611 7. Some older OS have a limit of 256 on the maximum number of file
3612 descriptors. Exim was using setrlimit() to set 1000 as a large value
3613 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3614 systems. I've change it so that if it can't get 1000, it tries for 256.
3616 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3617 was an oversight, and furthermore, ever since the addition of extra
3618 controls (e.g. 4.43/32), the checks on when to allow different forms of
3619 "control" were broken. There should now be diagnostics for all cases when a
3620 control that does not make sense is encountered.
3622 9. Added the /retain_sender option to "control=submission".
3624 10. $recipients is now available in the predata ACL (oversight).
3626 11. Tidy the search cache before the fork to do a delivery from a message
3627 received from the command line. Otherwise the child will trigger a lookup
3628 failure and thereby defer the delivery if it tries to use (for example) a
3629 cached ldap connection that the parent has called unbind on.
3631 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3632 of $address_data from the recipient verification was clobbered by the
3633 sender verification.
3635 13. The value of address_data from a sender verification is now available in
3636 $sender_address_data in subsequent conditions in the ACL statement.
3638 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3640 15. Added a new option "connect=<time>" to callout options, to set a different
3643 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3644 was its contents. (It was OK if the option was not defined at all.)
3646 17. A "Completed" log line is now written for messages that are removed from
3647 the spool by the -Mrm option.
3649 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3650 information about exactly what failed.
3652 19. Added -dd to debug only the daemon process.
3654 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3655 handles timeouts, both on the server side and network timeouts. Renamed the
3656 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3658 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3659 It is now set to "smtps".
3661 22. $host_address is now set to the target address during the checking of
3662 ignore_target_hosts.
3664 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3665 being passed; this would have caused $sender_host_name to have been used if
3666 matching the list had actually called for a host name (not very likely,
3667 since this list is usually IP addresses). A host name is now passed as
3670 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3671 code that specifies a non-restarting handler (typically sigaction() in
3672 modern systems) in an attempt to fix a rare and obscure crash bug.
3674 25. Narrowed the window for a race in the daemon that could cause it to ignore
3675 SIGCHLD signals. This is not a major problem, because they are used only to
3676 wake it up if nothing else does.
3678 26. A malformed maildirsize file could cause Exim to calculate negative values
3679 for the mailbox size or file count. Odd effects could occur as a result.
3680 The maildirsize information is now recalculated if the size or filecount
3683 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3684 support for a long time. Removed HAVE_SYS_VFS_H.
3686 28. Installed the latest version of exipick from John Jetmore.
3688 29. In an address list, if the pattern was not a regular expression, an empty
3689 subject address (from a bounce message) matched only if the pattern was an
3690 empty string. Non-empty patterns were not even tested. This was the wrong
3691 because it is perfectly reasonable to use an empty address as part of a
3692 database query. An empty address is now tested by patterns that are
3693 lookups. However, all the other forms of pattern expect the subject to
3694 contain a local part and a domain, and therefore, for them, an empty
3695 address still always fails if the pattern is not itself empty.
3697 30. Exim went into a mad DNS loop when attempting to do a callout where the
3698 host was specified on an smtp transport, and looking it up yielded more
3699 than one IP address.
3701 31. Re-factored the code for checking spool and log partition space into a
3702 function that finds that data and another that does the check. The former
3703 is then used to implement four new variables: $spool_space, $log_space,
3704 $spool_inodes, and $log_inodes.
3706 32. The RFC2047 encoding function was originally intended for short strings
3707 such as real names; it was not keeping to the 75-character limit for
3708 encoded words that the RFC imposes. It now respects the limit, and
3709 generates multiple encoded words if necessary. To be on the safe side, I
3710 have increased the buffer size for the ${rfc2047: expansion operator from
3713 33. It is now permitted to omit both strings after an "if" condition; if the
3714 condition is true, the result is "true". As before, when the second string
3715 is omitted, a false condition yields an empty string. This makes it less
3716 cumbersome to write custom ACL and router conditions.
3718 34. Failure to deliver a bounce message always caused it to be frozen, even if
3719 there was an errors_to setting on the router. The errors_to setting is now
3722 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3723 canonical form (fully expanded) before being placed in
3724 $sender_host_address.
3726 36. The table in the code that translates DNS record types into text (T_A to
3727 "A" for instance) was missing entries for NS and CNAME. It is just possible
3728 that this could have caused confusion if both these types were looked up
3729 for the same domain, because the text type is used as part of Exim's
3730 per-process caching. But the chance of anyone hitting this buglet seems
3733 37. The dnsdb lookup has been extended in a number of ways.
3735 (1) There is a new type, "zns", which walks up the domain tree until it
3736 finds some nameserver records. It should be used with care.
3738 (2) There is a new type, "mxh", which is like "mx" except that it returns
3739 just the host names, not the priorities.
3741 (3) It is now possible to give a list of domains (or IP addresses) to be
3742 looked up. The behaviour when one of the lookups defers can be
3743 controlled by a keyword.
3745 (4) It is now possible to specify the separator character for use when
3746 multiple records are returned.
3748 38. The dnslists ACL condition has been extended: it is now possible to supply
3749 a list of IP addresses and/or domains to be looked up in a particular DNS
3752 39. Added log_selector=+queue_time_overall.
3754 40. When running the queue in the test harness, wait just a tad after forking a
3755 delivery process, to get repeatability of debugging output.
3757 41. Include certificate and key file names in error message when GnuTLS fails
3758 to set them up, because the GnuTLS error message doesn't include the name
3759 of the failing file when there is a problem reading it.
3761 42. Allow both -bf and -bF in the same test run.
3763 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3765 44. The "Exiscan patch" is now merged into the mainline Exim source.
3767 45. Sometimes the final signoff response after QUIT could fail to get
3768 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3769 < 0 before doing a fflush(). This bug looks as though it goes back to the
3770 introduction of TLS in release 3.20, but "sometimes" must have been rare
3771 because the tests only now provoked it.
3773 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3774 (this can affect the format of dates).
3776 47. exim_tidydb, when checking for the continued existence of a message for
3777 which it has found a message-specific retry record, was not finding
3778 messages that were in split spool directories. Consequently, it was
3779 deleting retry records that should have stayed in existence.
3781 48. Steve fixed some bugs in eximstats.
3783 49. The SPA authentication driver was not abandoning authentication and moving
3784 on to the next authenticator when an expansion was forced to fail,
3785 contradicting the general specification for all authenticators. Instead it
3786 was generating a temporary error. It now behaves as specified.
3788 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3789 (the order specifies the preference for clients). The order is now AES256,
3790 AES128, 3DES, ARCFOUR128.
3792 51. Small patch to Sieve code - explicitly set From: when generating an
3795 52. Exim crashed if a remote delivery caused a very long error message to be
3796 recorded - for instance if somebody sent an entire SpamAssassin report back
3797 as a large number of 550 error lines. This bug was coincidentally fixed by
3798 increasing the size of one of Exim's internal buffers (big_buffer) that
3799 happened as part of the Exiscan merge. However, to be on the safe side, I
3800 have made the code more robust (and fixed the comments that describe what
3803 53. Now that there can be additional text after "Completed" in log lines (if
3804 the queue_time_overall log selector is set), a one-byte patch to exigrep
3805 was needed to allow it to recognize "Completed" as not the last thing in
3808 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3809 patch that reportedly fixes this has been added. I am not expert enough to
3810 create a test for it. This is what the patch creator wrote:
3812 "I found a little strange behaviour of ldap code when working with
3813 Windows 2003 AD Domain, where users was placed in more than one
3814 Organization Units. When I tried to give exim partial DN, the exit code
3815 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3816 But simultaneously result of request was absolutely normal ldap result,
3817 so I produce this patch..."
3819 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3820 REFERENCE, so I have modified the code to exclude the patch when that macro
3823 55. Some experimental protocols are using DNS PTR records for new purposes. The
3824 keys for these records are domain names, not reversed IP addresses. The
3825 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3826 leaves it alone. Component reversal etc. now happens only for IP addresses.
3829 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3831 57. Double the size of the debug message buffer (to 2048) so that more of very
3832 long debug lines gets shown.
3834 58. The exicyclog utility now does better if the number of log files to keep
3835 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3837 59. Two changes related to the smtp_active_hostname option:
3839 (1) $smtp_active_hostname is now available as a variable.
3840 (2) The default for smtp_banner uses $smtp_active_hostname instead
3841 of $primary_hostname.
3843 60. The host_aton() function is supposed to be passed a string that is known
3844 to be a valid IP address. However, in the case of IPv6 addresses, it was
3845 not checking this. This is a hostage to fortune. Exim now panics and dies
3846 if the condition is not met. A case was found where this could be provoked
3847 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3848 components; fortuitously, this particular loophole had already been fixed
3849 by change 4.50/55 above.
3851 If there are any other similar loopholes, the new check in host_aton()
3852 itself should stop them being exploited. The report I received stated that
3853 data on the command line could provoke the exploit when Exim was running as
3854 exim, but did not say which command line option was involved. All I could
3855 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3856 running as the user.
3859 61. There was a buffer overflow vulnerability in the SPA authentication code
3860 (which came originally from the Samba project). I have added a test to the
3861 spa_base64_to_bits() function which I hope fixes it.
3864 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3865 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3867 63. The daemon start-up calls getloadavg() while still root for those OS that
3868 need the first call to be done as root, but it missed one case: when
3869 deliver_queue_load_max is set with deliver_drop_privilege. This is
3870 necessary for the benefit of the queue runner, because there is no re-exec
3871 when deliver_drop_privilege is set.
3873 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3874 This has been fixed.
3876 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3877 was in use, was not putting the data itself into the right store pool;
3878 consequently, it could be overwritten for a subsequent message in the same
3879 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3882 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3884 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3885 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3886 the function were treating the return as a boolean value, which happened to
3887 work because 0=false and not-0=true, but is not correct code.
3889 68. The host_aton() function was not handling scoped IPv6 addresses (those
3890 with, for example, "%eth0" on the end) correctly.
3892 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3893 negated items (that is, ~something) in unsigned ints. Some compilers
3894 apparently mutter when there is no cast.
3896 70. If an address verification called from an ACL failed, and did not produce a
3897 user-specific message (i.e. there was only a "system" message), nothing was
3898 put in $acl_verify_message. In this situation, it now puts the system
3901 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3902 session; change 4.31/43 added the unwanted input to the log line - except
3903 that it did not do this in the start of session case. It now does.
3905 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3906 This is wrong and can cause the other end to generate a synchronization
3907 error if it is another Exim or anything else that does the synchronization
3908 check. A QUIT command is no longer sent after a timeout.
3910 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3911 during host lookups.
3913 74. The defer_ok option of callout verification was not working if it was used
3914 when verifying addresses in header lines, that is, for this case:
3916 verify = header_sender/callout=defer_ok
3918 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3919 those file descriptors could be used for SMTP connections. If anything
3920 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3921 could be sent to the SMTP client, causing chaos. The daemon now opens
3922 stdin, stdout, and stderr to /dev/null when it puts itself into the
3925 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3926 log by default. The user can override this with suitable Perl magic.
3928 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3929 the log message when discard triggers, was not working for the DATA ACL or
3930 for the non-SMTP ACL.
3932 78. Error message wording change in sieve.c.
3934 79. If smtp_accept_max_per_host was set, the number of connections could be
3935 restricted to fewer than expected, because the daemon was trying to set up
3936 a new connection before checking whether the processes handling previous
3937 connections had finished. The check for completed processes is now done
3938 earlier. On busy systems, this bug wouldn't be noticed because something
3939 else would have woken the daemon, and it would have reaped the completed
3942 80. If a message was submitted locally by a user whose login name contained one
3943 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3944 It caused a spool format error. I have fixed the spool reading code. A
3945 related problem was that the "from" clause in the Received: line became
3946 illegal because of the space(s). It is now covered by ${quote_local_part.
3948 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3951 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3953 83. Patch from Sieve maintainer to fix unterminated string problem in
3954 "vacation" handling.
3956 84. Some minor changes to the Linux configuration files to help with other
3957 OS variants using glibc.
3959 85. One more patch for Sieve to update vacation handling to latest spec.
3962 ----------------------------------------------------
3963 See the note above about the 4.44 and 4.50 releases.
3964 ----------------------------------------------------
3970 1. Change 4.43/35 introduced a bug that caused file counts to be
3971 incorrectly computed when quota_filecount was set in an appendfile
3974 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3975 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3978 3. Give more explanation in the error message when the command for a transport
3979 filter fails to execute.
3981 4. There are several places where Exim runs a non-Exim command in a
3982 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3983 was being done only for the command run by the queryprogram router. It is
3984 now done for all such subprocesses. The other cases are: ${run, transport
3985 filters, and the commands run by the lmtp and pipe transports.
3987 5. Some older OS have a limit of 256 on the maximum number of file
3988 descriptors. Exim was using setrlimit() to set 1000 as a large value
3989 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3990 systems. I've change it so that if it can't get 1000, it tries for 256.
3992 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3993 was an oversight, and furthermore, ever since the addition of extra
3994 controls (e.g. 4.43/32), the checks on when to allow different forms of
3995 "control" were broken. There should now be diagnostics for all cases when a
3996 control that does not make sense is encountered.
3998 7. $recipients is now available in the predata ACL (oversight).
4000 8. Tidy the search cache before the fork to do a delivery from a message
4001 received from the command line. Otherwise the child will trigger a lookup
4002 failure and thereby defer the delivery if it tries to use (for example) a
4003 cached ldap connection that the parent has called unbind on.
4005 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4006 of $address_data from the recipient verification was clobbered by the
4007 sender verification.
4009 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4010 was its contents. (It was OK if the option was not defined at all.)
4012 11. A "Completed" log line is now written for messages that are removed from
4013 the spool by the -Mrm option.
4015 12. $host_address is now set to the target address during the checking of
4016 ignore_target_hosts.
4018 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4019 being passed; this would have caused $sender_host_name to have been used if
4020 matching the list had actually called for a host name (not very likely,
4021 since this list is usually IP addresses). A host name is now passed as
4024 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4025 code that specifies a non-restarting handler (typically sigaction() in
4026 modern systems) in an attempt to fix a rare and obscure crash bug.
4028 15. Narrowed the window for a race in the daemon that could cause it to ignore
4029 SIGCHLD signals. This is not a major problem, because they are used only to
4030 wake it up if nothing else does.
4032 16. A malformed maildirsize file could cause Exim to calculate negative values
4033 for the mailbox size or file count. Odd effects could occur as a result.
4034 The maildirsize information is now recalculated if the size or filecount
4037 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4038 support for a long time. Removed HAVE_SYS_VFS_H.
4040 18. Updated exipick to current release from John Jetmore.
4042 19. Allow an empty sender to be matched against a lookup in an address list.
4043 Previously the only cases considered were a regular expression, or an
4046 20. Exim went into a mad DNS lookup loop when doing a callout where the
4047 host was specified on the transport, if the DNS lookup yielded more than
4050 21. The RFC2047 encoding function was originally intended for short strings
4051 such as real names; it was not keeping to the 75-character limit for
4052 encoded words that the RFC imposes. It now respects the limit, and
4053 generates multiple encoded words if necessary. To be on the safe side, I
4054 have increased the buffer size for the ${rfc2047: expansion operator from
4057 22. Failure to deliver a bounce message always caused it to be frozen, even if
4058 there was an errors_to setting on the router. The errors_to setting is now
4061 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4062 canonical form (fully expanded) before being placed in
4063 $sender_host_address.
4065 24. Updated eximstats to version 1.33
4067 25. Include certificate and key file names in error message when GnuTLS fails
4068 to set them up, because the GnuTLS error message doesn't include the name
4069 of the failing file when there is a problem reading it.
4071 26. Expand error message when OpenSSL has problems setting up cert/key files.
4074 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4075 (this can affect the format of dates).
4077 28. exim_tidydb, when checking for the continued existence of a message for
4078 which it has found a message-specific retry record, was not finding
4079 messages that were in split spool directories. Consequently, it was
4080 deleting retry records that should have stayed in existence.
4082 29. eximstats updated to version 1.35
4083 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4084 1.35 - bugfix such that pie charts by volume are generated correctly
4086 30. The SPA authentication driver was not abandoning authentication and moving
4087 on to the next authenticator when an expansion was forced to fail,
4088 contradicting the general specification for all authenticators. Instead it
4089 was generating a temporary error. It now behaves as specified.
4091 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4092 (the order specifies the preference for clients). The order is now AES256,
4093 AES128, 3DES, ARCFOUR128.
4095 31. Small patch to Sieve code - explicitly set From: when generating an
4098 32. Exim crashed if a remote delivery caused a very long error message to be
4099 recorded - for instance if somebody sent an entire SpamAssassin report back
4100 as a large number of 550 error lines. This bug was coincidentally fixed by
4101 increasing the size of one of Exim's internal buffers (big_buffer) that
4102 happened as part of the Exiscan merge. However, to be on the safe side, I
4103 have made the code more robust (and fixed the comments that describe what
4106 33. Some experimental protocols are using DNS PTR records for new purposes. The
4107 keys for these records are domain names, not reversed IP addresses. The
4108 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4109 leaves it alone. Component reversal etc. now happens only for IP addresses.
4112 34. The host_aton() function is supposed to be passed a string that is known
4113 to be a valid IP address. However, in the case of IPv6 addresses, it was
4114 not checking this. This is a hostage to fortune. Exim now panics and dies
4115 if the condition is not met. A case was found where this could be provoked
4116 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4117 components; fortuitously, this particular loophole had already been fixed
4118 by change 4.50/55 or 4.44/33 above.
4120 If there are any other similar loopholes, the new check in host_aton()
4121 itself should stop them being exploited. The report I received stated that
4122 data on the command line could provoke the exploit when Exim was running as
4123 exim, but did not say which command line option was involved. All I could
4124 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4125 running as the user.
4128 35. There was a buffer overflow vulnerability in the SPA authentication code
4129 (which came originally from the Samba project). I have added a test to the
4130 spa_base64_to_bits() function which I hope fixes it.
4133 36. The daemon start-up calls getloadavg() while still root for those OS that
4134 need the first call to be done as root, but it missed one case: when
4135 deliver_queue_load_max is set with deliver_drop_privilege. This is
4136 necessary for the benefit of the queue runner, because there is no re-exec
4137 when deliver_drop_privilege is set.
4139 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4140 was in use, was not putting the data itself into the right store pool;
4141 consequently, it could be overwritten for a subsequent message in the same
4142 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4145 38. Sometimes the final signoff response after QUIT could fail to get
4146 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4147 < 0 before doing a fflush(). This bug looks as though it goes back to the
4148 introduction of TLS in release 3.20, but "sometimes" must have been rare
4149 because the tests only now provoked it.
4155 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4156 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4157 Now it returns an integer. A number of calls were still expecting a T/F
4158 return. Fortuitously, in all cases, the tests worked in OK situations,
4159 which is the norm. However, things would have gone wrong on any write
4160 failures on the smtp file descriptor. This function is used when sending
4161 messages over SMTP and also when doing verify callouts.
4163 2. When Exim is called to do synchronous delivery of a locally submitted
4164 message (the -odf or -odi options), it no longer closes stderr before doing
4167 3. Implemented the mua_wrapper option.
4169 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4171 5. Implemented the functions header_remove(), header_testname(),
4172 header_add_at_position(), and receive_remove_recipient(), and exported them
4175 6. If an ACL "warn" statement specified the addition of headers, Exim already
4176 inserted X-ACL-Warn: at the start if there was no header name. However, it
4177 was not making this test for the second and subsequent header lines if
4178 there were newlines in the string. This meant that an invalid header could
4179 be inserted if Exim was badly configured.
4181 7. Allow an ACL "warn" statement to add header lines at the start or after all
4182 the Received: headers, as well as at the end.
4184 8. Added the rcpt_4xx retry error code.
4186 9. Added postmaster_mailfrom=xxx to callout verification option.
4188 10. Added mailfrom=xxxx to the callout verification option, for verify=
4191 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4192 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4194 12. Inserted some casts to stop certain compilers warning when using pointer
4195 differences as field lengths or precisions in printf-type calls (mostly
4196 affecting debugging statements).
4198 13. Added optional readline() support for -be (dynamically loaded).
4200 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4201 same clock tick as a message's arrival, so that its received time was the
4202 same as the "first fail" time on the retry record, and that message
4203 remained on the queue past the ultimate address timeout, every queue runner
4204 would try a delivery (because it was past the ultimate address timeout) but
4205 after another failure, the ultimate address timeout, which should have then
4206 bounced the address, did not kick in. This was a "< instead of <=" error;
4207 in most cases the first failure would have been in the next clock tick
4208 after the received time, and all would be well.
4210 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4211 being recognized when the domain list was tested by the match_domain
4212 condition in an expansion string.
4214 16. Added the ${str2b64: operator.
4216 17. Exim was always calling setrlimit() to set a large limit for the number of
4217 processes, without checking whether the existing limit was already
4218 adequate. (It did check for the limit on file descriptors.) Furthermore,
4219 errors from getrlimit() and setrlimit() were being ignored. Now they are
4220 logged to the main and panic logs, but Exim does carry on, to try to do its
4221 job under whatever limits there are.
4223 18. Imported PCRE 5.0.
4225 19. Trivial typo in log message " temporarily refused connection" (the leading
4228 20. If the log selector return_path_on_delivery was set and an address was
4229 redirected to /dev/null, the delivery process crashed because it assumed
4230 that a return path would always be set for a "successful" delivery. In this
4231 case, the whole delivery is bypassed as an optimization, and therefore no
4234 21. Internal re-arrangement: the function for sending a challenge and reading
4235 a response while authentication was assuming a zero-terminated challenge
4236 string. It's now changed to take a pointer and a length, to allow for
4237 binary data in such strings.
4239 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4241 23. Exim was not respecting finduser_retries when seeking the login of the
4242 uid under which it was called; it was always trying 10 times. (The default
4243 setting of finduser_retries is zero.) Also, it was sleeping after the final
4244 failure, which is pointless.
4246 24. Implemented tls_on_connect_ports.
4248 25. Implemented acl_smtp_predata.
4250 26. If the domain in control=submission is set empty, Exim assumes that the
4251 authenticated id is a complete email address when it generates From: or
4252 Sender: header lines.
4254 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4255 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4256 chown and chgrp in /bin and hostname in /usr/bin.
4258 28. Exim was keeping the "process log" file open after each use, just as it
4259 does for the main log. This opens the possibility of it remaining open for
4260 long periods when the USR1 signal hits a daemon. Occasional processlog
4261 errors were reported, that could have been caused by this. Anyway, it seems
4262 much more sensible not to leave this file open at all, so that is what now
4265 29. The long-running daemon process does not normally write to the log once it
4266 has entered its main loop, and it closes the log before doing so. This is
4267 so that log files can straightforwardly be renamed and moved. However,
4268 there are a couple of unusual error situations where the daemon does write
4269 log entries, and I had neglected to close the log afterwards.
4271 30. The text of an SMTP error response that was received during a remote
4272 delivery was being truncated at 512 bytes. This is too short for some of
4273 the long messages that one sometimes sees. I've increased the limit to
4276 31. It is now possible to make retry rules that apply only when a message has a
4277 specific sender, in particular, an empty sender.
4279 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4280 it possible to be selective about when SMTP synchronization is enforced.
4282 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4284 32. Implemented hosts_connection_nolog.
4286 33. Added an ACL for QUIT.
4288 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4291 35. Added mailbox_size and mailbox_filecount to appendfile.
4293 36. Added control = no_multiline_responses to ACLs.
4295 37. There was a bug in the logic of the code that waits for the clock to tick
4296 in the case where the clock went backwards by a substantial amount such
4297 that the microsecond fraction of "now" was more than the microsecond
4298 fraction of "then" (but the whole seconds number was less).
4300 38. Added support for the libradius Radius client library this is found on
4301 FreeBSD (previously only the radiusclient library was supported).
4307 1. When certain lookups returned multiple values in the form name=value, the
4308 quoting of the values was not always being done properly. Specifically:
4309 (a) If the value started with a double quote, but contained no whitespace,
4311 (b) If the value contained whitespace other than a space character (i.e.
4312 tabs or newlines or carriage returns) it was not quoted.
4313 This fix has been applied to the mysql and pgsql lookups by writing a
4314 separate quoting function and calling it from the lookup code. The fix
4315 should probably also be applied to nisplus, ibase and oracle lookups, but
4316 since I cannot test any of those, I have not disturbed their existing code.
4318 2. A hit in the callout cache for a specific address caused a log line with no
4319 reason for rejecting RCPT. Now it says "Previous (cached) callout
4320 verification failure".
4322 3. There was an off-by-one bug in the queryprogram router. An over-long
4323 return line was truncated at 256 instead of 255 characters, thereby
4324 overflowing its buffer with the terminating zero. As well as fixing this, I
4325 have increased the buffer size to 1024 (and made a note to document this).
4327 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4328 when Exim is waiting for an SMTP response from a remote server, Exim
4329 restarts its select() call on the socket, thereby resetting its timeout.
4330 This is not a problem when such interrupts are rare. Somebody set up a cron
4331 job to run exiwhat every 2 minutes, which is less than the normal select()
4332 timeout (5 or 10 minutes). This meant that the select() timeout never
4333 kicked in because it was always reset. I have fixed this by comparing the
4334 time when an interrupt arrives with the time at the start of the first call
4335 to select(). If more time than the timeout has elapsed, the interrupt is
4336 treated as a timeout.
4338 5. Some internal re-factoring in preparation for the addition of Sieve
4339 extensions (by MH). In particular, the "personal" test is moved to a
4340 separate function, and given an option for scanning Cc: and Bcc: (which is
4341 not set for Exim filters).
4343 6. When Exim created an email address using the login of the caller as the
4344 local part (e.g. when creating a From: or Sender: header line), it was not
4345 quoting the local part when it contained special characters such as @.
4347 7. Installed new OpenBSD configuration files.
4349 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4350 try to make them clearer.
4352 9. Callout options, other than the timeout value, were being ignored when
4353 verifying sender addresses in header lines. For example, when using
4355 verify = header_sender/callout=no_cache
4357 the cache was (incorrectly) being used.
4359 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4360 only the Cygwin environment.
4362 11. When return_path_on_delivery was set as a log selector, if different remote
4363 addresses in the same message used different return paths and parallel
4364 remote delivery occurred, the wrong values would sometimes be logged.
4365 (Whenever a remote delivery process finished, the return path value from
4366 the most recently started remote delivery process was logged.)
4368 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4369 lines when AUTH and/or TLS are in use. This is the "received protocol"
4370 field. Exim used to use "asmtp" for authenticated SMTP, without any
4371 indication (in the protocol name) for TLS use. Now it follows the RFC and
4372 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4373 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4374 names appear in log lines as well as in Received: header lines.
4376 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4377 extensions, and comparison tests, and to fix some bugs.
4379 14. Changes to the "personal" filter test:
4381 (1) The test was buggy in that it was just doing the equivalent of
4382 "contains" tests on header lines. For example, if a user's address was
4383 anne@some.where, the "personal" test would incorrectly be true for
4385 To: susanne@some.where
4387 This test is now done by extracting each address from the header in turn,
4388 and checking the entire address. Other tests that are part of "personal"
4389 are now done using regular expressions (for example, to check local parts
4390 of addresses in From: header lines).
4392 (2) The list of non-personal local parts in From: addresses has been
4393 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4394 taken from the Sieve specification recommendations.
4396 (3) If the message contains any header line starting with "List-" it is
4397 treated as non-personal.
4399 (4) The test for "circular" in the Subject: header line has been removed
4400 because it now seems ill-conceived.
4402 15. Minor typos in src/EDITME comments corrected.
4404 16. Installed latest exipick from John Jetmore.
4406 17. If headers_add on a router specified a text string that was too long for
4407 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4408 of string_sprintf() is now avoided.
4410 18. $message_body_size was not set (it was always zero) when running the DATA
4411 ACL and the local_scan() function.
4413 19. For the "mail" command in an Exim filter, no default was being set for
4414 the once_repeat time, causing a random time value to be used if "once" was
4415 specified. (If the value happened to be <= 0, no repeat happened.) The
4416 default is now 0s, meaning "never repeat". The "vacation" command was OK
4417 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4418 (I found it when inspecting the code).
4420 20. There is now an overall timeout for performing a callout verification. It
4421 defaults to 4 times the callout timeout, which applies to individual SMTP
4422 commands during the callout. The overall timeout applies when there is more
4423 than one host that can be tried. The timeout is checked before trying the
4424 next host. This prevents very long delays if there are a large number of
4425 hosts and all are timing out (e.g. when the network connections are timing
4426 out). The value of the overall timeout can be changed by specifying an
4427 additional sub-option for "callout", called "maxwait". For example:
4429 verify = sender/callout=5s,maxwait=20s
4431 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4432 to the end before writing, but this should make it even safer).
4434 22. Exim was forgetting that it had advertised PIPELINING for the second and
4435 subsequent messages on an SMTP connection. It was also not resetting its
4436 memory on STARTTLS and an internal HELO.
4438 23. When Exim logs an SMTP synchronization error within a session, it now
4439 records whether PIPELINING has been advertised or not.
4441 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4442 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4443 rather than long int.
4445 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4447 26. Added the never_mail option to autoreply.
4453 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4454 crash if the getsockname() call failed; this can happen if a connection is
4455 closed very soon after it is established. The problem was simply in the
4456 order in which certain operations were done, causing Exim to try to write
4457 to the SMTP stream before it had set up the file descriptor. The bug has
4458 been fixed by making things happen in the correct order.
4464 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4465 before the connection was closed, thus losing the rejection response.
4467 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4468 some early Solaris releases, but causes trouble in current releases where
4469 socklen_t is defined.
4471 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4474 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4477 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4478 that releasing the top of it at the end releases what was used for sub-
4479 expansions (unless the block got too big). However, discard this block if
4480 the first thing is a variable or header, so that we can use its block when
4481 it is dynamic (useful for very large $message_headers, for example).
4483 6. Lookups now cache *every* query, not just the most recent. A new, separate
4484 store pool is used for this. It can be recovered when all lookup caches are
4485 flushed. Lookups now release memory at the end of their result strings.
4486 This has involved some general refactoring of the lookup sources.
4488 7. Some code has been added to the store_xxx() functions to reduce the amount
4489 of flapping under certain conditions.
4491 8. log_incoming_interface used to affect only the <= reception log lines. Now
4492 it causes the local interface and port to be added to several more SMTP log
4493 lines, for example "SMTP connection from", and rejection lines.
4495 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4497 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4499 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4500 could be overwritten at the end of the current message (or the start of a
4501 new message if it was set in a HELO ACL). The value is now preserved for
4502 the duration of the SMTP connection.
4504 12. If a transport had a headers_rewrite setting, and a matching header line
4505 contained an unqualified address, that address was qualified, even if it
4506 did not match any rewriting rules. The underlying bug was that the values
4507 of the flags that permit the existence of unqualified sender and recipient
4508 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4509 non-local messages, and by -bnq for local messages) were not being
4510 preserved with the message after it was received.
4512 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4513 "next input=" as part of the text comprising the host identity instead of
4514 the correct text. The code was using the same buffer for two different
4515 strings. However, depending on which order the printing function evaluated
4516 its arguments, the bug did not always show up. Under Linux, for example, my
4517 test suite worked just fine.
4519 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4520 doesn't work with some older versions of Perl. It has been changed to "my",
4521 which in any case is probably the better facility to use.
4523 15. A really picky compiler found some instances of statements for creating
4524 error messages that either had too many or two few arguments for the format
4527 16. The size of the buffer for calls to the DNS resolver has been increased
4528 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4529 for addresses that have a lot of PTR records. This alleviates a problem; it
4530 does not fully solve it.
4532 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4533 buffer now truncates the list and logs the incident, which is the same
4534 action as happens when Exim is looking up a host name and its aliases.
4535 Previously in this situation something unpredictable would happen;
4536 sometimes it was "internal error: store_reset failed".
4538 18. If a server dropped the connection unexpectedly when an Exim client was
4539 using GnuTLS and trying to read a response, the client delivery process
4540 crashed while trying to generate an error log message.
4542 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4543 string, for example:
4545 warn message = H1: something\nH2: something
4547 the text was added as a single header line from Exim's point of view
4548 though it ended up OK in the delivered message. However, searching for the
4549 second and subsequent header lines using $h_h2: did not work. This has been
4550 fixed. Similarly, if a system filter added multiple headers in this way,
4551 the routers could not see them.
4553 20. Expanded the error message when iplsearch is called with an invalid key to
4554 suggest using net-iplsearch in a host list.
4556 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4557 ACLs are no longer actually imposed (and a message to that effect is
4560 22. If a "gecos" field in a passwd entry contained escaped characters, in
4561 particular, if it contained a \" sequence, Exim got it wrong when building
4562 a From: or a Sender: header from that name. A second bug also caused
4563 incorrect handling when an unquoted " was present following a character
4564 that needed quoting.
4566 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4567 was not being matched caselessly.
4569 24. Arranged for all hyphens in the exim.8 source to be escaped with
4572 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4573 properly. Recipient callout cache records were still being keyed to include
4574 the sender, even when use_sender was set false. This led to far more
4575 callouts that were necessary. The sender is no longer included in the key
4576 when use_sender is false.
4578 26. Added "control = submission" modifier to ACLs.
4580 27. Added the ${base62d: operator to decode base 62 numbers.
4582 28. dnsdb lookups can now access SRV records.
4584 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4585 the configuration file.
4587 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4588 (-v) mode. This makes the output for a verbose queue run more intelligible.
4590 31. Added a use_postmaster feature to recipient callouts.
4592 32. Added the $body_zerocount variable, containing the number of binary zero
4593 bytes in the message body.
4595 33. The time of last modification of the "new" subdirectory is now used as the
4596 "mailbox time last read" when there is a quota error for a maildir
4599 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4601 35. Added +ignore_unknown as a special item in host lists.
4603 36. Code for decoding IPv6 addresses in host lists is now included, even if
4604 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4605 address was recognized as an IP address, but was then not correctly decoded
4606 into binary, causing unexpected and incorrect effects when compared with
4613 1. Very minor rewording of debugging text in manualroute to say "list of
4614 hosts" instead of "hostlist".
4616 2. If verify=header_syntax was set, and a header line with an unqualified
4617 address (no domain) and a large number of spaces between the end of the
4618 name and the colon was received, the reception process suffered a buffer
4619 overflow, and (when I tested it) crashed. This was caused by some obsolete
4620 code that should have been removed. The fix is to remove it!
4622 3. When running in the test harness, delay a bit after writing a bounce
4623 message to get a bit more predictability in the log output.
4625 4. Added a call to search_tidyup() just before forking a reception process. In
4626 theory, someone could use a lookup in the expansion of smtp_accept_max_
4627 per_host which, without the tidyup, could leave open a database connection.
4629 5. Added the variables $recipient_data and $sender_data which get set from a
4630 lookup success in an ACL "recipients" or "senders" condition, or a router
4631 "senders" option, similar to $domain_data and $local_part_data.
4633 6. Moved the writing of debug_print from before to after the "senders" test
4636 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4637 problems for message scanning, either using a data ACL, or using
4638 local_scan() because the Received: header was not generated till after they
4639 were called (in order to set the time as the time of reception completion).
4640 I have revised the way this works. The header is now generated after the
4641 body is received, but before the ACL or local_scan() are called. After they
4642 are run, the timestamp in the header is updated.
4648 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4649 before starting a queue runner without re-exec. This happened only when
4650 deliver_drop_privilege was set or when the Exim user was set to root. The
4651 effect of the bug was that timeouts during subsequent deliveries caused
4652 crashes instead of being properly handled. The handler is now left at its
4653 default (and expected) setting.
4655 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4656 message, again when deliver_drop_privilege is set or Exim is run as root.
4657 The bug described in (1) was not present in this case, but the tidying up
4658 of the other signals was missing. I have made the two cases consistent.
4660 3. The ignore_target_hosts setting on a manualroute router was being ignored
4661 for hosts that were looked up using the /MX notation.
4663 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4666 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4667 operated on the sender address. After changing the $sender_address to <>
4668 for the sender address verify, Exim was re-instated it as the original
4669 (before rewriting) address, but remembering that it had rewritten it, so it
4670 wasn't rewriting it again. This bug also had the effect of breaking the
4671 sender address verification caching when the sender address was rewritten.
4673 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4674 This has been changed so that if the ip literal address matches
4675 ignore_target_hosts, the router declines.
4677 7. Added expansion conditions match_domain, match_address, and match_local_
4678 part (NOT match_host).
4680 8. The placeholder for the Received: header didn't have a length field set.
4682 9. Added code to Exim itself and to exim_lock to test for a specific race
4683 condition that could lead to file corruption when using MBX delivery. The
4684 issue is with the lockfile that is created in /tmp. If this file is removed
4685 after a process has opened it but before that process has acquired a lock,
4686 there is the potential for a second process to recreate the file and also
4687 acquire a lock. This could lead to two Exim processes writing to the file
4688 at the same time. The added code performs the same test as UW imapd; it
4689 checks after acquiring the lock that its file descriptor still refers to
4690 the same named file.
4692 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4693 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4696 11. Added the smtp_active_hostname option. If used, this will typically be made
4697 to depend on the incoming interface address. Because $interface_address is
4698 not set up until the daemon has forked a reception process, error responses
4699 that can happen earlier (such as "too many connections") no longer contain
4702 12. If an expansion in a condition on a "warn" statement fails because a lookup
4703 defers, the "warn" statement is abandoned, and the next ACL statement is
4704 processed. Previously this caused the whole ACL to be aborted.
4706 13. Added the iplsearch lookup type.
4708 14. Added ident_timeout as a log selector.
4710 15. Added tls_certificate_verified as a log selector.
4712 16. Added a global option tls_require_ciphers (compare the smtp transport
4713 option of the same name). This controls incoming TLS connections.
4715 17. I finally figured out how to make tls_require_ciphers do a similar thing
4716 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4717 before starting the TLS session.
4719 18. Tabs are now shown as \t in -bP output.
4721 19. If the log selector return_path_on_delivery was set, Exim crashed when
4722 bouncing a message because it had too many Received: header lines.
4724 20. If two routers both had headers_remove settings, and the first one included
4725 a superfluous trailing colon, the final name in the first list and the
4726 first name in the second list were incorrectly joined into one item (with a
4727 colon in the middle).
4733 1. Added -C and -D options to the exinext utility, mainly to make it easier
4734 to include in the automated testing, but these could be helpful when
4735 multiple configurations are in use.
4737 2. The exinext utility was not formatting the output nicely when there was
4738 an alternate port involved in the retry record key, nor when there was a
4739 message id as well (for retries that were specific to a specific message
4740 and a specific host). It was also confused by IPv6 addresses, because of
4741 the additional colons they contain. I have fixed the IPv4 problem, and
4742 patched it up to do a reasonable job for IPv6.
4744 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4745 delivery, the log line now contains "pipelined" if PIPELINING was used.
4747 4. An SMTP transport process used to panic and die if the bind() call to set
4748 an explicit outgoing interface failed. This has been changed; it is now
4749 treated in the same way as a connect() failure.
4751 5. A reference to $sender_host_name in the part of a conditional expansion
4752 that was being skipped was still causing a DNS lookup. This no longer
4755 6. The def: expansion condition was not recognizing references to header lines
4756 that used bh_ and bheader_.
4758 7. Added the _cache feature to named lists.
4760 8. The code for checking quota_filecount in the appendfile transport was
4761 allowing one more file than it should have been.
4763 9. For compatibility with Sendmail, the command line option
4771 and sets the incoming protocol and host name (for trusted callers). The
4772 host name and its colon can be omitted when only the protocol is to be set.
4773 Note the Exim already has two private options, -pd and -ps, that refer to
4774 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4775 "s", but I don't think that's a major issue.
4777 10. A number of refactoring changes to the code, none of which should affect
4780 (a) The number of logging options was getting close to filling up the
4781 32-bit word that was used as a bit map. I have split them into two classes:
4782 those that are passed in the argument to log_write(), and those that are
4783 only ever tested independently outside of that function. These are now in
4784 separate 32-bit words, so there is plenty of room for expansion again.
4785 There is no change in the user interface or the logging behaviour.
4787 (b) When building, for example, log lines, the code previously used a
4788 macro that called string_cat() twice, in order to add two strings. This is
4789 not really sufficiently general. Furthermore, there was one instance where
4790 it was actually wrong because one of the argument was used twice, and in
4791 one call a function was used. (As it happened, calling the function twice
4792 did not affect the overall behaviour.) The macro has been replaced by a
4793 function that can join an arbitrary number of extra strings onto a growing
4796 (c) The code for expansion conditions now uses a table and a binary chop
4797 instead of a serial search (which was left over from when there were very
4798 few conditions). Also, it now recognizes conditions like "pam" even when
4799 the relevant support is not compiled in: a suitably worded error message is
4800 given if an attempt is made to use such a condition.
4802 11. Added ${time_interval:xxxxx}.
4804 12. A bug was causing one of the ddress fields not to be passed back correctly
4805 from remote delivery subprocesses. The field in question was not being
4806 subsequently used, so this caused to problems in practice.
4808 13. Added new log selectors queue_time and deliver_time.
4810 14. Might have fixed a bug in maildirsizefile handling that threw up
4811 "unexpected character" debug warnings, and recalculated the data
4812 unnecessarily. In any case, I expanded the warning message to give more
4815 15. Added the message "Restricted characters in address" to the statements in
4816 the default ACL that block characters like @ and % in local parts.
4818 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4819 Three changes have been made:
4821 (a) There was a serious bug; a negative response to MAIL caused the whole
4822 recipient domain to be cached as invalid, thereby blocking all messages
4823 to all local parts at the same domain, from all senders. This bug has
4824 been fixed. The domain is no longer cached after a negative response to
4825 MAIL if the sender used is not empty.
4827 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4830 (c) A new callout option, "use_sender" has been added for people who want
4831 the modified behaviour.
4837 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4840 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4841 indeed breaks things for older releases.
4843 3. Added additional logging to the case where there is a problem reading data
4844 from a filter that is running in a subprocess using a pipe, in order to
4845 try to track down a specific problem.
4847 4. Testing facility fudge: when running in the test harness and attempting
4848 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4849 getting "No route to host". Convert this to a timeout.
4851 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4854 6. Some OS don't have socklen_t but use size_t instead. This affects the
4855 fifth argument of getsockopt() amongst other things. This is now
4856 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4857 can be set for individual OS. I have set it for SunOS5, OSF1, and
4858 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4859 some earlier ones do not.
4861 7. Change 4.30/15 was not doing the test caselessly.
4863 8. The standard form for an IPv6 address literal was being rejected by address
4864 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4865 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4866 this, as well as the form without the "IPv6" on the front (but only when
4867 address literals are enabled, of course).
4869 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4871 10. Exim crashed if a message with an empty sender address specified by -f
4872 encountered a router with an errors_to setting. This could be provoked only
4873 by a command such as
4877 where an empty string was supplied; "<>" did not hit this bug.
4879 11. Installed PCRE release 4.5.
4881 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4882 remained set. It is now erased.
4884 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4885 times from message ids (which are base 36 rather than the normal 62).
4887 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4888 were being counted as actual protocol errors, and logged if the log
4889 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4890 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4891 and DATA following a set of rejected RCPTs do not count as protocol errors.
4892 In other words, Exim assumes they were pipelined, though this may not
4893 actually be the case. Of course, in all cases the client gets an
4894 appropriate error code.
4896 15. If a lookup fails in an ACL condition, a message about the failure may
4897 be available; it is used if testing the ACL cannot continue, because most
4898 such messages specify what the cause of the deferral is. However, some
4899 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4900 that caused an old message to be retained and used if a later statement
4901 caused a defer, replacing the real cause of the deferral.
4903 16. If an IP address had so many PTR records that the DNS lookup buffer
4904 was not large enough to hold them, Exim could crash while trying to process
4905 the truncated data. It now detects and logs this case.
4907 17. Further to 4.21/58, another change has been made: if (and only if) the
4908 first line of a message (the first header line) ends with CRLF, a bare LF
4909 in a subsequent header line has a space inserted after it, so as not to
4910 terminate the header.
4912 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4913 unnecessarily, used atoi() instead of strtol(), and didn't check the
4914 termination when getting file sizes from file names by regex.
4916 19. Completely re-implemented the support for maildirsize files, in the light
4917 of a number of problems with the previous contributed implementation
4918 (4.30/29). In particular:
4920 . If the quota is zero, the maildirsize file is maintained, but no quota is
4923 . If the maildir directory does not exist, it is created before any attempt
4924 to write a maildirsize file.
4926 . The quota value in the file is just a cache; if the quota is changed in
4927 the transport, the new value overrides.
4929 . A regular expression is available for excluding directories from the
4932 20. The autoreply transport checks the characters in options that define the
4933 message's headers; it allows continued headers, but it was checking with
4934 isspace() after an embedded newline instead of explicitly looking for a
4937 21. If all the "regular" hosts to which an address was routed had passed their
4938 expiry times, and had not reached their retry times, the address was
4939 bounced, even if fallback hosts were defined. Now Exim should go on to try
4942 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4943 equivalent code in the SMTP transport. Some hosts send humungous responses
4944 to HELO/EHLO, more than 1024 it seems.
4946 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4947 gives compiler warnings in some environments. I've now done it "properly",
4950 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4951 (because of problems with the built-in one) was declared to return uschar *
4952 instead of char *, causing compiler failure.
4954 25. Fixed a file descriptor leak when processing alias/forward files.
4956 26. Fixed a minor format string issue in dbfn.c.
4958 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4960 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4961 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4964 29. When a sender address is verified, it is cached, to save repeating the test
4965 when there is more than one recipient in a message. However, when the
4966 verification involves a callout, it is possible for different callout
4967 options to be set for different recipients. It is too complicated to keep
4968 track of this in the cache, so now Exim always runs a verification when a
4969 callout is required, relying on the callout cache for the optimization.
4970 The overhead is duplication of the address routing, but this should not be
4973 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4974 to be verified with callout=postmaster, and the main callout worked but the
4975 postmaster check failed, the verification correctly failed. However, if a
4976 subsequent RCPT command asked for sender verification *without* the
4977 postmaster check, incorrect caching caused this verification also to fail,
4980 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4981 it was not caching the DNS options (qualify_single, search_parents) that
4982 were used when the lookup failed. A subsequent lookup with different
4983 options therefore always gave the same answer, though there were cases
4984 where it should not have. (Example: a "domains = !$mx_any" option on a
4985 dnslookup router: the "domains" option is always processed without any
4986 widening, but the router might have qualify_single set.) Now Exim uses the
4987 cached value only when the same options are set.
4989 32. Added John Jetmore's "exipick" utility to the distribution.
4991 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4992 than a timeout (e.g. a certificate is required, and is not provided), an
4993 Exim server now closes the connection immediately. Previously it waited for
4994 the client to close - but if the client is SSL, it seems that they each
4995 wait for each other, leading to a delay before one of them times out.
4997 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4998 maintained 0.8.x compatibility because I don't think many are using it, and
4999 it is clearly obsolete.
5001 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5004 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5005 client certificate was expired. A simple patch fixes this, though I don't
5006 understand the full logic of why the verify callback is called multiple
5009 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5010 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5011 which causes problems with some clients (such as the Certicom SSL Plus
5012 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5013 disables the coutermeasure allowing Eudora to connect."
5015 38. Exim was not checking that a write() to a log file succeeded. This could
5016 lead to Bad Things if a log got too big, in particular if it hit a file
5017 size limit. Exim now panics and dies if it cannot write to a log file, just
5018 as it does if it cannot open a log file.
5020 39. Modified OS/Makefile-Linux so that it now contains
5022 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5024 The two -D definitions ensure that Exim is compiled with large file
5025 support, which makes it possible to handle log files that are bigger than
5028 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5029 instance) a domain was checked against a named list that involved a lookup,
5030 causing $domain_data to be set, then another domain was checked against the
5031 same list, then the first domain was re-checked, the value of $domain_data
5032 after the final check could be wrong. In particular, if the second check
5033 failed, it could be set empty. This bug probably also applied to
5036 41. The strip_trailing_dot option was not being applied to the address given
5037 with the -f command-line option.
5039 42. The code for reading a message's header from the spool was incrementing
5040 $received_count, but never initializing it. This meant that the value was
5041 incorrect (doubled) while delivering a message in the same process in which
5042 it was received. In the most common configuration of Exim, this never
5043 happens - a fresh exec is done - but it can happen when
5044 deliver_drop_privilege is set.
5046 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5047 it now includes up to 150 characters of the unexpected data in the log
5050 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5051 and building data strings. The size of both of these buffers was 10 000
5052 bytes - far larger than anybody would *ever* want, thought I. Needless to
5053 say, somebody hit the limit. I have increased the maximum line length to
5054 20 000 and the maximum data length of concatenated lines to 100 000. I have
5055 also fixed two bugs, because there was no checking on these buffers. Tsk,
5056 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5057 buffer is too small.
5059 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5060 lsearch lookups. Now it does.
5062 46. When parsing a route_list item in a manualroute router, a fixed-length
5063 buffer was used for the list of hosts. I made this 1024 bytes long,
5064 thinking that nobody would ever have a list of hosts that long. Wrong.
5065 Somebody had a whole pile of complicated expansion conditions, and the
5066 string was silently truncated, leading to an expansion error. It turns out
5067 that it is easier to change to an unlimited length (owing to other changes
5068 that have happened since this code was originally written) than to build
5069 structure for giving a limitation error. The length of the item that
5070 expands into the list of hosts is now unlimited.
5072 47. The lsearch lookup could not handle data where the length of text line was
5073 more than 4095 characters. Such lines were truncated, leading to shortened
5074 data being returned. It should now handle lines of any length.
5076 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5077 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5080 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5081 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5082 no longer happens in comment lines. A list of replacements is now placed
5083 at the head of all of the source files, except those whose only change is
5084 to replace PERL_COMMAND in the very first #! line.
5086 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5087 messages on the queue, with a bottom-up merge sort, using code contributed
5088 by Michael Haardt. This should make operations like -bp somewhat faster on
5089 large queues. It won't affect queue runners, except when queue_run_in_order
5092 51. Installed eximstats 1.31 in the distribution.
5094 52. Added support for SRV lookups to the dnslookup router.
5096 53. If an ACL referred to $message_body or $message_body_end, the value was not
5097 reset for any messages that followed in the same SMTP session.
5099 54. The store-handling optimization for building very long strings was not
5100 differentiating between the different store pools. I don't think this
5101 actually made any difference in practice, but I've tidied it.
5103 55. While running the routers to verify a sender address, $sender_address
5104 was still set to the sender address. This is wrong, because when routing to
5105 send a bounce to the sender, it would be empty. Therefore, I have changed
5106 it so that, while verifying a sender address, $sender_address is set to <>.
5107 (There is no change to what happens when verifying a recipient address.)
5109 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5110 target A or AAAA records (if not already returned) without resetting the
5111 qualify_single or search_parents options of the DNS resolver. These are
5112 inappropriate in this case because the targets of MX and SRV records must
5113 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5114 target that, when qualified, matched something in the local domain. These
5115 two options are now turned off when doing these lookups.
5117 57. It seems that at least some releases of Reiserfs (which does not have the
5118 concept of a fixed number of inodes) returns zero and not -1 for the
5119 number of available inodes. This interacted badly with check_spool_inodes,
5120 which assumed that -1 was the "no such thing" setting. What I have done is
5121 to check that the total number of inodes is greater than zero before doing
5122 the test of how many are available.
5124 58. When a "warn" ACL statement has a log_message modifier, the message is
5125 remembered, and not repeated. This is to avoid a lot of repetition when a
5126 message has many recipients that cause the same warning to be written.
5127 Howewer, Exim was preserving the list of already written lines for an
5128 entire SMTP session, which doesn't seem right. The memory is now reset if a
5129 new message is started.
5131 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5132 debugging output unless log_rewrite was also set.
5134 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5135 of (int)(handle) when we know that handle contains (void *)(-1).
5137 61. The Exim daemon panic-logs an error return when it closes the incoming
5138 connection. However "connection reset by peer" seems to be common, and
5139 isn't really an error worthy of noting specially, so that particular error
5142 62. When Exim is trying to find all the local interfaces, it used to panic and
5143 die if the ioctl to get the interface flags failed. However, it seems that
5144 on at least one OS (Solaris 9) it is possible to have an interface that is
5145 included in the list of interfaces, but for which you get a failure error
5146 for this call. This happens when the interface is not "plumbed" into a
5147 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5148 failure of the "get flags" call assumes that the interface is down.
5150 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5151 makes life easier for people who are doing arithmetic on fields extracted
5152 from dates, where you often get leading zeros that should not be
5153 interpreted as octal.
5155 64. Added qualify_domain to the redirect router, to override the global
5158 65. If a pathologically long header line contained very many addresses (the
5159 report of this problem mentioned 10 000) and each of them was rewritten,
5160 Exim could use up a very large amount of memory. (It kept on making new
5161 copies of the header line as it rewrote, and never released the old ones.)
5162 At the expense of a bit more processing, the header rewriting function has
5163 been changed so that it no longer eats memory in this way.
5165 66. The generation of the Received: header has been moved from the time that a
5166 message starts to be received, to the time that it finishes. The timestamp
5167 in the Received: header should now be very close to that of the <= log
5168 line. There are two side-effects of this change:
5170 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5171 logged header lines no longer include the local Received: line, because
5172 it has not yet been created. The same applies to a copy of the message
5173 that is returned to a non-SMTP sender when a message is rejected.
5175 (b) When a filter file is tested using -bf, no additional Received: header
5176 is added to the test message. After some thought, I decided that this
5179 This change does not affect the value of $received_for. It is still set
5180 after address rewriting, but before local_scan() is called.
5182 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5184 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5185 gave an unhelpful panic error message, and a defer error. I have managed to
5186 change this behaviour so that it now rejects any supplied certificate,
5187 which seems right, as the list of acceptable certificates is empty.
5189 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5190 gave an unhelpful defer error. I have not managed to make this reject any
5191 supplied certificates, but the error message it gives is "no certificate
5192 supplied", which is not helpful.
5194 70. exigrep's output now also includes lines that are not associated with any
5195 message, but which match the given pattern. Implemented by a patch from
5196 Martin Sluka, which also tidied up the Perl a bit.
5198 71. Recipient callout verification, like sender verification, was using <> in
5199 the MAIL FROM command. This isn't really the right thing, since the actual
5200 sender may affect whether the remote host accepts the recipient or not. I
5201 have changed it to use the actual sender in the callout; this means that
5202 the cache record is now keyed on a recipient/sender pair, not just the
5203 recipient address. There doesn't seem to be a real danger of callout loops,
5204 since a callout by the remote host to check the sender would use <>.
5205 [SEE ABOVE: changed after hitting problems.]
5207 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5208 temporary errors. However, in the case of such a code being given after
5209 the end of a data transmission (i.e. after ".") Exim was failing to write
5210 a retry record for the message. (Yes, there was some broken host that was
5211 actually sending 8xx at this point.)
5213 73. An unknown lookup type in a host list could cause Exim to panic-die when
5214 the list was checked. (An example that provoked this was putting <; in the
5215 middle of a list instead of at the start.) If this happened during a DATA
5216 ACL check, a -D file could be left lying around. This kind of configuration
5217 error no longer causes Exim to die; instead it causes a defer errror. The
5218 incident is still logged to the main and panic logs.
5220 74. Buglet left over from Exim 3 conversion. The message "too many messages
5221 in one connection" was written to the rejectlog but not the mainlog, except
5222 when address rewriting (yes!) was being logged.
5224 75. Added write_rejectlog option.
5226 76. When a system filter was run not as root (that is, when system_filter_user
5227 was set), the values of the $n variables were not being returned to the
5228 main process; thus, they were not subsequently available in the $sn
5231 77. Added +return_path_on_delivery log selector.
5233 78. A connection timeout was being treated differently from recipients deferred
5234 when testing hosts_max_try with a message that was older than the host's
5235 retry timeout. (The host should not be counted, thus allowing all hosts to
5236 be tried at least once before bouncing.) This may have been the cause of an
5237 occasionally reported bug whereby a message would remain on the queue
5238 longer than the retry timeout, but would be bounced if a delivery was
5239 forced. I say "may" because I never totally pinned down the problem;
5240 setting up timeout/retry tests is difficult. See also the next item.
5242 79. The ultimate address timeout was not being applied to errors that involved
5243 a combination of host plus message (for example, a timeout on a MAIL
5244 command). When an address resolved to a number of possible hosts, and they
5245 were not all tried for each delivery (e.g. because of hosts_max_try), a
5246 message could remain on the queue longer than the retry timeout.
5248 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5251 81. Fixed an obscure SMTP outgoing bug which required at least the following
5252 conditions: (a) there was another message waiting for the same server;
5253 (b) the server returned 5xx to all RCPT commands in the first message so
5254 that the message was not completed; (c) the server dropped the connection
5255 or gave a negative response to the RSET that Exim sends to abort the
5256 transaction. The observed case was a dropped connection after DATA that had
5257 been sent in pipelining mode. That is, the server had advertised PIPELINING
5258 but was not implementing it correctly. The effect of the bug was incorrect
5259 behaviour, such as trying another host, and this could lead to a crash.
5265 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5266 and daemon.c were passed as pointers to ints; they should have been
5267 pointers to socklen_t variables (which are typically unsigned ints).
5269 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5272 3. Fixed a really odd bug that affected only the testing scheme; patching a
5273 certain fixed string in the binary changed the value of another string that
5274 happened to be identical to the end of the original first string.
5276 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5277 name", it returns that address as the IP address. On some operating
5278 systems (e.g. Solaris), it also passes back the IP address string as the
5279 "host name". However, on others (e.g. Linux), it passes back an empty
5280 string. Exim wasn't checking for this, and was changing the host name to an
5281 empty string, assuming it had been canonicized.
5283 5. Although rare, it is permitted to have more than one PTR record for a given
5284 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5285 all the names associated with an address, because they do in Solaris.
5286 However, it seems that they do not in Linux for data that comes from the
5287 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5288 I found this out when I moved to a new Linux workstation and tried to run
5289 the Exim test suite.
5291 To get round this problem I have changed the code so that it now does its
5292 own call to the DNS to look up PTR records when searching for a host name.
5293 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5294 addresses that are only in /etc/hosts are still found.
5296 This behaviour is, however, controlled by an option called host_lookup_
5297 order, which defaults to "bydns:byaddr". If people want to use the other
5298 order, or indeed, just use one or the other means of lookup, they can
5299 specify it in this variable.
5301 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5302 some operating systems, this comes back from gethostbyaddr() as an empty
5303 string, and this is what Exim used to test for. However, it seems that in
5304 other systems, "." is yielded. Exim now tests for this case too.
5306 7. The values of check_spool_space and check_log_space are now held internally
5307 as a number of kilobytes instead of an absolute number of bytes. If a
5308 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5309 kilobyte. This means that much larger values can be stored.
5311 8. Exim monitor: an attempt to get the action menu when not actually pointing
5312 at a message produces an empty menu entitled "No message selected". This
5313 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5314 no entries in it ("Shell widget menu has zero width and/or height"). So I
5315 have added a single, blank menu entry in this case.
5317 9. Added ${quote_local_part.
5319 10. MIME decoding is now applied to the contents of Subject: header lines when
5322 11. Now that a reference to $sender_host_address automatically causes a reverse
5323 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5324 host lookup before query-style lookups in lists that might use this
5325 variable. This has therefore been abolished, and the "net-" prefix is no
5326 longer necessary for query-style lookups.
5328 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5329 have been a typo for LFLAGS, so it has been changed.
5331 13. The install script calls Exim with "-C /dev/null" in order to find the
5332 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5333 to be output. Howeve, since Exim outputs its version number before the
5334 error, it didn't break the script. It just looked ugly. I fixed this by
5335 always allowing "-C /dev/null" if the caller is root.
5337 14. Ignore overlarge ACL variable number when reading spool file - insurance
5338 against a later release with more variables having written the file.
5340 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5341 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5342 this, as well as the form without the "IPv6" on the front.
5344 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5345 OS/Makefile-Darwin file.
5347 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5348 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5350 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5351 variable. However, some OS use ints for inodes. I've added cast to long int
5352 to get rid of the compiler warning.
5354 19. I had forgotten to lock out "/../" in configuration file names when
5355 ALT_CONFIG_PREFIX was set.
5357 20. Routers used for verification do not need to specify transports. However,
5358 if such a router generated a host list, and callout was configured, Exim
5359 crashed, because it could not find a port number from the (non-existent)
5360 transport. It now assumes port 25 in this circumstance.
5362 21. Added the -t option to exigrep.
5364 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5365 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5366 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5367 them is set, LOOKUP_LSEARCH is forced.
5369 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5371 24. Added sender and host information to the "rejected by local_scan()" log
5372 line; previously there was no indication of these.
5374 25. Added .include_if_exists.
5376 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5377 Linux. It turns out that not all file systems support this. Apparently some
5378 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5379 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5380 not supported on the file descriptor, is now ignored when Exim is trying to
5381 sync a directory. This applies only to Linux.
5383 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5385 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5386 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5389 29. Added support for maildirsize files from supplied patch (modified a bit).
5391 30. The use of :fail: followed by an empty string could lead Exim to respond to
5392 sender verification failures with (e.g.):
5394 550 Verification failed for <xxx>
5395 550 Sender verify failed
5397 where the first response line was missing the '-' that indicates it is not
5398 the final line of the response.
5400 31. The loop for finding the name of the user that called Exim had a hardwired
5401 limit of 10; it now uses the value of finduser_retries, which is used for
5402 all other user lookups.
5404 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5407 33. Exim was neglecting to zero errno before one call of strtol() when
5408 expanding a string and expecting an integer value. On some systems this
5409 resulted in spurious "integer overflow" errors. Also, it was casting the
5410 result into an int without checking.
5412 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5413 did not work. The code looks as if it has *never* worked, though it appears
5414 to have been documented since at least releast 1.62. I have made it work.
5416 35. The "timeout_DNS" error in retry rules, also documented since at least
5417 1.62, also never worked. As it isn't clear exactly what this means, and
5418 clearly it isn't a major issue, I have abolished the feature by treating it
5419 as "timeout", and writing a warning to the main and panic logs.
5421 36. The display of retry rules for -brt wasn't always showing the error code
5424 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5425 timeout_connect_A, timeout_connect_MX.
5427 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5428 to the empty sender.
5430 39. The daemon was not analysing the content of -oX till after it had closed
5431 stderr and disconnected from the controlling terminal. This meant that any
5432 syntax errors were only noted on the panic log, and the return code from
5433 the command was 0. By re-arranging the code a little, I've made the
5434 decoding happen first, so such errors now appear on stderr, and the return
5435 code is 1. However, the actual setting up of the sockets still happens in
5436 the disconnected process, so errors there are still only recorded on the
5439 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5440 connections (as happens on some IP stacks) was logged at start up time as
5441 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5442 it from "IPv6 and IPv4", which means that two separate sockets are being
5445 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5446 says whether AF_INET or AF_INET6 was passed as an argument.
5448 42. Exiwhat output was messed up when time zones were included in log
5451 43. Exiwhat now gives more information about the daemon's listening ports,
5452 and whether -tls-on-connect was used.
5454 44. The "port" option of the smtp transport is now expanded.
5456 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5457 silently ignored. Now an error message is written to the main and panic
5460 46. There's a new ACL modifier called "logwrite" which writes to a log file
5461 as soon as it is encountered.
5463 47. Added $local_user_uid and $local_user_gid at routing time.
5465 48. Exim crashed when trying to verify a sender address that was being
5468 49. Exim was recognizing only a space character after ".include". It now also
5469 recognizes a tab character.
5471 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5472 extracting the relevant information from the specification. The man page no
5473 longer contains scrambled data for the -d option, and I've added a section
5474 at the front about calling Exim under different names.
5476 51. Added "extra_headers" argument to the "mail" command in filter files.
5478 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5481 53. Installed eximstats 1.29.
5483 54. Added transport_filter_timeout as a generic transport option.
5485 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5486 Cc: header lines. This was required by RFC 822, but it not required by RFC
5489 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5490 incoming messages that did not have them. Now it does so only if the
5491 message originates locally, that is, if there is no associated remote host
5492 address. When Resent- header lines are present, this applies to the Resent-
5493 lines rather than the non-Resent- lines.
5495 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5496 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5498 58. Messages for configuration errors now include the name of the main
5499 configuration file - useful now that there may be more than one file in a
5500 list (.included file names were always shown).
5502 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5503 for those rare installations that do not start the daemon as root or run it
5504 setuid root. I've cut out the call to initgroups() if the daemon is not
5507 60. The Exim user and group can now be bound into the binary as text strings
5508 that are looked up at the start of Exim's processing.
5510 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5512 62. Added $mailstore_basename variable.
5514 63. Installed patch to sieve.c from Michael Haardt.
5516 64. When Exim failed to open the panic log after failing to open the main log,
5517 the original message it was trying to log was written to stderr and debug
5518 output, but if they were not available (the usual case in production), it
5519 was lost. Now it is written to syslog before the two lines that record the
5520 failures to open the logs.
5522 65. Users' Exim filters run in subprocesses under the user's uid. It is
5523 possible for a "deliver" command or an alias in a "personal" command to
5524 provoke an address rewrite. If logging of address rewriting is configured,
5525 this fails because the process is not running as root or exim. There may be
5526 a better way of dealing with this, but for the moment (because 4.30 needs
5527 to be released), I have disabled address rewrite logging when running a
5528 filter in a non-root, non-exim process.
5534 1. The buildconfig auxiliary program wasn't quoting the value set for
5535 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5536 not defined. This bug was masked in 4.22 by the effect that was fixed in
5539 2. Some messages that were rejected after a message id was allocated were
5540 shown as "incomplete" by exigrep. It no longer does this for messages that
5541 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5543 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5544 have allow_domain_literals set, the ID did not get logged in the <= line.
5545 Domain literals are now always recognized in Message-ID: header lines.
5547 4. The first argument for a ${extract expansion item is the key name or field
5548 number. Leading and trailing spaces in this item were not being ignored,
5549 causing some misleading effects.
5551 5. When deliver_drop_privilege was set, single queue runner processes started
5552 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5553 same command in the process it spins off) were not dropping privilege.
5555 6. When the daemon running as "exim" started a queue runner, it always
5556 re-executed Exim in the spun-off process. This is a waste of effort when
5557 deliver_drop_privilege is set. The new process now just calls the
5558 queue-runner function directly.
5564 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5567 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5568 ignored. Though the use of -oP was forcing the writing of a pid file, it
5569 was always written to the default place.
5571 3. If the message "no IP address found for host xxxx" is generated during
5572 incoming verification, it is now followed by identification of the incoming
5573 connection (so you can more easily find what provoked it).
5575 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5577 5. Added some features to "harden" Exim a bit more against certain attacks:
5579 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5580 be put in Local/Makefile. This is like the never_users runtime option,
5581 but it cannot be overridden. The default setting is "root".
5583 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5584 prefix string with which any file named in a -C command line option
5587 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5588 is retained for -C and -D only if the caller of Exim is root. Without
5589 it, the exim user may also use -C and -D and retain privilege.
5591 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5592 command line option is disabled.
5594 6. Macro names set by the -D option must start with an upper case letter, just
5595 like macro names defined in the configuration file.
5597 7. Added "dereference=" facility to LDAP.
5599 8. Two instances of the typo "uknown" in the source files are fixed.
5601 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5602 the Configure-Makefile script screwed up while processing it.
5604 10. Incorporated PCRE 4.4.
5606 11. The SMTP synchronization check was not operating right at the start of an
5607 SMTP session. For example, it could not catch a HELO sent before the client
5608 waited for the greeting. There is now a check for outstanding input at the
5609 point when the greeting is written. Because of the duplex, asynchronous
5610 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5611 way, but not yet received, when the check is performed.
5613 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5614 on TCP/IP sockets, because this apparently causes some broken clients to
5617 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5618 unchanged) from the Cygwin maintainer.
5620 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5621 was supported instead of testing for mbx. Effectively a typo.
5623 15. The spa authenticator server code was not checking that the input it
5624 received was valid base64.
5626 16. The debug output line for the "set" modifier in ACLs was not showing the
5627 name of the variable that was being set.
5629 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5631 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5632 lookup on its own. Something else was needed to trigger the lookup. For
5633 example, a match in host_lookup or the need for a host name in a host list.
5634 Now, if $sender_host_name is referenced and the host name has not yet been
5635 looked up, a lookup is performed. If the lookup fails, the variable remains
5636 empty, and $host_lookup_failed is set to "1".
5638 19. Added "eqi" as a case-independent comparison operator.
5640 20. The saslauthd authentication condition could segfault if neither service
5641 nor realm was specified.
5643 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5644 error message that was logged was misleading, and incoming SMTP
5645 connections were dropped. The message is now more accurate, and temporary
5646 errors are given to SMTP connections.
5648 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5649 (except RSET) with a 421 error, until QUIT is received. However, it was
5650 failing to send a response to QUIT.
5652 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5653 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5654 ACL is now run after the helo_try_verify_hosts code.
5656 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5657 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5658 case-independent, so other case variants are also recognized). Apparently
5659 some systems use these upper case variants.
5661 25. If more than two messages were waiting for the same host, and a transport
5662 filter was specified for the transport, Exim sent two messages over the
5663 same TCP/IP connection, and then failed with "socket operation on non-
5664 socket" when it tried to send the third.
5666 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5668 27. The extern definition of crypt16() in expand.c was not being excluded when
5669 the OS had its own crypt16() function.
5671 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5672 as a preferred synonym for return_size_limit, both as an option and as an
5675 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5677 30. Changed the default configuration ACL to relax the local part checking rule
5678 for addresses that are not in any local domains. For these addresses,
5679 slashes and pipe symbols are allowed within local parts, but the sequence
5680 /../ is explicitly forbidden.
5682 31. SPA server authentication was not clearing the challenge buffer before
5685 32. log_message in a "warn" ACL statement was writing to the reject log as
5686 well as to the main log, which contradicts the documentation and doesn't
5687 seem right (because no rejection is happening). So I have stopped it.
5689 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5690 However, I am unable to do any testing of this.
5692 34. Fixed an infelicity in the appendfile transport. When checking directories
5693 for a mailbox, to see if any needed to be created, it was accidentally
5694 using path names with one or more superfluous leading slashes; tracing
5695 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5697 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5698 contents are added to the log line that is written for every discarded
5699 recipient. (Previously a log_message setting was ignored.)
5701 36. The ${quote: operator now quotes the string if it is empty.
5703 37. The install script runs exim in order to find its version number. If for
5704 some reason other than non-existence or emptiness, which it checks, it
5705 could not run './exim', it was installing it with an empty version number,
5706 i.e. as "exim-". This error state is now caught, and the installation is
5709 38. An argument was missing from the function that creates an error message
5710 when Exim fails to connect to the socket for saslauthd authentication.
5711 This could cause Exim to crash, or give a corrupted message.
5713 39. Added isip, isip4, and isip6 to ${if conditions.
5715 40. The ACL variables $acl_xx are now saved with the message, and can be
5716 accessed later in routers, transports, and filters.
5718 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5719 strings in the file are not string-expanded.
5721 42. If a MAIL command specified a SIZE value that was too large to fit into an
5722 int variable, the check against message_size_limit failed. Such values are
5723 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5724 day this will have to be increased, but I don't think I want to be around
5725 when emails are that large.
5732 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5733 iconv() is not standard in FreeBSD.
5735 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5736 IPv6 enabled. The observed symptom was a segmentation fault on return from
5737 the function os_common_find_running_interfaces() in src/os.c.
5739 3. In the check_special_case() function in daemon.c I had used "errno" as an
5740 argument name, which causes warnings on some systems. This was basically a
5741 typo, since it was named "eno" in the comments!
5743 4. The code that waits for the clock to tick (at a resolution of some fraction
5744 of a second) so as to ensure message-id uniqueness was always waiting for
5745 at least one whole tick, when it could have waited for less. [This is
5746 almost certainly not relevant at current processor speeds, where it is
5747 unlikely to ever wait at all. But we try to future-proof.]
5749 5. The function that sleeps for a time interval that includes fractions of a
5750 second contained a race. It did not block SIGALRM between setting the
5751 timer, and suspending (a couple of lines later). If the interval was short
5752 and the sigsuspend() was delayed until after it had expired, the suspension
5753 never ended. On busy systems this could lead to processes getting stuck for
5756 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5757 process, before it forks any delivery processes. The open lookup caching
5758 mechanism meant that the open file or database connection was passed into
5759 the delivery process. The problem was that delivery processes always tidy
5760 up cached lookup data. This could cause a problem for the next delivery
5761 process started by the queue runner, because the external queue runner
5762 process does not know about the closure. So the next delivery process
5763 still has data in the lookup cache. In the case of a file lookup, there was
5764 no problem because closing a file descriptor in a subprocess doesn't affect
5765 the parent. However, if the lookup was caching a connection to a database,
5766 the connection was closed, and the second delivery process was likely to
5767 see errors such as "PGSQL: query failed: server closed the connection
5768 unexpectedly". The problem has been fixed by closing all cached lookups
5769 in a queue runner before running a delivery process.
5771 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5772 seem to have the "const" qualifier which it has on other OS. I've
5775 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5776 *of the same type* (client or server) with the same public name that an
5777 error should be diagnosed.
5779 9. When Exim looked up a host name for an IP address, but failed to find the
5780 original IP address when looking up the host name (a safety check), it
5781 output the message "<ip address> does not match any IP for NULL", which was
5782 confusing, to say the least. The bug was that the host name should have
5783 appeared instead of "NULL".
5785 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5786 user that is built into the binary, and the -C or -D options is used, root
5787 privilege is dropped before the configuration file is read. In addition,
5788 logging is switched to stderr instead of the normal log files. If the
5789 configuration then re-defines the Exim user, the unprivileged environment
5790 is probably not what is expected, so Exim logs a panic warning message (but
5793 However, if deliver_drop_privilege is set, the unprivileged state may well
5794 be exactly what is intended, so the warning has been cut out in that case,
5795 and Exim is allowed to try to write to its normal log files.
5801 1. smtp_return_error_details was not giving details for temporary sender
5802 or receiver verification errors.
5804 2. Diagnose a configuration error if two authenticators have the same public
5807 3. Exim used not to create the message log file for a message until the first
5808 delivery attempt. This could be confusing when incoming messages were held
5809 for policy or load reasons. The message log file is now created at the time
5810 the message is received, and an initial "Received" line is written to it.
5812 4. The automatically generated man page for command line options had a minor
5813 bug that caused no ill effects; however, a more serious problem was that
5814 the procedure for building the man page automatically didn't always
5815 operate. Consequently, release 4.20 contains an out-of-date version. This
5816 shouldn't happen again.
5818 5. When building Exim with embedded Perl support, the script that builds the
5819 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5820 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5822 6. The freeze_tell option was not being used for messages that were frozen on
5823 arrival, either by an ACL or by local_scan().
5825 7. Added the smtp_incomplete_transaction log selector.
5827 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5828 was accepting AUTH without a new EHLO.
5830 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5831 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5834 10. Logging of TCP/IP connections (when configured) now happens in the main
5835 daemon process instead of the child process, so that the TCP/IP connection
5836 count is more accurate (but it can never be perfect).
5838 11. The use of "drop" in a nested ACL was not being handled correctly in the
5839 outer ACL. Now, if condition failure induced by the nested "drop" causes
5840 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5841 or "require"), the connection is dropped.
5843 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5844 that yield "discard" can now be used with an "accept" or a "discard" verb,
5845 but an error is generated for any others (because I can't see a useful way
5846 to define what should happen).
5848 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5849 are now processed in the same way as lines in the Exim configuration file.
5850 In particular, continuation lines are supported.
5852 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5854 15. Added -ti meaning -t -i.
5856 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5857 domains, and warn by logging if others are found.
5859 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5860 returned from GIFCONF when Exim is trying to find the list of interfaces on
5861 a host. The code in os.c has been modified to copy each ifreq to an aligned
5862 structure in all cases.
5864 Also, in some cases, the returned ifreq's were being copied to a 'struct
5865 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5866 means the last couple of bytes of an IPv6 address could be chopped if the
5867 ifreq contained only a normal sockaddr (14 bytes storage).
5869 18. Named domain lists were not supported in the hosts_treat_as_local option.
5870 An entry such as +xxxx was not recognized, and was treated as a literal
5873 19. Ensure that header lines added by a DATA ACL are included in the reject log
5874 if the ACL subsequently rejects the message.
5876 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5877 MD5 (which is deprecated).
5879 21. When testing a filter file using -bf, Exim was writing a message when it
5880 took the sender from a "From " line in the message, but it was not doing so
5881 when it took $return_path from a Return-Path: header line. It now does.
5883 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5884 with a valid header line field name (a series of printing characters
5885 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5887 23. Changed "disc" in the source to "disk" to conform to the documentation and
5888 the book and for uniformity.
5890 24. Ignore Sendmail's -Ooption=value command line item.
5892 25. When execve() failed while trying to run a command in a pipe transport,
5893 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5894 could be confused with a return value of 69 from the command itself. This
5895 has been changed to 127, the value the shell returns if it is asked to run
5896 a non-existent command. The wording for the related log line suggests a
5897 non-existent command as the problem.
5899 26. If received_header_text expands to an empty string, do not add a Received:
5900 header line to the message. (Well, it adds a token one on the spool, but
5901 marks it "old" so that it doesn't get used or transmitted.)
5903 27. Installed eximstats 1.28 (addition of -nt option).
5905 28. There was no check for failure on the call to getsockname() in the daemon
5906 code. This can fail if there is a shortage of resources on the system, with
5907 ENOMEM, for example. A temporary error is now given on failure.
5909 29. Contrary to the C standard, it seems that in some environments, the
5910 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5911 program. Exim now does this explicitly; it affects the formatting of
5912 timestamps using strftime().
5914 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5915 complaints. I've now initialized all the variables, to avoid this.
5917 32. Header lines added by a system filter were not being "seen" during
5918 transport-time rewrites.
5920 33. The info_callback() function passed to OpenSSL is set up with type void
5921 (*)(SSL *, int, int), as described somewhere. However, when calling the
5922 function (actually a macro) that sets it up, the type void(*)() is
5923 expected. I've put in a cast to prevent warnings from picky compilers.
5925 34. If a DNS black list lookup found a CNAME record, but there were no A
5926 records associated with the domain it pointed at, Exim crashed.
5928 35. If a DNS black list lookup returned more than one A record, Exim ignored
5929 all but the first. It now scans all returned addresses if a particular IP
5930 value is being sought. In this situation, the contents of the
5931 $dnslist_value variable are a list of all the addresses, separated by a
5934 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5935 to accept a host name and all its aliases if the forward lookup for any of
5936 them yielded the IP address of the incoming connection. Now it accepts only
5937 those names whose forward lookup yields the correct IP address. Any other
5938 names are discarded. This closes a loophole whereby a rogue DNS
5939 administrator could create reverse DNS records to break through a
5940 wildcarded host restriction in an ACL.
5942 37. If a user filter or a system filter that ran in a subprocess used any of
5943 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5944 the wrong values were passed to the pipe command ($thisaddress had the
5945 value of $0, $0 had the value of $1, etc). This bug was introduced by
5946 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5948 38. Improved the line breaking for long SMTP error messages from ACLs.
5949 Previously, if there was no break point between 40 and 75 characters, Exim
5950 left the rest of the message alone. Two changes have been made: (a) I've
5951 reduced the minimum length to 35 characters; (b) if it can't find a break
5952 point between 35 and 75 characters, it looks ahead and uses the first one
5953 that it finds. This may give the occasional overlong line, but at least the
5954 remaining text gets split now.
5956 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5957 file descriptors might be low, and that setting 1000 would always raise it.
5958 It turns out that in some environments, the limit is already over 1000 and
5959 that lowering it causes trouble. So now Exim takes care not to decrease it.
5961 40. When delivering a message, the value of $return_path is set to $sender_
5962 address at the start of routing (routers may change the value). By an
5963 oversight, this default was not being set up when an address was tested by
5964 -bt or -bv, which affected the outcome if any router or filter referred to
5967 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5968 log only when "message" or "log_message" are set. However, if one of the
5969 conditions was an address verification, or a call to a nested ACL, the
5970 messages generated by the underlying test were being passed through. This
5971 no longer happens. The underlying message is available in $acl_verify_
5972 message for both "message" and "log_message" expansions, so it can be
5973 passed through if needed.
5975 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5976 new expansion $bh_ to give the encoded byte string without charset
5977 translation. Translation happens only if iconv() is available; HAVE_ICONV
5978 indicates this at build time. HEADERS_CHARSET gives the charset to
5979 translate to; headers_charset can change it in the configuration, and
5980 "headers charset" can change it in an individual filter file.
5982 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5983 that creates RFC 2047 encoded "words" labels them as that charset instead
5984 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5985 expansion operator; (ii) when Exim creates a From: line for a local
5986 message; (iii) when a header line is rewritten to include a "phrase" part.
5988 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5989 buggy, causing it to skip the first lines of messages whose message ID
5990 ended in 'D'. This would not have bitten before Exim release 4.14, because
5991 message IDs were unlikely to end in 'D' before then. The effect was to have
5992 incorrect size information for certain domains.
5994 45. #include "config.h" was missing at the start of the crypt16.c module. This
5995 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5998 46. If there was a timeout during a "random" callout check, Exim treated it as
5999 a failure of the random address, and carried on sending RSET and the real
6000 address. If the delay was just some slowness somewhere, the response to the
6001 original RCPT would be taken as a response to RSET and so on, causing
6002 mayhem of various kinds.
6004 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6005 when I implemented it. It didn't allow for the fact that some option values
6006 may legitimatetly be negative (e.g. size_addition), and it didn't even do
6007 the right test for positive values.
6009 48. Domain names in DNS records are case-independent. Exim always looks them up
6010 in lower case. Some resolvers return domain names in exactly the case they
6011 appear in the zone file, that is, they may contain uppercase letters. Not
6012 all resolvers do this - some return always lower case. Exim was treating a
6013 change of case by a resolver as a change of domain, similar to a widening
6014 of a domain abbreviation. This triggered its re-routing code and so it was
6015 trying to route what was effectively the same domain again. This normally
6016 caused routing to fail (because the router wouldn't handle the domain
6017 twice). Now Exim checks for this case specially, and just changes the
6018 casing of the domain that it ultimately uses when it transmits the message
6021 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6024 50. If a filter generated a file delivery with a non-absolute name (possible if
6025 no home directory exists for the router), the forbid_file option was not
6028 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6029 the existing equality matching.
6031 52. Exim was using ints instead of ino_t variables in some places where it was
6032 dealing with inode numbers.
6034 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6035 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6036 called TMPDIR, and if it finds it is different, it changes its value.
6038 54. The smtp_printf() function is now made available to local_scan() so
6039 additional output lines can be written before returning. There is also an
6040 smtp_fflush() function to enable the detection of a dropped connection.
6041 The variables smtp_input and smtp_batched_input are exported to
6044 55. Changed the default runtime configuration: the message "Unknown user"
6045 has been removed from the ACL, and instead placed on the localuser router,
6046 using the cannot_route_message feature. This means that any verification
6047 failures that generate their own messages won't get overridden. Similarly,
6048 the "Unrouteable address" message that was in the ACL for unverifiable
6049 relay addresses has also been removed.
6051 56. Added hosts_avoid_esmtp to the smtp transport.
6053 57. The exicyclog script was not checking for the esoteric option
6054 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6055 will work only if exicyclog is run under the appropriate euid.
6057 58. Following a discussion on the list, the rules by which Exim recognises line
6058 endings on incoming messages have been changed. The -dropcr and drop_cr
6059 options are now no-ops, retained only for backwards compatibility. The
6060 following line terminators are recognized: LF CRLF CR. However, special
6061 processing applies to CR:
6063 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6064 nor a local message in the state where . is a terminator.
6066 (ii) If a bare CR is encountered in a header line, an extra space is added
6067 after the line terminator so as not to end the header. The reasoning
6068 behind this is that bare CRs in header lines are most likely either
6069 to be mistakes, or people trying to play silly games.
6071 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6072 was being incorrectly given as 18 bytes larger than it should have been.
6073 This is a VOB (very old bug).
6075 60. This may never have affected anything current, but just in case it has:
6076 When the local host is found other than at the start of a list of hosts,
6077 the local host, those with the same MX, and any that follow, are discarded.
6078 When the list in question was part of a longer list of hosts, the following
6079 hosts (not currently being processed) were also being discarded. This no
6080 longer happens. I'm not sure if this situation could ever has previously
6083 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6086 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6087 header. This is something that is recommended in a new Internet Draft, and
6088 is something that is documented as being done by Sendmail. There are two
6089 possible values. For messages generated by the autoreply transport, Exim
6092 Auto-Submitted: auto-replied
6094 whereas for all other generated messages (e.g. bounces) it adds
6096 Auto-Submitted: auto-generated
6098 63. The "personal" condition in filters now includes a test for the
6099 Auto-Submitted: header. If it contains the string "auto-" the message it
6100 not considered personal.
6102 64. Added rcpt_include_affixes as a generic transport option.
6104 65. Added queue_only_override (default true).
6106 66. Added the syslog_duplication option.
6108 67. If what should have been the first header line of a message consisted of
6109 a space followed by a colon, Exim was mis-interpreting it as a header line.
6110 It isn't of course - it is syntactically invalid and should therefore be
6111 treated as the start of the message body. The misbehaviour could have
6112 caused a number of strange effects, including loss of data in subsequent
6113 header lines, and spool format errors.
6115 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6116 client host had authenticated. This control can now be exercised by an ACL
6117 for more flexibility.
6119 69. By default, callouts do not happen when testing with -bh. There is now a
6120 variant, -bhc, which does actually run the callout code, including
6121 consulting and updating the callout cache.
6123 70. Added support for saslauthd authentication, courtesy of Alexander
6126 71. If statvfs() failed on the spool or log directories while checking their
6127 size for availability, Exim confusingly gave the error "space shortage".
6128 Furthermore, in debugging mode it crashed with a floating point exception.
6129 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6130 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6131 serious problem, Exim now writes to the main and panic logs when this
6132 happens, with details of the failure. It then refuses to accept the
6133 incoming message, giving the message "spool directory problem" or "log
6134 directory problem" with a 421 code for SMTP messages.
6136 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6137 0, 1, and 2 exist, because some OS complain for execs without them (see
6138 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6139 descriptors. However, the code omitted to check that the open succeeded,
6140 causing mysterious errors if for some reason the permissions on /dev/null
6141 got screwed. Now Exim writes a message to the main and panic logs, and
6142 bombs out if it can't open /dev/null.
6144 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6145 interact so that it is all more flexible. It is supposed to remain
6146 backwards compatible. Also added extra_local_interfaces.
6148 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6149 to bomb out with an assertion failure - to the client this appears as a
6150 connection drop. This problem occurs in the part of the code that was taken
6151 from the Samba project. Fortunately, the assertion is in a very simple
6152 function, so I have fixed this by reproducing the function inline in the
6153 one place where it is called, and arranging for authentication to fail
6154 instead of killing the process with assert().
6156 75. The SPA client code was not working when the server requested OEM rather
6157 than Unicode encoding.
6159 76. Added code to make require_files with a specific uid setting more usable in
6160 the case where statting the file as root fails - usually a non-root-mounted
6161 NFS file system. When this happens and the failure is EACCES, Exim now
6162 forks a subprocess and does the per-uid checking as the relevant uid.
6164 77. Added process_log_path.
6166 78. If log_file_path was not explicitly set, a setting of check_log_space or
6167 check_log_inodes was ignored.
6169 79. If a space check for the spool or log partitions fails, the incident is now
6170 logged. Of course, in the latter case the data may get lost...
6172 80. Added the %p formatting code to string_format() so that it can be used to
6173 print addresses in debug_print(). Adjusted all the address printing in the
6174 debugging in store.c to use %p rather than %d.
6176 81. There was a concern that a line of code in smtp_in.c could overflow a
6177 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6178 initially expressed, the concern was not well-founded, because trailing
6179 spaces are removed early. However, if the trailing spaces were followed by
6180 a NULL, they did not get removed, so the overflow was possible. Two fixes
6183 (a) I re-wrote the offending code in a cleaner fashion.
6184 (b) If an incoming SMTP command contains a NULL character, it is rejected
6187 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6188 runs initgroups(), so that if the Exim user is in any additional groups,
6189 they will be used during message reception.
6195 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob