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.
12 JH/02 The path option on a pipe transport is now expanded before use.
17 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
18 supports it and a size is available (ie. the sending peer gave us one).
20 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
21 years of being deprecated). The replacements are the ACLs
22 acl_smtp_mime and acl_not_smtp_mime.
24 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
25 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
26 or even an in-clear connection were permitted. Now, if the host lookup
27 was dnssec and dane was requested then the host is only used if the
28 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
29 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
30 if one fails this test.
31 This means that a poorly-configured remote DNS will make it incommunicado;
32 but it protects against a DNS-interception attack on it.
34 JH/04 Bug 1810: make continued-use of an open smtp transport connection
35 non-noisy when a race steals the message being considered.
37 JH/05 If main configuration option tls_certificate is unset, generate a
38 self-signed certificate for inbound TLS connections.
40 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
41 in rewrites and routers.
43 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
44 and logged a warning sing 4.83; now they are a configuration file error.
46 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
47 (lacking @domain). Apply the same qualification processing as RCPT.
49 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
51 JH/10 Support ${sha256:} applied to a string (as well as the previous
54 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
55 a cutthrough deliver is pending, as we always want to make a connection.
56 This also avoids re-routing the message when later placing the cutthrough
57 connection after a verify cache hit.
58 Do not update it with the verify result either.
60 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
61 when routing results in more than one destination address.
63 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
64 signing (which inhibits the cutthrough capability). Previously only
65 the presence of an option was tested; now an expansion evaluating as
66 empty is permissible (obviously it should depend only on data available
67 when the cutthrough connection is made).
69 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
70 the relevant preceding SMTP command did not note the pipelining mode.
72 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
73 Previously they were not counted.
75 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
76 as one having no matching records. Previously we deferred the message
77 that needed the lookup.
79 JH/17 Fakereject: previously logged as a norml message arrival "<="; now
80 distinguished as "(=".
82 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
83 for missing MX records. Previously it only worked for missing A records.
85 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
87 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
88 after the data-go-ahead and data-ack. Patch from Jason Betts.
90 JH/21 Bug 1846: Send DMARC forensic reports for reject and quaratine results,
91 even for a "none" policy. Patch from Tony Meyer.
93 JH/22 Fix continued use of a connection for further deliveries. If a port was
94 specified by a router, it must also match for the delivery to be
97 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
98 When one of the recipients of a message was unsuitable for the connection
99 (has no matching addresses), we lost track of needing to mark it
100 deferred. As a result mail would be lost.
102 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
104 JH/25 Decoding ACL controls is now done using a binary search; the source code
105 takes up less space and should be simpler to maintain. Merge the ACL
106 condition decode tables also, with similar effect.
108 JH/26 Fix problem with one_time used on a redirect router which returned the
109 parent address unchanged. A retry would see the parent address marked as
110 delivered, so not attempt the (identical) child. As a result mail would
113 JH/27 Fix a possible security hole, wherein a process operating with the Exim
114 UID can gain a root shell. Credit to http://www.halfdog.net/ for
115 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
118 JH/28 Enable {spool,log} filesystem space and inode checks as default.
119 Main config options check_{log,spool}_{inodes,space} are now
120 100 inodes, 10MB unless set otherwise in the configuration.
122 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
123 Previously it only applied to the main-section connection policy
126 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
128 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
129 by me. Added RFC7919 DH primes as an alternative.
131 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
132 are not in the system include path.
134 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
135 GnuTLS, when a session startup failed (eg because the client disconnected)
136 Exim did stdio operations after fclose. This was exposed by a recent
137 change which nulled out the file handle after the fclose.
139 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
140 signed directly by the cert-signing cert, rather than an intermediate
141 OCSP-signing cert. This is the model used by LetsEncrypt.
143 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
145 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
146 an incoming connection.
148 HS/02 Bug 1802: Do not half-close the connection after sending a request
151 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
152 fallback to "prime256v1".
154 JH/34 SECURITY: Use proper copy of DATA command in error message.
155 Could leak key material. Remotely explaoitable. CVE-2016-9963.
160 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
161 and 3.4.4 - once the server is enabled to respond to an OCSP request
162 it does even when not requested, resulting in a stapling non-aware
163 client dropping the TLS connection.
165 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
166 support variable-length bit vectors. No functional change.
168 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
169 The I= interface field on outgoing lines is now after the H= remote
170 host field, same as incoming lines. There is a separate
171 outgoing_interface log selector which allows you to disable the
174 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
175 If not running log_selector +smtp_connection the mainlog would be held
176 open indefinitely after a "too many connections" event, including to a
177 deleted file after a log rotate. Leave the per net connection logging
178 leaving it open for efficiency as that will be quickly detected by the
179 check on the next write.
181 HS/01 Bug 1671: Fix post transport crash.
182 Processing the wait-<transport> messages could crash the delivery
183 process if the message IDs didn't exist for some reason. When
184 using 'split_spool_directory=yes' the construction of the spool
185 file name failed already, exposing the same netto behaviour.
187 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
188 mime_regex ACL conditions.
190 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
191 to DSN fail messages (bounces): remote IP, remote greeting, remote response
192 to HELO, local diagnostic string.
194 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
195 log line to debug. Even when configured with a tls authenticator many
196 client connections are expected to not authenticate in this way, so
197 an authenticate fail is not an error.
199 HS/02 Add the Exim version string to the process info. This way exiwhat
200 gives some more detail about the running daemon.
202 JH/06 Bug 1395: time-limit cacheing of DNS lookups, to the TTL value. This may
203 matter for fast-change records such as DNSBLs.
205 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
206 retry record, even if constant. There may be multiple transports with
207 different interface settings and the retry behaviour needs to be kept
210 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
212 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
214 JH/10 Bug 840: fix log_defer_output option of pipe transport
216 JH/11 Bug 830: use same host for all RCPTS of a message, even under
217 hosts_randomize. This matters a lot when combined with mua_wrapper.
219 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
220 ${quote_pgsql:<string>} operator.
222 JH/13 Bug 1708: avoid misaligned access in cached lookup.
224 JH/14 Change header file name for freeradius-client. Relevant if compiling
225 with Radius support; from the Gentoo tree and checked under Fedora.
227 JH/15 Bug 1712: Introduce $prdr_requested flag variable
229 JH/16 Bug 1714: Permit an empty string as expansion result for transport
230 option transport_filter, meaning no filtering.
232 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
234 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
235 defaults to "*" (all hosts). The variable is now available when not built
236 with TLS, default unset, mainly to enable keeping the testuite sane.
237 If a server certificate is not supplied (via tls_certificate) an error is
238 logged, and clients will find TLS connections fail on startup. Presumably
239 they will retry in-clear.
240 Packagers of Exim are strongly encouraged to create a server certificate
241 at installation time.
243 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
244 with the $config_file variable.
246 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
247 in transport context, after the attempt, and per-recipient. The latter type
248 is per host attempted. The event data is the error message, and the errno
249 information encodes the lookup type (A vs. MX) used for the (first) host,
250 and the trailing two digits of the smtp 4xx reponse.
252 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
253 to write to mainlog (or rejectlog, paniclog) in the window between file
254 creation and permissions/ownership being changed. Particularly affects
255 installations where exicyclog is run as root, rather than exim user;
256 result is that the running daemon panics and dies.
258 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
260 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
261 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
262 "pri" and "weight". Note that the previous implicit priority given by the
263 list order is no longer honoured.
265 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalisation
268 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
269 by defining SUPPORT_SOCKS.
271 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
272 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
273 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
274 variables are renamed to proxy_{local,external}_{address,port}.
276 JH/27 Move Internationalisation support from Experimental to mainline, enabled
277 for a build by defining SUPPORT_I18N
279 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
280 of the query string, and make ${quote_redis:} do that quoting.
282 JH/29 Move Events support from Experimental to mainline, enabled by default
283 and removable for a build by defining DISABLE_EVENT.
285 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
287 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
288 cached by the daemon.
290 JH/32 Move Redis support from Experimental to mainline, enabled for a build
291 by defining LOOKUP_REDIS. The libhiredis library is required.
293 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
294 keys are given for lookup.
296 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
297 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
298 only supported when built with TLS support. The PolarSSL SHA routines
299 are still used when the TLS library is too old for convenient support.
301 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
302 openssl_options), for security. OpenSSL forces this from version 1.1.0
303 server-side so match that on older versions.
305 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
306 allocation for $value could be released as the expansion processing
307 concluded, but leaving the global pointer active for it.
309 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
310 and to use the domains and local_parts ACL conditions.
312 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
313 incorrectly not doubled on cutthrough transmission, hence seen as a
314 body-termination at the receiving system - resulting in truncated mails.
315 Commonly the sender saw a TCP-level error, and retransmitted the message
316 via the normal store-and-forward channel. This could result in duplicates
317 received - but deduplicating mailstores were liable to retain only the
318 initial truncated version.
320 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
322 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
324 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
325 we're in there, support oversigning also; bug 1309.
327 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
329 HS/04 Add support for keep_environment and add_environment options.
331 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
332 either intentional arithmetic overflow during PRNG, or testing config-
335 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
336 delivery resulted in actual delivery. Cancel cutthrough before DATA
339 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
340 rejects a recipient: pass the reject to the originator.
342 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
343 Many were false-positives and ignorable, but it's worth fixing the
346 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
347 for the new environment-manipulation done at startup. Move the routines
348 from being local to tls.c to being global via the os.c file.
350 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
351 an extract embedded as result-arg for a map, the first arg for extract
352 is unavailable so we cannot tell if this is a numbered or keyed
353 extraction. Accept either.
359 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
362 JH/02 The smtp transport option "multi_domain" is now expanded.
364 JH/03 The smtp transport now requests PRDR by default, if the server offers
367 JH/04 Certificate name checking on server certificates, when exim is a client,
368 is now done by default. The transport option tls_verify_cert_hostnames
369 can be used to disable this per-host. The build option
370 EXPERIMENTAL_CERTNAMES is withdrawn.
372 JH/05 The value of the tls_verify_certificates smtp transport and main options
373 default to the word "system" to access the system default CA bundle.
374 For GnuTLS, only version 3.0.20 or later.
376 JH/06 Verification of the server certificate for a TLS connection is now tried
377 (but not required) by default. The verification status is now logged by
378 default, for both outbound TLS and client-certificate supplying inbound
381 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
384 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
385 Status Notification (bounce) messages are now MIME format per RFC 3464.
386 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
387 under the control of the dsn_advertise_hosts option, and routers may
388 have a dsn_lasthop option.
390 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
391 default, modifiable by a malware= option. The list separator for
392 the options can now be changed in the usual way. Bug 68.
394 JH/10 The smtp_receive_timeout main option is now expanded before use.
396 JH/11 The incoming_interface log option now also enables logging of the
397 local interface on delivery outgoing connections.
399 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
400 if the interface and destination host and port all match.
402 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
405 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
406 Patch from Andrew Lewis.
408 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
409 now supports optional time-restrictions, weighting, and priority
410 modifiers per server. Patch originally by <rommer@active.by>.
412 JH/16 The spamd_address main option now supports a mixed list of local
413 and remote servers. Remote servers can be IPv6 addresses, and
414 specify a port-range.
416 JH/17 Bug 68: The spamd_address main option now supports an optional
417 timeout value per server.
419 JH/18 Bug 1581: Router and transport options headers_add/remove can
420 now have the list separator specified.
422 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
425 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
428 JH/21 Support for the A6 type of dns record is withdrawn.
430 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
431 rather than the verbs used.
433 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
434 from 255 to 1024 chars.
436 JH/24 Verification callouts now attempt to use TLS by default.
438 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
439 are generic router options now. The defaults didn't change.
441 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
442 Original patch from Alexander Shikoff, worked over by JH.
444 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
445 files if ZCAT_COMMAND is not executable.
447 JH/26 Bug 1539: Add timout/retry options on dnsdb lookups.
449 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
451 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
452 Normally benign, it bites when the pair was led to by a CNAME;
453 modern usage is to not canoicalize the domain to a CNAME target
454 (and we were inconsistent anyway for A-only vs AAAA+A).
456 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
458 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
459 when evaluating $sender_host_dnssec.
461 JH/31 Check the HELO verification lookup for DNSSEC, adding new
462 $sender_helo_dnssec variable.
464 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
466 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
468 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
470 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
471 documented as working, but never had. Support all but $spam_report.
473 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
474 added for tls authenticator.
476 HS/03 Add perl_taintmode main config option
481 TL/01 When running the test suite, the README says that variables such as
482 no_msglog_check are global and can be placed anywhere in a specific
483 test's script, however it was observed that placement needed to be near
484 the beginning for it to behave that way. Changed the runtest perl
485 script to read through the entire script once to detect and set these
486 variables, reset to the beginning of the script, and then run through
487 the script parsing/test process like normal.
489 TL/02 The BSD's have an arc4random API. One of the functions to induce
490 adding randomness was arc4random_stir(), but it has been removed in
491 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
492 function when detected.
494 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
495 cause callback expansion.
497 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
498 syntax errors in an expansion can be treated as a string instead of
499 logging or causing an error, due to the internal use of bool_lax
500 instead of bool when processing it.
502 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
503 server certificates when making smtp deliveries.
505 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
507 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
509 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
511 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
512 Merged patch from Sebastian Wiedenroth.
514 JH/05 Fix results-pipe from transport process. Several recipients, combined
515 with certificate use, exposed issues where response data items split
516 over buffer boundaries were not parsed properly. This eventually
517 resulted in duplicates being sent. This issue only became common enough
518 to notice due to the introduction of conection certificate information,
519 the item size being so much larger. Found and fixed by Wolfgang Breyha.
521 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
522 size buffer was used, resulting in syntax errors when an expansion
525 JH/07 Add support for directories of certificates when compiled with a GnuTLS
526 version 3.3.6 or later.
528 JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef
529 is EXPERIMENTAL_EVENT, the main-configuration and transport options
530 both become "event_action", the variables become $event_name, $event_data
531 and $event_defer_errno. There is a new variable $verify_mode, usable in
532 routers, transports and related events. The tls:cert event is now also
533 raised for inbound connections, if the main configuration event_action
536 TL/06 In test suite, disable OCSP for old versions of openssl which contained
537 early OCSP support, but no stapling (appears to be less than 1.0.0).
539 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
540 server certificate names available under the smtp transport option
541 "tls_verify_cert_hostname" now do not permit multi-component wildcard
544 JH/10 Time-related extraction expansions from certificates now use the main
545 option "timezone" setting for output formatting, and are consistent
546 between OpenSSL and GnuTLS compilations. Bug 1541.
548 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
549 encoded parameter in the incoming message. Bug 1558.
551 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
552 include certificate info, eximon was claiming there were spoolfile
555 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
557 JH/14 Log delivery-related information more consistently, using the sequence
558 "H=<name> [<ip>]" wherever possible.
560 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
561 are problematic for Debian distribution, omit them from the release
564 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
566 JH/16 Fix string representation of time values on 64bit time_t anchitectures.
569 JH/17 Fix a null-indirection in certextract expansions when a nondefault
570 output list separator was used.
575 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
576 checkers that were complaining about end of non-void function with no
579 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
580 This was a regression intruduced in 4.83 by another bugfix.
582 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
584 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
585 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
591 TF/01 Correctly close the server side of TLS when forking for delivery.
593 When a message was received over SMTP with TLS, Exim failed to clear up
594 the incoming connection properly after forking off the child process to
595 deliver the message. In some situations the subsequent outgoing
596 delivery connection happened to have the same fd number as the incoming
597 connection previously had. Exim would try to use TLS and fail, logging
598 a "Bad file descriptor" error.
600 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
601 utilities have not been installed.
603 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
604 temporary space as the ACL may create new global variables.
606 TL/01 LDAP support uses per connection or global context settings, depending
607 upon the detected version of the libraries at build time.
609 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
610 to extract and use the src ip:port in logging and expansions as if it
611 were a direct connection from the outside internet. PPv2 support was
612 updated based on HAProxy spec change in May 2014.
614 JH/02 Add ${listextract {number}{list}{success}{fail}}.
616 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
617 Properly escape header and check for NULL return.
619 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
622 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
624 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
625 characters in header names, implemented as a verify condition.
626 Contributed by Michael Fischer v. Mollard.
628 TL/05 Rename SPF condition results err_perm and err_temp to standardized
629 results permerror and temperror. Previous values are deprecated but
630 still accepted. In a future release, err_perm and err_temp will be
631 completely removed, which will be a backward incompatibility if the
632 ACL tests for either of these two old results. Patch contributed by
633 user bes-internal on the mailing list.
635 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
637 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
638 selectors, in both main and reject logs.
640 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
643 JH/07 Add malware type "sock" for talking to simple daemon.
645 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
647 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
648 routers/transports under cutthrough routing.
650 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
651 numbers. Touch up "bool" conditional to keep the same definition.
653 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
655 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
657 JH/12 Expand items in router/transport headers_add or headers_remove lists
658 individually rather than the list as a whole. Bug 1452.
660 Required for reasonable handling of multiple headers_ options when
661 they may be empty; requires that headers_remove items with embedded
662 colons must have them doubled (or the list-separator changed).
664 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
665 view the policy declared in the DMARC record. Currently, $dmarc_status
666 is a combined value of both the record presence and the result of the
669 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
671 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
672 dnslookup router and the smtp transport (applying to the forward
675 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
676 of ldap servers used for a specific lookup. Patch provided by Heiko
679 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
680 New variable $lookup_dnssec_authenticated for observability.
682 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
683 Patch submitted by Lars Timman.
685 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
687 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
688 Requires trusted mode and valid format message id, aborts otherwise.
689 Patch contributed by Heiko Schlichting.
691 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
692 certextract with support for various fields. Bug 1358.
694 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
695 is requested by default, modifiable by smtp transport option
698 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
699 operate on certificate variables to give certificate fingerprints
700 Also new ${sha256:cert_variable}.
702 JH/23 The PRDR feature is moved from being Experimental into the mainline.
704 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
705 Christian Aistleitner.
707 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
709 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
710 file. Patch from Wolfgang Breyha.
712 JH/25 Expand the coverage of the delivery $host and $host_address to
713 client authenticators run in verify callout. Bug 1476.
715 JH/26 Port service names are now accepted for tls_on_connect_ports, to
716 align with daemon_smtp_ports. Bug 72.
718 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
719 support and error reporting did not work properly.
721 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
722 and is readable. Patch from Andrew Colin Kissa.
724 TL/14 Enhance documentation of ${run expansion and how it parses the
725 commandline after expansion, particularly in the case when an
726 unquoted variable expansion results in an empty value.
728 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
730 PP/02 Fix internal collision of T_APL on systems which support RFC3123
731 by renaming away from it. Addresses GH issue 15, reported by
734 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
736 TL/15 SECURITY: prevent double expansion in math comparison functions
737 (can expand unsanitized data). Not remotely exploitable.
744 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
746 PP/02 Make -n do something, by making it not do something.
747 When combined with -bP, the name of an option is not output.
749 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
752 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
753 $sender_host_name and config options to manage this, and basic check
756 PP/05 DSCP support for outbound connections and control modifier for inbound.
758 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
759 (Only plugin which currently uses this is kerberos4, which nobody should
760 be using, but we should make it available and other future plugins might
761 conceivably use it, even though it would break NAT; stuff *should* be
762 using channel bindings instead).
764 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
765 name; added for Sendmail compatibility; requires admin caller.
766 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
767 just ignore it); requires trusted caller.
768 Also parse but ignore: -Ac -Am -X<logfile>
771 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
773 TL/02 Add +smtp_confirmation as a default logging option.
775 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
776 Patch by Magnus Holmgren from 2007-02-20.
778 TL/04 Bugzilla 1281 - Spec typo.
779 Bugzilla 1283 - Spec typo.
780 Bugzilla 1290 - Spec grammar fixes.
782 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
784 TL/06 Add Experimental DMARC support using libopendmarc libraries.
786 TL/07 Fix an out of order global option causing a segfault. Reported to dev
787 mailing list by by Dmitry Isaikin.
789 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
791 JH/02 Support "G" suffix to numbers in ${if comparisons.
793 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
795 NM/01 Bugzilla 1197 - Spec typo
796 Bugzilla 1196 - Spec examples corrections
798 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
800 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
801 gnutls_enable_pkcs11, but renamed to more accurately indicate its
804 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
805 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
807 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
808 "acl {{name}{arg}...}", and optional args on acl condition
811 JH/05 Permit multiple router/transport headers_add/remove lines.
813 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
815 JH/07 Avoid using a waiting database for a single-message-only transport.
816 Performance patch from Paul Fisher. Bugzilla 1262.
818 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
821 JH/09 Add $headers_added variable, with content from use of ACL modifier
822 add_header (but not yet added to the message). Bugzilla 199.
824 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
825 Pulled from Bugzilla 817 by Wolfgang Breyha.
827 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
829 (nb: this is the same fix as in Exim 4.80.1)
831 JH/11 Add A= logging on delivery lines, and a client_set_id option on
834 JH/12 Add optional authenticated_sender logging to A= and a log_selector
837 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
839 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
840 advertise SMTP AUTH mechanism to us, instead of a generic
841 protocol violation error. Also, make Exim more robust to bad
842 data from the Dovecot auth socket.
844 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
846 When a queue runner is handling a message, Exim first routes the
847 recipient addresses, during which it prunes them based on the retry
848 hints database. After that it attempts to deliver the message to
849 any remaining recipients. It then updates the hints database using
852 So if a recipient address works intermittently, it can get repeatedly
853 deferred at routing time. The retry hints record remains fresh so the
854 address never reaches the final cutoff time.
856 This is a fairly common occurrence when a user is bumping up against
857 their storage quota. Exim had some logic in its local delivery code
858 to deal with this. However it did not apply to per-recipient defers
859 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
861 This change adds a proper retry rule check during routing so that the
862 final cutoff time is checked against the message's age. We only do
863 this check if there is an address retry record and there is not a
864 domain retry record; this implies that previous attempts to handle
865 the address had the retry_use_local_parts option turned on. We use
866 this as an approximation for the destination being like a local
867 delivery, as in LMTP.
869 I suspect this new check makes the old local delivery cutoff check
870 redundant, but I have not verified this so I left the code in place.
872 TF/02 Correct gecos expansion when From: is a prefix of the username.
874 Test 0254 submits a message to Exim with the header
878 When I ran the test suite under the user fanf2, Exim expanded
879 the header to contain my full name, whereas it should have added
880 a Resent-Sender: header. It erroneously treats any prefix of the
881 username as equal to the username.
883 This change corrects that bug.
885 GF/01 DCC debug and logging tidyup
886 Error conditions log to paniclog rather than rejectlog.
887 Debug lines prefixed by "DCC: " to remove any ambiguity.
889 TF/03 Avoid unnecessary rebuilds of lookup-related code.
891 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
892 Bug spotted by Jeremy Harris; was flawed since initial commit.
893 Would have resulted in OCSP responses post-SNI triggering an Exim
894 NULL dereference and crash.
896 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
898 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
899 Bug detection, analysis and fix by Samuel Thibault.
900 Bugzilla 1331, Debian bug #698092.
902 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
904 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
905 Server implementation by Todd Lyons, client by JH.
906 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
907 config variable "prdr_enable" controls whether the server
908 advertises the facility. If the client requests PRDR a new
909 acl_data_smtp_prdr ACL is called once for each recipient, after
910 the body content is received and before the acl_smtp_data ACL.
911 The client is controlled by bolth of: a hosts_try_prdr option
912 on the smtp transport, and the server advertisement.
913 Default client logging of deliveries and rejections involving
914 PRDR are flagged with the string "PRDR".
916 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
917 fclose(). Diagnosis by Todd Lyons.
919 PP/17 Update configure.default to handle IPv6 localhost better.
920 Patch by Alain Williams (plus minor tweaks).
923 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
924 This is now consistent with GnuTLS, and is now documented: the
925 previous undocumented portable approach to treating the option as
926 unset was to force an expansion failure. That still works, and
927 an empty string is now equivalent.
929 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
930 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
931 not performing validation itself.
933 PP/20 Added force_command boolean option to pipe transport.
934 Patch from Nick Koston, of cPanel Inc.
936 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
939 TF/04 Added udpsend ACL modifer and hexquote expansion operator
941 PP/21 Fix eximon continuous updating with timestamped log-files.
942 Broken in a format-string cleanup in 4.80, missed when I repaired the
943 other false fix of the same issue.
944 Report and fix from Heiko Schlichting.
947 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
948 Report from Prashanth Katuri.
950 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
951 It's SecureTransport, so affects any MacOS clients which use the
952 system-integrated TLS libraries, including email clients.
954 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
955 using a MIME ACL for non-SMTP local injection.
956 Report and assistance in diagnosis by Warren Baker.
958 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
960 JH/16 Fix comparisons for 64b. Bugzilla 1385.
962 TL/09 Add expansion variable $authenticated_fail_id to keep track of
963 last id that failed so it may be referenced in subsequent ACL's.
965 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
968 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
969 ldap library initialization, allowing self-signed CA's to be
970 used. Also properly sets require_cert option later in code by
971 using NULL (global ldap config) instead of ldap handle (per
972 session). Bug diagnosis and testing by alxgomz.
974 TL/12 Enhanced documentation in the ratelimit.pl script provided in
975 the src/util/ subdirectory.
977 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
978 renamed to Transport Post Delivery Action by Jeremy Harris, as
981 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
982 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
983 redis_servers = needs to be configured which will be used by the redis
984 lookup. Patch from Warren Baker, of The Packet Hub.
986 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
988 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
989 hostname or reverse DNS when processing a host list. Used suggestions
990 from multiple comments on this bug.
992 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
994 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
995 Missed a few lines, added it to make the runtest require no keyboard
998 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
999 contains upper case chars. Make router use caseful_local_part.
1001 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1002 support when GnuTLS has been built with p11-kit.
1008 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1010 This, or similar/improved, will also be change PP/11 of 4.82.
1016 PP/01 Handle short writes when writing local log-files.
1017 In practice, only affects FreeBSD (8 onwards).
1018 Bugzilla 1053, with thanks to Dmitry Isaikin.
1020 NM/01 Bugzilla 949 - Documentation tweak
1022 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1025 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1027 PP/02 Implemented gsasl authenticator.
1029 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1031 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1032 `pkg-config foo` for cflags/libs.
1034 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1035 with rest of GSASL and with heimdal_gssapi.
1037 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1038 `pkg-config foo` for cflags/libs for the TLS implementation.
1040 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1041 properties get this fed in as external SSF. A number of robustness
1042 and debugging improvements to the cyrus_sasl authenticator.
1044 PP/08 cyrus_sasl server now expands the server_realm option.
1046 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1047 Patch by Jeremy Harris.
1049 PP/10 Added dbmjz lookup type.
1051 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1053 PP/12 MAIL args handles TAB as well as SP, for better interop with
1054 non-compliant senders.
1055 Analysis and variant patch by Todd Lyons.
1057 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1058 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1059 Patch from Dirk Mueller <dmueller@suse.com>
1061 PP/13 tls_peerdn now print-escaped for spool files.
1062 Observed some $tls_peerdn in wild which contained \n, which resulted
1063 in spool file corruption.
1065 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1066 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1067 or write after TLS renegotiation, which otherwise led to messages
1070 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1071 as a tracking header (ie: a signed header comes before the signature).
1072 Patch from Wolfgang Breyha.
1074 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1075 comma-sep list; embedded commas doubled.
1077 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1079 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1081 Report and patch from Dmitry Banschikov.
1083 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
1084 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1085 failures. We appear to now support TLS1.1+ with Exim.
1087 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1088 lets Exim select keys and certificates based upon TLS SNI from client.
1089 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1090 before an outbound SMTP session. New log_selector, +tls_sni.
1092 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1093 NULL dereference. Report and patch from Alun Jones.
1095 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1096 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1097 Not seeing resolver debug output on NetBSD, but suspect this is a
1098 resolver implementation change.
1100 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1101 Left warnings. Added "eximon gdb" invocation mode.
1103 PP/21 Defaulting "accept_8bitmime" to true, not false.
1105 PP/22 Added -bw for inetd wait mode support.
1107 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1108 locate the relevant includes and libraries. Made this the default.
1110 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1111 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1113 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1114 This may cause build issues on older platforms.
1116 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1117 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1118 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1119 Added SNI support via GnuTLS too.
1120 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1122 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1124 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1125 Applied second patch from Janne, implementing suggestion to default
1126 multiple-strings-in-record handling to match SPF spec.
1128 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1130 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1131 read-only, out of scope).
1132 Patch from Wolfgang Breyha, report from Stuart Northfield.
1134 PP/29 Fix three issues highlighted by clang analyser static analysis.
1135 Only crash-plausible issue would require the Cambridge-specific
1136 iplookup router and a misconfiguration.
1137 Report from Marcin Mirosław.
1139 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1141 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1142 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1143 As part of this, removing so much warning spew let me fix some minor
1144 real issues in debug logging.
1146 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1147 assignment on my part. Fixed.
1149 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1150 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1151 Janne Snabb (who went above and beyond: thank you).
1153 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1154 string otherwise requires a connection and a bunch more work and it's
1155 relatively easy to get wrong. Should also expose TLS library linkage
1158 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1159 64-bit ${eval} (JH/03).
1161 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1162 GNU libc to support some of the 64-bit stuff, should not lead to
1163 conflicts. Defined before os.h is pulled in, so if a given platform
1164 needs to override this, it can.
1166 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1167 protection layer was required, which is not implemented.
1168 Bugzilla 1254, patch from Wolfgang Breyha.
1170 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1171 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1172 tls_dhparam take prime identifiers. Also unbreak combination of
1173 OpenSSL+DH_params+TLSSNI.
1175 PP/39 Disable SSLv2 by default in OpenSSL support.
1181 PP/01 Solaris build fix for Oracle's LDAP libraries.
1182 Bugzilla 1109, patch from Stephen Usher.
1184 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1186 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1189 TF/02 Fix a couple more cases where we did not log the error message
1190 when unlink() failed. See also change 4.74-TF/03.
1192 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1193 lock up or crash if it happened to be inside a call to libc when it
1194 got a SIGUSR1 from exiwhat.
1196 The SIGUSR1 handler appends the current process status to the process
1197 log which is later printed by exiwhat. It used to use the general
1198 purpose logging code to do this, but several functions it calls are
1199 not safe for signals.
1201 The new output code in the SIGUSR1 handler is specific to the process
1202 log, and simple enough that it's easy to inspect for signal safety.
1203 Removing some special cases also simplifies the general logging code.
1204 Removing the spurious timestamps from the process log simplifies
1207 TF/04 Improved ratelimit ACL condition.
1209 The /noupdate option has been deprecated in favour of /readonly which
1210 has clearer semantics. The /leaky, /strict, and /readonly update modes
1211 are mutually exclusive. The update mode is no longer included in the
1212 database key; it just determines when the database is updated. (This
1213 means that when you upgrde Exim will forget old rate measurements.)
1215 Exim now checks that the per_* options are used with an update mode that
1216 makes sense for the current ACL. For example, when Exim is processing a
1217 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1218 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1219 must specify per_mail/readonly. If you omit the update mode it defaults to
1220 /leaky where that makes sense (as before) or /readonly where required.
1222 The /noupdate option is now undocumented but still supported for
1223 backwards compatibility. It is equivalent to /readonly except that in
1224 ACLs where /readonly is required you may specify /leaky/noupdate or
1225 /strict/noupdate which are treated the same as /readonly.
1227 A useful new feature is the /count= option. This is a generalization
1228 of the per_byte option, so that you can measure the throughput of other
1229 aggregate values. For example, the per_byte option is now equivalent
1230 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1232 The per_rcpt option has been generalized using the /count= mechanism
1233 (though it's more complicated than the per_byte equivalence). When it is
1234 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1235 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1236 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1237 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1238 Note that using per_rcpt with a non-readonly update mode in more than
1239 one ACL will cause the recipients to be double-counted. (The per_mail
1240 and per_byte options don't have this problem.)
1242 The handling of very low rates has changed slightly. If the computed rate
1243 is less than the event's count (usually one) then this event is the first
1244 after a long gap. In this case the rate is set to the same as this event's
1245 count, so that the first message of a spam run is counted properly.
1247 The major new feature is a mechanism for counting the rate of unique
1248 events. The new per_addr option counts the number of different
1249 recipients that someone has sent messages to in the last time period. It
1250 behaves like per_rcpt if all the recipient addresses are different, but
1251 duplicate recipient addresses do not increase the measured rate. Like
1252 the /count= option this is a general mechanism, so the per_addr option
1253 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1254 example, measure the rate that a client uses different sender addresses
1255 with the options per_mail/unique=$sender_address. There are further
1256 details in the main documentation.
1258 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1260 TF/06 Removed a few PCRE remnants.
1262 TF/07 Automatically extract Exim's version number from tags in the git
1263 repository when doing development or release builds.
1265 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1266 Bugzilla 879. Patch from Paul Fisher.
1268 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1269 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1272 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1274 PP/05 Variable $av_failed, true if the AV scanner deferred.
1275 Bugzilla 1078. Patch from John Horne.
1277 PP/06 Stop make process more reliably on build failure.
1278 Bugzilla 1087. Patch from Heiko Schlittermann.
1280 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1281 Bugzilla 1089. Patch from Heiko Schlittermann.
1283 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1284 Bugzilla 1131. Patch from Holger Weiß.
1286 PP/09 Handle IPv6 addresses with SPF.
1287 Bugzilla 860. Patch from Wolfgang Breyha.
1289 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1291 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1294 PP/11 match_* no longer expand right-hand-side by default.
1295 New compile-time build option, EXPAND_LISTMATCH_RHS.
1296 New expansion conditions, "inlist", "inlisti".
1298 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1300 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1302 PP/14 fix log_write() format string regression from TF/03.
1303 Bugzilla 1152. Patch from Dmitry Isaikin.
1309 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1311 PP/02 Harmonised TLS library version reporting; only show if debugging.
1312 Layout now matches that introduced for other libraries in 4.74 PP/03.
1314 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1316 PP/04 New "dns_use_edns0" global option.
1318 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1321 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1322 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1324 TK/01 Updated PolarSSL code to 0.14.2.
1325 Bugzilla 1097. Patch from Andreas Metzler.
1327 PP/07 Catch divide-by-zero in ${eval:...}.
1328 Fixes bugzilla 1102.
1330 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1333 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1334 format-string attack -- SECURITY: remote arbitrary code execution.
1336 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1337 time unintentionally subject to list matching rules, letting the header
1338 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1339 arbitrary string expansion). This allowed for information disclosure.
1341 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1342 INT_MIN/-1 -- value coerced to INT_MAX.
1348 NM/01 Workround for PCRE version dependency in version reporting
1351 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1352 This fixes portability to compilers other than gcc, notably
1353 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1355 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1356 makefiles for portability to HP-UX and POSIX correctness.
1358 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1359 Also via indented variable definition in the Makefile.
1360 (Debugging by Oliver Heesakkers).
1362 PP/02 Restore caching of spamd results with expanded spamd_address.
1363 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1365 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1366 Improves build reliability. Fix from: Frank Elsner
1368 NM/02 Fix wide character breakage in the rfc2047 coding
1369 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1371 NM/03 Allow underscore in dnslist lookups
1372 Fixes bug 1026. Patch from Graeme Fowler
1374 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1375 Code patches from Adam Ciarcinski of NetBSD.
1377 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1380 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1381 is logged, to avoid truncation. Patch from John Horne.
1383 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1384 Patch from Jakob Hirsch.
1386 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1387 SQL string expansion failure details.
1388 Patch from Andrey Oktyabrski.
1390 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1391 Patch from Simon Arlott.
1393 PP/09 New lookups functionality failed to compile on old gcc which rejects
1394 extern declarations in function scope.
1395 Patch from Oliver Fleischmann
1397 PP/10 Use sig_atomic_t for flags set from signal handlers.
1398 Check getgroups() return and improve debugging.
1399 Fixed developed for diagnosis in bug 927 (which turned out to be
1402 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1403 Patch from Mark Zealey.
1405 PP/12 Bugzilla 1056: Improved spamd server selection.
1406 Patch from Mark Zealey.
1408 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1409 Based on patch from Heiko Schlittermann.
1411 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1412 Patch from Uwe Doering, sign-off by Michael Haardt.
1414 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1415 variable declaration deep within a block. Bug and patch from
1418 PP/15 lookups-Makefile IRIX compatibilty coercion.
1420 PP/16 Make DISABLE_DKIM build knob functional.
1422 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1423 Patch by Simon Arlott
1425 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1426 variable argument macros. Our copy now differs from upstream.
1432 TF/01 Failure to get a lock on a hints database can have serious
1433 consequences so log it to the panic log.
1435 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1436 controlled using the smtp_confirmation log selector.
1438 TF/03 Include the error message when we fail to unlink a spool file.
1440 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1441 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1442 for maintaining out-of-tree patches for some time.
1444 PP/01 Bugzilla 139: Documentation and portability issues.
1445 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1446 Handle per-OS dynamic-module compilation flags.
1448 PP/02 Let /dev/null have normal permissions.
1449 The 4.73 fixes were a little too stringent and complained about the
1450 permissions on /dev/null. Exempt it from some checks.
1451 Reported by Andreas M. Kirchwitz.
1453 PP/03 Report version information for many libraries, including
1454 Exim version information for dynamically loaded libraries. Created
1455 version.h, now support a version extension string for distributors
1456 who patch heavily. Dynamic module ABI change.
1458 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1459 privilege escalation vulnerability whereby the Exim run-time user
1460 can cause root to append content of the attacker's choosing to
1463 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1466 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1467 If dropping privileges for untrusted macros, we disabled normal logging
1468 on the basis that it would fail; for the Exim run-time user, this is not
1469 the case, and it resulted in successful deliveries going unlogged.
1470 Fixed. Reported by Andreas Metzler.
1476 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1477 only prepend for the Resent-* case. Fixes regression introduced in
1478 Exim 4.70 by NM/22 for Bugzilla 607.
1480 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1481 increasing numbers of administrators be bitten by this.
1483 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1485 PP/03 Bugzilla 994: added openssl_options main configuration option.
1487 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1489 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1491 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1493 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1494 without a peer certificate, leading to a segfault because of an
1495 assumption that peers always have certificates. Be a little more
1496 paranoid. Problem reported by Martin Tscholak.
1498 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1499 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1500 NB: ClamAV planning to remove STREAM in "middle of 2010".
1501 CL also introduces -bmalware, various -d+acl logging additions and
1502 more caution in buffer sizes.
1504 PP/09 Implemented reverse_ip expansion operator.
1506 PP/10 Bugzilla 937: provide a "debug" ACL control.
1508 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1510 PP/12 Bugzilla 973: Implement --version.
1512 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1514 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1516 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1518 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1519 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1520 ignore trailing whitespace.
1522 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1524 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1527 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1528 Notification from Dr Andrew Aitchison.
1530 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1531 ExtendedDetectionInfo response format.
1532 Notification from John Horne.
1534 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1537 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1538 XSL and documented dependency on system catalogs, with examples of how
1541 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1544 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1545 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1546 configuration file which is writeable by the Exim user or group.
1548 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1549 of configuration files to cover files specified with the -C option if
1550 they are going to be used with root privileges, not just the default
1553 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1554 option (effectively making it always true).
1556 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1557 files to be used while preserving root privileges.
1559 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1560 that rogue child processes cannot use them.
1562 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1563 run-time user, instead of root.
1565 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1566 Exim run-time user without dropping privileges.
1568 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1569 result string, instead of calling string_vformat() twice with the same
1572 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1573 for other users. Others should always drop root privileges if they use
1574 -C on the command line, even for a whitelisted configure file.
1576 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1578 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1584 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1585 $data_path, and $header_path variables; fixed documentation bugs and
1588 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1589 exipick to access non-standard spools, including the "frozen" queue
1592 NM/01 Bugzilla 965: Support mysql stored procedures.
1593 Patch from Alain Williams
1595 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1597 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1598 Patch from Andreas Metzler
1600 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1601 Patch from Kirill Miazine
1603 NM/05 Bugzilla 671: Added umask to procmail example.
1605 JJ/03 installed exipick 20100323.0, fixing doc bug
1607 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1608 directory. Notification and patch from Dan Rosenberg.
1610 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1612 TK/02 Improve log output when DKIM signing operation fails.
1614 MH/01 Treat the transport option dkim_domain as a colon separated
1615 list, not as a single string, and sign the message with each element,
1616 omitting multiple occurences of the same signer.
1618 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1619 Bugzilla 985, 986. Patch by Simon Arlott
1621 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1622 Patch by Simon Arlott
1624 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1625 MBX locking. Notification from Dan Rosenberg.
1631 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1633 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1635 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1637 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1639 NM/04 Bugzilla 915: Flag broken perl installation during build.
1645 TK/01 Added patch by Johannes Berg that expands the main option
1646 "spamd_address" if it starts with a dollar sign.
1648 TK/02 Write list of recipients to X-Envelope-Sender header when building
1649 the mbox-format spool file for content scanning (suggested by Jakob
1652 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1653 (http://www.dcc-servers.net/) support via dccifd. Activated by
1654 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1656 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1657 by Mark Daniel Reidel <mr@df.eu>.
1659 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1660 When building exim an external PCRE library is now needed -
1661 PCRE is a system library on the majority of modern systems.
1662 See entry on PCRE_LIBS in EDITME file.
1664 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1665 conversation. Added nologin parameter to request.
1666 Patch contributed by Kirill Miazine.
1668 TF/01 Do not log submission mode rewrites if they do not change the address.
1670 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1672 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1673 log files in place. Contributed by Roberto Lima.
1675 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1677 TF/03 Bugzilla 615: When checking the local_parts router precondition
1678 after a local_part_suffix or local_part_prefix option, Exim now
1679 does not use the address's named list lookup cache, since this
1680 contains cached lookups for the whole local part.
1682 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1683 Robert Millan. Documentation is in experimental-spec.txt.
1685 TF/04 Bugzilla 668: Fix parallel build (make -j).
1687 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1689 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1690 Patch provided by Jan Srzednicki.
1692 TF/05 Leading white space used to be stripped from $spam_report which
1693 wrecked the formatting. Now it is preserved.
1695 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1696 that they are available at delivery time.
1698 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1700 TF/08 TLS error reporting now respects the incoming_interface and
1701 incoming_port log selectors.
1703 TF/09 Produce a more useful error message if an SMTP transport's hosts
1704 setting expands to an empty string.
1706 NM/06 Bugzilla 744: EXPN did not work under TLS.
1707 Patch provided by Phil Pennock.
1709 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1710 Patch provided by Richard Godbee.
1712 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1713 acl_smtp_notquit, added index entry.
1715 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1716 Patch provided by Eugene Bujak.
1718 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1719 accept(). Patch provided by Maxim Dounin.
1721 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1722 Patch provided by Phil Pennock.
1724 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1726 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1727 Patch provided by Brad "anomie" Jorsch.
1729 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1730 Patch provided by Dean Brooks.
1732 TK/05 Add native DKIM support (does not depend on external libraries).
1734 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1735 Patch provided by Graeme Fowler.
1737 NM/16 Bugzilla 851: Documentation example syntax fix.
1739 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1741 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1744 NM/19 Bugzilla 745: TLS version reporting.
1745 Patch provided by Phil Pennock.
1747 NM/20 Bugzilla 167: bool: condition support.
1748 Patch provided by Phil Pennock.
1750 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1751 clients. Patch provided by Phil Pennock.
1753 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1754 Patch provided by Brad "anomie" Jorsch.
1756 NM/23 Bugzilla 687: Fix misparses in eximstats.
1757 Patch provided by Heiko Schlittermann.
1759 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1760 Patch provided by Heiko Schlittermann.
1762 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1763 plus update to original patch.
1765 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1767 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1768 Patch provided by David Brownlee.
1770 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1772 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1774 NM/30 Bugzilla 888: TLS documentation bugfixes.
1776 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1778 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1779 Unlike the original bugzilla I have changed all shell scripts in src tree.
1781 NM/33 Bugzilla 898: Transport filter timeout fix.
1782 Patch by Todd Rinaldo.
1784 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1785 Patch by Serge Demonchaux.
1787 NM/35 Bugzilla 39: Base64 decode bug fixes.
1788 Patch by Jakob Hirsch.
1790 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1792 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1794 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1796 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1802 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1803 ALT-N's libdkim that I have put here:
1804 http://duncanthrax.net/exim-experimental/
1806 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1807 were called 'true' and it seems that C99 defines that as a reserved
1808 keyword to be used with 'bool' variable types. That means you could
1809 not include C99-style headers which use bools without triggering
1810 build errors in sieve.c.
1812 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1813 as mailq or other aliases. Changed the --help handling significantly
1814 to do whats expected. exim_usage() emits usage/help information.
1816 SC/01 Added the -bylocaldomain option to eximstats.
1818 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1820 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1822 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1828 PH/01 Another patch from the Sieve maintainer.
1830 PH/02 When an IPv6 address is converted to a string for single-key lookup
1831 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1832 dots are used instead of colons so that keys in lsearch files need not
1833 contain colons. This was done some time before quoting was made available
1834 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1835 (notated using the quote facility) so as to distinguish them from IPv4
1836 keys. This meant that lookups for IP addresses in host lists did not work
1837 for iplsearch lookups.
1839 This has been fixed by arranging for IPv6 addresses to be expressed with
1840 colons if the lookup type is iplsearch. This is not incompatible, because
1841 previously such lookups could never work.
1843 The situation is now rather anomolous, since one *can* have colons in
1844 ordinary lsearch keys. However, making the change in all cases is
1845 incompatible and would probably break a number of configurations.
1847 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1850 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1851 conversion specification without a maximum field width, thereby enabling
1852 a rogue spamd server to cause a buffer overflow. While nobody in their
1853 right mind would setup Exim to query an untrusted spamd server, an
1854 attacker that gains access to a server running spamd could potentially
1855 exploit this vulnerability to run arbitrary code as the Exim user.
1857 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1858 $primary_hostname instead of what libspf2 thinks the hosts name is.
1860 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1861 a directory entry by the name of the lookup key. Previously, if a
1862 symlink pointed to a non-existing file or a file in a directory that
1863 Exim lacked permissions to read, a lookup for a key matching that
1864 symlink would fail. Now it is enough that a matching directory entry
1865 exists, symlink or not. (Bugzilla 503.)
1867 PH/03 The body_linecount and body_zerocount variables are now exported in the
1870 PH/04 Added the $dnslist_matched variable.
1872 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1873 This means they are set thereafter only if the connection becomes
1876 PH/06 Added the client_condition to authenticators so that some can be skipped
1877 by clients under certain conditions.
1879 PH/07 The error message for a badly-placed control=no_multiline_responses left
1880 "_responses" off the end of the name.
1882 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1884 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1885 (without spaces) instead of just copying the configuration text.
1887 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1889 PH/11 Added $max_received_linelength.
1891 PH/12 Added +ignore_defer and +include_defer to host lists.
1893 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1894 way in which PCRE > 7.0 is built.
1896 PH/14 Implemented queue_only_load_latch.
1898 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1899 MAIL command. The effect was to mangle the value on 64-bit systems.
1901 PH/16 Another patch from the Sieve maintainer.
1903 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1905 PH/18 If a system quota error occurred while trying to create the file for
1906 a maildir delivery, the message "Mailbox is full" was not appended to the
1907 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1908 only to a quota excession during the actual writing of the file.
1910 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1911 characters?) which causes problems in log lines. The DN values are now
1912 passed through string_printing() before being added to log lines.
1914 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1915 and InterBase are left for another time.)
1917 PH/21 Added message_body_newlines option.
1919 PH/22 Guard against possible overflow in moan_check_errorcopy().
1921 PH/23 POSIX allows open() to be a macro; guard against that.
1923 PH/24 If the recipient of an error message contained an @ in the local part
1924 (suitably quoted, of course), incorrect values were put in $domain and
1925 $local_part during the evaluation of errors_copy.
1931 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1932 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1935 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1936 issue a MAIL command.
1938 PH/02 In an ACL statement such as
1940 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1942 if a client was not listed at all, or was listed with a value other than
1943 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1944 the condition was not true (as it should be), so access was not denied.
1945 The bug was that the ! inversion was incorrectly passed on to the second
1946 item. This has been fixed.
1948 PH/03 Added additional dnslists conditions == and =& which are different from
1949 = and & when the dns lookup returns more than one IP address.
1951 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1952 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1954 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1955 FSYNC, which compiles an option called disable_fsync that allows for
1956 bypassing fsync(). The documentation is heavily laced with warnings.
1958 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1960 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1961 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1962 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1963 including adding "make clean"; (3) Added -fPIC when compiling the test
1964 dynamically loaded module, to get rid of a warning.
1966 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1967 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1968 = 0s. The bug is otherwise harmless.
1970 PH/07 There was a bug in the dovecot authenticator such that the value of
1971 $auth1 could be overwritten, and so not correctly preserved, after a
1972 successful authentication. This usually meant that the value preserved by
1973 the server_setid option was incorrect.
1975 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1977 PH/09 Installed PCRE release 7.0.
1979 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1980 run for batched SMTP input. It is now run at the start of every message
1981 in the batch. While fixing this I discovered that the process information
1982 (output by running exiwhat) was not always getting set for -bs and -bS
1983 input. This is fixed, and it now also says "batched" for BSMTP.
1985 PH/11 Added control=no_pipelining.
1987 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1988 patch, slightly modified), and move the expansion of helo_data till after
1989 the connection is made in the smtp transport (so it can use these
1992 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1994 PH/14 Added log_selector = +pid.
1996 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1998 PH/16 Add ${if forany and ${if forall.
2000 PH/17 Added dsn_from option to vary the From: line in DSNs.
2002 PH/18 Flush SMTP output before performing a callout, unless control =
2003 no_callout_flush is set.
2005 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2006 was true (the default) a successful delivery failed to delete the retry
2007 item, thus causing premature timeout of the address. The bug is now
2010 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2012 PH/21 Long custom messages for fakedefer and fakereject are now split up
2013 into multiline reponses in the same way that messages for "deny" and
2014 other ACL rejections are.
2016 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2017 with slight modification.
2019 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2020 draft, changing the syntax and factoring some duplicate code".
2022 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2023 for deliveries of the second and subsequent messages over the same SMTP
2026 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2027 ${reduce, with only minor "tidies".
2029 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2031 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2032 expansion side effects.
2034 PH/27 When a message times out after an over-quota error from an Exim-imposed
2035 quota, the bounce message says "mailbox is full". This message was not
2036 being given when it was a system quota that was exceeded. It now should
2039 MH/03 Made $recipients available in local_scan(). local_scan() already has
2040 better access to the recipient list through recipients_list[], but
2041 $recipients can be useful in postmaster-provided expansion strings.
2043 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2044 in the case of a MAIL command with additional options following the
2045 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2046 were accidentally chopped off.
2048 PH/29 SMTP synchronization checks are implemented when a command is read -
2049 there is a check that no more input is waiting when there shouldn't be
2050 any. However, for some commands, a delay in an ACL can mean that it is
2051 some time before the response is written. In this time, more input might
2052 arrive, invalidly. So now there are extra checks after an ACL has run for
2053 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2054 pipelining has not been advertised.
2056 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2058 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2059 returned in the SMTP response when smtp_return_error_details was false.
2060 This has been fixed.
2062 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2063 instead of the C I/O that was originally supplied, because problems were
2064 reported on Solaris.
2066 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2067 Exim which did not show up earlier: it was assuming that a call to
2068 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2069 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2070 was a macro that became an assignment, so it seemed to work. This has
2071 changed to a proper function call with a void return, hence the compile
2072 error. Exim's code has been fixed.
2074 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2077 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2079 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2081 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2082 because it turns out to be too big or there is a timeout) there is no
2083 "Completed" line in the log. When some messages of this type were
2084 selected by exigrep, they were listed as "not completed". Others were
2085 picked up by some special patterns. I have improved the selection
2086 criteria to be more general.
2088 PH/38 The host_find_failed option in the manualroute router can now be set
2089 to "ignore", to completely ignore a host whose IP address cannot be
2090 found. If all hosts are ignored, the behaviour is controlled by the new
2091 host_all_ignored option.
2093 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2094 homing or because of multiple MX records with /mx) generated more than
2095 one IP address, and the following item turned out to be the local host,
2096 all the secondary addresses of the first item were incorrectly removed
2097 from the list, along with the local host and any following hosts (which
2098 is what is supposed to happen).
2100 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2101 whoever called Exim into the -H file. In the case of the daemon it was
2102 behaving confusingly. When first started, it used values for whoever
2103 started the daemon, but after a SIGHUP it used the Exim user (because it
2104 calls itself on a restart). I have changed the code so that it now always
2107 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2108 message are rejected with the same error (e.g. no authentication or bad
2109 sender address), and a DATA command is nevertheless sent (as can happen
2110 with PIPELINING or a stupid MUA), the error message that was given to the
2111 RCPT commands is included in the rejection of the DATA command. This is
2112 intended to be helpful for MUAs that show only the final error to their
2115 PH/42 Another patch from the Sieve maintainer.
2117 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2118 Eximstats - Fixed some broken HTML links and added missing column headers
2120 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2121 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2123 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2125 PH/43 Yet another patch from the Sieve maintainer.
2127 PH/44 I found a way to check for a TCP/IP connection going away before sending
2128 the response to the final '.' that terminates a message, but only in the
2129 case where the client has not sent further data following the '.'
2130 (unfortunately, this is allowed). However, in many cases there won't be
2131 any further data because there won't be any more messages to send. A call
2132 to select() can be used: if it shows that the input is "ready", there is
2133 either input waiting, or the socket has been closed. An attempt to read
2134 the next input character can distinguish the two cases. Previously, Exim
2135 would have sent an OK response which the client would never have see.
2136 This could lead to message repetition. This fix should cure that, at
2137 least in a lot of common cases.
2139 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2140 advertised in response to EHLO.
2146 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2147 fixed by 4.65/MH/01 (is this a record?) are fixed:
2149 (i) An empty string was always treated as zero by the numeric comparison
2150 operators. This behaviour has been restored.
2152 (ii) It is documented that the numeric comparison operators always treat
2153 their arguments as decimal numbers. This was broken in that numbers
2154 starting with 0 were being interpreted as octal.
2156 While fixing these problems I realized that there was another issue that
2157 hadn't been noticed. Values of message_size_limit (both the global option
2158 and the transport option) were treated as octal if they started with 0.
2159 The documentation was vague. These values are now always treated as
2160 decimal, and I will make that clear in the documentation.
2166 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2167 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2170 MH/01 Don't check that the operands of numeric comparison operators are
2171 integers when their expansion is in "skipping" mode (fixes bug
2172 introduced by 4.64-PH/07).
2174 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2175 child addresses, Exim now panics and dies. Previously, because the count
2176 is held in a short int, deliveries were likely to be lost. As such a
2177 large number of recipients for a single message is ridiculous
2178 (performance will be very, very poor), I have chosen to impose a limit
2179 rather than extend the field.
2185 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2186 leftover -K file (the existence of which was triggered by #402).
2187 While we were at it, introduced process PID as part of the -K
2188 filename. This should rule out race conditions when creating
2191 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2192 processing considerably. Previous code took too long for large mails,
2193 triggering a timeout which in turn triggers #401.
2195 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2196 in the DK code in transports.c. sendfile() is not really portable,
2197 hence the _LINUX specificness.
2199 TF/01 In the add_headers option to the mail command in an Exim filter,
2200 there was a bug that Exim would claim a syntax error in any
2201 header after the first one which had an odd number of characters
2204 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2205 callout verification, Exim cached a "reject" for the entire domain. This
2206 is correct for most verifications, but it is not correct for a recipient
2207 verification with use_sender or use_postmaster set, because in that case
2208 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2209 case of MAIL FROM:<> rejection from other early rejections (e.g.
2210 rejection of HELO). When verifying a recipient using a non-null MAIL
2211 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2212 Whatever the result of the callout, the value of the domain cache is
2213 left unchanged (for any other kind of callout, getting as far as trying
2214 RCPT means that the domain itself is ok).
2216 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2219 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2220 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2221 session, the daemon ignores ECONNECT errors and logs others; it now
2222 ignores EPIPE as well.
2224 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2225 (quoted-printable decoding).
2227 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2228 later the small subsequent patch to fix an introduced bug.
2230 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2232 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2234 PH/08 An error is now given if message_size_limit is specified negative.
2236 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2237 to be given (somewhat) arbitrary names.
2239 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2242 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2243 miscellaneous code fixes
2245 PH/10 Added the log_reject_target ACL modifier to specify where to log
2248 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2249 hostname. This is wrong, because it relates to the incoming message (and
2250 probably the interface on which it is arriving) and not to the outgoing
2251 callout (which could be using a different interface). This has been
2252 changed to use the value of the helo_data option from the smtp transport
2253 instead - this is what is used when a message is actually being sent. If
2254 there is no remote transport (possible with a router that sets up host
2255 addresses), $smtp_active_hostname is used.
2257 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2258 tweaks were necessary in order to get it to work (see also 21 below):
2259 (a) The code assumed that strncpy() returns a negative number on buffer
2260 overflow, which isn't the case. Replaced with Exim's string_format()
2262 (b) There were several signed/unsigned issues. I just did the minimum
2263 hacking in of casts. There is scope for a larger refactoring.
2264 (c) The code used strcasecmp() which is not a standard C function.
2265 Replaced with Exim's strcmpic() function.
2266 (d) The code set only $1; it now sets $auth1 as well.
2267 (e) A simple test gave the error "authentication client didn't specify
2268 service in request". It would seem that Dovecot has changed its
2269 interface. Fortunately there's a specification; I followed it and
2270 changed what the client sends and it appears to be working now.
2272 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2275 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2276 address A is aliased to B and C, where B exists and C does not. Without
2277 -v the output is "A verified" because verification stops after a
2278 successful redirection if more than one address is generated. However,
2279 with -v the child addresses are also verified. Exim was outputting "A
2280 failed to verify" and then showing the successful verification for C,
2281 with its parentage. It now outputs "B failed to verify", showing B's
2282 parentage before showing the successful verification of C.
2284 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2285 look up a TXT record in a specific list after matching in a combined
2288 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2289 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2290 they consult the DNS. I had assumed they would set it the way they
2291 wanted; and indeed my experiments on Linux seem to show that in some
2292 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2293 To be on the safe side, however, I have now made the interface to
2294 host_find_byname() similar to host_find_bydns(), with an argument
2295 containing the DNS resolver options. The host_find_byname() function now
2296 sets these options at its start, just as host_find_bydns() does. The smtp
2297 transport options dns_qualify_single and dns_search_parents are passed to
2298 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2299 of host_find_byname() use the default settings of RES_DEFNAMES
2300 (qualify_single) but not RES_DNSRCH (search_parents).
2302 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2303 spool_read_header() do less string testing, by means of a preliminary
2304 switch on the second character of optional "-foo" lines. (This is
2305 overdue, caused by the large number of possibilities that now exist.
2306 Originally there were few.) While I was there, I also converted the
2307 str(n)cmp tests so they don't re-test the leading "-" and the first
2308 character, in the hope this might squeeze out yet more improvement.
2310 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2311 flag allowing group syntax was set by the header_syntax check but not
2312 turned off, possible causing trouble later; (2) The flag was not being
2313 set at all for the header_verify test, causing "group"-style headers to
2314 be rejected. I have now set it in this case, and also caused header_
2315 verify to ignore an empty address taken from a group. While doing this, I
2316 came across some other cases where the code for allowing group syntax
2317 while scanning a header line wasn't quite right (mostly, not resetting
2318 the flag correctly in the right place). These bugs could have caused
2319 trouble for malformed header lines. I hope it is now all correct.
2321 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2322 with the "reply" argument non-NULL. The code, however (which originally
2323 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2324 but it didn't always do it. This confused somebody who was copying the
2325 code for some other use. I have removed all the tests.
2327 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2328 feature that was used to support insecure browsers during the U.S. crypto
2329 embargo. It requires special client support, and Exim is probably the
2330 only MTA that supported it -- and would never use it because real RSA is
2331 always available. This code has been removed, because it had the bad
2332 effect of slowing Exim down by computing (never used) parameters for the
2333 RSA_EXPORT functionality.
2335 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2336 authenticator to fail if there's a tab character in the incoming data
2337 (there should never be unless someone is messing about, as it's supposed
2338 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2339 if the connection is using TLS or if the remote IP is the same as the
2340 local IP, and the "valid-client-cert option" if a client certificate has
2343 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2344 authenticators. This can be used for authorization after authentication
2345 succeeds. (In the case of plaintext, it servers for both authentication
2348 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2349 if any retry times were supplied.
2351 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2352 connection, where there is no client IP address to check. In this
2353 situation, the verify now always succeeds.
2355 PH/25 Applied John Jetmore's -Mset patch.
2357 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2359 PH/27 In a string expansion for a processed (not raw) header when multiple
2360 headers of the same name were present, leading whitespace was being
2361 removed from all of them, but trailing whitespace was being removed only
2362 from the last one. Now trailing whitespace is removed from each header
2363 before concatenation. Completely empty headers in a concatenation (as
2364 before) are ignored.
2366 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2367 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2369 PH/29 [Removed. This was a change that I later backed out, and forgot to
2370 correct the ChangeLog entry (that I had efficiently created) before
2371 committing the later change.]
2373 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2374 address errors (4xx response to RCPT) over the same connection as other
2375 messages routed to the same hosts. Such deliveries are always "forced",
2376 so retry times are not inspected. This resulted in far too many retries
2377 for the affected addresses. The effect occurred only when there were more
2378 hosts than the hosts_max_try setting in the smtp transport when it had
2379 the 4xx errors. Those hosts that it had tried were not added to the list
2380 of hosts for which the message was waiting, so if all were tried, there
2381 was no problem. Two fixes have been applied:
2383 (i) If there are any address or message errors in an SMTP delivery, none
2384 of the hosts (tried or untried) are now added to the list of hosts
2385 for which the message is waiting, so the message should not be a
2386 candidate for sending over the same connection that was used for a
2387 successful delivery of some other message. This seems entirely
2388 reasonable: after all the message is NOT "waiting for some host".
2389 This is so "obvious" that I'm not sure why it wasn't done
2390 previously. Hope I haven't missed anything, but it can't do any
2391 harm, as the worst effect is to miss an optimization.
2393 (ii) If, despite (i), such a delivery is accidentally attempted, the
2394 routing retry time is respected, so at least it doesn't keep
2395 hammering the server.
2397 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2398 in ${readsocket because some servers need this prod.
2400 PH/32 Added some extra debug output when updating a wait-xxx database.
2402 PH/33 The hint "could be header name not terminated by colon", which has been
2403 given for certain expansion errors for a long time, was not being given
2404 for the ${if def:h_colon_omitted{... case.
2406 PH/34 The spec says: "With one important exception, whenever a domain list is
2407 being scanned, $domain contains the subject domain." There was at least
2408 one case where this was not true.
2410 PH/35 The error "getsockname() failed: connection reset by peer" was being
2411 written to the panic log as well as the main log, but it isn't really
2412 panic-worthy as it just means the connection died rather early on. I have
2413 removed the panic log writing for the ECONNRESET error when getsockname()
2416 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2417 runs only) independently of the message's sender address. This meant
2418 that, if the 4xx error was in fact related to the sender, a different
2419 message to the same recipient with a different sender could confuse
2420 things. In particualar, this can happen when sending to a greylisting
2421 server, but other circumstances could also provoke similar problems.
2422 I have changed the default so that the retry time for these errors is now
2423 based a combination of the sender and recipient addresses. This change
2424 can be overridden by setting address_retry_include_sender=false in the
2427 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2428 remote server are returned as part of bounce messages. This was not
2429 happening for LMTP over a pipe (the lmtp transport), but now it is the
2430 same for both kinds of LMTP.
2432 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2433 in header lines that were in fact CNAMEs. This is no longer the case.
2435 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2436 and queue runs started by the daemon processed all messages. This has
2437 been fixed so that -R and -S can now usefully be given with -q<time>.
2439 PH/40 Import PCRE release 6.7 (fixes some bugs).
2441 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2443 PH/42 Give an error if -q is specified more than once.
2445 PH/43 Renamed the variables $interface_address and $interface_port as
2446 $received_ip_address and $received_port, to make it clear that these
2447 values apply to message reception, and not to the outgoing interface when
2448 a message is delivered. (The old names remain recognized, of course.)
2450 PH/44 There was no timeout on the connect() call when using a Unix domain
2451 socket in the ${readsocket expansion. There now is.
2453 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2454 be meaningful with "accept".
2456 SC/01 Eximstats V1.43
2457 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2459 SC/02 Eximstats V1.44
2460 Use a glob alias rather than an array ref in the generated
2461 parser. This improves both readability and performance.
2463 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2464 Collect SpamAssassin and rejection statistics.
2465 Don't display local sender or destination tables unless
2466 there is data to show.
2467 Added average volumes into the top table text output.
2469 SC/04 Eximstats V1.46
2470 Collect data on the number of addresses (recipients)
2471 as well as the number of messages.
2473 SC/05 Eximstats V1.47
2474 Added 'Message too big' to the list of mail rejection
2475 reasons (thanks to Marco Gaiarin).
2477 SC/06 Eximstats V1.48
2478 Mainlog lines which have GMT offsets and are too short to
2479 have a flag are now skipped.
2481 SC/07 Eximstats V1.49 (Alain Williams)
2482 Added the -emptyok flag.
2484 SC/08 Eximstats V1.50
2485 Fixes for obtaining the IP address from reject messages.
2487 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2488 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2489 whitesspace changes from 4.64-PH/27
2491 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2494 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2495 are found, allow negative numbers in numeric criteria)
2497 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2499 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2500 to match changes made in 4.64-PH/43
2502 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2504 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2505 "domain" is actually an IP address, and force a failure. This locks out
2506 those revolvers/nameservers that support "A-for-A" lookups, in
2507 contravention of the specifications.
2509 PH/48 When a host name was looked up from an IP address, and the subsequent
2510 forward lookup of the name timed out, the host name was left in
2511 $sender_host_name, contrary to the specification.
2513 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2514 restricted to single-key lookups, Exim was not diagnosing an error if
2515 * or *@ was used with a query-style lookup.
2517 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2519 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2520 long ago, but noone interested enough thought of it. Let's just say that
2521 the "1.1" means that there are some new functions that weren't there at
2522 some point in the past.
2524 PH/51 Error processing for expansion failure of helo_data from an smtp
2525 transport during callout processing was broken.
2527 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2528 tested/used via the -bh/-bhc/-bs options.
2530 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2531 bug, fixed in subsequent PCRE releases).
2533 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2534 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2536 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2542 SC/01 Use a glob alias rather than an array ref in eximstats generated
2543 parser. This improves both readability and performance.
2545 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2546 Don't display local sender or destination tables in eximstats unless
2547 there is data to show.
2548 Added average volumes into the eximstats top table text output.
2550 SC/03 Collect data on the number of addresses (recipients) as well
2551 as the number of messages in eximstats.
2553 TF/01 Correct an error in the documentation for the redirect router. Exim
2554 does (usually) call initgroups() when daemonizing.
2556 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2557 with consistent privilege compared to when running as a daemon.
2559 TF/03 Note in the spec that $authenticated_id is not set for local
2560 submissions from trusted users.
2562 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2563 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2565 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2566 by adding some example configuration directives to the default
2567 configuration file. A little bit of work is required to uncomment the
2568 directives and define how usernames and passwords are checked, but
2569 there is now a framework to start from.
2571 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2572 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2573 without this. I don't know how relevant this is to other LDAP libraries.
2575 PH/02 Add the verb name to the "unknown ACL verb" error.
2577 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2579 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2581 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2582 directory not expanded when it should be if an expanded home directory
2583 was set for the address (which is overridden by the transport).
2585 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2588 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2589 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2590 because it is too late at that time, and has no effect.
2592 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2593 security issue with \' (bugzilla #107). I could not use the
2594 PQescapeStringConn() function, because it needs a PGconn value as one of
2597 PH/08 When testing addresses using -bt, indicate those final addresses that
2598 are duplicates that would not cause an additional delivery. At least one
2599 person was confused, thinking that -bt output corresponded to deliveries.
2600 (Suppressing duplicates isn't a good idea as you lose the information
2601 about possibly different redirections that led to the duplicates.)
2603 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2604 systems where poll() doesn't work, in particular OS X.
2606 PH/10 Added more information to debugging output for retry time not reached.
2608 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2609 operations in malware.c.
2611 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2614 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2615 syslog_duplication set false, log lines that would normally be written
2616 both the the main log and to the reject log were not written to syslog at
2619 PH/14 In the default configuration, change the use of "message" in ACL warn
2620 statements to "add_header".
2622 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2623 not followed by a command (e.g. "seen endif").
2625 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2626 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2629 PH/17 Added extra conditions to the default value of delay_warning_condition
2633 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2634 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2635 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2638 The Auto-Submitted: and various List- headers are standardised, whereas I
2639 don't think Precedence: ever was.
2641 PH/18 Refactored debugging code in route_finduser() to show more information,
2642 in particular, the error code if getpwnam() issues one.
2644 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2645 This is apparently needed in addition to the PH/07 change above to avoid
2646 any possible encoding problems.
2648 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2649 but not after initializing Perl.
2651 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2652 output them only if debugging. By default they are written stderr,
2653 apparently, which is not desirable.
2655 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2658 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2661 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2663 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2664 authenticated or an ident call has been made. Suppress the default
2665 values for $authenticated_id and $authenticated_sender (but permit -oMai
2666 and -oMas) when testing with -bh.
2668 PH/24 Re-jigged the order of the tests in the default configuration so that the
2669 tests for valid domains and recipients precede the DNS black list and CSA
2670 tests, on the grounds that those ones are more expensive.
2672 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2673 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2674 This bug exists in every version of Exim that I still have, right back to
2677 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2678 However, an attempt to turn on case-sensitivity in a regex key by
2679 including (?-i) didn't work because the subject string was already
2680 lowercased, and the effects were non-intuitive. It turns out that a
2681 one-line patch can be used to allow (?-i) to work as expected.
2687 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2688 other effects) broke the use of negated acl sub-conditions.
2690 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2693 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2694 "Deny" causes Exim to reject the incoming connection with a 554 error.
2695 Unfortunately, if there is a major crisis, such as a disk failure,
2696 tcp-wrappers gives "deny", whereas what one would like would be some
2697 kind of temporary error. A kludge has been added to help with this.
2698 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2699 554 error is used if errno is still zero or contains ENOENT (which occurs
2700 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2703 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2705 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2706 errors. Otherwise a message that provokes a temporary error (when other
2707 messages do not) can cause a whole host to time out.
2709 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2710 addresses were routed directly to files or pipes from a redirect router.
2711 File deliveries just didn't batch; pipe deliveries might have suffered
2714 PH/06 A failure to get a lock for a hints database would erroneously always say
2715 "Failed to get write lock", even when it was really a read lock.
2717 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2718 of 0600. This has been changed to use the value of the lockfile_mode
2719 option (which defaults to 0600).
2721 PH/08 Applied small patch from the Sieve maintainer.
2723 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2724 folder from quota calculations, a direct delivery into this folder messed
2725 up the contents of the maildirsize file. This was because the regex was
2726 used only to exclude .Trash (or whatever) when the size of the mailbox
2727 was calculated. There was no check that a delivery was happening into an
2728 excluded directory. This bug has been fixed by ignoring all quota
2729 processing for deliveries into excluded directories.
2731 PH/10 Added the maildirfolder_create_regex option to appendfile.
2737 PH/01 The code for finding all the local interface addresses on a FreeBSD
2738 system running IPv6 was broken. This may well have applied to all BSD
2739 systems, as well as to others that have similar system calls. The broken
2740 code found IPv4 interfaces correctly, but gave incorrect values for the
2741 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2742 that it would not match correctly against @[] and not recognize the IPv6
2745 PH/02 The ipliteral router was not recognizing addresses of the form user@
2746 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2748 PH/03 Added disable_ipv6.
2750 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2751 decoded form, because it is most often used to construct To: headers
2752 lines in autoreplies, and the decoded form may well be syntactically
2753 invalid. However, $reply_address has leading white space removed, and all
2754 newlines turned into spaces so that the autoreply transport does not
2757 PH/05 If group was specified without a user on a router, and no group or user
2758 was specified on a transport, the group from the router was ignored.
2760 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2761 for visible compile-time settings that can be used to change these
2762 numbers, for those that want even more. Backwards compatibility with old
2763 spool files has been maintained. However, going back to a previous Exim
2764 release will lost any variables that are in spool files.
2766 PH/07 Two small changes when running in the test harness: increase delay when
2767 passing a TCP/IP connection to a new process, in case the original
2768 process has to generate a bounce, and remove special handling of
2769 127.0.0.2 (sic), which is no longer necessary.
2771 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2772 be the same on different OS.
2774 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2777 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2778 whether --show-vars was specified or not
2780 JJ/02 exipick: Added support for new ACL variable spool format introduced
2783 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2784 syntactically invalid From: or Reply-to: line, and a filter used this to
2785 generate an autoreply, and therefore failed to obtain an address for the
2786 autoreply, Exim could try to deliver to a non-existent relative file
2787 name, causing unrelated and misleading errors. What now happens is that
2788 it logs this as a hard delivery error, but does not attempt to create a
2791 PH/11 The exinext utility has a -C option for testing purposes, but although
2792 the given file was scanned by exinext itself; it wasn't being passed on
2793 when Exim was called.
2795 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2796 an end-of-file indication when reading a command response.
2798 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2799 compiled. In many other places in Exim, IPv6 addresses are always
2800 recognized, so I have changed this. It also means that IPv4 domain
2801 literals of the form [IPV4:n.n.n.n] are now always recognized.
2803 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2804 used if the router is not running as root, for example, when verifying at
2805 ACL time, or when using -bh. The debugging output from this situation was
2806 non-existent - all you got was a failure to exec. I have made two
2809 (a) Failures to set uid/gid, the current directory, or a process leader
2810 in a subprocess such as that created by queryprogram now generate
2811 suitable debugging ouput when -d is set.
2813 (b) The queryprogram router detects when it is not running as root,
2814 outputs suitable debugging information if -d is set, and then runs
2815 the subprocess without attempting to change uid/gid.
2817 PH/15 Minor change to Makefile for building test_host (undocumented testing
2820 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2821 additional section of a DNS packet that returns MX or SRV records.
2822 Instead, it always explicitly searches for A/AAAA records. This avoids
2823 major problems that occur when a DNS server includes only records of one
2824 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2825 fixed another bug: if SRV records were looked up and the corresponding
2826 address records were *not* found in the additional section, the port
2827 values from the SRV records were lost.
2829 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2830 using the correct key (the original address) when searching the retry
2831 rules in order to find which one to use for generating the retry hint.
2833 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2834 adding the default one. Similarly, if it contains a Reply-To: header, the
2835 errors_reply_to option, if set, is not used.
2837 PH/19 When calculating a retry time, Exim used to measure the "time since
2838 failure" by looking at the "first failed" field in the retry record. Now
2839 it does not use this if it is later than than the arrival time of the
2840 message. Instead it uses the arrival time. This makes for better
2841 behaviour in cases where some deliveries succeed, thus re-setting the
2842 "first failed" field. An example is a quota failure for a huge message
2843 when small messages continue to be delivered. Without this change, the
2844 "time since failure" will always be short, possible causing more frequent
2845 delivery attempts for the huge message than are intended.
2846 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2848 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2849 $1, $2, $3) because the numerical variables can be reset during some
2850 expansion items (e.g. "match"), thereby losing the authentication data.
2852 PH/21 Make -bV show the size of off_t variables so that the test suite can
2853 decide whether to run tests for quotas > 2G.
2855 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2856 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2857 filecount value is greater than 2G or if a quota value is greater than 2G
2858 on a system where the size of off_t is not greater than 4, a panic error
2861 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2862 never match. The debug and -bh output now contains an explicit error
2863 message indicating a malformed IPv4 address or mask.
2865 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2866 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2867 PH/23 above applies.
2869 PH/25 Do not write to syslog when running in the test harness. The only
2870 occasion when this arises is a failure to open the main or panic logs
2871 (for which there is an explicit test).
2873 PH/26 Added the /no_tell option to "control=freeze".
2875 PH/27 If a host name lookup failed very early in a connection, for example, if
2876 the IP address matched host_lookup and the reverse lookup yielded a name
2877 that did not have a forward lookup, an error message of the form "no IP
2878 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2879 could be logged. Now it outputs the IP address instead of "NULL".
2881 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2882 allows the sender and the authenticated sender to be set when
2883 submitting a message from within Exim. Since child_open_exim() is
2884 documented for local_scan(), the new function should be too.
2886 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2887 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2888 results in an empty string is now treated as unset.
2890 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2892 PH/31 Added sender_verify_fail logging option.
2894 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2895 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2896 tidied the source and removed it altogether.
2898 PH/33 When a queue run was abandoned because the load average was too high, a
2899 log line was always written; now it is written only if the queue_run log
2900 selector is set. In addition, the log line for abandonment now contains
2901 information about the queue run such as the pid. This is always present
2902 in "start" and "stop" lines but was omitted from the "abandon" line.
2904 PH/34 Omit spaces between a header name and the colon in the error message that
2905 is given when verify = headers_syntax fails (if there are lots of them,
2906 the message gets confusing).
2908 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2909 names, as there are now some PTR records that contain slashes. This check
2910 is only to protect against broken name servers that fall over on strange
2911 characters, so the fact that it applies to all lookups doesn't matter.
2913 PH/36 Now that the new test suite is complete, we can remove some of the
2914 special code in Exim that was needed for the old test suite. For example,
2915 sorting DNS records because real resolvers return them in an arbitrary
2916 order. The new test suite's fake resolver always returns records in the
2919 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2920 bounces) except when queue_only is set, to avoid logging races between
2921 the different processes.
2923 PH/38 Panic-die if .include specifies a non-absolute path.
2925 PH/39 A tweak to the "H" retry rule from its user.
2927 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2928 a label. They prevented compilation on older perls.
2930 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2931 a warning to be raised on newish perls.
2933 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2934 on queue. Changes to match documented behaviour of showing count of
2935 messages matching specified criteria.
2937 PH/40 Changed the default ident timeout from 30s to 5s.
2939 PH/41 Added support for the use of login_cap features, on those BSD systems
2940 that have them, for controlling the resources used by pipe deliveries.
2942 PH/42 The content-scanning code uses fopen() to create files in which to put
2943 message data. Previously it was not paying any attention to the mode of
2944 the files. Exim runs with umask(0) because the rest of the code creates
2945 files with open(), and sets the required mode explicitly. Thus, these
2946 files were ending up world-writeable. This was not a big issue, because,
2947 being within the spool directory, they were not world-accessible. I have
2948 created a function called modefopen, which takes an additional mode
2949 argument. It sets umask(777), creates the file, chmods it to the required
2950 mode, then resets the umask. All the relevant calls to fopen() in the
2951 content scanning code have been changed to use this function.
2953 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2954 to 24 hours. This avoids potential overflow problems when processing G
2955 and H retry rules. I suspect nobody ever tinkers with this value.
2957 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2959 PH/45 When the plaintext authenticator is running as a client, the server's
2960 challenges are checked to ensure they are valid base64 strings. By
2961 default, the authentication attempt is cancelled if an invalid string is
2962 received. Setting client_ignore_invalid_base64 true ignores these errors.
2963 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2964 they are received. Thus, the responses can be made to depend on the
2965 challenges. If an invalid string is ignored, an empty string is placed in
2968 PH/46 Messages that are created by the autoreply transport now contains a
2969 References: header, in accordance with RFCs 2822 and 3834.
2971 PH/47 Added authenticated_sender_force to the smtp transport.
2973 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2975 PH/49 Installed latest patch from the Sieve maintainer.
2977 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2978 was also set, the appendfile transport was unnecessarily scanning a
2979 directory of message files (e.g. for maildir delivery) to find the count
2980 of files (along with the size), even though it did not need this
2981 information. It now does the scan only if it needs to find either the
2982 size of the count of files.
2984 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2986 PH/52 Two bugs concerned with error handling when the smtp transport is
2989 (i) Exim was not creating retry information for temporary errors given
2990 for individual recipients after the DATA command when the smtp transport
2991 was used in LMTP mode. This meant that they could be retried too
2992 frequently, and not timed out correctly.
2994 (ii) Exim was setting the flag that allows error details to be returned
2995 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2996 recipients that were returned after the DATA command.
2998 PH/53 This is related to PH/52, but is more general: for any failing address,
2999 when detailed error information was permitted to be returned to the
3000 sender, but the error was temporary, then after the final timeout, only
3001 "retry timeout exceeded" was returned. Now it returns the full error as
3002 well as "retry timeout exceeded".
3004 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3005 do this, and (what is worse) MTAs that accept it.
3007 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3008 will now be deprecated.
3010 PH/56 New os.c-cygwin from the Cygwin maintainer.
3012 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3013 formats (previously only available in exim formats via -bpr, -bpru,
3014 and -bpra. Now also available in native and exiqgrep formats)
3016 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3017 with very large, slow to parse queues
3019 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3021 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3023 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3024 responses to authentication challenges, though it was showing the
3025 challenges; (ii) I've removed the CR characters from the debug output for
3028 PH/58 Allow for the insertion of a newline as well as a space when a string
3029 is turned into more than one encoded-word during RFC 2047 encoding. The
3030 Sieve code now uses this.
3032 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3033 data_4xx, lost_connection, tls_required.
3035 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3036 message was being sent as an SMTP response.
3038 PH/61 Add -l and -k options to exicyclog.
3040 PH/62 When verifying, if an address was redirected to one new address, so that
3041 verification continued, and the new address failed or deferred after
3042 having set something in $address_data, the value of $address_data was not
3043 passed back to the ACL. This was different to the case when no
3044 redirection occurred. The value is now passed back in both cases.
3046 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3047 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3048 use login_cap.h, so on its own it isn't the distinguishing feature. The
3049 new name refers directly to the setclassresources() function.
3051 PH/65 Added configuration files for NetBSD3.
3053 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3055 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3056 is preferred over IPv4.
3058 PH/68 The bounce_return_message and bounce_return_body options were not being
3059 honoured for bounces generated during the reception of non-SMTP messages.
3060 In particular, this applied to messages rejected by the ACL. This bug has
3061 been fixed. However, if bounce_return_message is true and bounce_return_
3062 body is false, the headers that are returned for a non-SMTP message
3063 include only those that have been read before the error was detected.
3064 (In the case of an ACL rejection, they have all been read.)
3066 PH/69 The HTML version of the specification is now built in a directory called
3067 spec_html instead of spec.html, because the latter looks like a path with
3068 a MIME-type, and this confuses some software.
3070 PH/70 Catch two compiler warnings in sieve.c.
3072 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3073 function verify_get_ident() calls ip_connect() to connect a socket, but
3074 if the "connect()" function timed out, ip_connect() used to close the
3075 socket. However, verify_get_ident() also closes the socket later, and in
3076 between Exim writes to the log, which may get opened at this point. When
3077 the socket was closed in ip_connect(), the log could get the same file
3078 descriptor number as the socket. This naturally causes chaos. The fix is
3079 not to close the socket in ip_connect(); the socket should be closed by
3080 the function that creates it. There was only one place in the code where
3081 this was missing, in the iplookup router, which I don't think anybody now
3082 uses, but I've fixed it anyway.
3084 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3085 well as to direct DNS lookups. Otherwise the handling of names in host
3086 lists is inconsistent and therefore confusing.
3092 PH/01 Two changes to the default runtime configuration:
3094 (1) Move the checks for relay_from_hosts and authenticated clients from
3095 after to before the (commented out) DNS black list checks.
3097 (2) Add control=submission to the relay_from_hosts and authenticated
3098 clients checks, on the grounds that messages accepted by these
3099 statements are most likely to be submissions.
3101 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3103 (1) Generate an error if the third argument for the ${prvs expansion is
3106 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3109 (3) Reset the variables that are obtained from the first argument of
3110 ${prvscheck and used in the second argument before leaving the code,
3111 because their memory is reclaimed, so using them afterwards may do
3114 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3115 one (it's much easier than Tom thought :-).
3117 (5) Because of (4), we can now allow for the use of $prvscheck_result
3118 inside the third argument.
3120 PH/03 For some reason, the default setting of PATH when running a command from
3121 a pipe transport was just "/usr/bin". I have changed it to
3124 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3125 anything to be listed in the output from -bV.
3127 PH/05 When a filter generated an autoreply, the entire To: header line was
3128 quoted in the delivery log line, like this:
3130 => >A.N.Other <ano@some.domain> <original@ddress> ...
3132 This has been changed so that it extracts the operative address. There
3133 may be more than one such address. If so, they are comma-separated, like
3136 => >ano@some.domain,ona@other.domain <original@ddress> ...
3138 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3139 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3140 not being looked up in the rDNS to get a host name, Exim was showing the
3141 IP address twice in Received: lines, even though the IP addresses were
3142 identical. For example:
3144 Received: from [1.2.3.4] (helo=[1.2.3.4])
3146 However, if the real host name was known, it was omitting the HELO data
3147 if it matched the actual IP address. This has been tidied up so that it
3148 doesn't show the same IP address twice.
3150 PH/07 When both +timestamp and +memory debugging was on, the value given by
3151 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3152 called by the debug printing, thereby overwriting the timestamp buffer.
3153 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3155 PH/08 When the original message was included in an autoreply transport, it
3156 always said "this is a copy of the message, including all the headers",
3157 even if body_only or headers_only was set. It now gives an appropriate
3160 PH/09 Applied a patch from the Sieve maintainer which:
3162 o fixes some comments
3163 o adds the (disabled) notify extension core
3164 o adds some debug output for the result of if/elsif tests
3165 o points to the current vacation draft in the documentation
3166 and documents the missing references header update
3170 o fixes a bug in processing the envelope test (when testing
3171 multiple envelope elements, the last element determinted the
3174 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3175 Electronic Mail") by including:
3177 Auto-submitted: auto-generated
3179 in the messages that it generates (bounce messages and others, such as
3180 warnings). In the case of bounce messages for non-SMTP mesages, there was
3181 also a typo: it was using "Auto_submitted" (underscore instead of
3182 hyphen). Since every message generated by Exim is necessarily in response
3183 to another message, thes have all been changed to:
3185 Auto-Submitted: auto-replied
3187 in accordance with these statements in the RFC:
3189 The auto-replied keyword:
3191 - SHOULD be used on messages sent in direct response to another
3192 message by an automatic process,
3194 - MUST NOT be used on manually-generated messages,
3196 - MAY be used on Delivery Status Notifications (DSNs) and Message
3197 Disposition Notifications (MDNs),
3199 - MUST NOT be used on messages generated by automatic or periodic
3200 processes, except for messages which are automatic responses to
3203 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3204 to the default Received: header definition.
3206 PH/12 Added log selector acl_warn_skipped (default on).
3208 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3209 variables because (a) they are in the wrong storage pool and (b) even if
3210 they were copied, it wouldn't work properly because of the caching.
3212 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3213 checking when decoding. Apparently there are clients that generate
3214 overlong encoded strings. Why am I not surprised?
3216 PH/15 If the first argument of "${if match_address" was not empty, but did not
3217 contain an "@" character, Exim crashed. Now it writes a panic log message
3218 and treats the condition as false.
3220 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3222 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3223 extension "envelope-auth". The code is finished and in agreement with
3224 other implementations, but there is no documentation so far and in fact,
3225 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3226 not changing the active code.
3228 Print executed "if" and "elsif" statements when debugging is used. This
3229 helps a great deal to understand what a filter does.
3231 Document more things not specified clearly in RFC3028. I had all this
3232 sorted out, when out of a sudden new issues came to my mind. Oops."
3234 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3237 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3238 canonical form (as documented). However, after a host name lookup from
3239 the IP address, check_host() was doing a simple string comparison with
3240 addresses acquired from the DNS when checking that the found name did
3241 have the original IP as one of its addresses. Since any found IPv6
3242 addresses are likely to be in abbreviated form, the comparison could
3243 fail. Luckily, there already exists a function for doing the comparison
3244 by converting both addresses to binary, so now that is used instead of
3245 the text comparison.
3247 PH/20 There was another similar case to PH/19, when a complete host name was
3248 given in a host list; looking up its IP address could give an abbreviated
3249 form, whereas the current host's name might or might not be abbreviated.
3250 The same fix has been applied.
3256 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3257 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3260 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3261 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3263 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3265 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3266 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3267 Also, for "Auto-Submitted", treat anything other than "no" as
3268 non-personal, in accordance with RFC 3834. (Previously it treated
3269 anything starting "auto-" as non-personal.)
3271 TF/01 The control=submission/name=... option had a problem with syntax
3272 errors if the name included a slash character. The /name= option
3273 now slurps the rest of the string, so it can include any characters
3274 but it must come last in the list of options (after /sender_retain
3277 PH/05 Some modifications to the interface to the fake nameserver for the new
3285 TK/01 Added the "success_on_redirect" address verification option. See
3286 NewStuff for rationale and an example.
3288 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3290 PH/02 Patch to exigrep to allow it to work on syslog lines.
3292 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3293 fread() to skip over the body file's header line, because in Cygwin the
3294 header line is locked and is inaccessible.
3296 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3297 co-exist for some time) to make it clear that it is the Exim ID that is
3298 referenced, not the Message-ID: header line.
3300 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3301 string_format() function, because snprintf() does not exist on all
3304 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3305 ${stat: expansion item.
3307 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3308 protocol synchronization error", to keep the pedants happy.
3310 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3311 well as for IRIX systems, when gcc is being used. See the host.c source
3314 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3316 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3319 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3320 transport and to the smtp transport in LMTP mode.
3322 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3324 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3325 run a filter in a subprocess. This could lead to confusion in subsequent
3326 lookups in the parent process. There should also be a search_tidyup() at
3327 the end of the subprocess.
3329 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3330 only if the host matched helo_try_verify_hosts, which caused the
3331 verification to occur when the EHLO/HELO command was issued. The ACL just
3332 tested the remembered result. Now, if a previous verification attempt has
3333 not happened, "verify = helo" does it there and then.
3335 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3337 TK/03 Fix log output including CR from clamd.
3339 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3340 exist provoked a memory error which could cause a segfault.
3342 PH/15 Installed PCRE 6.2
3344 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3346 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3347 of the problem. Specifically, suggested +O2 rather than +O1 for the
3350 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3352 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3353 record, the port was not correctly logged when the outgoing_port log
3354 selector was set (it logged the transort's default port).
3356 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3357 fallback_hosts, and "hosts" in the smtp transport.
3359 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3360 host errors such as "Connection refused".
3362 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3363 authentication with radiusclient 0.4.9:
3365 - Error returned from rc_read_config was caught wrongly
3366 - Username/password not passed on to radius server due to wrong length.
3368 The presumption is that some radiusclient API changes for 4.51/PH/17
3369 were not taken care of correctly. The code is still untested by me (my
3370 Linux distribution still has 0.3.2 of radiusclient), but it was
3371 contributed by a Radius user.
3373 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3374 expanding the "port" option of the smtp transport.
3376 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3377 while reading a MIME header. Thanks to Tom Hughes for a patch.
3379 PH/24 Include config.h inside local_scan.h so that configuration settings are
3382 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3383 that in an ACL for RCPT (for example), you can examine exactly what was
3386 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3387 commands, but it was not correctly comparing the address with the actual
3388 client host address. Thus, it would show the EHLO address in Received:
3389 header lines when this was not necessary.
3391 PH/27 Added the % operator to ${eval:}.
3393 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3394 it should be ignoring failures (because with -C, for example, it has lost
3395 privilege). It wasn't ignoring creation failures other than "already
3398 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3401 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3402 because an input line was too long, either on its own, or by virtue of
3403 too many continuations, the temporary file was not being removed, and the
3404 return code was incorrect.
3406 PH/31 Missing "BOOL" in function definition in filtertest.c.
3408 PH/32 Applied Sieve patches from the maintainer.
3410 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3412 PH/33 Added "verify = not_blind".
3414 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3415 Local/Makefile (with some defaults set). These are used in built scripts
3416 such as exicyclog, but they have never been used in the exim_install
3417 script (though there are many overriding facilities there). I have
3418 arranged that the exim_install script now takes note of these two
3421 PH/35 Installed configuration files for Dragonfly.
3423 PH/36 When a locally submitted message by a trusted user did not contain a
3424 From: header, and the sender address was obtained from -f or from an SMTP
3425 MAIL command, and the trusted user did not use -F to supply a sender
3426 name, $originator_name was incorrectly used when constructing a From:
3427 header. Furthermore, $originator_name was used for submission mode
3428 messages from external hosts without From: headers in a similar way,
3429 which is clearly wrong.
3431 PH/37 Added control=suppress_local_fixups.
3433 PH/38 When log_selector = +received_sender was set, and the addition of the
3434 sender made the log line's construction buffer exactly full, or one byte
3435 less than full, an overflow happened when the terminating "\n" was
3438 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3439 when the result of a list match is failure because a DNS lookup failed.
3441 PH/40 RM_COMMAND is now used in the building process.
3443 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3444 the "build-* directories that it finds.
3446 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3447 address in a domain literal was a prefix of an interface address.
3449 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3450 when verifying a sender address, unless rewrite_headers is false.
3452 PH/44 Wrote a long comment about why errors_to addresses are verified as
3453 recipients, not senders.
3455 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3456 the ratelimit ACL was added.
3458 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3460 PH/46 Added extra information about PostgreSQL errors to the error string.
3462 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3463 avoiding the need to install special zones in a real server. This is
3464 backwards compatible; if it can't find the fake resolver, it drops back.
3465 Thus, both old and new test suites can be run.
3467 TF/02 Added util/ratelimit.pl
3469 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3470 clock is set back in time.
3472 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3473 Candler <B.Candler@pobox.com>.
3475 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3476 OK for addresses that are the result of redirections.
3478 PH/48 A number of further additions for the benefit of the new test suite,
3479 including a fake gethostbyname() that interfaces to the fake DNS resolver
3482 TF/06 The fix for widen_domains has also been applied to qualify_single and
3483 search_parents which are the other dnslookup options that can cause
3486 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3489 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3491 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3492 service" if it encountered an MX record with an empty target hostname.
3493 The message is now "an MX or SRV record indicated no SMTP service".
3495 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3496 if the DNS of the sending site is misconfigured. This is quite a
3497 common situation. This change restores the behaviour of treating a
3498 helo verification defer as a failure.
3500 PH/51 If self=fail was set on a router, the bounce message did not include the
3501 actual error message.
3507 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3509 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3510 command itself ended in error, the underlying message about the transport
3511 filter timeout was being overwritten with the pipe command error. Now the
3512 underlying error message should be appended to the second error message.
3514 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3516 PH/02 Reduce the amount of output that "make" produces by default. Full output
3517 can still be requested.
3519 PH/03 The warning log line about a condition test deferring for a "warn" verb
3520 was being output only once per connection, rather than after each
3521 occurrence (because it was using the same function as for successful
3522 "warn" verbs). This seems wrong, so I have changed it.
3524 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3525 it should not have, which might have caused a crash in the right
3526 circumstances, but probably never did.
3528 PH/04 Installed a modified version of Tony Finch's patch to make submission
3529 mode fix the return path as well as the Sender: header line, and to
3530 add a /name= option so that you can make the user's friendly name appear
3533 TF/03 Added the control = fakedefer ACL modifier.
3535 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3536 Mark Lowes for thorough testing.
3538 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3540 TK/03 Merged latest SRS patch from Miles Wilton.
3542 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3543 with the definition in sysexits.h (which is #included earlier).
3544 Fortunately, Exim does not actually use EX_OK. The code used to try to
3545 preserve the sysexits.h value, by assumimg that macro definitions were
3546 scanned for macro replacements. I have been disabused of this notion,
3547 so now the code just undefines EX_OK before #including unistd.h.
3549 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3550 in the smtp transport. When a block could not be written in a single
3551 write() function, the timeout was being re-applied to each part-write.
3552 This seems wrong - if the receiver was accepting one byte at a time it
3553 would take for ever. The timeout is now adjusted when this happens. It
3554 doesn't have to be particularly precise.
3556 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3557 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3559 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3560 without a domain if the check to <postmaster@domain> fails.
3562 SC/01 Eximstats: added -xls and the ability to specify output files
3563 (patch written by Frank Heydlauf).
3565 SC/02 Eximstats: use FileHandles for outputing results.
3567 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3569 SC/04 Eximstats: fixed display of large numbers with -nvr option
3571 SC/05 Eximstats: fixed merging of reports with empty tables.
3573 SC/06 Eximstats: added the -include_original_destination flag
3575 SC/07 Eximstats: removed tabs and trailing whitespace.
3577 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3579 TK/06 MBOX spool code: Add real "From " MBOX separator line
3580 so the .eml file is really in mbox format (even though
3581 most programs do not really care). Patch from Alex Miller.
3583 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3584 The latter is generated from $received_to and is only set if the
3585 message has one envelope recipient. SA can use these headers,
3586 obviously out-of-the-box. Patch from Alex Miller.
3588 PH/08 The ${def test on a variable was returning false if the variable's
3589 value was "0", contrary to what the specification has always said!
3590 The result should be true unless the variable is empty.
3592 PH/09 The syntax error of a character other than { following "${if
3593 def:variable_name" (after optional whitespace) was not being diagnosed.
3594 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3595 accidental colon was present, for example, could give incorrect results.
3597 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3598 result is used (not including appendfile, where other changes are about
3601 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3602 This involved changing a lot of size variables from int to off_t. It
3603 should work with maildirs and everything.
3605 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3606 spamd dying while we are connected to it.
3608 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3611 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3612 function for BDB 4.3.
3614 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3616 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3617 the sources for PCRE have been re-arranged and more files are now
3620 PH/15 The code I had for printing potentially long long variables in PH/11
3621 above was not the best (it lost precision). The length of off_t variables
3622 is now inspected at build time, and an appropriate printing format (%ld
3623 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3624 to be "long long int" or "long int". This is needed for the internal
3625 formatting function string_vformat().
3627 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3628 the configuration file to be ":syslog", then the script "guesses" where
3629 the logs files are, rather than using the compiled in default. In our
3630 case the guess is not the same as the compiled default, so the script
3631 suddenly stopped working when I started to use syslog. The patch checks
3632 to see if log_file_path is "". If so, it attempts to read it from exim
3633 with no configuration file to get the compiled in version, before it
3634 falls back to the previous guessing code."
3636 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3637 implementing BATV in an Exim configuration. See NewStuff for the gory
3640 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3641 Makefile that are specific to HP-UX.
3643 PH/18 If the "use_postmaster" option was set for a recipient callout together
3644 with the "random" option, the postmaster address was used as the MAIL
3645 FROM address for the random test, but not for the subsequent recipient
3646 test. It is now used for both.
3648 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3649 patch removes a few documentation additions to RFC 3028, because the
3650 latest draft now contains them. It adds the new en;ascii-case comparator
3651 and a new error check for 8bit text in MIME parts. Comparator and
3652 require names are now matched exactly. I enabled the subaddress
3653 extension, but it is not well tested yet (read: it works for me)."
3655 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3656 rework some of the code of TK/09 above to avoid the hardwired use of
3657 "%lld" and "long long". Replaced the call to snprintf() with a call to
3660 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3661 records point to non-existent hosts", "retry timeout exceeded", and
3662 "retry time not reached for any host after a long failure period".
3664 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3665 experimental DomainKeys support:
3667 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3668 (2) On an error such as an illegally used "control", the wrong name for
3669 the control was given.
3671 These problems did NOT occur unless DomainKeys support was compiled.
3673 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3675 PH/24 Added ${if match_ip condition.
3677 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3678 databases so that it will be absolutely obvious if a crash occurs in the
3679 DB library. This is a regular occurrence (often caused by mis-matched
3682 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3683 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3684 picked up on a user's system that detects such things. There doesn't seem
3685 to be a gcc warning option for this - only an attribute that has to be
3686 put on the function's prototype. It seems that in Fedora Core 4 they have
3687 set this on a number of new functions. No doubt there will be more in due
3690 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3691 specify a transport. However, if an address that was verified by such a
3692 router was the subject of a callout, Exim crashed because it tried to
3693 read the rcpt_include_affixes from the non-existent transport. Now it
3694 just assumes that the setting of that option is false. This bug was
3695 introduced by 4.51/PH/31.
3697 PH/28 Changed -d+all to exclude +memory, because that information is very
3698 rarely of interest, but it makes the output a lot bigger. People tend to
3699 do -d+all out of habit.
3701 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3702 code in os-type was giving problems when libc.so lives in lib64, like on
3705 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3706 aren't the modern standard, and it seems that some systems' include files
3707 don't always have them. Exim was already checking for some of the newer
3708 ones like T_AAAA, and defining it itself. I've added checks for all the
3709 record types that Exim uses.
3711 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3712 not automatically generating a new one, as it is supposed to. This
3713 prevented TLS from working. If the file did exist, but contained invalid
3714 data, a new version was generated, as expected. It was only the case of a
3715 non-existent file that was broken.
3717 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3718 with a change in libdomainkeys > 0.64.
3720 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3721 from DNS. If the selector record carries the flag, it now has
3722 precedence over the domain-wide flag.
3724 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3726 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3727 the use of a port name that isn't defined in /etc/services) occurred, the
3728 message was deferred as in a normal delivery, and thus remained on the
3729 spool, instead of being failed because of the mua_wrapper setting. This
3730 is now fixed, and I tidied up some of the mua_wrapper messages at the
3733 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3734 the messages in a hash of arrays rather than using individual hashes.
3735 This is a bit cleaner and results in dramatic memory savings, albeit
3736 at a slight CPU cost.
3738 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3739 as requested by Marc Sherman.
3741 SC/10 Eximstats: added histograms for user specified patterns as requested
3744 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3746 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3747 fopen() in the content-scanning modules that did not already have it.
3753 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3754 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3756 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3758 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3760 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3761 to test Sieve filters that use "vacation".
3763 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3764 that changes the way the GnuTLS parameters are stored in the cache file.
3765 The new format can be generated externally. For backward compatibility,
3766 if the data in the cache doesn't make sense, Exim assumes it has read an
3767 old-format file, and it generates new data and writes a new file. This
3768 means that you can't go back to an older release without removing the
3771 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3772 work if there are any delivery delays because "one_time" forces the
3773 parent to be marked "delivered", so its unseen clone is never tried
3774 again. For this reason, Exim now forbids the simultaneous setting of
3777 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3778 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3779 entry if you want to know the details. The fix, however, neglected to
3780 consider the case when local delivery batching is involved. The test for
3781 "previously delivered" was not happening when checking to see if an
3782 address could be batched with a previous (undelivered) one; under
3783 certain circumstances this could lead to multiple deliveries to the same
3786 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3787 in its include files, and this causes problems building Exim.
3789 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3790 header_syntax) but Exim was just ignoring anything given after a slash.
3791 In particular, this caused confusion with an attempt to use "verify =
3792 reverse_host_lookup/defer_ok". An error is now given when options are
3793 supplied for verify items that do not have them. (Maybe reverse_host_
3794 lookup should have a defer_ok option, but that's a different point.)
3796 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3797 defined by RFC 821) to 2048, because there were problems with some AUTH
3798 commands, and RFC 1869 says the size should be increased for extended
3799 SMTP commands that take arguments.
3801 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3804 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3805 "unknown" error; now it says that the functionality isn't in the binary.
3807 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3808 an address' error message when a string expansion fails (syntax or
3809 whatever). Otherwise the password may appear in the log. Following change
3810 PH/42 below, there is no longer a chance of it appearing in a bounce
3813 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3815 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3816 of its addresses was ever tried. (Bugzilla bug #2.)
3818 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3819 the result incorrectly in the debug output. (It correctly added a newline
3820 to what was transported.)
3822 TF/01 Added $received_time.
3824 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3825 commented out examples of how to interface to a virus scanner and to
3826 SpamAssassin. Also added commented examples of av_scanner and
3827 spamd_address settings.
3829 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3830 and controls are allowed in which ACLs. There were a couple of minor
3831 errors. Some of the entries in the conditions table (which is a table of
3832 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3833 negation of where the condition IS allowed.
3835 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3837 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3838 header file does not have a version number, so I've had to invent a new
3839 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3840 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3841 radiusclient), but it was contributed by a Radius user.
3843 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3844 files or directories, for OpenSSL.
3846 PH/19 When an Exim process that is running as root has to create an Exim log
3847 file, it does so in a subprocess that runs as exim:exim so as to get the
3848 ownership right at creation (otherwise, other Exim processes might see
3849 the file with the wrong ownership). There was no test for failure of this
3850 fork() call, which would lead to the process getting stuck as it waited
3851 for a non-existent subprocess. Forks do occasionally fail when resources
3852 run out. I reviewed all the other calls to fork(); they all seem to check
3855 PH/20 When checking for unexpected SMTP input at connect time (before writing
3856 the banner), Exim was not dealing correctly with a non-positive return
3857 from the read() function. If the client had disconnected by this time,
3858 the result was a log entry for a synchronization error with an empty
3859 string after "input=" when read() returned zero. If read() returned -1
3860 (an event I could not check), uninitialized data bytes were printed.
3861 There were reports of junk text (parts of files, etc) appearing after
3864 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3866 PH/22 Added support for macro redefinition, and (re)definition in between
3867 driver and ACL definitions.
3869 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3870 forgetting to use the resulting value; it was using the unexpanded value.
3872 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3873 hadn't been configured. The fix is from Juergen Kreileder, who
3874 understands it better than I do:
3876 "Here's what I see happening with three configured cyrus_sasl
3877 authenticators configured (plain, login, cram-md5):
3879 On startup auth_cyrus_sasl_init() gets called for each of these.
3880 This means three calls to sasl_listmech() without a specified mech_list.
3881 => SASL tests which mechs of all available mechs actually work
3882 => three warnings about OTP not working
3883 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3885 With the patch, sasl_listmech() also gets called three times. But now
3886 SASL's mech_list option is set to the server_mech specified in the the
3887 authenticator. Or in other words, the answer from sasl_listmech()
3888 gets limited to just the mech you're testing for (which is different
3890 => the return list contains just 'plain' or 'login', 'cram-md5' or
3891 nothing depending on the value of ob->server_mech.
3893 I've just tested the patch: Authentication still works fine,
3894 unavailable mechs specified in the exim configuration are still
3895 caught, and the auth.log warnings about OTP are gone."
3897 PH/25 When debugging is enabled, the contents of the command line are added
3898 to the debugging output, even when log_selector=+arguments is not
3901 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3902 answer is "GNU", and only if the return is "GNU/something" is the answer
3905 PH/27 $acl_verify_message is now set immediately after the failure of a
3906 verification in an ACL, and so is available in subsequent modifiers. In
3907 particular, the message can be preserved by coding like this:
3909 warn !verify = sender
3910 set acl_m0 = $acl_verify_message
3912 Previously, $acl_verify_message was set only while expanding "message"
3913 and "log_message" when a very denied access.
3915 PH/28 Modified OS/os.c-Linux with
3917 -#ifndef OS_LOAD_AVERAGE
3918 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3920 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3921 nomenclature these days.)
3923 PH/29 Installed patch from the Sieve maintainer that adds the options
3924 sieve_useraddress and sieve_subaddress to the redirect router.
3926 PH/30 In these circumstances:
3927 . Two addresses routed to the same list of hosts;
3928 . First host does not offer TLS;
3929 . First host accepts first address;
3930 . First host gives temporary error to second address;
3931 . Second host offers TLS and a TLS session is established;
3932 . Second host accepts second address.
3933 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3934 and peerdn, if requested) that were in fact used only for the second
3937 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3938 attention to any local part prefix or suffix that was matched by the
3939 router that accepted the address. It now behaves in the same way as it
3940 does for delivery: the affixes are removed from the local part unless
3941 rcpt_include_affixes is set on the transport.
3943 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3944 timeout during the DATA phase of an incoming message.
3946 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3947 applied a patch sanctioned by the Sieve maintainer.
3949 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3950 the uid or gid is negative. A case of a negative gid caused this to be
3951 noticed. The fix allows for either to be negative.
3953 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3954 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3957 PH/36 The change PH/12 above was broken. Fixed it.
3959 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3960 the grounds that routing the same address twice would always produce the
3961 same answer. This might have been true once, but it is certainly no
3962 longer true now. Routing a child address may depend on the previous
3963 routing that produced that child. Some complicated redirection strategies
3964 went wrong when messages had multiple recipients, and made Exim's
3965 behaviour dependent on the order in which the addresses were given.
3967 I have moved the duplicate checking until after the routing is complete.
3968 Exim scans the addresses that are assigned to local and remote
3969 transports, and removes any duplicates. This means that more work will be
3970 done, as duplicates will always all be routed, but duplicates are
3971 presumably rare, so I don't expect this is of any significance.
3973 For deliveries to pipes, files, and autoreplies, the duplicate checking
3974 still happens during the routing process, since they are not going to be
3977 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3978 It corrects a timeout issue with spamd. This is Ian's comment: "The
3979 background is that sometimes spamd either never reads data from a
3980 connection it has accepted, or it never writes response data. The exiscan
3981 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3982 blindly assumes that writes won't block so it may never time out."
3984 PH/39 Allow G after quota size as well as K and M.
3986 PH/40 The value set for $authenticated_id in an authenticator may not contain
3987 binary zeroes or newlines because the value is written to log lines and
3988 to spool files. There was no check on this. Now the value is run through
3989 the string_printing() function so that such characters are converted to
3990 printable escape sequences.
3992 PH/41 $message_linecount is a new variable that contains the total number of
3993 lines in the message. Compare $body_linecount, which is the count for the
3996 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3997 bounce and delay warning messages, except in certain special cases, which
4000 (a) An SMTP error message from a remote host;
4001 (b) A message specified in a :fail: redirection;
4002 (c) A message specified in a "fail" command in a system filter;
4003 (d) A message specified in a FAIL return from the queryprogram router;
4004 (e) A message specified by the cannot_route_message router option.
4006 In these cases only, Exim does include the error details in bounce and
4007 warning messages. There are also a few cases where bland messages such
4008 as "unrouteable address" or "local delivery error" are given.
4010 PH/43 $value is now also set for the "else" part of a ${run expansion.
4012 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4013 being worked on, but at least Exim now implements the latest version to
4016 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4017 process to complete was treated as a delivery failure, a timeout while
4018 writing the message to the pipe was logged, but erroneously treated as a
4019 successful delivery. Such timeouts include transport filter timeouts. For
4020 consistency with the overall process timeout, these timeouts are now
4021 treated as errors, giving rise to delivery failures by default. However,
4022 there is now a new Boolean option for the pipe transport called
4023 timeout_defer, which, if set TRUE, converts the failures into defers for
4024 both kinds of timeout. A transport filter timeout is now identified in
4027 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4028 systems where "make" and "gmake" are different, calling "gmake" at top
4029 level broke things. I've arranged for the value of $(MAKE) to be passed
4030 from the Makefile to this script so that it can call the same version of
4034 A note about Exim versions 4.44 and 4.50
4035 ----------------------------------------
4037 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4038 changes of various kinds. As a consequence, a big documentation update was
4039 needed. This delayed the release for rather longer than seemed good, especially
4040 in the light of a couple of (minor) security issues. Therefore, the changes
4041 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4042 release. So 4.44 and 4.50 are in effect two different branches that both start
4045 I have left the 4.50 change log unchanged; it contains all the changes since
4046 4.43. The change log for 4.44 is below; many of its items are identical to
4047 those for 4.50. This seems to be the most sensible way to preserve the
4048 historical information.
4054 1. Minor wording change to the doc/README.SIEVE file.
4056 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4057 computation of the current number of files was incorrect.
4059 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4060 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4063 4. Give more explanation in the error message when the command for a transport
4064 filter fails to execute.
4066 5. There are several places where Exim runs a non-Exim command in a
4067 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4068 was being done only for the command run by the queryprogram router. It is
4069 now done for all such subprocesses. The other cases are: ${run, transport
4070 filters, and the commands run by the lmtp and pipe transports.
4072 6. Added CONFIGURE_GROUP build-time option.
4074 7. Some older OS have a limit of 256 on the maximum number of file
4075 descriptors. Exim was using setrlimit() to set 1000 as a large value
4076 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4077 systems. I've change it so that if it can't get 1000, it tries for 256.
4079 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4080 was an oversight, and furthermore, ever since the addition of extra
4081 controls (e.g. 4.43/32), the checks on when to allow different forms of
4082 "control" were broken. There should now be diagnostics for all cases when a
4083 control that does not make sense is encountered.
4085 9. Added the /retain_sender option to "control=submission".
4087 10. $recipients is now available in the predata ACL (oversight).
4089 11. Tidy the search cache before the fork to do a delivery from a message
4090 received from the command line. Otherwise the child will trigger a lookup
4091 failure and thereby defer the delivery if it tries to use (for example) a
4092 cached ldap connection that the parent has called unbind on.
4094 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4095 of $address_data from the recipient verification was clobbered by the
4096 sender verification.
4098 13. The value of address_data from a sender verification is now available in
4099 $sender_address_data in subsequent conditions in the ACL statement.
4101 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4103 15. Added a new option "connect=<time>" to callout options, to set a different
4106 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4107 was its contents. (It was OK if the option was not defined at all.)
4109 17. A "Completed" log line is now written for messages that are removed from
4110 the spool by the -Mrm option.
4112 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4113 information about exactly what failed.
4115 19. Added -dd to debug only the daemon process.
4117 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4118 handles timeouts, both on the server side and network timeouts. Renamed the
4119 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4121 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4122 It is now set to "smtps".
4124 22. $host_address is now set to the target address during the checking of
4125 ignore_target_hosts.
4127 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4128 being passed; this would have caused $sender_host_name to have been used if
4129 matching the list had actually called for a host name (not very likely,
4130 since this list is usually IP addresses). A host name is now passed as
4133 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4134 code that specifies a non-restarting handler (typically sigaction() in
4135 modern systems) in an attempt to fix a rare and obscure crash bug.
4137 25. Narrowed the window for a race in the daemon that could cause it to ignore
4138 SIGCHLD signals. This is not a major problem, because they are used only to
4139 wake it up if nothing else does.
4141 26. A malformed maildirsize file could cause Exim to calculate negative values
4142 for the mailbox size or file count. Odd effects could occur as a result.
4143 The maildirsize information is now recalculated if the size or filecount
4146 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4147 support for a long time. Removed HAVE_SYS_VFS_H.
4149 28. Installed the latest version of exipick from John Jetmore.
4151 29. In an address list, if the pattern was not a regular expression, an empty
4152 subject address (from a bounce message) matched only if the pattern was an
4153 empty string. Non-empty patterns were not even tested. This was the wrong
4154 because it is perfectly reasonable to use an empty address as part of a
4155 database query. An empty address is now tested by patterns that are
4156 lookups. However, all the other forms of pattern expect the subject to
4157 contain a local part and a domain, and therefore, for them, an empty
4158 address still always fails if the pattern is not itself empty.
4160 30. Exim went into a mad DNS loop when attempting to do a callout where the
4161 host was specified on an smtp transport, and looking it up yielded more
4162 than one IP address.
4164 31. Re-factored the code for checking spool and log partition space into a
4165 function that finds that data and another that does the check. The former
4166 is then used to implement four new variables: $spool_space, $log_space,
4167 $spool_inodes, and $log_inodes.
4169 32. The RFC2047 encoding function was originally intended for short strings
4170 such as real names; it was not keeping to the 75-character limit for
4171 encoded words that the RFC imposes. It now respects the limit, and
4172 generates multiple encoded words if necessary. To be on the safe side, I
4173 have increased the buffer size for the ${rfc2047: expansion operator from
4176 33. It is now permitted to omit both strings after an "if" condition; if the
4177 condition is true, the result is "true". As before, when the second string
4178 is omitted, a false condition yields an empty string. This makes it less
4179 cumbersome to write custom ACL and router conditions.
4181 34. Failure to deliver a bounce message always caused it to be frozen, even if
4182 there was an errors_to setting on the router. The errors_to setting is now
4185 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4186 canonical form (fully expanded) before being placed in
4187 $sender_host_address.
4189 36. The table in the code that translates DNS record types into text (T_A to
4190 "A" for instance) was missing entries for NS and CNAME. It is just possible
4191 that this could have caused confusion if both these types were looked up
4192 for the same domain, because the text type is used as part of Exim's
4193 per-process caching. But the chance of anyone hitting this buglet seems
4196 37. The dnsdb lookup has been extended in a number of ways.
4198 (1) There is a new type, "zns", which walks up the domain tree until it
4199 finds some nameserver records. It should be used with care.
4201 (2) There is a new type, "mxh", which is like "mx" except that it returns
4202 just the host names, not the priorities.
4204 (3) It is now possible to give a list of domains (or IP addresses) to be
4205 looked up. The behaviour when one of the lookups defers can be
4206 controlled by a keyword.
4208 (4) It is now possible to specify the separator character for use when
4209 multiple records are returned.
4211 38. The dnslists ACL condition has been extended: it is now possible to supply
4212 a list of IP addresses and/or domains to be looked up in a particular DNS
4215 39. Added log_selector=+queue_time_overall.
4217 40. When running the queue in the test harness, wait just a tad after forking a
4218 delivery process, to get repeatability of debugging output.
4220 41. Include certificate and key file names in error message when GnuTLS fails
4221 to set them up, because the GnuTLS error message doesn't include the name
4222 of the failing file when there is a problem reading it.
4224 42. Allow both -bf and -bF in the same test run.
4226 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4228 44. The "Exiscan patch" is now merged into the mainline Exim source.
4230 45. Sometimes the final signoff response after QUIT could fail to get
4231 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4232 < 0 before doing a fflush(). This bug looks as though it goes back to the
4233 introduction of TLS in release 3.20, but "sometimes" must have been rare
4234 because the tests only now provoked it.
4236 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4237 (this can affect the format of dates).
4239 47. exim_tidydb, when checking for the continued existence of a message for
4240 which it has found a message-specific retry record, was not finding
4241 messages that were in split spool directories. Consequently, it was
4242 deleting retry records that should have stayed in existence.
4244 48. Steve fixed some bugs in eximstats.
4246 49. The SPA authentication driver was not abandoning authentication and moving
4247 on to the next authenticator when an expansion was forced to fail,
4248 contradicting the general specification for all authenticators. Instead it
4249 was generating a temporary error. It now behaves as specified.
4251 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4252 (the order specifies the preference for clients). The order is now AES256,
4253 AES128, 3DES, ARCFOUR128.
4255 51. Small patch to Sieve code - explicitly set From: when generating an
4258 52. Exim crashed if a remote delivery caused a very long error message to be
4259 recorded - for instance if somebody sent an entire SpamAssassin report back
4260 as a large number of 550 error lines. This bug was coincidentally fixed by
4261 increasing the size of one of Exim's internal buffers (big_buffer) that
4262 happened as part of the Exiscan merge. However, to be on the safe side, I
4263 have made the code more robust (and fixed the comments that describe what
4266 53. Now that there can be additional text after "Completed" in log lines (if
4267 the queue_time_overall log selector is set), a one-byte patch to exigrep
4268 was needed to allow it to recognize "Completed" as not the last thing in
4271 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4272 patch that reportedly fixes this has been added. I am not expert enough to
4273 create a test for it. This is what the patch creator wrote:
4275 "I found a little strange behaviour of ldap code when working with
4276 Windows 2003 AD Domain, where users was placed in more than one
4277 Organization Units. When I tried to give exim partial DN, the exit code
4278 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4279 But simultaneously result of request was absolutely normal ldap result,
4280 so I produce this patch..."
4282 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4283 REFERENCE, so I have modified the code to exclude the patch when that macro
4286 55. Some experimental protocols are using DNS PTR records for new purposes. The
4287 keys for these records are domain names, not reversed IP addresses. The
4288 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4289 leaves it alone. Component reversal etc. now happens only for IP addresses.
4292 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4294 57. Double the size of the debug message buffer (to 2048) so that more of very
4295 long debug lines gets shown.
4297 58. The exicyclog utility now does better if the number of log files to keep
4298 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4300 59. Two changes related to the smtp_active_hostname option:
4302 (1) $smtp_active_hostname is now available as a variable.
4303 (2) The default for smtp_banner uses $smtp_active_hostname instead
4304 of $primary_hostname.
4306 60. The host_aton() function is supposed to be passed a string that is known
4307 to be a valid IP address. However, in the case of IPv6 addresses, it was
4308 not checking this. This is a hostage to fortune. Exim now panics and dies
4309 if the condition is not met. A case was found where this could be provoked
4310 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4311 components; fortuitously, this particular loophole had already been fixed
4312 by change 4.50/55 above.
4314 If there are any other similar loopholes, the new check in host_aton()
4315 itself should stop them being exploited. The report I received stated that
4316 data on the command line could provoke the exploit when Exim was running as
4317 exim, but did not say which command line option was involved. All I could
4318 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4319 running as the user.
4322 61. There was a buffer overflow vulnerability in the SPA authentication code
4323 (which came originally from the Samba project). I have added a test to the
4324 spa_base64_to_bits() function which I hope fixes it.
4327 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4328 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4330 63. The daemon start-up calls getloadavg() while still root for those OS that
4331 need the first call to be done as root, but it missed one case: when
4332 deliver_queue_load_max is set with deliver_drop_privilege. This is
4333 necessary for the benefit of the queue runner, because there is no re-exec
4334 when deliver_drop_privilege is set.
4336 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4337 This has been fixed.
4339 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4340 was in use, was not putting the data itself into the right store pool;
4341 consequently, it could be overwritten for a subsequent message in the same
4342 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4345 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4347 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4348 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4349 the function were treating the return as a boolean value, which happened to
4350 work because 0=false and not-0=true, but is not correct code.
4352 68. The host_aton() function was not handling scoped IPv6 addresses (those
4353 with, for example, "%eth0" on the end) correctly.
4355 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4356 negated items (that is, ~something) in unsigned ints. Some compilers
4357 apparently mutter when there is no cast.
4359 70. If an address verification called from an ACL failed, and did not produce a
4360 user-specific message (i.e. there was only a "system" message), nothing was
4361 put in $acl_verify_message. In this situation, it now puts the system
4364 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4365 session; change 4.31/43 added the unwanted input to the log line - except
4366 that it did not do this in the start of session case. It now does.
4368 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4369 This is wrong and can cause the other end to generate a synchronization
4370 error if it is another Exim or anything else that does the synchronization
4371 check. A QUIT command is no longer sent after a timeout.
4373 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4374 during host lookups.
4376 74. The defer_ok option of callout verification was not working if it was used
4377 when verifying addresses in header lines, that is, for this case:
4379 verify = header_sender/callout=defer_ok
4381 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4382 those file descriptors could be used for SMTP connections. If anything
4383 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4384 could be sent to the SMTP client, causing chaos. The daemon now opens
4385 stdin, stdout, and stderr to /dev/null when it puts itself into the
4388 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4389 log by default. The user can override this with suitable Perl magic.
4391 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4392 the log message when discard triggers, was not working for the DATA ACL or
4393 for the non-SMTP ACL.
4395 78. Error message wording change in sieve.c.
4397 79. If smtp_accept_max_per_host was set, the number of connections could be
4398 restricted to fewer than expected, because the daemon was trying to set up
4399 a new connection before checking whether the processes handling previous
4400 connections had finished. The check for completed processes is now done
4401 earlier. On busy systems, this bug wouldn't be noticed because something
4402 else would have woken the daemon, and it would have reaped the completed
4405 80. If a message was submitted locally by a user whose login name contained one
4406 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4407 It caused a spool format error. I have fixed the spool reading code. A
4408 related problem was that the "from" clause in the Received: line became
4409 illegal because of the space(s). It is now covered by ${quote_local_part.
4411 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4414 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4416 83. Patch from Sieve maintainer to fix unterminated string problem in
4417 "vacation" handling.
4419 84. Some minor changes to the Linux configuration files to help with other
4420 OS variants using glibc.
4422 85. One more patch for Sieve to update vacation handling to latest spec.
4425 ----------------------------------------------------
4426 See the note above about the 4.44 and 4.50 releases.
4427 ----------------------------------------------------
4433 1. Change 4.43/35 introduced a bug that caused file counts to be
4434 incorrectly computed when quota_filecount was set in an appendfile
4437 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4438 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4441 3. Give more explanation in the error message when the command for a transport
4442 filter fails to execute.
4444 4. There are several places where Exim runs a non-Exim command in a
4445 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4446 was being done only for the command run by the queryprogram router. It is
4447 now done for all such subprocesses. The other cases are: ${run, transport
4448 filters, and the commands run by the lmtp and pipe transports.
4450 5. Some older OS have a limit of 256 on the maximum number of file
4451 descriptors. Exim was using setrlimit() to set 1000 as a large value
4452 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4453 systems. I've change it so that if it can't get 1000, it tries for 256.
4455 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4456 was an oversight, and furthermore, ever since the addition of extra
4457 controls (e.g. 4.43/32), the checks on when to allow different forms of
4458 "control" were broken. There should now be diagnostics for all cases when a
4459 control that does not make sense is encountered.
4461 7. $recipients is now available in the predata ACL (oversight).
4463 8. Tidy the search cache before the fork to do a delivery from a message
4464 received from the command line. Otherwise the child will trigger a lookup
4465 failure and thereby defer the delivery if it tries to use (for example) a
4466 cached ldap connection that the parent has called unbind on.
4468 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4469 of $address_data from the recipient verification was clobbered by the
4470 sender verification.
4472 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4473 was its contents. (It was OK if the option was not defined at all.)
4475 11. A "Completed" log line is now written for messages that are removed from
4476 the spool by the -Mrm option.
4478 12. $host_address is now set to the target address during the checking of
4479 ignore_target_hosts.
4481 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4482 being passed; this would have caused $sender_host_name to have been used if
4483 matching the list had actually called for a host name (not very likely,
4484 since this list is usually IP addresses). A host name is now passed as
4487 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4488 code that specifies a non-restarting handler (typically sigaction() in
4489 modern systems) in an attempt to fix a rare and obscure crash bug.
4491 15. Narrowed the window for a race in the daemon that could cause it to ignore
4492 SIGCHLD signals. This is not a major problem, because they are used only to
4493 wake it up if nothing else does.
4495 16. A malformed maildirsize file could cause Exim to calculate negative values
4496 for the mailbox size or file count. Odd effects could occur as a result.
4497 The maildirsize information is now recalculated if the size or filecount
4500 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4501 support for a long time. Removed HAVE_SYS_VFS_H.
4503 18. Updated exipick to current release from John Jetmore.
4505 19. Allow an empty sender to be matched against a lookup in an address list.
4506 Previously the only cases considered were a regular expression, or an
4509 20. Exim went into a mad DNS lookup loop when doing a callout where the
4510 host was specified on the transport, if the DNS lookup yielded more than
4513 21. The RFC2047 encoding function was originally intended for short strings
4514 such as real names; it was not keeping to the 75-character limit for
4515 encoded words that the RFC imposes. It now respects the limit, and
4516 generates multiple encoded words if necessary. To be on the safe side, I
4517 have increased the buffer size for the ${rfc2047: expansion operator from
4520 22. Failure to deliver a bounce message always caused it to be frozen, even if
4521 there was an errors_to setting on the router. The errors_to setting is now
4524 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4525 canonical form (fully expanded) before being placed in
4526 $sender_host_address.
4528 24. Updated eximstats to version 1.33
4530 25. Include certificate and key file names in error message when GnuTLS fails
4531 to set them up, because the GnuTLS error message doesn't include the name
4532 of the failing file when there is a problem reading it.
4534 26. Expand error message when OpenSSL has problems setting up cert/key files.
4537 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4538 (this can affect the format of dates).
4540 28. exim_tidydb, when checking for the continued existence of a message for
4541 which it has found a message-specific retry record, was not finding
4542 messages that were in split spool directories. Consequently, it was
4543 deleting retry records that should have stayed in existence.
4545 29. eximstats updated to version 1.35
4546 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4547 1.35 - bugfix such that pie charts by volume are generated correctly
4549 30. The SPA authentication driver was not abandoning authentication and moving
4550 on to the next authenticator when an expansion was forced to fail,
4551 contradicting the general specification for all authenticators. Instead it
4552 was generating a temporary error. It now behaves as specified.
4554 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4555 (the order specifies the preference for clients). The order is now AES256,
4556 AES128, 3DES, ARCFOUR128.
4558 31. Small patch to Sieve code - explicitly set From: when generating an
4561 32. Exim crashed if a remote delivery caused a very long error message to be
4562 recorded - for instance if somebody sent an entire SpamAssassin report back
4563 as a large number of 550 error lines. This bug was coincidentally fixed by
4564 increasing the size of one of Exim's internal buffers (big_buffer) that
4565 happened as part of the Exiscan merge. However, to be on the safe side, I
4566 have made the code more robust (and fixed the comments that describe what
4569 33. Some experimental protocols are using DNS PTR records for new purposes. The
4570 keys for these records are domain names, not reversed IP addresses. The
4571 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4572 leaves it alone. Component reversal etc. now happens only for IP addresses.
4575 34. The host_aton() function is supposed to be passed a string that is known
4576 to be a valid IP address. However, in the case of IPv6 addresses, it was
4577 not checking this. This is a hostage to fortune. Exim now panics and dies
4578 if the condition is not met. A case was found where this could be provoked
4579 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4580 components; fortuitously, this particular loophole had already been fixed
4581 by change 4.50/55 or 4.44/33 above.
4583 If there are any other similar loopholes, the new check in host_aton()
4584 itself should stop them being exploited. The report I received stated that
4585 data on the command line could provoke the exploit when Exim was running as
4586 exim, but did not say which command line option was involved. All I could
4587 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4588 running as the user.
4591 35. There was a buffer overflow vulnerability in the SPA authentication code
4592 (which came originally from the Samba project). I have added a test to the
4593 spa_base64_to_bits() function which I hope fixes it.
4596 36. The daemon start-up calls getloadavg() while still root for those OS that
4597 need the first call to be done as root, but it missed one case: when
4598 deliver_queue_load_max is set with deliver_drop_privilege. This is
4599 necessary for the benefit of the queue runner, because there is no re-exec
4600 when deliver_drop_privilege is set.
4602 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4603 was in use, was not putting the data itself into the right store pool;
4604 consequently, it could be overwritten for a subsequent message in the same
4605 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4608 38. Sometimes the final signoff response after QUIT could fail to get
4609 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4610 < 0 before doing a fflush(). This bug looks as though it goes back to the
4611 introduction of TLS in release 3.20, but "sometimes" must have been rare
4612 because the tests only now provoked it.
4618 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4619 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4620 Now it returns an integer. A number of calls were still expecting a T/F
4621 return. Fortuitously, in all cases, the tests worked in OK situations,
4622 which is the norm. However, things would have gone wrong on any write
4623 failures on the smtp file descriptor. This function is used when sending
4624 messages over SMTP and also when doing verify callouts.
4626 2. When Exim is called to do synchronous delivery of a locally submitted
4627 message (the -odf or -odi options), it no longer closes stderr before doing
4630 3. Implemented the mua_wrapper option.
4632 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4634 5. Implemented the functions header_remove(), header_testname(),
4635 header_add_at_position(), and receive_remove_recipient(), and exported them
4638 6. If an ACL "warn" statement specified the addition of headers, Exim already
4639 inserted X-ACL-Warn: at the start if there was no header name. However, it
4640 was not making this test for the second and subsequent header lines if
4641 there were newlines in the string. This meant that an invalid header could
4642 be inserted if Exim was badly configured.
4644 7. Allow an ACL "warn" statement to add header lines at the start or after all
4645 the Received: headers, as well as at the end.
4647 8. Added the rcpt_4xx retry error code.
4649 9. Added postmaster_mailfrom=xxx to callout verification option.
4651 10. Added mailfrom=xxxx to the callout verification option, for verify=
4654 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4655 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4657 12. Inserted some casts to stop certain compilers warning when using pointer
4658 differences as field lengths or precisions in printf-type calls (mostly
4659 affecting debugging statements).
4661 13. Added optional readline() support for -be (dynamically loaded).
4663 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4664 same clock tick as a message's arrival, so that its received time was the
4665 same as the "first fail" time on the retry record, and that message
4666 remained on the queue past the ultimate address timeout, every queue runner
4667 would try a delivery (because it was past the ultimate address timeout) but
4668 after another failure, the ultimate address timeout, which should have then
4669 bounced the address, did not kick in. This was a "< instead of <=" error;
4670 in most cases the first failure would have been in the next clock tick
4671 after the received time, and all would be well.
4673 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4674 being recognized when the domain list was tested by the match_domain
4675 condition in an expansion string.
4677 16. Added the ${str2b64: operator.
4679 17. Exim was always calling setrlimit() to set a large limit for the number of
4680 processes, without checking whether the existing limit was already
4681 adequate. (It did check for the limit on file descriptors.) Furthermore,
4682 errors from getrlimit() and setrlimit() were being ignored. Now they are
4683 logged to the main and panic logs, but Exim does carry on, to try to do its
4684 job under whatever limits there are.
4686 18. Imported PCRE 5.0.
4688 19. Trivial typo in log message " temporarily refused connection" (the leading
4691 20. If the log selector return_path_on_delivery was set and an address was
4692 redirected to /dev/null, the delivery process crashed because it assumed
4693 that a return path would always be set for a "successful" delivery. In this
4694 case, the whole delivery is bypassed as an optimization, and therefore no
4697 21. Internal re-arrangement: the function for sending a challenge and reading
4698 a response while authentication was assuming a zero-terminated challenge
4699 string. It's now changed to take a pointer and a length, to allow for
4700 binary data in such strings.
4702 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4704 23. Exim was not respecting finduser_retries when seeking the login of the
4705 uid under which it was called; it was always trying 10 times. (The default
4706 setting of finduser_retries is zero.) Also, it was sleeping after the final
4707 failure, which is pointless.
4709 24. Implemented tls_on_connect_ports.
4711 25. Implemented acl_smtp_predata.
4713 26. If the domain in control=submission is set empty, Exim assumes that the
4714 authenticated id is a complete email address when it generates From: or
4715 Sender: header lines.
4717 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4718 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4719 chown and chgrp in /bin and hostname in /usr/bin.
4721 28. Exim was keeping the "process log" file open after each use, just as it
4722 does for the main log. This opens the possibility of it remaining open for
4723 long periods when the USR1 signal hits a daemon. Occasional processlog
4724 errors were reported, that could have been caused by this. Anyway, it seems
4725 much more sensible not to leave this file open at all, so that is what now
4728 29. The long-running daemon process does not normally write to the log once it
4729 has entered its main loop, and it closes the log before doing so. This is
4730 so that log files can straightforwardly be renamed and moved. However,
4731 there are a couple of unusual error situations where the daemon does write
4732 log entries, and I had neglected to close the log afterwards.
4734 30. The text of an SMTP error response that was received during a remote
4735 delivery was being truncated at 512 bytes. This is too short for some of
4736 the long messages that one sometimes sees. I've increased the limit to
4739 31. It is now possible to make retry rules that apply only when a message has a
4740 specific sender, in particular, an empty sender.
4742 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4743 it possible to be selective about when SMTP synchronization is enforced.
4745 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4747 32. Implemented hosts_connection_nolog.
4749 33. Added an ACL for QUIT.
4751 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4754 35. Added mailbox_size and mailbox_filecount to appendfile.
4756 36. Added control = no_multiline_responses to ACLs.
4758 37. There was a bug in the logic of the code that waits for the clock to tick
4759 in the case where the clock went backwards by a substantial amount such
4760 that the microsecond fraction of "now" was more than the microsecond
4761 fraction of "then" (but the whole seconds number was less).
4763 38. Added support for the libradius Radius client library this is found on
4764 FreeBSD (previously only the radiusclient library was supported).
4770 1. When certain lookups returned multiple values in the form name=value, the
4771 quoting of the values was not always being done properly. Specifically:
4772 (a) If the value started with a double quote, but contained no whitespace,
4774 (b) If the value contained whitespace other than a space character (i.e.
4775 tabs or newlines or carriage returns) it was not quoted.
4776 This fix has been applied to the mysql and pgsql lookups by writing a
4777 separate quoting function and calling it from the lookup code. The fix
4778 should probably also be applied to nisplus, ibase and oracle lookups, but
4779 since I cannot test any of those, I have not disturbed their existing code.
4781 2. A hit in the callout cache for a specific address caused a log line with no
4782 reason for rejecting RCPT. Now it says "Previous (cached) callout
4783 verification failure".
4785 3. There was an off-by-one bug in the queryprogram router. An over-long
4786 return line was truncated at 256 instead of 255 characters, thereby
4787 overflowing its buffer with the terminating zero. As well as fixing this, I
4788 have increased the buffer size to 1024 (and made a note to document this).
4790 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4791 when Exim is waiting for an SMTP response from a remote server, Exim
4792 restarts its select() call on the socket, thereby resetting its timeout.
4793 This is not a problem when such interrupts are rare. Somebody set up a cron
4794 job to run exiwhat every 2 minutes, which is less than the normal select()
4795 timeout (5 or 10 minutes). This meant that the select() timeout never
4796 kicked in because it was always reset. I have fixed this by comparing the
4797 time when an interrupt arrives with the time at the start of the first call
4798 to select(). If more time than the timeout has elapsed, the interrupt is
4799 treated as a timeout.
4801 5. Some internal re-factoring in preparation for the addition of Sieve
4802 extensions (by MH). In particular, the "personal" test is moved to a
4803 separate function, and given an option for scanning Cc: and Bcc: (which is
4804 not set for Exim filters).
4806 6. When Exim created an email address using the login of the caller as the
4807 local part (e.g. when creating a From: or Sender: header line), it was not
4808 quoting the local part when it contained special characters such as @.
4810 7. Installed new OpenBSD configuration files.
4812 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4813 try to make them clearer.
4815 9. Callout options, other than the timeout value, were being ignored when
4816 verifying sender addresses in header lines. For example, when using
4818 verify = header_sender/callout=no_cache
4820 the cache was (incorrectly) being used.
4822 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4823 only the Cygwin environment.
4825 11. When return_path_on_delivery was set as a log selector, if different remote
4826 addresses in the same message used different return paths and parallel
4827 remote delivery occurred, the wrong values would sometimes be logged.
4828 (Whenever a remote delivery process finished, the return path value from
4829 the most recently started remote delivery process was logged.)
4831 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4832 lines when AUTH and/or TLS are in use. This is the "received protocol"
4833 field. Exim used to use "asmtp" for authenticated SMTP, without any
4834 indication (in the protocol name) for TLS use. Now it follows the RFC and
4835 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4836 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4837 names appear in log lines as well as in Received: header lines.
4839 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4840 extensions, and comparison tests, and to fix some bugs.
4842 14. Changes to the "personal" filter test:
4844 (1) The test was buggy in that it was just doing the equivalent of
4845 "contains" tests on header lines. For example, if a user's address was
4846 anne@some.where, the "personal" test would incorrectly be true for
4848 To: susanne@some.where
4850 This test is now done by extracting each address from the header in turn,
4851 and checking the entire address. Other tests that are part of "personal"
4852 are now done using regular expressions (for example, to check local parts
4853 of addresses in From: header lines).
4855 (2) The list of non-personal local parts in From: addresses has been
4856 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4857 taken from the Sieve specification recommendations.
4859 (3) If the message contains any header line starting with "List-" it is
4860 treated as non-personal.
4862 (4) The test for "circular" in the Subject: header line has been removed
4863 because it now seems ill-conceived.
4865 15. Minor typos in src/EDITME comments corrected.
4867 16. Installed latest exipick from John Jetmore.
4869 17. If headers_add on a router specified a text string that was too long for
4870 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4871 of string_sprintf() is now avoided.
4873 18. $message_body_size was not set (it was always zero) when running the DATA
4874 ACL and the local_scan() function.
4876 19. For the "mail" command in an Exim filter, no default was being set for
4877 the once_repeat time, causing a random time value to be used if "once" was
4878 specified. (If the value happened to be <= 0, no repeat happened.) The
4879 default is now 0s, meaning "never repeat". The "vacation" command was OK
4880 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4881 (I found it when inspecting the code).
4883 20. There is now an overall timeout for performing a callout verification. It
4884 defaults to 4 times the callout timeout, which applies to individual SMTP
4885 commands during the callout. The overall timeout applies when there is more
4886 than one host that can be tried. The timeout is checked before trying the
4887 next host. This prevents very long delays if there are a large number of
4888 hosts and all are timing out (e.g. when the network connections are timing
4889 out). The value of the overall timeout can be changed by specifying an
4890 additional sub-option for "callout", called "maxwait". For example:
4892 verify = sender/callout=5s,maxwait=20s
4894 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4895 to the end before writing, but this should make it even safer).
4897 22. Exim was forgetting that it had advertised PIPELINING for the second and
4898 subsequent messages on an SMTP connection. It was also not resetting its
4899 memory on STARTTLS and an internal HELO.
4901 23. When Exim logs an SMTP synchronization error within a session, it now
4902 records whether PIPELINING has been advertised or not.
4904 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4905 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4906 rather than long int.
4908 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4910 26. Added the never_mail option to autoreply.
4916 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4917 crash if the getsockname() call failed; this can happen if a connection is
4918 closed very soon after it is established. The problem was simply in the
4919 order in which certain operations were done, causing Exim to try to write
4920 to the SMTP stream before it had set up the file descriptor. The bug has
4921 been fixed by making things happen in the correct order.
4927 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4928 before the connection was closed, thus losing the rejection response.
4930 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4931 some early Solaris releases, but causes trouble in current releases where
4932 socklen_t is defined.
4934 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4937 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4940 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4941 that releasing the top of it at the end releases what was used for sub-
4942 expansions (unless the block got too big). However, discard this block if
4943 the first thing is a variable or header, so that we can use its block when
4944 it is dynamic (useful for very large $message_headers, for example).
4946 6. Lookups now cache *every* query, not just the most recent. A new, separate
4947 store pool is used for this. It can be recovered when all lookup caches are
4948 flushed. Lookups now release memory at the end of their result strings.
4949 This has involved some general refactoring of the lookup sources.
4951 7. Some code has been added to the store_xxx() functions to reduce the amount
4952 of flapping under certain conditions.
4954 8. log_incoming_interface used to affect only the <= reception log lines. Now
4955 it causes the local interface and port to be added to several more SMTP log
4956 lines, for example "SMTP connection from", and rejection lines.
4958 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4960 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4962 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4963 could be overwritten at the end of the current message (or the start of a
4964 new message if it was set in a HELO ACL). The value is now preserved for
4965 the duration of the SMTP connection.
4967 12. If a transport had a headers_rewrite setting, and a matching header line
4968 contained an unqualified address, that address was qualified, even if it
4969 did not match any rewriting rules. The underlying bug was that the values
4970 of the flags that permit the existence of unqualified sender and recipient
4971 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4972 non-local messages, and by -bnq for local messages) were not being
4973 preserved with the message after it was received.
4975 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4976 "next input=" as part of the text comprising the host identity instead of
4977 the correct text. The code was using the same buffer for two different
4978 strings. However, depending on which order the printing function evaluated
4979 its arguments, the bug did not always show up. Under Linux, for example, my
4980 test suite worked just fine.
4982 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4983 doesn't work with some older versions of Perl. It has been changed to "my",
4984 which in any case is probably the better facility to use.
4986 15. A really picky compiler found some instances of statements for creating
4987 error messages that either had too many or two few arguments for the format
4990 16. The size of the buffer for calls to the DNS resolver has been increased
4991 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4992 for addresses that have a lot of PTR records. This alleviates a problem; it
4993 does not fully solve it.
4995 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4996 buffer now truncates the list and logs the incident, which is the same
4997 action as happens when Exim is looking up a host name and its aliases.
4998 Previously in this situation something unpredictable would happen;
4999 sometimes it was "internal error: store_reset failed".
5001 18. If a server dropped the connection unexpectedly when an Exim client was
5002 using GnuTLS and trying to read a response, the client delivery process
5003 crashed while trying to generate an error log message.
5005 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5006 string, for example:
5008 warn message = H1: something\nH2: something
5010 the text was added as a single header line from Exim's point of view
5011 though it ended up OK in the delivered message. However, searching for the
5012 second and subsequent header lines using $h_h2: did not work. This has been
5013 fixed. Similarly, if a system filter added multiple headers in this way,
5014 the routers could not see them.
5016 20. Expanded the error message when iplsearch is called with an invalid key to
5017 suggest using net-iplsearch in a host list.
5019 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5020 ACLs are no longer actually imposed (and a message to that effect is
5023 22. If a "gecos" field in a passwd entry contained escaped characters, in
5024 particular, if it contained a \" sequence, Exim got it wrong when building
5025 a From: or a Sender: header from that name. A second bug also caused
5026 incorrect handling when an unquoted " was present following a character
5027 that needed quoting.
5029 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5030 was not being matched caselessly.
5032 24. Arranged for all hyphens in the exim.8 source to be escaped with
5035 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5036 properly. Recipient callout cache records were still being keyed to include
5037 the sender, even when use_sender was set false. This led to far more
5038 callouts that were necessary. The sender is no longer included in the key
5039 when use_sender is false.
5041 26. Added "control = submission" modifier to ACLs.
5043 27. Added the ${base62d: operator to decode base 62 numbers.
5045 28. dnsdb lookups can now access SRV records.
5047 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5048 the configuration file.
5050 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5051 (-v) mode. This makes the output for a verbose queue run more intelligible.
5053 31. Added a use_postmaster feature to recipient callouts.
5055 32. Added the $body_zerocount variable, containing the number of binary zero
5056 bytes in the message body.
5058 33. The time of last modification of the "new" subdirectory is now used as the
5059 "mailbox time last read" when there is a quota error for a maildir
5062 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5064 35. Added +ignore_unknown as a special item in host lists.
5066 36. Code for decoding IPv6 addresses in host lists is now included, even if
5067 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5068 address was recognized as an IP address, but was then not correctly decoded
5069 into binary, causing unexpected and incorrect effects when compared with
5076 1. Very minor rewording of debugging text in manualroute to say "list of
5077 hosts" instead of "hostlist".
5079 2. If verify=header_syntax was set, and a header line with an unqualified
5080 address (no domain) and a large number of spaces between the end of the
5081 name and the colon was received, the reception process suffered a buffer
5082 overflow, and (when I tested it) crashed. This was caused by some obsolete
5083 code that should have been removed. The fix is to remove it!
5085 3. When running in the test harness, delay a bit after writing a bounce
5086 message to get a bit more predictability in the log output.
5088 4. Added a call to search_tidyup() just before forking a reception process. In
5089 theory, someone could use a lookup in the expansion of smtp_accept_max_
5090 per_host which, without the tidyup, could leave open a database connection.
5092 5. Added the variables $recipient_data and $sender_data which get set from a
5093 lookup success in an ACL "recipients" or "senders" condition, or a router
5094 "senders" option, similar to $domain_data and $local_part_data.
5096 6. Moved the writing of debug_print from before to after the "senders" test
5099 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5100 problems for message scanning, either using a data ACL, or using
5101 local_scan() because the Received: header was not generated till after they
5102 were called (in order to set the time as the time of reception completion).
5103 I have revised the way this works. The header is now generated after the
5104 body is received, but before the ACL or local_scan() are called. After they
5105 are run, the timestamp in the header is updated.
5111 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5112 before starting a queue runner without re-exec. This happened only when
5113 deliver_drop_privilege was set or when the Exim user was set to root. The
5114 effect of the bug was that timeouts during subsequent deliveries caused
5115 crashes instead of being properly handled. The handler is now left at its
5116 default (and expected) setting.
5118 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5119 message, again when deliver_drop_privilege is set or Exim is run as root.
5120 The bug described in (1) was not present in this case, but the tidying up
5121 of the other signals was missing. I have made the two cases consistent.
5123 3. The ignore_target_hosts setting on a manualroute router was being ignored
5124 for hosts that were looked up using the /MX notation.
5126 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5129 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5130 operated on the sender address. After changing the $sender_address to <>
5131 for the sender address verify, Exim was re-instated it as the original
5132 (before rewriting) address, but remembering that it had rewritten it, so it
5133 wasn't rewriting it again. This bug also had the effect of breaking the
5134 sender address verification caching when the sender address was rewritten.
5136 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5137 This has been changed so that if the ip literal address matches
5138 ignore_target_hosts, the router declines.
5140 7. Added expansion conditions match_domain, match_address, and match_local_
5141 part (NOT match_host).
5143 8. The placeholder for the Received: header didn't have a length field set.
5145 9. Added code to Exim itself and to exim_lock to test for a specific race
5146 condition that could lead to file corruption when using MBX delivery. The
5147 issue is with the lockfile that is created in /tmp. If this file is removed
5148 after a process has opened it but before that process has acquired a lock,
5149 there is the potential for a second process to recreate the file and also
5150 acquire a lock. This could lead to two Exim processes writing to the file
5151 at the same time. The added code performs the same test as UW imapd; it
5152 checks after acquiring the lock that its file descriptor still refers to
5153 the same named file.
5155 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5156 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5159 11. Added the smtp_active_hostname option. If used, this will typically be made
5160 to depend on the incoming interface address. Because $interface_address is
5161 not set up until the daemon has forked a reception process, error responses
5162 that can happen earlier (such as "too many connections") no longer contain
5165 12. If an expansion in a condition on a "warn" statement fails because a lookup
5166 defers, the "warn" statement is abandoned, and the next ACL statement is
5167 processed. Previously this caused the whole ACL to be aborted.
5169 13. Added the iplsearch lookup type.
5171 14. Added ident_timeout as a log selector.
5173 15. Added tls_certificate_verified as a log selector.
5175 16. Added a global option tls_require_ciphers (compare the smtp transport
5176 option of the same name). This controls incoming TLS connections.
5178 17. I finally figured out how to make tls_require_ciphers do a similar thing
5179 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5180 before starting the TLS session.
5182 18. Tabs are now shown as \t in -bP output.
5184 19. If the log selector return_path_on_delivery was set, Exim crashed when
5185 bouncing a message because it had too many Received: header lines.
5187 20. If two routers both had headers_remove settings, and the first one included
5188 a superfluous trailing colon, the final name in the first list and the
5189 first name in the second list were incorrectly joined into one item (with a
5190 colon in the middle).
5196 1. Added -C and -D options to the exinext utility, mainly to make it easier
5197 to include in the automated testing, but these could be helpful when
5198 multiple configurations are in use.
5200 2. The exinext utility was not formatting the output nicely when there was
5201 an alternate port involved in the retry record key, nor when there was a
5202 message id as well (for retries that were specific to a specific message
5203 and a specific host). It was also confused by IPv6 addresses, because of
5204 the additional colons they contain. I have fixed the IPv4 problem, and
5205 patched it up to do a reasonable job for IPv6.
5207 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5208 delivery, the log line now contains "pipelined" if PIPELINING was used.
5210 4. An SMTP transport process used to panic and die if the bind() call to set
5211 an explicit outgoing interface failed. This has been changed; it is now
5212 treated in the same way as a connect() failure.
5214 5. A reference to $sender_host_name in the part of a conditional expansion
5215 that was being skipped was still causing a DNS lookup. This no longer
5218 6. The def: expansion condition was not recognizing references to header lines
5219 that used bh_ and bheader_.
5221 7. Added the _cache feature to named lists.
5223 8. The code for checking quota_filecount in the appendfile transport was
5224 allowing one more file than it should have been.
5226 9. For compatibility with Sendmail, the command line option
5234 and sets the incoming protocol and host name (for trusted callers). The
5235 host name and its colon can be omitted when only the protocol is to be set.
5236 Note the Exim already has two private options, -pd and -ps, that refer to
5237 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5238 "s", but I don't think that's a major issue.
5240 10. A number of refactoring changes to the code, none of which should affect
5243 (a) The number of logging options was getting close to filling up the
5244 32-bit word that was used as a bit map. I have split them into two classes:
5245 those that are passed in the argument to log_write(), and those that are
5246 only ever tested independently outside of that function. These are now in
5247 separate 32-bit words, so there is plenty of room for expansion again.
5248 There is no change in the user interface or the logging behaviour.
5250 (b) When building, for example, log lines, the code previously used a
5251 macro that called string_cat() twice, in order to add two strings. This is
5252 not really sufficiently general. Furthermore, there was one instance where
5253 it was actually wrong because one of the argument was used twice, and in
5254 one call a function was used. (As it happened, calling the function twice
5255 did not affect the overall behaviour.) The macro has been replaced by a
5256 function that can join an arbitrary number of extra strings onto a growing
5259 (c) The code for expansion conditions now uses a table and a binary chop
5260 instead of a serial search (which was left over from when there were very
5261 few conditions). Also, it now recognizes conditions like "pam" even when
5262 the relevant support is not compiled in: a suitably worded error message is
5263 given if an attempt is made to use such a condition.
5265 11. Added ${time_interval:xxxxx}.
5267 12. A bug was causing one of the ddress fields not to be passed back correctly
5268 from remote delivery subprocesses. The field in question was not being
5269 subsequently used, so this caused to problems in practice.
5271 13. Added new log selectors queue_time and deliver_time.
5273 14. Might have fixed a bug in maildirsizefile handling that threw up
5274 "unexpected character" debug warnings, and recalculated the data
5275 unnecessarily. In any case, I expanded the warning message to give more
5278 15. Added the message "Restricted characters in address" to the statements in
5279 the default ACL that block characters like @ and % in local parts.
5281 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5282 Three changes have been made:
5284 (a) There was a serious bug; a negative response to MAIL caused the whole
5285 recipient domain to be cached as invalid, thereby blocking all messages
5286 to all local parts at the same domain, from all senders. This bug has
5287 been fixed. The domain is no longer cached after a negative response to
5288 MAIL if the sender used is not empty.
5290 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5293 (c) A new callout option, "use_sender" has been added for people who want
5294 the modified behaviour.
5300 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5303 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5304 indeed breaks things for older releases.
5306 3. Added additional logging to the case where there is a problem reading data
5307 from a filter that is running in a subprocess using a pipe, in order to
5308 try to track down a specific problem.
5310 4. Testing facility fudge: when running in the test harness and attempting
5311 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5312 getting "No route to host". Convert this to a timeout.
5314 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5317 6. Some OS don't have socklen_t but use size_t instead. This affects the
5318 fifth argument of getsockopt() amongst other things. This is now
5319 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5320 can be set for individual OS. I have set it for SunOS5, OSF1, and
5321 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5322 some earlier ones do not.
5324 7. Change 4.30/15 was not doing the test caselessly.
5326 8. The standard form for an IPv6 address literal was being rejected by address
5327 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5328 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5329 this, as well as the form without the "IPv6" on the front (but only when
5330 address literals are enabled, of course).
5332 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5334 10. Exim crashed if a message with an empty sender address specified by -f
5335 encountered a router with an errors_to setting. This could be provoked only
5336 by a command such as
5340 where an empty string was supplied; "<>" did not hit this bug.
5342 11. Installed PCRE release 4.5.
5344 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5345 remained set. It is now erased.
5347 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5348 times from message ids (which are base 36 rather than the normal 62).
5350 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5351 were being counted as actual protocol errors, and logged if the log
5352 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5353 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5354 and DATA following a set of rejected RCPTs do not count as protocol errors.
5355 In other words, Exim assumes they were pipelined, though this may not
5356 actually be the case. Of course, in all cases the client gets an
5357 appropriate error code.
5359 15. If a lookup fails in an ACL condition, a message about the failure may
5360 be available; it is used if testing the ACL cannot continue, because most
5361 such messages specify what the cause of the deferral is. However, some
5362 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5363 that caused an old message to be retained and used if a later statement
5364 caused a defer, replacing the real cause of the deferral.
5366 16. If an IP address had so many PTR records that the DNS lookup buffer
5367 was not large enough to hold them, Exim could crash while trying to process
5368 the truncated data. It now detects and logs this case.
5370 17. Further to 4.21/58, another change has been made: if (and only if) the
5371 first line of a message (the first header line) ends with CRLF, a bare LF
5372 in a subsequent header line has a space inserted after it, so as not to
5373 terminate the header.
5375 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5376 unnecessarily, used atoi() instead of strtol(), and didn't check the
5377 termination when getting file sizes from file names by regex.
5379 19. Completely re-implemented the support for maildirsize files, in the light
5380 of a number of problems with the previous contributed implementation
5381 (4.30/29). In particular:
5383 . If the quota is zero, the maildirsize file is maintained, but no quota is
5386 . If the maildir directory does not exist, it is created before any attempt
5387 to write a maildirsize file.
5389 . The quota value in the file is just a cache; if the quota is changed in
5390 the transport, the new value overrides.
5392 . A regular expression is available for excluding directories from the
5395 20. The autoreply transport checks the characters in options that define the
5396 message's headers; it allows continued headers, but it was checking with
5397 isspace() after an embedded newline instead of explicitly looking for a
5400 21. If all the "regular" hosts to which an address was routed had passed their
5401 expiry times, and had not reached their retry times, the address was
5402 bounced, even if fallback hosts were defined. Now Exim should go on to try
5405 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5406 equivalent code in the SMTP transport. Some hosts send humungous responses
5407 to HELO/EHLO, more than 1024 it seems.
5409 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5410 gives compiler warnings in some environments. I've now done it "properly",
5413 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5414 (because of problems with the built-in one) was declared to return uschar *
5415 instead of char *, causing compiler failure.
5417 25. Fixed a file descriptor leak when processing alias/forward files.
5419 26. Fixed a minor format string issue in dbfn.c.
5421 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5423 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5424 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5427 29. When a sender address is verified, it is cached, to save repeating the test
5428 when there is more than one recipient in a message. However, when the
5429 verification involves a callout, it is possible for different callout
5430 options to be set for different recipients. It is too complicated to keep
5431 track of this in the cache, so now Exim always runs a verification when a
5432 callout is required, relying on the callout cache for the optimization.
5433 The overhead is duplication of the address routing, but this should not be
5436 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5437 to be verified with callout=postmaster, and the main callout worked but the
5438 postmaster check failed, the verification correctly failed. However, if a
5439 subsequent RCPT command asked for sender verification *without* the
5440 postmaster check, incorrect caching caused this verification also to fail,
5443 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5444 it was not caching the DNS options (qualify_single, search_parents) that
5445 were used when the lookup failed. A subsequent lookup with different
5446 options therefore always gave the same answer, though there were cases
5447 where it should not have. (Example: a "domains = !$mx_any" option on a
5448 dnslookup router: the "domains" option is always processed without any
5449 widening, but the router might have qualify_single set.) Now Exim uses the
5450 cached value only when the same options are set.
5452 32. Added John Jetmore's "exipick" utility to the distribution.
5454 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5455 than a timeout (e.g. a certificate is required, and is not provided), an
5456 Exim server now closes the connection immediately. Previously it waited for
5457 the client to close - but if the client is SSL, it seems that they each
5458 wait for each other, leading to a delay before one of them times out.
5460 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5461 maintained 0.8.x compatibility because I don't think many are using it, and
5462 it is clearly obsolete.
5464 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5467 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5468 client certificate was expired. A simple patch fixes this, though I don't
5469 understand the full logic of why the verify callback is called multiple
5472 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5473 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5474 which causes problems with some clients (such as the Certicom SSL Plus
5475 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5476 disables the coutermeasure allowing Eudora to connect."
5478 38. Exim was not checking that a write() to a log file succeeded. This could
5479 lead to Bad Things if a log got too big, in particular if it hit a file
5480 size limit. Exim now panics and dies if it cannot write to a log file, just
5481 as it does if it cannot open a log file.
5483 39. Modified OS/Makefile-Linux so that it now contains
5485 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5487 The two -D definitions ensure that Exim is compiled with large file
5488 support, which makes it possible to handle log files that are bigger than
5491 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5492 instance) a domain was checked against a named list that involved a lookup,
5493 causing $domain_data to be set, then another domain was checked against the
5494 same list, then the first domain was re-checked, the value of $domain_data
5495 after the final check could be wrong. In particular, if the second check
5496 failed, it could be set empty. This bug probably also applied to
5499 41. The strip_trailing_dot option was not being applied to the address given
5500 with the -f command-line option.
5502 42. The code for reading a message's header from the spool was incrementing
5503 $received_count, but never initializing it. This meant that the value was
5504 incorrect (doubled) while delivering a message in the same process in which
5505 it was received. In the most common configuration of Exim, this never
5506 happens - a fresh exec is done - but it can happen when
5507 deliver_drop_privilege is set.
5509 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5510 it now includes up to 150 characters of the unexpected data in the log
5513 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5514 and building data strings. The size of both of these buffers was 10 000
5515 bytes - far larger than anybody would *ever* want, thought I. Needless to
5516 say, somebody hit the limit. I have increased the maximum line length to
5517 20 000 and the maximum data length of concatenated lines to 100 000. I have
5518 also fixed two bugs, because there was no checking on these buffers. Tsk,
5519 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5520 buffer is too small.
5522 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5523 lsearch lookups. Now it does.
5525 46. When parsing a route_list item in a manualroute router, a fixed-length
5526 buffer was used for the list of hosts. I made this 1024 bytes long,
5527 thinking that nobody would ever have a list of hosts that long. Wrong.
5528 Somebody had a whole pile of complicated expansion conditions, and the
5529 string was silently truncated, leading to an expansion error. It turns out
5530 that it is easier to change to an unlimited length (owing to other changes
5531 that have happened since this code was originally written) than to build
5532 structure for giving a limitation error. The length of the item that
5533 expands into the list of hosts is now unlimited.
5535 47. The lsearch lookup could not handle data where the length of text line was
5536 more than 4095 characters. Such lines were truncated, leading to shortened
5537 data being returned. It should now handle lines of any length.
5539 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5540 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5543 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5544 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5545 no longer happens in comment lines. A list of replacements is now placed
5546 at the head of all of the source files, except those whose only change is
5547 to replace PERL_COMMAND in the very first #! line.
5549 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5550 messages on the queue, with a bottom-up merge sort, using code contributed
5551 by Michael Haardt. This should make operations like -bp somewhat faster on
5552 large queues. It won't affect queue runners, except when queue_run_in_order
5555 51. Installed eximstats 1.31 in the distribution.
5557 52. Added support for SRV lookups to the dnslookup router.
5559 53. If an ACL referred to $message_body or $message_body_end, the value was not
5560 reset for any messages that followed in the same SMTP session.
5562 54. The store-handling optimization for building very long strings was not
5563 differentiating between the different store pools. I don't think this
5564 actually made any difference in practice, but I've tidied it.
5566 55. While running the routers to verify a sender address, $sender_address
5567 was still set to the sender address. This is wrong, because when routing to
5568 send a bounce to the sender, it would be empty. Therefore, I have changed
5569 it so that, while verifying a sender address, $sender_address is set to <>.
5570 (There is no change to what happens when verifying a recipient address.)
5572 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5573 target A or AAAA records (if not already returned) without resetting the
5574 qualify_single or search_parents options of the DNS resolver. These are
5575 inappropriate in this case because the targets of MX and SRV records must
5576 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5577 target that, when qualified, matched something in the local domain. These
5578 two options are now turned off when doing these lookups.
5580 57. It seems that at least some releases of Reiserfs (which does not have the
5581 concept of a fixed number of inodes) returns zero and not -1 for the
5582 number of available inodes. This interacted badly with check_spool_inodes,
5583 which assumed that -1 was the "no such thing" setting. What I have done is
5584 to check that the total number of inodes is greater than zero before doing
5585 the test of how many are available.
5587 58. When a "warn" ACL statement has a log_message modifier, the message is
5588 remembered, and not repeated. This is to avoid a lot of repetition when a
5589 message has many recipients that cause the same warning to be written.
5590 Howewer, Exim was preserving the list of already written lines for an
5591 entire SMTP session, which doesn't seem right. The memory is now reset if a
5592 new message is started.
5594 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5595 debugging output unless log_rewrite was also set.
5597 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5598 of (int)(handle) when we know that handle contains (void *)(-1).
5600 61. The Exim daemon panic-logs an error return when it closes the incoming
5601 connection. However "connection reset by peer" seems to be common, and
5602 isn't really an error worthy of noting specially, so that particular error
5605 62. When Exim is trying to find all the local interfaces, it used to panic and
5606 die if the ioctl to get the interface flags failed. However, it seems that
5607 on at least one OS (Solaris 9) it is possible to have an interface that is
5608 included in the list of interfaces, but for which you get a failure error
5609 for this call. This happens when the interface is not "plumbed" into a
5610 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5611 failure of the "get flags" call assumes that the interface is down.
5613 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5614 makes life easier for people who are doing arithmetic on fields extracted
5615 from dates, where you often get leading zeros that should not be
5616 interpreted as octal.
5618 64. Added qualify_domain to the redirect router, to override the global
5621 65. If a pathologically long header line contained very many addresses (the
5622 report of this problem mentioned 10 000) and each of them was rewritten,
5623 Exim could use up a very large amount of memory. (It kept on making new
5624 copies of the header line as it rewrote, and never released the old ones.)
5625 At the expense of a bit more processing, the header rewriting function has
5626 been changed so that it no longer eats memory in this way.
5628 66. The generation of the Received: header has been moved from the time that a
5629 message starts to be received, to the time that it finishes. The timestamp
5630 in the Received: header should now be very close to that of the <= log
5631 line. There are two side-effects of this change:
5633 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5634 logged header lines no longer include the local Received: line, because
5635 it has not yet been created. The same applies to a copy of the message
5636 that is returned to a non-SMTP sender when a message is rejected.
5638 (b) When a filter file is tested using -bf, no additional Received: header
5639 is added to the test message. After some thought, I decided that this
5642 This change does not affect the value of $received_for. It is still set
5643 after address rewriting, but before local_scan() is called.
5645 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5647 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5648 gave an unhelpful panic error message, and a defer error. I have managed to
5649 change this behaviour so that it now rejects any supplied certificate,
5650 which seems right, as the list of acceptable certificates is empty.
5652 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5653 gave an unhelpful defer error. I have not managed to make this reject any
5654 supplied certificates, but the error message it gives is "no certificate
5655 supplied", which is not helpful.
5657 70. exigrep's output now also includes lines that are not associated with any
5658 message, but which match the given pattern. Implemented by a patch from
5659 Martin Sluka, which also tidied up the Perl a bit.
5661 71. Recipient callout verification, like sender verification, was using <> in
5662 the MAIL FROM command. This isn't really the right thing, since the actual
5663 sender may affect whether the remote host accepts the recipient or not. I
5664 have changed it to use the actual sender in the callout; this means that
5665 the cache record is now keyed on a recipient/sender pair, not just the
5666 recipient address. There doesn't seem to be a real danger of callout loops,
5667 since a callout by the remote host to check the sender would use <>.
5668 [SEE ABOVE: changed after hitting problems.]
5670 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5671 temporary errors. However, in the case of such a code being given after
5672 the end of a data transmission (i.e. after ".") Exim was failing to write
5673 a retry record for the message. (Yes, there was some broken host that was
5674 actually sending 8xx at this point.)
5676 73. An unknown lookup type in a host list could cause Exim to panic-die when
5677 the list was checked. (An example that provoked this was putting <; in the
5678 middle of a list instead of at the start.) If this happened during a DATA
5679 ACL check, a -D file could be left lying around. This kind of configuration
5680 error no longer causes Exim to die; instead it causes a defer errror. The
5681 incident is still logged to the main and panic logs.
5683 74. Buglet left over from Exim 3 conversion. The message "too many messages
5684 in one connection" was written to the rejectlog but not the mainlog, except
5685 when address rewriting (yes!) was being logged.
5687 75. Added write_rejectlog option.
5689 76. When a system filter was run not as root (that is, when system_filter_user
5690 was set), the values of the $n variables were not being returned to the
5691 main process; thus, they were not subsequently available in the $sn
5694 77. Added +return_path_on_delivery log selector.
5696 78. A connection timeout was being treated differently from recipients deferred
5697 when testing hosts_max_try with a message that was older than the host's
5698 retry timeout. (The host should not be counted, thus allowing all hosts to
5699 be tried at least once before bouncing.) This may have been the cause of an
5700 occasionally reported bug whereby a message would remain on the queue
5701 longer than the retry timeout, but would be bounced if a delivery was
5702 forced. I say "may" because I never totally pinned down the problem;
5703 setting up timeout/retry tests is difficult. See also the next item.
5705 79. The ultimate address timeout was not being applied to errors that involved
5706 a combination of host plus message (for example, a timeout on a MAIL
5707 command). When an address resolved to a number of possible hosts, and they
5708 were not all tried for each delivery (e.g. because of hosts_max_try), a
5709 message could remain on the queue longer than the retry timeout.
5711 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5714 81. Fixed an obscure SMTP outgoing bug which required at least the following
5715 conditions: (a) there was another message waiting for the same server;
5716 (b) the server returned 5xx to all RCPT commands in the first message so
5717 that the message was not completed; (c) the server dropped the connection
5718 or gave a negative response to the RSET that Exim sends to abort the
5719 transaction. The observed case was a dropped connection after DATA that had
5720 been sent in pipelining mode. That is, the server had advertised PIPELINING
5721 but was not implementing it correctly. The effect of the bug was incorrect
5722 behaviour, such as trying another host, and this could lead to a crash.
5728 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5729 and daemon.c were passed as pointers to ints; they should have been
5730 pointers to socklen_t variables (which are typically unsigned ints).
5732 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5735 3. Fixed a really odd bug that affected only the testing scheme; patching a
5736 certain fixed string in the binary changed the value of another string that
5737 happened to be identical to the end of the original first string.
5739 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5740 name", it returns that address as the IP address. On some operating
5741 systems (e.g. Solaris), it also passes back the IP address string as the
5742 "host name". However, on others (e.g. Linux), it passes back an empty
5743 string. Exim wasn't checking for this, and was changing the host name to an
5744 empty string, assuming it had been canonicized.
5746 5. Although rare, it is permitted to have more than one PTR record for a given
5747 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5748 all the names associated with an address, because they do in Solaris.
5749 However, it seems that they do not in Linux for data that comes from the
5750 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5751 I found this out when I moved to a new Linux workstation and tried to run
5752 the Exim test suite.
5754 To get round this problem I have changed the code so that it now does its
5755 own call to the DNS to look up PTR records when searching for a host name.
5756 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5757 addresses that are only in /etc/hosts are still found.
5759 This behaviour is, however, controlled by an option called host_lookup_
5760 order, which defaults to "bydns:byaddr". If people want to use the other
5761 order, or indeed, just use one or the other means of lookup, they can
5762 specify it in this variable.
5764 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5765 some operating systems, this comes back from gethostbyaddr() as an empty
5766 string, and this is what Exim used to test for. However, it seems that in
5767 other systems, "." is yielded. Exim now tests for this case too.
5769 7. The values of check_spool_space and check_log_space are now held internally
5770 as a number of kilobytes instead of an absolute number of bytes. If a
5771 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5772 kilobyte. This means that much larger values can be stored.
5774 8. Exim monitor: an attempt to get the action menu when not actually pointing
5775 at a message produces an empty menu entitled "No message selected". This
5776 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5777 no entries in it ("Shell widget menu has zero width and/or height"). So I
5778 have added a single, blank menu entry in this case.
5780 9. Added ${quote_local_part.
5782 10. MIME decoding is now applied to the contents of Subject: header lines when
5785 11. Now that a reference to $sender_host_address automatically causes a reverse
5786 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5787 host lookup before query-style lookups in lists that might use this
5788 variable. This has therefore been abolished, and the "net-" prefix is no
5789 longer necessary for query-style lookups.
5791 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5792 have been a typo for LFLAGS, so it has been changed.
5794 13. The install script calls Exim with "-C /dev/null" in order to find the
5795 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5796 to be output. Howeve, since Exim outputs its version number before the
5797 error, it didn't break the script. It just looked ugly. I fixed this by
5798 always allowing "-C /dev/null" if the caller is root.
5800 14. Ignore overlarge ACL variable number when reading spool file - insurance
5801 against a later release with more variables having written the file.
5803 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5804 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5805 this, as well as the form without the "IPv6" on the front.
5807 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5808 OS/Makefile-Darwin file.
5810 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5811 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5813 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5814 variable. However, some OS use ints for inodes. I've added cast to long int
5815 to get rid of the compiler warning.
5817 19. I had forgotten to lock out "/../" in configuration file names when
5818 ALT_CONFIG_PREFIX was set.
5820 20. Routers used for verification do not need to specify transports. However,
5821 if such a router generated a host list, and callout was configured, Exim
5822 crashed, because it could not find a port number from the (non-existent)
5823 transport. It now assumes port 25 in this circumstance.
5825 21. Added the -t option to exigrep.
5827 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5828 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5829 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5830 them is set, LOOKUP_LSEARCH is forced.
5832 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5834 24. Added sender and host information to the "rejected by local_scan()" log
5835 line; previously there was no indication of these.
5837 25. Added .include_if_exists.
5839 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5840 Linux. It turns out that not all file systems support this. Apparently some
5841 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5842 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5843 not supported on the file descriptor, is now ignored when Exim is trying to
5844 sync a directory. This applies only to Linux.
5846 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5848 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5849 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5852 29. Added support for maildirsize files from supplied patch (modified a bit).
5854 30. The use of :fail: followed by an empty string could lead Exim to respond to
5855 sender verification failures with (e.g.):
5857 550 Verification failed for <xxx>
5858 550 Sender verify failed
5860 where the first response line was missing the '-' that indicates it is not
5861 the final line of the response.
5863 31. The loop for finding the name of the user that called Exim had a hardwired
5864 limit of 10; it now uses the value of finduser_retries, which is used for
5865 all other user lookups.
5867 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5870 33. Exim was neglecting to zero errno before one call of strtol() when
5871 expanding a string and expecting an integer value. On some systems this
5872 resulted in spurious "integer overflow" errors. Also, it was casting the
5873 result into an int without checking.
5875 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5876 did not work. The code looks as if it has *never* worked, though it appears
5877 to have been documented since at least releast 1.62. I have made it work.
5879 35. The "timeout_DNS" error in retry rules, also documented since at least
5880 1.62, also never worked. As it isn't clear exactly what this means, and
5881 clearly it isn't a major issue, I have abolished the feature by treating it
5882 as "timeout", and writing a warning to the main and panic logs.
5884 36. The display of retry rules for -brt wasn't always showing the error code
5887 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5888 timeout_connect_A, timeout_connect_MX.
5890 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5891 to the empty sender.
5893 39. The daemon was not analysing the content of -oX till after it had closed
5894 stderr and disconnected from the controlling terminal. This meant that any
5895 syntax errors were only noted on the panic log, and the return code from
5896 the command was 0. By re-arranging the code a little, I've made the
5897 decoding happen first, so such errors now appear on stderr, and the return
5898 code is 1. However, the actual setting up of the sockets still happens in
5899 the disconnected process, so errors there are still only recorded on the
5902 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5903 connections (as happens on some IP stacks) was logged at start up time as
5904 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5905 it from "IPv6 and IPv4", which means that two separate sockets are being
5908 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5909 says whether AF_INET or AF_INET6 was passed as an argument.
5911 42. Exiwhat output was messed up when time zones were included in log
5914 43. Exiwhat now gives more information about the daemon's listening ports,
5915 and whether -tls-on-connect was used.
5917 44. The "port" option of the smtp transport is now expanded.
5919 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5920 silently ignored. Now an error message is written to the main and panic
5923 46. There's a new ACL modifier called "logwrite" which writes to a log file
5924 as soon as it is encountered.
5926 47. Added $local_user_uid and $local_user_gid at routing time.
5928 48. Exim crashed when trying to verify a sender address that was being
5931 49. Exim was recognizing only a space character after ".include". It now also
5932 recognizes a tab character.
5934 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5935 extracting the relevant information from the specification. The man page no
5936 longer contains scrambled data for the -d option, and I've added a section
5937 at the front about calling Exim under different names.
5939 51. Added "extra_headers" argument to the "mail" command in filter files.
5941 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5944 53. Installed eximstats 1.29.
5946 54. Added transport_filter_timeout as a generic transport option.
5948 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5949 Cc: header lines. This was required by RFC 822, but it not required by RFC
5952 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5953 incoming messages that did not have them. Now it does so only if the
5954 message originates locally, that is, if there is no associated remote host
5955 address. When Resent- header lines are present, this applies to the Resent-
5956 lines rather than the non-Resent- lines.
5958 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5959 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5961 58. Messages for configuration errors now include the name of the main
5962 configuration file - useful now that there may be more than one file in a
5963 list (.included file names were always shown).
5965 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5966 for those rare installations that do not start the daemon as root or run it
5967 setuid root. I've cut out the call to initgroups() if the daemon is not
5970 60. The Exim user and group can now be bound into the binary as text strings
5971 that are looked up at the start of Exim's processing.
5973 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5975 62. Added $mailstore_basename variable.
5977 63. Installed patch to sieve.c from Michael Haardt.
5979 64. When Exim failed to open the panic log after failing to open the main log,
5980 the original message it was trying to log was written to stderr and debug
5981 output, but if they were not available (the usual case in production), it
5982 was lost. Now it is written to syslog before the two lines that record the
5983 failures to open the logs.
5985 65. Users' Exim filters run in subprocesses under the user's uid. It is
5986 possible for a "deliver" command or an alias in a "personal" command to
5987 provoke an address rewrite. If logging of address rewriting is configured,
5988 this fails because the process is not running as root or exim. There may be
5989 a better way of dealing with this, but for the moment (because 4.30 needs
5990 to be released), I have disabled address rewrite logging when running a
5991 filter in a non-root, non-exim process.
5997 1. The buildconfig auxiliary program wasn't quoting the value set for
5998 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5999 not defined. This bug was masked in 4.22 by the effect that was fixed in
6002 2. Some messages that were rejected after a message id was allocated were
6003 shown as "incomplete" by exigrep. It no longer does this for messages that
6004 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6006 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6007 have allow_domain_literals set, the ID did not get logged in the <= line.
6008 Domain literals are now always recognized in Message-ID: header lines.
6010 4. The first argument for a ${extract expansion item is the key name or field
6011 number. Leading and trailing spaces in this item were not being ignored,
6012 causing some misleading effects.
6014 5. When deliver_drop_privilege was set, single queue runner processes started
6015 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6016 same command in the process it spins off) were not dropping privilege.
6018 6. When the daemon running as "exim" started a queue runner, it always
6019 re-executed Exim in the spun-off process. This is a waste of effort when
6020 deliver_drop_privilege is set. The new process now just calls the
6021 queue-runner function directly.
6027 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6030 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6031 ignored. Though the use of -oP was forcing the writing of a pid file, it
6032 was always written to the default place.
6034 3. If the message "no IP address found for host xxxx" is generated during
6035 incoming verification, it is now followed by identification of the incoming
6036 connection (so you can more easily find what provoked it).
6038 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6040 5. Added some features to "harden" Exim a bit more against certain attacks:
6042 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6043 be put in Local/Makefile. This is like the never_users runtime option,
6044 but it cannot be overridden. The default setting is "root".
6046 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6047 prefix string with which any file named in a -C command line option
6050 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6051 is retained for -C and -D only if the caller of Exim is root. Without
6052 it, the exim user may also use -C and -D and retain privilege.
6054 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6055 command line option is disabled.
6057 6. Macro names set by the -D option must start with an upper case letter, just
6058 like macro names defined in the configuration file.
6060 7. Added "dereference=" facility to LDAP.
6062 8. Two instances of the typo "uknown" in the source files are fixed.
6064 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6065 the Configure-Makefile script screwed up while processing it.
6067 10. Incorporated PCRE 4.4.
6069 11. The SMTP synchronization check was not operating right at the start of an
6070 SMTP session. For example, it could not catch a HELO sent before the client
6071 waited for the greeting. There is now a check for outstanding input at the
6072 point when the greeting is written. Because of the duplex, asynchronous
6073 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6074 way, but not yet received, when the check is performed.
6076 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6077 on TCP/IP sockets, because this apparently causes some broken clients to
6080 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6081 unchanged) from the Cygwin maintainer.
6083 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6084 was supported instead of testing for mbx. Effectively a typo.
6086 15. The spa authenticator server code was not checking that the input it
6087 received was valid base64.
6089 16. The debug output line for the "set" modifier in ACLs was not showing the
6090 name of the variable that was being set.
6092 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6094 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6095 lookup on its own. Something else was needed to trigger the lookup. For
6096 example, a match in host_lookup or the need for a host name in a host list.
6097 Now, if $sender_host_name is referenced and the host name has not yet been
6098 looked up, a lookup is performed. If the lookup fails, the variable remains
6099 empty, and $host_lookup_failed is set to "1".
6101 19. Added "eqi" as a case-independent comparison operator.
6103 20. The saslauthd authentication condition could segfault if neither service
6104 nor realm was specified.
6106 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6107 error message that was logged was misleading, and incoming SMTP
6108 connections were dropped. The message is now more accurate, and temporary
6109 errors are given to SMTP connections.
6111 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6112 (except RSET) with a 421 error, until QUIT is received. However, it was
6113 failing to send a response to QUIT.
6115 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6116 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6117 ACL is now run after the helo_try_verify_hosts code.
6119 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6120 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6121 case-independent, so other case variants are also recognized). Apparently
6122 some systems use these upper case variants.
6124 25. If more than two messages were waiting for the same host, and a transport
6125 filter was specified for the transport, Exim sent two messages over the
6126 same TCP/IP connection, and then failed with "socket operation on non-
6127 socket" when it tried to send the third.
6129 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6131 27. The extern definition of crypt16() in expand.c was not being excluded when
6132 the OS had its own crypt16() function.
6134 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6135 as a preferred synonym for return_size_limit, both as an option and as an
6138 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6140 30. Changed the default configuration ACL to relax the local part checking rule
6141 for addresses that are not in any local domains. For these addresses,
6142 slashes and pipe symbols are allowed within local parts, but the sequence
6143 /../ is explicitly forbidden.
6145 31. SPA server authentication was not clearing the challenge buffer before
6148 32. log_message in a "warn" ACL statement was writing to the reject log as
6149 well as to the main log, which contradicts the documentation and doesn't
6150 seem right (because no rejection is happening). So I have stopped it.
6152 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6153 However, I am unable to do any testing of this.
6155 34. Fixed an infelicity in the appendfile transport. When checking directories
6156 for a mailbox, to see if any needed to be created, it was accidentally
6157 using path names with one or more superfluous leading slashes; tracing
6158 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6160 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6161 contents are added to the log line that is written for every discarded
6162 recipient. (Previously a log_message setting was ignored.)
6164 36. The ${quote: operator now quotes the string if it is empty.
6166 37. The install script runs exim in order to find its version number. If for
6167 some reason other than non-existence or emptiness, which it checks, it
6168 could not run './exim', it was installing it with an empty version number,
6169 i.e. as "exim-". This error state is now caught, and the installation is
6172 38. An argument was missing from the function that creates an error message
6173 when Exim fails to connect to the socket for saslauthd authentication.
6174 This could cause Exim to crash, or give a corrupted message.
6176 39. Added isip, isip4, and isip6 to ${if conditions.
6178 40. The ACL variables $acl_xx are now saved with the message, and can be
6179 accessed later in routers, transports, and filters.
6181 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6182 strings in the file are not string-expanded.
6184 42. If a MAIL command specified a SIZE value that was too large to fit into an
6185 int variable, the check against message_size_limit failed. Such values are
6186 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6187 day this will have to be increased, but I don't think I want to be around
6188 when emails are that large.
6195 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6196 iconv() is not standard in FreeBSD.
6198 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6199 IPv6 enabled. The observed symptom was a segmentation fault on return from
6200 the function os_common_find_running_interfaces() in src/os.c.
6202 3. In the check_special_case() function in daemon.c I had used "errno" as an
6203 argument name, which causes warnings on some systems. This was basically a
6204 typo, since it was named "eno" in the comments!
6206 4. The code that waits for the clock to tick (at a resolution of some fraction
6207 of a second) so as to ensure message-id uniqueness was always waiting for
6208 at least one whole tick, when it could have waited for less. [This is
6209 almost certainly not relevant at current processor speeds, where it is
6210 unlikely to ever wait at all. But we try to future-proof.]
6212 5. The function that sleeps for a time interval that includes fractions of a
6213 second contained a race. It did not block SIGALRM between setting the
6214 timer, and suspending (a couple of lines later). If the interval was short
6215 and the sigsuspend() was delayed until after it had expired, the suspension
6216 never ended. On busy systems this could lead to processes getting stuck for
6219 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6220 process, before it forks any delivery processes. The open lookup caching
6221 mechanism meant that the open file or database connection was passed into
6222 the delivery process. The problem was that delivery processes always tidy
6223 up cached lookup data. This could cause a problem for the next delivery
6224 process started by the queue runner, because the external queue runner
6225 process does not know about the closure. So the next delivery process
6226 still has data in the lookup cache. In the case of a file lookup, there was
6227 no problem because closing a file descriptor in a subprocess doesn't affect
6228 the parent. However, if the lookup was caching a connection to a database,
6229 the connection was closed, and the second delivery process was likely to
6230 see errors such as "PGSQL: query failed: server closed the connection
6231 unexpectedly". The problem has been fixed by closing all cached lookups
6232 in a queue runner before running a delivery process.
6234 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6235 seem to have the "const" qualifier which it has on other OS. I've
6238 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6239 *of the same type* (client or server) with the same public name that an
6240 error should be diagnosed.
6242 9. When Exim looked up a host name for an IP address, but failed to find the
6243 original IP address when looking up the host name (a safety check), it
6244 output the message "<ip address> does not match any IP for NULL", which was
6245 confusing, to say the least. The bug was that the host name should have
6246 appeared instead of "NULL".
6248 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6249 user that is built into the binary, and the -C or -D options is used, root
6250 privilege is dropped before the configuration file is read. In addition,
6251 logging is switched to stderr instead of the normal log files. If the
6252 configuration then re-defines the Exim user, the unprivileged environment
6253 is probably not what is expected, so Exim logs a panic warning message (but
6256 However, if deliver_drop_privilege is set, the unprivileged state may well
6257 be exactly what is intended, so the warning has been cut out in that case,
6258 and Exim is allowed to try to write to its normal log files.
6264 1. smtp_return_error_details was not giving details for temporary sender
6265 or receiver verification errors.
6267 2. Diagnose a configuration error if two authenticators have the same public
6270 3. Exim used not to create the message log file for a message until the first
6271 delivery attempt. This could be confusing when incoming messages were held
6272 for policy or load reasons. The message log file is now created at the time
6273 the message is received, and an initial "Received" line is written to it.
6275 4. The automatically generated man page for command line options had a minor
6276 bug that caused no ill effects; however, a more serious problem was that
6277 the procedure for building the man page automatically didn't always
6278 operate. Consequently, release 4.20 contains an out-of-date version. This
6279 shouldn't happen again.
6281 5. When building Exim with embedded Perl support, the script that builds the
6282 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6283 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6285 6. The freeze_tell option was not being used for messages that were frozen on
6286 arrival, either by an ACL or by local_scan().
6288 7. Added the smtp_incomplete_transaction log selector.
6290 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6291 was accepting AUTH without a new EHLO.
6293 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6294 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6297 10. Logging of TCP/IP connections (when configured) now happens in the main
6298 daemon process instead of the child process, so that the TCP/IP connection
6299 count is more accurate (but it can never be perfect).
6301 11. The use of "drop" in a nested ACL was not being handled correctly in the
6302 outer ACL. Now, if condition failure induced by the nested "drop" causes
6303 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6304 or "require"), the connection is dropped.
6306 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6307 that yield "discard" can now be used with an "accept" or a "discard" verb,
6308 but an error is generated for any others (because I can't see a useful way
6309 to define what should happen).
6311 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6312 are now processed in the same way as lines in the Exim configuration file.
6313 In particular, continuation lines are supported.
6315 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6317 15. Added -ti meaning -t -i.
6319 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6320 domains, and warn by logging if others are found.
6322 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
6323 returned from GIFCONF when Exim is trying to find the list of interfaces on
6324 a host. The code in os.c has been modified to copy each ifreq to an aligned
6325 structure in all cases.
6327 Also, in some cases, the returned ifreq's were being copied to a 'struct
6328 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6329 means the last couple of bytes of an IPv6 address could be chopped if the
6330 ifreq contained only a normal sockaddr (14 bytes storage).
6332 18. Named domain lists were not supported in the hosts_treat_as_local option.
6333 An entry such as +xxxx was not recognized, and was treated as a literal
6336 19. Ensure that header lines added by a DATA ACL are included in the reject log
6337 if the ACL subsequently rejects the message.
6339 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6340 MD5 (which is deprecated).
6342 21. When testing a filter file using -bf, Exim was writing a message when it
6343 took the sender from a "From " line in the message, but it was not doing so
6344 when it took $return_path from a Return-Path: header line. It now does.
6346 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6347 with a valid header line field name (a series of printing characters
6348 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6350 23. Changed "disc" in the source to "disk" to conform to the documentation and
6351 the book and for uniformity.
6353 24. Ignore Sendmail's -Ooption=value command line item.
6355 25. When execve() failed while trying to run a command in a pipe transport,
6356 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
6357 could be confused with a return value of 69 from the command itself. This
6358 has been changed to 127, the value the shell returns if it is asked to run
6359 a non-existent command. The wording for the related log line suggests a
6360 non-existent command as the problem.
6362 26. If received_header_text expands to an empty string, do not add a Received:
6363 header line to the message. (Well, it adds a token one on the spool, but
6364 marks it "old" so that it doesn't get used or transmitted.)
6366 27. Installed eximstats 1.28 (addition of -nt option).
6368 28. There was no check for failure on the call to getsockname() in the daemon
6369 code. This can fail if there is a shortage of resources on the system, with
6370 ENOMEM, for example. A temporary error is now given on failure.
6372 29. Contrary to the C standard, it seems that in some environments, the
6373 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6374 program. Exim now does this explicitly; it affects the formatting of
6375 timestamps using strftime().
6377 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6378 complaints. I've now initialized all the variables, to avoid this.
6380 32. Header lines added by a system filter were not being "seen" during
6381 transport-time rewrites.
6383 33. The info_callback() function passed to OpenSSL is set up with type void
6384 (*)(SSL *, int, int), as described somewhere. However, when calling the
6385 function (actually a macro) that sets it up, the type void(*)() is
6386 expected. I've put in a cast to prevent warnings from picky compilers.
6388 34. If a DNS black list lookup found a CNAME record, but there were no A
6389 records associated with the domain it pointed at, Exim crashed.
6391 35. If a DNS black list lookup returned more than one A record, Exim ignored
6392 all but the first. It now scans all returned addresses if a particular IP
6393 value is being sought. In this situation, the contents of the
6394 $dnslist_value variable are a list of all the addresses, separated by a
6397 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6398 to accept a host name and all its aliases if the forward lookup for any of
6399 them yielded the IP address of the incoming connection. Now it accepts only
6400 those names whose forward lookup yields the correct IP address. Any other
6401 names are discarded. This closes a loophole whereby a rogue DNS
6402 administrator could create reverse DNS records to break through a
6403 wildcarded host restriction in an ACL.
6405 37. If a user filter or a system filter that ran in a subprocess used any of
6406 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6407 the wrong values were passed to the pipe command ($thisaddress had the
6408 value of $0, $0 had the value of $1, etc). This bug was introduced by
6409 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6411 38. Improved the line breaking for long SMTP error messages from ACLs.
6412 Previously, if there was no break point between 40 and 75 characters, Exim
6413 left the rest of the message alone. Two changes have been made: (a) I've
6414 reduced the minimum length to 35 characters; (b) if it can't find a break
6415 point between 35 and 75 characters, it looks ahead and uses the first one
6416 that it finds. This may give the occasional overlong line, but at least the
6417 remaining text gets split now.
6419 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6420 file descriptors might be low, and that setting 1000 would always raise it.
6421 It turns out that in some environments, the limit is already over 1000 and
6422 that lowering it causes trouble. So now Exim takes care not to decrease it.
6424 40. When delivering a message, the value of $return_path is set to $sender_
6425 address at the start of routing (routers may change the value). By an
6426 oversight, this default was not being set up when an address was tested by
6427 -bt or -bv, which affected the outcome if any router or filter referred to
6430 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6431 log only when "message" or "log_message" are set. However, if one of the
6432 conditions was an address verification, or a call to a nested ACL, the
6433 messages generated by the underlying test were being passed through. This
6434 no longer happens. The underlying message is available in $acl_verify_
6435 message for both "message" and "log_message" expansions, so it can be
6436 passed through if needed.
6438 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6439 new expansion $bh_ to give the encoded byte string without charset
6440 translation. Translation happens only if iconv() is available; HAVE_ICONV
6441 indicates this at build time. HEADERS_CHARSET gives the charset to
6442 translate to; headers_charset can change it in the configuration, and
6443 "headers charset" can change it in an individual filter file.
6445 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6446 that creates RFC 2047 encoded "words" labels them as that charset instead
6447 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6448 expansion operator; (ii) when Exim creates a From: line for a local
6449 message; (iii) when a header line is rewritten to include a "phrase" part.
6451 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6452 buggy, causing it to skip the first lines of messages whose message ID
6453 ended in 'D'. This would not have bitten before Exim release 4.14, because
6454 message IDs were unlikely to end in 'D' before then. The effect was to have
6455 incorrect size information for certain domains.
6457 45. #include "config.h" was missing at the start of the crypt16.c module. This
6458 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6461 46. If there was a timeout during a "random" callout check, Exim treated it as
6462 a failure of the random address, and carried on sending RSET and the real
6463 address. If the delay was just some slowness somewhere, the response to the
6464 original RCPT would be taken as a response to RSET and so on, causing
6465 mayhem of various kinds.
6467 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6468 when I implemented it. It didn't allow for the fact that some option values
6469 may legitimatetly be negative (e.g. size_addition), and it didn't even do
6470 the right test for positive values.
6472 48. Domain names in DNS records are case-independent. Exim always looks them up
6473 in lower case. Some resolvers return domain names in exactly the case they
6474 appear in the zone file, that is, they may contain uppercase letters. Not
6475 all resolvers do this - some return always lower case. Exim was treating a
6476 change of case by a resolver as a change of domain, similar to a widening
6477 of a domain abbreviation. This triggered its re-routing code and so it was
6478 trying to route what was effectively the same domain again. This normally
6479 caused routing to fail (because the router wouldn't handle the domain
6480 twice). Now Exim checks for this case specially, and just changes the
6481 casing of the domain that it ultimately uses when it transmits the message
6484 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6487 50. If a filter generated a file delivery with a non-absolute name (possible if
6488 no home directory exists for the router), the forbid_file option was not
6491 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6492 the existing equality matching.
6494 52. Exim was using ints instead of ino_t variables in some places where it was
6495 dealing with inode numbers.
6497 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6498 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6499 called TMPDIR, and if it finds it is different, it changes its value.
6501 54. The smtp_printf() function is now made available to local_scan() so
6502 additional output lines can be written before returning. There is also an
6503 smtp_fflush() function to enable the detection of a dropped connection.
6504 The variables smtp_input and smtp_batched_input are exported to
6507 55. Changed the default runtime configuration: the message "Unknown user"
6508 has been removed from the ACL, and instead placed on the localuser router,
6509 using the cannot_route_message feature. This means that any verification
6510 failures that generate their own messages won't get overridden. Similarly,
6511 the "Unrouteable address" message that was in the ACL for unverifiable
6512 relay addresses has also been removed.
6514 56. Added hosts_avoid_esmtp to the smtp transport.
6516 57. The exicyclog script was not checking for the esoteric option
6517 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6518 will work only if exicyclog is run under the appropriate euid.
6520 58. Following a discussion on the list, the rules by which Exim recognises line
6521 endings on incoming messages have been changed. The -dropcr and drop_cr
6522 options are now no-ops, retained only for backwards compatibility. The
6523 following line terminators are recognized: LF CRLF CR. However, special
6524 processing applies to CR:
6526 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6527 nor a local message in the state where . is a terminator.
6529 (ii) If a bare CR is encountered in a header line, an extra space is added
6530 after the line terminator so as not to end the header. The reasoning
6531 behind this is that bare CRs in header lines are most likely either
6532 to be mistakes, or people trying to play silly games.
6534 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6535 was being incorrectly given as 18 bytes larger than it should have been.
6536 This is a VOB (very old bug).
6538 60. This may never have affected anything current, but just in case it has:
6539 When the local host is found other than at the start of a list of hosts,
6540 the local host, those with the same MX, and any that follow, are discarded.
6541 When the list in question was part of a longer list of hosts, the following
6542 hosts (not currently being processed) were also being discarded. This no
6543 longer happens. I'm not sure if this situation could ever has previously
6546 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6549 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6550 header. This is something that is recommended in a new Internet Draft, and
6551 is something that is documented as being done by Sendmail. There are two
6552 possible values. For messages generated by the autoreply transport, Exim
6555 Auto-Submitted: auto-replied
6557 whereas for all other generated messages (e.g. bounces) it adds
6559 Auto-Submitted: auto-generated
6561 63. The "personal" condition in filters now includes a test for the
6562 Auto-Submitted: header. If it contains the string "auto-" the message it
6563 not considered personal.
6565 64. Added rcpt_include_affixes as a generic transport option.
6567 65. Added queue_only_override (default true).
6569 66. Added the syslog_duplication option.
6571 67. If what should have been the first header line of a message consisted of
6572 a space followed by a colon, Exim was mis-interpreting it as a header line.
6573 It isn't of course - it is syntactically invalid and should therefore be
6574 treated as the start of the message body. The misbehaviour could have
6575 caused a number of strange effects, including loss of data in subsequent
6576 header lines, and spool format errors.
6578 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6579 client host had authenticated. This control can now be exercised by an ACL
6580 for more flexibility.
6582 69. By default, callouts do not happen when testing with -bh. There is now a
6583 variant, -bhc, which does actually run the callout code, including
6584 consulting and updating the callout cache.
6586 70. Added support for saslauthd authentication, courtesy of Alexander
6589 71. If statvfs() failed on the spool or log directories while checking their
6590 size for availability, Exim confusingly gave the error "space shortage".
6591 Furthermore, in debugging mode it crashed with a floating point exception.
6592 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6593 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6594 serious problem, Exim now writes to the main and panic logs when this
6595 happens, with details of the failure. It then refuses to accept the
6596 incoming message, giving the message "spool directory problem" or "log
6597 directory problem" with a 421 code for SMTP messages.
6599 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6600 0, 1, and 2 exist, because some OS complain for execs without them (see
6601 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6602 descriptors. However, the code omitted to check that the open succeeded,
6603 causing mysterious errors if for some reason the permissions on /dev/null
6604 got screwed. Now Exim writes a message to the main and panic logs, and
6605 bombs out if it can't open /dev/null.
6607 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6608 interact so that it is all more flexible. It is supposed to remain
6609 backwards compatible. Also added extra_local_interfaces.
6611 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6612 to bomb out with an assertion failure - to the client this appears as a
6613 connection drop. This problem occurs in the part of the code that was taken
6614 from the Samba project. Fortunately, the assertion is in a very simple
6615 function, so I have fixed this by reproducing the function inline in the
6616 one place where it is called, and arranging for authentication to fail
6617 instead of killing the process with assert().
6619 75. The SPA client code was not working when the server requested OEM rather
6620 than Unicode encoding.
6622 76. Added code to make require_files with a specific uid setting more usable in
6623 the case where statting the file as root fails - usually a non-root-mounted
6624 NFS file system. When this happens and the failure is EACCES, Exim now
6625 forks a subprocess and does the per-uid checking as the relevant uid.
6627 77. Added process_log_path.
6629 78. If log_file_path was not explicitly set, a setting of check_log_space or
6630 check_log_inodes was ignored.
6632 79. If a space check for the spool or log partitions fails, the incident is now
6633 logged. Of course, in the latter case the data may get lost...
6635 80. Added the %p formatting code to string_format() so that it can be used to
6636 print addresses in debug_print(). Adjusted all the address printing in the
6637 debugging in store.c to use %p rather than %d.
6639 81. There was a concern that a line of code in smtp_in.c could overflow a
6640 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6641 initially expressed, the concern was not well-founded, because trailing
6642 spaces are removed early. However, if the trailing spaces were followed by
6643 a NULL, they did not get removed, so the overflow was possible. Two fixes
6646 (a) I re-wrote the offending code in a cleaner fashion.
6647 (b) If an incoming SMTP command contains a NULL character, it is rejected
6650 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6651 runs initgroups(), so that if the Exim user is in any additional groups,
6652 they will be used during message reception.
6658 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob