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.
31 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
32 on-stack buffers were used, resulting in a taint trap when DSN information
33 copied from a received message was written into the buffer.
39 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
40 side, to decode a TLS 1.3 packet capture.
42 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
43 Previously the default library behaviour applied, sending two, each in
46 JH/03 Debug output for ACL now gives the config file name and line number for
49 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
51 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
53 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
54 buffer overrun for (non-chunking) other transports.
56 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
57 TLS1.3, means that a server rejecting a client certificate is not visible
58 to the client until the first read of encrypted data (typically the
59 response to EHLO). Add detection for that case and treat it as a failed
60 TLS connection attempt, so that the normal retry-in-clear can work (if
63 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
64 and/or domain. Found and fixed by Jason Betts.
66 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
67 configuration). If a CNAME target was not a wellformed name pattern, a
70 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
71 the OS reports them interleaved with other addresses.
73 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
74 used both for input and for a verify callout, both encrypted, SMTP
75 responses being sent by the server could be lost. This resulted in
76 dropped connections and sometimes bounces generated by a peer sending
79 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
80 string. Previously it was possible to cause undefined behaviour in a
81 library routine (usually a crash). Found by "zerons".
83 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
86 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
87 API was removed, so update to use the newer ones.
89 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
90 any timeout set, is taking a long time. Previously we would hang on to a
91 rotated logfile "forever" if the input was arriving with long gaps
92 (a previous attempt to fix addressed lack, for a long time, of initial
95 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
96 shared (NFS) environment. The length of the tempfile name is now
97 4 + 16 ("hdr.$message_exim_id") which might break on file
98 systems which restrict the file name length to lower values.
101 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
102 shared (NFS) environment.
104 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
105 did for all versions <4.90). Notably -M, -m, --invert, -I may be
108 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
109 on some platforms for bit 31.
111 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
112 to changes apparently associated with TLS1.3 handling some of the APIs
113 previously used were either nonfunctional or inappropriate. Strings
114 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
115 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
116 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
117 This affects log line X= elements, the $tls_{in,out}_cipher variables,
118 and the use of specific cipher names in the encrypted= ACL condition.
120 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
122 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
123 verification result was not updated unless hosts_require_ocsp applied.
125 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
126 queue_list_requires_admin set to false, non-admin users were denied the
129 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
130 directory-of-certs mode. Previously they were advertised despite the
133 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
134 A single TCP connection by a client will now hold a TLS connection open
135 for multiple message deliveries, by default. Previoud the default was to
138 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
139 default. If built with the facility, DANE will be used. The facility
140 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
142 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
143 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
144 must be defined and you must still, unless you define DISABLE_TLS, manage
145 the the include-dir and library-file requirements that go with that
146 choice. Non-TLS builds are still supported.
148 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
151 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
152 default. If the platform supports and has the facility enabled, it will
153 be requested on all coneections.
155 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
156 controlled by the build-time option SUPPORT_PIPE_CONNECT.
158 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
160 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
161 success-DSN messages. Previously the From: header was always the default
162 one for these; the option was ignored.
164 JH/28 Fix the timeout on smtp response to apply to the whole response.
165 Previously it was reset for every read, so a teergrubing peer sending
166 single bytes within the time limit could extend the connection for a
167 long time. Credit to Qualsys Security Advisory Team for the discovery.
169 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
170 delivery address, which leaked information of the results of local
171 forwarding. Change to the original envelope recipient address, per
174 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
175 requested. Previously not bounce was generated and a log entry of
176 error ignored was made.
178 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
180 JH/32 Introduce a general tainting mechanism for values read from the input
181 channel, and values derived from them. Refuse to expand any tainted
182 values, to catch one form of exploit.
184 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
185 was unused and the unexpanded text used for the test. Found and
186 fixed by Ruben Jenster.
188 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
189 an attempt to use a TLS library read routine dereffed a nul pointer,
192 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
193 them in our smtp response.
195 JH/36 Have the general router option retry_use_local_part default to true when
196 any of the restrictive preconditions are set (to anything). Previously it
197 was only for check_local user. The change removes one item of manual
198 configuration which is required for proper retries when a remote router
199 handles a subset of addresses for a domain.
201 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
202 link count into consideration.
204 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
205 caused the extension of big_buffer, the following lines were ignored.
207 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
208 accordance with RFC 2308. Previously there was no expiry, so a longlived
209 receive process (eg. due to ACL delays) versus a short SOA value could
212 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
214 JH/39 Promote DMARC support to mainline.
216 JH/40 Bug 2452: Add a References: header to DSNs.
218 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
219 parameters. The relevant library call is documented as "Deprecated: This
220 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
221 3.6.0, DH parameters are negotiated following RFC7919."
223 HS/06 Change the default of dnssec_request_domains to "*"
225 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
226 carried on and emitted a BDAT command, even when PIPELINING was not
229 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
230 buffer was used for the filename, resulting in a trap when tainted
231 arguments (eg. $domain) were used.
233 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
234 recommended to avoid a possible server-load attack. The feature can be
235 re-enabled via the openssl_options main cofiguration option.
237 JH/45 local_scan API: documented the current smtp_printf() call. This changed
238 for version 4.90 - adding a "more data" boolean to the arguments.
239 Bumped the ABI version number also, this having been missed previously;
240 release versions 4.90 to 4.92.3 inclusive were effectively broken in
241 respect of usage of smtp_printf() by either local_scan code or libraries
242 accessed via the ${dlfunc } expansion item. Both will need coding
243 adjustment for any calls to smtp_printf() to match the new function
244 signature; a FALSE value for the new argument is always safe.
246 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
247 the file-offset (which the Linux syscall does, and exim expects); this
248 resulted in an indefinite loop.
250 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
251 to do ARC verification. The Authentication-Results: header line added
252 by the configuration then had no ARC item.
258 JH/01 Remove code calling the customisable local_scan function, unless a new
259 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
261 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
262 non-signal-safe functions being used.
264 JH/03 Bug 2269: When presented with a received message having a stupidly large
265 number of DKIM-Signature headers, disable DKIM verification to avoid
266 a resource-consumption attack. The limit is set at twenty.
268 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
269 report of oldest_pass in ${authres } in consequence, and separate out
270 some descriptions of reasons for verification fail.
272 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
273 files in the spool were present and unlocked. A queue-runner could spot
274 them, resulting in a duplicate delivery. Fix that by doing the unlock
275 after the unlink. Investigation by Tim Stewart. Take the opportunity to
276 add more error-checking on spoolfile handling while that code is being
279 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
280 No known attacks, no CVE, this is defensive hardening.
282 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
283 a queue-runner could start a delivery while other operations were ongoing.
284 Cutthrough delivery was a common victim, resulting in duplicate delivery.
285 Found and investigated by Tim Stewart. Fix by using the open message data
286 file handle rather than opening another, and not locally closing it (which
287 releases a lock) for that case, while creating the temporary .eml format
288 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
290 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
291 $sender_verify_failure/$recipient_verify_failure to "random".
293 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
296 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
297 Previously this would segfault.
299 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
302 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
303 like zero, since the resolver should be doing this for us, But we need one
304 as a CNAME but no MX presence gets the CNAME returned; we need to check
305 that doesn't point to an MX to declare it "no MX returned" rather than
306 "error, loop". A new main option is added so the older capability of
307 following some limited number of chain links is maintained.
309 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
311 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
312 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
313 now-deprecated earlier definitions used only specified the range up to TLS
314 1.2 (in the older-version library docs).
316 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
318 JH/15 Rework TLS client-side context management. Stop using a global, and
319 explicitly pass a context around. This enables future use of TLS for
320 connections to service-daemons (eg. malware scanning) while a client smtp
321 connection is using TLS; with cutthrough connections this is quite likely.
323 JH/16 Fix ARC verification to do AS checks in reverse order.
325 JH/17 Support a "tls" option on the ${readsocket } expansion item.
327 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
328 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
329 Previously the "utf8" would be re-prepended for every additional message.
331 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
332 Previously thery were accepted, resulting in issues when attempting to
333 forward messages to a non-supporting MTA.
335 PP/02 Let -n work with printing macros too, not just options.
337 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
338 one parent address was copied, and bogus data was used at delivery-logging
339 time. Either a crash (after delivery) or bogus log data could result.
340 Discovery and analysis by Tim Stewart.
342 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
343 Previously if the string ended mid-character, we did not insert the
344 promised '?' replacement.
346 PP/04 Documentation: current string operators work on bytes, not codepoints.
348 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
349 should pack well giving a smaller memory footprint so better caching and
350 therefore performance. Group the declarations where this can't be done so
351 that the byte-sized flag variables are not interspersed among pointer
352 variables, giving a better chance of good packing by the compiler.
354 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
355 non-null, to avoid issues with sites running BATV. Previously reports were
356 sent with an empty envelope sender so looked like bounces.
358 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
359 The ignore_error flag wasn't being returned from the filter subprocess so
360 was not set for later routers. Investigation and fix by Matthias Kurz.
362 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
363 and a msg:complete for the whole, when a message is manually removed using
364 -Mrm. Developement by Matthias Kurz, hacked on by JH.
366 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
367 a "Gnu special" function, asprintf() in the DB utility binary builds; I
368 hope that is portable enough.
370 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
371 requiring a known-CA anchor certificate; make it now rely entirely on the
372 TLSA as an anchor. Checking the name on the leaf cert against the name
373 on the A-record for the host is still done for TA (but not for EE mode).
375 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
376 included in delivery lines for non-proxied connections, when compiled with
377 SUPPORT_SOCKS and running with proxy logging enabled.
379 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
380 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
381 move the existing event to fire before the normal logging of message
382 failure so that custom logging is bracketed by normal logging.
384 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
385 msg:fail:internal event. Developement by Matthias Kurz.
387 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
388 far too small for todays use of crypto signatures stored there. Go all
389 the way to the max DNS message size of 64kB, even though this might be
390 overmuch for IOT constrained device use.
392 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
393 copy a string over itself. The library routine is documented as not
394 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
396 JH/32 For main options check_spool_space and check_inode_space, where the
397 platform supports 64b integers, support more than the previous 2^31 kB
398 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
399 the previous G, M, k.
401 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
402 $authenticated_fail_id variable on authentication failure. Previously
405 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
406 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
407 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
408 GNUTLS_SEC_PARAM_MEDIUM.
410 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
411 side. Previously we would continue as if no SNI had been received.
413 JH/36 Harden the handling of string-lists. When a list consisted of a sole
414 "<" character, which should be a list-separator specification, we walked
415 off past the nul-terimation.
417 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
418 causes) even when the retry time is not yet met. Previously they were
419 not, meaning that when (say) an account was over-quota and temp-rejecting,
420 and multiple senders' messages were queued, only one sender would get
421 notified on each configured delay_warning cycle.
423 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
425 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
426 cipher-suites, an error can be left on the stack even for a succeeding
427 accept; this results in impossible error messages when a later operation
430 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
431 return error codes indicating retry. Under TLS1.3 this becomes required.
433 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
434 it only wrote the new authenticators, resulting in a lack of tracking of
435 peer changes of ESMTP extensions until the next cache flush.
437 JH/41 Fix the loop reading a message header line to check for integer overflow,
438 and more-often against header_maxsize. Previously a crafted message could
439 induce a crash of the recive process; now the message is cleanly rejected.
441 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
442 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
448 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
449 When redis_servers is set to a list of > 1 element, and the Redis servers
450 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
451 case of MOVED into a DEFER case instead, thus moving the query onto the
452 next server in the list. For a cluster of N elements, all N servers must
453 be defined in redis_servers.
455 GF/02 Catch and remove uninitialized value warning in exiqsumm
456 Check for existence of @ARGV before looking at $ARGV[0]
458 JH/01 Replace the store_release() internal interface with store_newblock(),
459 which internalises the check required to safely use the old one, plus
460 the allocate and data copy operations duplicated in both (!) of the
461 extant use locations.
463 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
464 modifier. This matches the restriction on the commandline.
466 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
467 Previously only the last row was returned.
469 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
470 we assumed that tags in the header were well-formed, and parsed the
471 element content after inspecting only the first char of the tag.
472 Assumptions at that stage could crash the receive process on malformed
475 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
476 While running the DKIM ACL we operate on the Permanent memory pool so that
477 variables created with "set" persist to the DATA ACL. Also (at any time)
478 DNS lookups that fail create cache records using the Permanent pool. But
479 expansions release any allocations made on the current pool - so a dnsdb
480 lookup expansion done in the DKIM ACL releases the memory used for the
481 DNS negative-cache, and bad things result. Solution is to switch to the
482 Main pool for expansions.
483 While we're in that code, add checks on the DNS cache during store_reset,
484 active in the testsuite.
485 Problem spotted, and debugging aided, by Wolfgang Breyha.
487 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
488 When none of the hosts presented to a transport match an already-open
489 connection, close it and proceed with the list. Previously we would
490 queue the message. Spotted by Lena with Yahoo, probably involving
493 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
494 Previously a spurious "250 OK id=" response was appended to the proper
497 JH/08 The "support for" informational output now, which built with Content
498 Scanning support, has a line for the malware scanner interfaces compiled
499 in. Interface can be individually included or not at build time.
501 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
502 by the template makefile "src/EDITME". The "STREAM" support for an older
503 ClamAV interface method is removed.
505 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
506 rows affected is given instead).
508 JH/11 The runtime Berkeley DB library version is now additionally output by
509 "exim -d -bV". Previously only the compile-time version was shown.
511 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
512 SMTP connection. Previously, when one had more receipients than the
513 first, an abortive onward connection was made. Move to full support for
514 multiple onward connections in sequence, handling cutthrough connection
515 for all multi-message initiating connections.
517 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
518 routers. Previously, a multi-recipient message would fail to match the
519 onward-connection opened for the first recipient, and cause its closure.
521 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
522 a timeout on read on a GnuTLS initiating connection, resulting in the
523 initiating connection being dropped. This mattered most when the callout
524 was marked defer_ok. Fix to keep the two timeout-detection methods
527 JH/15 Relax results from ACL control request to enable cutthrough, in
528 unsupported situations, from error to silently (except under debug)
529 ignoring. This covers use with PRDR, frozen messages, queue-only and
532 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
534 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
535 metadata, resulting in a crash in free().
537 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
538 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
539 Broken also in d185889f4, with init system revamp.
541 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
542 Previously we abruptly closed the connection after reading a malware-
543 found indication; now we go on to read the "scan ok" response line,
546 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
547 ACL. Previously, a crash would result.
549 JH/19 Speed up macro lookups during configuration file read, by skipping non-
550 macro text after a replacement (previously it was only once per line) and
551 by skipping builtin macros when searching for an uppercase lead character.
553 JH/20 DANE support moved from Experimental to mainline. The Makefile control
554 for the build is renamed.
556 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
557 was allocated for every new TLS startup, meaning one per message. Fix
558 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
560 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
561 reported the original. Fix to report (as far as possible) the ACL
562 result replacing the original.
564 JH/23 Fix memory leak during multi-message connections using STARTTLS under
565 OpenSSL. Certificate information is loaded for every new TLS startup,
566 and the resources needed to be freed.
568 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
570 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
573 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
574 DATA response info to the (existing) per-recipient response info for
575 the "C=" log element. It can have useful tracking info from the
576 destination system. Patch from Simon Arlott.
578 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
579 length value. Previously this would segfault.
581 HS/02 Support Avast multiline protoocol, this allows passing flags to
582 newer versions of the scanner.
584 JH/28 Ensure that variables possibly set during message acceptance are marked
585 dead before release of memory in the daemon loop. This stops complaints
586 about them when the debug_store option is enabled. Discovered specifically
587 for sender_rate_period, but applies to a whole set of variables.
588 Do the same for the queue-runner and queue-list loops, for variables set
589 from spool message files. Do the same for the SMTP per-message loop, for
590 certain variables indirectly set in ACL operations.
592 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
593 as a multi-recipient message from a mailinglist manager). The coding had
594 an arbitrary cutoff number of characters while checking for more input;
595 enforced by writing a NUL into the buffer. This corrupted long / fast
596 input. The problem was exposed more widely when more pipelineing of SMTP
597 responses was introduced, and one Exim system was feeding another.
598 The symptom is log complaints of SMTP syntax error (NUL chars) on the
599 receiving system, and refused recipients seen by the sending system
600 (propating to people being dropped from mailing lists).
601 Discovered and pinpointed by David Carter.
603 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
604 replaced by the ${authresults } expansion.
606 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
608 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
609 allows proper process termination in container environments.
611 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
612 Previously the "final dot" had a newline after it; ensure it is CR,LF.
614 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
615 and "err_perm", deprecated since 4.83 when the RFC-defined words
616 "temperror" and "permerror" were introduced.
618 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
619 transport-filters or DKIM-signing. The restriction was lost in the
620 consolidation of verify-callout and delivery SMTP handling.
621 Extend the restriction to also cover ARC-signing.
623 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
624 in defer=pass mode supply a 450 to the initiator. Previously the message
627 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
628 tls_require_ciphers is used as before.
630 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
631 "pass_unscanned". Only tmpfails from the scanner are written to
632 the paniclog, as they may require admin intervention (permission
633 denied, license issues). Other scanner errors (like decompression
634 bombs) do not cause a paniclog entry.
636 JH/36 Fix reinitialisation of DKIM logging variable between messages.
637 Previously it was possible to log spurious information in receive log
640 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
641 triggered odd behaviour from Outlook Express clients.
643 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
646 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
647 since the IETF WG has not yet settled on that versus the original
648 "bare" representation.
650 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
651 Previously the millisecond value corrupted the output.
652 Fix also for syslog_pid=no and log_selector +pid, for which the pid
653 corrupted the output.
659 JH/01 Rework error string handling in TLS interface so that the caller in
660 more cases is responsible for logging. This permits library-sourced
661 string to be attached to addresses during delivery, and collapses
662 pairs of long lines into single ones.
664 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
665 during configuration. Wildcards are allowed and expanded.
667 JH/02 Rework error string handling in DKIM to pass more info back to callers.
668 This permits better logging.
670 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
671 do not close it down and have the child transport start it up again on
672 the passed-on TCP connection. Instead, proxy the child (and any
673 subsequent ones) for TLS via a unix-domain socket channel. Logging is
674 affected: the continued delivery log lines do not have any DNSSEC, TLS
675 Certificate or OCSP information. TLS cipher information is still logged.
677 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
678 identical IP addresses on different listening ports. Will also affect
681 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
682 add noisy ifdef guards to special-case this sillyness.
683 Patch from Bernd Kuhls.
685 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
686 than 255 are no longer allowed.
688 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
689 Disable the session-cache too, which might reduce our load. Since we
690 currrectly use a new context for every connection, both as server and
691 client, there is no benefit for these.
692 GnuTLS appears to not support tickets server-side by default (we don't
693 call gnutls_session_ticket_enable_server()) but client side is enabled
694 by default on recent versions (3.1.3 +) unless the PFS priority string
697 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
698 <https://reproducible-builds.org/specs/source-date-epoch/>.
700 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
701 the check for any unsuccessful recipients did not notice the limit, and
702 erroneously found still-pending ones.
704 JH/08 Pipeline CHUNKING command and data together, on kernels that support
705 MSG_MORE. Only in-clear (not on TLS connections).
707 JH/09 Avoid using a temporary file during transport using dkim. Unless a
708 transport-filter is involved we can buffer the headers in memory for
709 creating the signature, and read the spool data file once for the
710 signature and again for transmission.
712 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
713 4.77 as the kernel support then wasn't solid, having issues in 64bit
714 mode. Now, it's been long enough. Add support for FreeBSD also.
716 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
717 case where the routing stage had gathered several addresses to send to
718 a host before calling the transport for the first, we previously failed
719 to close down TLS in the old transport process before passing the TCP
720 connection to the new process. The new one sent a STARTTLS command
721 which naturally failed, giving a failed delivery and bloating the retry
722 database. Investigation and fix prototype from Wolfgang Breyha.
724 JH/12 Fix check on SMTP command input synchronisation. Previously there were
725 false-negatives in the check that the sender had not preempted a response
726 or prompt from Exim (running as a server), due to that code's lack of
727 awareness of the SMTP input buffering.
729 PP/04 Add commandline_checks_require_admin option.
730 Exim drops privileges sanely, various checks such as -be aren't a
731 security problem, as long as you trust local users with access to their
732 own account. When invoked by services which pass untrusted data to
733 Exim, this might be an issue. Set this option in main configuration
734 AND make fixes to the calling application, such as using `--` to stop
737 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
738 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
739 responses to those, into a single TLS record each way (this usually means
740 a single packet). As a side issue, smtp_enforce_sync now works on TLS
743 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
744 affects you only if you're dancing at the edge of the param size limits.
745 If you are, and this message makes sense to you, then: raise the
746 configured limit or use OpenSSL 1.1. Nothing we can do for older
749 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
750 cmdline element to get the documented default one. Previously it was
753 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
754 are unsuable for non-message-specific reasons - eg. connection timeout,
755 banner-time rejection.
757 JH/16 Fix logging of delivery remote port, when specified by router, under
760 PP/06 Repair manualroute's ability to take options in any order, even if one
761 is the name of a transport.
764 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
766 JH/17 Change the list-building routines interface to use the expanding-string
767 triplet model, for better allocation and copying behaviour.
769 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
770 Previously it was constructed the first time a possibly-matching string
771 was met in the configuration file input during startup; now it is done
774 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
775 compatible one, to avoid the (poorly documented) possibility of a config
776 file in the working directory redirecting the DB files, possibly correpting
777 some existing file. CVE-2017-10140 assigned for BDB.
779 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
780 cache-hot. Previously, although the result was properly cached, the
781 initial verify call returned a defer.
783 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
784 the main verify for receipient in uncached-mode.
786 JH/22 Retire historical build files to an "unsupported" subdir. These are
787 defined as "ones for which we have no current evidence of testing".
789 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
790 if present. Previously it was ignored.
792 JH/24 Start using specified-initialisers in C structure init coding. This is
793 a C99 feature (it's 2017, so now considered safe).
795 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
796 if was a fixed-sized field and bitmask ops via macros; it is now more
799 PP/07 GitHub PR 56: Apply MariaDB build fix.
800 Patch provided by Jaroslav Škarvada.
802 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
803 during Coverity cleanups [4.87 JH/47]
804 Diagnosis and fix provided by Michael Fischer v. Mollard.
806 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
807 the right size to place the terminating semicolon on its own folded
808 line, the header hash was calculated to an incorrect value thanks to
809 the (relaxed) space the fold became.
811 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
812 and confused the parent.
814 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
815 which could crash as a result. This could lead to undeliverable messages.
817 JH/28 Logging: "next input sent too soon" now shows where input was truncated
820 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
821 matters on fast-turnover and PID-randomising systems, which were getting
822 out-of-order delivery.
824 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
825 a possibly-overlapping copy. The symptom was that "Remote host closed
826 connection in response to HELO" was logged instead of the actual 4xx
829 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
830 Previously only that bufferd was discarded, resulting in SYMTP command
833 JH/32 DKIM: when a message has multiple signatures matching an identity given
834 in dkim_verify_signers, run the dkim acl once for each. Previously only
835 one run was done. Bug 2189.
837 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
838 "panic the current process" to "deliberately defer". The panic log is
839 still written with the problem list name; the mail and reject logs now
840 get a temp-reject line for the message that was being handled, saying
841 something like "domains check lookup or other defer". The SMTP 451
842 message is still "Temporary local problem".
844 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
845 A crafted sequence of BDAT commands could result in in-use memory beeing
846 freed. CVE-2017-16943.
848 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
849 from SMTP input. Previously it was always done; now only done for DATA
850 and not BDAT commands. CVE-2017-16944.
852 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
853 to the message (such as an overlong header line). Previously this was
854 not done and we did not exit BDAT mode. Followon from the previous item
855 though a different problem.
861 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
862 than -2003 did; needs libidn2 in addition to libidn.
864 JH/02 The path option on a pipe transport is now expanded before use.
866 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
867 Patch provided by "Björn", documentation fix added too.
869 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
870 missing a wire-to-host endian conversion.
872 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
873 close after a BDAT command line could be taken as a following command,
874 giving a synch failure. Fix by only checking for synch immediately
875 before acknowledging the chunk.
877 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
878 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
879 macro. Patches provided by Josh Soref.
881 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
882 Previously we did not; the RFC seems ambiguous and VRFY is not listed
883 by IANA as a service extension. However, John Klensin suggests that we
886 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
887 the dkim code may be unix-mode line endings rather than smtp wire-format
888 CRLF, so prepend a CR to any bare LF.
890 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
891 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
893 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
894 the first were themselves being wrongly included in the feed into dkim
895 processing; with most chunk sizes in use this resulted in an incorrect
896 body hash calculated value.
898 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
899 DKIM signature block, for verification. Although advised against by
900 standards it is specifically not ruled illegal.
902 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
904 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
905 missing a body hash (the bh= tag).
907 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
908 It seems that HAProxy sends the Proxy Protocol information in clear and
909 only then does a TLS startup, so do the same.
911 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
912 TCP connections (such as for Spamd) unless the daemon successfully set
913 Fast Open mode on its listening sockets. This fixes breakage seen on
914 too-old kernels or those not configured for Fast Open, at the cost of
915 requiring both directions being enabled for TFO, and TFO never being used
916 by non-daemon-related Exim processes.
918 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
919 endings, at least on the first header line. Try to canonify any that get
920 past that check, despite the cost.
922 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
923 now limited to an arbitrary five deep, while parsing addresses with the
924 strip_excess_angle_brackets option enabled.
926 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
927 instead leave the unprompted TLS handshake in socket buffer for the
928 TLS library to consume.
930 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
932 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
934 JH/16 Drop variables when they go out of scope. Memory management drops a whole
935 region in one operation, for speed, and this leaves assigned pointers
936 dangling. Add checks run only under the testsuite which checks all
937 variables at a store-reset and panics on a dangling pointer; add code
938 explicitly nulling out all the variables discovered. Fixes one known
939 bug: a transport crash, where a dangling pointer for $sending_ip_address
940 originally assigned in a verify callout, is re-used.
942 PP/06 Drop '.' from @INC in various Perl scripts.
944 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
946 PP/08 Reduce a number of compilation warnings under clang; building with
947 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
948 should be warning-free.
950 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
952 HS/01 Fix portability problems introduced by PP/08 for platforms where
953 realloc(NULL) is not equivalent to malloc() [SunOS et al].
955 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
956 chunk. This allows us to accept broken chunked messages. We need a more
957 general solution here.
959 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
960 already-broken messages in the queue.
962 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
964 JH/19 Fix reference counting bug in routing-generated-address tracking.
970 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
971 supports it and a size is available (ie. the sending peer gave us one).
973 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
974 years of being deprecated). The replacements are the ACLs
975 acl_smtp_mime and acl_not_smtp_mime.
977 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
978 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
979 or even an in-clear connection were permitted. Now, if the host lookup
980 was dnssec and dane was requested then the host is only used if the
981 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
982 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
983 if one fails this test.
984 This means that a poorly-configured remote DNS will make it incommunicado;
985 but it protects against a DNS-interception attack on it.
987 JH/04 Bug 1810: make continued-use of an open smtp transport connection
988 non-noisy when a race steals the message being considered.
990 JH/05 If main configuration option tls_certificate is unset, generate a
991 self-signed certificate for inbound TLS connections.
993 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
994 in rewrites and routers.
996 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
997 and logged a warning sing 4.83; now they are a configuration file error.
999 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1000 (lacking @domain). Apply the same qualification processing as RCPT.
1002 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1004 JH/10 Support ${sha256:} applied to a string (as well as the previous
1007 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1008 a cutthrough deliver is pending, as we always want to make a connection.
1009 This also avoids re-routing the message when later placing the cutthrough
1010 connection after a verify cache hit.
1011 Do not update it with the verify result either.
1013 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1014 when routing results in more than one destination address.
1016 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1017 signing (which inhibits the cutthrough capability). Previously only
1018 the presence of an option was tested; now an expansion evaluating as
1019 empty is permissible (obviously it should depend only on data available
1020 when the cutthrough connection is made).
1022 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1023 the relevant preceding SMTP command did not note the pipelining mode.
1025 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1026 Previously they were not counted.
1028 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1029 as one having no matching records. Previously we deferred the message
1030 that needed the lookup.
1032 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1033 distinguished as "(=".
1035 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1036 for missing MX records. Previously it only worked for missing A records.
1038 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1040 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1041 after the data-go-ahead and data-ack. Patch from Jason Betts.
1043 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1044 even for a "none" policy. Patch from Tony Meyer.
1046 JH/22 Fix continued use of a connection for further deliveries. If a port was
1047 specified by a router, it must also match for the delivery to be
1050 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1051 When one of the recipients of a message was unsuitable for the connection
1052 (has no matching addresses), we lost track of needing to mark it
1053 deferred. As a result mail would be lost.
1055 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1057 JH/25 Decoding ACL controls is now done using a binary search; the source code
1058 takes up less space and should be simpler to maintain. Merge the ACL
1059 condition decode tables also, with similar effect.
1061 JH/26 Fix problem with one_time used on a redirect router which returned the
1062 parent address unchanged. A retry would see the parent address marked as
1063 delivered, so not attempt the (identical) child. As a result mail would
1066 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1067 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1068 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1071 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1072 Main config options check_{log,spool}_{inodes,space} are now
1073 100 inodes, 10MB unless set otherwise in the configuration.
1075 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1076 Previously it only applied to the main-section connection policy
1079 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1081 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1082 by me. Added RFC7919 DH primes as an alternative.
1084 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1085 are not in the system include path.
1087 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1088 GnuTLS, when a session startup failed (eg because the client disconnected)
1089 Exim did stdio operations after fclose. This was exposed by a recent
1090 change which nulled out the file handle after the fclose.
1092 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1093 signed directly by the cert-signing cert, rather than an intermediate
1094 OCSP-signing cert. This is the model used by LetsEncrypt.
1096 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1098 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1099 an incoming connection.
1101 HS/02 Bug 1802: Do not half-close the connection after sending a request
1104 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1105 fallback to "prime256v1".
1107 JH/34 SECURITY: Use proper copy of DATA command in error message.
1108 Could leak key material. Remotely exploitable. CVE-2016-9963.
1114 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1115 and 3.4.4 - once the server is enabled to respond to an OCSP request
1116 it does even when not requested, resulting in a stapling non-aware
1117 client dropping the TLS connection.
1119 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1120 support variable-length bit vectors. No functional change.
1122 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1123 The I= interface field on outgoing lines is now after the H= remote
1124 host field, same as incoming lines. There is a separate
1125 outgoing_interface log selector which allows you to disable the
1128 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1129 If not running log_selector +smtp_connection the mainlog would be held
1130 open indefinitely after a "too many connections" event, including to a
1131 deleted file after a log rotate. Leave the per net connection logging
1132 leaving it open for efficiency as that will be quickly detected by the
1133 check on the next write.
1135 HS/01 Bug 1671: Fix post transport crash.
1136 Processing the wait-<transport> messages could crash the delivery
1137 process if the message IDs didn't exist for some reason. When
1138 using 'split_spool_directory=yes' the construction of the spool
1139 file name failed already, exposing the same netto behaviour.
1141 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1142 mime_regex ACL conditions.
1144 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1145 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1146 to HELO, local diagnostic string.
1148 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1149 log line to debug. Even when configured with a tls authenticator many
1150 client connections are expected to not authenticate in this way, so
1151 an authenticate fail is not an error.
1153 HS/02 Add the Exim version string to the process info. This way exiwhat
1154 gives some more detail about the running daemon.
1156 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1157 matter for fast-change records such as DNSBLs.
1159 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1160 retry record, even if constant. There may be multiple transports with
1161 different interface settings and the retry behaviour needs to be kept
1164 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1166 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1168 JH/10 Bug 840: fix log_defer_output option of pipe transport
1170 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1171 hosts_randomize. This matters a lot when combined with mua_wrapper.
1173 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1174 ${quote_pgsql:<string>} operator.
1176 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1178 JH/14 Change header file name for freeradius-client. Relevant if compiling
1179 with Radius support; from the Gentoo tree and checked under Fedora.
1181 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1183 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1184 option transport_filter, meaning no filtering.
1186 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1188 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1189 defaults to "*" (all hosts). The variable is now available when not built
1190 with TLS, default unset, mainly to enable keeping the testsuite sane.
1191 If a server certificate is not supplied (via tls_certificate) an error is
1192 logged, and clients will find TLS connections fail on startup. Presumably
1193 they will retry in-clear.
1194 Packagers of Exim are strongly encouraged to create a server certificate
1195 at installation time.
1197 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1198 with the $config_file variable.
1200 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1201 in transport context, after the attempt, and per-recipient. The latter type
1202 is per host attempted. The event data is the error message, and the errno
1203 information encodes the lookup type (A vs. MX) used for the (first) host,
1204 and the trailing two digits of the smtp 4xx response.
1206 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1207 to write to mainlog (or rejectlog, paniclog) in the window between file
1208 creation and permissions/ownership being changed. Particularly affects
1209 installations where exicyclog is run as root, rather than exim user;
1210 result is that the running daemon panics and dies.
1212 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1214 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1215 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1216 "pri" and "weight". Note that the previous implicit priority given by the
1217 list order is no longer honoured.
1219 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1220 for DKIM processing.
1222 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1223 by defining SUPPORT_SOCKS.
1225 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1226 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1227 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1228 variables are renamed to proxy_{local,external}_{address,port}.
1230 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1231 for a build by defining SUPPORT_I18N
1233 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1234 of the query string, and make ${quote_redis:} do that quoting.
1236 JH/29 Move Events support from Experimental to mainline, enabled by default
1237 and removable for a build by defining DISABLE_EVENT.
1239 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1241 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1242 cached by the daemon.
1244 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1245 by defining LOOKUP_REDIS. The libhiredis library is required.
1247 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1248 keys are given for lookup.
1250 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1251 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1252 only supported when built with TLS support. The PolarSSL SHA routines
1253 are still used when the TLS library is too old for convenient support.
1255 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1256 openssl_options), for security. OpenSSL forces this from version 1.1.0
1257 server-side so match that on older versions.
1259 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1260 allocation for $value could be released as the expansion processing
1261 concluded, but leaving the global pointer active for it.
1263 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1264 and to use the domains and local_parts ACL conditions.
1266 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1267 incorrectly not doubled on cutthrough transmission, hence seen as a
1268 body-termination at the receiving system - resulting in truncated mails.
1269 Commonly the sender saw a TCP-level error, and retransmitted the message
1270 via the normal store-and-forward channel. This could result in duplicates
1271 received - but deduplicating mailstores were liable to retain only the
1272 initial truncated version.
1274 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1276 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1278 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1279 we're in there, support oversigning also; bug 1309.
1281 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1283 HS/04 Add support for keep_environment and add_environment options.
1285 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1286 either intentional arithmetic overflow during PRNG, or testing config-
1289 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1290 delivery resulted in actual delivery. Cancel cutthrough before DATA
1293 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1294 rejects a recipient: pass the reject to the originator.
1296 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1297 Many were false-positives and ignorable, but it's worth fixing the
1300 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1301 for the new environment-manipulation done at startup. Move the routines
1302 from being local to tls.c to being global via the os.c file.
1304 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1305 an extract embedded as result-arg for a map, the first arg for extract
1306 is unavailable so we cannot tell if this is a numbered or keyed
1307 extraction. Accept either.
1313 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1316 JH/02 The smtp transport option "multi_domain" is now expanded.
1318 JH/03 The smtp transport now requests PRDR by default, if the server offers
1321 JH/04 Certificate name checking on server certificates, when exim is a client,
1322 is now done by default. The transport option tls_verify_cert_hostnames
1323 can be used to disable this per-host. The build option
1324 EXPERIMENTAL_CERTNAMES is withdrawn.
1326 JH/05 The value of the tls_verify_certificates smtp transport and main options
1327 default to the word "system" to access the system default CA bundle.
1328 For GnuTLS, only version 3.0.20 or later.
1330 JH/06 Verification of the server certificate for a TLS connection is now tried
1331 (but not required) by default. The verification status is now logged by
1332 default, for both outbound TLS and client-certificate supplying inbound
1335 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1338 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1339 Status Notification (bounce) messages are now MIME format per RFC 3464.
1340 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1341 under the control of the dsn_advertise_hosts option, and routers may
1342 have a dsn_lasthop option.
1344 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1345 default, modifiable by a malware= option. The list separator for
1346 the options can now be changed in the usual way. Bug 68.
1348 JH/10 The smtp_receive_timeout main option is now expanded before use.
1350 JH/11 The incoming_interface log option now also enables logging of the
1351 local interface on delivery outgoing connections.
1353 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1354 if the interface and destination host and port all match.
1356 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1359 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1360 Patch from Andrew Lewis.
1362 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1363 now supports optional time-restrictions, weighting, and priority
1364 modifiers per server. Patch originally by <rommer@active.by>.
1366 JH/16 The spamd_address main option now supports a mixed list of local
1367 and remote servers. Remote servers can be IPv6 addresses, and
1368 specify a port-range.
1370 JH/17 Bug 68: The spamd_address main option now supports an optional
1371 timeout value per server.
1373 JH/18 Bug 1581: Router and transport options headers_add/remove can
1374 now have the list separator specified.
1376 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1379 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1382 JH/21 Support for the A6 type of dns record is withdrawn.
1384 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1385 rather than the verbs used.
1387 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1388 from 255 to 1024 chars.
1390 JH/24 Verification callouts now attempt to use TLS by default.
1392 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1393 are generic router options now. The defaults didn't change.
1395 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1396 Original patch from Alexander Shikoff, worked over by JH.
1398 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1399 files if ZCAT_COMMAND is not executable.
1401 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1403 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1405 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1406 Normally benign, it bites when the pair was led to by a CNAME;
1407 modern usage is to not canonicalize the domain to a CNAME target
1408 (and we were inconsistent anyway for A-only vs AAAA+A).
1410 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1412 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1413 when evaluating $sender_host_dnssec.
1415 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1416 $sender_helo_dnssec variable.
1418 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1420 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1422 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1424 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1425 documented as working, but never had. Support all but $spam_report.
1427 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1428 added for tls authenticator.
1430 HS/03 Add perl_taintmode main config option
1436 TL/01 When running the test suite, the README says that variables such as
1437 no_msglog_check are global and can be placed anywhere in a specific
1438 test's script, however it was observed that placement needed to be near
1439 the beginning for it to behave that way. Changed the runtest perl
1440 script to read through the entire script once to detect and set these
1441 variables, reset to the beginning of the script, and then run through
1442 the script parsing/test process like normal.
1444 TL/02 The BSD's have an arc4random API. One of the functions to induce
1445 adding randomness was arc4random_stir(), but it has been removed in
1446 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1447 function when detected.
1449 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1450 cause callback expansion.
1452 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1453 syntax errors in an expansion can be treated as a string instead of
1454 logging or causing an error, due to the internal use of bool_lax
1455 instead of bool when processing it.
1457 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1458 server certificates when making smtp deliveries.
1460 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1462 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1464 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1466 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1467 Merged patch from Sebastian Wiedenroth.
1469 JH/05 Fix results-pipe from transport process. Several recipients, combined
1470 with certificate use, exposed issues where response data items split
1471 over buffer boundaries were not parsed properly. This eventually
1472 resulted in duplicates being sent. This issue only became common enough
1473 to notice due to the introduction of connection certificate information,
1474 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1476 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1477 size buffer was used, resulting in syntax errors when an expansion
1480 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1481 version 3.3.6 or later.
1483 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1484 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1485 both become "event_action", the variables become $event_name, $event_data
1486 and $event_defer_errno. There is a new variable $verify_mode, usable in
1487 routers, transports and related events. The tls:cert event is now also
1488 raised for inbound connections, if the main configuration event_action
1491 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1492 early OCSP support, but no stapling (appears to be less than 1.0.0).
1494 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1495 server certificate names available under the smtp transport option
1496 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1499 JH/10 Time-related extraction expansions from certificates now use the main
1500 option "timezone" setting for output formatting, and are consistent
1501 between OpenSSL and GnuTLS compilations. Bug 1541.
1503 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1504 encoded parameter in the incoming message. Bug 1558.
1506 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1507 include certificate info, eximon was claiming there were spoolfile
1510 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1512 JH/14 Log delivery-related information more consistently, using the sequence
1513 "H=<name> [<ip>]" wherever possible.
1515 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1516 are problematic for Debian distribution, omit them from the release
1519 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1521 JH/16 Fix string representation of time values on 64bit time_t architectures.
1524 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1525 output list separator was used.
1530 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1531 checkers that were complaining about end of non-void function with no
1534 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1535 This was a regression introduced in 4.83 by another bugfix.
1537 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1539 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1540 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1546 TF/01 Correctly close the server side of TLS when forking for delivery.
1548 When a message was received over SMTP with TLS, Exim failed to clear up
1549 the incoming connection properly after forking off the child process to
1550 deliver the message. In some situations the subsequent outgoing
1551 delivery connection happened to have the same fd number as the incoming
1552 connection previously had. Exim would try to use TLS and fail, logging
1553 a "Bad file descriptor" error.
1555 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1556 utilities have not been installed.
1558 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1559 temporary space as the ACL may create new global variables.
1561 TL/01 LDAP support uses per connection or global context settings, depending
1562 upon the detected version of the libraries at build time.
1564 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1565 to extract and use the src ip:port in logging and expansions as if it
1566 were a direct connection from the outside internet. PPv2 support was
1567 updated based on HAProxy spec change in May 2014.
1569 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1571 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1572 Properly escape header and check for NULL return.
1574 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1577 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1579 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1580 characters in header names, implemented as a verify condition.
1581 Contributed by Michael Fischer v. Mollard.
1583 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1584 results permerror and temperror. Previous values are deprecated but
1585 still accepted. In a future release, err_perm and err_temp will be
1586 completely removed, which will be a backward incompatibility if the
1587 ACL tests for either of these two old results. Patch contributed by
1588 user bes-internal on the mailing list.
1590 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1592 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1593 selectors, in both main and reject logs.
1595 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1598 JH/07 Add malware type "sock" for talking to simple daemon.
1600 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1602 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1603 routers/transports under cutthrough routing.
1605 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1606 numbers. Touch up "bool" conditional to keep the same definition.
1608 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1610 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1612 JH/12 Expand items in router/transport headers_add or headers_remove lists
1613 individually rather than the list as a whole. Bug 1452.
1615 Required for reasonable handling of multiple headers_ options when
1616 they may be empty; requires that headers_remove items with embedded
1617 colons must have them doubled (or the list-separator changed).
1619 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1620 view the policy declared in the DMARC record. Currently, $dmarc_status
1621 is a combined value of both the record presence and the result of the
1624 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1626 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1627 dnslookup router and the smtp transport (applying to the forward
1630 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1631 of ldap servers used for a specific lookup. Patch provided by Heiko
1634 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1635 New variable $lookup_dnssec_authenticated for observability.
1637 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1638 Patch submitted by Lars Timman.
1640 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1642 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1643 Requires trusted mode and valid format message id, aborts otherwise.
1644 Patch contributed by Heiko Schlichting.
1646 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1647 certextract with support for various fields. Bug 1358.
1649 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1650 is requested by default, modifiable by smtp transport option
1653 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1654 operate on certificate variables to give certificate fingerprints
1655 Also new ${sha256:cert_variable}.
1657 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1659 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1660 Christian Aistleitner.
1662 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1664 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1665 file. Patch from Wolfgang Breyha.
1667 JH/25 Expand the coverage of the delivery $host and $host_address to
1668 client authenticators run in verify callout. Bug 1476.
1670 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1671 align with daemon_smtp_ports. Bug 72.
1673 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1674 support and error reporting did not work properly.
1676 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1677 and is readable. Patch from Andrew Colin Kissa.
1679 TL/14 Enhance documentation of ${run expansion and how it parses the
1680 commandline after expansion, particularly in the case when an
1681 unquoted variable expansion results in an empty value.
1683 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1685 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1686 by renaming away from it. Addresses GH issue 15, reported by
1689 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1691 TL/15 SECURITY: prevent double expansion in math comparison functions
1692 (can expand unsanitized data). Not remotely exploitable.
1699 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1701 PP/02 Make -n do something, by making it not do something.
1702 When combined with -bP, the name of an option is not output.
1704 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1707 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1708 $sender_host_name and config options to manage this, and basic check
1711 PP/05 DSCP support for outbound connections and control modifier for inbound.
1713 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1714 (Only plugin which currently uses this is kerberos4, which nobody should
1715 be using, but we should make it available and other future plugins might
1716 conceivably use it, even though it would break NAT; stuff *should* be
1717 using channel bindings instead).
1719 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1720 name; added for Sendmail compatibility; requires admin caller.
1721 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1722 just ignore it); requires trusted caller.
1723 Also parse but ignore: -Ac -Am -X<logfile>
1726 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1728 TL/02 Add +smtp_confirmation as a default logging option.
1730 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1731 Patch by Magnus Holmgren from 2007-02-20.
1733 TL/04 Bugzilla 1281 - Spec typo.
1734 Bugzilla 1283 - Spec typo.
1735 Bugzilla 1290 - Spec grammar fixes.
1737 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1739 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1741 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1742 mailing list by by Dmitry Isaikin.
1744 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1746 JH/02 Support "G" suffix to numbers in ${if comparisons.
1748 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1750 NM/01 Bugzilla 1197 - Spec typo
1751 Bugzilla 1196 - Spec examples corrections
1753 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1755 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1756 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1759 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1760 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1762 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1763 "acl {{name}{arg}...}", and optional args on acl condition
1766 JH/05 Permit multiple router/transport headers_add/remove lines.
1768 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1770 JH/07 Avoid using a waiting database for a single-message-only transport.
1771 Performance patch from Paul Fisher. Bugzilla 1262.
1773 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1776 JH/09 Add $headers_added variable, with content from use of ACL modifier
1777 add_header (but not yet added to the message). Bugzilla 199.
1779 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1780 Pulled from Bugzilla 817 by Wolfgang Breyha.
1782 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1784 (nb: this is the same fix as in Exim 4.80.1)
1786 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1789 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1792 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1794 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1795 advertise SMTP AUTH mechanism to us, instead of a generic
1796 protocol violation error. Also, make Exim more robust to bad
1797 data from the Dovecot auth socket.
1799 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1801 When a queue runner is handling a message, Exim first routes the
1802 recipient addresses, during which it prunes them based on the retry
1803 hints database. After that it attempts to deliver the message to
1804 any remaining recipients. It then updates the hints database using
1807 So if a recipient address works intermittently, it can get repeatedly
1808 deferred at routing time. The retry hints record remains fresh so the
1809 address never reaches the final cutoff time.
1811 This is a fairly common occurrence when a user is bumping up against
1812 their storage quota. Exim had some logic in its local delivery code
1813 to deal with this. However it did not apply to per-recipient defers
1814 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1816 This change adds a proper retry rule check during routing so that the
1817 final cutoff time is checked against the message's age. We only do
1818 this check if there is an address retry record and there is not a
1819 domain retry record; this implies that previous attempts to handle
1820 the address had the retry_use_local_parts option turned on. We use
1821 this as an approximation for the destination being like a local
1822 delivery, as in LMTP.
1824 I suspect this new check makes the old local delivery cutoff check
1825 redundant, but I have not verified this so I left the code in place.
1827 TF/02 Correct gecos expansion when From: is a prefix of the username.
1829 Test 0254 submits a message to Exim with the header
1833 When I ran the test suite under the user fanf2, Exim expanded
1834 the header to contain my full name, whereas it should have added
1835 a Resent-Sender: header. It erroneously treats any prefix of the
1836 username as equal to the username.
1838 This change corrects that bug.
1840 GF/01 DCC debug and logging tidyup
1841 Error conditions log to paniclog rather than rejectlog.
1842 Debug lines prefixed by "DCC: " to remove any ambiguity.
1844 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1846 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1847 Bug spotted by Jeremy Harris; was flawed since initial commit.
1848 Would have resulted in OCSP responses post-SNI triggering an Exim
1849 NULL dereference and crash.
1851 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1853 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1854 Bug detection, analysis and fix by Samuel Thibault.
1855 Bugzilla 1331, Debian bug #698092.
1857 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1859 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1860 Server implementation by Todd Lyons, client by JH.
1861 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1862 config variable "prdr_enable" controls whether the server
1863 advertises the facility. If the client requests PRDR a new
1864 acl_data_smtp_prdr ACL is called once for each recipient, after
1865 the body content is received and before the acl_smtp_data ACL.
1866 The client is controlled by both of: a hosts_try_prdr option
1867 on the smtp transport, and the server advertisement.
1868 Default client logging of deliveries and rejections involving
1869 PRDR are flagged with the string "PRDR".
1871 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1872 fclose(). Diagnosis by Todd Lyons.
1874 PP/17 Update configure.default to handle IPv6 localhost better.
1875 Patch by Alain Williams (plus minor tweaks).
1878 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1879 This is now consistent with GnuTLS, and is now documented: the
1880 previous undocumented portable approach to treating the option as
1881 unset was to force an expansion failure. That still works, and
1882 an empty string is now equivalent.
1884 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1885 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1886 not performing validation itself.
1888 PP/20 Added force_command boolean option to pipe transport.
1889 Patch from Nick Koston, of cPanel Inc.
1891 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1894 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1896 PP/21 Fix eximon continuous updating with timestamped log-files.
1897 Broken in a format-string cleanup in 4.80, missed when I repaired the
1898 other false fix of the same issue.
1899 Report and fix from Heiko Schlichting.
1902 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1903 Report from Prashanth Katuri.
1905 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1906 It's SecureTransport, so affects any MacOS clients which use the
1907 system-integrated TLS libraries, including email clients.
1909 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1910 using a MIME ACL for non-SMTP local injection.
1911 Report and assistance in diagnosis by Warren Baker.
1913 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1915 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1917 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1918 last id that failed so it may be referenced in subsequent ACL's.
1920 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1923 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1924 ldap library initialization, allowing self-signed CA's to be
1925 used. Also properly sets require_cert option later in code by
1926 using NULL (global ldap config) instead of ldap handle (per
1927 session). Bug diagnosis and testing by alxgomz.
1929 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1930 the src/util/ subdirectory.
1932 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1933 renamed to Transport Post Delivery Action by Jeremy Harris, as
1936 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1937 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1938 redis_servers = needs to be configured which will be used by the redis
1939 lookup. Patch from Warren Baker, of The Packet Hub.
1941 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1943 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1944 hostname or reverse DNS when processing a host list. Used suggestions
1945 from multiple comments on this bug.
1947 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1949 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1950 Missed a few lines, added it to make the runtest require no keyboard
1953 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1954 contains upper case chars. Make router use caseful_local_part.
1956 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1957 support when GnuTLS has been built with p11-kit.
1963 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1965 This, or similar/improved, will also be change PP/11 of 4.82.
1971 PP/01 Handle short writes when writing local log-files.
1972 In practice, only affects FreeBSD (8 onwards).
1973 Bugzilla 1053, with thanks to Dmitry Isaikin.
1975 NM/01 Bugzilla 949 - Documentation tweak
1977 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1980 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1982 PP/02 Implemented gsasl authenticator.
1984 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1986 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1987 `pkg-config foo` for cflags/libs.
1989 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1990 with rest of GSASL and with heimdal_gssapi.
1992 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1993 `pkg-config foo` for cflags/libs for the TLS implementation.
1995 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1996 properties get this fed in as external SSF. A number of robustness
1997 and debugging improvements to the cyrus_sasl authenticator.
1999 PP/08 cyrus_sasl server now expands the server_realm option.
2001 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2002 Patch by Jeremy Harris.
2004 PP/10 Added dbmjz lookup type.
2006 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2008 PP/12 MAIL args handles TAB as well as SP, for better interop with
2009 non-compliant senders.
2010 Analysis and variant patch by Todd Lyons.
2012 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2013 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2014 Patch from Dirk Mueller <dmueller@suse.com>
2016 PP/13 tls_peerdn now print-escaped for spool files.
2017 Observed some $tls_peerdn in wild which contained \n, which resulted
2018 in spool file corruption.
2020 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2021 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2022 or write after TLS renegotiation, which otherwise led to messages
2025 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2026 as a tracking header (ie: a signed header comes before the signature).
2027 Patch from Wolfgang Breyha.
2029 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2030 comma-sep list; embedded commas doubled.
2032 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2034 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2036 Report and patch from Dmitry Banschikov.
2038 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2039 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2040 failures. We appear to now support TLS1.1+ with Exim.
2042 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2043 lets Exim select keys and certificates based upon TLS SNI from client.
2044 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2045 before an outbound SMTP session. New log_selector, +tls_sni.
2047 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2048 NULL dereference. Report and patch from Alun Jones.
2050 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2051 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2052 Not seeing resolver debug output on NetBSD, but suspect this is a
2053 resolver implementation change.
2055 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2056 Left warnings. Added "eximon gdb" invocation mode.
2058 PP/21 Defaulting "accept_8bitmime" to true, not false.
2060 PP/22 Added -bw for inetd wait mode support.
2062 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2063 locate the relevant includes and libraries. Made this the default.
2065 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2066 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2068 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2069 This may cause build issues on older platforms.
2071 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2072 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2073 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2074 Added SNI support via GnuTLS too.
2075 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2077 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2079 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2080 Applied second patch from Janne, implementing suggestion to default
2081 multiple-strings-in-record handling to match SPF spec.
2083 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2085 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2086 read-only, out of scope).
2087 Patch from Wolfgang Breyha, report from Stuart Northfield.
2089 PP/29 Fix three issues highlighted by clang analyser static analysis.
2090 Only crash-plausible issue would require the Cambridge-specific
2091 iplookup router and a misconfiguration.
2092 Report from Marcin Mirosław.
2094 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2096 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2097 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2098 As part of this, removing so much warning spew let me fix some minor
2099 real issues in debug logging.
2101 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2102 assignment on my part. Fixed.
2104 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2105 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2106 Janne Snabb (who went above and beyond: thank you).
2108 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2109 string otherwise requires a connection and a bunch more work and it's
2110 relatively easy to get wrong. Should also expose TLS library linkage
2113 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2114 64-bit ${eval} (JH/03).
2116 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2117 GNU libc to support some of the 64-bit stuff, should not lead to
2118 conflicts. Defined before os.h is pulled in, so if a given platform
2119 needs to override this, it can.
2121 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2122 protection layer was required, which is not implemented.
2123 Bugzilla 1254, patch from Wolfgang Breyha.
2125 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2126 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2127 tls_dhparam take prime identifiers. Also unbreak combination of
2128 OpenSSL+DH_params+TLSSNI.
2130 PP/39 Disable SSLv2 by default in OpenSSL support.
2136 PP/01 Solaris build fix for Oracle's LDAP libraries.
2137 Bugzilla 1109, patch from Stephen Usher.
2139 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2141 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2144 TF/02 Fix a couple more cases where we did not log the error message
2145 when unlink() failed. See also change 4.74-TF/03.
2147 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2148 lock up or crash if it happened to be inside a call to libc when it
2149 got a SIGUSR1 from exiwhat.
2151 The SIGUSR1 handler appends the current process status to the process
2152 log which is later printed by exiwhat. It used to use the general
2153 purpose logging code to do this, but several functions it calls are
2154 not safe for signals.
2156 The new output code in the SIGUSR1 handler is specific to the process
2157 log, and simple enough that it's easy to inspect for signal safety.
2158 Removing some special cases also simplifies the general logging code.
2159 Removing the spurious timestamps from the process log simplifies
2162 TF/04 Improved ratelimit ACL condition.
2164 The /noupdate option has been deprecated in favour of /readonly which
2165 has clearer semantics. The /leaky, /strict, and /readonly update modes
2166 are mutually exclusive. The update mode is no longer included in the
2167 database key; it just determines when the database is updated. (This
2168 means that when you upgrade Exim will forget old rate measurements.)
2170 Exim now checks that the per_* options are used with an update mode that
2171 makes sense for the current ACL. For example, when Exim is processing a
2172 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2173 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2174 must specify per_mail/readonly. If you omit the update mode it defaults to
2175 /leaky where that makes sense (as before) or /readonly where required.
2177 The /noupdate option is now undocumented but still supported for
2178 backwards compatibility. It is equivalent to /readonly except that in
2179 ACLs where /readonly is required you may specify /leaky/noupdate or
2180 /strict/noupdate which are treated the same as /readonly.
2182 A useful new feature is the /count= option. This is a generalization
2183 of the per_byte option, so that you can measure the throughput of other
2184 aggregate values. For example, the per_byte option is now equivalent
2185 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2187 The per_rcpt option has been generalized using the /count= mechanism
2188 (though it's more complicated than the per_byte equivalence). When it is
2189 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2190 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2191 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2192 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2193 Note that using per_rcpt with a non-readonly update mode in more than
2194 one ACL will cause the recipients to be double-counted. (The per_mail
2195 and per_byte options don't have this problem.)
2197 The handling of very low rates has changed slightly. If the computed rate
2198 is less than the event's count (usually one) then this event is the first
2199 after a long gap. In this case the rate is set to the same as this event's
2200 count, so that the first message of a spam run is counted properly.
2202 The major new feature is a mechanism for counting the rate of unique
2203 events. The new per_addr option counts the number of different
2204 recipients that someone has sent messages to in the last time period. It
2205 behaves like per_rcpt if all the recipient addresses are different, but
2206 duplicate recipient addresses do not increase the measured rate. Like
2207 the /count= option this is a general mechanism, so the per_addr option
2208 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2209 example, measure the rate that a client uses different sender addresses
2210 with the options per_mail/unique=$sender_address. There are further
2211 details in the main documentation.
2213 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2215 TF/06 Removed a few PCRE remnants.
2217 TF/07 Automatically extract Exim's version number from tags in the git
2218 repository when doing development or release builds.
2220 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2221 Bugzilla 879. Patch from Paul Fisher.
2223 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2224 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2227 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2229 PP/05 Variable $av_failed, true if the AV scanner deferred.
2230 Bugzilla 1078. Patch from John Horne.
2232 PP/06 Stop make process more reliably on build failure.
2233 Bugzilla 1087. Patch from Heiko Schlittermann.
2235 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2236 Bugzilla 1089. Patch from Heiko Schlittermann.
2238 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2239 Bugzilla 1131. Patch from Holger Weiß.
2241 PP/09 Handle IPv6 addresses with SPF.
2242 Bugzilla 860. Patch from Wolfgang Breyha.
2244 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2246 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2249 PP/11 match_* no longer expand right-hand-side by default.
2250 New compile-time build option, EXPAND_LISTMATCH_RHS.
2251 New expansion conditions, "inlist", "inlisti".
2253 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2255 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2257 PP/14 fix log_write() format string regression from TF/03.
2258 Bugzilla 1152. Patch from Dmitry Isaikin.
2264 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2266 PP/02 Harmonised TLS library version reporting; only show if debugging.
2267 Layout now matches that introduced for other libraries in 4.74 PP/03.
2269 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2271 PP/04 New "dns_use_edns0" global option.
2273 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2276 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2277 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2279 TK/01 Updated PolarSSL code to 0.14.2.
2280 Bugzilla 1097. Patch from Andreas Metzler.
2282 PP/07 Catch divide-by-zero in ${eval:...}.
2283 Fixes bugzilla 1102.
2285 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2288 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2289 format-string attack -- SECURITY: remote arbitrary code execution.
2291 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2292 time unintentionally subject to list matching rules, letting the header
2293 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2294 arbitrary string expansion). This allowed for information disclosure.
2296 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2297 INT_MIN/-1 -- value coerced to INT_MAX.
2303 NM/01 Workaround for PCRE version dependency in version reporting
2306 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2307 This fixes portability to compilers other than gcc, notably
2308 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2310 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2311 makefiles for portability to HP-UX and POSIX correctness.
2313 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2314 Also via indented variable definition in the Makefile.
2315 (Debugging by Oliver Heesakkers).
2317 PP/02 Restore caching of spamd results with expanded spamd_address.
2318 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2320 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2321 Improves build reliability. Fix from: Frank Elsner
2323 NM/02 Fix wide character breakage in the rfc2047 coding
2324 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2326 NM/03 Allow underscore in dnslist lookups
2327 Fixes bug 1026. Patch from Graeme Fowler
2329 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2330 Code patches from Adam Ciarcinski of NetBSD.
2332 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2335 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2336 is logged, to avoid truncation. Patch from John Horne.
2338 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2339 Patch from Jakob Hirsch.
2341 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2342 SQL string expansion failure details.
2343 Patch from Andrey Oktyabrski.
2345 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2346 Patch from Simon Arlott.
2348 PP/09 New lookups functionality failed to compile on old gcc which rejects
2349 extern declarations in function scope.
2350 Patch from Oliver Fleischmann
2352 PP/10 Use sig_atomic_t for flags set from signal handlers.
2353 Check getgroups() return and improve debugging.
2354 Fixed developed for diagnosis in bug 927 (which turned out to be
2357 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2358 Patch from Mark Zealey.
2360 PP/12 Bugzilla 1056: Improved spamd server selection.
2361 Patch from Mark Zealey.
2363 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2364 Based on patch from Heiko Schlittermann.
2366 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2367 Patch from Uwe Doering, sign-off by Michael Haardt.
2369 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2370 variable declaration deep within a block. Bug and patch from
2373 PP/15 lookups-Makefile IRIX compatibility coercion.
2375 PP/16 Make DISABLE_DKIM build knob functional.
2377 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2378 Patch by Simon Arlott
2380 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2381 variable argument macros. Our copy now differs from upstream.
2387 TF/01 Failure to get a lock on a hints database can have serious
2388 consequences so log it to the panic log.
2390 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2391 controlled using the smtp_confirmation log selector.
2393 TF/03 Include the error message when we fail to unlink a spool file.
2395 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2396 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2397 for maintaining out-of-tree patches for some time.
2399 PP/01 Bugzilla 139: Documentation and portability issues.
2400 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2401 Handle per-OS dynamic-module compilation flags.
2403 PP/02 Let /dev/null have normal permissions.
2404 The 4.73 fixes were a little too stringent and complained about the
2405 permissions on /dev/null. Exempt it from some checks.
2406 Reported by Andreas M. Kirchwitz.
2408 PP/03 Report version information for many libraries, including
2409 Exim version information for dynamically loaded libraries. Created
2410 version.h, now support a version extension string for distributors
2411 who patch heavily. Dynamic module ABI change.
2413 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2414 privilege escalation vulnerability whereby the Exim run-time user
2415 can cause root to append content of the attacker's choosing to
2418 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2421 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2422 If dropping privileges for untrusted macros, we disabled normal logging
2423 on the basis that it would fail; for the Exim run-time user, this is not
2424 the case, and it resulted in successful deliveries going unlogged.
2425 Fixed. Reported by Andreas Metzler.
2431 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2432 only prepend for the Resent-* case. Fixes regression introduced in
2433 Exim 4.70 by NM/22 for Bugzilla 607.
2435 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2436 increasing numbers of administrators be bitten by this.
2438 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2440 PP/03 Bugzilla 994: added openssl_options main configuration option.
2442 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2444 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2446 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2448 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2449 without a peer certificate, leading to a segfault because of an
2450 assumption that peers always have certificates. Be a little more
2451 paranoid. Problem reported by Martin Tscholak.
2453 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2454 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2455 NB: ClamAV planning to remove STREAM in "middle of 2010".
2456 CL also introduces -bmalware, various -d+acl logging additions and
2457 more caution in buffer sizes.
2459 PP/09 Implemented reverse_ip expansion operator.
2461 PP/10 Bugzilla 937: provide a "debug" ACL control.
2463 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2465 PP/12 Bugzilla 973: Implement --version.
2467 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2469 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2471 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2473 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2474 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2475 ignore trailing whitespace.
2477 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2479 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2482 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2483 Notification from Dr Andrew Aitchison.
2485 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2486 ExtendedDetectionInfo response format.
2487 Notification from John Horne.
2489 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2492 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2493 XSL and documented dependency on system catalogs, with examples of how
2496 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2499 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2500 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2501 configuration file which is writeable by the Exim user or group.
2503 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2504 of configuration files to cover files specified with the -C option if
2505 they are going to be used with root privileges, not just the default
2508 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2509 option (effectively making it always true).
2511 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2512 files to be used while preserving root privileges.
2514 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2515 that rogue child processes cannot use them.
2517 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2518 run-time user, instead of root.
2520 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2521 Exim run-time user without dropping privileges.
2523 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2524 result string, instead of calling string_vformat() twice with the same
2527 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2528 for other users. Others should always drop root privileges if they use
2529 -C on the command line, even for a whitelisted configure file.
2531 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2533 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2539 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2540 $data_path, and $header_path variables; fixed documentation bugs and
2543 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2544 exipick to access non-standard spools, including the "frozen" queue
2547 NM/01 Bugzilla 965: Support mysql stored procedures.
2548 Patch from Alain Williams
2550 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2552 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2553 Patch from Andreas Metzler
2555 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2556 Patch from Kirill Miazine
2558 NM/05 Bugzilla 671: Added umask to procmail example.
2560 JJ/03 installed exipick 20100323.0, fixing doc bug
2562 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2563 directory. Notification and patch from Dan Rosenberg.
2565 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2567 TK/02 Improve log output when DKIM signing operation fails.
2569 MH/01 Treat the transport option dkim_domain as a colon separated
2570 list, not as a single string, and sign the message with each element,
2571 omitting multiple occurences of the same signer.
2573 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2574 Bugzilla 985, 986. Patch by Simon Arlott
2576 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2577 Patch by Simon Arlott
2579 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2580 MBX locking. Notification from Dan Rosenberg.
2586 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2588 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2590 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2592 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2594 NM/04 Bugzilla 915: Flag broken perl installation during build.
2600 TK/01 Added patch by Johannes Berg that expands the main option
2601 "spamd_address" if it starts with a dollar sign.
2603 TK/02 Write list of recipients to X-Envelope-Sender header when building
2604 the mbox-format spool file for content scanning (suggested by Jakob
2607 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2608 (http://www.dcc-servers.net/) support via dccifd. Activated by
2609 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2611 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2612 by Mark Daniel Reidel <mr@df.eu>.
2614 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2615 When building exim an external PCRE library is now needed -
2616 PCRE is a system library on the majority of modern systems.
2617 See entry on PCRE_LIBS in EDITME file.
2619 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2620 conversation. Added nologin parameter to request.
2621 Patch contributed by Kirill Miazine.
2623 TF/01 Do not log submission mode rewrites if they do not change the address.
2625 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2627 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2628 log files in place. Contributed by Roberto Lima.
2630 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2632 TF/03 Bugzilla 615: When checking the local_parts router precondition
2633 after a local_part_suffix or local_part_prefix option, Exim now
2634 does not use the address's named list lookup cache, since this
2635 contains cached lookups for the whole local part.
2637 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2638 Robert Millan. Documentation is in experimental-spec.txt.
2640 TF/04 Bugzilla 668: Fix parallel build (make -j).
2642 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2644 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2645 Patch provided by Jan Srzednicki.
2647 TF/05 Leading white space used to be stripped from $spam_report which
2648 wrecked the formatting. Now it is preserved.
2650 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2651 that they are available at delivery time.
2653 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2655 TF/08 TLS error reporting now respects the incoming_interface and
2656 incoming_port log selectors.
2658 TF/09 Produce a more useful error message if an SMTP transport's hosts
2659 setting expands to an empty string.
2661 NM/06 Bugzilla 744: EXPN did not work under TLS.
2662 Patch provided by Phil Pennock.
2664 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2665 Patch provided by Richard Godbee.
2667 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2668 acl_smtp_notquit, added index entry.
2670 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2671 Patch provided by Eugene Bujak.
2673 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2674 accept(). Patch provided by Maxim Dounin.
2676 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2677 Patch provided by Phil Pennock.
2679 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2681 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2682 Patch provided by Brad "anomie" Jorsch.
2684 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2685 Patch provided by Dean Brooks.
2687 TK/05 Add native DKIM support (does not depend on external libraries).
2689 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2690 Patch provided by Graeme Fowler.
2692 NM/16 Bugzilla 851: Documentation example syntax fix.
2694 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2696 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2699 NM/19 Bugzilla 745: TLS version reporting.
2700 Patch provided by Phil Pennock.
2702 NM/20 Bugzilla 167: bool: condition support.
2703 Patch provided by Phil Pennock.
2705 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2706 clients. Patch provided by Phil Pennock.
2708 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2709 Patch provided by Brad "anomie" Jorsch.
2711 NM/23 Bugzilla 687: Fix misparses in eximstats.
2712 Patch provided by Heiko Schlittermann.
2714 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2715 Patch provided by Heiko Schlittermann.
2717 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2718 plus update to original patch.
2720 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2722 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2723 Patch provided by David Brownlee.
2725 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2727 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2729 NM/30 Bugzilla 888: TLS documentation bugfixes.
2731 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2733 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2734 Unlike the original bugzilla I have changed all shell scripts in src tree.
2736 NM/33 Bugzilla 898: Transport filter timeout fix.
2737 Patch by Todd Rinaldo.
2739 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2740 Patch by Serge Demonchaux.
2742 NM/35 Bugzilla 39: Base64 decode bug fixes.
2743 Patch by Jakob Hirsch.
2745 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2747 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2749 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2751 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2757 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2758 ALT-N's libdkim that I have put here:
2759 http://duncanthrax.net/exim-experimental/
2761 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2762 were called 'true' and it seems that C99 defines that as a reserved
2763 keyword to be used with 'bool' variable types. That means you could
2764 not include C99-style headers which use bools without triggering
2765 build errors in sieve.c.
2767 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2768 as mailq or other aliases. Changed the --help handling significantly
2769 to do whats expected. exim_usage() emits usage/help information.
2771 SC/01 Added the -bylocaldomain option to eximstats.
2773 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2775 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2777 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2783 PH/01 Another patch from the Sieve maintainer.
2785 PH/02 When an IPv6 address is converted to a string for single-key lookup
2786 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2787 dots are used instead of colons so that keys in lsearch files need not
2788 contain colons. This was done some time before quoting was made available
2789 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2790 (notated using the quote facility) so as to distinguish them from IPv4
2791 keys. This meant that lookups for IP addresses in host lists did not work
2792 for iplsearch lookups.
2794 This has been fixed by arranging for IPv6 addresses to be expressed with
2795 colons if the lookup type is iplsearch. This is not incompatible, because
2796 previously such lookups could never work.
2798 The situation is now rather anomalous, since one *can* have colons in
2799 ordinary lsearch keys. However, making the change in all cases is
2800 incompatible and would probably break a number of configurations.
2802 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2805 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2806 conversion specification without a maximum field width, thereby enabling
2807 a rogue spamd server to cause a buffer overflow. While nobody in their
2808 right mind would setup Exim to query an untrusted spamd server, an
2809 attacker that gains access to a server running spamd could potentially
2810 exploit this vulnerability to run arbitrary code as the Exim user.
2812 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2813 $primary_hostname instead of what libspf2 thinks the hosts name is.
2815 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2816 a directory entry by the name of the lookup key. Previously, if a
2817 symlink pointed to a non-existing file or a file in a directory that
2818 Exim lacked permissions to read, a lookup for a key matching that
2819 symlink would fail. Now it is enough that a matching directory entry
2820 exists, symlink or not. (Bugzilla 503.)
2822 PH/03 The body_linecount and body_zerocount variables are now exported in the
2825 PH/04 Added the $dnslist_matched variable.
2827 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2828 This means they are set thereafter only if the connection becomes
2831 PH/06 Added the client_condition to authenticators so that some can be skipped
2832 by clients under certain conditions.
2834 PH/07 The error message for a badly-placed control=no_multiline_responses left
2835 "_responses" off the end of the name.
2837 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2839 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2840 (without spaces) instead of just copying the configuration text.
2842 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2844 PH/11 Added $max_received_linelength.
2846 PH/12 Added +ignore_defer and +include_defer to host lists.
2848 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2849 way in which PCRE > 7.0 is built.
2851 PH/14 Implemented queue_only_load_latch.
2853 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2854 MAIL command. The effect was to mangle the value on 64-bit systems.
2856 PH/16 Another patch from the Sieve maintainer.
2858 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2860 PH/18 If a system quota error occurred while trying to create the file for
2861 a maildir delivery, the message "Mailbox is full" was not appended to the
2862 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2863 only to a quota excession during the actual writing of the file.
2865 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2866 characters?) which causes problems in log lines. The DN values are now
2867 passed through string_printing() before being added to log lines.
2869 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2870 and InterBase are left for another time.)
2872 PH/21 Added message_body_newlines option.
2874 PH/22 Guard against possible overflow in moan_check_errorcopy().
2876 PH/23 POSIX allows open() to be a macro; guard against that.
2878 PH/24 If the recipient of an error message contained an @ in the local part
2879 (suitably quoted, of course), incorrect values were put in $domain and
2880 $local_part during the evaluation of errors_copy.
2886 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2887 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2890 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2891 issue a MAIL command.
2893 PH/02 In an ACL statement such as
2895 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2897 if a client was not listed at all, or was listed with a value other than
2898 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2899 the condition was not true (as it should be), so access was not denied.
2900 The bug was that the ! inversion was incorrectly passed on to the second
2901 item. This has been fixed.
2903 PH/03 Added additional dnslists conditions == and =& which are different from
2904 = and & when the dns lookup returns more than one IP address.
2906 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2907 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2909 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2910 FSYNC, which compiles an option called disable_fsync that allows for
2911 bypassing fsync(). The documentation is heavily laced with warnings.
2913 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2915 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2916 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2917 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2918 including adding "make clean"; (3) Added -fPIC when compiling the test
2919 dynamically loaded module, to get rid of a warning.
2921 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2922 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2923 = 0s. The bug is otherwise harmless.
2925 PH/07 There was a bug in the dovecot authenticator such that the value of
2926 $auth1 could be overwritten, and so not correctly preserved, after a
2927 successful authentication. This usually meant that the value preserved by
2928 the server_setid option was incorrect.
2930 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2932 PH/09 Installed PCRE release 7.0.
2934 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2935 run for batched SMTP input. It is now run at the start of every message
2936 in the batch. While fixing this I discovered that the process information
2937 (output by running exiwhat) was not always getting set for -bs and -bS
2938 input. This is fixed, and it now also says "batched" for BSMTP.
2940 PH/11 Added control=no_pipelining.
2942 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2943 patch, slightly modified), and move the expansion of helo_data till after
2944 the connection is made in the smtp transport (so it can use these
2947 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2949 PH/14 Added log_selector = +pid.
2951 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2953 PH/16 Add ${if forany and ${if forall.
2955 PH/17 Added dsn_from option to vary the From: line in DSNs.
2957 PH/18 Flush SMTP output before performing a callout, unless control =
2958 no_callout_flush is set.
2960 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2961 was true (the default) a successful delivery failed to delete the retry
2962 item, thus causing premature timeout of the address. The bug is now
2965 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2967 PH/21 Long custom messages for fakedefer and fakereject are now split up
2968 into multiline responses in the same way that messages for "deny" and
2969 other ACL rejections are.
2971 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2972 with slight modification.
2974 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2975 draft, changing the syntax and factoring some duplicate code".
2977 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2978 for deliveries of the second and subsequent messages over the same SMTP
2981 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2982 ${reduce, with only minor "tidies".
2984 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2986 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2987 expansion side effects.
2989 PH/27 When a message times out after an over-quota error from an Exim-imposed
2990 quota, the bounce message says "mailbox is full". This message was not
2991 being given when it was a system quota that was exceeded. It now should
2994 MH/03 Made $recipients available in local_scan(). local_scan() already has
2995 better access to the recipient list through recipients_list[], but
2996 $recipients can be useful in postmaster-provided expansion strings.
2998 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2999 in the case of a MAIL command with additional options following the
3000 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3001 were accidentally chopped off.
3003 PH/29 SMTP synchronization checks are implemented when a command is read -
3004 there is a check that no more input is waiting when there shouldn't be
3005 any. However, for some commands, a delay in an ACL can mean that it is
3006 some time before the response is written. In this time, more input might
3007 arrive, invalidly. So now there are extra checks after an ACL has run for
3008 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3009 pipelining has not been advertised.
3011 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3013 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3014 returned in the SMTP response when smtp_return_error_details was false.
3015 This has been fixed.
3017 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3018 instead of the C I/O that was originally supplied, because problems were
3019 reported on Solaris.
3021 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3022 Exim which did not show up earlier: it was assuming that a call to
3023 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3024 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3025 was a macro that became an assignment, so it seemed to work. This has
3026 changed to a proper function call with a void return, hence the compile
3027 error. Exim's code has been fixed.
3029 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3032 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3034 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3036 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3037 because it turns out to be too big or there is a timeout) there is no
3038 "Completed" line in the log. When some messages of this type were
3039 selected by exigrep, they were listed as "not completed". Others were
3040 picked up by some special patterns. I have improved the selection
3041 criteria to be more general.
3043 PH/38 The host_find_failed option in the manualroute router can now be set
3044 to "ignore", to completely ignore a host whose IP address cannot be
3045 found. If all hosts are ignored, the behaviour is controlled by the new
3046 host_all_ignored option.
3048 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3049 homing or because of multiple MX records with /mx) generated more than
3050 one IP address, and the following item turned out to be the local host,
3051 all the secondary addresses of the first item were incorrectly removed
3052 from the list, along with the local host and any following hosts (which
3053 is what is supposed to happen).
3055 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3056 whoever called Exim into the -H file. In the case of the daemon it was
3057 behaving confusingly. When first started, it used values for whoever
3058 started the daemon, but after a SIGHUP it used the Exim user (because it
3059 calls itself on a restart). I have changed the code so that it now always
3062 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3063 message are rejected with the same error (e.g. no authentication or bad
3064 sender address), and a DATA command is nevertheless sent (as can happen
3065 with PIPELINING or a stupid MUA), the error message that was given to the
3066 RCPT commands is included in the rejection of the DATA command. This is
3067 intended to be helpful for MUAs that show only the final error to their
3070 PH/42 Another patch from the Sieve maintainer.
3072 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3073 Eximstats - Fixed some broken HTML links and added missing column headers
3075 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3076 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3078 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3080 PH/43 Yet another patch from the Sieve maintainer.
3082 PH/44 I found a way to check for a TCP/IP connection going away before sending
3083 the response to the final '.' that terminates a message, but only in the
3084 case where the client has not sent further data following the '.'
3085 (unfortunately, this is allowed). However, in many cases there won't be
3086 any further data because there won't be any more messages to send. A call
3087 to select() can be used: if it shows that the input is "ready", there is
3088 either input waiting, or the socket has been closed. An attempt to read
3089 the next input character can distinguish the two cases. Previously, Exim
3090 would have sent an OK response which the client would never have see.
3091 This could lead to message repetition. This fix should cure that, at
3092 least in a lot of common cases.
3094 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3095 advertised in response to EHLO.
3101 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3102 fixed by 4.65/MH/01 (is this a record?) are fixed:
3104 (i) An empty string was always treated as zero by the numeric comparison
3105 operators. This behaviour has been restored.
3107 (ii) It is documented that the numeric comparison operators always treat
3108 their arguments as decimal numbers. This was broken in that numbers
3109 starting with 0 were being interpreted as octal.
3111 While fixing these problems I realized that there was another issue that
3112 hadn't been noticed. Values of message_size_limit (both the global option
3113 and the transport option) were treated as octal if they started with 0.
3114 The documentation was vague. These values are now always treated as
3115 decimal, and I will make that clear in the documentation.
3121 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3122 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3125 MH/01 Don't check that the operands of numeric comparison operators are
3126 integers when their expansion is in "skipping" mode (fixes bug
3127 introduced by 4.64-PH/07).
3129 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3130 child addresses, Exim now panics and dies. Previously, because the count
3131 is held in a short int, deliveries were likely to be lost. As such a
3132 large number of recipients for a single message is ridiculous
3133 (performance will be very, very poor), I have chosen to impose a limit
3134 rather than extend the field.
3140 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3141 leftover -K file (the existence of which was triggered by #402).
3142 While we were at it, introduced process PID as part of the -K
3143 filename. This should rule out race conditions when creating
3146 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3147 processing considerably. Previous code took too long for large mails,
3148 triggering a timeout which in turn triggers #401.
3150 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3151 in the DK code in transports.c. sendfile() is not really portable,
3152 hence the _LINUX specificness.
3154 TF/01 In the add_headers option to the mail command in an Exim filter,
3155 there was a bug that Exim would claim a syntax error in any
3156 header after the first one which had an odd number of characters
3159 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3160 callout verification, Exim cached a "reject" for the entire domain. This
3161 is correct for most verifications, but it is not correct for a recipient
3162 verification with use_sender or use_postmaster set, because in that case
3163 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3164 case of MAIL FROM:<> rejection from other early rejections (e.g.
3165 rejection of HELO). When verifying a recipient using a non-null MAIL
3166 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3167 Whatever the result of the callout, the value of the domain cache is
3168 left unchanged (for any other kind of callout, getting as far as trying
3169 RCPT means that the domain itself is ok).
3171 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3174 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3175 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3176 session, the daemon ignores ECONNECT errors and logs others; it now
3177 ignores EPIPE as well.
3179 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3180 (quoted-printable decoding).
3182 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3183 later the small subsequent patch to fix an introduced bug.
3185 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3187 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3189 PH/08 An error is now given if message_size_limit is specified negative.
3191 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3192 to be given (somewhat) arbitrary names.
3194 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3197 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3198 miscellaneous code fixes
3200 PH/10 Added the log_reject_target ACL modifier to specify where to log
3203 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3204 hostname. This is wrong, because it relates to the incoming message (and
3205 probably the interface on which it is arriving) and not to the outgoing
3206 callout (which could be using a different interface). This has been
3207 changed to use the value of the helo_data option from the smtp transport
3208 instead - this is what is used when a message is actually being sent. If
3209 there is no remote transport (possible with a router that sets up host
3210 addresses), $smtp_active_hostname is used.
3212 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3213 tweaks were necessary in order to get it to work (see also 21 below):
3214 (a) The code assumed that strncpy() returns a negative number on buffer
3215 overflow, which isn't the case. Replaced with Exim's string_format()
3217 (b) There were several signed/unsigned issues. I just did the minimum
3218 hacking in of casts. There is scope for a larger refactoring.
3219 (c) The code used strcasecmp() which is not a standard C function.
3220 Replaced with Exim's strcmpic() function.
3221 (d) The code set only $1; it now sets $auth1 as well.
3222 (e) A simple test gave the error "authentication client didn't specify
3223 service in request". It would seem that Dovecot has changed its
3224 interface. Fortunately there's a specification; I followed it and
3225 changed what the client sends and it appears to be working now.
3227 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3230 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3231 address A is aliased to B and C, where B exists and C does not. Without
3232 -v the output is "A verified" because verification stops after a
3233 successful redirection if more than one address is generated. However,
3234 with -v the child addresses are also verified. Exim was outputting "A
3235 failed to verify" and then showing the successful verification for C,
3236 with its parentage. It now outputs "B failed to verify", showing B's
3237 parentage before showing the successful verification of C.
3239 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3240 look up a TXT record in a specific list after matching in a combined
3243 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3244 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3245 they consult the DNS. I had assumed they would set it the way they
3246 wanted; and indeed my experiments on Linux seem to show that in some
3247 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3248 To be on the safe side, however, I have now made the interface to
3249 host_find_byname() similar to host_find_bydns(), with an argument
3250 containing the DNS resolver options. The host_find_byname() function now
3251 sets these options at its start, just as host_find_bydns() does. The smtp
3252 transport options dns_qualify_single and dns_search_parents are passed to
3253 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3254 of host_find_byname() use the default settings of RES_DEFNAMES
3255 (qualify_single) but not RES_DNSRCH (search_parents).
3257 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3258 spool_read_header() do less string testing, by means of a preliminary
3259 switch on the second character of optional "-foo" lines. (This is
3260 overdue, caused by the large number of possibilities that now exist.
3261 Originally there were few.) While I was there, I also converted the
3262 str(n)cmp tests so they don't re-test the leading "-" and the first
3263 character, in the hope this might squeeze out yet more improvement.
3265 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3266 flag allowing group syntax was set by the header_syntax check but not
3267 turned off, possible causing trouble later; (2) The flag was not being
3268 set at all for the header_verify test, causing "group"-style headers to
3269 be rejected. I have now set it in this case, and also caused header_
3270 verify to ignore an empty address taken from a group. While doing this, I
3271 came across some other cases where the code for allowing group syntax
3272 while scanning a header line wasn't quite right (mostly, not resetting
3273 the flag correctly in the right place). These bugs could have caused
3274 trouble for malformed header lines. I hope it is now all correct.
3276 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3277 with the "reply" argument non-NULL. The code, however (which originally
3278 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3279 but it didn't always do it. This confused somebody who was copying the
3280 code for some other use. I have removed all the tests.
3282 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3283 feature that was used to support insecure browsers during the U.S. crypto
3284 embargo. It requires special client support, and Exim is probably the
3285 only MTA that supported it -- and would never use it because real RSA is
3286 always available. This code has been removed, because it had the bad
3287 effect of slowing Exim down by computing (never used) parameters for the
3288 RSA_EXPORT functionality.
3290 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3291 authenticator to fail if there's a tab character in the incoming data
3292 (there should never be unless someone is messing about, as it's supposed
3293 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3294 if the connection is using TLS or if the remote IP is the same as the
3295 local IP, and the "valid-client-cert option" if a client certificate has
3298 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3299 authenticators. This can be used for authorization after authentication
3300 succeeds. (In the case of plaintext, it servers for both authentication
3303 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3304 if any retry times were supplied.
3306 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3307 connection, where there is no client IP address to check. In this
3308 situation, the verify now always succeeds.
3310 PH/25 Applied John Jetmore's -Mset patch.
3312 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3314 PH/27 In a string expansion for a processed (not raw) header when multiple
3315 headers of the same name were present, leading whitespace was being
3316 removed from all of them, but trailing whitespace was being removed only
3317 from the last one. Now trailing whitespace is removed from each header
3318 before concatenation. Completely empty headers in a concatenation (as
3319 before) are ignored.
3321 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3322 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3324 PH/29 [Removed. This was a change that I later backed out, and forgot to
3325 correct the ChangeLog entry (that I had efficiently created) before
3326 committing the later change.]
3328 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3329 address errors (4xx response to RCPT) over the same connection as other
3330 messages routed to the same hosts. Such deliveries are always "forced",
3331 so retry times are not inspected. This resulted in far too many retries
3332 for the affected addresses. The effect occurred only when there were more
3333 hosts than the hosts_max_try setting in the smtp transport when it had
3334 the 4xx errors. Those hosts that it had tried were not added to the list
3335 of hosts for which the message was waiting, so if all were tried, there
3336 was no problem. Two fixes have been applied:
3338 (i) If there are any address or message errors in an SMTP delivery, none
3339 of the hosts (tried or untried) are now added to the list of hosts
3340 for which the message is waiting, so the message should not be a
3341 candidate for sending over the same connection that was used for a
3342 successful delivery of some other message. This seems entirely
3343 reasonable: after all the message is NOT "waiting for some host".
3344 This is so "obvious" that I'm not sure why it wasn't done
3345 previously. Hope I haven't missed anything, but it can't do any
3346 harm, as the worst effect is to miss an optimization.
3348 (ii) If, despite (i), such a delivery is accidentally attempted, the
3349 routing retry time is respected, so at least it doesn't keep
3350 hammering the server.
3352 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3353 in ${readsocket because some servers need this prod.
3355 PH/32 Added some extra debug output when updating a wait-xxx database.
3357 PH/33 The hint "could be header name not terminated by colon", which has been
3358 given for certain expansion errors for a long time, was not being given
3359 for the ${if def:h_colon_omitted{... case.
3361 PH/34 The spec says: "With one important exception, whenever a domain list is
3362 being scanned, $domain contains the subject domain." There was at least
3363 one case where this was not true.
3365 PH/35 The error "getsockname() failed: connection reset by peer" was being
3366 written to the panic log as well as the main log, but it isn't really
3367 panic-worthy as it just means the connection died rather early on. I have
3368 removed the panic log writing for the ECONNRESET error when getsockname()
3371 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3372 runs only) independently of the message's sender address. This meant
3373 that, if the 4xx error was in fact related to the sender, a different
3374 message to the same recipient with a different sender could confuse
3375 things. In particular, this can happen when sending to a greylisting
3376 server, but other circumstances could also provoke similar problems.
3377 I have changed the default so that the retry time for these errors is now
3378 based a combination of the sender and recipient addresses. This change
3379 can be overridden by setting address_retry_include_sender=false in the
3382 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3383 remote server are returned as part of bounce messages. This was not
3384 happening for LMTP over a pipe (the lmtp transport), but now it is the
3385 same for both kinds of LMTP.
3387 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3388 in header lines that were in fact CNAMEs. This is no longer the case.
3390 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3391 and queue runs started by the daemon processed all messages. This has
3392 been fixed so that -R and -S can now usefully be given with -q<time>.
3394 PH/40 Import PCRE release 6.7 (fixes some bugs).
3396 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3398 PH/42 Give an error if -q is specified more than once.
3400 PH/43 Renamed the variables $interface_address and $interface_port as
3401 $received_ip_address and $received_port, to make it clear that these
3402 values apply to message reception, and not to the outgoing interface when
3403 a message is delivered. (The old names remain recognized, of course.)
3405 PH/44 There was no timeout on the connect() call when using a Unix domain
3406 socket in the ${readsocket expansion. There now is.
3408 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3409 be meaningful with "accept".
3411 SC/01 Eximstats V1.43
3412 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3414 SC/02 Eximstats V1.44
3415 Use a glob alias rather than an array ref in the generated
3416 parser. This improves both readability and performance.
3418 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3419 Collect SpamAssassin and rejection statistics.
3420 Don't display local sender or destination tables unless
3421 there is data to show.
3422 Added average volumes into the top table text output.
3424 SC/04 Eximstats V1.46
3425 Collect data on the number of addresses (recipients)
3426 as well as the number of messages.
3428 SC/05 Eximstats V1.47
3429 Added 'Message too big' to the list of mail rejection
3430 reasons (thanks to Marco Gaiarin).
3432 SC/06 Eximstats V1.48
3433 Mainlog lines which have GMT offsets and are too short to
3434 have a flag are now skipped.
3436 SC/07 Eximstats V1.49 (Alain Williams)
3437 Added the -emptyok flag.
3439 SC/08 Eximstats V1.50
3440 Fixes for obtaining the IP address from reject messages.
3442 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3443 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3444 whitespace changes from 4.64-PH/27
3446 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3449 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3450 are found, allow negative numbers in numeric criteria)
3452 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3454 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3455 to match changes made in 4.64-PH/43
3457 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3459 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3460 "domain" is actually an IP address, and force a failure. This locks out
3461 those revolvers/nameservers that support "A-for-A" lookups, in
3462 contravention of the specifications.
3464 PH/48 When a host name was looked up from an IP address, and the subsequent
3465 forward lookup of the name timed out, the host name was left in
3466 $sender_host_name, contrary to the specification.
3468 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3469 restricted to single-key lookups, Exim was not diagnosing an error if
3470 * or *@ was used with a query-style lookup.
3472 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3474 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3475 long ago, but noone interested enough thought of it. Let's just say that
3476 the "1.1" means that there are some new functions that weren't there at
3477 some point in the past.
3479 PH/51 Error processing for expansion failure of helo_data from an smtp
3480 transport during callout processing was broken.
3482 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3483 tested/used via the -bh/-bhc/-bs options.
3485 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3486 bug, fixed in subsequent PCRE releases).
3488 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3489 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3491 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3497 SC/01 Use a glob alias rather than an array ref in eximstats generated
3498 parser. This improves both readability and performance.
3500 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3501 Don't display local sender or destination tables in eximstats unless
3502 there is data to show.
3503 Added average volumes into the eximstats top table text output.
3505 SC/03 Collect data on the number of addresses (recipients) as well
3506 as the number of messages in eximstats.
3508 TF/01 Correct an error in the documentation for the redirect router. Exim
3509 does (usually) call initgroups() when daemonizing.
3511 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3512 with consistent privilege compared to when running as a daemon.
3514 TF/03 Note in the spec that $authenticated_id is not set for local
3515 submissions from trusted users.
3517 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3518 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3520 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3521 by adding some example configuration directives to the default
3522 configuration file. A little bit of work is required to uncomment the
3523 directives and define how usernames and passwords are checked, but
3524 there is now a framework to start from.
3526 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3527 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3528 without this. I don't know how relevant this is to other LDAP libraries.
3530 PH/02 Add the verb name to the "unknown ACL verb" error.
3532 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3534 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3536 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3537 directory not expanded when it should be if an expanded home directory
3538 was set for the address (which is overridden by the transport).
3540 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3543 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3544 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3545 because it is too late at that time, and has no effect.
3547 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3548 security issue with \' (bugzilla #107). I could not use the
3549 PQescapeStringConn() function, because it needs a PGconn value as one of
3552 PH/08 When testing addresses using -bt, indicate those final addresses that
3553 are duplicates that would not cause an additional delivery. At least one
3554 person was confused, thinking that -bt output corresponded to deliveries.
3555 (Suppressing duplicates isn't a good idea as you lose the information
3556 about possibly different redirections that led to the duplicates.)
3558 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3559 systems where poll() doesn't work, in particular OS X.
3561 PH/10 Added more information to debugging output for retry time not reached.
3563 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3564 operations in malware.c.
3566 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3569 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3570 syslog_duplication set false, log lines that would normally be written
3571 both the the main log and to the reject log were not written to syslog at
3574 PH/14 In the default configuration, change the use of "message" in ACL warn
3575 statements to "add_header".
3577 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3578 not followed by a command (e.g. "seen endif").
3580 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3581 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3584 PH/17 Added extra conditions to the default value of delay_warning_condition
3588 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3589 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3590 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3593 The Auto-Submitted: and various List- headers are standardised, whereas I
3594 don't think Precedence: ever was.
3596 PH/18 Refactored debugging code in route_finduser() to show more information,
3597 in particular, the error code if getpwnam() issues one.
3599 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3600 This is apparently needed in addition to the PH/07 change above to avoid
3601 any possible encoding problems.
3603 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3604 but not after initializing Perl.
3606 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3607 output them only if debugging. By default they are written stderr,
3608 apparently, which is not desirable.
3610 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3613 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3616 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3618 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3619 authenticated or an ident call has been made. Suppress the default
3620 values for $authenticated_id and $authenticated_sender (but permit -oMai
3621 and -oMas) when testing with -bh.
3623 PH/24 Re-jigged the order of the tests in the default configuration so that the
3624 tests for valid domains and recipients precede the DNS black list and CSA
3625 tests, on the grounds that those ones are more expensive.
3627 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3628 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3629 This bug exists in every version of Exim that I still have, right back to
3632 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3633 However, an attempt to turn on case-sensitivity in a regex key by
3634 including (?-i) didn't work because the subject string was already
3635 lowercased, and the effects were non-intuitive. It turns out that a
3636 one-line patch can be used to allow (?-i) to work as expected.
3642 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3643 other effects) broke the use of negated acl sub-conditions.
3645 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3648 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3649 "Deny" causes Exim to reject the incoming connection with a 554 error.
3650 Unfortunately, if there is a major crisis, such as a disk failure,
3651 tcp-wrappers gives "deny", whereas what one would like would be some
3652 kind of temporary error. A kludge has been added to help with this.
3653 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3654 554 error is used if errno is still zero or contains ENOENT (which occurs
3655 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3658 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3660 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3661 errors. Otherwise a message that provokes a temporary error (when other
3662 messages do not) can cause a whole host to time out.
3664 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3665 addresses were routed directly to files or pipes from a redirect router.
3666 File deliveries just didn't batch; pipe deliveries might have suffered
3669 PH/06 A failure to get a lock for a hints database would erroneously always say
3670 "Failed to get write lock", even when it was really a read lock.
3672 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3673 of 0600. This has been changed to use the value of the lockfile_mode
3674 option (which defaults to 0600).
3676 PH/08 Applied small patch from the Sieve maintainer.
3678 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3679 folder from quota calculations, a direct delivery into this folder messed
3680 up the contents of the maildirsize file. This was because the regex was
3681 used only to exclude .Trash (or whatever) when the size of the mailbox
3682 was calculated. There was no check that a delivery was happening into an
3683 excluded directory. This bug has been fixed by ignoring all quota
3684 processing for deliveries into excluded directories.
3686 PH/10 Added the maildirfolder_create_regex option to appendfile.
3692 PH/01 The code for finding all the local interface addresses on a FreeBSD
3693 system running IPv6 was broken. This may well have applied to all BSD
3694 systems, as well as to others that have similar system calls. The broken
3695 code found IPv4 interfaces correctly, but gave incorrect values for the
3696 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3697 that it would not match correctly against @[] and not recognize the IPv6
3700 PH/02 The ipliteral router was not recognizing addresses of the form user@
3701 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3703 PH/03 Added disable_ipv6.
3705 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3706 decoded form, because it is most often used to construct To: headers
3707 lines in autoreplies, and the decoded form may well be syntactically
3708 invalid. However, $reply_address has leading white space removed, and all
3709 newlines turned into spaces so that the autoreply transport does not
3712 PH/05 If group was specified without a user on a router, and no group or user
3713 was specified on a transport, the group from the router was ignored.
3715 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3716 for visible compile-time settings that can be used to change these
3717 numbers, for those that want even more. Backwards compatibility with old
3718 spool files has been maintained. However, going back to a previous Exim
3719 release will lost any variables that are in spool files.
3721 PH/07 Two small changes when running in the test harness: increase delay when
3722 passing a TCP/IP connection to a new process, in case the original
3723 process has to generate a bounce, and remove special handling of
3724 127.0.0.2 (sic), which is no longer necessary.
3726 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3727 be the same on different OS.
3729 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3732 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3733 whether --show-vars was specified or not
3735 JJ/02 exipick: Added support for new ACL variable spool format introduced
3738 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3739 syntactically invalid From: or Reply-to: line, and a filter used this to
3740 generate an autoreply, and therefore failed to obtain an address for the
3741 autoreply, Exim could try to deliver to a non-existent relative file
3742 name, causing unrelated and misleading errors. What now happens is that
3743 it logs this as a hard delivery error, but does not attempt to create a
3746 PH/11 The exinext utility has a -C option for testing purposes, but although
3747 the given file was scanned by exinext itself; it wasn't being passed on
3748 when Exim was called.
3750 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3751 an end-of-file indication when reading a command response.
3753 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3754 compiled. In many other places in Exim, IPv6 addresses are always
3755 recognized, so I have changed this. It also means that IPv4 domain
3756 literals of the form [IPV4:n.n.n.n] are now always recognized.
3758 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3759 used if the router is not running as root, for example, when verifying at
3760 ACL time, or when using -bh. The debugging output from this situation was
3761 non-existent - all you got was a failure to exec. I have made two
3764 (a) Failures to set uid/gid, the current directory, or a process leader
3765 in a subprocess such as that created by queryprogram now generate
3766 suitable debugging output when -d is set.
3768 (b) The queryprogram router detects when it is not running as root,
3769 outputs suitable debugging information if -d is set, and then runs
3770 the subprocess without attempting to change uid/gid.
3772 PH/15 Minor change to Makefile for building test_host (undocumented testing
3775 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3776 additional section of a DNS packet that returns MX or SRV records.
3777 Instead, it always explicitly searches for A/AAAA records. This avoids
3778 major problems that occur when a DNS server includes only records of one
3779 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3780 fixed another bug: if SRV records were looked up and the corresponding
3781 address records were *not* found in the additional section, the port
3782 values from the SRV records were lost.
3784 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3785 using the correct key (the original address) when searching the retry
3786 rules in order to find which one to use for generating the retry hint.
3788 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3789 adding the default one. Similarly, if it contains a Reply-To: header, the
3790 errors_reply_to option, if set, is not used.
3792 PH/19 When calculating a retry time, Exim used to measure the "time since
3793 failure" by looking at the "first failed" field in the retry record. Now
3794 it does not use this if it is later than than the arrival time of the
3795 message. Instead it uses the arrival time. This makes for better
3796 behaviour in cases where some deliveries succeed, thus re-setting the
3797 "first failed" field. An example is a quota failure for a huge message
3798 when small messages continue to be delivered. Without this change, the
3799 "time since failure" will always be short, possible causing more frequent
3800 delivery attempts for the huge message than are intended.
3801 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3803 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3804 $1, $2, $3) because the numerical variables can be reset during some
3805 expansion items (e.g. "match"), thereby losing the authentication data.
3807 PH/21 Make -bV show the size of off_t variables so that the test suite can
3808 decide whether to run tests for quotas > 2G.
3810 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3811 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3812 filecount value is greater than 2G or if a quota value is greater than 2G
3813 on a system where the size of off_t is not greater than 4, a panic error
3816 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3817 never match. The debug and -bh output now contains an explicit error
3818 message indicating a malformed IPv4 address or mask.
3820 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3821 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3822 PH/23 above applies.
3824 PH/25 Do not write to syslog when running in the test harness. The only
3825 occasion when this arises is a failure to open the main or panic logs
3826 (for which there is an explicit test).
3828 PH/26 Added the /no_tell option to "control=freeze".
3830 PH/27 If a host name lookup failed very early in a connection, for example, if
3831 the IP address matched host_lookup and the reverse lookup yielded a name
3832 that did not have a forward lookup, an error message of the form "no IP
3833 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3834 could be logged. Now it outputs the IP address instead of "NULL".
3836 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3837 allows the sender and the authenticated sender to be set when
3838 submitting a message from within Exim. Since child_open_exim() is
3839 documented for local_scan(), the new function should be too.
3841 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3842 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3843 results in an empty string is now treated as unset.
3845 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3847 PH/31 Added sender_verify_fail logging option.
3849 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3850 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3851 tidied the source and removed it altogether.
3853 PH/33 When a queue run was abandoned because the load average was too high, a
3854 log line was always written; now it is written only if the queue_run log
3855 selector is set. In addition, the log line for abandonment now contains
3856 information about the queue run such as the pid. This is always present
3857 in "start" and "stop" lines but was omitted from the "abandon" line.
3859 PH/34 Omit spaces between a header name and the colon in the error message that
3860 is given when verify = headers_syntax fails (if there are lots of them,
3861 the message gets confusing).
3863 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3864 names, as there are now some PTR records that contain slashes. This check
3865 is only to protect against broken name servers that fall over on strange
3866 characters, so the fact that it applies to all lookups doesn't matter.
3868 PH/36 Now that the new test suite is complete, we can remove some of the
3869 special code in Exim that was needed for the old test suite. For example,
3870 sorting DNS records because real resolvers return them in an arbitrary
3871 order. The new test suite's fake resolver always returns records in the
3874 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3875 bounces) except when queue_only is set, to avoid logging races between
3876 the different processes.
3878 PH/38 Panic-die if .include specifies a non-absolute path.
3880 PH/39 A tweak to the "H" retry rule from its user.
3882 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3883 a label. They prevented compilation on older perls.
3885 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3886 a warning to be raised on newish perls.
3888 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3889 on queue. Changes to match documented behaviour of showing count of
3890 messages matching specified criteria.
3892 PH/40 Changed the default ident timeout from 30s to 5s.
3894 PH/41 Added support for the use of login_cap features, on those BSD systems
3895 that have them, for controlling the resources used by pipe deliveries.
3897 PH/42 The content-scanning code uses fopen() to create files in which to put
3898 message data. Previously it was not paying any attention to the mode of
3899 the files. Exim runs with umask(0) because the rest of the code creates
3900 files with open(), and sets the required mode explicitly. Thus, these
3901 files were ending up world-writeable. This was not a big issue, because,
3902 being within the spool directory, they were not world-accessible. I have
3903 created a function called modefopen, which takes an additional mode
3904 argument. It sets umask(777), creates the file, chmods it to the required
3905 mode, then resets the umask. All the relevant calls to fopen() in the
3906 content scanning code have been changed to use this function.
3908 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3909 to 24 hours. This avoids potential overflow problems when processing G
3910 and H retry rules. I suspect nobody ever tinkers with this value.
3912 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3914 PH/45 When the plaintext authenticator is running as a client, the server's
3915 challenges are checked to ensure they are valid base64 strings. By
3916 default, the authentication attempt is cancelled if an invalid string is
3917 received. Setting client_ignore_invalid_base64 true ignores these errors.
3918 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3919 they are received. Thus, the responses can be made to depend on the
3920 challenges. If an invalid string is ignored, an empty string is placed in
3923 PH/46 Messages that are created by the autoreply transport now contains a
3924 References: header, in accordance with RFCs 2822 and 3834.
3926 PH/47 Added authenticated_sender_force to the smtp transport.
3928 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3930 PH/49 Installed latest patch from the Sieve maintainer.
3932 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3933 was also set, the appendfile transport was unnecessarily scanning a
3934 directory of message files (e.g. for maildir delivery) to find the count
3935 of files (along with the size), even though it did not need this
3936 information. It now does the scan only if it needs to find either the
3937 size of the count of files.
3939 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3941 PH/52 Two bugs concerned with error handling when the smtp transport is
3944 (i) Exim was not creating retry information for temporary errors given
3945 for individual recipients after the DATA command when the smtp transport
3946 was used in LMTP mode. This meant that they could be retried too
3947 frequently, and not timed out correctly.
3949 (ii) Exim was setting the flag that allows error details to be returned
3950 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3951 recipients that were returned after the DATA command.
3953 PH/53 This is related to PH/52, but is more general: for any failing address,
3954 when detailed error information was permitted to be returned to the
3955 sender, but the error was temporary, then after the final timeout, only
3956 "retry timeout exceeded" was returned. Now it returns the full error as
3957 well as "retry timeout exceeded".
3959 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3960 do this, and (what is worse) MTAs that accept it.
3962 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3963 will now be deprecated.
3965 PH/56 New os.c-cygwin from the Cygwin maintainer.
3967 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3968 formats (previously only available in exim formats via -bpr, -bpru,
3969 and -bpra. Now also available in native and exiqgrep formats)
3971 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3972 with very large, slow to parse queues
3974 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3976 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3978 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3979 responses to authentication challenges, though it was showing the
3980 challenges; (ii) I've removed the CR characters from the debug output for
3983 PH/58 Allow for the insertion of a newline as well as a space when a string
3984 is turned into more than one encoded-word during RFC 2047 encoding. The
3985 Sieve code now uses this.
3987 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3988 data_4xx, lost_connection, tls_required.
3990 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3991 message was being sent as an SMTP response.
3993 PH/61 Add -l and -k options to exicyclog.
3995 PH/62 When verifying, if an address was redirected to one new address, so that
3996 verification continued, and the new address failed or deferred after
3997 having set something in $address_data, the value of $address_data was not
3998 passed back to the ACL. This was different to the case when no
3999 redirection occurred. The value is now passed back in both cases.
4001 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4002 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4003 use login_cap.h, so on its own it isn't the distinguishing feature. The
4004 new name refers directly to the setclassresources() function.
4006 PH/65 Added configuration files for NetBSD3.
4008 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4010 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4011 is preferred over IPv4.
4013 PH/68 The bounce_return_message and bounce_return_body options were not being
4014 honoured for bounces generated during the reception of non-SMTP messages.
4015 In particular, this applied to messages rejected by the ACL. This bug has
4016 been fixed. However, if bounce_return_message is true and bounce_return_
4017 body is false, the headers that are returned for a non-SMTP message
4018 include only those that have been read before the error was detected.
4019 (In the case of an ACL rejection, they have all been read.)
4021 PH/69 The HTML version of the specification is now built in a directory called
4022 spec_html instead of spec.html, because the latter looks like a path with
4023 a MIME-type, and this confuses some software.
4025 PH/70 Catch two compiler warnings in sieve.c.
4027 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4028 function verify_get_ident() calls ip_connect() to connect a socket, but
4029 if the "connect()" function timed out, ip_connect() used to close the
4030 socket. However, verify_get_ident() also closes the socket later, and in
4031 between Exim writes to the log, which may get opened at this point. When
4032 the socket was closed in ip_connect(), the log could get the same file
4033 descriptor number as the socket. This naturally causes chaos. The fix is
4034 not to close the socket in ip_connect(); the socket should be closed by
4035 the function that creates it. There was only one place in the code where
4036 this was missing, in the iplookup router, which I don't think anybody now
4037 uses, but I've fixed it anyway.
4039 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4040 well as to direct DNS lookups. Otherwise the handling of names in host
4041 lists is inconsistent and therefore confusing.
4047 PH/01 Two changes to the default runtime configuration:
4049 (1) Move the checks for relay_from_hosts and authenticated clients from
4050 after to before the (commented out) DNS black list checks.
4052 (2) Add control=submission to the relay_from_hosts and authenticated
4053 clients checks, on the grounds that messages accepted by these
4054 statements are most likely to be submissions.
4056 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4058 (1) Generate an error if the third argument for the ${prvs expansion is
4061 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4064 (3) Reset the variables that are obtained from the first argument of
4065 ${prvscheck and used in the second argument before leaving the code,
4066 because their memory is reclaimed, so using them afterwards may do
4069 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4070 one (it's much easier than Tom thought :-).
4072 (5) Because of (4), we can now allow for the use of $prvscheck_result
4073 inside the third argument.
4075 PH/03 For some reason, the default setting of PATH when running a command from
4076 a pipe transport was just "/usr/bin". I have changed it to
4079 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4080 anything to be listed in the output from -bV.
4082 PH/05 When a filter generated an autoreply, the entire To: header line was
4083 quoted in the delivery log line, like this:
4085 => >A.N.Other <ano@some.domain> <original@ddress> ...
4087 This has been changed so that it extracts the operative address. There
4088 may be more than one such address. If so, they are comma-separated, like
4091 => >ano@some.domain,ona@other.domain <original@ddress> ...
4093 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4094 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4095 not being looked up in the rDNS to get a host name, Exim was showing the
4096 IP address twice in Received: lines, even though the IP addresses were
4097 identical. For example:
4099 Received: from [1.2.3.4] (helo=[1.2.3.4])
4101 However, if the real host name was known, it was omitting the HELO data
4102 if it matched the actual IP address. This has been tidied up so that it
4103 doesn't show the same IP address twice.
4105 PH/07 When both +timestamp and +memory debugging was on, the value given by
4106 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4107 called by the debug printing, thereby overwriting the timestamp buffer.
4108 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4110 PH/08 When the original message was included in an autoreply transport, it
4111 always said "this is a copy of the message, including all the headers",
4112 even if body_only or headers_only was set. It now gives an appropriate
4115 PH/09 Applied a patch from the Sieve maintainer which:
4117 o fixes some comments
4118 o adds the (disabled) notify extension core
4119 o adds some debug output for the result of if/elsif tests
4120 o points to the current vacation draft in the documentation
4121 and documents the missing references header update
4125 o fixes a bug in processing the envelope test (when testing
4126 multiple envelope elements, the last element determined the
4129 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4130 Electronic Mail") by including:
4132 Auto-submitted: auto-generated
4134 in the messages that it generates (bounce messages and others, such as
4135 warnings). In the case of bounce messages for non-SMTP messages, there was
4136 also a typo: it was using "Auto_submitted" (underscore instead of
4137 hyphen). Since every message generated by Exim is necessarily in response
4138 to another message, thes have all been changed to:
4140 Auto-Submitted: auto-replied
4142 in accordance with these statements in the RFC:
4144 The auto-replied keyword:
4146 - SHOULD be used on messages sent in direct response to another
4147 message by an automatic process,
4149 - MUST NOT be used on manually-generated messages,
4151 - MAY be used on Delivery Status Notifications (DSNs) and Message
4152 Disposition Notifications (MDNs),
4154 - MUST NOT be used on messages generated by automatic or periodic
4155 processes, except for messages which are automatic responses to
4158 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4159 to the default Received: header definition.
4161 PH/12 Added log selector acl_warn_skipped (default on).
4163 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4164 variables because (a) they are in the wrong storage pool and (b) even if
4165 they were copied, it wouldn't work properly because of the caching.
4167 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4168 checking when decoding. Apparently there are clients that generate
4169 overlong encoded strings. Why am I not surprised?
4171 PH/15 If the first argument of "${if match_address" was not empty, but did not
4172 contain an "@" character, Exim crashed. Now it writes a panic log message
4173 and treats the condition as false.
4175 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4177 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4178 extension "envelope-auth". The code is finished and in agreement with
4179 other implementations, but there is no documentation so far and in fact,
4180 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4181 not changing the active code.
4183 Print executed "if" and "elsif" statements when debugging is used. This
4184 helps a great deal to understand what a filter does.
4186 Document more things not specified clearly in RFC3028. I had all this
4187 sorted out, when out of a sudden new issues came to my mind. Oops."
4189 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4192 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4193 canonical form (as documented). However, after a host name lookup from
4194 the IP address, check_host() was doing a simple string comparison with
4195 addresses acquired from the DNS when checking that the found name did
4196 have the original IP as one of its addresses. Since any found IPv6
4197 addresses are likely to be in abbreviated form, the comparison could
4198 fail. Luckily, there already exists a function for doing the comparison
4199 by converting both addresses to binary, so now that is used instead of
4200 the text comparison.
4202 PH/20 There was another similar case to PH/19, when a complete host name was
4203 given in a host list; looking up its IP address could give an abbreviated
4204 form, whereas the current host's name might or might not be abbreviated.
4205 The same fix has been applied.
4211 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4212 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4215 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4216 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4218 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4220 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4221 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4222 Also, for "Auto-Submitted", treat anything other than "no" as
4223 non-personal, in accordance with RFC 3834. (Previously it treated
4224 anything starting "auto-" as non-personal.)
4226 TF/01 The control=submission/name=... option had a problem with syntax
4227 errors if the name included a slash character. The /name= option
4228 now slurps the rest of the string, so it can include any characters
4229 but it must come last in the list of options (after /sender_retain
4232 PH/05 Some modifications to the interface to the fake nameserver for the new
4240 TK/01 Added the "success_on_redirect" address verification option. See
4241 NewStuff for rationale and an example.
4243 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4245 PH/02 Patch to exigrep to allow it to work on syslog lines.
4247 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4248 fread() to skip over the body file's header line, because in Cygwin the
4249 header line is locked and is inaccessible.
4251 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4252 co-exist for some time) to make it clear that it is the Exim ID that is
4253 referenced, not the Message-ID: header line.
4255 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4256 string_format() function, because snprintf() does not exist on all
4259 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4260 ${stat: expansion item.
4262 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4263 protocol synchronization error", to keep the pedants happy.
4265 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4266 well as for IRIX systems, when gcc is being used. See the host.c source
4269 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4271 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4274 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4275 transport and to the smtp transport in LMTP mode.
4277 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4279 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4280 run a filter in a subprocess. This could lead to confusion in subsequent
4281 lookups in the parent process. There should also be a search_tidyup() at
4282 the end of the subprocess.
4284 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4285 only if the host matched helo_try_verify_hosts, which caused the
4286 verification to occur when the EHLO/HELO command was issued. The ACL just
4287 tested the remembered result. Now, if a previous verification attempt has
4288 not happened, "verify = helo" does it there and then.
4290 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4292 TK/03 Fix log output including CR from clamd.
4294 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4295 exist provoked a memory error which could cause a segfault.
4297 PH/15 Installed PCRE 6.2
4299 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4301 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4302 of the problem. Specifically, suggested +O2 rather than +O1 for the
4305 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4307 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4308 record, the port was not correctly logged when the outgoing_port log
4309 selector was set (it logged the transort's default port).
4311 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4312 fallback_hosts, and "hosts" in the smtp transport.
4314 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4315 host errors such as "Connection refused".
4317 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4318 authentication with radiusclient 0.4.9:
4320 - Error returned from rc_read_config was caught wrongly
4321 - Username/password not passed on to radius server due to wrong length.
4323 The presumption is that some radiusclient API changes for 4.51/PH/17
4324 were not taken care of correctly. The code is still untested by me (my
4325 Linux distribution still has 0.3.2 of radiusclient), but it was
4326 contributed by a Radius user.
4328 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4329 expanding the "port" option of the smtp transport.
4331 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4332 while reading a MIME header. Thanks to Tom Hughes for a patch.
4334 PH/24 Include config.h inside local_scan.h so that configuration settings are
4337 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4338 that in an ACL for RCPT (for example), you can examine exactly what was
4341 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4342 commands, but it was not correctly comparing the address with the actual
4343 client host address. Thus, it would show the EHLO address in Received:
4344 header lines when this was not necessary.
4346 PH/27 Added the % operator to ${eval:}.
4348 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4349 it should be ignoring failures (because with -C, for example, it has lost
4350 privilege). It wasn't ignoring creation failures other than "already
4353 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4356 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4357 because an input line was too long, either on its own, or by virtue of
4358 too many continuations, the temporary file was not being removed, and the
4359 return code was incorrect.
4361 PH/31 Missing "BOOL" in function definition in filtertest.c.
4363 PH/32 Applied Sieve patches from the maintainer.
4365 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4367 PH/33 Added "verify = not_blind".
4369 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4370 Local/Makefile (with some defaults set). These are used in built scripts
4371 such as exicyclog, but they have never been used in the exim_install
4372 script (though there are many overriding facilities there). I have
4373 arranged that the exim_install script now takes note of these two
4376 PH/35 Installed configuration files for Dragonfly.
4378 PH/36 When a locally submitted message by a trusted user did not contain a
4379 From: header, and the sender address was obtained from -f or from an SMTP
4380 MAIL command, and the trusted user did not use -F to supply a sender
4381 name, $originator_name was incorrectly used when constructing a From:
4382 header. Furthermore, $originator_name was used for submission mode
4383 messages from external hosts without From: headers in a similar way,
4384 which is clearly wrong.
4386 PH/37 Added control=suppress_local_fixups.
4388 PH/38 When log_selector = +received_sender was set, and the addition of the
4389 sender made the log line's construction buffer exactly full, or one byte
4390 less than full, an overflow happened when the terminating "\n" was
4393 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4394 when the result of a list match is failure because a DNS lookup failed.
4396 PH/40 RM_COMMAND is now used in the building process.
4398 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4399 the "build-* directories that it finds.
4401 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4402 address in a domain literal was a prefix of an interface address.
4404 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4405 when verifying a sender address, unless rewrite_headers is false.
4407 PH/44 Wrote a long comment about why errors_to addresses are verified as
4408 recipients, not senders.
4410 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4411 the ratelimit ACL was added.
4413 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4415 PH/46 Added extra information about PostgreSQL errors to the error string.
4417 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4418 avoiding the need to install special zones in a real server. This is
4419 backwards compatible; if it can't find the fake resolver, it drops back.
4420 Thus, both old and new test suites can be run.
4422 TF/02 Added util/ratelimit.pl
4424 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4425 clock is set back in time.
4427 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4428 Candler <B.Candler@pobox.com>.
4430 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4431 OK for addresses that are the result of redirections.
4433 PH/48 A number of further additions for the benefit of the new test suite,
4434 including a fake gethostbyname() that interfaces to the fake DNS resolver
4437 TF/06 The fix for widen_domains has also been applied to qualify_single and
4438 search_parents which are the other dnslookup options that can cause
4441 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4444 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4446 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4447 service" if it encountered an MX record with an empty target hostname.
4448 The message is now "an MX or SRV record indicated no SMTP service".
4450 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4451 if the DNS of the sending site is misconfigured. This is quite a
4452 common situation. This change restores the behaviour of treating a
4453 helo verification defer as a failure.
4455 PH/51 If self=fail was set on a router, the bounce message did not include the
4456 actual error message.
4462 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4464 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4465 command itself ended in error, the underlying message about the transport
4466 filter timeout was being overwritten with the pipe command error. Now the
4467 underlying error message should be appended to the second error message.
4469 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4471 PH/02 Reduce the amount of output that "make" produces by default. Full output
4472 can still be requested.
4474 PH/03 The warning log line about a condition test deferring for a "warn" verb
4475 was being output only once per connection, rather than after each
4476 occurrence (because it was using the same function as for successful
4477 "warn" verbs). This seems wrong, so I have changed it.
4479 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4480 it should not have, which might have caused a crash in the right
4481 circumstances, but probably never did.
4483 PH/04 Installed a modified version of Tony Finch's patch to make submission
4484 mode fix the return path as well as the Sender: header line, and to
4485 add a /name= option so that you can make the user's friendly name appear
4488 TF/03 Added the control = fakedefer ACL modifier.
4490 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4491 Mark Lowes for thorough testing.
4493 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4495 TK/03 Merged latest SRS patch from Miles Wilton.
4497 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4498 with the definition in sysexits.h (which is #included earlier).
4499 Fortunately, Exim does not actually use EX_OK. The code used to try to
4500 preserve the sysexits.h value, by assuming that macro definitions were
4501 scanned for macro replacements. I have been disabused of this notion,
4502 so now the code just undefines EX_OK before #including unistd.h.
4504 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4505 in the smtp transport. When a block could not be written in a single
4506 write() function, the timeout was being re-applied to each part-write.
4507 This seems wrong - if the receiver was accepting one byte at a time it
4508 would take for ever. The timeout is now adjusted when this happens. It
4509 doesn't have to be particularly precise.
4511 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4512 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4514 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4515 without a domain if the check to <postmaster@domain> fails.
4517 SC/01 Eximstats: added -xls and the ability to specify output files
4518 (patch written by Frank Heydlauf).
4520 SC/02 Eximstats: use FileHandles for outputting results.
4522 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4524 SC/04 Eximstats: fixed display of large numbers with -nvr option
4526 SC/05 Eximstats: fixed merging of reports with empty tables.
4528 SC/06 Eximstats: added the -include_original_destination flag
4530 SC/07 Eximstats: removed tabs and trailing whitespace.
4532 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4534 TK/06 MBOX spool code: Add real "From " MBOX separator line
4535 so the .eml file is really in mbox format (even though
4536 most programs do not really care). Patch from Alex Miller.
4538 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4539 The latter is generated from $received_to and is only set if the
4540 message has one envelope recipient. SA can use these headers,
4541 obviously out-of-the-box. Patch from Alex Miller.
4543 PH/08 The ${def test on a variable was returning false if the variable's
4544 value was "0", contrary to what the specification has always said!
4545 The result should be true unless the variable is empty.
4547 PH/09 The syntax error of a character other than { following "${if
4548 def:variable_name" (after optional whitespace) was not being diagnosed.
4549 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4550 accidental colon was present, for example, could give incorrect results.
4552 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4553 result is used (not including appendfile, where other changes are about
4556 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4557 This involved changing a lot of size variables from int to off_t. It
4558 should work with maildirs and everything.
4560 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4561 spamd dying while we are connected to it.
4563 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4566 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4567 function for BDB 4.3.
4569 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4571 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4572 the sources for PCRE have been re-arranged and more files are now
4575 PH/15 The code I had for printing potentially long long variables in PH/11
4576 above was not the best (it lost precision). The length of off_t variables
4577 is now inspected at build time, and an appropriate printing format (%ld
4578 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4579 to be "long long int" or "long int". This is needed for the internal
4580 formatting function string_vformat().
4582 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4583 the configuration file to be ":syslog", then the script "guesses" where
4584 the logs files are, rather than using the compiled in default. In our
4585 case the guess is not the same as the compiled default, so the script
4586 suddenly stopped working when I started to use syslog. The patch checks
4587 to see if log_file_path is "". If so, it attempts to read it from exim
4588 with no configuration file to get the compiled in version, before it
4589 falls back to the previous guessing code."
4591 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4592 implementing BATV in an Exim configuration. See NewStuff for the gory
4595 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4596 Makefile that are specific to HP-UX.
4598 PH/18 If the "use_postmaster" option was set for a recipient callout together
4599 with the "random" option, the postmaster address was used as the MAIL
4600 FROM address for the random test, but not for the subsequent recipient
4601 test. It is now used for both.
4603 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4604 patch removes a few documentation additions to RFC 3028, because the
4605 latest draft now contains them. It adds the new en;ascii-case comparator
4606 and a new error check for 8bit text in MIME parts. Comparator and
4607 require names are now matched exactly. I enabled the subaddress
4608 extension, but it is not well tested yet (read: it works for me)."
4610 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4611 rework some of the code of TK/09 above to avoid the hardwired use of
4612 "%lld" and "long long". Replaced the call to snprintf() with a call to
4615 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4616 records point to non-existent hosts", "retry timeout exceeded", and
4617 "retry time not reached for any host after a long failure period".
4619 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4620 experimental DomainKeys support:
4622 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4623 (2) On an error such as an illegally used "control", the wrong name for
4624 the control was given.
4626 These problems did NOT occur unless DomainKeys support was compiled.
4628 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4630 PH/24 Added ${if match_ip condition.
4632 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4633 databases so that it will be absolutely obvious if a crash occurs in the
4634 DB library. This is a regular occurrence (often caused by mis-matched
4637 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4638 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4639 picked up on a user's system that detects such things. There doesn't seem
4640 to be a gcc warning option for this - only an attribute that has to be
4641 put on the function's prototype. It seems that in Fedora Core 4 they have
4642 set this on a number of new functions. No doubt there will be more in due
4645 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4646 specify a transport. However, if an address that was verified by such a
4647 router was the subject of a callout, Exim crashed because it tried to
4648 read the rcpt_include_affixes from the non-existent transport. Now it
4649 just assumes that the setting of that option is false. This bug was
4650 introduced by 4.51/PH/31.
4652 PH/28 Changed -d+all to exclude +memory, because that information is very
4653 rarely of interest, but it makes the output a lot bigger. People tend to
4654 do -d+all out of habit.
4656 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4657 code in os-type was giving problems when libc.so lives in lib64, like on
4660 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4661 aren't the modern standard, and it seems that some systems' include files
4662 don't always have them. Exim was already checking for some of the newer
4663 ones like T_AAAA, and defining it itself. I've added checks for all the
4664 record types that Exim uses.
4666 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4667 not automatically generating a new one, as it is supposed to. This
4668 prevented TLS from working. If the file did exist, but contained invalid
4669 data, a new version was generated, as expected. It was only the case of a
4670 non-existent file that was broken.
4672 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4673 with a change in libdomainkeys > 0.64.
4675 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4676 from DNS. If the selector record carries the flag, it now has
4677 precedence over the domain-wide flag.
4679 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4681 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4682 the use of a port name that isn't defined in /etc/services) occurred, the
4683 message was deferred as in a normal delivery, and thus remained on the
4684 spool, instead of being failed because of the mua_wrapper setting. This
4685 is now fixed, and I tidied up some of the mua_wrapper messages at the
4688 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4689 the messages in a hash of arrays rather than using individual hashes.
4690 This is a bit cleaner and results in dramatic memory savings, albeit
4691 at a slight CPU cost.
4693 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4694 as requested by Marc Sherman.
4696 SC/10 Eximstats: added histograms for user specified patterns as requested
4699 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4701 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4702 fopen() in the content-scanning modules that did not already have it.
4708 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4709 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4711 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4713 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4715 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4716 to test Sieve filters that use "vacation".
4718 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4719 that changes the way the GnuTLS parameters are stored in the cache file.
4720 The new format can be generated externally. For backward compatibility,
4721 if the data in the cache doesn't make sense, Exim assumes it has read an
4722 old-format file, and it generates new data and writes a new file. This
4723 means that you can't go back to an older release without removing the
4726 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4727 work if there are any delivery delays because "one_time" forces the
4728 parent to be marked "delivered", so its unseen clone is never tried
4729 again. For this reason, Exim now forbids the simultaneous setting of
4732 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4733 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4734 entry if you want to know the details. The fix, however, neglected to
4735 consider the case when local delivery batching is involved. The test for
4736 "previously delivered" was not happening when checking to see if an
4737 address could be batched with a previous (undelivered) one; under
4738 certain circumstances this could lead to multiple deliveries to the same
4741 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4742 in its include files, and this causes problems building Exim.
4744 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4745 header_syntax) but Exim was just ignoring anything given after a slash.
4746 In particular, this caused confusion with an attempt to use "verify =
4747 reverse_host_lookup/defer_ok". An error is now given when options are
4748 supplied for verify items that do not have them. (Maybe reverse_host_
4749 lookup should have a defer_ok option, but that's a different point.)
4751 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4752 defined by RFC 821) to 2048, because there were problems with some AUTH
4753 commands, and RFC 1869 says the size should be increased for extended
4754 SMTP commands that take arguments.
4756 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4759 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4760 "unknown" error; now it says that the functionality isn't in the binary.
4762 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4763 an address' error message when a string expansion fails (syntax or
4764 whatever). Otherwise the password may appear in the log. Following change
4765 PH/42 below, there is no longer a chance of it appearing in a bounce
4768 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4770 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4771 of its addresses was ever tried. (Bugzilla bug #2.)
4773 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4774 the result incorrectly in the debug output. (It correctly added a newline
4775 to what was transported.)
4777 TF/01 Added $received_time.
4779 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4780 commented out examples of how to interface to a virus scanner and to
4781 SpamAssassin. Also added commented examples of av_scanner and
4782 spamd_address settings.
4784 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4785 and controls are allowed in which ACLs. There were a couple of minor
4786 errors. Some of the entries in the conditions table (which is a table of
4787 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4788 negation of where the condition IS allowed.
4790 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4792 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4793 header file does not have a version number, so I've had to invent a new
4794 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4795 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4796 radiusclient), but it was contributed by a Radius user.
4798 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4799 files or directories, for OpenSSL.
4801 PH/19 When an Exim process that is running as root has to create an Exim log
4802 file, it does so in a subprocess that runs as exim:exim so as to get the
4803 ownership right at creation (otherwise, other Exim processes might see
4804 the file with the wrong ownership). There was no test for failure of this
4805 fork() call, which would lead to the process getting stuck as it waited
4806 for a non-existent subprocess. Forks do occasionally fail when resources
4807 run out. I reviewed all the other calls to fork(); they all seem to check
4810 PH/20 When checking for unexpected SMTP input at connect time (before writing
4811 the banner), Exim was not dealing correctly with a non-positive return
4812 from the read() function. If the client had disconnected by this time,
4813 the result was a log entry for a synchronization error with an empty
4814 string after "input=" when read() returned zero. If read() returned -1
4815 (an event I could not check), uninitialized data bytes were printed.
4816 There were reports of junk text (parts of files, etc) appearing after
4819 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4821 PH/22 Added support for macro redefinition, and (re)definition in between
4822 driver and ACL definitions.
4824 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4825 forgetting to use the resulting value; it was using the unexpanded value.
4827 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4828 hadn't been configured. The fix is from Juergen Kreileder, who
4829 understands it better than I do:
4831 "Here's what I see happening with three configured cyrus_sasl
4832 authenticators configured (plain, login, cram-md5):
4834 On startup auth_cyrus_sasl_init() gets called for each of these.
4835 This means three calls to sasl_listmech() without a specified mech_list.
4836 => SASL tests which mechs of all available mechs actually work
4837 => three warnings about OTP not working
4838 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4840 With the patch, sasl_listmech() also gets called three times. But now
4841 SASL's mech_list option is set to the server_mech specified in the the
4842 authenticator. Or in other words, the answer from sasl_listmech()
4843 gets limited to just the mech you're testing for (which is different
4845 => the return list contains just 'plain' or 'login', 'cram-md5' or
4846 nothing depending on the value of ob->server_mech.
4848 I've just tested the patch: Authentication still works fine,
4849 unavailable mechs specified in the exim configuration are still
4850 caught, and the auth.log warnings about OTP are gone."
4852 PH/25 When debugging is enabled, the contents of the command line are added
4853 to the debugging output, even when log_selector=+arguments is not
4856 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4857 answer is "GNU", and only if the return is "GNU/something" is the answer
4860 PH/27 $acl_verify_message is now set immediately after the failure of a
4861 verification in an ACL, and so is available in subsequent modifiers. In
4862 particular, the message can be preserved by coding like this:
4864 warn !verify = sender
4865 set acl_m0 = $acl_verify_message
4867 Previously, $acl_verify_message was set only while expanding "message"
4868 and "log_message" when a very denied access.
4870 PH/28 Modified OS/os.c-Linux with
4872 -#ifndef OS_LOAD_AVERAGE
4873 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4875 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4876 nomenclature these days.)
4878 PH/29 Installed patch from the Sieve maintainer that adds the options
4879 sieve_useraddress and sieve_subaddress to the redirect router.
4881 PH/30 In these circumstances:
4882 . Two addresses routed to the same list of hosts;
4883 . First host does not offer TLS;
4884 . First host accepts first address;
4885 . First host gives temporary error to second address;
4886 . Second host offers TLS and a TLS session is established;
4887 . Second host accepts second address.
4888 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4889 and peerdn, if requested) that were in fact used only for the second
4892 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4893 attention to any local part prefix or suffix that was matched by the
4894 router that accepted the address. It now behaves in the same way as it
4895 does for delivery: the affixes are removed from the local part unless
4896 rcpt_include_affixes is set on the transport.
4898 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4899 timeout during the DATA phase of an incoming message.
4901 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4902 applied a patch sanctioned by the Sieve maintainer.
4904 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4905 the uid or gid is negative. A case of a negative gid caused this to be
4906 noticed. The fix allows for either to be negative.
4908 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4909 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4912 PH/36 The change PH/12 above was broken. Fixed it.
4914 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4915 the grounds that routing the same address twice would always produce the
4916 same answer. This might have been true once, but it is certainly no
4917 longer true now. Routing a child address may depend on the previous
4918 routing that produced that child. Some complicated redirection strategies
4919 went wrong when messages had multiple recipients, and made Exim's
4920 behaviour dependent on the order in which the addresses were given.
4922 I have moved the duplicate checking until after the routing is complete.
4923 Exim scans the addresses that are assigned to local and remote
4924 transports, and removes any duplicates. This means that more work will be
4925 done, as duplicates will always all be routed, but duplicates are
4926 presumably rare, so I don't expect this is of any significance.
4928 For deliveries to pipes, files, and autoreplies, the duplicate checking
4929 still happens during the routing process, since they are not going to be
4932 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4933 It corrects a timeout issue with spamd. This is Ian's comment: "The
4934 background is that sometimes spamd either never reads data from a
4935 connection it has accepted, or it never writes response data. The exiscan
4936 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4937 blindly assumes that writes won't block so it may never time out."
4939 PH/39 Allow G after quota size as well as K and M.
4941 PH/40 The value set for $authenticated_id in an authenticator may not contain
4942 binary zeroes or newlines because the value is written to log lines and
4943 to spool files. There was no check on this. Now the value is run through
4944 the string_printing() function so that such characters are converted to
4945 printable escape sequences.
4947 PH/41 $message_linecount is a new variable that contains the total number of
4948 lines in the message. Compare $body_linecount, which is the count for the
4951 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4952 bounce and delay warning messages, except in certain special cases, which
4955 (a) An SMTP error message from a remote host;
4956 (b) A message specified in a :fail: redirection;
4957 (c) A message specified in a "fail" command in a system filter;
4958 (d) A message specified in a FAIL return from the queryprogram router;
4959 (e) A message specified by the cannot_route_message router option.
4961 In these cases only, Exim does include the error details in bounce and
4962 warning messages. There are also a few cases where bland messages such
4963 as "unrouteable address" or "local delivery error" are given.
4965 PH/43 $value is now also set for the "else" part of a ${run expansion.
4967 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4968 being worked on, but at least Exim now implements the latest version to
4971 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4972 process to complete was treated as a delivery failure, a timeout while
4973 writing the message to the pipe was logged, but erroneously treated as a
4974 successful delivery. Such timeouts include transport filter timeouts. For
4975 consistency with the overall process timeout, these timeouts are now
4976 treated as errors, giving rise to delivery failures by default. However,
4977 there is now a new Boolean option for the pipe transport called
4978 timeout_defer, which, if set TRUE, converts the failures into defers for
4979 both kinds of timeout. A transport filter timeout is now identified in
4982 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4983 systems where "make" and "gmake" are different, calling "gmake" at top
4984 level broke things. I've arranged for the value of $(MAKE) to be passed
4985 from the Makefile to this script so that it can call the same version of
4989 A note about Exim versions 4.44 and 4.50
4990 ----------------------------------------
4992 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4993 changes of various kinds. As a consequence, a big documentation update was
4994 needed. This delayed the release for rather longer than seemed good, especially
4995 in the light of a couple of (minor) security issues. Therefore, the changes
4996 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4997 release. So 4.44 and 4.50 are in effect two different branches that both start
5000 I have left the 4.50 change log unchanged; it contains all the changes since
5001 4.43. The change log for 4.44 is below; many of its items are identical to
5002 those for 4.50. This seems to be the most sensible way to preserve the
5003 historical information.
5009 1. Minor wording change to the doc/README.SIEVE file.
5011 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5012 computation of the current number of files was incorrect.
5014 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5015 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5018 4. Give more explanation in the error message when the command for a transport
5019 filter fails to execute.
5021 5. There are several places where Exim runs a non-Exim command in a
5022 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5023 was being done only for the command run by the queryprogram router. It is
5024 now done for all such subprocesses. The other cases are: ${run, transport
5025 filters, and the commands run by the lmtp and pipe transports.
5027 6. Added CONFIGURE_GROUP build-time option.
5029 7. Some older OS have a limit of 256 on the maximum number of file
5030 descriptors. Exim was using setrlimit() to set 1000 as a large value
5031 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5032 systems. I've change it so that if it can't get 1000, it tries for 256.
5034 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5035 was an oversight, and furthermore, ever since the addition of extra
5036 controls (e.g. 4.43/32), the checks on when to allow different forms of
5037 "control" were broken. There should now be diagnostics for all cases when a
5038 control that does not make sense is encountered.
5040 9. Added the /retain_sender option to "control=submission".
5042 10. $recipients is now available in the predata ACL (oversight).
5044 11. Tidy the search cache before the fork to do a delivery from a message
5045 received from the command line. Otherwise the child will trigger a lookup
5046 failure and thereby defer the delivery if it tries to use (for example) a
5047 cached ldap connection that the parent has called unbind on.
5049 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5050 of $address_data from the recipient verification was clobbered by the
5051 sender verification.
5053 13. The value of address_data from a sender verification is now available in
5054 $sender_address_data in subsequent conditions in the ACL statement.
5056 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5058 15. Added a new option "connect=<time>" to callout options, to set a different
5061 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5062 was its contents. (It was OK if the option was not defined at all.)
5064 17. A "Completed" log line is now written for messages that are removed from
5065 the spool by the -Mrm option.
5067 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5068 information about exactly what failed.
5070 19. Added -dd to debug only the daemon process.
5072 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5073 handles timeouts, both on the server side and network timeouts. Renamed the
5074 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5076 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5077 It is now set to "smtps".
5079 22. $host_address is now set to the target address during the checking of
5080 ignore_target_hosts.
5082 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5083 being passed; this would have caused $sender_host_name to have been used if
5084 matching the list had actually called for a host name (not very likely,
5085 since this list is usually IP addresses). A host name is now passed as
5088 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5089 code that specifies a non-restarting handler (typically sigaction() in
5090 modern systems) in an attempt to fix a rare and obscure crash bug.
5092 25. Narrowed the window for a race in the daemon that could cause it to ignore
5093 SIGCHLD signals. This is not a major problem, because they are used only to
5094 wake it up if nothing else does.
5096 26. A malformed maildirsize file could cause Exim to calculate negative values
5097 for the mailbox size or file count. Odd effects could occur as a result.
5098 The maildirsize information is now recalculated if the size or filecount
5101 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5102 support for a long time. Removed HAVE_SYS_VFS_H.
5104 28. Installed the latest version of exipick from John Jetmore.
5106 29. In an address list, if the pattern was not a regular expression, an empty
5107 subject address (from a bounce message) matched only if the pattern was an
5108 empty string. Non-empty patterns were not even tested. This was the wrong
5109 because it is perfectly reasonable to use an empty address as part of a
5110 database query. An empty address is now tested by patterns that are
5111 lookups. However, all the other forms of pattern expect the subject to
5112 contain a local part and a domain, and therefore, for them, an empty
5113 address still always fails if the pattern is not itself empty.
5115 30. Exim went into a mad DNS loop when attempting to do a callout where the
5116 host was specified on an smtp transport, and looking it up yielded more
5117 than one IP address.
5119 31. Re-factored the code for checking spool and log partition space into a
5120 function that finds that data and another that does the check. The former
5121 is then used to implement four new variables: $spool_space, $log_space,
5122 $spool_inodes, and $log_inodes.
5124 32. The RFC2047 encoding function was originally intended for short strings
5125 such as real names; it was not keeping to the 75-character limit for
5126 encoded words that the RFC imposes. It now respects the limit, and
5127 generates multiple encoded words if necessary. To be on the safe side, I
5128 have increased the buffer size for the ${rfc2047: expansion operator from
5131 33. It is now permitted to omit both strings after an "if" condition; if the
5132 condition is true, the result is "true". As before, when the second string
5133 is omitted, a false condition yields an empty string. This makes it less
5134 cumbersome to write custom ACL and router conditions.
5136 34. Failure to deliver a bounce message always caused it to be frozen, even if
5137 there was an errors_to setting on the router. The errors_to setting is now
5140 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5141 canonical form (fully expanded) before being placed in
5142 $sender_host_address.
5144 36. The table in the code that translates DNS record types into text (T_A to
5145 "A" for instance) was missing entries for NS and CNAME. It is just possible
5146 that this could have caused confusion if both these types were looked up
5147 for the same domain, because the text type is used as part of Exim's
5148 per-process caching. But the chance of anyone hitting this buglet seems
5151 37. The dnsdb lookup has been extended in a number of ways.
5153 (1) There is a new type, "zns", which walks up the domain tree until it
5154 finds some nameserver records. It should be used with care.
5156 (2) There is a new type, "mxh", which is like "mx" except that it returns
5157 just the host names, not the priorities.
5159 (3) It is now possible to give a list of domains (or IP addresses) to be
5160 looked up. The behaviour when one of the lookups defers can be
5161 controlled by a keyword.
5163 (4) It is now possible to specify the separator character for use when
5164 multiple records are returned.
5166 38. The dnslists ACL condition has been extended: it is now possible to supply
5167 a list of IP addresses and/or domains to be looked up in a particular DNS
5170 39. Added log_selector=+queue_time_overall.
5172 40. When running the queue in the test harness, wait just a tad after forking a
5173 delivery process, to get repeatability of debugging output.
5175 41. Include certificate and key file names in error message when GnuTLS fails
5176 to set them up, because the GnuTLS error message doesn't include the name
5177 of the failing file when there is a problem reading it.
5179 42. Allow both -bf and -bF in the same test run.
5181 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5183 44. The "Exiscan patch" is now merged into the mainline Exim source.
5185 45. Sometimes the final signoff response after QUIT could fail to get
5186 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5187 < 0 before doing a fflush(). This bug looks as though it goes back to the
5188 introduction of TLS in release 3.20, but "sometimes" must have been rare
5189 because the tests only now provoked it.
5191 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5192 (this can affect the format of dates).
5194 47. exim_tidydb, when checking for the continued existence of a message for
5195 which it has found a message-specific retry record, was not finding
5196 messages that were in split spool directories. Consequently, it was
5197 deleting retry records that should have stayed in existence.
5199 48. Steve fixed some bugs in eximstats.
5201 49. The SPA authentication driver was not abandoning authentication and moving
5202 on to the next authenticator when an expansion was forced to fail,
5203 contradicting the general specification for all authenticators. Instead it
5204 was generating a temporary error. It now behaves as specified.
5206 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5207 (the order specifies the preference for clients). The order is now AES256,
5208 AES128, 3DES, ARCFOUR128.
5210 51. Small patch to Sieve code - explicitly set From: when generating an
5213 52. Exim crashed if a remote delivery caused a very long error message to be
5214 recorded - for instance if somebody sent an entire SpamAssassin report back
5215 as a large number of 550 error lines. This bug was coincidentally fixed by
5216 increasing the size of one of Exim's internal buffers (big_buffer) that
5217 happened as part of the Exiscan merge. However, to be on the safe side, I
5218 have made the code more robust (and fixed the comments that describe what
5221 53. Now that there can be additional text after "Completed" in log lines (if
5222 the queue_time_overall log selector is set), a one-byte patch to exigrep
5223 was needed to allow it to recognize "Completed" as not the last thing in
5226 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5227 patch that reportedly fixes this has been added. I am not expert enough to
5228 create a test for it. This is what the patch creator wrote:
5230 "I found a little strange behaviour of ldap code when working with
5231 Windows 2003 AD Domain, where users was placed in more than one
5232 Organization Units. When I tried to give exim partial DN, the exit code
5233 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5234 But simultaneously result of request was absolutely normal ldap result,
5235 so I produce this patch..."
5237 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5238 REFERENCE, so I have modified the code to exclude the patch when that macro
5241 55. Some experimental protocols are using DNS PTR records for new purposes. The
5242 keys for these records are domain names, not reversed IP addresses. The
5243 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5244 leaves it alone. Component reversal etc. now happens only for IP addresses.
5247 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5249 57. Double the size of the debug message buffer (to 2048) so that more of very
5250 long debug lines gets shown.
5252 58. The exicyclog utility now does better if the number of log files to keep
5253 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5255 59. Two changes related to the smtp_active_hostname option:
5257 (1) $smtp_active_hostname is now available as a variable.
5258 (2) The default for smtp_banner uses $smtp_active_hostname instead
5259 of $primary_hostname.
5261 60. The host_aton() function is supposed to be passed a string that is known
5262 to be a valid IP address. However, in the case of IPv6 addresses, it was
5263 not checking this. This is a hostage to fortune. Exim now panics and dies
5264 if the condition is not met. A case was found where this could be provoked
5265 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5266 components; fortuitously, this particular loophole had already been fixed
5267 by change 4.50/55 above.
5269 If there are any other similar loopholes, the new check in host_aton()
5270 itself should stop them being exploited. The report I received stated that
5271 data on the command line could provoke the exploit when Exim was running as
5272 exim, but did not say which command line option was involved. All I could
5273 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5274 running as the user.
5277 61. There was a buffer overflow vulnerability in the SPA authentication code
5278 (which came originally from the Samba project). I have added a test to the
5279 spa_base64_to_bits() function which I hope fixes it.
5282 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5283 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5285 63. The daemon start-up calls getloadavg() while still root for those OS that
5286 need the first call to be done as root, but it missed one case: when
5287 deliver_queue_load_max is set with deliver_drop_privilege. This is
5288 necessary for the benefit of the queue runner, because there is no re-exec
5289 when deliver_drop_privilege is set.
5291 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5292 This has been fixed.
5294 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5295 was in use, was not putting the data itself into the right store pool;
5296 consequently, it could be overwritten for a subsequent message in the same
5297 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5300 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5302 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5303 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5304 the function were treating the return as a boolean value, which happened to
5305 work because 0=false and not-0=true, but is not correct code.
5307 68. The host_aton() function was not handling scoped IPv6 addresses (those
5308 with, for example, "%eth0" on the end) correctly.
5310 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5311 negated items (that is, ~something) in unsigned ints. Some compilers
5312 apparently mutter when there is no cast.
5314 70. If an address verification called from an ACL failed, and did not produce a
5315 user-specific message (i.e. there was only a "system" message), nothing was
5316 put in $acl_verify_message. In this situation, it now puts the system
5319 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5320 session; change 4.31/43 added the unwanted input to the log line - except
5321 that it did not do this in the start of session case. It now does.
5323 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5324 This is wrong and can cause the other end to generate a synchronization
5325 error if it is another Exim or anything else that does the synchronization
5326 check. A QUIT command is no longer sent after a timeout.
5328 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5329 during host lookups.
5331 74. The defer_ok option of callout verification was not working if it was used
5332 when verifying addresses in header lines, that is, for this case:
5334 verify = header_sender/callout=defer_ok
5336 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5337 those file descriptors could be used for SMTP connections. If anything
5338 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5339 could be sent to the SMTP client, causing chaos. The daemon now opens
5340 stdin, stdout, and stderr to /dev/null when it puts itself into the
5343 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5344 log by default. The user can override this with suitable Perl magic.
5346 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5347 the log message when discard triggers, was not working for the DATA ACL or
5348 for the non-SMTP ACL.
5350 78. Error message wording change in sieve.c.
5352 79. If smtp_accept_max_per_host was set, the number of connections could be
5353 restricted to fewer than expected, because the daemon was trying to set up
5354 a new connection before checking whether the processes handling previous
5355 connections had finished. The check for completed processes is now done
5356 earlier. On busy systems, this bug wouldn't be noticed because something
5357 else would have woken the daemon, and it would have reaped the completed
5360 80. If a message was submitted locally by a user whose login name contained one
5361 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5362 It caused a spool format error. I have fixed the spool reading code. A
5363 related problem was that the "from" clause in the Received: line became
5364 illegal because of the space(s). It is now covered by ${quote_local_part.
5366 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5369 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5371 83. Patch from Sieve maintainer to fix unterminated string problem in
5372 "vacation" handling.
5374 84. Some minor changes to the Linux configuration files to help with other
5375 OS variants using glibc.
5377 85. One more patch for Sieve to update vacation handling to latest spec.
5380 ----------------------------------------------------
5381 See the note above about the 4.44 and 4.50 releases.
5382 ----------------------------------------------------
5388 1. Change 4.43/35 introduced a bug that caused file counts to be
5389 incorrectly computed when quota_filecount was set in an appendfile
5392 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5393 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5396 3. Give more explanation in the error message when the command for a transport
5397 filter fails to execute.
5399 4. There are several places where Exim runs a non-Exim command in a
5400 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5401 was being done only for the command run by the queryprogram router. It is
5402 now done for all such subprocesses. The other cases are: ${run, transport
5403 filters, and the commands run by the lmtp and pipe transports.
5405 5. Some older OS have a limit of 256 on the maximum number of file
5406 descriptors. Exim was using setrlimit() to set 1000 as a large value
5407 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5408 systems. I've change it so that if it can't get 1000, it tries for 256.
5410 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5411 was an oversight, and furthermore, ever since the addition of extra
5412 controls (e.g. 4.43/32), the checks on when to allow different forms of
5413 "control" were broken. There should now be diagnostics for all cases when a
5414 control that does not make sense is encountered.
5416 7. $recipients is now available in the predata ACL (oversight).
5418 8. Tidy the search cache before the fork to do a delivery from a message
5419 received from the command line. Otherwise the child will trigger a lookup
5420 failure and thereby defer the delivery if it tries to use (for example) a
5421 cached ldap connection that the parent has called unbind on.
5423 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5424 of $address_data from the recipient verification was clobbered by the
5425 sender verification.
5427 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5428 was its contents. (It was OK if the option was not defined at all.)
5430 11. A "Completed" log line is now written for messages that are removed from
5431 the spool by the -Mrm option.
5433 12. $host_address is now set to the target address during the checking of
5434 ignore_target_hosts.
5436 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5437 being passed; this would have caused $sender_host_name to have been used if
5438 matching the list had actually called for a host name (not very likely,
5439 since this list is usually IP addresses). A host name is now passed as
5442 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5443 code that specifies a non-restarting handler (typically sigaction() in
5444 modern systems) in an attempt to fix a rare and obscure crash bug.
5446 15. Narrowed the window for a race in the daemon that could cause it to ignore
5447 SIGCHLD signals. This is not a major problem, because they are used only to
5448 wake it up if nothing else does.
5450 16. A malformed maildirsize file could cause Exim to calculate negative values
5451 for the mailbox size or file count. Odd effects could occur as a result.
5452 The maildirsize information is now recalculated if the size or filecount
5455 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5456 support for a long time. Removed HAVE_SYS_VFS_H.
5458 18. Updated exipick to current release from John Jetmore.
5460 19. Allow an empty sender to be matched against a lookup in an address list.
5461 Previously the only cases considered were a regular expression, or an
5464 20. Exim went into a mad DNS lookup loop when doing a callout where the
5465 host was specified on the transport, if the DNS lookup yielded more than
5468 21. The RFC2047 encoding function was originally intended for short strings
5469 such as real names; it was not keeping to the 75-character limit for
5470 encoded words that the RFC imposes. It now respects the limit, and
5471 generates multiple encoded words if necessary. To be on the safe side, I
5472 have increased the buffer size for the ${rfc2047: expansion operator from
5475 22. Failure to deliver a bounce message always caused it to be frozen, even if
5476 there was an errors_to setting on the router. The errors_to setting is now
5479 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5480 canonical form (fully expanded) before being placed in
5481 $sender_host_address.
5483 24. Updated eximstats to version 1.33
5485 25. Include certificate and key file names in error message when GnuTLS fails
5486 to set them up, because the GnuTLS error message doesn't include the name
5487 of the failing file when there is a problem reading it.
5489 26. Expand error message when OpenSSL has problems setting up cert/key files.
5492 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5493 (this can affect the format of dates).
5495 28. exim_tidydb, when checking for the continued existence of a message for
5496 which it has found a message-specific retry record, was not finding
5497 messages that were in split spool directories. Consequently, it was
5498 deleting retry records that should have stayed in existence.
5500 29. eximstats updated to version 1.35
5501 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5502 1.35 - bugfix such that pie charts by volume are generated correctly
5504 30. The SPA authentication driver was not abandoning authentication and moving
5505 on to the next authenticator when an expansion was forced to fail,
5506 contradicting the general specification for all authenticators. Instead it
5507 was generating a temporary error. It now behaves as specified.
5509 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5510 (the order specifies the preference for clients). The order is now AES256,
5511 AES128, 3DES, ARCFOUR128.
5513 31. Small patch to Sieve code - explicitly set From: when generating an
5516 32. Exim crashed if a remote delivery caused a very long error message to be
5517 recorded - for instance if somebody sent an entire SpamAssassin report back
5518 as a large number of 550 error lines. This bug was coincidentally fixed by
5519 increasing the size of one of Exim's internal buffers (big_buffer) that
5520 happened as part of the Exiscan merge. However, to be on the safe side, I
5521 have made the code more robust (and fixed the comments that describe what
5524 33. Some experimental protocols are using DNS PTR records for new purposes. The
5525 keys for these records are domain names, not reversed IP addresses. The
5526 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5527 leaves it alone. Component reversal etc. now happens only for IP addresses.
5530 34. The host_aton() function is supposed to be passed a string that is known
5531 to be a valid IP address. However, in the case of IPv6 addresses, it was
5532 not checking this. This is a hostage to fortune. Exim now panics and dies
5533 if the condition is not met. A case was found where this could be provoked
5534 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5535 components; fortuitously, this particular loophole had already been fixed
5536 by change 4.50/55 or 4.44/33 above.
5538 If there are any other similar loopholes, the new check in host_aton()
5539 itself should stop them being exploited. The report I received stated that
5540 data on the command line could provoke the exploit when Exim was running as
5541 exim, but did not say which command line option was involved. All I could
5542 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5543 running as the user.
5546 35. There was a buffer overflow vulnerability in the SPA authentication code
5547 (which came originally from the Samba project). I have added a test to the
5548 spa_base64_to_bits() function which I hope fixes it.
5551 36. The daemon start-up calls getloadavg() while still root for those OS that
5552 need the first call to be done as root, but it missed one case: when
5553 deliver_queue_load_max is set with deliver_drop_privilege. This is
5554 necessary for the benefit of the queue runner, because there is no re-exec
5555 when deliver_drop_privilege is set.
5557 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5558 was in use, was not putting the data itself into the right store pool;
5559 consequently, it could be overwritten for a subsequent message in the same
5560 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5563 38. Sometimes the final signoff response after QUIT could fail to get
5564 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5565 < 0 before doing a fflush(). This bug looks as though it goes back to the
5566 introduction of TLS in release 3.20, but "sometimes" must have been rare
5567 because the tests only now provoked it.
5573 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5574 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5575 Now it returns an integer. A number of calls were still expecting a T/F
5576 return. Fortuitously, in all cases, the tests worked in OK situations,
5577 which is the norm. However, things would have gone wrong on any write
5578 failures on the smtp file descriptor. This function is used when sending
5579 messages over SMTP and also when doing verify callouts.
5581 2. When Exim is called to do synchronous delivery of a locally submitted
5582 message (the -odf or -odi options), it no longer closes stderr before doing
5585 3. Implemented the mua_wrapper option.
5587 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5589 5. Implemented the functions header_remove(), header_testname(),
5590 header_add_at_position(), and receive_remove_recipient(), and exported them
5593 6. If an ACL "warn" statement specified the addition of headers, Exim already
5594 inserted X-ACL-Warn: at the start if there was no header name. However, it
5595 was not making this test for the second and subsequent header lines if
5596 there were newlines in the string. This meant that an invalid header could
5597 be inserted if Exim was badly configured.
5599 7. Allow an ACL "warn" statement to add header lines at the start or after all
5600 the Received: headers, as well as at the end.
5602 8. Added the rcpt_4xx retry error code.
5604 9. Added postmaster_mailfrom=xxx to callout verification option.
5606 10. Added mailfrom=xxxx to the callout verification option, for verify=
5609 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5610 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5612 12. Inserted some casts to stop certain compilers warning when using pointer
5613 differences as field lengths or precisions in printf-type calls (mostly
5614 affecting debugging statements).
5616 13. Added optional readline() support for -be (dynamically loaded).
5618 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5619 same clock tick as a message's arrival, so that its received time was the
5620 same as the "first fail" time on the retry record, and that message
5621 remained on the queue past the ultimate address timeout, every queue runner
5622 would try a delivery (because it was past the ultimate address timeout) but
5623 after another failure, the ultimate address timeout, which should have then
5624 bounced the address, did not kick in. This was a "< instead of <=" error;
5625 in most cases the first failure would have been in the next clock tick
5626 after the received time, and all would be well.
5628 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5629 being recognized when the domain list was tested by the match_domain
5630 condition in an expansion string.
5632 16. Added the ${str2b64: operator.
5634 17. Exim was always calling setrlimit() to set a large limit for the number of
5635 processes, without checking whether the existing limit was already
5636 adequate. (It did check for the limit on file descriptors.) Furthermore,
5637 errors from getrlimit() and setrlimit() were being ignored. Now they are
5638 logged to the main and panic logs, but Exim does carry on, to try to do its
5639 job under whatever limits there are.
5641 18. Imported PCRE 5.0.
5643 19. Trivial typo in log message " temporarily refused connection" (the leading
5646 20. If the log selector return_path_on_delivery was set and an address was
5647 redirected to /dev/null, the delivery process crashed because it assumed
5648 that a return path would always be set for a "successful" delivery. In this
5649 case, the whole delivery is bypassed as an optimization, and therefore no
5652 21. Internal re-arrangement: the function for sending a challenge and reading
5653 a response while authentication was assuming a zero-terminated challenge
5654 string. It's now changed to take a pointer and a length, to allow for
5655 binary data in such strings.
5657 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5659 23. Exim was not respecting finduser_retries when seeking the login of the
5660 uid under which it was called; it was always trying 10 times. (The default
5661 setting of finduser_retries is zero.) Also, it was sleeping after the final
5662 failure, which is pointless.
5664 24. Implemented tls_on_connect_ports.
5666 25. Implemented acl_smtp_predata.
5668 26. If the domain in control=submission is set empty, Exim assumes that the
5669 authenticated id is a complete email address when it generates From: or
5670 Sender: header lines.
5672 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5673 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5674 chown and chgrp in /bin and hostname in /usr/bin.
5676 28. Exim was keeping the "process log" file open after each use, just as it
5677 does for the main log. This opens the possibility of it remaining open for
5678 long periods when the USR1 signal hits a daemon. Occasional processlog
5679 errors were reported, that could have been caused by this. Anyway, it seems
5680 much more sensible not to leave this file open at all, so that is what now
5683 29. The long-running daemon process does not normally write to the log once it
5684 has entered its main loop, and it closes the log before doing so. This is
5685 so that log files can straightforwardly be renamed and moved. However,
5686 there are a couple of unusual error situations where the daemon does write
5687 log entries, and I had neglected to close the log afterwards.
5689 30. The text of an SMTP error response that was received during a remote
5690 delivery was being truncated at 512 bytes. This is too short for some of
5691 the long messages that one sometimes sees. I've increased the limit to
5694 31. It is now possible to make retry rules that apply only when a message has a
5695 specific sender, in particular, an empty sender.
5697 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5698 it possible to be selective about when SMTP synchronization is enforced.
5700 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5702 32. Implemented hosts_connection_nolog.
5704 33. Added an ACL for QUIT.
5706 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5709 35. Added mailbox_size and mailbox_filecount to appendfile.
5711 36. Added control = no_multiline_responses to ACLs.
5713 37. There was a bug in the logic of the code that waits for the clock to tick
5714 in the case where the clock went backwards by a substantial amount such
5715 that the microsecond fraction of "now" was more than the microsecond
5716 fraction of "then" (but the whole seconds number was less).
5718 38. Added support for the libradius Radius client library this is found on
5719 FreeBSD (previously only the radiusclient library was supported).
5725 1. When certain lookups returned multiple values in the form name=value, the
5726 quoting of the values was not always being done properly. Specifically:
5727 (a) If the value started with a double quote, but contained no whitespace,
5729 (b) If the value contained whitespace other than a space character (i.e.
5730 tabs or newlines or carriage returns) it was not quoted.
5731 This fix has been applied to the mysql and pgsql lookups by writing a
5732 separate quoting function and calling it from the lookup code. The fix
5733 should probably also be applied to nisplus, ibase and oracle lookups, but
5734 since I cannot test any of those, I have not disturbed their existing code.
5736 2. A hit in the callout cache for a specific address caused a log line with no
5737 reason for rejecting RCPT. Now it says "Previous (cached) callout
5738 verification failure".
5740 3. There was an off-by-one bug in the queryprogram router. An over-long
5741 return line was truncated at 256 instead of 255 characters, thereby
5742 overflowing its buffer with the terminating zero. As well as fixing this, I
5743 have increased the buffer size to 1024 (and made a note to document this).
5745 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5746 when Exim is waiting for an SMTP response from a remote server, Exim
5747 restarts its select() call on the socket, thereby resetting its timeout.
5748 This is not a problem when such interrupts are rare. Somebody set up a cron
5749 job to run exiwhat every 2 minutes, which is less than the normal select()
5750 timeout (5 or 10 minutes). This meant that the select() timeout never
5751 kicked in because it was always reset. I have fixed this by comparing the
5752 time when an interrupt arrives with the time at the start of the first call
5753 to select(). If more time than the timeout has elapsed, the interrupt is
5754 treated as a timeout.
5756 5. Some internal re-factoring in preparation for the addition of Sieve
5757 extensions (by MH). In particular, the "personal" test is moved to a
5758 separate function, and given an option for scanning Cc: and Bcc: (which is
5759 not set for Exim filters).
5761 6. When Exim created an email address using the login of the caller as the
5762 local part (e.g. when creating a From: or Sender: header line), it was not
5763 quoting the local part when it contained special characters such as @.
5765 7. Installed new OpenBSD configuration files.
5767 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5768 try to make them clearer.
5770 9. Callout options, other than the timeout value, were being ignored when
5771 verifying sender addresses in header lines. For example, when using
5773 verify = header_sender/callout=no_cache
5775 the cache was (incorrectly) being used.
5777 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5778 only the Cygwin environment.
5780 11. When return_path_on_delivery was set as a log selector, if different remote
5781 addresses in the same message used different return paths and parallel
5782 remote delivery occurred, the wrong values would sometimes be logged.
5783 (Whenever a remote delivery process finished, the return path value from
5784 the most recently started remote delivery process was logged.)
5786 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5787 lines when AUTH and/or TLS are in use. This is the "received protocol"
5788 field. Exim used to use "asmtp" for authenticated SMTP, without any
5789 indication (in the protocol name) for TLS use. Now it follows the RFC and
5790 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5791 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5792 names appear in log lines as well as in Received: header lines.
5794 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5795 extensions, and comparison tests, and to fix some bugs.
5797 14. Changes to the "personal" filter test:
5799 (1) The test was buggy in that it was just doing the equivalent of
5800 "contains" tests on header lines. For example, if a user's address was
5801 anne@some.where, the "personal" test would incorrectly be true for
5803 To: susanne@some.where
5805 This test is now done by extracting each address from the header in turn,
5806 and checking the entire address. Other tests that are part of "personal"
5807 are now done using regular expressions (for example, to check local parts
5808 of addresses in From: header lines).
5810 (2) The list of non-personal local parts in From: addresses has been
5811 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5812 taken from the Sieve specification recommendations.
5814 (3) If the message contains any header line starting with "List-" it is
5815 treated as non-personal.
5817 (4) The test for "circular" in the Subject: header line has been removed
5818 because it now seems ill-conceived.
5820 15. Minor typos in src/EDITME comments corrected.
5822 16. Installed latest exipick from John Jetmore.
5824 17. If headers_add on a router specified a text string that was too long for
5825 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5826 of string_sprintf() is now avoided.
5828 18. $message_body_size was not set (it was always zero) when running the DATA
5829 ACL and the local_scan() function.
5831 19. For the "mail" command in an Exim filter, no default was being set for
5832 the once_repeat time, causing a random time value to be used if "once" was
5833 specified. (If the value happened to be <= 0, no repeat happened.) The
5834 default is now 0s, meaning "never repeat". The "vacation" command was OK
5835 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5836 (I found it when inspecting the code).
5838 20. There is now an overall timeout for performing a callout verification. It
5839 defaults to 4 times the callout timeout, which applies to individual SMTP
5840 commands during the callout. The overall timeout applies when there is more
5841 than one host that can be tried. The timeout is checked before trying the
5842 next host. This prevents very long delays if there are a large number of
5843 hosts and all are timing out (e.g. when the network connections are timing
5844 out). The value of the overall timeout can be changed by specifying an
5845 additional sub-option for "callout", called "maxwait". For example:
5847 verify = sender/callout=5s,maxwait=20s
5849 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5850 to the end before writing, but this should make it even safer).
5852 22. Exim was forgetting that it had advertised PIPELINING for the second and
5853 subsequent messages on an SMTP connection. It was also not resetting its
5854 memory on STARTTLS and an internal HELO.
5856 23. When Exim logs an SMTP synchronization error within a session, it now
5857 records whether PIPELINING has been advertised or not.
5859 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5860 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5861 rather than long int.
5863 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5865 26. Added the never_mail option to autoreply.
5871 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5872 crash if the getsockname() call failed; this can happen if a connection is
5873 closed very soon after it is established. The problem was simply in the
5874 order in which certain operations were done, causing Exim to try to write
5875 to the SMTP stream before it had set up the file descriptor. The bug has
5876 been fixed by making things happen in the correct order.
5882 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5883 before the connection was closed, thus losing the rejection response.
5885 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5886 some early Solaris releases, but causes trouble in current releases where
5887 socklen_t is defined.
5889 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5892 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5895 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5896 that releasing the top of it at the end releases what was used for sub-
5897 expansions (unless the block got too big). However, discard this block if
5898 the first thing is a variable or header, so that we can use its block when
5899 it is dynamic (useful for very large $message_headers, for example).
5901 6. Lookups now cache *every* query, not just the most recent. A new, separate
5902 store pool is used for this. It can be recovered when all lookup caches are
5903 flushed. Lookups now release memory at the end of their result strings.
5904 This has involved some general refactoring of the lookup sources.
5906 7. Some code has been added to the store_xxx() functions to reduce the amount
5907 of flapping under certain conditions.
5909 8. log_incoming_interface used to affect only the <= reception log lines. Now
5910 it causes the local interface and port to be added to several more SMTP log
5911 lines, for example "SMTP connection from", and rejection lines.
5913 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5915 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5917 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5918 could be overwritten at the end of the current message (or the start of a
5919 new message if it was set in a HELO ACL). The value is now preserved for
5920 the duration of the SMTP connection.
5922 12. If a transport had a headers_rewrite setting, and a matching header line
5923 contained an unqualified address, that address was qualified, even if it
5924 did not match any rewriting rules. The underlying bug was that the values
5925 of the flags that permit the existence of unqualified sender and recipient
5926 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5927 non-local messages, and by -bnq for local messages) were not being
5928 preserved with the message after it was received.
5930 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5931 "next input=" as part of the text comprising the host identity instead of
5932 the correct text. The code was using the same buffer for two different
5933 strings. However, depending on which order the printing function evaluated
5934 its arguments, the bug did not always show up. Under Linux, for example, my
5935 test suite worked just fine.
5937 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5938 doesn't work with some older versions of Perl. It has been changed to "my",
5939 which in any case is probably the better facility to use.
5941 15. A really picky compiler found some instances of statements for creating
5942 error messages that either had too many or two few arguments for the format
5945 16. The size of the buffer for calls to the DNS resolver has been increased
5946 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5947 for addresses that have a lot of PTR records. This alleviates a problem; it
5948 does not fully solve it.
5950 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5951 buffer now truncates the list and logs the incident, which is the same
5952 action as happens when Exim is looking up a host name and its aliases.
5953 Previously in this situation something unpredictable would happen;
5954 sometimes it was "internal error: store_reset failed".
5956 18. If a server dropped the connection unexpectedly when an Exim client was
5957 using GnuTLS and trying to read a response, the client delivery process
5958 crashed while trying to generate an error log message.
5960 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5961 string, for example:
5963 warn message = H1: something\nH2: something
5965 the text was added as a single header line from Exim's point of view
5966 though it ended up OK in the delivered message. However, searching for the
5967 second and subsequent header lines using $h_h2: did not work. This has been
5968 fixed. Similarly, if a system filter added multiple headers in this way,
5969 the routers could not see them.
5971 20. Expanded the error message when iplsearch is called with an invalid key to
5972 suggest using net-iplsearch in a host list.
5974 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5975 ACLs are no longer actually imposed (and a message to that effect is
5978 22. If a "gecos" field in a passwd entry contained escaped characters, in
5979 particular, if it contained a \" sequence, Exim got it wrong when building
5980 a From: or a Sender: header from that name. A second bug also caused
5981 incorrect handling when an unquoted " was present following a character
5982 that needed quoting.
5984 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5985 was not being matched caselessly.
5987 24. Arranged for all hyphens in the exim.8 source to be escaped with
5990 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5991 properly. Recipient callout cache records were still being keyed to include
5992 the sender, even when use_sender was set false. This led to far more
5993 callouts that were necessary. The sender is no longer included in the key
5994 when use_sender is false.
5996 26. Added "control = submission" modifier to ACLs.
5998 27. Added the ${base62d: operator to decode base 62 numbers.
6000 28. dnsdb lookups can now access SRV records.
6002 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6003 the configuration file.
6005 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6006 (-v) mode. This makes the output for a verbose queue run more intelligible.
6008 31. Added a use_postmaster feature to recipient callouts.
6010 32. Added the $body_zerocount variable, containing the number of binary zero
6011 bytes in the message body.
6013 33. The time of last modification of the "new" subdirectory is now used as the
6014 "mailbox time last read" when there is a quota error for a maildir
6017 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6019 35. Added +ignore_unknown as a special item in host lists.
6021 36. Code for decoding IPv6 addresses in host lists is now included, even if
6022 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6023 address was recognized as an IP address, but was then not correctly decoded
6024 into binary, causing unexpected and incorrect effects when compared with
6031 1. Very minor rewording of debugging text in manualroute to say "list of
6032 hosts" instead of "hostlist".
6034 2. If verify=header_syntax was set, and a header line with an unqualified
6035 address (no domain) and a large number of spaces between the end of the
6036 name and the colon was received, the reception process suffered a buffer
6037 overflow, and (when I tested it) crashed. This was caused by some obsolete
6038 code that should have been removed. The fix is to remove it!
6040 3. When running in the test harness, delay a bit after writing a bounce
6041 message to get a bit more predictability in the log output.
6043 4. Added a call to search_tidyup() just before forking a reception process. In
6044 theory, someone could use a lookup in the expansion of smtp_accept_max_
6045 per_host which, without the tidyup, could leave open a database connection.
6047 5. Added the variables $recipient_data and $sender_data which get set from a
6048 lookup success in an ACL "recipients" or "senders" condition, or a router
6049 "senders" option, similar to $domain_data and $local_part_data.
6051 6. Moved the writing of debug_print from before to after the "senders" test
6054 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6055 problems for message scanning, either using a data ACL, or using
6056 local_scan() because the Received: header was not generated till after they
6057 were called (in order to set the time as the time of reception completion).
6058 I have revised the way this works. The header is now generated after the
6059 body is received, but before the ACL or local_scan() are called. After they
6060 are run, the timestamp in the header is updated.
6066 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6067 before starting a queue runner without re-exec. This happened only when
6068 deliver_drop_privilege was set or when the Exim user was set to root. The
6069 effect of the bug was that timeouts during subsequent deliveries caused
6070 crashes instead of being properly handled. The handler is now left at its
6071 default (and expected) setting.
6073 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6074 message, again when deliver_drop_privilege is set or Exim is run as root.
6075 The bug described in (1) was not present in this case, but the tidying up
6076 of the other signals was missing. I have made the two cases consistent.
6078 3. The ignore_target_hosts setting on a manualroute router was being ignored
6079 for hosts that were looked up using the /MX notation.
6081 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6084 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6085 operated on the sender address. After changing the $sender_address to <>
6086 for the sender address verify, Exim was re-instated it as the original
6087 (before rewriting) address, but remembering that it had rewritten it, so it
6088 wasn't rewriting it again. This bug also had the effect of breaking the
6089 sender address verification caching when the sender address was rewritten.
6091 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6092 This has been changed so that if the ip literal address matches
6093 ignore_target_hosts, the router declines.
6095 7. Added expansion conditions match_domain, match_address, and match_local_
6096 part (NOT match_host).
6098 8. The placeholder for the Received: header didn't have a length field set.
6100 9. Added code to Exim itself and to exim_lock to test for a specific race
6101 condition that could lead to file corruption when using MBX delivery. The
6102 issue is with the lockfile that is created in /tmp. If this file is removed
6103 after a process has opened it but before that process has acquired a lock,
6104 there is the potential for a second process to recreate the file and also
6105 acquire a lock. This could lead to two Exim processes writing to the file
6106 at the same time. The added code performs the same test as UW imapd; it
6107 checks after acquiring the lock that its file descriptor still refers to
6108 the same named file.
6110 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6111 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6114 11. Added the smtp_active_hostname option. If used, this will typically be made
6115 to depend on the incoming interface address. Because $interface_address is
6116 not set up until the daemon has forked a reception process, error responses
6117 that can happen earlier (such as "too many connections") no longer contain
6120 12. If an expansion in a condition on a "warn" statement fails because a lookup
6121 defers, the "warn" statement is abandoned, and the next ACL statement is
6122 processed. Previously this caused the whole ACL to be aborted.
6124 13. Added the iplsearch lookup type.
6126 14. Added ident_timeout as a log selector.
6128 15. Added tls_certificate_verified as a log selector.
6130 16. Added a global option tls_require_ciphers (compare the smtp transport
6131 option of the same name). This controls incoming TLS connections.
6133 17. I finally figured out how to make tls_require_ciphers do a similar thing
6134 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6135 before starting the TLS session.
6137 18. Tabs are now shown as \t in -bP output.
6139 19. If the log selector return_path_on_delivery was set, Exim crashed when
6140 bouncing a message because it had too many Received: header lines.
6142 20. If two routers both had headers_remove settings, and the first one included
6143 a superfluous trailing colon, the final name in the first list and the
6144 first name in the second list were incorrectly joined into one item (with a
6145 colon in the middle).
6151 1. Added -C and -D options to the exinext utility, mainly to make it easier
6152 to include in the automated testing, but these could be helpful when
6153 multiple configurations are in use.
6155 2. The exinext utility was not formatting the output nicely when there was
6156 an alternate port involved in the retry record key, nor when there was a
6157 message id as well (for retries that were specific to a specific message
6158 and a specific host). It was also confused by IPv6 addresses, because of
6159 the additional colons they contain. I have fixed the IPv4 problem, and
6160 patched it up to do a reasonable job for IPv6.
6162 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6163 delivery, the log line now contains "pipelined" if PIPELINING was used.
6165 4. An SMTP transport process used to panic and die if the bind() call to set
6166 an explicit outgoing interface failed. This has been changed; it is now
6167 treated in the same way as a connect() failure.
6169 5. A reference to $sender_host_name in the part of a conditional expansion
6170 that was being skipped was still causing a DNS lookup. This no longer
6173 6. The def: expansion condition was not recognizing references to header lines
6174 that used bh_ and bheader_.
6176 7. Added the _cache feature to named lists.
6178 8. The code for checking quota_filecount in the appendfile transport was
6179 allowing one more file than it should have been.
6181 9. For compatibility with Sendmail, the command line option
6189 and sets the incoming protocol and host name (for trusted callers). The
6190 host name and its colon can be omitted when only the protocol is to be set.
6191 Note the Exim already has two private options, -pd and -ps, that refer to
6192 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6193 "s", but I don't think that's a major issue.
6195 10. A number of refactoring changes to the code, none of which should affect
6198 (a) The number of logging options was getting close to filling up the
6199 32-bit word that was used as a bit map. I have split them into two classes:
6200 those that are passed in the argument to log_write(), and those that are
6201 only ever tested independently outside of that function. These are now in
6202 separate 32-bit words, so there is plenty of room for expansion again.
6203 There is no change in the user interface or the logging behaviour.
6205 (b) When building, for example, log lines, the code previously used a
6206 macro that called string_cat() twice, in order to add two strings. This is
6207 not really sufficiently general. Furthermore, there was one instance where
6208 it was actually wrong because one of the argument was used twice, and in
6209 one call a function was used. (As it happened, calling the function twice
6210 did not affect the overall behaviour.) The macro has been replaced by a
6211 function that can join an arbitrary number of extra strings onto a growing
6214 (c) The code for expansion conditions now uses a table and a binary chop
6215 instead of a serial search (which was left over from when there were very
6216 few conditions). Also, it now recognizes conditions like "pam" even when
6217 the relevant support is not compiled in: a suitably worded error message is
6218 given if an attempt is made to use such a condition.
6220 11. Added ${time_interval:xxxxx}.
6222 12. A bug was causing one of the ddress fields not to be passed back correctly
6223 from remote delivery subprocesses. The field in question was not being
6224 subsequently used, so this caused to problems in practice.
6226 13. Added new log selectors queue_time and deliver_time.
6228 14. Might have fixed a bug in maildirsizefile handling that threw up
6229 "unexpected character" debug warnings, and recalculated the data
6230 unnecessarily. In any case, I expanded the warning message to give more
6233 15. Added the message "Restricted characters in address" to the statements in
6234 the default ACL that block characters like @ and % in local parts.
6236 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6237 Three changes have been made:
6239 (a) There was a serious bug; a negative response to MAIL caused the whole
6240 recipient domain to be cached as invalid, thereby blocking all messages
6241 to all local parts at the same domain, from all senders. This bug has
6242 been fixed. The domain is no longer cached after a negative response to
6243 MAIL if the sender used is not empty.
6245 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6248 (c) A new callout option, "use_sender" has been added for people who want
6249 the modified behaviour.
6255 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6258 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6259 indeed breaks things for older releases.
6261 3. Added additional logging to the case where there is a problem reading data
6262 from a filter that is running in a subprocess using a pipe, in order to
6263 try to track down a specific problem.
6265 4. Testing facility fudge: when running in the test harness and attempting
6266 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6267 getting "No route to host". Convert this to a timeout.
6269 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6272 6. Some OS don't have socklen_t but use size_t instead. This affects the
6273 fifth argument of getsockopt() amongst other things. This is now
6274 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6275 can be set for individual OS. I have set it for SunOS5, OSF1, and
6276 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6277 some earlier ones do not.
6279 7. Change 4.30/15 was not doing the test caselessly.
6281 8. The standard form for an IPv6 address literal was being rejected by address
6282 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6283 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6284 this, as well as the form without the "IPv6" on the front (but only when
6285 address literals are enabled, of course).
6287 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6289 10. Exim crashed if a message with an empty sender address specified by -f
6290 encountered a router with an errors_to setting. This could be provoked only
6291 by a command such as
6295 where an empty string was supplied; "<>" did not hit this bug.
6297 11. Installed PCRE release 4.5.
6299 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6300 remained set. It is now erased.
6302 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6303 times from message ids (which are base 36 rather than the normal 62).
6305 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6306 were being counted as actual protocol errors, and logged if the log
6307 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6308 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6309 and DATA following a set of rejected RCPTs do not count as protocol errors.
6310 In other words, Exim assumes they were pipelined, though this may not
6311 actually be the case. Of course, in all cases the client gets an
6312 appropriate error code.
6314 15. If a lookup fails in an ACL condition, a message about the failure may
6315 be available; it is used if testing the ACL cannot continue, because most
6316 such messages specify what the cause of the deferral is. However, some
6317 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6318 that caused an old message to be retained and used if a later statement
6319 caused a defer, replacing the real cause of the deferral.
6321 16. If an IP address had so many PTR records that the DNS lookup buffer
6322 was not large enough to hold them, Exim could crash while trying to process
6323 the truncated data. It now detects and logs this case.
6325 17. Further to 4.21/58, another change has been made: if (and only if) the
6326 first line of a message (the first header line) ends with CRLF, a bare LF
6327 in a subsequent header line has a space inserted after it, so as not to
6328 terminate the header.
6330 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6331 unnecessarily, used atoi() instead of strtol(), and didn't check the
6332 termination when getting file sizes from file names by regex.
6334 19. Completely re-implemented the support for maildirsize files, in the light
6335 of a number of problems with the previous contributed implementation
6336 (4.30/29). In particular:
6338 . If the quota is zero, the maildirsize file is maintained, but no quota is
6341 . If the maildir directory does not exist, it is created before any attempt
6342 to write a maildirsize file.
6344 . The quota value in the file is just a cache; if the quota is changed in
6345 the transport, the new value overrides.
6347 . A regular expression is available for excluding directories from the
6350 20. The autoreply transport checks the characters in options that define the
6351 message's headers; it allows continued headers, but it was checking with
6352 isspace() after an embedded newline instead of explicitly looking for a
6355 21. If all the "regular" hosts to which an address was routed had passed their
6356 expiry times, and had not reached their retry times, the address was
6357 bounced, even if fallback hosts were defined. Now Exim should go on to try
6360 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6361 equivalent code in the SMTP transport. Some hosts send humungous responses
6362 to HELO/EHLO, more than 1024 it seems.
6364 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6365 gives compiler warnings in some environments. I've now done it "properly",
6368 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6369 (because of problems with the built-in one) was declared to return uschar *
6370 instead of char *, causing compiler failure.
6372 25. Fixed a file descriptor leak when processing alias/forward files.
6374 26. Fixed a minor format string issue in dbfn.c.
6376 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6378 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6379 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6382 29. When a sender address is verified, it is cached, to save repeating the test
6383 when there is more than one recipient in a message. However, when the
6384 verification involves a callout, it is possible for different callout
6385 options to be set for different recipients. It is too complicated to keep
6386 track of this in the cache, so now Exim always runs a verification when a
6387 callout is required, relying on the callout cache for the optimization.
6388 The overhead is duplication of the address routing, but this should not be
6391 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6392 to be verified with callout=postmaster, and the main callout worked but the
6393 postmaster check failed, the verification correctly failed. However, if a
6394 subsequent RCPT command asked for sender verification *without* the
6395 postmaster check, incorrect caching caused this verification also to fail,
6398 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6399 it was not caching the DNS options (qualify_single, search_parents) that
6400 were used when the lookup failed. A subsequent lookup with different
6401 options therefore always gave the same answer, though there were cases
6402 where it should not have. (Example: a "domains = !$mx_any" option on a
6403 dnslookup router: the "domains" option is always processed without any
6404 widening, but the router might have qualify_single set.) Now Exim uses the
6405 cached value only when the same options are set.
6407 32. Added John Jetmore's "exipick" utility to the distribution.
6409 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6410 than a timeout (e.g. a certificate is required, and is not provided), an
6411 Exim server now closes the connection immediately. Previously it waited for
6412 the client to close - but if the client is SSL, it seems that they each
6413 wait for each other, leading to a delay before one of them times out.
6415 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6416 maintained 0.8.x compatibility because I don't think many are using it, and
6417 it is clearly obsolete.
6419 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6422 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6423 client certificate was expired. A simple patch fixes this, though I don't
6424 understand the full logic of why the verify callback is called multiple
6427 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6428 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6429 which causes problems with some clients (such as the Certicom SSL Plus
6430 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6431 disables the coutermeasure allowing Eudora to connect."
6433 38. Exim was not checking that a write() to a log file succeeded. This could
6434 lead to Bad Things if a log got too big, in particular if it hit a file
6435 size limit. Exim now panics and dies if it cannot write to a log file, just
6436 as it does if it cannot open a log file.
6438 39. Modified OS/Makefile-Linux so that it now contains
6440 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6442 The two -D definitions ensure that Exim is compiled with large file
6443 support, which makes it possible to handle log files that are bigger than
6446 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6447 instance) a domain was checked against a named list that involved a lookup,
6448 causing $domain_data to be set, then another domain was checked against the
6449 same list, then the first domain was re-checked, the value of $domain_data
6450 after the final check could be wrong. In particular, if the second check
6451 failed, it could be set empty. This bug probably also applied to
6454 41. The strip_trailing_dot option was not being applied to the address given
6455 with the -f command-line option.
6457 42. The code for reading a message's header from the spool was incrementing
6458 $received_count, but never initializing it. This meant that the value was
6459 incorrect (doubled) while delivering a message in the same process in which
6460 it was received. In the most common configuration of Exim, this never
6461 happens - a fresh exec is done - but it can happen when
6462 deliver_drop_privilege is set.
6464 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6465 it now includes up to 150 characters of the unexpected data in the log
6468 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6469 and building data strings. The size of both of these buffers was 10 000
6470 bytes - far larger than anybody would *ever* want, thought I. Needless to
6471 say, somebody hit the limit. I have increased the maximum line length to
6472 20 000 and the maximum data length of concatenated lines to 100 000. I have
6473 also fixed two bugs, because there was no checking on these buffers. Tsk,
6474 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6475 buffer is too small.
6477 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6478 lsearch lookups. Now it does.
6480 46. When parsing a route_list item in a manualroute router, a fixed-length
6481 buffer was used for the list of hosts. I made this 1024 bytes long,
6482 thinking that nobody would ever have a list of hosts that long. Wrong.
6483 Somebody had a whole pile of complicated expansion conditions, and the
6484 string was silently truncated, leading to an expansion error. It turns out
6485 that it is easier to change to an unlimited length (owing to other changes
6486 that have happened since this code was originally written) than to build
6487 structure for giving a limitation error. The length of the item that
6488 expands into the list of hosts is now unlimited.
6490 47. The lsearch lookup could not handle data where the length of text line was
6491 more than 4095 characters. Such lines were truncated, leading to shortened
6492 data being returned. It should now handle lines of any length.
6494 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6495 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6498 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6499 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6500 no longer happens in comment lines. A list of replacements is now placed
6501 at the head of all of the source files, except those whose only change is
6502 to replace PERL_COMMAND in the very first #! line.
6504 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6505 messages on the queue, with a bottom-up merge sort, using code contributed
6506 by Michael Haardt. This should make operations like -bp somewhat faster on
6507 large queues. It won't affect queue runners, except when queue_run_in_order
6510 51. Installed eximstats 1.31 in the distribution.
6512 52. Added support for SRV lookups to the dnslookup router.
6514 53. If an ACL referred to $message_body or $message_body_end, the value was not
6515 reset for any messages that followed in the same SMTP session.
6517 54. The store-handling optimization for building very long strings was not
6518 differentiating between the different store pools. I don't think this
6519 actually made any difference in practice, but I've tidied it.
6521 55. While running the routers to verify a sender address, $sender_address
6522 was still set to the sender address. This is wrong, because when routing to
6523 send a bounce to the sender, it would be empty. Therefore, I have changed
6524 it so that, while verifying a sender address, $sender_address is set to <>.
6525 (There is no change to what happens when verifying a recipient address.)
6527 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6528 target A or AAAA records (if not already returned) without resetting the
6529 qualify_single or search_parents options of the DNS resolver. These are
6530 inappropriate in this case because the targets of MX and SRV records must
6531 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6532 target that, when qualified, matched something in the local domain. These
6533 two options are now turned off when doing these lookups.
6535 57. It seems that at least some releases of Reiserfs (which does not have the
6536 concept of a fixed number of inodes) returns zero and not -1 for the
6537 number of available inodes. This interacted badly with check_spool_inodes,
6538 which assumed that -1 was the "no such thing" setting. What I have done is
6539 to check that the total number of inodes is greater than zero before doing
6540 the test of how many are available.
6542 58. When a "warn" ACL statement has a log_message modifier, the message is
6543 remembered, and not repeated. This is to avoid a lot of repetition when a
6544 message has many recipients that cause the same warning to be written.
6545 However, Exim was preserving the list of already written lines for an
6546 entire SMTP session, which doesn't seem right. The memory is now reset if a
6547 new message is started.
6549 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6550 debugging output unless log_rewrite was also set.
6552 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6553 of (int)(handle) when we know that handle contains (void *)(-1).
6555 61. The Exim daemon panic-logs an error return when it closes the incoming
6556 connection. However "connection reset by peer" seems to be common, and
6557 isn't really an error worthy of noting specially, so that particular error
6560 62. When Exim is trying to find all the local interfaces, it used to panic and
6561 die if the ioctl to get the interface flags failed. However, it seems that
6562 on at least one OS (Solaris 9) it is possible to have an interface that is
6563 included in the list of interfaces, but for which you get a failure error
6564 for this call. This happens when the interface is not "plumbed" into a
6565 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6566 failure of the "get flags" call assumes that the interface is down.
6568 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6569 makes life easier for people who are doing arithmetic on fields extracted
6570 from dates, where you often get leading zeros that should not be
6571 interpreted as octal.
6573 64. Added qualify_domain to the redirect router, to override the global
6576 65. If a pathologically long header line contained very many addresses (the
6577 report of this problem mentioned 10 000) and each of them was rewritten,
6578 Exim could use up a very large amount of memory. (It kept on making new
6579 copies of the header line as it rewrote, and never released the old ones.)
6580 At the expense of a bit more processing, the header rewriting function has
6581 been changed so that it no longer eats memory in this way.
6583 66. The generation of the Received: header has been moved from the time that a
6584 message starts to be received, to the time that it finishes. The timestamp
6585 in the Received: header should now be very close to that of the <= log
6586 line. There are two side-effects of this change:
6588 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6589 logged header lines no longer include the local Received: line, because
6590 it has not yet been created. The same applies to a copy of the message
6591 that is returned to a non-SMTP sender when a message is rejected.
6593 (b) When a filter file is tested using -bf, no additional Received: header
6594 is added to the test message. After some thought, I decided that this
6597 This change does not affect the value of $received_for. It is still set
6598 after address rewriting, but before local_scan() is called.
6600 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6602 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6603 gave an unhelpful panic error message, and a defer error. I have managed to
6604 change this behaviour so that it now rejects any supplied certificate,
6605 which seems right, as the list of acceptable certificates is empty.
6607 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6608 gave an unhelpful defer error. I have not managed to make this reject any
6609 supplied certificates, but the error message it gives is "no certificate
6610 supplied", which is not helpful.
6612 70. exigrep's output now also includes lines that are not associated with any
6613 message, but which match the given pattern. Implemented by a patch from
6614 Martin Sluka, which also tidied up the Perl a bit.
6616 71. Recipient callout verification, like sender verification, was using <> in
6617 the MAIL FROM command. This isn't really the right thing, since the actual
6618 sender may affect whether the remote host accepts the recipient or not. I
6619 have changed it to use the actual sender in the callout; this means that
6620 the cache record is now keyed on a recipient/sender pair, not just the
6621 recipient address. There doesn't seem to be a real danger of callout loops,
6622 since a callout by the remote host to check the sender would use <>.
6623 [SEE ABOVE: changed after hitting problems.]
6625 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6626 temporary errors. However, in the case of such a code being given after
6627 the end of a data transmission (i.e. after ".") Exim was failing to write
6628 a retry record for the message. (Yes, there was some broken host that was
6629 actually sending 8xx at this point.)
6631 73. An unknown lookup type in a host list could cause Exim to panic-die when
6632 the list was checked. (An example that provoked this was putting <; in the
6633 middle of a list instead of at the start.) If this happened during a DATA
6634 ACL check, a -D file could be left lying around. This kind of configuration
6635 error no longer causes Exim to die; instead it causes a defer error. The
6636 incident is still logged to the main and panic logs.
6638 74. Buglet left over from Exim 3 conversion. The message "too many messages
6639 in one connection" was written to the rejectlog but not the mainlog, except
6640 when address rewriting (yes!) was being logged.
6642 75. Added write_rejectlog option.
6644 76. When a system filter was run not as root (that is, when system_filter_user
6645 was set), the values of the $n variables were not being returned to the
6646 main process; thus, they were not subsequently available in the $sn
6649 77. Added +return_path_on_delivery log selector.
6651 78. A connection timeout was being treated differently from recipients deferred
6652 when testing hosts_max_try with a message that was older than the host's
6653 retry timeout. (The host should not be counted, thus allowing all hosts to
6654 be tried at least once before bouncing.) This may have been the cause of an
6655 occasionally reported bug whereby a message would remain on the queue
6656 longer than the retry timeout, but would be bounced if a delivery was
6657 forced. I say "may" because I never totally pinned down the problem;
6658 setting up timeout/retry tests is difficult. See also the next item.
6660 79. The ultimate address timeout was not being applied to errors that involved
6661 a combination of host plus message (for example, a timeout on a MAIL
6662 command). When an address resolved to a number of possible hosts, and they
6663 were not all tried for each delivery (e.g. because of hosts_max_try), a
6664 message could remain on the queue longer than the retry timeout.
6666 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6669 81. Fixed an obscure SMTP outgoing bug which required at least the following
6670 conditions: (a) there was another message waiting for the same server;
6671 (b) the server returned 5xx to all RCPT commands in the first message so
6672 that the message was not completed; (c) the server dropped the connection
6673 or gave a negative response to the RSET that Exim sends to abort the
6674 transaction. The observed case was a dropped connection after DATA that had
6675 been sent in pipelining mode. That is, the server had advertised PIPELINING
6676 but was not implementing it correctly. The effect of the bug was incorrect
6677 behaviour, such as trying another host, and this could lead to a crash.
6683 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6684 and daemon.c were passed as pointers to ints; they should have been
6685 pointers to socklen_t variables (which are typically unsigned ints).
6687 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6690 3. Fixed a really odd bug that affected only the testing scheme; patching a
6691 certain fixed string in the binary changed the value of another string that
6692 happened to be identical to the end of the original first string.
6694 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6695 name", it returns that address as the IP address. On some operating
6696 systems (e.g. Solaris), it also passes back the IP address string as the
6697 "host name". However, on others (e.g. Linux), it passes back an empty
6698 string. Exim wasn't checking for this, and was changing the host name to an
6699 empty string, assuming it had been canonicalized.
6701 5. Although rare, it is permitted to have more than one PTR record for a given
6702 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6703 all the names associated with an address, because they do in Solaris.
6704 However, it seems that they do not in Linux for data that comes from the
6705 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6706 I found this out when I moved to a new Linux workstation and tried to run
6707 the Exim test suite.
6709 To get round this problem I have changed the code so that it now does its
6710 own call to the DNS to look up PTR records when searching for a host name.
6711 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6712 addresses that are only in /etc/hosts are still found.
6714 This behaviour is, however, controlled by an option called host_lookup_
6715 order, which defaults to "bydns:byaddr". If people want to use the other
6716 order, or indeed, just use one or the other means of lookup, they can
6717 specify it in this variable.
6719 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6720 some operating systems, this comes back from gethostbyaddr() as an empty
6721 string, and this is what Exim used to test for. However, it seems that in
6722 other systems, "." is yielded. Exim now tests for this case too.
6724 7. The values of check_spool_space and check_log_space are now held internally
6725 as a number of kilobytes instead of an absolute number of bytes. If a
6726 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6727 kilobyte. This means that much larger values can be stored.
6729 8. Exim monitor: an attempt to get the action menu when not actually pointing
6730 at a message produces an empty menu entitled "No message selected". This
6731 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6732 no entries in it ("Shell widget menu has zero width and/or height"). So I
6733 have added a single, blank menu entry in this case.
6735 9. Added ${quote_local_part.
6737 10. MIME decoding is now applied to the contents of Subject: header lines when
6740 11. Now that a reference to $sender_host_address automatically causes a reverse
6741 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6742 host lookup before query-style lookups in lists that might use this
6743 variable. This has therefore been abolished, and the "net-" prefix is no
6744 longer necessary for query-style lookups.
6746 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6747 have been a typo for LFLAGS, so it has been changed.
6749 13. The install script calls Exim with "-C /dev/null" in order to find the
6750 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6751 to be output. However, since Exim outputs its version number before the
6752 error, it didn't break the script. It just looked ugly. I fixed this by
6753 always allowing "-C /dev/null" if the caller is root.
6755 14. Ignore overlarge ACL variable number when reading spool file - insurance
6756 against a later release with more variables having written the file.
6758 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6759 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6760 this, as well as the form without the "IPv6" on the front.
6762 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6763 OS/Makefile-Darwin file.
6765 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6766 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6768 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6769 variable. However, some OS use ints for inodes. I've added cast to long int
6770 to get rid of the compiler warning.
6772 19. I had forgotten to lock out "/../" in configuration file names when
6773 ALT_CONFIG_PREFIX was set.
6775 20. Routers used for verification do not need to specify transports. However,
6776 if such a router generated a host list, and callout was configured, Exim
6777 crashed, because it could not find a port number from the (non-existent)
6778 transport. It now assumes port 25 in this circumstance.
6780 21. Added the -t option to exigrep.
6782 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6783 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6784 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6785 them is set, LOOKUP_LSEARCH is forced.
6787 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6789 24. Added sender and host information to the "rejected by local_scan()" log
6790 line; previously there was no indication of these.
6792 25. Added .include_if_exists.
6794 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6795 Linux. It turns out that not all file systems support this. Apparently some
6796 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6797 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6798 not supported on the file descriptor, is now ignored when Exim is trying to
6799 sync a directory. This applies only to Linux.
6801 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6803 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6804 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6807 29. Added support for maildirsize files from supplied patch (modified a bit).
6809 30. The use of :fail: followed by an empty string could lead Exim to respond to
6810 sender verification failures with (e.g.):
6812 550 Verification failed for <xxx>
6813 550 Sender verify failed
6815 where the first response line was missing the '-' that indicates it is not
6816 the final line of the response.
6818 31. The loop for finding the name of the user that called Exim had a hardwired
6819 limit of 10; it now uses the value of finduser_retries, which is used for
6820 all other user lookups.
6822 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6825 33. Exim was neglecting to zero errno before one call of strtol() when
6826 expanding a string and expecting an integer value. On some systems this
6827 resulted in spurious "integer overflow" errors. Also, it was casting the
6828 result into an int without checking.
6830 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6831 did not work. The code looks as if it has *never* worked, though it appears
6832 to have been documented since at least release 1.62. I have made it work.
6834 35. The "timeout_DNS" error in retry rules, also documented since at least
6835 1.62, also never worked. As it isn't clear exactly what this means, and
6836 clearly it isn't a major issue, I have abolished the feature by treating it
6837 as "timeout", and writing a warning to the main and panic logs.
6839 36. The display of retry rules for -brt wasn't always showing the error code
6842 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6843 timeout_connect_A, timeout_connect_MX.
6845 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6846 to the empty sender.
6848 39. The daemon was not analysing the content of -oX till after it had closed
6849 stderr and disconnected from the controlling terminal. This meant that any
6850 syntax errors were only noted on the panic log, and the return code from
6851 the command was 0. By re-arranging the code a little, I've made the
6852 decoding happen first, so such errors now appear on stderr, and the return
6853 code is 1. However, the actual setting up of the sockets still happens in
6854 the disconnected process, so errors there are still only recorded on the
6857 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6858 connections (as happens on some IP stacks) was logged at start up time as
6859 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6860 it from "IPv6 and IPv4", which means that two separate sockets are being
6863 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6864 says whether AF_INET or AF_INET6 was passed as an argument.
6866 42. Exiwhat output was messed up when time zones were included in log
6869 43. Exiwhat now gives more information about the daemon's listening ports,
6870 and whether -tls-on-connect was used.
6872 44. The "port" option of the smtp transport is now expanded.
6874 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6875 silently ignored. Now an error message is written to the main and panic
6878 46. There's a new ACL modifier called "logwrite" which writes to a log file
6879 as soon as it is encountered.
6881 47. Added $local_user_uid and $local_user_gid at routing time.
6883 48. Exim crashed when trying to verify a sender address that was being
6886 49. Exim was recognizing only a space character after ".include". It now also
6887 recognizes a tab character.
6889 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6890 extracting the relevant information from the specification. The man page no
6891 longer contains scrambled data for the -d option, and I've added a section
6892 at the front about calling Exim under different names.
6894 51. Added "extra_headers" argument to the "mail" command in filter files.
6896 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6899 53. Installed eximstats 1.29.
6901 54. Added transport_filter_timeout as a generic transport option.
6903 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6904 Cc: header lines. This was required by RFC 822, but it not required by RFC
6907 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6908 incoming messages that did not have them. Now it does so only if the
6909 message originates locally, that is, if there is no associated remote host
6910 address. When Resent- header lines are present, this applies to the Resent-
6911 lines rather than the non-Resent- lines.
6913 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6914 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6916 58. Messages for configuration errors now include the name of the main
6917 configuration file - useful now that there may be more than one file in a
6918 list (.included file names were always shown).
6920 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6921 for those rare installations that do not start the daemon as root or run it
6922 setuid root. I've cut out the call to initgroups() if the daemon is not
6925 60. The Exim user and group can now be bound into the binary as text strings
6926 that are looked up at the start of Exim's processing.
6928 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6930 62. Added $mailstore_basename variable.
6932 63. Installed patch to sieve.c from Michael Haardt.
6934 64. When Exim failed to open the panic log after failing to open the main log,
6935 the original message it was trying to log was written to stderr and debug
6936 output, but if they were not available (the usual case in production), it
6937 was lost. Now it is written to syslog before the two lines that record the
6938 failures to open the logs.
6940 65. Users' Exim filters run in subprocesses under the user's uid. It is
6941 possible for a "deliver" command or an alias in a "personal" command to
6942 provoke an address rewrite. If logging of address rewriting is configured,
6943 this fails because the process is not running as root or exim. There may be
6944 a better way of dealing with this, but for the moment (because 4.30 needs
6945 to be released), I have disabled address rewrite logging when running a
6946 filter in a non-root, non-exim process.
6952 1. The buildconfig auxiliary program wasn't quoting the value set for
6953 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6954 not defined. This bug was masked in 4.22 by the effect that was fixed in
6957 2. Some messages that were rejected after a message id was allocated were
6958 shown as "incomplete" by exigrep. It no longer does this for messages that
6959 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6961 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6962 have allow_domain_literals set, the ID did not get logged in the <= line.
6963 Domain literals are now always recognized in Message-ID: header lines.
6965 4. The first argument for a ${extract expansion item is the key name or field
6966 number. Leading and trailing spaces in this item were not being ignored,
6967 causing some misleading effects.
6969 5. When deliver_drop_privilege was set, single queue runner processes started
6970 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6971 same command in the process it spins off) were not dropping privilege.
6973 6. When the daemon running as "exim" started a queue runner, it always
6974 re-executed Exim in the spun-off process. This is a waste of effort when
6975 deliver_drop_privilege is set. The new process now just calls the
6976 queue-runner function directly.
6982 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6985 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6986 ignored. Though the use of -oP was forcing the writing of a pid file, it
6987 was always written to the default place.
6989 3. If the message "no IP address found for host xxxx" is generated during
6990 incoming verification, it is now followed by identification of the incoming
6991 connection (so you can more easily find what provoked it).
6993 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6995 5. Added some features to "harden" Exim a bit more against certain attacks:
6997 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6998 be put in Local/Makefile. This is like the never_users runtime option,
6999 but it cannot be overridden. The default setting is "root".
7001 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7002 prefix string with which any file named in a -C command line option
7005 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7006 is retained for -C and -D only if the caller of Exim is root. Without
7007 it, the exim user may also use -C and -D and retain privilege.
7009 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7010 command line option is disabled.
7012 6. Macro names set by the -D option must start with an upper case letter, just
7013 like macro names defined in the configuration file.
7015 7. Added "dereference=" facility to LDAP.
7017 8. Two instances of the typo "uknown" in the source files are fixed.
7019 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7020 the Configure-Makefile script screwed up while processing it.
7022 10. Incorporated PCRE 4.4.
7024 11. The SMTP synchronization check was not operating right at the start of an
7025 SMTP session. For example, it could not catch a HELO sent before the client
7026 waited for the greeting. There is now a check for outstanding input at the
7027 point when the greeting is written. Because of the duplex, asynchronous
7028 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7029 way, but not yet received, when the check is performed.
7031 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7032 on TCP/IP sockets, because this apparently causes some broken clients to
7035 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7036 unchanged) from the Cygwin maintainer.
7038 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7039 was supported instead of testing for mbx. Effectively a typo.
7041 15. The spa authenticator server code was not checking that the input it
7042 received was valid base64.
7044 16. The debug output line for the "set" modifier in ACLs was not showing the
7045 name of the variable that was being set.
7047 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7049 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7050 lookup on its own. Something else was needed to trigger the lookup. For
7051 example, a match in host_lookup or the need for a host name in a host list.
7052 Now, if $sender_host_name is referenced and the host name has not yet been
7053 looked up, a lookup is performed. If the lookup fails, the variable remains
7054 empty, and $host_lookup_failed is set to "1".
7056 19. Added "eqi" as a case-independent comparison operator.
7058 20. The saslauthd authentication condition could segfault if neither service
7059 nor realm was specified.
7061 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7062 error message that was logged was misleading, and incoming SMTP
7063 connections were dropped. The message is now more accurate, and temporary
7064 errors are given to SMTP connections.
7066 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7067 (except RSET) with a 421 error, until QUIT is received. However, it was
7068 failing to send a response to QUIT.
7070 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7071 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7072 ACL is now run after the helo_try_verify_hosts code.
7074 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7075 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7076 case-independent, so other case variants are also recognized). Apparently
7077 some systems use these upper case variants.
7079 25. If more than two messages were waiting for the same host, and a transport
7080 filter was specified for the transport, Exim sent two messages over the
7081 same TCP/IP connection, and then failed with "socket operation on non-
7082 socket" when it tried to send the third.
7084 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7086 27. The extern definition of crypt16() in expand.c was not being excluded when
7087 the OS had its own crypt16() function.
7089 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7090 as a preferred synonym for return_size_limit, both as an option and as an
7093 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7095 30. Changed the default configuration ACL to relax the local part checking rule
7096 for addresses that are not in any local domains. For these addresses,
7097 slashes and pipe symbols are allowed within local parts, but the sequence
7098 /../ is explicitly forbidden.
7100 31. SPA server authentication was not clearing the challenge buffer before
7103 32. log_message in a "warn" ACL statement was writing to the reject log as
7104 well as to the main log, which contradicts the documentation and doesn't
7105 seem right (because no rejection is happening). So I have stopped it.
7107 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7108 However, I am unable to do any testing of this.
7110 34. Fixed an infelicity in the appendfile transport. When checking directories
7111 for a mailbox, to see if any needed to be created, it was accidentally
7112 using path names with one or more superfluous leading slashes; tracing
7113 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7115 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7116 contents are added to the log line that is written for every discarded
7117 recipient. (Previously a log_message setting was ignored.)
7119 36. The ${quote: operator now quotes the string if it is empty.
7121 37. The install script runs exim in order to find its version number. If for
7122 some reason other than non-existence or emptiness, which it checks, it
7123 could not run './exim', it was installing it with an empty version number,
7124 i.e. as "exim-". This error state is now caught, and the installation is
7127 38. An argument was missing from the function that creates an error message
7128 when Exim fails to connect to the socket for saslauthd authentication.
7129 This could cause Exim to crash, or give a corrupted message.
7131 39. Added isip, isip4, and isip6 to ${if conditions.
7133 40. The ACL variables $acl_xx are now saved with the message, and can be
7134 accessed later in routers, transports, and filters.
7136 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7137 strings in the file are not string-expanded.
7139 42. If a MAIL command specified a SIZE value that was too large to fit into an
7140 int variable, the check against message_size_limit failed. Such values are
7141 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7142 day this will have to be increased, but I don't think I want to be around
7143 when emails are that large.
7150 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7151 iconv() is not standard in FreeBSD.
7153 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7154 IPv6 enabled. The observed symptom was a segmentation fault on return from
7155 the function os_common_find_running_interfaces() in src/os.c.
7157 3. In the check_special_case() function in daemon.c I had used "errno" as an
7158 argument name, which causes warnings on some systems. This was basically a
7159 typo, since it was named "eno" in the comments!
7161 4. The code that waits for the clock to tick (at a resolution of some fraction
7162 of a second) so as to ensure message-id uniqueness was always waiting for
7163 at least one whole tick, when it could have waited for less. [This is
7164 almost certainly not relevant at current processor speeds, where it is
7165 unlikely to ever wait at all. But we try to future-proof.]
7167 5. The function that sleeps for a time interval that includes fractions of a
7168 second contained a race. It did not block SIGALRM between setting the
7169 timer, and suspending (a couple of lines later). If the interval was short
7170 and the sigsuspend() was delayed until after it had expired, the suspension
7171 never ended. On busy systems this could lead to processes getting stuck for
7174 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7175 process, before it forks any delivery processes. The open lookup caching
7176 mechanism meant that the open file or database connection was passed into
7177 the delivery process. The problem was that delivery processes always tidy
7178 up cached lookup data. This could cause a problem for the next delivery
7179 process started by the queue runner, because the external queue runner
7180 process does not know about the closure. So the next delivery process
7181 still has data in the lookup cache. In the case of a file lookup, there was
7182 no problem because closing a file descriptor in a subprocess doesn't affect
7183 the parent. However, if the lookup was caching a connection to a database,
7184 the connection was closed, and the second delivery process was likely to
7185 see errors such as "PGSQL: query failed: server closed the connection
7186 unexpectedly". The problem has been fixed by closing all cached lookups
7187 in a queue runner before running a delivery process.
7189 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7190 seem to have the "const" qualifier which it has on other OS. I've
7193 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7194 *of the same type* (client or server) with the same public name that an
7195 error should be diagnosed.
7197 9. When Exim looked up a host name for an IP address, but failed to find the
7198 original IP address when looking up the host name (a safety check), it
7199 output the message "<ip address> does not match any IP for NULL", which was
7200 confusing, to say the least. The bug was that the host name should have
7201 appeared instead of "NULL".
7203 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7204 user that is built into the binary, and the -C or -D options is used, root
7205 privilege is dropped before the configuration file is read. In addition,
7206 logging is switched to stderr instead of the normal log files. If the
7207 configuration then re-defines the Exim user, the unprivileged environment
7208 is probably not what is expected, so Exim logs a panic warning message (but
7211 However, if deliver_drop_privilege is set, the unprivileged state may well
7212 be exactly what is intended, so the warning has been cut out in that case,
7213 and Exim is allowed to try to write to its normal log files.
7219 1. smtp_return_error_details was not giving details for temporary sender
7220 or receiver verification errors.
7222 2. Diagnose a configuration error if two authenticators have the same public
7225 3. Exim used not to create the message log file for a message until the first
7226 delivery attempt. This could be confusing when incoming messages were held
7227 for policy or load reasons. The message log file is now created at the time
7228 the message is received, and an initial "Received" line is written to it.
7230 4. The automatically generated man page for command line options had a minor
7231 bug that caused no ill effects; however, a more serious problem was that
7232 the procedure for building the man page automatically didn't always
7233 operate. Consequently, release 4.20 contains an out-of-date version. This
7234 shouldn't happen again.
7236 5. When building Exim with embedded Perl support, the script that builds the
7237 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7238 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7240 6. The freeze_tell option was not being used for messages that were frozen on
7241 arrival, either by an ACL or by local_scan().
7243 7. Added the smtp_incomplete_transaction log selector.
7245 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7246 was accepting AUTH without a new EHLO.
7248 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7249 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7252 10. Logging of TCP/IP connections (when configured) now happens in the main
7253 daemon process instead of the child process, so that the TCP/IP connection
7254 count is more accurate (but it can never be perfect).
7256 11. The use of "drop" in a nested ACL was not being handled correctly in the
7257 outer ACL. Now, if condition failure induced by the nested "drop" causes
7258 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7259 or "require"), the connection is dropped.
7261 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7262 that yield "discard" can now be used with an "accept" or a "discard" verb,
7263 but an error is generated for any others (because I can't see a useful way
7264 to define what should happen).
7266 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7267 are now processed in the same way as lines in the Exim configuration file.
7268 In particular, continuation lines are supported.
7270 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7272 15. Added -ti meaning -t -i.
7274 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7275 domains, and warn by logging if others are found.
7277 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7278 returned from GIFCONF when Exim is trying to find the list of interfaces on
7279 a host. The code in os.c has been modified to copy each ifreq to an aligned
7280 structure in all cases.
7282 Also, in some cases, the returned ifreq's were being copied to a 'struct
7283 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7284 means the last couple of bytes of an IPv6 address could be chopped if the
7285 ifreq contained only a normal sockaddr (14 bytes storage).
7287 18. Named domain lists were not supported in the hosts_treat_as_local option.
7288 An entry such as +xxxx was not recognized, and was treated as a literal
7291 19. Ensure that header lines added by a DATA ACL are included in the reject log
7292 if the ACL subsequently rejects the message.
7294 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7295 MD5 (which is deprecated).
7297 21. When testing a filter file using -bf, Exim was writing a message when it
7298 took the sender from a "From " line in the message, but it was not doing so
7299 when it took $return_path from a Return-Path: header line. It now does.
7301 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7302 with a valid header line field name (a series of printing characters
7303 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7305 23. Changed "disc" in the source to "disk" to conform to the documentation and
7306 the book and for uniformity.
7308 24. Ignore Sendmail's -Ooption=value command line item.
7310 25. When execve() failed while trying to run a command in a pipe transport,
7311 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7312 could be confused with a return value of 69 from the command itself. This
7313 has been changed to 127, the value the shell returns if it is asked to run
7314 a non-existent command. The wording for the related log line suggests a
7315 non-existent command as the problem.
7317 26. If received_header_text expands to an empty string, do not add a Received:
7318 header line to the message. (Well, it adds a token one on the spool, but
7319 marks it "old" so that it doesn't get used or transmitted.)
7321 27. Installed eximstats 1.28 (addition of -nt option).
7323 28. There was no check for failure on the call to getsockname() in the daemon
7324 code. This can fail if there is a shortage of resources on the system, with
7325 ENOMEM, for example. A temporary error is now given on failure.
7327 29. Contrary to the C standard, it seems that in some environments, the
7328 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7329 program. Exim now does this explicitly; it affects the formatting of
7330 timestamps using strftime().
7332 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7333 complaints. I've now initialized all the variables, to avoid this.
7335 32. Header lines added by a system filter were not being "seen" during
7336 transport-time rewrites.
7338 33. The info_callback() function passed to OpenSSL is set up with type void
7339 (*)(SSL *, int, int), as described somewhere. However, when calling the
7340 function (actually a macro) that sets it up, the type void(*)() is
7341 expected. I've put in a cast to prevent warnings from picky compilers.
7343 34. If a DNS black list lookup found a CNAME record, but there were no A
7344 records associated with the domain it pointed at, Exim crashed.
7346 35. If a DNS black list lookup returned more than one A record, Exim ignored
7347 all but the first. It now scans all returned addresses if a particular IP
7348 value is being sought. In this situation, the contents of the
7349 $dnslist_value variable are a list of all the addresses, separated by a
7352 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7353 to accept a host name and all its aliases if the forward lookup for any of
7354 them yielded the IP address of the incoming connection. Now it accepts only
7355 those names whose forward lookup yields the correct IP address. Any other
7356 names are discarded. This closes a loophole whereby a rogue DNS
7357 administrator could create reverse DNS records to break through a
7358 wildcarded host restriction in an ACL.
7360 37. If a user filter or a system filter that ran in a subprocess used any of
7361 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7362 the wrong values were passed to the pipe command ($thisaddress had the
7363 value of $0, $0 had the value of $1, etc). This bug was introduced by
7364 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7366 38. Improved the line breaking for long SMTP error messages from ACLs.
7367 Previously, if there was no break point between 40 and 75 characters, Exim
7368 left the rest of the message alone. Two changes have been made: (a) I've
7369 reduced the minimum length to 35 characters; (b) if it can't find a break
7370 point between 35 and 75 characters, it looks ahead and uses the first one
7371 that it finds. This may give the occasional overlong line, but at least the
7372 remaining text gets split now.
7374 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7375 file descriptors might be low, and that setting 1000 would always raise it.
7376 It turns out that in some environments, the limit is already over 1000 and
7377 that lowering it causes trouble. So now Exim takes care not to decrease it.
7379 40. When delivering a message, the value of $return_path is set to $sender_
7380 address at the start of routing (routers may change the value). By an
7381 oversight, this default was not being set up when an address was tested by
7382 -bt or -bv, which affected the outcome if any router or filter referred to
7385 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7386 log only when "message" or "log_message" are set. However, if one of the
7387 conditions was an address verification, or a call to a nested ACL, the
7388 messages generated by the underlying test were being passed through. This
7389 no longer happens. The underlying message is available in $acl_verify_
7390 message for both "message" and "log_message" expansions, so it can be
7391 passed through if needed.
7393 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7394 new expansion $bh_ to give the encoded byte string without charset
7395 translation. Translation happens only if iconv() is available; HAVE_ICONV
7396 indicates this at build time. HEADERS_CHARSET gives the charset to
7397 translate to; headers_charset can change it in the configuration, and
7398 "headers charset" can change it in an individual filter file.
7400 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7401 that creates RFC 2047 encoded "words" labels them as that charset instead
7402 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7403 expansion operator; (ii) when Exim creates a From: line for a local
7404 message; (iii) when a header line is rewritten to include a "phrase" part.
7406 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7407 buggy, causing it to skip the first lines of messages whose message ID
7408 ended in 'D'. This would not have bitten before Exim release 4.14, because
7409 message IDs were unlikely to end in 'D' before then. The effect was to have
7410 incorrect size information for certain domains.
7412 45. #include "config.h" was missing at the start of the crypt16.c module. This
7413 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7416 46. If there was a timeout during a "random" callout check, Exim treated it as
7417 a failure of the random address, and carried on sending RSET and the real
7418 address. If the delay was just some slowness somewhere, the response to the
7419 original RCPT would be taken as a response to RSET and so on, causing
7420 mayhem of various kinds.
7422 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7423 when I implemented it. It didn't allow for the fact that some option values
7424 may legitimately be negative (e.g. size_addition), and it didn't even do
7425 the right test for positive values.
7427 48. Domain names in DNS records are case-independent. Exim always looks them up
7428 in lower case. Some resolvers return domain names in exactly the case they
7429 appear in the zone file, that is, they may contain uppercase letters. Not
7430 all resolvers do this - some return always lower case. Exim was treating a
7431 change of case by a resolver as a change of domain, similar to a widening
7432 of a domain abbreviation. This triggered its re-routing code and so it was
7433 trying to route what was effectively the same domain again. This normally
7434 caused routing to fail (because the router wouldn't handle the domain
7435 twice). Now Exim checks for this case specially, and just changes the
7436 casing of the domain that it ultimately uses when it transmits the message
7439 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7442 50. If a filter generated a file delivery with a non-absolute name (possible if
7443 no home directory exists for the router), the forbid_file option was not
7446 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7447 the existing equality matching.
7449 52. Exim was using ints instead of ino_t variables in some places where it was
7450 dealing with inode numbers.
7452 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7453 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7454 called TMPDIR, and if it finds it is different, it changes its value.
7456 54. The smtp_printf() function is now made available to local_scan() so
7457 additional output lines can be written before returning. There is also an
7458 smtp_fflush() function to enable the detection of a dropped connection.
7459 The variables smtp_input and smtp_batched_input are exported to
7462 55. Changed the default runtime configuration: the message "Unknown user"
7463 has been removed from the ACL, and instead placed on the localuser router,
7464 using the cannot_route_message feature. This means that any verification
7465 failures that generate their own messages won't get overridden. Similarly,
7466 the "Unrouteable address" message that was in the ACL for unverifiable
7467 relay addresses has also been removed.
7469 56. Added hosts_avoid_esmtp to the smtp transport.
7471 57. The exicyclog script was not checking for the esoteric option
7472 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7473 will work only if exicyclog is run under the appropriate euid.
7475 58. Following a discussion on the list, the rules by which Exim recognises line
7476 endings on incoming messages have been changed. The -dropcr and drop_cr
7477 options are now no-ops, retained only for backwards compatibility. The
7478 following line terminators are recognized: LF CRLF CR. However, special
7479 processing applies to CR:
7481 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7482 nor a local message in the state where . is a terminator.
7484 (ii) If a bare CR is encountered in a header line, an extra space is added
7485 after the line terminator so as not to end the header. The reasoning
7486 behind this is that bare CRs in header lines are most likely either
7487 to be mistakes, or people trying to play silly games.
7489 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7490 was being incorrectly given as 18 bytes larger than it should have been.
7491 This is a VOB (very old bug).
7493 60. This may never have affected anything current, but just in case it has:
7494 When the local host is found other than at the start of a list of hosts,
7495 the local host, those with the same MX, and any that follow, are discarded.
7496 When the list in question was part of a longer list of hosts, the following
7497 hosts (not currently being processed) were also being discarded. This no
7498 longer happens. I'm not sure if this situation could ever has previously
7501 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7504 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7505 header. This is something that is recommended in a new Internet Draft, and
7506 is something that is documented as being done by Sendmail. There are two
7507 possible values. For messages generated by the autoreply transport, Exim
7510 Auto-Submitted: auto-replied
7512 whereas for all other generated messages (e.g. bounces) it adds
7514 Auto-Submitted: auto-generated
7516 63. The "personal" condition in filters now includes a test for the
7517 Auto-Submitted: header. If it contains the string "auto-" the message it
7518 not considered personal.
7520 64. Added rcpt_include_affixes as a generic transport option.
7522 65. Added queue_only_override (default true).
7524 66. Added the syslog_duplication option.
7526 67. If what should have been the first header line of a message consisted of
7527 a space followed by a colon, Exim was mis-interpreting it as a header line.
7528 It isn't of course - it is syntactically invalid and should therefore be
7529 treated as the start of the message body. The misbehaviour could have
7530 caused a number of strange effects, including loss of data in subsequent
7531 header lines, and spool format errors.
7533 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7534 client host had authenticated. This control can now be exercised by an ACL
7535 for more flexibility.
7537 69. By default, callouts do not happen when testing with -bh. There is now a
7538 variant, -bhc, which does actually run the callout code, including
7539 consulting and updating the callout cache.
7541 70. Added support for saslauthd authentication, courtesy of Alexander
7544 71. If statvfs() failed on the spool or log directories while checking their
7545 size for availability, Exim confusingly gave the error "space shortage".
7546 Furthermore, in debugging mode it crashed with a floating point exception.
7547 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7548 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7549 serious problem, Exim now writes to the main and panic logs when this
7550 happens, with details of the failure. It then refuses to accept the
7551 incoming message, giving the message "spool directory problem" or "log
7552 directory problem" with a 421 code for SMTP messages.
7554 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7555 0, 1, and 2 exist, because some OS complain for execs without them (see
7556 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7557 descriptors. However, the code omitted to check that the open succeeded,
7558 causing mysterious errors if for some reason the permissions on /dev/null
7559 got screwed. Now Exim writes a message to the main and panic logs, and
7560 bombs out if it can't open /dev/null.
7562 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7563 interact so that it is all more flexible. It is supposed to remain
7564 backwards compatible. Also added extra_local_interfaces.
7566 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7567 to bomb out with an assertion failure - to the client this appears as a
7568 connection drop. This problem occurs in the part of the code that was taken
7569 from the Samba project. Fortunately, the assertion is in a very simple
7570 function, so I have fixed this by reproducing the function inline in the
7571 one place where it is called, and arranging for authentication to fail
7572 instead of killing the process with assert().
7574 75. The SPA client code was not working when the server requested OEM rather
7575 than Unicode encoding.
7577 76. Added code to make require_files with a specific uid setting more usable in
7578 the case where statting the file as root fails - usually a non-root-mounted
7579 NFS file system. When this happens and the failure is EACCES, Exim now
7580 forks a subprocess and does the per-uid checking as the relevant uid.
7582 77. Added process_log_path.
7584 78. If log_file_path was not explicitly set, a setting of check_log_space or
7585 check_log_inodes was ignored.
7587 79. If a space check for the spool or log partitions fails, the incident is now
7588 logged. Of course, in the latter case the data may get lost...
7590 80. Added the %p formatting code to string_format() so that it can be used to
7591 print addresses in debug_print(). Adjusted all the address printing in the
7592 debugging in store.c to use %p rather than %d.
7594 81. There was a concern that a line of code in smtp_in.c could overflow a
7595 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7596 initially expressed, the concern was not well-founded, because trailing
7597 spaces are removed early. However, if the trailing spaces were followed by
7598 a NULL, they did not get removed, so the overflow was possible. Two fixes
7601 (a) I re-wrote the offending code in a cleaner fashion.
7602 (b) If an incoming SMTP command contains a NULL character, it is rejected
7605 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7606 runs initgroups(), so that if the Exim user is in any additional groups,
7607 they will be used during message reception.
7613 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob