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.
6 Since Exim version 4.94
7 -----------------------
9 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
10 as arguments, so an implementation trying to copy these into a local
11 buffer was taking a taint-enforcement trap. Fix by using dynamically
12 created buffers. Similar fix for radius expansion condition.
14 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
15 reasonable, eg. to count headers. Fix by using dynamically created
16 buffers rather than a local. Do similar fixes for ACL actions "dcc",
17 "log_reject_target", "malware" and "spam"; the arguments are expanded
18 so could be handling tainted values.
20 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
21 broken the (no-op) support for this sendmail command. Restore it
22 to doing nothing, silently, and returning good status.
24 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
25 record path was given (or the default used) without a leading directory
26 path, an error occurred on trying to open it. Use the transport's working
29 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
30 transport. Previously it was the name on the DNS A-record; use instead
31 the head of the CNAME chain leading there (if there is one). This seems
32 to align better with RFC 6125.
34 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
35 smtp_accept_max_per_host allocated resources which were not released
36 when the limit was exceeded. This eventually crashed the daemon. Fix
37 by adding a relase action in that path.
39 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
40 expanded; previously using tainted values was rejected. Fix by using
41 dynamically-created buffers.
43 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
44 Previously a macro used one argument twice; when called with the
45 argument as an expression having side-effects, incorrect operation
46 resulted. Use an inlineable function.
48 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
49 held open for a verify callout. Previously this wan not accounted for
50 and a corrupt onward SMTP conversation resulted.
52 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
53 excluded, not matching the documentation.
55 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
56 was given for the sqlite_dbfile a trap resulted.
58 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
59 "name" argument resulted in a trap. There is no reason to disallow such;
60 this was a coding error.
62 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
63 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
64 spent suspended, ignoring the Posix definition. Previously we assumed
65 it did and a constant offset from real time could be used as a correction.
66 Change to using the same clock source for the start-of-message and the
67 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
68 exists, just to get a clock slightly more aligned to reality.
70 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
71 RFC says it is optional some validators care. The missing char was not
72 intended but triggered by a line-wrap alignement. Discovery and fix by
73 Guillaume Outters, hacked on by JH.
75 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
76 name being quoted was tainted a trap would be taken. Fix by using
77 dynamicaly created buffers. The routine could have been called by a
78 rewrite with the "h" flag, by using the "-F" command-line option, or
79 by using a "name=" option on a control=submission ACL modifier.
81 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
82 Previously when a whitespace character was specified it was not inserted
83 after removing the newline.
85 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
86 is_tainted() had an off-by-one error in the overenthusiastic direction.
87 Find and fix by Gavan. Although NetBSD is not a supported platform for
88 4.94 this bug could affect other platforms.
94 JH/01 Avoid costly startup code when not strictly needed. This reduces time
95 for some exim process initialisations. It does mean that the logging
96 of TLS configuration problems is only done for the daemon startup.
98 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
100 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
101 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
104 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
105 DKIM signing is being done. Previously a transport_filter would always
106 disable CHUNKING, falling back to traditional DATA.
108 JH/05 Regard command-line receipients as tainted.
110 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
112 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
113 PAM library frees one of the arguments given to it, despite the
114 documentation. Therefore a plain malloc must be used.
116 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
117 on-stack buffers were used, resulting in a taint trap when DSN information
118 copied from a received message was written into the buffer.
120 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
121 the ordering of its ARC headers. This caused a crash.
123 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
124 a new record was being constructed with information from the peer, a trap
127 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
128 installation would get error messages from DMARC verify, when it hit the
129 nonexistent file indicated by the default. Distros wanting DMARC enabled
130 should both provide the file and set the option.
131 Also enforce no DMARC verification for command-line sourced messages.
133 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
134 could, depending on the platform, hang at the STARTTLS response.
136 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
137 message on a connection. Previously if one message had ARC headers and
138 the following one did not, a crash could result when adding an
139 Authentication-Results: header.
141 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
142 Exim main code and Exim-related utities. The introduction of taint
143 tracking also did many adjustments to string handling. Since then, eximon
144 frequently terminated with an assert failure.
146 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
147 check for 452 responses. This slightly helps the inefficieny of doing
148 a large alias-expansion into a recipient-limited target. The max_rcpt
149 transport option still applies (and at the current default, will override
150 the new feature). The check is done for either cause of synch, and forces
151 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
152 connection. The new facility is not tunable at this time.
154 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
155 library live data was being used, so the results became garbage. Make
156 copies while it is still usable.
158 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
159 on delivery deferred (==) and failed (**) lines (if a delivery was
160 attemtped). Previously it was only on completion (=>) lines.
162 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
163 for the expansion of the server_scram_iter and server_scram_salt options.
165 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
166 are now specifically given a NO_DATA response without hitting the system
167 resolver. The library goes on to do the now-standard TXT lookup.
168 Use of dnsdb lookups is not affected.
170 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
171 only retrieve the errormessage once. Previously two calls to dlerror()
172 were used, and the second one (for mainlog/paniclog) retrieved null
175 JH/20 Taint checking: disallow use of tainted data for
176 - the appendfile transport file and directory options
177 - the pipe transport command
178 - the autoreply transport file, log and once options
179 - file names used by the redirect router (including filter files)
181 - paths used by single-key lookups
182 Previously this was permitted.
184 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
185 adjusted the size of a major service buffer; this failed because the
186 buffer was in use at the time. Change to a compile-time increase in the
187 buffer size, when this authenticator is compiled into exim.
189 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
190 previous fast-mode was untenable in the face of glibs using mmap to
191 support larger malloc requests.
193 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
194 New values supported, if defined on system where compiled:
195 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
196 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
198 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
199 running a limited number of proceses in parallel, a benefit is gained. The
200 amount varies with the platform hardware and load. The use of the option
201 queue_run_in_order means we cannot do this, as ordering becomes
204 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
205 had introduced a string-copy (for ensuring NUL-termination) which was not
206 appropriate for that case, which can include embedded NUL bytes in the
207 block of data. Investigation showed the copy to actually be needless, the
208 data being length-specified.
210 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
211 done during a receiving connection, and both used TLS, global info was
212 used rather than per-connection info for tracking the state of data
213 queued for transmission. This could result in a connection hang.
215 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
216 Previously, when delivering serveral messages down a single connection
217 only the first would provide a SIZE. This was due to the size information
218 not being properly tracked.
220 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
221 TAI (at 37 seconds currently), pretend to be in UTC for time-related
222 expansion and logging. Previously, spurious values such as a future
223 minute could be seen.
225 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
226 it could crash from a null-deref. This could also affect the
227 ${addresses: } operator and ${readsock } item.
229 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
230 message following a mime one, the variable was not reset.
232 JH/30 When an pipelined-connect fails at the first response, assume incorrect
233 cached capability (perhaps the peer reneged?) and immediately retry in
236 JH/31 Fix spurious detection of timeout while writing to transport filter.
238 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
239 an attempt to copy the string was made before checking it.
241 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
242 taint of the lookup key was maintained; we now regard the presence in the
243 filesystem as sufficient validation.
245 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
246 argument is supplied.
248 JH/35 The dsearch lookup now requires that the directory is an absolute path.
249 Previously this was not checked, and nonempty relative paths made an
250 access under Exim's current working directory.
252 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
253 Previously no event was raised.
255 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
256 parameter supplied by the sender MAIL FROM command. Previously it was
257 ignored, and only the check_spool_space option value for the required
260 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
261 the size of the signing public-key. Previously it was instead giving
262 the size of the signature hash.
264 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
265 the default. See the (new) dkim_verify_min_keysizes option.
267 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
268 and an ACL use a lookup for checking either the local_part or domain,
269 stale data could be accessed. Ensure that variable references are
270 dropped between messages.
272 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
273 by the client was not checked as pointing within response data before
274 being used. A malicious client could thus cause an out-of-bounds read and
275 possibly gain authentication. Fix by adding the check.
277 JH/42 Internationalisation: change the default for downconversion in the smtp
278 transport to be "if needed". Previously it was "as previously set" for
279 the message, which usually meant "if needed" for message-submission but
280 "no" for everything else. However, MTAs have been seen using SMTPUTF8
281 even when the envelope addresses did not need it, resulting in forwarding
282 failures to non-supporting MTAs. A downconvert in such cases will be
283 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
284 transport. The change does mean that addresses needing conversion will
285 be converted when previously a delivery failure would occur.
287 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
288 response was received it would be used unchecked in a fail-DSN, violating
289 standards on line-length limits. Truncate if needed.
291 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
292 doesn't work. (Additionally add a new main config option to configure the
299 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
300 side, to decode a TLS 1.3 packet capture.
302 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
303 Previously the default library behaviour applied, sending two, each in
306 JH/03 Debug output for ACL now gives the config file name and line number for
309 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
311 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
313 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
314 buffer overrun for (non-chunking) other transports.
316 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
317 TLS1.3, means that a server rejecting a client certificate is not visible
318 to the client until the first read of encrypted data (typically the
319 response to EHLO). Add detection for that case and treat it as a failed
320 TLS connection attempt, so that the normal retry-in-clear can work (if
321 suitably configured).
323 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
324 and/or domain. Found and fixed by Jason Betts.
326 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
327 configuration). If a CNAME target was not a wellformed name pattern, a
330 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
331 the OS reports them interleaved with other addresses.
333 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
334 used both for input and for a verify callout, both encrypted, SMTP
335 responses being sent by the server could be lost. This resulted in
336 dropped connections and sometimes bounces generated by a peer sending
339 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
340 string. Previously it was possible to cause undefined behaviour in a
341 library routine (usually a crash). Found by "zerons".
343 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
346 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
347 API was removed, so update to use the newer ones.
349 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
350 any timeout set, is taking a long time. Previously we would hang on to a
351 rotated logfile "forever" if the input was arriving with long gaps
352 (a previous attempt to fix addressed lack, for a long time, of initial
355 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
356 shared (NFS) environment. The length of the tempfile name is now
357 4 + 16 ("hdr.$message_exim_id") which might break on file
358 systems which restrict the file name length to lower values.
361 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
362 shared (NFS) environment.
364 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
365 did for all versions <4.90). Notably -M, -m, --invert, -I may be
368 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
369 on some platforms for bit 31.
371 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
372 to changes apparently associated with TLS1.3 handling some of the APIs
373 previously used were either nonfunctional or inappropriate. Strings
374 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
375 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
376 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
377 This affects log line X= elements, the $tls_{in,out}_cipher variables,
378 and the use of specific cipher names in the encrypted= ACL condition.
380 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
382 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
383 verification result was not updated unless hosts_require_ocsp applied.
385 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
386 queue_list_requires_admin set to false, non-admin users were denied the
389 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
390 directory-of-certs mode. Previously they were advertised despite the
393 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
394 A single TCP connection by a client will now hold a TLS connection open
395 for multiple message deliveries, by default. Previously the default was to
398 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
399 default. If built with the facility, DANE will be used. The facility
400 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
402 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
403 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
404 must be defined and you must still, unless you define DISABLE_TLS, manage
405 the the include-dir and library-file requirements that go with that
406 choice. Non-TLS builds are still supported.
408 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
411 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
412 default. If the platform supports and has the facility enabled, it will
413 be requested on all coneections.
415 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
416 controlled by the build-time option SUPPORT_PIPE_CONNECT.
418 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
420 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
421 success-DSN messages. Previously the From: header was always the default
422 one for these; the option was ignored.
424 JH/28 Fix the timeout on smtp response to apply to the whole response.
425 Previously it was reset for every read, so a teergrubing peer sending
426 single bytes within the time limit could extend the connection for a
427 long time. Credit to Qualsys Security Advisory Team for the discovery.
429 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
430 delivery address, which leaked information of the results of local
431 forwarding. Change to the original envelope recipient address, per
434 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
435 requested. Previously not bounce was generated and a log entry of
436 error ignored was made.
438 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
440 JH/32 Introduce a general tainting mechanism for values read from the input
441 channel, and values derived from them. Refuse to expand any tainted
442 values, to catch one form of exploit.
444 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
445 was unused and the unexpanded text used for the test. Found and
446 fixed by Ruben Jenster.
448 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
449 an attempt to use a TLS library read routine dereffed a nul pointer,
452 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
453 them in our smtp response.
455 JH/36 Have the general router option retry_use_local_part default to true when
456 any of the restrictive preconditions are set (to anything). Previously it
457 was only for check_local user. The change removes one item of manual
458 configuration which is required for proper retries when a remote router
459 handles a subset of addresses for a domain.
461 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
462 link count into consideration.
464 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
465 caused the extension of big_buffer, the following lines were ignored.
467 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
468 accordance with RFC 2308. Previously there was no expiry, so a longlived
469 receive process (eg. due to ACL delays) versus a short SOA value could
472 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
474 JH/39 Promote DMARC support to mainline.
476 JH/40 Bug 2452: Add a References: header to DSNs.
478 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
479 parameters. The relevant library call is documented as "Deprecated: This
480 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
481 3.6.0, DH parameters are negotiated following RFC7919."
483 HS/06 Change the default of dnssec_request_domains to "*"
485 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
486 carried on and emitted a BDAT command, even when PIPELINING was not
489 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
490 buffer was used for the filename, resulting in a trap when tainted
491 arguments (eg. $domain) were used.
493 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
494 recommended to avoid a possible server-load attack. The feature can be
495 re-enabled via the openssl_options main cofiguration option.
497 JH/45 local_scan API: documented the current smtp_printf() call. This changed
498 for version 4.90 - adding a "more data" boolean to the arguments.
499 Bumped the ABI version number also, this having been missed previously;
500 release versions 4.90 to 4.92.3 inclusive were effectively broken in
501 respect of usage of smtp_printf() by either local_scan code or libraries
502 accessed via the ${dlfunc } expansion item. Both will need coding
503 adjustment for any calls to smtp_printf() to match the new function
504 signature; a FALSE value for the new argument is always safe.
506 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
507 the file-offset (which the Linux syscall does, and exim expects); this
508 resulted in an indefinite loop.
510 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
511 to do ARC verification. The Authentication-Results: header line added
512 by the configuration then had no ARC item.
518 JH/01 Remove code calling the customisable local_scan function, unless a new
519 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
521 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
522 non-signal-safe functions being used.
524 JH/03 Bug 2269: When presented with a received message having a stupidly large
525 number of DKIM-Signature headers, disable DKIM verification to avoid
526 a resource-consumption attack. The limit is set at twenty.
528 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
529 report of oldest_pass in ${authres } in consequence, and separate out
530 some descriptions of reasons for verification fail.
532 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
533 files in the spool were present and unlocked. A queue-runner could spot
534 them, resulting in a duplicate delivery. Fix that by doing the unlock
535 after the unlink. Investigation by Tim Stewart. Take the opportunity to
536 add more error-checking on spoolfile handling while that code is being
539 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
540 No known attacks, no CVE, this is defensive hardening.
542 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
543 a queue-runner could start a delivery while other operations were ongoing.
544 Cutthrough delivery was a common victim, resulting in duplicate delivery.
545 Found and investigated by Tim Stewart. Fix by using the open message data
546 file handle rather than opening another, and not locally closing it (which
547 releases a lock) for that case, while creating the temporary .eml format
548 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
550 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
551 $sender_verify_failure/$recipient_verify_failure to "random".
553 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
556 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
557 Previously this would segfault.
559 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
562 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
563 like zero, since the resolver should be doing this for us, But we need one
564 as a CNAME but no MX presence gets the CNAME returned; we need to check
565 that doesn't point to an MX to declare it "no MX returned" rather than
566 "error, loop". A new main option is added so the older capability of
567 following some limited number of chain links is maintained.
569 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
571 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
572 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
573 now-deprecated earlier definitions used only specified the range up to TLS
574 1.2 (in the older-version library docs).
576 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
578 JH/15 Rework TLS client-side context management. Stop using a global, and
579 explicitly pass a context around. This enables future use of TLS for
580 connections to service-daemons (eg. malware scanning) while a client smtp
581 connection is using TLS; with cutthrough connections this is quite likely.
583 JH/16 Fix ARC verification to do AS checks in reverse order.
585 JH/17 Support a "tls" option on the ${readsocket } expansion item.
587 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
588 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
589 Previously the "utf8" would be re-prepended for every additional message.
591 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
592 Previously thery were accepted, resulting in issues when attempting to
593 forward messages to a non-supporting MTA.
595 PP/02 Let -n work with printing macros too, not just options.
597 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
598 one parent address was copied, and bogus data was used at delivery-logging
599 time. Either a crash (after delivery) or bogus log data could result.
600 Discovery and analysis by Tim Stewart.
602 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
603 Previously if the string ended mid-character, we did not insert the
604 promised '?' replacement.
606 PP/04 Documentation: current string operators work on bytes, not codepoints.
608 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
609 should pack well giving a smaller memory footprint so better caching and
610 therefore performance. Group the declarations where this can't be done so
611 that the byte-sized flag variables are not interspersed among pointer
612 variables, giving a better chance of good packing by the compiler.
614 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
615 non-null, to avoid issues with sites running BATV. Previously reports were
616 sent with an empty envelope sender so looked like bounces.
618 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
619 The ignore_error flag wasn't being returned from the filter subprocess so
620 was not set for later routers. Investigation and fix by Matthias Kurz.
622 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
623 and a msg:complete for the whole, when a message is manually removed using
624 -Mrm. Developement by Matthias Kurz, hacked on by JH.
626 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
627 a "Gnu special" function, asprintf() in the DB utility binary builds; I
628 hope that is portable enough.
630 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
631 requiring a known-CA anchor certificate; make it now rely entirely on the
632 TLSA as an anchor. Checking the name on the leaf cert against the name
633 on the A-record for the host is still done for TA (but not for EE mode).
635 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
636 included in delivery lines for non-proxied connections, when compiled with
637 SUPPORT_SOCKS and running with proxy logging enabled.
639 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
640 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
641 move the existing event to fire before the normal logging of message
642 failure so that custom logging is bracketed by normal logging.
644 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
645 msg:fail:internal event. Developement by Matthias Kurz.
647 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
648 far too small for todays use of crypto signatures stored there. Go all
649 the way to the max DNS message size of 64kB, even though this might be
650 overmuch for IOT constrained device use.
652 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
653 copy a string over itself. The library routine is documented as not
654 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
656 JH/32 For main options check_spool_space and check_inode_space, where the
657 platform supports 64b integers, support more than the previous 2^31 kB
658 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
659 the previous G, M, k.
661 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
662 $authenticated_fail_id variable on authentication failure. Previously
665 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
666 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
667 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
668 GNUTLS_SEC_PARAM_MEDIUM.
670 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
671 side. Previously we would continue as if no SNI had been received.
673 JH/36 Harden the handling of string-lists. When a list consisted of a sole
674 "<" character, which should be a list-separator specification, we walked
675 off past the nul-terimation.
677 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
678 causes) even when the retry time is not yet met. Previously they were
679 not, meaning that when (say) an account was over-quota and temp-rejecting,
680 and multiple senders' messages were queued, only one sender would get
681 notified on each configured delay_warning cycle.
683 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
685 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
686 cipher-suites, an error can be left on the stack even for a succeeding
687 accept; this results in impossible error messages when a later operation
690 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
691 return error codes indicating retry. Under TLS1.3 this becomes required.
693 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
694 it only wrote the new authenticators, resulting in a lack of tracking of
695 peer changes of ESMTP extensions until the next cache flush.
697 JH/41 Fix the loop reading a message header line to check for integer overflow,
698 and more-often against header_maxsize. Previously a crafted message could
699 induce a crash of the recive process; now the message is cleanly rejected.
701 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
702 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
708 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
709 When redis_servers is set to a list of > 1 element, and the Redis servers
710 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
711 case of MOVED into a DEFER case instead, thus moving the query onto the
712 next server in the list. For a cluster of N elements, all N servers must
713 be defined in redis_servers.
715 GF/02 Catch and remove uninitialized value warning in exiqsumm
716 Check for existence of @ARGV before looking at $ARGV[0]
718 JH/01 Replace the store_release() internal interface with store_newblock(),
719 which internalises the check required to safely use the old one, plus
720 the allocate and data copy operations duplicated in both (!) of the
721 extant use locations.
723 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
724 modifier. This matches the restriction on the commandline.
726 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
727 Previously only the last row was returned.
729 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
730 we assumed that tags in the header were well-formed, and parsed the
731 element content after inspecting only the first char of the tag.
732 Assumptions at that stage could crash the receive process on malformed
735 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
736 While running the DKIM ACL we operate on the Permanent memory pool so that
737 variables created with "set" persist to the DATA ACL. Also (at any time)
738 DNS lookups that fail create cache records using the Permanent pool. But
739 expansions release any allocations made on the current pool - so a dnsdb
740 lookup expansion done in the DKIM ACL releases the memory used for the
741 DNS negative-cache, and bad things result. Solution is to switch to the
742 Main pool for expansions.
743 While we're in that code, add checks on the DNS cache during store_reset,
744 active in the testsuite.
745 Problem spotted, and debugging aided, by Wolfgang Breyha.
747 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
748 When none of the hosts presented to a transport match an already-open
749 connection, close it and proceed with the list. Previously we would
750 queue the message. Spotted by Lena with Yahoo, probably involving
753 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
754 Previously a spurious "250 OK id=" response was appended to the proper
757 JH/08 The "support for" informational output now, which built with Content
758 Scanning support, has a line for the malware scanner interfaces compiled
759 in. Interface can be individually included or not at build time.
761 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
762 by the template makefile "src/EDITME". The "STREAM" support for an older
763 ClamAV interface method is removed.
765 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
766 rows affected is given instead).
768 JH/11 The runtime Berkeley DB library version is now additionally output by
769 "exim -d -bV". Previously only the compile-time version was shown.
771 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
772 SMTP connection. Previously, when one had more receipients than the
773 first, an abortive onward connection was made. Move to full support for
774 multiple onward connections in sequence, handling cutthrough connection
775 for all multi-message initiating connections.
777 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
778 routers. Previously, a multi-recipient message would fail to match the
779 onward-connection opened for the first recipient, and cause its closure.
781 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
782 a timeout on read on a GnuTLS initiating connection, resulting in the
783 initiating connection being dropped. This mattered most when the callout
784 was marked defer_ok. Fix to keep the two timeout-detection methods
787 JH/15 Relax results from ACL control request to enable cutthrough, in
788 unsupported situations, from error to silently (except under debug)
789 ignoring. This covers use with PRDR, frozen messages, queue-only and
792 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
794 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
795 metadata, resulting in a crash in free().
797 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
798 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
799 Broken also in d185889f4, with init system revamp.
801 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
802 Previously we abruptly closed the connection after reading a malware-
803 found indication; now we go on to read the "scan ok" response line,
806 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
807 ACL. Previously, a crash would result.
809 JH/19 Speed up macro lookups during configuration file read, by skipping non-
810 macro text after a replacement (previously it was only once per line) and
811 by skipping builtin macros when searching for an uppercase lead character.
813 JH/20 DANE support moved from Experimental to mainline. The Makefile control
814 for the build is renamed.
816 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
817 was allocated for every new TLS startup, meaning one per message. Fix
818 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
820 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
821 reported the original. Fix to report (as far as possible) the ACL
822 result replacing the original.
824 JH/23 Fix memory leak during multi-message connections using STARTTLS under
825 OpenSSL. Certificate information is loaded for every new TLS startup,
826 and the resources needed to be freed.
828 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
830 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
833 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
834 DATA response info to the (existing) per-recipient response info for
835 the "C=" log element. It can have useful tracking info from the
836 destination system. Patch from Simon Arlott.
838 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
839 length value. Previously this would segfault.
841 HS/02 Support Avast multiline protoocol, this allows passing flags to
842 newer versions of the scanner.
844 JH/28 Ensure that variables possibly set during message acceptance are marked
845 dead before release of memory in the daemon loop. This stops complaints
846 about them when the debug_store option is enabled. Discovered specifically
847 for sender_rate_period, but applies to a whole set of variables.
848 Do the same for the queue-runner and queue-list loops, for variables set
849 from spool message files. Do the same for the SMTP per-message loop, for
850 certain variables indirectly set in ACL operations.
852 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
853 as a multi-recipient message from a mailinglist manager). The coding had
854 an arbitrary cutoff number of characters while checking for more input;
855 enforced by writing a NUL into the buffer. This corrupted long / fast
856 input. The problem was exposed more widely when more pipelineing of SMTP
857 responses was introduced, and one Exim system was feeding another.
858 The symptom is log complaints of SMTP syntax error (NUL chars) on the
859 receiving system, and refused recipients seen by the sending system
860 (propating to people being dropped from mailing lists).
861 Discovered and pinpointed by David Carter.
863 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
864 replaced by the ${authresults } expansion.
866 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
868 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
869 allows proper process termination in container environments.
871 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
872 Previously the "final dot" had a newline after it; ensure it is CR,LF.
874 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
875 and "err_perm", deprecated since 4.83 when the RFC-defined words
876 "temperror" and "permerror" were introduced.
878 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
879 transport-filters or DKIM-signing. The restriction was lost in the
880 consolidation of verify-callout and delivery SMTP handling.
881 Extend the restriction to also cover ARC-signing.
883 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
884 in defer=pass mode supply a 450 to the initiator. Previously the message
887 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
888 tls_require_ciphers is used as before.
890 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
891 "pass_unscanned". Only tmpfails from the scanner are written to
892 the paniclog, as they may require admin intervention (permission
893 denied, license issues). Other scanner errors (like decompression
894 bombs) do not cause a paniclog entry.
896 JH/36 Fix reinitialisation of DKIM logging variable between messages.
897 Previously it was possible to log spurious information in receive log
900 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
901 triggered odd behaviour from Outlook Express clients.
903 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
906 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
907 since the IETF WG has not yet settled on that versus the original
908 "bare" representation.
910 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
911 Previously the millisecond value corrupted the output.
912 Fix also for syslog_pid=no and log_selector +pid, for which the pid
913 corrupted the output.
919 JH/01 Rework error string handling in TLS interface so that the caller in
920 more cases is responsible for logging. This permits library-sourced
921 string to be attached to addresses during delivery, and collapses
922 pairs of long lines into single ones.
924 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
925 during configuration. Wildcards are allowed and expanded.
927 JH/02 Rework error string handling in DKIM to pass more info back to callers.
928 This permits better logging.
930 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
931 do not close it down and have the child transport start it up again on
932 the passed-on TCP connection. Instead, proxy the child (and any
933 subsequent ones) for TLS via a unix-domain socket channel. Logging is
934 affected: the continued delivery log lines do not have any DNSSEC, TLS
935 Certificate or OCSP information. TLS cipher information is still logged.
937 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
938 identical IP addresses on different listening ports. Will also affect
941 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
942 add noisy ifdef guards to special-case this sillyness.
943 Patch from Bernd Kuhls.
945 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
946 than 255 are no longer allowed.
948 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
949 Disable the session-cache too, which might reduce our load. Since we
950 currrectly use a new context for every connection, both as server and
951 client, there is no benefit for these.
952 GnuTLS appears to not support tickets server-side by default (we don't
953 call gnutls_session_ticket_enable_server()) but client side is enabled
954 by default on recent versions (3.1.3 +) unless the PFS priority string
957 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
958 <https://reproducible-builds.org/specs/source-date-epoch/>.
960 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
961 the check for any unsuccessful recipients did not notice the limit, and
962 erroneously found still-pending ones.
964 JH/08 Pipeline CHUNKING command and data together, on kernels that support
965 MSG_MORE. Only in-clear (not on TLS connections).
967 JH/09 Avoid using a temporary file during transport using dkim. Unless a
968 transport-filter is involved we can buffer the headers in memory for
969 creating the signature, and read the spool data file once for the
970 signature and again for transmission.
972 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
973 4.77 as the kernel support then wasn't solid, having issues in 64bit
974 mode. Now, it's been long enough. Add support for FreeBSD also.
976 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
977 case where the routing stage had gathered several addresses to send to
978 a host before calling the transport for the first, we previously failed
979 to close down TLS in the old transport process before passing the TCP
980 connection to the new process. The new one sent a STARTTLS command
981 which naturally failed, giving a failed delivery and bloating the retry
982 database. Investigation and fix prototype from Wolfgang Breyha.
984 JH/12 Fix check on SMTP command input synchronisation. Previously there were
985 false-negatives in the check that the sender had not preempted a response
986 or prompt from Exim (running as a server), due to that code's lack of
987 awareness of the SMTP input buffering.
989 PP/04 Add commandline_checks_require_admin option.
990 Exim drops privileges sanely, various checks such as -be aren't a
991 security problem, as long as you trust local users with access to their
992 own account. When invoked by services which pass untrusted data to
993 Exim, this might be an issue. Set this option in main configuration
994 AND make fixes to the calling application, such as using `--` to stop
997 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
998 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
999 responses to those, into a single TLS record each way (this usually means
1000 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1003 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1004 affects you only if you're dancing at the edge of the param size limits.
1005 If you are, and this message makes sense to you, then: raise the
1006 configured limit or use OpenSSL 1.1. Nothing we can do for older
1009 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1010 cmdline element to get the documented default one. Previously it was
1013 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1014 are unsuable for non-message-specific reasons - eg. connection timeout,
1015 banner-time rejection.
1017 JH/16 Fix logging of delivery remote port, when specified by router, under
1020 PP/06 Repair manualroute's ability to take options in any order, even if one
1021 is the name of a transport.
1024 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1026 JH/17 Change the list-building routines interface to use the expanding-string
1027 triplet model, for better allocation and copying behaviour.
1029 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1030 Previously it was constructed the first time a possibly-matching string
1031 was met in the configuration file input during startup; now it is done
1034 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1035 compatible one, to avoid the (poorly documented) possibility of a config
1036 file in the working directory redirecting the DB files, possibly correpting
1037 some existing file. CVE-2017-10140 assigned for BDB.
1039 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1040 cache-hot. Previously, although the result was properly cached, the
1041 initial verify call returned a defer.
1043 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1044 the main verify for receipient in uncached-mode.
1046 JH/22 Retire historical build files to an "unsupported" subdir. These are
1047 defined as "ones for which we have no current evidence of testing".
1049 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1050 if present. Previously it was ignored.
1052 JH/24 Start using specified-initialisers in C structure init coding. This is
1053 a C99 feature (it's 2017, so now considered safe).
1055 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1056 if was a fixed-sized field and bitmask ops via macros; it is now more
1059 PP/07 GitHub PR 56: Apply MariaDB build fix.
1060 Patch provided by Jaroslav Å karvada.
1062 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1063 during Coverity cleanups [4.87 JH/47]
1064 Diagnosis and fix provided by Michael Fischer v. Mollard.
1066 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1067 the right size to place the terminating semicolon on its own folded
1068 line, the header hash was calculated to an incorrect value thanks to
1069 the (relaxed) space the fold became.
1071 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1072 and confused the parent.
1074 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1075 which could crash as a result. This could lead to undeliverable messages.
1077 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1080 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1081 matters on fast-turnover and PID-randomising systems, which were getting
1082 out-of-order delivery.
1084 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1085 a possibly-overlapping copy. The symptom was that "Remote host closed
1086 connection in response to HELO" was logged instead of the actual 4xx
1089 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1090 Previously only that bufferd was discarded, resulting in SYMTP command
1093 JH/32 DKIM: when a message has multiple signatures matching an identity given
1094 in dkim_verify_signers, run the dkim acl once for each. Previously only
1095 one run was done. Bug 2189.
1097 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1098 "panic the current process" to "deliberately defer". The panic log is
1099 still written with the problem list name; the mail and reject logs now
1100 get a temp-reject line for the message that was being handled, saying
1101 something like "domains check lookup or other defer". The SMTP 451
1102 message is still "Temporary local problem".
1104 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1105 A crafted sequence of BDAT commands could result in in-use memory beeing
1106 freed. CVE-2017-16943.
1108 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1109 from SMTP input. Previously it was always done; now only done for DATA
1110 and not BDAT commands. CVE-2017-16944.
1112 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1113 to the message (such as an overlong header line). Previously this was
1114 not done and we did not exit BDAT mode. Followon from the previous item
1115 though a different problem.
1121 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1122 than -2003 did; needs libidn2 in addition to libidn.
1124 JH/02 The path option on a pipe transport is now expanded before use.
1126 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1127 Patch provided by "Björn", documentation fix added too.
1129 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1130 missing a wire-to-host endian conversion.
1132 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1133 close after a BDAT command line could be taken as a following command,
1134 giving a synch failure. Fix by only checking for synch immediately
1135 before acknowledging the chunk.
1137 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1138 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1139 macro. Patches provided by Josh Soref.
1141 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1142 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1143 by IANA as a service extension. However, John Klensin suggests that we
1146 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1147 the dkim code may be unix-mode line endings rather than smtp wire-format
1148 CRLF, so prepend a CR to any bare LF.
1150 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1151 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1153 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1154 the first were themselves being wrongly included in the feed into dkim
1155 processing; with most chunk sizes in use this resulted in an incorrect
1156 body hash calculated value.
1158 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1159 DKIM signature block, for verification. Although advised against by
1160 standards it is specifically not ruled illegal.
1162 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1164 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1165 missing a body hash (the bh= tag).
1167 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1168 It seems that HAProxy sends the Proxy Protocol information in clear and
1169 only then does a TLS startup, so do the same.
1171 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1172 TCP connections (such as for Spamd) unless the daemon successfully set
1173 Fast Open mode on its listening sockets. This fixes breakage seen on
1174 too-old kernels or those not configured for Fast Open, at the cost of
1175 requiring both directions being enabled for TFO, and TFO never being used
1176 by non-daemon-related Exim processes.
1178 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1179 endings, at least on the first header line. Try to canonify any that get
1180 past that check, despite the cost.
1182 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1183 now limited to an arbitrary five deep, while parsing addresses with the
1184 strip_excess_angle_brackets option enabled.
1186 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1187 instead leave the unprompted TLS handshake in socket buffer for the
1188 TLS library to consume.
1190 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1192 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1194 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1195 region in one operation, for speed, and this leaves assigned pointers
1196 dangling. Add checks run only under the testsuite which checks all
1197 variables at a store-reset and panics on a dangling pointer; add code
1198 explicitly nulling out all the variables discovered. Fixes one known
1199 bug: a transport crash, where a dangling pointer for $sending_ip_address
1200 originally assigned in a verify callout, is re-used.
1202 PP/06 Drop '.' from @INC in various Perl scripts.
1204 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1206 PP/08 Reduce a number of compilation warnings under clang; building with
1207 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1208 should be warning-free.
1210 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1212 HS/01 Fix portability problems introduced by PP/08 for platforms where
1213 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1215 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1216 chunk. This allows us to accept broken chunked messages. We need a more
1217 general solution here.
1219 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1220 already-broken messages in the queue.
1222 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1224 JH/19 Fix reference counting bug in routing-generated-address tracking.
1230 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1231 supports it and a size is available (ie. the sending peer gave us one).
1233 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1234 years of being deprecated). The replacements are the ACLs
1235 acl_smtp_mime and acl_not_smtp_mime.
1237 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1238 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1239 or even an in-clear connection were permitted. Now, if the host lookup
1240 was dnssec and dane was requested then the host is only used if the
1241 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1242 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1243 if one fails this test.
1244 This means that a poorly-configured remote DNS will make it incommunicado;
1245 but it protects against a DNS-interception attack on it.
1247 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1248 non-noisy when a race steals the message being considered.
1250 JH/05 If main configuration option tls_certificate is unset, generate a
1251 self-signed certificate for inbound TLS connections.
1253 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1254 in rewrites and routers.
1256 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1257 and logged a warning sing 4.83; now they are a configuration file error.
1259 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1260 (lacking @domain). Apply the same qualification processing as RCPT.
1262 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1264 JH/10 Support ${sha256:} applied to a string (as well as the previous
1267 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1268 a cutthrough deliver is pending, as we always want to make a connection.
1269 This also avoids re-routing the message when later placing the cutthrough
1270 connection after a verify cache hit.
1271 Do not update it with the verify result either.
1273 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1274 when routing results in more than one destination address.
1276 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1277 signing (which inhibits the cutthrough capability). Previously only
1278 the presence of an option was tested; now an expansion evaluating as
1279 empty is permissible (obviously it should depend only on data available
1280 when the cutthrough connection is made).
1282 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1283 the relevant preceding SMTP command did not note the pipelining mode.
1285 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1286 Previously they were not counted.
1288 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1289 as one having no matching records. Previously we deferred the message
1290 that needed the lookup.
1292 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1293 distinguished as "(=".
1295 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1296 for missing MX records. Previously it only worked for missing A records.
1298 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1300 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1301 after the data-go-ahead and data-ack. Patch from Jason Betts.
1303 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1304 even for a "none" policy. Patch from Tony Meyer.
1306 JH/22 Fix continued use of a connection for further deliveries. If a port was
1307 specified by a router, it must also match for the delivery to be
1310 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1311 When one of the recipients of a message was unsuitable for the connection
1312 (has no matching addresses), we lost track of needing to mark it
1313 deferred. As a result mail would be lost.
1315 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1317 JH/25 Decoding ACL controls is now done using a binary search; the source code
1318 takes up less space and should be simpler to maintain. Merge the ACL
1319 condition decode tables also, with similar effect.
1321 JH/26 Fix problem with one_time used on a redirect router which returned the
1322 parent address unchanged. A retry would see the parent address marked as
1323 delivered, so not attempt the (identical) child. As a result mail would
1326 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1327 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1328 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1331 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1332 Main config options check_{log,spool}_{inodes,space} are now
1333 100 inodes, 10MB unless set otherwise in the configuration.
1335 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1336 Previously it only applied to the main-section connection policy
1339 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1341 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1342 by me. Added RFC7919 DH primes as an alternative.
1344 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1345 are not in the system include path.
1347 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1348 GnuTLS, when a session startup failed (eg because the client disconnected)
1349 Exim did stdio operations after fclose. This was exposed by a recent
1350 change which nulled out the file handle after the fclose.
1352 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1353 signed directly by the cert-signing cert, rather than an intermediate
1354 OCSP-signing cert. This is the model used by LetsEncrypt.
1356 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1358 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1359 an incoming connection.
1361 HS/02 Bug 1802: Do not half-close the connection after sending a request
1364 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1365 fallback to "prime256v1".
1367 JH/34 SECURITY: Use proper copy of DATA command in error message.
1368 Could leak key material. Remotely exploitable. CVE-2016-9963.
1374 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1375 and 3.4.4 - once the server is enabled to respond to an OCSP request
1376 it does even when not requested, resulting in a stapling non-aware
1377 client dropping the TLS connection.
1379 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1380 support variable-length bit vectors. No functional change.
1382 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1383 The I= interface field on outgoing lines is now after the H= remote
1384 host field, same as incoming lines. There is a separate
1385 outgoing_interface log selector which allows you to disable the
1388 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1389 If not running log_selector +smtp_connection the mainlog would be held
1390 open indefinitely after a "too many connections" event, including to a
1391 deleted file after a log rotate. Leave the per net connection logging
1392 leaving it open for efficiency as that will be quickly detected by the
1393 check on the next write.
1395 HS/01 Bug 1671: Fix post transport crash.
1396 Processing the wait-<transport> messages could crash the delivery
1397 process if the message IDs didn't exist for some reason. When
1398 using 'split_spool_directory=yes' the construction of the spool
1399 file name failed already, exposing the same netto behaviour.
1401 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1402 mime_regex ACL conditions.
1404 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1405 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1406 to HELO, local diagnostic string.
1408 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1409 log line to debug. Even when configured with a tls authenticator many
1410 client connections are expected to not authenticate in this way, so
1411 an authenticate fail is not an error.
1413 HS/02 Add the Exim version string to the process info. This way exiwhat
1414 gives some more detail about the running daemon.
1416 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1417 matter for fast-change records such as DNSBLs.
1419 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1420 retry record, even if constant. There may be multiple transports with
1421 different interface settings and the retry behaviour needs to be kept
1424 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1426 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1428 JH/10 Bug 840: fix log_defer_output option of pipe transport
1430 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1431 hosts_randomize. This matters a lot when combined with mua_wrapper.
1433 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1434 ${quote_pgsql:<string>} operator.
1436 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1438 JH/14 Change header file name for freeradius-client. Relevant if compiling
1439 with Radius support; from the Gentoo tree and checked under Fedora.
1441 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1443 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1444 option transport_filter, meaning no filtering.
1446 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1448 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1449 defaults to "*" (all hosts). The variable is now available when not built
1450 with TLS, default unset, mainly to enable keeping the testsuite sane.
1451 If a server certificate is not supplied (via tls_certificate) an error is
1452 logged, and clients will find TLS connections fail on startup. Presumably
1453 they will retry in-clear.
1454 Packagers of Exim are strongly encouraged to create a server certificate
1455 at installation time.
1457 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1458 with the $config_file variable.
1460 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1461 in transport context, after the attempt, and per-recipient. The latter type
1462 is per host attempted. The event data is the error message, and the errno
1463 information encodes the lookup type (A vs. MX) used for the (first) host,
1464 and the trailing two digits of the smtp 4xx response.
1466 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1467 to write to mainlog (or rejectlog, paniclog) in the window between file
1468 creation and permissions/ownership being changed. Particularly affects
1469 installations where exicyclog is run as root, rather than exim user;
1470 result is that the running daemon panics and dies.
1472 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1474 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1475 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1476 "pri" and "weight". Note that the previous implicit priority given by the
1477 list order is no longer honoured.
1479 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1480 for DKIM processing.
1482 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1483 by defining SUPPORT_SOCKS.
1485 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1486 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1487 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1488 variables are renamed to proxy_{local,external}_{address,port}.
1490 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1491 for a build by defining SUPPORT_I18N
1493 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1494 of the query string, and make ${quote_redis:} do that quoting.
1496 JH/29 Move Events support from Experimental to mainline, enabled by default
1497 and removable for a build by defining DISABLE_EVENT.
1499 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1501 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1502 cached by the daemon.
1504 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1505 by defining LOOKUP_REDIS. The libhiredis library is required.
1507 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1508 keys are given for lookup.
1510 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1511 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1512 only supported when built with TLS support. The PolarSSL SHA routines
1513 are still used when the TLS library is too old for convenient support.
1515 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1516 openssl_options), for security. OpenSSL forces this from version 1.1.0
1517 server-side so match that on older versions.
1519 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1520 allocation for $value could be released as the expansion processing
1521 concluded, but leaving the global pointer active for it.
1523 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1524 and to use the domains and local_parts ACL conditions.
1526 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1527 incorrectly not doubled on cutthrough transmission, hence seen as a
1528 body-termination at the receiving system - resulting in truncated mails.
1529 Commonly the sender saw a TCP-level error, and retransmitted the message
1530 via the normal store-and-forward channel. This could result in duplicates
1531 received - but deduplicating mailstores were liable to retain only the
1532 initial truncated version.
1534 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1536 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1538 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1539 we're in there, support oversigning also; bug 1309.
1541 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1543 HS/04 Add support for keep_environment and add_environment options.
1545 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1546 either intentional arithmetic overflow during PRNG, or testing config-
1549 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1550 delivery resulted in actual delivery. Cancel cutthrough before DATA
1553 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1554 rejects a recipient: pass the reject to the originator.
1556 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1557 Many were false-positives and ignorable, but it's worth fixing the
1560 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1561 for the new environment-manipulation done at startup. Move the routines
1562 from being local to tls.c to being global via the os.c file.
1564 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1565 an extract embedded as result-arg for a map, the first arg for extract
1566 is unavailable so we cannot tell if this is a numbered or keyed
1567 extraction. Accept either.
1573 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1576 JH/02 The smtp transport option "multi_domain" is now expanded.
1578 JH/03 The smtp transport now requests PRDR by default, if the server offers
1581 JH/04 Certificate name checking on server certificates, when exim is a client,
1582 is now done by default. The transport option tls_verify_cert_hostnames
1583 can be used to disable this per-host. The build option
1584 EXPERIMENTAL_CERTNAMES is withdrawn.
1586 JH/05 The value of the tls_verify_certificates smtp transport and main options
1587 default to the word "system" to access the system default CA bundle.
1588 For GnuTLS, only version 3.0.20 or later.
1590 JH/06 Verification of the server certificate for a TLS connection is now tried
1591 (but not required) by default. The verification status is now logged by
1592 default, for both outbound TLS and client-certificate supplying inbound
1595 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1598 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1599 Status Notification (bounce) messages are now MIME format per RFC 3464.
1600 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1601 under the control of the dsn_advertise_hosts option, and routers may
1602 have a dsn_lasthop option.
1604 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1605 default, modifiable by a malware= option. The list separator for
1606 the options can now be changed in the usual way. Bug 68.
1608 JH/10 The smtp_receive_timeout main option is now expanded before use.
1610 JH/11 The incoming_interface log option now also enables logging of the
1611 local interface on delivery outgoing connections.
1613 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1614 if the interface and destination host and port all match.
1616 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1619 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1620 Patch from Andrew Lewis.
1622 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1623 now supports optional time-restrictions, weighting, and priority
1624 modifiers per server. Patch originally by <rommer@active.by>.
1626 JH/16 The spamd_address main option now supports a mixed list of local
1627 and remote servers. Remote servers can be IPv6 addresses, and
1628 specify a port-range.
1630 JH/17 Bug 68: The spamd_address main option now supports an optional
1631 timeout value per server.
1633 JH/18 Bug 1581: Router and transport options headers_add/remove can
1634 now have the list separator specified.
1636 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1639 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1642 JH/21 Support for the A6 type of dns record is withdrawn.
1644 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1645 rather than the verbs used.
1647 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1648 from 255 to 1024 chars.
1650 JH/24 Verification callouts now attempt to use TLS by default.
1652 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1653 are generic router options now. The defaults didn't change.
1655 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1656 Original patch from Alexander Shikoff, worked over by JH.
1658 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1659 files if ZCAT_COMMAND is not executable.
1661 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1663 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1665 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1666 Normally benign, it bites when the pair was led to by a CNAME;
1667 modern usage is to not canonicalize the domain to a CNAME target
1668 (and we were inconsistent anyway for A-only vs AAAA+A).
1670 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1672 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1673 when evaluating $sender_host_dnssec.
1675 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1676 $sender_helo_dnssec variable.
1678 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1680 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1682 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1684 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1685 documented as working, but never had. Support all but $spam_report.
1687 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1688 added for tls authenticator.
1690 HS/03 Add perl_taintmode main config option
1696 TL/01 When running the test suite, the README says that variables such as
1697 no_msglog_check are global and can be placed anywhere in a specific
1698 test's script, however it was observed that placement needed to be near
1699 the beginning for it to behave that way. Changed the runtest perl
1700 script to read through the entire script once to detect and set these
1701 variables, reset to the beginning of the script, and then run through
1702 the script parsing/test process like normal.
1704 TL/02 The BSD's have an arc4random API. One of the functions to induce
1705 adding randomness was arc4random_stir(), but it has been removed in
1706 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1707 function when detected.
1709 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1710 cause callback expansion.
1712 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1713 syntax errors in an expansion can be treated as a string instead of
1714 logging or causing an error, due to the internal use of bool_lax
1715 instead of bool when processing it.
1717 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1718 server certificates when making smtp deliveries.
1720 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1722 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1724 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1726 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1727 Merged patch from Sebastian Wiedenroth.
1729 JH/05 Fix results-pipe from transport process. Several recipients, combined
1730 with certificate use, exposed issues where response data items split
1731 over buffer boundaries were not parsed properly. This eventually
1732 resulted in duplicates being sent. This issue only became common enough
1733 to notice due to the introduction of connection certificate information,
1734 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1736 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1737 size buffer was used, resulting in syntax errors when an expansion
1740 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1741 version 3.3.6 or later.
1743 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1744 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1745 both become "event_action", the variables become $event_name, $event_data
1746 and $event_defer_errno. There is a new variable $verify_mode, usable in
1747 routers, transports and related events. The tls:cert event is now also
1748 raised for inbound connections, if the main configuration event_action
1751 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1752 early OCSP support, but no stapling (appears to be less than 1.0.0).
1754 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1755 server certificate names available under the smtp transport option
1756 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1759 JH/10 Time-related extraction expansions from certificates now use the main
1760 option "timezone" setting for output formatting, and are consistent
1761 between OpenSSL and GnuTLS compilations. Bug 1541.
1763 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1764 encoded parameter in the incoming message. Bug 1558.
1766 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1767 include certificate info, eximon was claiming there were spoolfile
1770 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1772 JH/14 Log delivery-related information more consistently, using the sequence
1773 "H=<name> [<ip>]" wherever possible.
1775 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1776 are problematic for Debian distribution, omit them from the release
1779 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1781 JH/16 Fix string representation of time values on 64bit time_t architectures.
1784 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1785 output list separator was used.
1790 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1791 checkers that were complaining about end of non-void function with no
1794 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1795 This was a regression introduced in 4.83 by another bugfix.
1797 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1799 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1800 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1806 TF/01 Correctly close the server side of TLS when forking for delivery.
1808 When a message was received over SMTP with TLS, Exim failed to clear up
1809 the incoming connection properly after forking off the child process to
1810 deliver the message. In some situations the subsequent outgoing
1811 delivery connection happened to have the same fd number as the incoming
1812 connection previously had. Exim would try to use TLS and fail, logging
1813 a "Bad file descriptor" error.
1815 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1816 utilities have not been installed.
1818 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1819 temporary space as the ACL may create new global variables.
1821 TL/01 LDAP support uses per connection or global context settings, depending
1822 upon the detected version of the libraries at build time.
1824 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1825 to extract and use the src ip:port in logging and expansions as if it
1826 were a direct connection from the outside internet. PPv2 support was
1827 updated based on HAProxy spec change in May 2014.
1829 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1831 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1832 Properly escape header and check for NULL return.
1834 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1837 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1839 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1840 characters in header names, implemented as a verify condition.
1841 Contributed by Michael Fischer v. Mollard.
1843 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1844 results permerror and temperror. Previous values are deprecated but
1845 still accepted. In a future release, err_perm and err_temp will be
1846 completely removed, which will be a backward incompatibility if the
1847 ACL tests for either of these two old results. Patch contributed by
1848 user bes-internal on the mailing list.
1850 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1852 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1853 selectors, in both main and reject logs.
1855 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1858 JH/07 Add malware type "sock" for talking to simple daemon.
1860 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1862 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1863 routers/transports under cutthrough routing.
1865 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1866 numbers. Touch up "bool" conditional to keep the same definition.
1868 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1870 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1872 JH/12 Expand items in router/transport headers_add or headers_remove lists
1873 individually rather than the list as a whole. Bug 1452.
1875 Required for reasonable handling of multiple headers_ options when
1876 they may be empty; requires that headers_remove items with embedded
1877 colons must have them doubled (or the list-separator changed).
1879 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1880 view the policy declared in the DMARC record. Currently, $dmarc_status
1881 is a combined value of both the record presence and the result of the
1884 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1886 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1887 dnslookup router and the smtp transport (applying to the forward
1890 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1891 of ldap servers used for a specific lookup. Patch provided by Heiko
1894 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1895 New variable $lookup_dnssec_authenticated for observability.
1897 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1898 Patch submitted by Lars Timman.
1900 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1902 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1903 Requires trusted mode and valid format message id, aborts otherwise.
1904 Patch contributed by Heiko Schlichting.
1906 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1907 certextract with support for various fields. Bug 1358.
1909 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1910 is requested by default, modifiable by smtp transport option
1913 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1914 operate on certificate variables to give certificate fingerprints
1915 Also new ${sha256:cert_variable}.
1917 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1919 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1920 Christian Aistleitner.
1922 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1924 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1925 file. Patch from Wolfgang Breyha.
1927 JH/25 Expand the coverage of the delivery $host and $host_address to
1928 client authenticators run in verify callout. Bug 1476.
1930 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1931 align with daemon_smtp_ports. Bug 72.
1933 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1934 support and error reporting did not work properly.
1936 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1937 and is readable. Patch from Andrew Colin Kissa.
1939 TL/14 Enhance documentation of ${run expansion and how it parses the
1940 commandline after expansion, particularly in the case when an
1941 unquoted variable expansion results in an empty value.
1943 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1945 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1946 by renaming away from it. Addresses GH issue 15, reported by
1949 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1951 TL/15 SECURITY: prevent double expansion in math comparison functions
1952 (can expand unsanitized data). Not remotely exploitable.
1959 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1961 PP/02 Make -n do something, by making it not do something.
1962 When combined with -bP, the name of an option is not output.
1964 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1967 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1968 $sender_host_name and config options to manage this, and basic check
1971 PP/05 DSCP support for outbound connections and control modifier for inbound.
1973 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1974 (Only plugin which currently uses this is kerberos4, which nobody should
1975 be using, but we should make it available and other future plugins might
1976 conceivably use it, even though it would break NAT; stuff *should* be
1977 using channel bindings instead).
1979 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1980 name; added for Sendmail compatibility; requires admin caller.
1981 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1982 just ignore it); requires trusted caller.
1983 Also parse but ignore: -Ac -Am -X<logfile>
1986 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1988 TL/02 Add +smtp_confirmation as a default logging option.
1990 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1991 Patch by Magnus Holmgren from 2007-02-20.
1993 TL/04 Bugzilla 1281 - Spec typo.
1994 Bugzilla 1283 - Spec typo.
1995 Bugzilla 1290 - Spec grammar fixes.
1997 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1999 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2001 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2002 mailing list by by Dmitry Isaikin.
2004 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2006 JH/02 Support "G" suffix to numbers in ${if comparisons.
2008 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2010 NM/01 Bugzilla 1197 - Spec typo
2011 Bugzilla 1196 - Spec examples corrections
2013 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2015 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2016 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2019 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2020 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2022 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2023 "acl {{name}{arg}...}", and optional args on acl condition
2026 JH/05 Permit multiple router/transport headers_add/remove lines.
2028 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2030 JH/07 Avoid using a waiting database for a single-message-only transport.
2031 Performance patch from Paul Fisher. Bugzilla 1262.
2033 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2036 JH/09 Add $headers_added variable, with content from use of ACL modifier
2037 add_header (but not yet added to the message). Bugzilla 199.
2039 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2040 Pulled from Bugzilla 817 by Wolfgang Breyha.
2042 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2044 (nb: this is the same fix as in Exim 4.80.1)
2046 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2049 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2052 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2054 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2055 advertise SMTP AUTH mechanism to us, instead of a generic
2056 protocol violation error. Also, make Exim more robust to bad
2057 data from the Dovecot auth socket.
2059 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2061 When a queue runner is handling a message, Exim first routes the
2062 recipient addresses, during which it prunes them based on the retry
2063 hints database. After that it attempts to deliver the message to
2064 any remaining recipients. It then updates the hints database using
2067 So if a recipient address works intermittently, it can get repeatedly
2068 deferred at routing time. The retry hints record remains fresh so the
2069 address never reaches the final cutoff time.
2071 This is a fairly common occurrence when a user is bumping up against
2072 their storage quota. Exim had some logic in its local delivery code
2073 to deal with this. However it did not apply to per-recipient defers
2074 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2076 This change adds a proper retry rule check during routing so that the
2077 final cutoff time is checked against the message's age. We only do
2078 this check if there is an address retry record and there is not a
2079 domain retry record; this implies that previous attempts to handle
2080 the address had the retry_use_local_parts option turned on. We use
2081 this as an approximation for the destination being like a local
2082 delivery, as in LMTP.
2084 I suspect this new check makes the old local delivery cutoff check
2085 redundant, but I have not verified this so I left the code in place.
2087 TF/02 Correct gecos expansion when From: is a prefix of the username.
2089 Test 0254 submits a message to Exim with the header
2093 When I ran the test suite under the user fanf2, Exim expanded
2094 the header to contain my full name, whereas it should have added
2095 a Resent-Sender: header. It erroneously treats any prefix of the
2096 username as equal to the username.
2098 This change corrects that bug.
2100 GF/01 DCC debug and logging tidyup
2101 Error conditions log to paniclog rather than rejectlog.
2102 Debug lines prefixed by "DCC: " to remove any ambiguity.
2104 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2106 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2107 Bug spotted by Jeremy Harris; was flawed since initial commit.
2108 Would have resulted in OCSP responses post-SNI triggering an Exim
2109 NULL dereference and crash.
2111 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2113 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2114 Bug detection, analysis and fix by Samuel Thibault.
2115 Bugzilla 1331, Debian bug #698092.
2117 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2119 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2120 Server implementation by Todd Lyons, client by JH.
2121 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2122 config variable "prdr_enable" controls whether the server
2123 advertises the facility. If the client requests PRDR a new
2124 acl_data_smtp_prdr ACL is called once for each recipient, after
2125 the body content is received and before the acl_smtp_data ACL.
2126 The client is controlled by both of: a hosts_try_prdr option
2127 on the smtp transport, and the server advertisement.
2128 Default client logging of deliveries and rejections involving
2129 PRDR are flagged with the string "PRDR".
2131 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2132 fclose(). Diagnosis by Todd Lyons.
2134 PP/17 Update configure.default to handle IPv6 localhost better.
2135 Patch by Alain Williams (plus minor tweaks).
2138 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2139 This is now consistent with GnuTLS, and is now documented: the
2140 previous undocumented portable approach to treating the option as
2141 unset was to force an expansion failure. That still works, and
2142 an empty string is now equivalent.
2144 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2145 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2146 not performing validation itself.
2148 PP/20 Added force_command boolean option to pipe transport.
2149 Patch from Nick Koston, of cPanel Inc.
2151 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2154 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2156 PP/21 Fix eximon continuous updating with timestamped log-files.
2157 Broken in a format-string cleanup in 4.80, missed when I repaired the
2158 other false fix of the same issue.
2159 Report and fix from Heiko Schlichting.
2162 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2163 Report from Prashanth Katuri.
2165 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2166 It's SecureTransport, so affects any MacOS clients which use the
2167 system-integrated TLS libraries, including email clients.
2169 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2170 using a MIME ACL for non-SMTP local injection.
2171 Report and assistance in diagnosis by Warren Baker.
2173 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2175 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2177 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2178 last id that failed so it may be referenced in subsequent ACL's.
2180 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2183 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2184 ldap library initialization, allowing self-signed CA's to be
2185 used. Also properly sets require_cert option later in code by
2186 using NULL (global ldap config) instead of ldap handle (per
2187 session). Bug diagnosis and testing by alxgomz.
2189 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2190 the src/util/ subdirectory.
2192 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2193 renamed to Transport Post Delivery Action by Jeremy Harris, as
2196 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2197 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2198 redis_servers = needs to be configured which will be used by the redis
2199 lookup. Patch from Warren Baker, of The Packet Hub.
2201 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2203 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2204 hostname or reverse DNS when processing a host list. Used suggestions
2205 from multiple comments on this bug.
2207 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2209 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2210 Missed a few lines, added it to make the runtest require no keyboard
2213 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2214 contains upper case chars. Make router use caseful_local_part.
2216 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2217 support when GnuTLS has been built with p11-kit.
2223 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2225 This, or similar/improved, will also be change PP/11 of 4.82.
2231 PP/01 Handle short writes when writing local log-files.
2232 In practice, only affects FreeBSD (8 onwards).
2233 Bugzilla 1053, with thanks to Dmitry Isaikin.
2235 NM/01 Bugzilla 949 - Documentation tweak
2237 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2240 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2242 PP/02 Implemented gsasl authenticator.
2244 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2246 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2247 `pkg-config foo` for cflags/libs.
2249 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2250 with rest of GSASL and with heimdal_gssapi.
2252 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2253 `pkg-config foo` for cflags/libs for the TLS implementation.
2255 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2256 properties get this fed in as external SSF. A number of robustness
2257 and debugging improvements to the cyrus_sasl authenticator.
2259 PP/08 cyrus_sasl server now expands the server_realm option.
2261 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2262 Patch by Jeremy Harris.
2264 PP/10 Added dbmjz lookup type.
2266 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2268 PP/12 MAIL args handles TAB as well as SP, for better interop with
2269 non-compliant senders.
2270 Analysis and variant patch by Todd Lyons.
2272 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2273 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2274 Patch from Dirk Mueller <dmueller@suse.com>
2276 PP/13 tls_peerdn now print-escaped for spool files.
2277 Observed some $tls_peerdn in wild which contained \n, which resulted
2278 in spool file corruption.
2280 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2281 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2282 or write after TLS renegotiation, which otherwise led to messages
2285 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2286 as a tracking header (ie: a signed header comes before the signature).
2287 Patch from Wolfgang Breyha.
2289 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2290 comma-sep list; embedded commas doubled.
2292 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2294 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2296 Report and patch from Dmitry Banschikov.
2298 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2299 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2300 failures. We appear to now support TLS1.1+ with Exim.
2302 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2303 lets Exim select keys and certificates based upon TLS SNI from client.
2304 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2305 before an outbound SMTP session. New log_selector, +tls_sni.
2307 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2308 NULL dereference. Report and patch from Alun Jones.
2310 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2311 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2312 Not seeing resolver debug output on NetBSD, but suspect this is a
2313 resolver implementation change.
2315 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2316 Left warnings. Added "eximon gdb" invocation mode.
2318 PP/21 Defaulting "accept_8bitmime" to true, not false.
2320 PP/22 Added -bw for inetd wait mode support.
2322 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2323 locate the relevant includes and libraries. Made this the default.
2325 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2326 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2328 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2329 This may cause build issues on older platforms.
2331 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2332 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2333 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2334 Added SNI support via GnuTLS too.
2335 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2337 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2339 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2340 Applied second patch from Janne, implementing suggestion to default
2341 multiple-strings-in-record handling to match SPF spec.
2343 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2345 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2346 read-only, out of scope).
2347 Patch from Wolfgang Breyha, report from Stuart Northfield.
2349 PP/29 Fix three issues highlighted by clang analyser static analysis.
2350 Only crash-plausible issue would require the Cambridge-specific
2351 iplookup router and a misconfiguration.
2352 Report from Marcin Mirosław.
2354 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2356 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2357 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2358 As part of this, removing so much warning spew let me fix some minor
2359 real issues in debug logging.
2361 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2362 assignment on my part. Fixed.
2364 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2365 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2366 Janne Snabb (who went above and beyond: thank you).
2368 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2369 string otherwise requires a connection and a bunch more work and it's
2370 relatively easy to get wrong. Should also expose TLS library linkage
2373 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2374 64-bit ${eval} (JH/03).
2376 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2377 GNU libc to support some of the 64-bit stuff, should not lead to
2378 conflicts. Defined before os.h is pulled in, so if a given platform
2379 needs to override this, it can.
2381 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2382 protection layer was required, which is not implemented.
2383 Bugzilla 1254, patch from Wolfgang Breyha.
2385 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2386 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2387 tls_dhparam take prime identifiers. Also unbreak combination of
2388 OpenSSL+DH_params+TLSSNI.
2390 PP/39 Disable SSLv2 by default in OpenSSL support.
2396 PP/01 Solaris build fix for Oracle's LDAP libraries.
2397 Bugzilla 1109, patch from Stephen Usher.
2399 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2401 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2404 TF/02 Fix a couple more cases where we did not log the error message
2405 when unlink() failed. See also change 4.74-TF/03.
2407 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2408 lock up or crash if it happened to be inside a call to libc when it
2409 got a SIGUSR1 from exiwhat.
2411 The SIGUSR1 handler appends the current process status to the process
2412 log which is later printed by exiwhat. It used to use the general
2413 purpose logging code to do this, but several functions it calls are
2414 not safe for signals.
2416 The new output code in the SIGUSR1 handler is specific to the process
2417 log, and simple enough that it's easy to inspect for signal safety.
2418 Removing some special cases also simplifies the general logging code.
2419 Removing the spurious timestamps from the process log simplifies
2422 TF/04 Improved ratelimit ACL condition.
2424 The /noupdate option has been deprecated in favour of /readonly which
2425 has clearer semantics. The /leaky, /strict, and /readonly update modes
2426 are mutually exclusive. The update mode is no longer included in the
2427 database key; it just determines when the database is updated. (This
2428 means that when you upgrade Exim will forget old rate measurements.)
2430 Exim now checks that the per_* options are used with an update mode that
2431 makes sense for the current ACL. For example, when Exim is processing a
2432 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2433 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2434 must specify per_mail/readonly. If you omit the update mode it defaults to
2435 /leaky where that makes sense (as before) or /readonly where required.
2437 The /noupdate option is now undocumented but still supported for
2438 backwards compatibility. It is equivalent to /readonly except that in
2439 ACLs where /readonly is required you may specify /leaky/noupdate or
2440 /strict/noupdate which are treated the same as /readonly.
2442 A useful new feature is the /count= option. This is a generalization
2443 of the per_byte option, so that you can measure the throughput of other
2444 aggregate values. For example, the per_byte option is now equivalent
2445 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2447 The per_rcpt option has been generalized using the /count= mechanism
2448 (though it's more complicated than the per_byte equivalence). When it is
2449 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2450 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2451 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2452 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2453 Note that using per_rcpt with a non-readonly update mode in more than
2454 one ACL will cause the recipients to be double-counted. (The per_mail
2455 and per_byte options don't have this problem.)
2457 The handling of very low rates has changed slightly. If the computed rate
2458 is less than the event's count (usually one) then this event is the first
2459 after a long gap. In this case the rate is set to the same as this event's
2460 count, so that the first message of a spam run is counted properly.
2462 The major new feature is a mechanism for counting the rate of unique
2463 events. The new per_addr option counts the number of different
2464 recipients that someone has sent messages to in the last time period. It
2465 behaves like per_rcpt if all the recipient addresses are different, but
2466 duplicate recipient addresses do not increase the measured rate. Like
2467 the /count= option this is a general mechanism, so the per_addr option
2468 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2469 example, measure the rate that a client uses different sender addresses
2470 with the options per_mail/unique=$sender_address. There are further
2471 details in the main documentation.
2473 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2475 TF/06 Removed a few PCRE remnants.
2477 TF/07 Automatically extract Exim's version number from tags in the git
2478 repository when doing development or release builds.
2480 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2481 Bugzilla 879. Patch from Paul Fisher.
2483 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2484 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2487 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2489 PP/05 Variable $av_failed, true if the AV scanner deferred.
2490 Bugzilla 1078. Patch from John Horne.
2492 PP/06 Stop make process more reliably on build failure.
2493 Bugzilla 1087. Patch from Heiko Schlittermann.
2495 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2496 Bugzilla 1089. Patch from Heiko Schlittermann.
2498 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2499 Bugzilla 1131. Patch from Holger Weiß.
2501 PP/09 Handle IPv6 addresses with SPF.
2502 Bugzilla 860. Patch from Wolfgang Breyha.
2504 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2506 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2509 PP/11 match_* no longer expand right-hand-side by default.
2510 New compile-time build option, EXPAND_LISTMATCH_RHS.
2511 New expansion conditions, "inlist", "inlisti".
2513 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2515 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2517 PP/14 fix log_write() format string regression from TF/03.
2518 Bugzilla 1152. Patch from Dmitry Isaikin.
2524 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2526 PP/02 Harmonised TLS library version reporting; only show if debugging.
2527 Layout now matches that introduced for other libraries in 4.74 PP/03.
2529 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2531 PP/04 New "dns_use_edns0" global option.
2533 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2536 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2537 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2539 TK/01 Updated PolarSSL code to 0.14.2.
2540 Bugzilla 1097. Patch from Andreas Metzler.
2542 PP/07 Catch divide-by-zero in ${eval:...}.
2543 Fixes bugzilla 1102.
2545 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2548 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2549 format-string attack -- SECURITY: remote arbitrary code execution.
2551 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2552 time unintentionally subject to list matching rules, letting the header
2553 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2554 arbitrary string expansion). This allowed for information disclosure.
2556 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2557 INT_MIN/-1 -- value coerced to INT_MAX.
2563 NM/01 Workaround for PCRE version dependency in version reporting
2566 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2567 This fixes portability to compilers other than gcc, notably
2568 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2570 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2571 makefiles for portability to HP-UX and POSIX correctness.
2573 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2574 Also via indented variable definition in the Makefile.
2575 (Debugging by Oliver Heesakkers).
2577 PP/02 Restore caching of spamd results with expanded spamd_address.
2578 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2580 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2581 Improves build reliability. Fix from: Frank Elsner
2583 NM/02 Fix wide character breakage in the rfc2047 coding
2584 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2586 NM/03 Allow underscore in dnslist lookups
2587 Fixes bug 1026. Patch from Graeme Fowler
2589 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2590 Code patches from Adam Ciarcinski of NetBSD.
2592 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2595 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2596 is logged, to avoid truncation. Patch from John Horne.
2598 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2599 Patch from Jakob Hirsch.
2601 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2602 SQL string expansion failure details.
2603 Patch from Andrey Oktyabrski.
2605 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2606 Patch from Simon Arlott.
2608 PP/09 New lookups functionality failed to compile on old gcc which rejects
2609 extern declarations in function scope.
2610 Patch from Oliver Fleischmann
2612 PP/10 Use sig_atomic_t for flags set from signal handlers.
2613 Check getgroups() return and improve debugging.
2614 Fixed developed for diagnosis in bug 927 (which turned out to be
2617 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2618 Patch from Mark Zealey.
2620 PP/12 Bugzilla 1056: Improved spamd server selection.
2621 Patch from Mark Zealey.
2623 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2624 Based on patch from Heiko Schlittermann.
2626 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2627 Patch from Uwe Doering, sign-off by Michael Haardt.
2629 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2630 variable declaration deep within a block. Bug and patch from
2633 PP/15 lookups-Makefile IRIX compatibility coercion.
2635 PP/16 Make DISABLE_DKIM build knob functional.
2637 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2638 Patch by Simon Arlott
2640 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2641 variable argument macros. Our copy now differs from upstream.
2647 TF/01 Failure to get a lock on a hints database can have serious
2648 consequences so log it to the panic log.
2650 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2651 controlled using the smtp_confirmation log selector.
2653 TF/03 Include the error message when we fail to unlink a spool file.
2655 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2656 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2657 for maintaining out-of-tree patches for some time.
2659 PP/01 Bugzilla 139: Documentation and portability issues.
2660 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2661 Handle per-OS dynamic-module compilation flags.
2663 PP/02 Let /dev/null have normal permissions.
2664 The 4.73 fixes were a little too stringent and complained about the
2665 permissions on /dev/null. Exempt it from some checks.
2666 Reported by Andreas M. Kirchwitz.
2668 PP/03 Report version information for many libraries, including
2669 Exim version information for dynamically loaded libraries. Created
2670 version.h, now support a version extension string for distributors
2671 who patch heavily. Dynamic module ABI change.
2673 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2674 privilege escalation vulnerability whereby the Exim run-time user
2675 can cause root to append content of the attacker's choosing to
2678 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2681 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2682 If dropping privileges for untrusted macros, we disabled normal logging
2683 on the basis that it would fail; for the Exim run-time user, this is not
2684 the case, and it resulted in successful deliveries going unlogged.
2685 Fixed. Reported by Andreas Metzler.
2691 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2692 only prepend for the Resent-* case. Fixes regression introduced in
2693 Exim 4.70 by NM/22 for Bugzilla 607.
2695 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2696 increasing numbers of administrators be bitten by this.
2698 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2700 PP/03 Bugzilla 994: added openssl_options main configuration option.
2702 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2704 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2706 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2708 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2709 without a peer certificate, leading to a segfault because of an
2710 assumption that peers always have certificates. Be a little more
2711 paranoid. Problem reported by Martin Tscholak.
2713 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2714 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2715 NB: ClamAV planning to remove STREAM in "middle of 2010".
2716 CL also introduces -bmalware, various -d+acl logging additions and
2717 more caution in buffer sizes.
2719 PP/09 Implemented reverse_ip expansion operator.
2721 PP/10 Bugzilla 937: provide a "debug" ACL control.
2723 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2725 PP/12 Bugzilla 973: Implement --version.
2727 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2729 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2731 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2733 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2734 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2735 ignore trailing whitespace.
2737 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2739 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2742 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2743 Notification from Dr Andrew Aitchison.
2745 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2746 ExtendedDetectionInfo response format.
2747 Notification from John Horne.
2749 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2752 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2753 XSL and documented dependency on system catalogs, with examples of how
2756 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2759 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2760 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2761 configuration file which is writeable by the Exim user or group.
2763 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2764 of configuration files to cover files specified with the -C option if
2765 they are going to be used with root privileges, not just the default
2768 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2769 option (effectively making it always true).
2771 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2772 files to be used while preserving root privileges.
2774 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2775 that rogue child processes cannot use them.
2777 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2778 run-time user, instead of root.
2780 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2781 Exim run-time user without dropping privileges.
2783 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2784 result string, instead of calling string_vformat() twice with the same
2787 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2788 for other users. Others should always drop root privileges if they use
2789 -C on the command line, even for a whitelisted configure file.
2791 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2793 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2799 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2800 $data_path, and $header_path variables; fixed documentation bugs and
2803 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2804 exipick to access non-standard spools, including the "frozen" queue
2807 NM/01 Bugzilla 965: Support mysql stored procedures.
2808 Patch from Alain Williams
2810 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2812 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2813 Patch from Andreas Metzler
2815 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2816 Patch from Kirill Miazine
2818 NM/05 Bugzilla 671: Added umask to procmail example.
2820 JJ/03 installed exipick 20100323.0, fixing doc bug
2822 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2823 directory. Notification and patch from Dan Rosenberg.
2825 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2827 TK/02 Improve log output when DKIM signing operation fails.
2829 MH/01 Treat the transport option dkim_domain as a colon separated
2830 list, not as a single string, and sign the message with each element,
2831 omitting multiple occurences of the same signer.
2833 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2834 Bugzilla 985, 986. Patch by Simon Arlott
2836 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2837 Patch by Simon Arlott
2839 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2840 MBX locking. Notification from Dan Rosenberg.
2846 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2848 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2850 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2852 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2854 NM/04 Bugzilla 915: Flag broken perl installation during build.
2860 TK/01 Added patch by Johannes Berg that expands the main option
2861 "spamd_address" if it starts with a dollar sign.
2863 TK/02 Write list of recipients to X-Envelope-Sender header when building
2864 the mbox-format spool file for content scanning (suggested by Jakob
2867 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2868 (http://www.dcc-servers.net/) support via dccifd. Activated by
2869 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2871 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2872 by Mark Daniel Reidel <mr@df.eu>.
2874 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2875 When building exim an external PCRE library is now needed -
2876 PCRE is a system library on the majority of modern systems.
2877 See entry on PCRE_LIBS in EDITME file.
2879 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2880 conversation. Added nologin parameter to request.
2881 Patch contributed by Kirill Miazine.
2883 TF/01 Do not log submission mode rewrites if they do not change the address.
2885 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2887 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2888 log files in place. Contributed by Roberto Lima.
2890 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2892 TF/03 Bugzilla 615: When checking the local_parts router precondition
2893 after a local_part_suffix or local_part_prefix option, Exim now
2894 does not use the address's named list lookup cache, since this
2895 contains cached lookups for the whole local part.
2897 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2898 Robert Millan. Documentation is in experimental-spec.txt.
2900 TF/04 Bugzilla 668: Fix parallel build (make -j).
2902 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2904 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2905 Patch provided by Jan Srzednicki.
2907 TF/05 Leading white space used to be stripped from $spam_report which
2908 wrecked the formatting. Now it is preserved.
2910 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2911 that they are available at delivery time.
2913 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2915 TF/08 TLS error reporting now respects the incoming_interface and
2916 incoming_port log selectors.
2918 TF/09 Produce a more useful error message if an SMTP transport's hosts
2919 setting expands to an empty string.
2921 NM/06 Bugzilla 744: EXPN did not work under TLS.
2922 Patch provided by Phil Pennock.
2924 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2925 Patch provided by Richard Godbee.
2927 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2928 acl_smtp_notquit, added index entry.
2930 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2931 Patch provided by Eugene Bujak.
2933 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2934 accept(). Patch provided by Maxim Dounin.
2936 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2937 Patch provided by Phil Pennock.
2939 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2941 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2942 Patch provided by Brad "anomie" Jorsch.
2944 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2945 Patch provided by Dean Brooks.
2947 TK/05 Add native DKIM support (does not depend on external libraries).
2949 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2950 Patch provided by Graeme Fowler.
2952 NM/16 Bugzilla 851: Documentation example syntax fix.
2954 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2956 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2959 NM/19 Bugzilla 745: TLS version reporting.
2960 Patch provided by Phil Pennock.
2962 NM/20 Bugzilla 167: bool: condition support.
2963 Patch provided by Phil Pennock.
2965 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2966 clients. Patch provided by Phil Pennock.
2968 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2969 Patch provided by Brad "anomie" Jorsch.
2971 NM/23 Bugzilla 687: Fix misparses in eximstats.
2972 Patch provided by Heiko Schlittermann.
2974 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2975 Patch provided by Heiko Schlittermann.
2977 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2978 plus update to original patch.
2980 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2982 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2983 Patch provided by David Brownlee.
2985 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2987 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2989 NM/30 Bugzilla 888: TLS documentation bugfixes.
2991 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2993 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2994 Unlike the original bugzilla I have changed all shell scripts in src tree.
2996 NM/33 Bugzilla 898: Transport filter timeout fix.
2997 Patch by Todd Rinaldo.
2999 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3000 Patch by Serge Demonchaux.
3002 NM/35 Bugzilla 39: Base64 decode bug fixes.
3003 Patch by Jakob Hirsch.
3005 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3007 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3009 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3011 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3017 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3018 ALT-N's libdkim that I have put here:
3019 http://duncanthrax.net/exim-experimental/
3021 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3022 were called 'true' and it seems that C99 defines that as a reserved
3023 keyword to be used with 'bool' variable types. That means you could
3024 not include C99-style headers which use bools without triggering
3025 build errors in sieve.c.
3027 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3028 as mailq or other aliases. Changed the --help handling significantly
3029 to do whats expected. exim_usage() emits usage/help information.
3031 SC/01 Added the -bylocaldomain option to eximstats.
3033 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3035 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3037 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3043 PH/01 Another patch from the Sieve maintainer.
3045 PH/02 When an IPv6 address is converted to a string for single-key lookup
3046 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3047 dots are used instead of colons so that keys in lsearch files need not
3048 contain colons. This was done some time before quoting was made available
3049 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3050 (notated using the quote facility) so as to distinguish them from IPv4
3051 keys. This meant that lookups for IP addresses in host lists did not work
3052 for iplsearch lookups.
3054 This has been fixed by arranging for IPv6 addresses to be expressed with
3055 colons if the lookup type is iplsearch. This is not incompatible, because
3056 previously such lookups could never work.
3058 The situation is now rather anomalous, since one *can* have colons in
3059 ordinary lsearch keys. However, making the change in all cases is
3060 incompatible and would probably break a number of configurations.
3062 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3065 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3066 conversion specification without a maximum field width, thereby enabling
3067 a rogue spamd server to cause a buffer overflow. While nobody in their
3068 right mind would setup Exim to query an untrusted spamd server, an
3069 attacker that gains access to a server running spamd could potentially
3070 exploit this vulnerability to run arbitrary code as the Exim user.
3072 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3073 $primary_hostname instead of what libspf2 thinks the hosts name is.
3075 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3076 a directory entry by the name of the lookup key. Previously, if a
3077 symlink pointed to a non-existing file or a file in a directory that
3078 Exim lacked permissions to read, a lookup for a key matching that
3079 symlink would fail. Now it is enough that a matching directory entry
3080 exists, symlink or not. (Bugzilla 503.)
3082 PH/03 The body_linecount and body_zerocount variables are now exported in the
3085 PH/04 Added the $dnslist_matched variable.
3087 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3088 This means they are set thereafter only if the connection becomes
3091 PH/06 Added the client_condition to authenticators so that some can be skipped
3092 by clients under certain conditions.
3094 PH/07 The error message for a badly-placed control=no_multiline_responses left
3095 "_responses" off the end of the name.
3097 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3099 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3100 (without spaces) instead of just copying the configuration text.
3102 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3104 PH/11 Added $max_received_linelength.
3106 PH/12 Added +ignore_defer and +include_defer to host lists.
3108 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3109 way in which PCRE > 7.0 is built.
3111 PH/14 Implemented queue_only_load_latch.
3113 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3114 MAIL command. The effect was to mangle the value on 64-bit systems.
3116 PH/16 Another patch from the Sieve maintainer.
3118 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3120 PH/18 If a system quota error occurred while trying to create the file for
3121 a maildir delivery, the message "Mailbox is full" was not appended to the
3122 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3123 only to a quota excession during the actual writing of the file.
3125 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3126 characters?) which causes problems in log lines. The DN values are now
3127 passed through string_printing() before being added to log lines.
3129 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3130 and InterBase are left for another time.)
3132 PH/21 Added message_body_newlines option.
3134 PH/22 Guard against possible overflow in moan_check_errorcopy().
3136 PH/23 POSIX allows open() to be a macro; guard against that.
3138 PH/24 If the recipient of an error message contained an @ in the local part
3139 (suitably quoted, of course), incorrect values were put in $domain and
3140 $local_part during the evaluation of errors_copy.
3146 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3147 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3150 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3151 issue a MAIL command.
3153 PH/02 In an ACL statement such as
3155 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3157 if a client was not listed at all, or was listed with a value other than
3158 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3159 the condition was not true (as it should be), so access was not denied.
3160 The bug was that the ! inversion was incorrectly passed on to the second
3161 item. This has been fixed.
3163 PH/03 Added additional dnslists conditions == and =& which are different from
3164 = and & when the dns lookup returns more than one IP address.
3166 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3167 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3169 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3170 FSYNC, which compiles an option called disable_fsync that allows for
3171 bypassing fsync(). The documentation is heavily laced with warnings.
3173 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3175 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3176 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3177 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3178 including adding "make clean"; (3) Added -fPIC when compiling the test
3179 dynamically loaded module, to get rid of a warning.
3181 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3182 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3183 = 0s. The bug is otherwise harmless.
3185 PH/07 There was a bug in the dovecot authenticator such that the value of
3186 $auth1 could be overwritten, and so not correctly preserved, after a
3187 successful authentication. This usually meant that the value preserved by
3188 the server_setid option was incorrect.
3190 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3192 PH/09 Installed PCRE release 7.0.
3194 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3195 run for batched SMTP input. It is now run at the start of every message
3196 in the batch. While fixing this I discovered that the process information
3197 (output by running exiwhat) was not always getting set for -bs and -bS
3198 input. This is fixed, and it now also says "batched" for BSMTP.
3200 PH/11 Added control=no_pipelining.
3202 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3203 patch, slightly modified), and move the expansion of helo_data till after
3204 the connection is made in the smtp transport (so it can use these
3207 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3209 PH/14 Added log_selector = +pid.
3211 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3213 PH/16 Add ${if forany and ${if forall.
3215 PH/17 Added dsn_from option to vary the From: line in DSNs.
3217 PH/18 Flush SMTP output before performing a callout, unless control =
3218 no_callout_flush is set.
3220 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3221 was true (the default) a successful delivery failed to delete the retry
3222 item, thus causing premature timeout of the address. The bug is now
3225 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3227 PH/21 Long custom messages for fakedefer and fakereject are now split up
3228 into multiline responses in the same way that messages for "deny" and
3229 other ACL rejections are.
3231 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3232 with slight modification.
3234 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3235 draft, changing the syntax and factoring some duplicate code".
3237 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3238 for deliveries of the second and subsequent messages over the same SMTP
3241 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3242 ${reduce, with only minor "tidies".
3244 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3246 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3247 expansion side effects.
3249 PH/27 When a message times out after an over-quota error from an Exim-imposed
3250 quota, the bounce message says "mailbox is full". This message was not
3251 being given when it was a system quota that was exceeded. It now should
3254 MH/03 Made $recipients available in local_scan(). local_scan() already has
3255 better access to the recipient list through recipients_list[], but
3256 $recipients can be useful in postmaster-provided expansion strings.
3258 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3259 in the case of a MAIL command with additional options following the
3260 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3261 were accidentally chopped off.
3263 PH/29 SMTP synchronization checks are implemented when a command is read -
3264 there is a check that no more input is waiting when there shouldn't be
3265 any. However, for some commands, a delay in an ACL can mean that it is
3266 some time before the response is written. In this time, more input might
3267 arrive, invalidly. So now there are extra checks after an ACL has run for
3268 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3269 pipelining has not been advertised.
3271 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3273 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3274 returned in the SMTP response when smtp_return_error_details was false.
3275 This has been fixed.
3277 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3278 instead of the C I/O that was originally supplied, because problems were
3279 reported on Solaris.
3281 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3282 Exim which did not show up earlier: it was assuming that a call to
3283 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3284 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3285 was a macro that became an assignment, so it seemed to work. This has
3286 changed to a proper function call with a void return, hence the compile
3287 error. Exim's code has been fixed.
3289 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3292 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3294 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3296 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3297 because it turns out to be too big or there is a timeout) there is no
3298 "Completed" line in the log. When some messages of this type were
3299 selected by exigrep, they were listed as "not completed". Others were
3300 picked up by some special patterns. I have improved the selection
3301 criteria to be more general.
3303 PH/38 The host_find_failed option in the manualroute router can now be set
3304 to "ignore", to completely ignore a host whose IP address cannot be
3305 found. If all hosts are ignored, the behaviour is controlled by the new
3306 host_all_ignored option.
3308 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3309 homing or because of multiple MX records with /mx) generated more than
3310 one IP address, and the following item turned out to be the local host,
3311 all the secondary addresses of the first item were incorrectly removed
3312 from the list, along with the local host and any following hosts (which
3313 is what is supposed to happen).
3315 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3316 whoever called Exim into the -H file. In the case of the daemon it was
3317 behaving confusingly. When first started, it used values for whoever
3318 started the daemon, but after a SIGHUP it used the Exim user (because it
3319 calls itself on a restart). I have changed the code so that it now always
3322 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3323 message are rejected with the same error (e.g. no authentication or bad
3324 sender address), and a DATA command is nevertheless sent (as can happen
3325 with PIPELINING or a stupid MUA), the error message that was given to the
3326 RCPT commands is included in the rejection of the DATA command. This is
3327 intended to be helpful for MUAs that show only the final error to their
3330 PH/42 Another patch from the Sieve maintainer.
3332 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3333 Eximstats - Fixed some broken HTML links and added missing column headers
3335 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3336 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3338 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3340 PH/43 Yet another patch from the Sieve maintainer.
3342 PH/44 I found a way to check for a TCP/IP connection going away before sending
3343 the response to the final '.' that terminates a message, but only in the
3344 case where the client has not sent further data following the '.'
3345 (unfortunately, this is allowed). However, in many cases there won't be
3346 any further data because there won't be any more messages to send. A call
3347 to select() can be used: if it shows that the input is "ready", there is
3348 either input waiting, or the socket has been closed. An attempt to read
3349 the next input character can distinguish the two cases. Previously, Exim
3350 would have sent an OK response which the client would never have see.
3351 This could lead to message repetition. This fix should cure that, at
3352 least in a lot of common cases.
3354 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3355 advertised in response to EHLO.
3361 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3362 fixed by 4.65/MH/01 (is this a record?) are fixed:
3364 (i) An empty string was always treated as zero by the numeric comparison
3365 operators. This behaviour has been restored.
3367 (ii) It is documented that the numeric comparison operators always treat
3368 their arguments as decimal numbers. This was broken in that numbers
3369 starting with 0 were being interpreted as octal.
3371 While fixing these problems I realized that there was another issue that
3372 hadn't been noticed. Values of message_size_limit (both the global option
3373 and the transport option) were treated as octal if they started with 0.
3374 The documentation was vague. These values are now always treated as
3375 decimal, and I will make that clear in the documentation.
3381 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3382 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3385 MH/01 Don't check that the operands of numeric comparison operators are
3386 integers when their expansion is in "skipping" mode (fixes bug
3387 introduced by 4.64-PH/07).
3389 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3390 child addresses, Exim now panics and dies. Previously, because the count
3391 is held in a short int, deliveries were likely to be lost. As such a
3392 large number of recipients for a single message is ridiculous
3393 (performance will be very, very poor), I have chosen to impose a limit
3394 rather than extend the field.
3400 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3401 leftover -K file (the existence of which was triggered by #402).
3402 While we were at it, introduced process PID as part of the -K
3403 filename. This should rule out race conditions when creating
3406 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3407 processing considerably. Previous code took too long for large mails,
3408 triggering a timeout which in turn triggers #401.
3410 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3411 in the DK code in transports.c. sendfile() is not really portable,
3412 hence the _LINUX specificness.
3414 TF/01 In the add_headers option to the mail command in an Exim filter,
3415 there was a bug that Exim would claim a syntax error in any
3416 header after the first one which had an odd number of characters
3419 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3420 callout verification, Exim cached a "reject" for the entire domain. This
3421 is correct for most verifications, but it is not correct for a recipient
3422 verification with use_sender or use_postmaster set, because in that case
3423 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3424 case of MAIL FROM:<> rejection from other early rejections (e.g.
3425 rejection of HELO). When verifying a recipient using a non-null MAIL
3426 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3427 Whatever the result of the callout, the value of the domain cache is
3428 left unchanged (for any other kind of callout, getting as far as trying
3429 RCPT means that the domain itself is ok).
3431 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3434 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3435 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3436 session, the daemon ignores ECONNECT errors and logs others; it now
3437 ignores EPIPE as well.
3439 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3440 (quoted-printable decoding).
3442 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3443 later the small subsequent patch to fix an introduced bug.
3445 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3447 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3449 PH/08 An error is now given if message_size_limit is specified negative.
3451 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3452 to be given (somewhat) arbitrary names.
3454 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3457 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3458 miscellaneous code fixes
3460 PH/10 Added the log_reject_target ACL modifier to specify where to log
3463 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3464 hostname. This is wrong, because it relates to the incoming message (and
3465 probably the interface on which it is arriving) and not to the outgoing
3466 callout (which could be using a different interface). This has been
3467 changed to use the value of the helo_data option from the smtp transport
3468 instead - this is what is used when a message is actually being sent. If
3469 there is no remote transport (possible with a router that sets up host
3470 addresses), $smtp_active_hostname is used.
3472 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3473 tweaks were necessary in order to get it to work (see also 21 below):
3474 (a) The code assumed that strncpy() returns a negative number on buffer
3475 overflow, which isn't the case. Replaced with Exim's string_format()
3477 (b) There were several signed/unsigned issues. I just did the minimum
3478 hacking in of casts. There is scope for a larger refactoring.
3479 (c) The code used strcasecmp() which is not a standard C function.
3480 Replaced with Exim's strcmpic() function.
3481 (d) The code set only $1; it now sets $auth1 as well.
3482 (e) A simple test gave the error "authentication client didn't specify
3483 service in request". It would seem that Dovecot has changed its
3484 interface. Fortunately there's a specification; I followed it and
3485 changed what the client sends and it appears to be working now.
3487 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3490 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3491 address A is aliased to B and C, where B exists and C does not. Without
3492 -v the output is "A verified" because verification stops after a
3493 successful redirection if more than one address is generated. However,
3494 with -v the child addresses are also verified. Exim was outputting "A
3495 failed to verify" and then showing the successful verification for C,
3496 with its parentage. It now outputs "B failed to verify", showing B's
3497 parentage before showing the successful verification of C.
3499 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3500 look up a TXT record in a specific list after matching in a combined
3503 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3504 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3505 they consult the DNS. I had assumed they would set it the way they
3506 wanted; and indeed my experiments on Linux seem to show that in some
3507 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3508 To be on the safe side, however, I have now made the interface to
3509 host_find_byname() similar to host_find_bydns(), with an argument
3510 containing the DNS resolver options. The host_find_byname() function now
3511 sets these options at its start, just as host_find_bydns() does. The smtp
3512 transport options dns_qualify_single and dns_search_parents are passed to
3513 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3514 of host_find_byname() use the default settings of RES_DEFNAMES
3515 (qualify_single) but not RES_DNSRCH (search_parents).
3517 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3518 spool_read_header() do less string testing, by means of a preliminary
3519 switch on the second character of optional "-foo" lines. (This is
3520 overdue, caused by the large number of possibilities that now exist.
3521 Originally there were few.) While I was there, I also converted the
3522 str(n)cmp tests so they don't re-test the leading "-" and the first
3523 character, in the hope this might squeeze out yet more improvement.
3525 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3526 flag allowing group syntax was set by the header_syntax check but not
3527 turned off, possible causing trouble later; (2) The flag was not being
3528 set at all for the header_verify test, causing "group"-style headers to
3529 be rejected. I have now set it in this case, and also caused header_
3530 verify to ignore an empty address taken from a group. While doing this, I
3531 came across some other cases where the code for allowing group syntax
3532 while scanning a header line wasn't quite right (mostly, not resetting
3533 the flag correctly in the right place). These bugs could have caused
3534 trouble for malformed header lines. I hope it is now all correct.
3536 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3537 with the "reply" argument non-NULL. The code, however (which originally
3538 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3539 but it didn't always do it. This confused somebody who was copying the
3540 code for some other use. I have removed all the tests.
3542 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3543 feature that was used to support insecure browsers during the U.S. crypto
3544 embargo. It requires special client support, and Exim is probably the
3545 only MTA that supported it -- and would never use it because real RSA is
3546 always available. This code has been removed, because it had the bad
3547 effect of slowing Exim down by computing (never used) parameters for the
3548 RSA_EXPORT functionality.
3550 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3551 authenticator to fail if there's a tab character in the incoming data
3552 (there should never be unless someone is messing about, as it's supposed
3553 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3554 if the connection is using TLS or if the remote IP is the same as the
3555 local IP, and the "valid-client-cert option" if a client certificate has
3558 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3559 authenticators. This can be used for authorization after authentication
3560 succeeds. (In the case of plaintext, it servers for both authentication
3563 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3564 if any retry times were supplied.
3566 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3567 connection, where there is no client IP address to check. In this
3568 situation, the verify now always succeeds.
3570 PH/25 Applied John Jetmore's -Mset patch.
3572 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3574 PH/27 In a string expansion for a processed (not raw) header when multiple
3575 headers of the same name were present, leading whitespace was being
3576 removed from all of them, but trailing whitespace was being removed only
3577 from the last one. Now trailing whitespace is removed from each header
3578 before concatenation. Completely empty headers in a concatenation (as
3579 before) are ignored.
3581 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3582 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3584 PH/29 [Removed. This was a change that I later backed out, and forgot to
3585 correct the ChangeLog entry (that I had efficiently created) before
3586 committing the later change.]
3588 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3589 address errors (4xx response to RCPT) over the same connection as other
3590 messages routed to the same hosts. Such deliveries are always "forced",
3591 so retry times are not inspected. This resulted in far too many retries
3592 for the affected addresses. The effect occurred only when there were more
3593 hosts than the hosts_max_try setting in the smtp transport when it had
3594 the 4xx errors. Those hosts that it had tried were not added to the list
3595 of hosts for which the message was waiting, so if all were tried, there
3596 was no problem. Two fixes have been applied:
3598 (i) If there are any address or message errors in an SMTP delivery, none
3599 of the hosts (tried or untried) are now added to the list of hosts
3600 for which the message is waiting, so the message should not be a
3601 candidate for sending over the same connection that was used for a
3602 successful delivery of some other message. This seems entirely
3603 reasonable: after all the message is NOT "waiting for some host".
3604 This is so "obvious" that I'm not sure why it wasn't done
3605 previously. Hope I haven't missed anything, but it can't do any
3606 harm, as the worst effect is to miss an optimization.
3608 (ii) If, despite (i), such a delivery is accidentally attempted, the
3609 routing retry time is respected, so at least it doesn't keep
3610 hammering the server.
3612 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3613 in ${readsocket because some servers need this prod.
3615 PH/32 Added some extra debug output when updating a wait-xxx database.
3617 PH/33 The hint "could be header name not terminated by colon", which has been
3618 given for certain expansion errors for a long time, was not being given
3619 for the ${if def:h_colon_omitted{... case.
3621 PH/34 The spec says: "With one important exception, whenever a domain list is
3622 being scanned, $domain contains the subject domain." There was at least
3623 one case where this was not true.
3625 PH/35 The error "getsockname() failed: connection reset by peer" was being
3626 written to the panic log as well as the main log, but it isn't really
3627 panic-worthy as it just means the connection died rather early on. I have
3628 removed the panic log writing for the ECONNRESET error when getsockname()
3631 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3632 runs only) independently of the message's sender address. This meant
3633 that, if the 4xx error was in fact related to the sender, a different
3634 message to the same recipient with a different sender could confuse
3635 things. In particular, this can happen when sending to a greylisting
3636 server, but other circumstances could also provoke similar problems.
3637 I have changed the default so that the retry time for these errors is now
3638 based a combination of the sender and recipient addresses. This change
3639 can be overridden by setting address_retry_include_sender=false in the
3642 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3643 remote server are returned as part of bounce messages. This was not
3644 happening for LMTP over a pipe (the lmtp transport), but now it is the
3645 same for both kinds of LMTP.
3647 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3648 in header lines that were in fact CNAMEs. This is no longer the case.
3650 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3651 and queue runs started by the daemon processed all messages. This has
3652 been fixed so that -R and -S can now usefully be given with -q<time>.
3654 PH/40 Import PCRE release 6.7 (fixes some bugs).
3656 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3658 PH/42 Give an error if -q is specified more than once.
3660 PH/43 Renamed the variables $interface_address and $interface_port as
3661 $received_ip_address and $received_port, to make it clear that these
3662 values apply to message reception, and not to the outgoing interface when
3663 a message is delivered. (The old names remain recognized, of course.)
3665 PH/44 There was no timeout on the connect() call when using a Unix domain
3666 socket in the ${readsocket expansion. There now is.
3668 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3669 be meaningful with "accept".
3671 SC/01 Eximstats V1.43
3672 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3674 SC/02 Eximstats V1.44
3675 Use a glob alias rather than an array ref in the generated
3676 parser. This improves both readability and performance.
3678 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3679 Collect SpamAssassin and rejection statistics.
3680 Don't display local sender or destination tables unless
3681 there is data to show.
3682 Added average volumes into the top table text output.
3684 SC/04 Eximstats V1.46
3685 Collect data on the number of addresses (recipients)
3686 as well as the number of messages.
3688 SC/05 Eximstats V1.47
3689 Added 'Message too big' to the list of mail rejection
3690 reasons (thanks to Marco Gaiarin).
3692 SC/06 Eximstats V1.48
3693 Mainlog lines which have GMT offsets and are too short to
3694 have a flag are now skipped.
3696 SC/07 Eximstats V1.49 (Alain Williams)
3697 Added the -emptyok flag.
3699 SC/08 Eximstats V1.50
3700 Fixes for obtaining the IP address from reject messages.
3702 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3703 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3704 whitespace changes from 4.64-PH/27
3706 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3709 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3710 are found, allow negative numbers in numeric criteria)
3712 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3714 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3715 to match changes made in 4.64-PH/43
3717 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3719 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3720 "domain" is actually an IP address, and force a failure. This locks out
3721 those revolvers/nameservers that support "A-for-A" lookups, in
3722 contravention of the specifications.
3724 PH/48 When a host name was looked up from an IP address, and the subsequent
3725 forward lookup of the name timed out, the host name was left in
3726 $sender_host_name, contrary to the specification.
3728 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3729 restricted to single-key lookups, Exim was not diagnosing an error if
3730 * or *@ was used with a query-style lookup.
3732 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3734 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3735 long ago, but noone interested enough thought of it. Let's just say that
3736 the "1.1" means that there are some new functions that weren't there at
3737 some point in the past.
3739 PH/51 Error processing for expansion failure of helo_data from an smtp
3740 transport during callout processing was broken.
3742 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3743 tested/used via the -bh/-bhc/-bs options.
3745 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3746 bug, fixed in subsequent PCRE releases).
3748 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3749 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3751 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3757 SC/01 Use a glob alias rather than an array ref in eximstats generated
3758 parser. This improves both readability and performance.
3760 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3761 Don't display local sender or destination tables in eximstats unless
3762 there is data to show.
3763 Added average volumes into the eximstats top table text output.
3765 SC/03 Collect data on the number of addresses (recipients) as well
3766 as the number of messages in eximstats.
3768 TF/01 Correct an error in the documentation for the redirect router. Exim
3769 does (usually) call initgroups() when daemonizing.
3771 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3772 with consistent privilege compared to when running as a daemon.
3774 TF/03 Note in the spec that $authenticated_id is not set for local
3775 submissions from trusted users.
3777 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3778 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3780 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3781 by adding some example configuration directives to the default
3782 configuration file. A little bit of work is required to uncomment the
3783 directives and define how usernames and passwords are checked, but
3784 there is now a framework to start from.
3786 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3787 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3788 without this. I don't know how relevant this is to other LDAP libraries.
3790 PH/02 Add the verb name to the "unknown ACL verb" error.
3792 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3794 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3796 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3797 directory not expanded when it should be if an expanded home directory
3798 was set for the address (which is overridden by the transport).
3800 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3803 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3804 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3805 because it is too late at that time, and has no effect.
3807 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3808 security issue with \' (bugzilla #107). I could not use the
3809 PQescapeStringConn() function, because it needs a PGconn value as one of
3812 PH/08 When testing addresses using -bt, indicate those final addresses that
3813 are duplicates that would not cause an additional delivery. At least one
3814 person was confused, thinking that -bt output corresponded to deliveries.
3815 (Suppressing duplicates isn't a good idea as you lose the information
3816 about possibly different redirections that led to the duplicates.)
3818 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3819 systems where poll() doesn't work, in particular OS X.
3821 PH/10 Added more information to debugging output for retry time not reached.
3823 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3824 operations in malware.c.
3826 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3829 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3830 syslog_duplication set false, log lines that would normally be written
3831 both the the main log and to the reject log were not written to syslog at
3834 PH/14 In the default configuration, change the use of "message" in ACL warn
3835 statements to "add_header".
3837 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3838 not followed by a command (e.g. "seen endif").
3840 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3841 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3844 PH/17 Added extra conditions to the default value of delay_warning_condition
3848 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3849 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3850 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3853 The Auto-Submitted: and various List- headers are standardised, whereas I
3854 don't think Precedence: ever was.
3856 PH/18 Refactored debugging code in route_finduser() to show more information,
3857 in particular, the error code if getpwnam() issues one.
3859 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3860 This is apparently needed in addition to the PH/07 change above to avoid
3861 any possible encoding problems.
3863 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3864 but not after initializing Perl.
3866 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3867 output them only if debugging. By default they are written stderr,
3868 apparently, which is not desirable.
3870 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3873 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3876 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3878 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3879 authenticated or an ident call has been made. Suppress the default
3880 values for $authenticated_id and $authenticated_sender (but permit -oMai
3881 and -oMas) when testing with -bh.
3883 PH/24 Re-jigged the order of the tests in the default configuration so that the
3884 tests for valid domains and recipients precede the DNS black list and CSA
3885 tests, on the grounds that those ones are more expensive.
3887 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3888 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3889 This bug exists in every version of Exim that I still have, right back to
3892 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3893 However, an attempt to turn on case-sensitivity in a regex key by
3894 including (?-i) didn't work because the subject string was already
3895 lowercased, and the effects were non-intuitive. It turns out that a
3896 one-line patch can be used to allow (?-i) to work as expected.
3902 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3903 other effects) broke the use of negated acl sub-conditions.
3905 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3908 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3909 "Deny" causes Exim to reject the incoming connection with a 554 error.
3910 Unfortunately, if there is a major crisis, such as a disk failure,
3911 tcp-wrappers gives "deny", whereas what one would like would be some
3912 kind of temporary error. A kludge has been added to help with this.
3913 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3914 554 error is used if errno is still zero or contains ENOENT (which occurs
3915 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3918 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3920 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3921 errors. Otherwise a message that provokes a temporary error (when other
3922 messages do not) can cause a whole host to time out.
3924 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3925 addresses were routed directly to files or pipes from a redirect router.
3926 File deliveries just didn't batch; pipe deliveries might have suffered
3929 PH/06 A failure to get a lock for a hints database would erroneously always say
3930 "Failed to get write lock", even when it was really a read lock.
3932 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3933 of 0600. This has been changed to use the value of the lockfile_mode
3934 option (which defaults to 0600).
3936 PH/08 Applied small patch from the Sieve maintainer.
3938 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3939 folder from quota calculations, a direct delivery into this folder messed
3940 up the contents of the maildirsize file. This was because the regex was
3941 used only to exclude .Trash (or whatever) when the size of the mailbox
3942 was calculated. There was no check that a delivery was happening into an
3943 excluded directory. This bug has been fixed by ignoring all quota
3944 processing for deliveries into excluded directories.
3946 PH/10 Added the maildirfolder_create_regex option to appendfile.
3952 PH/01 The code for finding all the local interface addresses on a FreeBSD
3953 system running IPv6 was broken. This may well have applied to all BSD
3954 systems, as well as to others that have similar system calls. The broken
3955 code found IPv4 interfaces correctly, but gave incorrect values for the
3956 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3957 that it would not match correctly against @[] and not recognize the IPv6
3960 PH/02 The ipliteral router was not recognizing addresses of the form user@
3961 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3963 PH/03 Added disable_ipv6.
3965 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3966 decoded form, because it is most often used to construct To: headers
3967 lines in autoreplies, and the decoded form may well be syntactically
3968 invalid. However, $reply_address has leading white space removed, and all
3969 newlines turned into spaces so that the autoreply transport does not
3972 PH/05 If group was specified without a user on a router, and no group or user
3973 was specified on a transport, the group from the router was ignored.
3975 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3976 for visible compile-time settings that can be used to change these
3977 numbers, for those that want even more. Backwards compatibility with old
3978 spool files has been maintained. However, going back to a previous Exim
3979 release will lost any variables that are in spool files.
3981 PH/07 Two small changes when running in the test harness: increase delay when
3982 passing a TCP/IP connection to a new process, in case the original
3983 process has to generate a bounce, and remove special handling of
3984 127.0.0.2 (sic), which is no longer necessary.
3986 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3987 be the same on different OS.
3989 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3992 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3993 whether --show-vars was specified or not
3995 JJ/02 exipick: Added support for new ACL variable spool format introduced
3998 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3999 syntactically invalid From: or Reply-to: line, and a filter used this to
4000 generate an autoreply, and therefore failed to obtain an address for the
4001 autoreply, Exim could try to deliver to a non-existent relative file
4002 name, causing unrelated and misleading errors. What now happens is that
4003 it logs this as a hard delivery error, but does not attempt to create a
4006 PH/11 The exinext utility has a -C option for testing purposes, but although
4007 the given file was scanned by exinext itself; it wasn't being passed on
4008 when Exim was called.
4010 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4011 an end-of-file indication when reading a command response.
4013 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4014 compiled. In many other places in Exim, IPv6 addresses are always
4015 recognized, so I have changed this. It also means that IPv4 domain
4016 literals of the form [IPV4:n.n.n.n] are now always recognized.
4018 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4019 used if the router is not running as root, for example, when verifying at
4020 ACL time, or when using -bh. The debugging output from this situation was
4021 non-existent - all you got was a failure to exec. I have made two
4024 (a) Failures to set uid/gid, the current directory, or a process leader
4025 in a subprocess such as that created by queryprogram now generate
4026 suitable debugging output when -d is set.
4028 (b) The queryprogram router detects when it is not running as root,
4029 outputs suitable debugging information if -d is set, and then runs
4030 the subprocess without attempting to change uid/gid.
4032 PH/15 Minor change to Makefile for building test_host (undocumented testing
4035 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4036 additional section of a DNS packet that returns MX or SRV records.
4037 Instead, it always explicitly searches for A/AAAA records. This avoids
4038 major problems that occur when a DNS server includes only records of one
4039 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4040 fixed another bug: if SRV records were looked up and the corresponding
4041 address records were *not* found in the additional section, the port
4042 values from the SRV records were lost.
4044 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4045 using the correct key (the original address) when searching the retry
4046 rules in order to find which one to use for generating the retry hint.
4048 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4049 adding the default one. Similarly, if it contains a Reply-To: header, the
4050 errors_reply_to option, if set, is not used.
4052 PH/19 When calculating a retry time, Exim used to measure the "time since
4053 failure" by looking at the "first failed" field in the retry record. Now
4054 it does not use this if it is later than than the arrival time of the
4055 message. Instead it uses the arrival time. This makes for better
4056 behaviour in cases where some deliveries succeed, thus re-setting the
4057 "first failed" field. An example is a quota failure for a huge message
4058 when small messages continue to be delivered. Without this change, the
4059 "time since failure" will always be short, possible causing more frequent
4060 delivery attempts for the huge message than are intended.
4061 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4063 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4064 $1, $2, $3) because the numerical variables can be reset during some
4065 expansion items (e.g. "match"), thereby losing the authentication data.
4067 PH/21 Make -bV show the size of off_t variables so that the test suite can
4068 decide whether to run tests for quotas > 2G.
4070 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4071 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4072 filecount value is greater than 2G or if a quota value is greater than 2G
4073 on a system where the size of off_t is not greater than 4, a panic error
4076 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4077 never match. The debug and -bh output now contains an explicit error
4078 message indicating a malformed IPv4 address or mask.
4080 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4081 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4082 PH/23 above applies.
4084 PH/25 Do not write to syslog when running in the test harness. The only
4085 occasion when this arises is a failure to open the main or panic logs
4086 (for which there is an explicit test).
4088 PH/26 Added the /no_tell option to "control=freeze".
4090 PH/27 If a host name lookup failed very early in a connection, for example, if
4091 the IP address matched host_lookup and the reverse lookup yielded a name
4092 that did not have a forward lookup, an error message of the form "no IP
4093 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4094 could be logged. Now it outputs the IP address instead of "NULL".
4096 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4097 allows the sender and the authenticated sender to be set when
4098 submitting a message from within Exim. Since child_open_exim() is
4099 documented for local_scan(), the new function should be too.
4101 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4102 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4103 results in an empty string is now treated as unset.
4105 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4107 PH/31 Added sender_verify_fail logging option.
4109 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4110 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4111 tidied the source and removed it altogether.
4113 PH/33 When a queue run was abandoned because the load average was too high, a
4114 log line was always written; now it is written only if the queue_run log
4115 selector is set. In addition, the log line for abandonment now contains
4116 information about the queue run such as the pid. This is always present
4117 in "start" and "stop" lines but was omitted from the "abandon" line.
4119 PH/34 Omit spaces between a header name and the colon in the error message that
4120 is given when verify = headers_syntax fails (if there are lots of them,
4121 the message gets confusing).
4123 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4124 names, as there are now some PTR records that contain slashes. This check
4125 is only to protect against broken name servers that fall over on strange
4126 characters, so the fact that it applies to all lookups doesn't matter.
4128 PH/36 Now that the new test suite is complete, we can remove some of the
4129 special code in Exim that was needed for the old test suite. For example,
4130 sorting DNS records because real resolvers return them in an arbitrary
4131 order. The new test suite's fake resolver always returns records in the
4134 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4135 bounces) except when queue_only is set, to avoid logging races between
4136 the different processes.
4138 PH/38 Panic-die if .include specifies a non-absolute path.
4140 PH/39 A tweak to the "H" retry rule from its user.
4142 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4143 a label. They prevented compilation on older perls.
4145 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4146 a warning to be raised on newish perls.
4148 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4149 on queue. Changes to match documented behaviour of showing count of
4150 messages matching specified criteria.
4152 PH/40 Changed the default ident timeout from 30s to 5s.
4154 PH/41 Added support for the use of login_cap features, on those BSD systems
4155 that have them, for controlling the resources used by pipe deliveries.
4157 PH/42 The content-scanning code uses fopen() to create files in which to put
4158 message data. Previously it was not paying any attention to the mode of
4159 the files. Exim runs with umask(0) because the rest of the code creates
4160 files with open(), and sets the required mode explicitly. Thus, these
4161 files were ending up world-writeable. This was not a big issue, because,
4162 being within the spool directory, they were not world-accessible. I have
4163 created a function called modefopen, which takes an additional mode
4164 argument. It sets umask(777), creates the file, chmods it to the required
4165 mode, then resets the umask. All the relevant calls to fopen() in the
4166 content scanning code have been changed to use this function.
4168 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4169 to 24 hours. This avoids potential overflow problems when processing G
4170 and H retry rules. I suspect nobody ever tinkers with this value.
4172 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4174 PH/45 When the plaintext authenticator is running as a client, the server's
4175 challenges are checked to ensure they are valid base64 strings. By
4176 default, the authentication attempt is cancelled if an invalid string is
4177 received. Setting client_ignore_invalid_base64 true ignores these errors.
4178 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4179 they are received. Thus, the responses can be made to depend on the
4180 challenges. If an invalid string is ignored, an empty string is placed in
4183 PH/46 Messages that are created by the autoreply transport now contains a
4184 References: header, in accordance with RFCs 2822 and 3834.
4186 PH/47 Added authenticated_sender_force to the smtp transport.
4188 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4190 PH/49 Installed latest patch from the Sieve maintainer.
4192 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4193 was also set, the appendfile transport was unnecessarily scanning a
4194 directory of message files (e.g. for maildir delivery) to find the count
4195 of files (along with the size), even though it did not need this
4196 information. It now does the scan only if it needs to find either the
4197 size of the count of files.
4199 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4201 PH/52 Two bugs concerned with error handling when the smtp transport is
4204 (i) Exim was not creating retry information for temporary errors given
4205 for individual recipients after the DATA command when the smtp transport
4206 was used in LMTP mode. This meant that they could be retried too
4207 frequently, and not timed out correctly.
4209 (ii) Exim was setting the flag that allows error details to be returned
4210 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4211 recipients that were returned after the DATA command.
4213 PH/53 This is related to PH/52, but is more general: for any failing address,
4214 when detailed error information was permitted to be returned to the
4215 sender, but the error was temporary, then after the final timeout, only
4216 "retry timeout exceeded" was returned. Now it returns the full error as
4217 well as "retry timeout exceeded".
4219 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4220 do this, and (what is worse) MTAs that accept it.
4222 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4223 will now be deprecated.
4225 PH/56 New os.c-cygwin from the Cygwin maintainer.
4227 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4228 formats (previously only available in exim formats via -bpr, -bpru,
4229 and -bpra. Now also available in native and exiqgrep formats)
4231 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4232 with very large, slow to parse queues
4234 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4236 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4238 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4239 responses to authentication challenges, though it was showing the
4240 challenges; (ii) I've removed the CR characters from the debug output for
4243 PH/58 Allow for the insertion of a newline as well as a space when a string
4244 is turned into more than one encoded-word during RFC 2047 encoding. The
4245 Sieve code now uses this.
4247 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4248 data_4xx, lost_connection, tls_required.
4250 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4251 message was being sent as an SMTP response.
4253 PH/61 Add -l and -k options to exicyclog.
4255 PH/62 When verifying, if an address was redirected to one new address, so that
4256 verification continued, and the new address failed or deferred after
4257 having set something in $address_data, the value of $address_data was not
4258 passed back to the ACL. This was different to the case when no
4259 redirection occurred. The value is now passed back in both cases.
4261 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4262 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4263 use login_cap.h, so on its own it isn't the distinguishing feature. The
4264 new name refers directly to the setclassresources() function.
4266 PH/65 Added configuration files for NetBSD3.
4268 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4270 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4271 is preferred over IPv4.
4273 PH/68 The bounce_return_message and bounce_return_body options were not being
4274 honoured for bounces generated during the reception of non-SMTP messages.
4275 In particular, this applied to messages rejected by the ACL. This bug has
4276 been fixed. However, if bounce_return_message is true and bounce_return_
4277 body is false, the headers that are returned for a non-SMTP message
4278 include only those that have been read before the error was detected.
4279 (In the case of an ACL rejection, they have all been read.)
4281 PH/69 The HTML version of the specification is now built in a directory called
4282 spec_html instead of spec.html, because the latter looks like a path with
4283 a MIME-type, and this confuses some software.
4285 PH/70 Catch two compiler warnings in sieve.c.
4287 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4288 function verify_get_ident() calls ip_connect() to connect a socket, but
4289 if the "connect()" function timed out, ip_connect() used to close the
4290 socket. However, verify_get_ident() also closes the socket later, and in
4291 between Exim writes to the log, which may get opened at this point. When
4292 the socket was closed in ip_connect(), the log could get the same file
4293 descriptor number as the socket. This naturally causes chaos. The fix is
4294 not to close the socket in ip_connect(); the socket should be closed by
4295 the function that creates it. There was only one place in the code where
4296 this was missing, in the iplookup router, which I don't think anybody now
4297 uses, but I've fixed it anyway.
4299 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4300 well as to direct DNS lookups. Otherwise the handling of names in host
4301 lists is inconsistent and therefore confusing.
4307 PH/01 Two changes to the default runtime configuration:
4309 (1) Move the checks for relay_from_hosts and authenticated clients from
4310 after to before the (commented out) DNS black list checks.
4312 (2) Add control=submission to the relay_from_hosts and authenticated
4313 clients checks, on the grounds that messages accepted by these
4314 statements are most likely to be submissions.
4316 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4318 (1) Generate an error if the third argument for the ${prvs expansion is
4321 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4324 (3) Reset the variables that are obtained from the first argument of
4325 ${prvscheck and used in the second argument before leaving the code,
4326 because their memory is reclaimed, so using them afterwards may do
4329 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4330 one (it's much easier than Tom thought :-).
4332 (5) Because of (4), we can now allow for the use of $prvscheck_result
4333 inside the third argument.
4335 PH/03 For some reason, the default setting of PATH when running a command from
4336 a pipe transport was just "/usr/bin". I have changed it to
4339 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4340 anything to be listed in the output from -bV.
4342 PH/05 When a filter generated an autoreply, the entire To: header line was
4343 quoted in the delivery log line, like this:
4345 => >A.N.Other <ano@some.domain> <original@ddress> ...
4347 This has been changed so that it extracts the operative address. There
4348 may be more than one such address. If so, they are comma-separated, like
4351 => >ano@some.domain,ona@other.domain <original@ddress> ...
4353 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4354 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4355 not being looked up in the rDNS to get a host name, Exim was showing the
4356 IP address twice in Received: lines, even though the IP addresses were
4357 identical. For example:
4359 Received: from [1.2.3.4] (helo=[1.2.3.4])
4361 However, if the real host name was known, it was omitting the HELO data
4362 if it matched the actual IP address. This has been tidied up so that it
4363 doesn't show the same IP address twice.
4365 PH/07 When both +timestamp and +memory debugging was on, the value given by
4366 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4367 called by the debug printing, thereby overwriting the timestamp buffer.
4368 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4370 PH/08 When the original message was included in an autoreply transport, it
4371 always said "this is a copy of the message, including all the headers",
4372 even if body_only or headers_only was set. It now gives an appropriate
4375 PH/09 Applied a patch from the Sieve maintainer which:
4377 o fixes some comments
4378 o adds the (disabled) notify extension core
4379 o adds some debug output for the result of if/elsif tests
4380 o points to the current vacation draft in the documentation
4381 and documents the missing references header update
4385 o fixes a bug in processing the envelope test (when testing
4386 multiple envelope elements, the last element determined the
4389 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4390 Electronic Mail") by including:
4392 Auto-submitted: auto-generated
4394 in the messages that it generates (bounce messages and others, such as
4395 warnings). In the case of bounce messages for non-SMTP messages, there was
4396 also a typo: it was using "Auto_submitted" (underscore instead of
4397 hyphen). Since every message generated by Exim is necessarily in response
4398 to another message, thes have all been changed to:
4400 Auto-Submitted: auto-replied
4402 in accordance with these statements in the RFC:
4404 The auto-replied keyword:
4406 - SHOULD be used on messages sent in direct response to another
4407 message by an automatic process,
4409 - MUST NOT be used on manually-generated messages,
4411 - MAY be used on Delivery Status Notifications (DSNs) and Message
4412 Disposition Notifications (MDNs),
4414 - MUST NOT be used on messages generated by automatic or periodic
4415 processes, except for messages which are automatic responses to
4418 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4419 to the default Received: header definition.
4421 PH/12 Added log selector acl_warn_skipped (default on).
4423 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4424 variables because (a) they are in the wrong storage pool and (b) even if
4425 they were copied, it wouldn't work properly because of the caching.
4427 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4428 checking when decoding. Apparently there are clients that generate
4429 overlong encoded strings. Why am I not surprised?
4431 PH/15 If the first argument of "${if match_address" was not empty, but did not
4432 contain an "@" character, Exim crashed. Now it writes a panic log message
4433 and treats the condition as false.
4435 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4437 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4438 extension "envelope-auth". The code is finished and in agreement with
4439 other implementations, but there is no documentation so far and in fact,
4440 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4441 not changing the active code.
4443 Print executed "if" and "elsif" statements when debugging is used. This
4444 helps a great deal to understand what a filter does.
4446 Document more things not specified clearly in RFC3028. I had all this
4447 sorted out, when out of a sudden new issues came to my mind. Oops."
4449 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4452 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4453 canonical form (as documented). However, after a host name lookup from
4454 the IP address, check_host() was doing a simple string comparison with
4455 addresses acquired from the DNS when checking that the found name did
4456 have the original IP as one of its addresses. Since any found IPv6
4457 addresses are likely to be in abbreviated form, the comparison could
4458 fail. Luckily, there already exists a function for doing the comparison
4459 by converting both addresses to binary, so now that is used instead of
4460 the text comparison.
4462 PH/20 There was another similar case to PH/19, when a complete host name was
4463 given in a host list; looking up its IP address could give an abbreviated
4464 form, whereas the current host's name might or might not be abbreviated.
4465 The same fix has been applied.
4471 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4472 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4475 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4476 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4478 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4480 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4481 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4482 Also, for "Auto-Submitted", treat anything other than "no" as
4483 non-personal, in accordance with RFC 3834. (Previously it treated
4484 anything starting "auto-" as non-personal.)
4486 TF/01 The control=submission/name=... option had a problem with syntax
4487 errors if the name included a slash character. The /name= option
4488 now slurps the rest of the string, so it can include any characters
4489 but it must come last in the list of options (after /sender_retain
4492 PH/05 Some modifications to the interface to the fake nameserver for the new
4500 TK/01 Added the "success_on_redirect" address verification option. See
4501 NewStuff for rationale and an example.
4503 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4505 PH/02 Patch to exigrep to allow it to work on syslog lines.
4507 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4508 fread() to skip over the body file's header line, because in Cygwin the
4509 header line is locked and is inaccessible.
4511 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4512 co-exist for some time) to make it clear that it is the Exim ID that is
4513 referenced, not the Message-ID: header line.
4515 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4516 string_format() function, because snprintf() does not exist on all
4519 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4520 ${stat: expansion item.
4522 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4523 protocol synchronization error", to keep the pedants happy.
4525 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4526 well as for IRIX systems, when gcc is being used. See the host.c source
4529 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4531 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4534 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4535 transport and to the smtp transport in LMTP mode.
4537 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4539 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4540 run a filter in a subprocess. This could lead to confusion in subsequent
4541 lookups in the parent process. There should also be a search_tidyup() at
4542 the end of the subprocess.
4544 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4545 only if the host matched helo_try_verify_hosts, which caused the
4546 verification to occur when the EHLO/HELO command was issued. The ACL just
4547 tested the remembered result. Now, if a previous verification attempt has
4548 not happened, "verify = helo" does it there and then.
4550 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4552 TK/03 Fix log output including CR from clamd.
4554 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4555 exist provoked a memory error which could cause a segfault.
4557 PH/15 Installed PCRE 6.2
4559 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4561 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4562 of the problem. Specifically, suggested +O2 rather than +O1 for the
4565 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4567 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4568 record, the port was not correctly logged when the outgoing_port log
4569 selector was set (it logged the transort's default port).
4571 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4572 fallback_hosts, and "hosts" in the smtp transport.
4574 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4575 host errors such as "Connection refused".
4577 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4578 authentication with radiusclient 0.4.9:
4580 - Error returned from rc_read_config was caught wrongly
4581 - Username/password not passed on to radius server due to wrong length.
4583 The presumption is that some radiusclient API changes for 4.51/PH/17
4584 were not taken care of correctly. The code is still untested by me (my
4585 Linux distribution still has 0.3.2 of radiusclient), but it was
4586 contributed by a Radius user.
4588 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4589 expanding the "port" option of the smtp transport.
4591 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4592 while reading a MIME header. Thanks to Tom Hughes for a patch.
4594 PH/24 Include config.h inside local_scan.h so that configuration settings are
4597 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4598 that in an ACL for RCPT (for example), you can examine exactly what was
4601 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4602 commands, but it was not correctly comparing the address with the actual
4603 client host address. Thus, it would show the EHLO address in Received:
4604 header lines when this was not necessary.
4606 PH/27 Added the % operator to ${eval:}.
4608 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4609 it should be ignoring failures (because with -C, for example, it has lost
4610 privilege). It wasn't ignoring creation failures other than "already
4613 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4616 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4617 because an input line was too long, either on its own, or by virtue of
4618 too many continuations, the temporary file was not being removed, and the
4619 return code was incorrect.
4621 PH/31 Missing "BOOL" in function definition in filtertest.c.
4623 PH/32 Applied Sieve patches from the maintainer.
4625 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4627 PH/33 Added "verify = not_blind".
4629 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4630 Local/Makefile (with some defaults set). These are used in built scripts
4631 such as exicyclog, but they have never been used in the exim_install
4632 script (though there are many overriding facilities there). I have
4633 arranged that the exim_install script now takes note of these two
4636 PH/35 Installed configuration files for Dragonfly.
4638 PH/36 When a locally submitted message by a trusted user did not contain a
4639 From: header, and the sender address was obtained from -f or from an SMTP
4640 MAIL command, and the trusted user did not use -F to supply a sender
4641 name, $originator_name was incorrectly used when constructing a From:
4642 header. Furthermore, $originator_name was used for submission mode
4643 messages from external hosts without From: headers in a similar way,
4644 which is clearly wrong.
4646 PH/37 Added control=suppress_local_fixups.
4648 PH/38 When log_selector = +received_sender was set, and the addition of the
4649 sender made the log line's construction buffer exactly full, or one byte
4650 less than full, an overflow happened when the terminating "\n" was
4653 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4654 when the result of a list match is failure because a DNS lookup failed.
4656 PH/40 RM_COMMAND is now used in the building process.
4658 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4659 the "build-* directories that it finds.
4661 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4662 address in a domain literal was a prefix of an interface address.
4664 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4665 when verifying a sender address, unless rewrite_headers is false.
4667 PH/44 Wrote a long comment about why errors_to addresses are verified as
4668 recipients, not senders.
4670 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4671 the ratelimit ACL was added.
4673 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4675 PH/46 Added extra information about PostgreSQL errors to the error string.
4677 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4678 avoiding the need to install special zones in a real server. This is
4679 backwards compatible; if it can't find the fake resolver, it drops back.
4680 Thus, both old and new test suites can be run.
4682 TF/02 Added util/ratelimit.pl
4684 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4685 clock is set back in time.
4687 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4688 Candler <B.Candler@pobox.com>.
4690 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4691 OK for addresses that are the result of redirections.
4693 PH/48 A number of further additions for the benefit of the new test suite,
4694 including a fake gethostbyname() that interfaces to the fake DNS resolver
4697 TF/06 The fix for widen_domains has also been applied to qualify_single and
4698 search_parents which are the other dnslookup options that can cause
4701 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4704 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4706 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4707 service" if it encountered an MX record with an empty target hostname.
4708 The message is now "an MX or SRV record indicated no SMTP service".
4710 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4711 if the DNS of the sending site is misconfigured. This is quite a
4712 common situation. This change restores the behaviour of treating a
4713 helo verification defer as a failure.
4715 PH/51 If self=fail was set on a router, the bounce message did not include the
4716 actual error message.
4722 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4724 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4725 command itself ended in error, the underlying message about the transport
4726 filter timeout was being overwritten with the pipe command error. Now the
4727 underlying error message should be appended to the second error message.
4729 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4731 PH/02 Reduce the amount of output that "make" produces by default. Full output
4732 can still be requested.
4734 PH/03 The warning log line about a condition test deferring for a "warn" verb
4735 was being output only once per connection, rather than after each
4736 occurrence (because it was using the same function as for successful
4737 "warn" verbs). This seems wrong, so I have changed it.
4739 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4740 it should not have, which might have caused a crash in the right
4741 circumstances, but probably never did.
4743 PH/04 Installed a modified version of Tony Finch's patch to make submission
4744 mode fix the return path as well as the Sender: header line, and to
4745 add a /name= option so that you can make the user's friendly name appear
4748 TF/03 Added the control = fakedefer ACL modifier.
4750 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4751 Mark Lowes for thorough testing.
4753 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4755 TK/03 Merged latest SRS patch from Miles Wilton.
4757 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4758 with the definition in sysexits.h (which is #included earlier).
4759 Fortunately, Exim does not actually use EX_OK. The code used to try to
4760 preserve the sysexits.h value, by assuming that macro definitions were
4761 scanned for macro replacements. I have been disabused of this notion,
4762 so now the code just undefines EX_OK before #including unistd.h.
4764 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4765 in the smtp transport. When a block could not be written in a single
4766 write() function, the timeout was being re-applied to each part-write.
4767 This seems wrong - if the receiver was accepting one byte at a time it
4768 would take for ever. The timeout is now adjusted when this happens. It
4769 doesn't have to be particularly precise.
4771 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4772 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4774 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4775 without a domain if the check to <postmaster@domain> fails.
4777 SC/01 Eximstats: added -xls and the ability to specify output files
4778 (patch written by Frank Heydlauf).
4780 SC/02 Eximstats: use FileHandles for outputting results.
4782 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4784 SC/04 Eximstats: fixed display of large numbers with -nvr option
4786 SC/05 Eximstats: fixed merging of reports with empty tables.
4788 SC/06 Eximstats: added the -include_original_destination flag
4790 SC/07 Eximstats: removed tabs and trailing whitespace.
4792 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4794 TK/06 MBOX spool code: Add real "From " MBOX separator line
4795 so the .eml file is really in mbox format (even though
4796 most programs do not really care). Patch from Alex Miller.
4798 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4799 The latter is generated from $received_to and is only set if the
4800 message has one envelope recipient. SA can use these headers,
4801 obviously out-of-the-box. Patch from Alex Miller.
4803 PH/08 The ${def test on a variable was returning false if the variable's
4804 value was "0", contrary to what the specification has always said!
4805 The result should be true unless the variable is empty.
4807 PH/09 The syntax error of a character other than { following "${if
4808 def:variable_name" (after optional whitespace) was not being diagnosed.
4809 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4810 accidental colon was present, for example, could give incorrect results.
4812 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4813 result is used (not including appendfile, where other changes are about
4816 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4817 This involved changing a lot of size variables from int to off_t. It
4818 should work with maildirs and everything.
4820 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4821 spamd dying while we are connected to it.
4823 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4826 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4827 function for BDB 4.3.
4829 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4831 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4832 the sources for PCRE have been re-arranged and more files are now
4835 PH/15 The code I had for printing potentially long long variables in PH/11
4836 above was not the best (it lost precision). The length of off_t variables
4837 is now inspected at build time, and an appropriate printing format (%ld
4838 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4839 to be "long long int" or "long int". This is needed for the internal
4840 formatting function string_vformat().
4842 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4843 the configuration file to be ":syslog", then the script "guesses" where
4844 the logs files are, rather than using the compiled in default. In our
4845 case the guess is not the same as the compiled default, so the script
4846 suddenly stopped working when I started to use syslog. The patch checks
4847 to see if log_file_path is "". If so, it attempts to read it from exim
4848 with no configuration file to get the compiled in version, before it
4849 falls back to the previous guessing code."
4851 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4852 implementing BATV in an Exim configuration. See NewStuff for the gory
4855 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4856 Makefile that are specific to HP-UX.
4858 PH/18 If the "use_postmaster" option was set for a recipient callout together
4859 with the "random" option, the postmaster address was used as the MAIL
4860 FROM address for the random test, but not for the subsequent recipient
4861 test. It is now used for both.
4863 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4864 patch removes a few documentation additions to RFC 3028, because the
4865 latest draft now contains them. It adds the new en;ascii-case comparator
4866 and a new error check for 8bit text in MIME parts. Comparator and
4867 require names are now matched exactly. I enabled the subaddress
4868 extension, but it is not well tested yet (read: it works for me)."
4870 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4871 rework some of the code of TK/09 above to avoid the hardwired use of
4872 "%lld" and "long long". Replaced the call to snprintf() with a call to
4875 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4876 records point to non-existent hosts", "retry timeout exceeded", and
4877 "retry time not reached for any host after a long failure period".
4879 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4880 experimental DomainKeys support:
4882 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4883 (2) On an error such as an illegally used "control", the wrong name for
4884 the control was given.
4886 These problems did NOT occur unless DomainKeys support was compiled.
4888 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4890 PH/24 Added ${if match_ip condition.
4892 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4893 databases so that it will be absolutely obvious if a crash occurs in the
4894 DB library. This is a regular occurrence (often caused by mis-matched
4897 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4898 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4899 picked up on a user's system that detects such things. There doesn't seem
4900 to be a gcc warning option for this - only an attribute that has to be
4901 put on the function's prototype. It seems that in Fedora Core 4 they have
4902 set this on a number of new functions. No doubt there will be more in due
4905 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4906 specify a transport. However, if an address that was verified by such a
4907 router was the subject of a callout, Exim crashed because it tried to
4908 read the rcpt_include_affixes from the non-existent transport. Now it
4909 just assumes that the setting of that option is false. This bug was
4910 introduced by 4.51/PH/31.
4912 PH/28 Changed -d+all to exclude +memory, because that information is very
4913 rarely of interest, but it makes the output a lot bigger. People tend to
4914 do -d+all out of habit.
4916 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4917 code in os-type was giving problems when libc.so lives in lib64, like on
4920 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4921 aren't the modern standard, and it seems that some systems' include files
4922 don't always have them. Exim was already checking for some of the newer
4923 ones like T_AAAA, and defining it itself. I've added checks for all the
4924 record types that Exim uses.
4926 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4927 not automatically generating a new one, as it is supposed to. This
4928 prevented TLS from working. If the file did exist, but contained invalid
4929 data, a new version was generated, as expected. It was only the case of a
4930 non-existent file that was broken.
4932 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4933 with a change in libdomainkeys > 0.64.
4935 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4936 from DNS. If the selector record carries the flag, it now has
4937 precedence over the domain-wide flag.
4939 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4941 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4942 the use of a port name that isn't defined in /etc/services) occurred, the
4943 message was deferred as in a normal delivery, and thus remained on the
4944 spool, instead of being failed because of the mua_wrapper setting. This
4945 is now fixed, and I tidied up some of the mua_wrapper messages at the
4948 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4949 the messages in a hash of arrays rather than using individual hashes.
4950 This is a bit cleaner and results in dramatic memory savings, albeit
4951 at a slight CPU cost.
4953 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4954 as requested by Marc Sherman.
4956 SC/10 Eximstats: added histograms for user specified patterns as requested
4959 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4961 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4962 fopen() in the content-scanning modules that did not already have it.
4968 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4969 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4971 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4973 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4975 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4976 to test Sieve filters that use "vacation".
4978 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4979 that changes the way the GnuTLS parameters are stored in the cache file.
4980 The new format can be generated externally. For backward compatibility,
4981 if the data in the cache doesn't make sense, Exim assumes it has read an
4982 old-format file, and it generates new data and writes a new file. This
4983 means that you can't go back to an older release without removing the
4986 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4987 work if there are any delivery delays because "one_time" forces the
4988 parent to be marked "delivered", so its unseen clone is never tried
4989 again. For this reason, Exim now forbids the simultaneous setting of
4992 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4993 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4994 entry if you want to know the details. The fix, however, neglected to
4995 consider the case when local delivery batching is involved. The test for
4996 "previously delivered" was not happening when checking to see if an
4997 address could be batched with a previous (undelivered) one; under
4998 certain circumstances this could lead to multiple deliveries to the same
5001 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5002 in its include files, and this causes problems building Exim.
5004 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5005 header_syntax) but Exim was just ignoring anything given after a slash.
5006 In particular, this caused confusion with an attempt to use "verify =
5007 reverse_host_lookup/defer_ok". An error is now given when options are
5008 supplied for verify items that do not have them. (Maybe reverse_host_
5009 lookup should have a defer_ok option, but that's a different point.)
5011 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5012 defined by RFC 821) to 2048, because there were problems with some AUTH
5013 commands, and RFC 1869 says the size should be increased for extended
5014 SMTP commands that take arguments.
5016 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5019 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5020 "unknown" error; now it says that the functionality isn't in the binary.
5022 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5023 an address' error message when a string expansion fails (syntax or
5024 whatever). Otherwise the password may appear in the log. Following change
5025 PH/42 below, there is no longer a chance of it appearing in a bounce
5028 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5030 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5031 of its addresses was ever tried. (Bugzilla bug #2.)
5033 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5034 the result incorrectly in the debug output. (It correctly added a newline
5035 to what was transported.)
5037 TF/01 Added $received_time.
5039 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5040 commented out examples of how to interface to a virus scanner and to
5041 SpamAssassin. Also added commented examples of av_scanner and
5042 spamd_address settings.
5044 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5045 and controls are allowed in which ACLs. There were a couple of minor
5046 errors. Some of the entries in the conditions table (which is a table of
5047 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5048 negation of where the condition IS allowed.
5050 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5052 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5053 header file does not have a version number, so I've had to invent a new
5054 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5055 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5056 radiusclient), but it was contributed by a Radius user.
5058 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5059 files or directories, for OpenSSL.
5061 PH/19 When an Exim process that is running as root has to create an Exim log
5062 file, it does so in a subprocess that runs as exim:exim so as to get the
5063 ownership right at creation (otherwise, other Exim processes might see
5064 the file with the wrong ownership). There was no test for failure of this
5065 fork() call, which would lead to the process getting stuck as it waited
5066 for a non-existent subprocess. Forks do occasionally fail when resources
5067 run out. I reviewed all the other calls to fork(); they all seem to check
5070 PH/20 When checking for unexpected SMTP input at connect time (before writing
5071 the banner), Exim was not dealing correctly with a non-positive return
5072 from the read() function. If the client had disconnected by this time,
5073 the result was a log entry for a synchronization error with an empty
5074 string after "input=" when read() returned zero. If read() returned -1
5075 (an event I could not check), uninitialized data bytes were printed.
5076 There were reports of junk text (parts of files, etc) appearing after
5079 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5081 PH/22 Added support for macro redefinition, and (re)definition in between
5082 driver and ACL definitions.
5084 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5085 forgetting to use the resulting value; it was using the unexpanded value.
5087 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5088 hadn't been configured. The fix is from Juergen Kreileder, who
5089 understands it better than I do:
5091 "Here's what I see happening with three configured cyrus_sasl
5092 authenticators configured (plain, login, cram-md5):
5094 On startup auth_cyrus_sasl_init() gets called for each of these.
5095 This means three calls to sasl_listmech() without a specified mech_list.
5096 => SASL tests which mechs of all available mechs actually work
5097 => three warnings about OTP not working
5098 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5100 With the patch, sasl_listmech() also gets called three times. But now
5101 SASL's mech_list option is set to the server_mech specified in the the
5102 authenticator. Or in other words, the answer from sasl_listmech()
5103 gets limited to just the mech you're testing for (which is different
5105 => the return list contains just 'plain' or 'login', 'cram-md5' or
5106 nothing depending on the value of ob->server_mech.
5108 I've just tested the patch: Authentication still works fine,
5109 unavailable mechs specified in the exim configuration are still
5110 caught, and the auth.log warnings about OTP are gone."
5112 PH/25 When debugging is enabled, the contents of the command line are added
5113 to the debugging output, even when log_selector=+arguments is not
5116 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5117 answer is "GNU", and only if the return is "GNU/something" is the answer
5120 PH/27 $acl_verify_message is now set immediately after the failure of a
5121 verification in an ACL, and so is available in subsequent modifiers. In
5122 particular, the message can be preserved by coding like this:
5124 warn !verify = sender
5125 set acl_m0 = $acl_verify_message
5127 Previously, $acl_verify_message was set only while expanding "message"
5128 and "log_message" when a very denied access.
5130 PH/28 Modified OS/os.c-Linux with
5132 -#ifndef OS_LOAD_AVERAGE
5133 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5135 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5136 nomenclature these days.)
5138 PH/29 Installed patch from the Sieve maintainer that adds the options
5139 sieve_useraddress and sieve_subaddress to the redirect router.
5141 PH/30 In these circumstances:
5142 . Two addresses routed to the same list of hosts;
5143 . First host does not offer TLS;
5144 . First host accepts first address;
5145 . First host gives temporary error to second address;
5146 . Second host offers TLS and a TLS session is established;
5147 . Second host accepts second address.
5148 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5149 and peerdn, if requested) that were in fact used only for the second
5152 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5153 attention to any local part prefix or suffix that was matched by the
5154 router that accepted the address. It now behaves in the same way as it
5155 does for delivery: the affixes are removed from the local part unless
5156 rcpt_include_affixes is set on the transport.
5158 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5159 timeout during the DATA phase of an incoming message.
5161 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5162 applied a patch sanctioned by the Sieve maintainer.
5164 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5165 the uid or gid is negative. A case of a negative gid caused this to be
5166 noticed. The fix allows for either to be negative.
5168 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5169 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5172 PH/36 The change PH/12 above was broken. Fixed it.
5174 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5175 the grounds that routing the same address twice would always produce the
5176 same answer. This might have been true once, but it is certainly no
5177 longer true now. Routing a child address may depend on the previous
5178 routing that produced that child. Some complicated redirection strategies
5179 went wrong when messages had multiple recipients, and made Exim's
5180 behaviour dependent on the order in which the addresses were given.
5182 I have moved the duplicate checking until after the routing is complete.
5183 Exim scans the addresses that are assigned to local and remote
5184 transports, and removes any duplicates. This means that more work will be
5185 done, as duplicates will always all be routed, but duplicates are
5186 presumably rare, so I don't expect this is of any significance.
5188 For deliveries to pipes, files, and autoreplies, the duplicate checking
5189 still happens during the routing process, since they are not going to be
5192 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5193 It corrects a timeout issue with spamd. This is Ian's comment: "The
5194 background is that sometimes spamd either never reads data from a
5195 connection it has accepted, or it never writes response data. The exiscan
5196 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5197 blindly assumes that writes won't block so it may never time out."
5199 PH/39 Allow G after quota size as well as K and M.
5201 PH/40 The value set for $authenticated_id in an authenticator may not contain
5202 binary zeroes or newlines because the value is written to log lines and
5203 to spool files. There was no check on this. Now the value is run through
5204 the string_printing() function so that such characters are converted to
5205 printable escape sequences.
5207 PH/41 $message_linecount is a new variable that contains the total number of
5208 lines in the message. Compare $body_linecount, which is the count for the
5211 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5212 bounce and delay warning messages, except in certain special cases, which
5215 (a) An SMTP error message from a remote host;
5216 (b) A message specified in a :fail: redirection;
5217 (c) A message specified in a "fail" command in a system filter;
5218 (d) A message specified in a FAIL return from the queryprogram router;
5219 (e) A message specified by the cannot_route_message router option.
5221 In these cases only, Exim does include the error details in bounce and
5222 warning messages. There are also a few cases where bland messages such
5223 as "unrouteable address" or "local delivery error" are given.
5225 PH/43 $value is now also set for the "else" part of a ${run expansion.
5227 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5228 being worked on, but at least Exim now implements the latest version to
5231 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5232 process to complete was treated as a delivery failure, a timeout while
5233 writing the message to the pipe was logged, but erroneously treated as a
5234 successful delivery. Such timeouts include transport filter timeouts. For
5235 consistency with the overall process timeout, these timeouts are now
5236 treated as errors, giving rise to delivery failures by default. However,
5237 there is now a new Boolean option for the pipe transport called
5238 timeout_defer, which, if set TRUE, converts the failures into defers for
5239 both kinds of timeout. A transport filter timeout is now identified in
5242 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5243 systems where "make" and "gmake" are different, calling "gmake" at top
5244 level broke things. I've arranged for the value of $(MAKE) to be passed
5245 from the Makefile to this script so that it can call the same version of
5249 A note about Exim versions 4.44 and 4.50
5250 ----------------------------------------
5252 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5253 changes of various kinds. As a consequence, a big documentation update was
5254 needed. This delayed the release for rather longer than seemed good, especially
5255 in the light of a couple of (minor) security issues. Therefore, the changes
5256 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5257 release. So 4.44 and 4.50 are in effect two different branches that both start
5260 I have left the 4.50 change log unchanged; it contains all the changes since
5261 4.43. The change log for 4.44 is below; many of its items are identical to
5262 those for 4.50. This seems to be the most sensible way to preserve the
5263 historical information.
5269 1. Minor wording change to the doc/README.SIEVE file.
5271 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5272 computation of the current number of files was incorrect.
5274 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5275 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5278 4. Give more explanation in the error message when the command for a transport
5279 filter fails to execute.
5281 5. There are several places where Exim runs a non-Exim command in a
5282 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5283 was being done only for the command run by the queryprogram router. It is
5284 now done for all such subprocesses. The other cases are: ${run, transport
5285 filters, and the commands run by the lmtp and pipe transports.
5287 6. Added CONFIGURE_GROUP build-time option.
5289 7. Some older OS have a limit of 256 on the maximum number of file
5290 descriptors. Exim was using setrlimit() to set 1000 as a large value
5291 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5292 systems. I've change it so that if it can't get 1000, it tries for 256.
5294 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5295 was an oversight, and furthermore, ever since the addition of extra
5296 controls (e.g. 4.43/32), the checks on when to allow different forms of
5297 "control" were broken. There should now be diagnostics for all cases when a
5298 control that does not make sense is encountered.
5300 9. Added the /retain_sender option to "control=submission".
5302 10. $recipients is now available in the predata ACL (oversight).
5304 11. Tidy the search cache before the fork to do a delivery from a message
5305 received from the command line. Otherwise the child will trigger a lookup
5306 failure and thereby defer the delivery if it tries to use (for example) a
5307 cached ldap connection that the parent has called unbind on.
5309 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5310 of $address_data from the recipient verification was clobbered by the
5311 sender verification.
5313 13. The value of address_data from a sender verification is now available in
5314 $sender_address_data in subsequent conditions in the ACL statement.
5316 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5318 15. Added a new option "connect=<time>" to callout options, to set a different
5321 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5322 was its contents. (It was OK if the option was not defined at all.)
5324 17. A "Completed" log line is now written for messages that are removed from
5325 the spool by the -Mrm option.
5327 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5328 information about exactly what failed.
5330 19. Added -dd to debug only the daemon process.
5332 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5333 handles timeouts, both on the server side and network timeouts. Renamed the
5334 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5336 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5337 It is now set to "smtps".
5339 22. $host_address is now set to the target address during the checking of
5340 ignore_target_hosts.
5342 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5343 being passed; this would have caused $sender_host_name to have been used if
5344 matching the list had actually called for a host name (not very likely,
5345 since this list is usually IP addresses). A host name is now passed as
5348 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5349 code that specifies a non-restarting handler (typically sigaction() in
5350 modern systems) in an attempt to fix a rare and obscure crash bug.
5352 25. Narrowed the window for a race in the daemon that could cause it to ignore
5353 SIGCHLD signals. This is not a major problem, because they are used only to
5354 wake it up if nothing else does.
5356 26. A malformed maildirsize file could cause Exim to calculate negative values
5357 for the mailbox size or file count. Odd effects could occur as a result.
5358 The maildirsize information is now recalculated if the size or filecount
5361 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5362 support for a long time. Removed HAVE_SYS_VFS_H.
5364 28. Installed the latest version of exipick from John Jetmore.
5366 29. In an address list, if the pattern was not a regular expression, an empty
5367 subject address (from a bounce message) matched only if the pattern was an
5368 empty string. Non-empty patterns were not even tested. This was the wrong
5369 because it is perfectly reasonable to use an empty address as part of a
5370 database query. An empty address is now tested by patterns that are
5371 lookups. However, all the other forms of pattern expect the subject to
5372 contain a local part and a domain, and therefore, for them, an empty
5373 address still always fails if the pattern is not itself empty.
5375 30. Exim went into a mad DNS loop when attempting to do a callout where the
5376 host was specified on an smtp transport, and looking it up yielded more
5377 than one IP address.
5379 31. Re-factored the code for checking spool and log partition space into a
5380 function that finds that data and another that does the check. The former
5381 is then used to implement four new variables: $spool_space, $log_space,
5382 $spool_inodes, and $log_inodes.
5384 32. The RFC2047 encoding function was originally intended for short strings
5385 such as real names; it was not keeping to the 75-character limit for
5386 encoded words that the RFC imposes. It now respects the limit, and
5387 generates multiple encoded words if necessary. To be on the safe side, I
5388 have increased the buffer size for the ${rfc2047: expansion operator from
5391 33. It is now permitted to omit both strings after an "if" condition; if the
5392 condition is true, the result is "true". As before, when the second string
5393 is omitted, a false condition yields an empty string. This makes it less
5394 cumbersome to write custom ACL and router conditions.
5396 34. Failure to deliver a bounce message always caused it to be frozen, even if
5397 there was an errors_to setting on the router. The errors_to setting is now
5400 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5401 canonical form (fully expanded) before being placed in
5402 $sender_host_address.
5404 36. The table in the code that translates DNS record types into text (T_A to
5405 "A" for instance) was missing entries for NS and CNAME. It is just possible
5406 that this could have caused confusion if both these types were looked up
5407 for the same domain, because the text type is used as part of Exim's
5408 per-process caching. But the chance of anyone hitting this buglet seems
5411 37. The dnsdb lookup has been extended in a number of ways.
5413 (1) There is a new type, "zns", which walks up the domain tree until it
5414 finds some nameserver records. It should be used with care.
5416 (2) There is a new type, "mxh", which is like "mx" except that it returns
5417 just the host names, not the priorities.
5419 (3) It is now possible to give a list of domains (or IP addresses) to be
5420 looked up. The behaviour when one of the lookups defers can be
5421 controlled by a keyword.
5423 (4) It is now possible to specify the separator character for use when
5424 multiple records are returned.
5426 38. The dnslists ACL condition has been extended: it is now possible to supply
5427 a list of IP addresses and/or domains to be looked up in a particular DNS
5430 39. Added log_selector=+queue_time_overall.
5432 40. When running the queue in the test harness, wait just a tad after forking a
5433 delivery process, to get repeatability of debugging output.
5435 41. Include certificate and key file names in error message when GnuTLS fails
5436 to set them up, because the GnuTLS error message doesn't include the name
5437 of the failing file when there is a problem reading it.
5439 42. Allow both -bf and -bF in the same test run.
5441 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5443 44. The "Exiscan patch" is now merged into the mainline Exim source.
5445 45. Sometimes the final signoff response after QUIT could fail to get
5446 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5447 < 0 before doing a fflush(). This bug looks as though it goes back to the
5448 introduction of TLS in release 3.20, but "sometimes" must have been rare
5449 because the tests only now provoked it.
5451 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5452 (this can affect the format of dates).
5454 47. exim_tidydb, when checking for the continued existence of a message for
5455 which it has found a message-specific retry record, was not finding
5456 messages that were in split spool directories. Consequently, it was
5457 deleting retry records that should have stayed in existence.
5459 48. Steve fixed some bugs in eximstats.
5461 49. The SPA authentication driver was not abandoning authentication and moving
5462 on to the next authenticator when an expansion was forced to fail,
5463 contradicting the general specification for all authenticators. Instead it
5464 was generating a temporary error. It now behaves as specified.
5466 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5467 (the order specifies the preference for clients). The order is now AES256,
5468 AES128, 3DES, ARCFOUR128.
5470 51. Small patch to Sieve code - explicitly set From: when generating an
5473 52. Exim crashed if a remote delivery caused a very long error message to be
5474 recorded - for instance if somebody sent an entire SpamAssassin report back
5475 as a large number of 550 error lines. This bug was coincidentally fixed by
5476 increasing the size of one of Exim's internal buffers (big_buffer) that
5477 happened as part of the Exiscan merge. However, to be on the safe side, I
5478 have made the code more robust (and fixed the comments that describe what
5481 53. Now that there can be additional text after "Completed" in log lines (if
5482 the queue_time_overall log selector is set), a one-byte patch to exigrep
5483 was needed to allow it to recognize "Completed" as not the last thing in
5486 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5487 patch that reportedly fixes this has been added. I am not expert enough to
5488 create a test for it. This is what the patch creator wrote:
5490 "I found a little strange behaviour of ldap code when working with
5491 Windows 2003 AD Domain, where users was placed in more than one
5492 Organization Units. When I tried to give exim partial DN, the exit code
5493 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5494 But simultaneously result of request was absolutely normal ldap result,
5495 so I produce this patch..."
5497 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5498 REFERENCE, so I have modified the code to exclude the patch when that macro
5501 55. Some experimental protocols are using DNS PTR records for new purposes. The
5502 keys for these records are domain names, not reversed IP addresses. The
5503 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5504 leaves it alone. Component reversal etc. now happens only for IP addresses.
5507 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5509 57. Double the size of the debug message buffer (to 2048) so that more of very
5510 long debug lines gets shown.
5512 58. The exicyclog utility now does better if the number of log files to keep
5513 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5515 59. Two changes related to the smtp_active_hostname option:
5517 (1) $smtp_active_hostname is now available as a variable.
5518 (2) The default for smtp_banner uses $smtp_active_hostname instead
5519 of $primary_hostname.
5521 60. The host_aton() function is supposed to be passed a string that is known
5522 to be a valid IP address. However, in the case of IPv6 addresses, it was
5523 not checking this. This is a hostage to fortune. Exim now panics and dies
5524 if the condition is not met. A case was found where this could be provoked
5525 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5526 components; fortuitously, this particular loophole had already been fixed
5527 by change 4.50/55 above.
5529 If there are any other similar loopholes, the new check in host_aton()
5530 itself should stop them being exploited. The report I received stated that
5531 data on the command line could provoke the exploit when Exim was running as
5532 exim, but did not say which command line option was involved. All I could
5533 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5534 running as the user.
5537 61. There was a buffer overflow vulnerability in the SPA authentication code
5538 (which came originally from the Samba project). I have added a test to the
5539 spa_base64_to_bits() function which I hope fixes it.
5542 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5543 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5545 63. The daemon start-up calls getloadavg() while still root for those OS that
5546 need the first call to be done as root, but it missed one case: when
5547 deliver_queue_load_max is set with deliver_drop_privilege. This is
5548 necessary for the benefit of the queue runner, because there is no re-exec
5549 when deliver_drop_privilege is set.
5551 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5552 This has been fixed.
5554 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5555 was in use, was not putting the data itself into the right store pool;
5556 consequently, it could be overwritten for a subsequent message in the same
5557 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5560 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5562 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5563 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5564 the function were treating the return as a boolean value, which happened to
5565 work because 0=false and not-0=true, but is not correct code.
5567 68. The host_aton() function was not handling scoped IPv6 addresses (those
5568 with, for example, "%eth0" on the end) correctly.
5570 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5571 negated items (that is, ~something) in unsigned ints. Some compilers
5572 apparently mutter when there is no cast.
5574 70. If an address verification called from an ACL failed, and did not produce a
5575 user-specific message (i.e. there was only a "system" message), nothing was
5576 put in $acl_verify_message. In this situation, it now puts the system
5579 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5580 session; change 4.31/43 added the unwanted input to the log line - except
5581 that it did not do this in the start of session case. It now does.
5583 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5584 This is wrong and can cause the other end to generate a synchronization
5585 error if it is another Exim or anything else that does the synchronization
5586 check. A QUIT command is no longer sent after a timeout.
5588 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5589 during host lookups.
5591 74. The defer_ok option of callout verification was not working if it was used
5592 when verifying addresses in header lines, that is, for this case:
5594 verify = header_sender/callout=defer_ok
5596 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5597 those file descriptors could be used for SMTP connections. If anything
5598 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5599 could be sent to the SMTP client, causing chaos. The daemon now opens
5600 stdin, stdout, and stderr to /dev/null when it puts itself into the
5603 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5604 log by default. The user can override this with suitable Perl magic.
5606 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5607 the log message when discard triggers, was not working for the DATA ACL or
5608 for the non-SMTP ACL.
5610 78. Error message wording change in sieve.c.
5612 79. If smtp_accept_max_per_host was set, the number of connections could be
5613 restricted to fewer than expected, because the daemon was trying to set up
5614 a new connection before checking whether the processes handling previous
5615 connections had finished. The check for completed processes is now done
5616 earlier. On busy systems, this bug wouldn't be noticed because something
5617 else would have woken the daemon, and it would have reaped the completed
5620 80. If a message was submitted locally by a user whose login name contained one
5621 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5622 It caused a spool format error. I have fixed the spool reading code. A
5623 related problem was that the "from" clause in the Received: line became
5624 illegal because of the space(s). It is now covered by ${quote_local_part.
5626 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5629 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5631 83. Patch from Sieve maintainer to fix unterminated string problem in
5632 "vacation" handling.
5634 84. Some minor changes to the Linux configuration files to help with other
5635 OS variants using glibc.
5637 85. One more patch for Sieve to update vacation handling to latest spec.
5640 ----------------------------------------------------
5641 See the note above about the 4.44 and 4.50 releases.
5642 ----------------------------------------------------
5648 1. Change 4.43/35 introduced a bug that caused file counts to be
5649 incorrectly computed when quota_filecount was set in an appendfile
5652 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5653 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5656 3. Give more explanation in the error message when the command for a transport
5657 filter fails to execute.
5659 4. There are several places where Exim runs a non-Exim command in a
5660 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5661 was being done only for the command run by the queryprogram router. It is
5662 now done for all such subprocesses. The other cases are: ${run, transport
5663 filters, and the commands run by the lmtp and pipe transports.
5665 5. Some older OS have a limit of 256 on the maximum number of file
5666 descriptors. Exim was using setrlimit() to set 1000 as a large value
5667 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5668 systems. I've change it so that if it can't get 1000, it tries for 256.
5670 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5671 was an oversight, and furthermore, ever since the addition of extra
5672 controls (e.g. 4.43/32), the checks on when to allow different forms of
5673 "control" were broken. There should now be diagnostics for all cases when a
5674 control that does not make sense is encountered.
5676 7. $recipients is now available in the predata ACL (oversight).
5678 8. Tidy the search cache before the fork to do a delivery from a message
5679 received from the command line. Otherwise the child will trigger a lookup
5680 failure and thereby defer the delivery if it tries to use (for example) a
5681 cached ldap connection that the parent has called unbind on.
5683 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5684 of $address_data from the recipient verification was clobbered by the
5685 sender verification.
5687 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5688 was its contents. (It was OK if the option was not defined at all.)
5690 11. A "Completed" log line is now written for messages that are removed from
5691 the spool by the -Mrm option.
5693 12. $host_address is now set to the target address during the checking of
5694 ignore_target_hosts.
5696 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5697 being passed; this would have caused $sender_host_name to have been used if
5698 matching the list had actually called for a host name (not very likely,
5699 since this list is usually IP addresses). A host name is now passed as
5702 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5703 code that specifies a non-restarting handler (typically sigaction() in
5704 modern systems) in an attempt to fix a rare and obscure crash bug.
5706 15. Narrowed the window for a race in the daemon that could cause it to ignore
5707 SIGCHLD signals. This is not a major problem, because they are used only to
5708 wake it up if nothing else does.
5710 16. A malformed maildirsize file could cause Exim to calculate negative values
5711 for the mailbox size or file count. Odd effects could occur as a result.
5712 The maildirsize information is now recalculated if the size or filecount
5715 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5716 support for a long time. Removed HAVE_SYS_VFS_H.
5718 18. Updated exipick to current release from John Jetmore.
5720 19. Allow an empty sender to be matched against a lookup in an address list.
5721 Previously the only cases considered were a regular expression, or an
5724 20. Exim went into a mad DNS lookup loop when doing a callout where the
5725 host was specified on the transport, if the DNS lookup yielded more than
5728 21. The RFC2047 encoding function was originally intended for short strings
5729 such as real names; it was not keeping to the 75-character limit for
5730 encoded words that the RFC imposes. It now respects the limit, and
5731 generates multiple encoded words if necessary. To be on the safe side, I
5732 have increased the buffer size for the ${rfc2047: expansion operator from
5735 22. Failure to deliver a bounce message always caused it to be frozen, even if
5736 there was an errors_to setting on the router. The errors_to setting is now
5739 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5740 canonical form (fully expanded) before being placed in
5741 $sender_host_address.
5743 24. Updated eximstats to version 1.33
5745 25. Include certificate and key file names in error message when GnuTLS fails
5746 to set them up, because the GnuTLS error message doesn't include the name
5747 of the failing file when there is a problem reading it.
5749 26. Expand error message when OpenSSL has problems setting up cert/key files.
5752 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5753 (this can affect the format of dates).
5755 28. exim_tidydb, when checking for the continued existence of a message for
5756 which it has found a message-specific retry record, was not finding
5757 messages that were in split spool directories. Consequently, it was
5758 deleting retry records that should have stayed in existence.
5760 29. eximstats updated to version 1.35
5761 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5762 1.35 - bugfix such that pie charts by volume are generated correctly
5764 30. The SPA authentication driver was not abandoning authentication and moving
5765 on to the next authenticator when an expansion was forced to fail,
5766 contradicting the general specification for all authenticators. Instead it
5767 was generating a temporary error. It now behaves as specified.
5769 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5770 (the order specifies the preference for clients). The order is now AES256,
5771 AES128, 3DES, ARCFOUR128.
5773 31. Small patch to Sieve code - explicitly set From: when generating an
5776 32. Exim crashed if a remote delivery caused a very long error message to be
5777 recorded - for instance if somebody sent an entire SpamAssassin report back
5778 as a large number of 550 error lines. This bug was coincidentally fixed by
5779 increasing the size of one of Exim's internal buffers (big_buffer) that
5780 happened as part of the Exiscan merge. However, to be on the safe side, I
5781 have made the code more robust (and fixed the comments that describe what
5784 33. Some experimental protocols are using DNS PTR records for new purposes. The
5785 keys for these records are domain names, not reversed IP addresses. The
5786 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5787 leaves it alone. Component reversal etc. now happens only for IP addresses.
5790 34. The host_aton() function is supposed to be passed a string that is known
5791 to be a valid IP address. However, in the case of IPv6 addresses, it was
5792 not checking this. This is a hostage to fortune. Exim now panics and dies
5793 if the condition is not met. A case was found where this could be provoked
5794 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5795 components; fortuitously, this particular loophole had already been fixed
5796 by change 4.50/55 or 4.44/33 above.
5798 If there are any other similar loopholes, the new check in host_aton()
5799 itself should stop them being exploited. The report I received stated that
5800 data on the command line could provoke the exploit when Exim was running as
5801 exim, but did not say which command line option was involved. All I could
5802 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5803 running as the user.
5806 35. There was a buffer overflow vulnerability in the SPA authentication code
5807 (which came originally from the Samba project). I have added a test to the
5808 spa_base64_to_bits() function which I hope fixes it.
5811 36. The daemon start-up calls getloadavg() while still root for those OS that
5812 need the first call to be done as root, but it missed one case: when
5813 deliver_queue_load_max is set with deliver_drop_privilege. This is
5814 necessary for the benefit of the queue runner, because there is no re-exec
5815 when deliver_drop_privilege is set.
5817 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5818 was in use, was not putting the data itself into the right store pool;
5819 consequently, it could be overwritten for a subsequent message in the same
5820 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5823 38. Sometimes the final signoff response after QUIT could fail to get
5824 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5825 < 0 before doing a fflush(). This bug looks as though it goes back to the
5826 introduction of TLS in release 3.20, but "sometimes" must have been rare
5827 because the tests only now provoked it.
5833 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5834 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5835 Now it returns an integer. A number of calls were still expecting a T/F
5836 return. Fortuitously, in all cases, the tests worked in OK situations,
5837 which is the norm. However, things would have gone wrong on any write
5838 failures on the smtp file descriptor. This function is used when sending
5839 messages over SMTP and also when doing verify callouts.
5841 2. When Exim is called to do synchronous delivery of a locally submitted
5842 message (the -odf or -odi options), it no longer closes stderr before doing
5845 3. Implemented the mua_wrapper option.
5847 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5849 5. Implemented the functions header_remove(), header_testname(),
5850 header_add_at_position(), and receive_remove_recipient(), and exported them
5853 6. If an ACL "warn" statement specified the addition of headers, Exim already
5854 inserted X-ACL-Warn: at the start if there was no header name. However, it
5855 was not making this test for the second and subsequent header lines if
5856 there were newlines in the string. This meant that an invalid header could
5857 be inserted if Exim was badly configured.
5859 7. Allow an ACL "warn" statement to add header lines at the start or after all
5860 the Received: headers, as well as at the end.
5862 8. Added the rcpt_4xx retry error code.
5864 9. Added postmaster_mailfrom=xxx to callout verification option.
5866 10. Added mailfrom=xxxx to the callout verification option, for verify=
5869 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5870 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5872 12. Inserted some casts to stop certain compilers warning when using pointer
5873 differences as field lengths or precisions in printf-type calls (mostly
5874 affecting debugging statements).
5876 13. Added optional readline() support for -be (dynamically loaded).
5878 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5879 same clock tick as a message's arrival, so that its received time was the
5880 same as the "first fail" time on the retry record, and that message
5881 remained on the queue past the ultimate address timeout, every queue runner
5882 would try a delivery (because it was past the ultimate address timeout) but
5883 after another failure, the ultimate address timeout, which should have then
5884 bounced the address, did not kick in. This was a "< instead of <=" error;
5885 in most cases the first failure would have been in the next clock tick
5886 after the received time, and all would be well.
5888 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5889 being recognized when the domain list was tested by the match_domain
5890 condition in an expansion string.
5892 16. Added the ${str2b64: operator.
5894 17. Exim was always calling setrlimit() to set a large limit for the number of
5895 processes, without checking whether the existing limit was already
5896 adequate. (It did check for the limit on file descriptors.) Furthermore,
5897 errors from getrlimit() and setrlimit() were being ignored. Now they are
5898 logged to the main and panic logs, but Exim does carry on, to try to do its
5899 job under whatever limits there are.
5901 18. Imported PCRE 5.0.
5903 19. Trivial typo in log message " temporarily refused connection" (the leading
5906 20. If the log selector return_path_on_delivery was set and an address was
5907 redirected to /dev/null, the delivery process crashed because it assumed
5908 that a return path would always be set for a "successful" delivery. In this
5909 case, the whole delivery is bypassed as an optimization, and therefore no
5912 21. Internal re-arrangement: the function for sending a challenge and reading
5913 a response while authentication was assuming a zero-terminated challenge
5914 string. It's now changed to take a pointer and a length, to allow for
5915 binary data in such strings.
5917 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5919 23. Exim was not respecting finduser_retries when seeking the login of the
5920 uid under which it was called; it was always trying 10 times. (The default
5921 setting of finduser_retries is zero.) Also, it was sleeping after the final
5922 failure, which is pointless.
5924 24. Implemented tls_on_connect_ports.
5926 25. Implemented acl_smtp_predata.
5928 26. If the domain in control=submission is set empty, Exim assumes that the
5929 authenticated id is a complete email address when it generates From: or
5930 Sender: header lines.
5932 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5933 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5934 chown and chgrp in /bin and hostname in /usr/bin.
5936 28. Exim was keeping the "process log" file open after each use, just as it
5937 does for the main log. This opens the possibility of it remaining open for
5938 long periods when the USR1 signal hits a daemon. Occasional processlog
5939 errors were reported, that could have been caused by this. Anyway, it seems
5940 much more sensible not to leave this file open at all, so that is what now
5943 29. The long-running daemon process does not normally write to the log once it
5944 has entered its main loop, and it closes the log before doing so. This is
5945 so that log files can straightforwardly be renamed and moved. However,
5946 there are a couple of unusual error situations where the daemon does write
5947 log entries, and I had neglected to close the log afterwards.
5949 30. The text of an SMTP error response that was received during a remote
5950 delivery was being truncated at 512 bytes. This is too short for some of
5951 the long messages that one sometimes sees. I've increased the limit to
5954 31. It is now possible to make retry rules that apply only when a message has a
5955 specific sender, in particular, an empty sender.
5957 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5958 it possible to be selective about when SMTP synchronization is enforced.
5960 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5962 32. Implemented hosts_connection_nolog.
5964 33. Added an ACL for QUIT.
5966 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5969 35. Added mailbox_size and mailbox_filecount to appendfile.
5971 36. Added control = no_multiline_responses to ACLs.
5973 37. There was a bug in the logic of the code that waits for the clock to tick
5974 in the case where the clock went backwards by a substantial amount such
5975 that the microsecond fraction of "now" was more than the microsecond
5976 fraction of "then" (but the whole seconds number was less).
5978 38. Added support for the libradius Radius client library this is found on
5979 FreeBSD (previously only the radiusclient library was supported).
5985 1. When certain lookups returned multiple values in the form name=value, the
5986 quoting of the values was not always being done properly. Specifically:
5987 (a) If the value started with a double quote, but contained no whitespace,
5989 (b) If the value contained whitespace other than a space character (i.e.
5990 tabs or newlines or carriage returns) it was not quoted.
5991 This fix has been applied to the mysql and pgsql lookups by writing a
5992 separate quoting function and calling it from the lookup code. The fix
5993 should probably also be applied to nisplus, ibase and oracle lookups, but
5994 since I cannot test any of those, I have not disturbed their existing code.
5996 2. A hit in the callout cache for a specific address caused a log line with no
5997 reason for rejecting RCPT. Now it says "Previous (cached) callout
5998 verification failure".
6000 3. There was an off-by-one bug in the queryprogram router. An over-long
6001 return line was truncated at 256 instead of 255 characters, thereby
6002 overflowing its buffer with the terminating zero. As well as fixing this, I
6003 have increased the buffer size to 1024 (and made a note to document this).
6005 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6006 when Exim is waiting for an SMTP response from a remote server, Exim
6007 restarts its select() call on the socket, thereby resetting its timeout.
6008 This is not a problem when such interrupts are rare. Somebody set up a cron
6009 job to run exiwhat every 2 minutes, which is less than the normal select()
6010 timeout (5 or 10 minutes). This meant that the select() timeout never
6011 kicked in because it was always reset. I have fixed this by comparing the
6012 time when an interrupt arrives with the time at the start of the first call
6013 to select(). If more time than the timeout has elapsed, the interrupt is
6014 treated as a timeout.
6016 5. Some internal re-factoring in preparation for the addition of Sieve
6017 extensions (by MH). In particular, the "personal" test is moved to a
6018 separate function, and given an option for scanning Cc: and Bcc: (which is
6019 not set for Exim filters).
6021 6. When Exim created an email address using the login of the caller as the
6022 local part (e.g. when creating a From: or Sender: header line), it was not
6023 quoting the local part when it contained special characters such as @.
6025 7. Installed new OpenBSD configuration files.
6027 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6028 try to make them clearer.
6030 9. Callout options, other than the timeout value, were being ignored when
6031 verifying sender addresses in header lines. For example, when using
6033 verify = header_sender/callout=no_cache
6035 the cache was (incorrectly) being used.
6037 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6038 only the Cygwin environment.
6040 11. When return_path_on_delivery was set as a log selector, if different remote
6041 addresses in the same message used different return paths and parallel
6042 remote delivery occurred, the wrong values would sometimes be logged.
6043 (Whenever a remote delivery process finished, the return path value from
6044 the most recently started remote delivery process was logged.)
6046 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6047 lines when AUTH and/or TLS are in use. This is the "received protocol"
6048 field. Exim used to use "asmtp" for authenticated SMTP, without any
6049 indication (in the protocol name) for TLS use. Now it follows the RFC and
6050 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6051 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6052 names appear in log lines as well as in Received: header lines.
6054 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6055 extensions, and comparison tests, and to fix some bugs.
6057 14. Changes to the "personal" filter test:
6059 (1) The test was buggy in that it was just doing the equivalent of
6060 "contains" tests on header lines. For example, if a user's address was
6061 anne@some.where, the "personal" test would incorrectly be true for
6063 To: susanne@some.where
6065 This test is now done by extracting each address from the header in turn,
6066 and checking the entire address. Other tests that are part of "personal"
6067 are now done using regular expressions (for example, to check local parts
6068 of addresses in From: header lines).
6070 (2) The list of non-personal local parts in From: addresses has been
6071 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6072 taken from the Sieve specification recommendations.
6074 (3) If the message contains any header line starting with "List-" it is
6075 treated as non-personal.
6077 (4) The test for "circular" in the Subject: header line has been removed
6078 because it now seems ill-conceived.
6080 15. Minor typos in src/EDITME comments corrected.
6082 16. Installed latest exipick from John Jetmore.
6084 17. If headers_add on a router specified a text string that was too long for
6085 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6086 of string_sprintf() is now avoided.
6088 18. $message_body_size was not set (it was always zero) when running the DATA
6089 ACL and the local_scan() function.
6091 19. For the "mail" command in an Exim filter, no default was being set for
6092 the once_repeat time, causing a random time value to be used if "once" was
6093 specified. (If the value happened to be <= 0, no repeat happened.) The
6094 default is now 0s, meaning "never repeat". The "vacation" command was OK
6095 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6096 (I found it when inspecting the code).
6098 20. There is now an overall timeout for performing a callout verification. It
6099 defaults to 4 times the callout timeout, which applies to individual SMTP
6100 commands during the callout. The overall timeout applies when there is more
6101 than one host that can be tried. The timeout is checked before trying the
6102 next host. This prevents very long delays if there are a large number of
6103 hosts and all are timing out (e.g. when the network connections are timing
6104 out). The value of the overall timeout can be changed by specifying an
6105 additional sub-option for "callout", called "maxwait". For example:
6107 verify = sender/callout=5s,maxwait=20s
6109 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6110 to the end before writing, but this should make it even safer).
6112 22. Exim was forgetting that it had advertised PIPELINING for the second and
6113 subsequent messages on an SMTP connection. It was also not resetting its
6114 memory on STARTTLS and an internal HELO.
6116 23. When Exim logs an SMTP synchronization error within a session, it now
6117 records whether PIPELINING has been advertised or not.
6119 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6120 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6121 rather than long int.
6123 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6125 26. Added the never_mail option to autoreply.
6131 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6132 crash if the getsockname() call failed; this can happen if a connection is
6133 closed very soon after it is established. The problem was simply in the
6134 order in which certain operations were done, causing Exim to try to write
6135 to the SMTP stream before it had set up the file descriptor. The bug has
6136 been fixed by making things happen in the correct order.
6142 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6143 before the connection was closed, thus losing the rejection response.
6145 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6146 some early Solaris releases, but causes trouble in current releases where
6147 socklen_t is defined.
6149 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6152 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6155 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6156 that releasing the top of it at the end releases what was used for sub-
6157 expansions (unless the block got too big). However, discard this block if
6158 the first thing is a variable or header, so that we can use its block when
6159 it is dynamic (useful for very large $message_headers, for example).
6161 6. Lookups now cache *every* query, not just the most recent. A new, separate
6162 store pool is used for this. It can be recovered when all lookup caches are
6163 flushed. Lookups now release memory at the end of their result strings.
6164 This has involved some general refactoring of the lookup sources.
6166 7. Some code has been added to the store_xxx() functions to reduce the amount
6167 of flapping under certain conditions.
6169 8. log_incoming_interface used to affect only the <= reception log lines. Now
6170 it causes the local interface and port to be added to several more SMTP log
6171 lines, for example "SMTP connection from", and rejection lines.
6173 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6175 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6177 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6178 could be overwritten at the end of the current message (or the start of a
6179 new message if it was set in a HELO ACL). The value is now preserved for
6180 the duration of the SMTP connection.
6182 12. If a transport had a headers_rewrite setting, and a matching header line
6183 contained an unqualified address, that address was qualified, even if it
6184 did not match any rewriting rules. The underlying bug was that the values
6185 of the flags that permit the existence of unqualified sender and recipient
6186 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6187 non-local messages, and by -bnq for local messages) were not being
6188 preserved with the message after it was received.
6190 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6191 "next input=" as part of the text comprising the host identity instead of
6192 the correct text. The code was using the same buffer for two different
6193 strings. However, depending on which order the printing function evaluated
6194 its arguments, the bug did not always show up. Under Linux, for example, my
6195 test suite worked just fine.
6197 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6198 doesn't work with some older versions of Perl. It has been changed to "my",
6199 which in any case is probably the better facility to use.
6201 15. A really picky compiler found some instances of statements for creating
6202 error messages that either had too many or two few arguments for the format
6205 16. The size of the buffer for calls to the DNS resolver has been increased
6206 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6207 for addresses that have a lot of PTR records. This alleviates a problem; it
6208 does not fully solve it.
6210 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6211 buffer now truncates the list and logs the incident, which is the same
6212 action as happens when Exim is looking up a host name and its aliases.
6213 Previously in this situation something unpredictable would happen;
6214 sometimes it was "internal error: store_reset failed".
6216 18. If a server dropped the connection unexpectedly when an Exim client was
6217 using GnuTLS and trying to read a response, the client delivery process
6218 crashed while trying to generate an error log message.
6220 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6221 string, for example:
6223 warn message = H1: something\nH2: something
6225 the text was added as a single header line from Exim's point of view
6226 though it ended up OK in the delivered message. However, searching for the
6227 second and subsequent header lines using $h_h2: did not work. This has been
6228 fixed. Similarly, if a system filter added multiple headers in this way,
6229 the routers could not see them.
6231 20. Expanded the error message when iplsearch is called with an invalid key to
6232 suggest using net-iplsearch in a host list.
6234 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6235 ACLs are no longer actually imposed (and a message to that effect is
6238 22. If a "gecos" field in a passwd entry contained escaped characters, in
6239 particular, if it contained a \" sequence, Exim got it wrong when building
6240 a From: or a Sender: header from that name. A second bug also caused
6241 incorrect handling when an unquoted " was present following a character
6242 that needed quoting.
6244 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6245 was not being matched caselessly.
6247 24. Arranged for all hyphens in the exim.8 source to be escaped with
6250 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6251 properly. Recipient callout cache records were still being keyed to include
6252 the sender, even when use_sender was set false. This led to far more
6253 callouts that were necessary. The sender is no longer included in the key
6254 when use_sender is false.
6256 26. Added "control = submission" modifier to ACLs.
6258 27. Added the ${base62d: operator to decode base 62 numbers.
6260 28. dnsdb lookups can now access SRV records.
6262 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6263 the configuration file.
6265 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6266 (-v) mode. This makes the output for a verbose queue run more intelligible.
6268 31. Added a use_postmaster feature to recipient callouts.
6270 32. Added the $body_zerocount variable, containing the number of binary zero
6271 bytes in the message body.
6273 33. The time of last modification of the "new" subdirectory is now used as the
6274 "mailbox time last read" when there is a quota error for a maildir
6277 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6279 35. Added +ignore_unknown as a special item in host lists.
6281 36. Code for decoding IPv6 addresses in host lists is now included, even if
6282 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6283 address was recognized as an IP address, but was then not correctly decoded
6284 into binary, causing unexpected and incorrect effects when compared with
6291 1. Very minor rewording of debugging text in manualroute to say "list of
6292 hosts" instead of "hostlist".
6294 2. If verify=header_syntax was set, and a header line with an unqualified
6295 address (no domain) and a large number of spaces between the end of the
6296 name and the colon was received, the reception process suffered a buffer
6297 overflow, and (when I tested it) crashed. This was caused by some obsolete
6298 code that should have been removed. The fix is to remove it!
6300 3. When running in the test harness, delay a bit after writing a bounce
6301 message to get a bit more predictability in the log output.
6303 4. Added a call to search_tidyup() just before forking a reception process. In
6304 theory, someone could use a lookup in the expansion of smtp_accept_max_
6305 per_host which, without the tidyup, could leave open a database connection.
6307 5. Added the variables $recipient_data and $sender_data which get set from a
6308 lookup success in an ACL "recipients" or "senders" condition, or a router
6309 "senders" option, similar to $domain_data and $local_part_data.
6311 6. Moved the writing of debug_print from before to after the "senders" test
6314 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6315 problems for message scanning, either using a data ACL, or using
6316 local_scan() because the Received: header was not generated till after they
6317 were called (in order to set the time as the time of reception completion).
6318 I have revised the way this works. The header is now generated after the
6319 body is received, but before the ACL or local_scan() are called. After they
6320 are run, the timestamp in the header is updated.
6326 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6327 before starting a queue runner without re-exec. This happened only when
6328 deliver_drop_privilege was set or when the Exim user was set to root. The
6329 effect of the bug was that timeouts during subsequent deliveries caused
6330 crashes instead of being properly handled. The handler is now left at its
6331 default (and expected) setting.
6333 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6334 message, again when deliver_drop_privilege is set or Exim is run as root.
6335 The bug described in (1) was not present in this case, but the tidying up
6336 of the other signals was missing. I have made the two cases consistent.
6338 3. The ignore_target_hosts setting on a manualroute router was being ignored
6339 for hosts that were looked up using the /MX notation.
6341 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6344 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6345 operated on the sender address. After changing the $sender_address to <>
6346 for the sender address verify, Exim was re-instated it as the original
6347 (before rewriting) address, but remembering that it had rewritten it, so it
6348 wasn't rewriting it again. This bug also had the effect of breaking the
6349 sender address verification caching when the sender address was rewritten.
6351 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6352 This has been changed so that if the ip literal address matches
6353 ignore_target_hosts, the router declines.
6355 7. Added expansion conditions match_domain, match_address, and match_local_
6356 part (NOT match_host).
6358 8. The placeholder for the Received: header didn't have a length field set.
6360 9. Added code to Exim itself and to exim_lock to test for a specific race
6361 condition that could lead to file corruption when using MBX delivery. The
6362 issue is with the lockfile that is created in /tmp. If this file is removed
6363 after a process has opened it but before that process has acquired a lock,
6364 there is the potential for a second process to recreate the file and also
6365 acquire a lock. This could lead to two Exim processes writing to the file
6366 at the same time. The added code performs the same test as UW imapd; it
6367 checks after acquiring the lock that its file descriptor still refers to
6368 the same named file.
6370 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6371 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6374 11. Added the smtp_active_hostname option. If used, this will typically be made
6375 to depend on the incoming interface address. Because $interface_address is
6376 not set up until the daemon has forked a reception process, error responses
6377 that can happen earlier (such as "too many connections") no longer contain
6380 12. If an expansion in a condition on a "warn" statement fails because a lookup
6381 defers, the "warn" statement is abandoned, and the next ACL statement is
6382 processed. Previously this caused the whole ACL to be aborted.
6384 13. Added the iplsearch lookup type.
6386 14. Added ident_timeout as a log selector.
6388 15. Added tls_certificate_verified as a log selector.
6390 16. Added a global option tls_require_ciphers (compare the smtp transport
6391 option of the same name). This controls incoming TLS connections.
6393 17. I finally figured out how to make tls_require_ciphers do a similar thing
6394 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6395 before starting the TLS session.
6397 18. Tabs are now shown as \t in -bP output.
6399 19. If the log selector return_path_on_delivery was set, Exim crashed when
6400 bouncing a message because it had too many Received: header lines.
6402 20. If two routers both had headers_remove settings, and the first one included
6403 a superfluous trailing colon, the final name in the first list and the
6404 first name in the second list were incorrectly joined into one item (with a
6405 colon in the middle).
6411 1. Added -C and -D options to the exinext utility, mainly to make it easier
6412 to include in the automated testing, but these could be helpful when
6413 multiple configurations are in use.
6415 2. The exinext utility was not formatting the output nicely when there was
6416 an alternate port involved in the retry record key, nor when there was a
6417 message id as well (for retries that were specific to a specific message
6418 and a specific host). It was also confused by IPv6 addresses, because of
6419 the additional colons they contain. I have fixed the IPv4 problem, and
6420 patched it up to do a reasonable job for IPv6.
6422 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6423 delivery, the log line now contains "pipelined" if PIPELINING was used.
6425 4. An SMTP transport process used to panic and die if the bind() call to set
6426 an explicit outgoing interface failed. This has been changed; it is now
6427 treated in the same way as a connect() failure.
6429 5. A reference to $sender_host_name in the part of a conditional expansion
6430 that was being skipped was still causing a DNS lookup. This no longer
6433 6. The def: expansion condition was not recognizing references to header lines
6434 that used bh_ and bheader_.
6436 7. Added the _cache feature to named lists.
6438 8. The code for checking quota_filecount in the appendfile transport was
6439 allowing one more file than it should have been.
6441 9. For compatibility with Sendmail, the command line option
6449 and sets the incoming protocol and host name (for trusted callers). The
6450 host name and its colon can be omitted when only the protocol is to be set.
6451 Note the Exim already has two private options, -pd and -ps, that refer to
6452 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6453 "s", but I don't think that's a major issue.
6455 10. A number of refactoring changes to the code, none of which should affect
6458 (a) The number of logging options was getting close to filling up the
6459 32-bit word that was used as a bit map. I have split them into two classes:
6460 those that are passed in the argument to log_write(), and those that are
6461 only ever tested independently outside of that function. These are now in
6462 separate 32-bit words, so there is plenty of room for expansion again.
6463 There is no change in the user interface or the logging behaviour.
6465 (b) When building, for example, log lines, the code previously used a
6466 macro that called string_cat() twice, in order to add two strings. This is
6467 not really sufficiently general. Furthermore, there was one instance where
6468 it was actually wrong because one of the argument was used twice, and in
6469 one call a function was used. (As it happened, calling the function twice
6470 did not affect the overall behaviour.) The macro has been replaced by a
6471 function that can join an arbitrary number of extra strings onto a growing
6474 (c) The code for expansion conditions now uses a table and a binary chop
6475 instead of a serial search (which was left over from when there were very
6476 few conditions). Also, it now recognizes conditions like "pam" even when
6477 the relevant support is not compiled in: a suitably worded error message is
6478 given if an attempt is made to use such a condition.
6480 11. Added ${time_interval:xxxxx}.
6482 12. A bug was causing one of the ddress fields not to be passed back correctly
6483 from remote delivery subprocesses. The field in question was not being
6484 subsequently used, so this caused to problems in practice.
6486 13. Added new log selectors queue_time and deliver_time.
6488 14. Might have fixed a bug in maildirsizefile handling that threw up
6489 "unexpected character" debug warnings, and recalculated the data
6490 unnecessarily. In any case, I expanded the warning message to give more
6493 15. Added the message "Restricted characters in address" to the statements in
6494 the default ACL that block characters like @ and % in local parts.
6496 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6497 Three changes have been made:
6499 (a) There was a serious bug; a negative response to MAIL caused the whole
6500 recipient domain to be cached as invalid, thereby blocking all messages
6501 to all local parts at the same domain, from all senders. This bug has
6502 been fixed. The domain is no longer cached after a negative response to
6503 MAIL if the sender used is not empty.
6505 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6508 (c) A new callout option, "use_sender" has been added for people who want
6509 the modified behaviour.
6515 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6518 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6519 indeed breaks things for older releases.
6521 3. Added additional logging to the case where there is a problem reading data
6522 from a filter that is running in a subprocess using a pipe, in order to
6523 try to track down a specific problem.
6525 4. Testing facility fudge: when running in the test harness and attempting
6526 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6527 getting "No route to host". Convert this to a timeout.
6529 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6532 6. Some OS don't have socklen_t but use size_t instead. This affects the
6533 fifth argument of getsockopt() amongst other things. This is now
6534 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6535 can be set for individual OS. I have set it for SunOS5, OSF1, and
6536 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6537 some earlier ones do not.
6539 7. Change 4.30/15 was not doing the test caselessly.
6541 8. The standard form for an IPv6 address literal was being rejected by address
6542 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6543 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6544 this, as well as the form without the "IPv6" on the front (but only when
6545 address literals are enabled, of course).
6547 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6549 10. Exim crashed if a message with an empty sender address specified by -f
6550 encountered a router with an errors_to setting. This could be provoked only
6551 by a command such as
6555 where an empty string was supplied; "<>" did not hit this bug.
6557 11. Installed PCRE release 4.5.
6559 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6560 remained set. It is now erased.
6562 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6563 times from message ids (which are base 36 rather than the normal 62).
6565 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6566 were being counted as actual protocol errors, and logged if the log
6567 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6568 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6569 and DATA following a set of rejected RCPTs do not count as protocol errors.
6570 In other words, Exim assumes they were pipelined, though this may not
6571 actually be the case. Of course, in all cases the client gets an
6572 appropriate error code.
6574 15. If a lookup fails in an ACL condition, a message about the failure may
6575 be available; it is used if testing the ACL cannot continue, because most
6576 such messages specify what the cause of the deferral is. However, some
6577 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6578 that caused an old message to be retained and used if a later statement
6579 caused a defer, replacing the real cause of the deferral.
6581 16. If an IP address had so many PTR records that the DNS lookup buffer
6582 was not large enough to hold them, Exim could crash while trying to process
6583 the truncated data. It now detects and logs this case.
6585 17. Further to 4.21/58, another change has been made: if (and only if) the
6586 first line of a message (the first header line) ends with CRLF, a bare LF
6587 in a subsequent header line has a space inserted after it, so as not to
6588 terminate the header.
6590 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6591 unnecessarily, used atoi() instead of strtol(), and didn't check the
6592 termination when getting file sizes from file names by regex.
6594 19. Completely re-implemented the support for maildirsize files, in the light
6595 of a number of problems with the previous contributed implementation
6596 (4.30/29). In particular:
6598 . If the quota is zero, the maildirsize file is maintained, but no quota is
6601 . If the maildir directory does not exist, it is created before any attempt
6602 to write a maildirsize file.
6604 . The quota value in the file is just a cache; if the quota is changed in
6605 the transport, the new value overrides.
6607 . A regular expression is available for excluding directories from the
6610 20. The autoreply transport checks the characters in options that define the
6611 message's headers; it allows continued headers, but it was checking with
6612 isspace() after an embedded newline instead of explicitly looking for a
6615 21. If all the "regular" hosts to which an address was routed had passed their
6616 expiry times, and had not reached their retry times, the address was
6617 bounced, even if fallback hosts were defined. Now Exim should go on to try
6620 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6621 equivalent code in the SMTP transport. Some hosts send humungous responses
6622 to HELO/EHLO, more than 1024 it seems.
6624 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6625 gives compiler warnings in some environments. I've now done it "properly",
6628 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6629 (because of problems with the built-in one) was declared to return uschar *
6630 instead of char *, causing compiler failure.
6632 25. Fixed a file descriptor leak when processing alias/forward files.
6634 26. Fixed a minor format string issue in dbfn.c.
6636 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6638 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6639 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6642 29. When a sender address is verified, it is cached, to save repeating the test
6643 when there is more than one recipient in a message. However, when the
6644 verification involves a callout, it is possible for different callout
6645 options to be set for different recipients. It is too complicated to keep
6646 track of this in the cache, so now Exim always runs a verification when a
6647 callout is required, relying on the callout cache for the optimization.
6648 The overhead is duplication of the address routing, but this should not be
6651 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6652 to be verified with callout=postmaster, and the main callout worked but the
6653 postmaster check failed, the verification correctly failed. However, if a
6654 subsequent RCPT command asked for sender verification *without* the
6655 postmaster check, incorrect caching caused this verification also to fail,
6658 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6659 it was not caching the DNS options (qualify_single, search_parents) that
6660 were used when the lookup failed. A subsequent lookup with different
6661 options therefore always gave the same answer, though there were cases
6662 where it should not have. (Example: a "domains = !$mx_any" option on a
6663 dnslookup router: the "domains" option is always processed without any
6664 widening, but the router might have qualify_single set.) Now Exim uses the
6665 cached value only when the same options are set.
6667 32. Added John Jetmore's "exipick" utility to the distribution.
6669 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6670 than a timeout (e.g. a certificate is required, and is not provided), an
6671 Exim server now closes the connection immediately. Previously it waited for
6672 the client to close - but if the client is SSL, it seems that they each
6673 wait for each other, leading to a delay before one of them times out.
6675 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6676 maintained 0.8.x compatibility because I don't think many are using it, and
6677 it is clearly obsolete.
6679 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6682 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6683 client certificate was expired. A simple patch fixes this, though I don't
6684 understand the full logic of why the verify callback is called multiple
6687 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6688 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6689 which causes problems with some clients (such as the Certicom SSL Plus
6690 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6691 disables the coutermeasure allowing Eudora to connect."
6693 38. Exim was not checking that a write() to a log file succeeded. This could
6694 lead to Bad Things if a log got too big, in particular if it hit a file
6695 size limit. Exim now panics and dies if it cannot write to a log file, just
6696 as it does if it cannot open a log file.
6698 39. Modified OS/Makefile-Linux so that it now contains
6700 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6702 The two -D definitions ensure that Exim is compiled with large file
6703 support, which makes it possible to handle log files that are bigger than
6706 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6707 instance) a domain was checked against a named list that involved a lookup,
6708 causing $domain_data to be set, then another domain was checked against the
6709 same list, then the first domain was re-checked, the value of $domain_data
6710 after the final check could be wrong. In particular, if the second check
6711 failed, it could be set empty. This bug probably also applied to
6714 41. The strip_trailing_dot option was not being applied to the address given
6715 with the -f command-line option.
6717 42. The code for reading a message's header from the spool was incrementing
6718 $received_count, but never initializing it. This meant that the value was
6719 incorrect (doubled) while delivering a message in the same process in which
6720 it was received. In the most common configuration of Exim, this never
6721 happens - a fresh exec is done - but it can happen when
6722 deliver_drop_privilege is set.
6724 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6725 it now includes up to 150 characters of the unexpected data in the log
6728 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6729 and building data strings. The size of both of these buffers was 10 000
6730 bytes - far larger than anybody would *ever* want, thought I. Needless to
6731 say, somebody hit the limit. I have increased the maximum line length to
6732 20 000 and the maximum data length of concatenated lines to 100 000. I have
6733 also fixed two bugs, because there was no checking on these buffers. Tsk,
6734 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6735 buffer is too small.
6737 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6738 lsearch lookups. Now it does.
6740 46. When parsing a route_list item in a manualroute router, a fixed-length
6741 buffer was used for the list of hosts. I made this 1024 bytes long,
6742 thinking that nobody would ever have a list of hosts that long. Wrong.
6743 Somebody had a whole pile of complicated expansion conditions, and the
6744 string was silently truncated, leading to an expansion error. It turns out
6745 that it is easier to change to an unlimited length (owing to other changes
6746 that have happened since this code was originally written) than to build
6747 structure for giving a limitation error. The length of the item that
6748 expands into the list of hosts is now unlimited.
6750 47. The lsearch lookup could not handle data where the length of text line was
6751 more than 4095 characters. Such lines were truncated, leading to shortened
6752 data being returned. It should now handle lines of any length.
6754 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6755 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6758 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6759 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6760 no longer happens in comment lines. A list of replacements is now placed
6761 at the head of all of the source files, except those whose only change is
6762 to replace PERL_COMMAND in the very first #! line.
6764 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6765 messages on the queue, with a bottom-up merge sort, using code contributed
6766 by Michael Haardt. This should make operations like -bp somewhat faster on
6767 large queues. It won't affect queue runners, except when queue_run_in_order
6770 51. Installed eximstats 1.31 in the distribution.
6772 52. Added support for SRV lookups to the dnslookup router.
6774 53. If an ACL referred to $message_body or $message_body_end, the value was not
6775 reset for any messages that followed in the same SMTP session.
6777 54. The store-handling optimization for building very long strings was not
6778 differentiating between the different store pools. I don't think this
6779 actually made any difference in practice, but I've tidied it.
6781 55. While running the routers to verify a sender address, $sender_address
6782 was still set to the sender address. This is wrong, because when routing to
6783 send a bounce to the sender, it would be empty. Therefore, I have changed
6784 it so that, while verifying a sender address, $sender_address is set to <>.
6785 (There is no change to what happens when verifying a recipient address.)
6787 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6788 target A or AAAA records (if not already returned) without resetting the
6789 qualify_single or search_parents options of the DNS resolver. These are
6790 inappropriate in this case because the targets of MX and SRV records must
6791 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6792 target that, when qualified, matched something in the local domain. These
6793 two options are now turned off when doing these lookups.
6795 57. It seems that at least some releases of Reiserfs (which does not have the
6796 concept of a fixed number of inodes) returns zero and not -1 for the
6797 number of available inodes. This interacted badly with check_spool_inodes,
6798 which assumed that -1 was the "no such thing" setting. What I have done is
6799 to check that the total number of inodes is greater than zero before doing
6800 the test of how many are available.
6802 58. When a "warn" ACL statement has a log_message modifier, the message is
6803 remembered, and not repeated. This is to avoid a lot of repetition when a
6804 message has many recipients that cause the same warning to be written.
6805 However, Exim was preserving the list of already written lines for an
6806 entire SMTP session, which doesn't seem right. The memory is now reset if a
6807 new message is started.
6809 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6810 debugging output unless log_rewrite was also set.
6812 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6813 of (int)(handle) when we know that handle contains (void *)(-1).
6815 61. The Exim daemon panic-logs an error return when it closes the incoming
6816 connection. However "connection reset by peer" seems to be common, and
6817 isn't really an error worthy of noting specially, so that particular error
6820 62. When Exim is trying to find all the local interfaces, it used to panic and
6821 die if the ioctl to get the interface flags failed. However, it seems that
6822 on at least one OS (Solaris 9) it is possible to have an interface that is
6823 included in the list of interfaces, but for which you get a failure error
6824 for this call. This happens when the interface is not "plumbed" into a
6825 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6826 failure of the "get flags" call assumes that the interface is down.
6828 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6829 makes life easier for people who are doing arithmetic on fields extracted
6830 from dates, where you often get leading zeros that should not be
6831 interpreted as octal.
6833 64. Added qualify_domain to the redirect router, to override the global
6836 65. If a pathologically long header line contained very many addresses (the
6837 report of this problem mentioned 10 000) and each of them was rewritten,
6838 Exim could use up a very large amount of memory. (It kept on making new
6839 copies of the header line as it rewrote, and never released the old ones.)
6840 At the expense of a bit more processing, the header rewriting function has
6841 been changed so that it no longer eats memory in this way.
6843 66. The generation of the Received: header has been moved from the time that a
6844 message starts to be received, to the time that it finishes. The timestamp
6845 in the Received: header should now be very close to that of the <= log
6846 line. There are two side-effects of this change:
6848 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6849 logged header lines no longer include the local Received: line, because
6850 it has not yet been created. The same applies to a copy of the message
6851 that is returned to a non-SMTP sender when a message is rejected.
6853 (b) When a filter file is tested using -bf, no additional Received: header
6854 is added to the test message. After some thought, I decided that this
6857 This change does not affect the value of $received_for. It is still set
6858 after address rewriting, but before local_scan() is called.
6860 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6862 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6863 gave an unhelpful panic error message, and a defer error. I have managed to
6864 change this behaviour so that it now rejects any supplied certificate,
6865 which seems right, as the list of acceptable certificates is empty.
6867 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6868 gave an unhelpful defer error. I have not managed to make this reject any
6869 supplied certificates, but the error message it gives is "no certificate
6870 supplied", which is not helpful.
6872 70. exigrep's output now also includes lines that are not associated with any
6873 message, but which match the given pattern. Implemented by a patch from
6874 Martin Sluka, which also tidied up the Perl a bit.
6876 71. Recipient callout verification, like sender verification, was using <> in
6877 the MAIL FROM command. This isn't really the right thing, since the actual
6878 sender may affect whether the remote host accepts the recipient or not. I
6879 have changed it to use the actual sender in the callout; this means that
6880 the cache record is now keyed on a recipient/sender pair, not just the
6881 recipient address. There doesn't seem to be a real danger of callout loops,
6882 since a callout by the remote host to check the sender would use <>.
6883 [SEE ABOVE: changed after hitting problems.]
6885 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6886 temporary errors. However, in the case of such a code being given after
6887 the end of a data transmission (i.e. after ".") Exim was failing to write
6888 a retry record for the message. (Yes, there was some broken host that was
6889 actually sending 8xx at this point.)
6891 73. An unknown lookup type in a host list could cause Exim to panic-die when
6892 the list was checked. (An example that provoked this was putting <; in the
6893 middle of a list instead of at the start.) If this happened during a DATA
6894 ACL check, a -D file could be left lying around. This kind of configuration
6895 error no longer causes Exim to die; instead it causes a defer error. The
6896 incident is still logged to the main and panic logs.
6898 74. Buglet left over from Exim 3 conversion. The message "too many messages
6899 in one connection" was written to the rejectlog but not the mainlog, except
6900 when address rewriting (yes!) was being logged.
6902 75. Added write_rejectlog option.
6904 76. When a system filter was run not as root (that is, when system_filter_user
6905 was set), the values of the $n variables were not being returned to the
6906 main process; thus, they were not subsequently available in the $sn
6909 77. Added +return_path_on_delivery log selector.
6911 78. A connection timeout was being treated differently from recipients deferred
6912 when testing hosts_max_try with a message that was older than the host's
6913 retry timeout. (The host should not be counted, thus allowing all hosts to
6914 be tried at least once before bouncing.) This may have been the cause of an
6915 occasionally reported bug whereby a message would remain on the queue
6916 longer than the retry timeout, but would be bounced if a delivery was
6917 forced. I say "may" because I never totally pinned down the problem;
6918 setting up timeout/retry tests is difficult. See also the next item.
6920 79. The ultimate address timeout was not being applied to errors that involved
6921 a combination of host plus message (for example, a timeout on a MAIL
6922 command). When an address resolved to a number of possible hosts, and they
6923 were not all tried for each delivery (e.g. because of hosts_max_try), a
6924 message could remain on the queue longer than the retry timeout.
6926 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6929 81. Fixed an obscure SMTP outgoing bug which required at least the following
6930 conditions: (a) there was another message waiting for the same server;
6931 (b) the server returned 5xx to all RCPT commands in the first message so
6932 that the message was not completed; (c) the server dropped the connection
6933 or gave a negative response to the RSET that Exim sends to abort the
6934 transaction. The observed case was a dropped connection after DATA that had
6935 been sent in pipelining mode. That is, the server had advertised PIPELINING
6936 but was not implementing it correctly. The effect of the bug was incorrect
6937 behaviour, such as trying another host, and this could lead to a crash.
6943 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6944 and daemon.c were passed as pointers to ints; they should have been
6945 pointers to socklen_t variables (which are typically unsigned ints).
6947 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6950 3. Fixed a really odd bug that affected only the testing scheme; patching a
6951 certain fixed string in the binary changed the value of another string that
6952 happened to be identical to the end of the original first string.
6954 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6955 name", it returns that address as the IP address. On some operating
6956 systems (e.g. Solaris), it also passes back the IP address string as the
6957 "host name". However, on others (e.g. Linux), it passes back an empty
6958 string. Exim wasn't checking for this, and was changing the host name to an
6959 empty string, assuming it had been canonicalized.
6961 5. Although rare, it is permitted to have more than one PTR record for a given
6962 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6963 all the names associated with an address, because they do in Solaris.
6964 However, it seems that they do not in Linux for data that comes from the
6965 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6966 I found this out when I moved to a new Linux workstation and tried to run
6967 the Exim test suite.
6969 To get round this problem I have changed the code so that it now does its
6970 own call to the DNS to look up PTR records when searching for a host name.
6971 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6972 addresses that are only in /etc/hosts are still found.
6974 This behaviour is, however, controlled by an option called host_lookup_
6975 order, which defaults to "bydns:byaddr". If people want to use the other
6976 order, or indeed, just use one or the other means of lookup, they can
6977 specify it in this variable.
6979 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6980 some operating systems, this comes back from gethostbyaddr() as an empty
6981 string, and this is what Exim used to test for. However, it seems that in
6982 other systems, "." is yielded. Exim now tests for this case too.
6984 7. The values of check_spool_space and check_log_space are now held internally
6985 as a number of kilobytes instead of an absolute number of bytes. If a
6986 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6987 kilobyte. This means that much larger values can be stored.
6989 8. Exim monitor: an attempt to get the action menu when not actually pointing
6990 at a message produces an empty menu entitled "No message selected". This
6991 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6992 no entries in it ("Shell widget menu has zero width and/or height"). So I
6993 have added a single, blank menu entry in this case.
6995 9. Added ${quote_local_part.
6997 10. MIME decoding is now applied to the contents of Subject: header lines when
7000 11. Now that a reference to $sender_host_address automatically causes a reverse
7001 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7002 host lookup before query-style lookups in lists that might use this
7003 variable. This has therefore been abolished, and the "net-" prefix is no
7004 longer necessary for query-style lookups.
7006 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7007 have been a typo for LFLAGS, so it has been changed.
7009 13. The install script calls Exim with "-C /dev/null" in order to find the
7010 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7011 to be output. However, since Exim outputs its version number before the
7012 error, it didn't break the script. It just looked ugly. I fixed this by
7013 always allowing "-C /dev/null" if the caller is root.
7015 14. Ignore overlarge ACL variable number when reading spool file - insurance
7016 against a later release with more variables having written the file.
7018 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7019 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7020 this, as well as the form without the "IPv6" on the front.
7022 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7023 OS/Makefile-Darwin file.
7025 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7026 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7028 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7029 variable. However, some OS use ints for inodes. I've added cast to long int
7030 to get rid of the compiler warning.
7032 19. I had forgotten to lock out "/../" in configuration file names when
7033 ALT_CONFIG_PREFIX was set.
7035 20. Routers used for verification do not need to specify transports. However,
7036 if such a router generated a host list, and callout was configured, Exim
7037 crashed, because it could not find a port number from the (non-existent)
7038 transport. It now assumes port 25 in this circumstance.
7040 21. Added the -t option to exigrep.
7042 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7043 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7044 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7045 them is set, LOOKUP_LSEARCH is forced.
7047 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7049 24. Added sender and host information to the "rejected by local_scan()" log
7050 line; previously there was no indication of these.
7052 25. Added .include_if_exists.
7054 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7055 Linux. It turns out that not all file systems support this. Apparently some
7056 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7057 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7058 not supported on the file descriptor, is now ignored when Exim is trying to
7059 sync a directory. This applies only to Linux.
7061 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7063 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7064 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7067 29. Added support for maildirsize files from supplied patch (modified a bit).
7069 30. The use of :fail: followed by an empty string could lead Exim to respond to
7070 sender verification failures with (e.g.):
7072 550 Verification failed for <xxx>
7073 550 Sender verify failed
7075 where the first response line was missing the '-' that indicates it is not
7076 the final line of the response.
7078 31. The loop for finding the name of the user that called Exim had a hardwired
7079 limit of 10; it now uses the value of finduser_retries, which is used for
7080 all other user lookups.
7082 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7085 33. Exim was neglecting to zero errno before one call of strtol() when
7086 expanding a string and expecting an integer value. On some systems this
7087 resulted in spurious "integer overflow" errors. Also, it was casting the
7088 result into an int without checking.
7090 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7091 did not work. The code looks as if it has *never* worked, though it appears
7092 to have been documented since at least release 1.62. I have made it work.
7094 35. The "timeout_DNS" error in retry rules, also documented since at least
7095 1.62, also never worked. As it isn't clear exactly what this means, and
7096 clearly it isn't a major issue, I have abolished the feature by treating it
7097 as "timeout", and writing a warning to the main and panic logs.
7099 36. The display of retry rules for -brt wasn't always showing the error code
7102 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7103 timeout_connect_A, timeout_connect_MX.
7105 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7106 to the empty sender.
7108 39. The daemon was not analysing the content of -oX till after it had closed
7109 stderr and disconnected from the controlling terminal. This meant that any
7110 syntax errors were only noted on the panic log, and the return code from
7111 the command was 0. By re-arranging the code a little, I've made the
7112 decoding happen first, so such errors now appear on stderr, and the return
7113 code is 1. However, the actual setting up of the sockets still happens in
7114 the disconnected process, so errors there are still only recorded on the
7117 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7118 connections (as happens on some IP stacks) was logged at start up time as
7119 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7120 it from "IPv6 and IPv4", which means that two separate sockets are being
7123 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7124 says whether AF_INET or AF_INET6 was passed as an argument.
7126 42. Exiwhat output was messed up when time zones were included in log
7129 43. Exiwhat now gives more information about the daemon's listening ports,
7130 and whether -tls-on-connect was used.
7132 44. The "port" option of the smtp transport is now expanded.
7134 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7135 silently ignored. Now an error message is written to the main and panic
7138 46. There's a new ACL modifier called "logwrite" which writes to a log file
7139 as soon as it is encountered.
7141 47. Added $local_user_uid and $local_user_gid at routing time.
7143 48. Exim crashed when trying to verify a sender address that was being
7146 49. Exim was recognizing only a space character after ".include". It now also
7147 recognizes a tab character.
7149 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7150 extracting the relevant information from the specification. The man page no
7151 longer contains scrambled data for the -d option, and I've added a section
7152 at the front about calling Exim under different names.
7154 51. Added "extra_headers" argument to the "mail" command in filter files.
7156 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7159 53. Installed eximstats 1.29.
7161 54. Added transport_filter_timeout as a generic transport option.
7163 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7164 Cc: header lines. This was required by RFC 822, but it not required by RFC
7167 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7168 incoming messages that did not have them. Now it does so only if the
7169 message originates locally, that is, if there is no associated remote host
7170 address. When Resent- header lines are present, this applies to the Resent-
7171 lines rather than the non-Resent- lines.
7173 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7174 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7176 58. Messages for configuration errors now include the name of the main
7177 configuration file - useful now that there may be more than one file in a
7178 list (.included file names were always shown).
7180 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7181 for those rare installations that do not start the daemon as root or run it
7182 setuid root. I've cut out the call to initgroups() if the daemon is not
7185 60. The Exim user and group can now be bound into the binary as text strings
7186 that are looked up at the start of Exim's processing.
7188 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7190 62. Added $mailstore_basename variable.
7192 63. Installed patch to sieve.c from Michael Haardt.
7194 64. When Exim failed to open the panic log after failing to open the main log,
7195 the original message it was trying to log was written to stderr and debug
7196 output, but if they were not available (the usual case in production), it
7197 was lost. Now it is written to syslog before the two lines that record the
7198 failures to open the logs.
7200 65. Users' Exim filters run in subprocesses under the user's uid. It is
7201 possible for a "deliver" command or an alias in a "personal" command to
7202 provoke an address rewrite. If logging of address rewriting is configured,
7203 this fails because the process is not running as root or exim. There may be
7204 a better way of dealing with this, but for the moment (because 4.30 needs
7205 to be released), I have disabled address rewrite logging when running a
7206 filter in a non-root, non-exim process.
7212 1. The buildconfig auxiliary program wasn't quoting the value set for
7213 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7214 not defined. This bug was masked in 4.22 by the effect that was fixed in
7217 2. Some messages that were rejected after a message id was allocated were
7218 shown as "incomplete" by exigrep. It no longer does this for messages that
7219 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7221 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7222 have allow_domain_literals set, the ID did not get logged in the <= line.
7223 Domain literals are now always recognized in Message-ID: header lines.
7225 4. The first argument for a ${extract expansion item is the key name or field
7226 number. Leading and trailing spaces in this item were not being ignored,
7227 causing some misleading effects.
7229 5. When deliver_drop_privilege was set, single queue runner processes started
7230 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7231 same command in the process it spins off) were not dropping privilege.
7233 6. When the daemon running as "exim" started a queue runner, it always
7234 re-executed Exim in the spun-off process. This is a waste of effort when
7235 deliver_drop_privilege is set. The new process now just calls the
7236 queue-runner function directly.
7242 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7245 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7246 ignored. Though the use of -oP was forcing the writing of a pid file, it
7247 was always written to the default place.
7249 3. If the message "no IP address found for host xxxx" is generated during
7250 incoming verification, it is now followed by identification of the incoming
7251 connection (so you can more easily find what provoked it).
7253 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7255 5. Added some features to "harden" Exim a bit more against certain attacks:
7257 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7258 be put in Local/Makefile. This is like the never_users runtime option,
7259 but it cannot be overridden. The default setting is "root".
7261 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7262 prefix string with which any file named in a -C command line option
7265 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7266 is retained for -C and -D only if the caller of Exim is root. Without
7267 it, the exim user may also use -C and -D and retain privilege.
7269 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7270 command line option is disabled.
7272 6. Macro names set by the -D option must start with an upper case letter, just
7273 like macro names defined in the configuration file.
7275 7. Added "dereference=" facility to LDAP.
7277 8. Two instances of the typo "uknown" in the source files are fixed.
7279 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7280 the Configure-Makefile script screwed up while processing it.
7282 10. Incorporated PCRE 4.4.
7284 11. The SMTP synchronization check was not operating right at the start of an
7285 SMTP session. For example, it could not catch a HELO sent before the client
7286 waited for the greeting. There is now a check for outstanding input at the
7287 point when the greeting is written. Because of the duplex, asynchronous
7288 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7289 way, but not yet received, when the check is performed.
7291 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7292 on TCP/IP sockets, because this apparently causes some broken clients to
7295 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7296 unchanged) from the Cygwin maintainer.
7298 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7299 was supported instead of testing for mbx. Effectively a typo.
7301 15. The spa authenticator server code was not checking that the input it
7302 received was valid base64.
7304 16. The debug output line for the "set" modifier in ACLs was not showing the
7305 name of the variable that was being set.
7307 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7309 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7310 lookup on its own. Something else was needed to trigger the lookup. For
7311 example, a match in host_lookup or the need for a host name in a host list.
7312 Now, if $sender_host_name is referenced and the host name has not yet been
7313 looked up, a lookup is performed. If the lookup fails, the variable remains
7314 empty, and $host_lookup_failed is set to "1".
7316 19. Added "eqi" as a case-independent comparison operator.
7318 20. The saslauthd authentication condition could segfault if neither service
7319 nor realm was specified.
7321 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7322 error message that was logged was misleading, and incoming SMTP
7323 connections were dropped. The message is now more accurate, and temporary
7324 errors are given to SMTP connections.
7326 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7327 (except RSET) with a 421 error, until QUIT is received. However, it was
7328 failing to send a response to QUIT.
7330 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7331 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7332 ACL is now run after the helo_try_verify_hosts code.
7334 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7335 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7336 case-independent, so other case variants are also recognized). Apparently
7337 some systems use these upper case variants.
7339 25. If more than two messages were waiting for the same host, and a transport
7340 filter was specified for the transport, Exim sent two messages over the
7341 same TCP/IP connection, and then failed with "socket operation on non-
7342 socket" when it tried to send the third.
7344 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7346 27. The extern definition of crypt16() in expand.c was not being excluded when
7347 the OS had its own crypt16() function.
7349 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7350 as a preferred synonym for return_size_limit, both as an option and as an
7353 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7355 30. Changed the default configuration ACL to relax the local part checking rule
7356 for addresses that are not in any local domains. For these addresses,
7357 slashes and pipe symbols are allowed within local parts, but the sequence
7358 /../ is explicitly forbidden.
7360 31. SPA server authentication was not clearing the challenge buffer before
7363 32. log_message in a "warn" ACL statement was writing to the reject log as
7364 well as to the main log, which contradicts the documentation and doesn't
7365 seem right (because no rejection is happening). So I have stopped it.
7367 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7368 However, I am unable to do any testing of this.
7370 34. Fixed an infelicity in the appendfile transport. When checking directories
7371 for a mailbox, to see if any needed to be created, it was accidentally
7372 using path names with one or more superfluous leading slashes; tracing
7373 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7375 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7376 contents are added to the log line that is written for every discarded
7377 recipient. (Previously a log_message setting was ignored.)
7379 36. The ${quote: operator now quotes the string if it is empty.
7381 37. The install script runs exim in order to find its version number. If for
7382 some reason other than non-existence or emptiness, which it checks, it
7383 could not run './exim', it was installing it with an empty version number,
7384 i.e. as "exim-". This error state is now caught, and the installation is
7387 38. An argument was missing from the function that creates an error message
7388 when Exim fails to connect to the socket for saslauthd authentication.
7389 This could cause Exim to crash, or give a corrupted message.
7391 39. Added isip, isip4, and isip6 to ${if conditions.
7393 40. The ACL variables $acl_xx are now saved with the message, and can be
7394 accessed later in routers, transports, and filters.
7396 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7397 strings in the file are not string-expanded.
7399 42. If a MAIL command specified a SIZE value that was too large to fit into an
7400 int variable, the check against message_size_limit failed. Such values are
7401 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7402 day this will have to be increased, but I don't think I want to be around
7403 when emails are that large.
7410 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7411 iconv() is not standard in FreeBSD.
7413 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7414 IPv6 enabled. The observed symptom was a segmentation fault on return from
7415 the function os_common_find_running_interfaces() in src/os.c.
7417 3. In the check_special_case() function in daemon.c I had used "errno" as an
7418 argument name, which causes warnings on some systems. This was basically a
7419 typo, since it was named "eno" in the comments!
7421 4. The code that waits for the clock to tick (at a resolution of some fraction
7422 of a second) so as to ensure message-id uniqueness was always waiting for
7423 at least one whole tick, when it could have waited for less. [This is
7424 almost certainly not relevant at current processor speeds, where it is
7425 unlikely to ever wait at all. But we try to future-proof.]
7427 5. The function that sleeps for a time interval that includes fractions of a
7428 second contained a race. It did not block SIGALRM between setting the
7429 timer, and suspending (a couple of lines later). If the interval was short
7430 and the sigsuspend() was delayed until after it had expired, the suspension
7431 never ended. On busy systems this could lead to processes getting stuck for
7434 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7435 process, before it forks any delivery processes. The open lookup caching
7436 mechanism meant that the open file or database connection was passed into
7437 the delivery process. The problem was that delivery processes always tidy
7438 up cached lookup data. This could cause a problem for the next delivery
7439 process started by the queue runner, because the external queue runner
7440 process does not know about the closure. So the next delivery process
7441 still has data in the lookup cache. In the case of a file lookup, there was
7442 no problem because closing a file descriptor in a subprocess doesn't affect
7443 the parent. However, if the lookup was caching a connection to a database,
7444 the connection was closed, and the second delivery process was likely to
7445 see errors such as "PGSQL: query failed: server closed the connection
7446 unexpectedly". The problem has been fixed by closing all cached lookups
7447 in a queue runner before running a delivery process.
7449 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7450 seem to have the "const" qualifier which it has on other OS. I've
7453 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7454 *of the same type* (client or server) with the same public name that an
7455 error should be diagnosed.
7457 9. When Exim looked up a host name for an IP address, but failed to find the
7458 original IP address when looking up the host name (a safety check), it
7459 output the message "<ip address> does not match any IP for NULL", which was
7460 confusing, to say the least. The bug was that the host name should have
7461 appeared instead of "NULL".
7463 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7464 user that is built into the binary, and the -C or -D options is used, root
7465 privilege is dropped before the configuration file is read. In addition,
7466 logging is switched to stderr instead of the normal log files. If the
7467 configuration then re-defines the Exim user, the unprivileged environment
7468 is probably not what is expected, so Exim logs a panic warning message (but
7471 However, if deliver_drop_privilege is set, the unprivileged state may well
7472 be exactly what is intended, so the warning has been cut out in that case,
7473 and Exim is allowed to try to write to its normal log files.
7479 1. smtp_return_error_details was not giving details for temporary sender
7480 or receiver verification errors.
7482 2. Diagnose a configuration error if two authenticators have the same public
7485 3. Exim used not to create the message log file for a message until the first
7486 delivery attempt. This could be confusing when incoming messages were held
7487 for policy or load reasons. The message log file is now created at the time
7488 the message is received, and an initial "Received" line is written to it.
7490 4. The automatically generated man page for command line options had a minor
7491 bug that caused no ill effects; however, a more serious problem was that
7492 the procedure for building the man page automatically didn't always
7493 operate. Consequently, release 4.20 contains an out-of-date version. This
7494 shouldn't happen again.
7496 5. When building Exim with embedded Perl support, the script that builds the
7497 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7498 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7500 6. The freeze_tell option was not being used for messages that were frozen on
7501 arrival, either by an ACL or by local_scan().
7503 7. Added the smtp_incomplete_transaction log selector.
7505 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7506 was accepting AUTH without a new EHLO.
7508 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7509 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7512 10. Logging of TCP/IP connections (when configured) now happens in the main
7513 daemon process instead of the child process, so that the TCP/IP connection
7514 count is more accurate (but it can never be perfect).
7516 11. The use of "drop" in a nested ACL was not being handled correctly in the
7517 outer ACL. Now, if condition failure induced by the nested "drop" causes
7518 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7519 or "require"), the connection is dropped.
7521 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7522 that yield "discard" can now be used with an "accept" or a "discard" verb,
7523 but an error is generated for any others (because I can't see a useful way
7524 to define what should happen).
7526 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7527 are now processed in the same way as lines in the Exim configuration file.
7528 In particular, continuation lines are supported.
7530 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7532 15. Added -ti meaning -t -i.
7534 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7535 domains, and warn by logging if others are found.
7537 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7538 returned from GIFCONF when Exim is trying to find the list of interfaces on
7539 a host. The code in os.c has been modified to copy each ifreq to an aligned
7540 structure in all cases.
7542 Also, in some cases, the returned ifreq's were being copied to a 'struct
7543 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7544 means the last couple of bytes of an IPv6 address could be chopped if the
7545 ifreq contained only a normal sockaddr (14 bytes storage).
7547 18. Named domain lists were not supported in the hosts_treat_as_local option.
7548 An entry such as +xxxx was not recognized, and was treated as a literal
7551 19. Ensure that header lines added by a DATA ACL are included in the reject log
7552 if the ACL subsequently rejects the message.
7554 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7555 MD5 (which is deprecated).
7557 21. When testing a filter file using -bf, Exim was writing a message when it
7558 took the sender from a "From " line in the message, but it was not doing so
7559 when it took $return_path from a Return-Path: header line. It now does.
7561 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7562 with a valid header line field name (a series of printing characters
7563 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7565 23. Changed "disc" in the source to "disk" to conform to the documentation and
7566 the book and for uniformity.
7568 24. Ignore Sendmail's -Ooption=value command line item.
7570 25. When execve() failed while trying to run a command in a pipe transport,
7571 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7572 could be confused with a return value of 69 from the command itself. This
7573 has been changed to 127, the value the shell returns if it is asked to run
7574 a non-existent command. The wording for the related log line suggests a
7575 non-existent command as the problem.
7577 26. If received_header_text expands to an empty string, do not add a Received:
7578 header line to the message. (Well, it adds a token one on the spool, but
7579 marks it "old" so that it doesn't get used or transmitted.)
7581 27. Installed eximstats 1.28 (addition of -nt option).
7583 28. There was no check for failure on the call to getsockname() in the daemon
7584 code. This can fail if there is a shortage of resources on the system, with
7585 ENOMEM, for example. A temporary error is now given on failure.
7587 29. Contrary to the C standard, it seems that in some environments, the
7588 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7589 program. Exim now does this explicitly; it affects the formatting of
7590 timestamps using strftime().
7592 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7593 complaints. I've now initialized all the variables, to avoid this.
7595 32. Header lines added by a system filter were not being "seen" during
7596 transport-time rewrites.
7598 33. The info_callback() function passed to OpenSSL is set up with type void
7599 (*)(SSL *, int, int), as described somewhere. However, when calling the
7600 function (actually a macro) that sets it up, the type void(*)() is
7601 expected. I've put in a cast to prevent warnings from picky compilers.
7603 34. If a DNS black list lookup found a CNAME record, but there were no A
7604 records associated with the domain it pointed at, Exim crashed.
7606 35. If a DNS black list lookup returned more than one A record, Exim ignored
7607 all but the first. It now scans all returned addresses if a particular IP
7608 value is being sought. In this situation, the contents of the
7609 $dnslist_value variable are a list of all the addresses, separated by a
7612 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7613 to accept a host name and all its aliases if the forward lookup for any of
7614 them yielded the IP address of the incoming connection. Now it accepts only
7615 those names whose forward lookup yields the correct IP address. Any other
7616 names are discarded. This closes a loophole whereby a rogue DNS
7617 administrator could create reverse DNS records to break through a
7618 wildcarded host restriction in an ACL.
7620 37. If a user filter or a system filter that ran in a subprocess used any of
7621 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7622 the wrong values were passed to the pipe command ($thisaddress had the
7623 value of $0, $0 had the value of $1, etc). This bug was introduced by
7624 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7626 38. Improved the line breaking for long SMTP error messages from ACLs.
7627 Previously, if there was no break point between 40 and 75 characters, Exim
7628 left the rest of the message alone. Two changes have been made: (a) I've
7629 reduced the minimum length to 35 characters; (b) if it can't find a break
7630 point between 35 and 75 characters, it looks ahead and uses the first one
7631 that it finds. This may give the occasional overlong line, but at least the
7632 remaining text gets split now.
7634 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7635 file descriptors might be low, and that setting 1000 would always raise it.
7636 It turns out that in some environments, the limit is already over 1000 and
7637 that lowering it causes trouble. So now Exim takes care not to decrease it.
7639 40. When delivering a message, the value of $return_path is set to $sender_
7640 address at the start of routing (routers may change the value). By an
7641 oversight, this default was not being set up when an address was tested by
7642 -bt or -bv, which affected the outcome if any router or filter referred to
7645 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7646 log only when "message" or "log_message" are set. However, if one of the
7647 conditions was an address verification, or a call to a nested ACL, the
7648 messages generated by the underlying test were being passed through. This
7649 no longer happens. The underlying message is available in $acl_verify_
7650 message for both "message" and "log_message" expansions, so it can be
7651 passed through if needed.
7653 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7654 new expansion $bh_ to give the encoded byte string without charset
7655 translation. Translation happens only if iconv() is available; HAVE_ICONV
7656 indicates this at build time. HEADERS_CHARSET gives the charset to
7657 translate to; headers_charset can change it in the configuration, and
7658 "headers charset" can change it in an individual filter file.
7660 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7661 that creates RFC 2047 encoded "words" labels them as that charset instead
7662 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7663 expansion operator; (ii) when Exim creates a From: line for a local
7664 message; (iii) when a header line is rewritten to include a "phrase" part.
7666 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7667 buggy, causing it to skip the first lines of messages whose message ID
7668 ended in 'D'. This would not have bitten before Exim release 4.14, because
7669 message IDs were unlikely to end in 'D' before then. The effect was to have
7670 incorrect size information for certain domains.
7672 45. #include "config.h" was missing at the start of the crypt16.c module. This
7673 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7676 46. If there was a timeout during a "random" callout check, Exim treated it as
7677 a failure of the random address, and carried on sending RSET and the real
7678 address. If the delay was just some slowness somewhere, the response to the
7679 original RCPT would be taken as a response to RSET and so on, causing
7680 mayhem of various kinds.
7682 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7683 when I implemented it. It didn't allow for the fact that some option values
7684 may legitimately be negative (e.g. size_addition), and it didn't even do
7685 the right test for positive values.
7687 48. Domain names in DNS records are case-independent. Exim always looks them up
7688 in lower case. Some resolvers return domain names in exactly the case they
7689 appear in the zone file, that is, they may contain uppercase letters. Not
7690 all resolvers do this - some return always lower case. Exim was treating a
7691 change of case by a resolver as a change of domain, similar to a widening
7692 of a domain abbreviation. This triggered its re-routing code and so it was
7693 trying to route what was effectively the same domain again. This normally
7694 caused routing to fail (because the router wouldn't handle the domain
7695 twice). Now Exim checks for this case specially, and just changes the
7696 casing of the domain that it ultimately uses when it transmits the message
7699 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7702 50. If a filter generated a file delivery with a non-absolute name (possible if
7703 no home directory exists for the router), the forbid_file option was not
7706 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7707 the existing equality matching.
7709 52. Exim was using ints instead of ino_t variables in some places where it was
7710 dealing with inode numbers.
7712 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7713 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7714 called TMPDIR, and if it finds it is different, it changes its value.
7716 54. The smtp_printf() function is now made available to local_scan() so
7717 additional output lines can be written before returning. There is also an
7718 smtp_fflush() function to enable the detection of a dropped connection.
7719 The variables smtp_input and smtp_batched_input are exported to
7722 55. Changed the default runtime configuration: the message "Unknown user"
7723 has been removed from the ACL, and instead placed on the localuser router,
7724 using the cannot_route_message feature. This means that any verification
7725 failures that generate their own messages won't get overridden. Similarly,
7726 the "Unrouteable address" message that was in the ACL for unverifiable
7727 relay addresses has also been removed.
7729 56. Added hosts_avoid_esmtp to the smtp transport.
7731 57. The exicyclog script was not checking for the esoteric option
7732 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7733 will work only if exicyclog is run under the appropriate euid.
7735 58. Following a discussion on the list, the rules by which Exim recognises line
7736 endings on incoming messages have been changed. The -dropcr and drop_cr
7737 options are now no-ops, retained only for backwards compatibility. The
7738 following line terminators are recognized: LF CRLF CR. However, special
7739 processing applies to CR:
7741 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7742 nor a local message in the state where . is a terminator.
7744 (ii) If a bare CR is encountered in a header line, an extra space is added
7745 after the line terminator so as not to end the header. The reasoning
7746 behind this is that bare CRs in header lines are most likely either
7747 to be mistakes, or people trying to play silly games.
7749 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7750 was being incorrectly given as 18 bytes larger than it should have been.
7751 This is a VOB (very old bug).
7753 60. This may never have affected anything current, but just in case it has:
7754 When the local host is found other than at the start of a list of hosts,
7755 the local host, those with the same MX, and any that follow, are discarded.
7756 When the list in question was part of a longer list of hosts, the following
7757 hosts (not currently being processed) were also being discarded. This no
7758 longer happens. I'm not sure if this situation could ever has previously
7761 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7764 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7765 header. This is something that is recommended in a new Internet Draft, and
7766 is something that is documented as being done by Sendmail. There are two
7767 possible values. For messages generated by the autoreply transport, Exim
7770 Auto-Submitted: auto-replied
7772 whereas for all other generated messages (e.g. bounces) it adds
7774 Auto-Submitted: auto-generated
7776 63. The "personal" condition in filters now includes a test for the
7777 Auto-Submitted: header. If it contains the string "auto-" the message it
7778 not considered personal.
7780 64. Added rcpt_include_affixes as a generic transport option.
7782 65. Added queue_only_override (default true).
7784 66. Added the syslog_duplication option.
7786 67. If what should have been the first header line of a message consisted of
7787 a space followed by a colon, Exim was mis-interpreting it as a header line.
7788 It isn't of course - it is syntactically invalid and should therefore be
7789 treated as the start of the message body. The misbehaviour could have
7790 caused a number of strange effects, including loss of data in subsequent
7791 header lines, and spool format errors.
7793 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7794 client host had authenticated. This control can now be exercised by an ACL
7795 for more flexibility.
7797 69. By default, callouts do not happen when testing with -bh. There is now a
7798 variant, -bhc, which does actually run the callout code, including
7799 consulting and updating the callout cache.
7801 70. Added support for saslauthd authentication, courtesy of Alexander
7804 71. If statvfs() failed on the spool or log directories while checking their
7805 size for availability, Exim confusingly gave the error "space shortage".
7806 Furthermore, in debugging mode it crashed with a floating point exception.
7807 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7808 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7809 serious problem, Exim now writes to the main and panic logs when this
7810 happens, with details of the failure. It then refuses to accept the
7811 incoming message, giving the message "spool directory problem" or "log
7812 directory problem" with a 421 code for SMTP messages.
7814 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7815 0, 1, and 2 exist, because some OS complain for execs without them (see
7816 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7817 descriptors. However, the code omitted to check that the open succeeded,
7818 causing mysterious errors if for some reason the permissions on /dev/null
7819 got screwed. Now Exim writes a message to the main and panic logs, and
7820 bombs out if it can't open /dev/null.
7822 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7823 interact so that it is all more flexible. It is supposed to remain
7824 backwards compatible. Also added extra_local_interfaces.
7826 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7827 to bomb out with an assertion failure - to the client this appears as a
7828 connection drop. This problem occurs in the part of the code that was taken
7829 from the Samba project. Fortunately, the assertion is in a very simple
7830 function, so I have fixed this by reproducing the function inline in the
7831 one place where it is called, and arranging for authentication to fail
7832 instead of killing the process with assert().
7834 75. The SPA client code was not working when the server requested OEM rather
7835 than Unicode encoding.
7837 76. Added code to make require_files with a specific uid setting more usable in
7838 the case where statting the file as root fails - usually a non-root-mounted
7839 NFS file system. When this happens and the failure is EACCES, Exim now
7840 forks a subprocess and does the per-uid checking as the relevant uid.
7842 77. Added process_log_path.
7844 78. If log_file_path was not explicitly set, a setting of check_log_space or
7845 check_log_inodes was ignored.
7847 79. If a space check for the spool or log partitions fails, the incident is now
7848 logged. Of course, in the latter case the data may get lost...
7850 80. Added the %p formatting code to string_format() so that it can be used to
7851 print addresses in debug_print(). Adjusted all the address printing in the
7852 debugging in store.c to use %p rather than %d.
7854 81. There was a concern that a line of code in smtp_in.c could overflow a
7855 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7856 initially expressed, the concern was not well-founded, because trailing
7857 spaces are removed early. However, if the trailing spaces were followed by
7858 a NULL, they did not get removed, so the overflow was possible. Two fixes
7861 (a) I re-wrote the offending code in a cleaner fashion.
7862 (b) If an incoming SMTP command contains a NULL character, it is rejected
7865 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7866 runs initgroups(), so that if the Exim user is in any additional groups,
7867 they will be used during message reception.
7873 The change log for 4.20 and earlier releases has been archived.