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.
35 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
36 the ordering of its ARC headers. This caused a crash.
38 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
39 a new record was being constructed with information from the peer, a trap
42 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
43 installation would get error messages from DMARC verify, when it hit the
44 nonexistent file indicated by the default. Distros wanting DMARC enabled
45 should both provide the file and set the option.
46 Also enforce no DMARC verification for command-line sourced messages.
48 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
49 could, depending on the platform, hang at the STARTTLS response.
55 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
56 side, to decode a TLS 1.3 packet capture.
58 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
59 Previously the default library behaviour applied, sending two, each in
62 JH/03 Debug output for ACL now gives the config file name and line number for
65 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
67 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
69 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
70 buffer overrun for (non-chunking) other transports.
72 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
73 TLS1.3, means that a server rejecting a client certificate is not visible
74 to the client until the first read of encrypted data (typically the
75 response to EHLO). Add detection for that case and treat it as a failed
76 TLS connection attempt, so that the normal retry-in-clear can work (if
79 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
80 and/or domain. Found and fixed by Jason Betts.
82 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
83 configuration). If a CNAME target was not a wellformed name pattern, a
86 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
87 the OS reports them interleaved with other addresses.
89 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
90 used both for input and for a verify callout, both encrypted, SMTP
91 responses being sent by the server could be lost. This resulted in
92 dropped connections and sometimes bounces generated by a peer sending
95 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
96 string. Previously it was possible to cause undefined behaviour in a
97 library routine (usually a crash). Found by "zerons".
99 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
102 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
103 API was removed, so update to use the newer ones.
105 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
106 any timeout set, is taking a long time. Previously we would hang on to a
107 rotated logfile "forever" if the input was arriving with long gaps
108 (a previous attempt to fix addressed lack, for a long time, of initial
111 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
112 shared (NFS) environment. The length of the tempfile name is now
113 4 + 16 ("hdr.$message_exim_id") which might break on file
114 systems which restrict the file name length to lower values.
117 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
118 shared (NFS) environment.
120 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
121 did for all versions <4.90). Notably -M, -m, --invert, -I may be
124 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
125 on some platforms for bit 31.
127 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
128 to changes apparently associated with TLS1.3 handling some of the APIs
129 previously used were either nonfunctional or inappropriate. Strings
130 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
131 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
132 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
133 This affects log line X= elements, the $tls_{in,out}_cipher variables,
134 and the use of specific cipher names in the encrypted= ACL condition.
136 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
138 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
139 verification result was not updated unless hosts_require_ocsp applied.
141 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
142 queue_list_requires_admin set to false, non-admin users were denied the
145 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
146 directory-of-certs mode. Previously they were advertised despite the
149 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
150 A single TCP connection by a client will now hold a TLS connection open
151 for multiple message deliveries, by default. Previoud the default was to
154 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
155 default. If built with the facility, DANE will be used. The facility
156 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
158 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
159 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
160 must be defined and you must still, unless you define DISABLE_TLS, manage
161 the the include-dir and library-file requirements that go with that
162 choice. Non-TLS builds are still supported.
164 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
167 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
168 default. If the platform supports and has the facility enabled, it will
169 be requested on all coneections.
171 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
172 controlled by the build-time option SUPPORT_PIPE_CONNECT.
174 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
176 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
177 success-DSN messages. Previously the From: header was always the default
178 one for these; the option was ignored.
180 JH/28 Fix the timeout on smtp response to apply to the whole response.
181 Previously it was reset for every read, so a teergrubing peer sending
182 single bytes within the time limit could extend the connection for a
183 long time. Credit to Qualsys Security Advisory Team for the discovery.
185 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
186 delivery address, which leaked information of the results of local
187 forwarding. Change to the original envelope recipient address, per
190 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
191 requested. Previously not bounce was generated and a log entry of
192 error ignored was made.
194 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
196 JH/32 Introduce a general tainting mechanism for values read from the input
197 channel, and values derived from them. Refuse to expand any tainted
198 values, to catch one form of exploit.
200 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
201 was unused and the unexpanded text used for the test. Found and
202 fixed by Ruben Jenster.
204 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
205 an attempt to use a TLS library read routine dereffed a nul pointer,
208 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
209 them in our smtp response.
211 JH/36 Have the general router option retry_use_local_part default to true when
212 any of the restrictive preconditions are set (to anything). Previously it
213 was only for check_local user. The change removes one item of manual
214 configuration which is required for proper retries when a remote router
215 handles a subset of addresses for a domain.
217 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
218 link count into consideration.
220 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
221 caused the extension of big_buffer, the following lines were ignored.
223 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
224 accordance with RFC 2308. Previously there was no expiry, so a longlived
225 receive process (eg. due to ACL delays) versus a short SOA value could
228 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
230 JH/39 Promote DMARC support to mainline.
232 JH/40 Bug 2452: Add a References: header to DSNs.
234 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
235 parameters. The relevant library call is documented as "Deprecated: This
236 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
237 3.6.0, DH parameters are negotiated following RFC7919."
239 HS/06 Change the default of dnssec_request_domains to "*"
241 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
242 carried on and emitted a BDAT command, even when PIPELINING was not
245 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
246 buffer was used for the filename, resulting in a trap when tainted
247 arguments (eg. $domain) were used.
249 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
250 recommended to avoid a possible server-load attack. The feature can be
251 re-enabled via the openssl_options main cofiguration option.
253 JH/45 local_scan API: documented the current smtp_printf() call. This changed
254 for version 4.90 - adding a "more data" boolean to the arguments.
255 Bumped the ABI version number also, this having been missed previously;
256 release versions 4.90 to 4.92.3 inclusive were effectively broken in
257 respect of usage of smtp_printf() by either local_scan code or libraries
258 accessed via the ${dlfunc } expansion item. Both will need coding
259 adjustment for any calls to smtp_printf() to match the new function
260 signature; a FALSE value for the new argument is always safe.
262 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
263 the file-offset (which the Linux syscall does, and exim expects); this
264 resulted in an indefinite loop.
266 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
267 to do ARC verification. The Authentication-Results: header line added
268 by the configuration then had no ARC item.
274 JH/01 Remove code calling the customisable local_scan function, unless a new
275 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
277 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
278 non-signal-safe functions being used.
280 JH/03 Bug 2269: When presented with a received message having a stupidly large
281 number of DKIM-Signature headers, disable DKIM verification to avoid
282 a resource-consumption attack. The limit is set at twenty.
284 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
285 report of oldest_pass in ${authres } in consequence, and separate out
286 some descriptions of reasons for verification fail.
288 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
289 files in the spool were present and unlocked. A queue-runner could spot
290 them, resulting in a duplicate delivery. Fix that by doing the unlock
291 after the unlink. Investigation by Tim Stewart. Take the opportunity to
292 add more error-checking on spoolfile handling while that code is being
295 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
296 No known attacks, no CVE, this is defensive hardening.
298 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
299 a queue-runner could start a delivery while other operations were ongoing.
300 Cutthrough delivery was a common victim, resulting in duplicate delivery.
301 Found and investigated by Tim Stewart. Fix by using the open message data
302 file handle rather than opening another, and not locally closing it (which
303 releases a lock) for that case, while creating the temporary .eml format
304 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
306 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
307 $sender_verify_failure/$recipient_verify_failure to "random".
309 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
312 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
313 Previously this would segfault.
315 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
318 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
319 like zero, since the resolver should be doing this for us, But we need one
320 as a CNAME but no MX presence gets the CNAME returned; we need to check
321 that doesn't point to an MX to declare it "no MX returned" rather than
322 "error, loop". A new main option is added so the older capability of
323 following some limited number of chain links is maintained.
325 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
327 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
328 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
329 now-deprecated earlier definitions used only specified the range up to TLS
330 1.2 (in the older-version library docs).
332 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
334 JH/15 Rework TLS client-side context management. Stop using a global, and
335 explicitly pass a context around. This enables future use of TLS for
336 connections to service-daemons (eg. malware scanning) while a client smtp
337 connection is using TLS; with cutthrough connections this is quite likely.
339 JH/16 Fix ARC verification to do AS checks in reverse order.
341 JH/17 Support a "tls" option on the ${readsocket } expansion item.
343 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
344 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
345 Previously the "utf8" would be re-prepended for every additional message.
347 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
348 Previously thery were accepted, resulting in issues when attempting to
349 forward messages to a non-supporting MTA.
351 PP/02 Let -n work with printing macros too, not just options.
353 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
354 one parent address was copied, and bogus data was used at delivery-logging
355 time. Either a crash (after delivery) or bogus log data could result.
356 Discovery and analysis by Tim Stewart.
358 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
359 Previously if the string ended mid-character, we did not insert the
360 promised '?' replacement.
362 PP/04 Documentation: current string operators work on bytes, not codepoints.
364 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
365 should pack well giving a smaller memory footprint so better caching and
366 therefore performance. Group the declarations where this can't be done so
367 that the byte-sized flag variables are not interspersed among pointer
368 variables, giving a better chance of good packing by the compiler.
370 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
371 non-null, to avoid issues with sites running BATV. Previously reports were
372 sent with an empty envelope sender so looked like bounces.
374 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
375 The ignore_error flag wasn't being returned from the filter subprocess so
376 was not set for later routers. Investigation and fix by Matthias Kurz.
378 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
379 and a msg:complete for the whole, when a message is manually removed using
380 -Mrm. Developement by Matthias Kurz, hacked on by JH.
382 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
383 a "Gnu special" function, asprintf() in the DB utility binary builds; I
384 hope that is portable enough.
386 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
387 requiring a known-CA anchor certificate; make it now rely entirely on the
388 TLSA as an anchor. Checking the name on the leaf cert against the name
389 on the A-record for the host is still done for TA (but not for EE mode).
391 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
392 included in delivery lines for non-proxied connections, when compiled with
393 SUPPORT_SOCKS and running with proxy logging enabled.
395 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
396 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
397 move the existing event to fire before the normal logging of message
398 failure so that custom logging is bracketed by normal logging.
400 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
401 msg:fail:internal event. Developement by Matthias Kurz.
403 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
404 far too small for todays use of crypto signatures stored there. Go all
405 the way to the max DNS message size of 64kB, even though this might be
406 overmuch for IOT constrained device use.
408 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
409 copy a string over itself. The library routine is documented as not
410 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
412 JH/32 For main options check_spool_space and check_inode_space, where the
413 platform supports 64b integers, support more than the previous 2^31 kB
414 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
415 the previous G, M, k.
417 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
418 $authenticated_fail_id variable on authentication failure. Previously
421 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
422 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
423 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
424 GNUTLS_SEC_PARAM_MEDIUM.
426 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
427 side. Previously we would continue as if no SNI had been received.
429 JH/36 Harden the handling of string-lists. When a list consisted of a sole
430 "<" character, which should be a list-separator specification, we walked
431 off past the nul-terimation.
433 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
434 causes) even when the retry time is not yet met. Previously they were
435 not, meaning that when (say) an account was over-quota and temp-rejecting,
436 and multiple senders' messages were queued, only one sender would get
437 notified on each configured delay_warning cycle.
439 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
441 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
442 cipher-suites, an error can be left on the stack even for a succeeding
443 accept; this results in impossible error messages when a later operation
446 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
447 return error codes indicating retry. Under TLS1.3 this becomes required.
449 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
450 it only wrote the new authenticators, resulting in a lack of tracking of
451 peer changes of ESMTP extensions until the next cache flush.
453 JH/41 Fix the loop reading a message header line to check for integer overflow,
454 and more-often against header_maxsize. Previously a crafted message could
455 induce a crash of the recive process; now the message is cleanly rejected.
457 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
458 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
464 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
465 When redis_servers is set to a list of > 1 element, and the Redis servers
466 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
467 case of MOVED into a DEFER case instead, thus moving the query onto the
468 next server in the list. For a cluster of N elements, all N servers must
469 be defined in redis_servers.
471 GF/02 Catch and remove uninitialized value warning in exiqsumm
472 Check for existence of @ARGV before looking at $ARGV[0]
474 JH/01 Replace the store_release() internal interface with store_newblock(),
475 which internalises the check required to safely use the old one, plus
476 the allocate and data copy operations duplicated in both (!) of the
477 extant use locations.
479 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
480 modifier. This matches the restriction on the commandline.
482 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
483 Previously only the last row was returned.
485 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
486 we assumed that tags in the header were well-formed, and parsed the
487 element content after inspecting only the first char of the tag.
488 Assumptions at that stage could crash the receive process on malformed
491 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
492 While running the DKIM ACL we operate on the Permanent memory pool so that
493 variables created with "set" persist to the DATA ACL. Also (at any time)
494 DNS lookups that fail create cache records using the Permanent pool. But
495 expansions release any allocations made on the current pool - so a dnsdb
496 lookup expansion done in the DKIM ACL releases the memory used for the
497 DNS negative-cache, and bad things result. Solution is to switch to the
498 Main pool for expansions.
499 While we're in that code, add checks on the DNS cache during store_reset,
500 active in the testsuite.
501 Problem spotted, and debugging aided, by Wolfgang Breyha.
503 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
504 When none of the hosts presented to a transport match an already-open
505 connection, close it and proceed with the list. Previously we would
506 queue the message. Spotted by Lena with Yahoo, probably involving
509 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
510 Previously a spurious "250 OK id=" response was appended to the proper
513 JH/08 The "support for" informational output now, which built with Content
514 Scanning support, has a line for the malware scanner interfaces compiled
515 in. Interface can be individually included or not at build time.
517 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
518 by the template makefile "src/EDITME". The "STREAM" support for an older
519 ClamAV interface method is removed.
521 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
522 rows affected is given instead).
524 JH/11 The runtime Berkeley DB library version is now additionally output by
525 "exim -d -bV". Previously only the compile-time version was shown.
527 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
528 SMTP connection. Previously, when one had more receipients than the
529 first, an abortive onward connection was made. Move to full support for
530 multiple onward connections in sequence, handling cutthrough connection
531 for all multi-message initiating connections.
533 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
534 routers. Previously, a multi-recipient message would fail to match the
535 onward-connection opened for the first recipient, and cause its closure.
537 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
538 a timeout on read on a GnuTLS initiating connection, resulting in the
539 initiating connection being dropped. This mattered most when the callout
540 was marked defer_ok. Fix to keep the two timeout-detection methods
543 JH/15 Relax results from ACL control request to enable cutthrough, in
544 unsupported situations, from error to silently (except under debug)
545 ignoring. This covers use with PRDR, frozen messages, queue-only and
548 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
550 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
551 metadata, resulting in a crash in free().
553 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
554 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
555 Broken also in d185889f4, with init system revamp.
557 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
558 Previously we abruptly closed the connection after reading a malware-
559 found indication; now we go on to read the "scan ok" response line,
562 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
563 ACL. Previously, a crash would result.
565 JH/19 Speed up macro lookups during configuration file read, by skipping non-
566 macro text after a replacement (previously it was only once per line) and
567 by skipping builtin macros when searching for an uppercase lead character.
569 JH/20 DANE support moved from Experimental to mainline. The Makefile control
570 for the build is renamed.
572 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
573 was allocated for every new TLS startup, meaning one per message. Fix
574 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
576 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
577 reported the original. Fix to report (as far as possible) the ACL
578 result replacing the original.
580 JH/23 Fix memory leak during multi-message connections using STARTTLS under
581 OpenSSL. Certificate information is loaded for every new TLS startup,
582 and the resources needed to be freed.
584 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
586 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
589 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
590 DATA response info to the (existing) per-recipient response info for
591 the "C=" log element. It can have useful tracking info from the
592 destination system. Patch from Simon Arlott.
594 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
595 length value. Previously this would segfault.
597 HS/02 Support Avast multiline protoocol, this allows passing flags to
598 newer versions of the scanner.
600 JH/28 Ensure that variables possibly set during message acceptance are marked
601 dead before release of memory in the daemon loop. This stops complaints
602 about them when the debug_store option is enabled. Discovered specifically
603 for sender_rate_period, but applies to a whole set of variables.
604 Do the same for the queue-runner and queue-list loops, for variables set
605 from spool message files. Do the same for the SMTP per-message loop, for
606 certain variables indirectly set in ACL operations.
608 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
609 as a multi-recipient message from a mailinglist manager). The coding had
610 an arbitrary cutoff number of characters while checking for more input;
611 enforced by writing a NUL into the buffer. This corrupted long / fast
612 input. The problem was exposed more widely when more pipelineing of SMTP
613 responses was introduced, and one Exim system was feeding another.
614 The symptom is log complaints of SMTP syntax error (NUL chars) on the
615 receiving system, and refused recipients seen by the sending system
616 (propating to people being dropped from mailing lists).
617 Discovered and pinpointed by David Carter.
619 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
620 replaced by the ${authresults } expansion.
622 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
624 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
625 allows proper process termination in container environments.
627 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
628 Previously the "final dot" had a newline after it; ensure it is CR,LF.
630 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
631 and "err_perm", deprecated since 4.83 when the RFC-defined words
632 "temperror" and "permerror" were introduced.
634 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
635 transport-filters or DKIM-signing. The restriction was lost in the
636 consolidation of verify-callout and delivery SMTP handling.
637 Extend the restriction to also cover ARC-signing.
639 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
640 in defer=pass mode supply a 450 to the initiator. Previously the message
643 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
644 tls_require_ciphers is used as before.
646 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
647 "pass_unscanned". Only tmpfails from the scanner are written to
648 the paniclog, as they may require admin intervention (permission
649 denied, license issues). Other scanner errors (like decompression
650 bombs) do not cause a paniclog entry.
652 JH/36 Fix reinitialisation of DKIM logging variable between messages.
653 Previously it was possible to log spurious information in receive log
656 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
657 triggered odd behaviour from Outlook Express clients.
659 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
662 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
663 since the IETF WG has not yet settled on that versus the original
664 "bare" representation.
666 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
667 Previously the millisecond value corrupted the output.
668 Fix also for syslog_pid=no and log_selector +pid, for which the pid
669 corrupted the output.
675 JH/01 Rework error string handling in TLS interface so that the caller in
676 more cases is responsible for logging. This permits library-sourced
677 string to be attached to addresses during delivery, and collapses
678 pairs of long lines into single ones.
680 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
681 during configuration. Wildcards are allowed and expanded.
683 JH/02 Rework error string handling in DKIM to pass more info back to callers.
684 This permits better logging.
686 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
687 do not close it down and have the child transport start it up again on
688 the passed-on TCP connection. Instead, proxy the child (and any
689 subsequent ones) for TLS via a unix-domain socket channel. Logging is
690 affected: the continued delivery log lines do not have any DNSSEC, TLS
691 Certificate or OCSP information. TLS cipher information is still logged.
693 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
694 identical IP addresses on different listening ports. Will also affect
697 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
698 add noisy ifdef guards to special-case this sillyness.
699 Patch from Bernd Kuhls.
701 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
702 than 255 are no longer allowed.
704 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
705 Disable the session-cache too, which might reduce our load. Since we
706 currrectly use a new context for every connection, both as server and
707 client, there is no benefit for these.
708 GnuTLS appears to not support tickets server-side by default (we don't
709 call gnutls_session_ticket_enable_server()) but client side is enabled
710 by default on recent versions (3.1.3 +) unless the PFS priority string
713 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
714 <https://reproducible-builds.org/specs/source-date-epoch/>.
716 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
717 the check for any unsuccessful recipients did not notice the limit, and
718 erroneously found still-pending ones.
720 JH/08 Pipeline CHUNKING command and data together, on kernels that support
721 MSG_MORE. Only in-clear (not on TLS connections).
723 JH/09 Avoid using a temporary file during transport using dkim. Unless a
724 transport-filter is involved we can buffer the headers in memory for
725 creating the signature, and read the spool data file once for the
726 signature and again for transmission.
728 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
729 4.77 as the kernel support then wasn't solid, having issues in 64bit
730 mode. Now, it's been long enough. Add support for FreeBSD also.
732 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
733 case where the routing stage had gathered several addresses to send to
734 a host before calling the transport for the first, we previously failed
735 to close down TLS in the old transport process before passing the TCP
736 connection to the new process. The new one sent a STARTTLS command
737 which naturally failed, giving a failed delivery and bloating the retry
738 database. Investigation and fix prototype from Wolfgang Breyha.
740 JH/12 Fix check on SMTP command input synchronisation. Previously there were
741 false-negatives in the check that the sender had not preempted a response
742 or prompt from Exim (running as a server), due to that code's lack of
743 awareness of the SMTP input buffering.
745 PP/04 Add commandline_checks_require_admin option.
746 Exim drops privileges sanely, various checks such as -be aren't a
747 security problem, as long as you trust local users with access to their
748 own account. When invoked by services which pass untrusted data to
749 Exim, this might be an issue. Set this option in main configuration
750 AND make fixes to the calling application, such as using `--` to stop
753 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
754 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
755 responses to those, into a single TLS record each way (this usually means
756 a single packet). As a side issue, smtp_enforce_sync now works on TLS
759 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
760 affects you only if you're dancing at the edge of the param size limits.
761 If you are, and this message makes sense to you, then: raise the
762 configured limit or use OpenSSL 1.1. Nothing we can do for older
765 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
766 cmdline element to get the documented default one. Previously it was
769 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
770 are unsuable for non-message-specific reasons - eg. connection timeout,
771 banner-time rejection.
773 JH/16 Fix logging of delivery remote port, when specified by router, under
776 PP/06 Repair manualroute's ability to take options in any order, even if one
777 is the name of a transport.
780 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
782 JH/17 Change the list-building routines interface to use the expanding-string
783 triplet model, for better allocation and copying behaviour.
785 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
786 Previously it was constructed the first time a possibly-matching string
787 was met in the configuration file input during startup; now it is done
790 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
791 compatible one, to avoid the (poorly documented) possibility of a config
792 file in the working directory redirecting the DB files, possibly correpting
793 some existing file. CVE-2017-10140 assigned for BDB.
795 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
796 cache-hot. Previously, although the result was properly cached, the
797 initial verify call returned a defer.
799 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
800 the main verify for receipient in uncached-mode.
802 JH/22 Retire historical build files to an "unsupported" subdir. These are
803 defined as "ones for which we have no current evidence of testing".
805 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
806 if present. Previously it was ignored.
808 JH/24 Start using specified-initialisers in C structure init coding. This is
809 a C99 feature (it's 2017, so now considered safe).
811 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
812 if was a fixed-sized field and bitmask ops via macros; it is now more
815 PP/07 GitHub PR 56: Apply MariaDB build fix.
816 Patch provided by Jaroslav Škarvada.
818 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
819 during Coverity cleanups [4.87 JH/47]
820 Diagnosis and fix provided by Michael Fischer v. Mollard.
822 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
823 the right size to place the terminating semicolon on its own folded
824 line, the header hash was calculated to an incorrect value thanks to
825 the (relaxed) space the fold became.
827 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
828 and confused the parent.
830 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
831 which could crash as a result. This could lead to undeliverable messages.
833 JH/28 Logging: "next input sent too soon" now shows where input was truncated
836 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
837 matters on fast-turnover and PID-randomising systems, which were getting
838 out-of-order delivery.
840 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
841 a possibly-overlapping copy. The symptom was that "Remote host closed
842 connection in response to HELO" was logged instead of the actual 4xx
845 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
846 Previously only that bufferd was discarded, resulting in SYMTP command
849 JH/32 DKIM: when a message has multiple signatures matching an identity given
850 in dkim_verify_signers, run the dkim acl once for each. Previously only
851 one run was done. Bug 2189.
853 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
854 "panic the current process" to "deliberately defer". The panic log is
855 still written with the problem list name; the mail and reject logs now
856 get a temp-reject line for the message that was being handled, saying
857 something like "domains check lookup or other defer". The SMTP 451
858 message is still "Temporary local problem".
860 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
861 A crafted sequence of BDAT commands could result in in-use memory beeing
862 freed. CVE-2017-16943.
864 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
865 from SMTP input. Previously it was always done; now only done for DATA
866 and not BDAT commands. CVE-2017-16944.
868 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
869 to the message (such as an overlong header line). Previously this was
870 not done and we did not exit BDAT mode. Followon from the previous item
871 though a different problem.
877 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
878 than -2003 did; needs libidn2 in addition to libidn.
880 JH/02 The path option on a pipe transport is now expanded before use.
882 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
883 Patch provided by "Björn", documentation fix added too.
885 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
886 missing a wire-to-host endian conversion.
888 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
889 close after a BDAT command line could be taken as a following command,
890 giving a synch failure. Fix by only checking for synch immediately
891 before acknowledging the chunk.
893 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
894 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
895 macro. Patches provided by Josh Soref.
897 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
898 Previously we did not; the RFC seems ambiguous and VRFY is not listed
899 by IANA as a service extension. However, John Klensin suggests that we
902 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
903 the dkim code may be unix-mode line endings rather than smtp wire-format
904 CRLF, so prepend a CR to any bare LF.
906 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
907 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
909 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
910 the first were themselves being wrongly included in the feed into dkim
911 processing; with most chunk sizes in use this resulted in an incorrect
912 body hash calculated value.
914 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
915 DKIM signature block, for verification. Although advised against by
916 standards it is specifically not ruled illegal.
918 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
920 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
921 missing a body hash (the bh= tag).
923 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
924 It seems that HAProxy sends the Proxy Protocol information in clear and
925 only then does a TLS startup, so do the same.
927 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
928 TCP connections (such as for Spamd) unless the daemon successfully set
929 Fast Open mode on its listening sockets. This fixes breakage seen on
930 too-old kernels or those not configured for Fast Open, at the cost of
931 requiring both directions being enabled for TFO, and TFO never being used
932 by non-daemon-related Exim processes.
934 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
935 endings, at least on the first header line. Try to canonify any that get
936 past that check, despite the cost.
938 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
939 now limited to an arbitrary five deep, while parsing addresses with the
940 strip_excess_angle_brackets option enabled.
942 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
943 instead leave the unprompted TLS handshake in socket buffer for the
944 TLS library to consume.
946 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
948 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
950 JH/16 Drop variables when they go out of scope. Memory management drops a whole
951 region in one operation, for speed, and this leaves assigned pointers
952 dangling. Add checks run only under the testsuite which checks all
953 variables at a store-reset and panics on a dangling pointer; add code
954 explicitly nulling out all the variables discovered. Fixes one known
955 bug: a transport crash, where a dangling pointer for $sending_ip_address
956 originally assigned in a verify callout, is re-used.
958 PP/06 Drop '.' from @INC in various Perl scripts.
960 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
962 PP/08 Reduce a number of compilation warnings under clang; building with
963 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
964 should be warning-free.
966 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
968 HS/01 Fix portability problems introduced by PP/08 for platforms where
969 realloc(NULL) is not equivalent to malloc() [SunOS et al].
971 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
972 chunk. This allows us to accept broken chunked messages. We need a more
973 general solution here.
975 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
976 already-broken messages in the queue.
978 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
980 JH/19 Fix reference counting bug in routing-generated-address tracking.
986 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
987 supports it and a size is available (ie. the sending peer gave us one).
989 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
990 years of being deprecated). The replacements are the ACLs
991 acl_smtp_mime and acl_not_smtp_mime.
993 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
994 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
995 or even an in-clear connection were permitted. Now, if the host lookup
996 was dnssec and dane was requested then the host is only used if the
997 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
998 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
999 if one fails this test.
1000 This means that a poorly-configured remote DNS will make it incommunicado;
1001 but it protects against a DNS-interception attack on it.
1003 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1004 non-noisy when a race steals the message being considered.
1006 JH/05 If main configuration option tls_certificate is unset, generate a
1007 self-signed certificate for inbound TLS connections.
1009 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1010 in rewrites and routers.
1012 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1013 and logged a warning sing 4.83; now they are a configuration file error.
1015 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1016 (lacking @domain). Apply the same qualification processing as RCPT.
1018 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1020 JH/10 Support ${sha256:} applied to a string (as well as the previous
1023 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1024 a cutthrough deliver is pending, as we always want to make a connection.
1025 This also avoids re-routing the message when later placing the cutthrough
1026 connection after a verify cache hit.
1027 Do not update it with the verify result either.
1029 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1030 when routing results in more than one destination address.
1032 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1033 signing (which inhibits the cutthrough capability). Previously only
1034 the presence of an option was tested; now an expansion evaluating as
1035 empty is permissible (obviously it should depend only on data available
1036 when the cutthrough connection is made).
1038 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1039 the relevant preceding SMTP command did not note the pipelining mode.
1041 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1042 Previously they were not counted.
1044 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1045 as one having no matching records. Previously we deferred the message
1046 that needed the lookup.
1048 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1049 distinguished as "(=".
1051 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1052 for missing MX records. Previously it only worked for missing A records.
1054 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1056 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1057 after the data-go-ahead and data-ack. Patch from Jason Betts.
1059 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1060 even for a "none" policy. Patch from Tony Meyer.
1062 JH/22 Fix continued use of a connection for further deliveries. If a port was
1063 specified by a router, it must also match for the delivery to be
1066 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1067 When one of the recipients of a message was unsuitable for the connection
1068 (has no matching addresses), we lost track of needing to mark it
1069 deferred. As a result mail would be lost.
1071 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1073 JH/25 Decoding ACL controls is now done using a binary search; the source code
1074 takes up less space and should be simpler to maintain. Merge the ACL
1075 condition decode tables also, with similar effect.
1077 JH/26 Fix problem with one_time used on a redirect router which returned the
1078 parent address unchanged. A retry would see the parent address marked as
1079 delivered, so not attempt the (identical) child. As a result mail would
1082 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1083 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1084 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1087 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1088 Main config options check_{log,spool}_{inodes,space} are now
1089 100 inodes, 10MB unless set otherwise in the configuration.
1091 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1092 Previously it only applied to the main-section connection policy
1095 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1097 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1098 by me. Added RFC7919 DH primes as an alternative.
1100 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1101 are not in the system include path.
1103 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1104 GnuTLS, when a session startup failed (eg because the client disconnected)
1105 Exim did stdio operations after fclose. This was exposed by a recent
1106 change which nulled out the file handle after the fclose.
1108 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1109 signed directly by the cert-signing cert, rather than an intermediate
1110 OCSP-signing cert. This is the model used by LetsEncrypt.
1112 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1114 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1115 an incoming connection.
1117 HS/02 Bug 1802: Do not half-close the connection after sending a request
1120 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1121 fallback to "prime256v1".
1123 JH/34 SECURITY: Use proper copy of DATA command in error message.
1124 Could leak key material. Remotely exploitable. CVE-2016-9963.
1130 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1131 and 3.4.4 - once the server is enabled to respond to an OCSP request
1132 it does even when not requested, resulting in a stapling non-aware
1133 client dropping the TLS connection.
1135 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1136 support variable-length bit vectors. No functional change.
1138 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1139 The I= interface field on outgoing lines is now after the H= remote
1140 host field, same as incoming lines. There is a separate
1141 outgoing_interface log selector which allows you to disable the
1144 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1145 If not running log_selector +smtp_connection the mainlog would be held
1146 open indefinitely after a "too many connections" event, including to a
1147 deleted file after a log rotate. Leave the per net connection logging
1148 leaving it open for efficiency as that will be quickly detected by the
1149 check on the next write.
1151 HS/01 Bug 1671: Fix post transport crash.
1152 Processing the wait-<transport> messages could crash the delivery
1153 process if the message IDs didn't exist for some reason. When
1154 using 'split_spool_directory=yes' the construction of the spool
1155 file name failed already, exposing the same netto behaviour.
1157 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1158 mime_regex ACL conditions.
1160 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1161 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1162 to HELO, local diagnostic string.
1164 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1165 log line to debug. Even when configured with a tls authenticator many
1166 client connections are expected to not authenticate in this way, so
1167 an authenticate fail is not an error.
1169 HS/02 Add the Exim version string to the process info. This way exiwhat
1170 gives some more detail about the running daemon.
1172 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1173 matter for fast-change records such as DNSBLs.
1175 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1176 retry record, even if constant. There may be multiple transports with
1177 different interface settings and the retry behaviour needs to be kept
1180 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1182 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1184 JH/10 Bug 840: fix log_defer_output option of pipe transport
1186 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1187 hosts_randomize. This matters a lot when combined with mua_wrapper.
1189 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1190 ${quote_pgsql:<string>} operator.
1192 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1194 JH/14 Change header file name for freeradius-client. Relevant if compiling
1195 with Radius support; from the Gentoo tree and checked under Fedora.
1197 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1199 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1200 option transport_filter, meaning no filtering.
1202 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1204 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1205 defaults to "*" (all hosts). The variable is now available when not built
1206 with TLS, default unset, mainly to enable keeping the testsuite sane.
1207 If a server certificate is not supplied (via tls_certificate) an error is
1208 logged, and clients will find TLS connections fail on startup. Presumably
1209 they will retry in-clear.
1210 Packagers of Exim are strongly encouraged to create a server certificate
1211 at installation time.
1213 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1214 with the $config_file variable.
1216 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1217 in transport context, after the attempt, and per-recipient. The latter type
1218 is per host attempted. The event data is the error message, and the errno
1219 information encodes the lookup type (A vs. MX) used for the (first) host,
1220 and the trailing two digits of the smtp 4xx response.
1222 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1223 to write to mainlog (or rejectlog, paniclog) in the window between file
1224 creation and permissions/ownership being changed. Particularly affects
1225 installations where exicyclog is run as root, rather than exim user;
1226 result is that the running daemon panics and dies.
1228 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1230 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1231 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1232 "pri" and "weight". Note that the previous implicit priority given by the
1233 list order is no longer honoured.
1235 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1236 for DKIM processing.
1238 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1239 by defining SUPPORT_SOCKS.
1241 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1242 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1243 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1244 variables are renamed to proxy_{local,external}_{address,port}.
1246 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1247 for a build by defining SUPPORT_I18N
1249 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1250 of the query string, and make ${quote_redis:} do that quoting.
1252 JH/29 Move Events support from Experimental to mainline, enabled by default
1253 and removable for a build by defining DISABLE_EVENT.
1255 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1257 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1258 cached by the daemon.
1260 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1261 by defining LOOKUP_REDIS. The libhiredis library is required.
1263 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1264 keys are given for lookup.
1266 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1267 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1268 only supported when built with TLS support. The PolarSSL SHA routines
1269 are still used when the TLS library is too old for convenient support.
1271 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1272 openssl_options), for security. OpenSSL forces this from version 1.1.0
1273 server-side so match that on older versions.
1275 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1276 allocation for $value could be released as the expansion processing
1277 concluded, but leaving the global pointer active for it.
1279 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1280 and to use the domains and local_parts ACL conditions.
1282 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1283 incorrectly not doubled on cutthrough transmission, hence seen as a
1284 body-termination at the receiving system - resulting in truncated mails.
1285 Commonly the sender saw a TCP-level error, and retransmitted the message
1286 via the normal store-and-forward channel. This could result in duplicates
1287 received - but deduplicating mailstores were liable to retain only the
1288 initial truncated version.
1290 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1292 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1294 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1295 we're in there, support oversigning also; bug 1309.
1297 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1299 HS/04 Add support for keep_environment and add_environment options.
1301 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1302 either intentional arithmetic overflow during PRNG, or testing config-
1305 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1306 delivery resulted in actual delivery. Cancel cutthrough before DATA
1309 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1310 rejects a recipient: pass the reject to the originator.
1312 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1313 Many were false-positives and ignorable, but it's worth fixing the
1316 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1317 for the new environment-manipulation done at startup. Move the routines
1318 from being local to tls.c to being global via the os.c file.
1320 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1321 an extract embedded as result-arg for a map, the first arg for extract
1322 is unavailable so we cannot tell if this is a numbered or keyed
1323 extraction. Accept either.
1329 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1332 JH/02 The smtp transport option "multi_domain" is now expanded.
1334 JH/03 The smtp transport now requests PRDR by default, if the server offers
1337 JH/04 Certificate name checking on server certificates, when exim is a client,
1338 is now done by default. The transport option tls_verify_cert_hostnames
1339 can be used to disable this per-host. The build option
1340 EXPERIMENTAL_CERTNAMES is withdrawn.
1342 JH/05 The value of the tls_verify_certificates smtp transport and main options
1343 default to the word "system" to access the system default CA bundle.
1344 For GnuTLS, only version 3.0.20 or later.
1346 JH/06 Verification of the server certificate for a TLS connection is now tried
1347 (but not required) by default. The verification status is now logged by
1348 default, for both outbound TLS and client-certificate supplying inbound
1351 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1354 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1355 Status Notification (bounce) messages are now MIME format per RFC 3464.
1356 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1357 under the control of the dsn_advertise_hosts option, and routers may
1358 have a dsn_lasthop option.
1360 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1361 default, modifiable by a malware= option. The list separator for
1362 the options can now be changed in the usual way. Bug 68.
1364 JH/10 The smtp_receive_timeout main option is now expanded before use.
1366 JH/11 The incoming_interface log option now also enables logging of the
1367 local interface on delivery outgoing connections.
1369 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1370 if the interface and destination host and port all match.
1372 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1375 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1376 Patch from Andrew Lewis.
1378 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1379 now supports optional time-restrictions, weighting, and priority
1380 modifiers per server. Patch originally by <rommer@active.by>.
1382 JH/16 The spamd_address main option now supports a mixed list of local
1383 and remote servers. Remote servers can be IPv6 addresses, and
1384 specify a port-range.
1386 JH/17 Bug 68: The spamd_address main option now supports an optional
1387 timeout value per server.
1389 JH/18 Bug 1581: Router and transport options headers_add/remove can
1390 now have the list separator specified.
1392 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1395 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1398 JH/21 Support for the A6 type of dns record is withdrawn.
1400 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1401 rather than the verbs used.
1403 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1404 from 255 to 1024 chars.
1406 JH/24 Verification callouts now attempt to use TLS by default.
1408 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1409 are generic router options now. The defaults didn't change.
1411 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1412 Original patch from Alexander Shikoff, worked over by JH.
1414 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1415 files if ZCAT_COMMAND is not executable.
1417 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1419 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1421 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1422 Normally benign, it bites when the pair was led to by a CNAME;
1423 modern usage is to not canonicalize the domain to a CNAME target
1424 (and we were inconsistent anyway for A-only vs AAAA+A).
1426 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1428 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1429 when evaluating $sender_host_dnssec.
1431 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1432 $sender_helo_dnssec variable.
1434 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1436 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1438 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1440 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1441 documented as working, but never had. Support all but $spam_report.
1443 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1444 added for tls authenticator.
1446 HS/03 Add perl_taintmode main config option
1452 TL/01 When running the test suite, the README says that variables such as
1453 no_msglog_check are global and can be placed anywhere in a specific
1454 test's script, however it was observed that placement needed to be near
1455 the beginning for it to behave that way. Changed the runtest perl
1456 script to read through the entire script once to detect and set these
1457 variables, reset to the beginning of the script, and then run through
1458 the script parsing/test process like normal.
1460 TL/02 The BSD's have an arc4random API. One of the functions to induce
1461 adding randomness was arc4random_stir(), but it has been removed in
1462 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1463 function when detected.
1465 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1466 cause callback expansion.
1468 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1469 syntax errors in an expansion can be treated as a string instead of
1470 logging or causing an error, due to the internal use of bool_lax
1471 instead of bool when processing it.
1473 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1474 server certificates when making smtp deliveries.
1476 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1478 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1480 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1482 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1483 Merged patch from Sebastian Wiedenroth.
1485 JH/05 Fix results-pipe from transport process. Several recipients, combined
1486 with certificate use, exposed issues where response data items split
1487 over buffer boundaries were not parsed properly. This eventually
1488 resulted in duplicates being sent. This issue only became common enough
1489 to notice due to the introduction of connection certificate information,
1490 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1492 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1493 size buffer was used, resulting in syntax errors when an expansion
1496 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1497 version 3.3.6 or later.
1499 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1500 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1501 both become "event_action", the variables become $event_name, $event_data
1502 and $event_defer_errno. There is a new variable $verify_mode, usable in
1503 routers, transports and related events. The tls:cert event is now also
1504 raised for inbound connections, if the main configuration event_action
1507 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1508 early OCSP support, but no stapling (appears to be less than 1.0.0).
1510 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1511 server certificate names available under the smtp transport option
1512 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1515 JH/10 Time-related extraction expansions from certificates now use the main
1516 option "timezone" setting for output formatting, and are consistent
1517 between OpenSSL and GnuTLS compilations. Bug 1541.
1519 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1520 encoded parameter in the incoming message. Bug 1558.
1522 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1523 include certificate info, eximon was claiming there were spoolfile
1526 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1528 JH/14 Log delivery-related information more consistently, using the sequence
1529 "H=<name> [<ip>]" wherever possible.
1531 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1532 are problematic for Debian distribution, omit them from the release
1535 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1537 JH/16 Fix string representation of time values on 64bit time_t architectures.
1540 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1541 output list separator was used.
1546 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1547 checkers that were complaining about end of non-void function with no
1550 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1551 This was a regression introduced in 4.83 by another bugfix.
1553 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1555 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1556 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1562 TF/01 Correctly close the server side of TLS when forking for delivery.
1564 When a message was received over SMTP with TLS, Exim failed to clear up
1565 the incoming connection properly after forking off the child process to
1566 deliver the message. In some situations the subsequent outgoing
1567 delivery connection happened to have the same fd number as the incoming
1568 connection previously had. Exim would try to use TLS and fail, logging
1569 a "Bad file descriptor" error.
1571 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1572 utilities have not been installed.
1574 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1575 temporary space as the ACL may create new global variables.
1577 TL/01 LDAP support uses per connection or global context settings, depending
1578 upon the detected version of the libraries at build time.
1580 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1581 to extract and use the src ip:port in logging and expansions as if it
1582 were a direct connection from the outside internet. PPv2 support was
1583 updated based on HAProxy spec change in May 2014.
1585 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1587 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1588 Properly escape header and check for NULL return.
1590 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1593 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1595 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1596 characters in header names, implemented as a verify condition.
1597 Contributed by Michael Fischer v. Mollard.
1599 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1600 results permerror and temperror. Previous values are deprecated but
1601 still accepted. In a future release, err_perm and err_temp will be
1602 completely removed, which will be a backward incompatibility if the
1603 ACL tests for either of these two old results. Patch contributed by
1604 user bes-internal on the mailing list.
1606 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1608 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1609 selectors, in both main and reject logs.
1611 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1614 JH/07 Add malware type "sock" for talking to simple daemon.
1616 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1618 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1619 routers/transports under cutthrough routing.
1621 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1622 numbers. Touch up "bool" conditional to keep the same definition.
1624 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1626 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1628 JH/12 Expand items in router/transport headers_add or headers_remove lists
1629 individually rather than the list as a whole. Bug 1452.
1631 Required for reasonable handling of multiple headers_ options when
1632 they may be empty; requires that headers_remove items with embedded
1633 colons must have them doubled (or the list-separator changed).
1635 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1636 view the policy declared in the DMARC record. Currently, $dmarc_status
1637 is a combined value of both the record presence and the result of the
1640 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1642 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1643 dnslookup router and the smtp transport (applying to the forward
1646 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1647 of ldap servers used for a specific lookup. Patch provided by Heiko
1650 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1651 New variable $lookup_dnssec_authenticated for observability.
1653 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1654 Patch submitted by Lars Timman.
1656 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1658 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1659 Requires trusted mode and valid format message id, aborts otherwise.
1660 Patch contributed by Heiko Schlichting.
1662 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1663 certextract with support for various fields. Bug 1358.
1665 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1666 is requested by default, modifiable by smtp transport option
1669 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1670 operate on certificate variables to give certificate fingerprints
1671 Also new ${sha256:cert_variable}.
1673 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1675 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1676 Christian Aistleitner.
1678 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1680 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1681 file. Patch from Wolfgang Breyha.
1683 JH/25 Expand the coverage of the delivery $host and $host_address to
1684 client authenticators run in verify callout. Bug 1476.
1686 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1687 align with daemon_smtp_ports. Bug 72.
1689 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1690 support and error reporting did not work properly.
1692 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1693 and is readable. Patch from Andrew Colin Kissa.
1695 TL/14 Enhance documentation of ${run expansion and how it parses the
1696 commandline after expansion, particularly in the case when an
1697 unquoted variable expansion results in an empty value.
1699 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1701 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1702 by renaming away from it. Addresses GH issue 15, reported by
1705 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1707 TL/15 SECURITY: prevent double expansion in math comparison functions
1708 (can expand unsanitized data). Not remotely exploitable.
1715 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1717 PP/02 Make -n do something, by making it not do something.
1718 When combined with -bP, the name of an option is not output.
1720 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1723 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1724 $sender_host_name and config options to manage this, and basic check
1727 PP/05 DSCP support for outbound connections and control modifier for inbound.
1729 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1730 (Only plugin which currently uses this is kerberos4, which nobody should
1731 be using, but we should make it available and other future plugins might
1732 conceivably use it, even though it would break NAT; stuff *should* be
1733 using channel bindings instead).
1735 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1736 name; added for Sendmail compatibility; requires admin caller.
1737 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1738 just ignore it); requires trusted caller.
1739 Also parse but ignore: -Ac -Am -X<logfile>
1742 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1744 TL/02 Add +smtp_confirmation as a default logging option.
1746 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1747 Patch by Magnus Holmgren from 2007-02-20.
1749 TL/04 Bugzilla 1281 - Spec typo.
1750 Bugzilla 1283 - Spec typo.
1751 Bugzilla 1290 - Spec grammar fixes.
1753 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1755 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1757 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1758 mailing list by by Dmitry Isaikin.
1760 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1762 JH/02 Support "G" suffix to numbers in ${if comparisons.
1764 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1766 NM/01 Bugzilla 1197 - Spec typo
1767 Bugzilla 1196 - Spec examples corrections
1769 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1771 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1772 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1775 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1776 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1778 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1779 "acl {{name}{arg}...}", and optional args on acl condition
1782 JH/05 Permit multiple router/transport headers_add/remove lines.
1784 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1786 JH/07 Avoid using a waiting database for a single-message-only transport.
1787 Performance patch from Paul Fisher. Bugzilla 1262.
1789 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1792 JH/09 Add $headers_added variable, with content from use of ACL modifier
1793 add_header (but not yet added to the message). Bugzilla 199.
1795 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1796 Pulled from Bugzilla 817 by Wolfgang Breyha.
1798 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1800 (nb: this is the same fix as in Exim 4.80.1)
1802 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1805 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1808 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1810 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1811 advertise SMTP AUTH mechanism to us, instead of a generic
1812 protocol violation error. Also, make Exim more robust to bad
1813 data from the Dovecot auth socket.
1815 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1817 When a queue runner is handling a message, Exim first routes the
1818 recipient addresses, during which it prunes them based on the retry
1819 hints database. After that it attempts to deliver the message to
1820 any remaining recipients. It then updates the hints database using
1823 So if a recipient address works intermittently, it can get repeatedly
1824 deferred at routing time. The retry hints record remains fresh so the
1825 address never reaches the final cutoff time.
1827 This is a fairly common occurrence when a user is bumping up against
1828 their storage quota. Exim had some logic in its local delivery code
1829 to deal with this. However it did not apply to per-recipient defers
1830 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1832 This change adds a proper retry rule check during routing so that the
1833 final cutoff time is checked against the message's age. We only do
1834 this check if there is an address retry record and there is not a
1835 domain retry record; this implies that previous attempts to handle
1836 the address had the retry_use_local_parts option turned on. We use
1837 this as an approximation for the destination being like a local
1838 delivery, as in LMTP.
1840 I suspect this new check makes the old local delivery cutoff check
1841 redundant, but I have not verified this so I left the code in place.
1843 TF/02 Correct gecos expansion when From: is a prefix of the username.
1845 Test 0254 submits a message to Exim with the header
1849 When I ran the test suite under the user fanf2, Exim expanded
1850 the header to contain my full name, whereas it should have added
1851 a Resent-Sender: header. It erroneously treats any prefix of the
1852 username as equal to the username.
1854 This change corrects that bug.
1856 GF/01 DCC debug and logging tidyup
1857 Error conditions log to paniclog rather than rejectlog.
1858 Debug lines prefixed by "DCC: " to remove any ambiguity.
1860 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1862 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1863 Bug spotted by Jeremy Harris; was flawed since initial commit.
1864 Would have resulted in OCSP responses post-SNI triggering an Exim
1865 NULL dereference and crash.
1867 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1869 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1870 Bug detection, analysis and fix by Samuel Thibault.
1871 Bugzilla 1331, Debian bug #698092.
1873 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1875 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1876 Server implementation by Todd Lyons, client by JH.
1877 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1878 config variable "prdr_enable" controls whether the server
1879 advertises the facility. If the client requests PRDR a new
1880 acl_data_smtp_prdr ACL is called once for each recipient, after
1881 the body content is received and before the acl_smtp_data ACL.
1882 The client is controlled by both of: a hosts_try_prdr option
1883 on the smtp transport, and the server advertisement.
1884 Default client logging of deliveries and rejections involving
1885 PRDR are flagged with the string "PRDR".
1887 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1888 fclose(). Diagnosis by Todd Lyons.
1890 PP/17 Update configure.default to handle IPv6 localhost better.
1891 Patch by Alain Williams (plus minor tweaks).
1894 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1895 This is now consistent with GnuTLS, and is now documented: the
1896 previous undocumented portable approach to treating the option as
1897 unset was to force an expansion failure. That still works, and
1898 an empty string is now equivalent.
1900 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1901 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1902 not performing validation itself.
1904 PP/20 Added force_command boolean option to pipe transport.
1905 Patch from Nick Koston, of cPanel Inc.
1907 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1910 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1912 PP/21 Fix eximon continuous updating with timestamped log-files.
1913 Broken in a format-string cleanup in 4.80, missed when I repaired the
1914 other false fix of the same issue.
1915 Report and fix from Heiko Schlichting.
1918 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1919 Report from Prashanth Katuri.
1921 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1922 It's SecureTransport, so affects any MacOS clients which use the
1923 system-integrated TLS libraries, including email clients.
1925 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1926 using a MIME ACL for non-SMTP local injection.
1927 Report and assistance in diagnosis by Warren Baker.
1929 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1931 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1933 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1934 last id that failed so it may be referenced in subsequent ACL's.
1936 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1939 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1940 ldap library initialization, allowing self-signed CA's to be
1941 used. Also properly sets require_cert option later in code by
1942 using NULL (global ldap config) instead of ldap handle (per
1943 session). Bug diagnosis and testing by alxgomz.
1945 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1946 the src/util/ subdirectory.
1948 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1949 renamed to Transport Post Delivery Action by Jeremy Harris, as
1952 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1953 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1954 redis_servers = needs to be configured which will be used by the redis
1955 lookup. Patch from Warren Baker, of The Packet Hub.
1957 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1959 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1960 hostname or reverse DNS when processing a host list. Used suggestions
1961 from multiple comments on this bug.
1963 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1965 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1966 Missed a few lines, added it to make the runtest require no keyboard
1969 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1970 contains upper case chars. Make router use caseful_local_part.
1972 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1973 support when GnuTLS has been built with p11-kit.
1979 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1981 This, or similar/improved, will also be change PP/11 of 4.82.
1987 PP/01 Handle short writes when writing local log-files.
1988 In practice, only affects FreeBSD (8 onwards).
1989 Bugzilla 1053, with thanks to Dmitry Isaikin.
1991 NM/01 Bugzilla 949 - Documentation tweak
1993 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1996 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1998 PP/02 Implemented gsasl authenticator.
2000 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2002 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2003 `pkg-config foo` for cflags/libs.
2005 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2006 with rest of GSASL and with heimdal_gssapi.
2008 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2009 `pkg-config foo` for cflags/libs for the TLS implementation.
2011 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2012 properties get this fed in as external SSF. A number of robustness
2013 and debugging improvements to the cyrus_sasl authenticator.
2015 PP/08 cyrus_sasl server now expands the server_realm option.
2017 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2018 Patch by Jeremy Harris.
2020 PP/10 Added dbmjz lookup type.
2022 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2024 PP/12 MAIL args handles TAB as well as SP, for better interop with
2025 non-compliant senders.
2026 Analysis and variant patch by Todd Lyons.
2028 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2029 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2030 Patch from Dirk Mueller <dmueller@suse.com>
2032 PP/13 tls_peerdn now print-escaped for spool files.
2033 Observed some $tls_peerdn in wild which contained \n, which resulted
2034 in spool file corruption.
2036 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2037 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2038 or write after TLS renegotiation, which otherwise led to messages
2041 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2042 as a tracking header (ie: a signed header comes before the signature).
2043 Patch from Wolfgang Breyha.
2045 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2046 comma-sep list; embedded commas doubled.
2048 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2050 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2052 Report and patch from Dmitry Banschikov.
2054 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2055 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2056 failures. We appear to now support TLS1.1+ with Exim.
2058 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2059 lets Exim select keys and certificates based upon TLS SNI from client.
2060 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2061 before an outbound SMTP session. New log_selector, +tls_sni.
2063 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2064 NULL dereference. Report and patch from Alun Jones.
2066 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2067 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2068 Not seeing resolver debug output on NetBSD, but suspect this is a
2069 resolver implementation change.
2071 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2072 Left warnings. Added "eximon gdb" invocation mode.
2074 PP/21 Defaulting "accept_8bitmime" to true, not false.
2076 PP/22 Added -bw for inetd wait mode support.
2078 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2079 locate the relevant includes and libraries. Made this the default.
2081 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2082 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2084 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2085 This may cause build issues on older platforms.
2087 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2088 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2089 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2090 Added SNI support via GnuTLS too.
2091 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2093 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2095 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2096 Applied second patch from Janne, implementing suggestion to default
2097 multiple-strings-in-record handling to match SPF spec.
2099 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2101 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2102 read-only, out of scope).
2103 Patch from Wolfgang Breyha, report from Stuart Northfield.
2105 PP/29 Fix three issues highlighted by clang analyser static analysis.
2106 Only crash-plausible issue would require the Cambridge-specific
2107 iplookup router and a misconfiguration.
2108 Report from Marcin Mirosław.
2110 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2112 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2113 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2114 As part of this, removing so much warning spew let me fix some minor
2115 real issues in debug logging.
2117 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2118 assignment on my part. Fixed.
2120 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2121 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2122 Janne Snabb (who went above and beyond: thank you).
2124 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2125 string otherwise requires a connection and a bunch more work and it's
2126 relatively easy to get wrong. Should also expose TLS library linkage
2129 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2130 64-bit ${eval} (JH/03).
2132 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2133 GNU libc to support some of the 64-bit stuff, should not lead to
2134 conflicts. Defined before os.h is pulled in, so if a given platform
2135 needs to override this, it can.
2137 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2138 protection layer was required, which is not implemented.
2139 Bugzilla 1254, patch from Wolfgang Breyha.
2141 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2142 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2143 tls_dhparam take prime identifiers. Also unbreak combination of
2144 OpenSSL+DH_params+TLSSNI.
2146 PP/39 Disable SSLv2 by default in OpenSSL support.
2152 PP/01 Solaris build fix for Oracle's LDAP libraries.
2153 Bugzilla 1109, patch from Stephen Usher.
2155 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2157 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2160 TF/02 Fix a couple more cases where we did not log the error message
2161 when unlink() failed. See also change 4.74-TF/03.
2163 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2164 lock up or crash if it happened to be inside a call to libc when it
2165 got a SIGUSR1 from exiwhat.
2167 The SIGUSR1 handler appends the current process status to the process
2168 log which is later printed by exiwhat. It used to use the general
2169 purpose logging code to do this, but several functions it calls are
2170 not safe for signals.
2172 The new output code in the SIGUSR1 handler is specific to the process
2173 log, and simple enough that it's easy to inspect for signal safety.
2174 Removing some special cases also simplifies the general logging code.
2175 Removing the spurious timestamps from the process log simplifies
2178 TF/04 Improved ratelimit ACL condition.
2180 The /noupdate option has been deprecated in favour of /readonly which
2181 has clearer semantics. The /leaky, /strict, and /readonly update modes
2182 are mutually exclusive. The update mode is no longer included in the
2183 database key; it just determines when the database is updated. (This
2184 means that when you upgrade Exim will forget old rate measurements.)
2186 Exim now checks that the per_* options are used with an update mode that
2187 makes sense for the current ACL. For example, when Exim is processing a
2188 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2189 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2190 must specify per_mail/readonly. If you omit the update mode it defaults to
2191 /leaky where that makes sense (as before) or /readonly where required.
2193 The /noupdate option is now undocumented but still supported for
2194 backwards compatibility. It is equivalent to /readonly except that in
2195 ACLs where /readonly is required you may specify /leaky/noupdate or
2196 /strict/noupdate which are treated the same as /readonly.
2198 A useful new feature is the /count= option. This is a generalization
2199 of the per_byte option, so that you can measure the throughput of other
2200 aggregate values. For example, the per_byte option is now equivalent
2201 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2203 The per_rcpt option has been generalized using the /count= mechanism
2204 (though it's more complicated than the per_byte equivalence). When it is
2205 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2206 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2207 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2208 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2209 Note that using per_rcpt with a non-readonly update mode in more than
2210 one ACL will cause the recipients to be double-counted. (The per_mail
2211 and per_byte options don't have this problem.)
2213 The handling of very low rates has changed slightly. If the computed rate
2214 is less than the event's count (usually one) then this event is the first
2215 after a long gap. In this case the rate is set to the same as this event's
2216 count, so that the first message of a spam run is counted properly.
2218 The major new feature is a mechanism for counting the rate of unique
2219 events. The new per_addr option counts the number of different
2220 recipients that someone has sent messages to in the last time period. It
2221 behaves like per_rcpt if all the recipient addresses are different, but
2222 duplicate recipient addresses do not increase the measured rate. Like
2223 the /count= option this is a general mechanism, so the per_addr option
2224 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2225 example, measure the rate that a client uses different sender addresses
2226 with the options per_mail/unique=$sender_address. There are further
2227 details in the main documentation.
2229 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2231 TF/06 Removed a few PCRE remnants.
2233 TF/07 Automatically extract Exim's version number from tags in the git
2234 repository when doing development or release builds.
2236 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2237 Bugzilla 879. Patch from Paul Fisher.
2239 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2240 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2243 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2245 PP/05 Variable $av_failed, true if the AV scanner deferred.
2246 Bugzilla 1078. Patch from John Horne.
2248 PP/06 Stop make process more reliably on build failure.
2249 Bugzilla 1087. Patch from Heiko Schlittermann.
2251 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2252 Bugzilla 1089. Patch from Heiko Schlittermann.
2254 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2255 Bugzilla 1131. Patch from Holger Weiß.
2257 PP/09 Handle IPv6 addresses with SPF.
2258 Bugzilla 860. Patch from Wolfgang Breyha.
2260 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2262 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2265 PP/11 match_* no longer expand right-hand-side by default.
2266 New compile-time build option, EXPAND_LISTMATCH_RHS.
2267 New expansion conditions, "inlist", "inlisti".
2269 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2271 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2273 PP/14 fix log_write() format string regression from TF/03.
2274 Bugzilla 1152. Patch from Dmitry Isaikin.
2280 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2282 PP/02 Harmonised TLS library version reporting; only show if debugging.
2283 Layout now matches that introduced for other libraries in 4.74 PP/03.
2285 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2287 PP/04 New "dns_use_edns0" global option.
2289 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2292 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2293 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2295 TK/01 Updated PolarSSL code to 0.14.2.
2296 Bugzilla 1097. Patch from Andreas Metzler.
2298 PP/07 Catch divide-by-zero in ${eval:...}.
2299 Fixes bugzilla 1102.
2301 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2304 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2305 format-string attack -- SECURITY: remote arbitrary code execution.
2307 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2308 time unintentionally subject to list matching rules, letting the header
2309 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2310 arbitrary string expansion). This allowed for information disclosure.
2312 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2313 INT_MIN/-1 -- value coerced to INT_MAX.
2319 NM/01 Workaround for PCRE version dependency in version reporting
2322 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2323 This fixes portability to compilers other than gcc, notably
2324 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2326 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2327 makefiles for portability to HP-UX and POSIX correctness.
2329 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2330 Also via indented variable definition in the Makefile.
2331 (Debugging by Oliver Heesakkers).
2333 PP/02 Restore caching of spamd results with expanded spamd_address.
2334 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2336 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2337 Improves build reliability. Fix from: Frank Elsner
2339 NM/02 Fix wide character breakage in the rfc2047 coding
2340 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2342 NM/03 Allow underscore in dnslist lookups
2343 Fixes bug 1026. Patch from Graeme Fowler
2345 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2346 Code patches from Adam Ciarcinski of NetBSD.
2348 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2351 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2352 is logged, to avoid truncation. Patch from John Horne.
2354 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2355 Patch from Jakob Hirsch.
2357 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2358 SQL string expansion failure details.
2359 Patch from Andrey Oktyabrski.
2361 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2362 Patch from Simon Arlott.
2364 PP/09 New lookups functionality failed to compile on old gcc which rejects
2365 extern declarations in function scope.
2366 Patch from Oliver Fleischmann
2368 PP/10 Use sig_atomic_t for flags set from signal handlers.
2369 Check getgroups() return and improve debugging.
2370 Fixed developed for diagnosis in bug 927 (which turned out to be
2373 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2374 Patch from Mark Zealey.
2376 PP/12 Bugzilla 1056: Improved spamd server selection.
2377 Patch from Mark Zealey.
2379 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2380 Based on patch from Heiko Schlittermann.
2382 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2383 Patch from Uwe Doering, sign-off by Michael Haardt.
2385 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2386 variable declaration deep within a block. Bug and patch from
2389 PP/15 lookups-Makefile IRIX compatibility coercion.
2391 PP/16 Make DISABLE_DKIM build knob functional.
2393 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2394 Patch by Simon Arlott
2396 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2397 variable argument macros. Our copy now differs from upstream.
2403 TF/01 Failure to get a lock on a hints database can have serious
2404 consequences so log it to the panic log.
2406 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2407 controlled using the smtp_confirmation log selector.
2409 TF/03 Include the error message when we fail to unlink a spool file.
2411 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2412 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2413 for maintaining out-of-tree patches for some time.
2415 PP/01 Bugzilla 139: Documentation and portability issues.
2416 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2417 Handle per-OS dynamic-module compilation flags.
2419 PP/02 Let /dev/null have normal permissions.
2420 The 4.73 fixes were a little too stringent and complained about the
2421 permissions on /dev/null. Exempt it from some checks.
2422 Reported by Andreas M. Kirchwitz.
2424 PP/03 Report version information for many libraries, including
2425 Exim version information for dynamically loaded libraries. Created
2426 version.h, now support a version extension string for distributors
2427 who patch heavily. Dynamic module ABI change.
2429 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2430 privilege escalation vulnerability whereby the Exim run-time user
2431 can cause root to append content of the attacker's choosing to
2434 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2437 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2438 If dropping privileges for untrusted macros, we disabled normal logging
2439 on the basis that it would fail; for the Exim run-time user, this is not
2440 the case, and it resulted in successful deliveries going unlogged.
2441 Fixed. Reported by Andreas Metzler.
2447 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2448 only prepend for the Resent-* case. Fixes regression introduced in
2449 Exim 4.70 by NM/22 for Bugzilla 607.
2451 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2452 increasing numbers of administrators be bitten by this.
2454 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2456 PP/03 Bugzilla 994: added openssl_options main configuration option.
2458 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2460 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2462 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2464 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2465 without a peer certificate, leading to a segfault because of an
2466 assumption that peers always have certificates. Be a little more
2467 paranoid. Problem reported by Martin Tscholak.
2469 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2470 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2471 NB: ClamAV planning to remove STREAM in "middle of 2010".
2472 CL also introduces -bmalware, various -d+acl logging additions and
2473 more caution in buffer sizes.
2475 PP/09 Implemented reverse_ip expansion operator.
2477 PP/10 Bugzilla 937: provide a "debug" ACL control.
2479 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2481 PP/12 Bugzilla 973: Implement --version.
2483 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2485 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2487 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2489 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2490 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2491 ignore trailing whitespace.
2493 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2495 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2498 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2499 Notification from Dr Andrew Aitchison.
2501 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2502 ExtendedDetectionInfo response format.
2503 Notification from John Horne.
2505 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2508 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2509 XSL and documented dependency on system catalogs, with examples of how
2512 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2515 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2516 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2517 configuration file which is writeable by the Exim user or group.
2519 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2520 of configuration files to cover files specified with the -C option if
2521 they are going to be used with root privileges, not just the default
2524 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2525 option (effectively making it always true).
2527 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2528 files to be used while preserving root privileges.
2530 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2531 that rogue child processes cannot use them.
2533 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2534 run-time user, instead of root.
2536 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2537 Exim run-time user without dropping privileges.
2539 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2540 result string, instead of calling string_vformat() twice with the same
2543 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2544 for other users. Others should always drop root privileges if they use
2545 -C on the command line, even for a whitelisted configure file.
2547 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2549 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2555 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2556 $data_path, and $header_path variables; fixed documentation bugs and
2559 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2560 exipick to access non-standard spools, including the "frozen" queue
2563 NM/01 Bugzilla 965: Support mysql stored procedures.
2564 Patch from Alain Williams
2566 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2568 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2569 Patch from Andreas Metzler
2571 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2572 Patch from Kirill Miazine
2574 NM/05 Bugzilla 671: Added umask to procmail example.
2576 JJ/03 installed exipick 20100323.0, fixing doc bug
2578 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2579 directory. Notification and patch from Dan Rosenberg.
2581 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2583 TK/02 Improve log output when DKIM signing operation fails.
2585 MH/01 Treat the transport option dkim_domain as a colon separated
2586 list, not as a single string, and sign the message with each element,
2587 omitting multiple occurences of the same signer.
2589 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2590 Bugzilla 985, 986. Patch by Simon Arlott
2592 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2593 Patch by Simon Arlott
2595 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2596 MBX locking. Notification from Dan Rosenberg.
2602 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2604 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2606 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2608 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2610 NM/04 Bugzilla 915: Flag broken perl installation during build.
2616 TK/01 Added patch by Johannes Berg that expands the main option
2617 "spamd_address" if it starts with a dollar sign.
2619 TK/02 Write list of recipients to X-Envelope-Sender header when building
2620 the mbox-format spool file for content scanning (suggested by Jakob
2623 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2624 (http://www.dcc-servers.net/) support via dccifd. Activated by
2625 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2627 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2628 by Mark Daniel Reidel <mr@df.eu>.
2630 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2631 When building exim an external PCRE library is now needed -
2632 PCRE is a system library on the majority of modern systems.
2633 See entry on PCRE_LIBS in EDITME file.
2635 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2636 conversation. Added nologin parameter to request.
2637 Patch contributed by Kirill Miazine.
2639 TF/01 Do not log submission mode rewrites if they do not change the address.
2641 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2643 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2644 log files in place. Contributed by Roberto Lima.
2646 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2648 TF/03 Bugzilla 615: When checking the local_parts router precondition
2649 after a local_part_suffix or local_part_prefix option, Exim now
2650 does not use the address's named list lookup cache, since this
2651 contains cached lookups for the whole local part.
2653 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2654 Robert Millan. Documentation is in experimental-spec.txt.
2656 TF/04 Bugzilla 668: Fix parallel build (make -j).
2658 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2660 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2661 Patch provided by Jan Srzednicki.
2663 TF/05 Leading white space used to be stripped from $spam_report which
2664 wrecked the formatting. Now it is preserved.
2666 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2667 that they are available at delivery time.
2669 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2671 TF/08 TLS error reporting now respects the incoming_interface and
2672 incoming_port log selectors.
2674 TF/09 Produce a more useful error message if an SMTP transport's hosts
2675 setting expands to an empty string.
2677 NM/06 Bugzilla 744: EXPN did not work under TLS.
2678 Patch provided by Phil Pennock.
2680 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2681 Patch provided by Richard Godbee.
2683 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2684 acl_smtp_notquit, added index entry.
2686 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2687 Patch provided by Eugene Bujak.
2689 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2690 accept(). Patch provided by Maxim Dounin.
2692 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2693 Patch provided by Phil Pennock.
2695 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2697 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2698 Patch provided by Brad "anomie" Jorsch.
2700 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2701 Patch provided by Dean Brooks.
2703 TK/05 Add native DKIM support (does not depend on external libraries).
2705 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2706 Patch provided by Graeme Fowler.
2708 NM/16 Bugzilla 851: Documentation example syntax fix.
2710 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2712 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2715 NM/19 Bugzilla 745: TLS version reporting.
2716 Patch provided by Phil Pennock.
2718 NM/20 Bugzilla 167: bool: condition support.
2719 Patch provided by Phil Pennock.
2721 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2722 clients. Patch provided by Phil Pennock.
2724 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2725 Patch provided by Brad "anomie" Jorsch.
2727 NM/23 Bugzilla 687: Fix misparses in eximstats.
2728 Patch provided by Heiko Schlittermann.
2730 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2731 Patch provided by Heiko Schlittermann.
2733 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2734 plus update to original patch.
2736 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2738 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2739 Patch provided by David Brownlee.
2741 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2743 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2745 NM/30 Bugzilla 888: TLS documentation bugfixes.
2747 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2749 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2750 Unlike the original bugzilla I have changed all shell scripts in src tree.
2752 NM/33 Bugzilla 898: Transport filter timeout fix.
2753 Patch by Todd Rinaldo.
2755 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2756 Patch by Serge Demonchaux.
2758 NM/35 Bugzilla 39: Base64 decode bug fixes.
2759 Patch by Jakob Hirsch.
2761 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2763 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2765 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2767 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2773 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2774 ALT-N's libdkim that I have put here:
2775 http://duncanthrax.net/exim-experimental/
2777 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2778 were called 'true' and it seems that C99 defines that as a reserved
2779 keyword to be used with 'bool' variable types. That means you could
2780 not include C99-style headers which use bools without triggering
2781 build errors in sieve.c.
2783 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2784 as mailq or other aliases. Changed the --help handling significantly
2785 to do whats expected. exim_usage() emits usage/help information.
2787 SC/01 Added the -bylocaldomain option to eximstats.
2789 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2791 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2793 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2799 PH/01 Another patch from the Sieve maintainer.
2801 PH/02 When an IPv6 address is converted to a string for single-key lookup
2802 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2803 dots are used instead of colons so that keys in lsearch files need not
2804 contain colons. This was done some time before quoting was made available
2805 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2806 (notated using the quote facility) so as to distinguish them from IPv4
2807 keys. This meant that lookups for IP addresses in host lists did not work
2808 for iplsearch lookups.
2810 This has been fixed by arranging for IPv6 addresses to be expressed with
2811 colons if the lookup type is iplsearch. This is not incompatible, because
2812 previously such lookups could never work.
2814 The situation is now rather anomalous, since one *can* have colons in
2815 ordinary lsearch keys. However, making the change in all cases is
2816 incompatible and would probably break a number of configurations.
2818 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2821 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2822 conversion specification without a maximum field width, thereby enabling
2823 a rogue spamd server to cause a buffer overflow. While nobody in their
2824 right mind would setup Exim to query an untrusted spamd server, an
2825 attacker that gains access to a server running spamd could potentially
2826 exploit this vulnerability to run arbitrary code as the Exim user.
2828 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2829 $primary_hostname instead of what libspf2 thinks the hosts name is.
2831 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2832 a directory entry by the name of the lookup key. Previously, if a
2833 symlink pointed to a non-existing file or a file in a directory that
2834 Exim lacked permissions to read, a lookup for a key matching that
2835 symlink would fail. Now it is enough that a matching directory entry
2836 exists, symlink or not. (Bugzilla 503.)
2838 PH/03 The body_linecount and body_zerocount variables are now exported in the
2841 PH/04 Added the $dnslist_matched variable.
2843 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2844 This means they are set thereafter only if the connection becomes
2847 PH/06 Added the client_condition to authenticators so that some can be skipped
2848 by clients under certain conditions.
2850 PH/07 The error message for a badly-placed control=no_multiline_responses left
2851 "_responses" off the end of the name.
2853 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2855 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2856 (without spaces) instead of just copying the configuration text.
2858 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2860 PH/11 Added $max_received_linelength.
2862 PH/12 Added +ignore_defer and +include_defer to host lists.
2864 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2865 way in which PCRE > 7.0 is built.
2867 PH/14 Implemented queue_only_load_latch.
2869 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2870 MAIL command. The effect was to mangle the value on 64-bit systems.
2872 PH/16 Another patch from the Sieve maintainer.
2874 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2876 PH/18 If a system quota error occurred while trying to create the file for
2877 a maildir delivery, the message "Mailbox is full" was not appended to the
2878 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2879 only to a quota excession during the actual writing of the file.
2881 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2882 characters?) which causes problems in log lines. The DN values are now
2883 passed through string_printing() before being added to log lines.
2885 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2886 and InterBase are left for another time.)
2888 PH/21 Added message_body_newlines option.
2890 PH/22 Guard against possible overflow in moan_check_errorcopy().
2892 PH/23 POSIX allows open() to be a macro; guard against that.
2894 PH/24 If the recipient of an error message contained an @ in the local part
2895 (suitably quoted, of course), incorrect values were put in $domain and
2896 $local_part during the evaluation of errors_copy.
2902 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2903 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2906 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2907 issue a MAIL command.
2909 PH/02 In an ACL statement such as
2911 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2913 if a client was not listed at all, or was listed with a value other than
2914 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2915 the condition was not true (as it should be), so access was not denied.
2916 The bug was that the ! inversion was incorrectly passed on to the second
2917 item. This has been fixed.
2919 PH/03 Added additional dnslists conditions == and =& which are different from
2920 = and & when the dns lookup returns more than one IP address.
2922 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2923 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2925 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2926 FSYNC, which compiles an option called disable_fsync that allows for
2927 bypassing fsync(). The documentation is heavily laced with warnings.
2929 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2931 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2932 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2933 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2934 including adding "make clean"; (3) Added -fPIC when compiling the test
2935 dynamically loaded module, to get rid of a warning.
2937 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2938 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2939 = 0s. The bug is otherwise harmless.
2941 PH/07 There was a bug in the dovecot authenticator such that the value of
2942 $auth1 could be overwritten, and so not correctly preserved, after a
2943 successful authentication. This usually meant that the value preserved by
2944 the server_setid option was incorrect.
2946 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2948 PH/09 Installed PCRE release 7.0.
2950 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2951 run for batched SMTP input. It is now run at the start of every message
2952 in the batch. While fixing this I discovered that the process information
2953 (output by running exiwhat) was not always getting set for -bs and -bS
2954 input. This is fixed, and it now also says "batched" for BSMTP.
2956 PH/11 Added control=no_pipelining.
2958 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2959 patch, slightly modified), and move the expansion of helo_data till after
2960 the connection is made in the smtp transport (so it can use these
2963 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2965 PH/14 Added log_selector = +pid.
2967 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2969 PH/16 Add ${if forany and ${if forall.
2971 PH/17 Added dsn_from option to vary the From: line in DSNs.
2973 PH/18 Flush SMTP output before performing a callout, unless control =
2974 no_callout_flush is set.
2976 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2977 was true (the default) a successful delivery failed to delete the retry
2978 item, thus causing premature timeout of the address. The bug is now
2981 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2983 PH/21 Long custom messages for fakedefer and fakereject are now split up
2984 into multiline responses in the same way that messages for "deny" and
2985 other ACL rejections are.
2987 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2988 with slight modification.
2990 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2991 draft, changing the syntax and factoring some duplicate code".
2993 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2994 for deliveries of the second and subsequent messages over the same SMTP
2997 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2998 ${reduce, with only minor "tidies".
3000 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3002 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3003 expansion side effects.
3005 PH/27 When a message times out after an over-quota error from an Exim-imposed
3006 quota, the bounce message says "mailbox is full". This message was not
3007 being given when it was a system quota that was exceeded. It now should
3010 MH/03 Made $recipients available in local_scan(). local_scan() already has
3011 better access to the recipient list through recipients_list[], but
3012 $recipients can be useful in postmaster-provided expansion strings.
3014 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3015 in the case of a MAIL command with additional options following the
3016 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3017 were accidentally chopped off.
3019 PH/29 SMTP synchronization checks are implemented when a command is read -
3020 there is a check that no more input is waiting when there shouldn't be
3021 any. However, for some commands, a delay in an ACL can mean that it is
3022 some time before the response is written. In this time, more input might
3023 arrive, invalidly. So now there are extra checks after an ACL has run for
3024 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3025 pipelining has not been advertised.
3027 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3029 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3030 returned in the SMTP response when smtp_return_error_details was false.
3031 This has been fixed.
3033 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3034 instead of the C I/O that was originally supplied, because problems were
3035 reported on Solaris.
3037 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3038 Exim which did not show up earlier: it was assuming that a call to
3039 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3040 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3041 was a macro that became an assignment, so it seemed to work. This has
3042 changed to a proper function call with a void return, hence the compile
3043 error. Exim's code has been fixed.
3045 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3048 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3050 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3052 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3053 because it turns out to be too big or there is a timeout) there is no
3054 "Completed" line in the log. When some messages of this type were
3055 selected by exigrep, they were listed as "not completed". Others were
3056 picked up by some special patterns. I have improved the selection
3057 criteria to be more general.
3059 PH/38 The host_find_failed option in the manualroute router can now be set
3060 to "ignore", to completely ignore a host whose IP address cannot be
3061 found. If all hosts are ignored, the behaviour is controlled by the new
3062 host_all_ignored option.
3064 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3065 homing or because of multiple MX records with /mx) generated more than
3066 one IP address, and the following item turned out to be the local host,
3067 all the secondary addresses of the first item were incorrectly removed
3068 from the list, along with the local host and any following hosts (which
3069 is what is supposed to happen).
3071 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3072 whoever called Exim into the -H file. In the case of the daemon it was
3073 behaving confusingly. When first started, it used values for whoever
3074 started the daemon, but after a SIGHUP it used the Exim user (because it
3075 calls itself on a restart). I have changed the code so that it now always
3078 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3079 message are rejected with the same error (e.g. no authentication or bad
3080 sender address), and a DATA command is nevertheless sent (as can happen
3081 with PIPELINING or a stupid MUA), the error message that was given to the
3082 RCPT commands is included in the rejection of the DATA command. This is
3083 intended to be helpful for MUAs that show only the final error to their
3086 PH/42 Another patch from the Sieve maintainer.
3088 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3089 Eximstats - Fixed some broken HTML links and added missing column headers
3091 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3092 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3094 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3096 PH/43 Yet another patch from the Sieve maintainer.
3098 PH/44 I found a way to check for a TCP/IP connection going away before sending
3099 the response to the final '.' that terminates a message, but only in the
3100 case where the client has not sent further data following the '.'
3101 (unfortunately, this is allowed). However, in many cases there won't be
3102 any further data because there won't be any more messages to send. A call
3103 to select() can be used: if it shows that the input is "ready", there is
3104 either input waiting, or the socket has been closed. An attempt to read
3105 the next input character can distinguish the two cases. Previously, Exim
3106 would have sent an OK response which the client would never have see.
3107 This could lead to message repetition. This fix should cure that, at
3108 least in a lot of common cases.
3110 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3111 advertised in response to EHLO.
3117 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3118 fixed by 4.65/MH/01 (is this a record?) are fixed:
3120 (i) An empty string was always treated as zero by the numeric comparison
3121 operators. This behaviour has been restored.
3123 (ii) It is documented that the numeric comparison operators always treat
3124 their arguments as decimal numbers. This was broken in that numbers
3125 starting with 0 were being interpreted as octal.
3127 While fixing these problems I realized that there was another issue that
3128 hadn't been noticed. Values of message_size_limit (both the global option
3129 and the transport option) were treated as octal if they started with 0.
3130 The documentation was vague. These values are now always treated as
3131 decimal, and I will make that clear in the documentation.
3137 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3138 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3141 MH/01 Don't check that the operands of numeric comparison operators are
3142 integers when their expansion is in "skipping" mode (fixes bug
3143 introduced by 4.64-PH/07).
3145 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3146 child addresses, Exim now panics and dies. Previously, because the count
3147 is held in a short int, deliveries were likely to be lost. As such a
3148 large number of recipients for a single message is ridiculous
3149 (performance will be very, very poor), I have chosen to impose a limit
3150 rather than extend the field.
3156 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3157 leftover -K file (the existence of which was triggered by #402).
3158 While we were at it, introduced process PID as part of the -K
3159 filename. This should rule out race conditions when creating
3162 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3163 processing considerably. Previous code took too long for large mails,
3164 triggering a timeout which in turn triggers #401.
3166 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3167 in the DK code in transports.c. sendfile() is not really portable,
3168 hence the _LINUX specificness.
3170 TF/01 In the add_headers option to the mail command in an Exim filter,
3171 there was a bug that Exim would claim a syntax error in any
3172 header after the first one which had an odd number of characters
3175 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3176 callout verification, Exim cached a "reject" for the entire domain. This
3177 is correct for most verifications, but it is not correct for a recipient
3178 verification with use_sender or use_postmaster set, because in that case
3179 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3180 case of MAIL FROM:<> rejection from other early rejections (e.g.
3181 rejection of HELO). When verifying a recipient using a non-null MAIL
3182 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3183 Whatever the result of the callout, the value of the domain cache is
3184 left unchanged (for any other kind of callout, getting as far as trying
3185 RCPT means that the domain itself is ok).
3187 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3190 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3191 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3192 session, the daemon ignores ECONNECT errors and logs others; it now
3193 ignores EPIPE as well.
3195 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3196 (quoted-printable decoding).
3198 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3199 later the small subsequent patch to fix an introduced bug.
3201 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3203 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3205 PH/08 An error is now given if message_size_limit is specified negative.
3207 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3208 to be given (somewhat) arbitrary names.
3210 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3213 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3214 miscellaneous code fixes
3216 PH/10 Added the log_reject_target ACL modifier to specify where to log
3219 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3220 hostname. This is wrong, because it relates to the incoming message (and
3221 probably the interface on which it is arriving) and not to the outgoing
3222 callout (which could be using a different interface). This has been
3223 changed to use the value of the helo_data option from the smtp transport
3224 instead - this is what is used when a message is actually being sent. If
3225 there is no remote transport (possible with a router that sets up host
3226 addresses), $smtp_active_hostname is used.
3228 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3229 tweaks were necessary in order to get it to work (see also 21 below):
3230 (a) The code assumed that strncpy() returns a negative number on buffer
3231 overflow, which isn't the case. Replaced with Exim's string_format()
3233 (b) There were several signed/unsigned issues. I just did the minimum
3234 hacking in of casts. There is scope for a larger refactoring.
3235 (c) The code used strcasecmp() which is not a standard C function.
3236 Replaced with Exim's strcmpic() function.
3237 (d) The code set only $1; it now sets $auth1 as well.
3238 (e) A simple test gave the error "authentication client didn't specify
3239 service in request". It would seem that Dovecot has changed its
3240 interface. Fortunately there's a specification; I followed it and
3241 changed what the client sends and it appears to be working now.
3243 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3246 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3247 address A is aliased to B and C, where B exists and C does not. Without
3248 -v the output is "A verified" because verification stops after a
3249 successful redirection if more than one address is generated. However,
3250 with -v the child addresses are also verified. Exim was outputting "A
3251 failed to verify" and then showing the successful verification for C,
3252 with its parentage. It now outputs "B failed to verify", showing B's
3253 parentage before showing the successful verification of C.
3255 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3256 look up a TXT record in a specific list after matching in a combined
3259 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3260 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3261 they consult the DNS. I had assumed they would set it the way they
3262 wanted; and indeed my experiments on Linux seem to show that in some
3263 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3264 To be on the safe side, however, I have now made the interface to
3265 host_find_byname() similar to host_find_bydns(), with an argument
3266 containing the DNS resolver options. The host_find_byname() function now
3267 sets these options at its start, just as host_find_bydns() does. The smtp
3268 transport options dns_qualify_single and dns_search_parents are passed to
3269 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3270 of host_find_byname() use the default settings of RES_DEFNAMES
3271 (qualify_single) but not RES_DNSRCH (search_parents).
3273 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3274 spool_read_header() do less string testing, by means of a preliminary
3275 switch on the second character of optional "-foo" lines. (This is
3276 overdue, caused by the large number of possibilities that now exist.
3277 Originally there were few.) While I was there, I also converted the
3278 str(n)cmp tests so they don't re-test the leading "-" and the first
3279 character, in the hope this might squeeze out yet more improvement.
3281 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3282 flag allowing group syntax was set by the header_syntax check but not
3283 turned off, possible causing trouble later; (2) The flag was not being
3284 set at all for the header_verify test, causing "group"-style headers to
3285 be rejected. I have now set it in this case, and also caused header_
3286 verify to ignore an empty address taken from a group. While doing this, I
3287 came across some other cases where the code for allowing group syntax
3288 while scanning a header line wasn't quite right (mostly, not resetting
3289 the flag correctly in the right place). These bugs could have caused
3290 trouble for malformed header lines. I hope it is now all correct.
3292 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3293 with the "reply" argument non-NULL. The code, however (which originally
3294 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3295 but it didn't always do it. This confused somebody who was copying the
3296 code for some other use. I have removed all the tests.
3298 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3299 feature that was used to support insecure browsers during the U.S. crypto
3300 embargo. It requires special client support, and Exim is probably the
3301 only MTA that supported it -- and would never use it because real RSA is
3302 always available. This code has been removed, because it had the bad
3303 effect of slowing Exim down by computing (never used) parameters for the
3304 RSA_EXPORT functionality.
3306 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3307 authenticator to fail if there's a tab character in the incoming data
3308 (there should never be unless someone is messing about, as it's supposed
3309 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3310 if the connection is using TLS or if the remote IP is the same as the
3311 local IP, and the "valid-client-cert option" if a client certificate has
3314 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3315 authenticators. This can be used for authorization after authentication
3316 succeeds. (In the case of plaintext, it servers for both authentication
3319 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3320 if any retry times were supplied.
3322 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3323 connection, where there is no client IP address to check. In this
3324 situation, the verify now always succeeds.
3326 PH/25 Applied John Jetmore's -Mset patch.
3328 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3330 PH/27 In a string expansion for a processed (not raw) header when multiple
3331 headers of the same name were present, leading whitespace was being
3332 removed from all of them, but trailing whitespace was being removed only
3333 from the last one. Now trailing whitespace is removed from each header
3334 before concatenation. Completely empty headers in a concatenation (as
3335 before) are ignored.
3337 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3338 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3340 PH/29 [Removed. This was a change that I later backed out, and forgot to
3341 correct the ChangeLog entry (that I had efficiently created) before
3342 committing the later change.]
3344 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3345 address errors (4xx response to RCPT) over the same connection as other
3346 messages routed to the same hosts. Such deliveries are always "forced",
3347 so retry times are not inspected. This resulted in far too many retries
3348 for the affected addresses. The effect occurred only when there were more
3349 hosts than the hosts_max_try setting in the smtp transport when it had
3350 the 4xx errors. Those hosts that it had tried were not added to the list
3351 of hosts for which the message was waiting, so if all were tried, there
3352 was no problem. Two fixes have been applied:
3354 (i) If there are any address or message errors in an SMTP delivery, none
3355 of the hosts (tried or untried) are now added to the list of hosts
3356 for which the message is waiting, so the message should not be a
3357 candidate for sending over the same connection that was used for a
3358 successful delivery of some other message. This seems entirely
3359 reasonable: after all the message is NOT "waiting for some host".
3360 This is so "obvious" that I'm not sure why it wasn't done
3361 previously. Hope I haven't missed anything, but it can't do any
3362 harm, as the worst effect is to miss an optimization.
3364 (ii) If, despite (i), such a delivery is accidentally attempted, the
3365 routing retry time is respected, so at least it doesn't keep
3366 hammering the server.
3368 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3369 in ${readsocket because some servers need this prod.
3371 PH/32 Added some extra debug output when updating a wait-xxx database.
3373 PH/33 The hint "could be header name not terminated by colon", which has been
3374 given for certain expansion errors for a long time, was not being given
3375 for the ${if def:h_colon_omitted{... case.
3377 PH/34 The spec says: "With one important exception, whenever a domain list is
3378 being scanned, $domain contains the subject domain." There was at least
3379 one case where this was not true.
3381 PH/35 The error "getsockname() failed: connection reset by peer" was being
3382 written to the panic log as well as the main log, but it isn't really
3383 panic-worthy as it just means the connection died rather early on. I have
3384 removed the panic log writing for the ECONNRESET error when getsockname()
3387 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3388 runs only) independently of the message's sender address. This meant
3389 that, if the 4xx error was in fact related to the sender, a different
3390 message to the same recipient with a different sender could confuse
3391 things. In particular, this can happen when sending to a greylisting
3392 server, but other circumstances could also provoke similar problems.
3393 I have changed the default so that the retry time for these errors is now
3394 based a combination of the sender and recipient addresses. This change
3395 can be overridden by setting address_retry_include_sender=false in the
3398 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3399 remote server are returned as part of bounce messages. This was not
3400 happening for LMTP over a pipe (the lmtp transport), but now it is the
3401 same for both kinds of LMTP.
3403 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3404 in header lines that were in fact CNAMEs. This is no longer the case.
3406 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3407 and queue runs started by the daemon processed all messages. This has
3408 been fixed so that -R and -S can now usefully be given with -q<time>.
3410 PH/40 Import PCRE release 6.7 (fixes some bugs).
3412 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3414 PH/42 Give an error if -q is specified more than once.
3416 PH/43 Renamed the variables $interface_address and $interface_port as
3417 $received_ip_address and $received_port, to make it clear that these
3418 values apply to message reception, and not to the outgoing interface when
3419 a message is delivered. (The old names remain recognized, of course.)
3421 PH/44 There was no timeout on the connect() call when using a Unix domain
3422 socket in the ${readsocket expansion. There now is.
3424 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3425 be meaningful with "accept".
3427 SC/01 Eximstats V1.43
3428 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3430 SC/02 Eximstats V1.44
3431 Use a glob alias rather than an array ref in the generated
3432 parser. This improves both readability and performance.
3434 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3435 Collect SpamAssassin and rejection statistics.
3436 Don't display local sender or destination tables unless
3437 there is data to show.
3438 Added average volumes into the top table text output.
3440 SC/04 Eximstats V1.46
3441 Collect data on the number of addresses (recipients)
3442 as well as the number of messages.
3444 SC/05 Eximstats V1.47
3445 Added 'Message too big' to the list of mail rejection
3446 reasons (thanks to Marco Gaiarin).
3448 SC/06 Eximstats V1.48
3449 Mainlog lines which have GMT offsets and are too short to
3450 have a flag are now skipped.
3452 SC/07 Eximstats V1.49 (Alain Williams)
3453 Added the -emptyok flag.
3455 SC/08 Eximstats V1.50
3456 Fixes for obtaining the IP address from reject messages.
3458 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3459 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3460 whitespace changes from 4.64-PH/27
3462 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3465 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3466 are found, allow negative numbers in numeric criteria)
3468 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3470 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3471 to match changes made in 4.64-PH/43
3473 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3475 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3476 "domain" is actually an IP address, and force a failure. This locks out
3477 those revolvers/nameservers that support "A-for-A" lookups, in
3478 contravention of the specifications.
3480 PH/48 When a host name was looked up from an IP address, and the subsequent
3481 forward lookup of the name timed out, the host name was left in
3482 $sender_host_name, contrary to the specification.
3484 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3485 restricted to single-key lookups, Exim was not diagnosing an error if
3486 * or *@ was used with a query-style lookup.
3488 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3490 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3491 long ago, but noone interested enough thought of it. Let's just say that
3492 the "1.1" means that there are some new functions that weren't there at
3493 some point in the past.
3495 PH/51 Error processing for expansion failure of helo_data from an smtp
3496 transport during callout processing was broken.
3498 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3499 tested/used via the -bh/-bhc/-bs options.
3501 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3502 bug, fixed in subsequent PCRE releases).
3504 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3505 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3507 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3513 SC/01 Use a glob alias rather than an array ref in eximstats generated
3514 parser. This improves both readability and performance.
3516 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3517 Don't display local sender or destination tables in eximstats unless
3518 there is data to show.
3519 Added average volumes into the eximstats top table text output.
3521 SC/03 Collect data on the number of addresses (recipients) as well
3522 as the number of messages in eximstats.
3524 TF/01 Correct an error in the documentation for the redirect router. Exim
3525 does (usually) call initgroups() when daemonizing.
3527 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3528 with consistent privilege compared to when running as a daemon.
3530 TF/03 Note in the spec that $authenticated_id is not set for local
3531 submissions from trusted users.
3533 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3534 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3536 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3537 by adding some example configuration directives to the default
3538 configuration file. A little bit of work is required to uncomment the
3539 directives and define how usernames and passwords are checked, but
3540 there is now a framework to start from.
3542 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3543 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3544 without this. I don't know how relevant this is to other LDAP libraries.
3546 PH/02 Add the verb name to the "unknown ACL verb" error.
3548 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3550 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3552 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3553 directory not expanded when it should be if an expanded home directory
3554 was set for the address (which is overridden by the transport).
3556 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3559 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3560 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3561 because it is too late at that time, and has no effect.
3563 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3564 security issue with \' (bugzilla #107). I could not use the
3565 PQescapeStringConn() function, because it needs a PGconn value as one of
3568 PH/08 When testing addresses using -bt, indicate those final addresses that
3569 are duplicates that would not cause an additional delivery. At least one
3570 person was confused, thinking that -bt output corresponded to deliveries.
3571 (Suppressing duplicates isn't a good idea as you lose the information
3572 about possibly different redirections that led to the duplicates.)
3574 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3575 systems where poll() doesn't work, in particular OS X.
3577 PH/10 Added more information to debugging output for retry time not reached.
3579 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3580 operations in malware.c.
3582 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3585 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3586 syslog_duplication set false, log lines that would normally be written
3587 both the the main log and to the reject log were not written to syslog at
3590 PH/14 In the default configuration, change the use of "message" in ACL warn
3591 statements to "add_header".
3593 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3594 not followed by a command (e.g. "seen endif").
3596 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3597 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3600 PH/17 Added extra conditions to the default value of delay_warning_condition
3604 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3605 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3606 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3609 The Auto-Submitted: and various List- headers are standardised, whereas I
3610 don't think Precedence: ever was.
3612 PH/18 Refactored debugging code in route_finduser() to show more information,
3613 in particular, the error code if getpwnam() issues one.
3615 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3616 This is apparently needed in addition to the PH/07 change above to avoid
3617 any possible encoding problems.
3619 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3620 but not after initializing Perl.
3622 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3623 output them only if debugging. By default they are written stderr,
3624 apparently, which is not desirable.
3626 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3629 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3632 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3634 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3635 authenticated or an ident call has been made. Suppress the default
3636 values for $authenticated_id and $authenticated_sender (but permit -oMai
3637 and -oMas) when testing with -bh.
3639 PH/24 Re-jigged the order of the tests in the default configuration so that the
3640 tests for valid domains and recipients precede the DNS black list and CSA
3641 tests, on the grounds that those ones are more expensive.
3643 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3644 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3645 This bug exists in every version of Exim that I still have, right back to
3648 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3649 However, an attempt to turn on case-sensitivity in a regex key by
3650 including (?-i) didn't work because the subject string was already
3651 lowercased, and the effects were non-intuitive. It turns out that a
3652 one-line patch can be used to allow (?-i) to work as expected.
3658 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3659 other effects) broke the use of negated acl sub-conditions.
3661 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3664 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3665 "Deny" causes Exim to reject the incoming connection with a 554 error.
3666 Unfortunately, if there is a major crisis, such as a disk failure,
3667 tcp-wrappers gives "deny", whereas what one would like would be some
3668 kind of temporary error. A kludge has been added to help with this.
3669 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3670 554 error is used if errno is still zero or contains ENOENT (which occurs
3671 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3674 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3676 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3677 errors. Otherwise a message that provokes a temporary error (when other
3678 messages do not) can cause a whole host to time out.
3680 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3681 addresses were routed directly to files or pipes from a redirect router.
3682 File deliveries just didn't batch; pipe deliveries might have suffered
3685 PH/06 A failure to get a lock for a hints database would erroneously always say
3686 "Failed to get write lock", even when it was really a read lock.
3688 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3689 of 0600. This has been changed to use the value of the lockfile_mode
3690 option (which defaults to 0600).
3692 PH/08 Applied small patch from the Sieve maintainer.
3694 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3695 folder from quota calculations, a direct delivery into this folder messed
3696 up the contents of the maildirsize file. This was because the regex was
3697 used only to exclude .Trash (or whatever) when the size of the mailbox
3698 was calculated. There was no check that a delivery was happening into an
3699 excluded directory. This bug has been fixed by ignoring all quota
3700 processing for deliveries into excluded directories.
3702 PH/10 Added the maildirfolder_create_regex option to appendfile.
3708 PH/01 The code for finding all the local interface addresses on a FreeBSD
3709 system running IPv6 was broken. This may well have applied to all BSD
3710 systems, as well as to others that have similar system calls. The broken
3711 code found IPv4 interfaces correctly, but gave incorrect values for the
3712 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3713 that it would not match correctly against @[] and not recognize the IPv6
3716 PH/02 The ipliteral router was not recognizing addresses of the form user@
3717 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3719 PH/03 Added disable_ipv6.
3721 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3722 decoded form, because it is most often used to construct To: headers
3723 lines in autoreplies, and the decoded form may well be syntactically
3724 invalid. However, $reply_address has leading white space removed, and all
3725 newlines turned into spaces so that the autoreply transport does not
3728 PH/05 If group was specified without a user on a router, and no group or user
3729 was specified on a transport, the group from the router was ignored.
3731 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3732 for visible compile-time settings that can be used to change these
3733 numbers, for those that want even more. Backwards compatibility with old
3734 spool files has been maintained. However, going back to a previous Exim
3735 release will lost any variables that are in spool files.
3737 PH/07 Two small changes when running in the test harness: increase delay when
3738 passing a TCP/IP connection to a new process, in case the original
3739 process has to generate a bounce, and remove special handling of
3740 127.0.0.2 (sic), which is no longer necessary.
3742 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3743 be the same on different OS.
3745 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3748 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3749 whether --show-vars was specified or not
3751 JJ/02 exipick: Added support for new ACL variable spool format introduced
3754 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3755 syntactically invalid From: or Reply-to: line, and a filter used this to
3756 generate an autoreply, and therefore failed to obtain an address for the
3757 autoreply, Exim could try to deliver to a non-existent relative file
3758 name, causing unrelated and misleading errors. What now happens is that
3759 it logs this as a hard delivery error, but does not attempt to create a
3762 PH/11 The exinext utility has a -C option for testing purposes, but although
3763 the given file was scanned by exinext itself; it wasn't being passed on
3764 when Exim was called.
3766 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3767 an end-of-file indication when reading a command response.
3769 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3770 compiled. In many other places in Exim, IPv6 addresses are always
3771 recognized, so I have changed this. It also means that IPv4 domain
3772 literals of the form [IPV4:n.n.n.n] are now always recognized.
3774 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3775 used if the router is not running as root, for example, when verifying at
3776 ACL time, or when using -bh. The debugging output from this situation was
3777 non-existent - all you got was a failure to exec. I have made two
3780 (a) Failures to set uid/gid, the current directory, or a process leader
3781 in a subprocess such as that created by queryprogram now generate
3782 suitable debugging output when -d is set.
3784 (b) The queryprogram router detects when it is not running as root,
3785 outputs suitable debugging information if -d is set, and then runs
3786 the subprocess without attempting to change uid/gid.
3788 PH/15 Minor change to Makefile for building test_host (undocumented testing
3791 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3792 additional section of a DNS packet that returns MX or SRV records.
3793 Instead, it always explicitly searches for A/AAAA records. This avoids
3794 major problems that occur when a DNS server includes only records of one
3795 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3796 fixed another bug: if SRV records were looked up and the corresponding
3797 address records were *not* found in the additional section, the port
3798 values from the SRV records were lost.
3800 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3801 using the correct key (the original address) when searching the retry
3802 rules in order to find which one to use for generating the retry hint.
3804 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3805 adding the default one. Similarly, if it contains a Reply-To: header, the
3806 errors_reply_to option, if set, is not used.
3808 PH/19 When calculating a retry time, Exim used to measure the "time since
3809 failure" by looking at the "first failed" field in the retry record. Now
3810 it does not use this if it is later than than the arrival time of the
3811 message. Instead it uses the arrival time. This makes for better
3812 behaviour in cases where some deliveries succeed, thus re-setting the
3813 "first failed" field. An example is a quota failure for a huge message
3814 when small messages continue to be delivered. Without this change, the
3815 "time since failure" will always be short, possible causing more frequent
3816 delivery attempts for the huge message than are intended.
3817 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3819 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3820 $1, $2, $3) because the numerical variables can be reset during some
3821 expansion items (e.g. "match"), thereby losing the authentication data.
3823 PH/21 Make -bV show the size of off_t variables so that the test suite can
3824 decide whether to run tests for quotas > 2G.
3826 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3827 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3828 filecount value is greater than 2G or if a quota value is greater than 2G
3829 on a system where the size of off_t is not greater than 4, a panic error
3832 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3833 never match. The debug and -bh output now contains an explicit error
3834 message indicating a malformed IPv4 address or mask.
3836 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3837 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3838 PH/23 above applies.
3840 PH/25 Do not write to syslog when running in the test harness. The only
3841 occasion when this arises is a failure to open the main or panic logs
3842 (for which there is an explicit test).
3844 PH/26 Added the /no_tell option to "control=freeze".
3846 PH/27 If a host name lookup failed very early in a connection, for example, if
3847 the IP address matched host_lookup and the reverse lookup yielded a name
3848 that did not have a forward lookup, an error message of the form "no IP
3849 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3850 could be logged. Now it outputs the IP address instead of "NULL".
3852 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3853 allows the sender and the authenticated sender to be set when
3854 submitting a message from within Exim. Since child_open_exim() is
3855 documented for local_scan(), the new function should be too.
3857 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3858 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3859 results in an empty string is now treated as unset.
3861 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3863 PH/31 Added sender_verify_fail logging option.
3865 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3866 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3867 tidied the source and removed it altogether.
3869 PH/33 When a queue run was abandoned because the load average was too high, a
3870 log line was always written; now it is written only if the queue_run log
3871 selector is set. In addition, the log line for abandonment now contains
3872 information about the queue run such as the pid. This is always present
3873 in "start" and "stop" lines but was omitted from the "abandon" line.
3875 PH/34 Omit spaces between a header name and the colon in the error message that
3876 is given when verify = headers_syntax fails (if there are lots of them,
3877 the message gets confusing).
3879 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3880 names, as there are now some PTR records that contain slashes. This check
3881 is only to protect against broken name servers that fall over on strange
3882 characters, so the fact that it applies to all lookups doesn't matter.
3884 PH/36 Now that the new test suite is complete, we can remove some of the
3885 special code in Exim that was needed for the old test suite. For example,
3886 sorting DNS records because real resolvers return them in an arbitrary
3887 order. The new test suite's fake resolver always returns records in the
3890 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3891 bounces) except when queue_only is set, to avoid logging races between
3892 the different processes.
3894 PH/38 Panic-die if .include specifies a non-absolute path.
3896 PH/39 A tweak to the "H" retry rule from its user.
3898 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3899 a label. They prevented compilation on older perls.
3901 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3902 a warning to be raised on newish perls.
3904 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3905 on queue. Changes to match documented behaviour of showing count of
3906 messages matching specified criteria.
3908 PH/40 Changed the default ident timeout from 30s to 5s.
3910 PH/41 Added support for the use of login_cap features, on those BSD systems
3911 that have them, for controlling the resources used by pipe deliveries.
3913 PH/42 The content-scanning code uses fopen() to create files in which to put
3914 message data. Previously it was not paying any attention to the mode of
3915 the files. Exim runs with umask(0) because the rest of the code creates
3916 files with open(), and sets the required mode explicitly. Thus, these
3917 files were ending up world-writeable. This was not a big issue, because,
3918 being within the spool directory, they were not world-accessible. I have
3919 created a function called modefopen, which takes an additional mode
3920 argument. It sets umask(777), creates the file, chmods it to the required
3921 mode, then resets the umask. All the relevant calls to fopen() in the
3922 content scanning code have been changed to use this function.
3924 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3925 to 24 hours. This avoids potential overflow problems when processing G
3926 and H retry rules. I suspect nobody ever tinkers with this value.
3928 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3930 PH/45 When the plaintext authenticator is running as a client, the server's
3931 challenges are checked to ensure they are valid base64 strings. By
3932 default, the authentication attempt is cancelled if an invalid string is
3933 received. Setting client_ignore_invalid_base64 true ignores these errors.
3934 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3935 they are received. Thus, the responses can be made to depend on the
3936 challenges. If an invalid string is ignored, an empty string is placed in
3939 PH/46 Messages that are created by the autoreply transport now contains a
3940 References: header, in accordance with RFCs 2822 and 3834.
3942 PH/47 Added authenticated_sender_force to the smtp transport.
3944 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3946 PH/49 Installed latest patch from the Sieve maintainer.
3948 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3949 was also set, the appendfile transport was unnecessarily scanning a
3950 directory of message files (e.g. for maildir delivery) to find the count
3951 of files (along with the size), even though it did not need this
3952 information. It now does the scan only if it needs to find either the
3953 size of the count of files.
3955 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3957 PH/52 Two bugs concerned with error handling when the smtp transport is
3960 (i) Exim was not creating retry information for temporary errors given
3961 for individual recipients after the DATA command when the smtp transport
3962 was used in LMTP mode. This meant that they could be retried too
3963 frequently, and not timed out correctly.
3965 (ii) Exim was setting the flag that allows error details to be returned
3966 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3967 recipients that were returned after the DATA command.
3969 PH/53 This is related to PH/52, but is more general: for any failing address,
3970 when detailed error information was permitted to be returned to the
3971 sender, but the error was temporary, then after the final timeout, only
3972 "retry timeout exceeded" was returned. Now it returns the full error as
3973 well as "retry timeout exceeded".
3975 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3976 do this, and (what is worse) MTAs that accept it.
3978 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3979 will now be deprecated.
3981 PH/56 New os.c-cygwin from the Cygwin maintainer.
3983 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3984 formats (previously only available in exim formats via -bpr, -bpru,
3985 and -bpra. Now also available in native and exiqgrep formats)
3987 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3988 with very large, slow to parse queues
3990 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3992 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3994 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3995 responses to authentication challenges, though it was showing the
3996 challenges; (ii) I've removed the CR characters from the debug output for
3999 PH/58 Allow for the insertion of a newline as well as a space when a string
4000 is turned into more than one encoded-word during RFC 2047 encoding. The
4001 Sieve code now uses this.
4003 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4004 data_4xx, lost_connection, tls_required.
4006 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4007 message was being sent as an SMTP response.
4009 PH/61 Add -l and -k options to exicyclog.
4011 PH/62 When verifying, if an address was redirected to one new address, so that
4012 verification continued, and the new address failed or deferred after
4013 having set something in $address_data, the value of $address_data was not
4014 passed back to the ACL. This was different to the case when no
4015 redirection occurred. The value is now passed back in both cases.
4017 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4018 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4019 use login_cap.h, so on its own it isn't the distinguishing feature. The
4020 new name refers directly to the setclassresources() function.
4022 PH/65 Added configuration files for NetBSD3.
4024 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4026 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4027 is preferred over IPv4.
4029 PH/68 The bounce_return_message and bounce_return_body options were not being
4030 honoured for bounces generated during the reception of non-SMTP messages.
4031 In particular, this applied to messages rejected by the ACL. This bug has
4032 been fixed. However, if bounce_return_message is true and bounce_return_
4033 body is false, the headers that are returned for a non-SMTP message
4034 include only those that have been read before the error was detected.
4035 (In the case of an ACL rejection, they have all been read.)
4037 PH/69 The HTML version of the specification is now built in a directory called
4038 spec_html instead of spec.html, because the latter looks like a path with
4039 a MIME-type, and this confuses some software.
4041 PH/70 Catch two compiler warnings in sieve.c.
4043 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4044 function verify_get_ident() calls ip_connect() to connect a socket, but
4045 if the "connect()" function timed out, ip_connect() used to close the
4046 socket. However, verify_get_ident() also closes the socket later, and in
4047 between Exim writes to the log, which may get opened at this point. When
4048 the socket was closed in ip_connect(), the log could get the same file
4049 descriptor number as the socket. This naturally causes chaos. The fix is
4050 not to close the socket in ip_connect(); the socket should be closed by
4051 the function that creates it. There was only one place in the code where
4052 this was missing, in the iplookup router, which I don't think anybody now
4053 uses, but I've fixed it anyway.
4055 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4056 well as to direct DNS lookups. Otherwise the handling of names in host
4057 lists is inconsistent and therefore confusing.
4063 PH/01 Two changes to the default runtime configuration:
4065 (1) Move the checks for relay_from_hosts and authenticated clients from
4066 after to before the (commented out) DNS black list checks.
4068 (2) Add control=submission to the relay_from_hosts and authenticated
4069 clients checks, on the grounds that messages accepted by these
4070 statements are most likely to be submissions.
4072 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4074 (1) Generate an error if the third argument for the ${prvs expansion is
4077 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4080 (3) Reset the variables that are obtained from the first argument of
4081 ${prvscheck and used in the second argument before leaving the code,
4082 because their memory is reclaimed, so using them afterwards may do
4085 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4086 one (it's much easier than Tom thought :-).
4088 (5) Because of (4), we can now allow for the use of $prvscheck_result
4089 inside the third argument.
4091 PH/03 For some reason, the default setting of PATH when running a command from
4092 a pipe transport was just "/usr/bin". I have changed it to
4095 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4096 anything to be listed in the output from -bV.
4098 PH/05 When a filter generated an autoreply, the entire To: header line was
4099 quoted in the delivery log line, like this:
4101 => >A.N.Other <ano@some.domain> <original@ddress> ...
4103 This has been changed so that it extracts the operative address. There
4104 may be more than one such address. If so, they are comma-separated, like
4107 => >ano@some.domain,ona@other.domain <original@ddress> ...
4109 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4110 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4111 not being looked up in the rDNS to get a host name, Exim was showing the
4112 IP address twice in Received: lines, even though the IP addresses were
4113 identical. For example:
4115 Received: from [1.2.3.4] (helo=[1.2.3.4])
4117 However, if the real host name was known, it was omitting the HELO data
4118 if it matched the actual IP address. This has been tidied up so that it
4119 doesn't show the same IP address twice.
4121 PH/07 When both +timestamp and +memory debugging was on, the value given by
4122 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4123 called by the debug printing, thereby overwriting the timestamp buffer.
4124 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4126 PH/08 When the original message was included in an autoreply transport, it
4127 always said "this is a copy of the message, including all the headers",
4128 even if body_only or headers_only was set. It now gives an appropriate
4131 PH/09 Applied a patch from the Sieve maintainer which:
4133 o fixes some comments
4134 o adds the (disabled) notify extension core
4135 o adds some debug output for the result of if/elsif tests
4136 o points to the current vacation draft in the documentation
4137 and documents the missing references header update
4141 o fixes a bug in processing the envelope test (when testing
4142 multiple envelope elements, the last element determined the
4145 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4146 Electronic Mail") by including:
4148 Auto-submitted: auto-generated
4150 in the messages that it generates (bounce messages and others, such as
4151 warnings). In the case of bounce messages for non-SMTP messages, there was
4152 also a typo: it was using "Auto_submitted" (underscore instead of
4153 hyphen). Since every message generated by Exim is necessarily in response
4154 to another message, thes have all been changed to:
4156 Auto-Submitted: auto-replied
4158 in accordance with these statements in the RFC:
4160 The auto-replied keyword:
4162 - SHOULD be used on messages sent in direct response to another
4163 message by an automatic process,
4165 - MUST NOT be used on manually-generated messages,
4167 - MAY be used on Delivery Status Notifications (DSNs) and Message
4168 Disposition Notifications (MDNs),
4170 - MUST NOT be used on messages generated by automatic or periodic
4171 processes, except for messages which are automatic responses to
4174 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4175 to the default Received: header definition.
4177 PH/12 Added log selector acl_warn_skipped (default on).
4179 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4180 variables because (a) they are in the wrong storage pool and (b) even if
4181 they were copied, it wouldn't work properly because of the caching.
4183 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4184 checking when decoding. Apparently there are clients that generate
4185 overlong encoded strings. Why am I not surprised?
4187 PH/15 If the first argument of "${if match_address" was not empty, but did not
4188 contain an "@" character, Exim crashed. Now it writes a panic log message
4189 and treats the condition as false.
4191 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4193 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4194 extension "envelope-auth". The code is finished and in agreement with
4195 other implementations, but there is no documentation so far and in fact,
4196 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4197 not changing the active code.
4199 Print executed "if" and "elsif" statements when debugging is used. This
4200 helps a great deal to understand what a filter does.
4202 Document more things not specified clearly in RFC3028. I had all this
4203 sorted out, when out of a sudden new issues came to my mind. Oops."
4205 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4208 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4209 canonical form (as documented). However, after a host name lookup from
4210 the IP address, check_host() was doing a simple string comparison with
4211 addresses acquired from the DNS when checking that the found name did
4212 have the original IP as one of its addresses. Since any found IPv6
4213 addresses are likely to be in abbreviated form, the comparison could
4214 fail. Luckily, there already exists a function for doing the comparison
4215 by converting both addresses to binary, so now that is used instead of
4216 the text comparison.
4218 PH/20 There was another similar case to PH/19, when a complete host name was
4219 given in a host list; looking up its IP address could give an abbreviated
4220 form, whereas the current host's name might or might not be abbreviated.
4221 The same fix has been applied.
4227 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4228 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4231 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4232 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4234 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4236 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4237 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4238 Also, for "Auto-Submitted", treat anything other than "no" as
4239 non-personal, in accordance with RFC 3834. (Previously it treated
4240 anything starting "auto-" as non-personal.)
4242 TF/01 The control=submission/name=... option had a problem with syntax
4243 errors if the name included a slash character. The /name= option
4244 now slurps the rest of the string, so it can include any characters
4245 but it must come last in the list of options (after /sender_retain
4248 PH/05 Some modifications to the interface to the fake nameserver for the new
4256 TK/01 Added the "success_on_redirect" address verification option. See
4257 NewStuff for rationale and an example.
4259 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4261 PH/02 Patch to exigrep to allow it to work on syslog lines.
4263 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4264 fread() to skip over the body file's header line, because in Cygwin the
4265 header line is locked and is inaccessible.
4267 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4268 co-exist for some time) to make it clear that it is the Exim ID that is
4269 referenced, not the Message-ID: header line.
4271 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4272 string_format() function, because snprintf() does not exist on all
4275 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4276 ${stat: expansion item.
4278 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4279 protocol synchronization error", to keep the pedants happy.
4281 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4282 well as for IRIX systems, when gcc is being used. See the host.c source
4285 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4287 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4290 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4291 transport and to the smtp transport in LMTP mode.
4293 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4295 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4296 run a filter in a subprocess. This could lead to confusion in subsequent
4297 lookups in the parent process. There should also be a search_tidyup() at
4298 the end of the subprocess.
4300 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4301 only if the host matched helo_try_verify_hosts, which caused the
4302 verification to occur when the EHLO/HELO command was issued. The ACL just
4303 tested the remembered result. Now, if a previous verification attempt has
4304 not happened, "verify = helo" does it there and then.
4306 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4308 TK/03 Fix log output including CR from clamd.
4310 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4311 exist provoked a memory error which could cause a segfault.
4313 PH/15 Installed PCRE 6.2
4315 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4317 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4318 of the problem. Specifically, suggested +O2 rather than +O1 for the
4321 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4323 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4324 record, the port was not correctly logged when the outgoing_port log
4325 selector was set (it logged the transort's default port).
4327 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4328 fallback_hosts, and "hosts" in the smtp transport.
4330 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4331 host errors such as "Connection refused".
4333 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4334 authentication with radiusclient 0.4.9:
4336 - Error returned from rc_read_config was caught wrongly
4337 - Username/password not passed on to radius server due to wrong length.
4339 The presumption is that some radiusclient API changes for 4.51/PH/17
4340 were not taken care of correctly. The code is still untested by me (my
4341 Linux distribution still has 0.3.2 of radiusclient), but it was
4342 contributed by a Radius user.
4344 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4345 expanding the "port" option of the smtp transport.
4347 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4348 while reading a MIME header. Thanks to Tom Hughes for a patch.
4350 PH/24 Include config.h inside local_scan.h so that configuration settings are
4353 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4354 that in an ACL for RCPT (for example), you can examine exactly what was
4357 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4358 commands, but it was not correctly comparing the address with the actual
4359 client host address. Thus, it would show the EHLO address in Received:
4360 header lines when this was not necessary.
4362 PH/27 Added the % operator to ${eval:}.
4364 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4365 it should be ignoring failures (because with -C, for example, it has lost
4366 privilege). It wasn't ignoring creation failures other than "already
4369 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4372 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4373 because an input line was too long, either on its own, or by virtue of
4374 too many continuations, the temporary file was not being removed, and the
4375 return code was incorrect.
4377 PH/31 Missing "BOOL" in function definition in filtertest.c.
4379 PH/32 Applied Sieve patches from the maintainer.
4381 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4383 PH/33 Added "verify = not_blind".
4385 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4386 Local/Makefile (with some defaults set). These are used in built scripts
4387 such as exicyclog, but they have never been used in the exim_install
4388 script (though there are many overriding facilities there). I have
4389 arranged that the exim_install script now takes note of these two
4392 PH/35 Installed configuration files for Dragonfly.
4394 PH/36 When a locally submitted message by a trusted user did not contain a
4395 From: header, and the sender address was obtained from -f or from an SMTP
4396 MAIL command, and the trusted user did not use -F to supply a sender
4397 name, $originator_name was incorrectly used when constructing a From:
4398 header. Furthermore, $originator_name was used for submission mode
4399 messages from external hosts without From: headers in a similar way,
4400 which is clearly wrong.
4402 PH/37 Added control=suppress_local_fixups.
4404 PH/38 When log_selector = +received_sender was set, and the addition of the
4405 sender made the log line's construction buffer exactly full, or one byte
4406 less than full, an overflow happened when the terminating "\n" was
4409 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4410 when the result of a list match is failure because a DNS lookup failed.
4412 PH/40 RM_COMMAND is now used in the building process.
4414 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4415 the "build-* directories that it finds.
4417 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4418 address in a domain literal was a prefix of an interface address.
4420 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4421 when verifying a sender address, unless rewrite_headers is false.
4423 PH/44 Wrote a long comment about why errors_to addresses are verified as
4424 recipients, not senders.
4426 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4427 the ratelimit ACL was added.
4429 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4431 PH/46 Added extra information about PostgreSQL errors to the error string.
4433 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4434 avoiding the need to install special zones in a real server. This is
4435 backwards compatible; if it can't find the fake resolver, it drops back.
4436 Thus, both old and new test suites can be run.
4438 TF/02 Added util/ratelimit.pl
4440 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4441 clock is set back in time.
4443 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4444 Candler <B.Candler@pobox.com>.
4446 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4447 OK for addresses that are the result of redirections.
4449 PH/48 A number of further additions for the benefit of the new test suite,
4450 including a fake gethostbyname() that interfaces to the fake DNS resolver
4453 TF/06 The fix for widen_domains has also been applied to qualify_single and
4454 search_parents which are the other dnslookup options that can cause
4457 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4460 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4462 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4463 service" if it encountered an MX record with an empty target hostname.
4464 The message is now "an MX or SRV record indicated no SMTP service".
4466 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4467 if the DNS of the sending site is misconfigured. This is quite a
4468 common situation. This change restores the behaviour of treating a
4469 helo verification defer as a failure.
4471 PH/51 If self=fail was set on a router, the bounce message did not include the
4472 actual error message.
4478 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4480 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4481 command itself ended in error, the underlying message about the transport
4482 filter timeout was being overwritten with the pipe command error. Now the
4483 underlying error message should be appended to the second error message.
4485 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4487 PH/02 Reduce the amount of output that "make" produces by default. Full output
4488 can still be requested.
4490 PH/03 The warning log line about a condition test deferring for a "warn" verb
4491 was being output only once per connection, rather than after each
4492 occurrence (because it was using the same function as for successful
4493 "warn" verbs). This seems wrong, so I have changed it.
4495 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4496 it should not have, which might have caused a crash in the right
4497 circumstances, but probably never did.
4499 PH/04 Installed a modified version of Tony Finch's patch to make submission
4500 mode fix the return path as well as the Sender: header line, and to
4501 add a /name= option so that you can make the user's friendly name appear
4504 TF/03 Added the control = fakedefer ACL modifier.
4506 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4507 Mark Lowes for thorough testing.
4509 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4511 TK/03 Merged latest SRS patch from Miles Wilton.
4513 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4514 with the definition in sysexits.h (which is #included earlier).
4515 Fortunately, Exim does not actually use EX_OK. The code used to try to
4516 preserve the sysexits.h value, by assuming that macro definitions were
4517 scanned for macro replacements. I have been disabused of this notion,
4518 so now the code just undefines EX_OK before #including unistd.h.
4520 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4521 in the smtp transport. When a block could not be written in a single
4522 write() function, the timeout was being re-applied to each part-write.
4523 This seems wrong - if the receiver was accepting one byte at a time it
4524 would take for ever. The timeout is now adjusted when this happens. It
4525 doesn't have to be particularly precise.
4527 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4528 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4530 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4531 without a domain if the check to <postmaster@domain> fails.
4533 SC/01 Eximstats: added -xls and the ability to specify output files
4534 (patch written by Frank Heydlauf).
4536 SC/02 Eximstats: use FileHandles for outputting results.
4538 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4540 SC/04 Eximstats: fixed display of large numbers with -nvr option
4542 SC/05 Eximstats: fixed merging of reports with empty tables.
4544 SC/06 Eximstats: added the -include_original_destination flag
4546 SC/07 Eximstats: removed tabs and trailing whitespace.
4548 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4550 TK/06 MBOX spool code: Add real "From " MBOX separator line
4551 so the .eml file is really in mbox format (even though
4552 most programs do not really care). Patch from Alex Miller.
4554 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4555 The latter is generated from $received_to and is only set if the
4556 message has one envelope recipient. SA can use these headers,
4557 obviously out-of-the-box. Patch from Alex Miller.
4559 PH/08 The ${def test on a variable was returning false if the variable's
4560 value was "0", contrary to what the specification has always said!
4561 The result should be true unless the variable is empty.
4563 PH/09 The syntax error of a character other than { following "${if
4564 def:variable_name" (after optional whitespace) was not being diagnosed.
4565 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4566 accidental colon was present, for example, could give incorrect results.
4568 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4569 result is used (not including appendfile, where other changes are about
4572 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4573 This involved changing a lot of size variables from int to off_t. It
4574 should work with maildirs and everything.
4576 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4577 spamd dying while we are connected to it.
4579 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4582 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4583 function for BDB 4.3.
4585 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4587 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4588 the sources for PCRE have been re-arranged and more files are now
4591 PH/15 The code I had for printing potentially long long variables in PH/11
4592 above was not the best (it lost precision). The length of off_t variables
4593 is now inspected at build time, and an appropriate printing format (%ld
4594 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4595 to be "long long int" or "long int". This is needed for the internal
4596 formatting function string_vformat().
4598 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4599 the configuration file to be ":syslog", then the script "guesses" where
4600 the logs files are, rather than using the compiled in default. In our
4601 case the guess is not the same as the compiled default, so the script
4602 suddenly stopped working when I started to use syslog. The patch checks
4603 to see if log_file_path is "". If so, it attempts to read it from exim
4604 with no configuration file to get the compiled in version, before it
4605 falls back to the previous guessing code."
4607 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4608 implementing BATV in an Exim configuration. See NewStuff for the gory
4611 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4612 Makefile that are specific to HP-UX.
4614 PH/18 If the "use_postmaster" option was set for a recipient callout together
4615 with the "random" option, the postmaster address was used as the MAIL
4616 FROM address for the random test, but not for the subsequent recipient
4617 test. It is now used for both.
4619 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4620 patch removes a few documentation additions to RFC 3028, because the
4621 latest draft now contains them. It adds the new en;ascii-case comparator
4622 and a new error check for 8bit text in MIME parts. Comparator and
4623 require names are now matched exactly. I enabled the subaddress
4624 extension, but it is not well tested yet (read: it works for me)."
4626 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4627 rework some of the code of TK/09 above to avoid the hardwired use of
4628 "%lld" and "long long". Replaced the call to snprintf() with a call to
4631 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4632 records point to non-existent hosts", "retry timeout exceeded", and
4633 "retry time not reached for any host after a long failure period".
4635 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4636 experimental DomainKeys support:
4638 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4639 (2) On an error such as an illegally used "control", the wrong name for
4640 the control was given.
4642 These problems did NOT occur unless DomainKeys support was compiled.
4644 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4646 PH/24 Added ${if match_ip condition.
4648 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4649 databases so that it will be absolutely obvious if a crash occurs in the
4650 DB library. This is a regular occurrence (often caused by mis-matched
4653 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4654 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4655 picked up on a user's system that detects such things. There doesn't seem
4656 to be a gcc warning option for this - only an attribute that has to be
4657 put on the function's prototype. It seems that in Fedora Core 4 they have
4658 set this on a number of new functions. No doubt there will be more in due
4661 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4662 specify a transport. However, if an address that was verified by such a
4663 router was the subject of a callout, Exim crashed because it tried to
4664 read the rcpt_include_affixes from the non-existent transport. Now it
4665 just assumes that the setting of that option is false. This bug was
4666 introduced by 4.51/PH/31.
4668 PH/28 Changed -d+all to exclude +memory, because that information is very
4669 rarely of interest, but it makes the output a lot bigger. People tend to
4670 do -d+all out of habit.
4672 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4673 code in os-type was giving problems when libc.so lives in lib64, like on
4676 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4677 aren't the modern standard, and it seems that some systems' include files
4678 don't always have them. Exim was already checking for some of the newer
4679 ones like T_AAAA, and defining it itself. I've added checks for all the
4680 record types that Exim uses.
4682 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4683 not automatically generating a new one, as it is supposed to. This
4684 prevented TLS from working. If the file did exist, but contained invalid
4685 data, a new version was generated, as expected. It was only the case of a
4686 non-existent file that was broken.
4688 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4689 with a change in libdomainkeys > 0.64.
4691 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4692 from DNS. If the selector record carries the flag, it now has
4693 precedence over the domain-wide flag.
4695 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4697 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4698 the use of a port name that isn't defined in /etc/services) occurred, the
4699 message was deferred as in a normal delivery, and thus remained on the
4700 spool, instead of being failed because of the mua_wrapper setting. This
4701 is now fixed, and I tidied up some of the mua_wrapper messages at the
4704 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4705 the messages in a hash of arrays rather than using individual hashes.
4706 This is a bit cleaner and results in dramatic memory savings, albeit
4707 at a slight CPU cost.
4709 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4710 as requested by Marc Sherman.
4712 SC/10 Eximstats: added histograms for user specified patterns as requested
4715 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4717 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4718 fopen() in the content-scanning modules that did not already have it.
4724 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4725 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4727 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4729 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4731 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4732 to test Sieve filters that use "vacation".
4734 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4735 that changes the way the GnuTLS parameters are stored in the cache file.
4736 The new format can be generated externally. For backward compatibility,
4737 if the data in the cache doesn't make sense, Exim assumes it has read an
4738 old-format file, and it generates new data and writes a new file. This
4739 means that you can't go back to an older release without removing the
4742 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4743 work if there are any delivery delays because "one_time" forces the
4744 parent to be marked "delivered", so its unseen clone is never tried
4745 again. For this reason, Exim now forbids the simultaneous setting of
4748 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4749 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4750 entry if you want to know the details. The fix, however, neglected to
4751 consider the case when local delivery batching is involved. The test for
4752 "previously delivered" was not happening when checking to see if an
4753 address could be batched with a previous (undelivered) one; under
4754 certain circumstances this could lead to multiple deliveries to the same
4757 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4758 in its include files, and this causes problems building Exim.
4760 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4761 header_syntax) but Exim was just ignoring anything given after a slash.
4762 In particular, this caused confusion with an attempt to use "verify =
4763 reverse_host_lookup/defer_ok". An error is now given when options are
4764 supplied for verify items that do not have them. (Maybe reverse_host_
4765 lookup should have a defer_ok option, but that's a different point.)
4767 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4768 defined by RFC 821) to 2048, because there were problems with some AUTH
4769 commands, and RFC 1869 says the size should be increased for extended
4770 SMTP commands that take arguments.
4772 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4775 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4776 "unknown" error; now it says that the functionality isn't in the binary.
4778 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4779 an address' error message when a string expansion fails (syntax or
4780 whatever). Otherwise the password may appear in the log. Following change
4781 PH/42 below, there is no longer a chance of it appearing in a bounce
4784 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4786 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4787 of its addresses was ever tried. (Bugzilla bug #2.)
4789 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4790 the result incorrectly in the debug output. (It correctly added a newline
4791 to what was transported.)
4793 TF/01 Added $received_time.
4795 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4796 commented out examples of how to interface to a virus scanner and to
4797 SpamAssassin. Also added commented examples of av_scanner and
4798 spamd_address settings.
4800 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4801 and controls are allowed in which ACLs. There were a couple of minor
4802 errors. Some of the entries in the conditions table (which is a table of
4803 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4804 negation of where the condition IS allowed.
4806 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4808 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4809 header file does not have a version number, so I've had to invent a new
4810 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4811 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4812 radiusclient), but it was contributed by a Radius user.
4814 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4815 files or directories, for OpenSSL.
4817 PH/19 When an Exim process that is running as root has to create an Exim log
4818 file, it does so in a subprocess that runs as exim:exim so as to get the
4819 ownership right at creation (otherwise, other Exim processes might see
4820 the file with the wrong ownership). There was no test for failure of this
4821 fork() call, which would lead to the process getting stuck as it waited
4822 for a non-existent subprocess. Forks do occasionally fail when resources
4823 run out. I reviewed all the other calls to fork(); they all seem to check
4826 PH/20 When checking for unexpected SMTP input at connect time (before writing
4827 the banner), Exim was not dealing correctly with a non-positive return
4828 from the read() function. If the client had disconnected by this time,
4829 the result was a log entry for a synchronization error with an empty
4830 string after "input=" when read() returned zero. If read() returned -1
4831 (an event I could not check), uninitialized data bytes were printed.
4832 There were reports of junk text (parts of files, etc) appearing after
4835 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4837 PH/22 Added support for macro redefinition, and (re)definition in between
4838 driver and ACL definitions.
4840 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4841 forgetting to use the resulting value; it was using the unexpanded value.
4843 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4844 hadn't been configured. The fix is from Juergen Kreileder, who
4845 understands it better than I do:
4847 "Here's what I see happening with three configured cyrus_sasl
4848 authenticators configured (plain, login, cram-md5):
4850 On startup auth_cyrus_sasl_init() gets called for each of these.
4851 This means three calls to sasl_listmech() without a specified mech_list.
4852 => SASL tests which mechs of all available mechs actually work
4853 => three warnings about OTP not working
4854 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4856 With the patch, sasl_listmech() also gets called three times. But now
4857 SASL's mech_list option is set to the server_mech specified in the the
4858 authenticator. Or in other words, the answer from sasl_listmech()
4859 gets limited to just the mech you're testing for (which is different
4861 => the return list contains just 'plain' or 'login', 'cram-md5' or
4862 nothing depending on the value of ob->server_mech.
4864 I've just tested the patch: Authentication still works fine,
4865 unavailable mechs specified in the exim configuration are still
4866 caught, and the auth.log warnings about OTP are gone."
4868 PH/25 When debugging is enabled, the contents of the command line are added
4869 to the debugging output, even when log_selector=+arguments is not
4872 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4873 answer is "GNU", and only if the return is "GNU/something" is the answer
4876 PH/27 $acl_verify_message is now set immediately after the failure of a
4877 verification in an ACL, and so is available in subsequent modifiers. In
4878 particular, the message can be preserved by coding like this:
4880 warn !verify = sender
4881 set acl_m0 = $acl_verify_message
4883 Previously, $acl_verify_message was set only while expanding "message"
4884 and "log_message" when a very denied access.
4886 PH/28 Modified OS/os.c-Linux with
4888 -#ifndef OS_LOAD_AVERAGE
4889 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4891 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4892 nomenclature these days.)
4894 PH/29 Installed patch from the Sieve maintainer that adds the options
4895 sieve_useraddress and sieve_subaddress to the redirect router.
4897 PH/30 In these circumstances:
4898 . Two addresses routed to the same list of hosts;
4899 . First host does not offer TLS;
4900 . First host accepts first address;
4901 . First host gives temporary error to second address;
4902 . Second host offers TLS and a TLS session is established;
4903 . Second host accepts second address.
4904 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4905 and peerdn, if requested) that were in fact used only for the second
4908 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4909 attention to any local part prefix or suffix that was matched by the
4910 router that accepted the address. It now behaves in the same way as it
4911 does for delivery: the affixes are removed from the local part unless
4912 rcpt_include_affixes is set on the transport.
4914 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4915 timeout during the DATA phase of an incoming message.
4917 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4918 applied a patch sanctioned by the Sieve maintainer.
4920 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4921 the uid or gid is negative. A case of a negative gid caused this to be
4922 noticed. The fix allows for either to be negative.
4924 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4925 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4928 PH/36 The change PH/12 above was broken. Fixed it.
4930 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4931 the grounds that routing the same address twice would always produce the
4932 same answer. This might have been true once, but it is certainly no
4933 longer true now. Routing a child address may depend on the previous
4934 routing that produced that child. Some complicated redirection strategies
4935 went wrong when messages had multiple recipients, and made Exim's
4936 behaviour dependent on the order in which the addresses were given.
4938 I have moved the duplicate checking until after the routing is complete.
4939 Exim scans the addresses that are assigned to local and remote
4940 transports, and removes any duplicates. This means that more work will be
4941 done, as duplicates will always all be routed, but duplicates are
4942 presumably rare, so I don't expect this is of any significance.
4944 For deliveries to pipes, files, and autoreplies, the duplicate checking
4945 still happens during the routing process, since they are not going to be
4948 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4949 It corrects a timeout issue with spamd. This is Ian's comment: "The
4950 background is that sometimes spamd either never reads data from a
4951 connection it has accepted, or it never writes response data. The exiscan
4952 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4953 blindly assumes that writes won't block so it may never time out."
4955 PH/39 Allow G after quota size as well as K and M.
4957 PH/40 The value set for $authenticated_id in an authenticator may not contain
4958 binary zeroes or newlines because the value is written to log lines and
4959 to spool files. There was no check on this. Now the value is run through
4960 the string_printing() function so that such characters are converted to
4961 printable escape sequences.
4963 PH/41 $message_linecount is a new variable that contains the total number of
4964 lines in the message. Compare $body_linecount, which is the count for the
4967 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4968 bounce and delay warning messages, except in certain special cases, which
4971 (a) An SMTP error message from a remote host;
4972 (b) A message specified in a :fail: redirection;
4973 (c) A message specified in a "fail" command in a system filter;
4974 (d) A message specified in a FAIL return from the queryprogram router;
4975 (e) A message specified by the cannot_route_message router option.
4977 In these cases only, Exim does include the error details in bounce and
4978 warning messages. There are also a few cases where bland messages such
4979 as "unrouteable address" or "local delivery error" are given.
4981 PH/43 $value is now also set for the "else" part of a ${run expansion.
4983 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4984 being worked on, but at least Exim now implements the latest version to
4987 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4988 process to complete was treated as a delivery failure, a timeout while
4989 writing the message to the pipe was logged, but erroneously treated as a
4990 successful delivery. Such timeouts include transport filter timeouts. For
4991 consistency with the overall process timeout, these timeouts are now
4992 treated as errors, giving rise to delivery failures by default. However,
4993 there is now a new Boolean option for the pipe transport called
4994 timeout_defer, which, if set TRUE, converts the failures into defers for
4995 both kinds of timeout. A transport filter timeout is now identified in
4998 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4999 systems where "make" and "gmake" are different, calling "gmake" at top
5000 level broke things. I've arranged for the value of $(MAKE) to be passed
5001 from the Makefile to this script so that it can call the same version of
5005 A note about Exim versions 4.44 and 4.50
5006 ----------------------------------------
5008 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5009 changes of various kinds. As a consequence, a big documentation update was
5010 needed. This delayed the release for rather longer than seemed good, especially
5011 in the light of a couple of (minor) security issues. Therefore, the changes
5012 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5013 release. So 4.44 and 4.50 are in effect two different branches that both start
5016 I have left the 4.50 change log unchanged; it contains all the changes since
5017 4.43. The change log for 4.44 is below; many of its items are identical to
5018 those for 4.50. This seems to be the most sensible way to preserve the
5019 historical information.
5025 1. Minor wording change to the doc/README.SIEVE file.
5027 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5028 computation of the current number of files was incorrect.
5030 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5031 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5034 4. Give more explanation in the error message when the command for a transport
5035 filter fails to execute.
5037 5. There are several places where Exim runs a non-Exim command in a
5038 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5039 was being done only for the command run by the queryprogram router. It is
5040 now done for all such subprocesses. The other cases are: ${run, transport
5041 filters, and the commands run by the lmtp and pipe transports.
5043 6. Added CONFIGURE_GROUP build-time option.
5045 7. Some older OS have a limit of 256 on the maximum number of file
5046 descriptors. Exim was using setrlimit() to set 1000 as a large value
5047 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5048 systems. I've change it so that if it can't get 1000, it tries for 256.
5050 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5051 was an oversight, and furthermore, ever since the addition of extra
5052 controls (e.g. 4.43/32), the checks on when to allow different forms of
5053 "control" were broken. There should now be diagnostics for all cases when a
5054 control that does not make sense is encountered.
5056 9. Added the /retain_sender option to "control=submission".
5058 10. $recipients is now available in the predata ACL (oversight).
5060 11. Tidy the search cache before the fork to do a delivery from a message
5061 received from the command line. Otherwise the child will trigger a lookup
5062 failure and thereby defer the delivery if it tries to use (for example) a
5063 cached ldap connection that the parent has called unbind on.
5065 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5066 of $address_data from the recipient verification was clobbered by the
5067 sender verification.
5069 13. The value of address_data from a sender verification is now available in
5070 $sender_address_data in subsequent conditions in the ACL statement.
5072 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5074 15. Added a new option "connect=<time>" to callout options, to set a different
5077 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5078 was its contents. (It was OK if the option was not defined at all.)
5080 17. A "Completed" log line is now written for messages that are removed from
5081 the spool by the -Mrm option.
5083 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5084 information about exactly what failed.
5086 19. Added -dd to debug only the daemon process.
5088 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5089 handles timeouts, both on the server side and network timeouts. Renamed the
5090 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5092 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5093 It is now set to "smtps".
5095 22. $host_address is now set to the target address during the checking of
5096 ignore_target_hosts.
5098 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5099 being passed; this would have caused $sender_host_name to have been used if
5100 matching the list had actually called for a host name (not very likely,
5101 since this list is usually IP addresses). A host name is now passed as
5104 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5105 code that specifies a non-restarting handler (typically sigaction() in
5106 modern systems) in an attempt to fix a rare and obscure crash bug.
5108 25. Narrowed the window for a race in the daemon that could cause it to ignore
5109 SIGCHLD signals. This is not a major problem, because they are used only to
5110 wake it up if nothing else does.
5112 26. A malformed maildirsize file could cause Exim to calculate negative values
5113 for the mailbox size or file count. Odd effects could occur as a result.
5114 The maildirsize information is now recalculated if the size or filecount
5117 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5118 support for a long time. Removed HAVE_SYS_VFS_H.
5120 28. Installed the latest version of exipick from John Jetmore.
5122 29. In an address list, if the pattern was not a regular expression, an empty
5123 subject address (from a bounce message) matched only if the pattern was an
5124 empty string. Non-empty patterns were not even tested. This was the wrong
5125 because it is perfectly reasonable to use an empty address as part of a
5126 database query. An empty address is now tested by patterns that are
5127 lookups. However, all the other forms of pattern expect the subject to
5128 contain a local part and a domain, and therefore, for them, an empty
5129 address still always fails if the pattern is not itself empty.
5131 30. Exim went into a mad DNS loop when attempting to do a callout where the
5132 host was specified on an smtp transport, and looking it up yielded more
5133 than one IP address.
5135 31. Re-factored the code for checking spool and log partition space into a
5136 function that finds that data and another that does the check. The former
5137 is then used to implement four new variables: $spool_space, $log_space,
5138 $spool_inodes, and $log_inodes.
5140 32. The RFC2047 encoding function was originally intended for short strings
5141 such as real names; it was not keeping to the 75-character limit for
5142 encoded words that the RFC imposes. It now respects the limit, and
5143 generates multiple encoded words if necessary. To be on the safe side, I
5144 have increased the buffer size for the ${rfc2047: expansion operator from
5147 33. It is now permitted to omit both strings after an "if" condition; if the
5148 condition is true, the result is "true". As before, when the second string
5149 is omitted, a false condition yields an empty string. This makes it less
5150 cumbersome to write custom ACL and router conditions.
5152 34. Failure to deliver a bounce message always caused it to be frozen, even if
5153 there was an errors_to setting on the router. The errors_to setting is now
5156 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5157 canonical form (fully expanded) before being placed in
5158 $sender_host_address.
5160 36. The table in the code that translates DNS record types into text (T_A to
5161 "A" for instance) was missing entries for NS and CNAME. It is just possible
5162 that this could have caused confusion if both these types were looked up
5163 for the same domain, because the text type is used as part of Exim's
5164 per-process caching. But the chance of anyone hitting this buglet seems
5167 37. The dnsdb lookup has been extended in a number of ways.
5169 (1) There is a new type, "zns", which walks up the domain tree until it
5170 finds some nameserver records. It should be used with care.
5172 (2) There is a new type, "mxh", which is like "mx" except that it returns
5173 just the host names, not the priorities.
5175 (3) It is now possible to give a list of domains (or IP addresses) to be
5176 looked up. The behaviour when one of the lookups defers can be
5177 controlled by a keyword.
5179 (4) It is now possible to specify the separator character for use when
5180 multiple records are returned.
5182 38. The dnslists ACL condition has been extended: it is now possible to supply
5183 a list of IP addresses and/or domains to be looked up in a particular DNS
5186 39. Added log_selector=+queue_time_overall.
5188 40. When running the queue in the test harness, wait just a tad after forking a
5189 delivery process, to get repeatability of debugging output.
5191 41. Include certificate and key file names in error message when GnuTLS fails
5192 to set them up, because the GnuTLS error message doesn't include the name
5193 of the failing file when there is a problem reading it.
5195 42. Allow both -bf and -bF in the same test run.
5197 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5199 44. The "Exiscan patch" is now merged into the mainline Exim source.
5201 45. Sometimes the final signoff response after QUIT could fail to get
5202 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5203 < 0 before doing a fflush(). This bug looks as though it goes back to the
5204 introduction of TLS in release 3.20, but "sometimes" must have been rare
5205 because the tests only now provoked it.
5207 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5208 (this can affect the format of dates).
5210 47. exim_tidydb, when checking for the continued existence of a message for
5211 which it has found a message-specific retry record, was not finding
5212 messages that were in split spool directories. Consequently, it was
5213 deleting retry records that should have stayed in existence.
5215 48. Steve fixed some bugs in eximstats.
5217 49. The SPA authentication driver was not abandoning authentication and moving
5218 on to the next authenticator when an expansion was forced to fail,
5219 contradicting the general specification for all authenticators. Instead it
5220 was generating a temporary error. It now behaves as specified.
5222 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5223 (the order specifies the preference for clients). The order is now AES256,
5224 AES128, 3DES, ARCFOUR128.
5226 51. Small patch to Sieve code - explicitly set From: when generating an
5229 52. Exim crashed if a remote delivery caused a very long error message to be
5230 recorded - for instance if somebody sent an entire SpamAssassin report back
5231 as a large number of 550 error lines. This bug was coincidentally fixed by
5232 increasing the size of one of Exim's internal buffers (big_buffer) that
5233 happened as part of the Exiscan merge. However, to be on the safe side, I
5234 have made the code more robust (and fixed the comments that describe what
5237 53. Now that there can be additional text after "Completed" in log lines (if
5238 the queue_time_overall log selector is set), a one-byte patch to exigrep
5239 was needed to allow it to recognize "Completed" as not the last thing in
5242 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5243 patch that reportedly fixes this has been added. I am not expert enough to
5244 create a test for it. This is what the patch creator wrote:
5246 "I found a little strange behaviour of ldap code when working with
5247 Windows 2003 AD Domain, where users was placed in more than one
5248 Organization Units. When I tried to give exim partial DN, the exit code
5249 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5250 But simultaneously result of request was absolutely normal ldap result,
5251 so I produce this patch..."
5253 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5254 REFERENCE, so I have modified the code to exclude the patch when that macro
5257 55. Some experimental protocols are using DNS PTR records for new purposes. The
5258 keys for these records are domain names, not reversed IP addresses. The
5259 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5260 leaves it alone. Component reversal etc. now happens only for IP addresses.
5263 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5265 57. Double the size of the debug message buffer (to 2048) so that more of very
5266 long debug lines gets shown.
5268 58. The exicyclog utility now does better if the number of log files to keep
5269 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5271 59. Two changes related to the smtp_active_hostname option:
5273 (1) $smtp_active_hostname is now available as a variable.
5274 (2) The default for smtp_banner uses $smtp_active_hostname instead
5275 of $primary_hostname.
5277 60. The host_aton() function is supposed to be passed a string that is known
5278 to be a valid IP address. However, in the case of IPv6 addresses, it was
5279 not checking this. This is a hostage to fortune. Exim now panics and dies
5280 if the condition is not met. A case was found where this could be provoked
5281 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5282 components; fortuitously, this particular loophole had already been fixed
5283 by change 4.50/55 above.
5285 If there are any other similar loopholes, the new check in host_aton()
5286 itself should stop them being exploited. The report I received stated that
5287 data on the command line could provoke the exploit when Exim was running as
5288 exim, but did not say which command line option was involved. All I could
5289 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5290 running as the user.
5293 61. There was a buffer overflow vulnerability in the SPA authentication code
5294 (which came originally from the Samba project). I have added a test to the
5295 spa_base64_to_bits() function which I hope fixes it.
5298 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5299 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5301 63. The daemon start-up calls getloadavg() while still root for those OS that
5302 need the first call to be done as root, but it missed one case: when
5303 deliver_queue_load_max is set with deliver_drop_privilege. This is
5304 necessary for the benefit of the queue runner, because there is no re-exec
5305 when deliver_drop_privilege is set.
5307 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5308 This has been fixed.
5310 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5311 was in use, was not putting the data itself into the right store pool;
5312 consequently, it could be overwritten for a subsequent message in the same
5313 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5316 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5318 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5319 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5320 the function were treating the return as a boolean value, which happened to
5321 work because 0=false and not-0=true, but is not correct code.
5323 68. The host_aton() function was not handling scoped IPv6 addresses (those
5324 with, for example, "%eth0" on the end) correctly.
5326 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5327 negated items (that is, ~something) in unsigned ints. Some compilers
5328 apparently mutter when there is no cast.
5330 70. If an address verification called from an ACL failed, and did not produce a
5331 user-specific message (i.e. there was only a "system" message), nothing was
5332 put in $acl_verify_message. In this situation, it now puts the system
5335 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5336 session; change 4.31/43 added the unwanted input to the log line - except
5337 that it did not do this in the start of session case. It now does.
5339 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5340 This is wrong and can cause the other end to generate a synchronization
5341 error if it is another Exim or anything else that does the synchronization
5342 check. A QUIT command is no longer sent after a timeout.
5344 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5345 during host lookups.
5347 74. The defer_ok option of callout verification was not working if it was used
5348 when verifying addresses in header lines, that is, for this case:
5350 verify = header_sender/callout=defer_ok
5352 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5353 those file descriptors could be used for SMTP connections. If anything
5354 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5355 could be sent to the SMTP client, causing chaos. The daemon now opens
5356 stdin, stdout, and stderr to /dev/null when it puts itself into the
5359 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5360 log by default. The user can override this with suitable Perl magic.
5362 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5363 the log message when discard triggers, was not working for the DATA ACL or
5364 for the non-SMTP ACL.
5366 78. Error message wording change in sieve.c.
5368 79. If smtp_accept_max_per_host was set, the number of connections could be
5369 restricted to fewer than expected, because the daemon was trying to set up
5370 a new connection before checking whether the processes handling previous
5371 connections had finished. The check for completed processes is now done
5372 earlier. On busy systems, this bug wouldn't be noticed because something
5373 else would have woken the daemon, and it would have reaped the completed
5376 80. If a message was submitted locally by a user whose login name contained one
5377 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5378 It caused a spool format error. I have fixed the spool reading code. A
5379 related problem was that the "from" clause in the Received: line became
5380 illegal because of the space(s). It is now covered by ${quote_local_part.
5382 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5385 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5387 83. Patch from Sieve maintainer to fix unterminated string problem in
5388 "vacation" handling.
5390 84. Some minor changes to the Linux configuration files to help with other
5391 OS variants using glibc.
5393 85. One more patch for Sieve to update vacation handling to latest spec.
5396 ----------------------------------------------------
5397 See the note above about the 4.44 and 4.50 releases.
5398 ----------------------------------------------------
5404 1. Change 4.43/35 introduced a bug that caused file counts to be
5405 incorrectly computed when quota_filecount was set in an appendfile
5408 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5409 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5412 3. Give more explanation in the error message when the command for a transport
5413 filter fails to execute.
5415 4. There are several places where Exim runs a non-Exim command in a
5416 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5417 was being done only for the command run by the queryprogram router. It is
5418 now done for all such subprocesses. The other cases are: ${run, transport
5419 filters, and the commands run by the lmtp and pipe transports.
5421 5. Some older OS have a limit of 256 on the maximum number of file
5422 descriptors. Exim was using setrlimit() to set 1000 as a large value
5423 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5424 systems. I've change it so that if it can't get 1000, it tries for 256.
5426 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5427 was an oversight, and furthermore, ever since the addition of extra
5428 controls (e.g. 4.43/32), the checks on when to allow different forms of
5429 "control" were broken. There should now be diagnostics for all cases when a
5430 control that does not make sense is encountered.
5432 7. $recipients is now available in the predata ACL (oversight).
5434 8. Tidy the search cache before the fork to do a delivery from a message
5435 received from the command line. Otherwise the child will trigger a lookup
5436 failure and thereby defer the delivery if it tries to use (for example) a
5437 cached ldap connection that the parent has called unbind on.
5439 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5440 of $address_data from the recipient verification was clobbered by the
5441 sender verification.
5443 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5444 was its contents. (It was OK if the option was not defined at all.)
5446 11. A "Completed" log line is now written for messages that are removed from
5447 the spool by the -Mrm option.
5449 12. $host_address is now set to the target address during the checking of
5450 ignore_target_hosts.
5452 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5453 being passed; this would have caused $sender_host_name to have been used if
5454 matching the list had actually called for a host name (not very likely,
5455 since this list is usually IP addresses). A host name is now passed as
5458 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5459 code that specifies a non-restarting handler (typically sigaction() in
5460 modern systems) in an attempt to fix a rare and obscure crash bug.
5462 15. Narrowed the window for a race in the daemon that could cause it to ignore
5463 SIGCHLD signals. This is not a major problem, because they are used only to
5464 wake it up if nothing else does.
5466 16. A malformed maildirsize file could cause Exim to calculate negative values
5467 for the mailbox size or file count. Odd effects could occur as a result.
5468 The maildirsize information is now recalculated if the size or filecount
5471 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5472 support for a long time. Removed HAVE_SYS_VFS_H.
5474 18. Updated exipick to current release from John Jetmore.
5476 19. Allow an empty sender to be matched against a lookup in an address list.
5477 Previously the only cases considered were a regular expression, or an
5480 20. Exim went into a mad DNS lookup loop when doing a callout where the
5481 host was specified on the transport, if the DNS lookup yielded more than
5484 21. The RFC2047 encoding function was originally intended for short strings
5485 such as real names; it was not keeping to the 75-character limit for
5486 encoded words that the RFC imposes. It now respects the limit, and
5487 generates multiple encoded words if necessary. To be on the safe side, I
5488 have increased the buffer size for the ${rfc2047: expansion operator from
5491 22. Failure to deliver a bounce message always caused it to be frozen, even if
5492 there was an errors_to setting on the router. The errors_to setting is now
5495 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5496 canonical form (fully expanded) before being placed in
5497 $sender_host_address.
5499 24. Updated eximstats to version 1.33
5501 25. Include certificate and key file names in error message when GnuTLS fails
5502 to set them up, because the GnuTLS error message doesn't include the name
5503 of the failing file when there is a problem reading it.
5505 26. Expand error message when OpenSSL has problems setting up cert/key files.
5508 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5509 (this can affect the format of dates).
5511 28. exim_tidydb, when checking for the continued existence of a message for
5512 which it has found a message-specific retry record, was not finding
5513 messages that were in split spool directories. Consequently, it was
5514 deleting retry records that should have stayed in existence.
5516 29. eximstats updated to version 1.35
5517 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5518 1.35 - bugfix such that pie charts by volume are generated correctly
5520 30. The SPA authentication driver was not abandoning authentication and moving
5521 on to the next authenticator when an expansion was forced to fail,
5522 contradicting the general specification for all authenticators. Instead it
5523 was generating a temporary error. It now behaves as specified.
5525 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5526 (the order specifies the preference for clients). The order is now AES256,
5527 AES128, 3DES, ARCFOUR128.
5529 31. Small patch to Sieve code - explicitly set From: when generating an
5532 32. Exim crashed if a remote delivery caused a very long error message to be
5533 recorded - for instance if somebody sent an entire SpamAssassin report back
5534 as a large number of 550 error lines. This bug was coincidentally fixed by
5535 increasing the size of one of Exim's internal buffers (big_buffer) that
5536 happened as part of the Exiscan merge. However, to be on the safe side, I
5537 have made the code more robust (and fixed the comments that describe what
5540 33. Some experimental protocols are using DNS PTR records for new purposes. The
5541 keys for these records are domain names, not reversed IP addresses. The
5542 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5543 leaves it alone. Component reversal etc. now happens only for IP addresses.
5546 34. The host_aton() function is supposed to be passed a string that is known
5547 to be a valid IP address. However, in the case of IPv6 addresses, it was
5548 not checking this. This is a hostage to fortune. Exim now panics and dies
5549 if the condition is not met. A case was found where this could be provoked
5550 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5551 components; fortuitously, this particular loophole had already been fixed
5552 by change 4.50/55 or 4.44/33 above.
5554 If there are any other similar loopholes, the new check in host_aton()
5555 itself should stop them being exploited. The report I received stated that
5556 data on the command line could provoke the exploit when Exim was running as
5557 exim, but did not say which command line option was involved. All I could
5558 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5559 running as the user.
5562 35. There was a buffer overflow vulnerability in the SPA authentication code
5563 (which came originally from the Samba project). I have added a test to the
5564 spa_base64_to_bits() function which I hope fixes it.
5567 36. The daemon start-up calls getloadavg() while still root for those OS that
5568 need the first call to be done as root, but it missed one case: when
5569 deliver_queue_load_max is set with deliver_drop_privilege. This is
5570 necessary for the benefit of the queue runner, because there is no re-exec
5571 when deliver_drop_privilege is set.
5573 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5574 was in use, was not putting the data itself into the right store pool;
5575 consequently, it could be overwritten for a subsequent message in the same
5576 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5579 38. Sometimes the final signoff response after QUIT could fail to get
5580 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5581 < 0 before doing a fflush(). This bug looks as though it goes back to the
5582 introduction of TLS in release 3.20, but "sometimes" must have been rare
5583 because the tests only now provoked it.
5589 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5590 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5591 Now it returns an integer. A number of calls were still expecting a T/F
5592 return. Fortuitously, in all cases, the tests worked in OK situations,
5593 which is the norm. However, things would have gone wrong on any write
5594 failures on the smtp file descriptor. This function is used when sending
5595 messages over SMTP and also when doing verify callouts.
5597 2. When Exim is called to do synchronous delivery of a locally submitted
5598 message (the -odf or -odi options), it no longer closes stderr before doing
5601 3. Implemented the mua_wrapper option.
5603 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5605 5. Implemented the functions header_remove(), header_testname(),
5606 header_add_at_position(), and receive_remove_recipient(), and exported them
5609 6. If an ACL "warn" statement specified the addition of headers, Exim already
5610 inserted X-ACL-Warn: at the start if there was no header name. However, it
5611 was not making this test for the second and subsequent header lines if
5612 there were newlines in the string. This meant that an invalid header could
5613 be inserted if Exim was badly configured.
5615 7. Allow an ACL "warn" statement to add header lines at the start or after all
5616 the Received: headers, as well as at the end.
5618 8. Added the rcpt_4xx retry error code.
5620 9. Added postmaster_mailfrom=xxx to callout verification option.
5622 10. Added mailfrom=xxxx to the callout verification option, for verify=
5625 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5626 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5628 12. Inserted some casts to stop certain compilers warning when using pointer
5629 differences as field lengths or precisions in printf-type calls (mostly
5630 affecting debugging statements).
5632 13. Added optional readline() support for -be (dynamically loaded).
5634 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5635 same clock tick as a message's arrival, so that its received time was the
5636 same as the "first fail" time on the retry record, and that message
5637 remained on the queue past the ultimate address timeout, every queue runner
5638 would try a delivery (because it was past the ultimate address timeout) but
5639 after another failure, the ultimate address timeout, which should have then
5640 bounced the address, did not kick in. This was a "< instead of <=" error;
5641 in most cases the first failure would have been in the next clock tick
5642 after the received time, and all would be well.
5644 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5645 being recognized when the domain list was tested by the match_domain
5646 condition in an expansion string.
5648 16. Added the ${str2b64: operator.
5650 17. Exim was always calling setrlimit() to set a large limit for the number of
5651 processes, without checking whether the existing limit was already
5652 adequate. (It did check for the limit on file descriptors.) Furthermore,
5653 errors from getrlimit() and setrlimit() were being ignored. Now they are
5654 logged to the main and panic logs, but Exim does carry on, to try to do its
5655 job under whatever limits there are.
5657 18. Imported PCRE 5.0.
5659 19. Trivial typo in log message " temporarily refused connection" (the leading
5662 20. If the log selector return_path_on_delivery was set and an address was
5663 redirected to /dev/null, the delivery process crashed because it assumed
5664 that a return path would always be set for a "successful" delivery. In this
5665 case, the whole delivery is bypassed as an optimization, and therefore no
5668 21. Internal re-arrangement: the function for sending a challenge and reading
5669 a response while authentication was assuming a zero-terminated challenge
5670 string. It's now changed to take a pointer and a length, to allow for
5671 binary data in such strings.
5673 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5675 23. Exim was not respecting finduser_retries when seeking the login of the
5676 uid under which it was called; it was always trying 10 times. (The default
5677 setting of finduser_retries is zero.) Also, it was sleeping after the final
5678 failure, which is pointless.
5680 24. Implemented tls_on_connect_ports.
5682 25. Implemented acl_smtp_predata.
5684 26. If the domain in control=submission is set empty, Exim assumes that the
5685 authenticated id is a complete email address when it generates From: or
5686 Sender: header lines.
5688 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5689 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5690 chown and chgrp in /bin and hostname in /usr/bin.
5692 28. Exim was keeping the "process log" file open after each use, just as it
5693 does for the main log. This opens the possibility of it remaining open for
5694 long periods when the USR1 signal hits a daemon. Occasional processlog
5695 errors were reported, that could have been caused by this. Anyway, it seems
5696 much more sensible not to leave this file open at all, so that is what now
5699 29. The long-running daemon process does not normally write to the log once it
5700 has entered its main loop, and it closes the log before doing so. This is
5701 so that log files can straightforwardly be renamed and moved. However,
5702 there are a couple of unusual error situations where the daemon does write
5703 log entries, and I had neglected to close the log afterwards.
5705 30. The text of an SMTP error response that was received during a remote
5706 delivery was being truncated at 512 bytes. This is too short for some of
5707 the long messages that one sometimes sees. I've increased the limit to
5710 31. It is now possible to make retry rules that apply only when a message has a
5711 specific sender, in particular, an empty sender.
5713 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5714 it possible to be selective about when SMTP synchronization is enforced.
5716 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5718 32. Implemented hosts_connection_nolog.
5720 33. Added an ACL for QUIT.
5722 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5725 35. Added mailbox_size and mailbox_filecount to appendfile.
5727 36. Added control = no_multiline_responses to ACLs.
5729 37. There was a bug in the logic of the code that waits for the clock to tick
5730 in the case where the clock went backwards by a substantial amount such
5731 that the microsecond fraction of "now" was more than the microsecond
5732 fraction of "then" (but the whole seconds number was less).
5734 38. Added support for the libradius Radius client library this is found on
5735 FreeBSD (previously only the radiusclient library was supported).
5741 1. When certain lookups returned multiple values in the form name=value, the
5742 quoting of the values was not always being done properly. Specifically:
5743 (a) If the value started with a double quote, but contained no whitespace,
5745 (b) If the value contained whitespace other than a space character (i.e.
5746 tabs or newlines or carriage returns) it was not quoted.
5747 This fix has been applied to the mysql and pgsql lookups by writing a
5748 separate quoting function and calling it from the lookup code. The fix
5749 should probably also be applied to nisplus, ibase and oracle lookups, but
5750 since I cannot test any of those, I have not disturbed their existing code.
5752 2. A hit in the callout cache for a specific address caused a log line with no
5753 reason for rejecting RCPT. Now it says "Previous (cached) callout
5754 verification failure".
5756 3. There was an off-by-one bug in the queryprogram router. An over-long
5757 return line was truncated at 256 instead of 255 characters, thereby
5758 overflowing its buffer with the terminating zero. As well as fixing this, I
5759 have increased the buffer size to 1024 (and made a note to document this).
5761 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5762 when Exim is waiting for an SMTP response from a remote server, Exim
5763 restarts its select() call on the socket, thereby resetting its timeout.
5764 This is not a problem when such interrupts are rare. Somebody set up a cron
5765 job to run exiwhat every 2 minutes, which is less than the normal select()
5766 timeout (5 or 10 minutes). This meant that the select() timeout never
5767 kicked in because it was always reset. I have fixed this by comparing the
5768 time when an interrupt arrives with the time at the start of the first call
5769 to select(). If more time than the timeout has elapsed, the interrupt is
5770 treated as a timeout.
5772 5. Some internal re-factoring in preparation for the addition of Sieve
5773 extensions (by MH). In particular, the "personal" test is moved to a
5774 separate function, and given an option for scanning Cc: and Bcc: (which is
5775 not set for Exim filters).
5777 6. When Exim created an email address using the login of the caller as the
5778 local part (e.g. when creating a From: or Sender: header line), it was not
5779 quoting the local part when it contained special characters such as @.
5781 7. Installed new OpenBSD configuration files.
5783 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5784 try to make them clearer.
5786 9. Callout options, other than the timeout value, were being ignored when
5787 verifying sender addresses in header lines. For example, when using
5789 verify = header_sender/callout=no_cache
5791 the cache was (incorrectly) being used.
5793 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5794 only the Cygwin environment.
5796 11. When return_path_on_delivery was set as a log selector, if different remote
5797 addresses in the same message used different return paths and parallel
5798 remote delivery occurred, the wrong values would sometimes be logged.
5799 (Whenever a remote delivery process finished, the return path value from
5800 the most recently started remote delivery process was logged.)
5802 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5803 lines when AUTH and/or TLS are in use. This is the "received protocol"
5804 field. Exim used to use "asmtp" for authenticated SMTP, without any
5805 indication (in the protocol name) for TLS use. Now it follows the RFC and
5806 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5807 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5808 names appear in log lines as well as in Received: header lines.
5810 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5811 extensions, and comparison tests, and to fix some bugs.
5813 14. Changes to the "personal" filter test:
5815 (1) The test was buggy in that it was just doing the equivalent of
5816 "contains" tests on header lines. For example, if a user's address was
5817 anne@some.where, the "personal" test would incorrectly be true for
5819 To: susanne@some.where
5821 This test is now done by extracting each address from the header in turn,
5822 and checking the entire address. Other tests that are part of "personal"
5823 are now done using regular expressions (for example, to check local parts
5824 of addresses in From: header lines).
5826 (2) The list of non-personal local parts in From: addresses has been
5827 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5828 taken from the Sieve specification recommendations.
5830 (3) If the message contains any header line starting with "List-" it is
5831 treated as non-personal.
5833 (4) The test for "circular" in the Subject: header line has been removed
5834 because it now seems ill-conceived.
5836 15. Minor typos in src/EDITME comments corrected.
5838 16. Installed latest exipick from John Jetmore.
5840 17. If headers_add on a router specified a text string that was too long for
5841 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5842 of string_sprintf() is now avoided.
5844 18. $message_body_size was not set (it was always zero) when running the DATA
5845 ACL and the local_scan() function.
5847 19. For the "mail" command in an Exim filter, no default was being set for
5848 the once_repeat time, causing a random time value to be used if "once" was
5849 specified. (If the value happened to be <= 0, no repeat happened.) The
5850 default is now 0s, meaning "never repeat". The "vacation" command was OK
5851 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5852 (I found it when inspecting the code).
5854 20. There is now an overall timeout for performing a callout verification. It
5855 defaults to 4 times the callout timeout, which applies to individual SMTP
5856 commands during the callout. The overall timeout applies when there is more
5857 than one host that can be tried. The timeout is checked before trying the
5858 next host. This prevents very long delays if there are a large number of
5859 hosts and all are timing out (e.g. when the network connections are timing
5860 out). The value of the overall timeout can be changed by specifying an
5861 additional sub-option for "callout", called "maxwait". For example:
5863 verify = sender/callout=5s,maxwait=20s
5865 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5866 to the end before writing, but this should make it even safer).
5868 22. Exim was forgetting that it had advertised PIPELINING for the second and
5869 subsequent messages on an SMTP connection. It was also not resetting its
5870 memory on STARTTLS and an internal HELO.
5872 23. When Exim logs an SMTP synchronization error within a session, it now
5873 records whether PIPELINING has been advertised or not.
5875 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5876 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5877 rather than long int.
5879 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5881 26. Added the never_mail option to autoreply.
5887 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5888 crash if the getsockname() call failed; this can happen if a connection is
5889 closed very soon after it is established. The problem was simply in the
5890 order in which certain operations were done, causing Exim to try to write
5891 to the SMTP stream before it had set up the file descriptor. The bug has
5892 been fixed by making things happen in the correct order.
5898 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5899 before the connection was closed, thus losing the rejection response.
5901 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5902 some early Solaris releases, but causes trouble in current releases where
5903 socklen_t is defined.
5905 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5908 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5911 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5912 that releasing the top of it at the end releases what was used for sub-
5913 expansions (unless the block got too big). However, discard this block if
5914 the first thing is a variable or header, so that we can use its block when
5915 it is dynamic (useful for very large $message_headers, for example).
5917 6. Lookups now cache *every* query, not just the most recent. A new, separate
5918 store pool is used for this. It can be recovered when all lookup caches are
5919 flushed. Lookups now release memory at the end of their result strings.
5920 This has involved some general refactoring of the lookup sources.
5922 7. Some code has been added to the store_xxx() functions to reduce the amount
5923 of flapping under certain conditions.
5925 8. log_incoming_interface used to affect only the <= reception log lines. Now
5926 it causes the local interface and port to be added to several more SMTP log
5927 lines, for example "SMTP connection from", and rejection lines.
5929 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5931 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5933 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5934 could be overwritten at the end of the current message (or the start of a
5935 new message if it was set in a HELO ACL). The value is now preserved for
5936 the duration of the SMTP connection.
5938 12. If a transport had a headers_rewrite setting, and a matching header line
5939 contained an unqualified address, that address was qualified, even if it
5940 did not match any rewriting rules. The underlying bug was that the values
5941 of the flags that permit the existence of unqualified sender and recipient
5942 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5943 non-local messages, and by -bnq for local messages) were not being
5944 preserved with the message after it was received.
5946 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5947 "next input=" as part of the text comprising the host identity instead of
5948 the correct text. The code was using the same buffer for two different
5949 strings. However, depending on which order the printing function evaluated
5950 its arguments, the bug did not always show up. Under Linux, for example, my
5951 test suite worked just fine.
5953 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5954 doesn't work with some older versions of Perl. It has been changed to "my",
5955 which in any case is probably the better facility to use.
5957 15. A really picky compiler found some instances of statements for creating
5958 error messages that either had too many or two few arguments for the format
5961 16. The size of the buffer for calls to the DNS resolver has been increased
5962 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5963 for addresses that have a lot of PTR records. This alleviates a problem; it
5964 does not fully solve it.
5966 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5967 buffer now truncates the list and logs the incident, which is the same
5968 action as happens when Exim is looking up a host name and its aliases.
5969 Previously in this situation something unpredictable would happen;
5970 sometimes it was "internal error: store_reset failed".
5972 18. If a server dropped the connection unexpectedly when an Exim client was
5973 using GnuTLS and trying to read a response, the client delivery process
5974 crashed while trying to generate an error log message.
5976 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5977 string, for example:
5979 warn message = H1: something\nH2: something
5981 the text was added as a single header line from Exim's point of view
5982 though it ended up OK in the delivered message. However, searching for the
5983 second and subsequent header lines using $h_h2: did not work. This has been
5984 fixed. Similarly, if a system filter added multiple headers in this way,
5985 the routers could not see them.
5987 20. Expanded the error message when iplsearch is called with an invalid key to
5988 suggest using net-iplsearch in a host list.
5990 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5991 ACLs are no longer actually imposed (and a message to that effect is
5994 22. If a "gecos" field in a passwd entry contained escaped characters, in
5995 particular, if it contained a \" sequence, Exim got it wrong when building
5996 a From: or a Sender: header from that name. A second bug also caused
5997 incorrect handling when an unquoted " was present following a character
5998 that needed quoting.
6000 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6001 was not being matched caselessly.
6003 24. Arranged for all hyphens in the exim.8 source to be escaped with
6006 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6007 properly. Recipient callout cache records were still being keyed to include
6008 the sender, even when use_sender was set false. This led to far more
6009 callouts that were necessary. The sender is no longer included in the key
6010 when use_sender is false.
6012 26. Added "control = submission" modifier to ACLs.
6014 27. Added the ${base62d: operator to decode base 62 numbers.
6016 28. dnsdb lookups can now access SRV records.
6018 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6019 the configuration file.
6021 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6022 (-v) mode. This makes the output for a verbose queue run more intelligible.
6024 31. Added a use_postmaster feature to recipient callouts.
6026 32. Added the $body_zerocount variable, containing the number of binary zero
6027 bytes in the message body.
6029 33. The time of last modification of the "new" subdirectory is now used as the
6030 "mailbox time last read" when there is a quota error for a maildir
6033 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6035 35. Added +ignore_unknown as a special item in host lists.
6037 36. Code for decoding IPv6 addresses in host lists is now included, even if
6038 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6039 address was recognized as an IP address, but was then not correctly decoded
6040 into binary, causing unexpected and incorrect effects when compared with
6047 1. Very minor rewording of debugging text in manualroute to say "list of
6048 hosts" instead of "hostlist".
6050 2. If verify=header_syntax was set, and a header line with an unqualified
6051 address (no domain) and a large number of spaces between the end of the
6052 name and the colon was received, the reception process suffered a buffer
6053 overflow, and (when I tested it) crashed. This was caused by some obsolete
6054 code that should have been removed. The fix is to remove it!
6056 3. When running in the test harness, delay a bit after writing a bounce
6057 message to get a bit more predictability in the log output.
6059 4. Added a call to search_tidyup() just before forking a reception process. In
6060 theory, someone could use a lookup in the expansion of smtp_accept_max_
6061 per_host which, without the tidyup, could leave open a database connection.
6063 5. Added the variables $recipient_data and $sender_data which get set from a
6064 lookup success in an ACL "recipients" or "senders" condition, or a router
6065 "senders" option, similar to $domain_data and $local_part_data.
6067 6. Moved the writing of debug_print from before to after the "senders" test
6070 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6071 problems for message scanning, either using a data ACL, or using
6072 local_scan() because the Received: header was not generated till after they
6073 were called (in order to set the time as the time of reception completion).
6074 I have revised the way this works. The header is now generated after the
6075 body is received, but before the ACL or local_scan() are called. After they
6076 are run, the timestamp in the header is updated.
6082 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6083 before starting a queue runner without re-exec. This happened only when
6084 deliver_drop_privilege was set or when the Exim user was set to root. The
6085 effect of the bug was that timeouts during subsequent deliveries caused
6086 crashes instead of being properly handled. The handler is now left at its
6087 default (and expected) setting.
6089 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6090 message, again when deliver_drop_privilege is set or Exim is run as root.
6091 The bug described in (1) was not present in this case, but the tidying up
6092 of the other signals was missing. I have made the two cases consistent.
6094 3. The ignore_target_hosts setting on a manualroute router was being ignored
6095 for hosts that were looked up using the /MX notation.
6097 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6100 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6101 operated on the sender address. After changing the $sender_address to <>
6102 for the sender address verify, Exim was re-instated it as the original
6103 (before rewriting) address, but remembering that it had rewritten it, so it
6104 wasn't rewriting it again. This bug also had the effect of breaking the
6105 sender address verification caching when the sender address was rewritten.
6107 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6108 This has been changed so that if the ip literal address matches
6109 ignore_target_hosts, the router declines.
6111 7. Added expansion conditions match_domain, match_address, and match_local_
6112 part (NOT match_host).
6114 8. The placeholder for the Received: header didn't have a length field set.
6116 9. Added code to Exim itself and to exim_lock to test for a specific race
6117 condition that could lead to file corruption when using MBX delivery. The
6118 issue is with the lockfile that is created in /tmp. If this file is removed
6119 after a process has opened it but before that process has acquired a lock,
6120 there is the potential for a second process to recreate the file and also
6121 acquire a lock. This could lead to two Exim processes writing to the file
6122 at the same time. The added code performs the same test as UW imapd; it
6123 checks after acquiring the lock that its file descriptor still refers to
6124 the same named file.
6126 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6127 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6130 11. Added the smtp_active_hostname option. If used, this will typically be made
6131 to depend on the incoming interface address. Because $interface_address is
6132 not set up until the daemon has forked a reception process, error responses
6133 that can happen earlier (such as "too many connections") no longer contain
6136 12. If an expansion in a condition on a "warn" statement fails because a lookup
6137 defers, the "warn" statement is abandoned, and the next ACL statement is
6138 processed. Previously this caused the whole ACL to be aborted.
6140 13. Added the iplsearch lookup type.
6142 14. Added ident_timeout as a log selector.
6144 15. Added tls_certificate_verified as a log selector.
6146 16. Added a global option tls_require_ciphers (compare the smtp transport
6147 option of the same name). This controls incoming TLS connections.
6149 17. I finally figured out how to make tls_require_ciphers do a similar thing
6150 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6151 before starting the TLS session.
6153 18. Tabs are now shown as \t in -bP output.
6155 19. If the log selector return_path_on_delivery was set, Exim crashed when
6156 bouncing a message because it had too many Received: header lines.
6158 20. If two routers both had headers_remove settings, and the first one included
6159 a superfluous trailing colon, the final name in the first list and the
6160 first name in the second list were incorrectly joined into one item (with a
6161 colon in the middle).
6167 1. Added -C and -D options to the exinext utility, mainly to make it easier
6168 to include in the automated testing, but these could be helpful when
6169 multiple configurations are in use.
6171 2. The exinext utility was not formatting the output nicely when there was
6172 an alternate port involved in the retry record key, nor when there was a
6173 message id as well (for retries that were specific to a specific message
6174 and a specific host). It was also confused by IPv6 addresses, because of
6175 the additional colons they contain. I have fixed the IPv4 problem, and
6176 patched it up to do a reasonable job for IPv6.
6178 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6179 delivery, the log line now contains "pipelined" if PIPELINING was used.
6181 4. An SMTP transport process used to panic and die if the bind() call to set
6182 an explicit outgoing interface failed. This has been changed; it is now
6183 treated in the same way as a connect() failure.
6185 5. A reference to $sender_host_name in the part of a conditional expansion
6186 that was being skipped was still causing a DNS lookup. This no longer
6189 6. The def: expansion condition was not recognizing references to header lines
6190 that used bh_ and bheader_.
6192 7. Added the _cache feature to named lists.
6194 8. The code for checking quota_filecount in the appendfile transport was
6195 allowing one more file than it should have been.
6197 9. For compatibility with Sendmail, the command line option
6205 and sets the incoming protocol and host name (for trusted callers). The
6206 host name and its colon can be omitted when only the protocol is to be set.
6207 Note the Exim already has two private options, -pd and -ps, that refer to
6208 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6209 "s", but I don't think that's a major issue.
6211 10. A number of refactoring changes to the code, none of which should affect
6214 (a) The number of logging options was getting close to filling up the
6215 32-bit word that was used as a bit map. I have split them into two classes:
6216 those that are passed in the argument to log_write(), and those that are
6217 only ever tested independently outside of that function. These are now in
6218 separate 32-bit words, so there is plenty of room for expansion again.
6219 There is no change in the user interface or the logging behaviour.
6221 (b) When building, for example, log lines, the code previously used a
6222 macro that called string_cat() twice, in order to add two strings. This is
6223 not really sufficiently general. Furthermore, there was one instance where
6224 it was actually wrong because one of the argument was used twice, and in
6225 one call a function was used. (As it happened, calling the function twice
6226 did not affect the overall behaviour.) The macro has been replaced by a
6227 function that can join an arbitrary number of extra strings onto a growing
6230 (c) The code for expansion conditions now uses a table and a binary chop
6231 instead of a serial search (which was left over from when there were very
6232 few conditions). Also, it now recognizes conditions like "pam" even when
6233 the relevant support is not compiled in: a suitably worded error message is
6234 given if an attempt is made to use such a condition.
6236 11. Added ${time_interval:xxxxx}.
6238 12. A bug was causing one of the ddress fields not to be passed back correctly
6239 from remote delivery subprocesses. The field in question was not being
6240 subsequently used, so this caused to problems in practice.
6242 13. Added new log selectors queue_time and deliver_time.
6244 14. Might have fixed a bug in maildirsizefile handling that threw up
6245 "unexpected character" debug warnings, and recalculated the data
6246 unnecessarily. In any case, I expanded the warning message to give more
6249 15. Added the message "Restricted characters in address" to the statements in
6250 the default ACL that block characters like @ and % in local parts.
6252 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6253 Three changes have been made:
6255 (a) There was a serious bug; a negative response to MAIL caused the whole
6256 recipient domain to be cached as invalid, thereby blocking all messages
6257 to all local parts at the same domain, from all senders. This bug has
6258 been fixed. The domain is no longer cached after a negative response to
6259 MAIL if the sender used is not empty.
6261 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6264 (c) A new callout option, "use_sender" has been added for people who want
6265 the modified behaviour.
6271 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6274 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6275 indeed breaks things for older releases.
6277 3. Added additional logging to the case where there is a problem reading data
6278 from a filter that is running in a subprocess using a pipe, in order to
6279 try to track down a specific problem.
6281 4. Testing facility fudge: when running in the test harness and attempting
6282 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6283 getting "No route to host". Convert this to a timeout.
6285 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6288 6. Some OS don't have socklen_t but use size_t instead. This affects the
6289 fifth argument of getsockopt() amongst other things. This is now
6290 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6291 can be set for individual OS. I have set it for SunOS5, OSF1, and
6292 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6293 some earlier ones do not.
6295 7. Change 4.30/15 was not doing the test caselessly.
6297 8. The standard form for an IPv6 address literal was being rejected by address
6298 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6299 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6300 this, as well as the form without the "IPv6" on the front (but only when
6301 address literals are enabled, of course).
6303 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6305 10. Exim crashed if a message with an empty sender address specified by -f
6306 encountered a router with an errors_to setting. This could be provoked only
6307 by a command such as
6311 where an empty string was supplied; "<>" did not hit this bug.
6313 11. Installed PCRE release 4.5.
6315 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6316 remained set. It is now erased.
6318 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6319 times from message ids (which are base 36 rather than the normal 62).
6321 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6322 were being counted as actual protocol errors, and logged if the log
6323 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6324 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6325 and DATA following a set of rejected RCPTs do not count as protocol errors.
6326 In other words, Exim assumes they were pipelined, though this may not
6327 actually be the case. Of course, in all cases the client gets an
6328 appropriate error code.
6330 15. If a lookup fails in an ACL condition, a message about the failure may
6331 be available; it is used if testing the ACL cannot continue, because most
6332 such messages specify what the cause of the deferral is. However, some
6333 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6334 that caused an old message to be retained and used if a later statement
6335 caused a defer, replacing the real cause of the deferral.
6337 16. If an IP address had so many PTR records that the DNS lookup buffer
6338 was not large enough to hold them, Exim could crash while trying to process
6339 the truncated data. It now detects and logs this case.
6341 17. Further to 4.21/58, another change has been made: if (and only if) the
6342 first line of a message (the first header line) ends with CRLF, a bare LF
6343 in a subsequent header line has a space inserted after it, so as not to
6344 terminate the header.
6346 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6347 unnecessarily, used atoi() instead of strtol(), and didn't check the
6348 termination when getting file sizes from file names by regex.
6350 19. Completely re-implemented the support for maildirsize files, in the light
6351 of a number of problems with the previous contributed implementation
6352 (4.30/29). In particular:
6354 . If the quota is zero, the maildirsize file is maintained, but no quota is
6357 . If the maildir directory does not exist, it is created before any attempt
6358 to write a maildirsize file.
6360 . The quota value in the file is just a cache; if the quota is changed in
6361 the transport, the new value overrides.
6363 . A regular expression is available for excluding directories from the
6366 20. The autoreply transport checks the characters in options that define the
6367 message's headers; it allows continued headers, but it was checking with
6368 isspace() after an embedded newline instead of explicitly looking for a
6371 21. If all the "regular" hosts to which an address was routed had passed their
6372 expiry times, and had not reached their retry times, the address was
6373 bounced, even if fallback hosts were defined. Now Exim should go on to try
6376 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6377 equivalent code in the SMTP transport. Some hosts send humungous responses
6378 to HELO/EHLO, more than 1024 it seems.
6380 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6381 gives compiler warnings in some environments. I've now done it "properly",
6384 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6385 (because of problems with the built-in one) was declared to return uschar *
6386 instead of char *, causing compiler failure.
6388 25. Fixed a file descriptor leak when processing alias/forward files.
6390 26. Fixed a minor format string issue in dbfn.c.
6392 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6394 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6395 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6398 29. When a sender address is verified, it is cached, to save repeating the test
6399 when there is more than one recipient in a message. However, when the
6400 verification involves a callout, it is possible for different callout
6401 options to be set for different recipients. It is too complicated to keep
6402 track of this in the cache, so now Exim always runs a verification when a
6403 callout is required, relying on the callout cache for the optimization.
6404 The overhead is duplication of the address routing, but this should not be
6407 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6408 to be verified with callout=postmaster, and the main callout worked but the
6409 postmaster check failed, the verification correctly failed. However, if a
6410 subsequent RCPT command asked for sender verification *without* the
6411 postmaster check, incorrect caching caused this verification also to fail,
6414 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6415 it was not caching the DNS options (qualify_single, search_parents) that
6416 were used when the lookup failed. A subsequent lookup with different
6417 options therefore always gave the same answer, though there were cases
6418 where it should not have. (Example: a "domains = !$mx_any" option on a
6419 dnslookup router: the "domains" option is always processed without any
6420 widening, but the router might have qualify_single set.) Now Exim uses the
6421 cached value only when the same options are set.
6423 32. Added John Jetmore's "exipick" utility to the distribution.
6425 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6426 than a timeout (e.g. a certificate is required, and is not provided), an
6427 Exim server now closes the connection immediately. Previously it waited for
6428 the client to close - but if the client is SSL, it seems that they each
6429 wait for each other, leading to a delay before one of them times out.
6431 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6432 maintained 0.8.x compatibility because I don't think many are using it, and
6433 it is clearly obsolete.
6435 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6438 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6439 client certificate was expired. A simple patch fixes this, though I don't
6440 understand the full logic of why the verify callback is called multiple
6443 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6444 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6445 which causes problems with some clients (such as the Certicom SSL Plus
6446 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6447 disables the coutermeasure allowing Eudora to connect."
6449 38. Exim was not checking that a write() to a log file succeeded. This could
6450 lead to Bad Things if a log got too big, in particular if it hit a file
6451 size limit. Exim now panics and dies if it cannot write to a log file, just
6452 as it does if it cannot open a log file.
6454 39. Modified OS/Makefile-Linux so that it now contains
6456 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6458 The two -D definitions ensure that Exim is compiled with large file
6459 support, which makes it possible to handle log files that are bigger than
6462 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6463 instance) a domain was checked against a named list that involved a lookup,
6464 causing $domain_data to be set, then another domain was checked against the
6465 same list, then the first domain was re-checked, the value of $domain_data
6466 after the final check could be wrong. In particular, if the second check
6467 failed, it could be set empty. This bug probably also applied to
6470 41. The strip_trailing_dot option was not being applied to the address given
6471 with the -f command-line option.
6473 42. The code for reading a message's header from the spool was incrementing
6474 $received_count, but never initializing it. This meant that the value was
6475 incorrect (doubled) while delivering a message in the same process in which
6476 it was received. In the most common configuration of Exim, this never
6477 happens - a fresh exec is done - but it can happen when
6478 deliver_drop_privilege is set.
6480 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6481 it now includes up to 150 characters of the unexpected data in the log
6484 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6485 and building data strings. The size of both of these buffers was 10 000
6486 bytes - far larger than anybody would *ever* want, thought I. Needless to
6487 say, somebody hit the limit. I have increased the maximum line length to
6488 20 000 and the maximum data length of concatenated lines to 100 000. I have
6489 also fixed two bugs, because there was no checking on these buffers. Tsk,
6490 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6491 buffer is too small.
6493 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6494 lsearch lookups. Now it does.
6496 46. When parsing a route_list item in a manualroute router, a fixed-length
6497 buffer was used for the list of hosts. I made this 1024 bytes long,
6498 thinking that nobody would ever have a list of hosts that long. Wrong.
6499 Somebody had a whole pile of complicated expansion conditions, and the
6500 string was silently truncated, leading to an expansion error. It turns out
6501 that it is easier to change to an unlimited length (owing to other changes
6502 that have happened since this code was originally written) than to build
6503 structure for giving a limitation error. The length of the item that
6504 expands into the list of hosts is now unlimited.
6506 47. The lsearch lookup could not handle data where the length of text line was
6507 more than 4095 characters. Such lines were truncated, leading to shortened
6508 data being returned. It should now handle lines of any length.
6510 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6511 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6514 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6515 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6516 no longer happens in comment lines. A list of replacements is now placed
6517 at the head of all of the source files, except those whose only change is
6518 to replace PERL_COMMAND in the very first #! line.
6520 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6521 messages on the queue, with a bottom-up merge sort, using code contributed
6522 by Michael Haardt. This should make operations like -bp somewhat faster on
6523 large queues. It won't affect queue runners, except when queue_run_in_order
6526 51. Installed eximstats 1.31 in the distribution.
6528 52. Added support for SRV lookups to the dnslookup router.
6530 53. If an ACL referred to $message_body or $message_body_end, the value was not
6531 reset for any messages that followed in the same SMTP session.
6533 54. The store-handling optimization for building very long strings was not
6534 differentiating between the different store pools. I don't think this
6535 actually made any difference in practice, but I've tidied it.
6537 55. While running the routers to verify a sender address, $sender_address
6538 was still set to the sender address. This is wrong, because when routing to
6539 send a bounce to the sender, it would be empty. Therefore, I have changed
6540 it so that, while verifying a sender address, $sender_address is set to <>.
6541 (There is no change to what happens when verifying a recipient address.)
6543 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6544 target A or AAAA records (if not already returned) without resetting the
6545 qualify_single or search_parents options of the DNS resolver. These are
6546 inappropriate in this case because the targets of MX and SRV records must
6547 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6548 target that, when qualified, matched something in the local domain. These
6549 two options are now turned off when doing these lookups.
6551 57. It seems that at least some releases of Reiserfs (which does not have the
6552 concept of a fixed number of inodes) returns zero and not -1 for the
6553 number of available inodes. This interacted badly with check_spool_inodes,
6554 which assumed that -1 was the "no such thing" setting. What I have done is
6555 to check that the total number of inodes is greater than zero before doing
6556 the test of how many are available.
6558 58. When a "warn" ACL statement has a log_message modifier, the message is
6559 remembered, and not repeated. This is to avoid a lot of repetition when a
6560 message has many recipients that cause the same warning to be written.
6561 However, Exim was preserving the list of already written lines for an
6562 entire SMTP session, which doesn't seem right. The memory is now reset if a
6563 new message is started.
6565 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6566 debugging output unless log_rewrite was also set.
6568 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6569 of (int)(handle) when we know that handle contains (void *)(-1).
6571 61. The Exim daemon panic-logs an error return when it closes the incoming
6572 connection. However "connection reset by peer" seems to be common, and
6573 isn't really an error worthy of noting specially, so that particular error
6576 62. When Exim is trying to find all the local interfaces, it used to panic and
6577 die if the ioctl to get the interface flags failed. However, it seems that
6578 on at least one OS (Solaris 9) it is possible to have an interface that is
6579 included in the list of interfaces, but for which you get a failure error
6580 for this call. This happens when the interface is not "plumbed" into a
6581 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6582 failure of the "get flags" call assumes that the interface is down.
6584 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6585 makes life easier for people who are doing arithmetic on fields extracted
6586 from dates, where you often get leading zeros that should not be
6587 interpreted as octal.
6589 64. Added qualify_domain to the redirect router, to override the global
6592 65. If a pathologically long header line contained very many addresses (the
6593 report of this problem mentioned 10 000) and each of them was rewritten,
6594 Exim could use up a very large amount of memory. (It kept on making new
6595 copies of the header line as it rewrote, and never released the old ones.)
6596 At the expense of a bit more processing, the header rewriting function has
6597 been changed so that it no longer eats memory in this way.
6599 66. The generation of the Received: header has been moved from the time that a
6600 message starts to be received, to the time that it finishes. The timestamp
6601 in the Received: header should now be very close to that of the <= log
6602 line. There are two side-effects of this change:
6604 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6605 logged header lines no longer include the local Received: line, because
6606 it has not yet been created. The same applies to a copy of the message
6607 that is returned to a non-SMTP sender when a message is rejected.
6609 (b) When a filter file is tested using -bf, no additional Received: header
6610 is added to the test message. After some thought, I decided that this
6613 This change does not affect the value of $received_for. It is still set
6614 after address rewriting, but before local_scan() is called.
6616 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6618 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6619 gave an unhelpful panic error message, and a defer error. I have managed to
6620 change this behaviour so that it now rejects any supplied certificate,
6621 which seems right, as the list of acceptable certificates is empty.
6623 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6624 gave an unhelpful defer error. I have not managed to make this reject any
6625 supplied certificates, but the error message it gives is "no certificate
6626 supplied", which is not helpful.
6628 70. exigrep's output now also includes lines that are not associated with any
6629 message, but which match the given pattern. Implemented by a patch from
6630 Martin Sluka, which also tidied up the Perl a bit.
6632 71. Recipient callout verification, like sender verification, was using <> in
6633 the MAIL FROM command. This isn't really the right thing, since the actual
6634 sender may affect whether the remote host accepts the recipient or not. I
6635 have changed it to use the actual sender in the callout; this means that
6636 the cache record is now keyed on a recipient/sender pair, not just the
6637 recipient address. There doesn't seem to be a real danger of callout loops,
6638 since a callout by the remote host to check the sender would use <>.
6639 [SEE ABOVE: changed after hitting problems.]
6641 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6642 temporary errors. However, in the case of such a code being given after
6643 the end of a data transmission (i.e. after ".") Exim was failing to write
6644 a retry record for the message. (Yes, there was some broken host that was
6645 actually sending 8xx at this point.)
6647 73. An unknown lookup type in a host list could cause Exim to panic-die when
6648 the list was checked. (An example that provoked this was putting <; in the
6649 middle of a list instead of at the start.) If this happened during a DATA
6650 ACL check, a -D file could be left lying around. This kind of configuration
6651 error no longer causes Exim to die; instead it causes a defer error. The
6652 incident is still logged to the main and panic logs.
6654 74. Buglet left over from Exim 3 conversion. The message "too many messages
6655 in one connection" was written to the rejectlog but not the mainlog, except
6656 when address rewriting (yes!) was being logged.
6658 75. Added write_rejectlog option.
6660 76. When a system filter was run not as root (that is, when system_filter_user
6661 was set), the values of the $n variables were not being returned to the
6662 main process; thus, they were not subsequently available in the $sn
6665 77. Added +return_path_on_delivery log selector.
6667 78. A connection timeout was being treated differently from recipients deferred
6668 when testing hosts_max_try with a message that was older than the host's
6669 retry timeout. (The host should not be counted, thus allowing all hosts to
6670 be tried at least once before bouncing.) This may have been the cause of an
6671 occasionally reported bug whereby a message would remain on the queue
6672 longer than the retry timeout, but would be bounced if a delivery was
6673 forced. I say "may" because I never totally pinned down the problem;
6674 setting up timeout/retry tests is difficult. See also the next item.
6676 79. The ultimate address timeout was not being applied to errors that involved
6677 a combination of host plus message (for example, a timeout on a MAIL
6678 command). When an address resolved to a number of possible hosts, and they
6679 were not all tried for each delivery (e.g. because of hosts_max_try), a
6680 message could remain on the queue longer than the retry timeout.
6682 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6685 81. Fixed an obscure SMTP outgoing bug which required at least the following
6686 conditions: (a) there was another message waiting for the same server;
6687 (b) the server returned 5xx to all RCPT commands in the first message so
6688 that the message was not completed; (c) the server dropped the connection
6689 or gave a negative response to the RSET that Exim sends to abort the
6690 transaction. The observed case was a dropped connection after DATA that had
6691 been sent in pipelining mode. That is, the server had advertised PIPELINING
6692 but was not implementing it correctly. The effect of the bug was incorrect
6693 behaviour, such as trying another host, and this could lead to a crash.
6699 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6700 and daemon.c were passed as pointers to ints; they should have been
6701 pointers to socklen_t variables (which are typically unsigned ints).
6703 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6706 3. Fixed a really odd bug that affected only the testing scheme; patching a
6707 certain fixed string in the binary changed the value of another string that
6708 happened to be identical to the end of the original first string.
6710 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6711 name", it returns that address as the IP address. On some operating
6712 systems (e.g. Solaris), it also passes back the IP address string as the
6713 "host name". However, on others (e.g. Linux), it passes back an empty
6714 string. Exim wasn't checking for this, and was changing the host name to an
6715 empty string, assuming it had been canonicalized.
6717 5. Although rare, it is permitted to have more than one PTR record for a given
6718 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6719 all the names associated with an address, because they do in Solaris.
6720 However, it seems that they do not in Linux for data that comes from the
6721 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6722 I found this out when I moved to a new Linux workstation and tried to run
6723 the Exim test suite.
6725 To get round this problem I have changed the code so that it now does its
6726 own call to the DNS to look up PTR records when searching for a host name.
6727 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6728 addresses that are only in /etc/hosts are still found.
6730 This behaviour is, however, controlled by an option called host_lookup_
6731 order, which defaults to "bydns:byaddr". If people want to use the other
6732 order, or indeed, just use one or the other means of lookup, they can
6733 specify it in this variable.
6735 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6736 some operating systems, this comes back from gethostbyaddr() as an empty
6737 string, and this is what Exim used to test for. However, it seems that in
6738 other systems, "." is yielded. Exim now tests for this case too.
6740 7. The values of check_spool_space and check_log_space are now held internally
6741 as a number of kilobytes instead of an absolute number of bytes. If a
6742 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6743 kilobyte. This means that much larger values can be stored.
6745 8. Exim monitor: an attempt to get the action menu when not actually pointing
6746 at a message produces an empty menu entitled "No message selected". This
6747 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6748 no entries in it ("Shell widget menu has zero width and/or height"). So I
6749 have added a single, blank menu entry in this case.
6751 9. Added ${quote_local_part.
6753 10. MIME decoding is now applied to the contents of Subject: header lines when
6756 11. Now that a reference to $sender_host_address automatically causes a reverse
6757 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6758 host lookup before query-style lookups in lists that might use this
6759 variable. This has therefore been abolished, and the "net-" prefix is no
6760 longer necessary for query-style lookups.
6762 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6763 have been a typo for LFLAGS, so it has been changed.
6765 13. The install script calls Exim with "-C /dev/null" in order to find the
6766 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6767 to be output. However, since Exim outputs its version number before the
6768 error, it didn't break the script. It just looked ugly. I fixed this by
6769 always allowing "-C /dev/null" if the caller is root.
6771 14. Ignore overlarge ACL variable number when reading spool file - insurance
6772 against a later release with more variables having written the file.
6774 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6775 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6776 this, as well as the form without the "IPv6" on the front.
6778 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6779 OS/Makefile-Darwin file.
6781 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6782 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6784 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6785 variable. However, some OS use ints for inodes. I've added cast to long int
6786 to get rid of the compiler warning.
6788 19. I had forgotten to lock out "/../" in configuration file names when
6789 ALT_CONFIG_PREFIX was set.
6791 20. Routers used for verification do not need to specify transports. However,
6792 if such a router generated a host list, and callout was configured, Exim
6793 crashed, because it could not find a port number from the (non-existent)
6794 transport. It now assumes port 25 in this circumstance.
6796 21. Added the -t option to exigrep.
6798 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6799 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6800 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6801 them is set, LOOKUP_LSEARCH is forced.
6803 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6805 24. Added sender and host information to the "rejected by local_scan()" log
6806 line; previously there was no indication of these.
6808 25. Added .include_if_exists.
6810 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6811 Linux. It turns out that not all file systems support this. Apparently some
6812 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6813 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6814 not supported on the file descriptor, is now ignored when Exim is trying to
6815 sync a directory. This applies only to Linux.
6817 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6819 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6820 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6823 29. Added support for maildirsize files from supplied patch (modified a bit).
6825 30. The use of :fail: followed by an empty string could lead Exim to respond to
6826 sender verification failures with (e.g.):
6828 550 Verification failed for <xxx>
6829 550 Sender verify failed
6831 where the first response line was missing the '-' that indicates it is not
6832 the final line of the response.
6834 31. The loop for finding the name of the user that called Exim had a hardwired
6835 limit of 10; it now uses the value of finduser_retries, which is used for
6836 all other user lookups.
6838 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6841 33. Exim was neglecting to zero errno before one call of strtol() when
6842 expanding a string and expecting an integer value. On some systems this
6843 resulted in spurious "integer overflow" errors. Also, it was casting the
6844 result into an int without checking.
6846 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6847 did not work. The code looks as if it has *never* worked, though it appears
6848 to have been documented since at least release 1.62. I have made it work.
6850 35. The "timeout_DNS" error in retry rules, also documented since at least
6851 1.62, also never worked. As it isn't clear exactly what this means, and
6852 clearly it isn't a major issue, I have abolished the feature by treating it
6853 as "timeout", and writing a warning to the main and panic logs.
6855 36. The display of retry rules for -brt wasn't always showing the error code
6858 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6859 timeout_connect_A, timeout_connect_MX.
6861 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6862 to the empty sender.
6864 39. The daemon was not analysing the content of -oX till after it had closed
6865 stderr and disconnected from the controlling terminal. This meant that any
6866 syntax errors were only noted on the panic log, and the return code from
6867 the command was 0. By re-arranging the code a little, I've made the
6868 decoding happen first, so such errors now appear on stderr, and the return
6869 code is 1. However, the actual setting up of the sockets still happens in
6870 the disconnected process, so errors there are still only recorded on the
6873 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6874 connections (as happens on some IP stacks) was logged at start up time as
6875 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6876 it from "IPv6 and IPv4", which means that two separate sockets are being
6879 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6880 says whether AF_INET or AF_INET6 was passed as an argument.
6882 42. Exiwhat output was messed up when time zones were included in log
6885 43. Exiwhat now gives more information about the daemon's listening ports,
6886 and whether -tls-on-connect was used.
6888 44. The "port" option of the smtp transport is now expanded.
6890 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6891 silently ignored. Now an error message is written to the main and panic
6894 46. There's a new ACL modifier called "logwrite" which writes to a log file
6895 as soon as it is encountered.
6897 47. Added $local_user_uid and $local_user_gid at routing time.
6899 48. Exim crashed when trying to verify a sender address that was being
6902 49. Exim was recognizing only a space character after ".include". It now also
6903 recognizes a tab character.
6905 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6906 extracting the relevant information from the specification. The man page no
6907 longer contains scrambled data for the -d option, and I've added a section
6908 at the front about calling Exim under different names.
6910 51. Added "extra_headers" argument to the "mail" command in filter files.
6912 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6915 53. Installed eximstats 1.29.
6917 54. Added transport_filter_timeout as a generic transport option.
6919 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6920 Cc: header lines. This was required by RFC 822, but it not required by RFC
6923 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6924 incoming messages that did not have them. Now it does so only if the
6925 message originates locally, that is, if there is no associated remote host
6926 address. When Resent- header lines are present, this applies to the Resent-
6927 lines rather than the non-Resent- lines.
6929 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6930 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6932 58. Messages for configuration errors now include the name of the main
6933 configuration file - useful now that there may be more than one file in a
6934 list (.included file names were always shown).
6936 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6937 for those rare installations that do not start the daemon as root or run it
6938 setuid root. I've cut out the call to initgroups() if the daemon is not
6941 60. The Exim user and group can now be bound into the binary as text strings
6942 that are looked up at the start of Exim's processing.
6944 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6946 62. Added $mailstore_basename variable.
6948 63. Installed patch to sieve.c from Michael Haardt.
6950 64. When Exim failed to open the panic log after failing to open the main log,
6951 the original message it was trying to log was written to stderr and debug
6952 output, but if they were not available (the usual case in production), it
6953 was lost. Now it is written to syslog before the two lines that record the
6954 failures to open the logs.
6956 65. Users' Exim filters run in subprocesses under the user's uid. It is
6957 possible for a "deliver" command or an alias in a "personal" command to
6958 provoke an address rewrite. If logging of address rewriting is configured,
6959 this fails because the process is not running as root or exim. There may be
6960 a better way of dealing with this, but for the moment (because 4.30 needs
6961 to be released), I have disabled address rewrite logging when running a
6962 filter in a non-root, non-exim process.
6968 1. The buildconfig auxiliary program wasn't quoting the value set for
6969 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6970 not defined. This bug was masked in 4.22 by the effect that was fixed in
6973 2. Some messages that were rejected after a message id was allocated were
6974 shown as "incomplete" by exigrep. It no longer does this for messages that
6975 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6977 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6978 have allow_domain_literals set, the ID did not get logged in the <= line.
6979 Domain literals are now always recognized in Message-ID: header lines.
6981 4. The first argument for a ${extract expansion item is the key name or field
6982 number. Leading and trailing spaces in this item were not being ignored,
6983 causing some misleading effects.
6985 5. When deliver_drop_privilege was set, single queue runner processes started
6986 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6987 same command in the process it spins off) were not dropping privilege.
6989 6. When the daemon running as "exim" started a queue runner, it always
6990 re-executed Exim in the spun-off process. This is a waste of effort when
6991 deliver_drop_privilege is set. The new process now just calls the
6992 queue-runner function directly.
6998 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7001 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7002 ignored. Though the use of -oP was forcing the writing of a pid file, it
7003 was always written to the default place.
7005 3. If the message "no IP address found for host xxxx" is generated during
7006 incoming verification, it is now followed by identification of the incoming
7007 connection (so you can more easily find what provoked it).
7009 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7011 5. Added some features to "harden" Exim a bit more against certain attacks:
7013 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7014 be put in Local/Makefile. This is like the never_users runtime option,
7015 but it cannot be overridden. The default setting is "root".
7017 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7018 prefix string with which any file named in a -C command line option
7021 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7022 is retained for -C and -D only if the caller of Exim is root. Without
7023 it, the exim user may also use -C and -D and retain privilege.
7025 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7026 command line option is disabled.
7028 6. Macro names set by the -D option must start with an upper case letter, just
7029 like macro names defined in the configuration file.
7031 7. Added "dereference=" facility to LDAP.
7033 8. Two instances of the typo "uknown" in the source files are fixed.
7035 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7036 the Configure-Makefile script screwed up while processing it.
7038 10. Incorporated PCRE 4.4.
7040 11. The SMTP synchronization check was not operating right at the start of an
7041 SMTP session. For example, it could not catch a HELO sent before the client
7042 waited for the greeting. There is now a check for outstanding input at the
7043 point when the greeting is written. Because of the duplex, asynchronous
7044 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7045 way, but not yet received, when the check is performed.
7047 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7048 on TCP/IP sockets, because this apparently causes some broken clients to
7051 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7052 unchanged) from the Cygwin maintainer.
7054 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7055 was supported instead of testing for mbx. Effectively a typo.
7057 15. The spa authenticator server code was not checking that the input it
7058 received was valid base64.
7060 16. The debug output line for the "set" modifier in ACLs was not showing the
7061 name of the variable that was being set.
7063 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7065 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7066 lookup on its own. Something else was needed to trigger the lookup. For
7067 example, a match in host_lookup or the need for a host name in a host list.
7068 Now, if $sender_host_name is referenced and the host name has not yet been
7069 looked up, a lookup is performed. If the lookup fails, the variable remains
7070 empty, and $host_lookup_failed is set to "1".
7072 19. Added "eqi" as a case-independent comparison operator.
7074 20. The saslauthd authentication condition could segfault if neither service
7075 nor realm was specified.
7077 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7078 error message that was logged was misleading, and incoming SMTP
7079 connections were dropped. The message is now more accurate, and temporary
7080 errors are given to SMTP connections.
7082 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7083 (except RSET) with a 421 error, until QUIT is received. However, it was
7084 failing to send a response to QUIT.
7086 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7087 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7088 ACL is now run after the helo_try_verify_hosts code.
7090 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7091 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7092 case-independent, so other case variants are also recognized). Apparently
7093 some systems use these upper case variants.
7095 25. If more than two messages were waiting for the same host, and a transport
7096 filter was specified for the transport, Exim sent two messages over the
7097 same TCP/IP connection, and then failed with "socket operation on non-
7098 socket" when it tried to send the third.
7100 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7102 27. The extern definition of crypt16() in expand.c was not being excluded when
7103 the OS had its own crypt16() function.
7105 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7106 as a preferred synonym for return_size_limit, both as an option and as an
7109 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7111 30. Changed the default configuration ACL to relax the local part checking rule
7112 for addresses that are not in any local domains. For these addresses,
7113 slashes and pipe symbols are allowed within local parts, but the sequence
7114 /../ is explicitly forbidden.
7116 31. SPA server authentication was not clearing the challenge buffer before
7119 32. log_message in a "warn" ACL statement was writing to the reject log as
7120 well as to the main log, which contradicts the documentation and doesn't
7121 seem right (because no rejection is happening). So I have stopped it.
7123 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7124 However, I am unable to do any testing of this.
7126 34. Fixed an infelicity in the appendfile transport. When checking directories
7127 for a mailbox, to see if any needed to be created, it was accidentally
7128 using path names with one or more superfluous leading slashes; tracing
7129 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7131 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7132 contents are added to the log line that is written for every discarded
7133 recipient. (Previously a log_message setting was ignored.)
7135 36. The ${quote: operator now quotes the string if it is empty.
7137 37. The install script runs exim in order to find its version number. If for
7138 some reason other than non-existence or emptiness, which it checks, it
7139 could not run './exim', it was installing it with an empty version number,
7140 i.e. as "exim-". This error state is now caught, and the installation is
7143 38. An argument was missing from the function that creates an error message
7144 when Exim fails to connect to the socket for saslauthd authentication.
7145 This could cause Exim to crash, or give a corrupted message.
7147 39. Added isip, isip4, and isip6 to ${if conditions.
7149 40. The ACL variables $acl_xx are now saved with the message, and can be
7150 accessed later in routers, transports, and filters.
7152 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7153 strings in the file are not string-expanded.
7155 42. If a MAIL command specified a SIZE value that was too large to fit into an
7156 int variable, the check against message_size_limit failed. Such values are
7157 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7158 day this will have to be increased, but I don't think I want to be around
7159 when emails are that large.
7166 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7167 iconv() is not standard in FreeBSD.
7169 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7170 IPv6 enabled. The observed symptom was a segmentation fault on return from
7171 the function os_common_find_running_interfaces() in src/os.c.
7173 3. In the check_special_case() function in daemon.c I had used "errno" as an
7174 argument name, which causes warnings on some systems. This was basically a
7175 typo, since it was named "eno" in the comments!
7177 4. The code that waits for the clock to tick (at a resolution of some fraction
7178 of a second) so as to ensure message-id uniqueness was always waiting for
7179 at least one whole tick, when it could have waited for less. [This is
7180 almost certainly not relevant at current processor speeds, where it is
7181 unlikely to ever wait at all. But we try to future-proof.]
7183 5. The function that sleeps for a time interval that includes fractions of a
7184 second contained a race. It did not block SIGALRM between setting the
7185 timer, and suspending (a couple of lines later). If the interval was short
7186 and the sigsuspend() was delayed until after it had expired, the suspension
7187 never ended. On busy systems this could lead to processes getting stuck for
7190 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7191 process, before it forks any delivery processes. The open lookup caching
7192 mechanism meant that the open file or database connection was passed into
7193 the delivery process. The problem was that delivery processes always tidy
7194 up cached lookup data. This could cause a problem for the next delivery
7195 process started by the queue runner, because the external queue runner
7196 process does not know about the closure. So the next delivery process
7197 still has data in the lookup cache. In the case of a file lookup, there was
7198 no problem because closing a file descriptor in a subprocess doesn't affect
7199 the parent. However, if the lookup was caching a connection to a database,
7200 the connection was closed, and the second delivery process was likely to
7201 see errors such as "PGSQL: query failed: server closed the connection
7202 unexpectedly". The problem has been fixed by closing all cached lookups
7203 in a queue runner before running a delivery process.
7205 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7206 seem to have the "const" qualifier which it has on other OS. I've
7209 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7210 *of the same type* (client or server) with the same public name that an
7211 error should be diagnosed.
7213 9. When Exim looked up a host name for an IP address, but failed to find the
7214 original IP address when looking up the host name (a safety check), it
7215 output the message "<ip address> does not match any IP for NULL", which was
7216 confusing, to say the least. The bug was that the host name should have
7217 appeared instead of "NULL".
7219 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7220 user that is built into the binary, and the -C or -D options is used, root
7221 privilege is dropped before the configuration file is read. In addition,
7222 logging is switched to stderr instead of the normal log files. If the
7223 configuration then re-defines the Exim user, the unprivileged environment
7224 is probably not what is expected, so Exim logs a panic warning message (but
7227 However, if deliver_drop_privilege is set, the unprivileged state may well
7228 be exactly what is intended, so the warning has been cut out in that case,
7229 and Exim is allowed to try to write to its normal log files.
7235 1. smtp_return_error_details was not giving details for temporary sender
7236 or receiver verification errors.
7238 2. Diagnose a configuration error if two authenticators have the same public
7241 3. Exim used not to create the message log file for a message until the first
7242 delivery attempt. This could be confusing when incoming messages were held
7243 for policy or load reasons. The message log file is now created at the time
7244 the message is received, and an initial "Received" line is written to it.
7246 4. The automatically generated man page for command line options had a minor
7247 bug that caused no ill effects; however, a more serious problem was that
7248 the procedure for building the man page automatically didn't always
7249 operate. Consequently, release 4.20 contains an out-of-date version. This
7250 shouldn't happen again.
7252 5. When building Exim with embedded Perl support, the script that builds the
7253 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7254 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7256 6. The freeze_tell option was not being used for messages that were frozen on
7257 arrival, either by an ACL or by local_scan().
7259 7. Added the smtp_incomplete_transaction log selector.
7261 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7262 was accepting AUTH without a new EHLO.
7264 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7265 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7268 10. Logging of TCP/IP connections (when configured) now happens in the main
7269 daemon process instead of the child process, so that the TCP/IP connection
7270 count is more accurate (but it can never be perfect).
7272 11. The use of "drop" in a nested ACL was not being handled correctly in the
7273 outer ACL. Now, if condition failure induced by the nested "drop" causes
7274 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7275 or "require"), the connection is dropped.
7277 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7278 that yield "discard" can now be used with an "accept" or a "discard" verb,
7279 but an error is generated for any others (because I can't see a useful way
7280 to define what should happen).
7282 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7283 are now processed in the same way as lines in the Exim configuration file.
7284 In particular, continuation lines are supported.
7286 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7288 15. Added -ti meaning -t -i.
7290 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7291 domains, and warn by logging if others are found.
7293 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7294 returned from GIFCONF when Exim is trying to find the list of interfaces on
7295 a host. The code in os.c has been modified to copy each ifreq to an aligned
7296 structure in all cases.
7298 Also, in some cases, the returned ifreq's were being copied to a 'struct
7299 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7300 means the last couple of bytes of an IPv6 address could be chopped if the
7301 ifreq contained only a normal sockaddr (14 bytes storage).
7303 18. Named domain lists were not supported in the hosts_treat_as_local option.
7304 An entry such as +xxxx was not recognized, and was treated as a literal
7307 19. Ensure that header lines added by a DATA ACL are included in the reject log
7308 if the ACL subsequently rejects the message.
7310 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7311 MD5 (which is deprecated).
7313 21. When testing a filter file using -bf, Exim was writing a message when it
7314 took the sender from a "From " line in the message, but it was not doing so
7315 when it took $return_path from a Return-Path: header line. It now does.
7317 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7318 with a valid header line field name (a series of printing characters
7319 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7321 23. Changed "disc" in the source to "disk" to conform to the documentation and
7322 the book and for uniformity.
7324 24. Ignore Sendmail's -Ooption=value command line item.
7326 25. When execve() failed while trying to run a command in a pipe transport,
7327 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7328 could be confused with a return value of 69 from the command itself. This
7329 has been changed to 127, the value the shell returns if it is asked to run
7330 a non-existent command. The wording for the related log line suggests a
7331 non-existent command as the problem.
7333 26. If received_header_text expands to an empty string, do not add a Received:
7334 header line to the message. (Well, it adds a token one on the spool, but
7335 marks it "old" so that it doesn't get used or transmitted.)
7337 27. Installed eximstats 1.28 (addition of -nt option).
7339 28. There was no check for failure on the call to getsockname() in the daemon
7340 code. This can fail if there is a shortage of resources on the system, with
7341 ENOMEM, for example. A temporary error is now given on failure.
7343 29. Contrary to the C standard, it seems that in some environments, the
7344 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7345 program. Exim now does this explicitly; it affects the formatting of
7346 timestamps using strftime().
7348 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7349 complaints. I've now initialized all the variables, to avoid this.
7351 32. Header lines added by a system filter were not being "seen" during
7352 transport-time rewrites.
7354 33. The info_callback() function passed to OpenSSL is set up with type void
7355 (*)(SSL *, int, int), as described somewhere. However, when calling the
7356 function (actually a macro) that sets it up, the type void(*)() is
7357 expected. I've put in a cast to prevent warnings from picky compilers.
7359 34. If a DNS black list lookup found a CNAME record, but there were no A
7360 records associated with the domain it pointed at, Exim crashed.
7362 35. If a DNS black list lookup returned more than one A record, Exim ignored
7363 all but the first. It now scans all returned addresses if a particular IP
7364 value is being sought. In this situation, the contents of the
7365 $dnslist_value variable are a list of all the addresses, separated by a
7368 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7369 to accept a host name and all its aliases if the forward lookup for any of
7370 them yielded the IP address of the incoming connection. Now it accepts only
7371 those names whose forward lookup yields the correct IP address. Any other
7372 names are discarded. This closes a loophole whereby a rogue DNS
7373 administrator could create reverse DNS records to break through a
7374 wildcarded host restriction in an ACL.
7376 37. If a user filter or a system filter that ran in a subprocess used any of
7377 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7378 the wrong values were passed to the pipe command ($thisaddress had the
7379 value of $0, $0 had the value of $1, etc). This bug was introduced by
7380 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7382 38. Improved the line breaking for long SMTP error messages from ACLs.
7383 Previously, if there was no break point between 40 and 75 characters, Exim
7384 left the rest of the message alone. Two changes have been made: (a) I've
7385 reduced the minimum length to 35 characters; (b) if it can't find a break
7386 point between 35 and 75 characters, it looks ahead and uses the first one
7387 that it finds. This may give the occasional overlong line, but at least the
7388 remaining text gets split now.
7390 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7391 file descriptors might be low, and that setting 1000 would always raise it.
7392 It turns out that in some environments, the limit is already over 1000 and
7393 that lowering it causes trouble. So now Exim takes care not to decrease it.
7395 40. When delivering a message, the value of $return_path is set to $sender_
7396 address at the start of routing (routers may change the value). By an
7397 oversight, this default was not being set up when an address was tested by
7398 -bt or -bv, which affected the outcome if any router or filter referred to
7401 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7402 log only when "message" or "log_message" are set. However, if one of the
7403 conditions was an address verification, or a call to a nested ACL, the
7404 messages generated by the underlying test were being passed through. This
7405 no longer happens. The underlying message is available in $acl_verify_
7406 message for both "message" and "log_message" expansions, so it can be
7407 passed through if needed.
7409 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7410 new expansion $bh_ to give the encoded byte string without charset
7411 translation. Translation happens only if iconv() is available; HAVE_ICONV
7412 indicates this at build time. HEADERS_CHARSET gives the charset to
7413 translate to; headers_charset can change it in the configuration, and
7414 "headers charset" can change it in an individual filter file.
7416 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7417 that creates RFC 2047 encoded "words" labels them as that charset instead
7418 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7419 expansion operator; (ii) when Exim creates a From: line for a local
7420 message; (iii) when a header line is rewritten to include a "phrase" part.
7422 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7423 buggy, causing it to skip the first lines of messages whose message ID
7424 ended in 'D'. This would not have bitten before Exim release 4.14, because
7425 message IDs were unlikely to end in 'D' before then. The effect was to have
7426 incorrect size information for certain domains.
7428 45. #include "config.h" was missing at the start of the crypt16.c module. This
7429 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7432 46. If there was a timeout during a "random" callout check, Exim treated it as
7433 a failure of the random address, and carried on sending RSET and the real
7434 address. If the delay was just some slowness somewhere, the response to the
7435 original RCPT would be taken as a response to RSET and so on, causing
7436 mayhem of various kinds.
7438 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7439 when I implemented it. It didn't allow for the fact that some option values
7440 may legitimately be negative (e.g. size_addition), and it didn't even do
7441 the right test for positive values.
7443 48. Domain names in DNS records are case-independent. Exim always looks them up
7444 in lower case. Some resolvers return domain names in exactly the case they
7445 appear in the zone file, that is, they may contain uppercase letters. Not
7446 all resolvers do this - some return always lower case. Exim was treating a
7447 change of case by a resolver as a change of domain, similar to a widening
7448 of a domain abbreviation. This triggered its re-routing code and so it was
7449 trying to route what was effectively the same domain again. This normally
7450 caused routing to fail (because the router wouldn't handle the domain
7451 twice). Now Exim checks for this case specially, and just changes the
7452 casing of the domain that it ultimately uses when it transmits the message
7455 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7458 50. If a filter generated a file delivery with a non-absolute name (possible if
7459 no home directory exists for the router), the forbid_file option was not
7462 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7463 the existing equality matching.
7465 52. Exim was using ints instead of ino_t variables in some places where it was
7466 dealing with inode numbers.
7468 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7469 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7470 called TMPDIR, and if it finds it is different, it changes its value.
7472 54. The smtp_printf() function is now made available to local_scan() so
7473 additional output lines can be written before returning. There is also an
7474 smtp_fflush() function to enable the detection of a dropped connection.
7475 The variables smtp_input and smtp_batched_input are exported to
7478 55. Changed the default runtime configuration: the message "Unknown user"
7479 has been removed from the ACL, and instead placed on the localuser router,
7480 using the cannot_route_message feature. This means that any verification
7481 failures that generate their own messages won't get overridden. Similarly,
7482 the "Unrouteable address" message that was in the ACL for unverifiable
7483 relay addresses has also been removed.
7485 56. Added hosts_avoid_esmtp to the smtp transport.
7487 57. The exicyclog script was not checking for the esoteric option
7488 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7489 will work only if exicyclog is run under the appropriate euid.
7491 58. Following a discussion on the list, the rules by which Exim recognises line
7492 endings on incoming messages have been changed. The -dropcr and drop_cr
7493 options are now no-ops, retained only for backwards compatibility. The
7494 following line terminators are recognized: LF CRLF CR. However, special
7495 processing applies to CR:
7497 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7498 nor a local message in the state where . is a terminator.
7500 (ii) If a bare CR is encountered in a header line, an extra space is added
7501 after the line terminator so as not to end the header. The reasoning
7502 behind this is that bare CRs in header lines are most likely either
7503 to be mistakes, or people trying to play silly games.
7505 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7506 was being incorrectly given as 18 bytes larger than it should have been.
7507 This is a VOB (very old bug).
7509 60. This may never have affected anything current, but just in case it has:
7510 When the local host is found other than at the start of a list of hosts,
7511 the local host, those with the same MX, and any that follow, are discarded.
7512 When the list in question was part of a longer list of hosts, the following
7513 hosts (not currently being processed) were also being discarded. This no
7514 longer happens. I'm not sure if this situation could ever has previously
7517 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7520 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7521 header. This is something that is recommended in a new Internet Draft, and
7522 is something that is documented as being done by Sendmail. There are two
7523 possible values. For messages generated by the autoreply transport, Exim
7526 Auto-Submitted: auto-replied
7528 whereas for all other generated messages (e.g. bounces) it adds
7530 Auto-Submitted: auto-generated
7532 63. The "personal" condition in filters now includes a test for the
7533 Auto-Submitted: header. If it contains the string "auto-" the message it
7534 not considered personal.
7536 64. Added rcpt_include_affixes as a generic transport option.
7538 65. Added queue_only_override (default true).
7540 66. Added the syslog_duplication option.
7542 67. If what should have been the first header line of a message consisted of
7543 a space followed by a colon, Exim was mis-interpreting it as a header line.
7544 It isn't of course - it is syntactically invalid and should therefore be
7545 treated as the start of the message body. The misbehaviour could have
7546 caused a number of strange effects, including loss of data in subsequent
7547 header lines, and spool format errors.
7549 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7550 client host had authenticated. This control can now be exercised by an ACL
7551 for more flexibility.
7553 69. By default, callouts do not happen when testing with -bh. There is now a
7554 variant, -bhc, which does actually run the callout code, including
7555 consulting and updating the callout cache.
7557 70. Added support for saslauthd authentication, courtesy of Alexander
7560 71. If statvfs() failed on the spool or log directories while checking their
7561 size for availability, Exim confusingly gave the error "space shortage".
7562 Furthermore, in debugging mode it crashed with a floating point exception.
7563 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7564 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7565 serious problem, Exim now writes to the main and panic logs when this
7566 happens, with details of the failure. It then refuses to accept the
7567 incoming message, giving the message "spool directory problem" or "log
7568 directory problem" with a 421 code for SMTP messages.
7570 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7571 0, 1, and 2 exist, because some OS complain for execs without them (see
7572 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7573 descriptors. However, the code omitted to check that the open succeeded,
7574 causing mysterious errors if for some reason the permissions on /dev/null
7575 got screwed. Now Exim writes a message to the main and panic logs, and
7576 bombs out if it can't open /dev/null.
7578 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7579 interact so that it is all more flexible. It is supposed to remain
7580 backwards compatible. Also added extra_local_interfaces.
7582 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7583 to bomb out with an assertion failure - to the client this appears as a
7584 connection drop. This problem occurs in the part of the code that was taken
7585 from the Samba project. Fortunately, the assertion is in a very simple
7586 function, so I have fixed this by reproducing the function inline in the
7587 one place where it is called, and arranging for authentication to fail
7588 instead of killing the process with assert().
7590 75. The SPA client code was not working when the server requested OEM rather
7591 than Unicode encoding.
7593 76. Added code to make require_files with a specific uid setting more usable in
7594 the case where statting the file as root fails - usually a non-root-mounted
7595 NFS file system. When this happens and the failure is EACCES, Exim now
7596 forks a subprocess and does the per-uid checking as the relevant uid.
7598 77. Added process_log_path.
7600 78. If log_file_path was not explicitly set, a setting of check_log_space or
7601 check_log_inodes was ignored.
7603 79. If a space check for the spool or log partitions fails, the incident is now
7604 logged. Of course, in the latter case the data may get lost...
7606 80. Added the %p formatting code to string_format() so that it can be used to
7607 print addresses in debug_print(). Adjusted all the address printing in the
7608 debugging in store.c to use %p rather than %d.
7610 81. There was a concern that a line of code in smtp_in.c could overflow a
7611 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7612 initially expressed, the concern was not well-founded, because trailing
7613 spaces are removed early. However, if the trailing spaces were followed by
7614 a NULL, they did not get removed, so the overflow was possible. Two fixes
7617 (a) I re-wrote the offending code in a cleaner fashion.
7618 (b) If an incoming SMTP command contains a NULL character, it is rejected
7621 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7622 runs initgroups(), so that if the Exim user is in any additional groups,
7623 they will be used during message reception.
7629 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob