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.
10 Security Release including all fixes in 4.89..4.89+fixes.
12 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
14 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
15 Disable the session-cache too, which might reduce our load. Since we
16 currrectly use a new context for every connection, both as server and
17 client, there is no benefit for these.
18 GnuTLS appears to not support tickets server-side by default (we don't
19 call gnutls_session_ticket_enable_server()) but client side is enabled
20 by default on recent versions (3.1.3 +) unless the PFS priority string
23 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
24 the check for any unsuccessful recipients did not notice the limit, and
25 erroneously found still-pending ones.
27 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
28 compatible one, to avoid the (poorly documented) possibility of a config
29 file in the working directory redirecting the DB files, possibly correpting
30 some existing file. CVE-2017-10140 assigned for BDB.
32 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
33 cache-hot. Previously, although the result was properly cached, the
34 initial verify call returned a defer.
36 JH/21 Bug 2151 (partial):
37 Avoid using SIZE on the MAIL for a callout verify, on any but
38 the main verify for receipient in uncached-mode.
40 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
41 the right size to place the terminating semicolon on its own folded
42 line, the header hash was calculated to an incorrect value thanks to
43 the (relaxed) space the fold became.
45 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
46 which could crash as a result. This could lead to undeliverable messages.
48 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
49 are unsuable for non-message-specific reasons - eg. connection timeout,
50 banner-time rejection.
52 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
53 matters on fast-turnover and PID-randomising systems, which were getting
54 out-of-order delivery.
56 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
57 a possibly-overlapping copy. The symptom was that "Remote host closed
58 connection in response to HELO" was logged instead of the actual 4xx
61 JH/34 Bug 2199: fix a use-after-free while reading smtp input for header lines.
62 A crafted sequence of BDAT commands could result in in-use memory beeing
63 freed. CVE-2017-16943.
65 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
66 from SMTP input. Previously it was always done; now only done for DATA
67 and not BDAT commands. CVE-2017-16944.
69 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
70 to the message (such as an overlong header line). Previously this was
71 not done and we did not exit BDAT mode. Followon from the previous item
72 though a different problem.
78 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
79 than -2003 did; needs libidn2 in addition to libidn.
81 JH/02 The path option on a pipe transport is now expanded before use.
83 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
84 Patch provided by "Björn", documentation fix added too.
86 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
87 missing a wire-to-host endian conversion.
89 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
90 close after a BDAT command line could be taken as a following command,
91 giving a synch failure. Fix by only checking for synch immediately
92 before acknowledging the chunk.
94 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
95 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
96 macro. Patches provided by Josh Soref.
98 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
99 Previously we did not; the RFC seems ambiguous and VRFY is not listed
100 by IANA as a service extension. However, John Klensin suggests that we
103 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
104 the dkim code may be unix-mode line endings rather than smtp wire-format
105 CRLF, so prepend a CR to any bare LF.
107 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
108 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
110 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
111 the first were themselves being wrongly included in the feed into dkim
112 processing; with most chunk sizes in use this resulted in an incorrect
113 body hash calculated value.
115 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
116 DKIM signature block, for verification. Although advised against by
117 standards it is specifically not ruled illegal.
119 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
121 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
122 missing a body hash (the bh= tag).
124 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
125 It seems that HAProxy sends the Proxy Protocol information in clear and
126 only then does a TLS startup, so do the same.
128 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
129 TCP connections (such as for Spamd) unless the daemon successfully set
130 Fast Open mode on its listening sockets. This fixes breakage seen on
131 too-old kernels or those not configured for Fast Open, at the cost of
132 requiring both directions being enabled for TFO, and TFO never being used
133 by non-daemon-related Exim processes.
135 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
136 endings, at least on the first header line. Try to canonify any that get
137 past that check, despite the cost.
139 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
140 now limited to an arbitrary five deep, while parsing addresses with the
141 strip_excess_angle_brackets option enabled.
143 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
144 instead leave the unprompted TLS handshake in socket buffer for the
145 TLS library to consume.
147 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
149 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
151 JH/16 Drop variables when they go out of scope. Memory management drops a whole
152 region in one operation, for speed, and this leaves assigned pointers
153 dangling. Add checks run only under the testsuite which checks all
154 variables at a store-reset and panics on a dangling pointer; add code
155 explicitly nulling out all the variables discovered. Fixes one known
156 bug: a transport crash, where a dangling pointer for $sending_ip_address
157 originally assigned in a verify callout, is re-used.
159 PP/06 Drop '.' from @INC in various Perl scripts.
161 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
163 PP/08 Reduce a number of compilation warnings under clang; building with
164 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
165 should be warning-free.
167 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
169 HS/01 Fix portability problems introduced by PP/08 for platforms where
170 realloc(NULL) is not equivalent to malloc() [SunOS et al].
172 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
173 chunk. This allows us to accept broken chunked messages. We need a more
174 general solution here.
176 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
177 already-broken messages in the queue.
179 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
181 JH/19 Fix reference counting bug in routing-generated-address tracking.
187 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
188 supports it and a size is available (ie. the sending peer gave us one).
190 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
191 years of being deprecated). The replacements are the ACLs
192 acl_smtp_mime and acl_not_smtp_mime.
194 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
195 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
196 or even an in-clear connection were permitted. Now, if the host lookup
197 was dnssec and dane was requested then the host is only used if the
198 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
199 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
200 if one fails this test.
201 This means that a poorly-configured remote DNS will make it incommunicado;
202 but it protects against a DNS-interception attack on it.
204 JH/04 Bug 1810: make continued-use of an open smtp transport connection
205 non-noisy when a race steals the message being considered.
207 JH/05 If main configuration option tls_certificate is unset, generate a
208 self-signed certificate for inbound TLS connections.
210 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
211 in rewrites and routers.
213 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
214 and logged a warning sing 4.83; now they are a configuration file error.
216 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
217 (lacking @domain). Apply the same qualification processing as RCPT.
219 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
221 JH/10 Support ${sha256:} applied to a string (as well as the previous
224 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
225 a cutthrough deliver is pending, as we always want to make a connection.
226 This also avoids re-routing the message when later placing the cutthrough
227 connection after a verify cache hit.
228 Do not update it with the verify result either.
230 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
231 when routing results in more than one destination address.
233 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
234 signing (which inhibits the cutthrough capability). Previously only
235 the presence of an option was tested; now an expansion evaluating as
236 empty is permissible (obviously it should depend only on data available
237 when the cutthrough connection is made).
239 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
240 the relevant preceding SMTP command did not note the pipelining mode.
242 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
243 Previously they were not counted.
245 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
246 as one having no matching records. Previously we deferred the message
247 that needed the lookup.
249 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
250 distinguished as "(=".
252 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
253 for missing MX records. Previously it only worked for missing A records.
255 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
257 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
258 after the data-go-ahead and data-ack. Patch from Jason Betts.
260 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
261 even for a "none" policy. Patch from Tony Meyer.
263 JH/22 Fix continued use of a connection for further deliveries. If a port was
264 specified by a router, it must also match for the delivery to be
267 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
268 When one of the recipients of a message was unsuitable for the connection
269 (has no matching addresses), we lost track of needing to mark it
270 deferred. As a result mail would be lost.
272 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
274 JH/25 Decoding ACL controls is now done using a binary search; the source code
275 takes up less space and should be simpler to maintain. Merge the ACL
276 condition decode tables also, with similar effect.
278 JH/26 Fix problem with one_time used on a redirect router which returned the
279 parent address unchanged. A retry would see the parent address marked as
280 delivered, so not attempt the (identical) child. As a result mail would
283 JH/27 Fix a possible security hole, wherein a process operating with the Exim
284 UID can gain a root shell. Credit to http://www.halfdog.net/ for
285 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
288 JH/28 Enable {spool,log} filesystem space and inode checks as default.
289 Main config options check_{log,spool}_{inodes,space} are now
290 100 inodes, 10MB unless set otherwise in the configuration.
292 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
293 Previously it only applied to the main-section connection policy
296 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
298 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
299 by me. Added RFC7919 DH primes as an alternative.
301 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
302 are not in the system include path.
304 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
305 GnuTLS, when a session startup failed (eg because the client disconnected)
306 Exim did stdio operations after fclose. This was exposed by a recent
307 change which nulled out the file handle after the fclose.
309 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
310 signed directly by the cert-signing cert, rather than an intermediate
311 OCSP-signing cert. This is the model used by LetsEncrypt.
313 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
315 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
316 an incoming connection.
318 HS/02 Bug 1802: Do not half-close the connection after sending a request
321 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
322 fallback to "prime256v1".
324 JH/34 SECURITY: Use proper copy of DATA command in error message.
325 Could leak key material. Remotely exploitable. CVE-2016-9963.
331 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
332 and 3.4.4 - once the server is enabled to respond to an OCSP request
333 it does even when not requested, resulting in a stapling non-aware
334 client dropping the TLS connection.
336 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
337 support variable-length bit vectors. No functional change.
339 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
340 The I= interface field on outgoing lines is now after the H= remote
341 host field, same as incoming lines. There is a separate
342 outgoing_interface log selector which allows you to disable the
345 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
346 If not running log_selector +smtp_connection the mainlog would be held
347 open indefinitely after a "too many connections" event, including to a
348 deleted file after a log rotate. Leave the per net connection logging
349 leaving it open for efficiency as that will be quickly detected by the
350 check on the next write.
352 HS/01 Bug 1671: Fix post transport crash.
353 Processing the wait-<transport> messages could crash the delivery
354 process if the message IDs didn't exist for some reason. When
355 using 'split_spool_directory=yes' the construction of the spool
356 file name failed already, exposing the same netto behaviour.
358 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
359 mime_regex ACL conditions.
361 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
362 to DSN fail messages (bounces): remote IP, remote greeting, remote response
363 to HELO, local diagnostic string.
365 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
366 log line to debug. Even when configured with a tls authenticator many
367 client connections are expected to not authenticate in this way, so
368 an authenticate fail is not an error.
370 HS/02 Add the Exim version string to the process info. This way exiwhat
371 gives some more detail about the running daemon.
373 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
374 matter for fast-change records such as DNSBLs.
376 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
377 retry record, even if constant. There may be multiple transports with
378 different interface settings and the retry behaviour needs to be kept
381 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
383 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
385 JH/10 Bug 840: fix log_defer_output option of pipe transport
387 JH/11 Bug 830: use same host for all RCPTS of a message, even under
388 hosts_randomize. This matters a lot when combined with mua_wrapper.
390 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
391 ${quote_pgsql:<string>} operator.
393 JH/13 Bug 1708: avoid misaligned access in cached lookup.
395 JH/14 Change header file name for freeradius-client. Relevant if compiling
396 with Radius support; from the Gentoo tree and checked under Fedora.
398 JH/15 Bug 1712: Introduce $prdr_requested flag variable
400 JH/16 Bug 1714: Permit an empty string as expansion result for transport
401 option transport_filter, meaning no filtering.
403 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
405 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
406 defaults to "*" (all hosts). The variable is now available when not built
407 with TLS, default unset, mainly to enable keeping the testsuite sane.
408 If a server certificate is not supplied (via tls_certificate) an error is
409 logged, and clients will find TLS connections fail on startup. Presumably
410 they will retry in-clear.
411 Packagers of Exim are strongly encouraged to create a server certificate
412 at installation time.
414 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
415 with the $config_file variable.
417 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
418 in transport context, after the attempt, and per-recipient. The latter type
419 is per host attempted. The event data is the error message, and the errno
420 information encodes the lookup type (A vs. MX) used for the (first) host,
421 and the trailing two digits of the smtp 4xx response.
423 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
424 to write to mainlog (or rejectlog, paniclog) in the window between file
425 creation and permissions/ownership being changed. Particularly affects
426 installations where exicyclog is run as root, rather than exim user;
427 result is that the running daemon panics and dies.
429 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
431 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
432 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
433 "pri" and "weight". Note that the previous implicit priority given by the
434 list order is no longer honoured.
436 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
439 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
440 by defining SUPPORT_SOCKS.
442 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
443 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
444 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
445 variables are renamed to proxy_{local,external}_{address,port}.
447 JH/27 Move Internationalisation support from Experimental to mainline, enabled
448 for a build by defining SUPPORT_I18N
450 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
451 of the query string, and make ${quote_redis:} do that quoting.
453 JH/29 Move Events support from Experimental to mainline, enabled by default
454 and removable for a build by defining DISABLE_EVENT.
456 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
458 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
459 cached by the daemon.
461 JH/32 Move Redis support from Experimental to mainline, enabled for a build
462 by defining LOOKUP_REDIS. The libhiredis library is required.
464 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
465 keys are given for lookup.
467 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
468 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
469 only supported when built with TLS support. The PolarSSL SHA routines
470 are still used when the TLS library is too old for convenient support.
472 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
473 openssl_options), for security. OpenSSL forces this from version 1.1.0
474 server-side so match that on older versions.
476 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
477 allocation for $value could be released as the expansion processing
478 concluded, but leaving the global pointer active for it.
480 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
481 and to use the domains and local_parts ACL conditions.
483 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
484 incorrectly not doubled on cutthrough transmission, hence seen as a
485 body-termination at the receiving system - resulting in truncated mails.
486 Commonly the sender saw a TCP-level error, and retransmitted the message
487 via the normal store-and-forward channel. This could result in duplicates
488 received - but deduplicating mailstores were liable to retain only the
489 initial truncated version.
491 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
493 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
495 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
496 we're in there, support oversigning also; bug 1309.
498 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
500 HS/04 Add support for keep_environment and add_environment options.
502 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
503 either intentional arithmetic overflow during PRNG, or testing config-
506 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
507 delivery resulted in actual delivery. Cancel cutthrough before DATA
510 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
511 rejects a recipient: pass the reject to the originator.
513 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
514 Many were false-positives and ignorable, but it's worth fixing the
517 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
518 for the new environment-manipulation done at startup. Move the routines
519 from being local to tls.c to being global via the os.c file.
521 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
522 an extract embedded as result-arg for a map, the first arg for extract
523 is unavailable so we cannot tell if this is a numbered or keyed
524 extraction. Accept either.
530 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
533 JH/02 The smtp transport option "multi_domain" is now expanded.
535 JH/03 The smtp transport now requests PRDR by default, if the server offers
538 JH/04 Certificate name checking on server certificates, when exim is a client,
539 is now done by default. The transport option tls_verify_cert_hostnames
540 can be used to disable this per-host. The build option
541 EXPERIMENTAL_CERTNAMES is withdrawn.
543 JH/05 The value of the tls_verify_certificates smtp transport and main options
544 default to the word "system" to access the system default CA bundle.
545 For GnuTLS, only version 3.0.20 or later.
547 JH/06 Verification of the server certificate for a TLS connection is now tried
548 (but not required) by default. The verification status is now logged by
549 default, for both outbound TLS and client-certificate supplying inbound
552 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
555 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
556 Status Notification (bounce) messages are now MIME format per RFC 3464.
557 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
558 under the control of the dsn_advertise_hosts option, and routers may
559 have a dsn_lasthop option.
561 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
562 default, modifiable by a malware= option. The list separator for
563 the options can now be changed in the usual way. Bug 68.
565 JH/10 The smtp_receive_timeout main option is now expanded before use.
567 JH/11 The incoming_interface log option now also enables logging of the
568 local interface on delivery outgoing connections.
570 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
571 if the interface and destination host and port all match.
573 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
576 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
577 Patch from Andrew Lewis.
579 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
580 now supports optional time-restrictions, weighting, and priority
581 modifiers per server. Patch originally by <rommer@active.by>.
583 JH/16 The spamd_address main option now supports a mixed list of local
584 and remote servers. Remote servers can be IPv6 addresses, and
585 specify a port-range.
587 JH/17 Bug 68: The spamd_address main option now supports an optional
588 timeout value per server.
590 JH/18 Bug 1581: Router and transport options headers_add/remove can
591 now have the list separator specified.
593 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
596 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
599 JH/21 Support for the A6 type of dns record is withdrawn.
601 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
602 rather than the verbs used.
604 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
605 from 255 to 1024 chars.
607 JH/24 Verification callouts now attempt to use TLS by default.
609 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
610 are generic router options now. The defaults didn't change.
612 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
613 Original patch from Alexander Shikoff, worked over by JH.
615 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
616 files if ZCAT_COMMAND is not executable.
618 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
620 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
622 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
623 Normally benign, it bites when the pair was led to by a CNAME;
624 modern usage is to not canonicalize the domain to a CNAME target
625 (and we were inconsistent anyway for A-only vs AAAA+A).
627 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
629 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
630 when evaluating $sender_host_dnssec.
632 JH/31 Check the HELO verification lookup for DNSSEC, adding new
633 $sender_helo_dnssec variable.
635 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
637 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
639 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
641 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
642 documented as working, but never had. Support all but $spam_report.
644 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
645 added for tls authenticator.
647 HS/03 Add perl_taintmode main config option
653 TL/01 When running the test suite, the README says that variables such as
654 no_msglog_check are global and can be placed anywhere in a specific
655 test's script, however it was observed that placement needed to be near
656 the beginning for it to behave that way. Changed the runtest perl
657 script to read through the entire script once to detect and set these
658 variables, reset to the beginning of the script, and then run through
659 the script parsing/test process like normal.
661 TL/02 The BSD's have an arc4random API. One of the functions to induce
662 adding randomness was arc4random_stir(), but it has been removed in
663 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
664 function when detected.
666 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
667 cause callback expansion.
669 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
670 syntax errors in an expansion can be treated as a string instead of
671 logging or causing an error, due to the internal use of bool_lax
672 instead of bool when processing it.
674 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
675 server certificates when making smtp deliveries.
677 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
679 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
681 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
683 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
684 Merged patch from Sebastian Wiedenroth.
686 JH/05 Fix results-pipe from transport process. Several recipients, combined
687 with certificate use, exposed issues where response data items split
688 over buffer boundaries were not parsed properly. This eventually
689 resulted in duplicates being sent. This issue only became common enough
690 to notice due to the introduction of connection certificate information,
691 the item size being so much larger. Found and fixed by Wolfgang Breyha.
693 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
694 size buffer was used, resulting in syntax errors when an expansion
697 JH/07 Add support for directories of certificates when compiled with a GnuTLS
698 version 3.3.6 or later.
700 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
701 is EXPERIMENTAL_EVENT, the main-configuration and transport options
702 both become "event_action", the variables become $event_name, $event_data
703 and $event_defer_errno. There is a new variable $verify_mode, usable in
704 routers, transports and related events. The tls:cert event is now also
705 raised for inbound connections, if the main configuration event_action
708 TL/06 In test suite, disable OCSP for old versions of openssl which contained
709 early OCSP support, but no stapling (appears to be less than 1.0.0).
711 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
712 server certificate names available under the smtp transport option
713 "tls_verify_cert_hostname" now do not permit multi-component wildcard
716 JH/10 Time-related extraction expansions from certificates now use the main
717 option "timezone" setting for output formatting, and are consistent
718 between OpenSSL and GnuTLS compilations. Bug 1541.
720 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
721 encoded parameter in the incoming message. Bug 1558.
723 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
724 include certificate info, eximon was claiming there were spoolfile
727 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
729 JH/14 Log delivery-related information more consistently, using the sequence
730 "H=<name> [<ip>]" wherever possible.
732 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
733 are problematic for Debian distribution, omit them from the release
736 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
738 JH/16 Fix string representation of time values on 64bit time_t architectures.
741 JH/17 Fix a null-indirection in certextract expansions when a nondefault
742 output list separator was used.
747 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
748 checkers that were complaining about end of non-void function with no
751 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
752 This was a regression introduced in 4.83 by another bugfix.
754 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
756 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
757 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
763 TF/01 Correctly close the server side of TLS when forking for delivery.
765 When a message was received over SMTP with TLS, Exim failed to clear up
766 the incoming connection properly after forking off the child process to
767 deliver the message. In some situations the subsequent outgoing
768 delivery connection happened to have the same fd number as the incoming
769 connection previously had. Exim would try to use TLS and fail, logging
770 a "Bad file descriptor" error.
772 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
773 utilities have not been installed.
775 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
776 temporary space as the ACL may create new global variables.
778 TL/01 LDAP support uses per connection or global context settings, depending
779 upon the detected version of the libraries at build time.
781 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
782 to extract and use the src ip:port in logging and expansions as if it
783 were a direct connection from the outside internet. PPv2 support was
784 updated based on HAProxy spec change in May 2014.
786 JH/02 Add ${listextract {number}{list}{success}{fail}}.
788 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
789 Properly escape header and check for NULL return.
791 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
794 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
796 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
797 characters in header names, implemented as a verify condition.
798 Contributed by Michael Fischer v. Mollard.
800 TL/05 Rename SPF condition results err_perm and err_temp to standardized
801 results permerror and temperror. Previous values are deprecated but
802 still accepted. In a future release, err_perm and err_temp will be
803 completely removed, which will be a backward incompatibility if the
804 ACL tests for either of these two old results. Patch contributed by
805 user bes-internal on the mailing list.
807 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
809 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
810 selectors, in both main and reject logs.
812 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
815 JH/07 Add malware type "sock" for talking to simple daemon.
817 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
819 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
820 routers/transports under cutthrough routing.
822 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
823 numbers. Touch up "bool" conditional to keep the same definition.
825 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
827 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
829 JH/12 Expand items in router/transport headers_add or headers_remove lists
830 individually rather than the list as a whole. Bug 1452.
832 Required for reasonable handling of multiple headers_ options when
833 they may be empty; requires that headers_remove items with embedded
834 colons must have them doubled (or the list-separator changed).
836 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
837 view the policy declared in the DMARC record. Currently, $dmarc_status
838 is a combined value of both the record presence and the result of the
841 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
843 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
844 dnslookup router and the smtp transport (applying to the forward
847 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
848 of ldap servers used for a specific lookup. Patch provided by Heiko
851 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
852 New variable $lookup_dnssec_authenticated for observability.
854 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
855 Patch submitted by Lars Timman.
857 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
859 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
860 Requires trusted mode and valid format message id, aborts otherwise.
861 Patch contributed by Heiko Schlichting.
863 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
864 certextract with support for various fields. Bug 1358.
866 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
867 is requested by default, modifiable by smtp transport option
870 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
871 operate on certificate variables to give certificate fingerprints
872 Also new ${sha256:cert_variable}.
874 JH/23 The PRDR feature is moved from being Experimental into the mainline.
876 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
877 Christian Aistleitner.
879 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
881 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
882 file. Patch from Wolfgang Breyha.
884 JH/25 Expand the coverage of the delivery $host and $host_address to
885 client authenticators run in verify callout. Bug 1476.
887 JH/26 Port service names are now accepted for tls_on_connect_ports, to
888 align with daemon_smtp_ports. Bug 72.
890 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
891 support and error reporting did not work properly.
893 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
894 and is readable. Patch from Andrew Colin Kissa.
896 TL/14 Enhance documentation of ${run expansion and how it parses the
897 commandline after expansion, particularly in the case when an
898 unquoted variable expansion results in an empty value.
900 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
902 PP/02 Fix internal collision of T_APL on systems which support RFC3123
903 by renaming away from it. Addresses GH issue 15, reported by
906 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
908 TL/15 SECURITY: prevent double expansion in math comparison functions
909 (can expand unsanitized data). Not remotely exploitable.
916 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
918 PP/02 Make -n do something, by making it not do something.
919 When combined with -bP, the name of an option is not output.
921 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
924 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
925 $sender_host_name and config options to manage this, and basic check
928 PP/05 DSCP support for outbound connections and control modifier for inbound.
930 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
931 (Only plugin which currently uses this is kerberos4, which nobody should
932 be using, but we should make it available and other future plugins might
933 conceivably use it, even though it would break NAT; stuff *should* be
934 using channel bindings instead).
936 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
937 name; added for Sendmail compatibility; requires admin caller.
938 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
939 just ignore it); requires trusted caller.
940 Also parse but ignore: -Ac -Am -X<logfile>
943 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
945 TL/02 Add +smtp_confirmation as a default logging option.
947 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
948 Patch by Magnus Holmgren from 2007-02-20.
950 TL/04 Bugzilla 1281 - Spec typo.
951 Bugzilla 1283 - Spec typo.
952 Bugzilla 1290 - Spec grammar fixes.
954 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
956 TL/06 Add Experimental DMARC support using libopendmarc libraries.
958 TL/07 Fix an out of order global option causing a segfault. Reported to dev
959 mailing list by by Dmitry Isaikin.
961 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
963 JH/02 Support "G" suffix to numbers in ${if comparisons.
965 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
967 NM/01 Bugzilla 1197 - Spec typo
968 Bugzilla 1196 - Spec examples corrections
970 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
972 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
973 gnutls_enable_pkcs11, but renamed to more accurately indicate its
976 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
977 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
979 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
980 "acl {{name}{arg}...}", and optional args on acl condition
983 JH/05 Permit multiple router/transport headers_add/remove lines.
985 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
987 JH/07 Avoid using a waiting database for a single-message-only transport.
988 Performance patch from Paul Fisher. Bugzilla 1262.
990 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
993 JH/09 Add $headers_added variable, with content from use of ACL modifier
994 add_header (but not yet added to the message). Bugzilla 199.
996 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
997 Pulled from Bugzilla 817 by Wolfgang Breyha.
999 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1001 (nb: this is the same fix as in Exim 4.80.1)
1003 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1006 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1009 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1011 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1012 advertise SMTP AUTH mechanism to us, instead of a generic
1013 protocol violation error. Also, make Exim more robust to bad
1014 data from the Dovecot auth socket.
1016 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1018 When a queue runner is handling a message, Exim first routes the
1019 recipient addresses, during which it prunes them based on the retry
1020 hints database. After that it attempts to deliver the message to
1021 any remaining recipients. It then updates the hints database using
1024 So if a recipient address works intermittently, it can get repeatedly
1025 deferred at routing time. The retry hints record remains fresh so the
1026 address never reaches the final cutoff time.
1028 This is a fairly common occurrence when a user is bumping up against
1029 their storage quota. Exim had some logic in its local delivery code
1030 to deal with this. However it did not apply to per-recipient defers
1031 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1033 This change adds a proper retry rule check during routing so that the
1034 final cutoff time is checked against the message's age. We only do
1035 this check if there is an address retry record and there is not a
1036 domain retry record; this implies that previous attempts to handle
1037 the address had the retry_use_local_parts option turned on. We use
1038 this as an approximation for the destination being like a local
1039 delivery, as in LMTP.
1041 I suspect this new check makes the old local delivery cutoff check
1042 redundant, but I have not verified this so I left the code in place.
1044 TF/02 Correct gecos expansion when From: is a prefix of the username.
1046 Test 0254 submits a message to Exim with the header
1050 When I ran the test suite under the user fanf2, Exim expanded
1051 the header to contain my full name, whereas it should have added
1052 a Resent-Sender: header. It erroneously treats any prefix of the
1053 username as equal to the username.
1055 This change corrects that bug.
1057 GF/01 DCC debug and logging tidyup
1058 Error conditions log to paniclog rather than rejectlog.
1059 Debug lines prefixed by "DCC: " to remove any ambiguity.
1061 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1063 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1064 Bug spotted by Jeremy Harris; was flawed since initial commit.
1065 Would have resulted in OCSP responses post-SNI triggering an Exim
1066 NULL dereference and crash.
1068 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1070 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1071 Bug detection, analysis and fix by Samuel Thibault.
1072 Bugzilla 1331, Debian bug #698092.
1074 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1076 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1077 Server implementation by Todd Lyons, client by JH.
1078 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1079 config variable "prdr_enable" controls whether the server
1080 advertises the facility. If the client requests PRDR a new
1081 acl_data_smtp_prdr ACL is called once for each recipient, after
1082 the body content is received and before the acl_smtp_data ACL.
1083 The client is controlled by both of: a hosts_try_prdr option
1084 on the smtp transport, and the server advertisement.
1085 Default client logging of deliveries and rejections involving
1086 PRDR are flagged with the string "PRDR".
1088 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1089 fclose(). Diagnosis by Todd Lyons.
1091 PP/17 Update configure.default to handle IPv6 localhost better.
1092 Patch by Alain Williams (plus minor tweaks).
1095 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1096 This is now consistent with GnuTLS, and is now documented: the
1097 previous undocumented portable approach to treating the option as
1098 unset was to force an expansion failure. That still works, and
1099 an empty string is now equivalent.
1101 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1102 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1103 not performing validation itself.
1105 PP/20 Added force_command boolean option to pipe transport.
1106 Patch from Nick Koston, of cPanel Inc.
1108 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1111 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1113 PP/21 Fix eximon continuous updating with timestamped log-files.
1114 Broken in a format-string cleanup in 4.80, missed when I repaired the
1115 other false fix of the same issue.
1116 Report and fix from Heiko Schlichting.
1119 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1120 Report from Prashanth Katuri.
1122 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1123 It's SecureTransport, so affects any MacOS clients which use the
1124 system-integrated TLS libraries, including email clients.
1126 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1127 using a MIME ACL for non-SMTP local injection.
1128 Report and assistance in diagnosis by Warren Baker.
1130 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1132 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1134 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1135 last id that failed so it may be referenced in subsequent ACL's.
1137 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1140 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1141 ldap library initialization, allowing self-signed CA's to be
1142 used. Also properly sets require_cert option later in code by
1143 using NULL (global ldap config) instead of ldap handle (per
1144 session). Bug diagnosis and testing by alxgomz.
1146 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1147 the src/util/ subdirectory.
1149 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1150 renamed to Transport Post Delivery Action by Jeremy Harris, as
1153 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1154 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1155 redis_servers = needs to be configured which will be used by the redis
1156 lookup. Patch from Warren Baker, of The Packet Hub.
1158 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1160 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1161 hostname or reverse DNS when processing a host list. Used suggestions
1162 from multiple comments on this bug.
1164 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1166 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1167 Missed a few lines, added it to make the runtest require no keyboard
1170 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1171 contains upper case chars. Make router use caseful_local_part.
1173 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1174 support when GnuTLS has been built with p11-kit.
1180 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1182 This, or similar/improved, will also be change PP/11 of 4.82.
1188 PP/01 Handle short writes when writing local log-files.
1189 In practice, only affects FreeBSD (8 onwards).
1190 Bugzilla 1053, with thanks to Dmitry Isaikin.
1192 NM/01 Bugzilla 949 - Documentation tweak
1194 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1197 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1199 PP/02 Implemented gsasl authenticator.
1201 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1203 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1204 `pkg-config foo` for cflags/libs.
1206 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1207 with rest of GSASL and with heimdal_gssapi.
1209 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1210 `pkg-config foo` for cflags/libs for the TLS implementation.
1212 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1213 properties get this fed in as external SSF. A number of robustness
1214 and debugging improvements to the cyrus_sasl authenticator.
1216 PP/08 cyrus_sasl server now expands the server_realm option.
1218 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1219 Patch by Jeremy Harris.
1221 PP/10 Added dbmjz lookup type.
1223 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1225 PP/12 MAIL args handles TAB as well as SP, for better interop with
1226 non-compliant senders.
1227 Analysis and variant patch by Todd Lyons.
1229 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1230 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1231 Patch from Dirk Mueller <dmueller@suse.com>
1233 PP/13 tls_peerdn now print-escaped for spool files.
1234 Observed some $tls_peerdn in wild which contained \n, which resulted
1235 in spool file corruption.
1237 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1238 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1239 or write after TLS renegotiation, which otherwise led to messages
1242 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1243 as a tracking header (ie: a signed header comes before the signature).
1244 Patch from Wolfgang Breyha.
1246 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1247 comma-sep list; embedded commas doubled.
1249 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1251 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1253 Report and patch from Dmitry Banschikov.
1255 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1256 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1257 failures. We appear to now support TLS1.1+ with Exim.
1259 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1260 lets Exim select keys and certificates based upon TLS SNI from client.
1261 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1262 before an outbound SMTP session. New log_selector, +tls_sni.
1264 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1265 NULL dereference. Report and patch from Alun Jones.
1267 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1268 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1269 Not seeing resolver debug output on NetBSD, but suspect this is a
1270 resolver implementation change.
1272 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1273 Left warnings. Added "eximon gdb" invocation mode.
1275 PP/21 Defaulting "accept_8bitmime" to true, not false.
1277 PP/22 Added -bw for inetd wait mode support.
1279 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1280 locate the relevant includes and libraries. Made this the default.
1282 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1283 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1285 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1286 This may cause build issues on older platforms.
1288 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1289 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1290 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1291 Added SNI support via GnuTLS too.
1292 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1294 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1296 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1297 Applied second patch from Janne, implementing suggestion to default
1298 multiple-strings-in-record handling to match SPF spec.
1300 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1302 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1303 read-only, out of scope).
1304 Patch from Wolfgang Breyha, report from Stuart Northfield.
1306 PP/29 Fix three issues highlighted by clang analyser static analysis.
1307 Only crash-plausible issue would require the Cambridge-specific
1308 iplookup router and a misconfiguration.
1309 Report from Marcin Mirosław.
1311 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1313 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1314 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1315 As part of this, removing so much warning spew let me fix some minor
1316 real issues in debug logging.
1318 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1319 assignment on my part. Fixed.
1321 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1322 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1323 Janne Snabb (who went above and beyond: thank you).
1325 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1326 string otherwise requires a connection and a bunch more work and it's
1327 relatively easy to get wrong. Should also expose TLS library linkage
1330 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1331 64-bit ${eval} (JH/03).
1333 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1334 GNU libc to support some of the 64-bit stuff, should not lead to
1335 conflicts. Defined before os.h is pulled in, so if a given platform
1336 needs to override this, it can.
1338 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1339 protection layer was required, which is not implemented.
1340 Bugzilla 1254, patch from Wolfgang Breyha.
1342 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1343 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1344 tls_dhparam take prime identifiers. Also unbreak combination of
1345 OpenSSL+DH_params+TLSSNI.
1347 PP/39 Disable SSLv2 by default in OpenSSL support.
1353 PP/01 Solaris build fix for Oracle's LDAP libraries.
1354 Bugzilla 1109, patch from Stephen Usher.
1356 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1358 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1361 TF/02 Fix a couple more cases where we did not log the error message
1362 when unlink() failed. See also change 4.74-TF/03.
1364 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1365 lock up or crash if it happened to be inside a call to libc when it
1366 got a SIGUSR1 from exiwhat.
1368 The SIGUSR1 handler appends the current process status to the process
1369 log which is later printed by exiwhat. It used to use the general
1370 purpose logging code to do this, but several functions it calls are
1371 not safe for signals.
1373 The new output code in the SIGUSR1 handler is specific to the process
1374 log, and simple enough that it's easy to inspect for signal safety.
1375 Removing some special cases also simplifies the general logging code.
1376 Removing the spurious timestamps from the process log simplifies
1379 TF/04 Improved ratelimit ACL condition.
1381 The /noupdate option has been deprecated in favour of /readonly which
1382 has clearer semantics. The /leaky, /strict, and /readonly update modes
1383 are mutually exclusive. The update mode is no longer included in the
1384 database key; it just determines when the database is updated. (This
1385 means that when you upgrade Exim will forget old rate measurements.)
1387 Exim now checks that the per_* options are used with an update mode that
1388 makes sense for the current ACL. For example, when Exim is processing a
1389 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1390 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1391 must specify per_mail/readonly. If you omit the update mode it defaults to
1392 /leaky where that makes sense (as before) or /readonly where required.
1394 The /noupdate option is now undocumented but still supported for
1395 backwards compatibility. It is equivalent to /readonly except that in
1396 ACLs where /readonly is required you may specify /leaky/noupdate or
1397 /strict/noupdate which are treated the same as /readonly.
1399 A useful new feature is the /count= option. This is a generalization
1400 of the per_byte option, so that you can measure the throughput of other
1401 aggregate values. For example, the per_byte option is now equivalent
1402 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1404 The per_rcpt option has been generalized using the /count= mechanism
1405 (though it's more complicated than the per_byte equivalence). When it is
1406 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1407 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1408 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1409 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1410 Note that using per_rcpt with a non-readonly update mode in more than
1411 one ACL will cause the recipients to be double-counted. (The per_mail
1412 and per_byte options don't have this problem.)
1414 The handling of very low rates has changed slightly. If the computed rate
1415 is less than the event's count (usually one) then this event is the first
1416 after a long gap. In this case the rate is set to the same as this event's
1417 count, so that the first message of a spam run is counted properly.
1419 The major new feature is a mechanism for counting the rate of unique
1420 events. The new per_addr option counts the number of different
1421 recipients that someone has sent messages to in the last time period. It
1422 behaves like per_rcpt if all the recipient addresses are different, but
1423 duplicate recipient addresses do not increase the measured rate. Like
1424 the /count= option this is a general mechanism, so the per_addr option
1425 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1426 example, measure the rate that a client uses different sender addresses
1427 with the options per_mail/unique=$sender_address. There are further
1428 details in the main documentation.
1430 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1432 TF/06 Removed a few PCRE remnants.
1434 TF/07 Automatically extract Exim's version number from tags in the git
1435 repository when doing development or release builds.
1437 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1438 Bugzilla 879. Patch from Paul Fisher.
1440 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1441 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1444 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1446 PP/05 Variable $av_failed, true if the AV scanner deferred.
1447 Bugzilla 1078. Patch from John Horne.
1449 PP/06 Stop make process more reliably on build failure.
1450 Bugzilla 1087. Patch from Heiko Schlittermann.
1452 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1453 Bugzilla 1089. Patch from Heiko Schlittermann.
1455 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1456 Bugzilla 1131. Patch from Holger Weiß.
1458 PP/09 Handle IPv6 addresses with SPF.
1459 Bugzilla 860. Patch from Wolfgang Breyha.
1461 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1463 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1466 PP/11 match_* no longer expand right-hand-side by default.
1467 New compile-time build option, EXPAND_LISTMATCH_RHS.
1468 New expansion conditions, "inlist", "inlisti".
1470 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1472 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1474 PP/14 fix log_write() format string regression from TF/03.
1475 Bugzilla 1152. Patch from Dmitry Isaikin.
1481 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1483 PP/02 Harmonised TLS library version reporting; only show if debugging.
1484 Layout now matches that introduced for other libraries in 4.74 PP/03.
1486 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1488 PP/04 New "dns_use_edns0" global option.
1490 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1493 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1494 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1496 TK/01 Updated PolarSSL code to 0.14.2.
1497 Bugzilla 1097. Patch from Andreas Metzler.
1499 PP/07 Catch divide-by-zero in ${eval:...}.
1500 Fixes bugzilla 1102.
1502 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1505 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1506 format-string attack -- SECURITY: remote arbitrary code execution.
1508 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1509 time unintentionally subject to list matching rules, letting the header
1510 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1511 arbitrary string expansion). This allowed for information disclosure.
1513 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1514 INT_MIN/-1 -- value coerced to INT_MAX.
1520 NM/01 Workaround for PCRE version dependency in version reporting
1523 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1524 This fixes portability to compilers other than gcc, notably
1525 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1527 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1528 makefiles for portability to HP-UX and POSIX correctness.
1530 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1531 Also via indented variable definition in the Makefile.
1532 (Debugging by Oliver Heesakkers).
1534 PP/02 Restore caching of spamd results with expanded spamd_address.
1535 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1537 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1538 Improves build reliability. Fix from: Frank Elsner
1540 NM/02 Fix wide character breakage in the rfc2047 coding
1541 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1543 NM/03 Allow underscore in dnslist lookups
1544 Fixes bug 1026. Patch from Graeme Fowler
1546 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1547 Code patches from Adam Ciarcinski of NetBSD.
1549 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1552 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1553 is logged, to avoid truncation. Patch from John Horne.
1555 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1556 Patch from Jakob Hirsch.
1558 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1559 SQL string expansion failure details.
1560 Patch from Andrey Oktyabrski.
1562 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1563 Patch from Simon Arlott.
1565 PP/09 New lookups functionality failed to compile on old gcc which rejects
1566 extern declarations in function scope.
1567 Patch from Oliver Fleischmann
1569 PP/10 Use sig_atomic_t for flags set from signal handlers.
1570 Check getgroups() return and improve debugging.
1571 Fixed developed for diagnosis in bug 927 (which turned out to be
1574 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1575 Patch from Mark Zealey.
1577 PP/12 Bugzilla 1056: Improved spamd server selection.
1578 Patch from Mark Zealey.
1580 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1581 Based on patch from Heiko Schlittermann.
1583 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1584 Patch from Uwe Doering, sign-off by Michael Haardt.
1586 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1587 variable declaration deep within a block. Bug and patch from
1590 PP/15 lookups-Makefile IRIX compatibility coercion.
1592 PP/16 Make DISABLE_DKIM build knob functional.
1594 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1595 Patch by Simon Arlott
1597 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1598 variable argument macros. Our copy now differs from upstream.
1604 TF/01 Failure to get a lock on a hints database can have serious
1605 consequences so log it to the panic log.
1607 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1608 controlled using the smtp_confirmation log selector.
1610 TF/03 Include the error message when we fail to unlink a spool file.
1612 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1613 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1614 for maintaining out-of-tree patches for some time.
1616 PP/01 Bugzilla 139: Documentation and portability issues.
1617 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1618 Handle per-OS dynamic-module compilation flags.
1620 PP/02 Let /dev/null have normal permissions.
1621 The 4.73 fixes were a little too stringent and complained about the
1622 permissions on /dev/null. Exempt it from some checks.
1623 Reported by Andreas M. Kirchwitz.
1625 PP/03 Report version information for many libraries, including
1626 Exim version information for dynamically loaded libraries. Created
1627 version.h, now support a version extension string for distributors
1628 who patch heavily. Dynamic module ABI change.
1630 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1631 privilege escalation vulnerability whereby the Exim run-time user
1632 can cause root to append content of the attacker's choosing to
1635 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1638 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1639 If dropping privileges for untrusted macros, we disabled normal logging
1640 on the basis that it would fail; for the Exim run-time user, this is not
1641 the case, and it resulted in successful deliveries going unlogged.
1642 Fixed. Reported by Andreas Metzler.
1648 PP/01 Date: & Message-Id: revert to normally being appended to a message,
1649 only prepend for the Resent-* case. Fixes regression introduced in
1650 Exim 4.70 by NM/22 for Bugzilla 607.
1652 PP/02 Include check_rfc2047_length in configure.default because we're seeing
1653 increasing numbers of administrators be bitten by this.
1655 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
1657 PP/03 Bugzilla 994: added openssl_options main configuration option.
1659 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
1661 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
1663 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
1665 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
1666 without a peer certificate, leading to a segfault because of an
1667 assumption that peers always have certificates. Be a little more
1668 paranoid. Problem reported by Martin Tscholak.
1670 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
1671 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
1672 NB: ClamAV planning to remove STREAM in "middle of 2010".
1673 CL also introduces -bmalware, various -d+acl logging additions and
1674 more caution in buffer sizes.
1676 PP/09 Implemented reverse_ip expansion operator.
1678 PP/10 Bugzilla 937: provide a "debug" ACL control.
1680 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
1682 PP/12 Bugzilla 973: Implement --version.
1684 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
1686 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
1688 PP/15 Bugzilla 816: support multiple condition rules on Routers.
1690 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
1691 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
1692 ignore trailing whitespace.
1694 JJ/02 prevent non-panic DKIM error from being sent to paniclog
1696 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
1699 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
1700 Notification from Dr Andrew Aitchison.
1702 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
1703 ExtendedDetectionInfo response format.
1704 Notification from John Horne.
1706 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
1709 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
1710 XSL and documented dependency on system catalogs, with examples of how
1713 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1716 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1717 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1718 configuration file which is writeable by the Exim user or group.
1720 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1721 of configuration files to cover files specified with the -C option if
1722 they are going to be used with root privileges, not just the default
1725 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1726 option (effectively making it always true).
1728 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1729 files to be used while preserving root privileges.
1731 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1732 that rogue child processes cannot use them.
1734 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1735 run-time user, instead of root.
1737 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1738 Exim run-time user without dropping privileges.
1740 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1741 result string, instead of calling string_vformat() twice with the same
1744 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1745 for other users. Others should always drop root privileges if they use
1746 -C on the command line, even for a whitelisted configure file.
1748 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1750 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1756 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1757 $data_path, and $header_path variables; fixed documentation bugs and
1760 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1761 exipick to access non-standard spools, including the "frozen" queue
1764 NM/01 Bugzilla 965: Support mysql stored procedures.
1765 Patch from Alain Williams
1767 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1769 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1770 Patch from Andreas Metzler
1772 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1773 Patch from Kirill Miazine
1775 NM/05 Bugzilla 671: Added umask to procmail example.
1777 JJ/03 installed exipick 20100323.0, fixing doc bug
1779 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1780 directory. Notification and patch from Dan Rosenberg.
1782 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1784 TK/02 Improve log output when DKIM signing operation fails.
1786 MH/01 Treat the transport option dkim_domain as a colon separated
1787 list, not as a single string, and sign the message with each element,
1788 omitting multiple occurences of the same signer.
1790 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1791 Bugzilla 985, 986. Patch by Simon Arlott
1793 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1794 Patch by Simon Arlott
1796 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1797 MBX locking. Notification from Dan Rosenberg.
1803 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1805 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1807 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1809 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1811 NM/04 Bugzilla 915: Flag broken perl installation during build.
1817 TK/01 Added patch by Johannes Berg that expands the main option
1818 "spamd_address" if it starts with a dollar sign.
1820 TK/02 Write list of recipients to X-Envelope-Sender header when building
1821 the mbox-format spool file for content scanning (suggested by Jakob
1824 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1825 (http://www.dcc-servers.net/) support via dccifd. Activated by
1826 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1828 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1829 by Mark Daniel Reidel <mr@df.eu>.
1831 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1832 When building exim an external PCRE library is now needed -
1833 PCRE is a system library on the majority of modern systems.
1834 See entry on PCRE_LIBS in EDITME file.
1836 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1837 conversation. Added nologin parameter to request.
1838 Patch contributed by Kirill Miazine.
1840 TF/01 Do not log submission mode rewrites if they do not change the address.
1842 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1844 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1845 log files in place. Contributed by Roberto Lima.
1847 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1849 TF/03 Bugzilla 615: When checking the local_parts router precondition
1850 after a local_part_suffix or local_part_prefix option, Exim now
1851 does not use the address's named list lookup cache, since this
1852 contains cached lookups for the whole local part.
1854 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1855 Robert Millan. Documentation is in experimental-spec.txt.
1857 TF/04 Bugzilla 668: Fix parallel build (make -j).
1859 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1861 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1862 Patch provided by Jan Srzednicki.
1864 TF/05 Leading white space used to be stripped from $spam_report which
1865 wrecked the formatting. Now it is preserved.
1867 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1868 that they are available at delivery time.
1870 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1872 TF/08 TLS error reporting now respects the incoming_interface and
1873 incoming_port log selectors.
1875 TF/09 Produce a more useful error message if an SMTP transport's hosts
1876 setting expands to an empty string.
1878 NM/06 Bugzilla 744: EXPN did not work under TLS.
1879 Patch provided by Phil Pennock.
1881 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1882 Patch provided by Richard Godbee.
1884 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1885 acl_smtp_notquit, added index entry.
1887 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1888 Patch provided by Eugene Bujak.
1890 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1891 accept(). Patch provided by Maxim Dounin.
1893 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1894 Patch provided by Phil Pennock.
1896 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1898 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1899 Patch provided by Brad "anomie" Jorsch.
1901 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1902 Patch provided by Dean Brooks.
1904 TK/05 Add native DKIM support (does not depend on external libraries).
1906 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1907 Patch provided by Graeme Fowler.
1909 NM/16 Bugzilla 851: Documentation example syntax fix.
1911 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1913 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1916 NM/19 Bugzilla 745: TLS version reporting.
1917 Patch provided by Phil Pennock.
1919 NM/20 Bugzilla 167: bool: condition support.
1920 Patch provided by Phil Pennock.
1922 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1923 clients. Patch provided by Phil Pennock.
1925 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1926 Patch provided by Brad "anomie" Jorsch.
1928 NM/23 Bugzilla 687: Fix misparses in eximstats.
1929 Patch provided by Heiko Schlittermann.
1931 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1932 Patch provided by Heiko Schlittermann.
1934 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1935 plus update to original patch.
1937 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1939 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1940 Patch provided by David Brownlee.
1942 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1944 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1946 NM/30 Bugzilla 888: TLS documentation bugfixes.
1948 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1950 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1951 Unlike the original bugzilla I have changed all shell scripts in src tree.
1953 NM/33 Bugzilla 898: Transport filter timeout fix.
1954 Patch by Todd Rinaldo.
1956 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1957 Patch by Serge Demonchaux.
1959 NM/35 Bugzilla 39: Base64 decode bug fixes.
1960 Patch by Jakob Hirsch.
1962 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1964 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1966 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1968 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1974 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1975 ALT-N's libdkim that I have put here:
1976 http://duncanthrax.net/exim-experimental/
1978 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1979 were called 'true' and it seems that C99 defines that as a reserved
1980 keyword to be used with 'bool' variable types. That means you could
1981 not include C99-style headers which use bools without triggering
1982 build errors in sieve.c.
1984 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1985 as mailq or other aliases. Changed the --help handling significantly
1986 to do whats expected. exim_usage() emits usage/help information.
1988 SC/01 Added the -bylocaldomain option to eximstats.
1990 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1992 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1994 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2000 PH/01 Another patch from the Sieve maintainer.
2002 PH/02 When an IPv6 address is converted to a string for single-key lookup
2003 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2004 dots are used instead of colons so that keys in lsearch files need not
2005 contain colons. This was done some time before quoting was made available
2006 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2007 (notated using the quote facility) so as to distinguish them from IPv4
2008 keys. This meant that lookups for IP addresses in host lists did not work
2009 for iplsearch lookups.
2011 This has been fixed by arranging for IPv6 addresses to be expressed with
2012 colons if the lookup type is iplsearch. This is not incompatible, because
2013 previously such lookups could never work.
2015 The situation is now rather anomalous, since one *can* have colons in
2016 ordinary lsearch keys. However, making the change in all cases is
2017 incompatible and would probably break a number of configurations.
2019 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2022 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2023 conversion specification without a maximum field width, thereby enabling
2024 a rogue spamd server to cause a buffer overflow. While nobody in their
2025 right mind would setup Exim to query an untrusted spamd server, an
2026 attacker that gains access to a server running spamd could potentially
2027 exploit this vulnerability to run arbitrary code as the Exim user.
2029 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2030 $primary_hostname instead of what libspf2 thinks the hosts name is.
2032 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2033 a directory entry by the name of the lookup key. Previously, if a
2034 symlink pointed to a non-existing file or a file in a directory that
2035 Exim lacked permissions to read, a lookup for a key matching that
2036 symlink would fail. Now it is enough that a matching directory entry
2037 exists, symlink or not. (Bugzilla 503.)
2039 PH/03 The body_linecount and body_zerocount variables are now exported in the
2042 PH/04 Added the $dnslist_matched variable.
2044 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2045 This means they are set thereafter only if the connection becomes
2048 PH/06 Added the client_condition to authenticators so that some can be skipped
2049 by clients under certain conditions.
2051 PH/07 The error message for a badly-placed control=no_multiline_responses left
2052 "_responses" off the end of the name.
2054 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2056 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2057 (without spaces) instead of just copying the configuration text.
2059 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2061 PH/11 Added $max_received_linelength.
2063 PH/12 Added +ignore_defer and +include_defer to host lists.
2065 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2066 way in which PCRE > 7.0 is built.
2068 PH/14 Implemented queue_only_load_latch.
2070 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2071 MAIL command. The effect was to mangle the value on 64-bit systems.
2073 PH/16 Another patch from the Sieve maintainer.
2075 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2077 PH/18 If a system quota error occurred while trying to create the file for
2078 a maildir delivery, the message "Mailbox is full" was not appended to the
2079 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2080 only to a quota excession during the actual writing of the file.
2082 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2083 characters?) which causes problems in log lines. The DN values are now
2084 passed through string_printing() before being added to log lines.
2086 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2087 and InterBase are left for another time.)
2089 PH/21 Added message_body_newlines option.
2091 PH/22 Guard against possible overflow in moan_check_errorcopy().
2093 PH/23 POSIX allows open() to be a macro; guard against that.
2095 PH/24 If the recipient of an error message contained an @ in the local part
2096 (suitably quoted, of course), incorrect values were put in $domain and
2097 $local_part during the evaluation of errors_copy.
2103 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2104 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2107 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2108 issue a MAIL command.
2110 PH/02 In an ACL statement such as
2112 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2114 if a client was not listed at all, or was listed with a value other than
2115 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2116 the condition was not true (as it should be), so access was not denied.
2117 The bug was that the ! inversion was incorrectly passed on to the second
2118 item. This has been fixed.
2120 PH/03 Added additional dnslists conditions == and =& which are different from
2121 = and & when the dns lookup returns more than one IP address.
2123 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2124 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2126 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2127 FSYNC, which compiles an option called disable_fsync that allows for
2128 bypassing fsync(). The documentation is heavily laced with warnings.
2130 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2132 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2133 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2134 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2135 including adding "make clean"; (3) Added -fPIC when compiling the test
2136 dynamically loaded module, to get rid of a warning.
2138 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2139 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2140 = 0s. The bug is otherwise harmless.
2142 PH/07 There was a bug in the dovecot authenticator such that the value of
2143 $auth1 could be overwritten, and so not correctly preserved, after a
2144 successful authentication. This usually meant that the value preserved by
2145 the server_setid option was incorrect.
2147 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2149 PH/09 Installed PCRE release 7.0.
2151 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2152 run for batched SMTP input. It is now run at the start of every message
2153 in the batch. While fixing this I discovered that the process information
2154 (output by running exiwhat) was not always getting set for -bs and -bS
2155 input. This is fixed, and it now also says "batched" for BSMTP.
2157 PH/11 Added control=no_pipelining.
2159 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2160 patch, slightly modified), and move the expansion of helo_data till after
2161 the connection is made in the smtp transport (so it can use these
2164 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2166 PH/14 Added log_selector = +pid.
2168 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2170 PH/16 Add ${if forany and ${if forall.
2172 PH/17 Added dsn_from option to vary the From: line in DSNs.
2174 PH/18 Flush SMTP output before performing a callout, unless control =
2175 no_callout_flush is set.
2177 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2178 was true (the default) a successful delivery failed to delete the retry
2179 item, thus causing premature timeout of the address. The bug is now
2182 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2184 PH/21 Long custom messages for fakedefer and fakereject are now split up
2185 into multiline responses in the same way that messages for "deny" and
2186 other ACL rejections are.
2188 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2189 with slight modification.
2191 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2192 draft, changing the syntax and factoring some duplicate code".
2194 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2195 for deliveries of the second and subsequent messages over the same SMTP
2198 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2199 ${reduce, with only minor "tidies".
2201 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2203 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2204 expansion side effects.
2206 PH/27 When a message times out after an over-quota error from an Exim-imposed
2207 quota, the bounce message says "mailbox is full". This message was not
2208 being given when it was a system quota that was exceeded. It now should
2211 MH/03 Made $recipients available in local_scan(). local_scan() already has
2212 better access to the recipient list through recipients_list[], but
2213 $recipients can be useful in postmaster-provided expansion strings.
2215 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2216 in the case of a MAIL command with additional options following the
2217 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2218 were accidentally chopped off.
2220 PH/29 SMTP synchronization checks are implemented when a command is read -
2221 there is a check that no more input is waiting when there shouldn't be
2222 any. However, for some commands, a delay in an ACL can mean that it is
2223 some time before the response is written. In this time, more input might
2224 arrive, invalidly. So now there are extra checks after an ACL has run for
2225 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2226 pipelining has not been advertised.
2228 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2230 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2231 returned in the SMTP response when smtp_return_error_details was false.
2232 This has been fixed.
2234 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2235 instead of the C I/O that was originally supplied, because problems were
2236 reported on Solaris.
2238 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2239 Exim which did not show up earlier: it was assuming that a call to
2240 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2241 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2242 was a macro that became an assignment, so it seemed to work. This has
2243 changed to a proper function call with a void return, hence the compile
2244 error. Exim's code has been fixed.
2246 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2249 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2251 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2253 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2254 because it turns out to be too big or there is a timeout) there is no
2255 "Completed" line in the log. When some messages of this type were
2256 selected by exigrep, they were listed as "not completed". Others were
2257 picked up by some special patterns. I have improved the selection
2258 criteria to be more general.
2260 PH/38 The host_find_failed option in the manualroute router can now be set
2261 to "ignore", to completely ignore a host whose IP address cannot be
2262 found. If all hosts are ignored, the behaviour is controlled by the new
2263 host_all_ignored option.
2265 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2266 homing or because of multiple MX records with /mx) generated more than
2267 one IP address, and the following item turned out to be the local host,
2268 all the secondary addresses of the first item were incorrectly removed
2269 from the list, along with the local host and any following hosts (which
2270 is what is supposed to happen).
2272 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2273 whoever called Exim into the -H file. In the case of the daemon it was
2274 behaving confusingly. When first started, it used values for whoever
2275 started the daemon, but after a SIGHUP it used the Exim user (because it
2276 calls itself on a restart). I have changed the code so that it now always
2279 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2280 message are rejected with the same error (e.g. no authentication or bad
2281 sender address), and a DATA command is nevertheless sent (as can happen
2282 with PIPELINING or a stupid MUA), the error message that was given to the
2283 RCPT commands is included in the rejection of the DATA command. This is
2284 intended to be helpful for MUAs that show only the final error to their
2287 PH/42 Another patch from the Sieve maintainer.
2289 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2290 Eximstats - Fixed some broken HTML links and added missing column headers
2292 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2293 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2295 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2297 PH/43 Yet another patch from the Sieve maintainer.
2299 PH/44 I found a way to check for a TCP/IP connection going away before sending
2300 the response to the final '.' that terminates a message, but only in the
2301 case where the client has not sent further data following the '.'
2302 (unfortunately, this is allowed). However, in many cases there won't be
2303 any further data because there won't be any more messages to send. A call
2304 to select() can be used: if it shows that the input is "ready", there is
2305 either input waiting, or the socket has been closed. An attempt to read
2306 the next input character can distinguish the two cases. Previously, Exim
2307 would have sent an OK response which the client would never have see.
2308 This could lead to message repetition. This fix should cure that, at
2309 least in a lot of common cases.
2311 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2312 advertised in response to EHLO.
2318 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2319 fixed by 4.65/MH/01 (is this a record?) are fixed:
2321 (i) An empty string was always treated as zero by the numeric comparison
2322 operators. This behaviour has been restored.
2324 (ii) It is documented that the numeric comparison operators always treat
2325 their arguments as decimal numbers. This was broken in that numbers
2326 starting with 0 were being interpreted as octal.
2328 While fixing these problems I realized that there was another issue that
2329 hadn't been noticed. Values of message_size_limit (both the global option
2330 and the transport option) were treated as octal if they started with 0.
2331 The documentation was vague. These values are now always treated as
2332 decimal, and I will make that clear in the documentation.
2338 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2339 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2342 MH/01 Don't check that the operands of numeric comparison operators are
2343 integers when their expansion is in "skipping" mode (fixes bug
2344 introduced by 4.64-PH/07).
2346 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2347 child addresses, Exim now panics and dies. Previously, because the count
2348 is held in a short int, deliveries were likely to be lost. As such a
2349 large number of recipients for a single message is ridiculous
2350 (performance will be very, very poor), I have chosen to impose a limit
2351 rather than extend the field.
2357 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2358 leftover -K file (the existence of which was triggered by #402).
2359 While we were at it, introduced process PID as part of the -K
2360 filename. This should rule out race conditions when creating
2363 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2364 processing considerably. Previous code took too long for large mails,
2365 triggering a timeout which in turn triggers #401.
2367 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2368 in the DK code in transports.c. sendfile() is not really portable,
2369 hence the _LINUX specificness.
2371 TF/01 In the add_headers option to the mail command in an Exim filter,
2372 there was a bug that Exim would claim a syntax error in any
2373 header after the first one which had an odd number of characters
2376 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2377 callout verification, Exim cached a "reject" for the entire domain. This
2378 is correct for most verifications, but it is not correct for a recipient
2379 verification with use_sender or use_postmaster set, because in that case
2380 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2381 case of MAIL FROM:<> rejection from other early rejections (e.g.
2382 rejection of HELO). When verifying a recipient using a non-null MAIL
2383 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2384 Whatever the result of the callout, the value of the domain cache is
2385 left unchanged (for any other kind of callout, getting as far as trying
2386 RCPT means that the domain itself is ok).
2388 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2391 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2392 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2393 session, the daemon ignores ECONNECT errors and logs others; it now
2394 ignores EPIPE as well.
2396 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2397 (quoted-printable decoding).
2399 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2400 later the small subsequent patch to fix an introduced bug.
2402 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2404 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2406 PH/08 An error is now given if message_size_limit is specified negative.
2408 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2409 to be given (somewhat) arbitrary names.
2411 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2414 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2415 miscellaneous code fixes
2417 PH/10 Added the log_reject_target ACL modifier to specify where to log
2420 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2421 hostname. This is wrong, because it relates to the incoming message (and
2422 probably the interface on which it is arriving) and not to the outgoing
2423 callout (which could be using a different interface). This has been
2424 changed to use the value of the helo_data option from the smtp transport
2425 instead - this is what is used when a message is actually being sent. If
2426 there is no remote transport (possible with a router that sets up host
2427 addresses), $smtp_active_hostname is used.
2429 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2430 tweaks were necessary in order to get it to work (see also 21 below):
2431 (a) The code assumed that strncpy() returns a negative number on buffer
2432 overflow, which isn't the case. Replaced with Exim's string_format()
2434 (b) There were several signed/unsigned issues. I just did the minimum
2435 hacking in of casts. There is scope for a larger refactoring.
2436 (c) The code used strcasecmp() which is not a standard C function.
2437 Replaced with Exim's strcmpic() function.
2438 (d) The code set only $1; it now sets $auth1 as well.
2439 (e) A simple test gave the error "authentication client didn't specify
2440 service in request". It would seem that Dovecot has changed its
2441 interface. Fortunately there's a specification; I followed it and
2442 changed what the client sends and it appears to be working now.
2444 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2447 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2448 address A is aliased to B and C, where B exists and C does not. Without
2449 -v the output is "A verified" because verification stops after a
2450 successful redirection if more than one address is generated. However,
2451 with -v the child addresses are also verified. Exim was outputting "A
2452 failed to verify" and then showing the successful verification for C,
2453 with its parentage. It now outputs "B failed to verify", showing B's
2454 parentage before showing the successful verification of C.
2456 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2457 look up a TXT record in a specific list after matching in a combined
2460 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2461 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2462 they consult the DNS. I had assumed they would set it the way they
2463 wanted; and indeed my experiments on Linux seem to show that in some
2464 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2465 To be on the safe side, however, I have now made the interface to
2466 host_find_byname() similar to host_find_bydns(), with an argument
2467 containing the DNS resolver options. The host_find_byname() function now
2468 sets these options at its start, just as host_find_bydns() does. The smtp
2469 transport options dns_qualify_single and dns_search_parents are passed to
2470 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2471 of host_find_byname() use the default settings of RES_DEFNAMES
2472 (qualify_single) but not RES_DNSRCH (search_parents).
2474 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2475 spool_read_header() do less string testing, by means of a preliminary
2476 switch on the second character of optional "-foo" lines. (This is
2477 overdue, caused by the large number of possibilities that now exist.
2478 Originally there were few.) While I was there, I also converted the
2479 str(n)cmp tests so they don't re-test the leading "-" and the first
2480 character, in the hope this might squeeze out yet more improvement.
2482 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2483 flag allowing group syntax was set by the header_syntax check but not
2484 turned off, possible causing trouble later; (2) The flag was not being
2485 set at all for the header_verify test, causing "group"-style headers to
2486 be rejected. I have now set it in this case, and also caused header_
2487 verify to ignore an empty address taken from a group. While doing this, I
2488 came across some other cases where the code for allowing group syntax
2489 while scanning a header line wasn't quite right (mostly, not resetting
2490 the flag correctly in the right place). These bugs could have caused
2491 trouble for malformed header lines. I hope it is now all correct.
2493 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2494 with the "reply" argument non-NULL. The code, however (which originally
2495 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2496 but it didn't always do it. This confused somebody who was copying the
2497 code for some other use. I have removed all the tests.
2499 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2500 feature that was used to support insecure browsers during the U.S. crypto
2501 embargo. It requires special client support, and Exim is probably the
2502 only MTA that supported it -- and would never use it because real RSA is
2503 always available. This code has been removed, because it had the bad
2504 effect of slowing Exim down by computing (never used) parameters for the
2505 RSA_EXPORT functionality.
2507 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2508 authenticator to fail if there's a tab character in the incoming data
2509 (there should never be unless someone is messing about, as it's supposed
2510 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2511 if the connection is using TLS or if the remote IP is the same as the
2512 local IP, and the "valid-client-cert option" if a client certificate has
2515 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2516 authenticators. This can be used for authorization after authentication
2517 succeeds. (In the case of plaintext, it servers for both authentication
2520 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2521 if any retry times were supplied.
2523 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2524 connection, where there is no client IP address to check. In this
2525 situation, the verify now always succeeds.
2527 PH/25 Applied John Jetmore's -Mset patch.
2529 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2531 PH/27 In a string expansion for a processed (not raw) header when multiple
2532 headers of the same name were present, leading whitespace was being
2533 removed from all of them, but trailing whitespace was being removed only
2534 from the last one. Now trailing whitespace is removed from each header
2535 before concatenation. Completely empty headers in a concatenation (as
2536 before) are ignored.
2538 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2539 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2541 PH/29 [Removed. This was a change that I later backed out, and forgot to
2542 correct the ChangeLog entry (that I had efficiently created) before
2543 committing the later change.]
2545 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2546 address errors (4xx response to RCPT) over the same connection as other
2547 messages routed to the same hosts. Such deliveries are always "forced",
2548 so retry times are not inspected. This resulted in far too many retries
2549 for the affected addresses. The effect occurred only when there were more
2550 hosts than the hosts_max_try setting in the smtp transport when it had
2551 the 4xx errors. Those hosts that it had tried were not added to the list
2552 of hosts for which the message was waiting, so if all were tried, there
2553 was no problem. Two fixes have been applied:
2555 (i) If there are any address or message errors in an SMTP delivery, none
2556 of the hosts (tried or untried) are now added to the list of hosts
2557 for which the message is waiting, so the message should not be a
2558 candidate for sending over the same connection that was used for a
2559 successful delivery of some other message. This seems entirely
2560 reasonable: after all the message is NOT "waiting for some host".
2561 This is so "obvious" that I'm not sure why it wasn't done
2562 previously. Hope I haven't missed anything, but it can't do any
2563 harm, as the worst effect is to miss an optimization.
2565 (ii) If, despite (i), such a delivery is accidentally attempted, the
2566 routing retry time is respected, so at least it doesn't keep
2567 hammering the server.
2569 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2570 in ${readsocket because some servers need this prod.
2572 PH/32 Added some extra debug output when updating a wait-xxx database.
2574 PH/33 The hint "could be header name not terminated by colon", which has been
2575 given for certain expansion errors for a long time, was not being given
2576 for the ${if def:h_colon_omitted{... case.
2578 PH/34 The spec says: "With one important exception, whenever a domain list is
2579 being scanned, $domain contains the subject domain." There was at least
2580 one case where this was not true.
2582 PH/35 The error "getsockname() failed: connection reset by peer" was being
2583 written to the panic log as well as the main log, but it isn't really
2584 panic-worthy as it just means the connection died rather early on. I have
2585 removed the panic log writing for the ECONNRESET error when getsockname()
2588 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2589 runs only) independently of the message's sender address. This meant
2590 that, if the 4xx error was in fact related to the sender, a different
2591 message to the same recipient with a different sender could confuse
2592 things. In particular, this can happen when sending to a greylisting
2593 server, but other circumstances could also provoke similar problems.
2594 I have changed the default so that the retry time for these errors is now
2595 based a combination of the sender and recipient addresses. This change
2596 can be overridden by setting address_retry_include_sender=false in the
2599 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2600 remote server are returned as part of bounce messages. This was not
2601 happening for LMTP over a pipe (the lmtp transport), but now it is the
2602 same for both kinds of LMTP.
2604 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2605 in header lines that were in fact CNAMEs. This is no longer the case.
2607 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2608 and queue runs started by the daemon processed all messages. This has
2609 been fixed so that -R and -S can now usefully be given with -q<time>.
2611 PH/40 Import PCRE release 6.7 (fixes some bugs).
2613 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2615 PH/42 Give an error if -q is specified more than once.
2617 PH/43 Renamed the variables $interface_address and $interface_port as
2618 $received_ip_address and $received_port, to make it clear that these
2619 values apply to message reception, and not to the outgoing interface when
2620 a message is delivered. (The old names remain recognized, of course.)
2622 PH/44 There was no timeout on the connect() call when using a Unix domain
2623 socket in the ${readsocket expansion. There now is.
2625 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2626 be meaningful with "accept".
2628 SC/01 Eximstats V1.43
2629 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2631 SC/02 Eximstats V1.44
2632 Use a glob alias rather than an array ref in the generated
2633 parser. This improves both readability and performance.
2635 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2636 Collect SpamAssassin and rejection statistics.
2637 Don't display local sender or destination tables unless
2638 there is data to show.
2639 Added average volumes into the top table text output.
2641 SC/04 Eximstats V1.46
2642 Collect data on the number of addresses (recipients)
2643 as well as the number of messages.
2645 SC/05 Eximstats V1.47
2646 Added 'Message too big' to the list of mail rejection
2647 reasons (thanks to Marco Gaiarin).
2649 SC/06 Eximstats V1.48
2650 Mainlog lines which have GMT offsets and are too short to
2651 have a flag are now skipped.
2653 SC/07 Eximstats V1.49 (Alain Williams)
2654 Added the -emptyok flag.
2656 SC/08 Eximstats V1.50
2657 Fixes for obtaining the IP address from reject messages.
2659 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
2660 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
2661 whitespace changes from 4.64-PH/27
2663 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
2666 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
2667 are found, allow negative numbers in numeric criteria)
2669 JJ/06 exipick.20061117.2, added new $message_body_missing variable
2671 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
2672 to match changes made in 4.64-PH/43
2674 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
2676 PH/47 Put in an explicit test for a DNS lookup of an address record where the
2677 "domain" is actually an IP address, and force a failure. This locks out
2678 those revolvers/nameservers that support "A-for-A" lookups, in
2679 contravention of the specifications.
2681 PH/48 When a host name was looked up from an IP address, and the subsequent
2682 forward lookup of the name timed out, the host name was left in
2683 $sender_host_name, contrary to the specification.
2685 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
2686 restricted to single-key lookups, Exim was not diagnosing an error if
2687 * or *@ was used with a query-style lookup.
2689 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
2691 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
2692 long ago, but noone interested enough thought of it. Let's just say that
2693 the "1.1" means that there are some new functions that weren't there at
2694 some point in the past.
2696 PH/51 Error processing for expansion failure of helo_data from an smtp
2697 transport during callout processing was broken.
2699 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
2700 tested/used via the -bh/-bhc/-bs options.
2702 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
2703 bug, fixed in subsequent PCRE releases).
2705 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
2706 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
2708 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2714 SC/01 Use a glob alias rather than an array ref in eximstats generated
2715 parser. This improves both readability and performance.
2717 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2718 Don't display local sender or destination tables in eximstats unless
2719 there is data to show.
2720 Added average volumes into the eximstats top table text output.
2722 SC/03 Collect data on the number of addresses (recipients) as well
2723 as the number of messages in eximstats.
2725 TF/01 Correct an error in the documentation for the redirect router. Exim
2726 does (usually) call initgroups() when daemonizing.
2728 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2729 with consistent privilege compared to when running as a daemon.
2731 TF/03 Note in the spec that $authenticated_id is not set for local
2732 submissions from trusted users.
2734 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2735 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2737 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2738 by adding some example configuration directives to the default
2739 configuration file. A little bit of work is required to uncomment the
2740 directives and define how usernames and passwords are checked, but
2741 there is now a framework to start from.
2743 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2744 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2745 without this. I don't know how relevant this is to other LDAP libraries.
2747 PH/02 Add the verb name to the "unknown ACL verb" error.
2749 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2751 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2753 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2754 directory not expanded when it should be if an expanded home directory
2755 was set for the address (which is overridden by the transport).
2757 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2760 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2761 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2762 because it is too late at that time, and has no effect.
2764 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2765 security issue with \' (bugzilla #107). I could not use the
2766 PQescapeStringConn() function, because it needs a PGconn value as one of
2769 PH/08 When testing addresses using -bt, indicate those final addresses that
2770 are duplicates that would not cause an additional delivery. At least one
2771 person was confused, thinking that -bt output corresponded to deliveries.
2772 (Suppressing duplicates isn't a good idea as you lose the information
2773 about possibly different redirections that led to the duplicates.)
2775 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2776 systems where poll() doesn't work, in particular OS X.
2778 PH/10 Added more information to debugging output for retry time not reached.
2780 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2781 operations in malware.c.
2783 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2786 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2787 syslog_duplication set false, log lines that would normally be written
2788 both the the main log and to the reject log were not written to syslog at
2791 PH/14 In the default configuration, change the use of "message" in ACL warn
2792 statements to "add_header".
2794 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2795 not followed by a command (e.g. "seen endif").
2797 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2798 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2801 PH/17 Added extra conditions to the default value of delay_warning_condition
2805 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2806 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2807 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2810 The Auto-Submitted: and various List- headers are standardised, whereas I
2811 don't think Precedence: ever was.
2813 PH/18 Refactored debugging code in route_finduser() to show more information,
2814 in particular, the error code if getpwnam() issues one.
2816 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2817 This is apparently needed in addition to the PH/07 change above to avoid
2818 any possible encoding problems.
2820 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2821 but not after initializing Perl.
2823 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2824 output them only if debugging. By default they are written stderr,
2825 apparently, which is not desirable.
2827 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2830 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2833 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2835 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2836 authenticated or an ident call has been made. Suppress the default
2837 values for $authenticated_id and $authenticated_sender (but permit -oMai
2838 and -oMas) when testing with -bh.
2840 PH/24 Re-jigged the order of the tests in the default configuration so that the
2841 tests for valid domains and recipients precede the DNS black list and CSA
2842 tests, on the grounds that those ones are more expensive.
2844 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2845 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2846 This bug exists in every version of Exim that I still have, right back to
2849 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2850 However, an attempt to turn on case-sensitivity in a regex key by
2851 including (?-i) didn't work because the subject string was already
2852 lowercased, and the effects were non-intuitive. It turns out that a
2853 one-line patch can be used to allow (?-i) to work as expected.
2859 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2860 other effects) broke the use of negated acl sub-conditions.
2862 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2865 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2866 "Deny" causes Exim to reject the incoming connection with a 554 error.
2867 Unfortunately, if there is a major crisis, such as a disk failure,
2868 tcp-wrappers gives "deny", whereas what one would like would be some
2869 kind of temporary error. A kludge has been added to help with this.
2870 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2871 554 error is used if errno is still zero or contains ENOENT (which occurs
2872 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2875 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2877 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2878 errors. Otherwise a message that provokes a temporary error (when other
2879 messages do not) can cause a whole host to time out.
2881 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2882 addresses were routed directly to files or pipes from a redirect router.
2883 File deliveries just didn't batch; pipe deliveries might have suffered
2886 PH/06 A failure to get a lock for a hints database would erroneously always say
2887 "Failed to get write lock", even when it was really a read lock.
2889 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2890 of 0600. This has been changed to use the value of the lockfile_mode
2891 option (which defaults to 0600).
2893 PH/08 Applied small patch from the Sieve maintainer.
2895 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2896 folder from quota calculations, a direct delivery into this folder messed
2897 up the contents of the maildirsize file. This was because the regex was
2898 used only to exclude .Trash (or whatever) when the size of the mailbox
2899 was calculated. There was no check that a delivery was happening into an
2900 excluded directory. This bug has been fixed by ignoring all quota
2901 processing for deliveries into excluded directories.
2903 PH/10 Added the maildirfolder_create_regex option to appendfile.
2909 PH/01 The code for finding all the local interface addresses on a FreeBSD
2910 system running IPv6 was broken. This may well have applied to all BSD
2911 systems, as well as to others that have similar system calls. The broken
2912 code found IPv4 interfaces correctly, but gave incorrect values for the
2913 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2914 that it would not match correctly against @[] and not recognize the IPv6
2917 PH/02 The ipliteral router was not recognizing addresses of the form user@
2918 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2920 PH/03 Added disable_ipv6.
2922 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2923 decoded form, because it is most often used to construct To: headers
2924 lines in autoreplies, and the decoded form may well be syntactically
2925 invalid. However, $reply_address has leading white space removed, and all
2926 newlines turned into spaces so that the autoreply transport does not
2929 PH/05 If group was specified without a user on a router, and no group or user
2930 was specified on a transport, the group from the router was ignored.
2932 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2933 for visible compile-time settings that can be used to change these
2934 numbers, for those that want even more. Backwards compatibility with old
2935 spool files has been maintained. However, going back to a previous Exim
2936 release will lost any variables that are in spool files.
2938 PH/07 Two small changes when running in the test harness: increase delay when
2939 passing a TCP/IP connection to a new process, in case the original
2940 process has to generate a bounce, and remove special handling of
2941 127.0.0.2 (sic), which is no longer necessary.
2943 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2944 be the same on different OS.
2946 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2949 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2950 whether --show-vars was specified or not
2952 JJ/02 exipick: Added support for new ACL variable spool format introduced
2955 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2956 syntactically invalid From: or Reply-to: line, and a filter used this to
2957 generate an autoreply, and therefore failed to obtain an address for the
2958 autoreply, Exim could try to deliver to a non-existent relative file
2959 name, causing unrelated and misleading errors. What now happens is that
2960 it logs this as a hard delivery error, but does not attempt to create a
2963 PH/11 The exinext utility has a -C option for testing purposes, but although
2964 the given file was scanned by exinext itself; it wasn't being passed on
2965 when Exim was called.
2967 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2968 an end-of-file indication when reading a command response.
2970 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2971 compiled. In many other places in Exim, IPv6 addresses are always
2972 recognized, so I have changed this. It also means that IPv4 domain
2973 literals of the form [IPV4:n.n.n.n] are now always recognized.
2975 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2976 used if the router is not running as root, for example, when verifying at
2977 ACL time, or when using -bh. The debugging output from this situation was
2978 non-existent - all you got was a failure to exec. I have made two
2981 (a) Failures to set uid/gid, the current directory, or a process leader
2982 in a subprocess such as that created by queryprogram now generate
2983 suitable debugging output when -d is set.
2985 (b) The queryprogram router detects when it is not running as root,
2986 outputs suitable debugging information if -d is set, and then runs
2987 the subprocess without attempting to change uid/gid.
2989 PH/15 Minor change to Makefile for building test_host (undocumented testing
2992 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2993 additional section of a DNS packet that returns MX or SRV records.
2994 Instead, it always explicitly searches for A/AAAA records. This avoids
2995 major problems that occur when a DNS server includes only records of one
2996 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2997 fixed another bug: if SRV records were looked up and the corresponding
2998 address records were *not* found in the additional section, the port
2999 values from the SRV records were lost.
3001 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3002 using the correct key (the original address) when searching the retry
3003 rules in order to find which one to use for generating the retry hint.
3005 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3006 adding the default one. Similarly, if it contains a Reply-To: header, the
3007 errors_reply_to option, if set, is not used.
3009 PH/19 When calculating a retry time, Exim used to measure the "time since
3010 failure" by looking at the "first failed" field in the retry record. Now
3011 it does not use this if it is later than than the arrival time of the
3012 message. Instead it uses the arrival time. This makes for better
3013 behaviour in cases where some deliveries succeed, thus re-setting the
3014 "first failed" field. An example is a quota failure for a huge message
3015 when small messages continue to be delivered. Without this change, the
3016 "time since failure" will always be short, possible causing more frequent
3017 delivery attempts for the huge message than are intended.
3018 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3020 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3021 $1, $2, $3) because the numerical variables can be reset during some
3022 expansion items (e.g. "match"), thereby losing the authentication data.
3024 PH/21 Make -bV show the size of off_t variables so that the test suite can
3025 decide whether to run tests for quotas > 2G.
3027 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3028 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3029 filecount value is greater than 2G or if a quota value is greater than 2G
3030 on a system where the size of off_t is not greater than 4, a panic error
3033 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3034 never match. The debug and -bh output now contains an explicit error
3035 message indicating a malformed IPv4 address or mask.
3037 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3038 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3039 PH/23 above applies.
3041 PH/25 Do not write to syslog when running in the test harness. The only
3042 occasion when this arises is a failure to open the main or panic logs
3043 (for which there is an explicit test).
3045 PH/26 Added the /no_tell option to "control=freeze".
3047 PH/27 If a host name lookup failed very early in a connection, for example, if
3048 the IP address matched host_lookup and the reverse lookup yielded a name
3049 that did not have a forward lookup, an error message of the form "no IP
3050 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3051 could be logged. Now it outputs the IP address instead of "NULL".
3053 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3054 allows the sender and the authenticated sender to be set when
3055 submitting a message from within Exim. Since child_open_exim() is
3056 documented for local_scan(), the new function should be too.
3058 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3059 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3060 results in an empty string is now treated as unset.
3062 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3064 PH/31 Added sender_verify_fail logging option.
3066 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3067 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3068 tidied the source and removed it altogether.
3070 PH/33 When a queue run was abandoned because the load average was too high, a
3071 log line was always written; now it is written only if the queue_run log
3072 selector is set. In addition, the log line for abandonment now contains
3073 information about the queue run such as the pid. This is always present
3074 in "start" and "stop" lines but was omitted from the "abandon" line.
3076 PH/34 Omit spaces between a header name and the colon in the error message that
3077 is given when verify = headers_syntax fails (if there are lots of them,
3078 the message gets confusing).
3080 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3081 names, as there are now some PTR records that contain slashes. This check
3082 is only to protect against broken name servers that fall over on strange
3083 characters, so the fact that it applies to all lookups doesn't matter.
3085 PH/36 Now that the new test suite is complete, we can remove some of the
3086 special code in Exim that was needed for the old test suite. For example,
3087 sorting DNS records because real resolvers return them in an arbitrary
3088 order. The new test suite's fake resolver always returns records in the
3091 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3092 bounces) except when queue_only is set, to avoid logging races between
3093 the different processes.
3095 PH/38 Panic-die if .include specifies a non-absolute path.
3097 PH/39 A tweak to the "H" retry rule from its user.
3099 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3100 a label. They prevented compilation on older perls.
3102 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3103 a warning to be raised on newish perls.
3105 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3106 on queue. Changes to match documented behaviour of showing count of
3107 messages matching specified criteria.
3109 PH/40 Changed the default ident timeout from 30s to 5s.
3111 PH/41 Added support for the use of login_cap features, on those BSD systems
3112 that have them, for controlling the resources used by pipe deliveries.
3114 PH/42 The content-scanning code uses fopen() to create files in which to put
3115 message data. Previously it was not paying any attention to the mode of
3116 the files. Exim runs with umask(0) because the rest of the code creates
3117 files with open(), and sets the required mode explicitly. Thus, these
3118 files were ending up world-writeable. This was not a big issue, because,
3119 being within the spool directory, they were not world-accessible. I have
3120 created a function called modefopen, which takes an additional mode
3121 argument. It sets umask(777), creates the file, chmods it to the required
3122 mode, then resets the umask. All the relevant calls to fopen() in the
3123 content scanning code have been changed to use this function.
3125 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3126 to 24 hours. This avoids potential overflow problems when processing G
3127 and H retry rules. I suspect nobody ever tinkers with this value.
3129 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3131 PH/45 When the plaintext authenticator is running as a client, the server's
3132 challenges are checked to ensure they are valid base64 strings. By
3133 default, the authentication attempt is cancelled if an invalid string is
3134 received. Setting client_ignore_invalid_base64 true ignores these errors.
3135 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3136 they are received. Thus, the responses can be made to depend on the
3137 challenges. If an invalid string is ignored, an empty string is placed in
3140 PH/46 Messages that are created by the autoreply transport now contains a
3141 References: header, in accordance with RFCs 2822 and 3834.
3143 PH/47 Added authenticated_sender_force to the smtp transport.
3145 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3147 PH/49 Installed latest patch from the Sieve maintainer.
3149 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3150 was also set, the appendfile transport was unnecessarily scanning a
3151 directory of message files (e.g. for maildir delivery) to find the count
3152 of files (along with the size), even though it did not need this
3153 information. It now does the scan only if it needs to find either the
3154 size of the count of files.
3156 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3158 PH/52 Two bugs concerned with error handling when the smtp transport is
3161 (i) Exim was not creating retry information for temporary errors given
3162 for individual recipients after the DATA command when the smtp transport
3163 was used in LMTP mode. This meant that they could be retried too
3164 frequently, and not timed out correctly.
3166 (ii) Exim was setting the flag that allows error details to be returned
3167 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3168 recipients that were returned after the DATA command.
3170 PH/53 This is related to PH/52, but is more general: for any failing address,
3171 when detailed error information was permitted to be returned to the
3172 sender, but the error was temporary, then after the final timeout, only
3173 "retry timeout exceeded" was returned. Now it returns the full error as
3174 well as "retry timeout exceeded".
3176 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3177 do this, and (what is worse) MTAs that accept it.
3179 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3180 will now be deprecated.
3182 PH/56 New os.c-cygwin from the Cygwin maintainer.
3184 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3185 formats (previously only available in exim formats via -bpr, -bpru,
3186 and -bpra. Now also available in native and exiqgrep formats)
3188 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3189 with very large, slow to parse queues
3191 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3193 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3195 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3196 responses to authentication challenges, though it was showing the
3197 challenges; (ii) I've removed the CR characters from the debug output for
3200 PH/58 Allow for the insertion of a newline as well as a space when a string
3201 is turned into more than one encoded-word during RFC 2047 encoding. The
3202 Sieve code now uses this.
3204 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3205 data_4xx, lost_connection, tls_required.
3207 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3208 message was being sent as an SMTP response.
3210 PH/61 Add -l and -k options to exicyclog.
3212 PH/62 When verifying, if an address was redirected to one new address, so that
3213 verification continued, and the new address failed or deferred after
3214 having set something in $address_data, the value of $address_data was not
3215 passed back to the ACL. This was different to the case when no
3216 redirection occurred. The value is now passed back in both cases.
3218 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3219 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3220 use login_cap.h, so on its own it isn't the distinguishing feature. The
3221 new name refers directly to the setclassresources() function.
3223 PH/65 Added configuration files for NetBSD3.
3225 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3227 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3228 is preferred over IPv4.
3230 PH/68 The bounce_return_message and bounce_return_body options were not being
3231 honoured for bounces generated during the reception of non-SMTP messages.
3232 In particular, this applied to messages rejected by the ACL. This bug has
3233 been fixed. However, if bounce_return_message is true and bounce_return_
3234 body is false, the headers that are returned for a non-SMTP message
3235 include only those that have been read before the error was detected.
3236 (In the case of an ACL rejection, they have all been read.)
3238 PH/69 The HTML version of the specification is now built in a directory called
3239 spec_html instead of spec.html, because the latter looks like a path with
3240 a MIME-type, and this confuses some software.
3242 PH/70 Catch two compiler warnings in sieve.c.
3244 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3245 function verify_get_ident() calls ip_connect() to connect a socket, but
3246 if the "connect()" function timed out, ip_connect() used to close the
3247 socket. However, verify_get_ident() also closes the socket later, and in
3248 between Exim writes to the log, which may get opened at this point. When
3249 the socket was closed in ip_connect(), the log could get the same file
3250 descriptor number as the socket. This naturally causes chaos. The fix is
3251 not to close the socket in ip_connect(); the socket should be closed by
3252 the function that creates it. There was only one place in the code where
3253 this was missing, in the iplookup router, which I don't think anybody now
3254 uses, but I've fixed it anyway.
3256 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3257 well as to direct DNS lookups. Otherwise the handling of names in host
3258 lists is inconsistent and therefore confusing.
3264 PH/01 Two changes to the default runtime configuration:
3266 (1) Move the checks for relay_from_hosts and authenticated clients from
3267 after to before the (commented out) DNS black list checks.
3269 (2) Add control=submission to the relay_from_hosts and authenticated
3270 clients checks, on the grounds that messages accepted by these
3271 statements are most likely to be submissions.
3273 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3275 (1) Generate an error if the third argument for the ${prvs expansion is
3278 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3281 (3) Reset the variables that are obtained from the first argument of
3282 ${prvscheck and used in the second argument before leaving the code,
3283 because their memory is reclaimed, so using them afterwards may do
3286 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3287 one (it's much easier than Tom thought :-).
3289 (5) Because of (4), we can now allow for the use of $prvscheck_result
3290 inside the third argument.
3292 PH/03 For some reason, the default setting of PATH when running a command from
3293 a pipe transport was just "/usr/bin". I have changed it to
3296 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3297 anything to be listed in the output from -bV.
3299 PH/05 When a filter generated an autoreply, the entire To: header line was
3300 quoted in the delivery log line, like this:
3302 => >A.N.Other <ano@some.domain> <original@ddress> ...
3304 This has been changed so that it extracts the operative address. There
3305 may be more than one such address. If so, they are comma-separated, like
3308 => >ano@some.domain,ona@other.domain <original@ddress> ...
3310 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3311 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3312 not being looked up in the rDNS to get a host name, Exim was showing the
3313 IP address twice in Received: lines, even though the IP addresses were
3314 identical. For example:
3316 Received: from [1.2.3.4] (helo=[1.2.3.4])
3318 However, if the real host name was known, it was omitting the HELO data
3319 if it matched the actual IP address. This has been tidied up so that it
3320 doesn't show the same IP address twice.
3322 PH/07 When both +timestamp and +memory debugging was on, the value given by
3323 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3324 called by the debug printing, thereby overwriting the timestamp buffer.
3325 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3327 PH/08 When the original message was included in an autoreply transport, it
3328 always said "this is a copy of the message, including all the headers",
3329 even if body_only or headers_only was set. It now gives an appropriate
3332 PH/09 Applied a patch from the Sieve maintainer which:
3334 o fixes some comments
3335 o adds the (disabled) notify extension core
3336 o adds some debug output for the result of if/elsif tests
3337 o points to the current vacation draft in the documentation
3338 and documents the missing references header update
3342 o fixes a bug in processing the envelope test (when testing
3343 multiple envelope elements, the last element determined the
3346 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3347 Electronic Mail") by including:
3349 Auto-submitted: auto-generated
3351 in the messages that it generates (bounce messages and others, such as
3352 warnings). In the case of bounce messages for non-SMTP messages, there was
3353 also a typo: it was using "Auto_submitted" (underscore instead of
3354 hyphen). Since every message generated by Exim is necessarily in response
3355 to another message, thes have all been changed to:
3357 Auto-Submitted: auto-replied
3359 in accordance with these statements in the RFC:
3361 The auto-replied keyword:
3363 - SHOULD be used on messages sent in direct response to another
3364 message by an automatic process,
3366 - MUST NOT be used on manually-generated messages,
3368 - MAY be used on Delivery Status Notifications (DSNs) and Message
3369 Disposition Notifications (MDNs),
3371 - MUST NOT be used on messages generated by automatic or periodic
3372 processes, except for messages which are automatic responses to
3375 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3376 to the default Received: header definition.
3378 PH/12 Added log selector acl_warn_skipped (default on).
3380 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3381 variables because (a) they are in the wrong storage pool and (b) even if
3382 they were copied, it wouldn't work properly because of the caching.
3384 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3385 checking when decoding. Apparently there are clients that generate
3386 overlong encoded strings. Why am I not surprised?
3388 PH/15 If the first argument of "${if match_address" was not empty, but did not
3389 contain an "@" character, Exim crashed. Now it writes a panic log message
3390 and treats the condition as false.
3392 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3394 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3395 extension "envelope-auth". The code is finished and in agreement with
3396 other implementations, but there is no documentation so far and in fact,
3397 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3398 not changing the active code.
3400 Print executed "if" and "elsif" statements when debugging is used. This
3401 helps a great deal to understand what a filter does.
3403 Document more things not specified clearly in RFC3028. I had all this
3404 sorted out, when out of a sudden new issues came to my mind. Oops."
3406 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3409 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3410 canonical form (as documented). However, after a host name lookup from
3411 the IP address, check_host() was doing a simple string comparison with
3412 addresses acquired from the DNS when checking that the found name did
3413 have the original IP as one of its addresses. Since any found IPv6
3414 addresses are likely to be in abbreviated form, the comparison could
3415 fail. Luckily, there already exists a function for doing the comparison
3416 by converting both addresses to binary, so now that is used instead of
3417 the text comparison.
3419 PH/20 There was another similar case to PH/19, when a complete host name was
3420 given in a host list; looking up its IP address could give an abbreviated
3421 form, whereas the current host's name might or might not be abbreviated.
3422 The same fix has been applied.
3428 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3429 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3432 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3433 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3435 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3437 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3438 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3439 Also, for "Auto-Submitted", treat anything other than "no" as
3440 non-personal, in accordance with RFC 3834. (Previously it treated
3441 anything starting "auto-" as non-personal.)
3443 TF/01 The control=submission/name=... option had a problem with syntax
3444 errors if the name included a slash character. The /name= option
3445 now slurps the rest of the string, so it can include any characters
3446 but it must come last in the list of options (after /sender_retain
3449 PH/05 Some modifications to the interface to the fake nameserver for the new
3457 TK/01 Added the "success_on_redirect" address verification option. See
3458 NewStuff for rationale and an example.
3460 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3462 PH/02 Patch to exigrep to allow it to work on syslog lines.
3464 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3465 fread() to skip over the body file's header line, because in Cygwin the
3466 header line is locked and is inaccessible.
3468 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3469 co-exist for some time) to make it clear that it is the Exim ID that is
3470 referenced, not the Message-ID: header line.
3472 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3473 string_format() function, because snprintf() does not exist on all
3476 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3477 ${stat: expansion item.
3479 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3480 protocol synchronization error", to keep the pedants happy.
3482 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3483 well as for IRIX systems, when gcc is being used. See the host.c source
3486 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3488 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3491 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3492 transport and to the smtp transport in LMTP mode.
3494 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3496 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3497 run a filter in a subprocess. This could lead to confusion in subsequent
3498 lookups in the parent process. There should also be a search_tidyup() at
3499 the end of the subprocess.
3501 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3502 only if the host matched helo_try_verify_hosts, which caused the
3503 verification to occur when the EHLO/HELO command was issued. The ACL just
3504 tested the remembered result. Now, if a previous verification attempt has
3505 not happened, "verify = helo" does it there and then.
3507 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3509 TK/03 Fix log output including CR from clamd.
3511 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3512 exist provoked a memory error which could cause a segfault.
3514 PH/15 Installed PCRE 6.2
3516 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3518 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3519 of the problem. Specifically, suggested +O2 rather than +O1 for the
3522 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3524 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3525 record, the port was not correctly logged when the outgoing_port log
3526 selector was set (it logged the transort's default port).
3528 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3529 fallback_hosts, and "hosts" in the smtp transport.
3531 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3532 host errors such as "Connection refused".
3534 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3535 authentication with radiusclient 0.4.9:
3537 - Error returned from rc_read_config was caught wrongly
3538 - Username/password not passed on to radius server due to wrong length.
3540 The presumption is that some radiusclient API changes for 4.51/PH/17
3541 were not taken care of correctly. The code is still untested by me (my
3542 Linux distribution still has 0.3.2 of radiusclient), but it was
3543 contributed by a Radius user.
3545 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3546 expanding the "port" option of the smtp transport.
3548 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3549 while reading a MIME header. Thanks to Tom Hughes for a patch.
3551 PH/24 Include config.h inside local_scan.h so that configuration settings are
3554 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3555 that in an ACL for RCPT (for example), you can examine exactly what was
3558 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3559 commands, but it was not correctly comparing the address with the actual
3560 client host address. Thus, it would show the EHLO address in Received:
3561 header lines when this was not necessary.
3563 PH/27 Added the % operator to ${eval:}.
3565 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3566 it should be ignoring failures (because with -C, for example, it has lost
3567 privilege). It wasn't ignoring creation failures other than "already
3570 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3573 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3574 because an input line was too long, either on its own, or by virtue of
3575 too many continuations, the temporary file was not being removed, and the
3576 return code was incorrect.
3578 PH/31 Missing "BOOL" in function definition in filtertest.c.
3580 PH/32 Applied Sieve patches from the maintainer.
3582 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3584 PH/33 Added "verify = not_blind".
3586 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3587 Local/Makefile (with some defaults set). These are used in built scripts
3588 such as exicyclog, but they have never been used in the exim_install
3589 script (though there are many overriding facilities there). I have
3590 arranged that the exim_install script now takes note of these two
3593 PH/35 Installed configuration files for Dragonfly.
3595 PH/36 When a locally submitted message by a trusted user did not contain a
3596 From: header, and the sender address was obtained from -f or from an SMTP
3597 MAIL command, and the trusted user did not use -F to supply a sender
3598 name, $originator_name was incorrectly used when constructing a From:
3599 header. Furthermore, $originator_name was used for submission mode
3600 messages from external hosts without From: headers in a similar way,
3601 which is clearly wrong.
3603 PH/37 Added control=suppress_local_fixups.
3605 PH/38 When log_selector = +received_sender was set, and the addition of the
3606 sender made the log line's construction buffer exactly full, or one byte
3607 less than full, an overflow happened when the terminating "\n" was
3610 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3611 when the result of a list match is failure because a DNS lookup failed.
3613 PH/40 RM_COMMAND is now used in the building process.
3615 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3616 the "build-* directories that it finds.
3618 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3619 address in a domain literal was a prefix of an interface address.
3621 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3622 when verifying a sender address, unless rewrite_headers is false.
3624 PH/44 Wrote a long comment about why errors_to addresses are verified as
3625 recipients, not senders.
3627 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3628 the ratelimit ACL was added.
3630 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3632 PH/46 Added extra information about PostgreSQL errors to the error string.
3634 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3635 avoiding the need to install special zones in a real server. This is
3636 backwards compatible; if it can't find the fake resolver, it drops back.
3637 Thus, both old and new test suites can be run.
3639 TF/02 Added util/ratelimit.pl
3641 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
3642 clock is set back in time.
3644 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
3645 Candler <B.Candler@pobox.com>.
3647 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
3648 OK for addresses that are the result of redirections.
3650 PH/48 A number of further additions for the benefit of the new test suite,
3651 including a fake gethostbyname() that interfaces to the fake DNS resolver
3654 TF/06 The fix for widen_domains has also been applied to qualify_single and
3655 search_parents which are the other dnslookup options that can cause
3658 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
3661 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
3663 TF/07 Exim produced the error message "an SRV record indicated no SMTP
3664 service" if it encountered an MX record with an empty target hostname.
3665 The message is now "an MX or SRV record indicated no SMTP service".
3667 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
3668 if the DNS of the sending site is misconfigured. This is quite a
3669 common situation. This change restores the behaviour of treating a
3670 helo verification defer as a failure.
3672 PH/51 If self=fail was set on a router, the bounce message did not include the
3673 actual error message.
3679 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
3681 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
3682 command itself ended in error, the underlying message about the transport
3683 filter timeout was being overwritten with the pipe command error. Now the
3684 underlying error message should be appended to the second error message.
3686 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
3688 PH/02 Reduce the amount of output that "make" produces by default. Full output
3689 can still be requested.
3691 PH/03 The warning log line about a condition test deferring for a "warn" verb
3692 was being output only once per connection, rather than after each
3693 occurrence (because it was using the same function as for successful
3694 "warn" verbs). This seems wrong, so I have changed it.
3696 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
3697 it should not have, which might have caused a crash in the right
3698 circumstances, but probably never did.
3700 PH/04 Installed a modified version of Tony Finch's patch to make submission
3701 mode fix the return path as well as the Sender: header line, and to
3702 add a /name= option so that you can make the user's friendly name appear
3705 TF/03 Added the control = fakedefer ACL modifier.
3707 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
3708 Mark Lowes for thorough testing.
3710 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
3712 TK/03 Merged latest SRS patch from Miles Wilton.
3714 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3715 with the definition in sysexits.h (which is #included earlier).
3716 Fortunately, Exim does not actually use EX_OK. The code used to try to
3717 preserve the sysexits.h value, by assuming that macro definitions were
3718 scanned for macro replacements. I have been disabused of this notion,
3719 so now the code just undefines EX_OK before #including unistd.h.
3721 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3722 in the smtp transport. When a block could not be written in a single
3723 write() function, the timeout was being re-applied to each part-write.
3724 This seems wrong - if the receiver was accepting one byte at a time it
3725 would take for ever. The timeout is now adjusted when this happens. It
3726 doesn't have to be particularly precise.
3728 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3729 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3731 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3732 without a domain if the check to <postmaster@domain> fails.
3734 SC/01 Eximstats: added -xls and the ability to specify output files
3735 (patch written by Frank Heydlauf).
3737 SC/02 Eximstats: use FileHandles for outputting results.
3739 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3741 SC/04 Eximstats: fixed display of large numbers with -nvr option
3743 SC/05 Eximstats: fixed merging of reports with empty tables.
3745 SC/06 Eximstats: added the -include_original_destination flag
3747 SC/07 Eximstats: removed tabs and trailing whitespace.
3749 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3751 TK/06 MBOX spool code: Add real "From " MBOX separator line
3752 so the .eml file is really in mbox format (even though
3753 most programs do not really care). Patch from Alex Miller.
3755 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3756 The latter is generated from $received_to and is only set if the
3757 message has one envelope recipient. SA can use these headers,
3758 obviously out-of-the-box. Patch from Alex Miller.
3760 PH/08 The ${def test on a variable was returning false if the variable's
3761 value was "0", contrary to what the specification has always said!
3762 The result should be true unless the variable is empty.
3764 PH/09 The syntax error of a character other than { following "${if
3765 def:variable_name" (after optional whitespace) was not being diagnosed.
3766 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3767 accidental colon was present, for example, could give incorrect results.
3769 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3770 result is used (not including appendfile, where other changes are about
3773 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3774 This involved changing a lot of size variables from int to off_t. It
3775 should work with maildirs and everything.
3777 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3778 spamd dying while we are connected to it.
3780 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3783 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3784 function for BDB 4.3.
3786 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3788 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3789 the sources for PCRE have been re-arranged and more files are now
3792 PH/15 The code I had for printing potentially long long variables in PH/11
3793 above was not the best (it lost precision). The length of off_t variables
3794 is now inspected at build time, and an appropriate printing format (%ld
3795 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3796 to be "long long int" or "long int". This is needed for the internal
3797 formatting function string_vformat().
3799 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3800 the configuration file to be ":syslog", then the script "guesses" where
3801 the logs files are, rather than using the compiled in default. In our
3802 case the guess is not the same as the compiled default, so the script
3803 suddenly stopped working when I started to use syslog. The patch checks
3804 to see if log_file_path is "". If so, it attempts to read it from exim
3805 with no configuration file to get the compiled in version, before it
3806 falls back to the previous guessing code."
3808 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3809 implementing BATV in an Exim configuration. See NewStuff for the gory
3812 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3813 Makefile that are specific to HP-UX.
3815 PH/18 If the "use_postmaster" option was set for a recipient callout together
3816 with the "random" option, the postmaster address was used as the MAIL
3817 FROM address for the random test, but not for the subsequent recipient
3818 test. It is now used for both.
3820 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3821 patch removes a few documentation additions to RFC 3028, because the
3822 latest draft now contains them. It adds the new en;ascii-case comparator
3823 and a new error check for 8bit text in MIME parts. Comparator and
3824 require names are now matched exactly. I enabled the subaddress
3825 extension, but it is not well tested yet (read: it works for me)."
3827 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3828 rework some of the code of TK/09 above to avoid the hardwired use of
3829 "%lld" and "long long". Replaced the call to snprintf() with a call to
3832 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3833 records point to non-existent hosts", "retry timeout exceeded", and
3834 "retry time not reached for any host after a long failure period".
3836 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3837 experimental DomainKeys support:
3839 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3840 (2) On an error such as an illegally used "control", the wrong name for
3841 the control was given.
3843 These problems did NOT occur unless DomainKeys support was compiled.
3845 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3847 PH/24 Added ${if match_ip condition.
3849 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3850 databases so that it will be absolutely obvious if a crash occurs in the
3851 DB library. This is a regular occurrence (often caused by mis-matched
3854 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3855 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3856 picked up on a user's system that detects such things. There doesn't seem
3857 to be a gcc warning option for this - only an attribute that has to be
3858 put on the function's prototype. It seems that in Fedora Core 4 they have
3859 set this on a number of new functions. No doubt there will be more in due
3862 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3863 specify a transport. However, if an address that was verified by such a
3864 router was the subject of a callout, Exim crashed because it tried to
3865 read the rcpt_include_affixes from the non-existent transport. Now it
3866 just assumes that the setting of that option is false. This bug was
3867 introduced by 4.51/PH/31.
3869 PH/28 Changed -d+all to exclude +memory, because that information is very
3870 rarely of interest, but it makes the output a lot bigger. People tend to
3871 do -d+all out of habit.
3873 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3874 code in os-type was giving problems when libc.so lives in lib64, like on
3877 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3878 aren't the modern standard, and it seems that some systems' include files
3879 don't always have them. Exim was already checking for some of the newer
3880 ones like T_AAAA, and defining it itself. I've added checks for all the
3881 record types that Exim uses.
3883 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3884 not automatically generating a new one, as it is supposed to. This
3885 prevented TLS from working. If the file did exist, but contained invalid
3886 data, a new version was generated, as expected. It was only the case of a
3887 non-existent file that was broken.
3889 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3890 with a change in libdomainkeys > 0.64.
3892 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3893 from DNS. If the selector record carries the flag, it now has
3894 precedence over the domain-wide flag.
3896 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3898 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3899 the use of a port name that isn't defined in /etc/services) occurred, the
3900 message was deferred as in a normal delivery, and thus remained on the
3901 spool, instead of being failed because of the mua_wrapper setting. This
3902 is now fixed, and I tidied up some of the mua_wrapper messages at the
3905 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3906 the messages in a hash of arrays rather than using individual hashes.
3907 This is a bit cleaner and results in dramatic memory savings, albeit
3908 at a slight CPU cost.
3910 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3911 as requested by Marc Sherman.
3913 SC/10 Eximstats: added histograms for user specified patterns as requested
3916 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3918 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3919 fopen() in the content-scanning modules that did not already have it.
3925 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3926 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3928 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3930 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3932 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3933 to test Sieve filters that use "vacation".
3935 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3936 that changes the way the GnuTLS parameters are stored in the cache file.
3937 The new format can be generated externally. For backward compatibility,
3938 if the data in the cache doesn't make sense, Exim assumes it has read an
3939 old-format file, and it generates new data and writes a new file. This
3940 means that you can't go back to an older release without removing the
3943 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3944 work if there are any delivery delays because "one_time" forces the
3945 parent to be marked "delivered", so its unseen clone is never tried
3946 again. For this reason, Exim now forbids the simultaneous setting of
3949 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3950 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3951 entry if you want to know the details. The fix, however, neglected to
3952 consider the case when local delivery batching is involved. The test for
3953 "previously delivered" was not happening when checking to see if an
3954 address could be batched with a previous (undelivered) one; under
3955 certain circumstances this could lead to multiple deliveries to the same
3958 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3959 in its include files, and this causes problems building Exim.
3961 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3962 header_syntax) but Exim was just ignoring anything given after a slash.
3963 In particular, this caused confusion with an attempt to use "verify =
3964 reverse_host_lookup/defer_ok". An error is now given when options are
3965 supplied for verify items that do not have them. (Maybe reverse_host_
3966 lookup should have a defer_ok option, but that's a different point.)
3968 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3969 defined by RFC 821) to 2048, because there were problems with some AUTH
3970 commands, and RFC 1869 says the size should be increased for extended
3971 SMTP commands that take arguments.
3973 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3976 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3977 "unknown" error; now it says that the functionality isn't in the binary.
3979 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3980 an address' error message when a string expansion fails (syntax or
3981 whatever). Otherwise the password may appear in the log. Following change
3982 PH/42 below, there is no longer a chance of it appearing in a bounce
3985 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3987 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3988 of its addresses was ever tried. (Bugzilla bug #2.)
3990 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3991 the result incorrectly in the debug output. (It correctly added a newline
3992 to what was transported.)
3994 TF/01 Added $received_time.
3996 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3997 commented out examples of how to interface to a virus scanner and to
3998 SpamAssassin. Also added commented examples of av_scanner and
3999 spamd_address settings.
4001 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4002 and controls are allowed in which ACLs. There were a couple of minor
4003 errors. Some of the entries in the conditions table (which is a table of
4004 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4005 negation of where the condition IS allowed.
4007 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4009 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4010 header file does not have a version number, so I've had to invent a new
4011 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4012 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4013 radiusclient), but it was contributed by a Radius user.
4015 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4016 files or directories, for OpenSSL.
4018 PH/19 When an Exim process that is running as root has to create an Exim log
4019 file, it does so in a subprocess that runs as exim:exim so as to get the
4020 ownership right at creation (otherwise, other Exim processes might see
4021 the file with the wrong ownership). There was no test for failure of this
4022 fork() call, which would lead to the process getting stuck as it waited
4023 for a non-existent subprocess. Forks do occasionally fail when resources
4024 run out. I reviewed all the other calls to fork(); they all seem to check
4027 PH/20 When checking for unexpected SMTP input at connect time (before writing
4028 the banner), Exim was not dealing correctly with a non-positive return
4029 from the read() function. If the client had disconnected by this time,
4030 the result was a log entry for a synchronization error with an empty
4031 string after "input=" when read() returned zero. If read() returned -1
4032 (an event I could not check), uninitialized data bytes were printed.
4033 There were reports of junk text (parts of files, etc) appearing after
4036 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4038 PH/22 Added support for macro redefinition, and (re)definition in between
4039 driver and ACL definitions.
4041 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4042 forgetting to use the resulting value; it was using the unexpanded value.
4044 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4045 hadn't been configured. The fix is from Juergen Kreileder, who
4046 understands it better than I do:
4048 "Here's what I see happening with three configured cyrus_sasl
4049 authenticators configured (plain, login, cram-md5):
4051 On startup auth_cyrus_sasl_init() gets called for each of these.
4052 This means three calls to sasl_listmech() without a specified mech_list.
4053 => SASL tests which mechs of all available mechs actually work
4054 => three warnings about OTP not working
4055 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4057 With the patch, sasl_listmech() also gets called three times. But now
4058 SASL's mech_list option is set to the server_mech specified in the the
4059 authenticator. Or in other words, the answer from sasl_listmech()
4060 gets limited to just the mech you're testing for (which is different
4062 => the return list contains just 'plain' or 'login', 'cram-md5' or
4063 nothing depending on the value of ob->server_mech.
4065 I've just tested the patch: Authentication still works fine,
4066 unavailable mechs specified in the exim configuration are still
4067 caught, and the auth.log warnings about OTP are gone."
4069 PH/25 When debugging is enabled, the contents of the command line are added
4070 to the debugging output, even when log_selector=+arguments is not
4073 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4074 answer is "GNU", and only if the return is "GNU/something" is the answer
4077 PH/27 $acl_verify_message is now set immediately after the failure of a
4078 verification in an ACL, and so is available in subsequent modifiers. In
4079 particular, the message can be preserved by coding like this:
4081 warn !verify = sender
4082 set acl_m0 = $acl_verify_message
4084 Previously, $acl_verify_message was set only while expanding "message"
4085 and "log_message" when a very denied access.
4087 PH/28 Modified OS/os.c-Linux with
4089 -#ifndef OS_LOAD_AVERAGE
4090 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4092 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4093 nomenclature these days.)
4095 PH/29 Installed patch from the Sieve maintainer that adds the options
4096 sieve_useraddress and sieve_subaddress to the redirect router.
4098 PH/30 In these circumstances:
4099 . Two addresses routed to the same list of hosts;
4100 . First host does not offer TLS;
4101 . First host accepts first address;
4102 . First host gives temporary error to second address;
4103 . Second host offers TLS and a TLS session is established;
4104 . Second host accepts second address.
4105 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4106 and peerdn, if requested) that were in fact used only for the second
4109 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4110 attention to any local part prefix or suffix that was matched by the
4111 router that accepted the address. It now behaves in the same way as it
4112 does for delivery: the affixes are removed from the local part unless
4113 rcpt_include_affixes is set on the transport.
4115 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4116 timeout during the DATA phase of an incoming message.
4118 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4119 applied a patch sanctioned by the Sieve maintainer.
4121 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4122 the uid or gid is negative. A case of a negative gid caused this to be
4123 noticed. The fix allows for either to be negative.
4125 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4126 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4129 PH/36 The change PH/12 above was broken. Fixed it.
4131 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4132 the grounds that routing the same address twice would always produce the
4133 same answer. This might have been true once, but it is certainly no
4134 longer true now. Routing a child address may depend on the previous
4135 routing that produced that child. Some complicated redirection strategies
4136 went wrong when messages had multiple recipients, and made Exim's
4137 behaviour dependent on the order in which the addresses were given.
4139 I have moved the duplicate checking until after the routing is complete.
4140 Exim scans the addresses that are assigned to local and remote
4141 transports, and removes any duplicates. This means that more work will be
4142 done, as duplicates will always all be routed, but duplicates are
4143 presumably rare, so I don't expect this is of any significance.
4145 For deliveries to pipes, files, and autoreplies, the duplicate checking
4146 still happens during the routing process, since they are not going to be
4149 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4150 It corrects a timeout issue with spamd. This is Ian's comment: "The
4151 background is that sometimes spamd either never reads data from a
4152 connection it has accepted, or it never writes response data. The exiscan
4153 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4154 blindly assumes that writes won't block so it may never time out."
4156 PH/39 Allow G after quota size as well as K and M.
4158 PH/40 The value set for $authenticated_id in an authenticator may not contain
4159 binary zeroes or newlines because the value is written to log lines and
4160 to spool files. There was no check on this. Now the value is run through
4161 the string_printing() function so that such characters are converted to
4162 printable escape sequences.
4164 PH/41 $message_linecount is a new variable that contains the total number of
4165 lines in the message. Compare $body_linecount, which is the count for the
4168 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4169 bounce and delay warning messages, except in certain special cases, which
4172 (a) An SMTP error message from a remote host;
4173 (b) A message specified in a :fail: redirection;
4174 (c) A message specified in a "fail" command in a system filter;
4175 (d) A message specified in a FAIL return from the queryprogram router;
4176 (e) A message specified by the cannot_route_message router option.
4178 In these cases only, Exim does include the error details in bounce and
4179 warning messages. There are also a few cases where bland messages such
4180 as "unrouteable address" or "local delivery error" are given.
4182 PH/43 $value is now also set for the "else" part of a ${run expansion.
4184 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4185 being worked on, but at least Exim now implements the latest version to
4188 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4189 process to complete was treated as a delivery failure, a timeout while
4190 writing the message to the pipe was logged, but erroneously treated as a
4191 successful delivery. Such timeouts include transport filter timeouts. For
4192 consistency with the overall process timeout, these timeouts are now
4193 treated as errors, giving rise to delivery failures by default. However,
4194 there is now a new Boolean option for the pipe transport called
4195 timeout_defer, which, if set TRUE, converts the failures into defers for
4196 both kinds of timeout. A transport filter timeout is now identified in
4199 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4200 systems where "make" and "gmake" are different, calling "gmake" at top
4201 level broke things. I've arranged for the value of $(MAKE) to be passed
4202 from the Makefile to this script so that it can call the same version of
4206 A note about Exim versions 4.44 and 4.50
4207 ----------------------------------------
4209 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4210 changes of various kinds. As a consequence, a big documentation update was
4211 needed. This delayed the release for rather longer than seemed good, especially
4212 in the light of a couple of (minor) security issues. Therefore, the changes
4213 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4214 release. So 4.44 and 4.50 are in effect two different branches that both start
4217 I have left the 4.50 change log unchanged; it contains all the changes since
4218 4.43. The change log for 4.44 is below; many of its items are identical to
4219 those for 4.50. This seems to be the most sensible way to preserve the
4220 historical information.
4226 1. Minor wording change to the doc/README.SIEVE file.
4228 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4229 computation of the current number of files was incorrect.
4231 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4232 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4235 4. Give more explanation in the error message when the command for a transport
4236 filter fails to execute.
4238 5. There are several places where Exim runs a non-Exim command in a
4239 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4240 was being done only for the command run by the queryprogram router. It is
4241 now done for all such subprocesses. The other cases are: ${run, transport
4242 filters, and the commands run by the lmtp and pipe transports.
4244 6. Added CONFIGURE_GROUP build-time option.
4246 7. Some older OS have a limit of 256 on the maximum number of file
4247 descriptors. Exim was using setrlimit() to set 1000 as a large value
4248 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4249 systems. I've change it so that if it can't get 1000, it tries for 256.
4251 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4252 was an oversight, and furthermore, ever since the addition of extra
4253 controls (e.g. 4.43/32), the checks on when to allow different forms of
4254 "control" were broken. There should now be diagnostics for all cases when a
4255 control that does not make sense is encountered.
4257 9. Added the /retain_sender option to "control=submission".
4259 10. $recipients is now available in the predata ACL (oversight).
4261 11. Tidy the search cache before the fork to do a delivery from a message
4262 received from the command line. Otherwise the child will trigger a lookup
4263 failure and thereby defer the delivery if it tries to use (for example) a
4264 cached ldap connection that the parent has called unbind on.
4266 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4267 of $address_data from the recipient verification was clobbered by the
4268 sender verification.
4270 13. The value of address_data from a sender verification is now available in
4271 $sender_address_data in subsequent conditions in the ACL statement.
4273 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4275 15. Added a new option "connect=<time>" to callout options, to set a different
4278 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4279 was its contents. (It was OK if the option was not defined at all.)
4281 17. A "Completed" log line is now written for messages that are removed from
4282 the spool by the -Mrm option.
4284 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4285 information about exactly what failed.
4287 19. Added -dd to debug only the daemon process.
4289 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4290 handles timeouts, both on the server side and network timeouts. Renamed the
4291 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4293 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4294 It is now set to "smtps".
4296 22. $host_address is now set to the target address during the checking of
4297 ignore_target_hosts.
4299 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4300 being passed; this would have caused $sender_host_name to have been used if
4301 matching the list had actually called for a host name (not very likely,
4302 since this list is usually IP addresses). A host name is now passed as
4305 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4306 code that specifies a non-restarting handler (typically sigaction() in
4307 modern systems) in an attempt to fix a rare and obscure crash bug.
4309 25. Narrowed the window for a race in the daemon that could cause it to ignore
4310 SIGCHLD signals. This is not a major problem, because they are used only to
4311 wake it up if nothing else does.
4313 26. A malformed maildirsize file could cause Exim to calculate negative values
4314 for the mailbox size or file count. Odd effects could occur as a result.
4315 The maildirsize information is now recalculated if the size or filecount
4318 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4319 support for a long time. Removed HAVE_SYS_VFS_H.
4321 28. Installed the latest version of exipick from John Jetmore.
4323 29. In an address list, if the pattern was not a regular expression, an empty
4324 subject address (from a bounce message) matched only if the pattern was an
4325 empty string. Non-empty patterns were not even tested. This was the wrong
4326 because it is perfectly reasonable to use an empty address as part of a
4327 database query. An empty address is now tested by patterns that are
4328 lookups. However, all the other forms of pattern expect the subject to
4329 contain a local part and a domain, and therefore, for them, an empty
4330 address still always fails if the pattern is not itself empty.
4332 30. Exim went into a mad DNS loop when attempting to do a callout where the
4333 host was specified on an smtp transport, and looking it up yielded more
4334 than one IP address.
4336 31. Re-factored the code for checking spool and log partition space into a
4337 function that finds that data and another that does the check. The former
4338 is then used to implement four new variables: $spool_space, $log_space,
4339 $spool_inodes, and $log_inodes.
4341 32. The RFC2047 encoding function was originally intended for short strings
4342 such as real names; it was not keeping to the 75-character limit for
4343 encoded words that the RFC imposes. It now respects the limit, and
4344 generates multiple encoded words if necessary. To be on the safe side, I
4345 have increased the buffer size for the ${rfc2047: expansion operator from
4348 33. It is now permitted to omit both strings after an "if" condition; if the
4349 condition is true, the result is "true". As before, when the second string
4350 is omitted, a false condition yields an empty string. This makes it less
4351 cumbersome to write custom ACL and router conditions.
4353 34. Failure to deliver a bounce message always caused it to be frozen, even if
4354 there was an errors_to setting on the router. The errors_to setting is now
4357 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4358 canonical form (fully expanded) before being placed in
4359 $sender_host_address.
4361 36. The table in the code that translates DNS record types into text (T_A to
4362 "A" for instance) was missing entries for NS and CNAME. It is just possible
4363 that this could have caused confusion if both these types were looked up
4364 for the same domain, because the text type is used as part of Exim's
4365 per-process caching. But the chance of anyone hitting this buglet seems
4368 37. The dnsdb lookup has been extended in a number of ways.
4370 (1) There is a new type, "zns", which walks up the domain tree until it
4371 finds some nameserver records. It should be used with care.
4373 (2) There is a new type, "mxh", which is like "mx" except that it returns
4374 just the host names, not the priorities.
4376 (3) It is now possible to give a list of domains (or IP addresses) to be
4377 looked up. The behaviour when one of the lookups defers can be
4378 controlled by a keyword.
4380 (4) It is now possible to specify the separator character for use when
4381 multiple records are returned.
4383 38. The dnslists ACL condition has been extended: it is now possible to supply
4384 a list of IP addresses and/or domains to be looked up in a particular DNS
4387 39. Added log_selector=+queue_time_overall.
4389 40. When running the queue in the test harness, wait just a tad after forking a
4390 delivery process, to get repeatability of debugging output.
4392 41. Include certificate and key file names in error message when GnuTLS fails
4393 to set them up, because the GnuTLS error message doesn't include the name
4394 of the failing file when there is a problem reading it.
4396 42. Allow both -bf and -bF in the same test run.
4398 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4400 44. The "Exiscan patch" is now merged into the mainline Exim source.
4402 45. Sometimes the final signoff response after QUIT could fail to get
4403 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4404 < 0 before doing a fflush(). This bug looks as though it goes back to the
4405 introduction of TLS in release 3.20, but "sometimes" must have been rare
4406 because the tests only now provoked it.
4408 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4409 (this can affect the format of dates).
4411 47. exim_tidydb, when checking for the continued existence of a message for
4412 which it has found a message-specific retry record, was not finding
4413 messages that were in split spool directories. Consequently, it was
4414 deleting retry records that should have stayed in existence.
4416 48. Steve fixed some bugs in eximstats.
4418 49. The SPA authentication driver was not abandoning authentication and moving
4419 on to the next authenticator when an expansion was forced to fail,
4420 contradicting the general specification for all authenticators. Instead it
4421 was generating a temporary error. It now behaves as specified.
4423 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4424 (the order specifies the preference for clients). The order is now AES256,
4425 AES128, 3DES, ARCFOUR128.
4427 51. Small patch to Sieve code - explicitly set From: when generating an
4430 52. Exim crashed if a remote delivery caused a very long error message to be
4431 recorded - for instance if somebody sent an entire SpamAssassin report back
4432 as a large number of 550 error lines. This bug was coincidentally fixed by
4433 increasing the size of one of Exim's internal buffers (big_buffer) that
4434 happened as part of the Exiscan merge. However, to be on the safe side, I
4435 have made the code more robust (and fixed the comments that describe what
4438 53. Now that there can be additional text after "Completed" in log lines (if
4439 the queue_time_overall log selector is set), a one-byte patch to exigrep
4440 was needed to allow it to recognize "Completed" as not the last thing in
4443 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4444 patch that reportedly fixes this has been added. I am not expert enough to
4445 create a test for it. This is what the patch creator wrote:
4447 "I found a little strange behaviour of ldap code when working with
4448 Windows 2003 AD Domain, where users was placed in more than one
4449 Organization Units. When I tried to give exim partial DN, the exit code
4450 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4451 But simultaneously result of request was absolutely normal ldap result,
4452 so I produce this patch..."
4454 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4455 REFERENCE, so I have modified the code to exclude the patch when that macro
4458 55. Some experimental protocols are using DNS PTR records for new purposes. The
4459 keys for these records are domain names, not reversed IP addresses. The
4460 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4461 leaves it alone. Component reversal etc. now happens only for IP addresses.
4464 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4466 57. Double the size of the debug message buffer (to 2048) so that more of very
4467 long debug lines gets shown.
4469 58. The exicyclog utility now does better if the number of log files to keep
4470 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4472 59. Two changes related to the smtp_active_hostname option:
4474 (1) $smtp_active_hostname is now available as a variable.
4475 (2) The default for smtp_banner uses $smtp_active_hostname instead
4476 of $primary_hostname.
4478 60. The host_aton() function is supposed to be passed a string that is known
4479 to be a valid IP address. However, in the case of IPv6 addresses, it was
4480 not checking this. This is a hostage to fortune. Exim now panics and dies
4481 if the condition is not met. A case was found where this could be provoked
4482 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4483 components; fortuitously, this particular loophole had already been fixed
4484 by change 4.50/55 above.
4486 If there are any other similar loopholes, the new check in host_aton()
4487 itself should stop them being exploited. The report I received stated that
4488 data on the command line could provoke the exploit when Exim was running as
4489 exim, but did not say which command line option was involved. All I could
4490 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4491 running as the user.
4494 61. There was a buffer overflow vulnerability in the SPA authentication code
4495 (which came originally from the Samba project). I have added a test to the
4496 spa_base64_to_bits() function which I hope fixes it.
4499 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4500 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4502 63. The daemon start-up calls getloadavg() while still root for those OS that
4503 need the first call to be done as root, but it missed one case: when
4504 deliver_queue_load_max is set with deliver_drop_privilege. This is
4505 necessary for the benefit of the queue runner, because there is no re-exec
4506 when deliver_drop_privilege is set.
4508 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4509 This has been fixed.
4511 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4512 was in use, was not putting the data itself into the right store pool;
4513 consequently, it could be overwritten for a subsequent message in the same
4514 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4517 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4519 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4520 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4521 the function were treating the return as a boolean value, which happened to
4522 work because 0=false and not-0=true, but is not correct code.
4524 68. The host_aton() function was not handling scoped IPv6 addresses (those
4525 with, for example, "%eth0" on the end) correctly.
4527 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4528 negated items (that is, ~something) in unsigned ints. Some compilers
4529 apparently mutter when there is no cast.
4531 70. If an address verification called from an ACL failed, and did not produce a
4532 user-specific message (i.e. there was only a "system" message), nothing was
4533 put in $acl_verify_message. In this situation, it now puts the system
4536 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4537 session; change 4.31/43 added the unwanted input to the log line - except
4538 that it did not do this in the start of session case. It now does.
4540 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4541 This is wrong and can cause the other end to generate a synchronization
4542 error if it is another Exim or anything else that does the synchronization
4543 check. A QUIT command is no longer sent after a timeout.
4545 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4546 during host lookups.
4548 74. The defer_ok option of callout verification was not working if it was used
4549 when verifying addresses in header lines, that is, for this case:
4551 verify = header_sender/callout=defer_ok
4553 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4554 those file descriptors could be used for SMTP connections. If anything
4555 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4556 could be sent to the SMTP client, causing chaos. The daemon now opens
4557 stdin, stdout, and stderr to /dev/null when it puts itself into the
4560 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4561 log by default. The user can override this with suitable Perl magic.
4563 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4564 the log message when discard triggers, was not working for the DATA ACL or
4565 for the non-SMTP ACL.
4567 78. Error message wording change in sieve.c.
4569 79. If smtp_accept_max_per_host was set, the number of connections could be
4570 restricted to fewer than expected, because the daemon was trying to set up
4571 a new connection before checking whether the processes handling previous
4572 connections had finished. The check for completed processes is now done
4573 earlier. On busy systems, this bug wouldn't be noticed because something
4574 else would have woken the daemon, and it would have reaped the completed
4577 80. If a message was submitted locally by a user whose login name contained one
4578 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4579 It caused a spool format error. I have fixed the spool reading code. A
4580 related problem was that the "from" clause in the Received: line became
4581 illegal because of the space(s). It is now covered by ${quote_local_part.
4583 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4586 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4588 83. Patch from Sieve maintainer to fix unterminated string problem in
4589 "vacation" handling.
4591 84. Some minor changes to the Linux configuration files to help with other
4592 OS variants using glibc.
4594 85. One more patch for Sieve to update vacation handling to latest spec.
4597 ----------------------------------------------------
4598 See the note above about the 4.44 and 4.50 releases.
4599 ----------------------------------------------------
4605 1. Change 4.43/35 introduced a bug that caused file counts to be
4606 incorrectly computed when quota_filecount was set in an appendfile
4609 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4610 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4613 3. Give more explanation in the error message when the command for a transport
4614 filter fails to execute.
4616 4. There are several places where Exim runs a non-Exim command in a
4617 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4618 was being done only for the command run by the queryprogram router. It is
4619 now done for all such subprocesses. The other cases are: ${run, transport
4620 filters, and the commands run by the lmtp and pipe transports.
4622 5. Some older OS have a limit of 256 on the maximum number of file
4623 descriptors. Exim was using setrlimit() to set 1000 as a large value
4624 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4625 systems. I've change it so that if it can't get 1000, it tries for 256.
4627 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4628 was an oversight, and furthermore, ever since the addition of extra
4629 controls (e.g. 4.43/32), the checks on when to allow different forms of
4630 "control" were broken. There should now be diagnostics for all cases when a
4631 control that does not make sense is encountered.
4633 7. $recipients is now available in the predata ACL (oversight).
4635 8. Tidy the search cache before the fork to do a delivery from a message
4636 received from the command line. Otherwise the child will trigger a lookup
4637 failure and thereby defer the delivery if it tries to use (for example) a
4638 cached ldap connection that the parent has called unbind on.
4640 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4641 of $address_data from the recipient verification was clobbered by the
4642 sender verification.
4644 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4645 was its contents. (It was OK if the option was not defined at all.)
4647 11. A "Completed" log line is now written for messages that are removed from
4648 the spool by the -Mrm option.
4650 12. $host_address is now set to the target address during the checking of
4651 ignore_target_hosts.
4653 13. When checking ignore_target_hosts for an ipliteral router, no host name was
4654 being passed; this would have caused $sender_host_name to have been used if
4655 matching the list had actually called for a host name (not very likely,
4656 since this list is usually IP addresses). A host name is now passed as
4659 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4660 code that specifies a non-restarting handler (typically sigaction() in
4661 modern systems) in an attempt to fix a rare and obscure crash bug.
4663 15. Narrowed the window for a race in the daemon that could cause it to ignore
4664 SIGCHLD signals. This is not a major problem, because they are used only to
4665 wake it up if nothing else does.
4667 16. A malformed maildirsize file could cause Exim to calculate negative values
4668 for the mailbox size or file count. Odd effects could occur as a result.
4669 The maildirsize information is now recalculated if the size or filecount
4672 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4673 support for a long time. Removed HAVE_SYS_VFS_H.
4675 18. Updated exipick to current release from John Jetmore.
4677 19. Allow an empty sender to be matched against a lookup in an address list.
4678 Previously the only cases considered were a regular expression, or an
4681 20. Exim went into a mad DNS lookup loop when doing a callout where the
4682 host was specified on the transport, if the DNS lookup yielded more than
4685 21. The RFC2047 encoding function was originally intended for short strings
4686 such as real names; it was not keeping to the 75-character limit for
4687 encoded words that the RFC imposes. It now respects the limit, and
4688 generates multiple encoded words if necessary. To be on the safe side, I
4689 have increased the buffer size for the ${rfc2047: expansion operator from
4692 22. Failure to deliver a bounce message always caused it to be frozen, even if
4693 there was an errors_to setting on the router. The errors_to setting is now
4696 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4697 canonical form (fully expanded) before being placed in
4698 $sender_host_address.
4700 24. Updated eximstats to version 1.33
4702 25. Include certificate and key file names in error message when GnuTLS fails
4703 to set them up, because the GnuTLS error message doesn't include the name
4704 of the failing file when there is a problem reading it.
4706 26. Expand error message when OpenSSL has problems setting up cert/key files.
4709 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
4710 (this can affect the format of dates).
4712 28. exim_tidydb, when checking for the continued existence of a message for
4713 which it has found a message-specific retry record, was not finding
4714 messages that were in split spool directories. Consequently, it was
4715 deleting retry records that should have stayed in existence.
4717 29. eximstats updated to version 1.35
4718 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4719 1.35 - bugfix such that pie charts by volume are generated correctly
4721 30. The SPA authentication driver was not abandoning authentication and moving
4722 on to the next authenticator when an expansion was forced to fail,
4723 contradicting the general specification for all authenticators. Instead it
4724 was generating a temporary error. It now behaves as specified.
4726 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4727 (the order specifies the preference for clients). The order is now AES256,
4728 AES128, 3DES, ARCFOUR128.
4730 31. Small patch to Sieve code - explicitly set From: when generating an
4733 32. Exim crashed if a remote delivery caused a very long error message to be
4734 recorded - for instance if somebody sent an entire SpamAssassin report back
4735 as a large number of 550 error lines. This bug was coincidentally fixed by
4736 increasing the size of one of Exim's internal buffers (big_buffer) that
4737 happened as part of the Exiscan merge. However, to be on the safe side, I
4738 have made the code more robust (and fixed the comments that describe what
4741 33. Some experimental protocols are using DNS PTR records for new purposes. The
4742 keys for these records are domain names, not reversed IP addresses. The
4743 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4744 leaves it alone. Component reversal etc. now happens only for IP addresses.
4747 34. The host_aton() function is supposed to be passed a string that is known
4748 to be a valid IP address. However, in the case of IPv6 addresses, it was
4749 not checking this. This is a hostage to fortune. Exim now panics and dies
4750 if the condition is not met. A case was found where this could be provoked
4751 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4752 components; fortuitously, this particular loophole had already been fixed
4753 by change 4.50/55 or 4.44/33 above.
4755 If there are any other similar loopholes, the new check in host_aton()
4756 itself should stop them being exploited. The report I received stated that
4757 data on the command line could provoke the exploit when Exim was running as
4758 exim, but did not say which command line option was involved. All I could
4759 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4760 running as the user.
4763 35. There was a buffer overflow vulnerability in the SPA authentication code
4764 (which came originally from the Samba project). I have added a test to the
4765 spa_base64_to_bits() function which I hope fixes it.
4768 36. The daemon start-up calls getloadavg() while still root for those OS that
4769 need the first call to be done as root, but it missed one case: when
4770 deliver_queue_load_max is set with deliver_drop_privilege. This is
4771 necessary for the benefit of the queue runner, because there is no re-exec
4772 when deliver_drop_privilege is set.
4774 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4775 was in use, was not putting the data itself into the right store pool;
4776 consequently, it could be overwritten for a subsequent message in the same
4777 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4780 38. Sometimes the final signoff response after QUIT could fail to get
4781 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4782 < 0 before doing a fflush(). This bug looks as though it goes back to the
4783 introduction of TLS in release 3.20, but "sometimes" must have been rare
4784 because the tests only now provoked it.
4790 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4791 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4792 Now it returns an integer. A number of calls were still expecting a T/F
4793 return. Fortuitously, in all cases, the tests worked in OK situations,
4794 which is the norm. However, things would have gone wrong on any write
4795 failures on the smtp file descriptor. This function is used when sending
4796 messages over SMTP and also when doing verify callouts.
4798 2. When Exim is called to do synchronous delivery of a locally submitted
4799 message (the -odf or -odi options), it no longer closes stderr before doing
4802 3. Implemented the mua_wrapper option.
4804 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4806 5. Implemented the functions header_remove(), header_testname(),
4807 header_add_at_position(), and receive_remove_recipient(), and exported them
4810 6. If an ACL "warn" statement specified the addition of headers, Exim already
4811 inserted X-ACL-Warn: at the start if there was no header name. However, it
4812 was not making this test for the second and subsequent header lines if
4813 there were newlines in the string. This meant that an invalid header could
4814 be inserted if Exim was badly configured.
4816 7. Allow an ACL "warn" statement to add header lines at the start or after all
4817 the Received: headers, as well as at the end.
4819 8. Added the rcpt_4xx retry error code.
4821 9. Added postmaster_mailfrom=xxx to callout verification option.
4823 10. Added mailfrom=xxxx to the callout verification option, for verify=
4826 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4827 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4829 12. Inserted some casts to stop certain compilers warning when using pointer
4830 differences as field lengths or precisions in printf-type calls (mostly
4831 affecting debugging statements).
4833 13. Added optional readline() support for -be (dynamically loaded).
4835 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4836 same clock tick as a message's arrival, so that its received time was the
4837 same as the "first fail" time on the retry record, and that message
4838 remained on the queue past the ultimate address timeout, every queue runner
4839 would try a delivery (because it was past the ultimate address timeout) but
4840 after another failure, the ultimate address timeout, which should have then
4841 bounced the address, did not kick in. This was a "< instead of <=" error;
4842 in most cases the first failure would have been in the next clock tick
4843 after the received time, and all would be well.
4845 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4846 being recognized when the domain list was tested by the match_domain
4847 condition in an expansion string.
4849 16. Added the ${str2b64: operator.
4851 17. Exim was always calling setrlimit() to set a large limit for the number of
4852 processes, without checking whether the existing limit was already
4853 adequate. (It did check for the limit on file descriptors.) Furthermore,
4854 errors from getrlimit() and setrlimit() were being ignored. Now they are
4855 logged to the main and panic logs, but Exim does carry on, to try to do its
4856 job under whatever limits there are.
4858 18. Imported PCRE 5.0.
4860 19. Trivial typo in log message " temporarily refused connection" (the leading
4863 20. If the log selector return_path_on_delivery was set and an address was
4864 redirected to /dev/null, the delivery process crashed because it assumed
4865 that a return path would always be set for a "successful" delivery. In this
4866 case, the whole delivery is bypassed as an optimization, and therefore no
4869 21. Internal re-arrangement: the function for sending a challenge and reading
4870 a response while authentication was assuming a zero-terminated challenge
4871 string. It's now changed to take a pointer and a length, to allow for
4872 binary data in such strings.
4874 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4876 23. Exim was not respecting finduser_retries when seeking the login of the
4877 uid under which it was called; it was always trying 10 times. (The default
4878 setting of finduser_retries is zero.) Also, it was sleeping after the final
4879 failure, which is pointless.
4881 24. Implemented tls_on_connect_ports.
4883 25. Implemented acl_smtp_predata.
4885 26. If the domain in control=submission is set empty, Exim assumes that the
4886 authenticated id is a complete email address when it generates From: or
4887 Sender: header lines.
4889 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4890 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4891 chown and chgrp in /bin and hostname in /usr/bin.
4893 28. Exim was keeping the "process log" file open after each use, just as it
4894 does for the main log. This opens the possibility of it remaining open for
4895 long periods when the USR1 signal hits a daemon. Occasional processlog
4896 errors were reported, that could have been caused by this. Anyway, it seems
4897 much more sensible not to leave this file open at all, so that is what now
4900 29. The long-running daemon process does not normally write to the log once it
4901 has entered its main loop, and it closes the log before doing so. This is
4902 so that log files can straightforwardly be renamed and moved. However,
4903 there are a couple of unusual error situations where the daemon does write
4904 log entries, and I had neglected to close the log afterwards.
4906 30. The text of an SMTP error response that was received during a remote
4907 delivery was being truncated at 512 bytes. This is too short for some of
4908 the long messages that one sometimes sees. I've increased the limit to
4911 31. It is now possible to make retry rules that apply only when a message has a
4912 specific sender, in particular, an empty sender.
4914 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4915 it possible to be selective about when SMTP synchronization is enforced.
4917 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4919 32. Implemented hosts_connection_nolog.
4921 33. Added an ACL for QUIT.
4923 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4926 35. Added mailbox_size and mailbox_filecount to appendfile.
4928 36. Added control = no_multiline_responses to ACLs.
4930 37. There was a bug in the logic of the code that waits for the clock to tick
4931 in the case where the clock went backwards by a substantial amount such
4932 that the microsecond fraction of "now" was more than the microsecond
4933 fraction of "then" (but the whole seconds number was less).
4935 38. Added support for the libradius Radius client library this is found on
4936 FreeBSD (previously only the radiusclient library was supported).
4942 1. When certain lookups returned multiple values in the form name=value, the
4943 quoting of the values was not always being done properly. Specifically:
4944 (a) If the value started with a double quote, but contained no whitespace,
4946 (b) If the value contained whitespace other than a space character (i.e.
4947 tabs or newlines or carriage returns) it was not quoted.
4948 This fix has been applied to the mysql and pgsql lookups by writing a
4949 separate quoting function and calling it from the lookup code. The fix
4950 should probably also be applied to nisplus, ibase and oracle lookups, but
4951 since I cannot test any of those, I have not disturbed their existing code.
4953 2. A hit in the callout cache for a specific address caused a log line with no
4954 reason for rejecting RCPT. Now it says "Previous (cached) callout
4955 verification failure".
4957 3. There was an off-by-one bug in the queryprogram router. An over-long
4958 return line was truncated at 256 instead of 255 characters, thereby
4959 overflowing its buffer with the terminating zero. As well as fixing this, I
4960 have increased the buffer size to 1024 (and made a note to document this).
4962 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4963 when Exim is waiting for an SMTP response from a remote server, Exim
4964 restarts its select() call on the socket, thereby resetting its timeout.
4965 This is not a problem when such interrupts are rare. Somebody set up a cron
4966 job to run exiwhat every 2 minutes, which is less than the normal select()
4967 timeout (5 or 10 minutes). This meant that the select() timeout never
4968 kicked in because it was always reset. I have fixed this by comparing the
4969 time when an interrupt arrives with the time at the start of the first call
4970 to select(). If more time than the timeout has elapsed, the interrupt is
4971 treated as a timeout.
4973 5. Some internal re-factoring in preparation for the addition of Sieve
4974 extensions (by MH). In particular, the "personal" test is moved to a
4975 separate function, and given an option for scanning Cc: and Bcc: (which is
4976 not set for Exim filters).
4978 6. When Exim created an email address using the login of the caller as the
4979 local part (e.g. when creating a From: or Sender: header line), it was not
4980 quoting the local part when it contained special characters such as @.
4982 7. Installed new OpenBSD configuration files.
4984 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4985 try to make them clearer.
4987 9. Callout options, other than the timeout value, were being ignored when
4988 verifying sender addresses in header lines. For example, when using
4990 verify = header_sender/callout=no_cache
4992 the cache was (incorrectly) being used.
4994 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4995 only the Cygwin environment.
4997 11. When return_path_on_delivery was set as a log selector, if different remote
4998 addresses in the same message used different return paths and parallel
4999 remote delivery occurred, the wrong values would sometimes be logged.
5000 (Whenever a remote delivery process finished, the return path value from
5001 the most recently started remote delivery process was logged.)
5003 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5004 lines when AUTH and/or TLS are in use. This is the "received protocol"
5005 field. Exim used to use "asmtp" for authenticated SMTP, without any
5006 indication (in the protocol name) for TLS use. Now it follows the RFC and
5007 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5008 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5009 names appear in log lines as well as in Received: header lines.
5011 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5012 extensions, and comparison tests, and to fix some bugs.
5014 14. Changes to the "personal" filter test:
5016 (1) The test was buggy in that it was just doing the equivalent of
5017 "contains" tests on header lines. For example, if a user's address was
5018 anne@some.where, the "personal" test would incorrectly be true for
5020 To: susanne@some.where
5022 This test is now done by extracting each address from the header in turn,
5023 and checking the entire address. Other tests that are part of "personal"
5024 are now done using regular expressions (for example, to check local parts
5025 of addresses in From: header lines).
5027 (2) The list of non-personal local parts in From: addresses has been
5028 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5029 taken from the Sieve specification recommendations.
5031 (3) If the message contains any header line starting with "List-" it is
5032 treated as non-personal.
5034 (4) The test for "circular" in the Subject: header line has been removed
5035 because it now seems ill-conceived.
5037 15. Minor typos in src/EDITME comments corrected.
5039 16. Installed latest exipick from John Jetmore.
5041 17. If headers_add on a router specified a text string that was too long for
5042 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5043 of string_sprintf() is now avoided.
5045 18. $message_body_size was not set (it was always zero) when running the DATA
5046 ACL and the local_scan() function.
5048 19. For the "mail" command in an Exim filter, no default was being set for
5049 the once_repeat time, causing a random time value to be used if "once" was
5050 specified. (If the value happened to be <= 0, no repeat happened.) The
5051 default is now 0s, meaning "never repeat". The "vacation" command was OK
5052 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5053 (I found it when inspecting the code).
5055 20. There is now an overall timeout for performing a callout verification. It
5056 defaults to 4 times the callout timeout, which applies to individual SMTP
5057 commands during the callout. The overall timeout applies when there is more
5058 than one host that can be tried. The timeout is checked before trying the
5059 next host. This prevents very long delays if there are a large number of
5060 hosts and all are timing out (e.g. when the network connections are timing
5061 out). The value of the overall timeout can be changed by specifying an
5062 additional sub-option for "callout", called "maxwait". For example:
5064 verify = sender/callout=5s,maxwait=20s
5066 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5067 to the end before writing, but this should make it even safer).
5069 22. Exim was forgetting that it had advertised PIPELINING for the second and
5070 subsequent messages on an SMTP connection. It was also not resetting its
5071 memory on STARTTLS and an internal HELO.
5073 23. When Exim logs an SMTP synchronization error within a session, it now
5074 records whether PIPELINING has been advertised or not.
5076 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5077 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5078 rather than long int.
5080 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5082 26. Added the never_mail option to autoreply.
5088 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5089 crash if the getsockname() call failed; this can happen if a connection is
5090 closed very soon after it is established. The problem was simply in the
5091 order in which certain operations were done, causing Exim to try to write
5092 to the SMTP stream before it had set up the file descriptor. The bug has
5093 been fixed by making things happen in the correct order.
5099 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5100 before the connection was closed, thus losing the rejection response.
5102 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5103 some early Solaris releases, but causes trouble in current releases where
5104 socklen_t is defined.
5106 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5109 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5112 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5113 that releasing the top of it at the end releases what was used for sub-
5114 expansions (unless the block got too big). However, discard this block if
5115 the first thing is a variable or header, so that we can use its block when
5116 it is dynamic (useful for very large $message_headers, for example).
5118 6. Lookups now cache *every* query, not just the most recent. A new, separate
5119 store pool is used for this. It can be recovered when all lookup caches are
5120 flushed. Lookups now release memory at the end of their result strings.
5121 This has involved some general refactoring of the lookup sources.
5123 7. Some code has been added to the store_xxx() functions to reduce the amount
5124 of flapping under certain conditions.
5126 8. log_incoming_interface used to affect only the <= reception log lines. Now
5127 it causes the local interface and port to be added to several more SMTP log
5128 lines, for example "SMTP connection from", and rejection lines.
5130 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5132 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5134 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5135 could be overwritten at the end of the current message (or the start of a
5136 new message if it was set in a HELO ACL). The value is now preserved for
5137 the duration of the SMTP connection.
5139 12. If a transport had a headers_rewrite setting, and a matching header line
5140 contained an unqualified address, that address was qualified, even if it
5141 did not match any rewriting rules. The underlying bug was that the values
5142 of the flags that permit the existence of unqualified sender and recipient
5143 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5144 non-local messages, and by -bnq for local messages) were not being
5145 preserved with the message after it was received.
5147 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5148 "next input=" as part of the text comprising the host identity instead of
5149 the correct text. The code was using the same buffer for two different
5150 strings. However, depending on which order the printing function evaluated
5151 its arguments, the bug did not always show up. Under Linux, for example, my
5152 test suite worked just fine.
5154 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5155 doesn't work with some older versions of Perl. It has been changed to "my",
5156 which in any case is probably the better facility to use.
5158 15. A really picky compiler found some instances of statements for creating
5159 error messages that either had too many or two few arguments for the format
5162 16. The size of the buffer for calls to the DNS resolver has been increased
5163 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5164 for addresses that have a lot of PTR records. This alleviates a problem; it
5165 does not fully solve it.
5167 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5168 buffer now truncates the list and logs the incident, which is the same
5169 action as happens when Exim is looking up a host name and its aliases.
5170 Previously in this situation something unpredictable would happen;
5171 sometimes it was "internal error: store_reset failed".
5173 18. If a server dropped the connection unexpectedly when an Exim client was
5174 using GnuTLS and trying to read a response, the client delivery process
5175 crashed while trying to generate an error log message.
5177 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5178 string, for example:
5180 warn message = H1: something\nH2: something
5182 the text was added as a single header line from Exim's point of view
5183 though it ended up OK in the delivered message. However, searching for the
5184 second and subsequent header lines using $h_h2: did not work. This has been
5185 fixed. Similarly, if a system filter added multiple headers in this way,
5186 the routers could not see them.
5188 20. Expanded the error message when iplsearch is called with an invalid key to
5189 suggest using net-iplsearch in a host list.
5191 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5192 ACLs are no longer actually imposed (and a message to that effect is
5195 22. If a "gecos" field in a passwd entry contained escaped characters, in
5196 particular, if it contained a \" sequence, Exim got it wrong when building
5197 a From: or a Sender: header from that name. A second bug also caused
5198 incorrect handling when an unquoted " was present following a character
5199 that needed quoting.
5201 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5202 was not being matched caselessly.
5204 24. Arranged for all hyphens in the exim.8 source to be escaped with
5207 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5208 properly. Recipient callout cache records were still being keyed to include
5209 the sender, even when use_sender was set false. This led to far more
5210 callouts that were necessary. The sender is no longer included in the key
5211 when use_sender is false.
5213 26. Added "control = submission" modifier to ACLs.
5215 27. Added the ${base62d: operator to decode base 62 numbers.
5217 28. dnsdb lookups can now access SRV records.
5219 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5220 the configuration file.
5222 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5223 (-v) mode. This makes the output for a verbose queue run more intelligible.
5225 31. Added a use_postmaster feature to recipient callouts.
5227 32. Added the $body_zerocount variable, containing the number of binary zero
5228 bytes in the message body.
5230 33. The time of last modification of the "new" subdirectory is now used as the
5231 "mailbox time last read" when there is a quota error for a maildir
5234 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5236 35. Added +ignore_unknown as a special item in host lists.
5238 36. Code for decoding IPv6 addresses in host lists is now included, even if
5239 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5240 address was recognized as an IP address, but was then not correctly decoded
5241 into binary, causing unexpected and incorrect effects when compared with
5248 1. Very minor rewording of debugging text in manualroute to say "list of
5249 hosts" instead of "hostlist".
5251 2. If verify=header_syntax was set, and a header line with an unqualified
5252 address (no domain) and a large number of spaces between the end of the
5253 name and the colon was received, the reception process suffered a buffer
5254 overflow, and (when I tested it) crashed. This was caused by some obsolete
5255 code that should have been removed. The fix is to remove it!
5257 3. When running in the test harness, delay a bit after writing a bounce
5258 message to get a bit more predictability in the log output.
5260 4. Added a call to search_tidyup() just before forking a reception process. In
5261 theory, someone could use a lookup in the expansion of smtp_accept_max_
5262 per_host which, without the tidyup, could leave open a database connection.
5264 5. Added the variables $recipient_data and $sender_data which get set from a
5265 lookup success in an ACL "recipients" or "senders" condition, or a router
5266 "senders" option, similar to $domain_data and $local_part_data.
5268 6. Moved the writing of debug_print from before to after the "senders" test
5271 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5272 problems for message scanning, either using a data ACL, or using
5273 local_scan() because the Received: header was not generated till after they
5274 were called (in order to set the time as the time of reception completion).
5275 I have revised the way this works. The header is now generated after the
5276 body is received, but before the ACL or local_scan() are called. After they
5277 are run, the timestamp in the header is updated.
5283 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5284 before starting a queue runner without re-exec. This happened only when
5285 deliver_drop_privilege was set or when the Exim user was set to root. The
5286 effect of the bug was that timeouts during subsequent deliveries caused
5287 crashes instead of being properly handled. The handler is now left at its
5288 default (and expected) setting.
5290 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5291 message, again when deliver_drop_privilege is set or Exim is run as root.
5292 The bug described in (1) was not present in this case, but the tidying up
5293 of the other signals was missing. I have made the two cases consistent.
5295 3. The ignore_target_hosts setting on a manualroute router was being ignored
5296 for hosts that were looked up using the /MX notation.
5298 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5301 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5302 operated on the sender address. After changing the $sender_address to <>
5303 for the sender address verify, Exim was re-instated it as the original
5304 (before rewriting) address, but remembering that it had rewritten it, so it
5305 wasn't rewriting it again. This bug also had the effect of breaking the
5306 sender address verification caching when the sender address was rewritten.
5308 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5309 This has been changed so that if the ip literal address matches
5310 ignore_target_hosts, the router declines.
5312 7. Added expansion conditions match_domain, match_address, and match_local_
5313 part (NOT match_host).
5315 8. The placeholder for the Received: header didn't have a length field set.
5317 9. Added code to Exim itself and to exim_lock to test for a specific race
5318 condition that could lead to file corruption when using MBX delivery. The
5319 issue is with the lockfile that is created in /tmp. If this file is removed
5320 after a process has opened it but before that process has acquired a lock,
5321 there is the potential for a second process to recreate the file and also
5322 acquire a lock. This could lead to two Exim processes writing to the file
5323 at the same time. The added code performs the same test as UW imapd; it
5324 checks after acquiring the lock that its file descriptor still refers to
5325 the same named file.
5327 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5328 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5331 11. Added the smtp_active_hostname option. If used, this will typically be made
5332 to depend on the incoming interface address. Because $interface_address is
5333 not set up until the daemon has forked a reception process, error responses
5334 that can happen earlier (such as "too many connections") no longer contain
5337 12. If an expansion in a condition on a "warn" statement fails because a lookup
5338 defers, the "warn" statement is abandoned, and the next ACL statement is
5339 processed. Previously this caused the whole ACL to be aborted.
5341 13. Added the iplsearch lookup type.
5343 14. Added ident_timeout as a log selector.
5345 15. Added tls_certificate_verified as a log selector.
5347 16. Added a global option tls_require_ciphers (compare the smtp transport
5348 option of the same name). This controls incoming TLS connections.
5350 17. I finally figured out how to make tls_require_ciphers do a similar thing
5351 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5352 before starting the TLS session.
5354 18. Tabs are now shown as \t in -bP output.
5356 19. If the log selector return_path_on_delivery was set, Exim crashed when
5357 bouncing a message because it had too many Received: header lines.
5359 20. If two routers both had headers_remove settings, and the first one included
5360 a superfluous trailing colon, the final name in the first list and the
5361 first name in the second list were incorrectly joined into one item (with a
5362 colon in the middle).
5368 1. Added -C and -D options to the exinext utility, mainly to make it easier
5369 to include in the automated testing, but these could be helpful when
5370 multiple configurations are in use.
5372 2. The exinext utility was not formatting the output nicely when there was
5373 an alternate port involved in the retry record key, nor when there was a
5374 message id as well (for retries that were specific to a specific message
5375 and a specific host). It was also confused by IPv6 addresses, because of
5376 the additional colons they contain. I have fixed the IPv4 problem, and
5377 patched it up to do a reasonable job for IPv6.
5379 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5380 delivery, the log line now contains "pipelined" if PIPELINING was used.
5382 4. An SMTP transport process used to panic and die if the bind() call to set
5383 an explicit outgoing interface failed. This has been changed; it is now
5384 treated in the same way as a connect() failure.
5386 5. A reference to $sender_host_name in the part of a conditional expansion
5387 that was being skipped was still causing a DNS lookup. This no longer
5390 6. The def: expansion condition was not recognizing references to header lines
5391 that used bh_ and bheader_.
5393 7. Added the _cache feature to named lists.
5395 8. The code for checking quota_filecount in the appendfile transport was
5396 allowing one more file than it should have been.
5398 9. For compatibility with Sendmail, the command line option
5406 and sets the incoming protocol and host name (for trusted callers). The
5407 host name and its colon can be omitted when only the protocol is to be set.
5408 Note the Exim already has two private options, -pd and -ps, that refer to
5409 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5410 "s", but I don't think that's a major issue.
5412 10. A number of refactoring changes to the code, none of which should affect
5415 (a) The number of logging options was getting close to filling up the
5416 32-bit word that was used as a bit map. I have split them into two classes:
5417 those that are passed in the argument to log_write(), and those that are
5418 only ever tested independently outside of that function. These are now in
5419 separate 32-bit words, so there is plenty of room for expansion again.
5420 There is no change in the user interface or the logging behaviour.
5422 (b) When building, for example, log lines, the code previously used a
5423 macro that called string_cat() twice, in order to add two strings. This is
5424 not really sufficiently general. Furthermore, there was one instance where
5425 it was actually wrong because one of the argument was used twice, and in
5426 one call a function was used. (As it happened, calling the function twice
5427 did not affect the overall behaviour.) The macro has been replaced by a
5428 function that can join an arbitrary number of extra strings onto a growing
5431 (c) The code for expansion conditions now uses a table and a binary chop
5432 instead of a serial search (which was left over from when there were very
5433 few conditions). Also, it now recognizes conditions like "pam" even when
5434 the relevant support is not compiled in: a suitably worded error message is
5435 given if an attempt is made to use such a condition.
5437 11. Added ${time_interval:xxxxx}.
5439 12. A bug was causing one of the ddress fields not to be passed back correctly
5440 from remote delivery subprocesses. The field in question was not being
5441 subsequently used, so this caused to problems in practice.
5443 13. Added new log selectors queue_time and deliver_time.
5445 14. Might have fixed a bug in maildirsizefile handling that threw up
5446 "unexpected character" debug warnings, and recalculated the data
5447 unnecessarily. In any case, I expanded the warning message to give more
5450 15. Added the message "Restricted characters in address" to the statements in
5451 the default ACL that block characters like @ and % in local parts.
5453 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5454 Three changes have been made:
5456 (a) There was a serious bug; a negative response to MAIL caused the whole
5457 recipient domain to be cached as invalid, thereby blocking all messages
5458 to all local parts at the same domain, from all senders. This bug has
5459 been fixed. The domain is no longer cached after a negative response to
5460 MAIL if the sender used is not empty.
5462 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5465 (c) A new callout option, "use_sender" has been added for people who want
5466 the modified behaviour.
5472 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5475 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5476 indeed breaks things for older releases.
5478 3. Added additional logging to the case where there is a problem reading data
5479 from a filter that is running in a subprocess using a pipe, in order to
5480 try to track down a specific problem.
5482 4. Testing facility fudge: when running in the test harness and attempting
5483 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5484 getting "No route to host". Convert this to a timeout.
5486 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5489 6. Some OS don't have socklen_t but use size_t instead. This affects the
5490 fifth argument of getsockopt() amongst other things. This is now
5491 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5492 can be set for individual OS. I have set it for SunOS5, OSF1, and
5493 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5494 some earlier ones do not.
5496 7. Change 4.30/15 was not doing the test caselessly.
5498 8. The standard form for an IPv6 address literal was being rejected by address
5499 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5500 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5501 this, as well as the form without the "IPv6" on the front (but only when
5502 address literals are enabled, of course).
5504 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5506 10. Exim crashed if a message with an empty sender address specified by -f
5507 encountered a router with an errors_to setting. This could be provoked only
5508 by a command such as
5512 where an empty string was supplied; "<>" did not hit this bug.
5514 11. Installed PCRE release 4.5.
5516 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5517 remained set. It is now erased.
5519 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5520 times from message ids (which are base 36 rather than the normal 62).
5522 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5523 were being counted as actual protocol errors, and logged if the log
5524 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5525 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5526 and DATA following a set of rejected RCPTs do not count as protocol errors.
5527 In other words, Exim assumes they were pipelined, though this may not
5528 actually be the case. Of course, in all cases the client gets an
5529 appropriate error code.
5531 15. If a lookup fails in an ACL condition, a message about the failure may
5532 be available; it is used if testing the ACL cannot continue, because most
5533 such messages specify what the cause of the deferral is. However, some
5534 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5535 that caused an old message to be retained and used if a later statement
5536 caused a defer, replacing the real cause of the deferral.
5538 16. If an IP address had so many PTR records that the DNS lookup buffer
5539 was not large enough to hold them, Exim could crash while trying to process
5540 the truncated data. It now detects and logs this case.
5542 17. Further to 4.21/58, another change has been made: if (and only if) the
5543 first line of a message (the first header line) ends with CRLF, a bare LF
5544 in a subsequent header line has a space inserted after it, so as not to
5545 terminate the header.
5547 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5548 unnecessarily, used atoi() instead of strtol(), and didn't check the
5549 termination when getting file sizes from file names by regex.
5551 19. Completely re-implemented the support for maildirsize files, in the light
5552 of a number of problems with the previous contributed implementation
5553 (4.30/29). In particular:
5555 . If the quota is zero, the maildirsize file is maintained, but no quota is
5558 . If the maildir directory does not exist, it is created before any attempt
5559 to write a maildirsize file.
5561 . The quota value in the file is just a cache; if the quota is changed in
5562 the transport, the new value overrides.
5564 . A regular expression is available for excluding directories from the
5567 20. The autoreply transport checks the characters in options that define the
5568 message's headers; it allows continued headers, but it was checking with
5569 isspace() after an embedded newline instead of explicitly looking for a
5572 21. If all the "regular" hosts to which an address was routed had passed their
5573 expiry times, and had not reached their retry times, the address was
5574 bounced, even if fallback hosts were defined. Now Exim should go on to try
5577 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5578 equivalent code in the SMTP transport. Some hosts send humungous responses
5579 to HELO/EHLO, more than 1024 it seems.
5581 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5582 gives compiler warnings in some environments. I've now done it "properly",
5585 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5586 (because of problems with the built-in one) was declared to return uschar *
5587 instead of char *, causing compiler failure.
5589 25. Fixed a file descriptor leak when processing alias/forward files.
5591 26. Fixed a minor format string issue in dbfn.c.
5593 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5595 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5596 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5599 29. When a sender address is verified, it is cached, to save repeating the test
5600 when there is more than one recipient in a message. However, when the
5601 verification involves a callout, it is possible for different callout
5602 options to be set for different recipients. It is too complicated to keep
5603 track of this in the cache, so now Exim always runs a verification when a
5604 callout is required, relying on the callout cache for the optimization.
5605 The overhead is duplication of the address routing, but this should not be
5608 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5609 to be verified with callout=postmaster, and the main callout worked but the
5610 postmaster check failed, the verification correctly failed. However, if a
5611 subsequent RCPT command asked for sender verification *without* the
5612 postmaster check, incorrect caching caused this verification also to fail,
5615 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5616 it was not caching the DNS options (qualify_single, search_parents) that
5617 were used when the lookup failed. A subsequent lookup with different
5618 options therefore always gave the same answer, though there were cases
5619 where it should not have. (Example: a "domains = !$mx_any" option on a
5620 dnslookup router: the "domains" option is always processed without any
5621 widening, but the router might have qualify_single set.) Now Exim uses the
5622 cached value only when the same options are set.
5624 32. Added John Jetmore's "exipick" utility to the distribution.
5626 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5627 than a timeout (e.g. a certificate is required, and is not provided), an
5628 Exim server now closes the connection immediately. Previously it waited for
5629 the client to close - but if the client is SSL, it seems that they each
5630 wait for each other, leading to a delay before one of them times out.
5632 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5633 maintained 0.8.x compatibility because I don't think many are using it, and
5634 it is clearly obsolete.
5636 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5639 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
5640 client certificate was expired. A simple patch fixes this, though I don't
5641 understand the full logic of why the verify callback is called multiple
5644 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
5645 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
5646 which causes problems with some clients (such as the Certicom SSL Plus
5647 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
5648 disables the coutermeasure allowing Eudora to connect."
5650 38. Exim was not checking that a write() to a log file succeeded. This could
5651 lead to Bad Things if a log got too big, in particular if it hit a file
5652 size limit. Exim now panics and dies if it cannot write to a log file, just
5653 as it does if it cannot open a log file.
5655 39. Modified OS/Makefile-Linux so that it now contains
5657 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
5659 The two -D definitions ensure that Exim is compiled with large file
5660 support, which makes it possible to handle log files that are bigger than
5663 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
5664 instance) a domain was checked against a named list that involved a lookup,
5665 causing $domain_data to be set, then another domain was checked against the
5666 same list, then the first domain was re-checked, the value of $domain_data
5667 after the final check could be wrong. In particular, if the second check
5668 failed, it could be set empty. This bug probably also applied to
5671 41. The strip_trailing_dot option was not being applied to the address given
5672 with the -f command-line option.
5674 42. The code for reading a message's header from the spool was incrementing
5675 $received_count, but never initializing it. This meant that the value was
5676 incorrect (doubled) while delivering a message in the same process in which
5677 it was received. In the most common configuration of Exim, this never
5678 happens - a fresh exec is done - but it can happen when
5679 deliver_drop_privilege is set.
5681 43. When Exim logs an SMTP synchronization error - client data sent too soon -
5682 it now includes up to 150 characters of the unexpected data in the log
5685 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
5686 and building data strings. The size of both of these buffers was 10 000
5687 bytes - far larger than anybody would *ever* want, thought I. Needless to
5688 say, somebody hit the limit. I have increased the maximum line length to
5689 20 000 and the maximum data length of concatenated lines to 100 000. I have
5690 also fixed two bugs, because there was no checking on these buffers. Tsk,
5691 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
5692 buffer is too small.
5694 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
5695 lsearch lookups. Now it does.
5697 46. When parsing a route_list item in a manualroute router, a fixed-length
5698 buffer was used for the list of hosts. I made this 1024 bytes long,
5699 thinking that nobody would ever have a list of hosts that long. Wrong.
5700 Somebody had a whole pile of complicated expansion conditions, and the
5701 string was silently truncated, leading to an expansion error. It turns out
5702 that it is easier to change to an unlimited length (owing to other changes
5703 that have happened since this code was originally written) than to build
5704 structure for giving a limitation error. The length of the item that
5705 expands into the list of hosts is now unlimited.
5707 47. The lsearch lookup could not handle data where the length of text line was
5708 more than 4095 characters. Such lines were truncated, leading to shortened
5709 data being returned. It should now handle lines of any length.
5711 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
5712 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5715 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5716 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5717 no longer happens in comment lines. A list of replacements is now placed
5718 at the head of all of the source files, except those whose only change is
5719 to replace PERL_COMMAND in the very first #! line.
5721 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5722 messages on the queue, with a bottom-up merge sort, using code contributed
5723 by Michael Haardt. This should make operations like -bp somewhat faster on
5724 large queues. It won't affect queue runners, except when queue_run_in_order
5727 51. Installed eximstats 1.31 in the distribution.
5729 52. Added support for SRV lookups to the dnslookup router.
5731 53. If an ACL referred to $message_body or $message_body_end, the value was not
5732 reset for any messages that followed in the same SMTP session.
5734 54. The store-handling optimization for building very long strings was not
5735 differentiating between the different store pools. I don't think this
5736 actually made any difference in practice, but I've tidied it.
5738 55. While running the routers to verify a sender address, $sender_address
5739 was still set to the sender address. This is wrong, because when routing to
5740 send a bounce to the sender, it would be empty. Therefore, I have changed
5741 it so that, while verifying a sender address, $sender_address is set to <>.
5742 (There is no change to what happens when verifying a recipient address.)
5744 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5745 target A or AAAA records (if not already returned) without resetting the
5746 qualify_single or search_parents options of the DNS resolver. These are
5747 inappropriate in this case because the targets of MX and SRV records must
5748 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5749 target that, when qualified, matched something in the local domain. These
5750 two options are now turned off when doing these lookups.
5752 57. It seems that at least some releases of Reiserfs (which does not have the
5753 concept of a fixed number of inodes) returns zero and not -1 for the
5754 number of available inodes. This interacted badly with check_spool_inodes,
5755 which assumed that -1 was the "no such thing" setting. What I have done is
5756 to check that the total number of inodes is greater than zero before doing
5757 the test of how many are available.
5759 58. When a "warn" ACL statement has a log_message modifier, the message is
5760 remembered, and not repeated. This is to avoid a lot of repetition when a
5761 message has many recipients that cause the same warning to be written.
5762 However, Exim was preserving the list of already written lines for an
5763 entire SMTP session, which doesn't seem right. The memory is now reset if a
5764 new message is started.
5766 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5767 debugging output unless log_rewrite was also set.
5769 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5770 of (int)(handle) when we know that handle contains (void *)(-1).
5772 61. The Exim daemon panic-logs an error return when it closes the incoming
5773 connection. However "connection reset by peer" seems to be common, and
5774 isn't really an error worthy of noting specially, so that particular error
5777 62. When Exim is trying to find all the local interfaces, it used to panic and
5778 die if the ioctl to get the interface flags failed. However, it seems that
5779 on at least one OS (Solaris 9) it is possible to have an interface that is
5780 included in the list of interfaces, but for which you get a failure error
5781 for this call. This happens when the interface is not "plumbed" into a
5782 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5783 failure of the "get flags" call assumes that the interface is down.
5785 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5786 makes life easier for people who are doing arithmetic on fields extracted
5787 from dates, where you often get leading zeros that should not be
5788 interpreted as octal.
5790 64. Added qualify_domain to the redirect router, to override the global
5793 65. If a pathologically long header line contained very many addresses (the
5794 report of this problem mentioned 10 000) and each of them was rewritten,
5795 Exim could use up a very large amount of memory. (It kept on making new
5796 copies of the header line as it rewrote, and never released the old ones.)
5797 At the expense of a bit more processing, the header rewriting function has
5798 been changed so that it no longer eats memory in this way.
5800 66. The generation of the Received: header has been moved from the time that a
5801 message starts to be received, to the time that it finishes. The timestamp
5802 in the Received: header should now be very close to that of the <= log
5803 line. There are two side-effects of this change:
5805 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5806 logged header lines no longer include the local Received: line, because
5807 it has not yet been created. The same applies to a copy of the message
5808 that is returned to a non-SMTP sender when a message is rejected.
5810 (b) When a filter file is tested using -bf, no additional Received: header
5811 is added to the test message. After some thought, I decided that this
5814 This change does not affect the value of $received_for. It is still set
5815 after address rewriting, but before local_scan() is called.
5817 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5819 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5820 gave an unhelpful panic error message, and a defer error. I have managed to
5821 change this behaviour so that it now rejects any supplied certificate,
5822 which seems right, as the list of acceptable certificates is empty.
5824 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5825 gave an unhelpful defer error. I have not managed to make this reject any
5826 supplied certificates, but the error message it gives is "no certificate
5827 supplied", which is not helpful.
5829 70. exigrep's output now also includes lines that are not associated with any
5830 message, but which match the given pattern. Implemented by a patch from
5831 Martin Sluka, which also tidied up the Perl a bit.
5833 71. Recipient callout verification, like sender verification, was using <> in
5834 the MAIL FROM command. This isn't really the right thing, since the actual
5835 sender may affect whether the remote host accepts the recipient or not. I
5836 have changed it to use the actual sender in the callout; this means that
5837 the cache record is now keyed on a recipient/sender pair, not just the
5838 recipient address. There doesn't seem to be a real danger of callout loops,
5839 since a callout by the remote host to check the sender would use <>.
5840 [SEE ABOVE: changed after hitting problems.]
5842 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5843 temporary errors. However, in the case of such a code being given after
5844 the end of a data transmission (i.e. after ".") Exim was failing to write
5845 a retry record for the message. (Yes, there was some broken host that was
5846 actually sending 8xx at this point.)
5848 73. An unknown lookup type in a host list could cause Exim to panic-die when
5849 the list was checked. (An example that provoked this was putting <; in the
5850 middle of a list instead of at the start.) If this happened during a DATA
5851 ACL check, a -D file could be left lying around. This kind of configuration
5852 error no longer causes Exim to die; instead it causes a defer error. The
5853 incident is still logged to the main and panic logs.
5855 74. Buglet left over from Exim 3 conversion. The message "too many messages
5856 in one connection" was written to the rejectlog but not the mainlog, except
5857 when address rewriting (yes!) was being logged.
5859 75. Added write_rejectlog option.
5861 76. When a system filter was run not as root (that is, when system_filter_user
5862 was set), the values of the $n variables were not being returned to the
5863 main process; thus, they were not subsequently available in the $sn
5866 77. Added +return_path_on_delivery log selector.
5868 78. A connection timeout was being treated differently from recipients deferred
5869 when testing hosts_max_try with a message that was older than the host's
5870 retry timeout. (The host should not be counted, thus allowing all hosts to
5871 be tried at least once before bouncing.) This may have been the cause of an
5872 occasionally reported bug whereby a message would remain on the queue
5873 longer than the retry timeout, but would be bounced if a delivery was
5874 forced. I say "may" because I never totally pinned down the problem;
5875 setting up timeout/retry tests is difficult. See also the next item.
5877 79. The ultimate address timeout was not being applied to errors that involved
5878 a combination of host plus message (for example, a timeout on a MAIL
5879 command). When an address resolved to a number of possible hosts, and they
5880 were not all tried for each delivery (e.g. because of hosts_max_try), a
5881 message could remain on the queue longer than the retry timeout.
5883 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5886 81. Fixed an obscure SMTP outgoing bug which required at least the following
5887 conditions: (a) there was another message waiting for the same server;
5888 (b) the server returned 5xx to all RCPT commands in the first message so
5889 that the message was not completed; (c) the server dropped the connection
5890 or gave a negative response to the RSET that Exim sends to abort the
5891 transaction. The observed case was a dropped connection after DATA that had
5892 been sent in pipelining mode. That is, the server had advertised PIPELINING
5893 but was not implementing it correctly. The effect of the bug was incorrect
5894 behaviour, such as trying another host, and this could lead to a crash.
5900 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5901 and daemon.c were passed as pointers to ints; they should have been
5902 pointers to socklen_t variables (which are typically unsigned ints).
5904 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5907 3. Fixed a really odd bug that affected only the testing scheme; patching a
5908 certain fixed string in the binary changed the value of another string that
5909 happened to be identical to the end of the original first string.
5911 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5912 name", it returns that address as the IP address. On some operating
5913 systems (e.g. Solaris), it also passes back the IP address string as the
5914 "host name". However, on others (e.g. Linux), it passes back an empty
5915 string. Exim wasn't checking for this, and was changing the host name to an
5916 empty string, assuming it had been canonicalized.
5918 5. Although rare, it is permitted to have more than one PTR record for a given
5919 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5920 all the names associated with an address, because they do in Solaris.
5921 However, it seems that they do not in Linux for data that comes from the
5922 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5923 I found this out when I moved to a new Linux workstation and tried to run
5924 the Exim test suite.
5926 To get round this problem I have changed the code so that it now does its
5927 own call to the DNS to look up PTR records when searching for a host name.
5928 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5929 addresses that are only in /etc/hosts are still found.
5931 This behaviour is, however, controlled by an option called host_lookup_
5932 order, which defaults to "bydns:byaddr". If people want to use the other
5933 order, or indeed, just use one or the other means of lookup, they can
5934 specify it in this variable.
5936 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5937 some operating systems, this comes back from gethostbyaddr() as an empty
5938 string, and this is what Exim used to test for. However, it seems that in
5939 other systems, "." is yielded. Exim now tests for this case too.
5941 7. The values of check_spool_space and check_log_space are now held internally
5942 as a number of kilobytes instead of an absolute number of bytes. If a
5943 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5944 kilobyte. This means that much larger values can be stored.
5946 8. Exim monitor: an attempt to get the action menu when not actually pointing
5947 at a message produces an empty menu entitled "No message selected". This
5948 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5949 no entries in it ("Shell widget menu has zero width and/or height"). So I
5950 have added a single, blank menu entry in this case.
5952 9. Added ${quote_local_part.
5954 10. MIME decoding is now applied to the contents of Subject: header lines when
5957 11. Now that a reference to $sender_host_address automatically causes a reverse
5958 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5959 host lookup before query-style lookups in lists that might use this
5960 variable. This has therefore been abolished, and the "net-" prefix is no
5961 longer necessary for query-style lookups.
5963 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5964 have been a typo for LFLAGS, so it has been changed.
5966 13. The install script calls Exim with "-C /dev/null" in order to find the
5967 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5968 to be output. However, since Exim outputs its version number before the
5969 error, it didn't break the script. It just looked ugly. I fixed this by
5970 always allowing "-C /dev/null" if the caller is root.
5972 14. Ignore overlarge ACL variable number when reading spool file - insurance
5973 against a later release with more variables having written the file.
5975 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5976 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5977 this, as well as the form without the "IPv6" on the front.
5979 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5980 OS/Makefile-Darwin file.
5982 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5983 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5985 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5986 variable. However, some OS use ints for inodes. I've added cast to long int
5987 to get rid of the compiler warning.
5989 19. I had forgotten to lock out "/../" in configuration file names when
5990 ALT_CONFIG_PREFIX was set.
5992 20. Routers used for verification do not need to specify transports. However,
5993 if such a router generated a host list, and callout was configured, Exim
5994 crashed, because it could not find a port number from the (non-existent)
5995 transport. It now assumes port 25 in this circumstance.
5997 21. Added the -t option to exigrep.
5999 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6000 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6001 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6002 them is set, LOOKUP_LSEARCH is forced.
6004 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6006 24. Added sender and host information to the "rejected by local_scan()" log
6007 line; previously there was no indication of these.
6009 25. Added .include_if_exists.
6011 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6012 Linux. It turns out that not all file systems support this. Apparently some
6013 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6014 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6015 not supported on the file descriptor, is now ignored when Exim is trying to
6016 sync a directory. This applies only to Linux.
6018 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6020 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6021 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6024 29. Added support for maildirsize files from supplied patch (modified a bit).
6026 30. The use of :fail: followed by an empty string could lead Exim to respond to
6027 sender verification failures with (e.g.):
6029 550 Verification failed for <xxx>
6030 550 Sender verify failed
6032 where the first response line was missing the '-' that indicates it is not
6033 the final line of the response.
6035 31. The loop for finding the name of the user that called Exim had a hardwired
6036 limit of 10; it now uses the value of finduser_retries, which is used for
6037 all other user lookups.
6039 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6042 33. Exim was neglecting to zero errno before one call of strtol() when
6043 expanding a string and expecting an integer value. On some systems this
6044 resulted in spurious "integer overflow" errors. Also, it was casting the
6045 result into an int without checking.
6047 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6048 did not work. The code looks as if it has *never* worked, though it appears
6049 to have been documented since at least release 1.62. I have made it work.
6051 35. The "timeout_DNS" error in retry rules, also documented since at least
6052 1.62, also never worked. As it isn't clear exactly what this means, and
6053 clearly it isn't a major issue, I have abolished the feature by treating it
6054 as "timeout", and writing a warning to the main and panic logs.
6056 36. The display of retry rules for -brt wasn't always showing the error code
6059 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6060 timeout_connect_A, timeout_connect_MX.
6062 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6063 to the empty sender.
6065 39. The daemon was not analysing the content of -oX till after it had closed
6066 stderr and disconnected from the controlling terminal. This meant that any
6067 syntax errors were only noted on the panic log, and the return code from
6068 the command was 0. By re-arranging the code a little, I've made the
6069 decoding happen first, so such errors now appear on stderr, and the return
6070 code is 1. However, the actual setting up of the sockets still happens in
6071 the disconnected process, so errors there are still only recorded on the
6074 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6075 connections (as happens on some IP stacks) was logged at start up time as
6076 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6077 it from "IPv6 and IPv4", which means that two separate sockets are being
6080 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6081 says whether AF_INET or AF_INET6 was passed as an argument.
6083 42. Exiwhat output was messed up when time zones were included in log
6086 43. Exiwhat now gives more information about the daemon's listening ports,
6087 and whether -tls-on-connect was used.
6089 44. The "port" option of the smtp transport is now expanded.
6091 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6092 silently ignored. Now an error message is written to the main and panic
6095 46. There's a new ACL modifier called "logwrite" which writes to a log file
6096 as soon as it is encountered.
6098 47. Added $local_user_uid and $local_user_gid at routing time.
6100 48. Exim crashed when trying to verify a sender address that was being
6103 49. Exim was recognizing only a space character after ".include". It now also
6104 recognizes a tab character.
6106 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6107 extracting the relevant information from the specification. The man page no
6108 longer contains scrambled data for the -d option, and I've added a section
6109 at the front about calling Exim under different names.
6111 51. Added "extra_headers" argument to the "mail" command in filter files.
6113 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6116 53. Installed eximstats 1.29.
6118 54. Added transport_filter_timeout as a generic transport option.
6120 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6121 Cc: header lines. This was required by RFC 822, but it not required by RFC
6124 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6125 incoming messages that did not have them. Now it does so only if the
6126 message originates locally, that is, if there is no associated remote host
6127 address. When Resent- header lines are present, this applies to the Resent-
6128 lines rather than the non-Resent- lines.
6130 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6131 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6133 58. Messages for configuration errors now include the name of the main
6134 configuration file - useful now that there may be more than one file in a
6135 list (.included file names were always shown).
6137 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6138 for those rare installations that do not start the daemon as root or run it
6139 setuid root. I've cut out the call to initgroups() if the daemon is not
6142 60. The Exim user and group can now be bound into the binary as text strings
6143 that are looked up at the start of Exim's processing.
6145 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6147 62. Added $mailstore_basename variable.
6149 63. Installed patch to sieve.c from Michael Haardt.
6151 64. When Exim failed to open the panic log after failing to open the main log,
6152 the original message it was trying to log was written to stderr and debug
6153 output, but if they were not available (the usual case in production), it
6154 was lost. Now it is written to syslog before the two lines that record the
6155 failures to open the logs.
6157 65. Users' Exim filters run in subprocesses under the user's uid. It is
6158 possible for a "deliver" command or an alias in a "personal" command to
6159 provoke an address rewrite. If logging of address rewriting is configured,
6160 this fails because the process is not running as root or exim. There may be
6161 a better way of dealing with this, but for the moment (because 4.30 needs
6162 to be released), I have disabled address rewrite logging when running a
6163 filter in a non-root, non-exim process.
6169 1. The buildconfig auxiliary program wasn't quoting the value set for
6170 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6171 not defined. This bug was masked in 4.22 by the effect that was fixed in
6174 2. Some messages that were rejected after a message id was allocated were
6175 shown as "incomplete" by exigrep. It no longer does this for messages that
6176 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6178 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6179 have allow_domain_literals set, the ID did not get logged in the <= line.
6180 Domain literals are now always recognized in Message-ID: header lines.
6182 4. The first argument for a ${extract expansion item is the key name or field
6183 number. Leading and trailing spaces in this item were not being ignored,
6184 causing some misleading effects.
6186 5. When deliver_drop_privilege was set, single queue runner processes started
6187 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6188 same command in the process it spins off) were not dropping privilege.
6190 6. When the daemon running as "exim" started a queue runner, it always
6191 re-executed Exim in the spun-off process. This is a waste of effort when
6192 deliver_drop_privilege is set. The new process now just calls the
6193 queue-runner function directly.
6199 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6202 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6203 ignored. Though the use of -oP was forcing the writing of a pid file, it
6204 was always written to the default place.
6206 3. If the message "no IP address found for host xxxx" is generated during
6207 incoming verification, it is now followed by identification of the incoming
6208 connection (so you can more easily find what provoked it).
6210 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6212 5. Added some features to "harden" Exim a bit more against certain attacks:
6214 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6215 be put in Local/Makefile. This is like the never_users runtime option,
6216 but it cannot be overridden. The default setting is "root".
6218 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6219 prefix string with which any file named in a -C command line option
6222 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6223 is retained for -C and -D only if the caller of Exim is root. Without
6224 it, the exim user may also use -C and -D and retain privilege.
6226 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6227 command line option is disabled.
6229 6. Macro names set by the -D option must start with an upper case letter, just
6230 like macro names defined in the configuration file.
6232 7. Added "dereference=" facility to LDAP.
6234 8. Two instances of the typo "uknown" in the source files are fixed.
6236 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6237 the Configure-Makefile script screwed up while processing it.
6239 10. Incorporated PCRE 4.4.
6241 11. The SMTP synchronization check was not operating right at the start of an
6242 SMTP session. For example, it could not catch a HELO sent before the client
6243 waited for the greeting. There is now a check for outstanding input at the
6244 point when the greeting is written. Because of the duplex, asynchronous
6245 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6246 way, but not yet received, when the check is performed.
6248 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6249 on TCP/IP sockets, because this apparently causes some broken clients to
6252 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6253 unchanged) from the Cygwin maintainer.
6255 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6256 was supported instead of testing for mbx. Effectively a typo.
6258 15. The spa authenticator server code was not checking that the input it
6259 received was valid base64.
6261 16. The debug output line for the "set" modifier in ACLs was not showing the
6262 name of the variable that was being set.
6264 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6266 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6267 lookup on its own. Something else was needed to trigger the lookup. For
6268 example, a match in host_lookup or the need for a host name in a host list.
6269 Now, if $sender_host_name is referenced and the host name has not yet been
6270 looked up, a lookup is performed. If the lookup fails, the variable remains
6271 empty, and $host_lookup_failed is set to "1".
6273 19. Added "eqi" as a case-independent comparison operator.
6275 20. The saslauthd authentication condition could segfault if neither service
6276 nor realm was specified.
6278 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6279 error message that was logged was misleading, and incoming SMTP
6280 connections were dropped. The message is now more accurate, and temporary
6281 errors are given to SMTP connections.
6283 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6284 (except RSET) with a 421 error, until QUIT is received. However, it was
6285 failing to send a response to QUIT.
6287 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6288 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6289 ACL is now run after the helo_try_verify_hosts code.
6291 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6292 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6293 case-independent, so other case variants are also recognized). Apparently
6294 some systems use these upper case variants.
6296 25. If more than two messages were waiting for the same host, and a transport
6297 filter was specified for the transport, Exim sent two messages over the
6298 same TCP/IP connection, and then failed with "socket operation on non-
6299 socket" when it tried to send the third.
6301 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6303 27. The extern definition of crypt16() in expand.c was not being excluded when
6304 the OS had its own crypt16() function.
6306 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6307 as a preferred synonym for return_size_limit, both as an option and as an
6310 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6312 30. Changed the default configuration ACL to relax the local part checking rule
6313 for addresses that are not in any local domains. For these addresses,
6314 slashes and pipe symbols are allowed within local parts, but the sequence
6315 /../ is explicitly forbidden.
6317 31. SPA server authentication was not clearing the challenge buffer before
6320 32. log_message in a "warn" ACL statement was writing to the reject log as
6321 well as to the main log, which contradicts the documentation and doesn't
6322 seem right (because no rejection is happening). So I have stopped it.
6324 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6325 However, I am unable to do any testing of this.
6327 34. Fixed an infelicity in the appendfile transport. When checking directories
6328 for a mailbox, to see if any needed to be created, it was accidentally
6329 using path names with one or more superfluous leading slashes; tracing
6330 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6332 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6333 contents are added to the log line that is written for every discarded
6334 recipient. (Previously a log_message setting was ignored.)
6336 36. The ${quote: operator now quotes the string if it is empty.
6338 37. The install script runs exim in order to find its version number. If for
6339 some reason other than non-existence or emptiness, which it checks, it
6340 could not run './exim', it was installing it with an empty version number,
6341 i.e. as "exim-". This error state is now caught, and the installation is
6344 38. An argument was missing from the function that creates an error message
6345 when Exim fails to connect to the socket for saslauthd authentication.
6346 This could cause Exim to crash, or give a corrupted message.
6348 39. Added isip, isip4, and isip6 to ${if conditions.
6350 40. The ACL variables $acl_xx are now saved with the message, and can be
6351 accessed later in routers, transports, and filters.
6353 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6354 strings in the file are not string-expanded.
6356 42. If a MAIL command specified a SIZE value that was too large to fit into an
6357 int variable, the check against message_size_limit failed. Such values are
6358 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6359 day this will have to be increased, but I don't think I want to be around
6360 when emails are that large.
6367 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6368 iconv() is not standard in FreeBSD.
6370 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6371 IPv6 enabled. The observed symptom was a segmentation fault on return from
6372 the function os_common_find_running_interfaces() in src/os.c.
6374 3. In the check_special_case() function in daemon.c I had used "errno" as an
6375 argument name, which causes warnings on some systems. This was basically a
6376 typo, since it was named "eno" in the comments!
6378 4. The code that waits for the clock to tick (at a resolution of some fraction
6379 of a second) so as to ensure message-id uniqueness was always waiting for
6380 at least one whole tick, when it could have waited for less. [This is
6381 almost certainly not relevant at current processor speeds, where it is
6382 unlikely to ever wait at all. But we try to future-proof.]
6384 5. The function that sleeps for a time interval that includes fractions of a
6385 second contained a race. It did not block SIGALRM between setting the
6386 timer, and suspending (a couple of lines later). If the interval was short
6387 and the sigsuspend() was delayed until after it had expired, the suspension
6388 never ended. On busy systems this could lead to processes getting stuck for
6391 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6392 process, before it forks any delivery processes. The open lookup caching
6393 mechanism meant that the open file or database connection was passed into
6394 the delivery process. The problem was that delivery processes always tidy
6395 up cached lookup data. This could cause a problem for the next delivery
6396 process started by the queue runner, because the external queue runner
6397 process does not know about the closure. So the next delivery process
6398 still has data in the lookup cache. In the case of a file lookup, there was
6399 no problem because closing a file descriptor in a subprocess doesn't affect
6400 the parent. However, if the lookup was caching a connection to a database,
6401 the connection was closed, and the second delivery process was likely to
6402 see errors such as "PGSQL: query failed: server closed the connection
6403 unexpectedly". The problem has been fixed by closing all cached lookups
6404 in a queue runner before running a delivery process.
6406 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6407 seem to have the "const" qualifier which it has on other OS. I've
6410 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6411 *of the same type* (client or server) with the same public name that an
6412 error should be diagnosed.
6414 9. When Exim looked up a host name for an IP address, but failed to find the
6415 original IP address when looking up the host name (a safety check), it
6416 output the message "<ip address> does not match any IP for NULL", which was
6417 confusing, to say the least. The bug was that the host name should have
6418 appeared instead of "NULL".
6420 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6421 user that is built into the binary, and the -C or -D options is used, root
6422 privilege is dropped before the configuration file is read. In addition,
6423 logging is switched to stderr instead of the normal log files. If the
6424 configuration then re-defines the Exim user, the unprivileged environment
6425 is probably not what is expected, so Exim logs a panic warning message (but
6428 However, if deliver_drop_privilege is set, the unprivileged state may well
6429 be exactly what is intended, so the warning has been cut out in that case,
6430 and Exim is allowed to try to write to its normal log files.
6436 1. smtp_return_error_details was not giving details for temporary sender
6437 or receiver verification errors.
6439 2. Diagnose a configuration error if two authenticators have the same public
6442 3. Exim used not to create the message log file for a message until the first
6443 delivery attempt. This could be confusing when incoming messages were held
6444 for policy or load reasons. The message log file is now created at the time
6445 the message is received, and an initial "Received" line is written to it.
6447 4. The automatically generated man page for command line options had a minor
6448 bug that caused no ill effects; however, a more serious problem was that
6449 the procedure for building the man page automatically didn't always
6450 operate. Consequently, release 4.20 contains an out-of-date version. This
6451 shouldn't happen again.
6453 5. When building Exim with embedded Perl support, the script that builds the
6454 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6455 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6457 6. The freeze_tell option was not being used for messages that were frozen on
6458 arrival, either by an ACL or by local_scan().
6460 7. Added the smtp_incomplete_transaction log selector.
6462 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6463 was accepting AUTH without a new EHLO.
6465 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6466 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6469 10. Logging of TCP/IP connections (when configured) now happens in the main
6470 daemon process instead of the child process, so that the TCP/IP connection
6471 count is more accurate (but it can never be perfect).
6473 11. The use of "drop" in a nested ACL was not being handled correctly in the
6474 outer ACL. Now, if condition failure induced by the nested "drop" causes
6475 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6476 or "require"), the connection is dropped.
6478 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6479 that yield "discard" can now be used with an "accept" or a "discard" verb,
6480 but an error is generated for any others (because I can't see a useful way
6481 to define what should happen).
6483 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6484 are now processed in the same way as lines in the Exim configuration file.
6485 In particular, continuation lines are supported.
6487 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6489 15. Added -ti meaning -t -i.
6491 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6492 domains, and warn by logging if others are found.
6494 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6495 returned from GIFCONF when Exim is trying to find the list of interfaces on
6496 a host. The code in os.c has been modified to copy each ifreq to an aligned
6497 structure in all cases.
6499 Also, in some cases, the returned ifreq's were being copied to a 'struct
6500 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6501 means the last couple of bytes of an IPv6 address could be chopped if the
6502 ifreq contained only a normal sockaddr (14 bytes storage).
6504 18. Named domain lists were not supported in the hosts_treat_as_local option.
6505 An entry such as +xxxx was not recognized, and was treated as a literal
6508 19. Ensure that header lines added by a DATA ACL are included in the reject log
6509 if the ACL subsequently rejects the message.
6511 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6512 MD5 (which is deprecated).
6514 21. When testing a filter file using -bf, Exim was writing a message when it
6515 took the sender from a "From " line in the message, but it was not doing so
6516 when it took $return_path from a Return-Path: header line. It now does.
6518 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6519 with a valid header line field name (a series of printing characters
6520 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6522 23. Changed "disc" in the source to "disk" to conform to the documentation and
6523 the book and for uniformity.
6525 24. Ignore Sendmail's -Ooption=value command line item.
6527 25. When execve() failed while trying to run a command in a pipe transport,
6528 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6529 could be confused with a return value of 69 from the command itself. This
6530 has been changed to 127, the value the shell returns if it is asked to run
6531 a non-existent command. The wording for the related log line suggests a
6532 non-existent command as the problem.
6534 26. If received_header_text expands to an empty string, do not add a Received:
6535 header line to the message. (Well, it adds a token one on the spool, but
6536 marks it "old" so that it doesn't get used or transmitted.)
6538 27. Installed eximstats 1.28 (addition of -nt option).
6540 28. There was no check for failure on the call to getsockname() in the daemon
6541 code. This can fail if there is a shortage of resources on the system, with
6542 ENOMEM, for example. A temporary error is now given on failure.
6544 29. Contrary to the C standard, it seems that in some environments, the
6545 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6546 program. Exim now does this explicitly; it affects the formatting of
6547 timestamps using strftime().
6549 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6550 complaints. I've now initialized all the variables, to avoid this.
6552 32. Header lines added by a system filter were not being "seen" during
6553 transport-time rewrites.
6555 33. The info_callback() function passed to OpenSSL is set up with type void
6556 (*)(SSL *, int, int), as described somewhere. However, when calling the
6557 function (actually a macro) that sets it up, the type void(*)() is
6558 expected. I've put in a cast to prevent warnings from picky compilers.
6560 34. If a DNS black list lookup found a CNAME record, but there were no A
6561 records associated with the domain it pointed at, Exim crashed.
6563 35. If a DNS black list lookup returned more than one A record, Exim ignored
6564 all but the first. It now scans all returned addresses if a particular IP
6565 value is being sought. In this situation, the contents of the
6566 $dnslist_value variable are a list of all the addresses, separated by a
6569 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6570 to accept a host name and all its aliases if the forward lookup for any of
6571 them yielded the IP address of the incoming connection. Now it accepts only
6572 those names whose forward lookup yields the correct IP address. Any other
6573 names are discarded. This closes a loophole whereby a rogue DNS
6574 administrator could create reverse DNS records to break through a
6575 wildcarded host restriction in an ACL.
6577 37. If a user filter or a system filter that ran in a subprocess used any of
6578 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6579 the wrong values were passed to the pipe command ($thisaddress had the
6580 value of $0, $0 had the value of $1, etc). This bug was introduced by
6581 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6583 38. Improved the line breaking for long SMTP error messages from ACLs.
6584 Previously, if there was no break point between 40 and 75 characters, Exim
6585 left the rest of the message alone. Two changes have been made: (a) I've
6586 reduced the minimum length to 35 characters; (b) if it can't find a break
6587 point between 35 and 75 characters, it looks ahead and uses the first one
6588 that it finds. This may give the occasional overlong line, but at least the
6589 remaining text gets split now.
6591 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6592 file descriptors might be low, and that setting 1000 would always raise it.
6593 It turns out that in some environments, the limit is already over 1000 and
6594 that lowering it causes trouble. So now Exim takes care not to decrease it.
6596 40. When delivering a message, the value of $return_path is set to $sender_
6597 address at the start of routing (routers may change the value). By an
6598 oversight, this default was not being set up when an address was tested by
6599 -bt or -bv, which affected the outcome if any router or filter referred to
6602 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6603 log only when "message" or "log_message" are set. However, if one of the
6604 conditions was an address verification, or a call to a nested ACL, the
6605 messages generated by the underlying test were being passed through. This
6606 no longer happens. The underlying message is available in $acl_verify_
6607 message for both "message" and "log_message" expansions, so it can be
6608 passed through if needed.
6610 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6611 new expansion $bh_ to give the encoded byte string without charset
6612 translation. Translation happens only if iconv() is available; HAVE_ICONV
6613 indicates this at build time. HEADERS_CHARSET gives the charset to
6614 translate to; headers_charset can change it in the configuration, and
6615 "headers charset" can change it in an individual filter file.
6617 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6618 that creates RFC 2047 encoded "words" labels them as that charset instead
6619 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6620 expansion operator; (ii) when Exim creates a From: line for a local
6621 message; (iii) when a header line is rewritten to include a "phrase" part.
6623 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6624 buggy, causing it to skip the first lines of messages whose message ID
6625 ended in 'D'. This would not have bitten before Exim release 4.14, because
6626 message IDs were unlikely to end in 'D' before then. The effect was to have
6627 incorrect size information for certain domains.
6629 45. #include "config.h" was missing at the start of the crypt16.c module. This
6630 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6633 46. If there was a timeout during a "random" callout check, Exim treated it as
6634 a failure of the random address, and carried on sending RSET and the real
6635 address. If the delay was just some slowness somewhere, the response to the
6636 original RCPT would be taken as a response to RSET and so on, causing
6637 mayhem of various kinds.
6639 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
6640 when I implemented it. It didn't allow for the fact that some option values
6641 may legitimately be negative (e.g. size_addition), and it didn't even do
6642 the right test for positive values.
6644 48. Domain names in DNS records are case-independent. Exim always looks them up
6645 in lower case. Some resolvers return domain names in exactly the case they
6646 appear in the zone file, that is, they may contain uppercase letters. Not
6647 all resolvers do this - some return always lower case. Exim was treating a
6648 change of case by a resolver as a change of domain, similar to a widening
6649 of a domain abbreviation. This triggered its re-routing code and so it was
6650 trying to route what was effectively the same domain again. This normally
6651 caused routing to fail (because the router wouldn't handle the domain
6652 twice). Now Exim checks for this case specially, and just changes the
6653 casing of the domain that it ultimately uses when it transmits the message
6656 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
6659 50. If a filter generated a file delivery with a non-absolute name (possible if
6660 no home directory exists for the router), the forbid_file option was not
6663 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
6664 the existing equality matching.
6666 52. Exim was using ints instead of ino_t variables in some places where it was
6667 dealing with inode numbers.
6669 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
6670 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
6671 called TMPDIR, and if it finds it is different, it changes its value.
6673 54. The smtp_printf() function is now made available to local_scan() so
6674 additional output lines can be written before returning. There is also an
6675 smtp_fflush() function to enable the detection of a dropped connection.
6676 The variables smtp_input and smtp_batched_input are exported to
6679 55. Changed the default runtime configuration: the message "Unknown user"
6680 has been removed from the ACL, and instead placed on the localuser router,
6681 using the cannot_route_message feature. This means that any verification
6682 failures that generate their own messages won't get overridden. Similarly,
6683 the "Unrouteable address" message that was in the ACL for unverifiable
6684 relay addresses has also been removed.
6686 56. Added hosts_avoid_esmtp to the smtp transport.
6688 57. The exicyclog script was not checking for the esoteric option
6689 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
6690 will work only if exicyclog is run under the appropriate euid.
6692 58. Following a discussion on the list, the rules by which Exim recognises line
6693 endings on incoming messages have been changed. The -dropcr and drop_cr
6694 options are now no-ops, retained only for backwards compatibility. The
6695 following line terminators are recognized: LF CRLF CR. However, special
6696 processing applies to CR:
6698 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
6699 nor a local message in the state where . is a terminator.
6701 (ii) If a bare CR is encountered in a header line, an extra space is added
6702 after the line terminator so as not to end the header. The reasoning
6703 behind this is that bare CRs in header lines are most likely either
6704 to be mistakes, or people trying to play silly games.
6706 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
6707 was being incorrectly given as 18 bytes larger than it should have been.
6708 This is a VOB (very old bug).
6710 60. This may never have affected anything current, but just in case it has:
6711 When the local host is found other than at the start of a list of hosts,
6712 the local host, those with the same MX, and any that follow, are discarded.
6713 When the list in question was part of a longer list of hosts, the following
6714 hosts (not currently being processed) were also being discarded. This no
6715 longer happens. I'm not sure if this situation could ever has previously
6718 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6721 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6722 header. This is something that is recommended in a new Internet Draft, and
6723 is something that is documented as being done by Sendmail. There are two
6724 possible values. For messages generated by the autoreply transport, Exim
6727 Auto-Submitted: auto-replied
6729 whereas for all other generated messages (e.g. bounces) it adds
6731 Auto-Submitted: auto-generated
6733 63. The "personal" condition in filters now includes a test for the
6734 Auto-Submitted: header. If it contains the string "auto-" the message it
6735 not considered personal.
6737 64. Added rcpt_include_affixes as a generic transport option.
6739 65. Added queue_only_override (default true).
6741 66. Added the syslog_duplication option.
6743 67. If what should have been the first header line of a message consisted of
6744 a space followed by a colon, Exim was mis-interpreting it as a header line.
6745 It isn't of course - it is syntactically invalid and should therefore be
6746 treated as the start of the message body. The misbehaviour could have
6747 caused a number of strange effects, including loss of data in subsequent
6748 header lines, and spool format errors.
6750 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6751 client host had authenticated. This control can now be exercised by an ACL
6752 for more flexibility.
6754 69. By default, callouts do not happen when testing with -bh. There is now a
6755 variant, -bhc, which does actually run the callout code, including
6756 consulting and updating the callout cache.
6758 70. Added support for saslauthd authentication, courtesy of Alexander
6761 71. If statvfs() failed on the spool or log directories while checking their
6762 size for availability, Exim confusingly gave the error "space shortage".
6763 Furthermore, in debugging mode it crashed with a floating point exception.
6764 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6765 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6766 serious problem, Exim now writes to the main and panic logs when this
6767 happens, with details of the failure. It then refuses to accept the
6768 incoming message, giving the message "spool directory problem" or "log
6769 directory problem" with a 421 code for SMTP messages.
6771 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6772 0, 1, and 2 exist, because some OS complain for execs without them (see
6773 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6774 descriptors. However, the code omitted to check that the open succeeded,
6775 causing mysterious errors if for some reason the permissions on /dev/null
6776 got screwed. Now Exim writes a message to the main and panic logs, and
6777 bombs out if it can't open /dev/null.
6779 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6780 interact so that it is all more flexible. It is supposed to remain
6781 backwards compatible. Also added extra_local_interfaces.
6783 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6784 to bomb out with an assertion failure - to the client this appears as a
6785 connection drop. This problem occurs in the part of the code that was taken
6786 from the Samba project. Fortunately, the assertion is in a very simple
6787 function, so I have fixed this by reproducing the function inline in the
6788 one place where it is called, and arranging for authentication to fail
6789 instead of killing the process with assert().
6791 75. The SPA client code was not working when the server requested OEM rather
6792 than Unicode encoding.
6794 76. Added code to make require_files with a specific uid setting more usable in
6795 the case where statting the file as root fails - usually a non-root-mounted
6796 NFS file system. When this happens and the failure is EACCES, Exim now
6797 forks a subprocess and does the per-uid checking as the relevant uid.
6799 77. Added process_log_path.
6801 78. If log_file_path was not explicitly set, a setting of check_log_space or
6802 check_log_inodes was ignored.
6804 79. If a space check for the spool or log partitions fails, the incident is now
6805 logged. Of course, in the latter case the data may get lost...
6807 80. Added the %p formatting code to string_format() so that it can be used to
6808 print addresses in debug_print(). Adjusted all the address printing in the
6809 debugging in store.c to use %p rather than %d.
6811 81. There was a concern that a line of code in smtp_in.c could overflow a
6812 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6813 initially expressed, the concern was not well-founded, because trailing
6814 spaces are removed early. However, if the trailing spaces were followed by
6815 a NULL, they did not get removed, so the overflow was possible. Two fixes
6818 (a) I re-wrote the offending code in a cleaner fashion.
6819 (b) If an incoming SMTP command contains a NULL character, it is rejected
6822 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6823 runs initgroups(), so that if the Exim user is in any additional groups,
6824 they will be used during message reception.
6830 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob