1 Change log file for Exim from version 4.21
2 -------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
9 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
10 supports it and a size is available (ie. the sending peer gave us one).
12 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
13 years of being deprecated). The replacements are the ACLs
14 acl_smtp_mime and acl_not_smtp_mime.
16 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
17 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
18 or even an in-clear connection were permitted. Now, if the host lookup
19 was dnssec and dane was requested then the host is only used if the
20 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
21 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
22 if one fails this test.
23 This means that a poorly-configured remote DNS will make it incommunicado;
24 but it protects against a DNS-interception attack on it.
26 JH/04 Bug 1810: make continued-use of an open smtp transport connection
27 non-noisy when a race steals the message being considered.
29 JH/05 If main configuration option tls_certificate is unset, generate a
30 self-signed certificate for inbound TLS connections.
32 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
33 in rewrites and routers.
35 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
36 and logged a warning sing 4.83; now they are a configuration file error.
38 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
39 (lacking @domain). Apply the same qualification processing as RCPT.
41 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
43 JH/10 Support ${sha256:} applied to a string (as well as the previous
46 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
47 a cutthrough deliver is pending, as we always want to make a connection.
48 This also avoids re-routing the message when later placing the cutthrough
49 connection after a verify cache hit.
50 Do not update it with the verify result either.
52 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
53 when routing results in more than one destination address.
55 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
56 signing (which inhibits the cutthrough capability). Previously only
57 the presence of an option was tested; now an expansion evaluating as
58 empty is permissible (obviously it should depend only on data available
59 when the cutthrough connection is made).
61 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
62 the relevant preceding SMTP command did not note the pipelining mode.
64 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
65 Previously they were not counted.
67 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
68 as one having no matching records. Previously we deferred the message
69 that needed the lookup.
71 JH/17 Fakereject: previously logged as a norml message arrival "<="; now
72 distinguished as "(=".
74 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
75 for missing MX records. Previously it only worked for missing A records.
77 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
79 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
80 after the data-go-ahead and data-ack. Patch from Jason Betts.
82 JH/21 Bug 1846: Send DMARC forensic reports for reject and quaratine results,
83 even for a "none" policy. Patch from Tony Meyer.
85 JH/22 Fix continued use of a connection for further deliveries. If a port was
86 specified by a router, it must also match for the delivery to be
89 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
90 When one of the recipients of a message was unsuitable for the connection
91 (has no matching addresses), we lost track of needing to mark it
92 deferred. As a result mail would be lost.
94 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
96 JH/25 Decoding ACL controls is now done using a binary search; the source code
97 takes up less space and should be simpler to maintain. Merge the ACL
98 condition decode tables also, with similar effect.
100 JH/26 Fix problem with one_time used on a redirect router which returned the
101 parent address unchanged. A retry would see the parent address marked as
102 delivered, so not attempt the (identical) child. As a result mail would
105 JH/27 Fix a possible security hole, wherein a process operating with the Exim
106 UID can gain a root shell. Credit to http://www.halfdog.net/ for
107 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
110 JH/28 Enable {spool,log} filesystem space and inode checks as default.
111 Main config options check_{log,spool}_{inodes,space} are now
112 100 inodes, 10MB unless set otherwise in the configuration.
114 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
115 Previously it only applied to the main-section connection policy
118 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
120 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
121 by me. Added RFC7919 DH primes as an alternative.
123 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
124 are not in the system include path.
126 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
127 GnuTLS, when a session startup failed (eg because the client disconnected)
128 Exim did stdio operations after fclose. This was exposed by a recent
129 change which nulled out the file handle after the fclose.
131 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
132 signed directly by the cert-signing cert, rather than an intermediate
133 OCSP-signing cert. This is the model used by LetsEncrypt.
135 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
137 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
138 an incoming connection.
140 HS/02 Bug 1802: Do not half-close the connection after sending a request
146 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
147 and 3.4.4 - once the server is enabled to respond to an OCSP request
148 it does even when not requested, resulting in a stapling non-aware
149 client dropping the TLS connection.
151 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
152 support variable-length bit vectors. No functional change.
154 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
155 The I= interface field on outgoing lines is now after the H= remote
156 host field, same as incoming lines. There is a separate
157 outgoing_interface log selector which allows you to disable the
160 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
161 If not running log_selector +smtp_connection the mainlog would be held
162 open indefinitely after a "too many connections" event, including to a
163 deleted file after a log rotate. Leave the per net connection logging
164 leaving it open for efficiency as that will be quickly detected by the
165 check on the next write.
167 HS/01 Bug 1671: Fix post transport crash.
168 Processing the wait-<transport> messages could crash the delivery
169 process if the message IDs didn't exist for some reason. When
170 using 'split_spool_directory=yes' the construction of the spool
171 file name failed already, exposing the same netto behaviour.
173 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
174 mime_regex ACL conditions.
176 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
177 to DSN fail messages (bounces): remote IP, remote greeting, remote response
178 to HELO, local diagnostic string.
180 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
181 log line to debug. Even when configured with a tls authenticator many
182 client connections are expected to not authenticate in this way, so
183 an authenticate fail is not an error.
185 HS/02 Add the Exim version string to the process info. This way exiwhat
186 gives some more detail about the running daemon.
188 JH/06 Bug 1395: time-limit cacheing of DNS lookups, to the TTL value. This may
189 matter for fast-change records such as DNSBLs.
191 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
192 retry record, even if constant. There may be multiple transports with
193 different interface settings and the retry behaviour needs to be kept
196 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
198 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
200 JH/10 Bug 840: fix log_defer_output option of pipe transport
202 JH/11 Bug 830: use same host for all RCPTS of a message, even under
203 hosts_randomize. This matters a lot when combined with mua_wrapper.
205 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
206 ${quote_pgsql:<string>} operator.
208 JH/13 Bug 1708: avoid misaligned access in cached lookup.
210 JH/14 Change header file name for freeradius-client. Relevant if compiling
211 with Radius support; from the Gentoo tree and checked under Fedora.
213 JH/15 Bug 1712: Introduce $prdr_requested flag variable
215 JH/16 Bug 1714: Permit an empty string as expansion result for transport
216 option transport_filter, meaning no filtering.
218 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
220 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
221 defaults to "*" (all hosts). The variable is now available when not built
222 with TLS, default unset, mainly to enable keeping the testuite sane.
223 If a server certificate is not supplied (via tls_certificate) an error is
224 logged, and clients will find TLS connections fail on startup. Presumably
225 they will retry in-clear.
226 Packagers of Exim are strongly encouraged to create a server certificate
227 at installation time.
229 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
230 with the $config_file variable.
232 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
233 in transport context, after the attempt, and per-recipient. The latter type
234 is per host attempted. The event data is the error message, and the errno
235 information encodes the lookup type (A vs. MX) used for the (first) host,
236 and the trailing two digits of the smtp 4xx reponse.
238 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
239 to write to mainlog (or rejectlog, paniclog) in the window between file
240 creation and permissions/ownership being changed. Particularly affects
241 installations where exicyclog is run as root, rather than exim user;
242 result is that the running daemon panics and dies.
244 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
246 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
247 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
248 "pri" and "weight". Note that the previous implicit priority given by the
249 list order is no longer honoured.
251 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalisation
254 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
255 by defining SUPPORT_SOCKS.
257 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
258 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
259 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
260 variables are renamed to proxy_{local,external}_{address,port}.
262 JH/27 Move Internationalisation support from Experimental to mainline, enabled
263 for a build by defining SUPPORT_I18N
265 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
266 of the query string, and make ${quote_redis:} do that quoting.
268 JH/29 Move Events support from Experimental to mainline, enabled by default
269 and removable for a build by defining DISABLE_EVENT.
271 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
273 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
274 cached by the daemon.
276 JH/32 Move Redis support from Experimental to mainline, enabled for a build
277 by defining LOOKUP_REDIS. The libhiredis library is required.
279 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
280 keys are given for lookup.
282 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
283 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
284 only supported when built with TLS support. The PolarSSL SHA routines
285 are still used when the TLS library is too old for convenient support.
287 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
288 openssl_options), for security. OpenSSL forces this from version 1.1.0
289 server-side so match that on older versions.
291 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
292 allocation for $value could be released as the expansion processing
293 concluded, but leaving the global pointer active for it.
295 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
296 and to use the domains and local_parts ACL conditions.
298 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
299 incorrectly not doubled on cutthrough transmission, hence seen as a
300 body-termination at the receiving system - resulting in truncated mails.
301 Commonly the sender saw a TCP-level error, and retransmitted the message
302 via the normal store-and-forward channel. This could result in duplicates
303 received - but deduplicating mailstores were liable to retain only the
304 initial truncated version.
306 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
308 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
310 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
311 we're in there, support oversigning also; bug 1309.
313 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
315 HS/04 Add support for keep_environment and add_environment options.
317 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
318 either intentional arithmetic overflow during PRNG, or testing config-
321 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
322 delivery resulted in actual delivery. Cancel cutthrough before DATA
325 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
326 rejects a recipient: pass the reject to the originator.
328 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
329 Many were false-positives and ignorable, but it's worth fixing the
332 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
333 for the new environment-manipulation done at startup. Move the routines
334 from being local to tls.c to being global via the os.c file.
336 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
337 an extract embedded as result-arg for a map, the first arg for extract
338 is unavailable so we cannot tell if this is a numbered or keyed
339 extraction. Accept either.
345 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
348 JH/02 The smtp transport option "multi_domain" is now expanded.
350 JH/03 The smtp transport now requests PRDR by default, if the server offers
353 JH/04 Certificate name checking on server certificates, when exim is a client,
354 is now done by default. The transport option tls_verify_cert_hostnames
355 can be used to disable this per-host. The build option
356 EXPERIMENTAL_CERTNAMES is withdrawn.
358 JH/05 The value of the tls_verify_certificates smtp transport and main options
359 default to the word "system" to access the system default CA bundle.
360 For GnuTLS, only version 3.0.20 or later.
362 JH/06 Verification of the server certificate for a TLS connection is now tried
363 (but not required) by default. The verification status is now logged by
364 default, for both outbound TLS and client-certificate supplying inbound
367 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
370 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
371 Status Notification (bounce) messages are now MIME format per RFC 3464.
372 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
373 under the control of the dsn_advertise_hosts option, and routers may
374 have a dsn_lasthop option.
376 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
377 default, modifiable by a malware= option. The list separator for
378 the options can now be changed in the usual way. Bug 68.
380 JH/10 The smtp_receive_timeout main option is now expanded before use.
382 JH/11 The incoming_interface log option now also enables logging of the
383 local interface on delivery outgoing connections.
385 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
386 if the interface and destination host and port all match.
388 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
391 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
392 Patch from Andrew Lewis.
394 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
395 now supports optional time-restrictions, weighting, and priority
396 modifiers per server. Patch originally by <rommer@active.by>.
398 JH/16 The spamd_address main option now supports a mixed list of local
399 and remote servers. Remote servers can be IPv6 addresses, and
400 specify a port-range.
402 JH/17 Bug 68: The spamd_address main option now supports an optional
403 timeout value per server.
405 JH/18 Bug 1581: Router and transport options headers_add/remove can
406 now have the list separator specified.
408 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
411 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
414 JH/21 Support for the A6 type of dns record is withdrawn.
416 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
417 rather than the verbs used.
419 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
420 from 255 to 1024 chars.
422 JH/24 Verification callouts now attempt to use TLS by default.
424 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
425 are generic router options now. The defaults didn't change.
427 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
428 Original patch from Alexander Shikoff, worked over by JH.
430 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
431 files if ZCAT_COMMAND is not executable.
433 JH/26 Bug 1539: Add timout/retry options on dnsdb lookups.
435 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
437 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
438 Normally benign, it bites when the pair was led to by a CNAME;
439 modern usage is to not canoicalize the domain to a CNAME target
440 (and we were inconsistent anyway for A-only vs AAAA+A).
442 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
444 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
445 when evaluating $sender_host_dnssec.
447 JH/31 Check the HELO verification lookup for DNSSEC, adding new
448 $sender_helo_dnssec variable.
450 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
452 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
454 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
456 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
457 documented as working, but never had. Support all but $spam_report.
459 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
460 added for tls authenticator.
462 HS/03 Add perl_taintmode main config option
467 TL/01 When running the test suite, the README says that variables such as
468 no_msglog_check are global and can be placed anywhere in a specific
469 test's script, however it was observed that placement needed to be near
470 the beginning for it to behave that way. Changed the runtest perl
471 script to read through the entire script once to detect and set these
472 variables, reset to the beginning of the script, and then run through
473 the script parsing/test process like normal.
475 TL/02 The BSD's have an arc4random API. One of the functions to induce
476 adding randomness was arc4random_stir(), but it has been removed in
477 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
478 function when detected.
480 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
481 cause callback expansion.
483 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
484 syntax errors in an expansion can be treated as a string instead of
485 logging or causing an error, due to the internal use of bool_lax
486 instead of bool when processing it.
488 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
489 server certificates when making smtp deliveries.
491 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
493 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
495 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
497 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
498 Merged patch from Sebastian Wiedenroth.
500 JH/05 Fix results-pipe from transport process. Several recipients, combined
501 with certificate use, exposed issues where response data items split
502 over buffer boundaries were not parsed properly. This eventually
503 resulted in duplicates being sent. This issue only became common enough
504 to notice due to the introduction of conection certificate information,
505 the item size being so much larger. Found and fixed by Wolfgang Breyha.
507 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
508 size buffer was used, resulting in syntax errors when an expansion
511 JH/07 Add support for directories of certificates when compiled with a GnuTLS
512 version 3.3.6 or later.
514 JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef
515 is EXPERIMENTAL_EVENT, the main-configuration and transport options
516 both become "event_action", the variables become $event_name, $event_data
517 and $event_defer_errno. There is a new variable $verify_mode, usable in
518 routers, transports and related events. The tls:cert event is now also
519 raised for inbound connections, if the main configuration event_action
522 TL/06 In test suite, disable OCSP for old versions of openssl which contained
523 early OCSP support, but no stapling (appears to be less than 1.0.0).
525 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
526 server certificate names available under the smtp transport option
527 "tls_verify_cert_hostname" now do not permit multi-component wildcard
530 JH/10 Time-related extraction expansions from certificates now use the main
531 option "timezone" setting for output formatting, and are consistent
532 between OpenSSL and GnuTLS compilations. Bug 1541.
534 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
535 encoded parameter in the incoming message. Bug 1558.
537 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
538 include certificate info, eximon was claiming there were spoolfile
541 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
543 JH/14 Log delivery-related information more consistently, using the sequence
544 "H=<name> [<ip>]" wherever possible.
546 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
547 are problematic for Debian distribution, omit them from the release
550 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
552 JH/16 Fix string representation of time values on 64bit time_t anchitectures.
555 JH/17 Fix a null-indirection in certextract expansions when a nondefault
556 output list separator was used.
561 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
562 checkers that were complaining about end of non-void function with no
565 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
566 This was a regression intruduced in 4.83 by another bugfix.
568 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
570 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
571 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
577 TF/01 Correctly close the server side of TLS when forking for delivery.
579 When a message was received over SMTP with TLS, Exim failed to clear up
580 the incoming connection properly after forking off the child process to
581 deliver the message. In some situations the subsequent outgoing
582 delivery connection happened to have the same fd number as the incoming
583 connection previously had. Exim would try to use TLS and fail, logging
584 a "Bad file descriptor" error.
586 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
587 utilities have not been installed.
589 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
590 temporary space as the ACL may create new global variables.
592 TL/01 LDAP support uses per connection or global context settings, depending
593 upon the detected version of the libraries at build time.
595 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
596 to extract and use the src ip:port in logging and expansions as if it
597 were a direct connection from the outside internet. PPv2 support was
598 updated based on HAProxy spec change in May 2014.
600 JH/02 Add ${listextract {number}{list}{success}{fail}}.
602 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
603 Properly escape header and check for NULL return.
605 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
608 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
610 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
611 characters in header names, implemented as a verify condition.
612 Contributed by Michael Fischer v. Mollard.
614 TL/05 Rename SPF condition results err_perm and err_temp to standardized
615 results permerror and temperror. Previous values are deprecated but
616 still accepted. In a future release, err_perm and err_temp will be
617 completely removed, which will be a backward incompatibility if the
618 ACL tests for either of these two old results. Patch contributed by
619 user bes-internal on the mailing list.
621 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
623 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
624 selectors, in both main and reject logs.
626 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
629 JH/07 Add malware type "sock" for talking to simple daemon.
631 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
633 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
634 routers/transports under cutthrough routing.
636 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
637 numbers. Touch up "bool" conditional to keep the same definition.
639 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
641 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
643 JH/12 Expand items in router/transport headers_add or headers_remove lists
644 individually rather than the list as a whole. Bug 1452.
646 Required for reasonable handling of multiple headers_ options when
647 they may be empty; requires that headers_remove items with embedded
648 colons must have them doubled (or the list-separator changed).
650 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
651 view the policy declared in the DMARC record. Currently, $dmarc_status
652 is a combined value of both the record presence and the result of the
655 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
657 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
658 dnslookup router and the smtp transport (applying to the forward
661 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
662 of ldap servers used for a specific lookup. Patch provided by Heiko
665 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
666 New variable $lookup_dnssec_authenticated for observability.
668 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
669 Patch submitted by Lars Timman.
671 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
673 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
674 Requires trusted mode and valid format message id, aborts otherwise.
675 Patch contributed by Heiko Schlichting.
677 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
678 certextract with support for various fields. Bug 1358.
680 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
681 is requested by default, modifiable by smtp transport option
684 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
685 operate on certificate variables to give certificate fingerprints
686 Also new ${sha256:cert_variable}.
688 JH/23 The PRDR feature is moved from being Experimental into the mainline.
690 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
691 Christian Aistleitner.
693 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
695 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
696 file. Patch from Wolfgang Breyha.
698 JH/25 Expand the coverage of the delivery $host and $host_address to
699 client authenticators run in verify callout. Bug 1476.
701 JH/26 Port service names are now accepted for tls_on_connect_ports, to
702 align with daemon_smtp_ports. Bug 72.
704 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
705 support and error reporting did not work properly.
707 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
708 and is readable. Patch from Andrew Colin Kissa.
710 TL/14 Enhance documentation of ${run expansion and how it parses the
711 commandline after expansion, particularly in the case when an
712 unquoted variable expansion results in an empty value.
714 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
716 PP/02 Fix internal collision of T_APL on systems which support RFC3123
717 by renaming away from it. Addresses GH issue 15, reported by
720 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
722 TL/15 SECURITY: prevent double expansion in math comparison functions
723 (can expand unsanitized data). Not remotely exploitable.
730 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
732 PP/02 Make -n do something, by making it not do something.
733 When combined with -bP, the name of an option is not output.
735 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
738 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
739 $sender_host_name and config options to manage this, and basic check
742 PP/05 DSCP support for outbound connections and control modifier for inbound.
744 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
745 (Only plugin which currently uses this is kerberos4, which nobody should
746 be using, but we should make it available and other future plugins might
747 conceivably use it, even though it would break NAT; stuff *should* be
748 using channel bindings instead).
750 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
751 name; added for Sendmail compatibility; requires admin caller.
752 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
753 just ignore it); requires trusted caller.
754 Also parse but ignore: -Ac -Am -X<logfile>
757 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
759 TL/02 Add +smtp_confirmation as a default logging option.
761 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
762 Patch by Magnus Holmgren from 2007-02-20.
764 TL/04 Bugzilla 1281 - Spec typo.
765 Bugzilla 1283 - Spec typo.
766 Bugzilla 1290 - Spec grammar fixes.
768 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
770 TL/06 Add Experimental DMARC support using libopendmarc libraries.
772 TL/07 Fix an out of order global option causing a segfault. Reported to dev
773 mailing list by by Dmitry Isaikin.
775 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
777 JH/02 Support "G" suffix to numbers in ${if comparisons.
779 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
781 NM/01 Bugzilla 1197 - Spec typo
782 Bugzilla 1196 - Spec examples corrections
784 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
786 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
787 gnutls_enable_pkcs11, but renamed to more accurately indicate its
790 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
791 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
793 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
794 "acl {{name}{arg}...}", and optional args on acl condition
797 JH/05 Permit multiple router/transport headers_add/remove lines.
799 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
801 JH/07 Avoid using a waiting database for a single-message-only transport.
802 Performance patch from Paul Fisher. Bugzilla 1262.
804 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
807 JH/09 Add $headers_added variable, with content from use of ACL modifier
808 add_header (but not yet added to the message). Bugzilla 199.
810 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
811 Pulled from Bugzilla 817 by Wolfgang Breyha.
813 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
815 (nb: this is the same fix as in Exim 4.80.1)
817 JH/11 Add A= logging on delivery lines, and a client_set_id option on
820 JH/12 Add optional authenticated_sender logging to A= and a log_selector
823 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
825 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
826 advertise SMTP AUTH mechanism to us, instead of a generic
827 protocol violation error. Also, make Exim more robust to bad
828 data from the Dovecot auth socket.
830 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
832 When a queue runner is handling a message, Exim first routes the
833 recipient addresses, during which it prunes them based on the retry
834 hints database. After that it attempts to deliver the message to
835 any remaining recipients. It then updates the hints database using
838 So if a recipient address works intermittently, it can get repeatedly
839 deferred at routing time. The retry hints record remains fresh so the
840 address never reaches the final cutoff time.
842 This is a fairly common occurrence when a user is bumping up against
843 their storage quota. Exim had some logic in its local delivery code
844 to deal with this. However it did not apply to per-recipient defers
845 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
847 This change adds a proper retry rule check during routing so that the
848 final cutoff time is checked against the message's age. We only do
849 this check if there is an address retry record and there is not a
850 domain retry record; this implies that previous attempts to handle
851 the address had the retry_use_local_parts option turned on. We use
852 this as an approximation for the destination being like a local
853 delivery, as in LMTP.
855 I suspect this new check makes the old local delivery cutoff check
856 redundant, but I have not verified this so I left the code in place.
858 TF/02 Correct gecos expansion when From: is a prefix of the username.
860 Test 0254 submits a message to Exim with the header
864 When I ran the test suite under the user fanf2, Exim expanded
865 the header to contain my full name, whereas it should have added
866 a Resent-Sender: header. It erroneously treats any prefix of the
867 username as equal to the username.
869 This change corrects that bug.
871 GF/01 DCC debug and logging tidyup
872 Error conditions log to paniclog rather than rejectlog.
873 Debug lines prefixed by "DCC: " to remove any ambiguity.
875 TF/03 Avoid unnecessary rebuilds of lookup-related code.
877 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
878 Bug spotted by Jeremy Harris; was flawed since initial commit.
879 Would have resulted in OCSP responses post-SNI triggering an Exim
880 NULL dereference and crash.
882 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
884 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
885 Bug detection, analysis and fix by Samuel Thibault.
886 Bugzilla 1331, Debian bug #698092.
888 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
890 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
891 Server implementation by Todd Lyons, client by JH.
892 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
893 config variable "prdr_enable" controls whether the server
894 advertises the facility. If the client requests PRDR a new
895 acl_data_smtp_prdr ACL is called once for each recipient, after
896 the body content is received and before the acl_smtp_data ACL.
897 The client is controlled by bolth of: a hosts_try_prdr option
898 on the smtp transport, and the server advertisement.
899 Default client logging of deliveries and rejections involving
900 PRDR are flagged with the string "PRDR".
902 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
903 fclose(). Diagnosis by Todd Lyons.
905 PP/17 Update configure.default to handle IPv6 localhost better.
906 Patch by Alain Williams (plus minor tweaks).
909 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
910 This is now consistent with GnuTLS, and is now documented: the
911 previous undocumented portable approach to treating the option as
912 unset was to force an expansion failure. That still works, and
913 an empty string is now equivalent.
915 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
916 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
917 not performing validation itself.
919 PP/20 Added force_command boolean option to pipe transport.
920 Patch from Nick Koston, of cPanel Inc.
922 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
925 TF/04 Added udpsend ACL modifer and hexquote expansion operator
927 PP/21 Fix eximon continuous updating with timestamped log-files.
928 Broken in a format-string cleanup in 4.80, missed when I repaired the
929 other false fix of the same issue.
930 Report and fix from Heiko Schlichting.
933 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
934 Report from Prashanth Katuri.
936 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
937 It's SecureTransport, so affects any MacOS clients which use the
938 system-integrated TLS libraries, including email clients.
940 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
941 using a MIME ACL for non-SMTP local injection.
942 Report and assistance in diagnosis by Warren Baker.
944 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
946 JH/16 Fix comparisons for 64b. Bugzilla 1385.
948 TL/09 Add expansion variable $authenticated_fail_id to keep track of
949 last id that failed so it may be referenced in subsequent ACL's.
951 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
954 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
955 ldap library initialization, allowing self-signed CA's to be
956 used. Also properly sets require_cert option later in code by
957 using NULL (global ldap config) instead of ldap handle (per
958 session). Bug diagnosis and testing by alxgomz.
960 TL/12 Enhanced documentation in the ratelimit.pl script provided in
961 the src/util/ subdirectory.
963 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
964 renamed to Transport Post Delivery Action by Jeremy Harris, as
967 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
968 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
969 redis_servers = needs to be configured which will be used by the redis
970 lookup. Patch from Warren Baker, of The Packet Hub.
972 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
974 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
975 hostname or reverse DNS when processing a host list. Used suggestions
976 from multiple comments on this bug.
978 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
980 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
981 Missed a few lines, added it to make the runtest require no keyboard
984 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
985 contains upper case chars. Make router use caseful_local_part.
987 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
988 support when GnuTLS has been built with p11-kit.
994 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
996 This, or similar/improved, will also be change PP/11 of 4.82.
1002 PP/01 Handle short writes when writing local log-files.
1003 In practice, only affects FreeBSD (8 onwards).
1004 Bugzilla 1053, with thanks to Dmitry Isaikin.
1006 NM/01 Bugzilla 949 - Documentation tweak
1008 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1011 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1013 PP/02 Implemented gsasl authenticator.
1015 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1017 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1018 `pkg-config foo` for cflags/libs.
1020 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1021 with rest of GSASL and with heimdal_gssapi.
1023 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1024 `pkg-config foo` for cflags/libs for the TLS implementation.
1026 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1027 properties get this fed in as external SSF. A number of robustness
1028 and debugging improvements to the cyrus_sasl authenticator.
1030 PP/08 cyrus_sasl server now expands the server_realm option.
1032 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1033 Patch by Jeremy Harris.
1035 PP/10 Added dbmjz lookup type.
1037 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1039 PP/12 MAIL args handles TAB as well as SP, for better interop with
1040 non-compliant senders.
1041 Analysis and variant patch by Todd Lyons.
1043 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1044 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1045 Patch from Dirk Mueller <dmueller@suse.com>
1047 PP/13 tls_peerdn now print-escaped for spool files.
1048 Observed some $tls_peerdn in wild which contained \n, which resulted
1049 in spool file corruption.
1051 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1052 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1053 or write after TLS renegotiation, which otherwise led to messages
1056 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1057 as a tracking header (ie: a signed header comes before the signature).
1058 Patch from Wolfgang Breyha.
1060 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1061 comma-sep list; embedded commas doubled.
1063 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1065 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1067 Report and patch from Dmitry Banschikov.
1069 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
1070 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1071 failures. We appear to now support TLS1.1+ with Exim.
1073 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1074 lets Exim select keys and certificates based upon TLS SNI from client.
1075 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1076 before an outbound SMTP session. New log_selector, +tls_sni.
1078 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1079 NULL dereference. Report and patch from Alun Jones.
1081 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1082 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1083 Not seeing resolver debug output on NetBSD, but suspect this is a
1084 resolver implementation change.
1086 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1087 Left warnings. Added "eximon gdb" invocation mode.
1089 PP/21 Defaulting "accept_8bitmime" to true, not false.
1091 PP/22 Added -bw for inetd wait mode support.
1093 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1094 locate the relevant includes and libraries. Made this the default.
1096 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1097 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1099 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1100 This may cause build issues on older platforms.
1102 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1103 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1104 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1105 Added SNI support via GnuTLS too.
1106 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1108 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1110 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1111 Applied second patch from Janne, implementing suggestion to default
1112 multiple-strings-in-record handling to match SPF spec.
1114 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1116 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1117 read-only, out of scope).
1118 Patch from Wolfgang Breyha, report from Stuart Northfield.
1120 PP/29 Fix three issues highlighted by clang analyser static analysis.
1121 Only crash-plausible issue would require the Cambridge-specific
1122 iplookup router and a misconfiguration.
1123 Report from Marcin Mirosław.
1125 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1127 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1128 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1129 As part of this, removing so much warning spew let me fix some minor
1130 real issues in debug logging.
1132 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1133 assignment on my part. Fixed.
1135 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1136 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1137 Janne Snabb (who went above and beyond: thank you).
1139 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1140 string otherwise requires a connection and a bunch more work and it's
1141 relatively easy to get wrong. Should also expose TLS library linkage
1144 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1145 64-bit ${eval} (JH/03).
1147 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1148 GNU libc to support some of the 64-bit stuff, should not lead to
1149 conflicts. Defined before os.h is pulled in, so if a given platform
1150 needs to override this, it can.
1152 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1153 protection layer was required, which is not implemented.
1154 Bugzilla 1254, patch from Wolfgang Breyha.
1156 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1157 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1158 tls_dhparam take prime identifiers. Also unbreak combination of
1159 OpenSSL+DH_params+TLSSNI.
1161 PP/39 Disable SSLv2 by default in OpenSSL support.
1167 PP/01 Solaris build fix for Oracle's LDAP libraries.
1168 Bugzilla 1109, patch from Stephen Usher.
1170 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1172 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1175 TF/02 Fix a couple more cases where we did not log the error message
1176 when unlink() failed. See also change 4.74-TF/03.
1178 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1179 lock up or crash if it happened to be inside a call to libc when it
1180 got a SIGUSR1 from exiwhat.
1182 The SIGUSR1 handler appends the current process status to the process
1183 log which is later printed by exiwhat. It used to use the general
1184 purpose logging code to do this, but several functions it calls are
1185 not safe for signals.
1187 The new output code in the SIGUSR1 handler is specific to the process
1188 log, and simple enough that it's easy to inspect for signal safety.
1189 Removing some special cases also simplifies the general logging code.
1190 Removing the spurious timestamps from the process log simplifies
1193 TF/04 Improved ratelimit ACL condition.
1195 The /noupdate option has been deprecated in favour of /readonly which
1196 has clearer semantics. The /leaky, /strict, and /readonly update modes
1197 are mutually exclusive. The update mode is no longer included in the
1198 database key; it just determines when the database is updated. (This
1199 means that when you upgrde Exim will forget old rate measurements.)
1201 Exim now checks that the per_* options are used with an update mode that
1202 makes sense for the current ACL. For example, when Exim is processing a
1203 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1204 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1205 must specify per_mail/readonly. If you omit the update mode it defaults to
1206 /leaky where that makes sense (as before) or /readonly where required.
1208 The /noupdate option is now undocumented but still supported for
1209 backwards compatibility. It is equivalent to /readonly except that in
1210 ACLs where /readonly is required you may specify /leaky/noupdate or
1211 /strict/noupdate which are treated the same as /readonly.
1213 A useful new feature is the /count= option. This is a generalization
1214 of the per_byte option, so that you can measure the throughput of other
1215 aggregate values. For example, the per_byte option is now equivalent
1216 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1218 The per_rcpt option has been generalized using the /count= mechanism
1219 (though it's more complicated than the per_byte equivalence). When it is
1220 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1221 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1222 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1223 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1224 Note that using per_rcpt with a non-readonly update mode in more than
1225 one ACL will cause the recipients to be double-counted. (The per_mail
1226 and per_byte options don't have this problem.)
1228 The handling of very low rates has changed slightly. If the computed rate
1229 is less than the event's count (usually one) then this event is the first
1230 after a long gap. In this case the rate is set to the same as this event's
1231 count, so that the first message of a spam run is counted properly.
1233 The major new feature is a mechanism for counting the rate of unique
1234 events. The new per_addr option counts the number of different
1235 recipients that someone has sent messages to in the last time period. It
1236 behaves like per_rcpt if all the recipient addresses are different, but
1237 duplicate recipient addresses do not increase the measured rate. Like
1238 the /count= option this is a general mechanism, so the per_addr option
1239 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1240 example, measure the rate that a client uses different sender addresses
1241 with the options per_mail/unique=$sender_address. There are further
1242 details in the main documentation.
1244 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1246 TF/06 Removed a few PCRE remnants.
1248 TF/07 Automatically extract Exim's version number from tags in the git
1249 repository when doing development or release builds.
1251 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1252 Bugzilla 879. Patch from Paul Fisher.
1254 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1255 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1258 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1260 PP/05 Variable $av_failed, true if the AV scanner deferred.
1261 Bugzilla 1078. Patch from John Horne.
1263 PP/06 Stop make process more reliably on build failure.
1264 Bugzilla 1087. Patch from Heiko Schlittermann.
1266 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1267 Bugzilla 1089. Patch from Heiko Schlittermann.
1269 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1270 Bugzilla 1131. Patch from Holger Weiß.
1272 PP/09 Handle IPv6 addresses with SPF.
1273 Bugzilla 860. Patch from Wolfgang Breyha.
1275 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1277 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1280 PP/11 match_* no longer expand right-hand-side by default.
1281 New compile-time build option, EXPAND_LISTMATCH_RHS.
1282 New expansion conditions, "inlist", "inlisti".
1284 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1286 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1288 PP/14 fix log_write() format string regression from TF/03.
1289 Bugzilla 1152. Patch from Dmitry Isaikin.
1295 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1297 PP/02 Harmonised TLS library version reporting; only show if debugging.
1298 Layout now matches that introduced for other libraries in 4.74 PP/03.
1300 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1302 PP/04 New "dns_use_edns0" global option.
1304 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1307 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1308 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1310 TK/01 Updated PolarSSL code to 0.14.2.
1311 Bugzilla 1097. Patch from Andreas Metzler.
1313 PP/07 Catch divide-by-zero in ${eval:...}.
1314 Fixes bugzilla 1102.
1316 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1319 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1320 format-string attack -- SECURITY: remote arbitrary code execution.
1322 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1323 time unintentionally subject to list matching rules, letting the header
1324 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1325 arbitrary string expansion). This allowed for information disclosure.
1327 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1328 INT_MIN/-1 -- value coerced to INT_MAX.
1334 NM/01 Workround for PCRE version dependency in version reporting
1337 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1338 This fixes portability to compilers other than gcc, notably
1339 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1341 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1342 makefiles for portability to HP-UX and POSIX correctness.
1344 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1345 Also via indented variable definition in the Makefile.
1346 (Debugging by Oliver Heesakkers).
1348 PP/02 Restore caching of spamd results with expanded spamd_address.
1349 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1351 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1352 Improves build reliability. Fix from: Frank Elsner
1354 NM/02 Fix wide character breakage in the rfc2047 coding
1355 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1357 NM/03 Allow underscore in dnslist lookups
1358 Fixes bug 1026. Patch from Graeme Fowler
1360 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1361 Code patches from Adam Ciarcinski of NetBSD.
1363 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1366 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1367 is logged, to avoid truncation. Patch from John Horne.
1369 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1370 Patch from Jakob Hirsch.
1372 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1373 SQL string expansion failure details.
1374 Patch from Andrey Oktyabrski.
1376 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1377 Patch from Simon Arlott.
1379 PP/09 New lookups functionality failed to compile on old gcc which rejects
1380 extern declarations in function scope.
1381 Patch from Oliver Fleischmann
1383 PP/10 Use sig_atomic_t for flags set from signal handlers.
1384 Check getgroups() return and improve debugging.
1385 Fixed developed for diagnosis in bug 927 (which turned out to be
1388 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1389 Patch from Mark Zealey.
1391 PP/12 Bugzilla 1056: Improved spamd server selection.
1392 Patch from Mark Zealey.
1394 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1395 Based on patch from Heiko Schlittermann.
1397 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1398 Patch from Uwe Doering, sign-off by Michael Haardt.
1400 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1401 variable declaration deep within a block. Bug and patch from
1404 PP/15 lookups-Makefile IRIX compatibilty coercion.
1406 PP/16 Make DISABLE_DKIM build knob functional.
1408 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1409 Patch by Simon Arlott
1411 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1412 variable argument macros. Our copy now differs from upstream.
1418 TF/01 Failure to get a lock on a hints database can have serious
1419 consequences so log it to the panic log.
1421 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1422 controlled using the smtp_confirmation log selector.
1424 TF/03 Include the error message when we fail to unlink a spool file.
1426 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1427 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1428 for maintaining out-of-tree patches for some time.
1430 PP/01 Bugzilla 139: Documentation and portability issues.
1431 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1432 Handle per-OS dynamic-module compilation flags.
1434 PP/02 Let /dev/null have normal permissions.
1435 The 4.73 fixes were a little too stringent and complained about the
1436 permissions on /dev/null. Exempt it from some checks.
1437 Reported by Andreas M. Kirchwitz.
1439 PP/03 Report version information for many libraries, including
1440 Exim version information for dynamically loaded libraries. Created
1441 version.h, now support a version extension string for distributors
1442 who patch heavily. Dynamic module ABI change.
1444 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1445 privilege escalation vulnerability whereby the Exim run-time user
1446 can cause root to append content of the attacker's choosing to
1449 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1452 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1453 If dropping privileges for untrusted macros, we disabled normal logging
1454 on the basis that it would fail; for the Exim run-time user, this is not
1455 the case, and it resulted in successful deliveries going unlogged.
1456 Fixed. Reported by Andreas Metzler.
1462 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1463 only prepend for the Resent-* case. Fixes regression introduced in
1464 Exim 4.70 by NM/22 for Bugzilla 607.
1466 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1467 increasing numbers of administrators be bitten by this.
1469 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1471 PP/03 Bugzilla 994: added openssl_options main configuration option.
1473 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1475 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1477 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1479 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1480 without a peer certificate, leading to a segfault because of an
1481 assumption that peers always have certificates. Be a little more
1482 paranoid. Problem reported by Martin Tscholak.
1484 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1485 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1486 NB: ClamAV planning to remove STREAM in "middle of 2010".
1487 CL also introduces -bmalware, various -d+acl logging additions and
1488 more caution in buffer sizes.
1490 PP/09 Implemented reverse_ip expansion operator.
1492 PP/10 Bugzilla 937: provide a "debug" ACL control.
1494 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1496 PP/12 Bugzilla 973: Implement --version.
1498 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1500 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1502 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1504 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1505 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1506 ignore trailing whitespace.
1508 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1510 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1513 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1514 Notification from Dr Andrew Aitchison.
1516 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1517 ExtendedDetectionInfo response format.
1518 Notification from John Horne.
1520 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1523 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1524 XSL and documented dependency on system catalogs, with examples of how
1527 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1530 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1531 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1532 configuration file which is writeable by the Exim user or group.
1534 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1535 of configuration files to cover files specified with the -C option if
1536 they are going to be used with root privileges, not just the default
1539 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1540 option (effectively making it always true).
1542 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1543 files to be used while preserving root privileges.
1545 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1546 that rogue child processes cannot use them.
1548 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1549 run-time user, instead of root.
1551 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1552 Exim run-time user without dropping privileges.
1554 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1555 result string, instead of calling string_vformat() twice with the same
1558 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1559 for other users. Others should always drop root privileges if they use
1560 -C on the command line, even for a whitelisted configure file.
1562 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1564 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1570 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1571 $data_path, and $header_path variables; fixed documentation bugs and
1574 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1575 exipick to access non-standard spools, including the "frozen" queue
1578 NM/01 Bugzilla 965: Support mysql stored procedures.
1579 Patch from Alain Williams
1581 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1583 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1584 Patch from Andreas Metzler
1586 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1587 Patch from Kirill Miazine
1589 NM/05 Bugzilla 671: Added umask to procmail example.
1591 JJ/03 installed exipick 20100323.0, fixing doc bug
1593 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1594 directory. Notification and patch from Dan Rosenberg.
1596 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1598 TK/02 Improve log output when DKIM signing operation fails.
1600 MH/01 Treat the transport option dkim_domain as a colon separated
1601 list, not as a single string, and sign the message with each element,
1602 omitting multiple occurences of the same signer.
1604 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1605 Bugzilla 985, 986. Patch by Simon Arlott
1607 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1608 Patch by Simon Arlott
1610 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1611 MBX locking. Notification from Dan Rosenberg.
1617 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1619 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1621 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1623 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1625 NM/04 Bugzilla 915: Flag broken perl installation during build.
1631 TK/01 Added patch by Johannes Berg that expands the main option
1632 "spamd_address" if it starts with a dollar sign.
1634 TK/02 Write list of recipients to X-Envelope-Sender header when building
1635 the mbox-format spool file for content scanning (suggested by Jakob
1638 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1639 (http://www.dcc-servers.net/) support via dccifd. Activated by
1640 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1642 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1643 by Mark Daniel Reidel <mr@df.eu>.
1645 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1646 When building exim an external PCRE library is now needed -
1647 PCRE is a system library on the majority of modern systems.
1648 See entry on PCRE_LIBS in EDITME file.
1650 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1651 conversation. Added nologin parameter to request.
1652 Patch contributed by Kirill Miazine.
1654 TF/01 Do not log submission mode rewrites if they do not change the address.
1656 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1658 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1659 log files in place. Contributed by Roberto Lima.
1661 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1663 TF/03 Bugzilla 615: When checking the local_parts router precondition
1664 after a local_part_suffix or local_part_prefix option, Exim now
1665 does not use the address's named list lookup cache, since this
1666 contains cached lookups for the whole local part.
1668 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1669 Robert Millan. Documentation is in experimental-spec.txt.
1671 TF/04 Bugzilla 668: Fix parallel build (make -j).
1673 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1675 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1676 Patch provided by Jan Srzednicki.
1678 TF/05 Leading white space used to be stripped from $spam_report which
1679 wrecked the formatting. Now it is preserved.
1681 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1682 that they are available at delivery time.
1684 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1686 TF/08 TLS error reporting now respects the incoming_interface and
1687 incoming_port log selectors.
1689 TF/09 Produce a more useful error message if an SMTP transport's hosts
1690 setting expands to an empty string.
1692 NM/06 Bugzilla 744: EXPN did not work under TLS.
1693 Patch provided by Phil Pennock.
1695 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1696 Patch provided by Richard Godbee.
1698 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1699 acl_smtp_notquit, added index entry.
1701 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1702 Patch provided by Eugene Bujak.
1704 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1705 accept(). Patch provided by Maxim Dounin.
1707 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1708 Patch provided by Phil Pennock.
1710 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1712 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1713 Patch provided by Brad "anomie" Jorsch.
1715 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1716 Patch provided by Dean Brooks.
1718 TK/05 Add native DKIM support (does not depend on external libraries).
1720 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1721 Patch provided by Graeme Fowler.
1723 NM/16 Bugzilla 851: Documentation example syntax fix.
1725 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1727 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1730 NM/19 Bugzilla 745: TLS version reporting.
1731 Patch provided by Phil Pennock.
1733 NM/20 Bugzilla 167: bool: condition support.
1734 Patch provided by Phil Pennock.
1736 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1737 clients. Patch provided by Phil Pennock.
1739 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1740 Patch provided by Brad "anomie" Jorsch.
1742 NM/23 Bugzilla 687: Fix misparses in eximstats.
1743 Patch provided by Heiko Schlittermann.
1745 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1746 Patch provided by Heiko Schlittermann.
1748 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1749 plus update to original patch.
1751 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1753 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1754 Patch provided by David Brownlee.
1756 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1758 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1760 NM/30 Bugzilla 888: TLS documentation bugfixes.
1762 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1764 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1765 Unlike the original bugzilla I have changed all shell scripts in src tree.
1767 NM/33 Bugzilla 898: Transport filter timeout fix.
1768 Patch by Todd Rinaldo.
1770 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1771 Patch by Serge Demonchaux.
1773 NM/35 Bugzilla 39: Base64 decode bug fixes.
1774 Patch by Jakob Hirsch.
1776 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1778 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1780 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1782 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1788 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1789 ALT-N's libdkim that I have put here:
1790 http://duncanthrax.net/exim-experimental/
1792 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1793 were called 'true' and it seems that C99 defines that as a reserved
1794 keyword to be used with 'bool' variable types. That means you could
1795 not include C99-style headers which use bools without triggering
1796 build errors in sieve.c.
1798 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1799 as mailq or other aliases. Changed the --help handling significantly
1800 to do whats expected. exim_usage() emits usage/help information.
1802 SC/01 Added the -bylocaldomain option to eximstats.
1804 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1806 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1808 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1814 PH/01 Another patch from the Sieve maintainer.
1816 PH/02 When an IPv6 address is converted to a string for single-key lookup
1817 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1818 dots are used instead of colons so that keys in lsearch files need not
1819 contain colons. This was done some time before quoting was made available
1820 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1821 (notated using the quote facility) so as to distinguish them from IPv4
1822 keys. This meant that lookups for IP addresses in host lists did not work
1823 for iplsearch lookups.
1825 This has been fixed by arranging for IPv6 addresses to be expressed with
1826 colons if the lookup type is iplsearch. This is not incompatible, because
1827 previously such lookups could never work.
1829 The situation is now rather anomolous, since one *can* have colons in
1830 ordinary lsearch keys. However, making the change in all cases is
1831 incompatible and would probably break a number of configurations.
1833 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1836 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1837 conversion specification without a maximum field width, thereby enabling
1838 a rogue spamd server to cause a buffer overflow. While nobody in their
1839 right mind would setup Exim to query an untrusted spamd server, an
1840 attacker that gains access to a server running spamd could potentially
1841 exploit this vulnerability to run arbitrary code as the Exim user.
1843 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1844 $primary_hostname instead of what libspf2 thinks the hosts name is.
1846 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1847 a directory entry by the name of the lookup key. Previously, if a
1848 symlink pointed to a non-existing file or a file in a directory that
1849 Exim lacked permissions to read, a lookup for a key matching that
1850 symlink would fail. Now it is enough that a matching directory entry
1851 exists, symlink or not. (Bugzilla 503.)
1853 PH/03 The body_linecount and body_zerocount variables are now exported in the
1856 PH/04 Added the $dnslist_matched variable.
1858 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1859 This means they are set thereafter only if the connection becomes
1862 PH/06 Added the client_condition to authenticators so that some can be skipped
1863 by clients under certain conditions.
1865 PH/07 The error message for a badly-placed control=no_multiline_responses left
1866 "_responses" off the end of the name.
1868 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1870 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1871 (without spaces) instead of just copying the configuration text.
1873 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1875 PH/11 Added $max_received_linelength.
1877 PH/12 Added +ignore_defer and +include_defer to host lists.
1879 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1880 way in which PCRE > 7.0 is built.
1882 PH/14 Implemented queue_only_load_latch.
1884 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1885 MAIL command. The effect was to mangle the value on 64-bit systems.
1887 PH/16 Another patch from the Sieve maintainer.
1889 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1891 PH/18 If a system quota error occurred while trying to create the file for
1892 a maildir delivery, the message "Mailbox is full" was not appended to the
1893 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1894 only to a quota excession during the actual writing of the file.
1896 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1897 characters?) which causes problems in log lines. The DN values are now
1898 passed through string_printing() before being added to log lines.
1900 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1901 and InterBase are left for another time.)
1903 PH/21 Added message_body_newlines option.
1905 PH/22 Guard against possible overflow in moan_check_errorcopy().
1907 PH/23 POSIX allows open() to be a macro; guard against that.
1909 PH/24 If the recipient of an error message contained an @ in the local part
1910 (suitably quoted, of course), incorrect values were put in $domain and
1911 $local_part during the evaluation of errors_copy.
1917 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1918 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1921 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1922 issue a MAIL command.
1924 PH/02 In an ACL statement such as
1926 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1928 if a client was not listed at all, or was listed with a value other than
1929 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1930 the condition was not true (as it should be), so access was not denied.
1931 The bug was that the ! inversion was incorrectly passed on to the second
1932 item. This has been fixed.
1934 PH/03 Added additional dnslists conditions == and =& which are different from
1935 = and & when the dns lookup returns more than one IP address.
1937 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1938 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1940 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1941 FSYNC, which compiles an option called disable_fsync that allows for
1942 bypassing fsync(). The documentation is heavily laced with warnings.
1944 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1946 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1947 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1948 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1949 including adding "make clean"; (3) Added -fPIC when compiling the test
1950 dynamically loaded module, to get rid of a warning.
1952 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1953 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1954 = 0s. The bug is otherwise harmless.
1956 PH/07 There was a bug in the dovecot authenticator such that the value of
1957 $auth1 could be overwritten, and so not correctly preserved, after a
1958 successful authentication. This usually meant that the value preserved by
1959 the server_setid option was incorrect.
1961 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1963 PH/09 Installed PCRE release 7.0.
1965 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1966 run for batched SMTP input. It is now run at the start of every message
1967 in the batch. While fixing this I discovered that the process information
1968 (output by running exiwhat) was not always getting set for -bs and -bS
1969 input. This is fixed, and it now also says "batched" for BSMTP.
1971 PH/11 Added control=no_pipelining.
1973 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1974 patch, slightly modified), and move the expansion of helo_data till after
1975 the connection is made in the smtp transport (so it can use these
1978 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1980 PH/14 Added log_selector = +pid.
1982 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1984 PH/16 Add ${if forany and ${if forall.
1986 PH/17 Added dsn_from option to vary the From: line in DSNs.
1988 PH/18 Flush SMTP output before performing a callout, unless control =
1989 no_callout_flush is set.
1991 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1992 was true (the default) a successful delivery failed to delete the retry
1993 item, thus causing premature timeout of the address. The bug is now
1996 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1998 PH/21 Long custom messages for fakedefer and fakereject are now split up
1999 into multiline reponses in the same way that messages for "deny" and
2000 other ACL rejections are.
2002 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2003 with slight modification.
2005 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2006 draft, changing the syntax and factoring some duplicate code".
2008 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2009 for deliveries of the second and subsequent messages over the same SMTP
2012 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2013 ${reduce, with only minor "tidies".
2015 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2017 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2018 expansion side effects.
2020 PH/27 When a message times out after an over-quota error from an Exim-imposed
2021 quota, the bounce message says "mailbox is full". This message was not
2022 being given when it was a system quota that was exceeded. It now should
2025 MH/03 Made $recipients available in local_scan(). local_scan() already has
2026 better access to the recipient list through recipients_list[], but
2027 $recipients can be useful in postmaster-provided expansion strings.
2029 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2030 in the case of a MAIL command with additional options following the
2031 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2032 were accidentally chopped off.
2034 PH/29 SMTP synchronization checks are implemented when a command is read -
2035 there is a check that no more input is waiting when there shouldn't be
2036 any. However, for some commands, a delay in an ACL can mean that it is
2037 some time before the response is written. In this time, more input might
2038 arrive, invalidly. So now there are extra checks after an ACL has run for
2039 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2040 pipelining has not been advertised.
2042 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2044 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2045 returned in the SMTP response when smtp_return_error_details was false.
2046 This has been fixed.
2048 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2049 instead of the C I/O that was originally supplied, because problems were
2050 reported on Solaris.
2052 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2053 Exim which did not show up earlier: it was assuming that a call to
2054 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2055 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2056 was a macro that became an assignment, so it seemed to work. This has
2057 changed to a proper function call with a void return, hence the compile
2058 error. Exim's code has been fixed.
2060 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2063 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2065 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2067 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2068 because it turns out to be too big or there is a timeout) there is no
2069 "Completed" line in the log. When some messages of this type were
2070 selected by exigrep, they were listed as "not completed". Others were
2071 picked up by some special patterns. I have improved the selection
2072 criteria to be more general.
2074 PH/38 The host_find_failed option in the manualroute router can now be set
2075 to "ignore", to completely ignore a host whose IP address cannot be
2076 found. If all hosts are ignored, the behaviour is controlled by the new
2077 host_all_ignored option.
2079 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2080 homing or because of multiple MX records with /mx) generated more than
2081 one IP address, and the following item turned out to be the local host,
2082 all the secondary addresses of the first item were incorrectly removed
2083 from the list, along with the local host and any following hosts (which
2084 is what is supposed to happen).
2086 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2087 whoever called Exim into the -H file. In the case of the daemon it was
2088 behaving confusingly. When first started, it used values for whoever
2089 started the daemon, but after a SIGHUP it used the Exim user (because it
2090 calls itself on a restart). I have changed the code so that it now always
2093 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2094 message are rejected with the same error (e.g. no authentication or bad
2095 sender address), and a DATA command is nevertheless sent (as can happen
2096 with PIPELINING or a stupid MUA), the error message that was given to the
2097 RCPT commands is included in the rejection of the DATA command. This is
2098 intended to be helpful for MUAs that show only the final error to their
2101 PH/42 Another patch from the Sieve maintainer.
2103 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2104 Eximstats - Fixed some broken HTML links and added missing column headers
2106 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2107 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2109 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2111 PH/43 Yet another patch from the Sieve maintainer.
2113 PH/44 I found a way to check for a TCP/IP connection going away before sending
2114 the response to the final '.' that terminates a message, but only in the
2115 case where the client has not sent further data following the '.'
2116 (unfortunately, this is allowed). However, in many cases there won't be
2117 any further data because there won't be any more messages to send. A call
2118 to select() can be used: if it shows that the input is "ready", there is
2119 either input waiting, or the socket has been closed. An attempt to read
2120 the next input character can distinguish the two cases. Previously, Exim
2121 would have sent an OK response which the client would never have see.
2122 This could lead to message repetition. This fix should cure that, at
2123 least in a lot of common cases.
2125 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2126 advertised in response to EHLO.
2132 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2133 fixed by 4.65/MH/01 (is this a record?) are fixed:
2135 (i) An empty string was always treated as zero by the numeric comparison
2136 operators. This behaviour has been restored.
2138 (ii) It is documented that the numeric comparison operators always treat
2139 their arguments as decimal numbers. This was broken in that numbers
2140 starting with 0 were being interpreted as octal.
2142 While fixing these problems I realized that there was another issue that
2143 hadn't been noticed. Values of message_size_limit (both the global option
2144 and the transport option) were treated as octal if they started with 0.
2145 The documentation was vague. These values are now always treated as
2146 decimal, and I will make that clear in the documentation.
2152 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2153 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2156 MH/01 Don't check that the operands of numeric comparison operators are
2157 integers when their expansion is in "skipping" mode (fixes bug
2158 introduced by 4.64-PH/07).
2160 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2161 child addresses, Exim now panics and dies. Previously, because the count
2162 is held in a short int, deliveries were likely to be lost. As such a
2163 large number of recipients for a single message is ridiculous
2164 (performance will be very, very poor), I have chosen to impose a limit
2165 rather than extend the field.
2171 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2172 leftover -K file (the existence of which was triggered by #402).
2173 While we were at it, introduced process PID as part of the -K
2174 filename. This should rule out race conditions when creating
2177 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2178 processing considerably. Previous code took too long for large mails,
2179 triggering a timeout which in turn triggers #401.
2181 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2182 in the DK code in transports.c. sendfile() is not really portable,
2183 hence the _LINUX specificness.
2185 TF/01 In the add_headers option to the mail command in an Exim filter,
2186 there was a bug that Exim would claim a syntax error in any
2187 header after the first one which had an odd number of characters
2190 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2191 callout verification, Exim cached a "reject" for the entire domain. This
2192 is correct for most verifications, but it is not correct for a recipient
2193 verification with use_sender or use_postmaster set, because in that case
2194 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2195 case of MAIL FROM:<> rejection from other early rejections (e.g.
2196 rejection of HELO). When verifying a recipient using a non-null MAIL
2197 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2198 Whatever the result of the callout, the value of the domain cache is
2199 left unchanged (for any other kind of callout, getting as far as trying
2200 RCPT means that the domain itself is ok).
2202 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2205 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2206 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2207 session, the daemon ignores ECONNECT errors and logs others; it now
2208 ignores EPIPE as well.
2210 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2211 (quoted-printable decoding).
2213 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2214 later the small subsequent patch to fix an introduced bug.
2216 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2218 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2220 PH/08 An error is now given if message_size_limit is specified negative.
2222 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2223 to be given (somewhat) arbitrary names.
2225 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2228 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2229 miscellaneous code fixes
2231 PH/10 Added the log_reject_target ACL modifier to specify where to log
2234 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2235 hostname. This is wrong, because it relates to the incoming message (and
2236 probably the interface on which it is arriving) and not to the outgoing
2237 callout (which could be using a different interface). This has been
2238 changed to use the value of the helo_data option from the smtp transport
2239 instead - this is what is used when a message is actually being sent. If
2240 there is no remote transport (possible with a router that sets up host
2241 addresses), $smtp_active_hostname is used.
2243 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2244 tweaks were necessary in order to get it to work (see also 21 below):
2245 (a) The code assumed that strncpy() returns a negative number on buffer
2246 overflow, which isn't the case. Replaced with Exim's string_format()
2248 (b) There were several signed/unsigned issues. I just did the minimum
2249 hacking in of casts. There is scope for a larger refactoring.
2250 (c) The code used strcasecmp() which is not a standard C function.
2251 Replaced with Exim's strcmpic() function.
2252 (d) The code set only $1; it now sets $auth1 as well.
2253 (e) A simple test gave the error "authentication client didn't specify
2254 service in request". It would seem that Dovecot has changed its
2255 interface. Fortunately there's a specification; I followed it and
2256 changed what the client sends and it appears to be working now.
2258 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2261 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2262 address A is aliased to B and C, where B exists and C does not. Without
2263 -v the output is "A verified" because verification stops after a
2264 successful redirection if more than one address is generated. However,
2265 with -v the child addresses are also verified. Exim was outputting "A
2266 failed to verify" and then showing the successful verification for C,
2267 with its parentage. It now outputs "B failed to verify", showing B's
2268 parentage before showing the successful verification of C.
2270 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2271 look up a TXT record in a specific list after matching in a combined
2274 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2275 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2276 they consult the DNS. I had assumed they would set it the way they
2277 wanted; and indeed my experiments on Linux seem to show that in some
2278 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2279 To be on the safe side, however, I have now made the interface to
2280 host_find_byname() similar to host_find_bydns(), with an argument
2281 containing the DNS resolver options. The host_find_byname() function now
2282 sets these options at its start, just as host_find_bydns() does. The smtp
2283 transport options dns_qualify_single and dns_search_parents are passed to
2284 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2285 of host_find_byname() use the default settings of RES_DEFNAMES
2286 (qualify_single) but not RES_DNSRCH (search_parents).
2288 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2289 spool_read_header() do less string testing, by means of a preliminary
2290 switch on the second character of optional "-foo" lines. (This is
2291 overdue, caused by the large number of possibilities that now exist.
2292 Originally there were few.) While I was there, I also converted the
2293 str(n)cmp tests so they don't re-test the leading "-" and the first
2294 character, in the hope this might squeeze out yet more improvement.
2296 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2297 flag allowing group syntax was set by the header_syntax check but not
2298 turned off, possible causing trouble later; (2) The flag was not being
2299 set at all for the header_verify test, causing "group"-style headers to
2300 be rejected. I have now set it in this case, and also caused header_
2301 verify to ignore an empty address taken from a group. While doing this, I
2302 came across some other cases where the code for allowing group syntax
2303 while scanning a header line wasn't quite right (mostly, not resetting
2304 the flag correctly in the right place). These bugs could have caused
2305 trouble for malformed header lines. I hope it is now all correct.
2307 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2308 with the "reply" argument non-NULL. The code, however (which originally
2309 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2310 but it didn't always do it. This confused somebody who was copying the
2311 code for some other use. I have removed all the tests.
2313 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2314 feature that was used to support insecure browsers during the U.S. crypto
2315 embargo. It requires special client support, and Exim is probably the
2316 only MTA that supported it -- and would never use it because real RSA is
2317 always available. This code has been removed, because it had the bad
2318 effect of slowing Exim down by computing (never used) parameters for the
2319 RSA_EXPORT functionality.
2321 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2322 authenticator to fail if there's a tab character in the incoming data
2323 (there should never be unless someone is messing about, as it's supposed
2324 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2325 if the connection is using TLS or if the remote IP is the same as the
2326 local IP, and the "valid-client-cert option" if a client certificate has
2329 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2330 authenticators. This can be used for authorization after authentication
2331 succeeds. (In the case of plaintext, it servers for both authentication
2334 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2335 if any retry times were supplied.
2337 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2338 connection, where there is no client IP address to check. In this
2339 situation, the verify now always succeeds.
2341 PH/25 Applied John Jetmore's -Mset patch.
2343 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2345 PH/27 In a string expansion for a processed (not raw) header when multiple
2346 headers of the same name were present, leading whitespace was being
2347 removed from all of them, but trailing whitespace was being removed only
2348 from the last one. Now trailing whitespace is removed from each header
2349 before concatenation. Completely empty headers in a concatenation (as
2350 before) are ignored.
2352 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2353 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2355 PH/29 [Removed. This was a change that I later backed out, and forgot to
2356 correct the ChangeLog entry (that I had efficiently created) before
2357 committing the later change.]
2359 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2360 address errors (4xx response to RCPT) over the same connection as other
2361 messages routed to the same hosts. Such deliveries are always "forced",
2362 so retry times are not inspected. This resulted in far too many retries
2363 for the affected addresses. The effect occurred only when there were more
2364 hosts than the hosts_max_try setting in the smtp transport when it had
2365 the 4xx errors. Those hosts that it had tried were not added to the list
2366 of hosts for which the message was waiting, so if all were tried, there
2367 was no problem. Two fixes have been applied:
2369 (i) If there are any address or message errors in an SMTP delivery, none
2370 of the hosts (tried or untried) are now added to the list of hosts
2371 for which the message is waiting, so the message should not be a
2372 candidate for sending over the same connection that was used for a
2373 successful delivery of some other message. This seems entirely
2374 reasonable: after all the message is NOT "waiting for some host".
2375 This is so "obvious" that I'm not sure why it wasn't done
2376 previously. Hope I haven't missed anything, but it can't do any
2377 harm, as the worst effect is to miss an optimization.
2379 (ii) If, despite (i), such a delivery is accidentally attempted, the
2380 routing retry time is respected, so at least it doesn't keep
2381 hammering the server.
2383 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2384 in ${readsocket because some servers need this prod.
2386 PH/32 Added some extra debug output when updating a wait-xxx database.
2388 PH/33 The hint "could be header name not terminated by colon", which has been
2389 given for certain expansion errors for a long time, was not being given
2390 for the ${if def:h_colon_omitted{... case.
2392 PH/34 The spec says: "With one important exception, whenever a domain list is
2393 being scanned, $domain contains the subject domain." There was at least
2394 one case where this was not true.
2396 PH/35 The error "getsockname() failed: connection reset by peer" was being
2397 written to the panic log as well as the main log, but it isn't really
2398 panic-worthy as it just means the connection died rather early on. I have
2399 removed the panic log writing for the ECONNRESET error when getsockname()
2402 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2403 runs only) independently of the message's sender address. This meant
2404 that, if the 4xx error was in fact related to the sender, a different
2405 message to the same recipient with a different sender could confuse
2406 things. In particualar, this can happen when sending to a greylisting
2407 server, but other circumstances could also provoke similar problems.
2408 I have changed the default so that the retry time for these errors is now
2409 based a combination of the sender and recipient addresses. This change
2410 can be overridden by setting address_retry_include_sender=false in the
2413 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2414 remote server are returned as part of bounce messages. This was not
2415 happening for LMTP over a pipe (the lmtp transport), but now it is the
2416 same for both kinds of LMTP.
2418 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2419 in header lines that were in fact CNAMEs. This is no longer the case.
2421 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2422 and queue runs started by the daemon processed all messages. This has
2423 been fixed so that -R and -S can now usefully be given with -q<time>.
2425 PH/40 Import PCRE release 6.7 (fixes some bugs).
2427 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2429 PH/42 Give an error if -q is specified more than once.
2431 PH/43 Renamed the variables $interface_address and $interface_port as
2432 $received_ip_address and $received_port, to make it clear that these
2433 values apply to message reception, and not to the outgoing interface when
2434 a message is delivered. (The old names remain recognized, of course.)
2436 PH/44 There was no timeout on the connect() call when using a Unix domain
2437 socket in the ${readsocket expansion. There now is.
2439 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2440 be meaningful with "accept".
2442 SC/01 Eximstats V1.43
2443 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2445 SC/02 Eximstats V1.44
2446 Use a glob alias rather than an array ref in the generated
2447 parser. This improves both readability and performance.
2449 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2450 Collect SpamAssassin and rejection statistics.
2451 Don't display local sender or destination tables unless
2452 there is data to show.
2453 Added average volumes into the top table text output.
2455 SC/04 Eximstats V1.46
2456 Collect data on the number of addresses (recipients)
2457 as well as the number of messages.
2459 SC/05 Eximstats V1.47
2460 Added 'Message too big' to the list of mail rejection
2461 reasons (thanks to Marco Gaiarin).
2463 SC/06 Eximstats V1.48
2464 Mainlog lines which have GMT offsets and are too short to
2465 have a flag are now skipped.
2467 SC/07 Eximstats V1.49 (Alain Williams)
2468 Added the -emptyok flag.
2470 SC/08 Eximstats V1.50
2471 Fixes for obtaining the IP address from reject messages.
2473 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2474 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2475 whitesspace changes from 4.64-PH/27
2477 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2480 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2481 are found, allow negative numbers in numeric criteria)
2483 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2485 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2486 to match changes made in 4.64-PH/43
2488 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2490 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2491 "domain" is actually an IP address, and force a failure. This locks out
2492 those revolvers/nameservers that support "A-for-A" lookups, in
2493 contravention of the specifications.
2495 PH/48 When a host name was looked up from an IP address, and the subsequent
2496 forward lookup of the name timed out, the host name was left in
2497 $sender_host_name, contrary to the specification.
2499 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2500 restricted to single-key lookups, Exim was not diagnosing an error if
2501 * or *@ was used with a query-style lookup.
2503 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2505 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2506 long ago, but noone interested enough thought of it. Let's just say that
2507 the "1.1" means that there are some new functions that weren't there at
2508 some point in the past.
2510 PH/51 Error processing for expansion failure of helo_data from an smtp
2511 transport during callout processing was broken.
2513 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2514 tested/used via the -bh/-bhc/-bs options.
2516 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2517 bug, fixed in subsequent PCRE releases).
2519 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2520 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2522 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2528 SC/01 Use a glob alias rather than an array ref in eximstats generated
2529 parser. This improves both readability and performance.
2531 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2532 Don't display local sender or destination tables in eximstats unless
2533 there is data to show.
2534 Added average volumes into the eximstats top table text output.
2536 SC/03 Collect data on the number of addresses (recipients) as well
2537 as the number of messages in eximstats.
2539 TF/01 Correct an error in the documentation for the redirect router. Exim
2540 does (usually) call initgroups() when daemonizing.
2542 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2543 with consistent privilege compared to when running as a daemon.
2545 TF/03 Note in the spec that $authenticated_id is not set for local
2546 submissions from trusted users.
2548 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2549 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2551 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2552 by adding some example configuration directives to the default
2553 configuration file. A little bit of work is required to uncomment the
2554 directives and define how usernames and passwords are checked, but
2555 there is now a framework to start from.
2557 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2558 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2559 without this. I don't know how relevant this is to other LDAP libraries.
2561 PH/02 Add the verb name to the "unknown ACL verb" error.
2563 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2565 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2567 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2568 directory not expanded when it should be if an expanded home directory
2569 was set for the address (which is overridden by the transport).
2571 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2574 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2575 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2576 because it is too late at that time, and has no effect.
2578 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2579 security issue with \' (bugzilla #107). I could not use the
2580 PQescapeStringConn() function, because it needs a PGconn value as one of
2583 PH/08 When testing addresses using -bt, indicate those final addresses that
2584 are duplicates that would not cause an additional delivery. At least one
2585 person was confused, thinking that -bt output corresponded to deliveries.
2586 (Suppressing duplicates isn't a good idea as you lose the information
2587 about possibly different redirections that led to the duplicates.)
2589 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2590 systems where poll() doesn't work, in particular OS X.
2592 PH/10 Added more information to debugging output for retry time not reached.
2594 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2595 operations in malware.c.
2597 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2600 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2601 syslog_duplication set false, log lines that would normally be written
2602 both the the main log and to the reject log were not written to syslog at
2605 PH/14 In the default configuration, change the use of "message" in ACL warn
2606 statements to "add_header".
2608 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2609 not followed by a command (e.g. "seen endif").
2611 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2612 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2615 PH/17 Added extra conditions to the default value of delay_warning_condition
2619 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2620 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2621 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2624 The Auto-Submitted: and various List- headers are standardised, whereas I
2625 don't think Precedence: ever was.
2627 PH/18 Refactored debugging code in route_finduser() to show more information,
2628 in particular, the error code if getpwnam() issues one.
2630 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2631 This is apparently needed in addition to the PH/07 change above to avoid
2632 any possible encoding problems.
2634 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2635 but not after initializing Perl.
2637 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2638 output them only if debugging. By default they are written stderr,
2639 apparently, which is not desirable.
2641 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2644 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2647 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2649 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2650 authenticated or an ident call has been made. Suppress the default
2651 values for $authenticated_id and $authenticated_sender (but permit -oMai
2652 and -oMas) when testing with -bh.
2654 PH/24 Re-jigged the order of the tests in the default configuration so that the
2655 tests for valid domains and recipients precede the DNS black list and CSA
2656 tests, on the grounds that those ones are more expensive.
2658 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2659 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2660 This bug exists in every version of Exim that I still have, right back to
2663 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2664 However, an attempt to turn on case-sensitivity in a regex key by
2665 including (?-i) didn't work because the subject string was already
2666 lowercased, and the effects were non-intuitive. It turns out that a
2667 one-line patch can be used to allow (?-i) to work as expected.
2673 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2674 other effects) broke the use of negated acl sub-conditions.
2676 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2679 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2680 "Deny" causes Exim to reject the incoming connection with a 554 error.
2681 Unfortunately, if there is a major crisis, such as a disk failure,
2682 tcp-wrappers gives "deny", whereas what one would like would be some
2683 kind of temporary error. A kludge has been added to help with this.
2684 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2685 554 error is used if errno is still zero or contains ENOENT (which occurs
2686 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2689 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2691 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2692 errors. Otherwise a message that provokes a temporary error (when other
2693 messages do not) can cause a whole host to time out.
2695 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2696 addresses were routed directly to files or pipes from a redirect router.
2697 File deliveries just didn't batch; pipe deliveries might have suffered
2700 PH/06 A failure to get a lock for a hints database would erroneously always say
2701 "Failed to get write lock", even when it was really a read lock.
2703 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2704 of 0600. This has been changed to use the value of the lockfile_mode
2705 option (which defaults to 0600).
2707 PH/08 Applied small patch from the Sieve maintainer.
2709 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2710 folder from quota calculations, a direct delivery into this folder messed
2711 up the contents of the maildirsize file. This was because the regex was
2712 used only to exclude .Trash (or whatever) when the size of the mailbox
2713 was calculated. There was no check that a delivery was happening into an
2714 excluded directory. This bug has been fixed by ignoring all quota
2715 processing for deliveries into excluded directories.
2717 PH/10 Added the maildirfolder_create_regex option to appendfile.
2723 PH/01 The code for finding all the local interface addresses on a FreeBSD
2724 system running IPv6 was broken. This may well have applied to all BSD
2725 systems, as well as to others that have similar system calls. The broken
2726 code found IPv4 interfaces correctly, but gave incorrect values for the
2727 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2728 that it would not match correctly against @[] and not recognize the IPv6
2731 PH/02 The ipliteral router was not recognizing addresses of the form user@
2732 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2734 PH/03 Added disable_ipv6.
2736 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2737 decoded form, because it is most often used to construct To: headers
2738 lines in autoreplies, and the decoded form may well be syntactically
2739 invalid. However, $reply_address has leading white space removed, and all
2740 newlines turned into spaces so that the autoreply transport does not
2743 PH/05 If group was specified without a user on a router, and no group or user
2744 was specified on a transport, the group from the router was ignored.
2746 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2747 for visible compile-time settings that can be used to change these
2748 numbers, for those that want even more. Backwards compatibility with old
2749 spool files has been maintained. However, going back to a previous Exim
2750 release will lost any variables that are in spool files.
2752 PH/07 Two small changes when running in the test harness: increase delay when
2753 passing a TCP/IP connection to a new process, in case the original
2754 process has to generate a bounce, and remove special handling of
2755 127.0.0.2 (sic), which is no longer necessary.
2757 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2758 be the same on different OS.
2760 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2763 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2764 whether --show-vars was specified or not
2766 JJ/02 exipick: Added support for new ACL variable spool format introduced
2769 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2770 syntactically invalid From: or Reply-to: line, and a filter used this to
2771 generate an autoreply, and therefore failed to obtain an address for the
2772 autoreply, Exim could try to deliver to a non-existent relative file
2773 name, causing unrelated and misleading errors. What now happens is that
2774 it logs this as a hard delivery error, but does not attempt to create a
2777 PH/11 The exinext utility has a -C option for testing purposes, but although
2778 the given file was scanned by exinext itself; it wasn't being passed on
2779 when Exim was called.
2781 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2782 an end-of-file indication when reading a command response.
2784 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2785 compiled. In many other places in Exim, IPv6 addresses are always
2786 recognized, so I have changed this. It also means that IPv4 domain
2787 literals of the form [IPV4:n.n.n.n] are now always recognized.
2789 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2790 used if the router is not running as root, for example, when verifying at
2791 ACL time, or when using -bh. The debugging output from this situation was
2792 non-existent - all you got was a failure to exec. I have made two
2795 (a) Failures to set uid/gid, the current directory, or a process leader
2796 in a subprocess such as that created by queryprogram now generate
2797 suitable debugging ouput when -d is set.
2799 (b) The queryprogram router detects when it is not running as root,
2800 outputs suitable debugging information if -d is set, and then runs
2801 the subprocess without attempting to change uid/gid.
2803 PH/15 Minor change to Makefile for building test_host (undocumented testing
2806 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2807 additional section of a DNS packet that returns MX or SRV records.
2808 Instead, it always explicitly searches for A/AAAA records. This avoids
2809 major problems that occur when a DNS server includes only records of one
2810 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2811 fixed another bug: if SRV records were looked up and the corresponding
2812 address records were *not* found in the additional section, the port
2813 values from the SRV records were lost.
2815 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2816 using the correct key (the original address) when searching the retry
2817 rules in order to find which one to use for generating the retry hint.
2819 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2820 adding the default one. Similarly, if it contains a Reply-To: header, the
2821 errors_reply_to option, if set, is not used.
2823 PH/19 When calculating a retry time, Exim used to measure the "time since
2824 failure" by looking at the "first failed" field in the retry record. Now
2825 it does not use this if it is later than than the arrival time of the
2826 message. Instead it uses the arrival time. This makes for better
2827 behaviour in cases where some deliveries succeed, thus re-setting the
2828 "first failed" field. An example is a quota failure for a huge message
2829 when small messages continue to be delivered. Without this change, the
2830 "time since failure" will always be short, possible causing more frequent
2831 delivery attempts for the huge message than are intended.
2832 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2834 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2835 $1, $2, $3) because the numerical variables can be reset during some
2836 expansion items (e.g. "match"), thereby losing the authentication data.
2838 PH/21 Make -bV show the size of off_t variables so that the test suite can
2839 decide whether to run tests for quotas > 2G.
2841 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2842 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2843 filecount value is greater than 2G or if a quota value is greater than 2G
2844 on a system where the size of off_t is not greater than 4, a panic error
2847 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2848 never match. The debug and -bh output now contains an explicit error
2849 message indicating a malformed IPv4 address or mask.
2851 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2852 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2853 PH/23 above applies.
2855 PH/25 Do not write to syslog when running in the test harness. The only
2856 occasion when this arises is a failure to open the main or panic logs
2857 (for which there is an explicit test).
2859 PH/26 Added the /no_tell option to "control=freeze".
2861 PH/27 If a host name lookup failed very early in a connection, for example, if
2862 the IP address matched host_lookup and the reverse lookup yielded a name
2863 that did not have a forward lookup, an error message of the form "no IP
2864 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2865 could be logged. Now it outputs the IP address instead of "NULL".
2867 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2868 allows the sender and the authenticated sender to be set when
2869 submitting a message from within Exim. Since child_open_exim() is
2870 documented for local_scan(), the new function should be too.
2872 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2873 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2874 results in an empty string is now treated as unset.
2876 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2878 PH/31 Added sender_verify_fail logging option.
2880 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2881 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2882 tidied the source and removed it altogether.
2884 PH/33 When a queue run was abandoned because the load average was too high, a
2885 log line was always written; now it is written only if the queue_run log
2886 selector is set. In addition, the log line for abandonment now contains
2887 information about the queue run such as the pid. This is always present
2888 in "start" and "stop" lines but was omitted from the "abandon" line.
2890 PH/34 Omit spaces between a header name and the colon in the error message that
2891 is given when verify = headers_syntax fails (if there are lots of them,
2892 the message gets confusing).
2894 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2895 names, as there are now some PTR records that contain slashes. This check
2896 is only to protect against broken name servers that fall over on strange
2897 characters, so the fact that it applies to all lookups doesn't matter.
2899 PH/36 Now that the new test suite is complete, we can remove some of the
2900 special code in Exim that was needed for the old test suite. For example,
2901 sorting DNS records because real resolvers return them in an arbitrary
2902 order. The new test suite's fake resolver always returns records in the
2905 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2906 bounces) except when queue_only is set, to avoid logging races between
2907 the different processes.
2909 PH/38 Panic-die if .include specifies a non-absolute path.
2911 PH/39 A tweak to the "H" retry rule from its user.
2913 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2914 a label. They prevented compilation on older perls.
2916 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2917 a warning to be raised on newish perls.
2919 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2920 on queue. Changes to match documented behaviour of showing count of
2921 messages matching specified criteria.
2923 PH/40 Changed the default ident timeout from 30s to 5s.
2925 PH/41 Added support for the use of login_cap features, on those BSD systems
2926 that have them, for controlling the resources used by pipe deliveries.
2928 PH/42 The content-scanning code uses fopen() to create files in which to put
2929 message data. Previously it was not paying any attention to the mode of
2930 the files. Exim runs with umask(0) because the rest of the code creates
2931 files with open(), and sets the required mode explicitly. Thus, these
2932 files were ending up world-writeable. This was not a big issue, because,
2933 being within the spool directory, they were not world-accessible. I have
2934 created a function called modefopen, which takes an additional mode
2935 argument. It sets umask(777), creates the file, chmods it to the required
2936 mode, then resets the umask. All the relevant calls to fopen() in the
2937 content scanning code have been changed to use this function.
2939 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2940 to 24 hours. This avoids potential overflow problems when processing G
2941 and H retry rules. I suspect nobody ever tinkers with this value.
2943 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2945 PH/45 When the plaintext authenticator is running as a client, the server's
2946 challenges are checked to ensure they are valid base64 strings. By
2947 default, the authentication attempt is cancelled if an invalid string is
2948 received. Setting client_ignore_invalid_base64 true ignores these errors.
2949 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2950 they are received. Thus, the responses can be made to depend on the
2951 challenges. If an invalid string is ignored, an empty string is placed in
2954 PH/46 Messages that are created by the autoreply transport now contains a
2955 References: header, in accordance with RFCs 2822 and 3834.
2957 PH/47 Added authenticated_sender_force to the smtp transport.
2959 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2961 PH/49 Installed latest patch from the Sieve maintainer.
2963 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2964 was also set, the appendfile transport was unnecessarily scanning a
2965 directory of message files (e.g. for maildir delivery) to find the count
2966 of files (along with the size), even though it did not need this
2967 information. It now does the scan only if it needs to find either the
2968 size of the count of files.
2970 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2972 PH/52 Two bugs concerned with error handling when the smtp transport is
2975 (i) Exim was not creating retry information for temporary errors given
2976 for individual recipients after the DATA command when the smtp transport
2977 was used in LMTP mode. This meant that they could be retried too
2978 frequently, and not timed out correctly.
2980 (ii) Exim was setting the flag that allows error details to be returned
2981 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2982 recipients that were returned after the DATA command.
2984 PH/53 This is related to PH/52, but is more general: for any failing address,
2985 when detailed error information was permitted to be returned to the
2986 sender, but the error was temporary, then after the final timeout, only
2987 "retry timeout exceeded" was returned. Now it returns the full error as
2988 well as "retry timeout exceeded".
2990 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2991 do this, and (what is worse) MTAs that accept it.
2993 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2994 will now be deprecated.
2996 PH/56 New os.c-cygwin from the Cygwin maintainer.
2998 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2999 formats (previously only available in exim formats via -bpr, -bpru,
3000 and -bpra. Now also available in native and exiqgrep formats)
3002 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3003 with very large, slow to parse queues
3005 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3007 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3009 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3010 responses to authentication challenges, though it was showing the
3011 challenges; (ii) I've removed the CR characters from the debug output for
3014 PH/58 Allow for the insertion of a newline as well as a space when a string
3015 is turned into more than one encoded-word during RFC 2047 encoding. The
3016 Sieve code now uses this.
3018 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3019 data_4xx, lost_connection, tls_required.
3021 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3022 message was being sent as an SMTP response.
3024 PH/61 Add -l and -k options to exicyclog.
3026 PH/62 When verifying, if an address was redirected to one new address, so that
3027 verification continued, and the new address failed or deferred after
3028 having set something in $address_data, the value of $address_data was not
3029 passed back to the ACL. This was different to the case when no
3030 redirection occurred. The value is now passed back in both cases.
3032 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3033 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3034 use login_cap.h, so on its own it isn't the distinguishing feature. The
3035 new name refers directly to the setclassresources() function.
3037 PH/65 Added configuration files for NetBSD3.
3039 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3041 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3042 is preferred over IPv4.
3044 PH/68 The bounce_return_message and bounce_return_body options were not being
3045 honoured for bounces generated during the reception of non-SMTP messages.
3046 In particular, this applied to messages rejected by the ACL. This bug has
3047 been fixed. However, if bounce_return_message is true and bounce_return_
3048 body is false, the headers that are returned for a non-SMTP message
3049 include only those that have been read before the error was detected.
3050 (In the case of an ACL rejection, they have all been read.)
3052 PH/69 The HTML version of the specification is now built in a directory called
3053 spec_html instead of spec.html, because the latter looks like a path with
3054 a MIME-type, and this confuses some software.
3056 PH/70 Catch two compiler warnings in sieve.c.
3058 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3059 function verify_get_ident() calls ip_connect() to connect a socket, but
3060 if the "connect()" function timed out, ip_connect() used to close the
3061 socket. However, verify_get_ident() also closes the socket later, and in
3062 between Exim writes to the log, which may get opened at this point. When
3063 the socket was closed in ip_connect(), the log could get the same file
3064 descriptor number as the socket. This naturally causes chaos. The fix is
3065 not to close the socket in ip_connect(); the socket should be closed by
3066 the function that creates it. There was only one place in the code where
3067 this was missing, in the iplookup router, which I don't think anybody now
3068 uses, but I've fixed it anyway.
3070 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3071 well as to direct DNS lookups. Otherwise the handling of names in host
3072 lists is inconsistent and therefore confusing.
3078 PH/01 Two changes to the default runtime configuration:
3080 (1) Move the checks for relay_from_hosts and authenticated clients from
3081 after to before the (commented out) DNS black list checks.
3083 (2) Add control=submission to the relay_from_hosts and authenticated
3084 clients checks, on the grounds that messages accepted by these
3085 statements are most likely to be submissions.
3087 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3089 (1) Generate an error if the third argument for the ${prvs expansion is
3092 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3095 (3) Reset the variables that are obtained from the first argument of
3096 ${prvscheck and used in the second argument before leaving the code,
3097 because their memory is reclaimed, so using them afterwards may do
3100 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3101 one (it's much easier than Tom thought :-).
3103 (5) Because of (4), we can now allow for the use of $prvscheck_result
3104 inside the third argument.
3106 PH/03 For some reason, the default setting of PATH when running a command from
3107 a pipe transport was just "/usr/bin". I have changed it to
3110 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3111 anything to be listed in the output from -bV.
3113 PH/05 When a filter generated an autoreply, the entire To: header line was
3114 quoted in the delivery log line, like this:
3116 => >A.N.Other <ano@some.domain> <original@ddress> ...
3118 This has been changed so that it extracts the operative address. There
3119 may be more than one such address. If so, they are comma-separated, like
3122 => >ano@some.domain,ona@other.domain <original@ddress> ...
3124 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3125 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3126 not being looked up in the rDNS to get a host name, Exim was showing the
3127 IP address twice in Received: lines, even though the IP addresses were
3128 identical. For example:
3130 Received: from [1.2.3.4] (helo=[1.2.3.4])
3132 However, if the real host name was known, it was omitting the HELO data
3133 if it matched the actual IP address. This has been tidied up so that it
3134 doesn't show the same IP address twice.
3136 PH/07 When both +timestamp and +memory debugging was on, the value given by
3137 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3138 called by the debug printing, thereby overwriting the timestamp buffer.
3139 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3141 PH/08 When the original message was included in an autoreply transport, it
3142 always said "this is a copy of the message, including all the headers",
3143 even if body_only or headers_only was set. It now gives an appropriate
3146 PH/09 Applied a patch from the Sieve maintainer which:
3148 o fixes some comments
3149 o adds the (disabled) notify extension core
3150 o adds some debug output for the result of if/elsif tests
3151 o points to the current vacation draft in the documentation
3152 and documents the missing references header update
3156 o fixes a bug in processing the envelope test (when testing
3157 multiple envelope elements, the last element determinted the
3160 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3161 Electronic Mail") by including:
3163 Auto-submitted: auto-generated
3165 in the messages that it generates (bounce messages and others, such as
3166 warnings). In the case of bounce messages for non-SMTP mesages, there was
3167 also a typo: it was using "Auto_submitted" (underscore instead of
3168 hyphen). Since every message generated by Exim is necessarily in response
3169 to another message, thes have all been changed to:
3171 Auto-Submitted: auto-replied
3173 in accordance with these statements in the RFC:
3175 The auto-replied keyword:
3177 - SHOULD be used on messages sent in direct response to another
3178 message by an automatic process,
3180 - MUST NOT be used on manually-generated messages,
3182 - MAY be used on Delivery Status Notifications (DSNs) and Message
3183 Disposition Notifications (MDNs),
3185 - MUST NOT be used on messages generated by automatic or periodic
3186 processes, except for messages which are automatic responses to
3189 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3190 to the default Received: header definition.
3192 PH/12 Added log selector acl_warn_skipped (default on).
3194 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3195 variables because (a) they are in the wrong storage pool and (b) even if
3196 they were copied, it wouldn't work properly because of the caching.
3198 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3199 checking when decoding. Apparently there are clients that generate
3200 overlong encoded strings. Why am I not surprised?
3202 PH/15 If the first argument of "${if match_address" was not empty, but did not
3203 contain an "@" character, Exim crashed. Now it writes a panic log message
3204 and treats the condition as false.
3206 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3208 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3209 extension "envelope-auth". The code is finished and in agreement with
3210 other implementations, but there is no documentation so far and in fact,
3211 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3212 not changing the active code.
3214 Print executed "if" and "elsif" statements when debugging is used. This
3215 helps a great deal to understand what a filter does.
3217 Document more things not specified clearly in RFC3028. I had all this
3218 sorted out, when out of a sudden new issues came to my mind. Oops."
3220 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3223 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3224 canonical form (as documented). However, after a host name lookup from
3225 the IP address, check_host() was doing a simple string comparison with
3226 addresses acquired from the DNS when checking that the found name did
3227 have the original IP as one of its addresses. Since any found IPv6
3228 addresses are likely to be in abbreviated form, the comparison could
3229 fail. Luckily, there already exists a function for doing the comparison
3230 by converting both addresses to binary, so now that is used instead of
3231 the text comparison.
3233 PH/20 There was another similar case to PH/19, when a complete host name was
3234 given in a host list; looking up its IP address could give an abbreviated
3235 form, whereas the current host's name might or might not be abbreviated.
3236 The same fix has been applied.
3242 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3243 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3246 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3247 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3249 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3251 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3252 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3253 Also, for "Auto-Submitted", treat anything other than "no" as
3254 non-personal, in accordance with RFC 3834. (Previously it treated
3255 anything starting "auto-" as non-personal.)
3257 TF/01 The control=submission/name=... option had a problem with syntax
3258 errors if the name included a slash character. The /name= option
3259 now slurps the rest of the string, so it can include any characters
3260 but it must come last in the list of options (after /sender_retain
3263 PH/05 Some modifications to the interface to the fake nameserver for the new
3271 TK/01 Added the "success_on_redirect" address verification option. See
3272 NewStuff for rationale and an example.
3274 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3276 PH/02 Patch to exigrep to allow it to work on syslog lines.
3278 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3279 fread() to skip over the body file's header line, because in Cygwin the
3280 header line is locked and is inaccessible.
3282 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3283 co-exist for some time) to make it clear that it is the Exim ID that is
3284 referenced, not the Message-ID: header line.
3286 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3287 string_format() function, because snprintf() does not exist on all
3290 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3291 ${stat: expansion item.
3293 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3294 protocol synchronization error", to keep the pedants happy.
3296 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3297 well as for IRIX systems, when gcc is being used. See the host.c source
3300 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3302 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3305 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3306 transport and to the smtp transport in LMTP mode.
3308 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3310 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3311 run a filter in a subprocess. This could lead to confusion in subsequent
3312 lookups in the parent process. There should also be a search_tidyup() at
3313 the end of the subprocess.
3315 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3316 only if the host matched helo_try_verify_hosts, which caused the
3317 verification to occur when the EHLO/HELO command was issued. The ACL just
3318 tested the remembered result. Now, if a previous verification attempt has
3319 not happened, "verify = helo" does it there and then.
3321 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3323 TK/03 Fix log output including CR from clamd.
3325 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3326 exist provoked a memory error which could cause a segfault.
3328 PH/15 Installed PCRE 6.2
3330 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3332 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3333 of the problem. Specifically, suggested +O2 rather than +O1 for the
3336 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3338 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3339 record, the port was not correctly logged when the outgoing_port log
3340 selector was set (it logged the transort's default port).
3342 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3343 fallback_hosts, and "hosts" in the smtp transport.
3345 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3346 host errors such as "Connection refused".
3348 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3349 authentication with radiusclient 0.4.9:
3351 - Error returned from rc_read_config was caught wrongly
3352 - Username/password not passed on to radius server due to wrong length.
3354 The presumption is that some radiusclient API changes for 4.51/PH/17
3355 were not taken care of correctly. The code is still untested by me (my
3356 Linux distribution still has 0.3.2 of radiusclient), but it was
3357 contributed by a Radius user.
3359 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3360 expanding the "port" option of the smtp transport.
3362 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3363 while reading a MIME header. Thanks to Tom Hughes for a patch.
3365 PH/24 Include config.h inside local_scan.h so that configuration settings are
3368 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3369 that in an ACL for RCPT (for example), you can examine exactly what was
3372 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3373 commands, but it was not correctly comparing the address with the actual
3374 client host address. Thus, it would show the EHLO address in Received:
3375 header lines when this was not necessary.
3377 PH/27 Added the % operator to ${eval:}.
3379 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3380 it should be ignoring failures (because with -C, for example, it has lost
3381 privilege). It wasn't ignoring creation failures other than "already
3384 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3387 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3388 because an input line was too long, either on its own, or by virtue of
3389 too many continuations, the temporary file was not being removed, and the
3390 return code was incorrect.
3392 PH/31 Missing "BOOL" in function definition in filtertest.c.
3394 PH/32 Applied Sieve patches from the maintainer.
3396 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3398 PH/33 Added "verify = not_blind".
3400 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3401 Local/Makefile (with some defaults set). These are used in built scripts
3402 such as exicyclog, but they have never been used in the exim_install
3403 script (though there are many overriding facilities there). I have
3404 arranged that the exim_install script now takes note of these two
3407 PH/35 Installed configuration files for Dragonfly.
3409 PH/36 When a locally submitted message by a trusted user did not contain a
3410 From: header, and the sender address was obtained from -f or from an SMTP
3411 MAIL command, and the trusted user did not use -F to supply a sender
3412 name, $originator_name was incorrectly used when constructing a From:
3413 header. Furthermore, $originator_name was used for submission mode
3414 messages from external hosts without From: headers in a similar way,
3415 which is clearly wrong.
3417 PH/37 Added control=suppress_local_fixups.
3419 PH/38 When log_selector = +received_sender was set, and the addition of the
3420 sender made the log line's construction buffer exactly full, or one byte
3421 less than full, an overflow happened when the terminating "\n" was
3424 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3425 when the result of a list match is failure because a DNS lookup failed.
3427 PH/40 RM_COMMAND is now used in the building process.
3429 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3430 the "build-* directories that it finds.
3432 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3433 address in a domain literal was a prefix of an interface address.
3435 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3436 when verifying a sender address, unless rewrite_headers is false.
3438 PH/44 Wrote a long comment about why errors_to addresses are verified as
3439 recipients, not senders.
3441 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3442 the ratelimit ACL was added.
3444 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3446 PH/46 Added extra information about PostgreSQL errors to the error string.
3448 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3449 avoiding the need to install special zones in a real server. This is
3450 backwards compatible; if it can't find the fake resolver, it drops back.
3451 Thus, both old and new test suites can be run.
3453 TF/02 Added util/ratelimit.pl
3455 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3456 clock is set back in time.
3458 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3459 Candler <B.Candler@pobox.com>.
3461 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3462 OK for addresses that are the result of redirections.
3464 PH/48 A number of further additions for the benefit of the new test suite,
3465 including a fake gethostbyname() that interfaces to the fake DNS resolver
3468 TF/06 The fix for widen_domains has also been applied to qualify_single and
3469 search_parents which are the other dnslookup options that can cause
3472 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3475 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3477 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3478 service" if it encountered an MX record with an empty target hostname.
3479 The message is now "an MX or SRV record indicated no SMTP service".
3481 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3482 if the DNS of the sending site is misconfigured. This is quite a
3483 common situation. This change restores the behaviour of treating a
3484 helo verification defer as a failure.
3486 PH/51 If self=fail was set on a router, the bounce message did not include the
3487 actual error message.
3493 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3495 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3496 command itself ended in error, the underlying message about the transport
3497 filter timeout was being overwritten with the pipe command error. Now the
3498 underlying error message should be appended to the second error message.
3500 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3502 PH/02 Reduce the amount of output that "make" produces by default. Full output
3503 can still be requested.
3505 PH/03 The warning log line about a condition test deferring for a "warn" verb
3506 was being output only once per connection, rather than after each
3507 occurrence (because it was using the same function as for successful
3508 "warn" verbs). This seems wrong, so I have changed it.
3510 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3511 it should not have, which might have caused a crash in the right
3512 circumstances, but probably never did.
3514 PH/04 Installed a modified version of Tony Finch's patch to make submission
3515 mode fix the return path as well as the Sender: header line, and to
3516 add a /name= option so that you can make the user's friendly name appear
3519 TF/03 Added the control = fakedefer ACL modifier.
3521 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3522 Mark Lowes for thorough testing.
3524 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3526 TK/03 Merged latest SRS patch from Miles Wilton.
3528 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3529 with the definition in sysexits.h (which is #included earlier).
3530 Fortunately, Exim does not actually use EX_OK. The code used to try to
3531 preserve the sysexits.h value, by assumimg that macro definitions were
3532 scanned for macro replacements. I have been disabused of this notion,
3533 so now the code just undefines EX_OK before #including unistd.h.
3535 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3536 in the smtp transport. When a block could not be written in a single
3537 write() function, the timeout was being re-applied to each part-write.
3538 This seems wrong - if the receiver was accepting one byte at a time it
3539 would take for ever. The timeout is now adjusted when this happens. It
3540 doesn't have to be particularly precise.
3542 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3543 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3545 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3546 without a domain if the check to <postmaster@domain> fails.
3548 SC/01 Eximstats: added -xls and the ability to specify output files
3549 (patch written by Frank Heydlauf).
3551 SC/02 Eximstats: use FileHandles for outputing results.
3553 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3555 SC/04 Eximstats: fixed display of large numbers with -nvr option
3557 SC/05 Eximstats: fixed merging of reports with empty tables.
3559 SC/06 Eximstats: added the -include_original_destination flag
3561 SC/07 Eximstats: removed tabs and trailing whitespace.
3563 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3565 TK/06 MBOX spool code: Add real "From " MBOX separator line
3566 so the .eml file is really in mbox format (even though
3567 most programs do not really care). Patch from Alex Miller.
3569 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3570 The latter is generated from $received_to and is only set if the
3571 message has one envelope recipient. SA can use these headers,
3572 obviously out-of-the-box. Patch from Alex Miller.
3574 PH/08 The ${def test on a variable was returning false if the variable's
3575 value was "0", contrary to what the specification has always said!
3576 The result should be true unless the variable is empty.
3578 PH/09 The syntax error of a character other than { following "${if
3579 def:variable_name" (after optional whitespace) was not being diagnosed.
3580 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3581 accidental colon was present, for example, could give incorrect results.
3583 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3584 result is used (not including appendfile, where other changes are about
3587 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3588 This involved changing a lot of size variables from int to off_t. It
3589 should work with maildirs and everything.
3591 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3592 spamd dying while we are connected to it.
3594 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3597 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3598 function for BDB 4.3.
3600 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3602 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3603 the sources for PCRE have been re-arranged and more files are now
3606 PH/15 The code I had for printing potentially long long variables in PH/11
3607 above was not the best (it lost precision). The length of off_t variables
3608 is now inspected at build time, and an appropriate printing format (%ld
3609 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3610 to be "long long int" or "long int". This is needed for the internal
3611 formatting function string_vformat().
3613 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3614 the configuration file to be ":syslog", then the script "guesses" where
3615 the logs files are, rather than using the compiled in default. In our
3616 case the guess is not the same as the compiled default, so the script
3617 suddenly stopped working when I started to use syslog. The patch checks
3618 to see if log_file_path is "". If so, it attempts to read it from exim
3619 with no configuration file to get the compiled in version, before it
3620 falls back to the previous guessing code."
3622 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3623 implementing BATV in an Exim configuration. See NewStuff for the gory
3626 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3627 Makefile that are specific to HP-UX.
3629 PH/18 If the "use_postmaster" option was set for a recipient callout together
3630 with the "random" option, the postmaster address was used as the MAIL
3631 FROM address for the random test, but not for the subsequent recipient
3632 test. It is now used for both.
3634 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3635 patch removes a few documentation additions to RFC 3028, because the
3636 latest draft now contains them. It adds the new en;ascii-case comparator
3637 and a new error check for 8bit text in MIME parts. Comparator and
3638 require names are now matched exactly. I enabled the subaddress
3639 extension, but it is not well tested yet (read: it works for me)."
3641 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3642 rework some of the code of TK/09 above to avoid the hardwired use of
3643 "%lld" and "long long". Replaced the call to snprintf() with a call to
3646 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3647 records point to non-existent hosts", "retry timeout exceeded", and
3648 "retry time not reached for any host after a long failure period".
3650 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3651 experimental DomainKeys support:
3653 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3654 (2) On an error such as an illegally used "control", the wrong name for
3655 the control was given.
3657 These problems did NOT occur unless DomainKeys support was compiled.
3659 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3661 PH/24 Added ${if match_ip condition.
3663 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3664 databases so that it will be absolutely obvious if a crash occurs in the
3665 DB library. This is a regular occurrence (often caused by mis-matched
3668 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3669 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3670 picked up on a user's system that detects such things. There doesn't seem
3671 to be a gcc warning option for this - only an attribute that has to be
3672 put on the function's prototype. It seems that in Fedora Core 4 they have
3673 set this on a number of new functions. No doubt there will be more in due
3676 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3677 specify a transport. However, if an address that was verified by such a
3678 router was the subject of a callout, Exim crashed because it tried to
3679 read the rcpt_include_affixes from the non-existent transport. Now it
3680 just assumes that the setting of that option is false. This bug was
3681 introduced by 4.51/PH/31.
3683 PH/28 Changed -d+all to exclude +memory, because that information is very
3684 rarely of interest, but it makes the output a lot bigger. People tend to
3685 do -d+all out of habit.
3687 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3688 code in os-type was giving problems when libc.so lives in lib64, like on
3691 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3692 aren't the modern standard, and it seems that some systems' include files
3693 don't always have them. Exim was already checking for some of the newer
3694 ones like T_AAAA, and defining it itself. I've added checks for all the
3695 record types that Exim uses.
3697 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3698 not automatically generating a new one, as it is supposed to. This
3699 prevented TLS from working. If the file did exist, but contained invalid
3700 data, a new version was generated, as expected. It was only the case of a
3701 non-existent file that was broken.
3703 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3704 with a change in libdomainkeys > 0.64.
3706 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3707 from DNS. If the selector record carries the flag, it now has
3708 precedence over the domain-wide flag.
3710 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3712 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3713 the use of a port name that isn't defined in /etc/services) occurred, the
3714 message was deferred as in a normal delivery, and thus remained on the
3715 spool, instead of being failed because of the mua_wrapper setting. This
3716 is now fixed, and I tidied up some of the mua_wrapper messages at the
3719 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3720 the messages in a hash of arrays rather than using individual hashes.
3721 This is a bit cleaner and results in dramatic memory savings, albeit
3722 at a slight CPU cost.
3724 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3725 as requested by Marc Sherman.
3727 SC/10 Eximstats: added histograms for user specified patterns as requested
3730 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3732 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3733 fopen() in the content-scanning modules that did not already have it.
3739 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3740 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3742 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3744 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3746 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3747 to test Sieve filters that use "vacation".
3749 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3750 that changes the way the GnuTLS parameters are stored in the cache file.
3751 The new format can be generated externally. For backward compatibility,
3752 if the data in the cache doesn't make sense, Exim assumes it has read an
3753 old-format file, and it generates new data and writes a new file. This
3754 means that you can't go back to an older release without removing the
3757 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3758 work if there are any delivery delays because "one_time" forces the
3759 parent to be marked "delivered", so its unseen clone is never tried
3760 again. For this reason, Exim now forbids the simultaneous setting of
3763 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3764 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3765 entry if you want to know the details. The fix, however, neglected to
3766 consider the case when local delivery batching is involved. The test for
3767 "previously delivered" was not happening when checking to see if an
3768 address could be batched with a previous (undelivered) one; under
3769 certain circumstances this could lead to multiple deliveries to the same
3772 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3773 in its include files, and this causes problems building Exim.
3775 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3776 header_syntax) but Exim was just ignoring anything given after a slash.
3777 In particular, this caused confusion with an attempt to use "verify =
3778 reverse_host_lookup/defer_ok". An error is now given when options are
3779 supplied for verify items that do not have them. (Maybe reverse_host_
3780 lookup should have a defer_ok option, but that's a different point.)
3782 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3783 defined by RFC 821) to 2048, because there were problems with some AUTH
3784 commands, and RFC 1869 says the size should be increased for extended
3785 SMTP commands that take arguments.
3787 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3790 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3791 "unknown" error; now it says that the functionality isn't in the binary.
3793 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3794 an address' error message when a string expansion fails (syntax or
3795 whatever). Otherwise the password may appear in the log. Following change
3796 PH/42 below, there is no longer a chance of it appearing in a bounce
3799 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3801 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3802 of its addresses was ever tried. (Bugzilla bug #2.)
3804 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3805 the result incorrectly in the debug output. (It correctly added a newline
3806 to what was transported.)
3808 TF/01 Added $received_time.
3810 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3811 commented out examples of how to interface to a virus scanner and to
3812 SpamAssassin. Also added commented examples of av_scanner and
3813 spamd_address settings.
3815 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3816 and controls are allowed in which ACLs. There were a couple of minor
3817 errors. Some of the entries in the conditions table (which is a table of
3818 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3819 negation of where the condition IS allowed.
3821 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3823 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3824 header file does not have a version number, so I've had to invent a new
3825 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3826 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3827 radiusclient), but it was contributed by a Radius user.
3829 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3830 files or directories, for OpenSSL.
3832 PH/19 When an Exim process that is running as root has to create an Exim log
3833 file, it does so in a subprocess that runs as exim:exim so as to get the
3834 ownership right at creation (otherwise, other Exim processes might see
3835 the file with the wrong ownership). There was no test for failure of this
3836 fork() call, which would lead to the process getting stuck as it waited
3837 for a non-existent subprocess. Forks do occasionally fail when resources
3838 run out. I reviewed all the other calls to fork(); they all seem to check
3841 PH/20 When checking for unexpected SMTP input at connect time (before writing
3842 the banner), Exim was not dealing correctly with a non-positive return
3843 from the read() function. If the client had disconnected by this time,
3844 the result was a log entry for a synchronization error with an empty
3845 string after "input=" when read() returned zero. If read() returned -1
3846 (an event I could not check), uninitialized data bytes were printed.
3847 There were reports of junk text (parts of files, etc) appearing after
3850 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3852 PH/22 Added support for macro redefinition, and (re)definition in between
3853 driver and ACL definitions.
3855 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3856 forgetting to use the resulting value; it was using the unexpanded value.
3858 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3859 hadn't been configured. The fix is from Juergen Kreileder, who
3860 understands it better than I do:
3862 "Here's what I see happening with three configured cyrus_sasl
3863 authenticators configured (plain, login, cram-md5):
3865 On startup auth_cyrus_sasl_init() gets called for each of these.
3866 This means three calls to sasl_listmech() without a specified mech_list.
3867 => SASL tests which mechs of all available mechs actually work
3868 => three warnings about OTP not working
3869 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3871 With the patch, sasl_listmech() also gets called three times. But now
3872 SASL's mech_list option is set to the server_mech specified in the the
3873 authenticator. Or in other words, the answer from sasl_listmech()
3874 gets limited to just the mech you're testing for (which is different
3876 => the return list contains just 'plain' or 'login', 'cram-md5' or
3877 nothing depending on the value of ob->server_mech.
3879 I've just tested the patch: Authentication still works fine,
3880 unavailable mechs specified in the exim configuration are still
3881 caught, and the auth.log warnings about OTP are gone."
3883 PH/25 When debugging is enabled, the contents of the command line are added
3884 to the debugging output, even when log_selector=+arguments is not
3887 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3888 answer is "GNU", and only if the return is "GNU/something" is the answer
3891 PH/27 $acl_verify_message is now set immediately after the failure of a
3892 verification in an ACL, and so is available in subsequent modifiers. In
3893 particular, the message can be preserved by coding like this:
3895 warn !verify = sender
3896 set acl_m0 = $acl_verify_message
3898 Previously, $acl_verify_message was set only while expanding "message"
3899 and "log_message" when a very denied access.
3901 PH/28 Modified OS/os.c-Linux with
3903 -#ifndef OS_LOAD_AVERAGE
3904 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3906 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3907 nomenclature these days.)
3909 PH/29 Installed patch from the Sieve maintainer that adds the options
3910 sieve_useraddress and sieve_subaddress to the redirect router.
3912 PH/30 In these circumstances:
3913 . Two addresses routed to the same list of hosts;
3914 . First host does not offer TLS;
3915 . First host accepts first address;
3916 . First host gives temporary error to second address;
3917 . Second host offers TLS and a TLS session is established;
3918 . Second host accepts second address.
3919 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3920 and peerdn, if requested) that were in fact used only for the second
3923 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3924 attention to any local part prefix or suffix that was matched by the
3925 router that accepted the address. It now behaves in the same way as it
3926 does for delivery: the affixes are removed from the local part unless
3927 rcpt_include_affixes is set on the transport.
3929 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3930 timeout during the DATA phase of an incoming message.
3932 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3933 applied a patch sanctioned by the Sieve maintainer.
3935 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3936 the uid or gid is negative. A case of a negative gid caused this to be
3937 noticed. The fix allows for either to be negative.
3939 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3940 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3943 PH/36 The change PH/12 above was broken. Fixed it.
3945 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3946 the grounds that routing the same address twice would always produce the
3947 same answer. This might have been true once, but it is certainly no
3948 longer true now. Routing a child address may depend on the previous
3949 routing that produced that child. Some complicated redirection strategies
3950 went wrong when messages had multiple recipients, and made Exim's
3951 behaviour dependent on the order in which the addresses were given.
3953 I have moved the duplicate checking until after the routing is complete.
3954 Exim scans the addresses that are assigned to local and remote
3955 transports, and removes any duplicates. This means that more work will be
3956 done, as duplicates will always all be routed, but duplicates are
3957 presumably rare, so I don't expect this is of any significance.
3959 For deliveries to pipes, files, and autoreplies, the duplicate checking
3960 still happens during the routing process, since they are not going to be
3963 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3964 It corrects a timeout issue with spamd. This is Ian's comment: "The
3965 background is that sometimes spamd either never reads data from a
3966 connection it has accepted, or it never writes response data. The exiscan
3967 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3968 blindly assumes that writes won't block so it may never time out."
3970 PH/39 Allow G after quota size as well as K and M.
3972 PH/40 The value set for $authenticated_id in an authenticator may not contain
3973 binary zeroes or newlines because the value is written to log lines and
3974 to spool files. There was no check on this. Now the value is run through
3975 the string_printing() function so that such characters are converted to
3976 printable escape sequences.
3978 PH/41 $message_linecount is a new variable that contains the total number of
3979 lines in the message. Compare $body_linecount, which is the count for the
3982 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3983 bounce and delay warning messages, except in certain special cases, which
3986 (a) An SMTP error message from a remote host;
3987 (b) A message specified in a :fail: redirection;
3988 (c) A message specified in a "fail" command in a system filter;
3989 (d) A message specified in a FAIL return from the queryprogram router;
3990 (e) A message specified by the cannot_route_message router option.
3992 In these cases only, Exim does include the error details in bounce and
3993 warning messages. There are also a few cases where bland messages such
3994 as "unrouteable address" or "local delivery error" are given.
3996 PH/43 $value is now also set for the "else" part of a ${run expansion.
3998 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3999 being worked on, but at least Exim now implements the latest version to
4002 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4003 process to complete was treated as a delivery failure, a timeout while
4004 writing the message to the pipe was logged, but erroneously treated as a
4005 successful delivery. Such timeouts include transport filter timeouts. For
4006 consistency with the overall process timeout, these timeouts are now
4007 treated as errors, giving rise to delivery failures by default. However,
4008 there is now a new Boolean option for the pipe transport called
4009 timeout_defer, which, if set TRUE, converts the failures into defers for
4010 both kinds of timeout. A transport filter timeout is now identified in
4013 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4014 systems where "make" and "gmake" are different, calling "gmake" at top
4015 level broke things. I've arranged for the value of $(MAKE) to be passed
4016 from the Makefile to this script so that it can call the same version of
4020 A note about Exim versions 4.44 and 4.50
4021 ----------------------------------------
4023 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4024 changes of various kinds. As a consequence, a big documentation update was
4025 needed. This delayed the release for rather longer than seemed good, especially
4026 in the light of a couple of (minor) security issues. Therefore, the changes
4027 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4028 release. So 4.44 and 4.50 are in effect two different branches that both start
4031 I have left the 4.50 change log unchanged; it contains all the changes since
4032 4.43. The change log for 4.44 is below; many of its items are identical to
4033 those for 4.50. This seems to be the most sensible way to preserve the
4034 historical information.
4040 1. Minor wording change to the doc/README.SIEVE file.
4042 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4043 computation of the current number of files was incorrect.
4045 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4046 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4049 4. Give more explanation in the error message when the command for a transport
4050 filter fails to execute.
4052 5. There are several places where Exim runs a non-Exim command in a
4053 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4054 was being done only for the command run by the queryprogram router. It is
4055 now done for all such subprocesses. The other cases are: ${run, transport
4056 filters, and the commands run by the lmtp and pipe transports.
4058 6. Added CONFIGURE_GROUP build-time option.
4060 7. Some older OS have a limit of 256 on the maximum number of file
4061 descriptors. Exim was using setrlimit() to set 1000 as a large value
4062 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4063 systems. I've change it so that if it can't get 1000, it tries for 256.
4065 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4066 was an oversight, and furthermore, ever since the addition of extra
4067 controls (e.g. 4.43/32), the checks on when to allow different forms of
4068 "control" were broken. There should now be diagnostics for all cases when a
4069 control that does not make sense is encountered.
4071 9. Added the /retain_sender option to "control=submission".
4073 10. $recipients is now available in the predata ACL (oversight).
4075 11. Tidy the search cache before the fork to do a delivery from a message
4076 received from the command line. Otherwise the child will trigger a lookup
4077 failure and thereby defer the delivery if it tries to use (for example) a
4078 cached ldap connection that the parent has called unbind on.
4080 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4081 of $address_data from the recipient verification was clobbered by the
4082 sender verification.
4084 13. The value of address_data from a sender verification is now available in
4085 $sender_address_data in subsequent conditions in the ACL statement.
4087 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4089 15. Added a new option "connect=<time>" to callout options, to set a different
4092 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4093 was its contents. (It was OK if the option was not defined at all.)
4095 17. A "Completed" log line is now written for messages that are removed from
4096 the spool by the -Mrm option.
4098 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4099 information about exactly what failed.
4101 19. Added -dd to debug only the daemon process.
4103 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4104 handles timeouts, both on the server side and network timeouts. Renamed the
4105 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4107 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4108 It is now set to "smtps".
4110 22. $host_address is now set to the target address during the checking of
4111 ignore_target_hosts.
4113 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4114 being passed; this would have caused $sender_host_name to have been used if
4115 matching the list had actually called for a host name (not very likely,
4116 since this list is usually IP addresses). A host name is now passed as
4119 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4120 code that specifies a non-restarting handler (typically sigaction() in
4121 modern systems) in an attempt to fix a rare and obscure crash bug.
4123 25. Narrowed the window for a race in the daemon that could cause it to ignore
4124 SIGCHLD signals. This is not a major problem, because they are used only to
4125 wake it up if nothing else does.
4127 26. A malformed maildirsize file could cause Exim to calculate negative values
4128 for the mailbox size or file count. Odd effects could occur as a result.
4129 The maildirsize information is now recalculated if the size or filecount
4132 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4133 support for a long time. Removed HAVE_SYS_VFS_H.
4135 28. Installed the latest version of exipick from John Jetmore.
4137 29. In an address list, if the pattern was not a regular expression, an empty
4138 subject address (from a bounce message) matched only if the pattern was an
4139 empty string. Non-empty patterns were not even tested. This was the wrong
4140 because it is perfectly reasonable to use an empty address as part of a
4141 database query. An empty address is now tested by patterns that are
4142 lookups. However, all the other forms of pattern expect the subject to
4143 contain a local part and a domain, and therefore, for them, an empty
4144 address still always fails if the pattern is not itself empty.
4146 30. Exim went into a mad DNS loop when attempting to do a callout where the
4147 host was specified on an smtp transport, and looking it up yielded more
4148 than one IP address.
4150 31. Re-factored the code for checking spool and log partition space into a
4151 function that finds that data and another that does the check. The former
4152 is then used to implement four new variables: $spool_space, $log_space,
4153 $spool_inodes, and $log_inodes.
4155 32. The RFC2047 encoding function was originally intended for short strings
4156 such as real names; it was not keeping to the 75-character limit for
4157 encoded words that the RFC imposes. It now respects the limit, and
4158 generates multiple encoded words if necessary. To be on the safe side, I
4159 have increased the buffer size for the ${rfc2047: expansion operator from
4162 33. It is now permitted to omit both strings after an "if" condition; if the
4163 condition is true, the result is "true". As before, when the second string
4164 is omitted, a false condition yields an empty string. This makes it less
4165 cumbersome to write custom ACL and router conditions.
4167 34. Failure to deliver a bounce message always caused it to be frozen, even if
4168 there was an errors_to setting on the router. The errors_to setting is now
4171 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4172 canonical form (fully expanded) before being placed in
4173 $sender_host_address.
4175 36. The table in the code that translates DNS record types into text (T_A to
4176 "A" for instance) was missing entries for NS and CNAME. It is just possible
4177 that this could have caused confusion if both these types were looked up
4178 for the same domain, because the text type is used as part of Exim's
4179 per-process caching. But the chance of anyone hitting this buglet seems
4182 37. The dnsdb lookup has been extended in a number of ways.
4184 (1) There is a new type, "zns", which walks up the domain tree until it
4185 finds some nameserver records. It should be used with care.
4187 (2) There is a new type, "mxh", which is like "mx" except that it returns
4188 just the host names, not the priorities.
4190 (3) It is now possible to give a list of domains (or IP addresses) to be
4191 looked up. The behaviour when one of the lookups defers can be
4192 controlled by a keyword.
4194 (4) It is now possible to specify the separator character for use when
4195 multiple records are returned.
4197 38. The dnslists ACL condition has been extended: it is now possible to supply
4198 a list of IP addresses and/or domains to be looked up in a particular DNS
4201 39. Added log_selector=+queue_time_overall.
4203 40. When running the queue in the test harness, wait just a tad after forking a
4204 delivery process, to get repeatability of debugging output.
4206 41. Include certificate and key file names in error message when GnuTLS fails
4207 to set them up, because the GnuTLS error message doesn't include the name
4208 of the failing file when there is a problem reading it.
4210 42. Allow both -bf and -bF in the same test run.
4212 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4214 44. The "Exiscan patch" is now merged into the mainline Exim source.
4216 45. Sometimes the final signoff response after QUIT could fail to get
4217 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4218 < 0 before doing a fflush(). This bug looks as though it goes back to the
4219 introduction of TLS in release 3.20, but "sometimes" must have been rare
4220 because the tests only now provoked it.
4222 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4223 (this can affect the format of dates).
4225 47. exim_tidydb, when checking for the continued existence of a message for
4226 which it has found a message-specific retry record, was not finding
4227 messages that were in split spool directories. Consequently, it was
4228 deleting retry records that should have stayed in existence.
4230 48. Steve fixed some bugs in eximstats.
4232 49. The SPA authentication driver was not abandoning authentication and moving
4233 on to the next authenticator when an expansion was forced to fail,
4234 contradicting the general specification for all authenticators. Instead it
4235 was generating a temporary error. It now behaves as specified.
4237 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4238 (the order specifies the preference for clients). The order is now AES256,
4239 AES128, 3DES, ARCFOUR128.
4241 51. Small patch to Sieve code - explicitly set From: when generating an
4244 52. Exim crashed if a remote delivery caused a very long error message to be
4245 recorded - for instance if somebody sent an entire SpamAssassin report back
4246 as a large number of 550 error lines. This bug was coincidentally fixed by
4247 increasing the size of one of Exim's internal buffers (big_buffer) that
4248 happened as part of the Exiscan merge. However, to be on the safe side, I
4249 have made the code more robust (and fixed the comments that describe what
4252 53. Now that there can be additional text after "Completed" in log lines (if
4253 the queue_time_overall log selector is set), a one-byte patch to exigrep
4254 was needed to allow it to recognize "Completed" as not the last thing in
4257 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4258 patch that reportedly fixes this has been added. I am not expert enough to
4259 create a test for it. This is what the patch creator wrote:
4261 "I found a little strange behaviour of ldap code when working with
4262 Windows 2003 AD Domain, where users was placed in more than one
4263 Organization Units. When I tried to give exim partial DN, the exit code
4264 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4265 But simultaneously result of request was absolutely normal ldap result,
4266 so I produce this patch..."
4268 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4269 REFERENCE, so I have modified the code to exclude the patch when that macro
4272 55. Some experimental protocols are using DNS PTR records for new purposes. The
4273 keys for these records are domain names, not reversed IP addresses. The
4274 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4275 leaves it alone. Component reversal etc. now happens only for IP addresses.
4278 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4280 57. Double the size of the debug message buffer (to 2048) so that more of very
4281 long debug lines gets shown.
4283 58. The exicyclog utility now does better if the number of log files to keep
4284 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4286 59. Two changes related to the smtp_active_hostname option:
4288 (1) $smtp_active_hostname is now available as a variable.
4289 (2) The default for smtp_banner uses $smtp_active_hostname instead
4290 of $primary_hostname.
4292 60. The host_aton() function is supposed to be passed a string that is known
4293 to be a valid IP address. However, in the case of IPv6 addresses, it was
4294 not checking this. This is a hostage to fortune. Exim now panics and dies
4295 if the condition is not met. A case was found where this could be provoked
4296 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4297 components; fortuitously, this particular loophole had already been fixed
4298 by change 4.50/55 above.
4300 If there are any other similar loopholes, the new check in host_aton()
4301 itself should stop them being exploited. The report I received stated that
4302 data on the command line could provoke the exploit when Exim was running as
4303 exim, but did not say which command line option was involved. All I could
4304 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4305 running as the user.
4308 61. There was a buffer overflow vulnerability in the SPA authentication code
4309 (which came originally from the Samba project). I have added a test to the
4310 spa_base64_to_bits() function which I hope fixes it.
4313 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4314 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4316 63. The daemon start-up calls getloadavg() while still root for those OS that
4317 need the first call to be done as root, but it missed one case: when
4318 deliver_queue_load_max is set with deliver_drop_privilege. This is
4319 necessary for the benefit of the queue runner, because there is no re-exec
4320 when deliver_drop_privilege is set.
4322 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4323 This has been fixed.
4325 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4326 was in use, was not putting the data itself into the right store pool;
4327 consequently, it could be overwritten for a subsequent message in the same
4328 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4331 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4333 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4334 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4335 the function were treating the return as a boolean value, which happened to
4336 work because 0=false and not-0=true, but is not correct code.
4338 68. The host_aton() function was not handling scoped IPv6 addresses (those
4339 with, for example, "%eth0" on the end) correctly.
4341 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4342 negated items (that is, ~something) in unsigned ints. Some compilers
4343 apparently mutter when there is no cast.
4345 70. If an address verification called from an ACL failed, and did not produce a
4346 user-specific message (i.e. there was only a "system" message), nothing was
4347 put in $acl_verify_message. In this situation, it now puts the system
4350 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4351 session; change 4.31/43 added the unwanted input to the log line - except
4352 that it did not do this in the start of session case. It now does.
4354 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4355 This is wrong and can cause the other end to generate a synchronization
4356 error if it is another Exim or anything else that does the synchronization
4357 check. A QUIT command is no longer sent after a timeout.
4359 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4360 during host lookups.
4362 74. The defer_ok option of callout verification was not working if it was used
4363 when verifying addresses in header lines, that is, for this case:
4365 verify = header_sender/callout=defer_ok
4367 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4368 those file descriptors could be used for SMTP connections. If anything
4369 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4370 could be sent to the SMTP client, causing chaos. The daemon now opens
4371 stdin, stdout, and stderr to /dev/null when it puts itself into the
4374 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4375 log by default. The user can override this with suitable Perl magic.
4377 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4378 the log message when discard triggers, was not working for the DATA ACL or
4379 for the non-SMTP ACL.
4381 78. Error message wording change in sieve.c.
4383 79. If smtp_accept_max_per_host was set, the number of connections could be
4384 restricted to fewer than expected, because the daemon was trying to set up
4385 a new connection before checking whether the processes handling previous
4386 connections had finished. The check for completed processes is now done
4387 earlier. On busy systems, this bug wouldn't be noticed because something
4388 else would have woken the daemon, and it would have reaped the completed
4391 80. If a message was submitted locally by a user whose login name contained one
4392 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4393 It caused a spool format error. I have fixed the spool reading code. A
4394 related problem was that the "from" clause in the Received: line became
4395 illegal because of the space(s). It is now covered by ${quote_local_part.
4397 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4400 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4402 83. Patch from Sieve maintainer to fix unterminated string problem in
4403 "vacation" handling.
4405 84. Some minor changes to the Linux configuration files to help with other
4406 OS variants using glibc.
4408 85. One more patch for Sieve to update vacation handling to latest spec.
4411 ----------------------------------------------------
4412 See the note above about the 4.44 and 4.50 releases.
4413 ----------------------------------------------------
4419 1. Change 4.43/35 introduced a bug that caused file counts to be
4420 incorrectly computed when quota_filecount was set in an appendfile
4423 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4424 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4427 3. Give more explanation in the error message when the command for a transport
4428 filter fails to execute.
4430 4. There are several places where Exim runs a non-Exim command in a
4431 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4432 was being done only for the command run by the queryprogram router. It is
4433 now done for all such subprocesses. The other cases are: ${run, transport
4434 filters, and the commands run by the lmtp and pipe transports.
4436 5. Some older OS have a limit of 256 on the maximum number of file
4437 descriptors. Exim was using setrlimit() to set 1000 as a large value
4438 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4439 systems. I've change it so that if it can't get 1000, it tries for 256.
4441 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4442 was an oversight, and furthermore, ever since the addition of extra
4443 controls (e.g. 4.43/32), the checks on when to allow different forms of
4444 "control" were broken. There should now be diagnostics for all cases when a
4445 control that does not make sense is encountered.
4447 7. $recipients is now available in the predata ACL (oversight).
4449 8. Tidy the search cache before the fork to do a delivery from a message
4450 received from the command line. Otherwise the child will trigger a lookup
4451 failure and thereby defer the delivery if it tries to use (for example) a
4452 cached ldap connection that the parent has called unbind on.
4454 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4455 of $address_data from the recipient verification was clobbered by the
4456 sender verification.
4458 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4459 was its contents. (It was OK if the option was not defined at all.)
4461 11. A "Completed" log line is now written for messages that are removed from
4462 the spool by the -Mrm option.
4464 12. $host_address is now set to the target address during the checking of
4465 ignore_target_hosts.
4467 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4468 being passed; this would have caused $sender_host_name to have been used if
4469 matching the list had actually called for a host name (not very likely,
4470 since this list is usually IP addresses). A host name is now passed as
4473 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4474 code that specifies a non-restarting handler (typically sigaction() in
4475 modern systems) in an attempt to fix a rare and obscure crash bug.
4477 15. Narrowed the window for a race in the daemon that could cause it to ignore
4478 SIGCHLD signals. This is not a major problem, because they are used only to
4479 wake it up if nothing else does.
4481 16. A malformed maildirsize file could cause Exim to calculate negative values
4482 for the mailbox size or file count. Odd effects could occur as a result.
4483 The maildirsize information is now recalculated if the size or filecount
4486 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4487 support for a long time. Removed HAVE_SYS_VFS_H.
4489 18. Updated exipick to current release from John Jetmore.
4491 19. Allow an empty sender to be matched against a lookup in an address list.
4492 Previously the only cases considered were a regular expression, or an
4495 20. Exim went into a mad DNS lookup loop when doing a callout where the
4496 host was specified on the transport, if the DNS lookup yielded more than
4499 21. The RFC2047 encoding function was originally intended for short strings
4500 such as real names; it was not keeping to the 75-character limit for
4501 encoded words that the RFC imposes. It now respects the limit, and
4502 generates multiple encoded words if necessary. To be on the safe side, I
4503 have increased the buffer size for the ${rfc2047: expansion operator from
4506 22. Failure to deliver a bounce message always caused it to be frozen, even if
4507 there was an errors_to setting on the router. The errors_to setting is now
4510 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4511 canonical form (fully expanded) before being placed in
4512 $sender_host_address.
4514 24. Updated eximstats to version 1.33
4516 25. Include certificate and key file names in error message when GnuTLS fails
4517 to set them up, because the GnuTLS error message doesn't include the name
4518 of the failing file when there is a problem reading it.
4520 26. Expand error message when OpenSSL has problems setting up cert/key files.
4523 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4524 (this can affect the format of dates).
4526 28. exim_tidydb, when checking for the continued existence of a message for
4527 which it has found a message-specific retry record, was not finding
4528 messages that were in split spool directories. Consequently, it was
4529 deleting retry records that should have stayed in existence.
4531 29. eximstats updated to version 1.35
4532 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4533 1.35 - bugfix such that pie charts by volume are generated correctly
4535 30. The SPA authentication driver was not abandoning authentication and moving
4536 on to the next authenticator when an expansion was forced to fail,
4537 contradicting the general specification for all authenticators. Instead it
4538 was generating a temporary error. It now behaves as specified.
4540 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4541 (the order specifies the preference for clients). The order is now AES256,
4542 AES128, 3DES, ARCFOUR128.
4544 31. Small patch to Sieve code - explicitly set From: when generating an
4547 32. Exim crashed if a remote delivery caused a very long error message to be
4548 recorded - for instance if somebody sent an entire SpamAssassin report back
4549 as a large number of 550 error lines. This bug was coincidentally fixed by
4550 increasing the size of one of Exim's internal buffers (big_buffer) that
4551 happened as part of the Exiscan merge. However, to be on the safe side, I
4552 have made the code more robust (and fixed the comments that describe what
4555 33. Some experimental protocols are using DNS PTR records for new purposes. The
4556 keys for these records are domain names, not reversed IP addresses. The
4557 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4558 leaves it alone. Component reversal etc. now happens only for IP addresses.
4561 34. The host_aton() function is supposed to be passed a string that is known
4562 to be a valid IP address. However, in the case of IPv6 addresses, it was
4563 not checking this. This is a hostage to fortune. Exim now panics and dies
4564 if the condition is not met. A case was found where this could be provoked
4565 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4566 components; fortuitously, this particular loophole had already been fixed
4567 by change 4.50/55 or 4.44/33 above.
4569 If there are any other similar loopholes, the new check in host_aton()
4570 itself should stop them being exploited. The report I received stated that
4571 data on the command line could provoke the exploit when Exim was running as
4572 exim, but did not say which command line option was involved. All I could
4573 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4574 running as the user.
4577 35. There was a buffer overflow vulnerability in the SPA authentication code
4578 (which came originally from the Samba project). I have added a test to the
4579 spa_base64_to_bits() function which I hope fixes it.
4582 36. The daemon start-up calls getloadavg() while still root for those OS that
4583 need the first call to be done as root, but it missed one case: when
4584 deliver_queue_load_max is set with deliver_drop_privilege. This is
4585 necessary for the benefit of the queue runner, because there is no re-exec
4586 when deliver_drop_privilege is set.
4588 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4589 was in use, was not putting the data itself into the right store pool;
4590 consequently, it could be overwritten for a subsequent message in the same
4591 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4594 38. Sometimes the final signoff response after QUIT could fail to get
4595 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4596 < 0 before doing a fflush(). This bug looks as though it goes back to the
4597 introduction of TLS in release 3.20, but "sometimes" must have been rare
4598 because the tests only now provoked it.
4604 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4605 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4606 Now it returns an integer. A number of calls were still expecting a T/F
4607 return. Fortuitously, in all cases, the tests worked in OK situations,
4608 which is the norm. However, things would have gone wrong on any write
4609 failures on the smtp file descriptor. This function is used when sending
4610 messages over SMTP and also when doing verify callouts.
4612 2. When Exim is called to do synchronous delivery of a locally submitted
4613 message (the -odf or -odi options), it no longer closes stderr before doing
4616 3. Implemented the mua_wrapper option.
4618 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4620 5. Implemented the functions header_remove(), header_testname(),
4621 header_add_at_position(), and receive_remove_recipient(), and exported them
4624 6. If an ACL "warn" statement specified the addition of headers, Exim already
4625 inserted X-ACL-Warn: at the start if there was no header name. However, it
4626 was not making this test for the second and subsequent header lines if
4627 there were newlines in the string. This meant that an invalid header could
4628 be inserted if Exim was badly configured.
4630 7. Allow an ACL "warn" statement to add header lines at the start or after all
4631 the Received: headers, as well as at the end.
4633 8. Added the rcpt_4xx retry error code.
4635 9. Added postmaster_mailfrom=xxx to callout verification option.
4637 10. Added mailfrom=xxxx to the callout verification option, for verify=
4640 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4641 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4643 12. Inserted some casts to stop certain compilers warning when using pointer
4644 differences as field lengths or precisions in printf-type calls (mostly
4645 affecting debugging statements).
4647 13. Added optional readline() support for -be (dynamically loaded).
4649 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4650 same clock tick as a message's arrival, so that its received time was the
4651 same as the "first fail" time on the retry record, and that message
4652 remained on the queue past the ultimate address timeout, every queue runner
4653 would try a delivery (because it was past the ultimate address timeout) but
4654 after another failure, the ultimate address timeout, which should have then
4655 bounced the address, did not kick in. This was a "< instead of <=" error;
4656 in most cases the first failure would have been in the next clock tick
4657 after the received time, and all would be well.
4659 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4660 being recognized when the domain list was tested by the match_domain
4661 condition in an expansion string.
4663 16. Added the ${str2b64: operator.
4665 17. Exim was always calling setrlimit() to set a large limit for the number of
4666 processes, without checking whether the existing limit was already
4667 adequate. (It did check for the limit on file descriptors.) Furthermore,
4668 errors from getrlimit() and setrlimit() were being ignored. Now they are
4669 logged to the main and panic logs, but Exim does carry on, to try to do its
4670 job under whatever limits there are.
4672 18. Imported PCRE 5.0.
4674 19. Trivial typo in log message " temporarily refused connection" (the leading
4677 20. If the log selector return_path_on_delivery was set and an address was
4678 redirected to /dev/null, the delivery process crashed because it assumed
4679 that a return path would always be set for a "successful" delivery. In this
4680 case, the whole delivery is bypassed as an optimization, and therefore no
4683 21. Internal re-arrangement: the function for sending a challenge and reading
4684 a response while authentication was assuming a zero-terminated challenge
4685 string. It's now changed to take a pointer and a length, to allow for
4686 binary data in such strings.
4688 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4690 23. Exim was not respecting finduser_retries when seeking the login of the
4691 uid under which it was called; it was always trying 10 times. (The default
4692 setting of finduser_retries is zero.) Also, it was sleeping after the final
4693 failure, which is pointless.
4695 24. Implemented tls_on_connect_ports.
4697 25. Implemented acl_smtp_predata.
4699 26. If the domain in control=submission is set empty, Exim assumes that the
4700 authenticated id is a complete email address when it generates From: or
4701 Sender: header lines.
4703 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4704 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4705 chown and chgrp in /bin and hostname in /usr/bin.
4707 28. Exim was keeping the "process log" file open after each use, just as it
4708 does for the main log. This opens the possibility of it remaining open for
4709 long periods when the USR1 signal hits a daemon. Occasional processlog
4710 errors were reported, that could have been caused by this. Anyway, it seems
4711 much more sensible not to leave this file open at all, so that is what now
4714 29. The long-running daemon process does not normally write to the log once it
4715 has entered its main loop, and it closes the log before doing so. This is
4716 so that log files can straightforwardly be renamed and moved. However,
4717 there are a couple of unusual error situations where the daemon does write
4718 log entries, and I had neglected to close the log afterwards.
4720 30. The text of an SMTP error response that was received during a remote
4721 delivery was being truncated at 512 bytes. This is too short for some of
4722 the long messages that one sometimes sees. I've increased the limit to
4725 31. It is now possible to make retry rules that apply only when a message has a
4726 specific sender, in particular, an empty sender.
4728 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4729 it possible to be selective about when SMTP synchronization is enforced.
4731 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4733 32. Implemented hosts_connection_nolog.
4735 33. Added an ACL for QUIT.
4737 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4740 35. Added mailbox_size and mailbox_filecount to appendfile.
4742 36. Added control = no_multiline_responses to ACLs.
4744 37. There was a bug in the logic of the code that waits for the clock to tick
4745 in the case where the clock went backwards by a substantial amount such
4746 that the microsecond fraction of "now" was more than the microsecond
4747 fraction of "then" (but the whole seconds number was less).
4749 38. Added support for the libradius Radius client library this is found on
4750 FreeBSD (previously only the radiusclient library was supported).
4756 1. When certain lookups returned multiple values in the form name=value, the
4757 quoting of the values was not always being done properly. Specifically:
4758 (a) If the value started with a double quote, but contained no whitespace,
4760 (b) If the value contained whitespace other than a space character (i.e.
4761 tabs or newlines or carriage returns) it was not quoted.
4762 This fix has been applied to the mysql and pgsql lookups by writing a
4763 separate quoting function and calling it from the lookup code. The fix
4764 should probably also be applied to nisplus, ibase and oracle lookups, but
4765 since I cannot test any of those, I have not disturbed their existing code.
4767 2. A hit in the callout cache for a specific address caused a log line with no
4768 reason for rejecting RCPT. Now it says "Previous (cached) callout
4769 verification failure".
4771 3. There was an off-by-one bug in the queryprogram router. An over-long
4772 return line was truncated at 256 instead of 255 characters, thereby
4773 overflowing its buffer with the terminating zero. As well as fixing this, I
4774 have increased the buffer size to 1024 (and made a note to document this).
4776 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4777 when Exim is waiting for an SMTP response from a remote server, Exim
4778 restarts its select() call on the socket, thereby resetting its timeout.
4779 This is not a problem when such interrupts are rare. Somebody set up a cron
4780 job to run exiwhat every 2 minutes, which is less than the normal select()
4781 timeout (5 or 10 minutes). This meant that the select() timeout never
4782 kicked in because it was always reset. I have fixed this by comparing the
4783 time when an interrupt arrives with the time at the start of the first call
4784 to select(). If more time than the timeout has elapsed, the interrupt is
4785 treated as a timeout.
4787 5. Some internal re-factoring in preparation for the addition of Sieve
4788 extensions (by MH). In particular, the "personal" test is moved to a
4789 separate function, and given an option for scanning Cc: and Bcc: (which is
4790 not set for Exim filters).
4792 6. When Exim created an email address using the login of the caller as the
4793 local part (e.g. when creating a From: or Sender: header line), it was not
4794 quoting the local part when it contained special characters such as @.
4796 7. Installed new OpenBSD configuration files.
4798 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4799 try to make them clearer.
4801 9. Callout options, other than the timeout value, were being ignored when
4802 verifying sender addresses in header lines. For example, when using
4804 verify = header_sender/callout=no_cache
4806 the cache was (incorrectly) being used.
4808 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4809 only the Cygwin environment.
4811 11. When return_path_on_delivery was set as a log selector, if different remote
4812 addresses in the same message used different return paths and parallel
4813 remote delivery occurred, the wrong values would sometimes be logged.
4814 (Whenever a remote delivery process finished, the return path value from
4815 the most recently started remote delivery process was logged.)
4817 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4818 lines when AUTH and/or TLS are in use. This is the "received protocol"
4819 field. Exim used to use "asmtp" for authenticated SMTP, without any
4820 indication (in the protocol name) for TLS use. Now it follows the RFC and
4821 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4822 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4823 names appear in log lines as well as in Received: header lines.
4825 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4826 extensions, and comparison tests, and to fix some bugs.
4828 14. Changes to the "personal" filter test:
4830 (1) The test was buggy in that it was just doing the equivalent of
4831 "contains" tests on header lines. For example, if a user's address was
4832 anne@some.where, the "personal" test would incorrectly be true for
4834 To: susanne@some.where
4836 This test is now done by extracting each address from the header in turn,
4837 and checking the entire address. Other tests that are part of "personal"
4838 are now done using regular expressions (for example, to check local parts
4839 of addresses in From: header lines).
4841 (2) The list of non-personal local parts in From: addresses has been
4842 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4843 taken from the Sieve specification recommendations.
4845 (3) If the message contains any header line starting with "List-" it is
4846 treated as non-personal.
4848 (4) The test for "circular" in the Subject: header line has been removed
4849 because it now seems ill-conceived.
4851 15. Minor typos in src/EDITME comments corrected.
4853 16. Installed latest exipick from John Jetmore.
4855 17. If headers_add on a router specified a text string that was too long for
4856 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4857 of string_sprintf() is now avoided.
4859 18. $message_body_size was not set (it was always zero) when running the DATA
4860 ACL and the local_scan() function.
4862 19. For the "mail" command in an Exim filter, no default was being set for
4863 the once_repeat time, causing a random time value to be used if "once" was
4864 specified. (If the value happened to be <= 0, no repeat happened.) The
4865 default is now 0s, meaning "never repeat". The "vacation" command was OK
4866 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4867 (I found it when inspecting the code).
4869 20. There is now an overall timeout for performing a callout verification. It
4870 defaults to 4 times the callout timeout, which applies to individual SMTP
4871 commands during the callout. The overall timeout applies when there is more
4872 than one host that can be tried. The timeout is checked before trying the
4873 next host. This prevents very long delays if there are a large number of
4874 hosts and all are timing out (e.g. when the network connections are timing
4875 out). The value of the overall timeout can be changed by specifying an
4876 additional sub-option for "callout", called "maxwait". For example:
4878 verify = sender/callout=5s,maxwait=20s
4880 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4881 to the end before writing, but this should make it even safer).
4883 22. Exim was forgetting that it had advertised PIPELINING for the second and
4884 subsequent messages on an SMTP connection. It was also not resetting its
4885 memory on STARTTLS and an internal HELO.
4887 23. When Exim logs an SMTP synchronization error within a session, it now
4888 records whether PIPELINING has been advertised or not.
4890 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4891 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4892 rather than long int.
4894 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4896 26. Added the never_mail option to autoreply.
4902 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4903 crash if the getsockname() call failed; this can happen if a connection is
4904 closed very soon after it is established. The problem was simply in the
4905 order in which certain operations were done, causing Exim to try to write
4906 to the SMTP stream before it had set up the file descriptor. The bug has
4907 been fixed by making things happen in the correct order.
4913 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4914 before the connection was closed, thus losing the rejection response.
4916 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4917 some early Solaris releases, but causes trouble in current releases where
4918 socklen_t is defined.
4920 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4923 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4926 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4927 that releasing the top of it at the end releases what was used for sub-
4928 expansions (unless the block got too big). However, discard this block if
4929 the first thing is a variable or header, so that we can use its block when
4930 it is dynamic (useful for very large $message_headers, for example).
4932 6. Lookups now cache *every* query, not just the most recent. A new, separate
4933 store pool is used for this. It can be recovered when all lookup caches are
4934 flushed. Lookups now release memory at the end of their result strings.
4935 This has involved some general refactoring of the lookup sources.
4937 7. Some code has been added to the store_xxx() functions to reduce the amount
4938 of flapping under certain conditions.
4940 8. log_incoming_interface used to affect only the <= reception log lines. Now
4941 it causes the local interface and port to be added to several more SMTP log
4942 lines, for example "SMTP connection from", and rejection lines.
4944 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4946 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4948 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4949 could be overwritten at the end of the current message (or the start of a
4950 new message if it was set in a HELO ACL). The value is now preserved for
4951 the duration of the SMTP connection.
4953 12. If a transport had a headers_rewrite setting, and a matching header line
4954 contained an unqualified address, that address was qualified, even if it
4955 did not match any rewriting rules. The underlying bug was that the values
4956 of the flags that permit the existence of unqualified sender and recipient
4957 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4958 non-local messages, and by -bnq for local messages) were not being
4959 preserved with the message after it was received.
4961 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4962 "next input=" as part of the text comprising the host identity instead of
4963 the correct text. The code was using the same buffer for two different
4964 strings. However, depending on which order the printing function evaluated
4965 its arguments, the bug did not always show up. Under Linux, for example, my
4966 test suite worked just fine.
4968 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4969 doesn't work with some older versions of Perl. It has been changed to "my",
4970 which in any case is probably the better facility to use.
4972 15. A really picky compiler found some instances of statements for creating
4973 error messages that either had too many or two few arguments for the format
4976 16. The size of the buffer for calls to the DNS resolver has been increased
4977 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4978 for addresses that have a lot of PTR records. This alleviates a problem; it
4979 does not fully solve it.
4981 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4982 buffer now truncates the list and logs the incident, which is the same
4983 action as happens when Exim is looking up a host name and its aliases.
4984 Previously in this situation something unpredictable would happen;
4985 sometimes it was "internal error: store_reset failed".
4987 18. If a server dropped the connection unexpectedly when an Exim client was
4988 using GnuTLS and trying to read a response, the client delivery process
4989 crashed while trying to generate an error log message.
4991 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4992 string, for example:
4994 warn message = H1: something\nH2: something
4996 the text was added as a single header line from Exim's point of view
4997 though it ended up OK in the delivered message. However, searching for the
4998 second and subsequent header lines using $h_h2: did not work. This has been
4999 fixed. Similarly, if a system filter added multiple headers in this way,
5000 the routers could not see them.
5002 20. Expanded the error message when iplsearch is called with an invalid key to
5003 suggest using net-iplsearch in a host list.
5005 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5006 ACLs are no longer actually imposed (and a message to that effect is
5009 22. If a "gecos" field in a passwd entry contained escaped characters, in
5010 particular, if it contained a \" sequence, Exim got it wrong when building
5011 a From: or a Sender: header from that name. A second bug also caused
5012 incorrect handling when an unquoted " was present following a character
5013 that needed quoting.
5015 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5016 was not being matched caselessly.
5018 24. Arranged for all hyphens in the exim.8 source to be escaped with
5021 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5022 properly. Recipient callout cache records were still being keyed to include
5023 the sender, even when use_sender was set false. This led to far more
5024 callouts that were necessary. The sender is no longer included in the key
5025 when use_sender is false.
5027 26. Added "control = submission" modifier to ACLs.
5029 27. Added the ${base62d: operator to decode base 62 numbers.
5031 28. dnsdb lookups can now access SRV records.
5033 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5034 the configuration file.
5036 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5037 (-v) mode. This makes the output for a verbose queue run more intelligible.
5039 31. Added a use_postmaster feature to recipient callouts.
5041 32. Added the $body_zerocount variable, containing the number of binary zero
5042 bytes in the message body.
5044 33. The time of last modification of the "new" subdirectory is now used as the
5045 "mailbox time last read" when there is a quota error for a maildir
5048 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5050 35. Added +ignore_unknown as a special item in host lists.
5052 36. Code for decoding IPv6 addresses in host lists is now included, even if
5053 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5054 address was recognized as an IP address, but was then not correctly decoded
5055 into binary, causing unexpected and incorrect effects when compared with
5062 1. Very minor rewording of debugging text in manualroute to say "list of
5063 hosts" instead of "hostlist".
5065 2. If verify=header_syntax was set, and a header line with an unqualified
5066 address (no domain) and a large number of spaces between the end of the
5067 name and the colon was received, the reception process suffered a buffer
5068 overflow, and (when I tested it) crashed. This was caused by some obsolete
5069 code that should have been removed. The fix is to remove it!
5071 3. When running in the test harness, delay a bit after writing a bounce
5072 message to get a bit more predictability in the log output.
5074 4. Added a call to search_tidyup() just before forking a reception process. In
5075 theory, someone could use a lookup in the expansion of smtp_accept_max_
5076 per_host which, without the tidyup, could leave open a database connection.
5078 5. Added the variables $recipient_data and $sender_data which get set from a
5079 lookup success in an ACL "recipients" or "senders" condition, or a router
5080 "senders" option, similar to $domain_data and $local_part_data.
5082 6. Moved the writing of debug_print from before to after the "senders" test
5085 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5086 problems for message scanning, either using a data ACL, or using
5087 local_scan() because the Received: header was not generated till after they
5088 were called (in order to set the time as the time of reception completion).
5089 I have revised the way this works. The header is now generated after the
5090 body is received, but before the ACL or local_scan() are called. After they
5091 are run, the timestamp in the header is updated.
5097 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5098 before starting a queue runner without re-exec. This happened only when
5099 deliver_drop_privilege was set or when the Exim user was set to root. The
5100 effect of the bug was that timeouts during subsequent deliveries caused
5101 crashes instead of being properly handled. The handler is now left at its
5102 default (and expected) setting.
5104 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5105 message, again when deliver_drop_privilege is set or Exim is run as root.
5106 The bug described in (1) was not present in this case, but the tidying up
5107 of the other signals was missing. I have made the two cases consistent.
5109 3. The ignore_target_hosts setting on a manualroute router was being ignored
5110 for hosts that were looked up using the /MX notation.
5112 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5115 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5116 operated on the sender address. After changing the $sender_address to <>
5117 for the sender address verify, Exim was re-instated it as the original
5118 (before rewriting) address, but remembering that it had rewritten it, so it
5119 wasn't rewriting it again. This bug also had the effect of breaking the
5120 sender address verification caching when the sender address was rewritten.
5122 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5123 This has been changed so that if the ip literal address matches
5124 ignore_target_hosts, the router declines.
5126 7. Added expansion conditions match_domain, match_address, and match_local_
5127 part (NOT match_host).
5129 8. The placeholder for the Received: header didn't have a length field set.
5131 9. Added code to Exim itself and to exim_lock to test for a specific race
5132 condition that could lead to file corruption when using MBX delivery. The
5133 issue is with the lockfile that is created in /tmp. If this file is removed
5134 after a process has opened it but before that process has acquired a lock,
5135 there is the potential for a second process to recreate the file and also
5136 acquire a lock. This could lead to two Exim processes writing to the file
5137 at the same time. The added code performs the same test as UW imapd; it
5138 checks after acquiring the lock that its file descriptor still refers to
5139 the same named file.
5141 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5142 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5145 11. Added the smtp_active_hostname option. If used, this will typically be made
5146 to depend on the incoming interface address. Because $interface_address is
5147 not set up until the daemon has forked a reception process, error responses
5148 that can happen earlier (such as "too many connections") no longer contain
5151 12. If an expansion in a condition on a "warn" statement fails because a lookup
5152 defers, the "warn" statement is abandoned, and the next ACL statement is
5153 processed. Previously this caused the whole ACL to be aborted.
5155 13. Added the iplsearch lookup type.
5157 14. Added ident_timeout as a log selector.
5159 15. Added tls_certificate_verified as a log selector.
5161 16. Added a global option tls_require_ciphers (compare the smtp transport
5162 option of the same name). This controls incoming TLS connections.
5164 17. I finally figured out how to make tls_require_ciphers do a similar thing
5165 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5166 before starting the TLS session.
5168 18. Tabs are now shown as \t in -bP output.
5170 19. If the log selector return_path_on_delivery was set, Exim crashed when
5171 bouncing a message because it had too many Received: header lines.
5173 20. If two routers both had headers_remove settings, and the first one included
5174 a superfluous trailing colon, the final name in the first list and the
5175 first name in the second list were incorrectly joined into one item (with a
5176 colon in the middle).
5182 1. Added -C and -D options to the exinext utility, mainly to make it easier
5183 to include in the automated testing, but these could be helpful when
5184 multiple configurations are in use.
5186 2. The exinext utility was not formatting the output nicely when there was
5187 an alternate port involved in the retry record key, nor when there was a
5188 message id as well (for retries that were specific to a specific message
5189 and a specific host). It was also confused by IPv6 addresses, because of
5190 the additional colons they contain. I have fixed the IPv4 problem, and
5191 patched it up to do a reasonable job for IPv6.
5193 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5194 delivery, the log line now contains "pipelined" if PIPELINING was used.
5196 4. An SMTP transport process used to panic and die if the bind() call to set
5197 an explicit outgoing interface failed. This has been changed; it is now
5198 treated in the same way as a connect() failure.
5200 5. A reference to $sender_host_name in the part of a conditional expansion
5201 that was being skipped was still causing a DNS lookup. This no longer
5204 6. The def: expansion condition was not recognizing references to header lines
5205 that used bh_ and bheader_.
5207 7. Added the _cache feature to named lists.
5209 8. The code for checking quota_filecount in the appendfile transport was
5210 allowing one more file than it should have been.
5212 9. For compatibility with Sendmail, the command line option
5220 and sets the incoming protocol and host name (for trusted callers). The
5221 host name and its colon can be omitted when only the protocol is to be set.
5222 Note the Exim already has two private options, -pd and -ps, that refer to
5223 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5224 "s", but I don't think that's a major issue.
5226 10. A number of refactoring changes to the code, none of which should affect
5229 (a) The number of logging options was getting close to filling up the
5230 32-bit word that was used as a bit map. I have split them into two classes:
5231 those that are passed in the argument to log_write(), and those that are
5232 only ever tested independently outside of that function. These are now in
5233 separate 32-bit words, so there is plenty of room for expansion again.
5234 There is no change in the user interface or the logging behaviour.
5236 (b) When building, for example, log lines, the code previously used a
5237 macro that called string_cat() twice, in order to add two strings. This is
5238 not really sufficiently general. Furthermore, there was one instance where
5239 it was actually wrong because one of the argument was used twice, and in
5240 one call a function was used. (As it happened, calling the function twice
5241 did not affect the overall behaviour.) The macro has been replaced by a
5242 function that can join an arbitrary number of extra strings onto a growing
5245 (c) The code for expansion conditions now uses a table and a binary chop
5246 instead of a serial search (which was left over from when there were very
5247 few conditions). Also, it now recognizes conditions like "pam" even when
5248 the relevant support is not compiled in: a suitably worded error message is
5249 given if an attempt is made to use such a condition.
5251 11. Added ${time_interval:xxxxx}.
5253 12. A bug was causing one of the ddress fields not to be passed back correctly
5254 from remote delivery subprocesses. The field in question was not being
5255 subsequently used, so this caused to problems in practice.
5257 13. Added new log selectors queue_time and deliver_time.
5259 14. Might have fixed a bug in maildirsizefile handling that threw up
5260 "unexpected character" debug warnings, and recalculated the data
5261 unnecessarily. In any case, I expanded the warning message to give more
5264 15. Added the message "Restricted characters in address" to the statements in
5265 the default ACL that block characters like @ and % in local parts.
5267 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5268 Three changes have been made:
5270 (a) There was a serious bug; a negative response to MAIL caused the whole
5271 recipient domain to be cached as invalid, thereby blocking all messages
5272 to all local parts at the same domain, from all senders. This bug has
5273 been fixed. The domain is no longer cached after a negative response to
5274 MAIL if the sender used is not empty.
5276 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5279 (c) A new callout option, "use_sender" has been added for people who want
5280 the modified behaviour.
5286 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5289 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5290 indeed breaks things for older releases.
5292 3. Added additional logging to the case where there is a problem reading data
5293 from a filter that is running in a subprocess using a pipe, in order to
5294 try to track down a specific problem.
5296 4. Testing facility fudge: when running in the test harness and attempting
5297 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5298 getting "No route to host". Convert this to a timeout.
5300 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5303 6. Some OS don't have socklen_t but use size_t instead. This affects the
5304 fifth argument of getsockopt() amongst other things. This is now
5305 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5306 can be set for individual OS. I have set it for SunOS5, OSF1, and
5307 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5308 some earlier ones do not.
5310 7. Change 4.30/15 was not doing the test caselessly.
5312 8. The standard form for an IPv6 address literal was being rejected by address
5313 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5314 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5315 this, as well as the form without the "IPv6" on the front (but only when
5316 address literals are enabled, of course).
5318 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5320 10. Exim crashed if a message with an empty sender address specified by -f
5321 encountered a router with an errors_to setting. This could be provoked only
5322 by a command such as
5326 where an empty string was supplied; "<>" did not hit this bug.
5328 11. Installed PCRE release 4.5.
5330 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5331 remained set. It is now erased.
5333 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5334 times from message ids (which are base 36 rather than the normal 62).
5336 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5337 were being counted as actual protocol errors, and logged if the log
5338 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5339 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5340 and DATA following a set of rejected RCPTs do not count as protocol errors.
5341 In other words, Exim assumes they were pipelined, though this may not
5342 actually be the case. Of course, in all cases the client gets an
5343 appropriate error code.
5345 15. If a lookup fails in an ACL condition, a message about the failure may
5346 be available; it is used if testing the ACL cannot continue, because most
5347 such messages specify what the cause of the deferral is. However, some
5348 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5349 that caused an old message to be retained and used if a later statement
5350 caused a defer, replacing the real cause of the deferral.
5352 16. If an IP address had so many PTR records that the DNS lookup buffer
5353 was not large enough to hold them, Exim could crash while trying to process
5354 the truncated data. It now detects and logs this case.
5356 17. Further to 4.21/58, another change has been made: if (and only if) the
5357 first line of a message (the first header line) ends with CRLF, a bare LF
5358 in a subsequent header line has a space inserted after it, so as not to
5359 terminate the header.
5361 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5362 unnecessarily, used atoi() instead of strtol(), and didn't check the
5363 termination when getting file sizes from file names by regex.
5365 19. Completely re-implemented the support for maildirsize files, in the light
5366 of a number of problems with the previous contributed implementation
5367 (4.30/29). In particular:
5369 . If the quota is zero, the maildirsize file is maintained, but no quota is
5372 . If the maildir directory does not exist, it is created before any attempt
5373 to write a maildirsize file.
5375 . The quota value in the file is just a cache; if the quota is changed in
5376 the transport, the new value overrides.
5378 . A regular expression is available for excluding directories from the
5381 20. The autoreply transport checks the characters in options that define the
5382 message's headers; it allows continued headers, but it was checking with
5383 isspace() after an embedded newline instead of explicitly looking for a
5386 21. If all the "regular" hosts to which an address was routed had passed their
5387 expiry times, and had not reached their retry times, the address was
5388 bounced, even if fallback hosts were defined. Now Exim should go on to try
5391 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5392 equivalent code in the SMTP transport. Some hosts send humungous responses
5393 to HELO/EHLO, more than 1024 it seems.
5395 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5396 gives compiler warnings in some environments. I've now done it "properly",
5399 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5400 (because of problems with the built-in one) was declared to return uschar *
5401 instead of char *, causing compiler failure.
5403 25. Fixed a file descriptor leak when processing alias/forward files.
5405 26. Fixed a minor format string issue in dbfn.c.
5407 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5409 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5410 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5413 29. When a sender address is verified, it is cached, to save repeating the test
5414 when there is more than one recipient in a message. However, when the
5415 verification involves a callout, it is possible for different callout
5416 options to be set for different recipients. It is too complicated to keep
5417 track of this in the cache, so now Exim always runs a verification when a
5418 callout is required, relying on the callout cache for the optimization.
5419 The overhead is duplication of the address routing, but this should not be
5422 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5423 to be verified with callout=postmaster, and the main callout worked but the
5424 postmaster check failed, the verification correctly failed. However, if a
5425 subsequent RCPT command asked for sender verification *without* the
5426 postmaster check, incorrect caching caused this verification also to fail,
5429 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5430 it was not caching the DNS options (qualify_single, search_parents) that
5431 were used when the lookup failed. A subsequent lookup with different
5432 options therefore always gave the same answer, though there were cases
5433 where it should not have. (Example: a "domains = !$mx_any" option on a
5434 dnslookup router: the "domains" option is always processed without any
5435 widening, but the router might have qualify_single set.) Now Exim uses the
5436 cached value only when the same options are set.
5438 32. Added John Jetmore's "exipick" utility to the distribution.
5440 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5441 than a timeout (e.g. a certificate is required, and is not provided), an
5442 Exim server now closes the connection immediately. Previously it waited for
5443 the client to close - but if the client is SSL, it seems that they each
5444 wait for each other, leading to a delay before one of them times out.
5446 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5447 maintained 0.8.x compatibility because I don't think many are using it, and
5448 it is clearly obsolete.
5450 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5453 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5454 client certificate was expired. A simple patch fixes this, though I don't
5455 understand the full logic of why the verify callback is called multiple
5458 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5459 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5460 which causes problems with some clients (such as the Certicom SSL Plus
5461 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5462 disables the coutermeasure allowing Eudora to connect."
5464 38. Exim was not checking that a write() to a log file succeeded. This could
5465 lead to Bad Things if a log got too big, in particular if it hit a file
5466 size limit. Exim now panics and dies if it cannot write to a log file, just
5467 as it does if it cannot open a log file.
5469 39. Modified OS/Makefile-Linux so that it now contains
5471 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5473 The two -D definitions ensure that Exim is compiled with large file
5474 support, which makes it possible to handle log files that are bigger than
5477 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5478 instance) a domain was checked against a named list that involved a lookup,
5479 causing $domain_data to be set, then another domain was checked against the
5480 same list, then the first domain was re-checked, the value of $domain_data
5481 after the final check could be wrong. In particular, if the second check
5482 failed, it could be set empty. This bug probably also applied to
5485 41. The strip_trailing_dot option was not being applied to the address given
5486 with the -f command-line option.
5488 42. The code for reading a message's header from the spool was incrementing
5489 $received_count, but never initializing it. This meant that the value was
5490 incorrect (doubled) while delivering a message in the same process in which
5491 it was received. In the most common configuration of Exim, this never
5492 happens - a fresh exec is done - but it can happen when
5493 deliver_drop_privilege is set.
5495 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5496 it now includes up to 150 characters of the unexpected data in the log
5499 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5500 and building data strings. The size of both of these buffers was 10 000
5501 bytes - far larger than anybody would *ever* want, thought I. Needless to
5502 say, somebody hit the limit. I have increased the maximum line length to
5503 20 000 and the maximum data length of concatenated lines to 100 000. I have
5504 also fixed two bugs, because there was no checking on these buffers. Tsk,
5505 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5506 buffer is too small.
5508 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5509 lsearch lookups. Now it does.
5511 46. When parsing a route_list item in a manualroute router, a fixed-length
5512 buffer was used for the list of hosts. I made this 1024 bytes long,
5513 thinking that nobody would ever have a list of hosts that long. Wrong.
5514 Somebody had a whole pile of complicated expansion conditions, and the
5515 string was silently truncated, leading to an expansion error. It turns out
5516 that it is easier to change to an unlimited length (owing to other changes
5517 that have happened since this code was originally written) than to build
5518 structure for giving a limitation error. The length of the item that
5519 expands into the list of hosts is now unlimited.
5521 47. The lsearch lookup could not handle data where the length of text line was
5522 more than 4095 characters. Such lines were truncated, leading to shortened
5523 data being returned. It should now handle lines of any length.
5525 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5526 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5529 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5530 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5531 no longer happens in comment lines. A list of replacements is now placed
5532 at the head of all of the source files, except those whose only change is
5533 to replace PERL_COMMAND in the very first #! line.
5535 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5536 messages on the queue, with a bottom-up merge sort, using code contributed
5537 by Michael Haardt. This should make operations like -bp somewhat faster on
5538 large queues. It won't affect queue runners, except when queue_run_in_order
5541 51. Installed eximstats 1.31 in the distribution.
5543 52. Added support for SRV lookups to the dnslookup router.
5545 53. If an ACL referred to $message_body or $message_body_end, the value was not
5546 reset for any messages that followed in the same SMTP session.
5548 54. The store-handling optimization for building very long strings was not
5549 differentiating between the different store pools. I don't think this
5550 actually made any difference in practice, but I've tidied it.
5552 55. While running the routers to verify a sender address, $sender_address
5553 was still set to the sender address. This is wrong, because when routing to
5554 send a bounce to the sender, it would be empty. Therefore, I have changed
5555 it so that, while verifying a sender address, $sender_address is set to <>.
5556 (There is no change to what happens when verifying a recipient address.)
5558 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5559 target A or AAAA records (if not already returned) without resetting the
5560 qualify_single or search_parents options of the DNS resolver. These are
5561 inappropriate in this case because the targets of MX and SRV records must
5562 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5563 target that, when qualified, matched something in the local domain. These
5564 two options are now turned off when doing these lookups.
5566 57. It seems that at least some releases of Reiserfs (which does not have the
5567 concept of a fixed number of inodes) returns zero and not -1 for the
5568 number of available inodes. This interacted badly with check_spool_inodes,
5569 which assumed that -1 was the "no such thing" setting. What I have done is
5570 to check that the total number of inodes is greater than zero before doing
5571 the test of how many are available.
5573 58. When a "warn" ACL statement has a log_message modifier, the message is
5574 remembered, and not repeated. This is to avoid a lot of repetition when a
5575 message has many recipients that cause the same warning to be written.
5576 Howewer, Exim was preserving the list of already written lines for an
5577 entire SMTP session, which doesn't seem right. The memory is now reset if a
5578 new message is started.
5580 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5581 debugging output unless log_rewrite was also set.
5583 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5584 of (int)(handle) when we know that handle contains (void *)(-1).
5586 61. The Exim daemon panic-logs an error return when it closes the incoming
5587 connection. However "connection reset by peer" seems to be common, and
5588 isn't really an error worthy of noting specially, so that particular error
5591 62. When Exim is trying to find all the local interfaces, it used to panic and
5592 die if the ioctl to get the interface flags failed. However, it seems that
5593 on at least one OS (Solaris 9) it is possible to have an interface that is
5594 included in the list of interfaces, but for which you get a failure error
5595 for this call. This happens when the interface is not "plumbed" into a
5596 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5597 failure of the "get flags" call assumes that the interface is down.
5599 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5600 makes life easier for people who are doing arithmetic on fields extracted
5601 from dates, where you often get leading zeros that should not be
5602 interpreted as octal.
5604 64. Added qualify_domain to the redirect router, to override the global
5607 65. If a pathologically long header line contained very many addresses (the
5608 report of this problem mentioned 10 000) and each of them was rewritten,
5609 Exim could use up a very large amount of memory. (It kept on making new
5610 copies of the header line as it rewrote, and never released the old ones.)
5611 At the expense of a bit more processing, the header rewriting function has
5612 been changed so that it no longer eats memory in this way.
5614 66. The generation of the Received: header has been moved from the time that a
5615 message starts to be received, to the time that it finishes. The timestamp
5616 in the Received: header should now be very close to that of the <= log
5617 line. There are two side-effects of this change:
5619 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5620 logged header lines no longer include the local Received: line, because
5621 it has not yet been created. The same applies to a copy of the message
5622 that is returned to a non-SMTP sender when a message is rejected.
5624 (b) When a filter file is tested using -bf, no additional Received: header
5625 is added to the test message. After some thought, I decided that this
5628 This change does not affect the value of $received_for. It is still set
5629 after address rewriting, but before local_scan() is called.
5631 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5633 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5634 gave an unhelpful panic error message, and a defer error. I have managed to
5635 change this behaviour so that it now rejects any supplied certificate,
5636 which seems right, as the list of acceptable certificates is empty.
5638 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5639 gave an unhelpful defer error. I have not managed to make this reject any
5640 supplied certificates, but the error message it gives is "no certificate
5641 supplied", which is not helpful.
5643 70. exigrep's output now also includes lines that are not associated with any
5644 message, but which match the given pattern. Implemented by a patch from
5645 Martin Sluka, which also tidied up the Perl a bit.
5647 71. Recipient callout verification, like sender verification, was using <> in
5648 the MAIL FROM command. This isn't really the right thing, since the actual
5649 sender may affect whether the remote host accepts the recipient or not. I
5650 have changed it to use the actual sender in the callout; this means that
5651 the cache record is now keyed on a recipient/sender pair, not just the
5652 recipient address. There doesn't seem to be a real danger of callout loops,
5653 since a callout by the remote host to check the sender would use <>.
5654 [SEE ABOVE: changed after hitting problems.]
5656 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5657 temporary errors. However, in the case of such a code being given after
5658 the end of a data transmission (i.e. after ".") Exim was failing to write
5659 a retry record for the message. (Yes, there was some broken host that was
5660 actually sending 8xx at this point.)
5662 73. An unknown lookup type in a host list could cause Exim to panic-die when
5663 the list was checked. (An example that provoked this was putting <; in the
5664 middle of a list instead of at the start.) If this happened during a DATA
5665 ACL check, a -D file could be left lying around. This kind of configuration
5666 error no longer causes Exim to die; instead it causes a defer errror. The
5667 incident is still logged to the main and panic logs.
5669 74. Buglet left over from Exim 3 conversion. The message "too many messages
5670 in one connection" was written to the rejectlog but not the mainlog, except
5671 when address rewriting (yes!) was being logged.
5673 75. Added write_rejectlog option.
5675 76. When a system filter was run not as root (that is, when system_filter_user
5676 was set), the values of the $n variables were not being returned to the
5677 main process; thus, they were not subsequently available in the $sn
5680 77. Added +return_path_on_delivery log selector.
5682 78. A connection timeout was being treated differently from recipients deferred
5683 when testing hosts_max_try with a message that was older than the host's
5684 retry timeout. (The host should not be counted, thus allowing all hosts to
5685 be tried at least once before bouncing.) This may have been the cause of an
5686 occasionally reported bug whereby a message would remain on the queue
5687 longer than the retry timeout, but would be bounced if a delivery was
5688 forced. I say "may" because I never totally pinned down the problem;
5689 setting up timeout/retry tests is difficult. See also the next item.
5691 79. The ultimate address timeout was not being applied to errors that involved
5692 a combination of host plus message (for example, a timeout on a MAIL
5693 command). When an address resolved to a number of possible hosts, and they
5694 were not all tried for each delivery (e.g. because of hosts_max_try), a
5695 message could remain on the queue longer than the retry timeout.
5697 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5700 81. Fixed an obscure SMTP outgoing bug which required at least the following
5701 conditions: (a) there was another message waiting for the same server;
5702 (b) the server returned 5xx to all RCPT commands in the first message so
5703 that the message was not completed; (c) the server dropped the connection
5704 or gave a negative response to the RSET that Exim sends to abort the
5705 transaction. The observed case was a dropped connection after DATA that had
5706 been sent in pipelining mode. That is, the server had advertised PIPELINING
5707 but was not implementing it correctly. The effect of the bug was incorrect
5708 behaviour, such as trying another host, and this could lead to a crash.
5714 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5715 and daemon.c were passed as pointers to ints; they should have been
5716 pointers to socklen_t variables (which are typically unsigned ints).
5718 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5721 3. Fixed a really odd bug that affected only the testing scheme; patching a
5722 certain fixed string in the binary changed the value of another string that
5723 happened to be identical to the end of the original first string.
5725 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5726 name", it returns that address as the IP address. On some operating
5727 systems (e.g. Solaris), it also passes back the IP address string as the
5728 "host name". However, on others (e.g. Linux), it passes back an empty
5729 string. Exim wasn't checking for this, and was changing the host name to an
5730 empty string, assuming it had been canonicized.
5732 5. Although rare, it is permitted to have more than one PTR record for a given
5733 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5734 all the names associated with an address, because they do in Solaris.
5735 However, it seems that they do not in Linux for data that comes from the
5736 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5737 I found this out when I moved to a new Linux workstation and tried to run
5738 the Exim test suite.
5740 To get round this problem I have changed the code so that it now does its
5741 own call to the DNS to look up PTR records when searching for a host name.
5742 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5743 addresses that are only in /etc/hosts are still found.
5745 This behaviour is, however, controlled by an option called host_lookup_
5746 order, which defaults to "bydns:byaddr". If people want to use the other
5747 order, or indeed, just use one or the other means of lookup, they can
5748 specify it in this variable.
5750 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5751 some operating systems, this comes back from gethostbyaddr() as an empty
5752 string, and this is what Exim used to test for. However, it seems that in
5753 other systems, "." is yielded. Exim now tests for this case too.
5755 7. The values of check_spool_space and check_log_space are now held internally
5756 as a number of kilobytes instead of an absolute number of bytes. If a
5757 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5758 kilobyte. This means that much larger values can be stored.
5760 8. Exim monitor: an attempt to get the action menu when not actually pointing
5761 at a message produces an empty menu entitled "No message selected". This
5762 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5763 no entries in it ("Shell widget menu has zero width and/or height"). So I
5764 have added a single, blank menu entry in this case.
5766 9. Added ${quote_local_part.
5768 10. MIME decoding is now applied to the contents of Subject: header lines when
5771 11. Now that a reference to $sender_host_address automatically causes a reverse
5772 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5773 host lookup before query-style lookups in lists that might use this
5774 variable. This has therefore been abolished, and the "net-" prefix is no
5775 longer necessary for query-style lookups.
5777 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5778 have been a typo for LFLAGS, so it has been changed.
5780 13. The install script calls Exim with "-C /dev/null" in order to find the
5781 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5782 to be output. Howeve, since Exim outputs its version number before the
5783 error, it didn't break the script. It just looked ugly. I fixed this by
5784 always allowing "-C /dev/null" if the caller is root.
5786 14. Ignore overlarge ACL variable number when reading spool file - insurance
5787 against a later release with more variables having written the file.
5789 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5790 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5791 this, as well as the form without the "IPv6" on the front.
5793 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5794 OS/Makefile-Darwin file.
5796 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5797 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5799 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5800 variable. However, some OS use ints for inodes. I've added cast to long int
5801 to get rid of the compiler warning.
5803 19. I had forgotten to lock out "/../" in configuration file names when
5804 ALT_CONFIG_PREFIX was set.
5806 20. Routers used for verification do not need to specify transports. However,
5807 if such a router generated a host list, and callout was configured, Exim
5808 crashed, because it could not find a port number from the (non-existent)
5809 transport. It now assumes port 25 in this circumstance.
5811 21. Added the -t option to exigrep.
5813 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5814 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5815 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5816 them is set, LOOKUP_LSEARCH is forced.
5818 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5820 24. Added sender and host information to the "rejected by local_scan()" log
5821 line; previously there was no indication of these.
5823 25. Added .include_if_exists.
5825 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5826 Linux. It turns out that not all file systems support this. Apparently some
5827 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5828 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5829 not supported on the file descriptor, is now ignored when Exim is trying to
5830 sync a directory. This applies only to Linux.
5832 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5834 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5835 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5838 29. Added support for maildirsize files from supplied patch (modified a bit).
5840 30. The use of :fail: followed by an empty string could lead Exim to respond to
5841 sender verification failures with (e.g.):
5843 550 Verification failed for <xxx>
5844 550 Sender verify failed
5846 where the first response line was missing the '-' that indicates it is not
5847 the final line of the response.
5849 31. The loop for finding the name of the user that called Exim had a hardwired
5850 limit of 10; it now uses the value of finduser_retries, which is used for
5851 all other user lookups.
5853 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5856 33. Exim was neglecting to zero errno before one call of strtol() when
5857 expanding a string and expecting an integer value. On some systems this
5858 resulted in spurious "integer overflow" errors. Also, it was casting the
5859 result into an int without checking.
5861 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5862 did not work. The code looks as if it has *never* worked, though it appears
5863 to have been documented since at least releast 1.62. I have made it work.
5865 35. The "timeout_DNS" error in retry rules, also documented since at least
5866 1.62, also never worked. As it isn't clear exactly what this means, and
5867 clearly it isn't a major issue, I have abolished the feature by treating it
5868 as "timeout", and writing a warning to the main and panic logs.
5870 36. The display of retry rules for -brt wasn't always showing the error code
5873 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5874 timeout_connect_A, timeout_connect_MX.
5876 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5877 to the empty sender.
5879 39. The daemon was not analysing the content of -oX till after it had closed
5880 stderr and disconnected from the controlling terminal. This meant that any
5881 syntax errors were only noted on the panic log, and the return code from
5882 the command was 0. By re-arranging the code a little, I've made the
5883 decoding happen first, so such errors now appear on stderr, and the return
5884 code is 1. However, the actual setting up of the sockets still happens in
5885 the disconnected process, so errors there are still only recorded on the
5888 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5889 connections (as happens on some IP stacks) was logged at start up time as
5890 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5891 it from "IPv6 and IPv4", which means that two separate sockets are being
5894 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5895 says whether AF_INET or AF_INET6 was passed as an argument.
5897 42. Exiwhat output was messed up when time zones were included in log
5900 43. Exiwhat now gives more information about the daemon's listening ports,
5901 and whether -tls-on-connect was used.
5903 44. The "port" option of the smtp transport is now expanded.
5905 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5906 silently ignored. Now an error message is written to the main and panic
5909 46. There's a new ACL modifier called "logwrite" which writes to a log file
5910 as soon as it is encountered.
5912 47. Added $local_user_uid and $local_user_gid at routing time.
5914 48. Exim crashed when trying to verify a sender address that was being
5917 49. Exim was recognizing only a space character after ".include". It now also
5918 recognizes a tab character.
5920 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5921 extracting the relevant information from the specification. The man page no
5922 longer contains scrambled data for the -d option, and I've added a section
5923 at the front about calling Exim under different names.
5925 51. Added "extra_headers" argument to the "mail" command in filter files.
5927 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5930 53. Installed eximstats 1.29.
5932 54. Added transport_filter_timeout as a generic transport option.
5934 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5935 Cc: header lines. This was required by RFC 822, but it not required by RFC
5938 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5939 incoming messages that did not have them. Now it does so only if the
5940 message originates locally, that is, if there is no associated remote host
5941 address. When Resent- header lines are present, this applies to the Resent-
5942 lines rather than the non-Resent- lines.
5944 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5945 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5947 58. Messages for configuration errors now include the name of the main
5948 configuration file - useful now that there may be more than one file in a
5949 list (.included file names were always shown).
5951 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5952 for those rare installations that do not start the daemon as root or run it
5953 setuid root. I've cut out the call to initgroups() if the daemon is not
5956 60. The Exim user and group can now be bound into the binary as text strings
5957 that are looked up at the start of Exim's processing.
5959 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5961 62. Added $mailstore_basename variable.
5963 63. Installed patch to sieve.c from Michael Haardt.
5965 64. When Exim failed to open the panic log after failing to open the main log,
5966 the original message it was trying to log was written to stderr and debug
5967 output, but if they were not available (the usual case in production), it
5968 was lost. Now it is written to syslog before the two lines that record the
5969 failures to open the logs.
5971 65. Users' Exim filters run in subprocesses under the user's uid. It is
5972 possible for a "deliver" command or an alias in a "personal" command to
5973 provoke an address rewrite. If logging of address rewriting is configured,
5974 this fails because the process is not running as root or exim. There may be
5975 a better way of dealing with this, but for the moment (because 4.30 needs
5976 to be released), I have disabled address rewrite logging when running a
5977 filter in a non-root, non-exim process.
5983 1. The buildconfig auxiliary program wasn't quoting the value set for
5984 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5985 not defined. This bug was masked in 4.22 by the effect that was fixed in
5988 2. Some messages that were rejected after a message id was allocated were
5989 shown as "incomplete" by exigrep. It no longer does this for messages that
5990 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5992 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5993 have allow_domain_literals set, the ID did not get logged in the <= line.
5994 Domain literals are now always recognized in Message-ID: header lines.
5996 4. The first argument for a ${extract expansion item is the key name or field
5997 number. Leading and trailing spaces in this item were not being ignored,
5998 causing some misleading effects.
6000 5. When deliver_drop_privilege was set, single queue runner processes started
6001 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6002 same command in the process it spins off) were not dropping privilege.
6004 6. When the daemon running as "exim" started a queue runner, it always
6005 re-executed Exim in the spun-off process. This is a waste of effort when
6006 deliver_drop_privilege is set. The new process now just calls the
6007 queue-runner function directly.
6013 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6016 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6017 ignored. Though the use of -oP was forcing the writing of a pid file, it
6018 was always written to the default place.
6020 3. If the message "no IP address found for host xxxx" is generated during
6021 incoming verification, it is now followed by identification of the incoming
6022 connection (so you can more easily find what provoked it).
6024 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6026 5. Added some features to "harden" Exim a bit more against certain attacks:
6028 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6029 be put in Local/Makefile. This is like the never_users runtime option,
6030 but it cannot be overridden. The default setting is "root".
6032 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6033 prefix string with which any file named in a -C command line option
6036 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6037 is retained for -C and -D only if the caller of Exim is root. Without
6038 it, the exim user may also use -C and -D and retain privilege.
6040 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6041 command line option is disabled.
6043 6. Macro names set by the -D option must start with an upper case letter, just
6044 like macro names defined in the configuration file.
6046 7. Added "dereference=" facility to LDAP.
6048 8. Two instances of the typo "uknown" in the source files are fixed.
6050 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6051 the Configure-Makefile script screwed up while processing it.
6053 10. Incorporated PCRE 4.4.
6055 11. The SMTP synchronization check was not operating right at the start of an
6056 SMTP session. For example, it could not catch a HELO sent before the client
6057 waited for the greeting. There is now a check for outstanding input at the
6058 point when the greeting is written. Because of the duplex, asynchronous
6059 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6060 way, but not yet received, when the check is performed.
6062 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6063 on TCP/IP sockets, because this apparently causes some broken clients to
6066 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6067 unchanged) from the Cygwin maintainer.
6069 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6070 was supported instead of testing for mbx. Effectively a typo.
6072 15. The spa authenticator server code was not checking that the input it
6073 received was valid base64.
6075 16. The debug output line for the "set" modifier in ACLs was not showing the
6076 name of the variable that was being set.
6078 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6080 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6081 lookup on its own. Something else was needed to trigger the lookup. For
6082 example, a match in host_lookup or the need for a host name in a host list.
6083 Now, if $sender_host_name is referenced and the host name has not yet been
6084 looked up, a lookup is performed. If the lookup fails, the variable remains
6085 empty, and $host_lookup_failed is set to "1".
6087 19. Added "eqi" as a case-independent comparison operator.
6089 20. The saslauthd authentication condition could segfault if neither service
6090 nor realm was specified.
6092 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6093 error message that was logged was misleading, and incoming SMTP
6094 connections were dropped. The message is now more accurate, and temporary
6095 errors are given to SMTP connections.
6097 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6098 (except RSET) with a 421 error, until QUIT is received. However, it was
6099 failing to send a response to QUIT.
6101 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6102 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6103 ACL is now run after the helo_try_verify_hosts code.
6105 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6106 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6107 case-independent, so other case variants are also recognized). Apparently
6108 some systems use these upper case variants.
6110 25. If more than two messages were waiting for the same host, and a transport
6111 filter was specified for the transport, Exim sent two messages over the
6112 same TCP/IP connection, and then failed with "socket operation on non-
6113 socket" when it tried to send the third.
6115 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6117 27. The extern definition of crypt16() in expand.c was not being excluded when
6118 the OS had its own crypt16() function.
6120 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6121 as a preferred synonym for return_size_limit, both as an option and as an
6124 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6126 30. Changed the default configuration ACL to relax the local part checking rule
6127 for addresses that are not in any local domains. For these addresses,
6128 slashes and pipe symbols are allowed within local parts, but the sequence
6129 /../ is explicitly forbidden.
6131 31. SPA server authentication was not clearing the challenge buffer before
6134 32. log_message in a "warn" ACL statement was writing to the reject log as
6135 well as to the main log, which contradicts the documentation and doesn't
6136 seem right (because no rejection is happening). So I have stopped it.
6138 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6139 However, I am unable to do any testing of this.
6141 34. Fixed an infelicity in the appendfile transport. When checking directories
6142 for a mailbox, to see if any needed to be created, it was accidentally
6143 using path names with one or more superfluous leading slashes; tracing
6144 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6146 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6147 contents are added to the log line that is written for every discarded
6148 recipient. (Previously a log_message setting was ignored.)
6150 36. The ${quote: operator now quotes the string if it is empty.
6152 37. The install script runs exim in order to find its version number. If for
6153 some reason other than non-existence or emptiness, which it checks, it
6154 could not run './exim', it was installing it with an empty version number,
6155 i.e. as "exim-". This error state is now caught, and the installation is
6158 38. An argument was missing from the function that creates an error message
6159 when Exim fails to connect to the socket for saslauthd authentication.
6160 This could cause Exim to crash, or give a corrupted message.
6162 39. Added isip, isip4, and isip6 to ${if conditions.
6164 40. The ACL variables $acl_xx are now saved with the message, and can be
6165 accessed later in routers, transports, and filters.
6167 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6168 strings in the file are not string-expanded.
6170 42. If a MAIL command specified a SIZE value that was too large to fit into an
6171 int variable, the check against message_size_limit failed. Such values are
6172 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6173 day this will have to be increased, but I don't think I want to be around
6174 when emails are that large.
6181 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6182 iconv() is not standard in FreeBSD.
6184 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6185 IPv6 enabled. The observed symptom was a segmentation fault on return from
6186 the function os_common_find_running_interfaces() in src/os.c.
6188 3. In the check_special_case() function in daemon.c I had used "errno" as an
6189 argument name, which causes warnings on some systems. This was basically a
6190 typo, since it was named "eno" in the comments!
6192 4. The code that waits for the clock to tick (at a resolution of some fraction
6193 of a second) so as to ensure message-id uniqueness was always waiting for
6194 at least one whole tick, when it could have waited for less. [This is
6195 almost certainly not relevant at current processor speeds, where it is
6196 unlikely to ever wait at all. But we try to future-proof.]
6198 5. The function that sleeps for a time interval that includes fractions of a
6199 second contained a race. It did not block SIGALRM between setting the
6200 timer, and suspending (a couple of lines later). If the interval was short
6201 and the sigsuspend() was delayed until after it had expired, the suspension
6202 never ended. On busy systems this could lead to processes getting stuck for
6205 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6206 process, before it forks any delivery processes. The open lookup caching
6207 mechanism meant that the open file or database connection was passed into
6208 the delivery process. The problem was that delivery processes always tidy
6209 up cached lookup data. This could cause a problem for the next delivery
6210 process started by the queue runner, because the external queue runner
6211 process does not know about the closure. So the next delivery process
6212 still has data in the lookup cache. In the case of a file lookup, there was
6213 no problem because closing a file descriptor in a subprocess doesn't affect
6214 the parent. However, if the lookup was caching a connection to a database,
6215 the connection was closed, and the second delivery process was likely to
6216 see errors such as "PGSQL: query failed: server closed the connection
6217 unexpectedly". The problem has been fixed by closing all cached lookups
6218 in a queue runner before running a delivery process.
6220 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6221 seem to have the "const" qualifier which it has on other OS. I've
6224 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6225 *of the same type* (client or server) with the same public name that an
6226 error should be diagnosed.
6228 9. When Exim looked up a host name for an IP address, but failed to find the
6229 original IP address when looking up the host name (a safety check), it
6230 output the message "<ip address> does not match any IP for NULL", which was
6231 confusing, to say the least. The bug was that the host name should have
6232 appeared instead of "NULL".
6234 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6235 user that is built into the binary, and the -C or -D options is used, root
6236 privilege is dropped before the configuration file is read. In addition,
6237 logging is switched to stderr instead of the normal log files. If the
6238 configuration then re-defines the Exim user, the unprivileged environment
6239 is probably not what is expected, so Exim logs a panic warning message (but
6242 However, if deliver_drop_privilege is set, the unprivileged state may well
6243 be exactly what is intended, so the warning has been cut out in that case,
6244 and Exim is allowed to try to write to its normal log files.
6250 1. smtp_return_error_details was not giving details for temporary sender
6251 or receiver verification errors.
6253 2. Diagnose a configuration error if two authenticators have the same public
6256 3. Exim used not to create the message log file for a message until the first
6257 delivery attempt. This could be confusing when incoming messages were held
6258 for policy or load reasons. The message log file is now created at the time
6259 the message is received, and an initial "Received" line is written to it.
6261 4. The automatically generated man page for command line options had a minor
6262 bug that caused no ill effects; however, a more serious problem was that
6263 the procedure for building the man page automatically didn't always
6264 operate. Consequently, release 4.20 contains an out-of-date version. This
6265 shouldn't happen again.
6267 5. When building Exim with embedded Perl support, the script that builds the
6268 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6269 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6271 6. The freeze_tell option was not being used for messages that were frozen on
6272 arrival, either by an ACL or by local_scan().
6274 7. Added the smtp_incomplete_transaction log selector.
6276 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6277 was accepting AUTH without a new EHLO.
6279 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6280 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6283 10. Logging of TCP/IP connections (when configured) now happens in the main
6284 daemon process instead of the child process, so that the TCP/IP connection
6285 count is more accurate (but it can never be perfect).
6287 11. The use of "drop" in a nested ACL was not being handled correctly in the
6288 outer ACL. Now, if condition failure induced by the nested "drop" causes
6289 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6290 or "require"), the connection is dropped.
6292 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6293 that yield "discard" can now be used with an "accept" or a "discard" verb,
6294 but an error is generated for any others (because I can't see a useful way
6295 to define what should happen).
6297 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6298 are now processed in the same way as lines in the Exim configuration file.
6299 In particular, continuation lines are supported.
6301 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6303 15. Added -ti meaning -t -i.
6305 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6306 domains, and warn by logging if others are found.
6308 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
6309 returned from GIFCONF when Exim is trying to find the list of interfaces on
6310 a host. The code in os.c has been modified to copy each ifreq to an aligned
6311 structure in all cases.
6313 Also, in some cases, the returned ifreq's were being copied to a 'struct
6314 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6315 means the last couple of bytes of an IPv6 address could be chopped if the
6316 ifreq contained only a normal sockaddr (14 bytes storage).
6318 18. Named domain lists were not supported in the hosts_treat_as_local option.
6319 An entry such as +xxxx was not recognized, and was treated as a literal
6322 19. Ensure that header lines added by a DATA ACL are included in the reject log
6323 if the ACL subsequently rejects the message.
6325 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6326 MD5 (which is deprecated).
6328 21. When testing a filter file using -bf, Exim was writing a message when it
6329 took the sender from a "From " line in the message, but it was not doing so
6330 when it took $return_path from a Return-Path: header line. It now does.
6332 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6333 with a valid header line field name (a series of printing characters
6334 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6336 23. Changed "disc" in the source to "disk" to conform to the documentation and
6337 the book and for uniformity.
6339 24. Ignore Sendmail's -Ooption=value command line item.
6341 25. When execve() failed while trying to run a command in a pipe transport,
6342 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
6343 could be confused with a return value of 69 from the command itself. This
6344 has been changed to 127, the value the shell returns if it is asked to run
6345 a non-existent command. The wording for the related log line suggests a
6346 non-existent command as the problem.
6348 26. If received_header_text expands to an empty string, do not add a Received:
6349 header line to the message. (Well, it adds a token one on the spool, but
6350 marks it "old" so that it doesn't get used or transmitted.)
6352 27. Installed eximstats 1.28 (addition of -nt option).
6354 28. There was no check for failure on the call to getsockname() in the daemon
6355 code. This can fail if there is a shortage of resources on the system, with
6356 ENOMEM, for example. A temporary error is now given on failure.
6358 29. Contrary to the C standard, it seems that in some environments, the
6359 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6360 program. Exim now does this explicitly; it affects the formatting of
6361 timestamps using strftime().
6363 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6364 complaints. I've now initialized all the variables, to avoid this.
6366 32. Header lines added by a system filter were not being "seen" during
6367 transport-time rewrites.
6369 33. The info_callback() function passed to OpenSSL is set up with type void
6370 (*)(SSL *, int, int), as described somewhere. However, when calling the
6371 function (actually a macro) that sets it up, the type void(*)() is
6372 expected. I've put in a cast to prevent warnings from picky compilers.
6374 34. If a DNS black list lookup found a CNAME record, but there were no A
6375 records associated with the domain it pointed at, Exim crashed.
6377 35. If a DNS black list lookup returned more than one A record, Exim ignored
6378 all but the first. It now scans all returned addresses if a particular IP
6379 value is being sought. In this situation, the contents of the
6380 $dnslist_value variable are a list of all the addresses, separated by a
6383 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6384 to accept a host name and all its aliases if the forward lookup for any of
6385 them yielded the IP address of the incoming connection. Now it accepts only
6386 those names whose forward lookup yields the correct IP address. Any other
6387 names are discarded. This closes a loophole whereby a rogue DNS
6388 administrator could create reverse DNS records to break through a
6389 wildcarded host restriction in an ACL.
6391 37. If a user filter or a system filter that ran in a subprocess used any of
6392 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6393 the wrong values were passed to the pipe command ($thisaddress had the
6394 value of $0, $0 had the value of $1, etc). This bug was introduced by
6395 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6397 38. Improved the line breaking for long SMTP error messages from ACLs.
6398 Previously, if there was no break point between 40 and 75 characters, Exim
6399 left the rest of the message alone. Two changes have been made: (a) I've
6400 reduced the minimum length to 35 characters; (b) if it can't find a break
6401 point between 35 and 75 characters, it looks ahead and uses the first one
6402 that it finds. This may give the occasional overlong line, but at least the
6403 remaining text gets split now.
6405 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6406 file descriptors might be low, and that setting 1000 would always raise it.
6407 It turns out that in some environments, the limit is already over 1000 and
6408 that lowering it causes trouble. So now Exim takes care not to decrease it.
6410 40. When delivering a message, the value of $return_path is set to $sender_
6411 address at the start of routing (routers may change the value). By an
6412 oversight, this default was not being set up when an address was tested by
6413 -bt or -bv, which affected the outcome if any router or filter referred to
6416 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6417 log only when "message" or "log_message" are set. However, if one of the
6418 conditions was an address verification, or a call to a nested ACL, the
6419 messages generated by the underlying test were being passed through. This
6420 no longer happens. The underlying message is available in $acl_verify_
6421 message for both "message" and "log_message" expansions, so it can be
6422 passed through if needed.
6424 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6425 new expansion $bh_ to give the encoded byte string without charset
6426 translation. Translation happens only if iconv() is available; HAVE_ICONV
6427 indicates this at build time. HEADERS_CHARSET gives the charset to
6428 translate to; headers_charset can change it in the configuration, and
6429 "headers charset" can change it in an individual filter file.
6431 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6432 that creates RFC 2047 encoded "words" labels them as that charset instead
6433 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6434 expansion operator; (ii) when Exim creates a From: line for a local
6435 message; (iii) when a header line is rewritten to include a "phrase" part.
6437 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6438 buggy, causing it to skip the first lines of messages whose message ID
6439 ended in 'D'. This would not have bitten before Exim release 4.14, because
6440 message IDs were unlikely to end in 'D' before then. The effect was to have
6441 incorrect size information for certain domains.
6443 45. #include "config.h" was missing at the start of the crypt16.c module. This
6444 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6447 46. If there was a timeout during a "random" callout check, Exim treated it as
6448 a failure of the random address, and carried on sending RSET and the real
6449 address. If the delay was just some slowness somewhere, the response to the
6450 original RCPT would be taken as a response to RSET and so on, causing
6451 mayhem of various kinds.
6453 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6454 when I implemented it. It didn't allow for the fact that some option values
6455 may legitimatetly be negative (e.g. size_addition), and it didn't even do
6456 the right test for positive values.
6458 48. Domain names in DNS records are case-independent. Exim always looks them up
6459 in lower case. Some resolvers return domain names in exactly the case they
6460 appear in the zone file, that is, they may contain uppercase letters. Not
6461 all resolvers do this - some return always lower case. Exim was treating a
6462 change of case by a resolver as a change of domain, similar to a widening
6463 of a domain abbreviation. This triggered its re-routing code and so it was
6464 trying to route what was effectively the same domain again. This normally
6465 caused routing to fail (because the router wouldn't handle the domain
6466 twice). Now Exim checks for this case specially, and just changes the
6467 casing of the domain that it ultimately uses when it transmits the message
6470 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6473 50. If a filter generated a file delivery with a non-absolute name (possible if
6474 no home directory exists for the router), the forbid_file option was not
6477 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6478 the existing equality matching.
6480 52. Exim was using ints instead of ino_t variables in some places where it was
6481 dealing with inode numbers.
6483 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6484 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6485 called TMPDIR, and if it finds it is different, it changes its value.
6487 54. The smtp_printf() function is now made available to local_scan() so
6488 additional output lines can be written before returning. There is also an
6489 smtp_fflush() function to enable the detection of a dropped connection.
6490 The variables smtp_input and smtp_batched_input are exported to
6493 55. Changed the default runtime configuration: the message "Unknown user"
6494 has been removed from the ACL, and instead placed on the localuser router,
6495 using the cannot_route_message feature. This means that any verification
6496 failures that generate their own messages won't get overridden. Similarly,
6497 the "Unrouteable address" message that was in the ACL for unverifiable
6498 relay addresses has also been removed.
6500 56. Added hosts_avoid_esmtp to the smtp transport.
6502 57. The exicyclog script was not checking for the esoteric option
6503 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6504 will work only if exicyclog is run under the appropriate euid.
6506 58. Following a discussion on the list, the rules by which Exim recognises line
6507 endings on incoming messages have been changed. The -dropcr and drop_cr
6508 options are now no-ops, retained only for backwards compatibility. The
6509 following line terminators are recognized: LF CRLF CR. However, special
6510 processing applies to CR:
6512 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6513 nor a local message in the state where . is a terminator.
6515 (ii) If a bare CR is encountered in a header line, an extra space is added
6516 after the line terminator so as not to end the header. The reasoning
6517 behind this is that bare CRs in header lines are most likely either
6518 to be mistakes, or people trying to play silly games.
6520 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6521 was being incorrectly given as 18 bytes larger than it should have been.
6522 This is a VOB (very old bug).
6524 60. This may never have affected anything current, but just in case it has:
6525 When the local host is found other than at the start of a list of hosts,
6526 the local host, those with the same MX, and any that follow, are discarded.
6527 When the list in question was part of a longer list of hosts, the following
6528 hosts (not currently being processed) were also being discarded. This no
6529 longer happens. I'm not sure if this situation could ever has previously
6532 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6535 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6536 header. This is something that is recommended in a new Internet Draft, and
6537 is something that is documented as being done by Sendmail. There are two
6538 possible values. For messages generated by the autoreply transport, Exim
6541 Auto-Submitted: auto-replied
6543 whereas for all other generated messages (e.g. bounces) it adds
6545 Auto-Submitted: auto-generated
6547 63. The "personal" condition in filters now includes a test for the
6548 Auto-Submitted: header. If it contains the string "auto-" the message it
6549 not considered personal.
6551 64. Added rcpt_include_affixes as a generic transport option.
6553 65. Added queue_only_override (default true).
6555 66. Added the syslog_duplication option.
6557 67. If what should have been the first header line of a message consisted of
6558 a space followed by a colon, Exim was mis-interpreting it as a header line.
6559 It isn't of course - it is syntactically invalid and should therefore be
6560 treated as the start of the message body. The misbehaviour could have
6561 caused a number of strange effects, including loss of data in subsequent
6562 header lines, and spool format errors.
6564 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6565 client host had authenticated. This control can now be exercised by an ACL
6566 for more flexibility.
6568 69. By default, callouts do not happen when testing with -bh. There is now a
6569 variant, -bhc, which does actually run the callout code, including
6570 consulting and updating the callout cache.
6572 70. Added support for saslauthd authentication, courtesy of Alexander
6575 71. If statvfs() failed on the spool or log directories while checking their
6576 size for availability, Exim confusingly gave the error "space shortage".
6577 Furthermore, in debugging mode it crashed with a floating point exception.
6578 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6579 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6580 serious problem, Exim now writes to the main and panic logs when this
6581 happens, with details of the failure. It then refuses to accept the
6582 incoming message, giving the message "spool directory problem" or "log
6583 directory problem" with a 421 code for SMTP messages.
6585 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6586 0, 1, and 2 exist, because some OS complain for execs without them (see
6587 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6588 descriptors. However, the code omitted to check that the open succeeded,
6589 causing mysterious errors if for some reason the permissions on /dev/null
6590 got screwed. Now Exim writes a message to the main and panic logs, and
6591 bombs out if it can't open /dev/null.
6593 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6594 interact so that it is all more flexible. It is supposed to remain
6595 backwards compatible. Also added extra_local_interfaces.
6597 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6598 to bomb out with an assertion failure - to the client this appears as a
6599 connection drop. This problem occurs in the part of the code that was taken
6600 from the Samba project. Fortunately, the assertion is in a very simple
6601 function, so I have fixed this by reproducing the function inline in the
6602 one place where it is called, and arranging for authentication to fail
6603 instead of killing the process with assert().
6605 75. The SPA client code was not working when the server requested OEM rather
6606 than Unicode encoding.
6608 76. Added code to make require_files with a specific uid setting more usable in
6609 the case where statting the file as root fails - usually a non-root-mounted
6610 NFS file system. When this happens and the failure is EACCES, Exim now
6611 forks a subprocess and does the per-uid checking as the relevant uid.
6613 77. Added process_log_path.
6615 78. If log_file_path was not explicitly set, a setting of check_log_space or
6616 check_log_inodes was ignored.
6618 79. If a space check for the spool or log partitions fails, the incident is now
6619 logged. Of course, in the latter case the data may get lost...
6621 80. Added the %p formatting code to string_format() so that it can be used to
6622 print addresses in debug_print(). Adjusted all the address printing in the
6623 debugging in store.c to use %p rather than %d.
6625 81. There was a concern that a line of code in smtp_in.c could overflow a
6626 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6627 initially expressed, the concern was not well-founded, because trailing
6628 spaces are removed early. However, if the trailing spaces were followed by
6629 a NULL, they did not get removed, so the overflow was possible. Two fixes
6632 (a) I re-wrote the offending code in a cleaner fashion.
6633 (b) If an incoming SMTP command contains a NULL character, it is rejected
6636 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6637 runs initgroups(), so that if the Exim user is in any additional groups,
6638 they will be used during message reception.
6644 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob