1 Change log file for Exim from version 4.21
2 -------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
9 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
10 than -2003 did; needs libidn2 in addition to linidn.
15 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
16 supports it and a size is available (ie. the sending peer gave us one).
18 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
19 years of being deprecated). The replacements are the ACLs
20 acl_smtp_mime and acl_not_smtp_mime.
22 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
23 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
24 or even an in-clear connection were permitted. Now, if the host lookup
25 was dnssec and dane was requested then the host is only used if the
26 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
27 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
28 if one fails this test.
29 This means that a poorly-configured remote DNS will make it incommunicado;
30 but it protects against a DNS-interception attack on it.
32 JH/04 Bug 1810: make continued-use of an open smtp transport connection
33 non-noisy when a race steals the message being considered.
35 JH/05 If main configuration option tls_certificate is unset, generate a
36 self-signed certificate for inbound TLS connections.
38 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
39 in rewrites and routers.
41 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
42 and logged a warning sing 4.83; now they are a configuration file error.
44 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
45 (lacking @domain). Apply the same qualification processing as RCPT.
47 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
49 JH/10 Support ${sha256:} applied to a string (as well as the previous
52 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
53 a cutthrough deliver is pending, as we always want to make a connection.
54 This also avoids re-routing the message when later placing the cutthrough
55 connection after a verify cache hit.
56 Do not update it with the verify result either.
58 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
59 when routing results in more than one destination address.
61 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
62 signing (which inhibits the cutthrough capability). Previously only
63 the presence of an option was tested; now an expansion evaluating as
64 empty is permissible (obviously it should depend only on data available
65 when the cutthrough connection is made).
67 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
68 the relevant preceding SMTP command did not note the pipelining mode.
70 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
71 Previously they were not counted.
73 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
74 as one having no matching records. Previously we deferred the message
75 that needed the lookup.
77 JH/17 Fakereject: previously logged as a norml message arrival "<="; now
78 distinguished as "(=".
80 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
81 for missing MX records. Previously it only worked for missing A records.
83 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
85 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
86 after the data-go-ahead and data-ack. Patch from Jason Betts.
88 JH/21 Bug 1846: Send DMARC forensic reports for reject and quaratine results,
89 even for a "none" policy. Patch from Tony Meyer.
91 JH/22 Fix continued use of a connection for further deliveries. If a port was
92 specified by a router, it must also match for the delivery to be
95 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
96 When one of the recipients of a message was unsuitable for the connection
97 (has no matching addresses), we lost track of needing to mark it
98 deferred. As a result mail would be lost.
100 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
102 JH/25 Decoding ACL controls is now done using a binary search; the source code
103 takes up less space and should be simpler to maintain. Merge the ACL
104 condition decode tables also, with similar effect.
106 JH/26 Fix problem with one_time used on a redirect router which returned the
107 parent address unchanged. A retry would see the parent address marked as
108 delivered, so not attempt the (identical) child. As a result mail would
111 JH/27 Fix a possible security hole, wherein a process operating with the Exim
112 UID can gain a root shell. Credit to http://www.halfdog.net/ for
113 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
116 JH/28 Enable {spool,log} filesystem space and inode checks as default.
117 Main config options check_{log,spool}_{inodes,space} are now
118 100 inodes, 10MB unless set otherwise in the configuration.
120 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
121 Previously it only applied to the main-section connection policy
124 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
126 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
127 by me. Added RFC7919 DH primes as an alternative.
129 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
130 are not in the system include path.
132 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
133 GnuTLS, when a session startup failed (eg because the client disconnected)
134 Exim did stdio operations after fclose. This was exposed by a recent
135 change which nulled out the file handle after the fclose.
137 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
138 signed directly by the cert-signing cert, rather than an intermediate
139 OCSP-signing cert. This is the model used by LetsEncrypt.
141 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
143 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
144 an incoming connection.
146 HS/02 Bug 1802: Do not half-close the connection after sending a request
149 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
150 fallback to "prime256v1".
152 JH/34 SECURITY: Use proper copy of DATA command in error message.
153 Could leak key material. Remotely explaoitable. CVE-2016-9963.
158 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
159 and 3.4.4 - once the server is enabled to respond to an OCSP request
160 it does even when not requested, resulting in a stapling non-aware
161 client dropping the TLS connection.
163 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
164 support variable-length bit vectors. No functional change.
166 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
167 The I= interface field on outgoing lines is now after the H= remote
168 host field, same as incoming lines. There is a separate
169 outgoing_interface log selector which allows you to disable the
172 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
173 If not running log_selector +smtp_connection the mainlog would be held
174 open indefinitely after a "too many connections" event, including to a
175 deleted file after a log rotate. Leave the per net connection logging
176 leaving it open for efficiency as that will be quickly detected by the
177 check on the next write.
179 HS/01 Bug 1671: Fix post transport crash.
180 Processing the wait-<transport> messages could crash the delivery
181 process if the message IDs didn't exist for some reason. When
182 using 'split_spool_directory=yes' the construction of the spool
183 file name failed already, exposing the same netto behaviour.
185 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
186 mime_regex ACL conditions.
188 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
189 to DSN fail messages (bounces): remote IP, remote greeting, remote response
190 to HELO, local diagnostic string.
192 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
193 log line to debug. Even when configured with a tls authenticator many
194 client connections are expected to not authenticate in this way, so
195 an authenticate fail is not an error.
197 HS/02 Add the Exim version string to the process info. This way exiwhat
198 gives some more detail about the running daemon.
200 JH/06 Bug 1395: time-limit cacheing of DNS lookups, to the TTL value. This may
201 matter for fast-change records such as DNSBLs.
203 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
204 retry record, even if constant. There may be multiple transports with
205 different interface settings and the retry behaviour needs to be kept
208 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
210 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
212 JH/10 Bug 840: fix log_defer_output option of pipe transport
214 JH/11 Bug 830: use same host for all RCPTS of a message, even under
215 hosts_randomize. This matters a lot when combined with mua_wrapper.
217 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
218 ${quote_pgsql:<string>} operator.
220 JH/13 Bug 1708: avoid misaligned access in cached lookup.
222 JH/14 Change header file name for freeradius-client. Relevant if compiling
223 with Radius support; from the Gentoo tree and checked under Fedora.
225 JH/15 Bug 1712: Introduce $prdr_requested flag variable
227 JH/16 Bug 1714: Permit an empty string as expansion result for transport
228 option transport_filter, meaning no filtering.
230 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
232 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
233 defaults to "*" (all hosts). The variable is now available when not built
234 with TLS, default unset, mainly to enable keeping the testuite sane.
235 If a server certificate is not supplied (via tls_certificate) an error is
236 logged, and clients will find TLS connections fail on startup. Presumably
237 they will retry in-clear.
238 Packagers of Exim are strongly encouraged to create a server certificate
239 at installation time.
241 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
242 with the $config_file variable.
244 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
245 in transport context, after the attempt, and per-recipient. The latter type
246 is per host attempted. The event data is the error message, and the errno
247 information encodes the lookup type (A vs. MX) used for the (first) host,
248 and the trailing two digits of the smtp 4xx reponse.
250 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
251 to write to mainlog (or rejectlog, paniclog) in the window between file
252 creation and permissions/ownership being changed. Particularly affects
253 installations where exicyclog is run as root, rather than exim user;
254 result is that the running daemon panics and dies.
256 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
258 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
259 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
260 "pri" and "weight". Note that the previous implicit priority given by the
261 list order is no longer honoured.
263 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalisation
266 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
267 by defining SUPPORT_SOCKS.
269 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
270 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
271 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
272 variables are renamed to proxy_{local,external}_{address,port}.
274 JH/27 Move Internationalisation support from Experimental to mainline, enabled
275 for a build by defining SUPPORT_I18N
277 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
278 of the query string, and make ${quote_redis:} do that quoting.
280 JH/29 Move Events support from Experimental to mainline, enabled by default
281 and removable for a build by defining DISABLE_EVENT.
283 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
285 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
286 cached by the daemon.
288 JH/32 Move Redis support from Experimental to mainline, enabled for a build
289 by defining LOOKUP_REDIS. The libhiredis library is required.
291 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
292 keys are given for lookup.
294 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
295 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
296 only supported when built with TLS support. The PolarSSL SHA routines
297 are still used when the TLS library is too old for convenient support.
299 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
300 openssl_options), for security. OpenSSL forces this from version 1.1.0
301 server-side so match that on older versions.
303 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
304 allocation for $value could be released as the expansion processing
305 concluded, but leaving the global pointer active for it.
307 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
308 and to use the domains and local_parts ACL conditions.
310 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
311 incorrectly not doubled on cutthrough transmission, hence seen as a
312 body-termination at the receiving system - resulting in truncated mails.
313 Commonly the sender saw a TCP-level error, and retransmitted the message
314 via the normal store-and-forward channel. This could result in duplicates
315 received - but deduplicating mailstores were liable to retain only the
316 initial truncated version.
318 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
320 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
322 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
323 we're in there, support oversigning also; bug 1309.
325 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
327 HS/04 Add support for keep_environment and add_environment options.
329 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
330 either intentional arithmetic overflow during PRNG, or testing config-
333 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
334 delivery resulted in actual delivery. Cancel cutthrough before DATA
337 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
338 rejects a recipient: pass the reject to the originator.
340 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
341 Many were false-positives and ignorable, but it's worth fixing the
344 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
345 for the new environment-manipulation done at startup. Move the routines
346 from being local to tls.c to being global via the os.c file.
348 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
349 an extract embedded as result-arg for a map, the first arg for extract
350 is unavailable so we cannot tell if this is a numbered or keyed
351 extraction. Accept either.
357 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
360 JH/02 The smtp transport option "multi_domain" is now expanded.
362 JH/03 The smtp transport now requests PRDR by default, if the server offers
365 JH/04 Certificate name checking on server certificates, when exim is a client,
366 is now done by default. The transport option tls_verify_cert_hostnames
367 can be used to disable this per-host. The build option
368 EXPERIMENTAL_CERTNAMES is withdrawn.
370 JH/05 The value of the tls_verify_certificates smtp transport and main options
371 default to the word "system" to access the system default CA bundle.
372 For GnuTLS, only version 3.0.20 or later.
374 JH/06 Verification of the server certificate for a TLS connection is now tried
375 (but not required) by default. The verification status is now logged by
376 default, for both outbound TLS and client-certificate supplying inbound
379 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
382 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
383 Status Notification (bounce) messages are now MIME format per RFC 3464.
384 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
385 under the control of the dsn_advertise_hosts option, and routers may
386 have a dsn_lasthop option.
388 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
389 default, modifiable by a malware= option. The list separator for
390 the options can now be changed in the usual way. Bug 68.
392 JH/10 The smtp_receive_timeout main option is now expanded before use.
394 JH/11 The incoming_interface log option now also enables logging of the
395 local interface on delivery outgoing connections.
397 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
398 if the interface and destination host and port all match.
400 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
403 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
404 Patch from Andrew Lewis.
406 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
407 now supports optional time-restrictions, weighting, and priority
408 modifiers per server. Patch originally by <rommer@active.by>.
410 JH/16 The spamd_address main option now supports a mixed list of local
411 and remote servers. Remote servers can be IPv6 addresses, and
412 specify a port-range.
414 JH/17 Bug 68: The spamd_address main option now supports an optional
415 timeout value per server.
417 JH/18 Bug 1581: Router and transport options headers_add/remove can
418 now have the list separator specified.
420 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
423 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
426 JH/21 Support for the A6 type of dns record is withdrawn.
428 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
429 rather than the verbs used.
431 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
432 from 255 to 1024 chars.
434 JH/24 Verification callouts now attempt to use TLS by default.
436 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
437 are generic router options now. The defaults didn't change.
439 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
440 Original patch from Alexander Shikoff, worked over by JH.
442 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
443 files if ZCAT_COMMAND is not executable.
445 JH/26 Bug 1539: Add timout/retry options on dnsdb lookups.
447 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
449 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
450 Normally benign, it bites when the pair was led to by a CNAME;
451 modern usage is to not canoicalize the domain to a CNAME target
452 (and we were inconsistent anyway for A-only vs AAAA+A).
454 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
456 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
457 when evaluating $sender_host_dnssec.
459 JH/31 Check the HELO verification lookup for DNSSEC, adding new
460 $sender_helo_dnssec variable.
462 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
464 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
466 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
468 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
469 documented as working, but never had. Support all but $spam_report.
471 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
472 added for tls authenticator.
474 HS/03 Add perl_taintmode main config option
479 TL/01 When running the test suite, the README says that variables such as
480 no_msglog_check are global and can be placed anywhere in a specific
481 test's script, however it was observed that placement needed to be near
482 the beginning for it to behave that way. Changed the runtest perl
483 script to read through the entire script once to detect and set these
484 variables, reset to the beginning of the script, and then run through
485 the script parsing/test process like normal.
487 TL/02 The BSD's have an arc4random API. One of the functions to induce
488 adding randomness was arc4random_stir(), but it has been removed in
489 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
490 function when detected.
492 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
493 cause callback expansion.
495 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
496 syntax errors in an expansion can be treated as a string instead of
497 logging or causing an error, due to the internal use of bool_lax
498 instead of bool when processing it.
500 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
501 server certificates when making smtp deliveries.
503 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
505 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
507 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
509 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
510 Merged patch from Sebastian Wiedenroth.
512 JH/05 Fix results-pipe from transport process. Several recipients, combined
513 with certificate use, exposed issues where response data items split
514 over buffer boundaries were not parsed properly. This eventually
515 resulted in duplicates being sent. This issue only became common enough
516 to notice due to the introduction of conection certificate information,
517 the item size being so much larger. Found and fixed by Wolfgang Breyha.
519 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
520 size buffer was used, resulting in syntax errors when an expansion
523 JH/07 Add support for directories of certificates when compiled with a GnuTLS
524 version 3.3.6 or later.
526 JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef
527 is EXPERIMENTAL_EVENT, the main-configuration and transport options
528 both become "event_action", the variables become $event_name, $event_data
529 and $event_defer_errno. There is a new variable $verify_mode, usable in
530 routers, transports and related events. The tls:cert event is now also
531 raised for inbound connections, if the main configuration event_action
534 TL/06 In test suite, disable OCSP for old versions of openssl which contained
535 early OCSP support, but no stapling (appears to be less than 1.0.0).
537 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
538 server certificate names available under the smtp transport option
539 "tls_verify_cert_hostname" now do not permit multi-component wildcard
542 JH/10 Time-related extraction expansions from certificates now use the main
543 option "timezone" setting for output formatting, and are consistent
544 between OpenSSL and GnuTLS compilations. Bug 1541.
546 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
547 encoded parameter in the incoming message. Bug 1558.
549 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
550 include certificate info, eximon was claiming there were spoolfile
553 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
555 JH/14 Log delivery-related information more consistently, using the sequence
556 "H=<name> [<ip>]" wherever possible.
558 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
559 are problematic for Debian distribution, omit them from the release
562 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
564 JH/16 Fix string representation of time values on 64bit time_t anchitectures.
567 JH/17 Fix a null-indirection in certextract expansions when a nondefault
568 output list separator was used.
573 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
574 checkers that were complaining about end of non-void function with no
577 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
578 This was a regression intruduced in 4.83 by another bugfix.
580 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
582 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
583 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
589 TF/01 Correctly close the server side of TLS when forking for delivery.
591 When a message was received over SMTP with TLS, Exim failed to clear up
592 the incoming connection properly after forking off the child process to
593 deliver the message. In some situations the subsequent outgoing
594 delivery connection happened to have the same fd number as the incoming
595 connection previously had. Exim would try to use TLS and fail, logging
596 a "Bad file descriptor" error.
598 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
599 utilities have not been installed.
601 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
602 temporary space as the ACL may create new global variables.
604 TL/01 LDAP support uses per connection or global context settings, depending
605 upon the detected version of the libraries at build time.
607 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
608 to extract and use the src ip:port in logging and expansions as if it
609 were a direct connection from the outside internet. PPv2 support was
610 updated based on HAProxy spec change in May 2014.
612 JH/02 Add ${listextract {number}{list}{success}{fail}}.
614 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
615 Properly escape header and check for NULL return.
617 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
620 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
622 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
623 characters in header names, implemented as a verify condition.
624 Contributed by Michael Fischer v. Mollard.
626 TL/05 Rename SPF condition results err_perm and err_temp to standardized
627 results permerror and temperror. Previous values are deprecated but
628 still accepted. In a future release, err_perm and err_temp will be
629 completely removed, which will be a backward incompatibility if the
630 ACL tests for either of these two old results. Patch contributed by
631 user bes-internal on the mailing list.
633 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
635 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
636 selectors, in both main and reject logs.
638 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
641 JH/07 Add malware type "sock" for talking to simple daemon.
643 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
645 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
646 routers/transports under cutthrough routing.
648 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
649 numbers. Touch up "bool" conditional to keep the same definition.
651 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
653 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
655 JH/12 Expand items in router/transport headers_add or headers_remove lists
656 individually rather than the list as a whole. Bug 1452.
658 Required for reasonable handling of multiple headers_ options when
659 they may be empty; requires that headers_remove items with embedded
660 colons must have them doubled (or the list-separator changed).
662 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
663 view the policy declared in the DMARC record. Currently, $dmarc_status
664 is a combined value of both the record presence and the result of the
667 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
669 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
670 dnslookup router and the smtp transport (applying to the forward
673 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
674 of ldap servers used for a specific lookup. Patch provided by Heiko
677 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
678 New variable $lookup_dnssec_authenticated for observability.
680 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
681 Patch submitted by Lars Timman.
683 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
685 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
686 Requires trusted mode and valid format message id, aborts otherwise.
687 Patch contributed by Heiko Schlichting.
689 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
690 certextract with support for various fields. Bug 1358.
692 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
693 is requested by default, modifiable by smtp transport option
696 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
697 operate on certificate variables to give certificate fingerprints
698 Also new ${sha256:cert_variable}.
700 JH/23 The PRDR feature is moved from being Experimental into the mainline.
702 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
703 Christian Aistleitner.
705 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
707 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
708 file. Patch from Wolfgang Breyha.
710 JH/25 Expand the coverage of the delivery $host and $host_address to
711 client authenticators run in verify callout. Bug 1476.
713 JH/26 Port service names are now accepted for tls_on_connect_ports, to
714 align with daemon_smtp_ports. Bug 72.
716 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
717 support and error reporting did not work properly.
719 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
720 and is readable. Patch from Andrew Colin Kissa.
722 TL/14 Enhance documentation of ${run expansion and how it parses the
723 commandline after expansion, particularly in the case when an
724 unquoted variable expansion results in an empty value.
726 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
728 PP/02 Fix internal collision of T_APL on systems which support RFC3123
729 by renaming away from it. Addresses GH issue 15, reported by
732 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
734 TL/15 SECURITY: prevent double expansion in math comparison functions
735 (can expand unsanitized data). Not remotely exploitable.
742 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
744 PP/02 Make -n do something, by making it not do something.
745 When combined with -bP, the name of an option is not output.
747 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
750 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
751 $sender_host_name and config options to manage this, and basic check
754 PP/05 DSCP support for outbound connections and control modifier for inbound.
756 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
757 (Only plugin which currently uses this is kerberos4, which nobody should
758 be using, but we should make it available and other future plugins might
759 conceivably use it, even though it would break NAT; stuff *should* be
760 using channel bindings instead).
762 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
763 name; added for Sendmail compatibility; requires admin caller.
764 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
765 just ignore it); requires trusted caller.
766 Also parse but ignore: -Ac -Am -X<logfile>
769 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
771 TL/02 Add +smtp_confirmation as a default logging option.
773 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
774 Patch by Magnus Holmgren from 2007-02-20.
776 TL/04 Bugzilla 1281 - Spec typo.
777 Bugzilla 1283 - Spec typo.
778 Bugzilla 1290 - Spec grammar fixes.
780 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
782 TL/06 Add Experimental DMARC support using libopendmarc libraries.
784 TL/07 Fix an out of order global option causing a segfault. Reported to dev
785 mailing list by by Dmitry Isaikin.
787 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
789 JH/02 Support "G" suffix to numbers in ${if comparisons.
791 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
793 NM/01 Bugzilla 1197 - Spec typo
794 Bugzilla 1196 - Spec examples corrections
796 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
798 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
799 gnutls_enable_pkcs11, but renamed to more accurately indicate its
802 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
803 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
805 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
806 "acl {{name}{arg}...}", and optional args on acl condition
809 JH/05 Permit multiple router/transport headers_add/remove lines.
811 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
813 JH/07 Avoid using a waiting database for a single-message-only transport.
814 Performance patch from Paul Fisher. Bugzilla 1262.
816 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
819 JH/09 Add $headers_added variable, with content from use of ACL modifier
820 add_header (but not yet added to the message). Bugzilla 199.
822 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
823 Pulled from Bugzilla 817 by Wolfgang Breyha.
825 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
827 (nb: this is the same fix as in Exim 4.80.1)
829 JH/11 Add A= logging on delivery lines, and a client_set_id option on
832 JH/12 Add optional authenticated_sender logging to A= and a log_selector
835 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
837 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
838 advertise SMTP AUTH mechanism to us, instead of a generic
839 protocol violation error. Also, make Exim more robust to bad
840 data from the Dovecot auth socket.
842 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
844 When a queue runner is handling a message, Exim first routes the
845 recipient addresses, during which it prunes them based on the retry
846 hints database. After that it attempts to deliver the message to
847 any remaining recipients. It then updates the hints database using
850 So if a recipient address works intermittently, it can get repeatedly
851 deferred at routing time. The retry hints record remains fresh so the
852 address never reaches the final cutoff time.
854 This is a fairly common occurrence when a user is bumping up against
855 their storage quota. Exim had some logic in its local delivery code
856 to deal with this. However it did not apply to per-recipient defers
857 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
859 This change adds a proper retry rule check during routing so that the
860 final cutoff time is checked against the message's age. We only do
861 this check if there is an address retry record and there is not a
862 domain retry record; this implies that previous attempts to handle
863 the address had the retry_use_local_parts option turned on. We use
864 this as an approximation for the destination being like a local
865 delivery, as in LMTP.
867 I suspect this new check makes the old local delivery cutoff check
868 redundant, but I have not verified this so I left the code in place.
870 TF/02 Correct gecos expansion when From: is a prefix of the username.
872 Test 0254 submits a message to Exim with the header
876 When I ran the test suite under the user fanf2, Exim expanded
877 the header to contain my full name, whereas it should have added
878 a Resent-Sender: header. It erroneously treats any prefix of the
879 username as equal to the username.
881 This change corrects that bug.
883 GF/01 DCC debug and logging tidyup
884 Error conditions log to paniclog rather than rejectlog.
885 Debug lines prefixed by "DCC: " to remove any ambiguity.
887 TF/03 Avoid unnecessary rebuilds of lookup-related code.
889 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
890 Bug spotted by Jeremy Harris; was flawed since initial commit.
891 Would have resulted in OCSP responses post-SNI triggering an Exim
892 NULL dereference and crash.
894 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
896 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
897 Bug detection, analysis and fix by Samuel Thibault.
898 Bugzilla 1331, Debian bug #698092.
900 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
902 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
903 Server implementation by Todd Lyons, client by JH.
904 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
905 config variable "prdr_enable" controls whether the server
906 advertises the facility. If the client requests PRDR a new
907 acl_data_smtp_prdr ACL is called once for each recipient, after
908 the body content is received and before the acl_smtp_data ACL.
909 The client is controlled by bolth of: a hosts_try_prdr option
910 on the smtp transport, and the server advertisement.
911 Default client logging of deliveries and rejections involving
912 PRDR are flagged with the string "PRDR".
914 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
915 fclose(). Diagnosis by Todd Lyons.
917 PP/17 Update configure.default to handle IPv6 localhost better.
918 Patch by Alain Williams (plus minor tweaks).
921 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
922 This is now consistent with GnuTLS, and is now documented: the
923 previous undocumented portable approach to treating the option as
924 unset was to force an expansion failure. That still works, and
925 an empty string is now equivalent.
927 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
928 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
929 not performing validation itself.
931 PP/20 Added force_command boolean option to pipe transport.
932 Patch from Nick Koston, of cPanel Inc.
934 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
937 TF/04 Added udpsend ACL modifer and hexquote expansion operator
939 PP/21 Fix eximon continuous updating with timestamped log-files.
940 Broken in a format-string cleanup in 4.80, missed when I repaired the
941 other false fix of the same issue.
942 Report and fix from Heiko Schlichting.
945 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
946 Report from Prashanth Katuri.
948 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
949 It's SecureTransport, so affects any MacOS clients which use the
950 system-integrated TLS libraries, including email clients.
952 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
953 using a MIME ACL for non-SMTP local injection.
954 Report and assistance in diagnosis by Warren Baker.
956 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
958 JH/16 Fix comparisons for 64b. Bugzilla 1385.
960 TL/09 Add expansion variable $authenticated_fail_id to keep track of
961 last id that failed so it may be referenced in subsequent ACL's.
963 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
966 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
967 ldap library initialization, allowing self-signed CA's to be
968 used. Also properly sets require_cert option later in code by
969 using NULL (global ldap config) instead of ldap handle (per
970 session). Bug diagnosis and testing by alxgomz.
972 TL/12 Enhanced documentation in the ratelimit.pl script provided in
973 the src/util/ subdirectory.
975 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
976 renamed to Transport Post Delivery Action by Jeremy Harris, as
979 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
980 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
981 redis_servers = needs to be configured which will be used by the redis
982 lookup. Patch from Warren Baker, of The Packet Hub.
984 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
986 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
987 hostname or reverse DNS when processing a host list. Used suggestions
988 from multiple comments on this bug.
990 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
992 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
993 Missed a few lines, added it to make the runtest require no keyboard
996 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
997 contains upper case chars. Make router use caseful_local_part.
999 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1000 support when GnuTLS has been built with p11-kit.
1006 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1008 This, or similar/improved, will also be change PP/11 of 4.82.
1014 PP/01 Handle short writes when writing local log-files.
1015 In practice, only affects FreeBSD (8 onwards).
1016 Bugzilla 1053, with thanks to Dmitry Isaikin.
1018 NM/01 Bugzilla 949 - Documentation tweak
1020 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1023 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1025 PP/02 Implemented gsasl authenticator.
1027 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1029 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1030 `pkg-config foo` for cflags/libs.
1032 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1033 with rest of GSASL and with heimdal_gssapi.
1035 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1036 `pkg-config foo` for cflags/libs for the TLS implementation.
1038 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1039 properties get this fed in as external SSF. A number of robustness
1040 and debugging improvements to the cyrus_sasl authenticator.
1042 PP/08 cyrus_sasl server now expands the server_realm option.
1044 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1045 Patch by Jeremy Harris.
1047 PP/10 Added dbmjz lookup type.
1049 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1051 PP/12 MAIL args handles TAB as well as SP, for better interop with
1052 non-compliant senders.
1053 Analysis and variant patch by Todd Lyons.
1055 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1056 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1057 Patch from Dirk Mueller <dmueller@suse.com>
1059 PP/13 tls_peerdn now print-escaped for spool files.
1060 Observed some $tls_peerdn in wild which contained \n, which resulted
1061 in spool file corruption.
1063 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1064 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1065 or write after TLS renegotiation, which otherwise led to messages
1068 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1069 as a tracking header (ie: a signed header comes before the signature).
1070 Patch from Wolfgang Breyha.
1072 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1073 comma-sep list; embedded commas doubled.
1075 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1077 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1079 Report and patch from Dmitry Banschikov.
1081 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
1082 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1083 failures. We appear to now support TLS1.1+ with Exim.
1085 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1086 lets Exim select keys and certificates based upon TLS SNI from client.
1087 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1088 before an outbound SMTP session. New log_selector, +tls_sni.
1090 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1091 NULL dereference. Report and patch from Alun Jones.
1093 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1094 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1095 Not seeing resolver debug output on NetBSD, but suspect this is a
1096 resolver implementation change.
1098 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1099 Left warnings. Added "eximon gdb" invocation mode.
1101 PP/21 Defaulting "accept_8bitmime" to true, not false.
1103 PP/22 Added -bw for inetd wait mode support.
1105 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1106 locate the relevant includes and libraries. Made this the default.
1108 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1109 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1111 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1112 This may cause build issues on older platforms.
1114 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1115 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1116 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1117 Added SNI support via GnuTLS too.
1118 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1120 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1122 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1123 Applied second patch from Janne, implementing suggestion to default
1124 multiple-strings-in-record handling to match SPF spec.
1126 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1128 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1129 read-only, out of scope).
1130 Patch from Wolfgang Breyha, report from Stuart Northfield.
1132 PP/29 Fix three issues highlighted by clang analyser static analysis.
1133 Only crash-plausible issue would require the Cambridge-specific
1134 iplookup router and a misconfiguration.
1135 Report from Marcin Mirosław.
1137 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1139 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1140 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1141 As part of this, removing so much warning spew let me fix some minor
1142 real issues in debug logging.
1144 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1145 assignment on my part. Fixed.
1147 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1148 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1149 Janne Snabb (who went above and beyond: thank you).
1151 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1152 string otherwise requires a connection and a bunch more work and it's
1153 relatively easy to get wrong. Should also expose TLS library linkage
1156 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1157 64-bit ${eval} (JH/03).
1159 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1160 GNU libc to support some of the 64-bit stuff, should not lead to
1161 conflicts. Defined before os.h is pulled in, so if a given platform
1162 needs to override this, it can.
1164 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1165 protection layer was required, which is not implemented.
1166 Bugzilla 1254, patch from Wolfgang Breyha.
1168 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1169 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1170 tls_dhparam take prime identifiers. Also unbreak combination of
1171 OpenSSL+DH_params+TLSSNI.
1173 PP/39 Disable SSLv2 by default in OpenSSL support.
1179 PP/01 Solaris build fix for Oracle's LDAP libraries.
1180 Bugzilla 1109, patch from Stephen Usher.
1182 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1184 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1187 TF/02 Fix a couple more cases where we did not log the error message
1188 when unlink() failed. See also change 4.74-TF/03.
1190 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1191 lock up or crash if it happened to be inside a call to libc when it
1192 got a SIGUSR1 from exiwhat.
1194 The SIGUSR1 handler appends the current process status to the process
1195 log which is later printed by exiwhat. It used to use the general
1196 purpose logging code to do this, but several functions it calls are
1197 not safe for signals.
1199 The new output code in the SIGUSR1 handler is specific to the process
1200 log, and simple enough that it's easy to inspect for signal safety.
1201 Removing some special cases also simplifies the general logging code.
1202 Removing the spurious timestamps from the process log simplifies
1205 TF/04 Improved ratelimit ACL condition.
1207 The /noupdate option has been deprecated in favour of /readonly which
1208 has clearer semantics. The /leaky, /strict, and /readonly update modes
1209 are mutually exclusive. The update mode is no longer included in the
1210 database key; it just determines when the database is updated. (This
1211 means that when you upgrde Exim will forget old rate measurements.)
1213 Exim now checks that the per_* options are used with an update mode that
1214 makes sense for the current ACL. For example, when Exim is processing a
1215 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1216 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1217 must specify per_mail/readonly. If you omit the update mode it defaults to
1218 /leaky where that makes sense (as before) or /readonly where required.
1220 The /noupdate option is now undocumented but still supported for
1221 backwards compatibility. It is equivalent to /readonly except that in
1222 ACLs where /readonly is required you may specify /leaky/noupdate or
1223 /strict/noupdate which are treated the same as /readonly.
1225 A useful new feature is the /count= option. This is a generalization
1226 of the per_byte option, so that you can measure the throughput of other
1227 aggregate values. For example, the per_byte option is now equivalent
1228 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1230 The per_rcpt option has been generalized using the /count= mechanism
1231 (though it's more complicated than the per_byte equivalence). When it is
1232 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1233 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1234 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1235 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1236 Note that using per_rcpt with a non-readonly update mode in more than
1237 one ACL will cause the recipients to be double-counted. (The per_mail
1238 and per_byte options don't have this problem.)
1240 The handling of very low rates has changed slightly. If the computed rate
1241 is less than the event's count (usually one) then this event is the first
1242 after a long gap. In this case the rate is set to the same as this event's
1243 count, so that the first message of a spam run is counted properly.
1245 The major new feature is a mechanism for counting the rate of unique
1246 events. The new per_addr option counts the number of different
1247 recipients that someone has sent messages to in the last time period. It
1248 behaves like per_rcpt if all the recipient addresses are different, but
1249 duplicate recipient addresses do not increase the measured rate. Like
1250 the /count= option this is a general mechanism, so the per_addr option
1251 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1252 example, measure the rate that a client uses different sender addresses
1253 with the options per_mail/unique=$sender_address. There are further
1254 details in the main documentation.
1256 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1258 TF/06 Removed a few PCRE remnants.
1260 TF/07 Automatically extract Exim's version number from tags in the git
1261 repository when doing development or release builds.
1263 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1264 Bugzilla 879. Patch from Paul Fisher.
1266 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1267 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1270 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1272 PP/05 Variable $av_failed, true if the AV scanner deferred.
1273 Bugzilla 1078. Patch from John Horne.
1275 PP/06 Stop make process more reliably on build failure.
1276 Bugzilla 1087. Patch from Heiko Schlittermann.
1278 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1279 Bugzilla 1089. Patch from Heiko Schlittermann.
1281 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1282 Bugzilla 1131. Patch from Holger Weiß.
1284 PP/09 Handle IPv6 addresses with SPF.
1285 Bugzilla 860. Patch from Wolfgang Breyha.
1287 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1289 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1292 PP/11 match_* no longer expand right-hand-side by default.
1293 New compile-time build option, EXPAND_LISTMATCH_RHS.
1294 New expansion conditions, "inlist", "inlisti".
1296 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1298 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1300 PP/14 fix log_write() format string regression from TF/03.
1301 Bugzilla 1152. Patch from Dmitry Isaikin.
1307 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1309 PP/02 Harmonised TLS library version reporting; only show if debugging.
1310 Layout now matches that introduced for other libraries in 4.74 PP/03.
1312 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1314 PP/04 New "dns_use_edns0" global option.
1316 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1319 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1320 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1322 TK/01 Updated PolarSSL code to 0.14.2.
1323 Bugzilla 1097. Patch from Andreas Metzler.
1325 PP/07 Catch divide-by-zero in ${eval:...}.
1326 Fixes bugzilla 1102.
1328 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1331 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1332 format-string attack -- SECURITY: remote arbitrary code execution.
1334 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1335 time unintentionally subject to list matching rules, letting the header
1336 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1337 arbitrary string expansion). This allowed for information disclosure.
1339 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1340 INT_MIN/-1 -- value coerced to INT_MAX.
1346 NM/01 Workround for PCRE version dependency in version reporting
1349 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1350 This fixes portability to compilers other than gcc, notably
1351 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1353 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1354 makefiles for portability to HP-UX and POSIX correctness.
1356 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1357 Also via indented variable definition in the Makefile.
1358 (Debugging by Oliver Heesakkers).
1360 PP/02 Restore caching of spamd results with expanded spamd_address.
1361 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1363 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1364 Improves build reliability. Fix from: Frank Elsner
1366 NM/02 Fix wide character breakage in the rfc2047 coding
1367 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1369 NM/03 Allow underscore in dnslist lookups
1370 Fixes bug 1026. Patch from Graeme Fowler
1372 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1373 Code patches from Adam Ciarcinski of NetBSD.
1375 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1378 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1379 is logged, to avoid truncation. Patch from John Horne.
1381 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1382 Patch from Jakob Hirsch.
1384 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1385 SQL string expansion failure details.
1386 Patch from Andrey Oktyabrski.
1388 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1389 Patch from Simon Arlott.
1391 PP/09 New lookups functionality failed to compile on old gcc which rejects
1392 extern declarations in function scope.
1393 Patch from Oliver Fleischmann
1395 PP/10 Use sig_atomic_t for flags set from signal handlers.
1396 Check getgroups() return and improve debugging.
1397 Fixed developed for diagnosis in bug 927 (which turned out to be
1400 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1401 Patch from Mark Zealey.
1403 PP/12 Bugzilla 1056: Improved spamd server selection.
1404 Patch from Mark Zealey.
1406 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1407 Based on patch from Heiko Schlittermann.
1409 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1410 Patch from Uwe Doering, sign-off by Michael Haardt.
1412 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1413 variable declaration deep within a block. Bug and patch from
1416 PP/15 lookups-Makefile IRIX compatibilty coercion.
1418 PP/16 Make DISABLE_DKIM build knob functional.
1420 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1421 Patch by Simon Arlott
1423 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1424 variable argument macros. Our copy now differs from upstream.
1430 TF/01 Failure to get a lock on a hints database can have serious
1431 consequences so log it to the panic log.
1433 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1434 controlled using the smtp_confirmation log selector.
1436 TF/03 Include the error message when we fail to unlink a spool file.
1438 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1439 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1440 for maintaining out-of-tree patches for some time.
1442 PP/01 Bugzilla 139: Documentation and portability issues.
1443 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1444 Handle per-OS dynamic-module compilation flags.
1446 PP/02 Let /dev/null have normal permissions.
1447 The 4.73 fixes were a little too stringent and complained about the
1448 permissions on /dev/null. Exempt it from some checks.
1449 Reported by Andreas M. Kirchwitz.
1451 PP/03 Report version information for many libraries, including
1452 Exim version information for dynamically loaded libraries. Created
1453 version.h, now support a version extension string for distributors
1454 who patch heavily. Dynamic module ABI change.
1456 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1457 privilege escalation vulnerability whereby the Exim run-time user
1458 can cause root to append content of the attacker's choosing to
1461 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1464 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1465 If dropping privileges for untrusted macros, we disabled normal logging
1466 on the basis that it would fail; for the Exim run-time user, this is not
1467 the case, and it resulted in successful deliveries going unlogged.
1468 Fixed. Reported by Andreas Metzler.
1474 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1475 only prepend for the Resent-* case. Fixes regression introduced in
1476 Exim 4.70 by NM/22 for Bugzilla 607.
1478 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1479 increasing numbers of administrators be bitten by this.
1481 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1483 PP/03 Bugzilla 994: added openssl_options main configuration option.
1485 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1487 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1489 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1491 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1492 without a peer certificate, leading to a segfault because of an
1493 assumption that peers always have certificates. Be a little more
1494 paranoid. Problem reported by Martin Tscholak.
1496 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1497 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1498 NB: ClamAV planning to remove STREAM in "middle of 2010".
1499 CL also introduces -bmalware, various -d+acl logging additions and
1500 more caution in buffer sizes.
1502 PP/09 Implemented reverse_ip expansion operator.
1504 PP/10 Bugzilla 937: provide a "debug" ACL control.
1506 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1508 PP/12 Bugzilla 973: Implement --version.
1510 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1512 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1514 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1516 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1517 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1518 ignore trailing whitespace.
1520 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1522 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1525 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1526 Notification from Dr Andrew Aitchison.
1528 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1529 ExtendedDetectionInfo response format.
1530 Notification from John Horne.
1532 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1535 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1536 XSL and documented dependency on system catalogs, with examples of how
1539 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1542 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1543 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1544 configuration file which is writeable by the Exim user or group.
1546 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1547 of configuration files to cover files specified with the -C option if
1548 they are going to be used with root privileges, not just the default
1551 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1552 option (effectively making it always true).
1554 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1555 files to be used while preserving root privileges.
1557 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1558 that rogue child processes cannot use them.
1560 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1561 run-time user, instead of root.
1563 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1564 Exim run-time user without dropping privileges.
1566 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1567 result string, instead of calling string_vformat() twice with the same
1570 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1571 for other users. Others should always drop root privileges if they use
1572 -C on the command line, even for a whitelisted configure file.
1574 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1576 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1582 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1583 $data_path, and $header_path variables; fixed documentation bugs and
1586 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1587 exipick to access non-standard spools, including the "frozen" queue
1590 NM/01 Bugzilla 965: Support mysql stored procedures.
1591 Patch from Alain Williams
1593 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1595 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1596 Patch from Andreas Metzler
1598 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1599 Patch from Kirill Miazine
1601 NM/05 Bugzilla 671: Added umask to procmail example.
1603 JJ/03 installed exipick 20100323.0, fixing doc bug
1605 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1606 directory. Notification and patch from Dan Rosenberg.
1608 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1610 TK/02 Improve log output when DKIM signing operation fails.
1612 MH/01 Treat the transport option dkim_domain as a colon separated
1613 list, not as a single string, and sign the message with each element,
1614 omitting multiple occurences of the same signer.
1616 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1617 Bugzilla 985, 986. Patch by Simon Arlott
1619 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1620 Patch by Simon Arlott
1622 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1623 MBX locking. Notification from Dan Rosenberg.
1629 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1631 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1633 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1635 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1637 NM/04 Bugzilla 915: Flag broken perl installation during build.
1643 TK/01 Added patch by Johannes Berg that expands the main option
1644 "spamd_address" if it starts with a dollar sign.
1646 TK/02 Write list of recipients to X-Envelope-Sender header when building
1647 the mbox-format spool file for content scanning (suggested by Jakob
1650 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1651 (http://www.dcc-servers.net/) support via dccifd. Activated by
1652 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1654 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1655 by Mark Daniel Reidel <mr@df.eu>.
1657 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1658 When building exim an external PCRE library is now needed -
1659 PCRE is a system library on the majority of modern systems.
1660 See entry on PCRE_LIBS in EDITME file.
1662 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1663 conversation. Added nologin parameter to request.
1664 Patch contributed by Kirill Miazine.
1666 TF/01 Do not log submission mode rewrites if they do not change the address.
1668 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1670 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1671 log files in place. Contributed by Roberto Lima.
1673 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1675 TF/03 Bugzilla 615: When checking the local_parts router precondition
1676 after a local_part_suffix or local_part_prefix option, Exim now
1677 does not use the address's named list lookup cache, since this
1678 contains cached lookups for the whole local part.
1680 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1681 Robert Millan. Documentation is in experimental-spec.txt.
1683 TF/04 Bugzilla 668: Fix parallel build (make -j).
1685 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1687 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1688 Patch provided by Jan Srzednicki.
1690 TF/05 Leading white space used to be stripped from $spam_report which
1691 wrecked the formatting. Now it is preserved.
1693 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1694 that they are available at delivery time.
1696 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1698 TF/08 TLS error reporting now respects the incoming_interface and
1699 incoming_port log selectors.
1701 TF/09 Produce a more useful error message if an SMTP transport's hosts
1702 setting expands to an empty string.
1704 NM/06 Bugzilla 744: EXPN did not work under TLS.
1705 Patch provided by Phil Pennock.
1707 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1708 Patch provided by Richard Godbee.
1710 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1711 acl_smtp_notquit, added index entry.
1713 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1714 Patch provided by Eugene Bujak.
1716 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1717 accept(). Patch provided by Maxim Dounin.
1719 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1720 Patch provided by Phil Pennock.
1722 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1724 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1725 Patch provided by Brad "anomie" Jorsch.
1727 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1728 Patch provided by Dean Brooks.
1730 TK/05 Add native DKIM support (does not depend on external libraries).
1732 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1733 Patch provided by Graeme Fowler.
1735 NM/16 Bugzilla 851: Documentation example syntax fix.
1737 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1739 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1742 NM/19 Bugzilla 745: TLS version reporting.
1743 Patch provided by Phil Pennock.
1745 NM/20 Bugzilla 167: bool: condition support.
1746 Patch provided by Phil Pennock.
1748 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1749 clients. Patch provided by Phil Pennock.
1751 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1752 Patch provided by Brad "anomie" Jorsch.
1754 NM/23 Bugzilla 687: Fix misparses in eximstats.
1755 Patch provided by Heiko Schlittermann.
1757 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1758 Patch provided by Heiko Schlittermann.
1760 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1761 plus update to original patch.
1763 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1765 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1766 Patch provided by David Brownlee.
1768 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1770 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1772 NM/30 Bugzilla 888: TLS documentation bugfixes.
1774 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1776 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1777 Unlike the original bugzilla I have changed all shell scripts in src tree.
1779 NM/33 Bugzilla 898: Transport filter timeout fix.
1780 Patch by Todd Rinaldo.
1782 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1783 Patch by Serge Demonchaux.
1785 NM/35 Bugzilla 39: Base64 decode bug fixes.
1786 Patch by Jakob Hirsch.
1788 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1790 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1792 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1794 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1800 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1801 ALT-N's libdkim that I have put here:
1802 http://duncanthrax.net/exim-experimental/
1804 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1805 were called 'true' and it seems that C99 defines that as a reserved
1806 keyword to be used with 'bool' variable types. That means you could
1807 not include C99-style headers which use bools without triggering
1808 build errors in sieve.c.
1810 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1811 as mailq or other aliases. Changed the --help handling significantly
1812 to do whats expected. exim_usage() emits usage/help information.
1814 SC/01 Added the -bylocaldomain option to eximstats.
1816 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1818 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1820 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1826 PH/01 Another patch from the Sieve maintainer.
1828 PH/02 When an IPv6 address is converted to a string for single-key lookup
1829 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1830 dots are used instead of colons so that keys in lsearch files need not
1831 contain colons. This was done some time before quoting was made available
1832 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1833 (notated using the quote facility) so as to distinguish them from IPv4
1834 keys. This meant that lookups for IP addresses in host lists did not work
1835 for iplsearch lookups.
1837 This has been fixed by arranging for IPv6 addresses to be expressed with
1838 colons if the lookup type is iplsearch. This is not incompatible, because
1839 previously such lookups could never work.
1841 The situation is now rather anomolous, since one *can* have colons in
1842 ordinary lsearch keys. However, making the change in all cases is
1843 incompatible and would probably break a number of configurations.
1845 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1848 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1849 conversion specification without a maximum field width, thereby enabling
1850 a rogue spamd server to cause a buffer overflow. While nobody in their
1851 right mind would setup Exim to query an untrusted spamd server, an
1852 attacker that gains access to a server running spamd could potentially
1853 exploit this vulnerability to run arbitrary code as the Exim user.
1855 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1856 $primary_hostname instead of what libspf2 thinks the hosts name is.
1858 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1859 a directory entry by the name of the lookup key. Previously, if a
1860 symlink pointed to a non-existing file or a file in a directory that
1861 Exim lacked permissions to read, a lookup for a key matching that
1862 symlink would fail. Now it is enough that a matching directory entry
1863 exists, symlink or not. (Bugzilla 503.)
1865 PH/03 The body_linecount and body_zerocount variables are now exported in the
1868 PH/04 Added the $dnslist_matched variable.
1870 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1871 This means they are set thereafter only if the connection becomes
1874 PH/06 Added the client_condition to authenticators so that some can be skipped
1875 by clients under certain conditions.
1877 PH/07 The error message for a badly-placed control=no_multiline_responses left
1878 "_responses" off the end of the name.
1880 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1882 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1883 (without spaces) instead of just copying the configuration text.
1885 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1887 PH/11 Added $max_received_linelength.
1889 PH/12 Added +ignore_defer and +include_defer to host lists.
1891 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1892 way in which PCRE > 7.0 is built.
1894 PH/14 Implemented queue_only_load_latch.
1896 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1897 MAIL command. The effect was to mangle the value on 64-bit systems.
1899 PH/16 Another patch from the Sieve maintainer.
1901 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1903 PH/18 If a system quota error occurred while trying to create the file for
1904 a maildir delivery, the message "Mailbox is full" was not appended to the
1905 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1906 only to a quota excession during the actual writing of the file.
1908 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1909 characters?) which causes problems in log lines. The DN values are now
1910 passed through string_printing() before being added to log lines.
1912 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1913 and InterBase are left for another time.)
1915 PH/21 Added message_body_newlines option.
1917 PH/22 Guard against possible overflow in moan_check_errorcopy().
1919 PH/23 POSIX allows open() to be a macro; guard against that.
1921 PH/24 If the recipient of an error message contained an @ in the local part
1922 (suitably quoted, of course), incorrect values were put in $domain and
1923 $local_part during the evaluation of errors_copy.
1929 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1930 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1933 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1934 issue a MAIL command.
1936 PH/02 In an ACL statement such as
1938 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1940 if a client was not listed at all, or was listed with a value other than
1941 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1942 the condition was not true (as it should be), so access was not denied.
1943 The bug was that the ! inversion was incorrectly passed on to the second
1944 item. This has been fixed.
1946 PH/03 Added additional dnslists conditions == and =& which are different from
1947 = and & when the dns lookup returns more than one IP address.
1949 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1950 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1952 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1953 FSYNC, which compiles an option called disable_fsync that allows for
1954 bypassing fsync(). The documentation is heavily laced with warnings.
1956 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1958 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1959 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1960 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1961 including adding "make clean"; (3) Added -fPIC when compiling the test
1962 dynamically loaded module, to get rid of a warning.
1964 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1965 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1966 = 0s. The bug is otherwise harmless.
1968 PH/07 There was a bug in the dovecot authenticator such that the value of
1969 $auth1 could be overwritten, and so not correctly preserved, after a
1970 successful authentication. This usually meant that the value preserved by
1971 the server_setid option was incorrect.
1973 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1975 PH/09 Installed PCRE release 7.0.
1977 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1978 run for batched SMTP input. It is now run at the start of every message
1979 in the batch. While fixing this I discovered that the process information
1980 (output by running exiwhat) was not always getting set for -bs and -bS
1981 input. This is fixed, and it now also says "batched" for BSMTP.
1983 PH/11 Added control=no_pipelining.
1985 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1986 patch, slightly modified), and move the expansion of helo_data till after
1987 the connection is made in the smtp transport (so it can use these
1990 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1992 PH/14 Added log_selector = +pid.
1994 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1996 PH/16 Add ${if forany and ${if forall.
1998 PH/17 Added dsn_from option to vary the From: line in DSNs.
2000 PH/18 Flush SMTP output before performing a callout, unless control =
2001 no_callout_flush is set.
2003 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2004 was true (the default) a successful delivery failed to delete the retry
2005 item, thus causing premature timeout of the address. The bug is now
2008 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2010 PH/21 Long custom messages for fakedefer and fakereject are now split up
2011 into multiline reponses in the same way that messages for "deny" and
2012 other ACL rejections are.
2014 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2015 with slight modification.
2017 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2018 draft, changing the syntax and factoring some duplicate code".
2020 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2021 for deliveries of the second and subsequent messages over the same SMTP
2024 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2025 ${reduce, with only minor "tidies".
2027 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2029 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2030 expansion side effects.
2032 PH/27 When a message times out after an over-quota error from an Exim-imposed
2033 quota, the bounce message says "mailbox is full". This message was not
2034 being given when it was a system quota that was exceeded. It now should
2037 MH/03 Made $recipients available in local_scan(). local_scan() already has
2038 better access to the recipient list through recipients_list[], but
2039 $recipients can be useful in postmaster-provided expansion strings.
2041 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2042 in the case of a MAIL command with additional options following the
2043 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2044 were accidentally chopped off.
2046 PH/29 SMTP synchronization checks are implemented when a command is read -
2047 there is a check that no more input is waiting when there shouldn't be
2048 any. However, for some commands, a delay in an ACL can mean that it is
2049 some time before the response is written. In this time, more input might
2050 arrive, invalidly. So now there are extra checks after an ACL has run for
2051 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2052 pipelining has not been advertised.
2054 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2056 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2057 returned in the SMTP response when smtp_return_error_details was false.
2058 This has been fixed.
2060 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2061 instead of the C I/O that was originally supplied, because problems were
2062 reported on Solaris.
2064 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2065 Exim which did not show up earlier: it was assuming that a call to
2066 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2067 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2068 was a macro that became an assignment, so it seemed to work. This has
2069 changed to a proper function call with a void return, hence the compile
2070 error. Exim's code has been fixed.
2072 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2075 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2077 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2079 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2080 because it turns out to be too big or there is a timeout) there is no
2081 "Completed" line in the log. When some messages of this type were
2082 selected by exigrep, they were listed as "not completed". Others were
2083 picked up by some special patterns. I have improved the selection
2084 criteria to be more general.
2086 PH/38 The host_find_failed option in the manualroute router can now be set
2087 to "ignore", to completely ignore a host whose IP address cannot be
2088 found. If all hosts are ignored, the behaviour is controlled by the new
2089 host_all_ignored option.
2091 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2092 homing or because of multiple MX records with /mx) generated more than
2093 one IP address, and the following item turned out to be the local host,
2094 all the secondary addresses of the first item were incorrectly removed
2095 from the list, along with the local host and any following hosts (which
2096 is what is supposed to happen).
2098 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2099 whoever called Exim into the -H file. In the case of the daemon it was
2100 behaving confusingly. When first started, it used values for whoever
2101 started the daemon, but after a SIGHUP it used the Exim user (because it
2102 calls itself on a restart). I have changed the code so that it now always
2105 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2106 message are rejected with the same error (e.g. no authentication or bad
2107 sender address), and a DATA command is nevertheless sent (as can happen
2108 with PIPELINING or a stupid MUA), the error message that was given to the
2109 RCPT commands is included in the rejection of the DATA command. This is
2110 intended to be helpful for MUAs that show only the final error to their
2113 PH/42 Another patch from the Sieve maintainer.
2115 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2116 Eximstats - Fixed some broken HTML links and added missing column headers
2118 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2119 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2121 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2123 PH/43 Yet another patch from the Sieve maintainer.
2125 PH/44 I found a way to check for a TCP/IP connection going away before sending
2126 the response to the final '.' that terminates a message, but only in the
2127 case where the client has not sent further data following the '.'
2128 (unfortunately, this is allowed). However, in many cases there won't be
2129 any further data because there won't be any more messages to send. A call
2130 to select() can be used: if it shows that the input is "ready", there is
2131 either input waiting, or the socket has been closed. An attempt to read
2132 the next input character can distinguish the two cases. Previously, Exim
2133 would have sent an OK response which the client would never have see.
2134 This could lead to message repetition. This fix should cure that, at
2135 least in a lot of common cases.
2137 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2138 advertised in response to EHLO.
2144 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2145 fixed by 4.65/MH/01 (is this a record?) are fixed:
2147 (i) An empty string was always treated as zero by the numeric comparison
2148 operators. This behaviour has been restored.
2150 (ii) It is documented that the numeric comparison operators always treat
2151 their arguments as decimal numbers. This was broken in that numbers
2152 starting with 0 were being interpreted as octal.
2154 While fixing these problems I realized that there was another issue that
2155 hadn't been noticed. Values of message_size_limit (both the global option
2156 and the transport option) were treated as octal if they started with 0.
2157 The documentation was vague. These values are now always treated as
2158 decimal, and I will make that clear in the documentation.
2164 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2165 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2168 MH/01 Don't check that the operands of numeric comparison operators are
2169 integers when their expansion is in "skipping" mode (fixes bug
2170 introduced by 4.64-PH/07).
2172 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2173 child addresses, Exim now panics and dies. Previously, because the count
2174 is held in a short int, deliveries were likely to be lost. As such a
2175 large number of recipients for a single message is ridiculous
2176 (performance will be very, very poor), I have chosen to impose a limit
2177 rather than extend the field.
2183 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2184 leftover -K file (the existence of which was triggered by #402).
2185 While we were at it, introduced process PID as part of the -K
2186 filename. This should rule out race conditions when creating
2189 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2190 processing considerably. Previous code took too long for large mails,
2191 triggering a timeout which in turn triggers #401.
2193 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2194 in the DK code in transports.c. sendfile() is not really portable,
2195 hence the _LINUX specificness.
2197 TF/01 In the add_headers option to the mail command in an Exim filter,
2198 there was a bug that Exim would claim a syntax error in any
2199 header after the first one which had an odd number of characters
2202 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2203 callout verification, Exim cached a "reject" for the entire domain. This
2204 is correct for most verifications, but it is not correct for a recipient
2205 verification with use_sender or use_postmaster set, because in that case
2206 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2207 case of MAIL FROM:<> rejection from other early rejections (e.g.
2208 rejection of HELO). When verifying a recipient using a non-null MAIL
2209 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2210 Whatever the result of the callout, the value of the domain cache is
2211 left unchanged (for any other kind of callout, getting as far as trying
2212 RCPT means that the domain itself is ok).
2214 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2217 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2218 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2219 session, the daemon ignores ECONNECT errors and logs others; it now
2220 ignores EPIPE as well.
2222 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2223 (quoted-printable decoding).
2225 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2226 later the small subsequent patch to fix an introduced bug.
2228 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2230 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2232 PH/08 An error is now given if message_size_limit is specified negative.
2234 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2235 to be given (somewhat) arbitrary names.
2237 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2240 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2241 miscellaneous code fixes
2243 PH/10 Added the log_reject_target ACL modifier to specify where to log
2246 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2247 hostname. This is wrong, because it relates to the incoming message (and
2248 probably the interface on which it is arriving) and not to the outgoing
2249 callout (which could be using a different interface). This has been
2250 changed to use the value of the helo_data option from the smtp transport
2251 instead - this is what is used when a message is actually being sent. If
2252 there is no remote transport (possible with a router that sets up host
2253 addresses), $smtp_active_hostname is used.
2255 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2256 tweaks were necessary in order to get it to work (see also 21 below):
2257 (a) The code assumed that strncpy() returns a negative number on buffer
2258 overflow, which isn't the case. Replaced with Exim's string_format()
2260 (b) There were several signed/unsigned issues. I just did the minimum
2261 hacking in of casts. There is scope for a larger refactoring.
2262 (c) The code used strcasecmp() which is not a standard C function.
2263 Replaced with Exim's strcmpic() function.
2264 (d) The code set only $1; it now sets $auth1 as well.
2265 (e) A simple test gave the error "authentication client didn't specify
2266 service in request". It would seem that Dovecot has changed its
2267 interface. Fortunately there's a specification; I followed it and
2268 changed what the client sends and it appears to be working now.
2270 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2273 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2274 address A is aliased to B and C, where B exists and C does not. Without
2275 -v the output is "A verified" because verification stops after a
2276 successful redirection if more than one address is generated. However,
2277 with -v the child addresses are also verified. Exim was outputting "A
2278 failed to verify" and then showing the successful verification for C,
2279 with its parentage. It now outputs "B failed to verify", showing B's
2280 parentage before showing the successful verification of C.
2282 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2283 look up a TXT record in a specific list after matching in a combined
2286 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2287 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2288 they consult the DNS. I had assumed they would set it the way they
2289 wanted; and indeed my experiments on Linux seem to show that in some
2290 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2291 To be on the safe side, however, I have now made the interface to
2292 host_find_byname() similar to host_find_bydns(), with an argument
2293 containing the DNS resolver options. The host_find_byname() function now
2294 sets these options at its start, just as host_find_bydns() does. The smtp
2295 transport options dns_qualify_single and dns_search_parents are passed to
2296 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2297 of host_find_byname() use the default settings of RES_DEFNAMES
2298 (qualify_single) but not RES_DNSRCH (search_parents).
2300 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2301 spool_read_header() do less string testing, by means of a preliminary
2302 switch on the second character of optional "-foo" lines. (This is
2303 overdue, caused by the large number of possibilities that now exist.
2304 Originally there were few.) While I was there, I also converted the
2305 str(n)cmp tests so they don't re-test the leading "-" and the first
2306 character, in the hope this might squeeze out yet more improvement.
2308 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2309 flag allowing group syntax was set by the header_syntax check but not
2310 turned off, possible causing trouble later; (2) The flag was not being
2311 set at all for the header_verify test, causing "group"-style headers to
2312 be rejected. I have now set it in this case, and also caused header_
2313 verify to ignore an empty address taken from a group. While doing this, I
2314 came across some other cases where the code for allowing group syntax
2315 while scanning a header line wasn't quite right (mostly, not resetting
2316 the flag correctly in the right place). These bugs could have caused
2317 trouble for malformed header lines. I hope it is now all correct.
2319 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2320 with the "reply" argument non-NULL. The code, however (which originally
2321 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2322 but it didn't always do it. This confused somebody who was copying the
2323 code for some other use. I have removed all the tests.
2325 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2326 feature that was used to support insecure browsers during the U.S. crypto
2327 embargo. It requires special client support, and Exim is probably the
2328 only MTA that supported it -- and would never use it because real RSA is
2329 always available. This code has been removed, because it had the bad
2330 effect of slowing Exim down by computing (never used) parameters for the
2331 RSA_EXPORT functionality.
2333 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2334 authenticator to fail if there's a tab character in the incoming data
2335 (there should never be unless someone is messing about, as it's supposed
2336 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2337 if the connection is using TLS or if the remote IP is the same as the
2338 local IP, and the "valid-client-cert option" if a client certificate has
2341 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2342 authenticators. This can be used for authorization after authentication
2343 succeeds. (In the case of plaintext, it servers for both authentication
2346 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2347 if any retry times were supplied.
2349 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2350 connection, where there is no client IP address to check. In this
2351 situation, the verify now always succeeds.
2353 PH/25 Applied John Jetmore's -Mset patch.
2355 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2357 PH/27 In a string expansion for a processed (not raw) header when multiple
2358 headers of the same name were present, leading whitespace was being
2359 removed from all of them, but trailing whitespace was being removed only
2360 from the last one. Now trailing whitespace is removed from each header
2361 before concatenation. Completely empty headers in a concatenation (as
2362 before) are ignored.
2364 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2365 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2367 PH/29 [Removed. This was a change that I later backed out, and forgot to
2368 correct the ChangeLog entry (that I had efficiently created) before
2369 committing the later change.]
2371 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2372 address errors (4xx response to RCPT) over the same connection as other
2373 messages routed to the same hosts. Such deliveries are always "forced",
2374 so retry times are not inspected. This resulted in far too many retries
2375 for the affected addresses. The effect occurred only when there were more
2376 hosts than the hosts_max_try setting in the smtp transport when it had
2377 the 4xx errors. Those hosts that it had tried were not added to the list
2378 of hosts for which the message was waiting, so if all were tried, there
2379 was no problem. Two fixes have been applied:
2381 (i) If there are any address or message errors in an SMTP delivery, none
2382 of the hosts (tried or untried) are now added to the list of hosts
2383 for which the message is waiting, so the message should not be a
2384 candidate for sending over the same connection that was used for a
2385 successful delivery of some other message. This seems entirely
2386 reasonable: after all the message is NOT "waiting for some host".
2387 This is so "obvious" that I'm not sure why it wasn't done
2388 previously. Hope I haven't missed anything, but it can't do any
2389 harm, as the worst effect is to miss an optimization.
2391 (ii) If, despite (i), such a delivery is accidentally attempted, the
2392 routing retry time is respected, so at least it doesn't keep
2393 hammering the server.
2395 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2396 in ${readsocket because some servers need this prod.
2398 PH/32 Added some extra debug output when updating a wait-xxx database.
2400 PH/33 The hint "could be header name not terminated by colon", which has been
2401 given for certain expansion errors for a long time, was not being given
2402 for the ${if def:h_colon_omitted{... case.
2404 PH/34 The spec says: "With one important exception, whenever a domain list is
2405 being scanned, $domain contains the subject domain." There was at least
2406 one case where this was not true.
2408 PH/35 The error "getsockname() failed: connection reset by peer" was being
2409 written to the panic log as well as the main log, but it isn't really
2410 panic-worthy as it just means the connection died rather early on. I have
2411 removed the panic log writing for the ECONNRESET error when getsockname()
2414 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2415 runs only) independently of the message's sender address. This meant
2416 that, if the 4xx error was in fact related to the sender, a different
2417 message to the same recipient with a different sender could confuse
2418 things. In particualar, this can happen when sending to a greylisting
2419 server, but other circumstances could also provoke similar problems.
2420 I have changed the default so that the retry time for these errors is now
2421 based a combination of the sender and recipient addresses. This change
2422 can be overridden by setting address_retry_include_sender=false in the
2425 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2426 remote server are returned as part of bounce messages. This was not
2427 happening for LMTP over a pipe (the lmtp transport), but now it is the
2428 same for both kinds of LMTP.
2430 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2431 in header lines that were in fact CNAMEs. This is no longer the case.
2433 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2434 and queue runs started by the daemon processed all messages. This has
2435 been fixed so that -R and -S can now usefully be given with -q<time>.
2437 PH/40 Import PCRE release 6.7 (fixes some bugs).
2439 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2441 PH/42 Give an error if -q is specified more than once.
2443 PH/43 Renamed the variables $interface_address and $interface_port as
2444 $received_ip_address and $received_port, to make it clear that these
2445 values apply to message reception, and not to the outgoing interface when
2446 a message is delivered. (The old names remain recognized, of course.)
2448 PH/44 There was no timeout on the connect() call when using a Unix domain
2449 socket in the ${readsocket expansion. There now is.
2451 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2452 be meaningful with "accept".
2454 SC/01 Eximstats V1.43
2455 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2457 SC/02 Eximstats V1.44
2458 Use a glob alias rather than an array ref in the generated
2459 parser. This improves both readability and performance.
2461 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2462 Collect SpamAssassin and rejection statistics.
2463 Don't display local sender or destination tables unless
2464 there is data to show.
2465 Added average volumes into the top table text output.
2467 SC/04 Eximstats V1.46
2468 Collect data on the number of addresses (recipients)
2469 as well as the number of messages.
2471 SC/05 Eximstats V1.47
2472 Added 'Message too big' to the list of mail rejection
2473 reasons (thanks to Marco Gaiarin).
2475 SC/06 Eximstats V1.48
2476 Mainlog lines which have GMT offsets and are too short to
2477 have a flag are now skipped.
2479 SC/07 Eximstats V1.49 (Alain Williams)
2480 Added the -emptyok flag.
2482 SC/08 Eximstats V1.50
2483 Fixes for obtaining the IP address from reject messages.
2485 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2486 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2487 whitesspace changes from 4.64-PH/27
2489 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2492 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2493 are found, allow negative numbers in numeric criteria)
2495 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2497 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2498 to match changes made in 4.64-PH/43
2500 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2502 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2503 "domain" is actually an IP address, and force a failure. This locks out
2504 those revolvers/nameservers that support "A-for-A" lookups, in
2505 contravention of the specifications.
2507 PH/48 When a host name was looked up from an IP address, and the subsequent
2508 forward lookup of the name timed out, the host name was left in
2509 $sender_host_name, contrary to the specification.
2511 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2512 restricted to single-key lookups, Exim was not diagnosing an error if
2513 * or *@ was used with a query-style lookup.
2515 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2517 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2518 long ago, but noone interested enough thought of it. Let's just say that
2519 the "1.1" means that there are some new functions that weren't there at
2520 some point in the past.
2522 PH/51 Error processing for expansion failure of helo_data from an smtp
2523 transport during callout processing was broken.
2525 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2526 tested/used via the -bh/-bhc/-bs options.
2528 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2529 bug, fixed in subsequent PCRE releases).
2531 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2532 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2534 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2540 SC/01 Use a glob alias rather than an array ref in eximstats generated
2541 parser. This improves both readability and performance.
2543 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2544 Don't display local sender or destination tables in eximstats unless
2545 there is data to show.
2546 Added average volumes into the eximstats top table text output.
2548 SC/03 Collect data on the number of addresses (recipients) as well
2549 as the number of messages in eximstats.
2551 TF/01 Correct an error in the documentation for the redirect router. Exim
2552 does (usually) call initgroups() when daemonizing.
2554 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2555 with consistent privilege compared to when running as a daemon.
2557 TF/03 Note in the spec that $authenticated_id is not set for local
2558 submissions from trusted users.
2560 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2561 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2563 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2564 by adding some example configuration directives to the default
2565 configuration file. A little bit of work is required to uncomment the
2566 directives and define how usernames and passwords are checked, but
2567 there is now a framework to start from.
2569 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2570 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2571 without this. I don't know how relevant this is to other LDAP libraries.
2573 PH/02 Add the verb name to the "unknown ACL verb" error.
2575 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2577 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2579 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2580 directory not expanded when it should be if an expanded home directory
2581 was set for the address (which is overridden by the transport).
2583 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2586 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2587 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2588 because it is too late at that time, and has no effect.
2590 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2591 security issue with \' (bugzilla #107). I could not use the
2592 PQescapeStringConn() function, because it needs a PGconn value as one of
2595 PH/08 When testing addresses using -bt, indicate those final addresses that
2596 are duplicates that would not cause an additional delivery. At least one
2597 person was confused, thinking that -bt output corresponded to deliveries.
2598 (Suppressing duplicates isn't a good idea as you lose the information
2599 about possibly different redirections that led to the duplicates.)
2601 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2602 systems where poll() doesn't work, in particular OS X.
2604 PH/10 Added more information to debugging output for retry time not reached.
2606 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2607 operations in malware.c.
2609 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2612 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2613 syslog_duplication set false, log lines that would normally be written
2614 both the the main log and to the reject log were not written to syslog at
2617 PH/14 In the default configuration, change the use of "message" in ACL warn
2618 statements to "add_header".
2620 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2621 not followed by a command (e.g. "seen endif").
2623 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2624 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2627 PH/17 Added extra conditions to the default value of delay_warning_condition
2631 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2632 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2633 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2636 The Auto-Submitted: and various List- headers are standardised, whereas I
2637 don't think Precedence: ever was.
2639 PH/18 Refactored debugging code in route_finduser() to show more information,
2640 in particular, the error code if getpwnam() issues one.
2642 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2643 This is apparently needed in addition to the PH/07 change above to avoid
2644 any possible encoding problems.
2646 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2647 but not after initializing Perl.
2649 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2650 output them only if debugging. By default they are written stderr,
2651 apparently, which is not desirable.
2653 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2656 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2659 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2661 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2662 authenticated or an ident call has been made. Suppress the default
2663 values for $authenticated_id and $authenticated_sender (but permit -oMai
2664 and -oMas) when testing with -bh.
2666 PH/24 Re-jigged the order of the tests in the default configuration so that the
2667 tests for valid domains and recipients precede the DNS black list and CSA
2668 tests, on the grounds that those ones are more expensive.
2670 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2671 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2672 This bug exists in every version of Exim that I still have, right back to
2675 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2676 However, an attempt to turn on case-sensitivity in a regex key by
2677 including (?-i) didn't work because the subject string was already
2678 lowercased, and the effects were non-intuitive. It turns out that a
2679 one-line patch can be used to allow (?-i) to work as expected.
2685 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2686 other effects) broke the use of negated acl sub-conditions.
2688 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2691 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2692 "Deny" causes Exim to reject the incoming connection with a 554 error.
2693 Unfortunately, if there is a major crisis, such as a disk failure,
2694 tcp-wrappers gives "deny", whereas what one would like would be some
2695 kind of temporary error. A kludge has been added to help with this.
2696 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2697 554 error is used if errno is still zero or contains ENOENT (which occurs
2698 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2701 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2703 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2704 errors. Otherwise a message that provokes a temporary error (when other
2705 messages do not) can cause a whole host to time out.
2707 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2708 addresses were routed directly to files or pipes from a redirect router.
2709 File deliveries just didn't batch; pipe deliveries might have suffered
2712 PH/06 A failure to get a lock for a hints database would erroneously always say
2713 "Failed to get write lock", even when it was really a read lock.
2715 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2716 of 0600. This has been changed to use the value of the lockfile_mode
2717 option (which defaults to 0600).
2719 PH/08 Applied small patch from the Sieve maintainer.
2721 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2722 folder from quota calculations, a direct delivery into this folder messed
2723 up the contents of the maildirsize file. This was because the regex was
2724 used only to exclude .Trash (or whatever) when the size of the mailbox
2725 was calculated. There was no check that a delivery was happening into an
2726 excluded directory. This bug has been fixed by ignoring all quota
2727 processing for deliveries into excluded directories.
2729 PH/10 Added the maildirfolder_create_regex option to appendfile.
2735 PH/01 The code for finding all the local interface addresses on a FreeBSD
2736 system running IPv6 was broken. This may well have applied to all BSD
2737 systems, as well as to others that have similar system calls. The broken
2738 code found IPv4 interfaces correctly, but gave incorrect values for the
2739 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2740 that it would not match correctly against @[] and not recognize the IPv6
2743 PH/02 The ipliteral router was not recognizing addresses of the form user@
2744 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2746 PH/03 Added disable_ipv6.
2748 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2749 decoded form, because it is most often used to construct To: headers
2750 lines in autoreplies, and the decoded form may well be syntactically
2751 invalid. However, $reply_address has leading white space removed, and all
2752 newlines turned into spaces so that the autoreply transport does not
2755 PH/05 If group was specified without a user on a router, and no group or user
2756 was specified on a transport, the group from the router was ignored.
2758 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2759 for visible compile-time settings that can be used to change these
2760 numbers, for those that want even more. Backwards compatibility with old
2761 spool files has been maintained. However, going back to a previous Exim
2762 release will lost any variables that are in spool files.
2764 PH/07 Two small changes when running in the test harness: increase delay when
2765 passing a TCP/IP connection to a new process, in case the original
2766 process has to generate a bounce, and remove special handling of
2767 127.0.0.2 (sic), which is no longer necessary.
2769 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2770 be the same on different OS.
2772 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2775 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2776 whether --show-vars was specified or not
2778 JJ/02 exipick: Added support for new ACL variable spool format introduced
2781 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2782 syntactically invalid From: or Reply-to: line, and a filter used this to
2783 generate an autoreply, and therefore failed to obtain an address for the
2784 autoreply, Exim could try to deliver to a non-existent relative file
2785 name, causing unrelated and misleading errors. What now happens is that
2786 it logs this as a hard delivery error, but does not attempt to create a
2789 PH/11 The exinext utility has a -C option for testing purposes, but although
2790 the given file was scanned by exinext itself; it wasn't being passed on
2791 when Exim was called.
2793 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2794 an end-of-file indication when reading a command response.
2796 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2797 compiled. In many other places in Exim, IPv6 addresses are always
2798 recognized, so I have changed this. It also means that IPv4 domain
2799 literals of the form [IPV4:n.n.n.n] are now always recognized.
2801 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2802 used if the router is not running as root, for example, when verifying at
2803 ACL time, or when using -bh. The debugging output from this situation was
2804 non-existent - all you got was a failure to exec. I have made two
2807 (a) Failures to set uid/gid, the current directory, or a process leader
2808 in a subprocess such as that created by queryprogram now generate
2809 suitable debugging ouput when -d is set.
2811 (b) The queryprogram router detects when it is not running as root,
2812 outputs suitable debugging information if -d is set, and then runs
2813 the subprocess without attempting to change uid/gid.
2815 PH/15 Minor change to Makefile for building test_host (undocumented testing
2818 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2819 additional section of a DNS packet that returns MX or SRV records.
2820 Instead, it always explicitly searches for A/AAAA records. This avoids
2821 major problems that occur when a DNS server includes only records of one
2822 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2823 fixed another bug: if SRV records were looked up and the corresponding
2824 address records were *not* found in the additional section, the port
2825 values from the SRV records were lost.
2827 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2828 using the correct key (the original address) when searching the retry
2829 rules in order to find which one to use for generating the retry hint.
2831 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2832 adding the default one. Similarly, if it contains a Reply-To: header, the
2833 errors_reply_to option, if set, is not used.
2835 PH/19 When calculating a retry time, Exim used to measure the "time since
2836 failure" by looking at the "first failed" field in the retry record. Now
2837 it does not use this if it is later than than the arrival time of the
2838 message. Instead it uses the arrival time. This makes for better
2839 behaviour in cases where some deliveries succeed, thus re-setting the
2840 "first failed" field. An example is a quota failure for a huge message
2841 when small messages continue to be delivered. Without this change, the
2842 "time since failure" will always be short, possible causing more frequent
2843 delivery attempts for the huge message than are intended.
2844 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2846 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2847 $1, $2, $3) because the numerical variables can be reset during some
2848 expansion items (e.g. "match"), thereby losing the authentication data.
2850 PH/21 Make -bV show the size of off_t variables so that the test suite can
2851 decide whether to run tests for quotas > 2G.
2853 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2854 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2855 filecount value is greater than 2G or if a quota value is greater than 2G
2856 on a system where the size of off_t is not greater than 4, a panic error
2859 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2860 never match. The debug and -bh output now contains an explicit error
2861 message indicating a malformed IPv4 address or mask.
2863 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2864 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2865 PH/23 above applies.
2867 PH/25 Do not write to syslog when running in the test harness. The only
2868 occasion when this arises is a failure to open the main or panic logs
2869 (for which there is an explicit test).
2871 PH/26 Added the /no_tell option to "control=freeze".
2873 PH/27 If a host name lookup failed very early in a connection, for example, if
2874 the IP address matched host_lookup and the reverse lookup yielded a name
2875 that did not have a forward lookup, an error message of the form "no IP
2876 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2877 could be logged. Now it outputs the IP address instead of "NULL".
2879 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2880 allows the sender and the authenticated sender to be set when
2881 submitting a message from within Exim. Since child_open_exim() is
2882 documented for local_scan(), the new function should be too.
2884 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2885 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2886 results in an empty string is now treated as unset.
2888 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2890 PH/31 Added sender_verify_fail logging option.
2892 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2893 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2894 tidied the source and removed it altogether.
2896 PH/33 When a queue run was abandoned because the load average was too high, a
2897 log line was always written; now it is written only if the queue_run log
2898 selector is set. In addition, the log line for abandonment now contains
2899 information about the queue run such as the pid. This is always present
2900 in "start" and "stop" lines but was omitted from the "abandon" line.
2902 PH/34 Omit spaces between a header name and the colon in the error message that
2903 is given when verify = headers_syntax fails (if there are lots of them,
2904 the message gets confusing).
2906 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2907 names, as there are now some PTR records that contain slashes. This check
2908 is only to protect against broken name servers that fall over on strange
2909 characters, so the fact that it applies to all lookups doesn't matter.
2911 PH/36 Now that the new test suite is complete, we can remove some of the
2912 special code in Exim that was needed for the old test suite. For example,
2913 sorting DNS records because real resolvers return them in an arbitrary
2914 order. The new test suite's fake resolver always returns records in the
2917 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2918 bounces) except when queue_only is set, to avoid logging races between
2919 the different processes.
2921 PH/38 Panic-die if .include specifies a non-absolute path.
2923 PH/39 A tweak to the "H" retry rule from its user.
2925 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2926 a label. They prevented compilation on older perls.
2928 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2929 a warning to be raised on newish perls.
2931 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2932 on queue. Changes to match documented behaviour of showing count of
2933 messages matching specified criteria.
2935 PH/40 Changed the default ident timeout from 30s to 5s.
2937 PH/41 Added support for the use of login_cap features, on those BSD systems
2938 that have them, for controlling the resources used by pipe deliveries.
2940 PH/42 The content-scanning code uses fopen() to create files in which to put
2941 message data. Previously it was not paying any attention to the mode of
2942 the files. Exim runs with umask(0) because the rest of the code creates
2943 files with open(), and sets the required mode explicitly. Thus, these
2944 files were ending up world-writeable. This was not a big issue, because,
2945 being within the spool directory, they were not world-accessible. I have
2946 created a function called modefopen, which takes an additional mode
2947 argument. It sets umask(777), creates the file, chmods it to the required
2948 mode, then resets the umask. All the relevant calls to fopen() in the
2949 content scanning code have been changed to use this function.
2951 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2952 to 24 hours. This avoids potential overflow problems when processing G
2953 and H retry rules. I suspect nobody ever tinkers with this value.
2955 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2957 PH/45 When the plaintext authenticator is running as a client, the server's
2958 challenges are checked to ensure they are valid base64 strings. By
2959 default, the authentication attempt is cancelled if an invalid string is
2960 received. Setting client_ignore_invalid_base64 true ignores these errors.
2961 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2962 they are received. Thus, the responses can be made to depend on the
2963 challenges. If an invalid string is ignored, an empty string is placed in
2966 PH/46 Messages that are created by the autoreply transport now contains a
2967 References: header, in accordance with RFCs 2822 and 3834.
2969 PH/47 Added authenticated_sender_force to the smtp transport.
2971 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2973 PH/49 Installed latest patch from the Sieve maintainer.
2975 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2976 was also set, the appendfile transport was unnecessarily scanning a
2977 directory of message files (e.g. for maildir delivery) to find the count
2978 of files (along with the size), even though it did not need this
2979 information. It now does the scan only if it needs to find either the
2980 size of the count of files.
2982 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2984 PH/52 Two bugs concerned with error handling when the smtp transport is
2987 (i) Exim was not creating retry information for temporary errors given
2988 for individual recipients after the DATA command when the smtp transport
2989 was used in LMTP mode. This meant that they could be retried too
2990 frequently, and not timed out correctly.
2992 (ii) Exim was setting the flag that allows error details to be returned
2993 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2994 recipients that were returned after the DATA command.
2996 PH/53 This is related to PH/52, but is more general: for any failing address,
2997 when detailed error information was permitted to be returned to the
2998 sender, but the error was temporary, then after the final timeout, only
2999 "retry timeout exceeded" was returned. Now it returns the full error as
3000 well as "retry timeout exceeded".
3002 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3003 do this, and (what is worse) MTAs that accept it.
3005 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3006 will now be deprecated.
3008 PH/56 New os.c-cygwin from the Cygwin maintainer.
3010 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3011 formats (previously only available in exim formats via -bpr, -bpru,
3012 and -bpra. Now also available in native and exiqgrep formats)
3014 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3015 with very large, slow to parse queues
3017 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3019 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3021 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3022 responses to authentication challenges, though it was showing the
3023 challenges; (ii) I've removed the CR characters from the debug output for
3026 PH/58 Allow for the insertion of a newline as well as a space when a string
3027 is turned into more than one encoded-word during RFC 2047 encoding. The
3028 Sieve code now uses this.
3030 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3031 data_4xx, lost_connection, tls_required.
3033 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3034 message was being sent as an SMTP response.
3036 PH/61 Add -l and -k options to exicyclog.
3038 PH/62 When verifying, if an address was redirected to one new address, so that
3039 verification continued, and the new address failed or deferred after
3040 having set something in $address_data, the value of $address_data was not
3041 passed back to the ACL. This was different to the case when no
3042 redirection occurred. The value is now passed back in both cases.
3044 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3045 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3046 use login_cap.h, so on its own it isn't the distinguishing feature. The
3047 new name refers directly to the setclassresources() function.
3049 PH/65 Added configuration files for NetBSD3.
3051 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3053 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3054 is preferred over IPv4.
3056 PH/68 The bounce_return_message and bounce_return_body options were not being
3057 honoured for bounces generated during the reception of non-SMTP messages.
3058 In particular, this applied to messages rejected by the ACL. This bug has
3059 been fixed. However, if bounce_return_message is true and bounce_return_
3060 body is false, the headers that are returned for a non-SMTP message
3061 include only those that have been read before the error was detected.
3062 (In the case of an ACL rejection, they have all been read.)
3064 PH/69 The HTML version of the specification is now built in a directory called
3065 spec_html instead of spec.html, because the latter looks like a path with
3066 a MIME-type, and this confuses some software.
3068 PH/70 Catch two compiler warnings in sieve.c.
3070 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3071 function verify_get_ident() calls ip_connect() to connect a socket, but
3072 if the "connect()" function timed out, ip_connect() used to close the
3073 socket. However, verify_get_ident() also closes the socket later, and in
3074 between Exim writes to the log, which may get opened at this point. When
3075 the socket was closed in ip_connect(), the log could get the same file
3076 descriptor number as the socket. This naturally causes chaos. The fix is
3077 not to close the socket in ip_connect(); the socket should be closed by
3078 the function that creates it. There was only one place in the code where
3079 this was missing, in the iplookup router, which I don't think anybody now
3080 uses, but I've fixed it anyway.
3082 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3083 well as to direct DNS lookups. Otherwise the handling of names in host
3084 lists is inconsistent and therefore confusing.
3090 PH/01 Two changes to the default runtime configuration:
3092 (1) Move the checks for relay_from_hosts and authenticated clients from
3093 after to before the (commented out) DNS black list checks.
3095 (2) Add control=submission to the relay_from_hosts and authenticated
3096 clients checks, on the grounds that messages accepted by these
3097 statements are most likely to be submissions.
3099 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3101 (1) Generate an error if the third argument for the ${prvs expansion is
3104 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3107 (3) Reset the variables that are obtained from the first argument of
3108 ${prvscheck and used in the second argument before leaving the code,
3109 because their memory is reclaimed, so using them afterwards may do
3112 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3113 one (it's much easier than Tom thought :-).
3115 (5) Because of (4), we can now allow for the use of $prvscheck_result
3116 inside the third argument.
3118 PH/03 For some reason, the default setting of PATH when running a command from
3119 a pipe transport was just "/usr/bin". I have changed it to
3122 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3123 anything to be listed in the output from -bV.
3125 PH/05 When a filter generated an autoreply, the entire To: header line was
3126 quoted in the delivery log line, like this:
3128 => >A.N.Other <ano@some.domain> <original@ddress> ...
3130 This has been changed so that it extracts the operative address. There
3131 may be more than one such address. If so, they are comma-separated, like
3134 => >ano@some.domain,ona@other.domain <original@ddress> ...
3136 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3137 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3138 not being looked up in the rDNS to get a host name, Exim was showing the
3139 IP address twice in Received: lines, even though the IP addresses were
3140 identical. For example:
3142 Received: from [1.2.3.4] (helo=[1.2.3.4])
3144 However, if the real host name was known, it was omitting the HELO data
3145 if it matched the actual IP address. This has been tidied up so that it
3146 doesn't show the same IP address twice.
3148 PH/07 When both +timestamp and +memory debugging was on, the value given by
3149 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3150 called by the debug printing, thereby overwriting the timestamp buffer.
3151 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3153 PH/08 When the original message was included in an autoreply transport, it
3154 always said "this is a copy of the message, including all the headers",
3155 even if body_only or headers_only was set. It now gives an appropriate
3158 PH/09 Applied a patch from the Sieve maintainer which:
3160 o fixes some comments
3161 o adds the (disabled) notify extension core
3162 o adds some debug output for the result of if/elsif tests
3163 o points to the current vacation draft in the documentation
3164 and documents the missing references header update
3168 o fixes a bug in processing the envelope test (when testing
3169 multiple envelope elements, the last element determinted the
3172 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3173 Electronic Mail") by including:
3175 Auto-submitted: auto-generated
3177 in the messages that it generates (bounce messages and others, such as
3178 warnings). In the case of bounce messages for non-SMTP mesages, there was
3179 also a typo: it was using "Auto_submitted" (underscore instead of
3180 hyphen). Since every message generated by Exim is necessarily in response
3181 to another message, thes have all been changed to:
3183 Auto-Submitted: auto-replied
3185 in accordance with these statements in the RFC:
3187 The auto-replied keyword:
3189 - SHOULD be used on messages sent in direct response to another
3190 message by an automatic process,
3192 - MUST NOT be used on manually-generated messages,
3194 - MAY be used on Delivery Status Notifications (DSNs) and Message
3195 Disposition Notifications (MDNs),
3197 - MUST NOT be used on messages generated by automatic or periodic
3198 processes, except for messages which are automatic responses to
3201 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3202 to the default Received: header definition.
3204 PH/12 Added log selector acl_warn_skipped (default on).
3206 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3207 variables because (a) they are in the wrong storage pool and (b) even if
3208 they were copied, it wouldn't work properly because of the caching.
3210 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3211 checking when decoding. Apparently there are clients that generate
3212 overlong encoded strings. Why am I not surprised?
3214 PH/15 If the first argument of "${if match_address" was not empty, but did not
3215 contain an "@" character, Exim crashed. Now it writes a panic log message
3216 and treats the condition as false.
3218 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3220 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3221 extension "envelope-auth". The code is finished and in agreement with
3222 other implementations, but there is no documentation so far and in fact,
3223 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3224 not changing the active code.
3226 Print executed "if" and "elsif" statements when debugging is used. This
3227 helps a great deal to understand what a filter does.
3229 Document more things not specified clearly in RFC3028. I had all this
3230 sorted out, when out of a sudden new issues came to my mind. Oops."
3232 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3235 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3236 canonical form (as documented). However, after a host name lookup from
3237 the IP address, check_host() was doing a simple string comparison with
3238 addresses acquired from the DNS when checking that the found name did
3239 have the original IP as one of its addresses. Since any found IPv6
3240 addresses are likely to be in abbreviated form, the comparison could
3241 fail. Luckily, there already exists a function for doing the comparison
3242 by converting both addresses to binary, so now that is used instead of
3243 the text comparison.
3245 PH/20 There was another similar case to PH/19, when a complete host name was
3246 given in a host list; looking up its IP address could give an abbreviated
3247 form, whereas the current host's name might or might not be abbreviated.
3248 The same fix has been applied.
3254 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3255 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3258 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3259 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3261 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3263 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3264 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3265 Also, for "Auto-Submitted", treat anything other than "no" as
3266 non-personal, in accordance with RFC 3834. (Previously it treated
3267 anything starting "auto-" as non-personal.)
3269 TF/01 The control=submission/name=... option had a problem with syntax
3270 errors if the name included a slash character. The /name= option
3271 now slurps the rest of the string, so it can include any characters
3272 but it must come last in the list of options (after /sender_retain
3275 PH/05 Some modifications to the interface to the fake nameserver for the new
3283 TK/01 Added the "success_on_redirect" address verification option. See
3284 NewStuff for rationale and an example.
3286 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3288 PH/02 Patch to exigrep to allow it to work on syslog lines.
3290 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3291 fread() to skip over the body file's header line, because in Cygwin the
3292 header line is locked and is inaccessible.
3294 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3295 co-exist for some time) to make it clear that it is the Exim ID that is
3296 referenced, not the Message-ID: header line.
3298 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3299 string_format() function, because snprintf() does not exist on all
3302 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3303 ${stat: expansion item.
3305 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3306 protocol synchronization error", to keep the pedants happy.
3308 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3309 well as for IRIX systems, when gcc is being used. See the host.c source
3312 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3314 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3317 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3318 transport and to the smtp transport in LMTP mode.
3320 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3322 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3323 run a filter in a subprocess. This could lead to confusion in subsequent
3324 lookups in the parent process. There should also be a search_tidyup() at
3325 the end of the subprocess.
3327 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3328 only if the host matched helo_try_verify_hosts, which caused the
3329 verification to occur when the EHLO/HELO command was issued. The ACL just
3330 tested the remembered result. Now, if a previous verification attempt has
3331 not happened, "verify = helo" does it there and then.
3333 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3335 TK/03 Fix log output including CR from clamd.
3337 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3338 exist provoked a memory error which could cause a segfault.
3340 PH/15 Installed PCRE 6.2
3342 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3344 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3345 of the problem. Specifically, suggested +O2 rather than +O1 for the
3348 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3350 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3351 record, the port was not correctly logged when the outgoing_port log
3352 selector was set (it logged the transort's default port).
3354 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3355 fallback_hosts, and "hosts" in the smtp transport.
3357 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3358 host errors such as "Connection refused".
3360 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3361 authentication with radiusclient 0.4.9:
3363 - Error returned from rc_read_config was caught wrongly
3364 - Username/password not passed on to radius server due to wrong length.
3366 The presumption is that some radiusclient API changes for 4.51/PH/17
3367 were not taken care of correctly. The code is still untested by me (my
3368 Linux distribution still has 0.3.2 of radiusclient), but it was
3369 contributed by a Radius user.
3371 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3372 expanding the "port" option of the smtp transport.
3374 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3375 while reading a MIME header. Thanks to Tom Hughes for a patch.
3377 PH/24 Include config.h inside local_scan.h so that configuration settings are
3380 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3381 that in an ACL for RCPT (for example), you can examine exactly what was
3384 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3385 commands, but it was not correctly comparing the address with the actual
3386 client host address. Thus, it would show the EHLO address in Received:
3387 header lines when this was not necessary.
3389 PH/27 Added the % operator to ${eval:}.
3391 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3392 it should be ignoring failures (because with -C, for example, it has lost
3393 privilege). It wasn't ignoring creation failures other than "already
3396 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3399 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3400 because an input line was too long, either on its own, or by virtue of
3401 too many continuations, the temporary file was not being removed, and the
3402 return code was incorrect.
3404 PH/31 Missing "BOOL" in function definition in filtertest.c.
3406 PH/32 Applied Sieve patches from the maintainer.
3408 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3410 PH/33 Added "verify = not_blind".
3412 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3413 Local/Makefile (with some defaults set). These are used in built scripts
3414 such as exicyclog, but they have never been used in the exim_install
3415 script (though there are many overriding facilities there). I have
3416 arranged that the exim_install script now takes note of these two
3419 PH/35 Installed configuration files for Dragonfly.
3421 PH/36 When a locally submitted message by a trusted user did not contain a
3422 From: header, and the sender address was obtained from -f or from an SMTP
3423 MAIL command, and the trusted user did not use -F to supply a sender
3424 name, $originator_name was incorrectly used when constructing a From:
3425 header. Furthermore, $originator_name was used for submission mode
3426 messages from external hosts without From: headers in a similar way,
3427 which is clearly wrong.
3429 PH/37 Added control=suppress_local_fixups.
3431 PH/38 When log_selector = +received_sender was set, and the addition of the
3432 sender made the log line's construction buffer exactly full, or one byte
3433 less than full, an overflow happened when the terminating "\n" was
3436 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3437 when the result of a list match is failure because a DNS lookup failed.
3439 PH/40 RM_COMMAND is now used in the building process.
3441 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3442 the "build-* directories that it finds.
3444 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3445 address in a domain literal was a prefix of an interface address.
3447 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3448 when verifying a sender address, unless rewrite_headers is false.
3450 PH/44 Wrote a long comment about why errors_to addresses are verified as
3451 recipients, not senders.
3453 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3454 the ratelimit ACL was added.
3456 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3458 PH/46 Added extra information about PostgreSQL errors to the error string.
3460 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3461 avoiding the need to install special zones in a real server. This is
3462 backwards compatible; if it can't find the fake resolver, it drops back.
3463 Thus, both old and new test suites can be run.
3465 TF/02 Added util/ratelimit.pl
3467 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3468 clock is set back in time.
3470 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3471 Candler <B.Candler@pobox.com>.
3473 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3474 OK for addresses that are the result of redirections.
3476 PH/48 A number of further additions for the benefit of the new test suite,
3477 including a fake gethostbyname() that interfaces to the fake DNS resolver
3480 TF/06 The fix for widen_domains has also been applied to qualify_single and
3481 search_parents which are the other dnslookup options that can cause
3484 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3487 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3489 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3490 service" if it encountered an MX record with an empty target hostname.
3491 The message is now "an MX or SRV record indicated no SMTP service".
3493 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3494 if the DNS of the sending site is misconfigured. This is quite a
3495 common situation. This change restores the behaviour of treating a
3496 helo verification defer as a failure.
3498 PH/51 If self=fail was set on a router, the bounce message did not include the
3499 actual error message.
3505 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3507 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3508 command itself ended in error, the underlying message about the transport
3509 filter timeout was being overwritten with the pipe command error. Now the
3510 underlying error message should be appended to the second error message.
3512 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3514 PH/02 Reduce the amount of output that "make" produces by default. Full output
3515 can still be requested.
3517 PH/03 The warning log line about a condition test deferring for a "warn" verb
3518 was being output only once per connection, rather than after each
3519 occurrence (because it was using the same function as for successful
3520 "warn" verbs). This seems wrong, so I have changed it.
3522 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3523 it should not have, which might have caused a crash in the right
3524 circumstances, but probably never did.
3526 PH/04 Installed a modified version of Tony Finch's patch to make submission
3527 mode fix the return path as well as the Sender: header line, and to
3528 add a /name= option so that you can make the user's friendly name appear
3531 TF/03 Added the control = fakedefer ACL modifier.
3533 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3534 Mark Lowes for thorough testing.
3536 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3538 TK/03 Merged latest SRS patch from Miles Wilton.
3540 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3541 with the definition in sysexits.h (which is #included earlier).
3542 Fortunately, Exim does not actually use EX_OK. The code used to try to
3543 preserve the sysexits.h value, by assumimg that macro definitions were
3544 scanned for macro replacements. I have been disabused of this notion,
3545 so now the code just undefines EX_OK before #including unistd.h.
3547 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3548 in the smtp transport. When a block could not be written in a single
3549 write() function, the timeout was being re-applied to each part-write.
3550 This seems wrong - if the receiver was accepting one byte at a time it
3551 would take for ever. The timeout is now adjusted when this happens. It
3552 doesn't have to be particularly precise.
3554 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3555 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3557 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3558 without a domain if the check to <postmaster@domain> fails.
3560 SC/01 Eximstats: added -xls and the ability to specify output files
3561 (patch written by Frank Heydlauf).
3563 SC/02 Eximstats: use FileHandles for outputing results.
3565 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3567 SC/04 Eximstats: fixed display of large numbers with -nvr option
3569 SC/05 Eximstats: fixed merging of reports with empty tables.
3571 SC/06 Eximstats: added the -include_original_destination flag
3573 SC/07 Eximstats: removed tabs and trailing whitespace.
3575 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3577 TK/06 MBOX spool code: Add real "From " MBOX separator line
3578 so the .eml file is really in mbox format (even though
3579 most programs do not really care). Patch from Alex Miller.
3581 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3582 The latter is generated from $received_to and is only set if the
3583 message has one envelope recipient. SA can use these headers,
3584 obviously out-of-the-box. Patch from Alex Miller.
3586 PH/08 The ${def test on a variable was returning false if the variable's
3587 value was "0", contrary to what the specification has always said!
3588 The result should be true unless the variable is empty.
3590 PH/09 The syntax error of a character other than { following "${if
3591 def:variable_name" (after optional whitespace) was not being diagnosed.
3592 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3593 accidental colon was present, for example, could give incorrect results.
3595 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3596 result is used (not including appendfile, where other changes are about
3599 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3600 This involved changing a lot of size variables from int to off_t. It
3601 should work with maildirs and everything.
3603 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3604 spamd dying while we are connected to it.
3606 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3609 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3610 function for BDB 4.3.
3612 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3614 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3615 the sources for PCRE have been re-arranged and more files are now
3618 PH/15 The code I had for printing potentially long long variables in PH/11
3619 above was not the best (it lost precision). The length of off_t variables
3620 is now inspected at build time, and an appropriate printing format (%ld
3621 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3622 to be "long long int" or "long int". This is needed for the internal
3623 formatting function string_vformat().
3625 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3626 the configuration file to be ":syslog", then the script "guesses" where
3627 the logs files are, rather than using the compiled in default. In our
3628 case the guess is not the same as the compiled default, so the script
3629 suddenly stopped working when I started to use syslog. The patch checks
3630 to see if log_file_path is "". If so, it attempts to read it from exim
3631 with no configuration file to get the compiled in version, before it
3632 falls back to the previous guessing code."
3634 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3635 implementing BATV in an Exim configuration. See NewStuff for the gory
3638 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3639 Makefile that are specific to HP-UX.
3641 PH/18 If the "use_postmaster" option was set for a recipient callout together
3642 with the "random" option, the postmaster address was used as the MAIL
3643 FROM address for the random test, but not for the subsequent recipient
3644 test. It is now used for both.
3646 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3647 patch removes a few documentation additions to RFC 3028, because the
3648 latest draft now contains them. It adds the new en;ascii-case comparator
3649 and a new error check for 8bit text in MIME parts. Comparator and
3650 require names are now matched exactly. I enabled the subaddress
3651 extension, but it is not well tested yet (read: it works for me)."
3653 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3654 rework some of the code of TK/09 above to avoid the hardwired use of
3655 "%lld" and "long long". Replaced the call to snprintf() with a call to
3658 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3659 records point to non-existent hosts", "retry timeout exceeded", and
3660 "retry time not reached for any host after a long failure period".
3662 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3663 experimental DomainKeys support:
3665 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3666 (2) On an error such as an illegally used "control", the wrong name for
3667 the control was given.
3669 These problems did NOT occur unless DomainKeys support was compiled.
3671 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3673 PH/24 Added ${if match_ip condition.
3675 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3676 databases so that it will be absolutely obvious if a crash occurs in the
3677 DB library. This is a regular occurrence (often caused by mis-matched
3680 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3681 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3682 picked up on a user's system that detects such things. There doesn't seem
3683 to be a gcc warning option for this - only an attribute that has to be
3684 put on the function's prototype. It seems that in Fedora Core 4 they have
3685 set this on a number of new functions. No doubt there will be more in due
3688 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3689 specify a transport. However, if an address that was verified by such a
3690 router was the subject of a callout, Exim crashed because it tried to
3691 read the rcpt_include_affixes from the non-existent transport. Now it
3692 just assumes that the setting of that option is false. This bug was
3693 introduced by 4.51/PH/31.
3695 PH/28 Changed -d+all to exclude +memory, because that information is very
3696 rarely of interest, but it makes the output a lot bigger. People tend to
3697 do -d+all out of habit.
3699 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3700 code in os-type was giving problems when libc.so lives in lib64, like on
3703 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3704 aren't the modern standard, and it seems that some systems' include files
3705 don't always have them. Exim was already checking for some of the newer
3706 ones like T_AAAA, and defining it itself. I've added checks for all the
3707 record types that Exim uses.
3709 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3710 not automatically generating a new one, as it is supposed to. This
3711 prevented TLS from working. If the file did exist, but contained invalid
3712 data, a new version was generated, as expected. It was only the case of a
3713 non-existent file that was broken.
3715 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3716 with a change in libdomainkeys > 0.64.
3718 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3719 from DNS. If the selector record carries the flag, it now has
3720 precedence over the domain-wide flag.
3722 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3724 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3725 the use of a port name that isn't defined in /etc/services) occurred, the
3726 message was deferred as in a normal delivery, and thus remained on the
3727 spool, instead of being failed because of the mua_wrapper setting. This
3728 is now fixed, and I tidied up some of the mua_wrapper messages at the
3731 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3732 the messages in a hash of arrays rather than using individual hashes.
3733 This is a bit cleaner and results in dramatic memory savings, albeit
3734 at a slight CPU cost.
3736 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3737 as requested by Marc Sherman.
3739 SC/10 Eximstats: added histograms for user specified patterns as requested
3742 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3744 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3745 fopen() in the content-scanning modules that did not already have it.
3751 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3752 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3754 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3756 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3758 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3759 to test Sieve filters that use "vacation".
3761 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3762 that changes the way the GnuTLS parameters are stored in the cache file.
3763 The new format can be generated externally. For backward compatibility,
3764 if the data in the cache doesn't make sense, Exim assumes it has read an
3765 old-format file, and it generates new data and writes a new file. This
3766 means that you can't go back to an older release without removing the
3769 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3770 work if there are any delivery delays because "one_time" forces the
3771 parent to be marked "delivered", so its unseen clone is never tried
3772 again. For this reason, Exim now forbids the simultaneous setting of
3775 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3776 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3777 entry if you want to know the details. The fix, however, neglected to
3778 consider the case when local delivery batching is involved. The test for
3779 "previously delivered" was not happening when checking to see if an
3780 address could be batched with a previous (undelivered) one; under
3781 certain circumstances this could lead to multiple deliveries to the same
3784 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3785 in its include files, and this causes problems building Exim.
3787 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3788 header_syntax) but Exim was just ignoring anything given after a slash.
3789 In particular, this caused confusion with an attempt to use "verify =
3790 reverse_host_lookup/defer_ok". An error is now given when options are
3791 supplied for verify items that do not have them. (Maybe reverse_host_
3792 lookup should have a defer_ok option, but that's a different point.)
3794 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3795 defined by RFC 821) to 2048, because there were problems with some AUTH
3796 commands, and RFC 1869 says the size should be increased for extended
3797 SMTP commands that take arguments.
3799 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3802 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3803 "unknown" error; now it says that the functionality isn't in the binary.
3805 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3806 an address' error message when a string expansion fails (syntax or
3807 whatever). Otherwise the password may appear in the log. Following change
3808 PH/42 below, there is no longer a chance of it appearing in a bounce
3811 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3813 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3814 of its addresses was ever tried. (Bugzilla bug #2.)
3816 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3817 the result incorrectly in the debug output. (It correctly added a newline
3818 to what was transported.)
3820 TF/01 Added $received_time.
3822 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3823 commented out examples of how to interface to a virus scanner and to
3824 SpamAssassin. Also added commented examples of av_scanner and
3825 spamd_address settings.
3827 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3828 and controls are allowed in which ACLs. There were a couple of minor
3829 errors. Some of the entries in the conditions table (which is a table of
3830 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3831 negation of where the condition IS allowed.
3833 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3835 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3836 header file does not have a version number, so I've had to invent a new
3837 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3838 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3839 radiusclient), but it was contributed by a Radius user.
3841 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3842 files or directories, for OpenSSL.
3844 PH/19 When an Exim process that is running as root has to create an Exim log
3845 file, it does so in a subprocess that runs as exim:exim so as to get the
3846 ownership right at creation (otherwise, other Exim processes might see
3847 the file with the wrong ownership). There was no test for failure of this
3848 fork() call, which would lead to the process getting stuck as it waited
3849 for a non-existent subprocess. Forks do occasionally fail when resources
3850 run out. I reviewed all the other calls to fork(); they all seem to check
3853 PH/20 When checking for unexpected SMTP input at connect time (before writing
3854 the banner), Exim was not dealing correctly with a non-positive return
3855 from the read() function. If the client had disconnected by this time,
3856 the result was a log entry for a synchronization error with an empty
3857 string after "input=" when read() returned zero. If read() returned -1
3858 (an event I could not check), uninitialized data bytes were printed.
3859 There were reports of junk text (parts of files, etc) appearing after
3862 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3864 PH/22 Added support for macro redefinition, and (re)definition in between
3865 driver and ACL definitions.
3867 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3868 forgetting to use the resulting value; it was using the unexpanded value.
3870 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3871 hadn't been configured. The fix is from Juergen Kreileder, who
3872 understands it better than I do:
3874 "Here's what I see happening with three configured cyrus_sasl
3875 authenticators configured (plain, login, cram-md5):
3877 On startup auth_cyrus_sasl_init() gets called for each of these.
3878 This means three calls to sasl_listmech() without a specified mech_list.
3879 => SASL tests which mechs of all available mechs actually work
3880 => three warnings about OTP not working
3881 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3883 With the patch, sasl_listmech() also gets called three times. But now
3884 SASL's mech_list option is set to the server_mech specified in the the
3885 authenticator. Or in other words, the answer from sasl_listmech()
3886 gets limited to just the mech you're testing for (which is different
3888 => the return list contains just 'plain' or 'login', 'cram-md5' or
3889 nothing depending on the value of ob->server_mech.
3891 I've just tested the patch: Authentication still works fine,
3892 unavailable mechs specified in the exim configuration are still
3893 caught, and the auth.log warnings about OTP are gone."
3895 PH/25 When debugging is enabled, the contents of the command line are added
3896 to the debugging output, even when log_selector=+arguments is not
3899 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3900 answer is "GNU", and only if the return is "GNU/something" is the answer
3903 PH/27 $acl_verify_message is now set immediately after the failure of a
3904 verification in an ACL, and so is available in subsequent modifiers. In
3905 particular, the message can be preserved by coding like this:
3907 warn !verify = sender
3908 set acl_m0 = $acl_verify_message
3910 Previously, $acl_verify_message was set only while expanding "message"
3911 and "log_message" when a very denied access.
3913 PH/28 Modified OS/os.c-Linux with
3915 -#ifndef OS_LOAD_AVERAGE
3916 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3918 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3919 nomenclature these days.)
3921 PH/29 Installed patch from the Sieve maintainer that adds the options
3922 sieve_useraddress and sieve_subaddress to the redirect router.
3924 PH/30 In these circumstances:
3925 . Two addresses routed to the same list of hosts;
3926 . First host does not offer TLS;
3927 . First host accepts first address;
3928 . First host gives temporary error to second address;
3929 . Second host offers TLS and a TLS session is established;
3930 . Second host accepts second address.
3931 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3932 and peerdn, if requested) that were in fact used only for the second
3935 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3936 attention to any local part prefix or suffix that was matched by the
3937 router that accepted the address. It now behaves in the same way as it
3938 does for delivery: the affixes are removed from the local part unless
3939 rcpt_include_affixes is set on the transport.
3941 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3942 timeout during the DATA phase of an incoming message.
3944 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3945 applied a patch sanctioned by the Sieve maintainer.
3947 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3948 the uid or gid is negative. A case of a negative gid caused this to be
3949 noticed. The fix allows for either to be negative.
3951 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3952 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3955 PH/36 The change PH/12 above was broken. Fixed it.
3957 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3958 the grounds that routing the same address twice would always produce the
3959 same answer. This might have been true once, but it is certainly no
3960 longer true now. Routing a child address may depend on the previous
3961 routing that produced that child. Some complicated redirection strategies
3962 went wrong when messages had multiple recipients, and made Exim's
3963 behaviour dependent on the order in which the addresses were given.
3965 I have moved the duplicate checking until after the routing is complete.
3966 Exim scans the addresses that are assigned to local and remote
3967 transports, and removes any duplicates. This means that more work will be
3968 done, as duplicates will always all be routed, but duplicates are
3969 presumably rare, so I don't expect this is of any significance.
3971 For deliveries to pipes, files, and autoreplies, the duplicate checking
3972 still happens during the routing process, since they are not going to be
3975 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3976 It corrects a timeout issue with spamd. This is Ian's comment: "The
3977 background is that sometimes spamd either never reads data from a
3978 connection it has accepted, or it never writes response data. The exiscan
3979 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3980 blindly assumes that writes won't block so it may never time out."
3982 PH/39 Allow G after quota size as well as K and M.
3984 PH/40 The value set for $authenticated_id in an authenticator may not contain
3985 binary zeroes or newlines because the value is written to log lines and
3986 to spool files. There was no check on this. Now the value is run through
3987 the string_printing() function so that such characters are converted to
3988 printable escape sequences.
3990 PH/41 $message_linecount is a new variable that contains the total number of
3991 lines in the message. Compare $body_linecount, which is the count for the
3994 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3995 bounce and delay warning messages, except in certain special cases, which
3998 (a) An SMTP error message from a remote host;
3999 (b) A message specified in a :fail: redirection;
4000 (c) A message specified in a "fail" command in a system filter;
4001 (d) A message specified in a FAIL return from the queryprogram router;
4002 (e) A message specified by the cannot_route_message router option.
4004 In these cases only, Exim does include the error details in bounce and
4005 warning messages. There are also a few cases where bland messages such
4006 as "unrouteable address" or "local delivery error" are given.
4008 PH/43 $value is now also set for the "else" part of a ${run expansion.
4010 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4011 being worked on, but at least Exim now implements the latest version to
4014 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4015 process to complete was treated as a delivery failure, a timeout while
4016 writing the message to the pipe was logged, but erroneously treated as a
4017 successful delivery. Such timeouts include transport filter timeouts. For
4018 consistency with the overall process timeout, these timeouts are now
4019 treated as errors, giving rise to delivery failures by default. However,
4020 there is now a new Boolean option for the pipe transport called
4021 timeout_defer, which, if set TRUE, converts the failures into defers for
4022 both kinds of timeout. A transport filter timeout is now identified in
4025 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4026 systems where "make" and "gmake" are different, calling "gmake" at top
4027 level broke things. I've arranged for the value of $(MAKE) to be passed
4028 from the Makefile to this script so that it can call the same version of
4032 A note about Exim versions 4.44 and 4.50
4033 ----------------------------------------
4035 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4036 changes of various kinds. As a consequence, a big documentation update was
4037 needed. This delayed the release for rather longer than seemed good, especially
4038 in the light of a couple of (minor) security issues. Therefore, the changes
4039 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4040 release. So 4.44 and 4.50 are in effect two different branches that both start
4043 I have left the 4.50 change log unchanged; it contains all the changes since
4044 4.43. The change log for 4.44 is below; many of its items are identical to
4045 those for 4.50. This seems to be the most sensible way to preserve the
4046 historical information.
4052 1. Minor wording change to the doc/README.SIEVE file.
4054 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4055 computation of the current number of files was incorrect.
4057 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4058 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4061 4. Give more explanation in the error message when the command for a transport
4062 filter fails to execute.
4064 5. There are several places where Exim runs a non-Exim command in a
4065 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4066 was being done only for the command run by the queryprogram router. It is
4067 now done for all such subprocesses. The other cases are: ${run, transport
4068 filters, and the commands run by the lmtp and pipe transports.
4070 6. Added CONFIGURE_GROUP build-time option.
4072 7. Some older OS have a limit of 256 on the maximum number of file
4073 descriptors. Exim was using setrlimit() to set 1000 as a large value
4074 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4075 systems. I've change it so that if it can't get 1000, it tries for 256.
4077 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4078 was an oversight, and furthermore, ever since the addition of extra
4079 controls (e.g. 4.43/32), the checks on when to allow different forms of
4080 "control" were broken. There should now be diagnostics for all cases when a
4081 control that does not make sense is encountered.
4083 9. Added the /retain_sender option to "control=submission".
4085 10. $recipients is now available in the predata ACL (oversight).
4087 11. Tidy the search cache before the fork to do a delivery from a message
4088 received from the command line. Otherwise the child will trigger a lookup
4089 failure and thereby defer the delivery if it tries to use (for example) a
4090 cached ldap connection that the parent has called unbind on.
4092 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4093 of $address_data from the recipient verification was clobbered by the
4094 sender verification.
4096 13. The value of address_data from a sender verification is now available in
4097 $sender_address_data in subsequent conditions in the ACL statement.
4099 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4101 15. Added a new option "connect=<time>" to callout options, to set a different
4104 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4105 was its contents. (It was OK if the option was not defined at all.)
4107 17. A "Completed" log line is now written for messages that are removed from
4108 the spool by the -Mrm option.
4110 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4111 information about exactly what failed.
4113 19. Added -dd to debug only the daemon process.
4115 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4116 handles timeouts, both on the server side and network timeouts. Renamed the
4117 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4119 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4120 It is now set to "smtps".
4122 22. $host_address is now set to the target address during the checking of
4123 ignore_target_hosts.
4125 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4126 being passed; this would have caused $sender_host_name to have been used if
4127 matching the list had actually called for a host name (not very likely,
4128 since this list is usually IP addresses). A host name is now passed as
4131 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4132 code that specifies a non-restarting handler (typically sigaction() in
4133 modern systems) in an attempt to fix a rare and obscure crash bug.
4135 25. Narrowed the window for a race in the daemon that could cause it to ignore
4136 SIGCHLD signals. This is not a major problem, because they are used only to
4137 wake it up if nothing else does.
4139 26. A malformed maildirsize file could cause Exim to calculate negative values
4140 for the mailbox size or file count. Odd effects could occur as a result.
4141 The maildirsize information is now recalculated if the size or filecount
4144 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4145 support for a long time. Removed HAVE_SYS_VFS_H.
4147 28. Installed the latest version of exipick from John Jetmore.
4149 29. In an address list, if the pattern was not a regular expression, an empty
4150 subject address (from a bounce message) matched only if the pattern was an
4151 empty string. Non-empty patterns were not even tested. This was the wrong
4152 because it is perfectly reasonable to use an empty address as part of a
4153 database query. An empty address is now tested by patterns that are
4154 lookups. However, all the other forms of pattern expect the subject to
4155 contain a local part and a domain, and therefore, for them, an empty
4156 address still always fails if the pattern is not itself empty.
4158 30. Exim went into a mad DNS loop when attempting to do a callout where the
4159 host was specified on an smtp transport, and looking it up yielded more
4160 than one IP address.
4162 31. Re-factored the code for checking spool and log partition space into a
4163 function that finds that data and another that does the check. The former
4164 is then used to implement four new variables: $spool_space, $log_space,
4165 $spool_inodes, and $log_inodes.
4167 32. The RFC2047 encoding function was originally intended for short strings
4168 such as real names; it was not keeping to the 75-character limit for
4169 encoded words that the RFC imposes. It now respects the limit, and
4170 generates multiple encoded words if necessary. To be on the safe side, I
4171 have increased the buffer size for the ${rfc2047: expansion operator from
4174 33. It is now permitted to omit both strings after an "if" condition; if the
4175 condition is true, the result is "true". As before, when the second string
4176 is omitted, a false condition yields an empty string. This makes it less
4177 cumbersome to write custom ACL and router conditions.
4179 34. Failure to deliver a bounce message always caused it to be frozen, even if
4180 there was an errors_to setting on the router. The errors_to setting is now
4183 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4184 canonical form (fully expanded) before being placed in
4185 $sender_host_address.
4187 36. The table in the code that translates DNS record types into text (T_A to
4188 "A" for instance) was missing entries for NS and CNAME. It is just possible
4189 that this could have caused confusion if both these types were looked up
4190 for the same domain, because the text type is used as part of Exim's
4191 per-process caching. But the chance of anyone hitting this buglet seems
4194 37. The dnsdb lookup has been extended in a number of ways.
4196 (1) There is a new type, "zns", which walks up the domain tree until it
4197 finds some nameserver records. It should be used with care.
4199 (2) There is a new type, "mxh", which is like "mx" except that it returns
4200 just the host names, not the priorities.
4202 (3) It is now possible to give a list of domains (or IP addresses) to be
4203 looked up. The behaviour when one of the lookups defers can be
4204 controlled by a keyword.
4206 (4) It is now possible to specify the separator character for use when
4207 multiple records are returned.
4209 38. The dnslists ACL condition has been extended: it is now possible to supply
4210 a list of IP addresses and/or domains to be looked up in a particular DNS
4213 39. Added log_selector=+queue_time_overall.
4215 40. When running the queue in the test harness, wait just a tad after forking a
4216 delivery process, to get repeatability of debugging output.
4218 41. Include certificate and key file names in error message when GnuTLS fails
4219 to set them up, because the GnuTLS error message doesn't include the name
4220 of the failing file when there is a problem reading it.
4222 42. Allow both -bf and -bF in the same test run.
4224 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4226 44. The "Exiscan patch" is now merged into the mainline Exim source.
4228 45. Sometimes the final signoff response after QUIT could fail to get
4229 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4230 < 0 before doing a fflush(). This bug looks as though it goes back to the
4231 introduction of TLS in release 3.20, but "sometimes" must have been rare
4232 because the tests only now provoked it.
4234 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4235 (this can affect the format of dates).
4237 47. exim_tidydb, when checking for the continued existence of a message for
4238 which it has found a message-specific retry record, was not finding
4239 messages that were in split spool directories. Consequently, it was
4240 deleting retry records that should have stayed in existence.
4242 48. Steve fixed some bugs in eximstats.
4244 49. The SPA authentication driver was not abandoning authentication and moving
4245 on to the next authenticator when an expansion was forced to fail,
4246 contradicting the general specification for all authenticators. Instead it
4247 was generating a temporary error. It now behaves as specified.
4249 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4250 (the order specifies the preference for clients). The order is now AES256,
4251 AES128, 3DES, ARCFOUR128.
4253 51. Small patch to Sieve code - explicitly set From: when generating an
4256 52. Exim crashed if a remote delivery caused a very long error message to be
4257 recorded - for instance if somebody sent an entire SpamAssassin report back
4258 as a large number of 550 error lines. This bug was coincidentally fixed by
4259 increasing the size of one of Exim's internal buffers (big_buffer) that
4260 happened as part of the Exiscan merge. However, to be on the safe side, I
4261 have made the code more robust (and fixed the comments that describe what
4264 53. Now that there can be additional text after "Completed" in log lines (if
4265 the queue_time_overall log selector is set), a one-byte patch to exigrep
4266 was needed to allow it to recognize "Completed" as not the last thing in
4269 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4270 patch that reportedly fixes this has been added. I am not expert enough to
4271 create a test for it. This is what the patch creator wrote:
4273 "I found a little strange behaviour of ldap code when working with
4274 Windows 2003 AD Domain, where users was placed in more than one
4275 Organization Units. When I tried to give exim partial DN, the exit code
4276 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4277 But simultaneously result of request was absolutely normal ldap result,
4278 so I produce this patch..."
4280 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4281 REFERENCE, so I have modified the code to exclude the patch when that macro
4284 55. Some experimental protocols are using DNS PTR records for new purposes. The
4285 keys for these records are domain names, not reversed IP addresses. The
4286 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4287 leaves it alone. Component reversal etc. now happens only for IP addresses.
4290 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4292 57. Double the size of the debug message buffer (to 2048) so that more of very
4293 long debug lines gets shown.
4295 58. The exicyclog utility now does better if the number of log files to keep
4296 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4298 59. Two changes related to the smtp_active_hostname option:
4300 (1) $smtp_active_hostname is now available as a variable.
4301 (2) The default for smtp_banner uses $smtp_active_hostname instead
4302 of $primary_hostname.
4304 60. The host_aton() function is supposed to be passed a string that is known
4305 to be a valid IP address. However, in the case of IPv6 addresses, it was
4306 not checking this. This is a hostage to fortune. Exim now panics and dies
4307 if the condition is not met. A case was found where this could be provoked
4308 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4309 components; fortuitously, this particular loophole had already been fixed
4310 by change 4.50/55 above.
4312 If there are any other similar loopholes, the new check in host_aton()
4313 itself should stop them being exploited. The report I received stated that
4314 data on the command line could provoke the exploit when Exim was running as
4315 exim, but did not say which command line option was involved. All I could
4316 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4317 running as the user.
4320 61. There was a buffer overflow vulnerability in the SPA authentication code
4321 (which came originally from the Samba project). I have added a test to the
4322 spa_base64_to_bits() function which I hope fixes it.
4325 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4326 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4328 63. The daemon start-up calls getloadavg() while still root for those OS that
4329 need the first call to be done as root, but it missed one case: when
4330 deliver_queue_load_max is set with deliver_drop_privilege. This is
4331 necessary for the benefit of the queue runner, because there is no re-exec
4332 when deliver_drop_privilege is set.
4334 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4335 This has been fixed.
4337 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4338 was in use, was not putting the data itself into the right store pool;
4339 consequently, it could be overwritten for a subsequent message in the same
4340 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4343 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4345 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4346 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4347 the function were treating the return as a boolean value, which happened to
4348 work because 0=false and not-0=true, but is not correct code.
4350 68. The host_aton() function was not handling scoped IPv6 addresses (those
4351 with, for example, "%eth0" on the end) correctly.
4353 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4354 negated items (that is, ~something) in unsigned ints. Some compilers
4355 apparently mutter when there is no cast.
4357 70. If an address verification called from an ACL failed, and did not produce a
4358 user-specific message (i.e. there was only a "system" message), nothing was
4359 put in $acl_verify_message. In this situation, it now puts the system
4362 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4363 session; change 4.31/43 added the unwanted input to the log line - except
4364 that it did not do this in the start of session case. It now does.
4366 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4367 This is wrong and can cause the other end to generate a synchronization
4368 error if it is another Exim or anything else that does the synchronization
4369 check. A QUIT command is no longer sent after a timeout.
4371 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4372 during host lookups.
4374 74. The defer_ok option of callout verification was not working if it was used
4375 when verifying addresses in header lines, that is, for this case:
4377 verify = header_sender/callout=defer_ok
4379 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4380 those file descriptors could be used for SMTP connections. If anything
4381 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4382 could be sent to the SMTP client, causing chaos. The daemon now opens
4383 stdin, stdout, and stderr to /dev/null when it puts itself into the
4386 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4387 log by default. The user can override this with suitable Perl magic.
4389 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4390 the log message when discard triggers, was not working for the DATA ACL or
4391 for the non-SMTP ACL.
4393 78. Error message wording change in sieve.c.
4395 79. If smtp_accept_max_per_host was set, the number of connections could be
4396 restricted to fewer than expected, because the daemon was trying to set up
4397 a new connection before checking whether the processes handling previous
4398 connections had finished. The check for completed processes is now done
4399 earlier. On busy systems, this bug wouldn't be noticed because something
4400 else would have woken the daemon, and it would have reaped the completed
4403 80. If a message was submitted locally by a user whose login name contained one
4404 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4405 It caused a spool format error. I have fixed the spool reading code. A
4406 related problem was that the "from" clause in the Received: line became
4407 illegal because of the space(s). It is now covered by ${quote_local_part.
4409 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4412 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4414 83. Patch from Sieve maintainer to fix unterminated string problem in
4415 "vacation" handling.
4417 84. Some minor changes to the Linux configuration files to help with other
4418 OS variants using glibc.
4420 85. One more patch for Sieve to update vacation handling to latest spec.
4423 ----------------------------------------------------
4424 See the note above about the 4.44 and 4.50 releases.
4425 ----------------------------------------------------
4431 1. Change 4.43/35 introduced a bug that caused file counts to be
4432 incorrectly computed when quota_filecount was set in an appendfile
4435 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4436 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4439 3. Give more explanation in the error message when the command for a transport
4440 filter fails to execute.
4442 4. There are several places where Exim runs a non-Exim command in a
4443 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4444 was being done only for the command run by the queryprogram router. It is
4445 now done for all such subprocesses. The other cases are: ${run, transport
4446 filters, and the commands run by the lmtp and pipe transports.
4448 5. Some older OS have a limit of 256 on the maximum number of file
4449 descriptors. Exim was using setrlimit() to set 1000 as a large value
4450 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4451 systems. I've change it so that if it can't get 1000, it tries for 256.
4453 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4454 was an oversight, and furthermore, ever since the addition of extra
4455 controls (e.g. 4.43/32), the checks on when to allow different forms of
4456 "control" were broken. There should now be diagnostics for all cases when a
4457 control that does not make sense is encountered.
4459 7. $recipients is now available in the predata ACL (oversight).
4461 8. Tidy the search cache before the fork to do a delivery from a message
4462 received from the command line. Otherwise the child will trigger a lookup
4463 failure and thereby defer the delivery if it tries to use (for example) a
4464 cached ldap connection that the parent has called unbind on.
4466 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4467 of $address_data from the recipient verification was clobbered by the
4468 sender verification.
4470 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4471 was its contents. (It was OK if the option was not defined at all.)
4473 11. A "Completed" log line is now written for messages that are removed from
4474 the spool by the -Mrm option.
4476 12. $host_address is now set to the target address during the checking of
4477 ignore_target_hosts.
4479 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4480 being passed; this would have caused $sender_host_name to have been used if
4481 matching the list had actually called for a host name (not very likely,
4482 since this list is usually IP addresses). A host name is now passed as
4485 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4486 code that specifies a non-restarting handler (typically sigaction() in
4487 modern systems) in an attempt to fix a rare and obscure crash bug.
4489 15. Narrowed the window for a race in the daemon that could cause it to ignore
4490 SIGCHLD signals. This is not a major problem, because they are used only to
4491 wake it up if nothing else does.
4493 16. A malformed maildirsize file could cause Exim to calculate negative values
4494 for the mailbox size or file count. Odd effects could occur as a result.
4495 The maildirsize information is now recalculated if the size or filecount
4498 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4499 support for a long time. Removed HAVE_SYS_VFS_H.
4501 18. Updated exipick to current release from John Jetmore.
4503 19. Allow an empty sender to be matched against a lookup in an address list.
4504 Previously the only cases considered were a regular expression, or an
4507 20. Exim went into a mad DNS lookup loop when doing a callout where the
4508 host was specified on the transport, if the DNS lookup yielded more than
4511 21. The RFC2047 encoding function was originally intended for short strings
4512 such as real names; it was not keeping to the 75-character limit for
4513 encoded words that the RFC imposes. It now respects the limit, and
4514 generates multiple encoded words if necessary. To be on the safe side, I
4515 have increased the buffer size for the ${rfc2047: expansion operator from
4518 22. Failure to deliver a bounce message always caused it to be frozen, even if
4519 there was an errors_to setting on the router. The errors_to setting is now
4522 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4523 canonical form (fully expanded) before being placed in
4524 $sender_host_address.
4526 24. Updated eximstats to version 1.33
4528 25. Include certificate and key file names in error message when GnuTLS fails
4529 to set them up, because the GnuTLS error message doesn't include the name
4530 of the failing file when there is a problem reading it.
4532 26. Expand error message when OpenSSL has problems setting up cert/key files.
4535 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4536 (this can affect the format of dates).
4538 28. exim_tidydb, when checking for the continued existence of a message for
4539 which it has found a message-specific retry record, was not finding
4540 messages that were in split spool directories. Consequently, it was
4541 deleting retry records that should have stayed in existence.
4543 29. eximstats updated to version 1.35
4544 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4545 1.35 - bugfix such that pie charts by volume are generated correctly
4547 30. The SPA authentication driver was not abandoning authentication and moving
4548 on to the next authenticator when an expansion was forced to fail,
4549 contradicting the general specification for all authenticators. Instead it
4550 was generating a temporary error. It now behaves as specified.
4552 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4553 (the order specifies the preference for clients). The order is now AES256,
4554 AES128, 3DES, ARCFOUR128.
4556 31. Small patch to Sieve code - explicitly set From: when generating an
4559 32. Exim crashed if a remote delivery caused a very long error message to be
4560 recorded - for instance if somebody sent an entire SpamAssassin report back
4561 as a large number of 550 error lines. This bug was coincidentally fixed by
4562 increasing the size of one of Exim's internal buffers (big_buffer) that
4563 happened as part of the Exiscan merge. However, to be on the safe side, I
4564 have made the code more robust (and fixed the comments that describe what
4567 33. Some experimental protocols are using DNS PTR records for new purposes. The
4568 keys for these records are domain names, not reversed IP addresses. The
4569 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4570 leaves it alone. Component reversal etc. now happens only for IP addresses.
4573 34. The host_aton() function is supposed to be passed a string that is known
4574 to be a valid IP address. However, in the case of IPv6 addresses, it was
4575 not checking this. This is a hostage to fortune. Exim now panics and dies
4576 if the condition is not met. A case was found where this could be provoked
4577 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4578 components; fortuitously, this particular loophole had already been fixed
4579 by change 4.50/55 or 4.44/33 above.
4581 If there are any other similar loopholes, the new check in host_aton()
4582 itself should stop them being exploited. The report I received stated that
4583 data on the command line could provoke the exploit when Exim was running as
4584 exim, but did not say which command line option was involved. All I could
4585 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4586 running as the user.
4589 35. There was a buffer overflow vulnerability in the SPA authentication code
4590 (which came originally from the Samba project). I have added a test to the
4591 spa_base64_to_bits() function which I hope fixes it.
4594 36. The daemon start-up calls getloadavg() while still root for those OS that
4595 need the first call to be done as root, but it missed one case: when
4596 deliver_queue_load_max is set with deliver_drop_privilege. This is
4597 necessary for the benefit of the queue runner, because there is no re-exec
4598 when deliver_drop_privilege is set.
4600 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4601 was in use, was not putting the data itself into the right store pool;
4602 consequently, it could be overwritten for a subsequent message in the same
4603 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4606 38. Sometimes the final signoff response after QUIT could fail to get
4607 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4608 < 0 before doing a fflush(). This bug looks as though it goes back to the
4609 introduction of TLS in release 3.20, but "sometimes" must have been rare
4610 because the tests only now provoked it.
4616 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4617 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4618 Now it returns an integer. A number of calls were still expecting a T/F
4619 return. Fortuitously, in all cases, the tests worked in OK situations,
4620 which is the norm. However, things would have gone wrong on any write
4621 failures on the smtp file descriptor. This function is used when sending
4622 messages over SMTP and also when doing verify callouts.
4624 2. When Exim is called to do synchronous delivery of a locally submitted
4625 message (the -odf or -odi options), it no longer closes stderr before doing
4628 3. Implemented the mua_wrapper option.
4630 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4632 5. Implemented the functions header_remove(), header_testname(),
4633 header_add_at_position(), and receive_remove_recipient(), and exported them
4636 6. If an ACL "warn" statement specified the addition of headers, Exim already
4637 inserted X-ACL-Warn: at the start if there was no header name. However, it
4638 was not making this test for the second and subsequent header lines if
4639 there were newlines in the string. This meant that an invalid header could
4640 be inserted if Exim was badly configured.
4642 7. Allow an ACL "warn" statement to add header lines at the start or after all
4643 the Received: headers, as well as at the end.
4645 8. Added the rcpt_4xx retry error code.
4647 9. Added postmaster_mailfrom=xxx to callout verification option.
4649 10. Added mailfrom=xxxx to the callout verification option, for verify=
4652 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4653 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4655 12. Inserted some casts to stop certain compilers warning when using pointer
4656 differences as field lengths or precisions in printf-type calls (mostly
4657 affecting debugging statements).
4659 13. Added optional readline() support for -be (dynamically loaded).
4661 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4662 same clock tick as a message's arrival, so that its received time was the
4663 same as the "first fail" time on the retry record, and that message
4664 remained on the queue past the ultimate address timeout, every queue runner
4665 would try a delivery (because it was past the ultimate address timeout) but
4666 after another failure, the ultimate address timeout, which should have then
4667 bounced the address, did not kick in. This was a "< instead of <=" error;
4668 in most cases the first failure would have been in the next clock tick
4669 after the received time, and all would be well.
4671 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4672 being recognized when the domain list was tested by the match_domain
4673 condition in an expansion string.
4675 16. Added the ${str2b64: operator.
4677 17. Exim was always calling setrlimit() to set a large limit for the number of
4678 processes, without checking whether the existing limit was already
4679 adequate. (It did check for the limit on file descriptors.) Furthermore,
4680 errors from getrlimit() and setrlimit() were being ignored. Now they are
4681 logged to the main and panic logs, but Exim does carry on, to try to do its
4682 job under whatever limits there are.
4684 18. Imported PCRE 5.0.
4686 19. Trivial typo in log message " temporarily refused connection" (the leading
4689 20. If the log selector return_path_on_delivery was set and an address was
4690 redirected to /dev/null, the delivery process crashed because it assumed
4691 that a return path would always be set for a "successful" delivery. In this
4692 case, the whole delivery is bypassed as an optimization, and therefore no
4695 21. Internal re-arrangement: the function for sending a challenge and reading
4696 a response while authentication was assuming a zero-terminated challenge
4697 string. It's now changed to take a pointer and a length, to allow for
4698 binary data in such strings.
4700 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4702 23. Exim was not respecting finduser_retries when seeking the login of the
4703 uid under which it was called; it was always trying 10 times. (The default
4704 setting of finduser_retries is zero.) Also, it was sleeping after the final
4705 failure, which is pointless.
4707 24. Implemented tls_on_connect_ports.
4709 25. Implemented acl_smtp_predata.
4711 26. If the domain in control=submission is set empty, Exim assumes that the
4712 authenticated id is a complete email address when it generates From: or
4713 Sender: header lines.
4715 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4716 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4717 chown and chgrp in /bin and hostname in /usr/bin.
4719 28. Exim was keeping the "process log" file open after each use, just as it
4720 does for the main log. This opens the possibility of it remaining open for
4721 long periods when the USR1 signal hits a daemon. Occasional processlog
4722 errors were reported, that could have been caused by this. Anyway, it seems
4723 much more sensible not to leave this file open at all, so that is what now
4726 29. The long-running daemon process does not normally write to the log once it
4727 has entered its main loop, and it closes the log before doing so. This is
4728 so that log files can straightforwardly be renamed and moved. However,
4729 there are a couple of unusual error situations where the daemon does write
4730 log entries, and I had neglected to close the log afterwards.
4732 30. The text of an SMTP error response that was received during a remote
4733 delivery was being truncated at 512 bytes. This is too short for some of
4734 the long messages that one sometimes sees. I've increased the limit to
4737 31. It is now possible to make retry rules that apply only when a message has a
4738 specific sender, in particular, an empty sender.
4740 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4741 it possible to be selective about when SMTP synchronization is enforced.
4743 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4745 32. Implemented hosts_connection_nolog.
4747 33. Added an ACL for QUIT.
4749 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4752 35. Added mailbox_size and mailbox_filecount to appendfile.
4754 36. Added control = no_multiline_responses to ACLs.
4756 37. There was a bug in the logic of the code that waits for the clock to tick
4757 in the case where the clock went backwards by a substantial amount such
4758 that the microsecond fraction of "now" was more than the microsecond
4759 fraction of "then" (but the whole seconds number was less).
4761 38. Added support for the libradius Radius client library this is found on
4762 FreeBSD (previously only the radiusclient library was supported).
4768 1. When certain lookups returned multiple values in the form name=value, the
4769 quoting of the values was not always being done properly. Specifically:
4770 (a) If the value started with a double quote, but contained no whitespace,
4772 (b) If the value contained whitespace other than a space character (i.e.
4773 tabs or newlines or carriage returns) it was not quoted.
4774 This fix has been applied to the mysql and pgsql lookups by writing a
4775 separate quoting function and calling it from the lookup code. The fix
4776 should probably also be applied to nisplus, ibase and oracle lookups, but
4777 since I cannot test any of those, I have not disturbed their existing code.
4779 2. A hit in the callout cache for a specific address caused a log line with no
4780 reason for rejecting RCPT. Now it says "Previous (cached) callout
4781 verification failure".
4783 3. There was an off-by-one bug in the queryprogram router. An over-long
4784 return line was truncated at 256 instead of 255 characters, thereby
4785 overflowing its buffer with the terminating zero. As well as fixing this, I
4786 have increased the buffer size to 1024 (and made a note to document this).
4788 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4789 when Exim is waiting for an SMTP response from a remote server, Exim
4790 restarts its select() call on the socket, thereby resetting its timeout.
4791 This is not a problem when such interrupts are rare. Somebody set up a cron
4792 job to run exiwhat every 2 minutes, which is less than the normal select()
4793 timeout (5 or 10 minutes). This meant that the select() timeout never
4794 kicked in because it was always reset. I have fixed this by comparing the
4795 time when an interrupt arrives with the time at the start of the first call
4796 to select(). If more time than the timeout has elapsed, the interrupt is
4797 treated as a timeout.
4799 5. Some internal re-factoring in preparation for the addition of Sieve
4800 extensions (by MH). In particular, the "personal" test is moved to a
4801 separate function, and given an option for scanning Cc: and Bcc: (which is
4802 not set for Exim filters).
4804 6. When Exim created an email address using the login of the caller as the
4805 local part (e.g. when creating a From: or Sender: header line), it was not
4806 quoting the local part when it contained special characters such as @.
4808 7. Installed new OpenBSD configuration files.
4810 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4811 try to make them clearer.
4813 9. Callout options, other than the timeout value, were being ignored when
4814 verifying sender addresses in header lines. For example, when using
4816 verify = header_sender/callout=no_cache
4818 the cache was (incorrectly) being used.
4820 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4821 only the Cygwin environment.
4823 11. When return_path_on_delivery was set as a log selector, if different remote
4824 addresses in the same message used different return paths and parallel
4825 remote delivery occurred, the wrong values would sometimes be logged.
4826 (Whenever a remote delivery process finished, the return path value from
4827 the most recently started remote delivery process was logged.)
4829 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4830 lines when AUTH and/or TLS are in use. This is the "received protocol"
4831 field. Exim used to use "asmtp" for authenticated SMTP, without any
4832 indication (in the protocol name) for TLS use. Now it follows the RFC and
4833 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4834 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4835 names appear in log lines as well as in Received: header lines.
4837 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4838 extensions, and comparison tests, and to fix some bugs.
4840 14. Changes to the "personal" filter test:
4842 (1) The test was buggy in that it was just doing the equivalent of
4843 "contains" tests on header lines. For example, if a user's address was
4844 anne@some.where, the "personal" test would incorrectly be true for
4846 To: susanne@some.where
4848 This test is now done by extracting each address from the header in turn,
4849 and checking the entire address. Other tests that are part of "personal"
4850 are now done using regular expressions (for example, to check local parts
4851 of addresses in From: header lines).
4853 (2) The list of non-personal local parts in From: addresses has been
4854 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4855 taken from the Sieve specification recommendations.
4857 (3) If the message contains any header line starting with "List-" it is
4858 treated as non-personal.
4860 (4) The test for "circular" in the Subject: header line has been removed
4861 because it now seems ill-conceived.
4863 15. Minor typos in src/EDITME comments corrected.
4865 16. Installed latest exipick from John Jetmore.
4867 17. If headers_add on a router specified a text string that was too long for
4868 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4869 of string_sprintf() is now avoided.
4871 18. $message_body_size was not set (it was always zero) when running the DATA
4872 ACL and the local_scan() function.
4874 19. For the "mail" command in an Exim filter, no default was being set for
4875 the once_repeat time, causing a random time value to be used if "once" was
4876 specified. (If the value happened to be <= 0, no repeat happened.) The
4877 default is now 0s, meaning "never repeat". The "vacation" command was OK
4878 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4879 (I found it when inspecting the code).
4881 20. There is now an overall timeout for performing a callout verification. It
4882 defaults to 4 times the callout timeout, which applies to individual SMTP
4883 commands during the callout. The overall timeout applies when there is more
4884 than one host that can be tried. The timeout is checked before trying the
4885 next host. This prevents very long delays if there are a large number of
4886 hosts and all are timing out (e.g. when the network connections are timing
4887 out). The value of the overall timeout can be changed by specifying an
4888 additional sub-option for "callout", called "maxwait". For example:
4890 verify = sender/callout=5s,maxwait=20s
4892 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4893 to the end before writing, but this should make it even safer).
4895 22. Exim was forgetting that it had advertised PIPELINING for the second and
4896 subsequent messages on an SMTP connection. It was also not resetting its
4897 memory on STARTTLS and an internal HELO.
4899 23. When Exim logs an SMTP synchronization error within a session, it now
4900 records whether PIPELINING has been advertised or not.
4902 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4903 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4904 rather than long int.
4906 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4908 26. Added the never_mail option to autoreply.
4914 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4915 crash if the getsockname() call failed; this can happen if a connection is
4916 closed very soon after it is established. The problem was simply in the
4917 order in which certain operations were done, causing Exim to try to write
4918 to the SMTP stream before it had set up the file descriptor. The bug has
4919 been fixed by making things happen in the correct order.
4925 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4926 before the connection was closed, thus losing the rejection response.
4928 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4929 some early Solaris releases, but causes trouble in current releases where
4930 socklen_t is defined.
4932 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4935 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4938 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4939 that releasing the top of it at the end releases what was used for sub-
4940 expansions (unless the block got too big). However, discard this block if
4941 the first thing is a variable or header, so that we can use its block when
4942 it is dynamic (useful for very large $message_headers, for example).
4944 6. Lookups now cache *every* query, not just the most recent. A new, separate
4945 store pool is used for this. It can be recovered when all lookup caches are
4946 flushed. Lookups now release memory at the end of their result strings.
4947 This has involved some general refactoring of the lookup sources.
4949 7. Some code has been added to the store_xxx() functions to reduce the amount
4950 of flapping under certain conditions.
4952 8. log_incoming_interface used to affect only the <= reception log lines. Now
4953 it causes the local interface and port to be added to several more SMTP log
4954 lines, for example "SMTP connection from", and rejection lines.
4956 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4958 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4960 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4961 could be overwritten at the end of the current message (or the start of a
4962 new message if it was set in a HELO ACL). The value is now preserved for
4963 the duration of the SMTP connection.
4965 12. If a transport had a headers_rewrite setting, and a matching header line
4966 contained an unqualified address, that address was qualified, even if it
4967 did not match any rewriting rules. The underlying bug was that the values
4968 of the flags that permit the existence of unqualified sender and recipient
4969 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4970 non-local messages, and by -bnq for local messages) were not being
4971 preserved with the message after it was received.
4973 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4974 "next input=" as part of the text comprising the host identity instead of
4975 the correct text. The code was using the same buffer for two different
4976 strings. However, depending on which order the printing function evaluated
4977 its arguments, the bug did not always show up. Under Linux, for example, my
4978 test suite worked just fine.
4980 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4981 doesn't work with some older versions of Perl. It has been changed to "my",
4982 which in any case is probably the better facility to use.
4984 15. A really picky compiler found some instances of statements for creating
4985 error messages that either had too many or two few arguments for the format
4988 16. The size of the buffer for calls to the DNS resolver has been increased
4989 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4990 for addresses that have a lot of PTR records. This alleviates a problem; it
4991 does not fully solve it.
4993 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4994 buffer now truncates the list and logs the incident, which is the same
4995 action as happens when Exim is looking up a host name and its aliases.
4996 Previously in this situation something unpredictable would happen;
4997 sometimes it was "internal error: store_reset failed".
4999 18. If a server dropped the connection unexpectedly when an Exim client was
5000 using GnuTLS and trying to read a response, the client delivery process
5001 crashed while trying to generate an error log message.
5003 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5004 string, for example:
5006 warn message = H1: something\nH2: something
5008 the text was added as a single header line from Exim's point of view
5009 though it ended up OK in the delivered message. However, searching for the
5010 second and subsequent header lines using $h_h2: did not work. This has been
5011 fixed. Similarly, if a system filter added multiple headers in this way,
5012 the routers could not see them.
5014 20. Expanded the error message when iplsearch is called with an invalid key to
5015 suggest using net-iplsearch in a host list.
5017 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5018 ACLs are no longer actually imposed (and a message to that effect is
5021 22. If a "gecos" field in a passwd entry contained escaped characters, in
5022 particular, if it contained a \" sequence, Exim got it wrong when building
5023 a From: or a Sender: header from that name. A second bug also caused
5024 incorrect handling when an unquoted " was present following a character
5025 that needed quoting.
5027 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5028 was not being matched caselessly.
5030 24. Arranged for all hyphens in the exim.8 source to be escaped with
5033 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5034 properly. Recipient callout cache records were still being keyed to include
5035 the sender, even when use_sender was set false. This led to far more
5036 callouts that were necessary. The sender is no longer included in the key
5037 when use_sender is false.
5039 26. Added "control = submission" modifier to ACLs.
5041 27. Added the ${base62d: operator to decode base 62 numbers.
5043 28. dnsdb lookups can now access SRV records.
5045 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5046 the configuration file.
5048 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5049 (-v) mode. This makes the output for a verbose queue run more intelligible.
5051 31. Added a use_postmaster feature to recipient callouts.
5053 32. Added the $body_zerocount variable, containing the number of binary zero
5054 bytes in the message body.
5056 33. The time of last modification of the "new" subdirectory is now used as the
5057 "mailbox time last read" when there is a quota error for a maildir
5060 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5062 35. Added +ignore_unknown as a special item in host lists.
5064 36. Code for decoding IPv6 addresses in host lists is now included, even if
5065 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5066 address was recognized as an IP address, but was then not correctly decoded
5067 into binary, causing unexpected and incorrect effects when compared with
5074 1. Very minor rewording of debugging text in manualroute to say "list of
5075 hosts" instead of "hostlist".
5077 2. If verify=header_syntax was set, and a header line with an unqualified
5078 address (no domain) and a large number of spaces between the end of the
5079 name and the colon was received, the reception process suffered a buffer
5080 overflow, and (when I tested it) crashed. This was caused by some obsolete
5081 code that should have been removed. The fix is to remove it!
5083 3. When running in the test harness, delay a bit after writing a bounce
5084 message to get a bit more predictability in the log output.
5086 4. Added a call to search_tidyup() just before forking a reception process. In
5087 theory, someone could use a lookup in the expansion of smtp_accept_max_
5088 per_host which, without the tidyup, could leave open a database connection.
5090 5. Added the variables $recipient_data and $sender_data which get set from a
5091 lookup success in an ACL "recipients" or "senders" condition, or a router
5092 "senders" option, similar to $domain_data and $local_part_data.
5094 6. Moved the writing of debug_print from before to after the "senders" test
5097 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5098 problems for message scanning, either using a data ACL, or using
5099 local_scan() because the Received: header was not generated till after they
5100 were called (in order to set the time as the time of reception completion).
5101 I have revised the way this works. The header is now generated after the
5102 body is received, but before the ACL or local_scan() are called. After they
5103 are run, the timestamp in the header is updated.
5109 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5110 before starting a queue runner without re-exec. This happened only when
5111 deliver_drop_privilege was set or when the Exim user was set to root. The
5112 effect of the bug was that timeouts during subsequent deliveries caused
5113 crashes instead of being properly handled. The handler is now left at its
5114 default (and expected) setting.
5116 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5117 message, again when deliver_drop_privilege is set or Exim is run as root.
5118 The bug described in (1) was not present in this case, but the tidying up
5119 of the other signals was missing. I have made the two cases consistent.
5121 3. The ignore_target_hosts setting on a manualroute router was being ignored
5122 for hosts that were looked up using the /MX notation.
5124 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5127 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5128 operated on the sender address. After changing the $sender_address to <>
5129 for the sender address verify, Exim was re-instated it as the original
5130 (before rewriting) address, but remembering that it had rewritten it, so it
5131 wasn't rewriting it again. This bug also had the effect of breaking the
5132 sender address verification caching when the sender address was rewritten.
5134 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5135 This has been changed so that if the ip literal address matches
5136 ignore_target_hosts, the router declines.
5138 7. Added expansion conditions match_domain, match_address, and match_local_
5139 part (NOT match_host).
5141 8. The placeholder for the Received: header didn't have a length field set.
5143 9. Added code to Exim itself and to exim_lock to test for a specific race
5144 condition that could lead to file corruption when using MBX delivery. The
5145 issue is with the lockfile that is created in /tmp. If this file is removed
5146 after a process has opened it but before that process has acquired a lock,
5147 there is the potential for a second process to recreate the file and also
5148 acquire a lock. This could lead to two Exim processes writing to the file
5149 at the same time. The added code performs the same test as UW imapd; it
5150 checks after acquiring the lock that its file descriptor still refers to
5151 the same named file.
5153 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5154 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5157 11. Added the smtp_active_hostname option. If used, this will typically be made
5158 to depend on the incoming interface address. Because $interface_address is
5159 not set up until the daemon has forked a reception process, error responses
5160 that can happen earlier (such as "too many connections") no longer contain
5163 12. If an expansion in a condition on a "warn" statement fails because a lookup
5164 defers, the "warn" statement is abandoned, and the next ACL statement is
5165 processed. Previously this caused the whole ACL to be aborted.
5167 13. Added the iplsearch lookup type.
5169 14. Added ident_timeout as a log selector.
5171 15. Added tls_certificate_verified as a log selector.
5173 16. Added a global option tls_require_ciphers (compare the smtp transport
5174 option of the same name). This controls incoming TLS connections.
5176 17. I finally figured out how to make tls_require_ciphers do a similar thing
5177 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5178 before starting the TLS session.
5180 18. Tabs are now shown as \t in -bP output.
5182 19. If the log selector return_path_on_delivery was set, Exim crashed when
5183 bouncing a message because it had too many Received: header lines.
5185 20. If two routers both had headers_remove settings, and the first one included
5186 a superfluous trailing colon, the final name in the first list and the
5187 first name in the second list were incorrectly joined into one item (with a
5188 colon in the middle).
5194 1. Added -C and -D options to the exinext utility, mainly to make it easier
5195 to include in the automated testing, but these could be helpful when
5196 multiple configurations are in use.
5198 2. The exinext utility was not formatting the output nicely when there was
5199 an alternate port involved in the retry record key, nor when there was a
5200 message id as well (for retries that were specific to a specific message
5201 and a specific host). It was also confused by IPv6 addresses, because of
5202 the additional colons they contain. I have fixed the IPv4 problem, and
5203 patched it up to do a reasonable job for IPv6.
5205 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5206 delivery, the log line now contains "pipelined" if PIPELINING was used.
5208 4. An SMTP transport process used to panic and die if the bind() call to set
5209 an explicit outgoing interface failed. This has been changed; it is now
5210 treated in the same way as a connect() failure.
5212 5. A reference to $sender_host_name in the part of a conditional expansion
5213 that was being skipped was still causing a DNS lookup. This no longer
5216 6. The def: expansion condition was not recognizing references to header lines
5217 that used bh_ and bheader_.
5219 7. Added the _cache feature to named lists.
5221 8. The code for checking quota_filecount in the appendfile transport was
5222 allowing one more file than it should have been.
5224 9. For compatibility with Sendmail, the command line option
5232 and sets the incoming protocol and host name (for trusted callers). The
5233 host name and its colon can be omitted when only the protocol is to be set.
5234 Note the Exim already has two private options, -pd and -ps, that refer to
5235 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5236 "s", but I don't think that's a major issue.
5238 10. A number of refactoring changes to the code, none of which should affect
5241 (a) The number of logging options was getting close to filling up the
5242 32-bit word that was used as a bit map. I have split them into two classes:
5243 those that are passed in the argument to log_write(), and those that are
5244 only ever tested independently outside of that function. These are now in
5245 separate 32-bit words, so there is plenty of room for expansion again.
5246 There is no change in the user interface or the logging behaviour.
5248 (b) When building, for example, log lines, the code previously used a
5249 macro that called string_cat() twice, in order to add two strings. This is
5250 not really sufficiently general. Furthermore, there was one instance where
5251 it was actually wrong because one of the argument was used twice, and in
5252 one call a function was used. (As it happened, calling the function twice
5253 did not affect the overall behaviour.) The macro has been replaced by a
5254 function that can join an arbitrary number of extra strings onto a growing
5257 (c) The code for expansion conditions now uses a table and a binary chop
5258 instead of a serial search (which was left over from when there were very
5259 few conditions). Also, it now recognizes conditions like "pam" even when
5260 the relevant support is not compiled in: a suitably worded error message is
5261 given if an attempt is made to use such a condition.
5263 11. Added ${time_interval:xxxxx}.
5265 12. A bug was causing one of the ddress fields not to be passed back correctly
5266 from remote delivery subprocesses. The field in question was not being
5267 subsequently used, so this caused to problems in practice.
5269 13. Added new log selectors queue_time and deliver_time.
5271 14. Might have fixed a bug in maildirsizefile handling that threw up
5272 "unexpected character" debug warnings, and recalculated the data
5273 unnecessarily. In any case, I expanded the warning message to give more
5276 15. Added the message "Restricted characters in address" to the statements in
5277 the default ACL that block characters like @ and % in local parts.
5279 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5280 Three changes have been made:
5282 (a) There was a serious bug; a negative response to MAIL caused the whole
5283 recipient domain to be cached as invalid, thereby blocking all messages
5284 to all local parts at the same domain, from all senders. This bug has
5285 been fixed. The domain is no longer cached after a negative response to
5286 MAIL if the sender used is not empty.
5288 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5291 (c) A new callout option, "use_sender" has been added for people who want
5292 the modified behaviour.
5298 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5301 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5302 indeed breaks things for older releases.
5304 3. Added additional logging to the case where there is a problem reading data
5305 from a filter that is running in a subprocess using a pipe, in order to
5306 try to track down a specific problem.
5308 4. Testing facility fudge: when running in the test harness and attempting
5309 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5310 getting "No route to host". Convert this to a timeout.
5312 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5315 6. Some OS don't have socklen_t but use size_t instead. This affects the
5316 fifth argument of getsockopt() amongst other things. This is now
5317 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5318 can be set for individual OS. I have set it for SunOS5, OSF1, and
5319 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5320 some earlier ones do not.
5322 7. Change 4.30/15 was not doing the test caselessly.
5324 8. The standard form for an IPv6 address literal was being rejected by address
5325 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5326 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5327 this, as well as the form without the "IPv6" on the front (but only when
5328 address literals are enabled, of course).
5330 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5332 10. Exim crashed if a message with an empty sender address specified by -f
5333 encountered a router with an errors_to setting. This could be provoked only
5334 by a command such as
5338 where an empty string was supplied; "<>" did not hit this bug.
5340 11. Installed PCRE release 4.5.
5342 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5343 remained set. It is now erased.
5345 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5346 times from message ids (which are base 36 rather than the normal 62).
5348 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5349 were being counted as actual protocol errors, and logged if the log
5350 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5351 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5352 and DATA following a set of rejected RCPTs do not count as protocol errors.
5353 In other words, Exim assumes they were pipelined, though this may not
5354 actually be the case. Of course, in all cases the client gets an
5355 appropriate error code.
5357 15. If a lookup fails in an ACL condition, a message about the failure may
5358 be available; it is used if testing the ACL cannot continue, because most
5359 such messages specify what the cause of the deferral is. However, some
5360 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5361 that caused an old message to be retained and used if a later statement
5362 caused a defer, replacing the real cause of the deferral.
5364 16. If an IP address had so many PTR records that the DNS lookup buffer
5365 was not large enough to hold them, Exim could crash while trying to process
5366 the truncated data. It now detects and logs this case.
5368 17. Further to 4.21/58, another change has been made: if (and only if) the
5369 first line of a message (the first header line) ends with CRLF, a bare LF
5370 in a subsequent header line has a space inserted after it, so as not to
5371 terminate the header.
5373 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5374 unnecessarily, used atoi() instead of strtol(), and didn't check the
5375 termination when getting file sizes from file names by regex.
5377 19. Completely re-implemented the support for maildirsize files, in the light
5378 of a number of problems with the previous contributed implementation
5379 (4.30/29). In particular:
5381 . If the quota is zero, the maildirsize file is maintained, but no quota is
5384 . If the maildir directory does not exist, it is created before any attempt
5385 to write a maildirsize file.
5387 . The quota value in the file is just a cache; if the quota is changed in
5388 the transport, the new value overrides.
5390 . A regular expression is available for excluding directories from the
5393 20. The autoreply transport checks the characters in options that define the
5394 message's headers; it allows continued headers, but it was checking with
5395 isspace() after an embedded newline instead of explicitly looking for a
5398 21. If all the "regular" hosts to which an address was routed had passed their
5399 expiry times, and had not reached their retry times, the address was
5400 bounced, even if fallback hosts were defined. Now Exim should go on to try
5403 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5404 equivalent code in the SMTP transport. Some hosts send humungous responses
5405 to HELO/EHLO, more than 1024 it seems.
5407 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5408 gives compiler warnings in some environments. I've now done it "properly",
5411 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5412 (because of problems with the built-in one) was declared to return uschar *
5413 instead of char *, causing compiler failure.
5415 25. Fixed a file descriptor leak when processing alias/forward files.
5417 26. Fixed a minor format string issue in dbfn.c.
5419 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5421 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5422 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5425 29. When a sender address is verified, it is cached, to save repeating the test
5426 when there is more than one recipient in a message. However, when the
5427 verification involves a callout, it is possible for different callout
5428 options to be set for different recipients. It is too complicated to keep
5429 track of this in the cache, so now Exim always runs a verification when a
5430 callout is required, relying on the callout cache for the optimization.
5431 The overhead is duplication of the address routing, but this should not be
5434 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5435 to be verified with callout=postmaster, and the main callout worked but the
5436 postmaster check failed, the verification correctly failed. However, if a
5437 subsequent RCPT command asked for sender verification *without* the
5438 postmaster check, incorrect caching caused this verification also to fail,
5441 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5442 it was not caching the DNS options (qualify_single, search_parents) that
5443 were used when the lookup failed. A subsequent lookup with different
5444 options therefore always gave the same answer, though there were cases
5445 where it should not have. (Example: a "domains = !$mx_any" option on a
5446 dnslookup router: the "domains" option is always processed without any
5447 widening, but the router might have qualify_single set.) Now Exim uses the
5448 cached value only when the same options are set.
5450 32. Added John Jetmore's "exipick" utility to the distribution.
5452 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5453 than a timeout (e.g. a certificate is required, and is not provided), an
5454 Exim server now closes the connection immediately. Previously it waited for
5455 the client to close - but if the client is SSL, it seems that they each
5456 wait for each other, leading to a delay before one of them times out.
5458 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5459 maintained 0.8.x compatibility because I don't think many are using it, and
5460 it is clearly obsolete.
5462 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5465 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5466 client certificate was expired. A simple patch fixes this, though I don't
5467 understand the full logic of why the verify callback is called multiple
5470 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5471 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5472 which causes problems with some clients (such as the Certicom SSL Plus
5473 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5474 disables the coutermeasure allowing Eudora to connect."
5476 38. Exim was not checking that a write() to a log file succeeded. This could
5477 lead to Bad Things if a log got too big, in particular if it hit a file
5478 size limit. Exim now panics and dies if it cannot write to a log file, just
5479 as it does if it cannot open a log file.
5481 39. Modified OS/Makefile-Linux so that it now contains
5483 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5485 The two -D definitions ensure that Exim is compiled with large file
5486 support, which makes it possible to handle log files that are bigger than
5489 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5490 instance) a domain was checked against a named list that involved a lookup,
5491 causing $domain_data to be set, then another domain was checked against the
5492 same list, then the first domain was re-checked, the value of $domain_data
5493 after the final check could be wrong. In particular, if the second check
5494 failed, it could be set empty. This bug probably also applied to
5497 41. The strip_trailing_dot option was not being applied to the address given
5498 with the -f command-line option.
5500 42. The code for reading a message's header from the spool was incrementing
5501 $received_count, but never initializing it. This meant that the value was
5502 incorrect (doubled) while delivering a message in the same process in which
5503 it was received. In the most common configuration of Exim, this never
5504 happens - a fresh exec is done - but it can happen when
5505 deliver_drop_privilege is set.
5507 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5508 it now includes up to 150 characters of the unexpected data in the log
5511 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5512 and building data strings. The size of both of these buffers was 10 000
5513 bytes - far larger than anybody would *ever* want, thought I. Needless to
5514 say, somebody hit the limit. I have increased the maximum line length to
5515 20 000 and the maximum data length of concatenated lines to 100 000. I have
5516 also fixed two bugs, because there was no checking on these buffers. Tsk,
5517 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5518 buffer is too small.
5520 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5521 lsearch lookups. Now it does.
5523 46. When parsing a route_list item in a manualroute router, a fixed-length
5524 buffer was used for the list of hosts. I made this 1024 bytes long,
5525 thinking that nobody would ever have a list of hosts that long. Wrong.
5526 Somebody had a whole pile of complicated expansion conditions, and the
5527 string was silently truncated, leading to an expansion error. It turns out
5528 that it is easier to change to an unlimited length (owing to other changes
5529 that have happened since this code was originally written) than to build
5530 structure for giving a limitation error. The length of the item that
5531 expands into the list of hosts is now unlimited.
5533 47. The lsearch lookup could not handle data where the length of text line was
5534 more than 4095 characters. Such lines were truncated, leading to shortened
5535 data being returned. It should now handle lines of any length.
5537 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5538 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5541 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5542 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5543 no longer happens in comment lines. A list of replacements is now placed
5544 at the head of all of the source files, except those whose only change is
5545 to replace PERL_COMMAND in the very first #! line.
5547 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5548 messages on the queue, with a bottom-up merge sort, using code contributed
5549 by Michael Haardt. This should make operations like -bp somewhat faster on
5550 large queues. It won't affect queue runners, except when queue_run_in_order
5553 51. Installed eximstats 1.31 in the distribution.
5555 52. Added support for SRV lookups to the dnslookup router.
5557 53. If an ACL referred to $message_body or $message_body_end, the value was not
5558 reset for any messages that followed in the same SMTP session.
5560 54. The store-handling optimization for building very long strings was not
5561 differentiating between the different store pools. I don't think this
5562 actually made any difference in practice, but I've tidied it.
5564 55. While running the routers to verify a sender address, $sender_address
5565 was still set to the sender address. This is wrong, because when routing to
5566 send a bounce to the sender, it would be empty. Therefore, I have changed
5567 it so that, while verifying a sender address, $sender_address is set to <>.
5568 (There is no change to what happens when verifying a recipient address.)
5570 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5571 target A or AAAA records (if not already returned) without resetting the
5572 qualify_single or search_parents options of the DNS resolver. These are
5573 inappropriate in this case because the targets of MX and SRV records must
5574 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5575 target that, when qualified, matched something in the local domain. These
5576 two options are now turned off when doing these lookups.
5578 57. It seems that at least some releases of Reiserfs (which does not have the
5579 concept of a fixed number of inodes) returns zero and not -1 for the
5580 number of available inodes. This interacted badly with check_spool_inodes,
5581 which assumed that -1 was the "no such thing" setting. What I have done is
5582 to check that the total number of inodes is greater than zero before doing
5583 the test of how many are available.
5585 58. When a "warn" ACL statement has a log_message modifier, the message is
5586 remembered, and not repeated. This is to avoid a lot of repetition when a
5587 message has many recipients that cause the same warning to be written.
5588 Howewer, Exim was preserving the list of already written lines for an
5589 entire SMTP session, which doesn't seem right. The memory is now reset if a
5590 new message is started.
5592 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5593 debugging output unless log_rewrite was also set.
5595 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5596 of (int)(handle) when we know that handle contains (void *)(-1).
5598 61. The Exim daemon panic-logs an error return when it closes the incoming
5599 connection. However "connection reset by peer" seems to be common, and
5600 isn't really an error worthy of noting specially, so that particular error
5603 62. When Exim is trying to find all the local interfaces, it used to panic and
5604 die if the ioctl to get the interface flags failed. However, it seems that
5605 on at least one OS (Solaris 9) it is possible to have an interface that is
5606 included in the list of interfaces, but for which you get a failure error
5607 for this call. This happens when the interface is not "plumbed" into a
5608 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5609 failure of the "get flags" call assumes that the interface is down.
5611 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5612 makes life easier for people who are doing arithmetic on fields extracted
5613 from dates, where you often get leading zeros that should not be
5614 interpreted as octal.
5616 64. Added qualify_domain to the redirect router, to override the global
5619 65. If a pathologically long header line contained very many addresses (the
5620 report of this problem mentioned 10 000) and each of them was rewritten,
5621 Exim could use up a very large amount of memory. (It kept on making new
5622 copies of the header line as it rewrote, and never released the old ones.)
5623 At the expense of a bit more processing, the header rewriting function has
5624 been changed so that it no longer eats memory in this way.
5626 66. The generation of the Received: header has been moved from the time that a
5627 message starts to be received, to the time that it finishes. The timestamp
5628 in the Received: header should now be very close to that of the <= log
5629 line. There are two side-effects of this change:
5631 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5632 logged header lines no longer include the local Received: line, because
5633 it has not yet been created. The same applies to a copy of the message
5634 that is returned to a non-SMTP sender when a message is rejected.
5636 (b) When a filter file is tested using -bf, no additional Received: header
5637 is added to the test message. After some thought, I decided that this
5640 This change does not affect the value of $received_for. It is still set
5641 after address rewriting, but before local_scan() is called.
5643 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5645 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5646 gave an unhelpful panic error message, and a defer error. I have managed to
5647 change this behaviour so that it now rejects any supplied certificate,
5648 which seems right, as the list of acceptable certificates is empty.
5650 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5651 gave an unhelpful defer error. I have not managed to make this reject any
5652 supplied certificates, but the error message it gives is "no certificate
5653 supplied", which is not helpful.
5655 70. exigrep's output now also includes lines that are not associated with any
5656 message, but which match the given pattern. Implemented by a patch from
5657 Martin Sluka, which also tidied up the Perl a bit.
5659 71. Recipient callout verification, like sender verification, was using <> in
5660 the MAIL FROM command. This isn't really the right thing, since the actual
5661 sender may affect whether the remote host accepts the recipient or not. I
5662 have changed it to use the actual sender in the callout; this means that
5663 the cache record is now keyed on a recipient/sender pair, not just the
5664 recipient address. There doesn't seem to be a real danger of callout loops,
5665 since a callout by the remote host to check the sender would use <>.
5666 [SEE ABOVE: changed after hitting problems.]
5668 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5669 temporary errors. However, in the case of such a code being given after
5670 the end of a data transmission (i.e. after ".") Exim was failing to write
5671 a retry record for the message. (Yes, there was some broken host that was
5672 actually sending 8xx at this point.)
5674 73. An unknown lookup type in a host list could cause Exim to panic-die when
5675 the list was checked. (An example that provoked this was putting <; in the
5676 middle of a list instead of at the start.) If this happened during a DATA
5677 ACL check, a -D file could be left lying around. This kind of configuration
5678 error no longer causes Exim to die; instead it causes a defer errror. The
5679 incident is still logged to the main and panic logs.
5681 74. Buglet left over from Exim 3 conversion. The message "too many messages
5682 in one connection" was written to the rejectlog but not the mainlog, except
5683 when address rewriting (yes!) was being logged.
5685 75. Added write_rejectlog option.
5687 76. When a system filter was run not as root (that is, when system_filter_user
5688 was set), the values of the $n variables were not being returned to the
5689 main process; thus, they were not subsequently available in the $sn
5692 77. Added +return_path_on_delivery log selector.
5694 78. A connection timeout was being treated differently from recipients deferred
5695 when testing hosts_max_try with a message that was older than the host's
5696 retry timeout. (The host should not be counted, thus allowing all hosts to
5697 be tried at least once before bouncing.) This may have been the cause of an
5698 occasionally reported bug whereby a message would remain on the queue
5699 longer than the retry timeout, but would be bounced if a delivery was
5700 forced. I say "may" because I never totally pinned down the problem;
5701 setting up timeout/retry tests is difficult. See also the next item.
5703 79. The ultimate address timeout was not being applied to errors that involved
5704 a combination of host plus message (for example, a timeout on a MAIL
5705 command). When an address resolved to a number of possible hosts, and they
5706 were not all tried for each delivery (e.g. because of hosts_max_try), a
5707 message could remain on the queue longer than the retry timeout.
5709 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5712 81. Fixed an obscure SMTP outgoing bug which required at least the following
5713 conditions: (a) there was another message waiting for the same server;
5714 (b) the server returned 5xx to all RCPT commands in the first message so
5715 that the message was not completed; (c) the server dropped the connection
5716 or gave a negative response to the RSET that Exim sends to abort the
5717 transaction. The observed case was a dropped connection after DATA that had
5718 been sent in pipelining mode. That is, the server had advertised PIPELINING
5719 but was not implementing it correctly. The effect of the bug was incorrect
5720 behaviour, such as trying another host, and this could lead to a crash.
5726 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5727 and daemon.c were passed as pointers to ints; they should have been
5728 pointers to socklen_t variables (which are typically unsigned ints).
5730 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5733 3. Fixed a really odd bug that affected only the testing scheme; patching a
5734 certain fixed string in the binary changed the value of another string that
5735 happened to be identical to the end of the original first string.
5737 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5738 name", it returns that address as the IP address. On some operating
5739 systems (e.g. Solaris), it also passes back the IP address string as the
5740 "host name". However, on others (e.g. Linux), it passes back an empty
5741 string. Exim wasn't checking for this, and was changing the host name to an
5742 empty string, assuming it had been canonicized.
5744 5. Although rare, it is permitted to have more than one PTR record for a given
5745 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5746 all the names associated with an address, because they do in Solaris.
5747 However, it seems that they do not in Linux for data that comes from the
5748 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5749 I found this out when I moved to a new Linux workstation and tried to run
5750 the Exim test suite.
5752 To get round this problem I have changed the code so that it now does its
5753 own call to the DNS to look up PTR records when searching for a host name.
5754 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5755 addresses that are only in /etc/hosts are still found.
5757 This behaviour is, however, controlled by an option called host_lookup_
5758 order, which defaults to "bydns:byaddr". If people want to use the other
5759 order, or indeed, just use one or the other means of lookup, they can
5760 specify it in this variable.
5762 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5763 some operating systems, this comes back from gethostbyaddr() as an empty
5764 string, and this is what Exim used to test for. However, it seems that in
5765 other systems, "." is yielded. Exim now tests for this case too.
5767 7. The values of check_spool_space and check_log_space are now held internally
5768 as a number of kilobytes instead of an absolute number of bytes. If a
5769 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5770 kilobyte. This means that much larger values can be stored.
5772 8. Exim monitor: an attempt to get the action menu when not actually pointing
5773 at a message produces an empty menu entitled "No message selected". This
5774 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5775 no entries in it ("Shell widget menu has zero width and/or height"). So I
5776 have added a single, blank menu entry in this case.
5778 9. Added ${quote_local_part.
5780 10. MIME decoding is now applied to the contents of Subject: header lines when
5783 11. Now that a reference to $sender_host_address automatically causes a reverse
5784 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5785 host lookup before query-style lookups in lists that might use this
5786 variable. This has therefore been abolished, and the "net-" prefix is no
5787 longer necessary for query-style lookups.
5789 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5790 have been a typo for LFLAGS, so it has been changed.
5792 13. The install script calls Exim with "-C /dev/null" in order to find the
5793 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5794 to be output. Howeve, since Exim outputs its version number before the
5795 error, it didn't break the script. It just looked ugly. I fixed this by
5796 always allowing "-C /dev/null" if the caller is root.
5798 14. Ignore overlarge ACL variable number when reading spool file - insurance
5799 against a later release with more variables having written the file.
5801 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5802 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5803 this, as well as the form without the "IPv6" on the front.
5805 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5806 OS/Makefile-Darwin file.
5808 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5809 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5811 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5812 variable. However, some OS use ints for inodes. I've added cast to long int
5813 to get rid of the compiler warning.
5815 19. I had forgotten to lock out "/../" in configuration file names when
5816 ALT_CONFIG_PREFIX was set.
5818 20. Routers used for verification do not need to specify transports. However,
5819 if such a router generated a host list, and callout was configured, Exim
5820 crashed, because it could not find a port number from the (non-existent)
5821 transport. It now assumes port 25 in this circumstance.
5823 21. Added the -t option to exigrep.
5825 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5826 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5827 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5828 them is set, LOOKUP_LSEARCH is forced.
5830 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5832 24. Added sender and host information to the "rejected by local_scan()" log
5833 line; previously there was no indication of these.
5835 25. Added .include_if_exists.
5837 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5838 Linux. It turns out that not all file systems support this. Apparently some
5839 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5840 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5841 not supported on the file descriptor, is now ignored when Exim is trying to
5842 sync a directory. This applies only to Linux.
5844 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5846 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5847 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5850 29. Added support for maildirsize files from supplied patch (modified a bit).
5852 30. The use of :fail: followed by an empty string could lead Exim to respond to
5853 sender verification failures with (e.g.):
5855 550 Verification failed for <xxx>
5856 550 Sender verify failed
5858 where the first response line was missing the '-' that indicates it is not
5859 the final line of the response.
5861 31. The loop for finding the name of the user that called Exim had a hardwired
5862 limit of 10; it now uses the value of finduser_retries, which is used for
5863 all other user lookups.
5865 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5868 33. Exim was neglecting to zero errno before one call of strtol() when
5869 expanding a string and expecting an integer value. On some systems this
5870 resulted in spurious "integer overflow" errors. Also, it was casting the
5871 result into an int without checking.
5873 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5874 did not work. The code looks as if it has *never* worked, though it appears
5875 to have been documented since at least releast 1.62. I have made it work.
5877 35. The "timeout_DNS" error in retry rules, also documented since at least
5878 1.62, also never worked. As it isn't clear exactly what this means, and
5879 clearly it isn't a major issue, I have abolished the feature by treating it
5880 as "timeout", and writing a warning to the main and panic logs.
5882 36. The display of retry rules for -brt wasn't always showing the error code
5885 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5886 timeout_connect_A, timeout_connect_MX.
5888 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5889 to the empty sender.
5891 39. The daemon was not analysing the content of -oX till after it had closed
5892 stderr and disconnected from the controlling terminal. This meant that any
5893 syntax errors were only noted on the panic log, and the return code from
5894 the command was 0. By re-arranging the code a little, I've made the
5895 decoding happen first, so such errors now appear on stderr, and the return
5896 code is 1. However, the actual setting up of the sockets still happens in
5897 the disconnected process, so errors there are still only recorded on the
5900 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5901 connections (as happens on some IP stacks) was logged at start up time as
5902 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5903 it from "IPv6 and IPv4", which means that two separate sockets are being
5906 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5907 says whether AF_INET or AF_INET6 was passed as an argument.
5909 42. Exiwhat output was messed up when time zones were included in log
5912 43. Exiwhat now gives more information about the daemon's listening ports,
5913 and whether -tls-on-connect was used.
5915 44. The "port" option of the smtp transport is now expanded.
5917 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5918 silently ignored. Now an error message is written to the main and panic
5921 46. There's a new ACL modifier called "logwrite" which writes to a log file
5922 as soon as it is encountered.
5924 47. Added $local_user_uid and $local_user_gid at routing time.
5926 48. Exim crashed when trying to verify a sender address that was being
5929 49. Exim was recognizing only a space character after ".include". It now also
5930 recognizes a tab character.
5932 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5933 extracting the relevant information from the specification. The man page no
5934 longer contains scrambled data for the -d option, and I've added a section
5935 at the front about calling Exim under different names.
5937 51. Added "extra_headers" argument to the "mail" command in filter files.
5939 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5942 53. Installed eximstats 1.29.
5944 54. Added transport_filter_timeout as a generic transport option.
5946 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5947 Cc: header lines. This was required by RFC 822, but it not required by RFC
5950 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5951 incoming messages that did not have them. Now it does so only if the
5952 message originates locally, that is, if there is no associated remote host
5953 address. When Resent- header lines are present, this applies to the Resent-
5954 lines rather than the non-Resent- lines.
5956 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5957 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5959 58. Messages for configuration errors now include the name of the main
5960 configuration file - useful now that there may be more than one file in a
5961 list (.included file names were always shown).
5963 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5964 for those rare installations that do not start the daemon as root or run it
5965 setuid root. I've cut out the call to initgroups() if the daemon is not
5968 60. The Exim user and group can now be bound into the binary as text strings
5969 that are looked up at the start of Exim's processing.
5971 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5973 62. Added $mailstore_basename variable.
5975 63. Installed patch to sieve.c from Michael Haardt.
5977 64. When Exim failed to open the panic log after failing to open the main log,
5978 the original message it was trying to log was written to stderr and debug
5979 output, but if they were not available (the usual case in production), it
5980 was lost. Now it is written to syslog before the two lines that record the
5981 failures to open the logs.
5983 65. Users' Exim filters run in subprocesses under the user's uid. It is
5984 possible for a "deliver" command or an alias in a "personal" command to
5985 provoke an address rewrite. If logging of address rewriting is configured,
5986 this fails because the process is not running as root or exim. There may be
5987 a better way of dealing with this, but for the moment (because 4.30 needs
5988 to be released), I have disabled address rewrite logging when running a
5989 filter in a non-root, non-exim process.
5995 1. The buildconfig auxiliary program wasn't quoting the value set for
5996 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5997 not defined. This bug was masked in 4.22 by the effect that was fixed in
6000 2. Some messages that were rejected after a message id was allocated were
6001 shown as "incomplete" by exigrep. It no longer does this for messages that
6002 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6004 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6005 have allow_domain_literals set, the ID did not get logged in the <= line.
6006 Domain literals are now always recognized in Message-ID: header lines.
6008 4. The first argument for a ${extract expansion item is the key name or field
6009 number. Leading and trailing spaces in this item were not being ignored,
6010 causing some misleading effects.
6012 5. When deliver_drop_privilege was set, single queue runner processes started
6013 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6014 same command in the process it spins off) were not dropping privilege.
6016 6. When the daemon running as "exim" started a queue runner, it always
6017 re-executed Exim in the spun-off process. This is a waste of effort when
6018 deliver_drop_privilege is set. The new process now just calls the
6019 queue-runner function directly.
6025 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6028 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6029 ignored. Though the use of -oP was forcing the writing of a pid file, it
6030 was always written to the default place.
6032 3. If the message "no IP address found for host xxxx" is generated during
6033 incoming verification, it is now followed by identification of the incoming
6034 connection (so you can more easily find what provoked it).
6036 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6038 5. Added some features to "harden" Exim a bit more against certain attacks:
6040 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6041 be put in Local/Makefile. This is like the never_users runtime option,
6042 but it cannot be overridden. The default setting is "root".
6044 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6045 prefix string with which any file named in a -C command line option
6048 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6049 is retained for -C and -D only if the caller of Exim is root. Without
6050 it, the exim user may also use -C and -D and retain privilege.
6052 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6053 command line option is disabled.
6055 6. Macro names set by the -D option must start with an upper case letter, just
6056 like macro names defined in the configuration file.
6058 7. Added "dereference=" facility to LDAP.
6060 8. Two instances of the typo "uknown" in the source files are fixed.
6062 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6063 the Configure-Makefile script screwed up while processing it.
6065 10. Incorporated PCRE 4.4.
6067 11. The SMTP synchronization check was not operating right at the start of an
6068 SMTP session. For example, it could not catch a HELO sent before the client
6069 waited for the greeting. There is now a check for outstanding input at the
6070 point when the greeting is written. Because of the duplex, asynchronous
6071 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6072 way, but not yet received, when the check is performed.
6074 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6075 on TCP/IP sockets, because this apparently causes some broken clients to
6078 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6079 unchanged) from the Cygwin maintainer.
6081 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6082 was supported instead of testing for mbx. Effectively a typo.
6084 15. The spa authenticator server code was not checking that the input it
6085 received was valid base64.
6087 16. The debug output line for the "set" modifier in ACLs was not showing the
6088 name of the variable that was being set.
6090 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6092 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6093 lookup on its own. Something else was needed to trigger the lookup. For
6094 example, a match in host_lookup or the need for a host name in a host list.
6095 Now, if $sender_host_name is referenced and the host name has not yet been
6096 looked up, a lookup is performed. If the lookup fails, the variable remains
6097 empty, and $host_lookup_failed is set to "1".
6099 19. Added "eqi" as a case-independent comparison operator.
6101 20. The saslauthd authentication condition could segfault if neither service
6102 nor realm was specified.
6104 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6105 error message that was logged was misleading, and incoming SMTP
6106 connections were dropped. The message is now more accurate, and temporary
6107 errors are given to SMTP connections.
6109 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6110 (except RSET) with a 421 error, until QUIT is received. However, it was
6111 failing to send a response to QUIT.
6113 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6114 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6115 ACL is now run after the helo_try_verify_hosts code.
6117 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6118 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6119 case-independent, so other case variants are also recognized). Apparently
6120 some systems use these upper case variants.
6122 25. If more than two messages were waiting for the same host, and a transport
6123 filter was specified for the transport, Exim sent two messages over the
6124 same TCP/IP connection, and then failed with "socket operation on non-
6125 socket" when it tried to send the third.
6127 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6129 27. The extern definition of crypt16() in expand.c was not being excluded when
6130 the OS had its own crypt16() function.
6132 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6133 as a preferred synonym for return_size_limit, both as an option and as an
6136 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6138 30. Changed the default configuration ACL to relax the local part checking rule
6139 for addresses that are not in any local domains. For these addresses,
6140 slashes and pipe symbols are allowed within local parts, but the sequence
6141 /../ is explicitly forbidden.
6143 31. SPA server authentication was not clearing the challenge buffer before
6146 32. log_message in a "warn" ACL statement was writing to the reject log as
6147 well as to the main log, which contradicts the documentation and doesn't
6148 seem right (because no rejection is happening). So I have stopped it.
6150 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6151 However, I am unable to do any testing of this.
6153 34. Fixed an infelicity in the appendfile transport. When checking directories
6154 for a mailbox, to see if any needed to be created, it was accidentally
6155 using path names with one or more superfluous leading slashes; tracing
6156 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6158 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6159 contents are added to the log line that is written for every discarded
6160 recipient. (Previously a log_message setting was ignored.)
6162 36. The ${quote: operator now quotes the string if it is empty.
6164 37. The install script runs exim in order to find its version number. If for
6165 some reason other than non-existence or emptiness, which it checks, it
6166 could not run './exim', it was installing it with an empty version number,
6167 i.e. as "exim-". This error state is now caught, and the installation is
6170 38. An argument was missing from the function that creates an error message
6171 when Exim fails to connect to the socket for saslauthd authentication.
6172 This could cause Exim to crash, or give a corrupted message.
6174 39. Added isip, isip4, and isip6 to ${if conditions.
6176 40. The ACL variables $acl_xx are now saved with the message, and can be
6177 accessed later in routers, transports, and filters.
6179 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6180 strings in the file are not string-expanded.
6182 42. If a MAIL command specified a SIZE value that was too large to fit into an
6183 int variable, the check against message_size_limit failed. Such values are
6184 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6185 day this will have to be increased, but I don't think I want to be around
6186 when emails are that large.
6193 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6194 iconv() is not standard in FreeBSD.
6196 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6197 IPv6 enabled. The observed symptom was a segmentation fault on return from
6198 the function os_common_find_running_interfaces() in src/os.c.
6200 3. In the check_special_case() function in daemon.c I had used "errno" as an
6201 argument name, which causes warnings on some systems. This was basically a
6202 typo, since it was named "eno" in the comments!
6204 4. The code that waits for the clock to tick (at a resolution of some fraction
6205 of a second) so as to ensure message-id uniqueness was always waiting for
6206 at least one whole tick, when it could have waited for less. [This is
6207 almost certainly not relevant at current processor speeds, where it is
6208 unlikely to ever wait at all. But we try to future-proof.]
6210 5. The function that sleeps for a time interval that includes fractions of a
6211 second contained a race. It did not block SIGALRM between setting the
6212 timer, and suspending (a couple of lines later). If the interval was short
6213 and the sigsuspend() was delayed until after it had expired, the suspension
6214 never ended. On busy systems this could lead to processes getting stuck for
6217 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6218 process, before it forks any delivery processes. The open lookup caching
6219 mechanism meant that the open file or database connection was passed into
6220 the delivery process. The problem was that delivery processes always tidy
6221 up cached lookup data. This could cause a problem for the next delivery
6222 process started by the queue runner, because the external queue runner
6223 process does not know about the closure. So the next delivery process
6224 still has data in the lookup cache. In the case of a file lookup, there was
6225 no problem because closing a file descriptor in a subprocess doesn't affect
6226 the parent. However, if the lookup was caching a connection to a database,
6227 the connection was closed, and the second delivery process was likely to
6228 see errors such as "PGSQL: query failed: server closed the connection
6229 unexpectedly". The problem has been fixed by closing all cached lookups
6230 in a queue runner before running a delivery process.
6232 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6233 seem to have the "const" qualifier which it has on other OS. I've
6236 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6237 *of the same type* (client or server) with the same public name that an
6238 error should be diagnosed.
6240 9. When Exim looked up a host name for an IP address, but failed to find the
6241 original IP address when looking up the host name (a safety check), it
6242 output the message "<ip address> does not match any IP for NULL", which was
6243 confusing, to say the least. The bug was that the host name should have
6244 appeared instead of "NULL".
6246 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6247 user that is built into the binary, and the -C or -D options is used, root
6248 privilege is dropped before the configuration file is read. In addition,
6249 logging is switched to stderr instead of the normal log files. If the
6250 configuration then re-defines the Exim user, the unprivileged environment
6251 is probably not what is expected, so Exim logs a panic warning message (but
6254 However, if deliver_drop_privilege is set, the unprivileged state may well
6255 be exactly what is intended, so the warning has been cut out in that case,
6256 and Exim is allowed to try to write to its normal log files.
6262 1. smtp_return_error_details was not giving details for temporary sender
6263 or receiver verification errors.
6265 2. Diagnose a configuration error if two authenticators have the same public
6268 3. Exim used not to create the message log file for a message until the first
6269 delivery attempt. This could be confusing when incoming messages were held
6270 for policy or load reasons. The message log file is now created at the time
6271 the message is received, and an initial "Received" line is written to it.
6273 4. The automatically generated man page for command line options had a minor
6274 bug that caused no ill effects; however, a more serious problem was that
6275 the procedure for building the man page automatically didn't always
6276 operate. Consequently, release 4.20 contains an out-of-date version. This
6277 shouldn't happen again.
6279 5. When building Exim with embedded Perl support, the script that builds the
6280 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6281 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6283 6. The freeze_tell option was not being used for messages that were frozen on
6284 arrival, either by an ACL or by local_scan().
6286 7. Added the smtp_incomplete_transaction log selector.
6288 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6289 was accepting AUTH without a new EHLO.
6291 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6292 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6295 10. Logging of TCP/IP connections (when configured) now happens in the main
6296 daemon process instead of the child process, so that the TCP/IP connection
6297 count is more accurate (but it can never be perfect).
6299 11. The use of "drop" in a nested ACL was not being handled correctly in the
6300 outer ACL. Now, if condition failure induced by the nested "drop" causes
6301 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6302 or "require"), the connection is dropped.
6304 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6305 that yield "discard" can now be used with an "accept" or a "discard" verb,
6306 but an error is generated for any others (because I can't see a useful way
6307 to define what should happen).
6309 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6310 are now processed in the same way as lines in the Exim configuration file.
6311 In particular, continuation lines are supported.
6313 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6315 15. Added -ti meaning -t -i.
6317 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6318 domains, and warn by logging if others are found.
6320 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
6321 returned from GIFCONF when Exim is trying to find the list of interfaces on
6322 a host. The code in os.c has been modified to copy each ifreq to an aligned
6323 structure in all cases.
6325 Also, in some cases, the returned ifreq's were being copied to a 'struct
6326 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6327 means the last couple of bytes of an IPv6 address could be chopped if the
6328 ifreq contained only a normal sockaddr (14 bytes storage).
6330 18. Named domain lists were not supported in the hosts_treat_as_local option.
6331 An entry such as +xxxx was not recognized, and was treated as a literal
6334 19. Ensure that header lines added by a DATA ACL are included in the reject log
6335 if the ACL subsequently rejects the message.
6337 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6338 MD5 (which is deprecated).
6340 21. When testing a filter file using -bf, Exim was writing a message when it
6341 took the sender from a "From " line in the message, but it was not doing so
6342 when it took $return_path from a Return-Path: header line. It now does.
6344 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6345 with a valid header line field name (a series of printing characters
6346 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6348 23. Changed "disc" in the source to "disk" to conform to the documentation and
6349 the book and for uniformity.
6351 24. Ignore Sendmail's -Ooption=value command line item.
6353 25. When execve() failed while trying to run a command in a pipe transport,
6354 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
6355 could be confused with a return value of 69 from the command itself. This
6356 has been changed to 127, the value the shell returns if it is asked to run
6357 a non-existent command. The wording for the related log line suggests a
6358 non-existent command as the problem.
6360 26. If received_header_text expands to an empty string, do not add a Received:
6361 header line to the message. (Well, it adds a token one on the spool, but
6362 marks it "old" so that it doesn't get used or transmitted.)
6364 27. Installed eximstats 1.28 (addition of -nt option).
6366 28. There was no check for failure on the call to getsockname() in the daemon
6367 code. This can fail if there is a shortage of resources on the system, with
6368 ENOMEM, for example. A temporary error is now given on failure.
6370 29. Contrary to the C standard, it seems that in some environments, the
6371 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6372 program. Exim now does this explicitly; it affects the formatting of
6373 timestamps using strftime().
6375 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6376 complaints. I've now initialized all the variables, to avoid this.
6378 32. Header lines added by a system filter were not being "seen" during
6379 transport-time rewrites.
6381 33. The info_callback() function passed to OpenSSL is set up with type void
6382 (*)(SSL *, int, int), as described somewhere. However, when calling the
6383 function (actually a macro) that sets it up, the type void(*)() is
6384 expected. I've put in a cast to prevent warnings from picky compilers.
6386 34. If a DNS black list lookup found a CNAME record, but there were no A
6387 records associated with the domain it pointed at, Exim crashed.
6389 35. If a DNS black list lookup returned more than one A record, Exim ignored
6390 all but the first. It now scans all returned addresses if a particular IP
6391 value is being sought. In this situation, the contents of the
6392 $dnslist_value variable are a list of all the addresses, separated by a
6395 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6396 to accept a host name and all its aliases if the forward lookup for any of
6397 them yielded the IP address of the incoming connection. Now it accepts only
6398 those names whose forward lookup yields the correct IP address. Any other
6399 names are discarded. This closes a loophole whereby a rogue DNS
6400 administrator could create reverse DNS records to break through a
6401 wildcarded host restriction in an ACL.
6403 37. If a user filter or a system filter that ran in a subprocess used any of
6404 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6405 the wrong values were passed to the pipe command ($thisaddress had the
6406 value of $0, $0 had the value of $1, etc). This bug was introduced by
6407 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6409 38. Improved the line breaking for long SMTP error messages from ACLs.
6410 Previously, if there was no break point between 40 and 75 characters, Exim
6411 left the rest of the message alone. Two changes have been made: (a) I've
6412 reduced the minimum length to 35 characters; (b) if it can't find a break
6413 point between 35 and 75 characters, it looks ahead and uses the first one
6414 that it finds. This may give the occasional overlong line, but at least the
6415 remaining text gets split now.
6417 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6418 file descriptors might be low, and that setting 1000 would always raise it.
6419 It turns out that in some environments, the limit is already over 1000 and
6420 that lowering it causes trouble. So now Exim takes care not to decrease it.
6422 40. When delivering a message, the value of $return_path is set to $sender_
6423 address at the start of routing (routers may change the value). By an
6424 oversight, this default was not being set up when an address was tested by
6425 -bt or -bv, which affected the outcome if any router or filter referred to
6428 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6429 log only when "message" or "log_message" are set. However, if one of the
6430 conditions was an address verification, or a call to a nested ACL, the
6431 messages generated by the underlying test were being passed through. This
6432 no longer happens. The underlying message is available in $acl_verify_
6433 message for both "message" and "log_message" expansions, so it can be
6434 passed through if needed.
6436 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6437 new expansion $bh_ to give the encoded byte string without charset
6438 translation. Translation happens only if iconv() is available; HAVE_ICONV
6439 indicates this at build time. HEADERS_CHARSET gives the charset to
6440 translate to; headers_charset can change it in the configuration, and
6441 "headers charset" can change it in an individual filter file.
6443 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6444 that creates RFC 2047 encoded "words" labels them as that charset instead
6445 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6446 expansion operator; (ii) when Exim creates a From: line for a local
6447 message; (iii) when a header line is rewritten to include a "phrase" part.
6449 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6450 buggy, causing it to skip the first lines of messages whose message ID
6451 ended in 'D'. This would not have bitten before Exim release 4.14, because
6452 message IDs were unlikely to end in 'D' before then. The effect was to have
6453 incorrect size information for certain domains.
6455 45. #include "config.h" was missing at the start of the crypt16.c module. This
6456 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6459 46. If there was a timeout during a "random" callout check, Exim treated it as
6460 a failure of the random address, and carried on sending RSET and the real
6461 address. If the delay was just some slowness somewhere, the response to the
6462 original RCPT would be taken as a response to RSET and so on, causing
6463 mayhem of various kinds.
6465 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6466 when I implemented it. It didn't allow for the fact that some option values
6467 may legitimatetly be negative (e.g. size_addition), and it didn't even do
6468 the right test for positive values.
6470 48. Domain names in DNS records are case-independent. Exim always looks them up
6471 in lower case. Some resolvers return domain names in exactly the case they
6472 appear in the zone file, that is, they may contain uppercase letters. Not
6473 all resolvers do this - some return always lower case. Exim was treating a
6474 change of case by a resolver as a change of domain, similar to a widening
6475 of a domain abbreviation. This triggered its re-routing code and so it was
6476 trying to route what was effectively the same domain again. This normally
6477 caused routing to fail (because the router wouldn't handle the domain
6478 twice). Now Exim checks for this case specially, and just changes the
6479 casing of the domain that it ultimately uses when it transmits the message
6482 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6485 50. If a filter generated a file delivery with a non-absolute name (possible if
6486 no home directory exists for the router), the forbid_file option was not
6489 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6490 the existing equality matching.
6492 52. Exim was using ints instead of ino_t variables in some places where it was
6493 dealing with inode numbers.
6495 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6496 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6497 called TMPDIR, and if it finds it is different, it changes its value.
6499 54. The smtp_printf() function is now made available to local_scan() so
6500 additional output lines can be written before returning. There is also an
6501 smtp_fflush() function to enable the detection of a dropped connection.
6502 The variables smtp_input and smtp_batched_input are exported to
6505 55. Changed the default runtime configuration: the message "Unknown user"
6506 has been removed from the ACL, and instead placed on the localuser router,
6507 using the cannot_route_message feature. This means that any verification
6508 failures that generate their own messages won't get overridden. Similarly,
6509 the "Unrouteable address" message that was in the ACL for unverifiable
6510 relay addresses has also been removed.
6512 56. Added hosts_avoid_esmtp to the smtp transport.
6514 57. The exicyclog script was not checking for the esoteric option
6515 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6516 will work only if exicyclog is run under the appropriate euid.
6518 58. Following a discussion on the list, the rules by which Exim recognises line
6519 endings on incoming messages have been changed. The -dropcr and drop_cr
6520 options are now no-ops, retained only for backwards compatibility. The
6521 following line terminators are recognized: LF CRLF CR. However, special
6522 processing applies to CR:
6524 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6525 nor a local message in the state where . is a terminator.
6527 (ii) If a bare CR is encountered in a header line, an extra space is added
6528 after the line terminator so as not to end the header. The reasoning
6529 behind this is that bare CRs in header lines are most likely either
6530 to be mistakes, or people trying to play silly games.
6532 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6533 was being incorrectly given as 18 bytes larger than it should have been.
6534 This is a VOB (very old bug).
6536 60. This may never have affected anything current, but just in case it has:
6537 When the local host is found other than at the start of a list of hosts,
6538 the local host, those with the same MX, and any that follow, are discarded.
6539 When the list in question was part of a longer list of hosts, the following
6540 hosts (not currently being processed) were also being discarded. This no
6541 longer happens. I'm not sure if this situation could ever has previously
6544 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6547 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6548 header. This is something that is recommended in a new Internet Draft, and
6549 is something that is documented as being done by Sendmail. There are two
6550 possible values. For messages generated by the autoreply transport, Exim
6553 Auto-Submitted: auto-replied
6555 whereas for all other generated messages (e.g. bounces) it adds
6557 Auto-Submitted: auto-generated
6559 63. The "personal" condition in filters now includes a test for the
6560 Auto-Submitted: header. If it contains the string "auto-" the message it
6561 not considered personal.
6563 64. Added rcpt_include_affixes as a generic transport option.
6565 65. Added queue_only_override (default true).
6567 66. Added the syslog_duplication option.
6569 67. If what should have been the first header line of a message consisted of
6570 a space followed by a colon, Exim was mis-interpreting it as a header line.
6571 It isn't of course - it is syntactically invalid and should therefore be
6572 treated as the start of the message body. The misbehaviour could have
6573 caused a number of strange effects, including loss of data in subsequent
6574 header lines, and spool format errors.
6576 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6577 client host had authenticated. This control can now be exercised by an ACL
6578 for more flexibility.
6580 69. By default, callouts do not happen when testing with -bh. There is now a
6581 variant, -bhc, which does actually run the callout code, including
6582 consulting and updating the callout cache.
6584 70. Added support for saslauthd authentication, courtesy of Alexander
6587 71. If statvfs() failed on the spool or log directories while checking their
6588 size for availability, Exim confusingly gave the error "space shortage".
6589 Furthermore, in debugging mode it crashed with a floating point exception.
6590 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6591 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6592 serious problem, Exim now writes to the main and panic logs when this
6593 happens, with details of the failure. It then refuses to accept the
6594 incoming message, giving the message "spool directory problem" or "log
6595 directory problem" with a 421 code for SMTP messages.
6597 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6598 0, 1, and 2 exist, because some OS complain for execs without them (see
6599 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6600 descriptors. However, the code omitted to check that the open succeeded,
6601 causing mysterious errors if for some reason the permissions on /dev/null
6602 got screwed. Now Exim writes a message to the main and panic logs, and
6603 bombs out if it can't open /dev/null.
6605 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6606 interact so that it is all more flexible. It is supposed to remain
6607 backwards compatible. Also added extra_local_interfaces.
6609 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6610 to bomb out with an assertion failure - to the client this appears as a
6611 connection drop. This problem occurs in the part of the code that was taken
6612 from the Samba project. Fortunately, the assertion is in a very simple
6613 function, so I have fixed this by reproducing the function inline in the
6614 one place where it is called, and arranging for authentication to fail
6615 instead of killing the process with assert().
6617 75. The SPA client code was not working when the server requested OEM rather
6618 than Unicode encoding.
6620 76. Added code to make require_files with a specific uid setting more usable in
6621 the case where statting the file as root fails - usually a non-root-mounted
6622 NFS file system. When this happens and the failure is EACCES, Exim now
6623 forks a subprocess and does the per-uid checking as the relevant uid.
6625 77. Added process_log_path.
6627 78. If log_file_path was not explicitly set, a setting of check_log_space or
6628 check_log_inodes was ignored.
6630 79. If a space check for the spool or log partitions fails, the incident is now
6631 logged. Of course, in the latter case the data may get lost...
6633 80. Added the %p formatting code to string_format() so that it can be used to
6634 print addresses in debug_print(). Adjusted all the address printing in the
6635 debugging in store.c to use %p rather than %d.
6637 81. There was a concern that a line of code in smtp_in.c could overflow a
6638 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6639 initially expressed, the concern was not well-founded, because trailing
6640 spaces are removed early. However, if the trailing spaces were followed by
6641 a NULL, they did not get removed, so the overflow was possible. Two fixes
6644 (a) I re-wrote the offending code in a cleaner fashion.
6645 (b) If an incoming SMTP command contains a NULL character, it is rejected
6648 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6649 runs initgroups(), so that if the Exim user is in any additional groups,
6650 they will be used during message reception.
6656 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob