1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
10 JH/02 The smtp transport option "multi_domain" is now expanded.
12 JH/03 The smtp transport now requests PRDR by default, if the server offers
15 JH/04 Certificate name checking on server certificates, when exim is a client,
16 is now done by default. The transport option tls_verify_cert_hostname
17 can be used to disable this per-host. The build option
18 EXPERIMENTAL_CERTNAMES is withdrawn.
20 JH/05 The value of the tls_verify_certificates smtp transport and main options
21 default to the word "system" to access the system default CA bundle.
22 For GnuTLS, only version 3.0.20 or later.
27 TL/01 When running the test suite, the README says that variables such as
28 no_msglog_check are global and can be placed anywhere in a specific
29 test's script, however it was observed that placement needed to be near
30 the beginning for it to behave that way. Changed the runtest perl
31 script to read through the entire script once to detect and set these
32 variables, reset to the beginning of the script, and then run through
33 the script parsing/test process like normal.
35 TL/02 The BSD's have an arc4random API. One of the functions to induce
36 adding randomness was arc4random_stir(), but it has been removed in
37 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
38 function when detected.
40 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
41 cause callback expansion.
43 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
44 syntax errors in an expansion can be treated as a string instead of
45 logging or causing an error, due to the internal use of bool_lax
46 instead of bool when processing it.
48 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
49 server certificates when making smtp deliveries.
51 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
53 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
55 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
57 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
58 Merged patch from Sebastian Wiedenroth.
60 JH/05 Fix results-pipe from transport process. Several recipients, combined
61 with certificate use, exposed issues where response data items split
62 over buffer boundaries were not parsed properly. This eventually
63 resulted in duplicates being sent. This issue only became common enough
64 to notice due to the introduction of conection certificate information,
65 the item size being so much larger. Found and fixed by Wolfgang Breyha.
67 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
68 size buffer was used, resulting in syntax errors when an expansion
71 JH/07 Add support for directories of certificates when compiled with a GnuTLS
72 version 3.3.6 or later.
74 JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef
75 is EXPERIMENTAL_EVENT, the main-configuration and transport options
76 both become "event_action", the variables become $event_name, $event_data
77 and $event_defer_errno. There is a new variable $verify_mode, usable in
78 routers, transports and related events. The tls:cert event is now also
79 raised for inbound connections, if the main configuration event_action
82 TL/06 In test suite, disable OCSP for old versions of openssl which contained
83 early OCSP support, but no stapling (appears to be less than 1.0.0).
85 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
86 server certificate names available under the smtp transport option
87 "tls_verify_cert_hostname" now do not permit multi-component wildcard
90 JH/10 Time-related extraction expansions from certificates now use the main
91 option "timezone" setting for output formatting, and are consistent
92 between OpenSSL and GnuTLS compilations. Bug 1541.
94 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
95 encoded parameter in the incoming message. Bug 1558.
97 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
98 include certificate info, eximon was claiming there were spoolfile
101 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
103 JH/14 Log delivery-related information more consistently, using the sequence
104 "H=<name> [<ip>]" wherever possible.
106 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
107 are problematic for Debian distribution, omit them from the release
110 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
112 JH/16 Fix string representation of time values on 64bit time_t anchitectures.
115 JH/17 Fix a null-indirection in certextract expansions when a nondefault
116 output list separator was used.
121 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
122 checkers that were complaining about end of non-void function with no
125 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
126 This was a regression intruduced in 4.83 by another bugfix.
128 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
130 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
131 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
137 TF/01 Correctly close the server side of TLS when forking for delivery.
139 When a message was received over SMTP with TLS, Exim failed to clear up
140 the incoming connection properly after forking off the child process to
141 deliver the message. In some situations the subsequent outgoing
142 delivery connection happened to have the same fd number as the incoming
143 connection previously had. Exim would try to use TLS and fail, logging
144 a "Bad file descriptor" error.
146 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
147 utilities have not been installed.
149 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
150 temporary space as the ACL may create new global variables.
152 TL/01 LDAP support uses per connection or global context settings, depending
153 upon the detected version of the libraries at build time.
155 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
156 to extract and use the src ip:port in logging and expansions as if it
157 were a direct connection from the outside internet. PPv2 support was
158 updated based on HAProxy spec change in May 2014.
160 JH/02 Add ${listextract {number}{list}{success}{fail}}.
162 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
163 Properly escape header and check for NULL return.
165 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
168 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
170 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
171 characters in header names, implemented as a verify condition.
172 Contributed by Michael Fischer v. Mollard.
174 TL/05 Rename SPF condition results err_perm and err_temp to standardized
175 results permerror and temperror. Previous values are deprecated but
176 still accepted. In a future release, err_perm and err_temp will be
177 completely removed, which will be a backward incompatibility if the
178 ACL tests for either of these two old results. Patch contributed by
179 user bes-internal on the mailing list.
181 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
183 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
184 selectors, in both main and reject logs.
186 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
189 JH/07 Add malware type "sock" for talking to simple daemon.
191 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
193 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
194 routers/transports under cutthrough routing.
196 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
197 numbers. Touch up "bool" conditional to keep the same definition.
199 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
201 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
203 JH/12 Expand items in router/transport headers_add or headers_remove lists
204 individually rather than the list as a whole. Bug 1452.
206 Required for reasonable handling of multiple headers_ options when
207 they may be empty; requires that headers_remove items with embedded
208 colons must have them doubled (or the list-separator changed).
210 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
211 view the policy declared in the DMARC record. Currently, $dmarc_status
212 is a combined value of both the record presence and the result of the
215 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
217 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
218 dnslookup router and the smtp transport (applying to the forward
221 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
222 of ldap servers used for a specific lookup. Patch provided by Heiko
225 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
226 New variable $lookup_dnssec_authenticated for observability.
228 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
229 Patch submitted by Lars Timman.
231 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
233 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
234 Requires trusted mode and valid format message id, aborts otherwise.
235 Patch contributed by Heiko Schlichting.
237 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
238 certextract with support for various fields. Bug 1358.
240 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
241 is requested by default, modifiable by smtp transport option
244 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
245 operate on certificate variables to give certificate fingerprints
246 Also new ${sha256:cert_variable}.
248 JH/23 The PRDR feature is moved from being Experimental into the mainline.
250 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
251 Christian Aistleitner.
253 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
255 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
256 file. Patch from Wolfgang Breyha.
258 JH/25 Expand the coverage of the delivery $host and $host_address to
259 client authenticators run in verify callout. Bug 1476.
261 JH/26 Port service names are now accepted for tls_on_connect_ports, to
262 align with daemon_smtp_ports. Bug 72.
264 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
265 support and error reporting did not work properly.
267 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
268 and is readable. Patch from Andrew Colin Kissa.
270 TL/14 Enhance documentation of ${run expansion and how it parses the
271 commandline after expansion, particularly in the case when an
272 unquoted variable expansion results in an empty value.
274 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
276 PP/02 Fix internal collision of T_APL on systems which support RFC3123
277 by renaming away from it. Addresses GH issue 15, reported by
280 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
282 TL/15 SECURITY: prevent double expansion in math comparison functions
283 (can expand unsanitized data). Not remotely exploitable.
290 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
292 PP/02 Make -n do something, by making it not do something.
293 When combined with -bP, the name of an option is not output.
295 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
298 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
299 $sender_host_name and config options to manage this, and basic check
302 PP/05 DSCP support for outbound connections and control modifier for inbound.
304 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
305 (Only plugin which currently uses this is kerberos4, which nobody should
306 be using, but we should make it available and other future plugins might
307 conceivably use it, even though it would break NAT; stuff *should* be
308 using channel bindings instead).
310 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
311 name; added for Sendmail compatibility; requires admin caller.
312 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
313 just ignore it); requires trusted caller.
314 Also parse but ignore: -Ac -Am -X<logfile>
317 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
319 TL/02 Add +smtp_confirmation as a default logging option.
321 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
322 Patch by Magnus Holmgren from 2007-02-20.
324 TL/04 Bugzilla 1281 - Spec typo.
325 Bugzilla 1283 - Spec typo.
326 Bugzilla 1290 - Spec grammar fixes.
328 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
330 TL/06 Add Experimental DMARC support using libopendmarc libraries.
332 TL/07 Fix an out of order global option causing a segfault. Reported to dev
333 mailing list by by Dmitry Isaikin.
335 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
337 JH/02 Support "G" suffix to numbers in ${if comparisons.
339 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
341 NM/01 Bugzilla 1197 - Spec typo
342 Bugzilla 1196 - Spec examples corrections
344 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
346 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
347 gnutls_enable_pkcs11, but renamed to more accurately indicate its
350 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
351 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
353 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
354 "acl {{name}{arg}...}", and optional args on acl condition
357 JH/05 Permit multiple router/transport headers_add/remove lines.
359 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
361 JH/07 Avoid using a waiting database for a single-message-only transport.
362 Performance patch from Paul Fisher. Bugzilla 1262.
364 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
367 JH/09 Add $headers_added variable, with content from use of ACL modifier
368 add_header (but not yet added to the message). Bugzilla 199.
370 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
371 Pulled from Bugzilla 817 by Wolfgang Breyha.
373 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
375 (nb: this is the same fix as in Exim 4.80.1)
377 JH/11 Add A= logging on delivery lines, and a client_set_id option on
380 JH/12 Add optional authenticated_sender logging to A= and a log_selector
383 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
385 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
386 advertise SMTP AUTH mechanism to us, instead of a generic
387 protocol violation error. Also, make Exim more robust to bad
388 data from the Dovecot auth socket.
390 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
392 When a queue runner is handling a message, Exim first routes the
393 recipient addresses, during which it prunes them based on the retry
394 hints database. After that it attempts to deliver the message to
395 any remaining recipients. It then updates the hints database using
398 So if a recipient address works intermittently, it can get repeatedly
399 deferred at routing time. The retry hints record remains fresh so the
400 address never reaches the final cutoff time.
402 This is a fairly common occurrence when a user is bumping up against
403 their storage quota. Exim had some logic in its local delivery code
404 to deal with this. However it did not apply to per-recipient defers
405 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
407 This change adds a proper retry rule check during routing so that the
408 final cutoff time is checked against the message's age. We only do
409 this check if there is an address retry record and there is not a
410 domain retry record; this implies that previous attempts to handle
411 the address had the retry_use_local_parts option turned on. We use
412 this as an approximation for the destination being like a local
413 delivery, as in LMTP.
415 I suspect this new check makes the old local delivery cutoff check
416 redundant, but I have not verified this so I left the code in place.
418 TF/02 Correct gecos expansion when From: is a prefix of the username.
420 Test 0254 submits a message to Exim with the header
424 When I ran the test suite under the user fanf2, Exim expanded
425 the header to contain my full name, whereas it should have added
426 a Resent-Sender: header. It erroneously treats any prefix of the
427 username as equal to the username.
429 This change corrects that bug.
431 GF/01 DCC debug and logging tidyup
432 Error conditions log to paniclog rather than rejectlog.
433 Debug lines prefixed by "DCC: " to remove any ambiguity.
435 TF/03 Avoid unnecessary rebuilds of lookup-related code.
437 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
438 Bug spotted by Jeremy Harris; was flawed since initial commit.
439 Would have resulted in OCSP responses post-SNI triggering an Exim
440 NULL dereference and crash.
442 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
444 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
445 Bug detection, analysis and fix by Samuel Thibault.
446 Bugzilla 1331, Debian bug #698092.
448 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
450 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
451 Server implementation by Todd Lyons, client by JH.
452 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
453 config variable "prdr_enable" controls whether the server
454 advertises the facility. If the client requests PRDR a new
455 acl_data_smtp_prdr ACL is called once for each recipient, after
456 the body content is received and before the acl_smtp_data ACL.
457 The client is controlled by bolth of: a hosts_try_prdr option
458 on the smtp transport, and the server advertisement.
459 Default client logging of deliveries and rejections involving
460 PRDR are flagged with the string "PRDR".
462 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
463 fclose(). Diagnosis by Todd Lyons.
465 PP/17 Update configure.default to handle IPv6 localhost better.
466 Patch by Alain Williams (plus minor tweaks).
469 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
470 This is now consistent with GnuTLS, and is now documented: the
471 previous undocumented portable approach to treating the option as
472 unset was to force an expansion failure. That still works, and
473 an empty string is now equivalent.
475 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
476 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
477 not performing validation itself.
479 PP/20 Added force_command boolean option to pipe transport.
480 Patch from Nick Koston, of cPanel Inc.
482 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
485 TF/04 Added udpsend ACL modifer and hexquote expansion operator
487 PP/21 Fix eximon continuous updating with timestamped log-files.
488 Broken in a format-string cleanup in 4.80, missed when I repaired the
489 other false fix of the same issue.
490 Report and fix from Heiko Schlichting.
493 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
494 Report from Prashanth Katuri.
496 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
497 It's SecureTransport, so affects any MacOS clients which use the
498 system-integrated TLS libraries, including email clients.
500 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
501 using a MIME ACL for non-SMTP local injection.
502 Report and assistance in diagnosis by Warren Baker.
504 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
506 JH/16 Fix comparisons for 64b. Bugzilla 1385.
508 TL/09 Add expansion variable $authenticated_fail_id to keep track of
509 last id that failed so it may be referenced in subsequent ACL's.
511 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
514 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
515 ldap library initialization, allowing self-signed CA's to be
516 used. Also properly sets require_cert option later in code by
517 using NULL (global ldap config) instead of ldap handle (per
518 session). Bug diagnosis and testing by alxgomz.
520 TL/12 Enhanced documentation in the ratelimit.pl script provided in
521 the src/util/ subdirectory.
523 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
524 renamed to Transport Post Delivery Action by Jeremy Harris, as
527 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
528 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
529 redis_servers = needs to be configured which will be used by the redis
530 lookup. Patch from Warren Baker, of The Packet Hub.
532 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
534 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
535 hostname or reverse DNS when processing a host list. Used suggestions
536 from multiple comments on this bug.
538 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
540 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
541 Missed a few lines, added it to make the runtest require no keyboard
544 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
545 contains upper case chars. Make router use caseful_local_part.
547 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
548 support when GnuTLS has been built with p11-kit.
554 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
556 This, or similar/improved, will also be change PP/11 of 4.82.
562 PP/01 Handle short writes when writing local log-files.
563 In practice, only affects FreeBSD (8 onwards).
564 Bugzilla 1053, with thanks to Dmitry Isaikin.
566 NM/01 Bugzilla 949 - Documentation tweak
568 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
571 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
573 PP/02 Implemented gsasl authenticator.
575 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
577 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
578 `pkg-config foo` for cflags/libs.
580 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
581 with rest of GSASL and with heimdal_gssapi.
583 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
584 `pkg-config foo` for cflags/libs for the TLS implementation.
586 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
587 properties get this fed in as external SSF. A number of robustness
588 and debugging improvements to the cyrus_sasl authenticator.
590 PP/08 cyrus_sasl server now expands the server_realm option.
592 PP/09 Bugzilla 1214 - Log authentication information in reject log.
593 Patch by Jeremy Harris.
595 PP/10 Added dbmjz lookup type.
597 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
599 PP/12 MAIL args handles TAB as well as SP, for better interop with
600 non-compliant senders.
601 Analysis and variant patch by Todd Lyons.
603 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
604 Bug report from Lars Müller <lars@samba.org> (via SUSE),
605 Patch from Dirk Mueller <dmueller@suse.com>
607 PP/13 tls_peerdn now print-escaped for spool files.
608 Observed some $tls_peerdn in wild which contained \n, which resulted
609 in spool file corruption.
611 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
612 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
613 or write after TLS renegotiation, which otherwise led to messages
616 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
617 as a tracking header (ie: a signed header comes before the signature).
618 Patch from Wolfgang Breyha.
620 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
621 comma-sep list; embedded commas doubled.
623 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
625 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
627 Report and patch from Dmitry Banschikov.
629 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
630 Removed SSL_clear() after SSL_new() which led to protocol negotiation
631 failures. We appear to now support TLS1.1+ with Exim.
633 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
634 lets Exim select keys and certificates based upon TLS SNI from client.
635 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
636 before an outbound SMTP session. New log_selector, +tls_sni.
638 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
639 NULL dereference. Report and patch from Alun Jones.
641 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
642 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
643 Not seeing resolver debug output on NetBSD, but suspect this is a
644 resolver implementation change.
646 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
647 Left warnings. Added "eximon gdb" invocation mode.
649 PP/21 Defaulting "accept_8bitmime" to true, not false.
651 PP/22 Added -bw for inetd wait mode support.
653 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
654 locate the relevant includes and libraries. Made this the default.
656 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
657 Bugzilla 1246, report and most of solution from Tomasz Kusy.
659 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
660 This may cause build issues on older platforms.
662 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
663 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
664 gnutls_require_mac & gnutls_require_protocols (no longer supported).
665 Added SNI support via GnuTLS too.
666 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
668 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
670 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
671 Applied second patch from Janne, implementing suggestion to default
672 multiple-strings-in-record handling to match SPF spec.
674 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
676 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
677 read-only, out of scope).
678 Patch from Wolfgang Breyha, report from Stuart Northfield.
680 PP/29 Fix three issues highlighted by clang analyser static analysis.
681 Only crash-plausible issue would require the Cambridge-specific
682 iplookup router and a misconfiguration.
683 Report from Marcin Mirosław.
685 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
687 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
688 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
689 As part of this, removing so much warning spew let me fix some minor
690 real issues in debug logging.
692 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
693 assignment on my part. Fixed.
695 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
696 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
697 Janne Snabb (who went above and beyond: thank you).
699 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
700 string otherwise requires a connection and a bunch more work and it's
701 relatively easy to get wrong. Should also expose TLS library linkage
704 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
705 64-bit ${eval} (JH/03).
707 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
708 GNU libc to support some of the 64-bit stuff, should not lead to
709 conflicts. Defined before os.h is pulled in, so if a given platform
710 needs to override this, it can.
712 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
713 protection layer was required, which is not implemented.
714 Bugzilla 1254, patch from Wolfgang Breyha.
716 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
717 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
718 tls_dhparam take prime identifiers. Also unbreak combination of
719 OpenSSL+DH_params+TLSSNI.
721 PP/39 Disable SSLv2 by default in OpenSSL support.
727 PP/01 Solaris build fix for Oracle's LDAP libraries.
728 Bugzilla 1109, patch from Stephen Usher.
730 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
732 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
735 TF/02 Fix a couple more cases where we did not log the error message
736 when unlink() failed. See also change 4.74-TF/03.
738 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
739 lock up or crash if it happened to be inside a call to libc when it
740 got a SIGUSR1 from exiwhat.
742 The SIGUSR1 handler appends the current process status to the process
743 log which is later printed by exiwhat. It used to use the general
744 purpose logging code to do this, but several functions it calls are
745 not safe for signals.
747 The new output code in the SIGUSR1 handler is specific to the process
748 log, and simple enough that it's easy to inspect for signal safety.
749 Removing some special cases also simplifies the general logging code.
750 Removing the spurious timestamps from the process log simplifies
753 TF/04 Improved ratelimit ACL condition.
755 The /noupdate option has been deprecated in favour of /readonly which
756 has clearer semantics. The /leaky, /strict, and /readonly update modes
757 are mutually exclusive. The update mode is no longer included in the
758 database key; it just determines when the database is updated. (This
759 means that when you upgrde Exim will forget old rate measurements.)
761 Exim now checks that the per_* options are used with an update mode that
762 makes sense for the current ACL. For example, when Exim is processing a
763 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
764 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
765 must specify per_mail/readonly. If you omit the update mode it defaults to
766 /leaky where that makes sense (as before) or /readonly where required.
768 The /noupdate option is now undocumented but still supported for
769 backwards compatibility. It is equivalent to /readonly except that in
770 ACLs where /readonly is required you may specify /leaky/noupdate or
771 /strict/noupdate which are treated the same as /readonly.
773 A useful new feature is the /count= option. This is a generalization
774 of the per_byte option, so that you can measure the throughput of other
775 aggregate values. For example, the per_byte option is now equivalent
776 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
778 The per_rcpt option has been generalized using the /count= mechanism
779 (though it's more complicated than the per_byte equivalence). When it is
780 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
781 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
782 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
783 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
784 Note that using per_rcpt with a non-readonly update mode in more than
785 one ACL will cause the recipients to be double-counted. (The per_mail
786 and per_byte options don't have this problem.)
788 The handling of very low rates has changed slightly. If the computed rate
789 is less than the event's count (usually one) then this event is the first
790 after a long gap. In this case the rate is set to the same as this event's
791 count, so that the first message of a spam run is counted properly.
793 The major new feature is a mechanism for counting the rate of unique
794 events. The new per_addr option counts the number of different
795 recipients that someone has sent messages to in the last time period. It
796 behaves like per_rcpt if all the recipient addresses are different, but
797 duplicate recipient addresses do not increase the measured rate. Like
798 the /count= option this is a general mechanism, so the per_addr option
799 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
800 example, measure the rate that a client uses different sender addresses
801 with the options per_mail/unique=$sender_address. There are further
802 details in the main documentation.
804 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
806 TF/06 Removed a few PCRE remnants.
808 TF/07 Automatically extract Exim's version number from tags in the git
809 repository when doing development or release builds.
811 PP/02 Raise smtp_cmd_buffer_size to 16kB.
812 Bugzilla 879. Patch from Paul Fisher.
814 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
815 Heavily based on revision 40f9a89a from Simon Arlott's tree.
818 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
820 PP/05 Variable $av_failed, true if the AV scanner deferred.
821 Bugzilla 1078. Patch from John Horne.
823 PP/06 Stop make process more reliably on build failure.
824 Bugzilla 1087. Patch from Heiko Schlittermann.
826 PP/07 Make maildir_use_size_file an _expandable_ boolean.
827 Bugzilla 1089. Patch from Heiko Schlittermann.
829 PP/08 Handle ${run} returning more data than OS pipe buffer size.
830 Bugzilla 1131. Patch from Holger Weiß.
832 PP/09 Handle IPv6 addresses with SPF.
833 Bugzilla 860. Patch from Wolfgang Breyha.
835 PP/10 GnuTLS: support TLS 1.2 & 1.1.
837 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
840 PP/11 match_* no longer expand right-hand-side by default.
841 New compile-time build option, EXPAND_LISTMATCH_RHS.
842 New expansion conditions, "inlist", "inlisti".
844 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
846 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
848 PP/14 fix log_write() format string regression from TF/03.
849 Bugzilla 1152. Patch from Dmitry Isaikin.
855 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
857 PP/02 Harmonised TLS library version reporting; only show if debugging.
858 Layout now matches that introduced for other libraries in 4.74 PP/03.
860 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
862 PP/04 New "dns_use_edns0" global option.
864 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
867 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
868 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
870 TK/01 Updated PolarSSL code to 0.14.2.
871 Bugzilla 1097. Patch from Andreas Metzler.
873 PP/07 Catch divide-by-zero in ${eval:...}.
876 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
879 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
880 format-string attack -- SECURITY: remote arbitrary code execution.
882 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
883 time unintentionally subject to list matching rules, letting the header
884 cause arbitrary Exim lookups (of items which can occur in lists, *not*
885 arbitrary string expansion). This allowed for information disclosure.
887 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
888 INT_MIN/-1 -- value coerced to INT_MAX.
894 NM/01 Workround for PCRE version dependency in version reporting
897 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
898 This fixes portability to compilers other than gcc, notably
899 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
901 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
902 makefiles for portability to HP-UX and POSIX correctness.
904 PP/01 Permit LOOKUP_foo enabling on the make command-line.
905 Also via indented variable definition in the Makefile.
906 (Debugging by Oliver Heesakkers).
908 PP/02 Restore caching of spamd results with expanded spamd_address.
909 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
911 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
912 Improves build reliability. Fix from: Frank Elsner
914 NM/02 Fix wide character breakage in the rfc2047 coding
915 Fixes bug 1064. Patch from Andrey N. Oktyabrski
917 NM/03 Allow underscore in dnslist lookups
918 Fixes bug 1026. Patch from Graeme Fowler
920 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
921 Code patches from Adam Ciarcinski of NetBSD.
923 NM/04 Fixed exiqgrep to cope with mailq missing size issue
926 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
927 is logged, to avoid truncation. Patch from John Horne.
929 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
930 Patch from Jakob Hirsch.
932 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
933 SQL string expansion failure details.
934 Patch from Andrey Oktyabrski.
936 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
937 Patch from Simon Arlott.
939 PP/09 New lookups functionality failed to compile on old gcc which rejects
940 extern declarations in function scope.
941 Patch from Oliver Fleischmann
943 PP/10 Use sig_atomic_t for flags set from signal handlers.
944 Check getgroups() return and improve debugging.
945 Fixed developed for diagnosis in bug 927 (which turned out to be
948 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
949 Patch from Mark Zealey.
951 PP/12 Bugzilla 1056: Improved spamd server selection.
952 Patch from Mark Zealey.
954 PP/13 Bugzilla 1086: Deal with maildir quota file races.
955 Based on patch from Heiko Schlittermann.
957 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
958 Patch from Uwe Doering, sign-off by Michael Haardt.
960 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
961 variable declaration deep within a block. Bug and patch from
964 PP/15 lookups-Makefile IRIX compatibilty coercion.
966 PP/16 Make DISABLE_DKIM build knob functional.
968 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
969 Patch by Simon Arlott
971 TF/03 Fix valgrind.h portability to C89 compilers that do not support
972 variable argument macros. Our copy now differs from upstream.
978 TF/01 Failure to get a lock on a hints database can have serious
979 consequences so log it to the panic log.
981 TF/02 Log LMTP confirmation messages in the same way as SMTP,
982 controlled using the smtp_confirmation log selector.
984 TF/03 Include the error message when we fail to unlink a spool file.
986 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
987 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
988 for maintaining out-of-tree patches for some time.
990 PP/01 Bugzilla 139: Documentation and portability issues.
991 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
992 Handle per-OS dynamic-module compilation flags.
994 PP/02 Let /dev/null have normal permissions.
995 The 4.73 fixes were a little too stringent and complained about the
996 permissions on /dev/null. Exempt it from some checks.
997 Reported by Andreas M. Kirchwitz.
999 PP/03 Report version information for many libraries, including
1000 Exim version information for dynamically loaded libraries. Created
1001 version.h, now support a version extension string for distributors
1002 who patch heavily. Dynamic module ABI change.
1004 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1005 privilege escalation vulnerability whereby the Exim run-time user
1006 can cause root to append content of the attacker's choosing to
1009 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1012 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1013 If dropping privileges for untrusted macros, we disabled normal logging
1014 on the basis that it would fail; for the Exim run-time user, this is not
1015 the case, and it resulted in successful deliveries going unlogged.
1016 Fixed. Reported by Andreas Metzler.
1022 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1023 only prepend for the Resent-* case. Fixes regression introduced in
1024 Exim 4.70 by NM/22 for Bugzilla 607.
1026 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1027 increasing numbers of administrators be bitten by this.
1029 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1031 PP/03 Bugzilla 994: added openssl_options main configuration option.
1033 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1035 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1037 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1039 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1040 without a peer certificate, leading to a segfault because of an
1041 assumption that peers always have certificates. Be a little more
1042 paranoid. Problem reported by Martin Tscholak.
1044 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1045 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1046 NB: ClamAV planning to remove STREAM in "middle of 2010".
1047 CL also introduces -bmalware, various -d+acl logging additions and
1048 more caution in buffer sizes.
1050 PP/09 Implemented reverse_ip expansion operator.
1052 PP/10 Bugzilla 937: provide a "debug" ACL control.
1054 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1056 PP/12 Bugzilla 973: Implement --version.
1058 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1060 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1062 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1064 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1065 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1066 ignore trailing whitespace.
1068 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1070 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1073 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1074 Notification from Dr Andrew Aitchison.
1076 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1077 ExtendedDetectionInfo response format.
1078 Notification from John Horne.
1080 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1083 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1084 XSL and documented dependency on system catalogs, with examples of how
1087 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1090 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1091 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1092 configuration file which is writeable by the Exim user or group.
1094 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1095 of configuration files to cover files specified with the -C option if
1096 they are going to be used with root privileges, not just the default
1099 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1100 option (effectively making it always true).
1102 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1103 files to be used while preserving root privileges.
1105 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1106 that rogue child processes cannot use them.
1108 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1109 run-time user, instead of root.
1111 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1112 Exim run-time user without dropping privileges.
1114 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1115 result string, instead of calling string_vformat() twice with the same
1118 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1119 for other users. Others should always drop root privileges if they use
1120 -C on the command line, even for a whitelisted configure file.
1122 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1124 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1130 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1131 $data_path, and $header_path variables; fixed documentation bugs and
1134 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1135 exipick to access non-standard spools, including the "frozen" queue
1138 NM/01 Bugzilla 965: Support mysql stored procedures.
1139 Patch from Alain Williams
1141 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1143 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1144 Patch from Andreas Metzler
1146 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1147 Patch from Kirill Miazine
1149 NM/05 Bugzilla 671: Added umask to procmail example.
1151 JJ/03 installed exipick 20100323.0, fixing doc bug
1153 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1154 directory. Notification and patch from Dan Rosenberg.
1156 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1158 TK/02 Improve log output when DKIM signing operation fails.
1160 MH/01 Treat the transport option dkim_domain as a colon separated
1161 list, not as a single string, and sign the message with each element,
1162 omitting multiple occurences of the same signer.
1164 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1165 Bugzilla 985, 986. Patch by Simon Arlott
1167 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1168 Patch by Simon Arlott
1170 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1171 MBX locking. Notification from Dan Rosenberg.
1177 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1179 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1181 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1183 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1185 NM/04 Bugzilla 915: Flag broken perl installation during build.
1191 TK/01 Added patch by Johannes Berg that expands the main option
1192 "spamd_address" if it starts with a dollar sign.
1194 TK/02 Write list of recipients to X-Envelope-Sender header when building
1195 the mbox-format spool file for content scanning (suggested by Jakob
1198 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1199 (http://www.dcc-servers.net/) support via dccifd. Activated by
1200 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1202 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1203 by Mark Daniel Reidel <mr@df.eu>.
1205 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1206 When building exim an external PCRE library is now needed -
1207 PCRE is a system library on the majority of modern systems.
1208 See entry on PCRE_LIBS in EDITME file.
1210 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1211 conversation. Added nologin parameter to request.
1212 Patch contributed by Kirill Miazine.
1214 TF/01 Do not log submission mode rewrites if they do not change the address.
1216 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1218 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1219 log files in place. Contributed by Roberto Lima.
1221 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1223 TF/03 Bugzilla 615: When checking the local_parts router precondition
1224 after a local_part_suffix or local_part_prefix option, Exim now
1225 does not use the address's named list lookup cache, since this
1226 contains cached lookups for the whole local part.
1228 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1229 Robert Millan. Documentation is in experimental-spec.txt.
1231 TF/04 Bugzilla 668: Fix parallel build (make -j).
1233 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1235 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1236 Patch provided by Jan Srzednicki.
1238 TF/05 Leading white space used to be stripped from $spam_report which
1239 wrecked the formatting. Now it is preserved.
1241 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1242 that they are available at delivery time.
1244 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1246 TF/08 TLS error reporting now respects the incoming_interface and
1247 incoming_port log selectors.
1249 TF/09 Produce a more useful error message if an SMTP transport's hosts
1250 setting expands to an empty string.
1252 NM/06 Bugzilla 744: EXPN did not work under TLS.
1253 Patch provided by Phil Pennock.
1255 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1256 Patch provided by Richard Godbee.
1258 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1259 acl_smtp_notquit, added index entry.
1261 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1262 Patch provided by Eugene Bujak.
1264 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1265 accept(). Patch provided by Maxim Dounin.
1267 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1268 Patch provided by Phil Pennock.
1270 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1272 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1273 Patch provided by Brad "anomie" Jorsch.
1275 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1276 Patch provided by Dean Brooks.
1278 TK/05 Add native DKIM support (does not depend on external libraries).
1280 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1281 Patch provided by Graeme Fowler.
1283 NM/16 Bugzilla 851: Documentation example syntax fix.
1285 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1287 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1290 NM/19 Bugzilla 745: TLS version reporting.
1291 Patch provided by Phil Pennock.
1293 NM/20 Bugzilla 167: bool: condition support.
1294 Patch provided by Phil Pennock.
1296 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1297 clients. Patch provided by Phil Pennock.
1299 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1300 Patch provided by Brad "anomie" Jorsch.
1302 NM/23 Bugzilla 687: Fix misparses in eximstats.
1303 Patch provided by Heiko Schlittermann.
1305 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1306 Patch provided by Heiko Schlittermann.
1308 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1309 plus update to original patch.
1311 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1313 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1314 Patch provided by David Brownlee.
1316 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1318 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1320 NM/30 Bugzilla 888: TLS documentation bugfixes.
1322 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1324 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1325 Unlike the original bugzilla I have changed all shell scripts in src tree.
1327 NM/33 Bugzilla 898: Transport filter timeout fix.
1328 Patch by Todd Rinaldo.
1330 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1331 Patch by Serge Demonchaux.
1333 NM/35 Bugzilla 39: Base64 decode bug fixes.
1334 Patch by Jakob Hirsch.
1336 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1338 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1340 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1342 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1348 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1349 ALT-N's libdkim that I have put here:
1350 http://duncanthrax.net/exim-experimental/
1352 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1353 were called 'true' and it seems that C99 defines that as a reserved
1354 keyword to be used with 'bool' variable types. That means you could
1355 not include C99-style headers which use bools without triggering
1356 build errors in sieve.c.
1358 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1359 as mailq or other aliases. Changed the --help handling significantly
1360 to do whats expected. exim_usage() emits usage/help information.
1362 SC/01 Added the -bylocaldomain option to eximstats.
1364 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1366 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1368 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1374 PH/01 Another patch from the Sieve maintainer.
1376 PH/02 When an IPv6 address is converted to a string for single-key lookup
1377 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1378 dots are used instead of colons so that keys in lsearch files need not
1379 contain colons. This was done some time before quoting was made available
1380 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1381 (notated using the quote facility) so as to distinguish them from IPv4
1382 keys. This meant that lookups for IP addresses in host lists did not work
1383 for iplsearch lookups.
1385 This has been fixed by arranging for IPv6 addresses to be expressed with
1386 colons if the lookup type is iplsearch. This is not incompatible, because
1387 previously such lookups could never work.
1389 The situation is now rather anomolous, since one *can* have colons in
1390 ordinary lsearch keys. However, making the change in all cases is
1391 incompatible and would probably break a number of configurations.
1393 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1396 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1397 conversion specification without a maximum field width, thereby enabling
1398 a rogue spamd server to cause a buffer overflow. While nobody in their
1399 right mind would setup Exim to query an untrusted spamd server, an
1400 attacker that gains access to a server running spamd could potentially
1401 exploit this vulnerability to run arbitrary code as the Exim user.
1403 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1404 $primary_hostname instead of what libspf2 thinks the hosts name is.
1406 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1407 a directory entry by the name of the lookup key. Previously, if a
1408 symlink pointed to a non-existing file or a file in a directory that
1409 Exim lacked permissions to read, a lookup for a key matching that
1410 symlink would fail. Now it is enough that a matching directory entry
1411 exists, symlink or not. (Bugzilla 503.)
1413 PH/03 The body_linecount and body_zerocount variables are now exported in the
1416 PH/04 Added the $dnslist_matched variable.
1418 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1419 This means they are set thereafter only if the connection becomes
1422 PH/06 Added the client_condition to authenticators so that some can be skipped
1423 by clients under certain conditions.
1425 PH/07 The error message for a badly-placed control=no_multiline_responses left
1426 "_responses" off the end of the name.
1428 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1430 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1431 (without spaces) instead of just copying the configuration text.
1433 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1435 PH/11 Added $max_received_linelength.
1437 PH/12 Added +ignore_defer and +include_defer to host lists.
1439 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1440 way in which PCRE > 7.0 is built.
1442 PH/14 Implemented queue_only_load_latch.
1444 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1445 MAIL command. The effect was to mangle the value on 64-bit systems.
1447 PH/16 Another patch from the Sieve maintainer.
1449 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1451 PH/18 If a system quota error occurred while trying to create the file for
1452 a maildir delivery, the message "Mailbox is full" was not appended to the
1453 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1454 only to a quota excession during the actual writing of the file.
1456 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1457 characters?) which causes problems in log lines. The DN values are now
1458 passed through string_printing() before being added to log lines.
1460 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1461 and InterBase are left for another time.)
1463 PH/21 Added message_body_newlines option.
1465 PH/22 Guard against possible overflow in moan_check_errorcopy().
1467 PH/23 POSIX allows open() to be a macro; guard against that.
1469 PH/24 If the recipient of an error message contained an @ in the local part
1470 (suitably quoted, of course), incorrect values were put in $domain and
1471 $local_part during the evaluation of errors_copy.
1477 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1478 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1481 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1482 issue a MAIL command.
1484 PH/02 In an ACL statement such as
1486 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1488 if a client was not listed at all, or was listed with a value other than
1489 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1490 the condition was not true (as it should be), so access was not denied.
1491 The bug was that the ! inversion was incorrectly passed on to the second
1492 item. This has been fixed.
1494 PH/03 Added additional dnslists conditions == and =& which are different from
1495 = and & when the dns lookup returns more than one IP address.
1497 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1498 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1500 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1501 FSYNC, which compiles an option called disable_fsync that allows for
1502 bypassing fsync(). The documentation is heavily laced with warnings.
1504 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1506 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1507 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1508 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1509 including adding "make clean"; (3) Added -fPIC when compiling the test
1510 dynamically loaded module, to get rid of a warning.
1512 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1513 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1514 = 0s. The bug is otherwise harmless.
1516 PH/07 There was a bug in the dovecot authenticator such that the value of
1517 $auth1 could be overwritten, and so not correctly preserved, after a
1518 successful authentication. This usually meant that the value preserved by
1519 the server_setid option was incorrect.
1521 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1523 PH/09 Installed PCRE release 7.0.
1525 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1526 run for batched SMTP input. It is now run at the start of every message
1527 in the batch. While fixing this I discovered that the process information
1528 (output by running exiwhat) was not always getting set for -bs and -bS
1529 input. This is fixed, and it now also says "batched" for BSMTP.
1531 PH/11 Added control=no_pipelining.
1533 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1534 patch, slightly modified), and move the expansion of helo_data till after
1535 the connection is made in the smtp transport (so it can use these
1538 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1540 PH/14 Added log_selector = +pid.
1542 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1544 PH/16 Add ${if forany and ${if forall.
1546 PH/17 Added dsn_from option to vary the From: line in DSNs.
1548 PH/18 Flush SMTP output before performing a callout, unless control =
1549 no_callout_flush is set.
1551 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1552 was true (the default) a successful delivery failed to delete the retry
1553 item, thus causing premature timeout of the address. The bug is now
1556 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1558 PH/21 Long custom messages for fakedefer and fakereject are now split up
1559 into multiline reponses in the same way that messages for "deny" and
1560 other ACL rejections are.
1562 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1563 with slight modification.
1565 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1566 draft, changing the syntax and factoring some duplicate code".
1568 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1569 for deliveries of the second and subsequent messages over the same SMTP
1572 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1573 ${reduce, with only minor "tidies".
1575 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1577 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1578 expansion side effects.
1580 PH/27 When a message times out after an over-quota error from an Exim-imposed
1581 quota, the bounce message says "mailbox is full". This message was not
1582 being given when it was a system quota that was exceeded. It now should
1585 MH/03 Made $recipients available in local_scan(). local_scan() already has
1586 better access to the recipient list through recipients_list[], but
1587 $recipients can be useful in postmaster-provided expansion strings.
1589 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1590 in the case of a MAIL command with additional options following the
1591 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1592 were accidentally chopped off.
1594 PH/29 SMTP synchronization checks are implemented when a command is read -
1595 there is a check that no more input is waiting when there shouldn't be
1596 any. However, for some commands, a delay in an ACL can mean that it is
1597 some time before the response is written. In this time, more input might
1598 arrive, invalidly. So now there are extra checks after an ACL has run for
1599 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1600 pipelining has not been advertised.
1602 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1604 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1605 returned in the SMTP response when smtp_return_error_details was false.
1606 This has been fixed.
1608 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1609 instead of the C I/O that was originally supplied, because problems were
1610 reported on Solaris.
1612 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1613 Exim which did not show up earlier: it was assuming that a call to
1614 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1615 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1616 was a macro that became an assignment, so it seemed to work. This has
1617 changed to a proper function call with a void return, hence the compile
1618 error. Exim's code has been fixed.
1620 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1623 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1625 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1627 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1628 because it turns out to be too big or there is a timeout) there is no
1629 "Completed" line in the log. When some messages of this type were
1630 selected by exigrep, they were listed as "not completed". Others were
1631 picked up by some special patterns. I have improved the selection
1632 criteria to be more general.
1634 PH/38 The host_find_failed option in the manualroute router can now be set
1635 to "ignore", to completely ignore a host whose IP address cannot be
1636 found. If all hosts are ignored, the behaviour is controlled by the new
1637 host_all_ignored option.
1639 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1640 homing or because of multiple MX records with /mx) generated more than
1641 one IP address, and the following item turned out to be the local host,
1642 all the secondary addresses of the first item were incorrectly removed
1643 from the list, along with the local host and any following hosts (which
1644 is what is supposed to happen).
1646 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1647 whoever called Exim into the -H file. In the case of the daemon it was
1648 behaving confusingly. When first started, it used values for whoever
1649 started the daemon, but after a SIGHUP it used the Exim user (because it
1650 calls itself on a restart). I have changed the code so that it now always
1653 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1654 message are rejected with the same error (e.g. no authentication or bad
1655 sender address), and a DATA command is nevertheless sent (as can happen
1656 with PIPELINING or a stupid MUA), the error message that was given to the
1657 RCPT commands is included in the rejection of the DATA command. This is
1658 intended to be helpful for MUAs that show only the final error to their
1661 PH/42 Another patch from the Sieve maintainer.
1663 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1664 Eximstats - Fixed some broken HTML links and added missing column headers
1666 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1667 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1669 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1671 PH/43 Yet another patch from the Sieve maintainer.
1673 PH/44 I found a way to check for a TCP/IP connection going away before sending
1674 the response to the final '.' that terminates a message, but only in the
1675 case where the client has not sent further data following the '.'
1676 (unfortunately, this is allowed). However, in many cases there won't be
1677 any further data because there won't be any more messages to send. A call
1678 to select() can be used: if it shows that the input is "ready", there is
1679 either input waiting, or the socket has been closed. An attempt to read
1680 the next input character can distinguish the two cases. Previously, Exim
1681 would have sent an OK response which the client would never have see.
1682 This could lead to message repetition. This fix should cure that, at
1683 least in a lot of common cases.
1685 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1686 advertised in response to EHLO.
1692 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1693 fixed by 4.65/MH/01 (is this a record?) are fixed:
1695 (i) An empty string was always treated as zero by the numeric comparison
1696 operators. This behaviour has been restored.
1698 (ii) It is documented that the numeric comparison operators always treat
1699 their arguments as decimal numbers. This was broken in that numbers
1700 starting with 0 were being interpreted as octal.
1702 While fixing these problems I realized that there was another issue that
1703 hadn't been noticed. Values of message_size_limit (both the global option
1704 and the transport option) were treated as octal if they started with 0.
1705 The documentation was vague. These values are now always treated as
1706 decimal, and I will make that clear in the documentation.
1712 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1713 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1716 MH/01 Don't check that the operands of numeric comparison operators are
1717 integers when their expansion is in "skipping" mode (fixes bug
1718 introduced by 4.64-PH/07).
1720 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1721 child addresses, Exim now panics and dies. Previously, because the count
1722 is held in a short int, deliveries were likely to be lost. As such a
1723 large number of recipients for a single message is ridiculous
1724 (performance will be very, very poor), I have chosen to impose a limit
1725 rather than extend the field.
1731 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1732 leftover -K file (the existence of which was triggered by #402).
1733 While we were at it, introduced process PID as part of the -K
1734 filename. This should rule out race conditions when creating
1737 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1738 processing considerably. Previous code took too long for large mails,
1739 triggering a timeout which in turn triggers #401.
1741 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1742 in the DK code in transports.c. sendfile() is not really portable,
1743 hence the _LINUX specificness.
1745 TF/01 In the add_headers option to the mail command in an Exim filter,
1746 there was a bug that Exim would claim a syntax error in any
1747 header after the first one which had an odd number of characters
1750 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1751 callout verification, Exim cached a "reject" for the entire domain. This
1752 is correct for most verifications, but it is not correct for a recipient
1753 verification with use_sender or use_postmaster set, because in that case
1754 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1755 case of MAIL FROM:<> rejection from other early rejections (e.g.
1756 rejection of HELO). When verifying a recipient using a non-null MAIL
1757 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1758 Whatever the result of the callout, the value of the domain cache is
1759 left unchanged (for any other kind of callout, getting as far as trying
1760 RCPT means that the domain itself is ok).
1762 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1765 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1766 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1767 session, the daemon ignores ECONNECT errors and logs others; it now
1768 ignores EPIPE as well.
1770 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1771 (quoted-printable decoding).
1773 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1774 later the small subsequent patch to fix an introduced bug.
1776 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1778 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1780 PH/08 An error is now given if message_size_limit is specified negative.
1782 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1783 to be given (somewhat) arbitrary names.
1785 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1788 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1789 miscellaneous code fixes
1791 PH/10 Added the log_reject_target ACL modifier to specify where to log
1794 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1795 hostname. This is wrong, because it relates to the incoming message (and
1796 probably the interface on which it is arriving) and not to the outgoing
1797 callout (which could be using a different interface). This has been
1798 changed to use the value of the helo_data option from the smtp transport
1799 instead - this is what is used when a message is actually being sent. If
1800 there is no remote transport (possible with a router that sets up host
1801 addresses), $smtp_active_hostname is used.
1803 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1804 tweaks were necessary in order to get it to work (see also 21 below):
1805 (a) The code assumed that strncpy() returns a negative number on buffer
1806 overflow, which isn't the case. Replaced with Exim's string_format()
1808 (b) There were several signed/unsigned issues. I just did the minimum
1809 hacking in of casts. There is scope for a larger refactoring.
1810 (c) The code used strcasecmp() which is not a standard C function.
1811 Replaced with Exim's strcmpic() function.
1812 (d) The code set only $1; it now sets $auth1 as well.
1813 (e) A simple test gave the error "authentication client didn't specify
1814 service in request". It would seem that Dovecot has changed its
1815 interface. Fortunately there's a specification; I followed it and
1816 changed what the client sends and it appears to be working now.
1818 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1821 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1822 address A is aliased to B and C, where B exists and C does not. Without
1823 -v the output is "A verified" because verification stops after a
1824 successful redirection if more than one address is generated. However,
1825 with -v the child addresses are also verified. Exim was outputting "A
1826 failed to verify" and then showing the successful verification for C,
1827 with its parentage. It now outputs "B failed to verify", showing B's
1828 parentage before showing the successful verification of C.
1830 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1831 look up a TXT record in a specific list after matching in a combined
1834 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1835 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1836 they consult the DNS. I had assumed they would set it the way they
1837 wanted; and indeed my experiments on Linux seem to show that in some
1838 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1839 To be on the safe side, however, I have now made the interface to
1840 host_find_byname() similar to host_find_bydns(), with an argument
1841 containing the DNS resolver options. The host_find_byname() function now
1842 sets these options at its start, just as host_find_bydns() does. The smtp
1843 transport options dns_qualify_single and dns_search_parents are passed to
1844 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1845 of host_find_byname() use the default settings of RES_DEFNAMES
1846 (qualify_single) but not RES_DNSRCH (search_parents).
1848 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1849 spool_read_header() do less string testing, by means of a preliminary
1850 switch on the second character of optional "-foo" lines. (This is
1851 overdue, caused by the large number of possibilities that now exist.
1852 Originally there were few.) While I was there, I also converted the
1853 str(n)cmp tests so they don't re-test the leading "-" and the first
1854 character, in the hope this might squeeze out yet more improvement.
1856 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1857 flag allowing group syntax was set by the header_syntax check but not
1858 turned off, possible causing trouble later; (2) The flag was not being
1859 set at all for the header_verify test, causing "group"-style headers to
1860 be rejected. I have now set it in this case, and also caused header_
1861 verify to ignore an empty address taken from a group. While doing this, I
1862 came across some other cases where the code for allowing group syntax
1863 while scanning a header line wasn't quite right (mostly, not resetting
1864 the flag correctly in the right place). These bugs could have caused
1865 trouble for malformed header lines. I hope it is now all correct.
1867 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1868 with the "reply" argument non-NULL. The code, however (which originally
1869 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1870 but it didn't always do it. This confused somebody who was copying the
1871 code for some other use. I have removed all the tests.
1873 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1874 feature that was used to support insecure browsers during the U.S. crypto
1875 embargo. It requires special client support, and Exim is probably the
1876 only MTA that supported it -- and would never use it because real RSA is
1877 always available. This code has been removed, because it had the bad
1878 effect of slowing Exim down by computing (never used) parameters for the
1879 RSA_EXPORT functionality.
1881 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1882 authenticator to fail if there's a tab character in the incoming data
1883 (there should never be unless someone is messing about, as it's supposed
1884 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1885 if the connection is using TLS or if the remote IP is the same as the
1886 local IP, and the "valid-client-cert option" if a client certificate has
1889 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1890 authenticators. This can be used for authorization after authentication
1891 succeeds. (In the case of plaintext, it servers for both authentication
1894 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1895 if any retry times were supplied.
1897 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1898 connection, where there is no client IP address to check. In this
1899 situation, the verify now always succeeds.
1901 PH/25 Applied John Jetmore's -Mset patch.
1903 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1905 PH/27 In a string expansion for a processed (not raw) header when multiple
1906 headers of the same name were present, leading whitespace was being
1907 removed from all of them, but trailing whitespace was being removed only
1908 from the last one. Now trailing whitespace is removed from each header
1909 before concatenation. Completely empty headers in a concatenation (as
1910 before) are ignored.
1912 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1913 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1915 PH/29 [Removed. This was a change that I later backed out, and forgot to
1916 correct the ChangeLog entry (that I had efficiently created) before
1917 committing the later change.]
1919 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1920 address errors (4xx response to RCPT) over the same connection as other
1921 messages routed to the same hosts. Such deliveries are always "forced",
1922 so retry times are not inspected. This resulted in far too many retries
1923 for the affected addresses. The effect occurred only when there were more
1924 hosts than the hosts_max_try setting in the smtp transport when it had
1925 the 4xx errors. Those hosts that it had tried were not added to the list
1926 of hosts for which the message was waiting, so if all were tried, there
1927 was no problem. Two fixes have been applied:
1929 (i) If there are any address or message errors in an SMTP delivery, none
1930 of the hosts (tried or untried) are now added to the list of hosts
1931 for which the message is waiting, so the message should not be a
1932 candidate for sending over the same connection that was used for a
1933 successful delivery of some other message. This seems entirely
1934 reasonable: after all the message is NOT "waiting for some host".
1935 This is so "obvious" that I'm not sure why it wasn't done
1936 previously. Hope I haven't missed anything, but it can't do any
1937 harm, as the worst effect is to miss an optimization.
1939 (ii) If, despite (i), such a delivery is accidentally attempted, the
1940 routing retry time is respected, so at least it doesn't keep
1941 hammering the server.
1943 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1944 in ${readsocket because some servers need this prod.
1946 PH/32 Added some extra debug output when updating a wait-xxx database.
1948 PH/33 The hint "could be header name not terminated by colon", which has been
1949 given for certain expansion errors for a long time, was not being given
1950 for the ${if def:h_colon_omitted{... case.
1952 PH/34 The spec says: "With one important exception, whenever a domain list is
1953 being scanned, $domain contains the subject domain." There was at least
1954 one case where this was not true.
1956 PH/35 The error "getsockname() failed: connection reset by peer" was being
1957 written to the panic log as well as the main log, but it isn't really
1958 panic-worthy as it just means the connection died rather early on. I have
1959 removed the panic log writing for the ECONNRESET error when getsockname()
1962 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1963 runs only) independently of the message's sender address. This meant
1964 that, if the 4xx error was in fact related to the sender, a different
1965 message to the same recipient with a different sender could confuse
1966 things. In particualar, this can happen when sending to a greylisting
1967 server, but other circumstances could also provoke similar problems.
1968 I have changed the default so that the retry time for these errors is now
1969 based a combination of the sender and recipient addresses. This change
1970 can be overridden by setting address_retry_include_sender=false in the
1973 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1974 remote server are returned as part of bounce messages. This was not
1975 happening for LMTP over a pipe (the lmtp transport), but now it is the
1976 same for both kinds of LMTP.
1978 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1979 in header lines that were in fact CNAMEs. This is no longer the case.
1981 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1982 and queue runs started by the daemon processed all messages. This has
1983 been fixed so that -R and -S can now usefully be given with -q<time>.
1985 PH/40 Import PCRE release 6.7 (fixes some bugs).
1987 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1989 PH/42 Give an error if -q is specified more than once.
1991 PH/43 Renamed the variables $interface_address and $interface_port as
1992 $received_ip_address and $received_port, to make it clear that these
1993 values apply to message reception, and not to the outgoing interface when
1994 a message is delivered. (The old names remain recognized, of course.)
1996 PH/44 There was no timeout on the connect() call when using a Unix domain
1997 socket in the ${readsocket expansion. There now is.
1999 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2000 be meaningful with "accept".
2002 SC/01 Eximstats V1.43
2003 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2005 SC/02 Eximstats V1.44
2006 Use a glob alias rather than an array ref in the generated
2007 parser. This improves both readability and performance.
2009 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2010 Collect SpamAssassin and rejection statistics.
2011 Don't display local sender or destination tables unless
2012 there is data to show.
2013 Added average volumes into the top table text output.
2015 SC/04 Eximstats V1.46
2016 Collect data on the number of addresses (recipients)
2017 as well as the number of messages.
2019 SC/05 Eximstats V1.47
2020 Added 'Message too big' to the list of mail rejection
2021 reasons (thanks to Marco Gaiarin).
2023 SC/06 Eximstats V1.48
2024 Mainlog lines which have GMT offsets and are too short to
2025 have a flag are now skipped.
2027 SC/07 Eximstats V1.49 (Alain Williams)
2028 Added the -emptyok flag.
2030 SC/08 Eximstats V1.50
2031 Fixes for obtaining the IP address from reject messages.
2033 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2034 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2035 whitesspace changes from 4.64-PH/27
2037 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2040 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2041 are found, allow negative numbers in numeric criteria)
2043 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2045 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2046 to match changes made in 4.64-PH/43
2048 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2050 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2051 "domain" is actually an IP address, and force a failure. This locks out
2052 those revolvers/nameservers that support "A-for-A" lookups, in
2053 contravention of the specifications.
2055 PH/48 When a host name was looked up from an IP address, and the subsequent
2056 forward lookup of the name timed out, the host name was left in
2057 $sender_host_name, contrary to the specification.
2059 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2060 restricted to single-key lookups, Exim was not diagnosing an error if
2061 * or *@ was used with a query-style lookup.
2063 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2065 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2066 long ago, but noone interested enough thought of it. Let's just say that
2067 the "1.1" means that there are some new functions that weren't there at
2068 some point in the past.
2070 PH/51 Error processing for expansion failure of helo_data from an smtp
2071 transport during callout processing was broken.
2073 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2074 tested/used via the -bh/-bhc/-bs options.
2076 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2077 bug, fixed in subsequent PCRE releases).
2079 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2080 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2082 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2088 SC/01 Use a glob alias rather than an array ref in eximstats generated
2089 parser. This improves both readability and performance.
2091 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2092 Don't display local sender or destination tables in eximstats unless
2093 there is data to show.
2094 Added average volumes into the eximstats top table text output.
2096 SC/03 Collect data on the number of addresses (recipients) as well
2097 as the number of messages in eximstats.
2099 TF/01 Correct an error in the documentation for the redirect router. Exim
2100 does (usually) call initgroups() when daemonizing.
2102 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2103 with consistent privilege compared to when running as a daemon.
2105 TF/03 Note in the spec that $authenticated_id is not set for local
2106 submissions from trusted users.
2108 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2109 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2111 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2112 by adding some example configuration directives to the default
2113 configuration file. A little bit of work is required to uncomment the
2114 directives and define how usernames and passwords are checked, but
2115 there is now a framework to start from.
2117 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2118 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2119 without this. I don't know how relevant this is to other LDAP libraries.
2121 PH/02 Add the verb name to the "unknown ACL verb" error.
2123 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2125 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2127 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2128 directory not expanded when it should be if an expanded home directory
2129 was set for the address (which is overridden by the transport).
2131 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2134 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2135 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2136 because it is too late at that time, and has no effect.
2138 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2139 security issue with \' (bugzilla #107). I could not use the
2140 PQescapeStringConn() function, because it needs a PGconn value as one of
2143 PH/08 When testing addresses using -bt, indicate those final addresses that
2144 are duplicates that would not cause an additional delivery. At least one
2145 person was confused, thinking that -bt output corresponded to deliveries.
2146 (Suppressing duplicates isn't a good idea as you lose the information
2147 about possibly different redirections that led to the duplicates.)
2149 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2150 systems where poll() doesn't work, in particular OS X.
2152 PH/10 Added more information to debugging output for retry time not reached.
2154 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2155 operations in malware.c.
2157 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2160 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2161 syslog_duplication set false, log lines that would normally be written
2162 both the the main log and to the reject log were not written to syslog at
2165 PH/14 In the default configuration, change the use of "message" in ACL warn
2166 statements to "add_header".
2168 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2169 not followed by a command (e.g. "seen endif").
2171 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2172 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2175 PH/17 Added extra conditions to the default value of delay_warning_condition
2179 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2180 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2181 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2184 The Auto-Submitted: and various List- headers are standardised, whereas I
2185 don't think Precedence: ever was.
2187 PH/18 Refactored debugging code in route_finduser() to show more information,
2188 in particular, the error code if getpwnam() issues one.
2190 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2191 This is apparently needed in addition to the PH/07 change above to avoid
2192 any possible encoding problems.
2194 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2195 but not after initializing Perl.
2197 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2198 output them only if debugging. By default they are written stderr,
2199 apparently, which is not desirable.
2201 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2204 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2207 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2209 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2210 authenticated or an ident call has been made. Suppress the default
2211 values for $authenticated_id and $authenticated_sender (but permit -oMai
2212 and -oMas) when testing with -bh.
2214 PH/24 Re-jigged the order of the tests in the default configuration so that the
2215 tests for valid domains and recipients precede the DNS black list and CSA
2216 tests, on the grounds that those ones are more expensive.
2218 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2219 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2220 This bug exists in every version of Exim that I still have, right back to
2223 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2224 However, an attempt to turn on case-sensitivity in a regex key by
2225 including (?-i) didn't work because the subject string was already
2226 lowercased, and the effects were non-intuitive. It turns out that a
2227 one-line patch can be used to allow (?-i) to work as expected.
2233 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2234 other effects) broke the use of negated acl sub-conditions.
2236 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2239 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2240 "Deny" causes Exim to reject the incoming connection with a 554 error.
2241 Unfortunately, if there is a major crisis, such as a disk failure,
2242 tcp-wrappers gives "deny", whereas what one would like would be some
2243 kind of temporary error. A kludge has been added to help with this.
2244 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2245 554 error is used if errno is still zero or contains ENOENT (which occurs
2246 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2249 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2251 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2252 errors. Otherwise a message that provokes a temporary error (when other
2253 messages do not) can cause a whole host to time out.
2255 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2256 addresses were routed directly to files or pipes from a redirect router.
2257 File deliveries just didn't batch; pipe deliveries might have suffered
2260 PH/06 A failure to get a lock for a hints database would erroneously always say
2261 "Failed to get write lock", even when it was really a read lock.
2263 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2264 of 0600. This has been changed to use the value of the lockfile_mode
2265 option (which defaults to 0600).
2267 PH/08 Applied small patch from the Sieve maintainer.
2269 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2270 folder from quota calculations, a direct delivery into this folder messed
2271 up the contents of the maildirsize file. This was because the regex was
2272 used only to exclude .Trash (or whatever) when the size of the mailbox
2273 was calculated. There was no check that a delivery was happening into an
2274 excluded directory. This bug has been fixed by ignoring all quota
2275 processing for deliveries into excluded directories.
2277 PH/10 Added the maildirfolder_create_regex option to appendfile.
2283 PH/01 The code for finding all the local interface addresses on a FreeBSD
2284 system running IPv6 was broken. This may well have applied to all BSD
2285 systems, as well as to others that have similar system calls. The broken
2286 code found IPv4 interfaces correctly, but gave incorrect values for the
2287 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2288 that it would not match correctly against @[] and not recognize the IPv6
2291 PH/02 The ipliteral router was not recognizing addresses of the form user@
2292 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2294 PH/03 Added disable_ipv6.
2296 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2297 decoded form, because it is most often used to construct To: headers
2298 lines in autoreplies, and the decoded form may well be syntactically
2299 invalid. However, $reply_address has leading white space removed, and all
2300 newlines turned into spaces so that the autoreply transport does not
2303 PH/05 If group was specified without a user on a router, and no group or user
2304 was specified on a transport, the group from the router was ignored.
2306 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2307 for visible compile-time settings that can be used to change these
2308 numbers, for those that want even more. Backwards compatibility with old
2309 spool files has been maintained. However, going back to a previous Exim
2310 release will lost any variables that are in spool files.
2312 PH/07 Two small changes when running in the test harness: increase delay when
2313 passing a TCP/IP connection to a new process, in case the original
2314 process has to generate a bounce, and remove special handling of
2315 127.0.0.2 (sic), which is no longer necessary.
2317 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2318 be the same on different OS.
2320 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2323 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2324 whether --show-vars was specified or not
2326 JJ/02 exipick: Added support for new ACL variable spool format introduced
2329 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2330 syntactically invalid From: or Reply-to: line, and a filter used this to
2331 generate an autoreply, and therefore failed to obtain an address for the
2332 autoreply, Exim could try to deliver to a non-existent relative file
2333 name, causing unrelated and misleading errors. What now happens is that
2334 it logs this as a hard delivery error, but does not attempt to create a
2337 PH/11 The exinext utility has a -C option for testing purposes, but although
2338 the given file was scanned by exinext itself; it wasn't being passed on
2339 when Exim was called.
2341 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2342 an end-of-file indication when reading a command response.
2344 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2345 compiled. In many other places in Exim, IPv6 addresses are always
2346 recognized, so I have changed this. It also means that IPv4 domain
2347 literals of the form [IPV4:n.n.n.n] are now always recognized.
2349 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2350 used if the router is not running as root, for example, when verifying at
2351 ACL time, or when using -bh. The debugging output from this situation was
2352 non-existent - all you got was a failure to exec. I have made two
2355 (a) Failures to set uid/gid, the current directory, or a process leader
2356 in a subprocess such as that created by queryprogram now generate
2357 suitable debugging ouput when -d is set.
2359 (b) The queryprogram router detects when it is not running as root,
2360 outputs suitable debugging information if -d is set, and then runs
2361 the subprocess without attempting to change uid/gid.
2363 PH/15 Minor change to Makefile for building test_host (undocumented testing
2366 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2367 additional section of a DNS packet that returns MX or SRV records.
2368 Instead, it always explicitly searches for A/AAAA records. This avoids
2369 major problems that occur when a DNS server includes only records of one
2370 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2371 fixed another bug: if SRV records were looked up and the corresponding
2372 address records were *not* found in the additional section, the port
2373 values from the SRV records were lost.
2375 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2376 using the correct key (the original address) when searching the retry
2377 rules in order to find which one to use for generating the retry hint.
2379 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2380 adding the default one. Similarly, if it contains a Reply-To: header, the
2381 errors_reply_to option, if set, is not used.
2383 PH/19 When calculating a retry time, Exim used to measure the "time since
2384 failure" by looking at the "first failed" field in the retry record. Now
2385 it does not use this if it is later than than the arrival time of the
2386 message. Instead it uses the arrival time. This makes for better
2387 behaviour in cases where some deliveries succeed, thus re-setting the
2388 "first failed" field. An example is a quota failure for a huge message
2389 when small messages continue to be delivered. Without this change, the
2390 "time since failure" will always be short, possible causing more frequent
2391 delivery attempts for the huge message than are intended.
2392 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2394 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2395 $1, $2, $3) because the numerical variables can be reset during some
2396 expansion items (e.g. "match"), thereby losing the authentication data.
2398 PH/21 Make -bV show the size of off_t variables so that the test suite can
2399 decide whether to run tests for quotas > 2G.
2401 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2402 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2403 filecount value is greater than 2G or if a quota value is greater than 2G
2404 on a system where the size of off_t is not greater than 4, a panic error
2407 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2408 never match. The debug and -bh output now contains an explicit error
2409 message indicating a malformed IPv4 address or mask.
2411 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2412 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2413 PH/23 above applies.
2415 PH/25 Do not write to syslog when running in the test harness. The only
2416 occasion when this arises is a failure to open the main or panic logs
2417 (for which there is an explicit test).
2419 PH/26 Added the /no_tell option to "control=freeze".
2421 PH/27 If a host name lookup failed very early in a connection, for example, if
2422 the IP address matched host_lookup and the reverse lookup yielded a name
2423 that did not have a forward lookup, an error message of the form "no IP
2424 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2425 could be logged. Now it outputs the IP address instead of "NULL".
2427 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2428 allows the sender and the authenticated sender to be set when
2429 submitting a message from within Exim. Since child_open_exim() is
2430 documented for local_scan(), the new function should be too.
2432 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2433 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2434 results in an empty string is now treated as unset.
2436 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2438 PH/31 Added sender_verify_fail logging option.
2440 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2441 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2442 tidied the source and removed it altogether.
2444 PH/33 When a queue run was abandoned because the load average was too high, a
2445 log line was always written; now it is written only if the queue_run log
2446 selector is set. In addition, the log line for abandonment now contains
2447 information about the queue run such as the pid. This is always present
2448 in "start" and "stop" lines but was omitted from the "abandon" line.
2450 PH/34 Omit spaces between a header name and the colon in the error message that
2451 is given when verify = headers_syntax fails (if there are lots of them,
2452 the message gets confusing).
2454 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2455 names, as there are now some PTR records that contain slashes. This check
2456 is only to protect against broken name servers that fall over on strange
2457 characters, so the fact that it applies to all lookups doesn't matter.
2459 PH/36 Now that the new test suite is complete, we can remove some of the
2460 special code in Exim that was needed for the old test suite. For example,
2461 sorting DNS records because real resolvers return them in an arbitrary
2462 order. The new test suite's fake resolver always returns records in the
2465 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2466 bounces) except when queue_only is set, to avoid logging races between
2467 the different processes.
2469 PH/38 Panic-die if .include specifies a non-absolute path.
2471 PH/39 A tweak to the "H" retry rule from its user.
2473 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2474 a label. They prevented compilation on older perls.
2476 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2477 a warning to be raised on newish perls.
2479 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2480 on queue. Changes to match documented behaviour of showing count of
2481 messages matching specified criteria.
2483 PH/40 Changed the default ident timeout from 30s to 5s.
2485 PH/41 Added support for the use of login_cap features, on those BSD systems
2486 that have them, for controlling the resources used by pipe deliveries.
2488 PH/42 The content-scanning code uses fopen() to create files in which to put
2489 message data. Previously it was not paying any attention to the mode of
2490 the files. Exim runs with umask(0) because the rest of the code creates
2491 files with open(), and sets the required mode explicitly. Thus, these
2492 files were ending up world-writeable. This was not a big issue, because,
2493 being within the spool directory, they were not world-accessible. I have
2494 created a function called modefopen, which takes an additional mode
2495 argument. It sets umask(777), creates the file, chmods it to the required
2496 mode, then resets the umask. All the relevant calls to fopen() in the
2497 content scanning code have been changed to use this function.
2499 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2500 to 24 hours. This avoids potential overflow problems when processing G
2501 and H retry rules. I suspect nobody ever tinkers with this value.
2503 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2505 PH/45 When the plaintext authenticator is running as a client, the server's
2506 challenges are checked to ensure they are valid base64 strings. By
2507 default, the authentication attempt is cancelled if an invalid string is
2508 received. Setting client_ignore_invalid_base64 true ignores these errors.
2509 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2510 they are received. Thus, the responses can be made to depend on the
2511 challenges. If an invalid string is ignored, an empty string is placed in
2514 PH/46 Messages that are created by the autoreply transport now contains a
2515 References: header, in accordance with RFCs 2822 and 3834.
2517 PH/47 Added authenticated_sender_force to the smtp transport.
2519 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2521 PH/49 Installed latest patch from the Sieve maintainer.
2523 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2524 was also set, the appendfile transport was unnecessarily scanning a
2525 directory of message files (e.g. for maildir delivery) to find the count
2526 of files (along with the size), even though it did not need this
2527 information. It now does the scan only if it needs to find either the
2528 size of the count of files.
2530 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2532 PH/52 Two bugs concerned with error handling when the smtp transport is
2535 (i) Exim was not creating retry information for temporary errors given
2536 for individual recipients after the DATA command when the smtp transport
2537 was used in LMTP mode. This meant that they could be retried too
2538 frequently, and not timed out correctly.
2540 (ii) Exim was setting the flag that allows error details to be returned
2541 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2542 recipients that were returned after the DATA command.
2544 PH/53 This is related to PH/52, but is more general: for any failing address,
2545 when detailed error information was permitted to be returned to the
2546 sender, but the error was temporary, then after the final timeout, only
2547 "retry timeout exceeded" was returned. Now it returns the full error as
2548 well as "retry timeout exceeded".
2550 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2551 do this, and (what is worse) MTAs that accept it.
2553 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2554 will now be deprecated.
2556 PH/56 New os.c-cygwin from the Cygwin maintainer.
2558 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2559 formats (previously only available in exim formats via -bpr, -bpru,
2560 and -bpra. Now also available in native and exiqgrep formats)
2562 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2563 with very large, slow to parse queues
2565 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2567 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2569 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2570 responses to authentication challenges, though it was showing the
2571 challenges; (ii) I've removed the CR characters from the debug output for
2574 PH/58 Allow for the insertion of a newline as well as a space when a string
2575 is turned into more than one encoded-word during RFC 2047 encoding. The
2576 Sieve code now uses this.
2578 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2579 data_4xx, lost_connection, tls_required.
2581 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2582 message was being sent as an SMTP response.
2584 PH/61 Add -l and -k options to exicyclog.
2586 PH/62 When verifying, if an address was redirected to one new address, so that
2587 verification continued, and the new address failed or deferred after
2588 having set something in $address_data, the value of $address_data was not
2589 passed back to the ACL. This was different to the case when no
2590 redirection occurred. The value is now passed back in both cases.
2592 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2593 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2594 use login_cap.h, so on its own it isn't the distinguishing feature. The
2595 new name refers directly to the setclassresources() function.
2597 PH/65 Added configuration files for NetBSD3.
2599 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2601 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2602 is preferred over IPv4.
2604 PH/68 The bounce_return_message and bounce_return_body options were not being
2605 honoured for bounces generated during the reception of non-SMTP messages.
2606 In particular, this applied to messages rejected by the ACL. This bug has
2607 been fixed. However, if bounce_return_message is true and bounce_return_
2608 body is false, the headers that are returned for a non-SMTP message
2609 include only those that have been read before the error was detected.
2610 (In the case of an ACL rejection, they have all been read.)
2612 PH/69 The HTML version of the specification is now built in a directory called
2613 spec_html instead of spec.html, because the latter looks like a path with
2614 a MIME-type, and this confuses some software.
2616 PH/70 Catch two compiler warnings in sieve.c.
2618 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2619 function verify_get_ident() calls ip_connect() to connect a socket, but
2620 if the "connect()" function timed out, ip_connect() used to close the
2621 socket. However, verify_get_ident() also closes the socket later, and in
2622 between Exim writes to the log, which may get opened at this point. When
2623 the socket was closed in ip_connect(), the log could get the same file
2624 descriptor number as the socket. This naturally causes chaos. The fix is
2625 not to close the socket in ip_connect(); the socket should be closed by
2626 the function that creates it. There was only one place in the code where
2627 this was missing, in the iplookup router, which I don't think anybody now
2628 uses, but I've fixed it anyway.
2630 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2631 well as to direct DNS lookups. Otherwise the handling of names in host
2632 lists is inconsistent and therefore confusing.
2638 PH/01 Two changes to the default runtime configuration:
2640 (1) Move the checks for relay_from_hosts and authenticated clients from
2641 after to before the (commented out) DNS black list checks.
2643 (2) Add control=submission to the relay_from_hosts and authenticated
2644 clients checks, on the grounds that messages accepted by these
2645 statements are most likely to be submissions.
2647 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2649 (1) Generate an error if the third argument for the ${prvs expansion is
2652 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2655 (3) Reset the variables that are obtained from the first argument of
2656 ${prvscheck and used in the second argument before leaving the code,
2657 because their memory is reclaimed, so using them afterwards may do
2660 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2661 one (it's much easier than Tom thought :-).
2663 (5) Because of (4), we can now allow for the use of $prvscheck_result
2664 inside the third argument.
2666 PH/03 For some reason, the default setting of PATH when running a command from
2667 a pipe transport was just "/usr/bin". I have changed it to
2670 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2671 anything to be listed in the output from -bV.
2673 PH/05 When a filter generated an autoreply, the entire To: header line was
2674 quoted in the delivery log line, like this:
2676 => >A.N.Other <ano@some.domain> <original@ddress> ...
2678 This has been changed so that it extracts the operative address. There
2679 may be more than one such address. If so, they are comma-separated, like
2682 => >ano@some.domain,ona@other.domain <original@ddress> ...
2684 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2685 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2686 not being looked up in the rDNS to get a host name, Exim was showing the
2687 IP address twice in Received: lines, even though the IP addresses were
2688 identical. For example:
2690 Received: from [1.2.3.4] (helo=[1.2.3.4])
2692 However, if the real host name was known, it was omitting the HELO data
2693 if it matched the actual IP address. This has been tidied up so that it
2694 doesn't show the same IP address twice.
2696 PH/07 When both +timestamp and +memory debugging was on, the value given by
2697 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2698 called by the debug printing, thereby overwriting the timestamp buffer.
2699 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2701 PH/08 When the original message was included in an autoreply transport, it
2702 always said "this is a copy of the message, including all the headers",
2703 even if body_only or headers_only was set. It now gives an appropriate
2706 PH/09 Applied a patch from the Sieve maintainer which:
2708 o fixes some comments
2709 o adds the (disabled) notify extension core
2710 o adds some debug output for the result of if/elsif tests
2711 o points to the current vacation draft in the documentation
2712 and documents the missing references header update
2716 o fixes a bug in processing the envelope test (when testing
2717 multiple envelope elements, the last element determinted the
2720 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2721 Electronic Mail") by including:
2723 Auto-submitted: auto-generated
2725 in the messages that it generates (bounce messages and others, such as
2726 warnings). In the case of bounce messages for non-SMTP mesages, there was
2727 also a typo: it was using "Auto_submitted" (underscore instead of
2728 hyphen). Since every message generated by Exim is necessarily in response
2729 to another message, thes have all been changed to:
2731 Auto-Submitted: auto-replied
2733 in accordance with these statements in the RFC:
2735 The auto-replied keyword:
2737 - SHOULD be used on messages sent in direct response to another
2738 message by an automatic process,
2740 - MUST NOT be used on manually-generated messages,
2742 - MAY be used on Delivery Status Notifications (DSNs) and Message
2743 Disposition Notifications (MDNs),
2745 - MUST NOT be used on messages generated by automatic or periodic
2746 processes, except for messages which are automatic responses to
2749 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2750 to the default Received: header definition.
2752 PH/12 Added log selector acl_warn_skipped (default on).
2754 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2755 variables because (a) they are in the wrong storage pool and (b) even if
2756 they were copied, it wouldn't work properly because of the caching.
2758 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2759 checking when decoding. Apparently there are clients that generate
2760 overlong encoded strings. Why am I not surprised?
2762 PH/15 If the first argument of "${if match_address" was not empty, but did not
2763 contain an "@" character, Exim crashed. Now it writes a panic log message
2764 and treats the condition as false.
2766 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2768 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2769 extension "envelope-auth". The code is finished and in agreement with
2770 other implementations, but there is no documentation so far and in fact,
2771 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2772 not changing the active code.
2774 Print executed "if" and "elsif" statements when debugging is used. This
2775 helps a great deal to understand what a filter does.
2777 Document more things not specified clearly in RFC3028. I had all this
2778 sorted out, when out of a sudden new issues came to my mind. Oops."
2780 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2783 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2784 canonical form (as documented). However, after a host name lookup from
2785 the IP address, check_host() was doing a simple string comparison with
2786 addresses acquired from the DNS when checking that the found name did
2787 have the original IP as one of its addresses. Since any found IPv6
2788 addresses are likely to be in abbreviated form, the comparison could
2789 fail. Luckily, there already exists a function for doing the comparison
2790 by converting both addresses to binary, so now that is used instead of
2791 the text comparison.
2793 PH/20 There was another similar case to PH/19, when a complete host name was
2794 given in a host list; looking up its IP address could give an abbreviated
2795 form, whereas the current host's name might or might not be abbreviated.
2796 The same fix has been applied.
2802 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2803 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2806 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2807 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2809 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2811 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2812 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2813 Also, for "Auto-Submitted", treat anything other than "no" as
2814 non-personal, in accordance with RFC 3834. (Previously it treated
2815 anything starting "auto-" as non-personal.)
2817 TF/01 The control=submission/name=... option had a problem with syntax
2818 errors if the name included a slash character. The /name= option
2819 now slurps the rest of the string, so it can include any characters
2820 but it must come last in the list of options (after /sender_retain
2823 PH/05 Some modifications to the interface to the fake nameserver for the new
2831 TK/01 Added the "success_on_redirect" address verification option. See
2832 NewStuff for rationale and an example.
2834 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2836 PH/02 Patch to exigrep to allow it to work on syslog lines.
2838 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2839 fread() to skip over the body file's header line, because in Cygwin the
2840 header line is locked and is inaccessible.
2842 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2843 co-exist for some time) to make it clear that it is the Exim ID that is
2844 referenced, not the Message-ID: header line.
2846 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2847 string_format() function, because snprintf() does not exist on all
2850 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2851 ${stat: expansion item.
2853 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2854 protocol synchronization error", to keep the pedants happy.
2856 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2857 well as for IRIX systems, when gcc is being used. See the host.c source
2860 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2862 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2865 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2866 transport and to the smtp transport in LMTP mode.
2868 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2870 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2871 run a filter in a subprocess. This could lead to confusion in subsequent
2872 lookups in the parent process. There should also be a search_tidyup() at
2873 the end of the subprocess.
2875 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2876 only if the host matched helo_try_verify_hosts, which caused the
2877 verification to occur when the EHLO/HELO command was issued. The ACL just
2878 tested the remembered result. Now, if a previous verification attempt has
2879 not happened, "verify = helo" does it there and then.
2881 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2883 TK/03 Fix log output including CR from clamd.
2885 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2886 exist provoked a memory error which could cause a segfault.
2888 PH/15 Installed PCRE 6.2
2890 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2892 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2893 of the problem. Specifically, suggested +O2 rather than +O1 for the
2896 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2898 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2899 record, the port was not correctly logged when the outgoing_port log
2900 selector was set (it logged the transort's default port).
2902 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2903 fallback_hosts, and "hosts" in the smtp transport.
2905 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2906 host errors such as "Connection refused".
2908 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2909 authentication with radiusclient 0.4.9:
2911 - Error returned from rc_read_config was caught wrongly
2912 - Username/password not passed on to radius server due to wrong length.
2914 The presumption is that some radiusclient API changes for 4.51/PH/17
2915 were not taken care of correctly. The code is still untested by me (my
2916 Linux distribution still has 0.3.2 of radiusclient), but it was
2917 contributed by a Radius user.
2919 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2920 expanding the "port" option of the smtp transport.
2922 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2923 while reading a MIME header. Thanks to Tom Hughes for a patch.
2925 PH/24 Include config.h inside local_scan.h so that configuration settings are
2928 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2929 that in an ACL for RCPT (for example), you can examine exactly what was
2932 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2933 commands, but it was not correctly comparing the address with the actual
2934 client host address. Thus, it would show the EHLO address in Received:
2935 header lines when this was not necessary.
2937 PH/27 Added the % operator to ${eval:}.
2939 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2940 it should be ignoring failures (because with -C, for example, it has lost
2941 privilege). It wasn't ignoring creation failures other than "already
2944 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2947 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2948 because an input line was too long, either on its own, or by virtue of
2949 too many continuations, the temporary file was not being removed, and the
2950 return code was incorrect.
2952 PH/31 Missing "BOOL" in function definition in filtertest.c.
2954 PH/32 Applied Sieve patches from the maintainer.
2956 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2958 PH/33 Added "verify = not_blind".
2960 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2961 Local/Makefile (with some defaults set). These are used in built scripts
2962 such as exicyclog, but they have never been used in the exim_install
2963 script (though there are many overriding facilities there). I have
2964 arranged that the exim_install script now takes note of these two
2967 PH/35 Installed configuration files for Dragonfly.
2969 PH/36 When a locally submitted message by a trusted user did not contain a
2970 From: header, and the sender address was obtained from -f or from an SMTP
2971 MAIL command, and the trusted user did not use -F to supply a sender
2972 name, $originator_name was incorrectly used when constructing a From:
2973 header. Furthermore, $originator_name was used for submission mode
2974 messages from external hosts without From: headers in a similar way,
2975 which is clearly wrong.
2977 PH/37 Added control=suppress_local_fixups.
2979 PH/38 When log_selector = +received_sender was set, and the addition of the
2980 sender made the log line's construction buffer exactly full, or one byte
2981 less than full, an overflow happened when the terminating "\n" was
2984 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2985 when the result of a list match is failure because a DNS lookup failed.
2987 PH/40 RM_COMMAND is now used in the building process.
2989 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2990 the "build-* directories that it finds.
2992 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2993 address in a domain literal was a prefix of an interface address.
2995 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2996 when verifying a sender address, unless rewrite_headers is false.
2998 PH/44 Wrote a long comment about why errors_to addresses are verified as
2999 recipients, not senders.
3001 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3002 the ratelimit ACL was added.
3004 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3006 PH/46 Added extra information about PostgreSQL errors to the error string.
3008 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3009 avoiding the need to install special zones in a real server. This is
3010 backwards compatible; if it can't find the fake resolver, it drops back.
3011 Thus, both old and new test suites can be run.
3013 TF/02 Added util/ratelimit.pl
3015 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3016 clock is set back in time.
3018 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3019 Candler <B.Candler@pobox.com>.
3021 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3022 OK for addresses that are the result of redirections.
3024 PH/48 A number of further additions for the benefit of the new test suite,
3025 including a fake gethostbyname() that interfaces to the fake DNS resolver
3028 TF/06 The fix for widen_domains has also been applied to qualify_single and
3029 search_parents which are the other dnslookup options that can cause
3032 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3035 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3037 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3038 service" if it encountered an MX record with an empty target hostname.
3039 The message is now "an MX or SRV record indicated no SMTP service".
3041 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3042 if the DNS of the sending site is misconfigured. This is quite a
3043 common situation. This change restores the behaviour of treating a
3044 helo verification defer as a failure.
3046 PH/51 If self=fail was set on a router, the bounce message did not include the
3047 actual error message.
3053 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3055 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3056 command itself ended in error, the underlying message about the transport
3057 filter timeout was being overwritten with the pipe command error. Now the
3058 underlying error message should be appended to the second error message.
3060 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3062 PH/02 Reduce the amount of output that "make" produces by default. Full output
3063 can still be requested.
3065 PH/03 The warning log line about a condition test deferring for a "warn" verb
3066 was being output only once per connection, rather than after each
3067 occurrence (because it was using the same function as for successful
3068 "warn" verbs). This seems wrong, so I have changed it.
3070 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3071 it should not have, which might have caused a crash in the right
3072 circumstances, but probably never did.
3074 PH/04 Installed a modified version of Tony Finch's patch to make submission
3075 mode fix the return path as well as the Sender: header line, and to
3076 add a /name= option so that you can make the user's friendly name appear
3079 TF/03 Added the control = fakedefer ACL modifier.
3081 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3082 Mark Lowes for thorough testing.
3084 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3086 TK/03 Merged latest SRS patch from Miles Wilton.
3088 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3089 with the definition in sysexits.h (which is #included earlier).
3090 Fortunately, Exim does not actually use EX_OK. The code used to try to
3091 preserve the sysexits.h value, by assumimg that macro definitions were
3092 scanned for macro replacements. I have been disabused of this notion,
3093 so now the code just undefines EX_OK before #including unistd.h.
3095 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3096 in the smtp transport. When a block could not be written in a single
3097 write() function, the timeout was being re-applied to each part-write.
3098 This seems wrong - if the receiver was accepting one byte at a time it
3099 would take for ever. The timeout is now adjusted when this happens. It
3100 doesn't have to be particularly precise.
3102 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3103 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3105 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3106 without a domain if the check to <postmaster@domain> fails.
3108 SC/01 Eximstats: added -xls and the ability to specify output files
3109 (patch written by Frank Heydlauf).
3111 SC/02 Eximstats: use FileHandles for outputing results.
3113 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3115 SC/04 Eximstats: fixed display of large numbers with -nvr option
3117 SC/05 Eximstats: fixed merging of reports with empty tables.
3119 SC/06 Eximstats: added the -include_original_destination flag
3121 SC/07 Eximstats: removed tabs and trailing whitespace.
3123 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3125 TK/06 MBOX spool code: Add real "From " MBOX separator line
3126 so the .eml file is really in mbox format (even though
3127 most programs do not really care). Patch from Alex Miller.
3129 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3130 The latter is generated from $received_to and is only set if the
3131 message has one envelope recipient. SA can use these headers,
3132 obviously out-of-the-box. Patch from Alex Miller.
3134 PH/08 The ${def test on a variable was returning false if the variable's
3135 value was "0", contrary to what the specification has always said!
3136 The result should be true unless the variable is empty.
3138 PH/09 The syntax error of a character other than { following "${if
3139 def:variable_name" (after optional whitespace) was not being diagnosed.
3140 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3141 accidental colon was present, for example, could give incorrect results.
3143 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3144 result is used (not including appendfile, where other changes are about
3147 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3148 This involved changing a lot of size variables from int to off_t. It
3149 should work with maildirs and everything.
3151 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3152 spamd dying while we are connected to it.
3154 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3157 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3158 function for BDB 4.3.
3160 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3162 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3163 the sources for PCRE have been re-arranged and more files are now
3166 PH/15 The code I had for printing potentially long long variables in PH/11
3167 above was not the best (it lost precision). The length of off_t variables
3168 is now inspected at build time, and an appropriate printing format (%ld
3169 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3170 to be "long long int" or "long int". This is needed for the internal
3171 formatting function string_vformat().
3173 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3174 the configuration file to be ":syslog", then the script "guesses" where
3175 the logs files are, rather than using the compiled in default. In our
3176 case the guess is not the same as the compiled default, so the script
3177 suddenly stopped working when I started to use syslog. The patch checks
3178 to see if log_file_path is "". If so, it attempts to read it from exim
3179 with no configuration file to get the compiled in version, before it
3180 falls back to the previous guessing code."
3182 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3183 implementing BATV in an Exim configuration. See NewStuff for the gory
3186 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3187 Makefile that are specific to HP-UX.
3189 PH/18 If the "use_postmaster" option was set for a recipient callout together
3190 with the "random" option, the postmaster address was used as the MAIL
3191 FROM address for the random test, but not for the subsequent recipient
3192 test. It is now used for both.
3194 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3195 patch removes a few documentation additions to RFC 3028, because the
3196 latest draft now contains them. It adds the new en;ascii-case comparator
3197 and a new error check for 8bit text in MIME parts. Comparator and
3198 require names are now matched exactly. I enabled the subaddress
3199 extension, but it is not well tested yet (read: it works for me)."
3201 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3202 rework some of the code of TK/09 above to avoid the hardwired use of
3203 "%lld" and "long long". Replaced the call to snprintf() with a call to
3206 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3207 records point to non-existent hosts", "retry timeout exceeded", and
3208 "retry time not reached for any host after a long failure period".
3210 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3211 experimental DomainKeys support:
3213 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3214 (2) On an error such as an illegally used "control", the wrong name for
3215 the control was given.
3217 These problems did NOT occur unless DomainKeys support was compiled.
3219 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3221 PH/24 Added ${if match_ip condition.
3223 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3224 databases so that it will be absolutely obvious if a crash occurs in the
3225 DB library. This is a regular occurrence (often caused by mis-matched
3228 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3229 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3230 picked up on a user's system that detects such things. There doesn't seem
3231 to be a gcc warning option for this - only an attribute that has to be
3232 put on the function's prototype. It seems that in Fedora Core 4 they have
3233 set this on a number of new functions. No doubt there will be more in due
3236 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3237 specify a transport. However, if an address that was verified by such a
3238 router was the subject of a callout, Exim crashed because it tried to
3239 read the rcpt_include_affixes from the non-existent transport. Now it
3240 just assumes that the setting of that option is false. This bug was
3241 introduced by 4.51/PH/31.
3243 PH/28 Changed -d+all to exclude +memory, because that information is very
3244 rarely of interest, but it makes the output a lot bigger. People tend to
3245 do -d+all out of habit.
3247 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3248 code in os-type was giving problems when libc.so lives in lib64, like on
3251 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3252 aren't the modern standard, and it seems that some systems' include files
3253 don't always have them. Exim was already checking for some of the newer
3254 ones like T_AAAA, and defining it itself. I've added checks for all the
3255 record types that Exim uses.
3257 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3258 not automatically generating a new one, as it is supposed to. This
3259 prevented TLS from working. If the file did exist, but contained invalid
3260 data, a new version was generated, as expected. It was only the case of a
3261 non-existent file that was broken.
3263 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3264 with a change in libdomainkeys > 0.64.
3266 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3267 from DNS. If the selector record carries the flag, it now has
3268 precedence over the domain-wide flag.
3270 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3272 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3273 the use of a port name that isn't defined in /etc/services) occurred, the
3274 message was deferred as in a normal delivery, and thus remained on the
3275 spool, instead of being failed because of the mua_wrapper setting. This
3276 is now fixed, and I tidied up some of the mua_wrapper messages at the
3279 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3280 the messages in a hash of arrays rather than using individual hashes.
3281 This is a bit cleaner and results in dramatic memory savings, albeit
3282 at a slight CPU cost.
3284 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3285 as requested by Marc Sherman.
3287 SC/10 Eximstats: added histograms for user specified patterns as requested
3290 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3292 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3293 fopen() in the content-scanning modules that did not already have it.
3299 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3300 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3302 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3304 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3306 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3307 to test Sieve filters that use "vacation".
3309 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3310 that changes the way the GnuTLS parameters are stored in the cache file.
3311 The new format can be generated externally. For backward compatibility,
3312 if the data in the cache doesn't make sense, Exim assumes it has read an
3313 old-format file, and it generates new data and writes a new file. This
3314 means that you can't go back to an older release without removing the
3317 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3318 work if there are any delivery delays because "one_time" forces the
3319 parent to be marked "delivered", so its unseen clone is never tried
3320 again. For this reason, Exim now forbids the simultaneous setting of
3323 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3324 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3325 entry if you want to know the details. The fix, however, neglected to
3326 consider the case when local delivery batching is involved. The test for
3327 "previously delivered" was not happening when checking to see if an
3328 address could be batched with a previous (undelivered) one; under
3329 certain circumstances this could lead to multiple deliveries to the same
3332 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3333 in its include files, and this causes problems building Exim.
3335 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3336 header_syntax) but Exim was just ignoring anything given after a slash.
3337 In particular, this caused confusion with an attempt to use "verify =
3338 reverse_host_lookup/defer_ok". An error is now given when options are
3339 supplied for verify items that do not have them. (Maybe reverse_host_
3340 lookup should have a defer_ok option, but that's a different point.)
3342 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3343 defined by RFC 821) to 2048, because there were problems with some AUTH
3344 commands, and RFC 1869 says the size should be increased for extended
3345 SMTP commands that take arguments.
3347 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3350 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3351 "unknown" error; now it says that the functionality isn't in the binary.
3353 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3354 an address' error message when a string expansion fails (syntax or
3355 whatever). Otherwise the password may appear in the log. Following change
3356 PH/42 below, there is no longer a chance of it appearing in a bounce
3359 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3361 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3362 of its addresses was ever tried. (Bugzilla bug #2.)
3364 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3365 the result incorrectly in the debug output. (It correctly added a newline
3366 to what was transported.)
3368 TF/01 Added $received_time.
3370 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3371 commented out examples of how to interface to a virus scanner and to
3372 SpamAssassin. Also added commented examples of av_scanner and
3373 spamd_address settings.
3375 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3376 and controls are allowed in which ACLs. There were a couple of minor
3377 errors. Some of the entries in the conditions table (which is a table of
3378 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3379 negation of where the condition IS allowed.
3381 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3383 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3384 header file does not have a version number, so I've had to invent a new
3385 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3386 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3387 radiusclient), but it was contributed by a Radius user.
3389 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3390 files or directories, for OpenSSL.
3392 PH/19 When an Exim process that is running as root has to create an Exim log
3393 file, it does so in a subprocess that runs as exim:exim so as to get the
3394 ownership right at creation (otherwise, other Exim processes might see
3395 the file with the wrong ownership). There was no test for failure of this
3396 fork() call, which would lead to the process getting stuck as it waited
3397 for a non-existent subprocess. Forks do occasionally fail when resources
3398 run out. I reviewed all the other calls to fork(); they all seem to check
3401 PH/20 When checking for unexpected SMTP input at connect time (before writing
3402 the banner), Exim was not dealing correctly with a non-positive return
3403 from the read() function. If the client had disconnected by this time,
3404 the result was a log entry for a synchronization error with an empty
3405 string after "input=" when read() returned zero. If read() returned -1
3406 (an event I could not check), uninitialized data bytes were printed.
3407 There were reports of junk text (parts of files, etc) appearing after
3410 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3412 PH/22 Added support for macro redefinition, and (re)definition in between
3413 driver and ACL definitions.
3415 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3416 forgetting to use the resulting value; it was using the unexpanded value.
3418 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3419 hadn't been configured. The fix is from Juergen Kreileder, who
3420 understands it better than I do:
3422 "Here's what I see happening with three configured cyrus_sasl
3423 authenticators configured (plain, login, cram-md5):
3425 On startup auth_cyrus_sasl_init() gets called for each of these.
3426 This means three calls to sasl_listmech() without a specified mech_list.
3427 => SASL tests which mechs of all available mechs actually work
3428 => three warnings about OTP not working
3429 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3431 With the patch, sasl_listmech() also gets called three times. But now
3432 SASL's mech_list option is set to the server_mech specified in the the
3433 authenticator. Or in other words, the answer from sasl_listmech()
3434 gets limited to just the mech you're testing for (which is different
3436 => the return list contains just 'plain' or 'login', 'cram-md5' or
3437 nothing depending on the value of ob->server_mech.
3439 I've just tested the patch: Authentication still works fine,
3440 unavailable mechs specified in the exim configuration are still
3441 caught, and the auth.log warnings about OTP are gone."
3443 PH/25 When debugging is enabled, the contents of the command line are added
3444 to the debugging output, even when log_selector=+arguments is not
3447 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3448 answer is "GNU", and only if the return is "GNU/something" is the answer
3451 PH/27 $acl_verify_message is now set immediately after the failure of a
3452 verification in an ACL, and so is available in subsequent modifiers. In
3453 particular, the message can be preserved by coding like this:
3455 warn !verify = sender
3456 set acl_m0 = $acl_verify_message
3458 Previously, $acl_verify_message was set only while expanding "message"
3459 and "log_message" when a very denied access.
3461 PH/28 Modified OS/os.c-Linux with
3463 -#ifndef OS_LOAD_AVERAGE
3464 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3466 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3467 nomenclature these days.)
3469 PH/29 Installed patch from the Sieve maintainer that adds the options
3470 sieve_useraddress and sieve_subaddress to the redirect router.
3472 PH/30 In these circumstances:
3473 . Two addresses routed to the same list of hosts;
3474 . First host does not offer TLS;
3475 . First host accepts first address;
3476 . First host gives temporary error to second address;
3477 . Second host offers TLS and a TLS session is established;
3478 . Second host accepts second address.
3479 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3480 and peerdn, if requested) that were in fact used only for the second
3483 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3484 attention to any local part prefix or suffix that was matched by the
3485 router that accepted the address. It now behaves in the same way as it
3486 does for delivery: the affixes are removed from the local part unless
3487 rcpt_include_affixes is set on the transport.
3489 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3490 timeout during the DATA phase of an incoming message.
3492 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3493 applied a patch sanctioned by the Sieve maintainer.
3495 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3496 the uid or gid is negative. A case of a negative gid caused this to be
3497 noticed. The fix allows for either to be negative.
3499 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3500 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3503 PH/36 The change PH/12 above was broken. Fixed it.
3505 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3506 the grounds that routing the same address twice would always produce the
3507 same answer. This might have been true once, but it is certainly no
3508 longer true now. Routing a child address may depend on the previous
3509 routing that produced that child. Some complicated redirection strategies
3510 went wrong when messages had multiple recipients, and made Exim's
3511 behaviour dependent on the order in which the addresses were given.
3513 I have moved the duplicate checking until after the routing is complete.
3514 Exim scans the addresses that are assigned to local and remote
3515 transports, and removes any duplicates. This means that more work will be
3516 done, as duplicates will always all be routed, but duplicates are
3517 presumably rare, so I don't expect this is of any significance.
3519 For deliveries to pipes, files, and autoreplies, the duplicate checking
3520 still happens during the routing process, since they are not going to be
3523 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3524 It corrects a timeout issue with spamd. This is Ian's comment: "The
3525 background is that sometimes spamd either never reads data from a
3526 connection it has accepted, or it never writes response data. The exiscan
3527 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3528 blindly assumes that writes won't block so it may never time out."
3530 PH/39 Allow G after quota size as well as K and M.
3532 PH/40 The value set for $authenticated_id in an authenticator may not contain
3533 binary zeroes or newlines because the value is written to log lines and
3534 to spool files. There was no check on this. Now the value is run through
3535 the string_printing() function so that such characters are converted to
3536 printable escape sequences.
3538 PH/41 $message_linecount is a new variable that contains the total number of
3539 lines in the message. Compare $body_linecount, which is the count for the
3542 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3543 bounce and delay warning messages, except in certain special cases, which
3546 (a) An SMTP error message from a remote host;
3547 (b) A message specified in a :fail: redirection;
3548 (c) A message specified in a "fail" command in a system filter;
3549 (d) A message specified in a FAIL return from the queryprogram router;
3550 (e) A message specified by the cannot_route_message router option.
3552 In these cases only, Exim does include the error details in bounce and
3553 warning messages. There are also a few cases where bland messages such
3554 as "unrouteable address" or "local delivery error" are given.
3556 PH/43 $value is now also set for the "else" part of a ${run expansion.
3558 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3559 being worked on, but at least Exim now implements the latest version to
3562 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3563 process to complete was treated as a delivery failure, a timeout while
3564 writing the message to the pipe was logged, but erroneously treated as a
3565 successful delivery. Such timeouts include transport filter timeouts. For
3566 consistency with the overall process timeout, these timeouts are now
3567 treated as errors, giving rise to delivery failures by default. However,
3568 there is now a new Boolean option for the pipe transport called
3569 timeout_defer, which, if set TRUE, converts the failures into defers for
3570 both kinds of timeout. A transport filter timeout is now identified in
3573 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3574 systems where "make" and "gmake" are different, calling "gmake" at top
3575 level broke things. I've arranged for the value of $(MAKE) to be passed
3576 from the Makefile to this script so that it can call the same version of
3580 A note about Exim versions 4.44 and 4.50
3581 ----------------------------------------
3583 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3584 changes of various kinds. As a consequence, a big documentation update was
3585 needed. This delayed the release for rather longer than seemed good, especially
3586 in the light of a couple of (minor) security issues. Therefore, the changes
3587 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3588 release. So 4.44 and 4.50 are in effect two different branches that both start
3591 I have left the 4.50 change log unchanged; it contains all the changes since
3592 4.43. The change log for 4.44 is below; many of its items are identical to
3593 those for 4.50. This seems to be the most sensible way to preserve the
3594 historical information.
3600 1. Minor wording change to the doc/README.SIEVE file.
3602 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3603 computation of the current number of files was incorrect.
3605 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3606 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3609 4. Give more explanation in the error message when the command for a transport
3610 filter fails to execute.
3612 5. There are several places where Exim runs a non-Exim command in a
3613 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3614 was being done only for the command run by the queryprogram router. It is
3615 now done for all such subprocesses. The other cases are: ${run, transport
3616 filters, and the commands run by the lmtp and pipe transports.
3618 6. Added CONFIGURE_GROUP build-time option.
3620 7. Some older OS have a limit of 256 on the maximum number of file
3621 descriptors. Exim was using setrlimit() to set 1000 as a large value
3622 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3623 systems. I've change it so that if it can't get 1000, it tries for 256.
3625 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3626 was an oversight, and furthermore, ever since the addition of extra
3627 controls (e.g. 4.43/32), the checks on when to allow different forms of
3628 "control" were broken. There should now be diagnostics for all cases when a
3629 control that does not make sense is encountered.
3631 9. Added the /retain_sender option to "control=submission".
3633 10. $recipients is now available in the predata ACL (oversight).
3635 11. Tidy the search cache before the fork to do a delivery from a message
3636 received from the command line. Otherwise the child will trigger a lookup
3637 failure and thereby defer the delivery if it tries to use (for example) a
3638 cached ldap connection that the parent has called unbind on.
3640 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3641 of $address_data from the recipient verification was clobbered by the
3642 sender verification.
3644 13. The value of address_data from a sender verification is now available in
3645 $sender_address_data in subsequent conditions in the ACL statement.
3647 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3649 15. Added a new option "connect=<time>" to callout options, to set a different
3652 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3653 was its contents. (It was OK if the option was not defined at all.)
3655 17. A "Completed" log line is now written for messages that are removed from
3656 the spool by the -Mrm option.
3658 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3659 information about exactly what failed.
3661 19. Added -dd to debug only the daemon process.
3663 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3664 handles timeouts, both on the server side and network timeouts. Renamed the
3665 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3667 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3668 It is now set to "smtps".
3670 22. $host_address is now set to the target address during the checking of
3671 ignore_target_hosts.
3673 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3674 being passed; this would have caused $sender_host_name to have been used if
3675 matching the list had actually called for a host name (not very likely,
3676 since this list is usually IP addresses). A host name is now passed as
3679 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3680 code that specifies a non-restarting handler (typically sigaction() in
3681 modern systems) in an attempt to fix a rare and obscure crash bug.
3683 25. Narrowed the window for a race in the daemon that could cause it to ignore
3684 SIGCHLD signals. This is not a major problem, because they are used only to
3685 wake it up if nothing else does.
3687 26. A malformed maildirsize file could cause Exim to calculate negative values
3688 for the mailbox size or file count. Odd effects could occur as a result.
3689 The maildirsize information is now recalculated if the size or filecount
3692 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3693 support for a long time. Removed HAVE_SYS_VFS_H.
3695 28. Installed the latest version of exipick from John Jetmore.
3697 29. In an address list, if the pattern was not a regular expression, an empty
3698 subject address (from a bounce message) matched only if the pattern was an
3699 empty string. Non-empty patterns were not even tested. This was the wrong
3700 because it is perfectly reasonable to use an empty address as part of a
3701 database query. An empty address is now tested by patterns that are
3702 lookups. However, all the other forms of pattern expect the subject to
3703 contain a local part and a domain, and therefore, for them, an empty
3704 address still always fails if the pattern is not itself empty.
3706 30. Exim went into a mad DNS loop when attempting to do a callout where the
3707 host was specified on an smtp transport, and looking it up yielded more
3708 than one IP address.
3710 31. Re-factored the code for checking spool and log partition space into a
3711 function that finds that data and another that does the check. The former
3712 is then used to implement four new variables: $spool_space, $log_space,
3713 $spool_inodes, and $log_inodes.
3715 32. The RFC2047 encoding function was originally intended for short strings
3716 such as real names; it was not keeping to the 75-character limit for
3717 encoded words that the RFC imposes. It now respects the limit, and
3718 generates multiple encoded words if necessary. To be on the safe side, I
3719 have increased the buffer size for the ${rfc2047: expansion operator from
3722 33. It is now permitted to omit both strings after an "if" condition; if the
3723 condition is true, the result is "true". As before, when the second string
3724 is omitted, a false condition yields an empty string. This makes it less
3725 cumbersome to write custom ACL and router conditions.
3727 34. Failure to deliver a bounce message always caused it to be frozen, even if
3728 there was an errors_to setting on the router. The errors_to setting is now
3731 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3732 canonical form (fully expanded) before being placed in
3733 $sender_host_address.
3735 36. The table in the code that translates DNS record types into text (T_A to
3736 "A" for instance) was missing entries for NS and CNAME. It is just possible
3737 that this could have caused confusion if both these types were looked up
3738 for the same domain, because the text type is used as part of Exim's
3739 per-process caching. But the chance of anyone hitting this buglet seems
3742 37. The dnsdb lookup has been extended in a number of ways.
3744 (1) There is a new type, "zns", which walks up the domain tree until it
3745 finds some nameserver records. It should be used with care.
3747 (2) There is a new type, "mxh", which is like "mx" except that it returns
3748 just the host names, not the priorities.
3750 (3) It is now possible to give a list of domains (or IP addresses) to be
3751 looked up. The behaviour when one of the lookups defers can be
3752 controlled by a keyword.
3754 (4) It is now possible to specify the separator character for use when
3755 multiple records are returned.
3757 38. The dnslists ACL condition has been extended: it is now possible to supply
3758 a list of IP addresses and/or domains to be looked up in a particular DNS
3761 39. Added log_selector=+queue_time_overall.
3763 40. When running the queue in the test harness, wait just a tad after forking a
3764 delivery process, to get repeatability of debugging output.
3766 41. Include certificate and key file names in error message when GnuTLS fails
3767 to set them up, because the GnuTLS error message doesn't include the name
3768 of the failing file when there is a problem reading it.
3770 42. Allow both -bf and -bF in the same test run.
3772 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3774 44. The "Exiscan patch" is now merged into the mainline Exim source.
3776 45. Sometimes the final signoff response after QUIT could fail to get
3777 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3778 < 0 before doing a fflush(). This bug looks as though it goes back to the
3779 introduction of TLS in release 3.20, but "sometimes" must have been rare
3780 because the tests only now provoked it.
3782 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3783 (this can affect the format of dates).
3785 47. exim_tidydb, when checking for the continued existence of a message for
3786 which it has found a message-specific retry record, was not finding
3787 messages that were in split spool directories. Consequently, it was
3788 deleting retry records that should have stayed in existence.
3790 48. Steve fixed some bugs in eximstats.
3792 49. The SPA authentication driver was not abandoning authentication and moving
3793 on to the next authenticator when an expansion was forced to fail,
3794 contradicting the general specification for all authenticators. Instead it
3795 was generating a temporary error. It now behaves as specified.
3797 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3798 (the order specifies the preference for clients). The order is now AES256,
3799 AES128, 3DES, ARCFOUR128.
3801 51. Small patch to Sieve code - explicitly set From: when generating an
3804 52. Exim crashed if a remote delivery caused a very long error message to be
3805 recorded - for instance if somebody sent an entire SpamAssassin report back
3806 as a large number of 550 error lines. This bug was coincidentally fixed by
3807 increasing the size of one of Exim's internal buffers (big_buffer) that
3808 happened as part of the Exiscan merge. However, to be on the safe side, I
3809 have made the code more robust (and fixed the comments that describe what
3812 53. Now that there can be additional text after "Completed" in log lines (if
3813 the queue_time_overall log selector is set), a one-byte patch to exigrep
3814 was needed to allow it to recognize "Completed" as not the last thing in
3817 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3818 patch that reportedly fixes this has been added. I am not expert enough to
3819 create a test for it. This is what the patch creator wrote:
3821 "I found a little strange behaviour of ldap code when working with
3822 Windows 2003 AD Domain, where users was placed in more than one
3823 Organization Units. When I tried to give exim partial DN, the exit code
3824 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3825 But simultaneously result of request was absolutely normal ldap result,
3826 so I produce this patch..."
3828 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3829 REFERENCE, so I have modified the code to exclude the patch when that macro
3832 55. Some experimental protocols are using DNS PTR records for new purposes. The
3833 keys for these records are domain names, not reversed IP addresses. The
3834 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3835 leaves it alone. Component reversal etc. now happens only for IP addresses.
3838 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3840 57. Double the size of the debug message buffer (to 2048) so that more of very
3841 long debug lines gets shown.
3843 58. The exicyclog utility now does better if the number of log files to keep
3844 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3846 59. Two changes related to the smtp_active_hostname option:
3848 (1) $smtp_active_hostname is now available as a variable.
3849 (2) The default for smtp_banner uses $smtp_active_hostname instead
3850 of $primary_hostname.
3852 60. The host_aton() function is supposed to be passed a string that is known
3853 to be a valid IP address. However, in the case of IPv6 addresses, it was
3854 not checking this. This is a hostage to fortune. Exim now panics and dies
3855 if the condition is not met. A case was found where this could be provoked
3856 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3857 components; fortuitously, this particular loophole had already been fixed
3858 by change 4.50/55 above.
3860 If there are any other similar loopholes, the new check in host_aton()
3861 itself should stop them being exploited. The report I received stated that
3862 data on the command line could provoke the exploit when Exim was running as
3863 exim, but did not say which command line option was involved. All I could
3864 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3865 running as the user.
3868 61. There was a buffer overflow vulnerability in the SPA authentication code
3869 (which came originally from the Samba project). I have added a test to the
3870 spa_base64_to_bits() function which I hope fixes it.
3873 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3874 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3876 63. The daemon start-up calls getloadavg() while still root for those OS that
3877 need the first call to be done as root, but it missed one case: when
3878 deliver_queue_load_max is set with deliver_drop_privilege. This is
3879 necessary for the benefit of the queue runner, because there is no re-exec
3880 when deliver_drop_privilege is set.
3882 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3883 This has been fixed.
3885 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3886 was in use, was not putting the data itself into the right store pool;
3887 consequently, it could be overwritten for a subsequent message in the same
3888 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3891 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3893 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3894 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3895 the function were treating the return as a boolean value, which happened to
3896 work because 0=false and not-0=true, but is not correct code.
3898 68. The host_aton() function was not handling scoped IPv6 addresses (those
3899 with, for example, "%eth0" on the end) correctly.
3901 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3902 negated items (that is, ~something) in unsigned ints. Some compilers
3903 apparently mutter when there is no cast.
3905 70. If an address verification called from an ACL failed, and did not produce a
3906 user-specific message (i.e. there was only a "system" message), nothing was
3907 put in $acl_verify_message. In this situation, it now puts the system
3910 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3911 session; change 4.31/43 added the unwanted input to the log line - except
3912 that it did not do this in the start of session case. It now does.
3914 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3915 This is wrong and can cause the other end to generate a synchronization
3916 error if it is another Exim or anything else that does the synchronization
3917 check. A QUIT command is no longer sent after a timeout.
3919 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3920 during host lookups.
3922 74. The defer_ok option of callout verification was not working if it was used
3923 when verifying addresses in header lines, that is, for this case:
3925 verify = header_sender/callout=defer_ok
3927 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3928 those file descriptors could be used for SMTP connections. If anything
3929 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3930 could be sent to the SMTP client, causing chaos. The daemon now opens
3931 stdin, stdout, and stderr to /dev/null when it puts itself into the
3934 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3935 log by default. The user can override this with suitable Perl magic.
3937 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3938 the log message when discard triggers, was not working for the DATA ACL or
3939 for the non-SMTP ACL.
3941 78. Error message wording change in sieve.c.
3943 79. If smtp_accept_max_per_host was set, the number of connections could be
3944 restricted to fewer than expected, because the daemon was trying to set up
3945 a new connection before checking whether the processes handling previous
3946 connections had finished. The check for completed processes is now done
3947 earlier. On busy systems, this bug wouldn't be noticed because something
3948 else would have woken the daemon, and it would have reaped the completed
3951 80. If a message was submitted locally by a user whose login name contained one
3952 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3953 It caused a spool format error. I have fixed the spool reading code. A
3954 related problem was that the "from" clause in the Received: line became
3955 illegal because of the space(s). It is now covered by ${quote_local_part.
3957 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3960 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3962 83. Patch from Sieve maintainer to fix unterminated string problem in
3963 "vacation" handling.
3965 84. Some minor changes to the Linux configuration files to help with other
3966 OS variants using glibc.
3968 85. One more patch for Sieve to update vacation handling to latest spec.
3971 ----------------------------------------------------
3972 See the note above about the 4.44 and 4.50 releases.
3973 ----------------------------------------------------
3979 1. Change 4.43/35 introduced a bug that caused file counts to be
3980 incorrectly computed when quota_filecount was set in an appendfile
3983 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3984 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3987 3. Give more explanation in the error message when the command for a transport
3988 filter fails to execute.
3990 4. There are several places where Exim runs a non-Exim command in a
3991 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3992 was being done only for the command run by the queryprogram router. It is
3993 now done for all such subprocesses. The other cases are: ${run, transport
3994 filters, and the commands run by the lmtp and pipe transports.
3996 5. Some older OS have a limit of 256 on the maximum number of file
3997 descriptors. Exim was using setrlimit() to set 1000 as a large value
3998 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3999 systems. I've change it so that if it can't get 1000, it tries for 256.
4001 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4002 was an oversight, and furthermore, ever since the addition of extra
4003 controls (e.g. 4.43/32), the checks on when to allow different forms of
4004 "control" were broken. There should now be diagnostics for all cases when a
4005 control that does not make sense is encountered.
4007 7. $recipients is now available in the predata ACL (oversight).
4009 8. Tidy the search cache before the fork to do a delivery from a message
4010 received from the command line. Otherwise the child will trigger a lookup
4011 failure and thereby defer the delivery if it tries to use (for example) a
4012 cached ldap connection that the parent has called unbind on.
4014 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4015 of $address_data from the recipient verification was clobbered by the
4016 sender verification.
4018 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4019 was its contents. (It was OK if the option was not defined at all.)
4021 11. A "Completed" log line is now written for messages that are removed from
4022 the spool by the -Mrm option.
4024 12. $host_address is now set to the target address during the checking of
4025 ignore_target_hosts.
4027 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4028 being passed; this would have caused $sender_host_name to have been used if
4029 matching the list had actually called for a host name (not very likely,
4030 since this list is usually IP addresses). A host name is now passed as
4033 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4034 code that specifies a non-restarting handler (typically sigaction() in
4035 modern systems) in an attempt to fix a rare and obscure crash bug.
4037 15. Narrowed the window for a race in the daemon that could cause it to ignore
4038 SIGCHLD signals. This is not a major problem, because they are used only to
4039 wake it up if nothing else does.
4041 16. A malformed maildirsize file could cause Exim to calculate negative values
4042 for the mailbox size or file count. Odd effects could occur as a result.
4043 The maildirsize information is now recalculated if the size or filecount
4046 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4047 support for a long time. Removed HAVE_SYS_VFS_H.
4049 18. Updated exipick to current release from John Jetmore.
4051 19. Allow an empty sender to be matched against a lookup in an address list.
4052 Previously the only cases considered were a regular expression, or an
4055 20. Exim went into a mad DNS lookup loop when doing a callout where the
4056 host was specified on the transport, if the DNS lookup yielded more than
4059 21. The RFC2047 encoding function was originally intended for short strings
4060 such as real names; it was not keeping to the 75-character limit for
4061 encoded words that the RFC imposes. It now respects the limit, and
4062 generates multiple encoded words if necessary. To be on the safe side, I
4063 have increased the buffer size for the ${rfc2047: expansion operator from
4066 22. Failure to deliver a bounce message always caused it to be frozen, even if
4067 there was an errors_to setting on the router. The errors_to setting is now
4070 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4071 canonical form (fully expanded) before being placed in
4072 $sender_host_address.
4074 24. Updated eximstats to version 1.33
4076 25. Include certificate and key file names in error message when GnuTLS fails
4077 to set them up, because the GnuTLS error message doesn't include the name
4078 of the failing file when there is a problem reading it.
4080 26. Expand error message when OpenSSL has problems setting up cert/key files.
4083 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4084 (this can affect the format of dates).
4086 28. exim_tidydb, when checking for the continued existence of a message for
4087 which it has found a message-specific retry record, was not finding
4088 messages that were in split spool directories. Consequently, it was
4089 deleting retry records that should have stayed in existence.
4091 29. eximstats updated to version 1.35
4092 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4093 1.35 - bugfix such that pie charts by volume are generated correctly
4095 30. The SPA authentication driver was not abandoning authentication and moving
4096 on to the next authenticator when an expansion was forced to fail,
4097 contradicting the general specification for all authenticators. Instead it
4098 was generating a temporary error. It now behaves as specified.
4100 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4101 (the order specifies the preference for clients). The order is now AES256,
4102 AES128, 3DES, ARCFOUR128.
4104 31. Small patch to Sieve code - explicitly set From: when generating an
4107 32. Exim crashed if a remote delivery caused a very long error message to be
4108 recorded - for instance if somebody sent an entire SpamAssassin report back
4109 as a large number of 550 error lines. This bug was coincidentally fixed by
4110 increasing the size of one of Exim's internal buffers (big_buffer) that
4111 happened as part of the Exiscan merge. However, to be on the safe side, I
4112 have made the code more robust (and fixed the comments that describe what
4115 33. Some experimental protocols are using DNS PTR records for new purposes. The
4116 keys for these records are domain names, not reversed IP addresses. The
4117 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4118 leaves it alone. Component reversal etc. now happens only for IP addresses.
4121 34. The host_aton() function is supposed to be passed a string that is known
4122 to be a valid IP address. However, in the case of IPv6 addresses, it was
4123 not checking this. This is a hostage to fortune. Exim now panics and dies
4124 if the condition is not met. A case was found where this could be provoked
4125 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4126 components; fortuitously, this particular loophole had already been fixed
4127 by change 4.50/55 or 4.44/33 above.
4129 If there are any other similar loopholes, the new check in host_aton()
4130 itself should stop them being exploited. The report I received stated that
4131 data on the command line could provoke the exploit when Exim was running as
4132 exim, but did not say which command line option was involved. All I could
4133 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4134 running as the user.
4137 35. There was a buffer overflow vulnerability in the SPA authentication code
4138 (which came originally from the Samba project). I have added a test to the
4139 spa_base64_to_bits() function which I hope fixes it.
4142 36. The daemon start-up calls getloadavg() while still root for those OS that
4143 need the first call to be done as root, but it missed one case: when
4144 deliver_queue_load_max is set with deliver_drop_privilege. This is
4145 necessary for the benefit of the queue runner, because there is no re-exec
4146 when deliver_drop_privilege is set.
4148 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4149 was in use, was not putting the data itself into the right store pool;
4150 consequently, it could be overwritten for a subsequent message in the same
4151 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4154 38. Sometimes the final signoff response after QUIT could fail to get
4155 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4156 < 0 before doing a fflush(). This bug looks as though it goes back to the
4157 introduction of TLS in release 3.20, but "sometimes" must have been rare
4158 because the tests only now provoked it.
4164 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4165 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4166 Now it returns an integer. A number of calls were still expecting a T/F
4167 return. Fortuitously, in all cases, the tests worked in OK situations,
4168 which is the norm. However, things would have gone wrong on any write
4169 failures on the smtp file descriptor. This function is used when sending
4170 messages over SMTP and also when doing verify callouts.
4172 2. When Exim is called to do synchronous delivery of a locally submitted
4173 message (the -odf or -odi options), it no longer closes stderr before doing
4176 3. Implemented the mua_wrapper option.
4178 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4180 5. Implemented the functions header_remove(), header_testname(),
4181 header_add_at_position(), and receive_remove_recipient(), and exported them
4184 6. If an ACL "warn" statement specified the addition of headers, Exim already
4185 inserted X-ACL-Warn: at the start if there was no header name. However, it
4186 was not making this test for the second and subsequent header lines if
4187 there were newlines in the string. This meant that an invalid header could
4188 be inserted if Exim was badly configured.
4190 7. Allow an ACL "warn" statement to add header lines at the start or after all
4191 the Received: headers, as well as at the end.
4193 8. Added the rcpt_4xx retry error code.
4195 9. Added postmaster_mailfrom=xxx to callout verification option.
4197 10. Added mailfrom=xxxx to the callout verification option, for verify=
4200 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4201 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4203 12. Inserted some casts to stop certain compilers warning when using pointer
4204 differences as field lengths or precisions in printf-type calls (mostly
4205 affecting debugging statements).
4207 13. Added optional readline() support for -be (dynamically loaded).
4209 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4210 same clock tick as a message's arrival, so that its received time was the
4211 same as the "first fail" time on the retry record, and that message
4212 remained on the queue past the ultimate address timeout, every queue runner
4213 would try a delivery (because it was past the ultimate address timeout) but
4214 after another failure, the ultimate address timeout, which should have then
4215 bounced the address, did not kick in. This was a "< instead of <=" error;
4216 in most cases the first failure would have been in the next clock tick
4217 after the received time, and all would be well.
4219 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4220 being recognized when the domain list was tested by the match_domain
4221 condition in an expansion string.
4223 16. Added the ${str2b64: operator.
4225 17. Exim was always calling setrlimit() to set a large limit for the number of
4226 processes, without checking whether the existing limit was already
4227 adequate. (It did check for the limit on file descriptors.) Furthermore,
4228 errors from getrlimit() and setrlimit() were being ignored. Now they are
4229 logged to the main and panic logs, but Exim does carry on, to try to do its
4230 job under whatever limits there are.
4232 18. Imported PCRE 5.0.
4234 19. Trivial typo in log message " temporarily refused connection" (the leading
4237 20. If the log selector return_path_on_delivery was set and an address was
4238 redirected to /dev/null, the delivery process crashed because it assumed
4239 that a return path would always be set for a "successful" delivery. In this
4240 case, the whole delivery is bypassed as an optimization, and therefore no
4243 21. Internal re-arrangement: the function for sending a challenge and reading
4244 a response while authentication was assuming a zero-terminated challenge
4245 string. It's now changed to take a pointer and a length, to allow for
4246 binary data in such strings.
4248 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4250 23. Exim was not respecting finduser_retries when seeking the login of the
4251 uid under which it was called; it was always trying 10 times. (The default
4252 setting of finduser_retries is zero.) Also, it was sleeping after the final
4253 failure, which is pointless.
4255 24. Implemented tls_on_connect_ports.
4257 25. Implemented acl_smtp_predata.
4259 26. If the domain in control=submission is set empty, Exim assumes that the
4260 authenticated id is a complete email address when it generates From: or
4261 Sender: header lines.
4263 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4264 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4265 chown and chgrp in /bin and hostname in /usr/bin.
4267 28. Exim was keeping the "process log" file open after each use, just as it
4268 does for the main log. This opens the possibility of it remaining open for
4269 long periods when the USR1 signal hits a daemon. Occasional processlog
4270 errors were reported, that could have been caused by this. Anyway, it seems
4271 much more sensible not to leave this file open at all, so that is what now
4274 29. The long-running daemon process does not normally write to the log once it
4275 has entered its main loop, and it closes the log before doing so. This is
4276 so that log files can straightforwardly be renamed and moved. However,
4277 there are a couple of unusual error situations where the daemon does write
4278 log entries, and I had neglected to close the log afterwards.
4280 30. The text of an SMTP error response that was received during a remote
4281 delivery was being truncated at 512 bytes. This is too short for some of
4282 the long messages that one sometimes sees. I've increased the limit to
4285 31. It is now possible to make retry rules that apply only when a message has a
4286 specific sender, in particular, an empty sender.
4288 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4289 it possible to be selective about when SMTP synchronization is enforced.
4291 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4293 32. Implemented hosts_connection_nolog.
4295 33. Added an ACL for QUIT.
4297 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4300 35. Added mailbox_size and mailbox_filecount to appendfile.
4302 36. Added control = no_multiline_responses to ACLs.
4304 37. There was a bug in the logic of the code that waits for the clock to tick
4305 in the case where the clock went backwards by a substantial amount such
4306 that the microsecond fraction of "now" was more than the microsecond
4307 fraction of "then" (but the whole seconds number was less).
4309 38. Added support for the libradius Radius client library this is found on
4310 FreeBSD (previously only the radiusclient library was supported).
4316 1. When certain lookups returned multiple values in the form name=value, the
4317 quoting of the values was not always being done properly. Specifically:
4318 (a) If the value started with a double quote, but contained no whitespace,
4320 (b) If the value contained whitespace other than a space character (i.e.
4321 tabs or newlines or carriage returns) it was not quoted.
4322 This fix has been applied to the mysql and pgsql lookups by writing a
4323 separate quoting function and calling it from the lookup code. The fix
4324 should probably also be applied to nisplus, ibase and oracle lookups, but
4325 since I cannot test any of those, I have not disturbed their existing code.
4327 2. A hit in the callout cache for a specific address caused a log line with no
4328 reason for rejecting RCPT. Now it says "Previous (cached) callout
4329 verification failure".
4331 3. There was an off-by-one bug in the queryprogram router. An over-long
4332 return line was truncated at 256 instead of 255 characters, thereby
4333 overflowing its buffer with the terminating zero. As well as fixing this, I
4334 have increased the buffer size to 1024 (and made a note to document this).
4336 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4337 when Exim is waiting for an SMTP response from a remote server, Exim
4338 restarts its select() call on the socket, thereby resetting its timeout.
4339 This is not a problem when such interrupts are rare. Somebody set up a cron
4340 job to run exiwhat every 2 minutes, which is less than the normal select()
4341 timeout (5 or 10 minutes). This meant that the select() timeout never
4342 kicked in because it was always reset. I have fixed this by comparing the
4343 time when an interrupt arrives with the time at the start of the first call
4344 to select(). If more time than the timeout has elapsed, the interrupt is
4345 treated as a timeout.
4347 5. Some internal re-factoring in preparation for the addition of Sieve
4348 extensions (by MH). In particular, the "personal" test is moved to a
4349 separate function, and given an option for scanning Cc: and Bcc: (which is
4350 not set for Exim filters).
4352 6. When Exim created an email address using the login of the caller as the
4353 local part (e.g. when creating a From: or Sender: header line), it was not
4354 quoting the local part when it contained special characters such as @.
4356 7. Installed new OpenBSD configuration files.
4358 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4359 try to make them clearer.
4361 9. Callout options, other than the timeout value, were being ignored when
4362 verifying sender addresses in header lines. For example, when using
4364 verify = header_sender/callout=no_cache
4366 the cache was (incorrectly) being used.
4368 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4369 only the Cygwin environment.
4371 11. When return_path_on_delivery was set as a log selector, if different remote
4372 addresses in the same message used different return paths and parallel
4373 remote delivery occurred, the wrong values would sometimes be logged.
4374 (Whenever a remote delivery process finished, the return path value from
4375 the most recently started remote delivery process was logged.)
4377 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4378 lines when AUTH and/or TLS are in use. This is the "received protocol"
4379 field. Exim used to use "asmtp" for authenticated SMTP, without any
4380 indication (in the protocol name) for TLS use. Now it follows the RFC and
4381 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4382 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4383 names appear in log lines as well as in Received: header lines.
4385 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4386 extensions, and comparison tests, and to fix some bugs.
4388 14. Changes to the "personal" filter test:
4390 (1) The test was buggy in that it was just doing the equivalent of
4391 "contains" tests on header lines. For example, if a user's address was
4392 anne@some.where, the "personal" test would incorrectly be true for
4394 To: susanne@some.where
4396 This test is now done by extracting each address from the header in turn,
4397 and checking the entire address. Other tests that are part of "personal"
4398 are now done using regular expressions (for example, to check local parts
4399 of addresses in From: header lines).
4401 (2) The list of non-personal local parts in From: addresses has been
4402 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4403 taken from the Sieve specification recommendations.
4405 (3) If the message contains any header line starting with "List-" it is
4406 treated as non-personal.
4408 (4) The test for "circular" in the Subject: header line has been removed
4409 because it now seems ill-conceived.
4411 15. Minor typos in src/EDITME comments corrected.
4413 16. Installed latest exipick from John Jetmore.
4415 17. If headers_add on a router specified a text string that was too long for
4416 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4417 of string_sprintf() is now avoided.
4419 18. $message_body_size was not set (it was always zero) when running the DATA
4420 ACL and the local_scan() function.
4422 19. For the "mail" command in an Exim filter, no default was being set for
4423 the once_repeat time, causing a random time value to be used if "once" was
4424 specified. (If the value happened to be <= 0, no repeat happened.) The
4425 default is now 0s, meaning "never repeat". The "vacation" command was OK
4426 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4427 (I found it when inspecting the code).
4429 20. There is now an overall timeout for performing a callout verification. It
4430 defaults to 4 times the callout timeout, which applies to individual SMTP
4431 commands during the callout. The overall timeout applies when there is more
4432 than one host that can be tried. The timeout is checked before trying the
4433 next host. This prevents very long delays if there are a large number of
4434 hosts and all are timing out (e.g. when the network connections are timing
4435 out). The value of the overall timeout can be changed by specifying an
4436 additional sub-option for "callout", called "maxwait". For example:
4438 verify = sender/callout=5s,maxwait=20s
4440 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4441 to the end before writing, but this should make it even safer).
4443 22. Exim was forgetting that it had advertised PIPELINING for the second and
4444 subsequent messages on an SMTP connection. It was also not resetting its
4445 memory on STARTTLS and an internal HELO.
4447 23. When Exim logs an SMTP synchronization error within a session, it now
4448 records whether PIPELINING has been advertised or not.
4450 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4451 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4452 rather than long int.
4454 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4456 26. Added the never_mail option to autoreply.
4462 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4463 crash if the getsockname() call failed; this can happen if a connection is
4464 closed very soon after it is established. The problem was simply in the
4465 order in which certain operations were done, causing Exim to try to write
4466 to the SMTP stream before it had set up the file descriptor. The bug has
4467 been fixed by making things happen in the correct order.
4473 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4474 before the connection was closed, thus losing the rejection response.
4476 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4477 some early Solaris releases, but causes trouble in current releases where
4478 socklen_t is defined.
4480 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4483 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4486 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4487 that releasing the top of it at the end releases what was used for sub-
4488 expansions (unless the block got too big). However, discard this block if
4489 the first thing is a variable or header, so that we can use its block when
4490 it is dynamic (useful for very large $message_headers, for example).
4492 6. Lookups now cache *every* query, not just the most recent. A new, separate
4493 store pool is used for this. It can be recovered when all lookup caches are
4494 flushed. Lookups now release memory at the end of their result strings.
4495 This has involved some general refactoring of the lookup sources.
4497 7. Some code has been added to the store_xxx() functions to reduce the amount
4498 of flapping under certain conditions.
4500 8. log_incoming_interface used to affect only the <= reception log lines. Now
4501 it causes the local interface and port to be added to several more SMTP log
4502 lines, for example "SMTP connection from", and rejection lines.
4504 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4506 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4508 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4509 could be overwritten at the end of the current message (or the start of a
4510 new message if it was set in a HELO ACL). The value is now preserved for
4511 the duration of the SMTP connection.
4513 12. If a transport had a headers_rewrite setting, and a matching header line
4514 contained an unqualified address, that address was qualified, even if it
4515 did not match any rewriting rules. The underlying bug was that the values
4516 of the flags that permit the existence of unqualified sender and recipient
4517 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4518 non-local messages, and by -bnq for local messages) were not being
4519 preserved with the message after it was received.
4521 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4522 "next input=" as part of the text comprising the host identity instead of
4523 the correct text. The code was using the same buffer for two different
4524 strings. However, depending on which order the printing function evaluated
4525 its arguments, the bug did not always show up. Under Linux, for example, my
4526 test suite worked just fine.
4528 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4529 doesn't work with some older versions of Perl. It has been changed to "my",
4530 which in any case is probably the better facility to use.
4532 15. A really picky compiler found some instances of statements for creating
4533 error messages that either had too many or two few arguments for the format
4536 16. The size of the buffer for calls to the DNS resolver has been increased
4537 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4538 for addresses that have a lot of PTR records. This alleviates a problem; it
4539 does not fully solve it.
4541 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4542 buffer now truncates the list and logs the incident, which is the same
4543 action as happens when Exim is looking up a host name and its aliases.
4544 Previously in this situation something unpredictable would happen;
4545 sometimes it was "internal error: store_reset failed".
4547 18. If a server dropped the connection unexpectedly when an Exim client was
4548 using GnuTLS and trying to read a response, the client delivery process
4549 crashed while trying to generate an error log message.
4551 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4552 string, for example:
4554 warn message = H1: something\nH2: something
4556 the text was added as a single header line from Exim's point of view
4557 though it ended up OK in the delivered message. However, searching for the
4558 second and subsequent header lines using $h_h2: did not work. This has been
4559 fixed. Similarly, if a system filter added multiple headers in this way,
4560 the routers could not see them.
4562 20. Expanded the error message when iplsearch is called with an invalid key to
4563 suggest using net-iplsearch in a host list.
4565 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4566 ACLs are no longer actually imposed (and a message to that effect is
4569 22. If a "gecos" field in a passwd entry contained escaped characters, in
4570 particular, if it contained a \" sequence, Exim got it wrong when building
4571 a From: or a Sender: header from that name. A second bug also caused
4572 incorrect handling when an unquoted " was present following a character
4573 that needed quoting.
4575 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4576 was not being matched caselessly.
4578 24. Arranged for all hyphens in the exim.8 source to be escaped with
4581 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4582 properly. Recipient callout cache records were still being keyed to include
4583 the sender, even when use_sender was set false. This led to far more
4584 callouts that were necessary. The sender is no longer included in the key
4585 when use_sender is false.
4587 26. Added "control = submission" modifier to ACLs.
4589 27. Added the ${base62d: operator to decode base 62 numbers.
4591 28. dnsdb lookups can now access SRV records.
4593 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4594 the configuration file.
4596 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4597 (-v) mode. This makes the output for a verbose queue run more intelligible.
4599 31. Added a use_postmaster feature to recipient callouts.
4601 32. Added the $body_zerocount variable, containing the number of binary zero
4602 bytes in the message body.
4604 33. The time of last modification of the "new" subdirectory is now used as the
4605 "mailbox time last read" when there is a quota error for a maildir
4608 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4610 35. Added +ignore_unknown as a special item in host lists.
4612 36. Code for decoding IPv6 addresses in host lists is now included, even if
4613 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4614 address was recognized as an IP address, but was then not correctly decoded
4615 into binary, causing unexpected and incorrect effects when compared with
4622 1. Very minor rewording of debugging text in manualroute to say "list of
4623 hosts" instead of "hostlist".
4625 2. If verify=header_syntax was set, and a header line with an unqualified
4626 address (no domain) and a large number of spaces between the end of the
4627 name and the colon was received, the reception process suffered a buffer
4628 overflow, and (when I tested it) crashed. This was caused by some obsolete
4629 code that should have been removed. The fix is to remove it!
4631 3. When running in the test harness, delay a bit after writing a bounce
4632 message to get a bit more predictability in the log output.
4634 4. Added a call to search_tidyup() just before forking a reception process. In
4635 theory, someone could use a lookup in the expansion of smtp_accept_max_
4636 per_host which, without the tidyup, could leave open a database connection.
4638 5. Added the variables $recipient_data and $sender_data which get set from a
4639 lookup success in an ACL "recipients" or "senders" condition, or a router
4640 "senders" option, similar to $domain_data and $local_part_data.
4642 6. Moved the writing of debug_print from before to after the "senders" test
4645 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4646 problems for message scanning, either using a data ACL, or using
4647 local_scan() because the Received: header was not generated till after they
4648 were called (in order to set the time as the time of reception completion).
4649 I have revised the way this works. The header is now generated after the
4650 body is received, but before the ACL or local_scan() are called. After they
4651 are run, the timestamp in the header is updated.
4657 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4658 before starting a queue runner without re-exec. This happened only when
4659 deliver_drop_privilege was set or when the Exim user was set to root. The
4660 effect of the bug was that timeouts during subsequent deliveries caused
4661 crashes instead of being properly handled. The handler is now left at its
4662 default (and expected) setting.
4664 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4665 message, again when deliver_drop_privilege is set or Exim is run as root.
4666 The bug described in (1) was not present in this case, but the tidying up
4667 of the other signals was missing. I have made the two cases consistent.
4669 3. The ignore_target_hosts setting on a manualroute router was being ignored
4670 for hosts that were looked up using the /MX notation.
4672 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4675 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4676 operated on the sender address. After changing the $sender_address to <>
4677 for the sender address verify, Exim was re-instated it as the original
4678 (before rewriting) address, but remembering that it had rewritten it, so it
4679 wasn't rewriting it again. This bug also had the effect of breaking the
4680 sender address verification caching when the sender address was rewritten.
4682 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4683 This has been changed so that if the ip literal address matches
4684 ignore_target_hosts, the router declines.
4686 7. Added expansion conditions match_domain, match_address, and match_local_
4687 part (NOT match_host).
4689 8. The placeholder for the Received: header didn't have a length field set.
4691 9. Added code to Exim itself and to exim_lock to test for a specific race
4692 condition that could lead to file corruption when using MBX delivery. The
4693 issue is with the lockfile that is created in /tmp. If this file is removed
4694 after a process has opened it but before that process has acquired a lock,
4695 there is the potential for a second process to recreate the file and also
4696 acquire a lock. This could lead to two Exim processes writing to the file
4697 at the same time. The added code performs the same test as UW imapd; it
4698 checks after acquiring the lock that its file descriptor still refers to
4699 the same named file.
4701 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4702 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4705 11. Added the smtp_active_hostname option. If used, this will typically be made
4706 to depend on the incoming interface address. Because $interface_address is
4707 not set up until the daemon has forked a reception process, error responses
4708 that can happen earlier (such as "too many connections") no longer contain
4711 12. If an expansion in a condition on a "warn" statement fails because a lookup
4712 defers, the "warn" statement is abandoned, and the next ACL statement is
4713 processed. Previously this caused the whole ACL to be aborted.
4715 13. Added the iplsearch lookup type.
4717 14. Added ident_timeout as a log selector.
4719 15. Added tls_certificate_verified as a log selector.
4721 16. Added a global option tls_require_ciphers (compare the smtp transport
4722 option of the same name). This controls incoming TLS connections.
4724 17. I finally figured out how to make tls_require_ciphers do a similar thing
4725 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4726 before starting the TLS session.
4728 18. Tabs are now shown as \t in -bP output.
4730 19. If the log selector return_path_on_delivery was set, Exim crashed when
4731 bouncing a message because it had too many Received: header lines.
4733 20. If two routers both had headers_remove settings, and the first one included
4734 a superfluous trailing colon, the final name in the first list and the
4735 first name in the second list were incorrectly joined into one item (with a
4736 colon in the middle).
4742 1. Added -C and -D options to the exinext utility, mainly to make it easier
4743 to include in the automated testing, but these could be helpful when
4744 multiple configurations are in use.
4746 2. The exinext utility was not formatting the output nicely when there was
4747 an alternate port involved in the retry record key, nor when there was a
4748 message id as well (for retries that were specific to a specific message
4749 and a specific host). It was also confused by IPv6 addresses, because of
4750 the additional colons they contain. I have fixed the IPv4 problem, and
4751 patched it up to do a reasonable job for IPv6.
4753 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4754 delivery, the log line now contains "pipelined" if PIPELINING was used.
4756 4. An SMTP transport process used to panic and die if the bind() call to set
4757 an explicit outgoing interface failed. This has been changed; it is now
4758 treated in the same way as a connect() failure.
4760 5. A reference to $sender_host_name in the part of a conditional expansion
4761 that was being skipped was still causing a DNS lookup. This no longer
4764 6. The def: expansion condition was not recognizing references to header lines
4765 that used bh_ and bheader_.
4767 7. Added the _cache feature to named lists.
4769 8. The code for checking quota_filecount in the appendfile transport was
4770 allowing one more file than it should have been.
4772 9. For compatibility with Sendmail, the command line option
4780 and sets the incoming protocol and host name (for trusted callers). The
4781 host name and its colon can be omitted when only the protocol is to be set.
4782 Note the Exim already has two private options, -pd and -ps, that refer to
4783 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4784 "s", but I don't think that's a major issue.
4786 10. A number of refactoring changes to the code, none of which should affect
4789 (a) The number of logging options was getting close to filling up the
4790 32-bit word that was used as a bit map. I have split them into two classes:
4791 those that are passed in the argument to log_write(), and those that are
4792 only ever tested independently outside of that function. These are now in
4793 separate 32-bit words, so there is plenty of room for expansion again.
4794 There is no change in the user interface or the logging behaviour.
4796 (b) When building, for example, log lines, the code previously used a
4797 macro that called string_cat() twice, in order to add two strings. This is
4798 not really sufficiently general. Furthermore, there was one instance where
4799 it was actually wrong because one of the argument was used twice, and in
4800 one call a function was used. (As it happened, calling the function twice
4801 did not affect the overall behaviour.) The macro has been replaced by a
4802 function that can join an arbitrary number of extra strings onto a growing
4805 (c) The code for expansion conditions now uses a table and a binary chop
4806 instead of a serial search (which was left over from when there were very
4807 few conditions). Also, it now recognizes conditions like "pam" even when
4808 the relevant support is not compiled in: a suitably worded error message is
4809 given if an attempt is made to use such a condition.
4811 11. Added ${time_interval:xxxxx}.
4813 12. A bug was causing one of the ddress fields not to be passed back correctly
4814 from remote delivery subprocesses. The field in question was not being
4815 subsequently used, so this caused to problems in practice.
4817 13. Added new log selectors queue_time and deliver_time.
4819 14. Might have fixed a bug in maildirsizefile handling that threw up
4820 "unexpected character" debug warnings, and recalculated the data
4821 unnecessarily. In any case, I expanded the warning message to give more
4824 15. Added the message "Restricted characters in address" to the statements in
4825 the default ACL that block characters like @ and % in local parts.
4827 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4828 Three changes have been made:
4830 (a) There was a serious bug; a negative response to MAIL caused the whole
4831 recipient domain to be cached as invalid, thereby blocking all messages
4832 to all local parts at the same domain, from all senders. This bug has
4833 been fixed. The domain is no longer cached after a negative response to
4834 MAIL if the sender used is not empty.
4836 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4839 (c) A new callout option, "use_sender" has been added for people who want
4840 the modified behaviour.
4846 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4849 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4850 indeed breaks things for older releases.
4852 3. Added additional logging to the case where there is a problem reading data
4853 from a filter that is running in a subprocess using a pipe, in order to
4854 try to track down a specific problem.
4856 4. Testing facility fudge: when running in the test harness and attempting
4857 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4858 getting "No route to host". Convert this to a timeout.
4860 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4863 6. Some OS don't have socklen_t but use size_t instead. This affects the
4864 fifth argument of getsockopt() amongst other things. This is now
4865 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4866 can be set for individual OS. I have set it for SunOS5, OSF1, and
4867 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4868 some earlier ones do not.
4870 7. Change 4.30/15 was not doing the test caselessly.
4872 8. The standard form for an IPv6 address literal was being rejected by address
4873 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4874 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4875 this, as well as the form without the "IPv6" on the front (but only when
4876 address literals are enabled, of course).
4878 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4880 10. Exim crashed if a message with an empty sender address specified by -f
4881 encountered a router with an errors_to setting. This could be provoked only
4882 by a command such as
4886 where an empty string was supplied; "<>" did not hit this bug.
4888 11. Installed PCRE release 4.5.
4890 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4891 remained set. It is now erased.
4893 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4894 times from message ids (which are base 36 rather than the normal 62).
4896 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4897 were being counted as actual protocol errors, and logged if the log
4898 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4899 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4900 and DATA following a set of rejected RCPTs do not count as protocol errors.
4901 In other words, Exim assumes they were pipelined, though this may not
4902 actually be the case. Of course, in all cases the client gets an
4903 appropriate error code.
4905 15. If a lookup fails in an ACL condition, a message about the failure may
4906 be available; it is used if testing the ACL cannot continue, because most
4907 such messages specify what the cause of the deferral is. However, some
4908 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4909 that caused an old message to be retained and used if a later statement
4910 caused a defer, replacing the real cause of the deferral.
4912 16. If an IP address had so many PTR records that the DNS lookup buffer
4913 was not large enough to hold them, Exim could crash while trying to process
4914 the truncated data. It now detects and logs this case.
4916 17. Further to 4.21/58, another change has been made: if (and only if) the
4917 first line of a message (the first header line) ends with CRLF, a bare LF
4918 in a subsequent header line has a space inserted after it, so as not to
4919 terminate the header.
4921 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4922 unnecessarily, used atoi() instead of strtol(), and didn't check the
4923 termination when getting file sizes from file names by regex.
4925 19. Completely re-implemented the support for maildirsize files, in the light
4926 of a number of problems with the previous contributed implementation
4927 (4.30/29). In particular:
4929 . If the quota is zero, the maildirsize file is maintained, but no quota is
4932 . If the maildir directory does not exist, it is created before any attempt
4933 to write a maildirsize file.
4935 . The quota value in the file is just a cache; if the quota is changed in
4936 the transport, the new value overrides.
4938 . A regular expression is available for excluding directories from the
4941 20. The autoreply transport checks the characters in options that define the
4942 message's headers; it allows continued headers, but it was checking with
4943 isspace() after an embedded newline instead of explicitly looking for a
4946 21. If all the "regular" hosts to which an address was routed had passed their
4947 expiry times, and had not reached their retry times, the address was
4948 bounced, even if fallback hosts were defined. Now Exim should go on to try
4951 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4952 equivalent code in the SMTP transport. Some hosts send humungous responses
4953 to HELO/EHLO, more than 1024 it seems.
4955 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4956 gives compiler warnings in some environments. I've now done it "properly",
4959 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4960 (because of problems with the built-in one) was declared to return uschar *
4961 instead of char *, causing compiler failure.
4963 25. Fixed a file descriptor leak when processing alias/forward files.
4965 26. Fixed a minor format string issue in dbfn.c.
4967 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4969 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4970 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4973 29. When a sender address is verified, it is cached, to save repeating the test
4974 when there is more than one recipient in a message. However, when the
4975 verification involves a callout, it is possible for different callout
4976 options to be set for different recipients. It is too complicated to keep
4977 track of this in the cache, so now Exim always runs a verification when a
4978 callout is required, relying on the callout cache for the optimization.
4979 The overhead is duplication of the address routing, but this should not be
4982 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4983 to be verified with callout=postmaster, and the main callout worked but the
4984 postmaster check failed, the verification correctly failed. However, if a
4985 subsequent RCPT command asked for sender verification *without* the
4986 postmaster check, incorrect caching caused this verification also to fail,
4989 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4990 it was not caching the DNS options (qualify_single, search_parents) that
4991 were used when the lookup failed. A subsequent lookup with different
4992 options therefore always gave the same answer, though there were cases
4993 where it should not have. (Example: a "domains = !$mx_any" option on a
4994 dnslookup router: the "domains" option is always processed without any
4995 widening, but the router might have qualify_single set.) Now Exim uses the
4996 cached value only when the same options are set.
4998 32. Added John Jetmore's "exipick" utility to the distribution.
5000 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5001 than a timeout (e.g. a certificate is required, and is not provided), an
5002 Exim server now closes the connection immediately. Previously it waited for
5003 the client to close - but if the client is SSL, it seems that they each
5004 wait for each other, leading to a delay before one of them times out.
5006 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5007 maintained 0.8.x compatibility because I don't think many are using it, and
5008 it is clearly obsolete.
5010 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5013 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5014 client certificate was expired. A simple patch fixes this, though I don't
5015 understand the full logic of why the verify callback is called multiple
5018 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5019 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5020 which causes problems with some clients (such as the Certicom SSL Plus
5021 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5022 disables the coutermeasure allowing Eudora to connect."
5024 38. Exim was not checking that a write() to a log file succeeded. This could
5025 lead to Bad Things if a log got too big, in particular if it hit a file
5026 size limit. Exim now panics and dies if it cannot write to a log file, just
5027 as it does if it cannot open a log file.
5029 39. Modified OS/Makefile-Linux so that it now contains
5031 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5033 The two -D definitions ensure that Exim is compiled with large file
5034 support, which makes it possible to handle log files that are bigger than
5037 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5038 instance) a domain was checked against a named list that involved a lookup,
5039 causing $domain_data to be set, then another domain was checked against the
5040 same list, then the first domain was re-checked, the value of $domain_data
5041 after the final check could be wrong. In particular, if the second check
5042 failed, it could be set empty. This bug probably also applied to
5045 41. The strip_trailing_dot option was not being applied to the address given
5046 with the -f command-line option.
5048 42. The code for reading a message's header from the spool was incrementing
5049 $received_count, but never initializing it. This meant that the value was
5050 incorrect (doubled) while delivering a message in the same process in which
5051 it was received. In the most common configuration of Exim, this never
5052 happens - a fresh exec is done - but it can happen when
5053 deliver_drop_privilege is set.
5055 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5056 it now includes up to 150 characters of the unexpected data in the log
5059 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5060 and building data strings. The size of both of these buffers was 10 000
5061 bytes - far larger than anybody would *ever* want, thought I. Needless to
5062 say, somebody hit the limit. I have increased the maximum line length to
5063 20 000 and the maximum data length of concatenated lines to 100 000. I have
5064 also fixed two bugs, because there was no checking on these buffers. Tsk,
5065 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5066 buffer is too small.
5068 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5069 lsearch lookups. Now it does.
5071 46. When parsing a route_list item in a manualroute router, a fixed-length
5072 buffer was used for the list of hosts. I made this 1024 bytes long,
5073 thinking that nobody would ever have a list of hosts that long. Wrong.
5074 Somebody had a whole pile of complicated expansion conditions, and the
5075 string was silently truncated, leading to an expansion error. It turns out
5076 that it is easier to change to an unlimited length (owing to other changes
5077 that have happened since this code was originally written) than to build
5078 structure for giving a limitation error. The length of the item that
5079 expands into the list of hosts is now unlimited.
5081 47. The lsearch lookup could not handle data where the length of text line was
5082 more than 4095 characters. Such lines were truncated, leading to shortened
5083 data being returned. It should now handle lines of any length.
5085 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5086 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5089 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5090 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5091 no longer happens in comment lines. A list of replacements is now placed
5092 at the head of all of the source files, except those whose only change is
5093 to replace PERL_COMMAND in the very first #! line.
5095 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5096 messages on the queue, with a bottom-up merge sort, using code contributed
5097 by Michael Haardt. This should make operations like -bp somewhat faster on
5098 large queues. It won't affect queue runners, except when queue_run_in_order
5101 51. Installed eximstats 1.31 in the distribution.
5103 52. Added support for SRV lookups to the dnslookup router.
5105 53. If an ACL referred to $message_body or $message_body_end, the value was not
5106 reset for any messages that followed in the same SMTP session.
5108 54. The store-handling optimization for building very long strings was not
5109 differentiating between the different store pools. I don't think this
5110 actually made any difference in practice, but I've tidied it.
5112 55. While running the routers to verify a sender address, $sender_address
5113 was still set to the sender address. This is wrong, because when routing to
5114 send a bounce to the sender, it would be empty. Therefore, I have changed
5115 it so that, while verifying a sender address, $sender_address is set to <>.
5116 (There is no change to what happens when verifying a recipient address.)
5118 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5119 target A or AAAA records (if not already returned) without resetting the
5120 qualify_single or search_parents options of the DNS resolver. These are
5121 inappropriate in this case because the targets of MX and SRV records must
5122 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5123 target that, when qualified, matched something in the local domain. These
5124 two options are now turned off when doing these lookups.
5126 57. It seems that at least some releases of Reiserfs (which does not have the
5127 concept of a fixed number of inodes) returns zero and not -1 for the
5128 number of available inodes. This interacted badly with check_spool_inodes,
5129 which assumed that -1 was the "no such thing" setting. What I have done is
5130 to check that the total number of inodes is greater than zero before doing
5131 the test of how many are available.
5133 58. When a "warn" ACL statement has a log_message modifier, the message is
5134 remembered, and not repeated. This is to avoid a lot of repetition when a
5135 message has many recipients that cause the same warning to be written.
5136 Howewer, Exim was preserving the list of already written lines for an
5137 entire SMTP session, which doesn't seem right. The memory is now reset if a
5138 new message is started.
5140 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5141 debugging output unless log_rewrite was also set.
5143 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5144 of (int)(handle) when we know that handle contains (void *)(-1).
5146 61. The Exim daemon panic-logs an error return when it closes the incoming
5147 connection. However "connection reset by peer" seems to be common, and
5148 isn't really an error worthy of noting specially, so that particular error
5151 62. When Exim is trying to find all the local interfaces, it used to panic and
5152 die if the ioctl to get the interface flags failed. However, it seems that
5153 on at least one OS (Solaris 9) it is possible to have an interface that is
5154 included in the list of interfaces, but for which you get a failure error
5155 for this call. This happens when the interface is not "plumbed" into a
5156 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5157 failure of the "get flags" call assumes that the interface is down.
5159 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5160 makes life easier for people who are doing arithmetic on fields extracted
5161 from dates, where you often get leading zeros that should not be
5162 interpreted as octal.
5164 64. Added qualify_domain to the redirect router, to override the global
5167 65. If a pathologically long header line contained very many addresses (the
5168 report of this problem mentioned 10 000) and each of them was rewritten,
5169 Exim could use up a very large amount of memory. (It kept on making new
5170 copies of the header line as it rewrote, and never released the old ones.)
5171 At the expense of a bit more processing, the header rewriting function has
5172 been changed so that it no longer eats memory in this way.
5174 66. The generation of the Received: header has been moved from the time that a
5175 message starts to be received, to the time that it finishes. The timestamp
5176 in the Received: header should now be very close to that of the <= log
5177 line. There are two side-effects of this change:
5179 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5180 logged header lines no longer include the local Received: line, because
5181 it has not yet been created. The same applies to a copy of the message
5182 that is returned to a non-SMTP sender when a message is rejected.
5184 (b) When a filter file is tested using -bf, no additional Received: header
5185 is added to the test message. After some thought, I decided that this
5188 This change does not affect the value of $received_for. It is still set
5189 after address rewriting, but before local_scan() is called.
5191 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5193 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5194 gave an unhelpful panic error message, and a defer error. I have managed to
5195 change this behaviour so that it now rejects any supplied certificate,
5196 which seems right, as the list of acceptable certificates is empty.
5198 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5199 gave an unhelpful defer error. I have not managed to make this reject any
5200 supplied certificates, but the error message it gives is "no certificate
5201 supplied", which is not helpful.
5203 70. exigrep's output now also includes lines that are not associated with any
5204 message, but which match the given pattern. Implemented by a patch from
5205 Martin Sluka, which also tidied up the Perl a bit.
5207 71. Recipient callout verification, like sender verification, was using <> in
5208 the MAIL FROM command. This isn't really the right thing, since the actual
5209 sender may affect whether the remote host accepts the recipient or not. I
5210 have changed it to use the actual sender in the callout; this means that
5211 the cache record is now keyed on a recipient/sender pair, not just the
5212 recipient address. There doesn't seem to be a real danger of callout loops,
5213 since a callout by the remote host to check the sender would use <>.
5214 [SEE ABOVE: changed after hitting problems.]
5216 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5217 temporary errors. However, in the case of such a code being given after
5218 the end of a data transmission (i.e. after ".") Exim was failing to write
5219 a retry record for the message. (Yes, there was some broken host that was
5220 actually sending 8xx at this point.)
5222 73. An unknown lookup type in a host list could cause Exim to panic-die when
5223 the list was checked. (An example that provoked this was putting <; in the
5224 middle of a list instead of at the start.) If this happened during a DATA
5225 ACL check, a -D file could be left lying around. This kind of configuration
5226 error no longer causes Exim to die; instead it causes a defer errror. The
5227 incident is still logged to the main and panic logs.
5229 74. Buglet left over from Exim 3 conversion. The message "too many messages
5230 in one connection" was written to the rejectlog but not the mainlog, except
5231 when address rewriting (yes!) was being logged.
5233 75. Added write_rejectlog option.
5235 76. When a system filter was run not as root (that is, when system_filter_user
5236 was set), the values of the $n variables were not being returned to the
5237 main process; thus, they were not subsequently available in the $sn
5240 77. Added +return_path_on_delivery log selector.
5242 78. A connection timeout was being treated differently from recipients deferred
5243 when testing hosts_max_try with a message that was older than the host's
5244 retry timeout. (The host should not be counted, thus allowing all hosts to
5245 be tried at least once before bouncing.) This may have been the cause of an
5246 occasionally reported bug whereby a message would remain on the queue
5247 longer than the retry timeout, but would be bounced if a delivery was
5248 forced. I say "may" because I never totally pinned down the problem;
5249 setting up timeout/retry tests is difficult. See also the next item.
5251 79. The ultimate address timeout was not being applied to errors that involved
5252 a combination of host plus message (for example, a timeout on a MAIL
5253 command). When an address resolved to a number of possible hosts, and they
5254 were not all tried for each delivery (e.g. because of hosts_max_try), a
5255 message could remain on the queue longer than the retry timeout.
5257 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5260 81. Fixed an obscure SMTP outgoing bug which required at least the following
5261 conditions: (a) there was another message waiting for the same server;
5262 (b) the server returned 5xx to all RCPT commands in the first message so
5263 that the message was not completed; (c) the server dropped the connection
5264 or gave a negative response to the RSET that Exim sends to abort the
5265 transaction. The observed case was a dropped connection after DATA that had
5266 been sent in pipelining mode. That is, the server had advertised PIPELINING
5267 but was not implementing it correctly. The effect of the bug was incorrect
5268 behaviour, such as trying another host, and this could lead to a crash.
5274 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5275 and daemon.c were passed as pointers to ints; they should have been
5276 pointers to socklen_t variables (which are typically unsigned ints).
5278 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5281 3. Fixed a really odd bug that affected only the testing scheme; patching a
5282 certain fixed string in the binary changed the value of another string that
5283 happened to be identical to the end of the original first string.
5285 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5286 name", it returns that address as the IP address. On some operating
5287 systems (e.g. Solaris), it also passes back the IP address string as the
5288 "host name". However, on others (e.g. Linux), it passes back an empty
5289 string. Exim wasn't checking for this, and was changing the host name to an
5290 empty string, assuming it had been canonicized.
5292 5. Although rare, it is permitted to have more than one PTR record for a given
5293 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5294 all the names associated with an address, because they do in Solaris.
5295 However, it seems that they do not in Linux for data that comes from the
5296 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5297 I found this out when I moved to a new Linux workstation and tried to run
5298 the Exim test suite.
5300 To get round this problem I have changed the code so that it now does its
5301 own call to the DNS to look up PTR records when searching for a host name.
5302 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5303 addresses that are only in /etc/hosts are still found.
5305 This behaviour is, however, controlled by an option called host_lookup_
5306 order, which defaults to "bydns:byaddr". If people want to use the other
5307 order, or indeed, just use one or the other means of lookup, they can
5308 specify it in this variable.
5310 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5311 some operating systems, this comes back from gethostbyaddr() as an empty
5312 string, and this is what Exim used to test for. However, it seems that in
5313 other systems, "." is yielded. Exim now tests for this case too.
5315 7. The values of check_spool_space and check_log_space are now held internally
5316 as a number of kilobytes instead of an absolute number of bytes. If a
5317 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5318 kilobyte. This means that much larger values can be stored.
5320 8. Exim monitor: an attempt to get the action menu when not actually pointing
5321 at a message produces an empty menu entitled "No message selected". This
5322 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5323 no entries in it ("Shell widget menu has zero width and/or height"). So I
5324 have added a single, blank menu entry in this case.
5326 9. Added ${quote_local_part.
5328 10. MIME decoding is now applied to the contents of Subject: header lines when
5331 11. Now that a reference to $sender_host_address automatically causes a reverse
5332 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5333 host lookup before query-style lookups in lists that might use this
5334 variable. This has therefore been abolished, and the "net-" prefix is no
5335 longer necessary for query-style lookups.
5337 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5338 have been a typo for LFLAGS, so it has been changed.
5340 13. The install script calls Exim with "-C /dev/null" in order to find the
5341 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5342 to be output. Howeve, since Exim outputs its version number before the
5343 error, it didn't break the script. It just looked ugly. I fixed this by
5344 always allowing "-C /dev/null" if the caller is root.
5346 14. Ignore overlarge ACL variable number when reading spool file - insurance
5347 against a later release with more variables having written the file.
5349 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5350 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5351 this, as well as the form without the "IPv6" on the front.
5353 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5354 OS/Makefile-Darwin file.
5356 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5357 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5359 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5360 variable. However, some OS use ints for inodes. I've added cast to long int
5361 to get rid of the compiler warning.
5363 19. I had forgotten to lock out "/../" in configuration file names when
5364 ALT_CONFIG_PREFIX was set.
5366 20. Routers used for verification do not need to specify transports. However,
5367 if such a router generated a host list, and callout was configured, Exim
5368 crashed, because it could not find a port number from the (non-existent)
5369 transport. It now assumes port 25 in this circumstance.
5371 21. Added the -t option to exigrep.
5373 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5374 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5375 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5376 them is set, LOOKUP_LSEARCH is forced.
5378 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5380 24. Added sender and host information to the "rejected by local_scan()" log
5381 line; previously there was no indication of these.
5383 25. Added .include_if_exists.
5385 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5386 Linux. It turns out that not all file systems support this. Apparently some
5387 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5388 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5389 not supported on the file descriptor, is now ignored when Exim is trying to
5390 sync a directory. This applies only to Linux.
5392 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5394 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5395 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5398 29. Added support for maildirsize files from supplied patch (modified a bit).
5400 30. The use of :fail: followed by an empty string could lead Exim to respond to
5401 sender verification failures with (e.g.):
5403 550 Verification failed for <xxx>
5404 550 Sender verify failed
5406 where the first response line was missing the '-' that indicates it is not
5407 the final line of the response.
5409 31. The loop for finding the name of the user that called Exim had a hardwired
5410 limit of 10; it now uses the value of finduser_retries, which is used for
5411 all other user lookups.
5413 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5416 33. Exim was neglecting to zero errno before one call of strtol() when
5417 expanding a string and expecting an integer value. On some systems this
5418 resulted in spurious "integer overflow" errors. Also, it was casting the
5419 result into an int without checking.
5421 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5422 did not work. The code looks as if it has *never* worked, though it appears
5423 to have been documented since at least releast 1.62. I have made it work.
5425 35. The "timeout_DNS" error in retry rules, also documented since at least
5426 1.62, also never worked. As it isn't clear exactly what this means, and
5427 clearly it isn't a major issue, I have abolished the feature by treating it
5428 as "timeout", and writing a warning to the main and panic logs.
5430 36. The display of retry rules for -brt wasn't always showing the error code
5433 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5434 timeout_connect_A, timeout_connect_MX.
5436 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5437 to the empty sender.
5439 39. The daemon was not analysing the content of -oX till after it had closed
5440 stderr and disconnected from the controlling terminal. This meant that any
5441 syntax errors were only noted on the panic log, and the return code from
5442 the command was 0. By re-arranging the code a little, I've made the
5443 decoding happen first, so such errors now appear on stderr, and the return
5444 code is 1. However, the actual setting up of the sockets still happens in
5445 the disconnected process, so errors there are still only recorded on the
5448 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5449 connections (as happens on some IP stacks) was logged at start up time as
5450 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5451 it from "IPv6 and IPv4", which means that two separate sockets are being
5454 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5455 says whether AF_INET or AF_INET6 was passed as an argument.
5457 42. Exiwhat output was messed up when time zones were included in log
5460 43. Exiwhat now gives more information about the daemon's listening ports,
5461 and whether -tls-on-connect was used.
5463 44. The "port" option of the smtp transport is now expanded.
5465 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5466 silently ignored. Now an error message is written to the main and panic
5469 46. There's a new ACL modifier called "logwrite" which writes to a log file
5470 as soon as it is encountered.
5472 47. Added $local_user_uid and $local_user_gid at routing time.
5474 48. Exim crashed when trying to verify a sender address that was being
5477 49. Exim was recognizing only a space character after ".include". It now also
5478 recognizes a tab character.
5480 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5481 extracting the relevant information from the specification. The man page no
5482 longer contains scrambled data for the -d option, and I've added a section
5483 at the front about calling Exim under different names.
5485 51. Added "extra_headers" argument to the "mail" command in filter files.
5487 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5490 53. Installed eximstats 1.29.
5492 54. Added transport_filter_timeout as a generic transport option.
5494 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5495 Cc: header lines. This was required by RFC 822, but it not required by RFC
5498 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5499 incoming messages that did not have them. Now it does so only if the
5500 message originates locally, that is, if there is no associated remote host
5501 address. When Resent- header lines are present, this applies to the Resent-
5502 lines rather than the non-Resent- lines.
5504 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5505 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5507 58. Messages for configuration errors now include the name of the main
5508 configuration file - useful now that there may be more than one file in a
5509 list (.included file names were always shown).
5511 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5512 for those rare installations that do not start the daemon as root or run it
5513 setuid root. I've cut out the call to initgroups() if the daemon is not
5516 60. The Exim user and group can now be bound into the binary as text strings
5517 that are looked up at the start of Exim's processing.
5519 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5521 62. Added $mailstore_basename variable.
5523 63. Installed patch to sieve.c from Michael Haardt.
5525 64. When Exim failed to open the panic log after failing to open the main log,
5526 the original message it was trying to log was written to stderr and debug
5527 output, but if they were not available (the usual case in production), it
5528 was lost. Now it is written to syslog before the two lines that record the
5529 failures to open the logs.
5531 65. Users' Exim filters run in subprocesses under the user's uid. It is
5532 possible for a "deliver" command or an alias in a "personal" command to
5533 provoke an address rewrite. If logging of address rewriting is configured,
5534 this fails because the process is not running as root or exim. There may be
5535 a better way of dealing with this, but for the moment (because 4.30 needs
5536 to be released), I have disabled address rewrite logging when running a
5537 filter in a non-root, non-exim process.
5543 1. The buildconfig auxiliary program wasn't quoting the value set for
5544 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5545 not defined. This bug was masked in 4.22 by the effect that was fixed in
5548 2. Some messages that were rejected after a message id was allocated were
5549 shown as "incomplete" by exigrep. It no longer does this for messages that
5550 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5552 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5553 have allow_domain_literals set, the ID did not get logged in the <= line.
5554 Domain literals are now always recognized in Message-ID: header lines.
5556 4. The first argument for a ${extract expansion item is the key name or field
5557 number. Leading and trailing spaces in this item were not being ignored,
5558 causing some misleading effects.
5560 5. When deliver_drop_privilege was set, single queue runner processes started
5561 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5562 same command in the process it spins off) were not dropping privilege.
5564 6. When the daemon running as "exim" started a queue runner, it always
5565 re-executed Exim in the spun-off process. This is a waste of effort when
5566 deliver_drop_privilege is set. The new process now just calls the
5567 queue-runner function directly.
5573 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5576 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5577 ignored. Though the use of -oP was forcing the writing of a pid file, it
5578 was always written to the default place.
5580 3. If the message "no IP address found for host xxxx" is generated during
5581 incoming verification, it is now followed by identification of the incoming
5582 connection (so you can more easily find what provoked it).
5584 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5586 5. Added some features to "harden" Exim a bit more against certain attacks:
5588 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5589 be put in Local/Makefile. This is like the never_users runtime option,
5590 but it cannot be overridden. The default setting is "root".
5592 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5593 prefix string with which any file named in a -C command line option
5596 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5597 is retained for -C and -D only if the caller of Exim is root. Without
5598 it, the exim user may also use -C and -D and retain privilege.
5600 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5601 command line option is disabled.
5603 6. Macro names set by the -D option must start with an upper case letter, just
5604 like macro names defined in the configuration file.
5606 7. Added "dereference=" facility to LDAP.
5608 8. Two instances of the typo "uknown" in the source files are fixed.
5610 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5611 the Configure-Makefile script screwed up while processing it.
5613 10. Incorporated PCRE 4.4.
5615 11. The SMTP synchronization check was not operating right at the start of an
5616 SMTP session. For example, it could not catch a HELO sent before the client
5617 waited for the greeting. There is now a check for outstanding input at the
5618 point when the greeting is written. Because of the duplex, asynchronous
5619 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5620 way, but not yet received, when the check is performed.
5622 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5623 on TCP/IP sockets, because this apparently causes some broken clients to
5626 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5627 unchanged) from the Cygwin maintainer.
5629 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5630 was supported instead of testing for mbx. Effectively a typo.
5632 15. The spa authenticator server code was not checking that the input it
5633 received was valid base64.
5635 16. The debug output line for the "set" modifier in ACLs was not showing the
5636 name of the variable that was being set.
5638 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5640 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5641 lookup on its own. Something else was needed to trigger the lookup. For
5642 example, a match in host_lookup or the need for a host name in a host list.
5643 Now, if $sender_host_name is referenced and the host name has not yet been
5644 looked up, a lookup is performed. If the lookup fails, the variable remains
5645 empty, and $host_lookup_failed is set to "1".
5647 19. Added "eqi" as a case-independent comparison operator.
5649 20. The saslauthd authentication condition could segfault if neither service
5650 nor realm was specified.
5652 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5653 error message that was logged was misleading, and incoming SMTP
5654 connections were dropped. The message is now more accurate, and temporary
5655 errors are given to SMTP connections.
5657 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5658 (except RSET) with a 421 error, until QUIT is received. However, it was
5659 failing to send a response to QUIT.
5661 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5662 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5663 ACL is now run after the helo_try_verify_hosts code.
5665 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5666 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5667 case-independent, so other case variants are also recognized). Apparently
5668 some systems use these upper case variants.
5670 25. If more than two messages were waiting for the same host, and a transport
5671 filter was specified for the transport, Exim sent two messages over the
5672 same TCP/IP connection, and then failed with "socket operation on non-
5673 socket" when it tried to send the third.
5675 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5677 27. The extern definition of crypt16() in expand.c was not being excluded when
5678 the OS had its own crypt16() function.
5680 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5681 as a preferred synonym for return_size_limit, both as an option and as an
5684 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5686 30. Changed the default configuration ACL to relax the local part checking rule
5687 for addresses that are not in any local domains. For these addresses,
5688 slashes and pipe symbols are allowed within local parts, but the sequence
5689 /../ is explicitly forbidden.
5691 31. SPA server authentication was not clearing the challenge buffer before
5694 32. log_message in a "warn" ACL statement was writing to the reject log as
5695 well as to the main log, which contradicts the documentation and doesn't
5696 seem right (because no rejection is happening). So I have stopped it.
5698 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5699 However, I am unable to do any testing of this.
5701 34. Fixed an infelicity in the appendfile transport. When checking directories
5702 for a mailbox, to see if any needed to be created, it was accidentally
5703 using path names with one or more superfluous leading slashes; tracing
5704 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5706 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5707 contents are added to the log line that is written for every discarded
5708 recipient. (Previously a log_message setting was ignored.)
5710 36. The ${quote: operator now quotes the string if it is empty.
5712 37. The install script runs exim in order to find its version number. If for
5713 some reason other than non-existence or emptiness, which it checks, it
5714 could not run './exim', it was installing it with an empty version number,
5715 i.e. as "exim-". This error state is now caught, and the installation is
5718 38. An argument was missing from the function that creates an error message
5719 when Exim fails to connect to the socket for saslauthd authentication.
5720 This could cause Exim to crash, or give a corrupted message.
5722 39. Added isip, isip4, and isip6 to ${if conditions.
5724 40. The ACL variables $acl_xx are now saved with the message, and can be
5725 accessed later in routers, transports, and filters.
5727 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5728 strings in the file are not string-expanded.
5730 42. If a MAIL command specified a SIZE value that was too large to fit into an
5731 int variable, the check against message_size_limit failed. Such values are
5732 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5733 day this will have to be increased, but I don't think I want to be around
5734 when emails are that large.
5741 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5742 iconv() is not standard in FreeBSD.
5744 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5745 IPv6 enabled. The observed symptom was a segmentation fault on return from
5746 the function os_common_find_running_interfaces() in src/os.c.
5748 3. In the check_special_case() function in daemon.c I had used "errno" as an
5749 argument name, which causes warnings on some systems. This was basically a
5750 typo, since it was named "eno" in the comments!
5752 4. The code that waits for the clock to tick (at a resolution of some fraction
5753 of a second) so as to ensure message-id uniqueness was always waiting for
5754 at least one whole tick, when it could have waited for less. [This is
5755 almost certainly not relevant at current processor speeds, where it is
5756 unlikely to ever wait at all. But we try to future-proof.]
5758 5. The function that sleeps for a time interval that includes fractions of a
5759 second contained a race. It did not block SIGALRM between setting the
5760 timer, and suspending (a couple of lines later). If the interval was short
5761 and the sigsuspend() was delayed until after it had expired, the suspension
5762 never ended. On busy systems this could lead to processes getting stuck for
5765 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5766 process, before it forks any delivery processes. The open lookup caching
5767 mechanism meant that the open file or database connection was passed into
5768 the delivery process. The problem was that delivery processes always tidy
5769 up cached lookup data. This could cause a problem for the next delivery
5770 process started by the queue runner, because the external queue runner
5771 process does not know about the closure. So the next delivery process
5772 still has data in the lookup cache. In the case of a file lookup, there was
5773 no problem because closing a file descriptor in a subprocess doesn't affect
5774 the parent. However, if the lookup was caching a connection to a database,
5775 the connection was closed, and the second delivery process was likely to
5776 see errors such as "PGSQL: query failed: server closed the connection
5777 unexpectedly". The problem has been fixed by closing all cached lookups
5778 in a queue runner before running a delivery process.
5780 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5781 seem to have the "const" qualifier which it has on other OS. I've
5784 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5785 *of the same type* (client or server) with the same public name that an
5786 error should be diagnosed.
5788 9. When Exim looked up a host name for an IP address, but failed to find the
5789 original IP address when looking up the host name (a safety check), it
5790 output the message "<ip address> does not match any IP for NULL", which was
5791 confusing, to say the least. The bug was that the host name should have
5792 appeared instead of "NULL".
5794 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5795 user that is built into the binary, and the -C or -D options is used, root
5796 privilege is dropped before the configuration file is read. In addition,
5797 logging is switched to stderr instead of the normal log files. If the
5798 configuration then re-defines the Exim user, the unprivileged environment
5799 is probably not what is expected, so Exim logs a panic warning message (but
5802 However, if deliver_drop_privilege is set, the unprivileged state may well
5803 be exactly what is intended, so the warning has been cut out in that case,
5804 and Exim is allowed to try to write to its normal log files.
5810 1. smtp_return_error_details was not giving details for temporary sender
5811 or receiver verification errors.
5813 2. Diagnose a configuration error if two authenticators have the same public
5816 3. Exim used not to create the message log file for a message until the first
5817 delivery attempt. This could be confusing when incoming messages were held
5818 for policy or load reasons. The message log file is now created at the time
5819 the message is received, and an initial "Received" line is written to it.
5821 4. The automatically generated man page for command line options had a minor
5822 bug that caused no ill effects; however, a more serious problem was that
5823 the procedure for building the man page automatically didn't always
5824 operate. Consequently, release 4.20 contains an out-of-date version. This
5825 shouldn't happen again.
5827 5. When building Exim with embedded Perl support, the script that builds the
5828 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5829 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5831 6. The freeze_tell option was not being used for messages that were frozen on
5832 arrival, either by an ACL or by local_scan().
5834 7. Added the smtp_incomplete_transaction log selector.
5836 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5837 was accepting AUTH without a new EHLO.
5839 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5840 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5843 10. Logging of TCP/IP connections (when configured) now happens in the main
5844 daemon process instead of the child process, so that the TCP/IP connection
5845 count is more accurate (but it can never be perfect).
5847 11. The use of "drop" in a nested ACL was not being handled correctly in the
5848 outer ACL. Now, if condition failure induced by the nested "drop" causes
5849 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5850 or "require"), the connection is dropped.
5852 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5853 that yield "discard" can now be used with an "accept" or a "discard" verb,
5854 but an error is generated for any others (because I can't see a useful way
5855 to define what should happen).
5857 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5858 are now processed in the same way as lines in the Exim configuration file.
5859 In particular, continuation lines are supported.
5861 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5863 15. Added -ti meaning -t -i.
5865 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5866 domains, and warn by logging if others are found.
5868 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5869 returned from GIFCONF when Exim is trying to find the list of interfaces on
5870 a host. The code in os.c has been modified to copy each ifreq to an aligned
5871 structure in all cases.
5873 Also, in some cases, the returned ifreq's were being copied to a 'struct
5874 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5875 means the last couple of bytes of an IPv6 address could be chopped if the
5876 ifreq contained only a normal sockaddr (14 bytes storage).
5878 18. Named domain lists were not supported in the hosts_treat_as_local option.
5879 An entry such as +xxxx was not recognized, and was treated as a literal
5882 19. Ensure that header lines added by a DATA ACL are included in the reject log
5883 if the ACL subsequently rejects the message.
5885 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5886 MD5 (which is deprecated).
5888 21. When testing a filter file using -bf, Exim was writing a message when it
5889 took the sender from a "From " line in the message, but it was not doing so
5890 when it took $return_path from a Return-Path: header line. It now does.
5892 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5893 with a valid header line field name (a series of printing characters
5894 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5896 23. Changed "disc" in the source to "disk" to conform to the documentation and
5897 the book and for uniformity.
5899 24. Ignore Sendmail's -Ooption=value command line item.
5901 25. When execve() failed while trying to run a command in a pipe transport,
5902 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5903 could be confused with a return value of 69 from the command itself. This
5904 has been changed to 127, the value the shell returns if it is asked to run
5905 a non-existent command. The wording for the related log line suggests a
5906 non-existent command as the problem.
5908 26. If received_header_text expands to an empty string, do not add a Received:
5909 header line to the message. (Well, it adds a token one on the spool, but
5910 marks it "old" so that it doesn't get used or transmitted.)
5912 27. Installed eximstats 1.28 (addition of -nt option).
5914 28. There was no check for failure on the call to getsockname() in the daemon
5915 code. This can fail if there is a shortage of resources on the system, with
5916 ENOMEM, for example. A temporary error is now given on failure.
5918 29. Contrary to the C standard, it seems that in some environments, the
5919 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5920 program. Exim now does this explicitly; it affects the formatting of
5921 timestamps using strftime().
5923 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5924 complaints. I've now initialized all the variables, to avoid this.
5926 32. Header lines added by a system filter were not being "seen" during
5927 transport-time rewrites.
5929 33. The info_callback() function passed to OpenSSL is set up with type void
5930 (*)(SSL *, int, int), as described somewhere. However, when calling the
5931 function (actually a macro) that sets it up, the type void(*)() is
5932 expected. I've put in a cast to prevent warnings from picky compilers.
5934 34. If a DNS black list lookup found a CNAME record, but there were no A
5935 records associated with the domain it pointed at, Exim crashed.
5937 35. If a DNS black list lookup returned more than one A record, Exim ignored
5938 all but the first. It now scans all returned addresses if a particular IP
5939 value is being sought. In this situation, the contents of the
5940 $dnslist_value variable are a list of all the addresses, separated by a
5943 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5944 to accept a host name and all its aliases if the forward lookup for any of
5945 them yielded the IP address of the incoming connection. Now it accepts only
5946 those names whose forward lookup yields the correct IP address. Any other
5947 names are discarded. This closes a loophole whereby a rogue DNS
5948 administrator could create reverse DNS records to break through a
5949 wildcarded host restriction in an ACL.
5951 37. If a user filter or a system filter that ran in a subprocess used any of
5952 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5953 the wrong values were passed to the pipe command ($thisaddress had the
5954 value of $0, $0 had the value of $1, etc). This bug was introduced by
5955 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5957 38. Improved the line breaking for long SMTP error messages from ACLs.
5958 Previously, if there was no break point between 40 and 75 characters, Exim
5959 left the rest of the message alone. Two changes have been made: (a) I've
5960 reduced the minimum length to 35 characters; (b) if it can't find a break
5961 point between 35 and 75 characters, it looks ahead and uses the first one
5962 that it finds. This may give the occasional overlong line, but at least the
5963 remaining text gets split now.
5965 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5966 file descriptors might be low, and that setting 1000 would always raise it.
5967 It turns out that in some environments, the limit is already over 1000 and
5968 that lowering it causes trouble. So now Exim takes care not to decrease it.
5970 40. When delivering a message, the value of $return_path is set to $sender_
5971 address at the start of routing (routers may change the value). By an
5972 oversight, this default was not being set up when an address was tested by
5973 -bt or -bv, which affected the outcome if any router or filter referred to
5976 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5977 log only when "message" or "log_message" are set. However, if one of the
5978 conditions was an address verification, or a call to a nested ACL, the
5979 messages generated by the underlying test were being passed through. This
5980 no longer happens. The underlying message is available in $acl_verify_
5981 message for both "message" and "log_message" expansions, so it can be
5982 passed through if needed.
5984 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5985 new expansion $bh_ to give the encoded byte string without charset
5986 translation. Translation happens only if iconv() is available; HAVE_ICONV
5987 indicates this at build time. HEADERS_CHARSET gives the charset to
5988 translate to; headers_charset can change it in the configuration, and
5989 "headers charset" can change it in an individual filter file.
5991 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5992 that creates RFC 2047 encoded "words" labels them as that charset instead
5993 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5994 expansion operator; (ii) when Exim creates a From: line for a local
5995 message; (iii) when a header line is rewritten to include a "phrase" part.
5997 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5998 buggy, causing it to skip the first lines of messages whose message ID
5999 ended in 'D'. This would not have bitten before Exim release 4.14, because
6000 message IDs were unlikely to end in 'D' before then. The effect was to have
6001 incorrect size information for certain domains.
6003 45. #include "config.h" was missing at the start of the crypt16.c module. This
6004 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6007 46. If there was a timeout during a "random" callout check, Exim treated it as
6008 a failure of the random address, and carried on sending RSET and the real
6009 address. If the delay was just some slowness somewhere, the response to the
6010 original RCPT would be taken as a response to RSET and so on, causing
6011 mayhem of various kinds.
6013 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6014 when I implemented it. It didn't allow for the fact that some option values
6015 may legitimatetly be negative (e.g. size_addition), and it didn't even do
6016 the right test for positive values.
6018 48. Domain names in DNS records are case-independent. Exim always looks them up
6019 in lower case. Some resolvers return domain names in exactly the case they
6020 appear in the zone file, that is, they may contain uppercase letters. Not
6021 all resolvers do this - some return always lower case. Exim was treating a
6022 change of case by a resolver as a change of domain, similar to a widening
6023 of a domain abbreviation. This triggered its re-routing code and so it was
6024 trying to route what was effectively the same domain again. This normally
6025 caused routing to fail (because the router wouldn't handle the domain
6026 twice). Now Exim checks for this case specially, and just changes the
6027 casing of the domain that it ultimately uses when it transmits the message
6030 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6033 50. If a filter generated a file delivery with a non-absolute name (possible if
6034 no home directory exists for the router), the forbid_file option was not
6037 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6038 the existing equality matching.
6040 52. Exim was using ints instead of ino_t variables in some places where it was
6041 dealing with inode numbers.
6043 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6044 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6045 called TMPDIR, and if it finds it is different, it changes its value.
6047 54. The smtp_printf() function is now made available to local_scan() so
6048 additional output lines can be written before returning. There is also an
6049 smtp_fflush() function to enable the detection of a dropped connection.
6050 The variables smtp_input and smtp_batched_input are exported to
6053 55. Changed the default runtime configuration: the message "Unknown user"
6054 has been removed from the ACL, and instead placed on the localuser router,
6055 using the cannot_route_message feature. This means that any verification
6056 failures that generate their own messages won't get overridden. Similarly,
6057 the "Unrouteable address" message that was in the ACL for unverifiable
6058 relay addresses has also been removed.
6060 56. Added hosts_avoid_esmtp to the smtp transport.
6062 57. The exicyclog script was not checking for the esoteric option
6063 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6064 will work only if exicyclog is run under the appropriate euid.
6066 58. Following a discussion on the list, the rules by which Exim recognises line
6067 endings on incoming messages have been changed. The -dropcr and drop_cr
6068 options are now no-ops, retained only for backwards compatibility. The
6069 following line terminators are recognized: LF CRLF CR. However, special
6070 processing applies to CR:
6072 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6073 nor a local message in the state where . is a terminator.
6075 (ii) If a bare CR is encountered in a header line, an extra space is added
6076 after the line terminator so as not to end the header. The reasoning
6077 behind this is that bare CRs in header lines are most likely either
6078 to be mistakes, or people trying to play silly games.
6080 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6081 was being incorrectly given as 18 bytes larger than it should have been.
6082 This is a VOB (very old bug).
6084 60. This may never have affected anything current, but just in case it has:
6085 When the local host is found other than at the start of a list of hosts,
6086 the local host, those with the same MX, and any that follow, are discarded.
6087 When the list in question was part of a longer list of hosts, the following
6088 hosts (not currently being processed) were also being discarded. This no
6089 longer happens. I'm not sure if this situation could ever has previously
6092 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6095 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6096 header. This is something that is recommended in a new Internet Draft, and
6097 is something that is documented as being done by Sendmail. There are two
6098 possible values. For messages generated by the autoreply transport, Exim
6101 Auto-Submitted: auto-replied
6103 whereas for all other generated messages (e.g. bounces) it adds
6105 Auto-Submitted: auto-generated
6107 63. The "personal" condition in filters now includes a test for the
6108 Auto-Submitted: header. If it contains the string "auto-" the message it
6109 not considered personal.
6111 64. Added rcpt_include_affixes as a generic transport option.
6113 65. Added queue_only_override (default true).
6115 66. Added the syslog_duplication option.
6117 67. If what should have been the first header line of a message consisted of
6118 a space followed by a colon, Exim was mis-interpreting it as a header line.
6119 It isn't of course - it is syntactically invalid and should therefore be
6120 treated as the start of the message body. The misbehaviour could have
6121 caused a number of strange effects, including loss of data in subsequent
6122 header lines, and spool format errors.
6124 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6125 client host had authenticated. This control can now be exercised by an ACL
6126 for more flexibility.
6128 69. By default, callouts do not happen when testing with -bh. There is now a
6129 variant, -bhc, which does actually run the callout code, including
6130 consulting and updating the callout cache.
6132 70. Added support for saslauthd authentication, courtesy of Alexander
6135 71. If statvfs() failed on the spool or log directories while checking their
6136 size for availability, Exim confusingly gave the error "space shortage".
6137 Furthermore, in debugging mode it crashed with a floating point exception.
6138 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6139 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6140 serious problem, Exim now writes to the main and panic logs when this
6141 happens, with details of the failure. It then refuses to accept the
6142 incoming message, giving the message "spool directory problem" or "log
6143 directory problem" with a 421 code for SMTP messages.
6145 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6146 0, 1, and 2 exist, because some OS complain for execs without them (see
6147 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6148 descriptors. However, the code omitted to check that the open succeeded,
6149 causing mysterious errors if for some reason the permissions on /dev/null
6150 got screwed. Now Exim writes a message to the main and panic logs, and
6151 bombs out if it can't open /dev/null.
6153 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6154 interact so that it is all more flexible. It is supposed to remain
6155 backwards compatible. Also added extra_local_interfaces.
6157 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6158 to bomb out with an assertion failure - to the client this appears as a
6159 connection drop. This problem occurs in the part of the code that was taken
6160 from the Samba project. Fortunately, the assertion is in a very simple
6161 function, so I have fixed this by reproducing the function inline in the
6162 one place where it is called, and arranging for authentication to fail
6163 instead of killing the process with assert().
6165 75. The SPA client code was not working when the server requested OEM rather
6166 than Unicode encoding.
6168 76. Added code to make require_files with a specific uid setting more usable in
6169 the case where statting the file as root fails - usually a non-root-mounted
6170 NFS file system. When this happens and the failure is EACCES, Exim now
6171 forks a subprocess and does the per-uid checking as the relevant uid.
6173 77. Added process_log_path.
6175 78. If log_file_path was not explicitly set, a setting of check_log_space or
6176 check_log_inodes was ignored.
6178 79. If a space check for the spool or log partitions fails, the incident is now
6179 logged. Of course, in the latter case the data may get lost...
6181 80. Added the %p formatting code to string_format() so that it can be used to
6182 print addresses in debug_print(). Adjusted all the address printing in the
6183 debugging in store.c to use %p rather than %d.
6185 81. There was a concern that a line of code in smtp_in.c could overflow a
6186 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6187 initially expressed, the concern was not well-founded, because trailing
6188 spaces are removed early. However, if the trailing spaces were followed by
6189 a NULL, they did not get removed, so the overflow was possible. Two fixes
6192 (a) I re-wrote the offending code in a cleaner fashion.
6193 (b) If an incoming SMTP command contains a NULL character, it is rejected
6196 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6197 runs initgroups(), so that if the Exim user is in any additional groups,
6198 they will be used during message reception.
6204 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob