1 Change log file for Exim from version 4.21
2 -------------------------------------------
6 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
7 supports it and a size is available (ie. the sending peer gave us one).
9 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
10 years of being deprecated). The replacements are the ACLs
11 acl_smtp_mime and acl_not_smtp_mime.
13 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
14 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
15 or even an in-clear connection were permitted. Now, if the host lookup
16 was dnssec and dane was requested then the host is only used if the
17 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
18 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
19 if one fails this test.
20 This means that a poorly-configured remote DNS will make it incommunicado;
21 but it protects against a DNS-interception attack on it.
23 JH/04 Bug 1810: make continued-use of an open smtp transport connection
24 non-noisy when a race steals the message being considered.
26 JH/05 If main configuration option tls_certificate is unset, generate a
27 selfsigned certificate for inbound TLS connections.
29 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
30 in rewrites and routers.
32 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
33 and logged a warning sing 4.83; now they are a configuration file error.
35 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
36 (lacking @domain). Apply the same qualification processing as RCPT.
38 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
40 JH/10 Support ${sha256:} applied to a string (as well as the previous
43 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
44 a cutthrough deliver is pending, as we always want to make a connection.
45 This also avoids re-routing the message when later placing the cutthrough
46 connection after a verify cache hit.
47 Do not update it with the verify result either.
49 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
50 when routing results in more than one destination address.
52 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
53 signing (which inhibits the cutthrough capability). Previously only
54 the presence of an option was tested; now an expansion evaluating as
55 empty is permissible (obviously it should depend only on data available
56 when the cutthrough connection is made).
58 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
59 the relevant preceding SMTP command did not note the pipelining mode.
61 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
62 Previously they were not counted.
64 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
65 as one having no matching records. Previously we deferred the message
66 that needed the lookup.
68 JH/17 Fakereject: previously logged as a norml message arrival "<="; now
69 distinguished as "(=".
71 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
72 for missing MX records. Previously it only worked for missing A records.
74 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
76 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
77 after the data-go-ahead and data-ack. Patch from Jason Betts.
79 JH/21 Bug 1846: Send DMARC forensic reports for reject and quaratine results,
80 even for a "none" policy. Patch from Tony Meyer.
82 JH/22 Fix continued use of a connection for further deliveries. If a port was
83 specified by a router, it must also match for the delivery to be
86 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
87 When one of the recipients of a message was unsuitable for the connection
88 (has no matching addresses), we lost track of needing to mark it
89 deferred. As a result mail would be lost.
91 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
93 JH/25 Decoding ACL controls is now done using a binary search; the sourcecode
94 takes up less space and should be simpler to maintain. Merge the ACL
95 condition decode tables also, with similar effect.
100 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
101 and 3.4.4 - once the server is enabled to respond to an OCSP request
102 it does even when not requested, resulting in a stapling non-aware
103 client dropping the TLS connection.
105 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
106 support variable-length bit vectors. No functional change.
108 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
109 The I= interface field on outgoing lines is now after the H= remote
110 host field, same as incoming lines. There is a separate
111 outgoing_interface log selector which allows you to disable the
114 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
115 If not running log_selector +smtp_connection the mainlog would be held
116 open indefinitely after a "too many connections" event, including to a
117 deleted file after a log rotate. Leave the per net connection logging
118 leaving it open for efficiency as that will be quickly detected by the
119 check on the next write.
121 HS/01 Bug 1671: Fix post transport crash.
122 Processing the wait-<transport> messages could crash the delivery
123 process if the message IDs didn't exist for some reason. When
124 using 'split_spool_directory=yes' the construction of the spool
125 file name failed already, exposing the same netto behaviour.
127 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
128 mime_regex ACL conditions.
130 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
131 to DSN fail messages (bounces): remote IP, remote greeting, remote response
132 to HELO, local diagnostic string.
134 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
135 log line to debug. Even when configured with a tls authenticator many
136 client connections are expected to not authenticate in this way, so
137 an authenticate fail is not an error.
139 HS/02 Add the Exim version string to the process info. This way exiwhat
140 gives some more detail about the running daemon.
142 JH/06 Bug 1395: time-limit cacheing of DNS lookups, to the TTL value. This may
143 matter for fast-change records such as DNSBLs.
145 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
146 retry record, even if constant. There may be multiple transports with
147 different interface settings and the retry behaviour needs to be kept
150 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
152 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
154 JH/10 Bug 840: fix log_defer_output option of pipe transport
156 JH/11 Bug 830: use same host for all RCPTS of a message, even under
157 hosts_randomize. This matters a lot when combined with mua_wrapper.
159 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
160 ${quote_pgsql:<string>} operator.
162 JH/13 Bug 1708: avoid misaligned access in cached lookup.
164 JH/14 Change header file name for freeradius-client. Relevant if compiling
165 with Radius support; from the Gentoo tree and checked under Fedora.
167 JH/15 Bug 1712: Introduce $prdr_requested flag variable
169 JH/16 Bug 1714: Permit an empty string as expansion result for transport
170 option transport_filter, meaning no filtering.
172 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
174 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
175 defaults to "*" (all hosts). The variable is now available when not built
176 with TLS, default unset, mainly to enable keeping the testuite sane.
177 If a server certificate is not supplied (via tls_certificate) an error is
178 logged, and clients will find TLS connections fail on startup. Presumably
179 they will retry in-clear.
180 Packagers of Exim are strongly encouraged to create a server certificate
181 at installation time.
183 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
184 with the $config_file variable.
186 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
187 in transport context, after the attempt, and per-recipient. The latter type
188 is per host attempted. The event data is the error message, and the errno
189 information encodes the lookup type (A vs. MX) used for the (first) host,
190 and the trailing two digits of the smtp 4xx reponse.
192 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
193 to write to mainlog (or rejectlog, paniclog) in the window between file
194 creation and permissions/ownership being changed. Particularly affects
195 installations where exicyclog is run as root, rather than exim user;
196 result is that the running daemon panics and dies.
198 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
200 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
201 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
202 "pri" and "weight". Note that the previous implicit priority given by the
203 list order is no longer honoured.
205 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalisation
208 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
209 by defining SUPPORT_SOCKS.
211 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
212 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
213 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
214 variables are renamed to proxy_{local,external}_{address,port}.
216 JH/27 Move Internationalisation support from Experimental to mainline, enabled
217 for a build by defining SUPPORT_I18N
219 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
220 of the query string, and make ${quote_redis:} do that quoting.
222 JH/29 Move Events support from Experimental to mainline, enabled by default
223 and removable for a build by defining DISABLE_EVENT.
225 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
227 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
228 cached by the daemon.
230 JH/32 Move Redis support from Experimental to mainline, enabled for a build
231 by defining LOOKUP_REDIS. The libhiredis library is required.
233 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
234 keys are given for lookup.
236 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
237 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
238 only supported when built with TLS support. The PolarSSL SHA routines
239 are still used when the TLS library is too old for convenient support.
241 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
242 openssl_options), for security. OpenSSL forces this from version 1.1.0
243 server-side so match that on older versions.
245 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
246 allocation for $value could be released as the expansion processing
247 concluded, but leaving the global pointer active for it.
249 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
250 and to use the domains and local_parts ACL conditions.
252 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
253 incorrectly not doubled on cutthrough transmission, hence seen as a
254 body-termination at the receiving system - resulting in truncated mails.
255 Commonly the sender saw a TCP-level error, and retransmitted the message
256 via the normal store-and-forward channel. This could result in duplicates
257 received - but deduplicating mailstores were liable to retain only the
258 initial truncated version.
260 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
262 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
264 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
265 we're in there, support oversigning also; bug 1309.
267 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
269 HS/04 Add support for keep_environment and add_environment options.
271 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
272 either intentional arithmetic overflow during PRNG, or testing config-
275 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
276 delivery resulted in actual delivery. Cancel cutthrough before DATA
279 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
280 rejects a recipient: pass the reject to the originator.
282 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
283 Many were false-positives and ignorable, but it's worth fixing the
286 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
287 for the new environment-manipulation done at startup. Move the routines
288 from being local to tls.c to being global via the os.c file.
290 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
291 an extract embedded as result-arg for a map, the first arg for extract
292 is unavailable so we cannot tell if this is a numbered or keyed
293 extraction. Accept either.
299 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
302 JH/02 The smtp transport option "multi_domain" is now expanded.
304 JH/03 The smtp transport now requests PRDR by default, if the server offers
307 JH/04 Certificate name checking on server certificates, when exim is a client,
308 is now done by default. The transport option tls_verify_cert_hostnames
309 can be used to disable this per-host. The build option
310 EXPERIMENTAL_CERTNAMES is withdrawn.
312 JH/05 The value of the tls_verify_certificates smtp transport and main options
313 default to the word "system" to access the system default CA bundle.
314 For GnuTLS, only version 3.0.20 or later.
316 JH/06 Verification of the server certificate for a TLS connection is now tried
317 (but not required) by default. The verification status is now logged by
318 default, for both outbound TLS and client-certificate supplying inbound
321 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
324 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
325 Status Notification (bounce) messages are now MIME format per RFC 3464.
326 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
327 under the control of the dsn_advertise_hosts option, and routers may
328 have a dsn_lasthop option.
330 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
331 default, modifiable by a malware= option. The list separator for
332 the options can now be changed in the usual way. Bug 68.
334 JH/10 The smtp_receive_timeout main option is now expanded before use.
336 JH/11 The incoming_interface log option now also enables logging of the
337 local interface on delivery outgoing connections.
339 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
340 if the interface and destination host and port all match.
342 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
345 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
346 Patch from Andrew Lewis.
348 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
349 now supports optional time-restrictions, weighting, and priority
350 modifiers per server. Patch originally by <rommer@active.by>.
352 JH/16 The spamd_address main option now supports a mixed list of local
353 and remote servers. Remote servers can be IPv6 addresses, and
354 specify a port-range.
356 JH/17 Bug 68: The spamd_address main option now supports an optional
357 timeout value per server.
359 JH/18 Bug 1581: Router and transport options headers_add/remove can
360 now have the list separator specified.
362 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
365 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
368 JH/21 Support for the A6 type of dns record is withdrawn.
370 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
371 rather than the verbs used.
373 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
374 from 255 to 1024 chars.
376 JH/24 Verification callouts now attempt to use TLS by default.
378 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
379 are generic router options now. The defaults didn't change.
381 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
382 Original patch from Alexander Shikoff, worked over by JH.
384 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
385 files if ZCAT_COMMAND is not executable.
387 JH/26 Bug 1539: Add timout/retry options on dnsdb lookups.
389 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
391 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
392 Normally benign, it bites when the pair was led to by a CNAME;
393 modern usage is to not canoicalize the domain to a CNAME target
394 (and we were inconsistent anyway for A-only vs AAAA+A).
396 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
398 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
399 when evaluating $sender_host_dnssec.
401 JH/31 Check the HELO verification lookup for DNSSEC, adding new
402 $sender_helo_dnssec variable.
404 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
406 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
408 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
410 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
411 documented as working, but never had. Support all but $spam_report.
413 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
414 added for tls authenticator.
416 HS/03 Add perl_taintmode main config option
421 TL/01 When running the test suite, the README says that variables such as
422 no_msglog_check are global and can be placed anywhere in a specific
423 test's script, however it was observed that placement needed to be near
424 the beginning for it to behave that way. Changed the runtest perl
425 script to read through the entire script once to detect and set these
426 variables, reset to the beginning of the script, and then run through
427 the script parsing/test process like normal.
429 TL/02 The BSD's have an arc4random API. One of the functions to induce
430 adding randomness was arc4random_stir(), but it has been removed in
431 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
432 function when detected.
434 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
435 cause callback expansion.
437 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
438 syntax errors in an expansion can be treated as a string instead of
439 logging or causing an error, due to the internal use of bool_lax
440 instead of bool when processing it.
442 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
443 server certificates when making smtp deliveries.
445 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
447 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
449 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
451 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
452 Merged patch from Sebastian Wiedenroth.
454 JH/05 Fix results-pipe from transport process. Several recipients, combined
455 with certificate use, exposed issues where response data items split
456 over buffer boundaries were not parsed properly. This eventually
457 resulted in duplicates being sent. This issue only became common enough
458 to notice due to the introduction of conection certificate information,
459 the item size being so much larger. Found and fixed by Wolfgang Breyha.
461 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
462 size buffer was used, resulting in syntax errors when an expansion
465 JH/07 Add support for directories of certificates when compiled with a GnuTLS
466 version 3.3.6 or later.
468 JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef
469 is EXPERIMENTAL_EVENT, the main-configuration and transport options
470 both become "event_action", the variables become $event_name, $event_data
471 and $event_defer_errno. There is a new variable $verify_mode, usable in
472 routers, transports and related events. The tls:cert event is now also
473 raised for inbound connections, if the main configuration event_action
476 TL/06 In test suite, disable OCSP for old versions of openssl which contained
477 early OCSP support, but no stapling (appears to be less than 1.0.0).
479 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
480 server certificate names available under the smtp transport option
481 "tls_verify_cert_hostname" now do not permit multi-component wildcard
484 JH/10 Time-related extraction expansions from certificates now use the main
485 option "timezone" setting for output formatting, and are consistent
486 between OpenSSL and GnuTLS compilations. Bug 1541.
488 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
489 encoded parameter in the incoming message. Bug 1558.
491 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
492 include certificate info, eximon was claiming there were spoolfile
495 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
497 JH/14 Log delivery-related information more consistently, using the sequence
498 "H=<name> [<ip>]" wherever possible.
500 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
501 are problematic for Debian distribution, omit them from the release
504 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
506 JH/16 Fix string representation of time values on 64bit time_t anchitectures.
509 JH/17 Fix a null-indirection in certextract expansions when a nondefault
510 output list separator was used.
515 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
516 checkers that were complaining about end of non-void function with no
519 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
520 This was a regression intruduced in 4.83 by another bugfix.
522 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
524 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
525 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
531 TF/01 Correctly close the server side of TLS when forking for delivery.
533 When a message was received over SMTP with TLS, Exim failed to clear up
534 the incoming connection properly after forking off the child process to
535 deliver the message. In some situations the subsequent outgoing
536 delivery connection happened to have the same fd number as the incoming
537 connection previously had. Exim would try to use TLS and fail, logging
538 a "Bad file descriptor" error.
540 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
541 utilities have not been installed.
543 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
544 temporary space as the ACL may create new global variables.
546 TL/01 LDAP support uses per connection or global context settings, depending
547 upon the detected version of the libraries at build time.
549 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
550 to extract and use the src ip:port in logging and expansions as if it
551 were a direct connection from the outside internet. PPv2 support was
552 updated based on HAProxy spec change in May 2014.
554 JH/02 Add ${listextract {number}{list}{success}{fail}}.
556 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
557 Properly escape header and check for NULL return.
559 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
562 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
564 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
565 characters in header names, implemented as a verify condition.
566 Contributed by Michael Fischer v. Mollard.
568 TL/05 Rename SPF condition results err_perm and err_temp to standardized
569 results permerror and temperror. Previous values are deprecated but
570 still accepted. In a future release, err_perm and err_temp will be
571 completely removed, which will be a backward incompatibility if the
572 ACL tests for either of these two old results. Patch contributed by
573 user bes-internal on the mailing list.
575 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
577 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
578 selectors, in both main and reject logs.
580 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
583 JH/07 Add malware type "sock" for talking to simple daemon.
585 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
587 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
588 routers/transports under cutthrough routing.
590 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
591 numbers. Touch up "bool" conditional to keep the same definition.
593 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
595 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
597 JH/12 Expand items in router/transport headers_add or headers_remove lists
598 individually rather than the list as a whole. Bug 1452.
600 Required for reasonable handling of multiple headers_ options when
601 they may be empty; requires that headers_remove items with embedded
602 colons must have them doubled (or the list-separator changed).
604 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
605 view the policy declared in the DMARC record. Currently, $dmarc_status
606 is a combined value of both the record presence and the result of the
609 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
611 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
612 dnslookup router and the smtp transport (applying to the forward
615 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
616 of ldap servers used for a specific lookup. Patch provided by Heiko
619 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
620 New variable $lookup_dnssec_authenticated for observability.
622 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
623 Patch submitted by Lars Timman.
625 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
627 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
628 Requires trusted mode and valid format message id, aborts otherwise.
629 Patch contributed by Heiko Schlichting.
631 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
632 certextract with support for various fields. Bug 1358.
634 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
635 is requested by default, modifiable by smtp transport option
638 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
639 operate on certificate variables to give certificate fingerprints
640 Also new ${sha256:cert_variable}.
642 JH/23 The PRDR feature is moved from being Experimental into the mainline.
644 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
645 Christian Aistleitner.
647 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
649 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
650 file. Patch from Wolfgang Breyha.
652 JH/25 Expand the coverage of the delivery $host and $host_address to
653 client authenticators run in verify callout. Bug 1476.
655 JH/26 Port service names are now accepted for tls_on_connect_ports, to
656 align with daemon_smtp_ports. Bug 72.
658 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
659 support and error reporting did not work properly.
661 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
662 and is readable. Patch from Andrew Colin Kissa.
664 TL/14 Enhance documentation of ${run expansion and how it parses the
665 commandline after expansion, particularly in the case when an
666 unquoted variable expansion results in an empty value.
668 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
670 PP/02 Fix internal collision of T_APL on systems which support RFC3123
671 by renaming away from it. Addresses GH issue 15, reported by
674 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
676 TL/15 SECURITY: prevent double expansion in math comparison functions
677 (can expand unsanitized data). Not remotely exploitable.
684 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
686 PP/02 Make -n do something, by making it not do something.
687 When combined with -bP, the name of an option is not output.
689 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
692 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
693 $sender_host_name and config options to manage this, and basic check
696 PP/05 DSCP support for outbound connections and control modifier for inbound.
698 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
699 (Only plugin which currently uses this is kerberos4, which nobody should
700 be using, but we should make it available and other future plugins might
701 conceivably use it, even though it would break NAT; stuff *should* be
702 using channel bindings instead).
704 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
705 name; added for Sendmail compatibility; requires admin caller.
706 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
707 just ignore it); requires trusted caller.
708 Also parse but ignore: -Ac -Am -X<logfile>
711 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
713 TL/02 Add +smtp_confirmation as a default logging option.
715 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
716 Patch by Magnus Holmgren from 2007-02-20.
718 TL/04 Bugzilla 1281 - Spec typo.
719 Bugzilla 1283 - Spec typo.
720 Bugzilla 1290 - Spec grammar fixes.
722 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
724 TL/06 Add Experimental DMARC support using libopendmarc libraries.
726 TL/07 Fix an out of order global option causing a segfault. Reported to dev
727 mailing list by by Dmitry Isaikin.
729 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
731 JH/02 Support "G" suffix to numbers in ${if comparisons.
733 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
735 NM/01 Bugzilla 1197 - Spec typo
736 Bugzilla 1196 - Spec examples corrections
738 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
740 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
741 gnutls_enable_pkcs11, but renamed to more accurately indicate its
744 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
745 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
747 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
748 "acl {{name}{arg}...}", and optional args on acl condition
751 JH/05 Permit multiple router/transport headers_add/remove lines.
753 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
755 JH/07 Avoid using a waiting database for a single-message-only transport.
756 Performance patch from Paul Fisher. Bugzilla 1262.
758 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
761 JH/09 Add $headers_added variable, with content from use of ACL modifier
762 add_header (but not yet added to the message). Bugzilla 199.
764 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
765 Pulled from Bugzilla 817 by Wolfgang Breyha.
767 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
769 (nb: this is the same fix as in Exim 4.80.1)
771 JH/11 Add A= logging on delivery lines, and a client_set_id option on
774 JH/12 Add optional authenticated_sender logging to A= and a log_selector
777 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
779 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
780 advertise SMTP AUTH mechanism to us, instead of a generic
781 protocol violation error. Also, make Exim more robust to bad
782 data from the Dovecot auth socket.
784 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
786 When a queue runner is handling a message, Exim first routes the
787 recipient addresses, during which it prunes them based on the retry
788 hints database. After that it attempts to deliver the message to
789 any remaining recipients. It then updates the hints database using
792 So if a recipient address works intermittently, it can get repeatedly
793 deferred at routing time. The retry hints record remains fresh so the
794 address never reaches the final cutoff time.
796 This is a fairly common occurrence when a user is bumping up against
797 their storage quota. Exim had some logic in its local delivery code
798 to deal with this. However it did not apply to per-recipient defers
799 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
801 This change adds a proper retry rule check during routing so that the
802 final cutoff time is checked against the message's age. We only do
803 this check if there is an address retry record and there is not a
804 domain retry record; this implies that previous attempts to handle
805 the address had the retry_use_local_parts option turned on. We use
806 this as an approximation for the destination being like a local
807 delivery, as in LMTP.
809 I suspect this new check makes the old local delivery cutoff check
810 redundant, but I have not verified this so I left the code in place.
812 TF/02 Correct gecos expansion when From: is a prefix of the username.
814 Test 0254 submits a message to Exim with the header
818 When I ran the test suite under the user fanf2, Exim expanded
819 the header to contain my full name, whereas it should have added
820 a Resent-Sender: header. It erroneously treats any prefix of the
821 username as equal to the username.
823 This change corrects that bug.
825 GF/01 DCC debug and logging tidyup
826 Error conditions log to paniclog rather than rejectlog.
827 Debug lines prefixed by "DCC: " to remove any ambiguity.
829 TF/03 Avoid unnecessary rebuilds of lookup-related code.
831 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
832 Bug spotted by Jeremy Harris; was flawed since initial commit.
833 Would have resulted in OCSP responses post-SNI triggering an Exim
834 NULL dereference and crash.
836 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
838 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
839 Bug detection, analysis and fix by Samuel Thibault.
840 Bugzilla 1331, Debian bug #698092.
842 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
844 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
845 Server implementation by Todd Lyons, client by JH.
846 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
847 config variable "prdr_enable" controls whether the server
848 advertises the facility. If the client requests PRDR a new
849 acl_data_smtp_prdr ACL is called once for each recipient, after
850 the body content is received and before the acl_smtp_data ACL.
851 The client is controlled by bolth of: a hosts_try_prdr option
852 on the smtp transport, and the server advertisement.
853 Default client logging of deliveries and rejections involving
854 PRDR are flagged with the string "PRDR".
856 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
857 fclose(). Diagnosis by Todd Lyons.
859 PP/17 Update configure.default to handle IPv6 localhost better.
860 Patch by Alain Williams (plus minor tweaks).
863 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
864 This is now consistent with GnuTLS, and is now documented: the
865 previous undocumented portable approach to treating the option as
866 unset was to force an expansion failure. That still works, and
867 an empty string is now equivalent.
869 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
870 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
871 not performing validation itself.
873 PP/20 Added force_command boolean option to pipe transport.
874 Patch from Nick Koston, of cPanel Inc.
876 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
879 TF/04 Added udpsend ACL modifer and hexquote expansion operator
881 PP/21 Fix eximon continuous updating with timestamped log-files.
882 Broken in a format-string cleanup in 4.80, missed when I repaired the
883 other false fix of the same issue.
884 Report and fix from Heiko Schlichting.
887 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
888 Report from Prashanth Katuri.
890 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
891 It's SecureTransport, so affects any MacOS clients which use the
892 system-integrated TLS libraries, including email clients.
894 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
895 using a MIME ACL for non-SMTP local injection.
896 Report and assistance in diagnosis by Warren Baker.
898 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
900 JH/16 Fix comparisons for 64b. Bugzilla 1385.
902 TL/09 Add expansion variable $authenticated_fail_id to keep track of
903 last id that failed so it may be referenced in subsequent ACL's.
905 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
908 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
909 ldap library initialization, allowing self-signed CA's to be
910 used. Also properly sets require_cert option later in code by
911 using NULL (global ldap config) instead of ldap handle (per
912 session). Bug diagnosis and testing by alxgomz.
914 TL/12 Enhanced documentation in the ratelimit.pl script provided in
915 the src/util/ subdirectory.
917 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
918 renamed to Transport Post Delivery Action by Jeremy Harris, as
921 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
922 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
923 redis_servers = needs to be configured which will be used by the redis
924 lookup. Patch from Warren Baker, of The Packet Hub.
926 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
928 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
929 hostname or reverse DNS when processing a host list. Used suggestions
930 from multiple comments on this bug.
932 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
934 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
935 Missed a few lines, added it to make the runtest require no keyboard
938 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
939 contains upper case chars. Make router use caseful_local_part.
941 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
942 support when GnuTLS has been built with p11-kit.
948 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
950 This, or similar/improved, will also be change PP/11 of 4.82.
956 PP/01 Handle short writes when writing local log-files.
957 In practice, only affects FreeBSD (8 onwards).
958 Bugzilla 1053, with thanks to Dmitry Isaikin.
960 NM/01 Bugzilla 949 - Documentation tweak
962 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
965 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
967 PP/02 Implemented gsasl authenticator.
969 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
971 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
972 `pkg-config foo` for cflags/libs.
974 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
975 with rest of GSASL and with heimdal_gssapi.
977 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
978 `pkg-config foo` for cflags/libs for the TLS implementation.
980 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
981 properties get this fed in as external SSF. A number of robustness
982 and debugging improvements to the cyrus_sasl authenticator.
984 PP/08 cyrus_sasl server now expands the server_realm option.
986 PP/09 Bugzilla 1214 - Log authentication information in reject log.
987 Patch by Jeremy Harris.
989 PP/10 Added dbmjz lookup type.
991 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
993 PP/12 MAIL args handles TAB as well as SP, for better interop with
994 non-compliant senders.
995 Analysis and variant patch by Todd Lyons.
997 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
998 Bug report from Lars Müller <lars@samba.org> (via SUSE),
999 Patch from Dirk Mueller <dmueller@suse.com>
1001 PP/13 tls_peerdn now print-escaped for spool files.
1002 Observed some $tls_peerdn in wild which contained \n, which resulted
1003 in spool file corruption.
1005 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1006 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1007 or write after TLS renegotiation, which otherwise led to messages
1010 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1011 as a tracking header (ie: a signed header comes before the signature).
1012 Patch from Wolfgang Breyha.
1014 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1015 comma-sep list; embedded commas doubled.
1017 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1019 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1021 Report and patch from Dmitry Banschikov.
1023 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
1024 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1025 failures. We appear to now support TLS1.1+ with Exim.
1027 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1028 lets Exim select keys and certificates based upon TLS SNI from client.
1029 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1030 before an outbound SMTP session. New log_selector, +tls_sni.
1032 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1033 NULL dereference. Report and patch from Alun Jones.
1035 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1036 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1037 Not seeing resolver debug output on NetBSD, but suspect this is a
1038 resolver implementation change.
1040 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1041 Left warnings. Added "eximon gdb" invocation mode.
1043 PP/21 Defaulting "accept_8bitmime" to true, not false.
1045 PP/22 Added -bw for inetd wait mode support.
1047 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1048 locate the relevant includes and libraries. Made this the default.
1050 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1051 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1053 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1054 This may cause build issues on older platforms.
1056 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1057 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1058 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1059 Added SNI support via GnuTLS too.
1060 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1062 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1064 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1065 Applied second patch from Janne, implementing suggestion to default
1066 multiple-strings-in-record handling to match SPF spec.
1068 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1070 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1071 read-only, out of scope).
1072 Patch from Wolfgang Breyha, report from Stuart Northfield.
1074 PP/29 Fix three issues highlighted by clang analyser static analysis.
1075 Only crash-plausible issue would require the Cambridge-specific
1076 iplookup router and a misconfiguration.
1077 Report from Marcin Mirosław.
1079 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1081 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1082 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1083 As part of this, removing so much warning spew let me fix some minor
1084 real issues in debug logging.
1086 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1087 assignment on my part. Fixed.
1089 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1090 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1091 Janne Snabb (who went above and beyond: thank you).
1093 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1094 string otherwise requires a connection and a bunch more work and it's
1095 relatively easy to get wrong. Should also expose TLS library linkage
1098 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1099 64-bit ${eval} (JH/03).
1101 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1102 GNU libc to support some of the 64-bit stuff, should not lead to
1103 conflicts. Defined before os.h is pulled in, so if a given platform
1104 needs to override this, it can.
1106 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1107 protection layer was required, which is not implemented.
1108 Bugzilla 1254, patch from Wolfgang Breyha.
1110 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1111 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1112 tls_dhparam take prime identifiers. Also unbreak combination of
1113 OpenSSL+DH_params+TLSSNI.
1115 PP/39 Disable SSLv2 by default in OpenSSL support.
1121 PP/01 Solaris build fix for Oracle's LDAP libraries.
1122 Bugzilla 1109, patch from Stephen Usher.
1124 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1126 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1129 TF/02 Fix a couple more cases where we did not log the error message
1130 when unlink() failed. See also change 4.74-TF/03.
1132 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1133 lock up or crash if it happened to be inside a call to libc when it
1134 got a SIGUSR1 from exiwhat.
1136 The SIGUSR1 handler appends the current process status to the process
1137 log which is later printed by exiwhat. It used to use the general
1138 purpose logging code to do this, but several functions it calls are
1139 not safe for signals.
1141 The new output code in the SIGUSR1 handler is specific to the process
1142 log, and simple enough that it's easy to inspect for signal safety.
1143 Removing some special cases also simplifies the general logging code.
1144 Removing the spurious timestamps from the process log simplifies
1147 TF/04 Improved ratelimit ACL condition.
1149 The /noupdate option has been deprecated in favour of /readonly which
1150 has clearer semantics. The /leaky, /strict, and /readonly update modes
1151 are mutually exclusive. The update mode is no longer included in the
1152 database key; it just determines when the database is updated. (This
1153 means that when you upgrde Exim will forget old rate measurements.)
1155 Exim now checks that the per_* options are used with an update mode that
1156 makes sense for the current ACL. For example, when Exim is processing a
1157 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1158 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1159 must specify per_mail/readonly. If you omit the update mode it defaults to
1160 /leaky where that makes sense (as before) or /readonly where required.
1162 The /noupdate option is now undocumented but still supported for
1163 backwards compatibility. It is equivalent to /readonly except that in
1164 ACLs where /readonly is required you may specify /leaky/noupdate or
1165 /strict/noupdate which are treated the same as /readonly.
1167 A useful new feature is the /count= option. This is a generalization
1168 of the per_byte option, so that you can measure the throughput of other
1169 aggregate values. For example, the per_byte option is now equivalent
1170 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1172 The per_rcpt option has been generalized using the /count= mechanism
1173 (though it's more complicated than the per_byte equivalence). When it is
1174 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1175 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1176 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1177 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1178 Note that using per_rcpt with a non-readonly update mode in more than
1179 one ACL will cause the recipients to be double-counted. (The per_mail
1180 and per_byte options don't have this problem.)
1182 The handling of very low rates has changed slightly. If the computed rate
1183 is less than the event's count (usually one) then this event is the first
1184 after a long gap. In this case the rate is set to the same as this event's
1185 count, so that the first message of a spam run is counted properly.
1187 The major new feature is a mechanism for counting the rate of unique
1188 events. The new per_addr option counts the number of different
1189 recipients that someone has sent messages to in the last time period. It
1190 behaves like per_rcpt if all the recipient addresses are different, but
1191 duplicate recipient addresses do not increase the measured rate. Like
1192 the /count= option this is a general mechanism, so the per_addr option
1193 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1194 example, measure the rate that a client uses different sender addresses
1195 with the options per_mail/unique=$sender_address. There are further
1196 details in the main documentation.
1198 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1200 TF/06 Removed a few PCRE remnants.
1202 TF/07 Automatically extract Exim's version number from tags in the git
1203 repository when doing development or release builds.
1205 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1206 Bugzilla 879. Patch from Paul Fisher.
1208 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1209 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1212 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1214 PP/05 Variable $av_failed, true if the AV scanner deferred.
1215 Bugzilla 1078. Patch from John Horne.
1217 PP/06 Stop make process more reliably on build failure.
1218 Bugzilla 1087. Patch from Heiko Schlittermann.
1220 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1221 Bugzilla 1089. Patch from Heiko Schlittermann.
1223 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1224 Bugzilla 1131. Patch from Holger Weiß.
1226 PP/09 Handle IPv6 addresses with SPF.
1227 Bugzilla 860. Patch from Wolfgang Breyha.
1229 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1231 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1234 PP/11 match_* no longer expand right-hand-side by default.
1235 New compile-time build option, EXPAND_LISTMATCH_RHS.
1236 New expansion conditions, "inlist", "inlisti".
1238 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1240 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1242 PP/14 fix log_write() format string regression from TF/03.
1243 Bugzilla 1152. Patch from Dmitry Isaikin.
1249 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1251 PP/02 Harmonised TLS library version reporting; only show if debugging.
1252 Layout now matches that introduced for other libraries in 4.74 PP/03.
1254 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1256 PP/04 New "dns_use_edns0" global option.
1258 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1261 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1262 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1264 TK/01 Updated PolarSSL code to 0.14.2.
1265 Bugzilla 1097. Patch from Andreas Metzler.
1267 PP/07 Catch divide-by-zero in ${eval:...}.
1268 Fixes bugzilla 1102.
1270 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1273 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1274 format-string attack -- SECURITY: remote arbitrary code execution.
1276 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1277 time unintentionally subject to list matching rules, letting the header
1278 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1279 arbitrary string expansion). This allowed for information disclosure.
1281 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1282 INT_MIN/-1 -- value coerced to INT_MAX.
1288 NM/01 Workround for PCRE version dependency in version reporting
1291 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1292 This fixes portability to compilers other than gcc, notably
1293 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1295 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1296 makefiles for portability to HP-UX and POSIX correctness.
1298 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1299 Also via indented variable definition in the Makefile.
1300 (Debugging by Oliver Heesakkers).
1302 PP/02 Restore caching of spamd results with expanded spamd_address.
1303 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1305 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1306 Improves build reliability. Fix from: Frank Elsner
1308 NM/02 Fix wide character breakage in the rfc2047 coding
1309 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1311 NM/03 Allow underscore in dnslist lookups
1312 Fixes bug 1026. Patch from Graeme Fowler
1314 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1315 Code patches from Adam Ciarcinski of NetBSD.
1317 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1320 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1321 is logged, to avoid truncation. Patch from John Horne.
1323 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1324 Patch from Jakob Hirsch.
1326 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1327 SQL string expansion failure details.
1328 Patch from Andrey Oktyabrski.
1330 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1331 Patch from Simon Arlott.
1333 PP/09 New lookups functionality failed to compile on old gcc which rejects
1334 extern declarations in function scope.
1335 Patch from Oliver Fleischmann
1337 PP/10 Use sig_atomic_t for flags set from signal handlers.
1338 Check getgroups() return and improve debugging.
1339 Fixed developed for diagnosis in bug 927 (which turned out to be
1342 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1343 Patch from Mark Zealey.
1345 PP/12 Bugzilla 1056: Improved spamd server selection.
1346 Patch from Mark Zealey.
1348 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1349 Based on patch from Heiko Schlittermann.
1351 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1352 Patch from Uwe Doering, sign-off by Michael Haardt.
1354 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1355 variable declaration deep within a block. Bug and patch from
1358 PP/15 lookups-Makefile IRIX compatibilty coercion.
1360 PP/16 Make DISABLE_DKIM build knob functional.
1362 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1363 Patch by Simon Arlott
1365 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1366 variable argument macros. Our copy now differs from upstream.
1372 TF/01 Failure to get a lock on a hints database can have serious
1373 consequences so log it to the panic log.
1375 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1376 controlled using the smtp_confirmation log selector.
1378 TF/03 Include the error message when we fail to unlink a spool file.
1380 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1381 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1382 for maintaining out-of-tree patches for some time.
1384 PP/01 Bugzilla 139: Documentation and portability issues.
1385 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1386 Handle per-OS dynamic-module compilation flags.
1388 PP/02 Let /dev/null have normal permissions.
1389 The 4.73 fixes were a little too stringent and complained about the
1390 permissions on /dev/null. Exempt it from some checks.
1391 Reported by Andreas M. Kirchwitz.
1393 PP/03 Report version information for many libraries, including
1394 Exim version information for dynamically loaded libraries. Created
1395 version.h, now support a version extension string for distributors
1396 who patch heavily. Dynamic module ABI change.
1398 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1399 privilege escalation vulnerability whereby the Exim run-time user
1400 can cause root to append content of the attacker's choosing to
1403 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1406 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1407 If dropping privileges for untrusted macros, we disabled normal logging
1408 on the basis that it would fail; for the Exim run-time user, this is not
1409 the case, and it resulted in successful deliveries going unlogged.
1410 Fixed. Reported by Andreas Metzler.
1416 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1417 only prepend for the Resent-* case. Fixes regression introduced in
1418 Exim 4.70 by NM/22 for Bugzilla 607.
1420 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1421 increasing numbers of administrators be bitten by this.
1423 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1425 PP/03 Bugzilla 994: added openssl_options main configuration option.
1427 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1429 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1431 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1433 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1434 without a peer certificate, leading to a segfault because of an
1435 assumption that peers always have certificates. Be a little more
1436 paranoid. Problem reported by Martin Tscholak.
1438 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1439 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1440 NB: ClamAV planning to remove STREAM in "middle of 2010".
1441 CL also introduces -bmalware, various -d+acl logging additions and
1442 more caution in buffer sizes.
1444 PP/09 Implemented reverse_ip expansion operator.
1446 PP/10 Bugzilla 937: provide a "debug" ACL control.
1448 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1450 PP/12 Bugzilla 973: Implement --version.
1452 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1454 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1456 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1458 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1459 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1460 ignore trailing whitespace.
1462 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1464 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1467 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1468 Notification from Dr Andrew Aitchison.
1470 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1471 ExtendedDetectionInfo response format.
1472 Notification from John Horne.
1474 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1477 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1478 XSL and documented dependency on system catalogs, with examples of how
1481 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1484 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1485 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1486 configuration file which is writeable by the Exim user or group.
1488 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1489 of configuration files to cover files specified with the -C option if
1490 they are going to be used with root privileges, not just the default
1493 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1494 option (effectively making it always true).
1496 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1497 files to be used while preserving root privileges.
1499 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1500 that rogue child processes cannot use them.
1502 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1503 run-time user, instead of root.
1505 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1506 Exim run-time user without dropping privileges.
1508 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1509 result string, instead of calling string_vformat() twice with the same
1512 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1513 for other users. Others should always drop root privileges if they use
1514 -C on the command line, even for a whitelisted configure file.
1516 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1518 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1524 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1525 $data_path, and $header_path variables; fixed documentation bugs and
1528 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1529 exipick to access non-standard spools, including the "frozen" queue
1532 NM/01 Bugzilla 965: Support mysql stored procedures.
1533 Patch from Alain Williams
1535 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1537 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1538 Patch from Andreas Metzler
1540 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1541 Patch from Kirill Miazine
1543 NM/05 Bugzilla 671: Added umask to procmail example.
1545 JJ/03 installed exipick 20100323.0, fixing doc bug
1547 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1548 directory. Notification and patch from Dan Rosenberg.
1550 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1552 TK/02 Improve log output when DKIM signing operation fails.
1554 MH/01 Treat the transport option dkim_domain as a colon separated
1555 list, not as a single string, and sign the message with each element,
1556 omitting multiple occurences of the same signer.
1558 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1559 Bugzilla 985, 986. Patch by Simon Arlott
1561 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1562 Patch by Simon Arlott
1564 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1565 MBX locking. Notification from Dan Rosenberg.
1571 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1573 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1575 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1577 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1579 NM/04 Bugzilla 915: Flag broken perl installation during build.
1585 TK/01 Added patch by Johannes Berg that expands the main option
1586 "spamd_address" if it starts with a dollar sign.
1588 TK/02 Write list of recipients to X-Envelope-Sender header when building
1589 the mbox-format spool file for content scanning (suggested by Jakob
1592 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1593 (http://www.dcc-servers.net/) support via dccifd. Activated by
1594 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1596 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1597 by Mark Daniel Reidel <mr@df.eu>.
1599 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1600 When building exim an external PCRE library is now needed -
1601 PCRE is a system library on the majority of modern systems.
1602 See entry on PCRE_LIBS in EDITME file.
1604 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1605 conversation. Added nologin parameter to request.
1606 Patch contributed by Kirill Miazine.
1608 TF/01 Do not log submission mode rewrites if they do not change the address.
1610 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1612 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1613 log files in place. Contributed by Roberto Lima.
1615 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1617 TF/03 Bugzilla 615: When checking the local_parts router precondition
1618 after a local_part_suffix or local_part_prefix option, Exim now
1619 does not use the address's named list lookup cache, since this
1620 contains cached lookups for the whole local part.
1622 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1623 Robert Millan. Documentation is in experimental-spec.txt.
1625 TF/04 Bugzilla 668: Fix parallel build (make -j).
1627 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1629 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1630 Patch provided by Jan Srzednicki.
1632 TF/05 Leading white space used to be stripped from $spam_report which
1633 wrecked the formatting. Now it is preserved.
1635 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1636 that they are available at delivery time.
1638 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1640 TF/08 TLS error reporting now respects the incoming_interface and
1641 incoming_port log selectors.
1643 TF/09 Produce a more useful error message if an SMTP transport's hosts
1644 setting expands to an empty string.
1646 NM/06 Bugzilla 744: EXPN did not work under TLS.
1647 Patch provided by Phil Pennock.
1649 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1650 Patch provided by Richard Godbee.
1652 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1653 acl_smtp_notquit, added index entry.
1655 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1656 Patch provided by Eugene Bujak.
1658 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1659 accept(). Patch provided by Maxim Dounin.
1661 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1662 Patch provided by Phil Pennock.
1664 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1666 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1667 Patch provided by Brad "anomie" Jorsch.
1669 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1670 Patch provided by Dean Brooks.
1672 TK/05 Add native DKIM support (does not depend on external libraries).
1674 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1675 Patch provided by Graeme Fowler.
1677 NM/16 Bugzilla 851: Documentation example syntax fix.
1679 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1681 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1684 NM/19 Bugzilla 745: TLS version reporting.
1685 Patch provided by Phil Pennock.
1687 NM/20 Bugzilla 167: bool: condition support.
1688 Patch provided by Phil Pennock.
1690 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1691 clients. Patch provided by Phil Pennock.
1693 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1694 Patch provided by Brad "anomie" Jorsch.
1696 NM/23 Bugzilla 687: Fix misparses in eximstats.
1697 Patch provided by Heiko Schlittermann.
1699 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1700 Patch provided by Heiko Schlittermann.
1702 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1703 plus update to original patch.
1705 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1707 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1708 Patch provided by David Brownlee.
1710 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1712 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1714 NM/30 Bugzilla 888: TLS documentation bugfixes.
1716 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1718 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1719 Unlike the original bugzilla I have changed all shell scripts in src tree.
1721 NM/33 Bugzilla 898: Transport filter timeout fix.
1722 Patch by Todd Rinaldo.
1724 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1725 Patch by Serge Demonchaux.
1727 NM/35 Bugzilla 39: Base64 decode bug fixes.
1728 Patch by Jakob Hirsch.
1730 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1732 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1734 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1736 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1742 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1743 ALT-N's libdkim that I have put here:
1744 http://duncanthrax.net/exim-experimental/
1746 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1747 were called 'true' and it seems that C99 defines that as a reserved
1748 keyword to be used with 'bool' variable types. That means you could
1749 not include C99-style headers which use bools without triggering
1750 build errors in sieve.c.
1752 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1753 as mailq or other aliases. Changed the --help handling significantly
1754 to do whats expected. exim_usage() emits usage/help information.
1756 SC/01 Added the -bylocaldomain option to eximstats.
1758 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1760 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1762 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1768 PH/01 Another patch from the Sieve maintainer.
1770 PH/02 When an IPv6 address is converted to a string for single-key lookup
1771 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1772 dots are used instead of colons so that keys in lsearch files need not
1773 contain colons. This was done some time before quoting was made available
1774 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1775 (notated using the quote facility) so as to distinguish them from IPv4
1776 keys. This meant that lookups for IP addresses in host lists did not work
1777 for iplsearch lookups.
1779 This has been fixed by arranging for IPv6 addresses to be expressed with
1780 colons if the lookup type is iplsearch. This is not incompatible, because
1781 previously such lookups could never work.
1783 The situation is now rather anomolous, since one *can* have colons in
1784 ordinary lsearch keys. However, making the change in all cases is
1785 incompatible and would probably break a number of configurations.
1787 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1790 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1791 conversion specification without a maximum field width, thereby enabling
1792 a rogue spamd server to cause a buffer overflow. While nobody in their
1793 right mind would setup Exim to query an untrusted spamd server, an
1794 attacker that gains access to a server running spamd could potentially
1795 exploit this vulnerability to run arbitrary code as the Exim user.
1797 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1798 $primary_hostname instead of what libspf2 thinks the hosts name is.
1800 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1801 a directory entry by the name of the lookup key. Previously, if a
1802 symlink pointed to a non-existing file or a file in a directory that
1803 Exim lacked permissions to read, a lookup for a key matching that
1804 symlink would fail. Now it is enough that a matching directory entry
1805 exists, symlink or not. (Bugzilla 503.)
1807 PH/03 The body_linecount and body_zerocount variables are now exported in the
1810 PH/04 Added the $dnslist_matched variable.
1812 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1813 This means they are set thereafter only if the connection becomes
1816 PH/06 Added the client_condition to authenticators so that some can be skipped
1817 by clients under certain conditions.
1819 PH/07 The error message for a badly-placed control=no_multiline_responses left
1820 "_responses" off the end of the name.
1822 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1824 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1825 (without spaces) instead of just copying the configuration text.
1827 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1829 PH/11 Added $max_received_linelength.
1831 PH/12 Added +ignore_defer and +include_defer to host lists.
1833 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1834 way in which PCRE > 7.0 is built.
1836 PH/14 Implemented queue_only_load_latch.
1838 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1839 MAIL command. The effect was to mangle the value on 64-bit systems.
1841 PH/16 Another patch from the Sieve maintainer.
1843 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1845 PH/18 If a system quota error occurred while trying to create the file for
1846 a maildir delivery, the message "Mailbox is full" was not appended to the
1847 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1848 only to a quota excession during the actual writing of the file.
1850 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1851 characters?) which causes problems in log lines. The DN values are now
1852 passed through string_printing() before being added to log lines.
1854 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1855 and InterBase are left for another time.)
1857 PH/21 Added message_body_newlines option.
1859 PH/22 Guard against possible overflow in moan_check_errorcopy().
1861 PH/23 POSIX allows open() to be a macro; guard against that.
1863 PH/24 If the recipient of an error message contained an @ in the local part
1864 (suitably quoted, of course), incorrect values were put in $domain and
1865 $local_part during the evaluation of errors_copy.
1871 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1872 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1875 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1876 issue a MAIL command.
1878 PH/02 In an ACL statement such as
1880 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1882 if a client was not listed at all, or was listed with a value other than
1883 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1884 the condition was not true (as it should be), so access was not denied.
1885 The bug was that the ! inversion was incorrectly passed on to the second
1886 item. This has been fixed.
1888 PH/03 Added additional dnslists conditions == and =& which are different from
1889 = and & when the dns lookup returns more than one IP address.
1891 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1892 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1894 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1895 FSYNC, which compiles an option called disable_fsync that allows for
1896 bypassing fsync(). The documentation is heavily laced with warnings.
1898 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1900 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1901 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1902 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1903 including adding "make clean"; (3) Added -fPIC when compiling the test
1904 dynamically loaded module, to get rid of a warning.
1906 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1907 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1908 = 0s. The bug is otherwise harmless.
1910 PH/07 There was a bug in the dovecot authenticator such that the value of
1911 $auth1 could be overwritten, and so not correctly preserved, after a
1912 successful authentication. This usually meant that the value preserved by
1913 the server_setid option was incorrect.
1915 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1917 PH/09 Installed PCRE release 7.0.
1919 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1920 run for batched SMTP input. It is now run at the start of every message
1921 in the batch. While fixing this I discovered that the process information
1922 (output by running exiwhat) was not always getting set for -bs and -bS
1923 input. This is fixed, and it now also says "batched" for BSMTP.
1925 PH/11 Added control=no_pipelining.
1927 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1928 patch, slightly modified), and move the expansion of helo_data till after
1929 the connection is made in the smtp transport (so it can use these
1932 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1934 PH/14 Added log_selector = +pid.
1936 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1938 PH/16 Add ${if forany and ${if forall.
1940 PH/17 Added dsn_from option to vary the From: line in DSNs.
1942 PH/18 Flush SMTP output before performing a callout, unless control =
1943 no_callout_flush is set.
1945 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1946 was true (the default) a successful delivery failed to delete the retry
1947 item, thus causing premature timeout of the address. The bug is now
1950 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1952 PH/21 Long custom messages for fakedefer and fakereject are now split up
1953 into multiline reponses in the same way that messages for "deny" and
1954 other ACL rejections are.
1956 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1957 with slight modification.
1959 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1960 draft, changing the syntax and factoring some duplicate code".
1962 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1963 for deliveries of the second and subsequent messages over the same SMTP
1966 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1967 ${reduce, with only minor "tidies".
1969 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1971 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1972 expansion side effects.
1974 PH/27 When a message times out after an over-quota error from an Exim-imposed
1975 quota, the bounce message says "mailbox is full". This message was not
1976 being given when it was a system quota that was exceeded. It now should
1979 MH/03 Made $recipients available in local_scan(). local_scan() already has
1980 better access to the recipient list through recipients_list[], but
1981 $recipients can be useful in postmaster-provided expansion strings.
1983 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1984 in the case of a MAIL command with additional options following the
1985 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1986 were accidentally chopped off.
1988 PH/29 SMTP synchronization checks are implemented when a command is read -
1989 there is a check that no more input is waiting when there shouldn't be
1990 any. However, for some commands, a delay in an ACL can mean that it is
1991 some time before the response is written. In this time, more input might
1992 arrive, invalidly. So now there are extra checks after an ACL has run for
1993 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1994 pipelining has not been advertised.
1996 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1998 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1999 returned in the SMTP response when smtp_return_error_details was false.
2000 This has been fixed.
2002 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2003 instead of the C I/O that was originally supplied, because problems were
2004 reported on Solaris.
2006 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2007 Exim which did not show up earlier: it was assuming that a call to
2008 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2009 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2010 was a macro that became an assignment, so it seemed to work. This has
2011 changed to a proper function call with a void return, hence the compile
2012 error. Exim's code has been fixed.
2014 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2017 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2019 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2021 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2022 because it turns out to be too big or there is a timeout) there is no
2023 "Completed" line in the log. When some messages of this type were
2024 selected by exigrep, they were listed as "not completed". Others were
2025 picked up by some special patterns. I have improved the selection
2026 criteria to be more general.
2028 PH/38 The host_find_failed option in the manualroute router can now be set
2029 to "ignore", to completely ignore a host whose IP address cannot be
2030 found. If all hosts are ignored, the behaviour is controlled by the new
2031 host_all_ignored option.
2033 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2034 homing or because of multiple MX records with /mx) generated more than
2035 one IP address, and the following item turned out to be the local host,
2036 all the secondary addresses of the first item were incorrectly removed
2037 from the list, along with the local host and any following hosts (which
2038 is what is supposed to happen).
2040 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2041 whoever called Exim into the -H file. In the case of the daemon it was
2042 behaving confusingly. When first started, it used values for whoever
2043 started the daemon, but after a SIGHUP it used the Exim user (because it
2044 calls itself on a restart). I have changed the code so that it now always
2047 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2048 message are rejected with the same error (e.g. no authentication or bad
2049 sender address), and a DATA command is nevertheless sent (as can happen
2050 with PIPELINING or a stupid MUA), the error message that was given to the
2051 RCPT commands is included in the rejection of the DATA command. This is
2052 intended to be helpful for MUAs that show only the final error to their
2055 PH/42 Another patch from the Sieve maintainer.
2057 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2058 Eximstats - Fixed some broken HTML links and added missing column headers
2060 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2061 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2063 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2065 PH/43 Yet another patch from the Sieve maintainer.
2067 PH/44 I found a way to check for a TCP/IP connection going away before sending
2068 the response to the final '.' that terminates a message, but only in the
2069 case where the client has not sent further data following the '.'
2070 (unfortunately, this is allowed). However, in many cases there won't be
2071 any further data because there won't be any more messages to send. A call
2072 to select() can be used: if it shows that the input is "ready", there is
2073 either input waiting, or the socket has been closed. An attempt to read
2074 the next input character can distinguish the two cases. Previously, Exim
2075 would have sent an OK response which the client would never have see.
2076 This could lead to message repetition. This fix should cure that, at
2077 least in a lot of common cases.
2079 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2080 advertised in response to EHLO.
2086 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2087 fixed by 4.65/MH/01 (is this a record?) are fixed:
2089 (i) An empty string was always treated as zero by the numeric comparison
2090 operators. This behaviour has been restored.
2092 (ii) It is documented that the numeric comparison operators always treat
2093 their arguments as decimal numbers. This was broken in that numbers
2094 starting with 0 were being interpreted as octal.
2096 While fixing these problems I realized that there was another issue that
2097 hadn't been noticed. Values of message_size_limit (both the global option
2098 and the transport option) were treated as octal if they started with 0.
2099 The documentation was vague. These values are now always treated as
2100 decimal, and I will make that clear in the documentation.
2106 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2107 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2110 MH/01 Don't check that the operands of numeric comparison operators are
2111 integers when their expansion is in "skipping" mode (fixes bug
2112 introduced by 4.64-PH/07).
2114 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2115 child addresses, Exim now panics and dies. Previously, because the count
2116 is held in a short int, deliveries were likely to be lost. As such a
2117 large number of recipients for a single message is ridiculous
2118 (performance will be very, very poor), I have chosen to impose a limit
2119 rather than extend the field.
2125 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2126 leftover -K file (the existence of which was triggered by #402).
2127 While we were at it, introduced process PID as part of the -K
2128 filename. This should rule out race conditions when creating
2131 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2132 processing considerably. Previous code took too long for large mails,
2133 triggering a timeout which in turn triggers #401.
2135 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2136 in the DK code in transports.c. sendfile() is not really portable,
2137 hence the _LINUX specificness.
2139 TF/01 In the add_headers option to the mail command in an Exim filter,
2140 there was a bug that Exim would claim a syntax error in any
2141 header after the first one which had an odd number of characters
2144 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2145 callout verification, Exim cached a "reject" for the entire domain. This
2146 is correct for most verifications, but it is not correct for a recipient
2147 verification with use_sender or use_postmaster set, because in that case
2148 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2149 case of MAIL FROM:<> rejection from other early rejections (e.g.
2150 rejection of HELO). When verifying a recipient using a non-null MAIL
2151 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2152 Whatever the result of the callout, the value of the domain cache is
2153 left unchanged (for any other kind of callout, getting as far as trying
2154 RCPT means that the domain itself is ok).
2156 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2159 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2160 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2161 session, the daemon ignores ECONNECT errors and logs others; it now
2162 ignores EPIPE as well.
2164 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2165 (quoted-printable decoding).
2167 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2168 later the small subsequent patch to fix an introduced bug.
2170 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2172 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2174 PH/08 An error is now given if message_size_limit is specified negative.
2176 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2177 to be given (somewhat) arbitrary names.
2179 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2182 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2183 miscellaneous code fixes
2185 PH/10 Added the log_reject_target ACL modifier to specify where to log
2188 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2189 hostname. This is wrong, because it relates to the incoming message (and
2190 probably the interface on which it is arriving) and not to the outgoing
2191 callout (which could be using a different interface). This has been
2192 changed to use the value of the helo_data option from the smtp transport
2193 instead - this is what is used when a message is actually being sent. If
2194 there is no remote transport (possible with a router that sets up host
2195 addresses), $smtp_active_hostname is used.
2197 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2198 tweaks were necessary in order to get it to work (see also 21 below):
2199 (a) The code assumed that strncpy() returns a negative number on buffer
2200 overflow, which isn't the case. Replaced with Exim's string_format()
2202 (b) There were several signed/unsigned issues. I just did the minimum
2203 hacking in of casts. There is scope for a larger refactoring.
2204 (c) The code used strcasecmp() which is not a standard C function.
2205 Replaced with Exim's strcmpic() function.
2206 (d) The code set only $1; it now sets $auth1 as well.
2207 (e) A simple test gave the error "authentication client didn't specify
2208 service in request". It would seem that Dovecot has changed its
2209 interface. Fortunately there's a specification; I followed it and
2210 changed what the client sends and it appears to be working now.
2212 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2215 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2216 address A is aliased to B and C, where B exists and C does not. Without
2217 -v the output is "A verified" because verification stops after a
2218 successful redirection if more than one address is generated. However,
2219 with -v the child addresses are also verified. Exim was outputting "A
2220 failed to verify" and then showing the successful verification for C,
2221 with its parentage. It now outputs "B failed to verify", showing B's
2222 parentage before showing the successful verification of C.
2224 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2225 look up a TXT record in a specific list after matching in a combined
2228 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2229 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2230 they consult the DNS. I had assumed they would set it the way they
2231 wanted; and indeed my experiments on Linux seem to show that in some
2232 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2233 To be on the safe side, however, I have now made the interface to
2234 host_find_byname() similar to host_find_bydns(), with an argument
2235 containing the DNS resolver options. The host_find_byname() function now
2236 sets these options at its start, just as host_find_bydns() does. The smtp
2237 transport options dns_qualify_single and dns_search_parents are passed to
2238 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2239 of host_find_byname() use the default settings of RES_DEFNAMES
2240 (qualify_single) but not RES_DNSRCH (search_parents).
2242 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2243 spool_read_header() do less string testing, by means of a preliminary
2244 switch on the second character of optional "-foo" lines. (This is
2245 overdue, caused by the large number of possibilities that now exist.
2246 Originally there were few.) While I was there, I also converted the
2247 str(n)cmp tests so they don't re-test the leading "-" and the first
2248 character, in the hope this might squeeze out yet more improvement.
2250 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2251 flag allowing group syntax was set by the header_syntax check but not
2252 turned off, possible causing trouble later; (2) The flag was not being
2253 set at all for the header_verify test, causing "group"-style headers to
2254 be rejected. I have now set it in this case, and also caused header_
2255 verify to ignore an empty address taken from a group. While doing this, I
2256 came across some other cases where the code for allowing group syntax
2257 while scanning a header line wasn't quite right (mostly, not resetting
2258 the flag correctly in the right place). These bugs could have caused
2259 trouble for malformed header lines. I hope it is now all correct.
2261 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2262 with the "reply" argument non-NULL. The code, however (which originally
2263 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2264 but it didn't always do it. This confused somebody who was copying the
2265 code for some other use. I have removed all the tests.
2267 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2268 feature that was used to support insecure browsers during the U.S. crypto
2269 embargo. It requires special client support, and Exim is probably the
2270 only MTA that supported it -- and would never use it because real RSA is
2271 always available. This code has been removed, because it had the bad
2272 effect of slowing Exim down by computing (never used) parameters for the
2273 RSA_EXPORT functionality.
2275 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2276 authenticator to fail if there's a tab character in the incoming data
2277 (there should never be unless someone is messing about, as it's supposed
2278 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2279 if the connection is using TLS or if the remote IP is the same as the
2280 local IP, and the "valid-client-cert option" if a client certificate has
2283 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2284 authenticators. This can be used for authorization after authentication
2285 succeeds. (In the case of plaintext, it servers for both authentication
2288 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2289 if any retry times were supplied.
2291 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2292 connection, where there is no client IP address to check. In this
2293 situation, the verify now always succeeds.
2295 PH/25 Applied John Jetmore's -Mset patch.
2297 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2299 PH/27 In a string expansion for a processed (not raw) header when multiple
2300 headers of the same name were present, leading whitespace was being
2301 removed from all of them, but trailing whitespace was being removed only
2302 from the last one. Now trailing whitespace is removed from each header
2303 before concatenation. Completely empty headers in a concatenation (as
2304 before) are ignored.
2306 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2307 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2309 PH/29 [Removed. This was a change that I later backed out, and forgot to
2310 correct the ChangeLog entry (that I had efficiently created) before
2311 committing the later change.]
2313 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2314 address errors (4xx response to RCPT) over the same connection as other
2315 messages routed to the same hosts. Such deliveries are always "forced",
2316 so retry times are not inspected. This resulted in far too many retries
2317 for the affected addresses. The effect occurred only when there were more
2318 hosts than the hosts_max_try setting in the smtp transport when it had
2319 the 4xx errors. Those hosts that it had tried were not added to the list
2320 of hosts for which the message was waiting, so if all were tried, there
2321 was no problem. Two fixes have been applied:
2323 (i) If there are any address or message errors in an SMTP delivery, none
2324 of the hosts (tried or untried) are now added to the list of hosts
2325 for which the message is waiting, so the message should not be a
2326 candidate for sending over the same connection that was used for a
2327 successful delivery of some other message. This seems entirely
2328 reasonable: after all the message is NOT "waiting for some host".
2329 This is so "obvious" that I'm not sure why it wasn't done
2330 previously. Hope I haven't missed anything, but it can't do any
2331 harm, as the worst effect is to miss an optimization.
2333 (ii) If, despite (i), such a delivery is accidentally attempted, the
2334 routing retry time is respected, so at least it doesn't keep
2335 hammering the server.
2337 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2338 in ${readsocket because some servers need this prod.
2340 PH/32 Added some extra debug output when updating a wait-xxx database.
2342 PH/33 The hint "could be header name not terminated by colon", which has been
2343 given for certain expansion errors for a long time, was not being given
2344 for the ${if def:h_colon_omitted{... case.
2346 PH/34 The spec says: "With one important exception, whenever a domain list is
2347 being scanned, $domain contains the subject domain." There was at least
2348 one case where this was not true.
2350 PH/35 The error "getsockname() failed: connection reset by peer" was being
2351 written to the panic log as well as the main log, but it isn't really
2352 panic-worthy as it just means the connection died rather early on. I have
2353 removed the panic log writing for the ECONNRESET error when getsockname()
2356 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2357 runs only) independently of the message's sender address. This meant
2358 that, if the 4xx error was in fact related to the sender, a different
2359 message to the same recipient with a different sender could confuse
2360 things. In particualar, this can happen when sending to a greylisting
2361 server, but other circumstances could also provoke similar problems.
2362 I have changed the default so that the retry time for these errors is now
2363 based a combination of the sender and recipient addresses. This change
2364 can be overridden by setting address_retry_include_sender=false in the
2367 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2368 remote server are returned as part of bounce messages. This was not
2369 happening for LMTP over a pipe (the lmtp transport), but now it is the
2370 same for both kinds of LMTP.
2372 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2373 in header lines that were in fact CNAMEs. This is no longer the case.
2375 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2376 and queue runs started by the daemon processed all messages. This has
2377 been fixed so that -R and -S can now usefully be given with -q<time>.
2379 PH/40 Import PCRE release 6.7 (fixes some bugs).
2381 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2383 PH/42 Give an error if -q is specified more than once.
2385 PH/43 Renamed the variables $interface_address and $interface_port as
2386 $received_ip_address and $received_port, to make it clear that these
2387 values apply to message reception, and not to the outgoing interface when
2388 a message is delivered. (The old names remain recognized, of course.)
2390 PH/44 There was no timeout on the connect() call when using a Unix domain
2391 socket in the ${readsocket expansion. There now is.
2393 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2394 be meaningful with "accept".
2396 SC/01 Eximstats V1.43
2397 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2399 SC/02 Eximstats V1.44
2400 Use a glob alias rather than an array ref in the generated
2401 parser. This improves both readability and performance.
2403 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2404 Collect SpamAssassin and rejection statistics.
2405 Don't display local sender or destination tables unless
2406 there is data to show.
2407 Added average volumes into the top table text output.
2409 SC/04 Eximstats V1.46
2410 Collect data on the number of addresses (recipients)
2411 as well as the number of messages.
2413 SC/05 Eximstats V1.47
2414 Added 'Message too big' to the list of mail rejection
2415 reasons (thanks to Marco Gaiarin).
2417 SC/06 Eximstats V1.48
2418 Mainlog lines which have GMT offsets and are too short to
2419 have a flag are now skipped.
2421 SC/07 Eximstats V1.49 (Alain Williams)
2422 Added the -emptyok flag.
2424 SC/08 Eximstats V1.50
2425 Fixes for obtaining the IP address from reject messages.
2427 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2428 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2429 whitesspace changes from 4.64-PH/27
2431 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2434 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2435 are found, allow negative numbers in numeric criteria)
2437 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2439 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2440 to match changes made in 4.64-PH/43
2442 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2444 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2445 "domain" is actually an IP address, and force a failure. This locks out
2446 those revolvers/nameservers that support "A-for-A" lookups, in
2447 contravention of the specifications.
2449 PH/48 When a host name was looked up from an IP address, and the subsequent
2450 forward lookup of the name timed out, the host name was left in
2451 $sender_host_name, contrary to the specification.
2453 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2454 restricted to single-key lookups, Exim was not diagnosing an error if
2455 * or *@ was used with a query-style lookup.
2457 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2459 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2460 long ago, but noone interested enough thought of it. Let's just say that
2461 the "1.1" means that there are some new functions that weren't there at
2462 some point in the past.
2464 PH/51 Error processing for expansion failure of helo_data from an smtp
2465 transport during callout processing was broken.
2467 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2468 tested/used via the -bh/-bhc/-bs options.
2470 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2471 bug, fixed in subsequent PCRE releases).
2473 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2474 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2476 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2482 SC/01 Use a glob alias rather than an array ref in eximstats generated
2483 parser. This improves both readability and performance.
2485 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2486 Don't display local sender or destination tables in eximstats unless
2487 there is data to show.
2488 Added average volumes into the eximstats top table text output.
2490 SC/03 Collect data on the number of addresses (recipients) as well
2491 as the number of messages in eximstats.
2493 TF/01 Correct an error in the documentation for the redirect router. Exim
2494 does (usually) call initgroups() when daemonizing.
2496 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2497 with consistent privilege compared to when running as a daemon.
2499 TF/03 Note in the spec that $authenticated_id is not set for local
2500 submissions from trusted users.
2502 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2503 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2505 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2506 by adding some example configuration directives to the default
2507 configuration file. A little bit of work is required to uncomment the
2508 directives and define how usernames and passwords are checked, but
2509 there is now a framework to start from.
2511 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2512 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2513 without this. I don't know how relevant this is to other LDAP libraries.
2515 PH/02 Add the verb name to the "unknown ACL verb" error.
2517 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2519 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2521 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2522 directory not expanded when it should be if an expanded home directory
2523 was set for the address (which is overridden by the transport).
2525 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2528 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2529 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2530 because it is too late at that time, and has no effect.
2532 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2533 security issue with \' (bugzilla #107). I could not use the
2534 PQescapeStringConn() function, because it needs a PGconn value as one of
2537 PH/08 When testing addresses using -bt, indicate those final addresses that
2538 are duplicates that would not cause an additional delivery. At least one
2539 person was confused, thinking that -bt output corresponded to deliveries.
2540 (Suppressing duplicates isn't a good idea as you lose the information
2541 about possibly different redirections that led to the duplicates.)
2543 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2544 systems where poll() doesn't work, in particular OS X.
2546 PH/10 Added more information to debugging output for retry time not reached.
2548 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2549 operations in malware.c.
2551 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2554 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2555 syslog_duplication set false, log lines that would normally be written
2556 both the the main log and to the reject log were not written to syslog at
2559 PH/14 In the default configuration, change the use of "message" in ACL warn
2560 statements to "add_header".
2562 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2563 not followed by a command (e.g. "seen endif").
2565 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2566 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2569 PH/17 Added extra conditions to the default value of delay_warning_condition
2573 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2574 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2575 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2578 The Auto-Submitted: and various List- headers are standardised, whereas I
2579 don't think Precedence: ever was.
2581 PH/18 Refactored debugging code in route_finduser() to show more information,
2582 in particular, the error code if getpwnam() issues one.
2584 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2585 This is apparently needed in addition to the PH/07 change above to avoid
2586 any possible encoding problems.
2588 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2589 but not after initializing Perl.
2591 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2592 output them only if debugging. By default they are written stderr,
2593 apparently, which is not desirable.
2595 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2598 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2601 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2603 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2604 authenticated or an ident call has been made. Suppress the default
2605 values for $authenticated_id and $authenticated_sender (but permit -oMai
2606 and -oMas) when testing with -bh.
2608 PH/24 Re-jigged the order of the tests in the default configuration so that the
2609 tests for valid domains and recipients precede the DNS black list and CSA
2610 tests, on the grounds that those ones are more expensive.
2612 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2613 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2614 This bug exists in every version of Exim that I still have, right back to
2617 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2618 However, an attempt to turn on case-sensitivity in a regex key by
2619 including (?-i) didn't work because the subject string was already
2620 lowercased, and the effects were non-intuitive. It turns out that a
2621 one-line patch can be used to allow (?-i) to work as expected.
2627 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2628 other effects) broke the use of negated acl sub-conditions.
2630 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2633 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2634 "Deny" causes Exim to reject the incoming connection with a 554 error.
2635 Unfortunately, if there is a major crisis, such as a disk failure,
2636 tcp-wrappers gives "deny", whereas what one would like would be some
2637 kind of temporary error. A kludge has been added to help with this.
2638 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2639 554 error is used if errno is still zero or contains ENOENT (which occurs
2640 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2643 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2645 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2646 errors. Otherwise a message that provokes a temporary error (when other
2647 messages do not) can cause a whole host to time out.
2649 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2650 addresses were routed directly to files or pipes from a redirect router.
2651 File deliveries just didn't batch; pipe deliveries might have suffered
2654 PH/06 A failure to get a lock for a hints database would erroneously always say
2655 "Failed to get write lock", even when it was really a read lock.
2657 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2658 of 0600. This has been changed to use the value of the lockfile_mode
2659 option (which defaults to 0600).
2661 PH/08 Applied small patch from the Sieve maintainer.
2663 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2664 folder from quota calculations, a direct delivery into this folder messed
2665 up the contents of the maildirsize file. This was because the regex was
2666 used only to exclude .Trash (or whatever) when the size of the mailbox
2667 was calculated. There was no check that a delivery was happening into an
2668 excluded directory. This bug has been fixed by ignoring all quota
2669 processing for deliveries into excluded directories.
2671 PH/10 Added the maildirfolder_create_regex option to appendfile.
2677 PH/01 The code for finding all the local interface addresses on a FreeBSD
2678 system running IPv6 was broken. This may well have applied to all BSD
2679 systems, as well as to others that have similar system calls. The broken
2680 code found IPv4 interfaces correctly, but gave incorrect values for the
2681 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2682 that it would not match correctly against @[] and not recognize the IPv6
2685 PH/02 The ipliteral router was not recognizing addresses of the form user@
2686 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2688 PH/03 Added disable_ipv6.
2690 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2691 decoded form, because it is most often used to construct To: headers
2692 lines in autoreplies, and the decoded form may well be syntactically
2693 invalid. However, $reply_address has leading white space removed, and all
2694 newlines turned into spaces so that the autoreply transport does not
2697 PH/05 If group was specified without a user on a router, and no group or user
2698 was specified on a transport, the group from the router was ignored.
2700 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2701 for visible compile-time settings that can be used to change these
2702 numbers, for those that want even more. Backwards compatibility with old
2703 spool files has been maintained. However, going back to a previous Exim
2704 release will lost any variables that are in spool files.
2706 PH/07 Two small changes when running in the test harness: increase delay when
2707 passing a TCP/IP connection to a new process, in case the original
2708 process has to generate a bounce, and remove special handling of
2709 127.0.0.2 (sic), which is no longer necessary.
2711 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2712 be the same on different OS.
2714 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2717 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2718 whether --show-vars was specified or not
2720 JJ/02 exipick: Added support for new ACL variable spool format introduced
2723 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2724 syntactically invalid From: or Reply-to: line, and a filter used this to
2725 generate an autoreply, and therefore failed to obtain an address for the
2726 autoreply, Exim could try to deliver to a non-existent relative file
2727 name, causing unrelated and misleading errors. What now happens is that
2728 it logs this as a hard delivery error, but does not attempt to create a
2731 PH/11 The exinext utility has a -C option for testing purposes, but although
2732 the given file was scanned by exinext itself; it wasn't being passed on
2733 when Exim was called.
2735 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2736 an end-of-file indication when reading a command response.
2738 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2739 compiled. In many other places in Exim, IPv6 addresses are always
2740 recognized, so I have changed this. It also means that IPv4 domain
2741 literals of the form [IPV4:n.n.n.n] are now always recognized.
2743 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2744 used if the router is not running as root, for example, when verifying at
2745 ACL time, or when using -bh. The debugging output from this situation was
2746 non-existent - all you got was a failure to exec. I have made two
2749 (a) Failures to set uid/gid, the current directory, or a process leader
2750 in a subprocess such as that created by queryprogram now generate
2751 suitable debugging ouput when -d is set.
2753 (b) The queryprogram router detects when it is not running as root,
2754 outputs suitable debugging information if -d is set, and then runs
2755 the subprocess without attempting to change uid/gid.
2757 PH/15 Minor change to Makefile for building test_host (undocumented testing
2760 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2761 additional section of a DNS packet that returns MX or SRV records.
2762 Instead, it always explicitly searches for A/AAAA records. This avoids
2763 major problems that occur when a DNS server includes only records of one
2764 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2765 fixed another bug: if SRV records were looked up and the corresponding
2766 address records were *not* found in the additional section, the port
2767 values from the SRV records were lost.
2769 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2770 using the correct key (the original address) when searching the retry
2771 rules in order to find which one to use for generating the retry hint.
2773 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2774 adding the default one. Similarly, if it contains a Reply-To: header, the
2775 errors_reply_to option, if set, is not used.
2777 PH/19 When calculating a retry time, Exim used to measure the "time since
2778 failure" by looking at the "first failed" field in the retry record. Now
2779 it does not use this if it is later than than the arrival time of the
2780 message. Instead it uses the arrival time. This makes for better
2781 behaviour in cases where some deliveries succeed, thus re-setting the
2782 "first failed" field. An example is a quota failure for a huge message
2783 when small messages continue to be delivered. Without this change, the
2784 "time since failure" will always be short, possible causing more frequent
2785 delivery attempts for the huge message than are intended.
2786 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2788 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2789 $1, $2, $3) because the numerical variables can be reset during some
2790 expansion items (e.g. "match"), thereby losing the authentication data.
2792 PH/21 Make -bV show the size of off_t variables so that the test suite can
2793 decide whether to run tests for quotas > 2G.
2795 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2796 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2797 filecount value is greater than 2G or if a quota value is greater than 2G
2798 on a system where the size of off_t is not greater than 4, a panic error
2801 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2802 never match. The debug and -bh output now contains an explicit error
2803 message indicating a malformed IPv4 address or mask.
2805 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2806 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2807 PH/23 above applies.
2809 PH/25 Do not write to syslog when running in the test harness. The only
2810 occasion when this arises is a failure to open the main or panic logs
2811 (for which there is an explicit test).
2813 PH/26 Added the /no_tell option to "control=freeze".
2815 PH/27 If a host name lookup failed very early in a connection, for example, if
2816 the IP address matched host_lookup and the reverse lookup yielded a name
2817 that did not have a forward lookup, an error message of the form "no IP
2818 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2819 could be logged. Now it outputs the IP address instead of "NULL".
2821 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2822 allows the sender and the authenticated sender to be set when
2823 submitting a message from within Exim. Since child_open_exim() is
2824 documented for local_scan(), the new function should be too.
2826 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2827 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2828 results in an empty string is now treated as unset.
2830 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2832 PH/31 Added sender_verify_fail logging option.
2834 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2835 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2836 tidied the source and removed it altogether.
2838 PH/33 When a queue run was abandoned because the load average was too high, a
2839 log line was always written; now it is written only if the queue_run log
2840 selector is set. In addition, the log line for abandonment now contains
2841 information about the queue run such as the pid. This is always present
2842 in "start" and "stop" lines but was omitted from the "abandon" line.
2844 PH/34 Omit spaces between a header name and the colon in the error message that
2845 is given when verify = headers_syntax fails (if there are lots of them,
2846 the message gets confusing).
2848 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2849 names, as there are now some PTR records that contain slashes. This check
2850 is only to protect against broken name servers that fall over on strange
2851 characters, so the fact that it applies to all lookups doesn't matter.
2853 PH/36 Now that the new test suite is complete, we can remove some of the
2854 special code in Exim that was needed for the old test suite. For example,
2855 sorting DNS records because real resolvers return them in an arbitrary
2856 order. The new test suite's fake resolver always returns records in the
2859 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2860 bounces) except when queue_only is set, to avoid logging races between
2861 the different processes.
2863 PH/38 Panic-die if .include specifies a non-absolute path.
2865 PH/39 A tweak to the "H" retry rule from its user.
2867 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2868 a label. They prevented compilation on older perls.
2870 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2871 a warning to be raised on newish perls.
2873 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2874 on queue. Changes to match documented behaviour of showing count of
2875 messages matching specified criteria.
2877 PH/40 Changed the default ident timeout from 30s to 5s.
2879 PH/41 Added support for the use of login_cap features, on those BSD systems
2880 that have them, for controlling the resources used by pipe deliveries.
2882 PH/42 The content-scanning code uses fopen() to create files in which to put
2883 message data. Previously it was not paying any attention to the mode of
2884 the files. Exim runs with umask(0) because the rest of the code creates
2885 files with open(), and sets the required mode explicitly. Thus, these
2886 files were ending up world-writeable. This was not a big issue, because,
2887 being within the spool directory, they were not world-accessible. I have
2888 created a function called modefopen, which takes an additional mode
2889 argument. It sets umask(777), creates the file, chmods it to the required
2890 mode, then resets the umask. All the relevant calls to fopen() in the
2891 content scanning code have been changed to use this function.
2893 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2894 to 24 hours. This avoids potential overflow problems when processing G
2895 and H retry rules. I suspect nobody ever tinkers with this value.
2897 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2899 PH/45 When the plaintext authenticator is running as a client, the server's
2900 challenges are checked to ensure they are valid base64 strings. By
2901 default, the authentication attempt is cancelled if an invalid string is
2902 received. Setting client_ignore_invalid_base64 true ignores these errors.
2903 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2904 they are received. Thus, the responses can be made to depend on the
2905 challenges. If an invalid string is ignored, an empty string is placed in
2908 PH/46 Messages that are created by the autoreply transport now contains a
2909 References: header, in accordance with RFCs 2822 and 3834.
2911 PH/47 Added authenticated_sender_force to the smtp transport.
2913 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2915 PH/49 Installed latest patch from the Sieve maintainer.
2917 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2918 was also set, the appendfile transport was unnecessarily scanning a
2919 directory of message files (e.g. for maildir delivery) to find the count
2920 of files (along with the size), even though it did not need this
2921 information. It now does the scan only if it needs to find either the
2922 size of the count of files.
2924 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2926 PH/52 Two bugs concerned with error handling when the smtp transport is
2929 (i) Exim was not creating retry information for temporary errors given
2930 for individual recipients after the DATA command when the smtp transport
2931 was used in LMTP mode. This meant that they could be retried too
2932 frequently, and not timed out correctly.
2934 (ii) Exim was setting the flag that allows error details to be returned
2935 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2936 recipients that were returned after the DATA command.
2938 PH/53 This is related to PH/52, but is more general: for any failing address,
2939 when detailed error information was permitted to be returned to the
2940 sender, but the error was temporary, then after the final timeout, only
2941 "retry timeout exceeded" was returned. Now it returns the full error as
2942 well as "retry timeout exceeded".
2944 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2945 do this, and (what is worse) MTAs that accept it.
2947 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2948 will now be deprecated.
2950 PH/56 New os.c-cygwin from the Cygwin maintainer.
2952 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2953 formats (previously only available in exim formats via -bpr, -bpru,
2954 and -bpra. Now also available in native and exiqgrep formats)
2956 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2957 with very large, slow to parse queues
2959 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2961 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2963 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2964 responses to authentication challenges, though it was showing the
2965 challenges; (ii) I've removed the CR characters from the debug output for
2968 PH/58 Allow for the insertion of a newline as well as a space when a string
2969 is turned into more than one encoded-word during RFC 2047 encoding. The
2970 Sieve code now uses this.
2972 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2973 data_4xx, lost_connection, tls_required.
2975 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2976 message was being sent as an SMTP response.
2978 PH/61 Add -l and -k options to exicyclog.
2980 PH/62 When verifying, if an address was redirected to one new address, so that
2981 verification continued, and the new address failed or deferred after
2982 having set something in $address_data, the value of $address_data was not
2983 passed back to the ACL. This was different to the case when no
2984 redirection occurred. The value is now passed back in both cases.
2986 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2987 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2988 use login_cap.h, so on its own it isn't the distinguishing feature. The
2989 new name refers directly to the setclassresources() function.
2991 PH/65 Added configuration files for NetBSD3.
2993 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2995 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2996 is preferred over IPv4.
2998 PH/68 The bounce_return_message and bounce_return_body options were not being
2999 honoured for bounces generated during the reception of non-SMTP messages.
3000 In particular, this applied to messages rejected by the ACL. This bug has
3001 been fixed. However, if bounce_return_message is true and bounce_return_
3002 body is false, the headers that are returned for a non-SMTP message
3003 include only those that have been read before the error was detected.
3004 (In the case of an ACL rejection, they have all been read.)
3006 PH/69 The HTML version of the specification is now built in a directory called
3007 spec_html instead of spec.html, because the latter looks like a path with
3008 a MIME-type, and this confuses some software.
3010 PH/70 Catch two compiler warnings in sieve.c.
3012 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3013 function verify_get_ident() calls ip_connect() to connect a socket, but
3014 if the "connect()" function timed out, ip_connect() used to close the
3015 socket. However, verify_get_ident() also closes the socket later, and in
3016 between Exim writes to the log, which may get opened at this point. When
3017 the socket was closed in ip_connect(), the log could get the same file
3018 descriptor number as the socket. This naturally causes chaos. The fix is
3019 not to close the socket in ip_connect(); the socket should be closed by
3020 the function that creates it. There was only one place in the code where
3021 this was missing, in the iplookup router, which I don't think anybody now
3022 uses, but I've fixed it anyway.
3024 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3025 well as to direct DNS lookups. Otherwise the handling of names in host
3026 lists is inconsistent and therefore confusing.
3032 PH/01 Two changes to the default runtime configuration:
3034 (1) Move the checks for relay_from_hosts and authenticated clients from
3035 after to before the (commented out) DNS black list checks.
3037 (2) Add control=submission to the relay_from_hosts and authenticated
3038 clients checks, on the grounds that messages accepted by these
3039 statements are most likely to be submissions.
3041 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3043 (1) Generate an error if the third argument for the ${prvs expansion is
3046 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3049 (3) Reset the variables that are obtained from the first argument of
3050 ${prvscheck and used in the second argument before leaving the code,
3051 because their memory is reclaimed, so using them afterwards may do
3054 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3055 one (it's much easier than Tom thought :-).
3057 (5) Because of (4), we can now allow for the use of $prvscheck_result
3058 inside the third argument.
3060 PH/03 For some reason, the default setting of PATH when running a command from
3061 a pipe transport was just "/usr/bin". I have changed it to
3064 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3065 anything to be listed in the output from -bV.
3067 PH/05 When a filter generated an autoreply, the entire To: header line was
3068 quoted in the delivery log line, like this:
3070 => >A.N.Other <ano@some.domain> <original@ddress> ...
3072 This has been changed so that it extracts the operative address. There
3073 may be more than one such address. If so, they are comma-separated, like
3076 => >ano@some.domain,ona@other.domain <original@ddress> ...
3078 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3079 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3080 not being looked up in the rDNS to get a host name, Exim was showing the
3081 IP address twice in Received: lines, even though the IP addresses were
3082 identical. For example:
3084 Received: from [1.2.3.4] (helo=[1.2.3.4])
3086 However, if the real host name was known, it was omitting the HELO data
3087 if it matched the actual IP address. This has been tidied up so that it
3088 doesn't show the same IP address twice.
3090 PH/07 When both +timestamp and +memory debugging was on, the value given by
3091 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3092 called by the debug printing, thereby overwriting the timestamp buffer.
3093 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3095 PH/08 When the original message was included in an autoreply transport, it
3096 always said "this is a copy of the message, including all the headers",
3097 even if body_only or headers_only was set. It now gives an appropriate
3100 PH/09 Applied a patch from the Sieve maintainer which:
3102 o fixes some comments
3103 o adds the (disabled) notify extension core
3104 o adds some debug output for the result of if/elsif tests
3105 o points to the current vacation draft in the documentation
3106 and documents the missing references header update
3110 o fixes a bug in processing the envelope test (when testing
3111 multiple envelope elements, the last element determinted the
3114 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3115 Electronic Mail") by including:
3117 Auto-submitted: auto-generated
3119 in the messages that it generates (bounce messages and others, such as
3120 warnings). In the case of bounce messages for non-SMTP mesages, there was
3121 also a typo: it was using "Auto_submitted" (underscore instead of
3122 hyphen). Since every message generated by Exim is necessarily in response
3123 to another message, thes have all been changed to:
3125 Auto-Submitted: auto-replied
3127 in accordance with these statements in the RFC:
3129 The auto-replied keyword:
3131 - SHOULD be used on messages sent in direct response to another
3132 message by an automatic process,
3134 - MUST NOT be used on manually-generated messages,
3136 - MAY be used on Delivery Status Notifications (DSNs) and Message
3137 Disposition Notifications (MDNs),
3139 - MUST NOT be used on messages generated by automatic or periodic
3140 processes, except for messages which are automatic responses to
3143 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3144 to the default Received: header definition.
3146 PH/12 Added log selector acl_warn_skipped (default on).
3148 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3149 variables because (a) they are in the wrong storage pool and (b) even if
3150 they were copied, it wouldn't work properly because of the caching.
3152 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3153 checking when decoding. Apparently there are clients that generate
3154 overlong encoded strings. Why am I not surprised?
3156 PH/15 If the first argument of "${if match_address" was not empty, but did not
3157 contain an "@" character, Exim crashed. Now it writes a panic log message
3158 and treats the condition as false.
3160 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3162 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3163 extension "envelope-auth". The code is finished and in agreement with
3164 other implementations, but there is no documentation so far and in fact,
3165 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3166 not changing the active code.
3168 Print executed "if" and "elsif" statements when debugging is used. This
3169 helps a great deal to understand what a filter does.
3171 Document more things not specified clearly in RFC3028. I had all this
3172 sorted out, when out of a sudden new issues came to my mind. Oops."
3174 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3177 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3178 canonical form (as documented). However, after a host name lookup from
3179 the IP address, check_host() was doing a simple string comparison with
3180 addresses acquired from the DNS when checking that the found name did
3181 have the original IP as one of its addresses. Since any found IPv6
3182 addresses are likely to be in abbreviated form, the comparison could
3183 fail. Luckily, there already exists a function for doing the comparison
3184 by converting both addresses to binary, so now that is used instead of
3185 the text comparison.
3187 PH/20 There was another similar case to PH/19, when a complete host name was
3188 given in a host list; looking up its IP address could give an abbreviated
3189 form, whereas the current host's name might or might not be abbreviated.
3190 The same fix has been applied.
3196 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3197 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3200 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3201 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3203 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3205 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3206 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3207 Also, for "Auto-Submitted", treat anything other than "no" as
3208 non-personal, in accordance with RFC 3834. (Previously it treated
3209 anything starting "auto-" as non-personal.)
3211 TF/01 The control=submission/name=... option had a problem with syntax
3212 errors if the name included a slash character. The /name= option
3213 now slurps the rest of the string, so it can include any characters
3214 but it must come last in the list of options (after /sender_retain
3217 PH/05 Some modifications to the interface to the fake nameserver for the new
3225 TK/01 Added the "success_on_redirect" address verification option. See
3226 NewStuff for rationale and an example.
3228 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3230 PH/02 Patch to exigrep to allow it to work on syslog lines.
3232 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3233 fread() to skip over the body file's header line, because in Cygwin the
3234 header line is locked and is inaccessible.
3236 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3237 co-exist for some time) to make it clear that it is the Exim ID that is
3238 referenced, not the Message-ID: header line.
3240 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3241 string_format() function, because snprintf() does not exist on all
3244 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3245 ${stat: expansion item.
3247 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3248 protocol synchronization error", to keep the pedants happy.
3250 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3251 well as for IRIX systems, when gcc is being used. See the host.c source
3254 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3256 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3259 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3260 transport and to the smtp transport in LMTP mode.
3262 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3264 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3265 run a filter in a subprocess. This could lead to confusion in subsequent
3266 lookups in the parent process. There should also be a search_tidyup() at
3267 the end of the subprocess.
3269 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3270 only if the host matched helo_try_verify_hosts, which caused the
3271 verification to occur when the EHLO/HELO command was issued. The ACL just
3272 tested the remembered result. Now, if a previous verification attempt has
3273 not happened, "verify = helo" does it there and then.
3275 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3277 TK/03 Fix log output including CR from clamd.
3279 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3280 exist provoked a memory error which could cause a segfault.
3282 PH/15 Installed PCRE 6.2
3284 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3286 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3287 of the problem. Specifically, suggested +O2 rather than +O1 for the
3290 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3292 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3293 record, the port was not correctly logged when the outgoing_port log
3294 selector was set (it logged the transort's default port).
3296 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3297 fallback_hosts, and "hosts" in the smtp transport.
3299 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3300 host errors such as "Connection refused".
3302 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3303 authentication with radiusclient 0.4.9:
3305 - Error returned from rc_read_config was caught wrongly
3306 - Username/password not passed on to radius server due to wrong length.
3308 The presumption is that some radiusclient API changes for 4.51/PH/17
3309 were not taken care of correctly. The code is still untested by me (my
3310 Linux distribution still has 0.3.2 of radiusclient), but it was
3311 contributed by a Radius user.
3313 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3314 expanding the "port" option of the smtp transport.
3316 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3317 while reading a MIME header. Thanks to Tom Hughes for a patch.
3319 PH/24 Include config.h inside local_scan.h so that configuration settings are
3322 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3323 that in an ACL for RCPT (for example), you can examine exactly what was
3326 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3327 commands, but it was not correctly comparing the address with the actual
3328 client host address. Thus, it would show the EHLO address in Received:
3329 header lines when this was not necessary.
3331 PH/27 Added the % operator to ${eval:}.
3333 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3334 it should be ignoring failures (because with -C, for example, it has lost
3335 privilege). It wasn't ignoring creation failures other than "already
3338 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3341 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3342 because an input line was too long, either on its own, or by virtue of
3343 too many continuations, the temporary file was not being removed, and the
3344 return code was incorrect.
3346 PH/31 Missing "BOOL" in function definition in filtertest.c.
3348 PH/32 Applied Sieve patches from the maintainer.
3350 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3352 PH/33 Added "verify = not_blind".
3354 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3355 Local/Makefile (with some defaults set). These are used in built scripts
3356 such as exicyclog, but they have never been used in the exim_install
3357 script (though there are many overriding facilities there). I have
3358 arranged that the exim_install script now takes note of these two
3361 PH/35 Installed configuration files for Dragonfly.
3363 PH/36 When a locally submitted message by a trusted user did not contain a
3364 From: header, and the sender address was obtained from -f or from an SMTP
3365 MAIL command, and the trusted user did not use -F to supply a sender
3366 name, $originator_name was incorrectly used when constructing a From:
3367 header. Furthermore, $originator_name was used for submission mode
3368 messages from external hosts without From: headers in a similar way,
3369 which is clearly wrong.
3371 PH/37 Added control=suppress_local_fixups.
3373 PH/38 When log_selector = +received_sender was set, and the addition of the
3374 sender made the log line's construction buffer exactly full, or one byte
3375 less than full, an overflow happened when the terminating "\n" was
3378 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3379 when the result of a list match is failure because a DNS lookup failed.
3381 PH/40 RM_COMMAND is now used in the building process.
3383 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3384 the "build-* directories that it finds.
3386 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3387 address in a domain literal was a prefix of an interface address.
3389 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3390 when verifying a sender address, unless rewrite_headers is false.
3392 PH/44 Wrote a long comment about why errors_to addresses are verified as
3393 recipients, not senders.
3395 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3396 the ratelimit ACL was added.
3398 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3400 PH/46 Added extra information about PostgreSQL errors to the error string.
3402 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3403 avoiding the need to install special zones in a real server. This is
3404 backwards compatible; if it can't find the fake resolver, it drops back.
3405 Thus, both old and new test suites can be run.
3407 TF/02 Added util/ratelimit.pl
3409 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3410 clock is set back in time.
3412 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3413 Candler <B.Candler@pobox.com>.
3415 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3416 OK for addresses that are the result of redirections.
3418 PH/48 A number of further additions for the benefit of the new test suite,
3419 including a fake gethostbyname() that interfaces to the fake DNS resolver
3422 TF/06 The fix for widen_domains has also been applied to qualify_single and
3423 search_parents which are the other dnslookup options that can cause
3426 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3429 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3431 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3432 service" if it encountered an MX record with an empty target hostname.
3433 The message is now "an MX or SRV record indicated no SMTP service".
3435 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3436 if the DNS of the sending site is misconfigured. This is quite a
3437 common situation. This change restores the behaviour of treating a
3438 helo verification defer as a failure.
3440 PH/51 If self=fail was set on a router, the bounce message did not include the
3441 actual error message.
3447 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3449 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3450 command itself ended in error, the underlying message about the transport
3451 filter timeout was being overwritten with the pipe command error. Now the
3452 underlying error message should be appended to the second error message.
3454 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3456 PH/02 Reduce the amount of output that "make" produces by default. Full output
3457 can still be requested.
3459 PH/03 The warning log line about a condition test deferring for a "warn" verb
3460 was being output only once per connection, rather than after each
3461 occurrence (because it was using the same function as for successful
3462 "warn" verbs). This seems wrong, so I have changed it.
3464 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3465 it should not have, which might have caused a crash in the right
3466 circumstances, but probably never did.
3468 PH/04 Installed a modified version of Tony Finch's patch to make submission
3469 mode fix the return path as well as the Sender: header line, and to
3470 add a /name= option so that you can make the user's friendly name appear
3473 TF/03 Added the control = fakedefer ACL modifier.
3475 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3476 Mark Lowes for thorough testing.
3478 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3480 TK/03 Merged latest SRS patch from Miles Wilton.
3482 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3483 with the definition in sysexits.h (which is #included earlier).
3484 Fortunately, Exim does not actually use EX_OK. The code used to try to
3485 preserve the sysexits.h value, by assumimg that macro definitions were
3486 scanned for macro replacements. I have been disabused of this notion,
3487 so now the code just undefines EX_OK before #including unistd.h.
3489 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3490 in the smtp transport. When a block could not be written in a single
3491 write() function, the timeout was being re-applied to each part-write.
3492 This seems wrong - if the receiver was accepting one byte at a time it
3493 would take for ever. The timeout is now adjusted when this happens. It
3494 doesn't have to be particularly precise.
3496 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3497 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3499 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3500 without a domain if the check to <postmaster@domain> fails.
3502 SC/01 Eximstats: added -xls and the ability to specify output files
3503 (patch written by Frank Heydlauf).
3505 SC/02 Eximstats: use FileHandles for outputing results.
3507 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3509 SC/04 Eximstats: fixed display of large numbers with -nvr option
3511 SC/05 Eximstats: fixed merging of reports with empty tables.
3513 SC/06 Eximstats: added the -include_original_destination flag
3515 SC/07 Eximstats: removed tabs and trailing whitespace.
3517 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3519 TK/06 MBOX spool code: Add real "From " MBOX separator line
3520 so the .eml file is really in mbox format (even though
3521 most programs do not really care). Patch from Alex Miller.
3523 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3524 The latter is generated from $received_to and is only set if the
3525 message has one envelope recipient. SA can use these headers,
3526 obviously out-of-the-box. Patch from Alex Miller.
3528 PH/08 The ${def test on a variable was returning false if the variable's
3529 value was "0", contrary to what the specification has always said!
3530 The result should be true unless the variable is empty.
3532 PH/09 The syntax error of a character other than { following "${if
3533 def:variable_name" (after optional whitespace) was not being diagnosed.
3534 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3535 accidental colon was present, for example, could give incorrect results.
3537 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3538 result is used (not including appendfile, where other changes are about
3541 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3542 This involved changing a lot of size variables from int to off_t. It
3543 should work with maildirs and everything.
3545 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3546 spamd dying while we are connected to it.
3548 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3551 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3552 function for BDB 4.3.
3554 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3556 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3557 the sources for PCRE have been re-arranged and more files are now
3560 PH/15 The code I had for printing potentially long long variables in PH/11
3561 above was not the best (it lost precision). The length of off_t variables
3562 is now inspected at build time, and an appropriate printing format (%ld
3563 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3564 to be "long long int" or "long int". This is needed for the internal
3565 formatting function string_vformat().
3567 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3568 the configuration file to be ":syslog", then the script "guesses" where
3569 the logs files are, rather than using the compiled in default. In our
3570 case the guess is not the same as the compiled default, so the script
3571 suddenly stopped working when I started to use syslog. The patch checks
3572 to see if log_file_path is "". If so, it attempts to read it from exim
3573 with no configuration file to get the compiled in version, before it
3574 falls back to the previous guessing code."
3576 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3577 implementing BATV in an Exim configuration. See NewStuff for the gory
3580 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3581 Makefile that are specific to HP-UX.
3583 PH/18 If the "use_postmaster" option was set for a recipient callout together
3584 with the "random" option, the postmaster address was used as the MAIL
3585 FROM address for the random test, but not for the subsequent recipient
3586 test. It is now used for both.
3588 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3589 patch removes a few documentation additions to RFC 3028, because the
3590 latest draft now contains them. It adds the new en;ascii-case comparator
3591 and a new error check for 8bit text in MIME parts. Comparator and
3592 require names are now matched exactly. I enabled the subaddress
3593 extension, but it is not well tested yet (read: it works for me)."
3595 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3596 rework some of the code of TK/09 above to avoid the hardwired use of
3597 "%lld" and "long long". Replaced the call to snprintf() with a call to
3600 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3601 records point to non-existent hosts", "retry timeout exceeded", and
3602 "retry time not reached for any host after a long failure period".
3604 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3605 experimental DomainKeys support:
3607 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3608 (2) On an error such as an illegally used "control", the wrong name for
3609 the control was given.
3611 These problems did NOT occur unless DomainKeys support was compiled.
3613 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3615 PH/24 Added ${if match_ip condition.
3617 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3618 databases so that it will be absolutely obvious if a crash occurs in the
3619 DB library. This is a regular occurrence (often caused by mis-matched
3622 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3623 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3624 picked up on a user's system that detects such things. There doesn't seem
3625 to be a gcc warning option for this - only an attribute that has to be
3626 put on the function's prototype. It seems that in Fedora Core 4 they have
3627 set this on a number of new functions. No doubt there will be more in due
3630 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3631 specify a transport. However, if an address that was verified by such a
3632 router was the subject of a callout, Exim crashed because it tried to
3633 read the rcpt_include_affixes from the non-existent transport. Now it
3634 just assumes that the setting of that option is false. This bug was
3635 introduced by 4.51/PH/31.
3637 PH/28 Changed -d+all to exclude +memory, because that information is very
3638 rarely of interest, but it makes the output a lot bigger. People tend to
3639 do -d+all out of habit.
3641 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3642 code in os-type was giving problems when libc.so lives in lib64, like on
3645 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3646 aren't the modern standard, and it seems that some systems' include files
3647 don't always have them. Exim was already checking for some of the newer
3648 ones like T_AAAA, and defining it itself. I've added checks for all the
3649 record types that Exim uses.
3651 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3652 not automatically generating a new one, as it is supposed to. This
3653 prevented TLS from working. If the file did exist, but contained invalid
3654 data, a new version was generated, as expected. It was only the case of a
3655 non-existent file that was broken.
3657 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3658 with a change in libdomainkeys > 0.64.
3660 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3661 from DNS. If the selector record carries the flag, it now has
3662 precedence over the domain-wide flag.
3664 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3666 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3667 the use of a port name that isn't defined in /etc/services) occurred, the
3668 message was deferred as in a normal delivery, and thus remained on the
3669 spool, instead of being failed because of the mua_wrapper setting. This
3670 is now fixed, and I tidied up some of the mua_wrapper messages at the
3673 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3674 the messages in a hash of arrays rather than using individual hashes.
3675 This is a bit cleaner and results in dramatic memory savings, albeit
3676 at a slight CPU cost.
3678 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3679 as requested by Marc Sherman.
3681 SC/10 Eximstats: added histograms for user specified patterns as requested
3684 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3686 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3687 fopen() in the content-scanning modules that did not already have it.
3693 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3694 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3696 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3698 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3700 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3701 to test Sieve filters that use "vacation".
3703 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3704 that changes the way the GnuTLS parameters are stored in the cache file.
3705 The new format can be generated externally. For backward compatibility,
3706 if the data in the cache doesn't make sense, Exim assumes it has read an
3707 old-format file, and it generates new data and writes a new file. This
3708 means that you can't go back to an older release without removing the
3711 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3712 work if there are any delivery delays because "one_time" forces the
3713 parent to be marked "delivered", so its unseen clone is never tried
3714 again. For this reason, Exim now forbids the simultaneous setting of
3717 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3718 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3719 entry if you want to know the details. The fix, however, neglected to
3720 consider the case when local delivery batching is involved. The test for
3721 "previously delivered" was not happening when checking to see if an
3722 address could be batched with a previous (undelivered) one; under
3723 certain circumstances this could lead to multiple deliveries to the same
3726 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3727 in its include files, and this causes problems building Exim.
3729 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3730 header_syntax) but Exim was just ignoring anything given after a slash.
3731 In particular, this caused confusion with an attempt to use "verify =
3732 reverse_host_lookup/defer_ok". An error is now given when options are
3733 supplied for verify items that do not have them. (Maybe reverse_host_
3734 lookup should have a defer_ok option, but that's a different point.)
3736 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3737 defined by RFC 821) to 2048, because there were problems with some AUTH
3738 commands, and RFC 1869 says the size should be increased for extended
3739 SMTP commands that take arguments.
3741 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3744 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3745 "unknown" error; now it says that the functionality isn't in the binary.
3747 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3748 an address' error message when a string expansion fails (syntax or
3749 whatever). Otherwise the password may appear in the log. Following change
3750 PH/42 below, there is no longer a chance of it appearing in a bounce
3753 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3755 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3756 of its addresses was ever tried. (Bugzilla bug #2.)
3758 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3759 the result incorrectly in the debug output. (It correctly added a newline
3760 to what was transported.)
3762 TF/01 Added $received_time.
3764 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3765 commented out examples of how to interface to a virus scanner and to
3766 SpamAssassin. Also added commented examples of av_scanner and
3767 spamd_address settings.
3769 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3770 and controls are allowed in which ACLs. There were a couple of minor
3771 errors. Some of the entries in the conditions table (which is a table of
3772 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3773 negation of where the condition IS allowed.
3775 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3777 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3778 header file does not have a version number, so I've had to invent a new
3779 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3780 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3781 radiusclient), but it was contributed by a Radius user.
3783 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3784 files or directories, for OpenSSL.
3786 PH/19 When an Exim process that is running as root has to create an Exim log
3787 file, it does so in a subprocess that runs as exim:exim so as to get the
3788 ownership right at creation (otherwise, other Exim processes might see
3789 the file with the wrong ownership). There was no test for failure of this
3790 fork() call, which would lead to the process getting stuck as it waited
3791 for a non-existent subprocess. Forks do occasionally fail when resources
3792 run out. I reviewed all the other calls to fork(); they all seem to check
3795 PH/20 When checking for unexpected SMTP input at connect time (before writing
3796 the banner), Exim was not dealing correctly with a non-positive return
3797 from the read() function. If the client had disconnected by this time,
3798 the result was a log entry for a synchronization error with an empty
3799 string after "input=" when read() returned zero. If read() returned -1
3800 (an event I could not check), uninitialized data bytes were printed.
3801 There were reports of junk text (parts of files, etc) appearing after
3804 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3806 PH/22 Added support for macro redefinition, and (re)definition in between
3807 driver and ACL definitions.
3809 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3810 forgetting to use the resulting value; it was using the unexpanded value.
3812 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3813 hadn't been configured. The fix is from Juergen Kreileder, who
3814 understands it better than I do:
3816 "Here's what I see happening with three configured cyrus_sasl
3817 authenticators configured (plain, login, cram-md5):
3819 On startup auth_cyrus_sasl_init() gets called for each of these.
3820 This means three calls to sasl_listmech() without a specified mech_list.
3821 => SASL tests which mechs of all available mechs actually work
3822 => three warnings about OTP not working
3823 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3825 With the patch, sasl_listmech() also gets called three times. But now
3826 SASL's mech_list option is set to the server_mech specified in the the
3827 authenticator. Or in other words, the answer from sasl_listmech()
3828 gets limited to just the mech you're testing for (which is different
3830 => the return list contains just 'plain' or 'login', 'cram-md5' or
3831 nothing depending on the value of ob->server_mech.
3833 I've just tested the patch: Authentication still works fine,
3834 unavailable mechs specified in the exim configuration are still
3835 caught, and the auth.log warnings about OTP are gone."
3837 PH/25 When debugging is enabled, the contents of the command line are added
3838 to the debugging output, even when log_selector=+arguments is not
3841 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3842 answer is "GNU", and only if the return is "GNU/something" is the answer
3845 PH/27 $acl_verify_message is now set immediately after the failure of a
3846 verification in an ACL, and so is available in subsequent modifiers. In
3847 particular, the message can be preserved by coding like this:
3849 warn !verify = sender
3850 set acl_m0 = $acl_verify_message
3852 Previously, $acl_verify_message was set only while expanding "message"
3853 and "log_message" when a very denied access.
3855 PH/28 Modified OS/os.c-Linux with
3857 -#ifndef OS_LOAD_AVERAGE
3858 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3860 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3861 nomenclature these days.)
3863 PH/29 Installed patch from the Sieve maintainer that adds the options
3864 sieve_useraddress and sieve_subaddress to the redirect router.
3866 PH/30 In these circumstances:
3867 . Two addresses routed to the same list of hosts;
3868 . First host does not offer TLS;
3869 . First host accepts first address;
3870 . First host gives temporary error to second address;
3871 . Second host offers TLS and a TLS session is established;
3872 . Second host accepts second address.
3873 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3874 and peerdn, if requested) that were in fact used only for the second
3877 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3878 attention to any local part prefix or suffix that was matched by the
3879 router that accepted the address. It now behaves in the same way as it
3880 does for delivery: the affixes are removed from the local part unless
3881 rcpt_include_affixes is set on the transport.
3883 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3884 timeout during the DATA phase of an incoming message.
3886 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3887 applied a patch sanctioned by the Sieve maintainer.
3889 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3890 the uid or gid is negative. A case of a negative gid caused this to be
3891 noticed. The fix allows for either to be negative.
3893 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3894 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3897 PH/36 The change PH/12 above was broken. Fixed it.
3899 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3900 the grounds that routing the same address twice would always produce the
3901 same answer. This might have been true once, but it is certainly no
3902 longer true now. Routing a child address may depend on the previous
3903 routing that produced that child. Some complicated redirection strategies
3904 went wrong when messages had multiple recipients, and made Exim's
3905 behaviour dependent on the order in which the addresses were given.
3907 I have moved the duplicate checking until after the routing is complete.
3908 Exim scans the addresses that are assigned to local and remote
3909 transports, and removes any duplicates. This means that more work will be
3910 done, as duplicates will always all be routed, but duplicates are
3911 presumably rare, so I don't expect this is of any significance.
3913 For deliveries to pipes, files, and autoreplies, the duplicate checking
3914 still happens during the routing process, since they are not going to be
3917 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3918 It corrects a timeout issue with spamd. This is Ian's comment: "The
3919 background is that sometimes spamd either never reads data from a
3920 connection it has accepted, or it never writes response data. The exiscan
3921 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3922 blindly assumes that writes won't block so it may never time out."
3924 PH/39 Allow G after quota size as well as K and M.
3926 PH/40 The value set for $authenticated_id in an authenticator may not contain
3927 binary zeroes or newlines because the value is written to log lines and
3928 to spool files. There was no check on this. Now the value is run through
3929 the string_printing() function so that such characters are converted to
3930 printable escape sequences.
3932 PH/41 $message_linecount is a new variable that contains the total number of
3933 lines in the message. Compare $body_linecount, which is the count for the
3936 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3937 bounce and delay warning messages, except in certain special cases, which
3940 (a) An SMTP error message from a remote host;
3941 (b) A message specified in a :fail: redirection;
3942 (c) A message specified in a "fail" command in a system filter;
3943 (d) A message specified in a FAIL return from the queryprogram router;
3944 (e) A message specified by the cannot_route_message router option.
3946 In these cases only, Exim does include the error details in bounce and
3947 warning messages. There are also a few cases where bland messages such
3948 as "unrouteable address" or "local delivery error" are given.
3950 PH/43 $value is now also set for the "else" part of a ${run expansion.
3952 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3953 being worked on, but at least Exim now implements the latest version to
3956 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3957 process to complete was treated as a delivery failure, a timeout while
3958 writing the message to the pipe was logged, but erroneously treated as a
3959 successful delivery. Such timeouts include transport filter timeouts. For
3960 consistency with the overall process timeout, these timeouts are now
3961 treated as errors, giving rise to delivery failures by default. However,
3962 there is now a new Boolean option for the pipe transport called
3963 timeout_defer, which, if set TRUE, converts the failures into defers for
3964 both kinds of timeout. A transport filter timeout is now identified in
3967 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3968 systems where "make" and "gmake" are different, calling "gmake" at top
3969 level broke things. I've arranged for the value of $(MAKE) to be passed
3970 from the Makefile to this script so that it can call the same version of
3974 A note about Exim versions 4.44 and 4.50
3975 ----------------------------------------
3977 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3978 changes of various kinds. As a consequence, a big documentation update was
3979 needed. This delayed the release for rather longer than seemed good, especially
3980 in the light of a couple of (minor) security issues. Therefore, the changes
3981 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3982 release. So 4.44 and 4.50 are in effect two different branches that both start
3985 I have left the 4.50 change log unchanged; it contains all the changes since
3986 4.43. The change log for 4.44 is below; many of its items are identical to
3987 those for 4.50. This seems to be the most sensible way to preserve the
3988 historical information.
3994 1. Minor wording change to the doc/README.SIEVE file.
3996 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3997 computation of the current number of files was incorrect.
3999 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4000 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4003 4. Give more explanation in the error message when the command for a transport
4004 filter fails to execute.
4006 5. There are several places where Exim runs a non-Exim command in a
4007 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4008 was being done only for the command run by the queryprogram router. It is
4009 now done for all such subprocesses. The other cases are: ${run, transport
4010 filters, and the commands run by the lmtp and pipe transports.
4012 6. Added CONFIGURE_GROUP build-time option.
4014 7. Some older OS have a limit of 256 on the maximum number of file
4015 descriptors. Exim was using setrlimit() to set 1000 as a large value
4016 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4017 systems. I've change it so that if it can't get 1000, it tries for 256.
4019 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4020 was an oversight, and furthermore, ever since the addition of extra
4021 controls (e.g. 4.43/32), the checks on when to allow different forms of
4022 "control" were broken. There should now be diagnostics for all cases when a
4023 control that does not make sense is encountered.
4025 9. Added the /retain_sender option to "control=submission".
4027 10. $recipients is now available in the predata ACL (oversight).
4029 11. Tidy the search cache before the fork to do a delivery from a message
4030 received from the command line. Otherwise the child will trigger a lookup
4031 failure and thereby defer the delivery if it tries to use (for example) a
4032 cached ldap connection that the parent has called unbind on.
4034 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4035 of $address_data from the recipient verification was clobbered by the
4036 sender verification.
4038 13. The value of address_data from a sender verification is now available in
4039 $sender_address_data in subsequent conditions in the ACL statement.
4041 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4043 15. Added a new option "connect=<time>" to callout options, to set a different
4046 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4047 was its contents. (It was OK if the option was not defined at all.)
4049 17. A "Completed" log line is now written for messages that are removed from
4050 the spool by the -Mrm option.
4052 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4053 information about exactly what failed.
4055 19. Added -dd to debug only the daemon process.
4057 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4058 handles timeouts, both on the server side and network timeouts. Renamed the
4059 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4061 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4062 It is now set to "smtps".
4064 22. $host_address is now set to the target address during the checking of
4065 ignore_target_hosts.
4067 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4068 being passed; this would have caused $sender_host_name to have been used if
4069 matching the list had actually called for a host name (not very likely,
4070 since this list is usually IP addresses). A host name is now passed as
4073 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4074 code that specifies a non-restarting handler (typically sigaction() in
4075 modern systems) in an attempt to fix a rare and obscure crash bug.
4077 25. Narrowed the window for a race in the daemon that could cause it to ignore
4078 SIGCHLD signals. This is not a major problem, because they are used only to
4079 wake it up if nothing else does.
4081 26. A malformed maildirsize file could cause Exim to calculate negative values
4082 for the mailbox size or file count. Odd effects could occur as a result.
4083 The maildirsize information is now recalculated if the size or filecount
4086 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4087 support for a long time. Removed HAVE_SYS_VFS_H.
4089 28. Installed the latest version of exipick from John Jetmore.
4091 29. In an address list, if the pattern was not a regular expression, an empty
4092 subject address (from a bounce message) matched only if the pattern was an
4093 empty string. Non-empty patterns were not even tested. This was the wrong
4094 because it is perfectly reasonable to use an empty address as part of a
4095 database query. An empty address is now tested by patterns that are
4096 lookups. However, all the other forms of pattern expect the subject to
4097 contain a local part and a domain, and therefore, for them, an empty
4098 address still always fails if the pattern is not itself empty.
4100 30. Exim went into a mad DNS loop when attempting to do a callout where the
4101 host was specified on an smtp transport, and looking it up yielded more
4102 than one IP address.
4104 31. Re-factored the code for checking spool and log partition space into a
4105 function that finds that data and another that does the check. The former
4106 is then used to implement four new variables: $spool_space, $log_space,
4107 $spool_inodes, and $log_inodes.
4109 32. The RFC2047 encoding function was originally intended for short strings
4110 such as real names; it was not keeping to the 75-character limit for
4111 encoded words that the RFC imposes. It now respects the limit, and
4112 generates multiple encoded words if necessary. To be on the safe side, I
4113 have increased the buffer size for the ${rfc2047: expansion operator from
4116 33. It is now permitted to omit both strings after an "if" condition; if the
4117 condition is true, the result is "true". As before, when the second string
4118 is omitted, a false condition yields an empty string. This makes it less
4119 cumbersome to write custom ACL and router conditions.
4121 34. Failure to deliver a bounce message always caused it to be frozen, even if
4122 there was an errors_to setting on the router. The errors_to setting is now
4125 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4126 canonical form (fully expanded) before being placed in
4127 $sender_host_address.
4129 36. The table in the code that translates DNS record types into text (T_A to
4130 "A" for instance) was missing entries for NS and CNAME. It is just possible
4131 that this could have caused confusion if both these types were looked up
4132 for the same domain, because the text type is used as part of Exim's
4133 per-process caching. But the chance of anyone hitting this buglet seems
4136 37. The dnsdb lookup has been extended in a number of ways.
4138 (1) There is a new type, "zns", which walks up the domain tree until it
4139 finds some nameserver records. It should be used with care.
4141 (2) There is a new type, "mxh", which is like "mx" except that it returns
4142 just the host names, not the priorities.
4144 (3) It is now possible to give a list of domains (or IP addresses) to be
4145 looked up. The behaviour when one of the lookups defers can be
4146 controlled by a keyword.
4148 (4) It is now possible to specify the separator character for use when
4149 multiple records are returned.
4151 38. The dnslists ACL condition has been extended: it is now possible to supply
4152 a list of IP addresses and/or domains to be looked up in a particular DNS
4155 39. Added log_selector=+queue_time_overall.
4157 40. When running the queue in the test harness, wait just a tad after forking a
4158 delivery process, to get repeatability of debugging output.
4160 41. Include certificate and key file names in error message when GnuTLS fails
4161 to set them up, because the GnuTLS error message doesn't include the name
4162 of the failing file when there is a problem reading it.
4164 42. Allow both -bf and -bF in the same test run.
4166 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4168 44. The "Exiscan patch" is now merged into the mainline Exim source.
4170 45. Sometimes the final signoff response after QUIT could fail to get
4171 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4172 < 0 before doing a fflush(). This bug looks as though it goes back to the
4173 introduction of TLS in release 3.20, but "sometimes" must have been rare
4174 because the tests only now provoked it.
4176 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4177 (this can affect the format of dates).
4179 47. exim_tidydb, when checking for the continued existence of a message for
4180 which it has found a message-specific retry record, was not finding
4181 messages that were in split spool directories. Consequently, it was
4182 deleting retry records that should have stayed in existence.
4184 48. Steve fixed some bugs in eximstats.
4186 49. The SPA authentication driver was not abandoning authentication and moving
4187 on to the next authenticator when an expansion was forced to fail,
4188 contradicting the general specification for all authenticators. Instead it
4189 was generating a temporary error. It now behaves as specified.
4191 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4192 (the order specifies the preference for clients). The order is now AES256,
4193 AES128, 3DES, ARCFOUR128.
4195 51. Small patch to Sieve code - explicitly set From: when generating an
4198 52. Exim crashed if a remote delivery caused a very long error message to be
4199 recorded - for instance if somebody sent an entire SpamAssassin report back
4200 as a large number of 550 error lines. This bug was coincidentally fixed by
4201 increasing the size of one of Exim's internal buffers (big_buffer) that
4202 happened as part of the Exiscan merge. However, to be on the safe side, I
4203 have made the code more robust (and fixed the comments that describe what
4206 53. Now that there can be additional text after "Completed" in log lines (if
4207 the queue_time_overall log selector is set), a one-byte patch to exigrep
4208 was needed to allow it to recognize "Completed" as not the last thing in
4211 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4212 patch that reportedly fixes this has been added. I am not expert enough to
4213 create a test for it. This is what the patch creator wrote:
4215 "I found a little strange behaviour of ldap code when working with
4216 Windows 2003 AD Domain, where users was placed in more than one
4217 Organization Units. When I tried to give exim partial DN, the exit code
4218 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4219 But simultaneously result of request was absolutely normal ldap result,
4220 so I produce this patch..."
4222 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4223 REFERENCE, so I have modified the code to exclude the patch when that macro
4226 55. Some experimental protocols are using DNS PTR records for new purposes. The
4227 keys for these records are domain names, not reversed IP addresses. The
4228 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4229 leaves it alone. Component reversal etc. now happens only for IP addresses.
4232 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4234 57. Double the size of the debug message buffer (to 2048) so that more of very
4235 long debug lines gets shown.
4237 58. The exicyclog utility now does better if the number of log files to keep
4238 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4240 59. Two changes related to the smtp_active_hostname option:
4242 (1) $smtp_active_hostname is now available as a variable.
4243 (2) The default for smtp_banner uses $smtp_active_hostname instead
4244 of $primary_hostname.
4246 60. The host_aton() function is supposed to be passed a string that is known
4247 to be a valid IP address. However, in the case of IPv6 addresses, it was
4248 not checking this. This is a hostage to fortune. Exim now panics and dies
4249 if the condition is not met. A case was found where this could be provoked
4250 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4251 components; fortuitously, this particular loophole had already been fixed
4252 by change 4.50/55 above.
4254 If there are any other similar loopholes, the new check in host_aton()
4255 itself should stop them being exploited. The report I received stated that
4256 data on the command line could provoke the exploit when Exim was running as
4257 exim, but did not say which command line option was involved. All I could
4258 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4259 running as the user.
4262 61. There was a buffer overflow vulnerability in the SPA authentication code
4263 (which came originally from the Samba project). I have added a test to the
4264 spa_base64_to_bits() function which I hope fixes it.
4267 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4268 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4270 63. The daemon start-up calls getloadavg() while still root for those OS that
4271 need the first call to be done as root, but it missed one case: when
4272 deliver_queue_load_max is set with deliver_drop_privilege. This is
4273 necessary for the benefit of the queue runner, because there is no re-exec
4274 when deliver_drop_privilege is set.
4276 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4277 This has been fixed.
4279 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4280 was in use, was not putting the data itself into the right store pool;
4281 consequently, it could be overwritten for a subsequent message in the same
4282 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4285 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4287 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4288 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4289 the function were treating the return as a boolean value, which happened to
4290 work because 0=false and not-0=true, but is not correct code.
4292 68. The host_aton() function was not handling scoped IPv6 addresses (those
4293 with, for example, "%eth0" on the end) correctly.
4295 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4296 negated items (that is, ~something) in unsigned ints. Some compilers
4297 apparently mutter when there is no cast.
4299 70. If an address verification called from an ACL failed, and did not produce a
4300 user-specific message (i.e. there was only a "system" message), nothing was
4301 put in $acl_verify_message. In this situation, it now puts the system
4304 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4305 session; change 4.31/43 added the unwanted input to the log line - except
4306 that it did not do this in the start of session case. It now does.
4308 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4309 This is wrong and can cause the other end to generate a synchronization
4310 error if it is another Exim or anything else that does the synchronization
4311 check. A QUIT command is no longer sent after a timeout.
4313 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4314 during host lookups.
4316 74. The defer_ok option of callout verification was not working if it was used
4317 when verifying addresses in header lines, that is, for this case:
4319 verify = header_sender/callout=defer_ok
4321 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4322 those file descriptors could be used for SMTP connections. If anything
4323 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4324 could be sent to the SMTP client, causing chaos. The daemon now opens
4325 stdin, stdout, and stderr to /dev/null when it puts itself into the
4328 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4329 log by default. The user can override this with suitable Perl magic.
4331 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4332 the log message when discard triggers, was not working for the DATA ACL or
4333 for the non-SMTP ACL.
4335 78. Error message wording change in sieve.c.
4337 79. If smtp_accept_max_per_host was set, the number of connections could be
4338 restricted to fewer than expected, because the daemon was trying to set up
4339 a new connection before checking whether the processes handling previous
4340 connections had finished. The check for completed processes is now done
4341 earlier. On busy systems, this bug wouldn't be noticed because something
4342 else would have woken the daemon, and it would have reaped the completed
4345 80. If a message was submitted locally by a user whose login name contained one
4346 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4347 It caused a spool format error. I have fixed the spool reading code. A
4348 related problem was that the "from" clause in the Received: line became
4349 illegal because of the space(s). It is now covered by ${quote_local_part.
4351 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4354 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4356 83. Patch from Sieve maintainer to fix unterminated string problem in
4357 "vacation" handling.
4359 84. Some minor changes to the Linux configuration files to help with other
4360 OS variants using glibc.
4362 85. One more patch for Sieve to update vacation handling to latest spec.
4365 ----------------------------------------------------
4366 See the note above about the 4.44 and 4.50 releases.
4367 ----------------------------------------------------
4373 1. Change 4.43/35 introduced a bug that caused file counts to be
4374 incorrectly computed when quota_filecount was set in an appendfile
4377 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4378 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4381 3. Give more explanation in the error message when the command for a transport
4382 filter fails to execute.
4384 4. There are several places where Exim runs a non-Exim command in a
4385 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4386 was being done only for the command run by the queryprogram router. It is
4387 now done for all such subprocesses. The other cases are: ${run, transport
4388 filters, and the commands run by the lmtp and pipe transports.
4390 5. Some older OS have a limit of 256 on the maximum number of file
4391 descriptors. Exim was using setrlimit() to set 1000 as a large value
4392 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4393 systems. I've change it so that if it can't get 1000, it tries for 256.
4395 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4396 was an oversight, and furthermore, ever since the addition of extra
4397 controls (e.g. 4.43/32), the checks on when to allow different forms of
4398 "control" were broken. There should now be diagnostics for all cases when a
4399 control that does not make sense is encountered.
4401 7. $recipients is now available in the predata ACL (oversight).
4403 8. Tidy the search cache before the fork to do a delivery from a message
4404 received from the command line. Otherwise the child will trigger a lookup
4405 failure and thereby defer the delivery if it tries to use (for example) a
4406 cached ldap connection that the parent has called unbind on.
4408 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4409 of $address_data from the recipient verification was clobbered by the
4410 sender verification.
4412 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4413 was its contents. (It was OK if the option was not defined at all.)
4415 11. A "Completed" log line is now written for messages that are removed from
4416 the spool by the -Mrm option.
4418 12. $host_address is now set to the target address during the checking of
4419 ignore_target_hosts.
4421 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4422 being passed; this would have caused $sender_host_name to have been used if
4423 matching the list had actually called for a host name (not very likely,
4424 since this list is usually IP addresses). A host name is now passed as
4427 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4428 code that specifies a non-restarting handler (typically sigaction() in
4429 modern systems) in an attempt to fix a rare and obscure crash bug.
4431 15. Narrowed the window for a race in the daemon that could cause it to ignore
4432 SIGCHLD signals. This is not a major problem, because they are used only to
4433 wake it up if nothing else does.
4435 16. A malformed maildirsize file could cause Exim to calculate negative values
4436 for the mailbox size or file count. Odd effects could occur as a result.
4437 The maildirsize information is now recalculated if the size or filecount
4440 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4441 support for a long time. Removed HAVE_SYS_VFS_H.
4443 18. Updated exipick to current release from John Jetmore.
4445 19. Allow an empty sender to be matched against a lookup in an address list.
4446 Previously the only cases considered were a regular expression, or an
4449 20. Exim went into a mad DNS lookup loop when doing a callout where the
4450 host was specified on the transport, if the DNS lookup yielded more than
4453 21. The RFC2047 encoding function was originally intended for short strings
4454 such as real names; it was not keeping to the 75-character limit for
4455 encoded words that the RFC imposes. It now respects the limit, and
4456 generates multiple encoded words if necessary. To be on the safe side, I
4457 have increased the buffer size for the ${rfc2047: expansion operator from
4460 22. Failure to deliver a bounce message always caused it to be frozen, even if
4461 there was an errors_to setting on the router. The errors_to setting is now
4464 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4465 canonical form (fully expanded) before being placed in
4466 $sender_host_address.
4468 24. Updated eximstats to version 1.33
4470 25. Include certificate and key file names in error message when GnuTLS fails
4471 to set them up, because the GnuTLS error message doesn't include the name
4472 of the failing file when there is a problem reading it.
4474 26. Expand error message when OpenSSL has problems setting up cert/key files.
4477 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4478 (this can affect the format of dates).
4480 28. exim_tidydb, when checking for the continued existence of a message for
4481 which it has found a message-specific retry record, was not finding
4482 messages that were in split spool directories. Consequently, it was
4483 deleting retry records that should have stayed in existence.
4485 29. eximstats updated to version 1.35
4486 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4487 1.35 - bugfix such that pie charts by volume are generated correctly
4489 30. The SPA authentication driver was not abandoning authentication and moving
4490 on to the next authenticator when an expansion was forced to fail,
4491 contradicting the general specification for all authenticators. Instead it
4492 was generating a temporary error. It now behaves as specified.
4494 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4495 (the order specifies the preference for clients). The order is now AES256,
4496 AES128, 3DES, ARCFOUR128.
4498 31. Small patch to Sieve code - explicitly set From: when generating an
4501 32. Exim crashed if a remote delivery caused a very long error message to be
4502 recorded - for instance if somebody sent an entire SpamAssassin report back
4503 as a large number of 550 error lines. This bug was coincidentally fixed by
4504 increasing the size of one of Exim's internal buffers (big_buffer) that
4505 happened as part of the Exiscan merge. However, to be on the safe side, I
4506 have made the code more robust (and fixed the comments that describe what
4509 33. Some experimental protocols are using DNS PTR records for new purposes. The
4510 keys for these records are domain names, not reversed IP addresses. The
4511 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4512 leaves it alone. Component reversal etc. now happens only for IP addresses.
4515 34. The host_aton() function is supposed to be passed a string that is known
4516 to be a valid IP address. However, in the case of IPv6 addresses, it was
4517 not checking this. This is a hostage to fortune. Exim now panics and dies
4518 if the condition is not met. A case was found where this could be provoked
4519 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4520 components; fortuitously, this particular loophole had already been fixed
4521 by change 4.50/55 or 4.44/33 above.
4523 If there are any other similar loopholes, the new check in host_aton()
4524 itself should stop them being exploited. The report I received stated that
4525 data on the command line could provoke the exploit when Exim was running as
4526 exim, but did not say which command line option was involved. All I could
4527 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4528 running as the user.
4531 35. There was a buffer overflow vulnerability in the SPA authentication code
4532 (which came originally from the Samba project). I have added a test to the
4533 spa_base64_to_bits() function which I hope fixes it.
4536 36. The daemon start-up calls getloadavg() while still root for those OS that
4537 need the first call to be done as root, but it missed one case: when
4538 deliver_queue_load_max is set with deliver_drop_privilege. This is
4539 necessary for the benefit of the queue runner, because there is no re-exec
4540 when deliver_drop_privilege is set.
4542 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4543 was in use, was not putting the data itself into the right store pool;
4544 consequently, it could be overwritten for a subsequent message in the same
4545 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4548 38. Sometimes the final signoff response after QUIT could fail to get
4549 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4550 < 0 before doing a fflush(). This bug looks as though it goes back to the
4551 introduction of TLS in release 3.20, but "sometimes" must have been rare
4552 because the tests only now provoked it.
4558 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4559 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4560 Now it returns an integer. A number of calls were still expecting a T/F
4561 return. Fortuitously, in all cases, the tests worked in OK situations,
4562 which is the norm. However, things would have gone wrong on any write
4563 failures on the smtp file descriptor. This function is used when sending
4564 messages over SMTP and also when doing verify callouts.
4566 2. When Exim is called to do synchronous delivery of a locally submitted
4567 message (the -odf or -odi options), it no longer closes stderr before doing
4570 3. Implemented the mua_wrapper option.
4572 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4574 5. Implemented the functions header_remove(), header_testname(),
4575 header_add_at_position(), and receive_remove_recipient(), and exported them
4578 6. If an ACL "warn" statement specified the addition of headers, Exim already
4579 inserted X-ACL-Warn: at the start if there was no header name. However, it
4580 was not making this test for the second and subsequent header lines if
4581 there were newlines in the string. This meant that an invalid header could
4582 be inserted if Exim was badly configured.
4584 7. Allow an ACL "warn" statement to add header lines at the start or after all
4585 the Received: headers, as well as at the end.
4587 8. Added the rcpt_4xx retry error code.
4589 9. Added postmaster_mailfrom=xxx to callout verification option.
4591 10. Added mailfrom=xxxx to the callout verification option, for verify=
4594 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4595 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4597 12. Inserted some casts to stop certain compilers warning when using pointer
4598 differences as field lengths or precisions in printf-type calls (mostly
4599 affecting debugging statements).
4601 13. Added optional readline() support for -be (dynamically loaded).
4603 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4604 same clock tick as a message's arrival, so that its received time was the
4605 same as the "first fail" time on the retry record, and that message
4606 remained on the queue past the ultimate address timeout, every queue runner
4607 would try a delivery (because it was past the ultimate address timeout) but
4608 after another failure, the ultimate address timeout, which should have then
4609 bounced the address, did not kick in. This was a "< instead of <=" error;
4610 in most cases the first failure would have been in the next clock tick
4611 after the received time, and all would be well.
4613 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4614 being recognized when the domain list was tested by the match_domain
4615 condition in an expansion string.
4617 16. Added the ${str2b64: operator.
4619 17. Exim was always calling setrlimit() to set a large limit for the number of
4620 processes, without checking whether the existing limit was already
4621 adequate. (It did check for the limit on file descriptors.) Furthermore,
4622 errors from getrlimit() and setrlimit() were being ignored. Now they are
4623 logged to the main and panic logs, but Exim does carry on, to try to do its
4624 job under whatever limits there are.
4626 18. Imported PCRE 5.0.
4628 19. Trivial typo in log message " temporarily refused connection" (the leading
4631 20. If the log selector return_path_on_delivery was set and an address was
4632 redirected to /dev/null, the delivery process crashed because it assumed
4633 that a return path would always be set for a "successful" delivery. In this
4634 case, the whole delivery is bypassed as an optimization, and therefore no
4637 21. Internal re-arrangement: the function for sending a challenge and reading
4638 a response while authentication was assuming a zero-terminated challenge
4639 string. It's now changed to take a pointer and a length, to allow for
4640 binary data in such strings.
4642 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4644 23. Exim was not respecting finduser_retries when seeking the login of the
4645 uid under which it was called; it was always trying 10 times. (The default
4646 setting of finduser_retries is zero.) Also, it was sleeping after the final
4647 failure, which is pointless.
4649 24. Implemented tls_on_connect_ports.
4651 25. Implemented acl_smtp_predata.
4653 26. If the domain in control=submission is set empty, Exim assumes that the
4654 authenticated id is a complete email address when it generates From: or
4655 Sender: header lines.
4657 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4658 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4659 chown and chgrp in /bin and hostname in /usr/bin.
4661 28. Exim was keeping the "process log" file open after each use, just as it
4662 does for the main log. This opens the possibility of it remaining open for
4663 long periods when the USR1 signal hits a daemon. Occasional processlog
4664 errors were reported, that could have been caused by this. Anyway, it seems
4665 much more sensible not to leave this file open at all, so that is what now
4668 29. The long-running daemon process does not normally write to the log once it
4669 has entered its main loop, and it closes the log before doing so. This is
4670 so that log files can straightforwardly be renamed and moved. However,
4671 there are a couple of unusual error situations where the daemon does write
4672 log entries, and I had neglected to close the log afterwards.
4674 30. The text of an SMTP error response that was received during a remote
4675 delivery was being truncated at 512 bytes. This is too short for some of
4676 the long messages that one sometimes sees. I've increased the limit to
4679 31. It is now possible to make retry rules that apply only when a message has a
4680 specific sender, in particular, an empty sender.
4682 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4683 it possible to be selective about when SMTP synchronization is enforced.
4685 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4687 32. Implemented hosts_connection_nolog.
4689 33. Added an ACL for QUIT.
4691 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4694 35. Added mailbox_size and mailbox_filecount to appendfile.
4696 36. Added control = no_multiline_responses to ACLs.
4698 37. There was a bug in the logic of the code that waits for the clock to tick
4699 in the case where the clock went backwards by a substantial amount such
4700 that the microsecond fraction of "now" was more than the microsecond
4701 fraction of "then" (but the whole seconds number was less).
4703 38. Added support for the libradius Radius client library this is found on
4704 FreeBSD (previously only the radiusclient library was supported).
4710 1. When certain lookups returned multiple values in the form name=value, the
4711 quoting of the values was not always being done properly. Specifically:
4712 (a) If the value started with a double quote, but contained no whitespace,
4714 (b) If the value contained whitespace other than a space character (i.e.
4715 tabs or newlines or carriage returns) it was not quoted.
4716 This fix has been applied to the mysql and pgsql lookups by writing a
4717 separate quoting function and calling it from the lookup code. The fix
4718 should probably also be applied to nisplus, ibase and oracle lookups, but
4719 since I cannot test any of those, I have not disturbed their existing code.
4721 2. A hit in the callout cache for a specific address caused a log line with no
4722 reason for rejecting RCPT. Now it says "Previous (cached) callout
4723 verification failure".
4725 3. There was an off-by-one bug in the queryprogram router. An over-long
4726 return line was truncated at 256 instead of 255 characters, thereby
4727 overflowing its buffer with the terminating zero. As well as fixing this, I
4728 have increased the buffer size to 1024 (and made a note to document this).
4730 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4731 when Exim is waiting for an SMTP response from a remote server, Exim
4732 restarts its select() call on the socket, thereby resetting its timeout.
4733 This is not a problem when such interrupts are rare. Somebody set up a cron
4734 job to run exiwhat every 2 minutes, which is less than the normal select()
4735 timeout (5 or 10 minutes). This meant that the select() timeout never
4736 kicked in because it was always reset. I have fixed this by comparing the
4737 time when an interrupt arrives with the time at the start of the first call
4738 to select(). If more time than the timeout has elapsed, the interrupt is
4739 treated as a timeout.
4741 5. Some internal re-factoring in preparation for the addition of Sieve
4742 extensions (by MH). In particular, the "personal" test is moved to a
4743 separate function, and given an option for scanning Cc: and Bcc: (which is
4744 not set for Exim filters).
4746 6. When Exim created an email address using the login of the caller as the
4747 local part (e.g. when creating a From: or Sender: header line), it was not
4748 quoting the local part when it contained special characters such as @.
4750 7. Installed new OpenBSD configuration files.
4752 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4753 try to make them clearer.
4755 9. Callout options, other than the timeout value, were being ignored when
4756 verifying sender addresses in header lines. For example, when using
4758 verify = header_sender/callout=no_cache
4760 the cache was (incorrectly) being used.
4762 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4763 only the Cygwin environment.
4765 11. When return_path_on_delivery was set as a log selector, if different remote
4766 addresses in the same message used different return paths and parallel
4767 remote delivery occurred, the wrong values would sometimes be logged.
4768 (Whenever a remote delivery process finished, the return path value from
4769 the most recently started remote delivery process was logged.)
4771 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4772 lines when AUTH and/or TLS are in use. This is the "received protocol"
4773 field. Exim used to use "asmtp" for authenticated SMTP, without any
4774 indication (in the protocol name) for TLS use. Now it follows the RFC and
4775 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4776 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4777 names appear in log lines as well as in Received: header lines.
4779 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4780 extensions, and comparison tests, and to fix some bugs.
4782 14. Changes to the "personal" filter test:
4784 (1) The test was buggy in that it was just doing the equivalent of
4785 "contains" tests on header lines. For example, if a user's address was
4786 anne@some.where, the "personal" test would incorrectly be true for
4788 To: susanne@some.where
4790 This test is now done by extracting each address from the header in turn,
4791 and checking the entire address. Other tests that are part of "personal"
4792 are now done using regular expressions (for example, to check local parts
4793 of addresses in From: header lines).
4795 (2) The list of non-personal local parts in From: addresses has been
4796 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4797 taken from the Sieve specification recommendations.
4799 (3) If the message contains any header line starting with "List-" it is
4800 treated as non-personal.
4802 (4) The test for "circular" in the Subject: header line has been removed
4803 because it now seems ill-conceived.
4805 15. Minor typos in src/EDITME comments corrected.
4807 16. Installed latest exipick from John Jetmore.
4809 17. If headers_add on a router specified a text string that was too long for
4810 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4811 of string_sprintf() is now avoided.
4813 18. $message_body_size was not set (it was always zero) when running the DATA
4814 ACL and the local_scan() function.
4816 19. For the "mail" command in an Exim filter, no default was being set for
4817 the once_repeat time, causing a random time value to be used if "once" was
4818 specified. (If the value happened to be <= 0, no repeat happened.) The
4819 default is now 0s, meaning "never repeat". The "vacation" command was OK
4820 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4821 (I found it when inspecting the code).
4823 20. There is now an overall timeout for performing a callout verification. It
4824 defaults to 4 times the callout timeout, which applies to individual SMTP
4825 commands during the callout. The overall timeout applies when there is more
4826 than one host that can be tried. The timeout is checked before trying the
4827 next host. This prevents very long delays if there are a large number of
4828 hosts and all are timing out (e.g. when the network connections are timing
4829 out). The value of the overall timeout can be changed by specifying an
4830 additional sub-option for "callout", called "maxwait". For example:
4832 verify = sender/callout=5s,maxwait=20s
4834 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4835 to the end before writing, but this should make it even safer).
4837 22. Exim was forgetting that it had advertised PIPELINING for the second and
4838 subsequent messages on an SMTP connection. It was also not resetting its
4839 memory on STARTTLS and an internal HELO.
4841 23. When Exim logs an SMTP synchronization error within a session, it now
4842 records whether PIPELINING has been advertised or not.
4844 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4845 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4846 rather than long int.
4848 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4850 26. Added the never_mail option to autoreply.
4856 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4857 crash if the getsockname() call failed; this can happen if a connection is
4858 closed very soon after it is established. The problem was simply in the
4859 order in which certain operations were done, causing Exim to try to write
4860 to the SMTP stream before it had set up the file descriptor. The bug has
4861 been fixed by making things happen in the correct order.
4867 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4868 before the connection was closed, thus losing the rejection response.
4870 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4871 some early Solaris releases, but causes trouble in current releases where
4872 socklen_t is defined.
4874 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4877 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4880 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4881 that releasing the top of it at the end releases what was used for sub-
4882 expansions (unless the block got too big). However, discard this block if
4883 the first thing is a variable or header, so that we can use its block when
4884 it is dynamic (useful for very large $message_headers, for example).
4886 6. Lookups now cache *every* query, not just the most recent. A new, separate
4887 store pool is used for this. It can be recovered when all lookup caches are
4888 flushed. Lookups now release memory at the end of their result strings.
4889 This has involved some general refactoring of the lookup sources.
4891 7. Some code has been added to the store_xxx() functions to reduce the amount
4892 of flapping under certain conditions.
4894 8. log_incoming_interface used to affect only the <= reception log lines. Now
4895 it causes the local interface and port to be added to several more SMTP log
4896 lines, for example "SMTP connection from", and rejection lines.
4898 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4900 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4902 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4903 could be overwritten at the end of the current message (or the start of a
4904 new message if it was set in a HELO ACL). The value is now preserved for
4905 the duration of the SMTP connection.
4907 12. If a transport had a headers_rewrite setting, and a matching header line
4908 contained an unqualified address, that address was qualified, even if it
4909 did not match any rewriting rules. The underlying bug was that the values
4910 of the flags that permit the existence of unqualified sender and recipient
4911 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4912 non-local messages, and by -bnq for local messages) were not being
4913 preserved with the message after it was received.
4915 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4916 "next input=" as part of the text comprising the host identity instead of
4917 the correct text. The code was using the same buffer for two different
4918 strings. However, depending on which order the printing function evaluated
4919 its arguments, the bug did not always show up. Under Linux, for example, my
4920 test suite worked just fine.
4922 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4923 doesn't work with some older versions of Perl. It has been changed to "my",
4924 which in any case is probably the better facility to use.
4926 15. A really picky compiler found some instances of statements for creating
4927 error messages that either had too many or two few arguments for the format
4930 16. The size of the buffer for calls to the DNS resolver has been increased
4931 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4932 for addresses that have a lot of PTR records. This alleviates a problem; it
4933 does not fully solve it.
4935 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4936 buffer now truncates the list and logs the incident, which is the same
4937 action as happens when Exim is looking up a host name and its aliases.
4938 Previously in this situation something unpredictable would happen;
4939 sometimes it was "internal error: store_reset failed".
4941 18. If a server dropped the connection unexpectedly when an Exim client was
4942 using GnuTLS and trying to read a response, the client delivery process
4943 crashed while trying to generate an error log message.
4945 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4946 string, for example:
4948 warn message = H1: something\nH2: something
4950 the text was added as a single header line from Exim's point of view
4951 though it ended up OK in the delivered message. However, searching for the
4952 second and subsequent header lines using $h_h2: did not work. This has been
4953 fixed. Similarly, if a system filter added multiple headers in this way,
4954 the routers could not see them.
4956 20. Expanded the error message when iplsearch is called with an invalid key to
4957 suggest using net-iplsearch in a host list.
4959 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4960 ACLs are no longer actually imposed (and a message to that effect is
4963 22. If a "gecos" field in a passwd entry contained escaped characters, in
4964 particular, if it contained a \" sequence, Exim got it wrong when building
4965 a From: or a Sender: header from that name. A second bug also caused
4966 incorrect handling when an unquoted " was present following a character
4967 that needed quoting.
4969 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4970 was not being matched caselessly.
4972 24. Arranged for all hyphens in the exim.8 source to be escaped with
4975 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4976 properly. Recipient callout cache records were still being keyed to include
4977 the sender, even when use_sender was set false. This led to far more
4978 callouts that were necessary. The sender is no longer included in the key
4979 when use_sender is false.
4981 26. Added "control = submission" modifier to ACLs.
4983 27. Added the ${base62d: operator to decode base 62 numbers.
4985 28. dnsdb lookups can now access SRV records.
4987 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4988 the configuration file.
4990 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4991 (-v) mode. This makes the output for a verbose queue run more intelligible.
4993 31. Added a use_postmaster feature to recipient callouts.
4995 32. Added the $body_zerocount variable, containing the number of binary zero
4996 bytes in the message body.
4998 33. The time of last modification of the "new" subdirectory is now used as the
4999 "mailbox time last read" when there is a quota error for a maildir
5002 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5004 35. Added +ignore_unknown as a special item in host lists.
5006 36. Code for decoding IPv6 addresses in host lists is now included, even if
5007 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5008 address was recognized as an IP address, but was then not correctly decoded
5009 into binary, causing unexpected and incorrect effects when compared with
5016 1. Very minor rewording of debugging text in manualroute to say "list of
5017 hosts" instead of "hostlist".
5019 2. If verify=header_syntax was set, and a header line with an unqualified
5020 address (no domain) and a large number of spaces between the end of the
5021 name and the colon was received, the reception process suffered a buffer
5022 overflow, and (when I tested it) crashed. This was caused by some obsolete
5023 code that should have been removed. The fix is to remove it!
5025 3. When running in the test harness, delay a bit after writing a bounce
5026 message to get a bit more predictability in the log output.
5028 4. Added a call to search_tidyup() just before forking a reception process. In
5029 theory, someone could use a lookup in the expansion of smtp_accept_max_
5030 per_host which, without the tidyup, could leave open a database connection.
5032 5. Added the variables $recipient_data and $sender_data which get set from a
5033 lookup success in an ACL "recipients" or "senders" condition, or a router
5034 "senders" option, similar to $domain_data and $local_part_data.
5036 6. Moved the writing of debug_print from before to after the "senders" test
5039 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5040 problems for message scanning, either using a data ACL, or using
5041 local_scan() because the Received: header was not generated till after they
5042 were called (in order to set the time as the time of reception completion).
5043 I have revised the way this works. The header is now generated after the
5044 body is received, but before the ACL or local_scan() are called. After they
5045 are run, the timestamp in the header is updated.
5051 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5052 before starting a queue runner without re-exec. This happened only when
5053 deliver_drop_privilege was set or when the Exim user was set to root. The
5054 effect of the bug was that timeouts during subsequent deliveries caused
5055 crashes instead of being properly handled. The handler is now left at its
5056 default (and expected) setting.
5058 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5059 message, again when deliver_drop_privilege is set or Exim is run as root.
5060 The bug described in (1) was not present in this case, but the tidying up
5061 of the other signals was missing. I have made the two cases consistent.
5063 3. The ignore_target_hosts setting on a manualroute router was being ignored
5064 for hosts that were looked up using the /MX notation.
5066 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5069 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5070 operated on the sender address. After changing the $sender_address to <>
5071 for the sender address verify, Exim was re-instated it as the original
5072 (before rewriting) address, but remembering that it had rewritten it, so it
5073 wasn't rewriting it again. This bug also had the effect of breaking the
5074 sender address verification caching when the sender address was rewritten.
5076 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5077 This has been changed so that if the ip literal address matches
5078 ignore_target_hosts, the router declines.
5080 7. Added expansion conditions match_domain, match_address, and match_local_
5081 part (NOT match_host).
5083 8. The placeholder for the Received: header didn't have a length field set.
5085 9. Added code to Exim itself and to exim_lock to test for a specific race
5086 condition that could lead to file corruption when using MBX delivery. The
5087 issue is with the lockfile that is created in /tmp. If this file is removed
5088 after a process has opened it but before that process has acquired a lock,
5089 there is the potential for a second process to recreate the file and also
5090 acquire a lock. This could lead to two Exim processes writing to the file
5091 at the same time. The added code performs the same test as UW imapd; it
5092 checks after acquiring the lock that its file descriptor still refers to
5093 the same named file.
5095 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5096 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5099 11. Added the smtp_active_hostname option. If used, this will typically be made
5100 to depend on the incoming interface address. Because $interface_address is
5101 not set up until the daemon has forked a reception process, error responses
5102 that can happen earlier (such as "too many connections") no longer contain
5105 12. If an expansion in a condition on a "warn" statement fails because a lookup
5106 defers, the "warn" statement is abandoned, and the next ACL statement is
5107 processed. Previously this caused the whole ACL to be aborted.
5109 13. Added the iplsearch lookup type.
5111 14. Added ident_timeout as a log selector.
5113 15. Added tls_certificate_verified as a log selector.
5115 16. Added a global option tls_require_ciphers (compare the smtp transport
5116 option of the same name). This controls incoming TLS connections.
5118 17. I finally figured out how to make tls_require_ciphers do a similar thing
5119 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5120 before starting the TLS session.
5122 18. Tabs are now shown as \t in -bP output.
5124 19. If the log selector return_path_on_delivery was set, Exim crashed when
5125 bouncing a message because it had too many Received: header lines.
5127 20. If two routers both had headers_remove settings, and the first one included
5128 a superfluous trailing colon, the final name in the first list and the
5129 first name in the second list were incorrectly joined into one item (with a
5130 colon in the middle).
5136 1. Added -C and -D options to the exinext utility, mainly to make it easier
5137 to include in the automated testing, but these could be helpful when
5138 multiple configurations are in use.
5140 2. The exinext utility was not formatting the output nicely when there was
5141 an alternate port involved in the retry record key, nor when there was a
5142 message id as well (for retries that were specific to a specific message
5143 and a specific host). It was also confused by IPv6 addresses, because of
5144 the additional colons they contain. I have fixed the IPv4 problem, and
5145 patched it up to do a reasonable job for IPv6.
5147 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5148 delivery, the log line now contains "pipelined" if PIPELINING was used.
5150 4. An SMTP transport process used to panic and die if the bind() call to set
5151 an explicit outgoing interface failed. This has been changed; it is now
5152 treated in the same way as a connect() failure.
5154 5. A reference to $sender_host_name in the part of a conditional expansion
5155 that was being skipped was still causing a DNS lookup. This no longer
5158 6. The def: expansion condition was not recognizing references to header lines
5159 that used bh_ and bheader_.
5161 7. Added the _cache feature to named lists.
5163 8. The code for checking quota_filecount in the appendfile transport was
5164 allowing one more file than it should have been.
5166 9. For compatibility with Sendmail, the command line option
5174 and sets the incoming protocol and host name (for trusted callers). The
5175 host name and its colon can be omitted when only the protocol is to be set.
5176 Note the Exim already has two private options, -pd and -ps, that refer to
5177 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5178 "s", but I don't think that's a major issue.
5180 10. A number of refactoring changes to the code, none of which should affect
5183 (a) The number of logging options was getting close to filling up the
5184 32-bit word that was used as a bit map. I have split them into two classes:
5185 those that are passed in the argument to log_write(), and those that are
5186 only ever tested independently outside of that function. These are now in
5187 separate 32-bit words, so there is plenty of room for expansion again.
5188 There is no change in the user interface or the logging behaviour.
5190 (b) When building, for example, log lines, the code previously used a
5191 macro that called string_cat() twice, in order to add two strings. This is
5192 not really sufficiently general. Furthermore, there was one instance where
5193 it was actually wrong because one of the argument was used twice, and in
5194 one call a function was used. (As it happened, calling the function twice
5195 did not affect the overall behaviour.) The macro has been replaced by a
5196 function that can join an arbitrary number of extra strings onto a growing
5199 (c) The code for expansion conditions now uses a table and a binary chop
5200 instead of a serial search (which was left over from when there were very
5201 few conditions). Also, it now recognizes conditions like "pam" even when
5202 the relevant support is not compiled in: a suitably worded error message is
5203 given if an attempt is made to use such a condition.
5205 11. Added ${time_interval:xxxxx}.
5207 12. A bug was causing one of the ddress fields not to be passed back correctly
5208 from remote delivery subprocesses. The field in question was not being
5209 subsequently used, so this caused to problems in practice.
5211 13. Added new log selectors queue_time and deliver_time.
5213 14. Might have fixed a bug in maildirsizefile handling that threw up
5214 "unexpected character" debug warnings, and recalculated the data
5215 unnecessarily. In any case, I expanded the warning message to give more
5218 15. Added the message "Restricted characters in address" to the statements in
5219 the default ACL that block characters like @ and % in local parts.
5221 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5222 Three changes have been made:
5224 (a) There was a serious bug; a negative response to MAIL caused the whole
5225 recipient domain to be cached as invalid, thereby blocking all messages
5226 to all local parts at the same domain, from all senders. This bug has
5227 been fixed. The domain is no longer cached after a negative response to
5228 MAIL if the sender used is not empty.
5230 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5233 (c) A new callout option, "use_sender" has been added for people who want
5234 the modified behaviour.
5240 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5243 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5244 indeed breaks things for older releases.
5246 3. Added additional logging to the case where there is a problem reading data
5247 from a filter that is running in a subprocess using a pipe, in order to
5248 try to track down a specific problem.
5250 4. Testing facility fudge: when running in the test harness and attempting
5251 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5252 getting "No route to host". Convert this to a timeout.
5254 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5257 6. Some OS don't have socklen_t but use size_t instead. This affects the
5258 fifth argument of getsockopt() amongst other things. This is now
5259 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5260 can be set for individual OS. I have set it for SunOS5, OSF1, and
5261 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5262 some earlier ones do not.
5264 7. Change 4.30/15 was not doing the test caselessly.
5266 8. The standard form for an IPv6 address literal was being rejected by address
5267 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5268 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5269 this, as well as the form without the "IPv6" on the front (but only when
5270 address literals are enabled, of course).
5272 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5274 10. Exim crashed if a message with an empty sender address specified by -f
5275 encountered a router with an errors_to setting. This could be provoked only
5276 by a command such as
5280 where an empty string was supplied; "<>" did not hit this bug.
5282 11. Installed PCRE release 4.5.
5284 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5285 remained set. It is now erased.
5287 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5288 times from message ids (which are base 36 rather than the normal 62).
5290 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5291 were being counted as actual protocol errors, and logged if the log
5292 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5293 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5294 and DATA following a set of rejected RCPTs do not count as protocol errors.
5295 In other words, Exim assumes they were pipelined, though this may not
5296 actually be the case. Of course, in all cases the client gets an
5297 appropriate error code.
5299 15. If a lookup fails in an ACL condition, a message about the failure may
5300 be available; it is used if testing the ACL cannot continue, because most
5301 such messages specify what the cause of the deferral is. However, some
5302 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5303 that caused an old message to be retained and used if a later statement
5304 caused a defer, replacing the real cause of the deferral.
5306 16. If an IP address had so many PTR records that the DNS lookup buffer
5307 was not large enough to hold them, Exim could crash while trying to process
5308 the truncated data. It now detects and logs this case.
5310 17. Further to 4.21/58, another change has been made: if (and only if) the
5311 first line of a message (the first header line) ends with CRLF, a bare LF
5312 in a subsequent header line has a space inserted after it, so as not to
5313 terminate the header.
5315 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5316 unnecessarily, used atoi() instead of strtol(), and didn't check the
5317 termination when getting file sizes from file names by regex.
5319 19. Completely re-implemented the support for maildirsize files, in the light
5320 of a number of problems with the previous contributed implementation
5321 (4.30/29). In particular:
5323 . If the quota is zero, the maildirsize file is maintained, but no quota is
5326 . If the maildir directory does not exist, it is created before any attempt
5327 to write a maildirsize file.
5329 . The quota value in the file is just a cache; if the quota is changed in
5330 the transport, the new value overrides.
5332 . A regular expression is available for excluding directories from the
5335 20. The autoreply transport checks the characters in options that define the
5336 message's headers; it allows continued headers, but it was checking with
5337 isspace() after an embedded newline instead of explicitly looking for a
5340 21. If all the "regular" hosts to which an address was routed had passed their
5341 expiry times, and had not reached their retry times, the address was
5342 bounced, even if fallback hosts were defined. Now Exim should go on to try
5345 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5346 equivalent code in the SMTP transport. Some hosts send humungous responses
5347 to HELO/EHLO, more than 1024 it seems.
5349 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5350 gives compiler warnings in some environments. I've now done it "properly",
5353 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5354 (because of problems with the built-in one) was declared to return uschar *
5355 instead of char *, causing compiler failure.
5357 25. Fixed a file descriptor leak when processing alias/forward files.
5359 26. Fixed a minor format string issue in dbfn.c.
5361 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5363 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5364 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5367 29. When a sender address is verified, it is cached, to save repeating the test
5368 when there is more than one recipient in a message. However, when the
5369 verification involves a callout, it is possible for different callout
5370 options to be set for different recipients. It is too complicated to keep
5371 track of this in the cache, so now Exim always runs a verification when a
5372 callout is required, relying on the callout cache for the optimization.
5373 The overhead is duplication of the address routing, but this should not be
5376 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5377 to be verified with callout=postmaster, and the main callout worked but the
5378 postmaster check failed, the verification correctly failed. However, if a
5379 subsequent RCPT command asked for sender verification *without* the
5380 postmaster check, incorrect caching caused this verification also to fail,
5383 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5384 it was not caching the DNS options (qualify_single, search_parents) that
5385 were used when the lookup failed. A subsequent lookup with different
5386 options therefore always gave the same answer, though there were cases
5387 where it should not have. (Example: a "domains = !$mx_any" option on a
5388 dnslookup router: the "domains" option is always processed without any
5389 widening, but the router might have qualify_single set.) Now Exim uses the
5390 cached value only when the same options are set.
5392 32. Added John Jetmore's "exipick" utility to the distribution.
5394 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5395 than a timeout (e.g. a certificate is required, and is not provided), an
5396 Exim server now closes the connection immediately. Previously it waited for
5397 the client to close - but if the client is SSL, it seems that they each
5398 wait for each other, leading to a delay before one of them times out.
5400 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5401 maintained 0.8.x compatibility because I don't think many are using it, and
5402 it is clearly obsolete.
5404 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5407 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5408 client certificate was expired. A simple patch fixes this, though I don't
5409 understand the full logic of why the verify callback is called multiple
5412 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5413 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5414 which causes problems with some clients (such as the Certicom SSL Plus
5415 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5416 disables the coutermeasure allowing Eudora to connect."
5418 38. Exim was not checking that a write() to a log file succeeded. This could
5419 lead to Bad Things if a log got too big, in particular if it hit a file
5420 size limit. Exim now panics and dies if it cannot write to a log file, just
5421 as it does if it cannot open a log file.
5423 39. Modified OS/Makefile-Linux so that it now contains
5425 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5427 The two -D definitions ensure that Exim is compiled with large file
5428 support, which makes it possible to handle log files that are bigger than
5431 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5432 instance) a domain was checked against a named list that involved a lookup,
5433 causing $domain_data to be set, then another domain was checked against the
5434 same list, then the first domain was re-checked, the value of $domain_data
5435 after the final check could be wrong. In particular, if the second check
5436 failed, it could be set empty. This bug probably also applied to
5439 41. The strip_trailing_dot option was not being applied to the address given
5440 with the -f command-line option.
5442 42. The code for reading a message's header from the spool was incrementing
5443 $received_count, but never initializing it. This meant that the value was
5444 incorrect (doubled) while delivering a message in the same process in which
5445 it was received. In the most common configuration of Exim, this never
5446 happens - a fresh exec is done - but it can happen when
5447 deliver_drop_privilege is set.
5449 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5450 it now includes up to 150 characters of the unexpected data in the log
5453 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5454 and building data strings. The size of both of these buffers was 10 000
5455 bytes - far larger than anybody would *ever* want, thought I. Needless to
5456 say, somebody hit the limit. I have increased the maximum line length to
5457 20 000 and the maximum data length of concatenated lines to 100 000. I have
5458 also fixed two bugs, because there was no checking on these buffers. Tsk,
5459 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5460 buffer is too small.
5462 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5463 lsearch lookups. Now it does.
5465 46. When parsing a route_list item in a manualroute router, a fixed-length
5466 buffer was used for the list of hosts. I made this 1024 bytes long,
5467 thinking that nobody would ever have a list of hosts that long. Wrong.
5468 Somebody had a whole pile of complicated expansion conditions, and the
5469 string was silently truncated, leading to an expansion error. It turns out
5470 that it is easier to change to an unlimited length (owing to other changes
5471 that have happened since this code was originally written) than to build
5472 structure for giving a limitation error. The length of the item that
5473 expands into the list of hosts is now unlimited.
5475 47. The lsearch lookup could not handle data where the length of text line was
5476 more than 4095 characters. Such lines were truncated, leading to shortened
5477 data being returned. It should now handle lines of any length.
5479 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5480 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5483 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5484 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5485 no longer happens in comment lines. A list of replacements is now placed
5486 at the head of all of the source files, except those whose only change is
5487 to replace PERL_COMMAND in the very first #! line.
5489 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5490 messages on the queue, with a bottom-up merge sort, using code contributed
5491 by Michael Haardt. This should make operations like -bp somewhat faster on
5492 large queues. It won't affect queue runners, except when queue_run_in_order
5495 51. Installed eximstats 1.31 in the distribution.
5497 52. Added support for SRV lookups to the dnslookup router.
5499 53. If an ACL referred to $message_body or $message_body_end, the value was not
5500 reset for any messages that followed in the same SMTP session.
5502 54. The store-handling optimization for building very long strings was not
5503 differentiating between the different store pools. I don't think this
5504 actually made any difference in practice, but I've tidied it.
5506 55. While running the routers to verify a sender address, $sender_address
5507 was still set to the sender address. This is wrong, because when routing to
5508 send a bounce to the sender, it would be empty. Therefore, I have changed
5509 it so that, while verifying a sender address, $sender_address is set to <>.
5510 (There is no change to what happens when verifying a recipient address.)
5512 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5513 target A or AAAA records (if not already returned) without resetting the
5514 qualify_single or search_parents options of the DNS resolver. These are
5515 inappropriate in this case because the targets of MX and SRV records must
5516 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5517 target that, when qualified, matched something in the local domain. These
5518 two options are now turned off when doing these lookups.
5520 57. It seems that at least some releases of Reiserfs (which does not have the
5521 concept of a fixed number of inodes) returns zero and not -1 for the
5522 number of available inodes. This interacted badly with check_spool_inodes,
5523 which assumed that -1 was the "no such thing" setting. What I have done is
5524 to check that the total number of inodes is greater than zero before doing
5525 the test of how many are available.
5527 58. When a "warn" ACL statement has a log_message modifier, the message is
5528 remembered, and not repeated. This is to avoid a lot of repetition when a
5529 message has many recipients that cause the same warning to be written.
5530 Howewer, Exim was preserving the list of already written lines for an
5531 entire SMTP session, which doesn't seem right. The memory is now reset if a
5532 new message is started.
5534 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5535 debugging output unless log_rewrite was also set.
5537 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5538 of (int)(handle) when we know that handle contains (void *)(-1).
5540 61. The Exim daemon panic-logs an error return when it closes the incoming
5541 connection. However "connection reset by peer" seems to be common, and
5542 isn't really an error worthy of noting specially, so that particular error
5545 62. When Exim is trying to find all the local interfaces, it used to panic and
5546 die if the ioctl to get the interface flags failed. However, it seems that
5547 on at least one OS (Solaris 9) it is possible to have an interface that is
5548 included in the list of interfaces, but for which you get a failure error
5549 for this call. This happens when the interface is not "plumbed" into a
5550 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5551 failure of the "get flags" call assumes that the interface is down.
5553 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5554 makes life easier for people who are doing arithmetic on fields extracted
5555 from dates, where you often get leading zeros that should not be
5556 interpreted as octal.
5558 64. Added qualify_domain to the redirect router, to override the global
5561 65. If a pathologically long header line contained very many addresses (the
5562 report of this problem mentioned 10 000) and each of them was rewritten,
5563 Exim could use up a very large amount of memory. (It kept on making new
5564 copies of the header line as it rewrote, and never released the old ones.)
5565 At the expense of a bit more processing, the header rewriting function has
5566 been changed so that it no longer eats memory in this way.
5568 66. The generation of the Received: header has been moved from the time that a
5569 message starts to be received, to the time that it finishes. The timestamp
5570 in the Received: header should now be very close to that of the <= log
5571 line. There are two side-effects of this change:
5573 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5574 logged header lines no longer include the local Received: line, because
5575 it has not yet been created. The same applies to a copy of the message
5576 that is returned to a non-SMTP sender when a message is rejected.
5578 (b) When a filter file is tested using -bf, no additional Received: header
5579 is added to the test message. After some thought, I decided that this
5582 This change does not affect the value of $received_for. It is still set
5583 after address rewriting, but before local_scan() is called.
5585 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5587 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5588 gave an unhelpful panic error message, and a defer error. I have managed to
5589 change this behaviour so that it now rejects any supplied certificate,
5590 which seems right, as the list of acceptable certificates is empty.
5592 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5593 gave an unhelpful defer error. I have not managed to make this reject any
5594 supplied certificates, but the error message it gives is "no certificate
5595 supplied", which is not helpful.
5597 70. exigrep's output now also includes lines that are not associated with any
5598 message, but which match the given pattern. Implemented by a patch from
5599 Martin Sluka, which also tidied up the Perl a bit.
5601 71. Recipient callout verification, like sender verification, was using <> in
5602 the MAIL FROM command. This isn't really the right thing, since the actual
5603 sender may affect whether the remote host accepts the recipient or not. I
5604 have changed it to use the actual sender in the callout; this means that
5605 the cache record is now keyed on a recipient/sender pair, not just the
5606 recipient address. There doesn't seem to be a real danger of callout loops,
5607 since a callout by the remote host to check the sender would use <>.
5608 [SEE ABOVE: changed after hitting problems.]
5610 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5611 temporary errors. However, in the case of such a code being given after
5612 the end of a data transmission (i.e. after ".") Exim was failing to write
5613 a retry record for the message. (Yes, there was some broken host that was
5614 actually sending 8xx at this point.)
5616 73. An unknown lookup type in a host list could cause Exim to panic-die when
5617 the list was checked. (An example that provoked this was putting <; in the
5618 middle of a list instead of at the start.) If this happened during a DATA
5619 ACL check, a -D file could be left lying around. This kind of configuration
5620 error no longer causes Exim to die; instead it causes a defer errror. The
5621 incident is still logged to the main and panic logs.
5623 74. Buglet left over from Exim 3 conversion. The message "too many messages
5624 in one connection" was written to the rejectlog but not the mainlog, except
5625 when address rewriting (yes!) was being logged.
5627 75. Added write_rejectlog option.
5629 76. When a system filter was run not as root (that is, when system_filter_user
5630 was set), the values of the $n variables were not being returned to the
5631 main process; thus, they were not subsequently available in the $sn
5634 77. Added +return_path_on_delivery log selector.
5636 78. A connection timeout was being treated differently from recipients deferred
5637 when testing hosts_max_try with a message that was older than the host's
5638 retry timeout. (The host should not be counted, thus allowing all hosts to
5639 be tried at least once before bouncing.) This may have been the cause of an
5640 occasionally reported bug whereby a message would remain on the queue
5641 longer than the retry timeout, but would be bounced if a delivery was
5642 forced. I say "may" because I never totally pinned down the problem;
5643 setting up timeout/retry tests is difficult. See also the next item.
5645 79. The ultimate address timeout was not being applied to errors that involved
5646 a combination of host plus message (for example, a timeout on a MAIL
5647 command). When an address resolved to a number of possible hosts, and they
5648 were not all tried for each delivery (e.g. because of hosts_max_try), a
5649 message could remain on the queue longer than the retry timeout.
5651 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5654 81. Fixed an obscure SMTP outgoing bug which required at least the following
5655 conditions: (a) there was another message waiting for the same server;
5656 (b) the server returned 5xx to all RCPT commands in the first message so
5657 that the message was not completed; (c) the server dropped the connection
5658 or gave a negative response to the RSET that Exim sends to abort the
5659 transaction. The observed case was a dropped connection after DATA that had
5660 been sent in pipelining mode. That is, the server had advertised PIPELINING
5661 but was not implementing it correctly. The effect of the bug was incorrect
5662 behaviour, such as trying another host, and this could lead to a crash.
5668 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5669 and daemon.c were passed as pointers to ints; they should have been
5670 pointers to socklen_t variables (which are typically unsigned ints).
5672 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5675 3. Fixed a really odd bug that affected only the testing scheme; patching a
5676 certain fixed string in the binary changed the value of another string that
5677 happened to be identical to the end of the original first string.
5679 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5680 name", it returns that address as the IP address. On some operating
5681 systems (e.g. Solaris), it also passes back the IP address string as the
5682 "host name". However, on others (e.g. Linux), it passes back an empty
5683 string. Exim wasn't checking for this, and was changing the host name to an
5684 empty string, assuming it had been canonicized.
5686 5. Although rare, it is permitted to have more than one PTR record for a given
5687 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5688 all the names associated with an address, because they do in Solaris.
5689 However, it seems that they do not in Linux for data that comes from the
5690 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5691 I found this out when I moved to a new Linux workstation and tried to run
5692 the Exim test suite.
5694 To get round this problem I have changed the code so that it now does its
5695 own call to the DNS to look up PTR records when searching for a host name.
5696 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5697 addresses that are only in /etc/hosts are still found.
5699 This behaviour is, however, controlled by an option called host_lookup_
5700 order, which defaults to "bydns:byaddr". If people want to use the other
5701 order, or indeed, just use one or the other means of lookup, they can
5702 specify it in this variable.
5704 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5705 some operating systems, this comes back from gethostbyaddr() as an empty
5706 string, and this is what Exim used to test for. However, it seems that in
5707 other systems, "." is yielded. Exim now tests for this case too.
5709 7. The values of check_spool_space and check_log_space are now held internally
5710 as a number of kilobytes instead of an absolute number of bytes. If a
5711 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5712 kilobyte. This means that much larger values can be stored.
5714 8. Exim monitor: an attempt to get the action menu when not actually pointing
5715 at a message produces an empty menu entitled "No message selected". This
5716 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5717 no entries in it ("Shell widget menu has zero width and/or height"). So I
5718 have added a single, blank menu entry in this case.
5720 9. Added ${quote_local_part.
5722 10. MIME decoding is now applied to the contents of Subject: header lines when
5725 11. Now that a reference to $sender_host_address automatically causes a reverse
5726 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5727 host lookup before query-style lookups in lists that might use this
5728 variable. This has therefore been abolished, and the "net-" prefix is no
5729 longer necessary for query-style lookups.
5731 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5732 have been a typo for LFLAGS, so it has been changed.
5734 13. The install script calls Exim with "-C /dev/null" in order to find the
5735 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5736 to be output. Howeve, since Exim outputs its version number before the
5737 error, it didn't break the script. It just looked ugly. I fixed this by
5738 always allowing "-C /dev/null" if the caller is root.
5740 14. Ignore overlarge ACL variable number when reading spool file - insurance
5741 against a later release with more variables having written the file.
5743 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5744 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5745 this, as well as the form without the "IPv6" on the front.
5747 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5748 OS/Makefile-Darwin file.
5750 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5751 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5753 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5754 variable. However, some OS use ints for inodes. I've added cast to long int
5755 to get rid of the compiler warning.
5757 19. I had forgotten to lock out "/../" in configuration file names when
5758 ALT_CONFIG_PREFIX was set.
5760 20. Routers used for verification do not need to specify transports. However,
5761 if such a router generated a host list, and callout was configured, Exim
5762 crashed, because it could not find a port number from the (non-existent)
5763 transport. It now assumes port 25 in this circumstance.
5765 21. Added the -t option to exigrep.
5767 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5768 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5769 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5770 them is set, LOOKUP_LSEARCH is forced.
5772 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5774 24. Added sender and host information to the "rejected by local_scan()" log
5775 line; previously there was no indication of these.
5777 25. Added .include_if_exists.
5779 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5780 Linux. It turns out that not all file systems support this. Apparently some
5781 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5782 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5783 not supported on the file descriptor, is now ignored when Exim is trying to
5784 sync a directory. This applies only to Linux.
5786 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5788 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5789 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5792 29. Added support for maildirsize files from supplied patch (modified a bit).
5794 30. The use of :fail: followed by an empty string could lead Exim to respond to
5795 sender verification failures with (e.g.):
5797 550 Verification failed for <xxx>
5798 550 Sender verify failed
5800 where the first response line was missing the '-' that indicates it is not
5801 the final line of the response.
5803 31. The loop for finding the name of the user that called Exim had a hardwired
5804 limit of 10; it now uses the value of finduser_retries, which is used for
5805 all other user lookups.
5807 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5810 33. Exim was neglecting to zero errno before one call of strtol() when
5811 expanding a string and expecting an integer value. On some systems this
5812 resulted in spurious "integer overflow" errors. Also, it was casting the
5813 result into an int without checking.
5815 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5816 did not work. The code looks as if it has *never* worked, though it appears
5817 to have been documented since at least releast 1.62. I have made it work.
5819 35. The "timeout_DNS" error in retry rules, also documented since at least
5820 1.62, also never worked. As it isn't clear exactly what this means, and
5821 clearly it isn't a major issue, I have abolished the feature by treating it
5822 as "timeout", and writing a warning to the main and panic logs.
5824 36. The display of retry rules for -brt wasn't always showing the error code
5827 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5828 timeout_connect_A, timeout_connect_MX.
5830 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5831 to the empty sender.
5833 39. The daemon was not analysing the content of -oX till after it had closed
5834 stderr and disconnected from the controlling terminal. This meant that any
5835 syntax errors were only noted on the panic log, and the return code from
5836 the command was 0. By re-arranging the code a little, I've made the
5837 decoding happen first, so such errors now appear on stderr, and the return
5838 code is 1. However, the actual setting up of the sockets still happens in
5839 the disconnected process, so errors there are still only recorded on the
5842 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5843 connections (as happens on some IP stacks) was logged at start up time as
5844 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5845 it from "IPv6 and IPv4", which means that two separate sockets are being
5848 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5849 says whether AF_INET or AF_INET6 was passed as an argument.
5851 42. Exiwhat output was messed up when time zones were included in log
5854 43. Exiwhat now gives more information about the daemon's listening ports,
5855 and whether -tls-on-connect was used.
5857 44. The "port" option of the smtp transport is now expanded.
5859 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5860 silently ignored. Now an error message is written to the main and panic
5863 46. There's a new ACL modifier called "logwrite" which writes to a log file
5864 as soon as it is encountered.
5866 47. Added $local_user_uid and $local_user_gid at routing time.
5868 48. Exim crashed when trying to verify a sender address that was being
5871 49. Exim was recognizing only a space character after ".include". It now also
5872 recognizes a tab character.
5874 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5875 extracting the relevant information from the specification. The man page no
5876 longer contains scrambled data for the -d option, and I've added a section
5877 at the front about calling Exim under different names.
5879 51. Added "extra_headers" argument to the "mail" command in filter files.
5881 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5884 53. Installed eximstats 1.29.
5886 54. Added transport_filter_timeout as a generic transport option.
5888 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5889 Cc: header lines. This was required by RFC 822, but it not required by RFC
5892 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5893 incoming messages that did not have them. Now it does so only if the
5894 message originates locally, that is, if there is no associated remote host
5895 address. When Resent- header lines are present, this applies to the Resent-
5896 lines rather than the non-Resent- lines.
5898 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5899 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5901 58. Messages for configuration errors now include the name of the main
5902 configuration file - useful now that there may be more than one file in a
5903 list (.included file names were always shown).
5905 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5906 for those rare installations that do not start the daemon as root or run it
5907 setuid root. I've cut out the call to initgroups() if the daemon is not
5910 60. The Exim user and group can now be bound into the binary as text strings
5911 that are looked up at the start of Exim's processing.
5913 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5915 62. Added $mailstore_basename variable.
5917 63. Installed patch to sieve.c from Michael Haardt.
5919 64. When Exim failed to open the panic log after failing to open the main log,
5920 the original message it was trying to log was written to stderr and debug
5921 output, but if they were not available (the usual case in production), it
5922 was lost. Now it is written to syslog before the two lines that record the
5923 failures to open the logs.
5925 65. Users' Exim filters run in subprocesses under the user's uid. It is
5926 possible for a "deliver" command or an alias in a "personal" command to
5927 provoke an address rewrite. If logging of address rewriting is configured,
5928 this fails because the process is not running as root or exim. There may be
5929 a better way of dealing with this, but for the moment (because 4.30 needs
5930 to be released), I have disabled address rewrite logging when running a
5931 filter in a non-root, non-exim process.
5937 1. The buildconfig auxiliary program wasn't quoting the value set for
5938 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5939 not defined. This bug was masked in 4.22 by the effect that was fixed in
5942 2. Some messages that were rejected after a message id was allocated were
5943 shown as "incomplete" by exigrep. It no longer does this for messages that
5944 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5946 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5947 have allow_domain_literals set, the ID did not get logged in the <= line.
5948 Domain literals are now always recognized in Message-ID: header lines.
5950 4. The first argument for a ${extract expansion item is the key name or field
5951 number. Leading and trailing spaces in this item were not being ignored,
5952 causing some misleading effects.
5954 5. When deliver_drop_privilege was set, single queue runner processes started
5955 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5956 same command in the process it spins off) were not dropping privilege.
5958 6. When the daemon running as "exim" started a queue runner, it always
5959 re-executed Exim in the spun-off process. This is a waste of effort when
5960 deliver_drop_privilege is set. The new process now just calls the
5961 queue-runner function directly.
5967 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5970 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5971 ignored. Though the use of -oP was forcing the writing of a pid file, it
5972 was always written to the default place.
5974 3. If the message "no IP address found for host xxxx" is generated during
5975 incoming verification, it is now followed by identification of the incoming
5976 connection (so you can more easily find what provoked it).
5978 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5980 5. Added some features to "harden" Exim a bit more against certain attacks:
5982 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5983 be put in Local/Makefile. This is like the never_users runtime option,
5984 but it cannot be overridden. The default setting is "root".
5986 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5987 prefix string with which any file named in a -C command line option
5990 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5991 is retained for -C and -D only if the caller of Exim is root. Without
5992 it, the exim user may also use -C and -D and retain privilege.
5994 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5995 command line option is disabled.
5997 6. Macro names set by the -D option must start with an upper case letter, just
5998 like macro names defined in the configuration file.
6000 7. Added "dereference=" facility to LDAP.
6002 8. Two instances of the typo "uknown" in the source files are fixed.
6004 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6005 the Configure-Makefile script screwed up while processing it.
6007 10. Incorporated PCRE 4.4.
6009 11. The SMTP synchronization check was not operating right at the start of an
6010 SMTP session. For example, it could not catch a HELO sent before the client
6011 waited for the greeting. There is now a check for outstanding input at the
6012 point when the greeting is written. Because of the duplex, asynchronous
6013 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6014 way, but not yet received, when the check is performed.
6016 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6017 on TCP/IP sockets, because this apparently causes some broken clients to
6020 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6021 unchanged) from the Cygwin maintainer.
6023 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6024 was supported instead of testing for mbx. Effectively a typo.
6026 15. The spa authenticator server code was not checking that the input it
6027 received was valid base64.
6029 16. The debug output line for the "set" modifier in ACLs was not showing the
6030 name of the variable that was being set.
6032 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6034 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6035 lookup on its own. Something else was needed to trigger the lookup. For
6036 example, a match in host_lookup or the need for a host name in a host list.
6037 Now, if $sender_host_name is referenced and the host name has not yet been
6038 looked up, a lookup is performed. If the lookup fails, the variable remains
6039 empty, and $host_lookup_failed is set to "1".
6041 19. Added "eqi" as a case-independent comparison operator.
6043 20. The saslauthd authentication condition could segfault if neither service
6044 nor realm was specified.
6046 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6047 error message that was logged was misleading, and incoming SMTP
6048 connections were dropped. The message is now more accurate, and temporary
6049 errors are given to SMTP connections.
6051 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6052 (except RSET) with a 421 error, until QUIT is received. However, it was
6053 failing to send a response to QUIT.
6055 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6056 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6057 ACL is now run after the helo_try_verify_hosts code.
6059 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6060 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6061 case-independent, so other case variants are also recognized). Apparently
6062 some systems use these upper case variants.
6064 25. If more than two messages were waiting for the same host, and a transport
6065 filter was specified for the transport, Exim sent two messages over the
6066 same TCP/IP connection, and then failed with "socket operation on non-
6067 socket" when it tried to send the third.
6069 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6071 27. The extern definition of crypt16() in expand.c was not being excluded when
6072 the OS had its own crypt16() function.
6074 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6075 as a preferred synonym for return_size_limit, both as an option and as an
6078 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6080 30. Changed the default configuration ACL to relax the local part checking rule
6081 for addresses that are not in any local domains. For these addresses,
6082 slashes and pipe symbols are allowed within local parts, but the sequence
6083 /../ is explicitly forbidden.
6085 31. SPA server authentication was not clearing the challenge buffer before
6088 32. log_message in a "warn" ACL statement was writing to the reject log as
6089 well as to the main log, which contradicts the documentation and doesn't
6090 seem right (because no rejection is happening). So I have stopped it.
6092 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6093 However, I am unable to do any testing of this.
6095 34. Fixed an infelicity in the appendfile transport. When checking directories
6096 for a mailbox, to see if any needed to be created, it was accidentally
6097 using path names with one or more superfluous leading slashes; tracing
6098 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6100 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6101 contents are added to the log line that is written for every discarded
6102 recipient. (Previously a log_message setting was ignored.)
6104 36. The ${quote: operator now quotes the string if it is empty.
6106 37. The install script runs exim in order to find its version number. If for
6107 some reason other than non-existence or emptiness, which it checks, it
6108 could not run './exim', it was installing it with an empty version number,
6109 i.e. as "exim-". This error state is now caught, and the installation is
6112 38. An argument was missing from the function that creates an error message
6113 when Exim fails to connect to the socket for saslauthd authentication.
6114 This could cause Exim to crash, or give a corrupted message.
6116 39. Added isip, isip4, and isip6 to ${if conditions.
6118 40. The ACL variables $acl_xx are now saved with the message, and can be
6119 accessed later in routers, transports, and filters.
6121 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6122 strings in the file are not string-expanded.
6124 42. If a MAIL command specified a SIZE value that was too large to fit into an
6125 int variable, the check against message_size_limit failed. Such values are
6126 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6127 day this will have to be increased, but I don't think I want to be around
6128 when emails are that large.
6135 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6136 iconv() is not standard in FreeBSD.
6138 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6139 IPv6 enabled. The observed symptom was a segmentation fault on return from
6140 the function os_common_find_running_interfaces() in src/os.c.
6142 3. In the check_special_case() function in daemon.c I had used "errno" as an
6143 argument name, which causes warnings on some systems. This was basically a
6144 typo, since it was named "eno" in the comments!
6146 4. The code that waits for the clock to tick (at a resolution of some fraction
6147 of a second) so as to ensure message-id uniqueness was always waiting for
6148 at least one whole tick, when it could have waited for less. [This is
6149 almost certainly not relevant at current processor speeds, where it is
6150 unlikely to ever wait at all. But we try to future-proof.]
6152 5. The function that sleeps for a time interval that includes fractions of a
6153 second contained a race. It did not block SIGALRM between setting the
6154 timer, and suspending (a couple of lines later). If the interval was short
6155 and the sigsuspend() was delayed until after it had expired, the suspension
6156 never ended. On busy systems this could lead to processes getting stuck for
6159 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6160 process, before it forks any delivery processes. The open lookup caching
6161 mechanism meant that the open file or database connection was passed into
6162 the delivery process. The problem was that delivery processes always tidy
6163 up cached lookup data. This could cause a problem for the next delivery
6164 process started by the queue runner, because the external queue runner
6165 process does not know about the closure. So the next delivery process
6166 still has data in the lookup cache. In the case of a file lookup, there was
6167 no problem because closing a file descriptor in a subprocess doesn't affect
6168 the parent. However, if the lookup was caching a connection to a database,
6169 the connection was closed, and the second delivery process was likely to
6170 see errors such as "PGSQL: query failed: server closed the connection
6171 unexpectedly". The problem has been fixed by closing all cached lookups
6172 in a queue runner before running a delivery process.
6174 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6175 seem to have the "const" qualifier which it has on other OS. I've
6178 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6179 *of the same type* (client or server) with the same public name that an
6180 error should be diagnosed.
6182 9. When Exim looked up a host name for an IP address, but failed to find the
6183 original IP address when looking up the host name (a safety check), it
6184 output the message "<ip address> does not match any IP for NULL", which was
6185 confusing, to say the least. The bug was that the host name should have
6186 appeared instead of "NULL".
6188 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6189 user that is built into the binary, and the -C or -D options is used, root
6190 privilege is dropped before the configuration file is read. In addition,
6191 logging is switched to stderr instead of the normal log files. If the
6192 configuration then re-defines the Exim user, the unprivileged environment
6193 is probably not what is expected, so Exim logs a panic warning message (but
6196 However, if deliver_drop_privilege is set, the unprivileged state may well
6197 be exactly what is intended, so the warning has been cut out in that case,
6198 and Exim is allowed to try to write to its normal log files.
6204 1. smtp_return_error_details was not giving details for temporary sender
6205 or receiver verification errors.
6207 2. Diagnose a configuration error if two authenticators have the same public
6210 3. Exim used not to create the message log file for a message until the first
6211 delivery attempt. This could be confusing when incoming messages were held
6212 for policy or load reasons. The message log file is now created at the time
6213 the message is received, and an initial "Received" line is written to it.
6215 4. The automatically generated man page for command line options had a minor
6216 bug that caused no ill effects; however, a more serious problem was that
6217 the procedure for building the man page automatically didn't always
6218 operate. Consequently, release 4.20 contains an out-of-date version. This
6219 shouldn't happen again.
6221 5. When building Exim with embedded Perl support, the script that builds the
6222 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6223 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6225 6. The freeze_tell option was not being used for messages that were frozen on
6226 arrival, either by an ACL or by local_scan().
6228 7. Added the smtp_incomplete_transaction log selector.
6230 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6231 was accepting AUTH without a new EHLO.
6233 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6234 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6237 10. Logging of TCP/IP connections (when configured) now happens in the main
6238 daemon process instead of the child process, so that the TCP/IP connection
6239 count is more accurate (but it can never be perfect).
6241 11. The use of "drop" in a nested ACL was not being handled correctly in the
6242 outer ACL. Now, if condition failure induced by the nested "drop" causes
6243 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6244 or "require"), the connection is dropped.
6246 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6247 that yield "discard" can now be used with an "accept" or a "discard" verb,
6248 but an error is generated for any others (because I can't see a useful way
6249 to define what should happen).
6251 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6252 are now processed in the same way as lines in the Exim configuration file.
6253 In particular, continuation lines are supported.
6255 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6257 15. Added -ti meaning -t -i.
6259 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6260 domains, and warn by logging if others are found.
6262 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
6263 returned from GIFCONF when Exim is trying to find the list of interfaces on
6264 a host. The code in os.c has been modified to copy each ifreq to an aligned
6265 structure in all cases.
6267 Also, in some cases, the returned ifreq's were being copied to a 'struct
6268 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6269 means the last couple of bytes of an IPv6 address could be chopped if the
6270 ifreq contained only a normal sockaddr (14 bytes storage).
6272 18. Named domain lists were not supported in the hosts_treat_as_local option.
6273 An entry such as +xxxx was not recognized, and was treated as a literal
6276 19. Ensure that header lines added by a DATA ACL are included in the reject log
6277 if the ACL subsequently rejects the message.
6279 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6280 MD5 (which is deprecated).
6282 21. When testing a filter file using -bf, Exim was writing a message when it
6283 took the sender from a "From " line in the message, but it was not doing so
6284 when it took $return_path from a Return-Path: header line. It now does.
6286 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6287 with a valid header line field name (a series of printing characters
6288 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6290 23. Changed "disc" in the source to "disk" to conform to the documentation and
6291 the book and for uniformity.
6293 24. Ignore Sendmail's -Ooption=value command line item.
6295 25. When execve() failed while trying to run a command in a pipe transport,
6296 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
6297 could be confused with a return value of 69 from the command itself. This
6298 has been changed to 127, the value the shell returns if it is asked to run
6299 a non-existent command. The wording for the related log line suggests a
6300 non-existent command as the problem.
6302 26. If received_header_text expands to an empty string, do not add a Received:
6303 header line to the message. (Well, it adds a token one on the spool, but
6304 marks it "old" so that it doesn't get used or transmitted.)
6306 27. Installed eximstats 1.28 (addition of -nt option).
6308 28. There was no check for failure on the call to getsockname() in the daemon
6309 code. This can fail if there is a shortage of resources on the system, with
6310 ENOMEM, for example. A temporary error is now given on failure.
6312 29. Contrary to the C standard, it seems that in some environments, the
6313 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6314 program. Exim now does this explicitly; it affects the formatting of
6315 timestamps using strftime().
6317 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6318 complaints. I've now initialized all the variables, to avoid this.
6320 32. Header lines added by a system filter were not being "seen" during
6321 transport-time rewrites.
6323 33. The info_callback() function passed to OpenSSL is set up with type void
6324 (*)(SSL *, int, int), as described somewhere. However, when calling the
6325 function (actually a macro) that sets it up, the type void(*)() is
6326 expected. I've put in a cast to prevent warnings from picky compilers.
6328 34. If a DNS black list lookup found a CNAME record, but there were no A
6329 records associated with the domain it pointed at, Exim crashed.
6331 35. If a DNS black list lookup returned more than one A record, Exim ignored
6332 all but the first. It now scans all returned addresses if a particular IP
6333 value is being sought. In this situation, the contents of the
6334 $dnslist_value variable are a list of all the addresses, separated by a
6337 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6338 to accept a host name and all its aliases if the forward lookup for any of
6339 them yielded the IP address of the incoming connection. Now it accepts only
6340 those names whose forward lookup yields the correct IP address. Any other
6341 names are discarded. This closes a loophole whereby a rogue DNS
6342 administrator could create reverse DNS records to break through a
6343 wildcarded host restriction in an ACL.
6345 37. If a user filter or a system filter that ran in a subprocess used any of
6346 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6347 the wrong values were passed to the pipe command ($thisaddress had the
6348 value of $0, $0 had the value of $1, etc). This bug was introduced by
6349 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6351 38. Improved the line breaking for long SMTP error messages from ACLs.
6352 Previously, if there was no break point between 40 and 75 characters, Exim
6353 left the rest of the message alone. Two changes have been made: (a) I've
6354 reduced the minimum length to 35 characters; (b) if it can't find a break
6355 point between 35 and 75 characters, it looks ahead and uses the first one
6356 that it finds. This may give the occasional overlong line, but at least the
6357 remaining text gets split now.
6359 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6360 file descriptors might be low, and that setting 1000 would always raise it.
6361 It turns out that in some environments, the limit is already over 1000 and
6362 that lowering it causes trouble. So now Exim takes care not to decrease it.
6364 40. When delivering a message, the value of $return_path is set to $sender_
6365 address at the start of routing (routers may change the value). By an
6366 oversight, this default was not being set up when an address was tested by
6367 -bt or -bv, which affected the outcome if any router or filter referred to
6370 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6371 log only when "message" or "log_message" are set. However, if one of the
6372 conditions was an address verification, or a call to a nested ACL, the
6373 messages generated by the underlying test were being passed through. This
6374 no longer happens. The underlying message is available in $acl_verify_
6375 message for both "message" and "log_message" expansions, so it can be
6376 passed through if needed.
6378 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6379 new expansion $bh_ to give the encoded byte string without charset
6380 translation. Translation happens only if iconv() is available; HAVE_ICONV
6381 indicates this at build time. HEADERS_CHARSET gives the charset to
6382 translate to; headers_charset can change it in the configuration, and
6383 "headers charset" can change it in an individual filter file.
6385 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6386 that creates RFC 2047 encoded "words" labels them as that charset instead
6387 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6388 expansion operator; (ii) when Exim creates a From: line for a local
6389 message; (iii) when a header line is rewritten to include a "phrase" part.
6391 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6392 buggy, causing it to skip the first lines of messages whose message ID
6393 ended in 'D'. This would not have bitten before Exim release 4.14, because
6394 message IDs were unlikely to end in 'D' before then. The effect was to have
6395 incorrect size information for certain domains.
6397 45. #include "config.h" was missing at the start of the crypt16.c module. This
6398 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6401 46. If there was a timeout during a "random" callout check, Exim treated it as
6402 a failure of the random address, and carried on sending RSET and the real
6403 address. If the delay was just some slowness somewhere, the response to the
6404 original RCPT would be taken as a response to RSET and so on, causing
6405 mayhem of various kinds.
6407 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6408 when I implemented it. It didn't allow for the fact that some option values
6409 may legitimatetly be negative (e.g. size_addition), and it didn't even do
6410 the right test for positive values.
6412 48. Domain names in DNS records are case-independent. Exim always looks them up
6413 in lower case. Some resolvers return domain names in exactly the case they
6414 appear in the zone file, that is, they may contain uppercase letters. Not
6415 all resolvers do this - some return always lower case. Exim was treating a
6416 change of case by a resolver as a change of domain, similar to a widening
6417 of a domain abbreviation. This triggered its re-routing code and so it was
6418 trying to route what was effectively the same domain again. This normally
6419 caused routing to fail (because the router wouldn't handle the domain
6420 twice). Now Exim checks for this case specially, and just changes the
6421 casing of the domain that it ultimately uses when it transmits the message
6424 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6427 50. If a filter generated a file delivery with a non-absolute name (possible if
6428 no home directory exists for the router), the forbid_file option was not
6431 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6432 the existing equality matching.
6434 52. Exim was using ints instead of ino_t variables in some places where it was
6435 dealing with inode numbers.
6437 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6438 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6439 called TMPDIR, and if it finds it is different, it changes its value.
6441 54. The smtp_printf() function is now made available to local_scan() so
6442 additional output lines can be written before returning. There is also an
6443 smtp_fflush() function to enable the detection of a dropped connection.
6444 The variables smtp_input and smtp_batched_input are exported to
6447 55. Changed the default runtime configuration: the message "Unknown user"
6448 has been removed from the ACL, and instead placed on the localuser router,
6449 using the cannot_route_message feature. This means that any verification
6450 failures that generate their own messages won't get overridden. Similarly,
6451 the "Unrouteable address" message that was in the ACL for unverifiable
6452 relay addresses has also been removed.
6454 56. Added hosts_avoid_esmtp to the smtp transport.
6456 57. The exicyclog script was not checking for the esoteric option
6457 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6458 will work only if exicyclog is run under the appropriate euid.
6460 58. Following a discussion on the list, the rules by which Exim recognises line
6461 endings on incoming messages have been changed. The -dropcr and drop_cr
6462 options are now no-ops, retained only for backwards compatibility. The
6463 following line terminators are recognized: LF CRLF CR. However, special
6464 processing applies to CR:
6466 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6467 nor a local message in the state where . is a terminator.
6469 (ii) If a bare CR is encountered in a header line, an extra space is added
6470 after the line terminator so as not to end the header. The reasoning
6471 behind this is that bare CRs in header lines are most likely either
6472 to be mistakes, or people trying to play silly games.
6474 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6475 was being incorrectly given as 18 bytes larger than it should have been.
6476 This is a VOB (very old bug).
6478 60. This may never have affected anything current, but just in case it has:
6479 When the local host is found other than at the start of a list of hosts,
6480 the local host, those with the same MX, and any that follow, are discarded.
6481 When the list in question was part of a longer list of hosts, the following
6482 hosts (not currently being processed) were also being discarded. This no
6483 longer happens. I'm not sure if this situation could ever has previously
6486 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6489 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6490 header. This is something that is recommended in a new Internet Draft, and
6491 is something that is documented as being done by Sendmail. There are two
6492 possible values. For messages generated by the autoreply transport, Exim
6495 Auto-Submitted: auto-replied
6497 whereas for all other generated messages (e.g. bounces) it adds
6499 Auto-Submitted: auto-generated
6501 63. The "personal" condition in filters now includes a test for the
6502 Auto-Submitted: header. If it contains the string "auto-" the message it
6503 not considered personal.
6505 64. Added rcpt_include_affixes as a generic transport option.
6507 65. Added queue_only_override (default true).
6509 66. Added the syslog_duplication option.
6511 67. If what should have been the first header line of a message consisted of
6512 a space followed by a colon, Exim was mis-interpreting it as a header line.
6513 It isn't of course - it is syntactically invalid and should therefore be
6514 treated as the start of the message body. The misbehaviour could have
6515 caused a number of strange effects, including loss of data in subsequent
6516 header lines, and spool format errors.
6518 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6519 client host had authenticated. This control can now be exercised by an ACL
6520 for more flexibility.
6522 69. By default, callouts do not happen when testing with -bh. There is now a
6523 variant, -bhc, which does actually run the callout code, including
6524 consulting and updating the callout cache.
6526 70. Added support for saslauthd authentication, courtesy of Alexander
6529 71. If statvfs() failed on the spool or log directories while checking their
6530 size for availability, Exim confusingly gave the error "space shortage".
6531 Furthermore, in debugging mode it crashed with a floating point exception.
6532 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6533 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6534 serious problem, Exim now writes to the main and panic logs when this
6535 happens, with details of the failure. It then refuses to accept the
6536 incoming message, giving the message "spool directory problem" or "log
6537 directory problem" with a 421 code for SMTP messages.
6539 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6540 0, 1, and 2 exist, because some OS complain for execs without them (see
6541 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6542 descriptors. However, the code omitted to check that the open succeeded,
6543 causing mysterious errors if for some reason the permissions on /dev/null
6544 got screwed. Now Exim writes a message to the main and panic logs, and
6545 bombs out if it can't open /dev/null.
6547 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6548 interact so that it is all more flexible. It is supposed to remain
6549 backwards compatible. Also added extra_local_interfaces.
6551 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6552 to bomb out with an assertion failure - to the client this appears as a
6553 connection drop. This problem occurs in the part of the code that was taken
6554 from the Samba project. Fortunately, the assertion is in a very simple
6555 function, so I have fixed this by reproducing the function inline in the
6556 one place where it is called, and arranging for authentication to fail
6557 instead of killing the process with assert().
6559 75. The SPA client code was not working when the server requested OEM rather
6560 than Unicode encoding.
6562 76. Added code to make require_files with a specific uid setting more usable in
6563 the case where statting the file as root fails - usually a non-root-mounted
6564 NFS file system. When this happens and the failure is EACCES, Exim now
6565 forks a subprocess and does the per-uid checking as the relevant uid.
6567 77. Added process_log_path.
6569 78. If log_file_path was not explicitly set, a setting of check_log_space or
6570 check_log_inodes was ignored.
6572 79. If a space check for the spool or log partitions fails, the incident is now
6573 logged. Of course, in the latter case the data may get lost...
6575 80. Added the %p formatting code to string_format() so that it can be used to
6576 print addresses in debug_print(). Adjusted all the address printing in the
6577 debugging in store.c to use %p rather than %d.
6579 81. There was a concern that a line of code in smtp_in.c could overflow a
6580 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6581 initially expressed, the concern was not well-founded, because trailing
6582 spaces are removed early. However, if the trailing spaces were followed by
6583 a NULL, they did not get removed, so the overflow was possible. Two fixes
6586 (a) I re-wrote the offending code in a cleaner fashion.
6587 (b) If an incoming SMTP command contains a NULL character, it is rejected
6590 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6591 runs initgroups(), so that if the Exim user is in any additional groups,
6592 they will be used during message reception.
6598 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob