1 Change log file for Exim from version 4.21
2 -------------------------------------------
6 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
7 than -2003 did; needs libidn2 in addition to linidn.
9 JH/02 The path option on a pipe transport is now expanded before use
14 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
15 supports it and a size is available (ie. the sending peer gave us one).
17 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
18 years of being deprecated). The replacements are the ACLs
19 acl_smtp_mime and acl_not_smtp_mime.
21 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
22 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
23 or even an in-clear connection were permitted. Now, if the host lookup
24 was dnssec and dane was requested then the host is only used if the
25 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
26 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
27 if one fails this test.
28 This means that a poorly-configured remote DNS will make it incommunicado;
29 but it protects against a DNS-interception attack on it.
31 JH/04 Bug 1810: make continued-use of an open smtp transport connection
32 non-noisy when a race steals the message being considered.
34 JH/05 If main configuration option tls_certificate is unset, generate a
35 self-signed certificate for inbound TLS connections.
37 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
38 in rewrites and routers.
40 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
41 and logged a warning sing 4.83; now they are a configuration file error.
43 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
44 (lacking @domain). Apply the same qualification processing as RCPT.
46 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
48 JH/10 Support ${sha256:} applied to a string (as well as the previous
51 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
52 a cutthrough deliver is pending, as we always want to make a connection.
53 This also avoids re-routing the message when later placing the cutthrough
54 connection after a verify cache hit.
55 Do not update it with the verify result either.
57 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
58 when routing results in more than one destination address.
60 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
61 signing (which inhibits the cutthrough capability). Previously only
62 the presence of an option was tested; now an expansion evaluating as
63 empty is permissible (obviously it should depend only on data available
64 when the cutthrough connection is made).
66 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
67 the relevant preceding SMTP command did not note the pipelining mode.
69 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
70 Previously they were not counted.
72 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
73 as one having no matching records. Previously we deferred the message
74 that needed the lookup.
76 JH/17 Fakereject: previously logged as a norml message arrival "<="; now
77 distinguished as "(=".
79 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
80 for missing MX records. Previously it only worked for missing A records.
82 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
84 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
85 after the data-go-ahead and data-ack. Patch from Jason Betts.
87 JH/21 Bug 1846: Send DMARC forensic reports for reject and quaratine results,
88 even for a "none" policy. Patch from Tony Meyer.
90 JH/22 Fix continued use of a connection for further deliveries. If a port was
91 specified by a router, it must also match for the delivery to be
94 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
95 When one of the recipients of a message was unsuitable for the connection
96 (has no matching addresses), we lost track of needing to mark it
97 deferred. As a result mail would be lost.
99 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
101 JH/25 Decoding ACL controls is now done using a binary search; the source code
102 takes up less space and should be simpler to maintain. Merge the ACL
103 condition decode tables also, with similar effect.
105 JH/26 Fix problem with one_time used on a redirect router which returned the
106 parent address unchanged. A retry would see the parent address marked as
107 delivered, so not attempt the (identical) child. As a result mail would
110 JH/27 Fix a possible security hole, wherein a process operating with the Exim
111 UID can gain a root shell. Credit to http://www.halfdog.net/ for
112 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
115 JH/28 Enable {spool,log} filesystem space and inode checks as default.
116 Main config options check_{log,spool}_{inodes,space} are now
117 100 inodes, 10MB unless set otherwise in the configuration.
119 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
120 Previously it only applied to the main-section connection policy
123 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
125 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
126 by me. Added RFC7919 DH primes as an alternative.
128 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
129 are not in the system include path.
131 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
132 GnuTLS, when a session startup failed (eg because the client disconnected)
133 Exim did stdio operations after fclose. This was exposed by a recent
134 change which nulled out the file handle after the fclose.
136 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
137 signed directly by the cert-signing cert, rather than an intermediate
138 OCSP-signing cert. This is the model used by LetsEncrypt.
140 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
145 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
146 and 3.4.4 - once the server is enabled to respond to an OCSP request
147 it does even when not requested, resulting in a stapling non-aware
148 client dropping the TLS connection.
150 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
151 support variable-length bit vectors. No functional change.
153 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
154 The I= interface field on outgoing lines is now after the H= remote
155 host field, same as incoming lines. There is a separate
156 outgoing_interface log selector which allows you to disable the
159 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
160 If not running log_selector +smtp_connection the mainlog would be held
161 open indefinitely after a "too many connections" event, including to a
162 deleted file after a log rotate. Leave the per net connection logging
163 leaving it open for efficiency as that will be quickly detected by the
164 check on the next write.
166 HS/01 Bug 1671: Fix post transport crash.
167 Processing the wait-<transport> messages could crash the delivery
168 process if the message IDs didn't exist for some reason. When
169 using 'split_spool_directory=yes' the construction of the spool
170 file name failed already, exposing the same netto behaviour.
172 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
173 mime_regex ACL conditions.
175 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
176 to DSN fail messages (bounces): remote IP, remote greeting, remote response
177 to HELO, local diagnostic string.
179 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
180 log line to debug. Even when configured with a tls authenticator many
181 client connections are expected to not authenticate in this way, so
182 an authenticate fail is not an error.
184 HS/02 Add the Exim version string to the process info. This way exiwhat
185 gives some more detail about the running daemon.
187 JH/06 Bug 1395: time-limit cacheing of DNS lookups, to the TTL value. This may
188 matter for fast-change records such as DNSBLs.
190 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
191 retry record, even if constant. There may be multiple transports with
192 different interface settings and the retry behaviour needs to be kept
195 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
197 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
199 JH/10 Bug 840: fix log_defer_output option of pipe transport
201 JH/11 Bug 830: use same host for all RCPTS of a message, even under
202 hosts_randomize. This matters a lot when combined with mua_wrapper.
204 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
205 ${quote_pgsql:<string>} operator.
207 JH/13 Bug 1708: avoid misaligned access in cached lookup.
209 JH/14 Change header file name for freeradius-client. Relevant if compiling
210 with Radius support; from the Gentoo tree and checked under Fedora.
212 JH/15 Bug 1712: Introduce $prdr_requested flag variable
214 JH/16 Bug 1714: Permit an empty string as expansion result for transport
215 option transport_filter, meaning no filtering.
217 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
219 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
220 defaults to "*" (all hosts). The variable is now available when not built
221 with TLS, default unset, mainly to enable keeping the testuite sane.
222 If a server certificate is not supplied (via tls_certificate) an error is
223 logged, and clients will find TLS connections fail on startup. Presumably
224 they will retry in-clear.
225 Packagers of Exim are strongly encouraged to create a server certificate
226 at installation time.
228 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
229 with the $config_file variable.
231 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
232 in transport context, after the attempt, and per-recipient. The latter type
233 is per host attempted. The event data is the error message, and the errno
234 information encodes the lookup type (A vs. MX) used for the (first) host,
235 and the trailing two digits of the smtp 4xx reponse.
237 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
238 to write to mainlog (or rejectlog, paniclog) in the window between file
239 creation and permissions/ownership being changed. Particularly affects
240 installations where exicyclog is run as root, rather than exim user;
241 result is that the running daemon panics and dies.
243 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
245 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
246 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
247 "pri" and "weight". Note that the previous implicit priority given by the
248 list order is no longer honoured.
250 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalisation
253 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
254 by defining SUPPORT_SOCKS.
256 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
257 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
258 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
259 variables are renamed to proxy_{local,external}_{address,port}.
261 JH/27 Move Internationalisation support from Experimental to mainline, enabled
262 for a build by defining SUPPORT_I18N
264 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
265 of the query string, and make ${quote_redis:} do that quoting.
267 JH/29 Move Events support from Experimental to mainline, enabled by default
268 and removable for a build by defining DISABLE_EVENT.
270 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
272 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
273 cached by the daemon.
275 JH/32 Move Redis support from Experimental to mainline, enabled for a build
276 by defining LOOKUP_REDIS. The libhiredis library is required.
278 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
279 keys are given for lookup.
281 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
282 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
283 only supported when built with TLS support. The PolarSSL SHA routines
284 are still used when the TLS library is too old for convenient support.
286 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
287 openssl_options), for security. OpenSSL forces this from version 1.1.0
288 server-side so match that on older versions.
290 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
291 allocation for $value could be released as the expansion processing
292 concluded, but leaving the global pointer active for it.
294 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
295 and to use the domains and local_parts ACL conditions.
297 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
298 incorrectly not doubled on cutthrough transmission, hence seen as a
299 body-termination at the receiving system - resulting in truncated mails.
300 Commonly the sender saw a TCP-level error, and retransmitted the message
301 via the normal store-and-forward channel. This could result in duplicates
302 received - but deduplicating mailstores were liable to retain only the
303 initial truncated version.
305 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
307 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
309 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
310 we're in there, support oversigning also; bug 1309.
312 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
314 HS/04 Add support for keep_environment and add_environment options.
316 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
317 either intentional arithmetic overflow during PRNG, or testing config-
320 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
321 delivery resulted in actual delivery. Cancel cutthrough before DATA
324 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
325 rejects a recipient: pass the reject to the originator.
327 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
328 Many were false-positives and ignorable, but it's worth fixing the
331 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
332 for the new environment-manipulation done at startup. Move the routines
333 from being local to tls.c to being global via the os.c file.
335 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
336 an extract embedded as result-arg for a map, the first arg for extract
337 is unavailable so we cannot tell if this is a numbered or keyed
338 extraction. Accept either.
344 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
347 JH/02 The smtp transport option "multi_domain" is now expanded.
349 JH/03 The smtp transport now requests PRDR by default, if the server offers
352 JH/04 Certificate name checking on server certificates, when exim is a client,
353 is now done by default. The transport option tls_verify_cert_hostnames
354 can be used to disable this per-host. The build option
355 EXPERIMENTAL_CERTNAMES is withdrawn.
357 JH/05 The value of the tls_verify_certificates smtp transport and main options
358 default to the word "system" to access the system default CA bundle.
359 For GnuTLS, only version 3.0.20 or later.
361 JH/06 Verification of the server certificate for a TLS connection is now tried
362 (but not required) by default. The verification status is now logged by
363 default, for both outbound TLS and client-certificate supplying inbound
366 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
369 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
370 Status Notification (bounce) messages are now MIME format per RFC 3464.
371 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
372 under the control of the dsn_advertise_hosts option, and routers may
373 have a dsn_lasthop option.
375 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
376 default, modifiable by a malware= option. The list separator for
377 the options can now be changed in the usual way. Bug 68.
379 JH/10 The smtp_receive_timeout main option is now expanded before use.
381 JH/11 The incoming_interface log option now also enables logging of the
382 local interface on delivery outgoing connections.
384 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
385 if the interface and destination host and port all match.
387 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
390 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
391 Patch from Andrew Lewis.
393 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
394 now supports optional time-restrictions, weighting, and priority
395 modifiers per server. Patch originally by <rommer@active.by>.
397 JH/16 The spamd_address main option now supports a mixed list of local
398 and remote servers. Remote servers can be IPv6 addresses, and
399 specify a port-range.
401 JH/17 Bug 68: The spamd_address main option now supports an optional
402 timeout value per server.
404 JH/18 Bug 1581: Router and transport options headers_add/remove can
405 now have the list separator specified.
407 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
410 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
413 JH/21 Support for the A6 type of dns record is withdrawn.
415 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
416 rather than the verbs used.
418 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
419 from 255 to 1024 chars.
421 JH/24 Verification callouts now attempt to use TLS by default.
423 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
424 are generic router options now. The defaults didn't change.
426 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
427 Original patch from Alexander Shikoff, worked over by JH.
429 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
430 files if ZCAT_COMMAND is not executable.
432 JH/26 Bug 1539: Add timout/retry options on dnsdb lookups.
434 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
436 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
437 Normally benign, it bites when the pair was led to by a CNAME;
438 modern usage is to not canoicalize the domain to a CNAME target
439 (and we were inconsistent anyway for A-only vs AAAA+A).
441 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
443 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
444 when evaluating $sender_host_dnssec.
446 JH/31 Check the HELO verification lookup for DNSSEC, adding new
447 $sender_helo_dnssec variable.
449 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
451 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
453 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
455 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
456 documented as working, but never had. Support all but $spam_report.
458 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
459 added for tls authenticator.
461 HS/03 Add perl_taintmode main config option
466 TL/01 When running the test suite, the README says that variables such as
467 no_msglog_check are global and can be placed anywhere in a specific
468 test's script, however it was observed that placement needed to be near
469 the beginning for it to behave that way. Changed the runtest perl
470 script to read through the entire script once to detect and set these
471 variables, reset to the beginning of the script, and then run through
472 the script parsing/test process like normal.
474 TL/02 The BSD's have an arc4random API. One of the functions to induce
475 adding randomness was arc4random_stir(), but it has been removed in
476 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
477 function when detected.
479 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
480 cause callback expansion.
482 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
483 syntax errors in an expansion can be treated as a string instead of
484 logging or causing an error, due to the internal use of bool_lax
485 instead of bool when processing it.
487 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
488 server certificates when making smtp deliveries.
490 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
492 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
494 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
496 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
497 Merged patch from Sebastian Wiedenroth.
499 JH/05 Fix results-pipe from transport process. Several recipients, combined
500 with certificate use, exposed issues where response data items split
501 over buffer boundaries were not parsed properly. This eventually
502 resulted in duplicates being sent. This issue only became common enough
503 to notice due to the introduction of conection certificate information,
504 the item size being so much larger. Found and fixed by Wolfgang Breyha.
506 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
507 size buffer was used, resulting in syntax errors when an expansion
510 JH/07 Add support for directories of certificates when compiled with a GnuTLS
511 version 3.3.6 or later.
513 JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef
514 is EXPERIMENTAL_EVENT, the main-configuration and transport options
515 both become "event_action", the variables become $event_name, $event_data
516 and $event_defer_errno. There is a new variable $verify_mode, usable in
517 routers, transports and related events. The tls:cert event is now also
518 raised for inbound connections, if the main configuration event_action
521 TL/06 In test suite, disable OCSP for old versions of openssl which contained
522 early OCSP support, but no stapling (appears to be less than 1.0.0).
524 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
525 server certificate names available under the smtp transport option
526 "tls_verify_cert_hostname" now do not permit multi-component wildcard
529 JH/10 Time-related extraction expansions from certificates now use the main
530 option "timezone" setting for output formatting, and are consistent
531 between OpenSSL and GnuTLS compilations. Bug 1541.
533 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
534 encoded parameter in the incoming message. Bug 1558.
536 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
537 include certificate info, eximon was claiming there were spoolfile
540 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
542 JH/14 Log delivery-related information more consistently, using the sequence
543 "H=<name> [<ip>]" wherever possible.
545 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
546 are problematic for Debian distribution, omit them from the release
549 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
551 JH/16 Fix string representation of time values on 64bit time_t anchitectures.
554 JH/17 Fix a null-indirection in certextract expansions when a nondefault
555 output list separator was used.
560 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
561 checkers that were complaining about end of non-void function with no
564 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
565 This was a regression intruduced in 4.83 by another bugfix.
567 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
569 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
570 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
576 TF/01 Correctly close the server side of TLS when forking for delivery.
578 When a message was received over SMTP with TLS, Exim failed to clear up
579 the incoming connection properly after forking off the child process to
580 deliver the message. In some situations the subsequent outgoing
581 delivery connection happened to have the same fd number as the incoming
582 connection previously had. Exim would try to use TLS and fail, logging
583 a "Bad file descriptor" error.
585 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
586 utilities have not been installed.
588 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
589 temporary space as the ACL may create new global variables.
591 TL/01 LDAP support uses per connection or global context settings, depending
592 upon the detected version of the libraries at build time.
594 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
595 to extract and use the src ip:port in logging and expansions as if it
596 were a direct connection from the outside internet. PPv2 support was
597 updated based on HAProxy spec change in May 2014.
599 JH/02 Add ${listextract {number}{list}{success}{fail}}.
601 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
602 Properly escape header and check for NULL return.
604 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
607 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
609 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
610 characters in header names, implemented as a verify condition.
611 Contributed by Michael Fischer v. Mollard.
613 TL/05 Rename SPF condition results err_perm and err_temp to standardized
614 results permerror and temperror. Previous values are deprecated but
615 still accepted. In a future release, err_perm and err_temp will be
616 completely removed, which will be a backward incompatibility if the
617 ACL tests for either of these two old results. Patch contributed by
618 user bes-internal on the mailing list.
620 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
622 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
623 selectors, in both main and reject logs.
625 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
628 JH/07 Add malware type "sock" for talking to simple daemon.
630 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
632 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
633 routers/transports under cutthrough routing.
635 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
636 numbers. Touch up "bool" conditional to keep the same definition.
638 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
640 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
642 JH/12 Expand items in router/transport headers_add or headers_remove lists
643 individually rather than the list as a whole. Bug 1452.
645 Required for reasonable handling of multiple headers_ options when
646 they may be empty; requires that headers_remove items with embedded
647 colons must have them doubled (or the list-separator changed).
649 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
650 view the policy declared in the DMARC record. Currently, $dmarc_status
651 is a combined value of both the record presence and the result of the
654 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
656 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
657 dnslookup router and the smtp transport (applying to the forward
660 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
661 of ldap servers used for a specific lookup. Patch provided by Heiko
664 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
665 New variable $lookup_dnssec_authenticated for observability.
667 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
668 Patch submitted by Lars Timman.
670 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
672 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
673 Requires trusted mode and valid format message id, aborts otherwise.
674 Patch contributed by Heiko Schlichting.
676 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
677 certextract with support for various fields. Bug 1358.
679 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
680 is requested by default, modifiable by smtp transport option
683 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
684 operate on certificate variables to give certificate fingerprints
685 Also new ${sha256:cert_variable}.
687 JH/23 The PRDR feature is moved from being Experimental into the mainline.
689 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
690 Christian Aistleitner.
692 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
694 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
695 file. Patch from Wolfgang Breyha.
697 JH/25 Expand the coverage of the delivery $host and $host_address to
698 client authenticators run in verify callout. Bug 1476.
700 JH/26 Port service names are now accepted for tls_on_connect_ports, to
701 align with daemon_smtp_ports. Bug 72.
703 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
704 support and error reporting did not work properly.
706 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
707 and is readable. Patch from Andrew Colin Kissa.
709 TL/14 Enhance documentation of ${run expansion and how it parses the
710 commandline after expansion, particularly in the case when an
711 unquoted variable expansion results in an empty value.
713 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
715 PP/02 Fix internal collision of T_APL on systems which support RFC3123
716 by renaming away from it. Addresses GH issue 15, reported by
719 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
721 TL/15 SECURITY: prevent double expansion in math comparison functions
722 (can expand unsanitized data). Not remotely exploitable.
729 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
731 PP/02 Make -n do something, by making it not do something.
732 When combined with -bP, the name of an option is not output.
734 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
737 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
738 $sender_host_name and config options to manage this, and basic check
741 PP/05 DSCP support for outbound connections and control modifier for inbound.
743 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
744 (Only plugin which currently uses this is kerberos4, which nobody should
745 be using, but we should make it available and other future plugins might
746 conceivably use it, even though it would break NAT; stuff *should* be
747 using channel bindings instead).
749 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
750 name; added for Sendmail compatibility; requires admin caller.
751 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
752 just ignore it); requires trusted caller.
753 Also parse but ignore: -Ac -Am -X<logfile>
756 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
758 TL/02 Add +smtp_confirmation as a default logging option.
760 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
761 Patch by Magnus Holmgren from 2007-02-20.
763 TL/04 Bugzilla 1281 - Spec typo.
764 Bugzilla 1283 - Spec typo.
765 Bugzilla 1290 - Spec grammar fixes.
767 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
769 TL/06 Add Experimental DMARC support using libopendmarc libraries.
771 TL/07 Fix an out of order global option causing a segfault. Reported to dev
772 mailing list by by Dmitry Isaikin.
774 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
776 JH/02 Support "G" suffix to numbers in ${if comparisons.
778 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
780 NM/01 Bugzilla 1197 - Spec typo
781 Bugzilla 1196 - Spec examples corrections
783 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
785 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
786 gnutls_enable_pkcs11, but renamed to more accurately indicate its
789 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
790 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
792 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
793 "acl {{name}{arg}...}", and optional args on acl condition
796 JH/05 Permit multiple router/transport headers_add/remove lines.
798 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
800 JH/07 Avoid using a waiting database for a single-message-only transport.
801 Performance patch from Paul Fisher. Bugzilla 1262.
803 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
806 JH/09 Add $headers_added variable, with content from use of ACL modifier
807 add_header (but not yet added to the message). Bugzilla 199.
809 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
810 Pulled from Bugzilla 817 by Wolfgang Breyha.
812 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
814 (nb: this is the same fix as in Exim 4.80.1)
816 JH/11 Add A= logging on delivery lines, and a client_set_id option on
819 JH/12 Add optional authenticated_sender logging to A= and a log_selector
822 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
824 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
825 advertise SMTP AUTH mechanism to us, instead of a generic
826 protocol violation error. Also, make Exim more robust to bad
827 data from the Dovecot auth socket.
829 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
831 When a queue runner is handling a message, Exim first routes the
832 recipient addresses, during which it prunes them based on the retry
833 hints database. After that it attempts to deliver the message to
834 any remaining recipients. It then updates the hints database using
837 So if a recipient address works intermittently, it can get repeatedly
838 deferred at routing time. The retry hints record remains fresh so the
839 address never reaches the final cutoff time.
841 This is a fairly common occurrence when a user is bumping up against
842 their storage quota. Exim had some logic in its local delivery code
843 to deal with this. However it did not apply to per-recipient defers
844 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
846 This change adds a proper retry rule check during routing so that the
847 final cutoff time is checked against the message's age. We only do
848 this check if there is an address retry record and there is not a
849 domain retry record; this implies that previous attempts to handle
850 the address had the retry_use_local_parts option turned on. We use
851 this as an approximation for the destination being like a local
852 delivery, as in LMTP.
854 I suspect this new check makes the old local delivery cutoff check
855 redundant, but I have not verified this so I left the code in place.
857 TF/02 Correct gecos expansion when From: is a prefix of the username.
859 Test 0254 submits a message to Exim with the header
863 When I ran the test suite under the user fanf2, Exim expanded
864 the header to contain my full name, whereas it should have added
865 a Resent-Sender: header. It erroneously treats any prefix of the
866 username as equal to the username.
868 This change corrects that bug.
870 GF/01 DCC debug and logging tidyup
871 Error conditions log to paniclog rather than rejectlog.
872 Debug lines prefixed by "DCC: " to remove any ambiguity.
874 TF/03 Avoid unnecessary rebuilds of lookup-related code.
876 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
877 Bug spotted by Jeremy Harris; was flawed since initial commit.
878 Would have resulted in OCSP responses post-SNI triggering an Exim
879 NULL dereference and crash.
881 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
883 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
884 Bug detection, analysis and fix by Samuel Thibault.
885 Bugzilla 1331, Debian bug #698092.
887 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
889 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
890 Server implementation by Todd Lyons, client by JH.
891 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
892 config variable "prdr_enable" controls whether the server
893 advertises the facility. If the client requests PRDR a new
894 acl_data_smtp_prdr ACL is called once for each recipient, after
895 the body content is received and before the acl_smtp_data ACL.
896 The client is controlled by bolth of: a hosts_try_prdr option
897 on the smtp transport, and the server advertisement.
898 Default client logging of deliveries and rejections involving
899 PRDR are flagged with the string "PRDR".
901 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
902 fclose(). Diagnosis by Todd Lyons.
904 PP/17 Update configure.default to handle IPv6 localhost better.
905 Patch by Alain Williams (plus minor tweaks).
908 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
909 This is now consistent with GnuTLS, and is now documented: the
910 previous undocumented portable approach to treating the option as
911 unset was to force an expansion failure. That still works, and
912 an empty string is now equivalent.
914 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
915 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
916 not performing validation itself.
918 PP/20 Added force_command boolean option to pipe transport.
919 Patch from Nick Koston, of cPanel Inc.
921 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
924 TF/04 Added udpsend ACL modifer and hexquote expansion operator
926 PP/21 Fix eximon continuous updating with timestamped log-files.
927 Broken in a format-string cleanup in 4.80, missed when I repaired the
928 other false fix of the same issue.
929 Report and fix from Heiko Schlichting.
932 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
933 Report from Prashanth Katuri.
935 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
936 It's SecureTransport, so affects any MacOS clients which use the
937 system-integrated TLS libraries, including email clients.
939 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
940 using a MIME ACL for non-SMTP local injection.
941 Report and assistance in diagnosis by Warren Baker.
943 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
945 JH/16 Fix comparisons for 64b. Bugzilla 1385.
947 TL/09 Add expansion variable $authenticated_fail_id to keep track of
948 last id that failed so it may be referenced in subsequent ACL's.
950 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
953 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
954 ldap library initialization, allowing self-signed CA's to be
955 used. Also properly sets require_cert option later in code by
956 using NULL (global ldap config) instead of ldap handle (per
957 session). Bug diagnosis and testing by alxgomz.
959 TL/12 Enhanced documentation in the ratelimit.pl script provided in
960 the src/util/ subdirectory.
962 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
963 renamed to Transport Post Delivery Action by Jeremy Harris, as
966 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
967 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
968 redis_servers = needs to be configured which will be used by the redis
969 lookup. Patch from Warren Baker, of The Packet Hub.
971 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
973 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
974 hostname or reverse DNS when processing a host list. Used suggestions
975 from multiple comments on this bug.
977 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
979 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
980 Missed a few lines, added it to make the runtest require no keyboard
983 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
984 contains upper case chars. Make router use caseful_local_part.
986 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
987 support when GnuTLS has been built with p11-kit.
993 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
995 This, or similar/improved, will also be change PP/11 of 4.82.
1001 PP/01 Handle short writes when writing local log-files.
1002 In practice, only affects FreeBSD (8 onwards).
1003 Bugzilla 1053, with thanks to Dmitry Isaikin.
1005 NM/01 Bugzilla 949 - Documentation tweak
1007 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1010 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1012 PP/02 Implemented gsasl authenticator.
1014 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1016 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1017 `pkg-config foo` for cflags/libs.
1019 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1020 with rest of GSASL and with heimdal_gssapi.
1022 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1023 `pkg-config foo` for cflags/libs for the TLS implementation.
1025 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1026 properties get this fed in as external SSF. A number of robustness
1027 and debugging improvements to the cyrus_sasl authenticator.
1029 PP/08 cyrus_sasl server now expands the server_realm option.
1031 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1032 Patch by Jeremy Harris.
1034 PP/10 Added dbmjz lookup type.
1036 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1038 PP/12 MAIL args handles TAB as well as SP, for better interop with
1039 non-compliant senders.
1040 Analysis and variant patch by Todd Lyons.
1042 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1043 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1044 Patch from Dirk Mueller <dmueller@suse.com>
1046 PP/13 tls_peerdn now print-escaped for spool files.
1047 Observed some $tls_peerdn in wild which contained \n, which resulted
1048 in spool file corruption.
1050 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1051 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1052 or write after TLS renegotiation, which otherwise led to messages
1055 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1056 as a tracking header (ie: a signed header comes before the signature).
1057 Patch from Wolfgang Breyha.
1059 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1060 comma-sep list; embedded commas doubled.
1062 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1064 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1066 Report and patch from Dmitry Banschikov.
1068 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
1069 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1070 failures. We appear to now support TLS1.1+ with Exim.
1072 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1073 lets Exim select keys and certificates based upon TLS SNI from client.
1074 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1075 before an outbound SMTP session. New log_selector, +tls_sni.
1077 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1078 NULL dereference. Report and patch from Alun Jones.
1080 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1081 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1082 Not seeing resolver debug output on NetBSD, but suspect this is a
1083 resolver implementation change.
1085 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1086 Left warnings. Added "eximon gdb" invocation mode.
1088 PP/21 Defaulting "accept_8bitmime" to true, not false.
1090 PP/22 Added -bw for inetd wait mode support.
1092 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1093 locate the relevant includes and libraries. Made this the default.
1095 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1096 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1098 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1099 This may cause build issues on older platforms.
1101 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1102 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1103 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1104 Added SNI support via GnuTLS too.
1105 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1107 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1109 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1110 Applied second patch from Janne, implementing suggestion to default
1111 multiple-strings-in-record handling to match SPF spec.
1113 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1115 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1116 read-only, out of scope).
1117 Patch from Wolfgang Breyha, report from Stuart Northfield.
1119 PP/29 Fix three issues highlighted by clang analyser static analysis.
1120 Only crash-plausible issue would require the Cambridge-specific
1121 iplookup router and a misconfiguration.
1122 Report from Marcin Mirosław.
1124 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1126 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1127 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1128 As part of this, removing so much warning spew let me fix some minor
1129 real issues in debug logging.
1131 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1132 assignment on my part. Fixed.
1134 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1135 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1136 Janne Snabb (who went above and beyond: thank you).
1138 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1139 string otherwise requires a connection and a bunch more work and it's
1140 relatively easy to get wrong. Should also expose TLS library linkage
1143 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1144 64-bit ${eval} (JH/03).
1146 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1147 GNU libc to support some of the 64-bit stuff, should not lead to
1148 conflicts. Defined before os.h is pulled in, so if a given platform
1149 needs to override this, it can.
1151 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1152 protection layer was required, which is not implemented.
1153 Bugzilla 1254, patch from Wolfgang Breyha.
1155 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1156 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1157 tls_dhparam take prime identifiers. Also unbreak combination of
1158 OpenSSL+DH_params+TLSSNI.
1160 PP/39 Disable SSLv2 by default in OpenSSL support.
1166 PP/01 Solaris build fix for Oracle's LDAP libraries.
1167 Bugzilla 1109, patch from Stephen Usher.
1169 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1171 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1174 TF/02 Fix a couple more cases where we did not log the error message
1175 when unlink() failed. See also change 4.74-TF/03.
1177 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1178 lock up or crash if it happened to be inside a call to libc when it
1179 got a SIGUSR1 from exiwhat.
1181 The SIGUSR1 handler appends the current process status to the process
1182 log which is later printed by exiwhat. It used to use the general
1183 purpose logging code to do this, but several functions it calls are
1184 not safe for signals.
1186 The new output code in the SIGUSR1 handler is specific to the process
1187 log, and simple enough that it's easy to inspect for signal safety.
1188 Removing some special cases also simplifies the general logging code.
1189 Removing the spurious timestamps from the process log simplifies
1192 TF/04 Improved ratelimit ACL condition.
1194 The /noupdate option has been deprecated in favour of /readonly which
1195 has clearer semantics. The /leaky, /strict, and /readonly update modes
1196 are mutually exclusive. The update mode is no longer included in the
1197 database key; it just determines when the database is updated. (This
1198 means that when you upgrde Exim will forget old rate measurements.)
1200 Exim now checks that the per_* options are used with an update mode that
1201 makes sense for the current ACL. For example, when Exim is processing a
1202 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1203 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1204 must specify per_mail/readonly. If you omit the update mode it defaults to
1205 /leaky where that makes sense (as before) or /readonly where required.
1207 The /noupdate option is now undocumented but still supported for
1208 backwards compatibility. It is equivalent to /readonly except that in
1209 ACLs where /readonly is required you may specify /leaky/noupdate or
1210 /strict/noupdate which are treated the same as /readonly.
1212 A useful new feature is the /count= option. This is a generalization
1213 of the per_byte option, so that you can measure the throughput of other
1214 aggregate values. For example, the per_byte option is now equivalent
1215 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1217 The per_rcpt option has been generalized using the /count= mechanism
1218 (though it's more complicated than the per_byte equivalence). When it is
1219 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1220 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1221 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1222 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1223 Note that using per_rcpt with a non-readonly update mode in more than
1224 one ACL will cause the recipients to be double-counted. (The per_mail
1225 and per_byte options don't have this problem.)
1227 The handling of very low rates has changed slightly. If the computed rate
1228 is less than the event's count (usually one) then this event is the first
1229 after a long gap. In this case the rate is set to the same as this event's
1230 count, so that the first message of a spam run is counted properly.
1232 The major new feature is a mechanism for counting the rate of unique
1233 events. The new per_addr option counts the number of different
1234 recipients that someone has sent messages to in the last time period. It
1235 behaves like per_rcpt if all the recipient addresses are different, but
1236 duplicate recipient addresses do not increase the measured rate. Like
1237 the /count= option this is a general mechanism, so the per_addr option
1238 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1239 example, measure the rate that a client uses different sender addresses
1240 with the options per_mail/unique=$sender_address. There are further
1241 details in the main documentation.
1243 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1245 TF/06 Removed a few PCRE remnants.
1247 TF/07 Automatically extract Exim's version number from tags in the git
1248 repository when doing development or release builds.
1250 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1251 Bugzilla 879. Patch from Paul Fisher.
1253 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1254 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1257 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1259 PP/05 Variable $av_failed, true if the AV scanner deferred.
1260 Bugzilla 1078. Patch from John Horne.
1262 PP/06 Stop make process more reliably on build failure.
1263 Bugzilla 1087. Patch from Heiko Schlittermann.
1265 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1266 Bugzilla 1089. Patch from Heiko Schlittermann.
1268 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1269 Bugzilla 1131. Patch from Holger Weiß.
1271 PP/09 Handle IPv6 addresses with SPF.
1272 Bugzilla 860. Patch from Wolfgang Breyha.
1274 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1276 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1279 PP/11 match_* no longer expand right-hand-side by default.
1280 New compile-time build option, EXPAND_LISTMATCH_RHS.
1281 New expansion conditions, "inlist", "inlisti".
1283 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1285 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1287 PP/14 fix log_write() format string regression from TF/03.
1288 Bugzilla 1152. Patch from Dmitry Isaikin.
1294 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1296 PP/02 Harmonised TLS library version reporting; only show if debugging.
1297 Layout now matches that introduced for other libraries in 4.74 PP/03.
1299 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1301 PP/04 New "dns_use_edns0" global option.
1303 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1306 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1307 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1309 TK/01 Updated PolarSSL code to 0.14.2.
1310 Bugzilla 1097. Patch from Andreas Metzler.
1312 PP/07 Catch divide-by-zero in ${eval:...}.
1313 Fixes bugzilla 1102.
1315 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1318 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1319 format-string attack -- SECURITY: remote arbitrary code execution.
1321 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1322 time unintentionally subject to list matching rules, letting the header
1323 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1324 arbitrary string expansion). This allowed for information disclosure.
1326 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1327 INT_MIN/-1 -- value coerced to INT_MAX.
1333 NM/01 Workround for PCRE version dependency in version reporting
1336 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1337 This fixes portability to compilers other than gcc, notably
1338 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1340 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1341 makefiles for portability to HP-UX and POSIX correctness.
1343 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1344 Also via indented variable definition in the Makefile.
1345 (Debugging by Oliver Heesakkers).
1347 PP/02 Restore caching of spamd results with expanded spamd_address.
1348 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1350 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1351 Improves build reliability. Fix from: Frank Elsner
1353 NM/02 Fix wide character breakage in the rfc2047 coding
1354 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1356 NM/03 Allow underscore in dnslist lookups
1357 Fixes bug 1026. Patch from Graeme Fowler
1359 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1360 Code patches from Adam Ciarcinski of NetBSD.
1362 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1365 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1366 is logged, to avoid truncation. Patch from John Horne.
1368 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1369 Patch from Jakob Hirsch.
1371 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1372 SQL string expansion failure details.
1373 Patch from Andrey Oktyabrski.
1375 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1376 Patch from Simon Arlott.
1378 PP/09 New lookups functionality failed to compile on old gcc which rejects
1379 extern declarations in function scope.
1380 Patch from Oliver Fleischmann
1382 PP/10 Use sig_atomic_t for flags set from signal handlers.
1383 Check getgroups() return and improve debugging.
1384 Fixed developed for diagnosis in bug 927 (which turned out to be
1387 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1388 Patch from Mark Zealey.
1390 PP/12 Bugzilla 1056: Improved spamd server selection.
1391 Patch from Mark Zealey.
1393 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1394 Based on patch from Heiko Schlittermann.
1396 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1397 Patch from Uwe Doering, sign-off by Michael Haardt.
1399 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1400 variable declaration deep within a block. Bug and patch from
1403 PP/15 lookups-Makefile IRIX compatibilty coercion.
1405 PP/16 Make DISABLE_DKIM build knob functional.
1407 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1408 Patch by Simon Arlott
1410 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1411 variable argument macros. Our copy now differs from upstream.
1417 TF/01 Failure to get a lock on a hints database can have serious
1418 consequences so log it to the panic log.
1420 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1421 controlled using the smtp_confirmation log selector.
1423 TF/03 Include the error message when we fail to unlink a spool file.
1425 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1426 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1427 for maintaining out-of-tree patches for some time.
1429 PP/01 Bugzilla 139: Documentation and portability issues.
1430 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1431 Handle per-OS dynamic-module compilation flags.
1433 PP/02 Let /dev/null have normal permissions.
1434 The 4.73 fixes were a little too stringent and complained about the
1435 permissions on /dev/null. Exempt it from some checks.
1436 Reported by Andreas M. Kirchwitz.
1438 PP/03 Report version information for many libraries, including
1439 Exim version information for dynamically loaded libraries. Created
1440 version.h, now support a version extension string for distributors
1441 who patch heavily. Dynamic module ABI change.
1443 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1444 privilege escalation vulnerability whereby the Exim run-time user
1445 can cause root to append content of the attacker's choosing to
1448 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1451 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1452 If dropping privileges for untrusted macros, we disabled normal logging
1453 on the basis that it would fail; for the Exim run-time user, this is not
1454 the case, and it resulted in successful deliveries going unlogged.
1455 Fixed. Reported by Andreas Metzler.
1461 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1462 only prepend for the Resent-* case. Fixes regression introduced in
1463 Exim 4.70 by NM/22 for Bugzilla 607.
1465 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1466 increasing numbers of administrators be bitten by this.
1468 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1470 PP/03 Bugzilla 994: added openssl_options main configuration option.
1472 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1474 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1476 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1478 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1479 without a peer certificate, leading to a segfault because of an
1480 assumption that peers always have certificates. Be a little more
1481 paranoid. Problem reported by Martin Tscholak.
1483 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1484 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1485 NB: ClamAV planning to remove STREAM in "middle of 2010".
1486 CL also introduces -bmalware, various -d+acl logging additions and
1487 more caution in buffer sizes.
1489 PP/09 Implemented reverse_ip expansion operator.
1491 PP/10 Bugzilla 937: provide a "debug" ACL control.
1493 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1495 PP/12 Bugzilla 973: Implement --version.
1497 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1499 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1501 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1503 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1504 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1505 ignore trailing whitespace.
1507 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1509 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1512 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1513 Notification from Dr Andrew Aitchison.
1515 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1516 ExtendedDetectionInfo response format.
1517 Notification from John Horne.
1519 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1522 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1523 XSL and documented dependency on system catalogs, with examples of how
1526 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1529 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1530 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1531 configuration file which is writeable by the Exim user or group.
1533 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1534 of configuration files to cover files specified with the -C option if
1535 they are going to be used with root privileges, not just the default
1538 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1539 option (effectively making it always true).
1541 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1542 files to be used while preserving root privileges.
1544 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1545 that rogue child processes cannot use them.
1547 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1548 run-time user, instead of root.
1550 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1551 Exim run-time user without dropping privileges.
1553 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1554 result string, instead of calling string_vformat() twice with the same
1557 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1558 for other users. Others should always drop root privileges if they use
1559 -C on the command line, even for a whitelisted configure file.
1561 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1563 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1569 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1570 $data_path, and $header_path variables; fixed documentation bugs and
1573 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1574 exipick to access non-standard spools, including the "frozen" queue
1577 NM/01 Bugzilla 965: Support mysql stored procedures.
1578 Patch from Alain Williams
1580 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1582 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1583 Patch from Andreas Metzler
1585 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1586 Patch from Kirill Miazine
1588 NM/05 Bugzilla 671: Added umask to procmail example.
1590 JJ/03 installed exipick 20100323.0, fixing doc bug
1592 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1593 directory. Notification and patch from Dan Rosenberg.
1595 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1597 TK/02 Improve log output when DKIM signing operation fails.
1599 MH/01 Treat the transport option dkim_domain as a colon separated
1600 list, not as a single string, and sign the message with each element,
1601 omitting multiple occurences of the same signer.
1603 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1604 Bugzilla 985, 986. Patch by Simon Arlott
1606 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1607 Patch by Simon Arlott
1609 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1610 MBX locking. Notification from Dan Rosenberg.
1616 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1618 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1620 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1622 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1624 NM/04 Bugzilla 915: Flag broken perl installation during build.
1630 TK/01 Added patch by Johannes Berg that expands the main option
1631 "spamd_address" if it starts with a dollar sign.
1633 TK/02 Write list of recipients to X-Envelope-Sender header when building
1634 the mbox-format spool file for content scanning (suggested by Jakob
1637 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1638 (http://www.dcc-servers.net/) support via dccifd. Activated by
1639 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1641 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1642 by Mark Daniel Reidel <mr@df.eu>.
1644 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1645 When building exim an external PCRE library is now needed -
1646 PCRE is a system library on the majority of modern systems.
1647 See entry on PCRE_LIBS in EDITME file.
1649 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1650 conversation. Added nologin parameter to request.
1651 Patch contributed by Kirill Miazine.
1653 TF/01 Do not log submission mode rewrites if they do not change the address.
1655 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1657 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1658 log files in place. Contributed by Roberto Lima.
1660 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1662 TF/03 Bugzilla 615: When checking the local_parts router precondition
1663 after a local_part_suffix or local_part_prefix option, Exim now
1664 does not use the address's named list lookup cache, since this
1665 contains cached lookups for the whole local part.
1667 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1668 Robert Millan. Documentation is in experimental-spec.txt.
1670 TF/04 Bugzilla 668: Fix parallel build (make -j).
1672 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1674 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1675 Patch provided by Jan Srzednicki.
1677 TF/05 Leading white space used to be stripped from $spam_report which
1678 wrecked the formatting. Now it is preserved.
1680 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1681 that they are available at delivery time.
1683 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1685 TF/08 TLS error reporting now respects the incoming_interface and
1686 incoming_port log selectors.
1688 TF/09 Produce a more useful error message if an SMTP transport's hosts
1689 setting expands to an empty string.
1691 NM/06 Bugzilla 744: EXPN did not work under TLS.
1692 Patch provided by Phil Pennock.
1694 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1695 Patch provided by Richard Godbee.
1697 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1698 acl_smtp_notquit, added index entry.
1700 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1701 Patch provided by Eugene Bujak.
1703 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1704 accept(). Patch provided by Maxim Dounin.
1706 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1707 Patch provided by Phil Pennock.
1709 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1711 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1712 Patch provided by Brad "anomie" Jorsch.
1714 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1715 Patch provided by Dean Brooks.
1717 TK/05 Add native DKIM support (does not depend on external libraries).
1719 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1720 Patch provided by Graeme Fowler.
1722 NM/16 Bugzilla 851: Documentation example syntax fix.
1724 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1726 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1729 NM/19 Bugzilla 745: TLS version reporting.
1730 Patch provided by Phil Pennock.
1732 NM/20 Bugzilla 167: bool: condition support.
1733 Patch provided by Phil Pennock.
1735 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1736 clients. Patch provided by Phil Pennock.
1738 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1739 Patch provided by Brad "anomie" Jorsch.
1741 NM/23 Bugzilla 687: Fix misparses in eximstats.
1742 Patch provided by Heiko Schlittermann.
1744 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1745 Patch provided by Heiko Schlittermann.
1747 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1748 plus update to original patch.
1750 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1752 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1753 Patch provided by David Brownlee.
1755 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1757 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1759 NM/30 Bugzilla 888: TLS documentation bugfixes.
1761 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1763 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1764 Unlike the original bugzilla I have changed all shell scripts in src tree.
1766 NM/33 Bugzilla 898: Transport filter timeout fix.
1767 Patch by Todd Rinaldo.
1769 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1770 Patch by Serge Demonchaux.
1772 NM/35 Bugzilla 39: Base64 decode bug fixes.
1773 Patch by Jakob Hirsch.
1775 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1777 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1779 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1781 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1787 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1788 ALT-N's libdkim that I have put here:
1789 http://duncanthrax.net/exim-experimental/
1791 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1792 were called 'true' and it seems that C99 defines that as a reserved
1793 keyword to be used with 'bool' variable types. That means you could
1794 not include C99-style headers which use bools without triggering
1795 build errors in sieve.c.
1797 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1798 as mailq or other aliases. Changed the --help handling significantly
1799 to do whats expected. exim_usage() emits usage/help information.
1801 SC/01 Added the -bylocaldomain option to eximstats.
1803 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1805 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1807 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1813 PH/01 Another patch from the Sieve maintainer.
1815 PH/02 When an IPv6 address is converted to a string for single-key lookup
1816 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1817 dots are used instead of colons so that keys in lsearch files need not
1818 contain colons. This was done some time before quoting was made available
1819 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1820 (notated using the quote facility) so as to distinguish them from IPv4
1821 keys. This meant that lookups for IP addresses in host lists did not work
1822 for iplsearch lookups.
1824 This has been fixed by arranging for IPv6 addresses to be expressed with
1825 colons if the lookup type is iplsearch. This is not incompatible, because
1826 previously such lookups could never work.
1828 The situation is now rather anomolous, since one *can* have colons in
1829 ordinary lsearch keys. However, making the change in all cases is
1830 incompatible and would probably break a number of configurations.
1832 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1835 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1836 conversion specification without a maximum field width, thereby enabling
1837 a rogue spamd server to cause a buffer overflow. While nobody in their
1838 right mind would setup Exim to query an untrusted spamd server, an
1839 attacker that gains access to a server running spamd could potentially
1840 exploit this vulnerability to run arbitrary code as the Exim user.
1842 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1843 $primary_hostname instead of what libspf2 thinks the hosts name is.
1845 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1846 a directory entry by the name of the lookup key. Previously, if a
1847 symlink pointed to a non-existing file or a file in a directory that
1848 Exim lacked permissions to read, a lookup for a key matching that
1849 symlink would fail. Now it is enough that a matching directory entry
1850 exists, symlink or not. (Bugzilla 503.)
1852 PH/03 The body_linecount and body_zerocount variables are now exported in the
1855 PH/04 Added the $dnslist_matched variable.
1857 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1858 This means they are set thereafter only if the connection becomes
1861 PH/06 Added the client_condition to authenticators so that some can be skipped
1862 by clients under certain conditions.
1864 PH/07 The error message for a badly-placed control=no_multiline_responses left
1865 "_responses" off the end of the name.
1867 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1869 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1870 (without spaces) instead of just copying the configuration text.
1872 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1874 PH/11 Added $max_received_linelength.
1876 PH/12 Added +ignore_defer and +include_defer to host lists.
1878 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1879 way in which PCRE > 7.0 is built.
1881 PH/14 Implemented queue_only_load_latch.
1883 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1884 MAIL command. The effect was to mangle the value on 64-bit systems.
1886 PH/16 Another patch from the Sieve maintainer.
1888 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1890 PH/18 If a system quota error occurred while trying to create the file for
1891 a maildir delivery, the message "Mailbox is full" was not appended to the
1892 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1893 only to a quota excession during the actual writing of the file.
1895 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1896 characters?) which causes problems in log lines. The DN values are now
1897 passed through string_printing() before being added to log lines.
1899 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1900 and InterBase are left for another time.)
1902 PH/21 Added message_body_newlines option.
1904 PH/22 Guard against possible overflow in moan_check_errorcopy().
1906 PH/23 POSIX allows open() to be a macro; guard against that.
1908 PH/24 If the recipient of an error message contained an @ in the local part
1909 (suitably quoted, of course), incorrect values were put in $domain and
1910 $local_part during the evaluation of errors_copy.
1916 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1917 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1920 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1921 issue a MAIL command.
1923 PH/02 In an ACL statement such as
1925 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1927 if a client was not listed at all, or was listed with a value other than
1928 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1929 the condition was not true (as it should be), so access was not denied.
1930 The bug was that the ! inversion was incorrectly passed on to the second
1931 item. This has been fixed.
1933 PH/03 Added additional dnslists conditions == and =& which are different from
1934 = and & when the dns lookup returns more than one IP address.
1936 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1937 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1939 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1940 FSYNC, which compiles an option called disable_fsync that allows for
1941 bypassing fsync(). The documentation is heavily laced with warnings.
1943 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1945 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1946 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1947 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1948 including adding "make clean"; (3) Added -fPIC when compiling the test
1949 dynamically loaded module, to get rid of a warning.
1951 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1952 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1953 = 0s. The bug is otherwise harmless.
1955 PH/07 There was a bug in the dovecot authenticator such that the value of
1956 $auth1 could be overwritten, and so not correctly preserved, after a
1957 successful authentication. This usually meant that the value preserved by
1958 the server_setid option was incorrect.
1960 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1962 PH/09 Installed PCRE release 7.0.
1964 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1965 run for batched SMTP input. It is now run at the start of every message
1966 in the batch. While fixing this I discovered that the process information
1967 (output by running exiwhat) was not always getting set for -bs and -bS
1968 input. This is fixed, and it now also says "batched" for BSMTP.
1970 PH/11 Added control=no_pipelining.
1972 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1973 patch, slightly modified), and move the expansion of helo_data till after
1974 the connection is made in the smtp transport (so it can use these
1977 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1979 PH/14 Added log_selector = +pid.
1981 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1983 PH/16 Add ${if forany and ${if forall.
1985 PH/17 Added dsn_from option to vary the From: line in DSNs.
1987 PH/18 Flush SMTP output before performing a callout, unless control =
1988 no_callout_flush is set.
1990 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1991 was true (the default) a successful delivery failed to delete the retry
1992 item, thus causing premature timeout of the address. The bug is now
1995 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1997 PH/21 Long custom messages for fakedefer and fakereject are now split up
1998 into multiline reponses in the same way that messages for "deny" and
1999 other ACL rejections are.
2001 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2002 with slight modification.
2004 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2005 draft, changing the syntax and factoring some duplicate code".
2007 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2008 for deliveries of the second and subsequent messages over the same SMTP
2011 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2012 ${reduce, with only minor "tidies".
2014 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2016 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2017 expansion side effects.
2019 PH/27 When a message times out after an over-quota error from an Exim-imposed
2020 quota, the bounce message says "mailbox is full". This message was not
2021 being given when it was a system quota that was exceeded. It now should
2024 MH/03 Made $recipients available in local_scan(). local_scan() already has
2025 better access to the recipient list through recipients_list[], but
2026 $recipients can be useful in postmaster-provided expansion strings.
2028 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2029 in the case of a MAIL command with additional options following the
2030 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2031 were accidentally chopped off.
2033 PH/29 SMTP synchronization checks are implemented when a command is read -
2034 there is a check that no more input is waiting when there shouldn't be
2035 any. However, for some commands, a delay in an ACL can mean that it is
2036 some time before the response is written. In this time, more input might
2037 arrive, invalidly. So now there are extra checks after an ACL has run for
2038 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2039 pipelining has not been advertised.
2041 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2043 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2044 returned in the SMTP response when smtp_return_error_details was false.
2045 This has been fixed.
2047 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2048 instead of the C I/O that was originally supplied, because problems were
2049 reported on Solaris.
2051 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2052 Exim which did not show up earlier: it was assuming that a call to
2053 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2054 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2055 was a macro that became an assignment, so it seemed to work. This has
2056 changed to a proper function call with a void return, hence the compile
2057 error. Exim's code has been fixed.
2059 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2062 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2064 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2066 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2067 because it turns out to be too big or there is a timeout) there is no
2068 "Completed" line in the log. When some messages of this type were
2069 selected by exigrep, they were listed as "not completed". Others were
2070 picked up by some special patterns. I have improved the selection
2071 criteria to be more general.
2073 PH/38 The host_find_failed option in the manualroute router can now be set
2074 to "ignore", to completely ignore a host whose IP address cannot be
2075 found. If all hosts are ignored, the behaviour is controlled by the new
2076 host_all_ignored option.
2078 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2079 homing or because of multiple MX records with /mx) generated more than
2080 one IP address, and the following item turned out to be the local host,
2081 all the secondary addresses of the first item were incorrectly removed
2082 from the list, along with the local host and any following hosts (which
2083 is what is supposed to happen).
2085 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2086 whoever called Exim into the -H file. In the case of the daemon it was
2087 behaving confusingly. When first started, it used values for whoever
2088 started the daemon, but after a SIGHUP it used the Exim user (because it
2089 calls itself on a restart). I have changed the code so that it now always
2092 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2093 message are rejected with the same error (e.g. no authentication or bad
2094 sender address), and a DATA command is nevertheless sent (as can happen
2095 with PIPELINING or a stupid MUA), the error message that was given to the
2096 RCPT commands is included in the rejection of the DATA command. This is
2097 intended to be helpful for MUAs that show only the final error to their
2100 PH/42 Another patch from the Sieve maintainer.
2102 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2103 Eximstats - Fixed some broken HTML links and added missing column headers
2105 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2106 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2108 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2110 PH/43 Yet another patch from the Sieve maintainer.
2112 PH/44 I found a way to check for a TCP/IP connection going away before sending
2113 the response to the final '.' that terminates a message, but only in the
2114 case where the client has not sent further data following the '.'
2115 (unfortunately, this is allowed). However, in many cases there won't be
2116 any further data because there won't be any more messages to send. A call
2117 to select() can be used: if it shows that the input is "ready", there is
2118 either input waiting, or the socket has been closed. An attempt to read
2119 the next input character can distinguish the two cases. Previously, Exim
2120 would have sent an OK response which the client would never have see.
2121 This could lead to message repetition. This fix should cure that, at
2122 least in a lot of common cases.
2124 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2125 advertised in response to EHLO.
2131 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2132 fixed by 4.65/MH/01 (is this a record?) are fixed:
2134 (i) An empty string was always treated as zero by the numeric comparison
2135 operators. This behaviour has been restored.
2137 (ii) It is documented that the numeric comparison operators always treat
2138 their arguments as decimal numbers. This was broken in that numbers
2139 starting with 0 were being interpreted as octal.
2141 While fixing these problems I realized that there was another issue that
2142 hadn't been noticed. Values of message_size_limit (both the global option
2143 and the transport option) were treated as octal if they started with 0.
2144 The documentation was vague. These values are now always treated as
2145 decimal, and I will make that clear in the documentation.
2151 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2152 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2155 MH/01 Don't check that the operands of numeric comparison operators are
2156 integers when their expansion is in "skipping" mode (fixes bug
2157 introduced by 4.64-PH/07).
2159 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2160 child addresses, Exim now panics and dies. Previously, because the count
2161 is held in a short int, deliveries were likely to be lost. As such a
2162 large number of recipients for a single message is ridiculous
2163 (performance will be very, very poor), I have chosen to impose a limit
2164 rather than extend the field.
2170 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2171 leftover -K file (the existence of which was triggered by #402).
2172 While we were at it, introduced process PID as part of the -K
2173 filename. This should rule out race conditions when creating
2176 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2177 processing considerably. Previous code took too long for large mails,
2178 triggering a timeout which in turn triggers #401.
2180 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2181 in the DK code in transports.c. sendfile() is not really portable,
2182 hence the _LINUX specificness.
2184 TF/01 In the add_headers option to the mail command in an Exim filter,
2185 there was a bug that Exim would claim a syntax error in any
2186 header after the first one which had an odd number of characters
2189 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2190 callout verification, Exim cached a "reject" for the entire domain. This
2191 is correct for most verifications, but it is not correct for a recipient
2192 verification with use_sender or use_postmaster set, because in that case
2193 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2194 case of MAIL FROM:<> rejection from other early rejections (e.g.
2195 rejection of HELO). When verifying a recipient using a non-null MAIL
2196 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2197 Whatever the result of the callout, the value of the domain cache is
2198 left unchanged (for any other kind of callout, getting as far as trying
2199 RCPT means that the domain itself is ok).
2201 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2204 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2205 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2206 session, the daemon ignores ECONNECT errors and logs others; it now
2207 ignores EPIPE as well.
2209 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2210 (quoted-printable decoding).
2212 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2213 later the small subsequent patch to fix an introduced bug.
2215 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2217 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2219 PH/08 An error is now given if message_size_limit is specified negative.
2221 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2222 to be given (somewhat) arbitrary names.
2224 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2227 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2228 miscellaneous code fixes
2230 PH/10 Added the log_reject_target ACL modifier to specify where to log
2233 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2234 hostname. This is wrong, because it relates to the incoming message (and
2235 probably the interface on which it is arriving) and not to the outgoing
2236 callout (which could be using a different interface). This has been
2237 changed to use the value of the helo_data option from the smtp transport
2238 instead - this is what is used when a message is actually being sent. If
2239 there is no remote transport (possible with a router that sets up host
2240 addresses), $smtp_active_hostname is used.
2242 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2243 tweaks were necessary in order to get it to work (see also 21 below):
2244 (a) The code assumed that strncpy() returns a negative number on buffer
2245 overflow, which isn't the case. Replaced with Exim's string_format()
2247 (b) There were several signed/unsigned issues. I just did the minimum
2248 hacking in of casts. There is scope for a larger refactoring.
2249 (c) The code used strcasecmp() which is not a standard C function.
2250 Replaced with Exim's strcmpic() function.
2251 (d) The code set only $1; it now sets $auth1 as well.
2252 (e) A simple test gave the error "authentication client didn't specify
2253 service in request". It would seem that Dovecot has changed its
2254 interface. Fortunately there's a specification; I followed it and
2255 changed what the client sends and it appears to be working now.
2257 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2260 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2261 address A is aliased to B and C, where B exists and C does not. Without
2262 -v the output is "A verified" because verification stops after a
2263 successful redirection if more than one address is generated. However,
2264 with -v the child addresses are also verified. Exim was outputting "A
2265 failed to verify" and then showing the successful verification for C,
2266 with its parentage. It now outputs "B failed to verify", showing B's
2267 parentage before showing the successful verification of C.
2269 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2270 look up a TXT record in a specific list after matching in a combined
2273 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2274 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2275 they consult the DNS. I had assumed they would set it the way they
2276 wanted; and indeed my experiments on Linux seem to show that in some
2277 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2278 To be on the safe side, however, I have now made the interface to
2279 host_find_byname() similar to host_find_bydns(), with an argument
2280 containing the DNS resolver options. The host_find_byname() function now
2281 sets these options at its start, just as host_find_bydns() does. The smtp
2282 transport options dns_qualify_single and dns_search_parents are passed to
2283 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2284 of host_find_byname() use the default settings of RES_DEFNAMES
2285 (qualify_single) but not RES_DNSRCH (search_parents).
2287 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2288 spool_read_header() do less string testing, by means of a preliminary
2289 switch on the second character of optional "-foo" lines. (This is
2290 overdue, caused by the large number of possibilities that now exist.
2291 Originally there were few.) While I was there, I also converted the
2292 str(n)cmp tests so they don't re-test the leading "-" and the first
2293 character, in the hope this might squeeze out yet more improvement.
2295 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2296 flag allowing group syntax was set by the header_syntax check but not
2297 turned off, possible causing trouble later; (2) The flag was not being
2298 set at all for the header_verify test, causing "group"-style headers to
2299 be rejected. I have now set it in this case, and also caused header_
2300 verify to ignore an empty address taken from a group. While doing this, I
2301 came across some other cases where the code for allowing group syntax
2302 while scanning a header line wasn't quite right (mostly, not resetting
2303 the flag correctly in the right place). These bugs could have caused
2304 trouble for malformed header lines. I hope it is now all correct.
2306 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2307 with the "reply" argument non-NULL. The code, however (which originally
2308 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2309 but it didn't always do it. This confused somebody who was copying the
2310 code for some other use. I have removed all the tests.
2312 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2313 feature that was used to support insecure browsers during the U.S. crypto
2314 embargo. It requires special client support, and Exim is probably the
2315 only MTA that supported it -- and would never use it because real RSA is
2316 always available. This code has been removed, because it had the bad
2317 effect of slowing Exim down by computing (never used) parameters for the
2318 RSA_EXPORT functionality.
2320 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2321 authenticator to fail if there's a tab character in the incoming data
2322 (there should never be unless someone is messing about, as it's supposed
2323 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2324 if the connection is using TLS or if the remote IP is the same as the
2325 local IP, and the "valid-client-cert option" if a client certificate has
2328 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2329 authenticators. This can be used for authorization after authentication
2330 succeeds. (In the case of plaintext, it servers for both authentication
2333 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2334 if any retry times were supplied.
2336 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2337 connection, where there is no client IP address to check. In this
2338 situation, the verify now always succeeds.
2340 PH/25 Applied John Jetmore's -Mset patch.
2342 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2344 PH/27 In a string expansion for a processed (not raw) header when multiple
2345 headers of the same name were present, leading whitespace was being
2346 removed from all of them, but trailing whitespace was being removed only
2347 from the last one. Now trailing whitespace is removed from each header
2348 before concatenation. Completely empty headers in a concatenation (as
2349 before) are ignored.
2351 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2352 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2354 PH/29 [Removed. This was a change that I later backed out, and forgot to
2355 correct the ChangeLog entry (that I had efficiently created) before
2356 committing the later change.]
2358 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2359 address errors (4xx response to RCPT) over the same connection as other
2360 messages routed to the same hosts. Such deliveries are always "forced",
2361 so retry times are not inspected. This resulted in far too many retries
2362 for the affected addresses. The effect occurred only when there were more
2363 hosts than the hosts_max_try setting in the smtp transport when it had
2364 the 4xx errors. Those hosts that it had tried were not added to the list
2365 of hosts for which the message was waiting, so if all were tried, there
2366 was no problem. Two fixes have been applied:
2368 (i) If there are any address or message errors in an SMTP delivery, none
2369 of the hosts (tried or untried) are now added to the list of hosts
2370 for which the message is waiting, so the message should not be a
2371 candidate for sending over the same connection that was used for a
2372 successful delivery of some other message. This seems entirely
2373 reasonable: after all the message is NOT "waiting for some host".
2374 This is so "obvious" that I'm not sure why it wasn't done
2375 previously. Hope I haven't missed anything, but it can't do any
2376 harm, as the worst effect is to miss an optimization.
2378 (ii) If, despite (i), such a delivery is accidentally attempted, the
2379 routing retry time is respected, so at least it doesn't keep
2380 hammering the server.
2382 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2383 in ${readsocket because some servers need this prod.
2385 PH/32 Added some extra debug output when updating a wait-xxx database.
2387 PH/33 The hint "could be header name not terminated by colon", which has been
2388 given for certain expansion errors for a long time, was not being given
2389 for the ${if def:h_colon_omitted{... case.
2391 PH/34 The spec says: "With one important exception, whenever a domain list is
2392 being scanned, $domain contains the subject domain." There was at least
2393 one case where this was not true.
2395 PH/35 The error "getsockname() failed: connection reset by peer" was being
2396 written to the panic log as well as the main log, but it isn't really
2397 panic-worthy as it just means the connection died rather early on. I have
2398 removed the panic log writing for the ECONNRESET error when getsockname()
2401 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2402 runs only) independently of the message's sender address. This meant
2403 that, if the 4xx error was in fact related to the sender, a different
2404 message to the same recipient with a different sender could confuse
2405 things. In particualar, this can happen when sending to a greylisting
2406 server, but other circumstances could also provoke similar problems.
2407 I have changed the default so that the retry time for these errors is now
2408 based a combination of the sender and recipient addresses. This change
2409 can be overridden by setting address_retry_include_sender=false in the
2412 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2413 remote server are returned as part of bounce messages. This was not
2414 happening for LMTP over a pipe (the lmtp transport), but now it is the
2415 same for both kinds of LMTP.
2417 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2418 in header lines that were in fact CNAMEs. This is no longer the case.
2420 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2421 and queue runs started by the daemon processed all messages. This has
2422 been fixed so that -R and -S can now usefully be given with -q<time>.
2424 PH/40 Import PCRE release 6.7 (fixes some bugs).
2426 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2428 PH/42 Give an error if -q is specified more than once.
2430 PH/43 Renamed the variables $interface_address and $interface_port as
2431 $received_ip_address and $received_port, to make it clear that these
2432 values apply to message reception, and not to the outgoing interface when
2433 a message is delivered. (The old names remain recognized, of course.)
2435 PH/44 There was no timeout on the connect() call when using a Unix domain
2436 socket in the ${readsocket expansion. There now is.
2438 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2439 be meaningful with "accept".
2441 SC/01 Eximstats V1.43
2442 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2444 SC/02 Eximstats V1.44
2445 Use a glob alias rather than an array ref in the generated
2446 parser. This improves both readability and performance.
2448 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2449 Collect SpamAssassin and rejection statistics.
2450 Don't display local sender or destination tables unless
2451 there is data to show.
2452 Added average volumes into the top table text output.
2454 SC/04 Eximstats V1.46
2455 Collect data on the number of addresses (recipients)
2456 as well as the number of messages.
2458 SC/05 Eximstats V1.47
2459 Added 'Message too big' to the list of mail rejection
2460 reasons (thanks to Marco Gaiarin).
2462 SC/06 Eximstats V1.48
2463 Mainlog lines which have GMT offsets and are too short to
2464 have a flag are now skipped.
2466 SC/07 Eximstats V1.49 (Alain Williams)
2467 Added the -emptyok flag.
2469 SC/08 Eximstats V1.50
2470 Fixes for obtaining the IP address from reject messages.
2472 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2473 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2474 whitesspace changes from 4.64-PH/27
2476 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2479 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2480 are found, allow negative numbers in numeric criteria)
2482 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2484 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2485 to match changes made in 4.64-PH/43
2487 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2489 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2490 "domain" is actually an IP address, and force a failure. This locks out
2491 those revolvers/nameservers that support "A-for-A" lookups, in
2492 contravention of the specifications.
2494 PH/48 When a host name was looked up from an IP address, and the subsequent
2495 forward lookup of the name timed out, the host name was left in
2496 $sender_host_name, contrary to the specification.
2498 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2499 restricted to single-key lookups, Exim was not diagnosing an error if
2500 * or *@ was used with a query-style lookup.
2502 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2504 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2505 long ago, but noone interested enough thought of it. Let's just say that
2506 the "1.1" means that there are some new functions that weren't there at
2507 some point in the past.
2509 PH/51 Error processing for expansion failure of helo_data from an smtp
2510 transport during callout processing was broken.
2512 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2513 tested/used via the -bh/-bhc/-bs options.
2515 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2516 bug, fixed in subsequent PCRE releases).
2518 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2519 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2521 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2527 SC/01 Use a glob alias rather than an array ref in eximstats generated
2528 parser. This improves both readability and performance.
2530 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2531 Don't display local sender or destination tables in eximstats unless
2532 there is data to show.
2533 Added average volumes into the eximstats top table text output.
2535 SC/03 Collect data on the number of addresses (recipients) as well
2536 as the number of messages in eximstats.
2538 TF/01 Correct an error in the documentation for the redirect router. Exim
2539 does (usually) call initgroups() when daemonizing.
2541 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2542 with consistent privilege compared to when running as a daemon.
2544 TF/03 Note in the spec that $authenticated_id is not set for local
2545 submissions from trusted users.
2547 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2548 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2550 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2551 by adding some example configuration directives to the default
2552 configuration file. A little bit of work is required to uncomment the
2553 directives and define how usernames and passwords are checked, but
2554 there is now a framework to start from.
2556 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2557 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2558 without this. I don't know how relevant this is to other LDAP libraries.
2560 PH/02 Add the verb name to the "unknown ACL verb" error.
2562 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2564 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2566 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2567 directory not expanded when it should be if an expanded home directory
2568 was set for the address (which is overridden by the transport).
2570 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2573 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2574 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2575 because it is too late at that time, and has no effect.
2577 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2578 security issue with \' (bugzilla #107). I could not use the
2579 PQescapeStringConn() function, because it needs a PGconn value as one of
2582 PH/08 When testing addresses using -bt, indicate those final addresses that
2583 are duplicates that would not cause an additional delivery. At least one
2584 person was confused, thinking that -bt output corresponded to deliveries.
2585 (Suppressing duplicates isn't a good idea as you lose the information
2586 about possibly different redirections that led to the duplicates.)
2588 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2589 systems where poll() doesn't work, in particular OS X.
2591 PH/10 Added more information to debugging output for retry time not reached.
2593 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2594 operations in malware.c.
2596 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2599 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2600 syslog_duplication set false, log lines that would normally be written
2601 both the the main log and to the reject log were not written to syslog at
2604 PH/14 In the default configuration, change the use of "message" in ACL warn
2605 statements to "add_header".
2607 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2608 not followed by a command (e.g. "seen endif").
2610 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2611 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2614 PH/17 Added extra conditions to the default value of delay_warning_condition
2618 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2619 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2620 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2623 The Auto-Submitted: and various List- headers are standardised, whereas I
2624 don't think Precedence: ever was.
2626 PH/18 Refactored debugging code in route_finduser() to show more information,
2627 in particular, the error code if getpwnam() issues one.
2629 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2630 This is apparently needed in addition to the PH/07 change above to avoid
2631 any possible encoding problems.
2633 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2634 but not after initializing Perl.
2636 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2637 output them only if debugging. By default they are written stderr,
2638 apparently, which is not desirable.
2640 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2643 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2646 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2648 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2649 authenticated or an ident call has been made. Suppress the default
2650 values for $authenticated_id and $authenticated_sender (but permit -oMai
2651 and -oMas) when testing with -bh.
2653 PH/24 Re-jigged the order of the tests in the default configuration so that the
2654 tests for valid domains and recipients precede the DNS black list and CSA
2655 tests, on the grounds that those ones are more expensive.
2657 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2658 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2659 This bug exists in every version of Exim that I still have, right back to
2662 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2663 However, an attempt to turn on case-sensitivity in a regex key by
2664 including (?-i) didn't work because the subject string was already
2665 lowercased, and the effects were non-intuitive. It turns out that a
2666 one-line patch can be used to allow (?-i) to work as expected.
2672 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2673 other effects) broke the use of negated acl sub-conditions.
2675 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2678 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2679 "Deny" causes Exim to reject the incoming connection with a 554 error.
2680 Unfortunately, if there is a major crisis, such as a disk failure,
2681 tcp-wrappers gives "deny", whereas what one would like would be some
2682 kind of temporary error. A kludge has been added to help with this.
2683 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2684 554 error is used if errno is still zero or contains ENOENT (which occurs
2685 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2688 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2690 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2691 errors. Otherwise a message that provokes a temporary error (when other
2692 messages do not) can cause a whole host to time out.
2694 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2695 addresses were routed directly to files or pipes from a redirect router.
2696 File deliveries just didn't batch; pipe deliveries might have suffered
2699 PH/06 A failure to get a lock for a hints database would erroneously always say
2700 "Failed to get write lock", even when it was really a read lock.
2702 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2703 of 0600. This has been changed to use the value of the lockfile_mode
2704 option (which defaults to 0600).
2706 PH/08 Applied small patch from the Sieve maintainer.
2708 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2709 folder from quota calculations, a direct delivery into this folder messed
2710 up the contents of the maildirsize file. This was because the regex was
2711 used only to exclude .Trash (or whatever) when the size of the mailbox
2712 was calculated. There was no check that a delivery was happening into an
2713 excluded directory. This bug has been fixed by ignoring all quota
2714 processing for deliveries into excluded directories.
2716 PH/10 Added the maildirfolder_create_regex option to appendfile.
2722 PH/01 The code for finding all the local interface addresses on a FreeBSD
2723 system running IPv6 was broken. This may well have applied to all BSD
2724 systems, as well as to others that have similar system calls. The broken
2725 code found IPv4 interfaces correctly, but gave incorrect values for the
2726 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2727 that it would not match correctly against @[] and not recognize the IPv6
2730 PH/02 The ipliteral router was not recognizing addresses of the form user@
2731 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2733 PH/03 Added disable_ipv6.
2735 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2736 decoded form, because it is most often used to construct To: headers
2737 lines in autoreplies, and the decoded form may well be syntactically
2738 invalid. However, $reply_address has leading white space removed, and all
2739 newlines turned into spaces so that the autoreply transport does not
2742 PH/05 If group was specified without a user on a router, and no group or user
2743 was specified on a transport, the group from the router was ignored.
2745 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2746 for visible compile-time settings that can be used to change these
2747 numbers, for those that want even more. Backwards compatibility with old
2748 spool files has been maintained. However, going back to a previous Exim
2749 release will lost any variables that are in spool files.
2751 PH/07 Two small changes when running in the test harness: increase delay when
2752 passing a TCP/IP connection to a new process, in case the original
2753 process has to generate a bounce, and remove special handling of
2754 127.0.0.2 (sic), which is no longer necessary.
2756 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2757 be the same on different OS.
2759 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2762 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2763 whether --show-vars was specified or not
2765 JJ/02 exipick: Added support for new ACL variable spool format introduced
2768 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2769 syntactically invalid From: or Reply-to: line, and a filter used this to
2770 generate an autoreply, and therefore failed to obtain an address for the
2771 autoreply, Exim could try to deliver to a non-existent relative file
2772 name, causing unrelated and misleading errors. What now happens is that
2773 it logs this as a hard delivery error, but does not attempt to create a
2776 PH/11 The exinext utility has a -C option for testing purposes, but although
2777 the given file was scanned by exinext itself; it wasn't being passed on
2778 when Exim was called.
2780 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2781 an end-of-file indication when reading a command response.
2783 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2784 compiled. In many other places in Exim, IPv6 addresses are always
2785 recognized, so I have changed this. It also means that IPv4 domain
2786 literals of the form [IPV4:n.n.n.n] are now always recognized.
2788 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2789 used if the router is not running as root, for example, when verifying at
2790 ACL time, or when using -bh. The debugging output from this situation was
2791 non-existent - all you got was a failure to exec. I have made two
2794 (a) Failures to set uid/gid, the current directory, or a process leader
2795 in a subprocess such as that created by queryprogram now generate
2796 suitable debugging ouput when -d is set.
2798 (b) The queryprogram router detects when it is not running as root,
2799 outputs suitable debugging information if -d is set, and then runs
2800 the subprocess without attempting to change uid/gid.
2802 PH/15 Minor change to Makefile for building test_host (undocumented testing
2805 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2806 additional section of a DNS packet that returns MX or SRV records.
2807 Instead, it always explicitly searches for A/AAAA records. This avoids
2808 major problems that occur when a DNS server includes only records of one
2809 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2810 fixed another bug: if SRV records were looked up and the corresponding
2811 address records were *not* found in the additional section, the port
2812 values from the SRV records were lost.
2814 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2815 using the correct key (the original address) when searching the retry
2816 rules in order to find which one to use for generating the retry hint.
2818 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2819 adding the default one. Similarly, if it contains a Reply-To: header, the
2820 errors_reply_to option, if set, is not used.
2822 PH/19 When calculating a retry time, Exim used to measure the "time since
2823 failure" by looking at the "first failed" field in the retry record. Now
2824 it does not use this if it is later than than the arrival time of the
2825 message. Instead it uses the arrival time. This makes for better
2826 behaviour in cases where some deliveries succeed, thus re-setting the
2827 "first failed" field. An example is a quota failure for a huge message
2828 when small messages continue to be delivered. Without this change, the
2829 "time since failure" will always be short, possible causing more frequent
2830 delivery attempts for the huge message than are intended.
2831 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2833 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2834 $1, $2, $3) because the numerical variables can be reset during some
2835 expansion items (e.g. "match"), thereby losing the authentication data.
2837 PH/21 Make -bV show the size of off_t variables so that the test suite can
2838 decide whether to run tests for quotas > 2G.
2840 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2841 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2842 filecount value is greater than 2G or if a quota value is greater than 2G
2843 on a system where the size of off_t is not greater than 4, a panic error
2846 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2847 never match. The debug and -bh output now contains an explicit error
2848 message indicating a malformed IPv4 address or mask.
2850 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2851 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2852 PH/23 above applies.
2854 PH/25 Do not write to syslog when running in the test harness. The only
2855 occasion when this arises is a failure to open the main or panic logs
2856 (for which there is an explicit test).
2858 PH/26 Added the /no_tell option to "control=freeze".
2860 PH/27 If a host name lookup failed very early in a connection, for example, if
2861 the IP address matched host_lookup and the reverse lookup yielded a name
2862 that did not have a forward lookup, an error message of the form "no IP
2863 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2864 could be logged. Now it outputs the IP address instead of "NULL".
2866 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2867 allows the sender and the authenticated sender to be set when
2868 submitting a message from within Exim. Since child_open_exim() is
2869 documented for local_scan(), the new function should be too.
2871 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2872 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2873 results in an empty string is now treated as unset.
2875 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2877 PH/31 Added sender_verify_fail logging option.
2879 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2880 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2881 tidied the source and removed it altogether.
2883 PH/33 When a queue run was abandoned because the load average was too high, a
2884 log line was always written; now it is written only if the queue_run log
2885 selector is set. In addition, the log line for abandonment now contains
2886 information about the queue run such as the pid. This is always present
2887 in "start" and "stop" lines but was omitted from the "abandon" line.
2889 PH/34 Omit spaces between a header name and the colon in the error message that
2890 is given when verify = headers_syntax fails (if there are lots of them,
2891 the message gets confusing).
2893 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2894 names, as there are now some PTR records that contain slashes. This check
2895 is only to protect against broken name servers that fall over on strange
2896 characters, so the fact that it applies to all lookups doesn't matter.
2898 PH/36 Now that the new test suite is complete, we can remove some of the
2899 special code in Exim that was needed for the old test suite. For example,
2900 sorting DNS records because real resolvers return them in an arbitrary
2901 order. The new test suite's fake resolver always returns records in the
2904 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2905 bounces) except when queue_only is set, to avoid logging races between
2906 the different processes.
2908 PH/38 Panic-die if .include specifies a non-absolute path.
2910 PH/39 A tweak to the "H" retry rule from its user.
2912 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2913 a label. They prevented compilation on older perls.
2915 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2916 a warning to be raised on newish perls.
2918 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2919 on queue. Changes to match documented behaviour of showing count of
2920 messages matching specified criteria.
2922 PH/40 Changed the default ident timeout from 30s to 5s.
2924 PH/41 Added support for the use of login_cap features, on those BSD systems
2925 that have them, for controlling the resources used by pipe deliveries.
2927 PH/42 The content-scanning code uses fopen() to create files in which to put
2928 message data. Previously it was not paying any attention to the mode of
2929 the files. Exim runs with umask(0) because the rest of the code creates
2930 files with open(), and sets the required mode explicitly. Thus, these
2931 files were ending up world-writeable. This was not a big issue, because,
2932 being within the spool directory, they were not world-accessible. I have
2933 created a function called modefopen, which takes an additional mode
2934 argument. It sets umask(777), creates the file, chmods it to the required
2935 mode, then resets the umask. All the relevant calls to fopen() in the
2936 content scanning code have been changed to use this function.
2938 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2939 to 24 hours. This avoids potential overflow problems when processing G
2940 and H retry rules. I suspect nobody ever tinkers with this value.
2942 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2944 PH/45 When the plaintext authenticator is running as a client, the server's
2945 challenges are checked to ensure they are valid base64 strings. By
2946 default, the authentication attempt is cancelled if an invalid string is
2947 received. Setting client_ignore_invalid_base64 true ignores these errors.
2948 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2949 they are received. Thus, the responses can be made to depend on the
2950 challenges. If an invalid string is ignored, an empty string is placed in
2953 PH/46 Messages that are created by the autoreply transport now contains a
2954 References: header, in accordance with RFCs 2822 and 3834.
2956 PH/47 Added authenticated_sender_force to the smtp transport.
2958 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2960 PH/49 Installed latest patch from the Sieve maintainer.
2962 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2963 was also set, the appendfile transport was unnecessarily scanning a
2964 directory of message files (e.g. for maildir delivery) to find the count
2965 of files (along with the size), even though it did not need this
2966 information. It now does the scan only if it needs to find either the
2967 size of the count of files.
2969 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2971 PH/52 Two bugs concerned with error handling when the smtp transport is
2974 (i) Exim was not creating retry information for temporary errors given
2975 for individual recipients after the DATA command when the smtp transport
2976 was used in LMTP mode. This meant that they could be retried too
2977 frequently, and not timed out correctly.
2979 (ii) Exim was setting the flag that allows error details to be returned
2980 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2981 recipients that were returned after the DATA command.
2983 PH/53 This is related to PH/52, but is more general: for any failing address,
2984 when detailed error information was permitted to be returned to the
2985 sender, but the error was temporary, then after the final timeout, only
2986 "retry timeout exceeded" was returned. Now it returns the full error as
2987 well as "retry timeout exceeded".
2989 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2990 do this, and (what is worse) MTAs that accept it.
2992 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2993 will now be deprecated.
2995 PH/56 New os.c-cygwin from the Cygwin maintainer.
2997 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2998 formats (previously only available in exim formats via -bpr, -bpru,
2999 and -bpra. Now also available in native and exiqgrep formats)
3001 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3002 with very large, slow to parse queues
3004 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3006 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3008 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3009 responses to authentication challenges, though it was showing the
3010 challenges; (ii) I've removed the CR characters from the debug output for
3013 PH/58 Allow for the insertion of a newline as well as a space when a string
3014 is turned into more than one encoded-word during RFC 2047 encoding. The
3015 Sieve code now uses this.
3017 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3018 data_4xx, lost_connection, tls_required.
3020 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3021 message was being sent as an SMTP response.
3023 PH/61 Add -l and -k options to exicyclog.
3025 PH/62 When verifying, if an address was redirected to one new address, so that
3026 verification continued, and the new address failed or deferred after
3027 having set something in $address_data, the value of $address_data was not
3028 passed back to the ACL. This was different to the case when no
3029 redirection occurred. The value is now passed back in both cases.
3031 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3032 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3033 use login_cap.h, so on its own it isn't the distinguishing feature. The
3034 new name refers directly to the setclassresources() function.
3036 PH/65 Added configuration files for NetBSD3.
3038 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3040 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3041 is preferred over IPv4.
3043 PH/68 The bounce_return_message and bounce_return_body options were not being
3044 honoured for bounces generated during the reception of non-SMTP messages.
3045 In particular, this applied to messages rejected by the ACL. This bug has
3046 been fixed. However, if bounce_return_message is true and bounce_return_
3047 body is false, the headers that are returned for a non-SMTP message
3048 include only those that have been read before the error was detected.
3049 (In the case of an ACL rejection, they have all been read.)
3051 PH/69 The HTML version of the specification is now built in a directory called
3052 spec_html instead of spec.html, because the latter looks like a path with
3053 a MIME-type, and this confuses some software.
3055 PH/70 Catch two compiler warnings in sieve.c.
3057 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3058 function verify_get_ident() calls ip_connect() to connect a socket, but
3059 if the "connect()" function timed out, ip_connect() used to close the
3060 socket. However, verify_get_ident() also closes the socket later, and in
3061 between Exim writes to the log, which may get opened at this point. When
3062 the socket was closed in ip_connect(), the log could get the same file
3063 descriptor number as the socket. This naturally causes chaos. The fix is
3064 not to close the socket in ip_connect(); the socket should be closed by
3065 the function that creates it. There was only one place in the code where
3066 this was missing, in the iplookup router, which I don't think anybody now
3067 uses, but I've fixed it anyway.
3069 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3070 well as to direct DNS lookups. Otherwise the handling of names in host
3071 lists is inconsistent and therefore confusing.
3077 PH/01 Two changes to the default runtime configuration:
3079 (1) Move the checks for relay_from_hosts and authenticated clients from
3080 after to before the (commented out) DNS black list checks.
3082 (2) Add control=submission to the relay_from_hosts and authenticated
3083 clients checks, on the grounds that messages accepted by these
3084 statements are most likely to be submissions.
3086 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3088 (1) Generate an error if the third argument for the ${prvs expansion is
3091 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3094 (3) Reset the variables that are obtained from the first argument of
3095 ${prvscheck and used in the second argument before leaving the code,
3096 because their memory is reclaimed, so using them afterwards may do
3099 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3100 one (it's much easier than Tom thought :-).
3102 (5) Because of (4), we can now allow for the use of $prvscheck_result
3103 inside the third argument.
3105 PH/03 For some reason, the default setting of PATH when running a command from
3106 a pipe transport was just "/usr/bin". I have changed it to
3109 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3110 anything to be listed in the output from -bV.
3112 PH/05 When a filter generated an autoreply, the entire To: header line was
3113 quoted in the delivery log line, like this:
3115 => >A.N.Other <ano@some.domain> <original@ddress> ...
3117 This has been changed so that it extracts the operative address. There
3118 may be more than one such address. If so, they are comma-separated, like
3121 => >ano@some.domain,ona@other.domain <original@ddress> ...
3123 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3124 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3125 not being looked up in the rDNS to get a host name, Exim was showing the
3126 IP address twice in Received: lines, even though the IP addresses were
3127 identical. For example:
3129 Received: from [1.2.3.4] (helo=[1.2.3.4])
3131 However, if the real host name was known, it was omitting the HELO data
3132 if it matched the actual IP address. This has been tidied up so that it
3133 doesn't show the same IP address twice.
3135 PH/07 When both +timestamp and +memory debugging was on, the value given by
3136 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3137 called by the debug printing, thereby overwriting the timestamp buffer.
3138 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3140 PH/08 When the original message was included in an autoreply transport, it
3141 always said "this is a copy of the message, including all the headers",
3142 even if body_only or headers_only was set. It now gives an appropriate
3145 PH/09 Applied a patch from the Sieve maintainer which:
3147 o fixes some comments
3148 o adds the (disabled) notify extension core
3149 o adds some debug output for the result of if/elsif tests
3150 o points to the current vacation draft in the documentation
3151 and documents the missing references header update
3155 o fixes a bug in processing the envelope test (when testing
3156 multiple envelope elements, the last element determinted the
3159 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3160 Electronic Mail") by including:
3162 Auto-submitted: auto-generated
3164 in the messages that it generates (bounce messages and others, such as
3165 warnings). In the case of bounce messages for non-SMTP mesages, there was
3166 also a typo: it was using "Auto_submitted" (underscore instead of
3167 hyphen). Since every message generated by Exim is necessarily in response
3168 to another message, thes have all been changed to:
3170 Auto-Submitted: auto-replied
3172 in accordance with these statements in the RFC:
3174 The auto-replied keyword:
3176 - SHOULD be used on messages sent in direct response to another
3177 message by an automatic process,
3179 - MUST NOT be used on manually-generated messages,
3181 - MAY be used on Delivery Status Notifications (DSNs) and Message
3182 Disposition Notifications (MDNs),
3184 - MUST NOT be used on messages generated by automatic or periodic
3185 processes, except for messages which are automatic responses to
3188 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3189 to the default Received: header definition.
3191 PH/12 Added log selector acl_warn_skipped (default on).
3193 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3194 variables because (a) they are in the wrong storage pool and (b) even if
3195 they were copied, it wouldn't work properly because of the caching.
3197 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3198 checking when decoding. Apparently there are clients that generate
3199 overlong encoded strings. Why am I not surprised?
3201 PH/15 If the first argument of "${if match_address" was not empty, but did not
3202 contain an "@" character, Exim crashed. Now it writes a panic log message
3203 and treats the condition as false.
3205 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3207 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3208 extension "envelope-auth". The code is finished and in agreement with
3209 other implementations, but there is no documentation so far and in fact,
3210 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3211 not changing the active code.
3213 Print executed "if" and "elsif" statements when debugging is used. This
3214 helps a great deal to understand what a filter does.
3216 Document more things not specified clearly in RFC3028. I had all this
3217 sorted out, when out of a sudden new issues came to my mind. Oops."
3219 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3222 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3223 canonical form (as documented). However, after a host name lookup from
3224 the IP address, check_host() was doing a simple string comparison with
3225 addresses acquired from the DNS when checking that the found name did
3226 have the original IP as one of its addresses. Since any found IPv6
3227 addresses are likely to be in abbreviated form, the comparison could
3228 fail. Luckily, there already exists a function for doing the comparison
3229 by converting both addresses to binary, so now that is used instead of
3230 the text comparison.
3232 PH/20 There was another similar case to PH/19, when a complete host name was
3233 given in a host list; looking up its IP address could give an abbreviated
3234 form, whereas the current host's name might or might not be abbreviated.
3235 The same fix has been applied.
3241 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3242 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3245 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3246 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3248 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3250 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3251 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3252 Also, for "Auto-Submitted", treat anything other than "no" as
3253 non-personal, in accordance with RFC 3834. (Previously it treated
3254 anything starting "auto-" as non-personal.)
3256 TF/01 The control=submission/name=... option had a problem with syntax
3257 errors if the name included a slash character. The /name= option
3258 now slurps the rest of the string, so it can include any characters
3259 but it must come last in the list of options (after /sender_retain
3262 PH/05 Some modifications to the interface to the fake nameserver for the new
3270 TK/01 Added the "success_on_redirect" address verification option. See
3271 NewStuff for rationale and an example.
3273 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3275 PH/02 Patch to exigrep to allow it to work on syslog lines.
3277 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3278 fread() to skip over the body file's header line, because in Cygwin the
3279 header line is locked and is inaccessible.
3281 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3282 co-exist for some time) to make it clear that it is the Exim ID that is
3283 referenced, not the Message-ID: header line.
3285 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3286 string_format() function, because snprintf() does not exist on all
3289 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3290 ${stat: expansion item.
3292 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3293 protocol synchronization error", to keep the pedants happy.
3295 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3296 well as for IRIX systems, when gcc is being used. See the host.c source
3299 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3301 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3304 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3305 transport and to the smtp transport in LMTP mode.
3307 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3309 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3310 run a filter in a subprocess. This could lead to confusion in subsequent
3311 lookups in the parent process. There should also be a search_tidyup() at
3312 the end of the subprocess.
3314 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3315 only if the host matched helo_try_verify_hosts, which caused the
3316 verification to occur when the EHLO/HELO command was issued. The ACL just
3317 tested the remembered result. Now, if a previous verification attempt has
3318 not happened, "verify = helo" does it there and then.
3320 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3322 TK/03 Fix log output including CR from clamd.
3324 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3325 exist provoked a memory error which could cause a segfault.
3327 PH/15 Installed PCRE 6.2
3329 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3331 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3332 of the problem. Specifically, suggested +O2 rather than +O1 for the
3335 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3337 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3338 record, the port was not correctly logged when the outgoing_port log
3339 selector was set (it logged the transort's default port).
3341 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3342 fallback_hosts, and "hosts" in the smtp transport.
3344 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3345 host errors such as "Connection refused".
3347 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3348 authentication with radiusclient 0.4.9:
3350 - Error returned from rc_read_config was caught wrongly
3351 - Username/password not passed on to radius server due to wrong length.
3353 The presumption is that some radiusclient API changes for 4.51/PH/17
3354 were not taken care of correctly. The code is still untested by me (my
3355 Linux distribution still has 0.3.2 of radiusclient), but it was
3356 contributed by a Radius user.
3358 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3359 expanding the "port" option of the smtp transport.
3361 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3362 while reading a MIME header. Thanks to Tom Hughes for a patch.
3364 PH/24 Include config.h inside local_scan.h so that configuration settings are
3367 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3368 that in an ACL for RCPT (for example), you can examine exactly what was
3371 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3372 commands, but it was not correctly comparing the address with the actual
3373 client host address. Thus, it would show the EHLO address in Received:
3374 header lines when this was not necessary.
3376 PH/27 Added the % operator to ${eval:}.
3378 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3379 it should be ignoring failures (because with -C, for example, it has lost
3380 privilege). It wasn't ignoring creation failures other than "already
3383 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3386 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3387 because an input line was too long, either on its own, or by virtue of
3388 too many continuations, the temporary file was not being removed, and the
3389 return code was incorrect.
3391 PH/31 Missing "BOOL" in function definition in filtertest.c.
3393 PH/32 Applied Sieve patches from the maintainer.
3395 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3397 PH/33 Added "verify = not_blind".
3399 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3400 Local/Makefile (with some defaults set). These are used in built scripts
3401 such as exicyclog, but they have never been used in the exim_install
3402 script (though there are many overriding facilities there). I have
3403 arranged that the exim_install script now takes note of these two
3406 PH/35 Installed configuration files for Dragonfly.
3408 PH/36 When a locally submitted message by a trusted user did not contain a
3409 From: header, and the sender address was obtained from -f or from an SMTP
3410 MAIL command, and the trusted user did not use -F to supply a sender
3411 name, $originator_name was incorrectly used when constructing a From:
3412 header. Furthermore, $originator_name was used for submission mode
3413 messages from external hosts without From: headers in a similar way,
3414 which is clearly wrong.
3416 PH/37 Added control=suppress_local_fixups.
3418 PH/38 When log_selector = +received_sender was set, and the addition of the
3419 sender made the log line's construction buffer exactly full, or one byte
3420 less than full, an overflow happened when the terminating "\n" was
3423 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3424 when the result of a list match is failure because a DNS lookup failed.
3426 PH/40 RM_COMMAND is now used in the building process.
3428 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3429 the "build-* directories that it finds.
3431 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3432 address in a domain literal was a prefix of an interface address.
3434 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3435 when verifying a sender address, unless rewrite_headers is false.
3437 PH/44 Wrote a long comment about why errors_to addresses are verified as
3438 recipients, not senders.
3440 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3441 the ratelimit ACL was added.
3443 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3445 PH/46 Added extra information about PostgreSQL errors to the error string.
3447 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3448 avoiding the need to install special zones in a real server. This is
3449 backwards compatible; if it can't find the fake resolver, it drops back.
3450 Thus, both old and new test suites can be run.
3452 TF/02 Added util/ratelimit.pl
3454 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3455 clock is set back in time.
3457 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3458 Candler <B.Candler@pobox.com>.
3460 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3461 OK for addresses that are the result of redirections.
3463 PH/48 A number of further additions for the benefit of the new test suite,
3464 including a fake gethostbyname() that interfaces to the fake DNS resolver
3467 TF/06 The fix for widen_domains has also been applied to qualify_single and
3468 search_parents which are the other dnslookup options that can cause
3471 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3474 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3476 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3477 service" if it encountered an MX record with an empty target hostname.
3478 The message is now "an MX or SRV record indicated no SMTP service".
3480 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3481 if the DNS of the sending site is misconfigured. This is quite a
3482 common situation. This change restores the behaviour of treating a
3483 helo verification defer as a failure.
3485 PH/51 If self=fail was set on a router, the bounce message did not include the
3486 actual error message.
3492 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3494 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3495 command itself ended in error, the underlying message about the transport
3496 filter timeout was being overwritten with the pipe command error. Now the
3497 underlying error message should be appended to the second error message.
3499 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3501 PH/02 Reduce the amount of output that "make" produces by default. Full output
3502 can still be requested.
3504 PH/03 The warning log line about a condition test deferring for a "warn" verb
3505 was being output only once per connection, rather than after each
3506 occurrence (because it was using the same function as for successful
3507 "warn" verbs). This seems wrong, so I have changed it.
3509 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3510 it should not have, which might have caused a crash in the right
3511 circumstances, but probably never did.
3513 PH/04 Installed a modified version of Tony Finch's patch to make submission
3514 mode fix the return path as well as the Sender: header line, and to
3515 add a /name= option so that you can make the user's friendly name appear
3518 TF/03 Added the control = fakedefer ACL modifier.
3520 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3521 Mark Lowes for thorough testing.
3523 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3525 TK/03 Merged latest SRS patch from Miles Wilton.
3527 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3528 with the definition in sysexits.h (which is #included earlier).
3529 Fortunately, Exim does not actually use EX_OK. The code used to try to
3530 preserve the sysexits.h value, by assumimg that macro definitions were
3531 scanned for macro replacements. I have been disabused of this notion,
3532 so now the code just undefines EX_OK before #including unistd.h.
3534 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3535 in the smtp transport. When a block could not be written in a single
3536 write() function, the timeout was being re-applied to each part-write.
3537 This seems wrong - if the receiver was accepting one byte at a time it
3538 would take for ever. The timeout is now adjusted when this happens. It
3539 doesn't have to be particularly precise.
3541 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3542 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3544 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3545 without a domain if the check to <postmaster@domain> fails.
3547 SC/01 Eximstats: added -xls and the ability to specify output files
3548 (patch written by Frank Heydlauf).
3550 SC/02 Eximstats: use FileHandles for outputing results.
3552 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3554 SC/04 Eximstats: fixed display of large numbers with -nvr option
3556 SC/05 Eximstats: fixed merging of reports with empty tables.
3558 SC/06 Eximstats: added the -include_original_destination flag
3560 SC/07 Eximstats: removed tabs and trailing whitespace.
3562 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3564 TK/06 MBOX spool code: Add real "From " MBOX separator line
3565 so the .eml file is really in mbox format (even though
3566 most programs do not really care). Patch from Alex Miller.
3568 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3569 The latter is generated from $received_to and is only set if the
3570 message has one envelope recipient. SA can use these headers,
3571 obviously out-of-the-box. Patch from Alex Miller.
3573 PH/08 The ${def test on a variable was returning false if the variable's
3574 value was "0", contrary to what the specification has always said!
3575 The result should be true unless the variable is empty.
3577 PH/09 The syntax error of a character other than { following "${if
3578 def:variable_name" (after optional whitespace) was not being diagnosed.
3579 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3580 accidental colon was present, for example, could give incorrect results.
3582 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3583 result is used (not including appendfile, where other changes are about
3586 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3587 This involved changing a lot of size variables from int to off_t. It
3588 should work with maildirs and everything.
3590 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3591 spamd dying while we are connected to it.
3593 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3596 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3597 function for BDB 4.3.
3599 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3601 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3602 the sources for PCRE have been re-arranged and more files are now
3605 PH/15 The code I had for printing potentially long long variables in PH/11
3606 above was not the best (it lost precision). The length of off_t variables
3607 is now inspected at build time, and an appropriate printing format (%ld
3608 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3609 to be "long long int" or "long int". This is needed for the internal
3610 formatting function string_vformat().
3612 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3613 the configuration file to be ":syslog", then the script "guesses" where
3614 the logs files are, rather than using the compiled in default. In our
3615 case the guess is not the same as the compiled default, so the script
3616 suddenly stopped working when I started to use syslog. The patch checks
3617 to see if log_file_path is "". If so, it attempts to read it from exim
3618 with no configuration file to get the compiled in version, before it
3619 falls back to the previous guessing code."
3621 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3622 implementing BATV in an Exim configuration. See NewStuff for the gory
3625 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3626 Makefile that are specific to HP-UX.
3628 PH/18 If the "use_postmaster" option was set for a recipient callout together
3629 with the "random" option, the postmaster address was used as the MAIL
3630 FROM address for the random test, but not for the subsequent recipient
3631 test. It is now used for both.
3633 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3634 patch removes a few documentation additions to RFC 3028, because the
3635 latest draft now contains them. It adds the new en;ascii-case comparator
3636 and a new error check for 8bit text in MIME parts. Comparator and
3637 require names are now matched exactly. I enabled the subaddress
3638 extension, but it is not well tested yet (read: it works for me)."
3640 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3641 rework some of the code of TK/09 above to avoid the hardwired use of
3642 "%lld" and "long long". Replaced the call to snprintf() with a call to
3645 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3646 records point to non-existent hosts", "retry timeout exceeded", and
3647 "retry time not reached for any host after a long failure period".
3649 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3650 experimental DomainKeys support:
3652 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3653 (2) On an error such as an illegally used "control", the wrong name for
3654 the control was given.
3656 These problems did NOT occur unless DomainKeys support was compiled.
3658 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3660 PH/24 Added ${if match_ip condition.
3662 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3663 databases so that it will be absolutely obvious if a crash occurs in the
3664 DB library. This is a regular occurrence (often caused by mis-matched
3667 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3668 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3669 picked up on a user's system that detects such things. There doesn't seem
3670 to be a gcc warning option for this - only an attribute that has to be
3671 put on the function's prototype. It seems that in Fedora Core 4 they have
3672 set this on a number of new functions. No doubt there will be more in due
3675 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3676 specify a transport. However, if an address that was verified by such a
3677 router was the subject of a callout, Exim crashed because it tried to
3678 read the rcpt_include_affixes from the non-existent transport. Now it
3679 just assumes that the setting of that option is false. This bug was
3680 introduced by 4.51/PH/31.
3682 PH/28 Changed -d+all to exclude +memory, because that information is very
3683 rarely of interest, but it makes the output a lot bigger. People tend to
3684 do -d+all out of habit.
3686 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3687 code in os-type was giving problems when libc.so lives in lib64, like on
3690 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3691 aren't the modern standard, and it seems that some systems' include files
3692 don't always have them. Exim was already checking for some of the newer
3693 ones like T_AAAA, and defining it itself. I've added checks for all the
3694 record types that Exim uses.
3696 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3697 not automatically generating a new one, as it is supposed to. This
3698 prevented TLS from working. If the file did exist, but contained invalid
3699 data, a new version was generated, as expected. It was only the case of a
3700 non-existent file that was broken.
3702 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3703 with a change in libdomainkeys > 0.64.
3705 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3706 from DNS. If the selector record carries the flag, it now has
3707 precedence over the domain-wide flag.
3709 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3711 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3712 the use of a port name that isn't defined in /etc/services) occurred, the
3713 message was deferred as in a normal delivery, and thus remained on the
3714 spool, instead of being failed because of the mua_wrapper setting. This
3715 is now fixed, and I tidied up some of the mua_wrapper messages at the
3718 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3719 the messages in a hash of arrays rather than using individual hashes.
3720 This is a bit cleaner and results in dramatic memory savings, albeit
3721 at a slight CPU cost.
3723 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3724 as requested by Marc Sherman.
3726 SC/10 Eximstats: added histograms for user specified patterns as requested
3729 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3731 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3732 fopen() in the content-scanning modules that did not already have it.
3738 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3739 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3741 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3743 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3745 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3746 to test Sieve filters that use "vacation".
3748 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3749 that changes the way the GnuTLS parameters are stored in the cache file.
3750 The new format can be generated externally. For backward compatibility,
3751 if the data in the cache doesn't make sense, Exim assumes it has read an
3752 old-format file, and it generates new data and writes a new file. This
3753 means that you can't go back to an older release without removing the
3756 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3757 work if there are any delivery delays because "one_time" forces the
3758 parent to be marked "delivered", so its unseen clone is never tried
3759 again. For this reason, Exim now forbids the simultaneous setting of
3762 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3763 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3764 entry if you want to know the details. The fix, however, neglected to
3765 consider the case when local delivery batching is involved. The test for
3766 "previously delivered" was not happening when checking to see if an
3767 address could be batched with a previous (undelivered) one; under
3768 certain circumstances this could lead to multiple deliveries to the same
3771 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3772 in its include files, and this causes problems building Exim.
3774 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3775 header_syntax) but Exim was just ignoring anything given after a slash.
3776 In particular, this caused confusion with an attempt to use "verify =
3777 reverse_host_lookup/defer_ok". An error is now given when options are
3778 supplied for verify items that do not have them. (Maybe reverse_host_
3779 lookup should have a defer_ok option, but that's a different point.)
3781 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3782 defined by RFC 821) to 2048, because there were problems with some AUTH
3783 commands, and RFC 1869 says the size should be increased for extended
3784 SMTP commands that take arguments.
3786 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3789 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3790 "unknown" error; now it says that the functionality isn't in the binary.
3792 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3793 an address' error message when a string expansion fails (syntax or
3794 whatever). Otherwise the password may appear in the log. Following change
3795 PH/42 below, there is no longer a chance of it appearing in a bounce
3798 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3800 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3801 of its addresses was ever tried. (Bugzilla bug #2.)
3803 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3804 the result incorrectly in the debug output. (It correctly added a newline
3805 to what was transported.)
3807 TF/01 Added $received_time.
3809 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3810 commented out examples of how to interface to a virus scanner and to
3811 SpamAssassin. Also added commented examples of av_scanner and
3812 spamd_address settings.
3814 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3815 and controls are allowed in which ACLs. There were a couple of minor
3816 errors. Some of the entries in the conditions table (which is a table of
3817 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3818 negation of where the condition IS allowed.
3820 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3822 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3823 header file does not have a version number, so I've had to invent a new
3824 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3825 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3826 radiusclient), but it was contributed by a Radius user.
3828 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3829 files or directories, for OpenSSL.
3831 PH/19 When an Exim process that is running as root has to create an Exim log
3832 file, it does so in a subprocess that runs as exim:exim so as to get the
3833 ownership right at creation (otherwise, other Exim processes might see
3834 the file with the wrong ownership). There was no test for failure of this
3835 fork() call, which would lead to the process getting stuck as it waited
3836 for a non-existent subprocess. Forks do occasionally fail when resources
3837 run out. I reviewed all the other calls to fork(); they all seem to check
3840 PH/20 When checking for unexpected SMTP input at connect time (before writing
3841 the banner), Exim was not dealing correctly with a non-positive return
3842 from the read() function. If the client had disconnected by this time,
3843 the result was a log entry for a synchronization error with an empty
3844 string after "input=" when read() returned zero. If read() returned -1
3845 (an event I could not check), uninitialized data bytes were printed.
3846 There were reports of junk text (parts of files, etc) appearing after
3849 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3851 PH/22 Added support for macro redefinition, and (re)definition in between
3852 driver and ACL definitions.
3854 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3855 forgetting to use the resulting value; it was using the unexpanded value.
3857 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3858 hadn't been configured. The fix is from Juergen Kreileder, who
3859 understands it better than I do:
3861 "Here's what I see happening with three configured cyrus_sasl
3862 authenticators configured (plain, login, cram-md5):
3864 On startup auth_cyrus_sasl_init() gets called for each of these.
3865 This means three calls to sasl_listmech() without a specified mech_list.
3866 => SASL tests which mechs of all available mechs actually work
3867 => three warnings about OTP not working
3868 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3870 With the patch, sasl_listmech() also gets called three times. But now
3871 SASL's mech_list option is set to the server_mech specified in the the
3872 authenticator. Or in other words, the answer from sasl_listmech()
3873 gets limited to just the mech you're testing for (which is different
3875 => the return list contains just 'plain' or 'login', 'cram-md5' or
3876 nothing depending on the value of ob->server_mech.
3878 I've just tested the patch: Authentication still works fine,
3879 unavailable mechs specified in the exim configuration are still
3880 caught, and the auth.log warnings about OTP are gone."
3882 PH/25 When debugging is enabled, the contents of the command line are added
3883 to the debugging output, even when log_selector=+arguments is not
3886 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3887 answer is "GNU", and only if the return is "GNU/something" is the answer
3890 PH/27 $acl_verify_message is now set immediately after the failure of a
3891 verification in an ACL, and so is available in subsequent modifiers. In
3892 particular, the message can be preserved by coding like this:
3894 warn !verify = sender
3895 set acl_m0 = $acl_verify_message
3897 Previously, $acl_verify_message was set only while expanding "message"
3898 and "log_message" when a very denied access.
3900 PH/28 Modified OS/os.c-Linux with
3902 -#ifndef OS_LOAD_AVERAGE
3903 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3905 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3906 nomenclature these days.)
3908 PH/29 Installed patch from the Sieve maintainer that adds the options
3909 sieve_useraddress and sieve_subaddress to the redirect router.
3911 PH/30 In these circumstances:
3912 . Two addresses routed to the same list of hosts;
3913 . First host does not offer TLS;
3914 . First host accepts first address;
3915 . First host gives temporary error to second address;
3916 . Second host offers TLS and a TLS session is established;
3917 . Second host accepts second address.
3918 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3919 and peerdn, if requested) that were in fact used only for the second
3922 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3923 attention to any local part prefix or suffix that was matched by the
3924 router that accepted the address. It now behaves in the same way as it
3925 does for delivery: the affixes are removed from the local part unless
3926 rcpt_include_affixes is set on the transport.
3928 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3929 timeout during the DATA phase of an incoming message.
3931 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3932 applied a patch sanctioned by the Sieve maintainer.
3934 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3935 the uid or gid is negative. A case of a negative gid caused this to be
3936 noticed. The fix allows for either to be negative.
3938 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3939 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3942 PH/36 The change PH/12 above was broken. Fixed it.
3944 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3945 the grounds that routing the same address twice would always produce the
3946 same answer. This might have been true once, but it is certainly no
3947 longer true now. Routing a child address may depend on the previous
3948 routing that produced that child. Some complicated redirection strategies
3949 went wrong when messages had multiple recipients, and made Exim's
3950 behaviour dependent on the order in which the addresses were given.
3952 I have moved the duplicate checking until after the routing is complete.
3953 Exim scans the addresses that are assigned to local and remote
3954 transports, and removes any duplicates. This means that more work will be
3955 done, as duplicates will always all be routed, but duplicates are
3956 presumably rare, so I don't expect this is of any significance.
3958 For deliveries to pipes, files, and autoreplies, the duplicate checking
3959 still happens during the routing process, since they are not going to be
3962 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3963 It corrects a timeout issue with spamd. This is Ian's comment: "The
3964 background is that sometimes spamd either never reads data from a
3965 connection it has accepted, or it never writes response data. The exiscan
3966 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3967 blindly assumes that writes won't block so it may never time out."
3969 PH/39 Allow G after quota size as well as K and M.
3971 PH/40 The value set for $authenticated_id in an authenticator may not contain
3972 binary zeroes or newlines because the value is written to log lines and
3973 to spool files. There was no check on this. Now the value is run through
3974 the string_printing() function so that such characters are converted to
3975 printable escape sequences.
3977 PH/41 $message_linecount is a new variable that contains the total number of
3978 lines in the message. Compare $body_linecount, which is the count for the
3981 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3982 bounce and delay warning messages, except in certain special cases, which
3985 (a) An SMTP error message from a remote host;
3986 (b) A message specified in a :fail: redirection;
3987 (c) A message specified in a "fail" command in a system filter;
3988 (d) A message specified in a FAIL return from the queryprogram router;
3989 (e) A message specified by the cannot_route_message router option.
3991 In these cases only, Exim does include the error details in bounce and
3992 warning messages. There are also a few cases where bland messages such
3993 as "unrouteable address" or "local delivery error" are given.
3995 PH/43 $value is now also set for the "else" part of a ${run expansion.
3997 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3998 being worked on, but at least Exim now implements the latest version to
4001 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4002 process to complete was treated as a delivery failure, a timeout while
4003 writing the message to the pipe was logged, but erroneously treated as a
4004 successful delivery. Such timeouts include transport filter timeouts. For
4005 consistency with the overall process timeout, these timeouts are now
4006 treated as errors, giving rise to delivery failures by default. However,
4007 there is now a new Boolean option for the pipe transport called
4008 timeout_defer, which, if set TRUE, converts the failures into defers for
4009 both kinds of timeout. A transport filter timeout is now identified in
4012 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4013 systems where "make" and "gmake" are different, calling "gmake" at top
4014 level broke things. I've arranged for the value of $(MAKE) to be passed
4015 from the Makefile to this script so that it can call the same version of
4019 A note about Exim versions 4.44 and 4.50
4020 ----------------------------------------
4022 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4023 changes of various kinds. As a consequence, a big documentation update was
4024 needed. This delayed the release for rather longer than seemed good, especially
4025 in the light of a couple of (minor) security issues. Therefore, the changes
4026 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4027 release. So 4.44 and 4.50 are in effect two different branches that both start
4030 I have left the 4.50 change log unchanged; it contains all the changes since
4031 4.43. The change log for 4.44 is below; many of its items are identical to
4032 those for 4.50. This seems to be the most sensible way to preserve the
4033 historical information.
4039 1. Minor wording change to the doc/README.SIEVE file.
4041 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4042 computation of the current number of files was incorrect.
4044 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4045 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4048 4. Give more explanation in the error message when the command for a transport
4049 filter fails to execute.
4051 5. There are several places where Exim runs a non-Exim command in a
4052 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4053 was being done only for the command run by the queryprogram router. It is
4054 now done for all such subprocesses. The other cases are: ${run, transport
4055 filters, and the commands run by the lmtp and pipe transports.
4057 6. Added CONFIGURE_GROUP build-time option.
4059 7. Some older OS have a limit of 256 on the maximum number of file
4060 descriptors. Exim was using setrlimit() to set 1000 as a large value
4061 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4062 systems. I've change it so that if it can't get 1000, it tries for 256.
4064 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4065 was an oversight, and furthermore, ever since the addition of extra
4066 controls (e.g. 4.43/32), the checks on when to allow different forms of
4067 "control" were broken. There should now be diagnostics for all cases when a
4068 control that does not make sense is encountered.
4070 9. Added the /retain_sender option to "control=submission".
4072 10. $recipients is now available in the predata ACL (oversight).
4074 11. Tidy the search cache before the fork to do a delivery from a message
4075 received from the command line. Otherwise the child will trigger a lookup
4076 failure and thereby defer the delivery if it tries to use (for example) a
4077 cached ldap connection that the parent has called unbind on.
4079 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4080 of $address_data from the recipient verification was clobbered by the
4081 sender verification.
4083 13. The value of address_data from a sender verification is now available in
4084 $sender_address_data in subsequent conditions in the ACL statement.
4086 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4088 15. Added a new option "connect=<time>" to callout options, to set a different
4091 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4092 was its contents. (It was OK if the option was not defined at all.)
4094 17. A "Completed" log line is now written for messages that are removed from
4095 the spool by the -Mrm option.
4097 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4098 information about exactly what failed.
4100 19. Added -dd to debug only the daemon process.
4102 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4103 handles timeouts, both on the server side and network timeouts. Renamed the
4104 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4106 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4107 It is now set to "smtps".
4109 22. $host_address is now set to the target address during the checking of
4110 ignore_target_hosts.
4112 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4113 being passed; this would have caused $sender_host_name to have been used if
4114 matching the list had actually called for a host name (not very likely,
4115 since this list is usually IP addresses). A host name is now passed as
4118 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4119 code that specifies a non-restarting handler (typically sigaction() in
4120 modern systems) in an attempt to fix a rare and obscure crash bug.
4122 25. Narrowed the window for a race in the daemon that could cause it to ignore
4123 SIGCHLD signals. This is not a major problem, because they are used only to
4124 wake it up if nothing else does.
4126 26. A malformed maildirsize file could cause Exim to calculate negative values
4127 for the mailbox size or file count. Odd effects could occur as a result.
4128 The maildirsize information is now recalculated if the size or filecount
4131 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4132 support for a long time. Removed HAVE_SYS_VFS_H.
4134 28. Installed the latest version of exipick from John Jetmore.
4136 29. In an address list, if the pattern was not a regular expression, an empty
4137 subject address (from a bounce message) matched only if the pattern was an
4138 empty string. Non-empty patterns were not even tested. This was the wrong
4139 because it is perfectly reasonable to use an empty address as part of a
4140 database query. An empty address is now tested by patterns that are
4141 lookups. However, all the other forms of pattern expect the subject to
4142 contain a local part and a domain, and therefore, for them, an empty
4143 address still always fails if the pattern is not itself empty.
4145 30. Exim went into a mad DNS loop when attempting to do a callout where the
4146 host was specified on an smtp transport, and looking it up yielded more
4147 than one IP address.
4149 31. Re-factored the code for checking spool and log partition space into a
4150 function that finds that data and another that does the check. The former
4151 is then used to implement four new variables: $spool_space, $log_space,
4152 $spool_inodes, and $log_inodes.
4154 32. The RFC2047 encoding function was originally intended for short strings
4155 such as real names; it was not keeping to the 75-character limit for
4156 encoded words that the RFC imposes. It now respects the limit, and
4157 generates multiple encoded words if necessary. To be on the safe side, I
4158 have increased the buffer size for the ${rfc2047: expansion operator from
4161 33. It is now permitted to omit both strings after an "if" condition; if the
4162 condition is true, the result is "true". As before, when the second string
4163 is omitted, a false condition yields an empty string. This makes it less
4164 cumbersome to write custom ACL and router conditions.
4166 34. Failure to deliver a bounce message always caused it to be frozen, even if
4167 there was an errors_to setting on the router. The errors_to setting is now
4170 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4171 canonical form (fully expanded) before being placed in
4172 $sender_host_address.
4174 36. The table in the code that translates DNS record types into text (T_A to
4175 "A" for instance) was missing entries for NS and CNAME. It is just possible
4176 that this could have caused confusion if both these types were looked up
4177 for the same domain, because the text type is used as part of Exim's
4178 per-process caching. But the chance of anyone hitting this buglet seems
4181 37. The dnsdb lookup has been extended in a number of ways.
4183 (1) There is a new type, "zns", which walks up the domain tree until it
4184 finds some nameserver records. It should be used with care.
4186 (2) There is a new type, "mxh", which is like "mx" except that it returns
4187 just the host names, not the priorities.
4189 (3) It is now possible to give a list of domains (or IP addresses) to be
4190 looked up. The behaviour when one of the lookups defers can be
4191 controlled by a keyword.
4193 (4) It is now possible to specify the separator character for use when
4194 multiple records are returned.
4196 38. The dnslists ACL condition has been extended: it is now possible to supply
4197 a list of IP addresses and/or domains to be looked up in a particular DNS
4200 39. Added log_selector=+queue_time_overall.
4202 40. When running the queue in the test harness, wait just a tad after forking a
4203 delivery process, to get repeatability of debugging output.
4205 41. Include certificate and key file names in error message when GnuTLS fails
4206 to set them up, because the GnuTLS error message doesn't include the name
4207 of the failing file when there is a problem reading it.
4209 42. Allow both -bf and -bF in the same test run.
4211 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4213 44. The "Exiscan patch" is now merged into the mainline Exim source.
4215 45. Sometimes the final signoff response after QUIT could fail to get
4216 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4217 < 0 before doing a fflush(). This bug looks as though it goes back to the
4218 introduction of TLS in release 3.20, but "sometimes" must have been rare
4219 because the tests only now provoked it.
4221 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4222 (this can affect the format of dates).
4224 47. exim_tidydb, when checking for the continued existence of a message for
4225 which it has found a message-specific retry record, was not finding
4226 messages that were in split spool directories. Consequently, it was
4227 deleting retry records that should have stayed in existence.
4229 48. Steve fixed some bugs in eximstats.
4231 49. The SPA authentication driver was not abandoning authentication and moving
4232 on to the next authenticator when an expansion was forced to fail,
4233 contradicting the general specification for all authenticators. Instead it
4234 was generating a temporary error. It now behaves as specified.
4236 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4237 (the order specifies the preference for clients). The order is now AES256,
4238 AES128, 3DES, ARCFOUR128.
4240 51. Small patch to Sieve code - explicitly set From: when generating an
4243 52. Exim crashed if a remote delivery caused a very long error message to be
4244 recorded - for instance if somebody sent an entire SpamAssassin report back
4245 as a large number of 550 error lines. This bug was coincidentally fixed by
4246 increasing the size of one of Exim's internal buffers (big_buffer) that
4247 happened as part of the Exiscan merge. However, to be on the safe side, I
4248 have made the code more robust (and fixed the comments that describe what
4251 53. Now that there can be additional text after "Completed" in log lines (if
4252 the queue_time_overall log selector is set), a one-byte patch to exigrep
4253 was needed to allow it to recognize "Completed" as not the last thing in
4256 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4257 patch that reportedly fixes this has been added. I am not expert enough to
4258 create a test for it. This is what the patch creator wrote:
4260 "I found a little strange behaviour of ldap code when working with
4261 Windows 2003 AD Domain, where users was placed in more than one
4262 Organization Units. When I tried to give exim partial DN, the exit code
4263 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4264 But simultaneously result of request was absolutely normal ldap result,
4265 so I produce this patch..."
4267 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4268 REFERENCE, so I have modified the code to exclude the patch when that macro
4271 55. Some experimental protocols are using DNS PTR records for new purposes. The
4272 keys for these records are domain names, not reversed IP addresses. The
4273 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4274 leaves it alone. Component reversal etc. now happens only for IP addresses.
4277 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4279 57. Double the size of the debug message buffer (to 2048) so that more of very
4280 long debug lines gets shown.
4282 58. The exicyclog utility now does better if the number of log files to keep
4283 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4285 59. Two changes related to the smtp_active_hostname option:
4287 (1) $smtp_active_hostname is now available as a variable.
4288 (2) The default for smtp_banner uses $smtp_active_hostname instead
4289 of $primary_hostname.
4291 60. The host_aton() function is supposed to be passed a string that is known
4292 to be a valid IP address. However, in the case of IPv6 addresses, it was
4293 not checking this. This is a hostage to fortune. Exim now panics and dies
4294 if the condition is not met. A case was found where this could be provoked
4295 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4296 components; fortuitously, this particular loophole had already been fixed
4297 by change 4.50/55 above.
4299 If there are any other similar loopholes, the new check in host_aton()
4300 itself should stop them being exploited. The report I received stated that
4301 data on the command line could provoke the exploit when Exim was running as
4302 exim, but did not say which command line option was involved. All I could
4303 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4304 running as the user.
4307 61. There was a buffer overflow vulnerability in the SPA authentication code
4308 (which came originally from the Samba project). I have added a test to the
4309 spa_base64_to_bits() function which I hope fixes it.
4312 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4313 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4315 63. The daemon start-up calls getloadavg() while still root for those OS that
4316 need the first call to be done as root, but it missed one case: when
4317 deliver_queue_load_max is set with deliver_drop_privilege. This is
4318 necessary for the benefit of the queue runner, because there is no re-exec
4319 when deliver_drop_privilege is set.
4321 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4322 This has been fixed.
4324 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4325 was in use, was not putting the data itself into the right store pool;
4326 consequently, it could be overwritten for a subsequent message in the same
4327 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4330 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4332 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4333 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4334 the function were treating the return as a boolean value, which happened to
4335 work because 0=false and not-0=true, but is not correct code.
4337 68. The host_aton() function was not handling scoped IPv6 addresses (those
4338 with, for example, "%eth0" on the end) correctly.
4340 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4341 negated items (that is, ~something) in unsigned ints. Some compilers
4342 apparently mutter when there is no cast.
4344 70. If an address verification called from an ACL failed, and did not produce a
4345 user-specific message (i.e. there was only a "system" message), nothing was
4346 put in $acl_verify_message. In this situation, it now puts the system
4349 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4350 session; change 4.31/43 added the unwanted input to the log line - except
4351 that it did not do this in the start of session case. It now does.
4353 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4354 This is wrong and can cause the other end to generate a synchronization
4355 error if it is another Exim or anything else that does the synchronization
4356 check. A QUIT command is no longer sent after a timeout.
4358 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4359 during host lookups.
4361 74. The defer_ok option of callout verification was not working if it was used
4362 when verifying addresses in header lines, that is, for this case:
4364 verify = header_sender/callout=defer_ok
4366 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4367 those file descriptors could be used for SMTP connections. If anything
4368 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4369 could be sent to the SMTP client, causing chaos. The daemon now opens
4370 stdin, stdout, and stderr to /dev/null when it puts itself into the
4373 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4374 log by default. The user can override this with suitable Perl magic.
4376 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4377 the log message when discard triggers, was not working for the DATA ACL or
4378 for the non-SMTP ACL.
4380 78. Error message wording change in sieve.c.
4382 79. If smtp_accept_max_per_host was set, the number of connections could be
4383 restricted to fewer than expected, because the daemon was trying to set up
4384 a new connection before checking whether the processes handling previous
4385 connections had finished. The check for completed processes is now done
4386 earlier. On busy systems, this bug wouldn't be noticed because something
4387 else would have woken the daemon, and it would have reaped the completed
4390 80. If a message was submitted locally by a user whose login name contained one
4391 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4392 It caused a spool format error. I have fixed the spool reading code. A
4393 related problem was that the "from" clause in the Received: line became
4394 illegal because of the space(s). It is now covered by ${quote_local_part.
4396 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4399 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4401 83. Patch from Sieve maintainer to fix unterminated string problem in
4402 "vacation" handling.
4404 84. Some minor changes to the Linux configuration files to help with other
4405 OS variants using glibc.
4407 85. One more patch for Sieve to update vacation handling to latest spec.
4410 ----------------------------------------------------
4411 See the note above about the 4.44 and 4.50 releases.
4412 ----------------------------------------------------
4418 1. Change 4.43/35 introduced a bug that caused file counts to be
4419 incorrectly computed when quota_filecount was set in an appendfile
4422 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4423 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4426 3. Give more explanation in the error message when the command for a transport
4427 filter fails to execute.
4429 4. There are several places where Exim runs a non-Exim command in a
4430 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4431 was being done only for the command run by the queryprogram router. It is
4432 now done for all such subprocesses. The other cases are: ${run, transport
4433 filters, and the commands run by the lmtp and pipe transports.
4435 5. Some older OS have a limit of 256 on the maximum number of file
4436 descriptors. Exim was using setrlimit() to set 1000 as a large value
4437 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4438 systems. I've change it so that if it can't get 1000, it tries for 256.
4440 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4441 was an oversight, and furthermore, ever since the addition of extra
4442 controls (e.g. 4.43/32), the checks on when to allow different forms of
4443 "control" were broken. There should now be diagnostics for all cases when a
4444 control that does not make sense is encountered.
4446 7. $recipients is now available in the predata ACL (oversight).
4448 8. Tidy the search cache before the fork to do a delivery from a message
4449 received from the command line. Otherwise the child will trigger a lookup
4450 failure and thereby defer the delivery if it tries to use (for example) a
4451 cached ldap connection that the parent has called unbind on.
4453 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4454 of $address_data from the recipient verification was clobbered by the
4455 sender verification.
4457 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4458 was its contents. (It was OK if the option was not defined at all.)
4460 11. A "Completed" log line is now written for messages that are removed from
4461 the spool by the -Mrm option.
4463 12. $host_address is now set to the target address during the checking of
4464 ignore_target_hosts.
4466 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4467 being passed; this would have caused $sender_host_name to have been used if
4468 matching the list had actually called for a host name (not very likely,
4469 since this list is usually IP addresses). A host name is now passed as
4472 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4473 code that specifies a non-restarting handler (typically sigaction() in
4474 modern systems) in an attempt to fix a rare and obscure crash bug.
4476 15. Narrowed the window for a race in the daemon that could cause it to ignore
4477 SIGCHLD signals. This is not a major problem, because they are used only to
4478 wake it up if nothing else does.
4480 16. A malformed maildirsize file could cause Exim to calculate negative values
4481 for the mailbox size or file count. Odd effects could occur as a result.
4482 The maildirsize information is now recalculated if the size or filecount
4485 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4486 support for a long time. Removed HAVE_SYS_VFS_H.
4488 18. Updated exipick to current release from John Jetmore.
4490 19. Allow an empty sender to be matched against a lookup in an address list.
4491 Previously the only cases considered were a regular expression, or an
4494 20. Exim went into a mad DNS lookup loop when doing a callout where the
4495 host was specified on the transport, if the DNS lookup yielded more than
4498 21. The RFC2047 encoding function was originally intended for short strings
4499 such as real names; it was not keeping to the 75-character limit for
4500 encoded words that the RFC imposes. It now respects the limit, and
4501 generates multiple encoded words if necessary. To be on the safe side, I
4502 have increased the buffer size for the ${rfc2047: expansion operator from
4505 22. Failure to deliver a bounce message always caused it to be frozen, even if
4506 there was an errors_to setting on the router. The errors_to setting is now
4509 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4510 canonical form (fully expanded) before being placed in
4511 $sender_host_address.
4513 24. Updated eximstats to version 1.33
4515 25. Include certificate and key file names in error message when GnuTLS fails
4516 to set them up, because the GnuTLS error message doesn't include the name
4517 of the failing file when there is a problem reading it.
4519 26. Expand error message when OpenSSL has problems setting up cert/key files.
4522 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4523 (this can affect the format of dates).
4525 28. exim_tidydb, when checking for the continued existence of a message for
4526 which it has found a message-specific retry record, was not finding
4527 messages that were in split spool directories. Consequently, it was
4528 deleting retry records that should have stayed in existence.
4530 29. eximstats updated to version 1.35
4531 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4532 1.35 - bugfix such that pie charts by volume are generated correctly
4534 30. The SPA authentication driver was not abandoning authentication and moving
4535 on to the next authenticator when an expansion was forced to fail,
4536 contradicting the general specification for all authenticators. Instead it
4537 was generating a temporary error. It now behaves as specified.
4539 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4540 (the order specifies the preference for clients). The order is now AES256,
4541 AES128, 3DES, ARCFOUR128.
4543 31. Small patch to Sieve code - explicitly set From: when generating an
4546 32. Exim crashed if a remote delivery caused a very long error message to be
4547 recorded - for instance if somebody sent an entire SpamAssassin report back
4548 as a large number of 550 error lines. This bug was coincidentally fixed by
4549 increasing the size of one of Exim's internal buffers (big_buffer) that
4550 happened as part of the Exiscan merge. However, to be on the safe side, I
4551 have made the code more robust (and fixed the comments that describe what
4554 33. Some experimental protocols are using DNS PTR records for new purposes. The
4555 keys for these records are domain names, not reversed IP addresses. The
4556 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4557 leaves it alone. Component reversal etc. now happens only for IP addresses.
4560 34. The host_aton() function is supposed to be passed a string that is known
4561 to be a valid IP address. However, in the case of IPv6 addresses, it was
4562 not checking this. This is a hostage to fortune. Exim now panics and dies
4563 if the condition is not met. A case was found where this could be provoked
4564 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4565 components; fortuitously, this particular loophole had already been fixed
4566 by change 4.50/55 or 4.44/33 above.
4568 If there are any other similar loopholes, the new check in host_aton()
4569 itself should stop them being exploited. The report I received stated that
4570 data on the command line could provoke the exploit when Exim was running as
4571 exim, but did not say which command line option was involved. All I could
4572 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4573 running as the user.
4576 35. There was a buffer overflow vulnerability in the SPA authentication code
4577 (which came originally from the Samba project). I have added a test to the
4578 spa_base64_to_bits() function which I hope fixes it.
4581 36. The daemon start-up calls getloadavg() while still root for those OS that
4582 need the first call to be done as root, but it missed one case: when
4583 deliver_queue_load_max is set with deliver_drop_privilege. This is
4584 necessary for the benefit of the queue runner, because there is no re-exec
4585 when deliver_drop_privilege is set.
4587 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4588 was in use, was not putting the data itself into the right store pool;
4589 consequently, it could be overwritten for a subsequent message in the same
4590 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4593 38. Sometimes the final signoff response after QUIT could fail to get
4594 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4595 < 0 before doing a fflush(). This bug looks as though it goes back to the
4596 introduction of TLS in release 3.20, but "sometimes" must have been rare
4597 because the tests only now provoked it.
4603 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4604 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4605 Now it returns an integer. A number of calls were still expecting a T/F
4606 return. Fortuitously, in all cases, the tests worked in OK situations,
4607 which is the norm. However, things would have gone wrong on any write
4608 failures on the smtp file descriptor. This function is used when sending
4609 messages over SMTP and also when doing verify callouts.
4611 2. When Exim is called to do synchronous delivery of a locally submitted
4612 message (the -odf or -odi options), it no longer closes stderr before doing
4615 3. Implemented the mua_wrapper option.
4617 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4619 5. Implemented the functions header_remove(), header_testname(),
4620 header_add_at_position(), and receive_remove_recipient(), and exported them
4623 6. If an ACL "warn" statement specified the addition of headers, Exim already
4624 inserted X-ACL-Warn: at the start if there was no header name. However, it
4625 was not making this test for the second and subsequent header lines if
4626 there were newlines in the string. This meant that an invalid header could
4627 be inserted if Exim was badly configured.
4629 7. Allow an ACL "warn" statement to add header lines at the start or after all
4630 the Received: headers, as well as at the end.
4632 8. Added the rcpt_4xx retry error code.
4634 9. Added postmaster_mailfrom=xxx to callout verification option.
4636 10. Added mailfrom=xxxx to the callout verification option, for verify=
4639 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4640 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4642 12. Inserted some casts to stop certain compilers warning when using pointer
4643 differences as field lengths or precisions in printf-type calls (mostly
4644 affecting debugging statements).
4646 13. Added optional readline() support for -be (dynamically loaded).
4648 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4649 same clock tick as a message's arrival, so that its received time was the
4650 same as the "first fail" time on the retry record, and that message
4651 remained on the queue past the ultimate address timeout, every queue runner
4652 would try a delivery (because it was past the ultimate address timeout) but
4653 after another failure, the ultimate address timeout, which should have then
4654 bounced the address, did not kick in. This was a "< instead of <=" error;
4655 in most cases the first failure would have been in the next clock tick
4656 after the received time, and all would be well.
4658 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4659 being recognized when the domain list was tested by the match_domain
4660 condition in an expansion string.
4662 16. Added the ${str2b64: operator.
4664 17. Exim was always calling setrlimit() to set a large limit for the number of
4665 processes, without checking whether the existing limit was already
4666 adequate. (It did check for the limit on file descriptors.) Furthermore,
4667 errors from getrlimit() and setrlimit() were being ignored. Now they are
4668 logged to the main and panic logs, but Exim does carry on, to try to do its
4669 job under whatever limits there are.
4671 18. Imported PCRE 5.0.
4673 19. Trivial typo in log message " temporarily refused connection" (the leading
4676 20. If the log selector return_path_on_delivery was set and an address was
4677 redirected to /dev/null, the delivery process crashed because it assumed
4678 that a return path would always be set for a "successful" delivery. In this
4679 case, the whole delivery is bypassed as an optimization, and therefore no
4682 21. Internal re-arrangement: the function for sending a challenge and reading
4683 a response while authentication was assuming a zero-terminated challenge
4684 string. It's now changed to take a pointer and a length, to allow for
4685 binary data in such strings.
4687 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4689 23. Exim was not respecting finduser_retries when seeking the login of the
4690 uid under which it was called; it was always trying 10 times. (The default
4691 setting of finduser_retries is zero.) Also, it was sleeping after the final
4692 failure, which is pointless.
4694 24. Implemented tls_on_connect_ports.
4696 25. Implemented acl_smtp_predata.
4698 26. If the domain in control=submission is set empty, Exim assumes that the
4699 authenticated id is a complete email address when it generates From: or
4700 Sender: header lines.
4702 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4703 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4704 chown and chgrp in /bin and hostname in /usr/bin.
4706 28. Exim was keeping the "process log" file open after each use, just as it
4707 does for the main log. This opens the possibility of it remaining open for
4708 long periods when the USR1 signal hits a daemon. Occasional processlog
4709 errors were reported, that could have been caused by this. Anyway, it seems
4710 much more sensible not to leave this file open at all, so that is what now
4713 29. The long-running daemon process does not normally write to the log once it
4714 has entered its main loop, and it closes the log before doing so. This is
4715 so that log files can straightforwardly be renamed and moved. However,
4716 there are a couple of unusual error situations where the daemon does write
4717 log entries, and I had neglected to close the log afterwards.
4719 30. The text of an SMTP error response that was received during a remote
4720 delivery was being truncated at 512 bytes. This is too short for some of
4721 the long messages that one sometimes sees. I've increased the limit to
4724 31. It is now possible to make retry rules that apply only when a message has a
4725 specific sender, in particular, an empty sender.
4727 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4728 it possible to be selective about when SMTP synchronization is enforced.
4730 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4732 32. Implemented hosts_connection_nolog.
4734 33. Added an ACL for QUIT.
4736 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4739 35. Added mailbox_size and mailbox_filecount to appendfile.
4741 36. Added control = no_multiline_responses to ACLs.
4743 37. There was a bug in the logic of the code that waits for the clock to tick
4744 in the case where the clock went backwards by a substantial amount such
4745 that the microsecond fraction of "now" was more than the microsecond
4746 fraction of "then" (but the whole seconds number was less).
4748 38. Added support for the libradius Radius client library this is found on
4749 FreeBSD (previously only the radiusclient library was supported).
4755 1. When certain lookups returned multiple values in the form name=value, the
4756 quoting of the values was not always being done properly. Specifically:
4757 (a) If the value started with a double quote, but contained no whitespace,
4759 (b) If the value contained whitespace other than a space character (i.e.
4760 tabs or newlines or carriage returns) it was not quoted.
4761 This fix has been applied to the mysql and pgsql lookups by writing a
4762 separate quoting function and calling it from the lookup code. The fix
4763 should probably also be applied to nisplus, ibase and oracle lookups, but
4764 since I cannot test any of those, I have not disturbed their existing code.
4766 2. A hit in the callout cache for a specific address caused a log line with no
4767 reason for rejecting RCPT. Now it says "Previous (cached) callout
4768 verification failure".
4770 3. There was an off-by-one bug in the queryprogram router. An over-long
4771 return line was truncated at 256 instead of 255 characters, thereby
4772 overflowing its buffer with the terminating zero. As well as fixing this, I
4773 have increased the buffer size to 1024 (and made a note to document this).
4775 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4776 when Exim is waiting for an SMTP response from a remote server, Exim
4777 restarts its select() call on the socket, thereby resetting its timeout.
4778 This is not a problem when such interrupts are rare. Somebody set up a cron
4779 job to run exiwhat every 2 minutes, which is less than the normal select()
4780 timeout (5 or 10 minutes). This meant that the select() timeout never
4781 kicked in because it was always reset. I have fixed this by comparing the
4782 time when an interrupt arrives with the time at the start of the first call
4783 to select(). If more time than the timeout has elapsed, the interrupt is
4784 treated as a timeout.
4786 5. Some internal re-factoring in preparation for the addition of Sieve
4787 extensions (by MH). In particular, the "personal" test is moved to a
4788 separate function, and given an option for scanning Cc: and Bcc: (which is
4789 not set for Exim filters).
4791 6. When Exim created an email address using the login of the caller as the
4792 local part (e.g. when creating a From: or Sender: header line), it was not
4793 quoting the local part when it contained special characters such as @.
4795 7. Installed new OpenBSD configuration files.
4797 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4798 try to make them clearer.
4800 9. Callout options, other than the timeout value, were being ignored when
4801 verifying sender addresses in header lines. For example, when using
4803 verify = header_sender/callout=no_cache
4805 the cache was (incorrectly) being used.
4807 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4808 only the Cygwin environment.
4810 11. When return_path_on_delivery was set as a log selector, if different remote
4811 addresses in the same message used different return paths and parallel
4812 remote delivery occurred, the wrong values would sometimes be logged.
4813 (Whenever a remote delivery process finished, the return path value from
4814 the most recently started remote delivery process was logged.)
4816 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4817 lines when AUTH and/or TLS are in use. This is the "received protocol"
4818 field. Exim used to use "asmtp" for authenticated SMTP, without any
4819 indication (in the protocol name) for TLS use. Now it follows the RFC and
4820 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4821 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4822 names appear in log lines as well as in Received: header lines.
4824 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4825 extensions, and comparison tests, and to fix some bugs.
4827 14. Changes to the "personal" filter test:
4829 (1) The test was buggy in that it was just doing the equivalent of
4830 "contains" tests on header lines. For example, if a user's address was
4831 anne@some.where, the "personal" test would incorrectly be true for
4833 To: susanne@some.where
4835 This test is now done by extracting each address from the header in turn,
4836 and checking the entire address. Other tests that are part of "personal"
4837 are now done using regular expressions (for example, to check local parts
4838 of addresses in From: header lines).
4840 (2) The list of non-personal local parts in From: addresses has been
4841 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4842 taken from the Sieve specification recommendations.
4844 (3) If the message contains any header line starting with "List-" it is
4845 treated as non-personal.
4847 (4) The test for "circular" in the Subject: header line has been removed
4848 because it now seems ill-conceived.
4850 15. Minor typos in src/EDITME comments corrected.
4852 16. Installed latest exipick from John Jetmore.
4854 17. If headers_add on a router specified a text string that was too long for
4855 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4856 of string_sprintf() is now avoided.
4858 18. $message_body_size was not set (it was always zero) when running the DATA
4859 ACL and the local_scan() function.
4861 19. For the "mail" command in an Exim filter, no default was being set for
4862 the once_repeat time, causing a random time value to be used if "once" was
4863 specified. (If the value happened to be <= 0, no repeat happened.) The
4864 default is now 0s, meaning "never repeat". The "vacation" command was OK
4865 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4866 (I found it when inspecting the code).
4868 20. There is now an overall timeout for performing a callout verification. It
4869 defaults to 4 times the callout timeout, which applies to individual SMTP
4870 commands during the callout. The overall timeout applies when there is more
4871 than one host that can be tried. The timeout is checked before trying the
4872 next host. This prevents very long delays if there are a large number of
4873 hosts and all are timing out (e.g. when the network connections are timing
4874 out). The value of the overall timeout can be changed by specifying an
4875 additional sub-option for "callout", called "maxwait". For example:
4877 verify = sender/callout=5s,maxwait=20s
4879 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4880 to the end before writing, but this should make it even safer).
4882 22. Exim was forgetting that it had advertised PIPELINING for the second and
4883 subsequent messages on an SMTP connection. It was also not resetting its
4884 memory on STARTTLS and an internal HELO.
4886 23. When Exim logs an SMTP synchronization error within a session, it now
4887 records whether PIPELINING has been advertised or not.
4889 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4890 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4891 rather than long int.
4893 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4895 26. Added the never_mail option to autoreply.
4901 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4902 crash if the getsockname() call failed; this can happen if a connection is
4903 closed very soon after it is established. The problem was simply in the
4904 order in which certain operations were done, causing Exim to try to write
4905 to the SMTP stream before it had set up the file descriptor. The bug has
4906 been fixed by making things happen in the correct order.
4912 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4913 before the connection was closed, thus losing the rejection response.
4915 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4916 some early Solaris releases, but causes trouble in current releases where
4917 socklen_t is defined.
4919 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4922 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4925 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4926 that releasing the top of it at the end releases what was used for sub-
4927 expansions (unless the block got too big). However, discard this block if
4928 the first thing is a variable or header, so that we can use its block when
4929 it is dynamic (useful for very large $message_headers, for example).
4931 6. Lookups now cache *every* query, not just the most recent. A new, separate
4932 store pool is used for this. It can be recovered when all lookup caches are
4933 flushed. Lookups now release memory at the end of their result strings.
4934 This has involved some general refactoring of the lookup sources.
4936 7. Some code has been added to the store_xxx() functions to reduce the amount
4937 of flapping under certain conditions.
4939 8. log_incoming_interface used to affect only the <= reception log lines. Now
4940 it causes the local interface and port to be added to several more SMTP log
4941 lines, for example "SMTP connection from", and rejection lines.
4943 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4945 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4947 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4948 could be overwritten at the end of the current message (or the start of a
4949 new message if it was set in a HELO ACL). The value is now preserved for
4950 the duration of the SMTP connection.
4952 12. If a transport had a headers_rewrite setting, and a matching header line
4953 contained an unqualified address, that address was qualified, even if it
4954 did not match any rewriting rules. The underlying bug was that the values
4955 of the flags that permit the existence of unqualified sender and recipient
4956 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4957 non-local messages, and by -bnq for local messages) were not being
4958 preserved with the message after it was received.
4960 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4961 "next input=" as part of the text comprising the host identity instead of
4962 the correct text. The code was using the same buffer for two different
4963 strings. However, depending on which order the printing function evaluated
4964 its arguments, the bug did not always show up. Under Linux, for example, my
4965 test suite worked just fine.
4967 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4968 doesn't work with some older versions of Perl. It has been changed to "my",
4969 which in any case is probably the better facility to use.
4971 15. A really picky compiler found some instances of statements for creating
4972 error messages that either had too many or two few arguments for the format
4975 16. The size of the buffer for calls to the DNS resolver has been increased
4976 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4977 for addresses that have a lot of PTR records. This alleviates a problem; it
4978 does not fully solve it.
4980 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4981 buffer now truncates the list and logs the incident, which is the same
4982 action as happens when Exim is looking up a host name and its aliases.
4983 Previously in this situation something unpredictable would happen;
4984 sometimes it was "internal error: store_reset failed".
4986 18. If a server dropped the connection unexpectedly when an Exim client was
4987 using GnuTLS and trying to read a response, the client delivery process
4988 crashed while trying to generate an error log message.
4990 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4991 string, for example:
4993 warn message = H1: something\nH2: something
4995 the text was added as a single header line from Exim's point of view
4996 though it ended up OK in the delivered message. However, searching for the
4997 second and subsequent header lines using $h_h2: did not work. This has been
4998 fixed. Similarly, if a system filter added multiple headers in this way,
4999 the routers could not see them.
5001 20. Expanded the error message when iplsearch is called with an invalid key to
5002 suggest using net-iplsearch in a host list.
5004 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5005 ACLs are no longer actually imposed (and a message to that effect is
5008 22. If a "gecos" field in a passwd entry contained escaped characters, in
5009 particular, if it contained a \" sequence, Exim got it wrong when building
5010 a From: or a Sender: header from that name. A second bug also caused
5011 incorrect handling when an unquoted " was present following a character
5012 that needed quoting.
5014 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5015 was not being matched caselessly.
5017 24. Arranged for all hyphens in the exim.8 source to be escaped with
5020 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5021 properly. Recipient callout cache records were still being keyed to include
5022 the sender, even when use_sender was set false. This led to far more
5023 callouts that were necessary. The sender is no longer included in the key
5024 when use_sender is false.
5026 26. Added "control = submission" modifier to ACLs.
5028 27. Added the ${base62d: operator to decode base 62 numbers.
5030 28. dnsdb lookups can now access SRV records.
5032 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5033 the configuration file.
5035 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5036 (-v) mode. This makes the output for a verbose queue run more intelligible.
5038 31. Added a use_postmaster feature to recipient callouts.
5040 32. Added the $body_zerocount variable, containing the number of binary zero
5041 bytes in the message body.
5043 33. The time of last modification of the "new" subdirectory is now used as the
5044 "mailbox time last read" when there is a quota error for a maildir
5047 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5049 35. Added +ignore_unknown as a special item in host lists.
5051 36. Code for decoding IPv6 addresses in host lists is now included, even if
5052 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5053 address was recognized as an IP address, but was then not correctly decoded
5054 into binary, causing unexpected and incorrect effects when compared with
5061 1. Very minor rewording of debugging text in manualroute to say "list of
5062 hosts" instead of "hostlist".
5064 2. If verify=header_syntax was set, and a header line with an unqualified
5065 address (no domain) and a large number of spaces between the end of the
5066 name and the colon was received, the reception process suffered a buffer
5067 overflow, and (when I tested it) crashed. This was caused by some obsolete
5068 code that should have been removed. The fix is to remove it!
5070 3. When running in the test harness, delay a bit after writing a bounce
5071 message to get a bit more predictability in the log output.
5073 4. Added a call to search_tidyup() just before forking a reception process. In
5074 theory, someone could use a lookup in the expansion of smtp_accept_max_
5075 per_host which, without the tidyup, could leave open a database connection.
5077 5. Added the variables $recipient_data and $sender_data which get set from a
5078 lookup success in an ACL "recipients" or "senders" condition, or a router
5079 "senders" option, similar to $domain_data and $local_part_data.
5081 6. Moved the writing of debug_print from before to after the "senders" test
5084 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5085 problems for message scanning, either using a data ACL, or using
5086 local_scan() because the Received: header was not generated till after they
5087 were called (in order to set the time as the time of reception completion).
5088 I have revised the way this works. The header is now generated after the
5089 body is received, but before the ACL or local_scan() are called. After they
5090 are run, the timestamp in the header is updated.
5096 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5097 before starting a queue runner without re-exec. This happened only when
5098 deliver_drop_privilege was set or when the Exim user was set to root. The
5099 effect of the bug was that timeouts during subsequent deliveries caused
5100 crashes instead of being properly handled. The handler is now left at its
5101 default (and expected) setting.
5103 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5104 message, again when deliver_drop_privilege is set or Exim is run as root.
5105 The bug described in (1) was not present in this case, but the tidying up
5106 of the other signals was missing. I have made the two cases consistent.
5108 3. The ignore_target_hosts setting on a manualroute router was being ignored
5109 for hosts that were looked up using the /MX notation.
5111 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5114 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5115 operated on the sender address. After changing the $sender_address to <>
5116 for the sender address verify, Exim was re-instated it as the original
5117 (before rewriting) address, but remembering that it had rewritten it, so it
5118 wasn't rewriting it again. This bug also had the effect of breaking the
5119 sender address verification caching when the sender address was rewritten.
5121 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5122 This has been changed so that if the ip literal address matches
5123 ignore_target_hosts, the router declines.
5125 7. Added expansion conditions match_domain, match_address, and match_local_
5126 part (NOT match_host).
5128 8. The placeholder for the Received: header didn't have a length field set.
5130 9. Added code to Exim itself and to exim_lock to test for a specific race
5131 condition that could lead to file corruption when using MBX delivery. The
5132 issue is with the lockfile that is created in /tmp. If this file is removed
5133 after a process has opened it but before that process has acquired a lock,
5134 there is the potential for a second process to recreate the file and also
5135 acquire a lock. This could lead to two Exim processes writing to the file
5136 at the same time. The added code performs the same test as UW imapd; it
5137 checks after acquiring the lock that its file descriptor still refers to
5138 the same named file.
5140 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5141 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5144 11. Added the smtp_active_hostname option. If used, this will typically be made
5145 to depend on the incoming interface address. Because $interface_address is
5146 not set up until the daemon has forked a reception process, error responses
5147 that can happen earlier (such as "too many connections") no longer contain
5150 12. If an expansion in a condition on a "warn" statement fails because a lookup
5151 defers, the "warn" statement is abandoned, and the next ACL statement is
5152 processed. Previously this caused the whole ACL to be aborted.
5154 13. Added the iplsearch lookup type.
5156 14. Added ident_timeout as a log selector.
5158 15. Added tls_certificate_verified as a log selector.
5160 16. Added a global option tls_require_ciphers (compare the smtp transport
5161 option of the same name). This controls incoming TLS connections.
5163 17. I finally figured out how to make tls_require_ciphers do a similar thing
5164 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5165 before starting the TLS session.
5167 18. Tabs are now shown as \t in -bP output.
5169 19. If the log selector return_path_on_delivery was set, Exim crashed when
5170 bouncing a message because it had too many Received: header lines.
5172 20. If two routers both had headers_remove settings, and the first one included
5173 a superfluous trailing colon, the final name in the first list and the
5174 first name in the second list were incorrectly joined into one item (with a
5175 colon in the middle).
5181 1. Added -C and -D options to the exinext utility, mainly to make it easier
5182 to include in the automated testing, but these could be helpful when
5183 multiple configurations are in use.
5185 2. The exinext utility was not formatting the output nicely when there was
5186 an alternate port involved in the retry record key, nor when there was a
5187 message id as well (for retries that were specific to a specific message
5188 and a specific host). It was also confused by IPv6 addresses, because of
5189 the additional colons they contain. I have fixed the IPv4 problem, and
5190 patched it up to do a reasonable job for IPv6.
5192 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5193 delivery, the log line now contains "pipelined" if PIPELINING was used.
5195 4. An SMTP transport process used to panic and die if the bind() call to set
5196 an explicit outgoing interface failed. This has been changed; it is now
5197 treated in the same way as a connect() failure.
5199 5. A reference to $sender_host_name in the part of a conditional expansion
5200 that was being skipped was still causing a DNS lookup. This no longer
5203 6. The def: expansion condition was not recognizing references to header lines
5204 that used bh_ and bheader_.
5206 7. Added the _cache feature to named lists.
5208 8. The code for checking quota_filecount in the appendfile transport was
5209 allowing one more file than it should have been.
5211 9. For compatibility with Sendmail, the command line option
5219 and sets the incoming protocol and host name (for trusted callers). The
5220 host name and its colon can be omitted when only the protocol is to be set.
5221 Note the Exim already has two private options, -pd and -ps, that refer to
5222 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5223 "s", but I don't think that's a major issue.
5225 10. A number of refactoring changes to the code, none of which should affect
5228 (a) The number of logging options was getting close to filling up the
5229 32-bit word that was used as a bit map. I have split them into two classes:
5230 those that are passed in the argument to log_write(), and those that are
5231 only ever tested independently outside of that function. These are now in
5232 separate 32-bit words, so there is plenty of room for expansion again.
5233 There is no change in the user interface or the logging behaviour.
5235 (b) When building, for example, log lines, the code previously used a
5236 macro that called string_cat() twice, in order to add two strings. This is
5237 not really sufficiently general. Furthermore, there was one instance where
5238 it was actually wrong because one of the argument was used twice, and in
5239 one call a function was used. (As it happened, calling the function twice
5240 did not affect the overall behaviour.) The macro has been replaced by a
5241 function that can join an arbitrary number of extra strings onto a growing
5244 (c) The code for expansion conditions now uses a table and a binary chop
5245 instead of a serial search (which was left over from when there were very
5246 few conditions). Also, it now recognizes conditions like "pam" even when
5247 the relevant support is not compiled in: a suitably worded error message is
5248 given if an attempt is made to use such a condition.
5250 11. Added ${time_interval:xxxxx}.
5252 12. A bug was causing one of the ddress fields not to be passed back correctly
5253 from remote delivery subprocesses. The field in question was not being
5254 subsequently used, so this caused to problems in practice.
5256 13. Added new log selectors queue_time and deliver_time.
5258 14. Might have fixed a bug in maildirsizefile handling that threw up
5259 "unexpected character" debug warnings, and recalculated the data
5260 unnecessarily. In any case, I expanded the warning message to give more
5263 15. Added the message "Restricted characters in address" to the statements in
5264 the default ACL that block characters like @ and % in local parts.
5266 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5267 Three changes have been made:
5269 (a) There was a serious bug; a negative response to MAIL caused the whole
5270 recipient domain to be cached as invalid, thereby blocking all messages
5271 to all local parts at the same domain, from all senders. This bug has
5272 been fixed. The domain is no longer cached after a negative response to
5273 MAIL if the sender used is not empty.
5275 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5278 (c) A new callout option, "use_sender" has been added for people who want
5279 the modified behaviour.
5285 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5288 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5289 indeed breaks things for older releases.
5291 3. Added additional logging to the case where there is a problem reading data
5292 from a filter that is running in a subprocess using a pipe, in order to
5293 try to track down a specific problem.
5295 4. Testing facility fudge: when running in the test harness and attempting
5296 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5297 getting "No route to host". Convert this to a timeout.
5299 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5302 6. Some OS don't have socklen_t but use size_t instead. This affects the
5303 fifth argument of getsockopt() amongst other things. This is now
5304 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5305 can be set for individual OS. I have set it for SunOS5, OSF1, and
5306 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5307 some earlier ones do not.
5309 7. Change 4.30/15 was not doing the test caselessly.
5311 8. The standard form for an IPv6 address literal was being rejected by address
5312 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5313 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5314 this, as well as the form without the "IPv6" on the front (but only when
5315 address literals are enabled, of course).
5317 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5319 10. Exim crashed if a message with an empty sender address specified by -f
5320 encountered a router with an errors_to setting. This could be provoked only
5321 by a command such as
5325 where an empty string was supplied; "<>" did not hit this bug.
5327 11. Installed PCRE release 4.5.
5329 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5330 remained set. It is now erased.
5332 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5333 times from message ids (which are base 36 rather than the normal 62).
5335 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5336 were being counted as actual protocol errors, and logged if the log
5337 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5338 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5339 and DATA following a set of rejected RCPTs do not count as protocol errors.
5340 In other words, Exim assumes they were pipelined, though this may not
5341 actually be the case. Of course, in all cases the client gets an
5342 appropriate error code.
5344 15. If a lookup fails in an ACL condition, a message about the failure may
5345 be available; it is used if testing the ACL cannot continue, because most
5346 such messages specify what the cause of the deferral is. However, some
5347 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5348 that caused an old message to be retained and used if a later statement
5349 caused a defer, replacing the real cause of the deferral.
5351 16. If an IP address had so many PTR records that the DNS lookup buffer
5352 was not large enough to hold them, Exim could crash while trying to process
5353 the truncated data. It now detects and logs this case.
5355 17. Further to 4.21/58, another change has been made: if (and only if) the
5356 first line of a message (the first header line) ends with CRLF, a bare LF
5357 in a subsequent header line has a space inserted after it, so as not to
5358 terminate the header.
5360 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5361 unnecessarily, used atoi() instead of strtol(), and didn't check the
5362 termination when getting file sizes from file names by regex.
5364 19. Completely re-implemented the support for maildirsize files, in the light
5365 of a number of problems with the previous contributed implementation
5366 (4.30/29). In particular:
5368 . If the quota is zero, the maildirsize file is maintained, but no quota is
5371 . If the maildir directory does not exist, it is created before any attempt
5372 to write a maildirsize file.
5374 . The quota value in the file is just a cache; if the quota is changed in
5375 the transport, the new value overrides.
5377 . A regular expression is available for excluding directories from the
5380 20. The autoreply transport checks the characters in options that define the
5381 message's headers; it allows continued headers, but it was checking with
5382 isspace() after an embedded newline instead of explicitly looking for a
5385 21. If all the "regular" hosts to which an address was routed had passed their
5386 expiry times, and had not reached their retry times, the address was
5387 bounced, even if fallback hosts were defined. Now Exim should go on to try
5390 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5391 equivalent code in the SMTP transport. Some hosts send humungous responses
5392 to HELO/EHLO, more than 1024 it seems.
5394 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5395 gives compiler warnings in some environments. I've now done it "properly",
5398 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5399 (because of problems with the built-in one) was declared to return uschar *
5400 instead of char *, causing compiler failure.
5402 25. Fixed a file descriptor leak when processing alias/forward files.
5404 26. Fixed a minor format string issue in dbfn.c.
5406 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5408 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5409 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5412 29. When a sender address is verified, it is cached, to save repeating the test
5413 when there is more than one recipient in a message. However, when the
5414 verification involves a callout, it is possible for different callout
5415 options to be set for different recipients. It is too complicated to keep
5416 track of this in the cache, so now Exim always runs a verification when a
5417 callout is required, relying on the callout cache for the optimization.
5418 The overhead is duplication of the address routing, but this should not be
5421 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5422 to be verified with callout=postmaster, and the main callout worked but the
5423 postmaster check failed, the verification correctly failed. However, if a
5424 subsequent RCPT command asked for sender verification *without* the
5425 postmaster check, incorrect caching caused this verification also to fail,
5428 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5429 it was not caching the DNS options (qualify_single, search_parents) that
5430 were used when the lookup failed. A subsequent lookup with different
5431 options therefore always gave the same answer, though there were cases
5432 where it should not have. (Example: a "domains = !$mx_any" option on a
5433 dnslookup router: the "domains" option is always processed without any
5434 widening, but the router might have qualify_single set.) Now Exim uses the
5435 cached value only when the same options are set.
5437 32. Added John Jetmore's "exipick" utility to the distribution.
5439 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5440 than a timeout (e.g. a certificate is required, and is not provided), an
5441 Exim server now closes the connection immediately. Previously it waited for
5442 the client to close - but if the client is SSL, it seems that they each
5443 wait for each other, leading to a delay before one of them times out.
5445 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5446 maintained 0.8.x compatibility because I don't think many are using it, and
5447 it is clearly obsolete.
5449 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5452 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5453 client certificate was expired. A simple patch fixes this, though I don't
5454 understand the full logic of why the verify callback is called multiple
5457 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5458 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5459 which causes problems with some clients (such as the Certicom SSL Plus
5460 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5461 disables the coutermeasure allowing Eudora to connect."
5463 38. Exim was not checking that a write() to a log file succeeded. This could
5464 lead to Bad Things if a log got too big, in particular if it hit a file
5465 size limit. Exim now panics and dies if it cannot write to a log file, just
5466 as it does if it cannot open a log file.
5468 39. Modified OS/Makefile-Linux so that it now contains
5470 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5472 The two -D definitions ensure that Exim is compiled with large file
5473 support, which makes it possible to handle log files that are bigger than
5476 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5477 instance) a domain was checked against a named list that involved a lookup,
5478 causing $domain_data to be set, then another domain was checked against the
5479 same list, then the first domain was re-checked, the value of $domain_data
5480 after the final check could be wrong. In particular, if the second check
5481 failed, it could be set empty. This bug probably also applied to
5484 41. The strip_trailing_dot option was not being applied to the address given
5485 with the -f command-line option.
5487 42. The code for reading a message's header from the spool was incrementing
5488 $received_count, but never initializing it. This meant that the value was
5489 incorrect (doubled) while delivering a message in the same process in which
5490 it was received. In the most common configuration of Exim, this never
5491 happens - a fresh exec is done - but it can happen when
5492 deliver_drop_privilege is set.
5494 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5495 it now includes up to 150 characters of the unexpected data in the log
5498 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5499 and building data strings. The size of both of these buffers was 10 000
5500 bytes - far larger than anybody would *ever* want, thought I. Needless to
5501 say, somebody hit the limit. I have increased the maximum line length to
5502 20 000 and the maximum data length of concatenated lines to 100 000. I have
5503 also fixed two bugs, because there was no checking on these buffers. Tsk,
5504 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5505 buffer is too small.
5507 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5508 lsearch lookups. Now it does.
5510 46. When parsing a route_list item in a manualroute router, a fixed-length
5511 buffer was used for the list of hosts. I made this 1024 bytes long,
5512 thinking that nobody would ever have a list of hosts that long. Wrong.
5513 Somebody had a whole pile of complicated expansion conditions, and the
5514 string was silently truncated, leading to an expansion error. It turns out
5515 that it is easier to change to an unlimited length (owing to other changes
5516 that have happened since this code was originally written) than to build
5517 structure for giving a limitation error. The length of the item that
5518 expands into the list of hosts is now unlimited.
5520 47. The lsearch lookup could not handle data where the length of text line was
5521 more than 4095 characters. Such lines were truncated, leading to shortened
5522 data being returned. It should now handle lines of any length.
5524 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5525 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5528 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5529 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5530 no longer happens in comment lines. A list of replacements is now placed
5531 at the head of all of the source files, except those whose only change is
5532 to replace PERL_COMMAND in the very first #! line.
5534 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5535 messages on the queue, with a bottom-up merge sort, using code contributed
5536 by Michael Haardt. This should make operations like -bp somewhat faster on
5537 large queues. It won't affect queue runners, except when queue_run_in_order
5540 51. Installed eximstats 1.31 in the distribution.
5542 52. Added support for SRV lookups to the dnslookup router.
5544 53. If an ACL referred to $message_body or $message_body_end, the value was not
5545 reset for any messages that followed in the same SMTP session.
5547 54. The store-handling optimization for building very long strings was not
5548 differentiating between the different store pools. I don't think this
5549 actually made any difference in practice, but I've tidied it.
5551 55. While running the routers to verify a sender address, $sender_address
5552 was still set to the sender address. This is wrong, because when routing to
5553 send a bounce to the sender, it would be empty. Therefore, I have changed
5554 it so that, while verifying a sender address, $sender_address is set to <>.
5555 (There is no change to what happens when verifying a recipient address.)
5557 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5558 target A or AAAA records (if not already returned) without resetting the
5559 qualify_single or search_parents options of the DNS resolver. These are
5560 inappropriate in this case because the targets of MX and SRV records must
5561 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5562 target that, when qualified, matched something in the local domain. These
5563 two options are now turned off when doing these lookups.
5565 57. It seems that at least some releases of Reiserfs (which does not have the
5566 concept of a fixed number of inodes) returns zero and not -1 for the
5567 number of available inodes. This interacted badly with check_spool_inodes,
5568 which assumed that -1 was the "no such thing" setting. What I have done is
5569 to check that the total number of inodes is greater than zero before doing
5570 the test of how many are available.
5572 58. When a "warn" ACL statement has a log_message modifier, the message is
5573 remembered, and not repeated. This is to avoid a lot of repetition when a
5574 message has many recipients that cause the same warning to be written.
5575 Howewer, Exim was preserving the list of already written lines for an
5576 entire SMTP session, which doesn't seem right. The memory is now reset if a
5577 new message is started.
5579 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5580 debugging output unless log_rewrite was also set.
5582 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5583 of (int)(handle) when we know that handle contains (void *)(-1).
5585 61. The Exim daemon panic-logs an error return when it closes the incoming
5586 connection. However "connection reset by peer" seems to be common, and
5587 isn't really an error worthy of noting specially, so that particular error
5590 62. When Exim is trying to find all the local interfaces, it used to panic and
5591 die if the ioctl to get the interface flags failed. However, it seems that
5592 on at least one OS (Solaris 9) it is possible to have an interface that is
5593 included in the list of interfaces, but for which you get a failure error
5594 for this call. This happens when the interface is not "plumbed" into a
5595 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5596 failure of the "get flags" call assumes that the interface is down.
5598 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5599 makes life easier for people who are doing arithmetic on fields extracted
5600 from dates, where you often get leading zeros that should not be
5601 interpreted as octal.
5603 64. Added qualify_domain to the redirect router, to override the global
5606 65. If a pathologically long header line contained very many addresses (the
5607 report of this problem mentioned 10 000) and each of them was rewritten,
5608 Exim could use up a very large amount of memory. (It kept on making new
5609 copies of the header line as it rewrote, and never released the old ones.)
5610 At the expense of a bit more processing, the header rewriting function has
5611 been changed so that it no longer eats memory in this way.
5613 66. The generation of the Received: header has been moved from the time that a
5614 message starts to be received, to the time that it finishes. The timestamp
5615 in the Received: header should now be very close to that of the <= log
5616 line. There are two side-effects of this change:
5618 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5619 logged header lines no longer include the local Received: line, because
5620 it has not yet been created. The same applies to a copy of the message
5621 that is returned to a non-SMTP sender when a message is rejected.
5623 (b) When a filter file is tested using -bf, no additional Received: header
5624 is added to the test message. After some thought, I decided that this
5627 This change does not affect the value of $received_for. It is still set
5628 after address rewriting, but before local_scan() is called.
5630 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5632 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5633 gave an unhelpful panic error message, and a defer error. I have managed to
5634 change this behaviour so that it now rejects any supplied certificate,
5635 which seems right, as the list of acceptable certificates is empty.
5637 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5638 gave an unhelpful defer error. I have not managed to make this reject any
5639 supplied certificates, but the error message it gives is "no certificate
5640 supplied", which is not helpful.
5642 70. exigrep's output now also includes lines that are not associated with any
5643 message, but which match the given pattern. Implemented by a patch from
5644 Martin Sluka, which also tidied up the Perl a bit.
5646 71. Recipient callout verification, like sender verification, was using <> in
5647 the MAIL FROM command. This isn't really the right thing, since the actual
5648 sender may affect whether the remote host accepts the recipient or not. I
5649 have changed it to use the actual sender in the callout; this means that
5650 the cache record is now keyed on a recipient/sender pair, not just the
5651 recipient address. There doesn't seem to be a real danger of callout loops,
5652 since a callout by the remote host to check the sender would use <>.
5653 [SEE ABOVE: changed after hitting problems.]
5655 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5656 temporary errors. However, in the case of such a code being given after
5657 the end of a data transmission (i.e. after ".") Exim was failing to write
5658 a retry record for the message. (Yes, there was some broken host that was
5659 actually sending 8xx at this point.)
5661 73. An unknown lookup type in a host list could cause Exim to panic-die when
5662 the list was checked. (An example that provoked this was putting <; in the
5663 middle of a list instead of at the start.) If this happened during a DATA
5664 ACL check, a -D file could be left lying around. This kind of configuration
5665 error no longer causes Exim to die; instead it causes a defer errror. The
5666 incident is still logged to the main and panic logs.
5668 74. Buglet left over from Exim 3 conversion. The message "too many messages
5669 in one connection" was written to the rejectlog but not the mainlog, except
5670 when address rewriting (yes!) was being logged.
5672 75. Added write_rejectlog option.
5674 76. When a system filter was run not as root (that is, when system_filter_user
5675 was set), the values of the $n variables were not being returned to the
5676 main process; thus, they were not subsequently available in the $sn
5679 77. Added +return_path_on_delivery log selector.
5681 78. A connection timeout was being treated differently from recipients deferred
5682 when testing hosts_max_try with a message that was older than the host's
5683 retry timeout. (The host should not be counted, thus allowing all hosts to
5684 be tried at least once before bouncing.) This may have been the cause of an
5685 occasionally reported bug whereby a message would remain on the queue
5686 longer than the retry timeout, but would be bounced if a delivery was
5687 forced. I say "may" because I never totally pinned down the problem;
5688 setting up timeout/retry tests is difficult. See also the next item.
5690 79. The ultimate address timeout was not being applied to errors that involved
5691 a combination of host plus message (for example, a timeout on a MAIL
5692 command). When an address resolved to a number of possible hosts, and they
5693 were not all tried for each delivery (e.g. because of hosts_max_try), a
5694 message could remain on the queue longer than the retry timeout.
5696 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5699 81. Fixed an obscure SMTP outgoing bug which required at least the following
5700 conditions: (a) there was another message waiting for the same server;
5701 (b) the server returned 5xx to all RCPT commands in the first message so
5702 that the message was not completed; (c) the server dropped the connection
5703 or gave a negative response to the RSET that Exim sends to abort the
5704 transaction. The observed case was a dropped connection after DATA that had
5705 been sent in pipelining mode. That is, the server had advertised PIPELINING
5706 but was not implementing it correctly. The effect of the bug was incorrect
5707 behaviour, such as trying another host, and this could lead to a crash.
5713 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5714 and daemon.c were passed as pointers to ints; they should have been
5715 pointers to socklen_t variables (which are typically unsigned ints).
5717 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5720 3. Fixed a really odd bug that affected only the testing scheme; patching a
5721 certain fixed string in the binary changed the value of another string that
5722 happened to be identical to the end of the original first string.
5724 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5725 name", it returns that address as the IP address. On some operating
5726 systems (e.g. Solaris), it also passes back the IP address string as the
5727 "host name". However, on others (e.g. Linux), it passes back an empty
5728 string. Exim wasn't checking for this, and was changing the host name to an
5729 empty string, assuming it had been canonicized.
5731 5. Although rare, it is permitted to have more than one PTR record for a given
5732 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5733 all the names associated with an address, because they do in Solaris.
5734 However, it seems that they do not in Linux for data that comes from the
5735 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5736 I found this out when I moved to a new Linux workstation and tried to run
5737 the Exim test suite.
5739 To get round this problem I have changed the code so that it now does its
5740 own call to the DNS to look up PTR records when searching for a host name.
5741 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5742 addresses that are only in /etc/hosts are still found.
5744 This behaviour is, however, controlled by an option called host_lookup_
5745 order, which defaults to "bydns:byaddr". If people want to use the other
5746 order, or indeed, just use one or the other means of lookup, they can
5747 specify it in this variable.
5749 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5750 some operating systems, this comes back from gethostbyaddr() as an empty
5751 string, and this is what Exim used to test for. However, it seems that in
5752 other systems, "." is yielded. Exim now tests for this case too.
5754 7. The values of check_spool_space and check_log_space are now held internally
5755 as a number of kilobytes instead of an absolute number of bytes. If a
5756 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5757 kilobyte. This means that much larger values can be stored.
5759 8. Exim monitor: an attempt to get the action menu when not actually pointing
5760 at a message produces an empty menu entitled "No message selected". This
5761 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5762 no entries in it ("Shell widget menu has zero width and/or height"). So I
5763 have added a single, blank menu entry in this case.
5765 9. Added ${quote_local_part.
5767 10. MIME decoding is now applied to the contents of Subject: header lines when
5770 11. Now that a reference to $sender_host_address automatically causes a reverse
5771 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5772 host lookup before query-style lookups in lists that might use this
5773 variable. This has therefore been abolished, and the "net-" prefix is no
5774 longer necessary for query-style lookups.
5776 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5777 have been a typo for LFLAGS, so it has been changed.
5779 13. The install script calls Exim with "-C /dev/null" in order to find the
5780 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5781 to be output. Howeve, since Exim outputs its version number before the
5782 error, it didn't break the script. It just looked ugly. I fixed this by
5783 always allowing "-C /dev/null" if the caller is root.
5785 14. Ignore overlarge ACL variable number when reading spool file - insurance
5786 against a later release with more variables having written the file.
5788 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5789 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5790 this, as well as the form without the "IPv6" on the front.
5792 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5793 OS/Makefile-Darwin file.
5795 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5796 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5798 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5799 variable. However, some OS use ints for inodes. I've added cast to long int
5800 to get rid of the compiler warning.
5802 19. I had forgotten to lock out "/../" in configuration file names when
5803 ALT_CONFIG_PREFIX was set.
5805 20. Routers used for verification do not need to specify transports. However,
5806 if such a router generated a host list, and callout was configured, Exim
5807 crashed, because it could not find a port number from the (non-existent)
5808 transport. It now assumes port 25 in this circumstance.
5810 21. Added the -t option to exigrep.
5812 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5813 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5814 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5815 them is set, LOOKUP_LSEARCH is forced.
5817 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5819 24. Added sender and host information to the "rejected by local_scan()" log
5820 line; previously there was no indication of these.
5822 25. Added .include_if_exists.
5824 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5825 Linux. It turns out that not all file systems support this. Apparently some
5826 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5827 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5828 not supported on the file descriptor, is now ignored when Exim is trying to
5829 sync a directory. This applies only to Linux.
5831 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5833 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5834 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5837 29. Added support for maildirsize files from supplied patch (modified a bit).
5839 30. The use of :fail: followed by an empty string could lead Exim to respond to
5840 sender verification failures with (e.g.):
5842 550 Verification failed for <xxx>
5843 550 Sender verify failed
5845 where the first response line was missing the '-' that indicates it is not
5846 the final line of the response.
5848 31. The loop for finding the name of the user that called Exim had a hardwired
5849 limit of 10; it now uses the value of finduser_retries, which is used for
5850 all other user lookups.
5852 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5855 33. Exim was neglecting to zero errno before one call of strtol() when
5856 expanding a string and expecting an integer value. On some systems this
5857 resulted in spurious "integer overflow" errors. Also, it was casting the
5858 result into an int without checking.
5860 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5861 did not work. The code looks as if it has *never* worked, though it appears
5862 to have been documented since at least releast 1.62. I have made it work.
5864 35. The "timeout_DNS" error in retry rules, also documented since at least
5865 1.62, also never worked. As it isn't clear exactly what this means, and
5866 clearly it isn't a major issue, I have abolished the feature by treating it
5867 as "timeout", and writing a warning to the main and panic logs.
5869 36. The display of retry rules for -brt wasn't always showing the error code
5872 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5873 timeout_connect_A, timeout_connect_MX.
5875 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5876 to the empty sender.
5878 39. The daemon was not analysing the content of -oX till after it had closed
5879 stderr and disconnected from the controlling terminal. This meant that any
5880 syntax errors were only noted on the panic log, and the return code from
5881 the command was 0. By re-arranging the code a little, I've made the
5882 decoding happen first, so such errors now appear on stderr, and the return
5883 code is 1. However, the actual setting up of the sockets still happens in
5884 the disconnected process, so errors there are still only recorded on the
5887 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5888 connections (as happens on some IP stacks) was logged at start up time as
5889 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5890 it from "IPv6 and IPv4", which means that two separate sockets are being
5893 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5894 says whether AF_INET or AF_INET6 was passed as an argument.
5896 42. Exiwhat output was messed up when time zones were included in log
5899 43. Exiwhat now gives more information about the daemon's listening ports,
5900 and whether -tls-on-connect was used.
5902 44. The "port" option of the smtp transport is now expanded.
5904 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5905 silently ignored. Now an error message is written to the main and panic
5908 46. There's a new ACL modifier called "logwrite" which writes to a log file
5909 as soon as it is encountered.
5911 47. Added $local_user_uid and $local_user_gid at routing time.
5913 48. Exim crashed when trying to verify a sender address that was being
5916 49. Exim was recognizing only a space character after ".include". It now also
5917 recognizes a tab character.
5919 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5920 extracting the relevant information from the specification. The man page no
5921 longer contains scrambled data for the -d option, and I've added a section
5922 at the front about calling Exim under different names.
5924 51. Added "extra_headers" argument to the "mail" command in filter files.
5926 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5929 53. Installed eximstats 1.29.
5931 54. Added transport_filter_timeout as a generic transport option.
5933 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5934 Cc: header lines. This was required by RFC 822, but it not required by RFC
5937 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5938 incoming messages that did not have them. Now it does so only if the
5939 message originates locally, that is, if there is no associated remote host
5940 address. When Resent- header lines are present, this applies to the Resent-
5941 lines rather than the non-Resent- lines.
5943 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5944 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5946 58. Messages for configuration errors now include the name of the main
5947 configuration file - useful now that there may be more than one file in a
5948 list (.included file names were always shown).
5950 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5951 for those rare installations that do not start the daemon as root or run it
5952 setuid root. I've cut out the call to initgroups() if the daemon is not
5955 60. The Exim user and group can now be bound into the binary as text strings
5956 that are looked up at the start of Exim's processing.
5958 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5960 62. Added $mailstore_basename variable.
5962 63. Installed patch to sieve.c from Michael Haardt.
5964 64. When Exim failed to open the panic log after failing to open the main log,
5965 the original message it was trying to log was written to stderr and debug
5966 output, but if they were not available (the usual case in production), it
5967 was lost. Now it is written to syslog before the two lines that record the
5968 failures to open the logs.
5970 65. Users' Exim filters run in subprocesses under the user's uid. It is
5971 possible for a "deliver" command or an alias in a "personal" command to
5972 provoke an address rewrite. If logging of address rewriting is configured,
5973 this fails because the process is not running as root or exim. There may be
5974 a better way of dealing with this, but for the moment (because 4.30 needs
5975 to be released), I have disabled address rewrite logging when running a
5976 filter in a non-root, non-exim process.
5982 1. The buildconfig auxiliary program wasn't quoting the value set for
5983 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5984 not defined. This bug was masked in 4.22 by the effect that was fixed in
5987 2. Some messages that were rejected after a message id was allocated were
5988 shown as "incomplete" by exigrep. It no longer does this for messages that
5989 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5991 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5992 have allow_domain_literals set, the ID did not get logged in the <= line.
5993 Domain literals are now always recognized in Message-ID: header lines.
5995 4. The first argument for a ${extract expansion item is the key name or field
5996 number. Leading and trailing spaces in this item were not being ignored,
5997 causing some misleading effects.
5999 5. When deliver_drop_privilege was set, single queue runner processes started
6000 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6001 same command in the process it spins off) were not dropping privilege.
6003 6. When the daemon running as "exim" started a queue runner, it always
6004 re-executed Exim in the spun-off process. This is a waste of effort when
6005 deliver_drop_privilege is set. The new process now just calls the
6006 queue-runner function directly.
6012 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6015 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6016 ignored. Though the use of -oP was forcing the writing of a pid file, it
6017 was always written to the default place.
6019 3. If the message "no IP address found for host xxxx" is generated during
6020 incoming verification, it is now followed by identification of the incoming
6021 connection (so you can more easily find what provoked it).
6023 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6025 5. Added some features to "harden" Exim a bit more against certain attacks:
6027 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6028 be put in Local/Makefile. This is like the never_users runtime option,
6029 but it cannot be overridden. The default setting is "root".
6031 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6032 prefix string with which any file named in a -C command line option
6035 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6036 is retained for -C and -D only if the caller of Exim is root. Without
6037 it, the exim user may also use -C and -D and retain privilege.
6039 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6040 command line option is disabled.
6042 6. Macro names set by the -D option must start with an upper case letter, just
6043 like macro names defined in the configuration file.
6045 7. Added "dereference=" facility to LDAP.
6047 8. Two instances of the typo "uknown" in the source files are fixed.
6049 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6050 the Configure-Makefile script screwed up while processing it.
6052 10. Incorporated PCRE 4.4.
6054 11. The SMTP synchronization check was not operating right at the start of an
6055 SMTP session. For example, it could not catch a HELO sent before the client
6056 waited for the greeting. There is now a check for outstanding input at the
6057 point when the greeting is written. Because of the duplex, asynchronous
6058 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6059 way, but not yet received, when the check is performed.
6061 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6062 on TCP/IP sockets, because this apparently causes some broken clients to
6065 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6066 unchanged) from the Cygwin maintainer.
6068 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6069 was supported instead of testing for mbx. Effectively a typo.
6071 15. The spa authenticator server code was not checking that the input it
6072 received was valid base64.
6074 16. The debug output line for the "set" modifier in ACLs was not showing the
6075 name of the variable that was being set.
6077 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6079 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6080 lookup on its own. Something else was needed to trigger the lookup. For
6081 example, a match in host_lookup or the need for a host name in a host list.
6082 Now, if $sender_host_name is referenced and the host name has not yet been
6083 looked up, a lookup is performed. If the lookup fails, the variable remains
6084 empty, and $host_lookup_failed is set to "1".
6086 19. Added "eqi" as a case-independent comparison operator.
6088 20. The saslauthd authentication condition could segfault if neither service
6089 nor realm was specified.
6091 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6092 error message that was logged was misleading, and incoming SMTP
6093 connections were dropped. The message is now more accurate, and temporary
6094 errors are given to SMTP connections.
6096 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6097 (except RSET) with a 421 error, until QUIT is received. However, it was
6098 failing to send a response to QUIT.
6100 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6101 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6102 ACL is now run after the helo_try_verify_hosts code.
6104 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6105 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6106 case-independent, so other case variants are also recognized). Apparently
6107 some systems use these upper case variants.
6109 25. If more than two messages were waiting for the same host, and a transport
6110 filter was specified for the transport, Exim sent two messages over the
6111 same TCP/IP connection, and then failed with "socket operation on non-
6112 socket" when it tried to send the third.
6114 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6116 27. The extern definition of crypt16() in expand.c was not being excluded when
6117 the OS had its own crypt16() function.
6119 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6120 as a preferred synonym for return_size_limit, both as an option and as an
6123 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6125 30. Changed the default configuration ACL to relax the local part checking rule
6126 for addresses that are not in any local domains. For these addresses,
6127 slashes and pipe symbols are allowed within local parts, but the sequence
6128 /../ is explicitly forbidden.
6130 31. SPA server authentication was not clearing the challenge buffer before
6133 32. log_message in a "warn" ACL statement was writing to the reject log as
6134 well as to the main log, which contradicts the documentation and doesn't
6135 seem right (because no rejection is happening). So I have stopped it.
6137 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6138 However, I am unable to do any testing of this.
6140 34. Fixed an infelicity in the appendfile transport. When checking directories
6141 for a mailbox, to see if any needed to be created, it was accidentally
6142 using path names with one or more superfluous leading slashes; tracing
6143 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6145 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6146 contents are added to the log line that is written for every discarded
6147 recipient. (Previously a log_message setting was ignored.)
6149 36. The ${quote: operator now quotes the string if it is empty.
6151 37. The install script runs exim in order to find its version number. If for
6152 some reason other than non-existence or emptiness, which it checks, it
6153 could not run './exim', it was installing it with an empty version number,
6154 i.e. as "exim-". This error state is now caught, and the installation is
6157 38. An argument was missing from the function that creates an error message
6158 when Exim fails to connect to the socket for saslauthd authentication.
6159 This could cause Exim to crash, or give a corrupted message.
6161 39. Added isip, isip4, and isip6 to ${if conditions.
6163 40. The ACL variables $acl_xx are now saved with the message, and can be
6164 accessed later in routers, transports, and filters.
6166 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6167 strings in the file are not string-expanded.
6169 42. If a MAIL command specified a SIZE value that was too large to fit into an
6170 int variable, the check against message_size_limit failed. Such values are
6171 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6172 day this will have to be increased, but I don't think I want to be around
6173 when emails are that large.
6180 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6181 iconv() is not standard in FreeBSD.
6183 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6184 IPv6 enabled. The observed symptom was a segmentation fault on return from
6185 the function os_common_find_running_interfaces() in src/os.c.
6187 3. In the check_special_case() function in daemon.c I had used "errno" as an
6188 argument name, which causes warnings on some systems. This was basically a
6189 typo, since it was named "eno" in the comments!
6191 4. The code that waits for the clock to tick (at a resolution of some fraction
6192 of a second) so as to ensure message-id uniqueness was always waiting for
6193 at least one whole tick, when it could have waited for less. [This is
6194 almost certainly not relevant at current processor speeds, where it is
6195 unlikely to ever wait at all. But we try to future-proof.]
6197 5. The function that sleeps for a time interval that includes fractions of a
6198 second contained a race. It did not block SIGALRM between setting the
6199 timer, and suspending (a couple of lines later). If the interval was short
6200 and the sigsuspend() was delayed until after it had expired, the suspension
6201 never ended. On busy systems this could lead to processes getting stuck for
6204 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6205 process, before it forks any delivery processes. The open lookup caching
6206 mechanism meant that the open file or database connection was passed into
6207 the delivery process. The problem was that delivery processes always tidy
6208 up cached lookup data. This could cause a problem for the next delivery
6209 process started by the queue runner, because the external queue runner
6210 process does not know about the closure. So the next delivery process
6211 still has data in the lookup cache. In the case of a file lookup, there was
6212 no problem because closing a file descriptor in a subprocess doesn't affect
6213 the parent. However, if the lookup was caching a connection to a database,
6214 the connection was closed, and the second delivery process was likely to
6215 see errors such as "PGSQL: query failed: server closed the connection
6216 unexpectedly". The problem has been fixed by closing all cached lookups
6217 in a queue runner before running a delivery process.
6219 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6220 seem to have the "const" qualifier which it has on other OS. I've
6223 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6224 *of the same type* (client or server) with the same public name that an
6225 error should be diagnosed.
6227 9. When Exim looked up a host name for an IP address, but failed to find the
6228 original IP address when looking up the host name (a safety check), it
6229 output the message "<ip address> does not match any IP for NULL", which was
6230 confusing, to say the least. The bug was that the host name should have
6231 appeared instead of "NULL".
6233 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6234 user that is built into the binary, and the -C or -D options is used, root
6235 privilege is dropped before the configuration file is read. In addition,
6236 logging is switched to stderr instead of the normal log files. If the
6237 configuration then re-defines the Exim user, the unprivileged environment
6238 is probably not what is expected, so Exim logs a panic warning message (but
6241 However, if deliver_drop_privilege is set, the unprivileged state may well
6242 be exactly what is intended, so the warning has been cut out in that case,
6243 and Exim is allowed to try to write to its normal log files.
6249 1. smtp_return_error_details was not giving details for temporary sender
6250 or receiver verification errors.
6252 2. Diagnose a configuration error if two authenticators have the same public
6255 3. Exim used not to create the message log file for a message until the first
6256 delivery attempt. This could be confusing when incoming messages were held
6257 for policy or load reasons. The message log file is now created at the time
6258 the message is received, and an initial "Received" line is written to it.
6260 4. The automatically generated man page for command line options had a minor
6261 bug that caused no ill effects; however, a more serious problem was that
6262 the procedure for building the man page automatically didn't always
6263 operate. Consequently, release 4.20 contains an out-of-date version. This
6264 shouldn't happen again.
6266 5. When building Exim with embedded Perl support, the script that builds the
6267 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6268 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6270 6. The freeze_tell option was not being used for messages that were frozen on
6271 arrival, either by an ACL or by local_scan().
6273 7. Added the smtp_incomplete_transaction log selector.
6275 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6276 was accepting AUTH without a new EHLO.
6278 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6279 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6282 10. Logging of TCP/IP connections (when configured) now happens in the main
6283 daemon process instead of the child process, so that the TCP/IP connection
6284 count is more accurate (but it can never be perfect).
6286 11. The use of "drop" in a nested ACL was not being handled correctly in the
6287 outer ACL. Now, if condition failure induced by the nested "drop" causes
6288 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6289 or "require"), the connection is dropped.
6291 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6292 that yield "discard" can now be used with an "accept" or a "discard" verb,
6293 but an error is generated for any others (because I can't see a useful way
6294 to define what should happen).
6296 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6297 are now processed in the same way as lines in the Exim configuration file.
6298 In particular, continuation lines are supported.
6300 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6302 15. Added -ti meaning -t -i.
6304 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6305 domains, and warn by logging if others are found.
6307 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
6308 returned from GIFCONF when Exim is trying to find the list of interfaces on
6309 a host. The code in os.c has been modified to copy each ifreq to an aligned
6310 structure in all cases.
6312 Also, in some cases, the returned ifreq's were being copied to a 'struct
6313 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6314 means the last couple of bytes of an IPv6 address could be chopped if the
6315 ifreq contained only a normal sockaddr (14 bytes storage).
6317 18. Named domain lists were not supported in the hosts_treat_as_local option.
6318 An entry such as +xxxx was not recognized, and was treated as a literal
6321 19. Ensure that header lines added by a DATA ACL are included in the reject log
6322 if the ACL subsequently rejects the message.
6324 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6325 MD5 (which is deprecated).
6327 21. When testing a filter file using -bf, Exim was writing a message when it
6328 took the sender from a "From " line in the message, but it was not doing so
6329 when it took $return_path from a Return-Path: header line. It now does.
6331 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6332 with a valid header line field name (a series of printing characters
6333 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6335 23. Changed "disc" in the source to "disk" to conform to the documentation and
6336 the book and for uniformity.
6338 24. Ignore Sendmail's -Ooption=value command line item.
6340 25. When execve() failed while trying to run a command in a pipe transport,
6341 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
6342 could be confused with a return value of 69 from the command itself. This
6343 has been changed to 127, the value the shell returns if it is asked to run
6344 a non-existent command. The wording for the related log line suggests a
6345 non-existent command as the problem.
6347 26. If received_header_text expands to an empty string, do not add a Received:
6348 header line to the message. (Well, it adds a token one on the spool, but
6349 marks it "old" so that it doesn't get used or transmitted.)
6351 27. Installed eximstats 1.28 (addition of -nt option).
6353 28. There was no check for failure on the call to getsockname() in the daemon
6354 code. This can fail if there is a shortage of resources on the system, with
6355 ENOMEM, for example. A temporary error is now given on failure.
6357 29. Contrary to the C standard, it seems that in some environments, the
6358 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6359 program. Exim now does this explicitly; it affects the formatting of
6360 timestamps using strftime().
6362 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6363 complaints. I've now initialized all the variables, to avoid this.
6365 32. Header lines added by a system filter were not being "seen" during
6366 transport-time rewrites.
6368 33. The info_callback() function passed to OpenSSL is set up with type void
6369 (*)(SSL *, int, int), as described somewhere. However, when calling the
6370 function (actually a macro) that sets it up, the type void(*)() is
6371 expected. I've put in a cast to prevent warnings from picky compilers.
6373 34. If a DNS black list lookup found a CNAME record, but there were no A
6374 records associated with the domain it pointed at, Exim crashed.
6376 35. If a DNS black list lookup returned more than one A record, Exim ignored
6377 all but the first. It now scans all returned addresses if a particular IP
6378 value is being sought. In this situation, the contents of the
6379 $dnslist_value variable are a list of all the addresses, separated by a
6382 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6383 to accept a host name and all its aliases if the forward lookup for any of
6384 them yielded the IP address of the incoming connection. Now it accepts only
6385 those names whose forward lookup yields the correct IP address. Any other
6386 names are discarded. This closes a loophole whereby a rogue DNS
6387 administrator could create reverse DNS records to break through a
6388 wildcarded host restriction in an ACL.
6390 37. If a user filter or a system filter that ran in a subprocess used any of
6391 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6392 the wrong values were passed to the pipe command ($thisaddress had the
6393 value of $0, $0 had the value of $1, etc). This bug was introduced by
6394 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6396 38. Improved the line breaking for long SMTP error messages from ACLs.
6397 Previously, if there was no break point between 40 and 75 characters, Exim
6398 left the rest of the message alone. Two changes have been made: (a) I've
6399 reduced the minimum length to 35 characters; (b) if it can't find a break
6400 point between 35 and 75 characters, it looks ahead and uses the first one
6401 that it finds. This may give the occasional overlong line, but at least the
6402 remaining text gets split now.
6404 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6405 file descriptors might be low, and that setting 1000 would always raise it.
6406 It turns out that in some environments, the limit is already over 1000 and
6407 that lowering it causes trouble. So now Exim takes care not to decrease it.
6409 40. When delivering a message, the value of $return_path is set to $sender_
6410 address at the start of routing (routers may change the value). By an
6411 oversight, this default was not being set up when an address was tested by
6412 -bt or -bv, which affected the outcome if any router or filter referred to
6415 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6416 log only when "message" or "log_message" are set. However, if one of the
6417 conditions was an address verification, or a call to a nested ACL, the
6418 messages generated by the underlying test were being passed through. This
6419 no longer happens. The underlying message is available in $acl_verify_
6420 message for both "message" and "log_message" expansions, so it can be
6421 passed through if needed.
6423 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6424 new expansion $bh_ to give the encoded byte string without charset
6425 translation. Translation happens only if iconv() is available; HAVE_ICONV
6426 indicates this at build time. HEADERS_CHARSET gives the charset to
6427 translate to; headers_charset can change it in the configuration, and
6428 "headers charset" can change it in an individual filter file.
6430 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6431 that creates RFC 2047 encoded "words" labels them as that charset instead
6432 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6433 expansion operator; (ii) when Exim creates a From: line for a local
6434 message; (iii) when a header line is rewritten to include a "phrase" part.
6436 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6437 buggy, causing it to skip the first lines of messages whose message ID
6438 ended in 'D'. This would not have bitten before Exim release 4.14, because
6439 message IDs were unlikely to end in 'D' before then. The effect was to have
6440 incorrect size information for certain domains.
6442 45. #include "config.h" was missing at the start of the crypt16.c module. This
6443 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6446 46. If there was a timeout during a "random" callout check, Exim treated it as
6447 a failure of the random address, and carried on sending RSET and the real
6448 address. If the delay was just some slowness somewhere, the response to the
6449 original RCPT would be taken as a response to RSET and so on, causing
6450 mayhem of various kinds.
6452 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6453 when I implemented it. It didn't allow for the fact that some option values
6454 may legitimatetly be negative (e.g. size_addition), and it didn't even do
6455 the right test for positive values.
6457 48. Domain names in DNS records are case-independent. Exim always looks them up
6458 in lower case. Some resolvers return domain names in exactly the case they
6459 appear in the zone file, that is, they may contain uppercase letters. Not
6460 all resolvers do this - some return always lower case. Exim was treating a
6461 change of case by a resolver as a change of domain, similar to a widening
6462 of a domain abbreviation. This triggered its re-routing code and so it was
6463 trying to route what was effectively the same domain again. This normally
6464 caused routing to fail (because the router wouldn't handle the domain
6465 twice). Now Exim checks for this case specially, and just changes the
6466 casing of the domain that it ultimately uses when it transmits the message
6469 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6472 50. If a filter generated a file delivery with a non-absolute name (possible if
6473 no home directory exists for the router), the forbid_file option was not
6476 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6477 the existing equality matching.
6479 52. Exim was using ints instead of ino_t variables in some places where it was
6480 dealing with inode numbers.
6482 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6483 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6484 called TMPDIR, and if it finds it is different, it changes its value.
6486 54. The smtp_printf() function is now made available to local_scan() so
6487 additional output lines can be written before returning. There is also an
6488 smtp_fflush() function to enable the detection of a dropped connection.
6489 The variables smtp_input and smtp_batched_input are exported to
6492 55. Changed the default runtime configuration: the message "Unknown user"
6493 has been removed from the ACL, and instead placed on the localuser router,
6494 using the cannot_route_message feature. This means that any verification
6495 failures that generate their own messages won't get overridden. Similarly,
6496 the "Unrouteable address" message that was in the ACL for unverifiable
6497 relay addresses has also been removed.
6499 56. Added hosts_avoid_esmtp to the smtp transport.
6501 57. The exicyclog script was not checking for the esoteric option
6502 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6503 will work only if exicyclog is run under the appropriate euid.
6505 58. Following a discussion on the list, the rules by which Exim recognises line
6506 endings on incoming messages have been changed. The -dropcr and drop_cr
6507 options are now no-ops, retained only for backwards compatibility. The
6508 following line terminators are recognized: LF CRLF CR. However, special
6509 processing applies to CR:
6511 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6512 nor a local message in the state where . is a terminator.
6514 (ii) If a bare CR is encountered in a header line, an extra space is added
6515 after the line terminator so as not to end the header. The reasoning
6516 behind this is that bare CRs in header lines are most likely either
6517 to be mistakes, or people trying to play silly games.
6519 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6520 was being incorrectly given as 18 bytes larger than it should have been.
6521 This is a VOB (very old bug).
6523 60. This may never have affected anything current, but just in case it has:
6524 When the local host is found other than at the start of a list of hosts,
6525 the local host, those with the same MX, and any that follow, are discarded.
6526 When the list in question was part of a longer list of hosts, the following
6527 hosts (not currently being processed) were also being discarded. This no
6528 longer happens. I'm not sure if this situation could ever has previously
6531 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6534 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6535 header. This is something that is recommended in a new Internet Draft, and
6536 is something that is documented as being done by Sendmail. There are two
6537 possible values. For messages generated by the autoreply transport, Exim
6540 Auto-Submitted: auto-replied
6542 whereas for all other generated messages (e.g. bounces) it adds
6544 Auto-Submitted: auto-generated
6546 63. The "personal" condition in filters now includes a test for the
6547 Auto-Submitted: header. If it contains the string "auto-" the message it
6548 not considered personal.
6550 64. Added rcpt_include_affixes as a generic transport option.
6552 65. Added queue_only_override (default true).
6554 66. Added the syslog_duplication option.
6556 67. If what should have been the first header line of a message consisted of
6557 a space followed by a colon, Exim was mis-interpreting it as a header line.
6558 It isn't of course - it is syntactically invalid and should therefore be
6559 treated as the start of the message body. The misbehaviour could have
6560 caused a number of strange effects, including loss of data in subsequent
6561 header lines, and spool format errors.
6563 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6564 client host had authenticated. This control can now be exercised by an ACL
6565 for more flexibility.
6567 69. By default, callouts do not happen when testing with -bh. There is now a
6568 variant, -bhc, which does actually run the callout code, including
6569 consulting and updating the callout cache.
6571 70. Added support for saslauthd authentication, courtesy of Alexander
6574 71. If statvfs() failed on the spool or log directories while checking their
6575 size for availability, Exim confusingly gave the error "space shortage".
6576 Furthermore, in debugging mode it crashed with a floating point exception.
6577 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6578 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6579 serious problem, Exim now writes to the main and panic logs when this
6580 happens, with details of the failure. It then refuses to accept the
6581 incoming message, giving the message "spool directory problem" or "log
6582 directory problem" with a 421 code for SMTP messages.
6584 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6585 0, 1, and 2 exist, because some OS complain for execs without them (see
6586 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6587 descriptors. However, the code omitted to check that the open succeeded,
6588 causing mysterious errors if for some reason the permissions on /dev/null
6589 got screwed. Now Exim writes a message to the main and panic logs, and
6590 bombs out if it can't open /dev/null.
6592 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6593 interact so that it is all more flexible. It is supposed to remain
6594 backwards compatible. Also added extra_local_interfaces.
6596 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6597 to bomb out with an assertion failure - to the client this appears as a
6598 connection drop. This problem occurs in the part of the code that was taken
6599 from the Samba project. Fortunately, the assertion is in a very simple
6600 function, so I have fixed this by reproducing the function inline in the
6601 one place where it is called, and arranging for authentication to fail
6602 instead of killing the process with assert().
6604 75. The SPA client code was not working when the server requested OEM rather
6605 than Unicode encoding.
6607 76. Added code to make require_files with a specific uid setting more usable in
6608 the case where statting the file as root fails - usually a non-root-mounted
6609 NFS file system. When this happens and the failure is EACCES, Exim now
6610 forks a subprocess and does the per-uid checking as the relevant uid.
6612 77. Added process_log_path.
6614 78. If log_file_path was not explicitly set, a setting of check_log_space or
6615 check_log_inodes was ignored.
6617 79. If a space check for the spool or log partitions fails, the incident is now
6618 logged. Of course, in the latter case the data may get lost...
6620 80. Added the %p formatting code to string_format() so that it can be used to
6621 print addresses in debug_print(). Adjusted all the address printing in the
6622 debugging in store.c to use %p rather than %d.
6624 81. There was a concern that a line of code in smtp_in.c could overflow a
6625 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6626 initially expressed, the concern was not well-founded, because trailing
6627 spaces are removed early. However, if the trailing spaces were followed by
6628 a NULL, they did not get removed, so the overflow was possible. Two fixes
6631 (a) I re-wrote the offending code in a cleaner fashion.
6632 (b) If an incoming SMTP command contains a NULL character, it is rejected
6635 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6636 runs initgroups(), so that if the Exim user is in any additional groups,
6637 they will be used during message reception.
6643 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob