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.
13 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
14 supports it and a size is available (ie. the sending peer gave us one).
16 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
17 years of being deprecated). The replacements are the ACLs
18 acl_smtp_mime and acl_not_smtp_mime.
20 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
21 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
22 or even an in-clear connection were permitted. Now, if the host lookup
23 was dnssec and dane was requested then the host is only used if the
24 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
25 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
26 if one fails this test.
27 This means that a poorly-configured remote DNS will make it incommunicado;
28 but it protects against a DNS-interception attack on it.
30 JH/04 Bug 1810: make continued-use of an open smtp transport connection
31 non-noisy when a race steals the message being considered.
33 JH/05 If main configuration option tls_certificate is unset, generate a
34 self-signed certificate for inbound TLS connections.
36 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
37 in rewrites and routers.
39 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
40 and logged a warning sing 4.83; now they are a configuration file error.
42 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
43 (lacking @domain). Apply the same qualification processing as RCPT.
45 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
47 JH/10 Support ${sha256:} applied to a string (as well as the previous
50 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
51 a cutthrough deliver is pending, as we always want to make a connection.
52 This also avoids re-routing the message when later placing the cutthrough
53 connection after a verify cache hit.
54 Do not update it with the verify result either.
56 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
57 when routing results in more than one destination address.
59 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
60 signing (which inhibits the cutthrough capability). Previously only
61 the presence of an option was tested; now an expansion evaluating as
62 empty is permissible (obviously it should depend only on data available
63 when the cutthrough connection is made).
65 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
66 the relevant preceding SMTP command did not note the pipelining mode.
68 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
69 Previously they were not counted.
71 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
72 as one having no matching records. Previously we deferred the message
73 that needed the lookup.
75 JH/17 Fakereject: previously logged as a norml message arrival "<="; now
76 distinguished as "(=".
78 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
79 for missing MX records. Previously it only worked for missing A records.
81 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
83 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
84 after the data-go-ahead and data-ack. Patch from Jason Betts.
86 JH/21 Bug 1846: Send DMARC forensic reports for reject and quaratine results,
87 even for a "none" policy. Patch from Tony Meyer.
89 JH/22 Fix continued use of a connection for further deliveries. If a port was
90 specified by a router, it must also match for the delivery to be
93 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
94 When one of the recipients of a message was unsuitable for the connection
95 (has no matching addresses), we lost track of needing to mark it
96 deferred. As a result mail would be lost.
98 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
100 JH/25 Decoding ACL controls is now done using a binary search; the source code
101 takes up less space and should be simpler to maintain. Merge the ACL
102 condition decode tables also, with similar effect.
104 JH/26 Fix problem with one_time used on a redirect router which returned the
105 parent address unchanged. A retry would see the parent address marked as
106 delivered, so not attempt the (identical) child. As a result mail would
109 JH/27 Fix a possible security hole, wherein a process operating with the Exim
110 UID can gain a root shell. Credit to http://www.halfdog.net/ for
111 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
114 JH/28 Enable {spool,log} filesystem space and inode checks as default.
115 Main config options check_{log,spool}_{inodes,space} are now
116 100 inodes, 10MB unless set otherwise in the configuration.
118 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
119 Previously it only applied to the main-section connection policy
122 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
124 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
125 by me. Added RFC7919 DH primes as an alternative.
127 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
128 are not in the system include path.
130 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
131 GnuTLS, when a session startup failed (eg because the client disconnected)
132 Exim did stdio operations after fclose. This was exposed by a recent
133 change which nulled out the file handle after the fclose.
135 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
136 signed directly by the cert-signing cert, rather than an intermediate
137 OCSP-signing cert. This is the model used by LetsEncrypt.
139 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
141 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
142 an incoming connection.
144 HS/02 Bug 1802: Do not half-close the connection after sending a request
147 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
148 fallback to "prime256v1".
150 JH/34 SECURITY: Use proper copy of DATA command in error message.
151 Could leak key material. Remotely explaoitable. CVE-2016-9963.
156 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
157 and 3.4.4 - once the server is enabled to respond to an OCSP request
158 it does even when not requested, resulting in a stapling non-aware
159 client dropping the TLS connection.
161 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
162 support variable-length bit vectors. No functional change.
164 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
165 The I= interface field on outgoing lines is now after the H= remote
166 host field, same as incoming lines. There is a separate
167 outgoing_interface log selector which allows you to disable the
170 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
171 If not running log_selector +smtp_connection the mainlog would be held
172 open indefinitely after a "too many connections" event, including to a
173 deleted file after a log rotate. Leave the per net connection logging
174 leaving it open for efficiency as that will be quickly detected by the
175 check on the next write.
177 HS/01 Bug 1671: Fix post transport crash.
178 Processing the wait-<transport> messages could crash the delivery
179 process if the message IDs didn't exist for some reason. When
180 using 'split_spool_directory=yes' the construction of the spool
181 file name failed already, exposing the same netto behaviour.
183 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
184 mime_regex ACL conditions.
186 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
187 to DSN fail messages (bounces): remote IP, remote greeting, remote response
188 to HELO, local diagnostic string.
190 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
191 log line to debug. Even when configured with a tls authenticator many
192 client connections are expected to not authenticate in this way, so
193 an authenticate fail is not an error.
195 HS/02 Add the Exim version string to the process info. This way exiwhat
196 gives some more detail about the running daemon.
198 JH/06 Bug 1395: time-limit cacheing of DNS lookups, to the TTL value. This may
199 matter for fast-change records such as DNSBLs.
201 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
202 retry record, even if constant. There may be multiple transports with
203 different interface settings and the retry behaviour needs to be kept
206 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
208 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
210 JH/10 Bug 840: fix log_defer_output option of pipe transport
212 JH/11 Bug 830: use same host for all RCPTS of a message, even under
213 hosts_randomize. This matters a lot when combined with mua_wrapper.
215 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
216 ${quote_pgsql:<string>} operator.
218 JH/13 Bug 1708: avoid misaligned access in cached lookup.
220 JH/14 Change header file name for freeradius-client. Relevant if compiling
221 with Radius support; from the Gentoo tree and checked under Fedora.
223 JH/15 Bug 1712: Introduce $prdr_requested flag variable
225 JH/16 Bug 1714: Permit an empty string as expansion result for transport
226 option transport_filter, meaning no filtering.
228 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
230 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
231 defaults to "*" (all hosts). The variable is now available when not built
232 with TLS, default unset, mainly to enable keeping the testuite sane.
233 If a server certificate is not supplied (via tls_certificate) an error is
234 logged, and clients will find TLS connections fail on startup. Presumably
235 they will retry in-clear.
236 Packagers of Exim are strongly encouraged to create a server certificate
237 at installation time.
239 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
240 with the $config_file variable.
242 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
243 in transport context, after the attempt, and per-recipient. The latter type
244 is per host attempted. The event data is the error message, and the errno
245 information encodes the lookup type (A vs. MX) used for the (first) host,
246 and the trailing two digits of the smtp 4xx reponse.
248 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
249 to write to mainlog (or rejectlog, paniclog) in the window between file
250 creation and permissions/ownership being changed. Particularly affects
251 installations where exicyclog is run as root, rather than exim user;
252 result is that the running daemon panics and dies.
254 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
256 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
257 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
258 "pri" and "weight". Note that the previous implicit priority given by the
259 list order is no longer honoured.
261 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalisation
264 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
265 by defining SUPPORT_SOCKS.
267 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
268 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
269 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
270 variables are renamed to proxy_{local,external}_{address,port}.
272 JH/27 Move Internationalisation support from Experimental to mainline, enabled
273 for a build by defining SUPPORT_I18N
275 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
276 of the query string, and make ${quote_redis:} do that quoting.
278 JH/29 Move Events support from Experimental to mainline, enabled by default
279 and removable for a build by defining DISABLE_EVENT.
281 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
283 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
284 cached by the daemon.
286 JH/32 Move Redis support from Experimental to mainline, enabled for a build
287 by defining LOOKUP_REDIS. The libhiredis library is required.
289 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
290 keys are given for lookup.
292 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
293 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
294 only supported when built with TLS support. The PolarSSL SHA routines
295 are still used when the TLS library is too old for convenient support.
297 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
298 openssl_options), for security. OpenSSL forces this from version 1.1.0
299 server-side so match that on older versions.
301 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
302 allocation for $value could be released as the expansion processing
303 concluded, but leaving the global pointer active for it.
305 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
306 and to use the domains and local_parts ACL conditions.
308 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
309 incorrectly not doubled on cutthrough transmission, hence seen as a
310 body-termination at the receiving system - resulting in truncated mails.
311 Commonly the sender saw a TCP-level error, and retransmitted the message
312 via the normal store-and-forward channel. This could result in duplicates
313 received - but deduplicating mailstores were liable to retain only the
314 initial truncated version.
316 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
318 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
320 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
321 we're in there, support oversigning also; bug 1309.
323 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
325 HS/04 Add support for keep_environment and add_environment options.
327 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
328 either intentional arithmetic overflow during PRNG, or testing config-
331 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
332 delivery resulted in actual delivery. Cancel cutthrough before DATA
335 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
336 rejects a recipient: pass the reject to the originator.
338 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
339 Many were false-positives and ignorable, but it's worth fixing the
342 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
343 for the new environment-manipulation done at startup. Move the routines
344 from being local to tls.c to being global via the os.c file.
346 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
347 an extract embedded as result-arg for a map, the first arg for extract
348 is unavailable so we cannot tell if this is a numbered or keyed
349 extraction. Accept either.
355 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
358 JH/02 The smtp transport option "multi_domain" is now expanded.
360 JH/03 The smtp transport now requests PRDR by default, if the server offers
363 JH/04 Certificate name checking on server certificates, when exim is a client,
364 is now done by default. The transport option tls_verify_cert_hostnames
365 can be used to disable this per-host. The build option
366 EXPERIMENTAL_CERTNAMES is withdrawn.
368 JH/05 The value of the tls_verify_certificates smtp transport and main options
369 default to the word "system" to access the system default CA bundle.
370 For GnuTLS, only version 3.0.20 or later.
372 JH/06 Verification of the server certificate for a TLS connection is now tried
373 (but not required) by default. The verification status is now logged by
374 default, for both outbound TLS and client-certificate supplying inbound
377 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
380 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
381 Status Notification (bounce) messages are now MIME format per RFC 3464.
382 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
383 under the control of the dsn_advertise_hosts option, and routers may
384 have a dsn_lasthop option.
386 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
387 default, modifiable by a malware= option. The list separator for
388 the options can now be changed in the usual way. Bug 68.
390 JH/10 The smtp_receive_timeout main option is now expanded before use.
392 JH/11 The incoming_interface log option now also enables logging of the
393 local interface on delivery outgoing connections.
395 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
396 if the interface and destination host and port all match.
398 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
401 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
402 Patch from Andrew Lewis.
404 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
405 now supports optional time-restrictions, weighting, and priority
406 modifiers per server. Patch originally by <rommer@active.by>.
408 JH/16 The spamd_address main option now supports a mixed list of local
409 and remote servers. Remote servers can be IPv6 addresses, and
410 specify a port-range.
412 JH/17 Bug 68: The spamd_address main option now supports an optional
413 timeout value per server.
415 JH/18 Bug 1581: Router and transport options headers_add/remove can
416 now have the list separator specified.
418 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
421 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
424 JH/21 Support for the A6 type of dns record is withdrawn.
426 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
427 rather than the verbs used.
429 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
430 from 255 to 1024 chars.
432 JH/24 Verification callouts now attempt to use TLS by default.
434 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
435 are generic router options now. The defaults didn't change.
437 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
438 Original patch from Alexander Shikoff, worked over by JH.
440 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
441 files if ZCAT_COMMAND is not executable.
443 JH/26 Bug 1539: Add timout/retry options on dnsdb lookups.
445 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
447 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
448 Normally benign, it bites when the pair was led to by a CNAME;
449 modern usage is to not canoicalize the domain to a CNAME target
450 (and we were inconsistent anyway for A-only vs AAAA+A).
452 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
454 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
455 when evaluating $sender_host_dnssec.
457 JH/31 Check the HELO verification lookup for DNSSEC, adding new
458 $sender_helo_dnssec variable.
460 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
462 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
464 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
466 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
467 documented as working, but never had. Support all but $spam_report.
469 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
470 added for tls authenticator.
472 HS/03 Add perl_taintmode main config option
477 TL/01 When running the test suite, the README says that variables such as
478 no_msglog_check are global and can be placed anywhere in a specific
479 test's script, however it was observed that placement needed to be near
480 the beginning for it to behave that way. Changed the runtest perl
481 script to read through the entire script once to detect and set these
482 variables, reset to the beginning of the script, and then run through
483 the script parsing/test process like normal.
485 TL/02 The BSD's have an arc4random API. One of the functions to induce
486 adding randomness was arc4random_stir(), but it has been removed in
487 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
488 function when detected.
490 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
491 cause callback expansion.
493 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
494 syntax errors in an expansion can be treated as a string instead of
495 logging or causing an error, due to the internal use of bool_lax
496 instead of bool when processing it.
498 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
499 server certificates when making smtp deliveries.
501 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
503 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
505 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
507 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
508 Merged patch from Sebastian Wiedenroth.
510 JH/05 Fix results-pipe from transport process. Several recipients, combined
511 with certificate use, exposed issues where response data items split
512 over buffer boundaries were not parsed properly. This eventually
513 resulted in duplicates being sent. This issue only became common enough
514 to notice due to the introduction of conection certificate information,
515 the item size being so much larger. Found and fixed by Wolfgang Breyha.
517 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
518 size buffer was used, resulting in syntax errors when an expansion
521 JH/07 Add support for directories of certificates when compiled with a GnuTLS
522 version 3.3.6 or later.
524 JH/08 Rename the TPDA expermimental facility to Event Actions. The #ifdef
525 is EXPERIMENTAL_EVENT, the main-configuration and transport options
526 both become "event_action", the variables become $event_name, $event_data
527 and $event_defer_errno. There is a new variable $verify_mode, usable in
528 routers, transports and related events. The tls:cert event is now also
529 raised for inbound connections, if the main configuration event_action
532 TL/06 In test suite, disable OCSP for old versions of openssl which contained
533 early OCSP support, but no stapling (appears to be less than 1.0.0).
535 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
536 server certificate names available under the smtp transport option
537 "tls_verify_cert_hostname" now do not permit multi-component wildcard
540 JH/10 Time-related extraction expansions from certificates now use the main
541 option "timezone" setting for output formatting, and are consistent
542 between OpenSSL and GnuTLS compilations. Bug 1541.
544 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
545 encoded parameter in the incoming message. Bug 1558.
547 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
548 include certificate info, eximon was claiming there were spoolfile
551 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
553 JH/14 Log delivery-related information more consistently, using the sequence
554 "H=<name> [<ip>]" wherever possible.
556 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
557 are problematic for Debian distribution, omit them from the release
560 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
562 JH/16 Fix string representation of time values on 64bit time_t anchitectures.
565 JH/17 Fix a null-indirection in certextract expansions when a nondefault
566 output list separator was used.
571 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
572 checkers that were complaining about end of non-void function with no
575 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
576 This was a regression intruduced in 4.83 by another bugfix.
578 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
580 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
581 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
587 TF/01 Correctly close the server side of TLS when forking for delivery.
589 When a message was received over SMTP with TLS, Exim failed to clear up
590 the incoming connection properly after forking off the child process to
591 deliver the message. In some situations the subsequent outgoing
592 delivery connection happened to have the same fd number as the incoming
593 connection previously had. Exim would try to use TLS and fail, logging
594 a "Bad file descriptor" error.
596 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
597 utilities have not been installed.
599 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
600 temporary space as the ACL may create new global variables.
602 TL/01 LDAP support uses per connection or global context settings, depending
603 upon the detected version of the libraries at build time.
605 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
606 to extract and use the src ip:port in logging and expansions as if it
607 were a direct connection from the outside internet. PPv2 support was
608 updated based on HAProxy spec change in May 2014.
610 JH/02 Add ${listextract {number}{list}{success}{fail}}.
612 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
613 Properly escape header and check for NULL return.
615 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
618 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
620 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
621 characters in header names, implemented as a verify condition.
622 Contributed by Michael Fischer v. Mollard.
624 TL/05 Rename SPF condition results err_perm and err_temp to standardized
625 results permerror and temperror. Previous values are deprecated but
626 still accepted. In a future release, err_perm and err_temp will be
627 completely removed, which will be a backward incompatibility if the
628 ACL tests for either of these two old results. Patch contributed by
629 user bes-internal on the mailing list.
631 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
633 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
634 selectors, in both main and reject logs.
636 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
639 JH/07 Add malware type "sock" for talking to simple daemon.
641 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
643 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
644 routers/transports under cutthrough routing.
646 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
647 numbers. Touch up "bool" conditional to keep the same definition.
649 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
651 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
653 JH/12 Expand items in router/transport headers_add or headers_remove lists
654 individually rather than the list as a whole. Bug 1452.
656 Required for reasonable handling of multiple headers_ options when
657 they may be empty; requires that headers_remove items with embedded
658 colons must have them doubled (or the list-separator changed).
660 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
661 view the policy declared in the DMARC record. Currently, $dmarc_status
662 is a combined value of both the record presence and the result of the
665 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
667 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
668 dnslookup router and the smtp transport (applying to the forward
671 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
672 of ldap servers used for a specific lookup. Patch provided by Heiko
675 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
676 New variable $lookup_dnssec_authenticated for observability.
678 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
679 Patch submitted by Lars Timman.
681 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
683 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
684 Requires trusted mode and valid format message id, aborts otherwise.
685 Patch contributed by Heiko Schlichting.
687 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
688 certextract with support for various fields. Bug 1358.
690 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
691 is requested by default, modifiable by smtp transport option
694 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
695 operate on certificate variables to give certificate fingerprints
696 Also new ${sha256:cert_variable}.
698 JH/23 The PRDR feature is moved from being Experimental into the mainline.
700 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
701 Christian Aistleitner.
703 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
705 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
706 file. Patch from Wolfgang Breyha.
708 JH/25 Expand the coverage of the delivery $host and $host_address to
709 client authenticators run in verify callout. Bug 1476.
711 JH/26 Port service names are now accepted for tls_on_connect_ports, to
712 align with daemon_smtp_ports. Bug 72.
714 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
715 support and error reporting did not work properly.
717 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
718 and is readable. Patch from Andrew Colin Kissa.
720 TL/14 Enhance documentation of ${run expansion and how it parses the
721 commandline after expansion, particularly in the case when an
722 unquoted variable expansion results in an empty value.
724 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
726 PP/02 Fix internal collision of T_APL on systems which support RFC3123
727 by renaming away from it. Addresses GH issue 15, reported by
730 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
732 TL/15 SECURITY: prevent double expansion in math comparison functions
733 (can expand unsanitized data). Not remotely exploitable.
740 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
742 PP/02 Make -n do something, by making it not do something.
743 When combined with -bP, the name of an option is not output.
745 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
748 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
749 $sender_host_name and config options to manage this, and basic check
752 PP/05 DSCP support for outbound connections and control modifier for inbound.
754 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
755 (Only plugin which currently uses this is kerberos4, which nobody should
756 be using, but we should make it available and other future plugins might
757 conceivably use it, even though it would break NAT; stuff *should* be
758 using channel bindings instead).
760 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
761 name; added for Sendmail compatibility; requires admin caller.
762 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
763 just ignore it); requires trusted caller.
764 Also parse but ignore: -Ac -Am -X<logfile>
767 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
769 TL/02 Add +smtp_confirmation as a default logging option.
771 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
772 Patch by Magnus Holmgren from 2007-02-20.
774 TL/04 Bugzilla 1281 - Spec typo.
775 Bugzilla 1283 - Spec typo.
776 Bugzilla 1290 - Spec grammar fixes.
778 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
780 TL/06 Add Experimental DMARC support using libopendmarc libraries.
782 TL/07 Fix an out of order global option causing a segfault. Reported to dev
783 mailing list by by Dmitry Isaikin.
785 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
787 JH/02 Support "G" suffix to numbers in ${if comparisons.
789 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
791 NM/01 Bugzilla 1197 - Spec typo
792 Bugzilla 1196 - Spec examples corrections
794 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
796 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
797 gnutls_enable_pkcs11, but renamed to more accurately indicate its
800 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
801 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
803 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
804 "acl {{name}{arg}...}", and optional args on acl condition
807 JH/05 Permit multiple router/transport headers_add/remove lines.
809 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
811 JH/07 Avoid using a waiting database for a single-message-only transport.
812 Performance patch from Paul Fisher. Bugzilla 1262.
814 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
817 JH/09 Add $headers_added variable, with content from use of ACL modifier
818 add_header (but not yet added to the message). Bugzilla 199.
820 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
821 Pulled from Bugzilla 817 by Wolfgang Breyha.
823 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
825 (nb: this is the same fix as in Exim 4.80.1)
827 JH/11 Add A= logging on delivery lines, and a client_set_id option on
830 JH/12 Add optional authenticated_sender logging to A= and a log_selector
833 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
835 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
836 advertise SMTP AUTH mechanism to us, instead of a generic
837 protocol violation error. Also, make Exim more robust to bad
838 data from the Dovecot auth socket.
840 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
842 When a queue runner is handling a message, Exim first routes the
843 recipient addresses, during which it prunes them based on the retry
844 hints database. After that it attempts to deliver the message to
845 any remaining recipients. It then updates the hints database using
848 So if a recipient address works intermittently, it can get repeatedly
849 deferred at routing time. The retry hints record remains fresh so the
850 address never reaches the final cutoff time.
852 This is a fairly common occurrence when a user is bumping up against
853 their storage quota. Exim had some logic in its local delivery code
854 to deal with this. However it did not apply to per-recipient defers
855 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
857 This change adds a proper retry rule check during routing so that the
858 final cutoff time is checked against the message's age. We only do
859 this check if there is an address retry record and there is not a
860 domain retry record; this implies that previous attempts to handle
861 the address had the retry_use_local_parts option turned on. We use
862 this as an approximation for the destination being like a local
863 delivery, as in LMTP.
865 I suspect this new check makes the old local delivery cutoff check
866 redundant, but I have not verified this so I left the code in place.
868 TF/02 Correct gecos expansion when From: is a prefix of the username.
870 Test 0254 submits a message to Exim with the header
874 When I ran the test suite under the user fanf2, Exim expanded
875 the header to contain my full name, whereas it should have added
876 a Resent-Sender: header. It erroneously treats any prefix of the
877 username as equal to the username.
879 This change corrects that bug.
881 GF/01 DCC debug and logging tidyup
882 Error conditions log to paniclog rather than rejectlog.
883 Debug lines prefixed by "DCC: " to remove any ambiguity.
885 TF/03 Avoid unnecessary rebuilds of lookup-related code.
887 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
888 Bug spotted by Jeremy Harris; was flawed since initial commit.
889 Would have resulted in OCSP responses post-SNI triggering an Exim
890 NULL dereference and crash.
892 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
894 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
895 Bug detection, analysis and fix by Samuel Thibault.
896 Bugzilla 1331, Debian bug #698092.
898 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
900 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
901 Server implementation by Todd Lyons, client by JH.
902 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
903 config variable "prdr_enable" controls whether the server
904 advertises the facility. If the client requests PRDR a new
905 acl_data_smtp_prdr ACL is called once for each recipient, after
906 the body content is received and before the acl_smtp_data ACL.
907 The client is controlled by bolth of: a hosts_try_prdr option
908 on the smtp transport, and the server advertisement.
909 Default client logging of deliveries and rejections involving
910 PRDR are flagged with the string "PRDR".
912 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
913 fclose(). Diagnosis by Todd Lyons.
915 PP/17 Update configure.default to handle IPv6 localhost better.
916 Patch by Alain Williams (plus minor tweaks).
919 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
920 This is now consistent with GnuTLS, and is now documented: the
921 previous undocumented portable approach to treating the option as
922 unset was to force an expansion failure. That still works, and
923 an empty string is now equivalent.
925 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
926 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
927 not performing validation itself.
929 PP/20 Added force_command boolean option to pipe transport.
930 Patch from Nick Koston, of cPanel Inc.
932 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
935 TF/04 Added udpsend ACL modifer and hexquote expansion operator
937 PP/21 Fix eximon continuous updating with timestamped log-files.
938 Broken in a format-string cleanup in 4.80, missed when I repaired the
939 other false fix of the same issue.
940 Report and fix from Heiko Schlichting.
943 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
944 Report from Prashanth Katuri.
946 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
947 It's SecureTransport, so affects any MacOS clients which use the
948 system-integrated TLS libraries, including email clients.
950 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
951 using a MIME ACL for non-SMTP local injection.
952 Report and assistance in diagnosis by Warren Baker.
954 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
956 JH/16 Fix comparisons for 64b. Bugzilla 1385.
958 TL/09 Add expansion variable $authenticated_fail_id to keep track of
959 last id that failed so it may be referenced in subsequent ACL's.
961 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
964 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
965 ldap library initialization, allowing self-signed CA's to be
966 used. Also properly sets require_cert option later in code by
967 using NULL (global ldap config) instead of ldap handle (per
968 session). Bug diagnosis and testing by alxgomz.
970 TL/12 Enhanced documentation in the ratelimit.pl script provided in
971 the src/util/ subdirectory.
973 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
974 renamed to Transport Post Delivery Action by Jeremy Harris, as
977 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
978 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
979 redis_servers = needs to be configured which will be used by the redis
980 lookup. Patch from Warren Baker, of The Packet Hub.
982 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
984 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
985 hostname or reverse DNS when processing a host list. Used suggestions
986 from multiple comments on this bug.
988 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
990 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
991 Missed a few lines, added it to make the runtest require no keyboard
994 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
995 contains upper case chars. Make router use caseful_local_part.
997 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
998 support when GnuTLS has been built with p11-kit.
1004 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1006 This, or similar/improved, will also be change PP/11 of 4.82.
1012 PP/01 Handle short writes when writing local log-files.
1013 In practice, only affects FreeBSD (8 onwards).
1014 Bugzilla 1053, with thanks to Dmitry Isaikin.
1016 NM/01 Bugzilla 949 - Documentation tweak
1018 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1021 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1023 PP/02 Implemented gsasl authenticator.
1025 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1027 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1028 `pkg-config foo` for cflags/libs.
1030 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1031 with rest of GSASL and with heimdal_gssapi.
1033 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1034 `pkg-config foo` for cflags/libs for the TLS implementation.
1036 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1037 properties get this fed in as external SSF. A number of robustness
1038 and debugging improvements to the cyrus_sasl authenticator.
1040 PP/08 cyrus_sasl server now expands the server_realm option.
1042 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1043 Patch by Jeremy Harris.
1045 PP/10 Added dbmjz lookup type.
1047 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1049 PP/12 MAIL args handles TAB as well as SP, for better interop with
1050 non-compliant senders.
1051 Analysis and variant patch by Todd Lyons.
1053 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1054 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1055 Patch from Dirk Mueller <dmueller@suse.com>
1057 PP/13 tls_peerdn now print-escaped for spool files.
1058 Observed some $tls_peerdn in wild which contained \n, which resulted
1059 in spool file corruption.
1061 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1062 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1063 or write after TLS renegotiation, which otherwise led to messages
1066 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1067 as a tracking header (ie: a signed header comes before the signature).
1068 Patch from Wolfgang Breyha.
1070 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1071 comma-sep list; embedded commas doubled.
1073 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1075 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1077 Report and patch from Dmitry Banschikov.
1079 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
1080 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1081 failures. We appear to now support TLS1.1+ with Exim.
1083 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1084 lets Exim select keys and certificates based upon TLS SNI from client.
1085 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1086 before an outbound SMTP session. New log_selector, +tls_sni.
1088 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1089 NULL dereference. Report and patch from Alun Jones.
1091 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1092 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1093 Not seeing resolver debug output on NetBSD, but suspect this is a
1094 resolver implementation change.
1096 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1097 Left warnings. Added "eximon gdb" invocation mode.
1099 PP/21 Defaulting "accept_8bitmime" to true, not false.
1101 PP/22 Added -bw for inetd wait mode support.
1103 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1104 locate the relevant includes and libraries. Made this the default.
1106 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1107 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1109 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1110 This may cause build issues on older platforms.
1112 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1113 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1114 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1115 Added SNI support via GnuTLS too.
1116 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1118 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1120 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1121 Applied second patch from Janne, implementing suggestion to default
1122 multiple-strings-in-record handling to match SPF spec.
1124 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1126 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1127 read-only, out of scope).
1128 Patch from Wolfgang Breyha, report from Stuart Northfield.
1130 PP/29 Fix three issues highlighted by clang analyser static analysis.
1131 Only crash-plausible issue would require the Cambridge-specific
1132 iplookup router and a misconfiguration.
1133 Report from Marcin Mirosław.
1135 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1137 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1138 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1139 As part of this, removing so much warning spew let me fix some minor
1140 real issues in debug logging.
1142 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1143 assignment on my part. Fixed.
1145 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1146 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1147 Janne Snabb (who went above and beyond: thank you).
1149 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1150 string otherwise requires a connection and a bunch more work and it's
1151 relatively easy to get wrong. Should also expose TLS library linkage
1154 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1155 64-bit ${eval} (JH/03).
1157 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1158 GNU libc to support some of the 64-bit stuff, should not lead to
1159 conflicts. Defined before os.h is pulled in, so if a given platform
1160 needs to override this, it can.
1162 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1163 protection layer was required, which is not implemented.
1164 Bugzilla 1254, patch from Wolfgang Breyha.
1166 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1167 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1168 tls_dhparam take prime identifiers. Also unbreak combination of
1169 OpenSSL+DH_params+TLSSNI.
1171 PP/39 Disable SSLv2 by default in OpenSSL support.
1177 PP/01 Solaris build fix for Oracle's LDAP libraries.
1178 Bugzilla 1109, patch from Stephen Usher.
1180 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1182 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1185 TF/02 Fix a couple more cases where we did not log the error message
1186 when unlink() failed. See also change 4.74-TF/03.
1188 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1189 lock up or crash if it happened to be inside a call to libc when it
1190 got a SIGUSR1 from exiwhat.
1192 The SIGUSR1 handler appends the current process status to the process
1193 log which is later printed by exiwhat. It used to use the general
1194 purpose logging code to do this, but several functions it calls are
1195 not safe for signals.
1197 The new output code in the SIGUSR1 handler is specific to the process
1198 log, and simple enough that it's easy to inspect for signal safety.
1199 Removing some special cases also simplifies the general logging code.
1200 Removing the spurious timestamps from the process log simplifies
1203 TF/04 Improved ratelimit ACL condition.
1205 The /noupdate option has been deprecated in favour of /readonly which
1206 has clearer semantics. The /leaky, /strict, and /readonly update modes
1207 are mutually exclusive. The update mode is no longer included in the
1208 database key; it just determines when the database is updated. (This
1209 means that when you upgrde Exim will forget old rate measurements.)
1211 Exim now checks that the per_* options are used with an update mode that
1212 makes sense for the current ACL. For example, when Exim is processing a
1213 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1214 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1215 must specify per_mail/readonly. If you omit the update mode it defaults to
1216 /leaky where that makes sense (as before) or /readonly where required.
1218 The /noupdate option is now undocumented but still supported for
1219 backwards compatibility. It is equivalent to /readonly except that in
1220 ACLs where /readonly is required you may specify /leaky/noupdate or
1221 /strict/noupdate which are treated the same as /readonly.
1223 A useful new feature is the /count= option. This is a generalization
1224 of the per_byte option, so that you can measure the throughput of other
1225 aggregate values. For example, the per_byte option is now equivalent
1226 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1228 The per_rcpt option has been generalized using the /count= mechanism
1229 (though it's more complicated than the per_byte equivalence). When it is
1230 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1231 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1232 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1233 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1234 Note that using per_rcpt with a non-readonly update mode in more than
1235 one ACL will cause the recipients to be double-counted. (The per_mail
1236 and per_byte options don't have this problem.)
1238 The handling of very low rates has changed slightly. If the computed rate
1239 is less than the event's count (usually one) then this event is the first
1240 after a long gap. In this case the rate is set to the same as this event's
1241 count, so that the first message of a spam run is counted properly.
1243 The major new feature is a mechanism for counting the rate of unique
1244 events. The new per_addr option counts the number of different
1245 recipients that someone has sent messages to in the last time period. It
1246 behaves like per_rcpt if all the recipient addresses are different, but
1247 duplicate recipient addresses do not increase the measured rate. Like
1248 the /count= option this is a general mechanism, so the per_addr option
1249 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1250 example, measure the rate that a client uses different sender addresses
1251 with the options per_mail/unique=$sender_address. There are further
1252 details in the main documentation.
1254 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1256 TF/06 Removed a few PCRE remnants.
1258 TF/07 Automatically extract Exim's version number from tags in the git
1259 repository when doing development or release builds.
1261 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1262 Bugzilla 879. Patch from Paul Fisher.
1264 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1265 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1268 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1270 PP/05 Variable $av_failed, true if the AV scanner deferred.
1271 Bugzilla 1078. Patch from John Horne.
1273 PP/06 Stop make process more reliably on build failure.
1274 Bugzilla 1087. Patch from Heiko Schlittermann.
1276 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1277 Bugzilla 1089. Patch from Heiko Schlittermann.
1279 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1280 Bugzilla 1131. Patch from Holger Weiß.
1282 PP/09 Handle IPv6 addresses with SPF.
1283 Bugzilla 860. Patch from Wolfgang Breyha.
1285 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1287 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1290 PP/11 match_* no longer expand right-hand-side by default.
1291 New compile-time build option, EXPAND_LISTMATCH_RHS.
1292 New expansion conditions, "inlist", "inlisti".
1294 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1296 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1298 PP/14 fix log_write() format string regression from TF/03.
1299 Bugzilla 1152. Patch from Dmitry Isaikin.
1305 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1307 PP/02 Harmonised TLS library version reporting; only show if debugging.
1308 Layout now matches that introduced for other libraries in 4.74 PP/03.
1310 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1312 PP/04 New "dns_use_edns0" global option.
1314 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1317 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1318 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1320 TK/01 Updated PolarSSL code to 0.14.2.
1321 Bugzilla 1097. Patch from Andreas Metzler.
1323 PP/07 Catch divide-by-zero in ${eval:...}.
1324 Fixes bugzilla 1102.
1326 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1329 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1330 format-string attack -- SECURITY: remote arbitrary code execution.
1332 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1333 time unintentionally subject to list matching rules, letting the header
1334 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1335 arbitrary string expansion). This allowed for information disclosure.
1337 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1338 INT_MIN/-1 -- value coerced to INT_MAX.
1344 NM/01 Workround for PCRE version dependency in version reporting
1347 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1348 This fixes portability to compilers other than gcc, notably
1349 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1351 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1352 makefiles for portability to HP-UX and POSIX correctness.
1354 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1355 Also via indented variable definition in the Makefile.
1356 (Debugging by Oliver Heesakkers).
1358 PP/02 Restore caching of spamd results with expanded spamd_address.
1359 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1361 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1362 Improves build reliability. Fix from: Frank Elsner
1364 NM/02 Fix wide character breakage in the rfc2047 coding
1365 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1367 NM/03 Allow underscore in dnslist lookups
1368 Fixes bug 1026. Patch from Graeme Fowler
1370 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1371 Code patches from Adam Ciarcinski of NetBSD.
1373 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1376 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1377 is logged, to avoid truncation. Patch from John Horne.
1379 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1380 Patch from Jakob Hirsch.
1382 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1383 SQL string expansion failure details.
1384 Patch from Andrey Oktyabrski.
1386 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1387 Patch from Simon Arlott.
1389 PP/09 New lookups functionality failed to compile on old gcc which rejects
1390 extern declarations in function scope.
1391 Patch from Oliver Fleischmann
1393 PP/10 Use sig_atomic_t for flags set from signal handlers.
1394 Check getgroups() return and improve debugging.
1395 Fixed developed for diagnosis in bug 927 (which turned out to be
1398 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1399 Patch from Mark Zealey.
1401 PP/12 Bugzilla 1056: Improved spamd server selection.
1402 Patch from Mark Zealey.
1404 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1405 Based on patch from Heiko Schlittermann.
1407 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1408 Patch from Uwe Doering, sign-off by Michael Haardt.
1410 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1411 variable declaration deep within a block. Bug and patch from
1414 PP/15 lookups-Makefile IRIX compatibilty coercion.
1416 PP/16 Make DISABLE_DKIM build knob functional.
1418 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1419 Patch by Simon Arlott
1421 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1422 variable argument macros. Our copy now differs from upstream.
1428 TF/01 Failure to get a lock on a hints database can have serious
1429 consequences so log it to the panic log.
1431 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1432 controlled using the smtp_confirmation log selector.
1434 TF/03 Include the error message when we fail to unlink a spool file.
1436 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1437 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1438 for maintaining out-of-tree patches for some time.
1440 PP/01 Bugzilla 139: Documentation and portability issues.
1441 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1442 Handle per-OS dynamic-module compilation flags.
1444 PP/02 Let /dev/null have normal permissions.
1445 The 4.73 fixes were a little too stringent and complained about the
1446 permissions on /dev/null. Exempt it from some checks.
1447 Reported by Andreas M. Kirchwitz.
1449 PP/03 Report version information for many libraries, including
1450 Exim version information for dynamically loaded libraries. Created
1451 version.h, now support a version extension string for distributors
1452 who patch heavily. Dynamic module ABI change.
1454 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1455 privilege escalation vulnerability whereby the Exim run-time user
1456 can cause root to append content of the attacker's choosing to
1459 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1462 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1463 If dropping privileges for untrusted macros, we disabled normal logging
1464 on the basis that it would fail; for the Exim run-time user, this is not
1465 the case, and it resulted in successful deliveries going unlogged.
1466 Fixed. Reported by Andreas Metzler.
1472 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1473 only prepend for the Resent-* case. Fixes regression introduced in
1474 Exim 4.70 by NM/22 for Bugzilla 607.
1476 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1477 increasing numbers of administrators be bitten by this.
1479 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1481 PP/03 Bugzilla 994: added openssl_options main configuration option.
1483 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1485 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1487 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1489 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1490 without a peer certificate, leading to a segfault because of an
1491 assumption that peers always have certificates. Be a little more
1492 paranoid. Problem reported by Martin Tscholak.
1494 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1495 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1496 NB: ClamAV planning to remove STREAM in "middle of 2010".
1497 CL also introduces -bmalware, various -d+acl logging additions and
1498 more caution in buffer sizes.
1500 PP/09 Implemented reverse_ip expansion operator.
1502 PP/10 Bugzilla 937: provide a "debug" ACL control.
1504 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1506 PP/12 Bugzilla 973: Implement --version.
1508 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1510 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1512 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1514 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1515 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1516 ignore trailing whitespace.
1518 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1520 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1523 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1524 Notification from Dr Andrew Aitchison.
1526 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1527 ExtendedDetectionInfo response format.
1528 Notification from John Horne.
1530 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1533 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1534 XSL and documented dependency on system catalogs, with examples of how
1537 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1540 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1541 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1542 configuration file which is writeable by the Exim user or group.
1544 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1545 of configuration files to cover files specified with the -C option if
1546 they are going to be used with root privileges, not just the default
1549 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1550 option (effectively making it always true).
1552 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1553 files to be used while preserving root privileges.
1555 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1556 that rogue child processes cannot use them.
1558 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1559 run-time user, instead of root.
1561 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1562 Exim run-time user without dropping privileges.
1564 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1565 result string, instead of calling string_vformat() twice with the same
1568 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1569 for other users. Others should always drop root privileges if they use
1570 -C on the command line, even for a whitelisted configure file.
1572 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1574 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1580 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1581 $data_path, and $header_path variables; fixed documentation bugs and
1584 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1585 exipick to access non-standard spools, including the "frozen" queue
1588 NM/01 Bugzilla 965: Support mysql stored procedures.
1589 Patch from Alain Williams
1591 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1593 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1594 Patch from Andreas Metzler
1596 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1597 Patch from Kirill Miazine
1599 NM/05 Bugzilla 671: Added umask to procmail example.
1601 JJ/03 installed exipick 20100323.0, fixing doc bug
1603 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1604 directory. Notification and patch from Dan Rosenberg.
1606 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1608 TK/02 Improve log output when DKIM signing operation fails.
1610 MH/01 Treat the transport option dkim_domain as a colon separated
1611 list, not as a single string, and sign the message with each element,
1612 omitting multiple occurences of the same signer.
1614 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1615 Bugzilla 985, 986. Patch by Simon Arlott
1617 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1618 Patch by Simon Arlott
1620 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1621 MBX locking. Notification from Dan Rosenberg.
1627 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1629 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1631 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1633 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1635 NM/04 Bugzilla 915: Flag broken perl installation during build.
1641 TK/01 Added patch by Johannes Berg that expands the main option
1642 "spamd_address" if it starts with a dollar sign.
1644 TK/02 Write list of recipients to X-Envelope-Sender header when building
1645 the mbox-format spool file for content scanning (suggested by Jakob
1648 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1649 (http://www.dcc-servers.net/) support via dccifd. Activated by
1650 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1652 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1653 by Mark Daniel Reidel <mr@df.eu>.
1655 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1656 When building exim an external PCRE library is now needed -
1657 PCRE is a system library on the majority of modern systems.
1658 See entry on PCRE_LIBS in EDITME file.
1660 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1661 conversation. Added nologin parameter to request.
1662 Patch contributed by Kirill Miazine.
1664 TF/01 Do not log submission mode rewrites if they do not change the address.
1666 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1668 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1669 log files in place. Contributed by Roberto Lima.
1671 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1673 TF/03 Bugzilla 615: When checking the local_parts router precondition
1674 after a local_part_suffix or local_part_prefix option, Exim now
1675 does not use the address's named list lookup cache, since this
1676 contains cached lookups for the whole local part.
1678 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1679 Robert Millan. Documentation is in experimental-spec.txt.
1681 TF/04 Bugzilla 668: Fix parallel build (make -j).
1683 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1685 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1686 Patch provided by Jan Srzednicki.
1688 TF/05 Leading white space used to be stripped from $spam_report which
1689 wrecked the formatting. Now it is preserved.
1691 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1692 that they are available at delivery time.
1694 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1696 TF/08 TLS error reporting now respects the incoming_interface and
1697 incoming_port log selectors.
1699 TF/09 Produce a more useful error message if an SMTP transport's hosts
1700 setting expands to an empty string.
1702 NM/06 Bugzilla 744: EXPN did not work under TLS.
1703 Patch provided by Phil Pennock.
1705 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1706 Patch provided by Richard Godbee.
1708 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1709 acl_smtp_notquit, added index entry.
1711 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1712 Patch provided by Eugene Bujak.
1714 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1715 accept(). Patch provided by Maxim Dounin.
1717 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1718 Patch provided by Phil Pennock.
1720 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1722 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1723 Patch provided by Brad "anomie" Jorsch.
1725 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1726 Patch provided by Dean Brooks.
1728 TK/05 Add native DKIM support (does not depend on external libraries).
1730 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1731 Patch provided by Graeme Fowler.
1733 NM/16 Bugzilla 851: Documentation example syntax fix.
1735 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1737 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1740 NM/19 Bugzilla 745: TLS version reporting.
1741 Patch provided by Phil Pennock.
1743 NM/20 Bugzilla 167: bool: condition support.
1744 Patch provided by Phil Pennock.
1746 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1747 clients. Patch provided by Phil Pennock.
1749 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1750 Patch provided by Brad "anomie" Jorsch.
1752 NM/23 Bugzilla 687: Fix misparses in eximstats.
1753 Patch provided by Heiko Schlittermann.
1755 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1756 Patch provided by Heiko Schlittermann.
1758 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1759 plus update to original patch.
1761 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1763 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1764 Patch provided by David Brownlee.
1766 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1768 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1770 NM/30 Bugzilla 888: TLS documentation bugfixes.
1772 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1774 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1775 Unlike the original bugzilla I have changed all shell scripts in src tree.
1777 NM/33 Bugzilla 898: Transport filter timeout fix.
1778 Patch by Todd Rinaldo.
1780 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1781 Patch by Serge Demonchaux.
1783 NM/35 Bugzilla 39: Base64 decode bug fixes.
1784 Patch by Jakob Hirsch.
1786 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1788 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1790 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1792 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1798 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1799 ALT-N's libdkim that I have put here:
1800 http://duncanthrax.net/exim-experimental/
1802 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1803 were called 'true' and it seems that C99 defines that as a reserved
1804 keyword to be used with 'bool' variable types. That means you could
1805 not include C99-style headers which use bools without triggering
1806 build errors in sieve.c.
1808 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1809 as mailq or other aliases. Changed the --help handling significantly
1810 to do whats expected. exim_usage() emits usage/help information.
1812 SC/01 Added the -bylocaldomain option to eximstats.
1814 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1816 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1818 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1824 PH/01 Another patch from the Sieve maintainer.
1826 PH/02 When an IPv6 address is converted to a string for single-key lookup
1827 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1828 dots are used instead of colons so that keys in lsearch files need not
1829 contain colons. This was done some time before quoting was made available
1830 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1831 (notated using the quote facility) so as to distinguish them from IPv4
1832 keys. This meant that lookups for IP addresses in host lists did not work
1833 for iplsearch lookups.
1835 This has been fixed by arranging for IPv6 addresses to be expressed with
1836 colons if the lookup type is iplsearch. This is not incompatible, because
1837 previously such lookups could never work.
1839 The situation is now rather anomolous, since one *can* have colons in
1840 ordinary lsearch keys. However, making the change in all cases is
1841 incompatible and would probably break a number of configurations.
1843 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1846 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1847 conversion specification without a maximum field width, thereby enabling
1848 a rogue spamd server to cause a buffer overflow. While nobody in their
1849 right mind would setup Exim to query an untrusted spamd server, an
1850 attacker that gains access to a server running spamd could potentially
1851 exploit this vulnerability to run arbitrary code as the Exim user.
1853 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1854 $primary_hostname instead of what libspf2 thinks the hosts name is.
1856 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1857 a directory entry by the name of the lookup key. Previously, if a
1858 symlink pointed to a non-existing file or a file in a directory that
1859 Exim lacked permissions to read, a lookup for a key matching that
1860 symlink would fail. Now it is enough that a matching directory entry
1861 exists, symlink or not. (Bugzilla 503.)
1863 PH/03 The body_linecount and body_zerocount variables are now exported in the
1866 PH/04 Added the $dnslist_matched variable.
1868 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1869 This means they are set thereafter only if the connection becomes
1872 PH/06 Added the client_condition to authenticators so that some can be skipped
1873 by clients under certain conditions.
1875 PH/07 The error message for a badly-placed control=no_multiline_responses left
1876 "_responses" off the end of the name.
1878 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1880 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1881 (without spaces) instead of just copying the configuration text.
1883 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1885 PH/11 Added $max_received_linelength.
1887 PH/12 Added +ignore_defer and +include_defer to host lists.
1889 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1890 way in which PCRE > 7.0 is built.
1892 PH/14 Implemented queue_only_load_latch.
1894 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1895 MAIL command. The effect was to mangle the value on 64-bit systems.
1897 PH/16 Another patch from the Sieve maintainer.
1899 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1901 PH/18 If a system quota error occurred while trying to create the file for
1902 a maildir delivery, the message "Mailbox is full" was not appended to the
1903 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1904 only to a quota excession during the actual writing of the file.
1906 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1907 characters?) which causes problems in log lines. The DN values are now
1908 passed through string_printing() before being added to log lines.
1910 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1911 and InterBase are left for another time.)
1913 PH/21 Added message_body_newlines option.
1915 PH/22 Guard against possible overflow in moan_check_errorcopy().
1917 PH/23 POSIX allows open() to be a macro; guard against that.
1919 PH/24 If the recipient of an error message contained an @ in the local part
1920 (suitably quoted, of course), incorrect values were put in $domain and
1921 $local_part during the evaluation of errors_copy.
1927 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1928 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1931 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1932 issue a MAIL command.
1934 PH/02 In an ACL statement such as
1936 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1938 if a client was not listed at all, or was listed with a value other than
1939 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1940 the condition was not true (as it should be), so access was not denied.
1941 The bug was that the ! inversion was incorrectly passed on to the second
1942 item. This has been fixed.
1944 PH/03 Added additional dnslists conditions == and =& which are different from
1945 = and & when the dns lookup returns more than one IP address.
1947 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1948 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1950 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1951 FSYNC, which compiles an option called disable_fsync that allows for
1952 bypassing fsync(). The documentation is heavily laced with warnings.
1954 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1956 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1957 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1958 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1959 including adding "make clean"; (3) Added -fPIC when compiling the test
1960 dynamically loaded module, to get rid of a warning.
1962 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1963 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1964 = 0s. The bug is otherwise harmless.
1966 PH/07 There was a bug in the dovecot authenticator such that the value of
1967 $auth1 could be overwritten, and so not correctly preserved, after a
1968 successful authentication. This usually meant that the value preserved by
1969 the server_setid option was incorrect.
1971 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1973 PH/09 Installed PCRE release 7.0.
1975 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1976 run for batched SMTP input. It is now run at the start of every message
1977 in the batch. While fixing this I discovered that the process information
1978 (output by running exiwhat) was not always getting set for -bs and -bS
1979 input. This is fixed, and it now also says "batched" for BSMTP.
1981 PH/11 Added control=no_pipelining.
1983 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1984 patch, slightly modified), and move the expansion of helo_data till after
1985 the connection is made in the smtp transport (so it can use these
1988 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1990 PH/14 Added log_selector = +pid.
1992 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1994 PH/16 Add ${if forany and ${if forall.
1996 PH/17 Added dsn_from option to vary the From: line in DSNs.
1998 PH/18 Flush SMTP output before performing a callout, unless control =
1999 no_callout_flush is set.
2001 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2002 was true (the default) a successful delivery failed to delete the retry
2003 item, thus causing premature timeout of the address. The bug is now
2006 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2008 PH/21 Long custom messages for fakedefer and fakereject are now split up
2009 into multiline reponses in the same way that messages for "deny" and
2010 other ACL rejections are.
2012 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2013 with slight modification.
2015 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2016 draft, changing the syntax and factoring some duplicate code".
2018 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2019 for deliveries of the second and subsequent messages over the same SMTP
2022 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2023 ${reduce, with only minor "tidies".
2025 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2027 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2028 expansion side effects.
2030 PH/27 When a message times out after an over-quota error from an Exim-imposed
2031 quota, the bounce message says "mailbox is full". This message was not
2032 being given when it was a system quota that was exceeded. It now should
2035 MH/03 Made $recipients available in local_scan(). local_scan() already has
2036 better access to the recipient list through recipients_list[], but
2037 $recipients can be useful in postmaster-provided expansion strings.
2039 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2040 in the case of a MAIL command with additional options following the
2041 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2042 were accidentally chopped off.
2044 PH/29 SMTP synchronization checks are implemented when a command is read -
2045 there is a check that no more input is waiting when there shouldn't be
2046 any. However, for some commands, a delay in an ACL can mean that it is
2047 some time before the response is written. In this time, more input might
2048 arrive, invalidly. So now there are extra checks after an ACL has run for
2049 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2050 pipelining has not been advertised.
2052 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2054 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2055 returned in the SMTP response when smtp_return_error_details was false.
2056 This has been fixed.
2058 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2059 instead of the C I/O that was originally supplied, because problems were
2060 reported on Solaris.
2062 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2063 Exim which did not show up earlier: it was assuming that a call to
2064 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2065 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2066 was a macro that became an assignment, so it seemed to work. This has
2067 changed to a proper function call with a void return, hence the compile
2068 error. Exim's code has been fixed.
2070 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2073 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2075 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2077 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2078 because it turns out to be too big or there is a timeout) there is no
2079 "Completed" line in the log. When some messages of this type were
2080 selected by exigrep, they were listed as "not completed". Others were
2081 picked up by some special patterns. I have improved the selection
2082 criteria to be more general.
2084 PH/38 The host_find_failed option in the manualroute router can now be set
2085 to "ignore", to completely ignore a host whose IP address cannot be
2086 found. If all hosts are ignored, the behaviour is controlled by the new
2087 host_all_ignored option.
2089 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2090 homing or because of multiple MX records with /mx) generated more than
2091 one IP address, and the following item turned out to be the local host,
2092 all the secondary addresses of the first item were incorrectly removed
2093 from the list, along with the local host and any following hosts (which
2094 is what is supposed to happen).
2096 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2097 whoever called Exim into the -H file. In the case of the daemon it was
2098 behaving confusingly. When first started, it used values for whoever
2099 started the daemon, but after a SIGHUP it used the Exim user (because it
2100 calls itself on a restart). I have changed the code so that it now always
2103 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2104 message are rejected with the same error (e.g. no authentication or bad
2105 sender address), and a DATA command is nevertheless sent (as can happen
2106 with PIPELINING or a stupid MUA), the error message that was given to the
2107 RCPT commands is included in the rejection of the DATA command. This is
2108 intended to be helpful for MUAs that show only the final error to their
2111 PH/42 Another patch from the Sieve maintainer.
2113 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2114 Eximstats - Fixed some broken HTML links and added missing column headers
2116 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2117 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2119 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2121 PH/43 Yet another patch from the Sieve maintainer.
2123 PH/44 I found a way to check for a TCP/IP connection going away before sending
2124 the response to the final '.' that terminates a message, but only in the
2125 case where the client has not sent further data following the '.'
2126 (unfortunately, this is allowed). However, in many cases there won't be
2127 any further data because there won't be any more messages to send. A call
2128 to select() can be used: if it shows that the input is "ready", there is
2129 either input waiting, or the socket has been closed. An attempt to read
2130 the next input character can distinguish the two cases. Previously, Exim
2131 would have sent an OK response which the client would never have see.
2132 This could lead to message repetition. This fix should cure that, at
2133 least in a lot of common cases.
2135 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2136 advertised in response to EHLO.
2142 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2143 fixed by 4.65/MH/01 (is this a record?) are fixed:
2145 (i) An empty string was always treated as zero by the numeric comparison
2146 operators. This behaviour has been restored.
2148 (ii) It is documented that the numeric comparison operators always treat
2149 their arguments as decimal numbers. This was broken in that numbers
2150 starting with 0 were being interpreted as octal.
2152 While fixing these problems I realized that there was another issue that
2153 hadn't been noticed. Values of message_size_limit (both the global option
2154 and the transport option) were treated as octal if they started with 0.
2155 The documentation was vague. These values are now always treated as
2156 decimal, and I will make that clear in the documentation.
2162 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2163 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2166 MH/01 Don't check that the operands of numeric comparison operators are
2167 integers when their expansion is in "skipping" mode (fixes bug
2168 introduced by 4.64-PH/07).
2170 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2171 child addresses, Exim now panics and dies. Previously, because the count
2172 is held in a short int, deliveries were likely to be lost. As such a
2173 large number of recipients for a single message is ridiculous
2174 (performance will be very, very poor), I have chosen to impose a limit
2175 rather than extend the field.
2181 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2182 leftover -K file (the existence of which was triggered by #402).
2183 While we were at it, introduced process PID as part of the -K
2184 filename. This should rule out race conditions when creating
2187 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2188 processing considerably. Previous code took too long for large mails,
2189 triggering a timeout which in turn triggers #401.
2191 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2192 in the DK code in transports.c. sendfile() is not really portable,
2193 hence the _LINUX specificness.
2195 TF/01 In the add_headers option to the mail command in an Exim filter,
2196 there was a bug that Exim would claim a syntax error in any
2197 header after the first one which had an odd number of characters
2200 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2201 callout verification, Exim cached a "reject" for the entire domain. This
2202 is correct for most verifications, but it is not correct for a recipient
2203 verification with use_sender or use_postmaster set, because in that case
2204 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2205 case of MAIL FROM:<> rejection from other early rejections (e.g.
2206 rejection of HELO). When verifying a recipient using a non-null MAIL
2207 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2208 Whatever the result of the callout, the value of the domain cache is
2209 left unchanged (for any other kind of callout, getting as far as trying
2210 RCPT means that the domain itself is ok).
2212 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2215 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2216 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2217 session, the daemon ignores ECONNECT errors and logs others; it now
2218 ignores EPIPE as well.
2220 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2221 (quoted-printable decoding).
2223 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2224 later the small subsequent patch to fix an introduced bug.
2226 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2228 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2230 PH/08 An error is now given if message_size_limit is specified negative.
2232 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2233 to be given (somewhat) arbitrary names.
2235 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2238 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2239 miscellaneous code fixes
2241 PH/10 Added the log_reject_target ACL modifier to specify where to log
2244 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2245 hostname. This is wrong, because it relates to the incoming message (and
2246 probably the interface on which it is arriving) and not to the outgoing
2247 callout (which could be using a different interface). This has been
2248 changed to use the value of the helo_data option from the smtp transport
2249 instead - this is what is used when a message is actually being sent. If
2250 there is no remote transport (possible with a router that sets up host
2251 addresses), $smtp_active_hostname is used.
2253 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2254 tweaks were necessary in order to get it to work (see also 21 below):
2255 (a) The code assumed that strncpy() returns a negative number on buffer
2256 overflow, which isn't the case. Replaced with Exim's string_format()
2258 (b) There were several signed/unsigned issues. I just did the minimum
2259 hacking in of casts. There is scope for a larger refactoring.
2260 (c) The code used strcasecmp() which is not a standard C function.
2261 Replaced with Exim's strcmpic() function.
2262 (d) The code set only $1; it now sets $auth1 as well.
2263 (e) A simple test gave the error "authentication client didn't specify
2264 service in request". It would seem that Dovecot has changed its
2265 interface. Fortunately there's a specification; I followed it and
2266 changed what the client sends and it appears to be working now.
2268 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2271 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2272 address A is aliased to B and C, where B exists and C does not. Without
2273 -v the output is "A verified" because verification stops after a
2274 successful redirection if more than one address is generated. However,
2275 with -v the child addresses are also verified. Exim was outputting "A
2276 failed to verify" and then showing the successful verification for C,
2277 with its parentage. It now outputs "B failed to verify", showing B's
2278 parentage before showing the successful verification of C.
2280 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2281 look up a TXT record in a specific list after matching in a combined
2284 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2285 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2286 they consult the DNS. I had assumed they would set it the way they
2287 wanted; and indeed my experiments on Linux seem to show that in some
2288 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2289 To be on the safe side, however, I have now made the interface to
2290 host_find_byname() similar to host_find_bydns(), with an argument
2291 containing the DNS resolver options. The host_find_byname() function now
2292 sets these options at its start, just as host_find_bydns() does. The smtp
2293 transport options dns_qualify_single and dns_search_parents are passed to
2294 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2295 of host_find_byname() use the default settings of RES_DEFNAMES
2296 (qualify_single) but not RES_DNSRCH (search_parents).
2298 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2299 spool_read_header() do less string testing, by means of a preliminary
2300 switch on the second character of optional "-foo" lines. (This is
2301 overdue, caused by the large number of possibilities that now exist.
2302 Originally there were few.) While I was there, I also converted the
2303 str(n)cmp tests so they don't re-test the leading "-" and the first
2304 character, in the hope this might squeeze out yet more improvement.
2306 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2307 flag allowing group syntax was set by the header_syntax check but not
2308 turned off, possible causing trouble later; (2) The flag was not being
2309 set at all for the header_verify test, causing "group"-style headers to
2310 be rejected. I have now set it in this case, and also caused header_
2311 verify to ignore an empty address taken from a group. While doing this, I
2312 came across some other cases where the code for allowing group syntax
2313 while scanning a header line wasn't quite right (mostly, not resetting
2314 the flag correctly in the right place). These bugs could have caused
2315 trouble for malformed header lines. I hope it is now all correct.
2317 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2318 with the "reply" argument non-NULL. The code, however (which originally
2319 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2320 but it didn't always do it. This confused somebody who was copying the
2321 code for some other use. I have removed all the tests.
2323 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2324 feature that was used to support insecure browsers during the U.S. crypto
2325 embargo. It requires special client support, and Exim is probably the
2326 only MTA that supported it -- and would never use it because real RSA is
2327 always available. This code has been removed, because it had the bad
2328 effect of slowing Exim down by computing (never used) parameters for the
2329 RSA_EXPORT functionality.
2331 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2332 authenticator to fail if there's a tab character in the incoming data
2333 (there should never be unless someone is messing about, as it's supposed
2334 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2335 if the connection is using TLS or if the remote IP is the same as the
2336 local IP, and the "valid-client-cert option" if a client certificate has
2339 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2340 authenticators. This can be used for authorization after authentication
2341 succeeds. (In the case of plaintext, it servers for both authentication
2344 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2345 if any retry times were supplied.
2347 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2348 connection, where there is no client IP address to check. In this
2349 situation, the verify now always succeeds.
2351 PH/25 Applied John Jetmore's -Mset patch.
2353 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2355 PH/27 In a string expansion for a processed (not raw) header when multiple
2356 headers of the same name were present, leading whitespace was being
2357 removed from all of them, but trailing whitespace was being removed only
2358 from the last one. Now trailing whitespace is removed from each header
2359 before concatenation. Completely empty headers in a concatenation (as
2360 before) are ignored.
2362 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2363 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2365 PH/29 [Removed. This was a change that I later backed out, and forgot to
2366 correct the ChangeLog entry (that I had efficiently created) before
2367 committing the later change.]
2369 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2370 address errors (4xx response to RCPT) over the same connection as other
2371 messages routed to the same hosts. Such deliveries are always "forced",
2372 so retry times are not inspected. This resulted in far too many retries
2373 for the affected addresses. The effect occurred only when there were more
2374 hosts than the hosts_max_try setting in the smtp transport when it had
2375 the 4xx errors. Those hosts that it had tried were not added to the list
2376 of hosts for which the message was waiting, so if all were tried, there
2377 was no problem. Two fixes have been applied:
2379 (i) If there are any address or message errors in an SMTP delivery, none
2380 of the hosts (tried or untried) are now added to the list of hosts
2381 for which the message is waiting, so the message should not be a
2382 candidate for sending over the same connection that was used for a
2383 successful delivery of some other message. This seems entirely
2384 reasonable: after all the message is NOT "waiting for some host".
2385 This is so "obvious" that I'm not sure why it wasn't done
2386 previously. Hope I haven't missed anything, but it can't do any
2387 harm, as the worst effect is to miss an optimization.
2389 (ii) If, despite (i), such a delivery is accidentally attempted, the
2390 routing retry time is respected, so at least it doesn't keep
2391 hammering the server.
2393 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2394 in ${readsocket because some servers need this prod.
2396 PH/32 Added some extra debug output when updating a wait-xxx database.
2398 PH/33 The hint "could be header name not terminated by colon", which has been
2399 given for certain expansion errors for a long time, was not being given
2400 for the ${if def:h_colon_omitted{... case.
2402 PH/34 The spec says: "With one important exception, whenever a domain list is
2403 being scanned, $domain contains the subject domain." There was at least
2404 one case where this was not true.
2406 PH/35 The error "getsockname() failed: connection reset by peer" was being
2407 written to the panic log as well as the main log, but it isn't really
2408 panic-worthy as it just means the connection died rather early on. I have
2409 removed the panic log writing for the ECONNRESET error when getsockname()
2412 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2413 runs only) independently of the message's sender address. This meant
2414 that, if the 4xx error was in fact related to the sender, a different
2415 message to the same recipient with a different sender could confuse
2416 things. In particualar, this can happen when sending to a greylisting
2417 server, but other circumstances could also provoke similar problems.
2418 I have changed the default so that the retry time for these errors is now
2419 based a combination of the sender and recipient addresses. This change
2420 can be overridden by setting address_retry_include_sender=false in the
2423 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2424 remote server are returned as part of bounce messages. This was not
2425 happening for LMTP over a pipe (the lmtp transport), but now it is the
2426 same for both kinds of LMTP.
2428 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2429 in header lines that were in fact CNAMEs. This is no longer the case.
2431 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2432 and queue runs started by the daemon processed all messages. This has
2433 been fixed so that -R and -S can now usefully be given with -q<time>.
2435 PH/40 Import PCRE release 6.7 (fixes some bugs).
2437 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2439 PH/42 Give an error if -q is specified more than once.
2441 PH/43 Renamed the variables $interface_address and $interface_port as
2442 $received_ip_address and $received_port, to make it clear that these
2443 values apply to message reception, and not to the outgoing interface when
2444 a message is delivered. (The old names remain recognized, of course.)
2446 PH/44 There was no timeout on the connect() call when using a Unix domain
2447 socket in the ${readsocket expansion. There now is.
2449 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2450 be meaningful with "accept".
2452 SC/01 Eximstats V1.43
2453 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2455 SC/02 Eximstats V1.44
2456 Use a glob alias rather than an array ref in the generated
2457 parser. This improves both readability and performance.
2459 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2460 Collect SpamAssassin and rejection statistics.
2461 Don't display local sender or destination tables unless
2462 there is data to show.
2463 Added average volumes into the top table text output.
2465 SC/04 Eximstats V1.46
2466 Collect data on the number of addresses (recipients)
2467 as well as the number of messages.
2469 SC/05 Eximstats V1.47
2470 Added 'Message too big' to the list of mail rejection
2471 reasons (thanks to Marco Gaiarin).
2473 SC/06 Eximstats V1.48
2474 Mainlog lines which have GMT offsets and are too short to
2475 have a flag are now skipped.
2477 SC/07 Eximstats V1.49 (Alain Williams)
2478 Added the -emptyok flag.
2480 SC/08 Eximstats V1.50
2481 Fixes for obtaining the IP address from reject messages.
2483 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2484 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2485 whitesspace changes from 4.64-PH/27
2487 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2490 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2491 are found, allow negative numbers in numeric criteria)
2493 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2495 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2496 to match changes made in 4.64-PH/43
2498 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2500 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2501 "domain" is actually an IP address, and force a failure. This locks out
2502 those revolvers/nameservers that support "A-for-A" lookups, in
2503 contravention of the specifications.
2505 PH/48 When a host name was looked up from an IP address, and the subsequent
2506 forward lookup of the name timed out, the host name was left in
2507 $sender_host_name, contrary to the specification.
2509 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2510 restricted to single-key lookups, Exim was not diagnosing an error if
2511 * or *@ was used with a query-style lookup.
2513 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2515 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2516 long ago, but noone interested enough thought of it. Let's just say that
2517 the "1.1" means that there are some new functions that weren't there at
2518 some point in the past.
2520 PH/51 Error processing for expansion failure of helo_data from an smtp
2521 transport during callout processing was broken.
2523 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2524 tested/used via the -bh/-bhc/-bs options.
2526 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2527 bug, fixed in subsequent PCRE releases).
2529 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2530 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2532 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2538 SC/01 Use a glob alias rather than an array ref in eximstats generated
2539 parser. This improves both readability and performance.
2541 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2542 Don't display local sender or destination tables in eximstats unless
2543 there is data to show.
2544 Added average volumes into the eximstats top table text output.
2546 SC/03 Collect data on the number of addresses (recipients) as well
2547 as the number of messages in eximstats.
2549 TF/01 Correct an error in the documentation for the redirect router. Exim
2550 does (usually) call initgroups() when daemonizing.
2552 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2553 with consistent privilege compared to when running as a daemon.
2555 TF/03 Note in the spec that $authenticated_id is not set for local
2556 submissions from trusted users.
2558 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2559 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2561 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2562 by adding some example configuration directives to the default
2563 configuration file. A little bit of work is required to uncomment the
2564 directives and define how usernames and passwords are checked, but
2565 there is now a framework to start from.
2567 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2568 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2569 without this. I don't know how relevant this is to other LDAP libraries.
2571 PH/02 Add the verb name to the "unknown ACL verb" error.
2573 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2575 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2577 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2578 directory not expanded when it should be if an expanded home directory
2579 was set for the address (which is overridden by the transport).
2581 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2584 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2585 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2586 because it is too late at that time, and has no effect.
2588 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2589 security issue with \' (bugzilla #107). I could not use the
2590 PQescapeStringConn() function, because it needs a PGconn value as one of
2593 PH/08 When testing addresses using -bt, indicate those final addresses that
2594 are duplicates that would not cause an additional delivery. At least one
2595 person was confused, thinking that -bt output corresponded to deliveries.
2596 (Suppressing duplicates isn't a good idea as you lose the information
2597 about possibly different redirections that led to the duplicates.)
2599 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2600 systems where poll() doesn't work, in particular OS X.
2602 PH/10 Added more information to debugging output for retry time not reached.
2604 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2605 operations in malware.c.
2607 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2610 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2611 syslog_duplication set false, log lines that would normally be written
2612 both the the main log and to the reject log were not written to syslog at
2615 PH/14 In the default configuration, change the use of "message" in ACL warn
2616 statements to "add_header".
2618 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2619 not followed by a command (e.g. "seen endif").
2621 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2622 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2625 PH/17 Added extra conditions to the default value of delay_warning_condition
2629 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2630 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2631 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2634 The Auto-Submitted: and various List- headers are standardised, whereas I
2635 don't think Precedence: ever was.
2637 PH/18 Refactored debugging code in route_finduser() to show more information,
2638 in particular, the error code if getpwnam() issues one.
2640 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2641 This is apparently needed in addition to the PH/07 change above to avoid
2642 any possible encoding problems.
2644 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2645 but not after initializing Perl.
2647 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2648 output them only if debugging. By default they are written stderr,
2649 apparently, which is not desirable.
2651 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2654 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2657 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2659 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2660 authenticated or an ident call has been made. Suppress the default
2661 values for $authenticated_id and $authenticated_sender (but permit -oMai
2662 and -oMas) when testing with -bh.
2664 PH/24 Re-jigged the order of the tests in the default configuration so that the
2665 tests for valid domains and recipients precede the DNS black list and CSA
2666 tests, on the grounds that those ones are more expensive.
2668 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2669 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2670 This bug exists in every version of Exim that I still have, right back to
2673 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2674 However, an attempt to turn on case-sensitivity in a regex key by
2675 including (?-i) didn't work because the subject string was already
2676 lowercased, and the effects were non-intuitive. It turns out that a
2677 one-line patch can be used to allow (?-i) to work as expected.
2683 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2684 other effects) broke the use of negated acl sub-conditions.
2686 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2689 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2690 "Deny" causes Exim to reject the incoming connection with a 554 error.
2691 Unfortunately, if there is a major crisis, such as a disk failure,
2692 tcp-wrappers gives "deny", whereas what one would like would be some
2693 kind of temporary error. A kludge has been added to help with this.
2694 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2695 554 error is used if errno is still zero or contains ENOENT (which occurs
2696 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2699 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2701 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2702 errors. Otherwise a message that provokes a temporary error (when other
2703 messages do not) can cause a whole host to time out.
2705 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2706 addresses were routed directly to files or pipes from a redirect router.
2707 File deliveries just didn't batch; pipe deliveries might have suffered
2710 PH/06 A failure to get a lock for a hints database would erroneously always say
2711 "Failed to get write lock", even when it was really a read lock.
2713 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2714 of 0600. This has been changed to use the value of the lockfile_mode
2715 option (which defaults to 0600).
2717 PH/08 Applied small patch from the Sieve maintainer.
2719 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2720 folder from quota calculations, a direct delivery into this folder messed
2721 up the contents of the maildirsize file. This was because the regex was
2722 used only to exclude .Trash (or whatever) when the size of the mailbox
2723 was calculated. There was no check that a delivery was happening into an
2724 excluded directory. This bug has been fixed by ignoring all quota
2725 processing for deliveries into excluded directories.
2727 PH/10 Added the maildirfolder_create_regex option to appendfile.
2733 PH/01 The code for finding all the local interface addresses on a FreeBSD
2734 system running IPv6 was broken. This may well have applied to all BSD
2735 systems, as well as to others that have similar system calls. The broken
2736 code found IPv4 interfaces correctly, but gave incorrect values for the
2737 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2738 that it would not match correctly against @[] and not recognize the IPv6
2741 PH/02 The ipliteral router was not recognizing addresses of the form user@
2742 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2744 PH/03 Added disable_ipv6.
2746 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2747 decoded form, because it is most often used to construct To: headers
2748 lines in autoreplies, and the decoded form may well be syntactically
2749 invalid. However, $reply_address has leading white space removed, and all
2750 newlines turned into spaces so that the autoreply transport does not
2753 PH/05 If group was specified without a user on a router, and no group or user
2754 was specified on a transport, the group from the router was ignored.
2756 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2757 for visible compile-time settings that can be used to change these
2758 numbers, for those that want even more. Backwards compatibility with old
2759 spool files has been maintained. However, going back to a previous Exim
2760 release will lost any variables that are in spool files.
2762 PH/07 Two small changes when running in the test harness: increase delay when
2763 passing a TCP/IP connection to a new process, in case the original
2764 process has to generate a bounce, and remove special handling of
2765 127.0.0.2 (sic), which is no longer necessary.
2767 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2768 be the same on different OS.
2770 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2773 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2774 whether --show-vars was specified or not
2776 JJ/02 exipick: Added support for new ACL variable spool format introduced
2779 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2780 syntactically invalid From: or Reply-to: line, and a filter used this to
2781 generate an autoreply, and therefore failed to obtain an address for the
2782 autoreply, Exim could try to deliver to a non-existent relative file
2783 name, causing unrelated and misleading errors. What now happens is that
2784 it logs this as a hard delivery error, but does not attempt to create a
2787 PH/11 The exinext utility has a -C option for testing purposes, but although
2788 the given file was scanned by exinext itself; it wasn't being passed on
2789 when Exim was called.
2791 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2792 an end-of-file indication when reading a command response.
2794 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2795 compiled. In many other places in Exim, IPv6 addresses are always
2796 recognized, so I have changed this. It also means that IPv4 domain
2797 literals of the form [IPV4:n.n.n.n] are now always recognized.
2799 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2800 used if the router is not running as root, for example, when verifying at
2801 ACL time, or when using -bh. The debugging output from this situation was
2802 non-existent - all you got was a failure to exec. I have made two
2805 (a) Failures to set uid/gid, the current directory, or a process leader
2806 in a subprocess such as that created by queryprogram now generate
2807 suitable debugging ouput when -d is set.
2809 (b) The queryprogram router detects when it is not running as root,
2810 outputs suitable debugging information if -d is set, and then runs
2811 the subprocess without attempting to change uid/gid.
2813 PH/15 Minor change to Makefile for building test_host (undocumented testing
2816 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2817 additional section of a DNS packet that returns MX or SRV records.
2818 Instead, it always explicitly searches for A/AAAA records. This avoids
2819 major problems that occur when a DNS server includes only records of one
2820 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2821 fixed another bug: if SRV records were looked up and the corresponding
2822 address records were *not* found in the additional section, the port
2823 values from the SRV records were lost.
2825 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2826 using the correct key (the original address) when searching the retry
2827 rules in order to find which one to use for generating the retry hint.
2829 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2830 adding the default one. Similarly, if it contains a Reply-To: header, the
2831 errors_reply_to option, if set, is not used.
2833 PH/19 When calculating a retry time, Exim used to measure the "time since
2834 failure" by looking at the "first failed" field in the retry record. Now
2835 it does not use this if it is later than than the arrival time of the
2836 message. Instead it uses the arrival time. This makes for better
2837 behaviour in cases where some deliveries succeed, thus re-setting the
2838 "first failed" field. An example is a quota failure for a huge message
2839 when small messages continue to be delivered. Without this change, the
2840 "time since failure" will always be short, possible causing more frequent
2841 delivery attempts for the huge message than are intended.
2842 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2844 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2845 $1, $2, $3) because the numerical variables can be reset during some
2846 expansion items (e.g. "match"), thereby losing the authentication data.
2848 PH/21 Make -bV show the size of off_t variables so that the test suite can
2849 decide whether to run tests for quotas > 2G.
2851 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2852 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2853 filecount value is greater than 2G or if a quota value is greater than 2G
2854 on a system where the size of off_t is not greater than 4, a panic error
2857 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2858 never match. The debug and -bh output now contains an explicit error
2859 message indicating a malformed IPv4 address or mask.
2861 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2862 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2863 PH/23 above applies.
2865 PH/25 Do not write to syslog when running in the test harness. The only
2866 occasion when this arises is a failure to open the main or panic logs
2867 (for which there is an explicit test).
2869 PH/26 Added the /no_tell option to "control=freeze".
2871 PH/27 If a host name lookup failed very early in a connection, for example, if
2872 the IP address matched host_lookup and the reverse lookup yielded a name
2873 that did not have a forward lookup, an error message of the form "no IP
2874 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2875 could be logged. Now it outputs the IP address instead of "NULL".
2877 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2878 allows the sender and the authenticated sender to be set when
2879 submitting a message from within Exim. Since child_open_exim() is
2880 documented for local_scan(), the new function should be too.
2882 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2883 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2884 results in an empty string is now treated as unset.
2886 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2888 PH/31 Added sender_verify_fail logging option.
2890 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2891 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2892 tidied the source and removed it altogether.
2894 PH/33 When a queue run was abandoned because the load average was too high, a
2895 log line was always written; now it is written only if the queue_run log
2896 selector is set. In addition, the log line for abandonment now contains
2897 information about the queue run such as the pid. This is always present
2898 in "start" and "stop" lines but was omitted from the "abandon" line.
2900 PH/34 Omit spaces between a header name and the colon in the error message that
2901 is given when verify = headers_syntax fails (if there are lots of them,
2902 the message gets confusing).
2904 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2905 names, as there are now some PTR records that contain slashes. This check
2906 is only to protect against broken name servers that fall over on strange
2907 characters, so the fact that it applies to all lookups doesn't matter.
2909 PH/36 Now that the new test suite is complete, we can remove some of the
2910 special code in Exim that was needed for the old test suite. For example,
2911 sorting DNS records because real resolvers return them in an arbitrary
2912 order. The new test suite's fake resolver always returns records in the
2915 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2916 bounces) except when queue_only is set, to avoid logging races between
2917 the different processes.
2919 PH/38 Panic-die if .include specifies a non-absolute path.
2921 PH/39 A tweak to the "H" retry rule from its user.
2923 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2924 a label. They prevented compilation on older perls.
2926 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2927 a warning to be raised on newish perls.
2929 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2930 on queue. Changes to match documented behaviour of showing count of
2931 messages matching specified criteria.
2933 PH/40 Changed the default ident timeout from 30s to 5s.
2935 PH/41 Added support for the use of login_cap features, on those BSD systems
2936 that have them, for controlling the resources used by pipe deliveries.
2938 PH/42 The content-scanning code uses fopen() to create files in which to put
2939 message data. Previously it was not paying any attention to the mode of
2940 the files. Exim runs with umask(0) because the rest of the code creates
2941 files with open(), and sets the required mode explicitly. Thus, these
2942 files were ending up world-writeable. This was not a big issue, because,
2943 being within the spool directory, they were not world-accessible. I have
2944 created a function called modefopen, which takes an additional mode
2945 argument. It sets umask(777), creates the file, chmods it to the required
2946 mode, then resets the umask. All the relevant calls to fopen() in the
2947 content scanning code have been changed to use this function.
2949 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2950 to 24 hours. This avoids potential overflow problems when processing G
2951 and H retry rules. I suspect nobody ever tinkers with this value.
2953 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2955 PH/45 When the plaintext authenticator is running as a client, the server's
2956 challenges are checked to ensure they are valid base64 strings. By
2957 default, the authentication attempt is cancelled if an invalid string is
2958 received. Setting client_ignore_invalid_base64 true ignores these errors.
2959 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2960 they are received. Thus, the responses can be made to depend on the
2961 challenges. If an invalid string is ignored, an empty string is placed in
2964 PH/46 Messages that are created by the autoreply transport now contains a
2965 References: header, in accordance with RFCs 2822 and 3834.
2967 PH/47 Added authenticated_sender_force to the smtp transport.
2969 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2971 PH/49 Installed latest patch from the Sieve maintainer.
2973 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2974 was also set, the appendfile transport was unnecessarily scanning a
2975 directory of message files (e.g. for maildir delivery) to find the count
2976 of files (along with the size), even though it did not need this
2977 information. It now does the scan only if it needs to find either the
2978 size of the count of files.
2980 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2982 PH/52 Two bugs concerned with error handling when the smtp transport is
2985 (i) Exim was not creating retry information for temporary errors given
2986 for individual recipients after the DATA command when the smtp transport
2987 was used in LMTP mode. This meant that they could be retried too
2988 frequently, and not timed out correctly.
2990 (ii) Exim was setting the flag that allows error details to be returned
2991 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2992 recipients that were returned after the DATA command.
2994 PH/53 This is related to PH/52, but is more general: for any failing address,
2995 when detailed error information was permitted to be returned to the
2996 sender, but the error was temporary, then after the final timeout, only
2997 "retry timeout exceeded" was returned. Now it returns the full error as
2998 well as "retry timeout exceeded".
3000 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3001 do this, and (what is worse) MTAs that accept it.
3003 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3004 will now be deprecated.
3006 PH/56 New os.c-cygwin from the Cygwin maintainer.
3008 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3009 formats (previously only available in exim formats via -bpr, -bpru,
3010 and -bpra. Now also available in native and exiqgrep formats)
3012 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3013 with very large, slow to parse queues
3015 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3017 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3019 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3020 responses to authentication challenges, though it was showing the
3021 challenges; (ii) I've removed the CR characters from the debug output for
3024 PH/58 Allow for the insertion of a newline as well as a space when a string
3025 is turned into more than one encoded-word during RFC 2047 encoding. The
3026 Sieve code now uses this.
3028 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3029 data_4xx, lost_connection, tls_required.
3031 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3032 message was being sent as an SMTP response.
3034 PH/61 Add -l and -k options to exicyclog.
3036 PH/62 When verifying, if an address was redirected to one new address, so that
3037 verification continued, and the new address failed or deferred after
3038 having set something in $address_data, the value of $address_data was not
3039 passed back to the ACL. This was different to the case when no
3040 redirection occurred. The value is now passed back in both cases.
3042 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3043 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3044 use login_cap.h, so on its own it isn't the distinguishing feature. The
3045 new name refers directly to the setclassresources() function.
3047 PH/65 Added configuration files for NetBSD3.
3049 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3051 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3052 is preferred over IPv4.
3054 PH/68 The bounce_return_message and bounce_return_body options were not being
3055 honoured for bounces generated during the reception of non-SMTP messages.
3056 In particular, this applied to messages rejected by the ACL. This bug has
3057 been fixed. However, if bounce_return_message is true and bounce_return_
3058 body is false, the headers that are returned for a non-SMTP message
3059 include only those that have been read before the error was detected.
3060 (In the case of an ACL rejection, they have all been read.)
3062 PH/69 The HTML version of the specification is now built in a directory called
3063 spec_html instead of spec.html, because the latter looks like a path with
3064 a MIME-type, and this confuses some software.
3066 PH/70 Catch two compiler warnings in sieve.c.
3068 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3069 function verify_get_ident() calls ip_connect() to connect a socket, but
3070 if the "connect()" function timed out, ip_connect() used to close the
3071 socket. However, verify_get_ident() also closes the socket later, and in
3072 between Exim writes to the log, which may get opened at this point. When
3073 the socket was closed in ip_connect(), the log could get the same file
3074 descriptor number as the socket. This naturally causes chaos. The fix is
3075 not to close the socket in ip_connect(); the socket should be closed by
3076 the function that creates it. There was only one place in the code where
3077 this was missing, in the iplookup router, which I don't think anybody now
3078 uses, but I've fixed it anyway.
3080 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3081 well as to direct DNS lookups. Otherwise the handling of names in host
3082 lists is inconsistent and therefore confusing.
3088 PH/01 Two changes to the default runtime configuration:
3090 (1) Move the checks for relay_from_hosts and authenticated clients from
3091 after to before the (commented out) DNS black list checks.
3093 (2) Add control=submission to the relay_from_hosts and authenticated
3094 clients checks, on the grounds that messages accepted by these
3095 statements are most likely to be submissions.
3097 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3099 (1) Generate an error if the third argument for the ${prvs expansion is
3102 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3105 (3) Reset the variables that are obtained from the first argument of
3106 ${prvscheck and used in the second argument before leaving the code,
3107 because their memory is reclaimed, so using them afterwards may do
3110 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3111 one (it's much easier than Tom thought :-).
3113 (5) Because of (4), we can now allow for the use of $prvscheck_result
3114 inside the third argument.
3116 PH/03 For some reason, the default setting of PATH when running a command from
3117 a pipe transport was just "/usr/bin". I have changed it to
3120 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3121 anything to be listed in the output from -bV.
3123 PH/05 When a filter generated an autoreply, the entire To: header line was
3124 quoted in the delivery log line, like this:
3126 => >A.N.Other <ano@some.domain> <original@ddress> ...
3128 This has been changed so that it extracts the operative address. There
3129 may be more than one such address. If so, they are comma-separated, like
3132 => >ano@some.domain,ona@other.domain <original@ddress> ...
3134 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3135 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3136 not being looked up in the rDNS to get a host name, Exim was showing the
3137 IP address twice in Received: lines, even though the IP addresses were
3138 identical. For example:
3140 Received: from [1.2.3.4] (helo=[1.2.3.4])
3142 However, if the real host name was known, it was omitting the HELO data
3143 if it matched the actual IP address. This has been tidied up so that it
3144 doesn't show the same IP address twice.
3146 PH/07 When both +timestamp and +memory debugging was on, the value given by
3147 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3148 called by the debug printing, thereby overwriting the timestamp buffer.
3149 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3151 PH/08 When the original message was included in an autoreply transport, it
3152 always said "this is a copy of the message, including all the headers",
3153 even if body_only or headers_only was set. It now gives an appropriate
3156 PH/09 Applied a patch from the Sieve maintainer which:
3158 o fixes some comments
3159 o adds the (disabled) notify extension core
3160 o adds some debug output for the result of if/elsif tests
3161 o points to the current vacation draft in the documentation
3162 and documents the missing references header update
3166 o fixes a bug in processing the envelope test (when testing
3167 multiple envelope elements, the last element determinted the
3170 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3171 Electronic Mail") by including:
3173 Auto-submitted: auto-generated
3175 in the messages that it generates (bounce messages and others, such as
3176 warnings). In the case of bounce messages for non-SMTP mesages, there was
3177 also a typo: it was using "Auto_submitted" (underscore instead of
3178 hyphen). Since every message generated by Exim is necessarily in response
3179 to another message, thes have all been changed to:
3181 Auto-Submitted: auto-replied
3183 in accordance with these statements in the RFC:
3185 The auto-replied keyword:
3187 - SHOULD be used on messages sent in direct response to another
3188 message by an automatic process,
3190 - MUST NOT be used on manually-generated messages,
3192 - MAY be used on Delivery Status Notifications (DSNs) and Message
3193 Disposition Notifications (MDNs),
3195 - MUST NOT be used on messages generated by automatic or periodic
3196 processes, except for messages which are automatic responses to
3199 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3200 to the default Received: header definition.
3202 PH/12 Added log selector acl_warn_skipped (default on).
3204 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3205 variables because (a) they are in the wrong storage pool and (b) even if
3206 they were copied, it wouldn't work properly because of the caching.
3208 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3209 checking when decoding. Apparently there are clients that generate
3210 overlong encoded strings. Why am I not surprised?
3212 PH/15 If the first argument of "${if match_address" was not empty, but did not
3213 contain an "@" character, Exim crashed. Now it writes a panic log message
3214 and treats the condition as false.
3216 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3218 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3219 extension "envelope-auth". The code is finished and in agreement with
3220 other implementations, but there is no documentation so far and in fact,
3221 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3222 not changing the active code.
3224 Print executed "if" and "elsif" statements when debugging is used. This
3225 helps a great deal to understand what a filter does.
3227 Document more things not specified clearly in RFC3028. I had all this
3228 sorted out, when out of a sudden new issues came to my mind. Oops."
3230 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3233 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3234 canonical form (as documented). However, after a host name lookup from
3235 the IP address, check_host() was doing a simple string comparison with
3236 addresses acquired from the DNS when checking that the found name did
3237 have the original IP as one of its addresses. Since any found IPv6
3238 addresses are likely to be in abbreviated form, the comparison could
3239 fail. Luckily, there already exists a function for doing the comparison
3240 by converting both addresses to binary, so now that is used instead of
3241 the text comparison.
3243 PH/20 There was another similar case to PH/19, when a complete host name was
3244 given in a host list; looking up its IP address could give an abbreviated
3245 form, whereas the current host's name might or might not be abbreviated.
3246 The same fix has been applied.
3252 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3253 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3256 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3257 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3259 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3261 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3262 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3263 Also, for "Auto-Submitted", treat anything other than "no" as
3264 non-personal, in accordance with RFC 3834. (Previously it treated
3265 anything starting "auto-" as non-personal.)
3267 TF/01 The control=submission/name=... option had a problem with syntax
3268 errors if the name included a slash character. The /name= option
3269 now slurps the rest of the string, so it can include any characters
3270 but it must come last in the list of options (after /sender_retain
3273 PH/05 Some modifications to the interface to the fake nameserver for the new
3281 TK/01 Added the "success_on_redirect" address verification option. See
3282 NewStuff for rationale and an example.
3284 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3286 PH/02 Patch to exigrep to allow it to work on syslog lines.
3288 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3289 fread() to skip over the body file's header line, because in Cygwin the
3290 header line is locked and is inaccessible.
3292 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3293 co-exist for some time) to make it clear that it is the Exim ID that is
3294 referenced, not the Message-ID: header line.
3296 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3297 string_format() function, because snprintf() does not exist on all
3300 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3301 ${stat: expansion item.
3303 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3304 protocol synchronization error", to keep the pedants happy.
3306 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3307 well as for IRIX systems, when gcc is being used. See the host.c source
3310 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3312 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3315 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3316 transport and to the smtp transport in LMTP mode.
3318 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3320 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3321 run a filter in a subprocess. This could lead to confusion in subsequent
3322 lookups in the parent process. There should also be a search_tidyup() at
3323 the end of the subprocess.
3325 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3326 only if the host matched helo_try_verify_hosts, which caused the
3327 verification to occur when the EHLO/HELO command was issued. The ACL just
3328 tested the remembered result. Now, if a previous verification attempt has
3329 not happened, "verify = helo" does it there and then.
3331 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3333 TK/03 Fix log output including CR from clamd.
3335 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3336 exist provoked a memory error which could cause a segfault.
3338 PH/15 Installed PCRE 6.2
3340 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3342 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3343 of the problem. Specifically, suggested +O2 rather than +O1 for the
3346 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3348 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3349 record, the port was not correctly logged when the outgoing_port log
3350 selector was set (it logged the transort's default port).
3352 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3353 fallback_hosts, and "hosts" in the smtp transport.
3355 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3356 host errors such as "Connection refused".
3358 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3359 authentication with radiusclient 0.4.9:
3361 - Error returned from rc_read_config was caught wrongly
3362 - Username/password not passed on to radius server due to wrong length.
3364 The presumption is that some radiusclient API changes for 4.51/PH/17
3365 were not taken care of correctly. The code is still untested by me (my
3366 Linux distribution still has 0.3.2 of radiusclient), but it was
3367 contributed by a Radius user.
3369 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3370 expanding the "port" option of the smtp transport.
3372 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3373 while reading a MIME header. Thanks to Tom Hughes for a patch.
3375 PH/24 Include config.h inside local_scan.h so that configuration settings are
3378 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3379 that in an ACL for RCPT (for example), you can examine exactly what was
3382 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3383 commands, but it was not correctly comparing the address with the actual
3384 client host address. Thus, it would show the EHLO address in Received:
3385 header lines when this was not necessary.
3387 PH/27 Added the % operator to ${eval:}.
3389 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3390 it should be ignoring failures (because with -C, for example, it has lost
3391 privilege). It wasn't ignoring creation failures other than "already
3394 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3397 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3398 because an input line was too long, either on its own, or by virtue of
3399 too many continuations, the temporary file was not being removed, and the
3400 return code was incorrect.
3402 PH/31 Missing "BOOL" in function definition in filtertest.c.
3404 PH/32 Applied Sieve patches from the maintainer.
3406 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3408 PH/33 Added "verify = not_blind".
3410 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3411 Local/Makefile (with some defaults set). These are used in built scripts
3412 such as exicyclog, but they have never been used in the exim_install
3413 script (though there are many overriding facilities there). I have
3414 arranged that the exim_install script now takes note of these two
3417 PH/35 Installed configuration files for Dragonfly.
3419 PH/36 When a locally submitted message by a trusted user did not contain a
3420 From: header, and the sender address was obtained from -f or from an SMTP
3421 MAIL command, and the trusted user did not use -F to supply a sender
3422 name, $originator_name was incorrectly used when constructing a From:
3423 header. Furthermore, $originator_name was used for submission mode
3424 messages from external hosts without From: headers in a similar way,
3425 which is clearly wrong.
3427 PH/37 Added control=suppress_local_fixups.
3429 PH/38 When log_selector = +received_sender was set, and the addition of the
3430 sender made the log line's construction buffer exactly full, or one byte
3431 less than full, an overflow happened when the terminating "\n" was
3434 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3435 when the result of a list match is failure because a DNS lookup failed.
3437 PH/40 RM_COMMAND is now used in the building process.
3439 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3440 the "build-* directories that it finds.
3442 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3443 address in a domain literal was a prefix of an interface address.
3445 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3446 when verifying a sender address, unless rewrite_headers is false.
3448 PH/44 Wrote a long comment about why errors_to addresses are verified as
3449 recipients, not senders.
3451 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3452 the ratelimit ACL was added.
3454 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3456 PH/46 Added extra information about PostgreSQL errors to the error string.
3458 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3459 avoiding the need to install special zones in a real server. This is
3460 backwards compatible; if it can't find the fake resolver, it drops back.
3461 Thus, both old and new test suites can be run.
3463 TF/02 Added util/ratelimit.pl
3465 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3466 clock is set back in time.
3468 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3469 Candler <B.Candler@pobox.com>.
3471 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3472 OK for addresses that are the result of redirections.
3474 PH/48 A number of further additions for the benefit of the new test suite,
3475 including a fake gethostbyname() that interfaces to the fake DNS resolver
3478 TF/06 The fix for widen_domains has also been applied to qualify_single and
3479 search_parents which are the other dnslookup options that can cause
3482 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3485 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3487 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3488 service" if it encountered an MX record with an empty target hostname.
3489 The message is now "an MX or SRV record indicated no SMTP service".
3491 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3492 if the DNS of the sending site is misconfigured. This is quite a
3493 common situation. This change restores the behaviour of treating a
3494 helo verification defer as a failure.
3496 PH/51 If self=fail was set on a router, the bounce message did not include the
3497 actual error message.
3503 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3505 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3506 command itself ended in error, the underlying message about the transport
3507 filter timeout was being overwritten with the pipe command error. Now the
3508 underlying error message should be appended to the second error message.
3510 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3512 PH/02 Reduce the amount of output that "make" produces by default. Full output
3513 can still be requested.
3515 PH/03 The warning log line about a condition test deferring for a "warn" verb
3516 was being output only once per connection, rather than after each
3517 occurrence (because it was using the same function as for successful
3518 "warn" verbs). This seems wrong, so I have changed it.
3520 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3521 it should not have, which might have caused a crash in the right
3522 circumstances, but probably never did.
3524 PH/04 Installed a modified version of Tony Finch's patch to make submission
3525 mode fix the return path as well as the Sender: header line, and to
3526 add a /name= option so that you can make the user's friendly name appear
3529 TF/03 Added the control = fakedefer ACL modifier.
3531 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3532 Mark Lowes for thorough testing.
3534 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3536 TK/03 Merged latest SRS patch from Miles Wilton.
3538 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3539 with the definition in sysexits.h (which is #included earlier).
3540 Fortunately, Exim does not actually use EX_OK. The code used to try to
3541 preserve the sysexits.h value, by assumimg that macro definitions were
3542 scanned for macro replacements. I have been disabused of this notion,
3543 so now the code just undefines EX_OK before #including unistd.h.
3545 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3546 in the smtp transport. When a block could not be written in a single
3547 write() function, the timeout was being re-applied to each part-write.
3548 This seems wrong - if the receiver was accepting one byte at a time it
3549 would take for ever. The timeout is now adjusted when this happens. It
3550 doesn't have to be particularly precise.
3552 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3553 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3555 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3556 without a domain if the check to <postmaster@domain> fails.
3558 SC/01 Eximstats: added -xls and the ability to specify output files
3559 (patch written by Frank Heydlauf).
3561 SC/02 Eximstats: use FileHandles for outputing results.
3563 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3565 SC/04 Eximstats: fixed display of large numbers with -nvr option
3567 SC/05 Eximstats: fixed merging of reports with empty tables.
3569 SC/06 Eximstats: added the -include_original_destination flag
3571 SC/07 Eximstats: removed tabs and trailing whitespace.
3573 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3575 TK/06 MBOX spool code: Add real "From " MBOX separator line
3576 so the .eml file is really in mbox format (even though
3577 most programs do not really care). Patch from Alex Miller.
3579 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3580 The latter is generated from $received_to and is only set if the
3581 message has one envelope recipient. SA can use these headers,
3582 obviously out-of-the-box. Patch from Alex Miller.
3584 PH/08 The ${def test on a variable was returning false if the variable's
3585 value was "0", contrary to what the specification has always said!
3586 The result should be true unless the variable is empty.
3588 PH/09 The syntax error of a character other than { following "${if
3589 def:variable_name" (after optional whitespace) was not being diagnosed.
3590 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3591 accidental colon was present, for example, could give incorrect results.
3593 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3594 result is used (not including appendfile, where other changes are about
3597 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3598 This involved changing a lot of size variables from int to off_t. It
3599 should work with maildirs and everything.
3601 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3602 spamd dying while we are connected to it.
3604 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3607 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3608 function for BDB 4.3.
3610 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3612 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3613 the sources for PCRE have been re-arranged and more files are now
3616 PH/15 The code I had for printing potentially long long variables in PH/11
3617 above was not the best (it lost precision). The length of off_t variables
3618 is now inspected at build time, and an appropriate printing format (%ld
3619 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3620 to be "long long int" or "long int". This is needed for the internal
3621 formatting function string_vformat().
3623 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3624 the configuration file to be ":syslog", then the script "guesses" where
3625 the logs files are, rather than using the compiled in default. In our
3626 case the guess is not the same as the compiled default, so the script
3627 suddenly stopped working when I started to use syslog. The patch checks
3628 to see if log_file_path is "". If so, it attempts to read it from exim
3629 with no configuration file to get the compiled in version, before it
3630 falls back to the previous guessing code."
3632 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3633 implementing BATV in an Exim configuration. See NewStuff for the gory
3636 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3637 Makefile that are specific to HP-UX.
3639 PH/18 If the "use_postmaster" option was set for a recipient callout together
3640 with the "random" option, the postmaster address was used as the MAIL
3641 FROM address for the random test, but not for the subsequent recipient
3642 test. It is now used for both.
3644 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3645 patch removes a few documentation additions to RFC 3028, because the
3646 latest draft now contains them. It adds the new en;ascii-case comparator
3647 and a new error check for 8bit text in MIME parts. Comparator and
3648 require names are now matched exactly. I enabled the subaddress
3649 extension, but it is not well tested yet (read: it works for me)."
3651 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3652 rework some of the code of TK/09 above to avoid the hardwired use of
3653 "%lld" and "long long". Replaced the call to snprintf() with a call to
3656 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3657 records point to non-existent hosts", "retry timeout exceeded", and
3658 "retry time not reached for any host after a long failure period".
3660 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3661 experimental DomainKeys support:
3663 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3664 (2) On an error such as an illegally used "control", the wrong name for
3665 the control was given.
3667 These problems did NOT occur unless DomainKeys support was compiled.
3669 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3671 PH/24 Added ${if match_ip condition.
3673 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3674 databases so that it will be absolutely obvious if a crash occurs in the
3675 DB library. This is a regular occurrence (often caused by mis-matched
3678 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3679 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3680 picked up on a user's system that detects such things. There doesn't seem
3681 to be a gcc warning option for this - only an attribute that has to be
3682 put on the function's prototype. It seems that in Fedora Core 4 they have
3683 set this on a number of new functions. No doubt there will be more in due
3686 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3687 specify a transport. However, if an address that was verified by such a
3688 router was the subject of a callout, Exim crashed because it tried to
3689 read the rcpt_include_affixes from the non-existent transport. Now it
3690 just assumes that the setting of that option is false. This bug was
3691 introduced by 4.51/PH/31.
3693 PH/28 Changed -d+all to exclude +memory, because that information is very
3694 rarely of interest, but it makes the output a lot bigger. People tend to
3695 do -d+all out of habit.
3697 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3698 code in os-type was giving problems when libc.so lives in lib64, like on
3701 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3702 aren't the modern standard, and it seems that some systems' include files
3703 don't always have them. Exim was already checking for some of the newer
3704 ones like T_AAAA, and defining it itself. I've added checks for all the
3705 record types that Exim uses.
3707 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3708 not automatically generating a new one, as it is supposed to. This
3709 prevented TLS from working. If the file did exist, but contained invalid
3710 data, a new version was generated, as expected. It was only the case of a
3711 non-existent file that was broken.
3713 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3714 with a change in libdomainkeys > 0.64.
3716 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3717 from DNS. If the selector record carries the flag, it now has
3718 precedence over the domain-wide flag.
3720 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3722 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3723 the use of a port name that isn't defined in /etc/services) occurred, the
3724 message was deferred as in a normal delivery, and thus remained on the
3725 spool, instead of being failed because of the mua_wrapper setting. This
3726 is now fixed, and I tidied up some of the mua_wrapper messages at the
3729 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3730 the messages in a hash of arrays rather than using individual hashes.
3731 This is a bit cleaner and results in dramatic memory savings, albeit
3732 at a slight CPU cost.
3734 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3735 as requested by Marc Sherman.
3737 SC/10 Eximstats: added histograms for user specified patterns as requested
3740 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3742 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3743 fopen() in the content-scanning modules that did not already have it.
3749 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3750 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3752 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3754 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3756 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3757 to test Sieve filters that use "vacation".
3759 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3760 that changes the way the GnuTLS parameters are stored in the cache file.
3761 The new format can be generated externally. For backward compatibility,
3762 if the data in the cache doesn't make sense, Exim assumes it has read an
3763 old-format file, and it generates new data and writes a new file. This
3764 means that you can't go back to an older release without removing the
3767 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3768 work if there are any delivery delays because "one_time" forces the
3769 parent to be marked "delivered", so its unseen clone is never tried
3770 again. For this reason, Exim now forbids the simultaneous setting of
3773 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3774 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3775 entry if you want to know the details. The fix, however, neglected to
3776 consider the case when local delivery batching is involved. The test for
3777 "previously delivered" was not happening when checking to see if an
3778 address could be batched with a previous (undelivered) one; under
3779 certain circumstances this could lead to multiple deliveries to the same
3782 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3783 in its include files, and this causes problems building Exim.
3785 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3786 header_syntax) but Exim was just ignoring anything given after a slash.
3787 In particular, this caused confusion with an attempt to use "verify =
3788 reverse_host_lookup/defer_ok". An error is now given when options are
3789 supplied for verify items that do not have them. (Maybe reverse_host_
3790 lookup should have a defer_ok option, but that's a different point.)
3792 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3793 defined by RFC 821) to 2048, because there were problems with some AUTH
3794 commands, and RFC 1869 says the size should be increased for extended
3795 SMTP commands that take arguments.
3797 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3800 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3801 "unknown" error; now it says that the functionality isn't in the binary.
3803 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3804 an address' error message when a string expansion fails (syntax or
3805 whatever). Otherwise the password may appear in the log. Following change
3806 PH/42 below, there is no longer a chance of it appearing in a bounce
3809 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3811 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3812 of its addresses was ever tried. (Bugzilla bug #2.)
3814 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3815 the result incorrectly in the debug output. (It correctly added a newline
3816 to what was transported.)
3818 TF/01 Added $received_time.
3820 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3821 commented out examples of how to interface to a virus scanner and to
3822 SpamAssassin. Also added commented examples of av_scanner and
3823 spamd_address settings.
3825 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3826 and controls are allowed in which ACLs. There were a couple of minor
3827 errors. Some of the entries in the conditions table (which is a table of
3828 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3829 negation of where the condition IS allowed.
3831 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3833 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3834 header file does not have a version number, so I've had to invent a new
3835 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3836 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3837 radiusclient), but it was contributed by a Radius user.
3839 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3840 files or directories, for OpenSSL.
3842 PH/19 When an Exim process that is running as root has to create an Exim log
3843 file, it does so in a subprocess that runs as exim:exim so as to get the
3844 ownership right at creation (otherwise, other Exim processes might see
3845 the file with the wrong ownership). There was no test for failure of this
3846 fork() call, which would lead to the process getting stuck as it waited
3847 for a non-existent subprocess. Forks do occasionally fail when resources
3848 run out. I reviewed all the other calls to fork(); they all seem to check
3851 PH/20 When checking for unexpected SMTP input at connect time (before writing
3852 the banner), Exim was not dealing correctly with a non-positive return
3853 from the read() function. If the client had disconnected by this time,
3854 the result was a log entry for a synchronization error with an empty
3855 string after "input=" when read() returned zero. If read() returned -1
3856 (an event I could not check), uninitialized data bytes were printed.
3857 There were reports of junk text (parts of files, etc) appearing after
3860 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3862 PH/22 Added support for macro redefinition, and (re)definition in between
3863 driver and ACL definitions.
3865 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3866 forgetting to use the resulting value; it was using the unexpanded value.
3868 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3869 hadn't been configured. The fix is from Juergen Kreileder, who
3870 understands it better than I do:
3872 "Here's what I see happening with three configured cyrus_sasl
3873 authenticators configured (plain, login, cram-md5):
3875 On startup auth_cyrus_sasl_init() gets called for each of these.
3876 This means three calls to sasl_listmech() without a specified mech_list.
3877 => SASL tests which mechs of all available mechs actually work
3878 => three warnings about OTP not working
3879 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3881 With the patch, sasl_listmech() also gets called three times. But now
3882 SASL's mech_list option is set to the server_mech specified in the the
3883 authenticator. Or in other words, the answer from sasl_listmech()
3884 gets limited to just the mech you're testing for (which is different
3886 => the return list contains just 'plain' or 'login', 'cram-md5' or
3887 nothing depending on the value of ob->server_mech.
3889 I've just tested the patch: Authentication still works fine,
3890 unavailable mechs specified in the exim configuration are still
3891 caught, and the auth.log warnings about OTP are gone."
3893 PH/25 When debugging is enabled, the contents of the command line are added
3894 to the debugging output, even when log_selector=+arguments is not
3897 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3898 answer is "GNU", and only if the return is "GNU/something" is the answer
3901 PH/27 $acl_verify_message is now set immediately after the failure of a
3902 verification in an ACL, and so is available in subsequent modifiers. In
3903 particular, the message can be preserved by coding like this:
3905 warn !verify = sender
3906 set acl_m0 = $acl_verify_message
3908 Previously, $acl_verify_message was set only while expanding "message"
3909 and "log_message" when a very denied access.
3911 PH/28 Modified OS/os.c-Linux with
3913 -#ifndef OS_LOAD_AVERAGE
3914 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3916 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3917 nomenclature these days.)
3919 PH/29 Installed patch from the Sieve maintainer that adds the options
3920 sieve_useraddress and sieve_subaddress to the redirect router.
3922 PH/30 In these circumstances:
3923 . Two addresses routed to the same list of hosts;
3924 . First host does not offer TLS;
3925 . First host accepts first address;
3926 . First host gives temporary error to second address;
3927 . Second host offers TLS and a TLS session is established;
3928 . Second host accepts second address.
3929 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3930 and peerdn, if requested) that were in fact used only for the second
3933 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3934 attention to any local part prefix or suffix that was matched by the
3935 router that accepted the address. It now behaves in the same way as it
3936 does for delivery: the affixes are removed from the local part unless
3937 rcpt_include_affixes is set on the transport.
3939 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3940 timeout during the DATA phase of an incoming message.
3942 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3943 applied a patch sanctioned by the Sieve maintainer.
3945 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3946 the uid or gid is negative. A case of a negative gid caused this to be
3947 noticed. The fix allows for either to be negative.
3949 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3950 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3953 PH/36 The change PH/12 above was broken. Fixed it.
3955 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3956 the grounds that routing the same address twice would always produce the
3957 same answer. This might have been true once, but it is certainly no
3958 longer true now. Routing a child address may depend on the previous
3959 routing that produced that child. Some complicated redirection strategies
3960 went wrong when messages had multiple recipients, and made Exim's
3961 behaviour dependent on the order in which the addresses were given.
3963 I have moved the duplicate checking until after the routing is complete.
3964 Exim scans the addresses that are assigned to local and remote
3965 transports, and removes any duplicates. This means that more work will be
3966 done, as duplicates will always all be routed, but duplicates are
3967 presumably rare, so I don't expect this is of any significance.
3969 For deliveries to pipes, files, and autoreplies, the duplicate checking
3970 still happens during the routing process, since they are not going to be
3973 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3974 It corrects a timeout issue with spamd. This is Ian's comment: "The
3975 background is that sometimes spamd either never reads data from a
3976 connection it has accepted, or it never writes response data. The exiscan
3977 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3978 blindly assumes that writes won't block so it may never time out."
3980 PH/39 Allow G after quota size as well as K and M.
3982 PH/40 The value set for $authenticated_id in an authenticator may not contain
3983 binary zeroes or newlines because the value is written to log lines and
3984 to spool files. There was no check on this. Now the value is run through
3985 the string_printing() function so that such characters are converted to
3986 printable escape sequences.
3988 PH/41 $message_linecount is a new variable that contains the total number of
3989 lines in the message. Compare $body_linecount, which is the count for the
3992 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3993 bounce and delay warning messages, except in certain special cases, which
3996 (a) An SMTP error message from a remote host;
3997 (b) A message specified in a :fail: redirection;
3998 (c) A message specified in a "fail" command in a system filter;
3999 (d) A message specified in a FAIL return from the queryprogram router;
4000 (e) A message specified by the cannot_route_message router option.
4002 In these cases only, Exim does include the error details in bounce and
4003 warning messages. There are also a few cases where bland messages such
4004 as "unrouteable address" or "local delivery error" are given.
4006 PH/43 $value is now also set for the "else" part of a ${run expansion.
4008 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4009 being worked on, but at least Exim now implements the latest version to
4012 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4013 process to complete was treated as a delivery failure, a timeout while
4014 writing the message to the pipe was logged, but erroneously treated as a
4015 successful delivery. Such timeouts include transport filter timeouts. For
4016 consistency with the overall process timeout, these timeouts are now
4017 treated as errors, giving rise to delivery failures by default. However,
4018 there is now a new Boolean option for the pipe transport called
4019 timeout_defer, which, if set TRUE, converts the failures into defers for
4020 both kinds of timeout. A transport filter timeout is now identified in
4023 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4024 systems where "make" and "gmake" are different, calling "gmake" at top
4025 level broke things. I've arranged for the value of $(MAKE) to be passed
4026 from the Makefile to this script so that it can call the same version of
4030 A note about Exim versions 4.44 and 4.50
4031 ----------------------------------------
4033 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4034 changes of various kinds. As a consequence, a big documentation update was
4035 needed. This delayed the release for rather longer than seemed good, especially
4036 in the light of a couple of (minor) security issues. Therefore, the changes
4037 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4038 release. So 4.44 and 4.50 are in effect two different branches that both start
4041 I have left the 4.50 change log unchanged; it contains all the changes since
4042 4.43. The change log for 4.44 is below; many of its items are identical to
4043 those for 4.50. This seems to be the most sensible way to preserve the
4044 historical information.
4050 1. Minor wording change to the doc/README.SIEVE file.
4052 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4053 computation of the current number of files was incorrect.
4055 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4056 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4059 4. Give more explanation in the error message when the command for a transport
4060 filter fails to execute.
4062 5. There are several places where Exim runs a non-Exim command in a
4063 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4064 was being done only for the command run by the queryprogram router. It is
4065 now done for all such subprocesses. The other cases are: ${run, transport
4066 filters, and the commands run by the lmtp and pipe transports.
4068 6. Added CONFIGURE_GROUP build-time option.
4070 7. Some older OS have a limit of 256 on the maximum number of file
4071 descriptors. Exim was using setrlimit() to set 1000 as a large value
4072 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4073 systems. I've change it so that if it can't get 1000, it tries for 256.
4075 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4076 was an oversight, and furthermore, ever since the addition of extra
4077 controls (e.g. 4.43/32), the checks on when to allow different forms of
4078 "control" were broken. There should now be diagnostics for all cases when a
4079 control that does not make sense is encountered.
4081 9. Added the /retain_sender option to "control=submission".
4083 10. $recipients is now available in the predata ACL (oversight).
4085 11. Tidy the search cache before the fork to do a delivery from a message
4086 received from the command line. Otherwise the child will trigger a lookup
4087 failure and thereby defer the delivery if it tries to use (for example) a
4088 cached ldap connection that the parent has called unbind on.
4090 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4091 of $address_data from the recipient verification was clobbered by the
4092 sender verification.
4094 13. The value of address_data from a sender verification is now available in
4095 $sender_address_data in subsequent conditions in the ACL statement.
4097 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4099 15. Added a new option "connect=<time>" to callout options, to set a different
4102 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4103 was its contents. (It was OK if the option was not defined at all.)
4105 17. A "Completed" log line is now written for messages that are removed from
4106 the spool by the -Mrm option.
4108 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4109 information about exactly what failed.
4111 19. Added -dd to debug only the daemon process.
4113 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4114 handles timeouts, both on the server side and network timeouts. Renamed the
4115 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4117 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4118 It is now set to "smtps".
4120 22. $host_address is now set to the target address during the checking of
4121 ignore_target_hosts.
4123 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4124 being passed; this would have caused $sender_host_name to have been used if
4125 matching the list had actually called for a host name (not very likely,
4126 since this list is usually IP addresses). A host name is now passed as
4129 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4130 code that specifies a non-restarting handler (typically sigaction() in
4131 modern systems) in an attempt to fix a rare and obscure crash bug.
4133 25. Narrowed the window for a race in the daemon that could cause it to ignore
4134 SIGCHLD signals. This is not a major problem, because they are used only to
4135 wake it up if nothing else does.
4137 26. A malformed maildirsize file could cause Exim to calculate negative values
4138 for the mailbox size or file count. Odd effects could occur as a result.
4139 The maildirsize information is now recalculated if the size or filecount
4142 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4143 support for a long time. Removed HAVE_SYS_VFS_H.
4145 28. Installed the latest version of exipick from John Jetmore.
4147 29. In an address list, if the pattern was not a regular expression, an empty
4148 subject address (from a bounce message) matched only if the pattern was an
4149 empty string. Non-empty patterns were not even tested. This was the wrong
4150 because it is perfectly reasonable to use an empty address as part of a
4151 database query. An empty address is now tested by patterns that are
4152 lookups. However, all the other forms of pattern expect the subject to
4153 contain a local part and a domain, and therefore, for them, an empty
4154 address still always fails if the pattern is not itself empty.
4156 30. Exim went into a mad DNS loop when attempting to do a callout where the
4157 host was specified on an smtp transport, and looking it up yielded more
4158 than one IP address.
4160 31. Re-factored the code for checking spool and log partition space into a
4161 function that finds that data and another that does the check. The former
4162 is then used to implement four new variables: $spool_space, $log_space,
4163 $spool_inodes, and $log_inodes.
4165 32. The RFC2047 encoding function was originally intended for short strings
4166 such as real names; it was not keeping to the 75-character limit for
4167 encoded words that the RFC imposes. It now respects the limit, and
4168 generates multiple encoded words if necessary. To be on the safe side, I
4169 have increased the buffer size for the ${rfc2047: expansion operator from
4172 33. It is now permitted to omit both strings after an "if" condition; if the
4173 condition is true, the result is "true". As before, when the second string
4174 is omitted, a false condition yields an empty string. This makes it less
4175 cumbersome to write custom ACL and router conditions.
4177 34. Failure to deliver a bounce message always caused it to be frozen, even if
4178 there was an errors_to setting on the router. The errors_to setting is now
4181 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4182 canonical form (fully expanded) before being placed in
4183 $sender_host_address.
4185 36. The table in the code that translates DNS record types into text (T_A to
4186 "A" for instance) was missing entries for NS and CNAME. It is just possible
4187 that this could have caused confusion if both these types were looked up
4188 for the same domain, because the text type is used as part of Exim's
4189 per-process caching. But the chance of anyone hitting this buglet seems
4192 37. The dnsdb lookup has been extended in a number of ways.
4194 (1) There is a new type, "zns", which walks up the domain tree until it
4195 finds some nameserver records. It should be used with care.
4197 (2) There is a new type, "mxh", which is like "mx" except that it returns
4198 just the host names, not the priorities.
4200 (3) It is now possible to give a list of domains (or IP addresses) to be
4201 looked up. The behaviour when one of the lookups defers can be
4202 controlled by a keyword.
4204 (4) It is now possible to specify the separator character for use when
4205 multiple records are returned.
4207 38. The dnslists ACL condition has been extended: it is now possible to supply
4208 a list of IP addresses and/or domains to be looked up in a particular DNS
4211 39. Added log_selector=+queue_time_overall.
4213 40. When running the queue in the test harness, wait just a tad after forking a
4214 delivery process, to get repeatability of debugging output.
4216 41. Include certificate and key file names in error message when GnuTLS fails
4217 to set them up, because the GnuTLS error message doesn't include the name
4218 of the failing file when there is a problem reading it.
4220 42. Allow both -bf and -bF in the same test run.
4222 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4224 44. The "Exiscan patch" is now merged into the mainline Exim source.
4226 45. Sometimes the final signoff response after QUIT could fail to get
4227 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4228 < 0 before doing a fflush(). This bug looks as though it goes back to the
4229 introduction of TLS in release 3.20, but "sometimes" must have been rare
4230 because the tests only now provoked it.
4232 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4233 (this can affect the format of dates).
4235 47. exim_tidydb, when checking for the continued existence of a message for
4236 which it has found a message-specific retry record, was not finding
4237 messages that were in split spool directories. Consequently, it was
4238 deleting retry records that should have stayed in existence.
4240 48. Steve fixed some bugs in eximstats.
4242 49. The SPA authentication driver was not abandoning authentication and moving
4243 on to the next authenticator when an expansion was forced to fail,
4244 contradicting the general specification for all authenticators. Instead it
4245 was generating a temporary error. It now behaves as specified.
4247 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4248 (the order specifies the preference for clients). The order is now AES256,
4249 AES128, 3DES, ARCFOUR128.
4251 51. Small patch to Sieve code - explicitly set From: when generating an
4254 52. Exim crashed if a remote delivery caused a very long error message to be
4255 recorded - for instance if somebody sent an entire SpamAssassin report back
4256 as a large number of 550 error lines. This bug was coincidentally fixed by
4257 increasing the size of one of Exim's internal buffers (big_buffer) that
4258 happened as part of the Exiscan merge. However, to be on the safe side, I
4259 have made the code more robust (and fixed the comments that describe what
4262 53. Now that there can be additional text after "Completed" in log lines (if
4263 the queue_time_overall log selector is set), a one-byte patch to exigrep
4264 was needed to allow it to recognize "Completed" as not the last thing in
4267 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4268 patch that reportedly fixes this has been added. I am not expert enough to
4269 create a test for it. This is what the patch creator wrote:
4271 "I found a little strange behaviour of ldap code when working with
4272 Windows 2003 AD Domain, where users was placed in more than one
4273 Organization Units. When I tried to give exim partial DN, the exit code
4274 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4275 But simultaneously result of request was absolutely normal ldap result,
4276 so I produce this patch..."
4278 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4279 REFERENCE, so I have modified the code to exclude the patch when that macro
4282 55. Some experimental protocols are using DNS PTR records for new purposes. The
4283 keys for these records are domain names, not reversed IP addresses. The
4284 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4285 leaves it alone. Component reversal etc. now happens only for IP addresses.
4288 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4290 57. Double the size of the debug message buffer (to 2048) so that more of very
4291 long debug lines gets shown.
4293 58. The exicyclog utility now does better if the number of log files to keep
4294 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4296 59. Two changes related to the smtp_active_hostname option:
4298 (1) $smtp_active_hostname is now available as a variable.
4299 (2) The default for smtp_banner uses $smtp_active_hostname instead
4300 of $primary_hostname.
4302 60. The host_aton() function is supposed to be passed a string that is known
4303 to be a valid IP address. However, in the case of IPv6 addresses, it was
4304 not checking this. This is a hostage to fortune. Exim now panics and dies
4305 if the condition is not met. A case was found where this could be provoked
4306 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4307 components; fortuitously, this particular loophole had already been fixed
4308 by change 4.50/55 above.
4310 If there are any other similar loopholes, the new check in host_aton()
4311 itself should stop them being exploited. The report I received stated that
4312 data on the command line could provoke the exploit when Exim was running as
4313 exim, but did not say which command line option was involved. All I could
4314 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4315 running as the user.
4318 61. There was a buffer overflow vulnerability in the SPA authentication code
4319 (which came originally from the Samba project). I have added a test to the
4320 spa_base64_to_bits() function which I hope fixes it.
4323 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4324 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4326 63. The daemon start-up calls getloadavg() while still root for those OS that
4327 need the first call to be done as root, but it missed one case: when
4328 deliver_queue_load_max is set with deliver_drop_privilege. This is
4329 necessary for the benefit of the queue runner, because there is no re-exec
4330 when deliver_drop_privilege is set.
4332 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4333 This has been fixed.
4335 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4336 was in use, was not putting the data itself into the right store pool;
4337 consequently, it could be overwritten for a subsequent message in the same
4338 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4341 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4343 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4344 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4345 the function were treating the return as a boolean value, which happened to
4346 work because 0=false and not-0=true, but is not correct code.
4348 68. The host_aton() function was not handling scoped IPv6 addresses (those
4349 with, for example, "%eth0" on the end) correctly.
4351 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4352 negated items (that is, ~something) in unsigned ints. Some compilers
4353 apparently mutter when there is no cast.
4355 70. If an address verification called from an ACL failed, and did not produce a
4356 user-specific message (i.e. there was only a "system" message), nothing was
4357 put in $acl_verify_message. In this situation, it now puts the system
4360 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4361 session; change 4.31/43 added the unwanted input to the log line - except
4362 that it did not do this in the start of session case. It now does.
4364 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4365 This is wrong and can cause the other end to generate a synchronization
4366 error if it is another Exim or anything else that does the synchronization
4367 check. A QUIT command is no longer sent after a timeout.
4369 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4370 during host lookups.
4372 74. The defer_ok option of callout verification was not working if it was used
4373 when verifying addresses in header lines, that is, for this case:
4375 verify = header_sender/callout=defer_ok
4377 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4378 those file descriptors could be used for SMTP connections. If anything
4379 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4380 could be sent to the SMTP client, causing chaos. The daemon now opens
4381 stdin, stdout, and stderr to /dev/null when it puts itself into the
4384 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4385 log by default. The user can override this with suitable Perl magic.
4387 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4388 the log message when discard triggers, was not working for the DATA ACL or
4389 for the non-SMTP ACL.
4391 78. Error message wording change in sieve.c.
4393 79. If smtp_accept_max_per_host was set, the number of connections could be
4394 restricted to fewer than expected, because the daemon was trying to set up
4395 a new connection before checking whether the processes handling previous
4396 connections had finished. The check for completed processes is now done
4397 earlier. On busy systems, this bug wouldn't be noticed because something
4398 else would have woken the daemon, and it would have reaped the completed
4401 80. If a message was submitted locally by a user whose login name contained one
4402 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4403 It caused a spool format error. I have fixed the spool reading code. A
4404 related problem was that the "from" clause in the Received: line became
4405 illegal because of the space(s). It is now covered by ${quote_local_part.
4407 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4410 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4412 83. Patch from Sieve maintainer to fix unterminated string problem in
4413 "vacation" handling.
4415 84. Some minor changes to the Linux configuration files to help with other
4416 OS variants using glibc.
4418 85. One more patch for Sieve to update vacation handling to latest spec.
4421 ----------------------------------------------------
4422 See the note above about the 4.44 and 4.50 releases.
4423 ----------------------------------------------------
4429 1. Change 4.43/35 introduced a bug that caused file counts to be
4430 incorrectly computed when quota_filecount was set in an appendfile
4433 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4434 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4437 3. Give more explanation in the error message when the command for a transport
4438 filter fails to execute.
4440 4. There are several places where Exim runs a non-Exim command in a
4441 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4442 was being done only for the command run by the queryprogram router. It is
4443 now done for all such subprocesses. The other cases are: ${run, transport
4444 filters, and the commands run by the lmtp and pipe transports.
4446 5. Some older OS have a limit of 256 on the maximum number of file
4447 descriptors. Exim was using setrlimit() to set 1000 as a large value
4448 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4449 systems. I've change it so that if it can't get 1000, it tries for 256.
4451 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4452 was an oversight, and furthermore, ever since the addition of extra
4453 controls (e.g. 4.43/32), the checks on when to allow different forms of
4454 "control" were broken. There should now be diagnostics for all cases when a
4455 control that does not make sense is encountered.
4457 7. $recipients is now available in the predata ACL (oversight).
4459 8. Tidy the search cache before the fork to do a delivery from a message
4460 received from the command line. Otherwise the child will trigger a lookup
4461 failure and thereby defer the delivery if it tries to use (for example) a
4462 cached ldap connection that the parent has called unbind on.
4464 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4465 of $address_data from the recipient verification was clobbered by the
4466 sender verification.
4468 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4469 was its contents. (It was OK if the option was not defined at all.)
4471 11. A "Completed" log line is now written for messages that are removed from
4472 the spool by the -Mrm option.
4474 12. $host_address is now set to the target address during the checking of
4475 ignore_target_hosts.
4477 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4478 being passed; this would have caused $sender_host_name to have been used if
4479 matching the list had actually called for a host name (not very likely,
4480 since this list is usually IP addresses). A host name is now passed as
4483 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4484 code that specifies a non-restarting handler (typically sigaction() in
4485 modern systems) in an attempt to fix a rare and obscure crash bug.
4487 15. Narrowed the window for a race in the daemon that could cause it to ignore
4488 SIGCHLD signals. This is not a major problem, because they are used only to
4489 wake it up if nothing else does.
4491 16. A malformed maildirsize file could cause Exim to calculate negative values
4492 for the mailbox size or file count. Odd effects could occur as a result.
4493 The maildirsize information is now recalculated if the size or filecount
4496 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4497 support for a long time. Removed HAVE_SYS_VFS_H.
4499 18. Updated exipick to current release from John Jetmore.
4501 19. Allow an empty sender to be matched against a lookup in an address list.
4502 Previously the only cases considered were a regular expression, or an
4505 20. Exim went into a mad DNS lookup loop when doing a callout where the
4506 host was specified on the transport, if the DNS lookup yielded more than
4509 21. The RFC2047 encoding function was originally intended for short strings
4510 such as real names; it was not keeping to the 75-character limit for
4511 encoded words that the RFC imposes. It now respects the limit, and
4512 generates multiple encoded words if necessary. To be on the safe side, I
4513 have increased the buffer size for the ${rfc2047: expansion operator from
4516 22. Failure to deliver a bounce message always caused it to be frozen, even if
4517 there was an errors_to setting on the router. The errors_to setting is now
4520 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4521 canonical form (fully expanded) before being placed in
4522 $sender_host_address.
4524 24. Updated eximstats to version 1.33
4526 25. Include certificate and key file names in error message when GnuTLS fails
4527 to set them up, because the GnuTLS error message doesn't include the name
4528 of the failing file when there is a problem reading it.
4530 26. Expand error message when OpenSSL has problems setting up cert/key files.
4533 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4534 (this can affect the format of dates).
4536 28. exim_tidydb, when checking for the continued existence of a message for
4537 which it has found a message-specific retry record, was not finding
4538 messages that were in split spool directories. Consequently, it was
4539 deleting retry records that should have stayed in existence.
4541 29. eximstats updated to version 1.35
4542 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4543 1.35 - bugfix such that pie charts by volume are generated correctly
4545 30. The SPA authentication driver was not abandoning authentication and moving
4546 on to the next authenticator when an expansion was forced to fail,
4547 contradicting the general specification for all authenticators. Instead it
4548 was generating a temporary error. It now behaves as specified.
4550 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4551 (the order specifies the preference for clients). The order is now AES256,
4552 AES128, 3DES, ARCFOUR128.
4554 31. Small patch to Sieve code - explicitly set From: when generating an
4557 32. Exim crashed if a remote delivery caused a very long error message to be
4558 recorded - for instance if somebody sent an entire SpamAssassin report back
4559 as a large number of 550 error lines. This bug was coincidentally fixed by
4560 increasing the size of one of Exim's internal buffers (big_buffer) that
4561 happened as part of the Exiscan merge. However, to be on the safe side, I
4562 have made the code more robust (and fixed the comments that describe what
4565 33. Some experimental protocols are using DNS PTR records for new purposes. The
4566 keys for these records are domain names, not reversed IP addresses. The
4567 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4568 leaves it alone. Component reversal etc. now happens only for IP addresses.
4571 34. The host_aton() function is supposed to be passed a string that is known
4572 to be a valid IP address. However, in the case of IPv6 addresses, it was
4573 not checking this. This is a hostage to fortune. Exim now panics and dies
4574 if the condition is not met. A case was found where this could be provoked
4575 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4576 components; fortuitously, this particular loophole had already been fixed
4577 by change 4.50/55 or 4.44/33 above.
4579 If there are any other similar loopholes, the new check in host_aton()
4580 itself should stop them being exploited. The report I received stated that
4581 data on the command line could provoke the exploit when Exim was running as
4582 exim, but did not say which command line option was involved. All I could
4583 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4584 running as the user.
4587 35. There was a buffer overflow vulnerability in the SPA authentication code
4588 (which came originally from the Samba project). I have added a test to the
4589 spa_base64_to_bits() function which I hope fixes it.
4592 36. The daemon start-up calls getloadavg() while still root for those OS that
4593 need the first call to be done as root, but it missed one case: when
4594 deliver_queue_load_max is set with deliver_drop_privilege. This is
4595 necessary for the benefit of the queue runner, because there is no re-exec
4596 when deliver_drop_privilege is set.
4598 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4599 was in use, was not putting the data itself into the right store pool;
4600 consequently, it could be overwritten for a subsequent message in the same
4601 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4604 38. Sometimes the final signoff response after QUIT could fail to get
4605 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4606 < 0 before doing a fflush(). This bug looks as though it goes back to the
4607 introduction of TLS in release 3.20, but "sometimes" must have been rare
4608 because the tests only now provoked it.
4614 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4615 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4616 Now it returns an integer. A number of calls were still expecting a T/F
4617 return. Fortuitously, in all cases, the tests worked in OK situations,
4618 which is the norm. However, things would have gone wrong on any write
4619 failures on the smtp file descriptor. This function is used when sending
4620 messages over SMTP and also when doing verify callouts.
4622 2. When Exim is called to do synchronous delivery of a locally submitted
4623 message (the -odf or -odi options), it no longer closes stderr before doing
4626 3. Implemented the mua_wrapper option.
4628 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4630 5. Implemented the functions header_remove(), header_testname(),
4631 header_add_at_position(), and receive_remove_recipient(), and exported them
4634 6. If an ACL "warn" statement specified the addition of headers, Exim already
4635 inserted X-ACL-Warn: at the start if there was no header name. However, it
4636 was not making this test for the second and subsequent header lines if
4637 there were newlines in the string. This meant that an invalid header could
4638 be inserted if Exim was badly configured.
4640 7. Allow an ACL "warn" statement to add header lines at the start or after all
4641 the Received: headers, as well as at the end.
4643 8. Added the rcpt_4xx retry error code.
4645 9. Added postmaster_mailfrom=xxx to callout verification option.
4647 10. Added mailfrom=xxxx to the callout verification option, for verify=
4650 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4651 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4653 12. Inserted some casts to stop certain compilers warning when using pointer
4654 differences as field lengths or precisions in printf-type calls (mostly
4655 affecting debugging statements).
4657 13. Added optional readline() support for -be (dynamically loaded).
4659 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4660 same clock tick as a message's arrival, so that its received time was the
4661 same as the "first fail" time on the retry record, and that message
4662 remained on the queue past the ultimate address timeout, every queue runner
4663 would try a delivery (because it was past the ultimate address timeout) but
4664 after another failure, the ultimate address timeout, which should have then
4665 bounced the address, did not kick in. This was a "< instead of <=" error;
4666 in most cases the first failure would have been in the next clock tick
4667 after the received time, and all would be well.
4669 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4670 being recognized when the domain list was tested by the match_domain
4671 condition in an expansion string.
4673 16. Added the ${str2b64: operator.
4675 17. Exim was always calling setrlimit() to set a large limit for the number of
4676 processes, without checking whether the existing limit was already
4677 adequate. (It did check for the limit on file descriptors.) Furthermore,
4678 errors from getrlimit() and setrlimit() were being ignored. Now they are
4679 logged to the main and panic logs, but Exim does carry on, to try to do its
4680 job under whatever limits there are.
4682 18. Imported PCRE 5.0.
4684 19. Trivial typo in log message " temporarily refused connection" (the leading
4687 20. If the log selector return_path_on_delivery was set and an address was
4688 redirected to /dev/null, the delivery process crashed because it assumed
4689 that a return path would always be set for a "successful" delivery. In this
4690 case, the whole delivery is bypassed as an optimization, and therefore no
4693 21. Internal re-arrangement: the function for sending a challenge and reading
4694 a response while authentication was assuming a zero-terminated challenge
4695 string. It's now changed to take a pointer and a length, to allow for
4696 binary data in such strings.
4698 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4700 23. Exim was not respecting finduser_retries when seeking the login of the
4701 uid under which it was called; it was always trying 10 times. (The default
4702 setting of finduser_retries is zero.) Also, it was sleeping after the final
4703 failure, which is pointless.
4705 24. Implemented tls_on_connect_ports.
4707 25. Implemented acl_smtp_predata.
4709 26. If the domain in control=submission is set empty, Exim assumes that the
4710 authenticated id is a complete email address when it generates From: or
4711 Sender: header lines.
4713 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4714 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4715 chown and chgrp in /bin and hostname in /usr/bin.
4717 28. Exim was keeping the "process log" file open after each use, just as it
4718 does for the main log. This opens the possibility of it remaining open for
4719 long periods when the USR1 signal hits a daemon. Occasional processlog
4720 errors were reported, that could have been caused by this. Anyway, it seems
4721 much more sensible not to leave this file open at all, so that is what now
4724 29. The long-running daemon process does not normally write to the log once it
4725 has entered its main loop, and it closes the log before doing so. This is
4726 so that log files can straightforwardly be renamed and moved. However,
4727 there are a couple of unusual error situations where the daemon does write
4728 log entries, and I had neglected to close the log afterwards.
4730 30. The text of an SMTP error response that was received during a remote
4731 delivery was being truncated at 512 bytes. This is too short for some of
4732 the long messages that one sometimes sees. I've increased the limit to
4735 31. It is now possible to make retry rules that apply only when a message has a
4736 specific sender, in particular, an empty sender.
4738 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4739 it possible to be selective about when SMTP synchronization is enforced.
4741 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4743 32. Implemented hosts_connection_nolog.
4745 33. Added an ACL for QUIT.
4747 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4750 35. Added mailbox_size and mailbox_filecount to appendfile.
4752 36. Added control = no_multiline_responses to ACLs.
4754 37. There was a bug in the logic of the code that waits for the clock to tick
4755 in the case where the clock went backwards by a substantial amount such
4756 that the microsecond fraction of "now" was more than the microsecond
4757 fraction of "then" (but the whole seconds number was less).
4759 38. Added support for the libradius Radius client library this is found on
4760 FreeBSD (previously only the radiusclient library was supported).
4766 1. When certain lookups returned multiple values in the form name=value, the
4767 quoting of the values was not always being done properly. Specifically:
4768 (a) If the value started with a double quote, but contained no whitespace,
4770 (b) If the value contained whitespace other than a space character (i.e.
4771 tabs or newlines or carriage returns) it was not quoted.
4772 This fix has been applied to the mysql and pgsql lookups by writing a
4773 separate quoting function and calling it from the lookup code. The fix
4774 should probably also be applied to nisplus, ibase and oracle lookups, but
4775 since I cannot test any of those, I have not disturbed their existing code.
4777 2. A hit in the callout cache for a specific address caused a log line with no
4778 reason for rejecting RCPT. Now it says "Previous (cached) callout
4779 verification failure".
4781 3. There was an off-by-one bug in the queryprogram router. An over-long
4782 return line was truncated at 256 instead of 255 characters, thereby
4783 overflowing its buffer with the terminating zero. As well as fixing this, I
4784 have increased the buffer size to 1024 (and made a note to document this).
4786 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4787 when Exim is waiting for an SMTP response from a remote server, Exim
4788 restarts its select() call on the socket, thereby resetting its timeout.
4789 This is not a problem when such interrupts are rare. Somebody set up a cron
4790 job to run exiwhat every 2 minutes, which is less than the normal select()
4791 timeout (5 or 10 minutes). This meant that the select() timeout never
4792 kicked in because it was always reset. I have fixed this by comparing the
4793 time when an interrupt arrives with the time at the start of the first call
4794 to select(). If more time than the timeout has elapsed, the interrupt is
4795 treated as a timeout.
4797 5. Some internal re-factoring in preparation for the addition of Sieve
4798 extensions (by MH). In particular, the "personal" test is moved to a
4799 separate function, and given an option for scanning Cc: and Bcc: (which is
4800 not set for Exim filters).
4802 6. When Exim created an email address using the login of the caller as the
4803 local part (e.g. when creating a From: or Sender: header line), it was not
4804 quoting the local part when it contained special characters such as @.
4806 7. Installed new OpenBSD configuration files.
4808 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4809 try to make them clearer.
4811 9. Callout options, other than the timeout value, were being ignored when
4812 verifying sender addresses in header lines. For example, when using
4814 verify = header_sender/callout=no_cache
4816 the cache was (incorrectly) being used.
4818 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4819 only the Cygwin environment.
4821 11. When return_path_on_delivery was set as a log selector, if different remote
4822 addresses in the same message used different return paths and parallel
4823 remote delivery occurred, the wrong values would sometimes be logged.
4824 (Whenever a remote delivery process finished, the return path value from
4825 the most recently started remote delivery process was logged.)
4827 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4828 lines when AUTH and/or TLS are in use. This is the "received protocol"
4829 field. Exim used to use "asmtp" for authenticated SMTP, without any
4830 indication (in the protocol name) for TLS use. Now it follows the RFC and
4831 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4832 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4833 names appear in log lines as well as in Received: header lines.
4835 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4836 extensions, and comparison tests, and to fix some bugs.
4838 14. Changes to the "personal" filter test:
4840 (1) The test was buggy in that it was just doing the equivalent of
4841 "contains" tests on header lines. For example, if a user's address was
4842 anne@some.where, the "personal" test would incorrectly be true for
4844 To: susanne@some.where
4846 This test is now done by extracting each address from the header in turn,
4847 and checking the entire address. Other tests that are part of "personal"
4848 are now done using regular expressions (for example, to check local parts
4849 of addresses in From: header lines).
4851 (2) The list of non-personal local parts in From: addresses has been
4852 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4853 taken from the Sieve specification recommendations.
4855 (3) If the message contains any header line starting with "List-" it is
4856 treated as non-personal.
4858 (4) The test for "circular" in the Subject: header line has been removed
4859 because it now seems ill-conceived.
4861 15. Minor typos in src/EDITME comments corrected.
4863 16. Installed latest exipick from John Jetmore.
4865 17. If headers_add on a router specified a text string that was too long for
4866 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4867 of string_sprintf() is now avoided.
4869 18. $message_body_size was not set (it was always zero) when running the DATA
4870 ACL and the local_scan() function.
4872 19. For the "mail" command in an Exim filter, no default was being set for
4873 the once_repeat time, causing a random time value to be used if "once" was
4874 specified. (If the value happened to be <= 0, no repeat happened.) The
4875 default is now 0s, meaning "never repeat". The "vacation" command was OK
4876 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4877 (I found it when inspecting the code).
4879 20. There is now an overall timeout for performing a callout verification. It
4880 defaults to 4 times the callout timeout, which applies to individual SMTP
4881 commands during the callout. The overall timeout applies when there is more
4882 than one host that can be tried. The timeout is checked before trying the
4883 next host. This prevents very long delays if there are a large number of
4884 hosts and all are timing out (e.g. when the network connections are timing
4885 out). The value of the overall timeout can be changed by specifying an
4886 additional sub-option for "callout", called "maxwait". For example:
4888 verify = sender/callout=5s,maxwait=20s
4890 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4891 to the end before writing, but this should make it even safer).
4893 22. Exim was forgetting that it had advertised PIPELINING for the second and
4894 subsequent messages on an SMTP connection. It was also not resetting its
4895 memory on STARTTLS and an internal HELO.
4897 23. When Exim logs an SMTP synchronization error within a session, it now
4898 records whether PIPELINING has been advertised or not.
4900 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4901 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4902 rather than long int.
4904 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4906 26. Added the never_mail option to autoreply.
4912 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4913 crash if the getsockname() call failed; this can happen if a connection is
4914 closed very soon after it is established. The problem was simply in the
4915 order in which certain operations were done, causing Exim to try to write
4916 to the SMTP stream before it had set up the file descriptor. The bug has
4917 been fixed by making things happen in the correct order.
4923 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4924 before the connection was closed, thus losing the rejection response.
4926 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4927 some early Solaris releases, but causes trouble in current releases where
4928 socklen_t is defined.
4930 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4933 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4936 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4937 that releasing the top of it at the end releases what was used for sub-
4938 expansions (unless the block got too big). However, discard this block if
4939 the first thing is a variable or header, so that we can use its block when
4940 it is dynamic (useful for very large $message_headers, for example).
4942 6. Lookups now cache *every* query, not just the most recent. A new, separate
4943 store pool is used for this. It can be recovered when all lookup caches are
4944 flushed. Lookups now release memory at the end of their result strings.
4945 This has involved some general refactoring of the lookup sources.
4947 7. Some code has been added to the store_xxx() functions to reduce the amount
4948 of flapping under certain conditions.
4950 8. log_incoming_interface used to affect only the <= reception log lines. Now
4951 it causes the local interface and port to be added to several more SMTP log
4952 lines, for example "SMTP connection from", and rejection lines.
4954 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4956 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4958 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4959 could be overwritten at the end of the current message (or the start of a
4960 new message if it was set in a HELO ACL). The value is now preserved for
4961 the duration of the SMTP connection.
4963 12. If a transport had a headers_rewrite setting, and a matching header line
4964 contained an unqualified address, that address was qualified, even if it
4965 did not match any rewriting rules. The underlying bug was that the values
4966 of the flags that permit the existence of unqualified sender and recipient
4967 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4968 non-local messages, and by -bnq for local messages) were not being
4969 preserved with the message after it was received.
4971 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4972 "next input=" as part of the text comprising the host identity instead of
4973 the correct text. The code was using the same buffer for two different
4974 strings. However, depending on which order the printing function evaluated
4975 its arguments, the bug did not always show up. Under Linux, for example, my
4976 test suite worked just fine.
4978 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4979 doesn't work with some older versions of Perl. It has been changed to "my",
4980 which in any case is probably the better facility to use.
4982 15. A really picky compiler found some instances of statements for creating
4983 error messages that either had too many or two few arguments for the format
4986 16. The size of the buffer for calls to the DNS resolver has been increased
4987 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4988 for addresses that have a lot of PTR records. This alleviates a problem; it
4989 does not fully solve it.
4991 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4992 buffer now truncates the list and logs the incident, which is the same
4993 action as happens when Exim is looking up a host name and its aliases.
4994 Previously in this situation something unpredictable would happen;
4995 sometimes it was "internal error: store_reset failed".
4997 18. If a server dropped the connection unexpectedly when an Exim client was
4998 using GnuTLS and trying to read a response, the client delivery process
4999 crashed while trying to generate an error log message.
5001 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5002 string, for example:
5004 warn message = H1: something\nH2: something
5006 the text was added as a single header line from Exim's point of view
5007 though it ended up OK in the delivered message. However, searching for the
5008 second and subsequent header lines using $h_h2: did not work. This has been
5009 fixed. Similarly, if a system filter added multiple headers in this way,
5010 the routers could not see them.
5012 20. Expanded the error message when iplsearch is called with an invalid key to
5013 suggest using net-iplsearch in a host list.
5015 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5016 ACLs are no longer actually imposed (and a message to that effect is
5019 22. If a "gecos" field in a passwd entry contained escaped characters, in
5020 particular, if it contained a \" sequence, Exim got it wrong when building
5021 a From: or a Sender: header from that name. A second bug also caused
5022 incorrect handling when an unquoted " was present following a character
5023 that needed quoting.
5025 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5026 was not being matched caselessly.
5028 24. Arranged for all hyphens in the exim.8 source to be escaped with
5031 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5032 properly. Recipient callout cache records were still being keyed to include
5033 the sender, even when use_sender was set false. This led to far more
5034 callouts that were necessary. The sender is no longer included in the key
5035 when use_sender is false.
5037 26. Added "control = submission" modifier to ACLs.
5039 27. Added the ${base62d: operator to decode base 62 numbers.
5041 28. dnsdb lookups can now access SRV records.
5043 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5044 the configuration file.
5046 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5047 (-v) mode. This makes the output for a verbose queue run more intelligible.
5049 31. Added a use_postmaster feature to recipient callouts.
5051 32. Added the $body_zerocount variable, containing the number of binary zero
5052 bytes in the message body.
5054 33. The time of last modification of the "new" subdirectory is now used as the
5055 "mailbox time last read" when there is a quota error for a maildir
5058 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5060 35. Added +ignore_unknown as a special item in host lists.
5062 36. Code for decoding IPv6 addresses in host lists is now included, even if
5063 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5064 address was recognized as an IP address, but was then not correctly decoded
5065 into binary, causing unexpected and incorrect effects when compared with
5072 1. Very minor rewording of debugging text in manualroute to say "list of
5073 hosts" instead of "hostlist".
5075 2. If verify=header_syntax was set, and a header line with an unqualified
5076 address (no domain) and a large number of spaces between the end of the
5077 name and the colon was received, the reception process suffered a buffer
5078 overflow, and (when I tested it) crashed. This was caused by some obsolete
5079 code that should have been removed. The fix is to remove it!
5081 3. When running in the test harness, delay a bit after writing a bounce
5082 message to get a bit more predictability in the log output.
5084 4. Added a call to search_tidyup() just before forking a reception process. In
5085 theory, someone could use a lookup in the expansion of smtp_accept_max_
5086 per_host which, without the tidyup, could leave open a database connection.
5088 5. Added the variables $recipient_data and $sender_data which get set from a
5089 lookup success in an ACL "recipients" or "senders" condition, or a router
5090 "senders" option, similar to $domain_data and $local_part_data.
5092 6. Moved the writing of debug_print from before to after the "senders" test
5095 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5096 problems for message scanning, either using a data ACL, or using
5097 local_scan() because the Received: header was not generated till after they
5098 were called (in order to set the time as the time of reception completion).
5099 I have revised the way this works. The header is now generated after the
5100 body is received, but before the ACL or local_scan() are called. After they
5101 are run, the timestamp in the header is updated.
5107 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5108 before starting a queue runner without re-exec. This happened only when
5109 deliver_drop_privilege was set or when the Exim user was set to root. The
5110 effect of the bug was that timeouts during subsequent deliveries caused
5111 crashes instead of being properly handled. The handler is now left at its
5112 default (and expected) setting.
5114 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5115 message, again when deliver_drop_privilege is set or Exim is run as root.
5116 The bug described in (1) was not present in this case, but the tidying up
5117 of the other signals was missing. I have made the two cases consistent.
5119 3. The ignore_target_hosts setting on a manualroute router was being ignored
5120 for hosts that were looked up using the /MX notation.
5122 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5125 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5126 operated on the sender address. After changing the $sender_address to <>
5127 for the sender address verify, Exim was re-instated it as the original
5128 (before rewriting) address, but remembering that it had rewritten it, so it
5129 wasn't rewriting it again. This bug also had the effect of breaking the
5130 sender address verification caching when the sender address was rewritten.
5132 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5133 This has been changed so that if the ip literal address matches
5134 ignore_target_hosts, the router declines.
5136 7. Added expansion conditions match_domain, match_address, and match_local_
5137 part (NOT match_host).
5139 8. The placeholder for the Received: header didn't have a length field set.
5141 9. Added code to Exim itself and to exim_lock to test for a specific race
5142 condition that could lead to file corruption when using MBX delivery. The
5143 issue is with the lockfile that is created in /tmp. If this file is removed
5144 after a process has opened it but before that process has acquired a lock,
5145 there is the potential for a second process to recreate the file and also
5146 acquire a lock. This could lead to two Exim processes writing to the file
5147 at the same time. The added code performs the same test as UW imapd; it
5148 checks after acquiring the lock that its file descriptor still refers to
5149 the same named file.
5151 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5152 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5155 11. Added the smtp_active_hostname option. If used, this will typically be made
5156 to depend on the incoming interface address. Because $interface_address is
5157 not set up until the daemon has forked a reception process, error responses
5158 that can happen earlier (such as "too many connections") no longer contain
5161 12. If an expansion in a condition on a "warn" statement fails because a lookup
5162 defers, the "warn" statement is abandoned, and the next ACL statement is
5163 processed. Previously this caused the whole ACL to be aborted.
5165 13. Added the iplsearch lookup type.
5167 14. Added ident_timeout as a log selector.
5169 15. Added tls_certificate_verified as a log selector.
5171 16. Added a global option tls_require_ciphers (compare the smtp transport
5172 option of the same name). This controls incoming TLS connections.
5174 17. I finally figured out how to make tls_require_ciphers do a similar thing
5175 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5176 before starting the TLS session.
5178 18. Tabs are now shown as \t in -bP output.
5180 19. If the log selector return_path_on_delivery was set, Exim crashed when
5181 bouncing a message because it had too many Received: header lines.
5183 20. If two routers both had headers_remove settings, and the first one included
5184 a superfluous trailing colon, the final name in the first list and the
5185 first name in the second list were incorrectly joined into one item (with a
5186 colon in the middle).
5192 1. Added -C and -D options to the exinext utility, mainly to make it easier
5193 to include in the automated testing, but these could be helpful when
5194 multiple configurations are in use.
5196 2. The exinext utility was not formatting the output nicely when there was
5197 an alternate port involved in the retry record key, nor when there was a
5198 message id as well (for retries that were specific to a specific message
5199 and a specific host). It was also confused by IPv6 addresses, because of
5200 the additional colons they contain. I have fixed the IPv4 problem, and
5201 patched it up to do a reasonable job for IPv6.
5203 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5204 delivery, the log line now contains "pipelined" if PIPELINING was used.
5206 4. An SMTP transport process used to panic and die if the bind() call to set
5207 an explicit outgoing interface failed. This has been changed; it is now
5208 treated in the same way as a connect() failure.
5210 5. A reference to $sender_host_name in the part of a conditional expansion
5211 that was being skipped was still causing a DNS lookup. This no longer
5214 6. The def: expansion condition was not recognizing references to header lines
5215 that used bh_ and bheader_.
5217 7. Added the _cache feature to named lists.
5219 8. The code for checking quota_filecount in the appendfile transport was
5220 allowing one more file than it should have been.
5222 9. For compatibility with Sendmail, the command line option
5230 and sets the incoming protocol and host name (for trusted callers). The
5231 host name and its colon can be omitted when only the protocol is to be set.
5232 Note the Exim already has two private options, -pd and -ps, that refer to
5233 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5234 "s", but I don't think that's a major issue.
5236 10. A number of refactoring changes to the code, none of which should affect
5239 (a) The number of logging options was getting close to filling up the
5240 32-bit word that was used as a bit map. I have split them into two classes:
5241 those that are passed in the argument to log_write(), and those that are
5242 only ever tested independently outside of that function. These are now in
5243 separate 32-bit words, so there is plenty of room for expansion again.
5244 There is no change in the user interface or the logging behaviour.
5246 (b) When building, for example, log lines, the code previously used a
5247 macro that called string_cat() twice, in order to add two strings. This is
5248 not really sufficiently general. Furthermore, there was one instance where
5249 it was actually wrong because one of the argument was used twice, and in
5250 one call a function was used. (As it happened, calling the function twice
5251 did not affect the overall behaviour.) The macro has been replaced by a
5252 function that can join an arbitrary number of extra strings onto a growing
5255 (c) The code for expansion conditions now uses a table and a binary chop
5256 instead of a serial search (which was left over from when there were very
5257 few conditions). Also, it now recognizes conditions like "pam" even when
5258 the relevant support is not compiled in: a suitably worded error message is
5259 given if an attempt is made to use such a condition.
5261 11. Added ${time_interval:xxxxx}.
5263 12. A bug was causing one of the ddress fields not to be passed back correctly
5264 from remote delivery subprocesses. The field in question was not being
5265 subsequently used, so this caused to problems in practice.
5267 13. Added new log selectors queue_time and deliver_time.
5269 14. Might have fixed a bug in maildirsizefile handling that threw up
5270 "unexpected character" debug warnings, and recalculated the data
5271 unnecessarily. In any case, I expanded the warning message to give more
5274 15. Added the message "Restricted characters in address" to the statements in
5275 the default ACL that block characters like @ and % in local parts.
5277 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5278 Three changes have been made:
5280 (a) There was a serious bug; a negative response to MAIL caused the whole
5281 recipient domain to be cached as invalid, thereby blocking all messages
5282 to all local parts at the same domain, from all senders. This bug has
5283 been fixed. The domain is no longer cached after a negative response to
5284 MAIL if the sender used is not empty.
5286 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5289 (c) A new callout option, "use_sender" has been added for people who want
5290 the modified behaviour.
5296 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5299 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5300 indeed breaks things for older releases.
5302 3. Added additional logging to the case where there is a problem reading data
5303 from a filter that is running in a subprocess using a pipe, in order to
5304 try to track down a specific problem.
5306 4. Testing facility fudge: when running in the test harness and attempting
5307 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5308 getting "No route to host". Convert this to a timeout.
5310 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5313 6. Some OS don't have socklen_t but use size_t instead. This affects the
5314 fifth argument of getsockopt() amongst other things. This is now
5315 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5316 can be set for individual OS. I have set it for SunOS5, OSF1, and
5317 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5318 some earlier ones do not.
5320 7. Change 4.30/15 was not doing the test caselessly.
5322 8. The standard form for an IPv6 address literal was being rejected by address
5323 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5324 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5325 this, as well as the form without the "IPv6" on the front (but only when
5326 address literals are enabled, of course).
5328 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5330 10. Exim crashed if a message with an empty sender address specified by -f
5331 encountered a router with an errors_to setting. This could be provoked only
5332 by a command such as
5336 where an empty string was supplied; "<>" did not hit this bug.
5338 11. Installed PCRE release 4.5.
5340 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5341 remained set. It is now erased.
5343 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5344 times from message ids (which are base 36 rather than the normal 62).
5346 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5347 were being counted as actual protocol errors, and logged if the log
5348 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5349 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5350 and DATA following a set of rejected RCPTs do not count as protocol errors.
5351 In other words, Exim assumes they were pipelined, though this may not
5352 actually be the case. Of course, in all cases the client gets an
5353 appropriate error code.
5355 15. If a lookup fails in an ACL condition, a message about the failure may
5356 be available; it is used if testing the ACL cannot continue, because most
5357 such messages specify what the cause of the deferral is. However, some
5358 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5359 that caused an old message to be retained and used if a later statement
5360 caused a defer, replacing the real cause of the deferral.
5362 16. If an IP address had so many PTR records that the DNS lookup buffer
5363 was not large enough to hold them, Exim could crash while trying to process
5364 the truncated data. It now detects and logs this case.
5366 17. Further to 4.21/58, another change has been made: if (and only if) the
5367 first line of a message (the first header line) ends with CRLF, a bare LF
5368 in a subsequent header line has a space inserted after it, so as not to
5369 terminate the header.
5371 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5372 unnecessarily, used atoi() instead of strtol(), and didn't check the
5373 termination when getting file sizes from file names by regex.
5375 19. Completely re-implemented the support for maildirsize files, in the light
5376 of a number of problems with the previous contributed implementation
5377 (4.30/29). In particular:
5379 . If the quota is zero, the maildirsize file is maintained, but no quota is
5382 . If the maildir directory does not exist, it is created before any attempt
5383 to write a maildirsize file.
5385 . The quota value in the file is just a cache; if the quota is changed in
5386 the transport, the new value overrides.
5388 . A regular expression is available for excluding directories from the
5391 20. The autoreply transport checks the characters in options that define the
5392 message's headers; it allows continued headers, but it was checking with
5393 isspace() after an embedded newline instead of explicitly looking for a
5396 21. If all the "regular" hosts to which an address was routed had passed their
5397 expiry times, and had not reached their retry times, the address was
5398 bounced, even if fallback hosts were defined. Now Exim should go on to try
5401 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5402 equivalent code in the SMTP transport. Some hosts send humungous responses
5403 to HELO/EHLO, more than 1024 it seems.
5405 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5406 gives compiler warnings in some environments. I've now done it "properly",
5409 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5410 (because of problems with the built-in one) was declared to return uschar *
5411 instead of char *, causing compiler failure.
5413 25. Fixed a file descriptor leak when processing alias/forward files.
5415 26. Fixed a minor format string issue in dbfn.c.
5417 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5419 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5420 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5423 29. When a sender address is verified, it is cached, to save repeating the test
5424 when there is more than one recipient in a message. However, when the
5425 verification involves a callout, it is possible for different callout
5426 options to be set for different recipients. It is too complicated to keep
5427 track of this in the cache, so now Exim always runs a verification when a
5428 callout is required, relying on the callout cache for the optimization.
5429 The overhead is duplication of the address routing, but this should not be
5432 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5433 to be verified with callout=postmaster, and the main callout worked but the
5434 postmaster check failed, the verification correctly failed. However, if a
5435 subsequent RCPT command asked for sender verification *without* the
5436 postmaster check, incorrect caching caused this verification also to fail,
5439 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5440 it was not caching the DNS options (qualify_single, search_parents) that
5441 were used when the lookup failed. A subsequent lookup with different
5442 options therefore always gave the same answer, though there were cases
5443 where it should not have. (Example: a "domains = !$mx_any" option on a
5444 dnslookup router: the "domains" option is always processed without any
5445 widening, but the router might have qualify_single set.) Now Exim uses the
5446 cached value only when the same options are set.
5448 32. Added John Jetmore's "exipick" utility to the distribution.
5450 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5451 than a timeout (e.g. a certificate is required, and is not provided), an
5452 Exim server now closes the connection immediately. Previously it waited for
5453 the client to close - but if the client is SSL, it seems that they each
5454 wait for each other, leading to a delay before one of them times out.
5456 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5457 maintained 0.8.x compatibility because I don't think many are using it, and
5458 it is clearly obsolete.
5460 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5463 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5464 client certificate was expired. A simple patch fixes this, though I don't
5465 understand the full logic of why the verify callback is called multiple
5468 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5469 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5470 which causes problems with some clients (such as the Certicom SSL Plus
5471 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5472 disables the coutermeasure allowing Eudora to connect."
5474 38. Exim was not checking that a write() to a log file succeeded. This could
5475 lead to Bad Things if a log got too big, in particular if it hit a file
5476 size limit. Exim now panics and dies if it cannot write to a log file, just
5477 as it does if it cannot open a log file.
5479 39. Modified OS/Makefile-Linux so that it now contains
5481 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5483 The two -D definitions ensure that Exim is compiled with large file
5484 support, which makes it possible to handle log files that are bigger than
5487 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5488 instance) a domain was checked against a named list that involved a lookup,
5489 causing $domain_data to be set, then another domain was checked against the
5490 same list, then the first domain was re-checked, the value of $domain_data
5491 after the final check could be wrong. In particular, if the second check
5492 failed, it could be set empty. This bug probably also applied to
5495 41. The strip_trailing_dot option was not being applied to the address given
5496 with the -f command-line option.
5498 42. The code for reading a message's header from the spool was incrementing
5499 $received_count, but never initializing it. This meant that the value was
5500 incorrect (doubled) while delivering a message in the same process in which
5501 it was received. In the most common configuration of Exim, this never
5502 happens - a fresh exec is done - but it can happen when
5503 deliver_drop_privilege is set.
5505 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5506 it now includes up to 150 characters of the unexpected data in the log
5509 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5510 and building data strings. The size of both of these buffers was 10 000
5511 bytes - far larger than anybody would *ever* want, thought I. Needless to
5512 say, somebody hit the limit. I have increased the maximum line length to
5513 20 000 and the maximum data length of concatenated lines to 100 000. I have
5514 also fixed two bugs, because there was no checking on these buffers. Tsk,
5515 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5516 buffer is too small.
5518 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5519 lsearch lookups. Now it does.
5521 46. When parsing a route_list item in a manualroute router, a fixed-length
5522 buffer was used for the list of hosts. I made this 1024 bytes long,
5523 thinking that nobody would ever have a list of hosts that long. Wrong.
5524 Somebody had a whole pile of complicated expansion conditions, and the
5525 string was silently truncated, leading to an expansion error. It turns out
5526 that it is easier to change to an unlimited length (owing to other changes
5527 that have happened since this code was originally written) than to build
5528 structure for giving a limitation error. The length of the item that
5529 expands into the list of hosts is now unlimited.
5531 47. The lsearch lookup could not handle data where the length of text line was
5532 more than 4095 characters. Such lines were truncated, leading to shortened
5533 data being returned. It should now handle lines of any length.
5535 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5536 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5539 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5540 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5541 no longer happens in comment lines. A list of replacements is now placed
5542 at the head of all of the source files, except those whose only change is
5543 to replace PERL_COMMAND in the very first #! line.
5545 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5546 messages on the queue, with a bottom-up merge sort, using code contributed
5547 by Michael Haardt. This should make operations like -bp somewhat faster on
5548 large queues. It won't affect queue runners, except when queue_run_in_order
5551 51. Installed eximstats 1.31 in the distribution.
5553 52. Added support for SRV lookups to the dnslookup router.
5555 53. If an ACL referred to $message_body or $message_body_end, the value was not
5556 reset for any messages that followed in the same SMTP session.
5558 54. The store-handling optimization for building very long strings was not
5559 differentiating between the different store pools. I don't think this
5560 actually made any difference in practice, but I've tidied it.
5562 55. While running the routers to verify a sender address, $sender_address
5563 was still set to the sender address. This is wrong, because when routing to
5564 send a bounce to the sender, it would be empty. Therefore, I have changed
5565 it so that, while verifying a sender address, $sender_address is set to <>.
5566 (There is no change to what happens when verifying a recipient address.)
5568 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5569 target A or AAAA records (if not already returned) without resetting the
5570 qualify_single or search_parents options of the DNS resolver. These are
5571 inappropriate in this case because the targets of MX and SRV records must
5572 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5573 target that, when qualified, matched something in the local domain. These
5574 two options are now turned off when doing these lookups.
5576 57. It seems that at least some releases of Reiserfs (which does not have the
5577 concept of a fixed number of inodes) returns zero and not -1 for the
5578 number of available inodes. This interacted badly with check_spool_inodes,
5579 which assumed that -1 was the "no such thing" setting. What I have done is
5580 to check that the total number of inodes is greater than zero before doing
5581 the test of how many are available.
5583 58. When a "warn" ACL statement has a log_message modifier, the message is
5584 remembered, and not repeated. This is to avoid a lot of repetition when a
5585 message has many recipients that cause the same warning to be written.
5586 Howewer, Exim was preserving the list of already written lines for an
5587 entire SMTP session, which doesn't seem right. The memory is now reset if a
5588 new message is started.
5590 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5591 debugging output unless log_rewrite was also set.
5593 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5594 of (int)(handle) when we know that handle contains (void *)(-1).
5596 61. The Exim daemon panic-logs an error return when it closes the incoming
5597 connection. However "connection reset by peer" seems to be common, and
5598 isn't really an error worthy of noting specially, so that particular error
5601 62. When Exim is trying to find all the local interfaces, it used to panic and
5602 die if the ioctl to get the interface flags failed. However, it seems that
5603 on at least one OS (Solaris 9) it is possible to have an interface that is
5604 included in the list of interfaces, but for which you get a failure error
5605 for this call. This happens when the interface is not "plumbed" into a
5606 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5607 failure of the "get flags" call assumes that the interface is down.
5609 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5610 makes life easier for people who are doing arithmetic on fields extracted
5611 from dates, where you often get leading zeros that should not be
5612 interpreted as octal.
5614 64. Added qualify_domain to the redirect router, to override the global
5617 65. If a pathologically long header line contained very many addresses (the
5618 report of this problem mentioned 10 000) and each of them was rewritten,
5619 Exim could use up a very large amount of memory. (It kept on making new
5620 copies of the header line as it rewrote, and never released the old ones.)
5621 At the expense of a bit more processing, the header rewriting function has
5622 been changed so that it no longer eats memory in this way.
5624 66. The generation of the Received: header has been moved from the time that a
5625 message starts to be received, to the time that it finishes. The timestamp
5626 in the Received: header should now be very close to that of the <= log
5627 line. There are two side-effects of this change:
5629 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5630 logged header lines no longer include the local Received: line, because
5631 it has not yet been created. The same applies to a copy of the message
5632 that is returned to a non-SMTP sender when a message is rejected.
5634 (b) When a filter file is tested using -bf, no additional Received: header
5635 is added to the test message. After some thought, I decided that this
5638 This change does not affect the value of $received_for. It is still set
5639 after address rewriting, but before local_scan() is called.
5641 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5643 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5644 gave an unhelpful panic error message, and a defer error. I have managed to
5645 change this behaviour so that it now rejects any supplied certificate,
5646 which seems right, as the list of acceptable certificates is empty.
5648 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5649 gave an unhelpful defer error. I have not managed to make this reject any
5650 supplied certificates, but the error message it gives is "no certificate
5651 supplied", which is not helpful.
5653 70. exigrep's output now also includes lines that are not associated with any
5654 message, but which match the given pattern. Implemented by a patch from
5655 Martin Sluka, which also tidied up the Perl a bit.
5657 71. Recipient callout verification, like sender verification, was using <> in
5658 the MAIL FROM command. This isn't really the right thing, since the actual
5659 sender may affect whether the remote host accepts the recipient or not. I
5660 have changed it to use the actual sender in the callout; this means that
5661 the cache record is now keyed on a recipient/sender pair, not just the
5662 recipient address. There doesn't seem to be a real danger of callout loops,
5663 since a callout by the remote host to check the sender would use <>.
5664 [SEE ABOVE: changed after hitting problems.]
5666 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5667 temporary errors. However, in the case of such a code being given after
5668 the end of a data transmission (i.e. after ".") Exim was failing to write
5669 a retry record for the message. (Yes, there was some broken host that was
5670 actually sending 8xx at this point.)
5672 73. An unknown lookup type in a host list could cause Exim to panic-die when
5673 the list was checked. (An example that provoked this was putting <; in the
5674 middle of a list instead of at the start.) If this happened during a DATA
5675 ACL check, a -D file could be left lying around. This kind of configuration
5676 error no longer causes Exim to die; instead it causes a defer errror. The
5677 incident is still logged to the main and panic logs.
5679 74. Buglet left over from Exim 3 conversion. The message "too many messages
5680 in one connection" was written to the rejectlog but not the mainlog, except
5681 when address rewriting (yes!) was being logged.
5683 75. Added write_rejectlog option.
5685 76. When a system filter was run not as root (that is, when system_filter_user
5686 was set), the values of the $n variables were not being returned to the
5687 main process; thus, they were not subsequently available in the $sn
5690 77. Added +return_path_on_delivery log selector.
5692 78. A connection timeout was being treated differently from recipients deferred
5693 when testing hosts_max_try with a message that was older than the host's
5694 retry timeout. (The host should not be counted, thus allowing all hosts to
5695 be tried at least once before bouncing.) This may have been the cause of an
5696 occasionally reported bug whereby a message would remain on the queue
5697 longer than the retry timeout, but would be bounced if a delivery was
5698 forced. I say "may" because I never totally pinned down the problem;
5699 setting up timeout/retry tests is difficult. See also the next item.
5701 79. The ultimate address timeout was not being applied to errors that involved
5702 a combination of host plus message (for example, a timeout on a MAIL
5703 command). When an address resolved to a number of possible hosts, and they
5704 were not all tried for each delivery (e.g. because of hosts_max_try), a
5705 message could remain on the queue longer than the retry timeout.
5707 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5710 81. Fixed an obscure SMTP outgoing bug which required at least the following
5711 conditions: (a) there was another message waiting for the same server;
5712 (b) the server returned 5xx to all RCPT commands in the first message so
5713 that the message was not completed; (c) the server dropped the connection
5714 or gave a negative response to the RSET that Exim sends to abort the
5715 transaction. The observed case was a dropped connection after DATA that had
5716 been sent in pipelining mode. That is, the server had advertised PIPELINING
5717 but was not implementing it correctly. The effect of the bug was incorrect
5718 behaviour, such as trying another host, and this could lead to a crash.
5724 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5725 and daemon.c were passed as pointers to ints; they should have been
5726 pointers to socklen_t variables (which are typically unsigned ints).
5728 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5731 3. Fixed a really odd bug that affected only the testing scheme; patching a
5732 certain fixed string in the binary changed the value of another string that
5733 happened to be identical to the end of the original first string.
5735 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5736 name", it returns that address as the IP address. On some operating
5737 systems (e.g. Solaris), it also passes back the IP address string as the
5738 "host name". However, on others (e.g. Linux), it passes back an empty
5739 string. Exim wasn't checking for this, and was changing the host name to an
5740 empty string, assuming it had been canonicized.
5742 5. Although rare, it is permitted to have more than one PTR record for a given
5743 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5744 all the names associated with an address, because they do in Solaris.
5745 However, it seems that they do not in Linux for data that comes from the
5746 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5747 I found this out when I moved to a new Linux workstation and tried to run
5748 the Exim test suite.
5750 To get round this problem I have changed the code so that it now does its
5751 own call to the DNS to look up PTR records when searching for a host name.
5752 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5753 addresses that are only in /etc/hosts are still found.
5755 This behaviour is, however, controlled by an option called host_lookup_
5756 order, which defaults to "bydns:byaddr". If people want to use the other
5757 order, or indeed, just use one or the other means of lookup, they can
5758 specify it in this variable.
5760 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5761 some operating systems, this comes back from gethostbyaddr() as an empty
5762 string, and this is what Exim used to test for. However, it seems that in
5763 other systems, "." is yielded. Exim now tests for this case too.
5765 7. The values of check_spool_space and check_log_space are now held internally
5766 as a number of kilobytes instead of an absolute number of bytes. If a
5767 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5768 kilobyte. This means that much larger values can be stored.
5770 8. Exim monitor: an attempt to get the action menu when not actually pointing
5771 at a message produces an empty menu entitled "No message selected". This
5772 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5773 no entries in it ("Shell widget menu has zero width and/or height"). So I
5774 have added a single, blank menu entry in this case.
5776 9. Added ${quote_local_part.
5778 10. MIME decoding is now applied to the contents of Subject: header lines when
5781 11. Now that a reference to $sender_host_address automatically causes a reverse
5782 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5783 host lookup before query-style lookups in lists that might use this
5784 variable. This has therefore been abolished, and the "net-" prefix is no
5785 longer necessary for query-style lookups.
5787 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5788 have been a typo for LFLAGS, so it has been changed.
5790 13. The install script calls Exim with "-C /dev/null" in order to find the
5791 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5792 to be output. Howeve, since Exim outputs its version number before the
5793 error, it didn't break the script. It just looked ugly. I fixed this by
5794 always allowing "-C /dev/null" if the caller is root.
5796 14. Ignore overlarge ACL variable number when reading spool file - insurance
5797 against a later release with more variables having written the file.
5799 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5800 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5801 this, as well as the form without the "IPv6" on the front.
5803 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5804 OS/Makefile-Darwin file.
5806 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5807 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5809 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5810 variable. However, some OS use ints for inodes. I've added cast to long int
5811 to get rid of the compiler warning.
5813 19. I had forgotten to lock out "/../" in configuration file names when
5814 ALT_CONFIG_PREFIX was set.
5816 20. Routers used for verification do not need to specify transports. However,
5817 if such a router generated a host list, and callout was configured, Exim
5818 crashed, because it could not find a port number from the (non-existent)
5819 transport. It now assumes port 25 in this circumstance.
5821 21. Added the -t option to exigrep.
5823 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5824 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5825 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5826 them is set, LOOKUP_LSEARCH is forced.
5828 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5830 24. Added sender and host information to the "rejected by local_scan()" log
5831 line; previously there was no indication of these.
5833 25. Added .include_if_exists.
5835 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5836 Linux. It turns out that not all file systems support this. Apparently some
5837 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5838 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5839 not supported on the file descriptor, is now ignored when Exim is trying to
5840 sync a directory. This applies only to Linux.
5842 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5844 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5845 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5848 29. Added support for maildirsize files from supplied patch (modified a bit).
5850 30. The use of :fail: followed by an empty string could lead Exim to respond to
5851 sender verification failures with (e.g.):
5853 550 Verification failed for <xxx>
5854 550 Sender verify failed
5856 where the first response line was missing the '-' that indicates it is not
5857 the final line of the response.
5859 31. The loop for finding the name of the user that called Exim had a hardwired
5860 limit of 10; it now uses the value of finduser_retries, which is used for
5861 all other user lookups.
5863 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5866 33. Exim was neglecting to zero errno before one call of strtol() when
5867 expanding a string and expecting an integer value. On some systems this
5868 resulted in spurious "integer overflow" errors. Also, it was casting the
5869 result into an int without checking.
5871 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5872 did not work. The code looks as if it has *never* worked, though it appears
5873 to have been documented since at least releast 1.62. I have made it work.
5875 35. The "timeout_DNS" error in retry rules, also documented since at least
5876 1.62, also never worked. As it isn't clear exactly what this means, and
5877 clearly it isn't a major issue, I have abolished the feature by treating it
5878 as "timeout", and writing a warning to the main and panic logs.
5880 36. The display of retry rules for -brt wasn't always showing the error code
5883 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5884 timeout_connect_A, timeout_connect_MX.
5886 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5887 to the empty sender.
5889 39. The daemon was not analysing the content of -oX till after it had closed
5890 stderr and disconnected from the controlling terminal. This meant that any
5891 syntax errors were only noted on the panic log, and the return code from
5892 the command was 0. By re-arranging the code a little, I've made the
5893 decoding happen first, so such errors now appear on stderr, and the return
5894 code is 1. However, the actual setting up of the sockets still happens in
5895 the disconnected process, so errors there are still only recorded on the
5898 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5899 connections (as happens on some IP stacks) was logged at start up time as
5900 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5901 it from "IPv6 and IPv4", which means that two separate sockets are being
5904 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5905 says whether AF_INET or AF_INET6 was passed as an argument.
5907 42. Exiwhat output was messed up when time zones were included in log
5910 43. Exiwhat now gives more information about the daemon's listening ports,
5911 and whether -tls-on-connect was used.
5913 44. The "port" option of the smtp transport is now expanded.
5915 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5916 silently ignored. Now an error message is written to the main and panic
5919 46. There's a new ACL modifier called "logwrite" which writes to a log file
5920 as soon as it is encountered.
5922 47. Added $local_user_uid and $local_user_gid at routing time.
5924 48. Exim crashed when trying to verify a sender address that was being
5927 49. Exim was recognizing only a space character after ".include". It now also
5928 recognizes a tab character.
5930 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5931 extracting the relevant information from the specification. The man page no
5932 longer contains scrambled data for the -d option, and I've added a section
5933 at the front about calling Exim under different names.
5935 51. Added "extra_headers" argument to the "mail" command in filter files.
5937 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5940 53. Installed eximstats 1.29.
5942 54. Added transport_filter_timeout as a generic transport option.
5944 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5945 Cc: header lines. This was required by RFC 822, but it not required by RFC
5948 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5949 incoming messages that did not have them. Now it does so only if the
5950 message originates locally, that is, if there is no associated remote host
5951 address. When Resent- header lines are present, this applies to the Resent-
5952 lines rather than the non-Resent- lines.
5954 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5955 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5957 58. Messages for configuration errors now include the name of the main
5958 configuration file - useful now that there may be more than one file in a
5959 list (.included file names were always shown).
5961 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5962 for those rare installations that do not start the daemon as root or run it
5963 setuid root. I've cut out the call to initgroups() if the daemon is not
5966 60. The Exim user and group can now be bound into the binary as text strings
5967 that are looked up at the start of Exim's processing.
5969 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5971 62. Added $mailstore_basename variable.
5973 63. Installed patch to sieve.c from Michael Haardt.
5975 64. When Exim failed to open the panic log after failing to open the main log,
5976 the original message it was trying to log was written to stderr and debug
5977 output, but if they were not available (the usual case in production), it
5978 was lost. Now it is written to syslog before the two lines that record the
5979 failures to open the logs.
5981 65. Users' Exim filters run in subprocesses under the user's uid. It is
5982 possible for a "deliver" command or an alias in a "personal" command to
5983 provoke an address rewrite. If logging of address rewriting is configured,
5984 this fails because the process is not running as root or exim. There may be
5985 a better way of dealing with this, but for the moment (because 4.30 needs
5986 to be released), I have disabled address rewrite logging when running a
5987 filter in a non-root, non-exim process.
5993 1. The buildconfig auxiliary program wasn't quoting the value set for
5994 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5995 not defined. This bug was masked in 4.22 by the effect that was fixed in
5998 2. Some messages that were rejected after a message id was allocated were
5999 shown as "incomplete" by exigrep. It no longer does this for messages that
6000 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6002 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6003 have allow_domain_literals set, the ID did not get logged in the <= line.
6004 Domain literals are now always recognized in Message-ID: header lines.
6006 4. The first argument for a ${extract expansion item is the key name or field
6007 number. Leading and trailing spaces in this item were not being ignored,
6008 causing some misleading effects.
6010 5. When deliver_drop_privilege was set, single queue runner processes started
6011 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6012 same command in the process it spins off) were not dropping privilege.
6014 6. When the daemon running as "exim" started a queue runner, it always
6015 re-executed Exim in the spun-off process. This is a waste of effort when
6016 deliver_drop_privilege is set. The new process now just calls the
6017 queue-runner function directly.
6023 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6026 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6027 ignored. Though the use of -oP was forcing the writing of a pid file, it
6028 was always written to the default place.
6030 3. If the message "no IP address found for host xxxx" is generated during
6031 incoming verification, it is now followed by identification of the incoming
6032 connection (so you can more easily find what provoked it).
6034 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6036 5. Added some features to "harden" Exim a bit more against certain attacks:
6038 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6039 be put in Local/Makefile. This is like the never_users runtime option,
6040 but it cannot be overridden. The default setting is "root".
6042 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6043 prefix string with which any file named in a -C command line option
6046 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6047 is retained for -C and -D only if the caller of Exim is root. Without
6048 it, the exim user may also use -C and -D and retain privilege.
6050 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6051 command line option is disabled.
6053 6. Macro names set by the -D option must start with an upper case letter, just
6054 like macro names defined in the configuration file.
6056 7. Added "dereference=" facility to LDAP.
6058 8. Two instances of the typo "uknown" in the source files are fixed.
6060 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6061 the Configure-Makefile script screwed up while processing it.
6063 10. Incorporated PCRE 4.4.
6065 11. The SMTP synchronization check was not operating right at the start of an
6066 SMTP session. For example, it could not catch a HELO sent before the client
6067 waited for the greeting. There is now a check for outstanding input at the
6068 point when the greeting is written. Because of the duplex, asynchronous
6069 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6070 way, but not yet received, when the check is performed.
6072 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6073 on TCP/IP sockets, because this apparently causes some broken clients to
6076 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6077 unchanged) from the Cygwin maintainer.
6079 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6080 was supported instead of testing for mbx. Effectively a typo.
6082 15. The spa authenticator server code was not checking that the input it
6083 received was valid base64.
6085 16. The debug output line for the "set" modifier in ACLs was not showing the
6086 name of the variable that was being set.
6088 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6090 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6091 lookup on its own. Something else was needed to trigger the lookup. For
6092 example, a match in host_lookup or the need for a host name in a host list.
6093 Now, if $sender_host_name is referenced and the host name has not yet been
6094 looked up, a lookup is performed. If the lookup fails, the variable remains
6095 empty, and $host_lookup_failed is set to "1".
6097 19. Added "eqi" as a case-independent comparison operator.
6099 20. The saslauthd authentication condition could segfault if neither service
6100 nor realm was specified.
6102 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6103 error message that was logged was misleading, and incoming SMTP
6104 connections were dropped. The message is now more accurate, and temporary
6105 errors are given to SMTP connections.
6107 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6108 (except RSET) with a 421 error, until QUIT is received. However, it was
6109 failing to send a response to QUIT.
6111 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6112 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6113 ACL is now run after the helo_try_verify_hosts code.
6115 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6116 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6117 case-independent, so other case variants are also recognized). Apparently
6118 some systems use these upper case variants.
6120 25. If more than two messages were waiting for the same host, and a transport
6121 filter was specified for the transport, Exim sent two messages over the
6122 same TCP/IP connection, and then failed with "socket operation on non-
6123 socket" when it tried to send the third.
6125 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6127 27. The extern definition of crypt16() in expand.c was not being excluded when
6128 the OS had its own crypt16() function.
6130 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6131 as a preferred synonym for return_size_limit, both as an option and as an
6134 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6136 30. Changed the default configuration ACL to relax the local part checking rule
6137 for addresses that are not in any local domains. For these addresses,
6138 slashes and pipe symbols are allowed within local parts, but the sequence
6139 /../ is explicitly forbidden.
6141 31. SPA server authentication was not clearing the challenge buffer before
6144 32. log_message in a "warn" ACL statement was writing to the reject log as
6145 well as to the main log, which contradicts the documentation and doesn't
6146 seem right (because no rejection is happening). So I have stopped it.
6148 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6149 However, I am unable to do any testing of this.
6151 34. Fixed an infelicity in the appendfile transport. When checking directories
6152 for a mailbox, to see if any needed to be created, it was accidentally
6153 using path names with one or more superfluous leading slashes; tracing
6154 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6156 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6157 contents are added to the log line that is written for every discarded
6158 recipient. (Previously a log_message setting was ignored.)
6160 36. The ${quote: operator now quotes the string if it is empty.
6162 37. The install script runs exim in order to find its version number. If for
6163 some reason other than non-existence or emptiness, which it checks, it
6164 could not run './exim', it was installing it with an empty version number,
6165 i.e. as "exim-". This error state is now caught, and the installation is
6168 38. An argument was missing from the function that creates an error message
6169 when Exim fails to connect to the socket for saslauthd authentication.
6170 This could cause Exim to crash, or give a corrupted message.
6172 39. Added isip, isip4, and isip6 to ${if conditions.
6174 40. The ACL variables $acl_xx are now saved with the message, and can be
6175 accessed later in routers, transports, and filters.
6177 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6178 strings in the file are not string-expanded.
6180 42. If a MAIL command specified a SIZE value that was too large to fit into an
6181 int variable, the check against message_size_limit failed. Such values are
6182 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6183 day this will have to be increased, but I don't think I want to be around
6184 when emails are that large.
6191 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6192 iconv() is not standard in FreeBSD.
6194 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6195 IPv6 enabled. The observed symptom was a segmentation fault on return from
6196 the function os_common_find_running_interfaces() in src/os.c.
6198 3. In the check_special_case() function in daemon.c I had used "errno" as an
6199 argument name, which causes warnings on some systems. This was basically a
6200 typo, since it was named "eno" in the comments!
6202 4. The code that waits for the clock to tick (at a resolution of some fraction
6203 of a second) so as to ensure message-id uniqueness was always waiting for
6204 at least one whole tick, when it could have waited for less. [This is
6205 almost certainly not relevant at current processor speeds, where it is
6206 unlikely to ever wait at all. But we try to future-proof.]
6208 5. The function that sleeps for a time interval that includes fractions of a
6209 second contained a race. It did not block SIGALRM between setting the
6210 timer, and suspending (a couple of lines later). If the interval was short
6211 and the sigsuspend() was delayed until after it had expired, the suspension
6212 never ended. On busy systems this could lead to processes getting stuck for
6215 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6216 process, before it forks any delivery processes. The open lookup caching
6217 mechanism meant that the open file or database connection was passed into
6218 the delivery process. The problem was that delivery processes always tidy
6219 up cached lookup data. This could cause a problem for the next delivery
6220 process started by the queue runner, because the external queue runner
6221 process does not know about the closure. So the next delivery process
6222 still has data in the lookup cache. In the case of a file lookup, there was
6223 no problem because closing a file descriptor in a subprocess doesn't affect
6224 the parent. However, if the lookup was caching a connection to a database,
6225 the connection was closed, and the second delivery process was likely to
6226 see errors such as "PGSQL: query failed: server closed the connection
6227 unexpectedly". The problem has been fixed by closing all cached lookups
6228 in a queue runner before running a delivery process.
6230 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6231 seem to have the "const" qualifier which it has on other OS. I've
6234 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6235 *of the same type* (client or server) with the same public name that an
6236 error should be diagnosed.
6238 9. When Exim looked up a host name for an IP address, but failed to find the
6239 original IP address when looking up the host name (a safety check), it
6240 output the message "<ip address> does not match any IP for NULL", which was
6241 confusing, to say the least. The bug was that the host name should have
6242 appeared instead of "NULL".
6244 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6245 user that is built into the binary, and the -C or -D options is used, root
6246 privilege is dropped before the configuration file is read. In addition,
6247 logging is switched to stderr instead of the normal log files. If the
6248 configuration then re-defines the Exim user, the unprivileged environment
6249 is probably not what is expected, so Exim logs a panic warning message (but
6252 However, if deliver_drop_privilege is set, the unprivileged state may well
6253 be exactly what is intended, so the warning has been cut out in that case,
6254 and Exim is allowed to try to write to its normal log files.
6260 1. smtp_return_error_details was not giving details for temporary sender
6261 or receiver verification errors.
6263 2. Diagnose a configuration error if two authenticators have the same public
6266 3. Exim used not to create the message log file for a message until the first
6267 delivery attempt. This could be confusing when incoming messages were held
6268 for policy or load reasons. The message log file is now created at the time
6269 the message is received, and an initial "Received" line is written to it.
6271 4. The automatically generated man page for command line options had a minor
6272 bug that caused no ill effects; however, a more serious problem was that
6273 the procedure for building the man page automatically didn't always
6274 operate. Consequently, release 4.20 contains an out-of-date version. This
6275 shouldn't happen again.
6277 5. When building Exim with embedded Perl support, the script that builds the
6278 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6279 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6281 6. The freeze_tell option was not being used for messages that were frozen on
6282 arrival, either by an ACL or by local_scan().
6284 7. Added the smtp_incomplete_transaction log selector.
6286 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6287 was accepting AUTH without a new EHLO.
6289 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6290 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6293 10. Logging of TCP/IP connections (when configured) now happens in the main
6294 daemon process instead of the child process, so that the TCP/IP connection
6295 count is more accurate (but it can never be perfect).
6297 11. The use of "drop" in a nested ACL was not being handled correctly in the
6298 outer ACL. Now, if condition failure induced by the nested "drop" causes
6299 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6300 or "require"), the connection is dropped.
6302 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6303 that yield "discard" can now be used with an "accept" or a "discard" verb,
6304 but an error is generated for any others (because I can't see a useful way
6305 to define what should happen).
6307 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6308 are now processed in the same way as lines in the Exim configuration file.
6309 In particular, continuation lines are supported.
6311 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6313 15. Added -ti meaning -t -i.
6315 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6316 domains, and warn by logging if others are found.
6318 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
6319 returned from GIFCONF when Exim is trying to find the list of interfaces on
6320 a host. The code in os.c has been modified to copy each ifreq to an aligned
6321 structure in all cases.
6323 Also, in some cases, the returned ifreq's were being copied to a 'struct
6324 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6325 means the last couple of bytes of an IPv6 address could be chopped if the
6326 ifreq contained only a normal sockaddr (14 bytes storage).
6328 18. Named domain lists were not supported in the hosts_treat_as_local option.
6329 An entry such as +xxxx was not recognized, and was treated as a literal
6332 19. Ensure that header lines added by a DATA ACL are included in the reject log
6333 if the ACL subsequently rejects the message.
6335 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6336 MD5 (which is deprecated).
6338 21. When testing a filter file using -bf, Exim was writing a message when it
6339 took the sender from a "From " line in the message, but it was not doing so
6340 when it took $return_path from a Return-Path: header line. It now does.
6342 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6343 with a valid header line field name (a series of printing characters
6344 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6346 23. Changed "disc" in the source to "disk" to conform to the documentation and
6347 the book and for uniformity.
6349 24. Ignore Sendmail's -Ooption=value command line item.
6351 25. When execve() failed while trying to run a command in a pipe transport,
6352 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
6353 could be confused with a return value of 69 from the command itself. This
6354 has been changed to 127, the value the shell returns if it is asked to run
6355 a non-existent command. The wording for the related log line suggests a
6356 non-existent command as the problem.
6358 26. If received_header_text expands to an empty string, do not add a Received:
6359 header line to the message. (Well, it adds a token one on the spool, but
6360 marks it "old" so that it doesn't get used or transmitted.)
6362 27. Installed eximstats 1.28 (addition of -nt option).
6364 28. There was no check for failure on the call to getsockname() in the daemon
6365 code. This can fail if there is a shortage of resources on the system, with
6366 ENOMEM, for example. A temporary error is now given on failure.
6368 29. Contrary to the C standard, it seems that in some environments, the
6369 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6370 program. Exim now does this explicitly; it affects the formatting of
6371 timestamps using strftime().
6373 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6374 complaints. I've now initialized all the variables, to avoid this.
6376 32. Header lines added by a system filter were not being "seen" during
6377 transport-time rewrites.
6379 33. The info_callback() function passed to OpenSSL is set up with type void
6380 (*)(SSL *, int, int), as described somewhere. However, when calling the
6381 function (actually a macro) that sets it up, the type void(*)() is
6382 expected. I've put in a cast to prevent warnings from picky compilers.
6384 34. If a DNS black list lookup found a CNAME record, but there were no A
6385 records associated with the domain it pointed at, Exim crashed.
6387 35. If a DNS black list lookup returned more than one A record, Exim ignored
6388 all but the first. It now scans all returned addresses if a particular IP
6389 value is being sought. In this situation, the contents of the
6390 $dnslist_value variable are a list of all the addresses, separated by a
6393 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6394 to accept a host name and all its aliases if the forward lookup for any of
6395 them yielded the IP address of the incoming connection. Now it accepts only
6396 those names whose forward lookup yields the correct IP address. Any other
6397 names are discarded. This closes a loophole whereby a rogue DNS
6398 administrator could create reverse DNS records to break through a
6399 wildcarded host restriction in an ACL.
6401 37. If a user filter or a system filter that ran in a subprocess used any of
6402 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6403 the wrong values were passed to the pipe command ($thisaddress had the
6404 value of $0, $0 had the value of $1, etc). This bug was introduced by
6405 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6407 38. Improved the line breaking for long SMTP error messages from ACLs.
6408 Previously, if there was no break point between 40 and 75 characters, Exim
6409 left the rest of the message alone. Two changes have been made: (a) I've
6410 reduced the minimum length to 35 characters; (b) if it can't find a break
6411 point between 35 and 75 characters, it looks ahead and uses the first one
6412 that it finds. This may give the occasional overlong line, but at least the
6413 remaining text gets split now.
6415 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6416 file descriptors might be low, and that setting 1000 would always raise it.
6417 It turns out that in some environments, the limit is already over 1000 and
6418 that lowering it causes trouble. So now Exim takes care not to decrease it.
6420 40. When delivering a message, the value of $return_path is set to $sender_
6421 address at the start of routing (routers may change the value). By an
6422 oversight, this default was not being set up when an address was tested by
6423 -bt or -bv, which affected the outcome if any router or filter referred to
6426 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6427 log only when "message" or "log_message" are set. However, if one of the
6428 conditions was an address verification, or a call to a nested ACL, the
6429 messages generated by the underlying test were being passed through. This
6430 no longer happens. The underlying message is available in $acl_verify_
6431 message for both "message" and "log_message" expansions, so it can be
6432 passed through if needed.
6434 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6435 new expansion $bh_ to give the encoded byte string without charset
6436 translation. Translation happens only if iconv() is available; HAVE_ICONV
6437 indicates this at build time. HEADERS_CHARSET gives the charset to
6438 translate to; headers_charset can change it in the configuration, and
6439 "headers charset" can change it in an individual filter file.
6441 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6442 that creates RFC 2047 encoded "words" labels them as that charset instead
6443 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6444 expansion operator; (ii) when Exim creates a From: line for a local
6445 message; (iii) when a header line is rewritten to include a "phrase" part.
6447 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6448 buggy, causing it to skip the first lines of messages whose message ID
6449 ended in 'D'. This would not have bitten before Exim release 4.14, because
6450 message IDs were unlikely to end in 'D' before then. The effect was to have
6451 incorrect size information for certain domains.
6453 45. #include "config.h" was missing at the start of the crypt16.c module. This
6454 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6457 46. If there was a timeout during a "random" callout check, Exim treated it as
6458 a failure of the random address, and carried on sending RSET and the real
6459 address. If the delay was just some slowness somewhere, the response to the
6460 original RCPT would be taken as a response to RSET and so on, causing
6461 mayhem of various kinds.
6463 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6464 when I implemented it. It didn't allow for the fact that some option values
6465 may legitimatetly be negative (e.g. size_addition), and it didn't even do
6466 the right test for positive values.
6468 48. Domain names in DNS records are case-independent. Exim always looks them up
6469 in lower case. Some resolvers return domain names in exactly the case they
6470 appear in the zone file, that is, they may contain uppercase letters. Not
6471 all resolvers do this - some return always lower case. Exim was treating a
6472 change of case by a resolver as a change of domain, similar to a widening
6473 of a domain abbreviation. This triggered its re-routing code and so it was
6474 trying to route what was effectively the same domain again. This normally
6475 caused routing to fail (because the router wouldn't handle the domain
6476 twice). Now Exim checks for this case specially, and just changes the
6477 casing of the domain that it ultimately uses when it transmits the message
6480 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6483 50. If a filter generated a file delivery with a non-absolute name (possible if
6484 no home directory exists for the router), the forbid_file option was not
6487 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6488 the existing equality matching.
6490 52. Exim was using ints instead of ino_t variables in some places where it was
6491 dealing with inode numbers.
6493 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6494 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6495 called TMPDIR, and if it finds it is different, it changes its value.
6497 54. The smtp_printf() function is now made available to local_scan() so
6498 additional output lines can be written before returning. There is also an
6499 smtp_fflush() function to enable the detection of a dropped connection.
6500 The variables smtp_input and smtp_batched_input are exported to
6503 55. Changed the default runtime configuration: the message "Unknown user"
6504 has been removed from the ACL, and instead placed on the localuser router,
6505 using the cannot_route_message feature. This means that any verification
6506 failures that generate their own messages won't get overridden. Similarly,
6507 the "Unrouteable address" message that was in the ACL for unverifiable
6508 relay addresses has also been removed.
6510 56. Added hosts_avoid_esmtp to the smtp transport.
6512 57. The exicyclog script was not checking for the esoteric option
6513 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6514 will work only if exicyclog is run under the appropriate euid.
6516 58. Following a discussion on the list, the rules by which Exim recognises line
6517 endings on incoming messages have been changed. The -dropcr and drop_cr
6518 options are now no-ops, retained only for backwards compatibility. The
6519 following line terminators are recognized: LF CRLF CR. However, special
6520 processing applies to CR:
6522 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6523 nor a local message in the state where . is a terminator.
6525 (ii) If a bare CR is encountered in a header line, an extra space is added
6526 after the line terminator so as not to end the header. The reasoning
6527 behind this is that bare CRs in header lines are most likely either
6528 to be mistakes, or people trying to play silly games.
6530 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6531 was being incorrectly given as 18 bytes larger than it should have been.
6532 This is a VOB (very old bug).
6534 60. This may never have affected anything current, but just in case it has:
6535 When the local host is found other than at the start of a list of hosts,
6536 the local host, those with the same MX, and any that follow, are discarded.
6537 When the list in question was part of a longer list of hosts, the following
6538 hosts (not currently being processed) were also being discarded. This no
6539 longer happens. I'm not sure if this situation could ever has previously
6542 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6545 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6546 header. This is something that is recommended in a new Internet Draft, and
6547 is something that is documented as being done by Sendmail. There are two
6548 possible values. For messages generated by the autoreply transport, Exim
6551 Auto-Submitted: auto-replied
6553 whereas for all other generated messages (e.g. bounces) it adds
6555 Auto-Submitted: auto-generated
6557 63. The "personal" condition in filters now includes a test for the
6558 Auto-Submitted: header. If it contains the string "auto-" the message it
6559 not considered personal.
6561 64. Added rcpt_include_affixes as a generic transport option.
6563 65. Added queue_only_override (default true).
6565 66. Added the syslog_duplication option.
6567 67. If what should have been the first header line of a message consisted of
6568 a space followed by a colon, Exim was mis-interpreting it as a header line.
6569 It isn't of course - it is syntactically invalid and should therefore be
6570 treated as the start of the message body. The misbehaviour could have
6571 caused a number of strange effects, including loss of data in subsequent
6572 header lines, and spool format errors.
6574 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6575 client host had authenticated. This control can now be exercised by an ACL
6576 for more flexibility.
6578 69. By default, callouts do not happen when testing with -bh. There is now a
6579 variant, -bhc, which does actually run the callout code, including
6580 consulting and updating the callout cache.
6582 70. Added support for saslauthd authentication, courtesy of Alexander
6585 71. If statvfs() failed on the spool or log directories while checking their
6586 size for availability, Exim confusingly gave the error "space shortage".
6587 Furthermore, in debugging mode it crashed with a floating point exception.
6588 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6589 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6590 serious problem, Exim now writes to the main and panic logs when this
6591 happens, with details of the failure. It then refuses to accept the
6592 incoming message, giving the message "spool directory problem" or "log
6593 directory problem" with a 421 code for SMTP messages.
6595 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6596 0, 1, and 2 exist, because some OS complain for execs without them (see
6597 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6598 descriptors. However, the code omitted to check that the open succeeded,
6599 causing mysterious errors if for some reason the permissions on /dev/null
6600 got screwed. Now Exim writes a message to the main and panic logs, and
6601 bombs out if it can't open /dev/null.
6603 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6604 interact so that it is all more flexible. It is supposed to remain
6605 backwards compatible. Also added extra_local_interfaces.
6607 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6608 to bomb out with an assertion failure - to the client this appears as a
6609 connection drop. This problem occurs in the part of the code that was taken
6610 from the Samba project. Fortunately, the assertion is in a very simple
6611 function, so I have fixed this by reproducing the function inline in the
6612 one place where it is called, and arranging for authentication to fail
6613 instead of killing the process with assert().
6615 75. The SPA client code was not working when the server requested OEM rather
6616 than Unicode encoding.
6618 76. Added code to make require_files with a specific uid setting more usable in
6619 the case where statting the file as root fails - usually a non-root-mounted
6620 NFS file system. When this happens and the failure is EACCES, Exim now
6621 forks a subprocess and does the per-uid checking as the relevant uid.
6623 77. Added process_log_path.
6625 78. If log_file_path was not explicitly set, a setting of check_log_space or
6626 check_log_inodes was ignored.
6628 79. If a space check for the spool or log partitions fails, the incident is now
6629 logged. Of course, in the latter case the data may get lost...
6631 80. Added the %p formatting code to string_format() so that it can be used to
6632 print addresses in debug_print(). Adjusted all the address printing in the
6633 debugging in store.c to use %p rather than %d.
6635 81. There was a concern that a line of code in smtp_in.c could overflow a
6636 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6637 initially expressed, the concern was not well-founded, because trailing
6638 spaces are removed early. However, if the trailing spaces were followed by
6639 a NULL, they did not get removed, so the overflow was possible. Two fixes
6642 (a) I re-wrote the offending code in a cleaner fashion.
6643 (b) If an incoming SMTP command contains a NULL character, it is rejected
6646 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6647 runs initgroups(), so that if the Exim user is in any additional groups,
6648 they will be used during message reception.
6654 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob