1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/01 Rework error string handling in TLS interface so that the caller in
12 more cases is responsible for logging. This permits library-sourced
13 string to be attached to addresses during delivery, and collapses
14 pairs of long lines into single ones.
20 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
21 than -2003 did; needs libidn2 in addition to libidn.
23 JH/02 The path option on a pipe transport is now expanded before use.
25 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
26 Patch provided by "Björn", documentation fix added too.
28 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
29 missing a wire-to-host endian conversion.
31 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
32 close after a BDAT command line could be taken as a following command,
33 giving a synch failure. Fix by only checking for synch immediately
34 before acknowledging the chunk.
36 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
37 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
38 macro. Patches provided by Josh Soref.
40 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
41 Previously we did not; the RFC seems ambiguous and VRFY is not listed
42 by IANA as a service extension. However, John Klensin suggests that we
45 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
46 the dkim code may be unix-mode line endings rather than smtp wire-format
47 CRLF, so prepend a CR to any bare LF.
49 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
50 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
52 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
53 the first were themselves being wrongly included in the feed into dkim
54 processing; with most chunk sizes in use this resulted in an incorrect
55 body hash calculated value.
57 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
58 DKIM signature block, for verification. Although advised against by
59 standards it is specifically not ruled illegal.
61 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
63 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
64 missing a body hash (the bh= tag).
66 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
67 It seems that HAProxy sends the Proxy Protocol information in clear and
68 only then does a TLS startup, so do the same.
70 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
71 TCP connections (such as for Spamd) unless the daemon successfully set
72 Fast Open mode on its listening sockets. This fixes breakage seen on
73 too-old kernels or those not configured for Fast Open, at the cost of
74 requiring both directions being enabled for TFO, and TFO never being used
75 by non-daemon-related Exim processes.
77 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
78 endings, at least on the first header line. Try to canonify any that get
79 past that check, despite the cost.
81 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
82 now limited to an arbitrary five deep, while parsing addresses with the
83 strip_excess_angle_brackets option enabled.
85 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
86 instead leave the unprompted TLS handshake in socket buffer for the
87 TLS library to consume.
89 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
91 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
93 JH/16 Drop variables when they go out of scope. Memory management drops a whole
94 region in one operation, for speed, and this leaves assigned pointers
95 dangling. Add checks run only under the testsuite which checks all
96 variables at a store-reset and panics on a dangling pointer; add code
97 explicitly nulling out all the variables discovered. Fixes one known
98 bug: a transport crash, where a dangling pointer for $sending_ip_address
99 originally assigned in a verify callout, is re-used.
101 PP/06 Drop '.' from @INC in various Perl scripts.
103 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
105 PP/08 Reduce a number of compilation warnings under clang; building with
106 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
107 should be warning-free.
109 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
111 HS/01 Fix portability problems introduced by PP/08 for platforms where
112 realloc(NULL) is not equivalent to malloc() [SunOS et al].
118 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
119 supports it and a size is available (ie. the sending peer gave us one).
121 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
122 years of being deprecated). The replacements are the ACLs
123 acl_smtp_mime and acl_not_smtp_mime.
125 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
126 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
127 or even an in-clear connection were permitted. Now, if the host lookup
128 was dnssec and dane was requested then the host is only used if the
129 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
130 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
131 if one fails this test.
132 This means that a poorly-configured remote DNS will make it incommunicado;
133 but it protects against a DNS-interception attack on it.
135 JH/04 Bug 1810: make continued-use of an open smtp transport connection
136 non-noisy when a race steals the message being considered.
138 JH/05 If main configuration option tls_certificate is unset, generate a
139 self-signed certificate for inbound TLS connections.
141 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
142 in rewrites and routers.
144 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
145 and logged a warning sing 4.83; now they are a configuration file error.
147 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
148 (lacking @domain). Apply the same qualification processing as RCPT.
150 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
152 JH/10 Support ${sha256:} applied to a string (as well as the previous
155 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
156 a cutthrough deliver is pending, as we always want to make a connection.
157 This also avoids re-routing the message when later placing the cutthrough
158 connection after a verify cache hit.
159 Do not update it with the verify result either.
161 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
162 when routing results in more than one destination address.
164 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
165 signing (which inhibits the cutthrough capability). Previously only
166 the presence of an option was tested; now an expansion evaluating as
167 empty is permissible (obviously it should depend only on data available
168 when the cutthrough connection is made).
170 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
171 the relevant preceding SMTP command did not note the pipelining mode.
173 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
174 Previously they were not counted.
176 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
177 as one having no matching records. Previously we deferred the message
178 that needed the lookup.
180 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
181 distinguished as "(=".
183 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
184 for missing MX records. Previously it only worked for missing A records.
186 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
188 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
189 after the data-go-ahead and data-ack. Patch from Jason Betts.
191 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
192 even for a "none" policy. Patch from Tony Meyer.
194 JH/22 Fix continued use of a connection for further deliveries. If a port was
195 specified by a router, it must also match for the delivery to be
198 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
199 When one of the recipients of a message was unsuitable for the connection
200 (has no matching addresses), we lost track of needing to mark it
201 deferred. As a result mail would be lost.
203 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
205 JH/25 Decoding ACL controls is now done using a binary search; the source code
206 takes up less space and should be simpler to maintain. Merge the ACL
207 condition decode tables also, with similar effect.
209 JH/26 Fix problem with one_time used on a redirect router which returned the
210 parent address unchanged. A retry would see the parent address marked as
211 delivered, so not attempt the (identical) child. As a result mail would
214 JH/27 Fix a possible security hole, wherein a process operating with the Exim
215 UID can gain a root shell. Credit to http://www.halfdog.net/ for
216 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
219 JH/28 Enable {spool,log} filesystem space and inode checks as default.
220 Main config options check_{log,spool}_{inodes,space} are now
221 100 inodes, 10MB unless set otherwise in the configuration.
223 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
224 Previously it only applied to the main-section connection policy
227 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
229 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
230 by me. Added RFC7919 DH primes as an alternative.
232 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
233 are not in the system include path.
235 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
236 GnuTLS, when a session startup failed (eg because the client disconnected)
237 Exim did stdio operations after fclose. This was exposed by a recent
238 change which nulled out the file handle after the fclose.
240 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
241 signed directly by the cert-signing cert, rather than an intermediate
242 OCSP-signing cert. This is the model used by LetsEncrypt.
244 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
246 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
247 an incoming connection.
249 HS/02 Bug 1802: Do not half-close the connection after sending a request
252 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
253 fallback to "prime256v1".
255 JH/34 SECURITY: Use proper copy of DATA command in error message.
256 Could leak key material. Remotely exploitable. CVE-2016-9963.
262 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
263 and 3.4.4 - once the server is enabled to respond to an OCSP request
264 it does even when not requested, resulting in a stapling non-aware
265 client dropping the TLS connection.
267 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
268 support variable-length bit vectors. No functional change.
270 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
271 The I= interface field on outgoing lines is now after the H= remote
272 host field, same as incoming lines. There is a separate
273 outgoing_interface log selector which allows you to disable the
276 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
277 If not running log_selector +smtp_connection the mainlog would be held
278 open indefinitely after a "too many connections" event, including to a
279 deleted file after a log rotate. Leave the per net connection logging
280 leaving it open for efficiency as that will be quickly detected by the
281 check on the next write.
283 HS/01 Bug 1671: Fix post transport crash.
284 Processing the wait-<transport> messages could crash the delivery
285 process if the message IDs didn't exist for some reason. When
286 using 'split_spool_directory=yes' the construction of the spool
287 file name failed already, exposing the same netto behaviour.
289 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
290 mime_regex ACL conditions.
292 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
293 to DSN fail messages (bounces): remote IP, remote greeting, remote response
294 to HELO, local diagnostic string.
296 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
297 log line to debug. Even when configured with a tls authenticator many
298 client connections are expected to not authenticate in this way, so
299 an authenticate fail is not an error.
301 HS/02 Add the Exim version string to the process info. This way exiwhat
302 gives some more detail about the running daemon.
304 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
305 matter for fast-change records such as DNSBLs.
307 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
308 retry record, even if constant. There may be multiple transports with
309 different interface settings and the retry behaviour needs to be kept
312 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
314 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
316 JH/10 Bug 840: fix log_defer_output option of pipe transport
318 JH/11 Bug 830: use same host for all RCPTS of a message, even under
319 hosts_randomize. This matters a lot when combined with mua_wrapper.
321 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
322 ${quote_pgsql:<string>} operator.
324 JH/13 Bug 1708: avoid misaligned access in cached lookup.
326 JH/14 Change header file name for freeradius-client. Relevant if compiling
327 with Radius support; from the Gentoo tree and checked under Fedora.
329 JH/15 Bug 1712: Introduce $prdr_requested flag variable
331 JH/16 Bug 1714: Permit an empty string as expansion result for transport
332 option transport_filter, meaning no filtering.
334 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
336 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
337 defaults to "*" (all hosts). The variable is now available when not built
338 with TLS, default unset, mainly to enable keeping the testsuite sane.
339 If a server certificate is not supplied (via tls_certificate) an error is
340 logged, and clients will find TLS connections fail on startup. Presumably
341 they will retry in-clear.
342 Packagers of Exim are strongly encouraged to create a server certificate
343 at installation time.
345 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
346 with the $config_file variable.
348 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
349 in transport context, after the attempt, and per-recipient. The latter type
350 is per host attempted. The event data is the error message, and the errno
351 information encodes the lookup type (A vs. MX) used for the (first) host,
352 and the trailing two digits of the smtp 4xx response.
354 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
355 to write to mainlog (or rejectlog, paniclog) in the window between file
356 creation and permissions/ownership being changed. Particularly affects
357 installations where exicyclog is run as root, rather than exim user;
358 result is that the running daemon panics and dies.
360 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
362 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
363 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
364 "pri" and "weight". Note that the previous implicit priority given by the
365 list order is no longer honoured.
367 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
370 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
371 by defining SUPPORT_SOCKS.
373 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
374 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
375 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
376 variables are renamed to proxy_{local,external}_{address,port}.
378 JH/27 Move Internationalisation support from Experimental to mainline, enabled
379 for a build by defining SUPPORT_I18N
381 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
382 of the query string, and make ${quote_redis:} do that quoting.
384 JH/29 Move Events support from Experimental to mainline, enabled by default
385 and removable for a build by defining DISABLE_EVENT.
387 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
389 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
390 cached by the daemon.
392 JH/32 Move Redis support from Experimental to mainline, enabled for a build
393 by defining LOOKUP_REDIS. The libhiredis library is required.
395 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
396 keys are given for lookup.
398 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
399 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
400 only supported when built with TLS support. The PolarSSL SHA routines
401 are still used when the TLS library is too old for convenient support.
403 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
404 openssl_options), for security. OpenSSL forces this from version 1.1.0
405 server-side so match that on older versions.
407 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
408 allocation for $value could be released as the expansion processing
409 concluded, but leaving the global pointer active for it.
411 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
412 and to use the domains and local_parts ACL conditions.
414 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
415 incorrectly not doubled on cutthrough transmission, hence seen as a
416 body-termination at the receiving system - resulting in truncated mails.
417 Commonly the sender saw a TCP-level error, and retransmitted the message
418 via the normal store-and-forward channel. This could result in duplicates
419 received - but deduplicating mailstores were liable to retain only the
420 initial truncated version.
422 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
424 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
426 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
427 we're in there, support oversigning also; bug 1309.
429 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
431 HS/04 Add support for keep_environment and add_environment options.
433 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
434 either intentional arithmetic overflow during PRNG, or testing config-
437 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
438 delivery resulted in actual delivery. Cancel cutthrough before DATA
441 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
442 rejects a recipient: pass the reject to the originator.
444 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
445 Many were false-positives and ignorable, but it's worth fixing the
448 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
449 for the new environment-manipulation done at startup. Move the routines
450 from being local to tls.c to being global via the os.c file.
452 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
453 an extract embedded as result-arg for a map, the first arg for extract
454 is unavailable so we cannot tell if this is a numbered or keyed
455 extraction. Accept either.
461 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
464 JH/02 The smtp transport option "multi_domain" is now expanded.
466 JH/03 The smtp transport now requests PRDR by default, if the server offers
469 JH/04 Certificate name checking on server certificates, when exim is a client,
470 is now done by default. The transport option tls_verify_cert_hostnames
471 can be used to disable this per-host. The build option
472 EXPERIMENTAL_CERTNAMES is withdrawn.
474 JH/05 The value of the tls_verify_certificates smtp transport and main options
475 default to the word "system" to access the system default CA bundle.
476 For GnuTLS, only version 3.0.20 or later.
478 JH/06 Verification of the server certificate for a TLS connection is now tried
479 (but not required) by default. The verification status is now logged by
480 default, for both outbound TLS and client-certificate supplying inbound
483 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
486 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
487 Status Notification (bounce) messages are now MIME format per RFC 3464.
488 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
489 under the control of the dsn_advertise_hosts option, and routers may
490 have a dsn_lasthop option.
492 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
493 default, modifiable by a malware= option. The list separator for
494 the options can now be changed in the usual way. Bug 68.
496 JH/10 The smtp_receive_timeout main option is now expanded before use.
498 JH/11 The incoming_interface log option now also enables logging of the
499 local interface on delivery outgoing connections.
501 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
502 if the interface and destination host and port all match.
504 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
507 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
508 Patch from Andrew Lewis.
510 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
511 now supports optional time-restrictions, weighting, and priority
512 modifiers per server. Patch originally by <rommer@active.by>.
514 JH/16 The spamd_address main option now supports a mixed list of local
515 and remote servers. Remote servers can be IPv6 addresses, and
516 specify a port-range.
518 JH/17 Bug 68: The spamd_address main option now supports an optional
519 timeout value per server.
521 JH/18 Bug 1581: Router and transport options headers_add/remove can
522 now have the list separator specified.
524 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
527 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
530 JH/21 Support for the A6 type of dns record is withdrawn.
532 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
533 rather than the verbs used.
535 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
536 from 255 to 1024 chars.
538 JH/24 Verification callouts now attempt to use TLS by default.
540 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
541 are generic router options now. The defaults didn't change.
543 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
544 Original patch from Alexander Shikoff, worked over by JH.
546 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
547 files if ZCAT_COMMAND is not executable.
549 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
551 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
553 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
554 Normally benign, it bites when the pair was led to by a CNAME;
555 modern usage is to not canonicalize the domain to a CNAME target
556 (and we were inconsistent anyway for A-only vs AAAA+A).
558 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
560 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
561 when evaluating $sender_host_dnssec.
563 JH/31 Check the HELO verification lookup for DNSSEC, adding new
564 $sender_helo_dnssec variable.
566 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
568 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
570 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
572 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
573 documented as working, but never had. Support all but $spam_report.
575 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
576 added for tls authenticator.
578 HS/03 Add perl_taintmode main config option
584 TL/01 When running the test suite, the README says that variables such as
585 no_msglog_check are global and can be placed anywhere in a specific
586 test's script, however it was observed that placement needed to be near
587 the beginning for it to behave that way. Changed the runtest perl
588 script to read through the entire script once to detect and set these
589 variables, reset to the beginning of the script, and then run through
590 the script parsing/test process like normal.
592 TL/02 The BSD's have an arc4random API. One of the functions to induce
593 adding randomness was arc4random_stir(), but it has been removed in
594 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
595 function when detected.
597 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
598 cause callback expansion.
600 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
601 syntax errors in an expansion can be treated as a string instead of
602 logging or causing an error, due to the internal use of bool_lax
603 instead of bool when processing it.
605 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
606 server certificates when making smtp deliveries.
608 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
610 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
612 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
614 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
615 Merged patch from Sebastian Wiedenroth.
617 JH/05 Fix results-pipe from transport process. Several recipients, combined
618 with certificate use, exposed issues where response data items split
619 over buffer boundaries were not parsed properly. This eventually
620 resulted in duplicates being sent. This issue only became common enough
621 to notice due to the introduction of connection certificate information,
622 the item size being so much larger. Found and fixed by Wolfgang Breyha.
624 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
625 size buffer was used, resulting in syntax errors when an expansion
628 JH/07 Add support for directories of certificates when compiled with a GnuTLS
629 version 3.3.6 or later.
631 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
632 is EXPERIMENTAL_EVENT, the main-configuration and transport options
633 both become "event_action", the variables become $event_name, $event_data
634 and $event_defer_errno. There is a new variable $verify_mode, usable in
635 routers, transports and related events. The tls:cert event is now also
636 raised for inbound connections, if the main configuration event_action
639 TL/06 In test suite, disable OCSP for old versions of openssl which contained
640 early OCSP support, but no stapling (appears to be less than 1.0.0).
642 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
643 server certificate names available under the smtp transport option
644 "tls_verify_cert_hostname" now do not permit multi-component wildcard
647 JH/10 Time-related extraction expansions from certificates now use the main
648 option "timezone" setting for output formatting, and are consistent
649 between OpenSSL and GnuTLS compilations. Bug 1541.
651 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
652 encoded parameter in the incoming message. Bug 1558.
654 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
655 include certificate info, eximon was claiming there were spoolfile
658 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
660 JH/14 Log delivery-related information more consistently, using the sequence
661 "H=<name> [<ip>]" wherever possible.
663 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
664 are problematic for Debian distribution, omit them from the release
667 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
669 JH/16 Fix string representation of time values on 64bit time_t architectures.
672 JH/17 Fix a null-indirection in certextract expansions when a nondefault
673 output list separator was used.
678 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
679 checkers that were complaining about end of non-void function with no
682 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
683 This was a regression introduced in 4.83 by another bugfix.
685 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
687 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
688 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
694 TF/01 Correctly close the server side of TLS when forking for delivery.
696 When a message was received over SMTP with TLS, Exim failed to clear up
697 the incoming connection properly after forking off the child process to
698 deliver the message. In some situations the subsequent outgoing
699 delivery connection happened to have the same fd number as the incoming
700 connection previously had. Exim would try to use TLS and fail, logging
701 a "Bad file descriptor" error.
703 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
704 utilities have not been installed.
706 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
707 temporary space as the ACL may create new global variables.
709 TL/01 LDAP support uses per connection or global context settings, depending
710 upon the detected version of the libraries at build time.
712 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
713 to extract and use the src ip:port in logging and expansions as if it
714 were a direct connection from the outside internet. PPv2 support was
715 updated based on HAProxy spec change in May 2014.
717 JH/02 Add ${listextract {number}{list}{success}{fail}}.
719 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
720 Properly escape header and check for NULL return.
722 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
725 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
727 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
728 characters in header names, implemented as a verify condition.
729 Contributed by Michael Fischer v. Mollard.
731 TL/05 Rename SPF condition results err_perm and err_temp to standardized
732 results permerror and temperror. Previous values are deprecated but
733 still accepted. In a future release, err_perm and err_temp will be
734 completely removed, which will be a backward incompatibility if the
735 ACL tests for either of these two old results. Patch contributed by
736 user bes-internal on the mailing list.
738 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
740 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
741 selectors, in both main and reject logs.
743 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
746 JH/07 Add malware type "sock" for talking to simple daemon.
748 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
750 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
751 routers/transports under cutthrough routing.
753 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
754 numbers. Touch up "bool" conditional to keep the same definition.
756 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
758 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
760 JH/12 Expand items in router/transport headers_add or headers_remove lists
761 individually rather than the list as a whole. Bug 1452.
763 Required for reasonable handling of multiple headers_ options when
764 they may be empty; requires that headers_remove items with embedded
765 colons must have them doubled (or the list-separator changed).
767 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
768 view the policy declared in the DMARC record. Currently, $dmarc_status
769 is a combined value of both the record presence and the result of the
772 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
774 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
775 dnslookup router and the smtp transport (applying to the forward
778 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
779 of ldap servers used for a specific lookup. Patch provided by Heiko
782 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
783 New variable $lookup_dnssec_authenticated for observability.
785 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
786 Patch submitted by Lars Timman.
788 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
790 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
791 Requires trusted mode and valid format message id, aborts otherwise.
792 Patch contributed by Heiko Schlichting.
794 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
795 certextract with support for various fields. Bug 1358.
797 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
798 is requested by default, modifiable by smtp transport option
801 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
802 operate on certificate variables to give certificate fingerprints
803 Also new ${sha256:cert_variable}.
805 JH/23 The PRDR feature is moved from being Experimental into the mainline.
807 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
808 Christian Aistleitner.
810 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
812 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
813 file. Patch from Wolfgang Breyha.
815 JH/25 Expand the coverage of the delivery $host and $host_address to
816 client authenticators run in verify callout. Bug 1476.
818 JH/26 Port service names are now accepted for tls_on_connect_ports, to
819 align with daemon_smtp_ports. Bug 72.
821 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
822 support and error reporting did not work properly.
824 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
825 and is readable. Patch from Andrew Colin Kissa.
827 TL/14 Enhance documentation of ${run expansion and how it parses the
828 commandline after expansion, particularly in the case when an
829 unquoted variable expansion results in an empty value.
831 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
833 PP/02 Fix internal collision of T_APL on systems which support RFC3123
834 by renaming away from it. Addresses GH issue 15, reported by
837 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
839 TL/15 SECURITY: prevent double expansion in math comparison functions
840 (can expand unsanitized data). Not remotely exploitable.
847 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
849 PP/02 Make -n do something, by making it not do something.
850 When combined with -bP, the name of an option is not output.
852 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
855 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
856 $sender_host_name and config options to manage this, and basic check
859 PP/05 DSCP support for outbound connections and control modifier for inbound.
861 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
862 (Only plugin which currently uses this is kerberos4, which nobody should
863 be using, but we should make it available and other future plugins might
864 conceivably use it, even though it would break NAT; stuff *should* be
865 using channel bindings instead).
867 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
868 name; added for Sendmail compatibility; requires admin caller.
869 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
870 just ignore it); requires trusted caller.
871 Also parse but ignore: -Ac -Am -X<logfile>
874 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
876 TL/02 Add +smtp_confirmation as a default logging option.
878 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
879 Patch by Magnus Holmgren from 2007-02-20.
881 TL/04 Bugzilla 1281 - Spec typo.
882 Bugzilla 1283 - Spec typo.
883 Bugzilla 1290 - Spec grammar fixes.
885 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
887 TL/06 Add Experimental DMARC support using libopendmarc libraries.
889 TL/07 Fix an out of order global option causing a segfault. Reported to dev
890 mailing list by by Dmitry Isaikin.
892 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
894 JH/02 Support "G" suffix to numbers in ${if comparisons.
896 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
898 NM/01 Bugzilla 1197 - Spec typo
899 Bugzilla 1196 - Spec examples corrections
901 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
903 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
904 gnutls_enable_pkcs11, but renamed to more accurately indicate its
907 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
908 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
910 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
911 "acl {{name}{arg}...}", and optional args on acl condition
914 JH/05 Permit multiple router/transport headers_add/remove lines.
916 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
918 JH/07 Avoid using a waiting database for a single-message-only transport.
919 Performance patch from Paul Fisher. Bugzilla 1262.
921 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
924 JH/09 Add $headers_added variable, with content from use of ACL modifier
925 add_header (but not yet added to the message). Bugzilla 199.
927 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
928 Pulled from Bugzilla 817 by Wolfgang Breyha.
930 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
932 (nb: this is the same fix as in Exim 4.80.1)
934 JH/11 Add A= logging on delivery lines, and a client_set_id option on
937 JH/12 Add optional authenticated_sender logging to A= and a log_selector
940 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
942 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
943 advertise SMTP AUTH mechanism to us, instead of a generic
944 protocol violation error. Also, make Exim more robust to bad
945 data from the Dovecot auth socket.
947 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
949 When a queue runner is handling a message, Exim first routes the
950 recipient addresses, during which it prunes them based on the retry
951 hints database. After that it attempts to deliver the message to
952 any remaining recipients. It then updates the hints database using
955 So if a recipient address works intermittently, it can get repeatedly
956 deferred at routing time. The retry hints record remains fresh so the
957 address never reaches the final cutoff time.
959 This is a fairly common occurrence when a user is bumping up against
960 their storage quota. Exim had some logic in its local delivery code
961 to deal with this. However it did not apply to per-recipient defers
962 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
964 This change adds a proper retry rule check during routing so that the
965 final cutoff time is checked against the message's age. We only do
966 this check if there is an address retry record and there is not a
967 domain retry record; this implies that previous attempts to handle
968 the address had the retry_use_local_parts option turned on. We use
969 this as an approximation for the destination being like a local
970 delivery, as in LMTP.
972 I suspect this new check makes the old local delivery cutoff check
973 redundant, but I have not verified this so I left the code in place.
975 TF/02 Correct gecos expansion when From: is a prefix of the username.
977 Test 0254 submits a message to Exim with the header
981 When I ran the test suite under the user fanf2, Exim expanded
982 the header to contain my full name, whereas it should have added
983 a Resent-Sender: header. It erroneously treats any prefix of the
984 username as equal to the username.
986 This change corrects that bug.
988 GF/01 DCC debug and logging tidyup
989 Error conditions log to paniclog rather than rejectlog.
990 Debug lines prefixed by "DCC: " to remove any ambiguity.
992 TF/03 Avoid unnecessary rebuilds of lookup-related code.
994 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
995 Bug spotted by Jeremy Harris; was flawed since initial commit.
996 Would have resulted in OCSP responses post-SNI triggering an Exim
997 NULL dereference and crash.
999 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1001 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1002 Bug detection, analysis and fix by Samuel Thibault.
1003 Bugzilla 1331, Debian bug #698092.
1005 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1007 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1008 Server implementation by Todd Lyons, client by JH.
1009 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1010 config variable "prdr_enable" controls whether the server
1011 advertises the facility. If the client requests PRDR a new
1012 acl_data_smtp_prdr ACL is called once for each recipient, after
1013 the body content is received and before the acl_smtp_data ACL.
1014 The client is controlled by both of: a hosts_try_prdr option
1015 on the smtp transport, and the server advertisement.
1016 Default client logging of deliveries and rejections involving
1017 PRDR are flagged with the string "PRDR".
1019 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1020 fclose(). Diagnosis by Todd Lyons.
1022 PP/17 Update configure.default to handle IPv6 localhost better.
1023 Patch by Alain Williams (plus minor tweaks).
1026 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1027 This is now consistent with GnuTLS, and is now documented: the
1028 previous undocumented portable approach to treating the option as
1029 unset was to force an expansion failure. That still works, and
1030 an empty string is now equivalent.
1032 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1033 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1034 not performing validation itself.
1036 PP/20 Added force_command boolean option to pipe transport.
1037 Patch from Nick Koston, of cPanel Inc.
1039 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1042 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1044 PP/21 Fix eximon continuous updating with timestamped log-files.
1045 Broken in a format-string cleanup in 4.80, missed when I repaired the
1046 other false fix of the same issue.
1047 Report and fix from Heiko Schlichting.
1050 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1051 Report from Prashanth Katuri.
1053 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1054 It's SecureTransport, so affects any MacOS clients which use the
1055 system-integrated TLS libraries, including email clients.
1057 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1058 using a MIME ACL for non-SMTP local injection.
1059 Report and assistance in diagnosis by Warren Baker.
1061 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1063 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1065 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1066 last id that failed so it may be referenced in subsequent ACL's.
1068 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1071 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1072 ldap library initialization, allowing self-signed CA's to be
1073 used. Also properly sets require_cert option later in code by
1074 using NULL (global ldap config) instead of ldap handle (per
1075 session). Bug diagnosis and testing by alxgomz.
1077 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1078 the src/util/ subdirectory.
1080 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1081 renamed to Transport Post Delivery Action by Jeremy Harris, as
1084 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1085 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1086 redis_servers = needs to be configured which will be used by the redis
1087 lookup. Patch from Warren Baker, of The Packet Hub.
1089 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1091 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1092 hostname or reverse DNS when processing a host list. Used suggestions
1093 from multiple comments on this bug.
1095 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1097 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1098 Missed a few lines, added it to make the runtest require no keyboard
1101 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1102 contains upper case chars. Make router use caseful_local_part.
1104 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1105 support when GnuTLS has been built with p11-kit.
1111 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1113 This, or similar/improved, will also be change PP/11 of 4.82.
1119 PP/01 Handle short writes when writing local log-files.
1120 In practice, only affects FreeBSD (8 onwards).
1121 Bugzilla 1053, with thanks to Dmitry Isaikin.
1123 NM/01 Bugzilla 949 - Documentation tweak
1125 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1128 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1130 PP/02 Implemented gsasl authenticator.
1132 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1134 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1135 `pkg-config foo` for cflags/libs.
1137 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1138 with rest of GSASL and with heimdal_gssapi.
1140 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1141 `pkg-config foo` for cflags/libs for the TLS implementation.
1143 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1144 properties get this fed in as external SSF. A number of robustness
1145 and debugging improvements to the cyrus_sasl authenticator.
1147 PP/08 cyrus_sasl server now expands the server_realm option.
1149 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1150 Patch by Jeremy Harris.
1152 PP/10 Added dbmjz lookup type.
1154 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1156 PP/12 MAIL args handles TAB as well as SP, for better interop with
1157 non-compliant senders.
1158 Analysis and variant patch by Todd Lyons.
1160 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1161 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1162 Patch from Dirk Mueller <dmueller@suse.com>
1164 PP/13 tls_peerdn now print-escaped for spool files.
1165 Observed some $tls_peerdn in wild which contained \n, which resulted
1166 in spool file corruption.
1168 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1169 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1170 or write after TLS renegotiation, which otherwise led to messages
1173 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1174 as a tracking header (ie: a signed header comes before the signature).
1175 Patch from Wolfgang Breyha.
1177 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1178 comma-sep list; embedded commas doubled.
1180 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1182 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1184 Report and patch from Dmitry Banschikov.
1186 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1187 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1188 failures. We appear to now support TLS1.1+ with Exim.
1190 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1191 lets Exim select keys and certificates based upon TLS SNI from client.
1192 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1193 before an outbound SMTP session. New log_selector, +tls_sni.
1195 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1196 NULL dereference. Report and patch from Alun Jones.
1198 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1199 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1200 Not seeing resolver debug output on NetBSD, but suspect this is a
1201 resolver implementation change.
1203 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1204 Left warnings. Added "eximon gdb" invocation mode.
1206 PP/21 Defaulting "accept_8bitmime" to true, not false.
1208 PP/22 Added -bw for inetd wait mode support.
1210 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1211 locate the relevant includes and libraries. Made this the default.
1213 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1214 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1216 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1217 This may cause build issues on older platforms.
1219 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1220 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1221 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1222 Added SNI support via GnuTLS too.
1223 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1225 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1227 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1228 Applied second patch from Janne, implementing suggestion to default
1229 multiple-strings-in-record handling to match SPF spec.
1231 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1233 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1234 read-only, out of scope).
1235 Patch from Wolfgang Breyha, report from Stuart Northfield.
1237 PP/29 Fix three issues highlighted by clang analyser static analysis.
1238 Only crash-plausible issue would require the Cambridge-specific
1239 iplookup router and a misconfiguration.
1240 Report from Marcin Mirosław.
1242 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1244 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1245 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1246 As part of this, removing so much warning spew let me fix some minor
1247 real issues in debug logging.
1249 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1250 assignment on my part. Fixed.
1252 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1253 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1254 Janne Snabb (who went above and beyond: thank you).
1256 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1257 string otherwise requires a connection and a bunch more work and it's
1258 relatively easy to get wrong. Should also expose TLS library linkage
1261 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1262 64-bit ${eval} (JH/03).
1264 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1265 GNU libc to support some of the 64-bit stuff, should not lead to
1266 conflicts. Defined before os.h is pulled in, so if a given platform
1267 needs to override this, it can.
1269 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1270 protection layer was required, which is not implemented.
1271 Bugzilla 1254, patch from Wolfgang Breyha.
1273 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1274 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1275 tls_dhparam take prime identifiers. Also unbreak combination of
1276 OpenSSL+DH_params+TLSSNI.
1278 PP/39 Disable SSLv2 by default in OpenSSL support.
1284 PP/01 Solaris build fix for Oracle's LDAP libraries.
1285 Bugzilla 1109, patch from Stephen Usher.
1287 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1289 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1292 TF/02 Fix a couple more cases where we did not log the error message
1293 when unlink() failed. See also change 4.74-TF/03.
1295 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1296 lock up or crash if it happened to be inside a call to libc when it
1297 got a SIGUSR1 from exiwhat.
1299 The SIGUSR1 handler appends the current process status to the process
1300 log which is later printed by exiwhat. It used to use the general
1301 purpose logging code to do this, but several functions it calls are
1302 not safe for signals.
1304 The new output code in the SIGUSR1 handler is specific to the process
1305 log, and simple enough that it's easy to inspect for signal safety.
1306 Removing some special cases also simplifies the general logging code.
1307 Removing the spurious timestamps from the process log simplifies
1310 TF/04 Improved ratelimit ACL condition.
1312 The /noupdate option has been deprecated in favour of /readonly which
1313 has clearer semantics. The /leaky, /strict, and /readonly update modes
1314 are mutually exclusive. The update mode is no longer included in the
1315 database key; it just determines when the database is updated. (This
1316 means that when you upgrade Exim will forget old rate measurements.)
1318 Exim now checks that the per_* options are used with an update mode that
1319 makes sense for the current ACL. For example, when Exim is processing a
1320 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1321 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1322 must specify per_mail/readonly. If you omit the update mode it defaults to
1323 /leaky where that makes sense (as before) or /readonly where required.
1325 The /noupdate option is now undocumented but still supported for
1326 backwards compatibility. It is equivalent to /readonly except that in
1327 ACLs where /readonly is required you may specify /leaky/noupdate or
1328 /strict/noupdate which are treated the same as /readonly.
1330 A useful new feature is the /count= option. This is a generalization
1331 of the per_byte option, so that you can measure the throughput of other
1332 aggregate values. For example, the per_byte option is now equivalent
1333 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1335 The per_rcpt option has been generalized using the /count= mechanism
1336 (though it's more complicated than the per_byte equivalence). When it is
1337 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1338 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1339 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1340 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1341 Note that using per_rcpt with a non-readonly update mode in more than
1342 one ACL will cause the recipients to be double-counted. (The per_mail
1343 and per_byte options don't have this problem.)
1345 The handling of very low rates has changed slightly. If the computed rate
1346 is less than the event's count (usually one) then this event is the first
1347 after a long gap. In this case the rate is set to the same as this event's
1348 count, so that the first message of a spam run is counted properly.
1350 The major new feature is a mechanism for counting the rate of unique
1351 events. The new per_addr option counts the number of different
1352 recipients that someone has sent messages to in the last time period. It
1353 behaves like per_rcpt if all the recipient addresses are different, but
1354 duplicate recipient addresses do not increase the measured rate. Like
1355 the /count= option this is a general mechanism, so the per_addr option
1356 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1357 example, measure the rate that a client uses different sender addresses
1358 with the options per_mail/unique=$sender_address. There are further
1359 details in the main documentation.
1361 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1363 TF/06 Removed a few PCRE remnants.
1365 TF/07 Automatically extract Exim's version number from tags in the git
1366 repository when doing development or release builds.
1368 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1369 Bugzilla 879. Patch from Paul Fisher.
1371 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1372 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1375 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1377 PP/05 Variable $av_failed, true if the AV scanner deferred.
1378 Bugzilla 1078. Patch from John Horne.
1380 PP/06 Stop make process more reliably on build failure.
1381 Bugzilla 1087. Patch from Heiko Schlittermann.
1383 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1384 Bugzilla 1089. Patch from Heiko Schlittermann.
1386 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1387 Bugzilla 1131. Patch from Holger Weiß.
1389 PP/09 Handle IPv6 addresses with SPF.
1390 Bugzilla 860. Patch from Wolfgang Breyha.
1392 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1394 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1397 PP/11 match_* no longer expand right-hand-side by default.
1398 New compile-time build option, EXPAND_LISTMATCH_RHS.
1399 New expansion conditions, "inlist", "inlisti".
1401 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1403 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1405 PP/14 fix log_write() format string regression from TF/03.
1406 Bugzilla 1152. Patch from Dmitry Isaikin.
1412 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1414 PP/02 Harmonised TLS library version reporting; only show if debugging.
1415 Layout now matches that introduced for other libraries in 4.74 PP/03.
1417 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1419 PP/04 New "dns_use_edns0" global option.
1421 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1424 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1425 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1427 TK/01 Updated PolarSSL code to 0.14.2.
1428 Bugzilla 1097. Patch from Andreas Metzler.
1430 PP/07 Catch divide-by-zero in ${eval:...}.
1431 Fixes bugzilla 1102.
1433 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1436 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1437 format-string attack -- SECURITY: remote arbitrary code execution.
1439 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1440 time unintentionally subject to list matching rules, letting the header
1441 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1442 arbitrary string expansion). This allowed for information disclosure.
1444 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1445 INT_MIN/-1 -- value coerced to INT_MAX.
1451 NM/01 Workaround for PCRE version dependency in version reporting
1454 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1455 This fixes portability to compilers other than gcc, notably
1456 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1458 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1459 makefiles for portability to HP-UX and POSIX correctness.
1461 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1462 Also via indented variable definition in the Makefile.
1463 (Debugging by Oliver Heesakkers).
1465 PP/02 Restore caching of spamd results with expanded spamd_address.
1466 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1468 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1469 Improves build reliability. Fix from: Frank Elsner
1471 NM/02 Fix wide character breakage in the rfc2047 coding
1472 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1474 NM/03 Allow underscore in dnslist lookups
1475 Fixes bug 1026. Patch from Graeme Fowler
1477 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1478 Code patches from Adam Ciarcinski of NetBSD.
1480 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1483 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1484 is logged, to avoid truncation. Patch from John Horne.
1486 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1487 Patch from Jakob Hirsch.
1489 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1490 SQL string expansion failure details.
1491 Patch from Andrey Oktyabrski.
1493 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1494 Patch from Simon Arlott.
1496 PP/09 New lookups functionality failed to compile on old gcc which rejects
1497 extern declarations in function scope.
1498 Patch from Oliver Fleischmann
1500 PP/10 Use sig_atomic_t for flags set from signal handlers.
1501 Check getgroups() return and improve debugging.
1502 Fixed developed for diagnosis in bug 927 (which turned out to be
1505 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1506 Patch from Mark Zealey.
1508 PP/12 Bugzilla 1056: Improved spamd server selection.
1509 Patch from Mark Zealey.
1511 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1512 Based on patch from Heiko Schlittermann.
1514 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1515 Patch from Uwe Doering, sign-off by Michael Haardt.
1517 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1518 variable declaration deep within a block. Bug and patch from
1521 PP/15 lookups-Makefile IRIX compatibility coercion.
1523 PP/16 Make DISABLE_DKIM build knob functional.
1525 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1526 Patch by Simon Arlott
1528 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1529 variable argument macros. Our copy now differs from upstream.
1535 TF/01 Failure to get a lock on a hints database can have serious
1536 consequences so log it to the panic log.
1538 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1539 controlled using the smtp_confirmation log selector.
1541 TF/03 Include the error message when we fail to unlink a spool file.
1543 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1544 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1545 for maintaining out-of-tree patches for some time.
1547 PP/01 Bugzilla 139: Documentation and portability issues.
1548 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1549 Handle per-OS dynamic-module compilation flags.
1551 PP/02 Let /dev/null have normal permissions.
1552 The 4.73 fixes were a little too stringent and complained about the
1553 permissions on /dev/null. Exempt it from some checks.
1554 Reported by Andreas M. Kirchwitz.
1556 PP/03 Report version information for many libraries, including
1557 Exim version information for dynamically loaded libraries. Created
1558 version.h, now support a version extension string for distributors
1559 who patch heavily. Dynamic module ABI change.
1561 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1562 privilege escalation vulnerability whereby the Exim run-time user
1563 can cause root to append content of the attacker's choosing to
1566 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1569 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1570 If dropping privileges for untrusted macros, we disabled normal logging
1571 on the basis that it would fail; for the Exim run-time user, this is not
1572 the case, and it resulted in successful deliveries going unlogged.
1573 Fixed. Reported by Andreas Metzler.
1579 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1580 only prepend for the Resent-* case. Fixes regression introduced in
1581 Exim 4.70 by NM/22 for Bugzilla 607.
1583 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1584 increasing numbers of administrators be bitten by this.
1586 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1588 PP/03 Bugzilla 994: added openssl_options main configuration option.
1590 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1592 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1594 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1596 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1597 without a peer certificate, leading to a segfault because of an
1598 assumption that peers always have certificates. Be a little more
1599 paranoid. Problem reported by Martin Tscholak.
1601 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1602 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1603 NB: ClamAV planning to remove STREAM in "middle of 2010".
1604 CL also introduces -bmalware, various -d+acl logging additions and
1605 more caution in buffer sizes.
1607 PP/09 Implemented reverse_ip expansion operator.
1609 PP/10 Bugzilla 937: provide a "debug" ACL control.
1611 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1613 PP/12 Bugzilla 973: Implement --version.
1615 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1617 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1619 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1621 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1622 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1623 ignore trailing whitespace.
1625 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1627 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1630 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1631 Notification from Dr Andrew Aitchison.
1633 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1634 ExtendedDetectionInfo response format.
1635 Notification from John Horne.
1637 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1640 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1641 XSL and documented dependency on system catalogs, with examples of how
1644 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1647 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1648 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1649 configuration file which is writeable by the Exim user or group.
1651 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1652 of configuration files to cover files specified with the -C option if
1653 they are going to be used with root privileges, not just the default
1656 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1657 option (effectively making it always true).
1659 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1660 files to be used while preserving root privileges.
1662 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1663 that rogue child processes cannot use them.
1665 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1666 run-time user, instead of root.
1668 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1669 Exim run-time user without dropping privileges.
1671 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1672 result string, instead of calling string_vformat() twice with the same
1675 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1676 for other users. Others should always drop root privileges if they use
1677 -C on the command line, even for a whitelisted configure file.
1679 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1681 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1687 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1688 $data_path, and $header_path variables; fixed documentation bugs and
1691 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1692 exipick to access non-standard spools, including the "frozen" queue
1695 NM/01 Bugzilla 965: Support mysql stored procedures.
1696 Patch from Alain Williams
1698 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1700 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1701 Patch from Andreas Metzler
1703 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1704 Patch from Kirill Miazine
1706 NM/05 Bugzilla 671: Added umask to procmail example.
1708 JJ/03 installed exipick 20100323.0, fixing doc bug
1710 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1711 directory. Notification and patch from Dan Rosenberg.
1713 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1715 TK/02 Improve log output when DKIM signing operation fails.
1717 MH/01 Treat the transport option dkim_domain as a colon separated
1718 list, not as a single string, and sign the message with each element,
1719 omitting multiple occurences of the same signer.
1721 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1722 Bugzilla 985, 986. Patch by Simon Arlott
1724 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1725 Patch by Simon Arlott
1727 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1728 MBX locking. Notification from Dan Rosenberg.
1734 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1736 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1738 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1740 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1742 NM/04 Bugzilla 915: Flag broken perl installation during build.
1748 TK/01 Added patch by Johannes Berg that expands the main option
1749 "spamd_address" if it starts with a dollar sign.
1751 TK/02 Write list of recipients to X-Envelope-Sender header when building
1752 the mbox-format spool file for content scanning (suggested by Jakob
1755 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1756 (http://www.dcc-servers.net/) support via dccifd. Activated by
1757 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1759 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1760 by Mark Daniel Reidel <mr@df.eu>.
1762 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1763 When building exim an external PCRE library is now needed -
1764 PCRE is a system library on the majority of modern systems.
1765 See entry on PCRE_LIBS in EDITME file.
1767 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1768 conversation. Added nologin parameter to request.
1769 Patch contributed by Kirill Miazine.
1771 TF/01 Do not log submission mode rewrites if they do not change the address.
1773 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1775 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1776 log files in place. Contributed by Roberto Lima.
1778 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1780 TF/03 Bugzilla 615: When checking the local_parts router precondition
1781 after a local_part_suffix or local_part_prefix option, Exim now
1782 does not use the address's named list lookup cache, since this
1783 contains cached lookups for the whole local part.
1785 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1786 Robert Millan. Documentation is in experimental-spec.txt.
1788 TF/04 Bugzilla 668: Fix parallel build (make -j).
1790 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1792 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1793 Patch provided by Jan Srzednicki.
1795 TF/05 Leading white space used to be stripped from $spam_report which
1796 wrecked the formatting. Now it is preserved.
1798 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1799 that they are available at delivery time.
1801 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1803 TF/08 TLS error reporting now respects the incoming_interface and
1804 incoming_port log selectors.
1806 TF/09 Produce a more useful error message if an SMTP transport's hosts
1807 setting expands to an empty string.
1809 NM/06 Bugzilla 744: EXPN did not work under TLS.
1810 Patch provided by Phil Pennock.
1812 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1813 Patch provided by Richard Godbee.
1815 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1816 acl_smtp_notquit, added index entry.
1818 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1819 Patch provided by Eugene Bujak.
1821 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1822 accept(). Patch provided by Maxim Dounin.
1824 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1825 Patch provided by Phil Pennock.
1827 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1829 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1830 Patch provided by Brad "anomie" Jorsch.
1832 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1833 Patch provided by Dean Brooks.
1835 TK/05 Add native DKIM support (does not depend on external libraries).
1837 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1838 Patch provided by Graeme Fowler.
1840 NM/16 Bugzilla 851: Documentation example syntax fix.
1842 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1844 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1847 NM/19 Bugzilla 745: TLS version reporting.
1848 Patch provided by Phil Pennock.
1850 NM/20 Bugzilla 167: bool: condition support.
1851 Patch provided by Phil Pennock.
1853 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1854 clients. Patch provided by Phil Pennock.
1856 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1857 Patch provided by Brad "anomie" Jorsch.
1859 NM/23 Bugzilla 687: Fix misparses in eximstats.
1860 Patch provided by Heiko Schlittermann.
1862 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1863 Patch provided by Heiko Schlittermann.
1865 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1866 plus update to original patch.
1868 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1870 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1871 Patch provided by David Brownlee.
1873 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1875 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1877 NM/30 Bugzilla 888: TLS documentation bugfixes.
1879 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1881 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1882 Unlike the original bugzilla I have changed all shell scripts in src tree.
1884 NM/33 Bugzilla 898: Transport filter timeout fix.
1885 Patch by Todd Rinaldo.
1887 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1888 Patch by Serge Demonchaux.
1890 NM/35 Bugzilla 39: Base64 decode bug fixes.
1891 Patch by Jakob Hirsch.
1893 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1895 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1897 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1899 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1905 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1906 ALT-N's libdkim that I have put here:
1907 http://duncanthrax.net/exim-experimental/
1909 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1910 were called 'true' and it seems that C99 defines that as a reserved
1911 keyword to be used with 'bool' variable types. That means you could
1912 not include C99-style headers which use bools without triggering
1913 build errors in sieve.c.
1915 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1916 as mailq or other aliases. Changed the --help handling significantly
1917 to do whats expected. exim_usage() emits usage/help information.
1919 SC/01 Added the -bylocaldomain option to eximstats.
1921 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1923 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1925 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1931 PH/01 Another patch from the Sieve maintainer.
1933 PH/02 When an IPv6 address is converted to a string for single-key lookup
1934 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1935 dots are used instead of colons so that keys in lsearch files need not
1936 contain colons. This was done some time before quoting was made available
1937 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1938 (notated using the quote facility) so as to distinguish them from IPv4
1939 keys. This meant that lookups for IP addresses in host lists did not work
1940 for iplsearch lookups.
1942 This has been fixed by arranging for IPv6 addresses to be expressed with
1943 colons if the lookup type is iplsearch. This is not incompatible, because
1944 previously such lookups could never work.
1946 The situation is now rather anomalous, since one *can* have colons in
1947 ordinary lsearch keys. However, making the change in all cases is
1948 incompatible and would probably break a number of configurations.
1950 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1953 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1954 conversion specification without a maximum field width, thereby enabling
1955 a rogue spamd server to cause a buffer overflow. While nobody in their
1956 right mind would setup Exim to query an untrusted spamd server, an
1957 attacker that gains access to a server running spamd could potentially
1958 exploit this vulnerability to run arbitrary code as the Exim user.
1960 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1961 $primary_hostname instead of what libspf2 thinks the hosts name is.
1963 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1964 a directory entry by the name of the lookup key. Previously, if a
1965 symlink pointed to a non-existing file or a file in a directory that
1966 Exim lacked permissions to read, a lookup for a key matching that
1967 symlink would fail. Now it is enough that a matching directory entry
1968 exists, symlink or not. (Bugzilla 503.)
1970 PH/03 The body_linecount and body_zerocount variables are now exported in the
1973 PH/04 Added the $dnslist_matched variable.
1975 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1976 This means they are set thereafter only if the connection becomes
1979 PH/06 Added the client_condition to authenticators so that some can be skipped
1980 by clients under certain conditions.
1982 PH/07 The error message for a badly-placed control=no_multiline_responses left
1983 "_responses" off the end of the name.
1985 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1987 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1988 (without spaces) instead of just copying the configuration text.
1990 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1992 PH/11 Added $max_received_linelength.
1994 PH/12 Added +ignore_defer and +include_defer to host lists.
1996 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1997 way in which PCRE > 7.0 is built.
1999 PH/14 Implemented queue_only_load_latch.
2001 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2002 MAIL command. The effect was to mangle the value on 64-bit systems.
2004 PH/16 Another patch from the Sieve maintainer.
2006 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2008 PH/18 If a system quota error occurred while trying to create the file for
2009 a maildir delivery, the message "Mailbox is full" was not appended to the
2010 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2011 only to a quota excession during the actual writing of the file.
2013 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2014 characters?) which causes problems in log lines. The DN values are now
2015 passed through string_printing() before being added to log lines.
2017 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2018 and InterBase are left for another time.)
2020 PH/21 Added message_body_newlines option.
2022 PH/22 Guard against possible overflow in moan_check_errorcopy().
2024 PH/23 POSIX allows open() to be a macro; guard against that.
2026 PH/24 If the recipient of an error message contained an @ in the local part
2027 (suitably quoted, of course), incorrect values were put in $domain and
2028 $local_part during the evaluation of errors_copy.
2034 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2035 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2038 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2039 issue a MAIL command.
2041 PH/02 In an ACL statement such as
2043 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2045 if a client was not listed at all, or was listed with a value other than
2046 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2047 the condition was not true (as it should be), so access was not denied.
2048 The bug was that the ! inversion was incorrectly passed on to the second
2049 item. This has been fixed.
2051 PH/03 Added additional dnslists conditions == and =& which are different from
2052 = and & when the dns lookup returns more than one IP address.
2054 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2055 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2057 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2058 FSYNC, which compiles an option called disable_fsync that allows for
2059 bypassing fsync(). The documentation is heavily laced with warnings.
2061 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2063 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2064 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2065 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2066 including adding "make clean"; (3) Added -fPIC when compiling the test
2067 dynamically loaded module, to get rid of a warning.
2069 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2070 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2071 = 0s. The bug is otherwise harmless.
2073 PH/07 There was a bug in the dovecot authenticator such that the value of
2074 $auth1 could be overwritten, and so not correctly preserved, after a
2075 successful authentication. This usually meant that the value preserved by
2076 the server_setid option was incorrect.
2078 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2080 PH/09 Installed PCRE release 7.0.
2082 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2083 run for batched SMTP input. It is now run at the start of every message
2084 in the batch. While fixing this I discovered that the process information
2085 (output by running exiwhat) was not always getting set for -bs and -bS
2086 input. This is fixed, and it now also says "batched" for BSMTP.
2088 PH/11 Added control=no_pipelining.
2090 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2091 patch, slightly modified), and move the expansion of helo_data till after
2092 the connection is made in the smtp transport (so it can use these
2095 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2097 PH/14 Added log_selector = +pid.
2099 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2101 PH/16 Add ${if forany and ${if forall.
2103 PH/17 Added dsn_from option to vary the From: line in DSNs.
2105 PH/18 Flush SMTP output before performing a callout, unless control =
2106 no_callout_flush is set.
2108 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2109 was true (the default) a successful delivery failed to delete the retry
2110 item, thus causing premature timeout of the address. The bug is now
2113 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2115 PH/21 Long custom messages for fakedefer and fakereject are now split up
2116 into multiline responses in the same way that messages for "deny" and
2117 other ACL rejections are.
2119 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2120 with slight modification.
2122 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2123 draft, changing the syntax and factoring some duplicate code".
2125 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2126 for deliveries of the second and subsequent messages over the same SMTP
2129 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2130 ${reduce, with only minor "tidies".
2132 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2134 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2135 expansion side effects.
2137 PH/27 When a message times out after an over-quota error from an Exim-imposed
2138 quota, the bounce message says "mailbox is full". This message was not
2139 being given when it was a system quota that was exceeded. It now should
2142 MH/03 Made $recipients available in local_scan(). local_scan() already has
2143 better access to the recipient list through recipients_list[], but
2144 $recipients can be useful in postmaster-provided expansion strings.
2146 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2147 in the case of a MAIL command with additional options following the
2148 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2149 were accidentally chopped off.
2151 PH/29 SMTP synchronization checks are implemented when a command is read -
2152 there is a check that no more input is waiting when there shouldn't be
2153 any. However, for some commands, a delay in an ACL can mean that it is
2154 some time before the response is written. In this time, more input might
2155 arrive, invalidly. So now there are extra checks after an ACL has run for
2156 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2157 pipelining has not been advertised.
2159 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2161 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2162 returned in the SMTP response when smtp_return_error_details was false.
2163 This has been fixed.
2165 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2166 instead of the C I/O that was originally supplied, because problems were
2167 reported on Solaris.
2169 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2170 Exim which did not show up earlier: it was assuming that a call to
2171 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2172 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2173 was a macro that became an assignment, so it seemed to work. This has
2174 changed to a proper function call with a void return, hence the compile
2175 error. Exim's code has been fixed.
2177 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2180 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2182 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2184 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2185 because it turns out to be too big or there is a timeout) there is no
2186 "Completed" line in the log. When some messages of this type were
2187 selected by exigrep, they were listed as "not completed". Others were
2188 picked up by some special patterns. I have improved the selection
2189 criteria to be more general.
2191 PH/38 The host_find_failed option in the manualroute router can now be set
2192 to "ignore", to completely ignore a host whose IP address cannot be
2193 found. If all hosts are ignored, the behaviour is controlled by the new
2194 host_all_ignored option.
2196 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2197 homing or because of multiple MX records with /mx) generated more than
2198 one IP address, and the following item turned out to be the local host,
2199 all the secondary addresses of the first item were incorrectly removed
2200 from the list, along with the local host and any following hosts (which
2201 is what is supposed to happen).
2203 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2204 whoever called Exim into the -H file. In the case of the daemon it was
2205 behaving confusingly. When first started, it used values for whoever
2206 started the daemon, but after a SIGHUP it used the Exim user (because it
2207 calls itself on a restart). I have changed the code so that it now always
2210 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2211 message are rejected with the same error (e.g. no authentication or bad
2212 sender address), and a DATA command is nevertheless sent (as can happen
2213 with PIPELINING or a stupid MUA), the error message that was given to the
2214 RCPT commands is included in the rejection of the DATA command. This is
2215 intended to be helpful for MUAs that show only the final error to their
2218 PH/42 Another patch from the Sieve maintainer.
2220 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2221 Eximstats - Fixed some broken HTML links and added missing column headers
2223 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2224 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2226 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2228 PH/43 Yet another patch from the Sieve maintainer.
2230 PH/44 I found a way to check for a TCP/IP connection going away before sending
2231 the response to the final '.' that terminates a message, but only in the
2232 case where the client has not sent further data following the '.'
2233 (unfortunately, this is allowed). However, in many cases there won't be
2234 any further data because there won't be any more messages to send. A call
2235 to select() can be used: if it shows that the input is "ready", there is
2236 either input waiting, or the socket has been closed. An attempt to read
2237 the next input character can distinguish the two cases. Previously, Exim
2238 would have sent an OK response which the client would never have see.
2239 This could lead to message repetition. This fix should cure that, at
2240 least in a lot of common cases.
2242 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2243 advertised in response to EHLO.
2249 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2250 fixed by 4.65/MH/01 (is this a record?) are fixed:
2252 (i) An empty string was always treated as zero by the numeric comparison
2253 operators. This behaviour has been restored.
2255 (ii) It is documented that the numeric comparison operators always treat
2256 their arguments as decimal numbers. This was broken in that numbers
2257 starting with 0 were being interpreted as octal.
2259 While fixing these problems I realized that there was another issue that
2260 hadn't been noticed. Values of message_size_limit (both the global option
2261 and the transport option) were treated as octal if they started with 0.
2262 The documentation was vague. These values are now always treated as
2263 decimal, and I will make that clear in the documentation.
2269 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2270 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2273 MH/01 Don't check that the operands of numeric comparison operators are
2274 integers when their expansion is in "skipping" mode (fixes bug
2275 introduced by 4.64-PH/07).
2277 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2278 child addresses, Exim now panics and dies. Previously, because the count
2279 is held in a short int, deliveries were likely to be lost. As such a
2280 large number of recipients for a single message is ridiculous
2281 (performance will be very, very poor), I have chosen to impose a limit
2282 rather than extend the field.
2288 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2289 leftover -K file (the existence of which was triggered by #402).
2290 While we were at it, introduced process PID as part of the -K
2291 filename. This should rule out race conditions when creating
2294 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2295 processing considerably. Previous code took too long for large mails,
2296 triggering a timeout which in turn triggers #401.
2298 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2299 in the DK code in transports.c. sendfile() is not really portable,
2300 hence the _LINUX specificness.
2302 TF/01 In the add_headers option to the mail command in an Exim filter,
2303 there was a bug that Exim would claim a syntax error in any
2304 header after the first one which had an odd number of characters
2307 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2308 callout verification, Exim cached a "reject" for the entire domain. This
2309 is correct for most verifications, but it is not correct for a recipient
2310 verification with use_sender or use_postmaster set, because in that case
2311 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2312 case of MAIL FROM:<> rejection from other early rejections (e.g.
2313 rejection of HELO). When verifying a recipient using a non-null MAIL
2314 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2315 Whatever the result of the callout, the value of the domain cache is
2316 left unchanged (for any other kind of callout, getting as far as trying
2317 RCPT means that the domain itself is ok).
2319 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2322 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2323 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2324 session, the daemon ignores ECONNECT errors and logs others; it now
2325 ignores EPIPE as well.
2327 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2328 (quoted-printable decoding).
2330 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2331 later the small subsequent patch to fix an introduced bug.
2333 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2335 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2337 PH/08 An error is now given if message_size_limit is specified negative.
2339 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2340 to be given (somewhat) arbitrary names.
2342 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2345 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2346 miscellaneous code fixes
2348 PH/10 Added the log_reject_target ACL modifier to specify where to log
2351 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2352 hostname. This is wrong, because it relates to the incoming message (and
2353 probably the interface on which it is arriving) and not to the outgoing
2354 callout (which could be using a different interface). This has been
2355 changed to use the value of the helo_data option from the smtp transport
2356 instead - this is what is used when a message is actually being sent. If
2357 there is no remote transport (possible with a router that sets up host
2358 addresses), $smtp_active_hostname is used.
2360 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2361 tweaks were necessary in order to get it to work (see also 21 below):
2362 (a) The code assumed that strncpy() returns a negative number on buffer
2363 overflow, which isn't the case. Replaced with Exim's string_format()
2365 (b) There were several signed/unsigned issues. I just did the minimum
2366 hacking in of casts. There is scope for a larger refactoring.
2367 (c) The code used strcasecmp() which is not a standard C function.
2368 Replaced with Exim's strcmpic() function.
2369 (d) The code set only $1; it now sets $auth1 as well.
2370 (e) A simple test gave the error "authentication client didn't specify
2371 service in request". It would seem that Dovecot has changed its
2372 interface. Fortunately there's a specification; I followed it and
2373 changed what the client sends and it appears to be working now.
2375 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2378 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2379 address A is aliased to B and C, where B exists and C does not. Without
2380 -v the output is "A verified" because verification stops after a
2381 successful redirection if more than one address is generated. However,
2382 with -v the child addresses are also verified. Exim was outputting "A
2383 failed to verify" and then showing the successful verification for C,
2384 with its parentage. It now outputs "B failed to verify", showing B's
2385 parentage before showing the successful verification of C.
2387 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2388 look up a TXT record in a specific list after matching in a combined
2391 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2392 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2393 they consult the DNS. I had assumed they would set it the way they
2394 wanted; and indeed my experiments on Linux seem to show that in some
2395 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2396 To be on the safe side, however, I have now made the interface to
2397 host_find_byname() similar to host_find_bydns(), with an argument
2398 containing the DNS resolver options. The host_find_byname() function now
2399 sets these options at its start, just as host_find_bydns() does. The smtp
2400 transport options dns_qualify_single and dns_search_parents are passed to
2401 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2402 of host_find_byname() use the default settings of RES_DEFNAMES
2403 (qualify_single) but not RES_DNSRCH (search_parents).
2405 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2406 spool_read_header() do less string testing, by means of a preliminary
2407 switch on the second character of optional "-foo" lines. (This is
2408 overdue, caused by the large number of possibilities that now exist.
2409 Originally there were few.) While I was there, I also converted the
2410 str(n)cmp tests so they don't re-test the leading "-" and the first
2411 character, in the hope this might squeeze out yet more improvement.
2413 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2414 flag allowing group syntax was set by the header_syntax check but not
2415 turned off, possible causing trouble later; (2) The flag was not being
2416 set at all for the header_verify test, causing "group"-style headers to
2417 be rejected. I have now set it in this case, and also caused header_
2418 verify to ignore an empty address taken from a group. While doing this, I
2419 came across some other cases where the code for allowing group syntax
2420 while scanning a header line wasn't quite right (mostly, not resetting
2421 the flag correctly in the right place). These bugs could have caused
2422 trouble for malformed header lines. I hope it is now all correct.
2424 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2425 with the "reply" argument non-NULL. The code, however (which originally
2426 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2427 but it didn't always do it. This confused somebody who was copying the
2428 code for some other use. I have removed all the tests.
2430 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2431 feature that was used to support insecure browsers during the U.S. crypto
2432 embargo. It requires special client support, and Exim is probably the
2433 only MTA that supported it -- and would never use it because real RSA is
2434 always available. This code has been removed, because it had the bad
2435 effect of slowing Exim down by computing (never used) parameters for the
2436 RSA_EXPORT functionality.
2438 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2439 authenticator to fail if there's a tab character in the incoming data
2440 (there should never be unless someone is messing about, as it's supposed
2441 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2442 if the connection is using TLS or if the remote IP is the same as the
2443 local IP, and the "valid-client-cert option" if a client certificate has
2446 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2447 authenticators. This can be used for authorization after authentication
2448 succeeds. (In the case of plaintext, it servers for both authentication
2451 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2452 if any retry times were supplied.
2454 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2455 connection, where there is no client IP address to check. In this
2456 situation, the verify now always succeeds.
2458 PH/25 Applied John Jetmore's -Mset patch.
2460 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2462 PH/27 In a string expansion for a processed (not raw) header when multiple
2463 headers of the same name were present, leading whitespace was being
2464 removed from all of them, but trailing whitespace was being removed only
2465 from the last one. Now trailing whitespace is removed from each header
2466 before concatenation. Completely empty headers in a concatenation (as
2467 before) are ignored.
2469 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2470 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2472 PH/29 [Removed. This was a change that I later backed out, and forgot to
2473 correct the ChangeLog entry (that I had efficiently created) before
2474 committing the later change.]
2476 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2477 address errors (4xx response to RCPT) over the same connection as other
2478 messages routed to the same hosts. Such deliveries are always "forced",
2479 so retry times are not inspected. This resulted in far too many retries
2480 for the affected addresses. The effect occurred only when there were more
2481 hosts than the hosts_max_try setting in the smtp transport when it had
2482 the 4xx errors. Those hosts that it had tried were not added to the list
2483 of hosts for which the message was waiting, so if all were tried, there
2484 was no problem. Two fixes have been applied:
2486 (i) If there are any address or message errors in an SMTP delivery, none
2487 of the hosts (tried or untried) are now added to the list of hosts
2488 for which the message is waiting, so the message should not be a
2489 candidate for sending over the same connection that was used for a
2490 successful delivery of some other message. This seems entirely
2491 reasonable: after all the message is NOT "waiting for some host".
2492 This is so "obvious" that I'm not sure why it wasn't done
2493 previously. Hope I haven't missed anything, but it can't do any
2494 harm, as the worst effect is to miss an optimization.
2496 (ii) If, despite (i), such a delivery is accidentally attempted, the
2497 routing retry time is respected, so at least it doesn't keep
2498 hammering the server.
2500 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2501 in ${readsocket because some servers need this prod.
2503 PH/32 Added some extra debug output when updating a wait-xxx database.
2505 PH/33 The hint "could be header name not terminated by colon", which has been
2506 given for certain expansion errors for a long time, was not being given
2507 for the ${if def:h_colon_omitted{... case.
2509 PH/34 The spec says: "With one important exception, whenever a domain list is
2510 being scanned, $domain contains the subject domain." There was at least
2511 one case where this was not true.
2513 PH/35 The error "getsockname() failed: connection reset by peer" was being
2514 written to the panic log as well as the main log, but it isn't really
2515 panic-worthy as it just means the connection died rather early on. I have
2516 removed the panic log writing for the ECONNRESET error when getsockname()
2519 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2520 runs only) independently of the message's sender address. This meant
2521 that, if the 4xx error was in fact related to the sender, a different
2522 message to the same recipient with a different sender could confuse
2523 things. In particular, this can happen when sending to a greylisting
2524 server, but other circumstances could also provoke similar problems.
2525 I have changed the default so that the retry time for these errors is now
2526 based a combination of the sender and recipient addresses. This change
2527 can be overridden by setting address_retry_include_sender=false in the
2530 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2531 remote server are returned as part of bounce messages. This was not
2532 happening for LMTP over a pipe (the lmtp transport), but now it is the
2533 same for both kinds of LMTP.
2535 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2536 in header lines that were in fact CNAMEs. This is no longer the case.
2538 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2539 and queue runs started by the daemon processed all messages. This has
2540 been fixed so that -R and -S can now usefully be given with -q<time>.
2542 PH/40 Import PCRE release 6.7 (fixes some bugs).
2544 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2546 PH/42 Give an error if -q is specified more than once.
2548 PH/43 Renamed the variables $interface_address and $interface_port as
2549 $received_ip_address and $received_port, to make it clear that these
2550 values apply to message reception, and not to the outgoing interface when
2551 a message is delivered. (The old names remain recognized, of course.)
2553 PH/44 There was no timeout on the connect() call when using a Unix domain
2554 socket in the ${readsocket expansion. There now is.
2556 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2557 be meaningful with "accept".
2559 SC/01 Eximstats V1.43
2560 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2562 SC/02 Eximstats V1.44
2563 Use a glob alias rather than an array ref in the generated
2564 parser. This improves both readability and performance.
2566 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2567 Collect SpamAssassin and rejection statistics.
2568 Don't display local sender or destination tables unless
2569 there is data to show.
2570 Added average volumes into the top table text output.
2572 SC/04 Eximstats V1.46
2573 Collect data on the number of addresses (recipients)
2574 as well as the number of messages.
2576 SC/05 Eximstats V1.47
2577 Added 'Message too big' to the list of mail rejection
2578 reasons (thanks to Marco Gaiarin).
2580 SC/06 Eximstats V1.48
2581 Mainlog lines which have GMT offsets and are too short to
2582 have a flag are now skipped.
2584 SC/07 Eximstats V1.49 (Alain Williams)
2585 Added the -emptyok flag.
2587 SC/08 Eximstats V1.50
2588 Fixes for obtaining the IP address from reject messages.
2590 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2591 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2592 whitespace changes from 4.64-PH/27
2594 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2597 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2598 are found, allow negative numbers in numeric criteria)
2600 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2602 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2603 to match changes made in 4.64-PH/43
2605 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2607 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2608 "domain" is actually an IP address, and force a failure. This locks out
2609 those revolvers/nameservers that support "A-for-A" lookups, in
2610 contravention of the specifications.
2612 PH/48 When a host name was looked up from an IP address, and the subsequent
2613 forward lookup of the name timed out, the host name was left in
2614 $sender_host_name, contrary to the specification.
2616 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2617 restricted to single-key lookups, Exim was not diagnosing an error if
2618 * or *@ was used with a query-style lookup.
2620 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2622 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2623 long ago, but noone interested enough thought of it. Let's just say that
2624 the "1.1" means that there are some new functions that weren't there at
2625 some point in the past.
2627 PH/51 Error processing for expansion failure of helo_data from an smtp
2628 transport during callout processing was broken.
2630 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2631 tested/used via the -bh/-bhc/-bs options.
2633 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2634 bug, fixed in subsequent PCRE releases).
2636 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2637 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2639 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2645 SC/01 Use a glob alias rather than an array ref in eximstats generated
2646 parser. This improves both readability and performance.
2648 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2649 Don't display local sender or destination tables in eximstats unless
2650 there is data to show.
2651 Added average volumes into the eximstats top table text output.
2653 SC/03 Collect data on the number of addresses (recipients) as well
2654 as the number of messages in eximstats.
2656 TF/01 Correct an error in the documentation for the redirect router. Exim
2657 does (usually) call initgroups() when daemonizing.
2659 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2660 with consistent privilege compared to when running as a daemon.
2662 TF/03 Note in the spec that $authenticated_id is not set for local
2663 submissions from trusted users.
2665 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2666 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2668 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2669 by adding some example configuration directives to the default
2670 configuration file. A little bit of work is required to uncomment the
2671 directives and define how usernames and passwords are checked, but
2672 there is now a framework to start from.
2674 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2675 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2676 without this. I don't know how relevant this is to other LDAP libraries.
2678 PH/02 Add the verb name to the "unknown ACL verb" error.
2680 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2682 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2684 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2685 directory not expanded when it should be if an expanded home directory
2686 was set for the address (which is overridden by the transport).
2688 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2691 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2692 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2693 because it is too late at that time, and has no effect.
2695 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2696 security issue with \' (bugzilla #107). I could not use the
2697 PQescapeStringConn() function, because it needs a PGconn value as one of
2700 PH/08 When testing addresses using -bt, indicate those final addresses that
2701 are duplicates that would not cause an additional delivery. At least one
2702 person was confused, thinking that -bt output corresponded to deliveries.
2703 (Suppressing duplicates isn't a good idea as you lose the information
2704 about possibly different redirections that led to the duplicates.)
2706 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2707 systems where poll() doesn't work, in particular OS X.
2709 PH/10 Added more information to debugging output for retry time not reached.
2711 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2712 operations in malware.c.
2714 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2717 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2718 syslog_duplication set false, log lines that would normally be written
2719 both the the main log and to the reject log were not written to syslog at
2722 PH/14 In the default configuration, change the use of "message" in ACL warn
2723 statements to "add_header".
2725 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2726 not followed by a command (e.g. "seen endif").
2728 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2729 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2732 PH/17 Added extra conditions to the default value of delay_warning_condition
2736 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2737 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2738 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2741 The Auto-Submitted: and various List- headers are standardised, whereas I
2742 don't think Precedence: ever was.
2744 PH/18 Refactored debugging code in route_finduser() to show more information,
2745 in particular, the error code if getpwnam() issues one.
2747 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2748 This is apparently needed in addition to the PH/07 change above to avoid
2749 any possible encoding problems.
2751 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2752 but not after initializing Perl.
2754 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2755 output them only if debugging. By default they are written stderr,
2756 apparently, which is not desirable.
2758 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2761 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2764 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2766 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2767 authenticated or an ident call has been made. Suppress the default
2768 values for $authenticated_id and $authenticated_sender (but permit -oMai
2769 and -oMas) when testing with -bh.
2771 PH/24 Re-jigged the order of the tests in the default configuration so that the
2772 tests for valid domains and recipients precede the DNS black list and CSA
2773 tests, on the grounds that those ones are more expensive.
2775 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2776 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2777 This bug exists in every version of Exim that I still have, right back to
2780 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2781 However, an attempt to turn on case-sensitivity in a regex key by
2782 including (?-i) didn't work because the subject string was already
2783 lowercased, and the effects were non-intuitive. It turns out that a
2784 one-line patch can be used to allow (?-i) to work as expected.
2790 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2791 other effects) broke the use of negated acl sub-conditions.
2793 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2796 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2797 "Deny" causes Exim to reject the incoming connection with a 554 error.
2798 Unfortunately, if there is a major crisis, such as a disk failure,
2799 tcp-wrappers gives "deny", whereas what one would like would be some
2800 kind of temporary error. A kludge has been added to help with this.
2801 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2802 554 error is used if errno is still zero or contains ENOENT (which occurs
2803 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2806 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2808 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2809 errors. Otherwise a message that provokes a temporary error (when other
2810 messages do not) can cause a whole host to time out.
2812 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2813 addresses were routed directly to files or pipes from a redirect router.
2814 File deliveries just didn't batch; pipe deliveries might have suffered
2817 PH/06 A failure to get a lock for a hints database would erroneously always say
2818 "Failed to get write lock", even when it was really a read lock.
2820 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2821 of 0600. This has been changed to use the value of the lockfile_mode
2822 option (which defaults to 0600).
2824 PH/08 Applied small patch from the Sieve maintainer.
2826 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2827 folder from quota calculations, a direct delivery into this folder messed
2828 up the contents of the maildirsize file. This was because the regex was
2829 used only to exclude .Trash (or whatever) when the size of the mailbox
2830 was calculated. There was no check that a delivery was happening into an
2831 excluded directory. This bug has been fixed by ignoring all quota
2832 processing for deliveries into excluded directories.
2834 PH/10 Added the maildirfolder_create_regex option to appendfile.
2840 PH/01 The code for finding all the local interface addresses on a FreeBSD
2841 system running IPv6 was broken. This may well have applied to all BSD
2842 systems, as well as to others that have similar system calls. The broken
2843 code found IPv4 interfaces correctly, but gave incorrect values for the
2844 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2845 that it would not match correctly against @[] and not recognize the IPv6
2848 PH/02 The ipliteral router was not recognizing addresses of the form user@
2849 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2851 PH/03 Added disable_ipv6.
2853 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2854 decoded form, because it is most often used to construct To: headers
2855 lines in autoreplies, and the decoded form may well be syntactically
2856 invalid. However, $reply_address has leading white space removed, and all
2857 newlines turned into spaces so that the autoreply transport does not
2860 PH/05 If group was specified without a user on a router, and no group or user
2861 was specified on a transport, the group from the router was ignored.
2863 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2864 for visible compile-time settings that can be used to change these
2865 numbers, for those that want even more. Backwards compatibility with old
2866 spool files has been maintained. However, going back to a previous Exim
2867 release will lost any variables that are in spool files.
2869 PH/07 Two small changes when running in the test harness: increase delay when
2870 passing a TCP/IP connection to a new process, in case the original
2871 process has to generate a bounce, and remove special handling of
2872 127.0.0.2 (sic), which is no longer necessary.
2874 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2875 be the same on different OS.
2877 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2880 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2881 whether --show-vars was specified or not
2883 JJ/02 exipick: Added support for new ACL variable spool format introduced
2886 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2887 syntactically invalid From: or Reply-to: line, and a filter used this to
2888 generate an autoreply, and therefore failed to obtain an address for the
2889 autoreply, Exim could try to deliver to a non-existent relative file
2890 name, causing unrelated and misleading errors. What now happens is that
2891 it logs this as a hard delivery error, but does not attempt to create a
2894 PH/11 The exinext utility has a -C option for testing purposes, but although
2895 the given file was scanned by exinext itself; it wasn't being passed on
2896 when Exim was called.
2898 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2899 an end-of-file indication when reading a command response.
2901 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2902 compiled. In many other places in Exim, IPv6 addresses are always
2903 recognized, so I have changed this. It also means that IPv4 domain
2904 literals of the form [IPV4:n.n.n.n] are now always recognized.
2906 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2907 used if the router is not running as root, for example, when verifying at
2908 ACL time, or when using -bh. The debugging output from this situation was
2909 non-existent - all you got was a failure to exec. I have made two
2912 (a) Failures to set uid/gid, the current directory, or a process leader
2913 in a subprocess such as that created by queryprogram now generate
2914 suitable debugging output when -d is set.
2916 (b) The queryprogram router detects when it is not running as root,
2917 outputs suitable debugging information if -d is set, and then runs
2918 the subprocess without attempting to change uid/gid.
2920 PH/15 Minor change to Makefile for building test_host (undocumented testing
2923 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2924 additional section of a DNS packet that returns MX or SRV records.
2925 Instead, it always explicitly searches for A/AAAA records. This avoids
2926 major problems that occur when a DNS server includes only records of one
2927 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2928 fixed another bug: if SRV records were looked up and the corresponding
2929 address records were *not* found in the additional section, the port
2930 values from the SRV records were lost.
2932 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2933 using the correct key (the original address) when searching the retry
2934 rules in order to find which one to use for generating the retry hint.
2936 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2937 adding the default one. Similarly, if it contains a Reply-To: header, the
2938 errors_reply_to option, if set, is not used.
2940 PH/19 When calculating a retry time, Exim used to measure the "time since
2941 failure" by looking at the "first failed" field in the retry record. Now
2942 it does not use this if it is later than than the arrival time of the
2943 message. Instead it uses the arrival time. This makes for better
2944 behaviour in cases where some deliveries succeed, thus re-setting the
2945 "first failed" field. An example is a quota failure for a huge message
2946 when small messages continue to be delivered. Without this change, the
2947 "time since failure" will always be short, possible causing more frequent
2948 delivery attempts for the huge message than are intended.
2949 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2951 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2952 $1, $2, $3) because the numerical variables can be reset during some
2953 expansion items (e.g. "match"), thereby losing the authentication data.
2955 PH/21 Make -bV show the size of off_t variables so that the test suite can
2956 decide whether to run tests for quotas > 2G.
2958 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2959 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2960 filecount value is greater than 2G or if a quota value is greater than 2G
2961 on a system where the size of off_t is not greater than 4, a panic error
2964 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2965 never match. The debug and -bh output now contains an explicit error
2966 message indicating a malformed IPv4 address or mask.
2968 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2969 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2970 PH/23 above applies.
2972 PH/25 Do not write to syslog when running in the test harness. The only
2973 occasion when this arises is a failure to open the main or panic logs
2974 (for which there is an explicit test).
2976 PH/26 Added the /no_tell option to "control=freeze".
2978 PH/27 If a host name lookup failed very early in a connection, for example, if
2979 the IP address matched host_lookup and the reverse lookup yielded a name
2980 that did not have a forward lookup, an error message of the form "no IP
2981 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2982 could be logged. Now it outputs the IP address instead of "NULL".
2984 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2985 allows the sender and the authenticated sender to be set when
2986 submitting a message from within Exim. Since child_open_exim() is
2987 documented for local_scan(), the new function should be too.
2989 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2990 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2991 results in an empty string is now treated as unset.
2993 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2995 PH/31 Added sender_verify_fail logging option.
2997 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2998 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2999 tidied the source and removed it altogether.
3001 PH/33 When a queue run was abandoned because the load average was too high, a
3002 log line was always written; now it is written only if the queue_run log
3003 selector is set. In addition, the log line for abandonment now contains
3004 information about the queue run such as the pid. This is always present
3005 in "start" and "stop" lines but was omitted from the "abandon" line.
3007 PH/34 Omit spaces between a header name and the colon in the error message that
3008 is given when verify = headers_syntax fails (if there are lots of them,
3009 the message gets confusing).
3011 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3012 names, as there are now some PTR records that contain slashes. This check
3013 is only to protect against broken name servers that fall over on strange
3014 characters, so the fact that it applies to all lookups doesn't matter.
3016 PH/36 Now that the new test suite is complete, we can remove some of the
3017 special code in Exim that was needed for the old test suite. For example,
3018 sorting DNS records because real resolvers return them in an arbitrary
3019 order. The new test suite's fake resolver always returns records in the
3022 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3023 bounces) except when queue_only is set, to avoid logging races between
3024 the different processes.
3026 PH/38 Panic-die if .include specifies a non-absolute path.
3028 PH/39 A tweak to the "H" retry rule from its user.
3030 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3031 a label. They prevented compilation on older perls.
3033 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3034 a warning to be raised on newish perls.
3036 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3037 on queue. Changes to match documented behaviour of showing count of
3038 messages matching specified criteria.
3040 PH/40 Changed the default ident timeout from 30s to 5s.
3042 PH/41 Added support for the use of login_cap features, on those BSD systems
3043 that have them, for controlling the resources used by pipe deliveries.
3045 PH/42 The content-scanning code uses fopen() to create files in which to put
3046 message data. Previously it was not paying any attention to the mode of
3047 the files. Exim runs with umask(0) because the rest of the code creates
3048 files with open(), and sets the required mode explicitly. Thus, these
3049 files were ending up world-writeable. This was not a big issue, because,
3050 being within the spool directory, they were not world-accessible. I have
3051 created a function called modefopen, which takes an additional mode
3052 argument. It sets umask(777), creates the file, chmods it to the required
3053 mode, then resets the umask. All the relevant calls to fopen() in the
3054 content scanning code have been changed to use this function.
3056 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3057 to 24 hours. This avoids potential overflow problems when processing G
3058 and H retry rules. I suspect nobody ever tinkers with this value.
3060 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3062 PH/45 When the plaintext authenticator is running as a client, the server's
3063 challenges are checked to ensure they are valid base64 strings. By
3064 default, the authentication attempt is cancelled if an invalid string is
3065 received. Setting client_ignore_invalid_base64 true ignores these errors.
3066 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3067 they are received. Thus, the responses can be made to depend on the
3068 challenges. If an invalid string is ignored, an empty string is placed in
3071 PH/46 Messages that are created by the autoreply transport now contains a
3072 References: header, in accordance with RFCs 2822 and 3834.
3074 PH/47 Added authenticated_sender_force to the smtp transport.
3076 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3078 PH/49 Installed latest patch from the Sieve maintainer.
3080 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3081 was also set, the appendfile transport was unnecessarily scanning a
3082 directory of message files (e.g. for maildir delivery) to find the count
3083 of files (along with the size), even though it did not need this
3084 information. It now does the scan only if it needs to find either the
3085 size of the count of files.
3087 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3089 PH/52 Two bugs concerned with error handling when the smtp transport is
3092 (i) Exim was not creating retry information for temporary errors given
3093 for individual recipients after the DATA command when the smtp transport
3094 was used in LMTP mode. This meant that they could be retried too
3095 frequently, and not timed out correctly.
3097 (ii) Exim was setting the flag that allows error details to be returned
3098 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3099 recipients that were returned after the DATA command.
3101 PH/53 This is related to PH/52, but is more general: for any failing address,
3102 when detailed error information was permitted to be returned to the
3103 sender, but the error was temporary, then after the final timeout, only
3104 "retry timeout exceeded" was returned. Now it returns the full error as
3105 well as "retry timeout exceeded".
3107 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3108 do this, and (what is worse) MTAs that accept it.
3110 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3111 will now be deprecated.
3113 PH/56 New os.c-cygwin from the Cygwin maintainer.
3115 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3116 formats (previously only available in exim formats via -bpr, -bpru,
3117 and -bpra. Now also available in native and exiqgrep formats)
3119 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3120 with very large, slow to parse queues
3122 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3124 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3126 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3127 responses to authentication challenges, though it was showing the
3128 challenges; (ii) I've removed the CR characters from the debug output for
3131 PH/58 Allow for the insertion of a newline as well as a space when a string
3132 is turned into more than one encoded-word during RFC 2047 encoding. The
3133 Sieve code now uses this.
3135 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3136 data_4xx, lost_connection, tls_required.
3138 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3139 message was being sent as an SMTP response.
3141 PH/61 Add -l and -k options to exicyclog.
3143 PH/62 When verifying, if an address was redirected to one new address, so that
3144 verification continued, and the new address failed or deferred after
3145 having set something in $address_data, the value of $address_data was not
3146 passed back to the ACL. This was different to the case when no
3147 redirection occurred. The value is now passed back in both cases.
3149 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3150 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3151 use login_cap.h, so on its own it isn't the distinguishing feature. The
3152 new name refers directly to the setclassresources() function.
3154 PH/65 Added configuration files for NetBSD3.
3156 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3158 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3159 is preferred over IPv4.
3161 PH/68 The bounce_return_message and bounce_return_body options were not being
3162 honoured for bounces generated during the reception of non-SMTP messages.
3163 In particular, this applied to messages rejected by the ACL. This bug has
3164 been fixed. However, if bounce_return_message is true and bounce_return_
3165 body is false, the headers that are returned for a non-SMTP message
3166 include only those that have been read before the error was detected.
3167 (In the case of an ACL rejection, they have all been read.)
3169 PH/69 The HTML version of the specification is now built in a directory called
3170 spec_html instead of spec.html, because the latter looks like a path with
3171 a MIME-type, and this confuses some software.
3173 PH/70 Catch two compiler warnings in sieve.c.
3175 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3176 function verify_get_ident() calls ip_connect() to connect a socket, but
3177 if the "connect()" function timed out, ip_connect() used to close the
3178 socket. However, verify_get_ident() also closes the socket later, and in
3179 between Exim writes to the log, which may get opened at this point. When
3180 the socket was closed in ip_connect(), the log could get the same file
3181 descriptor number as the socket. This naturally causes chaos. The fix is
3182 not to close the socket in ip_connect(); the socket should be closed by
3183 the function that creates it. There was only one place in the code where
3184 this was missing, in the iplookup router, which I don't think anybody now
3185 uses, but I've fixed it anyway.
3187 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3188 well as to direct DNS lookups. Otherwise the handling of names in host
3189 lists is inconsistent and therefore confusing.
3195 PH/01 Two changes to the default runtime configuration:
3197 (1) Move the checks for relay_from_hosts and authenticated clients from
3198 after to before the (commented out) DNS black list checks.
3200 (2) Add control=submission to the relay_from_hosts and authenticated
3201 clients checks, on the grounds that messages accepted by these
3202 statements are most likely to be submissions.
3204 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3206 (1) Generate an error if the third argument for the ${prvs expansion is
3209 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3212 (3) Reset the variables that are obtained from the first argument of
3213 ${prvscheck and used in the second argument before leaving the code,
3214 because their memory is reclaimed, so using them afterwards may do
3217 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3218 one (it's much easier than Tom thought :-).
3220 (5) Because of (4), we can now allow for the use of $prvscheck_result
3221 inside the third argument.
3223 PH/03 For some reason, the default setting of PATH when running a command from
3224 a pipe transport was just "/usr/bin". I have changed it to
3227 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3228 anything to be listed in the output from -bV.
3230 PH/05 When a filter generated an autoreply, the entire To: header line was
3231 quoted in the delivery log line, like this:
3233 => >A.N.Other <ano@some.domain> <original@ddress> ...
3235 This has been changed so that it extracts the operative address. There
3236 may be more than one such address. If so, they are comma-separated, like
3239 => >ano@some.domain,ona@other.domain <original@ddress> ...
3241 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3242 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3243 not being looked up in the rDNS to get a host name, Exim was showing the
3244 IP address twice in Received: lines, even though the IP addresses were
3245 identical. For example:
3247 Received: from [1.2.3.4] (helo=[1.2.3.4])
3249 However, if the real host name was known, it was omitting the HELO data
3250 if it matched the actual IP address. This has been tidied up so that it
3251 doesn't show the same IP address twice.
3253 PH/07 When both +timestamp and +memory debugging was on, the value given by
3254 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3255 called by the debug printing, thereby overwriting the timestamp buffer.
3256 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3258 PH/08 When the original message was included in an autoreply transport, it
3259 always said "this is a copy of the message, including all the headers",
3260 even if body_only or headers_only was set. It now gives an appropriate
3263 PH/09 Applied a patch from the Sieve maintainer which:
3265 o fixes some comments
3266 o adds the (disabled) notify extension core
3267 o adds some debug output for the result of if/elsif tests
3268 o points to the current vacation draft in the documentation
3269 and documents the missing references header update
3273 o fixes a bug in processing the envelope test (when testing
3274 multiple envelope elements, the last element determined the
3277 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3278 Electronic Mail") by including:
3280 Auto-submitted: auto-generated
3282 in the messages that it generates (bounce messages and others, such as
3283 warnings). In the case of bounce messages for non-SMTP messages, there was
3284 also a typo: it was using "Auto_submitted" (underscore instead of
3285 hyphen). Since every message generated by Exim is necessarily in response
3286 to another message, thes have all been changed to:
3288 Auto-Submitted: auto-replied
3290 in accordance with these statements in the RFC:
3292 The auto-replied keyword:
3294 - SHOULD be used on messages sent in direct response to another
3295 message by an automatic process,
3297 - MUST NOT be used on manually-generated messages,
3299 - MAY be used on Delivery Status Notifications (DSNs) and Message
3300 Disposition Notifications (MDNs),
3302 - MUST NOT be used on messages generated by automatic or periodic
3303 processes, except for messages which are automatic responses to
3306 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3307 to the default Received: header definition.
3309 PH/12 Added log selector acl_warn_skipped (default on).
3311 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3312 variables because (a) they are in the wrong storage pool and (b) even if
3313 they were copied, it wouldn't work properly because of the caching.
3315 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3316 checking when decoding. Apparently there are clients that generate
3317 overlong encoded strings. Why am I not surprised?
3319 PH/15 If the first argument of "${if match_address" was not empty, but did not
3320 contain an "@" character, Exim crashed. Now it writes a panic log message
3321 and treats the condition as false.
3323 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3325 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3326 extension "envelope-auth". The code is finished and in agreement with
3327 other implementations, but there is no documentation so far and in fact,
3328 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3329 not changing the active code.
3331 Print executed "if" and "elsif" statements when debugging is used. This
3332 helps a great deal to understand what a filter does.
3334 Document more things not specified clearly in RFC3028. I had all this
3335 sorted out, when out of a sudden new issues came to my mind. Oops."
3337 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3340 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3341 canonical form (as documented). However, after a host name lookup from
3342 the IP address, check_host() was doing a simple string comparison with
3343 addresses acquired from the DNS when checking that the found name did
3344 have the original IP as one of its addresses. Since any found IPv6
3345 addresses are likely to be in abbreviated form, the comparison could
3346 fail. Luckily, there already exists a function for doing the comparison
3347 by converting both addresses to binary, so now that is used instead of
3348 the text comparison.
3350 PH/20 There was another similar case to PH/19, when a complete host name was
3351 given in a host list; looking up its IP address could give an abbreviated
3352 form, whereas the current host's name might or might not be abbreviated.
3353 The same fix has been applied.
3359 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3360 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3363 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3364 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3366 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3368 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3369 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3370 Also, for "Auto-Submitted", treat anything other than "no" as
3371 non-personal, in accordance with RFC 3834. (Previously it treated
3372 anything starting "auto-" as non-personal.)
3374 TF/01 The control=submission/name=... option had a problem with syntax
3375 errors if the name included a slash character. The /name= option
3376 now slurps the rest of the string, so it can include any characters
3377 but it must come last in the list of options (after /sender_retain
3380 PH/05 Some modifications to the interface to the fake nameserver for the new
3388 TK/01 Added the "success_on_redirect" address verification option. See
3389 NewStuff for rationale and an example.
3391 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3393 PH/02 Patch to exigrep to allow it to work on syslog lines.
3395 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3396 fread() to skip over the body file's header line, because in Cygwin the
3397 header line is locked and is inaccessible.
3399 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3400 co-exist for some time) to make it clear that it is the Exim ID that is
3401 referenced, not the Message-ID: header line.
3403 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3404 string_format() function, because snprintf() does not exist on all
3407 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3408 ${stat: expansion item.
3410 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3411 protocol synchronization error", to keep the pedants happy.
3413 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3414 well as for IRIX systems, when gcc is being used. See the host.c source
3417 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3419 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3422 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3423 transport and to the smtp transport in LMTP mode.
3425 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3427 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3428 run a filter in a subprocess. This could lead to confusion in subsequent
3429 lookups in the parent process. There should also be a search_tidyup() at
3430 the end of the subprocess.
3432 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3433 only if the host matched helo_try_verify_hosts, which caused the
3434 verification to occur when the EHLO/HELO command was issued. The ACL just
3435 tested the remembered result. Now, if a previous verification attempt has
3436 not happened, "verify = helo" does it there and then.
3438 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3440 TK/03 Fix log output including CR from clamd.
3442 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3443 exist provoked a memory error which could cause a segfault.
3445 PH/15 Installed PCRE 6.2
3447 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3449 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3450 of the problem. Specifically, suggested +O2 rather than +O1 for the
3453 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3455 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3456 record, the port was not correctly logged when the outgoing_port log
3457 selector was set (it logged the transort's default port).
3459 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3460 fallback_hosts, and "hosts" in the smtp transport.
3462 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3463 host errors such as "Connection refused".
3465 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3466 authentication with radiusclient 0.4.9:
3468 - Error returned from rc_read_config was caught wrongly
3469 - Username/password not passed on to radius server due to wrong length.
3471 The presumption is that some radiusclient API changes for 4.51/PH/17
3472 were not taken care of correctly. The code is still untested by me (my
3473 Linux distribution still has 0.3.2 of radiusclient), but it was
3474 contributed by a Radius user.
3476 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3477 expanding the "port" option of the smtp transport.
3479 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3480 while reading a MIME header. Thanks to Tom Hughes for a patch.
3482 PH/24 Include config.h inside local_scan.h so that configuration settings are
3485 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3486 that in an ACL for RCPT (for example), you can examine exactly what was
3489 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3490 commands, but it was not correctly comparing the address with the actual
3491 client host address. Thus, it would show the EHLO address in Received:
3492 header lines when this was not necessary.
3494 PH/27 Added the % operator to ${eval:}.
3496 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3497 it should be ignoring failures (because with -C, for example, it has lost
3498 privilege). It wasn't ignoring creation failures other than "already
3501 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3504 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3505 because an input line was too long, either on its own, or by virtue of
3506 too many continuations, the temporary file was not being removed, and the
3507 return code was incorrect.
3509 PH/31 Missing "BOOL" in function definition in filtertest.c.
3511 PH/32 Applied Sieve patches from the maintainer.
3513 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3515 PH/33 Added "verify = not_blind".
3517 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3518 Local/Makefile (with some defaults set). These are used in built scripts
3519 such as exicyclog, but they have never been used in the exim_install
3520 script (though there are many overriding facilities there). I have
3521 arranged that the exim_install script now takes note of these two
3524 PH/35 Installed configuration files for Dragonfly.
3526 PH/36 When a locally submitted message by a trusted user did not contain a
3527 From: header, and the sender address was obtained from -f or from an SMTP
3528 MAIL command, and the trusted user did not use -F to supply a sender
3529 name, $originator_name was incorrectly used when constructing a From:
3530 header. Furthermore, $originator_name was used for submission mode
3531 messages from external hosts without From: headers in a similar way,
3532 which is clearly wrong.
3534 PH/37 Added control=suppress_local_fixups.
3536 PH/38 When log_selector = +received_sender was set, and the addition of the
3537 sender made the log line's construction buffer exactly full, or one byte
3538 less than full, an overflow happened when the terminating "\n" was
3541 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3542 when the result of a list match is failure because a DNS lookup failed.
3544 PH/40 RM_COMMAND is now used in the building process.
3546 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3547 the "build-* directories that it finds.
3549 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3550 address in a domain literal was a prefix of an interface address.
3552 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3553 when verifying a sender address, unless rewrite_headers is false.
3555 PH/44 Wrote a long comment about why errors_to addresses are verified as
3556 recipients, not senders.
3558 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3559 the ratelimit ACL was added.
3561 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3563 PH/46 Added extra information about PostgreSQL errors to the error string.
3565 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3566 avoiding the need to install special zones in a real server. This is
3567 backwards compatible; if it can't find the fake resolver, it drops back.
3568 Thus, both old and new test suites can be run.
3570 TF/02 Added util/ratelimit.pl
3572 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3573 clock is set back in time.
3575 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3576 Candler <B.Candler@pobox.com>.
3578 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3579 OK for addresses that are the result of redirections.
3581 PH/48 A number of further additions for the benefit of the new test suite,
3582 including a fake gethostbyname() that interfaces to the fake DNS resolver
3585 TF/06 The fix for widen_domains has also been applied to qualify_single and
3586 search_parents which are the other dnslookup options that can cause
3589 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3592 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3594 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3595 service" if it encountered an MX record with an empty target hostname.
3596 The message is now "an MX or SRV record indicated no SMTP service".
3598 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3599 if the DNS of the sending site is misconfigured. This is quite a
3600 common situation. This change restores the behaviour of treating a
3601 helo verification defer as a failure.
3603 PH/51 If self=fail was set on a router, the bounce message did not include the
3604 actual error message.
3610 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3612 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3613 command itself ended in error, the underlying message about the transport
3614 filter timeout was being overwritten with the pipe command error. Now the
3615 underlying error message should be appended to the second error message.
3617 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3619 PH/02 Reduce the amount of output that "make" produces by default. Full output
3620 can still be requested.
3622 PH/03 The warning log line about a condition test deferring for a "warn" verb
3623 was being output only once per connection, rather than after each
3624 occurrence (because it was using the same function as for successful
3625 "warn" verbs). This seems wrong, so I have changed it.
3627 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3628 it should not have, which might have caused a crash in the right
3629 circumstances, but probably never did.
3631 PH/04 Installed a modified version of Tony Finch's patch to make submission
3632 mode fix the return path as well as the Sender: header line, and to
3633 add a /name= option so that you can make the user's friendly name appear
3636 TF/03 Added the control = fakedefer ACL modifier.
3638 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3639 Mark Lowes for thorough testing.
3641 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3643 TK/03 Merged latest SRS patch from Miles Wilton.
3645 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3646 with the definition in sysexits.h (which is #included earlier).
3647 Fortunately, Exim does not actually use EX_OK. The code used to try to
3648 preserve the sysexits.h value, by assuming that macro definitions were
3649 scanned for macro replacements. I have been disabused of this notion,
3650 so now the code just undefines EX_OK before #including unistd.h.
3652 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3653 in the smtp transport. When a block could not be written in a single
3654 write() function, the timeout was being re-applied to each part-write.
3655 This seems wrong - if the receiver was accepting one byte at a time it
3656 would take for ever. The timeout is now adjusted when this happens. It
3657 doesn't have to be particularly precise.
3659 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3660 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3662 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3663 without a domain if the check to <postmaster@domain> fails.
3665 SC/01 Eximstats: added -xls and the ability to specify output files
3666 (patch written by Frank Heydlauf).
3668 SC/02 Eximstats: use FileHandles for outputting results.
3670 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3672 SC/04 Eximstats: fixed display of large numbers with -nvr option
3674 SC/05 Eximstats: fixed merging of reports with empty tables.
3676 SC/06 Eximstats: added the -include_original_destination flag
3678 SC/07 Eximstats: removed tabs and trailing whitespace.
3680 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3682 TK/06 MBOX spool code: Add real "From " MBOX separator line
3683 so the .eml file is really in mbox format (even though
3684 most programs do not really care). Patch from Alex Miller.
3686 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3687 The latter is generated from $received_to and is only set if the
3688 message has one envelope recipient. SA can use these headers,
3689 obviously out-of-the-box. Patch from Alex Miller.
3691 PH/08 The ${def test on a variable was returning false if the variable's
3692 value was "0", contrary to what the specification has always said!
3693 The result should be true unless the variable is empty.
3695 PH/09 The syntax error of a character other than { following "${if
3696 def:variable_name" (after optional whitespace) was not being diagnosed.
3697 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3698 accidental colon was present, for example, could give incorrect results.
3700 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3701 result is used (not including appendfile, where other changes are about
3704 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3705 This involved changing a lot of size variables from int to off_t. It
3706 should work with maildirs and everything.
3708 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3709 spamd dying while we are connected to it.
3711 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3714 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3715 function for BDB 4.3.
3717 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3719 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3720 the sources for PCRE have been re-arranged and more files are now
3723 PH/15 The code I had for printing potentially long long variables in PH/11
3724 above was not the best (it lost precision). The length of off_t variables
3725 is now inspected at build time, and an appropriate printing format (%ld
3726 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3727 to be "long long int" or "long int". This is needed for the internal
3728 formatting function string_vformat().
3730 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3731 the configuration file to be ":syslog", then the script "guesses" where
3732 the logs files are, rather than using the compiled in default. In our
3733 case the guess is not the same as the compiled default, so the script
3734 suddenly stopped working when I started to use syslog. The patch checks
3735 to see if log_file_path is "". If so, it attempts to read it from exim
3736 with no configuration file to get the compiled in version, before it
3737 falls back to the previous guessing code."
3739 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3740 implementing BATV in an Exim configuration. See NewStuff for the gory
3743 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3744 Makefile that are specific to HP-UX.
3746 PH/18 If the "use_postmaster" option was set for a recipient callout together
3747 with the "random" option, the postmaster address was used as the MAIL
3748 FROM address for the random test, but not for the subsequent recipient
3749 test. It is now used for both.
3751 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3752 patch removes a few documentation additions to RFC 3028, because the
3753 latest draft now contains them. It adds the new en;ascii-case comparator
3754 and a new error check for 8bit text in MIME parts. Comparator and
3755 require names are now matched exactly. I enabled the subaddress
3756 extension, but it is not well tested yet (read: it works for me)."
3758 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3759 rework some of the code of TK/09 above to avoid the hardwired use of
3760 "%lld" and "long long". Replaced the call to snprintf() with a call to
3763 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3764 records point to non-existent hosts", "retry timeout exceeded", and
3765 "retry time not reached for any host after a long failure period".
3767 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3768 experimental DomainKeys support:
3770 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3771 (2) On an error such as an illegally used "control", the wrong name for
3772 the control was given.
3774 These problems did NOT occur unless DomainKeys support was compiled.
3776 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3778 PH/24 Added ${if match_ip condition.
3780 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3781 databases so that it will be absolutely obvious if a crash occurs in the
3782 DB library. This is a regular occurrence (often caused by mis-matched
3785 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3786 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3787 picked up on a user's system that detects such things. There doesn't seem
3788 to be a gcc warning option for this - only an attribute that has to be
3789 put on the function's prototype. It seems that in Fedora Core 4 they have
3790 set this on a number of new functions. No doubt there will be more in due
3793 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3794 specify a transport. However, if an address that was verified by such a
3795 router was the subject of a callout, Exim crashed because it tried to
3796 read the rcpt_include_affixes from the non-existent transport. Now it
3797 just assumes that the setting of that option is false. This bug was
3798 introduced by 4.51/PH/31.
3800 PH/28 Changed -d+all to exclude +memory, because that information is very
3801 rarely of interest, but it makes the output a lot bigger. People tend to
3802 do -d+all out of habit.
3804 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3805 code in os-type was giving problems when libc.so lives in lib64, like on
3808 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3809 aren't the modern standard, and it seems that some systems' include files
3810 don't always have them. Exim was already checking for some of the newer
3811 ones like T_AAAA, and defining it itself. I've added checks for all the
3812 record types that Exim uses.
3814 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3815 not automatically generating a new one, as it is supposed to. This
3816 prevented TLS from working. If the file did exist, but contained invalid
3817 data, a new version was generated, as expected. It was only the case of a
3818 non-existent file that was broken.
3820 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3821 with a change in libdomainkeys > 0.64.
3823 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3824 from DNS. If the selector record carries the flag, it now has
3825 precedence over the domain-wide flag.
3827 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3829 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3830 the use of a port name that isn't defined in /etc/services) occurred, the
3831 message was deferred as in a normal delivery, and thus remained on the
3832 spool, instead of being failed because of the mua_wrapper setting. This
3833 is now fixed, and I tidied up some of the mua_wrapper messages at the
3836 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3837 the messages in a hash of arrays rather than using individual hashes.
3838 This is a bit cleaner and results in dramatic memory savings, albeit
3839 at a slight CPU cost.
3841 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3842 as requested by Marc Sherman.
3844 SC/10 Eximstats: added histograms for user specified patterns as requested
3847 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3849 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3850 fopen() in the content-scanning modules that did not already have it.
3856 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3857 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3859 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3861 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3863 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3864 to test Sieve filters that use "vacation".
3866 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3867 that changes the way the GnuTLS parameters are stored in the cache file.
3868 The new format can be generated externally. For backward compatibility,
3869 if the data in the cache doesn't make sense, Exim assumes it has read an
3870 old-format file, and it generates new data and writes a new file. This
3871 means that you can't go back to an older release without removing the
3874 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3875 work if there are any delivery delays because "one_time" forces the
3876 parent to be marked "delivered", so its unseen clone is never tried
3877 again. For this reason, Exim now forbids the simultaneous setting of
3880 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3881 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3882 entry if you want to know the details. The fix, however, neglected to
3883 consider the case when local delivery batching is involved. The test for
3884 "previously delivered" was not happening when checking to see if an
3885 address could be batched with a previous (undelivered) one; under
3886 certain circumstances this could lead to multiple deliveries to the same
3889 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3890 in its include files, and this causes problems building Exim.
3892 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3893 header_syntax) but Exim was just ignoring anything given after a slash.
3894 In particular, this caused confusion with an attempt to use "verify =
3895 reverse_host_lookup/defer_ok". An error is now given when options are
3896 supplied for verify items that do not have them. (Maybe reverse_host_
3897 lookup should have a defer_ok option, but that's a different point.)
3899 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3900 defined by RFC 821) to 2048, because there were problems with some AUTH
3901 commands, and RFC 1869 says the size should be increased for extended
3902 SMTP commands that take arguments.
3904 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3907 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3908 "unknown" error; now it says that the functionality isn't in the binary.
3910 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3911 an address' error message when a string expansion fails (syntax or
3912 whatever). Otherwise the password may appear in the log. Following change
3913 PH/42 below, there is no longer a chance of it appearing in a bounce
3916 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3918 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3919 of its addresses was ever tried. (Bugzilla bug #2.)
3921 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3922 the result incorrectly in the debug output. (It correctly added a newline
3923 to what was transported.)
3925 TF/01 Added $received_time.
3927 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3928 commented out examples of how to interface to a virus scanner and to
3929 SpamAssassin. Also added commented examples of av_scanner and
3930 spamd_address settings.
3932 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3933 and controls are allowed in which ACLs. There were a couple of minor
3934 errors. Some of the entries in the conditions table (which is a table of
3935 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3936 negation of where the condition IS allowed.
3938 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3940 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3941 header file does not have a version number, so I've had to invent a new
3942 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3943 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3944 radiusclient), but it was contributed by a Radius user.
3946 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3947 files or directories, for OpenSSL.
3949 PH/19 When an Exim process that is running as root has to create an Exim log
3950 file, it does so in a subprocess that runs as exim:exim so as to get the
3951 ownership right at creation (otherwise, other Exim processes might see
3952 the file with the wrong ownership). There was no test for failure of this
3953 fork() call, which would lead to the process getting stuck as it waited
3954 for a non-existent subprocess. Forks do occasionally fail when resources
3955 run out. I reviewed all the other calls to fork(); they all seem to check
3958 PH/20 When checking for unexpected SMTP input at connect time (before writing
3959 the banner), Exim was not dealing correctly with a non-positive return
3960 from the read() function. If the client had disconnected by this time,
3961 the result was a log entry for a synchronization error with an empty
3962 string after "input=" when read() returned zero. If read() returned -1
3963 (an event I could not check), uninitialized data bytes were printed.
3964 There were reports of junk text (parts of files, etc) appearing after
3967 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3969 PH/22 Added support for macro redefinition, and (re)definition in between
3970 driver and ACL definitions.
3972 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3973 forgetting to use the resulting value; it was using the unexpanded value.
3975 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3976 hadn't been configured. The fix is from Juergen Kreileder, who
3977 understands it better than I do:
3979 "Here's what I see happening with three configured cyrus_sasl
3980 authenticators configured (plain, login, cram-md5):
3982 On startup auth_cyrus_sasl_init() gets called for each of these.
3983 This means three calls to sasl_listmech() without a specified mech_list.
3984 => SASL tests which mechs of all available mechs actually work
3985 => three warnings about OTP not working
3986 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3988 With the patch, sasl_listmech() also gets called three times. But now
3989 SASL's mech_list option is set to the server_mech specified in the the
3990 authenticator. Or in other words, the answer from sasl_listmech()
3991 gets limited to just the mech you're testing for (which is different
3993 => the return list contains just 'plain' or 'login', 'cram-md5' or
3994 nothing depending on the value of ob->server_mech.
3996 I've just tested the patch: Authentication still works fine,
3997 unavailable mechs specified in the exim configuration are still
3998 caught, and the auth.log warnings about OTP are gone."
4000 PH/25 When debugging is enabled, the contents of the command line are added
4001 to the debugging output, even when log_selector=+arguments is not
4004 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4005 answer is "GNU", and only if the return is "GNU/something" is the answer
4008 PH/27 $acl_verify_message is now set immediately after the failure of a
4009 verification in an ACL, and so is available in subsequent modifiers. In
4010 particular, the message can be preserved by coding like this:
4012 warn !verify = sender
4013 set acl_m0 = $acl_verify_message
4015 Previously, $acl_verify_message was set only while expanding "message"
4016 and "log_message" when a very denied access.
4018 PH/28 Modified OS/os.c-Linux with
4020 -#ifndef OS_LOAD_AVERAGE
4021 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4023 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4024 nomenclature these days.)
4026 PH/29 Installed patch from the Sieve maintainer that adds the options
4027 sieve_useraddress and sieve_subaddress to the redirect router.
4029 PH/30 In these circumstances:
4030 . Two addresses routed to the same list of hosts;
4031 . First host does not offer TLS;
4032 . First host accepts first address;
4033 . First host gives temporary error to second address;
4034 . Second host offers TLS and a TLS session is established;
4035 . Second host accepts second address.
4036 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4037 and peerdn, if requested) that were in fact used only for the second
4040 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4041 attention to any local part prefix or suffix that was matched by the
4042 router that accepted the address. It now behaves in the same way as it
4043 does for delivery: the affixes are removed from the local part unless
4044 rcpt_include_affixes is set on the transport.
4046 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4047 timeout during the DATA phase of an incoming message.
4049 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4050 applied a patch sanctioned by the Sieve maintainer.
4052 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4053 the uid or gid is negative. A case of a negative gid caused this to be
4054 noticed. The fix allows for either to be negative.
4056 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4057 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4060 PH/36 The change PH/12 above was broken. Fixed it.
4062 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4063 the grounds that routing the same address twice would always produce the
4064 same answer. This might have been true once, but it is certainly no
4065 longer true now. Routing a child address may depend on the previous
4066 routing that produced that child. Some complicated redirection strategies
4067 went wrong when messages had multiple recipients, and made Exim's
4068 behaviour dependent on the order in which the addresses were given.
4070 I have moved the duplicate checking until after the routing is complete.
4071 Exim scans the addresses that are assigned to local and remote
4072 transports, and removes any duplicates. This means that more work will be
4073 done, as duplicates will always all be routed, but duplicates are
4074 presumably rare, so I don't expect this is of any significance.
4076 For deliveries to pipes, files, and autoreplies, the duplicate checking
4077 still happens during the routing process, since they are not going to be
4080 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4081 It corrects a timeout issue with spamd. This is Ian's comment: "The
4082 background is that sometimes spamd either never reads data from a
4083 connection it has accepted, or it never writes response data. The exiscan
4084 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4085 blindly assumes that writes won't block so it may never time out."
4087 PH/39 Allow G after quota size as well as K and M.
4089 PH/40 The value set for $authenticated_id in an authenticator may not contain
4090 binary zeroes or newlines because the value is written to log lines and
4091 to spool files. There was no check on this. Now the value is run through
4092 the string_printing() function so that such characters are converted to
4093 printable escape sequences.
4095 PH/41 $message_linecount is a new variable that contains the total number of
4096 lines in the message. Compare $body_linecount, which is the count for the
4099 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4100 bounce and delay warning messages, except in certain special cases, which
4103 (a) An SMTP error message from a remote host;
4104 (b) A message specified in a :fail: redirection;
4105 (c) A message specified in a "fail" command in a system filter;
4106 (d) A message specified in a FAIL return from the queryprogram router;
4107 (e) A message specified by the cannot_route_message router option.
4109 In these cases only, Exim does include the error details in bounce and
4110 warning messages. There are also a few cases where bland messages such
4111 as "unrouteable address" or "local delivery error" are given.
4113 PH/43 $value is now also set for the "else" part of a ${run expansion.
4115 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4116 being worked on, but at least Exim now implements the latest version to
4119 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4120 process to complete was treated as a delivery failure, a timeout while
4121 writing the message to the pipe was logged, but erroneously treated as a
4122 successful delivery. Such timeouts include transport filter timeouts. For
4123 consistency with the overall process timeout, these timeouts are now
4124 treated as errors, giving rise to delivery failures by default. However,
4125 there is now a new Boolean option for the pipe transport called
4126 timeout_defer, which, if set TRUE, converts the failures into defers for
4127 both kinds of timeout. A transport filter timeout is now identified in
4130 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4131 systems where "make" and "gmake" are different, calling "gmake" at top
4132 level broke things. I've arranged for the value of $(MAKE) to be passed
4133 from the Makefile to this script so that it can call the same version of
4137 A note about Exim versions 4.44 and 4.50
4138 ----------------------------------------
4140 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4141 changes of various kinds. As a consequence, a big documentation update was
4142 needed. This delayed the release for rather longer than seemed good, especially
4143 in the light of a couple of (minor) security issues. Therefore, the changes
4144 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4145 release. So 4.44 and 4.50 are in effect two different branches that both start
4148 I have left the 4.50 change log unchanged; it contains all the changes since
4149 4.43. The change log for 4.44 is below; many of its items are identical to
4150 those for 4.50. This seems to be the most sensible way to preserve the
4151 historical information.
4157 1. Minor wording change to the doc/README.SIEVE file.
4159 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4160 computation of the current number of files was incorrect.
4162 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4163 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4166 4. Give more explanation in the error message when the command for a transport
4167 filter fails to execute.
4169 5. There are several places where Exim runs a non-Exim command in a
4170 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4171 was being done only for the command run by the queryprogram router. It is
4172 now done for all such subprocesses. The other cases are: ${run, transport
4173 filters, and the commands run by the lmtp and pipe transports.
4175 6. Added CONFIGURE_GROUP build-time option.
4177 7. Some older OS have a limit of 256 on the maximum number of file
4178 descriptors. Exim was using setrlimit() to set 1000 as a large value
4179 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4180 systems. I've change it so that if it can't get 1000, it tries for 256.
4182 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4183 was an oversight, and furthermore, ever since the addition of extra
4184 controls (e.g. 4.43/32), the checks on when to allow different forms of
4185 "control" were broken. There should now be diagnostics for all cases when a
4186 control that does not make sense is encountered.
4188 9. Added the /retain_sender option to "control=submission".
4190 10. $recipients is now available in the predata ACL (oversight).
4192 11. Tidy the search cache before the fork to do a delivery from a message
4193 received from the command line. Otherwise the child will trigger a lookup
4194 failure and thereby defer the delivery if it tries to use (for example) a
4195 cached ldap connection that the parent has called unbind on.
4197 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4198 of $address_data from the recipient verification was clobbered by the
4199 sender verification.
4201 13. The value of address_data from a sender verification is now available in
4202 $sender_address_data in subsequent conditions in the ACL statement.
4204 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4206 15. Added a new option "connect=<time>" to callout options, to set a different
4209 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4210 was its contents. (It was OK if the option was not defined at all.)
4212 17. A "Completed" log line is now written for messages that are removed from
4213 the spool by the -Mrm option.
4215 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4216 information about exactly what failed.
4218 19. Added -dd to debug only the daemon process.
4220 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4221 handles timeouts, both on the server side and network timeouts. Renamed the
4222 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4224 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4225 It is now set to "smtps".
4227 22. $host_address is now set to the target address during the checking of
4228 ignore_target_hosts.
4230 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4231 being passed; this would have caused $sender_host_name to have been used if
4232 matching the list had actually called for a host name (not very likely,
4233 since this list is usually IP addresses). A host name is now passed as
4236 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4237 code that specifies a non-restarting handler (typically sigaction() in
4238 modern systems) in an attempt to fix a rare and obscure crash bug.
4240 25. Narrowed the window for a race in the daemon that could cause it to ignore
4241 SIGCHLD signals. This is not a major problem, because they are used only to
4242 wake it up if nothing else does.
4244 26. A malformed maildirsize file could cause Exim to calculate negative values
4245 for the mailbox size or file count. Odd effects could occur as a result.
4246 The maildirsize information is now recalculated if the size or filecount
4249 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4250 support for a long time. Removed HAVE_SYS_VFS_H.
4252 28. Installed the latest version of exipick from John Jetmore.
4254 29. In an address list, if the pattern was not a regular expression, an empty
4255 subject address (from a bounce message) matched only if the pattern was an
4256 empty string. Non-empty patterns were not even tested. This was the wrong
4257 because it is perfectly reasonable to use an empty address as part of a
4258 database query. An empty address is now tested by patterns that are
4259 lookups. However, all the other forms of pattern expect the subject to
4260 contain a local part and a domain, and therefore, for them, an empty
4261 address still always fails if the pattern is not itself empty.
4263 30. Exim went into a mad DNS loop when attempting to do a callout where the
4264 host was specified on an smtp transport, and looking it up yielded more
4265 than one IP address.
4267 31. Re-factored the code for checking spool and log partition space into a
4268 function that finds that data and another that does the check. The former
4269 is then used to implement four new variables: $spool_space, $log_space,
4270 $spool_inodes, and $log_inodes.
4272 32. The RFC2047 encoding function was originally intended for short strings
4273 such as real names; it was not keeping to the 75-character limit for
4274 encoded words that the RFC imposes. It now respects the limit, and
4275 generates multiple encoded words if necessary. To be on the safe side, I
4276 have increased the buffer size for the ${rfc2047: expansion operator from
4279 33. It is now permitted to omit both strings after an "if" condition; if the
4280 condition is true, the result is "true". As before, when the second string
4281 is omitted, a false condition yields an empty string. This makes it less
4282 cumbersome to write custom ACL and router conditions.
4284 34. Failure to deliver a bounce message always caused it to be frozen, even if
4285 there was an errors_to setting on the router. The errors_to setting is now
4288 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4289 canonical form (fully expanded) before being placed in
4290 $sender_host_address.
4292 36. The table in the code that translates DNS record types into text (T_A to
4293 "A" for instance) was missing entries for NS and CNAME. It is just possible
4294 that this could have caused confusion if both these types were looked up
4295 for the same domain, because the text type is used as part of Exim's
4296 per-process caching. But the chance of anyone hitting this buglet seems
4299 37. The dnsdb lookup has been extended in a number of ways.
4301 (1) There is a new type, "zns", which walks up the domain tree until it
4302 finds some nameserver records. It should be used with care.
4304 (2) There is a new type, "mxh", which is like "mx" except that it returns
4305 just the host names, not the priorities.
4307 (3) It is now possible to give a list of domains (or IP addresses) to be
4308 looked up. The behaviour when one of the lookups defers can be
4309 controlled by a keyword.
4311 (4) It is now possible to specify the separator character for use when
4312 multiple records are returned.
4314 38. The dnslists ACL condition has been extended: it is now possible to supply
4315 a list of IP addresses and/or domains to be looked up in a particular DNS
4318 39. Added log_selector=+queue_time_overall.
4320 40. When running the queue in the test harness, wait just a tad after forking a
4321 delivery process, to get repeatability of debugging output.
4323 41. Include certificate and key file names in error message when GnuTLS fails
4324 to set them up, because the GnuTLS error message doesn't include the name
4325 of the failing file when there is a problem reading it.
4327 42. Allow both -bf and -bF in the same test run.
4329 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4331 44. The "Exiscan patch" is now merged into the mainline Exim source.
4333 45. Sometimes the final signoff response after QUIT could fail to get
4334 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4335 < 0 before doing a fflush(). This bug looks as though it goes back to the
4336 introduction of TLS in release 3.20, but "sometimes" must have been rare
4337 because the tests only now provoked it.
4339 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4340 (this can affect the format of dates).
4342 47. exim_tidydb, when checking for the continued existence of a message for
4343 which it has found a message-specific retry record, was not finding
4344 messages that were in split spool directories. Consequently, it was
4345 deleting retry records that should have stayed in existence.
4347 48. Steve fixed some bugs in eximstats.
4349 49. The SPA authentication driver was not abandoning authentication and moving
4350 on to the next authenticator when an expansion was forced to fail,
4351 contradicting the general specification for all authenticators. Instead it
4352 was generating a temporary error. It now behaves as specified.
4354 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4355 (the order specifies the preference for clients). The order is now AES256,
4356 AES128, 3DES, ARCFOUR128.
4358 51. Small patch to Sieve code - explicitly set From: when generating an
4361 52. Exim crashed if a remote delivery caused a very long error message to be
4362 recorded - for instance if somebody sent an entire SpamAssassin report back
4363 as a large number of 550 error lines. This bug was coincidentally fixed by
4364 increasing the size of one of Exim's internal buffers (big_buffer) that
4365 happened as part of the Exiscan merge. However, to be on the safe side, I
4366 have made the code more robust (and fixed the comments that describe what
4369 53. Now that there can be additional text after "Completed" in log lines (if
4370 the queue_time_overall log selector is set), a one-byte patch to exigrep
4371 was needed to allow it to recognize "Completed" as not the last thing in
4374 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4375 patch that reportedly fixes this has been added. I am not expert enough to
4376 create a test for it. This is what the patch creator wrote:
4378 "I found a little strange behaviour of ldap code when working with
4379 Windows 2003 AD Domain, where users was placed in more than one
4380 Organization Units. When I tried to give exim partial DN, the exit code
4381 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4382 But simultaneously result of request was absolutely normal ldap result,
4383 so I produce this patch..."
4385 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4386 REFERENCE, so I have modified the code to exclude the patch when that macro
4389 55. Some experimental protocols are using DNS PTR records for new purposes. The
4390 keys for these records are domain names, not reversed IP addresses. The
4391 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4392 leaves it alone. Component reversal etc. now happens only for IP addresses.
4395 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4397 57. Double the size of the debug message buffer (to 2048) so that more of very
4398 long debug lines gets shown.
4400 58. The exicyclog utility now does better if the number of log files to keep
4401 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4403 59. Two changes related to the smtp_active_hostname option:
4405 (1) $smtp_active_hostname is now available as a variable.
4406 (2) The default for smtp_banner uses $smtp_active_hostname instead
4407 of $primary_hostname.
4409 60. The host_aton() function is supposed to be passed a string that is known
4410 to be a valid IP address. However, in the case of IPv6 addresses, it was
4411 not checking this. This is a hostage to fortune. Exim now panics and dies
4412 if the condition is not met. A case was found where this could be provoked
4413 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4414 components; fortuitously, this particular loophole had already been fixed
4415 by change 4.50/55 above.
4417 If there are any other similar loopholes, the new check in host_aton()
4418 itself should stop them being exploited. The report I received stated that
4419 data on the command line could provoke the exploit when Exim was running as
4420 exim, but did not say which command line option was involved. All I could
4421 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4422 running as the user.
4425 61. There was a buffer overflow vulnerability in the SPA authentication code
4426 (which came originally from the Samba project). I have added a test to the
4427 spa_base64_to_bits() function which I hope fixes it.
4430 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4431 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4433 63. The daemon start-up calls getloadavg() while still root for those OS that
4434 need the first call to be done as root, but it missed one case: when
4435 deliver_queue_load_max is set with deliver_drop_privilege. This is
4436 necessary for the benefit of the queue runner, because there is no re-exec
4437 when deliver_drop_privilege is set.
4439 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4440 This has been fixed.
4442 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4443 was in use, was not putting the data itself into the right store pool;
4444 consequently, it could be overwritten for a subsequent message in the same
4445 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4448 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4450 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4451 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4452 the function were treating the return as a boolean value, which happened to
4453 work because 0=false and not-0=true, but is not correct code.
4455 68. The host_aton() function was not handling scoped IPv6 addresses (those
4456 with, for example, "%eth0" on the end) correctly.
4458 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4459 negated items (that is, ~something) in unsigned ints. Some compilers
4460 apparently mutter when there is no cast.
4462 70. If an address verification called from an ACL failed, and did not produce a
4463 user-specific message (i.e. there was only a "system" message), nothing was
4464 put in $acl_verify_message. In this situation, it now puts the system
4467 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4468 session; change 4.31/43 added the unwanted input to the log line - except
4469 that it did not do this in the start of session case. It now does.
4471 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4472 This is wrong and can cause the other end to generate a synchronization
4473 error if it is another Exim or anything else that does the synchronization
4474 check. A QUIT command is no longer sent after a timeout.
4476 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4477 during host lookups.
4479 74. The defer_ok option of callout verification was not working if it was used
4480 when verifying addresses in header lines, that is, for this case:
4482 verify = header_sender/callout=defer_ok
4484 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4485 those file descriptors could be used for SMTP connections. If anything
4486 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4487 could be sent to the SMTP client, causing chaos. The daemon now opens
4488 stdin, stdout, and stderr to /dev/null when it puts itself into the
4491 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4492 log by default. The user can override this with suitable Perl magic.
4494 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4495 the log message when discard triggers, was not working for the DATA ACL or
4496 for the non-SMTP ACL.
4498 78. Error message wording change in sieve.c.
4500 79. If smtp_accept_max_per_host was set, the number of connections could be
4501 restricted to fewer than expected, because the daemon was trying to set up
4502 a new connection before checking whether the processes handling previous
4503 connections had finished. The check for completed processes is now done
4504 earlier. On busy systems, this bug wouldn't be noticed because something
4505 else would have woken the daemon, and it would have reaped the completed
4508 80. If a message was submitted locally by a user whose login name contained one
4509 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4510 It caused a spool format error. I have fixed the spool reading code. A
4511 related problem was that the "from" clause in the Received: line became
4512 illegal because of the space(s). It is now covered by ${quote_local_part.
4514 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4517 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4519 83. Patch from Sieve maintainer to fix unterminated string problem in
4520 "vacation" handling.
4522 84. Some minor changes to the Linux configuration files to help with other
4523 OS variants using glibc.
4525 85. One more patch for Sieve to update vacation handling to latest spec.
4528 ----------------------------------------------------
4529 See the note above about the 4.44 and 4.50 releases.
4530 ----------------------------------------------------
4536 1. Change 4.43/35 introduced a bug that caused file counts to be
4537 incorrectly computed when quota_filecount was set in an appendfile
4540 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4541 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4544 3. Give more explanation in the error message when the command for a transport
4545 filter fails to execute.
4547 4. There are several places where Exim runs a non-Exim command in a
4548 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4549 was being done only for the command run by the queryprogram router. It is
4550 now done for all such subprocesses. The other cases are: ${run, transport
4551 filters, and the commands run by the lmtp and pipe transports.
4553 5. Some older OS have a limit of 256 on the maximum number of file
4554 descriptors. Exim was using setrlimit() to set 1000 as a large value
4555 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4556 systems. I've change it so that if it can't get 1000, it tries for 256.
4558 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4559 was an oversight, and furthermore, ever since the addition of extra
4560 controls (e.g. 4.43/32), the checks on when to allow different forms of
4561 "control" were broken. There should now be diagnostics for all cases when a
4562 control that does not make sense is encountered.
4564 7. $recipients is now available in the predata ACL (oversight).
4566 8. Tidy the search cache before the fork to do a delivery from a message
4567 received from the command line. Otherwise the child will trigger a lookup
4568 failure and thereby defer the delivery if it tries to use (for example) a
4569 cached ldap connection that the parent has called unbind on.
4571 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4572 of $address_data from the recipient verification was clobbered by the
4573 sender verification.
4575 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4576 was its contents. (It was OK if the option was not defined at all.)
4578 11. A "Completed" log line is now written for messages that are removed from
4579 the spool by the -Mrm option.
4581 12. $host_address is now set to the target address during the checking of
4582 ignore_target_hosts.
4584 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4585 being passed; this would have caused $sender_host_name to have been used if
4586 matching the list had actually called for a host name (not very likely,
4587 since this list is usually IP addresses). A host name is now passed as
4590 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4591 code that specifies a non-restarting handler (typically sigaction() in
4592 modern systems) in an attempt to fix a rare and obscure crash bug.
4594 15. Narrowed the window for a race in the daemon that could cause it to ignore
4595 SIGCHLD signals. This is not a major problem, because they are used only to
4596 wake it up if nothing else does.
4598 16. A malformed maildirsize file could cause Exim to calculate negative values
4599 for the mailbox size or file count. Odd effects could occur as a result.
4600 The maildirsize information is now recalculated if the size or filecount
4603 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4604 support for a long time. Removed HAVE_SYS_VFS_H.
4606 18. Updated exipick to current release from John Jetmore.
4608 19. Allow an empty sender to be matched against a lookup in an address list.
4609 Previously the only cases considered were a regular expression, or an
4612 20. Exim went into a mad DNS lookup loop when doing a callout where the
4613 host was specified on the transport, if the DNS lookup yielded more than
4616 21. The RFC2047 encoding function was originally intended for short strings
4617 such as real names; it was not keeping to the 75-character limit for
4618 encoded words that the RFC imposes. It now respects the limit, and
4619 generates multiple encoded words if necessary. To be on the safe side, I
4620 have increased the buffer size for the ${rfc2047: expansion operator from
4623 22. Failure to deliver a bounce message always caused it to be frozen, even if
4624 there was an errors_to setting on the router. The errors_to setting is now
4627 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4628 canonical form (fully expanded) before being placed in
4629 $sender_host_address.
4631 24. Updated eximstats to version 1.33
4633 25. Include certificate and key file names in error message when GnuTLS fails
4634 to set them up, because the GnuTLS error message doesn't include the name
4635 of the failing file when there is a problem reading it.
4637 26. Expand error message when OpenSSL has problems setting up cert/key files.
4640 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4641 (this can affect the format of dates).
4643 28. exim_tidydb, when checking for the continued existence of a message for
4644 which it has found a message-specific retry record, was not finding
4645 messages that were in split spool directories. Consequently, it was
4646 deleting retry records that should have stayed in existence.
4648 29. eximstats updated to version 1.35
4649 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4650 1.35 - bugfix such that pie charts by volume are generated correctly
4652 30. The SPA authentication driver was not abandoning authentication and moving
4653 on to the next authenticator when an expansion was forced to fail,
4654 contradicting the general specification for all authenticators. Instead it
4655 was generating a temporary error. It now behaves as specified.
4657 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4658 (the order specifies the preference for clients). The order is now AES256,
4659 AES128, 3DES, ARCFOUR128.
4661 31. Small patch to Sieve code - explicitly set From: when generating an
4664 32. Exim crashed if a remote delivery caused a very long error message to be
4665 recorded - for instance if somebody sent an entire SpamAssassin report back
4666 as a large number of 550 error lines. This bug was coincidentally fixed by
4667 increasing the size of one of Exim's internal buffers (big_buffer) that
4668 happened as part of the Exiscan merge. However, to be on the safe side, I
4669 have made the code more robust (and fixed the comments that describe what
4672 33. Some experimental protocols are using DNS PTR records for new purposes. The
4673 keys for these records are domain names, not reversed IP addresses. The
4674 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4675 leaves it alone. Component reversal etc. now happens only for IP addresses.
4678 34. The host_aton() function is supposed to be passed a string that is known
4679 to be a valid IP address. However, in the case of IPv6 addresses, it was
4680 not checking this. This is a hostage to fortune. Exim now panics and dies
4681 if the condition is not met. A case was found where this could be provoked
4682 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4683 components; fortuitously, this particular loophole had already been fixed
4684 by change 4.50/55 or 4.44/33 above.
4686 If there are any other similar loopholes, the new check in host_aton()
4687 itself should stop them being exploited. The report I received stated that
4688 data on the command line could provoke the exploit when Exim was running as
4689 exim, but did not say which command line option was involved. All I could
4690 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4691 running as the user.
4694 35. There was a buffer overflow vulnerability in the SPA authentication code
4695 (which came originally from the Samba project). I have added a test to the
4696 spa_base64_to_bits() function which I hope fixes it.
4699 36. The daemon start-up calls getloadavg() while still root for those OS that
4700 need the first call to be done as root, but it missed one case: when
4701 deliver_queue_load_max is set with deliver_drop_privilege. This is
4702 necessary for the benefit of the queue runner, because there is no re-exec
4703 when deliver_drop_privilege is set.
4705 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4706 was in use, was not putting the data itself into the right store pool;
4707 consequently, it could be overwritten for a subsequent message in the same
4708 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4711 38. Sometimes the final signoff response after QUIT could fail to get
4712 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4713 < 0 before doing a fflush(). This bug looks as though it goes back to the
4714 introduction of TLS in release 3.20, but "sometimes" must have been rare
4715 because the tests only now provoked it.
4721 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4722 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4723 Now it returns an integer. A number of calls were still expecting a T/F
4724 return. Fortuitously, in all cases, the tests worked in OK situations,
4725 which is the norm. However, things would have gone wrong on any write
4726 failures on the smtp file descriptor. This function is used when sending
4727 messages over SMTP and also when doing verify callouts.
4729 2. When Exim is called to do synchronous delivery of a locally submitted
4730 message (the -odf or -odi options), it no longer closes stderr before doing
4733 3. Implemented the mua_wrapper option.
4735 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4737 5. Implemented the functions header_remove(), header_testname(),
4738 header_add_at_position(), and receive_remove_recipient(), and exported them
4741 6. If an ACL "warn" statement specified the addition of headers, Exim already
4742 inserted X-ACL-Warn: at the start if there was no header name. However, it
4743 was not making this test for the second and subsequent header lines if
4744 there were newlines in the string. This meant that an invalid header could
4745 be inserted if Exim was badly configured.
4747 7. Allow an ACL "warn" statement to add header lines at the start or after all
4748 the Received: headers, as well as at the end.
4750 8. Added the rcpt_4xx retry error code.
4752 9. Added postmaster_mailfrom=xxx to callout verification option.
4754 10. Added mailfrom=xxxx to the callout verification option, for verify=
4757 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4758 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4760 12. Inserted some casts to stop certain compilers warning when using pointer
4761 differences as field lengths or precisions in printf-type calls (mostly
4762 affecting debugging statements).
4764 13. Added optional readline() support for -be (dynamically loaded).
4766 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4767 same clock tick as a message's arrival, so that its received time was the
4768 same as the "first fail" time on the retry record, and that message
4769 remained on the queue past the ultimate address timeout, every queue runner
4770 would try a delivery (because it was past the ultimate address timeout) but
4771 after another failure, the ultimate address timeout, which should have then
4772 bounced the address, did not kick in. This was a "< instead of <=" error;
4773 in most cases the first failure would have been in the next clock tick
4774 after the received time, and all would be well.
4776 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4777 being recognized when the domain list was tested by the match_domain
4778 condition in an expansion string.
4780 16. Added the ${str2b64: operator.
4782 17. Exim was always calling setrlimit() to set a large limit for the number of
4783 processes, without checking whether the existing limit was already
4784 adequate. (It did check for the limit on file descriptors.) Furthermore,
4785 errors from getrlimit() and setrlimit() were being ignored. Now they are
4786 logged to the main and panic logs, but Exim does carry on, to try to do its
4787 job under whatever limits there are.
4789 18. Imported PCRE 5.0.
4791 19. Trivial typo in log message " temporarily refused connection" (the leading
4794 20. If the log selector return_path_on_delivery was set and an address was
4795 redirected to /dev/null, the delivery process crashed because it assumed
4796 that a return path would always be set for a "successful" delivery. In this
4797 case, the whole delivery is bypassed as an optimization, and therefore no
4800 21. Internal re-arrangement: the function for sending a challenge and reading
4801 a response while authentication was assuming a zero-terminated challenge
4802 string. It's now changed to take a pointer and a length, to allow for
4803 binary data in such strings.
4805 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4807 23. Exim was not respecting finduser_retries when seeking the login of the
4808 uid under which it was called; it was always trying 10 times. (The default
4809 setting of finduser_retries is zero.) Also, it was sleeping after the final
4810 failure, which is pointless.
4812 24. Implemented tls_on_connect_ports.
4814 25. Implemented acl_smtp_predata.
4816 26. If the domain in control=submission is set empty, Exim assumes that the
4817 authenticated id is a complete email address when it generates From: or
4818 Sender: header lines.
4820 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4821 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4822 chown and chgrp in /bin and hostname in /usr/bin.
4824 28. Exim was keeping the "process log" file open after each use, just as it
4825 does for the main log. This opens the possibility of it remaining open for
4826 long periods when the USR1 signal hits a daemon. Occasional processlog
4827 errors were reported, that could have been caused by this. Anyway, it seems
4828 much more sensible not to leave this file open at all, so that is what now
4831 29. The long-running daemon process does not normally write to the log once it
4832 has entered its main loop, and it closes the log before doing so. This is
4833 so that log files can straightforwardly be renamed and moved. However,
4834 there are a couple of unusual error situations where the daemon does write
4835 log entries, and I had neglected to close the log afterwards.
4837 30. The text of an SMTP error response that was received during a remote
4838 delivery was being truncated at 512 bytes. This is too short for some of
4839 the long messages that one sometimes sees. I've increased the limit to
4842 31. It is now possible to make retry rules that apply only when a message has a
4843 specific sender, in particular, an empty sender.
4845 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4846 it possible to be selective about when SMTP synchronization is enforced.
4848 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4850 32. Implemented hosts_connection_nolog.
4852 33. Added an ACL for QUIT.
4854 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4857 35. Added mailbox_size and mailbox_filecount to appendfile.
4859 36. Added control = no_multiline_responses to ACLs.
4861 37. There was a bug in the logic of the code that waits for the clock to tick
4862 in the case where the clock went backwards by a substantial amount such
4863 that the microsecond fraction of "now" was more than the microsecond
4864 fraction of "then" (but the whole seconds number was less).
4866 38. Added support for the libradius Radius client library this is found on
4867 FreeBSD (previously only the radiusclient library was supported).
4873 1. When certain lookups returned multiple values in the form name=value, the
4874 quoting of the values was not always being done properly. Specifically:
4875 (a) If the value started with a double quote, but contained no whitespace,
4877 (b) If the value contained whitespace other than a space character (i.e.
4878 tabs or newlines or carriage returns) it was not quoted.
4879 This fix has been applied to the mysql and pgsql lookups by writing a
4880 separate quoting function and calling it from the lookup code. The fix
4881 should probably also be applied to nisplus, ibase and oracle lookups, but
4882 since I cannot test any of those, I have not disturbed their existing code.
4884 2. A hit in the callout cache for a specific address caused a log line with no
4885 reason for rejecting RCPT. Now it says "Previous (cached) callout
4886 verification failure".
4888 3. There was an off-by-one bug in the queryprogram router. An over-long
4889 return line was truncated at 256 instead of 255 characters, thereby
4890 overflowing its buffer with the terminating zero. As well as fixing this, I
4891 have increased the buffer size to 1024 (and made a note to document this).
4893 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4894 when Exim is waiting for an SMTP response from a remote server, Exim
4895 restarts its select() call on the socket, thereby resetting its timeout.
4896 This is not a problem when such interrupts are rare. Somebody set up a cron
4897 job to run exiwhat every 2 minutes, which is less than the normal select()
4898 timeout (5 or 10 minutes). This meant that the select() timeout never
4899 kicked in because it was always reset. I have fixed this by comparing the
4900 time when an interrupt arrives with the time at the start of the first call
4901 to select(). If more time than the timeout has elapsed, the interrupt is
4902 treated as a timeout.
4904 5. Some internal re-factoring in preparation for the addition of Sieve
4905 extensions (by MH). In particular, the "personal" test is moved to a
4906 separate function, and given an option for scanning Cc: and Bcc: (which is
4907 not set for Exim filters).
4909 6. When Exim created an email address using the login of the caller as the
4910 local part (e.g. when creating a From: or Sender: header line), it was not
4911 quoting the local part when it contained special characters such as @.
4913 7. Installed new OpenBSD configuration files.
4915 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4916 try to make them clearer.
4918 9. Callout options, other than the timeout value, were being ignored when
4919 verifying sender addresses in header lines. For example, when using
4921 verify = header_sender/callout=no_cache
4923 the cache was (incorrectly) being used.
4925 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4926 only the Cygwin environment.
4928 11. When return_path_on_delivery was set as a log selector, if different remote
4929 addresses in the same message used different return paths and parallel
4930 remote delivery occurred, the wrong values would sometimes be logged.
4931 (Whenever a remote delivery process finished, the return path value from
4932 the most recently started remote delivery process was logged.)
4934 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4935 lines when AUTH and/or TLS are in use. This is the "received protocol"
4936 field. Exim used to use "asmtp" for authenticated SMTP, without any
4937 indication (in the protocol name) for TLS use. Now it follows the RFC and
4938 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4939 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4940 names appear in log lines as well as in Received: header lines.
4942 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4943 extensions, and comparison tests, and to fix some bugs.
4945 14. Changes to the "personal" filter test:
4947 (1) The test was buggy in that it was just doing the equivalent of
4948 "contains" tests on header lines. For example, if a user's address was
4949 anne@some.where, the "personal" test would incorrectly be true for
4951 To: susanne@some.where
4953 This test is now done by extracting each address from the header in turn,
4954 and checking the entire address. Other tests that are part of "personal"
4955 are now done using regular expressions (for example, to check local parts
4956 of addresses in From: header lines).
4958 (2) The list of non-personal local parts in From: addresses has been
4959 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4960 taken from the Sieve specification recommendations.
4962 (3) If the message contains any header line starting with "List-" it is
4963 treated as non-personal.
4965 (4) The test for "circular" in the Subject: header line has been removed
4966 because it now seems ill-conceived.
4968 15. Minor typos in src/EDITME comments corrected.
4970 16. Installed latest exipick from John Jetmore.
4972 17. If headers_add on a router specified a text string that was too long for
4973 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4974 of string_sprintf() is now avoided.
4976 18. $message_body_size was not set (it was always zero) when running the DATA
4977 ACL and the local_scan() function.
4979 19. For the "mail" command in an Exim filter, no default was being set for
4980 the once_repeat time, causing a random time value to be used if "once" was
4981 specified. (If the value happened to be <= 0, no repeat happened.) The
4982 default is now 0s, meaning "never repeat". The "vacation" command was OK
4983 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4984 (I found it when inspecting the code).
4986 20. There is now an overall timeout for performing a callout verification. It
4987 defaults to 4 times the callout timeout, which applies to individual SMTP
4988 commands during the callout. The overall timeout applies when there is more
4989 than one host that can be tried. The timeout is checked before trying the
4990 next host. This prevents very long delays if there are a large number of
4991 hosts and all are timing out (e.g. when the network connections are timing
4992 out). The value of the overall timeout can be changed by specifying an
4993 additional sub-option for "callout", called "maxwait". For example:
4995 verify = sender/callout=5s,maxwait=20s
4997 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4998 to the end before writing, but this should make it even safer).
5000 22. Exim was forgetting that it had advertised PIPELINING for the second and
5001 subsequent messages on an SMTP connection. It was also not resetting its
5002 memory on STARTTLS and an internal HELO.
5004 23. When Exim logs an SMTP synchronization error within a session, it now
5005 records whether PIPELINING has been advertised or not.
5007 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5008 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5009 rather than long int.
5011 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5013 26. Added the never_mail option to autoreply.
5019 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5020 crash if the getsockname() call failed; this can happen if a connection is
5021 closed very soon after it is established. The problem was simply in the
5022 order in which certain operations were done, causing Exim to try to write
5023 to the SMTP stream before it had set up the file descriptor. The bug has
5024 been fixed by making things happen in the correct order.
5030 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5031 before the connection was closed, thus losing the rejection response.
5033 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5034 some early Solaris releases, but causes trouble in current releases where
5035 socklen_t is defined.
5037 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5040 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5043 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5044 that releasing the top of it at the end releases what was used for sub-
5045 expansions (unless the block got too big). However, discard this block if
5046 the first thing is a variable or header, so that we can use its block when
5047 it is dynamic (useful for very large $message_headers, for example).
5049 6. Lookups now cache *every* query, not just the most recent. A new, separate
5050 store pool is used for this. It can be recovered when all lookup caches are
5051 flushed. Lookups now release memory at the end of their result strings.
5052 This has involved some general refactoring of the lookup sources.
5054 7. Some code has been added to the store_xxx() functions to reduce the amount
5055 of flapping under certain conditions.
5057 8. log_incoming_interface used to affect only the <= reception log lines. Now
5058 it causes the local interface and port to be added to several more SMTP log
5059 lines, for example "SMTP connection from", and rejection lines.
5061 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5063 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5065 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5066 could be overwritten at the end of the current message (or the start of a
5067 new message if it was set in a HELO ACL). The value is now preserved for
5068 the duration of the SMTP connection.
5070 12. If a transport had a headers_rewrite setting, and a matching header line
5071 contained an unqualified address, that address was qualified, even if it
5072 did not match any rewriting rules. The underlying bug was that the values
5073 of the flags that permit the existence of unqualified sender and recipient
5074 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5075 non-local messages, and by -bnq for local messages) were not being
5076 preserved with the message after it was received.
5078 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5079 "next input=" as part of the text comprising the host identity instead of
5080 the correct text. The code was using the same buffer for two different
5081 strings. However, depending on which order the printing function evaluated
5082 its arguments, the bug did not always show up. Under Linux, for example, my
5083 test suite worked just fine.
5085 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5086 doesn't work with some older versions of Perl. It has been changed to "my",
5087 which in any case is probably the better facility to use.
5089 15. A really picky compiler found some instances of statements for creating
5090 error messages that either had too many or two few arguments for the format
5093 16. The size of the buffer for calls to the DNS resolver has been increased
5094 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5095 for addresses that have a lot of PTR records. This alleviates a problem; it
5096 does not fully solve it.
5098 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5099 buffer now truncates the list and logs the incident, which is the same
5100 action as happens when Exim is looking up a host name and its aliases.
5101 Previously in this situation something unpredictable would happen;
5102 sometimes it was "internal error: store_reset failed".
5104 18. If a server dropped the connection unexpectedly when an Exim client was
5105 using GnuTLS and trying to read a response, the client delivery process
5106 crashed while trying to generate an error log message.
5108 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5109 string, for example:
5111 warn message = H1: something\nH2: something
5113 the text was added as a single header line from Exim's point of view
5114 though it ended up OK in the delivered message. However, searching for the
5115 second and subsequent header lines using $h_h2: did not work. This has been
5116 fixed. Similarly, if a system filter added multiple headers in this way,
5117 the routers could not see them.
5119 20. Expanded the error message when iplsearch is called with an invalid key to
5120 suggest using net-iplsearch in a host list.
5122 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5123 ACLs are no longer actually imposed (and a message to that effect is
5126 22. If a "gecos" field in a passwd entry contained escaped characters, in
5127 particular, if it contained a \" sequence, Exim got it wrong when building
5128 a From: or a Sender: header from that name. A second bug also caused
5129 incorrect handling when an unquoted " was present following a character
5130 that needed quoting.
5132 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5133 was not being matched caselessly.
5135 24. Arranged for all hyphens in the exim.8 source to be escaped with
5138 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5139 properly. Recipient callout cache records were still being keyed to include
5140 the sender, even when use_sender was set false. This led to far more
5141 callouts that were necessary. The sender is no longer included in the key
5142 when use_sender is false.
5144 26. Added "control = submission" modifier to ACLs.
5146 27. Added the ${base62d: operator to decode base 62 numbers.
5148 28. dnsdb lookups can now access SRV records.
5150 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5151 the configuration file.
5153 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5154 (-v) mode. This makes the output for a verbose queue run more intelligible.
5156 31. Added a use_postmaster feature to recipient callouts.
5158 32. Added the $body_zerocount variable, containing the number of binary zero
5159 bytes in the message body.
5161 33. The time of last modification of the "new" subdirectory is now used as the
5162 "mailbox time last read" when there is a quota error for a maildir
5165 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5167 35. Added +ignore_unknown as a special item in host lists.
5169 36. Code for decoding IPv6 addresses in host lists is now included, even if
5170 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5171 address was recognized as an IP address, but was then not correctly decoded
5172 into binary, causing unexpected and incorrect effects when compared with
5179 1. Very minor rewording of debugging text in manualroute to say "list of
5180 hosts" instead of "hostlist".
5182 2. If verify=header_syntax was set, and a header line with an unqualified
5183 address (no domain) and a large number of spaces between the end of the
5184 name and the colon was received, the reception process suffered a buffer
5185 overflow, and (when I tested it) crashed. This was caused by some obsolete
5186 code that should have been removed. The fix is to remove it!
5188 3. When running in the test harness, delay a bit after writing a bounce
5189 message to get a bit more predictability in the log output.
5191 4. Added a call to search_tidyup() just before forking a reception process. In
5192 theory, someone could use a lookup in the expansion of smtp_accept_max_
5193 per_host which, without the tidyup, could leave open a database connection.
5195 5. Added the variables $recipient_data and $sender_data which get set from a
5196 lookup success in an ACL "recipients" or "senders" condition, or a router
5197 "senders" option, similar to $domain_data and $local_part_data.
5199 6. Moved the writing of debug_print from before to after the "senders" test
5202 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5203 problems for message scanning, either using a data ACL, or using
5204 local_scan() because the Received: header was not generated till after they
5205 were called (in order to set the time as the time of reception completion).
5206 I have revised the way this works. The header is now generated after the
5207 body is received, but before the ACL or local_scan() are called. After they
5208 are run, the timestamp in the header is updated.
5214 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5215 before starting a queue runner without re-exec. This happened only when
5216 deliver_drop_privilege was set or when the Exim user was set to root. The
5217 effect of the bug was that timeouts during subsequent deliveries caused
5218 crashes instead of being properly handled. The handler is now left at its
5219 default (and expected) setting.
5221 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5222 message, again when deliver_drop_privilege is set or Exim is run as root.
5223 The bug described in (1) was not present in this case, but the tidying up
5224 of the other signals was missing. I have made the two cases consistent.
5226 3. The ignore_target_hosts setting on a manualroute router was being ignored
5227 for hosts that were looked up using the /MX notation.
5229 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5232 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5233 operated on the sender address. After changing the $sender_address to <>
5234 for the sender address verify, Exim was re-instated it as the original
5235 (before rewriting) address, but remembering that it had rewritten it, so it
5236 wasn't rewriting it again. This bug also had the effect of breaking the
5237 sender address verification caching when the sender address was rewritten.
5239 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5240 This has been changed so that if the ip literal address matches
5241 ignore_target_hosts, the router declines.
5243 7. Added expansion conditions match_domain, match_address, and match_local_
5244 part (NOT match_host).
5246 8. The placeholder for the Received: header didn't have a length field set.
5248 9. Added code to Exim itself and to exim_lock to test for a specific race
5249 condition that could lead to file corruption when using MBX delivery. The
5250 issue is with the lockfile that is created in /tmp. If this file is removed
5251 after a process has opened it but before that process has acquired a lock,
5252 there is the potential for a second process to recreate the file and also
5253 acquire a lock. This could lead to two Exim processes writing to the file
5254 at the same time. The added code performs the same test as UW imapd; it
5255 checks after acquiring the lock that its file descriptor still refers to
5256 the same named file.
5258 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5259 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5262 11. Added the smtp_active_hostname option. If used, this will typically be made
5263 to depend on the incoming interface address. Because $interface_address is
5264 not set up until the daemon has forked a reception process, error responses
5265 that can happen earlier (such as "too many connections") no longer contain
5268 12. If an expansion in a condition on a "warn" statement fails because a lookup
5269 defers, the "warn" statement is abandoned, and the next ACL statement is
5270 processed. Previously this caused the whole ACL to be aborted.
5272 13. Added the iplsearch lookup type.
5274 14. Added ident_timeout as a log selector.
5276 15. Added tls_certificate_verified as a log selector.
5278 16. Added a global option tls_require_ciphers (compare the smtp transport
5279 option of the same name). This controls incoming TLS connections.
5281 17. I finally figured out how to make tls_require_ciphers do a similar thing
5282 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5283 before starting the TLS session.
5285 18. Tabs are now shown as \t in -bP output.
5287 19. If the log selector return_path_on_delivery was set, Exim crashed when
5288 bouncing a message because it had too many Received: header lines.
5290 20. If two routers both had headers_remove settings, and the first one included
5291 a superfluous trailing colon, the final name in the first list and the
5292 first name in the second list were incorrectly joined into one item (with a
5293 colon in the middle).
5299 1. Added -C and -D options to the exinext utility, mainly to make it easier
5300 to include in the automated testing, but these could be helpful when
5301 multiple configurations are in use.
5303 2. The exinext utility was not formatting the output nicely when there was
5304 an alternate port involved in the retry record key, nor when there was a
5305 message id as well (for retries that were specific to a specific message
5306 and a specific host). It was also confused by IPv6 addresses, because of
5307 the additional colons they contain. I have fixed the IPv4 problem, and
5308 patched it up to do a reasonable job for IPv6.
5310 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5311 delivery, the log line now contains "pipelined" if PIPELINING was used.
5313 4. An SMTP transport process used to panic and die if the bind() call to set
5314 an explicit outgoing interface failed. This has been changed; it is now
5315 treated in the same way as a connect() failure.
5317 5. A reference to $sender_host_name in the part of a conditional expansion
5318 that was being skipped was still causing a DNS lookup. This no longer
5321 6. The def: expansion condition was not recognizing references to header lines
5322 that used bh_ and bheader_.
5324 7. Added the _cache feature to named lists.
5326 8. The code for checking quota_filecount in the appendfile transport was
5327 allowing one more file than it should have been.
5329 9. For compatibility with Sendmail, the command line option
5337 and sets the incoming protocol and host name (for trusted callers). The
5338 host name and its colon can be omitted when only the protocol is to be set.
5339 Note the Exim already has two private options, -pd and -ps, that refer to
5340 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5341 "s", but I don't think that's a major issue.
5343 10. A number of refactoring changes to the code, none of which should affect
5346 (a) The number of logging options was getting close to filling up the
5347 32-bit word that was used as a bit map. I have split them into two classes:
5348 those that are passed in the argument to log_write(), and those that are
5349 only ever tested independently outside of that function. These are now in
5350 separate 32-bit words, so there is plenty of room for expansion again.
5351 There is no change in the user interface or the logging behaviour.
5353 (b) When building, for example, log lines, the code previously used a
5354 macro that called string_cat() twice, in order to add two strings. This is
5355 not really sufficiently general. Furthermore, there was one instance where
5356 it was actually wrong because one of the argument was used twice, and in
5357 one call a function was used. (As it happened, calling the function twice
5358 did not affect the overall behaviour.) The macro has been replaced by a
5359 function that can join an arbitrary number of extra strings onto a growing
5362 (c) The code for expansion conditions now uses a table and a binary chop
5363 instead of a serial search (which was left over from when there were very
5364 few conditions). Also, it now recognizes conditions like "pam" even when
5365 the relevant support is not compiled in: a suitably worded error message is
5366 given if an attempt is made to use such a condition.
5368 11. Added ${time_interval:xxxxx}.
5370 12. A bug was causing one of the ddress fields not to be passed back correctly
5371 from remote delivery subprocesses. The field in question was not being
5372 subsequently used, so this caused to problems in practice.
5374 13. Added new log selectors queue_time and deliver_time.
5376 14. Might have fixed a bug in maildirsizefile handling that threw up
5377 "unexpected character" debug warnings, and recalculated the data
5378 unnecessarily. In any case, I expanded the warning message to give more
5381 15. Added the message "Restricted characters in address" to the statements in
5382 the default ACL that block characters like @ and % in local parts.
5384 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5385 Three changes have been made:
5387 (a) There was a serious bug; a negative response to MAIL caused the whole
5388 recipient domain to be cached as invalid, thereby blocking all messages
5389 to all local parts at the same domain, from all senders. This bug has
5390 been fixed. The domain is no longer cached after a negative response to
5391 MAIL if the sender used is not empty.
5393 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5396 (c) A new callout option, "use_sender" has been added for people who want
5397 the modified behaviour.
5403 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5406 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5407 indeed breaks things for older releases.
5409 3. Added additional logging to the case where there is a problem reading data
5410 from a filter that is running in a subprocess using a pipe, in order to
5411 try to track down a specific problem.
5413 4. Testing facility fudge: when running in the test harness and attempting
5414 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5415 getting "No route to host". Convert this to a timeout.
5417 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5420 6. Some OS don't have socklen_t but use size_t instead. This affects the
5421 fifth argument of getsockopt() amongst other things. This is now
5422 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5423 can be set for individual OS. I have set it for SunOS5, OSF1, and
5424 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5425 some earlier ones do not.
5427 7. Change 4.30/15 was not doing the test caselessly.
5429 8. The standard form for an IPv6 address literal was being rejected by address
5430 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5431 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5432 this, as well as the form without the "IPv6" on the front (but only when
5433 address literals are enabled, of course).
5435 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5437 10. Exim crashed if a message with an empty sender address specified by -f
5438 encountered a router with an errors_to setting. This could be provoked only
5439 by a command such as
5443 where an empty string was supplied; "<>" did not hit this bug.
5445 11. Installed PCRE release 4.5.
5447 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5448 remained set. It is now erased.
5450 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5451 times from message ids (which are base 36 rather than the normal 62).
5453 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5454 were being counted as actual protocol errors, and logged if the log
5455 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5456 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5457 and DATA following a set of rejected RCPTs do not count as protocol errors.
5458 In other words, Exim assumes they were pipelined, though this may not
5459 actually be the case. Of course, in all cases the client gets an
5460 appropriate error code.
5462 15. If a lookup fails in an ACL condition, a message about the failure may
5463 be available; it is used if testing the ACL cannot continue, because most
5464 such messages specify what the cause of the deferral is. However, some
5465 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5466 that caused an old message to be retained and used if a later statement
5467 caused a defer, replacing the real cause of the deferral.
5469 16. If an IP address had so many PTR records that the DNS lookup buffer
5470 was not large enough to hold them, Exim could crash while trying to process
5471 the truncated data. It now detects and logs this case.
5473 17. Further to 4.21/58, another change has been made: if (and only if) the
5474 first line of a message (the first header line) ends with CRLF, a bare LF
5475 in a subsequent header line has a space inserted after it, so as not to
5476 terminate the header.
5478 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5479 unnecessarily, used atoi() instead of strtol(), and didn't check the
5480 termination when getting file sizes from file names by regex.
5482 19. Completely re-implemented the support for maildirsize files, in the light
5483 of a number of problems with the previous contributed implementation
5484 (4.30/29). In particular:
5486 . If the quota is zero, the maildirsize file is maintained, but no quota is
5489 . If the maildir directory does not exist, it is created before any attempt
5490 to write a maildirsize file.
5492 . The quota value in the file is just a cache; if the quota is changed in
5493 the transport, the new value overrides.
5495 . A regular expression is available for excluding directories from the
5498 20. The autoreply transport checks the characters in options that define the
5499 message's headers; it allows continued headers, but it was checking with
5500 isspace() after an embedded newline instead of explicitly looking for a
5503 21. If all the "regular" hosts to which an address was routed had passed their
5504 expiry times, and had not reached their retry times, the address was
5505 bounced, even if fallback hosts were defined. Now Exim should go on to try
5508 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5509 equivalent code in the SMTP transport. Some hosts send humungous responses
5510 to HELO/EHLO, more than 1024 it seems.
5512 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5513 gives compiler warnings in some environments. I've now done it "properly",
5516 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5517 (because of problems with the built-in one) was declared to return uschar *
5518 instead of char *, causing compiler failure.
5520 25. Fixed a file descriptor leak when processing alias/forward files.
5522 26. Fixed a minor format string issue in dbfn.c.
5524 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5526 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5527 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5530 29. When a sender address is verified, it is cached, to save repeating the test
5531 when there is more than one recipient in a message. However, when the
5532 verification involves a callout, it is possible for different callout
5533 options to be set for different recipients. It is too complicated to keep
5534 track of this in the cache, so now Exim always runs a verification when a
5535 callout is required, relying on the callout cache for the optimization.
5536 The overhead is duplication of the address routing, but this should not be
5539 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5540 to be verified with callout=postmaster, and the main callout worked but the
5541 postmaster check failed, the verification correctly failed. However, if a
5542 subsequent RCPT command asked for sender verification *without* the
5543 postmaster check, incorrect caching caused this verification also to fail,
5546 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5547 it was not caching the DNS options (qualify_single, search_parents) that
5548 were used when the lookup failed. A subsequent lookup with different
5549 options therefore always gave the same answer, though there were cases
5550 where it should not have. (Example: a "domains = !$mx_any" option on a
5551 dnslookup router: the "domains" option is always processed without any
5552 widening, but the router might have qualify_single set.) Now Exim uses the
5553 cached value only when the same options are set.
5555 32. Added John Jetmore's "exipick" utility to the distribution.
5557 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5558 than a timeout (e.g. a certificate is required, and is not provided), an
5559 Exim server now closes the connection immediately. Previously it waited for
5560 the client to close - but if the client is SSL, it seems that they each
5561 wait for each other, leading to a delay before one of them times out.
5563 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5564 maintained 0.8.x compatibility because I don't think many are using it, and
5565 it is clearly obsolete.
5567 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5570 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5571 client certificate was expired. A simple patch fixes this, though I don't
5572 understand the full logic of why the verify callback is called multiple
5575 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5576 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5577 which causes problems with some clients (such as the Certicom SSL Plus
5578 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5579 disables the coutermeasure allowing Eudora to connect."
5581 38. Exim was not checking that a write() to a log file succeeded. This could
5582 lead to Bad Things if a log got too big, in particular if it hit a file
5583 size limit. Exim now panics and dies if it cannot write to a log file, just
5584 as it does if it cannot open a log file.
5586 39. Modified OS/Makefile-Linux so that it now contains
5588 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5590 The two -D definitions ensure that Exim is compiled with large file
5591 support, which makes it possible to handle log files that are bigger than
5594 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5595 instance) a domain was checked against a named list that involved a lookup,
5596 causing $domain_data to be set, then another domain was checked against the
5597 same list, then the first domain was re-checked, the value of $domain_data
5598 after the final check could be wrong. In particular, if the second check
5599 failed, it could be set empty. This bug probably also applied to
5602 41. The strip_trailing_dot option was not being applied to the address given
5603 with the -f command-line option.
5605 42. The code for reading a message's header from the spool was incrementing
5606 $received_count, but never initializing it. This meant that the value was
5607 incorrect (doubled) while delivering a message in the same process in which
5608 it was received. In the most common configuration of Exim, this never
5609 happens - a fresh exec is done - but it can happen when
5610 deliver_drop_privilege is set.
5612 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5613 it now includes up to 150 characters of the unexpected data in the log
5616 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5617 and building data strings. The size of both of these buffers was 10 000
5618 bytes - far larger than anybody would *ever* want, thought I. Needless to
5619 say, somebody hit the limit. I have increased the maximum line length to
5620 20 000 and the maximum data length of concatenated lines to 100 000. I have
5621 also fixed two bugs, because there was no checking on these buffers. Tsk,
5622 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5623 buffer is too small.
5625 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5626 lsearch lookups. Now it does.
5628 46. When parsing a route_list item in a manualroute router, a fixed-length
5629 buffer was used for the list of hosts. I made this 1024 bytes long,
5630 thinking that nobody would ever have a list of hosts that long. Wrong.
5631 Somebody had a whole pile of complicated expansion conditions, and the
5632 string was silently truncated, leading to an expansion error. It turns out
5633 that it is easier to change to an unlimited length (owing to other changes
5634 that have happened since this code was originally written) than to build
5635 structure for giving a limitation error. The length of the item that
5636 expands into the list of hosts is now unlimited.
5638 47. The lsearch lookup could not handle data where the length of text line was
5639 more than 4095 characters. Such lines were truncated, leading to shortened
5640 data being returned. It should now handle lines of any length.
5642 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5643 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5646 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5647 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5648 no longer happens in comment lines. A list of replacements is now placed
5649 at the head of all of the source files, except those whose only change is
5650 to replace PERL_COMMAND in the very first #! line.
5652 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5653 messages on the queue, with a bottom-up merge sort, using code contributed
5654 by Michael Haardt. This should make operations like -bp somewhat faster on
5655 large queues. It won't affect queue runners, except when queue_run_in_order
5658 51. Installed eximstats 1.31 in the distribution.
5660 52. Added support for SRV lookups to the dnslookup router.
5662 53. If an ACL referred to $message_body or $message_body_end, the value was not
5663 reset for any messages that followed in the same SMTP session.
5665 54. The store-handling optimization for building very long strings was not
5666 differentiating between the different store pools. I don't think this
5667 actually made any difference in practice, but I've tidied it.
5669 55. While running the routers to verify a sender address, $sender_address
5670 was still set to the sender address. This is wrong, because when routing to
5671 send a bounce to the sender, it would be empty. Therefore, I have changed
5672 it so that, while verifying a sender address, $sender_address is set to <>.
5673 (There is no change to what happens when verifying a recipient address.)
5675 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5676 target A or AAAA records (if not already returned) without resetting the
5677 qualify_single or search_parents options of the DNS resolver. These are
5678 inappropriate in this case because the targets of MX and SRV records must
5679 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5680 target that, when qualified, matched something in the local domain. These
5681 two options are now turned off when doing these lookups.
5683 57. It seems that at least some releases of Reiserfs (which does not have the
5684 concept of a fixed number of inodes) returns zero and not -1 for the
5685 number of available inodes. This interacted badly with check_spool_inodes,
5686 which assumed that -1 was the "no such thing" setting. What I have done is
5687 to check that the total number of inodes is greater than zero before doing
5688 the test of how many are available.
5690 58. When a "warn" ACL statement has a log_message modifier, the message is
5691 remembered, and not repeated. This is to avoid a lot of repetition when a
5692 message has many recipients that cause the same warning to be written.
5693 However, Exim was preserving the list of already written lines for an
5694 entire SMTP session, which doesn't seem right. The memory is now reset if a
5695 new message is started.
5697 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5698 debugging output unless log_rewrite was also set.
5700 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5701 of (int)(handle) when we know that handle contains (void *)(-1).
5703 61. The Exim daemon panic-logs an error return when it closes the incoming
5704 connection. However "connection reset by peer" seems to be common, and
5705 isn't really an error worthy of noting specially, so that particular error
5708 62. When Exim is trying to find all the local interfaces, it used to panic and
5709 die if the ioctl to get the interface flags failed. However, it seems that
5710 on at least one OS (Solaris 9) it is possible to have an interface that is
5711 included in the list of interfaces, but for which you get a failure error
5712 for this call. This happens when the interface is not "plumbed" into a
5713 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5714 failure of the "get flags" call assumes that the interface is down.
5716 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5717 makes life easier for people who are doing arithmetic on fields extracted
5718 from dates, where you often get leading zeros that should not be
5719 interpreted as octal.
5721 64. Added qualify_domain to the redirect router, to override the global
5724 65. If a pathologically long header line contained very many addresses (the
5725 report of this problem mentioned 10 000) and each of them was rewritten,
5726 Exim could use up a very large amount of memory. (It kept on making new
5727 copies of the header line as it rewrote, and never released the old ones.)
5728 At the expense of a bit more processing, the header rewriting function has
5729 been changed so that it no longer eats memory in this way.
5731 66. The generation of the Received: header has been moved from the time that a
5732 message starts to be received, to the time that it finishes. The timestamp
5733 in the Received: header should now be very close to that of the <= log
5734 line. There are two side-effects of this change:
5736 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5737 logged header lines no longer include the local Received: line, because
5738 it has not yet been created. The same applies to a copy of the message
5739 that is returned to a non-SMTP sender when a message is rejected.
5741 (b) When a filter file is tested using -bf, no additional Received: header
5742 is added to the test message. After some thought, I decided that this
5745 This change does not affect the value of $received_for. It is still set
5746 after address rewriting, but before local_scan() is called.
5748 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5750 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5751 gave an unhelpful panic error message, and a defer error. I have managed to
5752 change this behaviour so that it now rejects any supplied certificate,
5753 which seems right, as the list of acceptable certificates is empty.
5755 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5756 gave an unhelpful defer error. I have not managed to make this reject any
5757 supplied certificates, but the error message it gives is "no certificate
5758 supplied", which is not helpful.
5760 70. exigrep's output now also includes lines that are not associated with any
5761 message, but which match the given pattern. Implemented by a patch from
5762 Martin Sluka, which also tidied up the Perl a bit.
5764 71. Recipient callout verification, like sender verification, was using <> in
5765 the MAIL FROM command. This isn't really the right thing, since the actual
5766 sender may affect whether the remote host accepts the recipient or not. I
5767 have changed it to use the actual sender in the callout; this means that
5768 the cache record is now keyed on a recipient/sender pair, not just the
5769 recipient address. There doesn't seem to be a real danger of callout loops,
5770 since a callout by the remote host to check the sender would use <>.
5771 [SEE ABOVE: changed after hitting problems.]
5773 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5774 temporary errors. However, in the case of such a code being given after
5775 the end of a data transmission (i.e. after ".") Exim was failing to write
5776 a retry record for the message. (Yes, there was some broken host that was
5777 actually sending 8xx at this point.)
5779 73. An unknown lookup type in a host list could cause Exim to panic-die when
5780 the list was checked. (An example that provoked this was putting <; in the
5781 middle of a list instead of at the start.) If this happened during a DATA
5782 ACL check, a -D file could be left lying around. This kind of configuration
5783 error no longer causes Exim to die; instead it causes a defer error. The
5784 incident is still logged to the main and panic logs.
5786 74. Buglet left over from Exim 3 conversion. The message "too many messages
5787 in one connection" was written to the rejectlog but not the mainlog, except
5788 when address rewriting (yes!) was being logged.
5790 75. Added write_rejectlog option.
5792 76. When a system filter was run not as root (that is, when system_filter_user
5793 was set), the values of the $n variables were not being returned to the
5794 main process; thus, they were not subsequently available in the $sn
5797 77. Added +return_path_on_delivery log selector.
5799 78. A connection timeout was being treated differently from recipients deferred
5800 when testing hosts_max_try with a message that was older than the host's
5801 retry timeout. (The host should not be counted, thus allowing all hosts to
5802 be tried at least once before bouncing.) This may have been the cause of an
5803 occasionally reported bug whereby a message would remain on the queue
5804 longer than the retry timeout, but would be bounced if a delivery was
5805 forced. I say "may" because I never totally pinned down the problem;
5806 setting up timeout/retry tests is difficult. See also the next item.
5808 79. The ultimate address timeout was not being applied to errors that involved
5809 a combination of host plus message (for example, a timeout on a MAIL
5810 command). When an address resolved to a number of possible hosts, and they
5811 were not all tried for each delivery (e.g. because of hosts_max_try), a
5812 message could remain on the queue longer than the retry timeout.
5814 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5817 81. Fixed an obscure SMTP outgoing bug which required at least the following
5818 conditions: (a) there was another message waiting for the same server;
5819 (b) the server returned 5xx to all RCPT commands in the first message so
5820 that the message was not completed; (c) the server dropped the connection
5821 or gave a negative response to the RSET that Exim sends to abort the
5822 transaction. The observed case was a dropped connection after DATA that had
5823 been sent in pipelining mode. That is, the server had advertised PIPELINING
5824 but was not implementing it correctly. The effect of the bug was incorrect
5825 behaviour, such as trying another host, and this could lead to a crash.
5831 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5832 and daemon.c were passed as pointers to ints; they should have been
5833 pointers to socklen_t variables (which are typically unsigned ints).
5835 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5838 3. Fixed a really odd bug that affected only the testing scheme; patching a
5839 certain fixed string in the binary changed the value of another string that
5840 happened to be identical to the end of the original first string.
5842 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5843 name", it returns that address as the IP address. On some operating
5844 systems (e.g. Solaris), it also passes back the IP address string as the
5845 "host name". However, on others (e.g. Linux), it passes back an empty
5846 string. Exim wasn't checking for this, and was changing the host name to an
5847 empty string, assuming it had been canonicalized.
5849 5. Although rare, it is permitted to have more than one PTR record for a given
5850 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5851 all the names associated with an address, because they do in Solaris.
5852 However, it seems that they do not in Linux for data that comes from the
5853 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5854 I found this out when I moved to a new Linux workstation and tried to run
5855 the Exim test suite.
5857 To get round this problem I have changed the code so that it now does its
5858 own call to the DNS to look up PTR records when searching for a host name.
5859 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5860 addresses that are only in /etc/hosts are still found.
5862 This behaviour is, however, controlled by an option called host_lookup_
5863 order, which defaults to "bydns:byaddr". If people want to use the other
5864 order, or indeed, just use one or the other means of lookup, they can
5865 specify it in this variable.
5867 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5868 some operating systems, this comes back from gethostbyaddr() as an empty
5869 string, and this is what Exim used to test for. However, it seems that in
5870 other systems, "." is yielded. Exim now tests for this case too.
5872 7. The values of check_spool_space and check_log_space are now held internally
5873 as a number of kilobytes instead of an absolute number of bytes. If a
5874 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5875 kilobyte. This means that much larger values can be stored.
5877 8. Exim monitor: an attempt to get the action menu when not actually pointing
5878 at a message produces an empty menu entitled "No message selected". This
5879 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5880 no entries in it ("Shell widget menu has zero width and/or height"). So I
5881 have added a single, blank menu entry in this case.
5883 9. Added ${quote_local_part.
5885 10. MIME decoding is now applied to the contents of Subject: header lines when
5888 11. Now that a reference to $sender_host_address automatically causes a reverse
5889 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5890 host lookup before query-style lookups in lists that might use this
5891 variable. This has therefore been abolished, and the "net-" prefix is no
5892 longer necessary for query-style lookups.
5894 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5895 have been a typo for LFLAGS, so it has been changed.
5897 13. The install script calls Exim with "-C /dev/null" in order to find the
5898 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5899 to be output. However, since Exim outputs its version number before the
5900 error, it didn't break the script. It just looked ugly. I fixed this by
5901 always allowing "-C /dev/null" if the caller is root.
5903 14. Ignore overlarge ACL variable number when reading spool file - insurance
5904 against a later release with more variables having written the file.
5906 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5907 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5908 this, as well as the form without the "IPv6" on the front.
5910 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5911 OS/Makefile-Darwin file.
5913 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5914 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5916 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5917 variable. However, some OS use ints for inodes. I've added cast to long int
5918 to get rid of the compiler warning.
5920 19. I had forgotten to lock out "/../" in configuration file names when
5921 ALT_CONFIG_PREFIX was set.
5923 20. Routers used for verification do not need to specify transports. However,
5924 if such a router generated a host list, and callout was configured, Exim
5925 crashed, because it could not find a port number from the (non-existent)
5926 transport. It now assumes port 25 in this circumstance.
5928 21. Added the -t option to exigrep.
5930 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5931 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5932 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5933 them is set, LOOKUP_LSEARCH is forced.
5935 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5937 24. Added sender and host information to the "rejected by local_scan()" log
5938 line; previously there was no indication of these.
5940 25. Added .include_if_exists.
5942 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5943 Linux. It turns out that not all file systems support this. Apparently some
5944 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5945 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5946 not supported on the file descriptor, is now ignored when Exim is trying to
5947 sync a directory. This applies only to Linux.
5949 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5951 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5952 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5955 29. Added support for maildirsize files from supplied patch (modified a bit).
5957 30. The use of :fail: followed by an empty string could lead Exim to respond to
5958 sender verification failures with (e.g.):
5960 550 Verification failed for <xxx>
5961 550 Sender verify failed
5963 where the first response line was missing the '-' that indicates it is not
5964 the final line of the response.
5966 31. The loop for finding the name of the user that called Exim had a hardwired
5967 limit of 10; it now uses the value of finduser_retries, which is used for
5968 all other user lookups.
5970 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5973 33. Exim was neglecting to zero errno before one call of strtol() when
5974 expanding a string and expecting an integer value. On some systems this
5975 resulted in spurious "integer overflow" errors. Also, it was casting the
5976 result into an int without checking.
5978 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5979 did not work. The code looks as if it has *never* worked, though it appears
5980 to have been documented since at least release 1.62. I have made it work.
5982 35. The "timeout_DNS" error in retry rules, also documented since at least
5983 1.62, also never worked. As it isn't clear exactly what this means, and
5984 clearly it isn't a major issue, I have abolished the feature by treating it
5985 as "timeout", and writing a warning to the main and panic logs.
5987 36. The display of retry rules for -brt wasn't always showing the error code
5990 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5991 timeout_connect_A, timeout_connect_MX.
5993 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5994 to the empty sender.
5996 39. The daemon was not analysing the content of -oX till after it had closed
5997 stderr and disconnected from the controlling terminal. This meant that any
5998 syntax errors were only noted on the panic log, and the return code from
5999 the command was 0. By re-arranging the code a little, I've made the
6000 decoding happen first, so such errors now appear on stderr, and the return
6001 code is 1. However, the actual setting up of the sockets still happens in
6002 the disconnected process, so errors there are still only recorded on the
6005 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6006 connections (as happens on some IP stacks) was logged at start up time as
6007 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6008 it from "IPv6 and IPv4", which means that two separate sockets are being
6011 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6012 says whether AF_INET or AF_INET6 was passed as an argument.
6014 42. Exiwhat output was messed up when time zones were included in log
6017 43. Exiwhat now gives more information about the daemon's listening ports,
6018 and whether -tls-on-connect was used.
6020 44. The "port" option of the smtp transport is now expanded.
6022 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6023 silently ignored. Now an error message is written to the main and panic
6026 46. There's a new ACL modifier called "logwrite" which writes to a log file
6027 as soon as it is encountered.
6029 47. Added $local_user_uid and $local_user_gid at routing time.
6031 48. Exim crashed when trying to verify a sender address that was being
6034 49. Exim was recognizing only a space character after ".include". It now also
6035 recognizes a tab character.
6037 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6038 extracting the relevant information from the specification. The man page no
6039 longer contains scrambled data for the -d option, and I've added a section
6040 at the front about calling Exim under different names.
6042 51. Added "extra_headers" argument to the "mail" command in filter files.
6044 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6047 53. Installed eximstats 1.29.
6049 54. Added transport_filter_timeout as a generic transport option.
6051 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6052 Cc: header lines. This was required by RFC 822, but it not required by RFC
6055 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6056 incoming messages that did not have them. Now it does so only if the
6057 message originates locally, that is, if there is no associated remote host
6058 address. When Resent- header lines are present, this applies to the Resent-
6059 lines rather than the non-Resent- lines.
6061 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6062 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6064 58. Messages for configuration errors now include the name of the main
6065 configuration file - useful now that there may be more than one file in a
6066 list (.included file names were always shown).
6068 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6069 for those rare installations that do not start the daemon as root or run it
6070 setuid root. I've cut out the call to initgroups() if the daemon is not
6073 60. The Exim user and group can now be bound into the binary as text strings
6074 that are looked up at the start of Exim's processing.
6076 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6078 62. Added $mailstore_basename variable.
6080 63. Installed patch to sieve.c from Michael Haardt.
6082 64. When Exim failed to open the panic log after failing to open the main log,
6083 the original message it was trying to log was written to stderr and debug
6084 output, but if they were not available (the usual case in production), it
6085 was lost. Now it is written to syslog before the two lines that record the
6086 failures to open the logs.
6088 65. Users' Exim filters run in subprocesses under the user's uid. It is
6089 possible for a "deliver" command or an alias in a "personal" command to
6090 provoke an address rewrite. If logging of address rewriting is configured,
6091 this fails because the process is not running as root or exim. There may be
6092 a better way of dealing with this, but for the moment (because 4.30 needs
6093 to be released), I have disabled address rewrite logging when running a
6094 filter in a non-root, non-exim process.
6100 1. The buildconfig auxiliary program wasn't quoting the value set for
6101 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6102 not defined. This bug was masked in 4.22 by the effect that was fixed in
6105 2. Some messages that were rejected after a message id was allocated were
6106 shown as "incomplete" by exigrep. It no longer does this for messages that
6107 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6109 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6110 have allow_domain_literals set, the ID did not get logged in the <= line.
6111 Domain literals are now always recognized in Message-ID: header lines.
6113 4. The first argument for a ${extract expansion item is the key name or field
6114 number. Leading and trailing spaces in this item were not being ignored,
6115 causing some misleading effects.
6117 5. When deliver_drop_privilege was set, single queue runner processes started
6118 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6119 same command in the process it spins off) were not dropping privilege.
6121 6. When the daemon running as "exim" started a queue runner, it always
6122 re-executed Exim in the spun-off process. This is a waste of effort when
6123 deliver_drop_privilege is set. The new process now just calls the
6124 queue-runner function directly.
6130 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6133 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6134 ignored. Though the use of -oP was forcing the writing of a pid file, it
6135 was always written to the default place.
6137 3. If the message "no IP address found for host xxxx" is generated during
6138 incoming verification, it is now followed by identification of the incoming
6139 connection (so you can more easily find what provoked it).
6141 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6143 5. Added some features to "harden" Exim a bit more against certain attacks:
6145 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6146 be put in Local/Makefile. This is like the never_users runtime option,
6147 but it cannot be overridden. The default setting is "root".
6149 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6150 prefix string with which any file named in a -C command line option
6153 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6154 is retained for -C and -D only if the caller of Exim is root. Without
6155 it, the exim user may also use -C and -D and retain privilege.
6157 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6158 command line option is disabled.
6160 6. Macro names set by the -D option must start with an upper case letter, just
6161 like macro names defined in the configuration file.
6163 7. Added "dereference=" facility to LDAP.
6165 8. Two instances of the typo "uknown" in the source files are fixed.
6167 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6168 the Configure-Makefile script screwed up while processing it.
6170 10. Incorporated PCRE 4.4.
6172 11. The SMTP synchronization check was not operating right at the start of an
6173 SMTP session. For example, it could not catch a HELO sent before the client
6174 waited for the greeting. There is now a check for outstanding input at the
6175 point when the greeting is written. Because of the duplex, asynchronous
6176 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6177 way, but not yet received, when the check is performed.
6179 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6180 on TCP/IP sockets, because this apparently causes some broken clients to
6183 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6184 unchanged) from the Cygwin maintainer.
6186 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6187 was supported instead of testing for mbx. Effectively a typo.
6189 15. The spa authenticator server code was not checking that the input it
6190 received was valid base64.
6192 16. The debug output line for the "set" modifier in ACLs was not showing the
6193 name of the variable that was being set.
6195 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6197 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6198 lookup on its own. Something else was needed to trigger the lookup. For
6199 example, a match in host_lookup or the need for a host name in a host list.
6200 Now, if $sender_host_name is referenced and the host name has not yet been
6201 looked up, a lookup is performed. If the lookup fails, the variable remains
6202 empty, and $host_lookup_failed is set to "1".
6204 19. Added "eqi" as a case-independent comparison operator.
6206 20. The saslauthd authentication condition could segfault if neither service
6207 nor realm was specified.
6209 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6210 error message that was logged was misleading, and incoming SMTP
6211 connections were dropped. The message is now more accurate, and temporary
6212 errors are given to SMTP connections.
6214 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6215 (except RSET) with a 421 error, until QUIT is received. However, it was
6216 failing to send a response to QUIT.
6218 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6219 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6220 ACL is now run after the helo_try_verify_hosts code.
6222 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6223 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6224 case-independent, so other case variants are also recognized). Apparently
6225 some systems use these upper case variants.
6227 25. If more than two messages were waiting for the same host, and a transport
6228 filter was specified for the transport, Exim sent two messages over the
6229 same TCP/IP connection, and then failed with "socket operation on non-
6230 socket" when it tried to send the third.
6232 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6234 27. The extern definition of crypt16() in expand.c was not being excluded when
6235 the OS had its own crypt16() function.
6237 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6238 as a preferred synonym for return_size_limit, both as an option and as an
6241 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6243 30. Changed the default configuration ACL to relax the local part checking rule
6244 for addresses that are not in any local domains. For these addresses,
6245 slashes and pipe symbols are allowed within local parts, but the sequence
6246 /../ is explicitly forbidden.
6248 31. SPA server authentication was not clearing the challenge buffer before
6251 32. log_message in a "warn" ACL statement was writing to the reject log as
6252 well as to the main log, which contradicts the documentation and doesn't
6253 seem right (because no rejection is happening). So I have stopped it.
6255 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6256 However, I am unable to do any testing of this.
6258 34. Fixed an infelicity in the appendfile transport. When checking directories
6259 for a mailbox, to see if any needed to be created, it was accidentally
6260 using path names with one or more superfluous leading slashes; tracing
6261 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6263 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6264 contents are added to the log line that is written for every discarded
6265 recipient. (Previously a log_message setting was ignored.)
6267 36. The ${quote: operator now quotes the string if it is empty.
6269 37. The install script runs exim in order to find its version number. If for
6270 some reason other than non-existence or emptiness, which it checks, it
6271 could not run './exim', it was installing it with an empty version number,
6272 i.e. as "exim-". This error state is now caught, and the installation is
6275 38. An argument was missing from the function that creates an error message
6276 when Exim fails to connect to the socket for saslauthd authentication.
6277 This could cause Exim to crash, or give a corrupted message.
6279 39. Added isip, isip4, and isip6 to ${if conditions.
6281 40. The ACL variables $acl_xx are now saved with the message, and can be
6282 accessed later in routers, transports, and filters.
6284 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6285 strings in the file are not string-expanded.
6287 42. If a MAIL command specified a SIZE value that was too large to fit into an
6288 int variable, the check against message_size_limit failed. Such values are
6289 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6290 day this will have to be increased, but I don't think I want to be around
6291 when emails are that large.
6298 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6299 iconv() is not standard in FreeBSD.
6301 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6302 IPv6 enabled. The observed symptom was a segmentation fault on return from
6303 the function os_common_find_running_interfaces() in src/os.c.
6305 3. In the check_special_case() function in daemon.c I had used "errno" as an
6306 argument name, which causes warnings on some systems. This was basically a
6307 typo, since it was named "eno" in the comments!
6309 4. The code that waits for the clock to tick (at a resolution of some fraction
6310 of a second) so as to ensure message-id uniqueness was always waiting for
6311 at least one whole tick, when it could have waited for less. [This is
6312 almost certainly not relevant at current processor speeds, where it is
6313 unlikely to ever wait at all. But we try to future-proof.]
6315 5. The function that sleeps for a time interval that includes fractions of a
6316 second contained a race. It did not block SIGALRM between setting the
6317 timer, and suspending (a couple of lines later). If the interval was short
6318 and the sigsuspend() was delayed until after it had expired, the suspension
6319 never ended. On busy systems this could lead to processes getting stuck for
6322 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6323 process, before it forks any delivery processes. The open lookup caching
6324 mechanism meant that the open file or database connection was passed into
6325 the delivery process. The problem was that delivery processes always tidy
6326 up cached lookup data. This could cause a problem for the next delivery
6327 process started by the queue runner, because the external queue runner
6328 process does not know about the closure. So the next delivery process
6329 still has data in the lookup cache. In the case of a file lookup, there was
6330 no problem because closing a file descriptor in a subprocess doesn't affect
6331 the parent. However, if the lookup was caching a connection to a database,
6332 the connection was closed, and the second delivery process was likely to
6333 see errors such as "PGSQL: query failed: server closed the connection
6334 unexpectedly". The problem has been fixed by closing all cached lookups
6335 in a queue runner before running a delivery process.
6337 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6338 seem to have the "const" qualifier which it has on other OS. I've
6341 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6342 *of the same type* (client or server) with the same public name that an
6343 error should be diagnosed.
6345 9. When Exim looked up a host name for an IP address, but failed to find the
6346 original IP address when looking up the host name (a safety check), it
6347 output the message "<ip address> does not match any IP for NULL", which was
6348 confusing, to say the least. The bug was that the host name should have
6349 appeared instead of "NULL".
6351 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6352 user that is built into the binary, and the -C or -D options is used, root
6353 privilege is dropped before the configuration file is read. In addition,
6354 logging is switched to stderr instead of the normal log files. If the
6355 configuration then re-defines the Exim user, the unprivileged environment
6356 is probably not what is expected, so Exim logs a panic warning message (but
6359 However, if deliver_drop_privilege is set, the unprivileged state may well
6360 be exactly what is intended, so the warning has been cut out in that case,
6361 and Exim is allowed to try to write to its normal log files.
6367 1. smtp_return_error_details was not giving details for temporary sender
6368 or receiver verification errors.
6370 2. Diagnose a configuration error if two authenticators have the same public
6373 3. Exim used not to create the message log file for a message until the first
6374 delivery attempt. This could be confusing when incoming messages were held
6375 for policy or load reasons. The message log file is now created at the time
6376 the message is received, and an initial "Received" line is written to it.
6378 4. The automatically generated man page for command line options had a minor
6379 bug that caused no ill effects; however, a more serious problem was that
6380 the procedure for building the man page automatically didn't always
6381 operate. Consequently, release 4.20 contains an out-of-date version. This
6382 shouldn't happen again.
6384 5. When building Exim with embedded Perl support, the script that builds the
6385 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6386 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6388 6. The freeze_tell option was not being used for messages that were frozen on
6389 arrival, either by an ACL or by local_scan().
6391 7. Added the smtp_incomplete_transaction log selector.
6393 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6394 was accepting AUTH without a new EHLO.
6396 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6397 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6400 10. Logging of TCP/IP connections (when configured) now happens in the main
6401 daemon process instead of the child process, so that the TCP/IP connection
6402 count is more accurate (but it can never be perfect).
6404 11. The use of "drop" in a nested ACL was not being handled correctly in the
6405 outer ACL. Now, if condition failure induced by the nested "drop" causes
6406 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6407 or "require"), the connection is dropped.
6409 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6410 that yield "discard" can now be used with an "accept" or a "discard" verb,
6411 but an error is generated for any others (because I can't see a useful way
6412 to define what should happen).
6414 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6415 are now processed in the same way as lines in the Exim configuration file.
6416 In particular, continuation lines are supported.
6418 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6420 15. Added -ti meaning -t -i.
6422 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6423 domains, and warn by logging if others are found.
6425 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6426 returned from GIFCONF when Exim is trying to find the list of interfaces on
6427 a host. The code in os.c has been modified to copy each ifreq to an aligned
6428 structure in all cases.
6430 Also, in some cases, the returned ifreq's were being copied to a 'struct
6431 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6432 means the last couple of bytes of an IPv6 address could be chopped if the
6433 ifreq contained only a normal sockaddr (14 bytes storage).
6435 18. Named domain lists were not supported in the hosts_treat_as_local option.
6436 An entry such as +xxxx was not recognized, and was treated as a literal
6439 19. Ensure that header lines added by a DATA ACL are included in the reject log
6440 if the ACL subsequently rejects the message.
6442 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6443 MD5 (which is deprecated).
6445 21. When testing a filter file using -bf, Exim was writing a message when it
6446 took the sender from a "From " line in the message, but it was not doing so
6447 when it took $return_path from a Return-Path: header line. It now does.
6449 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6450 with a valid header line field name (a series of printing characters
6451 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6453 23. Changed "disc" in the source to "disk" to conform to the documentation and
6454 the book and for uniformity.
6456 24. Ignore Sendmail's -Ooption=value command line item.
6458 25. When execve() failed while trying to run a command in a pipe transport,
6459 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6460 could be confused with a return value of 69 from the command itself. This
6461 has been changed to 127, the value the shell returns if it is asked to run
6462 a non-existent command. The wording for the related log line suggests a
6463 non-existent command as the problem.
6465 26. If received_header_text expands to an empty string, do not add a Received:
6466 header line to the message. (Well, it adds a token one on the spool, but
6467 marks it "old" so that it doesn't get used or transmitted.)
6469 27. Installed eximstats 1.28 (addition of -nt option).
6471 28. There was no check for failure on the call to getsockname() in the daemon
6472 code. This can fail if there is a shortage of resources on the system, with
6473 ENOMEM, for example. A temporary error is now given on failure.
6475 29. Contrary to the C standard, it seems that in some environments, the
6476 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6477 program. Exim now does this explicitly; it affects the formatting of
6478 timestamps using strftime().
6480 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6481 complaints. I've now initialized all the variables, to avoid this.
6483 32. Header lines added by a system filter were not being "seen" during
6484 transport-time rewrites.
6486 33. The info_callback() function passed to OpenSSL is set up with type void
6487 (*)(SSL *, int, int), as described somewhere. However, when calling the
6488 function (actually a macro) that sets it up, the type void(*)() is
6489 expected. I've put in a cast to prevent warnings from picky compilers.
6491 34. If a DNS black list lookup found a CNAME record, but there were no A
6492 records associated with the domain it pointed at, Exim crashed.
6494 35. If a DNS black list lookup returned more than one A record, Exim ignored
6495 all but the first. It now scans all returned addresses if a particular IP
6496 value is being sought. In this situation, the contents of the
6497 $dnslist_value variable are a list of all the addresses, separated by a
6500 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6501 to accept a host name and all its aliases if the forward lookup for any of
6502 them yielded the IP address of the incoming connection. Now it accepts only
6503 those names whose forward lookup yields the correct IP address. Any other
6504 names are discarded. This closes a loophole whereby a rogue DNS
6505 administrator could create reverse DNS records to break through a
6506 wildcarded host restriction in an ACL.
6508 37. If a user filter or a system filter that ran in a subprocess used any of
6509 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6510 the wrong values were passed to the pipe command ($thisaddress had the
6511 value of $0, $0 had the value of $1, etc). This bug was introduced by
6512 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6514 38. Improved the line breaking for long SMTP error messages from ACLs.
6515 Previously, if there was no break point between 40 and 75 characters, Exim
6516 left the rest of the message alone. Two changes have been made: (a) I've
6517 reduced the minimum length to 35 characters; (b) if it can't find a break
6518 point between 35 and 75 characters, it looks ahead and uses the first one
6519 that it finds. This may give the occasional overlong line, but at least the
6520 remaining text gets split now.
6522 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6523 file descriptors might be low, and that setting 1000 would always raise it.
6524 It turns out that in some environments, the limit is already over 1000 and
6525 that lowering it causes trouble. So now Exim takes care not to decrease it.
6527 40. When delivering a message, the value of $return_path is set to $sender_
6528 address at the start of routing (routers may change the value). By an
6529 oversight, this default was not being set up when an address was tested by
6530 -bt or -bv, which affected the outcome if any router or filter referred to
6533 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6534 log only when "message" or "log_message" are set. However, if one of the
6535 conditions was an address verification, or a call to a nested ACL, the
6536 messages generated by the underlying test were being passed through. This
6537 no longer happens. The underlying message is available in $acl_verify_
6538 message for both "message" and "log_message" expansions, so it can be
6539 passed through if needed.
6541 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6542 new expansion $bh_ to give the encoded byte string without charset
6543 translation. Translation happens only if iconv() is available; HAVE_ICONV
6544 indicates this at build time. HEADERS_CHARSET gives the charset to
6545 translate to; headers_charset can change it in the configuration, and
6546 "headers charset" can change it in an individual filter file.
6548 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6549 that creates RFC 2047 encoded "words" labels them as that charset instead
6550 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6551 expansion operator; (ii) when Exim creates a From: line for a local
6552 message; (iii) when a header line is rewritten to include a "phrase" part.
6554 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6555 buggy, causing it to skip the first lines of messages whose message ID
6556 ended in 'D'. This would not have bitten before Exim release 4.14, because
6557 message IDs were unlikely to end in 'D' before then. The effect was to have
6558 incorrect size information for certain domains.
6560 45. #include "config.h" was missing at the start of the crypt16.c module. This
6561 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6564 46. If there was a timeout during a "random" callout check, Exim treated it as
6565 a failure of the random address, and carried on sending RSET and the real
6566 address. If the delay was just some slowness somewhere, the response to the
6567 original RCPT would be taken as a response to RSET and so on, causing
6568 mayhem of various kinds.
6570 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6571 when I implemented it. It didn't allow for the fact that some option values
6572 may legitimately be negative (e.g. size_addition), and it didn't even do
6573 the right test for positive values.
6575 48. Domain names in DNS records are case-independent. Exim always looks them up
6576 in lower case. Some resolvers return domain names in exactly the case they
6577 appear in the zone file, that is, they may contain uppercase letters. Not
6578 all resolvers do this - some return always lower case. Exim was treating a
6579 change of case by a resolver as a change of domain, similar to a widening
6580 of a domain abbreviation. This triggered its re-routing code and so it was
6581 trying to route what was effectively the same domain again. This normally
6582 caused routing to fail (because the router wouldn't handle the domain
6583 twice). Now Exim checks for this case specially, and just changes the
6584 casing of the domain that it ultimately uses when it transmits the message
6587 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6590 50. If a filter generated a file delivery with a non-absolute name (possible if
6591 no home directory exists for the router), the forbid_file option was not
6594 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6595 the existing equality matching.
6597 52. Exim was using ints instead of ino_t variables in some places where it was
6598 dealing with inode numbers.
6600 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6601 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6602 called TMPDIR, and if it finds it is different, it changes its value.
6604 54. The smtp_printf() function is now made available to local_scan() so
6605 additional output lines can be written before returning. There is also an
6606 smtp_fflush() function to enable the detection of a dropped connection.
6607 The variables smtp_input and smtp_batched_input are exported to
6610 55. Changed the default runtime configuration: the message "Unknown user"
6611 has been removed from the ACL, and instead placed on the localuser router,
6612 using the cannot_route_message feature. This means that any verification
6613 failures that generate their own messages won't get overridden. Similarly,
6614 the "Unrouteable address" message that was in the ACL for unverifiable
6615 relay addresses has also been removed.
6617 56. Added hosts_avoid_esmtp to the smtp transport.
6619 57. The exicyclog script was not checking for the esoteric option
6620 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6621 will work only if exicyclog is run under the appropriate euid.
6623 58. Following a discussion on the list, the rules by which Exim recognises line
6624 endings on incoming messages have been changed. The -dropcr and drop_cr
6625 options are now no-ops, retained only for backwards compatibility. The
6626 following line terminators are recognized: LF CRLF CR. However, special
6627 processing applies to CR:
6629 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6630 nor a local message in the state where . is a terminator.
6632 (ii) If a bare CR is encountered in a header line, an extra space is added
6633 after the line terminator so as not to end the header. The reasoning
6634 behind this is that bare CRs in header lines are most likely either
6635 to be mistakes, or people trying to play silly games.
6637 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6638 was being incorrectly given as 18 bytes larger than it should have been.
6639 This is a VOB (very old bug).
6641 60. This may never have affected anything current, but just in case it has:
6642 When the local host is found other than at the start of a list of hosts,
6643 the local host, those with the same MX, and any that follow, are discarded.
6644 When the list in question was part of a longer list of hosts, the following
6645 hosts (not currently being processed) were also being discarded. This no
6646 longer happens. I'm not sure if this situation could ever has previously
6649 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6652 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6653 header. This is something that is recommended in a new Internet Draft, and
6654 is something that is documented as being done by Sendmail. There are two
6655 possible values. For messages generated by the autoreply transport, Exim
6658 Auto-Submitted: auto-replied
6660 whereas for all other generated messages (e.g. bounces) it adds
6662 Auto-Submitted: auto-generated
6664 63. The "personal" condition in filters now includes a test for the
6665 Auto-Submitted: header. If it contains the string "auto-" the message it
6666 not considered personal.
6668 64. Added rcpt_include_affixes as a generic transport option.
6670 65. Added queue_only_override (default true).
6672 66. Added the syslog_duplication option.
6674 67. If what should have been the first header line of a message consisted of
6675 a space followed by a colon, Exim was mis-interpreting it as a header line.
6676 It isn't of course - it is syntactically invalid and should therefore be
6677 treated as the start of the message body. The misbehaviour could have
6678 caused a number of strange effects, including loss of data in subsequent
6679 header lines, and spool format errors.
6681 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6682 client host had authenticated. This control can now be exercised by an ACL
6683 for more flexibility.
6685 69. By default, callouts do not happen when testing with -bh. There is now a
6686 variant, -bhc, which does actually run the callout code, including
6687 consulting and updating the callout cache.
6689 70. Added support for saslauthd authentication, courtesy of Alexander
6692 71. If statvfs() failed on the spool or log directories while checking their
6693 size for availability, Exim confusingly gave the error "space shortage".
6694 Furthermore, in debugging mode it crashed with a floating point exception.
6695 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6696 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6697 serious problem, Exim now writes to the main and panic logs when this
6698 happens, with details of the failure. It then refuses to accept the
6699 incoming message, giving the message "spool directory problem" or "log
6700 directory problem" with a 421 code for SMTP messages.
6702 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6703 0, 1, and 2 exist, because some OS complain for execs without them (see
6704 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6705 descriptors. However, the code omitted to check that the open succeeded,
6706 causing mysterious errors if for some reason the permissions on /dev/null
6707 got screwed. Now Exim writes a message to the main and panic logs, and
6708 bombs out if it can't open /dev/null.
6710 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6711 interact so that it is all more flexible. It is supposed to remain
6712 backwards compatible. Also added extra_local_interfaces.
6714 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6715 to bomb out with an assertion failure - to the client this appears as a
6716 connection drop. This problem occurs in the part of the code that was taken
6717 from the Samba project. Fortunately, the assertion is in a very simple
6718 function, so I have fixed this by reproducing the function inline in the
6719 one place where it is called, and arranging for authentication to fail
6720 instead of killing the process with assert().
6722 75. The SPA client code was not working when the server requested OEM rather
6723 than Unicode encoding.
6725 76. Added code to make require_files with a specific uid setting more usable in
6726 the case where statting the file as root fails - usually a non-root-mounted
6727 NFS file system. When this happens and the failure is EACCES, Exim now
6728 forks a subprocess and does the per-uid checking as the relevant uid.
6730 77. Added process_log_path.
6732 78. If log_file_path was not explicitly set, a setting of check_log_space or
6733 check_log_inodes was ignored.
6735 79. If a space check for the spool or log partitions fails, the incident is now
6736 logged. Of course, in the latter case the data may get lost...
6738 80. Added the %p formatting code to string_format() so that it can be used to
6739 print addresses in debug_print(). Adjusted all the address printing in the
6740 debugging in store.c to use %p rather than %d.
6742 81. There was a concern that a line of code in smtp_in.c could overflow a
6743 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6744 initially expressed, the concern was not well-founded, because trailing
6745 spaces are removed early. However, if the trailing spaces were followed by
6746 a NULL, they did not get removed, so the overflow was possible. Two fixes
6749 (a) I re-wrote the offending code in a cleaner fashion.
6750 (b) If an incoming SMTP command contains a NULL character, it is rejected
6753 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6754 runs initgroups(), so that if the Exim user is in any additional groups,
6755 they will be used during message reception.
6761 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob