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.
11 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
12 than -2003 did; needs libidn2 in addition to libidn.
14 JH/02 The path option on a pipe transport is now expanded before use.
16 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
17 Patch provided by "Björn", documentation fix added too.
19 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
20 missing a wire-to-host endian conversion.
22 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
23 close after a BDAT command line could be taken as a following command,
24 giving a synch failure. Fix by only checking for synch immediately
25 before acknowledging the chunk.
27 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
28 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
29 macro. Patches provided by Josh Soref.
31 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
32 Previously we did not; the RFC seems ambiguous and VRFY is not listed
33 by IANA as a service extension. However, John Klensin suggests that we
36 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
37 the dkim code may be unix-mode line endings rather than smtp wire-format
38 CRLF, so prepend a CR to any bare LF.
40 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
41 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
43 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
44 the first were themselves being wrongly included in the feed into dkim
45 processing; with most chunk sizes in use this resulted in an incorrect
46 body hash calculated value.
48 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
49 DKIM signature block, for verification. Although advised against by
50 standards it is specifically not ruled illegal.
52 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
54 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
55 missing a body hash (the bh= tag).
57 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
58 It seems that HAProxy sends the Proxy Protocol information in clear and
59 only then does a TLS startup, so do the same.
61 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
62 TCP connections (such as for Spamd) unless the daemon successfully set
63 Fast Open mode on its listening sockets. This fixes breakage seen on
64 too-old kernels or those not configured for Fast Open, at the cost of
65 requiring both directions being enabled for TFO, and TFO never being used
66 by non-daemon-related Exim processes.
68 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
69 endings, at least on the first header line. Try to canonify any that get
70 past that check, despite the cost.
72 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
73 now limited to an arbitrary five deep, while parsing addresses with the
74 strip_excess_angle_brackets option enabled.
76 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
77 instead leave the unprompted TLS handshake in socket buffer for the
78 TLS library to consume.
84 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
85 supports it and a size is available (ie. the sending peer gave us one).
87 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
88 years of being deprecated). The replacements are the ACLs
89 acl_smtp_mime and acl_not_smtp_mime.
91 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
92 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
93 or even an in-clear connection were permitted. Now, if the host lookup
94 was dnssec and dane was requested then the host is only used if the
95 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
96 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
97 if one fails this test.
98 This means that a poorly-configured remote DNS will make it incommunicado;
99 but it protects against a DNS-interception attack on it.
101 JH/04 Bug 1810: make continued-use of an open smtp transport connection
102 non-noisy when a race steals the message being considered.
104 JH/05 If main configuration option tls_certificate is unset, generate a
105 self-signed certificate for inbound TLS connections.
107 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
108 in rewrites and routers.
110 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
111 and logged a warning sing 4.83; now they are a configuration file error.
113 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
114 (lacking @domain). Apply the same qualification processing as RCPT.
116 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
118 JH/10 Support ${sha256:} applied to a string (as well as the previous
121 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
122 a cutthrough deliver is pending, as we always want to make a connection.
123 This also avoids re-routing the message when later placing the cutthrough
124 connection after a verify cache hit.
125 Do not update it with the verify result either.
127 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
128 when routing results in more than one destination address.
130 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
131 signing (which inhibits the cutthrough capability). Previously only
132 the presence of an option was tested; now an expansion evaluating as
133 empty is permissible (obviously it should depend only on data available
134 when the cutthrough connection is made).
136 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
137 the relevant preceding SMTP command did not note the pipelining mode.
139 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
140 Previously they were not counted.
142 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
143 as one having no matching records. Previously we deferred the message
144 that needed the lookup.
146 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
147 distinguished as "(=".
149 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
150 for missing MX records. Previously it only worked for missing A records.
152 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
154 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
155 after the data-go-ahead and data-ack. Patch from Jason Betts.
157 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
158 even for a "none" policy. Patch from Tony Meyer.
160 JH/22 Fix continued use of a connection for further deliveries. If a port was
161 specified by a router, it must also match for the delivery to be
164 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
165 When one of the recipients of a message was unsuitable for the connection
166 (has no matching addresses), we lost track of needing to mark it
167 deferred. As a result mail would be lost.
169 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
171 JH/25 Decoding ACL controls is now done using a binary search; the source code
172 takes up less space and should be simpler to maintain. Merge the ACL
173 condition decode tables also, with similar effect.
175 JH/26 Fix problem with one_time used on a redirect router which returned the
176 parent address unchanged. A retry would see the parent address marked as
177 delivered, so not attempt the (identical) child. As a result mail would
180 JH/27 Fix a possible security hole, wherein a process operating with the Exim
181 UID can gain a root shell. Credit to http://www.halfdog.net/ for
182 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
185 JH/28 Enable {spool,log} filesystem space and inode checks as default.
186 Main config options check_{log,spool}_{inodes,space} are now
187 100 inodes, 10MB unless set otherwise in the configuration.
189 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
190 Previously it only applied to the main-section connection policy
193 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
195 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
196 by me. Added RFC7919 DH primes as an alternative.
198 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
199 are not in the system include path.
201 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
202 GnuTLS, when a session startup failed (eg because the client disconnected)
203 Exim did stdio operations after fclose. This was exposed by a recent
204 change which nulled out the file handle after the fclose.
206 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
207 signed directly by the cert-signing cert, rather than an intermediate
208 OCSP-signing cert. This is the model used by LetsEncrypt.
210 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
212 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
213 an incoming connection.
215 HS/02 Bug 1802: Do not half-close the connection after sending a request
218 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
219 fallback to "prime256v1".
221 JH/34 SECURITY: Use proper copy of DATA command in error message.
222 Could leak key material. Remotely exploitable. CVE-2016-9963.
228 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
229 and 3.4.4 - once the server is enabled to respond to an OCSP request
230 it does even when not requested, resulting in a stapling non-aware
231 client dropping the TLS connection.
233 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
234 support variable-length bit vectors. No functional change.
236 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
237 The I= interface field on outgoing lines is now after the H= remote
238 host field, same as incoming lines. There is a separate
239 outgoing_interface log selector which allows you to disable the
242 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
243 If not running log_selector +smtp_connection the mainlog would be held
244 open indefinitely after a "too many connections" event, including to a
245 deleted file after a log rotate. Leave the per net connection logging
246 leaving it open for efficiency as that will be quickly detected by the
247 check on the next write.
249 HS/01 Bug 1671: Fix post transport crash.
250 Processing the wait-<transport> messages could crash the delivery
251 process if the message IDs didn't exist for some reason. When
252 using 'split_spool_directory=yes' the construction of the spool
253 file name failed already, exposing the same netto behaviour.
255 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
256 mime_regex ACL conditions.
258 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
259 to DSN fail messages (bounces): remote IP, remote greeting, remote response
260 to HELO, local diagnostic string.
262 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
263 log line to debug. Even when configured with a tls authenticator many
264 client connections are expected to not authenticate in this way, so
265 an authenticate fail is not an error.
267 HS/02 Add the Exim version string to the process info. This way exiwhat
268 gives some more detail about the running daemon.
270 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
271 matter for fast-change records such as DNSBLs.
273 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
274 retry record, even if constant. There may be multiple transports with
275 different interface settings and the retry behaviour needs to be kept
278 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
280 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
282 JH/10 Bug 840: fix log_defer_output option of pipe transport
284 JH/11 Bug 830: use same host for all RCPTS of a message, even under
285 hosts_randomize. This matters a lot when combined with mua_wrapper.
287 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
288 ${quote_pgsql:<string>} operator.
290 JH/13 Bug 1708: avoid misaligned access in cached lookup.
292 JH/14 Change header file name for freeradius-client. Relevant if compiling
293 with Radius support; from the Gentoo tree and checked under Fedora.
295 JH/15 Bug 1712: Introduce $prdr_requested flag variable
297 JH/16 Bug 1714: Permit an empty string as expansion result for transport
298 option transport_filter, meaning no filtering.
300 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
302 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
303 defaults to "*" (all hosts). The variable is now available when not built
304 with TLS, default unset, mainly to enable keeping the testsuite sane.
305 If a server certificate is not supplied (via tls_certificate) an error is
306 logged, and clients will find TLS connections fail on startup. Presumably
307 they will retry in-clear.
308 Packagers of Exim are strongly encouraged to create a server certificate
309 at installation time.
311 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
312 with the $config_file variable.
314 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
315 in transport context, after the attempt, and per-recipient. The latter type
316 is per host attempted. The event data is the error message, and the errno
317 information encodes the lookup type (A vs. MX) used for the (first) host,
318 and the trailing two digits of the smtp 4xx response.
320 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
321 to write to mainlog (or rejectlog, paniclog) in the window between file
322 creation and permissions/ownership being changed. Particularly affects
323 installations where exicyclog is run as root, rather than exim user;
324 result is that the running daemon panics and dies.
326 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
328 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
329 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
330 "pri" and "weight". Note that the previous implicit priority given by the
331 list order is no longer honoured.
333 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
336 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
337 by defining SUPPORT_SOCKS.
339 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
340 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
341 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
342 variables are renamed to proxy_{local,external}_{address,port}.
344 JH/27 Move Internationalisation support from Experimental to mainline, enabled
345 for a build by defining SUPPORT_I18N
347 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
348 of the query string, and make ${quote_redis:} do that quoting.
350 JH/29 Move Events support from Experimental to mainline, enabled by default
351 and removable for a build by defining DISABLE_EVENT.
353 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
355 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
356 cached by the daemon.
358 JH/32 Move Redis support from Experimental to mainline, enabled for a build
359 by defining LOOKUP_REDIS. The libhiredis library is required.
361 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
362 keys are given for lookup.
364 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
365 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
366 only supported when built with TLS support. The PolarSSL SHA routines
367 are still used when the TLS library is too old for convenient support.
369 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
370 openssl_options), for security. OpenSSL forces this from version 1.1.0
371 server-side so match that on older versions.
373 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
374 allocation for $value could be released as the expansion processing
375 concluded, but leaving the global pointer active for it.
377 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
378 and to use the domains and local_parts ACL conditions.
380 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
381 incorrectly not doubled on cutthrough transmission, hence seen as a
382 body-termination at the receiving system - resulting in truncated mails.
383 Commonly the sender saw a TCP-level error, and retransmitted the message
384 via the normal store-and-forward channel. This could result in duplicates
385 received - but deduplicating mailstores were liable to retain only the
386 initial truncated version.
388 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
390 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
392 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
393 we're in there, support oversigning also; bug 1309.
395 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
397 HS/04 Add support for keep_environment and add_environment options.
399 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
400 either intentional arithmetic overflow during PRNG, or testing config-
403 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
404 delivery resulted in actual delivery. Cancel cutthrough before DATA
407 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
408 rejects a recipient: pass the reject to the originator.
410 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
411 Many were false-positives and ignorable, but it's worth fixing the
414 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
415 for the new environment-manipulation done at startup. Move the routines
416 from being local to tls.c to being global via the os.c file.
418 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
419 an extract embedded as result-arg for a map, the first arg for extract
420 is unavailable so we cannot tell if this is a numbered or keyed
421 extraction. Accept either.
427 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
430 JH/02 The smtp transport option "multi_domain" is now expanded.
432 JH/03 The smtp transport now requests PRDR by default, if the server offers
435 JH/04 Certificate name checking on server certificates, when exim is a client,
436 is now done by default. The transport option tls_verify_cert_hostnames
437 can be used to disable this per-host. The build option
438 EXPERIMENTAL_CERTNAMES is withdrawn.
440 JH/05 The value of the tls_verify_certificates smtp transport and main options
441 default to the word "system" to access the system default CA bundle.
442 For GnuTLS, only version 3.0.20 or later.
444 JH/06 Verification of the server certificate for a TLS connection is now tried
445 (but not required) by default. The verification status is now logged by
446 default, for both outbound TLS and client-certificate supplying inbound
449 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
452 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
453 Status Notification (bounce) messages are now MIME format per RFC 3464.
454 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
455 under the control of the dsn_advertise_hosts option, and routers may
456 have a dsn_lasthop option.
458 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
459 default, modifiable by a malware= option. The list separator for
460 the options can now be changed in the usual way. Bug 68.
462 JH/10 The smtp_receive_timeout main option is now expanded before use.
464 JH/11 The incoming_interface log option now also enables logging of the
465 local interface on delivery outgoing connections.
467 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
468 if the interface and destination host and port all match.
470 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
473 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
474 Patch from Andrew Lewis.
476 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
477 now supports optional time-restrictions, weighting, and priority
478 modifiers per server. Patch originally by <rommer@active.by>.
480 JH/16 The spamd_address main option now supports a mixed list of local
481 and remote servers. Remote servers can be IPv6 addresses, and
482 specify a port-range.
484 JH/17 Bug 68: The spamd_address main option now supports an optional
485 timeout value per server.
487 JH/18 Bug 1581: Router and transport options headers_add/remove can
488 now have the list separator specified.
490 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
493 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
496 JH/21 Support for the A6 type of dns record is withdrawn.
498 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
499 rather than the verbs used.
501 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
502 from 255 to 1024 chars.
504 JH/24 Verification callouts now attempt to use TLS by default.
506 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
507 are generic router options now. The defaults didn't change.
509 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
510 Original patch from Alexander Shikoff, worked over by JH.
512 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
513 files if ZCAT_COMMAND is not executable.
515 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
517 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
519 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
520 Normally benign, it bites when the pair was led to by a CNAME;
521 modern usage is to not canonicalize the domain to a CNAME target
522 (and we were inconsistent anyway for A-only vs AAAA+A).
524 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
526 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
527 when evaluating $sender_host_dnssec.
529 JH/31 Check the HELO verification lookup for DNSSEC, adding new
530 $sender_helo_dnssec variable.
532 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
534 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
536 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
538 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
539 documented as working, but never had. Support all but $spam_report.
541 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
542 added for tls authenticator.
544 HS/03 Add perl_taintmode main config option
550 TL/01 When running the test suite, the README says that variables such as
551 no_msglog_check are global and can be placed anywhere in a specific
552 test's script, however it was observed that placement needed to be near
553 the beginning for it to behave that way. Changed the runtest perl
554 script to read through the entire script once to detect and set these
555 variables, reset to the beginning of the script, and then run through
556 the script parsing/test process like normal.
558 TL/02 The BSD's have an arc4random API. One of the functions to induce
559 adding randomness was arc4random_stir(), but it has been removed in
560 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
561 function when detected.
563 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
564 cause callback expansion.
566 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
567 syntax errors in an expansion can be treated as a string instead of
568 logging or causing an error, due to the internal use of bool_lax
569 instead of bool when processing it.
571 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
572 server certificates when making smtp deliveries.
574 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
576 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
578 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
580 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
581 Merged patch from Sebastian Wiedenroth.
583 JH/05 Fix results-pipe from transport process. Several recipients, combined
584 with certificate use, exposed issues where response data items split
585 over buffer boundaries were not parsed properly. This eventually
586 resulted in duplicates being sent. This issue only became common enough
587 to notice due to the introduction of connection certificate information,
588 the item size being so much larger. Found and fixed by Wolfgang Breyha.
590 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
591 size buffer was used, resulting in syntax errors when an expansion
594 JH/07 Add support for directories of certificates when compiled with a GnuTLS
595 version 3.3.6 or later.
597 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
598 is EXPERIMENTAL_EVENT, the main-configuration and transport options
599 both become "event_action", the variables become $event_name, $event_data
600 and $event_defer_errno. There is a new variable $verify_mode, usable in
601 routers, transports and related events. The tls:cert event is now also
602 raised for inbound connections, if the main configuration event_action
605 TL/06 In test suite, disable OCSP for old versions of openssl which contained
606 early OCSP support, but no stapling (appears to be less than 1.0.0).
608 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
609 server certificate names available under the smtp transport option
610 "tls_verify_cert_hostname" now do not permit multi-component wildcard
613 JH/10 Time-related extraction expansions from certificates now use the main
614 option "timezone" setting for output formatting, and are consistent
615 between OpenSSL and GnuTLS compilations. Bug 1541.
617 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
618 encoded parameter in the incoming message. Bug 1558.
620 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
621 include certificate info, eximon was claiming there were spoolfile
624 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
626 JH/14 Log delivery-related information more consistently, using the sequence
627 "H=<name> [<ip>]" wherever possible.
629 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
630 are problematic for Debian distribution, omit them from the release
633 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
635 JH/16 Fix string representation of time values on 64bit time_t architectures.
638 JH/17 Fix a null-indirection in certextract expansions when a nondefault
639 output list separator was used.
644 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
645 checkers that were complaining about end of non-void function with no
648 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
649 This was a regression introduced in 4.83 by another bugfix.
651 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
653 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
654 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
660 TF/01 Correctly close the server side of TLS when forking for delivery.
662 When a message was received over SMTP with TLS, Exim failed to clear up
663 the incoming connection properly after forking off the child process to
664 deliver the message. In some situations the subsequent outgoing
665 delivery connection happened to have the same fd number as the incoming
666 connection previously had. Exim would try to use TLS and fail, logging
667 a "Bad file descriptor" error.
669 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
670 utilities have not been installed.
672 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
673 temporary space as the ACL may create new global variables.
675 TL/01 LDAP support uses per connection or global context settings, depending
676 upon the detected version of the libraries at build time.
678 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
679 to extract and use the src ip:port in logging and expansions as if it
680 were a direct connection from the outside internet. PPv2 support was
681 updated based on HAProxy spec change in May 2014.
683 JH/02 Add ${listextract {number}{list}{success}{fail}}.
685 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
686 Properly escape header and check for NULL return.
688 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
691 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
693 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
694 characters in header names, implemented as a verify condition.
695 Contributed by Michael Fischer v. Mollard.
697 TL/05 Rename SPF condition results err_perm and err_temp to standardized
698 results permerror and temperror. Previous values are deprecated but
699 still accepted. In a future release, err_perm and err_temp will be
700 completely removed, which will be a backward incompatibility if the
701 ACL tests for either of these two old results. Patch contributed by
702 user bes-internal on the mailing list.
704 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
706 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
707 selectors, in both main and reject logs.
709 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
712 JH/07 Add malware type "sock" for talking to simple daemon.
714 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
716 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
717 routers/transports under cutthrough routing.
719 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
720 numbers. Touch up "bool" conditional to keep the same definition.
722 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
724 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
726 JH/12 Expand items in router/transport headers_add or headers_remove lists
727 individually rather than the list as a whole. Bug 1452.
729 Required for reasonable handling of multiple headers_ options when
730 they may be empty; requires that headers_remove items with embedded
731 colons must have them doubled (or the list-separator changed).
733 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
734 view the policy declared in the DMARC record. Currently, $dmarc_status
735 is a combined value of both the record presence and the result of the
738 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
740 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
741 dnslookup router and the smtp transport (applying to the forward
744 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
745 of ldap servers used for a specific lookup. Patch provided by Heiko
748 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
749 New variable $lookup_dnssec_authenticated for observability.
751 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
752 Patch submitted by Lars Timman.
754 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
756 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
757 Requires trusted mode and valid format message id, aborts otherwise.
758 Patch contributed by Heiko Schlichting.
760 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
761 certextract with support for various fields. Bug 1358.
763 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
764 is requested by default, modifiable by smtp transport option
767 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
768 operate on certificate variables to give certificate fingerprints
769 Also new ${sha256:cert_variable}.
771 JH/23 The PRDR feature is moved from being Experimental into the mainline.
773 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
774 Christian Aistleitner.
776 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
778 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
779 file. Patch from Wolfgang Breyha.
781 JH/25 Expand the coverage of the delivery $host and $host_address to
782 client authenticators run in verify callout. Bug 1476.
784 JH/26 Port service names are now accepted for tls_on_connect_ports, to
785 align with daemon_smtp_ports. Bug 72.
787 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
788 support and error reporting did not work properly.
790 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
791 and is readable. Patch from Andrew Colin Kissa.
793 TL/14 Enhance documentation of ${run expansion and how it parses the
794 commandline after expansion, particularly in the case when an
795 unquoted variable expansion results in an empty value.
797 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
799 PP/02 Fix internal collision of T_APL on systems which support RFC3123
800 by renaming away from it. Addresses GH issue 15, reported by
803 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
805 TL/15 SECURITY: prevent double expansion in math comparison functions
806 (can expand unsanitized data). Not remotely exploitable.
813 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
815 PP/02 Make -n do something, by making it not do something.
816 When combined with -bP, the name of an option is not output.
818 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
821 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
822 $sender_host_name and config options to manage this, and basic check
825 PP/05 DSCP support for outbound connections and control modifier for inbound.
827 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
828 (Only plugin which currently uses this is kerberos4, which nobody should
829 be using, but we should make it available and other future plugins might
830 conceivably use it, even though it would break NAT; stuff *should* be
831 using channel bindings instead).
833 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
834 name; added for Sendmail compatibility; requires admin caller.
835 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
836 just ignore it); requires trusted caller.
837 Also parse but ignore: -Ac -Am -X<logfile>
840 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
842 TL/02 Add +smtp_confirmation as a default logging option.
844 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
845 Patch by Magnus Holmgren from 2007-02-20.
847 TL/04 Bugzilla 1281 - Spec typo.
848 Bugzilla 1283 - Spec typo.
849 Bugzilla 1290 - Spec grammar fixes.
851 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
853 TL/06 Add Experimental DMARC support using libopendmarc libraries.
855 TL/07 Fix an out of order global option causing a segfault. Reported to dev
856 mailing list by by Dmitry Isaikin.
858 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
860 JH/02 Support "G" suffix to numbers in ${if comparisons.
862 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
864 NM/01 Bugzilla 1197 - Spec typo
865 Bugzilla 1196 - Spec examples corrections
867 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
869 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
870 gnutls_enable_pkcs11, but renamed to more accurately indicate its
873 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
874 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
876 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
877 "acl {{name}{arg}...}", and optional args on acl condition
880 JH/05 Permit multiple router/transport headers_add/remove lines.
882 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
884 JH/07 Avoid using a waiting database for a single-message-only transport.
885 Performance patch from Paul Fisher. Bugzilla 1262.
887 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
890 JH/09 Add $headers_added variable, with content from use of ACL modifier
891 add_header (but not yet added to the message). Bugzilla 199.
893 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
894 Pulled from Bugzilla 817 by Wolfgang Breyha.
896 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
898 (nb: this is the same fix as in Exim 4.80.1)
900 JH/11 Add A= logging on delivery lines, and a client_set_id option on
903 JH/12 Add optional authenticated_sender logging to A= and a log_selector
906 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
908 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
909 advertise SMTP AUTH mechanism to us, instead of a generic
910 protocol violation error. Also, make Exim more robust to bad
911 data from the Dovecot auth socket.
913 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
915 When a queue runner is handling a message, Exim first routes the
916 recipient addresses, during which it prunes them based on the retry
917 hints database. After that it attempts to deliver the message to
918 any remaining recipients. It then updates the hints database using
921 So if a recipient address works intermittently, it can get repeatedly
922 deferred at routing time. The retry hints record remains fresh so the
923 address never reaches the final cutoff time.
925 This is a fairly common occurrence when a user is bumping up against
926 their storage quota. Exim had some logic in its local delivery code
927 to deal with this. However it did not apply to per-recipient defers
928 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
930 This change adds a proper retry rule check during routing so that the
931 final cutoff time is checked against the message's age. We only do
932 this check if there is an address retry record and there is not a
933 domain retry record; this implies that previous attempts to handle
934 the address had the retry_use_local_parts option turned on. We use
935 this as an approximation for the destination being like a local
936 delivery, as in LMTP.
938 I suspect this new check makes the old local delivery cutoff check
939 redundant, but I have not verified this so I left the code in place.
941 TF/02 Correct gecos expansion when From: is a prefix of the username.
943 Test 0254 submits a message to Exim with the header
947 When I ran the test suite under the user fanf2, Exim expanded
948 the header to contain my full name, whereas it should have added
949 a Resent-Sender: header. It erroneously treats any prefix of the
950 username as equal to the username.
952 This change corrects that bug.
954 GF/01 DCC debug and logging tidyup
955 Error conditions log to paniclog rather than rejectlog.
956 Debug lines prefixed by "DCC: " to remove any ambiguity.
958 TF/03 Avoid unnecessary rebuilds of lookup-related code.
960 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
961 Bug spotted by Jeremy Harris; was flawed since initial commit.
962 Would have resulted in OCSP responses post-SNI triggering an Exim
963 NULL dereference and crash.
965 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
967 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
968 Bug detection, analysis and fix by Samuel Thibault.
969 Bugzilla 1331, Debian bug #698092.
971 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
973 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
974 Server implementation by Todd Lyons, client by JH.
975 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
976 config variable "prdr_enable" controls whether the server
977 advertises the facility. If the client requests PRDR a new
978 acl_data_smtp_prdr ACL is called once for each recipient, after
979 the body content is received and before the acl_smtp_data ACL.
980 The client is controlled by both of: a hosts_try_prdr option
981 on the smtp transport, and the server advertisement.
982 Default client logging of deliveries and rejections involving
983 PRDR are flagged with the string "PRDR".
985 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
986 fclose(). Diagnosis by Todd Lyons.
988 PP/17 Update configure.default to handle IPv6 localhost better.
989 Patch by Alain Williams (plus minor tweaks).
992 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
993 This is now consistent with GnuTLS, and is now documented: the
994 previous undocumented portable approach to treating the option as
995 unset was to force an expansion failure. That still works, and
996 an empty string is now equivalent.
998 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
999 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1000 not performing validation itself.
1002 PP/20 Added force_command boolean option to pipe transport.
1003 Patch from Nick Koston, of cPanel Inc.
1005 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1008 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1010 PP/21 Fix eximon continuous updating with timestamped log-files.
1011 Broken in a format-string cleanup in 4.80, missed when I repaired the
1012 other false fix of the same issue.
1013 Report and fix from Heiko Schlichting.
1016 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1017 Report from Prashanth Katuri.
1019 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1020 It's SecureTransport, so affects any MacOS clients which use the
1021 system-integrated TLS libraries, including email clients.
1023 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1024 using a MIME ACL for non-SMTP local injection.
1025 Report and assistance in diagnosis by Warren Baker.
1027 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1029 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1031 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1032 last id that failed so it may be referenced in subsequent ACL's.
1034 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1037 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1038 ldap library initialization, allowing self-signed CA's to be
1039 used. Also properly sets require_cert option later in code by
1040 using NULL (global ldap config) instead of ldap handle (per
1041 session). Bug diagnosis and testing by alxgomz.
1043 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1044 the src/util/ subdirectory.
1046 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1047 renamed to Transport Post Delivery Action by Jeremy Harris, as
1050 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1051 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1052 redis_servers = needs to be configured which will be used by the redis
1053 lookup. Patch from Warren Baker, of The Packet Hub.
1055 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1057 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1058 hostname or reverse DNS when processing a host list. Used suggestions
1059 from multiple comments on this bug.
1061 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1063 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1064 Missed a few lines, added it to make the runtest require no keyboard
1067 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1068 contains upper case chars. Make router use caseful_local_part.
1070 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1071 support when GnuTLS has been built with p11-kit.
1077 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1079 This, or similar/improved, will also be change PP/11 of 4.82.
1085 PP/01 Handle short writes when writing local log-files.
1086 In practice, only affects FreeBSD (8 onwards).
1087 Bugzilla 1053, with thanks to Dmitry Isaikin.
1089 NM/01 Bugzilla 949 - Documentation tweak
1091 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1094 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1096 PP/02 Implemented gsasl authenticator.
1098 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1100 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1101 `pkg-config foo` for cflags/libs.
1103 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1104 with rest of GSASL and with heimdal_gssapi.
1106 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1107 `pkg-config foo` for cflags/libs for the TLS implementation.
1109 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1110 properties get this fed in as external SSF. A number of robustness
1111 and debugging improvements to the cyrus_sasl authenticator.
1113 PP/08 cyrus_sasl server now expands the server_realm option.
1115 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1116 Patch by Jeremy Harris.
1118 PP/10 Added dbmjz lookup type.
1120 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1122 PP/12 MAIL args handles TAB as well as SP, for better interop with
1123 non-compliant senders.
1124 Analysis and variant patch by Todd Lyons.
1126 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1127 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1128 Patch from Dirk Mueller <dmueller@suse.com>
1130 PP/13 tls_peerdn now print-escaped for spool files.
1131 Observed some $tls_peerdn in wild which contained \n, which resulted
1132 in spool file corruption.
1134 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1135 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1136 or write after TLS renegotiation, which otherwise led to messages
1139 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1140 as a tracking header (ie: a signed header comes before the signature).
1141 Patch from Wolfgang Breyha.
1143 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1144 comma-sep list; embedded commas doubled.
1146 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1148 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1150 Report and patch from Dmitry Banschikov.
1152 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1153 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1154 failures. We appear to now support TLS1.1+ with Exim.
1156 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1157 lets Exim select keys and certificates based upon TLS SNI from client.
1158 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1159 before an outbound SMTP session. New log_selector, +tls_sni.
1161 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1162 NULL dereference. Report and patch from Alun Jones.
1164 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1165 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1166 Not seeing resolver debug output on NetBSD, but suspect this is a
1167 resolver implementation change.
1169 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1170 Left warnings. Added "eximon gdb" invocation mode.
1172 PP/21 Defaulting "accept_8bitmime" to true, not false.
1174 PP/22 Added -bw for inetd wait mode support.
1176 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1177 locate the relevant includes and libraries. Made this the default.
1179 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1180 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1182 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1183 This may cause build issues on older platforms.
1185 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1186 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1187 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1188 Added SNI support via GnuTLS too.
1189 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1191 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1193 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1194 Applied second patch from Janne, implementing suggestion to default
1195 multiple-strings-in-record handling to match SPF spec.
1197 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1199 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1200 read-only, out of scope).
1201 Patch from Wolfgang Breyha, report from Stuart Northfield.
1203 PP/29 Fix three issues highlighted by clang analyser static analysis.
1204 Only crash-plausible issue would require the Cambridge-specific
1205 iplookup router and a misconfiguration.
1206 Report from Marcin Mirosław.
1208 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1210 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1211 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1212 As part of this, removing so much warning spew let me fix some minor
1213 real issues in debug logging.
1215 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1216 assignment on my part. Fixed.
1218 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1219 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1220 Janne Snabb (who went above and beyond: thank you).
1222 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1223 string otherwise requires a connection and a bunch more work and it's
1224 relatively easy to get wrong. Should also expose TLS library linkage
1227 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1228 64-bit ${eval} (JH/03).
1230 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1231 GNU libc to support some of the 64-bit stuff, should not lead to
1232 conflicts. Defined before os.h is pulled in, so if a given platform
1233 needs to override this, it can.
1235 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1236 protection layer was required, which is not implemented.
1237 Bugzilla 1254, patch from Wolfgang Breyha.
1239 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1240 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1241 tls_dhparam take prime identifiers. Also unbreak combination of
1242 OpenSSL+DH_params+TLSSNI.
1244 PP/39 Disable SSLv2 by default in OpenSSL support.
1250 PP/01 Solaris build fix for Oracle's LDAP libraries.
1251 Bugzilla 1109, patch from Stephen Usher.
1253 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1255 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1258 TF/02 Fix a couple more cases where we did not log the error message
1259 when unlink() failed. See also change 4.74-TF/03.
1261 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1262 lock up or crash if it happened to be inside a call to libc when it
1263 got a SIGUSR1 from exiwhat.
1265 The SIGUSR1 handler appends the current process status to the process
1266 log which is later printed by exiwhat. It used to use the general
1267 purpose logging code to do this, but several functions it calls are
1268 not safe for signals.
1270 The new output code in the SIGUSR1 handler is specific to the process
1271 log, and simple enough that it's easy to inspect for signal safety.
1272 Removing some special cases also simplifies the general logging code.
1273 Removing the spurious timestamps from the process log simplifies
1276 TF/04 Improved ratelimit ACL condition.
1278 The /noupdate option has been deprecated in favour of /readonly which
1279 has clearer semantics. The /leaky, /strict, and /readonly update modes
1280 are mutually exclusive. The update mode is no longer included in the
1281 database key; it just determines when the database is updated. (This
1282 means that when you upgrade Exim will forget old rate measurements.)
1284 Exim now checks that the per_* options are used with an update mode that
1285 makes sense for the current ACL. For example, when Exim is processing a
1286 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1287 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1288 must specify per_mail/readonly. If you omit the update mode it defaults to
1289 /leaky where that makes sense (as before) or /readonly where required.
1291 The /noupdate option is now undocumented but still supported for
1292 backwards compatibility. It is equivalent to /readonly except that in
1293 ACLs where /readonly is required you may specify /leaky/noupdate or
1294 /strict/noupdate which are treated the same as /readonly.
1296 A useful new feature is the /count= option. This is a generalization
1297 of the per_byte option, so that you can measure the throughput of other
1298 aggregate values. For example, the per_byte option is now equivalent
1299 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1301 The per_rcpt option has been generalized using the /count= mechanism
1302 (though it's more complicated than the per_byte equivalence). When it is
1303 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1304 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1305 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1306 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1307 Note that using per_rcpt with a non-readonly update mode in more than
1308 one ACL will cause the recipients to be double-counted. (The per_mail
1309 and per_byte options don't have this problem.)
1311 The handling of very low rates has changed slightly. If the computed rate
1312 is less than the event's count (usually one) then this event is the first
1313 after a long gap. In this case the rate is set to the same as this event's
1314 count, so that the first message of a spam run is counted properly.
1316 The major new feature is a mechanism for counting the rate of unique
1317 events. The new per_addr option counts the number of different
1318 recipients that someone has sent messages to in the last time period. It
1319 behaves like per_rcpt if all the recipient addresses are different, but
1320 duplicate recipient addresses do not increase the measured rate. Like
1321 the /count= option this is a general mechanism, so the per_addr option
1322 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1323 example, measure the rate that a client uses different sender addresses
1324 with the options per_mail/unique=$sender_address. There are further
1325 details in the main documentation.
1327 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1329 TF/06 Removed a few PCRE remnants.
1331 TF/07 Automatically extract Exim's version number from tags in the git
1332 repository when doing development or release builds.
1334 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1335 Bugzilla 879. Patch from Paul Fisher.
1337 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1338 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1341 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1343 PP/05 Variable $av_failed, true if the AV scanner deferred.
1344 Bugzilla 1078. Patch from John Horne.
1346 PP/06 Stop make process more reliably on build failure.
1347 Bugzilla 1087. Patch from Heiko Schlittermann.
1349 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1350 Bugzilla 1089. Patch from Heiko Schlittermann.
1352 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1353 Bugzilla 1131. Patch from Holger Weiß.
1355 PP/09 Handle IPv6 addresses with SPF.
1356 Bugzilla 860. Patch from Wolfgang Breyha.
1358 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1360 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1363 PP/11 match_* no longer expand right-hand-side by default.
1364 New compile-time build option, EXPAND_LISTMATCH_RHS.
1365 New expansion conditions, "inlist", "inlisti".
1367 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1369 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1371 PP/14 fix log_write() format string regression from TF/03.
1372 Bugzilla 1152. Patch from Dmitry Isaikin.
1378 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1380 PP/02 Harmonised TLS library version reporting; only show if debugging.
1381 Layout now matches that introduced for other libraries in 4.74 PP/03.
1383 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1385 PP/04 New "dns_use_edns0" global option.
1387 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1390 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1391 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1393 TK/01 Updated PolarSSL code to 0.14.2.
1394 Bugzilla 1097. Patch from Andreas Metzler.
1396 PP/07 Catch divide-by-zero in ${eval:...}.
1397 Fixes bugzilla 1102.
1399 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1402 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1403 format-string attack -- SECURITY: remote arbitrary code execution.
1405 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1406 time unintentionally subject to list matching rules, letting the header
1407 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1408 arbitrary string expansion). This allowed for information disclosure.
1410 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1411 INT_MIN/-1 -- value coerced to INT_MAX.
1417 NM/01 Workaround for PCRE version dependency in version reporting
1420 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1421 This fixes portability to compilers other than gcc, notably
1422 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1424 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1425 makefiles for portability to HP-UX and POSIX correctness.
1427 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1428 Also via indented variable definition in the Makefile.
1429 (Debugging by Oliver Heesakkers).
1431 PP/02 Restore caching of spamd results with expanded spamd_address.
1432 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1434 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1435 Improves build reliability. Fix from: Frank Elsner
1437 NM/02 Fix wide character breakage in the rfc2047 coding
1438 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1440 NM/03 Allow underscore in dnslist lookups
1441 Fixes bug 1026. Patch from Graeme Fowler
1443 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1444 Code patches from Adam Ciarcinski of NetBSD.
1446 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1449 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1450 is logged, to avoid truncation. Patch from John Horne.
1452 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1453 Patch from Jakob Hirsch.
1455 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1456 SQL string expansion failure details.
1457 Patch from Andrey Oktyabrski.
1459 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1460 Patch from Simon Arlott.
1462 PP/09 New lookups functionality failed to compile on old gcc which rejects
1463 extern declarations in function scope.
1464 Patch from Oliver Fleischmann
1466 PP/10 Use sig_atomic_t for flags set from signal handlers.
1467 Check getgroups() return and improve debugging.
1468 Fixed developed for diagnosis in bug 927 (which turned out to be
1471 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1472 Patch from Mark Zealey.
1474 PP/12 Bugzilla 1056: Improved spamd server selection.
1475 Patch from Mark Zealey.
1477 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1478 Based on patch from Heiko Schlittermann.
1480 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1481 Patch from Uwe Doering, sign-off by Michael Haardt.
1483 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1484 variable declaration deep within a block. Bug and patch from
1487 PP/15 lookups-Makefile IRIX compatibility coercion.
1489 PP/16 Make DISABLE_DKIM build knob functional.
1491 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1492 Patch by Simon Arlott
1494 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1495 variable argument macros. Our copy now differs from upstream.
1501 TF/01 Failure to get a lock on a hints database can have serious
1502 consequences so log it to the panic log.
1504 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1505 controlled using the smtp_confirmation log selector.
1507 TF/03 Include the error message when we fail to unlink a spool file.
1509 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1510 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1511 for maintaining out-of-tree patches for some time.
1513 PP/01 Bugzilla 139: Documentation and portability issues.
1514 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1515 Handle per-OS dynamic-module compilation flags.
1517 PP/02 Let /dev/null have normal permissions.
1518 The 4.73 fixes were a little too stringent and complained about the
1519 permissions on /dev/null. Exempt it from some checks.
1520 Reported by Andreas M. Kirchwitz.
1522 PP/03 Report version information for many libraries, including
1523 Exim version information for dynamically loaded libraries. Created
1524 version.h, now support a version extension string for distributors
1525 who patch heavily. Dynamic module ABI change.
1527 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1528 privilege escalation vulnerability whereby the Exim run-time user
1529 can cause root to append content of the attacker's choosing to
1532 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1535 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1536 If dropping privileges for untrusted macros, we disabled normal logging
1537 on the basis that it would fail; for the Exim run-time user, this is not
1538 the case, and it resulted in successful deliveries going unlogged.
1539 Fixed. Reported by Andreas Metzler.
1545 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1546 only prepend for the Resent-* case. Fixes regression introduced in
1547 Exim 4.70 by NM/22 for Bugzilla 607.
1549 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1550 increasing numbers of administrators be bitten by this.
1552 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1554 PP/03 Bugzilla 994: added openssl_options main configuration option.
1556 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1558 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1560 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1562 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1563 without a peer certificate, leading to a segfault because of an
1564 assumption that peers always have certificates. Be a little more
1565 paranoid. Problem reported by Martin Tscholak.
1567 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1568 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1569 NB: ClamAV planning to remove STREAM in "middle of 2010".
1570 CL also introduces -bmalware, various -d+acl logging additions and
1571 more caution in buffer sizes.
1573 PP/09 Implemented reverse_ip expansion operator.
1575 PP/10 Bugzilla 937: provide a "debug" ACL control.
1577 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1579 PP/12 Bugzilla 973: Implement --version.
1581 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1583 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1585 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1587 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1588 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1589 ignore trailing whitespace.
1591 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1593 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1596 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1597 Notification from Dr Andrew Aitchison.
1599 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1600 ExtendedDetectionInfo response format.
1601 Notification from John Horne.
1603 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1606 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1607 XSL and documented dependency on system catalogs, with examples of how
1610 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1613 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1614 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1615 configuration file which is writeable by the Exim user or group.
1617 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1618 of configuration files to cover files specified with the -C option if
1619 they are going to be used with root privileges, not just the default
1622 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1623 option (effectively making it always true).
1625 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1626 files to be used while preserving root privileges.
1628 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1629 that rogue child processes cannot use them.
1631 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1632 run-time user, instead of root.
1634 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1635 Exim run-time user without dropping privileges.
1637 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1638 result string, instead of calling string_vformat() twice with the same
1641 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1642 for other users. Others should always drop root privileges if they use
1643 -C on the command line, even for a whitelisted configure file.
1645 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1647 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1653 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1654 $data_path, and $header_path variables; fixed documentation bugs and
1657 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1658 exipick to access non-standard spools, including the "frozen" queue
1661 NM/01 Bugzilla 965: Support mysql stored procedures.
1662 Patch from Alain Williams
1664 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1666 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1667 Patch from Andreas Metzler
1669 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1670 Patch from Kirill Miazine
1672 NM/05 Bugzilla 671: Added umask to procmail example.
1674 JJ/03 installed exipick 20100323.0, fixing doc bug
1676 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1677 directory. Notification and patch from Dan Rosenberg.
1679 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1681 TK/02 Improve log output when DKIM signing operation fails.
1683 MH/01 Treat the transport option dkim_domain as a colon separated
1684 list, not as a single string, and sign the message with each element,
1685 omitting multiple occurences of the same signer.
1687 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1688 Bugzilla 985, 986. Patch by Simon Arlott
1690 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1691 Patch by Simon Arlott
1693 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1694 MBX locking. Notification from Dan Rosenberg.
1700 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1702 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1704 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1706 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1708 NM/04 Bugzilla 915: Flag broken perl installation during build.
1714 TK/01 Added patch by Johannes Berg that expands the main option
1715 "spamd_address" if it starts with a dollar sign.
1717 TK/02 Write list of recipients to X-Envelope-Sender header when building
1718 the mbox-format spool file for content scanning (suggested by Jakob
1721 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1722 (http://www.dcc-servers.net/) support via dccifd. Activated by
1723 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1725 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1726 by Mark Daniel Reidel <mr@df.eu>.
1728 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1729 When building exim an external PCRE library is now needed -
1730 PCRE is a system library on the majority of modern systems.
1731 See entry on PCRE_LIBS in EDITME file.
1733 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1734 conversation. Added nologin parameter to request.
1735 Patch contributed by Kirill Miazine.
1737 TF/01 Do not log submission mode rewrites if they do not change the address.
1739 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1741 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1742 log files in place. Contributed by Roberto Lima.
1744 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1746 TF/03 Bugzilla 615: When checking the local_parts router precondition
1747 after a local_part_suffix or local_part_prefix option, Exim now
1748 does not use the address's named list lookup cache, since this
1749 contains cached lookups for the whole local part.
1751 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1752 Robert Millan. Documentation is in experimental-spec.txt.
1754 TF/04 Bugzilla 668: Fix parallel build (make -j).
1756 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1758 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1759 Patch provided by Jan Srzednicki.
1761 TF/05 Leading white space used to be stripped from $spam_report which
1762 wrecked the formatting. Now it is preserved.
1764 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1765 that they are available at delivery time.
1767 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1769 TF/08 TLS error reporting now respects the incoming_interface and
1770 incoming_port log selectors.
1772 TF/09 Produce a more useful error message if an SMTP transport's hosts
1773 setting expands to an empty string.
1775 NM/06 Bugzilla 744: EXPN did not work under TLS.
1776 Patch provided by Phil Pennock.
1778 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1779 Patch provided by Richard Godbee.
1781 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1782 acl_smtp_notquit, added index entry.
1784 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1785 Patch provided by Eugene Bujak.
1787 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1788 accept(). Patch provided by Maxim Dounin.
1790 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1791 Patch provided by Phil Pennock.
1793 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1795 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1796 Patch provided by Brad "anomie" Jorsch.
1798 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1799 Patch provided by Dean Brooks.
1801 TK/05 Add native DKIM support (does not depend on external libraries).
1803 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1804 Patch provided by Graeme Fowler.
1806 NM/16 Bugzilla 851: Documentation example syntax fix.
1808 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1810 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1813 NM/19 Bugzilla 745: TLS version reporting.
1814 Patch provided by Phil Pennock.
1816 NM/20 Bugzilla 167: bool: condition support.
1817 Patch provided by Phil Pennock.
1819 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1820 clients. Patch provided by Phil Pennock.
1822 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1823 Patch provided by Brad "anomie" Jorsch.
1825 NM/23 Bugzilla 687: Fix misparses in eximstats.
1826 Patch provided by Heiko Schlittermann.
1828 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1829 Patch provided by Heiko Schlittermann.
1831 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1832 plus update to original patch.
1834 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1836 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1837 Patch provided by David Brownlee.
1839 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1841 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1843 NM/30 Bugzilla 888: TLS documentation bugfixes.
1845 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1847 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1848 Unlike the original bugzilla I have changed all shell scripts in src tree.
1850 NM/33 Bugzilla 898: Transport filter timeout fix.
1851 Patch by Todd Rinaldo.
1853 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1854 Patch by Serge Demonchaux.
1856 NM/35 Bugzilla 39: Base64 decode bug fixes.
1857 Patch by Jakob Hirsch.
1859 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1861 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1863 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1865 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1871 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1872 ALT-N's libdkim that I have put here:
1873 http://duncanthrax.net/exim-experimental/
1875 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1876 were called 'true' and it seems that C99 defines that as a reserved
1877 keyword to be used with 'bool' variable types. That means you could
1878 not include C99-style headers which use bools without triggering
1879 build errors in sieve.c.
1881 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1882 as mailq or other aliases. Changed the --help handling significantly
1883 to do whats expected. exim_usage() emits usage/help information.
1885 SC/01 Added the -bylocaldomain option to eximstats.
1887 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1889 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1891 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1897 PH/01 Another patch from the Sieve maintainer.
1899 PH/02 When an IPv6 address is converted to a string for single-key lookup
1900 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1901 dots are used instead of colons so that keys in lsearch files need not
1902 contain colons. This was done some time before quoting was made available
1903 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1904 (notated using the quote facility) so as to distinguish them from IPv4
1905 keys. This meant that lookups for IP addresses in host lists did not work
1906 for iplsearch lookups.
1908 This has been fixed by arranging for IPv6 addresses to be expressed with
1909 colons if the lookup type is iplsearch. This is not incompatible, because
1910 previously such lookups could never work.
1912 The situation is now rather anomalous, since one *can* have colons in
1913 ordinary lsearch keys. However, making the change in all cases is
1914 incompatible and would probably break a number of configurations.
1916 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1919 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1920 conversion specification without a maximum field width, thereby enabling
1921 a rogue spamd server to cause a buffer overflow. While nobody in their
1922 right mind would setup Exim to query an untrusted spamd server, an
1923 attacker that gains access to a server running spamd could potentially
1924 exploit this vulnerability to run arbitrary code as the Exim user.
1926 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1927 $primary_hostname instead of what libspf2 thinks the hosts name is.
1929 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1930 a directory entry by the name of the lookup key. Previously, if a
1931 symlink pointed to a non-existing file or a file in a directory that
1932 Exim lacked permissions to read, a lookup for a key matching that
1933 symlink would fail. Now it is enough that a matching directory entry
1934 exists, symlink or not. (Bugzilla 503.)
1936 PH/03 The body_linecount and body_zerocount variables are now exported in the
1939 PH/04 Added the $dnslist_matched variable.
1941 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1942 This means they are set thereafter only if the connection becomes
1945 PH/06 Added the client_condition to authenticators so that some can be skipped
1946 by clients under certain conditions.
1948 PH/07 The error message for a badly-placed control=no_multiline_responses left
1949 "_responses" off the end of the name.
1951 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1953 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1954 (without spaces) instead of just copying the configuration text.
1956 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1958 PH/11 Added $max_received_linelength.
1960 PH/12 Added +ignore_defer and +include_defer to host lists.
1962 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1963 way in which PCRE > 7.0 is built.
1965 PH/14 Implemented queue_only_load_latch.
1967 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1968 MAIL command. The effect was to mangle the value on 64-bit systems.
1970 PH/16 Another patch from the Sieve maintainer.
1972 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1974 PH/18 If a system quota error occurred while trying to create the file for
1975 a maildir delivery, the message "Mailbox is full" was not appended to the
1976 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1977 only to a quota excession during the actual writing of the file.
1979 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1980 characters?) which causes problems in log lines. The DN values are now
1981 passed through string_printing() before being added to log lines.
1983 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1984 and InterBase are left for another time.)
1986 PH/21 Added message_body_newlines option.
1988 PH/22 Guard against possible overflow in moan_check_errorcopy().
1990 PH/23 POSIX allows open() to be a macro; guard against that.
1992 PH/24 If the recipient of an error message contained an @ in the local part
1993 (suitably quoted, of course), incorrect values were put in $domain and
1994 $local_part during the evaluation of errors_copy.
2000 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2001 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2004 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2005 issue a MAIL command.
2007 PH/02 In an ACL statement such as
2009 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2011 if a client was not listed at all, or was listed with a value other than
2012 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2013 the condition was not true (as it should be), so access was not denied.
2014 The bug was that the ! inversion was incorrectly passed on to the second
2015 item. This has been fixed.
2017 PH/03 Added additional dnslists conditions == and =& which are different from
2018 = and & when the dns lookup returns more than one IP address.
2020 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2021 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2023 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2024 FSYNC, which compiles an option called disable_fsync that allows for
2025 bypassing fsync(). The documentation is heavily laced with warnings.
2027 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2029 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2030 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2031 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2032 including adding "make clean"; (3) Added -fPIC when compiling the test
2033 dynamically loaded module, to get rid of a warning.
2035 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2036 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2037 = 0s. The bug is otherwise harmless.
2039 PH/07 There was a bug in the dovecot authenticator such that the value of
2040 $auth1 could be overwritten, and so not correctly preserved, after a
2041 successful authentication. This usually meant that the value preserved by
2042 the server_setid option was incorrect.
2044 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2046 PH/09 Installed PCRE release 7.0.
2048 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2049 run for batched SMTP input. It is now run at the start of every message
2050 in the batch. While fixing this I discovered that the process information
2051 (output by running exiwhat) was not always getting set for -bs and -bS
2052 input. This is fixed, and it now also says "batched" for BSMTP.
2054 PH/11 Added control=no_pipelining.
2056 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2057 patch, slightly modified), and move the expansion of helo_data till after
2058 the connection is made in the smtp transport (so it can use these
2061 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2063 PH/14 Added log_selector = +pid.
2065 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2067 PH/16 Add ${if forany and ${if forall.
2069 PH/17 Added dsn_from option to vary the From: line in DSNs.
2071 PH/18 Flush SMTP output before performing a callout, unless control =
2072 no_callout_flush is set.
2074 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2075 was true (the default) a successful delivery failed to delete the retry
2076 item, thus causing premature timeout of the address. The bug is now
2079 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2081 PH/21 Long custom messages for fakedefer and fakereject are now split up
2082 into multiline responses in the same way that messages for "deny" and
2083 other ACL rejections are.
2085 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2086 with slight modification.
2088 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2089 draft, changing the syntax and factoring some duplicate code".
2091 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2092 for deliveries of the second and subsequent messages over the same SMTP
2095 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2096 ${reduce, with only minor "tidies".
2098 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2100 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2101 expansion side effects.
2103 PH/27 When a message times out after an over-quota error from an Exim-imposed
2104 quota, the bounce message says "mailbox is full". This message was not
2105 being given when it was a system quota that was exceeded. It now should
2108 MH/03 Made $recipients available in local_scan(). local_scan() already has
2109 better access to the recipient list through recipients_list[], but
2110 $recipients can be useful in postmaster-provided expansion strings.
2112 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2113 in the case of a MAIL command with additional options following the
2114 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2115 were accidentally chopped off.
2117 PH/29 SMTP synchronization checks are implemented when a command is read -
2118 there is a check that no more input is waiting when there shouldn't be
2119 any. However, for some commands, a delay in an ACL can mean that it is
2120 some time before the response is written. In this time, more input might
2121 arrive, invalidly. So now there are extra checks after an ACL has run for
2122 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2123 pipelining has not been advertised.
2125 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2127 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2128 returned in the SMTP response when smtp_return_error_details was false.
2129 This has been fixed.
2131 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2132 instead of the C I/O that was originally supplied, because problems were
2133 reported on Solaris.
2135 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2136 Exim which did not show up earlier: it was assuming that a call to
2137 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2138 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2139 was a macro that became an assignment, so it seemed to work. This has
2140 changed to a proper function call with a void return, hence the compile
2141 error. Exim's code has been fixed.
2143 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2146 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2148 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2150 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2151 because it turns out to be too big or there is a timeout) there is no
2152 "Completed" line in the log. When some messages of this type were
2153 selected by exigrep, they were listed as "not completed". Others were
2154 picked up by some special patterns. I have improved the selection
2155 criteria to be more general.
2157 PH/38 The host_find_failed option in the manualroute router can now be set
2158 to "ignore", to completely ignore a host whose IP address cannot be
2159 found. If all hosts are ignored, the behaviour is controlled by the new
2160 host_all_ignored option.
2162 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2163 homing or because of multiple MX records with /mx) generated more than
2164 one IP address, and the following item turned out to be the local host,
2165 all the secondary addresses of the first item were incorrectly removed
2166 from the list, along with the local host and any following hosts (which
2167 is what is supposed to happen).
2169 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2170 whoever called Exim into the -H file. In the case of the daemon it was
2171 behaving confusingly. When first started, it used values for whoever
2172 started the daemon, but after a SIGHUP it used the Exim user (because it
2173 calls itself on a restart). I have changed the code so that it now always
2176 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2177 message are rejected with the same error (e.g. no authentication or bad
2178 sender address), and a DATA command is nevertheless sent (as can happen
2179 with PIPELINING or a stupid MUA), the error message that was given to the
2180 RCPT commands is included in the rejection of the DATA command. This is
2181 intended to be helpful for MUAs that show only the final error to their
2184 PH/42 Another patch from the Sieve maintainer.
2186 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2187 Eximstats - Fixed some broken HTML links and added missing column headers
2189 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2190 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2192 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2194 PH/43 Yet another patch from the Sieve maintainer.
2196 PH/44 I found a way to check for a TCP/IP connection going away before sending
2197 the response to the final '.' that terminates a message, but only in the
2198 case where the client has not sent further data following the '.'
2199 (unfortunately, this is allowed). However, in many cases there won't be
2200 any further data because there won't be any more messages to send. A call
2201 to select() can be used: if it shows that the input is "ready", there is
2202 either input waiting, or the socket has been closed. An attempt to read
2203 the next input character can distinguish the two cases. Previously, Exim
2204 would have sent an OK response which the client would never have see.
2205 This could lead to message repetition. This fix should cure that, at
2206 least in a lot of common cases.
2208 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2209 advertised in response to EHLO.
2215 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2216 fixed by 4.65/MH/01 (is this a record?) are fixed:
2218 (i) An empty string was always treated as zero by the numeric comparison
2219 operators. This behaviour has been restored.
2221 (ii) It is documented that the numeric comparison operators always treat
2222 their arguments as decimal numbers. This was broken in that numbers
2223 starting with 0 were being interpreted as octal.
2225 While fixing these problems I realized that there was another issue that
2226 hadn't been noticed. Values of message_size_limit (both the global option
2227 and the transport option) were treated as octal if they started with 0.
2228 The documentation was vague. These values are now always treated as
2229 decimal, and I will make that clear in the documentation.
2235 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2236 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2239 MH/01 Don't check that the operands of numeric comparison operators are
2240 integers when their expansion is in "skipping" mode (fixes bug
2241 introduced by 4.64-PH/07).
2243 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2244 child addresses, Exim now panics and dies. Previously, because the count
2245 is held in a short int, deliveries were likely to be lost. As such a
2246 large number of recipients for a single message is ridiculous
2247 (performance will be very, very poor), I have chosen to impose a limit
2248 rather than extend the field.
2254 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2255 leftover -K file (the existence of which was triggered by #402).
2256 While we were at it, introduced process PID as part of the -K
2257 filename. This should rule out race conditions when creating
2260 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2261 processing considerably. Previous code took too long for large mails,
2262 triggering a timeout which in turn triggers #401.
2264 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2265 in the DK code in transports.c. sendfile() is not really portable,
2266 hence the _LINUX specificness.
2268 TF/01 In the add_headers option to the mail command in an Exim filter,
2269 there was a bug that Exim would claim a syntax error in any
2270 header after the first one which had an odd number of characters
2273 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2274 callout verification, Exim cached a "reject" for the entire domain. This
2275 is correct for most verifications, but it is not correct for a recipient
2276 verification with use_sender or use_postmaster set, because in that case
2277 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2278 case of MAIL FROM:<> rejection from other early rejections (e.g.
2279 rejection of HELO). When verifying a recipient using a non-null MAIL
2280 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2281 Whatever the result of the callout, the value of the domain cache is
2282 left unchanged (for any other kind of callout, getting as far as trying
2283 RCPT means that the domain itself is ok).
2285 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2288 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2289 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2290 session, the daemon ignores ECONNECT errors and logs others; it now
2291 ignores EPIPE as well.
2293 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2294 (quoted-printable decoding).
2296 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2297 later the small subsequent patch to fix an introduced bug.
2299 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2301 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2303 PH/08 An error is now given if message_size_limit is specified negative.
2305 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2306 to be given (somewhat) arbitrary names.
2308 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2311 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2312 miscellaneous code fixes
2314 PH/10 Added the log_reject_target ACL modifier to specify where to log
2317 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2318 hostname. This is wrong, because it relates to the incoming message (and
2319 probably the interface on which it is arriving) and not to the outgoing
2320 callout (which could be using a different interface). This has been
2321 changed to use the value of the helo_data option from the smtp transport
2322 instead - this is what is used when a message is actually being sent. If
2323 there is no remote transport (possible with a router that sets up host
2324 addresses), $smtp_active_hostname is used.
2326 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2327 tweaks were necessary in order to get it to work (see also 21 below):
2328 (a) The code assumed that strncpy() returns a negative number on buffer
2329 overflow, which isn't the case. Replaced with Exim's string_format()
2331 (b) There were several signed/unsigned issues. I just did the minimum
2332 hacking in of casts. There is scope for a larger refactoring.
2333 (c) The code used strcasecmp() which is not a standard C function.
2334 Replaced with Exim's strcmpic() function.
2335 (d) The code set only $1; it now sets $auth1 as well.
2336 (e) A simple test gave the error "authentication client didn't specify
2337 service in request". It would seem that Dovecot has changed its
2338 interface. Fortunately there's a specification; I followed it and
2339 changed what the client sends and it appears to be working now.
2341 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2344 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2345 address A is aliased to B and C, where B exists and C does not. Without
2346 -v the output is "A verified" because verification stops after a
2347 successful redirection if more than one address is generated. However,
2348 with -v the child addresses are also verified. Exim was outputting "A
2349 failed to verify" and then showing the successful verification for C,
2350 with its parentage. It now outputs "B failed to verify", showing B's
2351 parentage before showing the successful verification of C.
2353 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2354 look up a TXT record in a specific list after matching in a combined
2357 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2358 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2359 they consult the DNS. I had assumed they would set it the way they
2360 wanted; and indeed my experiments on Linux seem to show that in some
2361 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2362 To be on the safe side, however, I have now made the interface to
2363 host_find_byname() similar to host_find_bydns(), with an argument
2364 containing the DNS resolver options. The host_find_byname() function now
2365 sets these options at its start, just as host_find_bydns() does. The smtp
2366 transport options dns_qualify_single and dns_search_parents are passed to
2367 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2368 of host_find_byname() use the default settings of RES_DEFNAMES
2369 (qualify_single) but not RES_DNSRCH (search_parents).
2371 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2372 spool_read_header() do less string testing, by means of a preliminary
2373 switch on the second character of optional "-foo" lines. (This is
2374 overdue, caused by the large number of possibilities that now exist.
2375 Originally there were few.) While I was there, I also converted the
2376 str(n)cmp tests so they don't re-test the leading "-" and the first
2377 character, in the hope this might squeeze out yet more improvement.
2379 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2380 flag allowing group syntax was set by the header_syntax check but not
2381 turned off, possible causing trouble later; (2) The flag was not being
2382 set at all for the header_verify test, causing "group"-style headers to
2383 be rejected. I have now set it in this case, and also caused header_
2384 verify to ignore an empty address taken from a group. While doing this, I
2385 came across some other cases where the code for allowing group syntax
2386 while scanning a header line wasn't quite right (mostly, not resetting
2387 the flag correctly in the right place). These bugs could have caused
2388 trouble for malformed header lines. I hope it is now all correct.
2390 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2391 with the "reply" argument non-NULL. The code, however (which originally
2392 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2393 but it didn't always do it. This confused somebody who was copying the
2394 code for some other use. I have removed all the tests.
2396 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2397 feature that was used to support insecure browsers during the U.S. crypto
2398 embargo. It requires special client support, and Exim is probably the
2399 only MTA that supported it -- and would never use it because real RSA is
2400 always available. This code has been removed, because it had the bad
2401 effect of slowing Exim down by computing (never used) parameters for the
2402 RSA_EXPORT functionality.
2404 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2405 authenticator to fail if there's a tab character in the incoming data
2406 (there should never be unless someone is messing about, as it's supposed
2407 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2408 if the connection is using TLS or if the remote IP is the same as the
2409 local IP, and the "valid-client-cert option" if a client certificate has
2412 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2413 authenticators. This can be used for authorization after authentication
2414 succeeds. (In the case of plaintext, it servers for both authentication
2417 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2418 if any retry times were supplied.
2420 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2421 connection, where there is no client IP address to check. In this
2422 situation, the verify now always succeeds.
2424 PH/25 Applied John Jetmore's -Mset patch.
2426 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2428 PH/27 In a string expansion for a processed (not raw) header when multiple
2429 headers of the same name were present, leading whitespace was being
2430 removed from all of them, but trailing whitespace was being removed only
2431 from the last one. Now trailing whitespace is removed from each header
2432 before concatenation. Completely empty headers in a concatenation (as
2433 before) are ignored.
2435 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2436 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2438 PH/29 [Removed. This was a change that I later backed out, and forgot to
2439 correct the ChangeLog entry (that I had efficiently created) before
2440 committing the later change.]
2442 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2443 address errors (4xx response to RCPT) over the same connection as other
2444 messages routed to the same hosts. Such deliveries are always "forced",
2445 so retry times are not inspected. This resulted in far too many retries
2446 for the affected addresses. The effect occurred only when there were more
2447 hosts than the hosts_max_try setting in the smtp transport when it had
2448 the 4xx errors. Those hosts that it had tried were not added to the list
2449 of hosts for which the message was waiting, so if all were tried, there
2450 was no problem. Two fixes have been applied:
2452 (i) If there are any address or message errors in an SMTP delivery, none
2453 of the hosts (tried or untried) are now added to the list of hosts
2454 for which the message is waiting, so the message should not be a
2455 candidate for sending over the same connection that was used for a
2456 successful delivery of some other message. This seems entirely
2457 reasonable: after all the message is NOT "waiting for some host".
2458 This is so "obvious" that I'm not sure why it wasn't done
2459 previously. Hope I haven't missed anything, but it can't do any
2460 harm, as the worst effect is to miss an optimization.
2462 (ii) If, despite (i), such a delivery is accidentally attempted, the
2463 routing retry time is respected, so at least it doesn't keep
2464 hammering the server.
2466 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2467 in ${readsocket because some servers need this prod.
2469 PH/32 Added some extra debug output when updating a wait-xxx database.
2471 PH/33 The hint "could be header name not terminated by colon", which has been
2472 given for certain expansion errors for a long time, was not being given
2473 for the ${if def:h_colon_omitted{... case.
2475 PH/34 The spec says: "With one important exception, whenever a domain list is
2476 being scanned, $domain contains the subject domain." There was at least
2477 one case where this was not true.
2479 PH/35 The error "getsockname() failed: connection reset by peer" was being
2480 written to the panic log as well as the main log, but it isn't really
2481 panic-worthy as it just means the connection died rather early on. I have
2482 removed the panic log writing for the ECONNRESET error when getsockname()
2485 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2486 runs only) independently of the message's sender address. This meant
2487 that, if the 4xx error was in fact related to the sender, a different
2488 message to the same recipient with a different sender could confuse
2489 things. In particular, this can happen when sending to a greylisting
2490 server, but other circumstances could also provoke similar problems.
2491 I have changed the default so that the retry time for these errors is now
2492 based a combination of the sender and recipient addresses. This change
2493 can be overridden by setting address_retry_include_sender=false in the
2496 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2497 remote server are returned as part of bounce messages. This was not
2498 happening for LMTP over a pipe (the lmtp transport), but now it is the
2499 same for both kinds of LMTP.
2501 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2502 in header lines that were in fact CNAMEs. This is no longer the case.
2504 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2505 and queue runs started by the daemon processed all messages. This has
2506 been fixed so that -R and -S can now usefully be given with -q<time>.
2508 PH/40 Import PCRE release 6.7 (fixes some bugs).
2510 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2512 PH/42 Give an error if -q is specified more than once.
2514 PH/43 Renamed the variables $interface_address and $interface_port as
2515 $received_ip_address and $received_port, to make it clear that these
2516 values apply to message reception, and not to the outgoing interface when
2517 a message is delivered. (The old names remain recognized, of course.)
2519 PH/44 There was no timeout on the connect() call when using a Unix domain
2520 socket in the ${readsocket expansion. There now is.
2522 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2523 be meaningful with "accept".
2525 SC/01 Eximstats V1.43
2526 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2528 SC/02 Eximstats V1.44
2529 Use a glob alias rather than an array ref in the generated
2530 parser. This improves both readability and performance.
2532 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2533 Collect SpamAssassin and rejection statistics.
2534 Don't display local sender or destination tables unless
2535 there is data to show.
2536 Added average volumes into the top table text output.
2538 SC/04 Eximstats V1.46
2539 Collect data on the number of addresses (recipients)
2540 as well as the number of messages.
2542 SC/05 Eximstats V1.47
2543 Added 'Message too big' to the list of mail rejection
2544 reasons (thanks to Marco Gaiarin).
2546 SC/06 Eximstats V1.48
2547 Mainlog lines which have GMT offsets and are too short to
2548 have a flag are now skipped.
2550 SC/07 Eximstats V1.49 (Alain Williams)
2551 Added the -emptyok flag.
2553 SC/08 Eximstats V1.50
2554 Fixes for obtaining the IP address from reject messages.
2556 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2557 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2558 whitespace changes from 4.64-PH/27
2560 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2563 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2564 are found, allow negative numbers in numeric criteria)
2566 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2568 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2569 to match changes made in 4.64-PH/43
2571 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2573 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2574 "domain" is actually an IP address, and force a failure. This locks out
2575 those revolvers/nameservers that support "A-for-A" lookups, in
2576 contravention of the specifications.
2578 PH/48 When a host name was looked up from an IP address, and the subsequent
2579 forward lookup of the name timed out, the host name was left in
2580 $sender_host_name, contrary to the specification.
2582 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2583 restricted to single-key lookups, Exim was not diagnosing an error if
2584 * or *@ was used with a query-style lookup.
2586 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2588 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2589 long ago, but noone interested enough thought of it. Let's just say that
2590 the "1.1" means that there are some new functions that weren't there at
2591 some point in the past.
2593 PH/51 Error processing for expansion failure of helo_data from an smtp
2594 transport during callout processing was broken.
2596 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2597 tested/used via the -bh/-bhc/-bs options.
2599 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2600 bug, fixed in subsequent PCRE releases).
2602 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2603 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2605 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2611 SC/01 Use a glob alias rather than an array ref in eximstats generated
2612 parser. This improves both readability and performance.
2614 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2615 Don't display local sender or destination tables in eximstats unless
2616 there is data to show.
2617 Added average volumes into the eximstats top table text output.
2619 SC/03 Collect data on the number of addresses (recipients) as well
2620 as the number of messages in eximstats.
2622 TF/01 Correct an error in the documentation for the redirect router. Exim
2623 does (usually) call initgroups() when daemonizing.
2625 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2626 with consistent privilege compared to when running as a daemon.
2628 TF/03 Note in the spec that $authenticated_id is not set for local
2629 submissions from trusted users.
2631 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2632 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2634 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2635 by adding some example configuration directives to the default
2636 configuration file. A little bit of work is required to uncomment the
2637 directives and define how usernames and passwords are checked, but
2638 there is now a framework to start from.
2640 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2641 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2642 without this. I don't know how relevant this is to other LDAP libraries.
2644 PH/02 Add the verb name to the "unknown ACL verb" error.
2646 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2648 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2650 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2651 directory not expanded when it should be if an expanded home directory
2652 was set for the address (which is overridden by the transport).
2654 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2657 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2658 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2659 because it is too late at that time, and has no effect.
2661 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2662 security issue with \' (bugzilla #107). I could not use the
2663 PQescapeStringConn() function, because it needs a PGconn value as one of
2666 PH/08 When testing addresses using -bt, indicate those final addresses that
2667 are duplicates that would not cause an additional delivery. At least one
2668 person was confused, thinking that -bt output corresponded to deliveries.
2669 (Suppressing duplicates isn't a good idea as you lose the information
2670 about possibly different redirections that led to the duplicates.)
2672 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2673 systems where poll() doesn't work, in particular OS X.
2675 PH/10 Added more information to debugging output for retry time not reached.
2677 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2678 operations in malware.c.
2680 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2683 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2684 syslog_duplication set false, log lines that would normally be written
2685 both the the main log and to the reject log were not written to syslog at
2688 PH/14 In the default configuration, change the use of "message" in ACL warn
2689 statements to "add_header".
2691 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2692 not followed by a command (e.g. "seen endif").
2694 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2695 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2698 PH/17 Added extra conditions to the default value of delay_warning_condition
2702 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2703 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2704 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2707 The Auto-Submitted: and various List- headers are standardised, whereas I
2708 don't think Precedence: ever was.
2710 PH/18 Refactored debugging code in route_finduser() to show more information,
2711 in particular, the error code if getpwnam() issues one.
2713 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2714 This is apparently needed in addition to the PH/07 change above to avoid
2715 any possible encoding problems.
2717 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2718 but not after initializing Perl.
2720 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2721 output them only if debugging. By default they are written stderr,
2722 apparently, which is not desirable.
2724 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2727 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2730 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2732 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2733 authenticated or an ident call has been made. Suppress the default
2734 values for $authenticated_id and $authenticated_sender (but permit -oMai
2735 and -oMas) when testing with -bh.
2737 PH/24 Re-jigged the order of the tests in the default configuration so that the
2738 tests for valid domains and recipients precede the DNS black list and CSA
2739 tests, on the grounds that those ones are more expensive.
2741 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2742 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2743 This bug exists in every version of Exim that I still have, right back to
2746 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2747 However, an attempt to turn on case-sensitivity in a regex key by
2748 including (?-i) didn't work because the subject string was already
2749 lowercased, and the effects were non-intuitive. It turns out that a
2750 one-line patch can be used to allow (?-i) to work as expected.
2756 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2757 other effects) broke the use of negated acl sub-conditions.
2759 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2762 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2763 "Deny" causes Exim to reject the incoming connection with a 554 error.
2764 Unfortunately, if there is a major crisis, such as a disk failure,
2765 tcp-wrappers gives "deny", whereas what one would like would be some
2766 kind of temporary error. A kludge has been added to help with this.
2767 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2768 554 error is used if errno is still zero or contains ENOENT (which occurs
2769 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2772 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2774 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2775 errors. Otherwise a message that provokes a temporary error (when other
2776 messages do not) can cause a whole host to time out.
2778 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2779 addresses were routed directly to files or pipes from a redirect router.
2780 File deliveries just didn't batch; pipe deliveries might have suffered
2783 PH/06 A failure to get a lock for a hints database would erroneously always say
2784 "Failed to get write lock", even when it was really a read lock.
2786 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2787 of 0600. This has been changed to use the value of the lockfile_mode
2788 option (which defaults to 0600).
2790 PH/08 Applied small patch from the Sieve maintainer.
2792 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2793 folder from quota calculations, a direct delivery into this folder messed
2794 up the contents of the maildirsize file. This was because the regex was
2795 used only to exclude .Trash (or whatever) when the size of the mailbox
2796 was calculated. There was no check that a delivery was happening into an
2797 excluded directory. This bug has been fixed by ignoring all quota
2798 processing for deliveries into excluded directories.
2800 PH/10 Added the maildirfolder_create_regex option to appendfile.
2806 PH/01 The code for finding all the local interface addresses on a FreeBSD
2807 system running IPv6 was broken. This may well have applied to all BSD
2808 systems, as well as to others that have similar system calls. The broken
2809 code found IPv4 interfaces correctly, but gave incorrect values for the
2810 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2811 that it would not match correctly against @[] and not recognize the IPv6
2814 PH/02 The ipliteral router was not recognizing addresses of the form user@
2815 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2817 PH/03 Added disable_ipv6.
2819 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2820 decoded form, because it is most often used to construct To: headers
2821 lines in autoreplies, and the decoded form may well be syntactically
2822 invalid. However, $reply_address has leading white space removed, and all
2823 newlines turned into spaces so that the autoreply transport does not
2826 PH/05 If group was specified without a user on a router, and no group or user
2827 was specified on a transport, the group from the router was ignored.
2829 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2830 for visible compile-time settings that can be used to change these
2831 numbers, for those that want even more. Backwards compatibility with old
2832 spool files has been maintained. However, going back to a previous Exim
2833 release will lost any variables that are in spool files.
2835 PH/07 Two small changes when running in the test harness: increase delay when
2836 passing a TCP/IP connection to a new process, in case the original
2837 process has to generate a bounce, and remove special handling of
2838 127.0.0.2 (sic), which is no longer necessary.
2840 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2841 be the same on different OS.
2843 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2846 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2847 whether --show-vars was specified or not
2849 JJ/02 exipick: Added support for new ACL variable spool format introduced
2852 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2853 syntactically invalid From: or Reply-to: line, and a filter used this to
2854 generate an autoreply, and therefore failed to obtain an address for the
2855 autoreply, Exim could try to deliver to a non-existent relative file
2856 name, causing unrelated and misleading errors. What now happens is that
2857 it logs this as a hard delivery error, but does not attempt to create a
2860 PH/11 The exinext utility has a -C option for testing purposes, but although
2861 the given file was scanned by exinext itself; it wasn't being passed on
2862 when Exim was called.
2864 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2865 an end-of-file indication when reading a command response.
2867 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2868 compiled. In many other places in Exim, IPv6 addresses are always
2869 recognized, so I have changed this. It also means that IPv4 domain
2870 literals of the form [IPV4:n.n.n.n] are now always recognized.
2872 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2873 used if the router is not running as root, for example, when verifying at
2874 ACL time, or when using -bh. The debugging output from this situation was
2875 non-existent - all you got was a failure to exec. I have made two
2878 (a) Failures to set uid/gid, the current directory, or a process leader
2879 in a subprocess such as that created by queryprogram now generate
2880 suitable debugging output when -d is set.
2882 (b) The queryprogram router detects when it is not running as root,
2883 outputs suitable debugging information if -d is set, and then runs
2884 the subprocess without attempting to change uid/gid.
2886 PH/15 Minor change to Makefile for building test_host (undocumented testing
2889 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2890 additional section of a DNS packet that returns MX or SRV records.
2891 Instead, it always explicitly searches for A/AAAA records. This avoids
2892 major problems that occur when a DNS server includes only records of one
2893 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2894 fixed another bug: if SRV records were looked up and the corresponding
2895 address records were *not* found in the additional section, the port
2896 values from the SRV records were lost.
2898 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2899 using the correct key (the original address) when searching the retry
2900 rules in order to find which one to use for generating the retry hint.
2902 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2903 adding the default one. Similarly, if it contains a Reply-To: header, the
2904 errors_reply_to option, if set, is not used.
2906 PH/19 When calculating a retry time, Exim used to measure the "time since
2907 failure" by looking at the "first failed" field in the retry record. Now
2908 it does not use this if it is later than than the arrival time of the
2909 message. Instead it uses the arrival time. This makes for better
2910 behaviour in cases where some deliveries succeed, thus re-setting the
2911 "first failed" field. An example is a quota failure for a huge message
2912 when small messages continue to be delivered. Without this change, the
2913 "time since failure" will always be short, possible causing more frequent
2914 delivery attempts for the huge message than are intended.
2915 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2917 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2918 $1, $2, $3) because the numerical variables can be reset during some
2919 expansion items (e.g. "match"), thereby losing the authentication data.
2921 PH/21 Make -bV show the size of off_t variables so that the test suite can
2922 decide whether to run tests for quotas > 2G.
2924 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2925 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2926 filecount value is greater than 2G or if a quota value is greater than 2G
2927 on a system where the size of off_t is not greater than 4, a panic error
2930 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2931 never match. The debug and -bh output now contains an explicit error
2932 message indicating a malformed IPv4 address or mask.
2934 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2935 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2936 PH/23 above applies.
2938 PH/25 Do not write to syslog when running in the test harness. The only
2939 occasion when this arises is a failure to open the main or panic logs
2940 (for which there is an explicit test).
2942 PH/26 Added the /no_tell option to "control=freeze".
2944 PH/27 If a host name lookup failed very early in a connection, for example, if
2945 the IP address matched host_lookup and the reverse lookup yielded a name
2946 that did not have a forward lookup, an error message of the form "no IP
2947 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2948 could be logged. Now it outputs the IP address instead of "NULL".
2950 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2951 allows the sender and the authenticated sender to be set when
2952 submitting a message from within Exim. Since child_open_exim() is
2953 documented for local_scan(), the new function should be too.
2955 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2956 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2957 results in an empty string is now treated as unset.
2959 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2961 PH/31 Added sender_verify_fail logging option.
2963 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2964 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2965 tidied the source and removed it altogether.
2967 PH/33 When a queue run was abandoned because the load average was too high, a
2968 log line was always written; now it is written only if the queue_run log
2969 selector is set. In addition, the log line for abandonment now contains
2970 information about the queue run such as the pid. This is always present
2971 in "start" and "stop" lines but was omitted from the "abandon" line.
2973 PH/34 Omit spaces between a header name and the colon in the error message that
2974 is given when verify = headers_syntax fails (if there are lots of them,
2975 the message gets confusing).
2977 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2978 names, as there are now some PTR records that contain slashes. This check
2979 is only to protect against broken name servers that fall over on strange
2980 characters, so the fact that it applies to all lookups doesn't matter.
2982 PH/36 Now that the new test suite is complete, we can remove some of the
2983 special code in Exim that was needed for the old test suite. For example,
2984 sorting DNS records because real resolvers return them in an arbitrary
2985 order. The new test suite's fake resolver always returns records in the
2988 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2989 bounces) except when queue_only is set, to avoid logging races between
2990 the different processes.
2992 PH/38 Panic-die if .include specifies a non-absolute path.
2994 PH/39 A tweak to the "H" retry rule from its user.
2996 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2997 a label. They prevented compilation on older perls.
2999 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3000 a warning to be raised on newish perls.
3002 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3003 on queue. Changes to match documented behaviour of showing count of
3004 messages matching specified criteria.
3006 PH/40 Changed the default ident timeout from 30s to 5s.
3008 PH/41 Added support for the use of login_cap features, on those BSD systems
3009 that have them, for controlling the resources used by pipe deliveries.
3011 PH/42 The content-scanning code uses fopen() to create files in which to put
3012 message data. Previously it was not paying any attention to the mode of
3013 the files. Exim runs with umask(0) because the rest of the code creates
3014 files with open(), and sets the required mode explicitly. Thus, these
3015 files were ending up world-writeable. This was not a big issue, because,
3016 being within the spool directory, they were not world-accessible. I have
3017 created a function called modefopen, which takes an additional mode
3018 argument. It sets umask(777), creates the file, chmods it to the required
3019 mode, then resets the umask. All the relevant calls to fopen() in the
3020 content scanning code have been changed to use this function.
3022 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3023 to 24 hours. This avoids potential overflow problems when processing G
3024 and H retry rules. I suspect nobody ever tinkers with this value.
3026 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3028 PH/45 When the plaintext authenticator is running as a client, the server's
3029 challenges are checked to ensure they are valid base64 strings. By
3030 default, the authentication attempt is cancelled if an invalid string is
3031 received. Setting client_ignore_invalid_base64 true ignores these errors.
3032 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3033 they are received. Thus, the responses can be made to depend on the
3034 challenges. If an invalid string is ignored, an empty string is placed in
3037 PH/46 Messages that are created by the autoreply transport now contains a
3038 References: header, in accordance with RFCs 2822 and 3834.
3040 PH/47 Added authenticated_sender_force to the smtp transport.
3042 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3044 PH/49 Installed latest patch from the Sieve maintainer.
3046 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3047 was also set, the appendfile transport was unnecessarily scanning a
3048 directory of message files (e.g. for maildir delivery) to find the count
3049 of files (along with the size), even though it did not need this
3050 information. It now does the scan only if it needs to find either the
3051 size of the count of files.
3053 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3055 PH/52 Two bugs concerned with error handling when the smtp transport is
3058 (i) Exim was not creating retry information for temporary errors given
3059 for individual recipients after the DATA command when the smtp transport
3060 was used in LMTP mode. This meant that they could be retried too
3061 frequently, and not timed out correctly.
3063 (ii) Exim was setting the flag that allows error details to be returned
3064 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3065 recipients that were returned after the DATA command.
3067 PH/53 This is related to PH/52, but is more general: for any failing address,
3068 when detailed error information was permitted to be returned to the
3069 sender, but the error was temporary, then after the final timeout, only
3070 "retry timeout exceeded" was returned. Now it returns the full error as
3071 well as "retry timeout exceeded".
3073 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3074 do this, and (what is worse) MTAs that accept it.
3076 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3077 will now be deprecated.
3079 PH/56 New os.c-cygwin from the Cygwin maintainer.
3081 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3082 formats (previously only available in exim formats via -bpr, -bpru,
3083 and -bpra. Now also available in native and exiqgrep formats)
3085 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3086 with very large, slow to parse queues
3088 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3090 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3092 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3093 responses to authentication challenges, though it was showing the
3094 challenges; (ii) I've removed the CR characters from the debug output for
3097 PH/58 Allow for the insertion of a newline as well as a space when a string
3098 is turned into more than one encoded-word during RFC 2047 encoding. The
3099 Sieve code now uses this.
3101 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3102 data_4xx, lost_connection, tls_required.
3104 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3105 message was being sent as an SMTP response.
3107 PH/61 Add -l and -k options to exicyclog.
3109 PH/62 When verifying, if an address was redirected to one new address, so that
3110 verification continued, and the new address failed or deferred after
3111 having set something in $address_data, the value of $address_data was not
3112 passed back to the ACL. This was different to the case when no
3113 redirection occurred. The value is now passed back in both cases.
3115 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3116 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3117 use login_cap.h, so on its own it isn't the distinguishing feature. The
3118 new name refers directly to the setclassresources() function.
3120 PH/65 Added configuration files for NetBSD3.
3122 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3124 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3125 is preferred over IPv4.
3127 PH/68 The bounce_return_message and bounce_return_body options were not being
3128 honoured for bounces generated during the reception of non-SMTP messages.
3129 In particular, this applied to messages rejected by the ACL. This bug has
3130 been fixed. However, if bounce_return_message is true and bounce_return_
3131 body is false, the headers that are returned for a non-SMTP message
3132 include only those that have been read before the error was detected.
3133 (In the case of an ACL rejection, they have all been read.)
3135 PH/69 The HTML version of the specification is now built in a directory called
3136 spec_html instead of spec.html, because the latter looks like a path with
3137 a MIME-type, and this confuses some software.
3139 PH/70 Catch two compiler warnings in sieve.c.
3141 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3142 function verify_get_ident() calls ip_connect() to connect a socket, but
3143 if the "connect()" function timed out, ip_connect() used to close the
3144 socket. However, verify_get_ident() also closes the socket later, and in
3145 between Exim writes to the log, which may get opened at this point. When
3146 the socket was closed in ip_connect(), the log could get the same file
3147 descriptor number as the socket. This naturally causes chaos. The fix is
3148 not to close the socket in ip_connect(); the socket should be closed by
3149 the function that creates it. There was only one place in the code where
3150 this was missing, in the iplookup router, which I don't think anybody now
3151 uses, but I've fixed it anyway.
3153 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3154 well as to direct DNS lookups. Otherwise the handling of names in host
3155 lists is inconsistent and therefore confusing.
3161 PH/01 Two changes to the default runtime configuration:
3163 (1) Move the checks for relay_from_hosts and authenticated clients from
3164 after to before the (commented out) DNS black list checks.
3166 (2) Add control=submission to the relay_from_hosts and authenticated
3167 clients checks, on the grounds that messages accepted by these
3168 statements are most likely to be submissions.
3170 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3172 (1) Generate an error if the third argument for the ${prvs expansion is
3175 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3178 (3) Reset the variables that are obtained from the first argument of
3179 ${prvscheck and used in the second argument before leaving the code,
3180 because their memory is reclaimed, so using them afterwards may do
3183 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3184 one (it's much easier than Tom thought :-).
3186 (5) Because of (4), we can now allow for the use of $prvscheck_result
3187 inside the third argument.
3189 PH/03 For some reason, the default setting of PATH when running a command from
3190 a pipe transport was just "/usr/bin". I have changed it to
3193 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3194 anything to be listed in the output from -bV.
3196 PH/05 When a filter generated an autoreply, the entire To: header line was
3197 quoted in the delivery log line, like this:
3199 => >A.N.Other <ano@some.domain> <original@ddress> ...
3201 This has been changed so that it extracts the operative address. There
3202 may be more than one such address. If so, they are comma-separated, like
3205 => >ano@some.domain,ona@other.domain <original@ddress> ...
3207 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3208 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3209 not being looked up in the rDNS to get a host name, Exim was showing the
3210 IP address twice in Received: lines, even though the IP addresses were
3211 identical. For example:
3213 Received: from [1.2.3.4] (helo=[1.2.3.4])
3215 However, if the real host name was known, it was omitting the HELO data
3216 if it matched the actual IP address. This has been tidied up so that it
3217 doesn't show the same IP address twice.
3219 PH/07 When both +timestamp and +memory debugging was on, the value given by
3220 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3221 called by the debug printing, thereby overwriting the timestamp buffer.
3222 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3224 PH/08 When the original message was included in an autoreply transport, it
3225 always said "this is a copy of the message, including all the headers",
3226 even if body_only or headers_only was set. It now gives an appropriate
3229 PH/09 Applied a patch from the Sieve maintainer which:
3231 o fixes some comments
3232 o adds the (disabled) notify extension core
3233 o adds some debug output for the result of if/elsif tests
3234 o points to the current vacation draft in the documentation
3235 and documents the missing references header update
3239 o fixes a bug in processing the envelope test (when testing
3240 multiple envelope elements, the last element determined the
3243 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3244 Electronic Mail") by including:
3246 Auto-submitted: auto-generated
3248 in the messages that it generates (bounce messages and others, such as
3249 warnings). In the case of bounce messages for non-SMTP messages, there was
3250 also a typo: it was using "Auto_submitted" (underscore instead of
3251 hyphen). Since every message generated by Exim is necessarily in response
3252 to another message, thes have all been changed to:
3254 Auto-Submitted: auto-replied
3256 in accordance with these statements in the RFC:
3258 The auto-replied keyword:
3260 - SHOULD be used on messages sent in direct response to another
3261 message by an automatic process,
3263 - MUST NOT be used on manually-generated messages,
3265 - MAY be used on Delivery Status Notifications (DSNs) and Message
3266 Disposition Notifications (MDNs),
3268 - MUST NOT be used on messages generated by automatic or periodic
3269 processes, except for messages which are automatic responses to
3272 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3273 to the default Received: header definition.
3275 PH/12 Added log selector acl_warn_skipped (default on).
3277 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3278 variables because (a) they are in the wrong storage pool and (b) even if
3279 they were copied, it wouldn't work properly because of the caching.
3281 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3282 checking when decoding. Apparently there are clients that generate
3283 overlong encoded strings. Why am I not surprised?
3285 PH/15 If the first argument of "${if match_address" was not empty, but did not
3286 contain an "@" character, Exim crashed. Now it writes a panic log message
3287 and treats the condition as false.
3289 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3291 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3292 extension "envelope-auth". The code is finished and in agreement with
3293 other implementations, but there is no documentation so far and in fact,
3294 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3295 not changing the active code.
3297 Print executed "if" and "elsif" statements when debugging is used. This
3298 helps a great deal to understand what a filter does.
3300 Document more things not specified clearly in RFC3028. I had all this
3301 sorted out, when out of a sudden new issues came to my mind. Oops."
3303 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3306 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3307 canonical form (as documented). However, after a host name lookup from
3308 the IP address, check_host() was doing a simple string comparison with
3309 addresses acquired from the DNS when checking that the found name did
3310 have the original IP as one of its addresses. Since any found IPv6
3311 addresses are likely to be in abbreviated form, the comparison could
3312 fail. Luckily, there already exists a function for doing the comparison
3313 by converting both addresses to binary, so now that is used instead of
3314 the text comparison.
3316 PH/20 There was another similar case to PH/19, when a complete host name was
3317 given in a host list; looking up its IP address could give an abbreviated
3318 form, whereas the current host's name might or might not be abbreviated.
3319 The same fix has been applied.
3325 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3326 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3329 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3330 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3332 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3334 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3335 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3336 Also, for "Auto-Submitted", treat anything other than "no" as
3337 non-personal, in accordance with RFC 3834. (Previously it treated
3338 anything starting "auto-" as non-personal.)
3340 TF/01 The control=submission/name=... option had a problem with syntax
3341 errors if the name included a slash character. The /name= option
3342 now slurps the rest of the string, so it can include any characters
3343 but it must come last in the list of options (after /sender_retain
3346 PH/05 Some modifications to the interface to the fake nameserver for the new
3354 TK/01 Added the "success_on_redirect" address verification option. See
3355 NewStuff for rationale and an example.
3357 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3359 PH/02 Patch to exigrep to allow it to work on syslog lines.
3361 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3362 fread() to skip over the body file's header line, because in Cygwin the
3363 header line is locked and is inaccessible.
3365 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3366 co-exist for some time) to make it clear that it is the Exim ID that is
3367 referenced, not the Message-ID: header line.
3369 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3370 string_format() function, because snprintf() does not exist on all
3373 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3374 ${stat: expansion item.
3376 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3377 protocol synchronization error", to keep the pedants happy.
3379 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3380 well as for IRIX systems, when gcc is being used. See the host.c source
3383 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3385 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3388 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3389 transport and to the smtp transport in LMTP mode.
3391 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3393 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3394 run a filter in a subprocess. This could lead to confusion in subsequent
3395 lookups in the parent process. There should also be a search_tidyup() at
3396 the end of the subprocess.
3398 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3399 only if the host matched helo_try_verify_hosts, which caused the
3400 verification to occur when the EHLO/HELO command was issued. The ACL just
3401 tested the remembered result. Now, if a previous verification attempt has
3402 not happened, "verify = helo" does it there and then.
3404 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3406 TK/03 Fix log output including CR from clamd.
3408 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3409 exist provoked a memory error which could cause a segfault.
3411 PH/15 Installed PCRE 6.2
3413 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3415 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3416 of the problem. Specifically, suggested +O2 rather than +O1 for the
3419 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3421 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3422 record, the port was not correctly logged when the outgoing_port log
3423 selector was set (it logged the transort's default port).
3425 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3426 fallback_hosts, and "hosts" in the smtp transport.
3428 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3429 host errors such as "Connection refused".
3431 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3432 authentication with radiusclient 0.4.9:
3434 - Error returned from rc_read_config was caught wrongly
3435 - Username/password not passed on to radius server due to wrong length.
3437 The presumption is that some radiusclient API changes for 4.51/PH/17
3438 were not taken care of correctly. The code is still untested by me (my
3439 Linux distribution still has 0.3.2 of radiusclient), but it was
3440 contributed by a Radius user.
3442 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3443 expanding the "port" option of the smtp transport.
3445 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3446 while reading a MIME header. Thanks to Tom Hughes for a patch.
3448 PH/24 Include config.h inside local_scan.h so that configuration settings are
3451 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3452 that in an ACL for RCPT (for example), you can examine exactly what was
3455 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3456 commands, but it was not correctly comparing the address with the actual
3457 client host address. Thus, it would show the EHLO address in Received:
3458 header lines when this was not necessary.
3460 PH/27 Added the % operator to ${eval:}.
3462 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3463 it should be ignoring failures (because with -C, for example, it has lost
3464 privilege). It wasn't ignoring creation failures other than "already
3467 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3470 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3471 because an input line was too long, either on its own, or by virtue of
3472 too many continuations, the temporary file was not being removed, and the
3473 return code was incorrect.
3475 PH/31 Missing "BOOL" in function definition in filtertest.c.
3477 PH/32 Applied Sieve patches from the maintainer.
3479 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3481 PH/33 Added "verify = not_blind".
3483 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3484 Local/Makefile (with some defaults set). These are used in built scripts
3485 such as exicyclog, but they have never been used in the exim_install
3486 script (though there are many overriding facilities there). I have
3487 arranged that the exim_install script now takes note of these two
3490 PH/35 Installed configuration files for Dragonfly.
3492 PH/36 When a locally submitted message by a trusted user did not contain a
3493 From: header, and the sender address was obtained from -f or from an SMTP
3494 MAIL command, and the trusted user did not use -F to supply a sender
3495 name, $originator_name was incorrectly used when constructing a From:
3496 header. Furthermore, $originator_name was used for submission mode
3497 messages from external hosts without From: headers in a similar way,
3498 which is clearly wrong.
3500 PH/37 Added control=suppress_local_fixups.
3502 PH/38 When log_selector = +received_sender was set, and the addition of the
3503 sender made the log line's construction buffer exactly full, or one byte
3504 less than full, an overflow happened when the terminating "\n" was
3507 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3508 when the result of a list match is failure because a DNS lookup failed.
3510 PH/40 RM_COMMAND is now used in the building process.
3512 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3513 the "build-* directories that it finds.
3515 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3516 address in a domain literal was a prefix of an interface address.
3518 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3519 when verifying a sender address, unless rewrite_headers is false.
3521 PH/44 Wrote a long comment about why errors_to addresses are verified as
3522 recipients, not senders.
3524 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3525 the ratelimit ACL was added.
3527 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3529 PH/46 Added extra information about PostgreSQL errors to the error string.
3531 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3532 avoiding the need to install special zones in a real server. This is
3533 backwards compatible; if it can't find the fake resolver, it drops back.
3534 Thus, both old and new test suites can be run.
3536 TF/02 Added util/ratelimit.pl
3538 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3539 clock is set back in time.
3541 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3542 Candler <B.Candler@pobox.com>.
3544 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3545 OK for addresses that are the result of redirections.
3547 PH/48 A number of further additions for the benefit of the new test suite,
3548 including a fake gethostbyname() that interfaces to the fake DNS resolver
3551 TF/06 The fix for widen_domains has also been applied to qualify_single and
3552 search_parents which are the other dnslookup options that can cause
3555 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3558 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3560 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3561 service" if it encountered an MX record with an empty target hostname.
3562 The message is now "an MX or SRV record indicated no SMTP service".
3564 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3565 if the DNS of the sending site is misconfigured. This is quite a
3566 common situation. This change restores the behaviour of treating a
3567 helo verification defer as a failure.
3569 PH/51 If self=fail was set on a router, the bounce message did not include the
3570 actual error message.
3576 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3578 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3579 command itself ended in error, the underlying message about the transport
3580 filter timeout was being overwritten with the pipe command error. Now the
3581 underlying error message should be appended to the second error message.
3583 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3585 PH/02 Reduce the amount of output that "make" produces by default. Full output
3586 can still be requested.
3588 PH/03 The warning log line about a condition test deferring for a "warn" verb
3589 was being output only once per connection, rather than after each
3590 occurrence (because it was using the same function as for successful
3591 "warn" verbs). This seems wrong, so I have changed it.
3593 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3594 it should not have, which might have caused a crash in the right
3595 circumstances, but probably never did.
3597 PH/04 Installed a modified version of Tony Finch's patch to make submission
3598 mode fix the return path as well as the Sender: header line, and to
3599 add a /name= option so that you can make the user's friendly name appear
3602 TF/03 Added the control = fakedefer ACL modifier.
3604 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3605 Mark Lowes for thorough testing.
3607 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3609 TK/03 Merged latest SRS patch from Miles Wilton.
3611 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3612 with the definition in sysexits.h (which is #included earlier).
3613 Fortunately, Exim does not actually use EX_OK. The code used to try to
3614 preserve the sysexits.h value, by assuming that macro definitions were
3615 scanned for macro replacements. I have been disabused of this notion,
3616 so now the code just undefines EX_OK before #including unistd.h.
3618 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3619 in the smtp transport. When a block could not be written in a single
3620 write() function, the timeout was being re-applied to each part-write.
3621 This seems wrong - if the receiver was accepting one byte at a time it
3622 would take for ever. The timeout is now adjusted when this happens. It
3623 doesn't have to be particularly precise.
3625 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3626 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3628 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3629 without a domain if the check to <postmaster@domain> fails.
3631 SC/01 Eximstats: added -xls and the ability to specify output files
3632 (patch written by Frank Heydlauf).
3634 SC/02 Eximstats: use FileHandles for outputting results.
3636 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3638 SC/04 Eximstats: fixed display of large numbers with -nvr option
3640 SC/05 Eximstats: fixed merging of reports with empty tables.
3642 SC/06 Eximstats: added the -include_original_destination flag
3644 SC/07 Eximstats: removed tabs and trailing whitespace.
3646 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3648 TK/06 MBOX spool code: Add real "From " MBOX separator line
3649 so the .eml file is really in mbox format (even though
3650 most programs do not really care). Patch from Alex Miller.
3652 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3653 The latter is generated from $received_to and is only set if the
3654 message has one envelope recipient. SA can use these headers,
3655 obviously out-of-the-box. Patch from Alex Miller.
3657 PH/08 The ${def test on a variable was returning false if the variable's
3658 value was "0", contrary to what the specification has always said!
3659 The result should be true unless the variable is empty.
3661 PH/09 The syntax error of a character other than { following "${if
3662 def:variable_name" (after optional whitespace) was not being diagnosed.
3663 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3664 accidental colon was present, for example, could give incorrect results.
3666 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3667 result is used (not including appendfile, where other changes are about
3670 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3671 This involved changing a lot of size variables from int to off_t. It
3672 should work with maildirs and everything.
3674 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3675 spamd dying while we are connected to it.
3677 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3680 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3681 function for BDB 4.3.
3683 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3685 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3686 the sources for PCRE have been re-arranged and more files are now
3689 PH/15 The code I had for printing potentially long long variables in PH/11
3690 above was not the best (it lost precision). The length of off_t variables
3691 is now inspected at build time, and an appropriate printing format (%ld
3692 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3693 to be "long long int" or "long int". This is needed for the internal
3694 formatting function string_vformat().
3696 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3697 the configuration file to be ":syslog", then the script "guesses" where
3698 the logs files are, rather than using the compiled in default. In our
3699 case the guess is not the same as the compiled default, so the script
3700 suddenly stopped working when I started to use syslog. The patch checks
3701 to see if log_file_path is "". If so, it attempts to read it from exim
3702 with no configuration file to get the compiled in version, before it
3703 falls back to the previous guessing code."
3705 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3706 implementing BATV in an Exim configuration. See NewStuff for the gory
3709 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3710 Makefile that are specific to HP-UX.
3712 PH/18 If the "use_postmaster" option was set for a recipient callout together
3713 with the "random" option, the postmaster address was used as the MAIL
3714 FROM address for the random test, but not for the subsequent recipient
3715 test. It is now used for both.
3717 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3718 patch removes a few documentation additions to RFC 3028, because the
3719 latest draft now contains them. It adds the new en;ascii-case comparator
3720 and a new error check for 8bit text in MIME parts. Comparator and
3721 require names are now matched exactly. I enabled the subaddress
3722 extension, but it is not well tested yet (read: it works for me)."
3724 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3725 rework some of the code of TK/09 above to avoid the hardwired use of
3726 "%lld" and "long long". Replaced the call to snprintf() with a call to
3729 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3730 records point to non-existent hosts", "retry timeout exceeded", and
3731 "retry time not reached for any host after a long failure period".
3733 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3734 experimental DomainKeys support:
3736 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3737 (2) On an error such as an illegally used "control", the wrong name for
3738 the control was given.
3740 These problems did NOT occur unless DomainKeys support was compiled.
3742 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3744 PH/24 Added ${if match_ip condition.
3746 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3747 databases so that it will be absolutely obvious if a crash occurs in the
3748 DB library. This is a regular occurrence (often caused by mis-matched
3751 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3752 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3753 picked up on a user's system that detects such things. There doesn't seem
3754 to be a gcc warning option for this - only an attribute that has to be
3755 put on the function's prototype. It seems that in Fedora Core 4 they have
3756 set this on a number of new functions. No doubt there will be more in due
3759 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3760 specify a transport. However, if an address that was verified by such a
3761 router was the subject of a callout, Exim crashed because it tried to
3762 read the rcpt_include_affixes from the non-existent transport. Now it
3763 just assumes that the setting of that option is false. This bug was
3764 introduced by 4.51/PH/31.
3766 PH/28 Changed -d+all to exclude +memory, because that information is very
3767 rarely of interest, but it makes the output a lot bigger. People tend to
3768 do -d+all out of habit.
3770 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3771 code in os-type was giving problems when libc.so lives in lib64, like on
3774 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3775 aren't the modern standard, and it seems that some systems' include files
3776 don't always have them. Exim was already checking for some of the newer
3777 ones like T_AAAA, and defining it itself. I've added checks for all the
3778 record types that Exim uses.
3780 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3781 not automatically generating a new one, as it is supposed to. This
3782 prevented TLS from working. If the file did exist, but contained invalid
3783 data, a new version was generated, as expected. It was only the case of a
3784 non-existent file that was broken.
3786 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3787 with a change in libdomainkeys > 0.64.
3789 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3790 from DNS. If the selector record carries the flag, it now has
3791 precedence over the domain-wide flag.
3793 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3795 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3796 the use of a port name that isn't defined in /etc/services) occurred, the
3797 message was deferred as in a normal delivery, and thus remained on the
3798 spool, instead of being failed because of the mua_wrapper setting. This
3799 is now fixed, and I tidied up some of the mua_wrapper messages at the
3802 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3803 the messages in a hash of arrays rather than using individual hashes.
3804 This is a bit cleaner and results in dramatic memory savings, albeit
3805 at a slight CPU cost.
3807 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3808 as requested by Marc Sherman.
3810 SC/10 Eximstats: added histograms for user specified patterns as requested
3813 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3815 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3816 fopen() in the content-scanning modules that did not already have it.
3822 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3823 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3825 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3827 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3829 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3830 to test Sieve filters that use "vacation".
3832 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3833 that changes the way the GnuTLS parameters are stored in the cache file.
3834 The new format can be generated externally. For backward compatibility,
3835 if the data in the cache doesn't make sense, Exim assumes it has read an
3836 old-format file, and it generates new data and writes a new file. This
3837 means that you can't go back to an older release without removing the
3840 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3841 work if there are any delivery delays because "one_time" forces the
3842 parent to be marked "delivered", so its unseen clone is never tried
3843 again. For this reason, Exim now forbids the simultaneous setting of
3846 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3847 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3848 entry if you want to know the details. The fix, however, neglected to
3849 consider the case when local delivery batching is involved. The test for
3850 "previously delivered" was not happening when checking to see if an
3851 address could be batched with a previous (undelivered) one; under
3852 certain circumstances this could lead to multiple deliveries to the same
3855 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3856 in its include files, and this causes problems building Exim.
3858 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3859 header_syntax) but Exim was just ignoring anything given after a slash.
3860 In particular, this caused confusion with an attempt to use "verify =
3861 reverse_host_lookup/defer_ok". An error is now given when options are
3862 supplied for verify items that do not have them. (Maybe reverse_host_
3863 lookup should have a defer_ok option, but that's a different point.)
3865 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3866 defined by RFC 821) to 2048, because there were problems with some AUTH
3867 commands, and RFC 1869 says the size should be increased for extended
3868 SMTP commands that take arguments.
3870 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3873 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3874 "unknown" error; now it says that the functionality isn't in the binary.
3876 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3877 an address' error message when a string expansion fails (syntax or
3878 whatever). Otherwise the password may appear in the log. Following change
3879 PH/42 below, there is no longer a chance of it appearing in a bounce
3882 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3884 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3885 of its addresses was ever tried. (Bugzilla bug #2.)
3887 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3888 the result incorrectly in the debug output. (It correctly added a newline
3889 to what was transported.)
3891 TF/01 Added $received_time.
3893 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3894 commented out examples of how to interface to a virus scanner and to
3895 SpamAssassin. Also added commented examples of av_scanner and
3896 spamd_address settings.
3898 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3899 and controls are allowed in which ACLs. There were a couple of minor
3900 errors. Some of the entries in the conditions table (which is a table of
3901 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3902 negation of where the condition IS allowed.
3904 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3906 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3907 header file does not have a version number, so I've had to invent a new
3908 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3909 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3910 radiusclient), but it was contributed by a Radius user.
3912 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3913 files or directories, for OpenSSL.
3915 PH/19 When an Exim process that is running as root has to create an Exim log
3916 file, it does so in a subprocess that runs as exim:exim so as to get the
3917 ownership right at creation (otherwise, other Exim processes might see
3918 the file with the wrong ownership). There was no test for failure of this
3919 fork() call, which would lead to the process getting stuck as it waited
3920 for a non-existent subprocess. Forks do occasionally fail when resources
3921 run out. I reviewed all the other calls to fork(); they all seem to check
3924 PH/20 When checking for unexpected SMTP input at connect time (before writing
3925 the banner), Exim was not dealing correctly with a non-positive return
3926 from the read() function. If the client had disconnected by this time,
3927 the result was a log entry for a synchronization error with an empty
3928 string after "input=" when read() returned zero. If read() returned -1
3929 (an event I could not check), uninitialized data bytes were printed.
3930 There were reports of junk text (parts of files, etc) appearing after
3933 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3935 PH/22 Added support for macro redefinition, and (re)definition in between
3936 driver and ACL definitions.
3938 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3939 forgetting to use the resulting value; it was using the unexpanded value.
3941 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3942 hadn't been configured. The fix is from Juergen Kreileder, who
3943 understands it better than I do:
3945 "Here's what I see happening with three configured cyrus_sasl
3946 authenticators configured (plain, login, cram-md5):
3948 On startup auth_cyrus_sasl_init() gets called for each of these.
3949 This means three calls to sasl_listmech() without a specified mech_list.
3950 => SASL tests which mechs of all available mechs actually work
3951 => three warnings about OTP not working
3952 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3954 With the patch, sasl_listmech() also gets called three times. But now
3955 SASL's mech_list option is set to the server_mech specified in the the
3956 authenticator. Or in other words, the answer from sasl_listmech()
3957 gets limited to just the mech you're testing for (which is different
3959 => the return list contains just 'plain' or 'login', 'cram-md5' or
3960 nothing depending on the value of ob->server_mech.
3962 I've just tested the patch: Authentication still works fine,
3963 unavailable mechs specified in the exim configuration are still
3964 caught, and the auth.log warnings about OTP are gone."
3966 PH/25 When debugging is enabled, the contents of the command line are added
3967 to the debugging output, even when log_selector=+arguments is not
3970 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3971 answer is "GNU", and only if the return is "GNU/something" is the answer
3974 PH/27 $acl_verify_message is now set immediately after the failure of a
3975 verification in an ACL, and so is available in subsequent modifiers. In
3976 particular, the message can be preserved by coding like this:
3978 warn !verify = sender
3979 set acl_m0 = $acl_verify_message
3981 Previously, $acl_verify_message was set only while expanding "message"
3982 and "log_message" when a very denied access.
3984 PH/28 Modified OS/os.c-Linux with
3986 -#ifndef OS_LOAD_AVERAGE
3987 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3989 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3990 nomenclature these days.)
3992 PH/29 Installed patch from the Sieve maintainer that adds the options
3993 sieve_useraddress and sieve_subaddress to the redirect router.
3995 PH/30 In these circumstances:
3996 . Two addresses routed to the same list of hosts;
3997 . First host does not offer TLS;
3998 . First host accepts first address;
3999 . First host gives temporary error to second address;
4000 . Second host offers TLS and a TLS session is established;
4001 . Second host accepts second address.
4002 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4003 and peerdn, if requested) that were in fact used only for the second
4006 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4007 attention to any local part prefix or suffix that was matched by the
4008 router that accepted the address. It now behaves in the same way as it
4009 does for delivery: the affixes are removed from the local part unless
4010 rcpt_include_affixes is set on the transport.
4012 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4013 timeout during the DATA phase of an incoming message.
4015 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4016 applied a patch sanctioned by the Sieve maintainer.
4018 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4019 the uid or gid is negative. A case of a negative gid caused this to be
4020 noticed. The fix allows for either to be negative.
4022 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4023 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4026 PH/36 The change PH/12 above was broken. Fixed it.
4028 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4029 the grounds that routing the same address twice would always produce the
4030 same answer. This might have been true once, but it is certainly no
4031 longer true now. Routing a child address may depend on the previous
4032 routing that produced that child. Some complicated redirection strategies
4033 went wrong when messages had multiple recipients, and made Exim's
4034 behaviour dependent on the order in which the addresses were given.
4036 I have moved the duplicate checking until after the routing is complete.
4037 Exim scans the addresses that are assigned to local and remote
4038 transports, and removes any duplicates. This means that more work will be
4039 done, as duplicates will always all be routed, but duplicates are
4040 presumably rare, so I don't expect this is of any significance.
4042 For deliveries to pipes, files, and autoreplies, the duplicate checking
4043 still happens during the routing process, since they are not going to be
4046 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4047 It corrects a timeout issue with spamd. This is Ian's comment: "The
4048 background is that sometimes spamd either never reads data from a
4049 connection it has accepted, or it never writes response data. The exiscan
4050 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4051 blindly assumes that writes won't block so it may never time out."
4053 PH/39 Allow G after quota size as well as K and M.
4055 PH/40 The value set for $authenticated_id in an authenticator may not contain
4056 binary zeroes or newlines because the value is written to log lines and
4057 to spool files. There was no check on this. Now the value is run through
4058 the string_printing() function so that such characters are converted to
4059 printable escape sequences.
4061 PH/41 $message_linecount is a new variable that contains the total number of
4062 lines in the message. Compare $body_linecount, which is the count for the
4065 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4066 bounce and delay warning messages, except in certain special cases, which
4069 (a) An SMTP error message from a remote host;
4070 (b) A message specified in a :fail: redirection;
4071 (c) A message specified in a "fail" command in a system filter;
4072 (d) A message specified in a FAIL return from the queryprogram router;
4073 (e) A message specified by the cannot_route_message router option.
4075 In these cases only, Exim does include the error details in bounce and
4076 warning messages. There are also a few cases where bland messages such
4077 as "unrouteable address" or "local delivery error" are given.
4079 PH/43 $value is now also set for the "else" part of a ${run expansion.
4081 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4082 being worked on, but at least Exim now implements the latest version to
4085 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4086 process to complete was treated as a delivery failure, a timeout while
4087 writing the message to the pipe was logged, but erroneously treated as a
4088 successful delivery. Such timeouts include transport filter timeouts. For
4089 consistency with the overall process timeout, these timeouts are now
4090 treated as errors, giving rise to delivery failures by default. However,
4091 there is now a new Boolean option for the pipe transport called
4092 timeout_defer, which, if set TRUE, converts the failures into defers for
4093 both kinds of timeout. A transport filter timeout is now identified in
4096 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4097 systems where "make" and "gmake" are different, calling "gmake" at top
4098 level broke things. I've arranged for the value of $(MAKE) to be passed
4099 from the Makefile to this script so that it can call the same version of
4103 A note about Exim versions 4.44 and 4.50
4104 ----------------------------------------
4106 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4107 changes of various kinds. As a consequence, a big documentation update was
4108 needed. This delayed the release for rather longer than seemed good, especially
4109 in the light of a couple of (minor) security issues. Therefore, the changes
4110 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4111 release. So 4.44 and 4.50 are in effect two different branches that both start
4114 I have left the 4.50 change log unchanged; it contains all the changes since
4115 4.43. The change log for 4.44 is below; many of its items are identical to
4116 those for 4.50. This seems to be the most sensible way to preserve the
4117 historical information.
4123 1. Minor wording change to the doc/README.SIEVE file.
4125 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4126 computation of the current number of files was incorrect.
4128 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4129 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4132 4. Give more explanation in the error message when the command for a transport
4133 filter fails to execute.
4135 5. There are several places where Exim runs a non-Exim command in a
4136 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4137 was being done only for the command run by the queryprogram router. It is
4138 now done for all such subprocesses. The other cases are: ${run, transport
4139 filters, and the commands run by the lmtp and pipe transports.
4141 6. Added CONFIGURE_GROUP build-time option.
4143 7. Some older OS have a limit of 256 on the maximum number of file
4144 descriptors. Exim was using setrlimit() to set 1000 as a large value
4145 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4146 systems. I've change it so that if it can't get 1000, it tries for 256.
4148 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4149 was an oversight, and furthermore, ever since the addition of extra
4150 controls (e.g. 4.43/32), the checks on when to allow different forms of
4151 "control" were broken. There should now be diagnostics for all cases when a
4152 control that does not make sense is encountered.
4154 9. Added the /retain_sender option to "control=submission".
4156 10. $recipients is now available in the predata ACL (oversight).
4158 11. Tidy the search cache before the fork to do a delivery from a message
4159 received from the command line. Otherwise the child will trigger a lookup
4160 failure and thereby defer the delivery if it tries to use (for example) a
4161 cached ldap connection that the parent has called unbind on.
4163 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4164 of $address_data from the recipient verification was clobbered by the
4165 sender verification.
4167 13. The value of address_data from a sender verification is now available in
4168 $sender_address_data in subsequent conditions in the ACL statement.
4170 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4172 15. Added a new option "connect=<time>" to callout options, to set a different
4175 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4176 was its contents. (It was OK if the option was not defined at all.)
4178 17. A "Completed" log line is now written for messages that are removed from
4179 the spool by the -Mrm option.
4181 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4182 information about exactly what failed.
4184 19. Added -dd to debug only the daemon process.
4186 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4187 handles timeouts, both on the server side and network timeouts. Renamed the
4188 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4190 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4191 It is now set to "smtps".
4193 22. $host_address is now set to the target address during the checking of
4194 ignore_target_hosts.
4196 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4197 being passed; this would have caused $sender_host_name to have been used if
4198 matching the list had actually called for a host name (not very likely,
4199 since this list is usually IP addresses). A host name is now passed as
4202 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4203 code that specifies a non-restarting handler (typically sigaction() in
4204 modern systems) in an attempt to fix a rare and obscure crash bug.
4206 25. Narrowed the window for a race in the daemon that could cause it to ignore
4207 SIGCHLD signals. This is not a major problem, because they are used only to
4208 wake it up if nothing else does.
4210 26. A malformed maildirsize file could cause Exim to calculate negative values
4211 for the mailbox size or file count. Odd effects could occur as a result.
4212 The maildirsize information is now recalculated if the size or filecount
4215 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4216 support for a long time. Removed HAVE_SYS_VFS_H.
4218 28. Installed the latest version of exipick from John Jetmore.
4220 29. In an address list, if the pattern was not a regular expression, an empty
4221 subject address (from a bounce message) matched only if the pattern was an
4222 empty string. Non-empty patterns were not even tested. This was the wrong
4223 because it is perfectly reasonable to use an empty address as part of a
4224 database query. An empty address is now tested by patterns that are
4225 lookups. However, all the other forms of pattern expect the subject to
4226 contain a local part and a domain, and therefore, for them, an empty
4227 address still always fails if the pattern is not itself empty.
4229 30. Exim went into a mad DNS loop when attempting to do a callout where the
4230 host was specified on an smtp transport, and looking it up yielded more
4231 than one IP address.
4233 31. Re-factored the code for checking spool and log partition space into a
4234 function that finds that data and another that does the check. The former
4235 is then used to implement four new variables: $spool_space, $log_space,
4236 $spool_inodes, and $log_inodes.
4238 32. The RFC2047 encoding function was originally intended for short strings
4239 such as real names; it was not keeping to the 75-character limit for
4240 encoded words that the RFC imposes. It now respects the limit, and
4241 generates multiple encoded words if necessary. To be on the safe side, I
4242 have increased the buffer size for the ${rfc2047: expansion operator from
4245 33. It is now permitted to omit both strings after an "if" condition; if the
4246 condition is true, the result is "true". As before, when the second string
4247 is omitted, a false condition yields an empty string. This makes it less
4248 cumbersome to write custom ACL and router conditions.
4250 34. Failure to deliver a bounce message always caused it to be frozen, even if
4251 there was an errors_to setting on the router. The errors_to setting is now
4254 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4255 canonical form (fully expanded) before being placed in
4256 $sender_host_address.
4258 36. The table in the code that translates DNS record types into text (T_A to
4259 "A" for instance) was missing entries for NS and CNAME. It is just possible
4260 that this could have caused confusion if both these types were looked up
4261 for the same domain, because the text type is used as part of Exim's
4262 per-process caching. But the chance of anyone hitting this buglet seems
4265 37. The dnsdb lookup has been extended in a number of ways.
4267 (1) There is a new type, "zns", which walks up the domain tree until it
4268 finds some nameserver records. It should be used with care.
4270 (2) There is a new type, "mxh", which is like "mx" except that it returns
4271 just the host names, not the priorities.
4273 (3) It is now possible to give a list of domains (or IP addresses) to be
4274 looked up. The behaviour when one of the lookups defers can be
4275 controlled by a keyword.
4277 (4) It is now possible to specify the separator character for use when
4278 multiple records are returned.
4280 38. The dnslists ACL condition has been extended: it is now possible to supply
4281 a list of IP addresses and/or domains to be looked up in a particular DNS
4284 39. Added log_selector=+queue_time_overall.
4286 40. When running the queue in the test harness, wait just a tad after forking a
4287 delivery process, to get repeatability of debugging output.
4289 41. Include certificate and key file names in error message when GnuTLS fails
4290 to set them up, because the GnuTLS error message doesn't include the name
4291 of the failing file when there is a problem reading it.
4293 42. Allow both -bf and -bF in the same test run.
4295 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4297 44. The "Exiscan patch" is now merged into the mainline Exim source.
4299 45. Sometimes the final signoff response after QUIT could fail to get
4300 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4301 < 0 before doing a fflush(). This bug looks as though it goes back to the
4302 introduction of TLS in release 3.20, but "sometimes" must have been rare
4303 because the tests only now provoked it.
4305 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4306 (this can affect the format of dates).
4308 47. exim_tidydb, when checking for the continued existence of a message for
4309 which it has found a message-specific retry record, was not finding
4310 messages that were in split spool directories. Consequently, it was
4311 deleting retry records that should have stayed in existence.
4313 48. Steve fixed some bugs in eximstats.
4315 49. The SPA authentication driver was not abandoning authentication and moving
4316 on to the next authenticator when an expansion was forced to fail,
4317 contradicting the general specification for all authenticators. Instead it
4318 was generating a temporary error. It now behaves as specified.
4320 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4321 (the order specifies the preference for clients). The order is now AES256,
4322 AES128, 3DES, ARCFOUR128.
4324 51. Small patch to Sieve code - explicitly set From: when generating an
4327 52. Exim crashed if a remote delivery caused a very long error message to be
4328 recorded - for instance if somebody sent an entire SpamAssassin report back
4329 as a large number of 550 error lines. This bug was coincidentally fixed by
4330 increasing the size of one of Exim's internal buffers (big_buffer) that
4331 happened as part of the Exiscan merge. However, to be on the safe side, I
4332 have made the code more robust (and fixed the comments that describe what
4335 53. Now that there can be additional text after "Completed" in log lines (if
4336 the queue_time_overall log selector is set), a one-byte patch to exigrep
4337 was needed to allow it to recognize "Completed" as not the last thing in
4340 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4341 patch that reportedly fixes this has been added. I am not expert enough to
4342 create a test for it. This is what the patch creator wrote:
4344 "I found a little strange behaviour of ldap code when working with
4345 Windows 2003 AD Domain, where users was placed in more than one
4346 Organization Units. When I tried to give exim partial DN, the exit code
4347 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4348 But simultaneously result of request was absolutely normal ldap result,
4349 so I produce this patch..."
4351 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4352 REFERENCE, so I have modified the code to exclude the patch when that macro
4355 55. Some experimental protocols are using DNS PTR records for new purposes. The
4356 keys for these records are domain names, not reversed IP addresses. The
4357 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4358 leaves it alone. Component reversal etc. now happens only for IP addresses.
4361 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4363 57. Double the size of the debug message buffer (to 2048) so that more of very
4364 long debug lines gets shown.
4366 58. The exicyclog utility now does better if the number of log files to keep
4367 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4369 59. Two changes related to the smtp_active_hostname option:
4371 (1) $smtp_active_hostname is now available as a variable.
4372 (2) The default for smtp_banner uses $smtp_active_hostname instead
4373 of $primary_hostname.
4375 60. The host_aton() function is supposed to be passed a string that is known
4376 to be a valid IP address. However, in the case of IPv6 addresses, it was
4377 not checking this. This is a hostage to fortune. Exim now panics and dies
4378 if the condition is not met. A case was found where this could be provoked
4379 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4380 components; fortuitously, this particular loophole had already been fixed
4381 by change 4.50/55 above.
4383 If there are any other similar loopholes, the new check in host_aton()
4384 itself should stop them being exploited. The report I received stated that
4385 data on the command line could provoke the exploit when Exim was running as
4386 exim, but did not say which command line option was involved. All I could
4387 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4388 running as the user.
4391 61. There was a buffer overflow vulnerability in the SPA authentication code
4392 (which came originally from the Samba project). I have added a test to the
4393 spa_base64_to_bits() function which I hope fixes it.
4396 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4397 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4399 63. The daemon start-up calls getloadavg() while still root for those OS that
4400 need the first call to be done as root, but it missed one case: when
4401 deliver_queue_load_max is set with deliver_drop_privilege. This is
4402 necessary for the benefit of the queue runner, because there is no re-exec
4403 when deliver_drop_privilege is set.
4405 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4406 This has been fixed.
4408 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4409 was in use, was not putting the data itself into the right store pool;
4410 consequently, it could be overwritten for a subsequent message in the same
4411 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4414 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4416 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4417 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4418 the function were treating the return as a boolean value, which happened to
4419 work because 0=false and not-0=true, but is not correct code.
4421 68. The host_aton() function was not handling scoped IPv6 addresses (those
4422 with, for example, "%eth0" on the end) correctly.
4424 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4425 negated items (that is, ~something) in unsigned ints. Some compilers
4426 apparently mutter when there is no cast.
4428 70. If an address verification called from an ACL failed, and did not produce a
4429 user-specific message (i.e. there was only a "system" message), nothing was
4430 put in $acl_verify_message. In this situation, it now puts the system
4433 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4434 session; change 4.31/43 added the unwanted input to the log line - except
4435 that it did not do this in the start of session case. It now does.
4437 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4438 This is wrong and can cause the other end to generate a synchronization
4439 error if it is another Exim or anything else that does the synchronization
4440 check. A QUIT command is no longer sent after a timeout.
4442 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4443 during host lookups.
4445 74. The defer_ok option of callout verification was not working if it was used
4446 when verifying addresses in header lines, that is, for this case:
4448 verify = header_sender/callout=defer_ok
4450 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4451 those file descriptors could be used for SMTP connections. If anything
4452 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4453 could be sent to the SMTP client, causing chaos. The daemon now opens
4454 stdin, stdout, and stderr to /dev/null when it puts itself into the
4457 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4458 log by default. The user can override this with suitable Perl magic.
4460 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4461 the log message when discard triggers, was not working for the DATA ACL or
4462 for the non-SMTP ACL.
4464 78. Error message wording change in sieve.c.
4466 79. If smtp_accept_max_per_host was set, the number of connections could be
4467 restricted to fewer than expected, because the daemon was trying to set up
4468 a new connection before checking whether the processes handling previous
4469 connections had finished. The check for completed processes is now done
4470 earlier. On busy systems, this bug wouldn't be noticed because something
4471 else would have woken the daemon, and it would have reaped the completed
4474 80. If a message was submitted locally by a user whose login name contained one
4475 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4476 It caused a spool format error. I have fixed the spool reading code. A
4477 related problem was that the "from" clause in the Received: line became
4478 illegal because of the space(s). It is now covered by ${quote_local_part.
4480 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4483 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4485 83. Patch from Sieve maintainer to fix unterminated string problem in
4486 "vacation" handling.
4488 84. Some minor changes to the Linux configuration files to help with other
4489 OS variants using glibc.
4491 85. One more patch for Sieve to update vacation handling to latest spec.
4494 ----------------------------------------------------
4495 See the note above about the 4.44 and 4.50 releases.
4496 ----------------------------------------------------
4502 1. Change 4.43/35 introduced a bug that caused file counts to be
4503 incorrectly computed when quota_filecount was set in an appendfile
4506 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4507 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4510 3. Give more explanation in the error message when the command for a transport
4511 filter fails to execute.
4513 4. There are several places where Exim runs a non-Exim command in a
4514 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4515 was being done only for the command run by the queryprogram router. It is
4516 now done for all such subprocesses. The other cases are: ${run, transport
4517 filters, and the commands run by the lmtp and pipe transports.
4519 5. Some older OS have a limit of 256 on the maximum number of file
4520 descriptors. Exim was using setrlimit() to set 1000 as a large value
4521 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4522 systems. I've change it so that if it can't get 1000, it tries for 256.
4524 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4525 was an oversight, and furthermore, ever since the addition of extra
4526 controls (e.g. 4.43/32), the checks on when to allow different forms of
4527 "control" were broken. There should now be diagnostics for all cases when a
4528 control that does not make sense is encountered.
4530 7. $recipients is now available in the predata ACL (oversight).
4532 8. Tidy the search cache before the fork to do a delivery from a message
4533 received from the command line. Otherwise the child will trigger a lookup
4534 failure and thereby defer the delivery if it tries to use (for example) a
4535 cached ldap connection that the parent has called unbind on.
4537 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4538 of $address_data from the recipient verification was clobbered by the
4539 sender verification.
4541 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4542 was its contents. (It was OK if the option was not defined at all.)
4544 11. A "Completed" log line is now written for messages that are removed from
4545 the spool by the -Mrm option.
4547 12. $host_address is now set to the target address during the checking of
4548 ignore_target_hosts.
4550 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4551 being passed; this would have caused $sender_host_name to have been used if
4552 matching the list had actually called for a host name (not very likely,
4553 since this list is usually IP addresses). A host name is now passed as
4556 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4557 code that specifies a non-restarting handler (typically sigaction() in
4558 modern systems) in an attempt to fix a rare and obscure crash bug.
4560 15. Narrowed the window for a race in the daemon that could cause it to ignore
4561 SIGCHLD signals. This is not a major problem, because they are used only to
4562 wake it up if nothing else does.
4564 16. A malformed maildirsize file could cause Exim to calculate negative values
4565 for the mailbox size or file count. Odd effects could occur as a result.
4566 The maildirsize information is now recalculated if the size or filecount
4569 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4570 support for a long time. Removed HAVE_SYS_VFS_H.
4572 18. Updated exipick to current release from John Jetmore.
4574 19. Allow an empty sender to be matched against a lookup in an address list.
4575 Previously the only cases considered were a regular expression, or an
4578 20. Exim went into a mad DNS lookup loop when doing a callout where the
4579 host was specified on the transport, if the DNS lookup yielded more than
4582 21. The RFC2047 encoding function was originally intended for short strings
4583 such as real names; it was not keeping to the 75-character limit for
4584 encoded words that the RFC imposes. It now respects the limit, and
4585 generates multiple encoded words if necessary. To be on the safe side, I
4586 have increased the buffer size for the ${rfc2047: expansion operator from
4589 22. Failure to deliver a bounce message always caused it to be frozen, even if
4590 there was an errors_to setting on the router. The errors_to setting is now
4593 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4594 canonical form (fully expanded) before being placed in
4595 $sender_host_address.
4597 24. Updated eximstats to version 1.33
4599 25. Include certificate and key file names in error message when GnuTLS fails
4600 to set them up, because the GnuTLS error message doesn't include the name
4601 of the failing file when there is a problem reading it.
4603 26. Expand error message when OpenSSL has problems setting up cert/key files.
4606 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4607 (this can affect the format of dates).
4609 28. exim_tidydb, when checking for the continued existence of a message for
4610 which it has found a message-specific retry record, was not finding
4611 messages that were in split spool directories. Consequently, it was
4612 deleting retry records that should have stayed in existence.
4614 29. eximstats updated to version 1.35
4615 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4616 1.35 - bugfix such that pie charts by volume are generated correctly
4618 30. The SPA authentication driver was not abandoning authentication and moving
4619 on to the next authenticator when an expansion was forced to fail,
4620 contradicting the general specification for all authenticators. Instead it
4621 was generating a temporary error. It now behaves as specified.
4623 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4624 (the order specifies the preference for clients). The order is now AES256,
4625 AES128, 3DES, ARCFOUR128.
4627 31. Small patch to Sieve code - explicitly set From: when generating an
4630 32. Exim crashed if a remote delivery caused a very long error message to be
4631 recorded - for instance if somebody sent an entire SpamAssassin report back
4632 as a large number of 550 error lines. This bug was coincidentally fixed by
4633 increasing the size of one of Exim's internal buffers (big_buffer) that
4634 happened as part of the Exiscan merge. However, to be on the safe side, I
4635 have made the code more robust (and fixed the comments that describe what
4638 33. Some experimental protocols are using DNS PTR records for new purposes. The
4639 keys for these records are domain names, not reversed IP addresses. The
4640 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4641 leaves it alone. Component reversal etc. now happens only for IP addresses.
4644 34. The host_aton() function is supposed to be passed a string that is known
4645 to be a valid IP address. However, in the case of IPv6 addresses, it was
4646 not checking this. This is a hostage to fortune. Exim now panics and dies
4647 if the condition is not met. A case was found where this could be provoked
4648 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4649 components; fortuitously, this particular loophole had already been fixed
4650 by change 4.50/55 or 4.44/33 above.
4652 If there are any other similar loopholes, the new check in host_aton()
4653 itself should stop them being exploited. The report I received stated that
4654 data on the command line could provoke the exploit when Exim was running as
4655 exim, but did not say which command line option was involved. All I could
4656 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4657 running as the user.
4660 35. There was a buffer overflow vulnerability in the SPA authentication code
4661 (which came originally from the Samba project). I have added a test to the
4662 spa_base64_to_bits() function which I hope fixes it.
4665 36. The daemon start-up calls getloadavg() while still root for those OS that
4666 need the first call to be done as root, but it missed one case: when
4667 deliver_queue_load_max is set with deliver_drop_privilege. This is
4668 necessary for the benefit of the queue runner, because there is no re-exec
4669 when deliver_drop_privilege is set.
4671 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4672 was in use, was not putting the data itself into the right store pool;
4673 consequently, it could be overwritten for a subsequent message in the same
4674 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4677 38. Sometimes the final signoff response after QUIT could fail to get
4678 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4679 < 0 before doing a fflush(). This bug looks as though it goes back to the
4680 introduction of TLS in release 3.20, but "sometimes" must have been rare
4681 because the tests only now provoked it.
4687 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4688 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4689 Now it returns an integer. A number of calls were still expecting a T/F
4690 return. Fortuitously, in all cases, the tests worked in OK situations,
4691 which is the norm. However, things would have gone wrong on any write
4692 failures on the smtp file descriptor. This function is used when sending
4693 messages over SMTP and also when doing verify callouts.
4695 2. When Exim is called to do synchronous delivery of a locally submitted
4696 message (the -odf or -odi options), it no longer closes stderr before doing
4699 3. Implemented the mua_wrapper option.
4701 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4703 5. Implemented the functions header_remove(), header_testname(),
4704 header_add_at_position(), and receive_remove_recipient(), and exported them
4707 6. If an ACL "warn" statement specified the addition of headers, Exim already
4708 inserted X-ACL-Warn: at the start if there was no header name. However, it
4709 was not making this test for the second and subsequent header lines if
4710 there were newlines in the string. This meant that an invalid header could
4711 be inserted if Exim was badly configured.
4713 7. Allow an ACL "warn" statement to add header lines at the start or after all
4714 the Received: headers, as well as at the end.
4716 8. Added the rcpt_4xx retry error code.
4718 9. Added postmaster_mailfrom=xxx to callout verification option.
4720 10. Added mailfrom=xxxx to the callout verification option, for verify=
4723 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4724 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4726 12. Inserted some casts to stop certain compilers warning when using pointer
4727 differences as field lengths or precisions in printf-type calls (mostly
4728 affecting debugging statements).
4730 13. Added optional readline() support for -be (dynamically loaded).
4732 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4733 same clock tick as a message's arrival, so that its received time was the
4734 same as the "first fail" time on the retry record, and that message
4735 remained on the queue past the ultimate address timeout, every queue runner
4736 would try a delivery (because it was past the ultimate address timeout) but
4737 after another failure, the ultimate address timeout, which should have then
4738 bounced the address, did not kick in. This was a "< instead of <=" error;
4739 in most cases the first failure would have been in the next clock tick
4740 after the received time, and all would be well.
4742 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4743 being recognized when the domain list was tested by the match_domain
4744 condition in an expansion string.
4746 16. Added the ${str2b64: operator.
4748 17. Exim was always calling setrlimit() to set a large limit for the number of
4749 processes, without checking whether the existing limit was already
4750 adequate. (It did check for the limit on file descriptors.) Furthermore,
4751 errors from getrlimit() and setrlimit() were being ignored. Now they are
4752 logged to the main and panic logs, but Exim does carry on, to try to do its
4753 job under whatever limits there are.
4755 18. Imported PCRE 5.0.
4757 19. Trivial typo in log message " temporarily refused connection" (the leading
4760 20. If the log selector return_path_on_delivery was set and an address was
4761 redirected to /dev/null, the delivery process crashed because it assumed
4762 that a return path would always be set for a "successful" delivery. In this
4763 case, the whole delivery is bypassed as an optimization, and therefore no
4766 21. Internal re-arrangement: the function for sending a challenge and reading
4767 a response while authentication was assuming a zero-terminated challenge
4768 string. It's now changed to take a pointer and a length, to allow for
4769 binary data in such strings.
4771 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4773 23. Exim was not respecting finduser_retries when seeking the login of the
4774 uid under which it was called; it was always trying 10 times. (The default
4775 setting of finduser_retries is zero.) Also, it was sleeping after the final
4776 failure, which is pointless.
4778 24. Implemented tls_on_connect_ports.
4780 25. Implemented acl_smtp_predata.
4782 26. If the domain in control=submission is set empty, Exim assumes that the
4783 authenticated id is a complete email address when it generates From: or
4784 Sender: header lines.
4786 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4787 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4788 chown and chgrp in /bin and hostname in /usr/bin.
4790 28. Exim was keeping the "process log" file open after each use, just as it
4791 does for the main log. This opens the possibility of it remaining open for
4792 long periods when the USR1 signal hits a daemon. Occasional processlog
4793 errors were reported, that could have been caused by this. Anyway, it seems
4794 much more sensible not to leave this file open at all, so that is what now
4797 29. The long-running daemon process does not normally write to the log once it
4798 has entered its main loop, and it closes the log before doing so. This is
4799 so that log files can straightforwardly be renamed and moved. However,
4800 there are a couple of unusual error situations where the daemon does write
4801 log entries, and I had neglected to close the log afterwards.
4803 30. The text of an SMTP error response that was received during a remote
4804 delivery was being truncated at 512 bytes. This is too short for some of
4805 the long messages that one sometimes sees. I've increased the limit to
4808 31. It is now possible to make retry rules that apply only when a message has a
4809 specific sender, in particular, an empty sender.
4811 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4812 it possible to be selective about when SMTP synchronization is enforced.
4814 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4816 32. Implemented hosts_connection_nolog.
4818 33. Added an ACL for QUIT.
4820 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4823 35. Added mailbox_size and mailbox_filecount to appendfile.
4825 36. Added control = no_multiline_responses to ACLs.
4827 37. There was a bug in the logic of the code that waits for the clock to tick
4828 in the case where the clock went backwards by a substantial amount such
4829 that the microsecond fraction of "now" was more than the microsecond
4830 fraction of "then" (but the whole seconds number was less).
4832 38. Added support for the libradius Radius client library this is found on
4833 FreeBSD (previously only the radiusclient library was supported).
4839 1. When certain lookups returned multiple values in the form name=value, the
4840 quoting of the values was not always being done properly. Specifically:
4841 (a) If the value started with a double quote, but contained no whitespace,
4843 (b) If the value contained whitespace other than a space character (i.e.
4844 tabs or newlines or carriage returns) it was not quoted.
4845 This fix has been applied to the mysql and pgsql lookups by writing a
4846 separate quoting function and calling it from the lookup code. The fix
4847 should probably also be applied to nisplus, ibase and oracle lookups, but
4848 since I cannot test any of those, I have not disturbed their existing code.
4850 2. A hit in the callout cache for a specific address caused a log line with no
4851 reason for rejecting RCPT. Now it says "Previous (cached) callout
4852 verification failure".
4854 3. There was an off-by-one bug in the queryprogram router. An over-long
4855 return line was truncated at 256 instead of 255 characters, thereby
4856 overflowing its buffer with the terminating zero. As well as fixing this, I
4857 have increased the buffer size to 1024 (and made a note to document this).
4859 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4860 when Exim is waiting for an SMTP response from a remote server, Exim
4861 restarts its select() call on the socket, thereby resetting its timeout.
4862 This is not a problem when such interrupts are rare. Somebody set up a cron
4863 job to run exiwhat every 2 minutes, which is less than the normal select()
4864 timeout (5 or 10 minutes). This meant that the select() timeout never
4865 kicked in because it was always reset. I have fixed this by comparing the
4866 time when an interrupt arrives with the time at the start of the first call
4867 to select(). If more time than the timeout has elapsed, the interrupt is
4868 treated as a timeout.
4870 5. Some internal re-factoring in preparation for the addition of Sieve
4871 extensions (by MH). In particular, the "personal" test is moved to a
4872 separate function, and given an option for scanning Cc: and Bcc: (which is
4873 not set for Exim filters).
4875 6. When Exim created an email address using the login of the caller as the
4876 local part (e.g. when creating a From: or Sender: header line), it was not
4877 quoting the local part when it contained special characters such as @.
4879 7. Installed new OpenBSD configuration files.
4881 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4882 try to make them clearer.
4884 9. Callout options, other than the timeout value, were being ignored when
4885 verifying sender addresses in header lines. For example, when using
4887 verify = header_sender/callout=no_cache
4889 the cache was (incorrectly) being used.
4891 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4892 only the Cygwin environment.
4894 11. When return_path_on_delivery was set as a log selector, if different remote
4895 addresses in the same message used different return paths and parallel
4896 remote delivery occurred, the wrong values would sometimes be logged.
4897 (Whenever a remote delivery process finished, the return path value from
4898 the most recently started remote delivery process was logged.)
4900 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4901 lines when AUTH and/or TLS are in use. This is the "received protocol"
4902 field. Exim used to use "asmtp" for authenticated SMTP, without any
4903 indication (in the protocol name) for TLS use. Now it follows the RFC and
4904 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4905 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4906 names appear in log lines as well as in Received: header lines.
4908 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4909 extensions, and comparison tests, and to fix some bugs.
4911 14. Changes to the "personal" filter test:
4913 (1) The test was buggy in that it was just doing the equivalent of
4914 "contains" tests on header lines. For example, if a user's address was
4915 anne@some.where, the "personal" test would incorrectly be true for
4917 To: susanne@some.where
4919 This test is now done by extracting each address from the header in turn,
4920 and checking the entire address. Other tests that are part of "personal"
4921 are now done using regular expressions (for example, to check local parts
4922 of addresses in From: header lines).
4924 (2) The list of non-personal local parts in From: addresses has been
4925 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4926 taken from the Sieve specification recommendations.
4928 (3) If the message contains any header line starting with "List-" it is
4929 treated as non-personal.
4931 (4) The test for "circular" in the Subject: header line has been removed
4932 because it now seems ill-conceived.
4934 15. Minor typos in src/EDITME comments corrected.
4936 16. Installed latest exipick from John Jetmore.
4938 17. If headers_add on a router specified a text string that was too long for
4939 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4940 of string_sprintf() is now avoided.
4942 18. $message_body_size was not set (it was always zero) when running the DATA
4943 ACL and the local_scan() function.
4945 19. For the "mail" command in an Exim filter, no default was being set for
4946 the once_repeat time, causing a random time value to be used if "once" was
4947 specified. (If the value happened to be <= 0, no repeat happened.) The
4948 default is now 0s, meaning "never repeat". The "vacation" command was OK
4949 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4950 (I found it when inspecting the code).
4952 20. There is now an overall timeout for performing a callout verification. It
4953 defaults to 4 times the callout timeout, which applies to individual SMTP
4954 commands during the callout. The overall timeout applies when there is more
4955 than one host that can be tried. The timeout is checked before trying the
4956 next host. This prevents very long delays if there are a large number of
4957 hosts and all are timing out (e.g. when the network connections are timing
4958 out). The value of the overall timeout can be changed by specifying an
4959 additional sub-option for "callout", called "maxwait". For example:
4961 verify = sender/callout=5s,maxwait=20s
4963 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4964 to the end before writing, but this should make it even safer).
4966 22. Exim was forgetting that it had advertised PIPELINING for the second and
4967 subsequent messages on an SMTP connection. It was also not resetting its
4968 memory on STARTTLS and an internal HELO.
4970 23. When Exim logs an SMTP synchronization error within a session, it now
4971 records whether PIPELINING has been advertised or not.
4973 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4974 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4975 rather than long int.
4977 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4979 26. Added the never_mail option to autoreply.
4985 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4986 crash if the getsockname() call failed; this can happen if a connection is
4987 closed very soon after it is established. The problem was simply in the
4988 order in which certain operations were done, causing Exim to try to write
4989 to the SMTP stream before it had set up the file descriptor. The bug has
4990 been fixed by making things happen in the correct order.
4996 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4997 before the connection was closed, thus losing the rejection response.
4999 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5000 some early Solaris releases, but causes trouble in current releases where
5001 socklen_t is defined.
5003 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5006 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5009 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5010 that releasing the top of it at the end releases what was used for sub-
5011 expansions (unless the block got too big). However, discard this block if
5012 the first thing is a variable or header, so that we can use its block when
5013 it is dynamic (useful for very large $message_headers, for example).
5015 6. Lookups now cache *every* query, not just the most recent. A new, separate
5016 store pool is used for this. It can be recovered when all lookup caches are
5017 flushed. Lookups now release memory at the end of their result strings.
5018 This has involved some general refactoring of the lookup sources.
5020 7. Some code has been added to the store_xxx() functions to reduce the amount
5021 of flapping under certain conditions.
5023 8. log_incoming_interface used to affect only the <= reception log lines. Now
5024 it causes the local interface and port to be added to several more SMTP log
5025 lines, for example "SMTP connection from", and rejection lines.
5027 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5029 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5031 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5032 could be overwritten at the end of the current message (or the start of a
5033 new message if it was set in a HELO ACL). The value is now preserved for
5034 the duration of the SMTP connection.
5036 12. If a transport had a headers_rewrite setting, and a matching header line
5037 contained an unqualified address, that address was qualified, even if it
5038 did not match any rewriting rules. The underlying bug was that the values
5039 of the flags that permit the existence of unqualified sender and recipient
5040 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5041 non-local messages, and by -bnq for local messages) were not being
5042 preserved with the message after it was received.
5044 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5045 "next input=" as part of the text comprising the host identity instead of
5046 the correct text. The code was using the same buffer for two different
5047 strings. However, depending on which order the printing function evaluated
5048 its arguments, the bug did not always show up. Under Linux, for example, my
5049 test suite worked just fine.
5051 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5052 doesn't work with some older versions of Perl. It has been changed to "my",
5053 which in any case is probably the better facility to use.
5055 15. A really picky compiler found some instances of statements for creating
5056 error messages that either had too many or two few arguments for the format
5059 16. The size of the buffer for calls to the DNS resolver has been increased
5060 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5061 for addresses that have a lot of PTR records. This alleviates a problem; it
5062 does not fully solve it.
5064 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5065 buffer now truncates the list and logs the incident, which is the same
5066 action as happens when Exim is looking up a host name and its aliases.
5067 Previously in this situation something unpredictable would happen;
5068 sometimes it was "internal error: store_reset failed".
5070 18. If a server dropped the connection unexpectedly when an Exim client was
5071 using GnuTLS and trying to read a response, the client delivery process
5072 crashed while trying to generate an error log message.
5074 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5075 string, for example:
5077 warn message = H1: something\nH2: something
5079 the text was added as a single header line from Exim's point of view
5080 though it ended up OK in the delivered message. However, searching for the
5081 second and subsequent header lines using $h_h2: did not work. This has been
5082 fixed. Similarly, if a system filter added multiple headers in this way,
5083 the routers could not see them.
5085 20. Expanded the error message when iplsearch is called with an invalid key to
5086 suggest using net-iplsearch in a host list.
5088 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5089 ACLs are no longer actually imposed (and a message to that effect is
5092 22. If a "gecos" field in a passwd entry contained escaped characters, in
5093 particular, if it contained a \" sequence, Exim got it wrong when building
5094 a From: or a Sender: header from that name. A second bug also caused
5095 incorrect handling when an unquoted " was present following a character
5096 that needed quoting.
5098 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5099 was not being matched caselessly.
5101 24. Arranged for all hyphens in the exim.8 source to be escaped with
5104 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5105 properly. Recipient callout cache records were still being keyed to include
5106 the sender, even when use_sender was set false. This led to far more
5107 callouts that were necessary. The sender is no longer included in the key
5108 when use_sender is false.
5110 26. Added "control = submission" modifier to ACLs.
5112 27. Added the ${base62d: operator to decode base 62 numbers.
5114 28. dnsdb lookups can now access SRV records.
5116 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5117 the configuration file.
5119 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5120 (-v) mode. This makes the output for a verbose queue run more intelligible.
5122 31. Added a use_postmaster feature to recipient callouts.
5124 32. Added the $body_zerocount variable, containing the number of binary zero
5125 bytes in the message body.
5127 33. The time of last modification of the "new" subdirectory is now used as the
5128 "mailbox time last read" when there is a quota error for a maildir
5131 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5133 35. Added +ignore_unknown as a special item in host lists.
5135 36. Code for decoding IPv6 addresses in host lists is now included, even if
5136 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5137 address was recognized as an IP address, but was then not correctly decoded
5138 into binary, causing unexpected and incorrect effects when compared with
5145 1. Very minor rewording of debugging text in manualroute to say "list of
5146 hosts" instead of "hostlist".
5148 2. If verify=header_syntax was set, and a header line with an unqualified
5149 address (no domain) and a large number of spaces between the end of the
5150 name and the colon was received, the reception process suffered a buffer
5151 overflow, and (when I tested it) crashed. This was caused by some obsolete
5152 code that should have been removed. The fix is to remove it!
5154 3. When running in the test harness, delay a bit after writing a bounce
5155 message to get a bit more predictability in the log output.
5157 4. Added a call to search_tidyup() just before forking a reception process. In
5158 theory, someone could use a lookup in the expansion of smtp_accept_max_
5159 per_host which, without the tidyup, could leave open a database connection.
5161 5. Added the variables $recipient_data and $sender_data which get set from a
5162 lookup success in an ACL "recipients" or "senders" condition, or a router
5163 "senders" option, similar to $domain_data and $local_part_data.
5165 6. Moved the writing of debug_print from before to after the "senders" test
5168 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5169 problems for message scanning, either using a data ACL, or using
5170 local_scan() because the Received: header was not generated till after they
5171 were called (in order to set the time as the time of reception completion).
5172 I have revised the way this works. The header is now generated after the
5173 body is received, but before the ACL or local_scan() are called. After they
5174 are run, the timestamp in the header is updated.
5180 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5181 before starting a queue runner without re-exec. This happened only when
5182 deliver_drop_privilege was set or when the Exim user was set to root. The
5183 effect of the bug was that timeouts during subsequent deliveries caused
5184 crashes instead of being properly handled. The handler is now left at its
5185 default (and expected) setting.
5187 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5188 message, again when deliver_drop_privilege is set or Exim is run as root.
5189 The bug described in (1) was not present in this case, but the tidying up
5190 of the other signals was missing. I have made the two cases consistent.
5192 3. The ignore_target_hosts setting on a manualroute router was being ignored
5193 for hosts that were looked up using the /MX notation.
5195 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5198 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5199 operated on the sender address. After changing the $sender_address to <>
5200 for the sender address verify, Exim was re-instated it as the original
5201 (before rewriting) address, but remembering that it had rewritten it, so it
5202 wasn't rewriting it again. This bug also had the effect of breaking the
5203 sender address verification caching when the sender address was rewritten.
5205 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5206 This has been changed so that if the ip literal address matches
5207 ignore_target_hosts, the router declines.
5209 7. Added expansion conditions match_domain, match_address, and match_local_
5210 part (NOT match_host).
5212 8. The placeholder for the Received: header didn't have a length field set.
5214 9. Added code to Exim itself and to exim_lock to test for a specific race
5215 condition that could lead to file corruption when using MBX delivery. The
5216 issue is with the lockfile that is created in /tmp. If this file is removed
5217 after a process has opened it but before that process has acquired a lock,
5218 there is the potential for a second process to recreate the file and also
5219 acquire a lock. This could lead to two Exim processes writing to the file
5220 at the same time. The added code performs the same test as UW imapd; it
5221 checks after acquiring the lock that its file descriptor still refers to
5222 the same named file.
5224 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5225 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5228 11. Added the smtp_active_hostname option. If used, this will typically be made
5229 to depend on the incoming interface address. Because $interface_address is
5230 not set up until the daemon has forked a reception process, error responses
5231 that can happen earlier (such as "too many connections") no longer contain
5234 12. If an expansion in a condition on a "warn" statement fails because a lookup
5235 defers, the "warn" statement is abandoned, and the next ACL statement is
5236 processed. Previously this caused the whole ACL to be aborted.
5238 13. Added the iplsearch lookup type.
5240 14. Added ident_timeout as a log selector.
5242 15. Added tls_certificate_verified as a log selector.
5244 16. Added a global option tls_require_ciphers (compare the smtp transport
5245 option of the same name). This controls incoming TLS connections.
5247 17. I finally figured out how to make tls_require_ciphers do a similar thing
5248 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5249 before starting the TLS session.
5251 18. Tabs are now shown as \t in -bP output.
5253 19. If the log selector return_path_on_delivery was set, Exim crashed when
5254 bouncing a message because it had too many Received: header lines.
5256 20. If two routers both had headers_remove settings, and the first one included
5257 a superfluous trailing colon, the final name in the first list and the
5258 first name in the second list were incorrectly joined into one item (with a
5259 colon in the middle).
5265 1. Added -C and -D options to the exinext utility, mainly to make it easier
5266 to include in the automated testing, but these could be helpful when
5267 multiple configurations are in use.
5269 2. The exinext utility was not formatting the output nicely when there was
5270 an alternate port involved in the retry record key, nor when there was a
5271 message id as well (for retries that were specific to a specific message
5272 and a specific host). It was also confused by IPv6 addresses, because of
5273 the additional colons they contain. I have fixed the IPv4 problem, and
5274 patched it up to do a reasonable job for IPv6.
5276 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5277 delivery, the log line now contains "pipelined" if PIPELINING was used.
5279 4. An SMTP transport process used to panic and die if the bind() call to set
5280 an explicit outgoing interface failed. This has been changed; it is now
5281 treated in the same way as a connect() failure.
5283 5. A reference to $sender_host_name in the part of a conditional expansion
5284 that was being skipped was still causing a DNS lookup. This no longer
5287 6. The def: expansion condition was not recognizing references to header lines
5288 that used bh_ and bheader_.
5290 7. Added the _cache feature to named lists.
5292 8. The code for checking quota_filecount in the appendfile transport was
5293 allowing one more file than it should have been.
5295 9. For compatibility with Sendmail, the command line option
5303 and sets the incoming protocol and host name (for trusted callers). The
5304 host name and its colon can be omitted when only the protocol is to be set.
5305 Note the Exim already has two private options, -pd and -ps, that refer to
5306 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5307 "s", but I don't think that's a major issue.
5309 10. A number of refactoring changes to the code, none of which should affect
5312 (a) The number of logging options was getting close to filling up the
5313 32-bit word that was used as a bit map. I have split them into two classes:
5314 those that are passed in the argument to log_write(), and those that are
5315 only ever tested independently outside of that function. These are now in
5316 separate 32-bit words, so there is plenty of room for expansion again.
5317 There is no change in the user interface or the logging behaviour.
5319 (b) When building, for example, log lines, the code previously used a
5320 macro that called string_cat() twice, in order to add two strings. This is
5321 not really sufficiently general. Furthermore, there was one instance where
5322 it was actually wrong because one of the argument was used twice, and in
5323 one call a function was used. (As it happened, calling the function twice
5324 did not affect the overall behaviour.) The macro has been replaced by a
5325 function that can join an arbitrary number of extra strings onto a growing
5328 (c) The code for expansion conditions now uses a table and a binary chop
5329 instead of a serial search (which was left over from when there were very
5330 few conditions). Also, it now recognizes conditions like "pam" even when
5331 the relevant support is not compiled in: a suitably worded error message is
5332 given if an attempt is made to use such a condition.
5334 11. Added ${time_interval:xxxxx}.
5336 12. A bug was causing one of the ddress fields not to be passed back correctly
5337 from remote delivery subprocesses. The field in question was not being
5338 subsequently used, so this caused to problems in practice.
5340 13. Added new log selectors queue_time and deliver_time.
5342 14. Might have fixed a bug in maildirsizefile handling that threw up
5343 "unexpected character" debug warnings, and recalculated the data
5344 unnecessarily. In any case, I expanded the warning message to give more
5347 15. Added the message "Restricted characters in address" to the statements in
5348 the default ACL that block characters like @ and % in local parts.
5350 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5351 Three changes have been made:
5353 (a) There was a serious bug; a negative response to MAIL caused the whole
5354 recipient domain to be cached as invalid, thereby blocking all messages
5355 to all local parts at the same domain, from all senders. This bug has
5356 been fixed. The domain is no longer cached after a negative response to
5357 MAIL if the sender used is not empty.
5359 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5362 (c) A new callout option, "use_sender" has been added for people who want
5363 the modified behaviour.
5369 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5372 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5373 indeed breaks things for older releases.
5375 3. Added additional logging to the case where there is a problem reading data
5376 from a filter that is running in a subprocess using a pipe, in order to
5377 try to track down a specific problem.
5379 4. Testing facility fudge: when running in the test harness and attempting
5380 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5381 getting "No route to host". Convert this to a timeout.
5383 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5386 6. Some OS don't have socklen_t but use size_t instead. This affects the
5387 fifth argument of getsockopt() amongst other things. This is now
5388 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5389 can be set for individual OS. I have set it for SunOS5, OSF1, and
5390 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5391 some earlier ones do not.
5393 7. Change 4.30/15 was not doing the test caselessly.
5395 8. The standard form for an IPv6 address literal was being rejected by address
5396 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5397 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5398 this, as well as the form without the "IPv6" on the front (but only when
5399 address literals are enabled, of course).
5401 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5403 10. Exim crashed if a message with an empty sender address specified by -f
5404 encountered a router with an errors_to setting. This could be provoked only
5405 by a command such as
5409 where an empty string was supplied; "<>" did not hit this bug.
5411 11. Installed PCRE release 4.5.
5413 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5414 remained set. It is now erased.
5416 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5417 times from message ids (which are base 36 rather than the normal 62).
5419 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5420 were being counted as actual protocol errors, and logged if the log
5421 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5422 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5423 and DATA following a set of rejected RCPTs do not count as protocol errors.
5424 In other words, Exim assumes they were pipelined, though this may not
5425 actually be the case. Of course, in all cases the client gets an
5426 appropriate error code.
5428 15. If a lookup fails in an ACL condition, a message about the failure may
5429 be available; it is used if testing the ACL cannot continue, because most
5430 such messages specify what the cause of the deferral is. However, some
5431 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5432 that caused an old message to be retained and used if a later statement
5433 caused a defer, replacing the real cause of the deferral.
5435 16. If an IP address had so many PTR records that the DNS lookup buffer
5436 was not large enough to hold them, Exim could crash while trying to process
5437 the truncated data. It now detects and logs this case.
5439 17. Further to 4.21/58, another change has been made: if (and only if) the
5440 first line of a message (the first header line) ends with CRLF, a bare LF
5441 in a subsequent header line has a space inserted after it, so as not to
5442 terminate the header.
5444 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5445 unnecessarily, used atoi() instead of strtol(), and didn't check the
5446 termination when getting file sizes from file names by regex.
5448 19. Completely re-implemented the support for maildirsize files, in the light
5449 of a number of problems with the previous contributed implementation
5450 (4.30/29). In particular:
5452 . If the quota is zero, the maildirsize file is maintained, but no quota is
5455 . If the maildir directory does not exist, it is created before any attempt
5456 to write a maildirsize file.
5458 . The quota value in the file is just a cache; if the quota is changed in
5459 the transport, the new value overrides.
5461 . A regular expression is available for excluding directories from the
5464 20. The autoreply transport checks the characters in options that define the
5465 message's headers; it allows continued headers, but it was checking with
5466 isspace() after an embedded newline instead of explicitly looking for a
5469 21. If all the "regular" hosts to which an address was routed had passed their
5470 expiry times, and had not reached their retry times, the address was
5471 bounced, even if fallback hosts were defined. Now Exim should go on to try
5474 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5475 equivalent code in the SMTP transport. Some hosts send humungous responses
5476 to HELO/EHLO, more than 1024 it seems.
5478 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5479 gives compiler warnings in some environments. I've now done it "properly",
5482 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5483 (because of problems with the built-in one) was declared to return uschar *
5484 instead of char *, causing compiler failure.
5486 25. Fixed a file descriptor leak when processing alias/forward files.
5488 26. Fixed a minor format string issue in dbfn.c.
5490 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5492 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5493 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5496 29. When a sender address is verified, it is cached, to save repeating the test
5497 when there is more than one recipient in a message. However, when the
5498 verification involves a callout, it is possible for different callout
5499 options to be set for different recipients. It is too complicated to keep
5500 track of this in the cache, so now Exim always runs a verification when a
5501 callout is required, relying on the callout cache for the optimization.
5502 The overhead is duplication of the address routing, but this should not be
5505 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5506 to be verified with callout=postmaster, and the main callout worked but the
5507 postmaster check failed, the verification correctly failed. However, if a
5508 subsequent RCPT command asked for sender verification *without* the
5509 postmaster check, incorrect caching caused this verification also to fail,
5512 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5513 it was not caching the DNS options (qualify_single, search_parents) that
5514 were used when the lookup failed. A subsequent lookup with different
5515 options therefore always gave the same answer, though there were cases
5516 where it should not have. (Example: a "domains = !$mx_any" option on a
5517 dnslookup router: the "domains" option is always processed without any
5518 widening, but the router might have qualify_single set.) Now Exim uses the
5519 cached value only when the same options are set.
5521 32. Added John Jetmore's "exipick" utility to the distribution.
5523 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5524 than a timeout (e.g. a certificate is required, and is not provided), an
5525 Exim server now closes the connection immediately. Previously it waited for
5526 the client to close - but if the client is SSL, it seems that they each
5527 wait for each other, leading to a delay before one of them times out.
5529 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5530 maintained 0.8.x compatibility because I don't think many are using it, and
5531 it is clearly obsolete.
5533 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5536 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5537 client certificate was expired. A simple patch fixes this, though I don't
5538 understand the full logic of why the verify callback is called multiple
5541 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5542 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5543 which causes problems with some clients (such as the Certicom SSL Plus
5544 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5545 disables the coutermeasure allowing Eudora to connect."
5547 38. Exim was not checking that a write() to a log file succeeded. This could
5548 lead to Bad Things if a log got too big, in particular if it hit a file
5549 size limit. Exim now panics and dies if it cannot write to a log file, just
5550 as it does if it cannot open a log file.
5552 39. Modified OS/Makefile-Linux so that it now contains
5554 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5556 The two -D definitions ensure that Exim is compiled with large file
5557 support, which makes it possible to handle log files that are bigger than
5560 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5561 instance) a domain was checked against a named list that involved a lookup,
5562 causing $domain_data to be set, then another domain was checked against the
5563 same list, then the first domain was re-checked, the value of $domain_data
5564 after the final check could be wrong. In particular, if the second check
5565 failed, it could be set empty. This bug probably also applied to
5568 41. The strip_trailing_dot option was not being applied to the address given
5569 with the -f command-line option.
5571 42. The code for reading a message's header from the spool was incrementing
5572 $received_count, but never initializing it. This meant that the value was
5573 incorrect (doubled) while delivering a message in the same process in which
5574 it was received. In the most common configuration of Exim, this never
5575 happens - a fresh exec is done - but it can happen when
5576 deliver_drop_privilege is set.
5578 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5579 it now includes up to 150 characters of the unexpected data in the log
5582 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5583 and building data strings. The size of both of these buffers was 10 000
5584 bytes - far larger than anybody would *ever* want, thought I. Needless to
5585 say, somebody hit the limit. I have increased the maximum line length to
5586 20 000 and the maximum data length of concatenated lines to 100 000. I have
5587 also fixed two bugs, because there was no checking on these buffers. Tsk,
5588 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5589 buffer is too small.
5591 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5592 lsearch lookups. Now it does.
5594 46. When parsing a route_list item in a manualroute router, a fixed-length
5595 buffer was used for the list of hosts. I made this 1024 bytes long,
5596 thinking that nobody would ever have a list of hosts that long. Wrong.
5597 Somebody had a whole pile of complicated expansion conditions, and the
5598 string was silently truncated, leading to an expansion error. It turns out
5599 that it is easier to change to an unlimited length (owing to other changes
5600 that have happened since this code was originally written) than to build
5601 structure for giving a limitation error. The length of the item that
5602 expands into the list of hosts is now unlimited.
5604 47. The lsearch lookup could not handle data where the length of text line was
5605 more than 4095 characters. Such lines were truncated, leading to shortened
5606 data being returned. It should now handle lines of any length.
5608 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5609 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5612 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5613 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5614 no longer happens in comment lines. A list of replacements is now placed
5615 at the head of all of the source files, except those whose only change is
5616 to replace PERL_COMMAND in the very first #! line.
5618 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5619 messages on the queue, with a bottom-up merge sort, using code contributed
5620 by Michael Haardt. This should make operations like -bp somewhat faster on
5621 large queues. It won't affect queue runners, except when queue_run_in_order
5624 51. Installed eximstats 1.31 in the distribution.
5626 52. Added support for SRV lookups to the dnslookup router.
5628 53. If an ACL referred to $message_body or $message_body_end, the value was not
5629 reset for any messages that followed in the same SMTP session.
5631 54. The store-handling optimization for building very long strings was not
5632 differentiating between the different store pools. I don't think this
5633 actually made any difference in practice, but I've tidied it.
5635 55. While running the routers to verify a sender address, $sender_address
5636 was still set to the sender address. This is wrong, because when routing to
5637 send a bounce to the sender, it would be empty. Therefore, I have changed
5638 it so that, while verifying a sender address, $sender_address is set to <>.
5639 (There is no change to what happens when verifying a recipient address.)
5641 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5642 target A or AAAA records (if not already returned) without resetting the
5643 qualify_single or search_parents options of the DNS resolver. These are
5644 inappropriate in this case because the targets of MX and SRV records must
5645 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5646 target that, when qualified, matched something in the local domain. These
5647 two options are now turned off when doing these lookups.
5649 57. It seems that at least some releases of Reiserfs (which does not have the
5650 concept of a fixed number of inodes) returns zero and not -1 for the
5651 number of available inodes. This interacted badly with check_spool_inodes,
5652 which assumed that -1 was the "no such thing" setting. What I have done is
5653 to check that the total number of inodes is greater than zero before doing
5654 the test of how many are available.
5656 58. When a "warn" ACL statement has a log_message modifier, the message is
5657 remembered, and not repeated. This is to avoid a lot of repetition when a
5658 message has many recipients that cause the same warning to be written.
5659 However, Exim was preserving the list of already written lines for an
5660 entire SMTP session, which doesn't seem right. The memory is now reset if a
5661 new message is started.
5663 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5664 debugging output unless log_rewrite was also set.
5666 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5667 of (int)(handle) when we know that handle contains (void *)(-1).
5669 61. The Exim daemon panic-logs an error return when it closes the incoming
5670 connection. However "connection reset by peer" seems to be common, and
5671 isn't really an error worthy of noting specially, so that particular error
5674 62. When Exim is trying to find all the local interfaces, it used to panic and
5675 die if the ioctl to get the interface flags failed. However, it seems that
5676 on at least one OS (Solaris 9) it is possible to have an interface that is
5677 included in the list of interfaces, but for which you get a failure error
5678 for this call. This happens when the interface is not "plumbed" into a
5679 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5680 failure of the "get flags" call assumes that the interface is down.
5682 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5683 makes life easier for people who are doing arithmetic on fields extracted
5684 from dates, where you often get leading zeros that should not be
5685 interpreted as octal.
5687 64. Added qualify_domain to the redirect router, to override the global
5690 65. If a pathologically long header line contained very many addresses (the
5691 report of this problem mentioned 10 000) and each of them was rewritten,
5692 Exim could use up a very large amount of memory. (It kept on making new
5693 copies of the header line as it rewrote, and never released the old ones.)
5694 At the expense of a bit more processing, the header rewriting function has
5695 been changed so that it no longer eats memory in this way.
5697 66. The generation of the Received: header has been moved from the time that a
5698 message starts to be received, to the time that it finishes. The timestamp
5699 in the Received: header should now be very close to that of the <= log
5700 line. There are two side-effects of this change:
5702 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5703 logged header lines no longer include the local Received: line, because
5704 it has not yet been created. The same applies to a copy of the message
5705 that is returned to a non-SMTP sender when a message is rejected.
5707 (b) When a filter file is tested using -bf, no additional Received: header
5708 is added to the test message. After some thought, I decided that this
5711 This change does not affect the value of $received_for. It is still set
5712 after address rewriting, but before local_scan() is called.
5714 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5716 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5717 gave an unhelpful panic error message, and a defer error. I have managed to
5718 change this behaviour so that it now rejects any supplied certificate,
5719 which seems right, as the list of acceptable certificates is empty.
5721 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5722 gave an unhelpful defer error. I have not managed to make this reject any
5723 supplied certificates, but the error message it gives is "no certificate
5724 supplied", which is not helpful.
5726 70. exigrep's output now also includes lines that are not associated with any
5727 message, but which match the given pattern. Implemented by a patch from
5728 Martin Sluka, which also tidied up the Perl a bit.
5730 71. Recipient callout verification, like sender verification, was using <> in
5731 the MAIL FROM command. This isn't really the right thing, since the actual
5732 sender may affect whether the remote host accepts the recipient or not. I
5733 have changed it to use the actual sender in the callout; this means that
5734 the cache record is now keyed on a recipient/sender pair, not just the
5735 recipient address. There doesn't seem to be a real danger of callout loops,
5736 since a callout by the remote host to check the sender would use <>.
5737 [SEE ABOVE: changed after hitting problems.]
5739 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5740 temporary errors. However, in the case of such a code being given after
5741 the end of a data transmission (i.e. after ".") Exim was failing to write
5742 a retry record for the message. (Yes, there was some broken host that was
5743 actually sending 8xx at this point.)
5745 73. An unknown lookup type in a host list could cause Exim to panic-die when
5746 the list was checked. (An example that provoked this was putting <; in the
5747 middle of a list instead of at the start.) If this happened during a DATA
5748 ACL check, a -D file could be left lying around. This kind of configuration
5749 error no longer causes Exim to die; instead it causes a defer error. The
5750 incident is still logged to the main and panic logs.
5752 74. Buglet left over from Exim 3 conversion. The message "too many messages
5753 in one connection" was written to the rejectlog but not the mainlog, except
5754 when address rewriting (yes!) was being logged.
5756 75. Added write_rejectlog option.
5758 76. When a system filter was run not as root (that is, when system_filter_user
5759 was set), the values of the $n variables were not being returned to the
5760 main process; thus, they were not subsequently available in the $sn
5763 77. Added +return_path_on_delivery log selector.
5765 78. A connection timeout was being treated differently from recipients deferred
5766 when testing hosts_max_try with a message that was older than the host's
5767 retry timeout. (The host should not be counted, thus allowing all hosts to
5768 be tried at least once before bouncing.) This may have been the cause of an
5769 occasionally reported bug whereby a message would remain on the queue
5770 longer than the retry timeout, but would be bounced if a delivery was
5771 forced. I say "may" because I never totally pinned down the problem;
5772 setting up timeout/retry tests is difficult. See also the next item.
5774 79. The ultimate address timeout was not being applied to errors that involved
5775 a combination of host plus message (for example, a timeout on a MAIL
5776 command). When an address resolved to a number of possible hosts, and they
5777 were not all tried for each delivery (e.g. because of hosts_max_try), a
5778 message could remain on the queue longer than the retry timeout.
5780 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5783 81. Fixed an obscure SMTP outgoing bug which required at least the following
5784 conditions: (a) there was another message waiting for the same server;
5785 (b) the server returned 5xx to all RCPT commands in the first message so
5786 that the message was not completed; (c) the server dropped the connection
5787 or gave a negative response to the RSET that Exim sends to abort the
5788 transaction. The observed case was a dropped connection after DATA that had
5789 been sent in pipelining mode. That is, the server had advertised PIPELINING
5790 but was not implementing it correctly. The effect of the bug was incorrect
5791 behaviour, such as trying another host, and this could lead to a crash.
5797 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5798 and daemon.c were passed as pointers to ints; they should have been
5799 pointers to socklen_t variables (which are typically unsigned ints).
5801 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5804 3. Fixed a really odd bug that affected only the testing scheme; patching a
5805 certain fixed string in the binary changed the value of another string that
5806 happened to be identical to the end of the original first string.
5808 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5809 name", it returns that address as the IP address. On some operating
5810 systems (e.g. Solaris), it also passes back the IP address string as the
5811 "host name". However, on others (e.g. Linux), it passes back an empty
5812 string. Exim wasn't checking for this, and was changing the host name to an
5813 empty string, assuming it had been canonicalized.
5815 5. Although rare, it is permitted to have more than one PTR record for a given
5816 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5817 all the names associated with an address, because they do in Solaris.
5818 However, it seems that they do not in Linux for data that comes from the
5819 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5820 I found this out when I moved to a new Linux workstation and tried to run
5821 the Exim test suite.
5823 To get round this problem I have changed the code so that it now does its
5824 own call to the DNS to look up PTR records when searching for a host name.
5825 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5826 addresses that are only in /etc/hosts are still found.
5828 This behaviour is, however, controlled by an option called host_lookup_
5829 order, which defaults to "bydns:byaddr". If people want to use the other
5830 order, or indeed, just use one or the other means of lookup, they can
5831 specify it in this variable.
5833 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5834 some operating systems, this comes back from gethostbyaddr() as an empty
5835 string, and this is what Exim used to test for. However, it seems that in
5836 other systems, "." is yielded. Exim now tests for this case too.
5838 7. The values of check_spool_space and check_log_space are now held internally
5839 as a number of kilobytes instead of an absolute number of bytes. If a
5840 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5841 kilobyte. This means that much larger values can be stored.
5843 8. Exim monitor: an attempt to get the action menu when not actually pointing
5844 at a message produces an empty menu entitled "No message selected". This
5845 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5846 no entries in it ("Shell widget menu has zero width and/or height"). So I
5847 have added a single, blank menu entry in this case.
5849 9. Added ${quote_local_part.
5851 10. MIME decoding is now applied to the contents of Subject: header lines when
5854 11. Now that a reference to $sender_host_address automatically causes a reverse
5855 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5856 host lookup before query-style lookups in lists that might use this
5857 variable. This has therefore been abolished, and the "net-" prefix is no
5858 longer necessary for query-style lookups.
5860 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5861 have been a typo for LFLAGS, so it has been changed.
5863 13. The install script calls Exim with "-C /dev/null" in order to find the
5864 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5865 to be output. However, since Exim outputs its version number before the
5866 error, it didn't break the script. It just looked ugly. I fixed this by
5867 always allowing "-C /dev/null" if the caller is root.
5869 14. Ignore overlarge ACL variable number when reading spool file - insurance
5870 against a later release with more variables having written the file.
5872 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5873 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5874 this, as well as the form without the "IPv6" on the front.
5876 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5877 OS/Makefile-Darwin file.
5879 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5880 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5882 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5883 variable. However, some OS use ints for inodes. I've added cast to long int
5884 to get rid of the compiler warning.
5886 19. I had forgotten to lock out "/../" in configuration file names when
5887 ALT_CONFIG_PREFIX was set.
5889 20. Routers used for verification do not need to specify transports. However,
5890 if such a router generated a host list, and callout was configured, Exim
5891 crashed, because it could not find a port number from the (non-existent)
5892 transport. It now assumes port 25 in this circumstance.
5894 21. Added the -t option to exigrep.
5896 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5897 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5898 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5899 them is set, LOOKUP_LSEARCH is forced.
5901 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5903 24. Added sender and host information to the "rejected by local_scan()" log
5904 line; previously there was no indication of these.
5906 25. Added .include_if_exists.
5908 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5909 Linux. It turns out that not all file systems support this. Apparently some
5910 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5911 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5912 not supported on the file descriptor, is now ignored when Exim is trying to
5913 sync a directory. This applies only to Linux.
5915 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5917 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5918 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5921 29. Added support for maildirsize files from supplied patch (modified a bit).
5923 30. The use of :fail: followed by an empty string could lead Exim to respond to
5924 sender verification failures with (e.g.):
5926 550 Verification failed for <xxx>
5927 550 Sender verify failed
5929 where the first response line was missing the '-' that indicates it is not
5930 the final line of the response.
5932 31. The loop for finding the name of the user that called Exim had a hardwired
5933 limit of 10; it now uses the value of finduser_retries, which is used for
5934 all other user lookups.
5936 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5939 33. Exim was neglecting to zero errno before one call of strtol() when
5940 expanding a string and expecting an integer value. On some systems this
5941 resulted in spurious "integer overflow" errors. Also, it was casting the
5942 result into an int without checking.
5944 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5945 did not work. The code looks as if it has *never* worked, though it appears
5946 to have been documented since at least release 1.62. I have made it work.
5948 35. The "timeout_DNS" error in retry rules, also documented since at least
5949 1.62, also never worked. As it isn't clear exactly what this means, and
5950 clearly it isn't a major issue, I have abolished the feature by treating it
5951 as "timeout", and writing a warning to the main and panic logs.
5953 36. The display of retry rules for -brt wasn't always showing the error code
5956 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5957 timeout_connect_A, timeout_connect_MX.
5959 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5960 to the empty sender.
5962 39. The daemon was not analysing the content of -oX till after it had closed
5963 stderr and disconnected from the controlling terminal. This meant that any
5964 syntax errors were only noted on the panic log, and the return code from
5965 the command was 0. By re-arranging the code a little, I've made the
5966 decoding happen first, so such errors now appear on stderr, and the return
5967 code is 1. However, the actual setting up of the sockets still happens in
5968 the disconnected process, so errors there are still only recorded on the
5971 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5972 connections (as happens on some IP stacks) was logged at start up time as
5973 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5974 it from "IPv6 and IPv4", which means that two separate sockets are being
5977 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5978 says whether AF_INET or AF_INET6 was passed as an argument.
5980 42. Exiwhat output was messed up when time zones were included in log
5983 43. Exiwhat now gives more information about the daemon's listening ports,
5984 and whether -tls-on-connect was used.
5986 44. The "port" option of the smtp transport is now expanded.
5988 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5989 silently ignored. Now an error message is written to the main and panic
5992 46. There's a new ACL modifier called "logwrite" which writes to a log file
5993 as soon as it is encountered.
5995 47. Added $local_user_uid and $local_user_gid at routing time.
5997 48. Exim crashed when trying to verify a sender address that was being
6000 49. Exim was recognizing only a space character after ".include". It now also
6001 recognizes a tab character.
6003 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6004 extracting the relevant information from the specification. The man page no
6005 longer contains scrambled data for the -d option, and I've added a section
6006 at the front about calling Exim under different names.
6008 51. Added "extra_headers" argument to the "mail" command in filter files.
6010 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6013 53. Installed eximstats 1.29.
6015 54. Added transport_filter_timeout as a generic transport option.
6017 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6018 Cc: header lines. This was required by RFC 822, but it not required by RFC
6021 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6022 incoming messages that did not have them. Now it does so only if the
6023 message originates locally, that is, if there is no associated remote host
6024 address. When Resent- header lines are present, this applies to the Resent-
6025 lines rather than the non-Resent- lines.
6027 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6028 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6030 58. Messages for configuration errors now include the name of the main
6031 configuration file - useful now that there may be more than one file in a
6032 list (.included file names were always shown).
6034 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6035 for those rare installations that do not start the daemon as root or run it
6036 setuid root. I've cut out the call to initgroups() if the daemon is not
6039 60. The Exim user and group can now be bound into the binary as text strings
6040 that are looked up at the start of Exim's processing.
6042 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6044 62. Added $mailstore_basename variable.
6046 63. Installed patch to sieve.c from Michael Haardt.
6048 64. When Exim failed to open the panic log after failing to open the main log,
6049 the original message it was trying to log was written to stderr and debug
6050 output, but if they were not available (the usual case in production), it
6051 was lost. Now it is written to syslog before the two lines that record the
6052 failures to open the logs.
6054 65. Users' Exim filters run in subprocesses under the user's uid. It is
6055 possible for a "deliver" command or an alias in a "personal" command to
6056 provoke an address rewrite. If logging of address rewriting is configured,
6057 this fails because the process is not running as root or exim. There may be
6058 a better way of dealing with this, but for the moment (because 4.30 needs
6059 to be released), I have disabled address rewrite logging when running a
6060 filter in a non-root, non-exim process.
6066 1. The buildconfig auxiliary program wasn't quoting the value set for
6067 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6068 not defined. This bug was masked in 4.22 by the effect that was fixed in
6071 2. Some messages that were rejected after a message id was allocated were
6072 shown as "incomplete" by exigrep. It no longer does this for messages that
6073 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6075 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6076 have allow_domain_literals set, the ID did not get logged in the <= line.
6077 Domain literals are now always recognized in Message-ID: header lines.
6079 4. The first argument for a ${extract expansion item is the key name or field
6080 number. Leading and trailing spaces in this item were not being ignored,
6081 causing some misleading effects.
6083 5. When deliver_drop_privilege was set, single queue runner processes started
6084 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6085 same command in the process it spins off) were not dropping privilege.
6087 6. When the daemon running as "exim" started a queue runner, it always
6088 re-executed Exim in the spun-off process. This is a waste of effort when
6089 deliver_drop_privilege is set. The new process now just calls the
6090 queue-runner function directly.
6096 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6099 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6100 ignored. Though the use of -oP was forcing the writing of a pid file, it
6101 was always written to the default place.
6103 3. If the message "no IP address found for host xxxx" is generated during
6104 incoming verification, it is now followed by identification of the incoming
6105 connection (so you can more easily find what provoked it).
6107 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6109 5. Added some features to "harden" Exim a bit more against certain attacks:
6111 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6112 be put in Local/Makefile. This is like the never_users runtime option,
6113 but it cannot be overridden. The default setting is "root".
6115 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6116 prefix string with which any file named in a -C command line option
6119 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6120 is retained for -C and -D only if the caller of Exim is root. Without
6121 it, the exim user may also use -C and -D and retain privilege.
6123 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6124 command line option is disabled.
6126 6. Macro names set by the -D option must start with an upper case letter, just
6127 like macro names defined in the configuration file.
6129 7. Added "dereference=" facility to LDAP.
6131 8. Two instances of the typo "uknown" in the source files are fixed.
6133 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6134 the Configure-Makefile script screwed up while processing it.
6136 10. Incorporated PCRE 4.4.
6138 11. The SMTP synchronization check was not operating right at the start of an
6139 SMTP session. For example, it could not catch a HELO sent before the client
6140 waited for the greeting. There is now a check for outstanding input at the
6141 point when the greeting is written. Because of the duplex, asynchronous
6142 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6143 way, but not yet received, when the check is performed.
6145 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6146 on TCP/IP sockets, because this apparently causes some broken clients to
6149 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6150 unchanged) from the Cygwin maintainer.
6152 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6153 was supported instead of testing for mbx. Effectively a typo.
6155 15. The spa authenticator server code was not checking that the input it
6156 received was valid base64.
6158 16. The debug output line for the "set" modifier in ACLs was not showing the
6159 name of the variable that was being set.
6161 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6163 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6164 lookup on its own. Something else was needed to trigger the lookup. For
6165 example, a match in host_lookup or the need for a host name in a host list.
6166 Now, if $sender_host_name is referenced and the host name has not yet been
6167 looked up, a lookup is performed. If the lookup fails, the variable remains
6168 empty, and $host_lookup_failed is set to "1".
6170 19. Added "eqi" as a case-independent comparison operator.
6172 20. The saslauthd authentication condition could segfault if neither service
6173 nor realm was specified.
6175 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6176 error message that was logged was misleading, and incoming SMTP
6177 connections were dropped. The message is now more accurate, and temporary
6178 errors are given to SMTP connections.
6180 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6181 (except RSET) with a 421 error, until QUIT is received. However, it was
6182 failing to send a response to QUIT.
6184 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6185 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6186 ACL is now run after the helo_try_verify_hosts code.
6188 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6189 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6190 case-independent, so other case variants are also recognized). Apparently
6191 some systems use these upper case variants.
6193 25. If more than two messages were waiting for the same host, and a transport
6194 filter was specified for the transport, Exim sent two messages over the
6195 same TCP/IP connection, and then failed with "socket operation on non-
6196 socket" when it tried to send the third.
6198 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6200 27. The extern definition of crypt16() in expand.c was not being excluded when
6201 the OS had its own crypt16() function.
6203 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6204 as a preferred synonym for return_size_limit, both as an option and as an
6207 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6209 30. Changed the default configuration ACL to relax the local part checking rule
6210 for addresses that are not in any local domains. For these addresses,
6211 slashes and pipe symbols are allowed within local parts, but the sequence
6212 /../ is explicitly forbidden.
6214 31. SPA server authentication was not clearing the challenge buffer before
6217 32. log_message in a "warn" ACL statement was writing to the reject log as
6218 well as to the main log, which contradicts the documentation and doesn't
6219 seem right (because no rejection is happening). So I have stopped it.
6221 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6222 However, I am unable to do any testing of this.
6224 34. Fixed an infelicity in the appendfile transport. When checking directories
6225 for a mailbox, to see if any needed to be created, it was accidentally
6226 using path names with one or more superfluous leading slashes; tracing
6227 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6229 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6230 contents are added to the log line that is written for every discarded
6231 recipient. (Previously a log_message setting was ignored.)
6233 36. The ${quote: operator now quotes the string if it is empty.
6235 37. The install script runs exim in order to find its version number. If for
6236 some reason other than non-existence or emptiness, which it checks, it
6237 could not run './exim', it was installing it with an empty version number,
6238 i.e. as "exim-". This error state is now caught, and the installation is
6241 38. An argument was missing from the function that creates an error message
6242 when Exim fails to connect to the socket for saslauthd authentication.
6243 This could cause Exim to crash, or give a corrupted message.
6245 39. Added isip, isip4, and isip6 to ${if conditions.
6247 40. The ACL variables $acl_xx are now saved with the message, and can be
6248 accessed later in routers, transports, and filters.
6250 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6251 strings in the file are not string-expanded.
6253 42. If a MAIL command specified a SIZE value that was too large to fit into an
6254 int variable, the check against message_size_limit failed. Such values are
6255 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6256 day this will have to be increased, but I don't think I want to be around
6257 when emails are that large.
6264 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6265 iconv() is not standard in FreeBSD.
6267 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6268 IPv6 enabled. The observed symptom was a segmentation fault on return from
6269 the function os_common_find_running_interfaces() in src/os.c.
6271 3. In the check_special_case() function in daemon.c I had used "errno" as an
6272 argument name, which causes warnings on some systems. This was basically a
6273 typo, since it was named "eno" in the comments!
6275 4. The code that waits for the clock to tick (at a resolution of some fraction
6276 of a second) so as to ensure message-id uniqueness was always waiting for
6277 at least one whole tick, when it could have waited for less. [This is
6278 almost certainly not relevant at current processor speeds, where it is
6279 unlikely to ever wait at all. But we try to future-proof.]
6281 5. The function that sleeps for a time interval that includes fractions of a
6282 second contained a race. It did not block SIGALRM between setting the
6283 timer, and suspending (a couple of lines later). If the interval was short
6284 and the sigsuspend() was delayed until after it had expired, the suspension
6285 never ended. On busy systems this could lead to processes getting stuck for
6288 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6289 process, before it forks any delivery processes. The open lookup caching
6290 mechanism meant that the open file or database connection was passed into
6291 the delivery process. The problem was that delivery processes always tidy
6292 up cached lookup data. This could cause a problem for the next delivery
6293 process started by the queue runner, because the external queue runner
6294 process does not know about the closure. So the next delivery process
6295 still has data in the lookup cache. In the case of a file lookup, there was
6296 no problem because closing a file descriptor in a subprocess doesn't affect
6297 the parent. However, if the lookup was caching a connection to a database,
6298 the connection was closed, and the second delivery process was likely to
6299 see errors such as "PGSQL: query failed: server closed the connection
6300 unexpectedly". The problem has been fixed by closing all cached lookups
6301 in a queue runner before running a delivery process.
6303 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6304 seem to have the "const" qualifier which it has on other OS. I've
6307 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6308 *of the same type* (client or server) with the same public name that an
6309 error should be diagnosed.
6311 9. When Exim looked up a host name for an IP address, but failed to find the
6312 original IP address when looking up the host name (a safety check), it
6313 output the message "<ip address> does not match any IP for NULL", which was
6314 confusing, to say the least. The bug was that the host name should have
6315 appeared instead of "NULL".
6317 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6318 user that is built into the binary, and the -C or -D options is used, root
6319 privilege is dropped before the configuration file is read. In addition,
6320 logging is switched to stderr instead of the normal log files. If the
6321 configuration then re-defines the Exim user, the unprivileged environment
6322 is probably not what is expected, so Exim logs a panic warning message (but
6325 However, if deliver_drop_privilege is set, the unprivileged state may well
6326 be exactly what is intended, so the warning has been cut out in that case,
6327 and Exim is allowed to try to write to its normal log files.
6333 1. smtp_return_error_details was not giving details for temporary sender
6334 or receiver verification errors.
6336 2. Diagnose a configuration error if two authenticators have the same public
6339 3. Exim used not to create the message log file for a message until the first
6340 delivery attempt. This could be confusing when incoming messages were held
6341 for policy or load reasons. The message log file is now created at the time
6342 the message is received, and an initial "Received" line is written to it.
6344 4. The automatically generated man page for command line options had a minor
6345 bug that caused no ill effects; however, a more serious problem was that
6346 the procedure for building the man page automatically didn't always
6347 operate. Consequently, release 4.20 contains an out-of-date version. This
6348 shouldn't happen again.
6350 5. When building Exim with embedded Perl support, the script that builds the
6351 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6352 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6354 6. The freeze_tell option was not being used for messages that were frozen on
6355 arrival, either by an ACL or by local_scan().
6357 7. Added the smtp_incomplete_transaction log selector.
6359 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6360 was accepting AUTH without a new EHLO.
6362 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6363 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6366 10. Logging of TCP/IP connections (when configured) now happens in the main
6367 daemon process instead of the child process, so that the TCP/IP connection
6368 count is more accurate (but it can never be perfect).
6370 11. The use of "drop" in a nested ACL was not being handled correctly in the
6371 outer ACL. Now, if condition failure induced by the nested "drop" causes
6372 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6373 or "require"), the connection is dropped.
6375 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6376 that yield "discard" can now be used with an "accept" or a "discard" verb,
6377 but an error is generated for any others (because I can't see a useful way
6378 to define what should happen).
6380 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6381 are now processed in the same way as lines in the Exim configuration file.
6382 In particular, continuation lines are supported.
6384 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6386 15. Added -ti meaning -t -i.
6388 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6389 domains, and warn by logging if others are found.
6391 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6392 returned from GIFCONF when Exim is trying to find the list of interfaces on
6393 a host. The code in os.c has been modified to copy each ifreq to an aligned
6394 structure in all cases.
6396 Also, in some cases, the returned ifreq's were being copied to a 'struct
6397 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6398 means the last couple of bytes of an IPv6 address could be chopped if the
6399 ifreq contained only a normal sockaddr (14 bytes storage).
6401 18. Named domain lists were not supported in the hosts_treat_as_local option.
6402 An entry such as +xxxx was not recognized, and was treated as a literal
6405 19. Ensure that header lines added by a DATA ACL are included in the reject log
6406 if the ACL subsequently rejects the message.
6408 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6409 MD5 (which is deprecated).
6411 21. When testing a filter file using -bf, Exim was writing a message when it
6412 took the sender from a "From " line in the message, but it was not doing so
6413 when it took $return_path from a Return-Path: header line. It now does.
6415 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6416 with a valid header line field name (a series of printing characters
6417 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6419 23. Changed "disc" in the source to "disk" to conform to the documentation and
6420 the book and for uniformity.
6422 24. Ignore Sendmail's -Ooption=value command line item.
6424 25. When execve() failed while trying to run a command in a pipe transport,
6425 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6426 could be confused with a return value of 69 from the command itself. This
6427 has been changed to 127, the value the shell returns if it is asked to run
6428 a non-existent command. The wording for the related log line suggests a
6429 non-existent command as the problem.
6431 26. If received_header_text expands to an empty string, do not add a Received:
6432 header line to the message. (Well, it adds a token one on the spool, but
6433 marks it "old" so that it doesn't get used or transmitted.)
6435 27. Installed eximstats 1.28 (addition of -nt option).
6437 28. There was no check for failure on the call to getsockname() in the daemon
6438 code. This can fail if there is a shortage of resources on the system, with
6439 ENOMEM, for example. A temporary error is now given on failure.
6441 29. Contrary to the C standard, it seems that in some environments, the
6442 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6443 program. Exim now does this explicitly; it affects the formatting of
6444 timestamps using strftime().
6446 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6447 complaints. I've now initialized all the variables, to avoid this.
6449 32. Header lines added by a system filter were not being "seen" during
6450 transport-time rewrites.
6452 33. The info_callback() function passed to OpenSSL is set up with type void
6453 (*)(SSL *, int, int), as described somewhere. However, when calling the
6454 function (actually a macro) that sets it up, the type void(*)() is
6455 expected. I've put in a cast to prevent warnings from picky compilers.
6457 34. If a DNS black list lookup found a CNAME record, but there were no A
6458 records associated with the domain it pointed at, Exim crashed.
6460 35. If a DNS black list lookup returned more than one A record, Exim ignored
6461 all but the first. It now scans all returned addresses if a particular IP
6462 value is being sought. In this situation, the contents of the
6463 $dnslist_value variable are a list of all the addresses, separated by a
6466 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6467 to accept a host name and all its aliases if the forward lookup for any of
6468 them yielded the IP address of the incoming connection. Now it accepts only
6469 those names whose forward lookup yields the correct IP address. Any other
6470 names are discarded. This closes a loophole whereby a rogue DNS
6471 administrator could create reverse DNS records to break through a
6472 wildcarded host restriction in an ACL.
6474 37. If a user filter or a system filter that ran in a subprocess used any of
6475 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6476 the wrong values were passed to the pipe command ($thisaddress had the
6477 value of $0, $0 had the value of $1, etc). This bug was introduced by
6478 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6480 38. Improved the line breaking for long SMTP error messages from ACLs.
6481 Previously, if there was no break point between 40 and 75 characters, Exim
6482 left the rest of the message alone. Two changes have been made: (a) I've
6483 reduced the minimum length to 35 characters; (b) if it can't find a break
6484 point between 35 and 75 characters, it looks ahead and uses the first one
6485 that it finds. This may give the occasional overlong line, but at least the
6486 remaining text gets split now.
6488 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6489 file descriptors might be low, and that setting 1000 would always raise it.
6490 It turns out that in some environments, the limit is already over 1000 and
6491 that lowering it causes trouble. So now Exim takes care not to decrease it.
6493 40. When delivering a message, the value of $return_path is set to $sender_
6494 address at the start of routing (routers may change the value). By an
6495 oversight, this default was not being set up when an address was tested by
6496 -bt or -bv, which affected the outcome if any router or filter referred to
6499 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6500 log only when "message" or "log_message" are set. However, if one of the
6501 conditions was an address verification, or a call to a nested ACL, the
6502 messages generated by the underlying test were being passed through. This
6503 no longer happens. The underlying message is available in $acl_verify_
6504 message for both "message" and "log_message" expansions, so it can be
6505 passed through if needed.
6507 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6508 new expansion $bh_ to give the encoded byte string without charset
6509 translation. Translation happens only if iconv() is available; HAVE_ICONV
6510 indicates this at build time. HEADERS_CHARSET gives the charset to
6511 translate to; headers_charset can change it in the configuration, and
6512 "headers charset" can change it in an individual filter file.
6514 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6515 that creates RFC 2047 encoded "words" labels them as that charset instead
6516 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6517 expansion operator; (ii) when Exim creates a From: line for a local
6518 message; (iii) when a header line is rewritten to include a "phrase" part.
6520 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6521 buggy, causing it to skip the first lines of messages whose message ID
6522 ended in 'D'. This would not have bitten before Exim release 4.14, because
6523 message IDs were unlikely to end in 'D' before then. The effect was to have
6524 incorrect size information for certain domains.
6526 45. #include "config.h" was missing at the start of the crypt16.c module. This
6527 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6530 46. If there was a timeout during a "random" callout check, Exim treated it as
6531 a failure of the random address, and carried on sending RSET and the real
6532 address. If the delay was just some slowness somewhere, the response to the
6533 original RCPT would be taken as a response to RSET and so on, causing
6534 mayhem of various kinds.
6536 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6537 when I implemented it. It didn't allow for the fact that some option values
6538 may legitimately be negative (e.g. size_addition), and it didn't even do
6539 the right test for positive values.
6541 48. Domain names in DNS records are case-independent. Exim always looks them up
6542 in lower case. Some resolvers return domain names in exactly the case they
6543 appear in the zone file, that is, they may contain uppercase letters. Not
6544 all resolvers do this - some return always lower case. Exim was treating a
6545 change of case by a resolver as a change of domain, similar to a widening
6546 of a domain abbreviation. This triggered its re-routing code and so it was
6547 trying to route what was effectively the same domain again. This normally
6548 caused routing to fail (because the router wouldn't handle the domain
6549 twice). Now Exim checks for this case specially, and just changes the
6550 casing of the domain that it ultimately uses when it transmits the message
6553 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6556 50. If a filter generated a file delivery with a non-absolute name (possible if
6557 no home directory exists for the router), the forbid_file option was not
6560 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6561 the existing equality matching.
6563 52. Exim was using ints instead of ino_t variables in some places where it was
6564 dealing with inode numbers.
6566 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6567 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6568 called TMPDIR, and if it finds it is different, it changes its value.
6570 54. The smtp_printf() function is now made available to local_scan() so
6571 additional output lines can be written before returning. There is also an
6572 smtp_fflush() function to enable the detection of a dropped connection.
6573 The variables smtp_input and smtp_batched_input are exported to
6576 55. Changed the default runtime configuration: the message "Unknown user"
6577 has been removed from the ACL, and instead placed on the localuser router,
6578 using the cannot_route_message feature. This means that any verification
6579 failures that generate their own messages won't get overridden. Similarly,
6580 the "Unrouteable address" message that was in the ACL for unverifiable
6581 relay addresses has also been removed.
6583 56. Added hosts_avoid_esmtp to the smtp transport.
6585 57. The exicyclog script was not checking for the esoteric option
6586 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6587 will work only if exicyclog is run under the appropriate euid.
6589 58. Following a discussion on the list, the rules by which Exim recognises line
6590 endings on incoming messages have been changed. The -dropcr and drop_cr
6591 options are now no-ops, retained only for backwards compatibility. The
6592 following line terminators are recognized: LF CRLF CR. However, special
6593 processing applies to CR:
6595 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6596 nor a local message in the state where . is a terminator.
6598 (ii) If a bare CR is encountered in a header line, an extra space is added
6599 after the line terminator so as not to end the header. The reasoning
6600 behind this is that bare CRs in header lines are most likely either
6601 to be mistakes, or people trying to play silly games.
6603 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6604 was being incorrectly given as 18 bytes larger than it should have been.
6605 This is a VOB (very old bug).
6607 60. This may never have affected anything current, but just in case it has:
6608 When the local host is found other than at the start of a list of hosts,
6609 the local host, those with the same MX, and any that follow, are discarded.
6610 When the list in question was part of a longer list of hosts, the following
6611 hosts (not currently being processed) were also being discarded. This no
6612 longer happens. I'm not sure if this situation could ever has previously
6615 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6618 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6619 header. This is something that is recommended in a new Internet Draft, and
6620 is something that is documented as being done by Sendmail. There are two
6621 possible values. For messages generated by the autoreply transport, Exim
6624 Auto-Submitted: auto-replied
6626 whereas for all other generated messages (e.g. bounces) it adds
6628 Auto-Submitted: auto-generated
6630 63. The "personal" condition in filters now includes a test for the
6631 Auto-Submitted: header. If it contains the string "auto-" the message it
6632 not considered personal.
6634 64. Added rcpt_include_affixes as a generic transport option.
6636 65. Added queue_only_override (default true).
6638 66. Added the syslog_duplication option.
6640 67. If what should have been the first header line of a message consisted of
6641 a space followed by a colon, Exim was mis-interpreting it as a header line.
6642 It isn't of course - it is syntactically invalid and should therefore be
6643 treated as the start of the message body. The misbehaviour could have
6644 caused a number of strange effects, including loss of data in subsequent
6645 header lines, and spool format errors.
6647 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6648 client host had authenticated. This control can now be exercised by an ACL
6649 for more flexibility.
6651 69. By default, callouts do not happen when testing with -bh. There is now a
6652 variant, -bhc, which does actually run the callout code, including
6653 consulting and updating the callout cache.
6655 70. Added support for saslauthd authentication, courtesy of Alexander
6658 71. If statvfs() failed on the spool or log directories while checking their
6659 size for availability, Exim confusingly gave the error "space shortage".
6660 Furthermore, in debugging mode it crashed with a floating point exception.
6661 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6662 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6663 serious problem, Exim now writes to the main and panic logs when this
6664 happens, with details of the failure. It then refuses to accept the
6665 incoming message, giving the message "spool directory problem" or "log
6666 directory problem" with a 421 code for SMTP messages.
6668 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6669 0, 1, and 2 exist, because some OS complain for execs without them (see
6670 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6671 descriptors. However, the code omitted to check that the open succeeded,
6672 causing mysterious errors if for some reason the permissions on /dev/null
6673 got screwed. Now Exim writes a message to the main and panic logs, and
6674 bombs out if it can't open /dev/null.
6676 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6677 interact so that it is all more flexible. It is supposed to remain
6678 backwards compatible. Also added extra_local_interfaces.
6680 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6681 to bomb out with an assertion failure - to the client this appears as a
6682 connection drop. This problem occurs in the part of the code that was taken
6683 from the Samba project. Fortunately, the assertion is in a very simple
6684 function, so I have fixed this by reproducing the function inline in the
6685 one place where it is called, and arranging for authentication to fail
6686 instead of killing the process with assert().
6688 75. The SPA client code was not working when the server requested OEM rather
6689 than Unicode encoding.
6691 76. Added code to make require_files with a specific uid setting more usable in
6692 the case where statting the file as root fails - usually a non-root-mounted
6693 NFS file system. When this happens and the failure is EACCES, Exim now
6694 forks a subprocess and does the per-uid checking as the relevant uid.
6696 77. Added process_log_path.
6698 78. If log_file_path was not explicitly set, a setting of check_log_space or
6699 check_log_inodes was ignored.
6701 79. If a space check for the spool or log partitions fails, the incident is now
6702 logged. Of course, in the latter case the data may get lost...
6704 80. Added the %p formatting code to string_format() so that it can be used to
6705 print addresses in debug_print(). Adjusted all the address printing in the
6706 debugging in store.c to use %p rather than %d.
6708 81. There was a concern that a line of code in smtp_in.c could overflow a
6709 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6710 initially expressed, the concern was not well-founded, because trailing
6711 spaces are removed early. However, if the trailing spaces were followed by
6712 a NULL, they did not get removed, so the overflow was possible. Two fixes
6715 (a) I re-wrote the offending code in a cleaner fashion.
6716 (b) If an incoming SMTP command contains a NULL character, it is rejected
6719 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6720 runs initgroups(), so that if the Exim user is in any additional groups,
6721 they will be used during message reception.
6727 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob