1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
12 than -2003 did; needs libidn2 in addition to libidn.
14 JH/02 The path option on a pipe transport is now expanded before use.
16 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
17 Patch provided by "Björn", documentation fix added too.
19 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
20 missing a wire-to-host endian conversion.
22 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
23 close after a BDAT command line could be taken as a following command,
24 giving a synch failure. Fix by only checking for synch immediately
25 before acknowledging the chunk.
27 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
28 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
29 macro. Patches provided by Josh Soref.
31 JH/05 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
32 the dkim code may be unix-mode line endings rather than smtp wire-format
33 CRLF, so prepend a CR to any bare LF.
38 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
39 supports it and a size is available (ie. the sending peer gave us one).
41 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
42 years of being deprecated). The replacements are the ACLs
43 acl_smtp_mime and acl_not_smtp_mime.
45 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
46 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
47 or even an in-clear connection were permitted. Now, if the host lookup
48 was dnssec and dane was requested then the host is only used if the
49 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
50 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
51 if one fails this test.
52 This means that a poorly-configured remote DNS will make it incommunicado;
53 but it protects against a DNS-interception attack on it.
55 JH/04 Bug 1810: make continued-use of an open smtp transport connection
56 non-noisy when a race steals the message being considered.
58 JH/05 If main configuration option tls_certificate is unset, generate a
59 self-signed certificate for inbound TLS connections.
61 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
62 in rewrites and routers.
64 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
65 and logged a warning sing 4.83; now they are a configuration file error.
67 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
68 (lacking @domain). Apply the same qualification processing as RCPT.
70 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
72 JH/10 Support ${sha256:} applied to a string (as well as the previous
75 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
76 a cutthrough deliver is pending, as we always want to make a connection.
77 This also avoids re-routing the message when later placing the cutthrough
78 connection after a verify cache hit.
79 Do not update it with the verify result either.
81 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
82 when routing results in more than one destination address.
84 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
85 signing (which inhibits the cutthrough capability). Previously only
86 the presence of an option was tested; now an expansion evaluating as
87 empty is permissible (obviously it should depend only on data available
88 when the cutthrough connection is made).
90 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
91 the relevant preceding SMTP command did not note the pipelining mode.
93 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
94 Previously they were not counted.
96 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
97 as one having no matching records. Previously we deferred the message
98 that needed the lookup.
100 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
101 distinguished as "(=".
103 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
104 for missing MX records. Previously it only worked for missing A records.
106 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
108 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
109 after the data-go-ahead and data-ack. Patch from Jason Betts.
111 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
112 even for a "none" policy. Patch from Tony Meyer.
114 JH/22 Fix continued use of a connection for further deliveries. If a port was
115 specified by a router, it must also match for the delivery to be
118 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
119 When one of the recipients of a message was unsuitable for the connection
120 (has no matching addresses), we lost track of needing to mark it
121 deferred. As a result mail would be lost.
123 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
125 JH/25 Decoding ACL controls is now done using a binary search; the source code
126 takes up less space and should be simpler to maintain. Merge the ACL
127 condition decode tables also, with similar effect.
129 JH/26 Fix problem with one_time used on a redirect router which returned the
130 parent address unchanged. A retry would see the parent address marked as
131 delivered, so not attempt the (identical) child. As a result mail would
134 JH/27 Fix a possible security hole, wherein a process operating with the Exim
135 UID can gain a root shell. Credit to http://www.halfdog.net/ for
136 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
139 JH/28 Enable {spool,log} filesystem space and inode checks as default.
140 Main config options check_{log,spool}_{inodes,space} are now
141 100 inodes, 10MB unless set otherwise in the configuration.
143 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
144 Previously it only applied to the main-section connection policy
147 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
149 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
150 by me. Added RFC7919 DH primes as an alternative.
152 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
153 are not in the system include path.
155 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
156 GnuTLS, when a session startup failed (eg because the client disconnected)
157 Exim did stdio operations after fclose. This was exposed by a recent
158 change which nulled out the file handle after the fclose.
160 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
161 signed directly by the cert-signing cert, rather than an intermediate
162 OCSP-signing cert. This is the model used by LetsEncrypt.
164 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
166 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
167 an incoming connection.
169 HS/02 Bug 1802: Do not half-close the connection after sending a request
172 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
173 fallback to "prime256v1".
175 JH/34 SECURITY: Use proper copy of DATA command in error message.
176 Could leak key material. Remotely exploitable. CVE-2016-9963.
182 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
183 and 3.4.4 - once the server is enabled to respond to an OCSP request
184 it does even when not requested, resulting in a stapling non-aware
185 client dropping the TLS connection.
187 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
188 support variable-length bit vectors. No functional change.
190 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
191 The I= interface field on outgoing lines is now after the H= remote
192 host field, same as incoming lines. There is a separate
193 outgoing_interface log selector which allows you to disable the
196 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
197 If not running log_selector +smtp_connection the mainlog would be held
198 open indefinitely after a "too many connections" event, including to a
199 deleted file after a log rotate. Leave the per net connection logging
200 leaving it open for efficiency as that will be quickly detected by the
201 check on the next write.
203 HS/01 Bug 1671: Fix post transport crash.
204 Processing the wait-<transport> messages could crash the delivery
205 process if the message IDs didn't exist for some reason. When
206 using 'split_spool_directory=yes' the construction of the spool
207 file name failed already, exposing the same netto behaviour.
209 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
210 mime_regex ACL conditions.
212 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
213 to DSN fail messages (bounces): remote IP, remote greeting, remote response
214 to HELO, local diagnostic string.
216 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
217 log line to debug. Even when configured with a tls authenticator many
218 client connections are expected to not authenticate in this way, so
219 an authenticate fail is not an error.
221 HS/02 Add the Exim version string to the process info. This way exiwhat
222 gives some more detail about the running daemon.
224 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
225 matter for fast-change records such as DNSBLs.
227 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
228 retry record, even if constant. There may be multiple transports with
229 different interface settings and the retry behaviour needs to be kept
232 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
234 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
236 JH/10 Bug 840: fix log_defer_output option of pipe transport
238 JH/11 Bug 830: use same host for all RCPTS of a message, even under
239 hosts_randomize. This matters a lot when combined with mua_wrapper.
241 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
242 ${quote_pgsql:<string>} operator.
244 JH/13 Bug 1708: avoid misaligned access in cached lookup.
246 JH/14 Change header file name for freeradius-client. Relevant if compiling
247 with Radius support; from the Gentoo tree and checked under Fedora.
249 JH/15 Bug 1712: Introduce $prdr_requested flag variable
251 JH/16 Bug 1714: Permit an empty string as expansion result for transport
252 option transport_filter, meaning no filtering.
254 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
256 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
257 defaults to "*" (all hosts). The variable is now available when not built
258 with TLS, default unset, mainly to enable keeping the testsuite sane.
259 If a server certificate is not supplied (via tls_certificate) an error is
260 logged, and clients will find TLS connections fail on startup. Presumably
261 they will retry in-clear.
262 Packagers of Exim are strongly encouraged to create a server certificate
263 at installation time.
265 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
266 with the $config_file variable.
268 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
269 in transport context, after the attempt, and per-recipient. The latter type
270 is per host attempted. The event data is the error message, and the errno
271 information encodes the lookup type (A vs. MX) used for the (first) host,
272 and the trailing two digits of the smtp 4xx response.
274 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
275 to write to mainlog (or rejectlog, paniclog) in the window between file
276 creation and permissions/ownership being changed. Particularly affects
277 installations where exicyclog is run as root, rather than exim user;
278 result is that the running daemon panics and dies.
280 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
282 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
283 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
284 "pri" and "weight". Note that the previous implicit priority given by the
285 list order is no longer honoured.
287 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
290 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
291 by defining SUPPORT_SOCKS.
293 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
294 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
295 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
296 variables are renamed to proxy_{local,external}_{address,port}.
298 JH/27 Move Internationalisation support from Experimental to mainline, enabled
299 for a build by defining SUPPORT_I18N
301 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
302 of the query string, and make ${quote_redis:} do that quoting.
304 JH/29 Move Events support from Experimental to mainline, enabled by default
305 and removable for a build by defining DISABLE_EVENT.
307 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
309 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
310 cached by the daemon.
312 JH/32 Move Redis support from Experimental to mainline, enabled for a build
313 by defining LOOKUP_REDIS. The libhiredis library is required.
315 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
316 keys are given for lookup.
318 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
319 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
320 only supported when built with TLS support. The PolarSSL SHA routines
321 are still used when the TLS library is too old for convenient support.
323 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
324 openssl_options), for security. OpenSSL forces this from version 1.1.0
325 server-side so match that on older versions.
327 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
328 allocation for $value could be released as the expansion processing
329 concluded, but leaving the global pointer active for it.
331 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
332 and to use the domains and local_parts ACL conditions.
334 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
335 incorrectly not doubled on cutthrough transmission, hence seen as a
336 body-termination at the receiving system - resulting in truncated mails.
337 Commonly the sender saw a TCP-level error, and retransmitted the message
338 via the normal store-and-forward channel. This could result in duplicates
339 received - but deduplicating mailstores were liable to retain only the
340 initial truncated version.
342 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
344 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
346 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
347 we're in there, support oversigning also; bug 1309.
349 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
351 HS/04 Add support for keep_environment and add_environment options.
353 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
354 either intentional arithmetic overflow during PRNG, or testing config-
357 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
358 delivery resulted in actual delivery. Cancel cutthrough before DATA
361 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
362 rejects a recipient: pass the reject to the originator.
364 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
365 Many were false-positives and ignorable, but it's worth fixing the
368 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
369 for the new environment-manipulation done at startup. Move the routines
370 from being local to tls.c to being global via the os.c file.
372 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
373 an extract embedded as result-arg for a map, the first arg for extract
374 is unavailable so we cannot tell if this is a numbered or keyed
375 extraction. Accept either.
381 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
384 JH/02 The smtp transport option "multi_domain" is now expanded.
386 JH/03 The smtp transport now requests PRDR by default, if the server offers
389 JH/04 Certificate name checking on server certificates, when exim is a client,
390 is now done by default. The transport option tls_verify_cert_hostnames
391 can be used to disable this per-host. The build option
392 EXPERIMENTAL_CERTNAMES is withdrawn.
394 JH/05 The value of the tls_verify_certificates smtp transport and main options
395 default to the word "system" to access the system default CA bundle.
396 For GnuTLS, only version 3.0.20 or later.
398 JH/06 Verification of the server certificate for a TLS connection is now tried
399 (but not required) by default. The verification status is now logged by
400 default, for both outbound TLS and client-certificate supplying inbound
403 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
406 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
407 Status Notification (bounce) messages are now MIME format per RFC 3464.
408 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
409 under the control of the dsn_advertise_hosts option, and routers may
410 have a dsn_lasthop option.
412 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
413 default, modifiable by a malware= option. The list separator for
414 the options can now be changed in the usual way. Bug 68.
416 JH/10 The smtp_receive_timeout main option is now expanded before use.
418 JH/11 The incoming_interface log option now also enables logging of the
419 local interface on delivery outgoing connections.
421 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
422 if the interface and destination host and port all match.
424 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
427 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
428 Patch from Andrew Lewis.
430 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
431 now supports optional time-restrictions, weighting, and priority
432 modifiers per server. Patch originally by <rommer@active.by>.
434 JH/16 The spamd_address main option now supports a mixed list of local
435 and remote servers. Remote servers can be IPv6 addresses, and
436 specify a port-range.
438 JH/17 Bug 68: The spamd_address main option now supports an optional
439 timeout value per server.
441 JH/18 Bug 1581: Router and transport options headers_add/remove can
442 now have the list separator specified.
444 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
447 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
450 JH/21 Support for the A6 type of dns record is withdrawn.
452 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
453 rather than the verbs used.
455 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
456 from 255 to 1024 chars.
458 JH/24 Verification callouts now attempt to use TLS by default.
460 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
461 are generic router options now. The defaults didn't change.
463 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
464 Original patch from Alexander Shikoff, worked over by JH.
466 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
467 files if ZCAT_COMMAND is not executable.
469 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
471 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
473 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
474 Normally benign, it bites when the pair was led to by a CNAME;
475 modern usage is to not canonicalize the domain to a CNAME target
476 (and we were inconsistent anyway for A-only vs AAAA+A).
478 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
480 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
481 when evaluating $sender_host_dnssec.
483 JH/31 Check the HELO verification lookup for DNSSEC, adding new
484 $sender_helo_dnssec variable.
486 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
488 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
490 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
492 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
493 documented as working, but never had. Support all but $spam_report.
495 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
496 added for tls authenticator.
498 HS/03 Add perl_taintmode main config option
504 TL/01 When running the test suite, the README says that variables such as
505 no_msglog_check are global and can be placed anywhere in a specific
506 test's script, however it was observed that placement needed to be near
507 the beginning for it to behave that way. Changed the runtest perl
508 script to read through the entire script once to detect and set these
509 variables, reset to the beginning of the script, and then run through
510 the script parsing/test process like normal.
512 TL/02 The BSD's have an arc4random API. One of the functions to induce
513 adding randomness was arc4random_stir(), but it has been removed in
514 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
515 function when detected.
517 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
518 cause callback expansion.
520 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
521 syntax errors in an expansion can be treated as a string instead of
522 logging or causing an error, due to the internal use of bool_lax
523 instead of bool when processing it.
525 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
526 server certificates when making smtp deliveries.
528 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
530 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
532 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
534 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
535 Merged patch from Sebastian Wiedenroth.
537 JH/05 Fix results-pipe from transport process. Several recipients, combined
538 with certificate use, exposed issues where response data items split
539 over buffer boundaries were not parsed properly. This eventually
540 resulted in duplicates being sent. This issue only became common enough
541 to notice due to the introduction of connection certificate information,
542 the item size being so much larger. Found and fixed by Wolfgang Breyha.
544 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
545 size buffer was used, resulting in syntax errors when an expansion
548 JH/07 Add support for directories of certificates when compiled with a GnuTLS
549 version 3.3.6 or later.
551 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
552 is EXPERIMENTAL_EVENT, the main-configuration and transport options
553 both become "event_action", the variables become $event_name, $event_data
554 and $event_defer_errno. There is a new variable $verify_mode, usable in
555 routers, transports and related events. The tls:cert event is now also
556 raised for inbound connections, if the main configuration event_action
559 TL/06 In test suite, disable OCSP for old versions of openssl which contained
560 early OCSP support, but no stapling (appears to be less than 1.0.0).
562 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
563 server certificate names available under the smtp transport option
564 "tls_verify_cert_hostname" now do not permit multi-component wildcard
567 JH/10 Time-related extraction expansions from certificates now use the main
568 option "timezone" setting for output formatting, and are consistent
569 between OpenSSL and GnuTLS compilations. Bug 1541.
571 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
572 encoded parameter in the incoming message. Bug 1558.
574 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
575 include certificate info, eximon was claiming there were spoolfile
578 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
580 JH/14 Log delivery-related information more consistently, using the sequence
581 "H=<name> [<ip>]" wherever possible.
583 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
584 are problematic for Debian distribution, omit them from the release
587 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
589 JH/16 Fix string representation of time values on 64bit time_t architectures.
592 JH/17 Fix a null-indirection in certextract expansions when a nondefault
593 output list separator was used.
598 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
599 checkers that were complaining about end of non-void function with no
602 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
603 This was a regression introduced in 4.83 by another bugfix.
605 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
607 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
608 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
614 TF/01 Correctly close the server side of TLS when forking for delivery.
616 When a message was received over SMTP with TLS, Exim failed to clear up
617 the incoming connection properly after forking off the child process to
618 deliver the message. In some situations the subsequent outgoing
619 delivery connection happened to have the same fd number as the incoming
620 connection previously had. Exim would try to use TLS and fail, logging
621 a "Bad file descriptor" error.
623 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
624 utilities have not been installed.
626 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
627 temporary space as the ACL may create new global variables.
629 TL/01 LDAP support uses per connection or global context settings, depending
630 upon the detected version of the libraries at build time.
632 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
633 to extract and use the src ip:port in logging and expansions as if it
634 were a direct connection from the outside internet. PPv2 support was
635 updated based on HAProxy spec change in May 2014.
637 JH/02 Add ${listextract {number}{list}{success}{fail}}.
639 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
640 Properly escape header and check for NULL return.
642 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
645 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
647 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
648 characters in header names, implemented as a verify condition.
649 Contributed by Michael Fischer v. Mollard.
651 TL/05 Rename SPF condition results err_perm and err_temp to standardized
652 results permerror and temperror. Previous values are deprecated but
653 still accepted. In a future release, err_perm and err_temp will be
654 completely removed, which will be a backward incompatibility if the
655 ACL tests for either of these two old results. Patch contributed by
656 user bes-internal on the mailing list.
658 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
660 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
661 selectors, in both main and reject logs.
663 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
666 JH/07 Add malware type "sock" for talking to simple daemon.
668 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
670 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
671 routers/transports under cutthrough routing.
673 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
674 numbers. Touch up "bool" conditional to keep the same definition.
676 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
678 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
680 JH/12 Expand items in router/transport headers_add or headers_remove lists
681 individually rather than the list as a whole. Bug 1452.
683 Required for reasonable handling of multiple headers_ options when
684 they may be empty; requires that headers_remove items with embedded
685 colons must have them doubled (or the list-separator changed).
687 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
688 view the policy declared in the DMARC record. Currently, $dmarc_status
689 is a combined value of both the record presence and the result of the
692 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
694 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
695 dnslookup router and the smtp transport (applying to the forward
698 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
699 of ldap servers used for a specific lookup. Patch provided by Heiko
702 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
703 New variable $lookup_dnssec_authenticated for observability.
705 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
706 Patch submitted by Lars Timman.
708 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
710 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
711 Requires trusted mode and valid format message id, aborts otherwise.
712 Patch contributed by Heiko Schlichting.
714 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
715 certextract with support for various fields. Bug 1358.
717 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
718 is requested by default, modifiable by smtp transport option
721 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
722 operate on certificate variables to give certificate fingerprints
723 Also new ${sha256:cert_variable}.
725 JH/23 The PRDR feature is moved from being Experimental into the mainline.
727 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
728 Christian Aistleitner.
730 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
732 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
733 file. Patch from Wolfgang Breyha.
735 JH/25 Expand the coverage of the delivery $host and $host_address to
736 client authenticators run in verify callout. Bug 1476.
738 JH/26 Port service names are now accepted for tls_on_connect_ports, to
739 align with daemon_smtp_ports. Bug 72.
741 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
742 support and error reporting did not work properly.
744 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
745 and is readable. Patch from Andrew Colin Kissa.
747 TL/14 Enhance documentation of ${run expansion and how it parses the
748 commandline after expansion, particularly in the case when an
749 unquoted variable expansion results in an empty value.
751 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
753 PP/02 Fix internal collision of T_APL on systems which support RFC3123
754 by renaming away from it. Addresses GH issue 15, reported by
757 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
759 TL/15 SECURITY: prevent double expansion in math comparison functions
760 (can expand unsanitized data). Not remotely exploitable.
767 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
769 PP/02 Make -n do something, by making it not do something.
770 When combined with -bP, the name of an option is not output.
772 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
775 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
776 $sender_host_name and config options to manage this, and basic check
779 PP/05 DSCP support for outbound connections and control modifier for inbound.
781 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
782 (Only plugin which currently uses this is kerberos4, which nobody should
783 be using, but we should make it available and other future plugins might
784 conceivably use it, even though it would break NAT; stuff *should* be
785 using channel bindings instead).
787 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
788 name; added for Sendmail compatibility; requires admin caller.
789 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
790 just ignore it); requires trusted caller.
791 Also parse but ignore: -Ac -Am -X<logfile>
794 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
796 TL/02 Add +smtp_confirmation as a default logging option.
798 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
799 Patch by Magnus Holmgren from 2007-02-20.
801 TL/04 Bugzilla 1281 - Spec typo.
802 Bugzilla 1283 - Spec typo.
803 Bugzilla 1290 - Spec grammar fixes.
805 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
807 TL/06 Add Experimental DMARC support using libopendmarc libraries.
809 TL/07 Fix an out of order global option causing a segfault. Reported to dev
810 mailing list by by Dmitry Isaikin.
812 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
814 JH/02 Support "G" suffix to numbers in ${if comparisons.
816 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
818 NM/01 Bugzilla 1197 - Spec typo
819 Bugzilla 1196 - Spec examples corrections
821 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
823 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
824 gnutls_enable_pkcs11, but renamed to more accurately indicate its
827 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
828 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
830 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
831 "acl {{name}{arg}...}", and optional args on acl condition
834 JH/05 Permit multiple router/transport headers_add/remove lines.
836 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
838 JH/07 Avoid using a waiting database for a single-message-only transport.
839 Performance patch from Paul Fisher. Bugzilla 1262.
841 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
844 JH/09 Add $headers_added variable, with content from use of ACL modifier
845 add_header (but not yet added to the message). Bugzilla 199.
847 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
848 Pulled from Bugzilla 817 by Wolfgang Breyha.
850 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
852 (nb: this is the same fix as in Exim 4.80.1)
854 JH/11 Add A= logging on delivery lines, and a client_set_id option on
857 JH/12 Add optional authenticated_sender logging to A= and a log_selector
860 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
862 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
863 advertise SMTP AUTH mechanism to us, instead of a generic
864 protocol violation error. Also, make Exim more robust to bad
865 data from the Dovecot auth socket.
867 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
869 When a queue runner is handling a message, Exim first routes the
870 recipient addresses, during which it prunes them based on the retry
871 hints database. After that it attempts to deliver the message to
872 any remaining recipients. It then updates the hints database using
875 So if a recipient address works intermittently, it can get repeatedly
876 deferred at routing time. The retry hints record remains fresh so the
877 address never reaches the final cutoff time.
879 This is a fairly common occurrence when a user is bumping up against
880 their storage quota. Exim had some logic in its local delivery code
881 to deal with this. However it did not apply to per-recipient defers
882 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
884 This change adds a proper retry rule check during routing so that the
885 final cutoff time is checked against the message's age. We only do
886 this check if there is an address retry record and there is not a
887 domain retry record; this implies that previous attempts to handle
888 the address had the retry_use_local_parts option turned on. We use
889 this as an approximation for the destination being like a local
890 delivery, as in LMTP.
892 I suspect this new check makes the old local delivery cutoff check
893 redundant, but I have not verified this so I left the code in place.
895 TF/02 Correct gecos expansion when From: is a prefix of the username.
897 Test 0254 submits a message to Exim with the header
901 When I ran the test suite under the user fanf2, Exim expanded
902 the header to contain my full name, whereas it should have added
903 a Resent-Sender: header. It erroneously treats any prefix of the
904 username as equal to the username.
906 This change corrects that bug.
908 GF/01 DCC debug and logging tidyup
909 Error conditions log to paniclog rather than rejectlog.
910 Debug lines prefixed by "DCC: " to remove any ambiguity.
912 TF/03 Avoid unnecessary rebuilds of lookup-related code.
914 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
915 Bug spotted by Jeremy Harris; was flawed since initial commit.
916 Would have resulted in OCSP responses post-SNI triggering an Exim
917 NULL dereference and crash.
919 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
921 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
922 Bug detection, analysis and fix by Samuel Thibault.
923 Bugzilla 1331, Debian bug #698092.
925 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
927 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
928 Server implementation by Todd Lyons, client by JH.
929 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
930 config variable "prdr_enable" controls whether the server
931 advertises the facility. If the client requests PRDR a new
932 acl_data_smtp_prdr ACL is called once for each recipient, after
933 the body content is received and before the acl_smtp_data ACL.
934 The client is controlled by both of: a hosts_try_prdr option
935 on the smtp transport, and the server advertisement.
936 Default client logging of deliveries and rejections involving
937 PRDR are flagged with the string "PRDR".
939 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
940 fclose(). Diagnosis by Todd Lyons.
942 PP/17 Update configure.default to handle IPv6 localhost better.
943 Patch by Alain Williams (plus minor tweaks).
946 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
947 This is now consistent with GnuTLS, and is now documented: the
948 previous undocumented portable approach to treating the option as
949 unset was to force an expansion failure. That still works, and
950 an empty string is now equivalent.
952 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
953 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
954 not performing validation itself.
956 PP/20 Added force_command boolean option to pipe transport.
957 Patch from Nick Koston, of cPanel Inc.
959 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
962 TF/04 Added udpsend ACL modifier and hexquote expansion operator
964 PP/21 Fix eximon continuous updating with timestamped log-files.
965 Broken in a format-string cleanup in 4.80, missed when I repaired the
966 other false fix of the same issue.
967 Report and fix from Heiko Schlichting.
970 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
971 Report from Prashanth Katuri.
973 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
974 It's SecureTransport, so affects any MacOS clients which use the
975 system-integrated TLS libraries, including email clients.
977 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
978 using a MIME ACL for non-SMTP local injection.
979 Report and assistance in diagnosis by Warren Baker.
981 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
983 JH/16 Fix comparisons for 64b. Bugzilla 1385.
985 TL/09 Add expansion variable $authenticated_fail_id to keep track of
986 last id that failed so it may be referenced in subsequent ACL's.
988 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
991 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
992 ldap library initialization, allowing self-signed CA's to be
993 used. Also properly sets require_cert option later in code by
994 using NULL (global ldap config) instead of ldap handle (per
995 session). Bug diagnosis and testing by alxgomz.
997 TL/12 Enhanced documentation in the ratelimit.pl script provided in
998 the src/util/ subdirectory.
1000 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1001 renamed to Transport Post Delivery Action by Jeremy Harris, as
1004 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1005 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1006 redis_servers = needs to be configured which will be used by the redis
1007 lookup. Patch from Warren Baker, of The Packet Hub.
1009 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1011 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1012 hostname or reverse DNS when processing a host list. Used suggestions
1013 from multiple comments on this bug.
1015 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1017 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1018 Missed a few lines, added it to make the runtest require no keyboard
1021 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1022 contains upper case chars. Make router use caseful_local_part.
1024 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1025 support when GnuTLS has been built with p11-kit.
1031 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1033 This, or similar/improved, will also be change PP/11 of 4.82.
1039 PP/01 Handle short writes when writing local log-files.
1040 In practice, only affects FreeBSD (8 onwards).
1041 Bugzilla 1053, with thanks to Dmitry Isaikin.
1043 NM/01 Bugzilla 949 - Documentation tweak
1045 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1048 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1050 PP/02 Implemented gsasl authenticator.
1052 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1054 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1055 `pkg-config foo` for cflags/libs.
1057 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1058 with rest of GSASL and with heimdal_gssapi.
1060 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1061 `pkg-config foo` for cflags/libs for the TLS implementation.
1063 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1064 properties get this fed in as external SSF. A number of robustness
1065 and debugging improvements to the cyrus_sasl authenticator.
1067 PP/08 cyrus_sasl server now expands the server_realm option.
1069 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1070 Patch by Jeremy Harris.
1072 PP/10 Added dbmjz lookup type.
1074 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1076 PP/12 MAIL args handles TAB as well as SP, for better interop with
1077 non-compliant senders.
1078 Analysis and variant patch by Todd Lyons.
1080 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1081 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1082 Patch from Dirk Mueller <dmueller@suse.com>
1084 PP/13 tls_peerdn now print-escaped for spool files.
1085 Observed some $tls_peerdn in wild which contained \n, which resulted
1086 in spool file corruption.
1088 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1089 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1090 or write after TLS renegotiation, which otherwise led to messages
1093 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1094 as a tracking header (ie: a signed header comes before the signature).
1095 Patch from Wolfgang Breyha.
1097 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1098 comma-sep list; embedded commas doubled.
1100 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1102 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1104 Report and patch from Dmitry Banschikov.
1106 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1107 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1108 failures. We appear to now support TLS1.1+ with Exim.
1110 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1111 lets Exim select keys and certificates based upon TLS SNI from client.
1112 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1113 before an outbound SMTP session. New log_selector, +tls_sni.
1115 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1116 NULL dereference. Report and patch from Alun Jones.
1118 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1119 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1120 Not seeing resolver debug output on NetBSD, but suspect this is a
1121 resolver implementation change.
1123 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1124 Left warnings. Added "eximon gdb" invocation mode.
1126 PP/21 Defaulting "accept_8bitmime" to true, not false.
1128 PP/22 Added -bw for inetd wait mode support.
1130 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1131 locate the relevant includes and libraries. Made this the default.
1133 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1134 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1136 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1137 This may cause build issues on older platforms.
1139 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1140 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1141 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1142 Added SNI support via GnuTLS too.
1143 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1145 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1147 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1148 Applied second patch from Janne, implementing suggestion to default
1149 multiple-strings-in-record handling to match SPF spec.
1151 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1153 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1154 read-only, out of scope).
1155 Patch from Wolfgang Breyha, report from Stuart Northfield.
1157 PP/29 Fix three issues highlighted by clang analyser static analysis.
1158 Only crash-plausible issue would require the Cambridge-specific
1159 iplookup router and a misconfiguration.
1160 Report from Marcin Mirosław.
1162 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1164 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1165 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1166 As part of this, removing so much warning spew let me fix some minor
1167 real issues in debug logging.
1169 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1170 assignment on my part. Fixed.
1172 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1173 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1174 Janne Snabb (who went above and beyond: thank you).
1176 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1177 string otherwise requires a connection and a bunch more work and it's
1178 relatively easy to get wrong. Should also expose TLS library linkage
1181 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1182 64-bit ${eval} (JH/03).
1184 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1185 GNU libc to support some of the 64-bit stuff, should not lead to
1186 conflicts. Defined before os.h is pulled in, so if a given platform
1187 needs to override this, it can.
1189 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1190 protection layer was required, which is not implemented.
1191 Bugzilla 1254, patch from Wolfgang Breyha.
1193 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1194 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1195 tls_dhparam take prime identifiers. Also unbreak combination of
1196 OpenSSL+DH_params+TLSSNI.
1198 PP/39 Disable SSLv2 by default in OpenSSL support.
1204 PP/01 Solaris build fix for Oracle's LDAP libraries.
1205 Bugzilla 1109, patch from Stephen Usher.
1207 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1209 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1212 TF/02 Fix a couple more cases where we did not log the error message
1213 when unlink() failed. See also change 4.74-TF/03.
1215 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1216 lock up or crash if it happened to be inside a call to libc when it
1217 got a SIGUSR1 from exiwhat.
1219 The SIGUSR1 handler appends the current process status to the process
1220 log which is later printed by exiwhat. It used to use the general
1221 purpose logging code to do this, but several functions it calls are
1222 not safe for signals.
1224 The new output code in the SIGUSR1 handler is specific to the process
1225 log, and simple enough that it's easy to inspect for signal safety.
1226 Removing some special cases also simplifies the general logging code.
1227 Removing the spurious timestamps from the process log simplifies
1230 TF/04 Improved ratelimit ACL condition.
1232 The /noupdate option has been deprecated in favour of /readonly which
1233 has clearer semantics. The /leaky, /strict, and /readonly update modes
1234 are mutually exclusive. The update mode is no longer included in the
1235 database key; it just determines when the database is updated. (This
1236 means that when you upgrade Exim will forget old rate measurements.)
1238 Exim now checks that the per_* options are used with an update mode that
1239 makes sense for the current ACL. For example, when Exim is processing a
1240 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1241 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1242 must specify per_mail/readonly. If you omit the update mode it defaults to
1243 /leaky where that makes sense (as before) or /readonly where required.
1245 The /noupdate option is now undocumented but still supported for
1246 backwards compatibility. It is equivalent to /readonly except that in
1247 ACLs where /readonly is required you may specify /leaky/noupdate or
1248 /strict/noupdate which are treated the same as /readonly.
1250 A useful new feature is the /count= option. This is a generalization
1251 of the per_byte option, so that you can measure the throughput of other
1252 aggregate values. For example, the per_byte option is now equivalent
1253 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1255 The per_rcpt option has been generalized using the /count= mechanism
1256 (though it's more complicated than the per_byte equivalence). When it is
1257 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1258 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1259 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1260 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1261 Note that using per_rcpt with a non-readonly update mode in more than
1262 one ACL will cause the recipients to be double-counted. (The per_mail
1263 and per_byte options don't have this problem.)
1265 The handling of very low rates has changed slightly. If the computed rate
1266 is less than the event's count (usually one) then this event is the first
1267 after a long gap. In this case the rate is set to the same as this event's
1268 count, so that the first message of a spam run is counted properly.
1270 The major new feature is a mechanism for counting the rate of unique
1271 events. The new per_addr option counts the number of different
1272 recipients that someone has sent messages to in the last time period. It
1273 behaves like per_rcpt if all the recipient addresses are different, but
1274 duplicate recipient addresses do not increase the measured rate. Like
1275 the /count= option this is a general mechanism, so the per_addr option
1276 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1277 example, measure the rate that a client uses different sender addresses
1278 with the options per_mail/unique=$sender_address. There are further
1279 details in the main documentation.
1281 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1283 TF/06 Removed a few PCRE remnants.
1285 TF/07 Automatically extract Exim's version number from tags in the git
1286 repository when doing development or release builds.
1288 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1289 Bugzilla 879. Patch from Paul Fisher.
1291 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1292 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1295 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1297 PP/05 Variable $av_failed, true if the AV scanner deferred.
1298 Bugzilla 1078. Patch from John Horne.
1300 PP/06 Stop make process more reliably on build failure.
1301 Bugzilla 1087. Patch from Heiko Schlittermann.
1303 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1304 Bugzilla 1089. Patch from Heiko Schlittermann.
1306 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1307 Bugzilla 1131. Patch from Holger Weiß.
1309 PP/09 Handle IPv6 addresses with SPF.
1310 Bugzilla 860. Patch from Wolfgang Breyha.
1312 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1314 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1317 PP/11 match_* no longer expand right-hand-side by default.
1318 New compile-time build option, EXPAND_LISTMATCH_RHS.
1319 New expansion conditions, "inlist", "inlisti".
1321 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1323 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1325 PP/14 fix log_write() format string regression from TF/03.
1326 Bugzilla 1152. Patch from Dmitry Isaikin.
1332 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1334 PP/02 Harmonised TLS library version reporting; only show if debugging.
1335 Layout now matches that introduced for other libraries in 4.74 PP/03.
1337 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1339 PP/04 New "dns_use_edns0" global option.
1341 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1344 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1345 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1347 TK/01 Updated PolarSSL code to 0.14.2.
1348 Bugzilla 1097. Patch from Andreas Metzler.
1350 PP/07 Catch divide-by-zero in ${eval:...}.
1351 Fixes bugzilla 1102.
1353 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1356 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1357 format-string attack -- SECURITY: remote arbitrary code execution.
1359 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1360 time unintentionally subject to list matching rules, letting the header
1361 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1362 arbitrary string expansion). This allowed for information disclosure.
1364 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1365 INT_MIN/-1 -- value coerced to INT_MAX.
1371 NM/01 Workaround for PCRE version dependency in version reporting
1374 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1375 This fixes portability to compilers other than gcc, notably
1376 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1378 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1379 makefiles for portability to HP-UX and POSIX correctness.
1381 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1382 Also via indented variable definition in the Makefile.
1383 (Debugging by Oliver Heesakkers).
1385 PP/02 Restore caching of spamd results with expanded spamd_address.
1386 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1388 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1389 Improves build reliability. Fix from: Frank Elsner
1391 NM/02 Fix wide character breakage in the rfc2047 coding
1392 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1394 NM/03 Allow underscore in dnslist lookups
1395 Fixes bug 1026. Patch from Graeme Fowler
1397 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1398 Code patches from Adam Ciarcinski of NetBSD.
1400 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1403 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1404 is logged, to avoid truncation. Patch from John Horne.
1406 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1407 Patch from Jakob Hirsch.
1409 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1410 SQL string expansion failure details.
1411 Patch from Andrey Oktyabrski.
1413 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1414 Patch from Simon Arlott.
1416 PP/09 New lookups functionality failed to compile on old gcc which rejects
1417 extern declarations in function scope.
1418 Patch from Oliver Fleischmann
1420 PP/10 Use sig_atomic_t for flags set from signal handlers.
1421 Check getgroups() return and improve debugging.
1422 Fixed developed for diagnosis in bug 927 (which turned out to be
1425 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1426 Patch from Mark Zealey.
1428 PP/12 Bugzilla 1056: Improved spamd server selection.
1429 Patch from Mark Zealey.
1431 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1432 Based on patch from Heiko Schlittermann.
1434 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1435 Patch from Uwe Doering, sign-off by Michael Haardt.
1437 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1438 variable declaration deep within a block. Bug and patch from
1441 PP/15 lookups-Makefile IRIX compatibility coercion.
1443 PP/16 Make DISABLE_DKIM build knob functional.
1445 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1446 Patch by Simon Arlott
1448 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1449 variable argument macros. Our copy now differs from upstream.
1455 TF/01 Failure to get a lock on a hints database can have serious
1456 consequences so log it to the panic log.
1458 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1459 controlled using the smtp_confirmation log selector.
1461 TF/03 Include the error message when we fail to unlink a spool file.
1463 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1464 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1465 for maintaining out-of-tree patches for some time.
1467 PP/01 Bugzilla 139: Documentation and portability issues.
1468 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1469 Handle per-OS dynamic-module compilation flags.
1471 PP/02 Let /dev/null have normal permissions.
1472 The 4.73 fixes were a little too stringent and complained about the
1473 permissions on /dev/null. Exempt it from some checks.
1474 Reported by Andreas M. Kirchwitz.
1476 PP/03 Report version information for many libraries, including
1477 Exim version information for dynamically loaded libraries. Created
1478 version.h, now support a version extension string for distributors
1479 who patch heavily. Dynamic module ABI change.
1481 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1482 privilege escalation vulnerability whereby the Exim run-time user
1483 can cause root to append content of the attacker's choosing to
1486 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1489 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1490 If dropping privileges for untrusted macros, we disabled normal logging
1491 on the basis that it would fail; for the Exim run-time user, this is not
1492 the case, and it resulted in successful deliveries going unlogged.
1493 Fixed. Reported by Andreas Metzler.
1499 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1500 only prepend for the Resent-* case. Fixes regression introduced in
1501 Exim 4.70 by NM/22 for Bugzilla 607.
1503 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1504 increasing numbers of administrators be bitten by this.
1506 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1508 PP/03 Bugzilla 994: added openssl_options main configuration option.
1510 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1512 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1514 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1516 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1517 without a peer certificate, leading to a segfault because of an
1518 assumption that peers always have certificates. Be a little more
1519 paranoid. Problem reported by Martin Tscholak.
1521 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1522 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1523 NB: ClamAV planning to remove STREAM in "middle of 2010".
1524 CL also introduces -bmalware, various -d+acl logging additions and
1525 more caution in buffer sizes.
1527 PP/09 Implemented reverse_ip expansion operator.
1529 PP/10 Bugzilla 937: provide a "debug" ACL control.
1531 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1533 PP/12 Bugzilla 973: Implement --version.
1535 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1537 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1539 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1541 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1542 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1543 ignore trailing whitespace.
1545 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1547 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1550 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1551 Notification from Dr Andrew Aitchison.
1553 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1554 ExtendedDetectionInfo response format.
1555 Notification from John Horne.
1557 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1560 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1561 XSL and documented dependency on system catalogs, with examples of how
1564 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1567 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1568 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1569 configuration file which is writeable by the Exim user or group.
1571 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1572 of configuration files to cover files specified with the -C option if
1573 they are going to be used with root privileges, not just the default
1576 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1577 option (effectively making it always true).
1579 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1580 files to be used while preserving root privileges.
1582 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1583 that rogue child processes cannot use them.
1585 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1586 run-time user, instead of root.
1588 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1589 Exim run-time user without dropping privileges.
1591 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1592 result string, instead of calling string_vformat() twice with the same
1595 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1596 for other users. Others should always drop root privileges if they use
1597 -C on the command line, even for a whitelisted configure file.
1599 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1601 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1607 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1608 $data_path, and $header_path variables; fixed documentation bugs and
1611 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1612 exipick to access non-standard spools, including the "frozen" queue
1615 NM/01 Bugzilla 965: Support mysql stored procedures.
1616 Patch from Alain Williams
1618 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1620 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1621 Patch from Andreas Metzler
1623 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1624 Patch from Kirill Miazine
1626 NM/05 Bugzilla 671: Added umask to procmail example.
1628 JJ/03 installed exipick 20100323.0, fixing doc bug
1630 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1631 directory. Notification and patch from Dan Rosenberg.
1633 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1635 TK/02 Improve log output when DKIM signing operation fails.
1637 MH/01 Treat the transport option dkim_domain as a colon separated
1638 list, not as a single string, and sign the message with each element,
1639 omitting multiple occurences of the same signer.
1641 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1642 Bugzilla 985, 986. Patch by Simon Arlott
1644 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1645 Patch by Simon Arlott
1647 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1648 MBX locking. Notification from Dan Rosenberg.
1654 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1656 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1658 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1660 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1662 NM/04 Bugzilla 915: Flag broken perl installation during build.
1668 TK/01 Added patch by Johannes Berg that expands the main option
1669 "spamd_address" if it starts with a dollar sign.
1671 TK/02 Write list of recipients to X-Envelope-Sender header when building
1672 the mbox-format spool file for content scanning (suggested by Jakob
1675 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1676 (http://www.dcc-servers.net/) support via dccifd. Activated by
1677 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1679 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1680 by Mark Daniel Reidel <mr@df.eu>.
1682 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1683 When building exim an external PCRE library is now needed -
1684 PCRE is a system library on the majority of modern systems.
1685 See entry on PCRE_LIBS in EDITME file.
1687 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1688 conversation. Added nologin parameter to request.
1689 Patch contributed by Kirill Miazine.
1691 TF/01 Do not log submission mode rewrites if they do not change the address.
1693 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1695 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1696 log files in place. Contributed by Roberto Lima.
1698 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1700 TF/03 Bugzilla 615: When checking the local_parts router precondition
1701 after a local_part_suffix or local_part_prefix option, Exim now
1702 does not use the address's named list lookup cache, since this
1703 contains cached lookups for the whole local part.
1705 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1706 Robert Millan. Documentation is in experimental-spec.txt.
1708 TF/04 Bugzilla 668: Fix parallel build (make -j).
1710 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1712 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1713 Patch provided by Jan Srzednicki.
1715 TF/05 Leading white space used to be stripped from $spam_report which
1716 wrecked the formatting. Now it is preserved.
1718 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1719 that they are available at delivery time.
1721 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1723 TF/08 TLS error reporting now respects the incoming_interface and
1724 incoming_port log selectors.
1726 TF/09 Produce a more useful error message if an SMTP transport's hosts
1727 setting expands to an empty string.
1729 NM/06 Bugzilla 744: EXPN did not work under TLS.
1730 Patch provided by Phil Pennock.
1732 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1733 Patch provided by Richard Godbee.
1735 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1736 acl_smtp_notquit, added index entry.
1738 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1739 Patch provided by Eugene Bujak.
1741 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1742 accept(). Patch provided by Maxim Dounin.
1744 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1745 Patch provided by Phil Pennock.
1747 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1749 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1750 Patch provided by Brad "anomie" Jorsch.
1752 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1753 Patch provided by Dean Brooks.
1755 TK/05 Add native DKIM support (does not depend on external libraries).
1757 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1758 Patch provided by Graeme Fowler.
1760 NM/16 Bugzilla 851: Documentation example syntax fix.
1762 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1764 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1767 NM/19 Bugzilla 745: TLS version reporting.
1768 Patch provided by Phil Pennock.
1770 NM/20 Bugzilla 167: bool: condition support.
1771 Patch provided by Phil Pennock.
1773 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1774 clients. Patch provided by Phil Pennock.
1776 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1777 Patch provided by Brad "anomie" Jorsch.
1779 NM/23 Bugzilla 687: Fix misparses in eximstats.
1780 Patch provided by Heiko Schlittermann.
1782 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1783 Patch provided by Heiko Schlittermann.
1785 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1786 plus update to original patch.
1788 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1790 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1791 Patch provided by David Brownlee.
1793 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1795 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1797 NM/30 Bugzilla 888: TLS documentation bugfixes.
1799 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1801 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1802 Unlike the original bugzilla I have changed all shell scripts in src tree.
1804 NM/33 Bugzilla 898: Transport filter timeout fix.
1805 Patch by Todd Rinaldo.
1807 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1808 Patch by Serge Demonchaux.
1810 NM/35 Bugzilla 39: Base64 decode bug fixes.
1811 Patch by Jakob Hirsch.
1813 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1815 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1817 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1819 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1825 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1826 ALT-N's libdkim that I have put here:
1827 http://duncanthrax.net/exim-experimental/
1829 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1830 were called 'true' and it seems that C99 defines that as a reserved
1831 keyword to be used with 'bool' variable types. That means you could
1832 not include C99-style headers which use bools without triggering
1833 build errors in sieve.c.
1835 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1836 as mailq or other aliases. Changed the --help handling significantly
1837 to do whats expected. exim_usage() emits usage/help information.
1839 SC/01 Added the -bylocaldomain option to eximstats.
1841 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1843 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1845 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1851 PH/01 Another patch from the Sieve maintainer.
1853 PH/02 When an IPv6 address is converted to a string for single-key lookup
1854 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1855 dots are used instead of colons so that keys in lsearch files need not
1856 contain colons. This was done some time before quoting was made available
1857 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1858 (notated using the quote facility) so as to distinguish them from IPv4
1859 keys. This meant that lookups for IP addresses in host lists did not work
1860 for iplsearch lookups.
1862 This has been fixed by arranging for IPv6 addresses to be expressed with
1863 colons if the lookup type is iplsearch. This is not incompatible, because
1864 previously such lookups could never work.
1866 The situation is now rather anomalous, since one *can* have colons in
1867 ordinary lsearch keys. However, making the change in all cases is
1868 incompatible and would probably break a number of configurations.
1870 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1873 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1874 conversion specification without a maximum field width, thereby enabling
1875 a rogue spamd server to cause a buffer overflow. While nobody in their
1876 right mind would setup Exim to query an untrusted spamd server, an
1877 attacker that gains access to a server running spamd could potentially
1878 exploit this vulnerability to run arbitrary code as the Exim user.
1880 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1881 $primary_hostname instead of what libspf2 thinks the hosts name is.
1883 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1884 a directory entry by the name of the lookup key. Previously, if a
1885 symlink pointed to a non-existing file or a file in a directory that
1886 Exim lacked permissions to read, a lookup for a key matching that
1887 symlink would fail. Now it is enough that a matching directory entry
1888 exists, symlink or not. (Bugzilla 503.)
1890 PH/03 The body_linecount and body_zerocount variables are now exported in the
1893 PH/04 Added the $dnslist_matched variable.
1895 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1896 This means they are set thereafter only if the connection becomes
1899 PH/06 Added the client_condition to authenticators so that some can be skipped
1900 by clients under certain conditions.
1902 PH/07 The error message for a badly-placed control=no_multiline_responses left
1903 "_responses" off the end of the name.
1905 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1907 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1908 (without spaces) instead of just copying the configuration text.
1910 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1912 PH/11 Added $max_received_linelength.
1914 PH/12 Added +ignore_defer and +include_defer to host lists.
1916 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1917 way in which PCRE > 7.0 is built.
1919 PH/14 Implemented queue_only_load_latch.
1921 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1922 MAIL command. The effect was to mangle the value on 64-bit systems.
1924 PH/16 Another patch from the Sieve maintainer.
1926 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1928 PH/18 If a system quota error occurred while trying to create the file for
1929 a maildir delivery, the message "Mailbox is full" was not appended to the
1930 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1931 only to a quota excession during the actual writing of the file.
1933 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1934 characters?) which causes problems in log lines. The DN values are now
1935 passed through string_printing() before being added to log lines.
1937 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1938 and InterBase are left for another time.)
1940 PH/21 Added message_body_newlines option.
1942 PH/22 Guard against possible overflow in moan_check_errorcopy().
1944 PH/23 POSIX allows open() to be a macro; guard against that.
1946 PH/24 If the recipient of an error message contained an @ in the local part
1947 (suitably quoted, of course), incorrect values were put in $domain and
1948 $local_part during the evaluation of errors_copy.
1954 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1955 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1958 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1959 issue a MAIL command.
1961 PH/02 In an ACL statement such as
1963 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1965 if a client was not listed at all, or was listed with a value other than
1966 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1967 the condition was not true (as it should be), so access was not denied.
1968 The bug was that the ! inversion was incorrectly passed on to the second
1969 item. This has been fixed.
1971 PH/03 Added additional dnslists conditions == and =& which are different from
1972 = and & when the dns lookup returns more than one IP address.
1974 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1975 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1977 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1978 FSYNC, which compiles an option called disable_fsync that allows for
1979 bypassing fsync(). The documentation is heavily laced with warnings.
1981 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1983 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1984 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1985 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1986 including adding "make clean"; (3) Added -fPIC when compiling the test
1987 dynamically loaded module, to get rid of a warning.
1989 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1990 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1991 = 0s. The bug is otherwise harmless.
1993 PH/07 There was a bug in the dovecot authenticator such that the value of
1994 $auth1 could be overwritten, and so not correctly preserved, after a
1995 successful authentication. This usually meant that the value preserved by
1996 the server_setid option was incorrect.
1998 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2000 PH/09 Installed PCRE release 7.0.
2002 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2003 run for batched SMTP input. It is now run at the start of every message
2004 in the batch. While fixing this I discovered that the process information
2005 (output by running exiwhat) was not always getting set for -bs and -bS
2006 input. This is fixed, and it now also says "batched" for BSMTP.
2008 PH/11 Added control=no_pipelining.
2010 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2011 patch, slightly modified), and move the expansion of helo_data till after
2012 the connection is made in the smtp transport (so it can use these
2015 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2017 PH/14 Added log_selector = +pid.
2019 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2021 PH/16 Add ${if forany and ${if forall.
2023 PH/17 Added dsn_from option to vary the From: line in DSNs.
2025 PH/18 Flush SMTP output before performing a callout, unless control =
2026 no_callout_flush is set.
2028 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2029 was true (the default) a successful delivery failed to delete the retry
2030 item, thus causing premature timeout of the address. The bug is now
2033 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2035 PH/21 Long custom messages for fakedefer and fakereject are now split up
2036 into multiline responses in the same way that messages for "deny" and
2037 other ACL rejections are.
2039 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2040 with slight modification.
2042 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2043 draft, changing the syntax and factoring some duplicate code".
2045 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2046 for deliveries of the second and subsequent messages over the same SMTP
2049 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2050 ${reduce, with only minor "tidies".
2052 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2054 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2055 expansion side effects.
2057 PH/27 When a message times out after an over-quota error from an Exim-imposed
2058 quota, the bounce message says "mailbox is full". This message was not
2059 being given when it was a system quota that was exceeded. It now should
2062 MH/03 Made $recipients available in local_scan(). local_scan() already has
2063 better access to the recipient list through recipients_list[], but
2064 $recipients can be useful in postmaster-provided expansion strings.
2066 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2067 in the case of a MAIL command with additional options following the
2068 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2069 were accidentally chopped off.
2071 PH/29 SMTP synchronization checks are implemented when a command is read -
2072 there is a check that no more input is waiting when there shouldn't be
2073 any. However, for some commands, a delay in an ACL can mean that it is
2074 some time before the response is written. In this time, more input might
2075 arrive, invalidly. So now there are extra checks after an ACL has run for
2076 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2077 pipelining has not been advertised.
2079 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2081 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2082 returned in the SMTP response when smtp_return_error_details was false.
2083 This has been fixed.
2085 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2086 instead of the C I/O that was originally supplied, because problems were
2087 reported on Solaris.
2089 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2090 Exim which did not show up earlier: it was assuming that a call to
2091 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2092 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2093 was a macro that became an assignment, so it seemed to work. This has
2094 changed to a proper function call with a void return, hence the compile
2095 error. Exim's code has been fixed.
2097 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2100 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2102 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2104 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2105 because it turns out to be too big or there is a timeout) there is no
2106 "Completed" line in the log. When some messages of this type were
2107 selected by exigrep, they were listed as "not completed". Others were
2108 picked up by some special patterns. I have improved the selection
2109 criteria to be more general.
2111 PH/38 The host_find_failed option in the manualroute router can now be set
2112 to "ignore", to completely ignore a host whose IP address cannot be
2113 found. If all hosts are ignored, the behaviour is controlled by the new
2114 host_all_ignored option.
2116 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2117 homing or because of multiple MX records with /mx) generated more than
2118 one IP address, and the following item turned out to be the local host,
2119 all the secondary addresses of the first item were incorrectly removed
2120 from the list, along with the local host and any following hosts (which
2121 is what is supposed to happen).
2123 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2124 whoever called Exim into the -H file. In the case of the daemon it was
2125 behaving confusingly. When first started, it used values for whoever
2126 started the daemon, but after a SIGHUP it used the Exim user (because it
2127 calls itself on a restart). I have changed the code so that it now always
2130 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2131 message are rejected with the same error (e.g. no authentication or bad
2132 sender address), and a DATA command is nevertheless sent (as can happen
2133 with PIPELINING or a stupid MUA), the error message that was given to the
2134 RCPT commands is included in the rejection of the DATA command. This is
2135 intended to be helpful for MUAs that show only the final error to their
2138 PH/42 Another patch from the Sieve maintainer.
2140 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2141 Eximstats - Fixed some broken HTML links and added missing column headers
2143 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2144 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2146 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2148 PH/43 Yet another patch from the Sieve maintainer.
2150 PH/44 I found a way to check for a TCP/IP connection going away before sending
2151 the response to the final '.' that terminates a message, but only in the
2152 case where the client has not sent further data following the '.'
2153 (unfortunately, this is allowed). However, in many cases there won't be
2154 any further data because there won't be any more messages to send. A call
2155 to select() can be used: if it shows that the input is "ready", there is
2156 either input waiting, or the socket has been closed. An attempt to read
2157 the next input character can distinguish the two cases. Previously, Exim
2158 would have sent an OK response which the client would never have see.
2159 This could lead to message repetition. This fix should cure that, at
2160 least in a lot of common cases.
2162 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2163 advertised in response to EHLO.
2169 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2170 fixed by 4.65/MH/01 (is this a record?) are fixed:
2172 (i) An empty string was always treated as zero by the numeric comparison
2173 operators. This behaviour has been restored.
2175 (ii) It is documented that the numeric comparison operators always treat
2176 their arguments as decimal numbers. This was broken in that numbers
2177 starting with 0 were being interpreted as octal.
2179 While fixing these problems I realized that there was another issue that
2180 hadn't been noticed. Values of message_size_limit (both the global option
2181 and the transport option) were treated as octal if they started with 0.
2182 The documentation was vague. These values are now always treated as
2183 decimal, and I will make that clear in the documentation.
2189 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2190 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2193 MH/01 Don't check that the operands of numeric comparison operators are
2194 integers when their expansion is in "skipping" mode (fixes bug
2195 introduced by 4.64-PH/07).
2197 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2198 child addresses, Exim now panics and dies. Previously, because the count
2199 is held in a short int, deliveries were likely to be lost. As such a
2200 large number of recipients for a single message is ridiculous
2201 (performance will be very, very poor), I have chosen to impose a limit
2202 rather than extend the field.
2208 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2209 leftover -K file (the existence of which was triggered by #402).
2210 While we were at it, introduced process PID as part of the -K
2211 filename. This should rule out race conditions when creating
2214 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2215 processing considerably. Previous code took too long for large mails,
2216 triggering a timeout which in turn triggers #401.
2218 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2219 in the DK code in transports.c. sendfile() is not really portable,
2220 hence the _LINUX specificness.
2222 TF/01 In the add_headers option to the mail command in an Exim filter,
2223 there was a bug that Exim would claim a syntax error in any
2224 header after the first one which had an odd number of characters
2227 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2228 callout verification, Exim cached a "reject" for the entire domain. This
2229 is correct for most verifications, but it is not correct for a recipient
2230 verification with use_sender or use_postmaster set, because in that case
2231 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2232 case of MAIL FROM:<> rejection from other early rejections (e.g.
2233 rejection of HELO). When verifying a recipient using a non-null MAIL
2234 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2235 Whatever the result of the callout, the value of the domain cache is
2236 left unchanged (for any other kind of callout, getting as far as trying
2237 RCPT means that the domain itself is ok).
2239 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2242 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2243 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2244 session, the daemon ignores ECONNECT errors and logs others; it now
2245 ignores EPIPE as well.
2247 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2248 (quoted-printable decoding).
2250 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2251 later the small subsequent patch to fix an introduced bug.
2253 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2255 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2257 PH/08 An error is now given if message_size_limit is specified negative.
2259 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2260 to be given (somewhat) arbitrary names.
2262 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2265 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2266 miscellaneous code fixes
2268 PH/10 Added the log_reject_target ACL modifier to specify where to log
2271 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2272 hostname. This is wrong, because it relates to the incoming message (and
2273 probably the interface on which it is arriving) and not to the outgoing
2274 callout (which could be using a different interface). This has been
2275 changed to use the value of the helo_data option from the smtp transport
2276 instead - this is what is used when a message is actually being sent. If
2277 there is no remote transport (possible with a router that sets up host
2278 addresses), $smtp_active_hostname is used.
2280 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2281 tweaks were necessary in order to get it to work (see also 21 below):
2282 (a) The code assumed that strncpy() returns a negative number on buffer
2283 overflow, which isn't the case. Replaced with Exim's string_format()
2285 (b) There were several signed/unsigned issues. I just did the minimum
2286 hacking in of casts. There is scope for a larger refactoring.
2287 (c) The code used strcasecmp() which is not a standard C function.
2288 Replaced with Exim's strcmpic() function.
2289 (d) The code set only $1; it now sets $auth1 as well.
2290 (e) A simple test gave the error "authentication client didn't specify
2291 service in request". It would seem that Dovecot has changed its
2292 interface. Fortunately there's a specification; I followed it and
2293 changed what the client sends and it appears to be working now.
2295 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2298 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2299 address A is aliased to B and C, where B exists and C does not. Without
2300 -v the output is "A verified" because verification stops after a
2301 successful redirection if more than one address is generated. However,
2302 with -v the child addresses are also verified. Exim was outputting "A
2303 failed to verify" and then showing the successful verification for C,
2304 with its parentage. It now outputs "B failed to verify", showing B's
2305 parentage before showing the successful verification of C.
2307 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2308 look up a TXT record in a specific list after matching in a combined
2311 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2312 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2313 they consult the DNS. I had assumed they would set it the way they
2314 wanted; and indeed my experiments on Linux seem to show that in some
2315 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2316 To be on the safe side, however, I have now made the interface to
2317 host_find_byname() similar to host_find_bydns(), with an argument
2318 containing the DNS resolver options. The host_find_byname() function now
2319 sets these options at its start, just as host_find_bydns() does. The smtp
2320 transport options dns_qualify_single and dns_search_parents are passed to
2321 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2322 of host_find_byname() use the default settings of RES_DEFNAMES
2323 (qualify_single) but not RES_DNSRCH (search_parents).
2325 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2326 spool_read_header() do less string testing, by means of a preliminary
2327 switch on the second character of optional "-foo" lines. (This is
2328 overdue, caused by the large number of possibilities that now exist.
2329 Originally there were few.) While I was there, I also converted the
2330 str(n)cmp tests so they don't re-test the leading "-" and the first
2331 character, in the hope this might squeeze out yet more improvement.
2333 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2334 flag allowing group syntax was set by the header_syntax check but not
2335 turned off, possible causing trouble later; (2) The flag was not being
2336 set at all for the header_verify test, causing "group"-style headers to
2337 be rejected. I have now set it in this case, and also caused header_
2338 verify to ignore an empty address taken from a group. While doing this, I
2339 came across some other cases where the code for allowing group syntax
2340 while scanning a header line wasn't quite right (mostly, not resetting
2341 the flag correctly in the right place). These bugs could have caused
2342 trouble for malformed header lines. I hope it is now all correct.
2344 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2345 with the "reply" argument non-NULL. The code, however (which originally
2346 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2347 but it didn't always do it. This confused somebody who was copying the
2348 code for some other use. I have removed all the tests.
2350 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2351 feature that was used to support insecure browsers during the U.S. crypto
2352 embargo. It requires special client support, and Exim is probably the
2353 only MTA that supported it -- and would never use it because real RSA is
2354 always available. This code has been removed, because it had the bad
2355 effect of slowing Exim down by computing (never used) parameters for the
2356 RSA_EXPORT functionality.
2358 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2359 authenticator to fail if there's a tab character in the incoming data
2360 (there should never be unless someone is messing about, as it's supposed
2361 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2362 if the connection is using TLS or if the remote IP is the same as the
2363 local IP, and the "valid-client-cert option" if a client certificate has
2366 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2367 authenticators. This can be used for authorization after authentication
2368 succeeds. (In the case of plaintext, it servers for both authentication
2371 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2372 if any retry times were supplied.
2374 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2375 connection, where there is no client IP address to check. In this
2376 situation, the verify now always succeeds.
2378 PH/25 Applied John Jetmore's -Mset patch.
2380 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2382 PH/27 In a string expansion for a processed (not raw) header when multiple
2383 headers of the same name were present, leading whitespace was being
2384 removed from all of them, but trailing whitespace was being removed only
2385 from the last one. Now trailing whitespace is removed from each header
2386 before concatenation. Completely empty headers in a concatenation (as
2387 before) are ignored.
2389 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2390 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2392 PH/29 [Removed. This was a change that I later backed out, and forgot to
2393 correct the ChangeLog entry (that I had efficiently created) before
2394 committing the later change.]
2396 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2397 address errors (4xx response to RCPT) over the same connection as other
2398 messages routed to the same hosts. Such deliveries are always "forced",
2399 so retry times are not inspected. This resulted in far too many retries
2400 for the affected addresses. The effect occurred only when there were more
2401 hosts than the hosts_max_try setting in the smtp transport when it had
2402 the 4xx errors. Those hosts that it had tried were not added to the list
2403 of hosts for which the message was waiting, so if all were tried, there
2404 was no problem. Two fixes have been applied:
2406 (i) If there are any address or message errors in an SMTP delivery, none
2407 of the hosts (tried or untried) are now added to the list of hosts
2408 for which the message is waiting, so the message should not be a
2409 candidate for sending over the same connection that was used for a
2410 successful delivery of some other message. This seems entirely
2411 reasonable: after all the message is NOT "waiting for some host".
2412 This is so "obvious" that I'm not sure why it wasn't done
2413 previously. Hope I haven't missed anything, but it can't do any
2414 harm, as the worst effect is to miss an optimization.
2416 (ii) If, despite (i), such a delivery is accidentally attempted, the
2417 routing retry time is respected, so at least it doesn't keep
2418 hammering the server.
2420 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2421 in ${readsocket because some servers need this prod.
2423 PH/32 Added some extra debug output when updating a wait-xxx database.
2425 PH/33 The hint "could be header name not terminated by colon", which has been
2426 given for certain expansion errors for a long time, was not being given
2427 for the ${if def:h_colon_omitted{... case.
2429 PH/34 The spec says: "With one important exception, whenever a domain list is
2430 being scanned, $domain contains the subject domain." There was at least
2431 one case where this was not true.
2433 PH/35 The error "getsockname() failed: connection reset by peer" was being
2434 written to the panic log as well as the main log, but it isn't really
2435 panic-worthy as it just means the connection died rather early on. I have
2436 removed the panic log writing for the ECONNRESET error when getsockname()
2439 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2440 runs only) independently of the message's sender address. This meant
2441 that, if the 4xx error was in fact related to the sender, a different
2442 message to the same recipient with a different sender could confuse
2443 things. In particular, this can happen when sending to a greylisting
2444 server, but other circumstances could also provoke similar problems.
2445 I have changed the default so that the retry time for these errors is now
2446 based a combination of the sender and recipient addresses. This change
2447 can be overridden by setting address_retry_include_sender=false in the
2450 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2451 remote server are returned as part of bounce messages. This was not
2452 happening for LMTP over a pipe (the lmtp transport), but now it is the
2453 same for both kinds of LMTP.
2455 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2456 in header lines that were in fact CNAMEs. This is no longer the case.
2458 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2459 and queue runs started by the daemon processed all messages. This has
2460 been fixed so that -R and -S can now usefully be given with -q<time>.
2462 PH/40 Import PCRE release 6.7 (fixes some bugs).
2464 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2466 PH/42 Give an error if -q is specified more than once.
2468 PH/43 Renamed the variables $interface_address and $interface_port as
2469 $received_ip_address and $received_port, to make it clear that these
2470 values apply to message reception, and not to the outgoing interface when
2471 a message is delivered. (The old names remain recognized, of course.)
2473 PH/44 There was no timeout on the connect() call when using a Unix domain
2474 socket in the ${readsocket expansion. There now is.
2476 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2477 be meaningful with "accept".
2479 SC/01 Eximstats V1.43
2480 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2482 SC/02 Eximstats V1.44
2483 Use a glob alias rather than an array ref in the generated
2484 parser. This improves both readability and performance.
2486 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2487 Collect SpamAssassin and rejection statistics.
2488 Don't display local sender or destination tables unless
2489 there is data to show.
2490 Added average volumes into the top table text output.
2492 SC/04 Eximstats V1.46
2493 Collect data on the number of addresses (recipients)
2494 as well as the number of messages.
2496 SC/05 Eximstats V1.47
2497 Added 'Message too big' to the list of mail rejection
2498 reasons (thanks to Marco Gaiarin).
2500 SC/06 Eximstats V1.48
2501 Mainlog lines which have GMT offsets and are too short to
2502 have a flag are now skipped.
2504 SC/07 Eximstats V1.49 (Alain Williams)
2505 Added the -emptyok flag.
2507 SC/08 Eximstats V1.50
2508 Fixes for obtaining the IP address from reject messages.
2510 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2511 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2512 whitespace changes from 4.64-PH/27
2514 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2517 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2518 are found, allow negative numbers in numeric criteria)
2520 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2522 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2523 to match changes made in 4.64-PH/43
2525 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2527 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2528 "domain" is actually an IP address, and force a failure. This locks out
2529 those revolvers/nameservers that support "A-for-A" lookups, in
2530 contravention of the specifications.
2532 PH/48 When a host name was looked up from an IP address, and the subsequent
2533 forward lookup of the name timed out, the host name was left in
2534 $sender_host_name, contrary to the specification.
2536 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2537 restricted to single-key lookups, Exim was not diagnosing an error if
2538 * or *@ was used with a query-style lookup.
2540 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2542 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2543 long ago, but noone interested enough thought of it. Let's just say that
2544 the "1.1" means that there are some new functions that weren't there at
2545 some point in the past.
2547 PH/51 Error processing for expansion failure of helo_data from an smtp
2548 transport during callout processing was broken.
2550 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2551 tested/used via the -bh/-bhc/-bs options.
2553 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2554 bug, fixed in subsequent PCRE releases).
2556 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2557 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2559 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2565 SC/01 Use a glob alias rather than an array ref in eximstats generated
2566 parser. This improves both readability and performance.
2568 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2569 Don't display local sender or destination tables in eximstats unless
2570 there is data to show.
2571 Added average volumes into the eximstats top table text output.
2573 SC/03 Collect data on the number of addresses (recipients) as well
2574 as the number of messages in eximstats.
2576 TF/01 Correct an error in the documentation for the redirect router. Exim
2577 does (usually) call initgroups() when daemonizing.
2579 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2580 with consistent privilege compared to when running as a daemon.
2582 TF/03 Note in the spec that $authenticated_id is not set for local
2583 submissions from trusted users.
2585 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2586 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2588 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2589 by adding some example configuration directives to the default
2590 configuration file. A little bit of work is required to uncomment the
2591 directives and define how usernames and passwords are checked, but
2592 there is now a framework to start from.
2594 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2595 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2596 without this. I don't know how relevant this is to other LDAP libraries.
2598 PH/02 Add the verb name to the "unknown ACL verb" error.
2600 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2602 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2604 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2605 directory not expanded when it should be if an expanded home directory
2606 was set for the address (which is overridden by the transport).
2608 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2611 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2612 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2613 because it is too late at that time, and has no effect.
2615 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2616 security issue with \' (bugzilla #107). I could not use the
2617 PQescapeStringConn() function, because it needs a PGconn value as one of
2620 PH/08 When testing addresses using -bt, indicate those final addresses that
2621 are duplicates that would not cause an additional delivery. At least one
2622 person was confused, thinking that -bt output corresponded to deliveries.
2623 (Suppressing duplicates isn't a good idea as you lose the information
2624 about possibly different redirections that led to the duplicates.)
2626 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2627 systems where poll() doesn't work, in particular OS X.
2629 PH/10 Added more information to debugging output for retry time not reached.
2631 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2632 operations in malware.c.
2634 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2637 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2638 syslog_duplication set false, log lines that would normally be written
2639 both the the main log and to the reject log were not written to syslog at
2642 PH/14 In the default configuration, change the use of "message" in ACL warn
2643 statements to "add_header".
2645 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2646 not followed by a command (e.g. "seen endif").
2648 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2649 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2652 PH/17 Added extra conditions to the default value of delay_warning_condition
2656 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2657 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2658 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2661 The Auto-Submitted: and various List- headers are standardised, whereas I
2662 don't think Precedence: ever was.
2664 PH/18 Refactored debugging code in route_finduser() to show more information,
2665 in particular, the error code if getpwnam() issues one.
2667 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2668 This is apparently needed in addition to the PH/07 change above to avoid
2669 any possible encoding problems.
2671 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2672 but not after initializing Perl.
2674 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2675 output them only if debugging. By default they are written stderr,
2676 apparently, which is not desirable.
2678 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2681 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2684 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2686 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2687 authenticated or an ident call has been made. Suppress the default
2688 values for $authenticated_id and $authenticated_sender (but permit -oMai
2689 and -oMas) when testing with -bh.
2691 PH/24 Re-jigged the order of the tests in the default configuration so that the
2692 tests for valid domains and recipients precede the DNS black list and CSA
2693 tests, on the grounds that those ones are more expensive.
2695 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2696 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2697 This bug exists in every version of Exim that I still have, right back to
2700 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2701 However, an attempt to turn on case-sensitivity in a regex key by
2702 including (?-i) didn't work because the subject string was already
2703 lowercased, and the effects were non-intuitive. It turns out that a
2704 one-line patch can be used to allow (?-i) to work as expected.
2710 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2711 other effects) broke the use of negated acl sub-conditions.
2713 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2716 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2717 "Deny" causes Exim to reject the incoming connection with a 554 error.
2718 Unfortunately, if there is a major crisis, such as a disk failure,
2719 tcp-wrappers gives "deny", whereas what one would like would be some
2720 kind of temporary error. A kludge has been added to help with this.
2721 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2722 554 error is used if errno is still zero or contains ENOENT (which occurs
2723 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2726 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2728 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2729 errors. Otherwise a message that provokes a temporary error (when other
2730 messages do not) can cause a whole host to time out.
2732 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2733 addresses were routed directly to files or pipes from a redirect router.
2734 File deliveries just didn't batch; pipe deliveries might have suffered
2737 PH/06 A failure to get a lock for a hints database would erroneously always say
2738 "Failed to get write lock", even when it was really a read lock.
2740 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2741 of 0600. This has been changed to use the value of the lockfile_mode
2742 option (which defaults to 0600).
2744 PH/08 Applied small patch from the Sieve maintainer.
2746 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2747 folder from quota calculations, a direct delivery into this folder messed
2748 up the contents of the maildirsize file. This was because the regex was
2749 used only to exclude .Trash (or whatever) when the size of the mailbox
2750 was calculated. There was no check that a delivery was happening into an
2751 excluded directory. This bug has been fixed by ignoring all quota
2752 processing for deliveries into excluded directories.
2754 PH/10 Added the maildirfolder_create_regex option to appendfile.
2760 PH/01 The code for finding all the local interface addresses on a FreeBSD
2761 system running IPv6 was broken. This may well have applied to all BSD
2762 systems, as well as to others that have similar system calls. The broken
2763 code found IPv4 interfaces correctly, but gave incorrect values for the
2764 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2765 that it would not match correctly against @[] and not recognize the IPv6
2768 PH/02 The ipliteral router was not recognizing addresses of the form user@
2769 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2771 PH/03 Added disable_ipv6.
2773 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2774 decoded form, because it is most often used to construct To: headers
2775 lines in autoreplies, and the decoded form may well be syntactically
2776 invalid. However, $reply_address has leading white space removed, and all
2777 newlines turned into spaces so that the autoreply transport does not
2780 PH/05 If group was specified without a user on a router, and no group or user
2781 was specified on a transport, the group from the router was ignored.
2783 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2784 for visible compile-time settings that can be used to change these
2785 numbers, for those that want even more. Backwards compatibility with old
2786 spool files has been maintained. However, going back to a previous Exim
2787 release will lost any variables that are in spool files.
2789 PH/07 Two small changes when running in the test harness: increase delay when
2790 passing a TCP/IP connection to a new process, in case the original
2791 process has to generate a bounce, and remove special handling of
2792 127.0.0.2 (sic), which is no longer necessary.
2794 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2795 be the same on different OS.
2797 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2800 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2801 whether --show-vars was specified or not
2803 JJ/02 exipick: Added support for new ACL variable spool format introduced
2806 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2807 syntactically invalid From: or Reply-to: line, and a filter used this to
2808 generate an autoreply, and therefore failed to obtain an address for the
2809 autoreply, Exim could try to deliver to a non-existent relative file
2810 name, causing unrelated and misleading errors. What now happens is that
2811 it logs this as a hard delivery error, but does not attempt to create a
2814 PH/11 The exinext utility has a -C option for testing purposes, but although
2815 the given file was scanned by exinext itself; it wasn't being passed on
2816 when Exim was called.
2818 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2819 an end-of-file indication when reading a command response.
2821 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2822 compiled. In many other places in Exim, IPv6 addresses are always
2823 recognized, so I have changed this. It also means that IPv4 domain
2824 literals of the form [IPV4:n.n.n.n] are now always recognized.
2826 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2827 used if the router is not running as root, for example, when verifying at
2828 ACL time, or when using -bh. The debugging output from this situation was
2829 non-existent - all you got was a failure to exec. I have made two
2832 (a) Failures to set uid/gid, the current directory, or a process leader
2833 in a subprocess such as that created by queryprogram now generate
2834 suitable debugging output when -d is set.
2836 (b) The queryprogram router detects when it is not running as root,
2837 outputs suitable debugging information if -d is set, and then runs
2838 the subprocess without attempting to change uid/gid.
2840 PH/15 Minor change to Makefile for building test_host (undocumented testing
2843 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2844 additional section of a DNS packet that returns MX or SRV records.
2845 Instead, it always explicitly searches for A/AAAA records. This avoids
2846 major problems that occur when a DNS server includes only records of one
2847 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2848 fixed another bug: if SRV records were looked up and the corresponding
2849 address records were *not* found in the additional section, the port
2850 values from the SRV records were lost.
2852 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2853 using the correct key (the original address) when searching the retry
2854 rules in order to find which one to use for generating the retry hint.
2856 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2857 adding the default one. Similarly, if it contains a Reply-To: header, the
2858 errors_reply_to option, if set, is not used.
2860 PH/19 When calculating a retry time, Exim used to measure the "time since
2861 failure" by looking at the "first failed" field in the retry record. Now
2862 it does not use this if it is later than than the arrival time of the
2863 message. Instead it uses the arrival time. This makes for better
2864 behaviour in cases where some deliveries succeed, thus re-setting the
2865 "first failed" field. An example is a quota failure for a huge message
2866 when small messages continue to be delivered. Without this change, the
2867 "time since failure" will always be short, possible causing more frequent
2868 delivery attempts for the huge message than are intended.
2869 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2871 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2872 $1, $2, $3) because the numerical variables can be reset during some
2873 expansion items (e.g. "match"), thereby losing the authentication data.
2875 PH/21 Make -bV show the size of off_t variables so that the test suite can
2876 decide whether to run tests for quotas > 2G.
2878 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2879 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2880 filecount value is greater than 2G or if a quota value is greater than 2G
2881 on a system where the size of off_t is not greater than 4, a panic error
2884 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2885 never match. The debug and -bh output now contains an explicit error
2886 message indicating a malformed IPv4 address or mask.
2888 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2889 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2890 PH/23 above applies.
2892 PH/25 Do not write to syslog when running in the test harness. The only
2893 occasion when this arises is a failure to open the main or panic logs
2894 (for which there is an explicit test).
2896 PH/26 Added the /no_tell option to "control=freeze".
2898 PH/27 If a host name lookup failed very early in a connection, for example, if
2899 the IP address matched host_lookup and the reverse lookup yielded a name
2900 that did not have a forward lookup, an error message of the form "no IP
2901 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2902 could be logged. Now it outputs the IP address instead of "NULL".
2904 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2905 allows the sender and the authenticated sender to be set when
2906 submitting a message from within Exim. Since child_open_exim() is
2907 documented for local_scan(), the new function should be too.
2909 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2910 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2911 results in an empty string is now treated as unset.
2913 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2915 PH/31 Added sender_verify_fail logging option.
2917 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2918 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2919 tidied the source and removed it altogether.
2921 PH/33 When a queue run was abandoned because the load average was too high, a
2922 log line was always written; now it is written only if the queue_run log
2923 selector is set. In addition, the log line for abandonment now contains
2924 information about the queue run such as the pid. This is always present
2925 in "start" and "stop" lines but was omitted from the "abandon" line.
2927 PH/34 Omit spaces between a header name and the colon in the error message that
2928 is given when verify = headers_syntax fails (if there are lots of them,
2929 the message gets confusing).
2931 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2932 names, as there are now some PTR records that contain slashes. This check
2933 is only to protect against broken name servers that fall over on strange
2934 characters, so the fact that it applies to all lookups doesn't matter.
2936 PH/36 Now that the new test suite is complete, we can remove some of the
2937 special code in Exim that was needed for the old test suite. For example,
2938 sorting DNS records because real resolvers return them in an arbitrary
2939 order. The new test suite's fake resolver always returns records in the
2942 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2943 bounces) except when queue_only is set, to avoid logging races between
2944 the different processes.
2946 PH/38 Panic-die if .include specifies a non-absolute path.
2948 PH/39 A tweak to the "H" retry rule from its user.
2950 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2951 a label. They prevented compilation on older perls.
2953 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2954 a warning to be raised on newish perls.
2956 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2957 on queue. Changes to match documented behaviour of showing count of
2958 messages matching specified criteria.
2960 PH/40 Changed the default ident timeout from 30s to 5s.
2962 PH/41 Added support for the use of login_cap features, on those BSD systems
2963 that have them, for controlling the resources used by pipe deliveries.
2965 PH/42 The content-scanning code uses fopen() to create files in which to put
2966 message data. Previously it was not paying any attention to the mode of
2967 the files. Exim runs with umask(0) because the rest of the code creates
2968 files with open(), and sets the required mode explicitly. Thus, these
2969 files were ending up world-writeable. This was not a big issue, because,
2970 being within the spool directory, they were not world-accessible. I have
2971 created a function called modefopen, which takes an additional mode
2972 argument. It sets umask(777), creates the file, chmods it to the required
2973 mode, then resets the umask. All the relevant calls to fopen() in the
2974 content scanning code have been changed to use this function.
2976 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2977 to 24 hours. This avoids potential overflow problems when processing G
2978 and H retry rules. I suspect nobody ever tinkers with this value.
2980 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2982 PH/45 When the plaintext authenticator is running as a client, the server's
2983 challenges are checked to ensure they are valid base64 strings. By
2984 default, the authentication attempt is cancelled if an invalid string is
2985 received. Setting client_ignore_invalid_base64 true ignores these errors.
2986 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2987 they are received. Thus, the responses can be made to depend on the
2988 challenges. If an invalid string is ignored, an empty string is placed in
2991 PH/46 Messages that are created by the autoreply transport now contains a
2992 References: header, in accordance with RFCs 2822 and 3834.
2994 PH/47 Added authenticated_sender_force to the smtp transport.
2996 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2998 PH/49 Installed latest patch from the Sieve maintainer.
3000 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3001 was also set, the appendfile transport was unnecessarily scanning a
3002 directory of message files (e.g. for maildir delivery) to find the count
3003 of files (along with the size), even though it did not need this
3004 information. It now does the scan only if it needs to find either the
3005 size of the count of files.
3007 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3009 PH/52 Two bugs concerned with error handling when the smtp transport is
3012 (i) Exim was not creating retry information for temporary errors given
3013 for individual recipients after the DATA command when the smtp transport
3014 was used in LMTP mode. This meant that they could be retried too
3015 frequently, and not timed out correctly.
3017 (ii) Exim was setting the flag that allows error details to be returned
3018 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3019 recipients that were returned after the DATA command.
3021 PH/53 This is related to PH/52, but is more general: for any failing address,
3022 when detailed error information was permitted to be returned to the
3023 sender, but the error was temporary, then after the final timeout, only
3024 "retry timeout exceeded" was returned. Now it returns the full error as
3025 well as "retry timeout exceeded".
3027 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3028 do this, and (what is worse) MTAs that accept it.
3030 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3031 will now be deprecated.
3033 PH/56 New os.c-cygwin from the Cygwin maintainer.
3035 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3036 formats (previously only available in exim formats via -bpr, -bpru,
3037 and -bpra. Now also available in native and exiqgrep formats)
3039 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3040 with very large, slow to parse queues
3042 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3044 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3046 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3047 responses to authentication challenges, though it was showing the
3048 challenges; (ii) I've removed the CR characters from the debug output for
3051 PH/58 Allow for the insertion of a newline as well as a space when a string
3052 is turned into more than one encoded-word during RFC 2047 encoding. The
3053 Sieve code now uses this.
3055 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3056 data_4xx, lost_connection, tls_required.
3058 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3059 message was being sent as an SMTP response.
3061 PH/61 Add -l and -k options to exicyclog.
3063 PH/62 When verifying, if an address was redirected to one new address, so that
3064 verification continued, and the new address failed or deferred after
3065 having set something in $address_data, the value of $address_data was not
3066 passed back to the ACL. This was different to the case when no
3067 redirection occurred. The value is now passed back in both cases.
3069 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3070 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3071 use login_cap.h, so on its own it isn't the distinguishing feature. The
3072 new name refers directly to the setclassresources() function.
3074 PH/65 Added configuration files for NetBSD3.
3076 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3078 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3079 is preferred over IPv4.
3081 PH/68 The bounce_return_message and bounce_return_body options were not being
3082 honoured for bounces generated during the reception of non-SMTP messages.
3083 In particular, this applied to messages rejected by the ACL. This bug has
3084 been fixed. However, if bounce_return_message is true and bounce_return_
3085 body is false, the headers that are returned for a non-SMTP message
3086 include only those that have been read before the error was detected.
3087 (In the case of an ACL rejection, they have all been read.)
3089 PH/69 The HTML version of the specification is now built in a directory called
3090 spec_html instead of spec.html, because the latter looks like a path with
3091 a MIME-type, and this confuses some software.
3093 PH/70 Catch two compiler warnings in sieve.c.
3095 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3096 function verify_get_ident() calls ip_connect() to connect a socket, but
3097 if the "connect()" function timed out, ip_connect() used to close the
3098 socket. However, verify_get_ident() also closes the socket later, and in
3099 between Exim writes to the log, which may get opened at this point. When
3100 the socket was closed in ip_connect(), the log could get the same file
3101 descriptor number as the socket. This naturally causes chaos. The fix is
3102 not to close the socket in ip_connect(); the socket should be closed by
3103 the function that creates it. There was only one place in the code where
3104 this was missing, in the iplookup router, which I don't think anybody now
3105 uses, but I've fixed it anyway.
3107 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3108 well as to direct DNS lookups. Otherwise the handling of names in host
3109 lists is inconsistent and therefore confusing.
3115 PH/01 Two changes to the default runtime configuration:
3117 (1) Move the checks for relay_from_hosts and authenticated clients from
3118 after to before the (commented out) DNS black list checks.
3120 (2) Add control=submission to the relay_from_hosts and authenticated
3121 clients checks, on the grounds that messages accepted by these
3122 statements are most likely to be submissions.
3124 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3126 (1) Generate an error if the third argument for the ${prvs expansion is
3129 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3132 (3) Reset the variables that are obtained from the first argument of
3133 ${prvscheck and used in the second argument before leaving the code,
3134 because their memory is reclaimed, so using them afterwards may do
3137 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3138 one (it's much easier than Tom thought :-).
3140 (5) Because of (4), we can now allow for the use of $prvscheck_result
3141 inside the third argument.
3143 PH/03 For some reason, the default setting of PATH when running a command from
3144 a pipe transport was just "/usr/bin". I have changed it to
3147 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3148 anything to be listed in the output from -bV.
3150 PH/05 When a filter generated an autoreply, the entire To: header line was
3151 quoted in the delivery log line, like this:
3153 => >A.N.Other <ano@some.domain> <original@ddress> ...
3155 This has been changed so that it extracts the operative address. There
3156 may be more than one such address. If so, they are comma-separated, like
3159 => >ano@some.domain,ona@other.domain <original@ddress> ...
3161 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3162 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3163 not being looked up in the rDNS to get a host name, Exim was showing the
3164 IP address twice in Received: lines, even though the IP addresses were
3165 identical. For example:
3167 Received: from [1.2.3.4] (helo=[1.2.3.4])
3169 However, if the real host name was known, it was omitting the HELO data
3170 if it matched the actual IP address. This has been tidied up so that it
3171 doesn't show the same IP address twice.
3173 PH/07 When both +timestamp and +memory debugging was on, the value given by
3174 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3175 called by the debug printing, thereby overwriting the timestamp buffer.
3176 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3178 PH/08 When the original message was included in an autoreply transport, it
3179 always said "this is a copy of the message, including all the headers",
3180 even if body_only or headers_only was set. It now gives an appropriate
3183 PH/09 Applied a patch from the Sieve maintainer which:
3185 o fixes some comments
3186 o adds the (disabled) notify extension core
3187 o adds some debug output for the result of if/elsif tests
3188 o points to the current vacation draft in the documentation
3189 and documents the missing references header update
3193 o fixes a bug in processing the envelope test (when testing
3194 multiple envelope elements, the last element determined the
3197 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3198 Electronic Mail") by including:
3200 Auto-submitted: auto-generated
3202 in the messages that it generates (bounce messages and others, such as
3203 warnings). In the case of bounce messages for non-SMTP messages, there was
3204 also a typo: it was using "Auto_submitted" (underscore instead of
3205 hyphen). Since every message generated by Exim is necessarily in response
3206 to another message, thes have all been changed to:
3208 Auto-Submitted: auto-replied
3210 in accordance with these statements in the RFC:
3212 The auto-replied keyword:
3214 - SHOULD be used on messages sent in direct response to another
3215 message by an automatic process,
3217 - MUST NOT be used on manually-generated messages,
3219 - MAY be used on Delivery Status Notifications (DSNs) and Message
3220 Disposition Notifications (MDNs),
3222 - MUST NOT be used on messages generated by automatic or periodic
3223 processes, except for messages which are automatic responses to
3226 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3227 to the default Received: header definition.
3229 PH/12 Added log selector acl_warn_skipped (default on).
3231 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3232 variables because (a) they are in the wrong storage pool and (b) even if
3233 they were copied, it wouldn't work properly because of the caching.
3235 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3236 checking when decoding. Apparently there are clients that generate
3237 overlong encoded strings. Why am I not surprised?
3239 PH/15 If the first argument of "${if match_address" was not empty, but did not
3240 contain an "@" character, Exim crashed. Now it writes a panic log message
3241 and treats the condition as false.
3243 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3245 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3246 extension "envelope-auth". The code is finished and in agreement with
3247 other implementations, but there is no documentation so far and in fact,
3248 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3249 not changing the active code.
3251 Print executed "if" and "elsif" statements when debugging is used. This
3252 helps a great deal to understand what a filter does.
3254 Document more things not specified clearly in RFC3028. I had all this
3255 sorted out, when out of a sudden new issues came to my mind. Oops."
3257 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3260 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3261 canonical form (as documented). However, after a host name lookup from
3262 the IP address, check_host() was doing a simple string comparison with
3263 addresses acquired from the DNS when checking that the found name did
3264 have the original IP as one of its addresses. Since any found IPv6
3265 addresses are likely to be in abbreviated form, the comparison could
3266 fail. Luckily, there already exists a function for doing the comparison
3267 by converting both addresses to binary, so now that is used instead of
3268 the text comparison.
3270 PH/20 There was another similar case to PH/19, when a complete host name was
3271 given in a host list; looking up its IP address could give an abbreviated
3272 form, whereas the current host's name might or might not be abbreviated.
3273 The same fix has been applied.
3279 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3280 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3283 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3284 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3286 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3288 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3289 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3290 Also, for "Auto-Submitted", treat anything other than "no" as
3291 non-personal, in accordance with RFC 3834. (Previously it treated
3292 anything starting "auto-" as non-personal.)
3294 TF/01 The control=submission/name=... option had a problem with syntax
3295 errors if the name included a slash character. The /name= option
3296 now slurps the rest of the string, so it can include any characters
3297 but it must come last in the list of options (after /sender_retain
3300 PH/05 Some modifications to the interface to the fake nameserver for the new
3308 TK/01 Added the "success_on_redirect" address verification option. See
3309 NewStuff for rationale and an example.
3311 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3313 PH/02 Patch to exigrep to allow it to work on syslog lines.
3315 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3316 fread() to skip over the body file's header line, because in Cygwin the
3317 header line is locked and is inaccessible.
3319 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3320 co-exist for some time) to make it clear that it is the Exim ID that is
3321 referenced, not the Message-ID: header line.
3323 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3324 string_format() function, because snprintf() does not exist on all
3327 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3328 ${stat: expansion item.
3330 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3331 protocol synchronization error", to keep the pedants happy.
3333 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3334 well as for IRIX systems, when gcc is being used. See the host.c source
3337 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3339 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3342 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3343 transport and to the smtp transport in LMTP mode.
3345 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3347 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3348 run a filter in a subprocess. This could lead to confusion in subsequent
3349 lookups in the parent process. There should also be a search_tidyup() at
3350 the end of the subprocess.
3352 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3353 only if the host matched helo_try_verify_hosts, which caused the
3354 verification to occur when the EHLO/HELO command was issued. The ACL just
3355 tested the remembered result. Now, if a previous verification attempt has
3356 not happened, "verify = helo" does it there and then.
3358 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3360 TK/03 Fix log output including CR from clamd.
3362 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3363 exist provoked a memory error which could cause a segfault.
3365 PH/15 Installed PCRE 6.2
3367 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3369 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3370 of the problem. Specifically, suggested +O2 rather than +O1 for the
3373 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3375 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3376 record, the port was not correctly logged when the outgoing_port log
3377 selector was set (it logged the transort's default port).
3379 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3380 fallback_hosts, and "hosts" in the smtp transport.
3382 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3383 host errors such as "Connection refused".
3385 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3386 authentication with radiusclient 0.4.9:
3388 - Error returned from rc_read_config was caught wrongly
3389 - Username/password not passed on to radius server due to wrong length.
3391 The presumption is that some radiusclient API changes for 4.51/PH/17
3392 were not taken care of correctly. The code is still untested by me (my
3393 Linux distribution still has 0.3.2 of radiusclient), but it was
3394 contributed by a Radius user.
3396 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3397 expanding the "port" option of the smtp transport.
3399 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3400 while reading a MIME header. Thanks to Tom Hughes for a patch.
3402 PH/24 Include config.h inside local_scan.h so that configuration settings are
3405 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3406 that in an ACL for RCPT (for example), you can examine exactly what was
3409 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3410 commands, but it was not correctly comparing the address with the actual
3411 client host address. Thus, it would show the EHLO address in Received:
3412 header lines when this was not necessary.
3414 PH/27 Added the % operator to ${eval:}.
3416 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3417 it should be ignoring failures (because with -C, for example, it has lost
3418 privilege). It wasn't ignoring creation failures other than "already
3421 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3424 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3425 because an input line was too long, either on its own, or by virtue of
3426 too many continuations, the temporary file was not being removed, and the
3427 return code was incorrect.
3429 PH/31 Missing "BOOL" in function definition in filtertest.c.
3431 PH/32 Applied Sieve patches from the maintainer.
3433 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3435 PH/33 Added "verify = not_blind".
3437 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3438 Local/Makefile (with some defaults set). These are used in built scripts
3439 such as exicyclog, but they have never been used in the exim_install
3440 script (though there are many overriding facilities there). I have
3441 arranged that the exim_install script now takes note of these two
3444 PH/35 Installed configuration files for Dragonfly.
3446 PH/36 When a locally submitted message by a trusted user did not contain a
3447 From: header, and the sender address was obtained from -f or from an SMTP
3448 MAIL command, and the trusted user did not use -F to supply a sender
3449 name, $originator_name was incorrectly used when constructing a From:
3450 header. Furthermore, $originator_name was used for submission mode
3451 messages from external hosts without From: headers in a similar way,
3452 which is clearly wrong.
3454 PH/37 Added control=suppress_local_fixups.
3456 PH/38 When log_selector = +received_sender was set, and the addition of the
3457 sender made the log line's construction buffer exactly full, or one byte
3458 less than full, an overflow happened when the terminating "\n" was
3461 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3462 when the result of a list match is failure because a DNS lookup failed.
3464 PH/40 RM_COMMAND is now used in the building process.
3466 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3467 the "build-* directories that it finds.
3469 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3470 address in a domain literal was a prefix of an interface address.
3472 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3473 when verifying a sender address, unless rewrite_headers is false.
3475 PH/44 Wrote a long comment about why errors_to addresses are verified as
3476 recipients, not senders.
3478 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3479 the ratelimit ACL was added.
3481 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3483 PH/46 Added extra information about PostgreSQL errors to the error string.
3485 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3486 avoiding the need to install special zones in a real server. This is
3487 backwards compatible; if it can't find the fake resolver, it drops back.
3488 Thus, both old and new test suites can be run.
3490 TF/02 Added util/ratelimit.pl
3492 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3493 clock is set back in time.
3495 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3496 Candler <B.Candler@pobox.com>.
3498 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3499 OK for addresses that are the result of redirections.
3501 PH/48 A number of further additions for the benefit of the new test suite,
3502 including a fake gethostbyname() that interfaces to the fake DNS resolver
3505 TF/06 The fix for widen_domains has also been applied to qualify_single and
3506 search_parents which are the other dnslookup options that can cause
3509 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3512 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3514 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3515 service" if it encountered an MX record with an empty target hostname.
3516 The message is now "an MX or SRV record indicated no SMTP service".
3518 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3519 if the DNS of the sending site is misconfigured. This is quite a
3520 common situation. This change restores the behaviour of treating a
3521 helo verification defer as a failure.
3523 PH/51 If self=fail was set on a router, the bounce message did not include the
3524 actual error message.
3530 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3532 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3533 command itself ended in error, the underlying message about the transport
3534 filter timeout was being overwritten with the pipe command error. Now the
3535 underlying error message should be appended to the second error message.
3537 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3539 PH/02 Reduce the amount of output that "make" produces by default. Full output
3540 can still be requested.
3542 PH/03 The warning log line about a condition test deferring for a "warn" verb
3543 was being output only once per connection, rather than after each
3544 occurrence (because it was using the same function as for successful
3545 "warn" verbs). This seems wrong, so I have changed it.
3547 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3548 it should not have, which might have caused a crash in the right
3549 circumstances, but probably never did.
3551 PH/04 Installed a modified version of Tony Finch's patch to make submission
3552 mode fix the return path as well as the Sender: header line, and to
3553 add a /name= option so that you can make the user's friendly name appear
3556 TF/03 Added the control = fakedefer ACL modifier.
3558 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3559 Mark Lowes for thorough testing.
3561 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3563 TK/03 Merged latest SRS patch from Miles Wilton.
3565 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3566 with the definition in sysexits.h (which is #included earlier).
3567 Fortunately, Exim does not actually use EX_OK. The code used to try to
3568 preserve the sysexits.h value, by assuming that macro definitions were
3569 scanned for macro replacements. I have been disabused of this notion,
3570 so now the code just undefines EX_OK before #including unistd.h.
3572 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3573 in the smtp transport. When a block could not be written in a single
3574 write() function, the timeout was being re-applied to each part-write.
3575 This seems wrong - if the receiver was accepting one byte at a time it
3576 would take for ever. The timeout is now adjusted when this happens. It
3577 doesn't have to be particularly precise.
3579 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3580 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3582 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3583 without a domain if the check to <postmaster@domain> fails.
3585 SC/01 Eximstats: added -xls and the ability to specify output files
3586 (patch written by Frank Heydlauf).
3588 SC/02 Eximstats: use FileHandles for outputting results.
3590 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3592 SC/04 Eximstats: fixed display of large numbers with -nvr option
3594 SC/05 Eximstats: fixed merging of reports with empty tables.
3596 SC/06 Eximstats: added the -include_original_destination flag
3598 SC/07 Eximstats: removed tabs and trailing whitespace.
3600 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3602 TK/06 MBOX spool code: Add real "From " MBOX separator line
3603 so the .eml file is really in mbox format (even though
3604 most programs do not really care). Patch from Alex Miller.
3606 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3607 The latter is generated from $received_to and is only set if the
3608 message has one envelope recipient. SA can use these headers,
3609 obviously out-of-the-box. Patch from Alex Miller.
3611 PH/08 The ${def test on a variable was returning false if the variable's
3612 value was "0", contrary to what the specification has always said!
3613 The result should be true unless the variable is empty.
3615 PH/09 The syntax error of a character other than { following "${if
3616 def:variable_name" (after optional whitespace) was not being diagnosed.
3617 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3618 accidental colon was present, for example, could give incorrect results.
3620 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3621 result is used (not including appendfile, where other changes are about
3624 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3625 This involved changing a lot of size variables from int to off_t. It
3626 should work with maildirs and everything.
3628 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3629 spamd dying while we are connected to it.
3631 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3634 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3635 function for BDB 4.3.
3637 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3639 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3640 the sources for PCRE have been re-arranged and more files are now
3643 PH/15 The code I had for printing potentially long long variables in PH/11
3644 above was not the best (it lost precision). The length of off_t variables
3645 is now inspected at build time, and an appropriate printing format (%ld
3646 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3647 to be "long long int" or "long int". This is needed for the internal
3648 formatting function string_vformat().
3650 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3651 the configuration file to be ":syslog", then the script "guesses" where
3652 the logs files are, rather than using the compiled in default. In our
3653 case the guess is not the same as the compiled default, so the script
3654 suddenly stopped working when I started to use syslog. The patch checks
3655 to see if log_file_path is "". If so, it attempts to read it from exim
3656 with no configuration file to get the compiled in version, before it
3657 falls back to the previous guessing code."
3659 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3660 implementing BATV in an Exim configuration. See NewStuff for the gory
3663 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3664 Makefile that are specific to HP-UX.
3666 PH/18 If the "use_postmaster" option was set for a recipient callout together
3667 with the "random" option, the postmaster address was used as the MAIL
3668 FROM address for the random test, but not for the subsequent recipient
3669 test. It is now used for both.
3671 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3672 patch removes a few documentation additions to RFC 3028, because the
3673 latest draft now contains them. It adds the new en;ascii-case comparator
3674 and a new error check for 8bit text in MIME parts. Comparator and
3675 require names are now matched exactly. I enabled the subaddress
3676 extension, but it is not well tested yet (read: it works for me)."
3678 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3679 rework some of the code of TK/09 above to avoid the hardwired use of
3680 "%lld" and "long long". Replaced the call to snprintf() with a call to
3683 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3684 records point to non-existent hosts", "retry timeout exceeded", and
3685 "retry time not reached for any host after a long failure period".
3687 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3688 experimental DomainKeys support:
3690 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3691 (2) On an error such as an illegally used "control", the wrong name for
3692 the control was given.
3694 These problems did NOT occur unless DomainKeys support was compiled.
3696 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3698 PH/24 Added ${if match_ip condition.
3700 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3701 databases so that it will be absolutely obvious if a crash occurs in the
3702 DB library. This is a regular occurrence (often caused by mis-matched
3705 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3706 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3707 picked up on a user's system that detects such things. There doesn't seem
3708 to be a gcc warning option for this - only an attribute that has to be
3709 put on the function's prototype. It seems that in Fedora Core 4 they have
3710 set this on a number of new functions. No doubt there will be more in due
3713 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3714 specify a transport. However, if an address that was verified by such a
3715 router was the subject of a callout, Exim crashed because it tried to
3716 read the rcpt_include_affixes from the non-existent transport. Now it
3717 just assumes that the setting of that option is false. This bug was
3718 introduced by 4.51/PH/31.
3720 PH/28 Changed -d+all to exclude +memory, because that information is very
3721 rarely of interest, but it makes the output a lot bigger. People tend to
3722 do -d+all out of habit.
3724 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3725 code in os-type was giving problems when libc.so lives in lib64, like on
3728 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3729 aren't the modern standard, and it seems that some systems' include files
3730 don't always have them. Exim was already checking for some of the newer
3731 ones like T_AAAA, and defining it itself. I've added checks for all the
3732 record types that Exim uses.
3734 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3735 not automatically generating a new one, as it is supposed to. This
3736 prevented TLS from working. If the file did exist, but contained invalid
3737 data, a new version was generated, as expected. It was only the case of a
3738 non-existent file that was broken.
3740 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3741 with a change in libdomainkeys > 0.64.
3743 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3744 from DNS. If the selector record carries the flag, it now has
3745 precedence over the domain-wide flag.
3747 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3749 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3750 the use of a port name that isn't defined in /etc/services) occurred, the
3751 message was deferred as in a normal delivery, and thus remained on the
3752 spool, instead of being failed because of the mua_wrapper setting. This
3753 is now fixed, and I tidied up some of the mua_wrapper messages at the
3756 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3757 the messages in a hash of arrays rather than using individual hashes.
3758 This is a bit cleaner and results in dramatic memory savings, albeit
3759 at a slight CPU cost.
3761 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3762 as requested by Marc Sherman.
3764 SC/10 Eximstats: added histograms for user specified patterns as requested
3767 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3769 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3770 fopen() in the content-scanning modules that did not already have it.
3776 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3777 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3779 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3781 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3783 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3784 to test Sieve filters that use "vacation".
3786 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3787 that changes the way the GnuTLS parameters are stored in the cache file.
3788 The new format can be generated externally. For backward compatibility,
3789 if the data in the cache doesn't make sense, Exim assumes it has read an
3790 old-format file, and it generates new data and writes a new file. This
3791 means that you can't go back to an older release without removing the
3794 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3795 work if there are any delivery delays because "one_time" forces the
3796 parent to be marked "delivered", so its unseen clone is never tried
3797 again. For this reason, Exim now forbids the simultaneous setting of
3800 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3801 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3802 entry if you want to know the details. The fix, however, neglected to
3803 consider the case when local delivery batching is involved. The test for
3804 "previously delivered" was not happening when checking to see if an
3805 address could be batched with a previous (undelivered) one; under
3806 certain circumstances this could lead to multiple deliveries to the same
3809 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3810 in its include files, and this causes problems building Exim.
3812 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3813 header_syntax) but Exim was just ignoring anything given after a slash.
3814 In particular, this caused confusion with an attempt to use "verify =
3815 reverse_host_lookup/defer_ok". An error is now given when options are
3816 supplied for verify items that do not have them. (Maybe reverse_host_
3817 lookup should have a defer_ok option, but that's a different point.)
3819 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3820 defined by RFC 821) to 2048, because there were problems with some AUTH
3821 commands, and RFC 1869 says the size should be increased for extended
3822 SMTP commands that take arguments.
3824 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3827 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3828 "unknown" error; now it says that the functionality isn't in the binary.
3830 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3831 an address' error message when a string expansion fails (syntax or
3832 whatever). Otherwise the password may appear in the log. Following change
3833 PH/42 below, there is no longer a chance of it appearing in a bounce
3836 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3838 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3839 of its addresses was ever tried. (Bugzilla bug #2.)
3841 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3842 the result incorrectly in the debug output. (It correctly added a newline
3843 to what was transported.)
3845 TF/01 Added $received_time.
3847 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3848 commented out examples of how to interface to a virus scanner and to
3849 SpamAssassin. Also added commented examples of av_scanner and
3850 spamd_address settings.
3852 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3853 and controls are allowed in which ACLs. There were a couple of minor
3854 errors. Some of the entries in the conditions table (which is a table of
3855 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3856 negation of where the condition IS allowed.
3858 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3860 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3861 header file does not have a version number, so I've had to invent a new
3862 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3863 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3864 radiusclient), but it was contributed by a Radius user.
3866 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3867 files or directories, for OpenSSL.
3869 PH/19 When an Exim process that is running as root has to create an Exim log
3870 file, it does so in a subprocess that runs as exim:exim so as to get the
3871 ownership right at creation (otherwise, other Exim processes might see
3872 the file with the wrong ownership). There was no test for failure of this
3873 fork() call, which would lead to the process getting stuck as it waited
3874 for a non-existent subprocess. Forks do occasionally fail when resources
3875 run out. I reviewed all the other calls to fork(); they all seem to check
3878 PH/20 When checking for unexpected SMTP input at connect time (before writing
3879 the banner), Exim was not dealing correctly with a non-positive return
3880 from the read() function. If the client had disconnected by this time,
3881 the result was a log entry for a synchronization error with an empty
3882 string after "input=" when read() returned zero. If read() returned -1
3883 (an event I could not check), uninitialized data bytes were printed.
3884 There were reports of junk text (parts of files, etc) appearing after
3887 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3889 PH/22 Added support for macro redefinition, and (re)definition in between
3890 driver and ACL definitions.
3892 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3893 forgetting to use the resulting value; it was using the unexpanded value.
3895 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3896 hadn't been configured. The fix is from Juergen Kreileder, who
3897 understands it better than I do:
3899 "Here's what I see happening with three configured cyrus_sasl
3900 authenticators configured (plain, login, cram-md5):
3902 On startup auth_cyrus_sasl_init() gets called for each of these.
3903 This means three calls to sasl_listmech() without a specified mech_list.
3904 => SASL tests which mechs of all available mechs actually work
3905 => three warnings about OTP not working
3906 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3908 With the patch, sasl_listmech() also gets called three times. But now
3909 SASL's mech_list option is set to the server_mech specified in the the
3910 authenticator. Or in other words, the answer from sasl_listmech()
3911 gets limited to just the mech you're testing for (which is different
3913 => the return list contains just 'plain' or 'login', 'cram-md5' or
3914 nothing depending on the value of ob->server_mech.
3916 I've just tested the patch: Authentication still works fine,
3917 unavailable mechs specified in the exim configuration are still
3918 caught, and the auth.log warnings about OTP are gone."
3920 PH/25 When debugging is enabled, the contents of the command line are added
3921 to the debugging output, even when log_selector=+arguments is not
3924 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3925 answer is "GNU", and only if the return is "GNU/something" is the answer
3928 PH/27 $acl_verify_message is now set immediately after the failure of a
3929 verification in an ACL, and so is available in subsequent modifiers. In
3930 particular, the message can be preserved by coding like this:
3932 warn !verify = sender
3933 set acl_m0 = $acl_verify_message
3935 Previously, $acl_verify_message was set only while expanding "message"
3936 and "log_message" when a very denied access.
3938 PH/28 Modified OS/os.c-Linux with
3940 -#ifndef OS_LOAD_AVERAGE
3941 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3943 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3944 nomenclature these days.)
3946 PH/29 Installed patch from the Sieve maintainer that adds the options
3947 sieve_useraddress and sieve_subaddress to the redirect router.
3949 PH/30 In these circumstances:
3950 . Two addresses routed to the same list of hosts;
3951 . First host does not offer TLS;
3952 . First host accepts first address;
3953 . First host gives temporary error to second address;
3954 . Second host offers TLS and a TLS session is established;
3955 . Second host accepts second address.
3956 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3957 and peerdn, if requested) that were in fact used only for the second
3960 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3961 attention to any local part prefix or suffix that was matched by the
3962 router that accepted the address. It now behaves in the same way as it
3963 does for delivery: the affixes are removed from the local part unless
3964 rcpt_include_affixes is set on the transport.
3966 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3967 timeout during the DATA phase of an incoming message.
3969 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3970 applied a patch sanctioned by the Sieve maintainer.
3972 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3973 the uid or gid is negative. A case of a negative gid caused this to be
3974 noticed. The fix allows for either to be negative.
3976 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3977 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3980 PH/36 The change PH/12 above was broken. Fixed it.
3982 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3983 the grounds that routing the same address twice would always produce the
3984 same answer. This might have been true once, but it is certainly no
3985 longer true now. Routing a child address may depend on the previous
3986 routing that produced that child. Some complicated redirection strategies
3987 went wrong when messages had multiple recipients, and made Exim's
3988 behaviour dependent on the order in which the addresses were given.
3990 I have moved the duplicate checking until after the routing is complete.
3991 Exim scans the addresses that are assigned to local and remote
3992 transports, and removes any duplicates. This means that more work will be
3993 done, as duplicates will always all be routed, but duplicates are
3994 presumably rare, so I don't expect this is of any significance.
3996 For deliveries to pipes, files, and autoreplies, the duplicate checking
3997 still happens during the routing process, since they are not going to be
4000 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4001 It corrects a timeout issue with spamd. This is Ian's comment: "The
4002 background is that sometimes spamd either never reads data from a
4003 connection it has accepted, or it never writes response data. The exiscan
4004 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4005 blindly assumes that writes won't block so it may never time out."
4007 PH/39 Allow G after quota size as well as K and M.
4009 PH/40 The value set for $authenticated_id in an authenticator may not contain
4010 binary zeroes or newlines because the value is written to log lines and
4011 to spool files. There was no check on this. Now the value is run through
4012 the string_printing() function so that such characters are converted to
4013 printable escape sequences.
4015 PH/41 $message_linecount is a new variable that contains the total number of
4016 lines in the message. Compare $body_linecount, which is the count for the
4019 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4020 bounce and delay warning messages, except in certain special cases, which
4023 (a) An SMTP error message from a remote host;
4024 (b) A message specified in a :fail: redirection;
4025 (c) A message specified in a "fail" command in a system filter;
4026 (d) A message specified in a FAIL return from the queryprogram router;
4027 (e) A message specified by the cannot_route_message router option.
4029 In these cases only, Exim does include the error details in bounce and
4030 warning messages. There are also a few cases where bland messages such
4031 as "unrouteable address" or "local delivery error" are given.
4033 PH/43 $value is now also set for the "else" part of a ${run expansion.
4035 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4036 being worked on, but at least Exim now implements the latest version to
4039 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4040 process to complete was treated as a delivery failure, a timeout while
4041 writing the message to the pipe was logged, but erroneously treated as a
4042 successful delivery. Such timeouts include transport filter timeouts. For
4043 consistency with the overall process timeout, these timeouts are now
4044 treated as errors, giving rise to delivery failures by default. However,
4045 there is now a new Boolean option for the pipe transport called
4046 timeout_defer, which, if set TRUE, converts the failures into defers for
4047 both kinds of timeout. A transport filter timeout is now identified in
4050 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4051 systems where "make" and "gmake" are different, calling "gmake" at top
4052 level broke things. I've arranged for the value of $(MAKE) to be passed
4053 from the Makefile to this script so that it can call the same version of
4057 A note about Exim versions 4.44 and 4.50
4058 ----------------------------------------
4060 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4061 changes of various kinds. As a consequence, a big documentation update was
4062 needed. This delayed the release for rather longer than seemed good, especially
4063 in the light of a couple of (minor) security issues. Therefore, the changes
4064 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4065 release. So 4.44 and 4.50 are in effect two different branches that both start
4068 I have left the 4.50 change log unchanged; it contains all the changes since
4069 4.43. The change log for 4.44 is below; many of its items are identical to
4070 those for 4.50. This seems to be the most sensible way to preserve the
4071 historical information.
4077 1. Minor wording change to the doc/README.SIEVE file.
4079 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4080 computation of the current number of files was incorrect.
4082 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4083 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4086 4. Give more explanation in the error message when the command for a transport
4087 filter fails to execute.
4089 5. There are several places where Exim runs a non-Exim command in a
4090 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4091 was being done only for the command run by the queryprogram router. It is
4092 now done for all such subprocesses. The other cases are: ${run, transport
4093 filters, and the commands run by the lmtp and pipe transports.
4095 6. Added CONFIGURE_GROUP build-time option.
4097 7. Some older OS have a limit of 256 on the maximum number of file
4098 descriptors. Exim was using setrlimit() to set 1000 as a large value
4099 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4100 systems. I've change it so that if it can't get 1000, it tries for 256.
4102 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4103 was an oversight, and furthermore, ever since the addition of extra
4104 controls (e.g. 4.43/32), the checks on when to allow different forms of
4105 "control" were broken. There should now be diagnostics for all cases when a
4106 control that does not make sense is encountered.
4108 9. Added the /retain_sender option to "control=submission".
4110 10. $recipients is now available in the predata ACL (oversight).
4112 11. Tidy the search cache before the fork to do a delivery from a message
4113 received from the command line. Otherwise the child will trigger a lookup
4114 failure and thereby defer the delivery if it tries to use (for example) a
4115 cached ldap connection that the parent has called unbind on.
4117 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4118 of $address_data from the recipient verification was clobbered by the
4119 sender verification.
4121 13. The value of address_data from a sender verification is now available in
4122 $sender_address_data in subsequent conditions in the ACL statement.
4124 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4126 15. Added a new option "connect=<time>" to callout options, to set a different
4129 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4130 was its contents. (It was OK if the option was not defined at all.)
4132 17. A "Completed" log line is now written for messages that are removed from
4133 the spool by the -Mrm option.
4135 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4136 information about exactly what failed.
4138 19. Added -dd to debug only the daemon process.
4140 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4141 handles timeouts, both on the server side and network timeouts. Renamed the
4142 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4144 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4145 It is now set to "smtps".
4147 22. $host_address is now set to the target address during the checking of
4148 ignore_target_hosts.
4150 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4151 being passed; this would have caused $sender_host_name to have been used if
4152 matching the list had actually called for a host name (not very likely,
4153 since this list is usually IP addresses). A host name is now passed as
4156 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4157 code that specifies a non-restarting handler (typically sigaction() in
4158 modern systems) in an attempt to fix a rare and obscure crash bug.
4160 25. Narrowed the window for a race in the daemon that could cause it to ignore
4161 SIGCHLD signals. This is not a major problem, because they are used only to
4162 wake it up if nothing else does.
4164 26. A malformed maildirsize file could cause Exim to calculate negative values
4165 for the mailbox size or file count. Odd effects could occur as a result.
4166 The maildirsize information is now recalculated if the size or filecount
4169 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4170 support for a long time. Removed HAVE_SYS_VFS_H.
4172 28. Installed the latest version of exipick from John Jetmore.
4174 29. In an address list, if the pattern was not a regular expression, an empty
4175 subject address (from a bounce message) matched only if the pattern was an
4176 empty string. Non-empty patterns were not even tested. This was the wrong
4177 because it is perfectly reasonable to use an empty address as part of a
4178 database query. An empty address is now tested by patterns that are
4179 lookups. However, all the other forms of pattern expect the subject to
4180 contain a local part and a domain, and therefore, for them, an empty
4181 address still always fails if the pattern is not itself empty.
4183 30. Exim went into a mad DNS loop when attempting to do a callout where the
4184 host was specified on an smtp transport, and looking it up yielded more
4185 than one IP address.
4187 31. Re-factored the code for checking spool and log partition space into a
4188 function that finds that data and another that does the check. The former
4189 is then used to implement four new variables: $spool_space, $log_space,
4190 $spool_inodes, and $log_inodes.
4192 32. The RFC2047 encoding function was originally intended for short strings
4193 such as real names; it was not keeping to the 75-character limit for
4194 encoded words that the RFC imposes. It now respects the limit, and
4195 generates multiple encoded words if necessary. To be on the safe side, I
4196 have increased the buffer size for the ${rfc2047: expansion operator from
4199 33. It is now permitted to omit both strings after an "if" condition; if the
4200 condition is true, the result is "true". As before, when the second string
4201 is omitted, a false condition yields an empty string. This makes it less
4202 cumbersome to write custom ACL and router conditions.
4204 34. Failure to deliver a bounce message always caused it to be frozen, even if
4205 there was an errors_to setting on the router. The errors_to setting is now
4208 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4209 canonical form (fully expanded) before being placed in
4210 $sender_host_address.
4212 36. The table in the code that translates DNS record types into text (T_A to
4213 "A" for instance) was missing entries for NS and CNAME. It is just possible
4214 that this could have caused confusion if both these types were looked up
4215 for the same domain, because the text type is used as part of Exim's
4216 per-process caching. But the chance of anyone hitting this buglet seems
4219 37. The dnsdb lookup has been extended in a number of ways.
4221 (1) There is a new type, "zns", which walks up the domain tree until it
4222 finds some nameserver records. It should be used with care.
4224 (2) There is a new type, "mxh", which is like "mx" except that it returns
4225 just the host names, not the priorities.
4227 (3) It is now possible to give a list of domains (or IP addresses) to be
4228 looked up. The behaviour when one of the lookups defers can be
4229 controlled by a keyword.
4231 (4) It is now possible to specify the separator character for use when
4232 multiple records are returned.
4234 38. The dnslists ACL condition has been extended: it is now possible to supply
4235 a list of IP addresses and/or domains to be looked up in a particular DNS
4238 39. Added log_selector=+queue_time_overall.
4240 40. When running the queue in the test harness, wait just a tad after forking a
4241 delivery process, to get repeatability of debugging output.
4243 41. Include certificate and key file names in error message when GnuTLS fails
4244 to set them up, because the GnuTLS error message doesn't include the name
4245 of the failing file when there is a problem reading it.
4247 42. Allow both -bf and -bF in the same test run.
4249 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4251 44. The "Exiscan patch" is now merged into the mainline Exim source.
4253 45. Sometimes the final signoff response after QUIT could fail to get
4254 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4255 < 0 before doing a fflush(). This bug looks as though it goes back to the
4256 introduction of TLS in release 3.20, but "sometimes" must have been rare
4257 because the tests only now provoked it.
4259 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4260 (this can affect the format of dates).
4262 47. exim_tidydb, when checking for the continued existence of a message for
4263 which it has found a message-specific retry record, was not finding
4264 messages that were in split spool directories. Consequently, it was
4265 deleting retry records that should have stayed in existence.
4267 48. Steve fixed some bugs in eximstats.
4269 49. The SPA authentication driver was not abandoning authentication and moving
4270 on to the next authenticator when an expansion was forced to fail,
4271 contradicting the general specification for all authenticators. Instead it
4272 was generating a temporary error. It now behaves as specified.
4274 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4275 (the order specifies the preference for clients). The order is now AES256,
4276 AES128, 3DES, ARCFOUR128.
4278 51. Small patch to Sieve code - explicitly set From: when generating an
4281 52. Exim crashed if a remote delivery caused a very long error message to be
4282 recorded - for instance if somebody sent an entire SpamAssassin report back
4283 as a large number of 550 error lines. This bug was coincidentally fixed by
4284 increasing the size of one of Exim's internal buffers (big_buffer) that
4285 happened as part of the Exiscan merge. However, to be on the safe side, I
4286 have made the code more robust (and fixed the comments that describe what
4289 53. Now that there can be additional text after "Completed" in log lines (if
4290 the queue_time_overall log selector is set), a one-byte patch to exigrep
4291 was needed to allow it to recognize "Completed" as not the last thing in
4294 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4295 patch that reportedly fixes this has been added. I am not expert enough to
4296 create a test for it. This is what the patch creator wrote:
4298 "I found a little strange behaviour of ldap code when working with
4299 Windows 2003 AD Domain, where users was placed in more than one
4300 Organization Units. When I tried to give exim partial DN, the exit code
4301 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4302 But simultaneously result of request was absolutely normal ldap result,
4303 so I produce this patch..."
4305 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4306 REFERENCE, so I have modified the code to exclude the patch when that macro
4309 55. Some experimental protocols are using DNS PTR records for new purposes. The
4310 keys for these records are domain names, not reversed IP addresses. The
4311 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4312 leaves it alone. Component reversal etc. now happens only for IP addresses.
4315 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4317 57. Double the size of the debug message buffer (to 2048) so that more of very
4318 long debug lines gets shown.
4320 58. The exicyclog utility now does better if the number of log files to keep
4321 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4323 59. Two changes related to the smtp_active_hostname option:
4325 (1) $smtp_active_hostname is now available as a variable.
4326 (2) The default for smtp_banner uses $smtp_active_hostname instead
4327 of $primary_hostname.
4329 60. The host_aton() function is supposed to be passed a string that is known
4330 to be a valid IP address. However, in the case of IPv6 addresses, it was
4331 not checking this. This is a hostage to fortune. Exim now panics and dies
4332 if the condition is not met. A case was found where this could be provoked
4333 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4334 components; fortuitously, this particular loophole had already been fixed
4335 by change 4.50/55 above.
4337 If there are any other similar loopholes, the new check in host_aton()
4338 itself should stop them being exploited. The report I received stated that
4339 data on the command line could provoke the exploit when Exim was running as
4340 exim, but did not say which command line option was involved. All I could
4341 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4342 running as the user.
4345 61. There was a buffer overflow vulnerability in the SPA authentication code
4346 (which came originally from the Samba project). I have added a test to the
4347 spa_base64_to_bits() function which I hope fixes it.
4350 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4351 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4353 63. The daemon start-up calls getloadavg() while still root for those OS that
4354 need the first call to be done as root, but it missed one case: when
4355 deliver_queue_load_max is set with deliver_drop_privilege. This is
4356 necessary for the benefit of the queue runner, because there is no re-exec
4357 when deliver_drop_privilege is set.
4359 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4360 This has been fixed.
4362 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4363 was in use, was not putting the data itself into the right store pool;
4364 consequently, it could be overwritten for a subsequent message in the same
4365 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4368 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4370 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4371 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4372 the function were treating the return as a boolean value, which happened to
4373 work because 0=false and not-0=true, but is not correct code.
4375 68. The host_aton() function was not handling scoped IPv6 addresses (those
4376 with, for example, "%eth0" on the end) correctly.
4378 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4379 negated items (that is, ~something) in unsigned ints. Some compilers
4380 apparently mutter when there is no cast.
4382 70. If an address verification called from an ACL failed, and did not produce a
4383 user-specific message (i.e. there was only a "system" message), nothing was
4384 put in $acl_verify_message. In this situation, it now puts the system
4387 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4388 session; change 4.31/43 added the unwanted input to the log line - except
4389 that it did not do this in the start of session case. It now does.
4391 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4392 This is wrong and can cause the other end to generate a synchronization
4393 error if it is another Exim or anything else that does the synchronization
4394 check. A QUIT command is no longer sent after a timeout.
4396 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4397 during host lookups.
4399 74. The defer_ok option of callout verification was not working if it was used
4400 when verifying addresses in header lines, that is, for this case:
4402 verify = header_sender/callout=defer_ok
4404 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4405 those file descriptors could be used for SMTP connections. If anything
4406 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4407 could be sent to the SMTP client, causing chaos. The daemon now opens
4408 stdin, stdout, and stderr to /dev/null when it puts itself into the
4411 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4412 log by default. The user can override this with suitable Perl magic.
4414 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4415 the log message when discard triggers, was not working for the DATA ACL or
4416 for the non-SMTP ACL.
4418 78. Error message wording change in sieve.c.
4420 79. If smtp_accept_max_per_host was set, the number of connections could be
4421 restricted to fewer than expected, because the daemon was trying to set up
4422 a new connection before checking whether the processes handling previous
4423 connections had finished. The check for completed processes is now done
4424 earlier. On busy systems, this bug wouldn't be noticed because something
4425 else would have woken the daemon, and it would have reaped the completed
4428 80. If a message was submitted locally by a user whose login name contained one
4429 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4430 It caused a spool format error. I have fixed the spool reading code. A
4431 related problem was that the "from" clause in the Received: line became
4432 illegal because of the space(s). It is now covered by ${quote_local_part.
4434 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4437 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4439 83. Patch from Sieve maintainer to fix unterminated string problem in
4440 "vacation" handling.
4442 84. Some minor changes to the Linux configuration files to help with other
4443 OS variants using glibc.
4445 85. One more patch for Sieve to update vacation handling to latest spec.
4448 ----------------------------------------------------
4449 See the note above about the 4.44 and 4.50 releases.
4450 ----------------------------------------------------
4456 1. Change 4.43/35 introduced a bug that caused file counts to be
4457 incorrectly computed when quota_filecount was set in an appendfile
4460 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4461 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4464 3. Give more explanation in the error message when the command for a transport
4465 filter fails to execute.
4467 4. There are several places where Exim runs a non-Exim command in a
4468 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4469 was being done only for the command run by the queryprogram router. It is
4470 now done for all such subprocesses. The other cases are: ${run, transport
4471 filters, and the commands run by the lmtp and pipe transports.
4473 5. Some older OS have a limit of 256 on the maximum number of file
4474 descriptors. Exim was using setrlimit() to set 1000 as a large value
4475 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4476 systems. I've change it so that if it can't get 1000, it tries for 256.
4478 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4479 was an oversight, and furthermore, ever since the addition of extra
4480 controls (e.g. 4.43/32), the checks on when to allow different forms of
4481 "control" were broken. There should now be diagnostics for all cases when a
4482 control that does not make sense is encountered.
4484 7. $recipients is now available in the predata ACL (oversight).
4486 8. Tidy the search cache before the fork to do a delivery from a message
4487 received from the command line. Otherwise the child will trigger a lookup
4488 failure and thereby defer the delivery if it tries to use (for example) a
4489 cached ldap connection that the parent has called unbind on.
4491 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4492 of $address_data from the recipient verification was clobbered by the
4493 sender verification.
4495 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4496 was its contents. (It was OK if the option was not defined at all.)
4498 11. A "Completed" log line is now written for messages that are removed from
4499 the spool by the -Mrm option.
4501 12. $host_address is now set to the target address during the checking of
4502 ignore_target_hosts.
4504 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4505 being passed; this would have caused $sender_host_name to have been used if
4506 matching the list had actually called for a host name (not very likely,
4507 since this list is usually IP addresses). A host name is now passed as
4510 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4511 code that specifies a non-restarting handler (typically sigaction() in
4512 modern systems) in an attempt to fix a rare and obscure crash bug.
4514 15. Narrowed the window for a race in the daemon that could cause it to ignore
4515 SIGCHLD signals. This is not a major problem, because they are used only to
4516 wake it up if nothing else does.
4518 16. A malformed maildirsize file could cause Exim to calculate negative values
4519 for the mailbox size or file count. Odd effects could occur as a result.
4520 The maildirsize information is now recalculated if the size or filecount
4523 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4524 support for a long time. Removed HAVE_SYS_VFS_H.
4526 18. Updated exipick to current release from John Jetmore.
4528 19. Allow an empty sender to be matched against a lookup in an address list.
4529 Previously the only cases considered were a regular expression, or an
4532 20. Exim went into a mad DNS lookup loop when doing a callout where the
4533 host was specified on the transport, if the DNS lookup yielded more than
4536 21. The RFC2047 encoding function was originally intended for short strings
4537 such as real names; it was not keeping to the 75-character limit for
4538 encoded words that the RFC imposes. It now respects the limit, and
4539 generates multiple encoded words if necessary. To be on the safe side, I
4540 have increased the buffer size for the ${rfc2047: expansion operator from
4543 22. Failure to deliver a bounce message always caused it to be frozen, even if
4544 there was an errors_to setting on the router. The errors_to setting is now
4547 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4548 canonical form (fully expanded) before being placed in
4549 $sender_host_address.
4551 24. Updated eximstats to version 1.33
4553 25. Include certificate and key file names in error message when GnuTLS fails
4554 to set them up, because the GnuTLS error message doesn't include the name
4555 of the failing file when there is a problem reading it.
4557 26. Expand error message when OpenSSL has problems setting up cert/key files.
4560 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4561 (this can affect the format of dates).
4563 28. exim_tidydb, when checking for the continued existence of a message for
4564 which it has found a message-specific retry record, was not finding
4565 messages that were in split spool directories. Consequently, it was
4566 deleting retry records that should have stayed in existence.
4568 29. eximstats updated to version 1.35
4569 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4570 1.35 - bugfix such that pie charts by volume are generated correctly
4572 30. The SPA authentication driver was not abandoning authentication and moving
4573 on to the next authenticator when an expansion was forced to fail,
4574 contradicting the general specification for all authenticators. Instead it
4575 was generating a temporary error. It now behaves as specified.
4577 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4578 (the order specifies the preference for clients). The order is now AES256,
4579 AES128, 3DES, ARCFOUR128.
4581 31. Small patch to Sieve code - explicitly set From: when generating an
4584 32. Exim crashed if a remote delivery caused a very long error message to be
4585 recorded - for instance if somebody sent an entire SpamAssassin report back
4586 as a large number of 550 error lines. This bug was coincidentally fixed by
4587 increasing the size of one of Exim's internal buffers (big_buffer) that
4588 happened as part of the Exiscan merge. However, to be on the safe side, I
4589 have made the code more robust (and fixed the comments that describe what
4592 33. Some experimental protocols are using DNS PTR records for new purposes. The
4593 keys for these records are domain names, not reversed IP addresses. The
4594 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4595 leaves it alone. Component reversal etc. now happens only for IP addresses.
4598 34. The host_aton() function is supposed to be passed a string that is known
4599 to be a valid IP address. However, in the case of IPv6 addresses, it was
4600 not checking this. This is a hostage to fortune. Exim now panics and dies
4601 if the condition is not met. A case was found where this could be provoked
4602 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4603 components; fortuitously, this particular loophole had already been fixed
4604 by change 4.50/55 or 4.44/33 above.
4606 If there are any other similar loopholes, the new check in host_aton()
4607 itself should stop them being exploited. The report I received stated that
4608 data on the command line could provoke the exploit when Exim was running as
4609 exim, but did not say which command line option was involved. All I could
4610 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4611 running as the user.
4614 35. There was a buffer overflow vulnerability in the SPA authentication code
4615 (which came originally from the Samba project). I have added a test to the
4616 spa_base64_to_bits() function which I hope fixes it.
4619 36. The daemon start-up calls getloadavg() while still root for those OS that
4620 need the first call to be done as root, but it missed one case: when
4621 deliver_queue_load_max is set with deliver_drop_privilege. This is
4622 necessary for the benefit of the queue runner, because there is no re-exec
4623 when deliver_drop_privilege is set.
4625 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4626 was in use, was not putting the data itself into the right store pool;
4627 consequently, it could be overwritten for a subsequent message in the same
4628 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4631 38. Sometimes the final signoff response after QUIT could fail to get
4632 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4633 < 0 before doing a fflush(). This bug looks as though it goes back to the
4634 introduction of TLS in release 3.20, but "sometimes" must have been rare
4635 because the tests only now provoked it.
4641 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4642 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4643 Now it returns an integer. A number of calls were still expecting a T/F
4644 return. Fortuitously, in all cases, the tests worked in OK situations,
4645 which is the norm. However, things would have gone wrong on any write
4646 failures on the smtp file descriptor. This function is used when sending
4647 messages over SMTP and also when doing verify callouts.
4649 2. When Exim is called to do synchronous delivery of a locally submitted
4650 message (the -odf or -odi options), it no longer closes stderr before doing
4653 3. Implemented the mua_wrapper option.
4655 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4657 5. Implemented the functions header_remove(), header_testname(),
4658 header_add_at_position(), and receive_remove_recipient(), and exported them
4661 6. If an ACL "warn" statement specified the addition of headers, Exim already
4662 inserted X-ACL-Warn: at the start if there was no header name. However, it
4663 was not making this test for the second and subsequent header lines if
4664 there were newlines in the string. This meant that an invalid header could
4665 be inserted if Exim was badly configured.
4667 7. Allow an ACL "warn" statement to add header lines at the start or after all
4668 the Received: headers, as well as at the end.
4670 8. Added the rcpt_4xx retry error code.
4672 9. Added postmaster_mailfrom=xxx to callout verification option.
4674 10. Added mailfrom=xxxx to the callout verification option, for verify=
4677 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4678 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4680 12. Inserted some casts to stop certain compilers warning when using pointer
4681 differences as field lengths or precisions in printf-type calls (mostly
4682 affecting debugging statements).
4684 13. Added optional readline() support for -be (dynamically loaded).
4686 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4687 same clock tick as a message's arrival, so that its received time was the
4688 same as the "first fail" time on the retry record, and that message
4689 remained on the queue past the ultimate address timeout, every queue runner
4690 would try a delivery (because it was past the ultimate address timeout) but
4691 after another failure, the ultimate address timeout, which should have then
4692 bounced the address, did not kick in. This was a "< instead of <=" error;
4693 in most cases the first failure would have been in the next clock tick
4694 after the received time, and all would be well.
4696 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4697 being recognized when the domain list was tested by the match_domain
4698 condition in an expansion string.
4700 16. Added the ${str2b64: operator.
4702 17. Exim was always calling setrlimit() to set a large limit for the number of
4703 processes, without checking whether the existing limit was already
4704 adequate. (It did check for the limit on file descriptors.) Furthermore,
4705 errors from getrlimit() and setrlimit() were being ignored. Now they are
4706 logged to the main and panic logs, but Exim does carry on, to try to do its
4707 job under whatever limits there are.
4709 18. Imported PCRE 5.0.
4711 19. Trivial typo in log message " temporarily refused connection" (the leading
4714 20. If the log selector return_path_on_delivery was set and an address was
4715 redirected to /dev/null, the delivery process crashed because it assumed
4716 that a return path would always be set for a "successful" delivery. In this
4717 case, the whole delivery is bypassed as an optimization, and therefore no
4720 21. Internal re-arrangement: the function for sending a challenge and reading
4721 a response while authentication was assuming a zero-terminated challenge
4722 string. It's now changed to take a pointer and a length, to allow for
4723 binary data in such strings.
4725 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4727 23. Exim was not respecting finduser_retries when seeking the login of the
4728 uid under which it was called; it was always trying 10 times. (The default
4729 setting of finduser_retries is zero.) Also, it was sleeping after the final
4730 failure, which is pointless.
4732 24. Implemented tls_on_connect_ports.
4734 25. Implemented acl_smtp_predata.
4736 26. If the domain in control=submission is set empty, Exim assumes that the
4737 authenticated id is a complete email address when it generates From: or
4738 Sender: header lines.
4740 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4741 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4742 chown and chgrp in /bin and hostname in /usr/bin.
4744 28. Exim was keeping the "process log" file open after each use, just as it
4745 does for the main log. This opens the possibility of it remaining open for
4746 long periods when the USR1 signal hits a daemon. Occasional processlog
4747 errors were reported, that could have been caused by this. Anyway, it seems
4748 much more sensible not to leave this file open at all, so that is what now
4751 29. The long-running daemon process does not normally write to the log once it
4752 has entered its main loop, and it closes the log before doing so. This is
4753 so that log files can straightforwardly be renamed and moved. However,
4754 there are a couple of unusual error situations where the daemon does write
4755 log entries, and I had neglected to close the log afterwards.
4757 30. The text of an SMTP error response that was received during a remote
4758 delivery was being truncated at 512 bytes. This is too short for some of
4759 the long messages that one sometimes sees. I've increased the limit to
4762 31. It is now possible to make retry rules that apply only when a message has a
4763 specific sender, in particular, an empty sender.
4765 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4766 it possible to be selective about when SMTP synchronization is enforced.
4768 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4770 32. Implemented hosts_connection_nolog.
4772 33. Added an ACL for QUIT.
4774 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4777 35. Added mailbox_size and mailbox_filecount to appendfile.
4779 36. Added control = no_multiline_responses to ACLs.
4781 37. There was a bug in the logic of the code that waits for the clock to tick
4782 in the case where the clock went backwards by a substantial amount such
4783 that the microsecond fraction of "now" was more than the microsecond
4784 fraction of "then" (but the whole seconds number was less).
4786 38. Added support for the libradius Radius client library this is found on
4787 FreeBSD (previously only the radiusclient library was supported).
4793 1. When certain lookups returned multiple values in the form name=value, the
4794 quoting of the values was not always being done properly. Specifically:
4795 (a) If the value started with a double quote, but contained no whitespace,
4797 (b) If the value contained whitespace other than a space character (i.e.
4798 tabs or newlines or carriage returns) it was not quoted.
4799 This fix has been applied to the mysql and pgsql lookups by writing a
4800 separate quoting function and calling it from the lookup code. The fix
4801 should probably also be applied to nisplus, ibase and oracle lookups, but
4802 since I cannot test any of those, I have not disturbed their existing code.
4804 2. A hit in the callout cache for a specific address caused a log line with no
4805 reason for rejecting RCPT. Now it says "Previous (cached) callout
4806 verification failure".
4808 3. There was an off-by-one bug in the queryprogram router. An over-long
4809 return line was truncated at 256 instead of 255 characters, thereby
4810 overflowing its buffer with the terminating zero. As well as fixing this, I
4811 have increased the buffer size to 1024 (and made a note to document this).
4813 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4814 when Exim is waiting for an SMTP response from a remote server, Exim
4815 restarts its select() call on the socket, thereby resetting its timeout.
4816 This is not a problem when such interrupts are rare. Somebody set up a cron
4817 job to run exiwhat every 2 minutes, which is less than the normal select()
4818 timeout (5 or 10 minutes). This meant that the select() timeout never
4819 kicked in because it was always reset. I have fixed this by comparing the
4820 time when an interrupt arrives with the time at the start of the first call
4821 to select(). If more time than the timeout has elapsed, the interrupt is
4822 treated as a timeout.
4824 5. Some internal re-factoring in preparation for the addition of Sieve
4825 extensions (by MH). In particular, the "personal" test is moved to a
4826 separate function, and given an option for scanning Cc: and Bcc: (which is
4827 not set for Exim filters).
4829 6. When Exim created an email address using the login of the caller as the
4830 local part (e.g. when creating a From: or Sender: header line), it was not
4831 quoting the local part when it contained special characters such as @.
4833 7. Installed new OpenBSD configuration files.
4835 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4836 try to make them clearer.
4838 9. Callout options, other than the timeout value, were being ignored when
4839 verifying sender addresses in header lines. For example, when using
4841 verify = header_sender/callout=no_cache
4843 the cache was (incorrectly) being used.
4845 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4846 only the Cygwin environment.
4848 11. When return_path_on_delivery was set as a log selector, if different remote
4849 addresses in the same message used different return paths and parallel
4850 remote delivery occurred, the wrong values would sometimes be logged.
4851 (Whenever a remote delivery process finished, the return path value from
4852 the most recently started remote delivery process was logged.)
4854 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4855 lines when AUTH and/or TLS are in use. This is the "received protocol"
4856 field. Exim used to use "asmtp" for authenticated SMTP, without any
4857 indication (in the protocol name) for TLS use. Now it follows the RFC and
4858 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4859 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4860 names appear in log lines as well as in Received: header lines.
4862 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4863 extensions, and comparison tests, and to fix some bugs.
4865 14. Changes to the "personal" filter test:
4867 (1) The test was buggy in that it was just doing the equivalent of
4868 "contains" tests on header lines. For example, if a user's address was
4869 anne@some.where, the "personal" test would incorrectly be true for
4871 To: susanne@some.where
4873 This test is now done by extracting each address from the header in turn,
4874 and checking the entire address. Other tests that are part of "personal"
4875 are now done using regular expressions (for example, to check local parts
4876 of addresses in From: header lines).
4878 (2) The list of non-personal local parts in From: addresses has been
4879 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4880 taken from the Sieve specification recommendations.
4882 (3) If the message contains any header line starting with "List-" it is
4883 treated as non-personal.
4885 (4) The test for "circular" in the Subject: header line has been removed
4886 because it now seems ill-conceived.
4888 15. Minor typos in src/EDITME comments corrected.
4890 16. Installed latest exipick from John Jetmore.
4892 17. If headers_add on a router specified a text string that was too long for
4893 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4894 of string_sprintf() is now avoided.
4896 18. $message_body_size was not set (it was always zero) when running the DATA
4897 ACL and the local_scan() function.
4899 19. For the "mail" command in an Exim filter, no default was being set for
4900 the once_repeat time, causing a random time value to be used if "once" was
4901 specified. (If the value happened to be <= 0, no repeat happened.) The
4902 default is now 0s, meaning "never repeat". The "vacation" command was OK
4903 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4904 (I found it when inspecting the code).
4906 20. There is now an overall timeout for performing a callout verification. It
4907 defaults to 4 times the callout timeout, which applies to individual SMTP
4908 commands during the callout. The overall timeout applies when there is more
4909 than one host that can be tried. The timeout is checked before trying the
4910 next host. This prevents very long delays if there are a large number of
4911 hosts and all are timing out (e.g. when the network connections are timing
4912 out). The value of the overall timeout can be changed by specifying an
4913 additional sub-option for "callout", called "maxwait". For example:
4915 verify = sender/callout=5s,maxwait=20s
4917 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4918 to the end before writing, but this should make it even safer).
4920 22. Exim was forgetting that it had advertised PIPELINING for the second and
4921 subsequent messages on an SMTP connection. It was also not resetting its
4922 memory on STARTTLS and an internal HELO.
4924 23. When Exim logs an SMTP synchronization error within a session, it now
4925 records whether PIPELINING has been advertised or not.
4927 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4928 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4929 rather than long int.
4931 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4933 26. Added the never_mail option to autoreply.
4939 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4940 crash if the getsockname() call failed; this can happen if a connection is
4941 closed very soon after it is established. The problem was simply in the
4942 order in which certain operations were done, causing Exim to try to write
4943 to the SMTP stream before it had set up the file descriptor. The bug has
4944 been fixed by making things happen in the correct order.
4950 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4951 before the connection was closed, thus losing the rejection response.
4953 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4954 some early Solaris releases, but causes trouble in current releases where
4955 socklen_t is defined.
4957 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4960 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4963 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4964 that releasing the top of it at the end releases what was used for sub-
4965 expansions (unless the block got too big). However, discard this block if
4966 the first thing is a variable or header, so that we can use its block when
4967 it is dynamic (useful for very large $message_headers, for example).
4969 6. Lookups now cache *every* query, not just the most recent. A new, separate
4970 store pool is used for this. It can be recovered when all lookup caches are
4971 flushed. Lookups now release memory at the end of their result strings.
4972 This has involved some general refactoring of the lookup sources.
4974 7. Some code has been added to the store_xxx() functions to reduce the amount
4975 of flapping under certain conditions.
4977 8. log_incoming_interface used to affect only the <= reception log lines. Now
4978 it causes the local interface and port to be added to several more SMTP log
4979 lines, for example "SMTP connection from", and rejection lines.
4981 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4983 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4985 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4986 could be overwritten at the end of the current message (or the start of a
4987 new message if it was set in a HELO ACL). The value is now preserved for
4988 the duration of the SMTP connection.
4990 12. If a transport had a headers_rewrite setting, and a matching header line
4991 contained an unqualified address, that address was qualified, even if it
4992 did not match any rewriting rules. The underlying bug was that the values
4993 of the flags that permit the existence of unqualified sender and recipient
4994 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4995 non-local messages, and by -bnq for local messages) were not being
4996 preserved with the message after it was received.
4998 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4999 "next input=" as part of the text comprising the host identity instead of
5000 the correct text. The code was using the same buffer for two different
5001 strings. However, depending on which order the printing function evaluated
5002 its arguments, the bug did not always show up. Under Linux, for example, my
5003 test suite worked just fine.
5005 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5006 doesn't work with some older versions of Perl. It has been changed to "my",
5007 which in any case is probably the better facility to use.
5009 15. A really picky compiler found some instances of statements for creating
5010 error messages that either had too many or two few arguments for the format
5013 16. The size of the buffer for calls to the DNS resolver has been increased
5014 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5015 for addresses that have a lot of PTR records. This alleviates a problem; it
5016 does not fully solve it.
5018 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5019 buffer now truncates the list and logs the incident, which is the same
5020 action as happens when Exim is looking up a host name and its aliases.
5021 Previously in this situation something unpredictable would happen;
5022 sometimes it was "internal error: store_reset failed".
5024 18. If a server dropped the connection unexpectedly when an Exim client was
5025 using GnuTLS and trying to read a response, the client delivery process
5026 crashed while trying to generate an error log message.
5028 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5029 string, for example:
5031 warn message = H1: something\nH2: something
5033 the text was added as a single header line from Exim's point of view
5034 though it ended up OK in the delivered message. However, searching for the
5035 second and subsequent header lines using $h_h2: did not work. This has been
5036 fixed. Similarly, if a system filter added multiple headers in this way,
5037 the routers could not see them.
5039 20. Expanded the error message when iplsearch is called with an invalid key to
5040 suggest using net-iplsearch in a host list.
5042 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5043 ACLs are no longer actually imposed (and a message to that effect is
5046 22. If a "gecos" field in a passwd entry contained escaped characters, in
5047 particular, if it contained a \" sequence, Exim got it wrong when building
5048 a From: or a Sender: header from that name. A second bug also caused
5049 incorrect handling when an unquoted " was present following a character
5050 that needed quoting.
5052 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5053 was not being matched caselessly.
5055 24. Arranged for all hyphens in the exim.8 source to be escaped with
5058 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5059 properly. Recipient callout cache records were still being keyed to include
5060 the sender, even when use_sender was set false. This led to far more
5061 callouts that were necessary. The sender is no longer included in the key
5062 when use_sender is false.
5064 26. Added "control = submission" modifier to ACLs.
5066 27. Added the ${base62d: operator to decode base 62 numbers.
5068 28. dnsdb lookups can now access SRV records.
5070 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5071 the configuration file.
5073 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5074 (-v) mode. This makes the output for a verbose queue run more intelligible.
5076 31. Added a use_postmaster feature to recipient callouts.
5078 32. Added the $body_zerocount variable, containing the number of binary zero
5079 bytes in the message body.
5081 33. The time of last modification of the "new" subdirectory is now used as the
5082 "mailbox time last read" when there is a quota error for a maildir
5085 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5087 35. Added +ignore_unknown as a special item in host lists.
5089 36. Code for decoding IPv6 addresses in host lists is now included, even if
5090 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5091 address was recognized as an IP address, but was then not correctly decoded
5092 into binary, causing unexpected and incorrect effects when compared with
5099 1. Very minor rewording of debugging text in manualroute to say "list of
5100 hosts" instead of "hostlist".
5102 2. If verify=header_syntax was set, and a header line with an unqualified
5103 address (no domain) and a large number of spaces between the end of the
5104 name and the colon was received, the reception process suffered a buffer
5105 overflow, and (when I tested it) crashed. This was caused by some obsolete
5106 code that should have been removed. The fix is to remove it!
5108 3. When running in the test harness, delay a bit after writing a bounce
5109 message to get a bit more predictability in the log output.
5111 4. Added a call to search_tidyup() just before forking a reception process. In
5112 theory, someone could use a lookup in the expansion of smtp_accept_max_
5113 per_host which, without the tidyup, could leave open a database connection.
5115 5. Added the variables $recipient_data and $sender_data which get set from a
5116 lookup success in an ACL "recipients" or "senders" condition, or a router
5117 "senders" option, similar to $domain_data and $local_part_data.
5119 6. Moved the writing of debug_print from before to after the "senders" test
5122 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5123 problems for message scanning, either using a data ACL, or using
5124 local_scan() because the Received: header was not generated till after they
5125 were called (in order to set the time as the time of reception completion).
5126 I have revised the way this works. The header is now generated after the
5127 body is received, but before the ACL or local_scan() are called. After they
5128 are run, the timestamp in the header is updated.
5134 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5135 before starting a queue runner without re-exec. This happened only when
5136 deliver_drop_privilege was set or when the Exim user was set to root. The
5137 effect of the bug was that timeouts during subsequent deliveries caused
5138 crashes instead of being properly handled. The handler is now left at its
5139 default (and expected) setting.
5141 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5142 message, again when deliver_drop_privilege is set or Exim is run as root.
5143 The bug described in (1) was not present in this case, but the tidying up
5144 of the other signals was missing. I have made the two cases consistent.
5146 3. The ignore_target_hosts setting on a manualroute router was being ignored
5147 for hosts that were looked up using the /MX notation.
5149 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5152 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5153 operated on the sender address. After changing the $sender_address to <>
5154 for the sender address verify, Exim was re-instated it as the original
5155 (before rewriting) address, but remembering that it had rewritten it, so it
5156 wasn't rewriting it again. This bug also had the effect of breaking the
5157 sender address verification caching when the sender address was rewritten.
5159 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5160 This has been changed so that if the ip literal address matches
5161 ignore_target_hosts, the router declines.
5163 7. Added expansion conditions match_domain, match_address, and match_local_
5164 part (NOT match_host).
5166 8. The placeholder for the Received: header didn't have a length field set.
5168 9. Added code to Exim itself and to exim_lock to test for a specific race
5169 condition that could lead to file corruption when using MBX delivery. The
5170 issue is with the lockfile that is created in /tmp. If this file is removed
5171 after a process has opened it but before that process has acquired a lock,
5172 there is the potential for a second process to recreate the file and also
5173 acquire a lock. This could lead to two Exim processes writing to the file
5174 at the same time. The added code performs the same test as UW imapd; it
5175 checks after acquiring the lock that its file descriptor still refers to
5176 the same named file.
5178 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5179 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5182 11. Added the smtp_active_hostname option. If used, this will typically be made
5183 to depend on the incoming interface address. Because $interface_address is
5184 not set up until the daemon has forked a reception process, error responses
5185 that can happen earlier (such as "too many connections") no longer contain
5188 12. If an expansion in a condition on a "warn" statement fails because a lookup
5189 defers, the "warn" statement is abandoned, and the next ACL statement is
5190 processed. Previously this caused the whole ACL to be aborted.
5192 13. Added the iplsearch lookup type.
5194 14. Added ident_timeout as a log selector.
5196 15. Added tls_certificate_verified as a log selector.
5198 16. Added a global option tls_require_ciphers (compare the smtp transport
5199 option of the same name). This controls incoming TLS connections.
5201 17. I finally figured out how to make tls_require_ciphers do a similar thing
5202 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5203 before starting the TLS session.
5205 18. Tabs are now shown as \t in -bP output.
5207 19. If the log selector return_path_on_delivery was set, Exim crashed when
5208 bouncing a message because it had too many Received: header lines.
5210 20. If two routers both had headers_remove settings, and the first one included
5211 a superfluous trailing colon, the final name in the first list and the
5212 first name in the second list were incorrectly joined into one item (with a
5213 colon in the middle).
5219 1. Added -C and -D options to the exinext utility, mainly to make it easier
5220 to include in the automated testing, but these could be helpful when
5221 multiple configurations are in use.
5223 2. The exinext utility was not formatting the output nicely when there was
5224 an alternate port involved in the retry record key, nor when there was a
5225 message id as well (for retries that were specific to a specific message
5226 and a specific host). It was also confused by IPv6 addresses, because of
5227 the additional colons they contain. I have fixed the IPv4 problem, and
5228 patched it up to do a reasonable job for IPv6.
5230 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5231 delivery, the log line now contains "pipelined" if PIPELINING was used.
5233 4. An SMTP transport process used to panic and die if the bind() call to set
5234 an explicit outgoing interface failed. This has been changed; it is now
5235 treated in the same way as a connect() failure.
5237 5. A reference to $sender_host_name in the part of a conditional expansion
5238 that was being skipped was still causing a DNS lookup. This no longer
5241 6. The def: expansion condition was not recognizing references to header lines
5242 that used bh_ and bheader_.
5244 7. Added the _cache feature to named lists.
5246 8. The code for checking quota_filecount in the appendfile transport was
5247 allowing one more file than it should have been.
5249 9. For compatibility with Sendmail, the command line option
5257 and sets the incoming protocol and host name (for trusted callers). The
5258 host name and its colon can be omitted when only the protocol is to be set.
5259 Note the Exim already has two private options, -pd and -ps, that refer to
5260 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5261 "s", but I don't think that's a major issue.
5263 10. A number of refactoring changes to the code, none of which should affect
5266 (a) The number of logging options was getting close to filling up the
5267 32-bit word that was used as a bit map. I have split them into two classes:
5268 those that are passed in the argument to log_write(), and those that are
5269 only ever tested independently outside of that function. These are now in
5270 separate 32-bit words, so there is plenty of room for expansion again.
5271 There is no change in the user interface or the logging behaviour.
5273 (b) When building, for example, log lines, the code previously used a
5274 macro that called string_cat() twice, in order to add two strings. This is
5275 not really sufficiently general. Furthermore, there was one instance where
5276 it was actually wrong because one of the argument was used twice, and in
5277 one call a function was used. (As it happened, calling the function twice
5278 did not affect the overall behaviour.) The macro has been replaced by a
5279 function that can join an arbitrary number of extra strings onto a growing
5282 (c) The code for expansion conditions now uses a table and a binary chop
5283 instead of a serial search (which was left over from when there were very
5284 few conditions). Also, it now recognizes conditions like "pam" even when
5285 the relevant support is not compiled in: a suitably worded error message is
5286 given if an attempt is made to use such a condition.
5288 11. Added ${time_interval:xxxxx}.
5290 12. A bug was causing one of the ddress fields not to be passed back correctly
5291 from remote delivery subprocesses. The field in question was not being
5292 subsequently used, so this caused to problems in practice.
5294 13. Added new log selectors queue_time and deliver_time.
5296 14. Might have fixed a bug in maildirsizefile handling that threw up
5297 "unexpected character" debug warnings, and recalculated the data
5298 unnecessarily. In any case, I expanded the warning message to give more
5301 15. Added the message "Restricted characters in address" to the statements in
5302 the default ACL that block characters like @ and % in local parts.
5304 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5305 Three changes have been made:
5307 (a) There was a serious bug; a negative response to MAIL caused the whole
5308 recipient domain to be cached as invalid, thereby blocking all messages
5309 to all local parts at the same domain, from all senders. This bug has
5310 been fixed. The domain is no longer cached after a negative response to
5311 MAIL if the sender used is not empty.
5313 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5316 (c) A new callout option, "use_sender" has been added for people who want
5317 the modified behaviour.
5323 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5326 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5327 indeed breaks things for older releases.
5329 3. Added additional logging to the case where there is a problem reading data
5330 from a filter that is running in a subprocess using a pipe, in order to
5331 try to track down a specific problem.
5333 4. Testing facility fudge: when running in the test harness and attempting
5334 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5335 getting "No route to host". Convert this to a timeout.
5337 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5340 6. Some OS don't have socklen_t but use size_t instead. This affects the
5341 fifth argument of getsockopt() amongst other things. This is now
5342 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5343 can be set for individual OS. I have set it for SunOS5, OSF1, and
5344 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5345 some earlier ones do not.
5347 7. Change 4.30/15 was not doing the test caselessly.
5349 8. The standard form for an IPv6 address literal was being rejected by address
5350 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5351 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5352 this, as well as the form without the "IPv6" on the front (but only when
5353 address literals are enabled, of course).
5355 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5357 10. Exim crashed if a message with an empty sender address specified by -f
5358 encountered a router with an errors_to setting. This could be provoked only
5359 by a command such as
5363 where an empty string was supplied; "<>" did not hit this bug.
5365 11. Installed PCRE release 4.5.
5367 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5368 remained set. It is now erased.
5370 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5371 times from message ids (which are base 36 rather than the normal 62).
5373 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5374 were being counted as actual protocol errors, and logged if the log
5375 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5376 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5377 and DATA following a set of rejected RCPTs do not count as protocol errors.
5378 In other words, Exim assumes they were pipelined, though this may not
5379 actually be the case. Of course, in all cases the client gets an
5380 appropriate error code.
5382 15. If a lookup fails in an ACL condition, a message about the failure may
5383 be available; it is used if testing the ACL cannot continue, because most
5384 such messages specify what the cause of the deferral is. However, some
5385 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5386 that caused an old message to be retained and used if a later statement
5387 caused a defer, replacing the real cause of the deferral.
5389 16. If an IP address had so many PTR records that the DNS lookup buffer
5390 was not large enough to hold them, Exim could crash while trying to process
5391 the truncated data. It now detects and logs this case.
5393 17. Further to 4.21/58, another change has been made: if (and only if) the
5394 first line of a message (the first header line) ends with CRLF, a bare LF
5395 in a subsequent header line has a space inserted after it, so as not to
5396 terminate the header.
5398 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5399 unnecessarily, used atoi() instead of strtol(), and didn't check the
5400 termination when getting file sizes from file names by regex.
5402 19. Completely re-implemented the support for maildirsize files, in the light
5403 of a number of problems with the previous contributed implementation
5404 (4.30/29). In particular:
5406 . If the quota is zero, the maildirsize file is maintained, but no quota is
5409 . If the maildir directory does not exist, it is created before any attempt
5410 to write a maildirsize file.
5412 . The quota value in the file is just a cache; if the quota is changed in
5413 the transport, the new value overrides.
5415 . A regular expression is available for excluding directories from the
5418 20. The autoreply transport checks the characters in options that define the
5419 message's headers; it allows continued headers, but it was checking with
5420 isspace() after an embedded newline instead of explicitly looking for a
5423 21. If all the "regular" hosts to which an address was routed had passed their
5424 expiry times, and had not reached their retry times, the address was
5425 bounced, even if fallback hosts were defined. Now Exim should go on to try
5428 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5429 equivalent code in the SMTP transport. Some hosts send humungous responses
5430 to HELO/EHLO, more than 1024 it seems.
5432 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5433 gives compiler warnings in some environments. I've now done it "properly",
5436 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5437 (because of problems with the built-in one) was declared to return uschar *
5438 instead of char *, causing compiler failure.
5440 25. Fixed a file descriptor leak when processing alias/forward files.
5442 26. Fixed a minor format string issue in dbfn.c.
5444 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5446 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5447 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5450 29. When a sender address is verified, it is cached, to save repeating the test
5451 when there is more than one recipient in a message. However, when the
5452 verification involves a callout, it is possible for different callout
5453 options to be set for different recipients. It is too complicated to keep
5454 track of this in the cache, so now Exim always runs a verification when a
5455 callout is required, relying on the callout cache for the optimization.
5456 The overhead is duplication of the address routing, but this should not be
5459 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5460 to be verified with callout=postmaster, and the main callout worked but the
5461 postmaster check failed, the verification correctly failed. However, if a
5462 subsequent RCPT command asked for sender verification *without* the
5463 postmaster check, incorrect caching caused this verification also to fail,
5466 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5467 it was not caching the DNS options (qualify_single, search_parents) that
5468 were used when the lookup failed. A subsequent lookup with different
5469 options therefore always gave the same answer, though there were cases
5470 where it should not have. (Example: a "domains = !$mx_any" option on a
5471 dnslookup router: the "domains" option is always processed without any
5472 widening, but the router might have qualify_single set.) Now Exim uses the
5473 cached value only when the same options are set.
5475 32. Added John Jetmore's "exipick" utility to the distribution.
5477 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5478 than a timeout (e.g. a certificate is required, and is not provided), an
5479 Exim server now closes the connection immediately. Previously it waited for
5480 the client to close - but if the client is SSL, it seems that they each
5481 wait for each other, leading to a delay before one of them times out.
5483 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5484 maintained 0.8.x compatibility because I don't think many are using it, and
5485 it is clearly obsolete.
5487 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5490 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5491 client certificate was expired. A simple patch fixes this, though I don't
5492 understand the full logic of why the verify callback is called multiple
5495 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5496 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5497 which causes problems with some clients (such as the Certicom SSL Plus
5498 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5499 disables the coutermeasure allowing Eudora to connect."
5501 38. Exim was not checking that a write() to a log file succeeded. This could
5502 lead to Bad Things if a log got too big, in particular if it hit a file
5503 size limit. Exim now panics and dies if it cannot write to a log file, just
5504 as it does if it cannot open a log file.
5506 39. Modified OS/Makefile-Linux so that it now contains
5508 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5510 The two -D definitions ensure that Exim is compiled with large file
5511 support, which makes it possible to handle log files that are bigger than
5514 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5515 instance) a domain was checked against a named list that involved a lookup,
5516 causing $domain_data to be set, then another domain was checked against the
5517 same list, then the first domain was re-checked, the value of $domain_data
5518 after the final check could be wrong. In particular, if the second check
5519 failed, it could be set empty. This bug probably also applied to
5522 41. The strip_trailing_dot option was not being applied to the address given
5523 with the -f command-line option.
5525 42. The code for reading a message's header from the spool was incrementing
5526 $received_count, but never initializing it. This meant that the value was
5527 incorrect (doubled) while delivering a message in the same process in which
5528 it was received. In the most common configuration of Exim, this never
5529 happens - a fresh exec is done - but it can happen when
5530 deliver_drop_privilege is set.
5532 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5533 it now includes up to 150 characters of the unexpected data in the log
5536 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5537 and building data strings. The size of both of these buffers was 10 000
5538 bytes - far larger than anybody would *ever* want, thought I. Needless to
5539 say, somebody hit the limit. I have increased the maximum line length to
5540 20 000 and the maximum data length of concatenated lines to 100 000. I have
5541 also fixed two bugs, because there was no checking on these buffers. Tsk,
5542 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5543 buffer is too small.
5545 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5546 lsearch lookups. Now it does.
5548 46. When parsing a route_list item in a manualroute router, a fixed-length
5549 buffer was used for the list of hosts. I made this 1024 bytes long,
5550 thinking that nobody would ever have a list of hosts that long. Wrong.
5551 Somebody had a whole pile of complicated expansion conditions, and the
5552 string was silently truncated, leading to an expansion error. It turns out
5553 that it is easier to change to an unlimited length (owing to other changes
5554 that have happened since this code was originally written) than to build
5555 structure for giving a limitation error. The length of the item that
5556 expands into the list of hosts is now unlimited.
5558 47. The lsearch lookup could not handle data where the length of text line was
5559 more than 4095 characters. Such lines were truncated, leading to shortened
5560 data being returned. It should now handle lines of any length.
5562 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5563 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5566 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5567 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5568 no longer happens in comment lines. A list of replacements is now placed
5569 at the head of all of the source files, except those whose only change is
5570 to replace PERL_COMMAND in the very first #! line.
5572 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5573 messages on the queue, with a bottom-up merge sort, using code contributed
5574 by Michael Haardt. This should make operations like -bp somewhat faster on
5575 large queues. It won't affect queue runners, except when queue_run_in_order
5578 51. Installed eximstats 1.31 in the distribution.
5580 52. Added support for SRV lookups to the dnslookup router.
5582 53. If an ACL referred to $message_body or $message_body_end, the value was not
5583 reset for any messages that followed in the same SMTP session.
5585 54. The store-handling optimization for building very long strings was not
5586 differentiating between the different store pools. I don't think this
5587 actually made any difference in practice, but I've tidied it.
5589 55. While running the routers to verify a sender address, $sender_address
5590 was still set to the sender address. This is wrong, because when routing to
5591 send a bounce to the sender, it would be empty. Therefore, I have changed
5592 it so that, while verifying a sender address, $sender_address is set to <>.
5593 (There is no change to what happens when verifying a recipient address.)
5595 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5596 target A or AAAA records (if not already returned) without resetting the
5597 qualify_single or search_parents options of the DNS resolver. These are
5598 inappropriate in this case because the targets of MX and SRV records must
5599 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5600 target that, when qualified, matched something in the local domain. These
5601 two options are now turned off when doing these lookups.
5603 57. It seems that at least some releases of Reiserfs (which does not have the
5604 concept of a fixed number of inodes) returns zero and not -1 for the
5605 number of available inodes. This interacted badly with check_spool_inodes,
5606 which assumed that -1 was the "no such thing" setting. What I have done is
5607 to check that the total number of inodes is greater than zero before doing
5608 the test of how many are available.
5610 58. When a "warn" ACL statement has a log_message modifier, the message is
5611 remembered, and not repeated. This is to avoid a lot of repetition when a
5612 message has many recipients that cause the same warning to be written.
5613 However, Exim was preserving the list of already written lines for an
5614 entire SMTP session, which doesn't seem right. The memory is now reset if a
5615 new message is started.
5617 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5618 debugging output unless log_rewrite was also set.
5620 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5621 of (int)(handle) when we know that handle contains (void *)(-1).
5623 61. The Exim daemon panic-logs an error return when it closes the incoming
5624 connection. However "connection reset by peer" seems to be common, and
5625 isn't really an error worthy of noting specially, so that particular error
5628 62. When Exim is trying to find all the local interfaces, it used to panic and
5629 die if the ioctl to get the interface flags failed. However, it seems that
5630 on at least one OS (Solaris 9) it is possible to have an interface that is
5631 included in the list of interfaces, but for which you get a failure error
5632 for this call. This happens when the interface is not "plumbed" into a
5633 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5634 failure of the "get flags" call assumes that the interface is down.
5636 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5637 makes life easier for people who are doing arithmetic on fields extracted
5638 from dates, where you often get leading zeros that should not be
5639 interpreted as octal.
5641 64. Added qualify_domain to the redirect router, to override the global
5644 65. If a pathologically long header line contained very many addresses (the
5645 report of this problem mentioned 10 000) and each of them was rewritten,
5646 Exim could use up a very large amount of memory. (It kept on making new
5647 copies of the header line as it rewrote, and never released the old ones.)
5648 At the expense of a bit more processing, the header rewriting function has
5649 been changed so that it no longer eats memory in this way.
5651 66. The generation of the Received: header has been moved from the time that a
5652 message starts to be received, to the time that it finishes. The timestamp
5653 in the Received: header should now be very close to that of the <= log
5654 line. There are two side-effects of this change:
5656 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5657 logged header lines no longer include the local Received: line, because
5658 it has not yet been created. The same applies to a copy of the message
5659 that is returned to a non-SMTP sender when a message is rejected.
5661 (b) When a filter file is tested using -bf, no additional Received: header
5662 is added to the test message. After some thought, I decided that this
5665 This change does not affect the value of $received_for. It is still set
5666 after address rewriting, but before local_scan() is called.
5668 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5670 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5671 gave an unhelpful panic error message, and a defer error. I have managed to
5672 change this behaviour so that it now rejects any supplied certificate,
5673 which seems right, as the list of acceptable certificates is empty.
5675 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5676 gave an unhelpful defer error. I have not managed to make this reject any
5677 supplied certificates, but the error message it gives is "no certificate
5678 supplied", which is not helpful.
5680 70. exigrep's output now also includes lines that are not associated with any
5681 message, but which match the given pattern. Implemented by a patch from
5682 Martin Sluka, which also tidied up the Perl a bit.
5684 71. Recipient callout verification, like sender verification, was using <> in
5685 the MAIL FROM command. This isn't really the right thing, since the actual
5686 sender may affect whether the remote host accepts the recipient or not. I
5687 have changed it to use the actual sender in the callout; this means that
5688 the cache record is now keyed on a recipient/sender pair, not just the
5689 recipient address. There doesn't seem to be a real danger of callout loops,
5690 since a callout by the remote host to check the sender would use <>.
5691 [SEE ABOVE: changed after hitting problems.]
5693 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5694 temporary errors. However, in the case of such a code being given after
5695 the end of a data transmission (i.e. after ".") Exim was failing to write
5696 a retry record for the message. (Yes, there was some broken host that was
5697 actually sending 8xx at this point.)
5699 73. An unknown lookup type in a host list could cause Exim to panic-die when
5700 the list was checked. (An example that provoked this was putting <; in the
5701 middle of a list instead of at the start.) If this happened during a DATA
5702 ACL check, a -D file could be left lying around. This kind of configuration
5703 error no longer causes Exim to die; instead it causes a defer error. The
5704 incident is still logged to the main and panic logs.
5706 74. Buglet left over from Exim 3 conversion. The message "too many messages
5707 in one connection" was written to the rejectlog but not the mainlog, except
5708 when address rewriting (yes!) was being logged.
5710 75. Added write_rejectlog option.
5712 76. When a system filter was run not as root (that is, when system_filter_user
5713 was set), the values of the $n variables were not being returned to the
5714 main process; thus, they were not subsequently available in the $sn
5717 77. Added +return_path_on_delivery log selector.
5719 78. A connection timeout was being treated differently from recipients deferred
5720 when testing hosts_max_try with a message that was older than the host's
5721 retry timeout. (The host should not be counted, thus allowing all hosts to
5722 be tried at least once before bouncing.) This may have been the cause of an
5723 occasionally reported bug whereby a message would remain on the queue
5724 longer than the retry timeout, but would be bounced if a delivery was
5725 forced. I say "may" because I never totally pinned down the problem;
5726 setting up timeout/retry tests is difficult. See also the next item.
5728 79. The ultimate address timeout was not being applied to errors that involved
5729 a combination of host plus message (for example, a timeout on a MAIL
5730 command). When an address resolved to a number of possible hosts, and they
5731 were not all tried for each delivery (e.g. because of hosts_max_try), a
5732 message could remain on the queue longer than the retry timeout.
5734 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5737 81. Fixed an obscure SMTP outgoing bug which required at least the following
5738 conditions: (a) there was another message waiting for the same server;
5739 (b) the server returned 5xx to all RCPT commands in the first message so
5740 that the message was not completed; (c) the server dropped the connection
5741 or gave a negative response to the RSET that Exim sends to abort the
5742 transaction. The observed case was a dropped connection after DATA that had
5743 been sent in pipelining mode. That is, the server had advertised PIPELINING
5744 but was not implementing it correctly. The effect of the bug was incorrect
5745 behaviour, such as trying another host, and this could lead to a crash.
5751 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5752 and daemon.c were passed as pointers to ints; they should have been
5753 pointers to socklen_t variables (which are typically unsigned ints).
5755 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5758 3. Fixed a really odd bug that affected only the testing scheme; patching a
5759 certain fixed string in the binary changed the value of another string that
5760 happened to be identical to the end of the original first string.
5762 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5763 name", it returns that address as the IP address. On some operating
5764 systems (e.g. Solaris), it also passes back the IP address string as the
5765 "host name". However, on others (e.g. Linux), it passes back an empty
5766 string. Exim wasn't checking for this, and was changing the host name to an
5767 empty string, assuming it had been canonicalized.
5769 5. Although rare, it is permitted to have more than one PTR record for a given
5770 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5771 all the names associated with an address, because they do in Solaris.
5772 However, it seems that they do not in Linux for data that comes from the
5773 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5774 I found this out when I moved to a new Linux workstation and tried to run
5775 the Exim test suite.
5777 To get round this problem I have changed the code so that it now does its
5778 own call to the DNS to look up PTR records when searching for a host name.
5779 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5780 addresses that are only in /etc/hosts are still found.
5782 This behaviour is, however, controlled by an option called host_lookup_
5783 order, which defaults to "bydns:byaddr". If people want to use the other
5784 order, or indeed, just use one or the other means of lookup, they can
5785 specify it in this variable.
5787 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5788 some operating systems, this comes back from gethostbyaddr() as an empty
5789 string, and this is what Exim used to test for. However, it seems that in
5790 other systems, "." is yielded. Exim now tests for this case too.
5792 7. The values of check_spool_space and check_log_space are now held internally
5793 as a number of kilobytes instead of an absolute number of bytes. If a
5794 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5795 kilobyte. This means that much larger values can be stored.
5797 8. Exim monitor: an attempt to get the action menu when not actually pointing
5798 at a message produces an empty menu entitled "No message selected". This
5799 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5800 no entries in it ("Shell widget menu has zero width and/or height"). So I
5801 have added a single, blank menu entry in this case.
5803 9. Added ${quote_local_part.
5805 10. MIME decoding is now applied to the contents of Subject: header lines when
5808 11. Now that a reference to $sender_host_address automatically causes a reverse
5809 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5810 host lookup before query-style lookups in lists that might use this
5811 variable. This has therefore been abolished, and the "net-" prefix is no
5812 longer necessary for query-style lookups.
5814 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5815 have been a typo for LFLAGS, so it has been changed.
5817 13. The install script calls Exim with "-C /dev/null" in order to find the
5818 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5819 to be output. However, since Exim outputs its version number before the
5820 error, it didn't break the script. It just looked ugly. I fixed this by
5821 always allowing "-C /dev/null" if the caller is root.
5823 14. Ignore overlarge ACL variable number when reading spool file - insurance
5824 against a later release with more variables having written the file.
5826 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5827 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5828 this, as well as the form without the "IPv6" on the front.
5830 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5831 OS/Makefile-Darwin file.
5833 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5834 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5836 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5837 variable. However, some OS use ints for inodes. I've added cast to long int
5838 to get rid of the compiler warning.
5840 19. I had forgotten to lock out "/../" in configuration file names when
5841 ALT_CONFIG_PREFIX was set.
5843 20. Routers used for verification do not need to specify transports. However,
5844 if such a router generated a host list, and callout was configured, Exim
5845 crashed, because it could not find a port number from the (non-existent)
5846 transport. It now assumes port 25 in this circumstance.
5848 21. Added the -t option to exigrep.
5850 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5851 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5852 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5853 them is set, LOOKUP_LSEARCH is forced.
5855 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5857 24. Added sender and host information to the "rejected by local_scan()" log
5858 line; previously there was no indication of these.
5860 25. Added .include_if_exists.
5862 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5863 Linux. It turns out that not all file systems support this. Apparently some
5864 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5865 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5866 not supported on the file descriptor, is now ignored when Exim is trying to
5867 sync a directory. This applies only to Linux.
5869 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5871 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5872 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5875 29. Added support for maildirsize files from supplied patch (modified a bit).
5877 30. The use of :fail: followed by an empty string could lead Exim to respond to
5878 sender verification failures with (e.g.):
5880 550 Verification failed for <xxx>
5881 550 Sender verify failed
5883 where the first response line was missing the '-' that indicates it is not
5884 the final line of the response.
5886 31. The loop for finding the name of the user that called Exim had a hardwired
5887 limit of 10; it now uses the value of finduser_retries, which is used for
5888 all other user lookups.
5890 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5893 33. Exim was neglecting to zero errno before one call of strtol() when
5894 expanding a string and expecting an integer value. On some systems this
5895 resulted in spurious "integer overflow" errors. Also, it was casting the
5896 result into an int without checking.
5898 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5899 did not work. The code looks as if it has *never* worked, though it appears
5900 to have been documented since at least release 1.62. I have made it work.
5902 35. The "timeout_DNS" error in retry rules, also documented since at least
5903 1.62, also never worked. As it isn't clear exactly what this means, and
5904 clearly it isn't a major issue, I have abolished the feature by treating it
5905 as "timeout", and writing a warning to the main and panic logs.
5907 36. The display of retry rules for -brt wasn't always showing the error code
5910 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5911 timeout_connect_A, timeout_connect_MX.
5913 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5914 to the empty sender.
5916 39. The daemon was not analysing the content of -oX till after it had closed
5917 stderr and disconnected from the controlling terminal. This meant that any
5918 syntax errors were only noted on the panic log, and the return code from
5919 the command was 0. By re-arranging the code a little, I've made the
5920 decoding happen first, so such errors now appear on stderr, and the return
5921 code is 1. However, the actual setting up of the sockets still happens in
5922 the disconnected process, so errors there are still only recorded on the
5925 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5926 connections (as happens on some IP stacks) was logged at start up time as
5927 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5928 it from "IPv6 and IPv4", which means that two separate sockets are being
5931 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5932 says whether AF_INET or AF_INET6 was passed as an argument.
5934 42. Exiwhat output was messed up when time zones were included in log
5937 43. Exiwhat now gives more information about the daemon's listening ports,
5938 and whether -tls-on-connect was used.
5940 44. The "port" option of the smtp transport is now expanded.
5942 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5943 silently ignored. Now an error message is written to the main and panic
5946 46. There's a new ACL modifier called "logwrite" which writes to a log file
5947 as soon as it is encountered.
5949 47. Added $local_user_uid and $local_user_gid at routing time.
5951 48. Exim crashed when trying to verify a sender address that was being
5954 49. Exim was recognizing only a space character after ".include". It now also
5955 recognizes a tab character.
5957 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5958 extracting the relevant information from the specification. The man page no
5959 longer contains scrambled data for the -d option, and I've added a section
5960 at the front about calling Exim under different names.
5962 51. Added "extra_headers" argument to the "mail" command in filter files.
5964 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5967 53. Installed eximstats 1.29.
5969 54. Added transport_filter_timeout as a generic transport option.
5971 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5972 Cc: header lines. This was required by RFC 822, but it not required by RFC
5975 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5976 incoming messages that did not have them. Now it does so only if the
5977 message originates locally, that is, if there is no associated remote host
5978 address. When Resent- header lines are present, this applies to the Resent-
5979 lines rather than the non-Resent- lines.
5981 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5982 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5984 58. Messages for configuration errors now include the name of the main
5985 configuration file - useful now that there may be more than one file in a
5986 list (.included file names were always shown).
5988 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5989 for those rare installations that do not start the daemon as root or run it
5990 setuid root. I've cut out the call to initgroups() if the daemon is not
5993 60. The Exim user and group can now be bound into the binary as text strings
5994 that are looked up at the start of Exim's processing.
5996 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5998 62. Added $mailstore_basename variable.
6000 63. Installed patch to sieve.c from Michael Haardt.
6002 64. When Exim failed to open the panic log after failing to open the main log,
6003 the original message it was trying to log was written to stderr and debug
6004 output, but if they were not available (the usual case in production), it
6005 was lost. Now it is written to syslog before the two lines that record the
6006 failures to open the logs.
6008 65. Users' Exim filters run in subprocesses under the user's uid. It is
6009 possible for a "deliver" command or an alias in a "personal" command to
6010 provoke an address rewrite. If logging of address rewriting is configured,
6011 this fails because the process is not running as root or exim. There may be
6012 a better way of dealing with this, but for the moment (because 4.30 needs
6013 to be released), I have disabled address rewrite logging when running a
6014 filter in a non-root, non-exim process.
6020 1. The buildconfig auxiliary program wasn't quoting the value set for
6021 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6022 not defined. This bug was masked in 4.22 by the effect that was fixed in
6025 2. Some messages that were rejected after a message id was allocated were
6026 shown as "incomplete" by exigrep. It no longer does this for messages that
6027 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6029 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6030 have allow_domain_literals set, the ID did not get logged in the <= line.
6031 Domain literals are now always recognized in Message-ID: header lines.
6033 4. The first argument for a ${extract expansion item is the key name or field
6034 number. Leading and trailing spaces in this item were not being ignored,
6035 causing some misleading effects.
6037 5. When deliver_drop_privilege was set, single queue runner processes started
6038 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6039 same command in the process it spins off) were not dropping privilege.
6041 6. When the daemon running as "exim" started a queue runner, it always
6042 re-executed Exim in the spun-off process. This is a waste of effort when
6043 deliver_drop_privilege is set. The new process now just calls the
6044 queue-runner function directly.
6050 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6053 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6054 ignored. Though the use of -oP was forcing the writing of a pid file, it
6055 was always written to the default place.
6057 3. If the message "no IP address found for host xxxx" is generated during
6058 incoming verification, it is now followed by identification of the incoming
6059 connection (so you can more easily find what provoked it).
6061 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6063 5. Added some features to "harden" Exim a bit more against certain attacks:
6065 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6066 be put in Local/Makefile. This is like the never_users runtime option,
6067 but it cannot be overridden. The default setting is "root".
6069 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6070 prefix string with which any file named in a -C command line option
6073 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6074 is retained for -C and -D only if the caller of Exim is root. Without
6075 it, the exim user may also use -C and -D and retain privilege.
6077 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6078 command line option is disabled.
6080 6. Macro names set by the -D option must start with an upper case letter, just
6081 like macro names defined in the configuration file.
6083 7. Added "dereference=" facility to LDAP.
6085 8. Two instances of the typo "uknown" in the source files are fixed.
6087 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6088 the Configure-Makefile script screwed up while processing it.
6090 10. Incorporated PCRE 4.4.
6092 11. The SMTP synchronization check was not operating right at the start of an
6093 SMTP session. For example, it could not catch a HELO sent before the client
6094 waited for the greeting. There is now a check for outstanding input at the
6095 point when the greeting is written. Because of the duplex, asynchronous
6096 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6097 way, but not yet received, when the check is performed.
6099 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6100 on TCP/IP sockets, because this apparently causes some broken clients to
6103 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6104 unchanged) from the Cygwin maintainer.
6106 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6107 was supported instead of testing for mbx. Effectively a typo.
6109 15. The spa authenticator server code was not checking that the input it
6110 received was valid base64.
6112 16. The debug output line for the "set" modifier in ACLs was not showing the
6113 name of the variable that was being set.
6115 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6117 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6118 lookup on its own. Something else was needed to trigger the lookup. For
6119 example, a match in host_lookup or the need for a host name in a host list.
6120 Now, if $sender_host_name is referenced and the host name has not yet been
6121 looked up, a lookup is performed. If the lookup fails, the variable remains
6122 empty, and $host_lookup_failed is set to "1".
6124 19. Added "eqi" as a case-independent comparison operator.
6126 20. The saslauthd authentication condition could segfault if neither service
6127 nor realm was specified.
6129 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6130 error message that was logged was misleading, and incoming SMTP
6131 connections were dropped. The message is now more accurate, and temporary
6132 errors are given to SMTP connections.
6134 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6135 (except RSET) with a 421 error, until QUIT is received. However, it was
6136 failing to send a response to QUIT.
6138 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6139 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6140 ACL is now run after the helo_try_verify_hosts code.
6142 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6143 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6144 case-independent, so other case variants are also recognized). Apparently
6145 some systems use these upper case variants.
6147 25. If more than two messages were waiting for the same host, and a transport
6148 filter was specified for the transport, Exim sent two messages over the
6149 same TCP/IP connection, and then failed with "socket operation on non-
6150 socket" when it tried to send the third.
6152 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6154 27. The extern definition of crypt16() in expand.c was not being excluded when
6155 the OS had its own crypt16() function.
6157 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6158 as a preferred synonym for return_size_limit, both as an option and as an
6161 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6163 30. Changed the default configuration ACL to relax the local part checking rule
6164 for addresses that are not in any local domains. For these addresses,
6165 slashes and pipe symbols are allowed within local parts, but the sequence
6166 /../ is explicitly forbidden.
6168 31. SPA server authentication was not clearing the challenge buffer before
6171 32. log_message in a "warn" ACL statement was writing to the reject log as
6172 well as to the main log, which contradicts the documentation and doesn't
6173 seem right (because no rejection is happening). So I have stopped it.
6175 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6176 However, I am unable to do any testing of this.
6178 34. Fixed an infelicity in the appendfile transport. When checking directories
6179 for a mailbox, to see if any needed to be created, it was accidentally
6180 using path names with one or more superfluous leading slashes; tracing
6181 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6183 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6184 contents are added to the log line that is written for every discarded
6185 recipient. (Previously a log_message setting was ignored.)
6187 36. The ${quote: operator now quotes the string if it is empty.
6189 37. The install script runs exim in order to find its version number. If for
6190 some reason other than non-existence or emptiness, which it checks, it
6191 could not run './exim', it was installing it with an empty version number,
6192 i.e. as "exim-". This error state is now caught, and the installation is
6195 38. An argument was missing from the function that creates an error message
6196 when Exim fails to connect to the socket for saslauthd authentication.
6197 This could cause Exim to crash, or give a corrupted message.
6199 39. Added isip, isip4, and isip6 to ${if conditions.
6201 40. The ACL variables $acl_xx are now saved with the message, and can be
6202 accessed later in routers, transports, and filters.
6204 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6205 strings in the file are not string-expanded.
6207 42. If a MAIL command specified a SIZE value that was too large to fit into an
6208 int variable, the check against message_size_limit failed. Such values are
6209 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6210 day this will have to be increased, but I don't think I want to be around
6211 when emails are that large.
6218 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6219 iconv() is not standard in FreeBSD.
6221 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6222 IPv6 enabled. The observed symptom was a segmentation fault on return from
6223 the function os_common_find_running_interfaces() in src/os.c.
6225 3. In the check_special_case() function in daemon.c I had used "errno" as an
6226 argument name, which causes warnings on some systems. This was basically a
6227 typo, since it was named "eno" in the comments!
6229 4. The code that waits for the clock to tick (at a resolution of some fraction
6230 of a second) so as to ensure message-id uniqueness was always waiting for
6231 at least one whole tick, when it could have waited for less. [This is
6232 almost certainly not relevant at current processor speeds, where it is
6233 unlikely to ever wait at all. But we try to future-proof.]
6235 5. The function that sleeps for a time interval that includes fractions of a
6236 second contained a race. It did not block SIGALRM between setting the
6237 timer, and suspending (a couple of lines later). If the interval was short
6238 and the sigsuspend() was delayed until after it had expired, the suspension
6239 never ended. On busy systems this could lead to processes getting stuck for
6242 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6243 process, before it forks any delivery processes. The open lookup caching
6244 mechanism meant that the open file or database connection was passed into
6245 the delivery process. The problem was that delivery processes always tidy
6246 up cached lookup data. This could cause a problem for the next delivery
6247 process started by the queue runner, because the external queue runner
6248 process does not know about the closure. So the next delivery process
6249 still has data in the lookup cache. In the case of a file lookup, there was
6250 no problem because closing a file descriptor in a subprocess doesn't affect
6251 the parent. However, if the lookup was caching a connection to a database,
6252 the connection was closed, and the second delivery process was likely to
6253 see errors such as "PGSQL: query failed: server closed the connection
6254 unexpectedly". The problem has been fixed by closing all cached lookups
6255 in a queue runner before running a delivery process.
6257 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6258 seem to have the "const" qualifier which it has on other OS. I've
6261 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6262 *of the same type* (client or server) with the same public name that an
6263 error should be diagnosed.
6265 9. When Exim looked up a host name for an IP address, but failed to find the
6266 original IP address when looking up the host name (a safety check), it
6267 output the message "<ip address> does not match any IP for NULL", which was
6268 confusing, to say the least. The bug was that the host name should have
6269 appeared instead of "NULL".
6271 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6272 user that is built into the binary, and the -C or -D options is used, root
6273 privilege is dropped before the configuration file is read. In addition,
6274 logging is switched to stderr instead of the normal log files. If the
6275 configuration then re-defines the Exim user, the unprivileged environment
6276 is probably not what is expected, so Exim logs a panic warning message (but
6279 However, if deliver_drop_privilege is set, the unprivileged state may well
6280 be exactly what is intended, so the warning has been cut out in that case,
6281 and Exim is allowed to try to write to its normal log files.
6287 1. smtp_return_error_details was not giving details for temporary sender
6288 or receiver verification errors.
6290 2. Diagnose a configuration error if two authenticators have the same public
6293 3. Exim used not to create the message log file for a message until the first
6294 delivery attempt. This could be confusing when incoming messages were held
6295 for policy or load reasons. The message log file is now created at the time
6296 the message is received, and an initial "Received" line is written to it.
6298 4. The automatically generated man page for command line options had a minor
6299 bug that caused no ill effects; however, a more serious problem was that
6300 the procedure for building the man page automatically didn't always
6301 operate. Consequently, release 4.20 contains an out-of-date version. This
6302 shouldn't happen again.
6304 5. When building Exim with embedded Perl support, the script that builds the
6305 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6306 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6308 6. The freeze_tell option was not being used for messages that were frozen on
6309 arrival, either by an ACL or by local_scan().
6311 7. Added the smtp_incomplete_transaction log selector.
6313 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6314 was accepting AUTH without a new EHLO.
6316 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6317 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6320 10. Logging of TCP/IP connections (when configured) now happens in the main
6321 daemon process instead of the child process, so that the TCP/IP connection
6322 count is more accurate (but it can never be perfect).
6324 11. The use of "drop" in a nested ACL was not being handled correctly in the
6325 outer ACL. Now, if condition failure induced by the nested "drop" causes
6326 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6327 or "require"), the connection is dropped.
6329 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6330 that yield "discard" can now be used with an "accept" or a "discard" verb,
6331 but an error is generated for any others (because I can't see a useful way
6332 to define what should happen).
6334 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6335 are now processed in the same way as lines in the Exim configuration file.
6336 In particular, continuation lines are supported.
6338 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6340 15. Added -ti meaning -t -i.
6342 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6343 domains, and warn by logging if others are found.
6345 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6346 returned from GIFCONF when Exim is trying to find the list of interfaces on
6347 a host. The code in os.c has been modified to copy each ifreq to an aligned
6348 structure in all cases.
6350 Also, in some cases, the returned ifreq's were being copied to a 'struct
6351 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6352 means the last couple of bytes of an IPv6 address could be chopped if the
6353 ifreq contained only a normal sockaddr (14 bytes storage).
6355 18. Named domain lists were not supported in the hosts_treat_as_local option.
6356 An entry such as +xxxx was not recognized, and was treated as a literal
6359 19. Ensure that header lines added by a DATA ACL are included in the reject log
6360 if the ACL subsequently rejects the message.
6362 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6363 MD5 (which is deprecated).
6365 21. When testing a filter file using -bf, Exim was writing a message when it
6366 took the sender from a "From " line in the message, but it was not doing so
6367 when it took $return_path from a Return-Path: header line. It now does.
6369 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6370 with a valid header line field name (a series of printing characters
6371 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6373 23. Changed "disc" in the source to "disk" to conform to the documentation and
6374 the book and for uniformity.
6376 24. Ignore Sendmail's -Ooption=value command line item.
6378 25. When execve() failed while trying to run a command in a pipe transport,
6379 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6380 could be confused with a return value of 69 from the command itself. This
6381 has been changed to 127, the value the shell returns if it is asked to run
6382 a non-existent command. The wording for the related log line suggests a
6383 non-existent command as the problem.
6385 26. If received_header_text expands to an empty string, do not add a Received:
6386 header line to the message. (Well, it adds a token one on the spool, but
6387 marks it "old" so that it doesn't get used or transmitted.)
6389 27. Installed eximstats 1.28 (addition of -nt option).
6391 28. There was no check for failure on the call to getsockname() in the daemon
6392 code. This can fail if there is a shortage of resources on the system, with
6393 ENOMEM, for example. A temporary error is now given on failure.
6395 29. Contrary to the C standard, it seems that in some environments, the
6396 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6397 program. Exim now does this explicitly; it affects the formatting of
6398 timestamps using strftime().
6400 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6401 complaints. I've now initialized all the variables, to avoid this.
6403 32. Header lines added by a system filter were not being "seen" during
6404 transport-time rewrites.
6406 33. The info_callback() function passed to OpenSSL is set up with type void
6407 (*)(SSL *, int, int), as described somewhere. However, when calling the
6408 function (actually a macro) that sets it up, the type void(*)() is
6409 expected. I've put in a cast to prevent warnings from picky compilers.
6411 34. If a DNS black list lookup found a CNAME record, but there were no A
6412 records associated with the domain it pointed at, Exim crashed.
6414 35. If a DNS black list lookup returned more than one A record, Exim ignored
6415 all but the first. It now scans all returned addresses if a particular IP
6416 value is being sought. In this situation, the contents of the
6417 $dnslist_value variable are a list of all the addresses, separated by a
6420 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6421 to accept a host name and all its aliases if the forward lookup for any of
6422 them yielded the IP address of the incoming connection. Now it accepts only
6423 those names whose forward lookup yields the correct IP address. Any other
6424 names are discarded. This closes a loophole whereby a rogue DNS
6425 administrator could create reverse DNS records to break through a
6426 wildcarded host restriction in an ACL.
6428 37. If a user filter or a system filter that ran in a subprocess used any of
6429 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6430 the wrong values were passed to the pipe command ($thisaddress had the
6431 value of $0, $0 had the value of $1, etc). This bug was introduced by
6432 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6434 38. Improved the line breaking for long SMTP error messages from ACLs.
6435 Previously, if there was no break point between 40 and 75 characters, Exim
6436 left the rest of the message alone. Two changes have been made: (a) I've
6437 reduced the minimum length to 35 characters; (b) if it can't find a break
6438 point between 35 and 75 characters, it looks ahead and uses the first one
6439 that it finds. This may give the occasional overlong line, but at least the
6440 remaining text gets split now.
6442 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6443 file descriptors might be low, and that setting 1000 would always raise it.
6444 It turns out that in some environments, the limit is already over 1000 and
6445 that lowering it causes trouble. So now Exim takes care not to decrease it.
6447 40. When delivering a message, the value of $return_path is set to $sender_
6448 address at the start of routing (routers may change the value). By an
6449 oversight, this default was not being set up when an address was tested by
6450 -bt or -bv, which affected the outcome if any router or filter referred to
6453 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6454 log only when "message" or "log_message" are set. However, if one of the
6455 conditions was an address verification, or a call to a nested ACL, the
6456 messages generated by the underlying test were being passed through. This
6457 no longer happens. The underlying message is available in $acl_verify_
6458 message for both "message" and "log_message" expansions, so it can be
6459 passed through if needed.
6461 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6462 new expansion $bh_ to give the encoded byte string without charset
6463 translation. Translation happens only if iconv() is available; HAVE_ICONV
6464 indicates this at build time. HEADERS_CHARSET gives the charset to
6465 translate to; headers_charset can change it in the configuration, and
6466 "headers charset" can change it in an individual filter file.
6468 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6469 that creates RFC 2047 encoded "words" labels them as that charset instead
6470 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6471 expansion operator; (ii) when Exim creates a From: line for a local
6472 message; (iii) when a header line is rewritten to include a "phrase" part.
6474 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6475 buggy, causing it to skip the first lines of messages whose message ID
6476 ended in 'D'. This would not have bitten before Exim release 4.14, because
6477 message IDs were unlikely to end in 'D' before then. The effect was to have
6478 incorrect size information for certain domains.
6480 45. #include "config.h" was missing at the start of the crypt16.c module. This
6481 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6484 46. If there was a timeout during a "random" callout check, Exim treated it as
6485 a failure of the random address, and carried on sending RSET and the real
6486 address. If the delay was just some slowness somewhere, the response to the
6487 original RCPT would be taken as a response to RSET and so on, causing
6488 mayhem of various kinds.
6490 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6491 when I implemented it. It didn't allow for the fact that some option values
6492 may legitimately be negative (e.g. size_addition), and it didn't even do
6493 the right test for positive values.
6495 48. Domain names in DNS records are case-independent. Exim always looks them up
6496 in lower case. Some resolvers return domain names in exactly the case they
6497 appear in the zone file, that is, they may contain uppercase letters. Not
6498 all resolvers do this - some return always lower case. Exim was treating a
6499 change of case by a resolver as a change of domain, similar to a widening
6500 of a domain abbreviation. This triggered its re-routing code and so it was
6501 trying to route what was effectively the same domain again. This normally
6502 caused routing to fail (because the router wouldn't handle the domain
6503 twice). Now Exim checks for this case specially, and just changes the
6504 casing of the domain that it ultimately uses when it transmits the message
6507 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6510 50. If a filter generated a file delivery with a non-absolute name (possible if
6511 no home directory exists for the router), the forbid_file option was not
6514 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6515 the existing equality matching.
6517 52. Exim was using ints instead of ino_t variables in some places where it was
6518 dealing with inode numbers.
6520 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6521 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6522 called TMPDIR, and if it finds it is different, it changes its value.
6524 54. The smtp_printf() function is now made available to local_scan() so
6525 additional output lines can be written before returning. There is also an
6526 smtp_fflush() function to enable the detection of a dropped connection.
6527 The variables smtp_input and smtp_batched_input are exported to
6530 55. Changed the default runtime configuration: the message "Unknown user"
6531 has been removed from the ACL, and instead placed on the localuser router,
6532 using the cannot_route_message feature. This means that any verification
6533 failures that generate their own messages won't get overridden. Similarly,
6534 the "Unrouteable address" message that was in the ACL for unverifiable
6535 relay addresses has also been removed.
6537 56. Added hosts_avoid_esmtp to the smtp transport.
6539 57. The exicyclog script was not checking for the esoteric option
6540 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6541 will work only if exicyclog is run under the appropriate euid.
6543 58. Following a discussion on the list, the rules by which Exim recognises line
6544 endings on incoming messages have been changed. The -dropcr and drop_cr
6545 options are now no-ops, retained only for backwards compatibility. The
6546 following line terminators are recognized: LF CRLF CR. However, special
6547 processing applies to CR:
6549 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6550 nor a local message in the state where . is a terminator.
6552 (ii) If a bare CR is encountered in a header line, an extra space is added
6553 after the line terminator so as not to end the header. The reasoning
6554 behind this is that bare CRs in header lines are most likely either
6555 to be mistakes, or people trying to play silly games.
6557 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6558 was being incorrectly given as 18 bytes larger than it should have been.
6559 This is a VOB (very old bug).
6561 60. This may never have affected anything current, but just in case it has:
6562 When the local host is found other than at the start of a list of hosts,
6563 the local host, those with the same MX, and any that follow, are discarded.
6564 When the list in question was part of a longer list of hosts, the following
6565 hosts (not currently being processed) were also being discarded. This no
6566 longer happens. I'm not sure if this situation could ever has previously
6569 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6572 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6573 header. This is something that is recommended in a new Internet Draft, and
6574 is something that is documented as being done by Sendmail. There are two
6575 possible values. For messages generated by the autoreply transport, Exim
6578 Auto-Submitted: auto-replied
6580 whereas for all other generated messages (e.g. bounces) it adds
6582 Auto-Submitted: auto-generated
6584 63. The "personal" condition in filters now includes a test for the
6585 Auto-Submitted: header. If it contains the string "auto-" the message it
6586 not considered personal.
6588 64. Added rcpt_include_affixes as a generic transport option.
6590 65. Added queue_only_override (default true).
6592 66. Added the syslog_duplication option.
6594 67. If what should have been the first header line of a message consisted of
6595 a space followed by a colon, Exim was mis-interpreting it as a header line.
6596 It isn't of course - it is syntactically invalid and should therefore be
6597 treated as the start of the message body. The misbehaviour could have
6598 caused a number of strange effects, including loss of data in subsequent
6599 header lines, and spool format errors.
6601 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6602 client host had authenticated. This control can now be exercised by an ACL
6603 for more flexibility.
6605 69. By default, callouts do not happen when testing with -bh. There is now a
6606 variant, -bhc, which does actually run the callout code, including
6607 consulting and updating the callout cache.
6609 70. Added support for saslauthd authentication, courtesy of Alexander
6612 71. If statvfs() failed on the spool or log directories while checking their
6613 size for availability, Exim confusingly gave the error "space shortage".
6614 Furthermore, in debugging mode it crashed with a floating point exception.
6615 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6616 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6617 serious problem, Exim now writes to the main and panic logs when this
6618 happens, with details of the failure. It then refuses to accept the
6619 incoming message, giving the message "spool directory problem" or "log
6620 directory problem" with a 421 code for SMTP messages.
6622 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6623 0, 1, and 2 exist, because some OS complain for execs without them (see
6624 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6625 descriptors. However, the code omitted to check that the open succeeded,
6626 causing mysterious errors if for some reason the permissions on /dev/null
6627 got screwed. Now Exim writes a message to the main and panic logs, and
6628 bombs out if it can't open /dev/null.
6630 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6631 interact so that it is all more flexible. It is supposed to remain
6632 backwards compatible. Also added extra_local_interfaces.
6634 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6635 to bomb out with an assertion failure - to the client this appears as a
6636 connection drop. This problem occurs in the part of the code that was taken
6637 from the Samba project. Fortunately, the assertion is in a very simple
6638 function, so I have fixed this by reproducing the function inline in the
6639 one place where it is called, and arranging for authentication to fail
6640 instead of killing the process with assert().
6642 75. The SPA client code was not working when the server requested OEM rather
6643 than Unicode encoding.
6645 76. Added code to make require_files with a specific uid setting more usable in
6646 the case where statting the file as root fails - usually a non-root-mounted
6647 NFS file system. When this happens and the failure is EACCES, Exim now
6648 forks a subprocess and does the per-uid checking as the relevant uid.
6650 77. Added process_log_path.
6652 78. If log_file_path was not explicitly set, a setting of check_log_space or
6653 check_log_inodes was ignored.
6655 79. If a space check for the spool or log partitions fails, the incident is now
6656 logged. Of course, in the latter case the data may get lost...
6658 80. Added the %p formatting code to string_format() so that it can be used to
6659 print addresses in debug_print(). Adjusted all the address printing in the
6660 debugging in store.c to use %p rather than %d.
6662 81. There was a concern that a line of code in smtp_in.c could overflow a
6663 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6664 initially expressed, the concern was not well-founded, because trailing
6665 spaces are removed early. However, if the trailing spaces were followed by
6666 a NULL, they did not get removed, so the overflow was possible. Two fixes
6669 (a) I re-wrote the offending code in a cleaner fashion.
6670 (b) If an incoming SMTP command contains a NULL character, it is rejected
6673 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6674 runs initgroups(), so that if the Exim user is in any additional groups,
6675 they will be used during message reception.
6681 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob