1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
9 JH/01 Avoid costly startup code when not strictly needed. This reduces time
10 for some exim process initialisations. It does mean that the logging
11 of TLS configuration problems is only done for the daemon startup.
13 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
15 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
16 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
19 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
20 DKIM signing is being done. Previously a transport_filter would always
21 disable CHUNKING, falling back to traditional DATA.
23 JH/05 Regard command-line receipients as tainted.
25 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
27 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
28 PAM library frees one of the arguments given to it, despite the
29 documentation. Therefore a plain malloc must be used.
35 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
36 side, to decode a TLS 1.3 packet capture.
38 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
39 Previously the default library behaviour applied, sending two, each in
42 JH/03 Debug output for ACL now gives the config file name and line number for
45 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
47 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
49 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
50 buffer overrun for (non-chunking) other transports.
52 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
53 TLS1.3, means that a server rejecting a client certificate is not visible
54 to the client until the first read of encrypted data (typically the
55 response to EHLO). Add detection for that case and treat it as a failed
56 TLS connection attempt, so that the normal retry-in-clear can work (if
59 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
60 and/or domain. Found and fixed by Jason Betts.
62 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
63 configuration). If a CNAME target was not a wellformed name pattern, a
66 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
67 the OS reports them interleaved with other addresses.
69 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
70 used both for input and for a verify callout, both encrypted, SMTP
71 responses being sent by the server could be lost. This resulted in
72 dropped connections and sometimes bounces generated by a peer sending
75 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
76 string. Previously it was possible to cause undefined behaviour in a
77 library routine (usually a crash). Found by "zerons".
79 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
82 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
83 API was removed, so update to use the newer ones.
85 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
86 any timeout set, is taking a long time. Previously we would hang on to a
87 rotated logfile "forever" if the input was arriving with long gaps
88 (a previous attempt to fix addressed lack, for a long time, of initial
91 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
92 shared (NFS) environment. The length of the tempfile name is now
93 4 + 16 ("hdr.$message_exim_id") which might break on file
94 systems which restrict the file name length to lower values.
97 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
98 shared (NFS) environment.
100 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
101 did for all versions <4.90). Notably -M, -m, --invert, -I may be
104 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
105 on some platforms for bit 31.
107 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
108 to changes apparently associated with TLS1.3 handling some of the APIs
109 previously used were either nonfunctional or inappropriate. Strings
110 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
111 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
112 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
113 This affects log line X= elements, the $tls_{in,out}_cipher variables,
114 and the use of specific cipher names in the encrypted= ACL condition.
116 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
118 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
119 verification result was not updated unless hosts_require_ocsp applied.
121 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
122 queue_list_requires_admin set to false, non-admin users were denied the
125 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
126 directory-of-certs mode. Previously they were advertised despite the
129 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
130 A single TCP connection by a client will now hold a TLS connection open
131 for multiple message deliveries, by default. Previoud the default was to
134 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
135 default. If built with the facility, DANE will be used. The facility
136 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
138 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
139 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
140 must be defined and you must still, unless you define DISABLE_TLS, manage
141 the the include-dir and library-file requirements that go with that
142 choice. Non-TLS builds are still supported.
144 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
147 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
148 default. If the platform supports and has the facility enabled, it will
149 be requested on all coneections.
151 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
152 controlled by the build-time option SUPPORT_PIPE_CONNECT.
154 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
156 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
157 success-DSN messages. Previously the From: header was always the default
158 one for these; the option was ignored.
160 JH/28 Fix the timeout on smtp response to apply to the whole response.
161 Previously it was reset for every read, so a teergrubing peer sending
162 single bytes within the time limit could extend the connection for a
163 long time. Credit to Qualsys Security Advisory Team for the discovery.
165 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
166 delivery address, which leaked information of the results of local
167 forwarding. Change to the original envelope recipient address, per
170 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
171 requested. Previously not bounce was generated and a log entry of
172 error ignored was made.
174 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
176 JH/32 Introduce a general tainting mechanism for values read from the input
177 channel, and values derived from them. Refuse to expand any tainted
178 values, to catch one form of exploit.
180 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
181 was unused and the unexpanded text used for the test. Found and
182 fixed by Ruben Jenster.
184 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
185 an attempt to use a TLS library read routine dereffed a nul pointer,
188 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
189 them in our smtp response.
191 JH/36 Have the general router option retry_use_local_part default to true when
192 any of the restrictive preconditions are set (to anything). Previously it
193 was only for check_local user. The change removes one item of manual
194 configuration which is required for proper retries when a remote router
195 handles a subset of addresses for a domain.
197 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
198 link count into consideration.
200 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
201 caused the extension of big_buffer, the following lines were ignored.
203 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
204 accordance with RFC 2308. Previously there was no expiry, so a longlived
205 receive process (eg. due to ACL delays) versus a short SOA value could
208 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
210 JH/39 Promote DMARC support to mainline.
212 JH/40 Bug 2452: Add a References: header to DSNs.
214 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
215 parameters. The relevant library call is documented as "Deprecated: This
216 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
217 3.6.0, DH parameters are negotiated following RFC7919."
219 HS/06 Change the default of dnssec_request_domains to "*"
221 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
222 carried on and emitted a BDAT command, even when PIPELINING was not
225 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
226 buffer was used for the filename, resulting in a trap when tainted
227 arguments (eg. $domain) were used.
229 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
230 recommended to avoid a possible server-load attack. The feature can be
231 re-enabled via the openssl_options main cofiguration option.
233 JH/45 local_scan API: documented the current smtp_printf() call. This changed
234 for version 4.90 - adding a "more data" boolean to the arguments.
235 Bumped the ABI version number also, this having been missed previously;
236 release versions 4.90 to 4.92.3 inclusive were effectively broken in
237 respect of usage of smtp_printf() by either local_scan code or libraries
238 accessed via the ${dlfunc } expansion item. Both will need coding
239 adjustment for any calls to smtp_printf() to match the new function
240 signature; a FALSE value for the new argument is always safe.
242 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
243 the file-offset (which the Linux syscall does, and exim expects); this
244 resulted in an indefinite loop.
246 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
247 to do ARC verification. The Authentication-Results: header line added
248 by the configuration then had no ARC item.
254 JH/01 Remove code calling the customisable local_scan function, unless a new
255 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
257 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
258 non-signal-safe functions being used.
260 JH/03 Bug 2269: When presented with a received message having a stupidly large
261 number of DKIM-Signature headers, disable DKIM verification to avoid
262 a resource-consumption attack. The limit is set at twenty.
264 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
265 report of oldest_pass in ${authres } in consequence, and separate out
266 some descriptions of reasons for verification fail.
268 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
269 files in the spool were present and unlocked. A queue-runner could spot
270 them, resulting in a duplicate delivery. Fix that by doing the unlock
271 after the unlink. Investigation by Tim Stewart. Take the opportunity to
272 add more error-checking on spoolfile handling while that code is being
275 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
276 No known attacks, no CVE, this is defensive hardening.
278 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
279 a queue-runner could start a delivery while other operations were ongoing.
280 Cutthrough delivery was a common victim, resulting in duplicate delivery.
281 Found and investigated by Tim Stewart. Fix by using the open message data
282 file handle rather than opening another, and not locally closing it (which
283 releases a lock) for that case, while creating the temporary .eml format
284 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
286 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
287 $sender_verify_failure/$recipient_verify_failure to "random".
289 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
292 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
293 Previously this would segfault.
295 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
298 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
299 like zero, since the resolver should be doing this for us, But we need one
300 as a CNAME but no MX presence gets the CNAME returned; we need to check
301 that doesn't point to an MX to declare it "no MX returned" rather than
302 "error, loop". A new main option is added so the older capability of
303 following some limited number of chain links is maintained.
305 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
307 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
308 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
309 now-deprecated earlier definitions used only specified the range up to TLS
310 1.2 (in the older-version library docs).
312 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
314 JH/15 Rework TLS client-side context management. Stop using a global, and
315 explicitly pass a context around. This enables future use of TLS for
316 connections to service-daemons (eg. malware scanning) while a client smtp
317 connection is using TLS; with cutthrough connections this is quite likely.
319 JH/16 Fix ARC verification to do AS checks in reverse order.
321 JH/17 Support a "tls" option on the ${readsocket } expansion item.
323 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
324 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
325 Previously the "utf8" would be re-prepended for every additional message.
327 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
328 Previously thery were accepted, resulting in issues when attempting to
329 forward messages to a non-supporting MTA.
331 PP/02 Let -n work with printing macros too, not just options.
333 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
334 one parent address was copied, and bogus data was used at delivery-logging
335 time. Either a crash (after delivery) or bogus log data could result.
336 Discovery and analysis by Tim Stewart.
338 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
339 Previously if the string ended mid-character, we did not insert the
340 promised '?' replacement.
342 PP/04 Documentation: current string operators work on bytes, not codepoints.
344 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
345 should pack well giving a smaller memory footprint so better caching and
346 therefore performance. Group the declarations where this can't be done so
347 that the byte-sized flag variables are not interspersed among pointer
348 variables, giving a better chance of good packing by the compiler.
350 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
351 non-null, to avoid issues with sites running BATV. Previously reports were
352 sent with an empty envelope sender so looked like bounces.
354 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
355 The ignore_error flag wasn't being returned from the filter subprocess so
356 was not set for later routers. Investigation and fix by Matthias Kurz.
358 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
359 and a msg:complete for the whole, when a message is manually removed using
360 -Mrm. Developement by Matthias Kurz, hacked on by JH.
362 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
363 a "Gnu special" function, asprintf() in the DB utility binary builds; I
364 hope that is portable enough.
366 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
367 requiring a known-CA anchor certificate; make it now rely entirely on the
368 TLSA as an anchor. Checking the name on the leaf cert against the name
369 on the A-record for the host is still done for TA (but not for EE mode).
371 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
372 included in delivery lines for non-proxied connections, when compiled with
373 SUPPORT_SOCKS and running with proxy logging enabled.
375 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
376 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
377 move the existing event to fire before the normal logging of message
378 failure so that custom logging is bracketed by normal logging.
380 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
381 msg:fail:internal event. Developement by Matthias Kurz.
383 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
384 far too small for todays use of crypto signatures stored there. Go all
385 the way to the max DNS message size of 64kB, even though this might be
386 overmuch for IOT constrained device use.
388 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
389 copy a string over itself. The library routine is documented as not
390 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
392 JH/32 For main options check_spool_space and check_inode_space, where the
393 platform supports 64b integers, support more than the previous 2^31 kB
394 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
395 the previous G, M, k.
397 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
398 $authenticated_fail_id variable on authentication failure. Previously
401 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
402 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
403 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
404 GNUTLS_SEC_PARAM_MEDIUM.
406 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
407 side. Previously we would continue as if no SNI had been received.
409 JH/36 Harden the handling of string-lists. When a list consisted of a sole
410 "<" character, which should be a list-separator specification, we walked
411 off past the nul-terimation.
413 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
414 causes) even when the retry time is not yet met. Previously they were
415 not, meaning that when (say) an account was over-quota and temp-rejecting,
416 and multiple senders' messages were queued, only one sender would get
417 notified on each configured delay_warning cycle.
419 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
421 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
422 cipher-suites, an error can be left on the stack even for a succeeding
423 accept; this results in impossible error messages when a later operation
426 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
427 return error codes indicating retry. Under TLS1.3 this becomes required.
429 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
430 it only wrote the new authenticators, resulting in a lack of tracking of
431 peer changes of ESMTP extensions until the next cache flush.
433 JH/41 Fix the loop reading a message header line to check for integer overflow,
434 and more-often against header_maxsize. Previously a crafted message could
435 induce a crash of the recive process; now the message is cleanly rejected.
437 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
438 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
444 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
445 When redis_servers is set to a list of > 1 element, and the Redis servers
446 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
447 case of MOVED into a DEFER case instead, thus moving the query onto the
448 next server in the list. For a cluster of N elements, all N servers must
449 be defined in redis_servers.
451 GF/02 Catch and remove uninitialized value warning in exiqsumm
452 Check for existence of @ARGV before looking at $ARGV[0]
454 JH/01 Replace the store_release() internal interface with store_newblock(),
455 which internalises the check required to safely use the old one, plus
456 the allocate and data copy operations duplicated in both (!) of the
457 extant use locations.
459 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
460 modifier. This matches the restriction on the commandline.
462 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
463 Previously only the last row was returned.
465 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
466 we assumed that tags in the header were well-formed, and parsed the
467 element content after inspecting only the first char of the tag.
468 Assumptions at that stage could crash the receive process on malformed
471 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
472 While running the DKIM ACL we operate on the Permanent memory pool so that
473 variables created with "set" persist to the DATA ACL. Also (at any time)
474 DNS lookups that fail create cache records using the Permanent pool. But
475 expansions release any allocations made on the current pool - so a dnsdb
476 lookup expansion done in the DKIM ACL releases the memory used for the
477 DNS negative-cache, and bad things result. Solution is to switch to the
478 Main pool for expansions.
479 While we're in that code, add checks on the DNS cache during store_reset,
480 active in the testsuite.
481 Problem spotted, and debugging aided, by Wolfgang Breyha.
483 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
484 When none of the hosts presented to a transport match an already-open
485 connection, close it and proceed with the list. Previously we would
486 queue the message. Spotted by Lena with Yahoo, probably involving
489 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
490 Previously a spurious "250 OK id=" response was appended to the proper
493 JH/08 The "support for" informational output now, which built with Content
494 Scanning support, has a line for the malware scanner interfaces compiled
495 in. Interface can be individually included or not at build time.
497 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
498 by the template makefile "src/EDITME". The "STREAM" support for an older
499 ClamAV interface method is removed.
501 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
502 rows affected is given instead).
504 JH/11 The runtime Berkeley DB library version is now additionally output by
505 "exim -d -bV". Previously only the compile-time version was shown.
507 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
508 SMTP connection. Previously, when one had more receipients than the
509 first, an abortive onward connection was made. Move to full support for
510 multiple onward connections in sequence, handling cutthrough connection
511 for all multi-message initiating connections.
513 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
514 routers. Previously, a multi-recipient message would fail to match the
515 onward-connection opened for the first recipient, and cause its closure.
517 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
518 a timeout on read on a GnuTLS initiating connection, resulting in the
519 initiating connection being dropped. This mattered most when the callout
520 was marked defer_ok. Fix to keep the two timeout-detection methods
523 JH/15 Relax results from ACL control request to enable cutthrough, in
524 unsupported situations, from error to silently (except under debug)
525 ignoring. This covers use with PRDR, frozen messages, queue-only and
528 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
530 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
531 metadata, resulting in a crash in free().
533 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
534 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
535 Broken also in d185889f4, with init system revamp.
537 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
538 Previously we abruptly closed the connection after reading a malware-
539 found indication; now we go on to read the "scan ok" response line,
542 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
543 ACL. Previously, a crash would result.
545 JH/19 Speed up macro lookups during configuration file read, by skipping non-
546 macro text after a replacement (previously it was only once per line) and
547 by skipping builtin macros when searching for an uppercase lead character.
549 JH/20 DANE support moved from Experimental to mainline. The Makefile control
550 for the build is renamed.
552 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
553 was allocated for every new TLS startup, meaning one per message. Fix
554 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
556 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
557 reported the original. Fix to report (as far as possible) the ACL
558 result replacing the original.
560 JH/23 Fix memory leak during multi-message connections using STARTTLS under
561 OpenSSL. Certificate information is loaded for every new TLS startup,
562 and the resources needed to be freed.
564 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
566 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
569 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
570 DATA response info to the (existing) per-recipient response info for
571 the "C=" log element. It can have useful tracking info from the
572 destination system. Patch from Simon Arlott.
574 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
575 length value. Previously this would segfault.
577 HS/02 Support Avast multiline protoocol, this allows passing flags to
578 newer versions of the scanner.
580 JH/28 Ensure that variables possibly set during message acceptance are marked
581 dead before release of memory in the daemon loop. This stops complaints
582 about them when the debug_store option is enabled. Discovered specifically
583 for sender_rate_period, but applies to a whole set of variables.
584 Do the same for the queue-runner and queue-list loops, for variables set
585 from spool message files. Do the same for the SMTP per-message loop, for
586 certain variables indirectly set in ACL operations.
588 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
589 as a multi-recipient message from a mailinglist manager). The coding had
590 an arbitrary cutoff number of characters while checking for more input;
591 enforced by writing a NUL into the buffer. This corrupted long / fast
592 input. The problem was exposed more widely when more pipelineing of SMTP
593 responses was introduced, and one Exim system was feeding another.
594 The symptom is log complaints of SMTP syntax error (NUL chars) on the
595 receiving system, and refused recipients seen by the sending system
596 (propating to people being dropped from mailing lists).
597 Discovered and pinpointed by David Carter.
599 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
600 replaced by the ${authresults } expansion.
602 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
604 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
605 allows proper process termination in container environments.
607 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
608 Previously the "final dot" had a newline after it; ensure it is CR,LF.
610 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
611 and "err_perm", deprecated since 4.83 when the RFC-defined words
612 "temperror" and "permerror" were introduced.
614 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
615 transport-filters or DKIM-signing. The restriction was lost in the
616 consolidation of verify-callout and delivery SMTP handling.
617 Extend the restriction to also cover ARC-signing.
619 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
620 in defer=pass mode supply a 450 to the initiator. Previously the message
623 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
624 tls_require_ciphers is used as before.
626 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
627 "pass_unscanned". Only tmpfails from the scanner are written to
628 the paniclog, as they may require admin intervention (permission
629 denied, license issues). Other scanner errors (like decompression
630 bombs) do not cause a paniclog entry.
632 JH/36 Fix reinitialisation of DKIM logging variable between messages.
633 Previously it was possible to log spurious information in receive log
636 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
637 triggered odd behaviour from Outlook Express clients.
639 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
642 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
643 since the IETF WG has not yet settled on that versus the original
644 "bare" representation.
646 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
647 Previously the millisecond value corrupted the output.
648 Fix also for syslog_pid=no and log_selector +pid, for which the pid
649 corrupted the output.
655 JH/01 Rework error string handling in TLS interface so that the caller in
656 more cases is responsible for logging. This permits library-sourced
657 string to be attached to addresses during delivery, and collapses
658 pairs of long lines into single ones.
660 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
661 during configuration. Wildcards are allowed and expanded.
663 JH/02 Rework error string handling in DKIM to pass more info back to callers.
664 This permits better logging.
666 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
667 do not close it down and have the child transport start it up again on
668 the passed-on TCP connection. Instead, proxy the child (and any
669 subsequent ones) for TLS via a unix-domain socket channel. Logging is
670 affected: the continued delivery log lines do not have any DNSSEC, TLS
671 Certificate or OCSP information. TLS cipher information is still logged.
673 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
674 identical IP addresses on different listening ports. Will also affect
677 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
678 add noisy ifdef guards to special-case this sillyness.
679 Patch from Bernd Kuhls.
681 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
682 than 255 are no longer allowed.
684 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
685 Disable the session-cache too, which might reduce our load. Since we
686 currrectly use a new context for every connection, both as server and
687 client, there is no benefit for these.
688 GnuTLS appears to not support tickets server-side by default (we don't
689 call gnutls_session_ticket_enable_server()) but client side is enabled
690 by default on recent versions (3.1.3 +) unless the PFS priority string
693 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
694 <https://reproducible-builds.org/specs/source-date-epoch/>.
696 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
697 the check for any unsuccessful recipients did not notice the limit, and
698 erroneously found still-pending ones.
700 JH/08 Pipeline CHUNKING command and data together, on kernels that support
701 MSG_MORE. Only in-clear (not on TLS connections).
703 JH/09 Avoid using a temporary file during transport using dkim. Unless a
704 transport-filter is involved we can buffer the headers in memory for
705 creating the signature, and read the spool data file once for the
706 signature and again for transmission.
708 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
709 4.77 as the kernel support then wasn't solid, having issues in 64bit
710 mode. Now, it's been long enough. Add support for FreeBSD also.
712 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
713 case where the routing stage had gathered several addresses to send to
714 a host before calling the transport for the first, we previously failed
715 to close down TLS in the old transport process before passing the TCP
716 connection to the new process. The new one sent a STARTTLS command
717 which naturally failed, giving a failed delivery and bloating the retry
718 database. Investigation and fix prototype from Wolfgang Breyha.
720 JH/12 Fix check on SMTP command input synchronisation. Previously there were
721 false-negatives in the check that the sender had not preempted a response
722 or prompt from Exim (running as a server), due to that code's lack of
723 awareness of the SMTP input buffering.
725 PP/04 Add commandline_checks_require_admin option.
726 Exim drops privileges sanely, various checks such as -be aren't a
727 security problem, as long as you trust local users with access to their
728 own account. When invoked by services which pass untrusted data to
729 Exim, this might be an issue. Set this option in main configuration
730 AND make fixes to the calling application, such as using `--` to stop
733 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
734 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
735 responses to those, into a single TLS record each way (this usually means
736 a single packet). As a side issue, smtp_enforce_sync now works on TLS
739 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
740 affects you only if you're dancing at the edge of the param size limits.
741 If you are, and this message makes sense to you, then: raise the
742 configured limit or use OpenSSL 1.1. Nothing we can do for older
745 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
746 cmdline element to get the documented default one. Previously it was
749 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
750 are unsuable for non-message-specific reasons - eg. connection timeout,
751 banner-time rejection.
753 JH/16 Fix logging of delivery remote port, when specified by router, under
756 PP/06 Repair manualroute's ability to take options in any order, even if one
757 is the name of a transport.
760 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
762 JH/17 Change the list-building routines interface to use the expanding-string
763 triplet model, for better allocation and copying behaviour.
765 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
766 Previously it was constructed the first time a possibly-matching string
767 was met in the configuration file input during startup; now it is done
770 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
771 compatible one, to avoid the (poorly documented) possibility of a config
772 file in the working directory redirecting the DB files, possibly correpting
773 some existing file. CVE-2017-10140 assigned for BDB.
775 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
776 cache-hot. Previously, although the result was properly cached, the
777 initial verify call returned a defer.
779 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
780 the main verify for receipient in uncached-mode.
782 JH/22 Retire historical build files to an "unsupported" subdir. These are
783 defined as "ones for which we have no current evidence of testing".
785 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
786 if present. Previously it was ignored.
788 JH/24 Start using specified-initialisers in C structure init coding. This is
789 a C99 feature (it's 2017, so now considered safe).
791 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
792 if was a fixed-sized field and bitmask ops via macros; it is now more
795 PP/07 GitHub PR 56: Apply MariaDB build fix.
796 Patch provided by Jaroslav Å karvada.
798 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
799 during Coverity cleanups [4.87 JH/47]
800 Diagnosis and fix provided by Michael Fischer v. Mollard.
802 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
803 the right size to place the terminating semicolon on its own folded
804 line, the header hash was calculated to an incorrect value thanks to
805 the (relaxed) space the fold became.
807 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
808 and confused the parent.
810 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
811 which could crash as a result. This could lead to undeliverable messages.
813 JH/28 Logging: "next input sent too soon" now shows where input was truncated
816 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
817 matters on fast-turnover and PID-randomising systems, which were getting
818 out-of-order delivery.
820 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
821 a possibly-overlapping copy. The symptom was that "Remote host closed
822 connection in response to HELO" was logged instead of the actual 4xx
825 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
826 Previously only that bufferd was discarded, resulting in SYMTP command
829 JH/32 DKIM: when a message has multiple signatures matching an identity given
830 in dkim_verify_signers, run the dkim acl once for each. Previously only
831 one run was done. Bug 2189.
833 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
834 "panic the current process" to "deliberately defer". The panic log is
835 still written with the problem list name; the mail and reject logs now
836 get a temp-reject line for the message that was being handled, saying
837 something like "domains check lookup or other defer". The SMTP 451
838 message is still "Temporary local problem".
840 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
841 A crafted sequence of BDAT commands could result in in-use memory beeing
842 freed. CVE-2017-16943.
844 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
845 from SMTP input. Previously it was always done; now only done for DATA
846 and not BDAT commands. CVE-2017-16944.
848 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
849 to the message (such as an overlong header line). Previously this was
850 not done and we did not exit BDAT mode. Followon from the previous item
851 though a different problem.
857 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
858 than -2003 did; needs libidn2 in addition to libidn.
860 JH/02 The path option on a pipe transport is now expanded before use.
862 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
863 Patch provided by "Björn", documentation fix added too.
865 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
866 missing a wire-to-host endian conversion.
868 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
869 close after a BDAT command line could be taken as a following command,
870 giving a synch failure. Fix by only checking for synch immediately
871 before acknowledging the chunk.
873 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
874 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
875 macro. Patches provided by Josh Soref.
877 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
878 Previously we did not; the RFC seems ambiguous and VRFY is not listed
879 by IANA as a service extension. However, John Klensin suggests that we
882 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
883 the dkim code may be unix-mode line endings rather than smtp wire-format
884 CRLF, so prepend a CR to any bare LF.
886 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
887 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
889 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
890 the first were themselves being wrongly included in the feed into dkim
891 processing; with most chunk sizes in use this resulted in an incorrect
892 body hash calculated value.
894 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
895 DKIM signature block, for verification. Although advised against by
896 standards it is specifically not ruled illegal.
898 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
900 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
901 missing a body hash (the bh= tag).
903 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
904 It seems that HAProxy sends the Proxy Protocol information in clear and
905 only then does a TLS startup, so do the same.
907 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
908 TCP connections (such as for Spamd) unless the daemon successfully set
909 Fast Open mode on its listening sockets. This fixes breakage seen on
910 too-old kernels or those not configured for Fast Open, at the cost of
911 requiring both directions being enabled for TFO, and TFO never being used
912 by non-daemon-related Exim processes.
914 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
915 endings, at least on the first header line. Try to canonify any that get
916 past that check, despite the cost.
918 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
919 now limited to an arbitrary five deep, while parsing addresses with the
920 strip_excess_angle_brackets option enabled.
922 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
923 instead leave the unprompted TLS handshake in socket buffer for the
924 TLS library to consume.
926 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
928 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
930 JH/16 Drop variables when they go out of scope. Memory management drops a whole
931 region in one operation, for speed, and this leaves assigned pointers
932 dangling. Add checks run only under the testsuite which checks all
933 variables at a store-reset and panics on a dangling pointer; add code
934 explicitly nulling out all the variables discovered. Fixes one known
935 bug: a transport crash, where a dangling pointer for $sending_ip_address
936 originally assigned in a verify callout, is re-used.
938 PP/06 Drop '.' from @INC in various Perl scripts.
940 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
942 PP/08 Reduce a number of compilation warnings under clang; building with
943 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
944 should be warning-free.
946 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
948 HS/01 Fix portability problems introduced by PP/08 for platforms where
949 realloc(NULL) is not equivalent to malloc() [SunOS et al].
951 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
952 chunk. This allows us to accept broken chunked messages. We need a more
953 general solution here.
955 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
956 already-broken messages in the queue.
958 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
960 JH/19 Fix reference counting bug in routing-generated-address tracking.
966 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
967 supports it and a size is available (ie. the sending peer gave us one).
969 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
970 years of being deprecated). The replacements are the ACLs
971 acl_smtp_mime and acl_not_smtp_mime.
973 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
974 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
975 or even an in-clear connection were permitted. Now, if the host lookup
976 was dnssec and dane was requested then the host is only used if the
977 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
978 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
979 if one fails this test.
980 This means that a poorly-configured remote DNS will make it incommunicado;
981 but it protects against a DNS-interception attack on it.
983 JH/04 Bug 1810: make continued-use of an open smtp transport connection
984 non-noisy when a race steals the message being considered.
986 JH/05 If main configuration option tls_certificate is unset, generate a
987 self-signed certificate for inbound TLS connections.
989 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
990 in rewrites and routers.
992 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
993 and logged a warning sing 4.83; now they are a configuration file error.
995 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
996 (lacking @domain). Apply the same qualification processing as RCPT.
998 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1000 JH/10 Support ${sha256:} applied to a string (as well as the previous
1003 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1004 a cutthrough deliver is pending, as we always want to make a connection.
1005 This also avoids re-routing the message when later placing the cutthrough
1006 connection after a verify cache hit.
1007 Do not update it with the verify result either.
1009 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1010 when routing results in more than one destination address.
1012 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1013 signing (which inhibits the cutthrough capability). Previously only
1014 the presence of an option was tested; now an expansion evaluating as
1015 empty is permissible (obviously it should depend only on data available
1016 when the cutthrough connection is made).
1018 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1019 the relevant preceding SMTP command did not note the pipelining mode.
1021 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1022 Previously they were not counted.
1024 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1025 as one having no matching records. Previously we deferred the message
1026 that needed the lookup.
1028 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1029 distinguished as "(=".
1031 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1032 for missing MX records. Previously it only worked for missing A records.
1034 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1036 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1037 after the data-go-ahead and data-ack. Patch from Jason Betts.
1039 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1040 even for a "none" policy. Patch from Tony Meyer.
1042 JH/22 Fix continued use of a connection for further deliveries. If a port was
1043 specified by a router, it must also match for the delivery to be
1046 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1047 When one of the recipients of a message was unsuitable for the connection
1048 (has no matching addresses), we lost track of needing to mark it
1049 deferred. As a result mail would be lost.
1051 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1053 JH/25 Decoding ACL controls is now done using a binary search; the source code
1054 takes up less space and should be simpler to maintain. Merge the ACL
1055 condition decode tables also, with similar effect.
1057 JH/26 Fix problem with one_time used on a redirect router which returned the
1058 parent address unchanged. A retry would see the parent address marked as
1059 delivered, so not attempt the (identical) child. As a result mail would
1062 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1063 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1064 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1067 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1068 Main config options check_{log,spool}_{inodes,space} are now
1069 100 inodes, 10MB unless set otherwise in the configuration.
1071 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1072 Previously it only applied to the main-section connection policy
1075 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1077 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1078 by me. Added RFC7919 DH primes as an alternative.
1080 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1081 are not in the system include path.
1083 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1084 GnuTLS, when a session startup failed (eg because the client disconnected)
1085 Exim did stdio operations after fclose. This was exposed by a recent
1086 change which nulled out the file handle after the fclose.
1088 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1089 signed directly by the cert-signing cert, rather than an intermediate
1090 OCSP-signing cert. This is the model used by LetsEncrypt.
1092 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1094 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1095 an incoming connection.
1097 HS/02 Bug 1802: Do not half-close the connection after sending a request
1100 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1101 fallback to "prime256v1".
1103 JH/34 SECURITY: Use proper copy of DATA command in error message.
1104 Could leak key material. Remotely exploitable. CVE-2016-9963.
1110 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1111 and 3.4.4 - once the server is enabled to respond to an OCSP request
1112 it does even when not requested, resulting in a stapling non-aware
1113 client dropping the TLS connection.
1115 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1116 support variable-length bit vectors. No functional change.
1118 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1119 The I= interface field on outgoing lines is now after the H= remote
1120 host field, same as incoming lines. There is a separate
1121 outgoing_interface log selector which allows you to disable the
1124 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1125 If not running log_selector +smtp_connection the mainlog would be held
1126 open indefinitely after a "too many connections" event, including to a
1127 deleted file after a log rotate. Leave the per net connection logging
1128 leaving it open for efficiency as that will be quickly detected by the
1129 check on the next write.
1131 HS/01 Bug 1671: Fix post transport crash.
1132 Processing the wait-<transport> messages could crash the delivery
1133 process if the message IDs didn't exist for some reason. When
1134 using 'split_spool_directory=yes' the construction of the spool
1135 file name failed already, exposing the same netto behaviour.
1137 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1138 mime_regex ACL conditions.
1140 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1141 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1142 to HELO, local diagnostic string.
1144 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1145 log line to debug. Even when configured with a tls authenticator many
1146 client connections are expected to not authenticate in this way, so
1147 an authenticate fail is not an error.
1149 HS/02 Add the Exim version string to the process info. This way exiwhat
1150 gives some more detail about the running daemon.
1152 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1153 matter for fast-change records such as DNSBLs.
1155 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1156 retry record, even if constant. There may be multiple transports with
1157 different interface settings and the retry behaviour needs to be kept
1160 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1162 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1164 JH/10 Bug 840: fix log_defer_output option of pipe transport
1166 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1167 hosts_randomize. This matters a lot when combined with mua_wrapper.
1169 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1170 ${quote_pgsql:<string>} operator.
1172 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1174 JH/14 Change header file name for freeradius-client. Relevant if compiling
1175 with Radius support; from the Gentoo tree and checked under Fedora.
1177 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1179 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1180 option transport_filter, meaning no filtering.
1182 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1184 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1185 defaults to "*" (all hosts). The variable is now available when not built
1186 with TLS, default unset, mainly to enable keeping the testsuite sane.
1187 If a server certificate is not supplied (via tls_certificate) an error is
1188 logged, and clients will find TLS connections fail on startup. Presumably
1189 they will retry in-clear.
1190 Packagers of Exim are strongly encouraged to create a server certificate
1191 at installation time.
1193 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1194 with the $config_file variable.
1196 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1197 in transport context, after the attempt, and per-recipient. The latter type
1198 is per host attempted. The event data is the error message, and the errno
1199 information encodes the lookup type (A vs. MX) used for the (first) host,
1200 and the trailing two digits of the smtp 4xx response.
1202 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1203 to write to mainlog (or rejectlog, paniclog) in the window between file
1204 creation and permissions/ownership being changed. Particularly affects
1205 installations where exicyclog is run as root, rather than exim user;
1206 result is that the running daemon panics and dies.
1208 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1210 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1211 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1212 "pri" and "weight". Note that the previous implicit priority given by the
1213 list order is no longer honoured.
1215 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1216 for DKIM processing.
1218 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1219 by defining SUPPORT_SOCKS.
1221 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1222 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1223 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1224 variables are renamed to proxy_{local,external}_{address,port}.
1226 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1227 for a build by defining SUPPORT_I18N
1229 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1230 of the query string, and make ${quote_redis:} do that quoting.
1232 JH/29 Move Events support from Experimental to mainline, enabled by default
1233 and removable for a build by defining DISABLE_EVENT.
1235 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1237 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1238 cached by the daemon.
1240 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1241 by defining LOOKUP_REDIS. The libhiredis library is required.
1243 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1244 keys are given for lookup.
1246 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1247 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1248 only supported when built with TLS support. The PolarSSL SHA routines
1249 are still used when the TLS library is too old for convenient support.
1251 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1252 openssl_options), for security. OpenSSL forces this from version 1.1.0
1253 server-side so match that on older versions.
1255 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1256 allocation for $value could be released as the expansion processing
1257 concluded, but leaving the global pointer active for it.
1259 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1260 and to use the domains and local_parts ACL conditions.
1262 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1263 incorrectly not doubled on cutthrough transmission, hence seen as a
1264 body-termination at the receiving system - resulting in truncated mails.
1265 Commonly the sender saw a TCP-level error, and retransmitted the message
1266 via the normal store-and-forward channel. This could result in duplicates
1267 received - but deduplicating mailstores were liable to retain only the
1268 initial truncated version.
1270 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1272 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1274 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1275 we're in there, support oversigning also; bug 1309.
1277 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1279 HS/04 Add support for keep_environment and add_environment options.
1281 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1282 either intentional arithmetic overflow during PRNG, or testing config-
1285 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1286 delivery resulted in actual delivery. Cancel cutthrough before DATA
1289 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1290 rejects a recipient: pass the reject to the originator.
1292 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1293 Many were false-positives and ignorable, but it's worth fixing the
1296 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1297 for the new environment-manipulation done at startup. Move the routines
1298 from being local to tls.c to being global via the os.c file.
1300 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1301 an extract embedded as result-arg for a map, the first arg for extract
1302 is unavailable so we cannot tell if this is a numbered or keyed
1303 extraction. Accept either.
1309 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1312 JH/02 The smtp transport option "multi_domain" is now expanded.
1314 JH/03 The smtp transport now requests PRDR by default, if the server offers
1317 JH/04 Certificate name checking on server certificates, when exim is a client,
1318 is now done by default. The transport option tls_verify_cert_hostnames
1319 can be used to disable this per-host. The build option
1320 EXPERIMENTAL_CERTNAMES is withdrawn.
1322 JH/05 The value of the tls_verify_certificates smtp transport and main options
1323 default to the word "system" to access the system default CA bundle.
1324 For GnuTLS, only version 3.0.20 or later.
1326 JH/06 Verification of the server certificate for a TLS connection is now tried
1327 (but not required) by default. The verification status is now logged by
1328 default, for both outbound TLS and client-certificate supplying inbound
1331 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1334 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1335 Status Notification (bounce) messages are now MIME format per RFC 3464.
1336 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1337 under the control of the dsn_advertise_hosts option, and routers may
1338 have a dsn_lasthop option.
1340 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1341 default, modifiable by a malware= option. The list separator for
1342 the options can now be changed in the usual way. Bug 68.
1344 JH/10 The smtp_receive_timeout main option is now expanded before use.
1346 JH/11 The incoming_interface log option now also enables logging of the
1347 local interface on delivery outgoing connections.
1349 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1350 if the interface and destination host and port all match.
1352 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1355 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1356 Patch from Andrew Lewis.
1358 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1359 now supports optional time-restrictions, weighting, and priority
1360 modifiers per server. Patch originally by <rommer@active.by>.
1362 JH/16 The spamd_address main option now supports a mixed list of local
1363 and remote servers. Remote servers can be IPv6 addresses, and
1364 specify a port-range.
1366 JH/17 Bug 68: The spamd_address main option now supports an optional
1367 timeout value per server.
1369 JH/18 Bug 1581: Router and transport options headers_add/remove can
1370 now have the list separator specified.
1372 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1375 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1378 JH/21 Support for the A6 type of dns record is withdrawn.
1380 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1381 rather than the verbs used.
1383 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1384 from 255 to 1024 chars.
1386 JH/24 Verification callouts now attempt to use TLS by default.
1388 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1389 are generic router options now. The defaults didn't change.
1391 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1392 Original patch from Alexander Shikoff, worked over by JH.
1394 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1395 files if ZCAT_COMMAND is not executable.
1397 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1399 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1401 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1402 Normally benign, it bites when the pair was led to by a CNAME;
1403 modern usage is to not canonicalize the domain to a CNAME target
1404 (and we were inconsistent anyway for A-only vs AAAA+A).
1406 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1408 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1409 when evaluating $sender_host_dnssec.
1411 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1412 $sender_helo_dnssec variable.
1414 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1416 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1418 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1420 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1421 documented as working, but never had. Support all but $spam_report.
1423 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1424 added for tls authenticator.
1426 HS/03 Add perl_taintmode main config option
1432 TL/01 When running the test suite, the README says that variables such as
1433 no_msglog_check are global and can be placed anywhere in a specific
1434 test's script, however it was observed that placement needed to be near
1435 the beginning for it to behave that way. Changed the runtest perl
1436 script to read through the entire script once to detect and set these
1437 variables, reset to the beginning of the script, and then run through
1438 the script parsing/test process like normal.
1440 TL/02 The BSD's have an arc4random API. One of the functions to induce
1441 adding randomness was arc4random_stir(), but it has been removed in
1442 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1443 function when detected.
1445 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1446 cause callback expansion.
1448 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1449 syntax errors in an expansion can be treated as a string instead of
1450 logging or causing an error, due to the internal use of bool_lax
1451 instead of bool when processing it.
1453 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1454 server certificates when making smtp deliveries.
1456 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1458 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1460 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1462 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1463 Merged patch from Sebastian Wiedenroth.
1465 JH/05 Fix results-pipe from transport process. Several recipients, combined
1466 with certificate use, exposed issues where response data items split
1467 over buffer boundaries were not parsed properly. This eventually
1468 resulted in duplicates being sent. This issue only became common enough
1469 to notice due to the introduction of connection certificate information,
1470 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1472 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1473 size buffer was used, resulting in syntax errors when an expansion
1476 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1477 version 3.3.6 or later.
1479 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1480 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1481 both become "event_action", the variables become $event_name, $event_data
1482 and $event_defer_errno. There is a new variable $verify_mode, usable in
1483 routers, transports and related events. The tls:cert event is now also
1484 raised for inbound connections, if the main configuration event_action
1487 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1488 early OCSP support, but no stapling (appears to be less than 1.0.0).
1490 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1491 server certificate names available under the smtp transport option
1492 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1495 JH/10 Time-related extraction expansions from certificates now use the main
1496 option "timezone" setting for output formatting, and are consistent
1497 between OpenSSL and GnuTLS compilations. Bug 1541.
1499 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1500 encoded parameter in the incoming message. Bug 1558.
1502 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1503 include certificate info, eximon was claiming there were spoolfile
1506 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1508 JH/14 Log delivery-related information more consistently, using the sequence
1509 "H=<name> [<ip>]" wherever possible.
1511 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1512 are problematic for Debian distribution, omit them from the release
1515 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1517 JH/16 Fix string representation of time values on 64bit time_t architectures.
1520 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1521 output list separator was used.
1526 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1527 checkers that were complaining about end of non-void function with no
1530 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1531 This was a regression introduced in 4.83 by another bugfix.
1533 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1535 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1536 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1542 TF/01 Correctly close the server side of TLS when forking for delivery.
1544 When a message was received over SMTP with TLS, Exim failed to clear up
1545 the incoming connection properly after forking off the child process to
1546 deliver the message. In some situations the subsequent outgoing
1547 delivery connection happened to have the same fd number as the incoming
1548 connection previously had. Exim would try to use TLS and fail, logging
1549 a "Bad file descriptor" error.
1551 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1552 utilities have not been installed.
1554 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1555 temporary space as the ACL may create new global variables.
1557 TL/01 LDAP support uses per connection or global context settings, depending
1558 upon the detected version of the libraries at build time.
1560 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1561 to extract and use the src ip:port in logging and expansions as if it
1562 were a direct connection from the outside internet. PPv2 support was
1563 updated based on HAProxy spec change in May 2014.
1565 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1567 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1568 Properly escape header and check for NULL return.
1570 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1573 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1575 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1576 characters in header names, implemented as a verify condition.
1577 Contributed by Michael Fischer v. Mollard.
1579 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1580 results permerror and temperror. Previous values are deprecated but
1581 still accepted. In a future release, err_perm and err_temp will be
1582 completely removed, which will be a backward incompatibility if the
1583 ACL tests for either of these two old results. Patch contributed by
1584 user bes-internal on the mailing list.
1586 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1588 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1589 selectors, in both main and reject logs.
1591 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1594 JH/07 Add malware type "sock" for talking to simple daemon.
1596 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1598 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1599 routers/transports under cutthrough routing.
1601 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1602 numbers. Touch up "bool" conditional to keep the same definition.
1604 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1606 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1608 JH/12 Expand items in router/transport headers_add or headers_remove lists
1609 individually rather than the list as a whole. Bug 1452.
1611 Required for reasonable handling of multiple headers_ options when
1612 they may be empty; requires that headers_remove items with embedded
1613 colons must have them doubled (or the list-separator changed).
1615 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1616 view the policy declared in the DMARC record. Currently, $dmarc_status
1617 is a combined value of both the record presence and the result of the
1620 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1622 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1623 dnslookup router and the smtp transport (applying to the forward
1626 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1627 of ldap servers used for a specific lookup. Patch provided by Heiko
1630 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1631 New variable $lookup_dnssec_authenticated for observability.
1633 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1634 Patch submitted by Lars Timman.
1636 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1638 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1639 Requires trusted mode and valid format message id, aborts otherwise.
1640 Patch contributed by Heiko Schlichting.
1642 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1643 certextract with support for various fields. Bug 1358.
1645 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1646 is requested by default, modifiable by smtp transport option
1649 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1650 operate on certificate variables to give certificate fingerprints
1651 Also new ${sha256:cert_variable}.
1653 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1655 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1656 Christian Aistleitner.
1658 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1660 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1661 file. Patch from Wolfgang Breyha.
1663 JH/25 Expand the coverage of the delivery $host and $host_address to
1664 client authenticators run in verify callout. Bug 1476.
1666 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1667 align with daemon_smtp_ports. Bug 72.
1669 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1670 support and error reporting did not work properly.
1672 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1673 and is readable. Patch from Andrew Colin Kissa.
1675 TL/14 Enhance documentation of ${run expansion and how it parses the
1676 commandline after expansion, particularly in the case when an
1677 unquoted variable expansion results in an empty value.
1679 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1681 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1682 by renaming away from it. Addresses GH issue 15, reported by
1685 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1687 TL/15 SECURITY: prevent double expansion in math comparison functions
1688 (can expand unsanitized data). Not remotely exploitable.
1695 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1697 PP/02 Make -n do something, by making it not do something.
1698 When combined with -bP, the name of an option is not output.
1700 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1703 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1704 $sender_host_name and config options to manage this, and basic check
1707 PP/05 DSCP support for outbound connections and control modifier for inbound.
1709 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1710 (Only plugin which currently uses this is kerberos4, which nobody should
1711 be using, but we should make it available and other future plugins might
1712 conceivably use it, even though it would break NAT; stuff *should* be
1713 using channel bindings instead).
1715 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1716 name; added for Sendmail compatibility; requires admin caller.
1717 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1718 just ignore it); requires trusted caller.
1719 Also parse but ignore: -Ac -Am -X<logfile>
1722 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1724 TL/02 Add +smtp_confirmation as a default logging option.
1726 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1727 Patch by Magnus Holmgren from 2007-02-20.
1729 TL/04 Bugzilla 1281 - Spec typo.
1730 Bugzilla 1283 - Spec typo.
1731 Bugzilla 1290 - Spec grammar fixes.
1733 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1735 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1737 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1738 mailing list by by Dmitry Isaikin.
1740 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1742 JH/02 Support "G" suffix to numbers in ${if comparisons.
1744 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1746 NM/01 Bugzilla 1197 - Spec typo
1747 Bugzilla 1196 - Spec examples corrections
1749 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1751 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1752 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1755 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1756 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1758 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1759 "acl {{name}{arg}...}", and optional args on acl condition
1762 JH/05 Permit multiple router/transport headers_add/remove lines.
1764 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1766 JH/07 Avoid using a waiting database for a single-message-only transport.
1767 Performance patch from Paul Fisher. Bugzilla 1262.
1769 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1772 JH/09 Add $headers_added variable, with content from use of ACL modifier
1773 add_header (but not yet added to the message). Bugzilla 199.
1775 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1776 Pulled from Bugzilla 817 by Wolfgang Breyha.
1778 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1780 (nb: this is the same fix as in Exim 4.80.1)
1782 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1785 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1788 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1790 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1791 advertise SMTP AUTH mechanism to us, instead of a generic
1792 protocol violation error. Also, make Exim more robust to bad
1793 data from the Dovecot auth socket.
1795 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1797 When a queue runner is handling a message, Exim first routes the
1798 recipient addresses, during which it prunes them based on the retry
1799 hints database. After that it attempts to deliver the message to
1800 any remaining recipients. It then updates the hints database using
1803 So if a recipient address works intermittently, it can get repeatedly
1804 deferred at routing time. The retry hints record remains fresh so the
1805 address never reaches the final cutoff time.
1807 This is a fairly common occurrence when a user is bumping up against
1808 their storage quota. Exim had some logic in its local delivery code
1809 to deal with this. However it did not apply to per-recipient defers
1810 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1812 This change adds a proper retry rule check during routing so that the
1813 final cutoff time is checked against the message's age. We only do
1814 this check if there is an address retry record and there is not a
1815 domain retry record; this implies that previous attempts to handle
1816 the address had the retry_use_local_parts option turned on. We use
1817 this as an approximation for the destination being like a local
1818 delivery, as in LMTP.
1820 I suspect this new check makes the old local delivery cutoff check
1821 redundant, but I have not verified this so I left the code in place.
1823 TF/02 Correct gecos expansion when From: is a prefix of the username.
1825 Test 0254 submits a message to Exim with the header
1829 When I ran the test suite under the user fanf2, Exim expanded
1830 the header to contain my full name, whereas it should have added
1831 a Resent-Sender: header. It erroneously treats any prefix of the
1832 username as equal to the username.
1834 This change corrects that bug.
1836 GF/01 DCC debug and logging tidyup
1837 Error conditions log to paniclog rather than rejectlog.
1838 Debug lines prefixed by "DCC: " to remove any ambiguity.
1840 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1842 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1843 Bug spotted by Jeremy Harris; was flawed since initial commit.
1844 Would have resulted in OCSP responses post-SNI triggering an Exim
1845 NULL dereference and crash.
1847 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1849 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1850 Bug detection, analysis and fix by Samuel Thibault.
1851 Bugzilla 1331, Debian bug #698092.
1853 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1855 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1856 Server implementation by Todd Lyons, client by JH.
1857 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1858 config variable "prdr_enable" controls whether the server
1859 advertises the facility. If the client requests PRDR a new
1860 acl_data_smtp_prdr ACL is called once for each recipient, after
1861 the body content is received and before the acl_smtp_data ACL.
1862 The client is controlled by both of: a hosts_try_prdr option
1863 on the smtp transport, and the server advertisement.
1864 Default client logging of deliveries and rejections involving
1865 PRDR are flagged with the string "PRDR".
1867 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1868 fclose(). Diagnosis by Todd Lyons.
1870 PP/17 Update configure.default to handle IPv6 localhost better.
1871 Patch by Alain Williams (plus minor tweaks).
1874 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1875 This is now consistent with GnuTLS, and is now documented: the
1876 previous undocumented portable approach to treating the option as
1877 unset was to force an expansion failure. That still works, and
1878 an empty string is now equivalent.
1880 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1881 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1882 not performing validation itself.
1884 PP/20 Added force_command boolean option to pipe transport.
1885 Patch from Nick Koston, of cPanel Inc.
1887 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1890 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1892 PP/21 Fix eximon continuous updating with timestamped log-files.
1893 Broken in a format-string cleanup in 4.80, missed when I repaired the
1894 other false fix of the same issue.
1895 Report and fix from Heiko Schlichting.
1898 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1899 Report from Prashanth Katuri.
1901 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1902 It's SecureTransport, so affects any MacOS clients which use the
1903 system-integrated TLS libraries, including email clients.
1905 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1906 using a MIME ACL for non-SMTP local injection.
1907 Report and assistance in diagnosis by Warren Baker.
1909 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1911 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1913 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1914 last id that failed so it may be referenced in subsequent ACL's.
1916 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1919 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1920 ldap library initialization, allowing self-signed CA's to be
1921 used. Also properly sets require_cert option later in code by
1922 using NULL (global ldap config) instead of ldap handle (per
1923 session). Bug diagnosis and testing by alxgomz.
1925 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1926 the src/util/ subdirectory.
1928 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1929 renamed to Transport Post Delivery Action by Jeremy Harris, as
1932 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1933 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1934 redis_servers = needs to be configured which will be used by the redis
1935 lookup. Patch from Warren Baker, of The Packet Hub.
1937 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1939 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1940 hostname or reverse DNS when processing a host list. Used suggestions
1941 from multiple comments on this bug.
1943 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1945 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1946 Missed a few lines, added it to make the runtest require no keyboard
1949 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1950 contains upper case chars. Make router use caseful_local_part.
1952 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1953 support when GnuTLS has been built with p11-kit.
1959 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1961 This, or similar/improved, will also be change PP/11 of 4.82.
1967 PP/01 Handle short writes when writing local log-files.
1968 In practice, only affects FreeBSD (8 onwards).
1969 Bugzilla 1053, with thanks to Dmitry Isaikin.
1971 NM/01 Bugzilla 949 - Documentation tweak
1973 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1976 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1978 PP/02 Implemented gsasl authenticator.
1980 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1982 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1983 `pkg-config foo` for cflags/libs.
1985 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1986 with rest of GSASL and with heimdal_gssapi.
1988 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1989 `pkg-config foo` for cflags/libs for the TLS implementation.
1991 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1992 properties get this fed in as external SSF. A number of robustness
1993 and debugging improvements to the cyrus_sasl authenticator.
1995 PP/08 cyrus_sasl server now expands the server_realm option.
1997 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1998 Patch by Jeremy Harris.
2000 PP/10 Added dbmjz lookup type.
2002 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2004 PP/12 MAIL args handles TAB as well as SP, for better interop with
2005 non-compliant senders.
2006 Analysis and variant patch by Todd Lyons.
2008 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2009 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2010 Patch from Dirk Mueller <dmueller@suse.com>
2012 PP/13 tls_peerdn now print-escaped for spool files.
2013 Observed some $tls_peerdn in wild which contained \n, which resulted
2014 in spool file corruption.
2016 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2017 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2018 or write after TLS renegotiation, which otherwise led to messages
2021 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2022 as a tracking header (ie: a signed header comes before the signature).
2023 Patch from Wolfgang Breyha.
2025 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2026 comma-sep list; embedded commas doubled.
2028 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2030 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2032 Report and patch from Dmitry Banschikov.
2034 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2035 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2036 failures. We appear to now support TLS1.1+ with Exim.
2038 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2039 lets Exim select keys and certificates based upon TLS SNI from client.
2040 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2041 before an outbound SMTP session. New log_selector, +tls_sni.
2043 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2044 NULL dereference. Report and patch from Alun Jones.
2046 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2047 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2048 Not seeing resolver debug output on NetBSD, but suspect this is a
2049 resolver implementation change.
2051 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2052 Left warnings. Added "eximon gdb" invocation mode.
2054 PP/21 Defaulting "accept_8bitmime" to true, not false.
2056 PP/22 Added -bw for inetd wait mode support.
2058 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2059 locate the relevant includes and libraries. Made this the default.
2061 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2062 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2064 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2065 This may cause build issues on older platforms.
2067 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2068 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2069 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2070 Added SNI support via GnuTLS too.
2071 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2073 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2075 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2076 Applied second patch from Janne, implementing suggestion to default
2077 multiple-strings-in-record handling to match SPF spec.
2079 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2081 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2082 read-only, out of scope).
2083 Patch from Wolfgang Breyha, report from Stuart Northfield.
2085 PP/29 Fix three issues highlighted by clang analyser static analysis.
2086 Only crash-plausible issue would require the Cambridge-specific
2087 iplookup router and a misconfiguration.
2088 Report from Marcin Mirosław.
2090 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2092 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2093 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2094 As part of this, removing so much warning spew let me fix some minor
2095 real issues in debug logging.
2097 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2098 assignment on my part. Fixed.
2100 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2101 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2102 Janne Snabb (who went above and beyond: thank you).
2104 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2105 string otherwise requires a connection and a bunch more work and it's
2106 relatively easy to get wrong. Should also expose TLS library linkage
2109 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2110 64-bit ${eval} (JH/03).
2112 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2113 GNU libc to support some of the 64-bit stuff, should not lead to
2114 conflicts. Defined before os.h is pulled in, so if a given platform
2115 needs to override this, it can.
2117 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2118 protection layer was required, which is not implemented.
2119 Bugzilla 1254, patch from Wolfgang Breyha.
2121 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2122 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2123 tls_dhparam take prime identifiers. Also unbreak combination of
2124 OpenSSL+DH_params+TLSSNI.
2126 PP/39 Disable SSLv2 by default in OpenSSL support.
2132 PP/01 Solaris build fix for Oracle's LDAP libraries.
2133 Bugzilla 1109, patch from Stephen Usher.
2135 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2137 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2140 TF/02 Fix a couple more cases where we did not log the error message
2141 when unlink() failed. See also change 4.74-TF/03.
2143 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2144 lock up or crash if it happened to be inside a call to libc when it
2145 got a SIGUSR1 from exiwhat.
2147 The SIGUSR1 handler appends the current process status to the process
2148 log which is later printed by exiwhat. It used to use the general
2149 purpose logging code to do this, but several functions it calls are
2150 not safe for signals.
2152 The new output code in the SIGUSR1 handler is specific to the process
2153 log, and simple enough that it's easy to inspect for signal safety.
2154 Removing some special cases also simplifies the general logging code.
2155 Removing the spurious timestamps from the process log simplifies
2158 TF/04 Improved ratelimit ACL condition.
2160 The /noupdate option has been deprecated in favour of /readonly which
2161 has clearer semantics. The /leaky, /strict, and /readonly update modes
2162 are mutually exclusive. The update mode is no longer included in the
2163 database key; it just determines when the database is updated. (This
2164 means that when you upgrade Exim will forget old rate measurements.)
2166 Exim now checks that the per_* options are used with an update mode that
2167 makes sense for the current ACL. For example, when Exim is processing a
2168 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2169 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2170 must specify per_mail/readonly. If you omit the update mode it defaults to
2171 /leaky where that makes sense (as before) or /readonly where required.
2173 The /noupdate option is now undocumented but still supported for
2174 backwards compatibility. It is equivalent to /readonly except that in
2175 ACLs where /readonly is required you may specify /leaky/noupdate or
2176 /strict/noupdate which are treated the same as /readonly.
2178 A useful new feature is the /count= option. This is a generalization
2179 of the per_byte option, so that you can measure the throughput of other
2180 aggregate values. For example, the per_byte option is now equivalent
2181 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2183 The per_rcpt option has been generalized using the /count= mechanism
2184 (though it's more complicated than the per_byte equivalence). When it is
2185 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2186 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2187 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2188 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2189 Note that using per_rcpt with a non-readonly update mode in more than
2190 one ACL will cause the recipients to be double-counted. (The per_mail
2191 and per_byte options don't have this problem.)
2193 The handling of very low rates has changed slightly. If the computed rate
2194 is less than the event's count (usually one) then this event is the first
2195 after a long gap. In this case the rate is set to the same as this event's
2196 count, so that the first message of a spam run is counted properly.
2198 The major new feature is a mechanism for counting the rate of unique
2199 events. The new per_addr option counts the number of different
2200 recipients that someone has sent messages to in the last time period. It
2201 behaves like per_rcpt if all the recipient addresses are different, but
2202 duplicate recipient addresses do not increase the measured rate. Like
2203 the /count= option this is a general mechanism, so the per_addr option
2204 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2205 example, measure the rate that a client uses different sender addresses
2206 with the options per_mail/unique=$sender_address. There are further
2207 details in the main documentation.
2209 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2211 TF/06 Removed a few PCRE remnants.
2213 TF/07 Automatically extract Exim's version number from tags in the git
2214 repository when doing development or release builds.
2216 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2217 Bugzilla 879. Patch from Paul Fisher.
2219 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2220 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2223 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2225 PP/05 Variable $av_failed, true if the AV scanner deferred.
2226 Bugzilla 1078. Patch from John Horne.
2228 PP/06 Stop make process more reliably on build failure.
2229 Bugzilla 1087. Patch from Heiko Schlittermann.
2231 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2232 Bugzilla 1089. Patch from Heiko Schlittermann.
2234 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2235 Bugzilla 1131. Patch from Holger Weiß.
2237 PP/09 Handle IPv6 addresses with SPF.
2238 Bugzilla 860. Patch from Wolfgang Breyha.
2240 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2242 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2245 PP/11 match_* no longer expand right-hand-side by default.
2246 New compile-time build option, EXPAND_LISTMATCH_RHS.
2247 New expansion conditions, "inlist", "inlisti".
2249 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2251 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2253 PP/14 fix log_write() format string regression from TF/03.
2254 Bugzilla 1152. Patch from Dmitry Isaikin.
2260 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2262 PP/02 Harmonised TLS library version reporting; only show if debugging.
2263 Layout now matches that introduced for other libraries in 4.74 PP/03.
2265 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2267 PP/04 New "dns_use_edns0" global option.
2269 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2272 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2273 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2275 TK/01 Updated PolarSSL code to 0.14.2.
2276 Bugzilla 1097. Patch from Andreas Metzler.
2278 PP/07 Catch divide-by-zero in ${eval:...}.
2279 Fixes bugzilla 1102.
2281 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2284 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2285 format-string attack -- SECURITY: remote arbitrary code execution.
2287 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2288 time unintentionally subject to list matching rules, letting the header
2289 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2290 arbitrary string expansion). This allowed for information disclosure.
2292 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2293 INT_MIN/-1 -- value coerced to INT_MAX.
2299 NM/01 Workaround for PCRE version dependency in version reporting
2302 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2303 This fixes portability to compilers other than gcc, notably
2304 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2306 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2307 makefiles for portability to HP-UX and POSIX correctness.
2309 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2310 Also via indented variable definition in the Makefile.
2311 (Debugging by Oliver Heesakkers).
2313 PP/02 Restore caching of spamd results with expanded spamd_address.
2314 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2316 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2317 Improves build reliability. Fix from: Frank Elsner
2319 NM/02 Fix wide character breakage in the rfc2047 coding
2320 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2322 NM/03 Allow underscore in dnslist lookups
2323 Fixes bug 1026. Patch from Graeme Fowler
2325 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2326 Code patches from Adam Ciarcinski of NetBSD.
2328 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2331 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2332 is logged, to avoid truncation. Patch from John Horne.
2334 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2335 Patch from Jakob Hirsch.
2337 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2338 SQL string expansion failure details.
2339 Patch from Andrey Oktyabrski.
2341 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2342 Patch from Simon Arlott.
2344 PP/09 New lookups functionality failed to compile on old gcc which rejects
2345 extern declarations in function scope.
2346 Patch from Oliver Fleischmann
2348 PP/10 Use sig_atomic_t for flags set from signal handlers.
2349 Check getgroups() return and improve debugging.
2350 Fixed developed for diagnosis in bug 927 (which turned out to be
2353 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2354 Patch from Mark Zealey.
2356 PP/12 Bugzilla 1056: Improved spamd server selection.
2357 Patch from Mark Zealey.
2359 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2360 Based on patch from Heiko Schlittermann.
2362 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2363 Patch from Uwe Doering, sign-off by Michael Haardt.
2365 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2366 variable declaration deep within a block. Bug and patch from
2369 PP/15 lookups-Makefile IRIX compatibility coercion.
2371 PP/16 Make DISABLE_DKIM build knob functional.
2373 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2374 Patch by Simon Arlott
2376 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2377 variable argument macros. Our copy now differs from upstream.
2383 TF/01 Failure to get a lock on a hints database can have serious
2384 consequences so log it to the panic log.
2386 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2387 controlled using the smtp_confirmation log selector.
2389 TF/03 Include the error message when we fail to unlink a spool file.
2391 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2392 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2393 for maintaining out-of-tree patches for some time.
2395 PP/01 Bugzilla 139: Documentation and portability issues.
2396 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2397 Handle per-OS dynamic-module compilation flags.
2399 PP/02 Let /dev/null have normal permissions.
2400 The 4.73 fixes were a little too stringent and complained about the
2401 permissions on /dev/null. Exempt it from some checks.
2402 Reported by Andreas M. Kirchwitz.
2404 PP/03 Report version information for many libraries, including
2405 Exim version information for dynamically loaded libraries. Created
2406 version.h, now support a version extension string for distributors
2407 who patch heavily. Dynamic module ABI change.
2409 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2410 privilege escalation vulnerability whereby the Exim run-time user
2411 can cause root to append content of the attacker's choosing to
2414 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2417 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2418 If dropping privileges for untrusted macros, we disabled normal logging
2419 on the basis that it would fail; for the Exim run-time user, this is not
2420 the case, and it resulted in successful deliveries going unlogged.
2421 Fixed. Reported by Andreas Metzler.
2427 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2428 only prepend for the Resent-* case. Fixes regression introduced in
2429 Exim 4.70 by NM/22 for Bugzilla 607.
2431 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2432 increasing numbers of administrators be bitten by this.
2434 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2436 PP/03 Bugzilla 994: added openssl_options main configuration option.
2438 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2440 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2442 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2444 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2445 without a peer certificate, leading to a segfault because of an
2446 assumption that peers always have certificates. Be a little more
2447 paranoid. Problem reported by Martin Tscholak.
2449 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2450 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2451 NB: ClamAV planning to remove STREAM in "middle of 2010".
2452 CL also introduces -bmalware, various -d+acl logging additions and
2453 more caution in buffer sizes.
2455 PP/09 Implemented reverse_ip expansion operator.
2457 PP/10 Bugzilla 937: provide a "debug" ACL control.
2459 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2461 PP/12 Bugzilla 973: Implement --version.
2463 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2465 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2467 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2469 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2470 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2471 ignore trailing whitespace.
2473 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2475 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2478 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2479 Notification from Dr Andrew Aitchison.
2481 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2482 ExtendedDetectionInfo response format.
2483 Notification from John Horne.
2485 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2488 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2489 XSL and documented dependency on system catalogs, with examples of how
2492 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2495 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2496 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2497 configuration file which is writeable by the Exim user or group.
2499 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2500 of configuration files to cover files specified with the -C option if
2501 they are going to be used with root privileges, not just the default
2504 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2505 option (effectively making it always true).
2507 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2508 files to be used while preserving root privileges.
2510 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2511 that rogue child processes cannot use them.
2513 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2514 run-time user, instead of root.
2516 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2517 Exim run-time user without dropping privileges.
2519 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2520 result string, instead of calling string_vformat() twice with the same
2523 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2524 for other users. Others should always drop root privileges if they use
2525 -C on the command line, even for a whitelisted configure file.
2527 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2529 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2535 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2536 $data_path, and $header_path variables; fixed documentation bugs and
2539 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2540 exipick to access non-standard spools, including the "frozen" queue
2543 NM/01 Bugzilla 965: Support mysql stored procedures.
2544 Patch from Alain Williams
2546 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2548 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2549 Patch from Andreas Metzler
2551 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2552 Patch from Kirill Miazine
2554 NM/05 Bugzilla 671: Added umask to procmail example.
2556 JJ/03 installed exipick 20100323.0, fixing doc bug
2558 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2559 directory. Notification and patch from Dan Rosenberg.
2561 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2563 TK/02 Improve log output when DKIM signing operation fails.
2565 MH/01 Treat the transport option dkim_domain as a colon separated
2566 list, not as a single string, and sign the message with each element,
2567 omitting multiple occurences of the same signer.
2569 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2570 Bugzilla 985, 986. Patch by Simon Arlott
2572 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2573 Patch by Simon Arlott
2575 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2576 MBX locking. Notification from Dan Rosenberg.
2582 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2584 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2586 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2588 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2590 NM/04 Bugzilla 915: Flag broken perl installation during build.
2596 TK/01 Added patch by Johannes Berg that expands the main option
2597 "spamd_address" if it starts with a dollar sign.
2599 TK/02 Write list of recipients to X-Envelope-Sender header when building
2600 the mbox-format spool file for content scanning (suggested by Jakob
2603 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2604 (http://www.dcc-servers.net/) support via dccifd. Activated by
2605 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2607 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2608 by Mark Daniel Reidel <mr@df.eu>.
2610 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2611 When building exim an external PCRE library is now needed -
2612 PCRE is a system library on the majority of modern systems.
2613 See entry on PCRE_LIBS in EDITME file.
2615 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2616 conversation. Added nologin parameter to request.
2617 Patch contributed by Kirill Miazine.
2619 TF/01 Do not log submission mode rewrites if they do not change the address.
2621 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2623 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2624 log files in place. Contributed by Roberto Lima.
2626 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2628 TF/03 Bugzilla 615: When checking the local_parts router precondition
2629 after a local_part_suffix or local_part_prefix option, Exim now
2630 does not use the address's named list lookup cache, since this
2631 contains cached lookups for the whole local part.
2633 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2634 Robert Millan. Documentation is in experimental-spec.txt.
2636 TF/04 Bugzilla 668: Fix parallel build (make -j).
2638 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2640 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2641 Patch provided by Jan Srzednicki.
2643 TF/05 Leading white space used to be stripped from $spam_report which
2644 wrecked the formatting. Now it is preserved.
2646 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2647 that they are available at delivery time.
2649 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2651 TF/08 TLS error reporting now respects the incoming_interface and
2652 incoming_port log selectors.
2654 TF/09 Produce a more useful error message if an SMTP transport's hosts
2655 setting expands to an empty string.
2657 NM/06 Bugzilla 744: EXPN did not work under TLS.
2658 Patch provided by Phil Pennock.
2660 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2661 Patch provided by Richard Godbee.
2663 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2664 acl_smtp_notquit, added index entry.
2666 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2667 Patch provided by Eugene Bujak.
2669 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2670 accept(). Patch provided by Maxim Dounin.
2672 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2673 Patch provided by Phil Pennock.
2675 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2677 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2678 Patch provided by Brad "anomie" Jorsch.
2680 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2681 Patch provided by Dean Brooks.
2683 TK/05 Add native DKIM support (does not depend on external libraries).
2685 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2686 Patch provided by Graeme Fowler.
2688 NM/16 Bugzilla 851: Documentation example syntax fix.
2690 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2692 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2695 NM/19 Bugzilla 745: TLS version reporting.
2696 Patch provided by Phil Pennock.
2698 NM/20 Bugzilla 167: bool: condition support.
2699 Patch provided by Phil Pennock.
2701 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2702 clients. Patch provided by Phil Pennock.
2704 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2705 Patch provided by Brad "anomie" Jorsch.
2707 NM/23 Bugzilla 687: Fix misparses in eximstats.
2708 Patch provided by Heiko Schlittermann.
2710 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2711 Patch provided by Heiko Schlittermann.
2713 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2714 plus update to original patch.
2716 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2718 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2719 Patch provided by David Brownlee.
2721 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2723 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2725 NM/30 Bugzilla 888: TLS documentation bugfixes.
2727 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2729 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2730 Unlike the original bugzilla I have changed all shell scripts in src tree.
2732 NM/33 Bugzilla 898: Transport filter timeout fix.
2733 Patch by Todd Rinaldo.
2735 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2736 Patch by Serge Demonchaux.
2738 NM/35 Bugzilla 39: Base64 decode bug fixes.
2739 Patch by Jakob Hirsch.
2741 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2743 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2745 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2747 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2753 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2754 ALT-N's libdkim that I have put here:
2755 http://duncanthrax.net/exim-experimental/
2757 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2758 were called 'true' and it seems that C99 defines that as a reserved
2759 keyword to be used with 'bool' variable types. That means you could
2760 not include C99-style headers which use bools without triggering
2761 build errors in sieve.c.
2763 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2764 as mailq or other aliases. Changed the --help handling significantly
2765 to do whats expected. exim_usage() emits usage/help information.
2767 SC/01 Added the -bylocaldomain option to eximstats.
2769 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2771 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2773 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2779 PH/01 Another patch from the Sieve maintainer.
2781 PH/02 When an IPv6 address is converted to a string for single-key lookup
2782 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2783 dots are used instead of colons so that keys in lsearch files need not
2784 contain colons. This was done some time before quoting was made available
2785 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2786 (notated using the quote facility) so as to distinguish them from IPv4
2787 keys. This meant that lookups for IP addresses in host lists did not work
2788 for iplsearch lookups.
2790 This has been fixed by arranging for IPv6 addresses to be expressed with
2791 colons if the lookup type is iplsearch. This is not incompatible, because
2792 previously such lookups could never work.
2794 The situation is now rather anomalous, since one *can* have colons in
2795 ordinary lsearch keys. However, making the change in all cases is
2796 incompatible and would probably break a number of configurations.
2798 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2801 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2802 conversion specification without a maximum field width, thereby enabling
2803 a rogue spamd server to cause a buffer overflow. While nobody in their
2804 right mind would setup Exim to query an untrusted spamd server, an
2805 attacker that gains access to a server running spamd could potentially
2806 exploit this vulnerability to run arbitrary code as the Exim user.
2808 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2809 $primary_hostname instead of what libspf2 thinks the hosts name is.
2811 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2812 a directory entry by the name of the lookup key. Previously, if a
2813 symlink pointed to a non-existing file or a file in a directory that
2814 Exim lacked permissions to read, a lookup for a key matching that
2815 symlink would fail. Now it is enough that a matching directory entry
2816 exists, symlink or not. (Bugzilla 503.)
2818 PH/03 The body_linecount and body_zerocount variables are now exported in the
2821 PH/04 Added the $dnslist_matched variable.
2823 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2824 This means they are set thereafter only if the connection becomes
2827 PH/06 Added the client_condition to authenticators so that some can be skipped
2828 by clients under certain conditions.
2830 PH/07 The error message for a badly-placed control=no_multiline_responses left
2831 "_responses" off the end of the name.
2833 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2835 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2836 (without spaces) instead of just copying the configuration text.
2838 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2840 PH/11 Added $max_received_linelength.
2842 PH/12 Added +ignore_defer and +include_defer to host lists.
2844 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2845 way in which PCRE > 7.0 is built.
2847 PH/14 Implemented queue_only_load_latch.
2849 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2850 MAIL command. The effect was to mangle the value on 64-bit systems.
2852 PH/16 Another patch from the Sieve maintainer.
2854 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2856 PH/18 If a system quota error occurred while trying to create the file for
2857 a maildir delivery, the message "Mailbox is full" was not appended to the
2858 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2859 only to a quota excession during the actual writing of the file.
2861 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2862 characters?) which causes problems in log lines. The DN values are now
2863 passed through string_printing() before being added to log lines.
2865 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2866 and InterBase are left for another time.)
2868 PH/21 Added message_body_newlines option.
2870 PH/22 Guard against possible overflow in moan_check_errorcopy().
2872 PH/23 POSIX allows open() to be a macro; guard against that.
2874 PH/24 If the recipient of an error message contained an @ in the local part
2875 (suitably quoted, of course), incorrect values were put in $domain and
2876 $local_part during the evaluation of errors_copy.
2882 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2883 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2886 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2887 issue a MAIL command.
2889 PH/02 In an ACL statement such as
2891 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2893 if a client was not listed at all, or was listed with a value other than
2894 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2895 the condition was not true (as it should be), so access was not denied.
2896 The bug was that the ! inversion was incorrectly passed on to the second
2897 item. This has been fixed.
2899 PH/03 Added additional dnslists conditions == and =& which are different from
2900 = and & when the dns lookup returns more than one IP address.
2902 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2903 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2905 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2906 FSYNC, which compiles an option called disable_fsync that allows for
2907 bypassing fsync(). The documentation is heavily laced with warnings.
2909 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2911 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2912 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2913 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2914 including adding "make clean"; (3) Added -fPIC when compiling the test
2915 dynamically loaded module, to get rid of a warning.
2917 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2918 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2919 = 0s. The bug is otherwise harmless.
2921 PH/07 There was a bug in the dovecot authenticator such that the value of
2922 $auth1 could be overwritten, and so not correctly preserved, after a
2923 successful authentication. This usually meant that the value preserved by
2924 the server_setid option was incorrect.
2926 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2928 PH/09 Installed PCRE release 7.0.
2930 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2931 run for batched SMTP input. It is now run at the start of every message
2932 in the batch. While fixing this I discovered that the process information
2933 (output by running exiwhat) was not always getting set for -bs and -bS
2934 input. This is fixed, and it now also says "batched" for BSMTP.
2936 PH/11 Added control=no_pipelining.
2938 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2939 patch, slightly modified), and move the expansion of helo_data till after
2940 the connection is made in the smtp transport (so it can use these
2943 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2945 PH/14 Added log_selector = +pid.
2947 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2949 PH/16 Add ${if forany and ${if forall.
2951 PH/17 Added dsn_from option to vary the From: line in DSNs.
2953 PH/18 Flush SMTP output before performing a callout, unless control =
2954 no_callout_flush is set.
2956 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2957 was true (the default) a successful delivery failed to delete the retry
2958 item, thus causing premature timeout of the address. The bug is now
2961 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2963 PH/21 Long custom messages for fakedefer and fakereject are now split up
2964 into multiline responses in the same way that messages for "deny" and
2965 other ACL rejections are.
2967 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2968 with slight modification.
2970 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2971 draft, changing the syntax and factoring some duplicate code".
2973 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2974 for deliveries of the second and subsequent messages over the same SMTP
2977 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2978 ${reduce, with only minor "tidies".
2980 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2982 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2983 expansion side effects.
2985 PH/27 When a message times out after an over-quota error from an Exim-imposed
2986 quota, the bounce message says "mailbox is full". This message was not
2987 being given when it was a system quota that was exceeded. It now should
2990 MH/03 Made $recipients available in local_scan(). local_scan() already has
2991 better access to the recipient list through recipients_list[], but
2992 $recipients can be useful in postmaster-provided expansion strings.
2994 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2995 in the case of a MAIL command with additional options following the
2996 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2997 were accidentally chopped off.
2999 PH/29 SMTP synchronization checks are implemented when a command is read -
3000 there is a check that no more input is waiting when there shouldn't be
3001 any. However, for some commands, a delay in an ACL can mean that it is
3002 some time before the response is written. In this time, more input might
3003 arrive, invalidly. So now there are extra checks after an ACL has run for
3004 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3005 pipelining has not been advertised.
3007 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3009 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3010 returned in the SMTP response when smtp_return_error_details was false.
3011 This has been fixed.
3013 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3014 instead of the C I/O that was originally supplied, because problems were
3015 reported on Solaris.
3017 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3018 Exim which did not show up earlier: it was assuming that a call to
3019 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3020 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3021 was a macro that became an assignment, so it seemed to work. This has
3022 changed to a proper function call with a void return, hence the compile
3023 error. Exim's code has been fixed.
3025 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3028 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3030 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3032 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3033 because it turns out to be too big or there is a timeout) there is no
3034 "Completed" line in the log. When some messages of this type were
3035 selected by exigrep, they were listed as "not completed". Others were
3036 picked up by some special patterns. I have improved the selection
3037 criteria to be more general.
3039 PH/38 The host_find_failed option in the manualroute router can now be set
3040 to "ignore", to completely ignore a host whose IP address cannot be
3041 found. If all hosts are ignored, the behaviour is controlled by the new
3042 host_all_ignored option.
3044 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3045 homing or because of multiple MX records with /mx) generated more than
3046 one IP address, and the following item turned out to be the local host,
3047 all the secondary addresses of the first item were incorrectly removed
3048 from the list, along with the local host and any following hosts (which
3049 is what is supposed to happen).
3051 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3052 whoever called Exim into the -H file. In the case of the daemon it was
3053 behaving confusingly. When first started, it used values for whoever
3054 started the daemon, but after a SIGHUP it used the Exim user (because it
3055 calls itself on a restart). I have changed the code so that it now always
3058 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3059 message are rejected with the same error (e.g. no authentication or bad
3060 sender address), and a DATA command is nevertheless sent (as can happen
3061 with PIPELINING or a stupid MUA), the error message that was given to the
3062 RCPT commands is included in the rejection of the DATA command. This is
3063 intended to be helpful for MUAs that show only the final error to their
3066 PH/42 Another patch from the Sieve maintainer.
3068 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3069 Eximstats - Fixed some broken HTML links and added missing column headers
3071 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3072 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3074 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3076 PH/43 Yet another patch from the Sieve maintainer.
3078 PH/44 I found a way to check for a TCP/IP connection going away before sending
3079 the response to the final '.' that terminates a message, but only in the
3080 case where the client has not sent further data following the '.'
3081 (unfortunately, this is allowed). However, in many cases there won't be
3082 any further data because there won't be any more messages to send. A call
3083 to select() can be used: if it shows that the input is "ready", there is
3084 either input waiting, or the socket has been closed. An attempt to read
3085 the next input character can distinguish the two cases. Previously, Exim
3086 would have sent an OK response which the client would never have see.
3087 This could lead to message repetition. This fix should cure that, at
3088 least in a lot of common cases.
3090 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3091 advertised in response to EHLO.
3097 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3098 fixed by 4.65/MH/01 (is this a record?) are fixed:
3100 (i) An empty string was always treated as zero by the numeric comparison
3101 operators. This behaviour has been restored.
3103 (ii) It is documented that the numeric comparison operators always treat
3104 their arguments as decimal numbers. This was broken in that numbers
3105 starting with 0 were being interpreted as octal.
3107 While fixing these problems I realized that there was another issue that
3108 hadn't been noticed. Values of message_size_limit (both the global option
3109 and the transport option) were treated as octal if they started with 0.
3110 The documentation was vague. These values are now always treated as
3111 decimal, and I will make that clear in the documentation.
3117 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3118 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3121 MH/01 Don't check that the operands of numeric comparison operators are
3122 integers when their expansion is in "skipping" mode (fixes bug
3123 introduced by 4.64-PH/07).
3125 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3126 child addresses, Exim now panics and dies. Previously, because the count
3127 is held in a short int, deliveries were likely to be lost. As such a
3128 large number of recipients for a single message is ridiculous
3129 (performance will be very, very poor), I have chosen to impose a limit
3130 rather than extend the field.
3136 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3137 leftover -K file (the existence of which was triggered by #402).
3138 While we were at it, introduced process PID as part of the -K
3139 filename. This should rule out race conditions when creating
3142 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3143 processing considerably. Previous code took too long for large mails,
3144 triggering a timeout which in turn triggers #401.
3146 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3147 in the DK code in transports.c. sendfile() is not really portable,
3148 hence the _LINUX specificness.
3150 TF/01 In the add_headers option to the mail command in an Exim filter,
3151 there was a bug that Exim would claim a syntax error in any
3152 header after the first one which had an odd number of characters
3155 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3156 callout verification, Exim cached a "reject" for the entire domain. This
3157 is correct for most verifications, but it is not correct for a recipient
3158 verification with use_sender or use_postmaster set, because in that case
3159 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3160 case of MAIL FROM:<> rejection from other early rejections (e.g.
3161 rejection of HELO). When verifying a recipient using a non-null MAIL
3162 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3163 Whatever the result of the callout, the value of the domain cache is
3164 left unchanged (for any other kind of callout, getting as far as trying
3165 RCPT means that the domain itself is ok).
3167 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3170 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3171 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3172 session, the daemon ignores ECONNECT errors and logs others; it now
3173 ignores EPIPE as well.
3175 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3176 (quoted-printable decoding).
3178 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3179 later the small subsequent patch to fix an introduced bug.
3181 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3183 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3185 PH/08 An error is now given if message_size_limit is specified negative.
3187 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3188 to be given (somewhat) arbitrary names.
3190 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3193 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3194 miscellaneous code fixes
3196 PH/10 Added the log_reject_target ACL modifier to specify where to log
3199 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3200 hostname. This is wrong, because it relates to the incoming message (and
3201 probably the interface on which it is arriving) and not to the outgoing
3202 callout (which could be using a different interface). This has been
3203 changed to use the value of the helo_data option from the smtp transport
3204 instead - this is what is used when a message is actually being sent. If
3205 there is no remote transport (possible with a router that sets up host
3206 addresses), $smtp_active_hostname is used.
3208 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3209 tweaks were necessary in order to get it to work (see also 21 below):
3210 (a) The code assumed that strncpy() returns a negative number on buffer
3211 overflow, which isn't the case. Replaced with Exim's string_format()
3213 (b) There were several signed/unsigned issues. I just did the minimum
3214 hacking in of casts. There is scope for a larger refactoring.
3215 (c) The code used strcasecmp() which is not a standard C function.
3216 Replaced with Exim's strcmpic() function.
3217 (d) The code set only $1; it now sets $auth1 as well.
3218 (e) A simple test gave the error "authentication client didn't specify
3219 service in request". It would seem that Dovecot has changed its
3220 interface. Fortunately there's a specification; I followed it and
3221 changed what the client sends and it appears to be working now.
3223 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3226 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3227 address A is aliased to B and C, where B exists and C does not. Without
3228 -v the output is "A verified" because verification stops after a
3229 successful redirection if more than one address is generated. However,
3230 with -v the child addresses are also verified. Exim was outputting "A
3231 failed to verify" and then showing the successful verification for C,
3232 with its parentage. It now outputs "B failed to verify", showing B's
3233 parentage before showing the successful verification of C.
3235 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3236 look up a TXT record in a specific list after matching in a combined
3239 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3240 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3241 they consult the DNS. I had assumed they would set it the way they
3242 wanted; and indeed my experiments on Linux seem to show that in some
3243 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3244 To be on the safe side, however, I have now made the interface to
3245 host_find_byname() similar to host_find_bydns(), with an argument
3246 containing the DNS resolver options. The host_find_byname() function now
3247 sets these options at its start, just as host_find_bydns() does. The smtp
3248 transport options dns_qualify_single and dns_search_parents are passed to
3249 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3250 of host_find_byname() use the default settings of RES_DEFNAMES
3251 (qualify_single) but not RES_DNSRCH (search_parents).
3253 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3254 spool_read_header() do less string testing, by means of a preliminary
3255 switch on the second character of optional "-foo" lines. (This is
3256 overdue, caused by the large number of possibilities that now exist.
3257 Originally there were few.) While I was there, I also converted the
3258 str(n)cmp tests so they don't re-test the leading "-" and the first
3259 character, in the hope this might squeeze out yet more improvement.
3261 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3262 flag allowing group syntax was set by the header_syntax check but not
3263 turned off, possible causing trouble later; (2) The flag was not being
3264 set at all for the header_verify test, causing "group"-style headers to
3265 be rejected. I have now set it in this case, and also caused header_
3266 verify to ignore an empty address taken from a group. While doing this, I
3267 came across some other cases where the code for allowing group syntax
3268 while scanning a header line wasn't quite right (mostly, not resetting
3269 the flag correctly in the right place). These bugs could have caused
3270 trouble for malformed header lines. I hope it is now all correct.
3272 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3273 with the "reply" argument non-NULL. The code, however (which originally
3274 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3275 but it didn't always do it. This confused somebody who was copying the
3276 code for some other use. I have removed all the tests.
3278 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3279 feature that was used to support insecure browsers during the U.S. crypto
3280 embargo. It requires special client support, and Exim is probably the
3281 only MTA that supported it -- and would never use it because real RSA is
3282 always available. This code has been removed, because it had the bad
3283 effect of slowing Exim down by computing (never used) parameters for the
3284 RSA_EXPORT functionality.
3286 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3287 authenticator to fail if there's a tab character in the incoming data
3288 (there should never be unless someone is messing about, as it's supposed
3289 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3290 if the connection is using TLS or if the remote IP is the same as the
3291 local IP, and the "valid-client-cert option" if a client certificate has
3294 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3295 authenticators. This can be used for authorization after authentication
3296 succeeds. (In the case of plaintext, it servers for both authentication
3299 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3300 if any retry times were supplied.
3302 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3303 connection, where there is no client IP address to check. In this
3304 situation, the verify now always succeeds.
3306 PH/25 Applied John Jetmore's -Mset patch.
3308 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3310 PH/27 In a string expansion for a processed (not raw) header when multiple
3311 headers of the same name were present, leading whitespace was being
3312 removed from all of them, but trailing whitespace was being removed only
3313 from the last one. Now trailing whitespace is removed from each header
3314 before concatenation. Completely empty headers in a concatenation (as
3315 before) are ignored.
3317 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3318 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3320 PH/29 [Removed. This was a change that I later backed out, and forgot to
3321 correct the ChangeLog entry (that I had efficiently created) before
3322 committing the later change.]
3324 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3325 address errors (4xx response to RCPT) over the same connection as other
3326 messages routed to the same hosts. Such deliveries are always "forced",
3327 so retry times are not inspected. This resulted in far too many retries
3328 for the affected addresses. The effect occurred only when there were more
3329 hosts than the hosts_max_try setting in the smtp transport when it had
3330 the 4xx errors. Those hosts that it had tried were not added to the list
3331 of hosts for which the message was waiting, so if all were tried, there
3332 was no problem. Two fixes have been applied:
3334 (i) If there are any address or message errors in an SMTP delivery, none
3335 of the hosts (tried or untried) are now added to the list of hosts
3336 for which the message is waiting, so the message should not be a
3337 candidate for sending over the same connection that was used for a
3338 successful delivery of some other message. This seems entirely
3339 reasonable: after all the message is NOT "waiting for some host".
3340 This is so "obvious" that I'm not sure why it wasn't done
3341 previously. Hope I haven't missed anything, but it can't do any
3342 harm, as the worst effect is to miss an optimization.
3344 (ii) If, despite (i), such a delivery is accidentally attempted, the
3345 routing retry time is respected, so at least it doesn't keep
3346 hammering the server.
3348 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3349 in ${readsocket because some servers need this prod.
3351 PH/32 Added some extra debug output when updating a wait-xxx database.
3353 PH/33 The hint "could be header name not terminated by colon", which has been
3354 given for certain expansion errors for a long time, was not being given
3355 for the ${if def:h_colon_omitted{... case.
3357 PH/34 The spec says: "With one important exception, whenever a domain list is
3358 being scanned, $domain contains the subject domain." There was at least
3359 one case where this was not true.
3361 PH/35 The error "getsockname() failed: connection reset by peer" was being
3362 written to the panic log as well as the main log, but it isn't really
3363 panic-worthy as it just means the connection died rather early on. I have
3364 removed the panic log writing for the ECONNRESET error when getsockname()
3367 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3368 runs only) independently of the message's sender address. This meant
3369 that, if the 4xx error was in fact related to the sender, a different
3370 message to the same recipient with a different sender could confuse
3371 things. In particular, this can happen when sending to a greylisting
3372 server, but other circumstances could also provoke similar problems.
3373 I have changed the default so that the retry time for these errors is now
3374 based a combination of the sender and recipient addresses. This change
3375 can be overridden by setting address_retry_include_sender=false in the
3378 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3379 remote server are returned as part of bounce messages. This was not
3380 happening for LMTP over a pipe (the lmtp transport), but now it is the
3381 same for both kinds of LMTP.
3383 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3384 in header lines that were in fact CNAMEs. This is no longer the case.
3386 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3387 and queue runs started by the daemon processed all messages. This has
3388 been fixed so that -R and -S can now usefully be given with -q<time>.
3390 PH/40 Import PCRE release 6.7 (fixes some bugs).
3392 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3394 PH/42 Give an error if -q is specified more than once.
3396 PH/43 Renamed the variables $interface_address and $interface_port as
3397 $received_ip_address and $received_port, to make it clear that these
3398 values apply to message reception, and not to the outgoing interface when
3399 a message is delivered. (The old names remain recognized, of course.)
3401 PH/44 There was no timeout on the connect() call when using a Unix domain
3402 socket in the ${readsocket expansion. There now is.
3404 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3405 be meaningful with "accept".
3407 SC/01 Eximstats V1.43
3408 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3410 SC/02 Eximstats V1.44
3411 Use a glob alias rather than an array ref in the generated
3412 parser. This improves both readability and performance.
3414 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3415 Collect SpamAssassin and rejection statistics.
3416 Don't display local sender or destination tables unless
3417 there is data to show.
3418 Added average volumes into the top table text output.
3420 SC/04 Eximstats V1.46
3421 Collect data on the number of addresses (recipients)
3422 as well as the number of messages.
3424 SC/05 Eximstats V1.47
3425 Added 'Message too big' to the list of mail rejection
3426 reasons (thanks to Marco Gaiarin).
3428 SC/06 Eximstats V1.48
3429 Mainlog lines which have GMT offsets and are too short to
3430 have a flag are now skipped.
3432 SC/07 Eximstats V1.49 (Alain Williams)
3433 Added the -emptyok flag.
3435 SC/08 Eximstats V1.50
3436 Fixes for obtaining the IP address from reject messages.
3438 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3439 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3440 whitespace changes from 4.64-PH/27
3442 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3445 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3446 are found, allow negative numbers in numeric criteria)
3448 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3450 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3451 to match changes made in 4.64-PH/43
3453 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3455 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3456 "domain" is actually an IP address, and force a failure. This locks out
3457 those revolvers/nameservers that support "A-for-A" lookups, in
3458 contravention of the specifications.
3460 PH/48 When a host name was looked up from an IP address, and the subsequent
3461 forward lookup of the name timed out, the host name was left in
3462 $sender_host_name, contrary to the specification.
3464 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3465 restricted to single-key lookups, Exim was not diagnosing an error if
3466 * or *@ was used with a query-style lookup.
3468 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3470 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3471 long ago, but noone interested enough thought of it. Let's just say that
3472 the "1.1" means that there are some new functions that weren't there at
3473 some point in the past.
3475 PH/51 Error processing for expansion failure of helo_data from an smtp
3476 transport during callout processing was broken.
3478 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3479 tested/used via the -bh/-bhc/-bs options.
3481 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3482 bug, fixed in subsequent PCRE releases).
3484 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3485 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3487 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3493 SC/01 Use a glob alias rather than an array ref in eximstats generated
3494 parser. This improves both readability and performance.
3496 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3497 Don't display local sender or destination tables in eximstats unless
3498 there is data to show.
3499 Added average volumes into the eximstats top table text output.
3501 SC/03 Collect data on the number of addresses (recipients) as well
3502 as the number of messages in eximstats.
3504 TF/01 Correct an error in the documentation for the redirect router. Exim
3505 does (usually) call initgroups() when daemonizing.
3507 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3508 with consistent privilege compared to when running as a daemon.
3510 TF/03 Note in the spec that $authenticated_id is not set for local
3511 submissions from trusted users.
3513 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3514 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3516 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3517 by adding some example configuration directives to the default
3518 configuration file. A little bit of work is required to uncomment the
3519 directives and define how usernames and passwords are checked, but
3520 there is now a framework to start from.
3522 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3523 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3524 without this. I don't know how relevant this is to other LDAP libraries.
3526 PH/02 Add the verb name to the "unknown ACL verb" error.
3528 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3530 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3532 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3533 directory not expanded when it should be if an expanded home directory
3534 was set for the address (which is overridden by the transport).
3536 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3539 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3540 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3541 because it is too late at that time, and has no effect.
3543 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3544 security issue with \' (bugzilla #107). I could not use the
3545 PQescapeStringConn() function, because it needs a PGconn value as one of
3548 PH/08 When testing addresses using -bt, indicate those final addresses that
3549 are duplicates that would not cause an additional delivery. At least one
3550 person was confused, thinking that -bt output corresponded to deliveries.
3551 (Suppressing duplicates isn't a good idea as you lose the information
3552 about possibly different redirections that led to the duplicates.)
3554 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3555 systems where poll() doesn't work, in particular OS X.
3557 PH/10 Added more information to debugging output for retry time not reached.
3559 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3560 operations in malware.c.
3562 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3565 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3566 syslog_duplication set false, log lines that would normally be written
3567 both the the main log and to the reject log were not written to syslog at
3570 PH/14 In the default configuration, change the use of "message" in ACL warn
3571 statements to "add_header".
3573 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3574 not followed by a command (e.g. "seen endif").
3576 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3577 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3580 PH/17 Added extra conditions to the default value of delay_warning_condition
3584 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3585 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3586 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3589 The Auto-Submitted: and various List- headers are standardised, whereas I
3590 don't think Precedence: ever was.
3592 PH/18 Refactored debugging code in route_finduser() to show more information,
3593 in particular, the error code if getpwnam() issues one.
3595 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3596 This is apparently needed in addition to the PH/07 change above to avoid
3597 any possible encoding problems.
3599 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3600 but not after initializing Perl.
3602 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3603 output them only if debugging. By default they are written stderr,
3604 apparently, which is not desirable.
3606 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3609 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3612 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3614 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3615 authenticated or an ident call has been made. Suppress the default
3616 values for $authenticated_id and $authenticated_sender (but permit -oMai
3617 and -oMas) when testing with -bh.
3619 PH/24 Re-jigged the order of the tests in the default configuration so that the
3620 tests for valid domains and recipients precede the DNS black list and CSA
3621 tests, on the grounds that those ones are more expensive.
3623 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3624 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3625 This bug exists in every version of Exim that I still have, right back to
3628 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3629 However, an attempt to turn on case-sensitivity in a regex key by
3630 including (?-i) didn't work because the subject string was already
3631 lowercased, and the effects were non-intuitive. It turns out that a
3632 one-line patch can be used to allow (?-i) to work as expected.
3638 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3639 other effects) broke the use of negated acl sub-conditions.
3641 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3644 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3645 "Deny" causes Exim to reject the incoming connection with a 554 error.
3646 Unfortunately, if there is a major crisis, such as a disk failure,
3647 tcp-wrappers gives "deny", whereas what one would like would be some
3648 kind of temporary error. A kludge has been added to help with this.
3649 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3650 554 error is used if errno is still zero or contains ENOENT (which occurs
3651 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3654 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3656 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3657 errors. Otherwise a message that provokes a temporary error (when other
3658 messages do not) can cause a whole host to time out.
3660 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3661 addresses were routed directly to files or pipes from a redirect router.
3662 File deliveries just didn't batch; pipe deliveries might have suffered
3665 PH/06 A failure to get a lock for a hints database would erroneously always say
3666 "Failed to get write lock", even when it was really a read lock.
3668 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3669 of 0600. This has been changed to use the value of the lockfile_mode
3670 option (which defaults to 0600).
3672 PH/08 Applied small patch from the Sieve maintainer.
3674 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3675 folder from quota calculations, a direct delivery into this folder messed
3676 up the contents of the maildirsize file. This was because the regex was
3677 used only to exclude .Trash (or whatever) when the size of the mailbox
3678 was calculated. There was no check that a delivery was happening into an
3679 excluded directory. This bug has been fixed by ignoring all quota
3680 processing for deliveries into excluded directories.
3682 PH/10 Added the maildirfolder_create_regex option to appendfile.
3688 PH/01 The code for finding all the local interface addresses on a FreeBSD
3689 system running IPv6 was broken. This may well have applied to all BSD
3690 systems, as well as to others that have similar system calls. The broken
3691 code found IPv4 interfaces correctly, but gave incorrect values for the
3692 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3693 that it would not match correctly against @[] and not recognize the IPv6
3696 PH/02 The ipliteral router was not recognizing addresses of the form user@
3697 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3699 PH/03 Added disable_ipv6.
3701 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3702 decoded form, because it is most often used to construct To: headers
3703 lines in autoreplies, and the decoded form may well be syntactically
3704 invalid. However, $reply_address has leading white space removed, and all
3705 newlines turned into spaces so that the autoreply transport does not
3708 PH/05 If group was specified without a user on a router, and no group or user
3709 was specified on a transport, the group from the router was ignored.
3711 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3712 for visible compile-time settings that can be used to change these
3713 numbers, for those that want even more. Backwards compatibility with old
3714 spool files has been maintained. However, going back to a previous Exim
3715 release will lost any variables that are in spool files.
3717 PH/07 Two small changes when running in the test harness: increase delay when
3718 passing a TCP/IP connection to a new process, in case the original
3719 process has to generate a bounce, and remove special handling of
3720 127.0.0.2 (sic), which is no longer necessary.
3722 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3723 be the same on different OS.
3725 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3728 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3729 whether --show-vars was specified or not
3731 JJ/02 exipick: Added support for new ACL variable spool format introduced
3734 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3735 syntactically invalid From: or Reply-to: line, and a filter used this to
3736 generate an autoreply, and therefore failed to obtain an address for the
3737 autoreply, Exim could try to deliver to a non-existent relative file
3738 name, causing unrelated and misleading errors. What now happens is that
3739 it logs this as a hard delivery error, but does not attempt to create a
3742 PH/11 The exinext utility has a -C option for testing purposes, but although
3743 the given file was scanned by exinext itself; it wasn't being passed on
3744 when Exim was called.
3746 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3747 an end-of-file indication when reading a command response.
3749 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3750 compiled. In many other places in Exim, IPv6 addresses are always
3751 recognized, so I have changed this. It also means that IPv4 domain
3752 literals of the form [IPV4:n.n.n.n] are now always recognized.
3754 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3755 used if the router is not running as root, for example, when verifying at
3756 ACL time, or when using -bh. The debugging output from this situation was
3757 non-existent - all you got was a failure to exec. I have made two
3760 (a) Failures to set uid/gid, the current directory, or a process leader
3761 in a subprocess such as that created by queryprogram now generate
3762 suitable debugging output when -d is set.
3764 (b) The queryprogram router detects when it is not running as root,
3765 outputs suitable debugging information if -d is set, and then runs
3766 the subprocess without attempting to change uid/gid.
3768 PH/15 Minor change to Makefile for building test_host (undocumented testing
3771 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3772 additional section of a DNS packet that returns MX or SRV records.
3773 Instead, it always explicitly searches for A/AAAA records. This avoids
3774 major problems that occur when a DNS server includes only records of one
3775 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3776 fixed another bug: if SRV records were looked up and the corresponding
3777 address records were *not* found in the additional section, the port
3778 values from the SRV records were lost.
3780 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3781 using the correct key (the original address) when searching the retry
3782 rules in order to find which one to use for generating the retry hint.
3784 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3785 adding the default one. Similarly, if it contains a Reply-To: header, the
3786 errors_reply_to option, if set, is not used.
3788 PH/19 When calculating a retry time, Exim used to measure the "time since
3789 failure" by looking at the "first failed" field in the retry record. Now
3790 it does not use this if it is later than than the arrival time of the
3791 message. Instead it uses the arrival time. This makes for better
3792 behaviour in cases where some deliveries succeed, thus re-setting the
3793 "first failed" field. An example is a quota failure for a huge message
3794 when small messages continue to be delivered. Without this change, the
3795 "time since failure" will always be short, possible causing more frequent
3796 delivery attempts for the huge message than are intended.
3797 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3799 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3800 $1, $2, $3) because the numerical variables can be reset during some
3801 expansion items (e.g. "match"), thereby losing the authentication data.
3803 PH/21 Make -bV show the size of off_t variables so that the test suite can
3804 decide whether to run tests for quotas > 2G.
3806 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3807 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3808 filecount value is greater than 2G or if a quota value is greater than 2G
3809 on a system where the size of off_t is not greater than 4, a panic error
3812 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3813 never match. The debug and -bh output now contains an explicit error
3814 message indicating a malformed IPv4 address or mask.
3816 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3817 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3818 PH/23 above applies.
3820 PH/25 Do not write to syslog when running in the test harness. The only
3821 occasion when this arises is a failure to open the main or panic logs
3822 (for which there is an explicit test).
3824 PH/26 Added the /no_tell option to "control=freeze".
3826 PH/27 If a host name lookup failed very early in a connection, for example, if
3827 the IP address matched host_lookup and the reverse lookup yielded a name
3828 that did not have a forward lookup, an error message of the form "no IP
3829 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3830 could be logged. Now it outputs the IP address instead of "NULL".
3832 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3833 allows the sender and the authenticated sender to be set when
3834 submitting a message from within Exim. Since child_open_exim() is
3835 documented for local_scan(), the new function should be too.
3837 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3838 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3839 results in an empty string is now treated as unset.
3841 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3843 PH/31 Added sender_verify_fail logging option.
3845 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3846 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3847 tidied the source and removed it altogether.
3849 PH/33 When a queue run was abandoned because the load average was too high, a
3850 log line was always written; now it is written only if the queue_run log
3851 selector is set. In addition, the log line for abandonment now contains
3852 information about the queue run such as the pid. This is always present
3853 in "start" and "stop" lines but was omitted from the "abandon" line.
3855 PH/34 Omit spaces between a header name and the colon in the error message that
3856 is given when verify = headers_syntax fails (if there are lots of them,
3857 the message gets confusing).
3859 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3860 names, as there are now some PTR records that contain slashes. This check
3861 is only to protect against broken name servers that fall over on strange
3862 characters, so the fact that it applies to all lookups doesn't matter.
3864 PH/36 Now that the new test suite is complete, we can remove some of the
3865 special code in Exim that was needed for the old test suite. For example,
3866 sorting DNS records because real resolvers return them in an arbitrary
3867 order. The new test suite's fake resolver always returns records in the
3870 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3871 bounces) except when queue_only is set, to avoid logging races between
3872 the different processes.
3874 PH/38 Panic-die if .include specifies a non-absolute path.
3876 PH/39 A tweak to the "H" retry rule from its user.
3878 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3879 a label. They prevented compilation on older perls.
3881 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3882 a warning to be raised on newish perls.
3884 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3885 on queue. Changes to match documented behaviour of showing count of
3886 messages matching specified criteria.
3888 PH/40 Changed the default ident timeout from 30s to 5s.
3890 PH/41 Added support for the use of login_cap features, on those BSD systems
3891 that have them, for controlling the resources used by pipe deliveries.
3893 PH/42 The content-scanning code uses fopen() to create files in which to put
3894 message data. Previously it was not paying any attention to the mode of
3895 the files. Exim runs with umask(0) because the rest of the code creates
3896 files with open(), and sets the required mode explicitly. Thus, these
3897 files were ending up world-writeable. This was not a big issue, because,
3898 being within the spool directory, they were not world-accessible. I have
3899 created a function called modefopen, which takes an additional mode
3900 argument. It sets umask(777), creates the file, chmods it to the required
3901 mode, then resets the umask. All the relevant calls to fopen() in the
3902 content scanning code have been changed to use this function.
3904 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3905 to 24 hours. This avoids potential overflow problems when processing G
3906 and H retry rules. I suspect nobody ever tinkers with this value.
3908 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3910 PH/45 When the plaintext authenticator is running as a client, the server's
3911 challenges are checked to ensure they are valid base64 strings. By
3912 default, the authentication attempt is cancelled if an invalid string is
3913 received. Setting client_ignore_invalid_base64 true ignores these errors.
3914 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3915 they are received. Thus, the responses can be made to depend on the
3916 challenges. If an invalid string is ignored, an empty string is placed in
3919 PH/46 Messages that are created by the autoreply transport now contains a
3920 References: header, in accordance with RFCs 2822 and 3834.
3922 PH/47 Added authenticated_sender_force to the smtp transport.
3924 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3926 PH/49 Installed latest patch from the Sieve maintainer.
3928 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3929 was also set, the appendfile transport was unnecessarily scanning a
3930 directory of message files (e.g. for maildir delivery) to find the count
3931 of files (along with the size), even though it did not need this
3932 information. It now does the scan only if it needs to find either the
3933 size of the count of files.
3935 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3937 PH/52 Two bugs concerned with error handling when the smtp transport is
3940 (i) Exim was not creating retry information for temporary errors given
3941 for individual recipients after the DATA command when the smtp transport
3942 was used in LMTP mode. This meant that they could be retried too
3943 frequently, and not timed out correctly.
3945 (ii) Exim was setting the flag that allows error details to be returned
3946 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3947 recipients that were returned after the DATA command.
3949 PH/53 This is related to PH/52, but is more general: for any failing address,
3950 when detailed error information was permitted to be returned to the
3951 sender, but the error was temporary, then after the final timeout, only
3952 "retry timeout exceeded" was returned. Now it returns the full error as
3953 well as "retry timeout exceeded".
3955 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3956 do this, and (what is worse) MTAs that accept it.
3958 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3959 will now be deprecated.
3961 PH/56 New os.c-cygwin from the Cygwin maintainer.
3963 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3964 formats (previously only available in exim formats via -bpr, -bpru,
3965 and -bpra. Now also available in native and exiqgrep formats)
3967 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3968 with very large, slow to parse queues
3970 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3972 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3974 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3975 responses to authentication challenges, though it was showing the
3976 challenges; (ii) I've removed the CR characters from the debug output for
3979 PH/58 Allow for the insertion of a newline as well as a space when a string
3980 is turned into more than one encoded-word during RFC 2047 encoding. The
3981 Sieve code now uses this.
3983 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3984 data_4xx, lost_connection, tls_required.
3986 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3987 message was being sent as an SMTP response.
3989 PH/61 Add -l and -k options to exicyclog.
3991 PH/62 When verifying, if an address was redirected to one new address, so that
3992 verification continued, and the new address failed or deferred after
3993 having set something in $address_data, the value of $address_data was not
3994 passed back to the ACL. This was different to the case when no
3995 redirection occurred. The value is now passed back in both cases.
3997 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3998 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3999 use login_cap.h, so on its own it isn't the distinguishing feature. The
4000 new name refers directly to the setclassresources() function.
4002 PH/65 Added configuration files for NetBSD3.
4004 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4006 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4007 is preferred over IPv4.
4009 PH/68 The bounce_return_message and bounce_return_body options were not being
4010 honoured for bounces generated during the reception of non-SMTP messages.
4011 In particular, this applied to messages rejected by the ACL. This bug has
4012 been fixed. However, if bounce_return_message is true and bounce_return_
4013 body is false, the headers that are returned for a non-SMTP message
4014 include only those that have been read before the error was detected.
4015 (In the case of an ACL rejection, they have all been read.)
4017 PH/69 The HTML version of the specification is now built in a directory called
4018 spec_html instead of spec.html, because the latter looks like a path with
4019 a MIME-type, and this confuses some software.
4021 PH/70 Catch two compiler warnings in sieve.c.
4023 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4024 function verify_get_ident() calls ip_connect() to connect a socket, but
4025 if the "connect()" function timed out, ip_connect() used to close the
4026 socket. However, verify_get_ident() also closes the socket later, and in
4027 between Exim writes to the log, which may get opened at this point. When
4028 the socket was closed in ip_connect(), the log could get the same file
4029 descriptor number as the socket. This naturally causes chaos. The fix is
4030 not to close the socket in ip_connect(); the socket should be closed by
4031 the function that creates it. There was only one place in the code where
4032 this was missing, in the iplookup router, which I don't think anybody now
4033 uses, but I've fixed it anyway.
4035 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4036 well as to direct DNS lookups. Otherwise the handling of names in host
4037 lists is inconsistent and therefore confusing.
4043 PH/01 Two changes to the default runtime configuration:
4045 (1) Move the checks for relay_from_hosts and authenticated clients from
4046 after to before the (commented out) DNS black list checks.
4048 (2) Add control=submission to the relay_from_hosts and authenticated
4049 clients checks, on the grounds that messages accepted by these
4050 statements are most likely to be submissions.
4052 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4054 (1) Generate an error if the third argument for the ${prvs expansion is
4057 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4060 (3) Reset the variables that are obtained from the first argument of
4061 ${prvscheck and used in the second argument before leaving the code,
4062 because their memory is reclaimed, so using them afterwards may do
4065 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4066 one (it's much easier than Tom thought :-).
4068 (5) Because of (4), we can now allow for the use of $prvscheck_result
4069 inside the third argument.
4071 PH/03 For some reason, the default setting of PATH when running a command from
4072 a pipe transport was just "/usr/bin". I have changed it to
4075 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4076 anything to be listed in the output from -bV.
4078 PH/05 When a filter generated an autoreply, the entire To: header line was
4079 quoted in the delivery log line, like this:
4081 => >A.N.Other <ano@some.domain> <original@ddress> ...
4083 This has been changed so that it extracts the operative address. There
4084 may be more than one such address. If so, they are comma-separated, like
4087 => >ano@some.domain,ona@other.domain <original@ddress> ...
4089 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4090 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4091 not being looked up in the rDNS to get a host name, Exim was showing the
4092 IP address twice in Received: lines, even though the IP addresses were
4093 identical. For example:
4095 Received: from [1.2.3.4] (helo=[1.2.3.4])
4097 However, if the real host name was known, it was omitting the HELO data
4098 if it matched the actual IP address. This has been tidied up so that it
4099 doesn't show the same IP address twice.
4101 PH/07 When both +timestamp and +memory debugging was on, the value given by
4102 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4103 called by the debug printing, thereby overwriting the timestamp buffer.
4104 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4106 PH/08 When the original message was included in an autoreply transport, it
4107 always said "this is a copy of the message, including all the headers",
4108 even if body_only or headers_only was set. It now gives an appropriate
4111 PH/09 Applied a patch from the Sieve maintainer which:
4113 o fixes some comments
4114 o adds the (disabled) notify extension core
4115 o adds some debug output for the result of if/elsif tests
4116 o points to the current vacation draft in the documentation
4117 and documents the missing references header update
4121 o fixes a bug in processing the envelope test (when testing
4122 multiple envelope elements, the last element determined the
4125 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4126 Electronic Mail") by including:
4128 Auto-submitted: auto-generated
4130 in the messages that it generates (bounce messages and others, such as
4131 warnings). In the case of bounce messages for non-SMTP messages, there was
4132 also a typo: it was using "Auto_submitted" (underscore instead of
4133 hyphen). Since every message generated by Exim is necessarily in response
4134 to another message, thes have all been changed to:
4136 Auto-Submitted: auto-replied
4138 in accordance with these statements in the RFC:
4140 The auto-replied keyword:
4142 - SHOULD be used on messages sent in direct response to another
4143 message by an automatic process,
4145 - MUST NOT be used on manually-generated messages,
4147 - MAY be used on Delivery Status Notifications (DSNs) and Message
4148 Disposition Notifications (MDNs),
4150 - MUST NOT be used on messages generated by automatic or periodic
4151 processes, except for messages which are automatic responses to
4154 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4155 to the default Received: header definition.
4157 PH/12 Added log selector acl_warn_skipped (default on).
4159 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4160 variables because (a) they are in the wrong storage pool and (b) even if
4161 they were copied, it wouldn't work properly because of the caching.
4163 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4164 checking when decoding. Apparently there are clients that generate
4165 overlong encoded strings. Why am I not surprised?
4167 PH/15 If the first argument of "${if match_address" was not empty, but did not
4168 contain an "@" character, Exim crashed. Now it writes a panic log message
4169 and treats the condition as false.
4171 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4173 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4174 extension "envelope-auth". The code is finished and in agreement with
4175 other implementations, but there is no documentation so far and in fact,
4176 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4177 not changing the active code.
4179 Print executed "if" and "elsif" statements when debugging is used. This
4180 helps a great deal to understand what a filter does.
4182 Document more things not specified clearly in RFC3028. I had all this
4183 sorted out, when out of a sudden new issues came to my mind. Oops."
4185 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4188 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4189 canonical form (as documented). However, after a host name lookup from
4190 the IP address, check_host() was doing a simple string comparison with
4191 addresses acquired from the DNS when checking that the found name did
4192 have the original IP as one of its addresses. Since any found IPv6
4193 addresses are likely to be in abbreviated form, the comparison could
4194 fail. Luckily, there already exists a function for doing the comparison
4195 by converting both addresses to binary, so now that is used instead of
4196 the text comparison.
4198 PH/20 There was another similar case to PH/19, when a complete host name was
4199 given in a host list; looking up its IP address could give an abbreviated
4200 form, whereas the current host's name might or might not be abbreviated.
4201 The same fix has been applied.
4207 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4208 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4211 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4212 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4214 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4216 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4217 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4218 Also, for "Auto-Submitted", treat anything other than "no" as
4219 non-personal, in accordance with RFC 3834. (Previously it treated
4220 anything starting "auto-" as non-personal.)
4222 TF/01 The control=submission/name=... option had a problem with syntax
4223 errors if the name included a slash character. The /name= option
4224 now slurps the rest of the string, so it can include any characters
4225 but it must come last in the list of options (after /sender_retain
4228 PH/05 Some modifications to the interface to the fake nameserver for the new
4236 TK/01 Added the "success_on_redirect" address verification option. See
4237 NewStuff for rationale and an example.
4239 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4241 PH/02 Patch to exigrep to allow it to work on syslog lines.
4243 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4244 fread() to skip over the body file's header line, because in Cygwin the
4245 header line is locked and is inaccessible.
4247 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4248 co-exist for some time) to make it clear that it is the Exim ID that is
4249 referenced, not the Message-ID: header line.
4251 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4252 string_format() function, because snprintf() does not exist on all
4255 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4256 ${stat: expansion item.
4258 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4259 protocol synchronization error", to keep the pedants happy.
4261 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4262 well as for IRIX systems, when gcc is being used. See the host.c source
4265 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4267 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4270 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4271 transport and to the smtp transport in LMTP mode.
4273 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4275 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4276 run a filter in a subprocess. This could lead to confusion in subsequent
4277 lookups in the parent process. There should also be a search_tidyup() at
4278 the end of the subprocess.
4280 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4281 only if the host matched helo_try_verify_hosts, which caused the
4282 verification to occur when the EHLO/HELO command was issued. The ACL just
4283 tested the remembered result. Now, if a previous verification attempt has
4284 not happened, "verify = helo" does it there and then.
4286 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4288 TK/03 Fix log output including CR from clamd.
4290 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4291 exist provoked a memory error which could cause a segfault.
4293 PH/15 Installed PCRE 6.2
4295 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4297 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4298 of the problem. Specifically, suggested +O2 rather than +O1 for the
4301 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4303 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4304 record, the port was not correctly logged when the outgoing_port log
4305 selector was set (it logged the transort's default port).
4307 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4308 fallback_hosts, and "hosts" in the smtp transport.
4310 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4311 host errors such as "Connection refused".
4313 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4314 authentication with radiusclient 0.4.9:
4316 - Error returned from rc_read_config was caught wrongly
4317 - Username/password not passed on to radius server due to wrong length.
4319 The presumption is that some radiusclient API changes for 4.51/PH/17
4320 were not taken care of correctly. The code is still untested by me (my
4321 Linux distribution still has 0.3.2 of radiusclient), but it was
4322 contributed by a Radius user.
4324 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4325 expanding the "port" option of the smtp transport.
4327 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4328 while reading a MIME header. Thanks to Tom Hughes for a patch.
4330 PH/24 Include config.h inside local_scan.h so that configuration settings are
4333 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4334 that in an ACL for RCPT (for example), you can examine exactly what was
4337 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4338 commands, but it was not correctly comparing the address with the actual
4339 client host address. Thus, it would show the EHLO address in Received:
4340 header lines when this was not necessary.
4342 PH/27 Added the % operator to ${eval:}.
4344 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4345 it should be ignoring failures (because with -C, for example, it has lost
4346 privilege). It wasn't ignoring creation failures other than "already
4349 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4352 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4353 because an input line was too long, either on its own, or by virtue of
4354 too many continuations, the temporary file was not being removed, and the
4355 return code was incorrect.
4357 PH/31 Missing "BOOL" in function definition in filtertest.c.
4359 PH/32 Applied Sieve patches from the maintainer.
4361 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4363 PH/33 Added "verify = not_blind".
4365 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4366 Local/Makefile (with some defaults set). These are used in built scripts
4367 such as exicyclog, but they have never been used in the exim_install
4368 script (though there are many overriding facilities there). I have
4369 arranged that the exim_install script now takes note of these two
4372 PH/35 Installed configuration files for Dragonfly.
4374 PH/36 When a locally submitted message by a trusted user did not contain a
4375 From: header, and the sender address was obtained from -f or from an SMTP
4376 MAIL command, and the trusted user did not use -F to supply a sender
4377 name, $originator_name was incorrectly used when constructing a From:
4378 header. Furthermore, $originator_name was used for submission mode
4379 messages from external hosts without From: headers in a similar way,
4380 which is clearly wrong.
4382 PH/37 Added control=suppress_local_fixups.
4384 PH/38 When log_selector = +received_sender was set, and the addition of the
4385 sender made the log line's construction buffer exactly full, or one byte
4386 less than full, an overflow happened when the terminating "\n" was
4389 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4390 when the result of a list match is failure because a DNS lookup failed.
4392 PH/40 RM_COMMAND is now used in the building process.
4394 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4395 the "build-* directories that it finds.
4397 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4398 address in a domain literal was a prefix of an interface address.
4400 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4401 when verifying a sender address, unless rewrite_headers is false.
4403 PH/44 Wrote a long comment about why errors_to addresses are verified as
4404 recipients, not senders.
4406 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4407 the ratelimit ACL was added.
4409 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4411 PH/46 Added extra information about PostgreSQL errors to the error string.
4413 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4414 avoiding the need to install special zones in a real server. This is
4415 backwards compatible; if it can't find the fake resolver, it drops back.
4416 Thus, both old and new test suites can be run.
4418 TF/02 Added util/ratelimit.pl
4420 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4421 clock is set back in time.
4423 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4424 Candler <B.Candler@pobox.com>.
4426 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4427 OK for addresses that are the result of redirections.
4429 PH/48 A number of further additions for the benefit of the new test suite,
4430 including a fake gethostbyname() that interfaces to the fake DNS resolver
4433 TF/06 The fix for widen_domains has also been applied to qualify_single and
4434 search_parents which are the other dnslookup options that can cause
4437 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4440 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4442 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4443 service" if it encountered an MX record with an empty target hostname.
4444 The message is now "an MX or SRV record indicated no SMTP service".
4446 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4447 if the DNS of the sending site is misconfigured. This is quite a
4448 common situation. This change restores the behaviour of treating a
4449 helo verification defer as a failure.
4451 PH/51 If self=fail was set on a router, the bounce message did not include the
4452 actual error message.
4458 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4460 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4461 command itself ended in error, the underlying message about the transport
4462 filter timeout was being overwritten with the pipe command error. Now the
4463 underlying error message should be appended to the second error message.
4465 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4467 PH/02 Reduce the amount of output that "make" produces by default. Full output
4468 can still be requested.
4470 PH/03 The warning log line about a condition test deferring for a "warn" verb
4471 was being output only once per connection, rather than after each
4472 occurrence (because it was using the same function as for successful
4473 "warn" verbs). This seems wrong, so I have changed it.
4475 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4476 it should not have, which might have caused a crash in the right
4477 circumstances, but probably never did.
4479 PH/04 Installed a modified version of Tony Finch's patch to make submission
4480 mode fix the return path as well as the Sender: header line, and to
4481 add a /name= option so that you can make the user's friendly name appear
4484 TF/03 Added the control = fakedefer ACL modifier.
4486 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4487 Mark Lowes for thorough testing.
4489 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4491 TK/03 Merged latest SRS patch from Miles Wilton.
4493 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4494 with the definition in sysexits.h (which is #included earlier).
4495 Fortunately, Exim does not actually use EX_OK. The code used to try to
4496 preserve the sysexits.h value, by assuming that macro definitions were
4497 scanned for macro replacements. I have been disabused of this notion,
4498 so now the code just undefines EX_OK before #including unistd.h.
4500 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4501 in the smtp transport. When a block could not be written in a single
4502 write() function, the timeout was being re-applied to each part-write.
4503 This seems wrong - if the receiver was accepting one byte at a time it
4504 would take for ever. The timeout is now adjusted when this happens. It
4505 doesn't have to be particularly precise.
4507 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4508 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4510 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4511 without a domain if the check to <postmaster@domain> fails.
4513 SC/01 Eximstats: added -xls and the ability to specify output files
4514 (patch written by Frank Heydlauf).
4516 SC/02 Eximstats: use FileHandles for outputting results.
4518 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4520 SC/04 Eximstats: fixed display of large numbers with -nvr option
4522 SC/05 Eximstats: fixed merging of reports with empty tables.
4524 SC/06 Eximstats: added the -include_original_destination flag
4526 SC/07 Eximstats: removed tabs and trailing whitespace.
4528 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4530 TK/06 MBOX spool code: Add real "From " MBOX separator line
4531 so the .eml file is really in mbox format (even though
4532 most programs do not really care). Patch from Alex Miller.
4534 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4535 The latter is generated from $received_to and is only set if the
4536 message has one envelope recipient. SA can use these headers,
4537 obviously out-of-the-box. Patch from Alex Miller.
4539 PH/08 The ${def test on a variable was returning false if the variable's
4540 value was "0", contrary to what the specification has always said!
4541 The result should be true unless the variable is empty.
4543 PH/09 The syntax error of a character other than { following "${if
4544 def:variable_name" (after optional whitespace) was not being diagnosed.
4545 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4546 accidental colon was present, for example, could give incorrect results.
4548 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4549 result is used (not including appendfile, where other changes are about
4552 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4553 This involved changing a lot of size variables from int to off_t. It
4554 should work with maildirs and everything.
4556 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4557 spamd dying while we are connected to it.
4559 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4562 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4563 function for BDB 4.3.
4565 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4567 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4568 the sources for PCRE have been re-arranged and more files are now
4571 PH/15 The code I had for printing potentially long long variables in PH/11
4572 above was not the best (it lost precision). The length of off_t variables
4573 is now inspected at build time, and an appropriate printing format (%ld
4574 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4575 to be "long long int" or "long int". This is needed for the internal
4576 formatting function string_vformat().
4578 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4579 the configuration file to be ":syslog", then the script "guesses" where
4580 the logs files are, rather than using the compiled in default. In our
4581 case the guess is not the same as the compiled default, so the script
4582 suddenly stopped working when I started to use syslog. The patch checks
4583 to see if log_file_path is "". If so, it attempts to read it from exim
4584 with no configuration file to get the compiled in version, before it
4585 falls back to the previous guessing code."
4587 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4588 implementing BATV in an Exim configuration. See NewStuff for the gory
4591 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4592 Makefile that are specific to HP-UX.
4594 PH/18 If the "use_postmaster" option was set for a recipient callout together
4595 with the "random" option, the postmaster address was used as the MAIL
4596 FROM address for the random test, but not for the subsequent recipient
4597 test. It is now used for both.
4599 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4600 patch removes a few documentation additions to RFC 3028, because the
4601 latest draft now contains them. It adds the new en;ascii-case comparator
4602 and a new error check for 8bit text in MIME parts. Comparator and
4603 require names are now matched exactly. I enabled the subaddress
4604 extension, but it is not well tested yet (read: it works for me)."
4606 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4607 rework some of the code of TK/09 above to avoid the hardwired use of
4608 "%lld" and "long long". Replaced the call to snprintf() with a call to
4611 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4612 records point to non-existent hosts", "retry timeout exceeded", and
4613 "retry time not reached for any host after a long failure period".
4615 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4616 experimental DomainKeys support:
4618 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4619 (2) On an error such as an illegally used "control", the wrong name for
4620 the control was given.
4622 These problems did NOT occur unless DomainKeys support was compiled.
4624 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4626 PH/24 Added ${if match_ip condition.
4628 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4629 databases so that it will be absolutely obvious if a crash occurs in the
4630 DB library. This is a regular occurrence (often caused by mis-matched
4633 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4634 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4635 picked up on a user's system that detects such things. There doesn't seem
4636 to be a gcc warning option for this - only an attribute that has to be
4637 put on the function's prototype. It seems that in Fedora Core 4 they have
4638 set this on a number of new functions. No doubt there will be more in due
4641 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4642 specify a transport. However, if an address that was verified by such a
4643 router was the subject of a callout, Exim crashed because it tried to
4644 read the rcpt_include_affixes from the non-existent transport. Now it
4645 just assumes that the setting of that option is false. This bug was
4646 introduced by 4.51/PH/31.
4648 PH/28 Changed -d+all to exclude +memory, because that information is very
4649 rarely of interest, but it makes the output a lot bigger. People tend to
4650 do -d+all out of habit.
4652 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4653 code in os-type was giving problems when libc.so lives in lib64, like on
4656 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4657 aren't the modern standard, and it seems that some systems' include files
4658 don't always have them. Exim was already checking for some of the newer
4659 ones like T_AAAA, and defining it itself. I've added checks for all the
4660 record types that Exim uses.
4662 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4663 not automatically generating a new one, as it is supposed to. This
4664 prevented TLS from working. If the file did exist, but contained invalid
4665 data, a new version was generated, as expected. It was only the case of a
4666 non-existent file that was broken.
4668 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4669 with a change in libdomainkeys > 0.64.
4671 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4672 from DNS. If the selector record carries the flag, it now has
4673 precedence over the domain-wide flag.
4675 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4677 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4678 the use of a port name that isn't defined in /etc/services) occurred, the
4679 message was deferred as in a normal delivery, and thus remained on the
4680 spool, instead of being failed because of the mua_wrapper setting. This
4681 is now fixed, and I tidied up some of the mua_wrapper messages at the
4684 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4685 the messages in a hash of arrays rather than using individual hashes.
4686 This is a bit cleaner and results in dramatic memory savings, albeit
4687 at a slight CPU cost.
4689 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4690 as requested by Marc Sherman.
4692 SC/10 Eximstats: added histograms for user specified patterns as requested
4695 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4697 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4698 fopen() in the content-scanning modules that did not already have it.
4704 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4705 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4707 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4709 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4711 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4712 to test Sieve filters that use "vacation".
4714 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4715 that changes the way the GnuTLS parameters are stored in the cache file.
4716 The new format can be generated externally. For backward compatibility,
4717 if the data in the cache doesn't make sense, Exim assumes it has read an
4718 old-format file, and it generates new data and writes a new file. This
4719 means that you can't go back to an older release without removing the
4722 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4723 work if there are any delivery delays because "one_time" forces the
4724 parent to be marked "delivered", so its unseen clone is never tried
4725 again. For this reason, Exim now forbids the simultaneous setting of
4728 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4729 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4730 entry if you want to know the details. The fix, however, neglected to
4731 consider the case when local delivery batching is involved. The test for
4732 "previously delivered" was not happening when checking to see if an
4733 address could be batched with a previous (undelivered) one; under
4734 certain circumstances this could lead to multiple deliveries to the same
4737 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4738 in its include files, and this causes problems building Exim.
4740 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4741 header_syntax) but Exim was just ignoring anything given after a slash.
4742 In particular, this caused confusion with an attempt to use "verify =
4743 reverse_host_lookup/defer_ok". An error is now given when options are
4744 supplied for verify items that do not have them. (Maybe reverse_host_
4745 lookup should have a defer_ok option, but that's a different point.)
4747 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4748 defined by RFC 821) to 2048, because there were problems with some AUTH
4749 commands, and RFC 1869 says the size should be increased for extended
4750 SMTP commands that take arguments.
4752 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4755 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4756 "unknown" error; now it says that the functionality isn't in the binary.
4758 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4759 an address' error message when a string expansion fails (syntax or
4760 whatever). Otherwise the password may appear in the log. Following change
4761 PH/42 below, there is no longer a chance of it appearing in a bounce
4764 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4766 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4767 of its addresses was ever tried. (Bugzilla bug #2.)
4769 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4770 the result incorrectly in the debug output. (It correctly added a newline
4771 to what was transported.)
4773 TF/01 Added $received_time.
4775 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4776 commented out examples of how to interface to a virus scanner and to
4777 SpamAssassin. Also added commented examples of av_scanner and
4778 spamd_address settings.
4780 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4781 and controls are allowed in which ACLs. There were a couple of minor
4782 errors. Some of the entries in the conditions table (which is a table of
4783 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4784 negation of where the condition IS allowed.
4786 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4788 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4789 header file does not have a version number, so I've had to invent a new
4790 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4791 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4792 radiusclient), but it was contributed by a Radius user.
4794 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4795 files or directories, for OpenSSL.
4797 PH/19 When an Exim process that is running as root has to create an Exim log
4798 file, it does so in a subprocess that runs as exim:exim so as to get the
4799 ownership right at creation (otherwise, other Exim processes might see
4800 the file with the wrong ownership). There was no test for failure of this
4801 fork() call, which would lead to the process getting stuck as it waited
4802 for a non-existent subprocess. Forks do occasionally fail when resources
4803 run out. I reviewed all the other calls to fork(); they all seem to check
4806 PH/20 When checking for unexpected SMTP input at connect time (before writing
4807 the banner), Exim was not dealing correctly with a non-positive return
4808 from the read() function. If the client had disconnected by this time,
4809 the result was a log entry for a synchronization error with an empty
4810 string after "input=" when read() returned zero. If read() returned -1
4811 (an event I could not check), uninitialized data bytes were printed.
4812 There were reports of junk text (parts of files, etc) appearing after
4815 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4817 PH/22 Added support for macro redefinition, and (re)definition in between
4818 driver and ACL definitions.
4820 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4821 forgetting to use the resulting value; it was using the unexpanded value.
4823 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4824 hadn't been configured. The fix is from Juergen Kreileder, who
4825 understands it better than I do:
4827 "Here's what I see happening with three configured cyrus_sasl
4828 authenticators configured (plain, login, cram-md5):
4830 On startup auth_cyrus_sasl_init() gets called for each of these.
4831 This means three calls to sasl_listmech() without a specified mech_list.
4832 => SASL tests which mechs of all available mechs actually work
4833 => three warnings about OTP not working
4834 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4836 With the patch, sasl_listmech() also gets called three times. But now
4837 SASL's mech_list option is set to the server_mech specified in the the
4838 authenticator. Or in other words, the answer from sasl_listmech()
4839 gets limited to just the mech you're testing for (which is different
4841 => the return list contains just 'plain' or 'login', 'cram-md5' or
4842 nothing depending on the value of ob->server_mech.
4844 I've just tested the patch: Authentication still works fine,
4845 unavailable mechs specified in the exim configuration are still
4846 caught, and the auth.log warnings about OTP are gone."
4848 PH/25 When debugging is enabled, the contents of the command line are added
4849 to the debugging output, even when log_selector=+arguments is not
4852 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4853 answer is "GNU", and only if the return is "GNU/something" is the answer
4856 PH/27 $acl_verify_message is now set immediately after the failure of a
4857 verification in an ACL, and so is available in subsequent modifiers. In
4858 particular, the message can be preserved by coding like this:
4860 warn !verify = sender
4861 set acl_m0 = $acl_verify_message
4863 Previously, $acl_verify_message was set only while expanding "message"
4864 and "log_message" when a very denied access.
4866 PH/28 Modified OS/os.c-Linux with
4868 -#ifndef OS_LOAD_AVERAGE
4869 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4871 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4872 nomenclature these days.)
4874 PH/29 Installed patch from the Sieve maintainer that adds the options
4875 sieve_useraddress and sieve_subaddress to the redirect router.
4877 PH/30 In these circumstances:
4878 . Two addresses routed to the same list of hosts;
4879 . First host does not offer TLS;
4880 . First host accepts first address;
4881 . First host gives temporary error to second address;
4882 . Second host offers TLS and a TLS session is established;
4883 . Second host accepts second address.
4884 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4885 and peerdn, if requested) that were in fact used only for the second
4888 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4889 attention to any local part prefix or suffix that was matched by the
4890 router that accepted the address. It now behaves in the same way as it
4891 does for delivery: the affixes are removed from the local part unless
4892 rcpt_include_affixes is set on the transport.
4894 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4895 timeout during the DATA phase of an incoming message.
4897 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4898 applied a patch sanctioned by the Sieve maintainer.
4900 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4901 the uid or gid is negative. A case of a negative gid caused this to be
4902 noticed. The fix allows for either to be negative.
4904 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4905 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4908 PH/36 The change PH/12 above was broken. Fixed it.
4910 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4911 the grounds that routing the same address twice would always produce the
4912 same answer. This might have been true once, but it is certainly no
4913 longer true now. Routing a child address may depend on the previous
4914 routing that produced that child. Some complicated redirection strategies
4915 went wrong when messages had multiple recipients, and made Exim's
4916 behaviour dependent on the order in which the addresses were given.
4918 I have moved the duplicate checking until after the routing is complete.
4919 Exim scans the addresses that are assigned to local and remote
4920 transports, and removes any duplicates. This means that more work will be
4921 done, as duplicates will always all be routed, but duplicates are
4922 presumably rare, so I don't expect this is of any significance.
4924 For deliveries to pipes, files, and autoreplies, the duplicate checking
4925 still happens during the routing process, since they are not going to be
4928 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4929 It corrects a timeout issue with spamd. This is Ian's comment: "The
4930 background is that sometimes spamd either never reads data from a
4931 connection it has accepted, or it never writes response data. The exiscan
4932 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4933 blindly assumes that writes won't block so it may never time out."
4935 PH/39 Allow G after quota size as well as K and M.
4937 PH/40 The value set for $authenticated_id in an authenticator may not contain
4938 binary zeroes or newlines because the value is written to log lines and
4939 to spool files. There was no check on this. Now the value is run through
4940 the string_printing() function so that such characters are converted to
4941 printable escape sequences.
4943 PH/41 $message_linecount is a new variable that contains the total number of
4944 lines in the message. Compare $body_linecount, which is the count for the
4947 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4948 bounce and delay warning messages, except in certain special cases, which
4951 (a) An SMTP error message from a remote host;
4952 (b) A message specified in a :fail: redirection;
4953 (c) A message specified in a "fail" command in a system filter;
4954 (d) A message specified in a FAIL return from the queryprogram router;
4955 (e) A message specified by the cannot_route_message router option.
4957 In these cases only, Exim does include the error details in bounce and
4958 warning messages. There are also a few cases where bland messages such
4959 as "unrouteable address" or "local delivery error" are given.
4961 PH/43 $value is now also set for the "else" part of a ${run expansion.
4963 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4964 being worked on, but at least Exim now implements the latest version to
4967 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4968 process to complete was treated as a delivery failure, a timeout while
4969 writing the message to the pipe was logged, but erroneously treated as a
4970 successful delivery. Such timeouts include transport filter timeouts. For
4971 consistency with the overall process timeout, these timeouts are now
4972 treated as errors, giving rise to delivery failures by default. However,
4973 there is now a new Boolean option for the pipe transport called
4974 timeout_defer, which, if set TRUE, converts the failures into defers for
4975 both kinds of timeout. A transport filter timeout is now identified in
4978 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4979 systems where "make" and "gmake" are different, calling "gmake" at top
4980 level broke things. I've arranged for the value of $(MAKE) to be passed
4981 from the Makefile to this script so that it can call the same version of
4985 A note about Exim versions 4.44 and 4.50
4986 ----------------------------------------
4988 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4989 changes of various kinds. As a consequence, a big documentation update was
4990 needed. This delayed the release for rather longer than seemed good, especially
4991 in the light of a couple of (minor) security issues. Therefore, the changes
4992 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4993 release. So 4.44 and 4.50 are in effect two different branches that both start
4996 I have left the 4.50 change log unchanged; it contains all the changes since
4997 4.43. The change log for 4.44 is below; many of its items are identical to
4998 those for 4.50. This seems to be the most sensible way to preserve the
4999 historical information.
5005 1. Minor wording change to the doc/README.SIEVE file.
5007 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5008 computation of the current number of files was incorrect.
5010 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5011 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5014 4. Give more explanation in the error message when the command for a transport
5015 filter fails to execute.
5017 5. There are several places where Exim runs a non-Exim command in a
5018 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5019 was being done only for the command run by the queryprogram router. It is
5020 now done for all such subprocesses. The other cases are: ${run, transport
5021 filters, and the commands run by the lmtp and pipe transports.
5023 6. Added CONFIGURE_GROUP build-time option.
5025 7. Some older OS have a limit of 256 on the maximum number of file
5026 descriptors. Exim was using setrlimit() to set 1000 as a large value
5027 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5028 systems. I've change it so that if it can't get 1000, it tries for 256.
5030 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5031 was an oversight, and furthermore, ever since the addition of extra
5032 controls (e.g. 4.43/32), the checks on when to allow different forms of
5033 "control" were broken. There should now be diagnostics for all cases when a
5034 control that does not make sense is encountered.
5036 9. Added the /retain_sender option to "control=submission".
5038 10. $recipients is now available in the predata ACL (oversight).
5040 11. Tidy the search cache before the fork to do a delivery from a message
5041 received from the command line. Otherwise the child will trigger a lookup
5042 failure and thereby defer the delivery if it tries to use (for example) a
5043 cached ldap connection that the parent has called unbind on.
5045 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5046 of $address_data from the recipient verification was clobbered by the
5047 sender verification.
5049 13. The value of address_data from a sender verification is now available in
5050 $sender_address_data in subsequent conditions in the ACL statement.
5052 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5054 15. Added a new option "connect=<time>" to callout options, to set a different
5057 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5058 was its contents. (It was OK if the option was not defined at all.)
5060 17. A "Completed" log line is now written for messages that are removed from
5061 the spool by the -Mrm option.
5063 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5064 information about exactly what failed.
5066 19. Added -dd to debug only the daemon process.
5068 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5069 handles timeouts, both on the server side and network timeouts. Renamed the
5070 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5072 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5073 It is now set to "smtps".
5075 22. $host_address is now set to the target address during the checking of
5076 ignore_target_hosts.
5078 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5079 being passed; this would have caused $sender_host_name to have been used if
5080 matching the list had actually called for a host name (not very likely,
5081 since this list is usually IP addresses). A host name is now passed as
5084 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5085 code that specifies a non-restarting handler (typically sigaction() in
5086 modern systems) in an attempt to fix a rare and obscure crash bug.
5088 25. Narrowed the window for a race in the daemon that could cause it to ignore
5089 SIGCHLD signals. This is not a major problem, because they are used only to
5090 wake it up if nothing else does.
5092 26. A malformed maildirsize file could cause Exim to calculate negative values
5093 for the mailbox size or file count. Odd effects could occur as a result.
5094 The maildirsize information is now recalculated if the size or filecount
5097 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5098 support for a long time. Removed HAVE_SYS_VFS_H.
5100 28. Installed the latest version of exipick from John Jetmore.
5102 29. In an address list, if the pattern was not a regular expression, an empty
5103 subject address (from a bounce message) matched only if the pattern was an
5104 empty string. Non-empty patterns were not even tested. This was the wrong
5105 because it is perfectly reasonable to use an empty address as part of a
5106 database query. An empty address is now tested by patterns that are
5107 lookups. However, all the other forms of pattern expect the subject to
5108 contain a local part and a domain, and therefore, for them, an empty
5109 address still always fails if the pattern is not itself empty.
5111 30. Exim went into a mad DNS loop when attempting to do a callout where the
5112 host was specified on an smtp transport, and looking it up yielded more
5113 than one IP address.
5115 31. Re-factored the code for checking spool and log partition space into a
5116 function that finds that data and another that does the check. The former
5117 is then used to implement four new variables: $spool_space, $log_space,
5118 $spool_inodes, and $log_inodes.
5120 32. The RFC2047 encoding function was originally intended for short strings
5121 such as real names; it was not keeping to the 75-character limit for
5122 encoded words that the RFC imposes. It now respects the limit, and
5123 generates multiple encoded words if necessary. To be on the safe side, I
5124 have increased the buffer size for the ${rfc2047: expansion operator from
5127 33. It is now permitted to omit both strings after an "if" condition; if the
5128 condition is true, the result is "true". As before, when the second string
5129 is omitted, a false condition yields an empty string. This makes it less
5130 cumbersome to write custom ACL and router conditions.
5132 34. Failure to deliver a bounce message always caused it to be frozen, even if
5133 there was an errors_to setting on the router. The errors_to setting is now
5136 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5137 canonical form (fully expanded) before being placed in
5138 $sender_host_address.
5140 36. The table in the code that translates DNS record types into text (T_A to
5141 "A" for instance) was missing entries for NS and CNAME. It is just possible
5142 that this could have caused confusion if both these types were looked up
5143 for the same domain, because the text type is used as part of Exim's
5144 per-process caching. But the chance of anyone hitting this buglet seems
5147 37. The dnsdb lookup has been extended in a number of ways.
5149 (1) There is a new type, "zns", which walks up the domain tree until it
5150 finds some nameserver records. It should be used with care.
5152 (2) There is a new type, "mxh", which is like "mx" except that it returns
5153 just the host names, not the priorities.
5155 (3) It is now possible to give a list of domains (or IP addresses) to be
5156 looked up. The behaviour when one of the lookups defers can be
5157 controlled by a keyword.
5159 (4) It is now possible to specify the separator character for use when
5160 multiple records are returned.
5162 38. The dnslists ACL condition has been extended: it is now possible to supply
5163 a list of IP addresses and/or domains to be looked up in a particular DNS
5166 39. Added log_selector=+queue_time_overall.
5168 40. When running the queue in the test harness, wait just a tad after forking a
5169 delivery process, to get repeatability of debugging output.
5171 41. Include certificate and key file names in error message when GnuTLS fails
5172 to set them up, because the GnuTLS error message doesn't include the name
5173 of the failing file when there is a problem reading it.
5175 42. Allow both -bf and -bF in the same test run.
5177 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5179 44. The "Exiscan patch" is now merged into the mainline Exim source.
5181 45. Sometimes the final signoff response after QUIT could fail to get
5182 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5183 < 0 before doing a fflush(). This bug looks as though it goes back to the
5184 introduction of TLS in release 3.20, but "sometimes" must have been rare
5185 because the tests only now provoked it.
5187 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5188 (this can affect the format of dates).
5190 47. exim_tidydb, when checking for the continued existence of a message for
5191 which it has found a message-specific retry record, was not finding
5192 messages that were in split spool directories. Consequently, it was
5193 deleting retry records that should have stayed in existence.
5195 48. Steve fixed some bugs in eximstats.
5197 49. The SPA authentication driver was not abandoning authentication and moving
5198 on to the next authenticator when an expansion was forced to fail,
5199 contradicting the general specification for all authenticators. Instead it
5200 was generating a temporary error. It now behaves as specified.
5202 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5203 (the order specifies the preference for clients). The order is now AES256,
5204 AES128, 3DES, ARCFOUR128.
5206 51. Small patch to Sieve code - explicitly set From: when generating an
5209 52. Exim crashed if a remote delivery caused a very long error message to be
5210 recorded - for instance if somebody sent an entire SpamAssassin report back
5211 as a large number of 550 error lines. This bug was coincidentally fixed by
5212 increasing the size of one of Exim's internal buffers (big_buffer) that
5213 happened as part of the Exiscan merge. However, to be on the safe side, I
5214 have made the code more robust (and fixed the comments that describe what
5217 53. Now that there can be additional text after "Completed" in log lines (if
5218 the queue_time_overall log selector is set), a one-byte patch to exigrep
5219 was needed to allow it to recognize "Completed" as not the last thing in
5222 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5223 patch that reportedly fixes this has been added. I am not expert enough to
5224 create a test for it. This is what the patch creator wrote:
5226 "I found a little strange behaviour of ldap code when working with
5227 Windows 2003 AD Domain, where users was placed in more than one
5228 Organization Units. When I tried to give exim partial DN, the exit code
5229 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5230 But simultaneously result of request was absolutely normal ldap result,
5231 so I produce this patch..."
5233 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5234 REFERENCE, so I have modified the code to exclude the patch when that macro
5237 55. Some experimental protocols are using DNS PTR records for new purposes. The
5238 keys for these records are domain names, not reversed IP addresses. The
5239 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5240 leaves it alone. Component reversal etc. now happens only for IP addresses.
5243 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5245 57. Double the size of the debug message buffer (to 2048) so that more of very
5246 long debug lines gets shown.
5248 58. The exicyclog utility now does better if the number of log files to keep
5249 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5251 59. Two changes related to the smtp_active_hostname option:
5253 (1) $smtp_active_hostname is now available as a variable.
5254 (2) The default for smtp_banner uses $smtp_active_hostname instead
5255 of $primary_hostname.
5257 60. The host_aton() function is supposed to be passed a string that is known
5258 to be a valid IP address. However, in the case of IPv6 addresses, it was
5259 not checking this. This is a hostage to fortune. Exim now panics and dies
5260 if the condition is not met. A case was found where this could be provoked
5261 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5262 components; fortuitously, this particular loophole had already been fixed
5263 by change 4.50/55 above.
5265 If there are any other similar loopholes, the new check in host_aton()
5266 itself should stop them being exploited. The report I received stated that
5267 data on the command line could provoke the exploit when Exim was running as
5268 exim, but did not say which command line option was involved. All I could
5269 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5270 running as the user.
5273 61. There was a buffer overflow vulnerability in the SPA authentication code
5274 (which came originally from the Samba project). I have added a test to the
5275 spa_base64_to_bits() function which I hope fixes it.
5278 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5279 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5281 63. The daemon start-up calls getloadavg() while still root for those OS that
5282 need the first call to be done as root, but it missed one case: when
5283 deliver_queue_load_max is set with deliver_drop_privilege. This is
5284 necessary for the benefit of the queue runner, because there is no re-exec
5285 when deliver_drop_privilege is set.
5287 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5288 This has been fixed.
5290 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5291 was in use, was not putting the data itself into the right store pool;
5292 consequently, it could be overwritten for a subsequent message in the same
5293 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5296 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5298 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5299 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5300 the function were treating the return as a boolean value, which happened to
5301 work because 0=false and not-0=true, but is not correct code.
5303 68. The host_aton() function was not handling scoped IPv6 addresses (those
5304 with, for example, "%eth0" on the end) correctly.
5306 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5307 negated items (that is, ~something) in unsigned ints. Some compilers
5308 apparently mutter when there is no cast.
5310 70. If an address verification called from an ACL failed, and did not produce a
5311 user-specific message (i.e. there was only a "system" message), nothing was
5312 put in $acl_verify_message. In this situation, it now puts the system
5315 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5316 session; change 4.31/43 added the unwanted input to the log line - except
5317 that it did not do this in the start of session case. It now does.
5319 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5320 This is wrong and can cause the other end to generate a synchronization
5321 error if it is another Exim or anything else that does the synchronization
5322 check. A QUIT command is no longer sent after a timeout.
5324 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5325 during host lookups.
5327 74. The defer_ok option of callout verification was not working if it was used
5328 when verifying addresses in header lines, that is, for this case:
5330 verify = header_sender/callout=defer_ok
5332 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5333 those file descriptors could be used for SMTP connections. If anything
5334 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5335 could be sent to the SMTP client, causing chaos. The daemon now opens
5336 stdin, stdout, and stderr to /dev/null when it puts itself into the
5339 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5340 log by default. The user can override this with suitable Perl magic.
5342 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5343 the log message when discard triggers, was not working for the DATA ACL or
5344 for the non-SMTP ACL.
5346 78. Error message wording change in sieve.c.
5348 79. If smtp_accept_max_per_host was set, the number of connections could be
5349 restricted to fewer than expected, because the daemon was trying to set up
5350 a new connection before checking whether the processes handling previous
5351 connections had finished. The check for completed processes is now done
5352 earlier. On busy systems, this bug wouldn't be noticed because something
5353 else would have woken the daemon, and it would have reaped the completed
5356 80. If a message was submitted locally by a user whose login name contained one
5357 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5358 It caused a spool format error. I have fixed the spool reading code. A
5359 related problem was that the "from" clause in the Received: line became
5360 illegal because of the space(s). It is now covered by ${quote_local_part.
5362 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5365 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5367 83. Patch from Sieve maintainer to fix unterminated string problem in
5368 "vacation" handling.
5370 84. Some minor changes to the Linux configuration files to help with other
5371 OS variants using glibc.
5373 85. One more patch for Sieve to update vacation handling to latest spec.
5376 ----------------------------------------------------
5377 See the note above about the 4.44 and 4.50 releases.
5378 ----------------------------------------------------
5384 1. Change 4.43/35 introduced a bug that caused file counts to be
5385 incorrectly computed when quota_filecount was set in an appendfile
5388 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5389 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5392 3. Give more explanation in the error message when the command for a transport
5393 filter fails to execute.
5395 4. There are several places where Exim runs a non-Exim command in a
5396 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5397 was being done only for the command run by the queryprogram router. It is
5398 now done for all such subprocesses. The other cases are: ${run, transport
5399 filters, and the commands run by the lmtp and pipe transports.
5401 5. Some older OS have a limit of 256 on the maximum number of file
5402 descriptors. Exim was using setrlimit() to set 1000 as a large value
5403 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5404 systems. I've change it so that if it can't get 1000, it tries for 256.
5406 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5407 was an oversight, and furthermore, ever since the addition of extra
5408 controls (e.g. 4.43/32), the checks on when to allow different forms of
5409 "control" were broken. There should now be diagnostics for all cases when a
5410 control that does not make sense is encountered.
5412 7. $recipients is now available in the predata ACL (oversight).
5414 8. Tidy the search cache before the fork to do a delivery from a message
5415 received from the command line. Otherwise the child will trigger a lookup
5416 failure and thereby defer the delivery if it tries to use (for example) a
5417 cached ldap connection that the parent has called unbind on.
5419 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5420 of $address_data from the recipient verification was clobbered by the
5421 sender verification.
5423 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5424 was its contents. (It was OK if the option was not defined at all.)
5426 11. A "Completed" log line is now written for messages that are removed from
5427 the spool by the -Mrm option.
5429 12. $host_address is now set to the target address during the checking of
5430 ignore_target_hosts.
5432 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5433 being passed; this would have caused $sender_host_name to have been used if
5434 matching the list had actually called for a host name (not very likely,
5435 since this list is usually IP addresses). A host name is now passed as
5438 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5439 code that specifies a non-restarting handler (typically sigaction() in
5440 modern systems) in an attempt to fix a rare and obscure crash bug.
5442 15. Narrowed the window for a race in the daemon that could cause it to ignore
5443 SIGCHLD signals. This is not a major problem, because they are used only to
5444 wake it up if nothing else does.
5446 16. A malformed maildirsize file could cause Exim to calculate negative values
5447 for the mailbox size or file count. Odd effects could occur as a result.
5448 The maildirsize information is now recalculated if the size or filecount
5451 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5452 support for a long time. Removed HAVE_SYS_VFS_H.
5454 18. Updated exipick to current release from John Jetmore.
5456 19. Allow an empty sender to be matched against a lookup in an address list.
5457 Previously the only cases considered were a regular expression, or an
5460 20. Exim went into a mad DNS lookup loop when doing a callout where the
5461 host was specified on the transport, if the DNS lookup yielded more than
5464 21. The RFC2047 encoding function was originally intended for short strings
5465 such as real names; it was not keeping to the 75-character limit for
5466 encoded words that the RFC imposes. It now respects the limit, and
5467 generates multiple encoded words if necessary. To be on the safe side, I
5468 have increased the buffer size for the ${rfc2047: expansion operator from
5471 22. Failure to deliver a bounce message always caused it to be frozen, even if
5472 there was an errors_to setting on the router. The errors_to setting is now
5475 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5476 canonical form (fully expanded) before being placed in
5477 $sender_host_address.
5479 24. Updated eximstats to version 1.33
5481 25. Include certificate and key file names in error message when GnuTLS fails
5482 to set them up, because the GnuTLS error message doesn't include the name
5483 of the failing file when there is a problem reading it.
5485 26. Expand error message when OpenSSL has problems setting up cert/key files.
5488 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5489 (this can affect the format of dates).
5491 28. exim_tidydb, when checking for the continued existence of a message for
5492 which it has found a message-specific retry record, was not finding
5493 messages that were in split spool directories. Consequently, it was
5494 deleting retry records that should have stayed in existence.
5496 29. eximstats updated to version 1.35
5497 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5498 1.35 - bugfix such that pie charts by volume are generated correctly
5500 30. The SPA authentication driver was not abandoning authentication and moving
5501 on to the next authenticator when an expansion was forced to fail,
5502 contradicting the general specification for all authenticators. Instead it
5503 was generating a temporary error. It now behaves as specified.
5505 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5506 (the order specifies the preference for clients). The order is now AES256,
5507 AES128, 3DES, ARCFOUR128.
5509 31. Small patch to Sieve code - explicitly set From: when generating an
5512 32. Exim crashed if a remote delivery caused a very long error message to be
5513 recorded - for instance if somebody sent an entire SpamAssassin report back
5514 as a large number of 550 error lines. This bug was coincidentally fixed by
5515 increasing the size of one of Exim's internal buffers (big_buffer) that
5516 happened as part of the Exiscan merge. However, to be on the safe side, I
5517 have made the code more robust (and fixed the comments that describe what
5520 33. Some experimental protocols are using DNS PTR records for new purposes. The
5521 keys for these records are domain names, not reversed IP addresses. The
5522 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5523 leaves it alone. Component reversal etc. now happens only for IP addresses.
5526 34. The host_aton() function is supposed to be passed a string that is known
5527 to be a valid IP address. However, in the case of IPv6 addresses, it was
5528 not checking this. This is a hostage to fortune. Exim now panics and dies
5529 if the condition is not met. A case was found where this could be provoked
5530 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5531 components; fortuitously, this particular loophole had already been fixed
5532 by change 4.50/55 or 4.44/33 above.
5534 If there are any other similar loopholes, the new check in host_aton()
5535 itself should stop them being exploited. The report I received stated that
5536 data on the command line could provoke the exploit when Exim was running as
5537 exim, but did not say which command line option was involved. All I could
5538 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5539 running as the user.
5542 35. There was a buffer overflow vulnerability in the SPA authentication code
5543 (which came originally from the Samba project). I have added a test to the
5544 spa_base64_to_bits() function which I hope fixes it.
5547 36. The daemon start-up calls getloadavg() while still root for those OS that
5548 need the first call to be done as root, but it missed one case: when
5549 deliver_queue_load_max is set with deliver_drop_privilege. This is
5550 necessary for the benefit of the queue runner, because there is no re-exec
5551 when deliver_drop_privilege is set.
5553 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5554 was in use, was not putting the data itself into the right store pool;
5555 consequently, it could be overwritten for a subsequent message in the same
5556 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5559 38. Sometimes the final signoff response after QUIT could fail to get
5560 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5561 < 0 before doing a fflush(). This bug looks as though it goes back to the
5562 introduction of TLS in release 3.20, but "sometimes" must have been rare
5563 because the tests only now provoked it.
5569 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5570 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5571 Now it returns an integer. A number of calls were still expecting a T/F
5572 return. Fortuitously, in all cases, the tests worked in OK situations,
5573 which is the norm. However, things would have gone wrong on any write
5574 failures on the smtp file descriptor. This function is used when sending
5575 messages over SMTP and also when doing verify callouts.
5577 2. When Exim is called to do synchronous delivery of a locally submitted
5578 message (the -odf or -odi options), it no longer closes stderr before doing
5581 3. Implemented the mua_wrapper option.
5583 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5585 5. Implemented the functions header_remove(), header_testname(),
5586 header_add_at_position(), and receive_remove_recipient(), and exported them
5589 6. If an ACL "warn" statement specified the addition of headers, Exim already
5590 inserted X-ACL-Warn: at the start if there was no header name. However, it
5591 was not making this test for the second and subsequent header lines if
5592 there were newlines in the string. This meant that an invalid header could
5593 be inserted if Exim was badly configured.
5595 7. Allow an ACL "warn" statement to add header lines at the start or after all
5596 the Received: headers, as well as at the end.
5598 8. Added the rcpt_4xx retry error code.
5600 9. Added postmaster_mailfrom=xxx to callout verification option.
5602 10. Added mailfrom=xxxx to the callout verification option, for verify=
5605 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5606 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5608 12. Inserted some casts to stop certain compilers warning when using pointer
5609 differences as field lengths or precisions in printf-type calls (mostly
5610 affecting debugging statements).
5612 13. Added optional readline() support for -be (dynamically loaded).
5614 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5615 same clock tick as a message's arrival, so that its received time was the
5616 same as the "first fail" time on the retry record, and that message
5617 remained on the queue past the ultimate address timeout, every queue runner
5618 would try a delivery (because it was past the ultimate address timeout) but
5619 after another failure, the ultimate address timeout, which should have then
5620 bounced the address, did not kick in. This was a "< instead of <=" error;
5621 in most cases the first failure would have been in the next clock tick
5622 after the received time, and all would be well.
5624 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5625 being recognized when the domain list was tested by the match_domain
5626 condition in an expansion string.
5628 16. Added the ${str2b64: operator.
5630 17. Exim was always calling setrlimit() to set a large limit for the number of
5631 processes, without checking whether the existing limit was already
5632 adequate. (It did check for the limit on file descriptors.) Furthermore,
5633 errors from getrlimit() and setrlimit() were being ignored. Now they are
5634 logged to the main and panic logs, but Exim does carry on, to try to do its
5635 job under whatever limits there are.
5637 18. Imported PCRE 5.0.
5639 19. Trivial typo in log message " temporarily refused connection" (the leading
5642 20. If the log selector return_path_on_delivery was set and an address was
5643 redirected to /dev/null, the delivery process crashed because it assumed
5644 that a return path would always be set for a "successful" delivery. In this
5645 case, the whole delivery is bypassed as an optimization, and therefore no
5648 21. Internal re-arrangement: the function for sending a challenge and reading
5649 a response while authentication was assuming a zero-terminated challenge
5650 string. It's now changed to take a pointer and a length, to allow for
5651 binary data in such strings.
5653 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5655 23. Exim was not respecting finduser_retries when seeking the login of the
5656 uid under which it was called; it was always trying 10 times. (The default
5657 setting of finduser_retries is zero.) Also, it was sleeping after the final
5658 failure, which is pointless.
5660 24. Implemented tls_on_connect_ports.
5662 25. Implemented acl_smtp_predata.
5664 26. If the domain in control=submission is set empty, Exim assumes that the
5665 authenticated id is a complete email address when it generates From: or
5666 Sender: header lines.
5668 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5669 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5670 chown and chgrp in /bin and hostname in /usr/bin.
5672 28. Exim was keeping the "process log" file open after each use, just as it
5673 does for the main log. This opens the possibility of it remaining open for
5674 long periods when the USR1 signal hits a daemon. Occasional processlog
5675 errors were reported, that could have been caused by this. Anyway, it seems
5676 much more sensible not to leave this file open at all, so that is what now
5679 29. The long-running daemon process does not normally write to the log once it
5680 has entered its main loop, and it closes the log before doing so. This is
5681 so that log files can straightforwardly be renamed and moved. However,
5682 there are a couple of unusual error situations where the daemon does write
5683 log entries, and I had neglected to close the log afterwards.
5685 30. The text of an SMTP error response that was received during a remote
5686 delivery was being truncated at 512 bytes. This is too short for some of
5687 the long messages that one sometimes sees. I've increased the limit to
5690 31. It is now possible to make retry rules that apply only when a message has a
5691 specific sender, in particular, an empty sender.
5693 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5694 it possible to be selective about when SMTP synchronization is enforced.
5696 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5698 32. Implemented hosts_connection_nolog.
5700 33. Added an ACL for QUIT.
5702 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5705 35. Added mailbox_size and mailbox_filecount to appendfile.
5707 36. Added control = no_multiline_responses to ACLs.
5709 37. There was a bug in the logic of the code that waits for the clock to tick
5710 in the case where the clock went backwards by a substantial amount such
5711 that the microsecond fraction of "now" was more than the microsecond
5712 fraction of "then" (but the whole seconds number was less).
5714 38. Added support for the libradius Radius client library this is found on
5715 FreeBSD (previously only the radiusclient library was supported).
5721 1. When certain lookups returned multiple values in the form name=value, the
5722 quoting of the values was not always being done properly. Specifically:
5723 (a) If the value started with a double quote, but contained no whitespace,
5725 (b) If the value contained whitespace other than a space character (i.e.
5726 tabs or newlines or carriage returns) it was not quoted.
5727 This fix has been applied to the mysql and pgsql lookups by writing a
5728 separate quoting function and calling it from the lookup code. The fix
5729 should probably also be applied to nisplus, ibase and oracle lookups, but
5730 since I cannot test any of those, I have not disturbed their existing code.
5732 2. A hit in the callout cache for a specific address caused a log line with no
5733 reason for rejecting RCPT. Now it says "Previous (cached) callout
5734 verification failure".
5736 3. There was an off-by-one bug in the queryprogram router. An over-long
5737 return line was truncated at 256 instead of 255 characters, thereby
5738 overflowing its buffer with the terminating zero. As well as fixing this, I
5739 have increased the buffer size to 1024 (and made a note to document this).
5741 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5742 when Exim is waiting for an SMTP response from a remote server, Exim
5743 restarts its select() call on the socket, thereby resetting its timeout.
5744 This is not a problem when such interrupts are rare. Somebody set up a cron
5745 job to run exiwhat every 2 minutes, which is less than the normal select()
5746 timeout (5 or 10 minutes). This meant that the select() timeout never
5747 kicked in because it was always reset. I have fixed this by comparing the
5748 time when an interrupt arrives with the time at the start of the first call
5749 to select(). If more time than the timeout has elapsed, the interrupt is
5750 treated as a timeout.
5752 5. Some internal re-factoring in preparation for the addition of Sieve
5753 extensions (by MH). In particular, the "personal" test is moved to a
5754 separate function, and given an option for scanning Cc: and Bcc: (which is
5755 not set for Exim filters).
5757 6. When Exim created an email address using the login of the caller as the
5758 local part (e.g. when creating a From: or Sender: header line), it was not
5759 quoting the local part when it contained special characters such as @.
5761 7. Installed new OpenBSD configuration files.
5763 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5764 try to make them clearer.
5766 9. Callout options, other than the timeout value, were being ignored when
5767 verifying sender addresses in header lines. For example, when using
5769 verify = header_sender/callout=no_cache
5771 the cache was (incorrectly) being used.
5773 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5774 only the Cygwin environment.
5776 11. When return_path_on_delivery was set as a log selector, if different remote
5777 addresses in the same message used different return paths and parallel
5778 remote delivery occurred, the wrong values would sometimes be logged.
5779 (Whenever a remote delivery process finished, the return path value from
5780 the most recently started remote delivery process was logged.)
5782 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5783 lines when AUTH and/or TLS are in use. This is the "received protocol"
5784 field. Exim used to use "asmtp" for authenticated SMTP, without any
5785 indication (in the protocol name) for TLS use. Now it follows the RFC and
5786 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5787 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5788 names appear in log lines as well as in Received: header lines.
5790 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5791 extensions, and comparison tests, and to fix some bugs.
5793 14. Changes to the "personal" filter test:
5795 (1) The test was buggy in that it was just doing the equivalent of
5796 "contains" tests on header lines. For example, if a user's address was
5797 anne@some.where, the "personal" test would incorrectly be true for
5799 To: susanne@some.where
5801 This test is now done by extracting each address from the header in turn,
5802 and checking the entire address. Other tests that are part of "personal"
5803 are now done using regular expressions (for example, to check local parts
5804 of addresses in From: header lines).
5806 (2) The list of non-personal local parts in From: addresses has been
5807 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5808 taken from the Sieve specification recommendations.
5810 (3) If the message contains any header line starting with "List-" it is
5811 treated as non-personal.
5813 (4) The test for "circular" in the Subject: header line has been removed
5814 because it now seems ill-conceived.
5816 15. Minor typos in src/EDITME comments corrected.
5818 16. Installed latest exipick from John Jetmore.
5820 17. If headers_add on a router specified a text string that was too long for
5821 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5822 of string_sprintf() is now avoided.
5824 18. $message_body_size was not set (it was always zero) when running the DATA
5825 ACL and the local_scan() function.
5827 19. For the "mail" command in an Exim filter, no default was being set for
5828 the once_repeat time, causing a random time value to be used if "once" was
5829 specified. (If the value happened to be <= 0, no repeat happened.) The
5830 default is now 0s, meaning "never repeat". The "vacation" command was OK
5831 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5832 (I found it when inspecting the code).
5834 20. There is now an overall timeout for performing a callout verification. It
5835 defaults to 4 times the callout timeout, which applies to individual SMTP
5836 commands during the callout. The overall timeout applies when there is more
5837 than one host that can be tried. The timeout is checked before trying the
5838 next host. This prevents very long delays if there are a large number of
5839 hosts and all are timing out (e.g. when the network connections are timing
5840 out). The value of the overall timeout can be changed by specifying an
5841 additional sub-option for "callout", called "maxwait". For example:
5843 verify = sender/callout=5s,maxwait=20s
5845 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5846 to the end before writing, but this should make it even safer).
5848 22. Exim was forgetting that it had advertised PIPELINING for the second and
5849 subsequent messages on an SMTP connection. It was also not resetting its
5850 memory on STARTTLS and an internal HELO.
5852 23. When Exim logs an SMTP synchronization error within a session, it now
5853 records whether PIPELINING has been advertised or not.
5855 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5856 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5857 rather than long int.
5859 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5861 26. Added the never_mail option to autoreply.
5867 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5868 crash if the getsockname() call failed; this can happen if a connection is
5869 closed very soon after it is established. The problem was simply in the
5870 order in which certain operations were done, causing Exim to try to write
5871 to the SMTP stream before it had set up the file descriptor. The bug has
5872 been fixed by making things happen in the correct order.
5878 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5879 before the connection was closed, thus losing the rejection response.
5881 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5882 some early Solaris releases, but causes trouble in current releases where
5883 socklen_t is defined.
5885 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5888 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5891 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5892 that releasing the top of it at the end releases what was used for sub-
5893 expansions (unless the block got too big). However, discard this block if
5894 the first thing is a variable or header, so that we can use its block when
5895 it is dynamic (useful for very large $message_headers, for example).
5897 6. Lookups now cache *every* query, not just the most recent. A new, separate
5898 store pool is used for this. It can be recovered when all lookup caches are
5899 flushed. Lookups now release memory at the end of their result strings.
5900 This has involved some general refactoring of the lookup sources.
5902 7. Some code has been added to the store_xxx() functions to reduce the amount
5903 of flapping under certain conditions.
5905 8. log_incoming_interface used to affect only the <= reception log lines. Now
5906 it causes the local interface and port to be added to several more SMTP log
5907 lines, for example "SMTP connection from", and rejection lines.
5909 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5911 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5913 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5914 could be overwritten at the end of the current message (or the start of a
5915 new message if it was set in a HELO ACL). The value is now preserved for
5916 the duration of the SMTP connection.
5918 12. If a transport had a headers_rewrite setting, and a matching header line
5919 contained an unqualified address, that address was qualified, even if it
5920 did not match any rewriting rules. The underlying bug was that the values
5921 of the flags that permit the existence of unqualified sender and recipient
5922 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5923 non-local messages, and by -bnq for local messages) were not being
5924 preserved with the message after it was received.
5926 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5927 "next input=" as part of the text comprising the host identity instead of
5928 the correct text. The code was using the same buffer for two different
5929 strings. However, depending on which order the printing function evaluated
5930 its arguments, the bug did not always show up. Under Linux, for example, my
5931 test suite worked just fine.
5933 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5934 doesn't work with some older versions of Perl. It has been changed to "my",
5935 which in any case is probably the better facility to use.
5937 15. A really picky compiler found some instances of statements for creating
5938 error messages that either had too many or two few arguments for the format
5941 16. The size of the buffer for calls to the DNS resolver has been increased
5942 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5943 for addresses that have a lot of PTR records. This alleviates a problem; it
5944 does not fully solve it.
5946 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5947 buffer now truncates the list and logs the incident, which is the same
5948 action as happens when Exim is looking up a host name and its aliases.
5949 Previously in this situation something unpredictable would happen;
5950 sometimes it was "internal error: store_reset failed".
5952 18. If a server dropped the connection unexpectedly when an Exim client was
5953 using GnuTLS and trying to read a response, the client delivery process
5954 crashed while trying to generate an error log message.
5956 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5957 string, for example:
5959 warn message = H1: something\nH2: something
5961 the text was added as a single header line from Exim's point of view
5962 though it ended up OK in the delivered message. However, searching for the
5963 second and subsequent header lines using $h_h2: did not work. This has been
5964 fixed. Similarly, if a system filter added multiple headers in this way,
5965 the routers could not see them.
5967 20. Expanded the error message when iplsearch is called with an invalid key to
5968 suggest using net-iplsearch in a host list.
5970 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5971 ACLs are no longer actually imposed (and a message to that effect is
5974 22. If a "gecos" field in a passwd entry contained escaped characters, in
5975 particular, if it contained a \" sequence, Exim got it wrong when building
5976 a From: or a Sender: header from that name. A second bug also caused
5977 incorrect handling when an unquoted " was present following a character
5978 that needed quoting.
5980 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5981 was not being matched caselessly.
5983 24. Arranged for all hyphens in the exim.8 source to be escaped with
5986 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5987 properly. Recipient callout cache records were still being keyed to include
5988 the sender, even when use_sender was set false. This led to far more
5989 callouts that were necessary. The sender is no longer included in the key
5990 when use_sender is false.
5992 26. Added "control = submission" modifier to ACLs.
5994 27. Added the ${base62d: operator to decode base 62 numbers.
5996 28. dnsdb lookups can now access SRV records.
5998 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5999 the configuration file.
6001 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6002 (-v) mode. This makes the output for a verbose queue run more intelligible.
6004 31. Added a use_postmaster feature to recipient callouts.
6006 32. Added the $body_zerocount variable, containing the number of binary zero
6007 bytes in the message body.
6009 33. The time of last modification of the "new" subdirectory is now used as the
6010 "mailbox time last read" when there is a quota error for a maildir
6013 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6015 35. Added +ignore_unknown as a special item in host lists.
6017 36. Code for decoding IPv6 addresses in host lists is now included, even if
6018 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6019 address was recognized as an IP address, but was then not correctly decoded
6020 into binary, causing unexpected and incorrect effects when compared with
6027 1. Very minor rewording of debugging text in manualroute to say "list of
6028 hosts" instead of "hostlist".
6030 2. If verify=header_syntax was set, and a header line with an unqualified
6031 address (no domain) and a large number of spaces between the end of the
6032 name and the colon was received, the reception process suffered a buffer
6033 overflow, and (when I tested it) crashed. This was caused by some obsolete
6034 code that should have been removed. The fix is to remove it!
6036 3. When running in the test harness, delay a bit after writing a bounce
6037 message to get a bit more predictability in the log output.
6039 4. Added a call to search_tidyup() just before forking a reception process. In
6040 theory, someone could use a lookup in the expansion of smtp_accept_max_
6041 per_host which, without the tidyup, could leave open a database connection.
6043 5. Added the variables $recipient_data and $sender_data which get set from a
6044 lookup success in an ACL "recipients" or "senders" condition, or a router
6045 "senders" option, similar to $domain_data and $local_part_data.
6047 6. Moved the writing of debug_print from before to after the "senders" test
6050 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6051 problems for message scanning, either using a data ACL, or using
6052 local_scan() because the Received: header was not generated till after they
6053 were called (in order to set the time as the time of reception completion).
6054 I have revised the way this works. The header is now generated after the
6055 body is received, but before the ACL or local_scan() are called. After they
6056 are run, the timestamp in the header is updated.
6062 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6063 before starting a queue runner without re-exec. This happened only when
6064 deliver_drop_privilege was set or when the Exim user was set to root. The
6065 effect of the bug was that timeouts during subsequent deliveries caused
6066 crashes instead of being properly handled. The handler is now left at its
6067 default (and expected) setting.
6069 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6070 message, again when deliver_drop_privilege is set or Exim is run as root.
6071 The bug described in (1) was not present in this case, but the tidying up
6072 of the other signals was missing. I have made the two cases consistent.
6074 3. The ignore_target_hosts setting on a manualroute router was being ignored
6075 for hosts that were looked up using the /MX notation.
6077 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6080 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6081 operated on the sender address. After changing the $sender_address to <>
6082 for the sender address verify, Exim was re-instated it as the original
6083 (before rewriting) address, but remembering that it had rewritten it, so it
6084 wasn't rewriting it again. This bug also had the effect of breaking the
6085 sender address verification caching when the sender address was rewritten.
6087 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6088 This has been changed so that if the ip literal address matches
6089 ignore_target_hosts, the router declines.
6091 7. Added expansion conditions match_domain, match_address, and match_local_
6092 part (NOT match_host).
6094 8. The placeholder for the Received: header didn't have a length field set.
6096 9. Added code to Exim itself and to exim_lock to test for a specific race
6097 condition that could lead to file corruption when using MBX delivery. The
6098 issue is with the lockfile that is created in /tmp. If this file is removed
6099 after a process has opened it but before that process has acquired a lock,
6100 there is the potential for a second process to recreate the file and also
6101 acquire a lock. This could lead to two Exim processes writing to the file
6102 at the same time. The added code performs the same test as UW imapd; it
6103 checks after acquiring the lock that its file descriptor still refers to
6104 the same named file.
6106 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6107 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6110 11. Added the smtp_active_hostname option. If used, this will typically be made
6111 to depend on the incoming interface address. Because $interface_address is
6112 not set up until the daemon has forked a reception process, error responses
6113 that can happen earlier (such as "too many connections") no longer contain
6116 12. If an expansion in a condition on a "warn" statement fails because a lookup
6117 defers, the "warn" statement is abandoned, and the next ACL statement is
6118 processed. Previously this caused the whole ACL to be aborted.
6120 13. Added the iplsearch lookup type.
6122 14. Added ident_timeout as a log selector.
6124 15. Added tls_certificate_verified as a log selector.
6126 16. Added a global option tls_require_ciphers (compare the smtp transport
6127 option of the same name). This controls incoming TLS connections.
6129 17. I finally figured out how to make tls_require_ciphers do a similar thing
6130 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6131 before starting the TLS session.
6133 18. Tabs are now shown as \t in -bP output.
6135 19. If the log selector return_path_on_delivery was set, Exim crashed when
6136 bouncing a message because it had too many Received: header lines.
6138 20. If two routers both had headers_remove settings, and the first one included
6139 a superfluous trailing colon, the final name in the first list and the
6140 first name in the second list were incorrectly joined into one item (with a
6141 colon in the middle).
6147 1. Added -C and -D options to the exinext utility, mainly to make it easier
6148 to include in the automated testing, but these could be helpful when
6149 multiple configurations are in use.
6151 2. The exinext utility was not formatting the output nicely when there was
6152 an alternate port involved in the retry record key, nor when there was a
6153 message id as well (for retries that were specific to a specific message
6154 and a specific host). It was also confused by IPv6 addresses, because of
6155 the additional colons they contain. I have fixed the IPv4 problem, and
6156 patched it up to do a reasonable job for IPv6.
6158 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6159 delivery, the log line now contains "pipelined" if PIPELINING was used.
6161 4. An SMTP transport process used to panic and die if the bind() call to set
6162 an explicit outgoing interface failed. This has been changed; it is now
6163 treated in the same way as a connect() failure.
6165 5. A reference to $sender_host_name in the part of a conditional expansion
6166 that was being skipped was still causing a DNS lookup. This no longer
6169 6. The def: expansion condition was not recognizing references to header lines
6170 that used bh_ and bheader_.
6172 7. Added the _cache feature to named lists.
6174 8. The code for checking quota_filecount in the appendfile transport was
6175 allowing one more file than it should have been.
6177 9. For compatibility with Sendmail, the command line option
6185 and sets the incoming protocol and host name (for trusted callers). The
6186 host name and its colon can be omitted when only the protocol is to be set.
6187 Note the Exim already has two private options, -pd and -ps, that refer to
6188 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6189 "s", but I don't think that's a major issue.
6191 10. A number of refactoring changes to the code, none of which should affect
6194 (a) The number of logging options was getting close to filling up the
6195 32-bit word that was used as a bit map. I have split them into two classes:
6196 those that are passed in the argument to log_write(), and those that are
6197 only ever tested independently outside of that function. These are now in
6198 separate 32-bit words, so there is plenty of room for expansion again.
6199 There is no change in the user interface or the logging behaviour.
6201 (b) When building, for example, log lines, the code previously used a
6202 macro that called string_cat() twice, in order to add two strings. This is
6203 not really sufficiently general. Furthermore, there was one instance where
6204 it was actually wrong because one of the argument was used twice, and in
6205 one call a function was used. (As it happened, calling the function twice
6206 did not affect the overall behaviour.) The macro has been replaced by a
6207 function that can join an arbitrary number of extra strings onto a growing
6210 (c) The code for expansion conditions now uses a table and a binary chop
6211 instead of a serial search (which was left over from when there were very
6212 few conditions). Also, it now recognizes conditions like "pam" even when
6213 the relevant support is not compiled in: a suitably worded error message is
6214 given if an attempt is made to use such a condition.
6216 11. Added ${time_interval:xxxxx}.
6218 12. A bug was causing one of the ddress fields not to be passed back correctly
6219 from remote delivery subprocesses. The field in question was not being
6220 subsequently used, so this caused to problems in practice.
6222 13. Added new log selectors queue_time and deliver_time.
6224 14. Might have fixed a bug in maildirsizefile handling that threw up
6225 "unexpected character" debug warnings, and recalculated the data
6226 unnecessarily. In any case, I expanded the warning message to give more
6229 15. Added the message "Restricted characters in address" to the statements in
6230 the default ACL that block characters like @ and % in local parts.
6232 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6233 Three changes have been made:
6235 (a) There was a serious bug; a negative response to MAIL caused the whole
6236 recipient domain to be cached as invalid, thereby blocking all messages
6237 to all local parts at the same domain, from all senders. This bug has
6238 been fixed. The domain is no longer cached after a negative response to
6239 MAIL if the sender used is not empty.
6241 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6244 (c) A new callout option, "use_sender" has been added for people who want
6245 the modified behaviour.
6251 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6254 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6255 indeed breaks things for older releases.
6257 3. Added additional logging to the case where there is a problem reading data
6258 from a filter that is running in a subprocess using a pipe, in order to
6259 try to track down a specific problem.
6261 4. Testing facility fudge: when running in the test harness and attempting
6262 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6263 getting "No route to host". Convert this to a timeout.
6265 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6268 6. Some OS don't have socklen_t but use size_t instead. This affects the
6269 fifth argument of getsockopt() amongst other things. This is now
6270 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6271 can be set for individual OS. I have set it for SunOS5, OSF1, and
6272 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6273 some earlier ones do not.
6275 7. Change 4.30/15 was not doing the test caselessly.
6277 8. The standard form for an IPv6 address literal was being rejected by address
6278 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6279 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6280 this, as well as the form without the "IPv6" on the front (but only when
6281 address literals are enabled, of course).
6283 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6285 10. Exim crashed if a message with an empty sender address specified by -f
6286 encountered a router with an errors_to setting. This could be provoked only
6287 by a command such as
6291 where an empty string was supplied; "<>" did not hit this bug.
6293 11. Installed PCRE release 4.5.
6295 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6296 remained set. It is now erased.
6298 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6299 times from message ids (which are base 36 rather than the normal 62).
6301 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6302 were being counted as actual protocol errors, and logged if the log
6303 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6304 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6305 and DATA following a set of rejected RCPTs do not count as protocol errors.
6306 In other words, Exim assumes they were pipelined, though this may not
6307 actually be the case. Of course, in all cases the client gets an
6308 appropriate error code.
6310 15. If a lookup fails in an ACL condition, a message about the failure may
6311 be available; it is used if testing the ACL cannot continue, because most
6312 such messages specify what the cause of the deferral is. However, some
6313 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6314 that caused an old message to be retained and used if a later statement
6315 caused a defer, replacing the real cause of the deferral.
6317 16. If an IP address had so many PTR records that the DNS lookup buffer
6318 was not large enough to hold them, Exim could crash while trying to process
6319 the truncated data. It now detects and logs this case.
6321 17. Further to 4.21/58, another change has been made: if (and only if) the
6322 first line of a message (the first header line) ends with CRLF, a bare LF
6323 in a subsequent header line has a space inserted after it, so as not to
6324 terminate the header.
6326 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6327 unnecessarily, used atoi() instead of strtol(), and didn't check the
6328 termination when getting file sizes from file names by regex.
6330 19. Completely re-implemented the support for maildirsize files, in the light
6331 of a number of problems with the previous contributed implementation
6332 (4.30/29). In particular:
6334 . If the quota is zero, the maildirsize file is maintained, but no quota is
6337 . If the maildir directory does not exist, it is created before any attempt
6338 to write a maildirsize file.
6340 . The quota value in the file is just a cache; if the quota is changed in
6341 the transport, the new value overrides.
6343 . A regular expression is available for excluding directories from the
6346 20. The autoreply transport checks the characters in options that define the
6347 message's headers; it allows continued headers, but it was checking with
6348 isspace() after an embedded newline instead of explicitly looking for a
6351 21. If all the "regular" hosts to which an address was routed had passed their
6352 expiry times, and had not reached their retry times, the address was
6353 bounced, even if fallback hosts were defined. Now Exim should go on to try
6356 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6357 equivalent code in the SMTP transport. Some hosts send humungous responses
6358 to HELO/EHLO, more than 1024 it seems.
6360 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6361 gives compiler warnings in some environments. I've now done it "properly",
6364 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6365 (because of problems with the built-in one) was declared to return uschar *
6366 instead of char *, causing compiler failure.
6368 25. Fixed a file descriptor leak when processing alias/forward files.
6370 26. Fixed a minor format string issue in dbfn.c.
6372 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6374 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6375 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6378 29. When a sender address is verified, it is cached, to save repeating the test
6379 when there is more than one recipient in a message. However, when the
6380 verification involves a callout, it is possible for different callout
6381 options to be set for different recipients. It is too complicated to keep
6382 track of this in the cache, so now Exim always runs a verification when a
6383 callout is required, relying on the callout cache for the optimization.
6384 The overhead is duplication of the address routing, but this should not be
6387 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6388 to be verified with callout=postmaster, and the main callout worked but the
6389 postmaster check failed, the verification correctly failed. However, if a
6390 subsequent RCPT command asked for sender verification *without* the
6391 postmaster check, incorrect caching caused this verification also to fail,
6394 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6395 it was not caching the DNS options (qualify_single, search_parents) that
6396 were used when the lookup failed. A subsequent lookup with different
6397 options therefore always gave the same answer, though there were cases
6398 where it should not have. (Example: a "domains = !$mx_any" option on a
6399 dnslookup router: the "domains" option is always processed without any
6400 widening, but the router might have qualify_single set.) Now Exim uses the
6401 cached value only when the same options are set.
6403 32. Added John Jetmore's "exipick" utility to the distribution.
6405 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6406 than a timeout (e.g. a certificate is required, and is not provided), an
6407 Exim server now closes the connection immediately. Previously it waited for
6408 the client to close - but if the client is SSL, it seems that they each
6409 wait for each other, leading to a delay before one of them times out.
6411 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6412 maintained 0.8.x compatibility because I don't think many are using it, and
6413 it is clearly obsolete.
6415 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6418 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6419 client certificate was expired. A simple patch fixes this, though I don't
6420 understand the full logic of why the verify callback is called multiple
6423 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6424 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6425 which causes problems with some clients (such as the Certicom SSL Plus
6426 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6427 disables the coutermeasure allowing Eudora to connect."
6429 38. Exim was not checking that a write() to a log file succeeded. This could
6430 lead to Bad Things if a log got too big, in particular if it hit a file
6431 size limit. Exim now panics and dies if it cannot write to a log file, just
6432 as it does if it cannot open a log file.
6434 39. Modified OS/Makefile-Linux so that it now contains
6436 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6438 The two -D definitions ensure that Exim is compiled with large file
6439 support, which makes it possible to handle log files that are bigger than
6442 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6443 instance) a domain was checked against a named list that involved a lookup,
6444 causing $domain_data to be set, then another domain was checked against the
6445 same list, then the first domain was re-checked, the value of $domain_data
6446 after the final check could be wrong. In particular, if the second check
6447 failed, it could be set empty. This bug probably also applied to
6450 41. The strip_trailing_dot option was not being applied to the address given
6451 with the -f command-line option.
6453 42. The code for reading a message's header from the spool was incrementing
6454 $received_count, but never initializing it. This meant that the value was
6455 incorrect (doubled) while delivering a message in the same process in which
6456 it was received. In the most common configuration of Exim, this never
6457 happens - a fresh exec is done - but it can happen when
6458 deliver_drop_privilege is set.
6460 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6461 it now includes up to 150 characters of the unexpected data in the log
6464 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6465 and building data strings. The size of both of these buffers was 10 000
6466 bytes - far larger than anybody would *ever* want, thought I. Needless to
6467 say, somebody hit the limit. I have increased the maximum line length to
6468 20 000 and the maximum data length of concatenated lines to 100 000. I have
6469 also fixed two bugs, because there was no checking on these buffers. Tsk,
6470 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6471 buffer is too small.
6473 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6474 lsearch lookups. Now it does.
6476 46. When parsing a route_list item in a manualroute router, a fixed-length
6477 buffer was used for the list of hosts. I made this 1024 bytes long,
6478 thinking that nobody would ever have a list of hosts that long. Wrong.
6479 Somebody had a whole pile of complicated expansion conditions, and the
6480 string was silently truncated, leading to an expansion error. It turns out
6481 that it is easier to change to an unlimited length (owing to other changes
6482 that have happened since this code was originally written) than to build
6483 structure for giving a limitation error. The length of the item that
6484 expands into the list of hosts is now unlimited.
6486 47. The lsearch lookup could not handle data where the length of text line was
6487 more than 4095 characters. Such lines were truncated, leading to shortened
6488 data being returned. It should now handle lines of any length.
6490 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6491 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6494 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6495 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6496 no longer happens in comment lines. A list of replacements is now placed
6497 at the head of all of the source files, except those whose only change is
6498 to replace PERL_COMMAND in the very first #! line.
6500 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6501 messages on the queue, with a bottom-up merge sort, using code contributed
6502 by Michael Haardt. This should make operations like -bp somewhat faster on
6503 large queues. It won't affect queue runners, except when queue_run_in_order
6506 51. Installed eximstats 1.31 in the distribution.
6508 52. Added support for SRV lookups to the dnslookup router.
6510 53. If an ACL referred to $message_body or $message_body_end, the value was not
6511 reset for any messages that followed in the same SMTP session.
6513 54. The store-handling optimization for building very long strings was not
6514 differentiating between the different store pools. I don't think this
6515 actually made any difference in practice, but I've tidied it.
6517 55. While running the routers to verify a sender address, $sender_address
6518 was still set to the sender address. This is wrong, because when routing to
6519 send a bounce to the sender, it would be empty. Therefore, I have changed
6520 it so that, while verifying a sender address, $sender_address is set to <>.
6521 (There is no change to what happens when verifying a recipient address.)
6523 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6524 target A or AAAA records (if not already returned) without resetting the
6525 qualify_single or search_parents options of the DNS resolver. These are
6526 inappropriate in this case because the targets of MX and SRV records must
6527 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6528 target that, when qualified, matched something in the local domain. These
6529 two options are now turned off when doing these lookups.
6531 57. It seems that at least some releases of Reiserfs (which does not have the
6532 concept of a fixed number of inodes) returns zero and not -1 for the
6533 number of available inodes. This interacted badly with check_spool_inodes,
6534 which assumed that -1 was the "no such thing" setting. What I have done is
6535 to check that the total number of inodes is greater than zero before doing
6536 the test of how many are available.
6538 58. When a "warn" ACL statement has a log_message modifier, the message is
6539 remembered, and not repeated. This is to avoid a lot of repetition when a
6540 message has many recipients that cause the same warning to be written.
6541 However, Exim was preserving the list of already written lines for an
6542 entire SMTP session, which doesn't seem right. The memory is now reset if a
6543 new message is started.
6545 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6546 debugging output unless log_rewrite was also set.
6548 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6549 of (int)(handle) when we know that handle contains (void *)(-1).
6551 61. The Exim daemon panic-logs an error return when it closes the incoming
6552 connection. However "connection reset by peer" seems to be common, and
6553 isn't really an error worthy of noting specially, so that particular error
6556 62. When Exim is trying to find all the local interfaces, it used to panic and
6557 die if the ioctl to get the interface flags failed. However, it seems that
6558 on at least one OS (Solaris 9) it is possible to have an interface that is
6559 included in the list of interfaces, but for which you get a failure error
6560 for this call. This happens when the interface is not "plumbed" into a
6561 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6562 failure of the "get flags" call assumes that the interface is down.
6564 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6565 makes life easier for people who are doing arithmetic on fields extracted
6566 from dates, where you often get leading zeros that should not be
6567 interpreted as octal.
6569 64. Added qualify_domain to the redirect router, to override the global
6572 65. If a pathologically long header line contained very many addresses (the
6573 report of this problem mentioned 10 000) and each of them was rewritten,
6574 Exim could use up a very large amount of memory. (It kept on making new
6575 copies of the header line as it rewrote, and never released the old ones.)
6576 At the expense of a bit more processing, the header rewriting function has
6577 been changed so that it no longer eats memory in this way.
6579 66. The generation of the Received: header has been moved from the time that a
6580 message starts to be received, to the time that it finishes. The timestamp
6581 in the Received: header should now be very close to that of the <= log
6582 line. There are two side-effects of this change:
6584 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6585 logged header lines no longer include the local Received: line, because
6586 it has not yet been created. The same applies to a copy of the message
6587 that is returned to a non-SMTP sender when a message is rejected.
6589 (b) When a filter file is tested using -bf, no additional Received: header
6590 is added to the test message. After some thought, I decided that this
6593 This change does not affect the value of $received_for. It is still set
6594 after address rewriting, but before local_scan() is called.
6596 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6598 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6599 gave an unhelpful panic error message, and a defer error. I have managed to
6600 change this behaviour so that it now rejects any supplied certificate,
6601 which seems right, as the list of acceptable certificates is empty.
6603 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6604 gave an unhelpful defer error. I have not managed to make this reject any
6605 supplied certificates, but the error message it gives is "no certificate
6606 supplied", which is not helpful.
6608 70. exigrep's output now also includes lines that are not associated with any
6609 message, but which match the given pattern. Implemented by a patch from
6610 Martin Sluka, which also tidied up the Perl a bit.
6612 71. Recipient callout verification, like sender verification, was using <> in
6613 the MAIL FROM command. This isn't really the right thing, since the actual
6614 sender may affect whether the remote host accepts the recipient or not. I
6615 have changed it to use the actual sender in the callout; this means that
6616 the cache record is now keyed on a recipient/sender pair, not just the
6617 recipient address. There doesn't seem to be a real danger of callout loops,
6618 since a callout by the remote host to check the sender would use <>.
6619 [SEE ABOVE: changed after hitting problems.]
6621 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6622 temporary errors. However, in the case of such a code being given after
6623 the end of a data transmission (i.e. after ".") Exim was failing to write
6624 a retry record for the message. (Yes, there was some broken host that was
6625 actually sending 8xx at this point.)
6627 73. An unknown lookup type in a host list could cause Exim to panic-die when
6628 the list was checked. (An example that provoked this was putting <; in the
6629 middle of a list instead of at the start.) If this happened during a DATA
6630 ACL check, a -D file could be left lying around. This kind of configuration
6631 error no longer causes Exim to die; instead it causes a defer error. The
6632 incident is still logged to the main and panic logs.
6634 74. Buglet left over from Exim 3 conversion. The message "too many messages
6635 in one connection" was written to the rejectlog but not the mainlog, except
6636 when address rewriting (yes!) was being logged.
6638 75. Added write_rejectlog option.
6640 76. When a system filter was run not as root (that is, when system_filter_user
6641 was set), the values of the $n variables were not being returned to the
6642 main process; thus, they were not subsequently available in the $sn
6645 77. Added +return_path_on_delivery log selector.
6647 78. A connection timeout was being treated differently from recipients deferred
6648 when testing hosts_max_try with a message that was older than the host's
6649 retry timeout. (The host should not be counted, thus allowing all hosts to
6650 be tried at least once before bouncing.) This may have been the cause of an
6651 occasionally reported bug whereby a message would remain on the queue
6652 longer than the retry timeout, but would be bounced if a delivery was
6653 forced. I say "may" because I never totally pinned down the problem;
6654 setting up timeout/retry tests is difficult. See also the next item.
6656 79. The ultimate address timeout was not being applied to errors that involved
6657 a combination of host plus message (for example, a timeout on a MAIL
6658 command). When an address resolved to a number of possible hosts, and they
6659 were not all tried for each delivery (e.g. because of hosts_max_try), a
6660 message could remain on the queue longer than the retry timeout.
6662 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6665 81. Fixed an obscure SMTP outgoing bug which required at least the following
6666 conditions: (a) there was another message waiting for the same server;
6667 (b) the server returned 5xx to all RCPT commands in the first message so
6668 that the message was not completed; (c) the server dropped the connection
6669 or gave a negative response to the RSET that Exim sends to abort the
6670 transaction. The observed case was a dropped connection after DATA that had
6671 been sent in pipelining mode. That is, the server had advertised PIPELINING
6672 but was not implementing it correctly. The effect of the bug was incorrect
6673 behaviour, such as trying another host, and this could lead to a crash.
6679 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6680 and daemon.c were passed as pointers to ints; they should have been
6681 pointers to socklen_t variables (which are typically unsigned ints).
6683 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6686 3. Fixed a really odd bug that affected only the testing scheme; patching a
6687 certain fixed string in the binary changed the value of another string that
6688 happened to be identical to the end of the original first string.
6690 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6691 name", it returns that address as the IP address. On some operating
6692 systems (e.g. Solaris), it also passes back the IP address string as the
6693 "host name". However, on others (e.g. Linux), it passes back an empty
6694 string. Exim wasn't checking for this, and was changing the host name to an
6695 empty string, assuming it had been canonicalized.
6697 5. Although rare, it is permitted to have more than one PTR record for a given
6698 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6699 all the names associated with an address, because they do in Solaris.
6700 However, it seems that they do not in Linux for data that comes from the
6701 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6702 I found this out when I moved to a new Linux workstation and tried to run
6703 the Exim test suite.
6705 To get round this problem I have changed the code so that it now does its
6706 own call to the DNS to look up PTR records when searching for a host name.
6707 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6708 addresses that are only in /etc/hosts are still found.
6710 This behaviour is, however, controlled by an option called host_lookup_
6711 order, which defaults to "bydns:byaddr". If people want to use the other
6712 order, or indeed, just use one or the other means of lookup, they can
6713 specify it in this variable.
6715 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6716 some operating systems, this comes back from gethostbyaddr() as an empty
6717 string, and this is what Exim used to test for. However, it seems that in
6718 other systems, "." is yielded. Exim now tests for this case too.
6720 7. The values of check_spool_space and check_log_space are now held internally
6721 as a number of kilobytes instead of an absolute number of bytes. If a
6722 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6723 kilobyte. This means that much larger values can be stored.
6725 8. Exim monitor: an attempt to get the action menu when not actually pointing
6726 at a message produces an empty menu entitled "No message selected". This
6727 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6728 no entries in it ("Shell widget menu has zero width and/or height"). So I
6729 have added a single, blank menu entry in this case.
6731 9. Added ${quote_local_part.
6733 10. MIME decoding is now applied to the contents of Subject: header lines when
6736 11. Now that a reference to $sender_host_address automatically causes a reverse
6737 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6738 host lookup before query-style lookups in lists that might use this
6739 variable. This has therefore been abolished, and the "net-" prefix is no
6740 longer necessary for query-style lookups.
6742 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6743 have been a typo for LFLAGS, so it has been changed.
6745 13. The install script calls Exim with "-C /dev/null" in order to find the
6746 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6747 to be output. However, since Exim outputs its version number before the
6748 error, it didn't break the script. It just looked ugly. I fixed this by
6749 always allowing "-C /dev/null" if the caller is root.
6751 14. Ignore overlarge ACL variable number when reading spool file - insurance
6752 against a later release with more variables having written the file.
6754 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6755 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6756 this, as well as the form without the "IPv6" on the front.
6758 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6759 OS/Makefile-Darwin file.
6761 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6762 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6764 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6765 variable. However, some OS use ints for inodes. I've added cast to long int
6766 to get rid of the compiler warning.
6768 19. I had forgotten to lock out "/../" in configuration file names when
6769 ALT_CONFIG_PREFIX was set.
6771 20. Routers used for verification do not need to specify transports. However,
6772 if such a router generated a host list, and callout was configured, Exim
6773 crashed, because it could not find a port number from the (non-existent)
6774 transport. It now assumes port 25 in this circumstance.
6776 21. Added the -t option to exigrep.
6778 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6779 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6780 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6781 them is set, LOOKUP_LSEARCH is forced.
6783 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6785 24. Added sender and host information to the "rejected by local_scan()" log
6786 line; previously there was no indication of these.
6788 25. Added .include_if_exists.
6790 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6791 Linux. It turns out that not all file systems support this. Apparently some
6792 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6793 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6794 not supported on the file descriptor, is now ignored when Exim is trying to
6795 sync a directory. This applies only to Linux.
6797 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6799 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6800 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6803 29. Added support for maildirsize files from supplied patch (modified a bit).
6805 30. The use of :fail: followed by an empty string could lead Exim to respond to
6806 sender verification failures with (e.g.):
6808 550 Verification failed for <xxx>
6809 550 Sender verify failed
6811 where the first response line was missing the '-' that indicates it is not
6812 the final line of the response.
6814 31. The loop for finding the name of the user that called Exim had a hardwired
6815 limit of 10; it now uses the value of finduser_retries, which is used for
6816 all other user lookups.
6818 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6821 33. Exim was neglecting to zero errno before one call of strtol() when
6822 expanding a string and expecting an integer value. On some systems this
6823 resulted in spurious "integer overflow" errors. Also, it was casting the
6824 result into an int without checking.
6826 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6827 did not work. The code looks as if it has *never* worked, though it appears
6828 to have been documented since at least release 1.62. I have made it work.
6830 35. The "timeout_DNS" error in retry rules, also documented since at least
6831 1.62, also never worked. As it isn't clear exactly what this means, and
6832 clearly it isn't a major issue, I have abolished the feature by treating it
6833 as "timeout", and writing a warning to the main and panic logs.
6835 36. The display of retry rules for -brt wasn't always showing the error code
6838 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6839 timeout_connect_A, timeout_connect_MX.
6841 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6842 to the empty sender.
6844 39. The daemon was not analysing the content of -oX till after it had closed
6845 stderr and disconnected from the controlling terminal. This meant that any
6846 syntax errors were only noted on the panic log, and the return code from
6847 the command was 0. By re-arranging the code a little, I've made the
6848 decoding happen first, so such errors now appear on stderr, and the return
6849 code is 1. However, the actual setting up of the sockets still happens in
6850 the disconnected process, so errors there are still only recorded on the
6853 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6854 connections (as happens on some IP stacks) was logged at start up time as
6855 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6856 it from "IPv6 and IPv4", which means that two separate sockets are being
6859 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6860 says whether AF_INET or AF_INET6 was passed as an argument.
6862 42. Exiwhat output was messed up when time zones were included in log
6865 43. Exiwhat now gives more information about the daemon's listening ports,
6866 and whether -tls-on-connect was used.
6868 44. The "port" option of the smtp transport is now expanded.
6870 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6871 silently ignored. Now an error message is written to the main and panic
6874 46. There's a new ACL modifier called "logwrite" which writes to a log file
6875 as soon as it is encountered.
6877 47. Added $local_user_uid and $local_user_gid at routing time.
6879 48. Exim crashed when trying to verify a sender address that was being
6882 49. Exim was recognizing only a space character after ".include". It now also
6883 recognizes a tab character.
6885 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6886 extracting the relevant information from the specification. The man page no
6887 longer contains scrambled data for the -d option, and I've added a section
6888 at the front about calling Exim under different names.
6890 51. Added "extra_headers" argument to the "mail" command in filter files.
6892 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6895 53. Installed eximstats 1.29.
6897 54. Added transport_filter_timeout as a generic transport option.
6899 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6900 Cc: header lines. This was required by RFC 822, but it not required by RFC
6903 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6904 incoming messages that did not have them. Now it does so only if the
6905 message originates locally, that is, if there is no associated remote host
6906 address. When Resent- header lines are present, this applies to the Resent-
6907 lines rather than the non-Resent- lines.
6909 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6910 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6912 58. Messages for configuration errors now include the name of the main
6913 configuration file - useful now that there may be more than one file in a
6914 list (.included file names were always shown).
6916 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6917 for those rare installations that do not start the daemon as root or run it
6918 setuid root. I've cut out the call to initgroups() if the daemon is not
6921 60. The Exim user and group can now be bound into the binary as text strings
6922 that are looked up at the start of Exim's processing.
6924 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6926 62. Added $mailstore_basename variable.
6928 63. Installed patch to sieve.c from Michael Haardt.
6930 64. When Exim failed to open the panic log after failing to open the main log,
6931 the original message it was trying to log was written to stderr and debug
6932 output, but if they were not available (the usual case in production), it
6933 was lost. Now it is written to syslog before the two lines that record the
6934 failures to open the logs.
6936 65. Users' Exim filters run in subprocesses under the user's uid. It is
6937 possible for a "deliver" command or an alias in a "personal" command to
6938 provoke an address rewrite. If logging of address rewriting is configured,
6939 this fails because the process is not running as root or exim. There may be
6940 a better way of dealing with this, but for the moment (because 4.30 needs
6941 to be released), I have disabled address rewrite logging when running a
6942 filter in a non-root, non-exim process.
6948 1. The buildconfig auxiliary program wasn't quoting the value set for
6949 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6950 not defined. This bug was masked in 4.22 by the effect that was fixed in
6953 2. Some messages that were rejected after a message id was allocated were
6954 shown as "incomplete" by exigrep. It no longer does this for messages that
6955 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6957 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6958 have allow_domain_literals set, the ID did not get logged in the <= line.
6959 Domain literals are now always recognized in Message-ID: header lines.
6961 4. The first argument for a ${extract expansion item is the key name or field
6962 number. Leading and trailing spaces in this item were not being ignored,
6963 causing some misleading effects.
6965 5. When deliver_drop_privilege was set, single queue runner processes started
6966 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6967 same command in the process it spins off) were not dropping privilege.
6969 6. When the daemon running as "exim" started a queue runner, it always
6970 re-executed Exim in the spun-off process. This is a waste of effort when
6971 deliver_drop_privilege is set. The new process now just calls the
6972 queue-runner function directly.
6978 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6981 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6982 ignored. Though the use of -oP was forcing the writing of a pid file, it
6983 was always written to the default place.
6985 3. If the message "no IP address found for host xxxx" is generated during
6986 incoming verification, it is now followed by identification of the incoming
6987 connection (so you can more easily find what provoked it).
6989 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6991 5. Added some features to "harden" Exim a bit more against certain attacks:
6993 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6994 be put in Local/Makefile. This is like the never_users runtime option,
6995 but it cannot be overridden. The default setting is "root".
6997 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6998 prefix string with which any file named in a -C command line option
7001 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7002 is retained for -C and -D only if the caller of Exim is root. Without
7003 it, the exim user may also use -C and -D and retain privilege.
7005 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7006 command line option is disabled.
7008 6. Macro names set by the -D option must start with an upper case letter, just
7009 like macro names defined in the configuration file.
7011 7. Added "dereference=" facility to LDAP.
7013 8. Two instances of the typo "uknown" in the source files are fixed.
7015 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7016 the Configure-Makefile script screwed up while processing it.
7018 10. Incorporated PCRE 4.4.
7020 11. The SMTP synchronization check was not operating right at the start of an
7021 SMTP session. For example, it could not catch a HELO sent before the client
7022 waited for the greeting. There is now a check for outstanding input at the
7023 point when the greeting is written. Because of the duplex, asynchronous
7024 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7025 way, but not yet received, when the check is performed.
7027 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7028 on TCP/IP sockets, because this apparently causes some broken clients to
7031 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7032 unchanged) from the Cygwin maintainer.
7034 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7035 was supported instead of testing for mbx. Effectively a typo.
7037 15. The spa authenticator server code was not checking that the input it
7038 received was valid base64.
7040 16. The debug output line for the "set" modifier in ACLs was not showing the
7041 name of the variable that was being set.
7043 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7045 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7046 lookup on its own. Something else was needed to trigger the lookup. For
7047 example, a match in host_lookup or the need for a host name in a host list.
7048 Now, if $sender_host_name is referenced and the host name has not yet been
7049 looked up, a lookup is performed. If the lookup fails, the variable remains
7050 empty, and $host_lookup_failed is set to "1".
7052 19. Added "eqi" as a case-independent comparison operator.
7054 20. The saslauthd authentication condition could segfault if neither service
7055 nor realm was specified.
7057 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7058 error message that was logged was misleading, and incoming SMTP
7059 connections were dropped. The message is now more accurate, and temporary
7060 errors are given to SMTP connections.
7062 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7063 (except RSET) with a 421 error, until QUIT is received. However, it was
7064 failing to send a response to QUIT.
7066 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7067 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7068 ACL is now run after the helo_try_verify_hosts code.
7070 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7071 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7072 case-independent, so other case variants are also recognized). Apparently
7073 some systems use these upper case variants.
7075 25. If more than two messages were waiting for the same host, and a transport
7076 filter was specified for the transport, Exim sent two messages over the
7077 same TCP/IP connection, and then failed with "socket operation on non-
7078 socket" when it tried to send the third.
7080 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7082 27. The extern definition of crypt16() in expand.c was not being excluded when
7083 the OS had its own crypt16() function.
7085 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7086 as a preferred synonym for return_size_limit, both as an option and as an
7089 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7091 30. Changed the default configuration ACL to relax the local part checking rule
7092 for addresses that are not in any local domains. For these addresses,
7093 slashes and pipe symbols are allowed within local parts, but the sequence
7094 /../ is explicitly forbidden.
7096 31. SPA server authentication was not clearing the challenge buffer before
7099 32. log_message in a "warn" ACL statement was writing to the reject log as
7100 well as to the main log, which contradicts the documentation and doesn't
7101 seem right (because no rejection is happening). So I have stopped it.
7103 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7104 However, I am unable to do any testing of this.
7106 34. Fixed an infelicity in the appendfile transport. When checking directories
7107 for a mailbox, to see if any needed to be created, it was accidentally
7108 using path names with one or more superfluous leading slashes; tracing
7109 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7111 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7112 contents are added to the log line that is written for every discarded
7113 recipient. (Previously a log_message setting was ignored.)
7115 36. The ${quote: operator now quotes the string if it is empty.
7117 37. The install script runs exim in order to find its version number. If for
7118 some reason other than non-existence or emptiness, which it checks, it
7119 could not run './exim', it was installing it with an empty version number,
7120 i.e. as "exim-". This error state is now caught, and the installation is
7123 38. An argument was missing from the function that creates an error message
7124 when Exim fails to connect to the socket for saslauthd authentication.
7125 This could cause Exim to crash, or give a corrupted message.
7127 39. Added isip, isip4, and isip6 to ${if conditions.
7129 40. The ACL variables $acl_xx are now saved with the message, and can be
7130 accessed later in routers, transports, and filters.
7132 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7133 strings in the file are not string-expanded.
7135 42. If a MAIL command specified a SIZE value that was too large to fit into an
7136 int variable, the check against message_size_limit failed. Such values are
7137 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7138 day this will have to be increased, but I don't think I want to be around
7139 when emails are that large.
7146 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7147 iconv() is not standard in FreeBSD.
7149 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7150 IPv6 enabled. The observed symptom was a segmentation fault on return from
7151 the function os_common_find_running_interfaces() in src/os.c.
7153 3. In the check_special_case() function in daemon.c I had used "errno" as an
7154 argument name, which causes warnings on some systems. This was basically a
7155 typo, since it was named "eno" in the comments!
7157 4. The code that waits for the clock to tick (at a resolution of some fraction
7158 of a second) so as to ensure message-id uniqueness was always waiting for
7159 at least one whole tick, when it could have waited for less. [This is
7160 almost certainly not relevant at current processor speeds, where it is
7161 unlikely to ever wait at all. But we try to future-proof.]
7163 5. The function that sleeps for a time interval that includes fractions of a
7164 second contained a race. It did not block SIGALRM between setting the
7165 timer, and suspending (a couple of lines later). If the interval was short
7166 and the sigsuspend() was delayed until after it had expired, the suspension
7167 never ended. On busy systems this could lead to processes getting stuck for
7170 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7171 process, before it forks any delivery processes. The open lookup caching
7172 mechanism meant that the open file or database connection was passed into
7173 the delivery process. The problem was that delivery processes always tidy
7174 up cached lookup data. This could cause a problem for the next delivery
7175 process started by the queue runner, because the external queue runner
7176 process does not know about the closure. So the next delivery process
7177 still has data in the lookup cache. In the case of a file lookup, there was
7178 no problem because closing a file descriptor in a subprocess doesn't affect
7179 the parent. However, if the lookup was caching a connection to a database,
7180 the connection was closed, and the second delivery process was likely to
7181 see errors such as "PGSQL: query failed: server closed the connection
7182 unexpectedly". The problem has been fixed by closing all cached lookups
7183 in a queue runner before running a delivery process.
7185 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7186 seem to have the "const" qualifier which it has on other OS. I've
7189 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7190 *of the same type* (client or server) with the same public name that an
7191 error should be diagnosed.
7193 9. When Exim looked up a host name for an IP address, but failed to find the
7194 original IP address when looking up the host name (a safety check), it
7195 output the message "<ip address> does not match any IP for NULL", which was
7196 confusing, to say the least. The bug was that the host name should have
7197 appeared instead of "NULL".
7199 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7200 user that is built into the binary, and the -C or -D options is used, root
7201 privilege is dropped before the configuration file is read. In addition,
7202 logging is switched to stderr instead of the normal log files. If the
7203 configuration then re-defines the Exim user, the unprivileged environment
7204 is probably not what is expected, so Exim logs a panic warning message (but
7207 However, if deliver_drop_privilege is set, the unprivileged state may well
7208 be exactly what is intended, so the warning has been cut out in that case,
7209 and Exim is allowed to try to write to its normal log files.
7215 1. smtp_return_error_details was not giving details for temporary sender
7216 or receiver verification errors.
7218 2. Diagnose a configuration error if two authenticators have the same public
7221 3. Exim used not to create the message log file for a message until the first
7222 delivery attempt. This could be confusing when incoming messages were held
7223 for policy or load reasons. The message log file is now created at the time
7224 the message is received, and an initial "Received" line is written to it.
7226 4. The automatically generated man page for command line options had a minor
7227 bug that caused no ill effects; however, a more serious problem was that
7228 the procedure for building the man page automatically didn't always
7229 operate. Consequently, release 4.20 contains an out-of-date version. This
7230 shouldn't happen again.
7232 5. When building Exim with embedded Perl support, the script that builds the
7233 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7234 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7236 6. The freeze_tell option was not being used for messages that were frozen on
7237 arrival, either by an ACL or by local_scan().
7239 7. Added the smtp_incomplete_transaction log selector.
7241 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7242 was accepting AUTH without a new EHLO.
7244 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7245 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7248 10. Logging of TCP/IP connections (when configured) now happens in the main
7249 daemon process instead of the child process, so that the TCP/IP connection
7250 count is more accurate (but it can never be perfect).
7252 11. The use of "drop" in a nested ACL was not being handled correctly in the
7253 outer ACL. Now, if condition failure induced by the nested "drop" causes
7254 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7255 or "require"), the connection is dropped.
7257 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7258 that yield "discard" can now be used with an "accept" or a "discard" verb,
7259 but an error is generated for any others (because I can't see a useful way
7260 to define what should happen).
7262 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7263 are now processed in the same way as lines in the Exim configuration file.
7264 In particular, continuation lines are supported.
7266 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7268 15. Added -ti meaning -t -i.
7270 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7271 domains, and warn by logging if others are found.
7273 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7274 returned from GIFCONF when Exim is trying to find the list of interfaces on
7275 a host. The code in os.c has been modified to copy each ifreq to an aligned
7276 structure in all cases.
7278 Also, in some cases, the returned ifreq's were being copied to a 'struct
7279 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7280 means the last couple of bytes of an IPv6 address could be chopped if the
7281 ifreq contained only a normal sockaddr (14 bytes storage).
7283 18. Named domain lists were not supported in the hosts_treat_as_local option.
7284 An entry such as +xxxx was not recognized, and was treated as a literal
7287 19. Ensure that header lines added by a DATA ACL are included in the reject log
7288 if the ACL subsequently rejects the message.
7290 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7291 MD5 (which is deprecated).
7293 21. When testing a filter file using -bf, Exim was writing a message when it
7294 took the sender from a "From " line in the message, but it was not doing so
7295 when it took $return_path from a Return-Path: header line. It now does.
7297 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7298 with a valid header line field name (a series of printing characters
7299 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7301 23. Changed "disc" in the source to "disk" to conform to the documentation and
7302 the book and for uniformity.
7304 24. Ignore Sendmail's -Ooption=value command line item.
7306 25. When execve() failed while trying to run a command in a pipe transport,
7307 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7308 could be confused with a return value of 69 from the command itself. This
7309 has been changed to 127, the value the shell returns if it is asked to run
7310 a non-existent command. The wording for the related log line suggests a
7311 non-existent command as the problem.
7313 26. If received_header_text expands to an empty string, do not add a Received:
7314 header line to the message. (Well, it adds a token one on the spool, but
7315 marks it "old" so that it doesn't get used or transmitted.)
7317 27. Installed eximstats 1.28 (addition of -nt option).
7319 28. There was no check for failure on the call to getsockname() in the daemon
7320 code. This can fail if there is a shortage of resources on the system, with
7321 ENOMEM, for example. A temporary error is now given on failure.
7323 29. Contrary to the C standard, it seems that in some environments, the
7324 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7325 program. Exim now does this explicitly; it affects the formatting of
7326 timestamps using strftime().
7328 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7329 complaints. I've now initialized all the variables, to avoid this.
7331 32. Header lines added by a system filter were not being "seen" during
7332 transport-time rewrites.
7334 33. The info_callback() function passed to OpenSSL is set up with type void
7335 (*)(SSL *, int, int), as described somewhere. However, when calling the
7336 function (actually a macro) that sets it up, the type void(*)() is
7337 expected. I've put in a cast to prevent warnings from picky compilers.
7339 34. If a DNS black list lookup found a CNAME record, but there were no A
7340 records associated with the domain it pointed at, Exim crashed.
7342 35. If a DNS black list lookup returned more than one A record, Exim ignored
7343 all but the first. It now scans all returned addresses if a particular IP
7344 value is being sought. In this situation, the contents of the
7345 $dnslist_value variable are a list of all the addresses, separated by a
7348 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7349 to accept a host name and all its aliases if the forward lookup for any of
7350 them yielded the IP address of the incoming connection. Now it accepts only
7351 those names whose forward lookup yields the correct IP address. Any other
7352 names are discarded. This closes a loophole whereby a rogue DNS
7353 administrator could create reverse DNS records to break through a
7354 wildcarded host restriction in an ACL.
7356 37. If a user filter or a system filter that ran in a subprocess used any of
7357 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7358 the wrong values were passed to the pipe command ($thisaddress had the
7359 value of $0, $0 had the value of $1, etc). This bug was introduced by
7360 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7362 38. Improved the line breaking for long SMTP error messages from ACLs.
7363 Previously, if there was no break point between 40 and 75 characters, Exim
7364 left the rest of the message alone. Two changes have been made: (a) I've
7365 reduced the minimum length to 35 characters; (b) if it can't find a break
7366 point between 35 and 75 characters, it looks ahead and uses the first one
7367 that it finds. This may give the occasional overlong line, but at least the
7368 remaining text gets split now.
7370 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7371 file descriptors might be low, and that setting 1000 would always raise it.
7372 It turns out that in some environments, the limit is already over 1000 and
7373 that lowering it causes trouble. So now Exim takes care not to decrease it.
7375 40. When delivering a message, the value of $return_path is set to $sender_
7376 address at the start of routing (routers may change the value). By an
7377 oversight, this default was not being set up when an address was tested by
7378 -bt or -bv, which affected the outcome if any router or filter referred to
7381 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7382 log only when "message" or "log_message" are set. However, if one of the
7383 conditions was an address verification, or a call to a nested ACL, the
7384 messages generated by the underlying test were being passed through. This
7385 no longer happens. The underlying message is available in $acl_verify_
7386 message for both "message" and "log_message" expansions, so it can be
7387 passed through if needed.
7389 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7390 new expansion $bh_ to give the encoded byte string without charset
7391 translation. Translation happens only if iconv() is available; HAVE_ICONV
7392 indicates this at build time. HEADERS_CHARSET gives the charset to
7393 translate to; headers_charset can change it in the configuration, and
7394 "headers charset" can change it in an individual filter file.
7396 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7397 that creates RFC 2047 encoded "words" labels them as that charset instead
7398 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7399 expansion operator; (ii) when Exim creates a From: line for a local
7400 message; (iii) when a header line is rewritten to include a "phrase" part.
7402 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7403 buggy, causing it to skip the first lines of messages whose message ID
7404 ended in 'D'. This would not have bitten before Exim release 4.14, because
7405 message IDs were unlikely to end in 'D' before then. The effect was to have
7406 incorrect size information for certain domains.
7408 45. #include "config.h" was missing at the start of the crypt16.c module. This
7409 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7412 46. If there was a timeout during a "random" callout check, Exim treated it as
7413 a failure of the random address, and carried on sending RSET and the real
7414 address. If the delay was just some slowness somewhere, the response to the
7415 original RCPT would be taken as a response to RSET and so on, causing
7416 mayhem of various kinds.
7418 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7419 when I implemented it. It didn't allow for the fact that some option values
7420 may legitimately be negative (e.g. size_addition), and it didn't even do
7421 the right test for positive values.
7423 48. Domain names in DNS records are case-independent. Exim always looks them up
7424 in lower case. Some resolvers return domain names in exactly the case they
7425 appear in the zone file, that is, they may contain uppercase letters. Not
7426 all resolvers do this - some return always lower case. Exim was treating a
7427 change of case by a resolver as a change of domain, similar to a widening
7428 of a domain abbreviation. This triggered its re-routing code and so it was
7429 trying to route what was effectively the same domain again. This normally
7430 caused routing to fail (because the router wouldn't handle the domain
7431 twice). Now Exim checks for this case specially, and just changes the
7432 casing of the domain that it ultimately uses when it transmits the message
7435 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7438 50. If a filter generated a file delivery with a non-absolute name (possible if
7439 no home directory exists for the router), the forbid_file option was not
7442 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7443 the existing equality matching.
7445 52. Exim was using ints instead of ino_t variables in some places where it was
7446 dealing with inode numbers.
7448 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7449 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7450 called TMPDIR, and if it finds it is different, it changes its value.
7452 54. The smtp_printf() function is now made available to local_scan() so
7453 additional output lines can be written before returning. There is also an
7454 smtp_fflush() function to enable the detection of a dropped connection.
7455 The variables smtp_input and smtp_batched_input are exported to
7458 55. Changed the default runtime configuration: the message "Unknown user"
7459 has been removed from the ACL, and instead placed on the localuser router,
7460 using the cannot_route_message feature. This means that any verification
7461 failures that generate their own messages won't get overridden. Similarly,
7462 the "Unrouteable address" message that was in the ACL for unverifiable
7463 relay addresses has also been removed.
7465 56. Added hosts_avoid_esmtp to the smtp transport.
7467 57. The exicyclog script was not checking for the esoteric option
7468 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7469 will work only if exicyclog is run under the appropriate euid.
7471 58. Following a discussion on the list, the rules by which Exim recognises line
7472 endings on incoming messages have been changed. The -dropcr and drop_cr
7473 options are now no-ops, retained only for backwards compatibility. The
7474 following line terminators are recognized: LF CRLF CR. However, special
7475 processing applies to CR:
7477 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7478 nor a local message in the state where . is a terminator.
7480 (ii) If a bare CR is encountered in a header line, an extra space is added
7481 after the line terminator so as not to end the header. The reasoning
7482 behind this is that bare CRs in header lines are most likely either
7483 to be mistakes, or people trying to play silly games.
7485 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7486 was being incorrectly given as 18 bytes larger than it should have been.
7487 This is a VOB (very old bug).
7489 60. This may never have affected anything current, but just in case it has:
7490 When the local host is found other than at the start of a list of hosts,
7491 the local host, those with the same MX, and any that follow, are discarded.
7492 When the list in question was part of a longer list of hosts, the following
7493 hosts (not currently being processed) were also being discarded. This no
7494 longer happens. I'm not sure if this situation could ever has previously
7497 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7500 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7501 header. This is something that is recommended in a new Internet Draft, and
7502 is something that is documented as being done by Sendmail. There are two
7503 possible values. For messages generated by the autoreply transport, Exim
7506 Auto-Submitted: auto-replied
7508 whereas for all other generated messages (e.g. bounces) it adds
7510 Auto-Submitted: auto-generated
7512 63. The "personal" condition in filters now includes a test for the
7513 Auto-Submitted: header. If it contains the string "auto-" the message it
7514 not considered personal.
7516 64. Added rcpt_include_affixes as a generic transport option.
7518 65. Added queue_only_override (default true).
7520 66. Added the syslog_duplication option.
7522 67. If what should have been the first header line of a message consisted of
7523 a space followed by a colon, Exim was mis-interpreting it as a header line.
7524 It isn't of course - it is syntactically invalid and should therefore be
7525 treated as the start of the message body. The misbehaviour could have
7526 caused a number of strange effects, including loss of data in subsequent
7527 header lines, and spool format errors.
7529 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7530 client host had authenticated. This control can now be exercised by an ACL
7531 for more flexibility.
7533 69. By default, callouts do not happen when testing with -bh. There is now a
7534 variant, -bhc, which does actually run the callout code, including
7535 consulting and updating the callout cache.
7537 70. Added support for saslauthd authentication, courtesy of Alexander
7540 71. If statvfs() failed on the spool or log directories while checking their
7541 size for availability, Exim confusingly gave the error "space shortage".
7542 Furthermore, in debugging mode it crashed with a floating point exception.
7543 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7544 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7545 serious problem, Exim now writes to the main and panic logs when this
7546 happens, with details of the failure. It then refuses to accept the
7547 incoming message, giving the message "spool directory problem" or "log
7548 directory problem" with a 421 code for SMTP messages.
7550 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7551 0, 1, and 2 exist, because some OS complain for execs without them (see
7552 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7553 descriptors. However, the code omitted to check that the open succeeded,
7554 causing mysterious errors if for some reason the permissions on /dev/null
7555 got screwed. Now Exim writes a message to the main and panic logs, and
7556 bombs out if it can't open /dev/null.
7558 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7559 interact so that it is all more flexible. It is supposed to remain
7560 backwards compatible. Also added extra_local_interfaces.
7562 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7563 to bomb out with an assertion failure - to the client this appears as a
7564 connection drop. This problem occurs in the part of the code that was taken
7565 from the Samba project. Fortunately, the assertion is in a very simple
7566 function, so I have fixed this by reproducing the function inline in the
7567 one place where it is called, and arranging for authentication to fail
7568 instead of killing the process with assert().
7570 75. The SPA client code was not working when the server requested OEM rather
7571 than Unicode encoding.
7573 76. Added code to make require_files with a specific uid setting more usable in
7574 the case where statting the file as root fails - usually a non-root-mounted
7575 NFS file system. When this happens and the failure is EACCES, Exim now
7576 forks a subprocess and does the per-uid checking as the relevant uid.
7578 77. Added process_log_path.
7580 78. If log_file_path was not explicitly set, a setting of check_log_space or
7581 check_log_inodes was ignored.
7583 79. If a space check for the spool or log partitions fails, the incident is now
7584 logged. Of course, in the latter case the data may get lost...
7586 80. Added the %p formatting code to string_format() so that it can be used to
7587 print addresses in debug_print(). Adjusted all the address printing in the
7588 debugging in store.c to use %p rather than %d.
7590 81. There was a concern that a line of code in smtp_in.c could overflow a
7591 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7592 initially expressed, the concern was not well-founded, because trailing
7593 spaces are removed early. However, if the trailing spaces were followed by
7594 a NULL, they did not get removed, so the overflow was possible. Two fixes
7597 (a) I re-wrote the offending code in a cleaner fashion.
7598 (b) If an incoming SMTP command contains a NULL character, it is rejected
7601 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7602 runs initgroups(), so that if the Exim user is in any additional groups,
7603 they will be used during message reception.
7609 The change log for 4.20 and earlier releases has been archived.